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| author | Alex Elder <elder@inktank.com> | 2012-07-25 16:32:41 +0200 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-07-31 03:21:46 +0200 |
| commit | 1fe5e9932156f6122c3b1ff6ba7541c27c86718c (patch) | |
| tree | c5218897ce6cfbc3e2d5686772eb2bdabf415c89 /drivers/block/rbd.c | |
| parent | rbd: return obj version in __rbd_refresh_header() (diff) | |
| download | linux-1fe5e9932156f6122c3b1ff6ba7541c27c86718c.tar.xz linux-1fe5e9932156f6122c3b1ff6ba7541c27c86718c.zip | |
rbd: create rbd_refresh_helper()
Create a simple helper that handles the common case of calling
__rbd_refresh_header() while holding the ctl_mutex.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/block/rbd.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index de981ac72362..9917943a3572 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -240,7 +240,7 @@ static void rbd_put_dev(struct rbd_device *rbd_dev) put_device(&rbd_dev->dev); } -static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); static int rbd_open(struct block_device *bdev, fmode_t mode) { @@ -1225,9 +1225,7 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) dout("rbd_watch_cb %s notify_id=%llu opcode=%u\n", rbd_dev->header_name, (unsigned long long) notify_id, (unsigned int) opcode); - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(rbd_dev, &hver); - mutex_unlock(&ctl_mutex); + rc = rbd_refresh_header(rbd_dev, &hver); if (rc) pr_warning(RBD_DRV_NAME "%d got notification but failed to " " update snaps: %d\n", rbd_dev->major, rc); @@ -1751,6 +1749,17 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) return ret; } +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) +{ + int ret; + + mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); + ret = __rbd_refresh_header(rbd_dev, hver); + mutex_unlock(&ctl_mutex); + + return ret; +} + static int rbd_init_disk(struct rbd_device *rbd_dev) { struct gendisk *disk; @@ -1904,9 +1913,7 @@ static ssize_t rbd_image_refresh(struct device *dev, struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); int ret; - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - ret = __rbd_refresh_header(rbd_dev, NULL); - mutex_unlock(&ctl_mutex); + ret = rbd_refresh_header(rbd_dev, NULL); return ret < 0 ? ret : size; } @@ -2196,9 +2203,7 @@ static int rbd_init_watch_dev(struct rbd_device *rbd_dev) do { ret = rbd_req_sync_watch(rbd_dev); if (ret == -ERANGE) { - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(rbd_dev, NULL); - mutex_unlock(&ctl_mutex); + rc = rbd_refresh_header(rbd_dev, NULL); if (rc < 0) return rc; } |