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| author | Brian Foster <bfoster@redhat.com> | 2012-11-06 09:50:42 -0500 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-11-08 15:25:40 -0600 |
| commit | 41176a68e3f710630feace536d0277a092e206b5 (patch) | |
| tree | b1452aae0f00c37ff769e9f4620aa3936e70b837 | |
| parent | 40165e27617e2a98bf8588001d2f2872fae2fee2 (diff) | |
| download | linux-stable-41176a68e3f710630feace536d0277a092e206b5.tar.gz linux-stable-41176a68e3f710630feace536d0277a092e206b5.tar.bz2 linux-stable-41176a68e3f710630feace536d0277a092e206b5.zip | |
xfs: create function to scan and clear EOFBLOCKS inodes
xfs_inodes_free_eofblocks() implements scanning functionality for
EOFBLOCKS inodes. It uses the AG iterator to walk the tagged inodes
and free post-EOF blocks via the xfs_inode_free_eofblocks() execute
function. The scan can be invoked in best-effort mode or wait
(force) mode.
A best-effort scan (default) handles all inodes that do not have a
dirty cache and we successfully acquire the io lock via trylock. In
wait mode, we continue to cycle through an AG until all inodes are
handled.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
| -rw-r--r-- | fs/xfs/xfs_icache.c | 43 | ||||
| -rw-r--r-- | fs/xfs/xfs_icache.h | 1 | ||||
| -rw-r--r-- | fs/xfs/xfs_trace.h | 1 |
3 files changed, 45 insertions, 0 deletions
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 2a96dc48ebe6..d115cb44b103 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -1170,6 +1170,49 @@ xfs_reclaim_inodes_count( return reclaimable; } +STATIC int +xfs_inode_free_eofblocks( + struct xfs_inode *ip, + struct xfs_perag *pag, + int flags, + void *args) +{ + int ret; + + if (!xfs_can_free_eofblocks(ip, false)) { + /* inode could be preallocated or append-only */ + trace_xfs_inode_free_eofblocks_invalid(ip); + xfs_inode_clear_eofblocks_tag(ip); + return 0; + } + + /* + * If the mapping is dirty the operation can block and wait for some + * time. Unless we are waiting, skip it. + */ + if (!(flags & SYNC_WAIT) && + mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY)) + return 0; + + ret = xfs_free_eofblocks(ip->i_mount, ip, true); + + /* don't revisit the inode if we're not waiting */ + if (ret == EAGAIN && !(flags & SYNC_WAIT)) + ret = 0; + + return ret; +} + +int +xfs_icache_free_eofblocks( + struct xfs_mount *mp, + int flags) +{ + ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0); + return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags, + NULL, XFS_ICI_EOFBLOCKS_TAG); +} + void xfs_inode_set_eofblocks_tag( xfs_inode_t *ip) diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h index 54c113478dfc..cb6b8d0eee61 100644 --- a/fs/xfs/xfs_icache.h +++ b/fs/xfs/xfs_icache.h @@ -37,6 +37,7 @@ void xfs_inode_set_reclaim_tag(struct xfs_inode *ip); void xfs_inode_set_eofblocks_tag(struct xfs_inode *ip); void xfs_inode_clear_eofblocks_tag(struct xfs_inode *ip); +int xfs_icache_free_eofblocks(struct xfs_mount *, int); int xfs_sync_inode_grab(struct xfs_inode *ip); int xfs_inode_ag_iterator(struct xfs_mount *mp, diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 6f46e034b766..cb5234632072 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -589,6 +589,7 @@ DEFINE_INODE_EVENT(xfs_dquot_dqdetach); DEFINE_INODE_EVENT(xfs_inode_set_eofblocks_tag); DEFINE_INODE_EVENT(xfs_inode_clear_eofblocks_tag); +DEFINE_INODE_EVENT(xfs_inode_free_eofblocks_invalid); DECLARE_EVENT_CLASS(xfs_iref_class, TP_PROTO(struct xfs_inode *ip, unsigned long caller_ip), |