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> 13 #include <linux/fs_context.h>
14 #include <linux/moduleparam.h> 14 #include <linux/moduleparam.h>
15 #include <linux/sched.h> 15 #include <linux/sched.h>
16 #include <linux/namei.h> 16 #include <linux/namei.h>
17 #include <linux/slab.h> 17 #include <linux/slab.h>
18 #include <linux/xattr.h> 18 #include <linux/xattr.h>
19 #include <linux/iversion.h> 19 #include <linux/iversion.h>
20 #include <linux/posix_acl.h> 20 #include <linux/posix_acl.h>
21 #include <linux/security.h> 21 #include <linux/security.h>
22 #include <linux/types.h> 22 #include <linux/types.h>
23 #include <linux/kernel.h> 23 #include <linux/kernel.h>
24 24
25 static bool __read_mostly allow_sys_admin_acce 25 static bool __read_mostly allow_sys_admin_access;
26 module_param(allow_sys_admin_access, bool, 064 26 module_param(allow_sys_admin_access, bool, 0644);
27 MODULE_PARM_DESC(allow_sys_admin_access, 27 MODULE_PARM_DESC(allow_sys_admin_access,
28 "Allow users with CAP_SYS_ADM 28 "Allow users with CAP_SYS_ADMIN in initial userns to bypass allow_other access check");
29 29
30 static void fuse_advise_use_readdirplus(struct 30 static void fuse_advise_use_readdirplus(struct inode *dir)
31 { 31 {
32 struct fuse_inode *fi = get_fuse_inode 32 struct fuse_inode *fi = get_fuse_inode(dir);
33 33
34 set_bit(FUSE_I_ADVISE_RDPLUS, &fi->sta 34 set_bit(FUSE_I_ADVISE_RDPLUS, &fi->state);
35 } 35 }
36 36
37 #if BITS_PER_LONG >= 64 37 #if BITS_PER_LONG >= 64
38 static inline void __fuse_dentry_settime(struc 38 static inline void __fuse_dentry_settime(struct dentry *entry, u64 time)
39 { 39 {
40 entry->d_fsdata = (void *) time; 40 entry->d_fsdata = (void *) time;
41 } 41 }
42 42
43 static inline u64 fuse_dentry_time(const struc 43 static inline u64 fuse_dentry_time(const struct dentry *entry)
44 { 44 {
45 return (u64)entry->d_fsdata; 45 return (u64)entry->d_fsdata;
46 } 46 }
47 47
48 #else 48 #else
49 union fuse_dentry { 49 union fuse_dentry {
50 u64 time; 50 u64 time;
51 struct rcu_head rcu; 51 struct rcu_head rcu;
52 }; 52 };
53 53
54 static inline void __fuse_dentry_settime(struc 54 static inline void __fuse_dentry_settime(struct dentry *dentry, u64 time)
55 { 55 {
56 ((union fuse_dentry *) dentry->d_fsdat 56 ((union fuse_dentry *) dentry->d_fsdata)->time = time;
57 } 57 }
58 58
59 static inline u64 fuse_dentry_time(const struc 59 static inline u64 fuse_dentry_time(const struct dentry *entry)
60 { 60 {
61 return ((union fuse_dentry *) entry->d 61 return ((union fuse_dentry *) entry->d_fsdata)->time;
62 } 62 }
63 #endif 63 #endif
64 64
65 static void fuse_dentry_settime(struct dentry 65 static void fuse_dentry_settime(struct dentry *dentry, u64 time)
66 { 66 {
67 struct fuse_conn *fc = get_fuse_conn_s 67 struct fuse_conn *fc = get_fuse_conn_super(dentry->d_sb);
68 bool delete = !time && fc->delete_stal 68 bool delete = !time && fc->delete_stale;
69 /* 69 /*
70 * Mess with DCACHE_OP_DELETE because 70 * Mess with DCACHE_OP_DELETE because dput() will be faster without it.
71 * Don't care about races, either way 71 * Don't care about races, either way it's just an optimization
72 */ 72 */
73 if ((!delete && (dentry->d_flags & DCA 73 if ((!delete && (dentry->d_flags & DCACHE_OP_DELETE)) ||
74 (delete && !(dentry->d_flags & DCA 74 (delete && !(dentry->d_flags & DCACHE_OP_DELETE))) {
75 spin_lock(&dentry->d_lock); 75 spin_lock(&dentry->d_lock);
76 if (!delete) 76 if (!delete)
77 dentry->d_flags &= ~DC 77 dentry->d_flags &= ~DCACHE_OP_DELETE;
78 else 78 else
79 dentry->d_flags |= DCA 79 dentry->d_flags |= DCACHE_OP_DELETE;
80 spin_unlock(&dentry->d_lock); 80 spin_unlock(&dentry->d_lock);
81 } 81 }
82 82
83 __fuse_dentry_settime(dentry, time); 83 __fuse_dentry_settime(dentry, time);
84 } 84 }
85 85
86 /* 86 /*
87 * FUSE caches dentries and attributes with se 87 * FUSE caches dentries and attributes with separate timeout. The
88 * time in jiffies until the dentry/attributes 88 * time in jiffies until the dentry/attributes are valid is stored in
89 * dentry->d_fsdata and fuse_inode->i_time res 89 * dentry->d_fsdata and fuse_inode->i_time respectively.
90 */ 90 */
91 91
92 /* 92 /*
93 * Calculate the time in jiffies until a dentr 93 * Calculate the time in jiffies until a dentry/attributes are valid
94 */ 94 */
95 u64 fuse_time_to_jiffies(u64 sec, u32 nsec) 95 u64 fuse_time_to_jiffies(u64 sec, u32 nsec)
96 { 96 {
97 if (sec || nsec) { 97 if (sec || nsec) {
98 struct timespec64 ts = { 98 struct timespec64 ts = {
99 sec, 99 sec,
100 min_t(u32, nsec, NSEC_ 100 min_t(u32, nsec, NSEC_PER_SEC - 1)
101 }; 101 };
102 102
103 return get_jiffies_64() + time 103 return get_jiffies_64() + timespec64_to_jiffies(&ts);
104 } else 104 } else
105 return 0; 105 return 0;
106 } 106 }
107 107
108 /* 108 /*
109 * Set dentry and possibly attribute timeouts 109 * Set dentry and possibly attribute timeouts from the lookup/mk*
110 * replies 110 * replies
111 */ 111 */
112 void fuse_change_entry_timeout(struct dentry * 112 void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o)
113 { 113 {
114 fuse_dentry_settime(entry, 114 fuse_dentry_settime(entry,
115 fuse_time_to_jiffies(o->entry_ 115 fuse_time_to_jiffies(o->entry_valid, o->entry_valid_nsec));
116 } 116 }
117 117
118 void fuse_invalidate_attr_mask(struct inode *i 118 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_mount *fm;
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 && fuse_is_bad(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_EXCL | LOOKUP_REVAL | LOOKUP_RENAME_TARGET))) {
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 fm = get_fuse_mount(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(fm->fc);
229 229
230 parent = dget_parent(entry); 230 parent = dget_parent(entry);
231 fuse_lookup_init(fm->fc, &args 231 fuse_lookup_init(fm->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(fm, &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 (bool) IS_AUTOMOUNT(inode) != (bool) (outarg.attr.flags & FUSE_ATTR_SUBMOUNT)) {
242 fuse_queue_for 242 fuse_queue_forget(fm->fc, forget,
243 243 outarg.nodeid, 1);
244 goto invalid; 244 goto invalid;
245 } 245 }
246 spin_lock(&fi->lock); 246 spin_lock(&fi->lock);
247 fi->nlookup++; 247 fi->nlookup++;
248 spin_unlock(&fi->lock) 248 spin_unlock(&fi->lock);
249 } 249 }
250 kfree(forget); 250 kfree(forget);
251 if (ret == -ENOMEM || ret == - 251 if (ret == -ENOMEM || ret == -EINTR)
252 goto out; 252 goto out;
253 if (ret || fuse_invalid_attr(& 253 if (ret || fuse_invalid_attr(&outarg.attr) ||
254 fuse_stale_inode(inode, ou 254 fuse_stale_inode(inode, outarg.generation, &outarg.attr))
255 goto invalid; 255 goto invalid;
256 256
257 forget_all_cached_acls(inode); 257 forget_all_cached_acls(inode);
258 fuse_change_attributes(inode, 258 fuse_change_attributes(inode, &outarg.attr, NULL,
259 ATTR_TI 259 ATTR_TIMEOUT(&outarg),
260 attr_ve 260 attr_version);
261 fuse_change_entry_timeout(entr 261 fuse_change_entry_timeout(entry, &outarg);
262 } else if (inode) { 262 } else if (inode) {
263 fi = get_fuse_inode(inode); 263 fi = get_fuse_inode(inode);
264 if (flags & LOOKUP_RCU) { 264 if (flags & LOOKUP_RCU) {
265 if (test_bit(FUSE_I_IN 265 if (test_bit(FUSE_I_INIT_RDPLUS, &fi->state))
266 return -ECHILD 266 return -ECHILD;
267 } else if (test_and_clear_bit( 267 } else if (test_and_clear_bit(FUSE_I_INIT_RDPLUS, &fi->state)) {
268 parent = dget_parent(e 268 parent = dget_parent(entry);
269 fuse_advise_use_readdi 269 fuse_advise_use_readdirplus(d_inode(parent));
270 dput(parent); 270 dput(parent);
271 } 271 }
272 } 272 }
273 ret = 1; 273 ret = 1;
274 out: 274 out:
275 return ret; 275 return ret;
276 276
277 invalid: 277 invalid:
278 ret = 0; 278 ret = 0;
279 goto out; 279 goto out;
280 } 280 }
281 281
282 #if BITS_PER_LONG < 64 282 #if BITS_PER_LONG < 64
283 static int fuse_dentry_init(struct dentry *den 283 static int fuse_dentry_init(struct dentry *dentry)
284 { 284 {
285 dentry->d_fsdata = kzalloc(sizeof(unio 285 dentry->d_fsdata = kzalloc(sizeof(union fuse_dentry),
286 GFP_KERNEL_ 286 GFP_KERNEL_ACCOUNT | __GFP_RECLAIMABLE);
287 287
288 return dentry->d_fsdata ? 0 : -ENOMEM; 288 return dentry->d_fsdata ? 0 : -ENOMEM;
289 } 289 }
290 static void fuse_dentry_release(struct dentry 290 static void fuse_dentry_release(struct dentry *dentry)
291 { 291 {
292 union fuse_dentry *fd = dentry->d_fsda 292 union fuse_dentry *fd = dentry->d_fsdata;
293 293
294 kfree_rcu(fd, rcu); 294 kfree_rcu(fd, rcu);
295 } 295 }
296 #endif 296 #endif
297 297
298 static int fuse_dentry_delete(const struct den 298 static int fuse_dentry_delete(const struct dentry *dentry)
299 { 299 {
300 return time_before64(fuse_dentry_time( 300 return time_before64(fuse_dentry_time(dentry), get_jiffies_64());
301 } 301 }
302 302
303 /* 303 /*
304 * Create a fuse_mount object with a new super 304 * Create a fuse_mount object with a new superblock (with path->dentry
305 * as the root), and return that mount so it c 305 * as the root), and return that mount so it can be auto-mounted on
306 * @path. 306 * @path.
307 */ 307 */
308 static struct vfsmount *fuse_dentry_automount( 308 static struct vfsmount *fuse_dentry_automount(struct path *path)
309 { 309 {
310 struct fs_context *fsc; 310 struct fs_context *fsc;
311 struct vfsmount *mnt; 311 struct vfsmount *mnt;
312 struct fuse_inode *mp_fi = get_fuse_in 312 struct fuse_inode *mp_fi = get_fuse_inode(d_inode(path->dentry));
313 313
314 fsc = fs_context_for_submount(path->mn 314 fsc = fs_context_for_submount(path->mnt->mnt_sb->s_type, path->dentry);
315 if (IS_ERR(fsc)) 315 if (IS_ERR(fsc))
316 return ERR_CAST(fsc); 316 return ERR_CAST(fsc);
317 317
318 /* Pass the FUSE inode of the mount fo 318 /* Pass the FUSE inode of the mount for fuse_get_tree_submount() */
319 fsc->fs_private = mp_fi; 319 fsc->fs_private = mp_fi;
320 320
321 /* Create the submount */ 321 /* Create the submount */
322 mnt = fc_mount(fsc); 322 mnt = fc_mount(fsc);
323 if (!IS_ERR(mnt)) 323 if (!IS_ERR(mnt))
324 mntget(mnt); 324 mntget(mnt);
325 325
326 put_fs_context(fsc); 326 put_fs_context(fsc);
327 return mnt; 327 return mnt;
328 } 328 }
329 329
330 const struct dentry_operations fuse_dentry_ope 330 const struct dentry_operations fuse_dentry_operations = {
331 .d_revalidate = fuse_dentry_revalida 331 .d_revalidate = fuse_dentry_revalidate,
332 .d_delete = fuse_dentry_delete, 332 .d_delete = fuse_dentry_delete,
333 #if BITS_PER_LONG < 64 333 #if BITS_PER_LONG < 64
334 .d_init = fuse_dentry_init, 334 .d_init = fuse_dentry_init,
335 .d_release = fuse_dentry_release, 335 .d_release = fuse_dentry_release,
336 #endif 336 #endif
337 .d_automount = fuse_dentry_automoun 337 .d_automount = fuse_dentry_automount,
338 }; 338 };
339 339
340 const struct dentry_operations fuse_root_dentr 340 const struct dentry_operations fuse_root_dentry_operations = {
341 #if BITS_PER_LONG < 64 341 #if BITS_PER_LONG < 64
342 .d_init = fuse_dentry_init, 342 .d_init = fuse_dentry_init,
343 .d_release = fuse_dentry_release, 343 .d_release = fuse_dentry_release,
344 #endif 344 #endif
345 }; 345 };
346 346
347 int fuse_valid_type(int m) 347 int fuse_valid_type(int m)
348 { 348 {
349 return S_ISREG(m) || S_ISDIR(m) || S_I 349 return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) ||
350 S_ISBLK(m) || S_ISFIFO(m) || S 350 S_ISBLK(m) || S_ISFIFO(m) || S_ISSOCK(m);
351 } 351 }
352 352
353 static bool fuse_valid_size(u64 size) 353 static bool fuse_valid_size(u64 size)
354 { 354 {
355 return size <= LLONG_MAX; 355 return size <= LLONG_MAX;
356 } 356 }
357 357
358 bool fuse_invalid_attr(struct fuse_attr *attr) 358 bool fuse_invalid_attr(struct fuse_attr *attr)
359 { 359 {
360 return !fuse_valid_type(attr->mode) || 360 return !fuse_valid_type(attr->mode) || !fuse_valid_size(attr->size);
361 } 361 }
362 362
363 int fuse_lookup_name(struct super_block *sb, u 363 int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name,
364 struct fuse_entry_out *ou 364 struct fuse_entry_out *outarg, struct inode **inode)
365 { 365 {
366 struct fuse_mount *fm = get_fuse_mount 366 struct fuse_mount *fm = get_fuse_mount_super(sb);
367 FUSE_ARGS(args); 367 FUSE_ARGS(args);
368 struct fuse_forget_link *forget; 368 struct fuse_forget_link *forget;
369 u64 attr_version; 369 u64 attr_version;
370 int err; 370 int err;
371 371
372 *inode = NULL; 372 *inode = NULL;
373 err = -ENAMETOOLONG; 373 err = -ENAMETOOLONG;
374 if (name->len > FUSE_NAME_MAX) 374 if (name->len > FUSE_NAME_MAX)
375 goto out; 375 goto out;
376 376
377 377
378 forget = fuse_alloc_forget(); 378 forget = fuse_alloc_forget();
379 err = -ENOMEM; 379 err = -ENOMEM;
380 if (!forget) 380 if (!forget)
381 goto out; 381 goto out;
382 382
383 attr_version = fuse_get_attr_version(f 383 attr_version = fuse_get_attr_version(fm->fc);
384 384
385 fuse_lookup_init(fm->fc, &args, nodeid 385 fuse_lookup_init(fm->fc, &args, nodeid, name, outarg);
386 err = fuse_simple_request(fm, &args); 386 err = fuse_simple_request(fm, &args);
387 /* Zero nodeid is same as -ENOENT, but 387 /* Zero nodeid is same as -ENOENT, but with valid timeout */
388 if (err || !outarg->nodeid) 388 if (err || !outarg->nodeid)
389 goto out_put_forget; 389 goto out_put_forget;
390 390
391 err = -EIO; 391 err = -EIO;
392 if (fuse_invalid_attr(&outarg->attr)) 392 if (fuse_invalid_attr(&outarg->attr))
393 goto out_put_forget; 393 goto out_put_forget;
394 if (outarg->nodeid == FUSE_ROOT_ID && 394 if (outarg->nodeid == FUSE_ROOT_ID && outarg->generation != 0) {
395 pr_warn_once("root generation 395 pr_warn_once("root generation should be zero\n");
396 outarg->generation = 0; 396 outarg->generation = 0;
397 } 397 }
398 398
399 *inode = fuse_iget(sb, outarg->nodeid, 399 *inode = fuse_iget(sb, outarg->nodeid, outarg->generation,
400 &outarg->attr, ATTR 400 &outarg->attr, ATTR_TIMEOUT(outarg),
401 attr_version); 401 attr_version);
402 err = -ENOMEM; 402 err = -ENOMEM;
403 if (!*inode) { 403 if (!*inode) {
404 fuse_queue_forget(fm->fc, forg 404 fuse_queue_forget(fm->fc, forget, outarg->nodeid, 1);
405 goto out; 405 goto out;
406 } 406 }
407 err = 0; 407 err = 0;
408 408
409 out_put_forget: 409 out_put_forget:
410 kfree(forget); 410 kfree(forget);
411 out: 411 out:
412 return err; 412 return err;
413 } 413 }
414 414
415 static struct dentry *fuse_lookup(struct inode 415 static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
416 unsigned int 416 unsigned int flags)
417 { 417 {
418 int err; 418 int err;
419 struct fuse_entry_out outarg; 419 struct fuse_entry_out outarg;
420 struct inode *inode; 420 struct inode *inode;
421 struct dentry *newent; 421 struct dentry *newent;
422 bool outarg_valid = true; 422 bool outarg_valid = true;
423 bool locked; 423 bool locked;
424 424
425 if (fuse_is_bad(dir)) 425 if (fuse_is_bad(dir))
426 return ERR_PTR(-EIO); 426 return ERR_PTR(-EIO);
427 427
428 locked = fuse_lock_inode(dir); 428 locked = fuse_lock_inode(dir);
429 err = fuse_lookup_name(dir->i_sb, get_ 429 err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
430 &outarg, &inode 430 &outarg, &inode);
431 fuse_unlock_inode(dir, locked); 431 fuse_unlock_inode(dir, locked);
432 if (err == -ENOENT) { 432 if (err == -ENOENT) {
433 outarg_valid = false; 433 outarg_valid = false;
434 err = 0; 434 err = 0;
435 } 435 }
436 if (err) 436 if (err)
437 goto out_err; 437 goto out_err;
438 438
439 err = -EIO; 439 err = -EIO;
440 if (inode && get_node_id(inode) == FUS 440 if (inode && get_node_id(inode) == FUSE_ROOT_ID)
441 goto out_iput; 441 goto out_iput;
442 442
443 newent = d_splice_alias(inode, entry); 443 newent = d_splice_alias(inode, entry);
444 err = PTR_ERR(newent); 444 err = PTR_ERR(newent);
445 if (IS_ERR(newent)) 445 if (IS_ERR(newent))
446 goto out_err; 446 goto out_err;
447 447
448 entry = newent ? newent : entry; 448 entry = newent ? newent : entry;
449 if (outarg_valid) 449 if (outarg_valid)
450 fuse_change_entry_timeout(entr 450 fuse_change_entry_timeout(entry, &outarg);
451 else 451 else
452 fuse_invalidate_entry_cache(en 452 fuse_invalidate_entry_cache(entry);
453 453
454 if (inode) 454 if (inode)
455 fuse_advise_use_readdirplus(di 455 fuse_advise_use_readdirplus(dir);
456 return newent; 456 return newent;
457 457
458 out_iput: 458 out_iput:
459 iput(inode); 459 iput(inode);
460 out_err: 460 out_err:
461 return ERR_PTR(err); 461 return ERR_PTR(err);
462 } 462 }
463 463
464 static int get_security_context(struct dentry 464 static int get_security_context(struct dentry *entry, umode_t mode,
465 struct fuse_in 465 struct fuse_in_arg *ext)
466 { 466 {
467 struct fuse_secctx *fctx; 467 struct fuse_secctx *fctx;
468 struct fuse_secctx_header *header; 468 struct fuse_secctx_header *header;
469 void *ctx = NULL, *ptr; 469 void *ctx = NULL, *ptr;
470 u32 ctxlen, total_len = sizeof(*header 470 u32 ctxlen, total_len = sizeof(*header);
471 int err, nr_ctx = 0; 471 int err, nr_ctx = 0;
472 const char *name; 472 const char *name;
473 size_t namelen; 473 size_t namelen;
474 474
475 err = security_dentry_init_security(en 475 err = security_dentry_init_security(entry, mode, &entry->d_name,
476 &n 476 &name, &ctx, &ctxlen);
477 if (err) { 477 if (err) {
478 if (err != -EOPNOTSUPP) 478 if (err != -EOPNOTSUPP)
479 goto out_err; 479 goto out_err;
480 /* No LSM is supporting this s 480 /* No LSM is supporting this security hook. Ignore error */
481 ctxlen = 0; 481 ctxlen = 0;
482 ctx = NULL; 482 ctx = NULL;
483 } 483 }
484 484
485 if (ctxlen) { 485 if (ctxlen) {
486 nr_ctx = 1; 486 nr_ctx = 1;
487 namelen = strlen(name) + 1; 487 namelen = strlen(name) + 1;
488 err = -EIO; 488 err = -EIO;
489 if (WARN_ON(namelen > XATTR_NA 489 if (WARN_ON(namelen > XATTR_NAME_MAX + 1 || ctxlen > S32_MAX))
490 goto out_err; 490 goto out_err;
491 total_len += FUSE_REC_ALIGN(si 491 total_len += FUSE_REC_ALIGN(sizeof(*fctx) + namelen + ctxlen);
492 } 492 }
493 493
494 err = -ENOMEM; 494 err = -ENOMEM;
495 header = ptr = kzalloc(total_len, GFP_ 495 header = ptr = kzalloc(total_len, GFP_KERNEL);
496 if (!ptr) 496 if (!ptr)
497 goto out_err; 497 goto out_err;
498 498
499 header->nr_secctx = nr_ctx; 499 header->nr_secctx = nr_ctx;
500 header->size = total_len; 500 header->size = total_len;
501 ptr += sizeof(*header); 501 ptr += sizeof(*header);
502 if (nr_ctx) { 502 if (nr_ctx) {
503 fctx = ptr; 503 fctx = ptr;
504 fctx->size = ctxlen; 504 fctx->size = ctxlen;
505 ptr += sizeof(*fctx); 505 ptr += sizeof(*fctx);
506 506
507 strcpy(ptr, name); 507 strcpy(ptr, name);
508 ptr += namelen; 508 ptr += namelen;
509 509
510 memcpy(ptr, ctx, ctxlen); 510 memcpy(ptr, ctx, ctxlen);
511 } 511 }
512 ext->size = total_len; 512 ext->size = total_len;
513 ext->value = header; 513 ext->value = header;
514 err = 0; 514 err = 0;
515 out_err: 515 out_err:
516 kfree(ctx); 516 kfree(ctx);
517 return err; 517 return err;
518 } 518 }
519 519
520 static void *extend_arg(struct fuse_in_arg *bu 520 static void *extend_arg(struct fuse_in_arg *buf, u32 bytes)
521 { 521 {
522 void *p; 522 void *p;
523 u32 newlen = buf->size + bytes; 523 u32 newlen = buf->size + bytes;
524 524
525 p = krealloc(buf->value, newlen, GFP_K 525 p = krealloc(buf->value, newlen, GFP_KERNEL);
526 if (!p) { 526 if (!p) {
527 kfree(buf->value); 527 kfree(buf->value);
528 buf->size = 0; 528 buf->size = 0;
529 buf->value = NULL; 529 buf->value = NULL;
530 return NULL; 530 return NULL;
531 } 531 }
532 532
533 memset(p + buf->size, 0, bytes); 533 memset(p + buf->size, 0, bytes);
534 buf->value = p; 534 buf->value = p;
535 buf->size = newlen; 535 buf->size = newlen;
536 536
537 return p + newlen - bytes; 537 return p + newlen - bytes;
538 } 538 }
539 539
540 static u32 fuse_ext_size(size_t size) 540 static u32 fuse_ext_size(size_t size)
541 { 541 {
542 return FUSE_REC_ALIGN(sizeof(struct fu 542 return FUSE_REC_ALIGN(sizeof(struct fuse_ext_header) + size);
543 } 543 }
544 544
545 /* 545 /*
546 * This adds just a single supplementary group 546 * This adds just a single supplementary group that matches the parent's group.
547 */ 547 */
548 static int get_create_supp_group(struct inode 548 static int get_create_supp_group(struct inode *dir, struct fuse_in_arg *ext)
549 { 549 {
550 struct fuse_conn *fc = get_fuse_conn(d 550 struct fuse_conn *fc = get_fuse_conn(dir);
551 struct fuse_ext_header *xh; 551 struct fuse_ext_header *xh;
552 struct fuse_supp_groups *sg; 552 struct fuse_supp_groups *sg;
553 kgid_t kgid = dir->i_gid; 553 kgid_t kgid = dir->i_gid;
554 gid_t parent_gid = from_kgid(fc->user_ 554 gid_t parent_gid = from_kgid(fc->user_ns, kgid);
555 u32 sg_len = fuse_ext_size(sizeof(*sg) 555 u32 sg_len = fuse_ext_size(sizeof(*sg) + sizeof(sg->groups[0]));
556 556
557 if (parent_gid == (gid_t) -1 || gid_eq 557 if (parent_gid == (gid_t) -1 || gid_eq(kgid, current_fsgid()) ||
558 !in_group_p(kgid)) 558 !in_group_p(kgid))
559 return 0; 559 return 0;
560 560
561 xh = extend_arg(ext, sg_len); 561 xh = extend_arg(ext, sg_len);
562 if (!xh) 562 if (!xh)
563 return -ENOMEM; 563 return -ENOMEM;
564 564
565 xh->size = sg_len; 565 xh->size = sg_len;
566 xh->type = FUSE_EXT_GROUPS; 566 xh->type = FUSE_EXT_GROUPS;
567 567
568 sg = (struct fuse_supp_groups *) &xh[1 568 sg = (struct fuse_supp_groups *) &xh[1];
569 sg->nr_groups = 1; 569 sg->nr_groups = 1;
570 sg->groups[0] = parent_gid; 570 sg->groups[0] = parent_gid;
571 571
572 return 0; 572 return 0;
573 } 573 }
574 574
575 static int get_create_ext(struct fuse_args *ar 575 static int get_create_ext(struct fuse_args *args,
576 struct inode *dir, s 576 struct inode *dir, struct dentry *dentry,
577 umode_t mode) 577 umode_t mode)
578 { 578 {
579 struct fuse_conn *fc = get_fuse_conn_s 579 struct fuse_conn *fc = get_fuse_conn_super(dentry->d_sb);
580 struct fuse_in_arg ext = { .size = 0, 580 struct fuse_in_arg ext = { .size = 0, .value = NULL };
581 int err = 0; 581 int err = 0;
582 582
583 if (fc->init_security) 583 if (fc->init_security)
584 err = get_security_context(den 584 err = get_security_context(dentry, mode, &ext);
585 if (!err && fc->create_supp_group) 585 if (!err && fc->create_supp_group)
586 err = get_create_supp_group(di 586 err = get_create_supp_group(dir, &ext);
587 587
588 if (!err && ext.size) { 588 if (!err && ext.size) {
589 WARN_ON(args->in_numargs >= AR 589 WARN_ON(args->in_numargs >= ARRAY_SIZE(args->in_args));
590 args->is_ext = true; 590 args->is_ext = true;
591 args->ext_idx = args->in_numar 591 args->ext_idx = args->in_numargs++;
592 args->in_args[args->ext_idx] = 592 args->in_args[args->ext_idx] = ext;
593 } else { 593 } else {
594 kfree(ext.value); 594 kfree(ext.value);
595 } 595 }
596 596
597 return err; 597 return err;
598 } 598 }
599 599
600 static void free_ext_value(struct fuse_args *a 600 static void free_ext_value(struct fuse_args *args)
601 { 601 {
602 if (args->is_ext) 602 if (args->is_ext)
603 kfree(args->in_args[args->ext_ 603 kfree(args->in_args[args->ext_idx].value);
604 } 604 }
605 605
606 /* 606 /*
607 * Atomic create+open operation 607 * Atomic create+open operation
608 * 608 *
609 * If the filesystem doesn't support this, the 609 * If the filesystem doesn't support this, then fall back to separate
610 * 'mknod' + 'open' requests. 610 * 'mknod' + 'open' requests.
611 */ 611 */
612 static int fuse_create_open(struct inode *dir, 612 static int fuse_create_open(struct inode *dir, struct dentry *entry,
613 struct file *file, 613 struct file *file, unsigned int flags,
614 umode_t mode, u32 614 umode_t mode, u32 opcode)
615 { 615 {
616 int err; 616 int err;
617 struct inode *inode; 617 struct inode *inode;
618 struct fuse_mount *fm = get_fuse_mount 618 struct fuse_mount *fm = get_fuse_mount(dir);
619 FUSE_ARGS(args); 619 FUSE_ARGS(args);
620 struct fuse_forget_link *forget; 620 struct fuse_forget_link *forget;
621 struct fuse_create_in inarg; 621 struct fuse_create_in inarg;
622 struct fuse_open_out *outopenp; !! 622 struct fuse_open_out outopen;
623 struct fuse_entry_out outentry; 623 struct fuse_entry_out outentry;
624 struct fuse_inode *fi; 624 struct fuse_inode *fi;
625 struct fuse_file *ff; 625 struct fuse_file *ff;
626 bool trunc = flags & O_TRUNC; 626 bool trunc = flags & O_TRUNC;
627 627
628 /* Userspace expects S_IFREG in create 628 /* Userspace expects S_IFREG in create mode */
629 BUG_ON((mode & S_IFMT) != S_IFREG); 629 BUG_ON((mode & S_IFMT) != S_IFREG);
630 630
631 forget = fuse_alloc_forget(); 631 forget = fuse_alloc_forget();
632 err = -ENOMEM; 632 err = -ENOMEM;
633 if (!forget) 633 if (!forget)
634 goto out_err; 634 goto out_err;
635 635
636 err = -ENOMEM; 636 err = -ENOMEM;
637 ff = fuse_file_alloc(fm, true); !! 637 ff = fuse_file_alloc(fm);
638 if (!ff) 638 if (!ff)
639 goto out_put_forget_req; 639 goto out_put_forget_req;
640 640
641 if (!fm->fc->dont_mask) 641 if (!fm->fc->dont_mask)
642 mode &= ~current_umask(); 642 mode &= ~current_umask();
643 643
644 flags &= ~O_NOCTTY; 644 flags &= ~O_NOCTTY;
645 memset(&inarg, 0, sizeof(inarg)); 645 memset(&inarg, 0, sizeof(inarg));
646 memset(&outentry, 0, sizeof(outentry)) 646 memset(&outentry, 0, sizeof(outentry));
647 inarg.flags = flags; 647 inarg.flags = flags;
648 inarg.mode = mode; 648 inarg.mode = mode;
649 inarg.umask = current_umask(); 649 inarg.umask = current_umask();
650 650
651 if (fm->fc->handle_killpriv_v2 && trun 651 if (fm->fc->handle_killpriv_v2 && trunc &&
652 !(flags & O_EXCL) && !capable(CAP_ 652 !(flags & O_EXCL) && !capable(CAP_FSETID)) {
653 inarg.open_flags |= FUSE_OPEN_ 653 inarg.open_flags |= FUSE_OPEN_KILL_SUIDGID;
654 } 654 }
655 655
656 args.opcode = opcode; 656 args.opcode = opcode;
657 args.nodeid = get_node_id(dir); 657 args.nodeid = get_node_id(dir);
658 args.in_numargs = 2; 658 args.in_numargs = 2;
659 args.in_args[0].size = sizeof(inarg); 659 args.in_args[0].size = sizeof(inarg);
660 args.in_args[0].value = &inarg; 660 args.in_args[0].value = &inarg;
661 args.in_args[1].size = entry->d_name.l 661 args.in_args[1].size = entry->d_name.len + 1;
662 args.in_args[1].value = entry->d_name. 662 args.in_args[1].value = entry->d_name.name;
663 args.out_numargs = 2; 663 args.out_numargs = 2;
664 args.out_args[0].size = sizeof(outentr 664 args.out_args[0].size = sizeof(outentry);
665 args.out_args[0].value = &outentry; 665 args.out_args[0].value = &outentry;
666 /* Store outarg for fuse_finish_open() !! 666 args.out_args[1].size = sizeof(outopen);
667 outopenp = &ff->args->open_outarg; !! 667 args.out_args[1].value = &outopen;
668 args.out_args[1].size = sizeof(*outope <<
669 args.out_args[1].value = outopenp; <<
670 668
671 err = get_create_ext(&args, dir, entry 669 err = get_create_ext(&args, dir, entry, mode);
672 if (err) 670 if (err)
673 goto out_put_forget_req; 671 goto out_put_forget_req;
674 672
675 err = fuse_simple_request(fm, &args); 673 err = fuse_simple_request(fm, &args);
676 free_ext_value(&args); 674 free_ext_value(&args);
677 if (err) 675 if (err)
678 goto out_free_ff; 676 goto out_free_ff;
679 677
680 err = -EIO; 678 err = -EIO;
681 if (!S_ISREG(outentry.attr.mode) || in 679 if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid) ||
682 fuse_invalid_attr(&outentry.attr)) 680 fuse_invalid_attr(&outentry.attr))
683 goto out_free_ff; 681 goto out_free_ff;
684 682
685 ff->fh = outopenp->fh; !! 683 ff->fh = outopen.fh;
686 ff->nodeid = outentry.nodeid; 684 ff->nodeid = outentry.nodeid;
687 ff->open_flags = outopenp->open_flags; !! 685 ff->open_flags = outopen.open_flags;
688 inode = fuse_iget(dir->i_sb, outentry. 686 inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
689 &outentry.attr, ATTR 687 &outentry.attr, ATTR_TIMEOUT(&outentry), 0);
690 if (!inode) { 688 if (!inode) {
691 flags &= ~(O_CREAT | O_EXCL | 689 flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
692 fuse_sync_release(NULL, ff, fl 690 fuse_sync_release(NULL, ff, flags);
693 fuse_queue_forget(fm->fc, forg 691 fuse_queue_forget(fm->fc, forget, outentry.nodeid, 1);
694 err = -ENOMEM; 692 err = -ENOMEM;
695 goto out_err; 693 goto out_err;
696 } 694 }
697 kfree(forget); 695 kfree(forget);
698 d_instantiate(entry, inode); 696 d_instantiate(entry, inode);
699 fuse_change_entry_timeout(entry, &oute 697 fuse_change_entry_timeout(entry, &outentry);
700 fuse_dir_changed(dir); 698 fuse_dir_changed(dir);
701 err = generic_file_open(inode, file); !! 699 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) { 700 if (err) {
707 fi = get_fuse_inode(inode); 701 fi = get_fuse_inode(inode);
708 fuse_sync_release(fi, ff, flag 702 fuse_sync_release(fi, ff, flags);
709 } else { 703 } else {
>> 704 file->private_data = ff;
>> 705 fuse_finish_open(inode, file);
710 if (fm->fc->atomic_o_trunc && 706 if (fm->fc->atomic_o_trunc && trunc)
711 truncate_pagecache(ino 707 truncate_pagecache(inode, 0);
712 else if (!(ff->open_flags & FO 708 else if (!(ff->open_flags & FOPEN_KEEP_CACHE))
713 invalidate_inode_pages 709 invalidate_inode_pages2(inode->i_mapping);
714 } 710 }
715 return err; 711 return err;
716 712
717 out_free_ff: 713 out_free_ff:
718 fuse_file_free(ff); 714 fuse_file_free(ff);
719 out_put_forget_req: 715 out_put_forget_req:
720 kfree(forget); 716 kfree(forget);
721 out_err: 717 out_err:
722 return err; 718 return err;
723 } 719 }
724 720
725 static int fuse_mknod(struct mnt_idmap *, stru 721 static int fuse_mknod(struct mnt_idmap *, struct inode *, struct dentry *,
726 umode_t, dev_t); 722 umode_t, dev_t);
727 static int fuse_atomic_open(struct inode *dir, 723 static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
728 struct file *file, 724 struct file *file, unsigned flags,
729 umode_t mode) 725 umode_t mode)
730 { 726 {
731 int err; 727 int err;
732 struct fuse_conn *fc = get_fuse_conn(d 728 struct fuse_conn *fc = get_fuse_conn(dir);
733 struct dentry *res = NULL; 729 struct dentry *res = NULL;
734 730
735 if (fuse_is_bad(dir)) 731 if (fuse_is_bad(dir))
736 return -EIO; 732 return -EIO;
737 733
738 if (d_in_lookup(entry)) { 734 if (d_in_lookup(entry)) {
739 res = fuse_lookup(dir, entry, 735 res = fuse_lookup(dir, entry, 0);
740 if (IS_ERR(res)) 736 if (IS_ERR(res))
741 return PTR_ERR(res); 737 return PTR_ERR(res);
742 738
743 if (res) 739 if (res)
744 entry = res; 740 entry = res;
745 } 741 }
746 742
747 if (!(flags & O_CREAT) || d_really_is_ 743 if (!(flags & O_CREAT) || d_really_is_positive(entry))
748 goto no_open; 744 goto no_open;
749 745
750 /* Only creates */ 746 /* Only creates */
751 file->f_mode |= FMODE_CREATED; 747 file->f_mode |= FMODE_CREATED;
752 748
753 if (fc->no_create) 749 if (fc->no_create)
754 goto mknod; 750 goto mknod;
755 751
756 err = fuse_create_open(dir, entry, fil 752 err = fuse_create_open(dir, entry, file, flags, mode, FUSE_CREATE);
757 if (err == -ENOSYS) { 753 if (err == -ENOSYS) {
758 fc->no_create = 1; 754 fc->no_create = 1;
759 goto mknod; 755 goto mknod;
760 } else if (err == -EEXIST) 756 } else if (err == -EEXIST)
761 fuse_invalidate_entry(entry); 757 fuse_invalidate_entry(entry);
762 out_dput: 758 out_dput:
763 dput(res); 759 dput(res);
764 return err; 760 return err;
765 761
766 mknod: 762 mknod:
767 err = fuse_mknod(&nop_mnt_idmap, dir, 763 err = fuse_mknod(&nop_mnt_idmap, dir, entry, mode, 0);
768 if (err) 764 if (err)
769 goto out_dput; 765 goto out_dput;
770 no_open: 766 no_open:
771 return finish_no_open(file, res); 767 return finish_no_open(file, res);
772 } 768 }
773 769
774 /* 770 /*
775 * Code shared between mknod, mkdir, symlink a 771 * Code shared between mknod, mkdir, symlink and link
776 */ 772 */
777 static int create_new_entry(struct fuse_mount 773 static int create_new_entry(struct fuse_mount *fm, struct fuse_args *args,
778 struct inode *dir, 774 struct inode *dir, struct dentry *entry,
779 umode_t mode) 775 umode_t mode)
780 { 776 {
781 struct fuse_entry_out outarg; 777 struct fuse_entry_out outarg;
782 struct inode *inode; 778 struct inode *inode;
783 struct dentry *d; 779 struct dentry *d;
784 int err; 780 int err;
785 struct fuse_forget_link *forget; 781 struct fuse_forget_link *forget;
786 782
787 if (fuse_is_bad(dir)) 783 if (fuse_is_bad(dir))
788 return -EIO; 784 return -EIO;
789 785
790 forget = fuse_alloc_forget(); 786 forget = fuse_alloc_forget();
791 if (!forget) 787 if (!forget)
792 return -ENOMEM; 788 return -ENOMEM;
793 789
794 memset(&outarg, 0, sizeof(outarg)); 790 memset(&outarg, 0, sizeof(outarg));
795 args->nodeid = get_node_id(dir); 791 args->nodeid = get_node_id(dir);
796 args->out_numargs = 1; 792 args->out_numargs = 1;
797 args->out_args[0].size = sizeof(outarg 793 args->out_args[0].size = sizeof(outarg);
798 args->out_args[0].value = &outarg; 794 args->out_args[0].value = &outarg;
799 795
800 if (args->opcode != FUSE_LINK) { 796 if (args->opcode != FUSE_LINK) {
801 err = get_create_ext(args, dir 797 err = get_create_ext(args, dir, entry, mode);
802 if (err) 798 if (err)
803 goto out_put_forget_re 799 goto out_put_forget_req;
804 } 800 }
805 801
806 err = fuse_simple_request(fm, args); 802 err = fuse_simple_request(fm, args);
807 free_ext_value(args); 803 free_ext_value(args);
808 if (err) 804 if (err)
809 goto out_put_forget_req; 805 goto out_put_forget_req;
810 806
811 err = -EIO; 807 err = -EIO;
812 if (invalid_nodeid(outarg.nodeid) || f 808 if (invalid_nodeid(outarg.nodeid) || fuse_invalid_attr(&outarg.attr))
813 goto out_put_forget_req; 809 goto out_put_forget_req;
814 810
815 if ((outarg.attr.mode ^ mode) & S_IFMT 811 if ((outarg.attr.mode ^ mode) & S_IFMT)
816 goto out_put_forget_req; 812 goto out_put_forget_req;
817 813
818 inode = fuse_iget(dir->i_sb, outarg.no 814 inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
819 &outarg.attr, ATTR_T 815 &outarg.attr, ATTR_TIMEOUT(&outarg), 0);
820 if (!inode) { 816 if (!inode) {
821 fuse_queue_forget(fm->fc, forg 817 fuse_queue_forget(fm->fc, forget, outarg.nodeid, 1);
822 return -ENOMEM; 818 return -ENOMEM;
823 } 819 }
824 kfree(forget); 820 kfree(forget);
825 821
826 d_drop(entry); 822 d_drop(entry);
827 d = d_splice_alias(inode, entry); 823 d = d_splice_alias(inode, entry);
828 if (IS_ERR(d)) 824 if (IS_ERR(d))
829 return PTR_ERR(d); 825 return PTR_ERR(d);
830 826
831 if (d) { 827 if (d) {
832 fuse_change_entry_timeout(d, & 828 fuse_change_entry_timeout(d, &outarg);
833 dput(d); 829 dput(d);
834 } else { 830 } else {
835 fuse_change_entry_timeout(entr 831 fuse_change_entry_timeout(entry, &outarg);
836 } 832 }
837 fuse_dir_changed(dir); 833 fuse_dir_changed(dir);
838 return 0; 834 return 0;
839 835
840 out_put_forget_req: 836 out_put_forget_req:
841 if (err == -EEXIST) 837 if (err == -EEXIST)
842 fuse_invalidate_entry(entry); 838 fuse_invalidate_entry(entry);
843 kfree(forget); 839 kfree(forget);
844 return err; 840 return err;
845 } 841 }
846 842
847 static int fuse_mknod(struct mnt_idmap *idmap, 843 static int fuse_mknod(struct mnt_idmap *idmap, struct inode *dir,
848 struct dentry *entry, um 844 struct dentry *entry, umode_t mode, dev_t rdev)
849 { 845 {
850 struct fuse_mknod_in inarg; 846 struct fuse_mknod_in inarg;
851 struct fuse_mount *fm = get_fuse_mount 847 struct fuse_mount *fm = get_fuse_mount(dir);
852 FUSE_ARGS(args); 848 FUSE_ARGS(args);
853 849
854 if (!fm->fc->dont_mask) 850 if (!fm->fc->dont_mask)
855 mode &= ~current_umask(); 851 mode &= ~current_umask();
856 852
857 memset(&inarg, 0, sizeof(inarg)); 853 memset(&inarg, 0, sizeof(inarg));
858 inarg.mode = mode; 854 inarg.mode = mode;
859 inarg.rdev = new_encode_dev(rdev); 855 inarg.rdev = new_encode_dev(rdev);
860 inarg.umask = current_umask(); 856 inarg.umask = current_umask();
861 args.opcode = FUSE_MKNOD; 857 args.opcode = FUSE_MKNOD;
862 args.in_numargs = 2; 858 args.in_numargs = 2;
863 args.in_args[0].size = sizeof(inarg); 859 args.in_args[0].size = sizeof(inarg);
864 args.in_args[0].value = &inarg; 860 args.in_args[0].value = &inarg;
865 args.in_args[1].size = entry->d_name.l 861 args.in_args[1].size = entry->d_name.len + 1;
866 args.in_args[1].value = entry->d_name. 862 args.in_args[1].value = entry->d_name.name;
867 return create_new_entry(fm, &args, dir 863 return create_new_entry(fm, &args, dir, entry, mode);
868 } 864 }
869 865
870 static int fuse_create(struct mnt_idmap *idmap 866 static int fuse_create(struct mnt_idmap *idmap, struct inode *dir,
871 struct dentry *entry, u 867 struct dentry *entry, umode_t mode, bool excl)
872 { 868 {
873 return fuse_mknod(&nop_mnt_idmap, dir, 869 return fuse_mknod(&nop_mnt_idmap, dir, entry, mode, 0);
874 } 870 }
875 871
876 static int fuse_tmpfile(struct mnt_idmap *idma 872 static int fuse_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
877 struct file *file, umo 873 struct file *file, umode_t mode)
878 { 874 {
879 struct fuse_conn *fc = get_fuse_conn(d 875 struct fuse_conn *fc = get_fuse_conn(dir);
880 int err; 876 int err;
881 877
882 if (fc->no_tmpfile) 878 if (fc->no_tmpfile)
883 return -EOPNOTSUPP; 879 return -EOPNOTSUPP;
884 880
885 err = fuse_create_open(dir, file->f_pa 881 err = fuse_create_open(dir, file->f_path.dentry, file, file->f_flags, mode, FUSE_TMPFILE);
886 if (err == -ENOSYS) { 882 if (err == -ENOSYS) {
887 fc->no_tmpfile = 1; 883 fc->no_tmpfile = 1;
888 err = -EOPNOTSUPP; 884 err = -EOPNOTSUPP;
889 } 885 }
890 return err; 886 return err;
891 } 887 }
892 888
893 static int fuse_mkdir(struct mnt_idmap *idmap, 889 static int fuse_mkdir(struct mnt_idmap *idmap, struct inode *dir,
894 struct dentry *entry, um 890 struct dentry *entry, umode_t mode)
895 { 891 {
896 struct fuse_mkdir_in inarg; 892 struct fuse_mkdir_in inarg;
897 struct fuse_mount *fm = get_fuse_mount 893 struct fuse_mount *fm = get_fuse_mount(dir);
898 FUSE_ARGS(args); 894 FUSE_ARGS(args);
899 895
900 if (!fm->fc->dont_mask) 896 if (!fm->fc->dont_mask)
901 mode &= ~current_umask(); 897 mode &= ~current_umask();
902 898
903 memset(&inarg, 0, sizeof(inarg)); 899 memset(&inarg, 0, sizeof(inarg));
904 inarg.mode = mode; 900 inarg.mode = mode;
905 inarg.umask = current_umask(); 901 inarg.umask = current_umask();
906 args.opcode = FUSE_MKDIR; 902 args.opcode = FUSE_MKDIR;
907 args.in_numargs = 2; 903 args.in_numargs = 2;
908 args.in_args[0].size = sizeof(inarg); 904 args.in_args[0].size = sizeof(inarg);
909 args.in_args[0].value = &inarg; 905 args.in_args[0].value = &inarg;
910 args.in_args[1].size = entry->d_name.l 906 args.in_args[1].size = entry->d_name.len + 1;
911 args.in_args[1].value = entry->d_name. 907 args.in_args[1].value = entry->d_name.name;
912 return create_new_entry(fm, &args, dir 908 return create_new_entry(fm, &args, dir, entry, S_IFDIR);
913 } 909 }
914 910
915 static int fuse_symlink(struct mnt_idmap *idma 911 static int fuse_symlink(struct mnt_idmap *idmap, struct inode *dir,
916 struct dentry *entry, 912 struct dentry *entry, const char *link)
917 { 913 {
918 struct fuse_mount *fm = get_fuse_mount 914 struct fuse_mount *fm = get_fuse_mount(dir);
919 unsigned len = strlen(link) + 1; 915 unsigned len = strlen(link) + 1;
920 FUSE_ARGS(args); 916 FUSE_ARGS(args);
921 917
922 args.opcode = FUSE_SYMLINK; 918 args.opcode = FUSE_SYMLINK;
923 args.in_numargs = 2; 919 args.in_numargs = 2;
924 args.in_args[0].size = entry->d_name.l 920 args.in_args[0].size = entry->d_name.len + 1;
925 args.in_args[0].value = entry->d_name. 921 args.in_args[0].value = entry->d_name.name;
926 args.in_args[1].size = len; 922 args.in_args[1].size = len;
927 args.in_args[1].value = link; 923 args.in_args[1].value = link;
928 return create_new_entry(fm, &args, dir 924 return create_new_entry(fm, &args, dir, entry, S_IFLNK);
929 } 925 }
930 926
931 void fuse_flush_time_update(struct inode *inod 927 void fuse_flush_time_update(struct inode *inode)
932 { 928 {
933 int err = sync_inode_metadata(inode, 1 929 int err = sync_inode_metadata(inode, 1);
934 930
935 mapping_set_error(inode->i_mapping, er 931 mapping_set_error(inode->i_mapping, err);
936 } 932 }
937 933
938 static void fuse_update_ctime_in_cache(struct 934 static void fuse_update_ctime_in_cache(struct inode *inode)
939 { 935 {
940 if (!IS_NOCMTIME(inode)) { 936 if (!IS_NOCMTIME(inode)) {
941 inode_set_ctime_current(inode) 937 inode_set_ctime_current(inode);
942 mark_inode_dirty_sync(inode); 938 mark_inode_dirty_sync(inode);
943 fuse_flush_time_update(inode); 939 fuse_flush_time_update(inode);
944 } 940 }
945 } 941 }
946 942
947 void fuse_update_ctime(struct inode *inode) 943 void fuse_update_ctime(struct inode *inode)
948 { 944 {
949 fuse_invalidate_attr_mask(inode, STATX 945 fuse_invalidate_attr_mask(inode, STATX_CTIME);
950 fuse_update_ctime_in_cache(inode); 946 fuse_update_ctime_in_cache(inode);
951 } 947 }
952 948
953 static void fuse_entry_unlinked(struct dentry 949 static void fuse_entry_unlinked(struct dentry *entry)
954 { 950 {
955 struct inode *inode = d_inode(entry); 951 struct inode *inode = d_inode(entry);
956 struct fuse_conn *fc = get_fuse_conn(i 952 struct fuse_conn *fc = get_fuse_conn(inode);
957 struct fuse_inode *fi = get_fuse_inode 953 struct fuse_inode *fi = get_fuse_inode(inode);
958 954
959 spin_lock(&fi->lock); 955 spin_lock(&fi->lock);
960 fi->attr_version = atomic64_inc_return 956 fi->attr_version = atomic64_inc_return(&fc->attr_version);
961 /* 957 /*
962 * If i_nlink == 0 then unlink doesn't 958 * If i_nlink == 0 then unlink doesn't make sense, yet this can
963 * happen if userspace filesystem is c 959 * happen if userspace filesystem is careless. It would be
964 * difficult to enforce correct nlink 960 * difficult to enforce correct nlink usage so just ignore this
965 * condition here 961 * condition here
966 */ 962 */
967 if (S_ISDIR(inode->i_mode)) 963 if (S_ISDIR(inode->i_mode))
968 clear_nlink(inode); 964 clear_nlink(inode);
969 else if (inode->i_nlink > 0) 965 else if (inode->i_nlink > 0)
970 drop_nlink(inode); 966 drop_nlink(inode);
971 spin_unlock(&fi->lock); 967 spin_unlock(&fi->lock);
972 fuse_invalidate_entry_cache(entry); 968 fuse_invalidate_entry_cache(entry);
973 fuse_update_ctime(inode); 969 fuse_update_ctime(inode);
974 } 970 }
975 971
976 static int fuse_unlink(struct inode *dir, stru 972 static int fuse_unlink(struct inode *dir, struct dentry *entry)
977 { 973 {
978 int err; 974 int err;
979 struct fuse_mount *fm = get_fuse_mount 975 struct fuse_mount *fm = get_fuse_mount(dir);
980 FUSE_ARGS(args); 976 FUSE_ARGS(args);
981 977
982 if (fuse_is_bad(dir)) 978 if (fuse_is_bad(dir))
983 return -EIO; 979 return -EIO;
984 980
985 args.opcode = FUSE_UNLINK; 981 args.opcode = FUSE_UNLINK;
986 args.nodeid = get_node_id(dir); 982 args.nodeid = get_node_id(dir);
987 args.in_numargs = 1; 983 args.in_numargs = 1;
988 args.in_args[0].size = entry->d_name.l 984 args.in_args[0].size = entry->d_name.len + 1;
989 args.in_args[0].value = entry->d_name. 985 args.in_args[0].value = entry->d_name.name;
990 err = fuse_simple_request(fm, &args); 986 err = fuse_simple_request(fm, &args);
991 if (!err) { 987 if (!err) {
992 fuse_dir_changed(dir); 988 fuse_dir_changed(dir);
993 fuse_entry_unlinked(entry); 989 fuse_entry_unlinked(entry);
994 } else if (err == -EINTR || err == -EN 990 } else if (err == -EINTR || err == -ENOENT)
995 fuse_invalidate_entry(entry); 991 fuse_invalidate_entry(entry);
996 return err; 992 return err;
997 } 993 }
998 994
999 static int fuse_rmdir(struct inode *dir, struc 995 static int fuse_rmdir(struct inode *dir, struct dentry *entry)
1000 { 996 {
1001 int err; 997 int err;
1002 struct fuse_mount *fm = get_fuse_moun 998 struct fuse_mount *fm = get_fuse_mount(dir);
1003 FUSE_ARGS(args); 999 FUSE_ARGS(args);
1004 1000
1005 if (fuse_is_bad(dir)) 1001 if (fuse_is_bad(dir))
1006 return -EIO; 1002 return -EIO;
1007 1003
1008 args.opcode = FUSE_RMDIR; 1004 args.opcode = FUSE_RMDIR;
1009 args.nodeid = get_node_id(dir); 1005 args.nodeid = get_node_id(dir);
1010 args.in_numargs = 1; 1006 args.in_numargs = 1;
1011 args.in_args[0].size = entry->d_name. 1007 args.in_args[0].size = entry->d_name.len + 1;
1012 args.in_args[0].value = entry->d_name 1008 args.in_args[0].value = entry->d_name.name;
1013 err = fuse_simple_request(fm, &args); 1009 err = fuse_simple_request(fm, &args);
1014 if (!err) { 1010 if (!err) {
1015 fuse_dir_changed(dir); 1011 fuse_dir_changed(dir);
1016 fuse_entry_unlinked(entry); 1012 fuse_entry_unlinked(entry);
1017 } else if (err == -EINTR || err == -E 1013 } else if (err == -EINTR || err == -ENOENT)
1018 fuse_invalidate_entry(entry); 1014 fuse_invalidate_entry(entry);
1019 return err; 1015 return err;
1020 } 1016 }
1021 1017
1022 static int fuse_rename_common(struct inode *o 1018 static int fuse_rename_common(struct inode *olddir, struct dentry *oldent,
1023 struct inode *n 1019 struct inode *newdir, struct dentry *newent,
1024 unsigned int fl 1020 unsigned int flags, int opcode, size_t argsize)
1025 { 1021 {
1026 int err; 1022 int err;
1027 struct fuse_rename2_in inarg; 1023 struct fuse_rename2_in inarg;
1028 struct fuse_mount *fm = get_fuse_moun 1024 struct fuse_mount *fm = get_fuse_mount(olddir);
1029 FUSE_ARGS(args); 1025 FUSE_ARGS(args);
1030 1026
1031 memset(&inarg, 0, argsize); 1027 memset(&inarg, 0, argsize);
1032 inarg.newdir = get_node_id(newdir); 1028 inarg.newdir = get_node_id(newdir);
1033 inarg.flags = flags; 1029 inarg.flags = flags;
1034 args.opcode = opcode; 1030 args.opcode = opcode;
1035 args.nodeid = get_node_id(olddir); 1031 args.nodeid = get_node_id(olddir);
1036 args.in_numargs = 3; 1032 args.in_numargs = 3;
1037 args.in_args[0].size = argsize; 1033 args.in_args[0].size = argsize;
1038 args.in_args[0].value = &inarg; 1034 args.in_args[0].value = &inarg;
1039 args.in_args[1].size = oldent->d_name 1035 args.in_args[1].size = oldent->d_name.len + 1;
1040 args.in_args[1].value = oldent->d_nam 1036 args.in_args[1].value = oldent->d_name.name;
1041 args.in_args[2].size = newent->d_name 1037 args.in_args[2].size = newent->d_name.len + 1;
1042 args.in_args[2].value = newent->d_nam 1038 args.in_args[2].value = newent->d_name.name;
1043 err = fuse_simple_request(fm, &args); 1039 err = fuse_simple_request(fm, &args);
1044 if (!err) { 1040 if (!err) {
1045 /* ctime changes */ 1041 /* ctime changes */
1046 fuse_update_ctime(d_inode(old 1042 fuse_update_ctime(d_inode(oldent));
1047 1043
1048 if (flags & RENAME_EXCHANGE) 1044 if (flags & RENAME_EXCHANGE)
1049 fuse_update_ctime(d_i 1045 fuse_update_ctime(d_inode(newent));
1050 1046
1051 fuse_dir_changed(olddir); 1047 fuse_dir_changed(olddir);
1052 if (olddir != newdir) 1048 if (olddir != newdir)
1053 fuse_dir_changed(newd 1049 fuse_dir_changed(newdir);
1054 1050
1055 /* newent will end up negativ 1051 /* newent will end up negative */
1056 if (!(flags & RENAME_EXCHANGE 1052 if (!(flags & RENAME_EXCHANGE) && d_really_is_positive(newent))
1057 fuse_entry_unlinked(n 1053 fuse_entry_unlinked(newent);
1058 } else if (err == -EINTR || err == -E 1054 } else if (err == -EINTR || err == -ENOENT) {
1059 /* If request was interrupted 1055 /* If request was interrupted, DEITY only knows if the
1060 rename actually took place 1056 rename actually took place. If the invalidation
1061 fails (e.g. some process h 1057 fails (e.g. some process has CWD under the renamed
1062 directory), then there can 1058 directory), then there can be inconsistency between
1063 the dcache and the real fi 1059 the dcache and the real filesystem. Tough luck. */
1064 fuse_invalidate_entry(oldent) 1060 fuse_invalidate_entry(oldent);
1065 if (d_really_is_positive(newe 1061 if (d_really_is_positive(newent))
1066 fuse_invalidate_entry 1062 fuse_invalidate_entry(newent);
1067 } 1063 }
1068 1064
1069 return err; 1065 return err;
1070 } 1066 }
1071 1067
1072 static int fuse_rename2(struct mnt_idmap *idm 1068 static int fuse_rename2(struct mnt_idmap *idmap, struct inode *olddir,
1073 struct dentry *oldent 1069 struct dentry *oldent, struct inode *newdir,
1074 struct dentry *newent 1070 struct dentry *newent, unsigned int flags)
1075 { 1071 {
1076 struct fuse_conn *fc = get_fuse_conn( 1072 struct fuse_conn *fc = get_fuse_conn(olddir);
1077 int err; 1073 int err;
1078 1074
1079 if (fuse_is_bad(olddir)) 1075 if (fuse_is_bad(olddir))
1080 return -EIO; 1076 return -EIO;
1081 1077
1082 if (flags & ~(RENAME_NOREPLACE | RENA 1078 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1083 return -EINVAL; 1079 return -EINVAL;
1084 1080
1085 if (flags) { 1081 if (flags) {
1086 if (fc->no_rename2 || fc->min 1082 if (fc->no_rename2 || fc->minor < 23)
1087 return -EINVAL; 1083 return -EINVAL;
1088 1084
1089 err = fuse_rename_common(oldd 1085 err = fuse_rename_common(olddir, oldent, newdir, newent, flags,
1090 FUSE 1086 FUSE_RENAME2,
1091 size 1087 sizeof(struct fuse_rename2_in));
1092 if (err == -ENOSYS) { 1088 if (err == -ENOSYS) {
1093 fc->no_rename2 = 1; 1089 fc->no_rename2 = 1;
1094 err = -EINVAL; 1090 err = -EINVAL;
1095 } 1091 }
1096 } else { 1092 } else {
1097 err = fuse_rename_common(oldd 1093 err = fuse_rename_common(olddir, oldent, newdir, newent, 0,
1098 FUSE 1094 FUSE_RENAME,
1099 size 1095 sizeof(struct fuse_rename_in));
1100 } 1096 }
1101 1097
1102 return err; 1098 return err;
1103 } 1099 }
1104 1100
1105 static int fuse_link(struct dentry *entry, st 1101 static int fuse_link(struct dentry *entry, struct inode *newdir,
1106 struct dentry *newent) 1102 struct dentry *newent)
1107 { 1103 {
1108 int err; 1104 int err;
1109 struct fuse_link_in inarg; 1105 struct fuse_link_in inarg;
1110 struct inode *inode = d_inode(entry); 1106 struct inode *inode = d_inode(entry);
1111 struct fuse_mount *fm = get_fuse_moun 1107 struct fuse_mount *fm = get_fuse_mount(inode);
1112 FUSE_ARGS(args); 1108 FUSE_ARGS(args);
1113 1109
1114 memset(&inarg, 0, sizeof(inarg)); 1110 memset(&inarg, 0, sizeof(inarg));
1115 inarg.oldnodeid = get_node_id(inode); 1111 inarg.oldnodeid = get_node_id(inode);
1116 args.opcode = FUSE_LINK; 1112 args.opcode = FUSE_LINK;
1117 args.in_numargs = 2; 1113 args.in_numargs = 2;
1118 args.in_args[0].size = sizeof(inarg); 1114 args.in_args[0].size = sizeof(inarg);
1119 args.in_args[0].value = &inarg; 1115 args.in_args[0].value = &inarg;
1120 args.in_args[1].size = newent->d_name 1116 args.in_args[1].size = newent->d_name.len + 1;
1121 args.in_args[1].value = newent->d_nam 1117 args.in_args[1].value = newent->d_name.name;
1122 err = create_new_entry(fm, &args, new 1118 err = create_new_entry(fm, &args, newdir, newent, inode->i_mode);
1123 if (!err) 1119 if (!err)
1124 fuse_update_ctime_in_cache(in 1120 fuse_update_ctime_in_cache(inode);
1125 else if (err == -EINTR) 1121 else if (err == -EINTR)
1126 fuse_invalidate_attr(inode); 1122 fuse_invalidate_attr(inode);
1127 1123
1128 return err; 1124 return err;
1129 } 1125 }
1130 1126
1131 static void fuse_fillattr(struct inode *inode 1127 static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
1132 struct kstat *stat) 1128 struct kstat *stat)
1133 { 1129 {
1134 unsigned int blkbits; 1130 unsigned int blkbits;
1135 struct fuse_conn *fc = get_fuse_conn( 1131 struct fuse_conn *fc = get_fuse_conn(inode);
1136 1132
1137 stat->dev = inode->i_sb->s_dev; 1133 stat->dev = inode->i_sb->s_dev;
1138 stat->ino = attr->ino; 1134 stat->ino = attr->ino;
1139 stat->mode = (inode->i_mode & S_IFMT) 1135 stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
1140 stat->nlink = attr->nlink; 1136 stat->nlink = attr->nlink;
1141 stat->uid = make_kuid(fc->user_ns, at 1137 stat->uid = make_kuid(fc->user_ns, attr->uid);
1142 stat->gid = make_kgid(fc->user_ns, at 1138 stat->gid = make_kgid(fc->user_ns, attr->gid);
1143 stat->rdev = inode->i_rdev; 1139 stat->rdev = inode->i_rdev;
1144 stat->atime.tv_sec = attr->atime; 1140 stat->atime.tv_sec = attr->atime;
1145 stat->atime.tv_nsec = attr->atimensec 1141 stat->atime.tv_nsec = attr->atimensec;
1146 stat->mtime.tv_sec = attr->mtime; 1142 stat->mtime.tv_sec = attr->mtime;
1147 stat->mtime.tv_nsec = attr->mtimensec 1143 stat->mtime.tv_nsec = attr->mtimensec;
1148 stat->ctime.tv_sec = attr->ctime; 1144 stat->ctime.tv_sec = attr->ctime;
1149 stat->ctime.tv_nsec = attr->ctimensec 1145 stat->ctime.tv_nsec = attr->ctimensec;
1150 stat->size = attr->size; 1146 stat->size = attr->size;
1151 stat->blocks = attr->blocks; 1147 stat->blocks = attr->blocks;
1152 1148
1153 if (attr->blksize != 0) 1149 if (attr->blksize != 0)
1154 blkbits = ilog2(attr->blksize 1150 blkbits = ilog2(attr->blksize);
1155 else 1151 else
1156 blkbits = inode->i_sb->s_bloc 1152 blkbits = inode->i_sb->s_blocksize_bits;
1157 1153
1158 stat->blksize = 1 << blkbits; 1154 stat->blksize = 1 << blkbits;
1159 } 1155 }
1160 1156
1161 static void fuse_statx_to_attr(struct fuse_st 1157 static void fuse_statx_to_attr(struct fuse_statx *sx, struct fuse_attr *attr)
1162 { 1158 {
1163 memset(attr, 0, sizeof(*attr)); 1159 memset(attr, 0, sizeof(*attr));
1164 attr->ino = sx->ino; 1160 attr->ino = sx->ino;
1165 attr->size = sx->size; 1161 attr->size = sx->size;
1166 attr->blocks = sx->blocks; 1162 attr->blocks = sx->blocks;
1167 attr->atime = sx->atime.tv_sec; 1163 attr->atime = sx->atime.tv_sec;
1168 attr->mtime = sx->mtime.tv_sec; 1164 attr->mtime = sx->mtime.tv_sec;
1169 attr->ctime = sx->ctime.tv_sec; 1165 attr->ctime = sx->ctime.tv_sec;
1170 attr->atimensec = sx->atime.tv_nsec; 1166 attr->atimensec = sx->atime.tv_nsec;
1171 attr->mtimensec = sx->mtime.tv_nsec; 1167 attr->mtimensec = sx->mtime.tv_nsec;
1172 attr->ctimensec = sx->ctime.tv_nsec; 1168 attr->ctimensec = sx->ctime.tv_nsec;
1173 attr->mode = sx->mode; 1169 attr->mode = sx->mode;
1174 attr->nlink = sx->nlink; 1170 attr->nlink = sx->nlink;
1175 attr->uid = sx->uid; 1171 attr->uid = sx->uid;
1176 attr->gid = sx->gid; 1172 attr->gid = sx->gid;
1177 attr->rdev = new_encode_dev(MKDEV(sx- 1173 attr->rdev = new_encode_dev(MKDEV(sx->rdev_major, sx->rdev_minor));
1178 attr->blksize = sx->blksize; 1174 attr->blksize = sx->blksize;
1179 } 1175 }
1180 1176
1181 static int fuse_do_statx(struct inode *inode, 1177 static int fuse_do_statx(struct inode *inode, struct file *file,
1182 struct kstat *stat) 1178 struct kstat *stat)
1183 { 1179 {
1184 int err; 1180 int err;
1185 struct fuse_attr attr; 1181 struct fuse_attr attr;
1186 struct fuse_statx *sx; 1182 struct fuse_statx *sx;
1187 struct fuse_statx_in inarg; 1183 struct fuse_statx_in inarg;
1188 struct fuse_statx_out outarg; 1184 struct fuse_statx_out outarg;
1189 struct fuse_mount *fm = get_fuse_moun 1185 struct fuse_mount *fm = get_fuse_mount(inode);
1190 u64 attr_version = fuse_get_attr_vers 1186 u64 attr_version = fuse_get_attr_version(fm->fc);
1191 FUSE_ARGS(args); 1187 FUSE_ARGS(args);
1192 1188
1193 memset(&inarg, 0, sizeof(inarg)); 1189 memset(&inarg, 0, sizeof(inarg));
1194 memset(&outarg, 0, sizeof(outarg)); 1190 memset(&outarg, 0, sizeof(outarg));
1195 /* Directories have separate file-han 1191 /* Directories have separate file-handle space */
1196 if (file && S_ISREG(inode->i_mode)) { 1192 if (file && S_ISREG(inode->i_mode)) {
1197 struct fuse_file *ff = file-> 1193 struct fuse_file *ff = file->private_data;
1198 1194
1199 inarg.getattr_flags |= FUSE_G 1195 inarg.getattr_flags |= FUSE_GETATTR_FH;
1200 inarg.fh = ff->fh; 1196 inarg.fh = ff->fh;
1201 } 1197 }
1202 /* For now leave sync hints as the de 1198 /* For now leave sync hints as the default, request all stats. */
1203 inarg.sx_flags = 0; 1199 inarg.sx_flags = 0;
1204 inarg.sx_mask = STATX_BASIC_STATS | S 1200 inarg.sx_mask = STATX_BASIC_STATS | STATX_BTIME;
1205 args.opcode = FUSE_STATX; 1201 args.opcode = FUSE_STATX;
1206 args.nodeid = get_node_id(inode); 1202 args.nodeid = get_node_id(inode);
1207 args.in_numargs = 1; 1203 args.in_numargs = 1;
1208 args.in_args[0].size = sizeof(inarg); 1204 args.in_args[0].size = sizeof(inarg);
1209 args.in_args[0].value = &inarg; 1205 args.in_args[0].value = &inarg;
1210 args.out_numargs = 1; 1206 args.out_numargs = 1;
1211 args.out_args[0].size = sizeof(outarg 1207 args.out_args[0].size = sizeof(outarg);
1212 args.out_args[0].value = &outarg; 1208 args.out_args[0].value = &outarg;
1213 err = fuse_simple_request(fm, &args); 1209 err = fuse_simple_request(fm, &args);
1214 if (err) 1210 if (err)
1215 return err; 1211 return err;
1216 1212
1217 sx = &outarg.stat; 1213 sx = &outarg.stat;
1218 if (((sx->mask & STATX_SIZE) && !fuse 1214 if (((sx->mask & STATX_SIZE) && !fuse_valid_size(sx->size)) ||
1219 ((sx->mask & STATX_TYPE) && (!fus 1215 ((sx->mask & STATX_TYPE) && (!fuse_valid_type(sx->mode) ||
1220 inod 1216 inode_wrong_type(inode, sx->mode)))) {
1221 fuse_make_bad(inode); 1217 fuse_make_bad(inode);
1222 return -EIO; 1218 return -EIO;
1223 } 1219 }
1224 1220
1225 fuse_statx_to_attr(&outarg.stat, &att 1221 fuse_statx_to_attr(&outarg.stat, &attr);
1226 if ((sx->mask & STATX_BASIC_STATS) == 1222 if ((sx->mask & STATX_BASIC_STATS) == STATX_BASIC_STATS) {
1227 fuse_change_attributes(inode, 1223 fuse_change_attributes(inode, &attr, &outarg.stat,
1228 ATTR_T 1224 ATTR_TIMEOUT(&outarg), attr_version);
1229 } 1225 }
1230 1226
1231 if (stat) { 1227 if (stat) {
1232 stat->result_mask = sx->mask 1228 stat->result_mask = sx->mask & (STATX_BASIC_STATS | STATX_BTIME);
1233 stat->btime.tv_sec = sx->btim 1229 stat->btime.tv_sec = sx->btime.tv_sec;
1234 stat->btime.tv_nsec = min_t(u 1230 stat->btime.tv_nsec = min_t(u32, sx->btime.tv_nsec, NSEC_PER_SEC - 1);
1235 fuse_fillattr(inode, &attr, s 1231 fuse_fillattr(inode, &attr, stat);
1236 stat->result_mask |= STATX_TY 1232 stat->result_mask |= STATX_TYPE;
1237 } 1233 }
1238 1234
1239 return 0; 1235 return 0;
1240 } 1236 }
1241 1237
1242 static int fuse_do_getattr(struct inode *inod 1238 static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
1243 struct file *file) 1239 struct file *file)
1244 { 1240 {
1245 int err; 1241 int err;
1246 struct fuse_getattr_in inarg; 1242 struct fuse_getattr_in inarg;
1247 struct fuse_attr_out outarg; 1243 struct fuse_attr_out outarg;
1248 struct fuse_mount *fm = get_fuse_moun 1244 struct fuse_mount *fm = get_fuse_mount(inode);
1249 FUSE_ARGS(args); 1245 FUSE_ARGS(args);
1250 u64 attr_version; 1246 u64 attr_version;
1251 1247
1252 attr_version = fuse_get_attr_version( 1248 attr_version = fuse_get_attr_version(fm->fc);
1253 1249
1254 memset(&inarg, 0, sizeof(inarg)); 1250 memset(&inarg, 0, sizeof(inarg));
1255 memset(&outarg, 0, sizeof(outarg)); 1251 memset(&outarg, 0, sizeof(outarg));
1256 /* Directories have separate file-han 1252 /* Directories have separate file-handle space */
1257 if (file && S_ISREG(inode->i_mode)) { 1253 if (file && S_ISREG(inode->i_mode)) {
1258 struct fuse_file *ff = file-> 1254 struct fuse_file *ff = file->private_data;
1259 1255
1260 inarg.getattr_flags |= FUSE_G 1256 inarg.getattr_flags |= FUSE_GETATTR_FH;
1261 inarg.fh = ff->fh; 1257 inarg.fh = ff->fh;
1262 } 1258 }
1263 args.opcode = FUSE_GETATTR; 1259 args.opcode = FUSE_GETATTR;
1264 args.nodeid = get_node_id(inode); 1260 args.nodeid = get_node_id(inode);
1265 args.in_numargs = 1; 1261 args.in_numargs = 1;
1266 args.in_args[0].size = sizeof(inarg); 1262 args.in_args[0].size = sizeof(inarg);
1267 args.in_args[0].value = &inarg; 1263 args.in_args[0].value = &inarg;
1268 args.out_numargs = 1; 1264 args.out_numargs = 1;
1269 args.out_args[0].size = sizeof(outarg 1265 args.out_args[0].size = sizeof(outarg);
1270 args.out_args[0].value = &outarg; 1266 args.out_args[0].value = &outarg;
1271 err = fuse_simple_request(fm, &args); 1267 err = fuse_simple_request(fm, &args);
1272 if (!err) { 1268 if (!err) {
1273 if (fuse_invalid_attr(&outarg 1269 if (fuse_invalid_attr(&outarg.attr) ||
1274 inode_wrong_type(inode, o 1270 inode_wrong_type(inode, outarg.attr.mode)) {
1275 fuse_make_bad(inode); 1271 fuse_make_bad(inode);
1276 err = -EIO; 1272 err = -EIO;
1277 } else { 1273 } else {
1278 fuse_change_attribute 1274 fuse_change_attributes(inode, &outarg.attr, NULL,
1279 1275 ATTR_TIMEOUT(&outarg),
1280 1276 attr_version);
1281 if (stat) 1277 if (stat)
1282 fuse_fillattr 1278 fuse_fillattr(inode, &outarg.attr, stat);
1283 } 1279 }
1284 } 1280 }
1285 return err; 1281 return err;
1286 } 1282 }
1287 1283
1288 static int fuse_update_get_attr(struct inode 1284 static int fuse_update_get_attr(struct inode *inode, struct file *file,
1289 struct kstat 1285 struct kstat *stat, u32 request_mask,
1290 unsigned int 1286 unsigned int flags)
1291 { 1287 {
1292 struct fuse_inode *fi = get_fuse_inod 1288 struct fuse_inode *fi = get_fuse_inode(inode);
1293 struct fuse_conn *fc = get_fuse_conn( 1289 struct fuse_conn *fc = get_fuse_conn(inode);
1294 int err = 0; 1290 int err = 0;
1295 bool sync; 1291 bool sync;
1296 u32 inval_mask = READ_ONCE(fi->inval_ 1292 u32 inval_mask = READ_ONCE(fi->inval_mask);
1297 u32 cache_mask = fuse_get_cache_mask( 1293 u32 cache_mask = fuse_get_cache_mask(inode);
1298 1294
1299 1295
1300 /* FUSE only supports basic stats and 1296 /* FUSE only supports basic stats and possibly btime */
1301 request_mask &= STATX_BASIC_STATS | S 1297 request_mask &= STATX_BASIC_STATS | STATX_BTIME;
1302 retry: 1298 retry:
1303 if (fc->no_statx) 1299 if (fc->no_statx)
1304 request_mask &= STATX_BASIC_S 1300 request_mask &= STATX_BASIC_STATS;
1305 1301
1306 if (!request_mask) 1302 if (!request_mask)
1307 sync = false; 1303 sync = false;
1308 else if (flags & AT_STATX_FORCE_SYNC) 1304 else if (flags & AT_STATX_FORCE_SYNC)
1309 sync = true; 1305 sync = true;
1310 else if (flags & AT_STATX_DONT_SYNC) 1306 else if (flags & AT_STATX_DONT_SYNC)
1311 sync = false; 1307 sync = false;
1312 else if (request_mask & inval_mask & 1308 else if (request_mask & inval_mask & ~cache_mask)
1313 sync = true; 1309 sync = true;
1314 else 1310 else
1315 sync = time_before64(fi->i_ti 1311 sync = time_before64(fi->i_time, get_jiffies_64());
1316 1312
1317 if (sync) { 1313 if (sync) {
1318 forget_all_cached_acls(inode) 1314 forget_all_cached_acls(inode);
1319 /* Try statx if BTIME is requ 1315 /* Try statx if BTIME is requested */
1320 if (!fc->no_statx && (request 1316 if (!fc->no_statx && (request_mask & ~STATX_BASIC_STATS)) {
1321 err = fuse_do_statx(i 1317 err = fuse_do_statx(inode, file, stat);
1322 if (err == -ENOSYS) { 1318 if (err == -ENOSYS) {
1323 fc->no_statx 1319 fc->no_statx = 1;
1324 err = 0; <<
1325 goto retry; 1320 goto retry;
1326 } 1321 }
1327 } else { 1322 } else {
1328 err = fuse_do_getattr 1323 err = fuse_do_getattr(inode, stat, file);
1329 } 1324 }
1330 } else if (stat) { 1325 } else if (stat) {
1331 generic_fillattr(&nop_mnt_idm 1326 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
1332 stat->mode = fi->orig_i_mode; 1327 stat->mode = fi->orig_i_mode;
1333 stat->ino = fi->orig_ino; 1328 stat->ino = fi->orig_ino;
1334 if (test_bit(FUSE_I_BTIME, &f 1329 if (test_bit(FUSE_I_BTIME, &fi->state)) {
1335 stat->btime = fi->i_b 1330 stat->btime = fi->i_btime;
1336 stat->result_mask |= 1331 stat->result_mask |= STATX_BTIME;
1337 } 1332 }
1338 } 1333 }
1339 1334
1340 return err; 1335 return err;
1341 } 1336 }
1342 1337
1343 int fuse_update_attributes(struct inode *inod 1338 int fuse_update_attributes(struct inode *inode, struct file *file, u32 mask)
1344 { 1339 {
1345 return fuse_update_get_attr(inode, fi 1340 return fuse_update_get_attr(inode, file, NULL, mask, 0);
1346 } 1341 }
1347 1342
1348 int fuse_reverse_inval_entry(struct fuse_conn 1343 int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid,
1349 u64 child_nodeid 1344 u64 child_nodeid, struct qstr *name, u32 flags)
1350 { 1345 {
1351 int err = -ENOTDIR; 1346 int err = -ENOTDIR;
1352 struct inode *parent; 1347 struct inode *parent;
1353 struct dentry *dir; 1348 struct dentry *dir;
1354 struct dentry *entry; 1349 struct dentry *entry;
1355 1350
1356 parent = fuse_ilookup(fc, parent_node 1351 parent = fuse_ilookup(fc, parent_nodeid, NULL);
1357 if (!parent) 1352 if (!parent)
1358 return -ENOENT; 1353 return -ENOENT;
1359 1354
1360 inode_lock_nested(parent, I_MUTEX_PAR 1355 inode_lock_nested(parent, I_MUTEX_PARENT);
1361 if (!S_ISDIR(parent->i_mode)) 1356 if (!S_ISDIR(parent->i_mode))
1362 goto unlock; 1357 goto unlock;
1363 1358
1364 err = -ENOENT; 1359 err = -ENOENT;
1365 dir = d_find_alias(parent); 1360 dir = d_find_alias(parent);
1366 if (!dir) 1361 if (!dir)
1367 goto unlock; 1362 goto unlock;
1368 1363
1369 name->hash = full_name_hash(dir, name 1364 name->hash = full_name_hash(dir, name->name, name->len);
1370 entry = d_lookup(dir, name); 1365 entry = d_lookup(dir, name);
1371 dput(dir); 1366 dput(dir);
1372 if (!entry) 1367 if (!entry)
1373 goto unlock; 1368 goto unlock;
1374 1369
1375 fuse_dir_changed(parent); 1370 fuse_dir_changed(parent);
1376 if (!(flags & FUSE_EXPIRE_ONLY)) 1371 if (!(flags & FUSE_EXPIRE_ONLY))
1377 d_invalidate(entry); 1372 d_invalidate(entry);
1378 fuse_invalidate_entry_cache(entry); 1373 fuse_invalidate_entry_cache(entry);
1379 1374
1380 if (child_nodeid != 0 && d_really_is_ 1375 if (child_nodeid != 0 && d_really_is_positive(entry)) {
1381 inode_lock(d_inode(entry)); 1376 inode_lock(d_inode(entry));
1382 if (get_node_id(d_inode(entry 1377 if (get_node_id(d_inode(entry)) != child_nodeid) {
1383 err = -ENOENT; 1378 err = -ENOENT;
1384 goto badentry; 1379 goto badentry;
1385 } 1380 }
1386 if (d_mountpoint(entry)) { 1381 if (d_mountpoint(entry)) {
1387 err = -EBUSY; 1382 err = -EBUSY;
1388 goto badentry; 1383 goto badentry;
1389 } 1384 }
1390 if (d_is_dir(entry)) { 1385 if (d_is_dir(entry)) {
1391 shrink_dcache_parent( 1386 shrink_dcache_parent(entry);
1392 if (!simple_empty(ent 1387 if (!simple_empty(entry)) {
1393 err = -ENOTEM 1388 err = -ENOTEMPTY;
1394 goto badentry 1389 goto badentry;
1395 } 1390 }
1396 d_inode(entry)->i_fla 1391 d_inode(entry)->i_flags |= S_DEAD;
1397 } 1392 }
1398 dont_mount(entry); 1393 dont_mount(entry);
1399 clear_nlink(d_inode(entry)); 1394 clear_nlink(d_inode(entry));
1400 err = 0; 1395 err = 0;
1401 badentry: 1396 badentry:
1402 inode_unlock(d_inode(entry)); 1397 inode_unlock(d_inode(entry));
1403 if (!err) 1398 if (!err)
1404 d_delete(entry); 1399 d_delete(entry);
1405 } else { 1400 } else {
1406 err = 0; 1401 err = 0;
1407 } 1402 }
1408 dput(entry); 1403 dput(entry);
1409 1404
1410 unlock: 1405 unlock:
1411 inode_unlock(parent); 1406 inode_unlock(parent);
1412 iput(parent); 1407 iput(parent);
1413 return err; 1408 return err;
1414 } 1409 }
1415 1410
1416 static inline bool fuse_permissible_uidgid(st 1411 static inline bool fuse_permissible_uidgid(struct fuse_conn *fc)
1417 { 1412 {
1418 const struct cred *cred = current_cre 1413 const struct cred *cred = current_cred();
1419 1414
1420 return (uid_eq(cred->euid, fc->user_i 1415 return (uid_eq(cred->euid, fc->user_id) &&
1421 uid_eq(cred->suid, fc->user_i 1416 uid_eq(cred->suid, fc->user_id) &&
1422 uid_eq(cred->uid, fc->user_i 1417 uid_eq(cred->uid, fc->user_id) &&
1423 gid_eq(cred->egid, fc->group_ 1418 gid_eq(cred->egid, fc->group_id) &&
1424 gid_eq(cred->sgid, fc->group_ 1419 gid_eq(cred->sgid, fc->group_id) &&
1425 gid_eq(cred->gid, fc->group_ 1420 gid_eq(cred->gid, fc->group_id));
1426 } 1421 }
1427 1422
1428 /* 1423 /*
1429 * Calling into a user-controlled filesystem 1424 * Calling into a user-controlled filesystem gives the filesystem
1430 * daemon ptrace-like capabilities over the c 1425 * daemon ptrace-like capabilities over the current process. This
1431 * means, that the filesystem daemon is able 1426 * means, that the filesystem daemon is able to record the exact
1432 * filesystem operations performed, and can a 1427 * filesystem operations performed, and can also control the behavior
1433 * of the requester process in otherwise impo 1428 * of the requester process in otherwise impossible ways. For example
1434 * it can delay the operation for arbitrary l 1429 * it can delay the operation for arbitrary length of time allowing
1435 * DoS against the requester. 1430 * DoS against the requester.
1436 * 1431 *
1437 * For this reason only those processes can c 1432 * For this reason only those processes can call into the filesystem,
1438 * for which the owner of the mount has ptrac 1433 * for which the owner of the mount has ptrace privilege. This
1439 * excludes processes started by other users, 1434 * excludes processes started by other users, suid or sgid processes.
1440 */ 1435 */
1441 bool fuse_allow_current_process(struct fuse_c 1436 bool fuse_allow_current_process(struct fuse_conn *fc)
1442 { 1437 {
1443 bool allow; 1438 bool allow;
1444 1439
1445 if (fc->allow_other) 1440 if (fc->allow_other)
1446 allow = current_in_userns(fc- 1441 allow = current_in_userns(fc->user_ns);
1447 else 1442 else
1448 allow = fuse_permissible_uidg 1443 allow = fuse_permissible_uidgid(fc);
1449 1444
1450 if (!allow && allow_sys_admin_access 1445 if (!allow && allow_sys_admin_access && capable(CAP_SYS_ADMIN))
1451 allow = true; 1446 allow = true;
1452 1447
1453 return allow; 1448 return allow;
1454 } 1449 }
1455 1450
1456 static int fuse_access(struct inode *inode, i 1451 static int fuse_access(struct inode *inode, int mask)
1457 { 1452 {
1458 struct fuse_mount *fm = get_fuse_moun 1453 struct fuse_mount *fm = get_fuse_mount(inode);
1459 FUSE_ARGS(args); 1454 FUSE_ARGS(args);
1460 struct fuse_access_in inarg; 1455 struct fuse_access_in inarg;
1461 int err; 1456 int err;
1462 1457
1463 BUG_ON(mask & MAY_NOT_BLOCK); 1458 BUG_ON(mask & MAY_NOT_BLOCK);
1464 1459
1465 if (fm->fc->no_access) 1460 if (fm->fc->no_access)
1466 return 0; 1461 return 0;
1467 1462
1468 memset(&inarg, 0, sizeof(inarg)); 1463 memset(&inarg, 0, sizeof(inarg));
1469 inarg.mask = mask & (MAY_READ | MAY_W 1464 inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
1470 args.opcode = FUSE_ACCESS; 1465 args.opcode = FUSE_ACCESS;
1471 args.nodeid = get_node_id(inode); 1466 args.nodeid = get_node_id(inode);
1472 args.in_numargs = 1; 1467 args.in_numargs = 1;
1473 args.in_args[0].size = sizeof(inarg); 1468 args.in_args[0].size = sizeof(inarg);
1474 args.in_args[0].value = &inarg; 1469 args.in_args[0].value = &inarg;
1475 err = fuse_simple_request(fm, &args); 1470 err = fuse_simple_request(fm, &args);
1476 if (err == -ENOSYS) { 1471 if (err == -ENOSYS) {
1477 fm->fc->no_access = 1; 1472 fm->fc->no_access = 1;
1478 err = 0; 1473 err = 0;
1479 } 1474 }
1480 return err; 1475 return err;
1481 } 1476 }
1482 1477
1483 static int fuse_perm_getattr(struct inode *in 1478 static int fuse_perm_getattr(struct inode *inode, int mask)
1484 { 1479 {
1485 if (mask & MAY_NOT_BLOCK) 1480 if (mask & MAY_NOT_BLOCK)
1486 return -ECHILD; 1481 return -ECHILD;
1487 1482
1488 forget_all_cached_acls(inode); 1483 forget_all_cached_acls(inode);
1489 return fuse_do_getattr(inode, NULL, N 1484 return fuse_do_getattr(inode, NULL, NULL);
1490 } 1485 }
1491 1486
1492 /* 1487 /*
1493 * Check permission. The two basic access mo 1488 * Check permission. The two basic access models of FUSE are:
1494 * 1489 *
1495 * 1) Local access checking ('default_permiss 1490 * 1) Local access checking ('default_permissions' mount option) based
1496 * on file mode. This is the plain old disk 1491 * on file mode. This is the plain old disk filesystem permission
1497 * model. !! 1492 * modell.
1498 * 1493 *
1499 * 2) "Remote" access checking, where server 1494 * 2) "Remote" access checking, where server is responsible for
1500 * checking permission in each inode operatio 1495 * checking permission in each inode operation. An exception to this
1501 * is if ->permission() was invoked from sys_ 1496 * is if ->permission() was invoked from sys_access() in which case an
1502 * access request is sent. Execute permissio 1497 * access request is sent. Execute permission is still checked
1503 * locally based on file mode. 1498 * locally based on file mode.
1504 */ 1499 */
1505 static int fuse_permission(struct mnt_idmap * 1500 static int fuse_permission(struct mnt_idmap *idmap,
1506 struct inode *inod 1501 struct inode *inode, int mask)
1507 { 1502 {
1508 struct fuse_conn *fc = get_fuse_conn( 1503 struct fuse_conn *fc = get_fuse_conn(inode);
1509 bool refreshed = false; 1504 bool refreshed = false;
1510 int err = 0; 1505 int err = 0;
1511 1506
1512 if (fuse_is_bad(inode)) 1507 if (fuse_is_bad(inode))
1513 return -EIO; 1508 return -EIO;
1514 1509
1515 if (!fuse_allow_current_process(fc)) 1510 if (!fuse_allow_current_process(fc))
1516 return -EACCES; 1511 return -EACCES;
1517 1512
1518 /* 1513 /*
1519 * If attributes are needed, refresh 1514 * If attributes are needed, refresh them before proceeding
1520 */ 1515 */
1521 if (fc->default_permissions || 1516 if (fc->default_permissions ||
1522 ((mask & MAY_EXEC) && S_ISREG(ino 1517 ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
1523 struct fuse_inode *fi = get_f 1518 struct fuse_inode *fi = get_fuse_inode(inode);
1524 u32 perm_mask = STATX_MODE | 1519 u32 perm_mask = STATX_MODE | STATX_UID | STATX_GID;
1525 1520
1526 if (perm_mask & READ_ONCE(fi- 1521 if (perm_mask & READ_ONCE(fi->inval_mask) ||
1527 time_before64(fi->i_time, 1522 time_before64(fi->i_time, get_jiffies_64())) {
1528 refreshed = true; 1523 refreshed = true;
1529 1524
1530 err = fuse_perm_getat 1525 err = fuse_perm_getattr(inode, mask);
1531 if (err) 1526 if (err)
1532 return err; 1527 return err;
1533 } 1528 }
1534 } 1529 }
1535 1530
1536 if (fc->default_permissions) { 1531 if (fc->default_permissions) {
1537 err = generic_permission(&nop 1532 err = generic_permission(&nop_mnt_idmap, inode, mask);
1538 1533
1539 /* If permission is denied, t 1534 /* If permission is denied, try to refresh file
1540 attributes. This is also 1535 attributes. This is also needed, because the root
1541 node will at first have no 1536 node will at first have no permissions */
1542 if (err == -EACCES && !refres 1537 if (err == -EACCES && !refreshed) {
1543 err = fuse_perm_getat 1538 err = fuse_perm_getattr(inode, mask);
1544 if (!err) 1539 if (!err)
1545 err = generic 1540 err = generic_permission(&nop_mnt_idmap,
1546 1541 inode, mask);
1547 } 1542 }
1548 1543
1549 /* Note: the opposite of the 1544 /* Note: the opposite of the above test does not
1550 exist. So if permissions 1545 exist. So if permissions are revoked this won't be
1551 noticed immediately, only 1546 noticed immediately, only after the attribute
1552 timeout has expired */ 1547 timeout has expired */
1553 } else if (mask & (MAY_ACCESS | MAY_C 1548 } else if (mask & (MAY_ACCESS | MAY_CHDIR)) {
1554 err = fuse_access(inode, mask 1549 err = fuse_access(inode, mask);
1555 } else if ((mask & MAY_EXEC) && S_ISR 1550 } else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
1556 if (!(inode->i_mode & S_IXUGO 1551 if (!(inode->i_mode & S_IXUGO)) {
1557 if (refreshed) 1552 if (refreshed)
1558 return -EACCE 1553 return -EACCES;
1559 1554
1560 err = fuse_perm_getat 1555 err = fuse_perm_getattr(inode, mask);
1561 if (!err && !(inode-> 1556 if (!err && !(inode->i_mode & S_IXUGO))
1562 return -EACCE 1557 return -EACCES;
1563 } 1558 }
1564 } 1559 }
1565 return err; 1560 return err;
1566 } 1561 }
1567 1562
1568 static int fuse_readlink_page(struct inode *i 1563 static int fuse_readlink_page(struct inode *inode, struct page *page)
1569 { 1564 {
1570 struct fuse_mount *fm = get_fuse_moun 1565 struct fuse_mount *fm = get_fuse_mount(inode);
1571 struct fuse_page_desc desc = { .lengt 1566 struct fuse_page_desc desc = { .length = PAGE_SIZE - 1 };
1572 struct fuse_args_pages ap = { 1567 struct fuse_args_pages ap = {
1573 .num_pages = 1, 1568 .num_pages = 1,
1574 .pages = &page, 1569 .pages = &page,
1575 .descs = &desc, 1570 .descs = &desc,
1576 }; 1571 };
1577 char *link; 1572 char *link;
1578 ssize_t res; 1573 ssize_t res;
1579 1574
1580 ap.args.opcode = FUSE_READLINK; 1575 ap.args.opcode = FUSE_READLINK;
1581 ap.args.nodeid = get_node_id(inode); 1576 ap.args.nodeid = get_node_id(inode);
1582 ap.args.out_pages = true; 1577 ap.args.out_pages = true;
1583 ap.args.out_argvar = true; 1578 ap.args.out_argvar = true;
1584 ap.args.page_zeroing = true; 1579 ap.args.page_zeroing = true;
1585 ap.args.out_numargs = 1; 1580 ap.args.out_numargs = 1;
1586 ap.args.out_args[0].size = desc.lengt 1581 ap.args.out_args[0].size = desc.length;
1587 res = fuse_simple_request(fm, &ap.arg 1582 res = fuse_simple_request(fm, &ap.args);
1588 1583
1589 fuse_invalidate_atime(inode); 1584 fuse_invalidate_atime(inode);
1590 1585
1591 if (res < 0) 1586 if (res < 0)
1592 return res; 1587 return res;
1593 1588
1594 if (WARN_ON(res >= PAGE_SIZE)) 1589 if (WARN_ON(res >= PAGE_SIZE))
1595 return -EIO; 1590 return -EIO;
1596 1591
1597 link = page_address(page); 1592 link = page_address(page);
1598 link[res] = '\0'; 1593 link[res] = '\0';
1599 1594
1600 return 0; 1595 return 0;
1601 } 1596 }
1602 1597
1603 static const char *fuse_get_link(struct dentr 1598 static const char *fuse_get_link(struct dentry *dentry, struct inode *inode,
1604 struct delay 1599 struct delayed_call *callback)
1605 { 1600 {
1606 struct fuse_conn *fc = get_fuse_conn( 1601 struct fuse_conn *fc = get_fuse_conn(inode);
1607 struct page *page; 1602 struct page *page;
1608 int err; 1603 int err;
1609 1604
1610 err = -EIO; 1605 err = -EIO;
1611 if (fuse_is_bad(inode)) 1606 if (fuse_is_bad(inode))
1612 goto out_err; 1607 goto out_err;
1613 1608
1614 if (fc->cache_symlinks) 1609 if (fc->cache_symlinks)
1615 return page_get_link(dentry, 1610 return page_get_link(dentry, inode, callback);
1616 1611
1617 err = -ECHILD; 1612 err = -ECHILD;
1618 if (!dentry) 1613 if (!dentry)
1619 goto out_err; 1614 goto out_err;
1620 1615
1621 page = alloc_page(GFP_KERNEL); 1616 page = alloc_page(GFP_KERNEL);
1622 err = -ENOMEM; 1617 err = -ENOMEM;
1623 if (!page) 1618 if (!page)
1624 goto out_err; 1619 goto out_err;
1625 1620
1626 err = fuse_readlink_page(inode, page) 1621 err = fuse_readlink_page(inode, page);
1627 if (err) { 1622 if (err) {
1628 __free_page(page); 1623 __free_page(page);
1629 goto out_err; 1624 goto out_err;
1630 } 1625 }
1631 1626
1632 set_delayed_call(callback, page_put_l 1627 set_delayed_call(callback, page_put_link, page);
1633 1628
1634 return page_address(page); 1629 return page_address(page);
1635 1630
1636 out_err: 1631 out_err:
1637 return ERR_PTR(err); 1632 return ERR_PTR(err);
1638 } 1633 }
1639 1634
1640 static int fuse_dir_open(struct inode *inode, 1635 static int fuse_dir_open(struct inode *inode, struct file *file)
1641 { 1636 {
1642 struct fuse_mount *fm = get_fuse_moun !! 1637 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 } 1638 }
1667 1639
1668 static int fuse_dir_release(struct inode *ino 1640 static int fuse_dir_release(struct inode *inode, struct file *file)
1669 { 1641 {
1670 fuse_release_common(file, true); 1642 fuse_release_common(file, true);
1671 1643
1672 return 0; 1644 return 0;
1673 } 1645 }
1674 1646
1675 static int fuse_dir_fsync(struct file *file, 1647 static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end,
1676 int datasync) 1648 int datasync)
1677 { 1649 {
1678 struct inode *inode = file->f_mapping 1650 struct inode *inode = file->f_mapping->host;
1679 struct fuse_conn *fc = get_fuse_conn( 1651 struct fuse_conn *fc = get_fuse_conn(inode);
1680 int err; 1652 int err;
1681 1653
1682 if (fuse_is_bad(inode)) 1654 if (fuse_is_bad(inode))
1683 return -EIO; 1655 return -EIO;
1684 1656
1685 if (fc->no_fsyncdir) 1657 if (fc->no_fsyncdir)
1686 return 0; 1658 return 0;
1687 1659
1688 inode_lock(inode); 1660 inode_lock(inode);
1689 err = fuse_fsync_common(file, start, 1661 err = fuse_fsync_common(file, start, end, datasync, FUSE_FSYNCDIR);
1690 if (err == -ENOSYS) { 1662 if (err == -ENOSYS) {
1691 fc->no_fsyncdir = 1; 1663 fc->no_fsyncdir = 1;
1692 err = 0; 1664 err = 0;
1693 } 1665 }
1694 inode_unlock(inode); 1666 inode_unlock(inode);
1695 1667
1696 return err; 1668 return err;
1697 } 1669 }
1698 1670
1699 static long fuse_dir_ioctl(struct file *file, 1671 static long fuse_dir_ioctl(struct file *file, unsigned int cmd,
1700 unsigned long arg 1672 unsigned long arg)
1701 { 1673 {
1702 struct fuse_conn *fc = get_fuse_conn( 1674 struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
1703 1675
1704 /* FUSE_IOCTL_DIR only supported for 1676 /* FUSE_IOCTL_DIR only supported for API version >= 7.18 */
1705 if (fc->minor < 18) 1677 if (fc->minor < 18)
1706 return -ENOTTY; 1678 return -ENOTTY;
1707 1679
1708 return fuse_ioctl_common(file, cmd, a 1680 return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_DIR);
1709 } 1681 }
1710 1682
1711 static long fuse_dir_compat_ioctl(struct file 1683 static long fuse_dir_compat_ioctl(struct file *file, unsigned int cmd,
1712 unsigned l 1684 unsigned long arg)
1713 { 1685 {
1714 struct fuse_conn *fc = get_fuse_conn( 1686 struct fuse_conn *fc = get_fuse_conn(file->f_mapping->host);
1715 1687
1716 if (fc->minor < 18) 1688 if (fc->minor < 18)
1717 return -ENOTTY; 1689 return -ENOTTY;
1718 1690
1719 return fuse_ioctl_common(file, cmd, a 1691 return fuse_ioctl_common(file, cmd, arg,
1720 FUSE_IOCTL_C 1692 FUSE_IOCTL_COMPAT | FUSE_IOCTL_DIR);
1721 } 1693 }
1722 1694
1723 static bool update_mtime(unsigned ivalid, boo 1695 static bool update_mtime(unsigned ivalid, bool trust_local_mtime)
1724 { 1696 {
1725 /* Always update if mtime is explicit 1697 /* Always update if mtime is explicitly set */
1726 if (ivalid & ATTR_MTIME_SET) 1698 if (ivalid & ATTR_MTIME_SET)
1727 return true; 1699 return true;
1728 1700
1729 /* Or if kernel i_mtime is the offici 1701 /* Or if kernel i_mtime is the official one */
1730 if (trust_local_mtime) 1702 if (trust_local_mtime)
1731 return true; 1703 return true;
1732 1704
1733 /* If it's an open(O_TRUNC) or an ftr 1705 /* If it's an open(O_TRUNC) or an ftruncate(), don't update */
1734 if ((ivalid & ATTR_SIZE) && (ivalid & 1706 if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
1735 return false; 1707 return false;
1736 1708
1737 /* In all other cases update */ 1709 /* In all other cases update */
1738 return true; 1710 return true;
1739 } 1711 }
1740 1712
1741 static void iattr_to_fattr(struct fuse_conn * 1713 static void iattr_to_fattr(struct fuse_conn *fc, struct iattr *iattr,
1742 struct fuse_setatt 1714 struct fuse_setattr_in *arg, bool trust_local_cmtime)
1743 { 1715 {
1744 unsigned ivalid = iattr->ia_valid; 1716 unsigned ivalid = iattr->ia_valid;
1745 1717
1746 if (ivalid & ATTR_MODE) 1718 if (ivalid & ATTR_MODE)
1747 arg->valid |= FATTR_MODE, a 1719 arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
1748 if (ivalid & ATTR_UID) 1720 if (ivalid & ATTR_UID)
1749 arg->valid |= FATTR_UID, a 1721 arg->valid |= FATTR_UID, arg->uid = from_kuid(fc->user_ns, iattr->ia_uid);
1750 if (ivalid & ATTR_GID) 1722 if (ivalid & ATTR_GID)
1751 arg->valid |= FATTR_GID, a 1723 arg->valid |= FATTR_GID, arg->gid = from_kgid(fc->user_ns, iattr->ia_gid);
1752 if (ivalid & ATTR_SIZE) 1724 if (ivalid & ATTR_SIZE)
1753 arg->valid |= FATTR_SIZE, a 1725 arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
1754 if (ivalid & ATTR_ATIME) { 1726 if (ivalid & ATTR_ATIME) {
1755 arg->valid |= FATTR_ATIME; 1727 arg->valid |= FATTR_ATIME;
1756 arg->atime = iattr->ia_atime. 1728 arg->atime = iattr->ia_atime.tv_sec;
1757 arg->atimensec = iattr->ia_at 1729 arg->atimensec = iattr->ia_atime.tv_nsec;
1758 if (!(ivalid & ATTR_ATIME_SET 1730 if (!(ivalid & ATTR_ATIME_SET))
1759 arg->valid |= FATTR_A 1731 arg->valid |= FATTR_ATIME_NOW;
1760 } 1732 }
1761 if ((ivalid & ATTR_MTIME) && update_m 1733 if ((ivalid & ATTR_MTIME) && update_mtime(ivalid, trust_local_cmtime)) {
1762 arg->valid |= FATTR_MTIME; 1734 arg->valid |= FATTR_MTIME;
1763 arg->mtime = iattr->ia_mtime. 1735 arg->mtime = iattr->ia_mtime.tv_sec;
1764 arg->mtimensec = iattr->ia_mt 1736 arg->mtimensec = iattr->ia_mtime.tv_nsec;
1765 if (!(ivalid & ATTR_MTIME_SET 1737 if (!(ivalid & ATTR_MTIME_SET) && !trust_local_cmtime)
1766 arg->valid |= FATTR_M 1738 arg->valid |= FATTR_MTIME_NOW;
1767 } 1739 }
1768 if ((ivalid & ATTR_CTIME) && trust_lo 1740 if ((ivalid & ATTR_CTIME) && trust_local_cmtime) {
1769 arg->valid |= FATTR_CTIME; 1741 arg->valid |= FATTR_CTIME;
1770 arg->ctime = iattr->ia_ctime. 1742 arg->ctime = iattr->ia_ctime.tv_sec;
1771 arg->ctimensec = iattr->ia_ct 1743 arg->ctimensec = iattr->ia_ctime.tv_nsec;
1772 } 1744 }
1773 } 1745 }
1774 1746
1775 /* 1747 /*
1776 * Prevent concurrent writepages on inode 1748 * Prevent concurrent writepages on inode
1777 * 1749 *
1778 * This is done by adding a negative bias to 1750 * This is done by adding a negative bias to the inode write counter
1779 * and waiting for all pending writes to fini 1751 * and waiting for all pending writes to finish.
1780 */ 1752 */
1781 void fuse_set_nowrite(struct inode *inode) 1753 void fuse_set_nowrite(struct inode *inode)
1782 { 1754 {
1783 struct fuse_inode *fi = get_fuse_inod 1755 struct fuse_inode *fi = get_fuse_inode(inode);
1784 1756
1785 BUG_ON(!inode_is_locked(inode)); 1757 BUG_ON(!inode_is_locked(inode));
1786 1758
1787 spin_lock(&fi->lock); 1759 spin_lock(&fi->lock);
1788 BUG_ON(fi->writectr < 0); 1760 BUG_ON(fi->writectr < 0);
1789 fi->writectr += FUSE_NOWRITE; 1761 fi->writectr += FUSE_NOWRITE;
1790 spin_unlock(&fi->lock); 1762 spin_unlock(&fi->lock);
1791 wait_event(fi->page_waitq, fi->writec 1763 wait_event(fi->page_waitq, fi->writectr == FUSE_NOWRITE);
1792 } 1764 }
1793 1765
1794 /* 1766 /*
1795 * Allow writepages on inode 1767 * Allow writepages on inode
1796 * 1768 *
1797 * Remove the bias from the writecounter and 1769 * Remove the bias from the writecounter and send any queued
1798 * writepages. 1770 * writepages.
1799 */ 1771 */
1800 static void __fuse_release_nowrite(struct ino 1772 static void __fuse_release_nowrite(struct inode *inode)
1801 { 1773 {
1802 struct fuse_inode *fi = get_fuse_inod 1774 struct fuse_inode *fi = get_fuse_inode(inode);
1803 1775
1804 BUG_ON(fi->writectr != FUSE_NOWRITE); 1776 BUG_ON(fi->writectr != FUSE_NOWRITE);
1805 fi->writectr = 0; 1777 fi->writectr = 0;
1806 fuse_flush_writepages(inode); 1778 fuse_flush_writepages(inode);
1807 } 1779 }
1808 1780
1809 void fuse_release_nowrite(struct inode *inode 1781 void fuse_release_nowrite(struct inode *inode)
1810 { 1782 {
1811 struct fuse_inode *fi = get_fuse_inod 1783 struct fuse_inode *fi = get_fuse_inode(inode);
1812 1784
1813 spin_lock(&fi->lock); 1785 spin_lock(&fi->lock);
1814 __fuse_release_nowrite(inode); 1786 __fuse_release_nowrite(inode);
1815 spin_unlock(&fi->lock); 1787 spin_unlock(&fi->lock);
1816 } 1788 }
1817 1789
1818 static void fuse_setattr_fill(struct fuse_con 1790 static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_args *args,
1819 struct inode *i 1791 struct inode *inode,
1820 struct fuse_set 1792 struct fuse_setattr_in *inarg_p,
1821 struct fuse_att 1793 struct fuse_attr_out *outarg_p)
1822 { 1794 {
1823 args->opcode = FUSE_SETATTR; 1795 args->opcode = FUSE_SETATTR;
1824 args->nodeid = get_node_id(inode); 1796 args->nodeid = get_node_id(inode);
1825 args->in_numargs = 1; 1797 args->in_numargs = 1;
1826 args->in_args[0].size = sizeof(*inarg 1798 args->in_args[0].size = sizeof(*inarg_p);
1827 args->in_args[0].value = inarg_p; 1799 args->in_args[0].value = inarg_p;
1828 args->out_numargs = 1; 1800 args->out_numargs = 1;
1829 args->out_args[0].size = sizeof(*outa 1801 args->out_args[0].size = sizeof(*outarg_p);
1830 args->out_args[0].value = outarg_p; 1802 args->out_args[0].value = outarg_p;
1831 } 1803 }
1832 1804
1833 /* 1805 /*
1834 * Flush inode->i_mtime to the server 1806 * Flush inode->i_mtime to the server
1835 */ 1807 */
1836 int fuse_flush_times(struct inode *inode, str 1808 int fuse_flush_times(struct inode *inode, struct fuse_file *ff)
1837 { 1809 {
1838 struct fuse_mount *fm = get_fuse_moun 1810 struct fuse_mount *fm = get_fuse_mount(inode);
1839 FUSE_ARGS(args); 1811 FUSE_ARGS(args);
1840 struct fuse_setattr_in inarg; 1812 struct fuse_setattr_in inarg;
1841 struct fuse_attr_out outarg; 1813 struct fuse_attr_out outarg;
1842 1814
1843 memset(&inarg, 0, sizeof(inarg)); 1815 memset(&inarg, 0, sizeof(inarg));
1844 memset(&outarg, 0, sizeof(outarg)); 1816 memset(&outarg, 0, sizeof(outarg));
1845 1817
1846 inarg.valid = FATTR_MTIME; 1818 inarg.valid = FATTR_MTIME;
1847 inarg.mtime = inode_get_mtime_sec(ino 1819 inarg.mtime = inode_get_mtime_sec(inode);
1848 inarg.mtimensec = inode_get_mtime_nse 1820 inarg.mtimensec = inode_get_mtime_nsec(inode);
1849 if (fm->fc->minor >= 23) { 1821 if (fm->fc->minor >= 23) {
1850 inarg.valid |= FATTR_CTIME; 1822 inarg.valid |= FATTR_CTIME;
1851 inarg.ctime = inode_get_ctime 1823 inarg.ctime = inode_get_ctime_sec(inode);
1852 inarg.ctimensec = inode_get_c 1824 inarg.ctimensec = inode_get_ctime_nsec(inode);
1853 } 1825 }
1854 if (ff) { 1826 if (ff) {
1855 inarg.valid |= FATTR_FH; 1827 inarg.valid |= FATTR_FH;
1856 inarg.fh = ff->fh; 1828 inarg.fh = ff->fh;
1857 } 1829 }
1858 fuse_setattr_fill(fm->fc, &args, inod 1830 fuse_setattr_fill(fm->fc, &args, inode, &inarg, &outarg);
1859 1831
1860 return fuse_simple_request(fm, &args) 1832 return fuse_simple_request(fm, &args);
1861 } 1833 }
1862 1834
1863 /* 1835 /*
1864 * Set attributes, and at the same time refre 1836 * Set attributes, and at the same time refresh them.
1865 * 1837 *
1866 * Truncation is slightly complicated, becaus 1838 * Truncation is slightly complicated, because the 'truncate' request
1867 * may fail, in which case we don't want to t 1839 * may fail, in which case we don't want to touch the mapping.
1868 * vmtruncate() doesn't allow for this case, 1840 * vmtruncate() doesn't allow for this case, so do the rlimit checking
1869 * and the actual truncation by hand. 1841 * and the actual truncation by hand.
1870 */ 1842 */
1871 int fuse_do_setattr(struct dentry *dentry, st 1843 int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
1872 struct file *file) 1844 struct file *file)
1873 { 1845 {
1874 struct inode *inode = d_inode(dentry) 1846 struct inode *inode = d_inode(dentry);
1875 struct fuse_mount *fm = get_fuse_moun 1847 struct fuse_mount *fm = get_fuse_mount(inode);
1876 struct fuse_conn *fc = fm->fc; 1848 struct fuse_conn *fc = fm->fc;
1877 struct fuse_inode *fi = get_fuse_inod 1849 struct fuse_inode *fi = get_fuse_inode(inode);
1878 struct address_space *mapping = inode 1850 struct address_space *mapping = inode->i_mapping;
1879 FUSE_ARGS(args); 1851 FUSE_ARGS(args);
1880 struct fuse_setattr_in inarg; 1852 struct fuse_setattr_in inarg;
1881 struct fuse_attr_out outarg; 1853 struct fuse_attr_out outarg;
1882 bool is_truncate = false; 1854 bool is_truncate = false;
1883 bool is_wb = fc->writeback_cache && S 1855 bool is_wb = fc->writeback_cache && S_ISREG(inode->i_mode);
1884 loff_t oldsize; 1856 loff_t oldsize;
1885 int err; 1857 int err;
1886 bool trust_local_cmtime = is_wb; 1858 bool trust_local_cmtime = is_wb;
1887 bool fault_blocked = false; 1859 bool fault_blocked = false;
1888 1860
1889 if (!fc->default_permissions) 1861 if (!fc->default_permissions)
1890 attr->ia_valid |= ATTR_FORCE; 1862 attr->ia_valid |= ATTR_FORCE;
1891 1863
1892 err = setattr_prepare(&nop_mnt_idmap, 1864 err = setattr_prepare(&nop_mnt_idmap, dentry, attr);
1893 if (err) 1865 if (err)
1894 return err; 1866 return err;
1895 1867
1896 if (attr->ia_valid & ATTR_SIZE) { 1868 if (attr->ia_valid & ATTR_SIZE) {
1897 if (WARN_ON(!S_ISREG(inode->i 1869 if (WARN_ON(!S_ISREG(inode->i_mode)))
1898 return -EIO; 1870 return -EIO;
1899 is_truncate = true; 1871 is_truncate = true;
1900 } 1872 }
1901 1873
1902 if (FUSE_IS_DAX(inode) && is_truncate 1874 if (FUSE_IS_DAX(inode) && is_truncate) {
1903 filemap_invalidate_lock(mappi 1875 filemap_invalidate_lock(mapping);
1904 fault_blocked = true; 1876 fault_blocked = true;
1905 err = fuse_dax_break_layouts( 1877 err = fuse_dax_break_layouts(inode, 0, 0);
1906 if (err) { 1878 if (err) {
1907 filemap_invalidate_un 1879 filemap_invalidate_unlock(mapping);
1908 return err; 1880 return err;
1909 } 1881 }
1910 } 1882 }
1911 1883
1912 if (attr->ia_valid & ATTR_OPEN) { 1884 if (attr->ia_valid & ATTR_OPEN) {
1913 /* This is coming from open(. 1885 /* This is coming from open(..., ... | O_TRUNC); */
1914 WARN_ON(!(attr->ia_valid & AT 1886 WARN_ON(!(attr->ia_valid & ATTR_SIZE));
1915 WARN_ON(attr->ia_size != 0); 1887 WARN_ON(attr->ia_size != 0);
1916 if (fc->atomic_o_trunc) { 1888 if (fc->atomic_o_trunc) {
1917 /* 1889 /*
1918 * No need to send re 1890 * No need to send request to userspace, since actual
1919 * truncation has alr 1891 * truncation has already been done by OPEN. But still
1920 * need to truncate p 1892 * need to truncate page cache.
1921 */ 1893 */
1922 i_size_write(inode, 0 1894 i_size_write(inode, 0);
1923 truncate_pagecache(in 1895 truncate_pagecache(inode, 0);
1924 goto out; 1896 goto out;
1925 } 1897 }
1926 file = NULL; 1898 file = NULL;
1927 } 1899 }
1928 1900
1929 /* Flush dirty data/metadata before n 1901 /* Flush dirty data/metadata before non-truncate SETATTR */
1930 if (is_wb && 1902 if (is_wb &&
1931 attr->ia_valid & 1903 attr->ia_valid &
1932 (ATTR_MODE | ATTR_UID 1904 (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_MTIME_SET |
1933 ATTR_TIMES_SET)) { 1905 ATTR_TIMES_SET)) {
1934 err = write_inode_now(inode, 1906 err = write_inode_now(inode, true);
1935 if (err) 1907 if (err)
1936 return err; 1908 return err;
1937 1909
1938 fuse_set_nowrite(inode); 1910 fuse_set_nowrite(inode);
1939 fuse_release_nowrite(inode); 1911 fuse_release_nowrite(inode);
1940 } 1912 }
1941 1913
1942 if (is_truncate) { 1914 if (is_truncate) {
1943 fuse_set_nowrite(inode); 1915 fuse_set_nowrite(inode);
1944 set_bit(FUSE_I_SIZE_UNSTABLE, 1916 set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
1945 if (trust_local_cmtime && att 1917 if (trust_local_cmtime && attr->ia_size != inode->i_size)
1946 attr->ia_valid |= ATT 1918 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1947 } 1919 }
1948 1920
1949 memset(&inarg, 0, sizeof(inarg)); 1921 memset(&inarg, 0, sizeof(inarg));
1950 memset(&outarg, 0, sizeof(outarg)); 1922 memset(&outarg, 0, sizeof(outarg));
1951 iattr_to_fattr(fc, attr, &inarg, trus 1923 iattr_to_fattr(fc, attr, &inarg, trust_local_cmtime);
1952 if (file) { 1924 if (file) {
1953 struct fuse_file *ff = file-> 1925 struct fuse_file *ff = file->private_data;
1954 inarg.valid |= FATTR_FH; 1926 inarg.valid |= FATTR_FH;
1955 inarg.fh = ff->fh; 1927 inarg.fh = ff->fh;
1956 } 1928 }
1957 1929
1958 /* Kill suid/sgid for non-directory c 1930 /* Kill suid/sgid for non-directory chown unconditionally */
1959 if (fc->handle_killpriv_v2 && !S_ISDI 1931 if (fc->handle_killpriv_v2 && !S_ISDIR(inode->i_mode) &&
1960 attr->ia_valid & (ATTR_UID | ATTR 1932 attr->ia_valid & (ATTR_UID | ATTR_GID))
1961 inarg.valid |= FATTR_KILL_SUI 1933 inarg.valid |= FATTR_KILL_SUIDGID;
1962 1934
1963 if (attr->ia_valid & ATTR_SIZE) { 1935 if (attr->ia_valid & ATTR_SIZE) {
1964 /* For mandatory locking in t 1936 /* For mandatory locking in truncate */
1965 inarg.valid |= FATTR_LOCKOWNE 1937 inarg.valid |= FATTR_LOCKOWNER;
1966 inarg.lock_owner = fuse_lock_ 1938 inarg.lock_owner = fuse_lock_owner_id(fc, current->files);
1967 1939
1968 /* Kill suid/sgid for truncat 1940 /* Kill suid/sgid for truncate only if no CAP_FSETID */
1969 if (fc->handle_killpriv_v2 && 1941 if (fc->handle_killpriv_v2 && !capable(CAP_FSETID))
1970 inarg.valid |= FATTR_ 1942 inarg.valid |= FATTR_KILL_SUIDGID;
1971 } 1943 }
1972 fuse_setattr_fill(fc, &args, inode, & 1944 fuse_setattr_fill(fc, &args, inode, &inarg, &outarg);
1973 err = fuse_simple_request(fm, &args); 1945 err = fuse_simple_request(fm, &args);
1974 if (err) { 1946 if (err) {
1975 if (err == -EINTR) 1947 if (err == -EINTR)
1976 fuse_invalidate_attr( 1948 fuse_invalidate_attr(inode);
1977 goto error; 1949 goto error;
1978 } 1950 }
1979 1951
1980 if (fuse_invalid_attr(&outarg.attr) | 1952 if (fuse_invalid_attr(&outarg.attr) ||
1981 inode_wrong_type(inode, outarg.at 1953 inode_wrong_type(inode, outarg.attr.mode)) {
1982 fuse_make_bad(inode); 1954 fuse_make_bad(inode);
1983 err = -EIO; 1955 err = -EIO;
1984 goto error; 1956 goto error;
1985 } 1957 }
1986 1958
1987 spin_lock(&fi->lock); 1959 spin_lock(&fi->lock);
1988 /* the kernel maintains i_mtime local 1960 /* the kernel maintains i_mtime locally */
1989 if (trust_local_cmtime) { 1961 if (trust_local_cmtime) {
1990 if (attr->ia_valid & ATTR_MTI 1962 if (attr->ia_valid & ATTR_MTIME)
1991 inode_set_mtime_to_ts 1963 inode_set_mtime_to_ts(inode, attr->ia_mtime);
1992 if (attr->ia_valid & ATTR_CTI 1964 if (attr->ia_valid & ATTR_CTIME)
1993 inode_set_ctime_to_ts 1965 inode_set_ctime_to_ts(inode, attr->ia_ctime);
1994 /* FIXME: clear I_DIRTY_SYNC? 1966 /* FIXME: clear I_DIRTY_SYNC? */
1995 } 1967 }
1996 1968
1997 fuse_change_attributes_common(inode, 1969 fuse_change_attributes_common(inode, &outarg.attr, NULL,
1998 ATTR_TI 1970 ATTR_TIMEOUT(&outarg),
1999 fuse_ge 1971 fuse_get_cache_mask(inode));
2000 oldsize = inode->i_size; 1972 oldsize = inode->i_size;
2001 /* see the comment in fuse_change_att 1973 /* see the comment in fuse_change_attributes() */
2002 if (!is_wb || is_truncate) 1974 if (!is_wb || is_truncate)
2003 i_size_write(inode, outarg.at 1975 i_size_write(inode, outarg.attr.size);
2004 1976
2005 if (is_truncate) { 1977 if (is_truncate) {
2006 /* NOTE: this may release/rea 1978 /* NOTE: this may release/reacquire fi->lock */
2007 __fuse_release_nowrite(inode) 1979 __fuse_release_nowrite(inode);
2008 } 1980 }
2009 spin_unlock(&fi->lock); 1981 spin_unlock(&fi->lock);
2010 1982
2011 /* 1983 /*
2012 * Only call invalidate_inode_pages2( 1984 * Only call invalidate_inode_pages2() after removing
2013 * FUSE_NOWRITE, otherwise fuse_laund 1985 * FUSE_NOWRITE, otherwise fuse_launder_folio() would deadlock.
2014 */ 1986 */
2015 if ((is_truncate || !is_wb) && 1987 if ((is_truncate || !is_wb) &&
2016 S_ISREG(inode->i_mode) && oldsize 1988 S_ISREG(inode->i_mode) && oldsize != outarg.attr.size) {
2017 truncate_pagecache(inode, out 1989 truncate_pagecache(inode, outarg.attr.size);
2018 invalidate_inode_pages2(mappi 1990 invalidate_inode_pages2(mapping);
2019 } 1991 }
2020 1992
2021 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi-> 1993 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
2022 out: 1994 out:
2023 if (fault_blocked) 1995 if (fault_blocked)
2024 filemap_invalidate_unlock(map 1996 filemap_invalidate_unlock(mapping);
2025 1997
2026 return 0; 1998 return 0;
2027 1999
2028 error: 2000 error:
2029 if (is_truncate) 2001 if (is_truncate)
2030 fuse_release_nowrite(inode); 2002 fuse_release_nowrite(inode);
2031 2003
2032 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi-> 2004 clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
2033 2005
2034 if (fault_blocked) 2006 if (fault_blocked)
2035 filemap_invalidate_unlock(map 2007 filemap_invalidate_unlock(mapping);
2036 return err; 2008 return err;
2037 } 2009 }
2038 2010
2039 static int fuse_setattr(struct mnt_idmap *idm 2011 static int fuse_setattr(struct mnt_idmap *idmap, struct dentry *entry,
2040 struct iattr *attr) 2012 struct iattr *attr)
2041 { 2013 {
2042 struct inode *inode = d_inode(entry); 2014 struct inode *inode = d_inode(entry);
2043 struct fuse_conn *fc = get_fuse_conn( 2015 struct fuse_conn *fc = get_fuse_conn(inode);
2044 struct file *file = (attr->ia_valid & 2016 struct file *file = (attr->ia_valid & ATTR_FILE) ? attr->ia_file : NULL;
2045 int ret; 2017 int ret;
2046 2018
2047 if (fuse_is_bad(inode)) 2019 if (fuse_is_bad(inode))
2048 return -EIO; 2020 return -EIO;
2049 2021
2050 if (!fuse_allow_current_process(get_f 2022 if (!fuse_allow_current_process(get_fuse_conn(inode)))
2051 return -EACCES; 2023 return -EACCES;
2052 2024
2053 if (attr->ia_valid & (ATTR_KILL_SUID 2025 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) {
2054 attr->ia_valid &= ~(ATTR_KILL 2026 attr->ia_valid &= ~(ATTR_KILL_SUID | ATTR_KILL_SGID |
2055 ATTR_MODE 2027 ATTR_MODE);
2056 2028
2057 /* 2029 /*
2058 * The only sane way to relia 2030 * The only sane way to reliably kill suid/sgid is to do it in
2059 * the userspace filesystem 2031 * the userspace filesystem
2060 * 2032 *
2061 * This should be done on wri 2033 * This should be done on write(), truncate() and chown().
2062 */ 2034 */
2063 if (!fc->handle_killpriv && ! 2035 if (!fc->handle_killpriv && !fc->handle_killpriv_v2) {
2064 /* 2036 /*
2065 * ia_mode calculatio 2037 * ia_mode calculation may have used stale i_mode.
2066 * Refresh and recalc 2038 * Refresh and recalculate.
2067 */ 2039 */
2068 ret = fuse_do_getattr 2040 ret = fuse_do_getattr(inode, NULL, file);
2069 if (ret) 2041 if (ret)
2070 return ret; 2042 return ret;
2071 2043
2072 attr->ia_mode = inode 2044 attr->ia_mode = inode->i_mode;
2073 if (inode->i_mode & S 2045 if (inode->i_mode & S_ISUID) {
2074 attr->ia_vali 2046 attr->ia_valid |= ATTR_MODE;
2075 attr->ia_mode 2047 attr->ia_mode &= ~S_ISUID;
2076 } 2048 }
2077 if ((inode->i_mode & 2049 if ((inode->i_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
2078 attr->ia_vali 2050 attr->ia_valid |= ATTR_MODE;
2079 attr->ia_mode 2051 attr->ia_mode &= ~S_ISGID;
2080 } 2052 }
2081 } 2053 }
2082 } 2054 }
2083 if (!attr->ia_valid) 2055 if (!attr->ia_valid)
2084 return 0; 2056 return 0;
2085 2057
2086 ret = fuse_do_setattr(entry, attr, fi 2058 ret = fuse_do_setattr(entry, attr, file);
2087 if (!ret) { 2059 if (!ret) {
2088 /* 2060 /*
2089 * If filesystem supports acl 2061 * If filesystem supports acls it may have updated acl xattrs in
2090 * the filesystem, so forget 2062 * the filesystem, so forget cached acls for the inode.
2091 */ 2063 */
2092 if (fc->posix_acl) 2064 if (fc->posix_acl)
2093 forget_all_cached_acl 2065 forget_all_cached_acls(inode);
2094 2066
2095 /* Directory mode changed, ma 2067 /* Directory mode changed, may need to revalidate access */
2096 if (d_is_dir(entry) && (attr- 2068 if (d_is_dir(entry) && (attr->ia_valid & ATTR_MODE))
2097 fuse_invalidate_entry 2069 fuse_invalidate_entry_cache(entry);
2098 } 2070 }
2099 return ret; 2071 return ret;
2100 } 2072 }
2101 2073
2102 static int fuse_getattr(struct mnt_idmap *idm 2074 static int fuse_getattr(struct mnt_idmap *idmap,
2103 const struct path *pa 2075 const struct path *path, struct kstat *stat,
2104 u32 request_mask, uns 2076 u32 request_mask, unsigned int flags)
2105 { 2077 {
2106 struct inode *inode = d_inode(path->d 2078 struct inode *inode = d_inode(path->dentry);
2107 struct fuse_conn *fc = get_fuse_conn( 2079 struct fuse_conn *fc = get_fuse_conn(inode);
2108 2080
2109 if (fuse_is_bad(inode)) 2081 if (fuse_is_bad(inode))
2110 return -EIO; 2082 return -EIO;
2111 2083
2112 if (!fuse_allow_current_process(fc)) 2084 if (!fuse_allow_current_process(fc)) {
2113 if (!request_mask) { 2085 if (!request_mask) {
2114 /* 2086 /*
2115 * If user explicitly 2087 * If user explicitly requested *nothing* then don't
2116 * error out, but ret 2088 * error out, but return st_dev only.
2117 */ 2089 */
2118 stat->result_mask = 0 2090 stat->result_mask = 0;
2119 stat->dev = inode->i_ 2091 stat->dev = inode->i_sb->s_dev;
2120 return 0; 2092 return 0;
2121 } 2093 }
2122 return -EACCES; 2094 return -EACCES;
2123 } 2095 }
2124 2096
2125 return fuse_update_get_attr(inode, NU 2097 return fuse_update_get_attr(inode, NULL, stat, request_mask, flags);
2126 } 2098 }
2127 2099
2128 static const struct inode_operations fuse_dir 2100 static const struct inode_operations fuse_dir_inode_operations = {
2129 .lookup = fuse_lookup, 2101 .lookup = fuse_lookup,
2130 .mkdir = fuse_mkdir, 2102 .mkdir = fuse_mkdir,
2131 .symlink = fuse_symlink, 2103 .symlink = fuse_symlink,
2132 .unlink = fuse_unlink, 2104 .unlink = fuse_unlink,
2133 .rmdir = fuse_rmdir, 2105 .rmdir = fuse_rmdir,
2134 .rename = fuse_rename2, 2106 .rename = fuse_rename2,
2135 .link = fuse_link, 2107 .link = fuse_link,
2136 .setattr = fuse_setattr, 2108 .setattr = fuse_setattr,
2137 .create = fuse_create, 2109 .create = fuse_create,
2138 .atomic_open = fuse_atomic_open, 2110 .atomic_open = fuse_atomic_open,
2139 .tmpfile = fuse_tmpfile, 2111 .tmpfile = fuse_tmpfile,
2140 .mknod = fuse_mknod, 2112 .mknod = fuse_mknod,
2141 .permission = fuse_permission, 2113 .permission = fuse_permission,
2142 .getattr = fuse_getattr, 2114 .getattr = fuse_getattr,
2143 .listxattr = fuse_listxattr, 2115 .listxattr = fuse_listxattr,
2144 .get_inode_acl = fuse_get_inode_acl, 2116 .get_inode_acl = fuse_get_inode_acl,
2145 .get_acl = fuse_get_acl, 2117 .get_acl = fuse_get_acl,
2146 .set_acl = fuse_set_acl, 2118 .set_acl = fuse_set_acl,
2147 .fileattr_get = fuse_fileattr_get, 2119 .fileattr_get = fuse_fileattr_get,
2148 .fileattr_set = fuse_fileattr_set, 2120 .fileattr_set = fuse_fileattr_set,
2149 }; 2121 };
2150 2122
2151 static const struct file_operations fuse_dir_ 2123 static const struct file_operations fuse_dir_operations = {
2152 .llseek = generic_file_llseek 2124 .llseek = generic_file_llseek,
2153 .read = generic_read_dir, 2125 .read = generic_read_dir,
2154 .iterate_shared = fuse_readdir, 2126 .iterate_shared = fuse_readdir,
2155 .open = fuse_dir_open, 2127 .open = fuse_dir_open,
2156 .release = fuse_dir_release, 2128 .release = fuse_dir_release,
2157 .fsync = fuse_dir_fsync, 2129 .fsync = fuse_dir_fsync,
2158 .unlocked_ioctl = fuse_dir_ioctl, 2130 .unlocked_ioctl = fuse_dir_ioctl,
2159 .compat_ioctl = fuse_dir_compat_ioc 2131 .compat_ioctl = fuse_dir_compat_ioctl,
2160 }; 2132 };
2161 2133
2162 static const struct inode_operations fuse_com 2134 static const struct inode_operations fuse_common_inode_operations = {
2163 .setattr = fuse_setattr, 2135 .setattr = fuse_setattr,
2164 .permission = fuse_permission, 2136 .permission = fuse_permission,
2165 .getattr = fuse_getattr, 2137 .getattr = fuse_getattr,
2166 .listxattr = fuse_listxattr, 2138 .listxattr = fuse_listxattr,
2167 .get_inode_acl = fuse_get_inode_acl, 2139 .get_inode_acl = fuse_get_inode_acl,
2168 .get_acl = fuse_get_acl, 2140 .get_acl = fuse_get_acl,
2169 .set_acl = fuse_set_acl, 2141 .set_acl = fuse_set_acl,
2170 .fileattr_get = fuse_fileattr_get, 2142 .fileattr_get = fuse_fileattr_get,
2171 .fileattr_set = fuse_fileattr_set, 2143 .fileattr_set = fuse_fileattr_set,
2172 }; 2144 };
2173 2145
2174 static const struct inode_operations fuse_sym 2146 static const struct inode_operations fuse_symlink_inode_operations = {
2175 .setattr = fuse_setattr, 2147 .setattr = fuse_setattr,
2176 .get_link = fuse_get_link, 2148 .get_link = fuse_get_link,
2177 .getattr = fuse_getattr, 2149 .getattr = fuse_getattr,
2178 .listxattr = fuse_listxattr, 2150 .listxattr = fuse_listxattr,
2179 }; 2151 };
2180 2152
2181 void fuse_init_common(struct inode *inode) 2153 void fuse_init_common(struct inode *inode)
2182 { 2154 {
2183 inode->i_op = &fuse_common_inode_oper 2155 inode->i_op = &fuse_common_inode_operations;
2184 } 2156 }
2185 2157
2186 void fuse_init_dir(struct inode *inode) 2158 void fuse_init_dir(struct inode *inode)
2187 { 2159 {
2188 struct fuse_inode *fi = get_fuse_inod 2160 struct fuse_inode *fi = get_fuse_inode(inode);
2189 2161
2190 inode->i_op = &fuse_dir_inode_operati 2162 inode->i_op = &fuse_dir_inode_operations;
2191 inode->i_fop = &fuse_dir_operations; 2163 inode->i_fop = &fuse_dir_operations;
2192 2164
2193 spin_lock_init(&fi->rdc.lock); 2165 spin_lock_init(&fi->rdc.lock);
2194 fi->rdc.cached = false; 2166 fi->rdc.cached = false;
2195 fi->rdc.size = 0; 2167 fi->rdc.size = 0;
2196 fi->rdc.pos = 0; 2168 fi->rdc.pos = 0;
2197 fi->rdc.version = 0; 2169 fi->rdc.version = 0;
2198 } 2170 }
2199 2171
2200 static int fuse_symlink_read_folio(struct fil 2172 static int fuse_symlink_read_folio(struct file *null, struct folio *folio)
2201 { 2173 {
2202 int err = fuse_readlink_page(folio->m 2174 int err = fuse_readlink_page(folio->mapping->host, &folio->page);
2203 2175
2204 if (!err) 2176 if (!err)
2205 folio_mark_uptodate(folio); 2177 folio_mark_uptodate(folio);
2206 2178
2207 folio_unlock(folio); 2179 folio_unlock(folio);
2208 2180
2209 return err; 2181 return err;
2210 } 2182 }
2211 2183
2212 static const struct address_space_operations 2184 static const struct address_space_operations fuse_symlink_aops = {
2213 .read_folio = fuse_symlink_read_f 2185 .read_folio = fuse_symlink_read_folio,
2214 }; 2186 };
2215 2187
2216 void fuse_init_symlink(struct inode *inode) 2188 void fuse_init_symlink(struct inode *inode)
2217 { 2189 {
2218 inode->i_op = &fuse_symlink_inode_ope 2190 inode->i_op = &fuse_symlink_inode_operations;
2219 inode->i_data.a_ops = &fuse_symlink_a 2191 inode->i_data.a_ops = &fuse_symlink_aops;
2220 inode_nohighmem(inode); 2192 inode_nohighmem(inode);
2221 } 2193 }
2222 2194
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