2 * nilfs.h - NILFS local header file.
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
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
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Written by Koji Sato <koji@osrg.net>
21 * Ryusuke Konishi <ryusuke@osrg.net>
27 #include <linux/kernel.h>
28 #include <linux/buffer_head.h>
29 #include <linux/spinlock.h>
30 #include <linux/blkdev.h>
31 #include <linux/nilfs2_fs.h>
32 #include "the_nilfs.h"
36 * nilfs inode data in memory
38 struct nilfs_inode_info {
40 unsigned long i_state; /* Dynamic state flags */
41 struct nilfs_bmap *i_bmap;
42 struct nilfs_bmap i_bmap_data;
43 __u64 i_xattr; /* sector_t ??? */
44 __u32 i_dir_start_lookup;
45 __u64 i_cno; /* check point number for GC inode */
46 struct address_space i_btnode_cache;
47 struct list_head i_dirty; /* List for connecting dirty files */
49 #ifdef CONFIG_NILFS_XATTR
51 * Extended attributes can be read independently of the main file
52 * data. Taking i_sem even when reading would cause contention
53 * between readers of EAs and writers of regular file data, so
54 * instead we synchronize on xattr_sem when reading or changing
57 struct rw_semaphore xattr_sem;
59 struct buffer_head *i_bh; /* i_bh contains a new or dirty
61 struct nilfs_root *i_root;
62 struct inode vfs_inode;
65 static inline struct nilfs_inode_info *NILFS_I(const struct inode *inode)
67 return container_of(inode, struct nilfs_inode_info, vfs_inode);
70 static inline struct nilfs_inode_info *
71 NILFS_BMAP_I(const struct nilfs_bmap *bmap)
73 return container_of(bmap, struct nilfs_inode_info, i_bmap_data);
76 static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
78 struct nilfs_inode_info *ii =
79 container_of(btnc, struct nilfs_inode_info, i_btnode_cache);
80 return &ii->vfs_inode;
84 * Dynamic state flags of NILFS on-memory inode (i_state)
87 NILFS_I_NEW = 0, /* Inode is newly created */
88 NILFS_I_DIRTY, /* The file is dirty */
89 NILFS_I_QUEUED, /* inode is in dirty_files list */
90 NILFS_I_BUSY, /* inode is grabbed by a segment
92 NILFS_I_COLLECTED, /* All dirty blocks are collected */
93 NILFS_I_UPDATED, /* The file has been written back */
94 NILFS_I_INODE_DIRTY, /* write_inode is requested */
95 NILFS_I_BMAP, /* has bmap and btnode_cache */
96 NILFS_I_GCINODE, /* inode for GC, on memory only */
100 * commit flags for nilfs_commit_super and nilfs_sync_super
103 NILFS_SB_COMMIT = 0, /* Commit a super block alternately */
104 NILFS_SB_COMMIT_ALL /* Commit both super blocks */
108 * Macros to check inode numbers
110 #define NILFS_MDT_INO_BITS \
111 ((unsigned int)(1 << NILFS_DAT_INO | 1 << NILFS_CPFILE_INO | \
112 1 << NILFS_SUFILE_INO | 1 << NILFS_IFILE_INO | \
113 1 << NILFS_ATIME_INO | 1 << NILFS_SKETCH_INO))
115 #define NILFS_SYS_INO_BITS \
116 ((unsigned int)(1 << NILFS_ROOT_INO) | NILFS_MDT_INO_BITS)
118 #define NILFS_FIRST_INO(sb) (((struct the_nilfs *)sb->s_fs_info)->ns_first_ino)
120 #define NILFS_MDT_INODE(sb, ino) \
121 ((ino) < NILFS_FIRST_INO(sb) && (NILFS_MDT_INO_BITS & (1 << (ino))))
122 #define NILFS_VALID_INODE(sb, ino) \
123 ((ino) >= NILFS_FIRST_INO(sb) || (NILFS_SYS_INO_BITS & (1 << (ino))))
126 * struct nilfs_transaction_info: context information for synchronization
127 * @ti_magic: Magic number
128 * @ti_save: Backup of journal_info field of task_struct
130 * @ti_count: Nest level
132 struct nilfs_transaction_info {
135 /* This should never used. If this happens,
136 one of other filesystems has a bug. */
137 unsigned short ti_flags;
138 unsigned short ti_count;
142 #define NILFS_TI_MAGIC 0xd9e392fb
145 #define NILFS_TI_DYNAMIC_ALLOC 0x0001 /* Allocated from slab */
146 #define NILFS_TI_SYNC 0x0002 /* Force to construct segment at the
147 end of transaction. */
148 #define NILFS_TI_GC 0x0004 /* GC context */
149 #define NILFS_TI_COMMIT 0x0008 /* Change happened or not */
150 #define NILFS_TI_WRITER 0x0010 /* Constructor context */
153 int nilfs_transaction_begin(struct super_block *,
154 struct nilfs_transaction_info *, int);
155 int nilfs_transaction_commit(struct super_block *);
156 void nilfs_transaction_abort(struct super_block *);
158 static inline void nilfs_set_transaction_flag(unsigned int flag)
160 struct nilfs_transaction_info *ti = current->journal_info;
162 ti->ti_flags |= flag;
165 static inline int nilfs_test_transaction_flag(unsigned int flag)
167 struct nilfs_transaction_info *ti = current->journal_info;
169 if (ti == NULL || ti->ti_magic != NILFS_TI_MAGIC)
171 return !!(ti->ti_flags & flag);
174 static inline int nilfs_doing_gc(void)
176 return nilfs_test_transaction_flag(NILFS_TI_GC);
179 static inline int nilfs_doing_construction(void)
181 return nilfs_test_transaction_flag(NILFS_TI_WRITER);
187 #ifdef CONFIG_NILFS_POSIX_ACL
188 #error "NILFS: not yet supported POSIX ACL"
189 extern int nilfs_acl_chmod(struct inode *);
190 extern int nilfs_init_acl(struct inode *, struct inode *);
192 static inline int nilfs_acl_chmod(struct inode *inode)
197 static inline int nilfs_init_acl(struct inode *inode, struct inode *dir)
199 inode->i_mode &= ~current_umask();
204 #define NILFS_ATIME_DISABLE
206 /* Flags that should be inherited by new inodes from their parent. */
207 #define NILFS_FL_INHERITED \
208 (FS_SECRM_FL | FS_UNRM_FL | FS_COMPR_FL | FS_SYNC_FL | \
209 FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NODUMP_FL | FS_NOATIME_FL |\
210 FS_COMPRBLK_FL | FS_NOCOMP_FL | FS_NOTAIL_FL | FS_DIRSYNC_FL)
212 /* Mask out flags that are inappropriate for the given type of inode. */
213 static inline __u32 nilfs_mask_flags(umode_t mode, __u32 flags)
217 else if (S_ISREG(mode))
218 return flags & ~(FS_DIRSYNC_FL | FS_TOPDIR_FL);
220 return flags & (FS_NODUMP_FL | FS_NOATIME_FL);
224 extern int nilfs_add_link(struct dentry *, struct inode *);
225 extern ino_t nilfs_inode_by_name(struct inode *, const struct qstr *);
226 extern int nilfs_make_empty(struct inode *, struct inode *);
227 extern struct nilfs_dir_entry *
228 nilfs_find_entry(struct inode *, const struct qstr *, struct page **);
229 extern int nilfs_delete_entry(struct nilfs_dir_entry *, struct page *);
230 extern int nilfs_empty_dir(struct inode *);
231 extern struct nilfs_dir_entry *nilfs_dotdot(struct inode *, struct page **);
232 extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
233 struct page *, struct inode *);
236 extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
239 long nilfs_ioctl(struct file *, unsigned int, unsigned long);
240 long nilfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
241 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,
245 void nilfs_inode_add_blocks(struct inode *inode, int n);
246 void nilfs_inode_sub_blocks(struct inode *inode, int n);
247 extern struct inode *nilfs_new_inode(struct inode *, int);
248 extern void nilfs_free_inode(struct inode *);
249 extern int nilfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
250 extern void nilfs_set_inode_flags(struct inode *);
251 extern int nilfs_read_inode_common(struct inode *, struct nilfs_inode *);
252 extern void nilfs_write_inode_common(struct inode *, struct nilfs_inode *, int);
253 struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root,
255 struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root,
257 struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root,
259 extern struct inode *nilfs_iget_for_gc(struct super_block *sb,
260 unsigned long ino, __u64 cno);
261 extern void nilfs_update_inode(struct inode *, struct buffer_head *);
262 extern void nilfs_truncate(struct inode *);
263 extern void nilfs_evict_inode(struct inode *);
264 extern int nilfs_setattr(struct dentry *, struct iattr *);
265 int nilfs_permission(struct inode *inode, int mask);
266 int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh);
267 extern int nilfs_inode_dirty(struct inode *);
268 int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty);
269 extern int nilfs_mark_inode_dirty(struct inode *);
270 extern void nilfs_dirty_inode(struct inode *, int flags);
271 int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
272 __u64 start, __u64 len);
275 extern struct inode *nilfs_alloc_inode(struct super_block *);
276 extern void nilfs_destroy_inode(struct inode *);
277 extern __printf(3, 4)
278 void nilfs_error(struct super_block *, const char *, const char *, ...);
279 extern __printf(3, 4)
280 void nilfs_warning(struct super_block *, const char *, const char *, ...);
281 extern struct nilfs_super_block *
282 nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
283 extern int nilfs_store_magic_and_option(struct super_block *,
284 struct nilfs_super_block *, char *);
285 extern int nilfs_check_feature_compatibility(struct super_block *,
286 struct nilfs_super_block *);
287 extern void nilfs_set_log_cursor(struct nilfs_super_block *,
289 struct nilfs_super_block **nilfs_prepare_super(struct super_block *sb,
291 int nilfs_commit_super(struct super_block *sb, int flag);
292 int nilfs_cleanup_super(struct super_block *sb);
293 int nilfs_resize_fs(struct super_block *sb, __u64 newsize);
294 int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
295 struct nilfs_root **root);
296 int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno);
299 int nilfs_gccache_submit_read_data(struct inode *, sector_t, sector_t, __u64,
300 struct buffer_head **);
301 int nilfs_gccache_submit_read_node(struct inode *, sector_t, __u64,
302 struct buffer_head **);
303 int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
304 int nilfs_init_gcinode(struct inode *inode);
305 void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
308 * Inodes and files operations
310 extern const struct file_operations nilfs_dir_operations;
311 extern const struct inode_operations nilfs_file_inode_operations;
312 extern const struct file_operations nilfs_file_operations;
313 extern const struct address_space_operations nilfs_aops;
314 extern const struct inode_operations nilfs_dir_inode_operations;
315 extern const struct inode_operations nilfs_special_inode_operations;
316 extern const struct inode_operations nilfs_symlink_inode_operations;
321 extern struct file_system_type nilfs_fs_type;
324 #endif /* _NILFS_H */