Source kernel commit: 9798f615ad2be48466a01c44ad2257ba64ab03bd
Just dereference bp->b_addr directly and make the code a little
simpler and more clear.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
db/info.c | 2 +-
include/xfs.h | 4 +++
libxfs/xfs_ag.c | 6 ++---
libxfs/xfs_alloc.c | 52 ++++++++++++++++---------------------
libxfs/xfs_alloc_btree.c | 10 +++----
libxfs/xfs_format.h | 1 -
libxfs/xfs_refcount_btree.c | 12 ++++-----
libxfs/xfs_rmap_btree.c | 12 ++++-----
repair/phase5.c | 2 +-
repair/scan.c | 2 +-
10 files changed, 50 insertions(+), 53 deletions(-)
diff --git a/db/info.c b/db/info.c
index 5c941dc4..2731446d 100644
--- a/db/info.c
+++ b/db/info.c
@@ -85,7 +85,7 @@ print_agresv_info(
error = -libxfs_read_agf(mp, NULL, agno, 0, &bp);
if (error)
xfrog_perror(error, "AGF");
- agf = XFS_BUF_TO_AGF(bp);
+ agf = bp->b_addr;
length = be32_to_cpu(agf->agf_length);
free = be32_to_cpu(agf->agf_freeblks) +
be32_to_cpu(agf->agf_flcount);
diff --git a/include/xfs.h b/include/xfs.h
index f2f675df..f673d92e 100644
--- a/include/xfs.h
+++ b/include/xfs.h
@@ -30,6 +30,10 @@ extern int xfs_assert_largefile[sizeof(off_t)-8];
#define __packed __attribute__((packed))
#endif
+#ifndef __maybe_unused
+#define __maybe_unused __attribute__((__unused__))
+#endif
+
#ifndef BUILD_BUG_ON
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#endif
diff --git a/libxfs/xfs_ag.c b/libxfs/xfs_ag.c
index 375eeeae..c6160df7 100644
--- a/libxfs/xfs_ag.c
+++ b/libxfs/xfs_ag.c
@@ -243,7 +243,7 @@ xfs_agfblock_init(
struct xfs_buf *bp,
struct aghdr_init_data *id)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
+ struct xfs_agf *agf = bp->b_addr;
xfs_extlen_t tmpsize;
agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
@@ -515,7 +515,7 @@ xfs_ag_extend_space(
if (error)
return error;
- agf = XFS_BUF_TO_AGF(bp);
+ agf = bp->b_addr;
be32_add_cpu(&agf->agf_length, len);
ASSERT(agf->agf_length == agi->agi_length);
xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
@@ -573,7 +573,7 @@ xfs_ag_get_geometry(
ageo->ag_icount = be32_to_cpu(agi->agi_count);
ageo->ag_ifree = be32_to_cpu(agi->agi_freecount);
- agf = XFS_BUF_TO_AGF(agf_bp);
+ agf = agf_bp->b_addr;
ageo->ag_length = be32_to_cpu(agf->agf_length);
freeblks = pag->pagf_freeblks +
pag->pagf_flcount +
diff --git a/libxfs/xfs_alloc.c b/libxfs/xfs_alloc.c
index 268776f2..b3abab49 100644
--- a/libxfs/xfs_alloc.c
+++ b/libxfs/xfs_alloc.c
@@ -710,7 +710,7 @@ xfs_alloc_update_counters(
struct xfs_buf *agbp,
long len)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
pag->pagf_freeblks += len;
be32_add_cpu(&agf->agf_freeblks, len);
@@ -919,13 +919,13 @@ xfs_alloc_cur_finish(
struct xfs_alloc_arg *args,
struct xfs_alloc_cur *acur)
{
+ struct xfs_agf __maybe_unused *agf = args->agbp->b_addr;
int error;
ASSERT(acur->cnt && acur->bnolt);
ASSERT(acur->bno >= acur->rec_bno);
ASSERT(acur->bno + acur->len <= acur->rec_bno + acur->rec_len);
- ASSERT(acur->rec_bno + acur->rec_len <=
- be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length));
+ ASSERT(acur->rec_bno + acur->rec_len <= be32_to_cpu(agf->agf_length));
error = xfs_alloc_fixup_trees(acur->cnt, acur->bnolt, acur->rec_bno,
acur->rec_len, acur->bno, acur->len, 0);
@@ -1023,6 +1023,7 @@ xfs_alloc_ag_vextent_small(
xfs_extlen_t *flenp, /* result length */
int *stat) /* status: 0-freelist, 1-normal/none */
{
+ struct xfs_agf *agf = args->agbp->b_addr;
int error = 0;
xfs_agblock_t fbno = NULLAGBLOCK;
xfs_extlen_t flen = 0;
@@ -1051,8 +1052,7 @@ xfs_alloc_ag_vextent_small(
if (args->minlen != 1 || args->alignment != 1 ||
args->resv == XFS_AG_RESV_AGFL ||
- (be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_flcount) <=
- args->minleft))
+ be32_to_cpu(agf->agf_flcount) <= args->minleft)
goto out;
error = xfs_alloc_get_freelist(args->tp, args->agbp, &fbno, 0);
@@ -1076,9 +1076,7 @@ xfs_alloc_ag_vextent_small(
}
*fbnop = args->agbno = fbno;
*flenp = args->len = 1;
- if (XFS_IS_CORRUPT(args->mp,
- fbno >= be32_to_cpu(
- XFS_BUF_TO_AGF(args->agbp)->agf_length))) {
+ if (XFS_IS_CORRUPT(args->mp, fbno >= be32_to_cpu(agf->agf_length))) {
error = -EFSCORRUPTED;
goto error;
}
@@ -1200,6 +1198,7 @@ STATIC int /* error */
xfs_alloc_ag_vextent_exact(
xfs_alloc_arg_t *args) /* allocation argument structure */
{
+ struct xfs_agf __maybe_unused *agf = args->agbp->b_addr;
xfs_btree_cur_t *bno_cur;/* by block-number btree cursor */
xfs_btree_cur_t *cnt_cur;/* by count btree cursor */
int error;
@@ -1278,8 +1277,7 @@ xfs_alloc_ag_vextent_exact(
*/
cnt_cur = xfs_allocbt_init_cursor(args->mp, args->tp, args->agbp,
args->agno, XFS_BTNUM_CNT);
- ASSERT(args->agbno + args->len <=
- be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length));
+ ASSERT(args->agbno + args->len <= be32_to_cpu(agf->agf_length));
error = xfs_alloc_fixup_trees(cnt_cur, bno_cur, fbno, flen, args->agbno,
args->len, XFSA_FIXUP_BNO_OK);
if (error) {
@@ -1658,6 +1656,7 @@ STATIC int /* error */
xfs_alloc_ag_vextent_size(
xfs_alloc_arg_t *args) /* allocation argument structure */
{
+ struct xfs_agf *agf = args->agbp->b_addr;
xfs_btree_cur_t *bno_cur; /* cursor for bno btree */
xfs_btree_cur_t *cnt_cur; /* cursor for cnt btree */
int error; /* error result */
@@ -1848,8 +1847,7 @@ restart:
args->agbno = rbno;
if (XFS_IS_CORRUPT(args->mp,
args->agbno + args->len >
- be32_to_cpu(
- XFS_BUF_TO_AGF(args->agbp)->agf_length))) {
+ be32_to_cpu(agf->agf_length))) {
error = -EFSCORRUPTED;
goto error0;
}
@@ -2421,7 +2419,7 @@ xfs_agfl_reset(
struct xfs_perag *pag)
{
struct xfs_mount *mp = tp->t_mountp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
ASSERT(pag->pagf_agflreset);
trace_xfs_agfl_reset(mp, agf, 0, _RET_IP_);
@@ -2652,7 +2650,7 @@ xfs_alloc_get_freelist(
xfs_agblock_t *bnop, /* block address retrieved from freelist */
int btreeblk) /* destination is a AGF btree */
{
- xfs_agf_t *agf; /* a.g. freespace structure */
+ struct xfs_agf *agf = agbp->b_addr;
xfs_buf_t *agflbp;/* buffer for a.g. freelist structure */
xfs_agblock_t bno; /* block number returned */
__be32 *agfl_bno;
@@ -2664,7 +2662,6 @@ xfs_alloc_get_freelist(
/*
* Freelist is empty, give up.
*/
- agf = XFS_BUF_TO_AGF(agbp);
if (!agf->agf_flcount) {
*bnop = NULLAGBLOCK;
return 0;
@@ -2742,7 +2739,7 @@ xfs_alloc_log_agf(
sizeof(xfs_agf_t)
};
- trace_xfs_agf(tp->t_mountp, XFS_BUF_TO_AGF(bp), fields, _RET_IP_);
+ trace_xfs_agf(tp->t_mountp, bp->b_addr, fields, _RET_IP_);
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_AGF_BUF);
@@ -2780,18 +2777,15 @@ xfs_alloc_put_freelist(
xfs_agblock_t bno, /* block being freed */
int btreeblk) /* block came from a AGF btree */
{
- xfs_agf_t *agf; /* a.g. freespace structure */
+ struct xfs_mount *mp = tp->t_mountp;
+ struct xfs_agf *agf = agbp->b_addr;
__be32 *blockp;/* pointer to array entry */
int error;
int logflags;
- xfs_mount_t *mp; /* mount structure */
xfs_perag_t *pag; /* per allocation group data */
__be32 *agfl_bno;
int startoff;
- agf = XFS_BUF_TO_AGF(agbp);
- mp = tp->t_mountp;
-
if (!agflbp && (error = xfs_alloc_read_agfl(mp, tp,
be32_to_cpu(agf->agf_seqno), &agflbp)))
return error;
@@ -2835,13 +2829,12 @@ xfs_agf_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_mount;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
+ struct xfs_agf *agf = bp->b_addr;
if (xfs_sb_version_hascrc(&mp->m_sb)) {
if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid))
return __this_address;
- if (!xfs_log_check_lsn(mp,
- be64_to_cpu(XFS_BUF_TO_AGF(bp)->agf_lsn)))
+ if (!xfs_log_check_lsn(mp, be64_to_cpu(agf->agf_lsn)))
return __this_address;
}
@@ -2927,6 +2920,7 @@ xfs_agf_write_verify(
{
struct xfs_mount *mp = bp->b_mount;
struct xfs_buf_log_item *bip = bp->b_log_item;
+ struct xfs_agf *agf = bp->b_addr;
xfs_failaddr_t fa;
fa = xfs_agf_verify(bp);
@@ -2939,7 +2933,7 @@ xfs_agf_write_verify(
return;
if (bip)
- XFS_BUF_TO_AGF(bp)->agf_lsn = cpu_to_be64(bip->bli_item.li_lsn);
+ agf->agf_lsn = cpu_to_be64(bip->bli_item.li_lsn);
xfs_buf_update_cksum(bp, XFS_AGF_CRC_OFF);
}
@@ -3007,7 +3001,7 @@ xfs_alloc_read_agf(
return error;
ASSERT(!(*bpp)->b_error);
- agf = XFS_BUF_TO_AGF(*bpp);
+ agf = (*bpp)->b_addr;
pag = xfs_perag_get(mp, agno);
if (!pag->pagf_init) {
pag->pagf_freeblks = be32_to_cpu(agf->agf_freeblks);
@@ -3288,6 +3282,7 @@ __xfs_free_extent(
struct xfs_buf *agbp;
xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, bno);
xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp, bno);
+ struct xfs_agf *agf;
int error;
unsigned int busy_flags = 0;
@@ -3301,6 +3296,7 @@ __xfs_free_extent(
error = xfs_free_extent_fix_freelist(tp, agno, &agbp);
if (error)
return error;
+ agf = agbp->b_addr;
if (XFS_IS_CORRUPT(mp, agbno >= mp->m_sb.sb_agblocks)) {
error = -EFSCORRUPTED;
@@ -3308,9 +3304,7 @@ __xfs_free_extent(
}
/* validate the extent size is legal now we have the agf locked */
- if (XFS_IS_CORRUPT(mp,
- agbno + len >
- be32_to_cpu(XFS_BUF_TO_AGF(agbp)->agf_length))) {
+ if (XFS_IS_CORRUPT(mp, agbno + len > be32_to_cpu(agf->agf_length))) {
error = -EFSCORRUPTED;
goto err;
}
diff --git a/libxfs/xfs_alloc_btree.c b/libxfs/xfs_alloc_btree.c
index 57327deb..337db214 100644
--- a/libxfs/xfs_alloc_btree.c
+++ b/libxfs/xfs_alloc_btree.c
@@ -34,7 +34,7 @@ xfs_allocbt_set_root(
int inc)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
int btnum = cur->bc_btnum;
struct xfs_perag *pag = xfs_perag_get(cur->bc_mp, seqno);
@@ -85,7 +85,7 @@ xfs_allocbt_free_block(
struct xfs_buf *bp)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_agblock_t bno;
int error;
@@ -111,7 +111,7 @@ xfs_allocbt_update_lastrec(
int ptr,
int reason)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
+ struct xfs_agf *agf = cur->bc_private.a.agbp->b_addr;
xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
struct xfs_perag *pag;
__be32 len;
@@ -224,7 +224,7 @@ xfs_allocbt_init_ptr_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
+ struct xfs_agf *agf = cur->bc_private.a.agbp->b_addr;
ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
@@ -480,7 +480,7 @@ xfs_allocbt_init_cursor(
xfs_agnumber_t agno, /* allocation group number */
xfs_btnum_t btnum) /* btree identifier */
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
struct xfs_btree_cur *cur;
ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index dbcd8b27..1fec1302 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -707,7 +707,6 @@ typedef struct xfs_agf {
/* disk block (xfs_daddr_t) in the AG */
#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log))
#define XFS_AGF_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGF_DADDR(mp))
-#define XFS_BUF_TO_AGF(bp) ((xfs_agf_t *)((bp)->b_addr))
/*
* Size of the unlinked inode hash table in the agi.
diff --git a/libxfs/xfs_refcount_btree.c b/libxfs/xfs_refcount_btree.c
index c1561325..75c60aac 100644
--- a/libxfs/xfs_refcount_btree.c
+++ b/libxfs/xfs_refcount_btree.c
@@ -34,7 +34,7 @@ xfs_refcountbt_set_root(
int inc)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
struct xfs_perag *pag = xfs_perag_get(cur->bc_mp, seqno);
@@ -57,7 +57,7 @@ xfs_refcountbt_alloc_block(
int *stat)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
struct xfs_alloc_arg args; /* block allocation args */
int error; /* error return value */
@@ -101,7 +101,7 @@ xfs_refcountbt_free_block(
{
struct xfs_mount *mp = cur->bc_mp;
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
int error;
@@ -168,7 +168,7 @@ xfs_refcountbt_init_ptr_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
+ struct xfs_agf *agf = cur->bc_private.a.agbp->b_addr;
ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
@@ -319,7 +319,7 @@ xfs_refcountbt_init_cursor(
struct xfs_buf *agbp,
xfs_agnumber_t agno)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
struct xfs_btree_cur *cur;
ASSERT(agno != NULLAGNUMBER);
@@ -419,7 +419,7 @@ xfs_refcountbt_calc_reserves(
if (error)
return error;
- agf = XFS_BUF_TO_AGF(agbp);
+ agf = agbp->b_addr;
agblocks = be32_to_cpu(agf->agf_length);
tree_len = be32_to_cpu(agf->agf_refcount_blocks);
xfs_trans_brelse(tp, agbp);
diff --git a/libxfs/xfs_rmap_btree.c b/libxfs/xfs_rmap_btree.c
index 95b1c204..87503247 100644
--- a/libxfs/xfs_rmap_btree.c
+++ b/libxfs/xfs_rmap_btree.c
@@ -59,7 +59,7 @@ xfs_rmapbt_set_root(
int inc)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_agnumber_t seqno = be32_to_cpu(agf->agf_seqno);
int btnum = cur->bc_btnum;
struct xfs_perag *pag = xfs_perag_get(cur->bc_mp, seqno);
@@ -82,7 +82,7 @@ xfs_rmapbt_alloc_block(
int *stat)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
int error;
xfs_agblock_t bno;
@@ -119,7 +119,7 @@ xfs_rmapbt_free_block(
struct xfs_buf *bp)
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
xfs_agblock_t bno;
int error;
@@ -213,7 +213,7 @@ xfs_rmapbt_init_ptr_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(cur->bc_private.a.agbp);
+ struct xfs_agf *agf = cur->bc_private.a.agbp->b_addr;
ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
@@ -456,7 +456,7 @@ xfs_rmapbt_init_cursor(
struct xfs_buf *agbp,
xfs_agnumber_t agno)
{
- struct xfs_agf *agf = XFS_BUF_TO_AGF(agbp);
+ struct xfs_agf *agf = agbp->b_addr;
struct xfs_btree_cur *cur;
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);
@@ -567,7 +567,7 @@ xfs_rmapbt_calc_reserves(
if (error)
return error;
- agf = XFS_BUF_TO_AGF(agbp);
+ agf = agbp->b_addr;
agblocks = be32_to_cpu(agf->agf_length);
tree_len = be32_to_cpu(agf->agf_rmap_blocks);
xfs_trans_brelse(tp, agbp);
diff --git a/repair/phase5.c b/repair/phase5.c
index f41e9716..fd7659dc 100644
--- a/repair/phase5.c
+++ b/repair/phase5.c
@@ -2070,7 +2070,7 @@ build_agf_agfl(
do_error(_("Cannot grab AG %u AGF buffer, err=%d"),
agno, error);
agf_buf->b_ops = &xfs_agf_buf_ops;
- agf = XFS_BUF_TO_AGF(agf_buf);
+ agf = agf_buf->b_addr;
memset(agf, 0, mp->m_sb.sb_sectsize);
#ifdef XR_BLD_FREE_TRACE
diff --git a/repair/scan.c b/repair/scan.c
index 32937ada..e40ce194 100644
--- a/repair/scan.c
+++ b/repair/scan.c
@@ -2384,7 +2384,7 @@ scan_ag(
objname = _("agf block");
goto out_free_sbbuf;
}
- agf = XFS_BUF_TO_AGF(agfbuf);
+ agf = agfbuf->b_addr;
error = salvage_buffer(mp->m_dev,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
--
2.26.2
