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you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. */ #ifndef _LINUX_NILFS2_API_H #define _LINUX_NILFS2_API_H #include #include /** * struct nilfs_cpinfo - checkpoint information * @ci_flags: flags * @ci_pad: padding * @ci_cno: checkpoint number * @ci_create: creation timestamp * @ci_nblk_inc: number of blocks incremented by this checkpoint * @ci_inodes_count: inodes count * @ci_blocks_count: blocks count * @ci_next: next checkpoint number in snapshot list */ struct nilfs_cpinfo { __u32 ci_flags; __u32 ci_pad; __u64 ci_cno; __u64 ci_create; __u64 ci_nblk_inc; __u64 ci_inodes_count; __u64 ci_blocks_count; __u64 ci_next; }; /* checkpoint flags */ enum { NILFS_CPINFO_SNAPSHOT, NILFS_CPINFO_INVALID, NILFS_CPINFO_SKETCH, NILFS_CPINFO_MINOR, }; #define NILFS_CPINFO_FNS(flag, name) \ static __inline__ int \ nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \ { \ return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag)); \ } NILFS_CPINFO_FNS(SNAPSHOT, snapshot) NILFS_CPINFO_FNS(INVALID, invalid) NILFS_CPINFO_FNS(MINOR, minor) /** * nilfs_suinfo - segment usage information * @sui_lastmod: timestamp of last modification * @sui_nblocks: number of written blocks in segment * @sui_flags: segment usage flags */ struct nilfs_suinfo { __u64 sui_lastmod; __u32 sui_nblocks; __u32 sui_flags; }; /* segment usage flags */ enum { NILFS_SUINFO_ACTIVE, NILFS_SUINFO_DIRTY, NILFS_SUINFO_ERROR, }; #define NILFS_SUINFO_FNS(flag, name) \ static __inline__ int \ nilfs_suinfo_##name(const struct nilfs_suinfo *si) \ { \ return si->sui_flags & (1UL << NILFS_SUINFO_##flag); \ } NILFS_SUINFO_FNS(ACTIVE, active) NILFS_SUINFO_FNS(DIRTY, dirty) NILFS_SUINFO_FNS(ERROR, error) static __inline__ int nilfs_suinfo_clean(const struct nilfs_suinfo *si) { return !si->sui_flags; } /** * 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, }; /** * struct nilfs_cpmode - change checkpoint mode structure * @cm_cno: checkpoint number * @cm_mode: mode of checkpoint * @cm_pad: padding */ struct nilfs_cpmode { __u64 cm_cno; __u32 cm_mode; __u32 cm_pad; }; /** * struct nilfs_argv - argument vector * @v_base: pointer on data array from userspace * @v_nmembs: number of members in data array * @v_size: size of data array in bytes * @v_flags: flags * @v_index: start number of target data items */ struct nilfs_argv { __u64 v_base; __u32 v_nmembs; /* number of members */ __u16 v_size; /* size of members */ __u16 v_flags; __u64 v_index; }; /** * struct nilfs_period - period of checkpoint numbers * @p_start: start checkpoint number (inclusive) * @p_end: end checkpoint number (exclusive) */ struct nilfs_period { __u64 p_start; __u64 p_end; }; /** * struct nilfs_cpstat - checkpoint statistics * @cs_cno: checkpoint number * @cs_ncps: number of checkpoints * @cs_nsss: number of snapshots */ struct nilfs_cpstat { __u64 cs_cno; __u64 cs_ncps; __u64 cs_nsss; }; /** * struct nilfs_sustat - segment usage statistics * @ss_nsegs: number of segments * @ss_ncleansegs: number of clean segments * @ss_ndirtysegs: number of dirty segments * @ss_ctime: creation time of the last segment * @ss_nongc_ctime: creation time of the last segment not for GC * @ss_prot_seq: least sequence number of segments which must not be reclaimed */ struct nilfs_sustat { __u64 ss_nsegs; __u64 ss_ncleansegs; __u64 ss_ndirtysegs; __u64 ss_ctime; __u64 ss_nongc_ctime; __u64 ss_prot_seq; }; /** * struct nilfs_vinfo - virtual block number information * @vi_vblocknr: virtual block number * @vi_start: start checkpoint number (inclusive) * @vi_end: end checkpoint number (exclusive) * @vi_blocknr: disk block number */ struct nilfs_vinfo { __u64 vi_vblocknr; __u64 vi_start; __u64 vi_end; __u64 vi_blocknr; }; /** * struct nilfs_vdesc - descriptor of virtual block number * @vd_ino: inode number * @vd_cno: checkpoint number * @vd_vblocknr: virtual block number * @vd_period: period of checkpoint numbers * @vd_blocknr: disk block number * @vd_offset: logical block offset inside a file * @vd_flags: flags (data or node block) * @vd_pad: padding */ struct nilfs_vdesc { __u64 vd_ino; __u64 vd_cno; __u64 vd_vblocknr; struct nilfs_period vd_period; __u64 vd_blocknr; __u64 vd_offset; __u32 vd_flags; __u32 vd_pad; }; /** * struct nilfs_bdesc - descriptor of disk block number * @bd_ino: inode number * @bd_oblocknr: disk block address (for skipping dead blocks) * @bd_blocknr: disk block address * @bd_offset: logical block offset inside a file * @bd_level: level in the b-tree organization * @bd_pad: padding */ struct nilfs_bdesc { __u64 bd_ino; __u64 bd_oblocknr; __u64 bd_blocknr; __u64 bd_offset; __u32 bd_level; __u32 bd_pad; }; #define NILFS_IOCTL_IDENT 'n' #define NILFS_IOCTL_CHANGE_CPMODE \ _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode) #define NILFS_IOCTL_DELETE_CHECKPOINT \ _IOW(NILFS_IOCTL_IDENT, 0x81, __u64) #define NILFS_IOCTL_GET_CPINFO \ _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv) #define NILFS_IOCTL_GET_CPSTAT \ _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat) #define NILFS_IOCTL_GET_SUINFO \ _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv) #define NILFS_IOCTL_GET_SUSTAT \ _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat) #define NILFS_IOCTL_GET_VINFO \ _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv) #define NILFS_IOCTL_GET_BDESCS \ _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv) #define NILFS_IOCTL_CLEAN_SEGMENTS \ _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5]) #define NILFS_IOCTL_SYNC \ _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64) #define NILFS_IOCTL_RESIZE \ _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64) #define NILFS_IOCTL_SET_ALLOC_RANGE \ _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2]) #define NILFS_IOCTL_SET_SUINFO \ _IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv) #endif /* _LINUX_NILFS2_API_H */