2 * linux/fs/affs/inode.c
4 * (c) 1996 Hans-Joachim Widmaier - Rewritten
6 * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
8 * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
10 * (C) 1991 Linus Torvalds - minix filesystem
12 #include <linux/sched.h>
13 #include <linux/cred.h>
14 #include <linux/gfp.h>
17 struct inode *affs_iget(struct super_block *sb, unsigned long ino)
19 struct affs_sb_info *sbi = AFFS_SB(sb);
20 struct buffer_head *bh;
21 struct affs_tail *tail;
28 inode = iget_locked(sb, ino);
30 return ERR_PTR(-ENOMEM);
31 if (!(inode->i_state & I_NEW))
34 pr_debug("affs_iget(%lu)\n", inode->i_ino);
37 bh = affs_bread(sb, block);
39 affs_warning(sb, "read_inode", "Cannot read block %d", block);
42 if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
43 affs_warning(sb,"read_inode",
44 "Checksum or type (ptype=%d) error on inode %d",
45 AFFS_HEAD(bh)->ptype, block);
49 tail = AFFS_TAIL(sb, bh);
50 prot = be32_to_cpu(tail->protect);
55 AFFS_I(inode)->i_extcnt = 1;
56 AFFS_I(inode)->i_ext_last = ~1;
57 AFFS_I(inode)->i_protect = prot;
58 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
59 AFFS_I(inode)->i_blkcnt = 0;
60 AFFS_I(inode)->i_lc = NULL;
61 AFFS_I(inode)->i_lc_size = 0;
62 AFFS_I(inode)->i_lc_shift = 0;
63 AFFS_I(inode)->i_lc_mask = 0;
64 AFFS_I(inode)->i_ac = NULL;
65 AFFS_I(inode)->i_ext_bh = NULL;
66 AFFS_I(inode)->mmu_private = 0;
67 AFFS_I(inode)->i_lastalloc = 0;
68 AFFS_I(inode)->i_pa_cnt = 0;
70 if (affs_test_opt(sbi->s_flags, SF_SETMODE))
71 inode->i_mode = sbi->s_mode;
73 inode->i_mode = affs_prot_to_mode(prot);
75 id = be16_to_cpu(tail->uid);
76 if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETUID))
77 inode->i_uid = sbi->s_uid;
78 else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
79 i_uid_write(inode, 0);
81 i_uid_write(inode, id);
83 id = be16_to_cpu(tail->gid);
84 if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETGID))
85 inode->i_gid = sbi->s_gid;
86 else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
87 i_gid_write(inode, 0);
89 i_gid_write(inode, id);
91 switch (be32_to_cpu(tail->stype)) {
93 inode->i_uid = sbi->s_uid;
94 inode->i_gid = sbi->s_gid;
97 if (be32_to_cpu(tail->stype) == ST_USERDIR ||
98 affs_test_opt(sbi->s_flags, SF_SETMODE)) {
99 if (inode->i_mode & S_IRUSR)
100 inode->i_mode |= S_IXUSR;
101 if (inode->i_mode & S_IRGRP)
102 inode->i_mode |= S_IXGRP;
103 if (inode->i_mode & S_IROTH)
104 inode->i_mode |= S_IXOTH;
105 inode->i_mode |= S_IFDIR;
107 inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
108 /* Maybe it should be controlled by mount parameter? */
109 //inode->i_mode |= S_ISVTX;
110 inode->i_op = &affs_dir_inode_operations;
111 inode->i_fop = &affs_dir_operations;
115 affs_warning(sb, "read_inode", "inode is LINKDIR");
118 inode->i_mode |= S_IFDIR;
119 /* ... and leave ->i_op and ->i_fop pointing to empty */
123 affs_warning(sb, "read_inode", "inode is LINKFILE");
126 size = be32_to_cpu(tail->size);
127 inode->i_mode |= S_IFREG;
128 AFFS_I(inode)->mmu_private = inode->i_size = size;
130 AFFS_I(inode)->i_blkcnt = (size - 1) /
131 sbi->s_data_blksize + 1;
132 AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
135 if (tail->link_chain)
137 inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
138 &affs_aops_ofs : &affs_aops;
139 inode->i_op = &affs_file_inode_operations;
140 inode->i_fop = &affs_file_operations;
143 inode->i_mode |= S_IFLNK;
144 inode_nohighmem(inode);
145 inode->i_op = &affs_symlink_inode_operations;
146 inode->i_data.a_ops = &affs_symlink_aops;
150 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
151 = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
152 be32_to_cpu(tail->change.mins) * 60 +
153 be32_to_cpu(tail->change.ticks) / 50 +
154 ((8 * 365 + 2) * 24 * 60 * 60)) +
155 sys_tz.tz_minuteswest * 60;
156 inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
158 unlock_new_inode(inode);
164 return ERR_PTR(-EIO);
168 affs_write_inode(struct inode *inode, struct writeback_control *wbc)
170 struct super_block *sb = inode->i_sb;
171 struct buffer_head *bh;
172 struct affs_tail *tail;
176 pr_debug("write_inode(%lu)\n", inode->i_ino);
179 // possibly free block
181 bh = affs_bread(sb, inode->i_ino);
183 affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
186 tail = AFFS_TAIL(sb, bh);
187 if (tail->stype == cpu_to_be32(ST_ROOT)) {
188 affs_secs_to_datestamp(inode->i_mtime.tv_sec,
189 &AFFS_ROOT_TAIL(sb, bh)->root_change);
191 tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
192 tail->size = cpu_to_be32(inode->i_size);
193 affs_secs_to_datestamp(inode->i_mtime.tv_sec, &tail->change);
194 if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
195 uid = i_uid_read(inode);
196 gid = i_gid_read(inode);
197 if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
198 if (uid == 0 || uid == 0xFFFF)
200 if (gid == 0 || gid == 0xFFFF)
203 if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
204 tail->uid = cpu_to_be16(uid);
205 if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
206 tail->gid = cpu_to_be16(gid);
209 affs_fix_checksum(sb, bh);
210 mark_buffer_dirty_inode(bh, inode);
212 affs_free_prealloc(inode);
217 affs_notify_change(struct dentry *dentry, struct iattr *attr)
219 struct inode *inode = d_inode(dentry);
222 pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
224 error = setattr_prepare(dentry, attr);
228 if (((attr->ia_valid & ATTR_UID) &&
229 affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) ||
230 ((attr->ia_valid & ATTR_GID) &&
231 affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) ||
232 ((attr->ia_valid & ATTR_MODE) &&
233 (AFFS_SB(inode->i_sb)->s_flags &
234 (AFFS_MOUNT_SF_SETMODE | AFFS_MOUNT_SF_IMMUTABLE)))) {
235 if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
240 if ((attr->ia_valid & ATTR_SIZE) &&
241 attr->ia_size != i_size_read(inode)) {
242 error = inode_newsize_ok(inode, attr->ia_size);
246 truncate_setsize(inode, attr->ia_size);
247 affs_truncate(inode);
250 setattr_copy(inode, attr);
251 mark_inode_dirty(inode);
253 if (attr->ia_valid & ATTR_MODE)
254 affs_mode_to_prot(inode);
260 affs_evict_inode(struct inode *inode)
262 unsigned long cache_page;
263 pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
264 inode->i_ino, inode->i_nlink);
265 truncate_inode_pages_final(&inode->i_data);
267 if (!inode->i_nlink) {
269 affs_truncate(inode);
272 invalidate_inode_buffers(inode);
274 affs_free_prealloc(inode);
275 cache_page = (unsigned long)AFFS_I(inode)->i_lc;
277 pr_debug("freeing ext cache\n");
278 AFFS_I(inode)->i_lc = NULL;
279 AFFS_I(inode)->i_ac = NULL;
280 free_page(cache_page);
282 affs_brelse(AFFS_I(inode)->i_ext_bh);
283 AFFS_I(inode)->i_ext_last = ~1;
284 AFFS_I(inode)->i_ext_bh = NULL;
287 affs_free_block(inode->i_sb, inode->i_ino);
291 affs_new_inode(struct inode *dir)
293 struct super_block *sb = dir->i_sb;
296 struct buffer_head *bh;
298 if (!(inode = new_inode(sb)))
301 if (!(block = affs_alloc_block(dir, dir->i_ino)))
304 bh = affs_getzeroblk(sb, block);
307 mark_buffer_dirty_inode(bh, inode);
310 inode->i_uid = current_fsuid();
311 inode->i_gid = current_fsgid();
312 inode->i_ino = block;
314 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
315 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
316 AFFS_I(inode)->i_blkcnt = 0;
317 AFFS_I(inode)->i_lc = NULL;
318 AFFS_I(inode)->i_lc_size = 0;
319 AFFS_I(inode)->i_lc_shift = 0;
320 AFFS_I(inode)->i_lc_mask = 0;
321 AFFS_I(inode)->i_ac = NULL;
322 AFFS_I(inode)->i_ext_bh = NULL;
323 AFFS_I(inode)->mmu_private = 0;
324 AFFS_I(inode)->i_protect = 0;
325 AFFS_I(inode)->i_lastalloc = 0;
326 AFFS_I(inode)->i_pa_cnt = 0;
327 AFFS_I(inode)->i_extcnt = 1;
328 AFFS_I(inode)->i_ext_last = ~1;
330 insert_inode_hash(inode);
335 affs_free_block(sb, block);
343 * Add an entry to a directory. Create the header block
344 * and insert it into the hash table.
348 affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
350 struct super_block *sb = dir->i_sb;
351 struct buffer_head *inode_bh = NULL;
352 struct buffer_head *bh;
356 pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
357 dir->i_ino, inode->i_ino, dentry, type);
360 bh = affs_bread(sb, inode->i_ino);
364 affs_lock_link(inode);
369 block = affs_alloc_block(dir, dir->i_ino);
374 bh = affs_getzeroblk(sb, block);
382 AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
383 AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
384 affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
385 AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
386 AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
390 chain = AFFS_TAIL(sb, inode_bh)->link_chain;
391 AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
392 AFFS_TAIL(sb, bh)->link_chain = chain;
393 AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
394 affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
395 mark_buffer_dirty_inode(inode_bh, inode);
399 affs_fix_checksum(sb, bh);
400 mark_buffer_dirty_inode(bh, inode);
401 dentry->d_fsdata = (void *)(long)bh->b_blocknr;
404 retval = affs_insert_hash(dir, bh);
405 mark_buffer_dirty_inode(bh, inode);
406 affs_unlock_dir(dir);
407 affs_unlock_link(inode);
409 d_instantiate(dentry, inode);
411 affs_brelse(inode_bh);
416 affs_free_block(sb, block);
417 affs_unlock_link(inode);