1 /* 1 /*
2 FUSE: Filesystem in Userspace 2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2008 Miklos Szeredi <mik 3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
4 4
5 This program can be distributed under the te 5 This program can be distributed under the terms of the GNU GPL.
6 See the file COPYING. 6 See the file COPYING.
7 */ 7 */
8 8
9 #include "fuse_i.h" 9 #include "fuse_i.h"
10 10
11 #include <linux/pagemap.h> 11 #include <linux/pagemap.h>
12 #include <linux/file.h> 12 #include <linux/file.h>
13 #include <linux/fs_context.h> <<
14 #include <linux/moduleparam.h> <<
15 #include <linux/sched.h> 13 #include <linux/sched.h>
16 #include <linux/namei.h> 14 #include <linux/namei.h>
17 #include <linux/slab.h> 15 #include <linux/slab.h>
18 #include <linux/xattr.h> 16 #include <linux/xattr.h>
19 #include <linux/iversion.h> 17 #include <linux/iversion.h>
20 #include <linux/posix_acl.h> 18 #include <linux/posix_acl.h>
21 #include <linux/security.h> <<
22 #include <linux/types.h> <<
23 #include <linux/kernel.h> <<
24 <<
25 static bool __read_mostly allow_sys_admin_acce <<
26 module_param(allow_sys_admin_access, bool, 064 <<
27 MODULE_PARM_DESC(allow_sys_admin_access, <<
28 "Allow users with CAP_SYS_ADM <<
29 19
30 static void fuse_advise_use_readdirplus(struct 20 static void fuse_advise_use_readdirplus(struct inode *dir)
31 { 21 {
32 struct fuse_inode *fi = get_fuse_inode 22 struct fuse_inode *fi = get_fuse_inode(dir);
33 23
34 set_bit(FUSE_I_ADVISE_RDPLUS, &fi->sta 24 set_bit(FUSE_I_ADVISE_RDPLUS, &fi->state);
35 } 25 }
36 26
37 #if BITS_PER_LONG >= 64 27 #if BITS_PER_LONG >= 64
38 static inline void __fuse_dentry_settime(struc 28 static inline void __fuse_dentry_settime(struct dentry *entry, u64 time)
39 { 29 {
40 entry->d_fsdata = (void *) time; 30 entry->d_fsdata = (void *) time;
41 } 31 }
42 32
43 static inline u64 fuse_dentry_time(const struc 33 static inline u64 fuse_dentry_time(const struct dentry *entry)
44 { 34 {
45 return (u64)entry->d_fsdata; 35 return (u64)entry->d_fsdata;
46 } 36 }
47 37
48 #else 38 #else
49 union fuse_dentry { 39 union fuse_dentry {
50 u64 time; 40 u64 time;
51 struct rcu_head rcu; 41 struct rcu_head rcu;
52 }; 42 };
53 43
54 static inline void __fuse_dentry_settime(struc 44 static inline void __fuse_dentry_settime(struct dentry *dentry, u64 time)
55 { 45 {
56 ((union fuse_dentry *) dentry->d_fsdat 46 ((union fuse_dentry *) dentry->d_fsdata)->time = time;
57 } 47 }
58 48
59 static inline u64 fuse_dentry_time(const struc 49 static inline u64 fuse_dentry_time(const struct dentry *entry)
60 { 50 {
61 return ((union fuse_dentry *) entry->d 51 return ((union fuse_dentry *) entry->d_fsdata)->time;
62 } 52 }
63 #endif 53 #endif
64 54
65 static void fuse_dentry_settime(struct dentry 55 static void fuse_dentry_settime(struct dentry *dentry, u64 time)
66 { 56 {
67 struct fuse_conn *fc = get_fuse_conn_s 57 struct fuse_conn *fc = get_fuse_conn_super(dentry->d_sb);
68 bool delete = !time && fc->delete_stal 58 bool delete = !time && fc->delete_stale;
69 /* 59 /*
70 * Mess with DCACHE_OP_DELETE because 60 * Mess with DCACHE_OP_DELETE because dput() will be faster without it.
71 * Don't care about races, either way 61 * Don't care about races, either way it's just an optimization
72 */ 62 */
73 if ((!delete && (dentry->d_flags & DCA 63 if ((!delete && (dentry->d_flags & DCACHE_OP_DELETE)) ||
74 (delete && !(dentry->d_flags & DCA 64 (delete && !(dentry->d_flags & DCACHE_OP_DELETE))) {
75 spin_lock(&dentry->d_lock); 65 spin_lock(&dentry->d_lock);
76 if (!delete) 66 if (!delete)
77 dentry->d_flags &= ~DC 67 dentry->d_flags &= ~DCACHE_OP_DELETE;
78 else 68 else
79 dentry->d_flags |= DCA 69 dentry->d_flags |= DCACHE_OP_DELETE;
80 spin_unlock(&dentry->d_lock); 70 spin_unlock(&dentry->d_lock);
81 } 71 }
82 72
83 __fuse_dentry_settime(dentry, time); 73 __fuse_dentry_settime(dentry, time);
84 } 74 }
85 75
86 /* 76 /*
87 * FUSE caches dentries and attributes with se 77 * FUSE caches dentries and attributes with separate timeout. The
88 * time in jiffies until the dentry/attributes 78 * time in jiffies until the dentry/attributes are valid is stored in
89 * dentry->d_fsdata and fuse_inode->i_time res 79 * dentry->d_fsdata and fuse_inode->i_time respectively.
90 */ 80 */
91 81
92 /* 82 /*
93 * Calculate the time in jiffies until a dentr 83 * Calculate the time in jiffies until a dentry/attributes are valid
94 */ 84 */
95 u64 fuse_time_to_jiffies(u64 sec, u32 nsec) !! 85 static u64 time_to_jiffies(u64 sec, u32 nsec)
96 { 86 {
97 if (sec || nsec) { 87 if (sec || nsec) {
98 struct timespec64 ts = { 88 struct timespec64 ts = {
99 sec, 89 sec,
100 min_t(u32, nsec, NSEC_ 90 min_t(u32, nsec, NSEC_PER_SEC - 1)
101 }; 91 };
102 92
103 return get_jiffies_64() + time 93 return get_jiffies_64() + timespec64_to_jiffies(&ts);
104 } else 94 } else
105 return 0; 95 return 0;
106 } 96 }
107 97
108 /* 98 /*
109 * Set dentry and possibly attribute timeouts 99 * Set dentry and possibly attribute timeouts from the lookup/mk*
110 * replies 100 * replies
111 */ 101 */
112 void fuse_change_entry_timeout(struct dentry * 102 void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o)
113 { 103 {
114 fuse_dentry_settime(entry, 104 fuse_dentry_settime(entry,
115 fuse_time_to_jiffies(o->entry_ !! 105 time_to_jiffies(o->entry_valid, o->entry_valid_nsec));
116 } 106 }
117 107
118 void fuse_invalidate_attr_mask(struct inode *i !! 108 static u64 attr_timeout(struct fuse_attr_out *o)
>> 109 {
>> 110 return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
>> 111 }
>> 112
>> 113 u64 entry_attr_timeout(struct fuse_entry_out *o)
>> 114 {
>> 115 return time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
>> 116 }
>> 117
>> 118 static void fuse_invalidate_attr_mask(struct inode *inode, u32 mask)
119 { 119 {
120 set_mask_bits(&get_fuse_inode(inode)-> 120 set_mask_bits(&get_fuse_inode(inode)->inval_mask, 0, mask);
121 } 121 }
122 122
123 /* 123 /*
124 * Mark the attributes as stale, so that at th 124 * Mark the attributes as stale, so that at the next call to
125 * ->getattr() they will be fetched from users 125 * ->getattr() they will be fetched from userspace
126 */ 126 */
127 void fuse_invalidate_attr(struct inode *inode) 127 void fuse_invalidate_attr(struct inode *inode)
128 { 128 {
129 fuse_invalidate_attr_mask(inode, STATX 129 fuse_invalidate_attr_mask(inode, STATX_BASIC_STATS);
130 } 130 }
131 131
132 static void fuse_dir_changed(struct inode *dir 132 static void fuse_dir_changed(struct inode *dir)
133 { 133 {
134 fuse_invalidate_attr(dir); 134 fuse_invalidate_attr(dir);
135 inode_maybe_inc_iversion(dir, false); 135 inode_maybe_inc_iversion(dir, false);
136 } 136 }
137 137
138 /* !! 138 /**
139 * Mark the attributes as stale due to an atim 139 * Mark the attributes as stale due to an atime change. Avoid the invalidate if
140 * atime is not used. 140 * atime is not used.
141 */ 141 */
142 void fuse_invalidate_atime(struct inode *inode 142 void fuse_invalidate_atime(struct inode *inode)
143 { 143 {
144 if (!IS_RDONLY(inode)) 144 if (!IS_RDONLY(inode))
145 fuse_invalidate_attr_mask(inod 145 fuse_invalidate_attr_mask(inode, STATX_ATIME);
146 } 146 }
147 147
148 /* 148 /*
149 * Just mark the entry as stale, so that a nex 149 * Just mark the entry as stale, so that a next attempt to look it up
150 * will result in a new lookup call to userspa 150 * will result in a new lookup call to userspace
151 * 151 *
152 * This is called when a dentry is about to be 152 * This is called when a dentry is about to become negative and the
153 * timeout is unknown (unlink, rmdir, rename a 153 * timeout is unknown (unlink, rmdir, rename and in some cases
154 * lookup) 154 * lookup)
155 */ 155 */
156 void fuse_invalidate_entry_cache(struct dentry 156 void fuse_invalidate_entry_cache(struct dentry *entry)
157 { 157 {
158 fuse_dentry_settime(entry, 0); 158 fuse_dentry_settime(entry, 0);
159 } 159 }
160 160
161 /* 161 /*
162 * Same as fuse_invalidate_entry_cache(), but 162 * Same as fuse_invalidate_entry_cache(), but also try to remove the
163 * dentry from the hash 163 * dentry from the hash
164 */ 164 */
165 static void fuse_invalidate_entry(struct dentr 165 static void fuse_invalidate_entry(struct dentry *entry)
166 { 166 {
167 d_invalidate(entry); 167 d_invalidate(entry);
168 fuse_invalidate_entry_cache(entry); 168 fuse_invalidate_entry_cache(entry);
169 } 169 }
170 170
171 static void fuse_lookup_init(struct fuse_conn 171 static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_args *args,
172 u64 nodeid, const 172 u64 nodeid, const struct qstr *name,
173 struct fuse_entry 173 struct fuse_entry_out *outarg)
174 { 174 {
175 memset(outarg, 0, sizeof(struct fuse_e 175 memset(outarg, 0, sizeof(struct fuse_entry_out));
176 args->opcode = FUSE_LOOKUP; 176 args->opcode = FUSE_LOOKUP;
177 args->nodeid = nodeid; 177 args->nodeid = nodeid;
178 args->in_numargs = 1; 178 args->in_numargs = 1;
179 args->in_args[0].size = name->len + 1; 179 args->in_args[0].size = name->len + 1;
180 args->in_args[0].value = name->name; 180 args->in_args[0].value = name->name;
181 args->out_numargs = 1; 181 args->out_numargs = 1;
182 args->out_args[0].size = sizeof(struct 182 args->out_args[0].size = sizeof(struct fuse_entry_out);
183 args->out_args[0].value = outarg; 183 args->out_args[0].value = outarg;
184 } 184 }
185 185
186 /* 186 /*
187 * Check whether the dentry is still valid 187 * Check whether the dentry is still valid
188 * 188 *
189 * If the entry validity timeout has expired a 189 * If the entry validity timeout has expired and the dentry is
190 * positive, try to redo the lookup. If the l 190 * positive, try to redo the lookup. If the lookup results in a
191 * different inode, then let the VFS invalidat 191 * different inode, then let the VFS invalidate the dentry and redo
192 * the lookup once more. If the lookup result 192 * the lookup once more. If the lookup results in the same inode,
193 * then refresh the attributes, timeouts and m 193 * then refresh the attributes, timeouts and mark the dentry valid.
194 */ 194 */
195 static int fuse_dentry_revalidate(struct dentr 195 static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
196 { 196 {
197 struct inode *inode; 197 struct inode *inode;
198 struct dentry *parent; 198 struct dentry *parent;
199 struct fuse_mount *fm; !! 199 struct fuse_conn *fc;
200 struct fuse_inode *fi; 200 struct fuse_inode *fi;
201 int ret; 201 int ret;
202 202
203 inode = d_inode_rcu(entry); 203 inode = d_inode_rcu(entry);
204 if (inode && fuse_is_bad(inode)) !! 204 if (inode && is_bad_inode(inode))
205 goto invalid; 205 goto invalid;
206 else if (time_before64(fuse_dentry_tim 206 else if (time_before64(fuse_dentry_time(entry), get_jiffies_64()) ||
207 (flags & (LOOKUP_EXCL | LOOKU !! 207 (flags & LOOKUP_REVAL)) {
208 struct fuse_entry_out outarg; 208 struct fuse_entry_out outarg;
209 FUSE_ARGS(args); 209 FUSE_ARGS(args);
210 struct fuse_forget_link *forge 210 struct fuse_forget_link *forget;
211 u64 attr_version; 211 u64 attr_version;
212 212
213 /* For negative dentries, alwa 213 /* For negative dentries, always do a fresh lookup */
214 if (!inode) 214 if (!inode)
215 goto invalid; 215 goto invalid;
216 216
217 ret = -ECHILD; 217 ret = -ECHILD;
218 if (flags & LOOKUP_RCU) 218 if (flags & LOOKUP_RCU)
219 goto out; 219 goto out;
220 220
221 fm = get_fuse_mount(inode); !! 221 fc = get_fuse_conn(inode);
222 222
223 forget = fuse_alloc_forget(); 223 forget = fuse_alloc_forget();
224 ret = -ENOMEM; 224 ret = -ENOMEM;
225 if (!forget) 225 if (!forget)
226 goto out; 226 goto out;
227 227
228 attr_version = fuse_get_attr_v !! 228 attr_version = fuse_get_attr_version(fc);
229 229
230 parent = dget_parent(entry); 230 parent = dget_parent(entry);
231 fuse_lookup_init(fm->fc, &args !! 231 fuse_lookup_init(fc, &args, get_node_id(d_inode(parent)),
232 &entry->d_nam 232 &entry->d_name, &outarg);
233 ret = fuse_simple_request(fm, !! 233 ret = fuse_simple_request(fc, &args);
234 dput(parent); 234 dput(parent);
235 /* Zero nodeid is same as -ENO 235 /* Zero nodeid is same as -ENOENT */
236 if (!ret && !outarg.nodeid) 236 if (!ret && !outarg.nodeid)
237 ret = -ENOENT; 237 ret = -ENOENT;
238 if (!ret) { 238 if (!ret) {
239 fi = get_fuse_inode(in 239 fi = get_fuse_inode(inode);
240 if (outarg.nodeid != g !! 240 if (outarg.nodeid != get_node_id(inode)) {
241 (bool) IS_AUTOMOUN !! 241 fuse_queue_forget(fc, forget, outarg.nodeid, 1);
242 fuse_queue_for <<
243 <<
244 goto invalid; 242 goto invalid;
245 } 243 }
246 spin_lock(&fi->lock); 244 spin_lock(&fi->lock);
247 fi->nlookup++; 245 fi->nlookup++;
248 spin_unlock(&fi->lock) 246 spin_unlock(&fi->lock);
249 } 247 }
250 kfree(forget); 248 kfree(forget);
251 if (ret == -ENOMEM || ret == - !! 249 if (ret == -ENOMEM)
252 goto out; 250 goto out;
253 if (ret || fuse_invalid_attr(& 251 if (ret || fuse_invalid_attr(&outarg.attr) ||
254 fuse_stale_inode(inode, ou !! 252 (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
255 goto invalid; 253 goto invalid;
256 254
257 forget_all_cached_acls(inode); 255 forget_all_cached_acls(inode);
258 fuse_change_attributes(inode, !! 256 fuse_change_attributes(inode, &outarg.attr,
259 ATTR_TI !! 257 entry_attr_timeout(&outarg),
260 attr_ve 258 attr_version);
261 fuse_change_entry_timeout(entr 259 fuse_change_entry_timeout(entry, &outarg);
262 } else if (inode) { 260 } else if (inode) {
263 fi = get_fuse_inode(inode); 261 fi = get_fuse_inode(inode);
264 if (flags & LOOKUP_RCU) { 262 if (flags & LOOKUP_RCU) {
265 if (test_bit(FUSE_I_IN 263 if (test_bit(FUSE_I_INIT_RDPLUS, &fi->state))
266 return -ECHILD 264 return -ECHILD;
267 } else if (test_and_clear_bit( 265 } else if (test_and_clear_bit(FUSE_I_INIT_RDPLUS, &fi->state)) {
268 parent = dget_parent(e 266 parent = dget_parent(entry);
269 fuse_advise_use_readdi 267 fuse_advise_use_readdirplus(d_inode(parent));
270 dput(parent); 268 dput(parent);
271 } 269 }
272 } 270 }
273 ret = 1; 271 ret = 1;
274 out: 272 out:
275 return ret; 273 return ret;
276 274
277 invalid: 275 invalid:
278 ret = 0; 276 ret = 0;
279 goto out; 277 goto out;
280 } 278 }
281 279
282 #if BITS_PER_LONG < 64 280 #if BITS_PER_LONG < 64
283 static int fuse_dentry_init(struct dentry *den 281 static int fuse_dentry_init(struct dentry *dentry)
284 { 282 {
285 dentry->d_fsdata = kzalloc(sizeof(unio 283 dentry->d_fsdata = kzalloc(sizeof(union fuse_dentry),
286 GFP_KERNEL_ 284 GFP_KERNEL_ACCOUNT | __GFP_RECLAIMABLE);
287 285
288 return dentry->d_fsdata ? 0 : -ENOMEM; 286 return dentry->d_fsdata ? 0 : -ENOMEM;
289 } 287 }
290 static void fuse_dentry_release(struct dentry 288 static void fuse_dentry_release(struct dentry *dentry)
291 { 289 {
292 union fuse_dentry *fd = dentry->d_fsda 290 union fuse_dentry *fd = dentry->d_fsdata;
293 291
294 kfree_rcu(fd, rcu); 292 kfree_rcu(fd, rcu);
295 } 293 }
296 #endif 294 #endif
297 295
298 static int fuse_dentry_delete(const struct den 296 static int fuse_dentry_delete(const struct dentry *dentry)
299 { 297 {
300 return time_before64(fuse_dentry_time( 298 return time_before64(fuse_dentry_time(dentry), get_jiffies_64());
301 } 299 }
302 300
303 /* <<
304 * Create a fuse_mount object with a new super <<
305 * as the root), and return that mount so it c <<
306 * @path. <<
307 */ <<
308 static struct vfsmount *fuse_dentry_automount( <<
309 { <<
310 struct fs_context *fsc; <<
311 struct vfsmount *mnt; <<
312 struct fuse_inode *mp_fi = get_fuse_in <<
313 <<
314 fsc = fs_context_for_submount(path->mn <<
315 if (IS_ERR(fsc)) <<
316 return ERR_CAST(fsc); <<
317 <<
318 /* Pass the FUSE inode of the mount fo <<
319 fsc->fs_private = mp_fi; <<
320 <<
321 /* Create the submount */ <<
322 mnt = fc_mount(fsc); <<
323 if (!IS_ERR(mnt)) <<
324 mntget(mnt); <<
325 <<
326 put_fs_context(fsc); <<
327 return mnt; <<
328 } <<
329 <<
330 const struct dentry_operations fuse_dentry_ope 301 const struct dentry_operations fuse_dentry_operations = {
331 .d_revalidate = fuse_dentry_revalida 302 .d_revalidate = fuse_dentry_revalidate,
332 .d_delete = fuse_dentry_delete, 303 .d_delete = fuse_dentry_delete,
333 #if BITS_PER_LONG < 64 304 #if BITS_PER_LONG < 64
334 .d_init = fuse_dentry_init, 305 .d_init = fuse_dentry_init,
335 .d_release = fuse_dentry_release, 306 .d_release = fuse_dentry_release,
336 #endif 307 #endif
337 .d_automount = fuse_dentry_automoun <<
338 }; 308 };
339 309
340 const struct dentry_operations fuse_root_dentr 310 const struct dentry_operations fuse_root_dentry_operations = {
341 #if BITS_PER_LONG < 64 311 #if BITS_PER_LONG < 64
342 .d_init = fuse_dentry_init, 312 .d_init = fuse_dentry_init,
343 .d_release = fuse_dentry_release, 313 .d_release = fuse_dentry_release,
344 #endif 314 #endif
345 }; 315 };
346 316
347 int fuse_valid_type(int m) 317 int fuse_valid_type(int m)
348 { 318 {
349 return S_ISREG(m) || S_ISDIR(m) || S_I 319 return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) ||
350 S_ISBLK(m) || S_ISFIFO(m) || S 320 S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m);
351 } 321 }
352 322
353 static bool fuse_valid_size(u64 size) <<
354 { <<
355 return size <= LLONG_MAX; <<
356 } <<
357 <<
358 bool fuse_invalid_attr(struct fuse_attr *attr) 323 bool fuse_invalid_attr(struct fuse_attr *attr)
359 { 324 {
360 return !fuse_valid_type(attr->mode) || !! 325 return !fuse_valid_type(attr->mode) ||
>> 326 attr->size > LLONG_MAX;
361 } 327 }
362 328
363 int fuse_lookup_name(struct super_block *sb, u 329 int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name,
364 struct fuse_entry_out *ou 330 struct fuse_entry_out *outarg, struct inode **inode)
365 { 331 {
366 struct fuse_mount *fm = get_fuse_mount !! 332 struct fuse_conn *fc = get_fuse_conn_super(sb);
367 FUSE_ARGS(args); 333 FUSE_ARGS(args);
368 struct fuse_forget_link *forget; 334 struct fuse_forget_link *forget;
369 u64 attr_version; 335 u64 attr_version;
370 int err; 336 int err;
371 337
372 *inode = NULL; 338 *inode = NULL;
373 err = -ENAMETOOLONG; 339 err = -ENAMETOOLONG;
374 if (name->len > FUSE_NAME_MAX) 340 if (name->len > FUSE_NAME_MAX)
375 goto out; 341 goto out;
376 342
377 343
378 forget = fuse_alloc_forget(); 344 forget = fuse_alloc_forget();
379 err = -ENOMEM; 345 err = -ENOMEM;
380 if (!forget) 346 if (!forget)
381 goto out; 347 goto out;
382 348
383 attr_version = fuse_get_attr_version(f !! 349 attr_version = fuse_get_attr_version(fc);
384 350
385 fuse_lookup_init(fm->fc, &args, nodeid !! 351 fuse_lookup_init(fc, &args, nodeid, name, outarg);
386 err = fuse_simple_request(fm, &args); !! 352 err = fuse_simple_request(fc, &args);
387 /* Zero nodeid is same as -ENOENT, but 353 /* Zero nodeid is same as -ENOENT, but with valid timeout */
388 if (err || !outarg->nodeid) 354 if (err || !outarg->nodeid)
389 goto out_put_forget; 355 goto out_put_forget;
390 356
391 err = -EIO; 357 err = -EIO;
>> 358 if (!outarg->nodeid)
>> 359 goto out_put_forget;
392 if (fuse_invalid_attr(&outarg->attr)) 360 if (fuse_invalid_attr(&outarg->attr))
393 goto out_put_forget; 361 goto out_put_forget;
394 if (outarg->nodeid == FUSE_ROOT_ID && <<
395 pr_warn_once("root generation <<
396 outarg->generation = 0; <<
397 } <<
398 362
399 *inode = fuse_iget(sb, outarg->nodeid, 363 *inode = fuse_iget(sb, outarg->nodeid, outarg->generation,
400 &outarg->attr, ATTR !! 364 &outarg->attr, entry_attr_timeout(outarg),
401 attr_version); 365 attr_version);
402 err = -ENOMEM; 366 err = -ENOMEM;
403 if (!*inode) { 367 if (!*inode) {
404 fuse_queue_forget(fm->fc, forg !! 368 fuse_queue_forget(fc, forget, outarg->nodeid, 1);
405 goto out; 369 goto out;
406 } 370 }
407 err = 0; 371 err = 0;
408 372
409 out_put_forget: 373 out_put_forget:
410 kfree(forget); 374 kfree(forget);
411 out: 375 out:
412 return err; 376 return err;
413 } 377 }
414 378
415 static struct dentry *fuse_lookup(struct inode 379 static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
416 unsigned int 380 unsigned int flags)
417 { 381 {
418 int err; 382 int err;
419 struct fuse_entry_out outarg; 383 struct fuse_entry_out outarg;
420 struct inode *inode; 384 struct inode *inode;
421 struct dentry *newent; 385 struct dentry *newent;
422 bool outarg_valid = true; 386 bool outarg_valid = true;
423 bool locked; 387 bool locked;
424 388
425 if (fuse_is_bad(dir)) <<
426 return ERR_PTR(-EIO); <<
427 <<
428 locked = fuse_lock_inode(dir); 389 locked = fuse_lock_inode(dir);
429 err = fuse_lookup_name(dir->i_sb, get_ 390 err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
430 &outarg, &inode 391 &outarg, &inode);
431 fuse_unlock_inode(dir, locked); 392 fuse_unlock_inode(dir, locked);
432 if (err == -ENOENT) { 393 if (err == -ENOENT) {
433 outarg_valid = false; 394 outarg_valid = false;
434 err = 0; 395 err = 0;
435 } 396 }
436 if (err) 397 if (err)
437 goto out_err; 398 goto out_err;
438 399
439 err = -EIO; 400 err = -EIO;
440 if (inode && get_node_id(inode) == FUS 401 if (inode && get_node_id(inode) == FUSE_ROOT_ID)
441 goto out_iput; 402 goto out_iput;
442 403
443 newent = d_splice_alias(inode, entry); 404 newent = d_splice_alias(inode, entry);
444 err = PTR_ERR(newent); 405 err = PTR_ERR(newent);
445 if (IS_ERR(newent)) 406 if (IS_ERR(newent))
446 goto out_err; 407 goto out_err;
447 408
448 entry = newent ? newent : entry; 409 entry = newent ? newent : entry;
449 if (outarg_valid) 410 if (outarg_valid)
450 fuse_change_entry_timeout(entr 411 fuse_change_entry_timeout(entry, &outarg);
451 else 412 else
452 fuse_invalidate_entry_cache(en 413 fuse_invalidate_entry_cache(entry);
453 414
454 if (inode) 415 if (inode)
455 fuse_advise_use_readdirplus(di 416 fuse_advise_use_readdirplus(dir);
456 return newent; 417 return newent;
457 418
458 out_iput: 419 out_iput:
459 iput(inode); 420 iput(inode);
460 out_err: 421 out_err:
461 return ERR_PTR(err); 422 return ERR_PTR(err);
462 } 423 }
463 424
464 static int get_security_context(struct dentry <<
465 struct fuse_in <<
466 { <<
467 struct fuse_secctx *fctx; <<
468 struct fuse_secctx_header *header; <<
469 void *ctx = NULL, *ptr; <<
470 u32 ctxlen, total_len = sizeof(*header <<
471 int err, nr_ctx = 0; <<
472 const char *name; <<
473 size_t namelen; <<
474 <<
475 err = security_dentry_init_security(en <<
476 &n <<
477 if (err) { <<
478 if (err != -EOPNOTSUPP) <<
479 goto out_err; <<
480 /* No LSM is supporting this s <<
481 ctxlen = 0; <<
482 ctx = NULL; <<
483 } <<
484 <<
485 if (ctxlen) { <<
486 nr_ctx = 1; <<
487 namelen = strlen(name) + 1; <<
488 err = -EIO; <<
489 if (WARN_ON(namelen > XATTR_NA <<
490 goto out_err; <<
491 total_len += FUSE_REC_ALIGN(si <<
492 } <<
493 <<
494 err = -ENOMEM; <<
495 header = ptr = kzalloc(total_len, GFP_ <<
496 if (!ptr) <<
497 goto out_err; <<
498 <<
499 header->nr_secctx = nr_ctx; <<
500 header->size = total_len; <<
501 ptr += sizeof(*header); <<
502 if (nr_ctx) { <<
503 fctx = ptr; <<
504 fctx->size = ctxlen; <<
505 ptr += sizeof(*fctx); <<
506 <<
507 strcpy(ptr, name); <<
508 ptr += namelen; <<
509 <<
510 memcpy(ptr, ctx, ctxlen); <<
511 } <<
512 ext->size = total_len; <<
513 ext->value = header; <<
514 err = 0; <<
515 out_err: <<
516 kfree(ctx); <<
517 return err; <<
518 } <<
519 <<
520 static void *extend_arg(struct fuse_in_arg *bu <<
521 { <<
522 void *p; <<
523 u32 newlen = buf->size + bytes; <<
524 <<
525 p = krealloc(buf->value, newlen, GFP_K <<
526 if (!p) { <<
527 kfree(buf->value); <<
528 buf->size = 0; <<
529 buf->value = NULL; <<
530 return NULL; <<
531 } <<
532 <<
533 memset(p + buf->size, 0, bytes); <<
534 buf->value = p; <<
535 buf->size = newlen; <<
536 <<
537 return p + newlen - bytes; <<
538 } <<
539 <<
540 static u32 fuse_ext_size(size_t size) <<
541 { <<
542 return FUSE_REC_ALIGN(sizeof(struct fu <<
543 } <<
544 <<
545 /* <<
546 * This adds just a single supplementary group <<
547 */ <<
548 static int get_create_supp_group(struct inode <<
549 { <<
550 struct fuse_conn *fc = get_fuse_conn(d <<
551 struct fuse_ext_header *xh; <<
552 struct fuse_supp_groups *sg; <<
553 kgid_t kgid = dir->i_gid; <<
554 gid_t parent_gid = from_kgid(fc->user_ <<
555 u32 sg_len = fuse_ext_size(sizeof(*sg) <<
556 <<
557 if (parent_gid == (gid_t) -1 || gid_eq <<
558 !in_group_p(kgid)) <<
559 return 0; <<
560 <<
561 xh = extend_arg(ext, sg_len); <<
562 if (!xh) <<
563 return -ENOMEM; <<
564 <<
565 xh->size = sg_len; <<
566 xh->type = FUSE_EXT_GROUPS; <<
567 <<
568 sg = (struct fuse_supp_groups *) &xh[1 <<
569 sg->nr_groups = 1; <<
570 sg->groups[0] = parent_gid; <<
571 <<
572 return 0; <<
573 } <<
574 <<
575 static int get_create_ext(struct fuse_args *ar <<
576 struct inode *dir, s <<
577 umode_t mode) <<
578 { <<
579 struct fuse_conn *fc = get_fuse_conn_s <<
580 struct fuse_in_arg ext = { .size = 0, <<
581 int err = 0; <<
582 <<
583 if (fc->init_security) <<
584 err = get_security_context(den <<
585 if (!err && fc->create_supp_group) <<
586 err = get_create_supp_group(di <<
587 <<
588 if (!err && ext.size) { <<
589 WARN_ON(args->in_numargs >= AR <<
590 args->is_ext = true; <<
591 args->ext_idx = args->in_numar <<
592 args->in_args[args->ext_idx] = <<
593 } else { <<
594 kfree(ext.value); <<
595 } <<
596 <<
597 return err; <<
598 } <<
599 <<
600 static void free_ext_value(struct fuse_args *a <<
601 { <<
602 if (args->is_ext) <<
603 kfree(args->in_args[args->ext_ <<
604 } <<
605 <<
606 /* 425 /*
607 * Atomic create+open operation 426 * Atomic create+open operation
608 * 427 *
609 * If the filesystem doesn't support this, the 428 * If the filesystem doesn't support this, then fall back to separate
610 * 'mknod' + 'open' requests. 429 * 'mknod' + 'open' requests.
611 */ 430 */
612 static int fuse_create_open(struct inode *dir, 431 static int fuse_create_open(struct inode *dir, struct dentry *entry,
613 struct file *file, !! 432 struct file *file, unsigned flags,
614 umode_t mode, u32 !! 433 umode_t mode)
615 { 434 {
616 int err; 435 int err;
617 struct inode *inode; 436 struct inode *inode;
618 struct fuse_mount *fm = get_fuse_mount !! 437 struct fuse_conn *fc = get_fuse_conn(dir);
619 FUSE_ARGS(args); 438 FUSE_ARGS(args);
620 struct fuse_forget_link *forget; 439 struct fuse_forget_link *forget;
621 struct fuse_create_in inarg; 440 struct fuse_create_in inarg;
622 struct fuse_open_out *outopenp; !! 441 struct fuse_open_out outopen;
623 struct fuse_entry_out outentry; 442 struct fuse_entry_out outentry;
624 struct fuse_inode *fi; 443 struct fuse_inode *fi;
625 struct fuse_file *ff; 444 struct fuse_file *ff;
626 bool trunc = flags & O_TRUNC; <<
627 445
628 /* Userspace expects S_IFREG in create 446 /* Userspace expects S_IFREG in create mode */
629 BUG_ON((mode & S_IFMT) != S_IFREG); 447 BUG_ON((mode & S_IFMT) != S_IFREG);
630 448
631 forget = fuse_alloc_forget(); 449 forget = fuse_alloc_forget();
632 err = -ENOMEM; 450 err = -ENOMEM;
633 if (!forget) 451 if (!forget)
634 goto out_err; 452 goto out_err;
635 453
636 err = -ENOMEM; 454 err = -ENOMEM;
637 ff = fuse_file_alloc(fm, true); !! 455 ff = fuse_file_alloc(fc);
638 if (!ff) 456 if (!ff)
639 goto out_put_forget_req; 457 goto out_put_forget_req;
640 458
641 if (!fm->fc->dont_mask) !! 459 if (!fc->dont_mask)
642 mode &= ~current_umask(); 460 mode &= ~current_umask();
643 461
644 flags &= ~O_NOCTTY; 462 flags &= ~O_NOCTTY;
645 memset(&inarg, 0, sizeof(inarg)); 463 memset(&inarg, 0, sizeof(inarg));
646 memset(&outentry, 0, sizeof(outentry)) 464 memset(&outentry, 0, sizeof(outentry));
647 inarg.flags = flags; 465 inarg.flags = flags;
648 inarg.mode = mode; 466 inarg.mode = mode;
649 inarg.umask = current_umask(); 467 inarg.umask = current_umask();
650 !! 468 args.opcode = FUSE_CREATE;
651 if (fm->fc->handle_killpriv_v2 && trun <<
652 !(flags & O_EXCL) && !capable(CAP_ <<
653 inarg.open_flags |= FUSE_OPEN_ <<
654 } <<
655 <<
656 args.opcode = opcode; <<
657 args.nodeid = get_node_id(dir); 469 args.nodeid = get_node_id(dir);
658 args.in_numargs = 2; 470 args.in_numargs = 2;
659 args.in_args[0].size = sizeof(inarg); 471 args.in_args[0].size = sizeof(inarg);
660 args.in_args[0].value = &inarg; 472 args.in_args[0].value = &inarg;
661 args.in_args[1].size = entry->d_name.l 473 args.in_args[1].size = entry->d_name.len + 1;
662 args.in_args[1].value = entry->d_name. 474 args.in_args[1].value = entry->d_name.name;
663 args.out_numargs = 2; 475 args.out_numargs = 2;
664 args.out_args[0].size = sizeof(outentr 476 args.out_args[0].size = sizeof(outentry);
665 args.out_args[0].value = &outentry; 477 args.out_args[0].value = &outentry;
666 /* Store outarg for fuse_finish_open() !! 478 args.out_args[1].size = sizeof(outopen);
667 outopenp = &ff->args->open_outarg; !! 479 args.out_args[1].value = &outopen;
668 args.out_args[1].size = sizeof(*outope !! 480 err = fuse_simple_request(fc, &args);
669 args.out_args[1].value = outopenp; <<
670 <<
671 err = get_create_ext(&args, dir, entry <<
672 if (err) <<
673 goto out_free_ff; <<
674 <<
675 err = fuse_simple_request(fm, &args); <<
676 free_ext_value(&args); <<
677 if (err) 481 if (err)
678 goto out_free_ff; 482 goto out_free_ff;
679 483
680 err = -EIO; 484 err = -EIO;
681 if (!S_ISREG(outentry.attr.mode) || in 485 if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid) ||
682 fuse_invalid_attr(&outentry.attr)) 486 fuse_invalid_attr(&outentry.attr))
683 goto out_free_ff; 487 goto out_free_ff;
684 488
685 ff->fh = outopenp->fh; !! 489 ff->fh = outopen.fh;
686 ff->nodeid = outentry.nodeid; 490 ff->nodeid = outentry.nodeid;
687 ff->open_flags = outopenp->open_flags; !! 491 ff->open_flags = outopen.open_flags;
688 inode = fuse_iget(dir->i_sb, outentry. 492 inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
689 &outentry.attr, ATTR !! 493 &outentry.attr, entry_attr_timeout(&outentry), 0);
690 if (!inode) { 494 if (!inode) {
691 flags &= ~(O_CREAT | O_EXCL | 495 flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
692 fuse_sync_release(NULL, ff, fl 496 fuse_sync_release(NULL, ff, flags);
693 fuse_queue_forget(fm->fc, forg !! 497 fuse_queue_forget(fc, forget, outentry.nodeid, 1);
694 err = -ENOMEM; 498 err = -ENOMEM;
695 goto out_err; 499 goto out_err;
696 } 500 }
697 kfree(forget); 501 kfree(forget);
698 d_instantiate(entry, inode); 502 d_instantiate(entry, inode);
699 fuse_change_entry_timeout(entry, &oute 503 fuse_change_entry_timeout(entry, &outentry);
700 fuse_dir_changed(dir); 504 fuse_dir_changed(dir);
701 err = generic_file_open(inode, file); !! 505 err = finish_open(file, entry, generic_file_open);
702 if (!err) { <<
703 file->private_data = ff; <<
704 err = finish_open(file, entry, <<
705 } <<
706 if (err) { 506 if (err) {
707 fi = get_fuse_inode(inode); 507 fi = get_fuse_inode(inode);
708 fuse_sync_release(fi, ff, flag 508 fuse_sync_release(fi, ff, flags);
709 } else { 509 } else {
710 if (fm->fc->atomic_o_trunc && !! 510 file->private_data = ff;
711 truncate_pagecache(ino !! 511 fuse_finish_open(inode, file);
712 else if (!(ff->open_flags & FO <<
713 invalidate_inode_pages <<
714 } 512 }
715 return err; 513 return err;
716 514
717 out_free_ff: 515 out_free_ff:
718 fuse_file_free(ff); 516 fuse_file_free(ff);
719 out_put_forget_req: 517 out_put_forget_req:
720 kfree(forget); 518 kfree(forget);
721 out_err: 519 out_err:
722 return err; 520 return err;
723 } 521 }
724 522
725 static int fuse_mknod(struct mnt_idmap *, stru !! 523 static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
726 umode_t, dev_t); <<
727 static int fuse_atomic_open(struct inode *dir, 524 static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
728 struct file *file, 525 struct file *file, unsigned flags,
729 umode_t mode) 526 umode_t mode)
730 { 527 {
731 int err; 528 int err;
732 struct fuse_conn *fc = get_fuse_conn(d 529 struct fuse_conn *fc = get_fuse_conn(dir);
733 struct dentry *res = NULL; 530 struct dentry *res = NULL;
734 531
735 if (fuse_is_bad(dir)) <<
736 return -EIO; <<
737 <<
738 if (d_in_lookup(entry)) { 532 if (d_in_lookup(entry)) {
739 res = fuse_lookup(dir, entry, 533 res = fuse_lookup(dir, entry, 0);
740 if (IS_ERR(res)) 534 if (IS_ERR(res))
741 return PTR_ERR(res); 535 return PTR_ERR(res);
742 536
743 if (res) 537 if (res)
744 entry = res; 538 entry = res;
745 } 539 }
746 540
747 if (!(flags & O_CREAT) || d_really_is_ 541 if (!(flags & O_CREAT) || d_really_is_positive(entry))
748 goto no_open; 542 goto no_open;
749 543
750 /* Only creates */ 544 /* Only creates */
751 file->f_mode |= FMODE_CREATED; 545 file->f_mode |= FMODE_CREATED;
752 546
753 if (fc->no_create) 547 if (fc->no_create)
754 goto mknod; 548 goto mknod;
755 549
756 err = fuse_create_open(dir, entry, fil !! 550 err = fuse_create_open(dir, entry, file, flags, mode);
757 if (err == -ENOSYS) { 551 if (err == -ENOSYS) {
758 fc->no_create = 1; 552 fc->no_create = 1;
759 goto mknod; 553 goto mknod;
760 } else if (err == -EEXIST) !! 554 }
761 fuse_invalidate_entry(entry); <<
762 out_dput: 555 out_dput:
763 dput(res); 556 dput(res);
764 return err; 557 return err;
765 558
766 mknod: 559 mknod:
767 err = fuse_mknod(&nop_mnt_idmap, dir, !! 560 err = fuse_mknod(dir, entry, mode, 0);
768 if (err) 561 if (err)
769 goto out_dput; 562 goto out_dput;
770 no_open: 563 no_open:
771 return finish_no_open(file, res); 564 return finish_no_open(file, res);
772 } 565 }
773 566
774 /* 567 /*
775 * Code shared between mknod, mkdir, symlink a 568 * Code shared between mknod, mkdir, symlink and link
776 */ 569 */
777 static int create_new_entry(struct fuse_mount !! 570 static int create_new_entry(struct fuse_conn *fc, struct fuse_args *args,
778 struct inode *dir, 571 struct inode *dir, struct dentry *entry,
779 umode_t mode) 572 umode_t mode)
780 { 573 {
781 struct fuse_entry_out outarg; 574 struct fuse_entry_out outarg;
782 struct inode *inode; 575 struct inode *inode;
783 struct dentry *d; 576 struct dentry *d;
784 int err; 577 int err;
785 struct fuse_forget_link *forget; 578 struct fuse_forget_link *forget;
786 579
787 if (fuse_is_bad(dir)) <<
788 return -EIO; <<
789 <<
790 forget = fuse_alloc_forget(); 580 forget = fuse_alloc_forget();
791 if (!forget) 581 if (!forget)
792 return -ENOMEM; 582 return -ENOMEM;
793 583
794 memset(&outarg, 0, sizeof(outarg)); 584 memset(&outarg, 0, sizeof(outarg));
795 args->nodeid = get_node_id(dir); 585 args->nodeid = get_node_id(dir);
796 args->out_numargs = 1; 586 args->out_numargs = 1;
797 args->out_args[0].size = sizeof(outarg 587 args->out_args[0].size = sizeof(outarg);
798 args->out_args[0].value = &outarg; 588 args->out_args[0].value = &outarg;
799 !! 589 err = fuse_simple_request(fc, args);
800 if (args->opcode != FUSE_LINK) { <<
801 err = get_create_ext(args, dir <<
802 if (err) <<
803 goto out_put_forget_re <<
804 } <<
805 <<
806 err = fuse_simple_request(fm, args); <<
807 free_ext_value(args); <<
808 if (err) 590 if (err)
809 goto out_put_forget_req; 591 goto out_put_forget_req;
810 592
811 err = -EIO; 593 err = -EIO;
812 if (invalid_nodeid(outarg.nodeid) || f 594 if (invalid_nodeid(outarg.nodeid) || fuse_invalid_attr(&outarg.attr))
813 goto out_put_forget_req; 595 goto out_put_forget_req;
814 596
815 if ((outarg.attr.mode ^ mode) & S_IFMT 597 if ((outarg.attr.mode ^ mode) & S_IFMT)
816 goto out_put_forget_req; 598 goto out_put_forget_req;
817 599
818 inode = fuse_iget(dir->i_sb, outarg.no 600 inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
819 &outarg.attr, ATTR_T !! 601 &outarg.attr, entry_attr_timeout(&outarg), 0);
820 if (!inode) { 602 if (!inode) {
821 fuse_queue_forget(fm->fc, forg !! 603 fuse_queue_forget(fc, forget, outarg.nodeid, 1);
822 return -ENOMEM; 604 return -ENOMEM;
823 } 605 }
824 kfree(forget); 606 kfree(forget);
825 607
826 d_drop(entry); 608 d_drop(entry);
827 d = d_splice_alias(inode, entry); 609 d = d_splice_alias(inode, entry);
828 if (IS_ERR(d)) 610 if (IS_ERR(d))
829 return PTR_ERR(d); 611 return PTR_ERR(d);
830 612
831 if (d) { 613 if (d) {
832 fuse_change_entry_timeout(d, & 614 fuse_change_entry_timeout(d, &outarg);
833 dput(d); 615 dput(d);
834 } else { 616 } else {
835 fuse_change_entry_timeout(entr 617 fuse_change_entry_timeout(entry, &outarg);
836 } 618 }
837 fuse_dir_changed(dir); 619 fuse_dir_changed(dir);
838 return 0; 620 return 0;
839 621
840 out_put_forget_req: 622 out_put_forget_req:
841 if (err == -EEXIST) <<
842 fuse_invalidate_entry(entry); <<
843 kfree(forget); 623 kfree(forget);
844 return err; 624 return err;
845 } 625 }
846 626
847 static int fuse_mknod(struct mnt_idmap *idmap, !! 627 static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
848 struct dentry *entry, um !! 628 dev_t rdev)
849 { 629 {
850 struct fuse_mknod_in inarg; 630 struct fuse_mknod_in inarg;
851 struct fuse_mount *fm = get_fuse_mount !! 631 struct fuse_conn *fc = get_fuse_conn(dir);
852 FUSE_ARGS(args); 632 FUSE_ARGS(args);
853 633
854 if (!fm->fc->dont_mask) !! 634 if (!fc->dont_mask)
855 mode &= ~current_umask(); 635 mode &= ~current_umask();
856 636
857 memset(&inarg, 0, sizeof(inarg)); 637 memset(&inarg, 0, sizeof(inarg));
858 inarg.mode = mode; 638 inarg.mode = mode;
859 inarg.rdev = new_encode_dev(rdev); 639 inarg.rdev = new_encode_dev(rdev);
860 inarg.umask = current_umask(); 640 inarg.umask = current_umask();
861 args.opcode = FUSE_MKNOD; 641 args.opcode = FUSE_MKNOD;
862 args.in_numargs = 2; 642 args.in_numargs = 2;
863 args.in_args[0].size = sizeof(inarg); 643 args.in_args[0].size = sizeof(inarg);
864 args.in_args[0].value = &inarg; 644 args.in_args[0].value = &inarg;
865 args.in_args[1].size = entry->d_name.l 645 args.in_args[1].size = entry->d_name.len + 1;
866 args.in_args[1].value = entry->d_name. 646 args.in_args[1].value = entry->d_name.name;
867 return create_new_entry(fm, &args, dir !! 647 return create_new_entry(fc, &args, dir, entry, mode);
868 } 648 }
869 649
870 static int fuse_create(struct mnt_idmap *idmap !! 650 static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
871 struct dentry *entry, u !! 651 bool excl)
872 { 652 {
873 return fuse_mknod(&nop_mnt_idmap, dir, !! 653 return fuse_mknod(dir, entry, mode, 0);
874 } 654 }
875 655
876 static int fuse_tmpfile(struct mnt_idmap *idma !! 656 static int fuse_mkdir(struct inode *dir, struct dentry *entry, umode_t mode)
877 struct file *file, umo <<
878 { <<
879 struct fuse_conn *fc = get_fuse_conn(d <<
880 int err; <<
881 <<
882 if (fc->no_tmpfile) <<
883 return -EOPNOTSUPP; <<
884 <<
885 err = fuse_create_open(dir, file->f_pa <<
886 if (err == -ENOSYS) { <<
887 fc->no_tmpfile = 1; <<
888 err = -EOPNOTSUPP; <<
889 } <<
890 return err; <<
891 } <<
892 <<
893 static int fuse_mkdir(struct mnt_idmap *idmap, <<
894 struct dentry *entry, um <<
895 { 657 {
896 struct fuse_mkdir_in inarg; 658 struct fuse_mkdir_in inarg;
897 struct fuse_mount *fm = get_fuse_mount !! 659 struct fuse_conn *fc = get_fuse_conn(dir);
898 FUSE_ARGS(args); 660 FUSE_ARGS(args);
899 661
900 if (!fm->fc->dont_mask) !! 662 if (!fc->dont_mask)
901 mode &= ~current_umask(); 663 mode &= ~current_umask();
902 664
903 memset(&inarg, 0, sizeof(inarg)); 665 memset(&inarg, 0, sizeof(inarg));
904 inarg.mode = mode; 666 inarg.mode = mode;
905 inarg.umask = current_umask(); 667 inarg.umask = current_umask();
906 args.opcode = FUSE_MKDIR; 668 args.opcode = FUSE_MKDIR;
907 args.in_numargs = 2; 669 args.in_numargs = 2;
908 args.in_args[0].size = sizeof(inarg); 670 args.in_args[0].size = sizeof(inarg);
909 args.in_args[0].value = &inarg; 671 args.in_args[0].value = &inarg;
910 args.in_args[1].size = entry->d_name.l 672 args.in_args[1].size = entry->d_name.len + 1;
911 args.in_args[1].value = entry->d_name. 673 args.in_args[1].value = entry->d_name.name;
912 return create_new_entry(fm, &args, dir !! 674 return create_new_entry(fc, &args, dir, entry, S_IFDIR);
913 } 675 }
914 676
915 static int fuse_symlink(struct mnt_idmap *idma !! 677 static int fuse_symlink(struct inode *dir, struct dentry *entry,
916 struct dentry *entry, !! 678 const char *link)
917 { 679 {
918 struct fuse_mount *fm = get_fuse_mount !! 680 struct fuse_conn *fc = get_fuse_conn(dir);
919 unsigned len = strlen(link) + 1; 681 unsigned len = strlen(link) + 1;
920 FUSE_ARGS(args); 682 FUSE_ARGS(args);
921 683
922 args.opcode = FUSE_SYMLINK; 684 args.opcode = FUSE_SYMLINK;
923 args.in_numargs = 2; 685 args.in_numargs = 2;
924 args.in_args[0].size = entry->d_name.l 686 args.in_args[0].size = entry->d_name.len + 1;
925 args.in_args[0].value = entry->d_name. 687 args.in_args[0].value = entry->d_name.name;
926 args.in_args[1].size = len; 688 args.in_args[1].size = len;
927 args.in_args[1].value = link; 689 args.in_args[1].value = link;
928 return create_new_entry(fm, &args, dir !! 690 return create_new_entry(fc, &args, dir, entry, S_IFLNK);
929 } <<
930 <<
931 void fuse_flush_time_update(struct inode *inod <<
932 { <<
933 int err = sync_inode_metadata(inode, 1 <<
934 <<
935 mapping_set_error(inode->i_mapping, er <<
936 } 691 }
937 692
938 static void fuse_update_ctime_in_cache(struct !! 693 void fuse_update_ctime(struct inode *inode)
939 { 694 {
940 if (!IS_NOCMTIME(inode)) { 695 if (!IS_NOCMTIME(inode)) {
941 inode_set_ctime_current(inode) !! 696 inode->i_ctime = current_time(inode);
942 mark_inode_dirty_sync(inode); 697 mark_inode_dirty_sync(inode);
943 fuse_flush_time_update(inode); <<
944 } 698 }
945 } 699 }
946 700
947 void fuse_update_ctime(struct inode *inode) <<
948 { <<
949 fuse_invalidate_attr_mask(inode, STATX <<
950 fuse_update_ctime_in_cache(inode); <<
951 } <<
952 <<
953 static void fuse_entry_unlinked(struct dentry <<
954 { <<
955 struct inode *inode = d_inode(entry); <<
956 struct fuse_conn *fc = get_fuse_conn(i <<
957 struct fuse_inode *fi = get_fuse_inode <<
958 <<
959 spin_lock(&fi->lock); <<
960 fi->attr_version = atomic64_inc_return <<
961 /* <<
962 * If i_nlink == 0 then unlink doesn't <<
963 * happen if userspace filesystem is c <<
964 * difficult to enforce correct nlink <<
965 * condition here <<
966 */ <<
967 if (S_ISDIR(inode->i_mode)) <<
968 clear_nlink(inode); <<
969 else if (inode->i_nlink > 0) <<
970 drop_nlink(inode); <<
971 spin_unlock(&fi->lock); <<
972 fuse_invalidate_entry_cache(entry); <<
973 fuse_update_ctime(inode); <<
974 } <<
975 <<
976 static int fuse_unlink(struct inode *dir, stru 701 static int fuse_unlink(struct inode *dir, struct dentry *entry)
977 { 702 {
978 int err; 703 int err;
979 struct fuse_mount *fm = get_fuse_mount !! 704 struct fuse_conn *fc = get_fuse_conn(dir);
980 FUSE_ARGS(args); 705 FUSE_ARGS(args);
981 706
982 if (fuse_is_bad(dir)) <<
983 return -EIO; <<
984 <<
985 args.opcode = FUSE_UNLINK; 707 args.opcode = FUSE_UNLINK;
986 args.nodeid = get_node_id(dir); 708 args.nodeid = get_node_id(dir);
987 args.in_numargs = 1; 709 args.in_numargs = 1;
988 args.in_args[0].size = entry->d_name.l 710 args.in_args[0].size = entry->d_name.len + 1;
989 args.in_args[0].value = entry->d_name. 711 args.in_args[0].value = entry->d_name.name;
990 err = fuse_simple_request(fm, &args); !! 712 err = fuse_simple_request(fc, &args);
991 if (!err) { 713 if (!err) {
>> 714 struct inode *inode = d_inode(entry);
>> 715 struct fuse_inode *fi = get_fuse_inode(inode);
>> 716
>> 717 spin_lock(&fi->lock);
>> 718 fi->attr_version = atomic64_inc_return(&fc->attr_version);
>> 719 /*
>> 720 * If i_nlink == 0 then unlink doesn't make sense, yet this can
>> 721 * happen if userspace filesystem is careless. It would be
>> 722 * difficult to enforce correct nlink usage so just ignore this
>> 723 * condition here
>> 724 */
>> 725 if (inode->i_nlink > 0)
>> 726 drop_nlink(inode);
>> 727 spin_unlock(&fi->lock);
>> 728 fuse_invalidate_attr(inode);
992 fuse_dir_changed(dir); 729 fuse_dir_changed(dir);
993 fuse_entry_unlinked(entry); !! 730 fuse_invalidate_entry_cache(entry);
994 } else if (err == -EINTR || err == -EN !! 731 fuse_update_ctime(inode);
>> 732 } else if (err == -EINTR)
995 fuse_invalidate_entry(entry); 733 fuse_invalidate_entry(entry);
996 return err; 734 return err;
997 } 735 }
998 736
999 static int fuse_rmdir(struct inode *dir, struc 737 static int fuse_rmdir(struct inode *dir, struct dentry *entry)
1000 { 738 {
1001 int err; 739 int err;
1002 struct fuse_mount *fm = get_fuse_moun !! 740 struct fuse_conn *fc = get_fuse_conn(dir);
1003 FUSE_ARGS(args); 741 FUSE_ARGS(args);
1004 742
1005 if (fuse_is_bad(dir)) <<
1006 return -EIO; <<
1007 <<
1008 args.opcode = FUSE_RMDIR; 743 args.opcode = FUSE_RMDIR;
1009 args.nodeid = get_node_id(dir); 744 args.nodeid = get_node_id(dir);
1010 args.in_numargs = 1; 745 args.in_numargs = 1;
1011 args.in_args[0].size = entry->d_name. 746 args.in_args[0].size = entry->d_name.len + 1;
1012 args.in_args[0].value = entry->d_name 747 args.in_args[0].value = entry->d_name.name;
1013 err = fuse_simple_request(fm, &args); !! 748 err = fuse_simple_request(fc, &args);
1014 if (!err) { 749 if (!err) {
>> 750 clear_nlink(d_inode(entry));
1015 fuse_dir_changed(dir); 751 fuse_dir_changed(dir);
1016 fuse_entry_unlinked(entry); !! 752 fuse_invalidate_entry_cache(entry);
1017 } else if (err == -EINTR || err == -E !! 753 } else if (err == -EINTR)
1018 fuse_invalidate_entry(entry); 754 fuse_invalidate_entry(entry);
1019 return err; 755 return err;
1020 } 756 }
1021 757
1022 static int fuse_rename_common(struct inode *o 758 static int fuse_rename_common(struct inode *olddir, struct dentry *oldent,
1023 struct inode *n 759 struct inode *newdir, struct dentry *newent,
1024 unsigned int fl 760 unsigned int flags, int opcode, size_t argsize)
1025 { 761 {
1026 int err; 762 int err;
1027 struct fuse_rename2_in inarg; 763 struct fuse_rename2_in inarg;
1028 struct fuse_mount *fm = get_fuse_moun !! 764 struct fuse_conn *fc = get_fuse_conn(olddir);
1029 FUSE_ARGS(args); 765 FUSE_ARGS(args);
1030 766
1031 memset(&inarg, 0, argsize); 767 memset(&inarg, 0, argsize);
1032 inarg.newdir = get_node_id(newdir); 768 inarg.newdir = get_node_id(newdir);
1033 inarg.flags = flags; 769 inarg.flags = flags;
1034 args.opcode = opcode; 770 args.opcode = opcode;
1035 args.nodeid = get_node_id(olddir); 771 args.nodeid = get_node_id(olddir);
1036 args.in_numargs = 3; 772 args.in_numargs = 3;
1037 args.in_args[0].size = argsize; 773 args.in_args[0].size = argsize;
1038 args.in_args[0].value = &inarg; 774 args.in_args[0].value = &inarg;
1039 args.in_args[1].size = oldent->d_name 775 args.in_args[1].size = oldent->d_name.len + 1;
1040 args.in_args[1].value = oldent->d_nam 776 args.in_args[1].value = oldent->d_name.name;
1041 args.in_args[2].size = newent->d_name 777 args.in_args[2].size = newent->d_name.len + 1;
1042 args.in_args[2].value = newent->d_nam 778 args.in_args[2].value = newent->d_name.name;
1043 err = fuse_simple_request(fm, &args); !! 779 err = fuse_simple_request(fc, &args);
1044 if (!err) { 780 if (!err) {
1045 /* ctime changes */ 781 /* ctime changes */
>> 782 fuse_invalidate_attr(d_inode(oldent));
1046 fuse_update_ctime(d_inode(old 783 fuse_update_ctime(d_inode(oldent));
1047 784
1048 if (flags & RENAME_EXCHANGE) !! 785 if (flags & RENAME_EXCHANGE) {
>> 786 fuse_invalidate_attr(d_inode(newent));
1049 fuse_update_ctime(d_i 787 fuse_update_ctime(d_inode(newent));
>> 788 }
1050 789
1051 fuse_dir_changed(olddir); 790 fuse_dir_changed(olddir);
1052 if (olddir != newdir) 791 if (olddir != newdir)
1053 fuse_dir_changed(newd 792 fuse_dir_changed(newdir);
1054 793
1055 /* newent will end up negativ 794 /* newent will end up negative */
1056 if (!(flags & RENAME_EXCHANGE !! 795 if (!(flags & RENAME_EXCHANGE) && d_really_is_positive(newent)) {
1057 fuse_entry_unlinked(n !! 796 fuse_invalidate_attr(d_inode(newent));
1058 } else if (err == -EINTR || err == -E !! 797 fuse_invalidate_entry_cache(newent);
>> 798 fuse_update_ctime(d_inode(newent));
>> 799 }
>> 800 } else if (err == -EINTR) {
1059 /* If request was interrupted 801 /* If request was interrupted, DEITY only knows if the
1060 rename actually took place 802 rename actually took place. If the invalidation
1061 fails (e.g. some process h 803 fails (e.g. some process has CWD under the renamed
1062 directory), then there can 804 directory), then there can be inconsistency between
1063 the dcache and the real fi 805 the dcache and the real filesystem. Tough luck. */
1064 fuse_invalidate_entry(oldent) 806 fuse_invalidate_entry(oldent);
1065 if (d_really_is_positive(newe 807 if (d_really_is_positive(newent))
1066 fuse_invalidate_entry 808 fuse_invalidate_entry(newent);
1067 } 809 }
1068 810
1069 return err; 811 return err;
1070 } 812 }
1071 813
1072 static int fuse_rename2(struct mnt_idmap *idm !! 814 static int fuse_rename2(struct inode *olddir, struct dentry *oldent,
1073 struct dentry *oldent !! 815 struct inode *newdir, struct dentry *newent,
1074 struct dentry *newent !! 816 unsigned int flags)
1075 { 817 {
1076 struct fuse_conn *fc = get_fuse_conn( 818 struct fuse_conn *fc = get_fuse_conn(olddir);
1077 int err; 819 int err;
1078 820
1079 if (fuse_is_bad(olddir)) <<
1080 return -EIO; <<
1081 <<
1082 if (flags & ~(RENAME_NOREPLACE | RENA 821 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1083 return -EINVAL; 822 return -EINVAL;
1084 823
1085 if (flags) { 824 if (flags) {
1086 if (fc->no_rename2 || fc->min 825 if (fc->no_rename2 || fc->minor < 23)
1087 return -EINVAL; 826 return -EINVAL;
1088 827
1089 err = fuse_rename_common(oldd 828 err = fuse_rename_common(olddir, oldent, newdir, newent, flags,
1090 FUSE 829 FUSE_RENAME2,
1091 size 830 sizeof(struct fuse_rename2_in));
1092 if (err == -ENOSYS) { 831 if (err == -ENOSYS) {
1093 fc->no_rename2 = 1; 832 fc->no_rename2 = 1;
1094 err = -EINVAL; 833 err = -EINVAL;
1095 } 834 }
1096 } else { 835 } else {
1097 err = fuse_rename_common(oldd 836 err = fuse_rename_common(olddir, oldent, newdir, newent, 0,
1098 FUSE 837 FUSE_RENAME,
1099 size 838 sizeof(struct fuse_rename_in));
1100 } 839 }
1101 840
1102 return err; 841 return err;
1103 } 842 }
1104 843
1105 static int fuse_link(struct dentry *entry, st 844 static int fuse_link(struct dentry *entry, struct inode *newdir,
1106 struct dentry *newent) 845 struct dentry *newent)
1107 { 846 {
1108 int err; 847 int err;
1109 struct fuse_link_in inarg; 848 struct fuse_link_in inarg;
1110 struct inode *inode = d_inode(entry); 849 struct inode *inode = d_inode(entry);
1111 struct fuse_mount *fm = get_fuse_moun !! 850 struct fuse_conn *fc = get_fuse_conn(inode);
1112 FUSE_ARGS(args); 851 FUSE_ARGS(args);
1113 852
1114 memset(&inarg, 0, sizeof(inarg)); 853 memset(&inarg, 0, sizeof(inarg));
1115 inarg.oldnodeid = get_node_id(inode); 854 inarg.oldnodeid = get_node_id(inode);
1116 args.opcode = FUSE_LINK; 855 args.opcode = FUSE_LINK;
1117 args.in_numargs = 2; 856 args.in_numargs = 2;
1118 args.in_args[0].size = sizeof(inarg); 857 args.in_args[0].size = sizeof(inarg);
1119 args.in_args[0].value = &inarg; 858 args.in_args[0].value = &inarg;
1120 args.in_args[1].size = newent->d_name 859 args.in_args[1].size = newent->d_name.len + 1;
1121 args.in_args[1].value = newent->d_nam 860 args.in_args[1].value = newent->d_name.name;
1122 err = create_new_entry(fm, &args, new !! 861 err = create_new_entry(fc, &args, newdir, newent, inode->i_mode);
1123 if (!err) !! 862 /* Contrary to "normal" filesystems it can happen that link
1124 fuse_update_ctime_in_cache(in !! 863 makes two "logical" inodes point to the same "physical"
1125 else if (err == -EINTR) !! 864 inode. We invalidate the attributes of the old one, so it
1126 fuse_invalidate_attr(inode); !! 865 will reflect changes in the backing inode (link count,
>> 866 etc.)
>> 867 */
>> 868 if (!err) {
>> 869 struct fuse_inode *fi = get_fuse_inode(inode);
1127 870
>> 871 spin_lock(&fi->lock);
>> 872 fi->attr_version = atomic64_inc_return(&fc->attr_version);
>> 873 if (likely(inode->i_nlink < UINT_MAX))
>> 874 inc_nlink(inode);
>> 875 spin_unlock(&fi->lock);
>> 876 fuse_invalidate_attr(inode);
>> 877 fuse_update_ctime(inode);
>> 878 } else if (err == -EINTR) {
>> 879 fuse_invalidate_attr(inode);
>> 880 }
1128 return err; 881 return err;
1129 } 882 }
1130 883
1131 static void fuse_fillattr(struct inode *inode 884 static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
1132 struct kstat *stat) 885 struct kstat *stat)
1133 { 886 {
1134 unsigned int blkbits; 887 unsigned int blkbits;
1135 struct fuse_conn *fc = get_fuse_conn( 888 struct fuse_conn *fc = get_fuse_conn(inode);
1136 889
>> 890 /* see the comment in fuse_change_attributes() */
>> 891 if (fc->writeback_cache && S_ISREG(inode->i_mode)) {
>> 892 attr->size = i_size_read(inode);
>> 893 attr->mtime = inode->i_mtime.tv_sec;
>> 894 attr->mtimensec = inode->i_mtime.tv_nsec;
>> 895 attr->ctime = inode->i_ctime.tv_sec;
>> 896 attr->ctimensec = inode->i_ctime.tv_nsec;
>> 897 }
>> 898
1137 stat->dev = inode->i_sb->s_dev; 899 stat->dev = inode->i_sb->s_dev;
1138 stat->ino = attr->ino; 900 stat->ino = attr->ino;
1139 stat->mode = (inode->i_mode & S_IFMT) 901 stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
1140 stat->nlink = attr->nlink; 902 stat->nlink = attr->nlink;
1141 stat->uid = make_kuid(fc->user_ns, at 903 stat->uid = make_kuid(fc->user_ns, attr->uid);
1142 stat->gid = make_kgid(fc->user_ns, at 904 stat->gid = make_kgid(fc->user_ns, attr->gid);
1143 stat->rdev = inode->i_rdev; 905 stat->rdev = inode->i_rdev;
1144 stat->atime.tv_sec = attr->atime; 906 stat->atime.tv_sec = attr->atime;
1145 stat->atime.tv_nsec = attr->atimensec 907 stat->atime.tv_nsec = attr->atimensec;
1146 stat->mtime.tv_sec = attr->mtime; 908 stat->mtime.tv_sec = attr->mtime;
1147 stat->mtime.tv_nsec = attr->mtimensec 909 stat->mtime.tv_nsec = attr->mtimensec;
1148 stat->ctime.tv_sec = attr->ctime; 910 stat->ctime.tv_sec = attr->ctime;
1149 stat->ctime.tv_nsec = attr->ctimensec 911 stat->ctime.tv_nsec = attr->ctimensec;
1150 stat->size = attr->size; 912 stat->size = attr->size;
1151 stat->blocks = attr->blocks; 913 stat->blocks = attr->blocks;
1152 914
1153 if (attr->blksize != 0) 915 if (attr->blksize != 0)
1154 blkbits = ilog2(attr->blksize 916 blkbits = ilog2(attr->blksize);
1155 else 917 else
1156 blkbits = inode->i_sb->s_bloc 918 blkbits = inode->i_sb->s_blocksize_bits;
1157 919
1158 stat->blksize = 1 << blkbits; 920 stat->blksize = 1 << blkbits;
1159 } 921 }
1160 922
1161 static void fuse_statx_to_attr(struct fuse_st <<
1162 { <<
1163 memset(attr, 0, sizeof(*attr)); <<
1164 attr->ino = sx->ino; <<
1165 attr->size = sx->size; <<
1166 attr->blocks = sx->blocks; <<
1167 attr->atime = sx->atime.tv_sec; <<
1168 attr->mtime = sx->mtime.tv_sec; <<
1169 attr->ctime = sx->ctime.tv_sec; <<
1170 attr->atimensec = sx->atime.tv_nsec; <<
1171 attr->mtimensec = sx->mtime.tv_nsec; <<
1172 attr->ctimensec = sx->ctime.tv_nsec; <<
1173 attr->mode = sx->mode; <<
1174 attr->nlink = sx->nlink; <<
1175 attr->uid = sx->uid; <<
1176 attr->gid = sx->gid; <<
1177 attr->rdev = new_encode_dev(MKDEV(sx- <<
1178 attr->blksize = sx->blksize; <<
1179 } <<
1180 <<
1181 static int fuse_do_statx(struct inode *inode, <<
1182 struct kstat *stat) <<
1183 { <<
1184 int err; <<
1185 struct fuse_attr attr; <<
1186 struct fuse_statx *sx; <<
1187 struct fuse_statx_in inarg; <<
1188 struct fuse_statx_out outarg; <<
1189 struct fuse_mount *fm = get_fuse_moun <<
1190 u64 attr_version = fuse_get_attr_vers <<
1191 FUSE_ARGS(args); <<
1192 <<
1193 memset(&inarg, 0, sizeof(inarg)); <<
1194 memset(&outarg, 0, sizeof(outarg)); <<
1195 /* Directories have separate file-han <<
1196 if (file && S_ISREG(inode->i_mode)) { <<
1197 struct fuse_file *ff = file-> <<
1198 <<
1199 inarg.getattr_flags |= FUSE_G <<
1200 inarg.fh = ff->fh; <<
1201 } <<
1202 /* For now leave sync hints as the de <<
1203 inarg.sx_flags = 0; <<
1204 inarg.sx_mask = STATX_BASIC_STATS | S <<
1205 args.opcode = FUSE_STATX; <<
1206 args.nodeid = get_node_id(inode); <<
1207 args.in_numargs = 1; <<
1208 args.in_args[0].size = sizeof(inarg); <<
1209 args.in_args[0].value = &inarg; <<
1210 args.out_numargs = 1; <<
1211 args.out_args[0].size = sizeof(outarg <<
1212 args.out_args[0].value = &outarg; <<
1213 err = fuse_simple_request(fm, &args); <<
1214 if (err) <<
1215 return err; <<
1216 <<
1217 sx = &outarg.stat; <<
1218 if (((sx->mask & STATX_SIZE) && !fuse <<
1219 ((sx->mask & STATX_TYPE) && (!fus <<
1220 inod <<
1221 fuse_make_bad(inode); <<
1222 return -EIO; <<
1223 } <<
1224 <<
1225 fuse_statx_to_attr(&outarg.stat, &att <<
1226 if ((sx->mask & STATX_BASIC_STATS) == <<
1227 fuse_change_attributes(inode, <<
1228 ATTR_T <<
1229 } <<
1230 <<
1231 if (stat) { <<
1232 stat->result_mask = sx->mask <<
1233 stat->btime.tv_sec = sx->btim <<
1234 stat->btime.tv_nsec = min_t(u <<
1235 fuse_fillattr(inode, &attr, s <<
1236 stat->result_mask |= STATX_TY <<
1237 } <<
1238 <<
1239 return 0; <<
1240 } <<
1241 <<
1242 static int fuse_do_getattr(struct inode *inod 923 static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
1243 struct file *file) 924 struct file *file)
1244 { 925 {
1245 int err; 926 int err;
1246 struct fuse_getattr_in inarg; 927 struct fuse_getattr_in inarg;
1247 struct fuse_attr_out outarg; 928 struct fuse_attr_out outarg;
1248 struct fuse_mount *fm = get_fuse_moun !! 929 struct fuse_conn *fc = get_fuse_conn(inode);
1249 FUSE_ARGS(args); 930 FUSE_ARGS(args);
1250 u64 attr_version; 931 u64 attr_version;
1251 932
1252 attr_version = fuse_get_attr_version( !! 933 attr_version = fuse_get_attr_version(fc);
1253 934
1254 memset(&inarg, 0, sizeof(inarg)); 935 memset(&inarg, 0, sizeof(inarg));
1255 memset(&outarg, 0, sizeof(outarg)); 936 memset(&outarg, 0, sizeof(outarg));
1256 /* Directories have separate file-han 937 /* Directories have separate file-handle space */
1257 if (file && S_ISREG(inode->i_mode)) { 938 if (file && S_ISREG(inode->i_mode)) {
1258 struct fuse_file *ff = file-> 939 struct fuse_file *ff = file->private_data;
1259 940
1260 inarg.getattr_flags |= FUSE_G 941 inarg.getattr_flags |= FUSE_GETATTR_FH;
1261 inarg.fh = ff->fh; 942 inarg.fh = ff->fh;
1262 } 943 }
1263 args.opcode = FUSE_GETATTR; 944 args.opcode = FUSE_GETATTR;
1264 args.nodeid = get_node_id(inode); 945 args.nodeid = get_node_id(inode);
1265 args.in_numargs = 1; 946 args.in_numargs = 1;
1266 args.in_args[0].size = sizeof(inarg); 947 args.in_args[0].size = sizeof(inarg);
1267 args.in_args[0].value = &inarg; 948 args.in_args[0].value = &inarg;
1268 args.out_numargs = 1; 949 args.out_numargs = 1;
1269 args.out_args[0].size = sizeof(outarg 950 args.out_args[0].size = sizeof(outarg);
1270 args.out_args[0].value = &outarg; 951 args.out_args[0].value = &outarg;
1271 err = fuse_simple_request(fm, &args); !! 952 err = fuse_simple_request(fc, &args);
1272 if (!err) { 953 if (!err) {
1273 if (fuse_invalid_attr(&outarg 954 if (fuse_invalid_attr(&outarg.attr) ||
1274 inode_wrong_type(inode, o !! 955 (inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
1275 fuse_make_bad(inode); !! 956 make_bad_inode(inode);
1276 err = -EIO; 957 err = -EIO;
1277 } else { 958 } else {
1278 fuse_change_attribute !! 959 fuse_change_attributes(inode, &outarg.attr,
1279 !! 960 attr_timeout(&outarg),
1280 961 attr_version);
1281 if (stat) 962 if (stat)
1282 fuse_fillattr 963 fuse_fillattr(inode, &outarg.attr, stat);
1283 } 964 }
1284 } 965 }
1285 return err; 966 return err;
1286 } 967 }
1287 968
1288 static int fuse_update_get_attr(struct inode 969 static int fuse_update_get_attr(struct inode *inode, struct file *file,
1289 struct kstat 970 struct kstat *stat, u32 request_mask,
1290 unsigned int 971 unsigned int flags)
1291 { 972 {
1292 struct fuse_inode *fi = get_fuse_inod 973 struct fuse_inode *fi = get_fuse_inode(inode);
1293 struct fuse_conn *fc = get_fuse_conn( <<
1294 int err = 0; 974 int err = 0;
1295 bool sync; 975 bool sync;
1296 u32 inval_mask = READ_ONCE(fi->inval_ <<
1297 u32 cache_mask = fuse_get_cache_mask( <<
1298 <<
1299 <<
1300 /* FUSE only supports basic stats and <<
1301 request_mask &= STATX_BASIC_STATS | S <<
1302 retry: <<
1303 if (fc->no_statx) <<
1304 request_mask &= STATX_BASIC_S <<
1305 976
1306 if (!request_mask) !! 977 if (flags & AT_STATX_FORCE_SYNC)
1307 sync = false; <<
1308 else if (flags & AT_STATX_FORCE_SYNC) <<
1309 sync = true; 978 sync = true;
1310 else if (flags & AT_STATX_DONT_SYNC) 979 else if (flags & AT_STATX_DONT_SYNC)
1311 sync = false; 980 sync = false;
1312 else if (request_mask & inval_mask & !! 981 else if (request_mask & READ_ONCE(fi->inval_mask))
1313 sync = true; 982 sync = true;
1314 else 983 else
1315 sync = time_before64(fi->i_ti 984 sync = time_before64(fi->i_time, get_jiffies_64());
1316 985
1317 if (sync) { 986 if (sync) {
1318 forget_all_cached_acls(inode) 987 forget_all_cached_acls(inode);
1319 /* Try statx if BTIME is requ !! 988 err = fuse_do_getattr(inode, stat, file);
1320 if (!fc->no_statx && (request <<
1321 err = fuse_do_statx(i <<
1322 if (err == -ENOSYS) { <<
1323 fc->no_statx <<
1324 err = 0; <<
1325 goto retry; <<
1326 } <<
1327 } else { <<
1328 err = fuse_do_getattr <<
1329 } <<
1330 } else if (stat) { 989 } else if (stat) {
1331 generic_fillattr(&nop_mnt_idm !! 990 generic_fillattr(inode, stat);
1332 stat->mode = fi->orig_i_mode; 991 stat->mode = fi->orig_i_mode;
1333 stat->ino = fi->orig_ino; 992 stat->ino = fi->orig_ino;
1334 if (test_bit(FUSE_I_BTIME, &f <<
1335 stat->btime = fi->i_b <<
1336 stat->result_mask |= <<
1337 } <<
1338 } 993 }
1339 994
1340 return err; 995 return err;
1341 } 996 }
1342 997
1343 int fuse_update_attributes(struct inode *inod !! 998 int fuse_update_attributes(struct inode *inode, struct file *file)
1344 { 999 {
1345 return fuse_update_get_attr(inode, fi !! 1000 /* Do *not* need to get atime for internal purposes */
>> 1001 return fuse_update_get_attr(inode, file, NULL,
>> 1002 STATX_BASIC_STATS & ~STATX_ATIME, 0);
1346 } 1003 }
1347 1004
1348 int fuse_reverse_inval_entry(struct fuse_conn !! 1005 int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
1349 u64 child_nodeid !! 1006 u64 child_nodeid, struct qstr *name)
1350 { 1007 {
1351 int err = -ENOTDIR; 1008 int err = -ENOTDIR;
1352 struct inode *parent; 1009 struct inode *parent;
1353 struct dentry *dir; 1010 struct dentry *dir;
1354 struct dentry *entry; 1011 struct dentry *entry;
1355 1012
1356 parent = fuse_ilookup(fc, parent_node !! 1013 parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid);
1357 if (!parent) 1014 if (!parent)
1358 return -ENOENT; 1015 return -ENOENT;
1359 1016
1360 inode_lock_nested(parent, I_MUTEX_PAR !! 1017 inode_lock(parent);
1361 if (!S_ISDIR(parent->i_mode)) 1018 if (!S_ISDIR(parent->i_mode))
1362 goto unlock; 1019 goto unlock;
1363 1020
1364 err = -ENOENT; 1021 err = -ENOENT;
1365 dir = d_find_alias(parent); 1022 dir = d_find_alias(parent);
1366 if (!dir) 1023 if (!dir)
1367 goto unlock; 1024 goto unlock;
1368 1025
1369 name->hash = full_name_hash(dir, name 1026 name->hash = full_name_hash(dir, name->name, name->len);
1370 entry = d_lookup(dir, name); 1027 entry = d_lookup(dir, name);
1371 dput(dir); 1028 dput(dir);
1372 if (!entry) 1029 if (!entry)
1373 goto unlock; 1030 goto unlock;
1374 1031
1375 fuse_dir_changed(parent); 1032 fuse_dir_changed(parent);
1376 if (!(flags & FUSE_EXPIRE_ONLY)) !! 1033 fuse_invalidate_entry(entry);
1377 d_invalidate(entry); <<
1378 fuse_invalidate_entry_cache(entry); <<
1379 1034
1380 if (child_nodeid != 0 && d_really_is_ 1035 if (child_nodeid != 0 && d_really_is_positive(entry)) {
1381 inode_lock(d_inode(entry)); 1036 inode_lock(d_inode(entry));
1382 if (get_node_id(d_inode(entry 1037 if (get_node_id(d_inode(entry)) != child_nodeid) {
1383 err = -ENOENT; 1038 err = -ENOENT;
1384 goto badentry; 1039 goto badentry;
1385 } 1040 }
1386 if (d_mountpoint(entry)) { 1041 if (d_mountpoint(entry)) {
1387 err = -EBUSY; 1042 err = -EBUSY;
1388 goto badentry; 1043 goto badentry;
1389 } 1044 }
1390 if (d_is_dir(entry)) { 1045 if (d_is_dir(entry)) {
1391 shrink_dcache_parent( 1046 shrink_dcache_parent(entry);
1392 if (!simple_empty(ent 1047 if (!simple_empty(entry)) {
1393 err = -ENOTEM 1048 err = -ENOTEMPTY;
1394 goto badentry 1049 goto badentry;
1395 } 1050 }
1396 d_inode(entry)->i_fla 1051 d_inode(entry)->i_flags |= S_DEAD;
1397 } 1052 }
1398 dont_mount(entry); 1053 dont_mount(entry);
1399 clear_nlink(d_inode(entry)); 1054 clear_nlink(d_inode(entry));
1400 err = 0; 1055 err = 0;
1401 badentry: 1056 badentry:
1402 inode_unlock(d_inode(entry)); 1057 inode_unlock(d_inode(entry));
1403 if (!err) 1058 if (!err)
1404 d_delete(entry); 1059 d_delete(entry);
1405 } else { 1060 } else {
1406 err = 0; 1061 err = 0;
1407 } 1062 }
1408 dput(entry); 1063 dput(entry);
1409 1064
1410 unlock: 1065 unlock:
1411 inode_unlock(parent); 1066 inode_unlock(parent);
1412 iput(parent); 1067 iput(parent);
1413 return err; 1068 return err;
1414 } 1069 }
1415 1070
1416 static inline bool fuse_permissible_uidgid(st <<
1417 { <<
1418 const struct cred *cred = current_cre <<
1419 <<
1420 return (uid_eq(cred->euid, fc->user_i <<
1421 uid_eq(cred->suid, fc->user_i <<
1422 uid_eq(cred->uid, fc->user_i <<
1423 gid_eq(cred->egid, fc->group_ <<
1424 gid_eq(cred->sgid, fc->group_ <<
1425 gid_eq(cred->gid, fc->group_ <<
1426 } <<
1427 <<
1428 /* 1071 /*
1429 * Calling into a user-controlled filesystem 1072 * Calling into a user-controlled filesystem gives the filesystem
1430 * daemon ptrace-like capabilities over the c 1073 * daemon ptrace-like capabilities over the current process. This
1431 * means, that the filesystem daemon is able 1074 * means, that the filesystem daemon is able to record the exact
1432 * filesystem operations performed, and can a 1075 * filesystem operations performed, and can also control the behavior
1433 * of the requester process in otherwise impo 1076 * of the requester process in otherwise impossible ways. For example
1434 * it can delay the operation for arbitrary l 1077 * it can delay the operation for arbitrary length of time allowing
1435 * DoS against the requester. 1078 * DoS against the requester.
1436 * 1079 *
1437 * For this reason only those processes can c 1080 * For this reason only those processes can call into the filesystem,
1438 * for which the owner of the mount has ptrac 1081 * for which the owner of the mount has ptrace privilege. This
1439 * excludes processes started by other users, 1082 * excludes processes started by other users, suid or sgid processes.
1440 */ 1083 */
1441 bool fuse_allow_current_process(struct fuse_c !! 1084 int fuse_allow_current_process(struct fuse_conn *fc)
1442 { 1085 {
1443 bool allow; !! 1086 const struct cred *cred;
1444 1087
1445 if (fc->allow_other) 1088 if (fc->allow_other)
1446 allow = current_in_userns(fc- !! 1089 return current_in_userns(fc->user_ns);
1447 else <<
1448 allow = fuse_permissible_uidg <<
1449 1090
1450 if (!allow && allow_sys_admin_access !! 1091 cred = current_cred();
1451 allow = true; !! 1092 if (uid_eq(cred->euid, fc->user_id) &&
>> 1093 uid_eq(cred->suid, fc->user_id) &&
>> 1094 uid_eq(cred->uid, fc->user_id) &&
>> 1095 gid_eq(cred->egid, fc->group_id) &&
>> 1096 gid_eq(cred->sgid, fc->group_id) &&
>> 1097 gid_eq(cred->gid, fc->group_id))
>> 1098 return 1;
1452 1099
1453 return allow; !! 1100 return 0;
1454 } 1101 }
1455 1102
1456 static int fuse_access(struct inode *inode, i 1103 static int fuse_access(struct inode *inode, int mask)
1457 { 1104 {
1458 struct fuse_mount *fm = get_fuse_moun !! 1105 struct fuse_conn *fc = get_fuse_conn(inode);
1459 FUSE_ARGS(args); 1106 FUSE_ARGS(args);
1460 struct fuse_access_in inarg; 1107 struct fuse_access_in inarg;
1461 int err; 1108 int err;
1462 1109
1463 BUG_ON(mask & MAY_NOT_BLOCK); 1110 BUG_ON(mask & MAY_NOT_BLOCK);
1464 1111
1465 if (fm->fc->no_access) !! 1112 if (fc->no_access)
1466 return 0; 1113 return 0;
1467 1114
1468 memset(&inarg, 0, sizeof(inarg)); 1115 memset(&inarg, 0, sizeof(inarg));
1469 inarg.mask = mask & (MAY_READ | MAY_W 1116 inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
1470 args.opcode = FUSE_ACCESS; 1117 args.opcode = FUSE_ACCESS;
1471 args.nodeid = get_node_id(inode); 1118 args.nodeid = get_node_id(inode);
1472 args.in_numargs = 1; 1119 args.in_numargs = 1;
1473 args.in_args[0].size = sizeof(inarg); 1120 args.in_args[0].size = sizeof(inarg);
1474 args.in_args[0].value = &inarg; 1121 args.in_args[0].value = &inarg;
1475 err = fuse_simple_request(fm, &args); !! 1122 err = fuse_simple_request(fc, &args);
1476 if (err == -ENOSYS) { 1123 if (err == -ENOSYS) {
1477 fm->fc->no_access = 1; !! 1124 fc->no_access = 1;
1478 err = 0; 1125 err = 0;
1479 } 1126 }
1480 return err; 1127 return err;
1481 } 1128 }
1482 1129
1483 static int fuse_perm_getattr(struct inode *in 1130 static int fuse_perm_getattr(struct inode *inode, int mask)
1484 { 1131 {
1485 if (mask & MAY_NOT_BLOCK) 1132 if (mask & MAY_NOT_BLOCK)
1486 return -ECHILD; 1133 return -ECHILD;
1487 1134
1488 forget_all_cached_acls(inode); 1135 forget_all_cached_acls(inode);
1489 return fuse_do_getattr(inode, NULL, N 1136 return fuse_do_getattr(inode, NULL, NULL);
1490 } 1137 }
1491 1138
1492 /* 1139 /*
1493 * Check permission. The two basic access mo 1140 * Check permission. The two basic access models of FUSE are:
1494 * 1141 *
1495 * 1) Local access checking ('default_permiss 1142 * 1) Local access checking ('default_permissions' mount option) based
1496 * on file mode. This is the plain old disk 1143 * on file mode. This is the plain old disk filesystem permission
1497 * model. !! 1144 * modell.
1498 * 1145 *
1499 * 2) "Remote" access checking, where server 1146 * 2) "Remote" access checking, where server is responsible for
1500 * checking permission in each inode operatio 1147 * checking permission in each inode operation. An exception to this
1501 * is if ->permission() was invoked from sys_ 1148 * is if ->permission() was invoked from sys_access() in which case an
1502 * access request is sent. Execute permissio 1149 * access request is sent. Execute permission is still checked
1503 * locally based on file mode. 1150 * locally based on file mode.
1504 */ 1151 */
1505 static int fuse_permission(struct mnt_idmap * !! 1152 static int fuse_permission(struct inode *inode, int mask)
1506 struct inode *inod <<
1507 { 1153 {
1508 struct fuse_conn *fc = get_fuse_conn( 1154 struct fuse_conn *fc = get_fuse_conn(inode);
1509 bool refreshed = false; 1155 bool refreshed = false;
1510 int err = 0; 1156 int err = 0;
1511 1157
1512 if (fuse_is_bad(inode)) <<
1513 return -EIO; <<
1514 <<
1515 if (!fuse_allow_current_process(fc)) 1158 if (!fuse_allow_current_process(fc))
1516 return -EACCES; 1159 return -EACCES;
1517 1160
1518 /* 1161 /*
1519 * If attributes are needed, refresh 1162 * If attributes are needed, refresh them before proceeding
1520 */ 1163 */
1521 if (fc->default_permissions || 1164 if (fc->default_permissions ||
1522 ((mask & MAY_EXEC) && S_ISREG(ino 1165 ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
1523 struct fuse_inode *fi = get_f 1166 struct fuse_inode *fi = get_fuse_inode(inode);
1524 u32 perm_mask = STATX_MODE | 1167 u32 perm_mask = STATX_MODE | STATX_UID | STATX_GID;
1525 1168
1526 if (perm_mask & READ_ONCE(fi- 1169 if (perm_mask & READ_ONCE(fi->inval_mask) ||
1527 time_before64(fi->i_time, 1170 time_before64(fi->i_time, get_jiffies_64())) {
1528 refreshed = true; 1171 refreshed = true;
1529 1172
1530 err = fuse_perm_getat 1173 err = fuse_perm_getattr(inode, mask);
1531 if (err) 1174 if (err)
1532 return err; 1175 return err;
1533 } 1176 }
1534 } 1177 }
1535 1178
1536 if (fc->default_permissions) { 1179 if (fc->default_permissions) {
1537 err = generic_permission(&nop !! 1180 err = generic_permission(inode, mask);
1538 1181
1539 /* If permission is denied, t 1182 /* If permission is denied, try to refresh file
1540 attributes. This is also 1183 attributes. This is also needed, because the root
1541 node will at first have no 1184 node will at first have no permissions */
1542 if (err == -EACCES && !refres 1185 if (err == -EACCES && !refreshed) {
1543 err = fuse_perm_getat 1186 err = fuse_perm_getattr(inode, mask);
1544 if (!err) 1187 if (!err)
1545 err = generic !! 1188 err = generic_permission(inode, mask);
1546 <<
1547 } 1189 }
1548 1190
1549 /* Note: the opposite of the 1191 /* Note: the opposite of the above test does not
1550 exist. So if permissions 1192 exist. So if permissions are revoked this won't be
1551 noticed immediately, only 1193 noticed immediately, only after the attribute
1552 timeout has expired */ 1194 timeout has expired */
1553 } else if (mask & (MAY_ACCESS | MAY_C 1195 } else if (mask & (MAY_ACCESS | MAY_CHDIR)) {
1554 err = fuse_access(inode, mask 1196 err = fuse_access(inode, mask);
1555 } else if ((mask & MAY_EXEC) && S_ISR 1197 } else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
1556 if (!(inode->i_mode & S_IXUGO 1198 if (!(inode->i_mode & S_IXUGO)) {
1557 if (refreshed) 1199 if (refreshed)
1558 return -EACCE 1200 return -EACCES;
1559 1201
1560 err = fuse_perm_getat 1202 err = fuse_perm_getattr(inode, mask);
1561 if (!err && !(inode-> 1203 if (!err && !(inode->i_mode & S_IXUGO))
1562 return -EACCE 1204 return -EACCES;
1563 } 1205 }
1564 } 1206 }
1565 return err; 1207 return err;
1566 } 1208 }
1567 1209
1568 static int fuse_readlink_page(struct inode *i 1210 static int fuse_readlink_page(struct inode *inode, struct page *page)
1569 { 1211 {
1570 struct fuse_mount *fm = get_fuse_moun !! 1212 struct fuse_conn *fc = get_fuse_conn(inode);
1571 struct fuse_page_desc desc = { .lengt 1213 struct fuse_page_desc desc = { .length = PAGE_SIZE - 1 };
1572 struct fuse_args_pages ap = { 1214 struct fuse_args_pages ap = {
1573 .num_pages = 1, 1215 .num_pages = 1,
1574 .pages = &page, 1216 .pages = &page,
1575 .descs = &desc, 1217 .descs = &desc,
1576 }; 1218 };
1577 char *link; 1219 char *link;
1578 ssize_t res; 1220 ssize_t res;
1579 1221
1580 ap.args.opcode = FUSE_READLINK; 1222 ap.args.opcode = FUSE_READLINK;
1581 ap.args.nodeid = get_node_id(inode); 1223 ap.args.nodeid = get_node_id(inode);
1582 ap.args.out_pages = true; 1224 ap.args.out_pages = true;
1583 ap.args.out_argvar = true; 1225 ap.args.out_argvar = true;
1584 ap.args.page_zeroing = true; 1226 ap.args.page_zeroing = true;
1585 ap.args.out_numargs = 1; 1227 ap.args.out_numargs = 1;
1586 ap.args.out_args[0].size = desc.lengt 1228 ap.args.out_args[0].size = desc.length;
1587 res = fuse_simple_request(fm, &ap.arg !! 1229 res = fuse_simple_request(fc, &ap.args);
1588 1230
1589 fuse_invalidate_atime(inode); 1231 fuse_invalidate_atime(inode);
1590 1232
1591 if (res < 0) 1233 if (res < 0)
1592 return res; 1234 return res;
1593 1235
1594 if (WARN_ON(res >= PAGE_SIZE)) 1236 if (WARN_ON(res >= PAGE_SIZE))
1595 return -EIO; 1237 return -EIO;
1596 1238
1597 link = page_address(page); 1239 link = page_address(page);
1598 link[res] = '\0'; 1240 link[res] = '\0';
1599 1241
1600 return 0; 1242 return 0;
1601 } 1243 }
1602 1244
1603 static const char *fuse_get_link(struct dentr 1245 static const char *fuse_get_link(struct dentry *dentry, struct inode *inode,
1604 struct delay 1246 struct delayed_call *callback)
1605 { 1247 {
1606 struct fuse_conn *fc = get_fuse_conn( 1248 struct fuse_conn *fc = get_fuse_conn(inode);
1607 struct page *page; 1249 struct page *page;
1608 int err; 1250 int err;
1609 1251
1610 err = -EIO; 1252 err = -EIO;
1611 if (fuse_is_bad(inode)) !! 1253 if (is_bad_inode(inode))
1612 goto out_err; 1254 goto out_err;
1613 1255
1614 if (fc->cache_symlinks) 1256 if (fc->cache_symlinks)
1615 return page_get_link(dentry, 1257 return page_get_link(dentry, inode, callback);
1616 1258
1617 err = -ECHILD; 1259 err = -ECHILD;
1618 if (!dentry) 1260 if (!dentry)
1619 goto out_err; 1261 goto out_err;
1620 1262
1621 page = alloc_page(GFP_KERNEL); 1263 page = alloc_page(GFP_KERNEL);
1622 err = -ENOMEM; 1264 err = -ENOMEM;
1623 if (!page) 1265 if (!page)
1624 goto out_err; 1266 goto out_err;
1625 1267
1626 err = fuse_readlink_page(inode, page) 1268 err = fuse_readlink_page(inode, page);
1627 if (err) { 1269 if (err) {
1628 __free_page(page); 1270 __free_page(page);
1629 goto out_err; 1271 goto out_err;
1630 } 1272 }
1631 1273
1632 set_delayed_call(callback, page_put_l 1274 set_delayed_call(callback, page_put_link, page);
1633 1275
1634 return page_address(page); 1276 return page_address(page);
1635 1277
1636 out_err: 1278 out_err:
1637 return ERR_PTR(err); 1279 return ERR_PTR(err);
1638 } 1280 }
1639 1281
1640 static int fuse_dir_open(struct inode *inode, 1282 static int fuse_dir_open(struct inode *inode, struct file *file)
1641 { 1283 {
1642 struct fuse_mount *fm = get_fuse_moun !! 1284 return fuse_open_common(inode, file, true);
1643 int err; <<
1644 <<
1645 if (fuse_is_bad(inode)) <<
1646 return -EIO; <<
1647 <<
1648 err = generic_file_open(inode, file); <<
1649 if (err) <<
1650 return err; <<
1651 <<
1652 err = fuse_do_open(fm, get_node_id(in <<
1653 if (!err) { <<
1654 struct fuse_file *ff = file-> <<
1655 <<
1656 /* <<
1657 * Keep handling FOPEN_STREAM <<
1658 * directories for backward c <<
1659 * to be useful. <<
1660 */ <<
1661 if (ff->open_flags & (FOPEN_S <<
1662 nonseekable_open(inod <<
1663 } <<
1664 <<
1665 return err; <<
1666 } 1285 }
1667 1286
1668 static int fuse_dir_release(struct inode *ino 1287 static int fuse_dir_release(struct inode *inode, struct file *file)
1669 { 1288 {
1670 fuse_release_common(file, true); 1289 fuse_release_common(file, true);
1671 1290
1672 return 0; 1291 return 0;
1673 } 1292 }
1674 1293
1675 static int fuse_dir_fsync(struct file *file, 1294 static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end,
1676 int datasync) 1295 int datasync)
1677 { 1296 {
1678 struct inode *inode = file->f_mapping 1297 struct inode *inode = file->f_mapping->host;
1679 struct fuse_conn *fc = get_fuse_conn( 1298 struct fuse_conn *fc = get_fuse_conn(inode);
1680 int err; 1299 int err;
1681 1300
1682 if (fuse_is_bad(inode)) !! 1301 if (is_bad_inode(inode))
1683 return -EIO; 1302 return -EIO;
1684 1303
1685 if (fc->no_fsyncdir) 1304 if (fc->no_fsyncdir)
1686 return 0; 1305 return 0;
1687 1306
1688 inode_lock(inode); 1307 inode_lock(inode);
1689 err = fuse_fsync_common(file, start, 1308 err = fuse_fsync_common(file, start, end, datasync, FUSE_FSYNCDIR);
1690 if (err == -ENOSYS) { 1309 if (err == -ENOSYS) {
1691 fc->no_fsyncdir = 1; 1310 fc->no_fsyncdir = 1;
1692 err = 0; 1311 err = 0;
1693 } 1312 }
1694 inode_unlock(inode); 1313 inode_unlock(inode);
1695 1314
1696 return err; 1315 return err;
1697 } 1316 }
1698 1317
1699 static long fuse_dir_ioctl(struct file *file, 1318 static long fuse_dir_ioctl(struct file *file, unsigned int cmd,
1700 unsigned long arg 1319 unsigned long arg)
1701 { 1320 {
1702 struct fuse_conn *fc = get_fuse_conn( 1321 struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
1703 1322
1704 /* FUSE_IOCTL_DIR only supported for 1323 /* FUSE_IOCTL_DIR only supported for API version >= 7.18 */
1705 if (fc->minor < 18) 1324 if (fc->minor < 18)
1706 return -ENOTTY; 1325 return -ENOTTY;
1707 1326
1708 return fuse_ioctl_common(file, cmd, a 1327 return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_DIR);
1709 } 1328 }
1710 1329
1711 static long fuse_dir_compat_ioctl(struct file 1330 static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
1712 unsigned l 1331 unsigned long arg)
1713 { 1332 {
1714 struct fuse_conn *fc = get_fuse_conn( 1333 struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
1715 1334
1716 if (fc->minor < 18) 1335 if (fc->minor < 18)
1717 return -ENOTTY; 1336 return -ENOTTY;
1718 1337
1719 return fuse_ioctl_common(file, cmd, a 1338 return fuse_ioctl_common(file, cmd, arg,
1720 FUSE_IOCTL_C 1339 FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
1721 } 1340 }
1722 1341
1723 static bool update_mtime(unsigned ivalid, boo 1342 static bool update_mtime(unsigned ivalid, bool trust_local_mtime)
1724 { 1343 {
1725 /* Always update if mtime is explicit 1344 /* Always update if mtime is explicitly set */
1726 if (ivalid & ATTR_MTIME_SET) 1345 if (ivalid & ATTR_MTIME_SET)
1727 return true; 1346 return true;
1728 1347
1729 /* Or if kernel i_mtime is the offici 1348 /* Or if kernel i_mtime is the official one */
1730 if (trust_local_mtime) 1349 if (trust_local_mtime)
1731 return true; 1350 return true;
1732 1351
1733 /* If it's an open(O_TRUNC) or an ftr 1352 /* If it's an open(O_TRUNC) or an ftruncate(), don't update */
1734 if ((ivalid & ATTR_SIZE) && (ivalid & 1353 if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
1735 return false; 1354 return false;
1736 1355
1737 /* In all other cases update */ 1356 /* In all other cases update */
1738 return true; 1357 return true;
1739 } 1358 }
1740 1359
1741 static void iattr_to_fattr(struct fuse_conn * 1360 static void iattr_to_fattr(struct fuse_conn *fc, struct iattr *iattr,
1742 struct fuse_setatt 1361 struct fuse_setattr_in *arg, bool trust_local_cmtime)
1743 { 1362 {
1744 unsigned ivalid = iattr->ia_valid; 1363 unsigned ivalid = iattr->ia_valid;
1745 1364
1746 if (ivalid & ATTR_MODE) 1365 if (ivalid & ATTR_MODE)
1747 arg->valid |= FATTR_MODE, a 1366 arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
1748 if (ivalid & ATTR_UID) 1367 if (ivalid & ATTR_UID)
1749 arg->valid |= FATTR_UID, a 1368 arg->valid |= FATTR_UID, arg->uid = from_kuid(fc->user_ns, iattr->ia_uid);
1750 if (ivalid & ATTR_GID) 1369 if (ivalid & ATTR_GID)
1751 arg->valid |= FATTR_GID, a 1370 arg->valid |= FATTR_GID, arg->gid = from_kgid(fc->user_ns, iattr->ia_gid);
1752 if (ivalid & ATTR_SIZE) 1371 if (ivalid & ATTR_SIZE)
1753 arg->valid |= FATTR_SIZE, a 1372 arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
1754 if (ivalid & ATTR_ATIME) { 1373 if (ivalid & ATTR_ATIME) {
1755 arg->valid |= FATTR_ATIME; 1374 arg->valid |= FATTR_ATIME;
1756 arg->atime = iattr->ia_atime. 1375 arg->atime = iattr->ia_atime.tv_sec;
1757 arg->atimensec = iattr->ia_at 1376 arg->atimensec = iattr->ia_atime.tv_nsec;
1758 if (!(ivalid & ATTR_ATIME_SET 1377 if (!(ivalid & ATTR_ATIME_SET))
1759 arg->valid |= FATTR_A 1378 arg->valid |= FATTR_ATIME_NOW;
1760 } 1379 }
1761 if ((ivalid & ATTR_MTIME) && update_m 1380 if ((ivalid & ATTR_MTIME) && update_mtime(ivalid, trust_local_cmtime)) {
1762 arg->valid |= FATTR_MTIME; 1381 arg->valid |= FATTR_MTIME;
1763 arg->mtime = iattr->ia_mtime. 1382 arg->mtime = iattr->ia_mtime.tv_sec;
1764 arg->mtimensec = iattr->ia_mt 1383 arg->mtimensec = iattr->ia_mtime.tv_nsec;
1765 if (!(ivalid & ATTR_MTIME_SET 1384 if (!(ivalid & ATTR_MTIME_SET) && !trust_local_cmtime)
1766 arg->valid |= FATTR_M 1385 arg->valid |= FATTR_MTIME_NOW;
1767 } 1386 }
1768 if ((ivalid & ATTR_CTIME) && trust_lo 1387 if ((ivalid & ATTR_CTIME) && trust_local_cmtime) {
1769 arg->valid |= FATTR_CTIME; 1388 arg->valid |= FATTR_CTIME;
1770 arg->ctime = iattr->ia_ctime. 1389 arg->ctime = iattr->ia_ctime.tv_sec;
1771 arg->ctimensec = iattr->ia_ct 1390 arg->ctimensec = iattr->ia_ctime.tv_nsec;
1772 } 1391 }
1773 } 1392 }
1774 1393
1775 /* 1394 /*
1776 * Prevent concurrent writepages on inode 1395 * Prevent concurrent writepages on inode
1777 * 1396 *
1778 * This is done by adding a negative bias to 1397 * This is done by adding a negative bias to the inode write counter
1779 * and waiting for all pending writes to fini 1398 * and waiting for all pending writes to finish.
1780 */ 1399 */
1781 void fuse_set_nowrite(struct inode *inode) 1400 void fuse_set_nowrite(struct inode *inode)
1782 { 1401 {
1783 struct fuse_inode *fi = get_fuse_inod 1402 struct fuse_inode *fi = get_fuse_inode(inode);
1784 1403
1785 BUG_ON(!inode_is_locked(inode)); 1404 BUG_ON(!inode_is_locked(inode));
1786 1405
1787 spin_lock(&fi->lock); 1406 spin_lock(&fi->lock);
1788 BUG_ON(fi->writectr < 0); 1407 BUG_ON(fi->writectr < 0);
1789 fi->writectr += FUSE_NOWRITE; 1408 fi->writectr += FUSE_NOWRITE;
1790 spin_unlock(&fi->lock); 1409 spin_unlock(&fi->lock);
1791 wait_event(fi->page_waitq, fi->writec 1410 wait_event(fi->page_waitq, fi->writectr == FUSE_NOWRITE);
1792 } 1411 }
1793 1412
1794 /* 1413 /*
1795 * Allow writepages on inode 1414 * Allow writepages on inode
1796 * 1415 *
1797 * Remove the bias from the writecounter and 1416 * Remove the bias from the writecounter and send any queued
1798 * writepages. 1417 * writepages.
1799 */ 1418 */
1800 static void __fuse_release_nowrite(struct ino 1419 static void __fuse_release_nowrite(struct inode *inode)
1801 { 1420 {
1802 struct fuse_inode *fi = get_fuse_inod 1421 struct fuse_inode *fi = get_fuse_inode(inode);
1803 1422
1804 BUG_ON(fi->writectr != FUSE_NOWRITE); 1423 BUG_ON(fi->writectr != FUSE_NOWRITE);
1805 fi->writectr = 0; 1424 fi->writectr = 0;
1806 fuse_flush_writepages(inode); 1425 fuse_flush_writepages(inode);
1807 } 1426 }
1808 1427
1809 void fuse_release_nowrite(struct inode *inode 1428 void fuse_release_nowrite(struct inode *inode)
1810 { 1429 {
1811 struct fuse_inode *fi = get_fuse_inod 1430 struct fuse_inode *fi = get_fuse_inode(inode);
1812 1431
1813 spin_lock(&fi->lock); 1432 spin_lock(&fi->lock);
1814 __fuse_release_nowrite(inode); 1433 __fuse_release_nowrite(inode);
1815 spin_unlock(&fi->lock); 1434 spin_unlock(&fi->lock);
1816 } 1435 }
1817 1436
1818 static void fuse_setattr_fill(struct fuse_con 1437 static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_args *args,
1819 struct inode *i 1438 struct inode *inode,
1820 struct fuse_set 1439 struct fuse_setattr_in *inarg_p,
1821 struct fuse_att 1440 struct fuse_attr_out *outarg_p)
1822 { 1441 {
1823 args->opcode = FUSE_SETATTR; 1442 args->opcode = FUSE_SETATTR;
1824 args->nodeid = get_node_id(inode); 1443 args->nodeid = get_node_id(inode);
1825 args->in_numargs = 1; 1444 args->in_numargs = 1;
1826 args->in_args[0].size = sizeof(*inarg 1445 args->in_args[0].size = sizeof(*inarg_p);
1827 args->in_args[0].value = inarg_p; 1446 args->in_args[0].value = inarg_p;
1828 args->out_numargs = 1; 1447 args->out_numargs = 1;
1829 args->out_args[0].size = sizeof(*outa 1448 args->out_args[0].size = sizeof(*outarg_p);
1830 args->out_args[0].value = outarg_p; 1449 args->out_args[0].value = outarg_p;
1831 } 1450 }
1832 1451
1833 /* 1452 /*
1834 * Flush inode->i_mtime to the server 1453 * Flush inode->i_mtime to the server
1835 */ 1454 */
1836 int fuse_flush_times(struct inode *inode, str 1455 int fuse_flush_times(struct inode *inode, struct fuse_file *ff)
1837 { 1456 {
1838 struct fuse_mount *fm = get_fuse_moun !! 1457 struct fuse_conn *fc = get_fuse_conn(inode);
1839 FUSE_ARGS(args); 1458 FUSE_ARGS(args);
1840 struct fuse_setattr_in inarg; 1459 struct fuse_setattr_in inarg;
1841 struct fuse_attr_out outarg; 1460 struct fuse_attr_out outarg;
1842 1461
1843 memset(&inarg, 0, sizeof(inarg)); 1462 memset(&inarg, 0, sizeof(inarg));
1844 memset(&outarg, 0, sizeof(outarg)); 1463 memset(&outarg, 0, sizeof(outarg));
1845 1464
1846 inarg.valid = FATTR_MTIME; 1465 inarg.valid = FATTR_MTIME;
1847 inarg.mtime = inode_get_mtime_sec(ino !! 1466 inarg.mtime = inode->i_mtime.tv_sec;
1848 inarg.mtimensec = inode_get_mtime_nse !! 1467 inarg.mtimensec = inode->i_mtime.tv_nsec;
1849 if (fm->fc->minor >= 23) { !! 1468 if (fc->minor >= 23) {
1850 inarg.valid |= FATTR_CTIME; 1469 inarg.valid |= FATTR_CTIME;
1851 inarg.ctime = inode_get_ctime !! 1470 inarg.ctime = inode->i_ctime.tv_sec;
1852 inarg.ctimensec = inode_get_c !! 1471 inarg.ctimensec = inode->i_ctime.tv_nsec;
1853 } 1472 }
1854 if (ff) { 1473 if (ff) {
1855 inarg.valid |= FATTR_FH; 1474 inarg.valid |= FATTR_FH;
1856 inarg.fh = ff->fh; 1475 inarg.fh = ff->fh;
1857 } 1476 }
1858 fuse_setattr_fill(fm->fc, &args, inod !! 1477 fuse_setattr_fill(fc, &args, inode, &inarg, &outarg);
1859 1478
1860 return fuse_simple_request(fm, &args) !! 1479 return fuse_simple_request(fc, &args);
1861 } 1480 }
1862 1481
1863 /* 1482 /*
1864 * Set attributes, and at the same time refre 1483 * Set attributes, and at the same time refresh them.
1865 * 1484 *
1866 * Truncation is slightly complicated, becaus 1485 * Truncation is slightly complicated, because the 'truncate' request
1867 * may fail, in which case we don't want to t 1486 * may fail, in which case we don't want to touch the mapping.
1868 * vmtruncate() doesn't allow for this case, 1487 * vmtruncate() doesn't allow for this case, so do the rlimit checking
1869 * and the actual truncation by hand. 1488 * and the actual truncation by hand.
1870 */ 1489 */
1871 int fuse_do_setattr(struct dentry *dentry, st 1490 int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
1872 struct file *file) 1491 struct file *file)
1873 { 1492 {
1874 struct inode *inode = d_inode(dentry) 1493 struct inode *inode = d_inode(dentry);
1875 struct fuse_mount *fm = get_fuse_moun !! 1494 struct fuse_conn *fc = get_fuse_conn(inode);
1876 struct fuse_conn *fc = fm->fc; <<
1877 struct fuse_inode *fi = get_fuse_inod 1495 struct fuse_inode *fi = get_fuse_inode(inode);
1878 struct address_space *mapping = inode <<
1879 FUSE_ARGS(args); 1496 FUSE_ARGS(args);
1880 struct fuse_setattr_in inarg; 1497 struct fuse_setattr_in inarg;
1881 struct fuse_attr_out outarg; 1498 struct fuse_attr_out outarg;
1882 bool is_truncate = false; 1499 bool is_truncate = false;
1883 bool is_wb = fc->writeback_cache && S !! 1500 bool is_wb = fc->writeback_cache;
1884 loff_t oldsize; 1501 loff_t oldsize;
1885 int err; 1502 int err;
1886 bool trust_local_cmtime = is_wb; !! 1503 bool trust_local_cmtime = is_wb && S_ISREG(inode->i_mode);
1887 bool fault_blocked = false; <<
1888 1504
1889 if (!fc->default_permissions) 1505 if (!fc->default_permissions)
1890 attr->ia_valid |= ATTR_FORCE; 1506 attr->ia_valid |= ATTR_FORCE;
1891 1507
1892 err = setattr_prepare(&nop_mnt_idmap, !! 1508 err = setattr_prepare(dentry, attr);
1893 if (err) 1509 if (err)
1894 return err; 1510 return err;
1895 1511
1896 if (attr->ia_valid & ATTR_SIZE) { <<
1897 if (WARN_ON(!S_ISREG(inode->i <<
1898 return -EIO; <<
1899 is_truncate = true; <<
1900 } <<
1901 <<
1902 if (FUSE_IS_DAX(inode) && is_truncate <<
1903 filemap_invalidate_lock(mappi <<
1904 fault_blocked = true; <<
1905 err = fuse_dax_break_layouts( <<
1906 if (err) { <<
1907 filemap_invalidate_un <<
1908 return err; <<
1909 } <<
1910 } <<
1911 <<
1912 if (attr->ia_valid & ATTR_OPEN) { 1512 if (attr->ia_valid & ATTR_OPEN) {
1913 /* This is coming from open(. 1513 /* This is coming from open(..., ... | O_TRUNC); */
1914 WARN_ON(!(attr->ia_valid & AT 1514 WARN_ON(!(attr->ia_valid & ATTR_SIZE));
1915 WARN_ON(attr->ia_size != 0); 1515 WARN_ON(attr->ia_size != 0);
1916 if (fc->atomic_o_trunc) { 1516 if (fc->atomic_o_trunc) {
1917 /* 1517 /*
1918 * No need to send re 1518 * No need to send request to userspace, since actual
1919 * truncation has alr 1519 * truncation has already been done by OPEN. But still
1920 * need to truncate p 1520 * need to truncate page cache.
1921 */ 1521 */
1922 i_size_write(inode, 0 1522 i_size_write(inode, 0);
1923 truncate_pagecache(in 1523 truncate_pagecache(inode, 0);
1924 goto out; !! 1524 return 0;
1925 } 1525 }
1926 file = NULL; 1526 file = NULL;
1927 } 1527 }
1928 1528
>> 1529 if (attr->ia_valid & ATTR_SIZE) {
>> 1530 if (WARN_ON(!S_ISREG(inode->i_mode)))
>> 1531 return -EIO;
>> 1532 is_truncate = true;
>> 1533 }
>> 1534
1929 /* Flush dirty data/metadata before n 1535 /* Flush dirty data/metadata before non-truncate SETATTR */
1930 if (is_wb && !! 1536 if (is_wb && S_ISREG(inode->i_mode) &&
1931 attr->ia_valid & 1537 attr->ia_valid &
1932 (ATTR_MODE | ATTR_UID 1538 (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_MTIME_SET |
1933 ATTR_TIMES_SET)) { 1539 ATTR_TIMES_SET)) {
1934 err = write_inode_now(inode, 1540 err = write_inode_now(inode, true);
1935 if (err) 1541 if (err)
1936 return err; 1542 return err;
1937 1543
1938 fuse_set_nowrite(inode); 1544 fuse_set_nowrite(inode);
1939 fuse_release_nowrite(inode); 1545 fuse_release_nowrite(inode);
1940 } 1546 }
1941 1547
1942 if (is_truncate) { 1548 if (is_truncate) {
1943 fuse_set_nowrite(inode); 1549 fuse_set_nowrite(inode);
1944 set_bit(FUSE_I_SIZE_UNSTABLE, 1550 set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
1945 if (trust_local_cmtime && att 1551 if (trust_local_cmtime && attr->ia_size != inode->i_size)
1946 attr->ia_valid |= ATT 1552 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1947 } 1553 }
1948 1554
1949 memset(&inarg, 0, sizeof(inarg)); 1555 memset(&inarg, 0, sizeof(inarg));
1950 memset(&outarg, 0, sizeof(outarg)); 1556 memset(&outarg, 0, sizeof(outarg));
1951 iattr_to_fattr(fc, attr, &inarg, trus 1557 iattr_to_fattr(fc, attr, &inarg, trust_local_cmtime);
1952 if (file) { 1558 if (file) {
1953 struct fuse_file *ff = file-> 1559 struct fuse_file *ff = file->private_data;
1954 inarg.valid |= FATTR_FH; 1560 inarg.valid |= FATTR_FH;
1955 inarg.fh = ff->fh; 1561 inarg.fh = ff->fh;
1956 } 1562 }
1957 <<
1958 /* Kill suid/sgid for non-directory c <<
1959 if (fc->handle_killpriv_v2 && !S_ISDI <<
1960 attr->ia_valid & (ATTR_UID | ATTR <<
1961 inarg.valid |= FATTR_KILL_SUI <<
1962 <<
1963 if (attr->ia_valid & ATTR_SIZE) { 1563 if (attr->ia_valid & ATTR_SIZE) {
1964 /* For mandatory locking in t 1564 /* For mandatory locking in truncate */
1965 inarg.valid |= FATTR_LOCKOWNE 1565 inarg.valid |= FATTR_LOCKOWNER;
1966 inarg.lock_owner = fuse_lock_ 1566 inarg.lock_owner = fuse_lock_owner_id(fc, current->files);
1967 <<
1968 /* Kill suid/sgid for truncat <<
1969 if (fc->handle_killpriv_v2 && <<
1970 inarg.valid |= FATTR_ <<
1971 } 1567 }
1972 fuse_setattr_fill(fc, &args, inode, & 1568 fuse_setattr_fill(fc, &args, inode, &inarg, &outarg);
1973 err = fuse_simple_request(fm, &args); !! 1569 err = fuse_simple_request(fc, &args);
1974 if (err) { 1570 if (err) {
1975 if (err == -EINTR) 1571 if (err == -EINTR)
1976 fuse_invalidate_attr( 1572 fuse_invalidate_attr(inode);
1977 goto error; 1573 goto error;
1978 } 1574 }
1979 1575
1980 if (fuse_invalid_attr(&outarg.attr) | 1576 if (fuse_invalid_attr(&outarg.attr) ||
1981 inode_wrong_type(inode, outarg.at !! 1577 (inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
1982 fuse_make_bad(inode); !! 1578 make_bad_inode(inode);
1983 err = -EIO; 1579 err = -EIO;
1984 goto error; 1580 goto error;
1985 } 1581 }
1986 1582
1987 spin_lock(&fi->lock); 1583 spin_lock(&fi->lock);
1988 /* the kernel maintains i_mtime local 1584 /* the kernel maintains i_mtime locally */
1989 if (trust_local_cmtime) { 1585 if (trust_local_cmtime) {
1990 if (attr->ia_valid & ATTR_MTI 1586 if (attr->ia_valid & ATTR_MTIME)
1991 inode_set_mtime_to_ts !! 1587 inode->i_mtime = attr->ia_mtime;
1992 if (attr->ia_valid & ATTR_CTI 1588 if (attr->ia_valid & ATTR_CTIME)
1993 inode_set_ctime_to_ts !! 1589 inode->i_ctime = attr->ia_ctime;
1994 /* FIXME: clear I_DIRTY_SYNC? 1590 /* FIXME: clear I_DIRTY_SYNC? */
1995 } 1591 }
1996 1592
1997 fuse_change_attributes_common(inode, !! 1593 fuse_change_attributes_common(inode, &outarg.attr,
1998 ATTR_TI !! 1594 attr_timeout(&outarg));
1999 fuse_ge <<
2000 oldsize = inode->i_size; 1595 oldsize = inode->i_size;
2001 /* see the comment in fuse_change_att 1596 /* see the comment in fuse_change_attributes() */
2002 if (!is_wb || is_truncate) !! 1597 if (!is_wb || is_truncate || !S_ISREG(inode->i_mode))
2003 i_size_write(inode, outarg.at 1598 i_size_write(inode, outarg.attr.size);
2004 1599
2005 if (is_truncate) { 1600 if (is_truncate) {
2006 /* NOTE: this may release/rea 1601 /* NOTE: this may release/reacquire fi->lock */
2007 __fuse_release_nowrite(inode) 1602 __fuse_release_nowrite(inode);
2008 } 1603 }
2009 spin_unlock(&fi->lock); 1604 spin_unlock(&fi->lock);
2010 1605
2011 /* 1606 /*
2012 * Only call invalidate_inode_pages2( 1607 * Only call invalidate_inode_pages2() after removing
2013 * FUSE_NOWRITE, otherwise fuse_laund !! 1608 * FUSE_NOWRITE, otherwise fuse_launder_page() would deadlock.
2014 */ 1609 */
2015 if ((is_truncate || !is_wb) && 1610 if ((is_truncate || !is_wb) &&
2016 S_ISREG(inode->i_mode) && oldsize 1611 S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) {
2017 truncate_pagecache(inode, out 1612 truncate_pagecache(inode, outarg.attr.size);
2018 invalidate_inode_pages2(mappi !! 1613 invalidate_inode_pages2(inode->i_mapping);
2019 } 1614 }
2020 1615
2021 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi-> 1616 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
2022 out: <<
2023 if (fault_blocked) <<
2024 filemap_invalidate_unlock(map <<
2025 <<
2026 return 0; 1617 return 0;
2027 1618
2028 error: 1619 error:
2029 if (is_truncate) 1620 if (is_truncate)
2030 fuse_release_nowrite(inode); 1621 fuse_release_nowrite(inode);
2031 1622
2032 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi-> 1623 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
2033 <<
2034 if (fault_blocked) <<
2035 filemap_invalidate_unlock(map <<
2036 return err; 1624 return err;
2037 } 1625 }
2038 1626
2039 static int fuse_setattr(struct mnt_idmap *idm !! 1627 static int fuse_setattr(struct dentry *entry, struct iattr *attr)
2040 struct iattr *attr) <<
2041 { 1628 {
2042 struct inode *inode = d_inode(entry); 1629 struct inode *inode = d_inode(entry);
2043 struct fuse_conn *fc = get_fuse_conn( 1630 struct fuse_conn *fc = get_fuse_conn(inode);
2044 struct file *file = (attr->ia_valid & 1631 struct file *file = (attr->ia_valid & ATTR_FILE) ? attr->ia_file : NULL;
2045 int ret; 1632 int ret;
2046 1633
2047 if (fuse_is_bad(inode)) <<
2048 return -EIO; <<
2049 <<
2050 if (!fuse_allow_current_process(get_f 1634 if (!fuse_allow_current_process(get_fuse_conn(inode)))
2051 return -EACCES; 1635 return -EACCES;
2052 1636
2053 if (attr->ia_valid & (ATTR_KILL_SUID 1637 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) {
2054 attr->ia_valid &= ~(ATTR_KILL 1638 attr->ia_valid &= ~(ATTR_KILL_SUID | ATTR_KILL_SGID |
2055 ATTR_MODE 1639 ATTR_MODE);
2056 1640
2057 /* 1641 /*
2058 * The only sane way to relia 1642 * The only sane way to reliably kill suid/sgid is to do it in
2059 * the userspace filesystem 1643 * the userspace filesystem
2060 * 1644 *
2061 * This should be done on wri 1645 * This should be done on write(), truncate() and chown().
2062 */ 1646 */
2063 if (!fc->handle_killpriv && ! !! 1647 if (!fc->handle_killpriv) {
2064 /* 1648 /*
2065 * ia_mode calculatio 1649 * ia_mode calculation may have used stale i_mode.
2066 * Refresh and recalc 1650 * Refresh and recalculate.
2067 */ 1651 */
2068 ret = fuse_do_getattr 1652 ret = fuse_do_getattr(inode, NULL, file);
2069 if (ret) 1653 if (ret)
2070 return ret; 1654 return ret;
2071 1655
2072 attr->ia_mode = inode 1656 attr->ia_mode = inode->i_mode;
2073 if (inode->i_mode & S 1657 if (inode->i_mode & S_ISUID) {
2074 attr->ia_vali 1658 attr->ia_valid |= ATTR_MODE;
2075 attr->ia_mode 1659 attr->ia_mode &= ~S_ISUID;
2076 } 1660 }
2077 if ((inode->i_mode & 1661 if ((inode->i_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
2078 attr->ia_vali 1662 attr->ia_valid |= ATTR_MODE;
2079 attr->ia_mode 1663 attr->ia_mode &= ~S_ISGID;
2080 } 1664 }
2081 } 1665 }
2082 } 1666 }
2083 if (!attr->ia_valid) 1667 if (!attr->ia_valid)
2084 return 0; 1668 return 0;
2085 1669
2086 ret = fuse_do_setattr(entry, attr, fi 1670 ret = fuse_do_setattr(entry, attr, file);
2087 if (!ret) { 1671 if (!ret) {
2088 /* 1672 /*
2089 * If filesystem supports acl 1673 * If filesystem supports acls it may have updated acl xattrs in
2090 * the filesystem, so forget 1674 * the filesystem, so forget cached acls for the inode.
2091 */ 1675 */
2092 if (fc->posix_acl) 1676 if (fc->posix_acl)
2093 forget_all_cached_acl 1677 forget_all_cached_acls(inode);
2094 1678
2095 /* Directory mode changed, ma 1679 /* Directory mode changed, may need to revalidate access */
2096 if (d_is_dir(entry) && (attr- 1680 if (d_is_dir(entry) && (attr->ia_valid & ATTR_MODE))
2097 fuse_invalidate_entry 1681 fuse_invalidate_entry_cache(entry);
2098 } 1682 }
2099 return ret; 1683 return ret;
2100 } 1684 }
2101 1685
2102 static int fuse_getattr(struct mnt_idmap *idm !! 1686 static int fuse_getattr(const struct path *path, struct kstat *stat,
2103 const struct path *pa <<
2104 u32 request_mask, uns 1687 u32 request_mask, unsigned int flags)
2105 { 1688 {
2106 struct inode *inode = d_inode(path->d 1689 struct inode *inode = d_inode(path->dentry);
2107 struct fuse_conn *fc = get_fuse_conn( 1690 struct fuse_conn *fc = get_fuse_conn(inode);
2108 1691
2109 if (fuse_is_bad(inode)) !! 1692 if (!fuse_allow_current_process(fc))
2110 return -EIO; <<
2111 <<
2112 if (!fuse_allow_current_process(fc)) <<
2113 if (!request_mask) { <<
2114 /* <<
2115 * If user explicitly <<
2116 * error out, but ret <<
2117 */ <<
2118 stat->result_mask = 0 <<
2119 stat->dev = inode->i_ <<
2120 return 0; <<
2121 } <<
2122 return -EACCES; 1693 return -EACCES;
2123 } <<
2124 1694
2125 return fuse_update_get_attr(inode, NU 1695 return fuse_update_get_attr(inode, NULL, stat, request_mask, flags);
2126 } 1696 }
2127 1697
2128 static const struct inode_operations fuse_dir 1698 static const struct inode_operations fuse_dir_inode_operations = {
2129 .lookup = fuse_lookup, 1699 .lookup = fuse_lookup,
2130 .mkdir = fuse_mkdir, 1700 .mkdir = fuse_mkdir,
2131 .symlink = fuse_symlink, 1701 .symlink = fuse_symlink,
2132 .unlink = fuse_unlink, 1702 .unlink = fuse_unlink,
2133 .rmdir = fuse_rmdir, 1703 .rmdir = fuse_rmdir,
2134 .rename = fuse_rename2, 1704 .rename = fuse_rename2,
2135 .link = fuse_link, 1705 .link = fuse_link,
2136 .setattr = fuse_setattr, 1706 .setattr = fuse_setattr,
2137 .create = fuse_create, 1707 .create = fuse_create,
2138 .atomic_open = fuse_atomic_open, 1708 .atomic_open = fuse_atomic_open,
2139 .tmpfile = fuse_tmpfile, <<
2140 .mknod = fuse_mknod, 1709 .mknod = fuse_mknod,
2141 .permission = fuse_permission, 1710 .permission = fuse_permission,
2142 .getattr = fuse_getattr, 1711 .getattr = fuse_getattr,
2143 .listxattr = fuse_listxattr, 1712 .listxattr = fuse_listxattr,
2144 .get_inode_acl = fuse_get_inode_acl, <<
2145 .get_acl = fuse_get_acl, 1713 .get_acl = fuse_get_acl,
2146 .set_acl = fuse_set_acl, 1714 .set_acl = fuse_set_acl,
2147 .fileattr_get = fuse_fileattr_get, <<
2148 .fileattr_set = fuse_fileattr_set, <<
2149 }; 1715 };
2150 1716
2151 static const struct file_operations fuse_dir_ 1717 static const struct file_operations fuse_dir_operations = {
2152 .llseek = generic_file_llseek 1718 .llseek = generic_file_llseek,
2153 .read = generic_read_dir, 1719 .read = generic_read_dir,
2154 .iterate_shared = fuse_readdir, 1720 .iterate_shared = fuse_readdir,
2155 .open = fuse_dir_open, 1721 .open = fuse_dir_open,
2156 .release = fuse_dir_release, 1722 .release = fuse_dir_release,
2157 .fsync = fuse_dir_fsync, 1723 .fsync = fuse_dir_fsync,
2158 .unlocked_ioctl = fuse_dir_ioctl, 1724 .unlocked_ioctl = fuse_dir_ioctl,
2159 .compat_ioctl = fuse_dir_compat_ioc 1725 .compat_ioctl = fuse_dir_compat_ioctl,
2160 }; 1726 };
2161 1727
2162 static const struct inode_operations fuse_com 1728 static const struct inode_operations fuse_common_inode_operations = {
2163 .setattr = fuse_setattr, 1729 .setattr = fuse_setattr,
2164 .permission = fuse_permission, 1730 .permission = fuse_permission,
2165 .getattr = fuse_getattr, 1731 .getattr = fuse_getattr,
2166 .listxattr = fuse_listxattr, 1732 .listxattr = fuse_listxattr,
2167 .get_inode_acl = fuse_get_inode_acl, <<
2168 .get_acl = fuse_get_acl, 1733 .get_acl = fuse_get_acl,
2169 .set_acl = fuse_set_acl, 1734 .set_acl = fuse_set_acl,
2170 .fileattr_get = fuse_fileattr_get, <<
2171 .fileattr_set = fuse_fileattr_set, <<
2172 }; 1735 };
2173 1736
2174 static const struct inode_operations fuse_sym 1737 static const struct inode_operations fuse_symlink_inode_operations = {
2175 .setattr = fuse_setattr, 1738 .setattr = fuse_setattr,
2176 .get_link = fuse_get_link, 1739 .get_link = fuse_get_link,
2177 .getattr = fuse_getattr, 1740 .getattr = fuse_getattr,
2178 .listxattr = fuse_listxattr, 1741 .listxattr = fuse_listxattr,
2179 }; 1742 };
2180 1743
2181 void fuse_init_common(struct inode *inode) 1744 void fuse_init_common(struct inode *inode)
2182 { 1745 {
2183 inode->i_op = &fuse_common_inode_oper 1746 inode->i_op = &fuse_common_inode_operations;
2184 } 1747 }
2185 1748
2186 void fuse_init_dir(struct inode *inode) 1749 void fuse_init_dir(struct inode *inode)
2187 { 1750 {
2188 struct fuse_inode *fi = get_fuse_inod 1751 struct fuse_inode *fi = get_fuse_inode(inode);
2189 1752
2190 inode->i_op = &fuse_dir_inode_operati 1753 inode->i_op = &fuse_dir_inode_operations;
2191 inode->i_fop = &fuse_dir_operations; 1754 inode->i_fop = &fuse_dir_operations;
2192 1755
2193 spin_lock_init(&fi->rdc.lock); 1756 spin_lock_init(&fi->rdc.lock);
2194 fi->rdc.cached = false; 1757 fi->rdc.cached = false;
2195 fi->rdc.size = 0; 1758 fi->rdc.size = 0;
2196 fi->rdc.pos = 0; 1759 fi->rdc.pos = 0;
2197 fi->rdc.version = 0; 1760 fi->rdc.version = 0;
2198 } 1761 }
2199 1762
2200 static int fuse_symlink_read_folio(struct fil !! 1763 static int fuse_symlink_readpage(struct file *null, struct page *page)
2201 { 1764 {
2202 int err = fuse_readlink_page(folio->m !! 1765 int err = fuse_readlink_page(page->mapping->host, page);
2203 1766
2204 if (!err) 1767 if (!err)
2205 folio_mark_uptodate(folio); !! 1768 SetPageUptodate(page);
2206 1769
2207 folio_unlock(folio); !! 1770 unlock_page(page);
2208 1771
2209 return err; 1772 return err;
2210 } 1773 }
2211 1774
2212 static const struct address_space_operations 1775 static const struct address_space_operations fuse_symlink_aops = {
2213 .read_folio = fuse_symlink_read_f !! 1776 .readpage = fuse_symlink_readpage,
2214 }; 1777 };
2215 1778
2216 void fuse_init_symlink(struct inode *inode) 1779 void fuse_init_symlink(struct inode *inode)
2217 { 1780 {
2218 inode->i_op = &fuse_symlink_inode_ope 1781 inode->i_op = &fuse_symlink_inode_operations;
2219 inode->i_data.a_ops = &fuse_symlink_a 1782 inode->i_data.a_ops = &fuse_symlink_aops;
2220 inode_nohighmem(inode); 1783 inode_nohighmem(inode);
2221 } 1784 }
2222 1785
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