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-rw-r--r--fs/xfs/xfs_alloc.c19
-rw-r--r--fs/xfs/xfs_aops.c6
-rw-r--r--fs/xfs/xfs_bit.h7
-rw-r--r--fs/xfs/xfs_bmap_util.c16
-rw-r--r--fs/xfs/xfs_bmap_util.h13
-rw-r--r--fs/xfs/xfs_btree.c12
-rw-r--r--fs/xfs/xfs_buf.h5
-rw-r--r--fs/xfs/xfs_buf_item.c2
-rw-r--r--fs/xfs/xfs_dquot.c6
-rw-r--r--fs/xfs/xfs_ialloc.c1
-rw-r--r--fs/xfs/xfs_log.c2
-rw-r--r--fs/xfs/xfs_mount.c23
-rw-r--r--fs/xfs/xfs_rtbitmap.c1
13 files changed, 60 insertions, 53 deletions
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index c1cf6a336a72..d43813267a80 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -257,16 +257,14 @@ xfs_alloc_fix_len(
k = rlen % args->prod;
if (k == args->mod)
return;
- if (k > args->mod) {
- if ((int)(rlen = rlen - k - args->mod) < (int)args->minlen)
- return;
- } else {
- if ((int)(rlen = rlen - args->prod - (args->mod - k)) <
- (int)args->minlen)
- return;
- }
- ASSERT(rlen >= args->minlen);
- ASSERT(rlen <= args->maxlen);
+ if (k > args->mod)
+ rlen = rlen - (k - args->mod);
+ else
+ rlen = rlen - args->prod + (args->mod - k);
+ if ((int)rlen < (int)args->minlen)
+ return;
+ ASSERT(rlen >= args->minlen && rlen <= args->maxlen);
+ ASSERT(rlen % args->prod == args->mod);
args->len = rlen;
}
@@ -541,7 +539,6 @@ xfs_alloc_read_agfl(
XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_agfl_buf_ops);
if (error)
return error;
- ASSERT(!xfs_buf_geterror(bp));
xfs_buf_set_ref(bp, XFS_AGFL_REF);
*bpp = bp;
return 0;
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index d1b99b692ccb..e32640eedea6 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -975,7 +975,7 @@ xfs_vm_writepage(
* Given that we do not allow direct reclaim to call us, we should
* never be called while in a filesystem transaction.
*/
- if (WARN_ON(current->flags & PF_FSTRANS))
+ if (WARN_ON_ONCE(current->flags & PF_FSTRANS))
goto redirty;
/* Is this page beyond the end of the file? */
@@ -1225,9 +1225,9 @@ xfs_vm_releasepage(
xfs_count_page_state(page, &delalloc, &unwritten);
- if (WARN_ON(delalloc))
+ if (WARN_ON_ONCE(delalloc))
return 0;
- if (WARN_ON(unwritten))
+ if (WARN_ON_ONCE(unwritten))
return 0;
return try_to_free_buffers(page);
diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/xfs_bit.h
index f1e3c907044d..e1649c0d3e02 100644
--- a/fs/xfs/xfs_bit.h
+++ b/fs/xfs/xfs_bit.h
@@ -66,8 +66,11 @@ static inline int xfs_lowbit64(__uint64_t v)
n = ffs(w);
} else { /* upper bits */
w = (__uint32_t)(v >> 32);
- if (w && (n = ffs(w)))
- n += 32;
+ if (w) {
+ n = ffs(w);
+ if (n)
+ n += 32;
+ }
}
return n - 1;
}
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 057f671811d6..703b3ec1796c 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -258,14 +258,23 @@ xfs_bmapi_allocate_worker(
struct xfs_bmalloca *args = container_of(work,
struct xfs_bmalloca, work);
unsigned long pflags;
+ unsigned long new_pflags = PF_FSTRANS;
- /* we are in a transaction context here */
- current_set_flags_nested(&pflags, PF_FSTRANS);
+ /*
+ * we are in a transaction context here, but may also be doing work
+ * in kswapd context, and hence we may need to inherit that state
+ * temporarily to ensure that we don't block waiting for memory reclaim
+ * in any way.
+ */
+ if (args->kswapd)
+ new_pflags |= PF_MEMALLOC | PF_SWAPWRITE | PF_KSWAPD;
+
+ current_set_flags_nested(&pflags, new_pflags);
args->result = __xfs_bmapi_allocate(args);
complete(args->done);
- current_restore_flags_nested(&pflags, PF_FSTRANS);
+ current_restore_flags_nested(&pflags, new_pflags);
}
/*
@@ -284,6 +293,7 @@ xfs_bmapi_allocate(
args->done = &done;
+ args->kswapd = current_is_kswapd();
INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
queue_work(xfs_alloc_wq, &args->work);
wait_for_completion(&done);
diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h
index 935ed2b24edf..075f72232a64 100644
--- a/fs/xfs/xfs_bmap_util.h
+++ b/fs/xfs/xfs_bmap_util.h
@@ -50,12 +50,13 @@ struct xfs_bmalloca {
xfs_extlen_t total; /* total blocks needed for xaction */
xfs_extlen_t minlen; /* minimum allocation size (blocks) */
xfs_extlen_t minleft; /* amount must be left after alloc */
- char eof; /* set if allocating past last extent */
- char wasdel; /* replacing a delayed allocation */
- char userdata;/* set if is user data */
- char aeof; /* allocated space at eof */
- char conv; /* overwriting unwritten extents */
- char stack_switch;
+ bool eof; /* set if allocating past last extent */
+ bool wasdel; /* replacing a delayed allocation */
+ bool userdata;/* set if is user data */
+ bool aeof; /* allocated space at eof */
+ bool conv; /* overwriting unwritten extents */
+ bool stack_switch;
+ bool kswapd; /* allocation in kswapd context */
int flags;
struct completion *done;
struct work_struct work;
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 182bac2bb276..bf810c6baf2b 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -553,14 +553,11 @@ xfs_btree_get_bufl(
xfs_fsblock_t fsbno, /* file system block number */
uint lock) /* lock flags for get_buf */
{
- xfs_buf_t *bp; /* buffer pointer (return value) */
xfs_daddr_t d; /* real disk block address */
ASSERT(fsbno != NULLFSBLOCK);
d = XFS_FSB_TO_DADDR(mp, fsbno);
- bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
- ASSERT(!xfs_buf_geterror(bp));
- return bp;
+ return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
}
/*
@@ -575,15 +572,12 @@ xfs_btree_get_bufs(
xfs_agblock_t agbno, /* allocation group block number */
uint lock) /* lock flags for get_buf */
{
- xfs_buf_t *bp; /* buffer pointer (return value) */
xfs_daddr_t d; /* real disk block address */
ASSERT(agno != NULLAGNUMBER);
ASSERT(agbno != NULLAGBLOCK);
d = XFS_AGB_TO_DADDR(mp, agno, agbno);
- bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
- ASSERT(!xfs_buf_geterror(bp));
- return bp;
+ return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
}
/*
@@ -723,7 +717,6 @@ xfs_btree_read_bufl(
mp->m_bsize, lock, &bp, ops);
if (error)
return error;
- ASSERT(!xfs_buf_geterror(bp));
if (bp)
xfs_buf_set_ref(bp, refval);
*bpp = bp;
@@ -1179,7 +1172,6 @@ xfs_btree_read_buf_block(
if (error)
return error;
- ASSERT(!xfs_buf_geterror(*bpp));
xfs_btree_set_refs(cur, *bpp);
*block = XFS_BUF_TO_BLOCK(*bpp);
return 0;
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 0e47fd1fedba..3a7a5523d3dc 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -298,11 +298,6 @@ extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
extern int xfs_bioerror_relse(struct xfs_buf *);
-static inline int xfs_buf_geterror(xfs_buf_t *bp)
-{
- return bp ? bp->b_error : ENOMEM;
-}
-
/* Buffer Utility Routines */
extern xfs_caddr_t xfs_buf_offset(xfs_buf_t *, size_t);
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 64b17f5bed9a..4654338b03fc 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -1052,7 +1052,7 @@ xfs_buf_iodone_callbacks(
static ulong lasttime;
static xfs_buftarg_t *lasttarg;
- if (likely(!xfs_buf_geterror(bp)))
+ if (likely(!bp->b_error))
goto do_callbacks;
/*
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 5fec738f1f2e..3ee0cd43edc0 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -353,10 +353,10 @@ xfs_qm_dqalloc(
dqp->q_blkno,
mp->m_quotainfo->qi_dqchunklen,
0);
-
- error = xfs_buf_geterror(bp);
- if (error)
+ if (!bp) {
+ error = ENOMEM;
goto error1;
+ }
bp->b_ops = &xfs_dquot_buf_ops;
/*
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index e8dfaf039232..5960e5593fe0 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -2129,7 +2129,6 @@ xfs_read_agi(
if (error)
return error;
- ASSERT(!xfs_buf_geterror(*bpp));
xfs_buf_set_ref(*bpp, XFS_AGI_REF);
return 0;
}
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 3554098692d8..292308dede6d 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1165,7 +1165,7 @@ xlog_iodone(xfs_buf_t *bp)
/*
* Race to shutdown the filesystem if we see an error.
*/
- if (XFS_TEST_ERROR((xfs_buf_geterror(bp)), l->l_mp,
+ if (XFS_TEST_ERROR(bp->b_error, l->l_mp,
XFS_ERRTAG_IODONE_IOERR, XFS_RANDOM_IODONE_IOERR)) {
xfs_buf_ioerror_alert(bp, __func__);
xfs_buf_stale(bp);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 03c9d645865c..3507cd0ec400 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -323,8 +323,19 @@ reread:
/*
* Initialize the mount structure from the superblock.
*/
- xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp));
- xfs_sb_quota_from_disk(&mp->m_sb);
+ xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
+ xfs_sb_quota_from_disk(sbp);
+
+ /*
+ * If we haven't validated the superblock, do so now before we try
+ * to check the sector size and reread the superblock appropriately.
+ */
+ if (sbp->sb_magicnum != XFS_SB_MAGIC) {
+ if (loud)
+ xfs_warn(mp, "Invalid superblock magic number");
+ error = EINVAL;
+ goto release_buf;
+ }
/*
* We must be able to do sector-sized and sector-aligned IO.
@@ -337,11 +348,11 @@ reread:
goto release_buf;
}
- /*
- * Re-read the superblock so the buffer is correctly sized,
- * and properly verified.
- */
if (buf_ops == NULL) {
+ /*
+ * Re-read the superblock so the buffer is correctly sized,
+ * and properly verified.
+ */
xfs_buf_relse(bp);
sector_size = sbp->sb_sectsize;
buf_ops = loud ? &xfs_sb_buf_ops : &xfs_sb_quiet_buf_ops;
diff --git a/fs/xfs/xfs_rtbitmap.c b/fs/xfs/xfs_rtbitmap.c
index b1f2fe8af4a8..f4dd697cac08 100644
--- a/fs/xfs/xfs_rtbitmap.c
+++ b/fs/xfs/xfs_rtbitmap.c
@@ -74,7 +74,6 @@ xfs_rtbuf_get(
mp->m_bsize, 0, &bp, NULL);
if (error)
return error;
- ASSERT(!xfs_buf_geterror(bp));
*bpp = bp;
return 0;
}
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