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xfs: simplify xfs_rtallocate_extent 

We can deduce the allocation type from the bno argument, and do the
return without prod much simpler internally.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: fix the macro for the non-rt build]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-02-17 08:21:06 -08:00 committed by Darrick J. Wong
parent 410d17f67e
commit 089ec2f875
3 changed files with 13 additions and 27 deletions
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13
fs/xfs/xfs_bmap_util.c
View File

@ -88,7 +88,6 @@ int
xfs_bmap_rtalloc(
struct xfs_bmalloca *ap) /* bmap alloc argument struct */
{
xfs_alloctype_t atype = 0; /* type for allocation routines */
int error; /* error return value */
xfs_mount_t *mp; /* mount point structure */
xfs_extlen_t prod = 0; /* product factor for allocators */
@ -155,18 +154,14 @@ xfs_bmap_rtalloc(
/*
* Realtime allocation, done through xfs_rtallocate_extent.
*/
atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
do_div(ap->blkno, mp->m_sb.sb_rextsize);
rtb = ap->blkno;
ap->length = ralen;
if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
&ralen, atype, ap->wasdel, prod, &rtb)))
return error;
if (rtb == NULLFSBLOCK && prod > 1 &&
(error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1,
ap->length, &ralen, atype,
ap->wasdel, 1, &rtb)))
error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
&ralen, ap->wasdel, prod, &rtb);
if (error)
return error;
ap->blkno = rtb;
if (ap->blkno != NULLFSBLOCK) {
ap->blkno *= mp->m_sb.sb_rextsize;

24
fs/xfs/xfs_rtalloc.c
View File

@ -1093,7 +1093,6 @@ xfs_rtallocate_extent(
xfs_extlen_t minlen, /* minimum length to allocate */
xfs_extlen_t maxlen, /* maximum length to allocate */
xfs_extlen_t *len, /* out: actual length allocated */
xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */
int wasdel, /* was a delayed allocation extent */
xfs_extlen_t prod, /* extent product factor */
xfs_rtblock_t *rtblock) /* out: start block allocated */
@ -1123,27 +1122,16 @@ xfs_rtallocate_extent(
}
}
retry:
sumbp = NULL;
/*
* Allocate by size, or near another block, or exactly at some block.
*/
switch (type) {
case XFS_ALLOCTYPE_ANY_AG:
if (bno == 0) {
error = xfs_rtallocate_extent_size(mp, tp, minlen, maxlen, len,
&sumbp, &sb, prod, &r);
break;
case XFS_ALLOCTYPE_NEAR_BNO:
} else {
error = xfs_rtallocate_extent_near(mp, tp, bno, minlen, maxlen,
len, &sumbp, &sb, prod, &r);
break;
case XFS_ALLOCTYPE_THIS_BNO:
error = xfs_rtallocate_extent_exact(mp, tp, bno, minlen, maxlen,
len, &sumbp, &sb, prod, &r);
break;
default:
error = -EIO;
ASSERT(0);
}
if (error)
return error;
@ -1158,7 +1146,11 @@ xfs_rtallocate_extent(
xfs_trans_mod_sb(tp, XFS_TRANS_SB_RES_FREXTENTS, -slen);
else
xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, -slen);
} else if (prod > 1) {
prod = 1;
goto retry;
}
*rtblock = r;
return 0;
}

3
fs/xfs/xfs_rtalloc.h
View File

@ -40,7 +40,6 @@ xfs_rtallocate_extent(
xfs_extlen_t minlen, /* minimum length to allocate */
xfs_extlen_t maxlen, /* maximum length to allocate */
xfs_extlen_t *len, /* out: actual length allocated */
xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */
int wasdel, /* was a delayed allocation extent */
xfs_extlen_t prod, /* extent product factor */
xfs_rtblock_t *rtblock); /* out: start block allocated */
@ -122,7 +121,7 @@ int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
#else
# define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS)
# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
# define xfs_rtfree_extent(t,b,l) (ENOSYS)
# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
# define xfs_growfs_rt(mp,in) (ENOSYS)