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1/*
2 * linux/fs/affs/inode.c
3 *
4 * (c) 1996 Hans-Joachim Widmaier - Rewritten
5 *
6 * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
7 *
8 * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
9 *
10 * (C) 1991 Linus Torvalds - minix filesystem
11 */
12#include <linux/sched.h>
13#include <linux/gfp.h>
14#include "affs.h"
15
16extern const struct inode_operations affs_symlink_inode_operations;
17extern struct timezone sys_tz;
18
19struct inode *affs_iget(struct super_block *sb, unsigned long ino)
20{
21 struct affs_sb_info *sbi = AFFS_SB(sb);
22 struct buffer_head *bh;
23 struct affs_head *head;
24 struct affs_tail *tail;
25 struct inode *inode;
26 u32 block;
27 u32 size;
28 u32 prot;
29 u16 id;
30
31 inode = iget_locked(sb, ino);
32 if (!inode)
33 return ERR_PTR(-ENOMEM);
34 if (!(inode->i_state & I_NEW))
35 return inode;
36
37 pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
38
39 block = inode->i_ino;
40 bh = affs_bread(sb, block);
41 if (!bh) {
42 affs_warning(sb, "read_inode", "Cannot read block %d", block);
43 goto bad_inode;
44 }
45 if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
46 affs_warning(sb,"read_inode",
47 "Checksum or type (ptype=%d) error on inode %d",
48 AFFS_HEAD(bh)->ptype, block);
49 goto bad_inode;
50 }
51
52 head = AFFS_HEAD(bh);
53 tail = AFFS_TAIL(sb, bh);
54 prot = be32_to_cpu(tail->protect);
55
56 inode->i_size = 0;
57 set_nlink(inode, 1);
58 inode->i_mode = 0;
59 AFFS_I(inode)->i_extcnt = 1;
60 AFFS_I(inode)->i_ext_last = ~1;
61 AFFS_I(inode)->i_protect = prot;
62 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
63 AFFS_I(inode)->i_blkcnt = 0;
64 AFFS_I(inode)->i_lc = NULL;
65 AFFS_I(inode)->i_lc_size = 0;
66 AFFS_I(inode)->i_lc_shift = 0;
67 AFFS_I(inode)->i_lc_mask = 0;
68 AFFS_I(inode)->i_ac = NULL;
69 AFFS_I(inode)->i_ext_bh = NULL;
70 AFFS_I(inode)->mmu_private = 0;
71 AFFS_I(inode)->i_lastalloc = 0;
72 AFFS_I(inode)->i_pa_cnt = 0;
73
74 if (sbi->s_flags & SF_SETMODE)
75 inode->i_mode = sbi->s_mode;
76 else
77 inode->i_mode = prot_to_mode(prot);
78
79 id = be16_to_cpu(tail->uid);
80 if (id == 0 || sbi->s_flags & SF_SETUID)
81 inode->i_uid = sbi->s_uid;
82 else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
83 i_uid_write(inode, 0);
84 else
85 i_uid_write(inode, id);
86
87 id = be16_to_cpu(tail->gid);
88 if (id == 0 || sbi->s_flags & SF_SETGID)
89 inode->i_gid = sbi->s_gid;
90 else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
91 i_gid_write(inode, 0);
92 else
93 i_gid_write(inode, id);
94
95 switch (be32_to_cpu(tail->stype)) {
96 case ST_ROOT:
97 inode->i_uid = sbi->s_uid;
98 inode->i_gid = sbi->s_gid;
99 /* fall through */
100 case ST_USERDIR:
101 if (be32_to_cpu(tail->stype) == ST_USERDIR ||
102 sbi->s_flags & SF_SETMODE) {
103 if (inode->i_mode & S_IRUSR)
104 inode->i_mode |= S_IXUSR;
105 if (inode->i_mode & S_IRGRP)
106 inode->i_mode |= S_IXGRP;
107 if (inode->i_mode & S_IROTH)
108 inode->i_mode |= S_IXOTH;
109 inode->i_mode |= S_IFDIR;
110 } else
111 inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
112 /* Maybe it should be controlled by mount parameter? */
113 //inode->i_mode |= S_ISVTX;
114 inode->i_op = &affs_dir_inode_operations;
115 inode->i_fop = &affs_dir_operations;
116 break;
117 case ST_LINKDIR:
118#if 0
119 affs_warning(sb, "read_inode", "inode is LINKDIR");
120 goto bad_inode;
121#else
122 inode->i_mode |= S_IFDIR;
123 /* ... and leave ->i_op and ->i_fop pointing to empty */
124 break;
125#endif
126 case ST_LINKFILE:
127 affs_warning(sb, "read_inode", "inode is LINKFILE");
128 goto bad_inode;
129 case ST_FILE:
130 size = be32_to_cpu(tail->size);
131 inode->i_mode |= S_IFREG;
132 AFFS_I(inode)->mmu_private = inode->i_size = size;
133 if (inode->i_size) {
134 AFFS_I(inode)->i_blkcnt = (size - 1) /
135 sbi->s_data_blksize + 1;
136 AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
137 sbi->s_hashsize + 1;
138 }
139 if (tail->link_chain)
140 set_nlink(inode, 2);
141 inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
142 inode->i_op = &affs_file_inode_operations;
143 inode->i_fop = &affs_file_operations;
144 break;
145 case ST_SOFTLINK:
146 inode->i_mode |= S_IFLNK;
147 inode->i_op = &affs_symlink_inode_operations;
148 inode->i_data.a_ops = &affs_symlink_aops;
149 break;
150 }
151
152 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
153 = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
154 be32_to_cpu(tail->change.mins) * 60 +
155 be32_to_cpu(tail->change.ticks) / 50 +
156 ((8 * 365 + 2) * 24 * 60 * 60)) +
157 sys_tz.tz_minuteswest * 60;
158 inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
159 affs_brelse(bh);
160 unlock_new_inode(inode);
161 return inode;
162
163bad_inode:
164 affs_brelse(bh);
165 iget_failed(inode);
166 return ERR_PTR(-EIO);
167}
168
169int
170affs_write_inode(struct inode *inode, struct writeback_control *wbc)
171{
172 struct super_block *sb = inode->i_sb;
173 struct buffer_head *bh;
174 struct affs_tail *tail;
175 uid_t uid;
176 gid_t gid;
177
178 pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
179
180 if (!inode->i_nlink)
181 // possibly free block
182 return 0;
183 bh = affs_bread(sb, inode->i_ino);
184 if (!bh) {
185 affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
186 return -EIO;
187 }
188 tail = AFFS_TAIL(sb, bh);
189 if (tail->stype == cpu_to_be32(ST_ROOT)) {
190 secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
191 } else {
192 tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
193 tail->size = cpu_to_be32(inode->i_size);
194 secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
195 if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
196 uid = i_uid_read(inode);
197 gid = i_gid_read(inode);
198 if (AFFS_SB(sb)->s_flags & SF_MUFS) {
199 if (uid == 0 || uid == 0xFFFF)
200 uid = uid ^ ~0;
201 if (gid == 0 || gid == 0xFFFF)
202 gid = gid ^ ~0;
203 }
204 if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
205 tail->uid = cpu_to_be16(uid);
206 if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
207 tail->gid = cpu_to_be16(gid);
208 }
209 }
210 affs_fix_checksum(sb, bh);
211 mark_buffer_dirty_inode(bh, inode);
212 affs_brelse(bh);
213 affs_free_prealloc(inode);
214 return 0;
215}
216
217int
218affs_notify_change(struct dentry *dentry, struct iattr *attr)
219{
220 struct inode *inode = dentry->d_inode;
221 int error;
222
223 pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
224
225 error = inode_change_ok(inode,attr);
226 if (error)
227 goto out;
228
229 if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) ||
230 ((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) ||
231 ((attr->ia_valid & ATTR_MODE) &&
232 (AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) {
233 if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
234 error = -EPERM;
235 goto out;
236 }
237
238 if ((attr->ia_valid & ATTR_SIZE) &&
239 attr->ia_size != i_size_read(inode)) {
240 error = inode_newsize_ok(inode, attr->ia_size);
241 if (error)
242 return error;
243
244 truncate_setsize(inode, attr->ia_size);
245 affs_truncate(inode);
246 }
247
248 setattr_copy(inode, attr);
249 mark_inode_dirty(inode);
250
251 if (attr->ia_valid & ATTR_MODE)
252 mode_to_prot(inode);
253out:
254 return error;
255}
256
257void
258affs_evict_inode(struct inode *inode)
259{
260 unsigned long cache_page;
261 pr_debug("AFFS: evict_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
262 truncate_inode_pages_final(&inode->i_data);
263
264 if (!inode->i_nlink) {
265 inode->i_size = 0;
266 affs_truncate(inode);
267 }
268
269 invalidate_inode_buffers(inode);
270 clear_inode(inode);
271 affs_free_prealloc(inode);
272 cache_page = (unsigned long)AFFS_I(inode)->i_lc;
273 if (cache_page) {
274 pr_debug("AFFS: freeing ext cache\n");
275 AFFS_I(inode)->i_lc = NULL;
276 AFFS_I(inode)->i_ac = NULL;
277 free_page(cache_page);
278 }
279 affs_brelse(AFFS_I(inode)->i_ext_bh);
280 AFFS_I(inode)->i_ext_last = ~1;
281 AFFS_I(inode)->i_ext_bh = NULL;
282
283 if (!inode->i_nlink)
284 affs_free_block(inode->i_sb, inode->i_ino);
285}
286
287struct inode *
288affs_new_inode(struct inode *dir)
289{
290 struct super_block *sb = dir->i_sb;
291 struct inode *inode;
292 u32 block;
293 struct buffer_head *bh;
294
295 if (!(inode = new_inode(sb)))
296 goto err_inode;
297
298 if (!(block = affs_alloc_block(dir, dir->i_ino)))
299 goto err_block;
300
301 bh = affs_getzeroblk(sb, block);
302 if (!bh)
303 goto err_bh;
304 mark_buffer_dirty_inode(bh, inode);
305 affs_brelse(bh);
306
307 inode->i_uid = current_fsuid();
308 inode->i_gid = current_fsgid();
309 inode->i_ino = block;
310 set_nlink(inode, 1);
311 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
312 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
313 AFFS_I(inode)->i_blkcnt = 0;
314 AFFS_I(inode)->i_lc = NULL;
315 AFFS_I(inode)->i_lc_size = 0;
316 AFFS_I(inode)->i_lc_shift = 0;
317 AFFS_I(inode)->i_lc_mask = 0;
318 AFFS_I(inode)->i_ac = NULL;
319 AFFS_I(inode)->i_ext_bh = NULL;
320 AFFS_I(inode)->mmu_private = 0;
321 AFFS_I(inode)->i_protect = 0;
322 AFFS_I(inode)->i_lastalloc = 0;
323 AFFS_I(inode)->i_pa_cnt = 0;
324 AFFS_I(inode)->i_extcnt = 1;
325 AFFS_I(inode)->i_ext_last = ~1;
326
327 insert_inode_hash(inode);
328
329 return inode;
330
331err_bh:
332 affs_free_block(sb, block);
333err_block:
334 iput(inode);
335err_inode:
336 return NULL;
337}
338
339/*
340 * Add an entry to a directory. Create the header block
341 * and insert it into the hash table.
342 */
343
344int
345affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
346{
347 struct super_block *sb = dir->i_sb;
348 struct buffer_head *inode_bh = NULL;
349 struct buffer_head *bh = NULL;
350 u32 block = 0;
351 int retval;
352
353 pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
354 (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
355
356 retval = -EIO;
357 bh = affs_bread(sb, inode->i_ino);
358 if (!bh)
359 goto done;
360
361 affs_lock_link(inode);
362 switch (type) {
363 case ST_LINKFILE:
364 case ST_LINKDIR:
365 retval = -ENOSPC;
366 block = affs_alloc_block(dir, dir->i_ino);
367 if (!block)
368 goto err;
369 retval = -EIO;
370 inode_bh = bh;
371 bh = affs_getzeroblk(sb, block);
372 if (!bh)
373 goto err;
374 break;
375 default:
376 break;
377 }
378
379 AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
380 AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
381 affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
382 AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
383 AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
384
385 if (inode_bh) {
386 __be32 chain;
387 chain = AFFS_TAIL(sb, inode_bh)->link_chain;
388 AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
389 AFFS_TAIL(sb, bh)->link_chain = chain;
390 AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
391 affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
392 mark_buffer_dirty_inode(inode_bh, inode);
393 set_nlink(inode, 2);
394 ihold(inode);
395 }
396 affs_fix_checksum(sb, bh);
397 mark_buffer_dirty_inode(bh, inode);
398 dentry->d_fsdata = (void *)(long)bh->b_blocknr;
399
400 affs_lock_dir(dir);
401 retval = affs_insert_hash(dir, bh);
402 mark_buffer_dirty_inode(bh, inode);
403 affs_unlock_dir(dir);
404 affs_unlock_link(inode);
405
406 d_instantiate(dentry, inode);
407done:
408 affs_brelse(inode_bh);
409 affs_brelse(bh);
410 return retval;
411err:
412 if (block)
413 affs_free_block(sb, block);
414 affs_unlock_link(inode);
415 goto done;
416}
1/*
2 * linux/fs/affs/inode.c
3 *
4 * (c) 1996 Hans-Joachim Widmaier - Rewritten
5 *
6 * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
7 *
8 * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
9 *
10 * (C) 1991 Linus Torvalds - minix filesystem
11 */
12#include <linux/sched.h>
13#include <linux/gfp.h>
14#include "affs.h"
15
16struct inode *affs_iget(struct super_block *sb, unsigned long ino)
17{
18 struct affs_sb_info *sbi = AFFS_SB(sb);
19 struct buffer_head *bh;
20 struct affs_tail *tail;
21 struct inode *inode;
22 u32 block;
23 u32 size;
24 u32 prot;
25 u16 id;
26
27 inode = iget_locked(sb, ino);
28 if (!inode)
29 return ERR_PTR(-ENOMEM);
30 if (!(inode->i_state & I_NEW))
31 return inode;
32
33 pr_debug("affs_iget(%lu)\n", inode->i_ino);
34
35 block = inode->i_ino;
36 bh = affs_bread(sb, block);
37 if (!bh) {
38 affs_warning(sb, "read_inode", "Cannot read block %d", block);
39 goto bad_inode;
40 }
41 if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
42 affs_warning(sb,"read_inode",
43 "Checksum or type (ptype=%d) error on inode %d",
44 AFFS_HEAD(bh)->ptype, block);
45 goto bad_inode;
46 }
47
48 tail = AFFS_TAIL(sb, bh);
49 prot = be32_to_cpu(tail->protect);
50
51 inode->i_size = 0;
52 set_nlink(inode, 1);
53 inode->i_mode = 0;
54 AFFS_I(inode)->i_extcnt = 1;
55 AFFS_I(inode)->i_ext_last = ~1;
56 AFFS_I(inode)->i_protect = prot;
57 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
58 AFFS_I(inode)->i_blkcnt = 0;
59 AFFS_I(inode)->i_lc = NULL;
60 AFFS_I(inode)->i_lc_size = 0;
61 AFFS_I(inode)->i_lc_shift = 0;
62 AFFS_I(inode)->i_lc_mask = 0;
63 AFFS_I(inode)->i_ac = NULL;
64 AFFS_I(inode)->i_ext_bh = NULL;
65 AFFS_I(inode)->mmu_private = 0;
66 AFFS_I(inode)->i_lastalloc = 0;
67 AFFS_I(inode)->i_pa_cnt = 0;
68
69 if (affs_test_opt(sbi->s_flags, SF_SETMODE))
70 inode->i_mode = sbi->s_mode;
71 else
72 inode->i_mode = prot_to_mode(prot);
73
74 id = be16_to_cpu(tail->uid);
75 if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETUID))
76 inode->i_uid = sbi->s_uid;
77 else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
78 i_uid_write(inode, 0);
79 else
80 i_uid_write(inode, id);
81
82 id = be16_to_cpu(tail->gid);
83 if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETGID))
84 inode->i_gid = sbi->s_gid;
85 else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
86 i_gid_write(inode, 0);
87 else
88 i_gid_write(inode, id);
89
90 switch (be32_to_cpu(tail->stype)) {
91 case ST_ROOT:
92 inode->i_uid = sbi->s_uid;
93 inode->i_gid = sbi->s_gid;
94 /* fall through */
95 case ST_USERDIR:
96 if (be32_to_cpu(tail->stype) == ST_USERDIR ||
97 affs_test_opt(sbi->s_flags, SF_SETMODE)) {
98 if (inode->i_mode & S_IRUSR)
99 inode->i_mode |= S_IXUSR;
100 if (inode->i_mode & S_IRGRP)
101 inode->i_mode |= S_IXGRP;
102 if (inode->i_mode & S_IROTH)
103 inode->i_mode |= S_IXOTH;
104 inode->i_mode |= S_IFDIR;
105 } else
106 inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
107 /* Maybe it should be controlled by mount parameter? */
108 //inode->i_mode |= S_ISVTX;
109 inode->i_op = &affs_dir_inode_operations;
110 inode->i_fop = &affs_dir_operations;
111 break;
112 case ST_LINKDIR:
113#if 0
114 affs_warning(sb, "read_inode", "inode is LINKDIR");
115 goto bad_inode;
116#else
117 inode->i_mode |= S_IFDIR;
118 /* ... and leave ->i_op and ->i_fop pointing to empty */
119 break;
120#endif
121 case ST_LINKFILE:
122 affs_warning(sb, "read_inode", "inode is LINKFILE");
123 goto bad_inode;
124 case ST_FILE:
125 size = be32_to_cpu(tail->size);
126 inode->i_mode |= S_IFREG;
127 AFFS_I(inode)->mmu_private = inode->i_size = size;
128 if (inode->i_size) {
129 AFFS_I(inode)->i_blkcnt = (size - 1) /
130 sbi->s_data_blksize + 1;
131 AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
132 sbi->s_hashsize + 1;
133 }
134 if (tail->link_chain)
135 set_nlink(inode, 2);
136 inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
137 &affs_aops_ofs : &affs_aops;
138 inode->i_op = &affs_file_inode_operations;
139 inode->i_fop = &affs_file_operations;
140 break;
141 case ST_SOFTLINK:
142 inode->i_mode |= S_IFLNK;
143 inode_nohighmem(inode);
144 inode->i_op = &affs_symlink_inode_operations;
145 inode->i_data.a_ops = &affs_symlink_aops;
146 break;
147 }
148
149 inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
150 = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
151 be32_to_cpu(tail->change.mins) * 60 +
152 be32_to_cpu(tail->change.ticks) / 50 +
153 ((8 * 365 + 2) * 24 * 60 * 60)) +
154 sys_tz.tz_minuteswest * 60;
155 inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
156 affs_brelse(bh);
157 unlock_new_inode(inode);
158 return inode;
159
160bad_inode:
161 affs_brelse(bh);
162 iget_failed(inode);
163 return ERR_PTR(-EIO);
164}
165
166int
167affs_write_inode(struct inode *inode, struct writeback_control *wbc)
168{
169 struct super_block *sb = inode->i_sb;
170 struct buffer_head *bh;
171 struct affs_tail *tail;
172 uid_t uid;
173 gid_t gid;
174
175 pr_debug("write_inode(%lu)\n", inode->i_ino);
176
177 if (!inode->i_nlink)
178 // possibly free block
179 return 0;
180 bh = affs_bread(sb, inode->i_ino);
181 if (!bh) {
182 affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
183 return -EIO;
184 }
185 tail = AFFS_TAIL(sb, bh);
186 if (tail->stype == cpu_to_be32(ST_ROOT)) {
187 secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
188 } else {
189 tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
190 tail->size = cpu_to_be32(inode->i_size);
191 secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
192 if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
193 uid = i_uid_read(inode);
194 gid = i_gid_read(inode);
195 if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
196 if (uid == 0 || uid == 0xFFFF)
197 uid = uid ^ ~0;
198 if (gid == 0 || gid == 0xFFFF)
199 gid = gid ^ ~0;
200 }
201 if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
202 tail->uid = cpu_to_be16(uid);
203 if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
204 tail->gid = cpu_to_be16(gid);
205 }
206 }
207 affs_fix_checksum(sb, bh);
208 mark_buffer_dirty_inode(bh, inode);
209 affs_brelse(bh);
210 affs_free_prealloc(inode);
211 return 0;
212}
213
214int
215affs_notify_change(struct dentry *dentry, struct iattr *attr)
216{
217 struct inode *inode = d_inode(dentry);
218 int error;
219
220 pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
221
222 error = inode_change_ok(inode,attr);
223 if (error)
224 goto out;
225
226 if (((attr->ia_valid & ATTR_UID) &&
227 affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) ||
228 ((attr->ia_valid & ATTR_GID) &&
229 affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) ||
230 ((attr->ia_valid & ATTR_MODE) &&
231 (AFFS_SB(inode->i_sb)->s_flags &
232 (AFFS_MOUNT_SF_SETMODE | AFFS_MOUNT_SF_IMMUTABLE)))) {
233 if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
234 error = -EPERM;
235 goto out;
236 }
237
238 if ((attr->ia_valid & ATTR_SIZE) &&
239 attr->ia_size != i_size_read(inode)) {
240 error = inode_newsize_ok(inode, attr->ia_size);
241 if (error)
242 return error;
243
244 truncate_setsize(inode, attr->ia_size);
245 affs_truncate(inode);
246 }
247
248 setattr_copy(inode, attr);
249 mark_inode_dirty(inode);
250
251 if (attr->ia_valid & ATTR_MODE)
252 mode_to_prot(inode);
253out:
254 return error;
255}
256
257void
258affs_evict_inode(struct inode *inode)
259{
260 unsigned long cache_page;
261 pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
262 inode->i_ino, inode->i_nlink);
263 truncate_inode_pages_final(&inode->i_data);
264
265 if (!inode->i_nlink) {
266 inode->i_size = 0;
267 affs_truncate(inode);
268 }
269
270 invalidate_inode_buffers(inode);
271 clear_inode(inode);
272 affs_free_prealloc(inode);
273 cache_page = (unsigned long)AFFS_I(inode)->i_lc;
274 if (cache_page) {
275 pr_debug("freeing ext cache\n");
276 AFFS_I(inode)->i_lc = NULL;
277 AFFS_I(inode)->i_ac = NULL;
278 free_page(cache_page);
279 }
280 affs_brelse(AFFS_I(inode)->i_ext_bh);
281 AFFS_I(inode)->i_ext_last = ~1;
282 AFFS_I(inode)->i_ext_bh = NULL;
283
284 if (!inode->i_nlink)
285 affs_free_block(inode->i_sb, inode->i_ino);
286}
287
288struct inode *
289affs_new_inode(struct inode *dir)
290{
291 struct super_block *sb = dir->i_sb;
292 struct inode *inode;
293 u32 block;
294 struct buffer_head *bh;
295
296 if (!(inode = new_inode(sb)))
297 goto err_inode;
298
299 if (!(block = affs_alloc_block(dir, dir->i_ino)))
300 goto err_block;
301
302 bh = affs_getzeroblk(sb, block);
303 if (!bh)
304 goto err_bh;
305 mark_buffer_dirty_inode(bh, inode);
306 affs_brelse(bh);
307
308 inode->i_uid = current_fsuid();
309 inode->i_gid = current_fsgid();
310 inode->i_ino = block;
311 set_nlink(inode, 1);
312 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
313 atomic_set(&AFFS_I(inode)->i_opencnt, 0);
314 AFFS_I(inode)->i_blkcnt = 0;
315 AFFS_I(inode)->i_lc = NULL;
316 AFFS_I(inode)->i_lc_size = 0;
317 AFFS_I(inode)->i_lc_shift = 0;
318 AFFS_I(inode)->i_lc_mask = 0;
319 AFFS_I(inode)->i_ac = NULL;
320 AFFS_I(inode)->i_ext_bh = NULL;
321 AFFS_I(inode)->mmu_private = 0;
322 AFFS_I(inode)->i_protect = 0;
323 AFFS_I(inode)->i_lastalloc = 0;
324 AFFS_I(inode)->i_pa_cnt = 0;
325 AFFS_I(inode)->i_extcnt = 1;
326 AFFS_I(inode)->i_ext_last = ~1;
327
328 insert_inode_hash(inode);
329
330 return inode;
331
332err_bh:
333 affs_free_block(sb, block);
334err_block:
335 iput(inode);
336err_inode:
337 return NULL;
338}
339
340/*
341 * Add an entry to a directory. Create the header block
342 * and insert it into the hash table.
343 */
344
345int
346affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
347{
348 struct super_block *sb = dir->i_sb;
349 struct buffer_head *inode_bh = NULL;
350 struct buffer_head *bh;
351 u32 block = 0;
352 int retval;
353
354 pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
355 dir->i_ino, inode->i_ino, dentry, type);
356
357 retval = -EIO;
358 bh = affs_bread(sb, inode->i_ino);
359 if (!bh)
360 goto done;
361
362 affs_lock_link(inode);
363 switch (type) {
364 case ST_LINKFILE:
365 case ST_LINKDIR:
366 retval = -ENOSPC;
367 block = affs_alloc_block(dir, dir->i_ino);
368 if (!block)
369 goto err;
370 retval = -EIO;
371 inode_bh = bh;
372 bh = affs_getzeroblk(sb, block);
373 if (!bh)
374 goto err;
375 break;
376 default:
377 break;
378 }
379
380 AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
381 AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
382 affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
383 AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
384 AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
385
386 if (inode_bh) {
387 __be32 chain;
388 chain = AFFS_TAIL(sb, inode_bh)->link_chain;
389 AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
390 AFFS_TAIL(sb, bh)->link_chain = chain;
391 AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
392 affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
393 mark_buffer_dirty_inode(inode_bh, inode);
394 set_nlink(inode, 2);
395 ihold(inode);
396 }
397 affs_fix_checksum(sb, bh);
398 mark_buffer_dirty_inode(bh, inode);
399 dentry->d_fsdata = (void *)(long)bh->b_blocknr;
400
401 affs_lock_dir(dir);
402 retval = affs_insert_hash(dir, bh);
403 mark_buffer_dirty_inode(bh, inode);
404 affs_unlock_dir(dir);
405 affs_unlock_link(inode);
406
407 d_instantiate(dentry, inode);
408done:
409 affs_brelse(inode_bh);
410 affs_brelse(bh);
411 return retval;
412err:
413 if (block)
414 affs_free_block(sb, block);
415 affs_unlock_link(inode);
416 goto done;
417}