Print the message only when the device is seen for the first time.
Signed-off-by: David Sterba <[email protected]>
---
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 bab0b84d8f80..d3694f347afb 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -447,6 +447,14 @@ 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)
@@ -454,6 +462,7 @@ 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);
@@ -494,6 +503,7 @@ 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);
@@ -512,7 +522,8 @@ 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)
@@ -909,17 +920,19 @@ 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;
--
1.7.9
--
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