77fe19ba16
Unlike inodes in fs roots, we don't really check the inode items in root
tree, in fact we just skip everything other than ROOT_ITEM and ROOT_REF.
This makes invalid inode items sneak into root tree.
For example:
item 9 key (256 INODE_ITEM 0) itemoff 13702 itemsize 160
generation 30 transid 30 size 65536 nbytes 1507328
block group 0 mode 0 links 1 uid 0 gid 0 rdev 0
^ Should be 100600
sequence 23 flags 0x1b(NODATASUM|NODATACOW|NOCOMPRESS|PREALLOC)
atime 0.0 (1970-01-01 08:00:00)
ctime 1553491158.189771625 (2019-03-25 13:19:18)
mtime 0.0 (1970-01-01 08:00:00)
otime 0.0 (1970-01-01 08:00:00)
There is a report of such problem in the mail list.
This patch will check and repair inode items of free space cache inodes in
lowmem mode.
Since free space cache inodes doesn't have INODE_REF but still has 1
link, we can't use check_inode_item() directly.
Instead we only check the inode mode, as that's the important part.
The check and repair function: check_repair_free_space_inode() is also
exported for original mode.
Signed-off-by: Qu Wenruo <wqu@suse.com>
74 lines
3.4 KiB
C
74 lines
3.4 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program 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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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/*
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* Defines and function declarations for lowmem mode check.
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*/
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#ifndef __BTRFS_CHECK_MODE_LOWMEM_H__
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#define __BTRFS_CHECK_MODE_LOWMEM_H__
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#include "check/mode-common.h"
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#define ROOT_DIR_ERROR (1<<1) /* bad ROOT_DIR */
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#define DIR_ITEM_MISSING (1<<2) /* DIR_ITEM not found */
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#define DIR_ITEM_MISMATCH (1<<3) /* DIR_ITEM found but not match */
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#define INODE_REF_MISSING (1<<4) /* INODE_REF/INODE_EXTREF not found */
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#define INODE_ITEM_MISSING (1<<5) /* INODE_ITEM not found */
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#define INODE_ITEM_MISMATCH (1<<6) /* INODE_ITEM found but not match */
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#define FILE_EXTENT_ERROR (1<<7) /* bad FILE_EXTENT */
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#define ODD_CSUM_ITEM (1<<8) /* CSUM_ITEM error */
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#define CSUM_ITEM_MISSING (1<<9) /* CSUM_ITEM not found */
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#define LINK_COUNT_ERROR (1<<10) /* INODE_ITEM nlink count error */
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#define NBYTES_ERROR (1<<11) /* INODE_ITEM nbytes count error */
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#define ISIZE_ERROR (1<<12) /* INODE_ITEM size count error */
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#define ORPHAN_ITEM (1<<13) /* INODE_ITEM no reference */
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#define NO_INODE_ITEM (1<<14) /* no inode_item */
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#define LAST_ITEM (1<<15) /* Complete this tree traversal */
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#define ROOT_REF_MISSING (1<<16) /* ROOT_REF not found */
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#define ROOT_REF_MISMATCH (1<<17) /* ROOT_REF found but not match */
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#define DIR_INDEX_MISSING (1<<18) /* INODE_INDEX not found */
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#define DIR_INDEX_MISMATCH (1<<19) /* INODE_INDEX found but not match */
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#define DIR_COUNT_AGAIN (1<<20) /* DIR isize should be recalculated */
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#define BG_ACCOUNTING_ERROR (1<<21) /* Block group accounting error */
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#define FATAL_ERROR (1<<22) /* Fatal bit for errno */
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#define INODE_FLAGS_ERROR (1<<23) /* Invalid inode flags */
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#define DIR_ITEM_HASH_MISMATCH (1<<24) /* Dir item hash mismatch */
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#define INODE_MODE_ERROR (1<<25) /* Bad inode mode */
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/*
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* Error bit for low memory mode check.
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*
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* Currently no caller cares about it yet. Just internal use for error
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* classification.
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*/
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#define BACKREF_MISSING (1 << 0) /* Backref missing in extent tree */
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#define BACKREF_MISMATCH (1 << 1) /* Backref exists but does not match */
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#define BYTES_UNALIGNED (1 << 2) /* Some bytes are not aligned */
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#define REFERENCER_MISSING (1 << 3) /* Referencer not found */
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#define REFERENCER_MISMATCH (1 << 4) /* Referencer found but does not match */
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#define CROSSING_STRIPE_BOUNDARY (1 << 4) /* For kernel scrub workaround */
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#define ITEM_SIZE_MISMATCH (1 << 5) /* Bad item size */
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#define UNKNOWN_TYPE (1 << 6) /* Unknown type */
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#define ACCOUNTING_MISMATCH (1 << 7) /* Used space accounting error */
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#define CHUNK_TYPE_MISMATCH (1 << 8)
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int check_fs_roots_lowmem(struct btrfs_fs_info *fs_info);
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int check_chunks_and_extents_lowmem(struct btrfs_fs_info *fs_info);
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int check_repair_free_space_inode(struct btrfs_fs_info *fs_info,
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struct btrfs_path *path);
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#endif
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