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293 lines
7.4 KiB
293 lines
7.4 KiB
/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */ |
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/* |
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* nilfs2_api.h - NILFS2 user space API |
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* |
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* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation; either version 2.1 of the License, or |
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* (at your option) any later version. |
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*/ |
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#ifndef _LINUX_NILFS2_API_H |
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#define _LINUX_NILFS2_API_H |
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#include <linux/types.h> |
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#include <linux/ioctl.h> |
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/** |
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* struct nilfs_cpinfo - checkpoint information |
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* @ci_flags: flags |
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* @ci_pad: padding |
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* @ci_cno: checkpoint number |
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* @ci_create: creation timestamp |
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* @ci_nblk_inc: number of blocks incremented by this checkpoint |
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* @ci_inodes_count: inodes count |
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* @ci_blocks_count: blocks count |
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* @ci_next: next checkpoint number in snapshot list |
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*/ |
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struct nilfs_cpinfo { |
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__u32 ci_flags; |
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__u32 ci_pad; |
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__u64 ci_cno; |
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__u64 ci_create; |
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__u64 ci_nblk_inc; |
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__u64 ci_inodes_count; |
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__u64 ci_blocks_count; |
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__u64 ci_next; |
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}; |
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/* checkpoint flags */ |
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enum { |
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NILFS_CPINFO_SNAPSHOT, |
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NILFS_CPINFO_INVALID, |
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NILFS_CPINFO_SKETCH, |
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NILFS_CPINFO_MINOR, |
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}; |
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#define NILFS_CPINFO_FNS(flag, name) \ |
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static inline int \ |
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nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \ |
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{ \ |
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return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag)); \ |
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} |
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NILFS_CPINFO_FNS(SNAPSHOT, snapshot) |
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NILFS_CPINFO_FNS(INVALID, invalid) |
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NILFS_CPINFO_FNS(MINOR, minor) |
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/** |
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* nilfs_suinfo - segment usage information |
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* @sui_lastmod: timestamp of last modification |
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* @sui_nblocks: number of written blocks in segment |
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* @sui_flags: segment usage flags |
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*/ |
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struct nilfs_suinfo { |
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__u64 sui_lastmod; |
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__u32 sui_nblocks; |
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__u32 sui_flags; |
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}; |
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/* segment usage flags */ |
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enum { |
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NILFS_SUINFO_ACTIVE, |
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NILFS_SUINFO_DIRTY, |
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NILFS_SUINFO_ERROR, |
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}; |
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#define NILFS_SUINFO_FNS(flag, name) \ |
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static inline int \ |
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nilfs_suinfo_##name(const struct nilfs_suinfo *si) \ |
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{ \ |
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return si->sui_flags & (1UL << NILFS_SUINFO_##flag); \ |
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} |
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NILFS_SUINFO_FNS(ACTIVE, active) |
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NILFS_SUINFO_FNS(DIRTY, dirty) |
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NILFS_SUINFO_FNS(ERROR, error) |
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static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si) |
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{ |
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return !si->sui_flags; |
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} |
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/** |
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* nilfs_suinfo_update - segment usage information update |
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* @sup_segnum: segment number |
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* @sup_flags: flags for which fields are active in sup_sui |
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* @sup_reserved: reserved necessary for alignment |
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* @sup_sui: segment usage information |
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*/ |
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struct nilfs_suinfo_update { |
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__u64 sup_segnum; |
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__u32 sup_flags; |
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__u32 sup_reserved; |
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struct nilfs_suinfo sup_sui; |
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}; |
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enum { |
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NILFS_SUINFO_UPDATE_LASTMOD, |
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NILFS_SUINFO_UPDATE_NBLOCKS, |
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NILFS_SUINFO_UPDATE_FLAGS, |
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__NR_NILFS_SUINFO_UPDATE_FIELDS, |
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}; |
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#define NILFS_SUINFO_UPDATE_FNS(flag, name) \ |
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static inline void \ |
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nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \ |
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{ \ |
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sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \ |
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} \ |
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static inline void \ |
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nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \ |
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{ \ |
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sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \ |
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} \ |
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static inline int \ |
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nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \ |
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{ \ |
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return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\ |
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} |
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NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod) |
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NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks) |
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NILFS_SUINFO_UPDATE_FNS(FLAGS, flags) |
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enum { |
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NILFS_CHECKPOINT, |
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NILFS_SNAPSHOT, |
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}; |
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/** |
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* struct nilfs_cpmode - change checkpoint mode structure |
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* @cm_cno: checkpoint number |
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* @cm_mode: mode of checkpoint |
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* @cm_pad: padding |
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*/ |
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struct nilfs_cpmode { |
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__u64 cm_cno; |
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__u32 cm_mode; |
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__u32 cm_pad; |
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}; |
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/** |
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* struct nilfs_argv - argument vector |
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* @v_base: pointer on data array from userspace |
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* @v_nmembs: number of members in data array |
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* @v_size: size of data array in bytes |
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* @v_flags: flags |
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* @v_index: start number of target data items |
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*/ |
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struct nilfs_argv { |
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__u64 v_base; |
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__u32 v_nmembs; /* number of members */ |
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__u16 v_size; /* size of members */ |
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__u16 v_flags; |
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__u64 v_index; |
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}; |
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/** |
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* struct nilfs_period - period of checkpoint numbers |
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* @p_start: start checkpoint number (inclusive) |
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* @p_end: end checkpoint number (exclusive) |
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*/ |
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struct nilfs_period { |
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__u64 p_start; |
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__u64 p_end; |
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}; |
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/** |
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* struct nilfs_cpstat - checkpoint statistics |
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* @cs_cno: checkpoint number |
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* @cs_ncps: number of checkpoints |
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* @cs_nsss: number of snapshots |
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*/ |
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struct nilfs_cpstat { |
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__u64 cs_cno; |
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__u64 cs_ncps; |
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__u64 cs_nsss; |
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}; |
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/** |
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* struct nilfs_sustat - segment usage statistics |
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* @ss_nsegs: number of segments |
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* @ss_ncleansegs: number of clean segments |
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* @ss_ndirtysegs: number of dirty segments |
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* @ss_ctime: creation time of the last segment |
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* @ss_nongc_ctime: creation time of the last segment not for GC |
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* @ss_prot_seq: least sequence number of segments which must not be reclaimed |
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*/ |
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struct nilfs_sustat { |
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__u64 ss_nsegs; |
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__u64 ss_ncleansegs; |
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__u64 ss_ndirtysegs; |
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__u64 ss_ctime; |
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__u64 ss_nongc_ctime; |
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__u64 ss_prot_seq; |
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}; |
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/** |
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* struct nilfs_vinfo - virtual block number information |
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* @vi_vblocknr: virtual block number |
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* @vi_start: start checkpoint number (inclusive) |
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* @vi_end: end checkpoint number (exclusive) |
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* @vi_blocknr: disk block number |
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*/ |
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struct nilfs_vinfo { |
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__u64 vi_vblocknr; |
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__u64 vi_start; |
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__u64 vi_end; |
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__u64 vi_blocknr; |
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}; |
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/** |
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* struct nilfs_vdesc - descriptor of virtual block number |
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* @vd_ino: inode number |
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* @vd_cno: checkpoint number |
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* @vd_vblocknr: virtual block number |
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* @vd_period: period of checkpoint numbers |
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* @vd_blocknr: disk block number |
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* @vd_offset: logical block offset inside a file |
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* @vd_flags: flags (data or node block) |
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* @vd_pad: padding |
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*/ |
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struct nilfs_vdesc { |
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__u64 vd_ino; |
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__u64 vd_cno; |
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__u64 vd_vblocknr; |
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struct nilfs_period vd_period; |
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__u64 vd_blocknr; |
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__u64 vd_offset; |
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__u32 vd_flags; |
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__u32 vd_pad; |
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}; |
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/** |
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* struct nilfs_bdesc - descriptor of disk block number |
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* @bd_ino: inode number |
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* @bd_oblocknr: disk block address (for skipping dead blocks) |
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* @bd_blocknr: disk block address |
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* @bd_offset: logical block offset inside a file |
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* @bd_level: level in the b-tree organization |
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* @bd_pad: padding |
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*/ |
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struct nilfs_bdesc { |
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__u64 bd_ino; |
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__u64 bd_oblocknr; |
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__u64 bd_blocknr; |
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__u64 bd_offset; |
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__u32 bd_level; |
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__u32 bd_pad; |
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}; |
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#define NILFS_IOCTL_IDENT 'n' |
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#define NILFS_IOCTL_CHANGE_CPMODE \ |
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_IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode) |
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#define NILFS_IOCTL_DELETE_CHECKPOINT \ |
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_IOW(NILFS_IOCTL_IDENT, 0x81, __u64) |
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#define NILFS_IOCTL_GET_CPINFO \ |
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_IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv) |
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#define NILFS_IOCTL_GET_CPSTAT \ |
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_IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat) |
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#define NILFS_IOCTL_GET_SUINFO \ |
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_IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv) |
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#define NILFS_IOCTL_GET_SUSTAT \ |
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_IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat) |
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#define NILFS_IOCTL_GET_VINFO \ |
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_IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv) |
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#define NILFS_IOCTL_GET_BDESCS \ |
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_IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv) |
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#define NILFS_IOCTL_CLEAN_SEGMENTS \ |
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_IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5]) |
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#define NILFS_IOCTL_SYNC \ |
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_IOR(NILFS_IOCTL_IDENT, 0x8A, __u64) |
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#define NILFS_IOCTL_RESIZE \ |
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_IOW(NILFS_IOCTL_IDENT, 0x8B, __u64) |
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#define NILFS_IOCTL_SET_ALLOC_RANGE \ |
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_IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2]) |
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#define NILFS_IOCTL_SET_SUINFO \ |
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_IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv) |
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#endif /* _LINUX_NILFS2_API_H */
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