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authorLinus Torvalds <torvalds@g5.osdl.org>2006-09-12 17:31:16 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-12 17:31:16 -0700
commitaf84b99f22df115e7aec41d5dbe936e163ef4e2e (patch)
tree7f0b0ef4ee3a3985281cd50d3f629dc582f3db9f /fs
parent05ff0e291af086f4325bac76abad250690bbbd63 (diff)
parent0edc7d0f3709e8c3bb7e69c4df614218a753361e (diff)
downloadlinux-stericsson-af84b99f22df115e7aec41d5dbe936e163ef4e2e.tar.gz
Merge git://oss.sgi.com:8090/xfs/xfs-2.6
* git://oss.sgi.com:8090/xfs/xfs-2.6: [XFS] Fix a bad pointer dereference in the quota statvfs handling. [XFS] Fix xfs_splice_write() so appended data gets to disk. [XFS] Fix ABBA deadlock between i_mutex and iolock. Avoid calling [XFS] Prevent free space oversubscription and xfssyncd looping.
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/linux-2.6/xfs_aops.c18
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c27
-rw-r--r--fs/xfs/quota/xfs_qm_bhv.c2
-rw-r--r--fs/xfs/xfs_alloc.h20
-rw-r--r--fs/xfs/xfs_fsops.c16
-rw-r--r--fs/xfs/xfs_mount.c32
-rw-r--r--fs/xfs/xfs_vfsops.c3
7 files changed, 76 insertions, 42 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index c40f81ba9b13..34dcb43a7837 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1390,11 +1390,19 @@ xfs_vm_direct_IO(
iocb->private = xfs_alloc_ioend(inode, IOMAP_UNWRITTEN);
- ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
- iomap.iomap_target->bt_bdev,
- iov, offset, nr_segs,
- xfs_get_blocks_direct,
- xfs_end_io_direct);
+ if (rw == WRITE) {
+ ret = blockdev_direct_IO_own_locking(rw, iocb, inode,
+ iomap.iomap_target->bt_bdev,
+ iov, offset, nr_segs,
+ xfs_get_blocks_direct,
+ xfs_end_io_direct);
+ } else {
+ ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
+ iomap.iomap_target->bt_bdev,
+ iov, offset, nr_segs,
+ xfs_get_blocks_direct,
+ xfs_end_io_direct);
+ }
if (unlikely(ret <= 0 && iocb->private))
xfs_destroy_ioend(iocb->private);
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 5d9cfd91ad08..ee788b1cb364 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -264,7 +264,9 @@ xfs_read(
dmflags, &locktype);
if (ret) {
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
- goto unlock_mutex;
+ if (unlikely(ioflags & IO_ISDIRECT))
+ mutex_unlock(&inode->i_mutex);
+ return ret;
}
}
@@ -272,6 +274,9 @@ xfs_read(
bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
-1, FI_REMAPF_LOCKED);
+ if (unlikely(ioflags & IO_ISDIRECT))
+ mutex_unlock(&inode->i_mutex);
+
xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
(void *)iovp, segs, *offset, ioflags);
ret = __generic_file_aio_read(iocb, iovp, segs, offset);
@@ -281,10 +286,6 @@ xfs_read(
XFS_STATS_ADD(xs_read_bytes, ret);
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-
-unlock_mutex:
- if (unlikely(ioflags & IO_ISDIRECT))
- mutex_unlock(&inode->i_mutex);
return ret;
}
@@ -390,6 +391,8 @@ xfs_splice_write(
xfs_inode_t *ip = XFS_BHVTOI(bdp);
xfs_mount_t *mp = ip->i_mount;
ssize_t ret;
+ struct inode *inode = outfilp->f_mapping->host;
+ xfs_fsize_t isize;
XFS_STATS_INC(xs_write_calls);
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
@@ -416,6 +419,20 @@ xfs_splice_write(
if (ret > 0)
XFS_STATS_ADD(xs_write_bytes, ret);
+ isize = i_size_read(inode);
+ if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize))
+ *ppos = isize;
+
+ if (*ppos > ip->i_d.di_size) {
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ if (*ppos > ip->i_d.di_size) {
+ ip->i_d.di_size = *ppos;
+ i_size_write(inode, *ppos);
+ ip->i_update_core = 1;
+ ip->i_update_size = 1;
+ }
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ }
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
return ret;
}
diff --git a/fs/xfs/quota/xfs_qm_bhv.c b/fs/xfs/quota/xfs_qm_bhv.c
index f137856c3261..db8872be8c87 100644
--- a/fs/xfs/quota/xfs_qm_bhv.c
+++ b/fs/xfs/quota/xfs_qm_bhv.c
@@ -203,7 +203,7 @@ xfs_qm_statvfs(
if (error || !vnode)
return error;
- mp = XFS_BHVTOM(bhv);
+ mp = xfs_vfstom(bhvtovfs(bhv));
ip = xfs_vtoi(vnode);
if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h
index 650591f999ae..5a4256120ccc 100644
--- a/fs/xfs/xfs_alloc.h
+++ b/fs/xfs/xfs_alloc.h
@@ -44,6 +44,26 @@ typedef enum xfs_alloctype
#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
/*
+ * In order to avoid ENOSPC-related deadlock caused by
+ * out-of-order locking of AGF buffer (PV 947395), we place
+ * constraints on the relationship among actual allocations for
+ * data blocks, freelist blocks, and potential file data bmap
+ * btree blocks. However, these restrictions may result in no
+ * actual space allocated for a delayed extent, for example, a data
+ * block in a certain AG is allocated but there is no additional
+ * block for the additional bmap btree block due to a split of the
+ * bmap btree of the file. The result of this may lead to an
+ * infinite loop in xfssyncd when the file gets flushed to disk and
+ * all delayed extents need to be actually allocated. To get around
+ * this, we explicitly set aside a few blocks which will not be
+ * reserved in delayed allocation. Considering the minimum number of
+ * needed freelist blocks is 4 fsbs _per AG_, a potential split of file's bmap
+ * btree requires 1 fsb, so we set the number of set-aside blocks
+ * to 4 + 4*agcount.
+ */
+#define XFS_ALLOC_SET_ASIDE(mp) (4 + ((mp)->m_sb.sb_agcount * 4))
+
+/*
* Argument structure for xfs_alloc routines.
* This is turned into a structure to avoid having 20 arguments passed
* down several levels of the stack.
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 077629bab532..c064e72ada9e 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -462,7 +462,7 @@ xfs_fs_counts(
xfs_icsb_sync_counters_lazy(mp);
s = XFS_SB_LOCK(mp);
- cnt->freedata = mp->m_sb.sb_fdblocks;
+ cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
cnt->freertx = mp->m_sb.sb_frextents;
cnt->freeino = mp->m_sb.sb_ifree;
cnt->allocino = mp->m_sb.sb_icount;
@@ -519,15 +519,19 @@ xfs_reserve_blocks(
}
mp->m_resblks = request;
} else {
+ __int64_t free;
+
+ free = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
delta = request - mp->m_resblks;
- lcounter = mp->m_sb.sb_fdblocks - delta;
+ lcounter = free - delta;
if (lcounter < 0) {
/* We can't satisfy the request, just get what we can */
- mp->m_resblks += mp->m_sb.sb_fdblocks;
- mp->m_resblks_avail += mp->m_sb.sb_fdblocks;
- mp->m_sb.sb_fdblocks = 0;
+ mp->m_resblks += free;
+ mp->m_resblks_avail += free;
+ mp->m_sb.sb_fdblocks = XFS_ALLOC_SET_ASIDE(mp);
} else {
- mp->m_sb.sb_fdblocks = lcounter;
+ mp->m_sb.sb_fdblocks =
+ lcounter + XFS_ALLOC_SET_ASIDE(mp);
mp->m_resblks = request;
mp->m_resblks_avail += delta;
}
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 4be5c0b2d296..9dfae18d995f 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1243,24 +1243,6 @@ xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
xfs_trans_log_buf(tp, bp, first, last);
}
-/*
- * In order to avoid ENOSPC-related deadlock caused by
- * out-of-order locking of AGF buffer (PV 947395), we place
- * constraints on the relationship among actual allocations for
- * data blocks, freelist blocks, and potential file data bmap
- * btree blocks. However, these restrictions may result in no
- * actual space allocated for a delayed extent, for example, a data
- * block in a certain AG is allocated but there is no additional
- * block for the additional bmap btree block due to a split of the
- * bmap btree of the file. The result of this may lead to an
- * infinite loop in xfssyncd when the file gets flushed to disk and
- * all delayed extents need to be actually allocated. To get around
- * this, we explicitly set aside a few blocks which will not be
- * reserved in delayed allocation. Considering the minimum number of
- * needed freelist blocks is 4 fsbs, a potential split of file's bmap
- * btree requires 1 fsb, so we set the number of set-aside blocks to 8.
-*/
-#define SET_ASIDE_BLOCKS 8
/*
* xfs_mod_incore_sb_unlocked() is a utility routine common used to apply
@@ -1306,7 +1288,8 @@ xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
return 0;
case XFS_SBS_FDBLOCKS:
- lcounter = (long long)mp->m_sb.sb_fdblocks - SET_ASIDE_BLOCKS;
+ lcounter = (long long)
+ mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
if (delta > 0) { /* Putting blocks back */
@@ -1340,7 +1323,7 @@ xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
}
}
- mp->m_sb.sb_fdblocks = lcounter + SET_ASIDE_BLOCKS;
+ mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
return 0;
case XFS_SBS_FREXTENTS:
lcounter = (long long)mp->m_sb.sb_frextents;
@@ -2021,7 +2004,8 @@ xfs_icsb_sync_counters_lazy(
* when we get near ENOSPC.
*/
#define XFS_ICSB_INO_CNTR_REENABLE 64
-#define XFS_ICSB_FDBLK_CNTR_REENABLE 512
+#define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \
+ (512 + XFS_ALLOC_SET_ASIDE(mp))
STATIC void
xfs_icsb_balance_counter(
xfs_mount_t *mp,
@@ -2055,7 +2039,7 @@ xfs_icsb_balance_counter(
case XFS_SBS_FDBLOCKS:
count = mp->m_sb.sb_fdblocks;
resid = do_div(count, weight);
- if (count < XFS_ICSB_FDBLK_CNTR_REENABLE)
+ if (count < XFS_ICSB_FDBLK_CNTR_REENABLE(mp))
goto out;
break;
default:
@@ -2110,11 +2094,11 @@ again:
case XFS_SBS_FDBLOCKS:
BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0);
- lcounter = icsbp->icsb_fdblocks;
+ lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
lcounter += delta;
if (unlikely(lcounter < 0))
goto slow_path;
- icsbp->icsb_fdblocks = lcounter;
+ icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
break;
default:
BUG();
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index b427d220a169..a34796e57afb 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -811,7 +811,8 @@ xfs_statvfs(
statp->f_bsize = sbp->sb_blocksize;
lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
statp->f_blocks = sbp->sb_dblocks - lsize;
- statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks;
+ statp->f_bfree = statp->f_bavail =
+ sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
fakeinos = statp->f_bfree << sbp->sb_inopblog;
#if XFS_BIG_INUMS
fakeinos += mp->m_inoadd;