提交 60999ca4 编写于 作者: D David Sterba 提交者: Chris Mason

btrfs: make device scan less noisy

Print the message only when the device is seen for the first time.
Signed-off-by: NDavid Sterba <dsterba@suse.cz>
Signed-off-by: NChris Mason <clm@fb.com>
上级 ed55b6ac
......@@ -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;
......
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