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| author | Alex Elder <elder@inktank.com> | 2012-07-10 20:30:10 -0500 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-07-30 18:21:45 -0700 |
| commit | 4e891e0af0f0011c90067373c46d7228568ec079 (patch) | |
| tree | 8697591dc252aef8bce4a349c5f254995f8d3677 /drivers/block | |
| parent | 6139919133377652992a5fe134e22abce3e9c25e (diff) | |
| download | linux-4e891e0af0f0011c90067373c46d7228568ec079.tar.gz linux-4e891e0af0f0011c90067373c46d7228568ec079.tar.bz2 linux-4e891e0af0f0011c90067373c46d7228568ec079.zip | |
rbd: have __rbd_add_snap_dev() return a pointer
It's not obvious whether the snapshot pointer whose address is
provided to __rbd_add_snap_dev() will be assigned by that function.
Change it to return the snapshot, or a pointer-coded errno in the
event of a failure.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 30eb01e300a4..aba0d71a0345 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2029,15 +2029,21 @@ static int rbd_register_snap_dev(struct rbd_snap *snap, return ret; } -static int __rbd_add_snap_dev(struct rbd_device *rbd_dev, - int i, const char *name, - struct rbd_snap **snapp) +static struct rbd_snap *__rbd_add_snap_dev(struct rbd_device *rbd_dev, + int i, const char *name) { + struct rbd_snap *snap; int ret; - struct rbd_snap *snap = kzalloc(sizeof(*snap), GFP_KERNEL); + + snap = kzalloc(sizeof (*snap), GFP_KERNEL); if (!snap) - return -ENOMEM; + return ERR_PTR(-ENOMEM); + + ret = -ENOMEM; snap->name = kstrdup(name, GFP_KERNEL); + if (!snap->name) + goto err; + snap->size = rbd_dev->header.snap_sizes[i]; snap->id = rbd_dev->header.snapc->snaps[i]; if (device_is_registered(&rbd_dev->dev)) { @@ -2045,12 +2051,14 @@ static int __rbd_add_snap_dev(struct rbd_device *rbd_dev, if (ret < 0) goto err; } - *snapp = snap; - return 0; + + return snap; + err: kfree(snap->name); kfree(snap); - return ret; + + return ERR_PTR(ret); } /* @@ -2083,7 +2091,6 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) const char *name, *first_name; int i = rbd_dev->header.total_snaps; struct rbd_snap *snap, *old_snap = NULL; - int ret; struct list_head *p, *n; first_name = rbd_dev->header.snap_names; @@ -2126,9 +2133,9 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) if (cur_id >= old_snap->id) break; /* a new snapshot */ - ret = __rbd_add_snap_dev(rbd_dev, i - 1, name, &snap); - if (ret < 0) - return ret; + snap = __rbd_add_snap_dev(rbd_dev, i - 1, name); + if (IS_ERR(snap)) + return PTR_ERR(snap); /* note that we add it backward so using n and not p */ list_add(&snap->node, n); @@ -2142,9 +2149,9 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) WARN_ON(1); return -EINVAL; } - ret = __rbd_add_snap_dev(rbd_dev, i - 1, name, &snap); - if (ret < 0) - return ret; + snap = __rbd_add_snap_dev(rbd_dev, i - 1, name); + if (IS_ERR(snap)) + return PTR_ERR(snap); list_add(&snap->node, &rbd_dev->snaps); } |