Commit 90ccf7dd authored by Andreas Rohner's avatar Andreas Rohner Committed by Linus Torvalds
Browse files

nilfs2: add struct nilfs_suinfo_update and flags 



Add the nilfs_suinfo_update structure, which contains the information
needed to update one segment usage entry.  The flags specify, which
fields need to be updated.

Signed-off-by: default avatarAndreas Rohner <andreas.rohner@gmx.net>
Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e2126935

include/linux/nilfs2_fs.h

+42 −0
Original line number Diff line number Diff line
@@ -710,6 +710,48 @@ static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si) 
}



/* ioctl */

/**

 * nilfs_suinfo_update - segment usage information update

 * @sup_segnum: segment number

 * @sup_flags: flags for which fields are active in sup_sui

 * @sup_reserved: reserved necessary for alignment

 * @sup_sui: segment usage information

 */

struct nilfs_suinfo_update {

	__u64 sup_segnum;

	__u32 sup_flags;

	__u32 sup_reserved;

	struct nilfs_suinfo sup_sui;

};



enum {

	NILFS_SUINFO_UPDATE_LASTMOD,

	NILFS_SUINFO_UPDATE_NBLOCKS,

	NILFS_SUINFO_UPDATE_FLAGS,

	__NR_NILFS_SUINFO_UPDATE_FIELDS,

};



#define NILFS_SUINFO_UPDATE_FNS(flag, name)				\

static inline void							\

nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup)		\

{									\

	sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag;		\

}									\

static inline void							\

nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup)	\

{									\

	sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag);		\

}									\

static inline int							\

nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup)	\

{									\

	return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\

}



NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)

NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)

NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)



enum {

	NILFS_CHECKPOINT,

	NILFS_SNAPSHOT,

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