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reactos/drivers/filesystems/btrfs/fileinfo.c
Victor Perevertkin 194ea909fd
[BTRFS][UBTRFS][SHELLBTRFS] Upgrade to 1.7.2 
CORE-16679
2020-04-23 07:07:36 +03:00

5968 lines
199 KiB
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/* Copyright (c) Mark Harmstone 2016-17
*
* This file is part of WinBtrfs.
*
* WinBtrfs is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public Licence as published by
* the Free Software Foundation, either version 3 of the Licence, or
* (at your option) any later version.
*
* WinBtrfs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public Licence for more details.
*
* You should have received a copy of the GNU Lesser General Public Licence
* along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
#include "btrfs_drv.h"
#include "crc32c.h"
#if (NTDDI_VERSION >= NTDDI_WIN10)
// not currently in mingw - introduced with Windows 10
#ifndef _MSC_VER
#define FileIdInformation (enum _FILE_INFORMATION_CLASS)59
#define FileHardLinkFullIdInformation (enum _FILE_INFORMATION_CLASS)62
#define FileDispositionInformationEx (enum _FILE_INFORMATION_CLASS)64
#define FileRenameInformationEx (enum _FILE_INFORMATION_CLASS)65
#define FileStatInformation (enum _FILE_INFORMATION_CLASS)68
#define FileStatLxInformation (enum _FILE_INFORMATION_CLASS)70
#define FileCaseSensitiveInformation (enum _FILE_INFORMATION_CLASS)71
#define FileLinkInformationEx (enum _FILE_INFORMATION_CLASS)72
#define FileStorageReserveIdInformation (enum _FILE_INFORMATION_CLASS)74
typedef struct _FILE_ID_INFORMATION {
ULONGLONG VolumeSerialNumber;
FILE_ID_128 FileId;
} FILE_ID_INFORMATION, *PFILE_ID_INFORMATION;
typedef struct _FILE_STAT_INFORMATION {
LARGE_INTEGER FileId;
LARGE_INTEGER CreationTime;
LARGE_INTEGER LastAccessTime;
LARGE_INTEGER LastWriteTime;
LARGE_INTEGER ChangeTime;
LARGE_INTEGER AllocationSize;
LARGE_INTEGER EndOfFile;
ULONG FileAttributes;
ULONG ReparseTag;
ULONG NumberOfLinks;
ACCESS_MASK EffectiveAccess;
} FILE_STAT_INFORMATION, *PFILE_STAT_INFORMATION;
typedef struct _FILE_STAT_LX_INFORMATION {
LARGE_INTEGER FileId;
LARGE_INTEGER CreationTime;
LARGE_INTEGER LastAccessTime;
LARGE_INTEGER LastWriteTime;
LARGE_INTEGER ChangeTime;
LARGE_INTEGER AllocationSize;
LARGE_INTEGER EndOfFile;
ULONG FileAttributes;
ULONG ReparseTag;
ULONG NumberOfLinks;
ACCESS_MASK EffectiveAccess;
ULONG LxFlags;
ULONG LxUid;
ULONG LxGid;
ULONG LxMode;
ULONG LxDeviceIdMajor;
ULONG LxDeviceIdMinor;
} FILE_STAT_LX_INFORMATION, *PFILE_STAT_LX_INFORMATION;
#define LX_FILE_METADATA_HAS_UID 0x01
#define LX_FILE_METADATA_HAS_GID 0x02
#define LX_FILE_METADATA_HAS_MODE 0x04
#define LX_FILE_METADATA_HAS_DEVICE_ID 0x08
#define LX_FILE_CASE_SENSITIVE_DIR 0x10
typedef struct _FILE_RENAME_INFORMATION_EX {
union {
BOOLEAN ReplaceIfExists;
ULONG Flags;
};
HANDLE RootDirectory;
ULONG FileNameLength;
WCHAR FileName[1];
} FILE_RENAME_INFORMATION_EX, *PFILE_RENAME_INFORMATION_EX;
typedef struct _FILE_DISPOSITION_INFORMATION_EX {
ULONG Flags;
} FILE_DISPOSITION_INFORMATION_EX, *PFILE_DISPOSITION_INFORMATION_EX;
typedef struct _FILE_LINK_INFORMATION_EX {
union {
BOOLEAN ReplaceIfExists;
ULONG Flags;
};
HANDLE RootDirectory;
ULONG FileNameLength;
WCHAR FileName[1];
} FILE_LINK_INFORMATION_EX, *PFILE_LINK_INFORMATION_EX;
typedef struct _FILE_CASE_SENSITIVE_INFORMATION {
ULONG Flags;
} FILE_CASE_SENSITIVE_INFORMATION, *PFILE_CASE_SENSITIVE_INFORMATION;
typedef struct _FILE_LINK_ENTRY_FULL_ID_INFORMATION {
ULONG NextEntryOffset;
FILE_ID_128 ParentFileId;
ULONG FileNameLength;
WCHAR FileName[1];
} FILE_LINK_ENTRY_FULL_ID_INFORMATION, *PFILE_LINK_ENTRY_FULL_ID_INFORMATION;
typedef struct _FILE_LINKS_FULL_ID_INFORMATION {
ULONG BytesNeeded;
ULONG EntriesReturned;
FILE_LINK_ENTRY_FULL_ID_INFORMATION Entry;
} FILE_LINKS_FULL_ID_INFORMATION, *PFILE_LINKS_FULL_ID_INFORMATION;
#define FILE_RENAME_REPLACE_IF_EXISTS 0x001
#define FILE_RENAME_POSIX_SEMANTICS 0x002
#define FILE_RENAME_SUPPRESS_PIN_STATE_INHERITANCE 0x004
#define FILE_RENAME_SUPPRESS_STORAGE_RESERVE_INHERITANCE 0x008
#define FILE_RENAME_NO_INCREASE_AVAILABLE_SPACE 0x010
#define FILE_RENAME_NO_DECREASE_AVAILABLE_SPACE 0x020
#define FILE_RENAME_IGNORE_READONLY_ATTRIBUTE 0x040
#define FILE_RENAME_FORCE_RESIZE_TARGET_SR 0x080
#define FILE_RENAME_FORCE_RESIZE_SOURCE_SR 0x100
#define FILE_DISPOSITION_DELETE 0x1
#define FILE_DISPOSITION_POSIX_SEMANTICS 0x2
#define FILE_DISPOSITION_FORCE_IMAGE_SECTION_CHECK 0x4
#define FILE_DISPOSITION_ON_CLOSE 0x8
#define FILE_LINK_REPLACE_IF_EXISTS 0x001
#define FILE_LINK_POSIX_SEMANTICS 0x002
#define FILE_LINK_SUPPRESS_STORAGE_RESERVE_INHERITANCE 0x008
#define FILE_LINK_NO_INCREASE_AVAILABLE_SPACE 0x010
#define FILE_LINK_NO_DECREASE_AVAILABLE_SPACE 0x020
#define FILE_LINK_IGNORE_READONLY_ATTRIBUTE 0x040
#define FILE_LINK_FORCE_RESIZE_TARGET_SR 0x080
#define FILE_LINK_FORCE_RESIZE_SOURCE_SR 0x100
#else
#define FILE_RENAME_INFORMATION_EX FILE_RENAME_INFORMATION
#define FILE_LINK_INFORMATION_EX FILE_LINK_INFORMATION
#endif
#endif
#ifdef __REACTOS__
typedef struct _FILE_RENAME_INFORMATION_EX {
union {
BOOLEAN ReplaceIfExists;
ULONG Flags;
};
HANDLE RootDirectory;
ULONG FileNameLength;
WCHAR FileName[1];
} FILE_RENAME_INFORMATION_EX, *PFILE_RENAME_INFORMATION_EX;
typedef struct _FILE_DISPOSITION_INFORMATION_EX {
ULONG Flags;
} FILE_DISPOSITION_INFORMATION_EX, *PFILE_DISPOSITION_INFORMATION_EX;
typedef struct _FILE_LINK_INFORMATION_EX {
union {
BOOLEAN ReplaceIfExists;
ULONG Flags;
};
HANDLE RootDirectory;
ULONG FileNameLength;
WCHAR FileName[1];
} FILE_LINK_INFORMATION_EX, *PFILE_LINK_INFORMATION_EX;
#define FILE_RENAME_REPLACE_IF_EXISTS 0x001
#define FILE_RENAME_POSIX_SEMANTICS 0x002
#define FILE_RENAME_IGNORE_READONLY_ATTRIBUTE 0x040
#define FILE_DISPOSITION_DELETE 0x1
#define FILE_DISPOSITION_POSIX_SEMANTICS 0x2
#define FILE_DISPOSITION_FORCE_IMAGE_SECTION_CHECK 0x4
#define FILE_LINK_REPLACE_IF_EXISTS 0x001
#define FILE_LINK_POSIX_SEMANTICS 0x002
#define FILE_LINK_IGNORE_READONLY_ATTRIBUTE 0x040
#endif
static NTSTATUS set_basic_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject) {
FILE_BASIC_INFORMATION* fbi = Irp->AssociatedIrp.SystemBuffer;
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref* fileref = ccb ? ccb->fileref : NULL;
ULONG defda, filter = 0;
bool inode_item_changed = false;
NTSTATUS Status;
if (fcb->ads) {
if (fileref && fileref->parent)
fcb = fileref->parent->fcb;
else {
ERR("stream did not have fileref\n");
return STATUS_INTERNAL_ERROR;
}
}
if (!ccb) {
ERR("ccb was NULL\n");
return STATUS_INVALID_PARAMETER;
}
TRACE("file = %p, attributes = %lx\n", FileObject, fbi->FileAttributes);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fbi->FileAttributes & FILE_ATTRIBUTE_DIRECTORY && fcb->type != BTRFS_TYPE_DIRECTORY) {
WARN("attempted to set FILE_ATTRIBUTE_DIRECTORY on non-directory\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (fcb->inode == SUBVOL_ROOT_INODE && is_subvol_readonly(fcb->subvol, Irp) &&
(fbi->FileAttributes == 0 || fbi->FileAttributes & FILE_ATTRIBUTE_READONLY)) {
Status = STATUS_ACCESS_DENIED;
goto end;
}
// don't allow readonly subvol to be made r/w if send operation running on it
if (fcb->inode == SUBVOL_ROOT_INODE && fcb->subvol->root_item.flags & BTRFS_SUBVOL_READONLY &&
fcb->subvol->send_ops > 0) {
Status = STATUS_DEVICE_NOT_READY;
goto end;
}
// times of -2 are some sort of undocumented behaviour to do with LXSS
if (fbi->CreationTime.QuadPart == -2)
fbi->CreationTime.QuadPart = 0;
if (fbi->LastAccessTime.QuadPart == -2)
fbi->LastAccessTime.QuadPart = 0;
if (fbi->LastWriteTime.QuadPart == -2)
fbi->LastWriteTime.QuadPart = 0;
if (fbi->ChangeTime.QuadPart == -2)
fbi->ChangeTime.QuadPart = 0;
if (fbi->CreationTime.QuadPart == -1)
ccb->user_set_creation_time = true;
else if (fbi->CreationTime.QuadPart != 0) {
win_time_to_unix(fbi->CreationTime, &fcb->inode_item.otime);
inode_item_changed = true;
filter |= FILE_NOTIFY_CHANGE_CREATION;
ccb->user_set_creation_time = true;
}
if (fbi->LastAccessTime.QuadPart == -1)
ccb->user_set_access_time = true;
else if (fbi->LastAccessTime.QuadPart != 0) {
win_time_to_unix(fbi->LastAccessTime, &fcb->inode_item.st_atime);
inode_item_changed = true;
filter |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
ccb->user_set_access_time = true;
}
if (fbi->LastWriteTime.QuadPart == -1)
ccb->user_set_write_time = true;
else if (fbi->LastWriteTime.QuadPart != 0) {
win_time_to_unix(fbi->LastWriteTime, &fcb->inode_item.st_mtime);
inode_item_changed = true;
filter |= FILE_NOTIFY_CHANGE_LAST_WRITE;
ccb->user_set_write_time = true;
}
if (fbi->ChangeTime.QuadPart == -1)
ccb->user_set_change_time = true;
else if (fbi->ChangeTime.QuadPart != 0) {
win_time_to_unix(fbi->ChangeTime, &fcb->inode_item.st_ctime);
inode_item_changed = true;
// no filter for this
ccb->user_set_change_time = true;
}
// FileAttributes == 0 means don't set - undocumented, but seen in fastfat
if (fbi->FileAttributes != 0) {
LARGE_INTEGER time;
BTRFS_TIME now;
fbi->FileAttributes &= ~FILE_ATTRIBUTE_NORMAL;
defda = get_file_attributes(Vcb, fcb->subvol, fcb->inode, fcb->type, fileref && fileref->dc && fileref->dc->name.Length >= sizeof(WCHAR) && fileref->dc->name.Buffer[0] == '.',
true, Irp);
if (fcb->type == BTRFS_TYPE_DIRECTORY)
fbi->FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
else if (fcb->type == BTRFS_TYPE_SYMLINK)
fbi->FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
fcb->atts_changed = true;
if (fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT)
fbi->FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
if (defda == fbi->FileAttributes)
fcb->atts_deleted = true;
else if (fcb->inode == SUBVOL_ROOT_INODE && (defda | FILE_ATTRIBUTE_READONLY) == (fbi->FileAttributes | FILE_ATTRIBUTE_READONLY))
fcb->atts_deleted = true;
fcb->atts = fbi->FileAttributes;
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
if (!ccb->user_set_change_time)
fcb->inode_item.st_ctime = now;
fcb->subvol->root_item.ctransid = Vcb->superblock.generation;
fcb->subvol->root_item.ctime = now;
if (fcb->inode == SUBVOL_ROOT_INODE) {
if (fbi->FileAttributes & FILE_ATTRIBUTE_READONLY)
fcb->subvol->root_item.flags |= BTRFS_SUBVOL_READONLY;
else
fcb->subvol->root_item.flags &= ~BTRFS_SUBVOL_READONLY;
}
inode_item_changed = true;
filter |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
}
if (inode_item_changed) {
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.sequence++;
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
}
if (filter != 0)
queue_notification_fcb(fileref, filter, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end:
ExReleaseResourceLite(fcb->Header.Resource);
return Status;
}
static NTSTATUS set_disposition_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject, bool ex) {
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref* fileref = ccb ? ccb->fileref : NULL;
ULONG atts, flags;
NTSTATUS Status;
if (!fileref)
return STATUS_INVALID_PARAMETER;
if (ex) {
FILE_DISPOSITION_INFORMATION_EX* fdi = Irp->AssociatedIrp.SystemBuffer;
flags = fdi->Flags;
} else {
FILE_DISPOSITION_INFORMATION* fdi = Irp->AssociatedIrp.SystemBuffer;
flags = fdi->DeleteFile ? FILE_DISPOSITION_DELETE : 0;
}
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
TRACE("changing delete_on_close to %s for fcb %p\n", flags & FILE_DISPOSITION_DELETE ? "true" : "false", fcb);
if (fcb->ads) {
if (fileref->parent)
atts = fileref->parent->fcb->atts;
else {
ERR("no fileref for stream\n");
Status = STATUS_INTERNAL_ERROR;
goto end;
}
} else
atts = fcb->atts;
TRACE("atts = %lx\n", atts);
if (atts & FILE_ATTRIBUTE_READONLY) {
TRACE("not allowing readonly file to be deleted\n");
Status = STATUS_CANNOT_DELETE;
goto end;
}
if (fcb->inode == SUBVOL_ROOT_INODE && fcb->subvol->id == BTRFS_ROOT_FSTREE) {
WARN("not allowing \\$Root to be deleted\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
// FIXME - can we skip this bit for subvols?
if (fcb->type == BTRFS_TYPE_DIRECTORY && fcb->inode_item.st_size > 0 && (!fileref || fileref->fcb != Vcb->dummy_fcb)) {
TRACE("directory not empty\n");
Status = STATUS_DIRECTORY_NOT_EMPTY;
goto end;
}
if (!MmFlushImageSection(&fcb->nonpaged->segment_object, MmFlushForDelete)) {
if (!ex || flags & FILE_DISPOSITION_FORCE_IMAGE_SECTION_CHECK) {
TRACE("trying to delete file which is being mapped as an image\n");
Status = STATUS_CANNOT_DELETE;
goto end;
}
}
ccb->fileref->delete_on_close = flags & FILE_DISPOSITION_DELETE;
FileObject->DeletePending = flags & FILE_DISPOSITION_DELETE;
if (flags & FILE_DISPOSITION_DELETE && flags & FILE_DISPOSITION_POSIX_SEMANTICS)
ccb->fileref->posix_delete = true;
Status = STATUS_SUCCESS;
end:
ExReleaseResourceLite(fcb->Header.Resource);
// send notification that directory is about to be deleted
if (NT_SUCCESS(Status) && flags & FILE_DISPOSITION_DELETE && fcb->type == BTRFS_TYPE_DIRECTORY) {
FsRtlNotifyFullChangeDirectory(Vcb->NotifySync, &Vcb->DirNotifyList, FileObject->FsContext,
NULL, false, false, 0, NULL, NULL, NULL);
}
return Status;
}
bool has_open_children(file_ref* fileref) {
LIST_ENTRY* le = fileref->children.Flink;
if (IsListEmpty(&fileref->children))
return false;
while (le != &fileref->children) {
file_ref* c = CONTAINING_RECORD(le, file_ref, list_entry);
if (c->open_count > 0)
return true;
if (has_open_children(c))
return true;
le = le->Flink;
}
return false;
}
static NTSTATUS duplicate_fcb(fcb* oldfcb, fcb** pfcb) {
device_extension* Vcb = oldfcb->Vcb;
fcb* fcb;
LIST_ENTRY* le;
// FIXME - we can skip a lot of this if the inode is about to be deleted
fcb = create_fcb(Vcb, PagedPool); // FIXME - what if we duplicate the paging file?
if (!fcb) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
fcb->Vcb = Vcb;
fcb->Header.IsFastIoPossible = fast_io_possible(fcb);
fcb->Header.AllocationSize = oldfcb->Header.AllocationSize;
fcb->Header.FileSize = oldfcb->Header.FileSize;
fcb->Header.ValidDataLength = oldfcb->Header.ValidDataLength;
fcb->type = oldfcb->type;
if (oldfcb->ads) {
fcb->ads = true;
fcb->adshash = oldfcb->adshash;
fcb->adsmaxlen = oldfcb->adsmaxlen;
if (oldfcb->adsxattr.Buffer && oldfcb->adsxattr.Length > 0) {
fcb->adsxattr.Length = oldfcb->adsxattr.Length;
fcb->adsxattr.MaximumLength = fcb->adsxattr.Length + 1;
fcb->adsxattr.Buffer = ExAllocatePoolWithTag(PagedPool, fcb->adsxattr.MaximumLength, ALLOC_TAG);
if (!fcb->adsxattr.Buffer) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(fcb->adsxattr.Buffer, oldfcb->adsxattr.Buffer, fcb->adsxattr.Length);
fcb->adsxattr.Buffer[fcb->adsxattr.Length] = 0;
}
if (oldfcb->adsdata.Buffer && oldfcb->adsdata.Length > 0) {
fcb->adsdata.Length = fcb->adsdata.MaximumLength = oldfcb->adsdata.Length;
fcb->adsdata.Buffer = ExAllocatePoolWithTag(PagedPool, fcb->adsdata.MaximumLength, ALLOC_TAG);
if (!fcb->adsdata.Buffer) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(fcb->adsdata.Buffer, oldfcb->adsdata.Buffer, fcb->adsdata.Length);
}
goto end;
}
RtlCopyMemory(&fcb->inode_item, &oldfcb->inode_item, sizeof(INODE_ITEM));
fcb->inode_item_changed = true;
if (oldfcb->sd && RtlLengthSecurityDescriptor(oldfcb->sd) > 0) {
fcb->sd = ExAllocatePoolWithTag(PagedPool, RtlLengthSecurityDescriptor(oldfcb->sd), ALLOC_TAG);
if (!fcb->sd) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(fcb->sd, oldfcb->sd, RtlLengthSecurityDescriptor(oldfcb->sd));
}
fcb->atts = oldfcb->atts;
le = oldfcb->extents.Flink;
while (le != &oldfcb->extents) {
extent* ext = CONTAINING_RECORD(le, extent, list_entry);
if (!ext->ignore) {
extent* ext2 = ExAllocatePoolWithTag(PagedPool, offsetof(extent, extent_data) + ext->datalen, ALLOC_TAG);
if (!ext2) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
ext2->offset = ext->offset;
ext2->datalen = ext->datalen;
if (ext2->datalen > 0)
RtlCopyMemory(&ext2->extent_data, &ext->extent_data, ext2->datalen);
ext2->unique = false;
ext2->ignore = false;
ext2->inserted = true;
if (ext->csum) {
ULONG len;
EXTENT_DATA2* ed2 = (EXTENT_DATA2*)ext->extent_data.data;
if (ext->extent_data.compression == BTRFS_COMPRESSION_NONE)
len = (ULONG)ed2->num_bytes;
else
len = (ULONG)ed2->size;
len = len * sizeof(uint32_t) / Vcb->superblock.sector_size;
ext2->csum = ExAllocatePoolWithTag(PagedPool, len, ALLOC_TAG);
if (!ext2->csum) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(ext2->csum, ext->csum, len);
} else
ext2->csum = NULL;
InsertTailList(&fcb->extents, &ext2->list_entry);
}
le = le->Flink;
}
le = oldfcb->hardlinks.Flink;
while (le != &oldfcb->hardlinks) {
hardlink *hl = CONTAINING_RECORD(le, hardlink, list_entry), *hl2;
hl2 = ExAllocatePoolWithTag(PagedPool, sizeof(hardlink), ALLOC_TAG);
if (!hl2) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
hl2->parent = hl->parent;
hl2->index = hl->index;
hl2->name.Length = hl2->name.MaximumLength = hl->name.Length;
hl2->name.Buffer = ExAllocatePoolWithTag(PagedPool, hl2->name.MaximumLength, ALLOC_TAG);
if (!hl2->name.Buffer) {
ERR("out of memory\n");
ExFreePool(hl2);
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(hl2->name.Buffer, hl->name.Buffer, hl->name.Length);
hl2->utf8.Length = hl2->utf8.MaximumLength = hl->utf8.Length;
hl2->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, hl2->utf8.MaximumLength, ALLOC_TAG);
if (!hl2->utf8.Buffer) {
ERR("out of memory\n");
ExFreePool(hl2->name.Buffer);
ExFreePool(hl2);
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(hl2->utf8.Buffer, hl->utf8.Buffer, hl->utf8.Length);
InsertTailList(&fcb->hardlinks, &hl2->list_entry);
le = le->Flink;
}
if (oldfcb->reparse_xattr.Buffer && oldfcb->reparse_xattr.Length > 0) {
fcb->reparse_xattr.Length = fcb->reparse_xattr.MaximumLength = oldfcb->reparse_xattr.Length;
fcb->reparse_xattr.Buffer = ExAllocatePoolWithTag(PagedPool, fcb->reparse_xattr.MaximumLength, ALLOC_TAG);
if (!fcb->reparse_xattr.Buffer) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(fcb->reparse_xattr.Buffer, oldfcb->reparse_xattr.Buffer, fcb->reparse_xattr.Length);
}
if (oldfcb->ea_xattr.Buffer && oldfcb->ea_xattr.Length > 0) {
fcb->ea_xattr.Length = fcb->ea_xattr.MaximumLength = oldfcb->ea_xattr.Length;
fcb->ea_xattr.Buffer = ExAllocatePoolWithTag(PagedPool, fcb->ea_xattr.MaximumLength, ALLOC_TAG);
if (!fcb->ea_xattr.Buffer) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(fcb->ea_xattr.Buffer, oldfcb->ea_xattr.Buffer, fcb->ea_xattr.Length);
}
fcb->prop_compression = oldfcb->prop_compression;
le = oldfcb->xattrs.Flink;
while (le != &oldfcb->xattrs) {
xattr* xa = CONTAINING_RECORD(le, xattr, list_entry);
if (xa->valuelen > 0) {
xattr* xa2;
xa2 = ExAllocatePoolWithTag(PagedPool, offsetof(xattr, data[0]) + xa->namelen + xa->valuelen, ALLOC_TAG);
if (!xa2) {
ERR("out of memory\n");
free_fcb(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
xa2->namelen = xa->namelen;
xa2->valuelen = xa->valuelen;
xa2->dirty = xa->dirty;
memcpy(xa2->data, xa->data, xa->namelen + xa->valuelen);
InsertTailList(&fcb->xattrs, &xa2->list_entry);
}
le = le->Flink;
}
end:
*pfcb = fcb;
return STATUS_SUCCESS;
}
typedef struct _move_entry {
file_ref* fileref;
fcb* dummyfcb;
file_ref* dummyfileref;
struct _move_entry* parent;
LIST_ENTRY list_entry;
} move_entry;
static NTSTATUS add_children_to_move_list(device_extension* Vcb, move_entry* me, PIRP Irp) {
NTSTATUS Status;
LIST_ENTRY* le;
ExAcquireResourceSharedLite(&me->fileref->fcb->nonpaged->dir_children_lock, true);
le = me->fileref->fcb->dir_children_index.Flink;
while (le != &me->fileref->fcb->dir_children_index) {
dir_child* dc = CONTAINING_RECORD(le, dir_child, list_entry_index);
file_ref* fr;
move_entry* me2;
Status = open_fileref_child(Vcb, me->fileref, &dc->name, true, true, dc->index == 0 ? true : false, PagedPool, &fr, Irp);
if (!NT_SUCCESS(Status)) {
ERR("open_fileref_child returned %08lx\n", Status);
ExReleaseResourceLite(&me->fileref->fcb->nonpaged->dir_children_lock);
return Status;
}
me2 = ExAllocatePoolWithTag(PagedPool, sizeof(move_entry), ALLOC_TAG);
if (!me2) {
ERR("out of memory\n");
ExReleaseResourceLite(&me->fileref->fcb->nonpaged->dir_children_lock);
return STATUS_INSUFFICIENT_RESOURCES;
}
me2->fileref = fr;
me2->dummyfcb = NULL;
me2->dummyfileref = NULL;
me2->parent = me;
InsertHeadList(&me->list_entry, &me2->list_entry);
le = le->Flink;
}
ExReleaseResourceLite(&me->fileref->fcb->nonpaged->dir_children_lock);
return STATUS_SUCCESS;
}
void remove_dir_child_from_hash_lists(fcb* fcb, dir_child* dc) {
uint8_t c;
c = dc->hash >> 24;
if (fcb->hash_ptrs[c] == &dc->list_entry_hash) {
if (dc->list_entry_hash.Flink == &fcb->dir_children_hash)
fcb->hash_ptrs[c] = NULL;
else {
dir_child* dc2 = CONTAINING_RECORD(dc->list_entry_hash.Flink, dir_child, list_entry_hash);
if (dc2->hash >> 24 == c)
fcb->hash_ptrs[c] = &dc2->list_entry_hash;
else
fcb->hash_ptrs[c] = NULL;
}
}
RemoveEntryList(&dc->list_entry_hash);
c = dc->hash_uc >> 24;
if (fcb->hash_ptrs_uc[c] == &dc->list_entry_hash_uc) {
if (dc->list_entry_hash_uc.Flink == &fcb->dir_children_hash_uc)
fcb->hash_ptrs_uc[c] = NULL;
else {
dir_child* dc2 = CONTAINING_RECORD(dc->list_entry_hash_uc.Flink, dir_child, list_entry_hash_uc);
if (dc2->hash_uc >> 24 == c)
fcb->hash_ptrs_uc[c] = &dc2->list_entry_hash_uc;
else
fcb->hash_ptrs_uc[c] = NULL;
}
}
RemoveEntryList(&dc->list_entry_hash_uc);
}
static NTSTATUS create_directory_fcb(device_extension* Vcb, root* r, fcb* parfcb, fcb** pfcb) {
NTSTATUS Status;
fcb* fcb;
SECURITY_SUBJECT_CONTEXT subjcont;
PSID owner;
BOOLEAN defaulted;
LARGE_INTEGER time;
BTRFS_TIME now;
fcb = create_fcb(Vcb, PagedPool);
if (!fcb) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
fcb->Vcb = Vcb;
fcb->subvol = r;
fcb->inode = InterlockedIncrement64(&r->lastinode);
fcb->type = BTRFS_TYPE_DIRECTORY;
fcb->inode_item.generation = Vcb->superblock.generation;
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.st_nlink = 1;
fcb->inode_item.st_mode = __S_IFDIR | inherit_mode(parfcb, true);
fcb->inode_item.st_atime = fcb->inode_item.st_ctime = fcb->inode_item.st_mtime = fcb->inode_item.otime = now;
fcb->inode_item.st_gid = GID_NOBODY;
fcb->atts = get_file_attributes(Vcb, fcb->subvol, fcb->inode, fcb->type, false, true, NULL);
SeCaptureSubjectContext(&subjcont);
Status = SeAssignSecurity(parfcb->sd, NULL, (void**)&fcb->sd, true, &subjcont, IoGetFileObjectGenericMapping(), PagedPool);
if (!NT_SUCCESS(Status)) {
reap_fcb(fcb);
ERR("SeAssignSecurity returned %08lx\n", Status);
return Status;
}
if (!fcb->sd) {
reap_fcb(fcb);
ERR("SeAssignSecurity returned NULL security descriptor\n");
return STATUS_INTERNAL_ERROR;
}
Status = RtlGetOwnerSecurityDescriptor(fcb->sd, &owner, &defaulted);
if (!NT_SUCCESS(Status)) {
ERR("RtlGetOwnerSecurityDescriptor returned %08lx\n", Status);
fcb->inode_item.st_uid = UID_NOBODY;
fcb->sd_dirty = true;
} else {
fcb->inode_item.st_uid = sid_to_uid(owner);
fcb->sd_dirty = fcb->inode_item.st_uid == UID_NOBODY;
}
find_gid(fcb, parfcb, &subjcont);
fcb->inode_item_changed = true;
fcb->Header.IsFastIoPossible = fast_io_possible(fcb);
fcb->Header.AllocationSize.QuadPart = 0;
fcb->Header.FileSize.QuadPart = 0;
fcb->Header.ValidDataLength.QuadPart = 0;
fcb->created = true;
if (parfcb->inode_item.flags & BTRFS_INODE_COMPRESS)
fcb->inode_item.flags |= BTRFS_INODE_COMPRESS;
fcb->prop_compression = parfcb->prop_compression;
fcb->prop_compression_changed = fcb->prop_compression != PropCompression_None;
fcb->hash_ptrs = ExAllocatePoolWithTag(PagedPool, sizeof(LIST_ENTRY*) * 256, ALLOC_TAG);
if (!fcb->hash_ptrs) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(fcb->hash_ptrs, sizeof(LIST_ENTRY*) * 256);
fcb->hash_ptrs_uc = ExAllocatePoolWithTag(PagedPool, sizeof(LIST_ENTRY*) * 256, ALLOC_TAG);
if (!fcb->hash_ptrs_uc) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(fcb->hash_ptrs_uc, sizeof(LIST_ENTRY*) * 256);
acquire_fcb_lock_exclusive(Vcb);
InsertTailList(&r->fcbs, &fcb->list_entry);
InsertTailList(&Vcb->all_fcbs, &fcb->list_entry_all);
r->fcbs_version++;
release_fcb_lock(Vcb);
mark_fcb_dirty(fcb);
*pfcb = fcb;
return STATUS_SUCCESS;
}
static NTSTATUS move_across_subvols(file_ref* fileref, ccb* ccb, file_ref* destdir, PANSI_STRING utf8, PUNICODE_STRING fnus, PIRP Irp, LIST_ENTRY* rollback) {
NTSTATUS Status;
LIST_ENTRY move_list, *le;
move_entry* me;
LARGE_INTEGER time;
BTRFS_TIME now;
file_ref* origparent;
// FIXME - make sure me->dummyfileref and me->dummyfcb get freed properly
InitializeListHead(&move_list);
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
acquire_fcb_lock_exclusive(fileref->fcb->Vcb);
me = ExAllocatePoolWithTag(PagedPool, sizeof(move_entry), ALLOC_TAG);
if (!me) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
origparent = fileref->parent;
me->fileref = fileref;
increase_fileref_refcount(me->fileref);
me->dummyfcb = NULL;
me->dummyfileref = NULL;
me->parent = NULL;
InsertTailList(&move_list, &me->list_entry);
le = move_list.Flink;
while (le != &move_list) {
me = CONTAINING_RECORD(le, move_entry, list_entry);
ExAcquireResourceSharedLite(me->fileref->fcb->Header.Resource, true);
if (!me->fileref->fcb->ads && me->fileref->fcb->subvol == origparent->fcb->subvol) {
Status = add_children_to_move_list(fileref->fcb->Vcb, me, Irp);
if (!NT_SUCCESS(Status)) {
ERR("add_children_to_move_list returned %08lx\n", Status);
goto end;
}
}
ExReleaseResourceLite(me->fileref->fcb->Header.Resource);
le = le->Flink;
}
send_notification_fileref(fileref, fileref->fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_REMOVED, NULL);
// loop through list and create new inodes
le = move_list.Flink;
while (le != &move_list) {
me = CONTAINING_RECORD(le, move_entry, list_entry);
if (me->fileref->fcb->inode != SUBVOL_ROOT_INODE && me->fileref->fcb != fileref->fcb->Vcb->dummy_fcb) {
if (!me->dummyfcb) {
ULONG defda;
bool inserted = false;
LIST_ENTRY* le3;
ExAcquireResourceExclusiveLite(me->fileref->fcb->Header.Resource, true);
Status = duplicate_fcb(me->fileref->fcb, &me->dummyfcb);
if (!NT_SUCCESS(Status)) {
ERR("duplicate_fcb returned %08lx\n", Status);
ExReleaseResourceLite(me->fileref->fcb->Header.Resource);
goto end;
}
me->dummyfcb->subvol = me->fileref->fcb->subvol;
me->dummyfcb->inode = me->fileref->fcb->inode;
if (!me->dummyfcb->ads) {
me->dummyfcb->sd_dirty = me->fileref->fcb->sd_dirty;
me->dummyfcb->atts_changed = me->fileref->fcb->atts_changed;
me->dummyfcb->atts_deleted = me->fileref->fcb->atts_deleted;
me->dummyfcb->extents_changed = me->fileref->fcb->extents_changed;
me->dummyfcb->reparse_xattr_changed = me->fileref->fcb->reparse_xattr_changed;
me->dummyfcb->ea_changed = me->fileref->fcb->ea_changed;
}
me->dummyfcb->created = me->fileref->fcb->created;
me->dummyfcb->deleted = me->fileref->fcb->deleted;
mark_fcb_dirty(me->dummyfcb);
if (!me->fileref->fcb->ads) {
LIST_ENTRY* le2;
me->fileref->fcb->subvol = destdir->fcb->subvol;
me->fileref->fcb->inode = InterlockedIncrement64(&destdir->fcb->subvol->lastinode);
me->fileref->fcb->inode_item.st_nlink = 1;
defda = get_file_attributes(me->fileref->fcb->Vcb, me->fileref->fcb->subvol, me->fileref->fcb->inode,
me->fileref->fcb->type, me->fileref->dc && me->fileref->dc->name.Length >= sizeof(WCHAR) && me->fileref->dc->name.Buffer[0] == '.',
true, Irp);
me->fileref->fcb->sd_dirty = !!me->fileref->fcb->sd;
me->fileref->fcb->atts_changed = defda != me->fileref->fcb->atts;
me->fileref->fcb->extents_changed = !IsListEmpty(&me->fileref->fcb->extents);
me->fileref->fcb->reparse_xattr_changed = !!me->fileref->fcb->reparse_xattr.Buffer;
me->fileref->fcb->ea_changed = !!me->fileref->fcb->ea_xattr.Buffer;
me->fileref->fcb->xattrs_changed = !IsListEmpty(&me->fileref->fcb->xattrs);
me->fileref->fcb->inode_item_changed = true;
le2 = me->fileref->fcb->xattrs.Flink;
while (le2 != &me->fileref->fcb->xattrs) {
xattr* xa = CONTAINING_RECORD(le2, xattr, list_entry);
xa->dirty = true;
le2 = le2->Flink;
}
if (le == move_list.Flink) { // first entry
me->fileref->fcb->inode_item.transid = me->fileref->fcb->Vcb->superblock.generation;
me->fileref->fcb->inode_item.sequence++;
if (!ccb->user_set_change_time)
me->fileref->fcb->inode_item.st_ctime = now;
}
le2 = me->fileref->fcb->extents.Flink;
while (le2 != &me->fileref->fcb->extents) {
extent* ext = CONTAINING_RECORD(le2, extent, list_entry);
if (!ext->ignore && (ext->extent_data.type == EXTENT_TYPE_REGULAR || ext->extent_data.type == EXTENT_TYPE_PREALLOC)) {
EXTENT_DATA2* ed2 = (EXTENT_DATA2*)ext->extent_data.data;
if (ed2->size != 0) {
chunk* c = get_chunk_from_address(me->fileref->fcb->Vcb, ed2->address);
if (!c) {
ERR("get_chunk_from_address(%I64x) failed\n", ed2->address);
} else {
Status = update_changed_extent_ref(me->fileref->fcb->Vcb, c, ed2->address, ed2->size, me->fileref->fcb->subvol->id, me->fileref->fcb->inode,
ext->offset - ed2->offset, 1, me->fileref->fcb->inode_item.flags & BTRFS_INODE_NODATASUM, false, Irp);
if (!NT_SUCCESS(Status)) {
ERR("update_changed_extent_ref returned %08lx\n", Status);
ExReleaseResourceLite(me->fileref->fcb->Header.Resource);
goto end;
}
}
}
}
le2 = le2->Flink;
}
} else {
me->fileref->fcb->subvol = me->parent->fileref->fcb->subvol;
me->fileref->fcb->inode = me->parent->fileref->fcb->inode;
}
me->fileref->fcb->created = true;
InsertHeadList(&me->fileref->fcb->list_entry, &me->dummyfcb->list_entry);
RemoveEntryList(&me->fileref->fcb->list_entry);
le3 = destdir->fcb->subvol->fcbs.Flink;
while (le3 != &destdir->fcb->subvol->fcbs) {
fcb* fcb = CONTAINING_RECORD(le3, struct _fcb, list_entry);
if (fcb->inode > me->fileref->fcb->inode) {
InsertHeadList(le3->Blink, &me->fileref->fcb->list_entry);
inserted = true;
break;
}
le3 = le3->Flink;
}
if (!inserted)
InsertTailList(&destdir->fcb->subvol->fcbs, &me->fileref->fcb->list_entry);
InsertTailList(&me->fileref->fcb->Vcb->all_fcbs, &me->dummyfcb->list_entry_all);
while (!IsListEmpty(&me->fileref->fcb->hardlinks)) {
hardlink* hl = CONTAINING_RECORD(RemoveHeadList(&me->fileref->fcb->hardlinks), hardlink, list_entry);
if (hl->name.Buffer)
ExFreePool(hl->name.Buffer);
if (hl->utf8.Buffer)
ExFreePool(hl->utf8.Buffer);
ExFreePool(hl);
}
me->fileref->fcb->inode_item_changed = true;
mark_fcb_dirty(me->fileref->fcb);
if ((!me->dummyfcb->ads && me->dummyfcb->inode_item.st_nlink > 1) || (me->dummyfcb->ads && me->parent->dummyfcb->inode_item.st_nlink > 1)) {
LIST_ENTRY* le2 = le->Flink;
while (le2 != &move_list) {
move_entry* me2 = CONTAINING_RECORD(le2, move_entry, list_entry);
if (me2->fileref->fcb == me->fileref->fcb && !me2->fileref->fcb->ads) {
me2->dummyfcb = me->dummyfcb;
InterlockedIncrement(&me->dummyfcb->refcount);
}
le2 = le2->Flink;
}
}
ExReleaseResourceLite(me->fileref->fcb->Header.Resource);
} else {
ExAcquireResourceExclusiveLite(me->fileref->fcb->Header.Resource, true);
me->fileref->fcb->inode_item.st_nlink++;
me->fileref->fcb->inode_item_changed = true;
ExReleaseResourceLite(me->fileref->fcb->Header.Resource);
}
}
le = le->Flink;
}
fileref->fcb->subvol->root_item.ctransid = fileref->fcb->Vcb->superblock.generation;
fileref->fcb->subvol->root_item.ctime = now;
// loop through list and create new filerefs
le = move_list.Flink;
while (le != &move_list) {
hardlink* hl;
bool name_changed = false;
me = CONTAINING_RECORD(le, move_entry, list_entry);
me->dummyfileref = create_fileref(fileref->fcb->Vcb);
if (!me->dummyfileref) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
if (me->fileref->fcb == me->fileref->fcb->Vcb->dummy_fcb) {
root* r = me->parent ? me->parent->fileref->fcb->subvol : destdir->fcb->subvol;
Status = create_directory_fcb(me->fileref->fcb->Vcb, r, me->fileref->parent->fcb, &me->fileref->fcb);
if (!NT_SUCCESS(Status)) {
ERR("create_directory_fcb returned %08lx\n", Status);
goto end;
}
me->fileref->dc->key.obj_id = me->fileref->fcb->inode;
me->fileref->dc->key.obj_type = TYPE_INODE_ITEM;
me->dummyfileref->fcb = me->fileref->fcb->Vcb->dummy_fcb;
} else if (me->fileref->fcb->inode == SUBVOL_ROOT_INODE) {
me->dummyfileref->fcb = me->fileref->fcb;
me->fileref->fcb->subvol->parent = le == move_list.Flink ? destdir->fcb->subvol->id : me->parent->fileref->fcb->subvol->id;
} else
me->dummyfileref->fcb = me->dummyfcb;
InterlockedIncrement(&me->dummyfileref->fcb->refcount);
me->dummyfileref->oldutf8 = me->fileref->oldutf8;
me->dummyfileref->oldindex = me->fileref->dc->index;
if (le == move_list.Flink && (me->fileref->dc->utf8.Length != utf8->Length || RtlCompareMemory(me->fileref->dc->utf8.Buffer, utf8->Buffer, utf8->Length) != utf8->Length))
name_changed = true;
if ((le == move_list.Flink || me->fileref->fcb->inode == SUBVOL_ROOT_INODE) && !me->dummyfileref->oldutf8.Buffer) {
me->dummyfileref->oldutf8.Buffer = ExAllocatePoolWithTag(PagedPool, me->fileref->dc->utf8.Length, ALLOC_TAG);
if (!me->dummyfileref->oldutf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(me->dummyfileref->oldutf8.Buffer, me->fileref->dc->utf8.Buffer, me->fileref->dc->utf8.Length);
me->dummyfileref->oldutf8.Length = me->dummyfileref->oldutf8.MaximumLength = me->fileref->dc->utf8.Length;
}
me->dummyfileref->delete_on_close = me->fileref->delete_on_close;
me->dummyfileref->deleted = me->fileref->deleted;
me->dummyfileref->created = me->fileref->created;
me->fileref->created = true;
me->dummyfileref->parent = me->parent ? me->parent->dummyfileref : origparent;
increase_fileref_refcount(me->dummyfileref->parent);
ExAcquireResourceExclusiveLite(&me->dummyfileref->parent->fcb->nonpaged->dir_children_lock, true);
InsertTailList(&me->dummyfileref->parent->children, &me->dummyfileref->list_entry);
ExReleaseResourceLite(&me->dummyfileref->parent->fcb->nonpaged->dir_children_lock);
if (me->dummyfileref->fcb->type == BTRFS_TYPE_DIRECTORY)
me->dummyfileref->fcb->fileref = me->dummyfileref;
if (!me->parent) {
RemoveEntryList(&me->fileref->list_entry);
increase_fileref_refcount(destdir);
if (me->fileref->dc) {
// remove from old parent
ExAcquireResourceExclusiveLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock, true);
RemoveEntryList(&me->fileref->dc->list_entry_index);
remove_dir_child_from_hash_lists(me->fileref->parent->fcb, me->fileref->dc);
ExReleaseResourceLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock);
me->fileref->parent->fcb->inode_item.st_size -= me->fileref->dc->utf8.Length * 2;
me->fileref->parent->fcb->inode_item.transid = me->fileref->fcb->Vcb->superblock.generation;
me->fileref->parent->fcb->inode_item.sequence++;
me->fileref->parent->fcb->inode_item.st_ctime = now;
me->fileref->parent->fcb->inode_item.st_mtime = now;
me->fileref->parent->fcb->inode_item_changed = true;
mark_fcb_dirty(me->fileref->parent->fcb);
if (name_changed) {
ExFreePool(me->fileref->dc->utf8.Buffer);
ExFreePool(me->fileref->dc->name.Buffer);
ExFreePool(me->fileref->dc->name_uc.Buffer);
me->fileref->dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8->Length, ALLOC_TAG);
if (!me->fileref->dc->utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
me->fileref->dc->utf8.Length = me->fileref->dc->utf8.MaximumLength = utf8->Length;
RtlCopyMemory(me->fileref->dc->utf8.Buffer, utf8->Buffer, utf8->Length);
me->fileref->dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, fnus->Length, ALLOC_TAG);
if (!me->fileref->dc->name.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
me->fileref->dc->name.Length = me->fileref->dc->name.MaximumLength = fnus->Length;
RtlCopyMemory(me->fileref->dc->name.Buffer, fnus->Buffer, fnus->Length);
Status = RtlUpcaseUnicodeString(&fileref->dc->name_uc, &fileref->dc->name, true);
if (!NT_SUCCESS(Status)) {
ERR("RtlUpcaseUnicodeString returned %08lx\n", Status);
goto end;
}
me->fileref->dc->hash = calc_crc32c(0xffffffff, (uint8_t*)me->fileref->dc->name.Buffer, me->fileref->dc->name.Length);
me->fileref->dc->hash_uc = calc_crc32c(0xffffffff, (uint8_t*)me->fileref->dc->name_uc.Buffer, me->fileref->dc->name_uc.Length);
}
if (me->fileref->dc->key.obj_type == TYPE_INODE_ITEM)
me->fileref->dc->key.obj_id = me->fileref->fcb->inode;
// add to new parent
ExAcquireResourceExclusiveLite(&destdir->fcb->nonpaged->dir_children_lock, true);
if (IsListEmpty(&destdir->fcb->dir_children_index))
me->fileref->dc->index = 2;
else {
dir_child* dc2 = CONTAINING_RECORD(destdir->fcb->dir_children_index.Blink, dir_child, list_entry_index);
me->fileref->dc->index = max(2, dc2->index + 1);
}
InsertTailList(&destdir->fcb->dir_children_index, &me->fileref->dc->list_entry_index);
insert_dir_child_into_hash_lists(destdir->fcb, me->fileref->dc);
ExReleaseResourceLite(&destdir->fcb->nonpaged->dir_children_lock);
}
free_fileref(me->fileref->parent);
me->fileref->parent = destdir;
ExAcquireResourceExclusiveLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock, true);
InsertTailList(&me->fileref->parent->children, &me->fileref->list_entry);
ExReleaseResourceLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock);
TRACE("me->fileref->parent->fcb->inode_item.st_size (inode %I64x) was %I64x\n", me->fileref->parent->fcb->inode, me->fileref->parent->fcb->inode_item.st_size);
me->fileref->parent->fcb->inode_item.st_size += me->fileref->dc->utf8.Length * 2;
TRACE("me->fileref->parent->fcb->inode_item.st_size (inode %I64x) now %I64x\n", me->fileref->parent->fcb->inode, me->fileref->parent->fcb->inode_item.st_size);
me->fileref->parent->fcb->inode_item.transid = me->fileref->fcb->Vcb->superblock.generation;
me->fileref->parent->fcb->inode_item.sequence++;
me->fileref->parent->fcb->inode_item.st_ctime = now;
me->fileref->parent->fcb->inode_item.st_mtime = now;
me->fileref->parent->fcb->inode_item_changed = true;
mark_fcb_dirty(me->fileref->parent->fcb);
} else {
if (me->fileref->dc) {
ExAcquireResourceExclusiveLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock, true);
RemoveEntryList(&me->fileref->dc->list_entry_index);
if (!me->fileref->fcb->ads)
remove_dir_child_from_hash_lists(me->fileref->parent->fcb, me->fileref->dc);
ExReleaseResourceLite(&me->fileref->parent->fcb->nonpaged->dir_children_lock);
ExAcquireResourceExclusiveLite(&me->parent->fileref->fcb->nonpaged->dir_children_lock, true);
if (me->fileref->fcb->ads)
InsertHeadList(&me->parent->fileref->fcb->dir_children_index, &me->fileref->dc->list_entry_index);
else {
if (me->fileref->fcb->inode != SUBVOL_ROOT_INODE)
me->fileref->dc->key.obj_id = me->fileref->fcb->inode;
if (IsListEmpty(&me->parent->fileref->fcb->dir_children_index))
me->fileref->dc->index = 2;
else {
dir_child* dc2 = CONTAINING_RECORD(me->parent->fileref->fcb->dir_children_index.Blink, dir_child, list_entry_index);
me->fileref->dc->index = max(2, dc2->index + 1);
}
InsertTailList(&me->parent->fileref->fcb->dir_children_index, &me->fileref->dc->list_entry_index);
insert_dir_child_into_hash_lists(me->parent->fileref->fcb, me->fileref->dc);
}
ExReleaseResourceLite(&me->parent->fileref->fcb->nonpaged->dir_children_lock);
}
}
if (!me->dummyfileref->fcb->ads) {
Status = delete_fileref(me->dummyfileref, NULL, false, Irp, rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
if (me->fileref->fcb->inode_item.st_nlink > 1) {
hl = ExAllocatePoolWithTag(PagedPool, sizeof(hardlink), ALLOC_TAG);
if (!hl) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
hl->parent = me->fileref->parent->fcb->inode;
hl->index = me->fileref->dc->index;
hl->utf8.Length = hl->utf8.MaximumLength = me->fileref->dc->utf8.Length;
hl->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, hl->utf8.MaximumLength, ALLOC_TAG);
if (!hl->utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(hl);
goto end;
}
RtlCopyMemory(hl->utf8.Buffer, me->fileref->dc->utf8.Buffer, me->fileref->dc->utf8.Length);
hl->name.Length = hl->name.MaximumLength = me->fileref->dc->name.Length;
hl->name.Buffer = ExAllocatePoolWithTag(PagedPool, hl->name.MaximumLength, ALLOC_TAG);
if (!hl->name.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(hl->utf8.Buffer);
ExFreePool(hl);
goto end;
}
RtlCopyMemory(hl->name.Buffer, me->fileref->dc->name.Buffer, me->fileref->dc->name.Length);
InsertTailList(&me->fileref->fcb->hardlinks, &hl->list_entry);
}
mark_fileref_dirty(me->fileref);
le = le->Flink;
}
// loop through, and only mark streams as deleted if their parent inodes are also deleted
le = move_list.Flink;
while (le != &move_list) {
me = CONTAINING_RECORD(le, move_entry, list_entry);
if (me->dummyfileref->fcb->ads && me->parent->dummyfileref->fcb->deleted) {
Status = delete_fileref(me->dummyfileref, NULL, false, Irp, rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
le = le->Flink;
}
destdir->fcb->subvol->root_item.ctransid = destdir->fcb->Vcb->superblock.generation;
destdir->fcb->subvol->root_item.ctime = now;
me = CONTAINING_RECORD(move_list.Flink, move_entry, list_entry);
send_notification_fileref(fileref, fileref->fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED, NULL);
send_notification_fileref(me->dummyfileref->parent, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
send_notification_fileref(fileref->parent, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end:
while (!IsListEmpty(&move_list)) {
le = RemoveHeadList(&move_list);
me = CONTAINING_RECORD(le, move_entry, list_entry);
if (me->dummyfcb)
free_fcb(me->dummyfcb);
if (me->dummyfileref)
free_fileref(me->dummyfileref);
free_fileref(me->fileref);
ExFreePool(me);
}
destdir->fcb->subvol->fcbs_version++;
fileref->fcb->subvol->fcbs_version++;
release_fcb_lock(fileref->fcb->Vcb);
return Status;
}
void insert_dir_child_into_hash_lists(fcb* fcb, dir_child* dc) {
bool inserted;
LIST_ENTRY* le;
uint8_t c, d;
c = dc->hash >> 24;
inserted = false;
d = c;
do {
le = fcb->hash_ptrs[d];
if (d == 0)
break;
d--;
} while (!le);
if (!le)
le = fcb->dir_children_hash.Flink;
while (le != &fcb->dir_children_hash) {
dir_child* dc2 = CONTAINING_RECORD(le, dir_child, list_entry_hash);
if (dc2->hash > dc->hash) {
InsertHeadList(le->Blink, &dc->list_entry_hash);
inserted = true;
break;
}
le = le->Flink;
}
if (!inserted)
InsertTailList(&fcb->dir_children_hash, &dc->list_entry_hash);
if (!fcb->hash_ptrs[c])
fcb->hash_ptrs[c] = &dc->list_entry_hash;
else {
dir_child* dc2 = CONTAINING_RECORD(fcb->hash_ptrs[c], dir_child, list_entry_hash);
if (dc2->hash > dc->hash)
fcb->hash_ptrs[c] = &dc->list_entry_hash;
}
c = dc->hash_uc >> 24;
inserted = false;
d = c;
do {
le = fcb->hash_ptrs_uc[d];
if (d == 0)
break;
d--;
} while (!le);
if (!le)
le = fcb->dir_children_hash_uc.Flink;
while (le != &fcb->dir_children_hash_uc) {
dir_child* dc2 = CONTAINING_RECORD(le, dir_child, list_entry_hash_uc);
if (dc2->hash_uc > dc->hash_uc) {
InsertHeadList(le->Blink, &dc->list_entry_hash_uc);
inserted = true;
break;
}
le = le->Flink;
}
if (!inserted)
InsertTailList(&fcb->dir_children_hash_uc, &dc->list_entry_hash_uc);
if (!fcb->hash_ptrs_uc[c])
fcb->hash_ptrs_uc[c] = &dc->list_entry_hash_uc;
else {
dir_child* dc2 = CONTAINING_RECORD(fcb->hash_ptrs_uc[c], dir_child, list_entry_hash_uc);
if (dc2->hash_uc > dc->hash_uc)
fcb->hash_ptrs_uc[c] = &dc->list_entry_hash_uc;
}
}
static NTSTATUS rename_stream_to_file(device_extension* Vcb, file_ref* fileref, ccb* ccb, ULONG flags,
PIRP Irp, LIST_ENTRY* rollback) {
NTSTATUS Status;
file_ref* ofr;
ANSI_STRING adsdata;
dir_child* dc;
fcb* dummyfcb;
if (fileref->fcb->type != BTRFS_TYPE_FILE)
return STATUS_INVALID_PARAMETER;
if (!(flags & FILE_RENAME_IGNORE_READONLY_ATTRIBUTE) && fileref->parent->fcb->atts & FILE_ATTRIBUTE_READONLY) {
WARN("trying to rename stream on readonly file\n");
return STATUS_ACCESS_DENIED;
}
if (Irp->RequestorMode == UserMode && ccb && !(ccb->access & DELETE)) {
WARN("insufficient permissions\n");
return STATUS_ACCESS_DENIED;
}
if (!(flags & FILE_RENAME_REPLACE_IF_EXISTS)) // file will always exist
return STATUS_OBJECT_NAME_COLLISION;
// FIXME - POSIX overwrites of stream?
ofr = fileref->parent;
if (ofr->open_count > 0) {
WARN("trying to overwrite open file\n");
return STATUS_ACCESS_DENIED;
}
if (ofr->fcb->inode_item.st_size > 0) {
WARN("can only overwrite existing stream if it is zero-length\n");
return STATUS_INVALID_PARAMETER;
}
dummyfcb = create_fcb(Vcb, PagedPool);
if (!dummyfcb) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
// copy parent fcb onto this one
fileref->fcb->subvol = ofr->fcb->subvol;
fileref->fcb->inode = ofr->fcb->inode;
fileref->fcb->hash = ofr->fcb->hash;
fileref->fcb->type = ofr->fcb->type;
fileref->fcb->inode_item = ofr->fcb->inode_item;
fileref->fcb->sd = ofr->fcb->sd;
ofr->fcb->sd = NULL;
fileref->fcb->deleted = ofr->fcb->deleted;
fileref->fcb->atts = ofr->fcb->atts;
fileref->fcb->reparse_xattr = ofr->fcb->reparse_xattr;
ofr->fcb->reparse_xattr.Buffer = NULL;
ofr->fcb->reparse_xattr.Length = ofr->fcb->reparse_xattr.MaximumLength = 0;
fileref->fcb->ea_xattr = ofr->fcb->ea_xattr;
ofr->fcb->ea_xattr.Buffer = NULL;
ofr->fcb->ea_xattr.Length = ofr->fcb->ea_xattr.MaximumLength = 0;
fileref->fcb->ealen = ofr->fcb->ealen;
while (!IsListEmpty(&ofr->fcb->hardlinks)) {
InsertTailList(&fileref->fcb->hardlinks, RemoveHeadList(&ofr->fcb->hardlinks));
}
fileref->fcb->inode_item_changed = true;
fileref->fcb->prop_compression = ofr->fcb->prop_compression;
while (!IsListEmpty(&ofr->fcb->xattrs)) {
InsertTailList(&fileref->fcb->xattrs, RemoveHeadList(&ofr->fcb->xattrs));
}
fileref->fcb->marked_as_orphan = ofr->fcb->marked_as_orphan;
fileref->fcb->case_sensitive = ofr->fcb->case_sensitive;
fileref->fcb->case_sensitive_set = ofr->fcb->case_sensitive_set;
while (!IsListEmpty(&ofr->fcb->dir_children_index)) {
InsertTailList(&fileref->fcb->dir_children_index, RemoveHeadList(&ofr->fcb->dir_children_index));
}
while (!IsListEmpty(&ofr->fcb->dir_children_hash)) {
InsertTailList(&fileref->fcb->dir_children_hash, RemoveHeadList(&ofr->fcb->dir_children_hash));
}
while (!IsListEmpty(&ofr->fcb->dir_children_hash_uc)) {
InsertTailList(&fileref->fcb->dir_children_hash_uc, RemoveHeadList(&ofr->fcb->dir_children_hash_uc));
}
fileref->fcb->hash_ptrs = ofr->fcb->hash_ptrs;
fileref->fcb->hash_ptrs_uc = ofr->fcb->hash_ptrs_uc;
ofr->fcb->hash_ptrs = NULL;
ofr->fcb->hash_ptrs_uc = NULL;
fileref->fcb->sd_dirty = ofr->fcb->sd_dirty;
fileref->fcb->sd_deleted = ofr->fcb->sd_deleted;
fileref->fcb->atts_changed = ofr->fcb->atts_changed;
fileref->fcb->atts_deleted = ofr->fcb->atts_deleted;
fileref->fcb->extents_changed = true;
fileref->fcb->reparse_xattr_changed = ofr->fcb->reparse_xattr_changed;
fileref->fcb->ea_changed = ofr->fcb->ea_changed;
fileref->fcb->prop_compression_changed = ofr->fcb->prop_compression_changed;
fileref->fcb->xattrs_changed = ofr->fcb->xattrs_changed;
fileref->fcb->created = ofr->fcb->created;
fileref->fcb->ads = false;
if (fileref->fcb->adsxattr.Buffer) {
ExFreePool(fileref->fcb->adsxattr.Buffer);
fileref->fcb->adsxattr.Length = fileref->fcb->adsxattr.MaximumLength = 0;
fileref->fcb->adsxattr.Buffer = NULL;
}
adsdata = fileref->fcb->adsdata;
fileref->fcb->adsdata.Buffer = NULL;
fileref->fcb->adsdata.Length = fileref->fcb->adsdata.MaximumLength = 0;
InsertHeadList(ofr->fcb->list_entry.Blink, &fileref->fcb->list_entry);
if (fileref->fcb->subvol->fcbs_ptrs[fileref->fcb->hash >> 24] == &ofr->fcb->list_entry)
fileref->fcb->subvol->fcbs_ptrs[fileref->fcb->hash >> 24] = &fileref->fcb->list_entry;
RemoveEntryList(&ofr->fcb->list_entry);
ofr->fcb->list_entry.Flink = ofr->fcb->list_entry.Blink = NULL;
mark_fcb_dirty(fileref->fcb);
// mark old parent fcb so it gets ignored by flush_fcb
ofr->fcb->created = true;
ofr->fcb->deleted = true;
mark_fcb_dirty(ofr->fcb);
// copy parent fileref onto this one
fileref->oldutf8 = ofr->oldutf8;
ofr->oldutf8.Buffer = NULL;
ofr->oldutf8.Length = ofr->oldutf8.MaximumLength = 0;
fileref->oldindex = ofr->oldindex;
fileref->delete_on_close = ofr->delete_on_close;
fileref->posix_delete = ofr->posix_delete;
fileref->deleted = ofr->deleted;
fileref->created = ofr->created;
fileref->parent = ofr->parent;
RemoveEntryList(&fileref->list_entry);
InsertHeadList(ofr->list_entry.Blink, &fileref->list_entry);
RemoveEntryList(&ofr->list_entry);
ofr->list_entry.Flink = ofr->list_entry.Blink = NULL;
while (!IsListEmpty(&ofr->children)) {
file_ref* fr = CONTAINING_RECORD(RemoveHeadList(&ofr->children), file_ref, list_entry);
free_fileref(fr->parent);
fr->parent = fileref;
InterlockedIncrement(&fileref->refcount);
InsertTailList(&fileref->children, &fr->list_entry);
}
dc = fileref->dc;
fileref->dc = ofr->dc;
fileref->dc->fileref = fileref;
mark_fileref_dirty(fileref);
// mark old parent fileref so it gets ignored by flush_fileref
ofr->created = true;
ofr->deleted = true;
// write file data
fileref->fcb->inode_item.st_size = adsdata.Length;
if (adsdata.Length > 0) {
bool make_inline = adsdata.Length <= Vcb->options.max_inline;
if (make_inline) {
EXTENT_DATA* ed = ExAllocatePoolWithTag(PagedPool, (uint16_t)(offsetof(EXTENT_DATA, data[0]) + adsdata.Length), ALLOC_TAG);
if (!ed) {
ERR("out of memory\n");
ExFreePool(adsdata.Buffer);
reap_fcb(dummyfcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
ed->generation = Vcb->superblock.generation;
ed->decoded_size = adsdata.Length;
ed->compression = BTRFS_COMPRESSION_NONE;
ed->encryption = BTRFS_ENCRYPTION_NONE;
ed->encoding = BTRFS_ENCODING_NONE;
ed->type = EXTENT_TYPE_INLINE;
RtlCopyMemory(ed->data, adsdata.Buffer, adsdata.Length);
ExFreePool(adsdata.Buffer);
Status = add_extent_to_fcb(fileref->fcb, 0, ed, (uint16_t)(offsetof(EXTENT_DATA, data[0]) + adsdata.Length), false, NULL, rollback);
if (!NT_SUCCESS(Status)) {
ERR("add_extent_to_fcb returned %08lx\n", Status);
ExFreePool(ed);
reap_fcb(dummyfcb);
return Status;
}
ExFreePool(ed);
} else if (adsdata.Length % Vcb->superblock.sector_size) {
char* newbuf = ExAllocatePoolWithTag(PagedPool, (uint16_t)sector_align(adsdata.Length, Vcb->superblock.sector_size), ALLOC_TAG);
if (!newbuf) {
ERR("out of memory\n");
ExFreePool(adsdata.Buffer);
reap_fcb(dummyfcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(newbuf, adsdata.Buffer, adsdata.Length);
RtlZeroMemory(newbuf + adsdata.Length, (uint16_t)(sector_align(adsdata.Length, Vcb->superblock.sector_size) - adsdata.Length));
ExFreePool(adsdata.Buffer);
adsdata.Buffer = newbuf;
adsdata.Length = adsdata.MaximumLength = (uint16_t)sector_align(adsdata.Length, Vcb->superblock.sector_size);
}
if (!make_inline) {
Status = do_write_file(fileref->fcb, 0, adsdata.Length, adsdata.Buffer, Irp, false, 0, rollback);
if (!NT_SUCCESS(Status)) {
ERR("do_write_file returned %08lx\n", Status);
ExFreePool(adsdata.Buffer);
reap_fcb(dummyfcb);
return Status;
}
ExFreePool(adsdata.Buffer);
}
fileref->fcb->inode_item.st_blocks = adsdata.Length;
fileref->fcb->inode_item_changed = true;
}
RemoveEntryList(&dc->list_entry_index);
if (dc->utf8.Buffer)
ExFreePool(dc->utf8.Buffer);
if (dc->name.Buffer)
ExFreePool(dc->name.Buffer);
if (dc->name_uc.Buffer)
ExFreePool(dc->name_uc.Buffer);
ExFreePool(dc);
// FIXME - csums?
// add dummy deleted xattr with old name
dummyfcb->Vcb = Vcb;
dummyfcb->subvol = fileref->fcb->subvol;
dummyfcb->inode = fileref->fcb->inode;
dummyfcb->adsxattr = fileref->fcb->adsxattr;
dummyfcb->adshash = fileref->fcb->adshash;
dummyfcb->ads = true;
dummyfcb->deleted = true;
// FIXME - dummyfileref as well?
mark_fcb_dirty(dummyfcb);
free_fcb(dummyfcb);
return STATUS_SUCCESS;
}
static NTSTATUS rename_stream(device_extension* Vcb, file_ref* fileref, ccb* ccb, FILE_RENAME_INFORMATION_EX* fri,
ULONG flags, PIRP Irp, LIST_ENTRY* rollback) {
NTSTATUS Status;
UNICODE_STRING fn;
file_ref* sf = NULL;
uint16_t newmaxlen;
ULONG utf8len;
ANSI_STRING utf8;
UNICODE_STRING utf16, utf16uc;
ANSI_STRING adsxattr;
uint32_t crc32;
fcb* dummyfcb;
static const WCHAR datasuf[] = L":$DATA";
static const char xapref[] = "user.";
if (!fileref) {
ERR("fileref not set\n");
return STATUS_INVALID_PARAMETER;
}
if (!fileref->parent) {
ERR("fileref->parent not set\n");
return STATUS_INVALID_PARAMETER;
}
if (fri->FileNameLength < sizeof(WCHAR)) {
WARN("filename too short\n");
return STATUS_OBJECT_NAME_INVALID;
}
if (fri->FileName[0] != ':') {
WARN("destination filename must begin with a colon\n");
return STATUS_INVALID_PARAMETER;
}
if (Irp->RequestorMode == UserMode && ccb && !(ccb->access & DELETE)) {
WARN("insufficient permissions\n");
return STATUS_ACCESS_DENIED;
}
fn.Buffer = &fri->FileName[1];
fn.Length = fn.MaximumLength = (USHORT)(fri->FileNameLength - sizeof(WCHAR));
// remove :$DATA suffix
if (fn.Length >= sizeof(datasuf) - sizeof(WCHAR) &&
RtlCompareMemory(&fn.Buffer[(fn.Length - sizeof(datasuf) + sizeof(WCHAR))/sizeof(WCHAR)], datasuf, sizeof(datasuf) - sizeof(WCHAR)) == sizeof(datasuf) - sizeof(WCHAR))
fn.Length -= sizeof(datasuf) - sizeof(WCHAR);
if (fn.Length == 0)
return rename_stream_to_file(Vcb, fileref, ccb, flags, Irp, rollback);
if (!is_file_name_valid(&fn, false, true)) {
WARN("invalid stream name %.*S\n", (int)(fn.Length / sizeof(WCHAR)), fn.Buffer);
return STATUS_OBJECT_NAME_INVALID;
}
if (!(flags & FILE_RENAME_IGNORE_READONLY_ATTRIBUTE) && fileref->parent->fcb->atts & FILE_ATTRIBUTE_READONLY) {
WARN("trying to rename stream on readonly file\n");
return STATUS_ACCESS_DENIED;
}
Status = open_fileref_child(Vcb, fileref->parent, &fn, fileref->parent->fcb->case_sensitive, true, true, PagedPool, &sf, Irp);
if (Status != STATUS_OBJECT_NAME_NOT_FOUND) {
if (Status == STATUS_SUCCESS) {
if (fileref == sf || sf->deleted) {
free_fileref(sf);
sf = NULL;
} else {
if (!(flags & FILE_RENAME_REPLACE_IF_EXISTS)) {
Status = STATUS_OBJECT_NAME_COLLISION;
goto end;
}
// FIXME - POSIX overwrites of stream?
if (sf->open_count > 0) {
WARN("trying to overwrite open file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (sf->fcb->adsdata.Length > 0) {
WARN("can only overwrite existing stream if it is zero-length\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
Status = delete_fileref(sf, NULL, false, Irp, rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
} else {
ERR("open_fileref_child returned %08lx\n", Status);
goto end;
}
}
Status = utf16_to_utf8(NULL, 0, &utf8len, fn.Buffer, fn.Length);
if (!NT_SUCCESS(Status))
goto end;
utf8.MaximumLength = utf8.Length = (uint16_t)utf8len;
utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.MaximumLength, ALLOC_TAG);
if (!utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
Status = utf16_to_utf8(utf8.Buffer, utf8len, &utf8len, fn.Buffer, fn.Length);
if (!NT_SUCCESS(Status)) {
ExFreePool(utf8.Buffer);
goto end;
}
adsxattr.Length = adsxattr.MaximumLength = sizeof(xapref) - 1 + utf8.Length;
adsxattr.Buffer = ExAllocatePoolWithTag(PagedPool, adsxattr.MaximumLength, ALLOC_TAG);
if (!adsxattr.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
goto end;
}
RtlCopyMemory(adsxattr.Buffer, xapref, sizeof(xapref) - 1);
RtlCopyMemory(&adsxattr.Buffer[sizeof(xapref) - 1], utf8.Buffer, utf8.Length);
// don't allow if it's one of our reserved names
if ((adsxattr.Length == sizeof(EA_DOSATTRIB) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_DOSATTRIB, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_EA) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_EA, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_REPARSE) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_REPARSE, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_CASE_SENSITIVE) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_CASE_SENSITIVE, adsxattr.Length) == adsxattr.Length)) {
Status = STATUS_OBJECT_NAME_INVALID;
ExFreePool(utf8.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
utf16.Length = utf16.MaximumLength = fn.Length;
utf16.Buffer = ExAllocatePoolWithTag(PagedPool, utf16.MaximumLength, ALLOC_TAG);
if (!utf16.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
RtlCopyMemory(utf16.Buffer, fn.Buffer, fn.Length);
newmaxlen = Vcb->superblock.node_size - sizeof(tree_header) - sizeof(leaf_node) -
offsetof(DIR_ITEM, name[0]);
if (newmaxlen < adsxattr.Length) {
WARN("cannot rename as data too long\n");
Status = STATUS_INVALID_PARAMETER;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
newmaxlen -= adsxattr.Length;
if (newmaxlen < fileref->fcb->adsdata.Length) {
WARN("cannot rename as data too long\n");
Status = STATUS_INVALID_PARAMETER;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
Status = RtlUpcaseUnicodeString(&utf16uc, &fn, true);
if (!NT_SUCCESS(Status)) {
ERR("RtlUpcaseUnicodeString returned %08lx\n", Status);
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
// add dummy deleted xattr with old name
dummyfcb = create_fcb(Vcb, PagedPool);
if (!dummyfcb) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
dummyfcb->Vcb = Vcb;
dummyfcb->subvol = fileref->fcb->subvol;
dummyfcb->inode = fileref->fcb->inode;
dummyfcb->adsxattr = fileref->fcb->adsxattr;
dummyfcb->adshash = fileref->fcb->adshash;
dummyfcb->ads = true;
dummyfcb->deleted = true;
mark_fcb_dirty(dummyfcb);
free_fcb(dummyfcb);
// change fcb values
fileref->dc->utf8 = utf8;
fileref->dc->name = utf16;
fileref->dc->name_uc = utf16uc;
crc32 = calc_crc32c(0xfffffffe, (uint8_t*)adsxattr.Buffer, adsxattr.Length);
fileref->fcb->adsxattr = adsxattr;
fileref->fcb->adshash = crc32;
fileref->fcb->adsmaxlen = newmaxlen;
fileref->fcb->created = true;
mark_fcb_dirty(fileref->fcb);
Status = STATUS_SUCCESS;
end:
if (sf)
free_fileref(sf);
return Status;
}
static NTSTATUS rename_file_to_stream(device_extension* Vcb, file_ref* fileref, ccb* ccb, FILE_RENAME_INFORMATION_EX* fri,
ULONG flags, PIRP Irp, LIST_ENTRY* rollback) {
NTSTATUS Status;
UNICODE_STRING fn;
file_ref* sf = NULL;
uint16_t newmaxlen;
ULONG utf8len;
ANSI_STRING utf8;
UNICODE_STRING utf16, utf16uc;
ANSI_STRING adsxattr, adsdata;
uint32_t crc32;
fcb* dummyfcb;
file_ref* dummyfileref;
dir_child* dc;
LIST_ENTRY* le;
static const WCHAR datasuf[] = L":$DATA";
static const char xapref[] = "user.";
if (!fileref) {
ERR("fileref not set\n");
return STATUS_INVALID_PARAMETER;
}
if (fri->FileNameLength < sizeof(WCHAR)) {
WARN("filename too short\n");
return STATUS_OBJECT_NAME_INVALID;
}
if (fri->FileName[0] != ':') {
WARN("destination filename must begin with a colon\n");
return STATUS_INVALID_PARAMETER;
}
if (Irp->RequestorMode == UserMode && ccb && !(ccb->access & DELETE)) {
WARN("insufficient permissions\n");
return STATUS_ACCESS_DENIED;
}
if (fileref->fcb->type != BTRFS_TYPE_FILE)
return STATUS_INVALID_PARAMETER;
fn.Buffer = &fri->FileName[1];
fn.Length = fn.MaximumLength = (USHORT)(fri->FileNameLength - sizeof(WCHAR));
// remove :$DATA suffix
if (fn.Length >= sizeof(datasuf) - sizeof(WCHAR) &&
RtlCompareMemory(&fn.Buffer[(fn.Length - sizeof(datasuf) + sizeof(WCHAR))/sizeof(WCHAR)], datasuf, sizeof(datasuf) - sizeof(WCHAR)) == sizeof(datasuf) - sizeof(WCHAR))
fn.Length -= sizeof(datasuf) - sizeof(WCHAR);
if (fn.Length == 0) {
WARN("not allowing overwriting file with itself\n");
return STATUS_INVALID_PARAMETER;
}
if (!is_file_name_valid(&fn, false, true)) {
WARN("invalid stream name %.*S\n", (int)(fn.Length / sizeof(WCHAR)), fn.Buffer);
return STATUS_OBJECT_NAME_INVALID;
}
if (!(flags & FILE_RENAME_IGNORE_READONLY_ATTRIBUTE) && fileref->fcb->atts & FILE_ATTRIBUTE_READONLY) {
WARN("trying to rename stream on readonly file\n");
return STATUS_ACCESS_DENIED;
}
Status = open_fileref_child(Vcb, fileref, &fn, fileref->fcb->case_sensitive, true, true, PagedPool, &sf, Irp);
if (Status != STATUS_OBJECT_NAME_NOT_FOUND) {
if (Status == STATUS_SUCCESS) {
if (fileref == sf || sf->deleted) {
free_fileref(sf);
sf = NULL;
} else {
if (!(flags & FILE_RENAME_REPLACE_IF_EXISTS)) {
Status = STATUS_OBJECT_NAME_COLLISION;
goto end;
}
// FIXME - POSIX overwrites of stream?
if (sf->open_count > 0) {
WARN("trying to overwrite open file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (sf->fcb->adsdata.Length > 0) {
WARN("can only overwrite existing stream if it is zero-length\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
Status = delete_fileref(sf, NULL, false, Irp, rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
} else {
ERR("open_fileref_child returned %08lx\n", Status);
goto end;
}
}
Status = utf16_to_utf8(NULL, 0, &utf8len, fn.Buffer, fn.Length);
if (!NT_SUCCESS(Status))
goto end;
utf8.MaximumLength = utf8.Length = (uint16_t)utf8len;
utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.MaximumLength, ALLOC_TAG);
if (!utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
Status = utf16_to_utf8(utf8.Buffer, utf8len, &utf8len, fn.Buffer, fn.Length);
if (!NT_SUCCESS(Status)) {
ExFreePool(utf8.Buffer);
goto end;
}
adsxattr.Length = adsxattr.MaximumLength = sizeof(xapref) - 1 + utf8.Length;
adsxattr.Buffer = ExAllocatePoolWithTag(PagedPool, adsxattr.MaximumLength, ALLOC_TAG);
if (!adsxattr.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
goto end;
}
RtlCopyMemory(adsxattr.Buffer, xapref, sizeof(xapref) - 1);
RtlCopyMemory(&adsxattr.Buffer[sizeof(xapref) - 1], utf8.Buffer, utf8.Length);
// don't allow if it's one of our reserved names
if ((adsxattr.Length == sizeof(EA_DOSATTRIB) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_DOSATTRIB, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_EA) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_EA, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_REPARSE) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_REPARSE, adsxattr.Length) == adsxattr.Length) ||
(adsxattr.Length == sizeof(EA_CASE_SENSITIVE) - sizeof(WCHAR) && RtlCompareMemory(adsxattr.Buffer, EA_CASE_SENSITIVE, adsxattr.Length) == adsxattr.Length)) {
Status = STATUS_OBJECT_NAME_INVALID;
ExFreePool(utf8.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
utf16.Length = utf16.MaximumLength = fn.Length;
utf16.Buffer = ExAllocatePoolWithTag(PagedPool, utf16.MaximumLength, ALLOC_TAG);
if (!utf16.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
RtlCopyMemory(utf16.Buffer, fn.Buffer, fn.Length);
newmaxlen = Vcb->superblock.node_size - sizeof(tree_header) - sizeof(leaf_node) -
offsetof(DIR_ITEM, name[0]);
if (newmaxlen < adsxattr.Length) {
WARN("cannot rename as data too long\n");
Status = STATUS_INVALID_PARAMETER;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
newmaxlen -= adsxattr.Length;
if (newmaxlen < fileref->fcb->inode_item.st_size) {
WARN("cannot rename as data too long\n");
Status = STATUS_INVALID_PARAMETER;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
Status = RtlUpcaseUnicodeString(&utf16uc, &fn, true);
if (!NT_SUCCESS(Status)) {
ERR("RtlUpcaseUnicodeString returned %08lx\n", Status);
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
// read existing file data
if (fileref->fcb->inode_item.st_size > 0) {
ULONG bytes_read;
adsdata.Length = adsdata.MaximumLength = (uint16_t)fileref->fcb->inode_item.st_size;
adsdata.Buffer = ExAllocatePoolWithTag(PagedPool, adsdata.MaximumLength, ALLOC_TAG);
if (!adsdata.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
goto end;
}
Status = read_file(fileref->fcb, (uint8_t*)adsdata.Buffer, 0, adsdata.Length, &bytes_read, Irp);
if (!NT_SUCCESS(Status)) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
ExFreePool(adsdata.Buffer);
goto end;
}
if (bytes_read < fileref->fcb->inode_item.st_size) {
ERR("short read\n");
Status = STATUS_INTERNAL_ERROR;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
ExFreePool(adsdata.Buffer);
goto end;
}
} else
adsdata.Buffer = NULL;
dc = ExAllocatePoolWithTag(PagedPool, sizeof(dir_child), ALLOC_TAG);
if (!dc) {
ERR("short read\n");
Status = STATUS_INSUFFICIENT_RESOURCES;;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
if (adsdata.Buffer)
ExFreePool(adsdata.Buffer);
goto end;
}
// add dummy deleted fcb with old name
Status = duplicate_fcb(fileref->fcb, &dummyfcb);
if (!NT_SUCCESS(Status)) {
ERR("duplicate_fcb returned %08lx\n", Status);
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
if (adsdata.Buffer)
ExFreePool(adsdata.Buffer);
ExFreePool(dc);
goto end;
}
dummyfileref = create_fileref(Vcb);
if (!dummyfileref) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
if (adsdata.Buffer)
ExFreePool(adsdata.Buffer);
ExFreePool(dc);
reap_fcb(dummyfcb);
goto end;
}
dummyfileref->fcb = dummyfcb;
dummyfcb->Vcb = Vcb;
dummyfcb->subvol = fileref->fcb->subvol;
dummyfcb->inode = fileref->fcb->inode;
dummyfcb->hash = fileref->fcb->hash;
if (fileref->fcb->inode_item.st_size > 0) {
Status = excise_extents(Vcb, dummyfcb, 0, sector_align(fileref->fcb->inode_item.st_size, Vcb->superblock.sector_size),
Irp, rollback);
if (!NT_SUCCESS(Status)) {
ERR("excise_extents returned %08lx\n", Status);
ExFreePool(utf8.Buffer);
ExFreePool(utf16.Buffer);
ExFreePool(utf16uc.Buffer);
ExFreePool(adsxattr.Buffer);
ExFreePool(adsdata.Buffer);
ExFreePool(dc);
reap_fileref(Vcb, dummyfileref);
reap_fcb(dummyfcb);
goto end;
}
dummyfcb->inode_item.st_size = 0;
dummyfcb->Header.AllocationSize.QuadPart = 0;
dummyfcb->Header.FileSize.QuadPart = 0;
dummyfcb->Header.ValidDataLength.QuadPart = 0;
}
dummyfcb->hash_ptrs = fileref->fcb->hash_ptrs;
dummyfcb->hash_ptrs_uc = fileref->fcb->hash_ptrs_uc;
dummyfcb->created = fileref->fcb->created;
le = fileref->fcb->extents.Flink;
while (le != &fileref->fcb->extents) {
extent* ext = CONTAINING_RECORD(le, extent, list_entry);
ext->ignore = true;
le = le->Flink;
}
while (!IsListEmpty(&fileref->fcb->dir_children_index)) {
InsertTailList(&dummyfcb->dir_children_index, RemoveHeadList(&fileref->fcb->dir_children_index));
}
while (!IsListEmpty(&fileref->fcb->dir_children_hash)) {
InsertTailList(&dummyfcb->dir_children_hash, RemoveHeadList(&fileref->fcb->dir_children_hash));
}
while (!IsListEmpty(&fileref->fcb->dir_children_hash_uc)) {
InsertTailList(&dummyfcb->dir_children_hash_uc, RemoveHeadList(&fileref->fcb->dir_children_hash_uc));
}
InsertTailList(&Vcb->all_fcbs, &dummyfcb->list_entry_all);
InsertHeadList(fileref->fcb->list_entry.Blink, &dummyfcb->list_entry);
if (fileref->fcb->subvol->fcbs_ptrs[dummyfcb->hash >> 24] == &fileref->fcb->list_entry)
fileref->fcb->subvol->fcbs_ptrs[dummyfcb->hash >> 24] = &dummyfcb->list_entry;
RemoveEntryList(&fileref->fcb->list_entry);
fileref->fcb->list_entry.Flink = fileref->fcb->list_entry.Blink = NULL;
mark_fcb_dirty(dummyfcb);
// create dummy fileref
dummyfileref->oldutf8 = fileref->oldutf8;
dummyfileref->oldindex = fileref->oldindex;
dummyfileref->delete_on_close = fileref->delete_on_close;
dummyfileref->posix_delete = fileref->posix_delete;
dummyfileref->deleted = fileref->deleted;
dummyfileref->created = fileref->created;
dummyfileref->parent = fileref->parent;
while (!IsListEmpty(&fileref->children)) {
file_ref* fr = CONTAINING_RECORD(RemoveHeadList(&fileref->children), file_ref, list_entry);
free_fileref(fr->parent);
fr->parent = dummyfileref;
InterlockedIncrement(&dummyfileref->refcount);
InsertTailList(&dummyfileref->children, &fr->list_entry);
}
InsertTailList(fileref->list_entry.Blink, &dummyfileref->list_entry);
RemoveEntryList(&fileref->list_entry);
InsertTailList(&dummyfileref->children, &fileref->list_entry);
dummyfileref->dc = fileref->dc;
dummyfileref->dc->fileref = dummyfileref;
mark_fileref_dirty(dummyfileref);
free_fileref(dummyfileref);
// change fcb values
fileref->fcb->hash_ptrs = NULL;
fileref->fcb->hash_ptrs_uc = NULL;
fileref->fcb->ads = true;
fileref->oldutf8.Length = fileref->oldutf8.MaximumLength = 0;
fileref->oldutf8.Buffer = NULL;
RtlZeroMemory(dc, sizeof(dir_child));
dc->utf8 = utf8;
dc->name = utf16;
dc->hash = calc_crc32c(0xffffffff, (uint8_t*)dc->name.Buffer, dc->name.Length);
dc->name_uc = utf16uc;
dc->hash_uc = calc_crc32c(0xffffffff, (uint8_t*)dc->name_uc.Buffer, dc->name_uc.Length);
dc->fileref = fileref;
InsertTailList(&dummyfcb->dir_children_index, &dc->list_entry_index);
fileref->dc = dc;
fileref->parent = dummyfileref;
crc32 = calc_crc32c(0xfffffffe, (uint8_t*)adsxattr.Buffer, adsxattr.Length);
fileref->fcb->adsxattr = adsxattr;
fileref->fcb->adshash = crc32;
fileref->fcb->adsmaxlen = newmaxlen;
fileref->fcb->adsdata = adsdata;
fileref->fcb->created = true;
mark_fcb_dirty(fileref->fcb);
Status = STATUS_SUCCESS;
end:
if (sf)
free_fileref(sf);
return Status;
}
static NTSTATUS set_rename_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject, PFILE_OBJECT tfo, bool ex) {
FILE_RENAME_INFORMATION_EX* fri = Irp->AssociatedIrp.SystemBuffer;
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref *fileref = ccb ? ccb->fileref : NULL, *oldfileref = NULL, *related = NULL, *fr2 = NULL;
WCHAR* fn;
ULONG fnlen, utf8len, origutf8len;
UNICODE_STRING fnus;
ANSI_STRING utf8;
NTSTATUS Status;
LARGE_INTEGER time;
BTRFS_TIME now;
LIST_ENTRY rollback, *le;
hardlink* hl;
SECURITY_SUBJECT_CONTEXT subjcont;
ACCESS_MASK access;
ULONG flags;
#ifdef __REACTOS__
unsigned int i;
#endif
InitializeListHead(&rollback);
if (ex)
flags = fri->Flags;
else
flags = fri->ReplaceIfExists ? FILE_RENAME_REPLACE_IF_EXISTS : 0;
TRACE("tfo = %p\n", tfo);
TRACE("Flags = %lx\n", flags);
TRACE("RootDirectory = %p\n", fri->RootDirectory);
TRACE("FileName = %.*S\n", (int)(fri->FileNameLength / sizeof(WCHAR)), fri->FileName);
fn = fri->FileName;
fnlen = fri->FileNameLength / sizeof(WCHAR);
if (!tfo) {
if (!fileref || !fileref->parent) {
ERR("no fileref set and no directory given\n");
return STATUS_INVALID_PARAMETER;
}
} else {
LONG i;
while (fnlen > 0 && (fri->FileName[fnlen - 1] == '/' || fri->FileName[fnlen - 1] == '\\'))
fnlen--;
if (fnlen == 0)
return STATUS_INVALID_PARAMETER;
for (i = fnlen - 1; i >= 0; i--) {
if (fri->FileName[i] == '\\' || fri->FileName[i] == '/') {
fn = &fri->FileName[i+1];
fnlen = (fri->FileNameLength / sizeof(WCHAR)) - i - 1;
break;
}
}
}
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
ExAcquireResourceExclusiveLite(&Vcb->fileref_lock, true);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fcb->inode == SUBVOL_ROOT_INODE && fcb->subvol->id == BTRFS_ROOT_FSTREE) {
WARN("not allowing \\$Root to be renamed\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (fcb->ads) {
if (FileObject->SectionObjectPointer && FileObject->SectionObjectPointer->DataSectionObject) {
IO_STATUS_BLOCK iosb;
CcFlushCache(FileObject->SectionObjectPointer, NULL, 0, &iosb);
if (!NT_SUCCESS(iosb.Status)) {
ERR("CcFlushCache returned %08lx\n", iosb.Status);
Status = iosb.Status;
goto end;
}
}
Status = rename_stream(Vcb, fileref, ccb, fri, flags, Irp, &rollback);
goto end;
} else if (fnlen >= 1 && fn[0] == ':') {
if (FileObject->SectionObjectPointer && FileObject->SectionObjectPointer->DataSectionObject) {
IO_STATUS_BLOCK iosb;
CcFlushCache(FileObject->SectionObjectPointer, NULL, 0, &iosb);
if (!NT_SUCCESS(iosb.Status)) {
ERR("CcFlushCache returned %08lx\n", iosb.Status);
Status = iosb.Status;
goto end;
}
}
Status = rename_file_to_stream(Vcb, fileref, ccb, fri, flags, Irp, &rollback);
goto end;
}
fnus.Buffer = fn;
fnus.Length = fnus.MaximumLength = (uint16_t)(fnlen * sizeof(WCHAR));
TRACE("fnus = %.*S\n", (int)(fnus.Length / sizeof(WCHAR)), fnus.Buffer);
#ifndef __REACTOS__
for (unsigned int i = 0 ; i < fnus.Length / sizeof(WCHAR); i++) {
#else
for (i = 0 ; i < fnus.Length / sizeof(WCHAR); i++) {
#endif
if (fnus.Buffer[i] == ':') {
TRACE("colon in filename\n");
Status = STATUS_OBJECT_NAME_INVALID;
goto end;
}
}
origutf8len = fileref->dc->utf8.Length;
Status = utf16_to_utf8(NULL, 0, &utf8len, fn, (ULONG)fnlen * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
goto end;
utf8.MaximumLength = utf8.Length = (uint16_t)utf8len;
utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.MaximumLength, ALLOC_TAG);
if (!utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
Status = utf16_to_utf8(utf8.Buffer, utf8len, &utf8len, fn, (ULONG)fnlen * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
goto end;
if (tfo && tfo->FsContext2) {
struct _ccb* relatedccb = tfo->FsContext2;
related = relatedccb->fileref;
increase_fileref_refcount(related);
} else if (fnus.Length >= sizeof(WCHAR) && fnus.Buffer[0] != '\\') {
related = fileref->parent;
increase_fileref_refcount(related);
}
Status = open_fileref(Vcb, &oldfileref, &fnus, related, false, NULL, NULL, PagedPool, ccb->case_sensitive, Irp);
if (NT_SUCCESS(Status)) {
TRACE("destination file already exists\n");
if (fileref != oldfileref && !oldfileref->deleted) {
if (!(flags & FILE_RENAME_REPLACE_IF_EXISTS)) {
Status = STATUS_OBJECT_NAME_COLLISION;
goto end;
} else if (fileref == oldfileref) {
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (!(flags & FILE_RENAME_POSIX_SEMANTICS) && (oldfileref->open_count > 0 || has_open_children(oldfileref)) && !oldfileref->deleted) {
WARN("trying to overwrite open file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (!(flags & FILE_RENAME_IGNORE_READONLY_ATTRIBUTE) && oldfileref->fcb->atts & FILE_ATTRIBUTE_READONLY) {
WARN("trying to overwrite readonly file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (oldfileref->fcb->type == BTRFS_TYPE_DIRECTORY) {
WARN("trying to overwrite directory\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
}
if (fileref == oldfileref || oldfileref->deleted) {
free_fileref(oldfileref);
oldfileref = NULL;
}
}
if (!related) {
Status = open_fileref(Vcb, &related, &fnus, NULL, true, NULL, NULL, PagedPool, ccb->case_sensitive, Irp);
if (!NT_SUCCESS(Status)) {
ERR("open_fileref returned %08lx\n", Status);
goto end;
}
}
if (related->fcb == Vcb->dummy_fcb) {
Status = STATUS_ACCESS_DENIED;
goto end;
}
SeCaptureSubjectContext(&subjcont);
if (!SeAccessCheck(related->fcb->sd, &subjcont, false, fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_ADD_SUBDIRECTORY : FILE_ADD_FILE, 0, NULL,
IoGetFileObjectGenericMapping(), Irp->RequestorMode, &access, &Status)) {
SeReleaseSubjectContext(&subjcont);
TRACE("SeAccessCheck failed, returning %08lx\n", Status);
goto end;
}
SeReleaseSubjectContext(&subjcont);
if (has_open_children(fileref)) {
WARN("trying to rename file with open children\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (oldfileref) {
SeCaptureSubjectContext(&subjcont);
if (!SeAccessCheck(oldfileref->fcb->sd, &subjcont, false, DELETE, 0, NULL,
IoGetFileObjectGenericMapping(), Irp->RequestorMode, &access, &Status)) {
SeReleaseSubjectContext(&subjcont);
TRACE("SeAccessCheck failed, returning %08lx\n", Status);
goto end;
}
SeReleaseSubjectContext(&subjcont);
if (oldfileref->open_count > 0 && flags & FILE_RENAME_POSIX_SEMANTICS) {
oldfileref->delete_on_close = true;
oldfileref->posix_delete = true;
}
Status = delete_fileref(oldfileref, NULL, oldfileref->open_count > 0 && flags & FILE_RENAME_POSIX_SEMANTICS, Irp, &rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
if (fileref->parent->fcb->subvol != related->fcb->subvol && (fileref->fcb->subvol == fileref->parent->fcb->subvol || fileref->fcb == Vcb->dummy_fcb)) {
Status = move_across_subvols(fileref, ccb, related, &utf8, &fnus, Irp, &rollback);
if (!NT_SUCCESS(Status)) {
ERR("move_across_subvols returned %08lx\n", Status);
}
goto end;
}
if (related == fileref->parent) { // keeping file in same directory
UNICODE_STRING oldfn, newfn;
USHORT name_offset;
ULONG reqlen, oldutf8len;
oldfn.Length = oldfn.MaximumLength = 0;
Status = fileref_get_filename(fileref, &oldfn, &name_offset, &reqlen);
if (Status != STATUS_BUFFER_OVERFLOW) {
ERR("fileref_get_filename returned %08lx\n", Status);
goto end;
}
oldfn.Buffer = ExAllocatePoolWithTag(PagedPool, reqlen, ALLOC_TAG);
if (!oldfn.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
oldfn.MaximumLength = (uint16_t)reqlen;
Status = fileref_get_filename(fileref, &oldfn, &name_offset, &reqlen);
if (!NT_SUCCESS(Status)) {
ERR("fileref_get_filename returned %08lx\n", Status);
ExFreePool(oldfn.Buffer);
goto end;
}
oldutf8len = fileref->dc->utf8.Length;
if (!fileref->created && !fileref->oldutf8.Buffer) {
fileref->oldutf8.Buffer = ExAllocatePoolWithTag(PagedPool, fileref->dc->utf8.Length, ALLOC_TAG);
if (!fileref->oldutf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
fileref->oldutf8.Length = fileref->oldutf8.MaximumLength = fileref->dc->utf8.Length;
RtlCopyMemory(fileref->oldutf8.Buffer, fileref->dc->utf8.Buffer, fileref->dc->utf8.Length);
}
TRACE("renaming %.*S to %.*S\n", (int)(fileref->dc->name.Length / sizeof(WCHAR)), fileref->dc->name.Buffer, (int)(fnus.Length / sizeof(WCHAR)), fnus.Buffer);
mark_fileref_dirty(fileref);
if (fileref->dc) {
ExAcquireResourceExclusiveLite(&fileref->parent->fcb->nonpaged->dir_children_lock, true);
ExFreePool(fileref->dc->utf8.Buffer);
ExFreePool(fileref->dc->name.Buffer);
ExFreePool(fileref->dc->name_uc.Buffer);
fileref->dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.Length, ALLOC_TAG);
if (!fileref->dc->utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExReleaseResourceLite(&fileref->parent->fcb->nonpaged->dir_children_lock);
ExFreePool(oldfn.Buffer);
goto end;
}
fileref->dc->utf8.Length = fileref->dc->utf8.MaximumLength = utf8.Length;
RtlCopyMemory(fileref->dc->utf8.Buffer, utf8.Buffer, utf8.Length);
fileref->dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, fnus.Length, ALLOC_TAG);
if (!fileref->dc->name.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExReleaseResourceLite(&fileref->parent->fcb->nonpaged->dir_children_lock);
ExFreePool(oldfn.Buffer);
goto end;
}
fileref->dc->name.Length = fileref->dc->name.MaximumLength = fnus.Length;
RtlCopyMemory(fileref->dc->name.Buffer, fnus.Buffer, fnus.Length);
Status = RtlUpcaseUnicodeString(&fileref->dc->name_uc, &fileref->dc->name, true);
if (!NT_SUCCESS(Status)) {
ERR("RtlUpcaseUnicodeString returned %08lx\n", Status);
ExReleaseResourceLite(&fileref->parent->fcb->nonpaged->dir_children_lock);
ExFreePool(oldfn.Buffer);
goto end;
}
remove_dir_child_from_hash_lists(fileref->parent->fcb, fileref->dc);
fileref->dc->hash = calc_crc32c(0xffffffff, (uint8_t*)fileref->dc->name.Buffer, fileref->dc->name.Length);
fileref->dc->hash_uc = calc_crc32c(0xffffffff, (uint8_t*)fileref->dc->name_uc.Buffer, fileref->dc->name_uc.Length);
insert_dir_child_into_hash_lists(fileref->parent->fcb, fileref->dc);
ExReleaseResourceLite(&fileref->parent->fcb->nonpaged->dir_children_lock);
}
newfn.Length = newfn.MaximumLength = 0;
Status = fileref_get_filename(fileref, &newfn, &name_offset, &reqlen);
if (Status != STATUS_BUFFER_OVERFLOW) {
ERR("fileref_get_filename returned %08lx\n", Status);
ExFreePool(oldfn.Buffer);
goto end;
}
newfn.Buffer = ExAllocatePoolWithTag(PagedPool, reqlen, ALLOC_TAG);
if (!newfn.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
ExFreePool(oldfn.Buffer);
goto end;
}
newfn.MaximumLength = (uint16_t)reqlen;
Status = fileref_get_filename(fileref, &newfn, &name_offset, &reqlen);
if (!NT_SUCCESS(Status)) {
ERR("fileref_get_filename returned %08lx\n", Status);
ExFreePool(oldfn.Buffer);
ExFreePool(newfn.Buffer);
goto end;
}
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
if (fcb != Vcb->dummy_fcb && (fileref->parent->fcb->subvol == fcb->subvol || !is_subvol_readonly(fcb->subvol, Irp))) {
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.sequence++;
if (!ccb->user_set_change_time)
fcb->inode_item.st_ctime = now;
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
}
// update parent's INODE_ITEM
related->fcb->inode_item.transid = Vcb->superblock.generation;
TRACE("related->fcb->inode_item.st_size (inode %I64x) was %I64x\n", related->fcb->inode, related->fcb->inode_item.st_size);
related->fcb->inode_item.st_size = related->fcb->inode_item.st_size + (2 * utf8.Length) - (2* oldutf8len);
TRACE("related->fcb->inode_item.st_size (inode %I64x) now %I64x\n", related->fcb->inode, related->fcb->inode_item.st_size);
related->fcb->inode_item.sequence++;
related->fcb->inode_item.st_ctime = now;
related->fcb->inode_item.st_mtime = now;
related->fcb->inode_item_changed = true;
mark_fcb_dirty(related->fcb);
send_notification_fileref(related, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
FsRtlNotifyFilterReportChange(fcb->Vcb->NotifySync, &fcb->Vcb->DirNotifyList, (PSTRING)&oldfn, name_offset, NULL, NULL,
fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_RENAMED_OLD_NAME, NULL, NULL);
FsRtlNotifyFilterReportChange(fcb->Vcb->NotifySync, &fcb->Vcb->DirNotifyList, (PSTRING)&newfn, name_offset, NULL, NULL,
fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_RENAMED_NEW_NAME, NULL, NULL);
ExFreePool(oldfn.Buffer);
ExFreePool(newfn.Buffer);
Status = STATUS_SUCCESS;
goto end;
}
// We move files by moving the existing fileref to the new directory, and
// replacing it with a dummy fileref with the same original values, but marked as deleted.
send_notification_fileref(fileref, fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_REMOVED, NULL);
fr2 = create_fileref(Vcb);
fr2->fcb = fileref->fcb;
fr2->fcb->refcount++;
fr2->oldutf8 = fileref->oldutf8;
fr2->oldindex = fileref->dc->index;
fr2->delete_on_close = fileref->delete_on_close;
fr2->deleted = true;
fr2->created = fileref->created;
fr2->parent = fileref->parent;
fr2->dc = NULL;
if (!fr2->oldutf8.Buffer) {
fr2->oldutf8.Buffer = ExAllocatePoolWithTag(PagedPool, fileref->dc->utf8.Length, ALLOC_TAG);
if (!fr2->oldutf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(fr2->oldutf8.Buffer, fileref->dc->utf8.Buffer, fileref->dc->utf8.Length);
fr2->oldutf8.Length = fr2->oldutf8.MaximumLength = fileref->dc->utf8.Length;
}
if (fr2->fcb->type == BTRFS_TYPE_DIRECTORY)
fr2->fcb->fileref = fr2;
if (fileref->fcb->inode == SUBVOL_ROOT_INODE)
fileref->fcb->subvol->parent = related->fcb->subvol->id;
fileref->oldutf8.Length = fileref->oldutf8.MaximumLength = 0;
fileref->oldutf8.Buffer = NULL;
fileref->deleted = false;
fileref->created = true;
fileref->parent = related;
ExAcquireResourceExclusiveLite(&fileref->parent->fcb->nonpaged->dir_children_lock, true);
InsertHeadList(&fileref->list_entry, &fr2->list_entry);
RemoveEntryList(&fileref->list_entry);
ExReleaseResourceLite(&fileref->parent->fcb->nonpaged->dir_children_lock);
mark_fileref_dirty(fr2);
mark_fileref_dirty(fileref);
if (fileref->dc) {
// remove from old parent
ExAcquireResourceExclusiveLite(&fr2->parent->fcb->nonpaged->dir_children_lock, true);
RemoveEntryList(&fileref->dc->list_entry_index);
remove_dir_child_from_hash_lists(fr2->parent->fcb, fileref->dc);
ExReleaseResourceLite(&fr2->parent->fcb->nonpaged->dir_children_lock);
if (fileref->dc->utf8.Length != utf8.Length || RtlCompareMemory(fileref->dc->utf8.Buffer, utf8.Buffer, utf8.Length) != utf8.Length) {
// handle changed name
ExFreePool(fileref->dc->utf8.Buffer);
ExFreePool(fileref->dc->name.Buffer);
ExFreePool(fileref->dc->name_uc.Buffer);
fileref->dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.Length, ALLOC_TAG);
if (!fileref->dc->utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
fileref->dc->utf8.Length = fileref->dc->utf8.MaximumLength = utf8.Length;
RtlCopyMemory(fileref->dc->utf8.Buffer, utf8.Buffer, utf8.Length);
fileref->dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, fnus.Length, ALLOC_TAG);
if (!fileref->dc->name.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
fileref->dc->name.Length = fileref->dc->name.MaximumLength = fnus.Length;
RtlCopyMemory(fileref->dc->name.Buffer, fnus.Buffer, fnus.Length);
Status = RtlUpcaseUnicodeString(&fileref->dc->name_uc, &fileref->dc->name, true);
if (!NT_SUCCESS(Status)) {
ERR("RtlUpcaseUnicodeString returned %08lx\n", Status);
goto end;
}
fileref->dc->hash = calc_crc32c(0xffffffff, (uint8_t*)fileref->dc->name.Buffer, fileref->dc->name.Length);
fileref->dc->hash_uc = calc_crc32c(0xffffffff, (uint8_t*)fileref->dc->name_uc.Buffer, fileref->dc->name_uc.Length);
}
// add to new parent
ExAcquireResourceExclusiveLite(&related->fcb->nonpaged->dir_children_lock, true);
if (IsListEmpty(&related->fcb->dir_children_index))
fileref->dc->index = 2;
else {
dir_child* dc2 = CONTAINING_RECORD(related->fcb->dir_children_index.Blink, dir_child, list_entry_index);
fileref->dc->index = max(2, dc2->index + 1);
}
InsertTailList(&related->fcb->dir_children_index, &fileref->dc->list_entry_index);
insert_dir_child_into_hash_lists(related->fcb, fileref->dc);
ExReleaseResourceLite(&related->fcb->nonpaged->dir_children_lock);
}
ExAcquireResourceExclusiveLite(&related->fcb->nonpaged->dir_children_lock, true);
InsertTailList(&related->children, &fileref->list_entry);
ExReleaseResourceLite(&related->fcb->nonpaged->dir_children_lock);
if (fcb->inode_item.st_nlink > 1) {
// add new hardlink entry to fcb
hl = ExAllocatePoolWithTag(PagedPool, sizeof(hardlink), ALLOC_TAG);
if (!hl) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
hl->parent = related->fcb->inode;
hl->index = fileref->dc->index;
hl->name.Length = hl->name.MaximumLength = fnus.Length;
hl->name.Buffer = ExAllocatePoolWithTag(PagedPool, hl->name.MaximumLength, ALLOC_TAG);
if (!hl->name.Buffer) {
ERR("out of memory\n");
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->name.Buffer, fnus.Buffer, fnus.Length);
hl->utf8.Length = hl->utf8.MaximumLength = fileref->dc->utf8.Length;
hl->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, hl->utf8.MaximumLength, ALLOC_TAG);
if (!hl->utf8.Buffer) {
ERR("out of memory\n");
ExFreePool(hl->name.Buffer);
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->utf8.Buffer, fileref->dc->utf8.Buffer, fileref->dc->utf8.Length);
InsertTailList(&fcb->hardlinks, &hl->list_entry);
}
// delete old hardlink entry from fcb
le = fcb->hardlinks.Flink;
while (le != &fcb->hardlinks) {
hl = CONTAINING_RECORD(le, hardlink, list_entry);
if (hl->parent == fr2->parent->fcb->inode && hl->index == fr2->oldindex) {
RemoveEntryList(&hl->list_entry);
if (hl->utf8.Buffer)
ExFreePool(hl->utf8.Buffer);
if (hl->name.Buffer)
ExFreePool(hl->name.Buffer);
ExFreePool(hl);
break;
}
le = le->Flink;
}
// update inode's INODE_ITEM
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
if (fcb != Vcb->dummy_fcb && (fileref->parent->fcb->subvol == fcb->subvol || !is_subvol_readonly(fcb->subvol, Irp))) {
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.sequence++;
if (!ccb->user_set_change_time)
fcb->inode_item.st_ctime = now;
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
}
// update new parent's INODE_ITEM
related->fcb->inode_item.transid = Vcb->superblock.generation;
TRACE("related->fcb->inode_item.st_size (inode %I64x) was %I64x\n", related->fcb->inode, related->fcb->inode_item.st_size);
related->fcb->inode_item.st_size += 2 * utf8len;
TRACE("related->fcb->inode_item.st_size (inode %I64x) now %I64x\n", related->fcb->inode, related->fcb->inode_item.st_size);
related->fcb->inode_item.sequence++;
related->fcb->inode_item.st_ctime = now;
related->fcb->inode_item.st_mtime = now;
related->fcb->inode_item_changed = true;
mark_fcb_dirty(related->fcb);
// update old parent's INODE_ITEM
fr2->parent->fcb->inode_item.transid = Vcb->superblock.generation;
TRACE("fr2->parent->fcb->inode_item.st_size (inode %I64x) was %I64x\n", fr2->parent->fcb->inode, fr2->parent->fcb->inode_item.st_size);
fr2->parent->fcb->inode_item.st_size -= 2 * origutf8len;
TRACE("fr2->parent->fcb->inode_item.st_size (inode %I64x) now %I64x\n", fr2->parent->fcb->inode, fr2->parent->fcb->inode_item.st_size);
fr2->parent->fcb->inode_item.sequence++;
fr2->parent->fcb->inode_item.st_ctime = now;
fr2->parent->fcb->inode_item.st_mtime = now;
free_fileref(fr2);
fr2->parent->fcb->inode_item_changed = true;
mark_fcb_dirty(fr2->parent->fcb);
send_notification_fileref(fileref, fcb->type == BTRFS_TYPE_DIRECTORY ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED, NULL);
send_notification_fileref(related, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
send_notification_fileref(fr2->parent, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end:
if (oldfileref)
free_fileref(oldfileref);
if (!NT_SUCCESS(Status) && related)
free_fileref(related);
if (!NT_SUCCESS(Status) && fr2)
free_fileref(fr2);
if (NT_SUCCESS(Status))
clear_rollback(&rollback);
else
do_rollback(Vcb, &rollback);
ExReleaseResourceLite(fcb->Header.Resource);
ExReleaseResourceLite(&Vcb->fileref_lock);
ExReleaseResourceLite(&Vcb->tree_lock);
return Status;
}
NTSTATUS stream_set_end_of_file_information(device_extension* Vcb, uint16_t end, fcb* fcb, file_ref* fileref, bool advance_only) {
LARGE_INTEGER time;
BTRFS_TIME now;
TRACE("setting new end to %x bytes (currently %x)\n", end, fcb->adsdata.Length);
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
return STATUS_INTERNAL_ERROR;
}
if (end < fcb->adsdata.Length) {
if (advance_only)
return STATUS_SUCCESS;
TRACE("truncating stream to %x bytes\n", end);
fcb->adsdata.Length = end;
} else if (end > fcb->adsdata.Length) {
TRACE("extending stream to %x bytes\n", end);
if (end > fcb->adsmaxlen) {
ERR("error - xattr too long (%u > %lu)\n", end, fcb->adsmaxlen);
return STATUS_DISK_FULL;
}
if (end > fcb->adsdata.MaximumLength) {
char* data = ExAllocatePoolWithTag(PagedPool, end, ALLOC_TAG);
if (!data) {
ERR("out of memory\n");
ExFreePool(data);
return STATUS_INSUFFICIENT_RESOURCES;
}
if (fcb->adsdata.Buffer) {
RtlCopyMemory(data, fcb->adsdata.Buffer, fcb->adsdata.Length);
ExFreePool(fcb->adsdata.Buffer);
}
fcb->adsdata.Buffer = data;
fcb->adsdata.MaximumLength = end;
}
RtlZeroMemory(&fcb->adsdata.Buffer[fcb->adsdata.Length], end - fcb->adsdata.Length);
fcb->adsdata.Length = end;
}
mark_fcb_dirty(fcb);
fcb->Header.AllocationSize.QuadPart = end;
fcb->Header.FileSize.QuadPart = end;
fcb->Header.ValidDataLength.QuadPart = end;
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
fileref->parent->fcb->inode_item.transid = Vcb->superblock.generation;
fileref->parent->fcb->inode_item.sequence++;
fileref->parent->fcb->inode_item.st_ctime = now;
fileref->parent->fcb->inode_item_changed = true;
mark_fcb_dirty(fileref->parent->fcb);
fileref->parent->fcb->subvol->root_item.ctransid = Vcb->superblock.generation;
fileref->parent->fcb->subvol->root_item.ctime = now;
return STATUS_SUCCESS;
}
static NTSTATUS set_end_of_file_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject, bool advance_only, bool prealloc) {
FILE_END_OF_FILE_INFORMATION* feofi = Irp->AssociatedIrp.SystemBuffer;
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref* fileref = ccb ? ccb->fileref : NULL;
NTSTATUS Status;
LARGE_INTEGER time;
CC_FILE_SIZES ccfs;
LIST_ENTRY rollback;
bool set_size = false;
ULONG filter;
if (!fileref) {
ERR("fileref is NULL\n");
return STATUS_INVALID_PARAMETER;
}
InitializeListHead(&rollback);
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fileref ? fileref->deleted : fcb->deleted) {
Status = STATUS_FILE_CLOSED;
goto end;
}
if (fcb->ads) {
if (feofi->EndOfFile.QuadPart > 0xffff) {
Status = STATUS_DISK_FULL;
goto end;
}
if (feofi->EndOfFile.QuadPart < 0) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
Status = stream_set_end_of_file_information(Vcb, (uint16_t)feofi->EndOfFile.QuadPart, fcb, fileref, advance_only);
if (NT_SUCCESS(Status)) {
ccfs.AllocationSize = fcb->Header.AllocationSize;
ccfs.FileSize = fcb->Header.FileSize;
ccfs.ValidDataLength = fcb->Header.ValidDataLength;
set_size = true;
}
filter = FILE_NOTIFY_CHANGE_STREAM_SIZE;
if (!ccb->user_set_write_time) {
KeQuerySystemTime(&time);
win_time_to_unix(time, &fileref->parent->fcb->inode_item.st_mtime);
filter |= FILE_NOTIFY_CHANGE_LAST_WRITE;
fileref->parent->fcb->inode_item_changed = true;
mark_fcb_dirty(fileref->parent->fcb);
}
queue_notification_fcb(fileref->parent, filter, FILE_ACTION_MODIFIED_STREAM, &fileref->dc->name);
goto end;
}
TRACE("file: %p\n", FileObject);
TRACE("paging IO: %s\n", Irp->Flags & IRP_PAGING_IO ? "true" : "false");
TRACE("FileObject: AllocationSize = %I64x, FileSize = %I64x, ValidDataLength = %I64x\n",
fcb->Header.AllocationSize.QuadPart, fcb->Header.FileSize.QuadPart, fcb->Header.ValidDataLength.QuadPart);
TRACE("setting new end to %I64x bytes (currently %I64x)\n", feofi->EndOfFile.QuadPart, fcb->inode_item.st_size);
if ((uint64_t)feofi->EndOfFile.QuadPart < fcb->inode_item.st_size) {
if (advance_only) {
Status = STATUS_SUCCESS;
goto end;
}
TRACE("truncating file to %I64x bytes\n", feofi->EndOfFile.QuadPart);
if (!MmCanFileBeTruncated(&fcb->nonpaged->segment_object, &feofi->EndOfFile)) {
Status = STATUS_USER_MAPPED_FILE;
goto end;
}
Status = truncate_file(fcb, feofi->EndOfFile.QuadPart, Irp, &rollback);
if (!NT_SUCCESS(Status)) {
ERR("error - truncate_file failed\n");
goto end;
}
} else if ((uint64_t)feofi->EndOfFile.QuadPart > fcb->inode_item.st_size) {
TRACE("extending file to %I64x bytes\n", feofi->EndOfFile.QuadPart);
Status = extend_file(fcb, fileref, feofi->EndOfFile.QuadPart, prealloc, NULL, &rollback);
if (!NT_SUCCESS(Status)) {
ERR("error - extend_file failed\n");
goto end;
}
} else if ((uint64_t)feofi->EndOfFile.QuadPart == fcb->inode_item.st_size && advance_only) {
Status = STATUS_SUCCESS;
goto end;
}
ccfs.AllocationSize = fcb->Header.AllocationSize;
ccfs.FileSize = fcb->Header.FileSize;
ccfs.ValidDataLength = fcb->Header.ValidDataLength;
set_size = true;
filter = FILE_NOTIFY_CHANGE_SIZE;
if (!ccb->user_set_write_time) {
KeQuerySystemTime(&time);
win_time_to_unix(time, &fcb->inode_item.st_mtime);
filter |= FILE_NOTIFY_CHANGE_LAST_WRITE;
}
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
queue_notification_fcb(fileref, filter, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end:
if (NT_SUCCESS(Status))
clear_rollback(&rollback);
else
do_rollback(Vcb, &rollback);
ExReleaseResourceLite(fcb->Header.Resource);
if (set_size) {
_SEH2_TRY {
CcSetFileSizes(FileObject, &ccfs);
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
Status = _SEH2_GetExceptionCode();
} _SEH2_END;
if (!NT_SUCCESS(Status))
ERR("CcSetFileSizes threw exception %08lx\n", Status);
}
ExReleaseResourceLite(&Vcb->tree_lock);
return Status;
}
static NTSTATUS set_position_information(PFILE_OBJECT FileObject, PIRP Irp) {
FILE_POSITION_INFORMATION* fpi = (FILE_POSITION_INFORMATION*)Irp->AssociatedIrp.SystemBuffer;
TRACE("setting the position on %p to %I64x\n", FileObject, fpi->CurrentByteOffset.QuadPart);
// FIXME - make sure aligned for FO_NO_INTERMEDIATE_BUFFERING
FileObject->CurrentByteOffset = fpi->CurrentByteOffset;
return STATUS_SUCCESS;
}
static NTSTATUS set_link_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject, PFILE_OBJECT tfo, bool ex) {
FILE_LINK_INFORMATION_EX* fli = Irp->AssociatedIrp.SystemBuffer;
fcb *fcb = FileObject->FsContext, *tfofcb, *parfcb;
ccb* ccb = FileObject->FsContext2;
file_ref *fileref = ccb ? ccb->fileref : NULL, *oldfileref = NULL, *related = NULL, *fr2 = NULL;
WCHAR* fn;
ULONG fnlen, utf8len;
UNICODE_STRING fnus;
ANSI_STRING utf8;
NTSTATUS Status;
LARGE_INTEGER time;
BTRFS_TIME now;
LIST_ENTRY rollback;
hardlink* hl;
ACCESS_MASK access;
SECURITY_SUBJECT_CONTEXT subjcont;
dir_child* dc = NULL;
ULONG flags;
InitializeListHead(&rollback);
// FIXME - check fli length
// FIXME - don't ignore fli->RootDirectory
if (ex)
flags = fli->Flags;
else
flags = fli->ReplaceIfExists ? FILE_LINK_REPLACE_IF_EXISTS : 0;
TRACE("flags = %lx\n", flags);
TRACE("RootDirectory = %p\n", fli->RootDirectory);
TRACE("FileNameLength = %lx\n", fli->FileNameLength);
TRACE("FileName = %.*S\n", (int)(fli->FileNameLength / sizeof(WCHAR)), fli->FileName);
fn = fli->FileName;
fnlen = fli->FileNameLength / sizeof(WCHAR);
if (!tfo) {
if (!fileref || !fileref->parent) {
ERR("no fileref set and no directory given\n");
return STATUS_INVALID_PARAMETER;
}
parfcb = fileref->parent->fcb;
tfofcb = NULL;
} else {
LONG i;
tfofcb = tfo->FsContext;
parfcb = tfofcb;
while (fnlen > 0 && (fli->FileName[fnlen - 1] == '/' || fli->FileName[fnlen - 1] == '\\'))
fnlen--;
if (fnlen == 0)
return STATUS_INVALID_PARAMETER;
for (i = fnlen - 1; i >= 0; i--) {
if (fli->FileName[i] == '\\' || fli->FileName[i] == '/') {
fn = &fli->FileName[i+1];
fnlen = (fli->FileNameLength / sizeof(WCHAR)) - i - 1;
break;
}
}
}
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
ExAcquireResourceExclusiveLite(&Vcb->fileref_lock, true);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fcb->type == BTRFS_TYPE_DIRECTORY) {
WARN("tried to create hard link on directory\n");
Status = STATUS_FILE_IS_A_DIRECTORY;
goto end;
}
if (fcb->ads) {
WARN("tried to create hard link on stream\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (fcb->inode_item.st_nlink >= 65535) {
Status = STATUS_TOO_MANY_LINKS;
goto end;
}
fnus.Buffer = fn;
fnus.Length = fnus.MaximumLength = (uint16_t)(fnlen * sizeof(WCHAR));
TRACE("fnus = %.*S\n", (int)(fnus.Length / sizeof(WCHAR)), fnus.Buffer);
Status = utf16_to_utf8(NULL, 0, &utf8len, fn, (ULONG)fnlen * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
goto end;
utf8.MaximumLength = utf8.Length = (uint16_t)utf8len;
utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8.MaximumLength, ALLOC_TAG);
if (!utf8.Buffer) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
Status = utf16_to_utf8(utf8.Buffer, utf8len, &utf8len, fn, (ULONG)fnlen * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
goto end;
if (tfo && tfo->FsContext2) {
struct _ccb* relatedccb = tfo->FsContext2;
related = relatedccb->fileref;
increase_fileref_refcount(related);
}
Status = open_fileref(Vcb, &oldfileref, &fnus, related, false, NULL, NULL, PagedPool, ccb->case_sensitive, Irp);
if (NT_SUCCESS(Status)) {
if (!oldfileref->deleted) {
WARN("destination file already exists\n");
if (!(flags & FILE_LINK_REPLACE_IF_EXISTS)) {
Status = STATUS_OBJECT_NAME_COLLISION;
goto end;
} else if (fileref == oldfileref) {
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (!(flags & FILE_LINK_POSIX_SEMANTICS) && (oldfileref->open_count > 0 || has_open_children(oldfileref)) && !oldfileref->deleted) {
WARN("trying to overwrite open file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (!(flags & FILE_LINK_IGNORE_READONLY_ATTRIBUTE) && oldfileref->fcb->atts & FILE_ATTRIBUTE_READONLY) {
WARN("trying to overwrite readonly file\n");
Status = STATUS_ACCESS_DENIED;
goto end;
} else if (oldfileref->fcb->type == BTRFS_TYPE_DIRECTORY) {
WARN("trying to overwrite directory\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
} else {
free_fileref(oldfileref);
oldfileref = NULL;
}
}
if (!related) {
Status = open_fileref(Vcb, &related, &fnus, NULL, true, NULL, NULL, PagedPool, ccb->case_sensitive, Irp);
if (!NT_SUCCESS(Status)) {
ERR("open_fileref returned %08lx\n", Status);
goto end;
}
}
SeCaptureSubjectContext(&subjcont);
if (!SeAccessCheck(related->fcb->sd, &subjcont, false, FILE_ADD_FILE, 0, NULL,
IoGetFileObjectGenericMapping(), Irp->RequestorMode, &access, &Status)) {
SeReleaseSubjectContext(&subjcont);
TRACE("SeAccessCheck failed, returning %08lx\n", Status);
goto end;
}
SeReleaseSubjectContext(&subjcont);
if (fcb->subvol != parfcb->subvol) {
WARN("can't create hard link over subvolume boundary\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (oldfileref) {
SeCaptureSubjectContext(&subjcont);
if (!SeAccessCheck(oldfileref->fcb->sd, &subjcont, false, DELETE, 0, NULL,
IoGetFileObjectGenericMapping(), Irp->RequestorMode, &access, &Status)) {
SeReleaseSubjectContext(&subjcont);
TRACE("SeAccessCheck failed, returning %08lx\n", Status);
goto end;
}
SeReleaseSubjectContext(&subjcont);
if (oldfileref->open_count > 0 && flags & FILE_RENAME_POSIX_SEMANTICS) {
oldfileref->delete_on_close = true;
oldfileref->posix_delete = true;
}
Status = delete_fileref(oldfileref, NULL, oldfileref->open_count > 0 && flags & FILE_RENAME_POSIX_SEMANTICS, Irp, &rollback);
if (!NT_SUCCESS(Status)) {
ERR("delete_fileref returned %08lx\n", Status);
goto end;
}
}
fr2 = create_fileref(Vcb);
fr2->fcb = fcb;
fcb->refcount++;
fr2->created = true;
fr2->parent = related;
Status = add_dir_child(related->fcb, fcb->inode, false, &utf8, &fnus, fcb->type, &dc);
if (!NT_SUCCESS(Status))
WARN("add_dir_child returned %08lx\n", Status);
fr2->dc = dc;
dc->fileref = fr2;
ExAcquireResourceExclusiveLite(&related->fcb->nonpaged->dir_children_lock, true);
InsertTailList(&related->children, &fr2->list_entry);
ExReleaseResourceLite(&related->fcb->nonpaged->dir_children_lock);
// add hardlink for existing fileref, if it's not there already
if (IsListEmpty(&fcb->hardlinks)) {
hl = ExAllocatePoolWithTag(PagedPool, sizeof(hardlink), ALLOC_TAG);
if (!hl) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
hl->parent = fileref->parent->fcb->inode;
hl->index = fileref->dc->index;
hl->name.Length = hl->name.MaximumLength = fnus.Length;
hl->name.Buffer = ExAllocatePoolWithTag(PagedPool, fnus.Length, ALLOC_TAG);
if (!hl->name.Buffer) {
ERR("out of memory\n");
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->name.Buffer, fnus.Buffer, fnus.Length);
hl->utf8.Length = hl->utf8.MaximumLength = fileref->dc->utf8.Length;
hl->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, hl->utf8.MaximumLength, ALLOC_TAG);
if (!hl->utf8.Buffer) {
ERR("out of memory\n");
ExFreePool(hl->name.Buffer);
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->utf8.Buffer, fileref->dc->utf8.Buffer, fileref->dc->utf8.Length);
InsertTailList(&fcb->hardlinks, &hl->list_entry);
}
hl = ExAllocatePoolWithTag(PagedPool, sizeof(hardlink), ALLOC_TAG);
if (!hl) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
hl->parent = related->fcb->inode;
hl->index = dc->index;
hl->name.Length = hl->name.MaximumLength = fnus.Length;
hl->name.Buffer = ExAllocatePoolWithTag(PagedPool, hl->name.MaximumLength, ALLOC_TAG);
if (!hl->name.Buffer) {
ERR("out of memory\n");
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->name.Buffer, fnus.Buffer, fnus.Length);
hl->utf8.Length = hl->utf8.MaximumLength = utf8.Length;
hl->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, hl->utf8.MaximumLength, ALLOC_TAG);
if (!hl->utf8.Buffer) {
ERR("out of memory\n");
ExFreePool(hl->name.Buffer);
ExFreePool(hl);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end;
}
RtlCopyMemory(hl->utf8.Buffer, utf8.Buffer, utf8.Length);
ExFreePool(utf8.Buffer);
InsertTailList(&fcb->hardlinks, &hl->list_entry);
mark_fileref_dirty(fr2);
free_fileref(fr2);
// update inode's INODE_ITEM
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.sequence++;
fcb->inode_item.st_nlink++;
if (!ccb->user_set_change_time)
fcb->inode_item.st_ctime = now;
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
// update parent's INODE_ITEM
parfcb->inode_item.transid = Vcb->superblock.generation;
TRACE("parfcb->inode_item.st_size (inode %I64x) was %I64x\n", parfcb->inode, parfcb->inode_item.st_size);
parfcb->inode_item.st_size += 2 * utf8len;
TRACE("parfcb->inode_item.st_size (inode %I64x) now %I64x\n", parfcb->inode, parfcb->inode_item.st_size);
parfcb->inode_item.sequence++;
parfcb->inode_item.st_ctime = now;
parfcb->inode_item_changed = true;
mark_fcb_dirty(parfcb);
send_notification_fileref(fr2, FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED, NULL);
Status = STATUS_SUCCESS;
end:
if (oldfileref)
free_fileref(oldfileref);
if (!NT_SUCCESS(Status) && related)
free_fileref(related);
if (!NT_SUCCESS(Status) && fr2)
free_fileref(fr2);
if (NT_SUCCESS(Status))
clear_rollback(&rollback);
else
do_rollback(Vcb, &rollback);
ExReleaseResourceLite(fcb->Header.Resource);
ExReleaseResourceLite(&Vcb->fileref_lock);
ExReleaseResourceLite(&Vcb->tree_lock);
return Status;
}
static NTSTATUS set_valid_data_length_information(device_extension* Vcb, PIRP Irp, PFILE_OBJECT FileObject) {
FILE_VALID_DATA_LENGTH_INFORMATION* fvdli = Irp->AssociatedIrp.SystemBuffer;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref* fileref = ccb ? ccb->fileref : NULL;
NTSTATUS Status;
LARGE_INTEGER time;
CC_FILE_SIZES ccfs;
LIST_ENTRY rollback;
bool set_size = false;
ULONG filter;
if (IrpSp->Parameters.SetFile.Length < sizeof(FILE_VALID_DATA_LENGTH_INFORMATION)) {
ERR("input buffer length was %lu, expected %Iu\n", IrpSp->Parameters.SetFile.Length, sizeof(FILE_VALID_DATA_LENGTH_INFORMATION));
return STATUS_INVALID_PARAMETER;
}
if (!fileref) {
ERR("fileref is NULL\n");
return STATUS_INVALID_PARAMETER;
}
InitializeListHead(&rollback);
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fcb->atts & FILE_ATTRIBUTE_SPARSE_FILE) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (fvdli->ValidDataLength.QuadPart <= fcb->Header.ValidDataLength.QuadPart || fvdli->ValidDataLength.QuadPart > fcb->Header.FileSize.QuadPart) {
TRACE("invalid VDL of %I64u (current VDL = %I64u, file size = %I64u)\n", fvdli->ValidDataLength.QuadPart,
fcb->Header.ValidDataLength.QuadPart, fcb->Header.FileSize.QuadPart);
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (fileref ? fileref->deleted : fcb->deleted) {
Status = STATUS_FILE_CLOSED;
goto end;
}
// This function doesn't really do anything - the fsctl can only increase the value of ValidDataLength,
// and we set it to the max anyway.
ccfs.AllocationSize = fcb->Header.AllocationSize;
ccfs.FileSize = fcb->Header.FileSize;
ccfs.ValidDataLength = fvdli->ValidDataLength;
set_size = true;
filter = FILE_NOTIFY_CHANGE_SIZE;
if (!ccb->user_set_write_time) {
KeQuerySystemTime(&time);
win_time_to_unix(time, &fcb->inode_item.st_mtime);
filter |= FILE_NOTIFY_CHANGE_LAST_WRITE;
}
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
queue_notification_fcb(fileref, filter, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end:
if (NT_SUCCESS(Status))
clear_rollback(&rollback);
else
do_rollback(Vcb, &rollback);
ExReleaseResourceLite(fcb->Header.Resource);
if (set_size) {
_SEH2_TRY {
CcSetFileSizes(FileObject, &ccfs);
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
Status = _SEH2_GetExceptionCode();
} _SEH2_END;
if (!NT_SUCCESS(Status))
ERR("CcSetFileSizes threw exception %08lx\n", Status);
else
fcb->Header.AllocationSize = ccfs.AllocationSize;
}
ExReleaseResourceLite(&Vcb->tree_lock);
return Status;
}
#ifndef __REACTOS__
static NTSTATUS set_case_sensitive_information(PIRP Irp) {
FILE_CASE_SENSITIVE_INFORMATION* fcsi = (FILE_CASE_SENSITIVE_INFORMATION*)Irp->AssociatedIrp.SystemBuffer;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
if (IrpSp->Parameters.FileSystemControl.InputBufferLength < sizeof(FILE_CASE_SENSITIVE_INFORMATION))
return STATUS_INFO_LENGTH_MISMATCH;
PFILE_OBJECT FileObject = IrpSp->FileObject;
if (!FileObject)
return STATUS_INVALID_PARAMETER;
fcb* fcb = FileObject->FsContext;
if (!fcb)
return STATUS_INVALID_PARAMETER;
if (!(fcb->atts & FILE_ATTRIBUTE_DIRECTORY)) {
WARN("cannot set case-sensitive flag on anything other than directory\n");
return STATUS_INVALID_PARAMETER;
}
ExAcquireResourceSharedLite(&fcb->Vcb->tree_lock, true);
fcb->case_sensitive = fcsi->Flags & FILE_CS_FLAG_CASE_SENSITIVE_DIR;
mark_fcb_dirty(fcb);
ExReleaseResourceLite(&fcb->Vcb->tree_lock);
return STATUS_SUCCESS;
}
#endif
_Dispatch_type_(IRP_MJ_SET_INFORMATION)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS __stdcall drv_set_information(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
device_extension* Vcb = DeviceObject->DeviceExtension;
fcb* fcb = IrpSp->FileObject->FsContext;
ccb* ccb = IrpSp->FileObject->FsContext2;
bool top_level;
FsRtlEnterFileSystem();
top_level = is_top_level(Irp);
Irp->IoStatus.Information = 0;
if (Vcb && Vcb->type == VCB_TYPE_VOLUME) {
Status = vol_set_information(DeviceObject, Irp);
goto end;
} else if (!Vcb || Vcb->type != VCB_TYPE_FS) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (!(Vcb->Vpb->Flags & VPB_MOUNTED)) {
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (Vcb->readonly && IrpSp->Parameters.SetFile.FileInformationClass != FilePositionInformation) {
Status = STATUS_MEDIA_WRITE_PROTECTED;
goto end;
}
if (!fcb) {
ERR("no fcb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (!ccb) {
ERR("no ccb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (fcb != Vcb->dummy_fcb && is_subvol_readonly(fcb->subvol, Irp) && IrpSp->Parameters.SetFile.FileInformationClass != FilePositionInformation &&
#ifndef __REACTOS__
(fcb->inode != SUBVOL_ROOT_INODE || (IrpSp->Parameters.SetFile.FileInformationClass != FileBasicInformation && IrpSp->Parameters.SetFile.FileInformationClass != FileRenameInformation && IrpSp->Parameters.SetFile.FileInformationClass != FileRenameInformationEx))) {
#else
(fcb->inode != SUBVOL_ROOT_INODE || (IrpSp->Parameters.SetFile.FileInformationClass != FileBasicInformation && IrpSp->Parameters.SetFile.FileInformationClass != FileRenameInformation))) {
#endif
Status = STATUS_ACCESS_DENIED;
goto end;
}
Status = STATUS_NOT_IMPLEMENTED;
TRACE("set information\n");
FsRtlCheckOplock(fcb_oplock(fcb), Irp, NULL, NULL, NULL);
switch (IrpSp->Parameters.SetFile.FileInformationClass) {
case FileAllocationInformation:
{
TRACE("FileAllocationInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & FILE_WRITE_DATA)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_end_of_file_information(Vcb, Irp, IrpSp->FileObject, false, true);
break;
}
case FileBasicInformation:
{
TRACE("FileBasicInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & FILE_WRITE_ATTRIBUTES)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_basic_information(Vcb, Irp, IrpSp->FileObject);
break;
}
case FileDispositionInformation:
{
TRACE("FileDispositionInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & DELETE)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_disposition_information(Vcb, Irp, IrpSp->FileObject, false);
break;
}
case FileEndOfFileInformation:
{
TRACE("FileEndOfFileInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & (FILE_WRITE_DATA | FILE_APPEND_DATA))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_end_of_file_information(Vcb, Irp, IrpSp->FileObject, IrpSp->Parameters.SetFile.AdvanceOnly, false);
break;
}
case FileLinkInformation:
TRACE("FileLinkInformation\n");
Status = set_link_information(Vcb, Irp, IrpSp->FileObject, IrpSp->Parameters.SetFile.FileObject, false);
break;
case FilePositionInformation:
TRACE("FilePositionInformation\n");
Status = set_position_information(IrpSp->FileObject, Irp);
break;
case FileRenameInformation:
TRACE("FileRenameInformation\n");
Status = set_rename_information(Vcb, Irp, IrpSp->FileObject, IrpSp->Parameters.SetFile.FileObject, false);
break;
case FileValidDataLengthInformation:
{
TRACE("FileValidDataLengthInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & (FILE_WRITE_DATA | FILE_APPEND_DATA))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_valid_data_length_information(Vcb, Irp, IrpSp->FileObject);
break;
}
#ifndef __REACTOS__
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch"
#endif
case FileDispositionInformationEx:
{
TRACE("FileDispositionInformationEx\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & DELETE)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_disposition_information(Vcb, Irp, IrpSp->FileObject, true);
break;
}
case FileRenameInformationEx:
TRACE("FileRenameInformationEx\n");
Status = set_rename_information(Vcb, Irp, IrpSp->FileObject, IrpSp->Parameters.SetFile.FileObject, true);
break;
case FileLinkInformationEx:
TRACE("FileLinkInformationEx\n");
Status = set_link_information(Vcb, Irp, IrpSp->FileObject, IrpSp->Parameters.SetFile.FileObject, true);
break;
case FileCaseSensitiveInformation:
TRACE("FileCaseSensitiveInformation\n");
if (Irp->RequestorMode == UserMode && !(ccb->access & FILE_WRITE_ATTRIBUTES)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
break;
}
Status = set_case_sensitive_information(Irp);
break;
case FileStorageReserveIdInformation:
WARN("unimplemented FileInformationClass FileStorageReserveIdInformation\n");
break;
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif
#endif
default:
WARN("unknown FileInformationClass %u\n", IrpSp->Parameters.SetFile.FileInformationClass);
}
end:
Irp->IoStatus.Status = Status;
TRACE("returning %08lx\n", Status);
IoCompleteRequest(Irp, IO_NO_INCREMENT);
if (top_level)
IoSetTopLevelIrp(NULL);
FsRtlExitFileSystem();
return Status;
}
static NTSTATUS fill_in_file_basic_information(FILE_BASIC_INFORMATION* fbi, INODE_ITEM* ii, LONG* length, fcb* fcb, file_ref* fileref) {
RtlZeroMemory(fbi, sizeof(FILE_BASIC_INFORMATION));
*length -= sizeof(FILE_BASIC_INFORMATION);
if (fcb == fcb->Vcb->dummy_fcb) {
LARGE_INTEGER time;
KeQuerySystemTime(&time);
fbi->CreationTime = fbi->LastAccessTime = fbi->LastWriteTime = fbi->ChangeTime = time;
} else {
fbi->CreationTime.QuadPart = unix_time_to_win(&ii->otime);
fbi->LastAccessTime.QuadPart = unix_time_to_win(&ii->st_atime);
fbi->LastWriteTime.QuadPart = unix_time_to_win(&ii->st_mtime);
fbi->ChangeTime.QuadPart = unix_time_to_win(&ii->st_ctime);
}
if (fcb->ads) {
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
return STATUS_INTERNAL_ERROR;
} else
fbi->FileAttributes = fileref->parent->fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fileref->parent->fcb->atts;
} else
fbi->FileAttributes = fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fcb->atts;
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_network_open_information(FILE_NETWORK_OPEN_INFORMATION* fnoi, fcb* fcb, file_ref* fileref, LONG* length) {
INODE_ITEM* ii;
if (*length < (LONG)sizeof(FILE_NETWORK_OPEN_INFORMATION)) {
WARN("overflow\n");
return STATUS_BUFFER_OVERFLOW;
}
RtlZeroMemory(fnoi, sizeof(FILE_NETWORK_OPEN_INFORMATION));
*length -= sizeof(FILE_NETWORK_OPEN_INFORMATION);
if (fcb->ads) {
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
return STATUS_INTERNAL_ERROR;
}
ii = &fileref->parent->fcb->inode_item;
} else
ii = &fcb->inode_item;
if (fcb == fcb->Vcb->dummy_fcb) {
LARGE_INTEGER time;
KeQuerySystemTime(&time);
fnoi->CreationTime = fnoi->LastAccessTime = fnoi->LastWriteTime = fnoi->ChangeTime = time;
} else {
fnoi->CreationTime.QuadPart = unix_time_to_win(&ii->otime);
fnoi->LastAccessTime.QuadPart = unix_time_to_win(&ii->st_atime);
fnoi->LastWriteTime.QuadPart = unix_time_to_win(&ii->st_mtime);
fnoi->ChangeTime.QuadPart = unix_time_to_win(&ii->st_ctime);
}
if (fcb->ads) {
fnoi->AllocationSize.QuadPart = fnoi->EndOfFile.QuadPart = fcb->adsdata.Length;
fnoi->FileAttributes = fileref->parent->fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fileref->parent->fcb->atts;
} else {
fnoi->AllocationSize.QuadPart = fcb_alloc_size(fcb);
fnoi->EndOfFile.QuadPart = S_ISDIR(fcb->inode_item.st_mode) ? 0 : fcb->inode_item.st_size;
fnoi->FileAttributes = fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fcb->atts;
}
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_standard_information(FILE_STANDARD_INFORMATION* fsi, fcb* fcb, file_ref* fileref, LONG* length) {
RtlZeroMemory(fsi, sizeof(FILE_STANDARD_INFORMATION));
*length -= sizeof(FILE_STANDARD_INFORMATION);
if (fcb->ads) {
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
return STATUS_INTERNAL_ERROR;
}
fsi->AllocationSize.QuadPart = fsi->EndOfFile.QuadPart = fcb->adsdata.Length;
fsi->NumberOfLinks = fileref->parent->fcb->inode_item.st_nlink;
fsi->Directory = false;
} else {
fsi->AllocationSize.QuadPart = fcb_alloc_size(fcb);
fsi->EndOfFile.QuadPart = S_ISDIR(fcb->inode_item.st_mode) ? 0 : fcb->inode_item.st_size;
fsi->NumberOfLinks = fcb->inode_item.st_nlink;
fsi->Directory = S_ISDIR(fcb->inode_item.st_mode);
}
TRACE("length = %I64u\n", fsi->EndOfFile.QuadPart);
fsi->DeletePending = fileref ? fileref->delete_on_close : false;
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_internal_information(FILE_INTERNAL_INFORMATION* fii, fcb* fcb, LONG* length) {
*length -= sizeof(FILE_INTERNAL_INFORMATION);
fii->IndexNumber.QuadPart = make_file_id(fcb->subvol, fcb->inode);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_ea_information(FILE_EA_INFORMATION* eai, fcb* fcb, LONG* length) {
*length -= sizeof(FILE_EA_INFORMATION);
/* This value appears to be the size of the structure NTFS stores on disk, and not,
* as might be expected, the size of FILE_FULL_EA_INFORMATION (which is what we store).
* The formula is 4 bytes as a header, followed by 5 + NameLength + ValueLength for each
* item. */
eai->EaSize = fcb->ealen;
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_position_information(FILE_POSITION_INFORMATION* fpi, PFILE_OBJECT FileObject, LONG* length) {
RtlZeroMemory(fpi, sizeof(FILE_POSITION_INFORMATION));
*length -= sizeof(FILE_POSITION_INFORMATION);
fpi->CurrentByteOffset = FileObject->CurrentByteOffset;
return STATUS_SUCCESS;
}
NTSTATUS fileref_get_filename(file_ref* fileref, PUNICODE_STRING fn, USHORT* name_offset, ULONG* preqlen) {
file_ref* fr;
NTSTATUS Status;
ULONG reqlen = 0;
USHORT offset;
bool overflow = false;
// FIXME - we need a lock on filerefs' filepart
if (fileref == fileref->fcb->Vcb->root_fileref) {
if (fn->MaximumLength >= sizeof(WCHAR)) {
fn->Buffer[0] = '\\';
fn->Length = sizeof(WCHAR);
if (name_offset)
*name_offset = 0;
return STATUS_SUCCESS;
} else {
if (preqlen)
*preqlen = sizeof(WCHAR);
fn->Length = 0;
return STATUS_BUFFER_OVERFLOW;
}
}
fr = fileref;
offset = 0;
while (fr->parent) {
USHORT movelen;
if (!fr->dc)
return STATUS_INTERNAL_ERROR;
if (!overflow) {
if (fr->dc->name.Length + sizeof(WCHAR) + fn->Length > fn->MaximumLength)
overflow = true;
}
if (overflow)
movelen = fn->MaximumLength - fr->dc->name.Length - sizeof(WCHAR);
else
movelen = fn->Length;
if ((!overflow || fn->MaximumLength > fr->dc->name.Length + sizeof(WCHAR)) && movelen > 0) {
RtlMoveMemory(&fn->Buffer[(fr->dc->name.Length / sizeof(WCHAR)) + 1], fn->Buffer, movelen);
offset += fr->dc->name.Length + sizeof(WCHAR);
}
if (fn->MaximumLength >= sizeof(WCHAR)) {
fn->Buffer[0] = fr->fcb->ads ? ':' : '\\';
fn->Length += sizeof(WCHAR);
if (fn->MaximumLength > sizeof(WCHAR)) {
RtlCopyMemory(&fn->Buffer[1], fr->dc->name.Buffer, min(fr->dc->name.Length, fn->MaximumLength - sizeof(WCHAR)));
fn->Length += fr->dc->name.Length;
}
if (fn->Length > fn->MaximumLength) {
fn->Length = fn->MaximumLength;
overflow = true;
}
}
reqlen += sizeof(WCHAR) + fr->dc->name.Length;
fr = fr->parent;
}
offset += sizeof(WCHAR);
if (overflow) {
if (preqlen)
*preqlen = reqlen;
Status = STATUS_BUFFER_OVERFLOW;
} else {
if (name_offset)
*name_offset = offset;
Status = STATUS_SUCCESS;
}
return Status;
}
static NTSTATUS fill_in_file_name_information(FILE_NAME_INFORMATION* fni, fcb* fcb, file_ref* fileref, LONG* length) {
ULONG reqlen;
UNICODE_STRING fn;
NTSTATUS Status;
static const WCHAR datasuf[] = {':','$','D','A','T','A',0};
uint16_t datasuflen = sizeof(datasuf) - sizeof(WCHAR);
if (!fileref) {
ERR("called without fileref\n");
return STATUS_INVALID_PARAMETER;
}
*length -= (LONG)offsetof(FILE_NAME_INFORMATION, FileName[0]);
TRACE("maximum length is %li\n", *length);
fni->FileNameLength = 0;
fni->FileName[0] = 0;
fn.Buffer = fni->FileName;
fn.Length = 0;
fn.MaximumLength = (uint16_t)*length;
Status = fileref_get_filename(fileref, &fn, NULL, &reqlen);
if (!NT_SUCCESS(Status) && Status != STATUS_BUFFER_OVERFLOW) {
ERR("fileref_get_filename returned %08lx\n", Status);
return Status;
}
if (fcb->ads) {
if (Status == STATUS_BUFFER_OVERFLOW)
reqlen += datasuflen;
else {
if (fn.Length + datasuflen > fn.MaximumLength) {
RtlCopyMemory(&fn.Buffer[fn.Length / sizeof(WCHAR)], datasuf, fn.MaximumLength - fn.Length);
reqlen += datasuflen;
Status = STATUS_BUFFER_OVERFLOW;
} else {
RtlCopyMemory(&fn.Buffer[fn.Length / sizeof(WCHAR)], datasuf, datasuflen);
fn.Length += datasuflen;
}
}
}
if (Status == STATUS_BUFFER_OVERFLOW) {
*length = -1;
fni->FileNameLength = reqlen;
TRACE("%.*S (truncated)\n", (int)(fn.Length / sizeof(WCHAR)), fn.Buffer);
} else {
*length -= fn.Length;
fni->FileNameLength = fn.Length;
TRACE("%.*S\n", (int)(fn.Length / sizeof(WCHAR)), fn.Buffer);
}
return Status;
}
static NTSTATUS fill_in_file_attribute_information(FILE_ATTRIBUTE_TAG_INFORMATION* ati, fcb* fcb, ccb* ccb, LONG* length) {
*length -= sizeof(FILE_ATTRIBUTE_TAG_INFORMATION);
if (fcb->ads) {
if (!ccb->fileref || !ccb->fileref->parent) {
ERR("no fileref for stream\n");
return STATUS_INTERNAL_ERROR;
}
ati->FileAttributes = ccb->fileref->parent->fcb->atts;
} else
ati->FileAttributes = fcb->atts;
if (!(ati->FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT))
ati->ReparseTag = 0;
else
ati->ReparseTag = get_reparse_tag_fcb(fcb);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_stream_information(FILE_STREAM_INFORMATION* fsi, file_ref* fileref, LONG* length) {
LONG reqsize;
LIST_ENTRY* le;
FILE_STREAM_INFORMATION *entry, *lastentry;
NTSTATUS Status;
static const WCHAR datasuf[] = L":$DATA";
UNICODE_STRING suf;
if (!fileref) {
ERR("fileref was NULL\n");
return STATUS_INVALID_PARAMETER;
}
suf.Buffer = (WCHAR*)datasuf;
suf.Length = suf.MaximumLength = sizeof(datasuf) - sizeof(WCHAR);
if (fileref->fcb->type != BTRFS_TYPE_DIRECTORY)
reqsize = sizeof(FILE_STREAM_INFORMATION) - sizeof(WCHAR) + suf.Length + sizeof(WCHAR);
else
reqsize = 0;
ExAcquireResourceSharedLite(&fileref->fcb->nonpaged->dir_children_lock, true);
le = fileref->fcb->dir_children_index.Flink;
while (le != &fileref->fcb->dir_children_index) {
dir_child* dc = CONTAINING_RECORD(le, dir_child, list_entry_index);
if (dc->index == 0) {
reqsize = (ULONG)sector_align(reqsize, sizeof(LONGLONG));
reqsize += sizeof(FILE_STREAM_INFORMATION) - sizeof(WCHAR) + suf.Length + sizeof(WCHAR) + dc->name.Length;
} else
break;
le = le->Flink;
}
TRACE("length = %li, reqsize = %lu\n", *length, reqsize);
if (reqsize > *length) {
Status = STATUS_BUFFER_OVERFLOW;
goto end;
}
entry = fsi;
lastentry = NULL;
if (fileref->fcb->type != BTRFS_TYPE_DIRECTORY) {
ULONG off;
entry->NextEntryOffset = 0;
entry->StreamNameLength = suf.Length + sizeof(WCHAR);
entry->StreamSize.QuadPart = fileref->fcb->inode_item.st_size;
entry->StreamAllocationSize.QuadPart = fcb_alloc_size(fileref->fcb);
entry->StreamName[0] = ':';
RtlCopyMemory(&entry->StreamName[1], suf.Buffer, suf.Length);
off = (ULONG)sector_align(sizeof(FILE_STREAM_INFORMATION) - sizeof(WCHAR) + suf.Length + sizeof(WCHAR), sizeof(LONGLONG));
lastentry = entry;
entry = (FILE_STREAM_INFORMATION*)((uint8_t*)entry + off);
}
le = fileref->fcb->dir_children_index.Flink;
while (le != &fileref->fcb->dir_children_index) {
dir_child* dc = CONTAINING_RECORD(le, dir_child, list_entry_index);
if (dc->index == 0) {
ULONG off;
entry->NextEntryOffset = 0;
entry->StreamNameLength = dc->name.Length + suf.Length + sizeof(WCHAR);
if (dc->fileref)
entry->StreamSize.QuadPart = dc->fileref->fcb->adsdata.Length;
else
entry->StreamSize.QuadPart = dc->size;
entry->StreamAllocationSize.QuadPart = entry->StreamSize.QuadPart;
entry->StreamName[0] = ':';
RtlCopyMemory(&entry->StreamName[1], dc->name.Buffer, dc->name.Length);
RtlCopyMemory(&entry->StreamName[1 + (dc->name.Length / sizeof(WCHAR))], suf.Buffer, suf.Length);
if (lastentry)
lastentry->NextEntryOffset = (uint32_t)((uint8_t*)entry - (uint8_t*)lastentry);
off = (ULONG)sector_align(sizeof(FILE_STREAM_INFORMATION) - sizeof(WCHAR) + suf.Length + sizeof(WCHAR) + dc->name.Length, sizeof(LONGLONG));
lastentry = entry;
entry = (FILE_STREAM_INFORMATION*)((uint8_t*)entry + off);
} else
break;
le = le->Flink;
}
*length -= reqsize;
Status = STATUS_SUCCESS;
end:
ExReleaseResourceLite(&fileref->fcb->nonpaged->dir_children_lock);
return Status;
}
#ifndef __REACTOS__
static NTSTATUS fill_in_file_standard_link_information(FILE_STANDARD_LINK_INFORMATION* fsli, fcb* fcb, file_ref* fileref, LONG* length) {
TRACE("FileStandardLinkInformation\n");
// FIXME - NumberOfAccessibleLinks should subtract open links which have been marked as delete_on_close
fsli->NumberOfAccessibleLinks = fcb->inode_item.st_nlink;
fsli->TotalNumberOfLinks = fcb->inode_item.st_nlink;
fsli->DeletePending = fileref ? fileref->delete_on_close : false;
fsli->Directory = (!fcb->ads && fcb->type == BTRFS_TYPE_DIRECTORY) ? true : false;
*length -= sizeof(FILE_STANDARD_LINK_INFORMATION);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_hard_link_information(FILE_LINKS_INFORMATION* fli, file_ref* fileref, PIRP Irp, LONG* length) {
NTSTATUS Status;
LIST_ENTRY* le;
LONG bytes_needed;
FILE_LINK_ENTRY_INFORMATION* feli;
bool overflow = false;
fcb* fcb = fileref->fcb;
ULONG len;
if (fcb->ads)
return STATUS_INVALID_PARAMETER;
if (*length < (LONG)offsetof(FILE_LINKS_INFORMATION, Entry))
return STATUS_INVALID_PARAMETER;
RtlZeroMemory(fli, *length);
bytes_needed = offsetof(FILE_LINKS_INFORMATION, Entry);
len = bytes_needed;
feli = NULL;
ExAcquireResourceSharedLite(fcb->Header.Resource, true);
if (fcb->inode == SUBVOL_ROOT_INODE) {
ULONG namelen;
if (fcb == fcb->Vcb->root_fileref->fcb)
namelen = sizeof(WCHAR);
else
namelen = fileref->dc->name.Length;
bytes_needed += sizeof(FILE_LINK_ENTRY_INFORMATION) - sizeof(WCHAR) + namelen;
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
feli = &fli->Entry;
feli->NextEntryOffset = 0;
feli->ParentFileId = 0; // we use an inode of 0 to mean the parent of a subvolume
if (fcb == fcb->Vcb->root_fileref->fcb) {
feli->FileNameLength = 1;
feli->FileName[0] = '.';
} else {
feli->FileNameLength = fileref->dc->name.Length / sizeof(WCHAR);
RtlCopyMemory(feli->FileName, fileref->dc->name.Buffer, fileref->dc->name.Length);
}
fli->EntriesReturned++;
len = bytes_needed;
}
} else {
ExAcquireResourceExclusiveLite(&fcb->Vcb->fileref_lock, true);
if (IsListEmpty(&fcb->hardlinks)) {
bytes_needed += sizeof(FILE_LINK_ENTRY_INFORMATION) + fileref->dc->name.Length - sizeof(WCHAR);
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
feli = &fli->Entry;
feli->NextEntryOffset = 0;
feli->ParentFileId = fileref->parent->fcb->inode;
feli->FileNameLength = fileref->dc->name.Length / sizeof(WCHAR);
RtlCopyMemory(feli->FileName, fileref->dc->name.Buffer, fileref->dc->name.Length);
fli->EntriesReturned++;
len = bytes_needed;
}
} else {
le = fcb->hardlinks.Flink;
while (le != &fcb->hardlinks) {
hardlink* hl = CONTAINING_RECORD(le, hardlink, list_entry);
file_ref* parfr;
TRACE("parent %I64x, index %I64x, name %.*S\n", hl->parent, hl->index, (int)(hl->name.Length / sizeof(WCHAR)), hl->name.Buffer);
Status = open_fileref_by_inode(fcb->Vcb, fcb->subvol, hl->parent, &parfr, Irp);
if (!NT_SUCCESS(Status)) {
ERR("open_fileref_by_inode returned %08lx\n", Status);
} else if (!parfr->deleted) {
LIST_ENTRY* le2;
bool found = false, deleted = false;
UNICODE_STRING* fn = NULL;
le2 = parfr->children.Flink;
while (le2 != &parfr->children) {
file_ref* fr2 = CONTAINING_RECORD(le2, file_ref, list_entry);
if (fr2->dc->index == hl->index) {
found = true;
deleted = fr2->deleted;
if (!deleted)
fn = &fr2->dc->name;
break;
}
le2 = le2->Flink;
}
if (!found)
fn = &hl->name;
if (!deleted) {
TRACE("fn = %.*S (found = %u)\n", (int)(fn->Length / sizeof(WCHAR)), fn->Buffer, found);
if (feli)
bytes_needed = (LONG)sector_align(bytes_needed, 8);
bytes_needed += sizeof(FILE_LINK_ENTRY_INFORMATION) + fn->Length - sizeof(WCHAR);
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
if (feli) {
feli->NextEntryOffset = (ULONG)sector_align(sizeof(FILE_LINK_ENTRY_INFORMATION) + ((feli->FileNameLength - 1) * sizeof(WCHAR)), 8);
feli = (FILE_LINK_ENTRY_INFORMATION*)((uint8_t*)feli + feli->NextEntryOffset);
} else
feli = &fli->Entry;
feli->NextEntryOffset = 0;
feli->ParentFileId = parfr->fcb->inode;
feli->FileNameLength = fn->Length / sizeof(WCHAR);
RtlCopyMemory(feli->FileName, fn->Buffer, fn->Length);
fli->EntriesReturned++;
len = bytes_needed;
}
}
free_fileref(parfr);
}
le = le->Flink;
}
}
ExReleaseResourceLite(&fcb->Vcb->fileref_lock);
}
fli->BytesNeeded = bytes_needed;
*length -= len;
Status = overflow ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
ExReleaseResourceLite(fcb->Header.Resource);
return Status;
}
static NTSTATUS fill_in_hard_link_full_id_information(FILE_LINKS_FULL_ID_INFORMATION* flfii, file_ref* fileref, PIRP Irp, LONG* length) {
NTSTATUS Status;
LIST_ENTRY* le;
LONG bytes_needed;
FILE_LINK_ENTRY_FULL_ID_INFORMATION* flefii;
bool overflow = false;
fcb* fcb = fileref->fcb;
ULONG len;
if (fcb->ads)
return STATUS_INVALID_PARAMETER;
if (*length < (LONG)offsetof(FILE_LINKS_FULL_ID_INFORMATION, Entry))
return STATUS_INVALID_PARAMETER;
RtlZeroMemory(flfii, *length);
bytes_needed = offsetof(FILE_LINKS_FULL_ID_INFORMATION, Entry);
len = bytes_needed;
flefii = NULL;
ExAcquireResourceSharedLite(fcb->Header.Resource, true);
if (fcb->inode == SUBVOL_ROOT_INODE) {
ULONG namelen;
if (fcb == fcb->Vcb->root_fileref->fcb)
namelen = sizeof(WCHAR);
else
namelen = fileref->dc->name.Length;
bytes_needed += offsetof(FILE_LINK_ENTRY_FULL_ID_INFORMATION, FileName[0]) + namelen;
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
flefii = &flfii->Entry;
flefii->NextEntryOffset = 0;
if (fcb == fcb->Vcb->root_fileref->fcb) {
RtlZeroMemory(&flefii->ParentFileId.Identifier[0], sizeof(FILE_ID_128));
flefii->FileNameLength = 1;
flefii->FileName[0] = '.';
} else {
RtlCopyMemory(&flefii->ParentFileId.Identifier[0], &fileref->parent->fcb->inode, sizeof(uint64_t));
RtlCopyMemory(&flefii->ParentFileId.Identifier[sizeof(uint64_t)], &fileref->parent->fcb->subvol->id, sizeof(uint64_t));
flefii->FileNameLength = fileref->dc->name.Length / sizeof(WCHAR);
RtlCopyMemory(flefii->FileName, fileref->dc->name.Buffer, fileref->dc->name.Length);
}
flfii->EntriesReturned++;
len = bytes_needed;
}
} else {
ExAcquireResourceExclusiveLite(&fcb->Vcb->fileref_lock, true);
if (IsListEmpty(&fcb->hardlinks)) {
bytes_needed += offsetof(FILE_LINK_ENTRY_FULL_ID_INFORMATION, FileName[0]) + fileref->dc->name.Length;
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
flefii = &flfii->Entry;
flefii->NextEntryOffset = 0;
RtlCopyMemory(&flefii->ParentFileId.Identifier[0], &fileref->parent->fcb->inode, sizeof(uint64_t));
RtlCopyMemory(&flefii->ParentFileId.Identifier[sizeof(uint64_t)], &fileref->parent->fcb->subvol->id, sizeof(uint64_t));
flefii->FileNameLength = fileref->dc->name.Length / sizeof(WCHAR);
RtlCopyMemory(flefii->FileName, fileref->dc->name.Buffer, fileref->dc->name.Length);
flfii->EntriesReturned++;
len = bytes_needed;
}
} else {
le = fcb->hardlinks.Flink;
while (le != &fcb->hardlinks) {
hardlink* hl = CONTAINING_RECORD(le, hardlink, list_entry);
file_ref* parfr;
TRACE("parent %I64x, index %I64x, name %.*S\n", hl->parent, hl->index, (int)(hl->name.Length / sizeof(WCHAR)), hl->name.Buffer);
Status = open_fileref_by_inode(fcb->Vcb, fcb->subvol, hl->parent, &parfr, Irp);
if (!NT_SUCCESS(Status)) {
ERR("open_fileref_by_inode returned %08lx\n", Status);
} else if (!parfr->deleted) {
LIST_ENTRY* le2;
bool found = false, deleted = false;
UNICODE_STRING* fn = NULL;
le2 = parfr->children.Flink;
while (le2 != &parfr->children) {
file_ref* fr2 = CONTAINING_RECORD(le2, file_ref, list_entry);
if (fr2->dc->index == hl->index) {
found = true;
deleted = fr2->deleted;
if (!deleted)
fn = &fr2->dc->name;
break;
}
le2 = le2->Flink;
}
if (!found)
fn = &hl->name;
if (!deleted) {
TRACE("fn = %.*S (found = %u)\n", (int)(fn->Length / sizeof(WCHAR)), fn->Buffer, found);
if (flefii)
bytes_needed = (LONG)sector_align(bytes_needed, 8);
bytes_needed += offsetof(FILE_LINK_ENTRY_FULL_ID_INFORMATION, FileName[0]) + fn->Length;
if (bytes_needed > *length)
overflow = true;
if (!overflow) {
if (flefii) {
flefii->NextEntryOffset = (ULONG)sector_align(offsetof(FILE_LINK_ENTRY_FULL_ID_INFORMATION, FileName[0]) + (flefii->FileNameLength * sizeof(WCHAR)), 8);
flefii = (FILE_LINK_ENTRY_FULL_ID_INFORMATION*)((uint8_t*)flefii + flefii->NextEntryOffset);
} else
flefii = &flfii->Entry;
flefii->NextEntryOffset = 0;
RtlCopyMemory(&flefii->ParentFileId.Identifier[0], &parfr->fcb->inode, sizeof(uint64_t));
RtlCopyMemory(&flefii->ParentFileId.Identifier[sizeof(uint64_t)], &parfr->fcb->subvol->id, sizeof(uint64_t));
flefii->FileNameLength = fn->Length / sizeof(WCHAR);
RtlCopyMemory(flefii->FileName, fn->Buffer, fn->Length);
flfii->EntriesReturned++;
len = bytes_needed;
}
}
free_fileref(parfr);
}
le = le->Flink;
}
}
ExReleaseResourceLite(&fcb->Vcb->fileref_lock);
}
flfii->BytesNeeded = bytes_needed;
*length -= len;
Status = overflow ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
ExReleaseResourceLite(fcb->Header.Resource);
return Status;
}
static NTSTATUS fill_in_file_id_information(FILE_ID_INFORMATION* fii, fcb* fcb, LONG* length) {
RtlCopyMemory(&fii->VolumeSerialNumber, &fcb->Vcb->superblock.uuid.uuid[8], sizeof(uint64_t));
RtlCopyMemory(&fii->FileId.Identifier[0], &fcb->inode, sizeof(uint64_t));
RtlCopyMemory(&fii->FileId.Identifier[sizeof(uint64_t)], &fcb->subvol->id, sizeof(uint64_t));
*length -= sizeof(FILE_ID_INFORMATION);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_stat_information(FILE_STAT_INFORMATION* fsi, fcb* fcb, ccb* ccb, LONG* length) {
INODE_ITEM* ii;
fsi->FileId.QuadPart = make_file_id(fcb->subvol, fcb->inode);
if (fcb->ads)
ii = &ccb->fileref->parent->fcb->inode_item;
else
ii = &fcb->inode_item;
if (fcb == fcb->Vcb->dummy_fcb) {
LARGE_INTEGER time;
KeQuerySystemTime(&time);
fsi->CreationTime = fsi->LastAccessTime = fsi->LastWriteTime = fsi->ChangeTime = time;
} else {
fsi->CreationTime.QuadPart = unix_time_to_win(&ii->otime);
fsi->LastAccessTime.QuadPart = unix_time_to_win(&ii->st_atime);
fsi->LastWriteTime.QuadPart = unix_time_to_win(&ii->st_mtime);
fsi->ChangeTime.QuadPart = unix_time_to_win(&ii->st_ctime);
}
if (fcb->ads) {
fsi->AllocationSize.QuadPart = fsi->EndOfFile.QuadPart = fcb->adsdata.Length;
fsi->FileAttributes = ccb->fileref->parent->fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : ccb->fileref->parent->fcb->atts;
} else {
fsi->AllocationSize.QuadPart = fcb_alloc_size(fcb);
fsi->EndOfFile.QuadPart = S_ISDIR(fcb->inode_item.st_mode) ? 0 : fcb->inode_item.st_size;
fsi->FileAttributes = fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fcb->atts;
}
if (fcb->type == BTRFS_TYPE_SOCKET)
fsi->ReparseTag = IO_REPARSE_TAG_AF_UNIX;
else if (fcb->type == BTRFS_TYPE_FIFO)
fsi->ReparseTag = IO_REPARSE_TAG_LX_FIFO;
else if (fcb->type == BTRFS_TYPE_CHARDEV)
fsi->ReparseTag = IO_REPARSE_TAG_LX_CHR;
else if (fcb->type == BTRFS_TYPE_BLOCKDEV)
fsi->ReparseTag = IO_REPARSE_TAG_LX_BLK;
else if (!(fsi->FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT))
fsi->ReparseTag = 0;
else
fsi->ReparseTag = get_reparse_tag_fcb(fcb);
if (fcb->type == BTRFS_TYPE_SOCKET || fcb->type == BTRFS_TYPE_FIFO || fcb->type == BTRFS_TYPE_CHARDEV || fcb->type == BTRFS_TYPE_BLOCKDEV)
fsi->FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
if (fcb->ads)
fsi->NumberOfLinks = ccb->fileref->parent->fcb->inode_item.st_nlink;
else
fsi->NumberOfLinks = fcb->inode_item.st_nlink;
fsi->EffectiveAccess = ccb->access;
*length -= sizeof(FILE_STAT_INFORMATION);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_stat_lx_information(FILE_STAT_LX_INFORMATION* fsli, fcb* fcb, ccb* ccb, LONG* length) {
INODE_ITEM* ii;
fsli->FileId.QuadPart = make_file_id(fcb->subvol, fcb->inode);
if (fcb->ads)
ii = &ccb->fileref->parent->fcb->inode_item;
else
ii = &fcb->inode_item;
if (fcb == fcb->Vcb->dummy_fcb) {
LARGE_INTEGER time;
KeQuerySystemTime(&time);
fsli->CreationTime = fsli->LastAccessTime = fsli->LastWriteTime = fsli->ChangeTime = time;
} else {
fsli->CreationTime.QuadPart = unix_time_to_win(&ii->otime);
fsli->LastAccessTime.QuadPart = unix_time_to_win(&ii->st_atime);
fsli->LastWriteTime.QuadPart = unix_time_to_win(&ii->st_mtime);
fsli->ChangeTime.QuadPart = unix_time_to_win(&ii->st_ctime);
}
if (fcb->ads) {
fsli->AllocationSize.QuadPart = fsli->EndOfFile.QuadPart = fcb->adsdata.Length;
fsli->FileAttributes = ccb->fileref->parent->fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : ccb->fileref->parent->fcb->atts;
} else {
fsli->AllocationSize.QuadPart = fcb_alloc_size(fcb);
fsli->EndOfFile.QuadPart = S_ISDIR(fcb->inode_item.st_mode) ? 0 : fcb->inode_item.st_size;
fsli->FileAttributes = fcb->atts == 0 ? FILE_ATTRIBUTE_NORMAL : fcb->atts;
}
if (fcb->type == BTRFS_TYPE_SOCKET)
fsli->ReparseTag = IO_REPARSE_TAG_AF_UNIX;
else if (fcb->type == BTRFS_TYPE_FIFO)
fsli->ReparseTag = IO_REPARSE_TAG_LX_FIFO;
else if (fcb->type == BTRFS_TYPE_CHARDEV)
fsli->ReparseTag = IO_REPARSE_TAG_LX_CHR;
else if (fcb->type == BTRFS_TYPE_BLOCKDEV)
fsli->ReparseTag = IO_REPARSE_TAG_LX_BLK;
else if (!(fsli->FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT))
fsli->ReparseTag = 0;
else
fsli->ReparseTag = get_reparse_tag_fcb(fcb);
if (fcb->type == BTRFS_TYPE_SOCKET || fcb->type == BTRFS_TYPE_FIFO || fcb->type == BTRFS_TYPE_CHARDEV || fcb->type == BTRFS_TYPE_BLOCKDEV)
fsli->FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
if (fcb->ads)
fsli->NumberOfLinks = ccb->fileref->parent->fcb->inode_item.st_nlink;
else
fsli->NumberOfLinks = fcb->inode_item.st_nlink;
fsli->EffectiveAccess = ccb->access;
fsli->LxFlags = LX_FILE_METADATA_HAS_UID | LX_FILE_METADATA_HAS_GID | LX_FILE_METADATA_HAS_MODE | LX_FILE_METADATA_HAS_DEVICE_ID;
if (fcb->case_sensitive)
fsli->LxFlags |= LX_FILE_CASE_SENSITIVE_DIR;
fsli->LxUid = ii->st_uid;
fsli->LxGid = ii->st_gid;
fsli->LxMode = ii->st_mode;
if (ii->st_mode & __S_IFBLK || ii->st_mode & __S_IFCHR) {
fsli->LxDeviceIdMajor = (ii->st_rdev & 0xFFFFFFFFFFF00000) >> 20;
fsli->LxDeviceIdMinor = (ii->st_rdev & 0xFFFFF);
} else {
fsli->LxDeviceIdMajor = 0;
fsli->LxDeviceIdMinor = 0;
}
*length -= sizeof(FILE_STAT_LX_INFORMATION);
return STATUS_SUCCESS;
}
static NTSTATUS fill_in_file_case_sensitive_information(FILE_CASE_SENSITIVE_INFORMATION* fcsi, fcb* fcb, LONG* length) {
fcsi->Flags = fcb->case_sensitive ? FILE_CS_FLAG_CASE_SENSITIVE_DIR : 0;
*length -= sizeof(FILE_CASE_SENSITIVE_INFORMATION);
return STATUS_SUCCESS;
}
#endif // __REACTOS__
static NTSTATUS fill_in_file_compression_information(FILE_COMPRESSION_INFORMATION* fci, LONG* length, fcb* fcb) {
*length -= sizeof(FILE_COMPRESSION_INFORMATION);
memset(fci, 0, sizeof(FILE_COMPRESSION_INFORMATION));
if (fcb->ads)
fci->CompressedFileSize.QuadPart = fcb->adsdata.Length;
else if (!S_ISDIR(fcb->inode_item.st_mode))
fci->CompressedFileSize.QuadPart = fcb->inode_item.st_size;
return STATUS_SUCCESS;
}
static NTSTATUS query_info(device_extension* Vcb, PFILE_OBJECT FileObject, PIRP Irp) {
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
LONG length = IrpSp->Parameters.QueryFile.Length;
fcb* fcb = FileObject->FsContext;
ccb* ccb = FileObject->FsContext2;
file_ref* fileref = ccb ? ccb->fileref : NULL;
NTSTATUS Status;
TRACE("(%p, %p, %p)\n", Vcb, FileObject, Irp);
TRACE("fcb = %p\n", fcb);
if (fcb == Vcb->volume_fcb)
return STATUS_INVALID_PARAMETER;
if (!ccb) {
ERR("ccb is NULL\n");
return STATUS_INVALID_PARAMETER;
}
switch (IrpSp->Parameters.QueryFile.FileInformationClass) {
case FileAllInformation:
{
FILE_ALL_INFORMATION* fai = Irp->AssociatedIrp.SystemBuffer;
INODE_ITEM* ii;
TRACE("FileAllInformation\n");
if (Irp->RequestorMode != KernelMode && !(ccb->access & (FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto exit;
}
if (fcb->ads) {
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
Status = STATUS_INTERNAL_ERROR;
goto exit;
}
ii = &fileref->parent->fcb->inode_item;
} else
ii = &fcb->inode_item;
// Access, mode, and alignment are all filled in by the kernel
if (length > 0)
fill_in_file_basic_information(&fai->BasicInformation, ii, &length, fcb, fileref);
if (length > 0)
fill_in_file_standard_information(&fai->StandardInformation, fcb, fileref, &length);
if (length > 0)
fill_in_file_internal_information(&fai->InternalInformation, fcb, &length);
if (length > 0)
fill_in_file_ea_information(&fai->EaInformation, fcb, &length);
length -= sizeof(FILE_ACCESS_INFORMATION);
if (length > 0)
fill_in_file_position_information(&fai->PositionInformation, FileObject, &length);
length -= sizeof(FILE_MODE_INFORMATION);
length -= sizeof(FILE_ALIGNMENT_INFORMATION);
if (length > 0)
fill_in_file_name_information(&fai->NameInformation, fcb, fileref, &length);
Status = STATUS_SUCCESS;
break;
}
case FileAttributeTagInformation:
{
FILE_ATTRIBUTE_TAG_INFORMATION* ati = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileAttributeTagInformation\n");
if (Irp->RequestorMode != KernelMode && !(ccb->access & (FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto exit;
}
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
Status = fill_in_file_attribute_information(ati, fcb, ccb, &length);
ExReleaseResourceLite(&Vcb->tree_lock);
break;
}
case FileBasicInformation:
{
FILE_BASIC_INFORMATION* fbi = Irp->AssociatedIrp.SystemBuffer;
INODE_ITEM* ii;
TRACE("FileBasicInformation\n");
if (Irp->RequestorMode != KernelMode && !(ccb->access & (FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto exit;
}
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_BASIC_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
if (fcb->ads) {
if (!fileref || !fileref->parent) {
ERR("no fileref for stream\n");
Status = STATUS_INTERNAL_ERROR;
goto exit;
}
ii = &fileref->parent->fcb->inode_item;
} else
ii = &fcb->inode_item;
Status = fill_in_file_basic_information(fbi, ii, &length, fcb, fileref);
break;
}
case FileCompressionInformation:
{
FILE_COMPRESSION_INFORMATION* fci = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileCompressionInformation\n");
Status = fill_in_file_compression_information(fci, &length, fcb);
break;
}
case FileEaInformation:
{
FILE_EA_INFORMATION* eai = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileEaInformation\n");
Status = fill_in_file_ea_information(eai, fcb, &length);
break;
}
case FileInternalInformation:
{
FILE_INTERNAL_INFORMATION* fii = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileInternalInformation\n");
Status = fill_in_file_internal_information(fii, fcb, &length);
break;
}
case FileNameInformation:
{
FILE_NAME_INFORMATION* fni = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileNameInformation\n");
Status = fill_in_file_name_information(fni, fcb, fileref, &length);
break;
}
case FileNetworkOpenInformation:
{
FILE_NETWORK_OPEN_INFORMATION* fnoi = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileNetworkOpenInformation\n");
if (Irp->RequestorMode != KernelMode && !(ccb->access & (FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto exit;
}
Status = fill_in_file_network_open_information(fnoi, fcb, fileref, &length);
break;
}
case FilePositionInformation:
{
FILE_POSITION_INFORMATION* fpi = Irp->AssociatedIrp.SystemBuffer;
TRACE("FilePositionInformation\n");
Status = fill_in_file_position_information(fpi, FileObject, &length);
break;
}
case FileStandardInformation:
{
FILE_STANDARD_INFORMATION* fsi = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileStandardInformation\n");
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_STANDARD_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
Status = fill_in_file_standard_information(fsi, fcb, ccb->fileref, &length);
break;
}
case FileStreamInformation:
{
FILE_STREAM_INFORMATION* fsi = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileStreamInformation\n");
Status = fill_in_file_stream_information(fsi, fileref, &length);
break;
}
#if (NTDDI_VERSION >= NTDDI_VISTA)
case FileHardLinkInformation:
{
FILE_LINKS_INFORMATION* fli = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileHardLinkInformation\n");
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
Status = fill_in_hard_link_information(fli, fileref, Irp, &length);
ExReleaseResourceLite(&Vcb->tree_lock);
break;
}
case FileNormalizedNameInformation:
{
FILE_NAME_INFORMATION* fni = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileNormalizedNameInformation\n");
Status = fill_in_file_name_information(fni, fcb, fileref, &length);
break;
}
case FileStandardLinkInformation:
{
FILE_STANDARD_LINK_INFORMATION* fsli = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileStandardLinkInformation\n");
Status = fill_in_file_standard_link_information(fsli, fcb, ccb->fileref, &length);
break;
}
case FileRemoteProtocolInformation:
TRACE("FileRemoteProtocolInformation\n");
Status = STATUS_INVALID_PARAMETER;
goto exit;
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch"
#endif
case FileIdInformation:
{
FILE_ID_INFORMATION* fii = Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_ID_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
TRACE("FileIdInformation\n");
Status = fill_in_file_id_information(fii, fcb, &length);
break;
}
case FileStatInformation:
{
FILE_STAT_INFORMATION* fsi = Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_STAT_LX_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
TRACE("FileStatInformation\n");
Status = fill_in_file_stat_information(fsi, fcb, ccb, &length);
break;
}
case FileStatLxInformation:
{
FILE_STAT_LX_INFORMATION* fsli = Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_STAT_LX_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
TRACE("FileStatLxInformation\n");
Status = fill_in_file_stat_lx_information(fsli, fcb, ccb, &length);
break;
}
case FileCaseSensitiveInformation:
{
FILE_CASE_SENSITIVE_INFORMATION* fcsi = Irp->AssociatedIrp.SystemBuffer;
if (IrpSp->Parameters.QueryFile.Length < sizeof(FILE_CASE_SENSITIVE_INFORMATION)) {
WARN("overflow\n");
Status = STATUS_BUFFER_OVERFLOW;
goto exit;
}
TRACE("FileCaseSensitiveInformation\n");
Status = fill_in_file_case_sensitive_information(fcsi, fcb, &length);
break;
}
case FileHardLinkFullIdInformation:
{
FILE_LINKS_FULL_ID_INFORMATION* flfii = Irp->AssociatedIrp.SystemBuffer;
TRACE("FileHardLinkFullIdInformation\n");
ExAcquireResourceSharedLite(&Vcb->tree_lock, true);
Status = fill_in_hard_link_full_id_information(flfii, fileref, Irp, &length);
ExReleaseResourceLite(&Vcb->tree_lock);
break;
}
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif
#endif
default:
WARN("unknown FileInformationClass %u\n", IrpSp->Parameters.QueryFile.FileInformationClass);
Status = STATUS_INVALID_PARAMETER;
goto exit;
}
if (length < 0) {
length = 0;
Status = STATUS_BUFFER_OVERFLOW;
}
Irp->IoStatus.Information = IrpSp->Parameters.QueryFile.Length - length;
exit:
TRACE("query_info returning %08lx\n", Status);
return Status;
}
_Dispatch_type_(IRP_MJ_QUERY_INFORMATION)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS __stdcall drv_query_information(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
PIO_STACK_LOCATION IrpSp;
NTSTATUS Status;
fcb* fcb;
device_extension* Vcb = DeviceObject->DeviceExtension;
bool top_level;
FsRtlEnterFileSystem();
top_level = is_top_level(Irp);
if (Vcb && Vcb->type == VCB_TYPE_VOLUME) {
Status = vol_query_information(DeviceObject, Irp);
goto end;
} else if (!Vcb || Vcb->type != VCB_TYPE_FS) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
Irp->IoStatus.Information = 0;
TRACE("query information\n");
IrpSp = IoGetCurrentIrpStackLocation(Irp);
fcb = IrpSp->FileObject->FsContext;
TRACE("fcb = %p\n", fcb);
TRACE("fcb->subvol = %p\n", fcb->subvol);
Status = query_info(fcb->Vcb, IrpSp->FileObject, Irp);
end:
TRACE("returning %08lx\n", Status);
Irp->IoStatus.Status = Status;
IoCompleteRequest( Irp, IO_NO_INCREMENT );
if (top_level)
IoSetTopLevelIrp(NULL);
FsRtlExitFileSystem();
return Status;
}
_Dispatch_type_(IRP_MJ_QUERY_EA)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS __stdcall drv_query_ea(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
NTSTATUS Status;
bool top_level;
device_extension* Vcb = DeviceObject->DeviceExtension;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
fcb* fcb;
ccb* ccb;
FILE_FULL_EA_INFORMATION* ffei;
ULONG retlen = 0;
FsRtlEnterFileSystem();
TRACE("(%p, %p)\n", DeviceObject, Irp);
top_level = is_top_level(Irp);
if (Vcb && Vcb->type == VCB_TYPE_VOLUME) {
Status = vol_query_ea(DeviceObject, Irp);
goto end;
} else if (!Vcb || Vcb->type != VCB_TYPE_FS) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
ffei = map_user_buffer(Irp, NormalPagePriority);
if (!ffei) {
ERR("could not get output buffer\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (!FileObject) {
ERR("no file object\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
fcb = FileObject->FsContext;
if (!fcb) {
ERR("no fcb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
ccb = FileObject->FsContext2;
if (!ccb) {
ERR("no ccb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (Irp->RequestorMode == UserMode && !(ccb->access & (FILE_READ_EA | FILE_WRITE_EA))) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (fcb->ads)
fcb = ccb->fileref->parent->fcb;
ExAcquireResourceSharedLite(fcb->Header.Resource, true);
Status = STATUS_SUCCESS;
if (fcb->ea_xattr.Length == 0)
goto end2;
if (IrpSp->Parameters.QueryEa.EaList) {
FILE_FULL_EA_INFORMATION *ea, *out;
FILE_GET_EA_INFORMATION* in;
in = IrpSp->Parameters.QueryEa.EaList;
do {
STRING s;
s.Length = s.MaximumLength = in->EaNameLength;
s.Buffer = in->EaName;
RtlUpperString(&s, &s);
if (in->NextEntryOffset == 0)
break;
in = (FILE_GET_EA_INFORMATION*)(((uint8_t*)in) + in->NextEntryOffset);
} while (true);
ea = (FILE_FULL_EA_INFORMATION*)fcb->ea_xattr.Buffer;
out = NULL;
do {
bool found = false;
in = IrpSp->Parameters.QueryEa.EaList;
do {
if (in->EaNameLength == ea->EaNameLength &&
RtlCompareMemory(in->EaName, ea->EaName, in->EaNameLength) == in->EaNameLength) {
found = true;
break;
}
if (in->NextEntryOffset == 0)
break;
in = (FILE_GET_EA_INFORMATION*)(((uint8_t*)in) + in->NextEntryOffset);
} while (true);
if (found) {
uint8_t padding = retlen % 4 > 0 ? (4 - (retlen % 4)) : 0;
if (offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + ea->EaNameLength + 1 + ea->EaValueLength > IrpSp->Parameters.QueryEa.Length - retlen - padding) {
Status = STATUS_BUFFER_OVERFLOW;
retlen = 0;
goto end2;
}
retlen += padding;
if (out) {
out->NextEntryOffset = (ULONG)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + out->EaNameLength + 1 + out->EaValueLength + padding;
out = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)out) + out->NextEntryOffset);
} else
out = ffei;
out->NextEntryOffset = 0;
out->Flags = ea->Flags;
out->EaNameLength = ea->EaNameLength;
out->EaValueLength = ea->EaValueLength;
RtlCopyMemory(out->EaName, ea->EaName, ea->EaNameLength + ea->EaValueLength + 1);
retlen += (ULONG)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + ea->EaNameLength + 1 + ea->EaValueLength;
if (IrpSp->Flags & SL_RETURN_SINGLE_ENTRY)
break;
}
if (ea->NextEntryOffset == 0)
break;
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
} while (true);
} else {
FILE_FULL_EA_INFORMATION *ea, *out;
ULONG index;
if (IrpSp->Flags & SL_INDEX_SPECIFIED) {
// The index is 1-based
if (IrpSp->Parameters.QueryEa.EaIndex == 0) {
Status = STATUS_NONEXISTENT_EA_ENTRY;
goto end2;
} else
index = IrpSp->Parameters.QueryEa.EaIndex - 1;
} else if (IrpSp->Flags & SL_RESTART_SCAN)
index = ccb->ea_index = 0;
else
index = ccb->ea_index;
ea = (FILE_FULL_EA_INFORMATION*)fcb->ea_xattr.Buffer;
if (index > 0) {
ULONG i;
for (i = 0; i < index; i++) {
if (ea->NextEntryOffset == 0) // last item
goto end2;
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
}
}
out = NULL;
do {
uint8_t padding = retlen % 4 > 0 ? (4 - (retlen % 4)) : 0;
if (offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + ea->EaNameLength + 1 + ea->EaValueLength > IrpSp->Parameters.QueryEa.Length - retlen - padding) {
Status = retlen == 0 ? STATUS_BUFFER_TOO_SMALL : STATUS_BUFFER_OVERFLOW;
goto end2;
}
retlen += padding;
if (out) {
out->NextEntryOffset = (ULONG)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + out->EaNameLength + 1 + out->EaValueLength + padding;
out = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)out) + out->NextEntryOffset);
} else
out = ffei;
out->NextEntryOffset = 0;
out->Flags = ea->Flags;
out->EaNameLength = ea->EaNameLength;
out->EaValueLength = ea->EaValueLength;
RtlCopyMemory(out->EaName, ea->EaName, ea->EaNameLength + ea->EaValueLength + 1);
retlen += (ULONG)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + ea->EaNameLength + 1 + ea->EaValueLength;
if (!(IrpSp->Flags & SL_INDEX_SPECIFIED))
ccb->ea_index++;
if (ea->NextEntryOffset == 0 || IrpSp->Flags & SL_RETURN_SINGLE_ENTRY)
break;
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
} while (true);
}
end2:
ExReleaseResourceLite(fcb->Header.Resource);
end:
TRACE("returning %08lx\n", Status);
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = NT_SUCCESS(Status) || Status == STATUS_BUFFER_OVERFLOW ? retlen : 0;
IoCompleteRequest( Irp, IO_NO_INCREMENT );
if (top_level)
IoSetTopLevelIrp(NULL);
FsRtlExitFileSystem();
return Status;
}
_Dispatch_type_(IRP_MJ_SET_EA)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS __stdcall drv_set_ea(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
device_extension* Vcb = DeviceObject->DeviceExtension;
NTSTATUS Status;
bool top_level;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
fcb* fcb;
ccb* ccb;
file_ref* fileref;
FILE_FULL_EA_INFORMATION* ffei;
ULONG offset;
LIST_ENTRY ealist;
ea_item* item;
FILE_FULL_EA_INFORMATION* ea;
LIST_ENTRY* le;
LARGE_INTEGER time;
BTRFS_TIME now;
FsRtlEnterFileSystem();
TRACE("(%p, %p)\n", DeviceObject, Irp);
top_level = is_top_level(Irp);
if (Vcb && Vcb->type == VCB_TYPE_VOLUME) {
Status = vol_set_ea(DeviceObject, Irp);
goto end;
} else if (!Vcb || Vcb->type != VCB_TYPE_FS) {
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (Vcb->readonly) {
Status = STATUS_MEDIA_WRITE_PROTECTED;
goto end;
}
ffei = map_user_buffer(Irp, NormalPagePriority);
if (!ffei) {
ERR("could not get output buffer\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
Status = IoCheckEaBufferValidity(ffei, IrpSp->Parameters.SetEa.Length, &offset);
if (!NT_SUCCESS(Status)) {
ERR("IoCheckEaBufferValidity returned %08lx (error at offset %lu)\n", Status, offset);
goto end;
}
if (!FileObject) {
ERR("no file object\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
fcb = FileObject->FsContext;
if (!fcb) {
ERR("no fcb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
ccb = FileObject->FsContext2;
if (!ccb) {
ERR("no ccb\n");
Status = STATUS_INVALID_PARAMETER;
goto end;
}
if (Irp->RequestorMode == UserMode && !(ccb->access & FILE_WRITE_EA)) {
WARN("insufficient privileges\n");
Status = STATUS_ACCESS_DENIED;
goto end;
}
if (fcb->ads) {
fileref = ccb->fileref->parent;
fcb = fileref->fcb;
} else
fileref = ccb->fileref;
InitializeListHead(&ealist);
ExAcquireResourceExclusiveLite(fcb->Header.Resource, true);
if (fcb->ea_xattr.Length > 0) {
ea = (FILE_FULL_EA_INFORMATION*)fcb->ea_xattr.Buffer;
do {
item = ExAllocatePoolWithTag(PagedPool, sizeof(ea_item), ALLOC_TAG);
if (!item) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end2;
}
item->name.Length = item->name.MaximumLength = ea->EaNameLength;
item->name.Buffer = ea->EaName;
item->value.Length = item->value.MaximumLength = ea->EaValueLength;
item->value.Buffer = &ea->EaName[ea->EaNameLength + 1];
item->flags = ea->Flags;
InsertTailList(&ealist, &item->list_entry);
if (ea->NextEntryOffset == 0)
break;
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
} while (true);
}
ea = ffei;
do {
STRING s;
bool found = false;
s.Length = s.MaximumLength = ea->EaNameLength;
s.Buffer = ea->EaName;
RtlUpperString(&s, &s);
le = ealist.Flink;
while (le != &ealist) {
item = CONTAINING_RECORD(le, ea_item, list_entry);
if (item->name.Length == s.Length &&
RtlCompareMemory(item->name.Buffer, s.Buffer, s.Length) == s.Length) {
item->flags = ea->Flags;
item->value.Length = item->value.MaximumLength = ea->EaValueLength;
item->value.Buffer = &ea->EaName[ea->EaNameLength + 1];
found = true;
break;
}
le = le->Flink;
}
if (!found) {
item = ExAllocatePoolWithTag(PagedPool, sizeof(ea_item), ALLOC_TAG);
if (!item) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end2;
}
item->name.Length = item->name.MaximumLength = ea->EaNameLength;
item->name.Buffer = ea->EaName;
item->value.Length = item->value.MaximumLength = ea->EaValueLength;
item->value.Buffer = &ea->EaName[ea->EaNameLength + 1];
item->flags = ea->Flags;
InsertTailList(&ealist, &item->list_entry);
}
if (ea->NextEntryOffset == 0)
break;
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
} while (true);
// remove entries with zero-length value
le = ealist.Flink;
while (le != &ealist) {
LIST_ENTRY* le2 = le->Flink;
item = CONTAINING_RECORD(le, ea_item, list_entry);
if (item->value.Length == 0) {
RemoveEntryList(&item->list_entry);
ExFreePool(item);
}
le = le2;
}
// handle LXSS values
le = ealist.Flink;
while (le != &ealist) {
LIST_ENTRY* le2 = le->Flink;
item = CONTAINING_RECORD(le, ea_item, list_entry);
if (item->name.Length == sizeof(lxuid) - 1 && RtlCompareMemory(item->name.Buffer, lxuid, item->name.Length) == item->name.Length) {
if (item->value.Length < sizeof(uint32_t)) {
ERR("uid value was shorter than expected\n");
Status = STATUS_INVALID_PARAMETER;
goto end2;
}
if (Irp->RequestorMode == KernelMode) {
RtlCopyMemory(&fcb->inode_item.st_uid, item->value.Buffer, sizeof(uint32_t));
fcb->sd_dirty = true;
fcb->sd_deleted = false;
}
RemoveEntryList(&item->list_entry);
ExFreePool(item);
} else if (item->name.Length == sizeof(lxgid) - 1 && RtlCompareMemory(item->name.Buffer, lxgid, item->name.Length) == item->name.Length) {
if (item->value.Length < sizeof(uint32_t)) {
ERR("gid value was shorter than expected\n");
Status = STATUS_INVALID_PARAMETER;
goto end2;
}
if (Irp->RequestorMode == KernelMode)
RtlCopyMemory(&fcb->inode_item.st_gid, item->value.Buffer, sizeof(uint32_t));
RemoveEntryList(&item->list_entry);
ExFreePool(item);
} else if (item->name.Length == sizeof(lxmod) - 1 && RtlCompareMemory(item->name.Buffer, lxmod, item->name.Length) == item->name.Length) {
if (item->value.Length < sizeof(uint32_t)) {
ERR("mode value was shorter than expected\n");
Status = STATUS_INVALID_PARAMETER;
goto end2;
}
if (Irp->RequestorMode == KernelMode) {
uint32_t allowed = S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IWOTH | S_IXOTH | S_ISGID | S_ISVTX | S_ISUID;
uint32_t val;
RtlCopyMemory(&val, item->value.Buffer, sizeof(uint32_t));
fcb->inode_item.st_mode &= ~allowed;
fcb->inode_item.st_mode |= val & allowed;
}
RemoveEntryList(&item->list_entry);
ExFreePool(item);
}
le = le2;
}
if (IsListEmpty(&ealist)) {
fcb->ealen = 0;
if (fcb->ea_xattr.Buffer)
ExFreePool(fcb->ea_xattr.Buffer);
fcb->ea_xattr.Length = fcb->ea_xattr.MaximumLength = 0;
fcb->ea_xattr.Buffer = NULL;
} else {
uint16_t size = 0;
char *buf, *oldbuf;
le = ealist.Flink;
while (le != &ealist) {
item = CONTAINING_RECORD(le, ea_item, list_entry);
if (size % 4 > 0)
size += 4 - (size % 4);
size += (uint16_t)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + item->name.Length + 1 + item->value.Length;
le = le->Flink;
}
buf = ExAllocatePoolWithTag(PagedPool, size, ALLOC_TAG);
if (!buf) {
ERR("out of memory\n");
Status = STATUS_INSUFFICIENT_RESOURCES;
goto end2;
}
oldbuf = fcb->ea_xattr.Buffer;
fcb->ea_xattr.Length = fcb->ea_xattr.MaximumLength = size;
fcb->ea_xattr.Buffer = buf;
fcb->ealen = 4;
ea = NULL;
le = ealist.Flink;
while (le != &ealist) {
item = CONTAINING_RECORD(le, ea_item, list_entry);
if (ea) {
ea->NextEntryOffset = (ULONG)offsetof(FILE_FULL_EA_INFORMATION, EaName[0]) + ea->EaNameLength + ea->EaValueLength;
if (ea->NextEntryOffset % 4 > 0)
ea->NextEntryOffset += 4 - (ea->NextEntryOffset % 4);
ea = (FILE_FULL_EA_INFORMATION*)(((uint8_t*)ea) + ea->NextEntryOffset);
} else
ea = (FILE_FULL_EA_INFORMATION*)fcb->ea_xattr.Buffer;
ea->NextEntryOffset = 0;
ea->Flags = item->flags;
ea->EaNameLength = (UCHAR)item->name.Length;
ea->EaValueLength = item->value.Length;
RtlCopyMemory(ea->EaName, item->name.Buffer, item->name.Length);
ea->EaName[item->name.Length] = 0;
RtlCopyMemory(&ea->EaName[item->name.Length + 1], item->value.Buffer, item->value.Length);
fcb->ealen += 5 + item->name.Length + item->value.Length;
le = le->Flink;
}
if (oldbuf)
ExFreePool(oldbuf);
}
fcb->ea_changed = true;
KeQuerySystemTime(&time);
win_time_to_unix(time, &now);
fcb->inode_item.transid = Vcb->superblock.generation;
fcb->inode_item.sequence++;
if (!ccb->user_set_change_time)
fcb->inode_item.st_ctime = now;
fcb->inode_item_changed = true;
mark_fcb_dirty(fcb);
send_notification_fileref(fileref, FILE_NOTIFY_CHANGE_EA, FILE_ACTION_MODIFIED, NULL);
Status = STATUS_SUCCESS;
end2:
ExReleaseResourceLite(fcb->Header.Resource);
while (!IsListEmpty(&ealist)) {
le = RemoveHeadList(&ealist);
item = CONTAINING_RECORD(le, ea_item, list_entry);
ExFreePool(item);
}
end:
TRACE("returning %08lx\n", Status);
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
if (top_level)
IoSetTopLevelIrp(NULL);
FsRtlExitFileSystem();
return Status;
}
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