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linux-stable/fs/btrfs
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Anand Jain a26d60dedf btrfs: sysfs: add devinfo/fsid to retrieve actual fsid from the device 
In the case of the seed device, the fsid can be different from the mounted
sprout fsid.  The userland has to read the device superblock to know the
fsid but, that idea fails if the device is missing. So add a sysfs
interface devinfo/<devid>/fsid to show the fsid of the device.

For example:
  $ cd /sys/fs/btrfs/b10b02a5-f9de-4276-b9e8-2bfd09a578a8

  $ cat devinfo/1/fsid
  c44d771f-639d-4df3-99ec-5bc7ad2af93b
  $ cat  devinfo/3/fsid
  b10b02a5-f9de-4276-b9e8-2bfd09a578a8

Though it's related to seeding, the name of the sysfs file is plain fsid as it
matches what blkid says.  A path to the device's fsid will aid scripting.

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>
2022-01-07 14:18:25 +01:00
..
tests btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
acl.c overlayfs update for 5.15 2021-09-02 09:21:27 -07:00
async-thread.c btrfs: fix memory ordering between normal and ordered work functions 2021-11-16 16:50:23 +01:00
async-thread.h
backref.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
backref.h btrfs: remove ignore_offset argument from btrfs_find_all_roots() 2021-08-23 13:19:01 +02:00
block-group.c btrfs: make send work with concurrent block group relocation 2022-01-07 14:18:23 +01:00
block-group.h btrfs: fix deadlock between chunk allocation and chunk btree modifications 2021-10-26 19:08:07 +02:00
block-rsv.c btrfs: reserve extra space for the free space tree 2022-01-07 14:18:25 +01:00
block-rsv.h btrfs: init root block_rsv at init root time 2022-01-03 15:09:48 +01:00
btrfs_inode.h btrfs: only copy dir index keys when logging a directory 2022-01-03 15:09:42 +01:00
check-integrity.c btrfs: check-integrity: stop storing the block device name in btrfsic_dev_state 2021-10-26 19:08:07 +02:00
check-integrity.h
compression.c btrfs: set BTRFS_FS_STATE_NO_CSUMS if we fail to load the csum root 2022-01-03 15:09:49 +01:00
compression.h btrfs: determine stripe boundary at bio allocation time in btrfs_submit_compressed_write 2021-10-26 19:08:04 +02:00
ctree.c btrfs: remove stale comment about locking at btrfs_search_slot() 2022-01-07 14:18:23 +01:00
ctree.h btrfs: move btrfs_truncate_inode_items to inode-item.c 2022-01-07 14:18:24 +01:00
delalloc-space.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
delalloc-space.h
delayed-inode.c btrfs: add an inode-item.h 2022-01-07 14:18:23 +01:00
delayed-inode.h
delayed-ref.c btrfs: reserve extra space for the free space tree 2022-01-07 14:18:25 +01:00
delayed-ref.h btrfs: make btrfs_ref::real_root optional 2021-10-26 19:08:06 +02:00
dev-replace.c btrfs: zoned: cache reported zone during mount 2022-01-03 15:09:44 +01:00
dev-replace.h
dir-item.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
discard.c btrfs: fix typos in comments 2021-06-22 14:11:57 +02:00
discard.h
disk-io.c btrfs: make send work with concurrent block group relocation 2022-01-07 14:18:23 +01:00
disk-io.h btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
export.c
export.h
extent-io-tree.h
extent-tree.c btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
extent_io.c btrfs: remove unnecessary @nr_written parameters 2022-01-03 15:09:45 +01:00
extent_io.h btrfs: cleanup for extent_write_locked_range() 2021-10-26 19:08:04 +02:00
extent_map.c btrfs: rename btrfs_bio to btrfs_io_context 2021-10-26 19:08:02 +02:00
extent_map.h
file-item.c btrfs: stop accessing ->csum_root directly 2022-01-03 15:09:49 +01:00
file.c btrfs: fix deadlock due to page faults during direct IO reads and writes 2021-11-09 13:46:07 +01:00
free-space-cache.c btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
free-space-cache.h btrfs: change name and type of private member of btrfs_free_space_ctl 2022-01-03 15:09:50 +01:00
free-space-tree.c btrfs: track the csum, extent, and free space trees in a rb tree 2022-01-03 15:09:50 +01:00
free-space-tree.h
inode-item.c btrfs: make should_throttle loop local in btrfs_truncate_inode_items 2022-01-07 14:18:25 +01:00
inode-item.h btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
inode.c btrfs: add inode to truncate control 2022-01-07 14:18:24 +01:00
ioctl.c btrfs: allow device add if balance is paused 2022-01-07 14:18:23 +01:00
Kconfig btrfs: disable build on platforms having page size 256K 2021-06-22 14:11:57 +02:00
locking.c btrfs: fix typos in comments 2021-06-22 14:11:57 +02:00
locking.h btrfs: assert that extent buffers are write locked instead of only locked 2021-10-26 19:08:02 +02:00
lzo.c for-5.16-rc2-tag 2021-11-26 11:24:32 -08:00
Makefile btrfs: initial fsverity support 2021-08-23 13:19:09 +02:00
misc.h btrfs: use correct header for div_u64 in misc.h 2021-09-07 14:29:50 +02:00
ordered-data.c btrfs: zoned: fix double counting of split ordered extent 2021-09-07 14:30:41 +02:00
ordered-data.h btrfs: remove uptodate parameter from btrfs_dec_test_first_ordered_pending 2021-08-23 13:19:02 +02:00
orphan.c
print-tree.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
print-tree.h
props.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
props.h
qgroup.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
qgroup.h btrfs: fix lock inversion problem when doing qgroup extent tracing 2021-07-22 15:50:07 +02:00
raid56.c btrfs: remove btrfs_raid_bio::fs_info member 2021-10-26 19:08:03 +02:00
raid56.h btrfs: remove btrfs_raid_bio::fs_info member 2021-10-26 19:08:03 +02:00
rcu-string.h
reada.c btrfs: rename btrfs_bio to btrfs_io_context 2021-10-26 19:08:02 +02:00
ref-verify.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
ref-verify.h
reflink.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
reflink.h
relocation.c btrfs: add an inode-item.h 2022-01-07 14:18:23 +01:00
root-tree.c btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
scrub.c btrfs: scrub: merge SCRUB_PAGES_PER_RD_BIO and SCRUB_PAGES_PER_WR_BIO 2022-01-07 14:18:25 +01:00
send.c btrfs: make send work with concurrent block group relocation 2022-01-07 14:18:23 +01:00
send.h btrfs: send: prepare for v2 protocol 2021-10-29 12:38:43 +02:00
space-info.c btrfs: don't use the extent_root in flush_space 2022-01-03 15:09:48 +01:00
space-info.h btrfs: change root to fs_info for btrfs_reserve_metadata_bytes 2022-01-03 15:09:45 +01:00
struct-funcs.c btrfs: add special case to setget helpers for 64k pages 2021-08-23 13:18:58 +02:00
subpage.c btrfs: handle page locking in btrfs_page_end_writer_lock with no writers 2021-10-26 19:08:05 +02:00
subpage.h btrfs: rework page locking in __extent_writepage() 2021-10-26 19:08:05 +02:00
super.c btrfs: add a BTRFS_FS_ERROR helper 2021-10-26 19:08:05 +02:00
sysfs.c btrfs: sysfs: add devinfo/fsid to retrieve actual fsid from the device 2022-01-07 14:18:25 +01:00
sysfs.h
transaction.c btrfs: make send work with concurrent block group relocation 2022-01-07 14:18:23 +01:00
transaction.h btrfs: remove trans_handle->root 2022-01-03 15:09:47 +01:00
tree-checker.c btrfs: rename btrfs_item_end_nr to btrfs_item_data_end 2022-01-03 15:09:43 +01:00
tree-checker.h
tree-defrag.c btrfs: remove unnecessary extent root check in btrfs_defrag_leaves 2022-01-03 15:09:48 +01:00
tree-log.c btrfs: do not check -EAGAIN when truncating inodes in the log root 2022-01-07 14:18:25 +01:00
tree-log.h btrfs: change error handling for btrfs_delete_*_in_log 2021-10-26 19:08:05 +02:00
tree-mod-log.c btrfs: fix race when picking most recent mod log operation for an old root 2021-04-20 19:27:17 +02:00
tree-mod-log.h btrfs: add and use helper to get lowest sequence number for the tree mod log 2021-04-19 17:25:17 +02:00
ulist.c
ulist.h
uuid-tree.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
verity.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
volumes.c btrfs: introduce exclusive operation BALANCE_PAUSED state 2022-01-07 14:18:23 +01:00
volumes.h btrfs: use btrfs_get_dev_args_from_path in dev removal ioctls 2021-10-26 19:08:07 +02:00
xattr.c btrfs: drop the _nr from the item helpers 2022-01-03 15:09:43 +01:00
xattr.h
zlib.c Revert "btrfs: compression: drop kmap/kunmap from zlib" 2021-10-29 13:03:05 +02:00
zoned.c btrfs: stop accessing ->extent_root directly 2022-01-03 15:09:49 +01:00
zoned.h btrfs: zoned: cache reported zone during mount 2022-01-03 15:09:44 +01:00
zstd.c lib: zstd: Add kernel-specific API 2021-11-08 16:55:21 -08:00