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authorMark Fasheh <mark.fasheh@oracle.com>2007-05-09 13:40:18 -0700
committerMark Fasheh <mark.fasheh@oracle.com>2007-07-10 17:19:57 -0700
commit2e89b2e48e1da09ed483f195968c9172aa95b5e2 (patch)
tree3e81f49c13134ebcbf4572474ad47b65e5ecffba /fs/ocfs2/file.c
parentbaf4661a8225d3a39622b795a8db0e6aa845c1ec (diff)
ocfs2: take ip_alloc_sem during entire truncate
Use of the alloc sem during truncate was too narrow - we want to protect the i_size change and page truncation against mmap now. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r--fs/ocfs2/file.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 4979b6675717..566f9b70ec91 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -326,9 +326,6 @@ static int ocfs2_truncate_file(struct inode *inode,
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)new_i_size);
- unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
- truncate_inode_pages(inode->i_mapping, new_i_size);
-
fe = (struct ocfs2_dinode *) di_bh->b_data;
if (!OCFS2_IS_VALID_DINODE(fe)) {
OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
@@ -363,16 +360,23 @@ static int ocfs2_truncate_file(struct inode *inode,
if (new_i_size == le64_to_cpu(fe->i_size))
goto bail;
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
/* This forces other nodes to sync and drop their pages. Do
* this even if we have a truncate without allocation change -
* ocfs2 cluster sizes can be much greater than page size, so
* we have to truncate them anyway. */
status = ocfs2_data_lock(inode, 1);
if (status < 0) {
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
mlog_errno(status);
goto bail;
}
+ unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(inode->i_mapping, new_i_size);
+
/* alright, we're going to need to do a full blown alloc size
* change. Orphan the inode so that recovery can complete the
* truncate if necessary. This does the task of marking
@@ -399,6 +403,8 @@ static int ocfs2_truncate_file(struct inode *inode,
bail_unlock_data:
ocfs2_data_unlock(inode, 1);
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
bail:
mlog_exit(status);