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| author | Javier González <javier@cnexlabs.com> | 2018-01-05 14:16:05 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-05 08:50:12 -0700 |
| commit | bd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1 (patch) | |
| tree | 524deb9794c836ff79f304dce7052362e60e4db5 /drivers/lightnvm | |
| parent | e29c80e6dd70d60de5db305eecf1aecf707b02e8 (diff) | |
| download | linux-stable-bd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1.tar.gz linux-stable-bd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1.tar.bz2 linux-stable-bd77b23b40370f0f37b6457a8d2a4ed2f2ba22c1.zip | |
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.c | 33 |
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) |