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authorJavier González <javier@cnexlabs.com>2018-01-05 14:16:05 +0100
committerJens Axboe <axboe@kernel.dk>2018-01-05 08:50:12 -0700
commitbd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1 (patch)
tree524deb9794c836ff79f304dce7052362e60e4db5 /drivers/lightnvm
parente29c80e6dd70d60de5db305eecf1aecf707b02e8 (diff)
downloadlinux-bd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1.tar.bz2
lightnvm: guarantee target unique name across devs.
Until now, target unique naming is only guaranteed per device. This is ok from a lightnvm perspective, but not from a sysfs one, since groups will collide regardless of the underlying device. Check that names are unique across all lightnvm-capable devices. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c33
1 files changed, 27 insertions, 6 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 5c2d0f3a830b..d5f231c9339e 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -56,6 +56,30 @@ static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
return NULL;
}
+static bool nvm_target_exists(const char *name)
+{
+ struct nvm_dev *dev;
+ struct nvm_target *tgt;
+ bool ret = false;
+
+ down_write(&nvm_lock);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ mutex_lock(&dev->mlock);
+ list_for_each_entry(tgt, &dev->targets, list) {
+ if (!strcmp(name, tgt->disk->disk_name)) {
+ ret = true;
+ mutex_unlock(&dev->mlock);
+ goto out;
+ }
+ }
+ mutex_unlock(&dev->mlock);
+ }
+
+out:
+ up_write(&nvm_lock);
+ return ret;
+}
+
static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end)
{
int i;
@@ -259,14 +283,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
return -EINVAL;
}
- mutex_lock(&dev->mlock);
- t = nvm_find_target(dev, create->tgtname);
- if (t) {
- pr_err("nvm: target name already exists.\n");
- mutex_unlock(&dev->mlock);
+ if (nvm_target_exists(create->tgtname)) {
+ pr_err("nvm: target name already exists (%s)\n",
+ create->tgtname);
return -EINVAL;
}
- mutex_unlock(&dev->mlock);
ret = nvm_reserve_luns(dev, s->lun_begin, s->lun_end);
if (ret)