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authorChristoph Hellwig <hch@infradead.org>2010-06-14 05:17:31 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-09 16:47:42 -0400
commitfa9b227e9019ebaeeb06224ba531a490f91144b3 (patch)
treeff3644c6572d2b22db0d8b71f1a79ae0ad33d102 /fs/xfs/xfs_vnodeops.c
parent2f246fd0f126f3b3c23a4e6b7109350e83356bd6 (diff)
downloadop-kernel-dev-fa9b227e9019ebaeeb06224ba531a490f91144b3.zip
op-kernel-dev-fa9b227e9019ebaeeb06224ba531a490f91144b3.tar.gz
xfs: new truncate sequence
Convert XFS to the new truncate sequence. We still can have errors after updating the file size in xfs_setattr, but these are real I/O errors and lead to a transaction abort and filesystem shutdown, so they are not an issue. Errors from ->write_begin and write_end can now be handled correctly because we can actually get rid of the delalloc extents while previous the buffer state was stipped in block_invalidatepage. There is still no error handling for ->direct_IO, because doing so will need some major restructuring given that we only have the iolock shared and do not hold i_mutex at all. Fortunately leaving the normally allocated blocks behind there is not a major issue and this will get cleaned up by xfs_free_eofblock later. Note: the patch is against Al's vfs.git tree as that contains the nessecary preparations. I'd prefer to get it applied there so that we can get some testing in linux-next. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c38
1 files changed, 20 insertions, 18 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 3ac137d..66d585c 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -221,8 +221,11 @@ xfs_setattr(
* transaction to modify the i_size.
*/
code = xfs_zero_eof(ip, iattr->ia_size, ip->i_size);
+ if (code)
+ goto error_return;
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ lock_flags &= ~XFS_ILOCK_EXCL;
/*
* We are going to log the inode size change in this
@@ -236,36 +239,35 @@ xfs_setattr(
* really care about here and prevents waiting for other data
* not within the range we care about here.
*/
- if (!code &&
- ip->i_size != ip->i_d.di_size &&
+ if (ip->i_size != ip->i_d.di_size &&
iattr->ia_size > ip->i_d.di_size) {
code = xfs_flush_pages(ip,
ip->i_d.di_size, iattr->ia_size,
XBF_ASYNC, FI_NONE);
+ if (code)
+ goto error_return;
}
/* wait for all I/O to complete */
xfs_ioend_wait(ip);
- if (!code)
- code = xfs_itruncate_data(ip, iattr->ia_size);
- if (code) {
- ASSERT(tp == NULL);
- lock_flags &= ~XFS_ILOCK_EXCL;
- ASSERT(lock_flags == XFS_IOLOCK_EXCL || !need_iolock);
+ code = -block_truncate_page(inode->i_mapping, iattr->ia_size,
+ xfs_get_blocks);
+ if (code)
goto error_return;
- }
+
tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
- if ((code = xfs_trans_reserve(tp, 0,
- XFS_ITRUNCATE_LOG_RES(mp), 0,
- XFS_TRANS_PERM_LOG_RES,
- XFS_ITRUNCATE_LOG_COUNT))) {
- xfs_trans_cancel(tp, 0);
- if (need_iolock)
- xfs_iunlock(ip, XFS_IOLOCK_EXCL);
- return code;
- }
+ code = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES,
+ XFS_ITRUNCATE_LOG_COUNT);
+ if (code)
+ goto error_return;
+
+ truncate_setsize(inode, iattr->ia_size);
+
commit_flags = XFS_TRANS_RELEASE_LOG_RES;
+ lock_flags |= XFS_ILOCK_EXCL;
+
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip);
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