/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */ /* * nilfs2_api.h - NILFS2 user space API * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * * This program is free software; 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 <linux/types.h> #include <linux/ioctl.h> /** * 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 { … }; /* checkpoint flags */ enum { … }; #define NILFS_CPINFO_FNS(flag, name) … 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 { … }; /* segment usage flags */ enum { … }; #define NILFS_SUINFO_FNS(flag, name) … 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) { … } /** * 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 { … }; enum { … }; #define NILFS_SUINFO_UPDATE_FNS(flag, name) … NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod) NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks) NILFS_SUINFO_UPDATE_FNS(FLAGS, flags) enum { … }; /** * struct nilfs_cpmode - change checkpoint mode structure * @cm_cno: checkpoint number * @cm_mode: mode of checkpoint * @cm_pad: padding */ struct nilfs_cpmode { … }; /** * 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 { … }; /** * struct nilfs_period - period of checkpoint numbers * @p_start: start checkpoint number (inclusive) * @p_end: end checkpoint number (exclusive) */ struct nilfs_period { … }; /** * struct nilfs_cpstat - checkpoint statistics * @cs_cno: checkpoint number * @cs_ncps: number of checkpoints * @cs_nsss: number of snapshots */ struct nilfs_cpstat { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; #define NILFS_IOCTL_IDENT … #define NILFS_IOCTL_CHANGE_CPMODE … #define NILFS_IOCTL_DELETE_CHECKPOINT … #define NILFS_IOCTL_GET_CPINFO … #define NILFS_IOCTL_GET_CPSTAT … #define NILFS_IOCTL_GET_SUINFO … #define NILFS_IOCTL_GET_SUSTAT … #define NILFS_IOCTL_GET_VINFO … #define NILFS_IOCTL_GET_BDESCS … #define NILFS_IOCTL_CLEAN_SEGMENTS … #define NILFS_IOCTL_SYNC … #define NILFS_IOCTL_RESIZE … #define NILFS_IOCTL_SET_ALLOC_RANGE … #define NILFS_IOCTL_SET_SUINFO … #endif /* _LINUX_NILFS2_API_H */
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