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12#include <linux/sched.h>
13#include "affs.h"
14
15extern const struct inode_operations affs_symlink_inode_operations;
16extern struct timezone sys_tz;
17
18struct inode *affs_iget(struct super_block *sb, unsigned long ino)
19{
20 struct affs_sb_info *sbi = AFFS_SB(sb);
21 struct buffer_head *bh;
22 struct affs_head *head;
23 struct affs_tail *tail;
24 struct inode *inode;
25 u32 block;
26 u32 size;
27 u32 prot;
28 u16 id;
29
30 inode = iget_locked(sb, ino);
31 if (!inode)
32 return ERR_PTR(-ENOMEM);
33 if (!(inode->i_state & I_NEW))
34 return inode;
35
36 pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
37
38 block = inode->i_ino;
39 bh = affs_bread(sb, block);
40 if (!bh) {
41 affs_warning(sb, "read_inode", "Cannot read block %d", block);
42 goto bad_inode;
43 }
44 if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
45 affs_warning(sb,"read_inode",
46 "Checksum or type (ptype=%d) error on inode %d",
47 AFFS_HEAD(bh)->ptype, block);
48 goto bad_inode;
49 }
50
51 head = AFFS_HEAD(bh);
52 tail = AFFS_TAIL(sb, bh);
53 prot = be32_to_cpu(tail->protect);
54
55 inode->i_size = 0;
56 inode->i_nlink = 1;
57 inode->i_mode = 0;
58 AFFS_I(inode)->i_extcnt = 1;
59 AFFS_I(inode)->i_ext_last = ~1;
60 AFFS_I(inode)->i_protect = prot;
61 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
62 AFFS_I(inode)->i_blkcnt = 0;
63 AFFS_I(inode)->i_lc = NULL;
64 AFFS_I(inode)->i_lc_size = 0;
65 AFFS_I(inode)->i_lc_shift = 0;
66 AFFS_I(inode)->i_lc_mask = 0;
67 AFFS_I(inode)->i_ac = NULL;
68 AFFS_I(inode)->i_ext_bh = NULL;
69 AFFS_I(inode)->mmu_private = 0;
70 AFFS_I(inode)->i_lastalloc = 0;
71 AFFS_I(inode)->i_pa_cnt = 0;
72
73 if (sbi->s_flags & SF_SETMODE)
74 inode->i_mode = sbi->s_mode;
75 else
76 inode->i_mode = prot_to_mode(prot);
77
78 id = be16_to_cpu(tail->uid);
79 if (id == 0 || sbi->s_flags & SF_SETUID)
80 inode->i_uid = sbi->s_uid;
81 else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
82 inode->i_uid = 0;
83 else
84 inode->i_uid = id;
85
86 id = be16_to_cpu(tail->gid);
87 if (id == 0 || sbi->s_flags & SF_SETGID)
88 inode->i_gid = sbi->s_gid;
89 else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
90 inode->i_gid = 0;
91 else
92 inode->i_gid = id;
93
94 switch (be32_to_cpu(tail->stype)) {
95 case ST_ROOT:
96 inode->i_uid = sbi->s_uid;
97 inode->i_gid = sbi->s_gid;
98
99 case ST_USERDIR:
100 if (be32_to_cpu(tail->stype) == ST_USERDIR ||
101 sbi->s_flags & SF_SETMODE) {
102 if (inode->i_mode & S_IRUSR)
103 inode->i_mode |= S_IXUSR;
104 if (inode->i_mode & S_IRGRP)
105 inode->i_mode |= S_IXGRP;
106 if (inode->i_mode & S_IROTH)
107 inode->i_mode |= S_IXOTH;
108 inode->i_mode |= S_IFDIR;
109 } else
110 inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
111
112
113 inode->i_op = &affs_dir_inode_operations;
114 inode->i_fop = &affs_dir_operations;
115 break;
116 case ST_LINKDIR:
117#if 0
118 affs_warning(sb, "read_inode", "inode is LINKDIR");
119 goto bad_inode;
120#else
121 inode->i_mode |= S_IFDIR;
122
123 break;
124#endif
125 case ST_LINKFILE:
126 affs_warning(sb, "read_inode", "inode is LINKFILE");
127 goto bad_inode;
128 case ST_FILE:
129 size = be32_to_cpu(tail->size);
130 inode->i_mode |= S_IFREG;
131 AFFS_I(inode)->mmu_private = inode->i_size = size;
132 if (inode->i_size) {
133 AFFS_I(inode)->i_blkcnt = (size - 1) /
134 sbi->s_data_blksize + 1;
135 AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
136 sbi->s_hashsize + 1;
137 }
138 if (tail->link_chain)
139 inode->i_nlink = 2;
140 inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
141 inode->i_op = &affs_file_inode_operations;
142 inode->i_fop = &affs_file_operations;
143 break;
144 case ST_SOFTLINK:
145 inode->i_mode |= S_IFLNK;
146 inode->i_op = &affs_symlink_inode_operations;
147 inode->i_data.a_ops = &affs_symlink_aops;
148 break;
149 }
150
151 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
152 = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
153 be32_to_cpu(tail->change.mins) * 60 +
154 be32_to_cpu(tail->change.ticks) / 50 +
155 ((8 * 365 + 2) * 24 * 60 * 60)) +
156 sys_tz.tz_minuteswest * 60;
157 inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
158 affs_brelse(bh);
159 unlock_new_inode(inode);
160 return inode;
161
162bad_inode:
163 affs_brelse(bh);
164 iget_failed(inode);
165 return ERR_PTR(-EIO);
166}
167
168int
169affs_write_inode(struct inode *inode, int unused)
170{
171 struct super_block *sb = inode->i_sb;
172 struct buffer_head *bh;
173 struct affs_tail *tail;
174 uid_t uid;
175 gid_t gid;
176
177 pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
178
179 if (!inode->i_nlink)
180
181 return 0;
182 bh = affs_bread(sb, inode->i_ino);
183 if (!bh) {
184 affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
185 return -EIO;
186 }
187 tail = AFFS_TAIL(sb, bh);
188 if (tail->stype == cpu_to_be32(ST_ROOT)) {
189 secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
190 } else {
191 tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
192 tail->size = cpu_to_be32(inode->i_size);
193 secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
194 if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
195 uid = inode->i_uid;
196 gid = inode->i_gid;
197 if (AFFS_SB(sb)->s_flags & SF_MUFS) {
198 if (inode->i_uid == 0 || inode->i_uid == 0xFFFF)
199 uid = inode->i_uid ^ ~0;
200 if (inode->i_gid == 0 || inode->i_gid == 0xFFFF)
201 gid = inode->i_gid ^ ~0;
202 }
203 if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
204 tail->uid = cpu_to_be16(uid);
205 if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
206 tail->gid = cpu_to_be16(gid);
207 }
208 }
209 affs_fix_checksum(sb, bh);
210 mark_buffer_dirty_inode(bh, inode);
211 affs_brelse(bh);
212 affs_free_prealloc(inode);
213 return 0;
214}
215
216int
217affs_notify_change(struct dentry *dentry, struct iattr *attr)
218{
219 struct inode *inode = dentry->d_inode;
220 int error;
221
222 pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
223
224 error = inode_change_ok(inode,attr);
225 if (error)
226 goto out;
227
228 if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) ||
229 ((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) ||
230 ((attr->ia_valid & ATTR_MODE) &&
231 (AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) {
232 if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
233 error = -EPERM;
234 goto out;
235 }
236
237 error = inode_setattr(inode, attr);
238 if (!error && (attr->ia_valid & ATTR_MODE))
239 mode_to_prot(inode);
240out:
241 return error;
242}
243
244void
245affs_delete_inode(struct inode *inode)
246{
247 pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
248 truncate_inode_pages(&inode->i_data, 0);
249 inode->i_size = 0;
250 affs_truncate(inode);
251 clear_inode(inode);
252 affs_free_block(inode->i_sb, inode->i_ino);
253}
254
255void
256affs_clear_inode(struct inode *inode)
257{
258 unsigned long cache_page;
259
260 pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
261
262 affs_free_prealloc(inode);
263 cache_page = (unsigned long)AFFS_I(inode)->i_lc;
264 if (cache_page) {
265 pr_debug("AFFS: freeing ext cache\n");
266 AFFS_I(inode)->i_lc = NULL;
267 AFFS_I(inode)->i_ac = NULL;
268 free_page(cache_page);
269 }
270 affs_brelse(AFFS_I(inode)->i_ext_bh);
271 AFFS_I(inode)->i_ext_last = ~1;
272 AFFS_I(inode)->i_ext_bh = NULL;
273}
274
275struct inode *
276affs_new_inode(struct inode *dir)
277{
278 struct super_block *sb = dir->i_sb;
279 struct inode *inode;
280 u32 block;
281 struct buffer_head *bh;
282
283 if (!(inode = new_inode(sb)))
284 goto err_inode;
285
286 if (!(block = affs_alloc_block(dir, dir->i_ino)))
287 goto err_block;
288
289 bh = affs_getzeroblk(sb, block);
290 if (!bh)
291 goto err_bh;
292 mark_buffer_dirty_inode(bh, inode);
293 affs_brelse(bh);
294
295 inode->i_uid = current_fsuid();
296 inode->i_gid = current_fsgid();
297 inode->i_ino = block;
298 inode->i_nlink = 1;
299 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
300 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
301 AFFS_I(inode)->i_blkcnt = 0;
302 AFFS_I(inode)->i_lc = NULL;
303 AFFS_I(inode)->i_lc_size = 0;
304 AFFS_I(inode)->i_lc_shift = 0;
305 AFFS_I(inode)->i_lc_mask = 0;
306 AFFS_I(inode)->i_ac = NULL;
307 AFFS_I(inode)->i_ext_bh = NULL;
308 AFFS_I(inode)->mmu_private = 0;
309 AFFS_I(inode)->i_protect = 0;
310 AFFS_I(inode)->i_lastalloc = 0;
311 AFFS_I(inode)->i_pa_cnt = 0;
312 AFFS_I(inode)->i_extcnt = 1;
313 AFFS_I(inode)->i_ext_last = ~1;
314
315 insert_inode_hash(inode);
316
317 return inode;
318
319err_bh:
320 affs_free_block(sb, block);
321err_block:
322 iput(inode);
323err_inode:
324 return NULL;
325}
326
327
328
329
330
331
332int
333affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
334{
335 struct super_block *sb = dir->i_sb;
336 struct buffer_head *inode_bh = NULL;
337 struct buffer_head *bh = NULL;
338 u32 block = 0;
339 int retval;
340
341 pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
342 (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
343
344 retval = -EIO;
345 bh = affs_bread(sb, inode->i_ino);
346 if (!bh)
347 goto done;
348
349 affs_lock_link(inode);
350 switch (type) {
351 case ST_LINKFILE:
352 case ST_LINKDIR:
353 retval = -ENOSPC;
354 block = affs_alloc_block(dir, dir->i_ino);
355 if (!block)
356 goto err;
357 retval = -EIO;
358 inode_bh = bh;
359 bh = affs_getzeroblk(sb, block);
360 if (!bh)
361 goto err;
362 break;
363 default:
364 break;
365 }
366
367 AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
368 AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
369 affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
370 AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
371 AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
372
373 if (inode_bh) {
374 __be32 chain;
375 chain = AFFS_TAIL(sb, inode_bh)->link_chain;
376 AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
377 AFFS_TAIL(sb, bh)->link_chain = chain;
378 AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
379 affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
380 mark_buffer_dirty_inode(inode_bh, inode);
381 inode->i_nlink = 2;
382 atomic_inc(&inode->i_count);
383 }
384 affs_fix_checksum(sb, bh);
385 mark_buffer_dirty_inode(bh, inode);
386 dentry->d_fsdata = (void *)(long)bh->b_blocknr;
387
388 affs_lock_dir(dir);
389 retval = affs_insert_hash(dir, bh);
390 mark_buffer_dirty_inode(bh, inode);
391 affs_unlock_dir(dir);
392 affs_unlock_link(inode);
393
394 d_instantiate(dentry, inode);
395done:
396 affs_brelse(inode_bh);
397 affs_brelse(bh);
398 return retval;
399err:
400 if (block)
401 affs_free_block(sb, block);
402 affs_unlock_link(inode);
403 goto done;
404}
405
