btrfs: introduce btrfs_inode_lock()/unlock()

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btrfs_inode_lock/unlock() are wrappers around inode locks, separating
the type of lock and actual locking.

- 0 - default, exclusive lock
- BTRFS_ILOCK_SHARED - for shared locks, for possible parallel DIO
- BTRFS_ILOCK_TRY - for the RWF_NOWAIT sequence

The bits SHARED and TRY can be combined together.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Goldwyn Rodrigues 2020-09-24 11:39:16 -05:00 • committed by David Sterba

parent b8d8e1fd57

commit a14b78ad06

3 changed files with 69 additions and 16 deletions

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7

fs/btrfs/ctree.h

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33

fs/btrfs/file.c

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45

fs/btrfs/inode.c

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