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-rw-r--r--fs/ocfs2/aops.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index b36dcad3a140..a7ab145e2901 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -533,10 +533,14 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
inode_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode));
+ down_read(&OCFS2_I(inode)->ip_alloc_sem);
+
/* This figures out the size of the next contiguous block, and
* our logical offset */
ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
&contig_blocks, &ext_flags);
+ up_read(&OCFS2_I(inode)->ip_alloc_sem);
+
if (ret) {
mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n",
(unsigned long long)iblock);
@@ -557,6 +561,8 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
alloc_locked = 1;
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
/* fill hole, allocate blocks can't be larger than the size
* of the hole */
clusters_to_alloc = ocfs2_clusters_for_bytes(inode->i_sb, len);
@@ -569,6 +575,7 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
ret = ocfs2_extend_allocation(inode, cpos,
clusters_to_alloc, 0);
if (ret < 0) {
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
mlog_errno(ret);
goto bail;
}
@@ -576,11 +583,13 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
&contig_blocks, &ext_flags);
if (ret < 0) {
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n",
(unsigned long long)iblock);
ret = -EIO;
goto bail;
}
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
}
/*
@@ -835,12 +844,17 @@ static ssize_t ocfs2_direct_IO_write(struct kiocb *iocb,
/* zeroing out the previously allocated cluster tail
* that but not zeroed */
- if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
+ if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) {
+ down_read(&OCFS2_I(inode)->ip_alloc_sem);
ret = ocfs2_direct_IO_zero_extend(osb, inode, offset,
zero_len_tail, cluster_align_tail);
- else
+ up_read(&OCFS2_I(inode)->ip_alloc_sem);
+ } else {
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
ret = ocfs2_direct_IO_extend_no_holes(osb, inode,
offset);
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+ }
if (ret < 0) {
mlog_errno(ret);
ocfs2_inode_unlock(inode, 1);