28 Jan, 2015
1 commit
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commit 046ba64285a4389ae5e9a7dfa253c6bff3d7c341 upstream.
This patch drops the arbitrary maximum I/O size limit in sbc_parse_cdb(),
which currently for fabric_max_sectors is hardcoded to 8192 (4 MB for 512
byte sector devices), and for hw_max_sectors is a backend driver dependent
value.This limit is problematic because Linux initiators have only recently
started to honor block limits MAXIMUM TRANSFER LENGTH, and other non-Linux
based initiators (eg: MSFT Fibre Channel) can also generate I/Os larger
than 4 MB in size.Currently when this happens, the following message will appear on the
target resulting in I/Os being returned with non recoverable status:SCSI OP 28h with too big sectors 16384 exceeds fabric_max_sectors: 8192
Instead, drop both [fabric,hw]_max_sector checks in sbc_parse_cdb(),
and convert the existing hw_max_sectors into a purely informational
attribute used to represent the granuality that backend driver and/or
subsystem code is splitting I/Os upon.Also, update FILEIO with an explicit FD_MAX_BYTES check in fd_execute_rw()
to deal with the one special iovec limitiation case.v2 changes:
- Drop hw_max_sectors check in sbc_parse_cdb()Reported-by: Lance Gropper
Reported-by: Stefan Priebe
Cc: Christoph Hellwig
Cc: Martin K. Petersen
Cc: Roland Dreier
Signed-off-by: Nicholas Bellinger
Signed-off-by: Greg Kroah-Hartman
18 Apr, 2014
1 commit
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Mostly scripted conversion of the smp_mb__* barriers.
Signed-off-by: Peter Zijlstra
Acked-by: Paul E. McKenney
Link: http://lkml.kernel.org/n/tip-55dhyhocezdw1dg7u19hmh1u@git.kernel.org
Cc: Linus Torvalds
Cc: linux-arch@vger.kernel.org
Signed-off-by: Ingo Molnar
07 Apr, 2014
1 commit
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This patch fixes a double free bug during IBLOCK backend shutdown
where bioset_integrity_free() was incorrectly called ahead of
bioset_free(), who is already making the same call directly.This bug was introduced with commit ecebbf6cc, and will end up
triggering a general protection fault in iblock_free_device()Reviewed-by: Sagi Grimberg
Cc: Martin K. Petersen
Cc: Or Gerlitz
Cc: Quinn Tran
Cc: Giridhar Malavali
Cc: #3.14+
Signed-off-by: Nicholas Bellinger
01 Feb, 2014
1 commit
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Pull SCSI target updates from Nicholas Bellinger:
"The highlights this round include:- add support for SCSI Referrals (Hannes)
- add support for T10 DIF into target core (nab + mkp)
- add support for T10 DIF emulation in FILEIO + RAMDISK backends (Sagi + nab)
- add support for T10 DIF -> bio_integrity passthrough in IBLOCK backend (nab)
- prep changes to iser-target for >= v3.15 T10 DIF support (Sagi)
- add support for qla2xxx N_Port ID Virtualization - NPIV (Saurav + Quinn)
- allow percpu_ida_alloc() to receive task state bitmask (Kent)
- fix >= v3.12 iscsi-target session reset hung task regression (nab)
- fix >= v3.13 percpu_ref se_lun->lun_ref_active race (nab)
- fix a long-standing network portal creation race (Andy)"* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (51 commits)
target: Fix percpu_ref_put race in transport_lun_remove_cmd
target/iscsi: Fix network portal creation race
target: Report bad sector in sense data for DIF errors
iscsi-target: Convert gfp_t parameter to task state bitmask
iscsi-target: Fix connection reset hang with percpu_ida_alloc
percpu_ida: Make percpu_ida_alloc + callers accept task state bitmask
iscsi-target: Pre-allocate more tags to avoid ack starvation
qla2xxx: Configure NPIV fc_vport via tcm_qla2xxx_npiv_make_lport
qla2xxx: Enhancements to enable NPIV support for QLOGIC ISPs with TCM/LIO.
qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure
IB/isert: pass scatterlist instead of cmd to fast_reg_mr routine
IB/isert: Move fastreg descriptor creation to a function
IB/isert: Avoid frwr notation, user fastreg
IB/isert: seperate connection protection domains and dma MRs
tcm_loop: Enable DIF/DIX modes in SCSI host LLD
target/rd: Add DIF protection into rd_execute_rw
target/rd: Add support for protection SGL setup + release
target/rd: Refactor rd_build_device_space + rd_release_device_space
target/file: Add DIF protection support to fd_execute_rw
target/file: Add DIF protection init/format support
...
18 Jan, 2014
1 commit
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This patch adds blk_integrity passthrough support for block_device
backends using IBLOCK.This includes iblock_alloc_bip() + setup of bio_integrity_payload
information that attaches to the leading struct bio once bio_list
is populated during fast-path iblock_execute_rw() I/O dispatch.It also updates setup in iblock_configure_device() to detect modes
of protection + se dev->dev_attrib.pi_prot_type accordingly, along
with creating required bio_set integrity mempools.Cc: Martin K. Petersen
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Sagi Grimberg
Cc: Or Gerlitz
Signed-off-by: Nicholas Bellinger
10 Jan, 2014
1 commit
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Mark function iblock_get_write_cache() as static in target_core_iblock.c
because it is not used outside this file.This eliminates the following warning in target_core_iblock.c:
drivers/target/target_core_iblock.c:766:6: warning: no previous prototype for ‘iblock_get_write_cache’ [-Wmissing-prototypes]Signed-off-by: Rashika Kheria
Reviewed-by: Josh Triplett
Signed-off-by: Nicholas Bellinger
24 Nov, 2013
1 commit
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Immutable biovecs are going to require an explicit iterator. To
implement immutable bvecs, a later patch is going to add a bi_bvec_done
member to this struct; for now, this patch effectively just renames
things.Signed-off-by: Kent Overstreet
Cc: Jens Axboe
Cc: Geert Uytterhoeven
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: "Ed L. Cashin"
Cc: Nick Piggin
Cc: Lars Ellenberg
Cc: Jiri Kosina
Cc: Matthew Wilcox
Cc: Geoff Levand
Cc: Yehuda Sadeh
Cc: Sage Weil
Cc: Alex Elder
Cc: ceph-devel@vger.kernel.org
Cc: Joshua Morris
Cc: Philip Kelleher
Cc: Rusty Russell
Cc: "Michael S. Tsirkin"
Cc: Konrad Rzeszutek Wilk
Cc: Jeremy Fitzhardinge
Cc: Neil Brown
Cc: Alasdair Kergon
Cc: Mike Snitzer
Cc: dm-devel@redhat.com
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: linux390@de.ibm.com
Cc: Boaz Harrosh
Cc: Benny Halevy
Cc: "James E.J. Bottomley"
Cc: Greg Kroah-Hartman
Cc: "Nicholas A. Bellinger"
Cc: Alexander Viro
Cc: Chris Mason
Cc: "Theodore Ts'o"
Cc: Andreas Dilger
Cc: Jaegeuk Kim
Cc: Steven Whitehouse
Cc: Dave Kleikamp
Cc: Joern Engel
Cc: Prasad Joshi
Cc: Trond Myklebust
Cc: KONISHI Ryusuke
Cc: Mark Fasheh
Cc: Joel Becker
Cc: Ben Myers
Cc: xfs@oss.sgi.com
Cc: Steven Rostedt
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Len Brown
Cc: Pavel Machek
Cc: "Rafael J. Wysocki"
Cc: Herton Ronaldo Krzesinski
Cc: Ben Hutchings
Cc: Andrew Morton
Cc: Guo Chao
Cc: Tejun Heo
Cc: Asai Thambi S P
Cc: Selvan Mani
Cc: Sam Bradshaw
Cc: Wei Yongjun
Cc: "Roger Pau Monné"
Cc: Jan Beulich
Cc: Stefano Stabellini
Cc: Ian Campbell
Cc: Sebastian Ott
Cc: Christian Borntraeger
Cc: Minchan Kim
Cc: Jiang Liu
Cc: Nitin Gupta
Cc: Jerome Marchand
Cc: Joe Perches
Cc: Peng Tao
Cc: Andy Adamson
Cc: fanchaoting
Cc: Jie Liu
Cc: Sunil Mushran
Cc: "Martin K. Petersen"
Cc: Namjae Jeon
Cc: Pankaj Kumar
Cc: Dan Magenheimer
Cc: Mel Gorman 6
13 Nov, 2013
1 commit
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In addition to block size (already implemented), passing through
alignment offset, logical-to-phys block exponent, I/O granularity and
optimal I/O length will allow initiators to properly handle layout on
LUNs with 4K block sizes.Tested with various weird values via scsi_debug module.
One thing to look at with this patch is the new block limits values --
instead of granularity 1 optimal 8192, Lio will now be returning whatever
the block device says, which may affect performance.Signed-off-by: Andy Grover
Acked-by: Martin K. Petersen
Signed-off-by: Nicholas Bellinger
11 Sep, 2013
1 commit
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Update copyright ownership/year information for target-core,
loopback, iscsi-target, tcm_qla2xx, vhost and iser-target.Signed-off-by: Nicholas Bellinger
10 Sep, 2013
1 commit
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COMPARE_AND_WRITE expects to be able to send down a DMA_FROM_DEVICE
to obtain the necessary READ payload for comparision against the
first half of the WRITE payload containing the verify user data.Currently virtual backends expect to internally reference SGLs,
SGL nents, and data_direction, so change IBLOCK, FILEIO and RD
sbc_ops->execute_rw() to accept this values as function parameters.Also add default sbc_execute_rw() handler for the typical case for
cmd->execute_rw() submission using cmd->t_data_sg, cmd->t_data_nents,
and cmd->data_direction).v2 Changes:
- Add SCF_COMPARE_AND_WRITE command flag
- Use sbc_execute_rw() for normal cmd->execute_rw() submission
with expected se_cmd members.Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Martin Petersen
Cc: Chris Mason
Cc: James Bottomley
Cc: Nicholas Bellinger
Signed-off-by: Nicholas Bellinger
13 Aug, 2013
1 commit
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The usage of strict_strtoul() and strict_strtoull() is not preferred,
because strict_strtoul() and strict_strtoull() are obsolete. Thus,
kstrtoul() and kstrtoull() should be used.v2: Fix incorrect return in ft_add_tpg (Fengguang)
Signed-off-by: Jingoo Han
Signed-off-by: Nicholas Bellinger
15 May, 2013
1 commit
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This patch fixes a regression bug introduced in v3.9-rc1 where if the
underlying struct block_device for a IBLOCK backend is configured with
WCE=1 + DPOFUA=1 settings, the rw = WRITE assignment no longer occurs
in iblock_execute_rw(), and rw = 0 is passed to iblock_submit_bios()
in effect causing a READ bio operation to occur.The offending commit is:
commit d0c8b259f8970d39354c1966853363345d401330
Author: Nicholas Bellinger
Date: Tue Jan 29 22:10:06 2013 -0800target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status
Note the WCE=1 + DPOFUA=0, WCE=0 + DPOFUA=1, and WCE=0 + DPOFUA=0 cases
are not affected by this regression bug.Reported-by: Chris Boot
Tested-by: Chris Boot
Reported-by: Hannes Reinecke
Cc:
Signed-off-by: Nicholas Bellinger
25 Apr, 2013
2 commits
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iblock_execute_unmap() and fd_execute_unmap share a lot of code.
Add sbc_execute_unmap() helper to remove duplicated code for
iblock_execute_unmap() and fd_execute_unmap().Cc: Christoph Hellwig
Cc: Martin K. Petersen
Cc: Nicholas Bellinger
Signed-off-by: Asias He
Signed-off-by: Nicholas Bellinger -
Add helper iblock_do_unmap() to remove duplicated code in
iblock_execute_write_same_unmap() and iblock_execute_unmap().Cc: Christoph Hellwig
Cc: Martin K. Petersen
Cc: Nicholas Bellinger
Signed-off-by: Asias He
Signed-off-by: Nicholas Bellinger
28 Feb, 2013
1 commit
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Inclues sbp_exit, fileio_module_exit, iblock_module_exit and
pscsi_module_exit.Note: rd_module_exit() can not be annotated by __exit, becasue it is
called by target_core_init_configfs() which is annotated by __init.Signed-off-by: Asias He
Signed-off-by: Nicholas Bellinger
24 Feb, 2013
1 commit
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Trivial, but WRITE SAME is an SBC command so it seems strange for a
related function (defined in target_core_sbc.c) to be in the spc_
namespace.Signed-off-by: Roland Dreier
Signed-off-by: Nicholas Bellinger
14 Feb, 2013
2 commits
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SBC-3 (revision 35) says:
The PARAMETER LIST LENGTH field specifies the length in bytes of the
UNMAP parameter list that is available to be transferred from the
Data-Out Buffer. If the parameter list length is greater than zero
and less than 0008h (i.e., eight), then the device server shall
terminate the command with CHECK CONDITION status with the sense key
set to ILLEGAL REQUEST and the additional sense code set to
PARAMETER LIST LENGTH ERROR. A PARAMETER LIST LENGTH set to zero
specifies that no data shall be sent.so our sense code for too-short descriptors was wrong, and we were
incorrectly failing commands that didn't transfer any descriptors.While we're at it, also handle the UNMAP check:
If the ANCHOR bit is set to one, and the ANC_SUP bit in the Logical
Block Provisioning VPD page (see 6.6.4) is set to zero, then the
device server shall terminate the command with CHECK CONDITION
status with the sense key set to ILLEGAL REQUEST and the additional
sense code set to INVALID FIELD IN CDB.(chris boot: Fix wrong cut+paste comment in transport_send_check_condition_and_sense)
Signed-off-by: Roland Dreier
Signed-off-by: Nicholas Bellinger -
This patch allows IBLOCK to check block hints in request_queue->flush_flags
when reporting current backend device WriteCacheEnabled status to a remote
SCSI initiator port.This is done via a se_subsystem_api->get_write_cache() call instead of a
backend se_device creation time flag, as we expect REQ_FLUSH bits to possibly
change from an underlying blk_queue_flush() by the SCSI disk driver, or
internal raw struct block_device driver usage.Also go ahead and update iblock_execute_rw() bio I/O path code to use
REQ_FLUSH + REQ_FUA hints when determining WRITE_FUA usage, and make SPC
emulation code use a spc_check_dev_wce() helper to handle both types of
cases for virtual backend subsystem drivers.(asias: Drop unnecessary comparsion operators)
Reported-by: majianpeng
Cc: majianpeng
Cc: Christoph Hellwig
Cc: Jens Axboe
Cc: James Bottomley
Signed-off-by: Nicholas Bellinger
28 Nov, 2012
3 commits
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We already expect TFO->get_blocks() to return sector_t for zero value case
when doing WRITE_SAME to the end of the backend device, so go ahead and return
sector_t from spc_get_write_same_sectors() to handle this case properly.Also, update the single iblock_execute_write_same() caller of this code.
Cc: Christoph Hellwig
Cc: Martin K. Petersen
Signed-off-by: Nicholas Bellinger -
Go ahead and forward declare the handful of helper functions required
for bio submission code in order to avoid the extra function prototypes.Reported-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
v2: Use correct target_core_stat.c 2006 copyright year
v3: Drop extra unnessary legal verbage from header (hch)Cc: Christoph Hellwig
Signed-off-by: Nicholas Bellinger
16 Nov, 2012
1 commit
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This patch adds support for emulation of WRITE_SAME w/ UNMAP=0 within
iblock_execute_write_same() backend code.The emulation uses a bio_add_page() call for each sector, and by default
enforces a limit of max_write_same_len=0xFFFF (65536) sectors following
what scsi_debug reports per default for MAXIMUM WRITE SAME LENGTH.It also sets max_write_same_len to the operational default at setup ->
iblock_configure_device() time.(hch: Move unmap logic into iblock_execute_write_same_unmap + add
check for single sector SGLs in iblock_execute_write_same)
(mkp: Update comment for 0xFFFF magic constant)
(nab: drop left-over max_write_same_len check in iblock_execute_write_same)Cc: Christoph Hellwig
Cc: Martin K. Petersen
Signed-off-by: Nicholas Bellinger
07 Nov, 2012
5 commits
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Pass the sense reason as an explicit return value from the I/O submission
path instead of storing it in struct se_cmd and using negative return
values. This cleans up a lot of the code pathes, and with the sparse
annotations for the new sense_reason_t type allows for much better
error checking.(nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use
sense_reason_t with Roland's MODE SELECT changes)Signed-off-by: Christoph Hellwig
Cc: Roland Dreier
Signed-off-by: Nicholas Bellinger -
Now that the reservations and ALUA code have been cleaned up there is no need
for the get_device_rev method, as we only need the standards revision in the
inquiry data, where we can hardcode it.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
These really are sbc_ops, so name them correctly.
Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Simplify the code a lot by killing the superflous struct se_subsystem_dev.
Instead se_device is allocated early on by the backend driver, which allocates
it as part of its own per-device structure, borrowing the scheme that is for
example used for inode allocation.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger
11 Oct, 2012
1 commit
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Pull block IO update from Jens Axboe:
"Core block IO bits for 3.7. Not a huge round this time, it contains:- First series from Kent cleaning up and generalizing bio allocation
and freeing.- WRITE_SAME support from Martin.
- Mikulas patches to prevent O_DIRECT crashes when someone changes
the block size of a device.- Make bio_split() work on data-less bio's (like trim/discards).
- A few other minor fixups."
Fixed up silent semantic mis-merge as per Mikulas Patocka and Andrew
Morton. It is due to the VM no longer using a prio-tree (see commit
6b2dbba8b6ac: "mm: replace vma prio_tree with an interval tree").So make set_blocksize() use mapping_mapped() instead of open-coding the
internal VM knowledge that has changed.* 'for-3.7/core' of git://git.kernel.dk/linux-block: (26 commits)
block: makes bio_split support bio without data
scatterlist: refactor the sg_nents
scatterlist: add sg_nents
fs: fix include/percpu-rwsem.h export error
percpu-rw-semaphore: fix documentation typos
fs/block_dev.c:1644:5: sparse: symbol 'blkdev_mmap' was not declared
blockdev: turn a rw semaphore into a percpu rw semaphore
Fix a crash when block device is read and block size is changed at the same time
block: fix request_queue->flags initialization
block: lift the initial queue bypass mode on blk_register_queue() instead of blk_init_allocated_queue()
block: ioctl to zero block ranges
block: Make blkdev_issue_zeroout use WRITE SAME
block: Implement support for WRITE SAME
block: Consolidate command flag and queue limit checks for merges
block: Clean up special command handling logic
block/blk-tag.c: Remove useless kfree
block: remove the duplicated setting for congestion_threshold
block: reject invalid queue attribute values
block: Add bio_clone_bioset(), bio_clone_kmalloc()
block: Consolidate bio_alloc_bioset(), bio_kmalloc()
...
18 Sep, 2012
3 commits
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scsi_setup_fs_cmnd does not like to receive requests with no
bios attached to it. Special-case zero-length reads and writes,
by not submitting any bio.Testcase: sg_raw /dev/sdb 28 00 00 00 00 00 00 00 00 00
should not fail
panics with the rest of the series but not this patch
behaves correctly without or with this seriesSigned-off-by: Paolo Bonzini
Signed-off-by: Nicholas Bellinger -
This patch drops se_subsystem_api->[write_cache,fua_write]_emulated flags
set by viritual FILEIO/IBLOCK/RD_MCP backend drivers in favor of explict
TRANSPORT_PLUGIN_PHBA_PDEV checks to know when to fail if userspace is
attempting to set virtual emulation bits for an pSCSI (passthrough)
backend device.Reported-by: Christoph Hellwig
Cc: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Following commit dbc6e0222 from Al Viro for fileio, go ahead and make
Opt_udev_path within iblock_set_configfs_dev_params use match_strlcpy
instead of the match_strdup -> snprintf -> kfree equivalent.Reported-by: Al Viro
Cc: Al Viro
Signed-off-by: Nicholas Bellinger
09 Sep, 2012
1 commit
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With the old code, when you allocate a bio from a bio pool you have to
implement your own destructor that knows how to find the bio pool the
bio was originally allocated from.This adds a new field to struct bio (bi_pool) and changes
bio_alloc_bioset() to use it. This makes various bio destructors
unnecessary, so they're then deleted.v6: Explain the temporary if statement in bio_put
Signed-off-by: Kent Overstreet
CC: Jens Axboe
CC: NeilBrown
CC: Alasdair Kergon
CC: Nicholas Bellinger
CC: Lars Ellenberg
Acked-by: Tejun Heo
Acked-by: Nicholas Bellinger
Signed-off-by: Jens Axboe
08 Sep, 2012
1 commit
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Several places were not checking that the parameter list length
was large enough, and thus accessing invalid memory. Zero-length
parameter lists are just a special case of this.Signed-off-by: Paolo Bonzini
Signed-off-by: Nicholas Bellinger
17 Jul, 2012
7 commits
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Fail UNMAP commands that have more than our reported limit on unmap
descriptors.Signed-off-by: Roland Dreier
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger -
It's possible for an initiator to send us an UNMAP command with a
descriptor that is less than 8 bytes; in that case it's really bad for
us to set an unsigned int to that value, subtract 8 from it, and then
use that as a limit for our loop (since the value will wrap around to
a huge positive value).Fix this by making size be signed and only looping if size >= 16 (ie
if we have at least a full descriptor available).Also remove offset as an obfuscated name for the constant 8.
Signed-off-by: Roland Dreier
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger -
The UNMAP DATA LENGTH and UNMAP BLOCK DESCRIPTOR DATA LENGTH fields
are in the unmap descriptor (the payload transferred to our data out
buffer), not in the CDB itself. Read them from the correct place in
target_emulated_unmap.Signed-off-by: Roland Dreier
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger -
When processing an UNMAP command, we need to make sure that the number
of blocks we're asked to UNMAP does not exceed our reported maximum
number of blocks per UNMAP, and that the range of blocks we're
unmapping doesn't go past the end of the device.Signed-off-by: Roland Dreier
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger -
Having all the unmap payload parsing in the backed is a bit ugly, but until
more drivers support it and we can find a good interface for all of them
that seems the way to go.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Add spc_ops->execute_write_same() caller for ->execute_cmd() setup,
and update IBLOCK backends to use it.(nab: add export of spc_get_write_same_sectors symbol)
(roland: Carry forward: Fix range calculation in WRITE SAME emulation
when num blocks == 0)Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Add spc_ops->execute_sync_cache() caller for ->execute_cmd() setup,
and update IBLOCK + FILEIO backends to use it.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger