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linux/fs/btrfs
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Johannes Thumshirn 8f32380d3f btrfs: use the page cache for super block reading 
Super-block reading in BTRFS is done using buffer_heads. Buffer_heads
have some drawbacks, like not being able to propagate errors from the
lower layers.

Directly use the page cache for reading the super blocks from disk or
invalidating an on-disk super block. We have to use the page cache so to
avoid races between mkfs and udev. See also 6f60cbd3ae44 ("btrfs: access
superblock via pagecache in scan_one_device").

This patch unwraps the buffer head API and does not change the way the
super block is actually read.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2020-03-23 17:01:39 +01:00
..
tests
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
acl.c
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
async-thread.c
btrfs: add __pure attribute to functions
2019-11-18 12:46:52 +01:00
async-thread.h
btrfs: add __pure attribute to functions
2019-11-18 12:46:52 +01:00
backref.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
backref.h
btrfs: fiemap: preallocate ulists for btrfs_check_shared
2019-07-01 13:34:53 +02:00
block-group.c
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
block-group.h
btrfs: Move and unexport btrfs_rmap_block
2020-01-23 17:24:34 +01:00
block-rsv.c
btrfs: add a comment describing block reserves
2020-03-23 17:01:26 +01:00
block-rsv.h
btrfs: migrate the global_block_rsv helpers to block-rsv.c
2019-07-02 12:30:55 +02:00
btrfs_inode.h
btrfs: introduce per-inode file extent tree
2020-03-23 17:01:24 +01:00
check-integrity.c
btrfs: remove superfluous BUG_ON() in integrity checks
2020-01-20 16:40:52 +01:00
check-integrity.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
compression.c
btrfs: use larger zlib buffer for s390 hardware compression
2020-01-31 10:30:40 -08:00
compression.h
btrfs: compression: remove ops pointer from workspace_manager
2019-11-18 12:46:59 +01:00
ctree.c
btrfs: move root node locking helpers to locking.c
2020-03-23 17:01:33 +01:00
ctree.h
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
delalloc-space.c
btrfs: add a comment describing delalloc space reservation
2020-03-23 17:01:27 +01:00
delalloc-space.h
btrfs: migrate the delalloc space stuff to it's own home
2019-07-04 17:26:17 +02:00
delayed-inode.c
btrfs: add wrapper for transaction abort predicate
2020-03-23 17:01:34 +01:00
delayed-inode.h
Btrfs: delayed-inode: use rb_first_cached for ins_root and del_root
2018-10-15 17:23:33 +02:00
delayed-ref.c
Btrfs: fix race between adding and putting tree mod seq elements and nodes
2020-01-31 14:01:20 +01:00
delayed-ref.h
btrfs: migrate the delayed refs rsv code
2019-07-04 17:26:17 +02:00
dev-replace.c
btrfs: sysfs, rename device_link add/remove functions
2020-03-23 17:01:35 +01:00
dev-replace.h
btrfs: add __pure attribute to functions
2019-11-18 12:46:52 +01:00
dir-item.c
btrfs: remove unused parameter fs_info from btrfs_extend_item
2019-04-29 19:02:50 +02:00
discard.c
btrfs: add correction to handle -1 edge case in async discard
2020-01-20 16:41:01 +01:00
discard.h
btrfs: have multiple discard lists
2020-01-20 16:41:00 +01:00
disk-io.c
btrfs: use the page cache for super block reading
2020-03-23 17:01:39 +01:00
disk-io.h
btrfs: use the page cache for super block reading
2020-03-23 17:01:39 +01:00
export.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
export.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
extent_io.c
Btrfs: avoid unnecessary splits when setting bits on an extent io tree
2020-03-23 17:01:38 +01:00
extent_io.h
btrfs: sink argument tree to extent_read_full_page
2020-03-23 17:01:35 +01:00
extent_map.c
Btrfs: fix race between using extent maps and merging them
2020-02-12 17:16:46 +01:00
extent_map.h
btrfs: remove extent_map::bdev
2019-11-18 23:43:44 +01:00
extent-io-tree.h
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
extent-tree.c
btrfs: handle logged extent failure properly
2020-03-23 17:01:38 +01:00
file-item.c
btrfs: introduce per-inode file extent tree
2020-03-23 17:01:24 +01:00
file.c
btrfs: drop argument tree from btrfs_lock_and_flush_ordered_range
2020-03-23 17:01:34 +01:00
free-space-cache.c
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
free-space-cache.h
btrfs: have multiple discard lists
2020-01-20 16:41:00 +01:00
free-space-tree.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
free-space-tree.h
btrfs: rename btrfs_block_group_cache
2019-11-18 17:51:51 +01:00
inode-item.c
btrfs: Make btrfs_find_name_in_ext_backref return struct btrfs_inode_extref
2019-09-09 14:59:16 +02:00
inode-map.c
btrfs: keep track of which extents have been discarded
2020-01-20 16:40:57 +01:00
inode-map.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
inode.c
btrfs: sink argument tree to extent_read_full_page
2020-03-23 17:01:35 +01:00
ioctl.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
Kconfig
btrfs: add Kconfig dependency for BLAKE2B
2019-12-09 17:56:06 +01:00
locking.c
btrfs: move root node locking helpers to locking.c
2020-03-23 17:01:33 +01:00
locking.h
btrfs: move btrfs_unlock_up_safe to other locking functions
2019-11-18 12:46:49 +01:00
lzo.c
btrfs: compression: inline free_workspace
2019-11-18 12:46:59 +01:00
Makefile
btrfs: add the beginning of async discard, discard workqueue
2020-01-20 16:40:57 +01:00
misc.h
btrfs: add 64bit safe helper for power of two checks
2019-11-18 12:46:50 +01:00
ordered-data.c
btrfs: drop argument tree from btrfs_lock_and_flush_ordered_range
2020-03-23 17:01:34 +01:00
ordered-data.h
btrfs: drop argument tree from btrfs_lock_and_flush_ordered_range
2020-03-23 17:01:34 +01:00
orphan.c
btrfs: replace GPL boilerplate by SPDX -- sources
2018-04-12 16:29:51 +02:00
print-tree.c
btrfs: Remove unneeded semicolon
2020-01-20 16:40:55 +01:00
print-tree.h
btrfs: print-tree: debugging output enhancement
2018-04-20 19:18:16 +02:00
props.c
btrfs: props: remove unnecessary hash_init()
2019-11-18 12:46:55 +01:00
props.h
btrfs: delete unused function btrfs_set_prop_trans
2019-04-29 19:02:54 +02:00
qgroup.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
qgroup.h
btrfs: destroy qgroup extent records on transaction abort
2020-02-19 00:35:54 +01:00
raid56.c
btrfs: remove pointless local variable in lock_stripe_add()
2019-11-18 12:47:00 +01:00
raid56.h
btrfs: constify map parameter for nr_parity_stripes and nr_data_stripes
2019-07-01 13:34:58 +02:00
rcu-string.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
reada.c
btrfs: rename btrfs_block_group_cache
2019-11-18 17:51:51 +01:00
ref-verify.c
btrfs: ref-verify: fix memory leaks
2020-02-12 17:16:31 +01:00
ref-verify.h
btrfs: ref-verify: Use btrfs_ref to refactor btrfs_ref_tree_mod()
2019-04-29 19:02:49 +02:00
relocation.c
btrfs: relocation: Remove is_cowonly_root()
2020-03-23 17:01:38 +01:00
root-tree.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
scrub.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
send.c
btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root
2020-03-23 17:01:33 +01:00
send.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
space-info.c
btrfs: describe the space reservation system in general
2020-03-23 17:01:27 +01:00
space-info.h
btrfs: take overcommit into account in inc_block_group_ro
2020-01-31 14:02:01 +01:00
struct-funcs.c
btrfs: tie extent buffer and it's token together
2019-09-09 14:59:16 +02:00
super.c
btrfs: add wrapper for transaction abort predicate
2020-03-23 17:01:34 +01:00
sysfs.c
btrfs: sysfs, unify handler name of devinfo/missing
2020-03-23 17:01:36 +01:00
sysfs.h
btrfs: sysfs, rename device_link add/remove functions
2020-03-23 17:01:35 +01:00
transaction.c
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
transaction.h
btrfs: switch to per-transaction pinned extents
2020-03-23 17:01:38 +01:00
tree-checker.c
btrfs: tree-checker: Verify location key for DIR_ITEM/DIR_INDEX
2020-01-20 16:40:56 +01:00
tree-checker.h
btrfs: get fs_info from eb in btrfs_check_chunk_valid
2019-04-29 19:02:39 +02:00
tree-defrag.c
btrfs: open code now trivial btrfs_set_lock_blocking
2019-02-25 14:13:27 +01:00
tree-log.c
btrfs: Make btrfs_pin_extent_for_log_replay take transaction handle
2020-03-23 17:01:37 +01:00
tree-log.h
btrfs: get fs_info from trans in btrfs_set_log_full_commit
2019-04-29 19:02:41 +02:00
ulist.c
btrfs: replace GPL boilerplate by SPDX -- sources
2018-04-12 16:29:51 +02:00
ulist.h
btrfs: replace GPL boilerplate by SPDX -- headers
2018-04-12 16:29:46 +02:00
uuid-tree.c
btrfs: handle ENOENT in btrfs_uuid_tree_iterate
2019-12-13 14:10:45 +01:00
volumes.c
btrfs: use the page cache for super block reading
2020-03-23 17:01:39 +01:00
volumes.h
btrfs: use the page cache for super block reading
2020-03-23 17:01:39 +01:00
xattr.c
Btrfs: fix failure to persist compression property xattr deletion on fsync
2019-06-17 16:37:17 +02:00
xattr.h
btrfs: cleanup btrfs_setxattr_trans and drop transaction parameter
2019-04-29 19:02:44 +02:00
zlib.c
btrfs: use larger zlib buffer for s390 hardware compression
2020-01-31 10:30:40 -08:00
zstd.c
btrfs: compression: inline free_workspace
2019-11-18 12:46:59 +01:00