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authorAl Viro <viro@zeniv.linux.org.uk>2017-06-08 21:15:03 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-09 16:28:01 -0400
commiteb315d2ae614493fd1ebb026c75a80573d84f7ad (patch)
tree00fea56fd880b0678f63893a4206a8352650cc30 /fs/ufs
parent414cf7186dbec29bd946c138d6b5c09da5955a08 (diff)
downloadlinux-stericsson-eb315d2ae614493fd1ebb026c75a80573d84f7ad.tar.gz
ufs: restore maintaining ->i_blocks
Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ufs')
-rw-r--r--fs/ufs/balloc.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index a0376a2c1c29..d642cc0a8271 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -82,7 +82,8 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
-
+
+ inode_sub_bytes(inode, count << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree += count;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
@@ -184,6 +185,7 @@ do_more:
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
+ inode_sub_bytes(inode, uspi->s_fpb << uspi->s_fshift);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
@@ -494,6 +496,20 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
return 0;
}
+static bool try_add_frags(struct inode *inode, unsigned frags)
+{
+ unsigned size = frags * i_blocksize(inode);
+ spin_lock(&inode->i_lock);
+ __inode_add_bytes(inode, size);
+ if (unlikely((u32)inode->i_blocks != inode->i_blocks)) {
+ __inode_sub_bytes(inode, size);
+ spin_unlock(&inode->i_lock);
+ return false;
+ }
+ spin_unlock(&inode->i_lock);
+ return true;
+}
+
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount)
{
@@ -530,6 +546,9 @@ static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
+
+ if (!try_add_frags(inode, count))
+ return 0;
/*
* Block can be extended
*/
@@ -647,6 +666,7 @@ cg_found:
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
i = uspi->s_fpb - count;
+ inode_sub_bytes(inode, i << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
uspi->cs_total.cs_nffree += i;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
@@ -657,6 +677,8 @@ cg_found:
result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
if (result == INVBLOCK)
return 0;
+ if (!try_add_frags(inode, count))
+ return 0;
for (i = 0; i < count; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
@@ -716,6 +738,8 @@ norot:
return INVBLOCK;
ucpi->c_rotor = result;
gotit:
+ if (!try_add_frags(inode, uspi->s_fpb))
+ return 0;
blkno = ufs_fragstoblks(result);
ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)