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| author | Christoph Hellwig <hch@infradead.org> | 2013-10-14 07:09:35 -0700 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-10-21 16:51:33 -0500 |
| commit | 76ca4c238cf5858f8ba5bcd24c94c23717f1e14e (patch) | |
| tree | 8059d74fc74e68a6f8765ce5f65247ba319117bd /fs/xfs/xfs_iops.c | |
| parent | 59e5a0e821d838854b3afd030d31f82cee3ecd58 (diff) | |
| download | linux-rpi3-76ca4c238cf5858f8ba5bcd24c94c23717f1e14e.tar.gz linux-rpi3-76ca4c238cf5858f8ba5bcd24c94c23717f1e14e.tar.bz2 linux-rpi3-76ca4c238cf5858f8ba5bcd24c94c23717f1e14e.zip | |
xfs: always take the iolock around xfs_setattr_size
There is no reason to conditionally take the iolock inside xfs_setattr_size
when we can let the caller handle it unconditionally, which just incrases
the lock hold time for the case where it was previously taken internally
by a few instructions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
| -rw-r--r-- | fs/xfs/xfs_iops.c | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 2b8952d9199b..52ecd1ccec9f 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -709,8 +709,7 @@ out_dqrele: int xfs_setattr_size( struct xfs_inode *ip, - struct iattr *iattr, - int flags) + struct iattr *iattr) { struct xfs_mount *mp = ip->i_mount; struct inode *inode = VFS_I(ip); @@ -733,15 +732,11 @@ xfs_setattr_size( if (error) return XFS_ERROR(error); + ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); ASSERT(S_ISREG(ip->i_d.di_mode)); ASSERT((mask & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); - if (!(flags & XFS_ATTR_NOLOCK)) { - lock_flags |= XFS_IOLOCK_EXCL; - xfs_ilock(ip, lock_flags); - } - oldsize = inode->i_size; newsize = iattr->ia_size; @@ -750,12 +745,11 @@ xfs_setattr_size( */ if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { if (!(mask & (ATTR_CTIME|ATTR_MTIME))) - goto out_unlock; + return 0; /* * Use the regular setattr path to update the timestamps. */ - xfs_iunlock(ip, lock_flags); iattr->ia_valid &= ~ATTR_SIZE; return xfs_setattr_nonsize(ip, iattr, 0); } @@ -765,7 +759,7 @@ xfs_setattr_size( */ error = xfs_qm_dqattach(ip, 0); if (error) - goto out_unlock; + return error; /* * Now we can make the changes. Before we join the inode to the @@ -783,7 +777,7 @@ xfs_setattr_size( */ error = xfs_zero_eof(ip, newsize, oldsize); if (error) - goto out_unlock; + return error; } /* @@ -802,7 +796,7 @@ xfs_setattr_size( error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, ip->i_d.di_size, newsize); if (error) - goto out_unlock; + return error; } /* @@ -812,7 +806,7 @@ xfs_setattr_size( error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); if (error) - goto out_unlock; + return error; tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); @@ -916,12 +910,21 @@ out_trans_cancel: STATIC int xfs_vn_setattr( - struct dentry *dentry, - struct iattr *iattr) + struct dentry *dentry, + struct iattr *iattr) { - if (iattr->ia_valid & ATTR_SIZE) - return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0); - return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0); + struct xfs_inode *ip = XFS_I(dentry->d_inode); + int error; + + if (iattr->ia_valid & ATTR_SIZE) { + xfs_ilock(ip, XFS_IOLOCK_EXCL); + error = xfs_setattr_size(ip, iattr); + xfs_iunlock(ip, XFS_IOLOCK_EXCL); + } else { + error = xfs_setattr_nonsize(ip, iattr, 0); + } + + return -error; } STATIC int |