Message ID | 508B1653.7000709@inktank.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Reviewed-by: Josh Durgin <josh.durgin@inktank.com> On 10/26/2012 04:01 PM, Alex Elder wrote: > The snapshot name returned by rbd_add_parse_args() just gets saved > in the rbd_dev eventually. So just do that inside that function and > do away with the snap_name argument, both in rbd_add_parse_args() > and rbd_dev_set_mapping(). > > Signed-off-by: Alex Elder <elder@inktank.com> > --- > drivers/block/rbd.c | 23 ++++++++++------------- > 1 file changed, 10 insertions(+), 13 deletions(-) > > diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c > index f900f3b..948a084 100644 > --- a/drivers/block/rbd.c > +++ b/drivers/block/rbd.c > @@ -665,23 +665,22 @@ static int snap_by_name(struct rbd_device > *rbd_dev, const char *snap_name) > return -ENOENT; > } > > -static int rbd_dev_set_mapping(struct rbd_device *rbd_dev, char *snap_name) > +static int rbd_dev_set_mapping(struct rbd_device *rbd_dev) > { > int ret; > > - if (!memcmp(snap_name, RBD_SNAP_HEAD_NAME, > + if (!memcmp(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME, > sizeof (RBD_SNAP_HEAD_NAME))) { > rbd_dev->snap_id = CEPH_NOSNAP; > rbd_dev->mapping.size = rbd_dev->header.image_size; > rbd_dev->mapping.features = rbd_dev->header.features; > ret = 0; > } else { > - ret = snap_by_name(rbd_dev, snap_name); > + ret = snap_by_name(rbd_dev, rbd_dev->snap_name); > if (ret < 0) > goto done; > rbd_dev->mapping.read_only = true; > } > - rbd_dev->snap_name = snap_name; > rbd_dev->exists = true; > done: > return ret; > @@ -2843,8 +2842,7 @@ static inline char *dup_token(const char **buf, > size_t *lenp) > * Note: rbd_dev is assumed to have been initially zero-filled. > */ > static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev, > - const char *buf, > - char **snap_name) > + const char *buf) > { > size_t len; > const char *mon_addrs; > @@ -2893,11 +2891,11 @@ static struct ceph_options > *rbd_add_parse_args(struct rbd_device *rbd_dev, > err_ptr = ERR_PTR(-ENAMETOOLONG); > goto out_err; > } > - *snap_name = kmalloc(len + 1, GFP_KERNEL); > - if (!*snap_name) > + rbd_dev->snap_name = kmalloc(len + 1, GFP_KERNEL); > + if (!rbd_dev->snap_name) > goto out_mem; > - memcpy(*snap_name, buf, len); > - *(*snap_name + len) = '\0'; > + memcpy(rbd_dev->snap_name, buf, len); > + *(rbd_dev->snap_name + len) = '\0'; > > /* Initialize all rbd options to the defaults */ > > @@ -3132,7 +3130,6 @@ static ssize_t rbd_add(struct bus_type *bus, > size_t count) > { > struct rbd_device *rbd_dev = NULL; > - char *snap_name; > struct ceph_options *ceph_opts; > struct ceph_osd_client *osdc; > int rc = -ENOMEM; > @@ -3151,7 +3148,7 @@ static ssize_t rbd_add(struct bus_type *bus, > init_rwsem(&rbd_dev->header_rwsem); > > /* parse add command */ > - ceph_opts = rbd_add_parse_args(rbd_dev, buf, &snap_name); > + ceph_opts = rbd_add_parse_args(rbd_dev, buf); > if (IS_ERR(ceph_opts)) { > rc = PTR_ERR(ceph_opts); > goto err_out_mem; > @@ -3178,7 +3175,7 @@ static ssize_t rbd_add(struct bus_type *bus, > if (rc) > goto err_out_probe; > > - rc = rbd_dev_set_mapping(rbd_dev, snap_name); > + rc = rbd_dev_set_mapping(rbd_dev); > if (rc) > goto err_out_snaps; > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index f900f3b..948a084 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -665,23 +665,22 @@ static int snap_by_name(struct rbd_device *rbd_dev, const char *snap_name) return -ENOENT; } -static int rbd_dev_set_mapping(struct rbd_device *rbd_dev, char *snap_name) +static int rbd_dev_set_mapping(struct rbd_device *rbd_dev) { int ret; - if (!memcmp(snap_name, RBD_SNAP_HEAD_NAME, + if (!memcmp(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME))) { rbd_dev->snap_id = CEPH_NOSNAP; rbd_dev->mapping.size = rbd_dev->header.image_size; rbd_dev->mapping.features = rbd_dev->header.features; ret = 0; } else { - ret = snap_by_name(rbd_dev, snap_name); + ret = snap_by_name(rbd_dev, rbd_dev->snap_name); if (ret < 0) goto done; rbd_dev->mapping.read_only = true; } - rbd_dev->snap_name = snap_name; rbd_dev->exists = true; done:
The snapshot name returned by rbd_add_parse_args() just gets saved in the rbd_dev eventually. So just do that inside that function and do away with the snap_name argument, both in rbd_add_parse_args() and rbd_dev_set_mapping(). Signed-off-by: Alex Elder <elder@inktank.com> --- drivers/block/rbd.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) return ret; @@ -2843,8 +2842,7 @@ static inline char *dup_token(const char **buf, size_t *lenp) * Note: rbd_dev is assumed to have been initially zero-filled. */ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev, - const char *buf, - char **snap_name) + const char *buf) { size_t len; const char *mon_addrs; @@ -2893,11 +2891,11 @@ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev, err_ptr = ERR_PTR(-ENAMETOOLONG); goto out_err; } - *snap_name = kmalloc(len + 1, GFP_KERNEL); - if (!*snap_name) + rbd_dev->snap_name = kmalloc(len + 1, GFP_KERNEL); + if (!rbd_dev->snap_name) goto out_mem; - memcpy(*snap_name, buf, len); - *(*snap_name + len) = '\0'; + memcpy(rbd_dev->snap_name, buf, len); + *(rbd_dev->snap_name + len) = '\0'; /* Initialize all rbd options to the defaults */ @@ -3132,7 +3130,6 @@ static ssize_t rbd_add(struct bus_type *bus, size_t count) { struct rbd_device *rbd_dev = NULL; - char *snap_name; struct ceph_options *ceph_opts; struct ceph_osd_client *osdc; int rc = -ENOMEM; @@ -3151,7 +3148,7 @@ static ssize_t rbd_add(struct bus_type *bus, init_rwsem(&rbd_dev->header_rwsem); /* parse add command */ - ceph_opts = rbd_add_parse_args(rbd_dev, buf, &snap_name); + ceph_opts = rbd_add_parse_args(rbd_dev, buf); if (IS_ERR(ceph_opts)) { rc = PTR_ERR(ceph_opts); goto err_out_mem; @@ -3178,7 +3175,7 @@ static ssize_t rbd_add(struct bus_type *bus, if (rc) goto err_out_probe; - rc = rbd_dev_set_mapping(rbd_dev, snap_name); + rc = rbd_dev_set_mapping(rbd_dev); if (rc) goto err_out_snaps;