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fs: support LOGICAL_INO_V2

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Automatically fall back to LOGICAL_INO if LOGICAL_INO_V2 fails and no
_V2 flags are used.

Add methods to set the flags argument with build portability to older
headers.

Use thread_local storage for the somewhat large buffers used by
LOGICAL_INO_V2 (and other users of BtrfsDataContainer like INO_PATHS).

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2018-11-01 23:39:54 -04:00
parent c2762740ef
commit 8cbd6fc67a
3 changed files with 140 additions and 23 deletions
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5
include/crucible/btrfs.h
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@ -202,4 +202,9 @@
struct btrfs_ioctl_search_args_v2)
#endif
#ifndef BTRFS_IOC_LOGICAL_INO_V2
#define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, struct btrfs_ioctl_logical_ino_args)
#define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET (1ULL << 0)
#endif
#endif // CRUCIBLE_BTRFS_H