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xfs: factor out two helpers from xfs_bmapi_write

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We want to be able to reuse them for the upcoming dedidcated delalloc
convert routine.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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 08:02:48 -08:00 committed by Darrick J. Wong
parent b101e3342a
commit c8b54673b3
1 changed files with 44 additions and 34 deletions
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78
fs/xfs/libxfs/xfs_bmap.c
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@ -4194,6 +4194,44 @@ xfs_bmapi_convert_unwritten(
return 0;
}
static inline xfs_extlen_t
xfs_bmapi_minleft(
struct xfs_trans *tp,
struct xfs_inode *ip,
int fork)
{
if (tp && tp->t_firstblock != NULLFSBLOCK)
return 0;
if (XFS_IFORK_FORMAT(ip, fork) != XFS_DINODE_FMT_BTREE)
return 1;
return be16_to_cpu(XFS_IFORK_PTR(ip, fork)->if_broot->bb_level) + 1;
}
/*
* Log whatever the flags say, even if error. Otherwise we might miss detecting
* a case where the data is changed, there's an error, and it's not logged so we
* don't shutdown when we should. Don't bother logging extents/btree changes if
* we converted to the other format.
*/
static void
xfs_bmapi_finish(
struct xfs_bmalloca *bma,
int whichfork,
int error)
{
if ((bma->logflags & xfs_ilog_fext(whichfork)) &&
XFS_IFORK_FORMAT(bma->ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
bma->logflags &= ~xfs_ilog_fext(whichfork);
else if ((bma->logflags & xfs_ilog_fbroot(whichfork)) &&
XFS_IFORK_FORMAT(bma->ip, whichfork) != XFS_DINODE_FMT_BTREE)
bma->logflags &= ~xfs_ilog_fbroot(whichfork);
if (bma->logflags)
xfs_trans_log_inode(bma->tp, bma->ip, bma->logflags);
if (bma->cur)
xfs_btree_del_cursor(bma->cur, error);
}
/*
* Map file blocks to filesystem blocks, and allocate blocks or convert the
* extent state if necessary. Details behaviour is controlled by the flags
@ -4273,15 +4311,6 @@ xfs_bmapi_write(
XFS_STATS_INC(mp, xs_blk_mapw);
if (!tp || tp->t_firstblock == NULLFSBLOCK) {
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
else
bma.minleft = 1;
} else {
bma.minleft = 0;
}
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
error = xfs_iread_extents(tp, ip, whichfork);
if (error)
@ -4296,6 +4325,7 @@ xfs_bmapi_write(
bma.ip = ip;
bma.total = total;
bma.datatype = 0;
bma.minleft = xfs_bmapi_minleft(tp, ip, whichfork);
/*
* The delalloc flag means the caller wants to allocate the entire
@ -4434,32 +4464,12 @@ xfs_bmapi_write(
ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
XFS_IFORK_NEXTENTS(ip, whichfork) >
XFS_IFORK_MAXEXT(ip, whichfork));
error = 0;
xfs_bmapi_finish(&bma, whichfork, 0);
xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
orig_nmap, *nmap);
return 0;
error0:
/*
* Log everything. Do this after conversion, there's no point in
* logging the extent records if we've converted to btree format.
*/
if ((bma.logflags & xfs_ilog_fext(whichfork)) &&
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
bma.logflags &= ~xfs_ilog_fext(whichfork);
else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) &&
XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
bma.logflags &= ~xfs_ilog_fbroot(whichfork);
/*
* Log whatever the flags say, even if error. Otherwise we might miss
* detecting a case where the data is changed, there's an error,
* and it's not logged so we don't shutdown when we should.
*/
if (bma.logflags)
xfs_trans_log_inode(tp, ip, bma.logflags);
if (bma.cur) {
xfs_btree_del_cursor(bma.cur, error);
}
if (!error)
xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
orig_nmap, *nmap);
xfs_bmapi_finish(&bma, whichfork, error);
return error;
}