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| author | Joel Becker <joel.becker@oracle.com> | 2007-03-29 03:27:07 +0200 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2007-05-03 00:07:42 +0200 |
| commit | ee19a77956cb65c5da54d85a5efefe50b39fa6e5 (patch) | |
| tree | 1ce4410333f2ad72460cb742d3f5974acb6f9caa /fs/ocfs2/inode.c | |
| parent | [PATCH] fs/ocfs2/: make 3 functions static (diff) | |
| download | linux-ee19a77956cb65c5da54d85a5efefe50b39fa6e5.tar.xz linux-ee19a77956cb65c5da54d85a5efefe50b39fa6e5.zip | |
ocfs2: Wrap access of directory allocations with ip_alloc_sem.
OCFS2_I(inode)->ip_alloc_sem is a read-write semaphore protecting
local concurrent access of ocfs2 inodes. However, ocfs2 directories were
not taking the semaphore while they accessed or modified the allocation
tree.
ocfs2_extend_dir() needs to take the semaphore in a write mode when it
adds to the allocation. All other directory users get there via
ocfs2_bread(), which takes the semaphore in read mode.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/inode.c')
| -rw-r--r-- | fs/ocfs2/inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 21a605079c62..58ec54b60038 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -1106,8 +1106,10 @@ struct buffer_head *ocfs2_bread(struct inode *inode, return NULL; } + down_read(&OCFS2_I(inode)->ip_alloc_sem); tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL, NULL); + up_read(&OCFS2_I(inode)->ip_alloc_sem); if (tmperr < 0) { mlog_errno(tmperr); goto fail; |