From dc79b113d6db48ee6ee7decf0216feee48757f01 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Thu, 25 Oct 2012 23:34:41 -0500 Subject: [PATCH] rbd: have rbd_add_parse_args() return error Change the interface to rbd_add_parse_args() so it returns an error code rather than a pointer. Return the ceph_options result via a pointer whose address is passed as an argument. Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- drivers/block/rbd.c | 37 ++++++++++++++++++++----------------- 1 file changed, 20 insertions(+), 17 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 338cfadad63f..ab6e6d8364ef 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2841,30 +2841,31 @@ 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, - struct rbd_options **opts) +static int rbd_add_parse_args(struct rbd_device *rbd_dev, + const char *buf, + struct ceph_options **ceph_opts, + struct rbd_options **opts) { size_t len; const char *mon_addrs; size_t mon_addrs_size; char *options; - struct ceph_options *err_ptr = ERR_PTR(-EINVAL); - struct ceph_options *ceph_opts; struct rbd_options *rbd_opts = NULL; + int ret; /* The first four tokens are required */ len = next_token(&buf); if (!len) - return err_ptr; /* Missing monitor address(es) */ + return -EINVAL; /* Missing monitor address(es) */ mon_addrs = buf; mon_addrs_size = len + 1; buf += len; + ret = -EINVAL; options = dup_token(&buf, NULL); if (!options) - goto out_mem; + return -ENOMEM; if (!*options) goto out_err; /* Missing options */ @@ -2889,7 +2890,7 @@ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev, buf = RBD_SNAP_HEAD_NAME; /* No snapshot supplied */ len = sizeof (RBD_SNAP_HEAD_NAME) - 1; } else if (len > RBD_MAX_SNAP_NAME_LEN) { - err_ptr = ERR_PTR(-ENAMETOOLONG); + ret = -ENAMETOOLONG; goto out_err; } rbd_dev->snap_name = kmalloc(len + 1, GFP_KERNEL); @@ -2906,15 +2907,19 @@ static struct ceph_options *rbd_add_parse_args(struct rbd_device *rbd_dev, rbd_opts->read_only = RBD_READ_ONLY_DEFAULT; - ceph_opts = ceph_parse_options(options, mon_addrs, + *ceph_opts = ceph_parse_options(options, mon_addrs, mon_addrs + mon_addrs_size - 1, parse_rbd_opts_token, rbd_opts); kfree(options); + if (IS_ERR(*ceph_opts)) { + ret = PTR_ERR(*ceph_opts); + goto out_err; + } *opts = rbd_opts; - return ceph_opts; + return 0; out_mem: - err_ptr = ERR_PTR(-ENOMEM); + ret = -ENOMEM; out_err: kfree(rbd_dev->image_name); rbd_dev->image_name = NULL; @@ -2923,7 +2928,7 @@ out_err: rbd_dev->pool_name = NULL; kfree(options); - return err_ptr; + return ret; } /* @@ -3131,7 +3136,7 @@ static ssize_t rbd_add(struct bus_type *bus, size_t count) { struct rbd_device *rbd_dev = NULL; - struct ceph_options *ceph_opts; + struct ceph_options *ceph_opts = NULL; struct rbd_options *rbd_opts = NULL; struct ceph_osd_client *osdc; int rc = -ENOMEM; @@ -3150,11 +3155,9 @@ 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, &rbd_opts); - if (IS_ERR(ceph_opts)) { - rc = PTR_ERR(ceph_opts); + rc = rbd_add_parse_args(rbd_dev, buf, &ceph_opts, &rbd_opts); + if (rc < 0) goto err_out_mem; - } rbd_dev->mapping.read_only = rbd_opts->read_only; rc = rbd_get_client(rbd_dev, ceph_opts); -- 2.30.2