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![Pierre Schweitzer](/assets/img/avatar_default.png)
Sync btrfs to 0.5. This breaks BTRFS in ReactOS. CORE-11674 svn path=/trunk/; revision=72023
1183 lines
41 KiB
C
1183 lines
41 KiB
C
/* Copyright (c) Mark Harmstone 2016
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*
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* This file is part of WinBtrfs.
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*
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* WinBtrfs is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public Licence as published by
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* the Free Software Foundation, either version 3 of the Licence, or
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* (at your option) any later version.
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*
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* WinBtrfs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public Licence for more details.
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*
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* You should have received a copy of the GNU Lesser General Public Licence
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* along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
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#include "btrfs_drv.h"
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enum DirEntryType {
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DirEntryType_File,
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DirEntryType_Self,
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DirEntryType_Parent
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};
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typedef struct {
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KEY key;
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BOOL name_alloc;
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char* name;
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ULONG namelen;
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UINT8 type;
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enum DirEntryType dir_entry_type;
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} dir_entry;
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static ULONG STDCALL get_reparse_tag(device_extension* Vcb, root* subvol, UINT64 inode, UINT8 type, ULONG atts) {
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fcb* fcb;
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ULONG tag = 0, br;
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NTSTATUS Status;
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// FIXME - will this slow things down?
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if (type == BTRFS_TYPE_SYMLINK)
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return IO_REPARSE_TAG_SYMLINK;
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if (type != BTRFS_TYPE_FILE && type != BTRFS_TYPE_DIRECTORY)
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return 0;
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if (!(atts & FILE_ATTRIBUTE_REPARSE_POINT))
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return 0;
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ExAcquireResourceExclusiveLite(&Vcb->fcb_lock, TRUE);
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Status = open_fcb(Vcb, subvol, inode, type, NULL, NULL, &fcb);
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if (!NT_SUCCESS(Status)) {
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ERR("open_fcb returned %08x\n", Status);
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ExReleaseResourceLite(&Vcb->fcb_lock);
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return 0;
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}
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ExReleaseResourceLite(&Vcb->fcb_lock);
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ExAcquireResourceSharedLite(fcb->Header.Resource, TRUE);
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if (type == BTRFS_TYPE_DIRECTORY) {
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if (!fcb->reparse_xattr.Buffer || fcb->reparse_xattr.Length < sizeof(ULONG))
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goto end;
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RtlCopyMemory(&tag, fcb->reparse_xattr.Buffer, sizeof(ULONG));
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} else {
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Status = read_file(fcb, (UINT8*)&tag, 0, sizeof(ULONG), &br, NULL);
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if (!NT_SUCCESS(Status)) {
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ERR("read_file returned %08x\n", Status);
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goto end;
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}
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if (br < sizeof(ULONG))
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goto end;
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}
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end:
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ExReleaseResourceLite(fcb->Header.Resource);
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free_fcb(fcb);
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return tag;
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}
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static NTSTATUS STDCALL query_dir_item(fcb* fcb, file_ref* fileref, void* buf, LONG* len, PIRP Irp, dir_entry* de, root* r) {
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PIO_STACK_LOCATION IrpSp;
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UINT32 needed;
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UINT64 inode;
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INODE_ITEM ii;
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NTSTATUS Status;
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ULONG stringlen;
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ULONG atts;
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IrpSp = IoGetCurrentIrpStackLocation(Irp);
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if (de->key.obj_type == TYPE_ROOT_ITEM) { // subvol
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LIST_ENTRY* le;
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r = NULL;
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le = fcb->Vcb->roots.Flink;
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while (le != &fcb->Vcb->roots) {
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root* subvol = CONTAINING_RECORD(le, root, list_entry);
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if (subvol->id == de->key.obj_id) {
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r = subvol;
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break;
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}
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le = le->Flink;
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}
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if (!r) {
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ERR("could not find root %llx\n", de->key.obj_id);
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return STATUS_OBJECT_NAME_NOT_FOUND;
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}
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inode = SUBVOL_ROOT_INODE;
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} else {
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inode = de->key.obj_id;
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}
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if (IrpSp->Parameters.QueryDirectory.FileInformationClass != FileNamesInformation) { // FIXME - object ID and reparse point classes too?
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switch (de->dir_entry_type) {
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case DirEntryType_File:
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{
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LIST_ENTRY* le;
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BOOL found = FALSE;
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ExAcquireResourceSharedLite(&fcb->Vcb->fcb_lock, TRUE);
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if (!IsListEmpty(&r->fcbs)) {
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le = r->fcbs.Flink;
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while (le != &r->fcbs) {
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struct _fcb* fcb2 = CONTAINING_RECORD(le, struct _fcb, list_entry);
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if (fcb2->inode == inode && !fcb2->ads) {
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ii = fcb2->inode_item;
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atts = fcb2->atts;
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found = TRUE;
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break;
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}
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le = le->Flink;
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}
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}
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ExReleaseResourceLite(&fcb->Vcb->fcb_lock);
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if (!found) {
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KEY searchkey;
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traverse_ptr tp;
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searchkey.obj_id = inode;
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searchkey.obj_type = TYPE_INODE_ITEM;
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searchkey.offset = 0xffffffffffffffff;
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Status = find_item(fcb->Vcb, r, &tp, &searchkey, FALSE);
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if (!NT_SUCCESS(Status)) {
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ERR("error - find_item returned %08x\n", Status);
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return Status;
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}
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if (tp.item->key.obj_id != searchkey.obj_id || tp.item->key.obj_type != searchkey.obj_type) {
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ERR("could not find inode item for inode %llx in root %llx\n", inode, r->id);
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return STATUS_INTERNAL_ERROR;
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}
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RtlZeroMemory(&ii, sizeof(INODE_ITEM));
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if (tp.item->size > 0)
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RtlCopyMemory(&ii, tp.item->data, min(sizeof(INODE_ITEM), tp.item->size));
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if (IrpSp->Parameters.QueryDirectory.FileInformationClass == FileBothDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileFullDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileIdBothDirectoryInformation) {
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BOOL dotfile = de->namelen > 1 && de->name[0] == '.';
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atts = get_file_attributes(fcb->Vcb, &ii, r, inode, de->type, dotfile, FALSE);
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}
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}
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break;
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}
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case DirEntryType_Self:
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ii = fcb->inode_item;
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r = fcb->subvol;
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inode = fcb->inode;
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atts = fcb->atts;
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break;
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case DirEntryType_Parent:
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if (fileref && fileref->parent) {
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ii = fileref->parent->fcb->inode_item;
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r = fileref->parent->fcb->subvol;
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inode = fileref->parent->fcb->inode;
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atts = fileref->parent->fcb->atts;
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} else {
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ERR("no fileref\n");
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return STATUS_INTERNAL_ERROR;
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}
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break;
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}
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}
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// FICs which return the filename
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if (IrpSp->Parameters.QueryDirectory.FileInformationClass == FileBothDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileFullDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileIdBothDirectoryInformation ||
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IrpSp->Parameters.QueryDirectory.FileInformationClass == FileNamesInformation) {
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Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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}
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switch (IrpSp->Parameters.QueryDirectory.FileInformationClass) {
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case FileBothDirectoryInformation:
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{
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FILE_BOTH_DIR_INFORMATION* fbdi = buf;
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TRACE("FileBothDirectoryInformation\n");
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needed = sizeof(FILE_BOTH_DIR_INFORMATION) - sizeof(WCHAR) + stringlen;
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if (needed > *len) {
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TRACE("buffer overflow - %u > %u\n", needed, *len);
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return STATUS_BUFFER_OVERFLOW;
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}
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fbdi->NextEntryOffset = 0;
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fbdi->FileIndex = 0;
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fbdi->CreationTime.QuadPart = unix_time_to_win(&ii.otime);
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fbdi->LastAccessTime.QuadPart = unix_time_to_win(&ii.st_atime);
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fbdi->LastWriteTime.QuadPart = unix_time_to_win(&ii.st_mtime);
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fbdi->ChangeTime.QuadPart = 0;
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fbdi->EndOfFile.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_size;
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fbdi->AllocationSize.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_blocks;
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fbdi->FileAttributes = atts;
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fbdi->FileNameLength = stringlen;
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fbdi->EaSize = get_reparse_tag(fcb->Vcb, r, inode, de->type, atts);
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fbdi->ShortNameLength = 0;
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// fibdi->ShortName[12];
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Status = RtlUTF8ToUnicodeN(fbdi->FileName, stringlen, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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*len -= needed;
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return STATUS_SUCCESS;
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}
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case FileDirectoryInformation:
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{
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FILE_DIRECTORY_INFORMATION* fdi = buf;
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TRACE("FileDirectoryInformation\n");
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needed = sizeof(FILE_DIRECTORY_INFORMATION) - sizeof(WCHAR) + stringlen;
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if (needed > *len) {
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TRACE("buffer overflow - %u > %u\n", needed, *len);
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return STATUS_BUFFER_OVERFLOW;
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}
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fdi->NextEntryOffset = 0;
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fdi->FileIndex = 0;
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fdi->CreationTime.QuadPart = unix_time_to_win(&ii.otime);
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fdi->LastAccessTime.QuadPart = unix_time_to_win(&ii.st_atime);
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fdi->LastWriteTime.QuadPart = unix_time_to_win(&ii.st_mtime);
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fdi->ChangeTime.QuadPart = 0;
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fdi->EndOfFile.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_size;
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fdi->AllocationSize.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_blocks;
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fdi->FileAttributes = atts;
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fdi->FileNameLength = stringlen;
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Status = RtlUTF8ToUnicodeN(fdi->FileName, stringlen, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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*len -= needed;
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return STATUS_SUCCESS;
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}
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case FileFullDirectoryInformation:
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{
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FILE_FULL_DIR_INFORMATION* ffdi = buf;
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TRACE("FileFullDirectoryInformation\n");
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needed = sizeof(FILE_FULL_DIR_INFORMATION) - sizeof(WCHAR) + stringlen;
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if (needed > *len) {
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TRACE("buffer overflow - %u > %u\n", needed, *len);
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return STATUS_BUFFER_OVERFLOW;
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}
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ffdi->NextEntryOffset = 0;
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ffdi->FileIndex = 0;
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ffdi->CreationTime.QuadPart = unix_time_to_win(&ii.otime);
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ffdi->LastAccessTime.QuadPart = unix_time_to_win(&ii.st_atime);
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ffdi->LastWriteTime.QuadPart = unix_time_to_win(&ii.st_mtime);
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ffdi->ChangeTime.QuadPart = 0;
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ffdi->EndOfFile.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_size;
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ffdi->AllocationSize.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_blocks;
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ffdi->FileAttributes = atts;
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ffdi->FileNameLength = stringlen;
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ffdi->EaSize = get_reparse_tag(fcb->Vcb, r, inode, de->type, atts);
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Status = RtlUTF8ToUnicodeN(ffdi->FileName, stringlen, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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*len -= needed;
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return STATUS_SUCCESS;
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}
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case FileIdBothDirectoryInformation:
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{
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FILE_ID_BOTH_DIR_INFORMATION* fibdi = buf;
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TRACE("FileIdBothDirectoryInformation\n");
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needed = sizeof(FILE_ID_BOTH_DIR_INFORMATION) - sizeof(WCHAR) + stringlen;
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if (needed > *len) {
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TRACE("buffer overflow - %u > %u\n", needed, *len);
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return STATUS_BUFFER_OVERFLOW;
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}
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// if (!buf)
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// return STATUS_INVALID_POINTER;
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fibdi->NextEntryOffset = 0;
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fibdi->FileIndex = 0;
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fibdi->CreationTime.QuadPart = unix_time_to_win(&ii.otime);
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fibdi->LastAccessTime.QuadPart = unix_time_to_win(&ii.st_atime);
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fibdi->LastWriteTime.QuadPart = unix_time_to_win(&ii.st_mtime);
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fibdi->ChangeTime.QuadPart = 0;
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fibdi->EndOfFile.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_size;
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fibdi->AllocationSize.QuadPart = de->type == BTRFS_TYPE_SYMLINK ? 0 : ii.st_blocks;
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fibdi->FileAttributes = atts;
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fibdi->FileNameLength = stringlen;
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fibdi->EaSize = get_reparse_tag(fcb->Vcb, r, inode, de->type, atts);
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fibdi->ShortNameLength = 0;
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// fibdi->ShortName[12];
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fibdi->FileId.QuadPart = inode;
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Status = RtlUTF8ToUnicodeN(fibdi->FileName, stringlen, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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*len -= needed;
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return STATUS_SUCCESS;
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}
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case FileIdFullDirectoryInformation:
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FIXME("STUB: FileIdFullDirectoryInformation\n");
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break;
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case FileNamesInformation:
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{
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FILE_NAMES_INFORMATION* fni = buf;
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TRACE("FileNamesInformation\n");
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needed = sizeof(FILE_NAMES_INFORMATION) - sizeof(WCHAR) + stringlen;
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if (needed > *len) {
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TRACE("buffer overflow - %u > %u\n", needed, *len);
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return STATUS_BUFFER_OVERFLOW;
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}
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fni->NextEntryOffset = 0;
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fni->FileIndex = 0;
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fni->FileNameLength = stringlen;
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Status = RtlUTF8ToUnicodeN(fni->FileName, stringlen, &stringlen, de->name, de->namelen);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
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return Status;
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}
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*len -= needed;
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return STATUS_SUCCESS;
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}
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case FileObjectIdInformation:
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FIXME("STUB: FileObjectIdInformation\n");
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return STATUS_NOT_IMPLEMENTED;
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case FileQuotaInformation:
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FIXME("STUB: FileQuotaInformation\n");
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return STATUS_NOT_IMPLEMENTED;
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case FileReparsePointInformation:
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FIXME("STUB: FileReparsePointInformation\n");
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return STATUS_NOT_IMPLEMENTED;
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default:
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WARN("Unknown FileInformationClass %u\n", IrpSp->Parameters.QueryDirectory.FileInformationClass);
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return STATUS_NOT_IMPLEMENTED;
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}
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return STATUS_NO_MORE_FILES;
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}
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static NTSTATUS STDCALL next_dir_entry(file_ref* fileref, UINT64* offset, dir_entry* de) {
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KEY searchkey;
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traverse_ptr tp, next_tp;
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DIR_ITEM* di;
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NTSTATUS Status;
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file_ref* fr;
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LIST_ENTRY* le;
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char* name;
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if (fileref->parent) { // don't return . and .. if root directory
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if (*offset == 0) {
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de->key.obj_id = fileref->fcb->inode;
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de->key.obj_type = TYPE_INODE_ITEM;
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de->key.offset = 0;
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de->dir_entry_type = DirEntryType_Self;
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de->name = ".";
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de->name_alloc = FALSE;
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de->namelen = 1;
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de->type = BTRFS_TYPE_DIRECTORY;
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*offset = 1;
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return STATUS_SUCCESS;
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} else if (*offset == 1) {
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de->key.obj_id = fileref->parent->fcb->inode;
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de->key.obj_type = TYPE_INODE_ITEM;
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de->key.offset = 0;
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de->dir_entry_type = DirEntryType_Parent;
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de->name = "..";
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de->name_alloc = FALSE;
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de->namelen = 2;
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de->type = BTRFS_TYPE_DIRECTORY;
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*offset = 2;
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return STATUS_SUCCESS;
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}
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}
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|
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if (*offset < 2)
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*offset = 2;
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ExAcquireResourceSharedLite(&fileref->nonpaged->children_lock, TRUE);
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fr = NULL;
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le = fileref->children.Flink;
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// skip entries before offset
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while (le != &fileref->children) {
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file_ref* fr2 = CONTAINING_RECORD(le, file_ref, list_entry);
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if (fr2->index >= *offset) {
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fr = fr2;
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break;
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}
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le = le->Flink;
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}
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do {
|
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if (fr && fr->index == *offset) {
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if (!fr->deleted) {
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if (fr->fcb->subvol == fileref->fcb->subvol) {
|
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de->key.obj_id = fr->fcb->inode;
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de->key.obj_type = TYPE_INODE_ITEM;
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de->key.offset = 0;
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} else {
|
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de->key.obj_id = fr->fcb->subvol->id;
|
|
de->key.obj_type = TYPE_ROOT_ITEM;
|
|
de->key.offset = 0;
|
|
}
|
|
|
|
name = fr->utf8.Buffer;
|
|
de->namelen = fr->utf8.Length;
|
|
de->type = fr->fcb->type;
|
|
de->dir_entry_type = DirEntryType_File;
|
|
|
|
(*offset)++;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
goto end;
|
|
} else {
|
|
(*offset)++;
|
|
fr = fr->list_entry.Flink == &fileref->children ? NULL : CONTAINING_RECORD(fr->list_entry.Flink, file_ref, list_entry);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
searchkey.obj_id = fileref->fcb->inode;
|
|
searchkey.obj_type = TYPE_DIR_INDEX;
|
|
searchkey.offset = *offset;
|
|
|
|
Status = find_item(fileref->fcb->Vcb, fileref->fcb->subvol, &tp, &searchkey, FALSE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("error - find_item returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
if (keycmp(&tp.item->key, &searchkey) == -1) {
|
|
if (find_next_item(fileref->fcb->Vcb, &tp, &next_tp, FALSE))
|
|
tp = next_tp;
|
|
}
|
|
|
|
if (keycmp(&tp.item->key, &searchkey) != -1 && tp.item->key.obj_id == searchkey.obj_id && tp.item->key.obj_type == searchkey.obj_type) {
|
|
do {
|
|
if (fr) {
|
|
if (fr->index <= tp.item->key.offset && !fr->deleted) {
|
|
if (fr->fcb->subvol == fileref->fcb->subvol) {
|
|
de->key.obj_id = fr->fcb->inode;
|
|
de->key.obj_type = TYPE_INODE_ITEM;
|
|
de->key.offset = 0;
|
|
} else {
|
|
de->key.obj_id = fr->fcb->subvol->id;
|
|
de->key.obj_type = TYPE_ROOT_ITEM;
|
|
de->key.offset = 0;
|
|
}
|
|
|
|
name = fr->utf8.Buffer;
|
|
de->namelen = fr->utf8.Length;
|
|
de->type = fr->fcb->type;
|
|
de->dir_entry_type = DirEntryType_File;
|
|
|
|
*offset = fr->index + 1;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
goto end;
|
|
}
|
|
|
|
if (fr->index == tp.item->key.offset && fr->deleted)
|
|
break;
|
|
|
|
fr = fr->list_entry.Flink == &fileref->children ? NULL : CONTAINING_RECORD(fr->list_entry.Flink, file_ref, list_entry);
|
|
}
|
|
} while (fr && fr->index < tp.item->key.offset);
|
|
|
|
if (fr && fr->index == tp.item->key.offset && fr->deleted) {
|
|
*offset = fr->index + 1;
|
|
fr = fr->list_entry.Flink == &fileref->children ? NULL : CONTAINING_RECORD(fr->list_entry.Flink, file_ref, list_entry);
|
|
continue;
|
|
}
|
|
|
|
*offset = tp.item->key.offset + 1;
|
|
|
|
di = (DIR_ITEM*)tp.item->data;
|
|
|
|
if (tp.item->size < sizeof(DIR_ITEM) || tp.item->size < sizeof(DIR_ITEM) - 1 + di->m + di->n) {
|
|
ERR("(%llx,%x,%llx) was %u bytes, expected at least %u\n", tp.item->key.obj_id, tp.item->key.obj_type, tp.item->key.offset, tp.item->size, sizeof(DIR_ITEM));
|
|
Status = STATUS_INTERNAL_ERROR;
|
|
goto end;
|
|
}
|
|
|
|
de->key = di->key;
|
|
name = di->name;
|
|
de->namelen = di->n;
|
|
de->type = di->type;
|
|
de->dir_entry_type = DirEntryType_File;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
goto end;
|
|
} else {
|
|
if (fr) {
|
|
if (fr->fcb->subvol == fileref->fcb->subvol) {
|
|
de->key.obj_id = fr->fcb->inode;
|
|
de->key.obj_type = TYPE_INODE_ITEM;
|
|
de->key.offset = 0;
|
|
} else {
|
|
de->key.obj_id = fr->fcb->subvol->id;
|
|
de->key.obj_type = TYPE_ROOT_ITEM;
|
|
de->key.offset = 0;
|
|
}
|
|
|
|
name = fr->utf8.Buffer;
|
|
de->namelen = fr->utf8.Length;
|
|
de->type = fr->fcb->type;
|
|
de->dir_entry_type = DirEntryType_File;
|
|
|
|
*offset = fr->index + 1;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
goto end;
|
|
} else {
|
|
Status = STATUS_NO_MORE_FILES;
|
|
goto end;
|
|
}
|
|
}
|
|
} while (TRUE);
|
|
|
|
end:
|
|
ExReleaseResourceLite(&fileref->nonpaged->children_lock);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
de->name_alloc = TRUE;
|
|
|
|
de->name = ExAllocatePoolWithTag(PagedPool, de->namelen, ALLOC_TAG);
|
|
if (!de->name) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(de->name, name, de->namelen);
|
|
} else
|
|
de->name_alloc = FALSE;
|
|
|
|
return Status;
|
|
}
|
|
|
|
static NTSTATUS STDCALL query_directory(PDEVICE_OBJECT DeviceObject, PIRP Irp) {
|
|
PIO_STACK_LOCATION IrpSp;
|
|
NTSTATUS Status, status2;
|
|
fcb* fcb;
|
|
ccb* ccb;
|
|
file_ref* fileref;
|
|
void* buf;
|
|
UINT8 *curitem, *lastitem;
|
|
LONG length;
|
|
ULONG count;
|
|
BOOL has_wildcard = FALSE, specific_file = FALSE, initial;
|
|
// UINT64 num_reads_orig;
|
|
dir_entry de;
|
|
UINT64 newoffset;
|
|
ANSI_STRING utf8;
|
|
|
|
TRACE("query directory\n");
|
|
|
|
// get_uid(); // TESTING
|
|
|
|
// num_reads_orig = num_reads;
|
|
|
|
IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
fcb = IrpSp->FileObject->FsContext;
|
|
ccb = IrpSp->FileObject->FsContext2;
|
|
fileref = ccb ? ccb->fileref : NULL;
|
|
|
|
utf8.Buffer = NULL;
|
|
|
|
if (!fileref)
|
|
return STATUS_INVALID_PARAMETER;
|
|
|
|
if (!ccb) {
|
|
ERR("ccb was NULL\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!(ccb->access & FILE_LIST_DIRECTORY)) {
|
|
WARN("insufficient privileges\n");
|
|
return STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
ExAcquireResourceSharedLite(&fcb->Vcb->tree_lock, TRUE);
|
|
|
|
TRACE("%S\n", file_desc(IrpSp->FileObject));
|
|
|
|
if (IrpSp->Flags == 0) {
|
|
TRACE("QD flags: (none)\n");
|
|
} else {
|
|
ULONG flags = IrpSp->Flags;
|
|
|
|
TRACE("QD flags:\n");
|
|
|
|
if (flags & SL_INDEX_SPECIFIED) {
|
|
TRACE(" SL_INDEX_SPECIFIED\n");
|
|
flags &= ~SL_INDEX_SPECIFIED;
|
|
}
|
|
|
|
if (flags & SL_RESTART_SCAN) {
|
|
TRACE(" SL_RESTART_SCAN\n");
|
|
flags &= ~SL_RESTART_SCAN;
|
|
}
|
|
|
|
if (flags & SL_RETURN_SINGLE_ENTRY) {
|
|
TRACE(" SL_RETURN_SINGLE_ENTRY\n");
|
|
flags &= ~SL_RETURN_SINGLE_ENTRY;
|
|
}
|
|
|
|
if (flags != 0)
|
|
TRACE(" unknown flags: %u\n", flags);
|
|
}
|
|
|
|
initial = !ccb->query_string.Buffer;
|
|
|
|
if (IrpSp->Flags & SL_RESTART_SCAN) {
|
|
ccb->query_dir_offset = 0;
|
|
|
|
if (ccb->query_string.Buffer) {
|
|
RtlFreeUnicodeString(&ccb->query_string);
|
|
ccb->query_string.Buffer = NULL;
|
|
}
|
|
}
|
|
|
|
if (IrpSp->Parameters.QueryDirectory.FileName && IrpSp->Parameters.QueryDirectory.FileName->Length > 1) {
|
|
TRACE("QD filename: %.*S\n", IrpSp->Parameters.QueryDirectory.FileName->Length / sizeof(WCHAR), IrpSp->Parameters.QueryDirectory.FileName->Buffer);
|
|
|
|
if (IrpSp->Parameters.QueryDirectory.FileName->Buffer[0] != '*') {
|
|
specific_file = TRUE;
|
|
if (FsRtlDoesNameContainWildCards(IrpSp->Parameters.QueryDirectory.FileName)) {
|
|
has_wildcard = TRUE;
|
|
specific_file = FALSE;
|
|
}
|
|
}
|
|
|
|
if (ccb->query_string.Buffer)
|
|
RtlFreeUnicodeString(&ccb->query_string);
|
|
|
|
if (has_wildcard)
|
|
RtlUpcaseUnicodeString(&ccb->query_string, IrpSp->Parameters.QueryDirectory.FileName, TRUE);
|
|
else {
|
|
ccb->query_string.Buffer = ExAllocatePoolWithTag(PagedPool, IrpSp->Parameters.QueryDirectory.FileName->Length, ALLOC_TAG);
|
|
if (!ccb->query_string.Buffer) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
ccb->query_string.Length = ccb->query_string.MaximumLength = IrpSp->Parameters.QueryDirectory.FileName->Length;
|
|
RtlCopyMemory(ccb->query_string.Buffer, IrpSp->Parameters.QueryDirectory.FileName->Buffer, IrpSp->Parameters.QueryDirectory.FileName->Length);
|
|
}
|
|
|
|
ccb->has_wildcard = has_wildcard;
|
|
ccb->specific_file = specific_file;
|
|
} else {
|
|
has_wildcard = ccb->has_wildcard;
|
|
specific_file = ccb->specific_file;
|
|
|
|
if (!(IrpSp->Flags & SL_RESTART_SCAN)) {
|
|
initial = FALSE;
|
|
|
|
if (specific_file) {
|
|
Status = STATUS_NO_MORE_FILES;
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ccb->query_string.Buffer) {
|
|
TRACE("query string = %.*S\n", ccb->query_string.Length / sizeof(WCHAR), ccb->query_string.Buffer);
|
|
}
|
|
|
|
newoffset = ccb->query_dir_offset;
|
|
Status = next_dir_entry(fileref, &newoffset, &de);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
if (Status == STATUS_NO_MORE_FILES && initial)
|
|
Status = STATUS_NO_SUCH_FILE;
|
|
goto end;
|
|
}
|
|
|
|
ccb->query_dir_offset = newoffset;
|
|
|
|
buf = map_user_buffer(Irp);
|
|
|
|
if (Irp->MdlAddress && !buf) {
|
|
ERR("MmGetSystemAddressForMdlSafe returned NULL\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
length = IrpSp->Parameters.QueryDirectory.Length;
|
|
|
|
if (specific_file) {
|
|
BOOL found = FALSE;
|
|
root* found_subvol;
|
|
UINT64 found_inode, found_index;
|
|
UINT8 found_type;
|
|
UNICODE_STRING us;
|
|
LIST_ENTRY* le;
|
|
|
|
Status = RtlUpcaseUnicodeString(&us, &ccb->query_string, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
ExAcquireResourceSharedLite(&fileref->nonpaged->children_lock, TRUE);
|
|
|
|
le = fileref->children.Flink;
|
|
while (le != &fileref->children) {
|
|
file_ref* fr2 = CONTAINING_RECORD(le, file_ref, list_entry);
|
|
|
|
if (!fr2->deleted && fr2->filepart_uc.Length == us.Length &&
|
|
RtlCompareMemory(fr2->filepart_uc.Buffer, us.Buffer, us.Length) == us.Length) {
|
|
found = TRUE;
|
|
|
|
if (fr2->fcb->subvol == fcb->subvol) {
|
|
de.key.obj_id = fr2->fcb->inode;
|
|
de.key.obj_type = TYPE_INODE_ITEM;
|
|
de.key.offset = 0;
|
|
} else {
|
|
de.key.obj_id = fr2->fcb->subvol->id;
|
|
de.key.obj_type = TYPE_ROOT_ITEM;
|
|
de.key.offset = 0;
|
|
}
|
|
|
|
de.name = ExAllocatePoolWithTag(PagedPool, fr2->utf8.Length, ALLOC_TAG);
|
|
if (!de.name) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
RtlCopyMemory(de.name, fr2->utf8.Buffer, fr2->utf8.Length);
|
|
|
|
de.name_alloc = TRUE;
|
|
de.namelen = fr2->utf8.Length;
|
|
de.type = fr2->fcb->type;
|
|
de.dir_entry_type = DirEntryType_File;
|
|
break;
|
|
}
|
|
|
|
le = le->Flink;
|
|
}
|
|
|
|
ExReleaseResourceLite(&fileref->nonpaged->children_lock);
|
|
|
|
if (us.Buffer)
|
|
ExFreePool(us.Buffer);
|
|
|
|
if (!found) {
|
|
Status = find_file_in_dir(fcb->Vcb, &ccb->query_string, fileref, &found_subvol, &found_inode, &found_type, &found_index, &utf8);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
Status = STATUS_NO_SUCH_FILE;
|
|
goto end;
|
|
}
|
|
|
|
if (found_subvol == fcb->subvol) {
|
|
de.key.obj_id = found_inode;
|
|
de.key.obj_type = TYPE_INODE_ITEM;
|
|
de.key.offset = 0;
|
|
} else {
|
|
de.key.obj_id = found_subvol->id;
|
|
de.key.obj_type = TYPE_ROOT_ITEM;
|
|
de.key.offset = 0;
|
|
}
|
|
|
|
de.name = utf8.Buffer;
|
|
de.name_alloc = FALSE;
|
|
de.namelen = utf8.Length;
|
|
de.type = found_type;
|
|
de.dir_entry_type = DirEntryType_File;
|
|
}
|
|
} else if (has_wildcard) {
|
|
WCHAR* uni_fn;
|
|
ULONG stringlen;
|
|
UNICODE_STRING di_uni_fn;
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, de.name, de.namelen);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
uni_fn = ExAllocatePoolWithTag(PagedPool, stringlen, ALLOC_TAG);
|
|
if (!uni_fn) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(uni_fn, stringlen, &stringlen, de.name, de.namelen);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
di_uni_fn.Length = di_uni_fn.MaximumLength = stringlen;
|
|
di_uni_fn.Buffer = uni_fn;
|
|
|
|
while (!FsRtlIsNameInExpression(&ccb->query_string, &di_uni_fn, TRUE, NULL)) {
|
|
if (de.name_alloc)
|
|
ExFreePool(de.name);
|
|
|
|
newoffset = ccb->query_dir_offset;
|
|
Status = next_dir_entry(fileref, &newoffset, &de);
|
|
|
|
ExFreePool(uni_fn);
|
|
if (NT_SUCCESS(Status)) {
|
|
ccb->query_dir_offset = newoffset;
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, de.name, de.namelen);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
uni_fn = ExAllocatePoolWithTag(PagedPool, stringlen, ALLOC_TAG);
|
|
if (!uni_fn) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(uni_fn, stringlen, &stringlen, de.name, de.namelen);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
ExFreePool(uni_fn);
|
|
goto end;
|
|
}
|
|
|
|
di_uni_fn.Length = di_uni_fn.MaximumLength = stringlen;
|
|
di_uni_fn.Buffer = uni_fn;
|
|
} else {
|
|
if (Status == STATUS_NO_MORE_FILES && initial)
|
|
Status = STATUS_NO_SUCH_FILE;
|
|
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
ExFreePool(uni_fn);
|
|
}
|
|
|
|
TRACE("file(0) = %.*s\n", de.namelen, de.name);
|
|
TRACE("offset = %u\n", ccb->query_dir_offset - 1);
|
|
|
|
Status = query_dir_item(fcb, fileref, buf, &length, Irp, &de, fcb->subvol);
|
|
|
|
if (de.name_alloc)
|
|
ExFreePool(de.name);
|
|
|
|
count = 0;
|
|
if (NT_SUCCESS(Status) && !(IrpSp->Flags & SL_RETURN_SINGLE_ENTRY) && !specific_file) {
|
|
lastitem = (UINT8*)buf;
|
|
|
|
while (length > 0) {
|
|
switch (IrpSp->Parameters.QueryDirectory.FileInformationClass) {
|
|
case FileBothDirectoryInformation:
|
|
case FileDirectoryInformation:
|
|
case FileIdBothDirectoryInformation:
|
|
case FileFullDirectoryInformation:
|
|
length -= length % 8;
|
|
break;
|
|
|
|
case FileNamesInformation:
|
|
length -= length % 4;
|
|
break;
|
|
|
|
default:
|
|
WARN("unhandled file information class %u\n", IrpSp->Parameters.QueryDirectory.FileInformationClass);
|
|
break;
|
|
}
|
|
|
|
if (length > 0) {
|
|
WCHAR* uni_fn = NULL;
|
|
UNICODE_STRING di_uni_fn;
|
|
|
|
newoffset = ccb->query_dir_offset;
|
|
Status = next_dir_entry(fileref, &newoffset, &de);
|
|
if (NT_SUCCESS(Status)) {
|
|
if (has_wildcard) {
|
|
ULONG stringlen;
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, de.name, de.namelen);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
if (de.name_alloc) ExFreePool(de.name);
|
|
goto end;
|
|
}
|
|
|
|
uni_fn = ExAllocatePoolWithTag(PagedPool, stringlen, ALLOC_TAG);
|
|
if (!uni_fn) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
if (de.name_alloc) ExFreePool(de.name);
|
|
goto end;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(uni_fn, stringlen, &stringlen, de.name, de.namelen);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN returned %08x\n", Status);
|
|
ExFreePool(uni_fn);
|
|
if (de.name_alloc) ExFreePool(de.name);
|
|
goto end;
|
|
}
|
|
|
|
di_uni_fn.Length = di_uni_fn.MaximumLength = stringlen;
|
|
di_uni_fn.Buffer = uni_fn;
|
|
}
|
|
|
|
if (!has_wildcard || FsRtlIsNameInExpression(&ccb->query_string, &di_uni_fn, TRUE, NULL)) {
|
|
curitem = (UINT8*)buf + IrpSp->Parameters.QueryDirectory.Length - length;
|
|
count++;
|
|
|
|
TRACE("file(%u) %u = %.*s\n", count, curitem - (UINT8*)buf, de.namelen, de.name);
|
|
TRACE("offset = %u\n", ccb->query_dir_offset - 1);
|
|
|
|
status2 = query_dir_item(fcb, fileref, curitem, &length, Irp, &de, fcb->subvol);
|
|
|
|
if (NT_SUCCESS(status2)) {
|
|
ULONG* lastoffset = (ULONG*)lastitem;
|
|
|
|
*lastoffset = (ULONG)(curitem - lastitem);
|
|
ccb->query_dir_offset = newoffset;
|
|
|
|
lastitem = curitem;
|
|
} else {
|
|
if (uni_fn) ExFreePool(uni_fn);
|
|
if (de.name_alloc) ExFreePool(de.name);
|
|
break;
|
|
}
|
|
} else
|
|
ccb->query_dir_offset = newoffset;
|
|
|
|
if (uni_fn) {
|
|
ExFreePool(uni_fn);
|
|
uni_fn = NULL;
|
|
}
|
|
|
|
if (de.name_alloc)
|
|
ExFreePool(de.name);
|
|
} else {
|
|
if (Status == STATUS_NO_MORE_FILES)
|
|
Status = STATUS_SUCCESS;
|
|
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
}
|
|
}
|
|
|
|
Irp->IoStatus.Information = IrpSp->Parameters.QueryDirectory.Length - length;
|
|
|
|
end:
|
|
ExReleaseResourceLite(&fcb->Vcb->tree_lock);
|
|
|
|
TRACE("returning %08x\n", Status);
|
|
|
|
if (utf8.Buffer)
|
|
ExFreePool(utf8.Buffer);
|
|
|
|
return Status;
|
|
}
|
|
|
|
static NTSTATUS STDCALL notify_change_directory(device_extension* Vcb, PIRP Irp) {
|
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
PFILE_OBJECT FileObject = IrpSp->FileObject;
|
|
fcb* fcb = FileObject->FsContext;
|
|
ccb* ccb = FileObject->FsContext2;
|
|
file_ref* fileref = ccb->fileref;
|
|
NTSTATUS Status;
|
|
|
|
TRACE("IRP_MN_NOTIFY_CHANGE_DIRECTORY\n");
|
|
|
|
if (!ccb) {
|
|
ERR("ccb was NULL\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!fileref) {
|
|
ERR("no fileref\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!(ccb->access & FILE_LIST_DIRECTORY)) {
|
|
WARN("insufficient privileges\n");
|
|
return STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
ExAcquireResourceSharedLite(&fcb->Vcb->tree_lock, TRUE);
|
|
ExAcquireResourceExclusiveLite(fcb->Header.Resource, TRUE);
|
|
|
|
if (fcb->type != BTRFS_TYPE_DIRECTORY) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto end;
|
|
}
|
|
|
|
// FIXME - raise exception if FCB marked for deletion?
|
|
|
|
TRACE("%S\n", file_desc(FileObject));
|
|
|
|
if (ccb->filename.Length == 0) {
|
|
Status = fileref_get_filename(fileref, &ccb->filename, NULL);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("fileref_get_filename returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
FsRtlNotifyFilterChangeDirectory(Vcb->NotifySync, &Vcb->DirNotifyList, FileObject->FsContext2, (PSTRING)&ccb->filename,
|
|
IrpSp->Flags & SL_WATCH_TREE, FALSE, IrpSp->Parameters.NotifyDirectory.CompletionFilter, Irp,
|
|
NULL, NULL, NULL);
|
|
|
|
Status = STATUS_PENDING;
|
|
|
|
end:
|
|
ExReleaseResourceLite(fcb->Header.Resource);
|
|
ExReleaseResourceLite(&fcb->Vcb->tree_lock);
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS STDCALL drv_directory_control(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
|
|
PIO_STACK_LOCATION IrpSp;
|
|
NTSTATUS Status;
|
|
ULONG func;
|
|
BOOL top_level;
|
|
device_extension* Vcb = DeviceObject->DeviceExtension;
|
|
|
|
TRACE("directory control\n");
|
|
|
|
FsRtlEnterFileSystem();
|
|
|
|
top_level = is_top_level(Irp);
|
|
|
|
if (Vcb && Vcb->type == VCB_TYPE_PARTITION0) {
|
|
Status = part0_passthrough(DeviceObject, Irp);
|
|
goto exit;
|
|
}
|
|
|
|
IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
Irp->IoStatus.Information = 0;
|
|
|
|
func = IrpSp->MinorFunction;
|
|
|
|
switch (func) {
|
|
case IRP_MN_NOTIFY_CHANGE_DIRECTORY:
|
|
Status = notify_change_directory(Vcb, Irp);
|
|
break;
|
|
|
|
case IRP_MN_QUERY_DIRECTORY:
|
|
Status = query_directory(DeviceObject, Irp);
|
|
break;
|
|
|
|
default:
|
|
WARN("unknown minor %u\n", func);
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
Irp->IoStatus.Status = Status;
|
|
break;
|
|
}
|
|
|
|
if (Status == STATUS_PENDING)
|
|
goto exit;
|
|
|
|
Irp->IoStatus.Status = Status;
|
|
|
|
// if (Irp->UserIosb)
|
|
// *Irp->UserIosb = Irp->IoStatus;
|
|
|
|
IoCompleteRequest(Irp, IO_DISK_INCREMENT);
|
|
|
|
exit:
|
|
if (top_level)
|
|
IoSetTopLevelIrp(NULL);
|
|
|
|
FsRtlExitFileSystem();
|
|
|
|
return Status;
|
|
}
|