the_nilfs.h (1cc26bada9f6807814806db2f0d78792eecdac71) the_nilfs.h (3b2ce58b0f3c1633750529713be0e467282abd78)
1/*
2 * the_nilfs.h - the_nilfs shared structure.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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67 * @ns_prev_seq: base sequence number used to decide if advance log cursor
68 * @ns_segctor_sem: segment constructor semaphore
69 * @ns_dat: DAT file inode
70 * @ns_cpfile: checkpoint file inode
71 * @ns_sufile: segusage file inode
72 * @ns_cptree: rb-tree of all mounted checkpoints (nilfs_root)
73 * @ns_cptree_lock: lock protecting @ns_cptree
74 * @ns_gc_inodes: dummy inodes to keep live blocks
1/*
2 * the_nilfs.h - the_nilfs shared structure.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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67 * @ns_prev_seq: base sequence number used to decide if advance log cursor
68 * @ns_segctor_sem: segment constructor semaphore
69 * @ns_dat: DAT file inode
70 * @ns_cpfile: checkpoint file inode
71 * @ns_sufile: segusage file inode
72 * @ns_cptree: rb-tree of all mounted checkpoints (nilfs_root)
73 * @ns_cptree_lock: lock protecting @ns_cptree
74 * @ns_gc_inodes: dummy inodes to keep live blocks
75 * @ns_mount_opt: mount options
75 * @ns_blocksize_bits: bit length of block size
76 * @ns_blocksize: block size
77 * @ns_nsegments: number of segments in filesystem
78 * @ns_blocks_per_segment: number of blocks per segment
79 * @ns_r_segments_percentage: reserved segments percentage
80 * @ns_nrsvsegs: number of reserved segments
81 * @ns_first_data_block: block number of first data block
82 * @ns_inode_size: size of on-disk inode

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143
144 /* Checkpoint tree */
145 struct rb_root ns_cptree;
146 spinlock_t ns_cptree_lock;
147
148 /* GC inode list */
149 struct list_head ns_gc_inodes;
150
76 * @ns_blocksize_bits: bit length of block size
77 * @ns_blocksize: block size
78 * @ns_nsegments: number of segments in filesystem
79 * @ns_blocks_per_segment: number of blocks per segment
80 * @ns_r_segments_percentage: reserved segments percentage
81 * @ns_nrsvsegs: number of reserved segments
82 * @ns_first_data_block: block number of first data block
83 * @ns_inode_size: size of on-disk inode

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144
145 /* Checkpoint tree */
146 struct rb_root ns_cptree;
147 spinlock_t ns_cptree_lock;
148
149 /* GC inode list */
150 struct list_head ns_gc_inodes;
151
152 /* Mount options */
153 unsigned long ns_mount_opt;
154
151 /* Disk layout information (static) */
152 unsigned int ns_blocksize_bits;
153 unsigned int ns_blocksize;
154 unsigned long ns_nsegments;
155 unsigned long ns_blocks_per_segment;
156 unsigned long ns_r_segments_percentage;
157 unsigned long ns_nrsvsegs;
158 unsigned long ns_first_data_block;

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175 return test_bit(THE_NILFS_##bit, &(nilfs)->ns_flags); \
176}
177
178THE_NILFS_FNS(INIT, init)
179THE_NILFS_FNS(DISCONTINUED, discontinued)
180THE_NILFS_FNS(GC_RUNNING, gc_running)
181THE_NILFS_FNS(SB_DIRTY, sb_dirty)
182
155 /* Disk layout information (static) */
156 unsigned int ns_blocksize_bits;
157 unsigned int ns_blocksize;
158 unsigned long ns_nsegments;
159 unsigned long ns_blocks_per_segment;
160 unsigned long ns_r_segments_percentage;
161 unsigned long ns_nrsvsegs;
162 unsigned long ns_first_data_block;

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179 return test_bit(THE_NILFS_##bit, &(nilfs)->ns_flags); \
180}
181
182THE_NILFS_FNS(INIT, init)
183THE_NILFS_FNS(DISCONTINUED, discontinued)
184THE_NILFS_FNS(GC_RUNNING, gc_running)
185THE_NILFS_FNS(SB_DIRTY, sb_dirty)
186
187/*
188 * Mount option operations
189 */
190#define nilfs_clear_opt(nilfs, opt) \
191 do { (nilfs)->ns_mount_opt &= ~NILFS_MOUNT_##opt; } while (0)
192#define nilfs_set_opt(nilfs, opt) \
193 do { (nilfs)->ns_mount_opt |= NILFS_MOUNT_##opt; } while (0)
194#define nilfs_test_opt(nilfs, opt) ((nilfs)->ns_mount_opt & NILFS_MOUNT_##opt)
195#define nilfs_write_opt(nilfs, mask, opt) \
196 do { (nilfs)->ns_mount_opt = \
197 (((nilfs)->ns_mount_opt & ~NILFS_MOUNT_##mask) | \
198 NILFS_MOUNT_##opt); \
199 } while (0)
200
183/**
184 * struct nilfs_root - nilfs root object
185 * @cno: checkpoint number
186 * @rb_node: red-black tree node
187 * @count: refcount of this structure
188 * @nilfs: nilfs object
189 * @ifile: inode file
190 * @root: root inode

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202 * struct nilfs_root - nilfs root object
203 * @cno: checkpoint number
204 * @rb_node: red-black tree node
205 * @count: refcount of this structure
206 * @nilfs: nilfs object
207 * @ifile: inode file
208 * @root: root inode

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