Commit Graph

220 Commits

Author SHA1 Message Date
Bart Van Assche
04060db411 scsi: RDMA/isert: Fix a recently introduced regression related to logout
iscsit_close_connection() calls isert_wait_conn(). Due to commit
e9d3009cb9 both functions call target_wait_for_sess_cmds() although that
last function should be called only once. Fix this by removing the
target_wait_for_sess_cmds() call from isert_wait_conn() and by only calling
isert_wait_conn() after target_wait_for_sess_cmds().

Fixes: e9d3009cb9 ("scsi: target: iscsi: Wait for all commands to finish before freeing a session").
Link: https://lore.kernel.org/r/20200116044737.19507-1-bvanassche@acm.org
Reported-by: Rahul Kundu <rahul.kundu@chelsio.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-21 00:24:46 -05:00
Jason Gunthorpe
371bb62158 Linux 5.2-rc6
-----BEGIN PGP SIGNATURE-----
 
 iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAl0Os1seHHRvcnZhbGRz
 QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGtx4H/j6i482XzcGFKTBm
 A7mBoQpy+kLtoUov4EtBAR62OuwI8rsahW9di37QKndPoQrczWaKBmr3De6LCdPe
 v3pl3O6wBbvH5ru+qBPFX9PdNbDvimEChh7LHxmMxNQq3M+AjZAZVJyfpoiFnx35
 Fbge+LZaH/k8HMwZmkMr5t9Mpkip715qKg2o9Bua6dkH0AqlcpLlC8d9a+HIVw/z
 aAsyGSU8jRwhoAOJsE9bJf0acQ/pZSqmFp0rDKqeFTSDMsbDRKLGq/dgv4nW0RiW
 s7xqsjb/rdcvirRj3rv9+lcTVkOtEqwk0PVdL9WOf7g4iYrb3SOIZh8ZyViaDSeH
 VTS5zps=
 =huBY
 -----END PGP SIGNATURE-----

Merge tag 'v5.2-rc6' into rdma.git for-next

For dependencies in next patches.

Resolve conflicts:
- Use uverbs_get_cleared_udata() with new cq allocation flow
- Continue to delete nes despite SPDX conflict
- Resolve list appends in mlx5_command_str()
- Use u16 for vport_rule stuff
- Resolve list appends in struct ib_client

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-28 21:18:23 -03:00
Israel Rukshin
e9a53e73a2 RDMA/rw: Use IB_WR_REG_MR_INTEGRITY for PI handover
Replace the old signature handover API with the new one. The new API
simplifes PI handover code complexity for ULPs and improve performance.
For RW API it will reduce the maximum number of work requests per task
and the need of dealing with multiple MRs (and their registrations and
invalidations) per task. All the mappings and registration of the data
and the protection buffers is done by the LLD using a single WR and a
special MR type (IB_MR_TYPE_INTEGRITY) for the PI handover operation.

The setup of the tested benchmark (using iSER ULP):
 - 2 servers with 24 cores (1 initiator and 1 target)
 - ConnectX-4/ConnectX-5 adapters
 - 24 target sessions with 1 LUN each
 - ramdisk backstore
 - PI active

Performance results running fio (24 jobs, 128 iodepth) using
write_generate=1 and read_verify=1 (w/w.o patch):

bs      IOPS(read)        IOPS(write)
----    ----------        ----------
512   1243.3K/1182.3K    1725.1K/1680.2K
4k    571233/528835      743293/748259
32k   72388/71086        71789/93573

Using write_generate=0 and read_verify=0 (w/w.o patch):
bs      IOPS(read)        IOPS(write)
----    ----------        ----------
512   1572.1K/1427.2K    1823.5K/1724.3K
4k    921992/916194      753772/768267
32k   75052/73960        73180/95484

There is a performance degradation when writing big block sizes.
Degradation is caused by the complexity of combining multiple
indirections and perform RDMA READ operation from it. This will be
fixed in the following patches by reducing the indirections if
possible.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-24 11:49:28 -03:00
Israel Rukshin
c0a6cbb9cb RDMA/core: Rename signature qp create flag and signature device capability
Rename IB_QP_CREATE_SIGNATURE_EN to IB_QP_CREATE_INTEGRITY_EN
and IB_DEVICE_SIGNATURE_HANDOVER to IB_DEVICE_INTEGRITY_HANDOVER.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-24 11:49:27 -03:00
Thomas Gleixner
c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00
Israel Rukshin
dae6345aa7 IB/isert: Remove unused sig_attrs argument
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-05-21 15:01:06 -03:00
Thomas Gleixner
ec8f24b7fa treewide: Add SPDX license identifier - Makefile/Kconfig
Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 10:50:46 +02:00
Linus Torvalds
92fff53b71 SCSI misc on 20190306
This is mostly update of the usual drivers: arcmsr, qla2xxx, lpfc,
 hisi_sas, target/iscsi and target/core.  Additionally Christoph
 refactored gdth as part of the dma changes.  The major mid-layer
 change this time is the removal of bidi commands and with them the
 whole of the osd/exofs driver and filesystem.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
 -----BEGIN PGP SIGNATURE-----
 
 iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCXIC54SYcamFtZXMuYm90
 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishT1GAPwJEV23
 ExPiPsnuVgKj49nLTagZ3rILRQcYNbL+MNYqxQEA0cT8FHzSDBfWY5OKPNE+RQ8z
 f69LpXGmMpuagKGvvd4=
 =Fhy1
 -----END PGP SIGNATURE-----

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This is mostly update of the usual drivers: arcmsr, qla2xxx, lpfc,
  hisi_sas, target/iscsi and target/core.

  Additionally Christoph refactored gdth as part of the dma changes. The
  major mid-layer change this time is the removal of bidi commands and
  with them the whole of the osd/exofs driver and filesystem. This is a
  major simplification for block and mq in particular"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (240 commits)
  scsi: cxgb4i: validate tcp sequence number only if chip version <= T5
  scsi: cxgb4i: get pf number from lldi->pf
  scsi: core: replace GFP_ATOMIC with GFP_KERNEL in scsi_scan.c
  scsi: mpt3sas: Add missing breaks in switch statements
  scsi: aacraid: Fix missing break in switch statement
  scsi: kill command serial number
  scsi: csiostor: drop serial_number usage
  scsi: mvumi: use request tag instead of serial_number
  scsi: dpt_i2o: remove serial number usage
  scsi: st: osst: Remove negative constant left-shifts
  scsi: ufs-bsg: Allow reading descriptors
  scsi: ufs: Allow reading descriptor via raw upiu
  scsi: ufs-bsg: Change the calling convention for write descriptor
  scsi: ufs: Remove unused device quirks
  Revert "scsi: ufs: disable vccq if it's not needed by UFS device"
  scsi: megaraid_sas: Remove a bunch of set but not used variables
  scsi: clean obsolete return values of eh_timed_out
  scsi: sd: Optimal I/O size should be a multiple of physical block size
  scsi: MAINTAINERS: SCSI initiator and target tweaks
  scsi: fcoe: make use of fip_mode enum complete
  ...
2019-03-09 16:53:47 -08:00
Bart Van Assche
0300b1147e scsi: target/iscsi: Fix spelling of "unsolicited"
Change "unsoliticed" into "unsolicited".

Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-02-04 21:33:59 -05:00
Masahiro Yamada
ed4cdf4a21 infiniband: remove unneeded header search paths
The included headers are located in include/target/. I was able to
build these drivers without the extra header search paths.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-25 15:28:50 -07:00
Jason Gunthorpe
6c8541118b RDMA/ulp: Use dev_name instead of ibdev->name
These return the same thing but dev_name is a more conventional use of the
kernel API.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
2018-09-26 13:51:48 -06:00
Bart Van Assche
e01a76743a IB/isert: Simplify ib_post_(send|recv|srq_recv)() calls
Instead of declaring and passing a dummy 'bad_wr' pointer, pass NULL
as third argument to ib_post_(send|recv|srq_recv)().

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-24 16:06:36 -06:00
Steve Wise
33023fb85a IB/core: add max_send_sge and max_recv_sge attributes
This patch replaces the ib_device_attr.max_sge with max_send_sge and
max_recv_sge. It allows ulps to take advantage of devices that have very
different send and recv sge depths.  For example cxgb4 has a max_recv_sge
of 4, yet a max_send_sge of 16.  Splitting out these attributes allows
much more efficient use of the SQ for cxgb4 with ulps that use the RDMA_RW
API. Consider a large RDMA WRITE that has 16 scattergather entries.
With max_sge of 4, the ulp would send 4 WRITE WRs, but with max_sge of
16, it can be done with 1 WRITE WR.

Acked-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-06-18 13:17:28 -06:00
Kees Cook
6396bb2215 treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00
Max Gurtovoy
26232872b1 IB/isert: use T10-PI check mask definitions from core layer
No reason to use hard-coded protection information checks in ib_isert
driver. Use check masks from RDMA core driver.
Also, while we here, reduce the number of instructions made for setting
the check mask (no need to do bitwise or with 0 since we zero the mask
in the beginning of the function).

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-06-04 09:19:24 -06:00
Max Gurtovoy
0e12af84cd IB/isert: fix T10-pi check mask setting
A copy/paste bug (probably) caused setting of an app_tag check mask
in case where a ref_tag check was needed.

Fixes: 38a2d0d429 ("IB/isert: convert to the generic RDMA READ/WRITE API")
Fixes: 9e961ae73c ("IB/isert: Support T10-PI protected transactions")
Cc: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-06-04 09:19:24 -06:00
Alex Estrin
763b69654b IB/isert: Fix for lib/dma_debug check_sync warning
The following error message occurs on a target host in a debug build
during session login:

[ 3524.411874] WARNING: CPU: 5 PID: 12063 at lib/dma-debug.c:1207 check_sync+0x4ec/0x5b0
[ 3524.421057] infiniband hfi1_0: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x0000000000000000] [size=76 bytes]
......snip .....

[ 3524.535846] CPU: 5 PID: 12063 Comm: iscsi_np Kdump: loaded Not tainted 3.10.0-862.el7.x86_64.debug #1
[ 3524.546764] Hardware name: Dell Inc. PowerEdge R430/03XKDV, BIOS 1.2.6 06/08/2015
[ 3524.555740] Call Trace:
[ 3524.559102]  [<ffffffffa5fe915b>] dump_stack+0x19/0x1b
[ 3524.565477]  [<ffffffffa58a2f58>] __warn+0xd8/0x100
[ 3524.571557]  [<ffffffffa58a2fdf>] warn_slowpath_fmt+0x5f/0x80
[ 3524.578610]  [<ffffffffa5bf5b8c>] check_sync+0x4ec/0x5b0
[ 3524.585177]  [<ffffffffa58efc3f>] ? set_cpus_allowed_ptr+0x5f/0x1c0
[ 3524.592812]  [<ffffffffa5bf5cd0>] debug_dma_sync_single_for_cpu+0x80/0x90
[ 3524.601029]  [<ffffffffa586add3>] ? x2apic_send_IPI_mask+0x13/0x20
[ 3524.608574]  [<ffffffffa585ee1b>] ? native_smp_send_reschedule+0x5b/0x80
[ 3524.616699]  [<ffffffffa58e9b76>] ? resched_curr+0xf6/0x140
[ 3524.623567]  [<ffffffffc0879af0>] isert_create_send_desc.isra.26+0xe0/0x110 [ib_isert]
[ 3524.633060]  [<ffffffffc087af95>] isert_put_login_tx+0x55/0x8b0 [ib_isert]
[ 3524.641383]  [<ffffffffa58ef114>] ? try_to_wake_up+0x1a4/0x430
[ 3524.648561]  [<ffffffffc098cfed>] iscsi_target_do_tx_login_io+0xdd/0x230 [iscsi_target_mod]
[ 3524.658557]  [<ffffffffc098d827>] iscsi_target_do_login+0x1a7/0x600 [iscsi_target_mod]
[ 3524.668084]  [<ffffffffa59f9bc9>] ? kstrdup+0x49/0x60
[ 3524.674420]  [<ffffffffc098e976>] iscsi_target_start_negotiation+0x56/0xc0 [iscsi_target_mod]
[ 3524.684656]  [<ffffffffc098c2ee>] __iscsi_target_login_thread+0x90e/0x1070 [iscsi_target_mod]
[ 3524.694901]  [<ffffffffc098ca50>] ? __iscsi_target_login_thread+0x1070/0x1070 [iscsi_target_mod]
[ 3524.705446]  [<ffffffffc098ca50>] ? __iscsi_target_login_thread+0x1070/0x1070 [iscsi_target_mod]
[ 3524.715976]  [<ffffffffc098ca78>] iscsi_target_login_thread+0x28/0x60 [iscsi_target_mod]
[ 3524.725739]  [<ffffffffa58d60ff>] kthread+0xef/0x100
[ 3524.732007]  [<ffffffffa58d6010>] ? insert_kthread_work+0x80/0x80
[ 3524.739540]  [<ffffffffa5fff1b7>] ret_from_fork_nospec_begin+0x21/0x21
[ 3524.747558]  [<ffffffffa58d6010>] ? insert_kthread_work+0x80/0x80
[ 3524.755088] ---[ end trace 23f8bf9238bd1ed8 ]---
[ 3595.510822] iSCSI/iqn.1994-05.com.redhat:537fa56299: Unsupported SCSI Opcode 0xa3, sending CHECK_CONDITION.

The code calls dma_sync on login_tx_desc->dma_addr prior to initializing it
with dma-mapped address.
login_tx_desc is a part of iser_conn structure and is used only once
during login negotiation, so the issue is fixed by eliminating
dma_sync call for this buffer using a special case routine.

Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Don Dutile <ddutile@redhat.com>
Signed-off-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-05-24 09:39:25 -06:00
Jason Gunthorpe
e7996a9a77 Linux 4.15
-----BEGIN PGP SIGNATURE-----
 
 iQEcBAABAgAGBQJabj6pAAoJEHm+PkMAQRiGs8cIAJQFkCWnbz86e3vG4DuWhyA8
 CMGHCQdUOxxFGa/ixhIiuetbC0x+JVHAjV2FwVYbAQfaZB3pfw2iR1ncQxpAP1AI
 oLU9vBEqTmwKMPc9CM5rRfnLFWpGcGwUNzgPdxD5yYqGDtcM8K840mF6NdkYe5AN
 xU8rv1wlcFPF4A5pvHCH0pvVmK4VxlVFk/2H67TFdxBs4PyJOnSBnf+bcGWgsKO6
 hC8XIVtcKCH2GfFxt5d0Vgc5QXJEpX1zn2mtCa1MwYRjN2plgYfD84ha0xE7J0B0
 oqV/wnjKXDsmrgVpncr3txd4+zKJFNkdNRE4eLAIupHo2XHTG4HvDJ5dBY2NhGU=
 =sOml
 -----END PGP SIGNATURE-----

Merge tag v4.15 of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

To resolve conflicts in:
 drivers/infiniband/hw/mlx5/main.c
 drivers/infiniband/hw/mlx5/qp.c

From patches merged into the -rc cycle. The conflict resolution matches
what linux-next has been carrying.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-01-30 09:30:00 -07:00
Sagi Grimberg
cd52cb26e7 iser-target: Fix possible use-after-free in connection establishment error
In case we fail to establish the connection we must drain our pre-posted
login recieve work request before continuing safely with connection
teardown.

Fixes: a060b5629a ("IB/core: generic RDMA READ/WRITE API")
Cc: <stable@vger.kernel.org> # 4.7+
Reported-by: Amrani, Ram <Ram.Amrani@cavium.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2018-01-10 16:46:03 -05:00
Bharat Potnuri
66f53e6f54 iser-target: avoid reinitializing rdma contexts for isert commands
isert commands that failed during isert_rdma_rw_ctx_post() are queued to
Queue-Full(QF) queue and are scheduled to be reposted during queue-full
queue processing. During this reposting, the rdma contexts are initialised
again in isert_rdma_rw_ctx_post(), which is leaking significant memory.

unreferenced object 0xffff8830201d9640 (size 64):
  comm "kworker/0:2", pid 195, jiffies 4295374851 (age 4528.436s)
  hex dump (first 32 bytes):
    00 60 8b cb 2e 00 00 00 00 10 00 00 00 00 00 00  .`..............
    00 90 e3 cb 2e 00 00 00 00 10 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8170711e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff811f8ba5>] __kmalloc+0x125/0x2b0
    [<ffffffffa046b24f>] rdma_rw_ctx_init+0x15f/0x6f0 [ib_core]
    [<ffffffffa07ab644>] isert_rdma_rw_ctx_post+0xc4/0x3c0 [ib_isert]
    [<ffffffffa07ad972>] isert_put_datain+0x112/0x1c0 [ib_isert]
    [<ffffffffa07dddce>] lio_queue_data_in+0x2e/0x30 [iscsi_target_mod]
    [<ffffffffa076c322>] target_qf_do_work+0x2b2/0x4b0 [target_core_mod]
    [<ffffffff81080c3b>] process_one_work+0x1db/0x5d0
    [<ffffffff8108107d>] worker_thread+0x4d/0x3e0
    [<ffffffff81088667>] kthread+0x117/0x150
    [<ffffffff81713fa7>] ret_from_fork+0x27/0x40
    [<ffffffffffffffff>] 0xffffffffffffffff

Here is patch to use the older rdma contexts while reposting
the isert commands intead of reinitialising them.

Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2017-12-18 16:12:18 -07:00
Linus Torvalds
ad0835a930 Updates for 4.15 kernel merge window
- Add iWARP support to qedr driver
 - Lots of misc fixes across subsystem
 - Multiple update series to hns roce driver
 - Multiple update series to hfi1 driver
 - Updates to vnic driver
 - Add kref to wait struct in cxgb4 driver
 - Updates to i40iw driver
 - Mellanox shared pull request
 - timer_setup changes
 - massive cleanup series from Bart Van Assche
 - Two series of SRP/SRPT changes from Bart Van Assche
 - Core updates from Mellanox
 - i40iw updates
 - IPoIB updates
 - mlx5 updates
 - mlx4 updates
 - hns updates
 - bnxt_re fixes
 - PCI write padding support
 - Sparse/Smatch/warning cleanups/fixes
 - CQ moderation support
 - SRQ support in vmw_pvrdma
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJaDF9JAAoJELgmozMOVy/dDXUP/i92g+G4OJ+4hHMh4KCjQMHT
 eMr/w9l1C033HrtsU1afPhqHOsKSxwCuJSiTgN4uXIm67/2kPK5Vlx+ir7mbOLwB
 3ukVK6Q/aFdigWCUhIaJSlDpjbd2sEj7JwKtM3rucvMWJlBJ4mAbcVQVfU96CCsv
 V9mO7dpR3QtYWDId9DukfnAfPUPFa3SMZnD7tdl6mKNRg/MjWGYLAL4nJoBfex5f
 b4o+MTrbuFWXYsfDru1m9BpHgyul20ldfcnbe8C/sVOQmOgkX7ngD5Sdi1FLeRJP
 GF/DnAqInC9N7cAxZHx4kH9x6mLMmEdfnwQ9VTVqGUHBsj3H4hQTVIAFfHUhWUbG
 TP5ZHgZG2CewZ0rf092cWlDZwp6n0BalnbQJr+QN4MzPmYbofs3AccSKUwrle+e+
 E6yYf4XxJdt7wRr4F1QKygtUEXSnNkNYUDQ4ZFbpJS/D4Sq80R1ZV/WZ7PJxm1D/
 EIKoi7NU9cbPMIlbCzn8kzgfjS7Pe4p0WW/Xxc/IYmACzpwNPkZuFGSND79ksIpF
 jhHqwZsOWFuXISjvcR4loc8wW6a5w5vjOiX0lLVz0NSdXSzVqav/2at7ZLDx/PT+
 Lh9YVL51akA3hiD+3X6iOhfOUu6kskjT9HijE5T8rJnf0V+C6AtIRpwrQ7ONmjJm
 3JMrjjLxtCIvpUyzCvDW
 =A1oL
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma updates from Doug Ledford:
 "This is a fairly plain pull request. Lots of driver updates across the
  stack, a huge number of static analysis cleanups including a close to
  50 patch series from Bart Van Assche, and a number of new features
  inside the stack such as general CQ moderation support.

  Nothing really stands out, but there might be a few conflicts as you
  take things in. In particular, the cleanups touched some of the same
  lines as the new timer_setup changes.

  Everything in this pull request has been through 0day and at least two
  days of linux-next (since Stephen doesn't necessarily flag new
  errors/warnings until day2). A few more items (about 30 patches) from
  Intel and Mellanox showed up on the list on Tuesday. I've excluded
  those from this pull request, and I'm sure some of them qualify as
  fixes suitable to send any time, but I still have to review them
  fully. If they contain mostly fixes and little or no new development,
  then I will probably send them through by the end of the week just to
  get them out of the way.

  There was a break in my acceptance of patches which coincides with the
  computer problems I had, and then when I got things mostly back under
  control I had a backlog of patches to process, which I did mostly last
  Friday and Monday. So there is a larger number of patches processed in
  that timeframe than I was striving for.

  Summary:
   - Add iWARP support to qedr driver
   - Lots of misc fixes across subsystem
   - Multiple update series to hns roce driver
   - Multiple update series to hfi1 driver
   - Updates to vnic driver
   - Add kref to wait struct in cxgb4 driver
   - Updates to i40iw driver
   - Mellanox shared pull request
   - timer_setup changes
   - massive cleanup series from Bart Van Assche
   - Two series of SRP/SRPT changes from Bart Van Assche
   - Core updates from Mellanox
   - i40iw updates
   - IPoIB updates
   - mlx5 updates
   - mlx4 updates
   - hns updates
   - bnxt_re fixes
   - PCI write padding support
   - Sparse/Smatch/warning cleanups/fixes
   - CQ moderation support
   - SRQ support in vmw_pvrdma"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (296 commits)
  RDMA/core: Rename kernel modify_cq to better describe its usage
  IB/mlx5: Add CQ moderation capability to query_device
  IB/mlx4: Add CQ moderation capability to query_device
  IB/uverbs: Add CQ moderation capability to query_device
  IB/mlx5: Exposing modify CQ callback to uverbs layer
  IB/mlx4: Exposing modify CQ callback to uverbs layer
  IB/uverbs: Allow CQ moderation with modify CQ
  iw_cxgb4: atomically flush the qp
  iw_cxgb4: only call the cq comp_handler when the cq is armed
  iw_cxgb4: Fix possible circular dependency locking warning
  RDMA/bnxt_re: report vlan_id and sl in qp1 recv completion
  IB/core: Only maintain real QPs in the security lists
  IB/ocrdma_hw: remove unnecessary code in ocrdma_mbx_dealloc_lkey
  RDMA/core: Make function rdma_copy_addr return void
  RDMA/vmw_pvrdma: Add shared receive queue support
  RDMA/core: avoid uninitialized variable warning in create_udata
  RDMA/bnxt_re: synchronize poll_cq and req_notify_cq verbs
  RDMA/bnxt_re: Flush CQ notification Work Queue before destroying QP
  RDMA/bnxt_re: Set QP state in case of response completion errors
  RDMA/bnxt_re: Add memory barriers when processing CQ/EQ entries
  ...
2017-11-15 14:54:53 -08:00
Greg Kroah-Hartman
b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00
Bart Van Assche
d2271bd083 RDMA/isert: Suppress gcc 7 fall-through complaints
Avoid that gcc 7 reports the following warning when building with W=1:

warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-10-14 20:47:05 -04:00
Leon Romanovsky
e1267b0124 RDMA: Remove useless MODULE_VERSION
All modules in drivers/infiniband defined and used MODULE_VERSION, which
was pointless because the kernel version describes their state more accurate
then those arbitrary numbers.

Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Sagi Grimbrg <sagi@grimberg.me>
Reviewed-by: Sagi Grimberg <sagi@grimbeg.me>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Ram Amrani <Ram.Amrani@cavium.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-07-24 08:45:11 -04:00
Nicholas Bellinger
fce50a2fa4 iser-target: Avoid isert_conn->cm_id dereference in isert_login_recv_done
This patch fixes a NULL pointer dereference in isert_login_recv_done()
of isert_conn->cm_id due to isert_cma_handler() -> isert_connect_error()
resetting isert_conn->cm_id = NULL during a failed login attempt.

As per Sagi, we will always see the completion of all recv wrs posted
on the qp (given that we assigned a ->done handler), this is a FLUSH
error completion, we just don't get to verify that because we deref
NULL before.

The issue here, was the assumption that dereferencing the connection
cm_id is always safe, which is not true since:

    commit 4a579da258
    Author: Sagi Grimberg <sagig@mellanox.com>
    Date:   Sun Mar 29 15:52:04 2015 +0300

         iser-target: Fix possible deadlock in RDMA_CM connection error

As I see it, we have a direct reference to the isert_device from
isert_conn which is the one-liner fix that we actually need like
we do in isert_rdma_read_done() and isert_rdma_write_done().

Reported-by: Andrea Righi <righi.andrea@gmail.com>
Tested-by: Andrea Righi <righi.andrea@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-07-06 23:11:35 -07:00
Sagi Grimberg
7a56dc8888 iser-target: avoid posting a recv buffer twice
We pre-allocate our send-queues and might overflow them
in case we have multi work-request operations which tend
to occur for large RDMA transfers over devices with limited
allowed sg elements. When we get to a queue-full condition
we might retry again later, so track our receive buffers
so we don't repost them for a retry case.

Reported-by: Potnuri Bharat Teja <bharat@chelsio.com>
Tested-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reviewed-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-03-30 20:35:50 -07:00
Nicholas Bellinger
555a65f66c iser-target: Fix queue-full response handling
This patch addresses two queue-full handling bugs in iser-target.

The first is propagating isert_rdma_rw_ctx_post() return back
to target-core via isert_put_datain() + isert_get_dataout()
callbacks, in order to trigger queue-full logic in target-core.
Note target-core expects -EAGAIN or -ENOMEM error to signal
RDMA WRITE/READ data-transfer callbacks should be retried,
after queue-full logic been invoked.

Other types of errors propagated up from RDMA RW API will result
in target-core generating internal CHECK_CONDITION status,
avoiding subsequent isert_put_datain() and isert_get_dataout()
iscsit_transport callback retry attempts.

The second is to use transport_generic_request_failure()
during T10-PI hw-offload errors in isert_rdma_write_done()
and isert_rdma_read_done(), so CHECK_CONDITION queue-full
is handled internally by target-core.

Also add isert_put_response() T10-PI failure case fixme in
isert_rdma_write_done(), which is currently not internally
retried or released until session reinstatement.

Reported-by: Potnuri Bharat Teja <bharat@chelsio.com>
Reviewed-by: Potnuri Bharat Teja <bharat@chelsio.com>
Tested-by: Potnuri Bharat Teja <bharat@chelsio.com>
Cc: Potnuri Bharat Teja <bharat@chelsio.com>
Reported-by: Steve Wise <swise@opengridcomputing.com>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2017-03-30 20:35:07 -07:00
Colin Ian King
506f71d181 IB/isert: fix spelling mistake: "teminating" -> "terminating"
Trivial fix to spelling mistake in isert_warn message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2017-01-24 16:20:37 -05:00
Doug Ledford
9032ad78bb Merge branches 'misc', 'qedr', 'reject-helpers', 'rxe' and 'srp' into merge-test 2016-12-14 14:44:47 -05:00
Alexey Khoroshilov
def4a6ffc9 IB/isert: do not ignore errors in dma_map_single()
There are several places, where errors in dma_map_single() are
ignored. The patch fixes them.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14 12:51:31 -05:00
Steve Wise
1e38a366ee ib_isert: log the connection reject message
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-14 11:38:28 -05:00
Leon Romanovsky
93b80f2904 IB/isert: Remove and fix debug prints after allocation failure
The prints after [k|v][m|z|c]alloc() functions are not needed,
because in case of failure, allocator will print their internal
error prints anyway.

Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-03 13:12:52 -05:00
Linus Torvalds
b9044ac829 Merge of primary rdma-core code for 4.9
- Updates to mlx5
 - Updates to mlx4 (two conflicts, both minor and easily resolved)
 - Updates to iw_cxgb4 (one conflict, not so obvious to resolve, proper
   resolution is to keep the code in cxgb4_main.c as it is in Linus'
   tree as attach_uld was refactored and moved into cxgb4_uld.c)
 - Improvements to uAPI (moved vendor specific API elements to uAPI area)
 - Add hns-roce driver and hns and hns-roce ACPI reset support
 - Conversion of all rdma code away from deprecated
   create_singlethread_workqueue
 - Security improvement: remove unsafe ib_get_dma_mr (breaks lustre in
   staging)
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJX+AwSAAoJELgmozMOVy/d0WkQAKxPzVccMWwHv28iZI4ey13u
 JwE+VoCNpCAZAVuEgzK5zzFdNHPvAk2jU93H4apA7dfXJBXPatVuj9Lnk+ieEEnW
 tbFwJjBpbQ3Zol3+SPfAHnsVMbtax+xmd6WDKExPXXEDl1L6rutwL3KKfmgWEitg
 ysX7XOJCiSdyM0hcg4T6UPB9a3jGPff9NLu0oGamV+yoUk5Y0WGoVFxHZ4MKcw8t
 OkFBYIxGz4SGwq2tulStuH03HteURX594KngtrA8dyq6l1R2GlGRv+bkJAUEIWUv
 aA0ow3VWusOM6fT+jLXPCv8iUwIXM8tR/U6F7X+cmORUUtWvCl+uCUVid113j/aN
 BK+Af2nJnfoJ5cDBPsD+bC76l5gQycNZO/Qh8op2kmgJtD+6OpGM3cBXsHx53+kk
 0wloJ2lKCGShWxNj+ig8n8rR/rhhs/x3vV3ouCVWNMbOUgOSN3eYHxmK3wGFW4nd
 Qx+WYCjj9Yi/J6nmUDcfEQ4NWPR22Q2+0ENAabfhLhV6mDloAO5ILHd4GDqC3IA9
 UtxlVjf4ZonaiLnTQQzCnDMGVVk6tT8FJ9D42s0ScwjbdYwjyCW9/rs/g2EhcprR
 Cc+AmjqLviCWGtzBSFO0SijqQon8lcQOwdLw61CdFFvPa/mlLdf1rbx9ArIyNVKn
 JSrbr3CGyoqyYj6qaEO5
 =LC+S
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull main rdma updates from Doug Ledford:
 "This is the main pull request for the rdma stack this release.  The
  code has been through 0day and I had it tagged for linux-next testing
  for a couple days.

  Summary:

   - updates to mlx5

   - updates to mlx4 (two conflicts, both minor and easily resolved)

   - updates to iw_cxgb4 (one conflict, not so obvious to resolve,
     proper resolution is to keep the code in cxgb4_main.c as it is in
     Linus' tree as attach_uld was refactored and moved into
     cxgb4_uld.c)

   - improvements to uAPI (moved vendor specific API elements to uAPI
     area)

   - add hns-roce driver and hns and hns-roce ACPI reset support

   - conversion of all rdma code away from deprecated
     create_singlethread_workqueue

   - security improvement: remove unsafe ib_get_dma_mr (breaks lustre in
     staging)"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (75 commits)
  staging/lustre: Disable InfiniBand support
  iw_cxgb4: add fast-path for small REG_MR operations
  cxgb4: advertise support for FR_NSMR_TPTE_WR
  IB/core: correctly handle rdma_rw_init_mrs() failure
  IB/srp: Fix infinite loop when FMR sg[0].offset != 0
  IB/srp: Remove an unused argument
  IB/core: Improve ib_map_mr_sg() documentation
  IB/mlx4: Fix possible vl/sl field mismatch in LRH header in QP1 packets
  IB/mthca: Move user vendor structures
  IB/nes: Move user vendor structures
  IB/ocrdma: Move user vendor structures
  IB/mlx4: Move user vendor structures
  IB/cxgb4: Move user vendor structures
  IB/cxgb3: Move user vendor structures
  IB/mlx5: Move and decouple user vendor structures
  IB/{core,hw}: Add constant for node_desc
  ipoib: Make ipoib_warn ratelimited
  IB/mlx4/alias_GUID: Remove deprecated create_singlethread_workqueue
  IB/ipoib_verbs: Remove deprecated create_singlethread_workqueue
  IB/ipoib: Remove deprecated create_singlethread_workqueue
  ...
2016-10-09 17:04:33 -07:00
Christoph Hellwig
ed082d36a7 IB/core: add support to create a unsafe global rkey to ib_create_pd
Instead of exposing ib_get_dma_mr to ULPs and letting them use it more or
less unchecked, this moves the capability of creating a global rkey into
the RDMA core, where it can be easily audited.  It also prints a warning
everytime this feature is used as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-09-23 13:47:44 -04:00
Raju Rangoju
63b268d232 IB/isert: Properly release resources on DEVICE_REMOVAL
When the low level driver exercises the hot unplug they would call
rdma_cm cma_remove_one which would fire DEVICE_REMOVAL event to all cma
consumers. Now, if consumer doesn't make sure they destroy all IB
objects created on that IB device instance prior to finalizing all
processing of DEVICE_REMOVAL callback, rdma_cm will let the lld to
de-register with IB core and destroy the IB device instance. And if the
consumer calls (say) ib_dereg_mr(), it will crash since that dev object
is NULL.

In the current implementation, iser-target just initiates the cleanup
and returns from DEVICE_REMOVAL callback. This deferred work creates a
race between iser-target cleaning IB objects(say MR) and lld destroying
IB device instance.

This patch includes the following fixes
  -> make sure that consumer frees all IB objects associated with device
     instance
  -> return non-zero from the callback to destroy the rdma_cm id

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-09-02 13:46:32 -04:00
Wei Yongjun
1d5840c971 IB/isert: fix error return code in isert_alloc_login_buf()
Fix to return error code -ENOMEM from the alloc error handling
case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-08-22 14:26:55 -04:00
Bart Van Assche
e6d66e3eb6 IB/isert: Remove an unused member variable
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Cc: Parav Pandit <pandit.parav@gmail.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-08-02 12:02:41 -04:00
Linus Torvalds
9ba55cf7cf Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
 "Here are the outstanding target pending updates for v4.7-rc1.

  The highlights this round include:

   - Allow external PR/ALUA metadata path be defined at runtime via top
     level configfs attribute (Lee)
   - Fix target session shutdown bug for ib_srpt multi-channel (hch)
   - Make TFO close_session() and shutdown_session() optional (hch)
   - Drop se_sess->sess_kref + convert tcm_qla2xxx to internal kref
     (hch)
   - Add tcm_qla2xxx endpoint attribute for basic FC jammer (Laurence)
   - Refactor iscsi-target RX/TX PDU encode/decode into common code
     (Varun)
   - Extend iscsit_transport with xmit_pdu, release_cmd, get_rx_pdu,
     validate_parameters, and get_r2t_ttt for generic ISO offload
     (Varun)
   - Initial merge of cxgb iscsi-segment offload target driver (Varun)

  The bulk of the changes are Chelsio's new driver, along with a number
  of iscsi-target common code improvements made by Varun + Co along the
  way"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (29 commits)
  iscsi-target: Fix early sk_data_ready LOGIN_FLAGS_READY race
  cxgbit: Use type ISCSI_CXGBIT + cxgbit tpg_np attribute
  iscsi-target: Convert transport drivers to signal rdma_shutdown
  iscsi-target: Make iscsi_tpg_np driver show/store use generic code
  tcm_qla2xxx Add SCSI command jammer/discard capability
  iscsi-target: graceful disconnect on invalid mapping to iovec
  target: need_to_release is always false, remove redundant check and kfree
  target: remove sess_kref and ->shutdown_session
  iscsi-target: remove usage of ->shutdown_session
  tcm_qla2xxx: introduce a private sess_kref
  target: make close_session optional
  target: make ->shutdown_session optional
  target: remove acl_stop
  target: consolidate and fix session shutdown
  cxgbit: add files for cxgbit.ko
  iscsi-target: export symbols
  iscsi-target: call complete on conn_logout_comp
  iscsi-target: clear tx_thread_active
  iscsi-target: add new offload transport type
  iscsi-target: use conn_transport->transport_type in text rsp
  ...
2016-05-28 12:04:17 -07:00
Nicholas Bellinger
bd027d856d iscsi-target: Convert transport drivers to signal rdma_shutdown
Instead of special casing the handful of callers that check for
iser-target rdma verbs specific shutdown, use a simple flag at
iscsit_transport->rdma_shutdown so each driver can signal this.

Also, update iscsi-target/tcp + cxgbit to rdma_shutdown = false.

Cc: Varun Prakash <varun@chelsio.com>
Cc: Hariprasad Shenai <hariprasad@chelsio.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-05-16 22:23:33 -07:00
Christoph Hellwig
38a2d0d429 IB/isert: convert to the generic RDMA READ/WRITE API
Replace the homegrown RDMA READ/WRITE code in isert with the generic API,
which also adds iWarp support to the I/O path as a side effect.  Note
that full iWarp operation will need a few additional patches from Steve.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-13 13:37:20 -04:00
Christoph Hellwig
ff2ba99365 IB/core: Add passing an offset into the SG to ib_map_mr_sg
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-13 13:37:11 -04:00
Varun Prakash
187e84f7c2 iscsi-target: add void (*iscsit_get_rx_pdu)()
Add void (*iscsit_get_rx_pdu)() to
struct iscsit_transport, iscsi-target
uses this callback to receive and
process Rx iSCSI PDUs.

cxgbit.ko needs this callback to
reuse iscsi-target Rx thread.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-05-09 23:12:07 -07:00
Sagi Grimberg
572a143489 iser-target: Use ib_drain_qp
Now the rdma core offers a QP draining service in v4.6-rc1,
use it instead of our own.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-30 20:05:15 -07:00
Christoph Hellwig
e3416ab2d1 iser-target: Kill the ->isert_cmd back pointer in struct iser_tx_desc
We only use the pointer when processing regular iSER commands, and it then
always points to the struct iser_cmd that contains the TX descriptor.

Remove it and rely on container_of to save a little space and avoid a
pointer that is updated multiple times per processed command.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:51 -08:00
Christoph Hellwig
d1ca2ed7dc iser-target: Kill struct isert_rdma_wr
There is exactly one instance per struct isert_cmd, so merge the two to
simplify everyones life.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:49 -08:00
Christoph Hellwig
9679cc51eb iser-target: Convert to new CQ API
Use the workqueue based CQ type similar to what isert was using previously,
and properly split up the completion handlers.

Note that this also takes special care to handle the magic login WRs
separately, and also renames the submission functions so that it's clear
that they are only to be used for the login buffers.

(Fix up isert_print_wc usage in isert_beacon_done - nab)

Signed-off-by: Christoph Hellwig <hch@lst.de>
[sagig: added iscsi conn reinstatement in non-flush
 error completions and added error completion type print]
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:47 -08:00
Christoph Hellwig
5adabdd122 iser-target: Split and properly type the login buffer
The login receive buffer is used as a iser_rx_desc, so type it as such
in struct isert_conn and allocate the exactly right space for it.  The
TX buffer is moved to a separate variable and properly sized as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:44 -08:00
Christoph Hellwig
ed1083b251 iser-target: Remove ISER_RECV_DATA_SEG_LEN
This is the same as ISCSI_DEF_MAX_RECV_SEG_LEN (and must be the same given
the structure layouts), so just use that constant instead.  This also
allows removing ISER_RX_LOGIN_SIZE in favor of ISER_RX_PAYLOAD_SIZE.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:42 -08:00
Jenny Derzhavetz
26c7b673db iser-target: Remove impossible condition from isert_wait_conn
We can never get to isert_wait_conn in INIT state anymore, so
get rid of this condition.

Signed-off-by: Jenny Derzhavetz <jennyf@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:40 -08:00
Jenny Derzhavetz
69c48846f1 iser-target: Remove redundant wait in release_conn
With current termination flow we call release_conn after completion.

Signed-off-by: Jenny Derzhavetz <jennyf@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10 21:48:38 -08:00