On 13-07-22 01:03 PM, Jörn Engel wrote:
On Mon, 22 July 2013 12:40:29 +0800, Vaughan Cao wrote:There is a race when open sg with O_EXCL flag. Also a race may happen between sg_open and sg_remove. Changes from v4: * [3/4] use ERR_PTR series instead of adding another parameter in sg_add_sfp * [4/4] fix conflict for cherry-pick from v3. Changes from v3: * release o_sem in sg_release(), not in sg_remove_sfp(). * not set exclude with sfd_lock held. Vaughan Cao (4): [SCSI] sg: use rwsem to solve race during exclusive open [SCSI] sg: no need sg_open_exclusive_lock [SCSI] sg: checking sdp->detached isn't protected when open [SCSI] sg: push file descriptor list locking down to per-device locking drivers/scsi/sg.c | 178 +++++++++++++++++++++++++----------------------------- 1 file changed, 83 insertions(+), 95 deletions(-)Patchset looks good to me, although I didn't test it on hardware yet. Signed-off-by: Joern Engel <joern@xxxxxxxxx> James, care to pick this up?
Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> Tested O_EXCL with multiple processes and threads; passed. sg driver prior to this patch had "leaky" O_EXCL logic according to the same test. Block device passed. James, could you clean this up: drivers/scsi/sg.c:242:6: warning: unused variable ‘res’ [-Wunused-variable] Doug Gilbert -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
