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3bb17a25bc
linux/fs/btrfs
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Josef Bacik 3bb17a25bc btrfs: add get_tree callback for new mount API 
This is the actual mounting callback for the new mount API.  Implement
this using our current fill super as a guideline, making the appropriate
adjustments for the new mount API.

Our old mount operation had two fs_types, one to handle the actual
opening, and the one that we called to handle the actual opening and
then did the subvol lookup for returning the actual root dentry.  This
is mirrored here, but simply with different behaviors for ->get_tree.
We use the existence of ->s_fs_info to tell which part we're in.  The
initial call allocates the fs_info, then call mount_fc() with a
duplicated fc to do the actual open_ctree part.  Then we take that
vfsmount and use it to look up our subvolume that we're mounting and
return that as our s_root.  This idea was taken from Christians attempt
to convert us to the new mount API [1].

In btrfs_get_tree_super() the mount device is scanned and opened in one
go under uuid_mutex we expect that all related devices have been already
scanned, either by mount or from the outside. A device forget can be
called on some of the devices as the whole context is not protected but
it's an unlikely event, though it's a minor behaviour change.

References: https://lore.kernel.org/all/20230626-fs-btrfs-mount-api-v1-2-045e9735a00b@kernel.org/
Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add note about device scanning ]
Signed-off-by: David Sterba <dsterba@suse.com>
2023-12-15 20:27:04 +01:00
..
tests btrfs: always set extent_io_tree::inode and drop fs_info 2023-12-15 20:27:02 +01:00
accessors.c
accessors.h btrfs: qgroup: check generation when recording simple quota delta 2023-10-12 16:44:11 +02:00
acl.c
acl.h
async-thread.c btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
async-thread.h btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
backref.c for-6.7-tag 2023-10-30 10:42:06 -10:00
backref.h for-6.7-tag 2023-10-30 10:42:06 -10:00
bio.c btrfs: merge ordered work callbacks in btrfs_work into one 2023-10-12 16:44:10 +02:00
bio.h btrfs: add an ordered_extent pointer to struct btrfs_bio 2023-06-19 13:59:36 +02:00
block-group.c btrfs: remove stripe size local variable from insert_dev_extents() 2023-12-15 20:27:02 +01:00
block-group.h btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
block-rsv.c btrfs: read raid stripe tree from disk 2023-10-12 16:44:09 +02:00
block-rsv.h btrfs: move btrfs_check_trunc_cache_free_space into block-rsv.c 2023-06-19 13:59:24 +02:00
btrfs_inode.h btrfs: open code timespec64 in struct btrfs_inode 2023-10-12 16:44:19 +02:00
compression.c btrfs: use shrinker for compression page pool 2023-12-15 20:27:01 +01:00
compression.h btrfs: use page alloc/free wrappers for compression pages 2023-12-15 20:27:01 +01:00
ctree.c btrfs: make the logic from btrfs_block_can_be_shared() easier to read 2023-12-15 20:27:00 +01:00
ctree.h btrfs: remove unused btrfs_root::type 2023-12-15 20:27:01 +01:00
defrag.c btrfs: remove no longer used EXTENT_MAP_DELALLOC block start value 2023-12-15 20:27:03 +01:00
defrag.h btrfs: move btrfs_defrag_root() to defrag.{c,h} 2023-10-12 16:44:13 +02:00
delalloc-space.c btrfs: fix qgroup_free_reserved_data int overflow 2023-12-06 22:32:46 +01:00
delalloc-space.h
delayed-inode.c btrfs: do not utilize goto to implement delayed inode ref deletion 2023-12-15 20:27:00 +01:00
delayed-inode.h btrfs: remove redundant root argument from btrfs_delayed_update_inode() 2023-10-12 16:44:12 +02:00
delayed-ref.c btrfs: fix qgroup record leaks when using simple quotas 2023-11-09 14:01:59 +01:00
delayed-ref.h btrfs: stop reserving excessive space for block group item insertions 2023-10-12 16:44:16 +02:00
dev-replace.c btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
dev-replace.h
dir-item.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
dir-item.h btrfs: add fscrypt related dependencies to respective headers 2023-10-12 16:44:02 +02:00
discard.c btrfs: unexport btrfs_run_discard_work and make it static 2023-06-19 13:59:25 +02:00
discard.h btrfs: unexport btrfs_run_discard_work and make it static 2023-06-19 13:59:25 +02:00
disk-io.c btrfs: add a NOSPACECACHE mount option flag 2023-12-15 20:27:04 +01:00
disk-io.h btrfs: remove duplicate btrfs_clear_buffer_dirty() prototype from disk-io.h 2023-12-15 20:27:00 +01:00
export.c
export.h
extent_io.c btrfs: allow extent buffer helpers to skip cross-page handling 2023-12-15 20:27:03 +01:00
extent_io.h btrfs: allow extent buffer helpers to skip cross-page handling 2023-12-15 20:27:03 +01:00
extent_map.c btrfs: remove no longer used EXTENT_MAP_DELALLOC block start value 2023-12-15 20:27:03 +01:00
extent_map.h btrfs: remove no longer used EXTENT_MAP_DELALLOC block start value 2023-12-15 20:27:03 +01:00
extent-io-tree.c btrfs: always set extent_io_tree::inode and drop fs_info 2023-12-15 20:27:02 +01:00
extent-io-tree.h btrfs: always set extent_io_tree::inode and drop fs_info 2023-12-15 20:27:02 +01:00
extent-tree.c btrfs: reflow btrfs_free_tree_block 2023-12-15 20:27:03 +01:00
extent-tree.h btrfs: get correct owning_root when dropping snapshot 2023-11-03 16:39:06 +01:00
file-item.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
file-item.h btrfs: scrub: avoid unnecessary csum tree search preparing stripes 2023-08-21 14:54:48 +02:00
file.c btrfs: migrate to use folio private instead of page private 2023-12-15 20:27:01 +01:00
file.h
free-space-cache.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
free-space-cache.h btrfs: move btrfs_check_trunc_cache_free_space into block-rsv.c 2023-06-19 13:59:24 +02:00
free-space-tree.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
free-space-tree.h btrfs: make clear_cache mount option to rebuild FST without disabling it 2023-05-10 14:51:27 +02:00
fs.c
fs.h btrfs: add a NOSPACECACHE mount option flag 2023-12-15 20:27:04 +01:00
inode-item.c btrfs: track owning root in btrfs_ref 2023-10-12 16:44:11 +02:00
inode-item.h btrfs: add fscrypt related dependencies to respective headers 2023-10-12 16:44:02 +02:00
inode.c btrfs: always set extent_io_tree::inode and drop fs_info 2023-12-15 20:27:02 +01:00
ioctl.c for-6.7-rc3-tag 2023-11-28 11:16:04 -08:00
ioctl.h
Kconfig btrfs: check-integrity: remove CONFIG_BTRFS_FS_CHECK_INTEGRITY option 2023-10-12 16:44:05 +02:00
locking.c btrfs: add raid stripe tree definitions 2023-10-12 16:44:09 +02:00
locking.h btrfs: do not block starts waiting on previous transaction commit 2023-09-08 14:10:49 +02:00
lru_cache.c
lru_cache.h btrfs: remove btrfs_lru_cache_is_full() inline function 2023-04-17 18:01:18 +02:00
lzo.c btrfs: use page alloc/free wrappers for compression pages 2023-12-15 20:27:01 +01:00
Makefile btrfs: add support for inserting raid stripe extents 2023-10-12 16:44:09 +02:00
messages.c btrfs: constify fs_info parameter in __btrfs_panic() 2023-12-15 20:27:02 +01:00
messages.h btrfs: constify fs_info parameter in __btrfs_panic() 2023-12-15 20:27:02 +01:00
misc.h minmax: add in_range() macro 2023-08-24 16:20:18 -07:00
ordered-data.c btrfs: fix qgroup_free_reserved_data int overflow 2023-12-06 22:32:46 +01:00
ordered-data.h btrfs: remove unused btrfs_ordered_extent::outstanding_isize 2023-12-15 20:27:01 +01:00
orphan.c
orphan.h
print-tree.c btrfs: new inline ref storing owning subvol of data extents 2023-10-12 16:44:11 +02:00
print-tree.h btrfs: print-tree: pass const extent buffer pointer 2023-06-19 13:59:22 +02:00
props.c btrfs: move btrfs_name_hash to dir-item.h 2023-10-12 16:44:02 +02:00
props.h
qgroup.c btrfs: ensure releasing squota reserve on head refs 2023-12-06 22:32:57 +01:00
qgroup.h btrfs: ensure releasing squota reserve on head refs 2023-12-06 22:32:57 +01:00
raid56.c btrfs: raid56: remove unused btrfs_plug_cb::work 2023-12-15 20:27:01 +01:00
raid56.h btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
raid-stripe-tree.c btrfs: directly return 0 on no error code in btrfs_insert_raid_extent() 2023-11-03 16:38:51 +01:00
raid-stripe-tree.h btrfs: zoned: support RAID0/1/10 on top of raid stripe tree 2023-10-12 16:44:09 +02:00
rcu-string.h
ref-verify.c btrfs: ref-verify: fix memory leaks in btrfs_ref_tree_mod() 2023-11-23 22:27:34 +01:00
ref-verify.h
reflink.c for-6.7-tag 2023-10-30 10:42:06 -10:00
reflink.h
relocation.c for-6.7-tag 2023-10-30 10:42:06 -10:00
relocation.h btrfs: relocation: constify parameters where possible 2023-10-12 16:44:13 +02:00
root-tree.c btrfs: qgroup: add new quota mode for simple quotas 2023-10-12 16:44:10 +02:00
root-tree.h btrfs: drop __must_check annotations 2023-10-12 16:44:04 +02:00
scrub.c btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
scrub.h btrfs: scrub: remove scrub_bio structure 2023-04-17 18:01:24 +02:00
send.c btrfs: send: ensure send_fd is writable 2023-11-24 18:50:53 +01:00
send.h
space-info.c btrfs: adjust overcommit logic when very close to full 2023-10-12 16:44:16 +02:00
space-info.h btrfs: pass a space_info argument to btrfs_reserve_metadata_bytes() 2023-10-12 16:44:05 +02:00
subpage.c btrfs: migrate to use folio private instead of page private 2023-12-15 20:27:01 +01:00
subpage.h btrfs: stop setting PageError in the data I/O path 2023-06-19 13:59:35 +02:00
super.c btrfs: add get_tree callback for new mount API 2023-12-15 20:27:04 +01:00
super.h btrfs: move space cache settings into open_ctree 2023-12-15 20:27:03 +01:00
sysfs.c btrfs: sysfs: show temp_fsid feature 2023-10-12 16:44:18 +02:00
sysfs.h
transaction.c for-6.7-rc5-tag 2023-12-14 11:53:00 -08:00
transaction.h btrfs: free qgroup pertrans reserve on transaction abort 2023-12-06 22:32:49 +01:00
tree-checker.c btrfs: tree-checker: add type and sequence check for inline backrefs 2023-11-15 17:08:09 +01:00
tree-checker.h btrfs: move btrfs_verify_level_key into tree-checker.c 2023-06-19 13:59:25 +02:00
tree-log.c btrfs: remove now unneeded btrfs_redirty_list_add 2023-12-15 20:27:03 +01:00
tree-log.h btrfs: change for_rename argument of btrfs_record_unlink_dir() to bool 2023-06-19 13:59:26 +02:00
tree-mod-log.c btrfs: avoid tree mod log ENOMEM failures when we don't need to log 2023-06-19 13:59:38 +02:00
tree-mod-log.h
ulist.c btrfs: reformat remaining kdoc style comments 2023-10-12 16:44:04 +02:00
ulist.h
uuid-tree.c btrfs: abort transaction on generation mismatch when marking eb as dirty 2023-10-12 16:44:07 +02:00
uuid-tree.h
verity.c btrfs: remove redundant root argument from btrfs_update_inode() 2023-10-12 16:44:12 +02:00
verity.h
volumes.c btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
volumes.h btrfs: use a dedicated data structure for chunk maps 2023-12-15 20:27:02 +01:00
xattr.c for-6.7-tag 2023-10-30 10:42:06 -10:00
xattr.h btrfs: move btrfs_xattr_handlers to .rodata 2023-10-09 16:24:17 +02:00
zlib.c btrfs: use page alloc/free wrappers for compression pages 2023-12-15 20:27:01 +01:00
zoned.c btrfs: add reconfigure callback for fs_context 2023-12-15 20:27:04 +01:00
zoned.h btrfs: add reconfigure callback for fs_context 2023-12-15 20:27:04 +01:00
zstd.c btrfs: use page alloc/free wrappers for compression pages 2023-12-15 20:27:01 +01:00