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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 10:18:00 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 10:18:00 -0800 |
commit | 20c59c71ae711aff845eef640b25935bc9578c93 (patch) | |
tree | bba42c29760903c293fdd2e76c2a5ed078500820 /fs/xfs/libxfs/xfs_alloc.c | |
parent | 5a87e37ee0943afe11504299e4b87d2e4d8d88d5 (diff) | |
parent | 1e369b0e199bbfbab5218e1c1443d839700d8884 (diff) | |
download | linux-stable-20c59c71ae711aff845eef640b25935bc9578c93.tar.gz linux-stable-20c59c71ae711aff845eef640b25935bc9578c93.tar.bz2 linux-stable-20c59c71ae711aff845eef640b25935bc9578c93.zip |
Merge tag 'xfs-4.16-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs updates from Darrick Wong:
"This merge cycle, we're again some substantive changes to XFS.
Metadata verifiers have been restructured to provide more detail about
which part of a metadata structure failed checks, and we've enhanced
the new online fsck feature to cross-reference extent allocation
information with the other metadata structures. With this pull, the
metadata verification part of online fsck is more or less finished,
though the feature is still experimental and still disabled by
default.
We're also preparing to remove the EXPERIMENTAL tag from a couple of
features this cycle. This week we're committing a bunch of space
accounting fixes for reflink and removing the EXPERIMENTAL tag from
reflink; I anticipate that we'll be ready to do the same for the
reverse mapping feature next week. (I don't have any pending fixes for
rmap; however I wish to remove the tags one at a time.)
This giant pile of patches has been run through a full xfstests run
over the weekend and through a quick xfstests run against this
morning's master, with no major failures reported. Let me know if
there's any merge problems -- git merge reported that one of our
patches touched the same function as the i_version series, but it
resolved things cleanly.
Summary:
- Log faulting code locations when verifiers fail, for improved
diagnosis of corrupt filesystems.
- Implement metadata verifiers for local format inode fork data.
- Online scrub now cross-references metadata records with other
metadata.
- Refactor the fs geometry ioctl generation functions.
- Harden various metadata verifiers.
- Fix various accounting problems.
- Fix uncancelled transactions leaking when xattr functions fail.
- Prevent the copy-on-write speculative preallocation garbage
collector from racing with writeback.
- Emit log reservation type information as trace data so that we can
compare against xfsprogs.
- Fix some erroneous asserts in the online scrub code.
- Clean up the transaction reservation calculations.
- Fix various minor bugs in online scrub.
- Log complaints about mixed dio/buffered writes once per day and
less noisily than before.
- Refactor buffer log item lists to use list_head.
- Break PNFS leases before reflinking blocks.
- Reduce lock contention on reflink source files.
- Fix some quota accounting problems with reflink.
- Fix a serious corruption problem in the direct cow write code where
we fed bad iomaps to the vfs iomap consumers.
- Various other refactorings.
- Remove EXPERIMENTAL tag from reflink!"
* tag 'xfs-4.16-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (94 commits)
xfs: remove experimental tag for reflinks
xfs: don't screw up direct writes when freesp is fragmented
xfs: check reflink allocation mappings
iomap: warn on zero-length mappings
xfs: treat CoW fork operations as delalloc for quota accounting
xfs: only grab shared inode locks for source file during reflink
xfs: allow xfs_lock_two_inodes to take different EXCL/SHARED modes
xfs: reflink should break pnfs leases before sharing blocks
xfs: don't clobber inobt/finobt cursors when xref with rmap
xfs: skip CoW writes past EOF when writeback races with truncate
xfs: preserve i_rdev when recycling a reclaimable inode
xfs: refactor accounting updates out of xfs_bmap_btalloc
xfs: refactor inode verifier corruption error printing
xfs: make tracepoint inode number format consistent
xfs: always zero di_flags2 when we free the inode
xfs: call xfs_qm_dqattach before performing reflink operations
xfs: bmap code cleanup
Use list_head infra-structure for buffer's log items list
Split buffer's b_fspriv field
Get rid of xfs_buf_log_item_t typedef
...
Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.c')
-rw-r--r-- | fs/xfs/libxfs/xfs_alloc.c | 124 |
1 files changed, 79 insertions, 45 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 83ed7715f856..c02781a4c091 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -167,7 +167,7 @@ xfs_alloc_lookup_ge( * Lookup the first record less than or equal to [bno, len] * in the btree given by cur. */ -static int /* error */ +int /* error */ xfs_alloc_lookup_le( struct xfs_btree_cur *cur, /* btree cursor */ xfs_agblock_t bno, /* starting block of extent */ @@ -520,7 +520,7 @@ xfs_alloc_fixup_trees( return 0; } -static bool +static xfs_failaddr_t xfs_agfl_verify( struct xfs_buf *bp) { @@ -528,10 +528,19 @@ xfs_agfl_verify( struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp); int i; + /* + * There is no verification of non-crc AGFLs because mkfs does not + * initialise the AGFL to zero or NULL. Hence the only valid part of the + * AGFL is what the AGF says is active. We can't get to the AGF, so we + * can't verify just those entries are valid. + */ + if (!xfs_sb_version_hascrc(&mp->m_sb)) + return NULL; + if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid)) - return false; + return __this_address; if (be32_to_cpu(agfl->agfl_magicnum) != XFS_AGFL_MAGIC) - return false; + return __this_address; /* * during growfs operations, the perag is not fully initialised, * so we can't use it for any useful checking. growfs ensures we can't @@ -539,16 +548,17 @@ xfs_agfl_verify( * so we can detect and avoid this problem. */ if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno) - return false; + return __this_address; for (i = 0; i < XFS_AGFL_SIZE(mp); i++) { if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK && be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks) - return false; + return __this_address; } - return xfs_log_check_lsn(mp, - be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn)); + if (!xfs_log_check_lsn(mp, be64_to_cpu(XFS_BUF_TO_AGFL(bp)->agfl_lsn))) + return __this_address; + return NULL; } static void @@ -556,6 +566,7 @@ xfs_agfl_read_verify( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_target->bt_mount; + xfs_failaddr_t fa; /* * There is no verification of non-crc AGFLs because mkfs does not @@ -567,28 +578,29 @@ xfs_agfl_read_verify( return; if (!xfs_buf_verify_cksum(bp, XFS_AGFL_CRC_OFF)) - xfs_buf_ioerror(bp, -EFSBADCRC); - else if (!xfs_agfl_verify(bp)) - xfs_buf_ioerror(bp, -EFSCORRUPTED); - - if (bp->b_error) - xfs_verifier_error(bp); + xfs_verifier_error(bp, -EFSBADCRC, __this_address); + else { + fa = xfs_agfl_verify(bp); + if (fa) + xfs_verifier_error(bp, -EFSCORRUPTED, fa); + } } static void xfs_agfl_write_verify( struct xfs_buf *bp) { - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_buf_log_item *bip = bp->b_fspriv; + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_buf_log_item *bip = bp->b_log_item; + xfs_failaddr_t fa; /* no verification of non-crc AGFLs */ if (!xfs_sb_version_hascrc(&mp->m_sb)) return; - if (!xfs_agfl_verify(bp)) { - xfs_buf_ioerror(bp, -EFSCORRUPTED); - xfs_verifier_error(bp); + fa = xfs_agfl_verify(bp); + if (fa) { + xfs_verifier_error(bp, -EFSCORRUPTED, fa); return; } @@ -602,6 +614,7 @@ const struct xfs_buf_ops xfs_agfl_buf_ops = { .name = "xfs_agfl", .verify_read = xfs_agfl_read_verify, .verify_write = xfs_agfl_write_verify, + .verify_struct = xfs_agfl_verify, }; /* @@ -2397,19 +2410,19 @@ xfs_alloc_put_freelist( return 0; } -static bool +static xfs_failaddr_t xfs_agf_verify( - struct xfs_mount *mp, - struct xfs_buf *bp) - { - struct xfs_agf *agf = XFS_BUF_TO_AGF(bp); + struct xfs_buf *bp) +{ + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_agf *agf = XFS_BUF_TO_AGF(bp); if (xfs_sb_version_hascrc(&mp->m_sb)) { if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid)) - return false; + return __this_address; if (!xfs_log_check_lsn(mp, be64_to_cpu(XFS_BUF_TO_AGF(bp)->agf_lsn))) - return false; + return __this_address; } if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) && @@ -2418,18 +2431,18 @@ xfs_agf_verify( be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) && be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) && be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp))) - return false; + return __this_address; if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS || be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > XFS_BTREE_MAXLEVELS) - return false; + return __this_address; if (xfs_sb_version_hasrmapbt(&mp->m_sb) && (be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) < 1 || be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > XFS_BTREE_MAXLEVELS)) - return false; + return __this_address; /* * during growfs operations, the perag is not fully initialised, @@ -2438,18 +2451,18 @@ xfs_agf_verify( * so we can detect and avoid this problem. */ if (bp->b_pag && be32_to_cpu(agf->agf_seqno) != bp->b_pag->pag_agno) - return false; + return __this_address; if (xfs_sb_version_haslazysbcount(&mp->m_sb) && be32_to_cpu(agf->agf_btreeblks) > be32_to_cpu(agf->agf_length)) - return false; + return __this_address; if (xfs_sb_version_hasreflink(&mp->m_sb) && (be32_to_cpu(agf->agf_refcount_level) < 1 || be32_to_cpu(agf->agf_refcount_level) > XFS_BTREE_MAXLEVELS)) - return false; + return __this_address; - return true;; + return NULL; } @@ -2458,28 +2471,29 @@ xfs_agf_read_verify( struct xfs_buf *bp) { struct xfs_mount *mp = bp->b_target->bt_mount; + xfs_failaddr_t fa; if (xfs_sb_version_hascrc(&mp->m_sb) && !xfs_buf_verify_cksum(bp, XFS_AGF_CRC_OFF)) - xfs_buf_ioerror(bp, -EFSBADCRC); - else if (XFS_TEST_ERROR(!xfs_agf_verify(mp, bp), mp, - XFS_ERRTAG_ALLOC_READ_AGF)) - xfs_buf_ioerror(bp, -EFSCORRUPTED); - - if (bp->b_error) - xfs_verifier_error(bp); + xfs_verifier_error(bp, -EFSBADCRC, __this_address); + else { + fa = xfs_agf_verify(bp); + if (XFS_TEST_ERROR(fa, mp, XFS_ERRTAG_ALLOC_READ_AGF)) + xfs_verifier_error(bp, -EFSCORRUPTED, fa); + } } static void xfs_agf_write_verify( struct xfs_buf *bp) { - struct xfs_mount *mp = bp->b_target->bt_mount; - struct xfs_buf_log_item *bip = bp->b_fspriv; + struct xfs_mount *mp = bp->b_target->bt_mount; + struct xfs_buf_log_item *bip = bp->b_log_item; + xfs_failaddr_t fa; - if (!xfs_agf_verify(mp, bp)) { - xfs_buf_ioerror(bp, -EFSCORRUPTED); - xfs_verifier_error(bp); + fa = xfs_agf_verify(bp); + if (fa) { + xfs_verifier_error(bp, -EFSCORRUPTED, fa); return; } @@ -2496,6 +2510,7 @@ const struct xfs_buf_ops xfs_agf_buf_ops = { .name = "xfs_agf", .verify_read = xfs_agf_read_verify, .verify_write = xfs_agf_write_verify, + .verify_struct = xfs_agf_verify, }; /* @@ -2981,3 +2996,22 @@ xfs_verify_fsbno( return false; return xfs_verify_agbno(mp, agno, XFS_FSB_TO_AGBNO(mp, fsbno)); } + +/* Is there a record covering a given extent? */ +int +xfs_alloc_has_record( + struct xfs_btree_cur *cur, + xfs_agblock_t bno, + xfs_extlen_t len, + bool *exists) +{ + union xfs_btree_irec low; + union xfs_btree_irec high; + + memset(&low, 0, sizeof(low)); + low.a.ar_startblock = bno; + memset(&high, 0xFF, sizeof(high)); + high.a.ar_startblock = bno + len - 1; + + return xfs_btree_has_record(cur, &low, &high, exists); +} |