diff options
| author |   Keith Busch <keith.busch@intel.com> | 2014-03-03 16:39:13 -0700 |
|---|---|---|
| committer |   Matthew Wilcox <matthew.r.wilcox@intel.com> | 2014-03-24 08:54:40 -0400 |
| commit | 4f5099af4f3d5f999d8ab7784472d93e810e3912 (patch) | |
| tree | f0dc2bc897e723037ae63a5f7f41bb3bff710399 /include/linux/nvme.h | |
| parent | NVMe: RCU protected access to io queues (diff) | |
| download | linux-dev-4f5099af4f3d5f999d8ab7784472d93e810e3912.tar.xz linux-dev-4f5099af4f3d5f999d8ab7784472d93e810e3912.zip | |
NVMe: IOCTL path RCU protect queue access
This adds rcu protected access to a queue in the nvme IOCTL path
to fix potential races between a surprise removal and queue usage in
nvme_submit_sync_cmd. The fix holds the rcu_read_lock() here to prevent
the nvme_queue from freeing while this path is executing so it can't
sleep, and so this path will no longer wait for a available command
id should they all be in use at the time a passthrough IOCTL request
is received.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'include/linux/nvme.h')
| -rw-r--r-- | include/linux/nvme.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 98d367b06f9c..7c3f85bc10f1 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -151,10 +151,7 @@ struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, unsigned long addr, unsigned length); void nvme_unmap_user_pages(struct nvme_dev *dev, int write, struct nvme_iod *iod); -struct nvme_queue *get_nvmeq(struct nvme_dev *dev); -void put_nvmeq(struct nvme_queue *nvmeq); -int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, - u32 *result, unsigned timeout); +int nvme_submit_io_cmd(struct nvme_dev *, struct nvme_command *, u32 *); int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns); int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *, u32 *result); |