kernel.git/fs/ocfs2/refcounttree.c, branch linux-4.0.y

ocfs2: remove pointless assignment from ocfs2_calc_refcount_meta_credits()

2015-02-10T22:30:29Z

The assigned value is never used. Coverity-id 1226847. Signed-off-by: Jan Kara Cc: Mark Fasheh Cc: Joel Becker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: correctly check the return value of ocfs2_search_extent_list

2014-08-07T01:01:13Z

ocfs2_search_extent_list may return -1, so we should check the return value in ocfs2_split_and_insert, otherwise it may cause array index out of bound. And ocfs2_search_extent_list can only return value less than el->l_next_free_rec, so check if it is equal or larger than le16_to_cpu(el->l_next_free_rec) is meaningless. Signed-off-by: Yingtai Xie Signed-off-by: Joseph Qi Cc: Joel Becker Cc: Mark Fasheh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: refcount: take rw_lock in ocfs2_reflink

2014-06-23T23:47:45Z

This patch tries to fix this crash: #5 [ffff88003c1cd690] do_invalid_op at ffffffff810166d5 #6 [ffff88003c1cd730] invalid_op at ffffffff8159b2de [exception RIP: ocfs2_direct_IO_get_blocks+359] RIP: ffffffffa05dfa27 RSP: ffff88003c1cd7e8 RFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff88003c1cdaa8 RCX: 0000000000000000 RDX: 000000000000000c RSI: ffff880027a95000 RDI: ffff88003c79b540 RBP: ffff88003c1cd858 R8: 0000000000000000 R9: ffffffff815f6ba0 R10: 00000000000001c9 R11: 00000000000001c9 R12: ffff88002d271500 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000001000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffff88003c1cd860] do_direct_IO at ffffffff811cd31b #8 [ffff88003c1cd950] direct_IO_iovec at ffffffff811cde9c #9 [ffff88003c1cd9b0] do_blockdev_direct_IO at ffffffff811ce764 #10 [ffff88003c1cdb80] __blockdev_direct_IO at ffffffff811ce7cc #11 [ffff88003c1cdbb0] ocfs2_direct_IO at ffffffffa05df756 [ocfs2] #12 [ffff88003c1cdbe0] generic_file_direct_write_iter at ffffffff8112f935 #13 [ffff88003c1cdc40] ocfs2_file_write_iter at ffffffffa0600ccc [ocfs2] #14 [ffff88003c1cdd50] do_aio_write at ffffffff8119126c #15 [ffff88003c1cddc0] aio_rw_vect_retry at ffffffff811d9bb4 #16 [ffff88003c1cddf0] aio_run_iocb at ffffffff811db880 #17 [ffff88003c1cde30] io_submit_one at ffffffff811dc238 #18 [ffff88003c1cde80] do_io_submit at ffffffff811dc437 #19 [ffff88003c1cdf70] sys_io_submit at ffffffff811dc530 #20 [ffff88003c1cdf80] system_call_fastpath at ffffffff8159a159 It crashes at BUG_ON(create && (ext_flags & OCFS2_EXT_REFCOUNTED)); in ocfs2_direct_IO_get_blocks. ocfs2_direct_IO_get_blocks is expecting the OCFS2_EXT_REFCOUNTED be removed in ocfs2_prepare_inode_for_write() if it was there. But no cluster lock is taken during the time before (or inside) ocfs2_prepare_inode_for_write() and after ocfs2_direct_IO_get_blocks(). It can happen in this case: Node A(which crashes) Node B ------------------------ --------------------------- ocfs2_file_aio_write ocfs2_prepare_inode_for_write ocfs2_inode_lock ... ocfs2_inode_unlock #no refcount found .... ocfs2_reflink ocfs2_inode_lock ... ocfs2_inode_unlock #now, refcount flag set on extent ... flush change to disk ocfs2_direct_IO_get_blocks ocfs2_get_clusters #extent map miss #buffer_head miss read extents from disk found refcount flag on extent crash.. Fix: Take rw_lock in ocfs2_reflink path Signed-off-by: Wengang Wang Reviewed-by: Mark Fasheh Cc: Joel Becker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: remove some redundant casting

2014-06-04T23:53:54Z

There are two standard techniques for dereferencing structures pointed to by void *: cast to the right type each time they're used, or assign to local variables of the right type. But there's no need to do *both*. Signed-off-by: George Spelvin Cc: Mark Fasheh Acked-by: Joel Becker Reviewed-by: Jie Liu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: use generic posix ACL infrastructure

2014-01-26T04:58:21Z

This contains some major refactoring for the create path so that inodes are created with the right mode to start with instead of fixing it up later. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

ocfs2: add necessary check in case sb_getblk() fails

2013-11-13T03:09:00Z

sb_getblk() may return an err, so add a check for bh. [joseph.qi@huawei.com: also add a check after calling sb_getblk() in ocfs2_create_xattr_block()] Signed-off-by: Rui Xiang Reviewed-by: Jie Liu Reviewed-by: Mark Fasheh Cc: Joel Becker Cc: Joseph Qi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: return ENOMEM when sb_getblk() fails

2013-11-13T03:09:00Z

The only reason for sb_getblk() failing is if it can't allocate the buffer_head. So return ENOMEM instead when it fails. [joseph.qi@huawei.com: ocfs2_symlink_get_block() and ocfs2_read_blocks_sync() and ocfs2_read_blocks() need the same change] Signed-off-by: Rui Xiang Reviewed-by: Jie Liu Reviewed-by: Mark Fasheh Cc: Joel Becker Cc: Joseph Qi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fs/ocfs2: remove unnecessary variable bits_wanted from ocfs2_calc_extend_credits

2013-11-13T03:09:00Z

Code cleanup to remove unnecessary variable passed but never used to ocfs2_calc_extend_credits. Signed-off-by: Goldwyn Rodrigues Cc: Joel Becker Cc: Mark Fasheh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: add missing return value check of ocfs2_get_clusters()

2013-09-11T22:56:44Z

In ocfs2_attach_refcount_tree() and ocfs2_duplicate_extent_list(), if error occurs when calling ocfs2_get_clusters(), it will go with unexpected behavior as local variables p_cluster, num_clusters and ext_flags are declared without initialization. Signed-off-by: Joseph Qi Reviewed-by: Jie Liu Cc: Joel Becker Cc: Mark Fasheh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ocfs2: fix NULL pointer dereference in ocfs2_duplicate_clusters_by_page

2013-08-14T00:57:49Z

Since ocfs2_cow_file_pos will invoke ocfs2_refcount_icow with a NULL as the struct file pointer, it finally result in a null pointer dereference in ocfs2_duplicate_clusters_by_page. This patch replace file pointer with inode pointer in cow_duplicate_clusters to fix this issue. [jeff.liu@oracle.com: rebased patch against linux-next tree] Signed-off-by: Tiger Yang Signed-off-by: Jie Liu Cc: Joel Becker Cc: Mark Fasheh Acked-by: Tao Ma Tested-by: David Weber Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds