uapi/linux/nilfs2_api.h

1 /* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
3  * nilfs2_api.h - NILFS2 user space API
5  * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
20  * struct nilfs_cpinfo - checkpoint information
23  * @ci_cno: checkpoint number
25  * @ci_nblk_inc: number of blocks incremented by this checkpoint
28  * @ci_next: next checkpoint number in snapshot list
53 	return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag));	\
61  * nilfs_suinfo - segment usage information
63  * @sui_nblocks: number of written blocks in segment
83 	return si->sui_flags & (1UL << NILFS_SUINFO_##flag);		\
92 	return !si->sui_flags;  in NILFS_SUINFO_FNS()
96  * nilfs_suinfo_update - segment usage information update
97  * @sup_segnum: segment number
120 	sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag;		\
125 	sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag);		\
130 	return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
143  * struct nilfs_cpmode - change checkpoint mode structure
144  * @cm_cno: checkpoint number
155  * struct nilfs_argv - argument vector
157  * @v_nmembs: number of members in data array
160  * @v_index: start number of target data items
164 	__u32 v_nmembs;	/* number of members */
171  * struct nilfs_period - period of checkpoint numbers
172  * @p_start: start checkpoint number (inclusive)
173  * @p_end: end checkpoint number (exclusive)
181  * struct nilfs_cpstat - checkpoint statistics
182  * @cs_cno: checkpoint number
183  * @cs_ncps: number of checkpoints
184  * @cs_nsss: number of snapshots
193  * struct nilfs_sustat - segment usage statistics
194  * @ss_nsegs: number of segments
195  * @ss_ncleansegs: number of clean segments
196  * @ss_ndirtysegs: number of dirty segments
199  * @ss_prot_seq: least sequence number of segments which must not be reclaimed
211  * struct nilfs_vinfo - virtual block number information
212  * @vi_vblocknr: virtual block number
213  * @vi_start: start checkpoint number (inclusive)
214  * @vi_end: end checkpoint number (exclusive)
215  * @vi_blocknr: disk block number
225  * struct nilfs_vdesc - descriptor of virtual block number
226  * @vd_ino: inode number
227  * @vd_cno: checkpoint number
228  * @vd_vblocknr: virtual block number
230  * @vd_blocknr: disk block number
231  * @vd_offset: logical block offset inside a file
232  * @vd_flags: flags (data or node block)
247  * struct nilfs_bdesc - descriptor of disk block number
248  * @bd_ino: inode number
249  * @bd_oblocknr: disk block address (for skipping dead blocks)
250  * @bd_blocknr: disk block address
251  * @bd_offset: logical block offset inside a file
252  * @bd_level: level in the b-tree organization