~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/affs/affs.h

Version: ~ [ linux-5.8-rc4 ] ~ [ linux-5.7.7 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.50 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.131 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.187 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.229 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.229 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #include <linux/types.h>
  2 #include <linux/fs.h>
  3 #include <linux/buffer_head.h>
  4 #include <linux/amigaffs.h>
  5 #include <linux/mutex.h>
  6 #include <linux/workqueue.h>
  7 
  8 /* AmigaOS allows file names with up to 30 characters length.
  9  * Names longer than that will be silently truncated. If you
 10  * want to disallow this, comment out the following #define.
 11  * Creating filesystem objects with longer names will then
 12  * result in an error (ENAMETOOLONG).
 13  */
 14 /*#define AFFS_NO_TRUNCATE */
 15 
 16 /* Ugly macros make the code more pretty. */
 17 
 18 #define GET_END_PTR(st,p,sz)             ((st *)((char *)(p)+((sz)-sizeof(st))))
 19 #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
 20 #define AFFS_BLOCK(sb, bh, blk)         (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
 21 
 22 #define AFFS_HEAD(bh)           ((struct affs_head *)(bh)->b_data)
 23 #define AFFS_TAIL(sb, bh)       ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
 24 #define AFFS_ROOT_HEAD(bh)      ((struct affs_root_head *)(bh)->b_data)
 25 #define AFFS_ROOT_TAIL(sb, bh)  ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
 26 #define AFFS_DATA_HEAD(bh)      ((struct affs_data_head *)(bh)->b_data)
 27 #define AFFS_DATA(bh)           (((struct affs_data_head *)(bh)->b_data)->data)
 28 
 29 #define AFFS_CACHE_SIZE         PAGE_SIZE
 30 
 31 #define AFFS_MAX_PREALLOC       32
 32 #define AFFS_LC_SIZE            (AFFS_CACHE_SIZE/sizeof(u32)/2)
 33 #define AFFS_AC_SIZE            (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
 34 #define AFFS_AC_MASK            (AFFS_AC_SIZE-1)
 35 
 36 struct affs_ext_key {
 37         u32     ext;                            /* idx of the extended block */
 38         u32     key;                            /* block number */
 39 };
 40 
 41 /*
 42  * affs fs inode data in memory
 43  */
 44 struct affs_inode_info {
 45         atomic_t i_opencnt;
 46         struct semaphore i_link_lock;           /* Protects internal inode access. */
 47         struct semaphore i_ext_lock;            /* Protects internal inode access. */
 48 #define i_hash_lock i_ext_lock
 49         u32      i_blkcnt;                      /* block count */
 50         u32      i_extcnt;                      /* extended block count */
 51         u32     *i_lc;                          /* linear cache of extended blocks */
 52         u32      i_lc_size;
 53         u32      i_lc_shift;
 54         u32      i_lc_mask;
 55         struct affs_ext_key *i_ac;              /* associative cache of extended blocks */
 56         u32      i_ext_last;                    /* last accessed extended block */
 57         struct buffer_head *i_ext_bh;           /* bh of last extended block */
 58         loff_t   mmu_private;
 59         u32      i_protect;                     /* unused attribute bits */
 60         u32      i_lastalloc;                   /* last allocated block */
 61         int      i_pa_cnt;                      /* number of preallocated blocks */
 62         struct inode vfs_inode;
 63 };
 64 
 65 /* short cut to get to the affs specific inode data */
 66 static inline struct affs_inode_info *AFFS_I(struct inode *inode)
 67 {
 68         return list_entry(inode, struct affs_inode_info, vfs_inode);
 69 }
 70 
 71 /*
 72  * super-block data in memory
 73  *
 74  * Block numbers are adjusted for their actual size
 75  *
 76  */
 77 
 78 struct affs_bm_info {
 79         u32 bm_key;                     /* Disk block number */
 80         u32 bm_free;                    /* Free blocks in here */
 81 };
 82 
 83 struct affs_sb_info {
 84         int s_partition_size;           /* Partition size in blocks. */
 85         int s_reserved;                 /* Number of reserved blocks. */
 86         //u32 s_blksize;                        /* Initial device blksize */
 87         u32 s_data_blksize;             /* size of the data block w/o header */
 88         u32 s_root_block;               /* FFS root block number. */
 89         int s_hashsize;                 /* Size of hash table. */
 90         unsigned long s_flags;          /* See below. */
 91         kuid_t s_uid;                   /* uid to override */
 92         kgid_t s_gid;                   /* gid to override */
 93         umode_t s_mode;                 /* mode to override */
 94         struct buffer_head *s_root_bh;  /* Cached root block. */
 95         struct mutex s_bmlock;          /* Protects bitmap access. */
 96         struct affs_bm_info *s_bitmap;  /* Bitmap infos. */
 97         u32 s_bmap_count;               /* # of bitmap blocks. */
 98         u32 s_bmap_bits;                /* # of bits in one bitmap blocks */
 99         u32 s_last_bmap;
100         struct buffer_head *s_bmap_bh;
101         char *s_prefix;                 /* Prefix for volumes and assigns. */
102         char s_volume[32];              /* Volume prefix for absolute symlinks. */
103         spinlock_t symlink_lock;        /* protects the previous two */
104         struct super_block *sb;         /* the VFS superblock object */
105         int work_queued;                /* non-zero delayed work is queued */
106         struct delayed_work sb_work;    /* superblock flush delayed work */
107         spinlock_t work_lock;           /* protects sb_work and work_queued */
108 };
109 
110 #define SF_INTL         0x0001          /* International filesystem. */
111 #define SF_BM_VALID     0x0002          /* Bitmap is valid. */
112 #define SF_IMMUTABLE    0x0004          /* Protection bits cannot be changed */
113 #define SF_QUIET        0x0008          /* chmod errors will be not reported */
114 #define SF_SETUID       0x0010          /* Ignore Amiga uid */
115 #define SF_SETGID       0x0020          /* Ignore Amiga gid */
116 #define SF_SETMODE      0x0040          /* Ignore Amiga protection bits */
117 #define SF_MUFS         0x0100          /* Use MUFS uid/gid mapping */
118 #define SF_OFS          0x0200          /* Old filesystem */
119 #define SF_PREFIX       0x0400          /* Buffer for prefix is allocated */
120 #define SF_VERBOSE      0x0800          /* Talk about fs when mounting */
121 
122 /* short cut to get to the affs specific sb data */
123 static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
124 {
125         return sb->s_fs_info;
126 }
127 
128 void affs_mark_sb_dirty(struct super_block *sb);
129 
130 /* amigaffs.c */
131 
132 extern int      affs_insert_hash(struct inode *inode, struct buffer_head *bh);
133 extern int      affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
134 extern int      affs_remove_header(struct dentry *dentry);
135 extern u32      affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
136 extern void     affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
137 extern void     secs_to_datestamp(time_t secs, struct affs_date *ds);
138 extern umode_t  prot_to_mode(u32 prot);
139 extern void     mode_to_prot(struct inode *inode);
140 extern void     affs_error(struct super_block *sb, const char *function, const char *fmt, ...);
141 extern void     affs_warning(struct super_block *sb, const char *function, const char *fmt, ...);
142 extern int      affs_check_name(const unsigned char *name, int len);
143 extern int      affs_copy_name(unsigned char *bstr, struct dentry *dentry);
144 
145 /* bitmap. c */
146 
147 extern u32      affs_count_free_blocks(struct super_block *s);
148 extern void     affs_free_block(struct super_block *sb, u32 block);
149 extern u32      affs_alloc_block(struct inode *inode, u32 goal);
150 extern int      affs_init_bitmap(struct super_block *sb, int *flags);
151 extern void     affs_free_bitmap(struct super_block *sb);
152 
153 /* namei.c */
154 
155 extern int      affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
156 extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
157 extern int      affs_unlink(struct inode *dir, struct dentry *dentry);
158 extern int      affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
159 extern int      affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
160 extern int      affs_rmdir(struct inode *dir, struct dentry *dentry);
161 extern int      affs_link(struct dentry *olddentry, struct inode *dir,
162                           struct dentry *dentry);
163 extern int      affs_symlink(struct inode *dir, struct dentry *dentry,
164                              const char *symname);
165 extern int      affs_rename(struct inode *old_dir, struct dentry *old_dentry,
166                             struct inode *new_dir, struct dentry *new_dentry);
167 
168 /* inode.c */
169 
170 extern unsigned long             affs_parent_ino(struct inode *dir);
171 extern struct inode             *affs_new_inode(struct inode *dir);
172 extern int                       affs_notify_change(struct dentry *dentry, struct iattr *attr);
173 extern void                      affs_evict_inode(struct inode *inode);
174 extern struct inode             *affs_iget(struct super_block *sb,
175                                         unsigned long ino);
176 extern int                       affs_write_inode(struct inode *inode,
177                                         struct writeback_control *wbc);
178 extern int                       affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
179 
180 /* file.c */
181 
182 void            affs_free_prealloc(struct inode *inode);
183 extern void     affs_truncate(struct inode *);
184 int             affs_file_fsync(struct file *, loff_t, loff_t, int);
185 
186 /* dir.c */
187 
188 extern void   affs_dir_truncate(struct inode *);
189 
190 /* jump tables */
191 
192 extern const struct inode_operations     affs_file_inode_operations;
193 extern const struct inode_operations     affs_dir_inode_operations;
194 extern const struct inode_operations   affs_symlink_inode_operations;
195 extern const struct file_operations      affs_file_operations;
196 extern const struct file_operations      affs_file_operations_ofs;
197 extern const struct file_operations      affs_dir_operations;
198 extern const struct address_space_operations     affs_symlink_aops;
199 extern const struct address_space_operations     affs_aops;
200 extern const struct address_space_operations     affs_aops_ofs;
201 
202 extern const struct dentry_operations    affs_dentry_operations;
203 extern const struct dentry_operations    affs_intl_dentry_operations;
204 
205 static inline void
206 affs_set_blocksize(struct super_block *sb, int size)
207 {
208         sb_set_blocksize(sb, size);
209 }
210 static inline struct buffer_head *
211 affs_bread(struct super_block *sb, int block)
212 {
213         pr_debug("affs_bread: %d\n", block);
214         if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
215                 return sb_bread(sb, block);
216         return NULL;
217 }
218 static inline struct buffer_head *
219 affs_getblk(struct super_block *sb, int block)
220 {
221         pr_debug("affs_getblk: %d\n", block);
222         if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
223                 return sb_getblk(sb, block);
224         return NULL;
225 }
226 static inline struct buffer_head *
227 affs_getzeroblk(struct super_block *sb, int block)
228 {
229         struct buffer_head *bh;
230         pr_debug("affs_getzeroblk: %d\n", block);
231         if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
232                 bh = sb_getblk(sb, block);
233                 lock_buffer(bh);
234                 memset(bh->b_data, 0 , sb->s_blocksize);
235                 set_buffer_uptodate(bh);
236                 unlock_buffer(bh);
237                 return bh;
238         }
239         return NULL;
240 }
241 static inline struct buffer_head *
242 affs_getemptyblk(struct super_block *sb, int block)
243 {
244         struct buffer_head *bh;
245         pr_debug("affs_getemptyblk: %d\n", block);
246         if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
247                 bh = sb_getblk(sb, block);
248                 wait_on_buffer(bh);
249                 set_buffer_uptodate(bh);
250                 return bh;
251         }
252         return NULL;
253 }
254 static inline void
255 affs_brelse(struct buffer_head *bh)
256 {
257         if (bh)
258                 pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr);
259         brelse(bh);
260 }
261 
262 static inline void
263 affs_adjust_checksum(struct buffer_head *bh, u32 val)
264 {
265         u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
266         ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
267 }
268 static inline void
269 affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
270 {
271         u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
272         ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
273 }
274 
275 static inline void
276 affs_lock_link(struct inode *inode)
277 {
278         down(&AFFS_I(inode)->i_link_lock);
279 }
280 static inline void
281 affs_unlock_link(struct inode *inode)
282 {
283         up(&AFFS_I(inode)->i_link_lock);
284 }
285 static inline void
286 affs_lock_dir(struct inode *inode)
287 {
288         down(&AFFS_I(inode)->i_hash_lock);
289 }
290 static inline void
291 affs_unlock_dir(struct inode *inode)
292 {
293         up(&AFFS_I(inode)->i_hash_lock);
294 }
295 static inline void
296 affs_lock_ext(struct inode *inode)
297 {
298         down(&AFFS_I(inode)->i_ext_lock);
299 }
300 static inline void
301 affs_unlock_ext(struct inode *inode)
302 {
303         up(&AFFS_I(inode)->i_ext_lock);
304 }
305 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp