diff options
| -rw-r--r-- | fs/btrfs/volumes.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index b4660c413c73..558f46c6bd6f 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -448,6 +448,14 @@ static void pending_bios_fn(struct btrfs_work *work) run_scheduled_bios(device); } +/* + * Add new device to list of registered devices + * + * Returns: + * 1 - first time device is seen + * 0 - device already known + * < 0 - error + */ static noinline int device_list_add(const char *path, struct btrfs_super_block *disk_super, u64 devid, struct btrfs_fs_devices **fs_devices_ret) @@ -455,6 +463,7 @@ static noinline int device_list_add(const char *path, struct btrfs_device *device; struct btrfs_fs_devices *fs_devices; struct rcu_string *name; + int ret = 0; u64 found_transid = btrfs_super_generation(disk_super); fs_devices = find_fsid(disk_super->fsid); @@ -495,6 +504,7 @@ static noinline int device_list_add(const char *path, fs_devices->num_devices++; mutex_unlock(&fs_devices->device_list_mutex); + ret = 1; device->fs_devices = fs_devices; } else if (!device->name || strcmp(device->name->str, path)) { name = rcu_string_strdup(path, GFP_NOFS); @@ -513,7 +523,8 @@ static noinline int device_list_add(const char *path, fs_devices->latest_trans = found_transid; } *fs_devices_ret = fs_devices; - return 0; + + return ret; } static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig) @@ -910,17 +921,19 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, transid = btrfs_super_generation(disk_super); total_devices = btrfs_super_num_devices(disk_super); - if (disk_super->label[0]) { - if (disk_super->label[BTRFS_LABEL_SIZE - 1]) - disk_super->label[BTRFS_LABEL_SIZE - 1] = '\0'; - printk(KERN_INFO "BTRFS: device label %s ", disk_super->label); - } else { - printk(KERN_INFO "BTRFS: device fsid %pU ", disk_super->fsid); - } - - printk(KERN_CONT "devid %llu transid %llu %s\n", devid, transid, path); - ret = device_list_add(path, disk_super, devid, fs_devices_ret); + if (ret > 0) { + if (disk_super->label[0]) { + if (disk_super->label[BTRFS_LABEL_SIZE - 1]) + disk_super->label[BTRFS_LABEL_SIZE - 1] = '\0'; + printk(KERN_INFO "BTRFS: device label %s ", disk_super->label); + } else { + printk(KERN_INFO "BTRFS: device fsid %pU ", disk_super->fsid); + } + + printk(KERN_CONT "devid %llu transid %llu %s\n", devid, transid, path); + ret = 0; + } if (!ret && fs_devices_ret) (*fs_devices_ret)->total_devices = total_devices; |