mirror of
https://github.com/reactos/reactos.git
synced 2024-09-01 16:18:46 +00:00
3891 lines
136 KiB
C
3891 lines
136 KiB
C
/* Copyright (c) Mark Harmstone 2016-17
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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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#ifndef __REACTOS__
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#include <sys/stat.h>
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#endif /* __REACTOS__ */
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#include "btrfs_drv.h"
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#include <ntddstor.h>
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extern PDEVICE_OBJECT master_devobj;
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static WCHAR datastring[] = L"::$DATA";
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fcb* create_fcb(device_extension* Vcb, POOL_TYPE pool_type) {
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fcb* fcb;
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if (pool_type == NonPagedPool) {
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fcb = ExAllocatePoolWithTag(pool_type, sizeof(struct _fcb), ALLOC_TAG);
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if (!fcb) {
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ERR("out of memory\n");
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return NULL;
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}
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} else {
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fcb = ExAllocateFromPagedLookasideList(&Vcb->fcb_lookaside);
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if (!fcb) {
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ERR("out of memory\n");
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return NULL;
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}
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}
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#ifdef DEBUG_FCB_REFCOUNTS
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WARN("allocating fcb %p\n", fcb);
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#endif
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RtlZeroMemory(fcb, sizeof(struct _fcb));
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fcb->pool_type = pool_type;
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fcb->Header.NodeTypeCode = BTRFS_NODE_TYPE_FCB;
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fcb->Header.NodeByteSize = sizeof(struct _fcb);
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fcb->nonpaged = ExAllocateFromNPagedLookasideList(&Vcb->fcb_np_lookaside);
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if (!fcb->nonpaged) {
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ERR("out of memory\n");
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if (pool_type == NonPagedPool)
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ExFreePool(fcb);
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else
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ExFreeToPagedLookasideList(&Vcb->fcb_lookaside, fcb);
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return NULL;
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}
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RtlZeroMemory(fcb->nonpaged, sizeof(struct _fcb_nonpaged));
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ExInitializeResourceLite(&fcb->nonpaged->paging_resource);
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fcb->Header.PagingIoResource = &fcb->nonpaged->paging_resource;
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ExInitializeFastMutex(&fcb->nonpaged->HeaderMutex);
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FsRtlSetupAdvancedHeader(&fcb->Header, &fcb->nonpaged->HeaderMutex);
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fcb->refcount = 1;
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#ifdef DEBUG_FCB_REFCOUNTS
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WARN("fcb %p: refcount now %i\n", fcb, fcb->refcount);
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#endif
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ExInitializeResourceLite(&fcb->nonpaged->resource);
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fcb->Header.Resource = &fcb->nonpaged->resource;
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ExInitializeResourceLite(&fcb->nonpaged->dir_children_lock);
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FsRtlInitializeFileLock(&fcb->lock, NULL, NULL);
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InitializeListHead(&fcb->extents);
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InitializeListHead(&fcb->hardlinks);
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InitializeListHead(&fcb->xattrs);
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InitializeListHead(&fcb->dir_children_index);
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InitializeListHead(&fcb->dir_children_hash);
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InitializeListHead(&fcb->dir_children_hash_uc);
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return fcb;
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}
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file_ref* create_fileref(device_extension* Vcb) {
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file_ref* fr;
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fr = ExAllocateFromPagedLookasideList(&Vcb->fileref_lookaside);
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if (!fr) {
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ERR("out of memory\n");
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return NULL;
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}
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RtlZeroMemory(fr, sizeof(file_ref));
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fr->nonpaged = ExAllocateFromNPagedLookasideList(&Vcb->fileref_np_lookaside);
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if (!fr->nonpaged) {
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ERR("out of memory\n");
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ExFreeToPagedLookasideList(&Vcb->fileref_lookaside, fr);
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return NULL;
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}
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fr->refcount = 1;
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#ifdef DEBUG_FCB_REFCOUNTS
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WARN("fileref %p: refcount now 1\n", fr);
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#endif
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InitializeListHead(&fr->children);
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ExInitializeResourceLite(&fr->nonpaged->fileref_lock);
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ExInitializeResourceLite(&fr->nonpaged->children_lock);
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return fr;
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}
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NTSTATUS find_file_in_dir(PUNICODE_STRING filename, fcb* fcb, root** subvol, UINT64* inode, dir_child** pdc, BOOL case_sensitive) {
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NTSTATUS Status;
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UNICODE_STRING fnus;
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UINT32 hash;
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LIST_ENTRY* le;
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UINT8 c;
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BOOL locked = FALSE;
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if (!case_sensitive) {
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Status = RtlUpcaseUnicodeString(&fnus, filename, TRUE);
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
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return Status;
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}
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} else
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fnus = *filename;
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hash = calc_crc32c(0xffffffff, (UINT8*)fnus.Buffer, fnus.Length);
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c = hash >> 24;
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if (!ExIsResourceAcquiredSharedLite(&fcb->nonpaged->dir_children_lock)) {
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ExAcquireResourceSharedLite(&fcb->nonpaged->dir_children_lock, TRUE);
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locked = TRUE;
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}
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if (case_sensitive) {
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if (!fcb->hash_ptrs[c]) {
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Status = STATUS_OBJECT_NAME_NOT_FOUND;
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goto end;
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}
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le = fcb->hash_ptrs[c];
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while (le != &fcb->dir_children_hash) {
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dir_child* dc = CONTAINING_RECORD(le, dir_child, list_entry_hash);
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if (dc->hash == hash) {
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if (dc->name.Length == fnus.Length && RtlCompareMemory(dc->name.Buffer, fnus.Buffer, fnus.Length) == fnus.Length) {
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if (dc->key.obj_type == TYPE_ROOT_ITEM) {
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LIST_ENTRY* le2;
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*subvol = NULL;
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le2 = fcb->Vcb->roots.Flink;
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while (le2 != &fcb->Vcb->roots) {
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root* r2 = CONTAINING_RECORD(le2, root, list_entry);
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if (r2->id == dc->key.obj_id) {
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*subvol = r2;
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break;
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}
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le2 = le2->Flink;
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}
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*inode = SUBVOL_ROOT_INODE;
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} else {
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*subvol = fcb->subvol;
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*inode = dc->key.obj_id;
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}
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*pdc = dc;
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Status = STATUS_SUCCESS;
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goto end;
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}
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} else if (dc->hash > hash) {
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Status = STATUS_OBJECT_NAME_NOT_FOUND;
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goto end;
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}
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le = le->Flink;
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}
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} else {
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if (!fcb->hash_ptrs_uc[c]) {
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Status = STATUS_OBJECT_NAME_NOT_FOUND;
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goto end;
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}
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le = fcb->hash_ptrs_uc[c];
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while (le != &fcb->dir_children_hash_uc) {
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dir_child* dc = CONTAINING_RECORD(le, dir_child, list_entry_hash_uc);
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if (dc->hash_uc == hash) {
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if (dc->name_uc.Length == fnus.Length && RtlCompareMemory(dc->name_uc.Buffer, fnus.Buffer, fnus.Length) == fnus.Length) {
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if (dc->key.obj_type == TYPE_ROOT_ITEM) {
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LIST_ENTRY* le2;
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*subvol = NULL;
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le2 = fcb->Vcb->roots.Flink;
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while (le2 != &fcb->Vcb->roots) {
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root* r2 = CONTAINING_RECORD(le2, root, list_entry);
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if (r2->id == dc->key.obj_id) {
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*subvol = r2;
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break;
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}
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le2 = le2->Flink;
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}
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*inode = SUBVOL_ROOT_INODE;
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} else {
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*subvol = fcb->subvol;
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*inode = dc->key.obj_id;
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}
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*pdc = dc;
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Status = STATUS_SUCCESS;
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goto end;
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}
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} else if (dc->hash_uc > hash) {
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Status = STATUS_OBJECT_NAME_NOT_FOUND;
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goto end;
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}
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le = le->Flink;
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}
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}
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Status = STATUS_OBJECT_NAME_NOT_FOUND;
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end:
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if (locked)
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ExReleaseResourceLite(&fcb->nonpaged->dir_children_lock);
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if (!case_sensitive)
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ExFreePool(fnus.Buffer);
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return Status;
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}
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static NTSTATUS split_path(device_extension* Vcb, PUNICODE_STRING path, LIST_ENTRY* parts, BOOL* stream) {
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ULONG len, i;
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BOOL has_stream;
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WCHAR* buf;
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name_bit* nb;
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len = path->Length / sizeof(WCHAR);
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if (len > 0 && (path->Buffer[len - 1] == '/' || path->Buffer[len - 1] == '\\'))
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len--;
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has_stream = FALSE;
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for (i = 0; i < len; i++) {
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if (path->Buffer[i] == '/' || path->Buffer[i] == '\\') {
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has_stream = FALSE;
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} else if (path->Buffer[i] == ':') {
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has_stream = TRUE;
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}
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}
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buf = path->Buffer;
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for (i = 0; i < len; i++) {
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if (path->Buffer[i] == '/' || path->Buffer[i] == '\\') {
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nb = ExAllocateFromPagedLookasideList(&Vcb->name_bit_lookaside);
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if (!nb) {
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ERR("out of memory\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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nb->us.Buffer = buf;
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nb->us.Length = nb->us.MaximumLength = (USHORT)(&path->Buffer[i] - buf) * sizeof(WCHAR);
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InsertTailList(parts, &nb->list_entry);
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buf = &path->Buffer[i+1];
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}
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}
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nb = ExAllocateFromPagedLookasideList(&Vcb->name_bit_lookaside);
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if (!nb) {
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ERR("out of memory\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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nb->us.Buffer = buf;
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nb->us.Length = nb->us.MaximumLength = (USHORT)(&path->Buffer[i] - buf) * sizeof(WCHAR);
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InsertTailList(parts, &nb->list_entry);
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if (has_stream) {
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static WCHAR datasuf[] = {':','$','D','A','T','A',0};
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UNICODE_STRING dsus;
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dsus.Buffer = datasuf;
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dsus.Length = dsus.MaximumLength = (UINT16)wcslen(datasuf) * sizeof(WCHAR);
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for (i = 0; i < nb->us.Length / sizeof(WCHAR); i++) {
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if (nb->us.Buffer[i] == ':') {
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name_bit* nb2;
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nb2 = ExAllocateFromPagedLookasideList(&Vcb->name_bit_lookaside);
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if (!nb2) {
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ERR("out of memory\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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nb2->us.Buffer = &nb->us.Buffer[i+1];
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nb2->us.Length = nb2->us.MaximumLength = (UINT16)(nb->us.Length - (i * sizeof(WCHAR)) - sizeof(WCHAR));
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InsertTailList(parts, &nb2->list_entry);
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nb->us.Length = (UINT16)i * sizeof(WCHAR);
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nb->us.MaximumLength = nb->us.Length;
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nb = nb2;
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break;
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}
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}
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// FIXME - should comparison be case-insensitive?
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// remove :$DATA suffix
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if (nb->us.Length >= dsus.Length && RtlCompareMemory(&nb->us.Buffer[(nb->us.Length - dsus.Length)/sizeof(WCHAR)], dsus.Buffer, dsus.Length) == dsus.Length)
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nb->us.Length -= dsus.Length;
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if (nb->us.Length == 0) {
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RemoveTailList(parts);
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ExFreeToPagedLookasideList(&Vcb->name_bit_lookaside, nb);
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has_stream = FALSE;
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}
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}
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// if path is just stream name, remove first empty item
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if (has_stream && path->Length >= sizeof(WCHAR) && path->Buffer[0] == ':') {
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name_bit *nb1 = CONTAINING_RECORD(RemoveHeadList(parts), name_bit, list_entry);
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ExFreeToPagedLookasideList(&Vcb->name_bit_lookaside, nb1);
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}
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*stream = has_stream;
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return STATUS_SUCCESS;
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}
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NTSTATUS load_csum(_Requires_lock_held_(_Curr_->tree_lock) device_extension* Vcb, UINT32* csum, UINT64 start, UINT64 length, PIRP Irp) {
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NTSTATUS Status;
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KEY searchkey;
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traverse_ptr tp, next_tp;
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UINT64 i, j;
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BOOL b;
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searchkey.obj_id = EXTENT_CSUM_ID;
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searchkey.obj_type = TYPE_EXTENT_CSUM;
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searchkey.offset = start;
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Status = find_item(Vcb, Vcb->checksum_root, &tp, &searchkey, FALSE, Irp);
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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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i = 0;
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do {
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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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ULONG readlen;
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if (start < tp.item->key.offset)
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j = 0;
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else
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j = ((start - tp.item->key.offset) / Vcb->superblock.sector_size) + i;
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if (j * sizeof(UINT32) > tp.item->size || tp.item->key.offset > start + (i * Vcb->superblock.sector_size)) {
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ERR("checksum not found for %llx\n", start + (i * Vcb->superblock.sector_size));
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return STATUS_INTERNAL_ERROR;
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}
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readlen = (ULONG)min((tp.item->size / sizeof(UINT32)) - j, length - i);
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RtlCopyMemory(&csum[i], tp.item->data + (j * sizeof(UINT32)), readlen * sizeof(UINT32));
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i += readlen;
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if (i == length)
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break;
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}
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b = find_next_item(Vcb, &tp, &next_tp, FALSE, Irp);
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if (b)
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tp = next_tp;
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} while (b);
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if (i < length) {
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ERR("could not read checksums: offset %llx, length %llx sectors\n", start, length);
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return STATUS_INTERNAL_ERROR;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS load_dir_children(_Requires_lock_held_(_Curr_->tree_lock) device_extension* Vcb, fcb* fcb, BOOL ignore_size, PIRP Irp) {
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KEY searchkey;
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traverse_ptr tp, next_tp;
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NTSTATUS Status;
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ULONG num_children = 0;
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fcb->hash_ptrs = ExAllocatePoolWithTag(PagedPool, sizeof(LIST_ENTRY*) * 256, ALLOC_TAG);
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if (!fcb->hash_ptrs) {
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ERR("out of memory\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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RtlZeroMemory(fcb->hash_ptrs, sizeof(LIST_ENTRY*) * 256);
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|
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fcb->hash_ptrs_uc = ExAllocatePoolWithTag(PagedPool, sizeof(LIST_ENTRY*) * 256, ALLOC_TAG);
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if (!fcb->hash_ptrs_uc) {
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ERR("out of memory\n");
|
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return STATUS_INSUFFICIENT_RESOURCES;
|
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}
|
|
|
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RtlZeroMemory(fcb->hash_ptrs_uc, sizeof(LIST_ENTRY*) * 256);
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|
|
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if (!ignore_size && fcb->inode_item.st_size == 0)
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return STATUS_SUCCESS;
|
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|
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searchkey.obj_id = fcb->inode;
|
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searchkey.obj_type = TYPE_DIR_INDEX;
|
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searchkey.offset = 2;
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|
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Status = find_item(Vcb, fcb->subvol, &tp, &searchkey, FALSE, Irp);
|
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if (!NT_SUCCESS(Status)) {
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ERR("find_item returned %08x\n", Status);
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return Status;
|
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}
|
|
|
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if (keycmp(tp.item->key, searchkey) == -1) {
|
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if (find_next_item(Vcb, &tp, &next_tp, FALSE, Irp)) {
|
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tp = next_tp;
|
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TRACE("moving on to %llx,%x,%llx\n", tp.item->key.obj_id, tp.item->key.obj_type, tp.item->key.offset);
|
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}
|
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}
|
|
|
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while (tp.item->key.obj_id == searchkey.obj_id && tp.item->key.obj_type == searchkey.obj_type) {
|
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DIR_ITEM* di = (DIR_ITEM*)tp.item->data;
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dir_child* dc;
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ULONG utf16len;
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|
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if (tp.item->size < sizeof(DIR_ITEM)) {
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WARN("(%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));
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goto cont;
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}
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|
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if (di->n == 0) {
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WARN("(%llx,%x,%llx): DIR_ITEM name length is zero\n", tp.item->key.obj_id, tp.item->key.obj_type, tp.item->key.offset);
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goto cont;
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}
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|
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Status = RtlUTF8ToUnicodeN(NULL, 0, &utf16len, di->name, di->n);
|
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if (!NT_SUCCESS(Status)) {
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ERR("RtlUTF8ToUnicodeN 1 returned %08x\n", Status);
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goto cont;
|
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}
|
|
|
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dc = ExAllocatePoolWithTag(PagedPool, sizeof(dir_child), ALLOC_TAG);
|
|
if (!dc) {
|
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ERR("out of memory\n");
|
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return STATUS_INSUFFICIENT_RESOURCES;
|
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}
|
|
|
|
dc->key = di->key;
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dc->index = tp.item->key.offset;
|
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dc->type = di->type;
|
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dc->fileref = NULL;
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|
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dc->utf8.MaximumLength = dc->utf8.Length = di->n;
|
|
dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, di->n, ALLOC_TAG);
|
|
if (!dc->utf8.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(dc->utf8.Buffer, di->name, di->n);
|
|
|
|
dc->name.MaximumLength = dc->name.Length = (UINT16)utf16len;
|
|
dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, dc->name.MaximumLength, ALLOC_TAG);
|
|
if (!dc->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(dc->name.Buffer, utf16len, &utf16len, di->name, di->n);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 2 returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
goto cont;
|
|
}
|
|
|
|
Status = RtlUpcaseUnicodeString(&dc->name_uc, &dc->name, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
goto cont;
|
|
}
|
|
|
|
dc->hash = calc_crc32c(0xffffffff, (UINT8*)dc->name.Buffer, dc->name.Length);
|
|
dc->hash_uc = calc_crc32c(0xffffffff, (UINT8*)dc->name_uc.Buffer, dc->name_uc.Length);
|
|
|
|
InsertTailList(&fcb->dir_children_index, &dc->list_entry_index);
|
|
|
|
insert_dir_child_into_hash_lists(fcb, dc);
|
|
|
|
num_children++;
|
|
|
|
cont:
|
|
if (find_next_item(Vcb, &tp, &next_tp, FALSE, Irp))
|
|
tp = next_tp;
|
|
else
|
|
break;
|
|
}
|
|
|
|
// If a directory has a lot of files, force it to stick around until the next flush
|
|
// so we aren't constantly re-reading.
|
|
if (num_children >= 100)
|
|
mark_fcb_dirty(fcb);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS open_fcb(_Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) device_extension* Vcb,
|
|
root* subvol, UINT64 inode, UINT8 type, PANSI_STRING utf8, fcb* parent, fcb** pfcb, POOL_TYPE pooltype, PIRP Irp) {
|
|
KEY searchkey;
|
|
traverse_ptr tp, next_tp;
|
|
NTSTATUS Status;
|
|
fcb *fcb, *deleted_fcb = NULL;
|
|
BOOL atts_set = FALSE, sd_set = FALSE, no_data;
|
|
LIST_ENTRY* lastle = NULL;
|
|
EXTENT_DATA* ed = NULL;
|
|
|
|
if (!IsListEmpty(&subvol->fcbs)) {
|
|
LIST_ENTRY* le = subvol->fcbs.Flink;
|
|
|
|
while (le != &subvol->fcbs) {
|
|
fcb = CONTAINING_RECORD(le, struct _fcb, list_entry);
|
|
|
|
if (fcb->inode == inode) {
|
|
if (!fcb->ads) {
|
|
if (fcb->deleted)
|
|
deleted_fcb = fcb;
|
|
else {
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG rc = InterlockedIncrement(&fcb->refcount);
|
|
|
|
WARN("fcb %p: refcount now %i (subvol %llx, inode %llx)\n", fcb, rc, fcb->subvol->id, fcb->inode);
|
|
#else
|
|
InterlockedIncrement(&fcb->refcount);
|
|
#endif
|
|
|
|
*pfcb = fcb;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
}
|
|
} else if (fcb->inode > inode) {
|
|
if (deleted_fcb) {
|
|
InterlockedIncrement(&deleted_fcb->refcount);
|
|
*pfcb = deleted_fcb;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
lastle = le->Blink;
|
|
break;
|
|
}
|
|
|
|
le = le->Flink;
|
|
}
|
|
}
|
|
|
|
if (deleted_fcb) {
|
|
InterlockedIncrement(&deleted_fcb->refcount);
|
|
*pfcb = deleted_fcb;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
fcb = create_fcb(Vcb, pooltype);
|
|
if (!fcb) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fcb->Vcb = Vcb;
|
|
|
|
fcb->subvol = subvol;
|
|
fcb->inode = inode;
|
|
fcb->type = type;
|
|
|
|
searchkey.obj_id = inode;
|
|
searchkey.obj_type = TYPE_INODE_ITEM;
|
|
searchkey.offset = 0xffffffffffffffff;
|
|
|
|
Status = find_item(Vcb, subvol, &tp, &searchkey, FALSE, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("error - find_item returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
if (tp.item->key.obj_id != searchkey.obj_id || tp.item->key.obj_type != searchkey.obj_type) {
|
|
WARN("couldn't find INODE_ITEM for inode %llx in subvol %llx\n", inode, subvol->id);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (tp.item->size > 0)
|
|
RtlCopyMemory(&fcb->inode_item, tp.item->data, min(sizeof(INODE_ITEM), tp.item->size));
|
|
|
|
if (fcb->type == 0) { // guess the type from the inode mode, if the caller doesn't know already
|
|
if ((fcb->inode_item.st_mode & __S_IFDIR) == __S_IFDIR)
|
|
fcb->type = BTRFS_TYPE_DIRECTORY;
|
|
else if ((fcb->inode_item.st_mode & __S_IFCHR) == __S_IFCHR)
|
|
fcb->type = BTRFS_TYPE_CHARDEV;
|
|
else if ((fcb->inode_item.st_mode & __S_IFBLK) == __S_IFBLK)
|
|
fcb->type = BTRFS_TYPE_BLOCKDEV;
|
|
else if ((fcb->inode_item.st_mode & __S_IFIFO) == __S_IFIFO)
|
|
fcb->type = BTRFS_TYPE_FIFO;
|
|
else if ((fcb->inode_item.st_mode & __S_IFLNK) == __S_IFLNK)
|
|
fcb->type = BTRFS_TYPE_SYMLINK;
|
|
else if ((fcb->inode_item.st_mode & __S_IFSOCK) == __S_IFSOCK)
|
|
fcb->type = BTRFS_TYPE_SOCKET;
|
|
else
|
|
fcb->type = BTRFS_TYPE_FILE;
|
|
}
|
|
|
|
no_data = fcb->inode_item.st_size == 0 || (fcb->type != BTRFS_TYPE_FILE && fcb->type != BTRFS_TYPE_SYMLINK);
|
|
|
|
while (find_next_item(Vcb, &tp, &next_tp, FALSE, Irp)) {
|
|
tp = next_tp;
|
|
|
|
if (tp.item->key.obj_id > inode)
|
|
break;
|
|
|
|
if ((no_data && tp.item->key.obj_type > TYPE_XATTR_ITEM) || tp.item->key.obj_type > TYPE_EXTENT_DATA)
|
|
break;
|
|
|
|
if (fcb->inode_item.st_nlink > 1 && tp.item->key.obj_type == TYPE_INODE_REF) {
|
|
ULONG len;
|
|
INODE_REF* ir;
|
|
|
|
len = tp.item->size;
|
|
ir = (INODE_REF*)tp.item->data;
|
|
|
|
while (len >= sizeof(INODE_REF) - 1) {
|
|
hardlink* hl;
|
|
ULONG stringlen;
|
|
|
|
hl = ExAllocatePoolWithTag(pooltype, sizeof(hardlink), ALLOC_TAG);
|
|
if (!hl) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
hl->parent = tp.item->key.offset;
|
|
hl->index = ir->index;
|
|
|
|
hl->utf8.Length = hl->utf8.MaximumLength = ir->n;
|
|
|
|
if (hl->utf8.Length > 0) {
|
|
hl->utf8.Buffer = ExAllocatePoolWithTag(pooltype, hl->utf8.MaximumLength, ALLOC_TAG);
|
|
RtlCopyMemory(hl->utf8.Buffer, ir->name, ir->n);
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, ir->name, ir->n);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 1 returned %08x\n", Status);
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
hl->name.Length = hl->name.MaximumLength = (UINT16)stringlen;
|
|
|
|
if (stringlen == 0)
|
|
hl->name.Buffer = NULL;
|
|
else {
|
|
hl->name.Buffer = ExAllocatePoolWithTag(pooltype, hl->name.MaximumLength, ALLOC_TAG);
|
|
|
|
if (!hl->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(hl->name.Buffer, stringlen, &stringlen, ir->name, ir->n);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 2 returned %08x\n", Status);
|
|
ExFreePool(hl->name.Buffer);
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
InsertTailList(&fcb->hardlinks, &hl->list_entry);
|
|
|
|
len -= sizeof(INODE_REF) - 1 + ir->n;
|
|
ir = (INODE_REF*)&ir->name[ir->n];
|
|
}
|
|
} else if (fcb->inode_item.st_nlink > 1 && tp.item->key.obj_type == TYPE_INODE_EXTREF) {
|
|
ULONG len;
|
|
INODE_EXTREF* ier;
|
|
|
|
len = tp.item->size;
|
|
ier = (INODE_EXTREF*)tp.item->data;
|
|
|
|
while (len >= sizeof(INODE_EXTREF) - 1) {
|
|
hardlink* hl;
|
|
ULONG stringlen;
|
|
|
|
hl = ExAllocatePoolWithTag(pooltype, sizeof(hardlink), ALLOC_TAG);
|
|
if (!hl) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
hl->parent = ier->dir;
|
|
hl->index = ier->index;
|
|
|
|
hl->utf8.Length = hl->utf8.MaximumLength = ier->n;
|
|
|
|
if (hl->utf8.Length > 0) {
|
|
hl->utf8.Buffer = ExAllocatePoolWithTag(pooltype, hl->utf8.MaximumLength, ALLOC_TAG);
|
|
RtlCopyMemory(hl->utf8.Buffer, ier->name, ier->n);
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, ier->name, ier->n);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 1 returned %08x\n", Status);
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
hl->name.Length = hl->name.MaximumLength = (UINT16)stringlen;
|
|
|
|
if (stringlen == 0)
|
|
hl->name.Buffer = NULL;
|
|
else {
|
|
hl->name.Buffer = ExAllocatePoolWithTag(pooltype, hl->name.MaximumLength, ALLOC_TAG);
|
|
|
|
if (!hl->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(hl->name.Buffer, stringlen, &stringlen, ier->name, ier->n);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 2 returned %08x\n", Status);
|
|
ExFreePool(hl->name.Buffer);
|
|
ExFreePool(hl);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
InsertTailList(&fcb->hardlinks, &hl->list_entry);
|
|
|
|
len -= sizeof(INODE_EXTREF) - 1 + ier->n;
|
|
ier = (INODE_EXTREF*)&ier->name[ier->n];
|
|
}
|
|
} else if (tp.item->key.obj_type == TYPE_XATTR_ITEM) {
|
|
ULONG len;
|
|
DIR_ITEM* di;
|
|
|
|
static char xapref[] = "user.";
|
|
|
|
if (tp.item->size < offsetof(DIR_ITEM, name[0])) {
|
|
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, offsetof(DIR_ITEM, name[0]));
|
|
continue;
|
|
}
|
|
|
|
len = tp.item->size;
|
|
di = (DIR_ITEM*)tp.item->data;
|
|
|
|
do {
|
|
if (len < offsetof(DIR_ITEM, name[0]) + di->m + di->n)
|
|
break;
|
|
|
|
if (tp.item->key.offset == EA_REPARSE_HASH && di->n == strlen(EA_REPARSE) && RtlCompareMemory(EA_REPARSE, di->name, di->n) == di->n) {
|
|
if (di->m > 0) {
|
|
fcb->reparse_xattr.Buffer = ExAllocatePoolWithTag(PagedPool, di->m, ALLOC_TAG);
|
|
if (!fcb->reparse_xattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(fcb->reparse_xattr.Buffer, &di->name[di->n], di->m);
|
|
} else
|
|
fcb->reparse_xattr.Buffer = NULL;
|
|
|
|
fcb->reparse_xattr.Length = fcb->reparse_xattr.MaximumLength = di->m;
|
|
} else if (tp.item->key.offset == EA_EA_HASH && di->n == strlen(EA_EA) && RtlCompareMemory(EA_EA, di->name, di->n) == di->n) {
|
|
if (di->m > 0) {
|
|
ULONG offset;
|
|
|
|
Status = IoCheckEaBufferValidity((FILE_FULL_EA_INFORMATION*)&di->name[di->n], di->m, &offset);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
WARN("IoCheckEaBufferValidity returned %08x (error at offset %u)\n", Status, offset);
|
|
else {
|
|
FILE_FULL_EA_INFORMATION* eainfo;
|
|
|
|
fcb->ea_xattr.Buffer = ExAllocatePoolWithTag(PagedPool, di->m, ALLOC_TAG);
|
|
if (!fcb->ea_xattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(fcb->ea_xattr.Buffer, &di->name[di->n], di->m);
|
|
|
|
fcb->ea_xattr.Length = fcb->ea_xattr.MaximumLength = di->m;
|
|
|
|
fcb->ealen = 4;
|
|
|
|
// calculate ealen
|
|
eainfo = (FILE_FULL_EA_INFORMATION*)&di->name[di->n];
|
|
do {
|
|
fcb->ealen += 5 + eainfo->EaNameLength + eainfo->EaValueLength;
|
|
|
|
if (eainfo->NextEntryOffset == 0)
|
|
break;
|
|
|
|
eainfo = (FILE_FULL_EA_INFORMATION*)(((UINT8*)eainfo) + eainfo->NextEntryOffset);
|
|
} while (TRUE);
|
|
}
|
|
}
|
|
} else if (tp.item->key.offset == EA_DOSATTRIB_HASH && di->n == strlen(EA_DOSATTRIB) && RtlCompareMemory(EA_DOSATTRIB, di->name, di->n) == di->n) {
|
|
if (di->m > 0) {
|
|
if (get_file_attributes_from_xattr(&di->name[di->n], di->m, &fcb->atts)) {
|
|
atts_set = TRUE;
|
|
|
|
if (fcb->type == BTRFS_TYPE_DIRECTORY)
|
|
fcb->atts |= FILE_ATTRIBUTE_DIRECTORY;
|
|
else if (fcb->type == BTRFS_TYPE_SYMLINK)
|
|
fcb->atts |= FILE_ATTRIBUTE_REPARSE_POINT;
|
|
|
|
if (fcb->type != BTRFS_TYPE_DIRECTORY)
|
|
fcb->atts &= ~FILE_ATTRIBUTE_DIRECTORY;
|
|
|
|
if (inode == SUBVOL_ROOT_INODE) {
|
|
if (subvol->root_item.flags & BTRFS_SUBVOL_READONLY)
|
|
fcb->atts |= FILE_ATTRIBUTE_READONLY;
|
|
else
|
|
fcb->atts &= ~FILE_ATTRIBUTE_READONLY;
|
|
}
|
|
}
|
|
}
|
|
} else if (tp.item->key.offset == EA_NTACL_HASH && di->n == strlen(EA_NTACL) && RtlCompareMemory(EA_NTACL, di->name, di->n) == di->n) {
|
|
if (di->m > 0) {
|
|
fcb->sd = ExAllocatePoolWithTag(PagedPool, di->m, ALLOC_TAG);
|
|
if (!fcb->sd) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(fcb->sd, &di->name[di->n], di->m);
|
|
|
|
// We have to test against our copy rather than the source, as RtlValidRelativeSecurityDescriptor
|
|
// will fail if the ACLs aren't 32-bit aligned.
|
|
if (!RtlValidRelativeSecurityDescriptor(fcb->sd, di->m, 0))
|
|
ExFreePool(fcb->sd);
|
|
else
|
|
sd_set = TRUE;
|
|
}
|
|
} else if (tp.item->key.offset == EA_PROP_COMPRESSION_HASH && di->n == strlen(EA_PROP_COMPRESSION) && RtlCompareMemory(EA_PROP_COMPRESSION, di->name, di->n) == di->n) {
|
|
if (di->m > 0) {
|
|
const char lzo[] = "lzo";
|
|
const char zlib[] = "zlib";
|
|
|
|
if (di->m == strlen(lzo) && RtlCompareMemory(&di->name[di->n], lzo, di->m) == di->m)
|
|
fcb->prop_compression = PropCompression_LZO;
|
|
else if (di->m == strlen(zlib) && RtlCompareMemory(&di->name[di->n], zlib, di->m) == di->m)
|
|
fcb->prop_compression = PropCompression_Zlib;
|
|
else
|
|
fcb->prop_compression = PropCompression_None;
|
|
}
|
|
} else if (di->n > strlen(xapref) && RtlCompareMemory(xapref, di->name, strlen(xapref)) == strlen(xapref)) {
|
|
dir_child* dc;
|
|
ULONG utf16len;
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &utf16len, &di->name[strlen(xapref)], di->n - (ULONG)strlen(xapref));
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 1 returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
dc = ExAllocatePoolWithTag(PagedPool, sizeof(dir_child), ALLOC_TAG);
|
|
if (!dc) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlZeroMemory(dc, sizeof(dir_child));
|
|
|
|
dc->utf8.MaximumLength = dc->utf8.Length = di->n - (UINT16)strlen(xapref);
|
|
dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, dc->utf8.MaximumLength, ALLOC_TAG);
|
|
if (!dc->utf8.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(dc->utf8.Buffer, &di->name[strlen(xapref)], dc->utf8.Length);
|
|
|
|
dc->name.MaximumLength = dc->name.Length = (UINT16)utf16len;
|
|
dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, dc->name.MaximumLength, ALLOC_TAG);
|
|
if (!dc->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlUTF8ToUnicodeN(dc->name.Buffer, utf16len, &utf16len, dc->utf8.Buffer, dc->utf8.Length);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 2 returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
Status = RtlUpcaseUnicodeString(&dc->name_uc, &dc->name, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
dc->size = di->m;
|
|
|
|
InsertTailList(&fcb->dir_children_index, &dc->list_entry_index);
|
|
} else {
|
|
xattr* xa;
|
|
|
|
xa = ExAllocatePoolWithTag(PagedPool, offsetof(xattr, data[0]) + di->m + di->n, ALLOC_TAG);
|
|
if (!xa) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
xa->namelen = di->n;
|
|
xa->valuelen = di->m;
|
|
xa->dirty = FALSE;
|
|
RtlCopyMemory(xa->data, di->name, di->m + di->n);
|
|
|
|
InsertTailList(&fcb->xattrs, &xa->list_entry);
|
|
}
|
|
|
|
len -= (ULONG)offsetof(DIR_ITEM, name[0]) + di->m + di->n;
|
|
|
|
if (len < offsetof(DIR_ITEM, name[0]))
|
|
break;
|
|
|
|
di = (DIR_ITEM*)&di->name[di->m + di->n];
|
|
} while (TRUE);
|
|
} else if (tp.item->key.obj_type == TYPE_EXTENT_DATA) {
|
|
extent* ext;
|
|
BOOL unique = FALSE;
|
|
|
|
ed = (EXTENT_DATA*)tp.item->data;
|
|
|
|
if (tp.item->size < sizeof(EXTENT_DATA)) {
|
|
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(EXTENT_DATA));
|
|
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (ed->type == EXTENT_TYPE_REGULAR || ed->type == EXTENT_TYPE_PREALLOC) {
|
|
EXTENT_DATA2* ed2 = (EXTENT_DATA2*)&ed->data[0];
|
|
|
|
if (tp.item->size < sizeof(EXTENT_DATA) - 1 + sizeof(EXTENT_DATA2)) {
|
|
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(EXTENT_DATA) - 1 + sizeof(EXTENT_DATA2));
|
|
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (ed2->address == 0 || ed2->size == 0) // sparse
|
|
continue;
|
|
|
|
if (ed2->size != 0 && is_tree_unique(Vcb, tp.tree, Irp))
|
|
unique = is_extent_unique(Vcb, ed2->address, ed2->size, Irp);
|
|
}
|
|
|
|
ext = ExAllocatePoolWithTag(pooltype, offsetof(extent, extent_data) + tp.item->size, ALLOC_TAG);
|
|
if (!ext) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
ext->offset = tp.item->key.offset;
|
|
RtlCopyMemory(&ext->extent_data, tp.item->data, tp.item->size);
|
|
ext->datalen = tp.item->size;
|
|
ext->unique = unique;
|
|
ext->ignore = FALSE;
|
|
ext->inserted = FALSE;
|
|
ext->csum = NULL;
|
|
|
|
InsertTailList(&fcb->extents, &ext->list_entry);
|
|
}
|
|
}
|
|
|
|
if (fcb->type == BTRFS_TYPE_DIRECTORY) {
|
|
Status = load_dir_children(Vcb, fcb, FALSE, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("load_dir_children returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if (no_data) {
|
|
fcb->Header.AllocationSize.QuadPart = 0;
|
|
fcb->Header.FileSize.QuadPart = 0;
|
|
fcb->Header.ValidDataLength.QuadPart = 0;
|
|
} else {
|
|
if (ed && ed->type == EXTENT_TYPE_INLINE)
|
|
fcb->Header.AllocationSize.QuadPart = fcb->inode_item.st_size;
|
|
else
|
|
fcb->Header.AllocationSize.QuadPart = sector_align(fcb->inode_item.st_size, fcb->Vcb->superblock.sector_size);
|
|
|
|
fcb->Header.FileSize.QuadPart = fcb->inode_item.st_size;
|
|
fcb->Header.ValidDataLength.QuadPart = fcb->inode_item.st_size;
|
|
}
|
|
|
|
if (!atts_set)
|
|
fcb->atts = get_file_attributes(Vcb, fcb->subvol, fcb->inode, fcb->type, utf8 && utf8->Buffer[0] == '.', TRUE, Irp);
|
|
|
|
if (!sd_set)
|
|
fcb_get_sd(fcb, parent, FALSE, Irp);
|
|
|
|
if (fcb->type == BTRFS_TYPE_DIRECTORY && fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT && fcb->reparse_xattr.Length == 0) {
|
|
fcb->atts &= ~FILE_ATTRIBUTE_REPARSE_POINT;
|
|
|
|
if (!Vcb->readonly && !is_subvol_readonly(subvol, Irp)) {
|
|
fcb->atts_changed = TRUE;
|
|
mark_fcb_dirty(fcb);
|
|
}
|
|
}
|
|
|
|
if (lastle)
|
|
InsertHeadList(lastle, &fcb->list_entry);
|
|
else
|
|
InsertTailList(&subvol->fcbs, &fcb->list_entry);
|
|
|
|
InsertTailList(&Vcb->all_fcbs, &fcb->list_entry_all);
|
|
|
|
fcb->Header.IsFastIoPossible = fast_io_possible(fcb);
|
|
|
|
*pfcb = fcb;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static NTSTATUS open_fcb_stream(_Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) device_extension* Vcb,
|
|
dir_child* dc, fcb* parent, fcb** pfcb, PIRP Irp) {
|
|
fcb* fcb;
|
|
UINT8* xattrdata;
|
|
UINT16 xattrlen, overhead;
|
|
NTSTATUS Status;
|
|
KEY searchkey;
|
|
traverse_ptr tp;
|
|
static char xapref[] = "user.";
|
|
ANSI_STRING xattr;
|
|
UINT32 crc32;
|
|
|
|
xattr.Length = (UINT16)strlen(xapref) + dc->utf8.Length;
|
|
xattr.MaximumLength = xattr.Length + 1;
|
|
xattr.Buffer = ExAllocatePoolWithTag(PagedPool, xattr.MaximumLength, ALLOC_TAG);
|
|
if (!xattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(xattr.Buffer, xapref, strlen(xapref));
|
|
RtlCopyMemory(&xattr.Buffer[strlen(xapref)], dc->utf8.Buffer, dc->utf8.Length);
|
|
xattr.Buffer[xattr.Length] = 0;
|
|
|
|
fcb = create_fcb(Vcb, PagedPool);
|
|
if (!fcb) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(xattr.Buffer);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fcb->Vcb = Vcb;
|
|
|
|
crc32 = calc_crc32c(0xfffffffe, (UINT8*)xattr.Buffer, xattr.Length);
|
|
|
|
if (!get_xattr(Vcb, parent->subvol, parent->inode, xattr.Buffer, crc32, &xattrdata, &xattrlen, Irp)) {
|
|
ERR("get_xattr failed\n");
|
|
free_fcb(Vcb, fcb);
|
|
ExFreePool(xattr.Buffer);
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
fcb->subvol = parent->subvol;
|
|
fcb->inode = parent->inode;
|
|
fcb->type = parent->type;
|
|
fcb->ads = TRUE;
|
|
fcb->adshash = crc32;
|
|
fcb->adsxattr = xattr;
|
|
|
|
// find XATTR_ITEM overhead and hence calculate maximum length
|
|
|
|
searchkey.obj_id = parent->inode;
|
|
searchkey.obj_type = TYPE_XATTR_ITEM;
|
|
searchkey.offset = crc32;
|
|
|
|
Status = find_item(Vcb, parent->subvol, &tp, &searchkey, FALSE, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("find_item returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
if (keycmp(tp.item->key, searchkey)) {
|
|
ERR("error - could not find key for xattr\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (tp.item->size < xattrlen) {
|
|
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, xattrlen);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
overhead = tp.item->size - xattrlen;
|
|
|
|
fcb->adsmaxlen = Vcb->superblock.node_size - sizeof(tree_header) - sizeof(leaf_node) - overhead;
|
|
|
|
fcb->adsdata.Buffer = (char*)xattrdata;
|
|
fcb->adsdata.Length = fcb->adsdata.MaximumLength = xattrlen;
|
|
|
|
fcb->Header.IsFastIoPossible = fast_io_possible(fcb);
|
|
fcb->Header.AllocationSize.QuadPart = xattrlen;
|
|
fcb->Header.FileSize.QuadPart = xattrlen;
|
|
fcb->Header.ValidDataLength.QuadPart = xattrlen;
|
|
|
|
TRACE("stream found: size = %x, hash = %08x\n", xattrlen, fcb->adshash);
|
|
|
|
InsertHeadList(&parent->list_entry, &fcb->list_entry);
|
|
|
|
InsertTailList(&Vcb->all_fcbs, &fcb->list_entry_all);
|
|
|
|
*pfcb = fcb;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS open_fileref_child(_Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) _In_ device_extension* Vcb,
|
|
_In_ file_ref* sf, _In_ PUNICODE_STRING name, _In_ BOOL case_sensitive, _In_ BOOL lastpart, _In_ BOOL streampart,
|
|
_In_ POOL_TYPE pooltype, _Out_ file_ref** psf2, _In_opt_ PIRP Irp) {
|
|
NTSTATUS Status;
|
|
file_ref* sf2;
|
|
|
|
if (sf->fcb == Vcb->dummy_fcb)
|
|
return STATUS_OBJECT_NAME_NOT_FOUND;
|
|
|
|
if (streampart) {
|
|
BOOL locked = FALSE;
|
|
LIST_ENTRY* le;
|
|
UNICODE_STRING name_uc;
|
|
dir_child* dc = NULL;
|
|
fcb* fcb;
|
|
|
|
if (!case_sensitive) {
|
|
Status = RtlUpcaseUnicodeString(&name_uc, name, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if (!ExIsResourceAcquiredSharedLite(&sf->fcb->nonpaged->dir_children_lock)) {
|
|
ExAcquireResourceSharedLite(&sf->fcb->nonpaged->dir_children_lock, TRUE);
|
|
locked = TRUE;
|
|
}
|
|
|
|
le = sf->fcb->dir_children_index.Flink;
|
|
while (le != &sf->fcb->dir_children_index) {
|
|
dir_child* dc2 = CONTAINING_RECORD(le, dir_child, list_entry_index);
|
|
|
|
if (dc2->index == 0) {
|
|
if ((case_sensitive && dc2->name.Length == name->Length && RtlCompareMemory(dc2->name.Buffer, name->Buffer, dc2->name.Length) == dc2->name.Length) ||
|
|
(!case_sensitive && dc2->name_uc.Length == name_uc.Length && RtlCompareMemory(dc2->name_uc.Buffer, name_uc.Buffer, dc2->name_uc.Length) == dc2->name_uc.Length)
|
|
) {
|
|
dc = dc2;
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
|
|
le = le->Flink;
|
|
}
|
|
|
|
if (!case_sensitive)
|
|
ExFreePool(name_uc.Buffer);
|
|
|
|
if (locked)
|
|
ExReleaseResourceLite(&sf->fcb->nonpaged->dir_children_lock);
|
|
|
|
if (!dc)
|
|
return STATUS_OBJECT_NAME_NOT_FOUND;
|
|
|
|
if (dc->fileref) {
|
|
increase_fileref_refcount(dc->fileref);
|
|
*psf2 = dc->fileref;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
Status = open_fcb_stream(Vcb, dc, sf->fcb, &fcb, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("open_fcb_stream returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
|
|
sf2 = create_fileref(Vcb);
|
|
if (!sf2) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
sf2->fcb = fcb;
|
|
|
|
sf2->parent = (struct _file_ref*)sf;
|
|
|
|
sf2->dc = dc;
|
|
dc->fileref = sf2;
|
|
|
|
ExAcquireResourceExclusiveLite(&sf->nonpaged->children_lock, TRUE);
|
|
InsertTailList(&sf->children, &sf2->list_entry);
|
|
ExReleaseResourceLite(&sf->nonpaged->children_lock);
|
|
|
|
increase_fileref_refcount(sf);
|
|
} else {
|
|
root* subvol;
|
|
UINT64 inode;
|
|
dir_child* dc;
|
|
|
|
Status = find_file_in_dir(name, sf->fcb, &subvol, &inode, &dc, case_sensitive);
|
|
if (Status == STATUS_OBJECT_NAME_NOT_FOUND) {
|
|
TRACE("could not find %.*S\n", name->Length / sizeof(WCHAR), name->Buffer);
|
|
|
|
return lastpart ? STATUS_OBJECT_NAME_NOT_FOUND : STATUS_OBJECT_PATH_NOT_FOUND;
|
|
} else if (!NT_SUCCESS(Status)) {
|
|
ERR("find_file_in_dir returned %08x\n", Status);
|
|
return Status;
|
|
} else {
|
|
fcb* fcb;
|
|
#ifdef DEBUG_STATS
|
|
LARGE_INTEGER time1, time2;
|
|
#endif
|
|
|
|
if (dc->fileref) {
|
|
if (!lastpart && dc->type != BTRFS_TYPE_DIRECTORY) {
|
|
TRACE("passed path including file as subdirectory\n");
|
|
return STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
InterlockedIncrement(&dc->fileref->refcount);
|
|
*psf2 = dc->fileref;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
if (!subvol || (subvol != Vcb->root_fileref->fcb->subvol && inode == SUBVOL_ROOT_INODE && subvol->parent != sf->fcb->subvol->id)) {
|
|
fcb = Vcb->dummy_fcb;
|
|
InterlockedIncrement(&fcb->refcount);
|
|
} else {
|
|
#ifdef DEBUG_STATS
|
|
time1 = KeQueryPerformanceCounter(NULL);
|
|
#endif
|
|
Status = open_fcb(Vcb, subvol, inode, dc->type, &dc->utf8, sf->fcb, &fcb, pooltype, Irp);
|
|
#ifdef DEBUG_STATS
|
|
time2 = KeQueryPerformanceCounter(NULL);
|
|
Vcb->stats.open_fcb_calls++;
|
|
Vcb->stats.open_fcb_time += time2.QuadPart - time1.QuadPart;
|
|
#endif
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("open_fcb returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if (dc->type != BTRFS_TYPE_DIRECTORY && !lastpart && !(fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT)) {
|
|
TRACE("passed path including file as subdirectory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
sf2 = create_fileref(Vcb);
|
|
if (!sf2) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
sf2->fcb = fcb;
|
|
|
|
if (dc->type == BTRFS_TYPE_DIRECTORY)
|
|
fcb->fileref = sf2;
|
|
|
|
sf2->dc = dc;
|
|
dc->fileref = sf2;
|
|
|
|
sf2->parent = (struct _file_ref*)sf;
|
|
|
|
ExAcquireResourceExclusiveLite(&sf->nonpaged->children_lock, TRUE);
|
|
InsertTailList(&sf->children, &sf2->list_entry);
|
|
ExReleaseResourceLite(&sf->nonpaged->children_lock);
|
|
|
|
increase_fileref_refcount(sf);
|
|
}
|
|
}
|
|
|
|
*psf2 = sf2;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS open_fileref(_Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) _In_ device_extension* Vcb, _Out_ file_ref** pfr,
|
|
_In_ PUNICODE_STRING fnus, _In_opt_ file_ref* related, _In_ BOOL parent, _Out_opt_ USHORT* parsed, _Out_opt_ ULONG* fn_offset, _In_ POOL_TYPE pooltype,
|
|
_In_ BOOL case_sensitive, _In_opt_ PIRP Irp) {
|
|
UNICODE_STRING fnus2;
|
|
file_ref *dir, *sf, *sf2;
|
|
LIST_ENTRY parts;
|
|
BOOL has_stream;
|
|
NTSTATUS Status;
|
|
LIST_ENTRY* le;
|
|
|
|
TRACE("(%p, %p, %p, %u, %p)\n", Vcb, pfr, related, parent, parsed);
|
|
|
|
#ifdef DEBUG
|
|
if (!ExIsResourceAcquiredExclusiveLite(&Vcb->fcb_lock) && !ExIsResourceAcquiredExclusiveLite(&Vcb->tree_lock)) {
|
|
ERR("fcb_lock not acquired exclusively\n");
|
|
int3;
|
|
}
|
|
#endif
|
|
|
|
if (Vcb->removing || Vcb->locked)
|
|
return STATUS_ACCESS_DENIED;
|
|
|
|
fnus2 = *fnus;
|
|
|
|
if (fnus2.Length < sizeof(WCHAR) && !related) {
|
|
ERR("error - fnus was too short\n");
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
if (related && fnus->Length == 0) {
|
|
increase_fileref_refcount(related);
|
|
|
|
*pfr = related;
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
if (related) {
|
|
dir = related;
|
|
} else {
|
|
if (fnus2.Buffer[0] != '\\') {
|
|
ERR("error - filename %.*S did not begin with \\\n", fnus2.Length / sizeof(WCHAR), fnus2.Buffer);
|
|
return STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
// if path starts with two backslashes, ignore one of them
|
|
if (fnus2.Length >= 2 * sizeof(WCHAR) && fnus2.Buffer[1] == '\\') {
|
|
fnus2.Buffer++;
|
|
fnus2.Length -= sizeof(WCHAR);
|
|
fnus2.MaximumLength -= sizeof(WCHAR);
|
|
}
|
|
|
|
if (fnus2.Length == sizeof(WCHAR)) {
|
|
if (Vcb->root_fileref->open_count == 0 && !(Vcb->Vpb->Flags & VPB_MOUNTED)) // don't allow root to be opened on unmounted FS
|
|
return STATUS_DEVICE_NOT_READY;
|
|
|
|
increase_fileref_refcount(Vcb->root_fileref);
|
|
*pfr = Vcb->root_fileref;
|
|
|
|
if (fn_offset)
|
|
*fn_offset = 0;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
dir = Vcb->root_fileref;
|
|
|
|
fnus2.Buffer++;
|
|
fnus2.Length -= sizeof(WCHAR);
|
|
fnus2.MaximumLength -= sizeof(WCHAR);
|
|
}
|
|
|
|
if (dir->fcb->type != BTRFS_TYPE_DIRECTORY && (fnus->Length < sizeof(WCHAR) || fnus->Buffer[0] != ':')) {
|
|
WARN("passed related fileref which isn't a directory (%S) (fnus = %.*S)\n",
|
|
file_desc_fileref(related), fnus->Length / sizeof(WCHAR), fnus->Buffer);
|
|
return STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
InitializeListHead(&parts);
|
|
|
|
if (fnus->Length != 0 &&
|
|
(fnus->Length != wcslen(datastring) * sizeof(WCHAR) || RtlCompareMemory(fnus->Buffer, datastring, wcslen(datastring) * sizeof(WCHAR)) != wcslen(datastring) * sizeof(WCHAR))) {
|
|
Status = split_path(Vcb, &fnus2, &parts, &has_stream);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("split_path returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
sf = dir;
|
|
increase_fileref_refcount(dir);
|
|
|
|
if (parent && !IsListEmpty(&parts)) {
|
|
name_bit* nb;
|
|
|
|
nb = CONTAINING_RECORD(RemoveTailList(&parts), name_bit, list_entry);
|
|
ExFreePool(nb);
|
|
|
|
if (has_stream && !IsListEmpty(&parts)) {
|
|
nb = CONTAINING_RECORD(RemoveTailList(&parts), name_bit, list_entry);
|
|
ExFreePool(nb);
|
|
|
|
has_stream = FALSE;
|
|
}
|
|
}
|
|
|
|
if (IsListEmpty(&parts)) {
|
|
Status = STATUS_SUCCESS;
|
|
*pfr = dir;
|
|
|
|
if (fn_offset)
|
|
*fn_offset = 0;
|
|
|
|
goto end2;
|
|
}
|
|
|
|
le = parts.Flink;
|
|
do {
|
|
name_bit* nb = CONTAINING_RECORD(le, name_bit, list_entry);
|
|
BOOL lastpart = le->Flink == &parts || (has_stream && le->Flink->Flink == &parts);
|
|
BOOL streampart = has_stream && le->Flink == &parts;
|
|
#ifdef DEBUG_STATS
|
|
LARGE_INTEGER time1, time2;
|
|
#endif
|
|
|
|
#ifdef DEBUG_STATS
|
|
time1 = KeQueryPerformanceCounter(NULL);
|
|
#endif
|
|
Status = open_fileref_child(Vcb, sf, &nb->us, case_sensitive, lastpart, streampart, pooltype, &sf2, Irp);
|
|
#ifdef DEBUG_STATS
|
|
time2 = KeQueryPerformanceCounter(NULL);
|
|
Vcb->stats.open_fileref_child_calls++;
|
|
Vcb->stats.open_fileref_child_time += time2.QuadPart - time1.QuadPart;
|
|
#endif
|
|
if (!NT_SUCCESS(Status)) {
|
|
if (Status == STATUS_OBJECT_PATH_NOT_FOUND || Status == STATUS_OBJECT_NAME_NOT_FOUND)
|
|
TRACE("open_fileref_child returned %08x\n", Status);
|
|
else
|
|
ERR("open_fileref_child returned %08x\n", Status);
|
|
|
|
goto end;
|
|
}
|
|
|
|
if (le->Flink == &parts) { // last entry
|
|
if (fn_offset) {
|
|
if (has_stream)
|
|
nb = CONTAINING_RECORD(le->Blink, name_bit, list_entry);
|
|
|
|
*fn_offset = (ULONG)(nb->us.Buffer - fnus->Buffer);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if (sf2->fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT) {
|
|
Status = STATUS_REPARSE;
|
|
|
|
if (parsed) {
|
|
name_bit* nb2 = CONTAINING_RECORD(le->Flink, name_bit, list_entry);
|
|
|
|
*parsed = (USHORT)(nb2->us.Buffer - fnus->Buffer - 1) * sizeof(WCHAR);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
free_fileref(Vcb, sf);
|
|
sf = sf2;
|
|
|
|
le = le->Flink;
|
|
} while (le != &parts);
|
|
|
|
if (Status != STATUS_REPARSE)
|
|
Status = STATUS_SUCCESS;
|
|
*pfr = sf2;
|
|
|
|
end:
|
|
free_fileref(Vcb, sf);
|
|
|
|
while (!IsListEmpty(&parts)) {
|
|
name_bit* nb = CONTAINING_RECORD(RemoveHeadList(&parts), name_bit, list_entry);
|
|
ExFreeToPagedLookasideList(&Vcb->name_bit_lookaside, nb);
|
|
}
|
|
|
|
end2:
|
|
TRACE("returning %08x\n", Status);
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS add_dir_child(fcb* fcb, UINT64 inode, BOOL subvol, PANSI_STRING utf8, PUNICODE_STRING name, UINT8 type, dir_child** pdc) {
|
|
NTSTATUS Status;
|
|
dir_child* dc;
|
|
|
|
dc = ExAllocatePoolWithTag(PagedPool, sizeof(dir_child), ALLOC_TAG);
|
|
if (!dc) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, utf8->Length, ALLOC_TAG);
|
|
if (!dc->utf8.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
dc->name.Buffer = ExAllocatePoolWithTag(PagedPool, name->Length, ALLOC_TAG);
|
|
if (!dc->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
dc->key.obj_id = inode;
|
|
dc->key.obj_type = subvol ? TYPE_ROOT_ITEM : TYPE_INODE_ITEM;
|
|
dc->key.offset = subvol ? 0xffffffffffffffff : 0;
|
|
dc->type = type;
|
|
dc->fileref = NULL;
|
|
|
|
dc->utf8.Length = dc->utf8.MaximumLength = utf8->Length;
|
|
RtlCopyMemory(dc->utf8.Buffer, utf8->Buffer, utf8->Length);
|
|
|
|
dc->name.Length = dc->name.MaximumLength = name->Length;
|
|
RtlCopyMemory(dc->name.Buffer, name->Buffer, name->Length);
|
|
|
|
Status = RtlUpcaseUnicodeString(&dc->name_uc, name, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
return Status;
|
|
}
|
|
|
|
dc->hash = calc_crc32c(0xffffffff, (UINT8*)dc->name.Buffer, dc->name.Length);
|
|
dc->hash_uc = calc_crc32c(0xffffffff, (UINT8*)dc->name_uc.Buffer, dc->name_uc.Length);
|
|
|
|
ExAcquireResourceExclusiveLite(&fcb->nonpaged->dir_children_lock, TRUE);
|
|
|
|
if (IsListEmpty(&fcb->dir_children_index))
|
|
dc->index = 2;
|
|
else {
|
|
dir_child* dc2 = CONTAINING_RECORD(fcb->dir_children_index.Blink, dir_child, list_entry_index);
|
|
|
|
dc->index = max(2, dc2->index + 1);
|
|
}
|
|
|
|
InsertTailList(&fcb->dir_children_index, &dc->list_entry_index);
|
|
|
|
insert_dir_child_into_hash_lists(fcb, dc);
|
|
|
|
ExReleaseResourceLite(&fcb->nonpaged->dir_children_lock);
|
|
|
|
*pdc = dc;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
UINT32 inherit_mode(fcb* parfcb, BOOL is_dir) {
|
|
UINT32 mode;
|
|
|
|
if (!parfcb)
|
|
return 0755;
|
|
|
|
mode = parfcb->inode_item.st_mode & ~S_IFDIR;
|
|
mode &= ~S_ISVTX; // clear sticky bit
|
|
mode &= ~S_ISUID; // clear setuid bit
|
|
|
|
if (!is_dir)
|
|
mode &= ~S_ISGID; // if not directory, clear setgid bit
|
|
|
|
return mode;
|
|
}
|
|
|
|
static NTSTATUS file_create2(_In_ PIRP Irp, _Requires_exclusive_lock_held_(_Curr_->fcb_lock) _In_ device_extension* Vcb, _In_ PUNICODE_STRING fpus,
|
|
_In_ file_ref* parfileref, _In_ ULONG options, _In_reads_bytes_opt_(ealen) FILE_FULL_EA_INFORMATION* ea, _In_ ULONG ealen,
|
|
_Out_ file_ref** pfr, _In_ LIST_ENTRY* rollback) {
|
|
NTSTATUS Status;
|
|
fcb* fcb;
|
|
ULONG utf8len;
|
|
char* utf8 = NULL;
|
|
UINT64 inode;
|
|
UINT8 type;
|
|
LARGE_INTEGER time;
|
|
BTRFS_TIME now;
|
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
POOL_TYPE pool_type = IrpSp->Flags & SL_OPEN_PAGING_FILE ? NonPagedPool : PagedPool;
|
|
USHORT defda;
|
|
file_ref* fileref;
|
|
dir_child* dc;
|
|
ANSI_STRING utf8as;
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG rc;
|
|
#endif
|
|
|
|
if (parfileref->fcb == Vcb->dummy_fcb)
|
|
return STATUS_ACCESS_DENIED;
|
|
|
|
if (options & FILE_DIRECTORY_FILE && IrpSp->Parameters.Create.FileAttributes & FILE_ATTRIBUTE_TEMPORARY)
|
|
return STATUS_INVALID_PARAMETER;
|
|
|
|
Status = RtlUnicodeToUTF8N(NULL, 0, &utf8len, fpus->Buffer, fpus->Length);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUnicodeToUTF8N returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
|
|
utf8 = ExAllocatePoolWithTag(pool_type, utf8len + 1, ALLOC_TAG);
|
|
if (!utf8) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlUnicodeToUTF8N(utf8, utf8len, &utf8len, fpus->Buffer, fpus->Length);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUnicodeToUTF8N returned %08x\n", Status);
|
|
ExFreePool(utf8);
|
|
return Status;
|
|
}
|
|
|
|
utf8[utf8len] = 0;
|
|
|
|
KeQuerySystemTime(&time);
|
|
win_time_to_unix(time, &now);
|
|
|
|
TRACE("create file %.*S\n", fpus->Length / sizeof(WCHAR), fpus->Buffer);
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
TRACE("parfileref->fcb->inode_item.st_size (inode %llx) was %llx\n", parfileref->fcb->inode, parfileref->fcb->inode_item.st_size);
|
|
parfileref->fcb->inode_item.st_size += utf8len * 2;
|
|
TRACE("parfileref->fcb->inode_item.st_size (inode %llx) now %llx\n", parfileref->fcb->inode, parfileref->fcb->inode_item.st_size);
|
|
parfileref->fcb->inode_item.transid = Vcb->superblock.generation;
|
|
parfileref->fcb->inode_item.sequence++;
|
|
parfileref->fcb->inode_item.st_ctime = now;
|
|
parfileref->fcb->inode_item.st_mtime = now;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
parfileref->fcb->inode_item_changed = TRUE;
|
|
mark_fcb_dirty(parfileref->fcb);
|
|
|
|
inode = InterlockedIncrement64(&parfileref->fcb->subvol->lastinode);
|
|
|
|
type = options & FILE_DIRECTORY_FILE ? BTRFS_TYPE_DIRECTORY : BTRFS_TYPE_FILE;
|
|
|
|
// FIXME - link FILE_ATTRIBUTE_READONLY to st_mode
|
|
|
|
TRACE("requested attributes = %x\n", IrpSp->Parameters.Create.FileAttributes);
|
|
|
|
defda = 0;
|
|
|
|
if (utf8[0] == '.')
|
|
defda |= FILE_ATTRIBUTE_HIDDEN;
|
|
|
|
if (options & FILE_DIRECTORY_FILE) {
|
|
defda |= FILE_ATTRIBUTE_DIRECTORY;
|
|
IrpSp->Parameters.Create.FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
|
|
} else
|
|
IrpSp->Parameters.Create.FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
|
|
|
|
if (!(IrpSp->Parameters.Create.FileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
|
|
IrpSp->Parameters.Create.FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
|
|
defda |= FILE_ATTRIBUTE_ARCHIVE;
|
|
}
|
|
|
|
TRACE("defda = %x\n", defda);
|
|
|
|
if (IrpSp->Parameters.Create.FileAttributes == FILE_ATTRIBUTE_NORMAL)
|
|
IrpSp->Parameters.Create.FileAttributes = defda;
|
|
|
|
fcb = create_fcb(Vcb, pool_type);
|
|
if (!fcb) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(utf8);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fcb->Vcb = Vcb;
|
|
|
|
if (IrpSp->Flags & SL_OPEN_PAGING_FILE) {
|
|
fcb->Header.Flags2 |= FSRTL_FLAG2_IS_PAGING_FILE;
|
|
Vcb->disallow_dismount = TRUE;
|
|
}
|
|
|
|
fcb->inode_item.generation = Vcb->superblock.generation;
|
|
fcb->inode_item.transid = Vcb->superblock.generation;
|
|
fcb->inode_item.st_size = 0;
|
|
fcb->inode_item.st_blocks = 0;
|
|
fcb->inode_item.block_group = 0;
|
|
fcb->inode_item.st_nlink = 1;
|
|
fcb->inode_item.st_gid = GID_NOBODY; // FIXME?
|
|
fcb->inode_item.st_mode = inherit_mode(parfileref->fcb, type == BTRFS_TYPE_DIRECTORY); // use parent's permissions by default
|
|
fcb->inode_item.st_rdev = 0;
|
|
fcb->inode_item.flags = 0;
|
|
fcb->inode_item.sequence = 1;
|
|
fcb->inode_item.st_atime = now;
|
|
fcb->inode_item.st_ctime = now;
|
|
fcb->inode_item.st_mtime = now;
|
|
fcb->inode_item.otime = now;
|
|
|
|
if (type == BTRFS_TYPE_DIRECTORY)
|
|
fcb->inode_item.st_mode |= S_IFDIR;
|
|
else {
|
|
fcb->inode_item.st_mode |= S_IFREG;
|
|
fcb->inode_item.st_mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH); // remove executable bit if not directory
|
|
}
|
|
|
|
if (IrpSp->Flags & SL_OPEN_PAGING_FILE) {
|
|
fcb->inode_item.flags = BTRFS_INODE_NODATACOW | BTRFS_INODE_NODATASUM | BTRFS_INODE_NOCOMPRESS;
|
|
} else {
|
|
// inherit nodatacow flag from parent directory
|
|
if (parfileref->fcb->inode_item.flags & BTRFS_INODE_NODATACOW) {
|
|
fcb->inode_item.flags |= BTRFS_INODE_NODATACOW;
|
|
|
|
if (type != BTRFS_TYPE_DIRECTORY)
|
|
fcb->inode_item.flags |= BTRFS_INODE_NODATASUM;
|
|
}
|
|
|
|
if (parfileref->fcb->inode_item.flags & BTRFS_INODE_COMPRESS)
|
|
fcb->inode_item.flags |= BTRFS_INODE_COMPRESS;
|
|
}
|
|
|
|
fcb->prop_compression = parfileref->fcb->prop_compression;
|
|
fcb->prop_compression_changed = fcb->prop_compression != PropCompression_None;
|
|
|
|
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->atts = IrpSp->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL;
|
|
fcb->atts_changed = fcb->atts != defda;
|
|
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
rc = InterlockedIncrement(&parfileref->fcb->refcount);
|
|
WARN("fcb %p: refcount now %i (%S)\n", parfileref->fcb, rc, file_desc_fileref(parfileref));
|
|
#else
|
|
InterlockedIncrement(&parfileref->fcb->refcount);
|
|
#endif
|
|
fcb->subvol = parfileref->fcb->subvol;
|
|
fcb->inode = inode;
|
|
fcb->type = type;
|
|
fcb->created = TRUE;
|
|
fcb->deleted = TRUE;
|
|
|
|
mark_fcb_dirty(fcb);
|
|
|
|
Status = fcb_get_new_sd(fcb, parfileref, IrpSp->Parameters.Create.SecurityContext->AccessState);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("fcb_get_new_sd returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return Status;
|
|
}
|
|
|
|
fcb->sd_dirty = TRUE;
|
|
|
|
if (ea && ealen > 0) {
|
|
FILE_FULL_EA_INFORMATION* eainfo;
|
|
|
|
fcb->ealen = 4;
|
|
|
|
// capitalize EA names
|
|
eainfo = ea;
|
|
do {
|
|
STRING s;
|
|
|
|
s.Length = s.MaximumLength = eainfo->EaNameLength;
|
|
s.Buffer = eainfo->EaName;
|
|
|
|
RtlUpperString(&s, &s);
|
|
|
|
fcb->ealen += 5 + eainfo->EaNameLength + eainfo->EaValueLength;
|
|
|
|
if (eainfo->NextEntryOffset == 0)
|
|
break;
|
|
|
|
eainfo = (FILE_FULL_EA_INFORMATION*)(((UINT8*)eainfo) + eainfo->NextEntryOffset);
|
|
} while (TRUE);
|
|
|
|
fcb->ea_xattr.Buffer = ExAllocatePoolWithTag(pool_type, ealen, ALLOC_TAG);
|
|
if (!fcb->ea_xattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fcb->ea_xattr.Length = fcb->ea_xattr.MaximumLength = (UINT16)ealen;
|
|
RtlCopyMemory(fcb->ea_xattr.Buffer, ea, fcb->ea_xattr.Length);
|
|
|
|
fcb->ea_changed = TRUE;
|
|
}
|
|
|
|
fileref = create_fileref(Vcb);
|
|
if (!fileref) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fileref->fcb = fcb;
|
|
|
|
if (Irp->Overlay.AllocationSize.QuadPart > 0 && !write_fcb_compressed(fcb)) {
|
|
Status = extend_file(fcb, fileref, Irp->Overlay.AllocationSize.QuadPart, TRUE, NULL, rollback);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("extend_file returned %08x\n", Status);
|
|
free_fileref(Vcb, fileref);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if (fcb->type == BTRFS_TYPE_DIRECTORY) {
|
|
fcb->hash_ptrs = ExAllocatePoolWithTag(PagedPool, sizeof(LIST_ENTRY*) * 256, ALLOC_TAG);
|
|
if (!fcb->hash_ptrs) {
|
|
ERR("out of memory\n");
|
|
free_fileref(Vcb, fileref);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
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");
|
|
free_fileref(Vcb, fileref);
|
|
|
|
ExAcquireResourceExclusiveLite(parfileref->fcb->Header.Resource, TRUE);
|
|
parfileref->fcb->inode_item.st_size -= utf8len * 2;
|
|
ExReleaseResourceLite(parfileref->fcb->Header.Resource);
|
|
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlZeroMemory(fcb->hash_ptrs_uc, sizeof(LIST_ENTRY*) * 256);
|
|
}
|
|
|
|
fcb->deleted = FALSE;
|
|
|
|
fileref->created = TRUE;
|
|
mark_fileref_dirty(fileref);
|
|
|
|
fcb->subvol->root_item.ctransid = Vcb->superblock.generation;
|
|
fcb->subvol->root_item.ctime = now;
|
|
|
|
fileref->parent = parfileref;
|
|
|
|
utf8as.Buffer = utf8;
|
|
utf8as.Length = utf8as.MaximumLength = (UINT16)utf8len;
|
|
|
|
Status = add_dir_child(fileref->parent->fcb, fcb->inode, FALSE, &utf8as, fpus, fcb->type, &dc);
|
|
if (!NT_SUCCESS(Status))
|
|
WARN("add_dir_child returned %08x\n", Status);
|
|
|
|
ExFreePool(utf8);
|
|
|
|
fileref->dc = dc;
|
|
dc->fileref = fileref;
|
|
|
|
ExAcquireResourceExclusiveLite(&parfileref->nonpaged->children_lock, TRUE);
|
|
InsertTailList(&parfileref->children, &fileref->list_entry);
|
|
ExReleaseResourceLite(&parfileref->nonpaged->children_lock);
|
|
|
|
increase_fileref_refcount(parfileref);
|
|
|
|
InsertTailList(&fcb->subvol->fcbs, &fcb->list_entry);
|
|
InsertTailList(&Vcb->all_fcbs, &fcb->list_entry_all);
|
|
|
|
*pfr = fileref;
|
|
|
|
if (type == BTRFS_TYPE_DIRECTORY)
|
|
fileref->fcb->fileref = fileref;
|
|
|
|
TRACE("created new file %S in subvol %llx, inode %llx\n", file_desc_fileref(fileref), fcb->subvol->id, fcb->inode);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static NTSTATUS create_stream(_Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) device_extension* Vcb,
|
|
file_ref** pfileref, file_ref** pparfileref, PUNICODE_STRING fpus, PUNICODE_STRING stream, PIRP Irp,
|
|
ULONG options, POOL_TYPE pool_type, BOOL case_sensitive, LIST_ENTRY* rollback) {
|
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
file_ref *fileref, *newpar, *parfileref;
|
|
fcb* fcb;
|
|
static char xapref[] = "user.";
|
|
static WCHAR DOSATTRIB[] = L"DOSATTRIB";
|
|
static WCHAR EA[] = L"EA";
|
|
static WCHAR reparse[] = L"reparse";
|
|
UINT16 xapreflen = (UINT16)strlen(xapref);
|
|
LARGE_INTEGER time;
|
|
BTRFS_TIME now;
|
|
ULONG utf8len, overhead;
|
|
NTSTATUS Status;
|
|
KEY searchkey;
|
|
traverse_ptr tp;
|
|
dir_child* dc;
|
|
ACCESS_MASK granted_access;
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG rc;
|
|
#endif
|
|
|
|
TRACE("fpus = %.*S\n", fpus->Length / sizeof(WCHAR), fpus->Buffer);
|
|
TRACE("stream = %.*S\n", stream->Length / sizeof(WCHAR), stream->Buffer);
|
|
|
|
parfileref = *pparfileref;
|
|
|
|
if (parfileref->fcb == Vcb->dummy_fcb)
|
|
return STATUS_ACCESS_DENIED;
|
|
|
|
Status = open_fileref(Vcb, &newpar, fpus, parfileref, FALSE, NULL, NULL, PagedPool, case_sensitive, Irp);
|
|
|
|
if (Status == STATUS_OBJECT_NAME_NOT_FOUND) {
|
|
UNICODE_STRING fpus2;
|
|
|
|
if (!is_file_name_valid(fpus, FALSE))
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
|
|
fpus2.Length = fpus2.MaximumLength = fpus->Length;
|
|
fpus2.Buffer = ExAllocatePoolWithTag(pool_type, fpus2.MaximumLength, ALLOC_TAG);
|
|
|
|
if (!fpus2.Buffer) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(fpus2.Buffer, fpus->Buffer, fpus2.Length);
|
|
|
|
SeLockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if (!SeAccessCheck(parfileref->fcb->sd, &IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext,
|
|
TRUE, options & FILE_DIRECTORY_FILE ? FILE_ADD_SUBDIRECTORY : FILE_ADD_FILE, 0, NULL,
|
|
IoGetFileObjectGenericMapping(), IrpSp->Flags & SL_FORCE_ACCESS_CHECK ? UserMode : Irp->RequestorMode,
|
|
&granted_access, &Status)) {
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
return Status;
|
|
}
|
|
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
Status = file_create2(Irp, Vcb, &fpus2, parfileref, options, NULL, 0, &newpar, rollback);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("file_create2 returned %08x\n", Status);
|
|
ExFreePool(fpus2.Buffer);
|
|
return Status;
|
|
}
|
|
|
|
send_notification_fileref(newpar, options & FILE_DIRECTORY_FILE ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED, NULL);
|
|
send_notification_fcb(newpar->parent, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
|
|
} else if (!NT_SUCCESS(Status)) {
|
|
ERR("open_fileref returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
|
|
parfileref = newpar;
|
|
*pparfileref = parfileref;
|
|
|
|
if (parfileref->fcb->type != BTRFS_TYPE_FILE && parfileref->fcb->type != BTRFS_TYPE_SYMLINK && parfileref->fcb->type != BTRFS_TYPE_DIRECTORY) {
|
|
WARN("parent not file, directory, or symlink\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (options & FILE_DIRECTORY_FILE) {
|
|
WARN("tried to create directory as stream\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (parfileref->fcb->atts & FILE_ATTRIBUTE_READONLY)
|
|
return STATUS_ACCESS_DENIED;
|
|
|
|
SeLockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if (!SeAccessCheck(parfileref->fcb->sd, &IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext,
|
|
TRUE, FILE_WRITE_DATA, 0, NULL, IoGetFileObjectGenericMapping(), IrpSp->Flags & SL_FORCE_ACCESS_CHECK ? UserMode : Irp->RequestorMode,
|
|
&granted_access, &Status)) {
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
return Status;
|
|
}
|
|
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if ((stream->Length == wcslen(DOSATTRIB) * sizeof(WCHAR) && RtlCompareMemory(stream->Buffer, DOSATTRIB, stream->Length) == stream->Length) ||
|
|
(stream->Length == wcslen(EA) * sizeof(WCHAR) && RtlCompareMemory(stream->Buffer, EA, stream->Length) == stream->Length) ||
|
|
(stream->Length == wcslen(reparse) * sizeof(WCHAR) && RtlCompareMemory(stream->Buffer, reparse, stream->Length) == stream->Length)) {
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
|
|
fcb = create_fcb(Vcb, pool_type);
|
|
if (!fcb) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fcb->Vcb = Vcb;
|
|
|
|
fcb->Header.IsFastIoPossible = fast_io_possible(fcb);
|
|
fcb->Header.AllocationSize.QuadPart = 0;
|
|
fcb->Header.FileSize.QuadPart = 0;
|
|
fcb->Header.ValidDataLength.QuadPart = 0;
|
|
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
rc = InterlockedIncrement(&parfileref->fcb->refcount);
|
|
WARN("fcb %p: refcount now %i (%S)\n", parfileref->fcb, rc, file_desc_fileref(parfileref));
|
|
#else
|
|
InterlockedIncrement(&parfileref->fcb->refcount);
|
|
#endif
|
|
fcb->subvol = parfileref->fcb->subvol;
|
|
fcb->inode = parfileref->fcb->inode;
|
|
fcb->type = parfileref->fcb->type;
|
|
|
|
fcb->ads = TRUE;
|
|
|
|
Status = RtlUnicodeToUTF8N(NULL, 0, &utf8len, stream->Buffer, stream->Length);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUnicodeToUTF8N 1 returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
fcb->adsxattr.Length = (UINT16)utf8len + xapreflen;
|
|
fcb->adsxattr.MaximumLength = fcb->adsxattr.Length + 1;
|
|
fcb->adsxattr.Buffer = ExAllocatePoolWithTag(pool_type, fcb->adsxattr.MaximumLength, ALLOC_TAG);
|
|
if (!fcb->adsxattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(fcb->adsxattr.Buffer, xapref, xapreflen);
|
|
|
|
Status = RtlUnicodeToUTF8N(&fcb->adsxattr.Buffer[xapreflen], utf8len, &utf8len, stream->Buffer, stream->Length);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUnicodeToUTF8N 2 returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
fcb->adsxattr.Buffer[fcb->adsxattr.Length] = 0;
|
|
|
|
TRACE("adsxattr = %s\n", fcb->adsxattr.Buffer);
|
|
|
|
fcb->adshash = calc_crc32c(0xfffffffe, (UINT8*)fcb->adsxattr.Buffer, fcb->adsxattr.Length);
|
|
TRACE("adshash = %08x\n", fcb->adshash);
|
|
|
|
searchkey.obj_id = parfileref->fcb->inode;
|
|
searchkey.obj_type = TYPE_XATTR_ITEM;
|
|
searchkey.offset = fcb->adshash;
|
|
|
|
Status = find_item(Vcb, parfileref->fcb->subvol, &tp, &searchkey, FALSE, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("find_item returned %08x\n", Status);
|
|
free_fcb(Vcb, fcb);
|
|
return Status;
|
|
}
|
|
|
|
if (!keycmp(tp.item->key, searchkey))
|
|
overhead = tp.item->size;
|
|
else
|
|
overhead = 0;
|
|
|
|
fcb->adsmaxlen = Vcb->superblock.node_size - sizeof(tree_header) - sizeof(leaf_node) - (sizeof(DIR_ITEM) - 1);
|
|
|
|
if (utf8len + xapreflen + overhead > fcb->adsmaxlen) {
|
|
WARN("not enough room for new DIR_ITEM (%u + %u > %u)", utf8len + xapreflen, overhead, fcb->adsmaxlen);
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_DISK_FULL;
|
|
} else
|
|
fcb->adsmaxlen -= overhead + utf8len + xapreflen;
|
|
|
|
fileref = create_fileref(Vcb);
|
|
if (!fileref) {
|
|
ERR("out of memory\n");
|
|
free_fcb(Vcb, fcb);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
fileref->fcb = fcb;
|
|
|
|
dc = ExAllocatePoolWithTag(PagedPool, sizeof(dir_child), ALLOC_TAG);
|
|
if (!dc) {
|
|
ERR("out of memory\n");
|
|
free_fileref(Vcb, fileref);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlZeroMemory(dc, sizeof(dir_child));
|
|
|
|
dc->utf8.MaximumLength = dc->utf8.Length = fcb->adsxattr.Length - xapreflen;
|
|
dc->utf8.Buffer = ExAllocatePoolWithTag(PagedPool, dc->utf8.MaximumLength, ALLOC_TAG);
|
|
if (!dc->utf8.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc);
|
|
free_fileref(Vcb, fileref);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(dc->utf8.Buffer, &fcb->adsxattr.Buffer[xapreflen], fcb->adsxattr.Length - xapreflen);
|
|
|
|
dc->name.MaximumLength = dc->name.Length = stream->Length;
|
|
dc->name.Buffer = ExAllocatePoolWithTag(pool_type, dc->name.MaximumLength, ALLOC_TAG);
|
|
if (!dc->name.Buffer) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc);
|
|
free_fileref(Vcb, fileref);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(dc->name.Buffer, stream->Buffer, stream->Length);
|
|
|
|
Status = RtlUpcaseUnicodeString(&dc->name_uc, &dc->name, TRUE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUpcaseUnicodeString returned %08x\n", Status);
|
|
ExFreePool(dc->utf8.Buffer);
|
|
ExFreePool(dc->name.Buffer);
|
|
ExFreePool(dc);
|
|
free_fileref(Vcb, fileref);
|
|
return Status;
|
|
}
|
|
|
|
dc->fileref = fileref;
|
|
fileref->dc = dc;
|
|
|
|
InsertHeadList(&parfileref->fcb->dir_children_index, &dc->list_entry_index);
|
|
|
|
mark_fcb_dirty(fcb);
|
|
mark_fileref_dirty(fileref);
|
|
|
|
InsertHeadList(&parfileref->fcb->list_entry, &fcb->list_entry); // insert in list after parent fcb
|
|
InsertTailList(&Vcb->all_fcbs, &fcb->list_entry_all);
|
|
|
|
KeQuerySystemTime(&time);
|
|
win_time_to_unix(time, &now);
|
|
|
|
parfileref->fcb->inode_item.transid = Vcb->superblock.generation;
|
|
parfileref->fcb->inode_item.sequence++;
|
|
parfileref->fcb->inode_item.st_ctime = now;
|
|
parfileref->fcb->inode_item_changed = TRUE;
|
|
|
|
mark_fcb_dirty(parfileref->fcb);
|
|
|
|
parfileref->fcb->subvol->root_item.ctransid = Vcb->superblock.generation;
|
|
parfileref->fcb->subvol->root_item.ctime = now;
|
|
|
|
fileref->parent = (struct _file_ref*)parfileref;
|
|
|
|
ExAcquireResourceExclusiveLite(&parfileref->nonpaged->children_lock, TRUE);
|
|
InsertTailList(&parfileref->children, &fileref->list_entry);
|
|
ExReleaseResourceLite(&parfileref->nonpaged->children_lock);
|
|
|
|
increase_fileref_refcount(parfileref);
|
|
|
|
*pfileref = fileref;
|
|
|
|
send_notification_fileref(parfileref, FILE_NOTIFY_CHANGE_STREAM_NAME, FILE_ACTION_ADDED_STREAM, &fileref->dc->name);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
// LXSS programs can be distinguished by the fact they have a NULL PEB.
|
|
#ifdef _AMD64_
|
|
#ifdef __REACTOS__
|
|
NTSYSAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
ZwQueryInformationProcess (
|
|
_In_ HANDLE ProcessHandle,
|
|
_In_ PROCESSINFOCLASS ProcessInformationClass,
|
|
_Out_ PVOID ProcessInformation,
|
|
_In_ ULONG ProcessInformationLength,
|
|
_Out_opt_ PULONG ReturnLength
|
|
);
|
|
#endif
|
|
static __inline BOOL called_from_lxss() {
|
|
NTSTATUS Status;
|
|
PROCESS_BASIC_INFORMATION pbi;
|
|
ULONG retlen;
|
|
|
|
Status = ZwQueryInformationProcess(NtCurrentProcess(), ProcessBasicInformation, &pbi, sizeof(pbi), &retlen);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("ZwQueryInformationProcess returned %08x\n", Status);
|
|
return FALSE;
|
|
}
|
|
|
|
return !pbi.PebBaseAddress;
|
|
}
|
|
#else
|
|
#define called_from_lxss() FALSE
|
|
#endif
|
|
|
|
static NTSTATUS file_create(PIRP Irp, _Requires_lock_held_(_Curr_->tree_lock) _Requires_exclusive_lock_held_(_Curr_->fcb_lock) device_extension* Vcb,
|
|
PFILE_OBJECT FileObject, file_ref* related, BOOL loaded_related, PUNICODE_STRING fnus, ULONG disposition, ULONG options, LIST_ENTRY* rollback) {
|
|
NTSTATUS Status;
|
|
file_ref *fileref, *parfileref = NULL;
|
|
ULONG i, j;
|
|
ccb* ccb;
|
|
static WCHAR datasuf[] = {':','$','D','A','T','A',0};
|
|
UNICODE_STRING dsus, fpus, stream;
|
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
POOL_TYPE pool_type = IrpSp->Flags & SL_OPEN_PAGING_FILE ? NonPagedPool : PagedPool;
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG oc;
|
|
#endif
|
|
|
|
TRACE("(%p, %p, %p, %.*S, %x, %x)\n", Irp, Vcb, FileObject, fnus->Length / sizeof(WCHAR), fnus->Buffer, disposition, options);
|
|
|
|
if (Vcb->readonly)
|
|
return STATUS_MEDIA_WRITE_PROTECTED;
|
|
|
|
if (options & FILE_DELETE_ON_CLOSE && IrpSp->Parameters.Create.FileAttributes & FILE_ATTRIBUTE_READONLY)
|
|
return STATUS_CANNOT_DELETE;
|
|
|
|
dsus.Buffer = datasuf;
|
|
dsus.Length = dsus.MaximumLength = (USHORT)wcslen(datasuf) * sizeof(WCHAR);
|
|
fpus.Buffer = NULL;
|
|
|
|
if (!loaded_related) {
|
|
Status = open_fileref(Vcb, &parfileref, fnus, related, TRUE, NULL, NULL, pool_type, IrpSp->Flags & SL_CASE_SENSITIVE, Irp);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
goto end;
|
|
} else
|
|
parfileref = related;
|
|
|
|
if (parfileref->fcb->type != BTRFS_TYPE_DIRECTORY && (fnus->Length < sizeof(WCHAR) || fnus->Buffer[0] != ':')) {
|
|
Status = STATUS_OBJECT_PATH_NOT_FOUND;
|
|
goto end;
|
|
}
|
|
|
|
if (is_subvol_readonly(parfileref->fcb->subvol, Irp)) {
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto end;
|
|
}
|
|
|
|
i = (fnus->Length / sizeof(WCHAR))-1;
|
|
while ((fnus->Buffer[i] == '\\' || fnus->Buffer[i] == '/') && i > 0) { i--; }
|
|
|
|
j = i;
|
|
|
|
while (i > 0 && fnus->Buffer[i-1] != '\\' && fnus->Buffer[i-1] != '/') { i--; }
|
|
|
|
fpus.MaximumLength = (USHORT)((j - i + 2) * sizeof(WCHAR));
|
|
fpus.Buffer = ExAllocatePoolWithTag(pool_type, fpus.MaximumLength, ALLOC_TAG);
|
|
if (!fpus.Buffer) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto end;
|
|
}
|
|
|
|
fpus.Length = (USHORT)((j - i + 1) * sizeof(WCHAR));
|
|
|
|
RtlCopyMemory(fpus.Buffer, &fnus->Buffer[i], (j - i + 1) * sizeof(WCHAR));
|
|
fpus.Buffer[j - i + 1] = 0;
|
|
|
|
if (fpus.Length > dsus.Length) { // check for :$DATA suffix
|
|
UNICODE_STRING lb;
|
|
|
|
lb.Buffer = &fpus.Buffer[(fpus.Length - dsus.Length)/sizeof(WCHAR)];
|
|
lb.Length = lb.MaximumLength = dsus.Length;
|
|
|
|
TRACE("lb = %.*S\n", lb.Length/sizeof(WCHAR), lb.Buffer);
|
|
|
|
if (FsRtlAreNamesEqual(&dsus, &lb, TRUE, NULL)) {
|
|
TRACE("ignoring :$DATA suffix\n");
|
|
|
|
fpus.Length -= lb.Length;
|
|
|
|
if (fpus.Length > sizeof(WCHAR) && fpus.Buffer[(fpus.Length-1)/sizeof(WCHAR)] == ':')
|
|
fpus.Length -= sizeof(WCHAR);
|
|
|
|
TRACE("fpus = %.*S\n", fpus.Length / sizeof(WCHAR), fpus.Buffer);
|
|
}
|
|
}
|
|
|
|
stream.Length = 0;
|
|
|
|
for (i = 0; i < fpus.Length / sizeof(WCHAR); i++) {
|
|
if (fpus.Buffer[i] == ':') {
|
|
stream.Length = (USHORT)(fpus.Length - (i * sizeof(WCHAR)) - sizeof(WCHAR));
|
|
stream.Buffer = &fpus.Buffer[i+1];
|
|
fpus.Buffer[i] = 0;
|
|
fpus.Length = (USHORT)(i * sizeof(WCHAR));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (stream.Length > 0) {
|
|
Status = create_stream(Vcb, &fileref, &parfileref, &fpus, &stream, Irp, options, pool_type, IrpSp->Flags & SL_CASE_SENSITIVE, rollback);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("create_stream returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
IoSetShareAccess(IrpSp->Parameters.Create.SecurityContext->DesiredAccess, IrpSp->Parameters.Create.ShareAccess,
|
|
FileObject, &fileref->fcb->share_access);
|
|
} else {
|
|
ACCESS_MASK granted_access;
|
|
|
|
if (!is_file_name_valid(&fpus, FALSE)) {
|
|
Status = STATUS_OBJECT_NAME_INVALID;
|
|
goto end;
|
|
}
|
|
|
|
SeLockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if (!SeAccessCheck(parfileref->fcb->sd, &IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext,
|
|
TRUE, options & FILE_DIRECTORY_FILE ? FILE_ADD_SUBDIRECTORY : FILE_ADD_FILE, 0, NULL,
|
|
IoGetFileObjectGenericMapping(), IrpSp->Flags & SL_FORCE_ACCESS_CHECK ? UserMode : Irp->RequestorMode,
|
|
&granted_access, &Status)) {
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
goto end;
|
|
}
|
|
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if (Irp->AssociatedIrp.SystemBuffer && IrpSp->Parameters.Create.EaLength > 0) {
|
|
ULONG offset;
|
|
|
|
Status = IoCheckEaBufferValidity(Irp->AssociatedIrp.SystemBuffer, IrpSp->Parameters.Create.EaLength, &offset);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("IoCheckEaBufferValidity returned %08x (error at offset %u)\n", Status, offset);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
Status = file_create2(Irp, Vcb, &fpus, parfileref, options, Irp->AssociatedIrp.SystemBuffer, IrpSp->Parameters.Create.EaLength,
|
|
&fileref, rollback);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("file_create2 returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
|
|
IoSetShareAccess(IrpSp->Parameters.Create.SecurityContext->DesiredAccess, IrpSp->Parameters.Create.ShareAccess, FileObject, &fileref->fcb->share_access);
|
|
|
|
send_notification_fileref(fileref, options & FILE_DIRECTORY_FILE ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED, NULL);
|
|
send_notification_fcb(fileref->parent, FILE_NOTIFY_CHANGE_LAST_WRITE, FILE_ACTION_MODIFIED, NULL);
|
|
}
|
|
|
|
FileObject->FsContext = fileref->fcb;
|
|
|
|
ccb = ExAllocatePoolWithTag(NonPagedPool, sizeof(*ccb), ALLOC_TAG);
|
|
if (!ccb) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
free_fileref(Vcb, fileref);
|
|
goto end;
|
|
}
|
|
|
|
RtlZeroMemory(ccb, sizeof(*ccb));
|
|
|
|
ccb->fileref = fileref;
|
|
|
|
ccb->NodeType = BTRFS_NODE_TYPE_CCB;
|
|
ccb->NodeSize = sizeof(*ccb);
|
|
ccb->disposition = disposition;
|
|
ccb->options = options;
|
|
ccb->query_dir_offset = 0;
|
|
RtlInitUnicodeString(&ccb->query_string, NULL);
|
|
ccb->has_wildcard = FALSE;
|
|
ccb->specific_file = FALSE;
|
|
ccb->access = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
|
|
ccb->case_sensitive = IrpSp->Flags & SL_CASE_SENSITIVE;
|
|
ccb->reserving = FALSE;
|
|
ccb->lxss = called_from_lxss();
|
|
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
oc = InterlockedIncrement(&fileref->open_count);
|
|
ERR("fileref %p: open_count now %i\n", fileref, oc);
|
|
#else
|
|
InterlockedIncrement(&fileref->open_count);
|
|
#endif
|
|
InterlockedIncrement(&Vcb->open_files);
|
|
|
|
FileObject->FsContext2 = ccb;
|
|
|
|
FileObject->SectionObjectPointer = &fileref->fcb->nonpaged->segment_object;
|
|
|
|
goto end2;
|
|
|
|
end:
|
|
if (fpus.Buffer)
|
|
ExFreePool(fpus.Buffer);
|
|
|
|
end2:
|
|
if (parfileref && !loaded_related)
|
|
free_fileref(Vcb, parfileref);
|
|
|
|
return Status;
|
|
}
|
|
|
|
static __inline void debug_create_options(ULONG RequestedOptions) {
|
|
if (RequestedOptions != 0) {
|
|
ULONG options = RequestedOptions;
|
|
|
|
TRACE("requested options:\n");
|
|
|
|
if (options & FILE_DIRECTORY_FILE) {
|
|
TRACE(" FILE_DIRECTORY_FILE\n");
|
|
options &= ~FILE_DIRECTORY_FILE;
|
|
}
|
|
|
|
if (options & FILE_WRITE_THROUGH) {
|
|
TRACE(" FILE_WRITE_THROUGH\n");
|
|
options &= ~FILE_WRITE_THROUGH;
|
|
}
|
|
|
|
if (options & FILE_SEQUENTIAL_ONLY) {
|
|
TRACE(" FILE_SEQUENTIAL_ONLY\n");
|
|
options &= ~FILE_SEQUENTIAL_ONLY;
|
|
}
|
|
|
|
if (options & FILE_NO_INTERMEDIATE_BUFFERING) {
|
|
TRACE(" FILE_NO_INTERMEDIATE_BUFFERING\n");
|
|
options &= ~FILE_NO_INTERMEDIATE_BUFFERING;
|
|
}
|
|
|
|
if (options & FILE_SYNCHRONOUS_IO_ALERT) {
|
|
TRACE(" FILE_SYNCHRONOUS_IO_ALERT\n");
|
|
options &= ~FILE_SYNCHRONOUS_IO_ALERT;
|
|
}
|
|
|
|
if (options & FILE_SYNCHRONOUS_IO_NONALERT) {
|
|
TRACE(" FILE_SYNCHRONOUS_IO_NONALERT\n");
|
|
options &= ~FILE_SYNCHRONOUS_IO_NONALERT;
|
|
}
|
|
|
|
if (options & FILE_NON_DIRECTORY_FILE) {
|
|
TRACE(" FILE_NON_DIRECTORY_FILE\n");
|
|
options &= ~FILE_NON_DIRECTORY_FILE;
|
|
}
|
|
|
|
if (options & FILE_CREATE_TREE_CONNECTION) {
|
|
TRACE(" FILE_CREATE_TREE_CONNECTION\n");
|
|
options &= ~FILE_CREATE_TREE_CONNECTION;
|
|
}
|
|
|
|
if (options & FILE_COMPLETE_IF_OPLOCKED) {
|
|
TRACE(" FILE_COMPLETE_IF_OPLOCKED\n");
|
|
options &= ~FILE_COMPLETE_IF_OPLOCKED;
|
|
}
|
|
|
|
if (options & FILE_NO_EA_KNOWLEDGE) {
|
|
TRACE(" FILE_NO_EA_KNOWLEDGE\n");
|
|
options &= ~FILE_NO_EA_KNOWLEDGE;
|
|
}
|
|
|
|
if (options & FILE_OPEN_REMOTE_INSTANCE) {
|
|
TRACE(" FILE_OPEN_REMOTE_INSTANCE\n");
|
|
options &= ~FILE_OPEN_REMOTE_INSTANCE;
|
|
}
|
|
|
|
if (options & FILE_RANDOM_ACCESS) {
|
|
TRACE(" FILE_RANDOM_ACCESS\n");
|
|
options &= ~FILE_RANDOM_ACCESS;
|
|
}
|
|
|
|
if (options & FILE_DELETE_ON_CLOSE) {
|
|
TRACE(" FILE_DELETE_ON_CLOSE\n");
|
|
options &= ~FILE_DELETE_ON_CLOSE;
|
|
}
|
|
|
|
if (options & FILE_OPEN_BY_FILE_ID) {
|
|
TRACE(" FILE_OPEN_BY_FILE_ID\n");
|
|
options &= ~FILE_OPEN_BY_FILE_ID;
|
|
}
|
|
|
|
if (options & FILE_OPEN_FOR_BACKUP_INTENT) {
|
|
TRACE(" FILE_OPEN_FOR_BACKUP_INTENT\n");
|
|
options &= ~FILE_OPEN_FOR_BACKUP_INTENT;
|
|
}
|
|
|
|
if (options & FILE_NO_COMPRESSION) {
|
|
TRACE(" FILE_NO_COMPRESSION\n");
|
|
options &= ~FILE_NO_COMPRESSION;
|
|
}
|
|
|
|
#if NTDDI_VERSION >= NTDDI_WIN7
|
|
if (options & FILE_OPEN_REQUIRING_OPLOCK) {
|
|
TRACE(" FILE_OPEN_REQUIRING_OPLOCK\n");
|
|
options &= ~FILE_OPEN_REQUIRING_OPLOCK;
|
|
}
|
|
|
|
if (options & FILE_DISALLOW_EXCLUSIVE) {
|
|
TRACE(" FILE_DISALLOW_EXCLUSIVE\n");
|
|
options &= ~FILE_DISALLOW_EXCLUSIVE;
|
|
}
|
|
#endif
|
|
|
|
if (options & FILE_RESERVE_OPFILTER) {
|
|
TRACE(" FILE_RESERVE_OPFILTER\n");
|
|
options &= ~FILE_RESERVE_OPFILTER;
|
|
}
|
|
|
|
if (options & FILE_OPEN_REPARSE_POINT) {
|
|
TRACE(" FILE_OPEN_REPARSE_POINT\n");
|
|
options &= ~FILE_OPEN_REPARSE_POINT;
|
|
}
|
|
|
|
if (options & FILE_OPEN_NO_RECALL) {
|
|
TRACE(" FILE_OPEN_NO_RECALL\n");
|
|
options &= ~FILE_OPEN_NO_RECALL;
|
|
}
|
|
|
|
if (options & FILE_OPEN_FOR_FREE_SPACE_QUERY) {
|
|
TRACE(" FILE_OPEN_FOR_FREE_SPACE_QUERY\n");
|
|
options &= ~FILE_OPEN_FOR_FREE_SPACE_QUERY;
|
|
}
|
|
|
|
if (options)
|
|
TRACE(" unknown options: %x\n", options);
|
|
} else {
|
|
TRACE("requested options: (none)\n");
|
|
}
|
|
}
|
|
|
|
static NTSTATUS get_reparse_block(fcb* fcb, UINT8** data) {
|
|
NTSTATUS Status;
|
|
|
|
if (fcb->type == BTRFS_TYPE_FILE || fcb->type == BTRFS_TYPE_SYMLINK) {
|
|
ULONG size, bytes_read, i;
|
|
|
|
if (fcb->type == BTRFS_TYPE_FILE && fcb->inode_item.st_size < sizeof(ULONG)) {
|
|
WARN("file was too short to be a reparse point\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
// 0x10007 = 0xffff (maximum length of data buffer) + 8 bytes header
|
|
size = (ULONG)min(0x10007, fcb->inode_item.st_size);
|
|
|
|
if (size == 0)
|
|
return STATUS_INVALID_PARAMETER;
|
|
|
|
*data = ExAllocatePoolWithTag(PagedPool, size, ALLOC_TAG);
|
|
if (!*data) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = read_file(fcb, *data, 0, size, &bytes_read, NULL);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("read_file_fcb returned %08x\n", Status);
|
|
ExFreePool(*data);
|
|
return Status;
|
|
}
|
|
|
|
if (fcb->type == BTRFS_TYPE_SYMLINK) {
|
|
ULONG stringlen, reqlen;
|
|
UINT16 subnamelen, printnamelen;
|
|
REPARSE_DATA_BUFFER* rdb;
|
|
|
|
Status = RtlUTF8ToUnicodeN(NULL, 0, &stringlen, (char*)*data, bytes_read);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 1 returned %08x\n", Status);
|
|
ExFreePool(*data);
|
|
return Status;
|
|
}
|
|
|
|
subnamelen = printnamelen = (USHORT)stringlen;
|
|
|
|
reqlen = offsetof(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) + subnamelen + printnamelen;
|
|
|
|
rdb = ExAllocatePoolWithTag(PagedPool, reqlen, ALLOC_TAG);
|
|
|
|
if (!rdb) {
|
|
ERR("out of memory\n");
|
|
ExFreePool(*data);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
rdb->ReparseTag = IO_REPARSE_TAG_SYMLINK;
|
|
rdb->ReparseDataLength = (USHORT)(reqlen - offsetof(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer));
|
|
rdb->Reserved = 0;
|
|
|
|
rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset = 0;
|
|
rdb->SymbolicLinkReparseBuffer.SubstituteNameLength = subnamelen;
|
|
rdb->SymbolicLinkReparseBuffer.PrintNameOffset = subnamelen;
|
|
rdb->SymbolicLinkReparseBuffer.PrintNameLength = printnamelen;
|
|
rdb->SymbolicLinkReparseBuffer.Flags = SYMLINK_FLAG_RELATIVE;
|
|
|
|
Status = RtlUTF8ToUnicodeN(&rdb->SymbolicLinkReparseBuffer.PathBuffer[rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR)],
|
|
stringlen, &stringlen, (char*)*data, size);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("RtlUTF8ToUnicodeN 2 returned %08x\n", Status);
|
|
ExFreePool(rdb);
|
|
ExFreePool(*data);
|
|
return Status;
|
|
}
|
|
|
|
for (i = 0; i < stringlen / sizeof(WCHAR); i++) {
|
|
if (rdb->SymbolicLinkReparseBuffer.PathBuffer[(rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR)) + i] == '/')
|
|
rdb->SymbolicLinkReparseBuffer.PathBuffer[(rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR)) + i] = '\\';
|
|
}
|
|
|
|
RtlCopyMemory(&rdb->SymbolicLinkReparseBuffer.PathBuffer[rdb->SymbolicLinkReparseBuffer.PrintNameOffset / sizeof(WCHAR)],
|
|
&rdb->SymbolicLinkReparseBuffer.PathBuffer[rdb->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR)],
|
|
rdb->SymbolicLinkReparseBuffer.SubstituteNameLength);
|
|
|
|
ExFreePool(*data);
|
|
|
|
*data = (UINT8*)rdb;
|
|
} else {
|
|
Status = FsRtlValidateReparsePointBuffer(bytes_read, (REPARSE_DATA_BUFFER*)*data);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("FsRtlValidateReparsePointBuffer returned %08x\n", Status);
|
|
ExFreePool(*data);
|
|
return Status;
|
|
}
|
|
}
|
|
} else if (fcb->type == BTRFS_TYPE_DIRECTORY) {
|
|
if (!fcb->reparse_xattr.Buffer || fcb->reparse_xattr.Length == 0)
|
|
return STATUS_INTERNAL_ERROR;
|
|
|
|
if (fcb->reparse_xattr.Length < sizeof(ULONG)) {
|
|
WARN("xattr was too short to be a reparse point\n");
|
|
return STATUS_INTERNAL_ERROR;
|
|
}
|
|
|
|
Status = FsRtlValidateReparsePointBuffer(fcb->reparse_xattr.Length, (REPARSE_DATA_BUFFER*)fcb->reparse_xattr.Buffer);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("FsRtlValidateReparsePointBuffer returned %08x\n", Status);
|
|
return Status;
|
|
}
|
|
|
|
*data = ExAllocatePoolWithTag(PagedPool, fcb->reparse_xattr.Length, ALLOC_TAG);
|
|
if (!*data) {
|
|
ERR("out of memory\n");
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
RtlCopyMemory(*data, fcb->reparse_xattr.Buffer, fcb->reparse_xattr.Length);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static void fcb_load_csums(_Requires_lock_held_(_Curr_->tree_lock) device_extension* Vcb, fcb* fcb, PIRP Irp) {
|
|
LIST_ENTRY* le;
|
|
NTSTATUS Status;
|
|
|
|
if (fcb->csum_loaded)
|
|
return;
|
|
|
|
if (IsListEmpty(&fcb->extents) || fcb->inode_item.flags & BTRFS_INODE_NODATASUM)
|
|
goto end;
|
|
|
|
le = fcb->extents.Flink;
|
|
while (le != &fcb->extents) {
|
|
extent* ext = CONTAINING_RECORD(le, extent, list_entry);
|
|
|
|
if (ext->extent_data.type == EXTENT_TYPE_REGULAR) {
|
|
EXTENT_DATA2* ed2 = (EXTENT_DATA2*)&ext->extent_data.data[0];
|
|
UINT64 len;
|
|
|
|
len = (ext->extent_data.compression == BTRFS_COMPRESSION_NONE ? ed2->num_bytes : ed2->size) / Vcb->superblock.sector_size;
|
|
|
|
ext->csum = ExAllocatePoolWithTag(NonPagedPool, (ULONG)(len * sizeof(UINT32)), ALLOC_TAG);
|
|
if (!ext->csum) {
|
|
ERR("out of memory\n");
|
|
goto end;
|
|
}
|
|
|
|
Status = load_csum(Vcb, ext->csum, ed2->address + (ext->extent_data.compression == BTRFS_COMPRESSION_NONE ? ed2->offset : 0), len, Irp);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("load_csum returned %08x\n", Status);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
le = le->Flink;
|
|
}
|
|
|
|
end:
|
|
fcb->csum_loaded = TRUE;
|
|
}
|
|
|
|
static NTSTATUS open_file(PDEVICE_OBJECT DeviceObject, _Requires_lock_held_(_Curr_->tree_lock) device_extension* Vcb, PIRP Irp, LIST_ENTRY* rollback) {
|
|
PFILE_OBJECT FileObject = NULL;
|
|
ULONG RequestedDisposition;
|
|
ULONG options;
|
|
NTSTATUS Status;
|
|
ccb* ccb;
|
|
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
USHORT parsed;
|
|
ULONG fn_offset = 0;
|
|
file_ref *related, *fileref = NULL;
|
|
POOL_TYPE pool_type = IrpSp->Flags & SL_OPEN_PAGING_FILE ? NonPagedPool : PagedPool;
|
|
ACCESS_MASK granted_access;
|
|
BOOL loaded_related = FALSE;
|
|
UNICODE_STRING fn;
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG oc;
|
|
#endif
|
|
#ifdef DEBUG_STATS
|
|
LARGE_INTEGER time1, time2;
|
|
UINT8 open_type = 0;
|
|
|
|
time1 = KeQueryPerformanceCounter(NULL);
|
|
#endif
|
|
|
|
Irp->IoStatus.Information = 0;
|
|
|
|
RequestedDisposition = ((IrpSp->Parameters.Create.Options >> 24) & 0xff);
|
|
options = IrpSp->Parameters.Create.Options & FILE_VALID_OPTION_FLAGS;
|
|
|
|
if (options & FILE_DIRECTORY_FILE && RequestedDisposition == FILE_SUPERSEDE) {
|
|
WARN("error - supersede requested with FILE_DIRECTORY_FILE\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
FileObject = IrpSp->FileObject;
|
|
|
|
if (!FileObject) {
|
|
ERR("FileObject was NULL\n");
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (FileObject->RelatedFileObject && FileObject->RelatedFileObject->FsContext2) {
|
|
struct _ccb* relatedccb = FileObject->RelatedFileObject->FsContext2;
|
|
|
|
related = relatedccb->fileref;
|
|
} else
|
|
related = NULL;
|
|
|
|
debug_create_options(options);
|
|
|
|
switch (RequestedDisposition) {
|
|
case FILE_SUPERSEDE:
|
|
TRACE("requested disposition: FILE_SUPERSEDE\n");
|
|
break;
|
|
|
|
case FILE_CREATE:
|
|
TRACE("requested disposition: FILE_CREATE\n");
|
|
break;
|
|
|
|
case FILE_OPEN:
|
|
TRACE("requested disposition: FILE_OPEN\n");
|
|
break;
|
|
|
|
case FILE_OPEN_IF:
|
|
TRACE("requested disposition: FILE_OPEN_IF\n");
|
|
break;
|
|
|
|
case FILE_OVERWRITE:
|
|
TRACE("requested disposition: FILE_OVERWRITE\n");
|
|
break;
|
|
|
|
case FILE_OVERWRITE_IF:
|
|
TRACE("requested disposition: FILE_OVERWRITE_IF\n");
|
|
break;
|
|
|
|
default:
|
|
ERR("unknown disposition: %x\n", RequestedDisposition);
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
goto exit;
|
|
}
|
|
|
|
fn = FileObject->FileName;
|
|
|
|
TRACE("(%.*S)\n", fn.Length / sizeof(WCHAR), fn.Buffer);
|
|
TRACE("FileObject = %p\n", FileObject);
|
|
|
|
if (Vcb->readonly && (RequestedDisposition == FILE_SUPERSEDE || RequestedDisposition == FILE_CREATE || RequestedDisposition == FILE_OVERWRITE)) {
|
|
Status = STATUS_MEDIA_WRITE_PROTECTED;
|
|
goto exit;
|
|
}
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
|
|
if (options & FILE_OPEN_BY_FILE_ID) {
|
|
if (fn.Length == sizeof(UINT64) && related && RequestedDisposition == FILE_OPEN) {
|
|
UINT64 inode;
|
|
|
|
RtlCopyMemory(&inode, fn.Buffer, sizeof(UINT64));
|
|
|
|
if (related->fcb == Vcb->root_fileref->fcb && inode == 0)
|
|
inode = Vcb->root_fileref->fcb->inode;
|
|
|
|
if (inode == 0) { // we use 0 to mean the parent of a subvolume
|
|
fileref = related->parent;
|
|
increase_fileref_refcount(fileref);
|
|
Status = STATUS_SUCCESS;
|
|
} else {
|
|
Status = open_fileref_by_inode(Vcb, related->fcb->subvol, inode, &fileref, Irp);
|
|
}
|
|
} else {
|
|
WARN("FILE_OPEN_BY_FILE_ID only supported for inodes\n");
|
|
Status = STATUS_NOT_IMPLEMENTED;
|
|
release_fcb_lock(Vcb);
|
|
goto exit;
|
|
}
|
|
} else {
|
|
if (related && fn.Length != 0 && fn.Buffer[0] == '\\') {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
release_fcb_lock(Vcb);
|
|
goto exit;
|
|
}
|
|
|
|
if (!related && RequestedDisposition != FILE_OPEN && !(IrpSp->Flags & SL_OPEN_TARGET_DIRECTORY)) {
|
|
ULONG fnoff;
|
|
|
|
Status = open_fileref(Vcb, &related, &fn, NULL, TRUE, &parsed, &fnoff,
|
|
pool_type, IrpSp->Flags & SL_CASE_SENSITIVE, Irp);
|
|
|
|
if (Status == STATUS_OBJECT_NAME_NOT_FOUND)
|
|
Status = STATUS_OBJECT_PATH_NOT_FOUND;
|
|
else if (Status == STATUS_REPARSE)
|
|
fileref = related;
|
|
else if (NT_SUCCESS(Status)) {
|
|
fnoff *= sizeof(WCHAR);
|
|
fnoff += (related->dc ? related->dc->name.Length : 0) + sizeof(WCHAR);
|
|
|
|
if (related->fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT) {
|
|
Status = STATUS_REPARSE;
|
|
fileref = related;
|
|
parsed = (USHORT)fnoff - sizeof(WCHAR);
|
|
} else {
|
|
fn.Buffer = &fn.Buffer[fnoff / sizeof(WCHAR)];
|
|
fn.Length -= (USHORT)fnoff;
|
|
|
|
Status = open_fileref(Vcb, &fileref, &fn, related, IrpSp->Flags & SL_OPEN_TARGET_DIRECTORY, &parsed, &fn_offset,
|
|
pool_type, IrpSp->Flags & SL_CASE_SENSITIVE, Irp);
|
|
|
|
loaded_related = TRUE;
|
|
}
|
|
|
|
}
|
|
} else {
|
|
Status = open_fileref(Vcb, &fileref, &fn, related, IrpSp->Flags & SL_OPEN_TARGET_DIRECTORY, &parsed, &fn_offset,
|
|
pool_type, IrpSp->Flags & SL_CASE_SENSITIVE, Irp);
|
|
}
|
|
}
|
|
|
|
if (Status == STATUS_REPARSE) {
|
|
REPARSE_DATA_BUFFER* data;
|
|
|
|
ExAcquireResourceSharedLite(fileref->fcb->Header.Resource, TRUE);
|
|
Status = get_reparse_block(fileref->fcb, (UINT8**)&data);
|
|
ExReleaseResourceLite(fileref->fcb->Header.Resource);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("get_reparse_block returned %08x\n", Status);
|
|
|
|
Status = STATUS_SUCCESS;
|
|
} else {
|
|
Status = STATUS_REPARSE;
|
|
RtlCopyMemory(&Irp->IoStatus.Information, data, sizeof(ULONG));
|
|
|
|
data->Reserved = FileObject->FileName.Length - parsed;
|
|
|
|
Irp->Tail.Overlay.AuxiliaryBuffer = (void*)data;
|
|
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (NT_SUCCESS(Status) && fileref->deleted)
|
|
Status = STATUS_OBJECT_NAME_NOT_FOUND;
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
if (RequestedDisposition == FILE_CREATE) {
|
|
TRACE("file %S already exists, returning STATUS_OBJECT_NAME_COLLISION\n", file_desc_fileref(fileref));
|
|
Status = STATUS_OBJECT_NAME_COLLISION;
|
|
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
} else if (Status == STATUS_OBJECT_NAME_NOT_FOUND) {
|
|
if (RequestedDisposition == FILE_OPEN || RequestedDisposition == FILE_OVERWRITE) {
|
|
TRACE("file doesn't exist, returning STATUS_OBJECT_NAME_NOT_FOUND\n");
|
|
release_fcb_lock(Vcb);
|
|
goto exit;
|
|
}
|
|
} else if (Status == STATUS_OBJECT_PATH_NOT_FOUND) {
|
|
TRACE("open_fileref returned %08x\n", Status);
|
|
release_fcb_lock(Vcb);
|
|
goto exit;
|
|
} else {
|
|
ERR("open_fileref returned %08x\n", Status);
|
|
release_fcb_lock(Vcb);
|
|
goto exit;
|
|
}
|
|
|
|
if (NT_SUCCESS(Status)) { // file already exists
|
|
file_ref* sf;
|
|
BOOL readonly;
|
|
|
|
release_fcb_lock(Vcb);
|
|
|
|
if (RequestedDisposition == FILE_SUPERSEDE || RequestedDisposition == FILE_OVERWRITE || RequestedDisposition == FILE_OVERWRITE_IF) {
|
|
LARGE_INTEGER zero;
|
|
|
|
#ifdef DEBUG_STATS
|
|
open_type = 1;
|
|
#endif
|
|
if (fileref->fcb->type == BTRFS_TYPE_DIRECTORY || is_subvol_readonly(fileref->fcb->subvol, Irp)) {
|
|
Status = STATUS_ACCESS_DENIED;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
if (Vcb->readonly) {
|
|
Status = STATUS_MEDIA_WRITE_PROTECTED;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
zero.QuadPart = 0;
|
|
if (!MmCanFileBeTruncated(&fileref->fcb->nonpaged->segment_object, &zero)) {
|
|
Status = STATUS_USER_MAPPED_FILE;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (IrpSp->Parameters.Create.SecurityContext->DesiredAccess != 0) {
|
|
SeLockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
|
|
if (!SeAccessCheck((fileref->fcb->ads || fileref->fcb == Vcb->dummy_fcb) ? fileref->parent->fcb->sd : fileref->fcb->sd,
|
|
&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext,
|
|
TRUE, IrpSp->Parameters.Create.SecurityContext->DesiredAccess, 0, NULL,
|
|
IoGetFileObjectGenericMapping(), IrpSp->Flags & SL_FORCE_ACCESS_CHECK ? UserMode : Irp->RequestorMode,
|
|
&granted_access, &Status)) {
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
TRACE("SeAccessCheck failed, returning %08x\n", Status);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
SeUnlockSubjectContext(&IrpSp->Parameters.Create.SecurityContext->AccessState->SubjectSecurityContext);
|
|
} else
|
|
granted_access = 0;
|
|
|
|
TRACE("deleted = %s\n", fileref->deleted ? "TRUE" : "FALSE");
|
|
|
|
sf = fileref;
|
|
while (sf) {
|
|
if (sf->delete_on_close) {
|
|
TRACE("could not open as deletion pending\n");
|
|
Status = STATUS_DELETE_PENDING;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
sf = sf->parent;
|
|
}
|
|
|
|
readonly = (!fileref->fcb->ads && fileref->fcb->atts & FILE_ATTRIBUTE_READONLY) || (fileref->fcb->ads && fileref->parent->fcb->atts & FILE_ATTRIBUTE_READONLY) ||
|
|
is_subvol_readonly(fileref->fcb->subvol, Irp) || fileref->fcb == Vcb->dummy_fcb || Vcb->readonly;
|
|
|
|
if (options & FILE_DELETE_ON_CLOSE && (fileref == Vcb->root_fileref || readonly)) {
|
|
Status = STATUS_CANNOT_DELETE;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
if (readonly) {
|
|
ACCESS_MASK allowed;
|
|
|
|
allowed = READ_CONTROL | SYNCHRONIZE | ACCESS_SYSTEM_SECURITY | FILE_READ_DATA |
|
|
FILE_READ_EA | FILE_READ_ATTRIBUTES | FILE_EXECUTE | FILE_LIST_DIRECTORY |
|
|
FILE_TRAVERSE;
|
|
|
|
if (!Vcb->readonly && (fileref->fcb == Vcb->dummy_fcb || fileref->fcb->inode == SUBVOL_ROOT_INODE))
|
|
allowed |= DELETE;
|
|
|
|
if (fileref->fcb != Vcb->dummy_fcb && !is_subvol_readonly(fileref->fcb->subvol, Irp) && !Vcb->readonly) {
|
|
allowed |= DELETE | WRITE_OWNER | WRITE_DAC | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
|
|
|
|
if (!fileref->fcb->ads && fileref->fcb->type == BTRFS_TYPE_DIRECTORY)
|
|
allowed |= FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE | FILE_DELETE_CHILD;
|
|
} else if (fileref->fcb->inode == SUBVOL_ROOT_INODE && is_subvol_readonly(fileref->fcb->subvol, Irp) && !Vcb->readonly) {
|
|
// We allow a subvolume root to be opened read-write even if its readonly flag is set, so it can be cleared
|
|
|
|
allowed |= FILE_WRITE_ATTRIBUTES;
|
|
}
|
|
|
|
if (IrpSp->Parameters.Create.SecurityContext->DesiredAccess & MAXIMUM_ALLOWED) {
|
|
granted_access &= allowed;
|
|
IrpSp->Parameters.Create.SecurityContext->AccessState->PreviouslyGrantedAccess &= allowed;
|
|
} else if (granted_access & ~allowed) {
|
|
Status = Vcb->readonly ? STATUS_MEDIA_WRITE_PROTECTED : STATUS_ACCESS_DENIED;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if ((fileref->fcb->type == BTRFS_TYPE_SYMLINK || fileref->fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT) && !(options & FILE_OPEN_REPARSE_POINT)) {
|
|
REPARSE_DATA_BUFFER* data;
|
|
|
|
/* How reparse points work from the point of view of the filesystem appears to
|
|
* undocumented. When returning STATUS_REPARSE, MSDN encourages us to return
|
|
* IO_REPARSE in Irp->IoStatus.Information, but that means we have to do our own
|
|
* translation. If we instead return the reparse tag in Information, and store
|
|
* a pointer to the reparse data buffer in Irp->Tail.Overlay.AuxiliaryBuffer,
|
|
* IopSymlinkProcessReparse will do the translation for us. */
|
|
|
|
Status = get_reparse_block(fileref->fcb, (UINT8**)&data);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("get_reparse_block returned %08x\n", Status);
|
|
Status = STATUS_SUCCESS;
|
|
} else {
|
|
Status = STATUS_REPARSE;
|
|
Irp->IoStatus.Information = data->ReparseTag;
|
|
|
|
if (fn.Buffer[(fn.Length / sizeof(WCHAR)) - 1] == '\\')
|
|
data->Reserved = sizeof(WCHAR);
|
|
|
|
Irp->Tail.Overlay.AuxiliaryBuffer = (void*)data;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (fileref->fcb->type == BTRFS_TYPE_DIRECTORY && !fileref->fcb->ads) {
|
|
if (options & FILE_NON_DIRECTORY_FILE && !(fileref->fcb->atts & FILE_ATTRIBUTE_REPARSE_POINT)) {
|
|
Status = STATUS_FILE_IS_A_DIRECTORY;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
} else if (options & FILE_DIRECTORY_FILE) {
|
|
TRACE("returning STATUS_NOT_A_DIRECTORY (type = %u, %S)\n", fileref->fcb->type, file_desc_fileref(fileref));
|
|
Status = STATUS_NOT_A_DIRECTORY;
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
if (fileref->open_count > 0) {
|
|
Status = IoCheckShareAccess(granted_access, IrpSp->Parameters.Create.ShareAccess, FileObject, &fileref->fcb->share_access, FALSE);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
if (Status == STATUS_SHARING_VIOLATION)
|
|
TRACE("IoCheckShareAccess failed, returning %08x\n", Status);
|
|
else
|
|
WARN("IoCheckShareAccess failed, returning %08x\n", Status);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
IoUpdateShareAccess(FileObject, &fileref->fcb->share_access);
|
|
} else
|
|
IoSetShareAccess(granted_access, IrpSp->Parameters.Create.ShareAccess, FileObject, &fileref->fcb->share_access);
|
|
|
|
if (granted_access & FILE_WRITE_DATA || options & FILE_DELETE_ON_CLOSE) {
|
|
if (!MmFlushImageSection(&fileref->fcb->nonpaged->segment_object, MmFlushForWrite)) {
|
|
Status = (options & FILE_DELETE_ON_CLOSE) ? STATUS_CANNOT_DELETE : STATUS_SHARING_VIOLATION;
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (RequestedDisposition == FILE_OVERWRITE || RequestedDisposition == FILE_OVERWRITE_IF || RequestedDisposition == FILE_SUPERSEDE) {
|
|
ULONG defda, oldatts, filter;
|
|
LARGE_INTEGER time;
|
|
BTRFS_TIME now;
|
|
|
|
if ((RequestedDisposition == FILE_OVERWRITE || RequestedDisposition == FILE_OVERWRITE_IF) && readonly) {
|
|
WARN("cannot overwrite readonly file\n");
|
|
Status = STATUS_ACCESS_DENIED;
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
if (!fileref->fcb->ads && (IrpSp->Parameters.Create.FileAttributes & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)) != ((fileref->fcb->atts & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN)))) {
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto exit;
|
|
}
|
|
|
|
if (fileref->fcb->ads) {
|
|
Status = stream_set_end_of_file_information(Vcb, 0, fileref->fcb, fileref, FALSE);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("stream_set_end_of_file_information returned %08x\n", Status);
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
} else {
|
|
Status = truncate_file(fileref->fcb, 0, Irp, rollback);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("truncate_file returned %08x\n", Status);
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (Irp->Overlay.AllocationSize.QuadPart > 0) {
|
|
Status = extend_file(fileref->fcb, fileref, Irp->Overlay.AllocationSize.QuadPart, TRUE, NULL, rollback);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("extend_file returned %08x\n", Status);
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (!fileref->fcb->ads) {
|
|
LIST_ENTRY* le;
|
|
|
|
if (Irp->AssociatedIrp.SystemBuffer && IrpSp->Parameters.Create.EaLength > 0) {
|
|
ULONG offset;
|
|
FILE_FULL_EA_INFORMATION* eainfo;
|
|
|
|
Status = IoCheckEaBufferValidity(Irp->AssociatedIrp.SystemBuffer, IrpSp->Parameters.Create.EaLength, &offset);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("IoCheckEaBufferValidity returned %08x (error at offset %u)\n", Status, offset);
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
fileref->fcb->ealen = 4;
|
|
|
|
// capitalize EA name
|
|
eainfo = Irp->AssociatedIrp.SystemBuffer;
|
|
do {
|
|
STRING s;
|
|
|
|
s.Length = s.MaximumLength = eainfo->EaNameLength;
|
|
s.Buffer = eainfo->EaName;
|
|
|
|
RtlUpperString(&s, &s);
|
|
|
|
fileref->fcb->ealen += 5 + eainfo->EaNameLength + eainfo->EaValueLength;
|
|
|
|
if (eainfo->NextEntryOffset == 0)
|
|
break;
|
|
|
|
eainfo = (FILE_FULL_EA_INFORMATION*)(((UINT8*)eainfo) + eainfo->NextEntryOffset);
|
|
} while (TRUE);
|
|
|
|
if (fileref->fcb->ea_xattr.Buffer)
|
|
ExFreePool(fileref->fcb->ea_xattr.Buffer);
|
|
|
|
fileref->fcb->ea_xattr.Buffer = ExAllocatePoolWithTag(pool_type, IrpSp->Parameters.Create.EaLength, ALLOC_TAG);
|
|
if (!fileref->fcb->ea_xattr.Buffer) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
fileref->fcb->ea_xattr.Length = fileref->fcb->ea_xattr.MaximumLength = (USHORT)IrpSp->Parameters.Create.EaLength;
|
|
RtlCopyMemory(fileref->fcb->ea_xattr.Buffer, Irp->AssociatedIrp.SystemBuffer, fileref->fcb->ea_xattr.Length);
|
|
} else {
|
|
if (fileref->fcb->ea_xattr.Length > 0) {
|
|
ExFreePool(fileref->fcb->ea_xattr.Buffer);
|
|
fileref->fcb->ea_xattr.Buffer = NULL;
|
|
fileref->fcb->ea_xattr.Length = fileref->fcb->ea_xattr.MaximumLength = 0;
|
|
|
|
fileref->fcb->ea_changed = TRUE;
|
|
fileref->fcb->ealen = 0;
|
|
}
|
|
}
|
|
|
|
// remove streams and send notifications
|
|
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);
|
|
LIST_ENTRY* le2 = le->Flink;
|
|
|
|
if (dc->index == 0) {
|
|
if (!dc->fileref) {
|
|
file_ref* fr2;
|
|
|
|
Status = open_fileref_child(Vcb, fileref, &dc->name, TRUE, TRUE, TRUE, PagedPool, &fr2, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
WARN("open_fileref_child returned %08x\n", Status);
|
|
}
|
|
|
|
if (dc->fileref) {
|
|
send_notification_fcb(fileref, FILE_NOTIFY_CHANGE_STREAM_NAME, FILE_ACTION_REMOVED_STREAM, &dc->name);
|
|
|
|
Status = delete_fileref(dc->fileref, NULL, NULL, rollback);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("delete_fileref returned %08x\n", Status);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
}
|
|
} else
|
|
break;
|
|
|
|
le = le2;
|
|
}
|
|
}
|
|
|
|
KeQuerySystemTime(&time);
|
|
win_time_to_unix(time, &now);
|
|
|
|
filter = FILE_NOTIFY_CHANGE_SIZE | FILE_NOTIFY_CHANGE_LAST_WRITE;
|
|
|
|
if (fileref->fcb->ads) {
|
|
fileref->parent->fcb->inode_item.st_mtime = now;
|
|
fileref->parent->fcb->inode_item_changed = TRUE;
|
|
mark_fcb_dirty(fileref->parent->fcb);
|
|
|
|
send_notification_fcb(fileref->parent, filter, FILE_ACTION_MODIFIED, &fileref->dc->name);
|
|
} else {
|
|
mark_fcb_dirty(fileref->fcb);
|
|
|
|
oldatts = fileref->fcb->atts;
|
|
|
|
defda = get_file_attributes(Vcb, fileref->fcb->subvol, fileref->fcb->inode, fileref->fcb->type,
|
|
fileref->dc && fileref->dc->name.Length >= sizeof(WCHAR) && fileref->dc->name.Buffer[0] == '.', TRUE, Irp);
|
|
|
|
if (RequestedDisposition == FILE_SUPERSEDE)
|
|
fileref->fcb->atts = IrpSp->Parameters.Create.FileAttributes | FILE_ATTRIBUTE_ARCHIVE;
|
|
else
|
|
fileref->fcb->atts |= IrpSp->Parameters.Create.FileAttributes | FILE_ATTRIBUTE_ARCHIVE;
|
|
|
|
if (fileref->fcb->atts != oldatts) {
|
|
fileref->fcb->atts_changed = TRUE;
|
|
fileref->fcb->atts_deleted = IrpSp->Parameters.Create.FileAttributes == defda;
|
|
filter |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
|
|
}
|
|
|
|
fileref->fcb->inode_item.transid = Vcb->superblock.generation;
|
|
fileref->fcb->inode_item.sequence++;
|
|
fileref->fcb->inode_item.st_ctime = now;
|
|
fileref->fcb->inode_item.st_mtime = now;
|
|
fileref->fcb->inode_item_changed = TRUE;
|
|
|
|
send_notification_fcb(fileref, filter, FILE_ACTION_MODIFIED, NULL);
|
|
}
|
|
} else {
|
|
if (options & FILE_NO_EA_KNOWLEDGE && fileref->fcb->ea_xattr.Length > 0) {
|
|
FILE_FULL_EA_INFORMATION* ffei = (FILE_FULL_EA_INFORMATION*)fileref->fcb->ea_xattr.Buffer;
|
|
|
|
do {
|
|
if (ffei->Flags & FILE_NEED_EA) {
|
|
WARN("returning STATUS_ACCESS_DENIED as no EA knowledge\n");
|
|
Status = STATUS_ACCESS_DENIED;
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
if (ffei->NextEntryOffset == 0)
|
|
break;
|
|
|
|
ffei = (FILE_FULL_EA_INFORMATION*)(((UINT8*)ffei) + ffei->NextEntryOffset);
|
|
} while (TRUE);
|
|
}
|
|
}
|
|
|
|
FileObject->FsContext = fileref->fcb;
|
|
|
|
ccb = ExAllocatePoolWithTag(NonPagedPool, sizeof(*ccb), ALLOC_TAG);
|
|
if (!ccb) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
|
|
IoRemoveShareAccess(FileObject, &fileref->fcb->share_access);
|
|
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, fileref);
|
|
release_fcb_lock(Vcb);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
RtlZeroMemory(ccb, sizeof(*ccb));
|
|
|
|
ccb->NodeType = BTRFS_NODE_TYPE_CCB;
|
|
ccb->NodeSize = sizeof(*ccb);
|
|
ccb->disposition = RequestedDisposition;
|
|
ccb->options = options;
|
|
ccb->query_dir_offset = 0;
|
|
RtlInitUnicodeString(&ccb->query_string, NULL);
|
|
ccb->has_wildcard = FALSE;
|
|
ccb->specific_file = FALSE;
|
|
ccb->access = granted_access;
|
|
ccb->case_sensitive = IrpSp->Flags & SL_CASE_SENSITIVE;
|
|
ccb->reserving = FALSE;
|
|
ccb->lxss = called_from_lxss();
|
|
|
|
ccb->fileref = fileref;
|
|
|
|
FileObject->FsContext2 = ccb;
|
|
FileObject->SectionObjectPointer = &fileref->fcb->nonpaged->segment_object;
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
switch (RequestedDisposition) {
|
|
case FILE_SUPERSEDE:
|
|
Irp->IoStatus.Information = FILE_SUPERSEDED;
|
|
break;
|
|
|
|
case FILE_OPEN:
|
|
case FILE_OPEN_IF:
|
|
Irp->IoStatus.Information = FILE_OPENED;
|
|
break;
|
|
|
|
case FILE_OVERWRITE:
|
|
case FILE_OVERWRITE_IF:
|
|
Irp->IoStatus.Information = FILE_OVERWRITTEN;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Make sure paging files don't have any extents marked as being prealloc,
|
|
// as this would mean we'd have to lock exclusively when writing.
|
|
if (IrpSp->Flags & SL_OPEN_PAGING_FILE) {
|
|
LIST_ENTRY* le;
|
|
BOOL changed = FALSE;
|
|
|
|
ExAcquireResourceExclusiveLite(fileref->fcb->Header.Resource, TRUE);
|
|
|
|
le = fileref->fcb->extents.Flink;
|
|
|
|
while (le != &fileref->fcb->extents) {
|
|
extent* ext = CONTAINING_RECORD(le, extent, list_entry);
|
|
|
|
if (ext->extent_data.type == EXTENT_TYPE_PREALLOC) {
|
|
ext->extent_data.type = EXTENT_TYPE_REGULAR;
|
|
changed = TRUE;
|
|
}
|
|
|
|
le = le->Flink;
|
|
}
|
|
|
|
ExReleaseResourceLite(fileref->fcb->Header.Resource);
|
|
|
|
if (changed) {
|
|
fileref->fcb->extents_changed = TRUE;
|
|
mark_fcb_dirty(fileref->fcb);
|
|
}
|
|
|
|
fileref->fcb->Header.Flags2 |= FSRTL_FLAG2_IS_PAGING_FILE;
|
|
Vcb->disallow_dismount = TRUE;
|
|
}
|
|
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
oc = InterlockedIncrement(&fileref->open_count);
|
|
ERR("fileref %p: open_count now %i\n", fileref, oc);
|
|
#else
|
|
InterlockedIncrement(&fileref->open_count);
|
|
#endif
|
|
InterlockedIncrement(&Vcb->open_files);
|
|
} else {
|
|
#ifdef DEBUG_STATS
|
|
open_type = 2;
|
|
#endif
|
|
Status = file_create(Irp, Vcb, FileObject, related, loaded_related, &fn, RequestedDisposition, options, rollback);
|
|
release_fcb_lock(Vcb);
|
|
|
|
Irp->IoStatus.Information = NT_SUCCESS(Status) ? FILE_CREATED : 0;
|
|
}
|
|
|
|
if (NT_SUCCESS(Status) && !(options & FILE_NO_INTERMEDIATE_BUFFERING))
|
|
FileObject->Flags |= FO_CACHE_SUPPORTED;
|
|
|
|
exit:
|
|
if (loaded_related) {
|
|
acquire_fcb_lock_exclusive(Vcb);
|
|
free_fileref(Vcb, related);
|
|
release_fcb_lock(Vcb);
|
|
}
|
|
|
|
if (Status == STATUS_SUCCESS) {
|
|
fcb* fcb2;
|
|
|
|
IrpSp->Parameters.Create.SecurityContext->AccessState->PreviouslyGrantedAccess |= granted_access;
|
|
IrpSp->Parameters.Create.SecurityContext->AccessState->RemainingDesiredAccess &= ~(granted_access | MAXIMUM_ALLOWED);
|
|
|
|
if (!FileObject->Vpb)
|
|
FileObject->Vpb = DeviceObject->Vpb;
|
|
|
|
fcb2 = FileObject->FsContext;
|
|
|
|
if (fcb2->ads) {
|
|
struct _ccb* ccb2 = FileObject->FsContext2;
|
|
|
|
fcb2 = ccb2->fileref->parent->fcb;
|
|
}
|
|
|
|
ExAcquireResourceExclusiveLite(fcb2->Header.Resource, TRUE);
|
|
fcb_load_csums(Vcb, fcb2, Irp);
|
|
ExReleaseResourceLite(fcb2->Header.Resource);
|
|
} else if (Status != STATUS_REPARSE && Status != STATUS_OBJECT_NAME_NOT_FOUND && Status != STATUS_OBJECT_PATH_NOT_FOUND)
|
|
TRACE("returning %08x\n", Status);
|
|
|
|
#ifdef DEBUG_STATS
|
|
time2 = KeQueryPerformanceCounter(NULL);
|
|
|
|
if (open_type == 0) {
|
|
Vcb->stats.open_total_time += time2.QuadPart - time1.QuadPart;
|
|
Vcb->stats.num_opens++;
|
|
} else if (open_type == 1) {
|
|
Vcb->stats.overwrite_total_time += time2.QuadPart - time1.QuadPart;
|
|
Vcb->stats.num_overwrites++;
|
|
} else if (open_type == 2) {
|
|
Vcb->stats.create_total_time += time2.QuadPart - time1.QuadPart;
|
|
Vcb->stats.num_creates++;
|
|
}
|
|
#endif
|
|
|
|
return Status;
|
|
}
|
|
|
|
static NTSTATUS verify_vcb(device_extension* Vcb, PIRP Irp) {
|
|
NTSTATUS Status;
|
|
LIST_ENTRY* le;
|
|
BOOL need_verify = FALSE;
|
|
|
|
ExAcquireResourceSharedLite(&Vcb->tree_lock, TRUE);
|
|
|
|
le = Vcb->devices.Flink;
|
|
while (le != &Vcb->devices) {
|
|
device* dev = CONTAINING_RECORD(le, device, list_entry);
|
|
|
|
if (dev->devobj && dev->removable) {
|
|
ULONG cc;
|
|
IO_STATUS_BLOCK iosb;
|
|
|
|
Status = dev_ioctl(dev->devobj, IOCTL_STORAGE_CHECK_VERIFY, NULL, 0, &cc, sizeof(ULONG), TRUE, &iosb);
|
|
|
|
if (IoIsErrorUserInduced(Status)) {
|
|
ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x (user-induced)\n", Status);
|
|
need_verify = TRUE;
|
|
} else if (!NT_SUCCESS(Status)) {
|
|
ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x\n", Status);
|
|
goto end;
|
|
} else if (iosb.Information < sizeof(ULONG)) {
|
|
ERR("iosb.Information was too short\n");
|
|
Status = STATUS_INTERNAL_ERROR;
|
|
} else if (cc != dev->change_count) {
|
|
dev->devobj->Flags |= DO_VERIFY_VOLUME;
|
|
need_verify = TRUE;
|
|
}
|
|
}
|
|
|
|
le = le->Flink;
|
|
}
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
end:
|
|
ExReleaseResourceLite(&Vcb->tree_lock);
|
|
|
|
if (need_verify) {
|
|
PDEVICE_OBJECT devobj;
|
|
|
|
devobj = IoGetDeviceToVerify(Irp->Tail.Overlay.Thread);
|
|
IoSetDeviceToVerify(Irp->Tail.Overlay.Thread, NULL);
|
|
|
|
if (!devobj) {
|
|
devobj = IoGetDeviceToVerify(PsGetCurrentThread());
|
|
IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
|
|
}
|
|
|
|
devobj = Vcb->Vpb ? Vcb->Vpb->RealDevice : NULL;
|
|
|
|
if (devobj)
|
|
Status = IoVerifyVolume(devobj, FALSE);
|
|
else
|
|
Status = STATUS_VERIFY_REQUIRED;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
static BOOL has_manage_volume_privilege(ACCESS_STATE* access_state, KPROCESSOR_MODE processor_mode) {
|
|
PRIVILEGE_SET privset;
|
|
|
|
privset.PrivilegeCount = 1;
|
|
privset.Control = PRIVILEGE_SET_ALL_NECESSARY;
|
|
privset.Privilege[0].Luid = RtlConvertLongToLuid(SE_MANAGE_VOLUME_PRIVILEGE);
|
|
privset.Privilege[0].Attributes = 0;
|
|
|
|
return SePrivilegeCheck(&privset, &access_state->SubjectSecurityContext, processor_mode) ? TRUE : FALSE;
|
|
}
|
|
|
|
_Dispatch_type_(IRP_MJ_CREATE)
|
|
_Function_class_(DRIVER_DISPATCH)
|
|
NTSTATUS NTAPI drv_create(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp) {
|
|
NTSTATUS Status;
|
|
PIO_STACK_LOCATION IrpSp;
|
|
device_extension* Vcb = DeviceObject->DeviceExtension;
|
|
BOOL top_level, locked = FALSE;
|
|
|
|
FsRtlEnterFileSystem();
|
|
|
|
TRACE("create (flags = %x)\n", Irp->Flags);
|
|
|
|
top_level = is_top_level(Irp);
|
|
|
|
/* return success if just called for FS device object */
|
|
if (DeviceObject == master_devobj) {
|
|
TRACE("create called for FS device object\n");
|
|
|
|
Irp->IoStatus.Information = FILE_OPENED;
|
|
Status = STATUS_SUCCESS;
|
|
|
|
goto exit;
|
|
} else if (Vcb && Vcb->type == VCB_TYPE_VOLUME) {
|
|
Status = vol_create(DeviceObject, Irp);
|
|
goto exit;
|
|
} else if (!Vcb || Vcb->type != VCB_TYPE_FS) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto exit;
|
|
}
|
|
|
|
if (!(Vcb->Vpb->Flags & VPB_MOUNTED)) {
|
|
Status = STATUS_DEVICE_NOT_READY;
|
|
goto exit;
|
|
}
|
|
|
|
if (Vcb->removing) {
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto exit;
|
|
}
|
|
|
|
Status = verify_vcb(Vcb, Irp);
|
|
if (!NT_SUCCESS(Status)) {
|
|
ERR("verify_vcb returned %08x\n", Status);
|
|
goto exit;
|
|
}
|
|
|
|
ExAcquireResourceSharedLite(&Vcb->load_lock, TRUE);
|
|
locked = TRUE;
|
|
|
|
IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
if (IrpSp->Flags != 0) {
|
|
UINT32 flags = IrpSp->Flags;
|
|
|
|
TRACE("flags:\n");
|
|
|
|
if (flags & SL_CASE_SENSITIVE) {
|
|
TRACE("SL_CASE_SENSITIVE\n");
|
|
flags &= ~SL_CASE_SENSITIVE;
|
|
}
|
|
|
|
if (flags & SL_FORCE_ACCESS_CHECK) {
|
|
TRACE("SL_FORCE_ACCESS_CHECK\n");
|
|
flags &= ~SL_FORCE_ACCESS_CHECK;
|
|
}
|
|
|
|
if (flags & SL_OPEN_PAGING_FILE) {
|
|
TRACE("SL_OPEN_PAGING_FILE\n");
|
|
flags &= ~SL_OPEN_PAGING_FILE;
|
|
}
|
|
|
|
if (flags & SL_OPEN_TARGET_DIRECTORY) {
|
|
TRACE("SL_OPEN_TARGET_DIRECTORY\n");
|
|
flags &= ~SL_OPEN_TARGET_DIRECTORY;
|
|
}
|
|
|
|
if (flags & SL_STOP_ON_SYMLINK) {
|
|
TRACE("SL_STOP_ON_SYMLINK\n");
|
|
flags &= ~SL_STOP_ON_SYMLINK;
|
|
}
|
|
|
|
if (flags)
|
|
WARN("unknown flags: %x\n", flags);
|
|
} else {
|
|
TRACE("flags: (none)\n");
|
|
}
|
|
|
|
if (!IrpSp->FileObject) {
|
|
ERR("FileObject was NULL\n");
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto exit;
|
|
}
|
|
|
|
if (IrpSp->FileObject->RelatedFileObject) {
|
|
fcb* relatedfcb = IrpSp->FileObject->RelatedFileObject->FsContext;
|
|
|
|
if (relatedfcb && relatedfcb->Vcb != Vcb) {
|
|
WARN("RelatedFileObject was for different device\n");
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
// opening volume
|
|
if (IrpSp->FileObject->FileName.Length == 0 && !IrpSp->FileObject->RelatedFileObject) {
|
|
ULONG RequestedDisposition = ((IrpSp->Parameters.Create.Options >> 24) & 0xff);
|
|
ULONG RequestedOptions = IrpSp->Parameters.Create.Options & FILE_VALID_OPTION_FLAGS;
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
LONG rc;
|
|
#endif
|
|
ccb* ccb;
|
|
|
|
TRACE("open operation for volume\n");
|
|
|
|
if (RequestedDisposition != FILE_OPEN && RequestedDisposition != FILE_OPEN_IF) {
|
|
Status = STATUS_ACCESS_DENIED;
|
|
goto exit;
|
|
}
|
|
|
|
if (RequestedOptions & FILE_DIRECTORY_FILE) {
|
|
Status = STATUS_NOT_A_DIRECTORY;
|
|
goto exit;
|
|
}
|
|
|
|
ccb = ExAllocatePoolWithTag(NonPagedPool, sizeof(*ccb), ALLOC_TAG);
|
|
if (!ccb) {
|
|
ERR("out of memory\n");
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto exit;
|
|
}
|
|
|
|
RtlZeroMemory(ccb, sizeof(*ccb));
|
|
|
|
ccb->NodeType = BTRFS_NODE_TYPE_CCB;
|
|
ccb->NodeSize = sizeof(*ccb);
|
|
ccb->disposition = RequestedDisposition;
|
|
ccb->options = RequestedOptions;
|
|
ccb->access = IrpSp->Parameters.Create.SecurityContext->AccessState->PreviouslyGrantedAccess;
|
|
ccb->manage_volume_privilege = has_manage_volume_privilege(IrpSp->Parameters.Create.SecurityContext->AccessState,
|
|
IrpSp->Flags & SL_FORCE_ACCESS_CHECK ? UserMode : Irp->RequestorMode);
|
|
ccb->reserving = FALSE;
|
|
ccb->lxss = called_from_lxss();
|
|
|
|
#ifdef DEBUG_FCB_REFCOUNTS
|
|
rc = InterlockedIncrement(&Vcb->volume_fcb->refcount);
|
|
WARN("fcb %p: refcount now %i (volume)\n", Vcb->volume_fcb, rc);
|
|
#else
|
|
InterlockedIncrement(&Vcb->volume_fcb->refcount);
|
|
#endif
|
|
IrpSp->FileObject->FsContext = Vcb->volume_fcb;
|
|
IrpSp->FileObject->FsContext2 = ccb;
|
|
|
|
IrpSp->FileObject->SectionObjectPointer = &Vcb->volume_fcb->nonpaged->segment_object;
|
|
|
|
if (!IrpSp->FileObject->Vpb)
|
|
IrpSp->FileObject->Vpb = DeviceObject->Vpb;
|
|
|
|
InterlockedIncrement(&Vcb->open_files);
|
|
|
|
Irp->IoStatus.Information = FILE_OPENED;
|
|
Status = STATUS_SUCCESS;
|
|
} else {
|
|
LIST_ENTRY rollback;
|
|
BOOL skip_lock;
|
|
|
|
InitializeListHead(&rollback);
|
|
|
|
TRACE("file name: %.*S\n", IrpSp->FileObject->FileName.Length / sizeof(WCHAR), IrpSp->FileObject->FileName.Buffer);
|
|
|
|
if (IrpSp->FileObject->RelatedFileObject)
|
|
TRACE("related file = %S\n", file_desc(IrpSp->FileObject->RelatedFileObject));
|
|
|
|
// Don't lock again if we're being called from within CcCopyRead etc.
|
|
skip_lock = ExIsResourceAcquiredExclusiveLite(&Vcb->tree_lock);
|
|
|
|
if (!skip_lock)
|
|
ExAcquireResourceSharedLite(&Vcb->tree_lock, TRUE);
|
|
|
|
Status = open_file(DeviceObject, Vcb, Irp, &rollback);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
do_rollback(Vcb, &rollback);
|
|
else
|
|
clear_rollback(&rollback);
|
|
|
|
if (!skip_lock)
|
|
ExReleaseResourceLite(&Vcb->tree_lock);
|
|
}
|
|
|
|
exit:
|
|
Irp->IoStatus.Status = Status;
|
|
IoCompleteRequest( Irp, NT_SUCCESS(Status) ? IO_DISK_INCREMENT : IO_NO_INCREMENT );
|
|
|
|
TRACE("create returning %08x\n", Status);
|
|
|
|
if (locked)
|
|
ExReleaseResourceLite(&Vcb->load_lock);
|
|
|
|
if (top_level)
|
|
IoSetTopLevelIrp(NULL);
|
|
|
|
FsRtlExitFileSystem();
|
|
|
|
return Status;
|
|
}
|