/*
* index.c - NTFS kernel index handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2004 Anton Altaparmakov
+ * Copyright (c) 2004-2005 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include "ntfs.h"
+#include "aops.h"
#include "collate.h"
+#include "debug.h"
#include "index.h"
+#include "ntfs.h"
/**
* ntfs_index_ctx_get - allocate and initialize a new index context
* Allocate a new index context, initialize it with @idx_ni and return it.
* Return NULL if allocation failed.
*
- * Locking: Caller must hold i_sem on the index inode.
+ * Locking: Caller must hold i_mutex on the index inode.
*/
ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni)
{
ntfs_index_context *ictx;
- ictx = kmem_cache_alloc(ntfs_index_ctx_cache, SLAB_NOFS);
- if (ictx) {
- ictx->idx_ni = idx_ni;
- ictx->entry = NULL;
- ictx->data = NULL;
- ictx->data_len = 0;
- ictx->is_in_root = 0;
- ictx->ir = NULL;
- ictx->actx = NULL;
- ictx->base_ni = NULL;
- ictx->ia = NULL;
- ictx->page = NULL;
- }
+ ictx = kmem_cache_alloc(ntfs_index_ctx_cache, GFP_NOFS);
+ if (ictx)
+ *ictx = (ntfs_index_context){ .idx_ni = idx_ni };
return ictx;
}
*
* Release the index context @ictx, releasing all associated resources.
*
- * Locking: Caller must hold i_sem on the index inode.
+ * Locking: Caller must hold i_mutex on the index inode.
*/
void ntfs_index_ctx_put(ntfs_index_context *ictx)
{
* or ntfs_index_entry_write() before the call to ntfs_index_ctx_put() to
* ensure that the changes are written to disk.
*
- * Locking: - Caller must hold i_sem on the index inode.
+ * Locking: - Caller must hold i_mutex on the index inode.
* - Each page cache page in the index allocation mapping must be
* locked whilst being accessed otherwise we may find a corrupt
* page due to it being under ->writepage at the moment which
if ((key_len == le16_to_cpu(ie->key_length)) && !memcmp(key,
&ie->key, key_len)) {
ir_done:
- ictx->is_in_root = TRUE;
+ ictx->is_in_root = true;
+ ictx->ir = ir;
ictx->actx = actx;
ictx->base_ni = base_ni;
ictx->ia = NULL;
ntfs_error(sb, "No index allocation attribute but index entry "
"requires one. Inode 0x%lx is corrupt or "
"driver bug.", idx_ni->mft_no);
- err = -EIO;
goto err_out;
}
/* Get the starting vcn of the index_block holding the child node. */
if ((u8*)ia < kaddr || (u8*)ia > kaddr + PAGE_CACHE_SIZE) {
ntfs_error(sb, "Out of bounds check failed. Corrupt inode "
"0x%lx or driver bug.", idx_ni->mft_no);
- err = -EIO;
+ goto unm_err_out;
+ }
+ /* Catch multi sector transfer fixup errors. */
+ if (unlikely(!ntfs_is_indx_record(ia->magic))) {
+ ntfs_error(sb, "Index record with vcn 0x%llx is corrupt. "
+ "Corrupt inode 0x%lx. Run chkdsk.",
+ (long long)vcn, idx_ni->mft_no);
goto unm_err_out;
}
if (sle64_to_cpu(ia->index_block_vcn) != vcn) {
(unsigned long long)
sle64_to_cpu(ia->index_block_vcn),
(unsigned long long)vcn, idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
if (le32_to_cpu(ia->index.allocated_size) + 0x18 !=
idx_ni->mft_no,
le32_to_cpu(ia->index.allocated_size) + 0x18,
idx_ni->itype.index.block_size);
- err = -EIO;
goto unm_err_out;
}
index_end = (u8*)ia + idx_ni->itype.index.block_size;
"access! This is probably a bug in the "
"driver.", (unsigned long long)vcn,
idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
index_end = (u8*)&ia->index + le32_to_cpu(ia->index.index_length);
ntfs_error(sb, "Size of index buffer (VCN 0x%llx) of inode "
"0x%lx exceeds maximum size.",
(unsigned long long)vcn, idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
/* The first index entry. */
(u8*)ie + le16_to_cpu(ie->length) > index_end) {
ntfs_error(sb, "Index entry out of bounds in inode "
"0x%lx.", idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
/*
- * The last entry cannot contain a ket. It can however contain
+ * The last entry cannot contain a key. It can however contain
* a pointer to a child node in the B+tree so we just break out.
*/
if (ie->flags & INDEX_ENTRY_END)
le16_to_cpu(ie->length)) {
ntfs_error(sb, "Index entry out of bounds in inode "
"0x%lx.", idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
/* If the keys match perfectly, we setup @ictx and return 0. */
if ((key_len == le16_to_cpu(ie->key_length)) && !memcmp(key,
&ie->key, key_len)) {
ia_done:
- ictx->is_in_root = FALSE;
+ ictx->is_in_root = false;
ictx->actx = NULL;
ictx->base_ni = NULL;
ictx->ia = ia;
if ((ia->index.flags & NODE_MASK) == LEAF_NODE) {
ntfs_error(sb, "Index entry with child node found in a leaf "
"node in inode 0x%lx.", idx_ni->mft_no);
- err = -EIO;
goto unm_err_out;
}
/* Child node present, descend into it. */
}
ntfs_error(sb, "Negative child node vcn in inode 0x%lx.",
idx_ni->mft_no);
- err = -EIO;
unm_err_out:
unlock_page(page);
ntfs_unmap_page(page);
err_out:
+ if (!err)
+ err = -EIO;
if (actx)
ntfs_attr_put_search_ctx(actx);
if (m)
return err;
idx_err_out:
ntfs_error(sb, "Corrupt index. Aborting lookup.");
- err = -EIO;
goto err_out;
}
-
-#ifdef NTFS_RW
-
-/**
- * __ntfs_index_entry_mark_dirty - mark an index allocation entry dirty
- * @ictx: ntfs index context describing the index entry
- *
- * NOTE: You want to use fs/ntfs/index.h::ntfs_index_entry_mark_dirty() instead!
- *
- * Mark the index allocation entry described by the index entry context @ictx
- * dirty.
- *
- * The index entry must be in an index block belonging to the index allocation
- * attribute. Mark the buffers belonging to the index record as well as the
- * page cache page the index block is in dirty. This automatically marks the
- * VFS inode of the ntfs index inode to which the index entry belongs dirty,
- * too (I_DIRTY_PAGES) and this in turn ensures the page buffers, and hence the
- * dirty index block, will be written out to disk later.
- */
-void __ntfs_index_entry_mark_dirty(ntfs_index_context *ictx)
-{
- ntfs_inode *ni;
- struct page *page;
- struct buffer_head *bh, *head;
- unsigned int rec_start, rec_end, bh_size, bh_start, bh_end;
-
- BUG_ON(ictx->is_in_root);
- ni = ictx->idx_ni;
- page = ictx->page;
- BUG_ON(!page_has_buffers(page));
- /*
- * If the index block is the same size as the page cache page, set all
- * the buffers in the page, as well as the page itself, dirty.
- */
- if (ni->itype.index.block_size == PAGE_CACHE_SIZE) {
- __set_page_dirty_buffers(page);
- return;
- }
- /* Set only the buffers in which the index block is located dirty. */
- rec_start = (unsigned int)((u8*)ictx->ia - (u8*)page_address(page));
- rec_end = rec_start + ni->itype.index.block_size;
- bh_size = ni->vol->sb->s_blocksize;
- bh_start = 0;
- bh = head = page_buffers(page);
- do {
- bh_end = bh_start + bh_size;
- if ((bh_start >= rec_start) && (bh_end <= rec_end))
- set_buffer_dirty(bh);
- bh_start = bh_end;
- } while ((bh = bh->b_this_page) != head);
- /* Finally, set the page itself dirty, too. */
- __set_page_dirty_nobuffers(page);
-}
-
-#endif /* NTFS_RW */
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