diff options
Diffstat (limited to 'drivers/md/bcache/sysfs.c')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index dddb8d4048ce..d62e28643109 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -16,6 +16,8 @@ #include <linux/sort.h> #include <linux/sched/clock.h> +extern bool bcache_is_reboot; + /* Default is 0 ("writethrough") */ static const char * const bch_cache_modes[] = { "writethrough", @@ -267,6 +269,10 @@ STORE(__cached_dev) struct cache_set *c; struct kobj_uevent_env *env; + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + #define d_strtoul(var) sysfs_strtoul(var, dc->var) #define d_strtoul_nonzero(var) sysfs_strtoul_clamp(var, dc->var, 1, INT_MAX) #define d_strtoi_h(var) sysfs_hatoi(var, dc->var) @@ -407,6 +413,10 @@ STORE(bch_cached_dev) struct cached_dev *dc = container_of(kobj, struct cached_dev, disk.kobj); + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + mutex_lock(&bch_register_lock); size = __cached_dev_store(kobj, attr, buf, size); @@ -510,6 +520,10 @@ STORE(__bch_flash_dev) kobj); struct uuid_entry *u = &d->c->uuids[d->id]; + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + sysfs_strtoul(data_csum, d->data_csum); if (attr == &sysfs_size) { @@ -745,6 +759,10 @@ STORE(__bch_cache_set) struct cache_set *c = container_of(kobj, struct cache_set, kobj); ssize_t v; + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + if (attr == &sysfs_unregister) bch_cache_set_unregister(c); @@ -864,6 +882,10 @@ STORE(bch_cache_set_internal) { struct cache_set *c = container_of(kobj, struct cache_set, internal); + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + return bch_cache_set_store(&c->kobj, attr, buf, size); } @@ -1049,6 +1071,10 @@ STORE(__bch_cache) struct cache *ca = container_of(kobj, struct cache, kobj); ssize_t v; + /* no user space access if system is rebooting */ + if (bcache_is_reboot) + return -EBUSY; + if (attr == &sysfs_discard) { bool v = strtoul_or_return(buf); |