Btrfs: adjust btrfs_discard_extent() return errors and trimmed bytes

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Callers of btrfs_discard_extent() should check if we are mounted with -o discard,
as we want to make fitrim to work even the fs is not mounted with -o discard.
Also we should use REQ_DISCARD to map the free extent to get a full mapping,
last we only return errors if
1. the error is not a EOPNOTSUPP
2. no device supports discard

Signed-off-by: Li Dongyang <lidongyang@novell.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Li Dongyang 2011-03-24 10:24:27 +00:00 • committed by root

parent fce3bb9a1b

commit 5378e60734

3 changed files with 31 additions and 19 deletions

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2

fs/btrfs/ctree.h

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5

fs/btrfs/disk-io.c

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43

fs/btrfs/extent-tree.c

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