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authorGerhard Heift <gerhard@heift.name>2014-01-30 16:24:03 +0100
committerChris Mason <clm@fb.com>2014-06-13 18:52:19 +0200
commitcc68a8a5a4330a4bb72922d0c7a7044ae13ee692 (patch)
tree8b5b09704b99bb0956836c8d45b6228cfcc2bfee /fs/btrfs/reada.c
parentbtrfs: tree_search, search_ioctl: direct copy to userspace (diff)
downloadlinux-cc68a8a5a4330a4bb72922d0c7a7044ae13ee692.tar.xz
linux-cc68a8a5a4330a4bb72922d0c7a7044ae13ee692.zip
btrfs: new ioctl TREE_SEARCH_V2
This new ioctl call allows the user to supply a buffer of varying size in which a tree search can store its results. This is much more flexible if you want to receive items which are larger than the current fixed buffer of 3992 bytes or if you want to fetch more items at once. Items larger than this buffer are for example some of the type EXTENT_CSUM. Signed-off-by: Gerhard Heift <Gerhard@Heift.Name> Signed-off-by: Chris Mason <clm@fb.com> Acked-by: David Sterba <dsterba@suse.cz>
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