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path: root/drivers/scsi/scsi_lib.c
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2005-10-28[PATCH] gfp_t: drivers/scsiAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-16[SCSI] Fix leak of Scsi_CmndsAlan Stern
When a request is deferred in scsi_init_io because the sg table could not be allocated, the associated scsi_cmnd is not released and the request is not marked with REQ_DONTPREP. When the command is retried, if scsi_prep_fn decides to kill it then the scsi_cmnd will never be released. This patch (as573) changes scsi_init_io so that it calls scsi_put_command before deferring a request. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-19[SCSI] fix oops on usb storage device disconnectJames Bottomley
We fix the oops by enforcing the host state model. There have also been two extra states added: SHOST_CANCEL_RECOVERY and SHOST_DEL_RECOVERY so we can take the model through host removal while the recovery thread is active. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-17[SCSI] fix oops in scsi_release_buffers()Alan Stern
I found one other thing that needs to be fixed. The call to scsi_release_buffers in scsi_unprep_request causes an oops, because the sgtable has already been freed in scsi_io_completion. The following patch is needed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-14[SCSI] fix sym scsi boot hangJames Bottomley
On Wed, 2005-09-14 at 18:06 +1000, Anton Blanchard wrote: > And in particular it looks like the scsi_unprep_request in > scsi_queue_insert is causing it. The following patch fixes the boot > problems on the vscsi machine: OK, my fault. Your fix is almost correct .. I was going to do this eventually, honest, because there's no need to unprep and reprep a command that comes in through scsi_queue_insert(). However, I decided to leave it in to exercise the scsi_unprep_request() path just to make sure it was working. What's happening, I think, is that we also use this path for retries. Since we kill and reget the command each time, the retries decrement is never seen, so we're retrying forever. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-14[SCSI] scsi: sd, sr, st, and scsi_lib all fail to copy cmd_len to new cmdTimothy Thelin
This fixes an issue in scsi command initialization from a request where sd, sr, st, and scsi_lib all fail to copy the request's cmd_len to the scsi command's cmd_len field. Signed-off-by: Timothy Thelin <timothy.thelin@wdc.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-10[SCSI] set error value when failing commands in prep_fnMike Christie
set DID_NO_CONNECT for the BLKPREP_KILL case and correct a few BLKPREP_DEFER cases that weren't checking for the need to plug the queue. Signed-Off-By: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-09[SCSI] SCSI core: fix leakage of scsi_cmnd'sJames Bottomley
Actually, just one problem and one cosmetic fix: 1) We need to dequeue for the loop and kill case (it seems easiest simply to dequeue in the scsi_kill_request() routine) 2) There's no real need to drop the queue lock. __scsi_done() is lock agnostic, so since there's no requirement, let's just leave it in to avoid any locking issues. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-09[SCSI] SCSI core: fix leakage of scsi_cmnd'sJames Bottomley
From: Alan Stern <stern@rowland.harvard.edu> This patch (as559b) adds a new routine, scsi_unprep_request, which gets called every place a request is requeued. (That includes scsi_queue_insert as well as scsi_requeue_command.) It also changes scsi_kill_requests to make it call __scsi_done with result equal to DID_NO_CONNECT << 16. (I'm not sure if it's necessary to call scsi_init_cmd_errh here; maybe you can check on that.) Finally, the patch changes the return value from scsi_end_request, to avoid returning a stale pointer in the case where the request was requeued. Fortunately the return value is used in only place, and the change actually simplified it. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-09[SCSI] fix possible deadlock in scsi_lib.cNeil Brown
If a filesystem, while writing out data, decides that it is good to issue a cache flush on a SCSI drive (or other 'sd' device), it will call blkdev_issue_flush which calls ->issue_flush_fn which is scsi_issue_flush_fn. This calls sd_issue_flush which calls sd_sync_cache, which calls scsi_execute_request. This will (as sshdr != NULL) call kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL) If memory is tight, the presence of GFP_KERNEL may cause write requests to be sent to some filesystem to free up memory, however if that filesystem is waiting for the issue_flush_fn to complete, you could get a deadlock. I wonder if it might be more appropriate to use GFP_NOIO as in the following patch. I wonder if it might be even more appropriate to cope better with a kmalloc failure, especially as in this use, sd_sync_cache only will use the sense information to print out a more informative error message. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-09-06[SCSI] quieten messages on scsi_execute commandsJames Bottomley
scsi_io_completion() can be a bit noisy about certain conditions. Previously this wasn't a problem for internally generated commands, since they never hit it. However, since we do all SCSI commands via bios, now they do. user CD testers like magicdev are now getting not ready messages every time they touch the CD to see if there's anything in it. Fix this by making all scsi_execute commands REQ_QUIET and making scsi_finish_io() not say anything for REQ_QUIET. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] fix sense buffer length handling problemJames Bottomley
The new bio code was incorrectly converted from stack allocated to kmalloc'd buffer handling. There are two places where it incorrectly uses sizeof(*sense) to get the size of the sense buffer. This actually produces one, so no sense data was ever getting back, causing failure in things like disk spin up. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] fix C syntax problem in scsi_lib.cakpm@osdl.org
Older gcc's require variable definitions at the beginning of a block. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] convert sd to scsi_execute_req (and update the scsi_execute_req API)James Bottomley
This one removes struct scsi_request entirely from sd. In the process, I noticed we have no callers of scsi_wait_req who don't immediately normalise the sense, so I updated the API to make it take a struct scsi_sense_hdr instead of simply a big sense buffer. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] convert SPI transport class to scsi_executeJames Bottomley
This one's slightly more difficult. The transport class uses REQ_FAILFAST, so another interface (scsi_execute) had to be invented to take the extra flag. Also, the sense functions are shifted around to allow spi_execute to place data directly into a struct scsi_sense_hdr. With this change, there's probably a lot of unnecessary sense buffer allocation going on which we can fix later. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] convert the remaining mid-layer pieces to scsi_execute_reqJames Bottomley
After this, we just have some drivers, all the ULDs and the SPI transport class using scsi_wait_req(). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28Merge HEAD from ../scsi-misc-2.6-tmp James Bottomley
2005-08-28[SCSI] use scatter lists for all block pc requests and simplify hw handlersJames Bottomley
Original From: Mike Christie <michaelc@cs.wisc.edu> Add scsi_execute_req() as a replacement for scsi_wait_req() Fixed up various pieces (added REQ_SPECIAL and caught req use after free) Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28update scsi_wait_req to new format for blk_rq_map_kern()James Bottomley
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-08-28[SCSI] use scatter lists for all block pc requests and simplify hw handlersJames Bottomley
Here's the proof of concept for this one. It converts scsi_wait_req to do correct REQ_BLOCK_PC submission (and works nicely in my setup). The final goal should be to eliminate struct scsi_request, but that can't be done until the character submission paths of sg and st are also modified. There's some loss of functionality to this: retries are no longer controllable (except by setting REQ_FASTFAIL) and the wait_req API needs to be altered, but it looks very nice. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-07-30[SCSI] host state model update: replace old host bitmap stateMike Anderson
Migrate the current SCSI host state model to a model like SCSI device is using. Signed-off-by: Mike Anderson <andmike@us.ibm.com> Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-07-26Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-for-linus-2.6Linus Torvalds
2005-07-14[SCSI] Redundant memset in scsi_alloc_sgtableChen, Kenneth W
scsi_init_io calls scsi_alloc_sgtable and then calls blk_rq_map_sg to initialize the scatterlist structure. blk_rq_map_sg() already memset the structure for every new segment. That makes the memset in scsi_alloc_sgtable unnecessary. Patch to delete the extra memset in scsi_alloc_sgtable. Tested on a x86_64 machine. Looks stable to me. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-06-28[PATCH] coverity: i386: scsi_lib buffer overrun fixKAMBAROV, ZAUR
The check in 627 BUG_ON(index > SG_MEMPOOL_NR); with SG_MEMPOOL_NR defined in 32 #define SG_MEMPOOL_NR (sizeof(scsi_sg_pools)/sizeof(struct scsi_host_sg_pool)) was not sufficient. sgp, set in 629 sgp = scsi_sg_pools + index; is dereferenced in 630 mempool_free(sgl, sgp->pool); Signed-off-by: Zaur Kambarov <zkambarov@coverity.com> Cc: <linux-scsi@vger.kernel.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-26[SCSI] remove scsi_cmnd->stateChristoph Hellwig
We never look at it except for the old megaraid driver that abuses it for sending internal commands. That usage can be fixed easily because those internal commands are single-threaded by a mutex and we can easily use a completion there. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-06-26[SCSI] remove scsi_cmnd->ownerChristoph Hellwig
never checked anywhere Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-06-26[SCSI] remove scsi_cmnd->abort_reasonChristoph Hellwig
Never used for anything but printing it out in debug routines. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-06-24[PATCH] make various thing staticAdrian Bunk
Another rollup of patches which give various symbols static scope Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-20[SCSI] remove a timer race in scsi_queue_insert()Tejun Heo
scsi_queue_insert() has four callers. Three callers call with timer disabled and one (the second invocation in scsi_dispatch_cmd()) calls with timer activated. scsi_queue_insert() used to always call scsi_delete_timer() and ignore the return value. This results in race with timer expiration. Remove scsi_delete_timer() call from scsi_queue_insert() and make the caller delete timer and check the return value. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] make scsi_queue_insert() use blk_requeue_request()Tejun Heo
scsi_queue_insert() used to use blk_insert_request() for requeueing requests. This depends on the unobvious behavior of blk_insert_request() setting REQ_SPECIAL and REQ_SOFTBARRIER when requeueing. This patch makes scsi_queue_insert() use blk_requeue_request(). As REQ_SPECIAL means special requests and REQ_SOFTBARRIER is automatically handled by blk layer now, no flag needs to be set. Note that scsi_queue_insert() now calls scsi_run_queue() itself, and the prototype of the function is added right above scsi_queue_insert(). This is temporary, as later requeue path consolidation patchset removes scsi_queue_insert(). By adding temporary prototype, we can do away with unnecessarily moving functions. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] make scsi_requeue_request() use blk_requeue_request()Tejun Heo
scsi_requeue_request() used to use blk_insert_request() for requeueing requests. This depends on the unobvious behavior of blk_insert_request() setting REQ_SPECIAL and REQ_SOFTBARRIER when requeueing. This patch makes scsi_queue_insert() use blk_requeue_request(). As REQ_SPECIAL means special requests and REQ_SOFTBARRIER is automatically handled by blk layer now, no flag needs to be set. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] remove requeue feature from blk_insert_request()Tejun Heo
blk_insert_request() has a unobivous feature of requeuing a request setting REQ_SPECIAL|REQ_SOFTBARRIER. SCSI midlayer was the only user and as previous patches removed the usage, remove the feature from blk_insert_request(). Only special requests should be queued with blk_insert_request(). All requeueing should go through blk_requeue_request(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] remove REQ_SPECIAL in scsi_init_io()Tejun Heo
scsi_init_io() used to set REQ_SPECIAL when it fails sg allocation before requeueing the request by returning BLKPREP_DEFER. REQ_SPECIAL is being updated to mean special requests. So, remove REQ_SPECIAL setting. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-18merge by hand (scsi_device.h)James Bottomley
2005-04-18[PATCH] scsi: remove meaningless scsi_cmnd->serial_number_at_timeout field
scsi_cmnd->serial_number_at_timeout doesn't serve any purpose anymore. All serial_number == serial_number_at_timeout tests are always true in abort callbacks. Kill the field. Also, as ->pid always equals ->serial_number and ->serial_number doesn't have any special meaning anymore, update comments above ->serial_number accordingly. Once we remove all uses of this field from all lldd's, this field should go. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-18[PATCH] scsi: remove unused scsi_cmnd->internal_timeout field
scsi_cmnd->internal_timeout field doesn't have any meaning anymore. Kill the field. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-16[PATCH] fix NMI lockup with CFQ scheduler
The current problem seen is that the queue lock is actually in the SCSI device structure, so when that structure is freed on device release, we go boom if the queue tries to access the lock again. The fix here is to move the lock from the scsi_device to the queue. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!