Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/fs/adfs/inode.c
4 *
5 * Copyright (C) 1997-1999 Russell King
6 */
7#include <linux/buffer_head.h>
8#include <linux/writeback.h>
9#include "adfs.h"
10
11/*
12 * Lookup/Create a block at offset 'block' into 'inode'. We currently do
13 * not support creation of new blocks, so we return -EIO for this case.
14 */
15static int
16adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh,
17 int create)
18{
19 if (!create) {
20 if (block >= inode->i_blocks)
21 goto abort_toobig;
22
23 block = __adfs_block_map(inode->i_sb, ADFS_I(inode)->indaddr,
24 block);
25 if (block)
26 map_bh(bh, inode->i_sb, block);
27 return 0;
28 }
29 /* don't support allocation of blocks yet */
30 return -EIO;
31
32abort_toobig:
33 return 0;
34}
35
36static int adfs_writepage(struct page *page, struct writeback_control *wbc)
37{
38 return block_write_full_page(page, adfs_get_block, wbc);
39}
40
41static int adfs_read_folio(struct file *file, struct folio *folio)
42{
43 return block_read_full_folio(folio, adfs_get_block);
44}
45
46static void adfs_write_failed(struct address_space *mapping, loff_t to)
47{
48 struct inode *inode = mapping->host;
49
50 if (to > inode->i_size)
51 truncate_pagecache(inode, inode->i_size);
52}
53
54static int adfs_write_begin(struct file *file, struct address_space *mapping,
55 loff_t pos, unsigned len,
56 struct page **pagep, void **fsdata)
57{
58 int ret;
59
60 *pagep = NULL;
61 ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
62 adfs_get_block,
63 &ADFS_I(mapping->host)->mmu_private);
64 if (unlikely(ret))
65 adfs_write_failed(mapping, pos + len);
66
67 return ret;
68}
69
70static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
71{
72 return generic_block_bmap(mapping, block, adfs_get_block);
73}
74
75static const struct address_space_operations adfs_aops = {
76 .dirty_folio = block_dirty_folio,
77 .invalidate_folio = block_invalidate_folio,
78 .read_folio = adfs_read_folio,
79 .writepage = adfs_writepage,
80 .write_begin = adfs_write_begin,
81 .write_end = generic_write_end,
82 .bmap = _adfs_bmap
83};
84
85/*
86 * Convert ADFS attributes and filetype to Linux permission.
87 */
88static umode_t
89adfs_atts2mode(struct super_block *sb, struct inode *inode)
90{
91 unsigned int attr = ADFS_I(inode)->attr;
92 umode_t mode, rmask;
93 struct adfs_sb_info *asb = ADFS_SB(sb);
94
95 if (attr & ADFS_NDA_DIRECTORY) {
96 mode = S_IRUGO & asb->s_owner_mask;
97 return S_IFDIR | S_IXUGO | mode;
98 }
99
100 switch (adfs_filetype(ADFS_I(inode)->loadaddr)) {
101 case 0xfc0: /* LinkFS */
102 return S_IFLNK|S_IRWXUGO;
103
104 case 0xfe6: /* UnixExec */
105 rmask = S_IRUGO | S_IXUGO;
106 break;
107
108 default:
109 rmask = S_IRUGO;
110 }
111
112 mode = S_IFREG;
113
114 if (attr & ADFS_NDA_OWNER_READ)
115 mode |= rmask & asb->s_owner_mask;
116
117 if (attr & ADFS_NDA_OWNER_WRITE)
118 mode |= S_IWUGO & asb->s_owner_mask;
119
120 if (attr & ADFS_NDA_PUBLIC_READ)
121 mode |= rmask & asb->s_other_mask;
122
123 if (attr & ADFS_NDA_PUBLIC_WRITE)
124 mode |= S_IWUGO & asb->s_other_mask;
125 return mode;
126}
127
128/*
129 * Convert Linux permission to ADFS attribute. We try to do the reverse
130 * of atts2mode, but there is not a 1:1 translation.
131 */
132static int adfs_mode2atts(struct super_block *sb, struct inode *inode,
133 umode_t ia_mode)
134{
135 struct adfs_sb_info *asb = ADFS_SB(sb);
136 umode_t mode;
137 int attr;
138
139 /* FIXME: should we be able to alter a link? */
140 if (S_ISLNK(inode->i_mode))
141 return ADFS_I(inode)->attr;
142
143 /* Directories do not have read/write permissions on the media */
144 if (S_ISDIR(inode->i_mode))
145 return ADFS_NDA_DIRECTORY;
146
147 attr = 0;
148 mode = ia_mode & asb->s_owner_mask;
149 if (mode & S_IRUGO)
150 attr |= ADFS_NDA_OWNER_READ;
151 if (mode & S_IWUGO)
152 attr |= ADFS_NDA_OWNER_WRITE;
153
154 mode = ia_mode & asb->s_other_mask;
155 mode &= ~asb->s_owner_mask;
156 if (mode & S_IRUGO)
157 attr |= ADFS_NDA_PUBLIC_READ;
158 if (mode & S_IWUGO)
159 attr |= ADFS_NDA_PUBLIC_WRITE;
160
161 return attr;
162}
163
164static const s64 nsec_unix_epoch_diff_risc_os_epoch = 2208988800000000000LL;
165
166/*
167 * Convert an ADFS time to Unix time. ADFS has a 40-bit centi-second time
168 * referenced to 1 Jan 1900 (til 2248) so we need to discard 2208988800 seconds
169 * of time to convert from RISC OS epoch to Unix epoch.
170 */
171static void
172adfs_adfs2unix_time(struct timespec64 *tv, struct inode *inode)
173{
174 unsigned int high, low;
175 /* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since
176 * 01 Jan 1900 00:00:00 (RISC OS epoch)
177 */
178 s64 nsec;
179
180 if (!adfs_inode_is_stamped(inode))
181 goto cur_time;
182
183 high = ADFS_I(inode)->loadaddr & 0xFF; /* top 8 bits of timestamp */
184 low = ADFS_I(inode)->execaddr; /* bottom 32 bits of timestamp */
185
186 /* convert 40-bit centi-seconds to 32-bit seconds
187 * going via nanoseconds to retain precision
188 */
189 nsec = (((s64) high << 32) | (s64) low) * 10000000; /* cs to ns */
190
191 /* Files dated pre 01 Jan 1970 00:00:00. */
192 if (nsec < nsec_unix_epoch_diff_risc_os_epoch)
193 goto too_early;
194
195 /* convert from RISC OS to Unix epoch */
196 nsec -= nsec_unix_epoch_diff_risc_os_epoch;
197
198 *tv = ns_to_timespec64(nsec);
199 return;
200
201 cur_time:
202 *tv = current_time(inode);
203 return;
204
205 too_early:
206 tv->tv_sec = tv->tv_nsec = 0;
207 return;
208}
209
210/* Convert an Unix time to ADFS time for an entry that is already stamped. */
211static void adfs_unix2adfs_time(struct inode *inode,
212 const struct timespec64 *ts)
213{
214 s64 cs, nsec = timespec64_to_ns(ts);
215
216 /* convert from Unix to RISC OS epoch */
217 nsec += nsec_unix_epoch_diff_risc_os_epoch;
218
219 /* convert from nanoseconds to centiseconds */
220 cs = div_s64(nsec, 10000000);
221
222 cs = clamp_t(s64, cs, 0, 0xffffffffff);
223
224 ADFS_I(inode)->loadaddr &= ~0xff;
225 ADFS_I(inode)->loadaddr |= (cs >> 32) & 0xff;
226 ADFS_I(inode)->execaddr = cs;
227}
228
229/*
230 * Fill in the inode information from the object information.
231 *
232 * Note that this is an inode-less filesystem, so we can't use the inode
233 * number to reference the metadata on the media. Instead, we use the
234 * inode number to hold the object ID, which in turn will tell us where
235 * the data is held. We also save the parent object ID, and with these
236 * two, we can locate the metadata.
237 *
238 * This does mean that we rely on an objects parent remaining the same at
239 * all times - we cannot cope with a cross-directory rename (yet).
240 */
241struct inode *
242adfs_iget(struct super_block *sb, struct object_info *obj)
243{
244 struct inode *inode;
245
246 inode = new_inode(sb);
247 if (!inode)
248 goto out;
249
250 inode->i_uid = ADFS_SB(sb)->s_uid;
251 inode->i_gid = ADFS_SB(sb)->s_gid;
252 inode->i_ino = obj->indaddr;
253 inode->i_size = obj->size;
254 set_nlink(inode, 2);
255 inode->i_blocks = (inode->i_size + sb->s_blocksize - 1) >>
256 sb->s_blocksize_bits;
257
258 /*
259 * we need to save the parent directory ID so that
260 * write_inode can update the directory information
261 * for this file. This will need special handling
262 * for cross-directory renames.
263 */
264 ADFS_I(inode)->parent_id = obj->parent_id;
265 ADFS_I(inode)->indaddr = obj->indaddr;
266 ADFS_I(inode)->loadaddr = obj->loadaddr;
267 ADFS_I(inode)->execaddr = obj->execaddr;
268 ADFS_I(inode)->attr = obj->attr;
269
270 inode->i_mode = adfs_atts2mode(sb, inode);
271 adfs_adfs2unix_time(&inode->i_mtime, inode);
272 inode->i_atime = inode->i_mtime;
273 inode->i_ctime = inode->i_mtime;
274
275 if (S_ISDIR(inode->i_mode)) {
276 inode->i_op = &adfs_dir_inode_operations;
277 inode->i_fop = &adfs_dir_operations;
278 } else if (S_ISREG(inode->i_mode)) {
279 inode->i_op = &adfs_file_inode_operations;
280 inode->i_fop = &adfs_file_operations;
281 inode->i_mapping->a_ops = &adfs_aops;
282 ADFS_I(inode)->mmu_private = inode->i_size;
283 }
284
285 inode_fake_hash(inode);
286
287out:
288 return inode;
289}
290
291/*
292 * Validate and convert a changed access mode/time to their ADFS equivalents.
293 * adfs_write_inode will actually write the information back to the directory
294 * later.
295 */
296int
297adfs_notify_change(struct user_namespace *mnt_userns, struct dentry *dentry,
298 struct iattr *attr)
299{
300 struct inode *inode = d_inode(dentry);
301 struct super_block *sb = inode->i_sb;
302 unsigned int ia_valid = attr->ia_valid;
303 int error;
304
305 error = setattr_prepare(&init_user_ns, dentry, attr);
306
307 /*
308 * we can't change the UID or GID of any file -
309 * we have a global UID/GID in the superblock
310 */
311 if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, ADFS_SB(sb)->s_uid)) ||
312 (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, ADFS_SB(sb)->s_gid)))
313 error = -EPERM;
314
315 if (error)
316 goto out;
317
318 /* XXX: this is missing some actual on-disk truncation.. */
319 if (ia_valid & ATTR_SIZE)
320 truncate_setsize(inode, attr->ia_size);
321
322 if (ia_valid & ATTR_MTIME && adfs_inode_is_stamped(inode)) {
323 adfs_unix2adfs_time(inode, &attr->ia_mtime);
324 adfs_adfs2unix_time(&inode->i_mtime, inode);
325 }
326
327 /*
328 * FIXME: should we make these == to i_mtime since we don't
329 * have the ability to represent them in our filesystem?
330 */
331 if (ia_valid & ATTR_ATIME)
332 inode->i_atime = attr->ia_atime;
333 if (ia_valid & ATTR_CTIME)
334 inode->i_ctime = attr->ia_ctime;
335 if (ia_valid & ATTR_MODE) {
336 ADFS_I(inode)->attr = adfs_mode2atts(sb, inode, attr->ia_mode);
337 inode->i_mode = adfs_atts2mode(sb, inode);
338 }
339
340 /*
341 * FIXME: should we be marking this inode dirty even if
342 * we don't have any metadata to write back?
343 */
344 if (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MODE))
345 mark_inode_dirty(inode);
346out:
347 return error;
348}
349
350/*
351 * write an existing inode back to the directory, and therefore the disk.
352 * The adfs-specific inode data has already been updated by
353 * adfs_notify_change()
354 */
355int adfs_write_inode(struct inode *inode, struct writeback_control *wbc)
356{
357 struct super_block *sb = inode->i_sb;
358 struct object_info obj;
359
360 obj.indaddr = ADFS_I(inode)->indaddr;
361 obj.name_len = 0;
362 obj.parent_id = ADFS_I(inode)->parent_id;
363 obj.loadaddr = ADFS_I(inode)->loadaddr;
364 obj.execaddr = ADFS_I(inode)->execaddr;
365 obj.attr = ADFS_I(inode)->attr;
366 obj.size = inode->i_size;
367
368 return adfs_dir_update(sb, &obj, wbc->sync_mode == WB_SYNC_ALL);
369}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/fs/adfs/inode.c
4 *
5 * Copyright (C) 1997-1999 Russell King
6 */
7#include <linux/buffer_head.h>
8#include <linux/writeback.h>
9#include "adfs.h"
10
11/*
12 * Lookup/Create a block at offset 'block' into 'inode'. We currently do
13 * not support creation of new blocks, so we return -EIO for this case.
14 */
15static int
16adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh,
17 int create)
18{
19 if (!create) {
20 if (block >= inode->i_blocks)
21 goto abort_toobig;
22
23 block = __adfs_block_map(inode->i_sb, ADFS_I(inode)->indaddr,
24 block);
25 if (block)
26 map_bh(bh, inode->i_sb, block);
27 return 0;
28 }
29 /* don't support allocation of blocks yet */
30 return -EIO;
31
32abort_toobig:
33 return 0;
34}
35
36static int adfs_writepage(struct page *page, struct writeback_control *wbc)
37{
38 return block_write_full_page(page, adfs_get_block, wbc);
39}
40
41static int adfs_readpage(struct file *file, struct page *page)
42{
43 return block_read_full_page(page, adfs_get_block);
44}
45
46static void adfs_write_failed(struct address_space *mapping, loff_t to)
47{
48 struct inode *inode = mapping->host;
49
50 if (to > inode->i_size)
51 truncate_pagecache(inode, inode->i_size);
52}
53
54static int adfs_write_begin(struct file *file, struct address_space *mapping,
55 loff_t pos, unsigned len, unsigned flags,
56 struct page **pagep, void **fsdata)
57{
58 int ret;
59
60 *pagep = NULL;
61 ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
62 adfs_get_block,
63 &ADFS_I(mapping->host)->mmu_private);
64 if (unlikely(ret))
65 adfs_write_failed(mapping, pos + len);
66
67 return ret;
68}
69
70static sector_t _adfs_bmap(struct address_space *mapping, sector_t block)
71{
72 return generic_block_bmap(mapping, block, adfs_get_block);
73}
74
75static const struct address_space_operations adfs_aops = {
76 .set_page_dirty = __set_page_dirty_buffers,
77 .readpage = adfs_readpage,
78 .writepage = adfs_writepage,
79 .write_begin = adfs_write_begin,
80 .write_end = generic_write_end,
81 .bmap = _adfs_bmap
82};
83
84/*
85 * Convert ADFS attributes and filetype to Linux permission.
86 */
87static umode_t
88adfs_atts2mode(struct super_block *sb, struct inode *inode)
89{
90 unsigned int attr = ADFS_I(inode)->attr;
91 umode_t mode, rmask;
92 struct adfs_sb_info *asb = ADFS_SB(sb);
93
94 if (attr & ADFS_NDA_DIRECTORY) {
95 mode = S_IRUGO & asb->s_owner_mask;
96 return S_IFDIR | S_IXUGO | mode;
97 }
98
99 switch (adfs_filetype(ADFS_I(inode)->loadaddr)) {
100 case 0xfc0: /* LinkFS */
101 return S_IFLNK|S_IRWXUGO;
102
103 case 0xfe6: /* UnixExec */
104 rmask = S_IRUGO | S_IXUGO;
105 break;
106
107 default:
108 rmask = S_IRUGO;
109 }
110
111 mode = S_IFREG;
112
113 if (attr & ADFS_NDA_OWNER_READ)
114 mode |= rmask & asb->s_owner_mask;
115
116 if (attr & ADFS_NDA_OWNER_WRITE)
117 mode |= S_IWUGO & asb->s_owner_mask;
118
119 if (attr & ADFS_NDA_PUBLIC_READ)
120 mode |= rmask & asb->s_other_mask;
121
122 if (attr & ADFS_NDA_PUBLIC_WRITE)
123 mode |= S_IWUGO & asb->s_other_mask;
124 return mode;
125}
126
127/*
128 * Convert Linux permission to ADFS attribute. We try to do the reverse
129 * of atts2mode, but there is not a 1:1 translation.
130 */
131static int adfs_mode2atts(struct super_block *sb, struct inode *inode,
132 umode_t ia_mode)
133{
134 struct adfs_sb_info *asb = ADFS_SB(sb);
135 umode_t mode;
136 int attr;
137
138 /* FIXME: should we be able to alter a link? */
139 if (S_ISLNK(inode->i_mode))
140 return ADFS_I(inode)->attr;
141
142 /* Directories do not have read/write permissions on the media */
143 if (S_ISDIR(inode->i_mode))
144 return ADFS_NDA_DIRECTORY;
145
146 attr = 0;
147 mode = ia_mode & asb->s_owner_mask;
148 if (mode & S_IRUGO)
149 attr |= ADFS_NDA_OWNER_READ;
150 if (mode & S_IWUGO)
151 attr |= ADFS_NDA_OWNER_WRITE;
152
153 mode = ia_mode & asb->s_other_mask;
154 mode &= ~asb->s_owner_mask;
155 if (mode & S_IRUGO)
156 attr |= ADFS_NDA_PUBLIC_READ;
157 if (mode & S_IWUGO)
158 attr |= ADFS_NDA_PUBLIC_WRITE;
159
160 return attr;
161}
162
163static const s64 nsec_unix_epoch_diff_risc_os_epoch = 2208988800000000000LL;
164
165/*
166 * Convert an ADFS time to Unix time. ADFS has a 40-bit centi-second time
167 * referenced to 1 Jan 1900 (til 2248) so we need to discard 2208988800 seconds
168 * of time to convert from RISC OS epoch to Unix epoch.
169 */
170static void
171adfs_adfs2unix_time(struct timespec64 *tv, struct inode *inode)
172{
173 unsigned int high, low;
174 /* 01 Jan 1970 00:00:00 (Unix epoch) as nanoseconds since
175 * 01 Jan 1900 00:00:00 (RISC OS epoch)
176 */
177 s64 nsec;
178
179 if (!adfs_inode_is_stamped(inode))
180 goto cur_time;
181
182 high = ADFS_I(inode)->loadaddr & 0xFF; /* top 8 bits of timestamp */
183 low = ADFS_I(inode)->execaddr; /* bottom 32 bits of timestamp */
184
185 /* convert 40-bit centi-seconds to 32-bit seconds
186 * going via nanoseconds to retain precision
187 */
188 nsec = (((s64) high << 32) | (s64) low) * 10000000; /* cs to ns */
189
190 /* Files dated pre 01 Jan 1970 00:00:00. */
191 if (nsec < nsec_unix_epoch_diff_risc_os_epoch)
192 goto too_early;
193
194 /* convert from RISC OS to Unix epoch */
195 nsec -= nsec_unix_epoch_diff_risc_os_epoch;
196
197 *tv = ns_to_timespec64(nsec);
198 return;
199
200 cur_time:
201 *tv = current_time(inode);
202 return;
203
204 too_early:
205 tv->tv_sec = tv->tv_nsec = 0;
206 return;
207}
208
209/* Convert an Unix time to ADFS time for an entry that is already stamped. */
210static void adfs_unix2adfs_time(struct inode *inode,
211 const struct timespec64 *ts)
212{
213 s64 cs, nsec = timespec64_to_ns(ts);
214
215 /* convert from Unix to RISC OS epoch */
216 nsec += nsec_unix_epoch_diff_risc_os_epoch;
217
218 /* convert from nanoseconds to centiseconds */
219 cs = div_s64(nsec, 10000000);
220
221 cs = clamp_t(s64, cs, 0, 0xffffffffff);
222
223 ADFS_I(inode)->loadaddr &= ~0xff;
224 ADFS_I(inode)->loadaddr |= (cs >> 32) & 0xff;
225 ADFS_I(inode)->execaddr = cs;
226}
227
228/*
229 * Fill in the inode information from the object information.
230 *
231 * Note that this is an inode-less filesystem, so we can't use the inode
232 * number to reference the metadata on the media. Instead, we use the
233 * inode number to hold the object ID, which in turn will tell us where
234 * the data is held. We also save the parent object ID, and with these
235 * two, we can locate the metadata.
236 *
237 * This does mean that we rely on an objects parent remaining the same at
238 * all times - we cannot cope with a cross-directory rename (yet).
239 */
240struct inode *
241adfs_iget(struct super_block *sb, struct object_info *obj)
242{
243 struct inode *inode;
244
245 inode = new_inode(sb);
246 if (!inode)
247 goto out;
248
249 inode->i_uid = ADFS_SB(sb)->s_uid;
250 inode->i_gid = ADFS_SB(sb)->s_gid;
251 inode->i_ino = obj->indaddr;
252 inode->i_size = obj->size;
253 set_nlink(inode, 2);
254 inode->i_blocks = (inode->i_size + sb->s_blocksize - 1) >>
255 sb->s_blocksize_bits;
256
257 /*
258 * we need to save the parent directory ID so that
259 * write_inode can update the directory information
260 * for this file. This will need special handling
261 * for cross-directory renames.
262 */
263 ADFS_I(inode)->parent_id = obj->parent_id;
264 ADFS_I(inode)->indaddr = obj->indaddr;
265 ADFS_I(inode)->loadaddr = obj->loadaddr;
266 ADFS_I(inode)->execaddr = obj->execaddr;
267 ADFS_I(inode)->attr = obj->attr;
268
269 inode->i_mode = adfs_atts2mode(sb, inode);
270 adfs_adfs2unix_time(&inode->i_mtime, inode);
271 inode->i_atime = inode->i_mtime;
272 inode->i_ctime = inode->i_mtime;
273
274 if (S_ISDIR(inode->i_mode)) {
275 inode->i_op = &adfs_dir_inode_operations;
276 inode->i_fop = &adfs_dir_operations;
277 } else if (S_ISREG(inode->i_mode)) {
278 inode->i_op = &adfs_file_inode_operations;
279 inode->i_fop = &adfs_file_operations;
280 inode->i_mapping->a_ops = &adfs_aops;
281 ADFS_I(inode)->mmu_private = inode->i_size;
282 }
283
284 inode_fake_hash(inode);
285
286out:
287 return inode;
288}
289
290/*
291 * Validate and convert a changed access mode/time to their ADFS equivalents.
292 * adfs_write_inode will actually write the information back to the directory
293 * later.
294 */
295int
296adfs_notify_change(struct user_namespace *mnt_userns, struct dentry *dentry,
297 struct iattr *attr)
298{
299 struct inode *inode = d_inode(dentry);
300 struct super_block *sb = inode->i_sb;
301 unsigned int ia_valid = attr->ia_valid;
302 int error;
303
304 error = setattr_prepare(&init_user_ns, dentry, attr);
305
306 /*
307 * we can't change the UID or GID of any file -
308 * we have a global UID/GID in the superblock
309 */
310 if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, ADFS_SB(sb)->s_uid)) ||
311 (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, ADFS_SB(sb)->s_gid)))
312 error = -EPERM;
313
314 if (error)
315 goto out;
316
317 /* XXX: this is missing some actual on-disk truncation.. */
318 if (ia_valid & ATTR_SIZE)
319 truncate_setsize(inode, attr->ia_size);
320
321 if (ia_valid & ATTR_MTIME && adfs_inode_is_stamped(inode)) {
322 adfs_unix2adfs_time(inode, &attr->ia_mtime);
323 adfs_adfs2unix_time(&inode->i_mtime, inode);
324 }
325
326 /*
327 * FIXME: should we make these == to i_mtime since we don't
328 * have the ability to represent them in our filesystem?
329 */
330 if (ia_valid & ATTR_ATIME)
331 inode->i_atime = attr->ia_atime;
332 if (ia_valid & ATTR_CTIME)
333 inode->i_ctime = attr->ia_ctime;
334 if (ia_valid & ATTR_MODE) {
335 ADFS_I(inode)->attr = adfs_mode2atts(sb, inode, attr->ia_mode);
336 inode->i_mode = adfs_atts2mode(sb, inode);
337 }
338
339 /*
340 * FIXME: should we be marking this inode dirty even if
341 * we don't have any metadata to write back?
342 */
343 if (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MODE))
344 mark_inode_dirty(inode);
345out:
346 return error;
347}
348
349/*
350 * write an existing inode back to the directory, and therefore the disk.
351 * The adfs-specific inode data has already been updated by
352 * adfs_notify_change()
353 */
354int adfs_write_inode(struct inode *inode, struct writeback_control *wbc)
355{
356 struct super_block *sb = inode->i_sb;
357 struct object_info obj;
358 int ret;
359
360 obj.indaddr = ADFS_I(inode)->indaddr;
361 obj.name_len = 0;
362 obj.parent_id = ADFS_I(inode)->parent_id;
363 obj.loadaddr = ADFS_I(inode)->loadaddr;
364 obj.execaddr = ADFS_I(inode)->execaddr;
365 obj.attr = ADFS_I(inode)->attr;
366 obj.size = inode->i_size;
367
368 ret = adfs_dir_update(sb, &obj, wbc->sync_mode == WB_SYNC_ALL);
369 return ret;
370}