Commit 78fa1770 authored by Zhao Lei's avatar Zhao Lei Committed by Chris Mason

btrfs: Show detail information when mount failed on missing devices

When mount failed because missing device, we can see following
dmesg:
 [ 1060.267743] BTRFS: too many missing devices, writeable mount is not allowed
 [ 1060.273158] BTRFS: open_ctree failed

This patch add missing_device_number and tolerated_missing_device_number
to above output, to let user know what really happened, and helps
bug-report and debug.

dmesg after patch:
 [  127.050367] BTRFS: missing devices(1) exceeds the limit(0), writeable mount is not allowed
 [  127.056099] BTRFS: open_ctree failed

Changelog v1->v2:
1: Changed to more clear description, suggested-by:
   Anand Jain <anand.jain@oracle.com>
Suggested-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent a323e813
...@@ -2950,8 +2950,9 @@ int open_ctree(struct super_block *sb, ...@@ -2950,8 +2950,9 @@ int open_ctree(struct super_block *sb,
if (fs_info->fs_devices->missing_devices > if (fs_info->fs_devices->missing_devices >
fs_info->num_tolerated_disk_barrier_failures && fs_info->num_tolerated_disk_barrier_failures &&
!(sb->s_flags & MS_RDONLY)) { !(sb->s_flags & MS_RDONLY)) {
printk(KERN_WARNING "BTRFS: " pr_warn("BTRFS: missing devices(%llu) exceeds the limit(%d), writeable mount is not allowed\n",
"too many missing devices, writeable mount is not allowed\n"); fs_info->fs_devices->missing_devices,
fs_info->num_tolerated_disk_barrier_failures);
goto fail_sysfs; goto fail_sysfs;
} }
......
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