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Anand Jain 96c2e067ed btrfs: skip devices without magic signature when mounting 
Many things can happen after the device is scanned and before the device
is mounted.  One such thing is losing the BTRFS_MAGIC on the device.
If it happens we still won't free that device from the memory and cause
the userland confusion.

For example: As the BTRFS_IOC_DEV_INFO still carries the device path
which does not have the BTRFS_MAGIC, 'btrfs fi show' still lists
device which does not belong to the filesystem anymore:

  $ mkfs.btrfs -fq -draid1 -mraid1 /dev/sda /dev/sdb
  $ wipefs -a /dev/sdb
  # /dev/sdb does not contain magic signature
  $ mount -o degraded /dev/sda /btrfs
  $ btrfs fi show -m
  Label: none  uuid: 470ec6fb-646b-4464-b3cb-df1b26c527bd
	  Total devices 2 FS bytes used 128.00KiB
	  devid    1 size 3.00GiB used 571.19MiB path /dev/sda
	  devid    2 size 3.00GiB used 571.19MiB path /dev/sdb

We need to distinguish the missing signature and invalid superblock, so
add a specific error code ENODATA for that. This also fixes failure of
fstest btrfs/198.

CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2020-10-07 12:17:59 +02:00
..
9p
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
adfs
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
affs
affs: fix basic permission bits to actually work
2020-08-31 12:20:31 +02:00
afs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
autofs
autofs: use __kernel_write() for the autofs pipe writing
2020-09-29 17:18:34 -07:00
befs
block: move struct block_device to blk_types.h
2020-06-24 09:16:02 -06:00
bfs
…
btrfs
btrfs: skip devices without magic signature when mounting
2020-10-07 12:17:59 +02:00
cachefiles
cachefiles: switch to kernel_write
2020-07-08 08:27:56 +02:00
ceph
We have an inode number handling change, prompted by s390x which is
2020-08-28 10:33:04 -07:00
cifs
cifs: fix DFS mount with cifsacl/modefromsid
2020-09-06 23:59:53 -05:00
coda
…
configfs
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
cramfs
…
crypto
mm, treewide: rename kzfree() to kfree_sensitive()
2020-08-07 11:33:22 -07:00
debugfs
debugfs: Fix module state check condition
2020-09-04 18:12:52 +02:00
devpts
…
dlm
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ecryptfs
mm, treewide: rename kzfree() to kfree_sensitive()
2020-08-07 11:33:22 -07:00
efivarfs
efi/efivars: Expose RT service availability via efivars abstraction
2020-07-09 10:14:29 +03:00
efs
block: move struct block_device to blk_types.h
2020-06-24 09:16:02 -06:00
erofs
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
exfat
exfat: retain 'VolumeFlags' properly
2020-08-12 08:31:13 +09:00
exportfs
…
ext2
ext2: don't update mtime on COW faults
2020-09-05 10:00:05 -07:00
ext4
\n
2020-08-28 10:57:14 -07:00
f2fs
f2fs: Return EOF on unaligned end of file DIO read
2020-09-08 20:31:33 -07:00
fat
fat: fix fat_ra_init() for data clusters == 0
2020-08-12 10:58:01 -07:00
freevxfs
…
fscache
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-06-03 16:27:18 -07:00
fuse
fuse: fix the ->direct_IO() treatment of iov_iter
2020-09-17 17:26:56 -04:00
gfs2
Fix memory leak on filesystem withdraw
2020-08-28 10:41:00 -07:00
hfs
block: move block-related definitions out of fs.h
2020-06-24 09:16:02 -06:00
hfsplus
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
hostfs
…
hpfs
hpfs: fix warning due to superfluous semicolon
2020-06-06 10:08:17 -07:00
hugetlbfs
hugetlbfs: prevent filesystem stacking of hugetlbfs
2020-08-12 10:57:56 -07:00
iomap
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
isofs
Remove uninitialized_var() macro for v5.9-rc1
2020-08-04 13:49:43 -07:00
jbd2
jbd2: clean up checksum verification in do_one_pass()
2020-08-19 12:04:35 -04:00
jffs2
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
jfs
block: move struct block_device to blk_types.h
2020-06-24 09:16:02 -06:00
kernfs
fsnotify: pass dir and inode arguments to fsnotify()
2020-07-27 23:15:48 +02:00
lockd
…
minix
fs/minix: remove expected error message in block_to_path()
2020-08-12 10:58:00 -07:00
nfs
pNFS/flexfiles: Be consistent about mirror index types
2020-09-18 09:25:33 -04:00
nfs_common
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
nfsd
Fixes:
2020-08-25 18:01:36 -07:00
nilfs2
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
nls
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
notify
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ntfs
ntfs: fix ntfs_test_inode and ntfs_init_locked_inode function type
2020-08-07 11:33:21 -07:00
ocfs2
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
omfs
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
openpromfs
…
orangefs
orangefs: remove unnecessary assignment to variable ret
2020-08-04 15:01:58 -04:00
overlayfs
Remove uninitialized_var() macro for v5.9-rc1
2020-08-04 13:49:43 -07:00
proc
mm, oom: make the calculation of oom badness more accurate
2020-08-12 10:57:56 -07:00
pstore
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
qnx4
…
qnx6
fs: convert mpage_readpages to mpage_readahead
2020-06-02 10:59:07 -07:00
quota
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ramfs
…
reiserfs
\n
2020-08-06 19:28:26 -07:00
romfs
romfs: fix uninitialized memory leak in romfs_dev_read()
2020-08-21 09:52:53 -07:00
squashfs
squashfs: avoid bio_alloc() failure with 1Mbyte blocks
2020-08-21 09:52:53 -07:00
sysfs
RDMA 5.8 merge window pull request
2020-06-05 14:05:57 -07:00
sysv
…
tracefs
…
ubifs
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
udf
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ufs
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
unicode
…
vboxsf
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-09-22 15:08:41 -07:00
verity
fs-verity: use smp_load_acquire() for ->i_verity_info
2020-07-21 16:02:41 -07:00
xfs
Fixes (2) for 5.9:
2020-09-05 10:04:53 -07:00
zonefs
zonefs: add zone-capacity support
2020-08-11 17:42:24 +09:00
aio.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
anon_inodes.c
…
attr.c
…
bad_inode.c
fs: move the fiemap definitions out of fs.h
2020-06-03 23:16:55 -04:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-07 13:29:39 -07:00
binfmt_elf.c
kill elf_fpxregs_t
2020-07-27 14:29:23 -04:00
binfmt_em86.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-08-24 08:49:13 +10:00
binfmt_misc.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
binfmt_script.c
Merge branch 'akpm' (patches from Andrew)
2020-06-04 19:18:29 -07:00
block_dev.c
for-5.9/io_uring-20200802
2020-08-03 13:01:22 -07:00
buffer.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
char_dev.c
…
compat_binfmt_elf.c
Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK
2020-06-05 13:45:21 -07:00
compat.c
…
coredump.c
coredump: add %f for executable filename
2020-08-12 10:58:01 -07:00
d_path.c
…
dax.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
dcache.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
dcookies.c
…
direct-io.c
fs: remove no longer used dio_end_io()
2020-10-07 12:17:59 +02:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
ep_create_wakeup_source(): dentry name can change under you...
2020-09-24 19:41:58 -04:00
exec.c
mm/gup: remove task_struct pointer for all gup code
2020-08-12 10:58:04 -07:00
fcntl.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fhandle.c
…
file_table.c
Revert "fs: Do not check if there is a fsnotify watcher on pseudo inodes"
2020-06-29 09:40:55 -07:00
file.c
Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-07 09:40:34 -07:00
filesystems.c
…
fs_context.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fs_parser.c
…
fs_pin.c
…
fs_struct.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
fs_types.c
…
fs-writeback.c
fs/fs-writeback.c: adjust dirtytime_interval_handler definition to match prototype
2020-09-19 13:13:39 -07:00
fsopen.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
init.c
init: add an init_dup helper
2020-08-04 21:02:38 -04:00
inode.c
AFS Changes
2020-06-05 16:26:36 -07:00
internal.h
Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-07 09:40:34 -07:00
io_uring.c
io_uring-5.9-2020-10-02
2020-10-02 14:38:10 -07:00
io-wq.c
io-wq: fix hang after cancelling pending hashed work
2020-08-23 11:38:50 -06:00
io-wq.h
io_uring/io-wq: move RLIMIT_FSIZE to io-wq
2020-07-24 13:00:44 -06:00
ioctl.c
fs: remove ksys_ioctl
2020-07-31 08:16:01 +02:00
Kconfig
tmpfs: support 64-bit inums per-sb
2020-08-07 11:33:24 -07:00
Kconfig.binfmt
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
libfs.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
locks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
Makefile
init: add an init_mount helper
2020-07-31 08:17:51 +02:00
mbcache.c
…
mount.h
…
mpage.c
fs: convert mpage_readpages to mpage_readahead
2020-06-02 10:59:07 -07:00
namei.c
exec: restore EACCES of S_ISDIR execve()
2020-08-14 19:56:56 -07:00
namespace.c
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-07 21:03:25 -07:00
no-block.c
…
nsfs.c
…
open.c
exec: move S_ISREG() check earlier
2020-08-12 10:58:01 -07:00
pipe.c
pipe: remove pipe_wait() and fix wakeup race with splice
2020-10-01 19:14:36 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
vfs: clean up posix_acl_permission() logic aroudn MAY_NOT_BLOCK
2020-06-08 11:04:19 -07:00
proc_namespace.c
Merge branch 'proc-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-06-04 13:54:34 -07:00
read_write.c
autofs: use __kernel_write() for the autofs pipe writing
2020-09-29 17:18:34 -07:00
readdir.c
fs: remove ksys_getdents64
2020-07-31 08:16:00 +02:00
select.c
pselect6() and friends: take handling the combined 6th/7th args into helper
2020-05-29 19:10:42 -04:00
seq_file.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
signalfd.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
splice.c
pipe: remove pipe_wait() and fix wakeup race with splice
2020-10-01 19:14:36 -07:00
stack.c
…
stat.c
New code for 5.8:
2020-06-02 19:45:12 -07:00
statfs.c
…
super.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-06-10 16:09:11 -07:00
sync.c
overlayfs update for 5.8
2020-06-09 15:40:50 -07:00
timerfd.c
…
userfaultfd.c
A set of locking fixes and updates:
2020-08-10 19:07:44 -07:00
utimes.c
fs: expose utimes_common
2020-07-31 08:16:01 +02:00
xattr.c
xattr: add a function to check if a namespace is supported
2020-07-13 17:27:03 -04:00