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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2008-10-18 20:28:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 08:52:38 -0700
commit5ec8b75e3a2a94860ee99b5456fe1a963c8680e5 (patch)
tree7b79032a1450c955d17ea909f001404802fc9c01 /fs/ext3
parent6a897cf447a83c9c3fd1b85a1e525c02d6eada7d (diff)
downloadop-kernel-dev-5ec8b75e3a2a94860ee99b5456fe1a963c8680e5.zip
op-kernel-dev-5ec8b75e3a2a94860ee99b5456fe1a963c8680e5.tar.gz
ext3: truncate block allocated on a failed ext3_write_begin
For blocksize < pagesize we need to remove blocks that got allocated in block_write_begin() if we fail with ENOSPC for later blocks. block_write_begin() internally does this if it allocated page locally. This makes sure we don't have blocks outside inode.i_size during ENOSPC. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext3')
-rw-r--r--fs/ext3/inode.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index ebfec4d..f8424ad 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1186,6 +1186,13 @@ write_begin_failed:
ext3_journal_stop(handle);
unlock_page(page);
page_cache_release(page);
+ /*
+ * block_write_begin may have instantiated a few blocks
+ * outside i_size. Trim these off again. Don't need
+ * i_size_read because we hold i_mutex.
+ */
+ if (pos + len > inode->i_size)
+ vmtruncate(inode, inode->i_size);
}
if (ret == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
goto retry;
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