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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 09:53:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 09:53:35 -0700 |
commit | 0e6acf0204da5b8705722a5f6806a4f55ed379d6 (patch) | |
tree | 4a8a9bf9daba9c734a0fdde417ae1cb472ca396d /fs/xfs/libxfs/xfs_alloc.c | |
parent | 0e06f5c0deeef0332a5da2ecb8f1fcf3e024d958 (diff) | |
parent | f2bdfda9a1c668539bc85baf5625f6f14bc510b1 (diff) | |
download | linux-next-0e6acf0204da5b8705722a5f6806a4f55ed379d6.tar.gz |
Merge tag 'xfs-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
Pull xfs updates from Dave Chinner:
"The major addition is the new iomap based block mapping
infrastructure. We've been kicking this about locally for years, but
there are other filesystems want to use it too (e.g. gfs2). Now it
is fully working, reviewed and ready for merge and be used by other
filesystems.
There are a lot of other fixes and cleanups in the tree, but those are
XFS internal things and none are of the scale or visibility of the
iomap changes. See below for details.
I am likely to send another pull request next week - we're just about
ready to merge some new functionality (on disk block->owner reverse
mapping infrastructure), but that's a huge chunk of code (74 files
changed, 7283 insertions(+), 1114 deletions(-)) so I'm keeping that
separate to all the "normal" pull request changes so they don't get
lost in the noise.
Summary of changes in this update:
- generic iomap based IO path infrastructure
- generic iomap based fiemap implementation
- xfs iomap based Io path implementation
- buffer error handling fixes
- tracking of in flight buffer IO for unmount serialisation
- direct IO and DAX io path separation and simplification
- shortform directory format definition changes for wider platform
compatibility
- various buffer cache fixes
- cleanups in preparation for rmap merge
- error injection cleanups and fixes
- log item format buffer memory allocation restructuring to prevent
rare OOM reclaim deadlocks
- sparse inode chunks are now fully supported"
* tag 'xfs-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (53 commits)
xfs: remove EXPERIMENTAL tag from sparse inode feature
xfs: bufferhead chains are invalid after end_page_writeback
xfs: allocate log vector buffers outside CIL context lock
libxfs: directory node splitting does not have an extra block
xfs: remove dax code from object file when disabled
xfs: skip dirty pages in ->releasepage()
xfs: remove __arch_pack
xfs: kill xfs_dir2_inou_t
xfs: kill xfs_dir2_sf_off_t
xfs: split direct I/O and DAX path
xfs: direct calls in the direct I/O path
xfs: stop using generic_file_read_iter for direct I/O
xfs: split xfs_file_read_iter into buffered and direct I/O helpers
xfs: remove s_maxbytes enforcement in xfs_file_read_iter
xfs: kill ioflags
xfs: don't pass ioflags around in the ioctl path
xfs: track and serialize in-flight async buffers against unmount
xfs: exclude never-released buffers from buftarg I/O accounting
xfs: don't reset b_retries to 0 on every failure
xfs: remove extraneous buffer flag changes
...
Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.c')
-rw-r--r-- | fs/xfs/libxfs/xfs_alloc.c | 101 |
1 files changed, 57 insertions, 44 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index a708e38b494c..88c26b827a2d 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -84,7 +84,7 @@ xfs_alloc_lookup_ge( * Lookup the first record less than or equal to [bno, len] * in the btree given by cur. */ -int /* error */ +static int /* error */ xfs_alloc_lookup_le( struct xfs_btree_cur *cur, /* btree cursor */ xfs_agblock_t bno, /* starting block of extent */ @@ -1839,19 +1839,8 @@ void xfs_alloc_compute_maxlevels( xfs_mount_t *mp) /* file system mount structure */ { - int level; - uint maxblocks; - uint maxleafents; - int minleafrecs; - int minnoderecs; - - maxleafents = (mp->m_sb.sb_agblocks + 1) / 2; - minleafrecs = mp->m_alloc_mnr[0]; - minnoderecs = mp->m_alloc_mnr[1]; - maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; - for (level = 1; maxblocks > 1; level++) - maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; - mp->m_ag_maxlevels = level; + mp->m_ag_maxlevels = xfs_btree_compute_maxlevels(mp, mp->m_alloc_mnr, + (mp->m_sb.sb_agblocks + 1) / 2); } /* @@ -2658,55 +2647,79 @@ error0: return error; } -/* - * Free an extent. - * Just break up the extent address and hand off to xfs_free_ag_extent - * after fixing up the freelist. - */ -int /* error */ -xfs_free_extent( - xfs_trans_t *tp, /* transaction pointer */ - xfs_fsblock_t bno, /* starting block number of extent */ - xfs_extlen_t len) /* length of extent */ +/* Ensure that the freelist is at full capacity. */ +int +xfs_free_extent_fix_freelist( + struct xfs_trans *tp, + xfs_agnumber_t agno, + struct xfs_buf **agbp) { - xfs_alloc_arg_t args; - int error; + struct xfs_alloc_arg args; + int error; - ASSERT(len != 0); - memset(&args, 0, sizeof(xfs_alloc_arg_t)); + memset(&args, 0, sizeof(struct xfs_alloc_arg)); args.tp = tp; args.mp = tp->t_mountp; + args.agno = agno; /* * validate that the block number is legal - the enables us to detect * and handle a silent filesystem corruption rather than crashing. */ - args.agno = XFS_FSB_TO_AGNO(args.mp, bno); if (args.agno >= args.mp->m_sb.sb_agcount) return -EFSCORRUPTED; - args.agbno = XFS_FSB_TO_AGBNO(args.mp, bno); - if (args.agbno >= args.mp->m_sb.sb_agblocks) - return -EFSCORRUPTED; - args.pag = xfs_perag_get(args.mp, args.agno); ASSERT(args.pag); error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING); if (error) - goto error0; + goto out; + + *agbp = args.agbp; +out: + xfs_perag_put(args.pag); + return error; +} + +/* + * Free an extent. + * Just break up the extent address and hand off to xfs_free_ag_extent + * after fixing up the freelist. + */ +int /* error */ +xfs_free_extent( + struct xfs_trans *tp, /* transaction pointer */ + xfs_fsblock_t bno, /* starting block number of extent */ + xfs_extlen_t len) /* length of extent */ +{ + struct xfs_mount *mp = tp->t_mountp; + struct xfs_buf *agbp; + xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, bno); + xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp, bno); + int error; + + ASSERT(len != 0); + + error = xfs_free_extent_fix_freelist(tp, agno, &agbp); + if (error) + return error; + + XFS_WANT_CORRUPTED_GOTO(mp, agbno < mp->m_sb.sb_agblocks, err); /* validate the extent size is legal now we have the agf locked */ - if (args.agbno + len > - be32_to_cpu(XFS_BUF_TO_AGF(args.agbp)->agf_length)) { - error = -EFSCORRUPTED; - goto error0; - } + XFS_WANT_CORRUPTED_GOTO(mp, + agbno + len <= be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_length), + err); - error = xfs_free_ag_extent(tp, args.agbp, args.agno, args.agbno, len, 0); - if (!error) - xfs_extent_busy_insert(tp, args.agno, args.agbno, len, 0); -error0: - xfs_perag_put(args.pag); + error = xfs_free_ag_extent(tp, agbp, agno, agbno, len, 0); + if (error) + goto err; + + xfs_extent_busy_insert(tp, agno, agbno, len, 0); + return 0; + +err: + xfs_trans_brelse(tp, agbp); return error; } |