diff options
| -rw-r--r-- | drivers/block/rbd.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index f4b1b91..d5a5149 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -732,6 +732,7 @@ static struct rbd_client *rbd_client_find(struct ceph_options *ceph_opts) */ enum { Opt_queue_depth, + Opt_lock_timeout, Opt_last_int, /* int args above */ Opt_last_string, @@ -745,6 +746,7 @@ enum { static match_table_t rbd_opts_tokens = { {Opt_queue_depth, "queue_depth=%d"}, + {Opt_lock_timeout, "lock_timeout=%d"}, /* int args above */ /* string args above */ {Opt_read_only, "read_only"}, @@ -758,12 +760,14 @@ static match_table_t rbd_opts_tokens = { struct rbd_options { int queue_depth; + unsigned long lock_timeout; bool read_only; bool lock_on_read; bool exclusive; }; #define RBD_QUEUE_DEPTH_DEFAULT BLKDEV_MAX_RQ +#define RBD_LOCK_TIMEOUT_DEFAULT 0 /* no timeout */ #define RBD_READ_ONLY_DEFAULT false #define RBD_LOCK_ON_READ_DEFAULT false #define RBD_EXCLUSIVE_DEFAULT false @@ -796,6 +800,14 @@ static int parse_rbd_opts_token(char *c, void *private) } rbd_opts->queue_depth = intval; break; + case Opt_lock_timeout: + /* 0 is "wait forever" (i.e. infinite timeout) */ + if (intval < 0 || intval > INT_MAX / 1000) { + pr_err("lock_timeout out of range\n"); + return -EINVAL; + } + rbd_opts->lock_timeout = msecs_to_jiffies(intval * 1000); + break; case Opt_read_only: rbd_opts->read_only = true; break; @@ -3536,6 +3548,7 @@ static int rbd_obj_method_sync(struct rbd_device *rbd_dev, static int rbd_wait_state_locked(struct rbd_device *rbd_dev, bool may_acquire) { DEFINE_WAIT(wait); + unsigned long timeout; int ret = 0; if (test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags)) @@ -3559,12 +3572,18 @@ static int rbd_wait_state_locked(struct rbd_device *rbd_dev, bool may_acquire) prepare_to_wait_exclusive(&rbd_dev->lock_waitq, &wait, TASK_UNINTERRUPTIBLE); up_read(&rbd_dev->lock_rwsem); - schedule(); + timeout = schedule_timeout(ceph_timeout_jiffies( + rbd_dev->opts->lock_timeout)); down_read(&rbd_dev->lock_rwsem); if (test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags)) { ret = -EBLACKLISTED; break; } + if (!timeout) { + rbd_warn(rbd_dev, "timed out waiting for lock"); + ret = -ETIMEDOUT; + break; + } } while (rbd_dev->lock_state != RBD_LOCK_STATE_LOCKED); finish_wait(&rbd_dev->lock_waitq, &wait); @@ -5186,6 +5205,7 @@ static int rbd_add_parse_args(const char *buf, rbd_opts->read_only = RBD_READ_ONLY_DEFAULT; rbd_opts->queue_depth = RBD_QUEUE_DEPTH_DEFAULT; + rbd_opts->lock_timeout = RBD_LOCK_TIMEOUT_DEFAULT; rbd_opts->lock_on_read = RBD_LOCK_ON_READ_DEFAULT; rbd_opts->exclusive = RBD_EXCLUSIVE_DEFAULT; |
