btrfs: nowait aio support

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Return EAGAIN if any of the following checks fail
 + i_rwsem is not lockable
 + NODATACOW or PREALLOC is not set
 + Cannot nocow at the desired location
 + Writing beyond end of file which is not allocated

Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Goldwyn Rodrigues 2017-06-20 07:05:49 -05:00 • committed by Jens Axboe

parent 29a5d29ec1

commit edf064e7c6

2 changed files with 30 additions and 6 deletions

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33

fs/btrfs/file.c

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3

fs/btrfs/inode.c

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