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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2008-09-13 13:10:25 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-09-13 13:10:25 -0400 |
| commit | ae4d537211ff250a8c23c4f1227c4276cd2508ab (patch) | |
| tree | 58aeb4ba30d0ae5b3bff93933200001349547721 | |
| parent | df22291ff0fde0d350cf15dac3e5cc33ac528875 (diff) | |
| download | op-kernel-dev-ae4d537211ff250a8c23c4f1227c4276cd2508ab.zip op-kernel-dev-ae4d537211ff250a8c23c4f1227c4276cd2508ab.tar.gz | |
ext4: truncate block allocated on a failed ext4_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 pages 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>
| -rw-r--r-- | fs/ext4/inode.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index f97b347..634f0bc 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1391,6 +1391,13 @@ retry: unlock_page(page); ext4_journal_stop(handle); 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 && ext4_should_retry_alloc(inode->i_sb, &retries)) @@ -2560,6 +2567,13 @@ retry: unlock_page(page); ext4_journal_stop(handle); 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 && ext4_should_retry_alloc(inode->i_sb, &retries)) |
