sfrench/cifs-2.6.git
4 years agobtrfs: qgroup: Move half of the qgroup accounting time out of commit trans
Qu Wenruo [Wed, 15 Feb 2017 02:43:03 +0000 (10:43 +0800)]
btrfs: qgroup: Move half of the qgroup accounting time out of commit trans

Just as Filipe pointed out, the most time consuming parts of qgroup are
btrfs_qgroup_account_extents() and
btrfs_qgroup_prepare_account_extents().
Which both call btrfs_find_all_roots() to get old_roots and new_roots
ulist.

What makes things worse is, we're calling that expensive
btrfs_find_all_roots() at transaction committing time with
TRANS_STATE_COMMIT_DOING, which will blocks all incoming transaction.

Such behavior is necessary for @new_roots search as current
btrfs_find_all_roots() can't do it correctly so we do call it just
before switch commit roots.

However for @old_roots search, it's not necessary as such search is
based on commit_root, so it will always be correct and we can move it
out of transaction committing.

This patch moves the @old_roots search part out of
commit_transaction(), so in theory we can half the time qgroup time
consumption at commit_transaction().

But please note that, this won't speedup qgroup overall, the total time
consumption is still the same, just reduce the performance stall.

Cc: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from adjust_slots_upwards
David Sterba [Fri, 10 Feb 2017 19:30:23 +0000 (20:30 +0100)]
btrfs: remove unused parameter from adjust_slots_upwards

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameters from __btrfs_write_out_cache
David Sterba [Fri, 10 Feb 2017 19:26:24 +0000 (20:26 +0100)]
btrfs: remove unused parameters from __btrfs_write_out_cache

Both unused after the call to update_cache_item has been moved to
__btrfs_wait_cache_io.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from cleanup_write_cache_enospc
David Sterba [Fri, 10 Feb 2017 19:23:00 +0000 (20:23 +0100)]
btrfs: remove unused parameter from cleanup_write_cache_enospc

bitmap_list is unused since the io_ctl framework.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from __add_inode_ref
David Sterba [Fri, 10 Feb 2017 19:20:19 +0000 (20:20 +0100)]
btrfs: remove unused parameter from __add_inode_ref

Unused since the helper has been split, eb used in the caller.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from clone_copy_inline_extent
David Sterba [Fri, 10 Feb 2017 19:18:49 +0000 (20:18 +0100)]
btrfs: remove unused parameter from clone_copy_inline_extent

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameters from btrfs_cmp_data
David Sterba [Fri, 10 Feb 2017 19:15:10 +0000 (20:15 +0100)]
btrfs: remove unused parameters from btrfs_cmp_data

After the page locking has been reworked, we get all pages prepared via
cmp_pages.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from __add_inline_refs
David Sterba [Fri, 10 Feb 2017 18:57:27 +0000 (19:57 +0100)]
btrfs: remove unused parameter from __add_inline_refs

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameters from scrub_setup_wr_ctx
David Sterba [Fri, 10 Feb 2017 18:55:54 +0000 (19:55 +0100)]
btrfs: remove unused parameters from scrub_setup_wr_ctx

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from create_snapshot
David Sterba [Fri, 10 Feb 2017 18:54:06 +0000 (19:54 +0100)]
btrfs: remove unused parameter from create_snapshot

The name parameters have never been used, as the name is passed via the
dentry.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from init_first_rw_device
David Sterba [Fri, 10 Feb 2017 18:49:01 +0000 (19:49 +0100)]
btrfs: remove unused parameter from init_first_rw_device

The 'device' used to be added in that function, but now it's done by the
caller.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from __btrfs_alloc_chunk
David Sterba [Fri, 10 Feb 2017 18:46:27 +0000 (19:46 +0100)]
btrfs: remove unused parameter from __btrfs_alloc_chunk

We grab fs_info from other parameters.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from btrfs_fill_super
David Sterba [Fri, 10 Feb 2017 18:44:31 +0000 (19:44 +0100)]
btrfs: remove unused parameter from btrfs_fill_super

Never used for anything meaningful since we have our own superblock
filler.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from extent_write_cache_pages
David Sterba [Fri, 10 Feb 2017 18:38:24 +0000 (19:38 +0100)]
btrfs: remove unused parameter from extent_write_cache_pages

The 'tree' was used to call locking hook that does not exist anymore.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from add_pending_csums
David Sterba [Fri, 10 Feb 2017 18:35:37 +0000 (19:35 +0100)]
btrfs: remove unused parameter from add_pending_csums

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from update_nr_written
David Sterba [Fri, 10 Feb 2017 18:33:41 +0000 (19:33 +0100)]
btrfs: remove unused parameter from update_nr_written

The logic has been updated in "Btrfs: make mapping->writeback_index
point to the last written page" (a91326679f2a0a4c2) and page is not
needed anymore.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from submit_extent_page
David Sterba [Fri, 10 Feb 2017 18:29:38 +0000 (19:29 +0100)]
btrfs: remove unused parameter from submit_extent_page

This used to hold number of maximum pages to allocate, but this is now
limited by BIO_MAX_PAGES. The local are now unused and removed as well.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from tree_move_next_or_upnext
David Sterba [Fri, 10 Feb 2017 18:25:51 +0000 (19:25 +0100)]
btrfs: remove unused parameter from tree_move_next_or_upnext

Not needed.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from tree_move_down
David Sterba [Fri, 10 Feb 2017 18:24:53 +0000 (19:24 +0100)]
btrfs: remove unused parameter from tree_move_down

Never needed.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from btrfs_check_super_valid
David Sterba [Fri, 10 Feb 2017 18:23:20 +0000 (19:23 +0100)]
btrfs: remove unused parameter from btrfs_check_super_valid

None of the checks need to know the ro/rw status as they're all not
changing the superblock. Moreover, we can access the sb flags directly
if we'd need to decide by the ro/rw status.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from btrfs_prepare_extent_commit
David Sterba [Fri, 10 Feb 2017 18:20:56 +0000 (19:20 +0100)]
btrfs: remove unused parameter from btrfs_prepare_extent_commit

Added but never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from btrfs_subvolume_release_metadata
David Sterba [Fri, 10 Feb 2017 18:18:18 +0000 (19:18 +0100)]
btrfs: remove unused parameter from btrfs_subvolume_release_metadata

Unused since qgroup refactoring that split data and metadata accounting,
the btrfs_qgroup_free helper.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from __push_leaf_left
David Sterba [Fri, 10 Feb 2017 18:14:36 +0000 (19:14 +0100)]
btrfs: remove unused parameter from __push_leaf_left

Unused since long ago.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from __push_leaf_right
David Sterba [Fri, 10 Feb 2017 18:13:06 +0000 (19:13 +0100)]
btrfs: remove unused parameter from __push_leaf_right

Unused since long ago.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: merge two superblock writing helpers
David Sterba [Fri, 10 Feb 2017 18:04:32 +0000 (19:04 +0100)]
btrfs: merge two superblock writing helpers

write_all_supers and write_ctree_super are almost equal, the parameter
'trans' is unused so we can drop it and have just one helper.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from write_dev_supers
David Sterba [Fri, 10 Feb 2017 17:52:06 +0000 (18:52 +0100)]
btrfs: remove unused parameter from write_dev_supers

The barriers are handled by the caller.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from split_item
David Sterba [Fri, 10 Feb 2017 17:49:53 +0000 (18:49 +0100)]
btrfs: remove unused parameter from split_item

Never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from clean_tree_block
David Sterba [Fri, 10 Feb 2017 17:47:57 +0000 (18:47 +0100)]
btrfs: remove unused parameter from clean_tree_block

Added but never needed.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from check_async_write
David Sterba [Fri, 10 Feb 2017 17:46:09 +0000 (18:46 +0100)]
btrfs: remove unused parameter from check_async_write

Added but never used.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused parameter from read_block_for_search
David Sterba [Fri, 10 Feb 2017 17:44:32 +0000 (18:44 +0100)]
btrfs: remove unused parameter from read_block_for_search

Never used in that function.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: ulist: rename ulist_fini to ulist_release
David Sterba [Wed, 15 Feb 2017 15:47:36 +0000 (16:47 +0100)]
btrfs: ulist: rename ulist_fini to ulist_release

Change the name so it matches the naming we already use eg. for
btrfs_path.

Suggested-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove pointless rcu protection from btrfs_qgroup_inherit
David Sterba [Mon, 13 Feb 2017 14:05:33 +0000 (15:05 +0100)]
btrfs: remove pointless rcu protection from btrfs_qgroup_inherit

There was never need for RCU protection around reading nodesize or other
fairly constant filesystem data.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: qgroups: opencode qgroup_free helper
David Sterba [Mon, 13 Feb 2017 13:24:35 +0000 (14:24 +0100)]
btrfs: qgroups: opencode qgroup_free helper

The helper name is not too helpful and is just wrapping a simple call.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unnecessary mutex lock in qgroup_account_snapshot
David Sterba [Mon, 13 Feb 2017 13:07:02 +0000 (14:07 +0100)]
btrfs: remove unnecessary mutex lock in qgroup_account_snapshot

The quota status used to be tracked as a variable, so the mutex was
needed (until "Btrfs: add a flags field to btrfs_fs_info" afcdd129e05a9).
Since the status is a bit modified atomically and we don't hold the
mutex beyond the check, we can drop it.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: check quota status earlier and don't do unnecessary frees
David Sterba [Mon, 13 Feb 2017 13:05:24 +0000 (14:05 +0100)]
btrfs: check quota status earlier and don't do unnecessary frees

Status of quotas should be the first check in
btrfs_qgroup_account_extent and we can return immediatelly, no need to
do no-op ulist frees.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: embed extent_changeset::range_changed to the structure
David Sterba [Mon, 13 Feb 2017 12:42:29 +0000 (13:42 +0100)]
btrfs: embed extent_changeset::range_changed to the structure

We can embed range_changed to the extent changeset to address following
problems:

- no need to allocate ulist dynamically, we also get rid of the GFP_NOFS
  for free
- fix lack of allocation failure checking in btrfs_qgroup_reserve_data

The stack consuption where extent_changeset is used slightly increases:

before: 16
after: 16 - 8 (for pointer) + 32 (sizeof ulist) = 40

Which is bearable.

Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: ulist: make the finalization function public
David Sterba [Mon, 13 Feb 2017 12:40:16 +0000 (13:40 +0100)]
btrfs: ulist: make the finalization function public

Make ulist_fini externally visible so the ulist API is complete.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: qgroups: make __del_qgroup_relation static
David Sterba [Mon, 13 Feb 2017 12:00:51 +0000 (13:00 +0100)]
btrfs: qgroups: make __del_qgroup_relation static

Internal helper.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: make space cache inode readahead failure nonfatal
David Sterba [Mon, 23 Jan 2017 16:28:19 +0000 (17:28 +0100)]
btrfs: make space cache inode readahead failure nonfatal

We do a readahead of the free space cache inode to speed things up but
the failure is not fatal, like in other readahead cases. Proper reads
would need to happen anyway and any errors would be caught there.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: use GFP_KERNEL in btrfs_add/del_qgroup_relation
David Sterba [Mon, 13 Feb 2017 11:41:02 +0000 (12:41 +0100)]
btrfs: use GFP_KERNEL in btrfs_add/del_qgroup_relation

Qgroup relations are added/deleted from ioctl, we hold the high level
qgroup lock, no deadlocks or recursion from the allocation possible
here.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: use GFP_KERNEL in btrfs_quota_enable
David Sterba [Mon, 13 Feb 2017 10:03:44 +0000 (11:03 +0100)]
btrfs: use GFP_KERNEL in btrfs_quota_enable

We don't need to use GFP_NOFS here as this is called from ioctls an the
only lock held is the subvol_sem, which is of a high level and protects
creation/renames/deletion and is never held in the writeout paths.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: use GFP_KERNEL in btrfs_read_qgroup_config
David Sterba [Mon, 13 Feb 2017 11:10:20 +0000 (12:10 +0100)]
btrfs: use GFP_KERNEL in btrfs_read_qgroup_config

The qgroup config is read during mount, we do not have to use NOFS.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: use GFP_KERNEL in create_snapshot
David Sterba [Mon, 13 Feb 2017 10:03:44 +0000 (11:03 +0100)]
btrfs: use GFP_KERNEL in create_snapshot

We don't need to use GFP_NOFS here as this is called from ioctls an the
only lock held is the subvol_sem, which is of a high level and protects
creation/renames/deletion and is never held in the writeout paths.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: specify a new ordered extent type for create_io_em
Liu Bo [Mon, 13 Feb 2017 23:35:09 +0000 (15:35 -0800)]
Btrfs: specify a new ordered extent type for create_io_em

As 0 refers to an existing type BTRFS_ORDERED_IO_DONE, this specifies a
new type 'REGULAR' for regular IO.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: create a helper to create em for IO
Liu Bo [Tue, 31 Jan 2017 15:50:22 +0000 (07:50 -0800)]
Btrfs: create a helper to create em for IO

We have similar codes to create and insert extent mapping around IO path,
this merges them into a single helper.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: use helper to get used bytes of space_info
Liu Bo [Mon, 13 Feb 2017 23:42:21 +0000 (15:42 -0800)]
Btrfs: use helper to get used bytes of space_info

This uses a helper instead of open code around used byte of space_info
everywhere.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: try to avoid acquiring free space ctl's lock
Liu Bo [Mon, 13 Feb 2017 23:42:30 +0000 (15:42 -0800)]
Btrfs: try to avoid acquiring free space ctl's lock

We don't need to take the lock if the block group has not been cached.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Better csum error message for data csum mismatch
Qu Wenruo [Thu, 9 Feb 2017 02:45:06 +0000 (10:45 +0800)]
btrfs: Better csum error message for data csum mismatch

The original csum error message only outputs inode number, offset, check
sum and expected check sum.

However no root objectid is outputted, which sometimes makes debugging
quite painful under multi-subvolume case (including relocation).

Also the checksum output is decimal, which seldom makes sense for
users/developers and is hard to read in most time.

This patch will add root objectid, which will be %lld for rootid larger
than LAST_FREE_OBJECTID, and hex csum output for better readability.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: add another missing end_page_writeback on submit_extent_page failure
Takafumi Kubota [Thu, 9 Feb 2017 08:24:33 +0000 (17:24 +0900)]
Btrfs: add another missing end_page_writeback on submit_extent_page failure

If btrfs_bio_alloc fails in submit_extent_page, submit_extent_page returns
without clearing the writeback bit of the failed page.

__extent_writepage_io, that is a caller of submit_extent_page,
does not clear the remaining writeback bit anywhere.
As a result, this will cause the hang at filemap_fdatawait_range,
because it waits the writeback bit to be cleared from the failed page.
So, we have to call end_page_writeback to clear the writeback bit.

For reproducing the hang, we inject a fault like

   if (should_failtest()) { // I define should_failtest()
        bio = NULL;
   }
   else {
        bio = btrfs_bio_alloc(...);
   }

in submit_extent_page.

We should also check whether page has the bit before end_page_writeback,
to avoid the conflict against the other end_page_writeback in bio_endio.
Thus, we add PageWriteback checks not only in __extent_writepage_io,
but also in write_one_eb too, because it misses the check.

Signed-off-by: Takafumi Kubota <takafumi.kubota1012@sslab.ics.keio.ac.jp>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Cc: David Sterba <dsterba@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: remove unused ulist members
David Sterba [Thu, 9 Feb 2017 15:47:43 +0000 (16:47 +0100)]
btrfs: remove unused ulist members

Commit "btrfs: ulist: Add ulist_del() function" (d4b804045924d7f8)
removed some debugging code but left the structure defintions.

Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: use helper to simplify lock/unlock pages
Liu Bo [Fri, 10 Feb 2017 15:42:14 +0000 (16:42 +0100)]
Btrfs: use helper to simplify lock/unlock pages

Since we have a helper to set page bits, let lock_delalloc_pages and
__unlock_for_delalloc use it.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: teach __process_pages_contig about PAGE_LOCK operation
Liu Bo [Fri, 10 Feb 2017 15:41:05 +0000 (16:41 +0100)]
btrfs: teach __process_pages_contig about PAGE_LOCK operation

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ changes to the helper separated from the following patch ]
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: create helper for processing bits on contiguous pages
Liu Bo [Fri, 3 Feb 2017 01:49:22 +0000 (17:49 -0800)]
Btrfs: create helper for processing bits on contiguous pages

This introduces a new helper which can be used to process pages bits.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: kill trans in run_delalloc_nocow and btrfs_cross_ref_exist
Liu Bo [Mon, 30 Jan 2017 20:25:28 +0000 (12:25 -0800)]
Btrfs: kill trans in run_delalloc_nocow and btrfs_cross_ref_exist

run_delalloc_nocow has used trans in two places where they don't
actually need @trans.

For btrfs_lookup_file_extent, we search for file extents without COWing
anything, and for btrfs_cross_ref_exist, the only place where we need
@trans is deferencing it in order to get running_transaction which we
could easily get from the global fs_info.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head
Liu Bo [Mon, 30 Jan 2017 20:24:37 +0000 (12:24 -0800)]
Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head

All we need is @delayed_refs, all callers have get it ahead of calling
btrfs_find_delayed_ref_head since lock needs to be acquired firstly,
there is no reason to deference it again inside the function.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: remove unused trans in read_block_for_search
Liu Bo [Mon, 30 Jan 2017 20:23:42 +0000 (12:23 -0800)]
Btrfs: remove unused trans in read_block_for_search

@trans is not used at all, this removes it.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: cleanup unused cached_state in __extent_writepage_io
Liu Bo [Thu, 26 Jan 2017 01:15:54 +0000 (17:15 -0800)]
Btrfs: cleanup unused cached_state in __extent_writepage_io

@cached_state is no more required in __extent_writepage_io, also remove
the goto label.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: allow unlink to exceed subvolume quota
Jeff Mahoney [Wed, 25 Jan 2017 14:50:33 +0000 (09:50 -0500)]
btrfs: allow unlink to exceed subvolume quota

Once a qgroup limit is exceeded, it's impossible to restore normal
operation to the subvolume without modifying the limit or removing
the subvolume.  This is a surprising situation for many users used
to the typical workflow with quotas on other file systems where it's
possible to remove files until the used space is back under the limit.

When we go to unlink a file and start the transaction, we'll hit
the qgroup limit while trying to reserve space for the items we'll
modify while removing the file.  We discussed last month how best
to handle this situation and agreed that there is no perfect solution.
The best principle-of-least-surprise solution is to handle it similarly
to how we already handle ENOSPC when unlinking, which is to allow
the operation to succeed with the expectation that it will ultimately
release space under most circumstances.

This patch modifies the transaction start path to select whether to
honor the qgroups limits.  btrfs_start_transaction_fallback_global_rsv
is the only caller that skips enforcement.  The reservation and tracking
still happens normally -- it just skips the enforcement step.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: fix wrong argument for btrfs_lookup_ordered_range
Liu Bo [Tue, 24 Jan 2017 23:58:51 +0000 (15:58 -0800)]
Btrfs: fix wrong argument for btrfs_lookup_ordered_range

Commit Btrfs: btrfs_page_mkwrite: Reserve space in sectorsized units"
(d0b7da88) did this, but btrfs_lookup_ordered_range expects a 'length'
rather than a 'page_end'.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: raid56: Remove unused variable in lock_stripe_add
Qu Wenruo [Mon, 16 Jan 2017 02:23:06 +0000 (10:23 +0800)]
btrfs: raid56: Remove unused variable in lock_stripe_add

Variable 'walk' in lock_stripe_add() is not used.  Remove it.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: refactor btrfs_extent_same() slightly
Omar Sandoval [Wed, 18 Jan 2017 07:37:38 +0000 (23:37 -0800)]
Btrfs: refactor btrfs_extent_same() slightly

This was originally a prep patch for changing the behavior on len=0, but
we went another direction with that. This still makes the function
slightly easier to follow.

Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: constify struct btrfs_{,disk_}key wherever possible
Omar Sandoval [Wed, 18 Jan 2017 07:24:37 +0000 (23:24 -0800)]
Btrfs: constify struct btrfs_{,disk_}key wherever possible

In a lot of places, it's unclear when it's safe to reuse a struct
btrfs_key after it has been passed to a helper function. Constify these
arguments wherever possible to make it obvious.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: fix another race between truncate and lockless dio write
Liu Bo [Thu, 15 Dec 2016 06:36:05 +0000 (22:36 -0800)]
Btrfs: fix another race between truncate and lockless dio write

Dio writes can update i_size in btrfs_get_blocks_direct when it
writes to offset beyond EOF so that endio can update disk_i_size
correctly (because we don't udpate disk_i_size beyond i_size).

However, when truncating down a file, we firstly update i_size
and then wait for in-flight lockless dio reads/writes, according
to the above, i_size may have been changed in dio writes, and
file extents don't get truncated.

For lockless dio writes are always overwrites, i_size is not
supposed to be changed, so this adds a check to filter out this
case.

The race could be reproduced by fstests/generic/299 with patch
"Btrfs: fix btrfs_ordered_update_i_size to update disk_i_size properly"
 applied.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: clean up btrfs_ordered_update_i_size
Liu Bo [Tue, 13 Dec 2016 20:51:51 +0000 (12:51 -0800)]
Btrfs: clean up btrfs_ordered_update_i_size

Since we have a good helper entry_end, use it for ordered extent.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ whitespace reformatting ]
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: fix comment in btrfs_page_mkwrite
Liu Bo [Tue, 13 Dec 2016 20:15:19 +0000 (12:15 -0800)]
Btrfs: fix comment in btrfs_page_mkwrite

The comment about "page_mkwrite gets called every time the page is
dirtied" in btrfs_page_mkwrite is not correct, it only gets called the
first time the page gets dirtied after the page faults in.

However, we don't need to touch the code because it works well, although
the proper logic is to check if delalloc bits has been set and if so, go
free reserved space, if not, set the delalloc bits for dirty page range.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agoBtrfs: fix btrfs_ordered_update_i_size to update disk_i_size properly
Liu Bo [Thu, 1 Dec 2016 21:01:02 +0000 (13:01 -0800)]
Btrfs: fix btrfs_ordered_update_i_size to update disk_i_size properly

btrfs_ordered_update_i_size can be called by truncate and endio, but
only endio takes ordered_extent which contains the completed IO.

while truncating down a file, if there are some in-flight IOs,
btrfs_ordered_update_i_size in endio will set disk_i_size to
@orig_offset that is zero.  If truncating-down fails somehow, we try to
recover in memory isize with this zero'd disk_i_size.

Fix it by only updating disk_i_size with @orig_offset when
btrfs_ordered_update_i_size is not called from endio while truncating
down and waiting for in-flight IOs completing their work before recover
in-memory size.

Besides fixing the above issue, add an assertion for last_size to double
check we truncate down to the desired size.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: fix over-80 lines introduced by previous cleanups
David Sterba [Fri, 20 Jan 2017 13:54:07 +0000 (14:54 +0100)]
btrfs: fix over-80 lines introduced by previous cleanups

This goes as a separate patch because fixing that inside the patches
caused too many many conflicts.

Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make count_inode_refs take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:50 +0000 (00:31 +0200)]
btrfs: Make count_inode_refs take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make count_inode_extrefs take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:49 +0000 (00:31 +0200)]
btrfs: Make count_inode_extrefs take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_log_inode take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:48 +0000 (00:31 +0200)]
btrfs: Make btrfs_log_inode take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make log_inode_item take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:47 +0000 (00:31 +0200)]
btrfs: Make log_inode_item take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make __add_inode_ref take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:46 +0000 (00:31 +0200)]
btrfs: Make __add_inode_ref take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make drop_one_dir_item take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:45 +0000 (00:31 +0200)]
btrfs: Make drop_one_dir_item take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_unlink_inode take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:44 +0000 (00:31 +0200)]
btrfs: Make btrfs_unlink_inode take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make log_new_dir_dentries take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:43 +0000 (00:31 +0200)]
btrfs: Make log_new_dir_dentries take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make log_directory_changes take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:42 +0000 (00:31 +0200)]
btrfs: Make log_directory_changes take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make log_dir_items take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:41 +0000 (00:31 +0200)]
btrfs: Make log_dir_items take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_log_changed_extents take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:40 +0000 (00:31 +0200)]
btrfs: Make btrfs_log_changed_extents take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_get_logged_extents take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:39 +0000 (00:31 +0200)]
btrfs: Make btrfs_get_logged_extents take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_log_trailing_hole take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:38 +0000 (00:31 +0200)]
btrfs: Make btrfs_log_trailing_hole take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_log_all_xattrs take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:37 +0000 (00:31 +0200)]
btrfs: Make btrfs_log_all_xattrs take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make copy_items take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:36 +0000 (00:31 +0200)]
btrfs: Make copy_items take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_check_ref_name_override take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:35 +0000 (00:31 +0200)]
btrfs: Make btrfs_check_ref_name_override take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make logged_inode_size take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:34 +0000 (00:31 +0200)]
btrfs: Make logged_inode_size take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_del_inode_ref take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:33 +0000 (00:31 +0200)]
btrfs: Make btrfs_del_inode_ref take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_del_dir_entries_in_log take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:32 +0000 (00:31 +0200)]
btrfs: Make btrfs_del_dir_entries_in_log take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_log_new_name take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:31 +0000 (00:31 +0200)]
btrfs: Make btrfs_log_new_name take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_inode_in_log take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:30 +0000 (00:31 +0200)]
btrfs: Make btrfs_inode_in_log take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_record_snapshot_destroy take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:29 +0000 (00:31 +0200)]
btrfs: Make btrfs_record_snapshot_destroy take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_record_unlink_dir take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:28 +0000 (00:31 +0200)]
btrfs: Make btrfs_record_unlink_dir take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_must_commit_transaction take btrfs_inode
Nikolay Borisov [Tue, 17 Jan 2017 22:31:27 +0000 (00:31 +0200)]
btrfs: Make btrfs_must_commit_transaction take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_inode_delayed_dir_index_count take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:42 +0000 (20:35 +0200)]
btrfs: Make btrfs_inode_delayed_dir_index_count take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_commit_inode_delayed_items take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:41 +0000 (20:35 +0200)]
btrfs: Make btrfs_commit_inode_delayed_items take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_commit_inode_delayed_inode take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:40 +0000 (20:35 +0200)]
btrfs: Make btrfs_commit_inode_delayed_inode take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_remove_delayed_node take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:39 +0000 (20:35 +0200)]
btrfs: Make btrfs_remove_delayed_node take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_kill_delayed_inode_items take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:38 +0000 (20:35 +0200)]
btrfs: Make btrfs_kill_delayed_inode_items take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_delayed_delete_inode_ref take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:37 +0000 (20:35 +0200)]
btrfs: Make btrfs_delayed_delete_inode_ref take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_delete_delayed_dir_index take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:36 +0000 (20:35 +0200)]
btrfs: Make btrfs_delete_delayed_dir_index take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_insert_delayed_dir_index take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:35 +0000 (20:35 +0200)]
btrfs: Make btrfs_insert_delayed_dir_index take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: Make btrfs_delayed_inode_reserve_metadata take btrfs_inode
Nikolay Borisov [Tue, 10 Jan 2017 18:35:34 +0000 (20:35 +0200)]
btrfs: Make btrfs_delayed_inode_reserve_metadata take btrfs_inode

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>