diff options
author | Alex Elder <elder@inktank.com> | 2012-07-10 02:04:23 (GMT) |
---|---|---|
committer | Sage Weil <sage@inktank.com> | 2012-07-30 16:30:03 (GMT) |
commit | cb8627c76db699e3a085596aa80503fb0973c041 (patch) | |
tree | f9c7006c709a114686500d8601beb02a169e9f0c /drivers/block/rbd.c | |
parent | 849b4260d482f7d4be5565b2044901a25f80e2c6 (diff) | |
download | linux-fsl-qoriq-cb8627c76db699e3a085596aa80503fb0973c041.tar.xz |
rbd: dynamically allocate image header name
There is no need to impose a small limit the length of the header
name recorded for an rbd image in a struct rbd_dev. Remove the
limitation by allocating space for the header name dynamically.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block/rbd.c')
-rw-r--r-- | drivers/block/rbd.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 92867f3..9b676b3 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -55,7 +55,6 @@ #define RBD_MINORS_PER_MAJOR 256 /* max minors per blkdev */ -#define RBD_MAX_MD_NAME_LEN (RBD_MAX_OBJ_NAME_LEN + sizeof(RBD_SUFFIX)) #define RBD_MAX_SNAP_NAME_LEN 32 #define RBD_MAX_OPT_LEN 1024 @@ -164,7 +163,7 @@ struct rbd_device { struct rbd_image_header header; char obj[RBD_MAX_OBJ_NAME_LEN]; /* rbd image name */ int obj_len; - char obj_md_name[RBD_MAX_MD_NAME_LEN]; /* hdr nm. */ + char *obj_md_name; /* hdr nm. */ char *pool_name; int pool_id; @@ -2386,8 +2385,13 @@ static int rbd_add_parse_args(struct rbd_device *rbd_dev, rbd_dev->obj_len = len; - BUILD_BUG_ON(RBD_MAX_MD_NAME_LEN - < RBD_MAX_OBJ_NAME_LEN + sizeof (RBD_SUFFIX)); + /* Create the name of the header object */ + + rbd_dev->obj_md_name = kmalloc(len + sizeof (RBD_SUFFIX), GFP_KERNEL); + if (!rbd_dev->obj_md_name) { + ret = -ENOMEM; + goto out_err; + } sprintf(rbd_dev->obj_md_name, "%s%s", rbd_dev->obj, RBD_SUFFIX); /* @@ -2406,6 +2410,7 @@ static int rbd_add_parse_args(struct rbd_device *rbd_dev, return 0; out_err: + kfree(rbd_dev->obj_md_name); kfree(rbd_dev->pool_name); rbd_dev->pool_name = NULL; @@ -2416,22 +2421,22 @@ static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count) { - struct rbd_device *rbd_dev; + char *options; + struct rbd_device *rbd_dev = NULL; const char *mon_addrs = NULL; size_t mon_addrs_size = 0; - char *options = NULL; struct ceph_osd_client *osdc; int rc = -ENOMEM; if (!try_module_get(THIS_MODULE)) return -ENODEV; - rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); - if (!rbd_dev) - goto err_nomem; options = kmalloc(count, GFP_KERNEL); if (!options) goto err_nomem; + rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); + if (!rbd_dev) + goto err_nomem; /* static rbd_device initialization */ spin_lock_init(&rbd_dev->lock); @@ -2507,11 +2512,14 @@ err_out_blkdev: err_out_client: rbd_put_client(rbd_dev); err_put_id: - kfree(rbd_dev->pool_name); + if (rbd_dev->pool_name) { + kfree(rbd_dev->obj_md_name); + kfree(rbd_dev->pool_name); + } rbd_id_put(rbd_dev); err_nomem: - kfree(options); kfree(rbd_dev); + kfree(options); dout("Error adding device %s\n", buf); module_put(THIS_MODULE); @@ -2556,6 +2564,7 @@ static void rbd_dev_release(struct device *dev) unregister_blkdev(rbd_dev->major, rbd_dev->name); /* done with the id, and with the rbd_dev */ + kfree(rbd_dev->obj_md_name); kfree(rbd_dev->pool_name); rbd_id_put(rbd_dev); kfree(rbd_dev); |