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xfs: move transaction handling to xfs_bmapi_convert_delalloc

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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>
This commit is contained in:
Christoph Hellwig 2019-02-15 08:02:49 -08:00 committed by Darrick J. Wong
parent d8ae82e394
commit 491ce61e93
3 changed files with 40 additions and 35 deletions
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38
fs/xfs/libxfs/xfs_bmap.c
View File

@ -4446,16 +4446,30 @@ xfs_bmapi_write(
*/
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;
}

5
fs/xfs/libxfs/xfs_bmap.h
View File

@ -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(

32
fs/xfs/xfs_iomap.c
View File

@ -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);
error = xfs_bmapi_convert_delalloc(ip, whichfork, offset_fsb,
imap, seq);
if (error)
goto trans_cancel;
error = xfs_trans_commit(tp);
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