From c55024514852930a6a31b6794aad44a56b117d9d Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Thu, 9 Mar 2017 09:34:42 +0800 Subject: [PATCH] btrfs: Enhance message when a device is missing during mount For a missing device, btrfs will just refuse to mount with almost meaningless kernel message like: BTRFS info (device vdb6): disk space caching is enabled BTRFS info (device vdb6): has skinny extents BTRFS error (device vdb6): failed to read the system array: -5 BTRFS error (device vdb6): open_ctree failed This patch will print a new message about the missing device: BTRFS info (device vdb6): disk space caching is enabled BTRFS info (device vdb6): has skinny extents BTRFS warning (device vdb6): devid 2 uuid 80470722-cad2-4b90-b7c3-fee294552f1b is missing BTRFS error (device vdb6): failed to read the system array: -5 BTRFS error (device vdb6): open_ctree failed Signed-off-by: Qu Wenruo Reviewed-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/volumes.c | 24 +++++++++++++++++------- fs/btrfs/volumes.h | 2 ++ 2 files changed, 19 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 2272ac48a8a9..da997eabde3b 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6492,6 +6492,7 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key, if (!map->stripes[i].dev && !btrfs_test_opt(fs_info, DEGRADED)) { free_extent_map(em); + btrfs_report_missing_device(fs_info, devid, uuid); return -EIO; } if (!map->stripes[i].dev) { @@ -6502,8 +6503,7 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key, free_extent_map(em); return -EIO; } - btrfs_warn(fs_info, "devid %llu uuid %pU is missing", - devid, uuid); + btrfs_report_missing_device(fs_info, devid, uuid); } map->stripes[i].dev->in_fs_metadata = 1; } @@ -6620,17 +6620,21 @@ static int read_one_dev(struct btrfs_fs_info *fs_info, device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid); if (!device) { - if (!btrfs_test_opt(fs_info, DEGRADED)) + if (!btrfs_test_opt(fs_info, DEGRADED)) { + btrfs_report_missing_device(fs_info, devid, dev_uuid); return -EIO; + } device = add_missing_dev(fs_devices, devid, dev_uuid); if (!device) return -ENOMEM; - btrfs_warn(fs_info, "devid %llu uuid %pU missing", - devid, dev_uuid); + btrfs_report_missing_device(fs_info, devid, dev_uuid); } else { - if (!device->bdev && !btrfs_test_opt(fs_info, DEGRADED)) - return -EIO; + if (!device->bdev) { + btrfs_report_missing_device(fs_info, devid, dev_uuid); + if (!btrfs_test_opt(fs_info, DEGRADED)) + return -EIO; + } if(!device->bdev && !device->missing) { /* @@ -6796,6 +6800,12 @@ out_short_read: return -EIO; } +void btrfs_report_missing_device(struct btrfs_fs_info *fs_info, u64 devid, + u8 *uuid) +{ + btrfs_warn_rl(fs_info, "devid %llu uuid %pU is missing", devid, uuid); +} + /* * Check if all chunks in the fs are OK for read-write degraded mount * diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 5824cdc0b3fc..e906377ed329 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -544,5 +544,7 @@ void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info); +void btrfs_report_missing_device(struct btrfs_fs_info *fs_info, u64 devid, + u8 *uuid); #endif -- 2.34.1