linux-toradex.git/drivers/infiniband/ulp/rtrs, branch v6.4-rc6

driver core: class: remove module * from class_create()

2023-03-17T14:16:33+00:00

The module pointer in class_create() never actually did anything, and it
shouldn't have been requred to be set as a parameter even if it did
something.  So just remove it and fix up all callers of the function in
the kernel tree at the same time.

Cc: "Rafael J. Wysocki" 
Acked-by: Benjamin Tissoires 
Link: https://lore.kernel.org/r/20230313181843.1207845-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

RDMA/rtrs: Don't call kobject_del for srv_path->kobj

2023-02-07T09:21:32+00:00

As the mention in commmit f7452a7e96c1 ("RDMA/rtrs-srv: fix memory leak by missing kobject free"),
it was intended to remove the kobject_del for srv_path->kobj.

f7452a7e96c1 said:
>This patch moves kobject_del() into free_sess() so that the kobject of
>    rtrs_srv_sess can be freed.

This patch also move rtrs_srv_destroy_once_sysfs_root_folders back to
'if (srv_path->kobj.state_in_sysfs)' block to avoid a 'held lock freed!'

A kernel panic will be triggered by following script
-----------------------
$ while true
do
        echo "sessname=foo path=ip: device_path=/dev/nvme0n1" > /sys/devices/virtual/rnbd-client/ctl/map_device
        echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
done
-----------------------
The bisection pointed to commit 6af4609c18b3 ("RDMA/rtrs-srv: Fix several issues in rtrs_srv_destroy_path_files")
at last.

 rnbd_server L777: : Opened device 'nvme0n1'
 general protection fault, probably for non-canonical address 0x765f766564753aea: 0000 [#1] PREEMPT SMP PTI
 CPU: 0 PID: 3558 Comm: systemd-udevd Kdump: loaded Not tainted 6.1.0-rc3-roce-flush+ #51
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
 RIP: 0010:kernfs_dop_revalidate+0x36/0x180
 Code: 00 00 41 55 41 54 55 53 48 8b 47 68 48 89 fb 48 85 c0 0f 84 db 00 00 00 48 8b a8 60 04 00 00 48 8b 45 30 48 85 c0 48 0f 44 c5 <4c> 8b 60 78 49 81 c4 d8 00 00 00 4c 89 e7 e8 b7 78 7b 00 8b 05 3d
 RSP: 0018:ffffaf1700b67c78 EFLAGS: 00010206
 RAX: 765f766564753a72 RBX: ffff89e2830849c0 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff89e2830849c0
 RBP: ffff89e280361bd0 R08: 0000000000000000 R09: 0000000000000001
 R10: 0000000000000065 R11: 0000000000000000 R12: ffff89e2830849c0
 R13: ffff89e283084888 R14: d0d0d0d0d0d0d0d0 R15: 2f2f2f2f2f2f2f2f
 FS:  00007f13fbce7b40(0000) GS:ffff89e2bbc00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00007f93e055d340 CR3: 0000000104664002 CR4: 00000000001706f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 Call Trace:
  
  lookup_fast+0x7b/0x100
  walk_component+0x21/0x160
  link_path_walk.part.0+0x24d/0x390
  path_openat+0xad/0x9a0
  do_filp_open+0xa9/0x150
  ? lock_release+0x13c/0x2e0
  ? _raw_spin_unlock+0x29/0x50
  ? alloc_fd+0x124/0x1f0
  do_sys_openat2+0x9b/0x160
  __x64_sys_openat+0x54/0xa0
  do_syscall_64+0x3b/0x90
  entry_SYSCALL_64_after_hwframe+0x63/0xcd
 RIP: 0033:0x7f13fc9d701b
 Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
 RSP: 002b:00007ffddf242640 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13fc9d701b
 RDX: 0000000000080000 RSI: 00007ffddf2427c0 RDI: 00000000ffffff9c
 RBP: 00007ffddf2427c0 R08: 00007f13fcc5b440 R09: 21b2131aa64b1ef2
 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
 R13: 00007ffddf2427c0 R14: 000055ed13be8db0 R15: 0000000000000000

Fixes: 6af4609c18b3 ("RDMA/rtrs-srv: Fix several issues in rtrs_srv_destroy_path_files")
Acked-by: Guoqing Jiang 
Signed-off-by: Li Zhijian 
Link: https://lore.kernel.org/r/1675332721-2-1-git-send-email-lizhijian@fujitsu.com
Acked-by: Jack Wang 
Signed-off-by: Leon Romanovsky

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

2022-12-14T17:27:13+00:00

Pull rdma updates from Jason Gunthorpe:
 "Usual size of updates, a new driver, and most of the bulk focusing on
  rxe:

   - Usual typos, style, and language updates

   - Driver updates for mlx5, irdma, siw, rts, srp, hfi1, hns, erdma,
     mlx4, srp

   - Lots of RXE updates:
      * Improve reply error handling for bad MR operations
      * Code tidying
      * Debug printing uses common loggers
      * Remove half implemented RD related stuff
      * Support IBA's recently defined Atomic Write and Flush operations

   - erdma support for atomic operations

   - New driver 'mana' for Ethernet HW available in Azure VMs. This
     driver only supports DPDK"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (122 commits)
  IB/IPoIB: Fix queue count inconsistency for PKEY child interfaces
  RDMA: Add missed netdev_put() for the netdevice_tracker
  RDMA/rxe: Enable RDMA FLUSH capability for rxe device
  RDMA/cm: Make QP FLUSHABLE for supported device
  RDMA/rxe: Implement flush completion
  RDMA/rxe: Implement flush execution in responder side
  RDMA/rxe: Implement RC RDMA FLUSH service in requester side
  RDMA/rxe: Extend rxe packet format to support flush
  RDMA/rxe: Allow registering persistent flag for pmem MR only
  RDMA/rxe: Extend rxe user ABI to support flush
  RDMA: Extend RDMA kernel verbs ABI to support flush
  RDMA: Extend RDMA user ABI to support flush
  RDMA/rxe: Fix incorrect responder length checking
  RDMA/rxe: Fix oops with zero length reads
  RDMA/mlx5: Remove not-used IB_FLOW_SPEC_IB define
  RDMA/hns: Fix XRC caps on HIP08
  RDMA/hns: Fix error code of CMD
  RDMA/hns: Fix page size cap from firmware
  RDMA/hns: Fix PBL page MTR find
  RDMA/hns: Fix AH attr queried by query_qp
  ...

Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2022-12-13T02:29:54+00:00

Pull iov_iter updates from Al Viro:
 "iov_iter work; most of that is about getting rid of direction
  misannotations and (hopefully) preventing more of the same for the
  future"

* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  use less confusing names for iov_iter direction initializers
  iov_iter: saner checks for attempt to copy to/from iterator
  [xen] fix "direction" argument of iov_iter_kvec()
  [vhost] fix 'direction' argument of iov_iter_{init,bvec}()
  [target] fix iov_iter_bvec() "direction" argument
  [s390] memcpy_real(): WRITE is "data source", not destination...
  [s390] zcore: WRITE is "data source", not destination...
  [infiniband] READ is "data destination", not source...
  [fsi] WRITE is "data source", not destination...
  [s390] copy_oldmem_kernel() - WRITE is "data source", not destination
  csum_and_copy_to_iter(): handle ITER_DISCARD
  get rid of unlikely() on page_copy_sane() calls

use less confusing names for iov_iter direction initializers

2022-11-25T18:01:55+00:00

READ/WRITE proved to be actively confusing - the meanings are
"data destination, as used with read(2)" and "data source, as
used with write(2)", but people keep interpreting those as
"we read data from it" and "we write data to it", i.e. exactly
the wrong way.

Call them ITER_DEST and ITER_SOURCE - at least that is harder
to misinterpret...

Signed-off-by: Al Viro

[infiniband] READ is "data destination", not source...

2022-11-25T18:01:20+00:00

Signed-off-by: Al Viro

treewide: use get_random_u32_below() instead of deprecated function

2022-11-18T01:15:15+00:00

This is a simple mechanical transformation done by:

@@
expression E;
@@
- prandom_u32_max
+ get_random_u32_below
  (E)

Reviewed-by: Kees Cook 
Reviewed-by: Greg Kroah-Hartman 
Acked-by: Darrick J. Wong  # for xfs
Reviewed-by: SeongJae Park  # for damon
Reviewed-by: Jason Gunthorpe  # for infiniband
Reviewed-by: Russell King (Oracle)  # for arm
Acked-by: Ulf Hansson  # for mmc
Signed-off-by: Jason A. Donenfeld

RDMA/rtrs-srv: Remove kobject_del from rtrs_srv_destroy_once_sysfs_root_folders

2022-11-17T11:47:28+00:00

The kobj_paths which is created dynamically by kobject_create_and_add,
and per the comment above kobject_create_and_add, we only need to call
kobject_put which is not same as other kobjs such as stats->kobj_stats
and srv_path->kobj.

Acked-by: Md Haris Iqbal 
Signed-off-by: Guoqing Jiang 
Link: https://lore.kernel.org/r/20221117101945.6317-9-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky

RDMA/rtrs-srv: Fix several issues in rtrs_srv_destroy_path_files

2022-11-17T11:47:28+00:00

There are several issues in the function which is supposed to be paired
with rtrs_srv_create_path_files.

1. rtrs_srv_stats_attr_group is not removed though it is created in
   rtrs_srv_create_stats_files.

2. it makes more sense to check kobj_stats.state_in_sysfs before destroy
   kobj_stats instead of rely on kobj.state_in_sysfs.

3. kobject_init_and_add is used for both kobjs (srv_path->kobj and
   srv_path->stats->kobj_stats), however we missed to call kobject_del
   for srv_path->kobj which was called in free_path.

4. rtrs_srv_destroy_once_sysfs_root_folders is independent of either
   kobj or kobj_stats.

Acked-by: Md Haris Iqbal 
Signed-off-by: Guoqing Jiang 
Link: https://lore.kernel.org/r/20221117101945.6317-8-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky

RDMA/rtrs: Clean up rtrs_rdma_dev_pd_ops

2022-11-17T11:47:28+00:00

Let's remove them since the three members are not used.

Acked-by: Md Haris Iqbal 
Signed-off-by: Guoqing Jiang 
Link: https://lore.kernel.org/r/20221117101945.6317-7-guoqing.jiang@linux.dev
Signed-off-by: Leon Romanovsky