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authorChristoph Hellwig <hch@lst.de>2019-02-15 08:02:49 -0800
committerDarrick J. Wong <darrick.wong@oracle.com>2019-02-17 11:55:54 -0800
commit491ce61e939f76399e344b0414dc5a4c08c1f0cf (patch)
tree038b4808084057b921d3940bbc110ed649ab71e3
parentd8ae82e394bd5d836a32864b1ca22757ef8bb8ee (diff)
downloadlinux-491ce61e939f76399e344b0414dc5a4c08c1f0cf.tar.bz2
xfs: move transaction handling to xfs_bmapi_convert_delalloc
No need to deal with the transaction and the inode locking in the caller. Note that we also switch to passing whichfork as the second paramter, matching what most related functions do. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
-rw-r--r--fs/xfs/libxfs/xfs_bmap.c38
-rw-r--r--fs/xfs/libxfs/xfs_bmap.h5
-rw-r--r--fs/xfs/xfs_iomap.c32
3 files changed, 40 insertions, 35 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index edab329df83b..e245b5dfee9d 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -4446,16 +4446,30 @@ error0:
*/
int
xfs_bmapi_convert_delalloc(
- struct xfs_trans *tp,
struct xfs_inode *ip,
- xfs_fileoff_t offset_fsb,
int whichfork,
- struct xfs_bmbt_irec *imap)
+ xfs_fileoff_t offset_fsb,
+ struct xfs_bmbt_irec *imap,
+ unsigned int *seq)
{
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
+ struct xfs_mount *mp = ip->i_mount;
struct xfs_bmalloca bma = { NULL };
+ struct xfs_trans *tp;
int error;
+ /*
+ * Space for the extent and indirect blocks was reserved when the
+ * delalloc extent was created so there's no need to do so here.
+ */
+ error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0, 0,
+ XFS_TRANS_RESERVE, &tp);
+ if (error)
+ return error;
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, 0);
+
if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) ||
bma.got.br_startoff > offset_fsb) {
/*
@@ -4464,7 +4478,8 @@ xfs_bmapi_convert_delalloc(
* might have moved the extent to the data fork in the meantime.
*/
WARN_ON_ONCE(whichfork != XFS_COW_FORK);
- return -EAGAIN;
+ error = -EAGAIN;
+ goto out_trans_cancel;
}
/*
@@ -4473,7 +4488,8 @@ xfs_bmapi_convert_delalloc(
*/
if (!isnullstartblock(bma.got.br_startblock)) {
*imap = bma.got;
- return 0;
+ *seq = READ_ONCE(ifp->if_seq);
+ goto out_trans_cancel;
}
bma.tp = tp;
@@ -4502,6 +4518,7 @@ xfs_bmapi_convert_delalloc(
ASSERT(!isnullstartblock(bma.got.br_startblock));
*imap = bma.got;
+ *seq = READ_ONCE(ifp->if_seq);
if (whichfork == XFS_COW_FORK) {
error = xfs_refcount_alloc_cow_extent(tp, bma.blkno,
@@ -4512,8 +4529,19 @@ xfs_bmapi_convert_delalloc(
error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags,
whichfork);
+ if (error)
+ goto out_finish;
+
+ xfs_bmapi_finish(&bma, whichfork, 0);
+ error = xfs_trans_commit(tp);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ return error;
+
out_finish:
xfs_bmapi_finish(&bma, whichfork, error);
+out_trans_cancel:
+ xfs_trans_cancel(tp);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
}
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index b5eca7a26949..78b190b6e908 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -223,8 +223,9 @@ int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
int eof);
-int xfs_bmapi_convert_delalloc(struct xfs_trans *, struct xfs_inode *,
- xfs_fileoff_t, int, struct xfs_bmbt_irec *);
+int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork,
+ xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap,
+ unsigned int *seq);
static inline void
xfs_bmap_add_free(
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index fd3aacd4bf02..39be741cac5a 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -684,11 +684,9 @@ xfs_iomap_write_allocate(
unsigned int *seq)
{
struct xfs_mount *mp = ip->i_mount;
- struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
xfs_fileoff_t offset_fsb;
xfs_fileoff_t map_start_fsb;
xfs_extlen_t map_count_fsb;
- struct xfs_trans *tp;
int error = 0;
/*
@@ -716,17 +714,8 @@ xfs_iomap_write_allocate(
/*
* Allocate in a loop because it may take several attempts to
* allocate real blocks for a contiguous delalloc extent if free
- * space is sufficiently fragmented. Note that space for the
- * extent and indirect blocks was reserved when the delalloc
- * extent was created so there's no need to do so here.
+ * space is sufficiently fragmented.
*/
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0, 0,
- XFS_TRANS_RESERVE, &tp);
- if (error)
- return error;
-
- xfs_ilock(ip, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(tp, ip, 0);
/*
* ilock was dropped since imap was populated which means it
@@ -737,17 +726,10 @@ xfs_iomap_write_allocate(
* caller. We'll trim it down to the caller's most recently
* validated range before we return.
*/
- error = xfs_bmapi_convert_delalloc(tp, ip, offset_fsb,
- whichfork, imap);
- if (error)
- goto trans_cancel;
-
- error = xfs_trans_commit(tp);
+ error = xfs_bmapi_convert_delalloc(ip, whichfork, offset_fsb,
+ imap, seq);
if (error)
- goto error0;
-
- *seq = READ_ONCE(ifp->if_seq);
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ return error;
/*
* See if we were able to allocate an extent that covers at
@@ -766,12 +748,6 @@ xfs_iomap_write_allocate(
return 0;
}
}
-
-trans_cancel:
- xfs_trans_cancel(tp);
-error0:
- xfs_iunlock(ip, XFS_ILOCK_EXCL);
- return error;
}
int