7dc71949f2
The comment in zfs_close states that "Under Linux the zfs_close() hook is not symmetric with zfs_open()". This is not true. zfs_open/zfs_close is associated with every successful struct file creation/deletion, which should always be balanced. Here is an example of what's wrong: Process A B open(O_SYNC) z_sync_cnt = 1 open(O_SYNC) z_sync_cnt = 2 close() z_sync_cnt = 0 So z_sync_cnt is 0 even if B still has the file with O_SYNC. Also moves the generic_file_open call before zfs_open to ensure that in the case generic_file_open fails z_sync_cnt is not incremented. This is safe because generic_file_open has no side effects. Signed-off-by: Chunwei Chen <tuxoko@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #1962 |
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