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Btrfs: make btrfs_map_block() return entire free extent for each device of RAID0/1/10/DUP

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btrfs_map_block() will only return a single stripe length, but we want the
full extent be mapped to each disk when we are trimming the extent,
so we add length to btrfs_bio_stripe and fill it if we are mapping for REQ_DISCARD.

Signed-off-by: Li Dongyang <lidongyang@novell.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Li Dongyang
2011-03-24 10:24:26 +00:00
committed by root
parent b4d00d569a
commit fce3bb9a1b
2 changed files with 129 additions and 22 deletions
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fs/btrfs/volumes.h
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@@ -126,6 +126,7 @@ struct btrfs_fs_devices {
struct btrfs_bio_stripe {
struct btrfs_device *dev;
u64 physical;
u64 length; /* only used for discard mappings */
};
struct btrfs_multi_bio {