25 Nov, 2014
1 commit
-
There is no reason for ULDs to pass in a flag on how to allocate the S/G
lists. While we don't need GFP_ATOMIC for the blk-mq case because we
don't hold locks, that decision can be made way down the chain without
having to pass a pointless gfp_mask argument.Signed-off-by: Christoph Hellwig
Reviewed-by: Bart Van Assche
Reviewed-by: Hannes Reinecke
12 Nov, 2014
1 commit
-
Currently scsi piggy backs on the block layer to define the concept
of a tagged command. But we want to be able to have block-level host-wide
tags assigned even for untagged commands like the initial INQUIRY, so add
a new SCSI-level flag for commands that are tagged at the scsi level, so
that even commands without that set can have tags assigned to them. Note
that this alredy is the case for the blk-mq code path, and this just lets
the old path catch up with it.We also set this flag based upon sdev->simple_tags instead of the block
queue flag, so that it is entirely independent of the block layer tagging,
and thus always correct even if a driver doesn't use block level tagging
yet.Also remove the old blk_rq_tagged; it was only used by SCSI drivers, and
removing it forces them to look for the proper replacement.Signed-off-by: Christoph Hellwig
Reviewed-by: Mike Christie
Reviewed-by: Martin K. Petersen
Reviewed-by: Hannes Reinecke
01 Oct, 2014
1 commit
-
A set of flags introduced in the block layer enable better control over
how protection information is handled. These flags are useful for both
error injection and data recovery purposes. Checking can be enabled and
disabled for controller and disk, and the guard tag format is now a
per-I/O property.Update sd_protect_op to communicate the relevant information to the
low-level device driver via a set of flags in scsi_cmnd.Signed-off-by: Martin K. Petersen
Reviewed-by: Sagi Grimberg
Acked-by: Christoph Hellwig
Signed-off-by: Jens Axboe
18 Jul, 2014
1 commit
-
Signed-off-by: Christoph Hellwig
Reviewed-by: Paolo Bonzini
Reviewed-by: Hannes Reinecke
04 Jul, 2014
1 commit
-
Commit 8846bab180fa introduced a helper that can be used to query the
wire transfer size for a SCSI command taking protection information into
account.However, some commands do not have a 1:1 mapping between the block range
they work on and the payload size (discard, write same). After the
scatterlist has been set up these requests use __data_len to store the
number of bytes to report completion on. This means that callers of
scsi_transfer_length() would get the wrong byte count for these types of
requests.To overcome this we make scsi_transfer_length() use the scatterlist
length in the scsi_data_buffer as basis for the wire transfer
calculation instead of __data_len.Reported-by: Christoph Hellwig
Debugged-by: Mike Christie
Signed-off-by: Martin K. Petersen
Signed-off-by: Christoph Hellwig
Reviewed-by: Sagi Grimberg
Fixes: d77e65350f2d82dfa0557707d505711f5a43c8fd
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley
13 Jun, 2014
1 commit
-
Pull SCSI target updates from Nicholas Bellinger:
"The highlights this round include:- Add support for T10 PI pass-through between vhost-scsi +
virtio-scsi (MST + Paolo + MKP + nab)
- Add support for T10 PI in qla2xxx target mode (Quinn + MKP + hch +
nab, merged through scsi.git)
- Add support for percpu-ida pre-allocation in qla2xxx target code
(Quinn + nab)
- A number of iser-target fixes related to hardening the network
portal shutdown path (Sagi + Slava)
- Fix response length residual handling for a number of control CDBs
(Roland + Christophe V.)
- Various iscsi RFC conformance fixes in the CHAP authentication path
(Tejas and Calsoft folks + nab)
- Return TASK_SET_FULL status for tcm_fc(FCoE) DataIn + Response
failures (Vasu + Jun + nab)
- Fix long-standing ABORT_TASK + session reset hang (nab)
- Convert iser-initiator + iser-target to include T10 bytes into EDTL
(Sagi + Or + MKP + Mike Christie)
- Fix NULL pointer dereference regression related to XCOPY introduced
in v3.15 + CC'ed to v3.12.y (nab)"* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (34 commits)
target: Fix NULL pointer dereference for XCOPY in target_put_sess_cmd
vhost-scsi: Include prot_bytes into expected data transfer length
TARGET/sbc,loopback: Adjust command data length in case pi exists on the wire
libiscsi, iser: Adjust data_length to include protection information
scsi_cmnd: Introduce scsi_transfer_length helper
target: Report correct response length for some commands
target/sbc: Check that the LBA and number of blocks are correct in VERIFY
target/sbc: Remove sbc_check_valid_sectors()
Target/iscsi: Fix sendtargets response pdu for iser transport
Target/iser: Fix a wrong dereference in case discovery session is over iser
iscsi-target: Fix ABORT_TASK + connection reset iscsi_queue_req memory leak
target: Use complete_all for se_cmd->t_transport_stop_comp
target: Set CMD_T_ACTIVE bit for Task Management Requests
target: cleanup some boolean tests
target/spc: Simplify INQUIRY EVPD=0x80
tcm_fc: Generate TASK_SET_FULL status for response failures
tcm_fc: Generate TASK_SET_FULL status for DataIN failures
iscsi-target: Reject mutual authentication with reflected CHAP_C
iscsi-target: Remove no-op from iscsit_tpg_del_portal_group
iscsi-target: Fix CHAP_A parameter list handling
...
12 Jun, 2014
1 commit
-
In case protection information exists on the wire
scsi transports should include it in the transfer
byte count (even if protection information does not
exist in the host memory space). This helper will
compute the total transfer length from the scsi
command data length and protection attributes.Signed-off-by: Sagi Grimberg
Signed-off-by: Martin K. Petersen
Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Nicholas Bellinger
20 May, 2014
1 commit
-
Taken almost entirely from Nicholas Bellinger's scsi-mq conversion.
Signed-off-by: Christoph Hellwig
Acked-by: Paolo Bonzini
Reviewed-by: Nicholas Bellinger
27 Mar, 2014
1 commit
-
We don't use the passed in scsi command for anything, so just add a adapter-
wide internal status to go along with the internal scb that is used unter
int_mtx to pass back the return value and get rid of all the complexities
and abuse of the scsi_cmnd structure.This gets rid of the only user of scsi_allocate_command/scsi_free_command,
which can now be removed.[jejb: checkpatch fixes]
Signed-off-by: Christoph Hellwig
Acked-by: Adam Radford
Signed-off-by: James Bottomley
16 Mar, 2014
1 commit
-
Many callers won't need this and we can optimize them away. In addition
the handling in the __-prefixed variants was inconsistant to start with.Based on an earlier patch from Bart Van Assche.
[jejb: fix kerneldoc probelm picked up by Fengguang Wu]
Signed-off-by: Christoph Hellwig
Reviewed-by: Hannes Reinecke
Signed-off-by: James Bottomley
19 Dec, 2013
1 commit
-
When a command runs into a timeout we need to send an 'ABORT TASK'
TMF. This is typically done by the 'eh_abort_handler' LLDD callback.Conceptually, however, this function is a normal SCSI command, so
there is no need to enter the error handler.This patch implements a new scsi_abort_command() function which
invokes an asynchronous function scsi_eh_abort_handler() to
abort the commands via the usual 'eh_abort_handler'.If abort succeeds the command is either retried or terminated,
depending on the number of allowed retries. However, 'eh_eflags'
records the abort, so if the retry would fail again the
command is pushed onto the error handler without trying to
abort it (again); it'll be cleared up from SCSI EH.[hare: smatch detected stray switch fixed]
Signed-off-by: Hannes Reinecke
Signed-off-by: James Bottomley
09 Oct, 2012
1 commit
-
This patch tries to shorten the path length of scsi_cmd_to_driver(). As only
REQ_TYPE_BLOCK_PC commands can be submitted without a driver, so we could
avoid the related NULL checking, as long as we make sure we don't use it for
REQ_TYPE_BLOCK_PC type commands. Plus, this fixes a bug where you get
different behaviors from REQ_TYPE_BLOCK_PC commands when a driver is and isn't
attached.Signed-off-by: Li Zhong
Reviewed-by: Martin K. Petersen
Signed-off-by: James Bottomley
08 Jul, 2012
1 commit
-
Avoid crashing if the private_data pointer happens to be NULL. This has
been seen sometimes when a host reset happens, notably when there are
many LUNs:host3: Assigned Port ID 0c1601
scsi host3: libfc: Host reset succeeded on port (0c1601)
BUG: unable to handle kernel NULL pointer dereference at 0000000000000350
IP: [] scsi_send_eh_cmnd+0x58/0x3a0Process scsi_eh_3 (pid: 4144, threadinfo ffff88030920c000, task ffff880326b160c0)
Stack:
000000010372e6ba 0000000000000282 000027100920dca0 ffffffffa0038ee0
0000000000000000 0000000000030003 ffff88030920dc80 ffff88030920dc80
00000002000e0000 0000000a00004000 ffff8803242f7760 ffff88031326ed80
Call Trace:
[] ? lock_timer_base+0x70/0x70
[] scsi_eh_tur+0x3e/0xc0
[] scsi_eh_test_devices+0x76/0x170
[] scsi_eh_host_reset+0x85/0x160
[] scsi_eh_ready_devs+0x91/0x110
[] scsi_unjam_host+0xed/0x1f0
[] scsi_error_handler+0x1a8/0x200
[] ? scsi_unjam_host+0x1f0/0x1f0
[] kthread+0x9e/0xb0
[] kernel_thread_helper+0x4/0x10
[] ? kthread_freezable_should_stop+0x70/0x70
[] ? gs_change+0x13/0x13
Code: 25 28 00 00 00 48 89 45 c8 31 c0 48 8b 87 80 00 00 00 48 8d b5 60 ff ff ff 89 d1 48 89 fb 41 89 d6 4c 89 fa 48 8b 80 b8 00 00 00
8b 80 50 03 00 00 48 8b 00 48 89 85 38 ff ff ff 48 8b 07 4c
RIP [] scsi_send_eh_cmnd+0x58/0x3a0
RSP
CR2: 0000000000000350Signed-off-by: Mark Rustad
Tested-by: Marcus Dennis
Cc:
Signed-off-by: James Bottomley
16 Apr, 2012
1 commit
-
Commit 18a4d0a22ed6 ("[SCSI] Handle disk devices which can not process
medium access commands") introduced a bug in which we would attempt to
dereference the scsi driver even when the device had no ULD attached.Ensure that a driver is registered and make the driver accessor function
more resilient to errors during device discovery.Reported-by: Elric Fu
Reported-by: Bart Van Assche
Signed-off-by: Martin K. Petersen
Signed-off-by: Linus Torvalds
20 Feb, 2012
1 commit
-
We have experienced several devices which fail in a fashion we do not
currently handle gracefully in SCSI. After a failure these devices will
respond to the SCSI primary command set (INQUIRY, TEST UNIT READY, etc.)
but any command accessing the storage medium will time out.The following patch adds an callback that can be used by upper level
drivers to inspect the results of an error handling command. This in
turn has been used to implement additional checking in the SCSI disk
driver.If a medium access command fails twice but TEST UNIT READY succeeds both
times in the subsequent error handling we will offline the device. The
maximum number of failed commands required to take a device offline can
be tweaked in sysfs.Also add a new error flag to scsi_debug which allows this scenario to be
easily reproduced.[jejb: fix up integer parsing to use kstrtouint]
Signed-off-by: Martin K. Petersen
Signed-off-by: James Bottomley
19 Feb, 2012
1 commit
-
Resubmitting as my previous post had format issues and did not go llinux-scsi.
This patch changes the function to set_msg_byte, set_host_byte and
set_driver_byte to correctly set the corresponding bytes appropriately.It will reset the original setting and correctly set it to the new value. The
previous OR operation does not always set it back to new value. Look at patch
2/2 for an example.Signed-off-by: Babu Moger
Signed-off-by: James Bottomley
02 Oct, 2009
1 commit
-
The checksum format is orthogonal to whether the protection information
is being passed on beyond the HBA or not. It is perfectly valid to use
a non-T10 CRC with WRITE_STRIP and READ_INSERT.Consequently it no longer makes sense to explicitly refer to the
conversion in the protection operation. Update sd_dif and lpfc
accordingly.Signed-off-by: Martin K. Petersen
Acked-by: Ihab Hamadi
Signed-off-by: James Bottomley
11 May, 2009
1 commit
-
With recent cleanups, there is no place where low level driver
directly manipulates request fields. This means that the 'hard'
request fields always equal the !hard fields. Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.While at it, drop superflous blk_rq_pos() < 0 test in swim.c.
[ Impact: use pos and nr_sectors accessors ]
Signed-off-by: Tejun Heo
Acked-by: Geert Uytterhoeven
Tested-by: Grant Likely
Acked-by: Grant Likely
Tested-by: Adrian McMenamin
Acked-by: Adrian McMenamin
Acked-by: Mike Miller
Cc: James Bottomley
Cc: Bartlomiej Zolnierkiewicz
Cc: Borislav Petkov
Cc: Sergei Shtylyov
Cc: Eric Moore
Cc: Alan Stern
Cc: FUJITA Tomonori
Cc: Pete Zaitcev
Cc: Stephen Rothwell
Cc: Paul Clements
Cc: Tim Waugh
Cc: Jeff Garzik
Cc: Jeremy Fitzhardinge
Cc: Alex Dubov
Cc: David Woodhouse
Cc: Martin Schwidefsky
Cc: Dario Ballabio
Cc: David S. Miller
Cc: Rusty Russell
Cc: unsik Kim
Cc: Laurent Vivier
Signed-off-by: Jens Axboe
13 Mar, 2009
1 commit
-
This allows it to compile and be used on the ps3 platform that wants
to use the #define values in scsi.h without actually having
CONFIG_SCSI set.Signed-off-by: James Bottomley
09 Oct, 2008
1 commit
-
Right now SCSI and others do their own command timeout handling.
Move those bits to the block layer.Instead of having a timer per command, we try to be a bit more clever
and simply have one per-queue. This avoids the overhead of having to
tear down and setup a timer for each command, so it will result in a lot
less timer fiddling.Signed-off-by: Mike Anderson
Signed-off-by: Jens Axboe
27 Jul, 2008
2 commits
-
Implement support for DMA of protection information for devices that
are data integrity capable.- Add support for mapping an extra scatter-gather list containing
the protection information.- Allocate protection scsi_data_buffer if host is DIX (integrity DMA)
capable.- Accessor function for checking whether a device has protection
enabled.Signed-off-by: Martin K. Petersen
Signed-off-by: James Bottomley -
Controllers that support DMA of protection information must be told
explicitly how to handle the I/O. The controller has no knowledge of
the protection capabilities of the target device so this information
must be passed in the scsi_cmnd.- The protection operation tells the HBA whether to generate, strip or
verify protection information.- The protection type tells the HBA which layout the target is
formatted with. This is necessary because the controller must be
able to correctly interpret the included protection information in
order to verify it.- When a scsi_cmnd is reused for error handling the protection
operation must be cleared and saved while error handling is in
progress.- prot_op and prot_type are placed in an existing hole in scsi_cmnd
and don't cause the structure to grow.Signed-off-by: Martin K. Petersen
Signed-off-by: James Bottomley
12 Jul, 2008
1 commit
-
Signed-off-by: Alexander Beregalov
Signed-off-by: James Bottomley
03 May, 2008
1 commit
-
Add support for variable-length, extended, and vendor specific
CDBs to scsi-ml. It is now possible for initiators and ULD's
to issue these types of commands. LLDs need not change much.
All they need is to raise the .max_cmd_len to the longest command
they support (see iscsi patch).- clean-up some code paths that did not expect commands to be
larger than 16, and change cmd_len members' type to short as
char is not enough.Signed-off-by: Boaz Harrosh
Signed-off-by: Benny Halevy
Signed-off-by: James Bottomley
02 May, 2008
1 commit
-
- struct scsi_cmnd had a 16 bytes command buffer of its own.
This is an unnecessary duplication and copy of request's
cmd. It is probably left overs from the time that scsi_cmnd
could function without a request attached. So clean that up.- Once above is done, few places, apart from scsi-ml, needed
adjustments due to changing the data type of scsi_cmnd->cmnd.- Lots of drivers still use MAX_COMMAND_SIZE. So I have left
that #define but equate it to BLK_MAX_CDB. The way I see it
and is reflected in the patch below is.
MAX_COMMAND_SIZE - means: The longest fixed-length (*) SCSI CDB
as per the SCSI standard and is not related
to the implementation.
BLK_MAX_CDB. - The allocated space at the request level- I have audit all ISA drivers and made sure none use ->cmnd in a DMA
Operation. Same audit was done by Andi Kleen.(*)fixed-length here means commands that their size can be determined
by their opcode and the CDB does not carry a length specifier, (unlike
the VARIABLE_LENGTH_CMD(0x7f) command). This is actually not exactly
true and the SCSI standard also defines extended commands and
vendor specific commands that can be bigger than 16 bytes. The kernel
will support these using the same infrastructure used for VARLEN CDB's.
So in effect MAX_COMMAND_SIZE means the maximum size command
scsi-ml supports without specifying a cmd_len by ULD'sSigned-off-by: Boaz Harrosh
Signed-off-by: James Bottomley
08 Apr, 2008
2 commits
-
This is needed by things like USB storage that want to set up static
commands for later use at start of day.Signed-off-by: James Bottomley
-
LLDs need to copies data between the SG table in struct scsi_cmnd and
liner buffer. So they use the helper functions likesg_copy_from_buffer(scsi_sglist(sc), scsi_sg_count(sc), buf, buflen)
sg_copy_to_buffer(scsi_sglist(sc), scsi_sg_count(sc), buf, buflen)This patch just adds wrapper functions:
scsi_sg_copy_from_buffer(sc, buf, buflen)
scsi_sg_copy_to_buffer(sc, buf, buflen)Signed-off-by: FUJITA Tomonori
Signed-off-by: James Bottomley
31 Jan, 2008
3 commits
-
At the block level bidi request uses req->next_rq pointer for a second
bidi_read request.
At Scsi-midlayer a second scsi_data_buffer structure is used for the
bidi_read part. This bidi scsi_data_buffer is put on
request->next_rq->special. Struct scsi_cmnd is not changed.- Define scsi_bidi_cmnd() to return true if it is a bidi request and a
second sgtable was allocated.- Define scsi_in()/scsi_out() to return the in or out scsi_data_buffer
from this command This API is to isolate users from the mechanics of
bidi.- Define scsi_end_bidi_request() to do what scsi_end_request() does but
for a bidi request. This is necessary because bidi commands are a bit
tricky here. (See comments in body)- scsi_release_buffers() will also release the bidi_read scsi_data_buffer
- scsi_io_completion() on bidi commands will now call
scsi_end_bidi_request() and return.- The previous work done in scsi_init_io() is now done in a new
scsi_init_sgtable() (which is 99% identical to old scsi_init_io())
The new scsi_init_io() will call the above twice if needed also for
the bidi_read command. Only at this point is a command bidi.- In scsi_error.c at scsi_eh_prep/restore_cmnd() make sure bidi-lld is not
confused by a get-sense command that looks like bidi. This is done
by puting NULL at request->next_rq, and restoring.[jejb: update to sg_table and resolve conflicts
also update to blk-end-request and resolve conflicts]Signed-off-by: Boaz Harrosh
Signed-off-by: James Bottomley -
In preparation for bidi we abstract all IO members of scsi_cmnd,
that will need to duplicate, into a substructure.- Group all IO members of scsi_cmnd into a scsi_data_buffer
structure.
- Adjust accessors to new members.
- scsi_{alloc,free}_sgtable receive a scsi_data_buffer instead of
scsi_cmnd. And work on it.
- Adjust scsi_init_io() and scsi_release_buffers() for above
change.
- Fix other parts of scsi_lib/scsi.c to members migration. Use
accessors where appropriate.- fix Documentation about scsi_cmnd in scsi_host.h
- scsi_error.c
* Changed needed members of struct scsi_eh_save.
* Careful considerations in scsi_eh_prep/restore_cmnd.- sd.c and sr.c
* sd and sr would adjust IO size to align on device's block
size so code needs to change once we move to scsi_data_buff
implementation.
* Convert code to use scsi_for_each_sg
* Use data accessors where appropriate.- tgt: convert libsrp to use scsi_data_buffer
- isd200: This driver still bangs on scsi_cmnd IO members,
so need changing[jejb: rebased on top of sg_table patches fixed up conflicts
and used the synergy to eliminate use_sg and sg_count]Signed-off-by: Boaz Harrosh
Signed-off-by: FUJITA Tomonori
Signed-off-by: James Bottomley -
If we export scsi_init_io()/scsi_release_buffers() instead of
scsi_{alloc,free}_sgtable() from scsi_lib than tgt code is much more
insulated from scsi_lib changes. As a bonus it will also gain bidi
capability when it comes.[jejb: rebase on to sg_table and fix up rejections]
Signed-off-by: Boaz Harrosh
Acked-by: FUJITA Tomonori
Signed-off-by: Andrew Morton
Signed-off-by: James Bottomley
28 Jan, 2008
1 commit
-
Also change scsi_alloc_sgtable() to just return 0/failure, since it
maps to the command passed in. ->request_buffer is now no longer needed,
once drivers are adapted to use scsi_sglist() it can be killed.Signed-off-by: Jens Axboe
24 Jan, 2008
1 commit
-
This removes static array sense_buffer in scsi_cmnd and uses
dynamically allocated sense_buffer (with GFP_DMA).The reason for doing this is that some architectures need cacheline
aligned buffer for DMA:http://lkml.org/lkml/2007/11/19/2
The problems are that scsi_eh_prep_cmnd puts scsi_cmnd::sense_buffer
to sglist and some LLDs directly DMA to scsi_cmnd::sense_buffer. It's
necessary to DMA to scsi_cmnd::sense_buffer safely. This patch solves
these issues.__scsi_get_command allocates sense_buffer via kmem_cache_alloc and
attaches it to a scsi_cmnd so everything just work as before.Signed-off-by: FUJITA Tomonori
Signed-off-by: James Bottomley
07 Jan, 2008
1 commit
-
This reverts commit ac40532ef0b8649e6f7f83859ea0de1c4ed08a19, which gets
us back the original cleanup of 6f5391c283d7fdcf24bf40786ea79061919d1e1d.It turns out that the bug that was triggered by that commit was
apparently not actually triggered by that commit at all, and just the
testing conditions had changed enough to make it appear to be due to it.The real problem seems to have been found by Peter Osterlund:
"pktcdvd sets it [block device size] when opening the /dev/pktcdvd
device, but when the drive is later opened as /dev/scd0, there is
nothing that sets it back. (Btw, 40944 is possible if the disk is a
CDRW that was formatted with "cdrwtool -m 10236".)The problem is that pktcdvd opens the cd device in non-blocking mode
when pktsetup is run, and doesn't close it again until pktsetup -d is
run. The effect is that if you meanwhile open the cd device,
blkdev.c:do_open() doesn't call bd_set_size() because
bdev->bd_openers is non-zero."In particular, to repeat the bug (regardless of whether commit
6f5391c283d7fdcf24bf40786ea79061919d1e1d is applied or not):" 1. Start with an empty drive.
2. pktsetup 0 /dev/scd0
3. Insert a CD containing an isofs filesystem.
4. mount /dev/pktcdvd/0 /mnt/tmp
5. umount /mnt/tmp
6. Press the eject button.
7. Insert a DVD containing a non-writable filesystem.
8. mount /dev/scd0 /mnt/tmp
9. find /mnt/tmp -type f -print0 | xargs -0 sha1sum >/dev/null
10. If the DVD contains data beyond the physical size of a CD, you
get I/O errors in the terminal, and dmesg reports lots of
"attempt to access beyond end of device" errors."which in turn is because the nested open after the media change won't
cause the size to be set properly (because the original open still holds
the block device, and we only do the bd_set_size() when we don't have
other people holding the device open).The proper fix for that is probably to just do something like
bdev->bd_inode->i_size = (loff_t)get_capacity(disk)<
Cc: James Bottomley
Cc: Matthew Wilcox
Cc: Ingo Molnar
Cc: Andrew Morton
Signed-off-by: Linus Torvalds
03 Jan, 2008
1 commit
-
This reverts commit 6f5391c283d7fdcf24bf40786ea79061919d1e1d ("[SCSI]
Get rid of scsi_cmnd->done") that was supposed to be a cleanup commit,
but apparently it causes regressions:Bug 9370 - v2.6.24-rc2-409-g9418d5d: attempt to access beyond end of device
http://bugzilla.kernel.org/show_bug.cgi?id=9370this patch should be reintroduced in a more split-up form to make
testing of it easier.Signed-off-by: Ingo Molnar
Acked-by: Matthew Wilcox
Cc: James Bottomley
Signed-off-by: Linus Torvalds
16 Oct, 2007
4 commits
-
Signed-off-by: FUJITA Tomonori
Signed-off-by: Jens Axboe -
This is what enables large commands. If we need to allocate an
sgtable that doesn't fit in a single page, allocate several
SCSI_MAX_SG_SEGMENTS sized tables and chain them together.SCSI defaults to large chained sg tables, if the arch supports it.
Signed-off-by: Jens Axboe
-
Just pass in the command, no point in passing in the scatterlist
and scatterlist pool index seperately.Signed-off-by: Jens Axboe
-
This converts the SCSI mid layer to using the sg helpers for looking up
sg elements, instead of doing it manually.Signed-off-by: Jens Axboe
13 Oct, 2007
2 commits
-
The ULD ->done callback moves into the scsi_driver. By moving the call
to scsi_io_completion() from scsi_blk_pc_done() to scsi_finish_command(),
we can eliminate the latter entirely. By returning 'good_bytes' from
the ->done callback (rather than invoking scsi_io_completion()), we can
stop exporting scsi_io_completion().Also move the prototypes from sd.h to sd.c as they're all internal anyway.
Rename sd_rw_intr to sd_done and rw_intr to sr_done.Inspired-by: Christoph Hellwig
Signed-off-by: Matthew Wilcox
Signed-off-by: James Bottomley -
The pid field is a duplicate of the serial_number field and has been
scheduled for removal for a long time. A few drivers were still using
it, so just change them to use serial_number instead.Signed-off-by: Matthew Wilcox
Signed-off-by: James Bottomley
