Commit Graph

113 Commits

Author SHA1 Message Date
Linus Torvalds
32a92f8c89 Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
This converts some of the visually simpler cases that have been split
over multiple lines.  I only did the ones that are easy to verify the
resulting diff by having just that final GFP_KERNEL argument on the next
line.

Somebody should probably do a proper coccinelle script for this, but for
me the trivial script actually resulted in an assertion failure in the
middle of the script.  I probably had made it a bit _too_ trivial.

So after fighting that far a while I decided to just do some of the
syntactically simpler cases with variations of the previous 'sed'
scripts.

The more syntactically complex multi-line cases would mostly really want
whitespace cleanup anyway.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 20:03:00 -08:00
Linus Torvalds
323bbfcf1e Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
This is the exact same thing as the 'alloc_obj()' version, only much
smaller because there are a lot fewer users of the *alloc_flex()
interface.

As with alloc_obj() version, this was done entirely with mindless brute
force, using the same script, except using 'flex' in the pattern rather
than 'objs*'.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00
Linus Torvalds
bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00
Kees Cook
69050f8d6d treewide: Replace kmalloc with kmalloc_obj for non-scalar types
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-21 01:02:28 -08:00
Daniel Wagner
57413f0899 nvmet-fc: use pr_* print macros instead of dev_*
Many of the nvmet-fc log messages cannot print the device used, because
it's not there yet:

  (NULL device *): {0:0} Association deleted

Use the pr_* macros consistently throughout the module and match the
output of the nvme-fc module.

Using port:association ids are more useful when debugging what's going
on, because these match now with the log entries from nvme-fc.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-12-04 14:46:13 -08:00
Daniel Wagner
f2537be4f8 nvmet-fc: avoid scheduling association deletion twice
When forcefully shutting down a port via the configfs interface,
nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and
then nvmet_disable_port(). Both functions will eventually schedule all
remaining associations for deletion.

The current implementation checks whether an association is about to be
removed, but only after the work item has already been scheduled. As a
result, it is possible for the first scheduled work item to free all
resources, and then for the same work item to be scheduled again for
deletion.

Because the association list is an RCU list, it is not possible to take
a lock and remove the list entry directly, so it cannot be looked up
again. Instead, a flag (terminating) must be used to determine whether
the association is already in the process of being deleted.

Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Closes: https://lore.kernel.org/all/rsdinhafrtlguauhesmrrzkybpnvwantwmyfq2ih5aregghax5@mhr7v3eryci3/
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-09-15 08:52:57 -07:00
Daniel Wagner
db5a5406fb nvmet-fc: move lsop put work to nvmet_fc_ls_req_op
It’s possible for more than one async command to be in flight from
__nvmet_fc_send_ls_req. For each command, a tgtport reference is taken.

In the current code, only one put work item is queued at a time, which
results in a leaked reference.

To fix this, move the work item to the nvmet_fc_ls_req_op struct, which
already tracks all resources related to the command.

Fixes: 710c69dbac ("nvmet-fc: avoid deadlock on delete association path")
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-09-15 08:52:57 -07:00
Bjorn Helgaas
367c240b0a nvme: fix various comment typos
Fix typos in comments.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-07-31 06:35:58 -07:00
Yi Zhang
44e479d720 nvme: spelling fixes
Fix various spelling errors in comments.

Signed-off-by: Yi Zhang <yi.zhang@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-06-04 10:23:28 +02:00
Daniel Wagner
596cba55ad nvmet-fc: take tgtport refs for portentry
Ensure that the tgtport is not going away as long portentry has a
pointer on it.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20 05:34:26 +02:00
Daniel Wagner
bbccbf791e nvmet-fc: free pending reqs on tgtport unregister
When nvmet_fc_unregister_targetport is called by the LLDD, it's not
possible to communicate with the host, thus all pending request will not
be process. Thus explicitly free them.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20 05:34:26 +02:00
Wilfred Mallawa
87b4d5ec0d nvmet: simplify the nvmet_req_init() interface
Now that a submission queue holds a reference to its completion queue,
there is no need to pass the cq argument to nvmet_req_init(), so remove
it.

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20 05:34:26 +02:00
Wilfred Mallawa
94ee8708c9 nvmet: support completion queue sharing
The NVMe PCI transport specification allows for completion queues to be
shared by different submission queues.

This patch allows a submission queue to keep track of the completion queue
it is using with reference counting. As such, it can be ensured that a
completion queue is not deleted while a submission queue is actively
using it.

This patch enables completion queue sharing in the pci-epf target driver.
For fabrics drivers, completion queue sharing is not enabled as it is
not possible as per the fabrics specification. However, this patch
modifies the fabrics drivers to correctly integrate the new API that
supports completion queue sharing.

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20 05:34:26 +02:00
Wilfred Mallawa
bb78836b3a nvmet: fabrics: add CQ init and destroy
With struct nvmet_cq now having a reference count, this patch amends the
target fabrics call chain to initialize and destroy/put a completion
queue.

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20 05:34:25 +02:00
Daniel Wagner
70289ae5ca nvmet-fc: put ref when assoc->del_work is already scheduled
Do not leak the tgtport reference when the work is already scheduled.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-04-09 13:03:56 +02:00
Daniel Wagner
b0b26ad0e1 nvmet-fc: take tgtport reference only once
The reference counting code can be simplified. Instead taking a tgtport
refrerence at the beginning of nvmet_fc_alloc_hostport and put it back
if not a new hostport object is allocated, only take it when a new
hostport object is allocated.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-04-09 13:03:56 +02:00
Daniel Wagner
1a90956573 nvmet-fc: update tgtport ref per assoc
We need to take for each unique association a reference.
nvmet_fc_alloc_hostport for each newly created association.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-04-09 13:03:56 +02:00
Daniel Wagner
88517565b5 nvmet-fc: inline nvmet_fc_free_hostport
No need for this tiny helper with only one user, let's inline it.

And since the hostport ref counter needs to stay in sync, it's not
optional anymore to give back the reference.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-04-09 13:03:56 +02:00
Daniel Wagner
aeaa0913a6 nvmet-fc: inline nvmet_fc_delete_assoc
No need for this tiny helper with only one user, just inline it.

Signed-off-by: Daniel Wagner <wagi@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-04-09 13:03:55 +02:00
WangYuli
1b304c006b nvmet-fc: Remove unused functions
The functions nvmet_fc_iodnum() and nvmet_fc_fodnum() are currently
unutilized.

Following commit c53432030d ("nvme-fabrics: Add target support for FC
transport"), which introduced these two functions, they have not been
used at all in practice.

Remove them to resolve the compiler warnings.

Fix follow errors with clang-19 when W=1e:
  drivers/nvme/target/fc.c:177:1: error: unused function 'nvmet_fc_iodnum' [-Werror,-Wunused-function]
    177 | nvmet_fc_iodnum(struct nvmet_fc_ls_iod *iodptr)
        | ^~~~~~~~~~~~~~~
  drivers/nvme/target/fc.c:183:1: error: unused function 'nvmet_fc_fodnum' [-Werror,-Wunused-function]
    183 | nvmet_fc_fodnum(struct nvmet_fc_fcp_iod *fodptr)
        | ^~~~~~~~~~~~~~~
  2 errors generated.
  make[8]: *** [scripts/Makefile.build:207: drivers/nvme/target/fc.o] Error 1
  make[7]: *** [scripts/Makefile.build:465: drivers/nvme/target] Error 2
  make[6]: *** [scripts/Makefile.build:465: drivers/nvme] Error 2
  make[6]: *** Waiting for unfinished jobs....

Fixes: c53432030d ("nvme-fabrics: Add target support for FC transport")
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20 16:53:55 -07:00
Linus Torvalds
3e78198862 Merge tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe:

 - NVMe updates via Keith:
     - Device initialization memory leak fixes (Keith)
     - More constants defined (Weiwen)
     - Target debugfs support (Hannes)
     - PCIe subsystem reset enhancements (Keith)
     - Queue-depth multipath policy (Redhat and PureStorage)
     - Implement get_unique_id (Christoph)
     - Authentication error fixes (Gaosheng)

 - MD updates via Song
     - sync_action fix and refactoring (Yu Kuai)
     - Various small fixes (Christoph Hellwig, Li Nan, and Ofir Gal, Yu
       Kuai, Benjamin Marzinski, Christophe JAILLET, Yang Li)

 - Fix loop detach/open race (Gulam)

 - Fix lower control limit for blk-throttle (Yu)

 - Add module descriptions to various drivers (Jeff)

 - Add support for atomic writes for block devices, and statx reporting
   for same. Includes SCSI and NVMe (John, Prasad, Alan)

 - Add IO priority information to block trace points (Dongliang)

 - Various zone improvements and tweaks (Damien)

 - mq-deadline tag reservation improvements (Bart)

 - Ignore direct reclaim swap writes in writeback throttling (Baokun)

 - Block integrity improvements and fixes (Anuj)

 - Add basic support for rust based block drivers. Has a dummy null_blk
   variant for now (Andreas)

 - Series converting driver settings to queue limits, and cleanups and
   fixes related to that (Christoph)

 - Cleanup for poking too deeply into the bvec internals, in preparation
   for DMA mapping API changes (Christoph)

 - Various minor tweaks and fixes (Jiapeng, John, Kanchan, Mikulas,
   Ming, Zhu, Damien, Christophe, Chaitanya)

* tag 'for-6.11/block-20240710' of git://git.kernel.dk/linux: (206 commits)
  floppy: add missing MODULE_DESCRIPTION() macro
  loop: add missing MODULE_DESCRIPTION() macro
  ublk_drv: add missing MODULE_DESCRIPTION() macro
  xen/blkback: add missing MODULE_DESCRIPTION() macro
  block/rnbd: Constify struct kobj_type
  block: take offset into account in blk_bvec_map_sg again
  block: fix get_max_segment_size() warning
  loop: Don't bother validating blocksize
  virtio_blk: Don't bother validating blocksize
  null_blk: Don't bother validating blocksize
  block: Validate logical block size in blk_validate_limits()
  virtio_blk: Fix default logical block size fallback
  nvmet-auth: fix nvmet_auth hash error handling
  nvme: implement ->get_unique_id
  block: pass a phys_addr_t to get_max_segment_size
  block: add a bvec_phys helper
  blk-lib: check for kill signal in ioctl BLKZEROOUT
  block: limit the Write Zeroes to manually writing zeroes fallback
  block: refacto blkdev_issue_zeroout
  block: move read-only and supported checks into (__)blkdev_issue_zeroout
  ...
2024-07-15 14:20:22 -07:00
Nathan Chancellor
440e2051c5 nvmet-fc: Remove __counted_by from nvmet_fc_tgt_queue.fod[]
Work for __counted_by on generic pointers in structures (not just
flexible array members) has started landing in Clang 19 (current tip of
tree). During the development of this feature, a restriction was added
to __counted_by to prevent the flexible array member's element type from
including a flexible array member itself such as:

  struct foo {
    int count;
    char buf[];
  };

  struct bar {
    int count;
    struct foo data[] __counted_by(count);
  };

because the size of data cannot be calculated with the standard array
size formula:

  sizeof(struct foo) * count

This restriction was downgraded to a warning but due to CONFIG_WERROR,
it can still break the build. The application of __counted_by on the fod
member of 'struct nvmet_fc_tgt_queue' triggers this restriction,
resulting in:

  drivers/nvme/target/fc.c:151:2: error: 'counted_by' should not be applied to an array with element of unknown size because 'struct nvmet_fc_fcp_iod' is a struct type with a flexible array member. This will be an error in a future compiler version [-Werror,-Wbounds-safety-counted-by-elt-type-unknown-size]
    151 |         struct nvmet_fc_fcp_iod         fod[] __counted_by(sqsize);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  1 error generated.

Remove this use of __counted_by to fix the warning/error. However,
rather than remove it altogether, leave it commented, as it may be
possible to support this in future compiler releases.

Cc: stable@vger.kernel.org
Closes: https://github.com/ClangBuiltLinux/linux/issues/2027
Fixes: ccd3129aca ("nvmet-fc: Annotate struct nvmet_fc_tgt_queue with __counted_by")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-06-26 10:13:04 -07:00
Hannes Reinecke
99032e9dba nvmet-fc: implement host_traddr()
Implement callback to display the host transport address by
adding a callback 'host_traddr' for nvmet_fc_target_template.

Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-06-24 12:53:43 -07:00
Daniel Wagner
db67bb39ef nvmet-fc: move RCU read lock to nvmet_fc_assoc_exists
The RCU lock is only needed for the lookup loop and not for
list_ad_tail_rcu call. Thus move it down the call chain into
nvmet_fc_assoc_exists.

While at it also fix the name typo of the function.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-04-04 08:47:56 -07:00
Daniel Wagner
a90ac7b348 nvmet-fc: use RCU list iterator for assoc_list
The assoc_list is a RCU protected list, thus use the RCU flavor of list
functions.

Let's use this opportunity and refactor this code and move the lookup
into a helper and give it a descriptive name.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:52 -08:00
Daniel Wagner
fe506a7458 nvmet-fc: take ref count on tgtport before delete assoc
We have to ensure that the tgtport is not going away
before be have remove all the associations.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:52 -08:00
Daniel Wagner
710c69dbac nvmet-fc: avoid deadlock on delete association path
When deleting an association the shutdown path is deadlocking because we
try to flush the nvmet_wq nested. Avoid this by deadlock by deferring
the put work into its own work item.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:52 -08:00
Daniel Wagner
3146345c2e nvmet-fc: abort command when there is no binding
When the target port has not active port binding, there is no point in
trying to process the command as it has to fail anyway. Instead adding
checks to all commands abort the command early.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:51 -08:00
Daniel Wagner
1c110588dd nvmet-fc: do not tack refs on tgtports from assoc
The association life time is tied to the life time of the target port.
That means we should not take extra a refcount when creating a
association.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:51 -08:00
Daniel Wagner
50b474e1fa nvmet-fc: remove null hostport pointer check
An association has always a valid hostport pointer. Remove useless
null pointer check.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:51 -08:00
Daniel Wagner
ca121a0f75 nvmet-fc: hold reference on hostport match
The hostport data structure is shared between the association, this why
we keep track of the users via a refcount. So we should not decrement
the refcount on a match and free the hostport several times.

Reported by KASAN.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:51 -08:00
Daniel Wagner
c5e27b1a77 nvmet-fc: free queue and assoc directly
Neither struct nvmet_fc_tgt_queue nor struct nvmet_fc_tgt_assoc are data
structure which are used in a RCU context. So there is no reason to
delay the free operation.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:51 -08:00
Daniel Wagner
4049dc96b8 nvmet-fc: defer cleanup using RCU properly
When the target executes a disconnect and the host triggers a reconnect
immediately, the reconnect command still finds an existing association.

The reconnect crashes later on because nvmet_fc_delete_target_assoc
blindly removes resources while the reconnect code wants to use it.

To address this, nvmet_fc_find_target_assoc should not be able to
lookup an association which is being removed. The association list
is already under RCU lifetime management, so let's properly use it
and remove the association from the list and wait for a grace period
before cleaning up all. This means we also can drop the RCU management
on the queues, because this is now handled via the association itself.

A second step split the execution context so that the initial disconnect
command can complete without running the reconnect code in the same
context. As usual, this is done by deferring the ->done to a workqueue.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:46 -08:00
Daniel Wagner
c691e6d7e1 nvmet-fc: release reference on target port
In case we return early out of __nvmet_fc_finish_ls_req() we still have
to release the reference on the target port.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-02-01 07:44:46 -08:00
Chaitanya Kulkarni
41951f83ef nvmet: add module description to stop warnings
Add MODULE_DESCRIPTION() in order to remove warnings & get clean build:-

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvmet.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvme-loop.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvmet-rdma.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvmet-fc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvme-fcloop.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/nvme/target/nvmet-tcp.o

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-01-24 07:25:04 -08:00
Daniel Wagner
72e8c9379d nvmet-fc: remove unnecessary bracket
There is no need for the bracket around the identifier. Remove it.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2024-01-03 08:09:41 -08:00
Kees Cook
ccd3129aca nvmet-fc: Annotate struct nvmet_fc_tgt_queue with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for
array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct
nvmet_fc_tgt_queue. Additionally, since the element count member must
be set before accessing the annotated flexible array member, move its
initialization earlier.

Cc: James Smart <james.smart@broadcom.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-nvme@lists.infradead.org
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
2023-10-05 09:29:04 -07:00
Amit Engel
0cab440487 nvme-fc: fix a missing queue put in nvmet_fc_ls_create_association
As part of nvmet_fc_ls_create_association there is a case where
nvmet_fc_alloc_target_queue fails right after a new association with an
admin queue is created. In this case, no one releases the get taken in
nvmet_fc_alloc_target_assoc.  This fix is adding the missing put.

Signed-off-by: Amit Engel <Amit.Engel@dell.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2023-02-01 14:18:46 +01:00
Sagi Grimberg
8832cf9221 nvmet: use a private workqueue instead of the system workqueue
Any attempt to flush kernel-global WQs has possibility of deadlock
so we should simply stop using them, instead introduce nvmet_wq
which is the generic nvmet workqueue for work elements that
don't explicitly require a dedicated workqueue (by the mere fact
that they are using the system_wq).

Changes were done using the following replaces:

 - s/schedule_work(/queue_work(nvmet_wq, /g
 - s/schedule_delayed_work(/queue_delayed_work(nvmet_wq, /g
 - s/flush_scheduled_work()/flush_workqueue(nvmet_wq)/g

Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-29 09:29:04 +02:00
Chaitanya Kulkarni
0acb8231eb nvmet-fc: fix kernel-doc warning for nvmet_fc_unregister_targetport
This fixes following kernel-doc warning:-

drivers/nvme/target/fc.c:1619: warning: expecting prototype for nvme_fc_unregister_targetport(). Prototype was for nvmet_fc_unregister_targetport() instead

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-14 08:43:06 +01:00
Chaitanya Kulkarni
b2fb99e425 nvmet-fc: fix kernel-doc warning for nvmet_fc_register_targetport
This fixes following kernel-doc warning :-

drivers/nvme/target/fc.c:1365: warning: expecting prototype for nvme_fc_register_targetport(). Prototype was for nvmet_fc_register_targetport() instead

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-03-14 08:43:06 +01:00
Sagi Grimberg
6dd0f465d5 nvmet-fc: replace ida_simple[get|remove] with the simler ida_[alloc|free]
ida_simple_[get|remove] are wrappers anyways.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2022-02-28 13:45:05 +02:00
Hannes Reinecke
2a4a910aa4 nvmet-fc: do not check for invalid target port in nvmet_fc_handle_fcp_rqst()
When parsing a request in nvmet_fc_handle_fcp_rqst() we should not
check for invalid target ports; if we do the command is aborted
from the fcp layer, causing the host to assume a transport error.
Rather we should still forward this request to the nvmet layer, which
will then correctly fail the command with an appropriate error status.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-06-17 15:51:19 +02:00
Amit Engel
0d8ddeea11 nvmet-fc: simplify nvmet_fc_alloc_hostport
Once a host is already created, avoid allocate additional hostports that
will be thrown away. add an helper function to handle host search.

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Amit Engel <amit.engel@dell.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-15 08:12:53 +02:00
Chaitanya Kulkarni
b53d47418d nvmet-fc: update function documentation
Add minimum description of the hosthandle parameter for
nvmet_fc_rcv_ls_req() so that we can get rid of the following warning.

drivers/nvme//target/fc.c:2009: warning: Function parameter or member 'hosthandle' not described in 'nvmet_fc_rcv_ls_req

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-04-02 18:48:27 +02:00
Christoph Hellwig
b5df8e79a2 nvmet-fc: add a missing __rcu annotation to nvmet_fc_tgt_assoc.queues
Make sparse happy after the recent conversion to RCU lookups.

Fixes: 4e2f02bf77 ("nvmet-fc: use RCU proctection for assoc_list")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
2021-02-10 16:38:04 +01:00
Leonid Ravich
4e2f02bf77 nvmet-fc: use RCU proctection for assoc_list
searching assoc_list protected by rcu_read_lock if list not changed inline.
and according to the rcu list rules.

queue array embedded into nvmet_fc_tgt_assoc protected by rcu_read_lock
according to rcu dereference/assign rules.

queue and assoc object freed after grace period by call_rcu.

tgtport lock taken for changing assoc_list.

Reviewed-by: Eldad Zinger <Eldad.Zinger@dell.com>
Reviewed-by: Elad Grupi <Elad.Grupi@dell.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Leonid Ravich <Leonid.Ravich@emc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2021-02-02 10:26:10 +01:00
James Smart
ddd3d10517 nvmet-fc: fix missing check for no hostport struct
A hostport port pointer is allowed to be NULL as it is not allocated if
the lldd does not support the new interfaces for NVME LS request support.
The hostport free routine validates the handle but forgot to validate the
hostport pointer.

Validate the hostport pointer before using it to validate the handle.

Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-27 09:14:19 +02:00
Christophe JAILLET
70e37988db nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()'
The way 'spin_lock()' and 'spin_lock_irqsave()' are used is not consistent
in this function.

Use 'spin_lock_irqsave()' also here, as there is no guarantee that
interruptions are disabled at that point, according to surrounding code.

Fixes: a97ec51b37 ("nvmet_fc: Rework target side abort handling")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2020-08-28 16:43:57 -07:00
James Smart
ece0278c1c nvmet-fc: remove redundant del_work_active flag
The transport has a del_work_active flag to avoid duplicate scheduling
of the del_work item. This is redundant with the checks that
schedule_work() makes.

Remove the del_work_active flag.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-07-29 07:45:20 +02:00