diff options
| author | Lachlan McIlroy | 2007-05-08 05:50:19 +0200 |
|---|---|---|
| committer | Tim Shimmin | 2007-05-08 05:50:19 +0200 |
| commit | f7c66ce3f70d8417de0cfb481ca4e5430382ec5d (patch) | |
| tree | c9b4d5cb09a9241cb305532edfbd703cd181530d /fs/xfs/xfs_vnodeops.c | |
| parent | [XFS] Fix race in xfs_write() b/w dmapi callout and direct I/O checks. (diff) | |
| download | kernel-qcow2-linux-f7c66ce3f70d8417de0cfb481ca4e5430382ec5d.tar.gz kernel-qcow2-linux-f7c66ce3f70d8417de0cfb481ca4e5430382ec5d.tar.xz kernel-qcow2-linux-f7c66ce3f70d8417de0cfb481ca4e5430382ec5d.zip | |
[XFS] Add lockdep support for XFS
SGI-PV: 963965
SGI-Modid: xfs-linux-melb:xfs-kern:28485a
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
| -rw-r--r-- | fs/xfs/xfs_vnodeops.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index e2c9bbc27823..de17aed578f0 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1947,7 +1947,7 @@ xfs_create( goto error_return; } - xfs_ilock(dp, XFS_ILOCK_EXCL); + xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); XFS_BMAP_INIT(&free_list, &first_block); @@ -2141,7 +2141,7 @@ xfs_lock_dir_and_entry( attempts = 0; again: - xfs_ilock(dp, XFS_ILOCK_EXCL); + xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); e_inum = ip->i_ino; @@ -2210,6 +2210,21 @@ int xfs_lock_delays; #endif /* + * Bump the subclass so xfs_lock_inodes() acquires each lock with + * a different value + */ +static inline int +xfs_lock_inumorder(int lock_mode, int subclass) +{ + if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) + lock_mode |= (subclass + XFS_IOLOCK_INUMORDER) << XFS_IOLOCK_SHIFT; + if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)) + lock_mode |= (subclass + XFS_ILOCK_INUMORDER) << XFS_ILOCK_SHIFT; + + return lock_mode; +} + +/* * The following routine will lock n inodes in exclusive mode. * We assume the caller calls us with the inodes in i_ino order. * @@ -2276,7 +2291,7 @@ again: * that is in the AIL. */ ASSERT(i != 0); - if (!xfs_ilock_nowait(ips[i], lock_mode)) { + if (!xfs_ilock_nowait(ips[i], xfs_lock_inumorder(lock_mode, i))) { attempts++; /* @@ -2311,7 +2326,7 @@ again: goto again; } } else { - xfs_ilock(ips[i], lock_mode); + xfs_ilock(ips[i], xfs_lock_inumorder(lock_mode, i)); } } @@ -2845,7 +2860,7 @@ xfs_mkdir( goto error_return; } - xfs_ilock(dp, XFS_ILOCK_EXCL); + xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); /* * Check for directory link count overflow. @@ -3399,7 +3414,7 @@ xfs_symlink( goto error_return; } - xfs_ilock(dp, XFS_ILOCK_EXCL); + xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT); /* * Check whether the directory allows new symlinks or not. |