Three functions of the current persistent object allocator,
nilfs_palloc_commit_free_entry, nilfs_palloc_abort_alloc_entry, and
nilfs_palloc_freev functions unconditionally add a counter after clear
bit operation on a bitmap block succeeded.
If the clear bit operation overlapped, the counter will not add up.
This fixes the issue by making the counter operations conditional.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
---
fs/nilfs2/alloc.c | 12 +++++++-----
1 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index d7fd696..0a0a66d 100644
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -521,8 +521,8 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
group_offset, bitmap))
printk(KERN_WARNING "%s: entry number %llu already freed\n",
__func__, (unsigned long long)req->pr_entry_nr);
-
- nilfs_palloc_group_desc_add_entries(inode, group, desc, 1);
+ else
+ nilfs_palloc_group_desc_add_entries(inode, group, desc, 1);
kunmap(req->pr_bitmap_bh->b_page);
kunmap(req->pr_desc_bh->b_page);
@@ -558,8 +558,8 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode,
group_offset, bitmap))
printk(KERN_WARNING "%s: entry number %llu already freed\n",
__func__, (unsigned long long)req->pr_entry_nr);
-
- nilfs_palloc_group_desc_add_entries(inode, group, desc, 1);
+ else
+ nilfs_palloc_group_desc_add_entries(inode, group, desc, 1);
kunmap(req->pr_bitmap_bh->b_page);
kunmap(req->pr_desc_bh->b_page);
@@ -665,7 +665,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
for (j = i, n = 0;
(j < nitems) && nilfs_palloc_group_is_in(inode, group,
entry_nrs[j]);
- j++, n++) {
+ j++) {
nilfs_palloc_group(inode, entry_nrs[j], &group_offset);
if (!nilfs_clear_bit_atomic(
nilfs_mdt_bgl_lock(inode, group),
@@ -674,6 +674,8 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
"%s: entry number %llu already freed\n",
__func__,
(unsigned long long)entry_nrs[j]);
+ } else {
+ n++;
}
}
nilfs_palloc_group_desc_add_entries(inode, group, desc, n);
--
1.7.3.5
--
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