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xfs: make xfs_buf_alloc return an error code

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Convert _xfs_buf_alloc() to return numeric error codes like most
everywhere else in xfs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2020-01-23 17:01:15 -08:00
parent b3531f5fc1
commit 32dff5e5d1
1 changed files with 12 additions and 9 deletions
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21
fs/xfs/xfs_buf.c
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@ -198,20 +198,22 @@ xfs_buf_free_maps(
} }
} }
static struct xfs_buf * static int
_xfs_buf_alloc( _xfs_buf_alloc(
struct xfs_buftarg *target, struct xfs_buftarg *target,
struct xfs_buf_map *map, struct xfs_buf_map *map,
int nmaps, int nmaps,
xfs_buf_flags_t flags) xfs_buf_flags_t flags,
struct xfs_buf **bpp)
{ {
struct xfs_buf *bp; struct xfs_buf *bp;
int error; int error;
int i; int i;
*bpp = NULL;
bp = kmem_zone_zalloc(xfs_buf_zone, KM_NOFS); bp = kmem_zone_zalloc(xfs_buf_zone, KM_NOFS);
if (unlikely(!bp)) if (unlikely(!bp))
return NULL; return -ENOMEM;
/* /*
* We don't want certain flags to appear in b_flags unless they are * We don't want certain flags to appear in b_flags unless they are
@ -239,7 +241,7 @@ _xfs_buf_alloc(
error = xfs_buf_get_maps(bp, nmaps); error = xfs_buf_get_maps(bp, nmaps);
if (error) { if (error) {
kmem_cache_free(xfs_buf_zone, bp); kmem_cache_free(xfs_buf_zone, bp);
return NULL; return error;
} }
bp->b_bn = map[0].bm_bn; bp->b_bn = map[0].bm_bn;
@ -256,7 +258,8 @@ _xfs_buf_alloc(
XFS_STATS_INC(bp->b_mount, xb_create); XFS_STATS_INC(bp->b_mount, xb_create);
trace_xfs_buf_init(bp, _RET_IP_); trace_xfs_buf_init(bp, _RET_IP_);
return bp; *bpp = bp;
return 0;
} }
/* /*
@ -715,8 +718,8 @@ xfs_buf_get_map(
return NULL; return NULL;
} }
new_bp = _xfs_buf_alloc(target, map, nmaps, flags); error = _xfs_buf_alloc(target, map, nmaps, flags, &new_bp);
if (unlikely(!new_bp)) if (error)
return NULL; return NULL;
error = xfs_buf_allocate_memory(new_bp, flags); error = xfs_buf_allocate_memory(new_bp, flags);
@ -917,8 +920,8 @@ xfs_buf_get_uncached(
DEFINE_SINGLE_BUF_MAP(map, XFS_BUF_DADDR_NULL, numblks); DEFINE_SINGLE_BUF_MAP(map, XFS_BUF_DADDR_NULL, numblks);
/* flags might contain irrelevant bits, pass only what we care about */ /* flags might contain irrelevant bits, pass only what we care about */
bp = _xfs_buf_alloc(target, &map, 1, flags & XBF_NO_IOACCT); error = _xfs_buf_alloc(target, &map, 1, flags & XBF_NO_IOACCT, &bp);
if (unlikely(bp == NULL)) if (error)
goto fail; goto fail;
page_count = PAGE_ALIGN(numblks << BBSHIFT) >> PAGE_SHIFT; page_count = PAGE_ALIGN(numblks << BBSHIFT) >> PAGE_SHIFT;