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| author | Jan Kara <jack@suse.cz> | 2012-11-13 18:25:38 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2012-11-19 21:34:33 +0100 |
| commit | 361d94a338a3fd0cee6a4ea32bbc427ba228e628 (patch) | |
| tree | b6d47973fada0c3cdd633b292772e19679a4f2f2 /fs/reiserfs/super.c | |
| parent | b9e06ef2e8706fe669b51f4364e3aeed58639eb2 (diff) | |
| download | lwn-361d94a338a3fd0cee6a4ea32bbc427ba228e628.tar.gz lwn-361d94a338a3fd0cee6a4ea32bbc427ba228e628.zip | |
reiserfs: Protect reiserfs_quota_write() with write lock
Calls into reiserfs journalling code and reiserfs_get_block() need to
be protected with write lock. We remove write lock around calls to high
level quota code in the next patch so these paths would suddently become
unprotected.
CC: stable@vger.kernel.org # >= 3.0
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/reiserfs/super.c')
| -rw-r--r-- | fs/reiserfs/super.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index e59d6ddcc69f..c101704ece48 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -2338,7 +2338,9 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type, tocopy = sb->s_blocksize - offset < towrite ? sb->s_blocksize - offset : towrite; tmp_bh.b_state = 0; + reiserfs_write_lock(sb); err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE); + reiserfs_write_unlock(sb); if (err) goto out; if (offset || tocopy != sb->s_blocksize) @@ -2354,10 +2356,12 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type, flush_dcache_page(bh->b_page); set_buffer_uptodate(bh); unlock_buffer(bh); + reiserfs_write_lock(sb); reiserfs_prepare_for_journal(sb, bh, 1); journal_mark_dirty(current->journal_info, sb, bh); if (!journal_quota) reiserfs_add_ordered_list(inode, bh); + reiserfs_write_unlock(sb); brelse(bh); offset = 0; towrite -= tocopy; |