wireguard-linux/drivers/nvme/target/core.c, branch jd/unified-crypt-queue

nvmet: make ctrl model configurable

2020-03-04T17:09:08Z

This patch adds a new target subsys attribute which allows user to optionally specify model name which then used in the nvmet_execute_identify_ctrl() to fill up the nvme_id_ctrl structure. The default value for the model is set to "Linux" for backward compatibility. Reviewed-by: Christoph Hellwig Reviewed-by: Sagi Grimberg Signed-off-by: Mark Ruijter [chaitanya.kulkarni@wdc.com *Use macro for default model, coding style fixes. *Use RCU for accessing model in for configfs and in nvmet_execute_identify_ctrl(). ] Signed-off-by: Chaitanya Kulkarni Signed-off-by: Keith Busch

nvmet: make ctrl-id configurable

2020-03-04T17:09:08Z

This patch adds a new target subsys attribute which allows user to optionally specify target controller IDs which then used in the nvmet_execute_identify_ctrl() to fill up the nvme_id_ctrl structure. For example, when using a cluster setup with two nodes, with a dual ported NVMe drive and exporting the drive from both the nodes, The connection to the host fails due to the same controller ID and results in the following error message:- "nvme nvmeX: Duplicate cntlid XXX with nvmeX, rejecting" With this patch now user can partition the controller IDs for each subsystem by setting up the cntlid_min and cntlid_max. These values will be used at the time of the controller ID creation. By partitioning the ctrl-ids for each subsystem results in the unique ctrl-id space which avoids the collision. When new attribute is not specified target will fall back to original cntlid calculation method. Reviewed-by: Christoph Hellwig Signed-off-by: Chaitanya Kulkarni Signed-off-by: Keith Busch

nvmet: update AEN list and array at one place

2020-02-04T16:56:10Z

All async events are enqueued via nvmet_add_async_event() which updates the ctrl->async_event_cmds[] array and additionally an struct nvmet_async_event is added to the ctrl->async_events list. Under normal operations the nvmet_async_event_work() updates again the ctrl->async_event_cmds and removes the corresponding struct nvmet_async_event from the list again. Though nvmet_sq_destroy() could be called which calls nvmet_async_events_free() which only updates the ctrl->async_event_cmds[] array. Add new functions nvmet_async_events_process() and nvmet_async_events_free() to process async events, update an array and the list. When we destroy submission queue after clearing the aen present on the ctrl->async list we also loop over ctrl->async_event_cmds[] for any requests posted by the host for which we don't have the AEN in the ctrl->async_events list by calling nvmet_async_event_process() and nvmet_async_events_free(). Reviewed-by: Christoph Hellwig Signed-off-by: Daniel Wagner [chaitanya.kulkarni@wdc.com * Loop over and clear out outstanding requests * Update changelog ] Signed-off-by: Chaitanya Kulkarni Signed-off-by: Keith Busch

nvmet: fix dsm failure when payload does not match sgl descriptor

2020-02-03T18:00:24Z

The host is allowed to pass the controller an sgl describing a buffer that is larger than the dsm payload itself, allow it when executing dsm. Reported-by: Dakshaja Uppalapati Reviewed-by: Christoph Hellwig , Reviewed-by: Max Gurtovoy Signed-off-by: Sagi Grimberg Signed-off-by: Keith Busch

nvmet: Pass lockdep expression to RCU lists

2020-02-03T18:00:24Z

ctrl->subsys->namespaces and subsys->namespaces are traversed with list_for_each_entry_rcu outside an RCU read-side critical section but under the protection of ctrl->subsys->lock and subsys->lock respectively. Hence, add the corresponding lockdep expression to the list traversal primitive to silence false-positive lockdep warnings, and harden RCU lists. Reported-by: kbuild test robot Reviewed-by: Joel Fernandes (Google) Signed-off-by: Amol Grover Signed-off-by: Keith Busch

nvmet: clean up command parsing a bit

2019-11-04T17:56:42Z

Move the special cases for fabrics commands and the discovery controller to nvmet_parse_admin_cmd in preparation for adding passthrough support. Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig Signed-off-by: Keith Busch Signed-off-by: Jens Axboe

nvmet: Open code nvmet_req_execute()

2019-11-04T17:56:42Z

Now that nvmet_req_execute does nothing, open code it. Reviewed-by: Chaitanya Kulkarni Signed-off-by: Christoph Hellwig [split patch, update changelog] Signed-off-by: Logan Gunthorpe Signed-off-by: Keith Busch Signed-off-by: Jens Axboe

nvmet: Remove the data_len field from the nvmet_req struct

2019-11-04T17:56:42Z

Instead of storing the expected length and checking it when it's executed, just check the length inside the command themselves. A new helper, nvmet_check_data_len() is created to help with this check. Signed-off-by: Christoph Hellwig [split patch, udpate changelog] Signed-off-by: Logan Gunthorpe Signed-off-by: Keith Busch Signed-off-by: Jens Axboe

nvmet: add unlikely check at nvmet_req_alloc_sgl

2019-11-04T17:56:40Z

The call to sgl_alloc shouldn't fail so add this simple optimization to the fast path. Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch Signed-off-by: Jens Axboe

nvmet-file: fix nvmet_file_flush() always returning an error

2019-08-01T00:57:21Z

Presently, nvmet_file_flush() always returns a call to errno_to_nvme_status() but that helper doesn't take into account the case when errno=0. So nvmet_file_flush() always returns an error code. All other callers of errno_to_nvme_status() check for success before calling it. To fix this, ensure errno_to_nvme_status() returns success if the errno is zero. This should prevent future mistakes like this from happening. Fixes: c6aa3542e010 ("nvmet: add error log support for file backend") Signed-off-by: Logan Gunthorpe Reviewed-by: Sagi Grimberg Reviewed-by: Chaitanya Kulkarni Signed-off-by: Sagi Grimberg