Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/proc/inode.c | |
4 | * | |
5 | * Copyright (C) 1991, 1992 Linus Torvalds | |
6 | */ | |
7 | ||
efb1a57d | 8 | #include <linux/cache.h> |
1da177e4 LT |
9 | #include <linux/time.h> |
10 | #include <linux/proc_fs.h> | |
11 | #include <linux/kernel.h> | |
97412950 | 12 | #include <linux/pid_namespace.h> |
1da177e4 LT |
13 | #include <linux/mm.h> |
14 | #include <linux/string.h> | |
15 | #include <linux/stat.h> | |
786d7e16 | 16 | #include <linux/completion.h> |
dd23aae4 | 17 | #include <linux/poll.h> |
87ebdc00 | 18 | #include <linux/printk.h> |
1da177e4 LT |
19 | #include <linux/file.h> |
20 | #include <linux/limits.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
9043476f | 23 | #include <linux/sysctl.h> |
97412950 | 24 | #include <linux/seq_file.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
97412950 | 26 | #include <linux/mount.h> |
1da177e4 | 27 | |
7c0f6ba6 | 28 | #include <linux/uaccess.h> |
1da177e4 | 29 | |
fee781e6 | 30 | #include "internal.h" |
1da177e4 | 31 | |
8267952b | 32 | static void proc_evict_inode(struct inode *inode) |
1da177e4 LT |
33 | { |
34 | struct proc_dir_entry *de; | |
dfef6dcd | 35 | struct ctl_table_header *head; |
1da177e4 | 36 | |
91b0abe3 | 37 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 38 | clear_inode(inode); |
fef26658 | 39 | |
99f89551 | 40 | /* Stop tracking associated processes */ |
13b41b09 | 41 | put_pid(PROC_I(inode)->pid); |
1da177e4 LT |
42 | |
43 | /* Let go of any associated proc directory entry */ | |
6bee55f9 | 44 | de = PDE(inode); |
99b76233 | 45 | if (de) |
135d5655 | 46 | pde_put(de); |
d6cffbbe | 47 | |
dfef6dcd AV |
48 | head = PROC_I(inode)->sysctl; |
49 | if (head) { | |
1c44dbc8 | 50 | RCU_INIT_POINTER(PROC_I(inode)->sysctl, NULL); |
d6cffbbe | 51 | proc_sys_evict_inode(inode, head); |
dfef6dcd | 52 | } |
1da177e4 LT |
53 | } |
54 | ||
efb1a57d | 55 | static struct kmem_cache *proc_inode_cachep __ro_after_init; |
195b8cf0 | 56 | static struct kmem_cache *pde_opener_cache __ro_after_init; |
1da177e4 LT |
57 | |
58 | static struct inode *proc_alloc_inode(struct super_block *sb) | |
59 | { | |
60 | struct proc_inode *ei; | |
1da177e4 | 61 | |
f245e1c1 | 62 | ei = kmem_cache_alloc(proc_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
63 | if (!ei) |
64 | return NULL; | |
13b41b09 | 65 | ei->pid = NULL; |
aed7a6c4 | 66 | ei->fd = 0; |
1da177e4 LT |
67 | ei->op.proc_get_link = NULL; |
68 | ei->pde = NULL; | |
9043476f AV |
69 | ei->sysctl = NULL; |
70 | ei->sysctl_entry = NULL; | |
3d3d35b1 | 71 | ei->ns_ops = NULL; |
230f72e9 | 72 | return &ei->vfs_inode; |
1da177e4 LT |
73 | } |
74 | ||
4aa6b55c | 75 | static void proc_free_inode(struct inode *inode) |
1da177e4 LT |
76 | { |
77 | kmem_cache_free(proc_inode_cachep, PROC_I(inode)); | |
78 | } | |
79 | ||
51cc5068 | 80 | static void init_once(void *foo) |
1da177e4 LT |
81 | { |
82 | struct proc_inode *ei = (struct proc_inode *) foo; | |
83 | ||
a35afb83 | 84 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 85 | } |
20c2df83 | 86 | |
195b8cf0 | 87 | void __init proc_init_kmemcache(void) |
1da177e4 LT |
88 | { |
89 | proc_inode_cachep = kmem_cache_create("proc_inode_cache", | |
90 | sizeof(struct proc_inode), | |
fffb60f9 | 91 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 VD |
92 | SLAB_MEM_SPREAD|SLAB_ACCOUNT| |
93 | SLAB_PANIC), | |
20c2df83 | 94 | init_once); |
195b8cf0 AD |
95 | pde_opener_cache = |
96 | kmem_cache_create("pde_opener", sizeof(struct pde_opener), 0, | |
2acddbe8 | 97 | SLAB_ACCOUNT|SLAB_PANIC, NULL); |
b4884f23 | 98 | proc_dir_entry_cache = kmem_cache_create_usercopy( |
2d6e4e82 AD |
99 | "proc_dir_entry", SIZEOF_PDE, 0, SLAB_PANIC, |
100 | offsetof(struct proc_dir_entry, inline_name), | |
101 | SIZEOF_PDE_INLINE_NAME, NULL); | |
102 | BUILD_BUG_ON(sizeof(struct proc_dir_entry) >= SIZEOF_PDE); | |
1da177e4 LT |
103 | } |
104 | ||
97412950 VK |
105 | static int proc_show_options(struct seq_file *seq, struct dentry *root) |
106 | { | |
0499680a VK |
107 | struct super_block *sb = root->d_sb; |
108 | struct pid_namespace *pid = sb->s_fs_info; | |
109 | ||
dcb0f222 EB |
110 | if (!gid_eq(pid->pid_gid, GLOBAL_ROOT_GID)) |
111 | seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, pid->pid_gid)); | |
796f571b | 112 | if (pid->hide_pid != HIDEPID_OFF) |
0499680a VK |
113 | seq_printf(seq, ",hidepid=%u", pid->hide_pid); |
114 | ||
97412950 VK |
115 | return 0; |
116 | } | |
117 | ||
60a3c3a5 | 118 | const struct super_operations proc_sops = { |
1da177e4 | 119 | .alloc_inode = proc_alloc_inode, |
4aa6b55c | 120 | .free_inode = proc_free_inode, |
1da177e4 | 121 | .drop_inode = generic_delete_inode, |
8267952b | 122 | .evict_inode = proc_evict_inode, |
1da177e4 | 123 | .statfs = simple_statfs, |
97412950 | 124 | .show_options = proc_show_options, |
1da177e4 LT |
125 | }; |
126 | ||
866ad9a7 AV |
127 | enum {BIAS = -1U<<31}; |
128 | ||
129 | static inline int use_pde(struct proc_dir_entry *pde) | |
130 | { | |
15b158b4 | 131 | return likely(atomic_inc_unless_negative(&pde->in_use)); |
881adb85 AD |
132 | } |
133 | ||
866ad9a7 | 134 | static void unuse_pde(struct proc_dir_entry *pde) |
881adb85 | 135 | { |
15b158b4 | 136 | if (unlikely(atomic_dec_return(&pde->in_use) == BIAS)) |
05c0ae21 | 137 | complete(pde->pde_unload_completion); |
786d7e16 AD |
138 | } |
139 | ||
2f897424 | 140 | /* pde is locked on entry, unlocked on exit */ |
ca469f35 AV |
141 | static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo) |
142 | { | |
492b2da6 AD |
143 | /* |
144 | * close() (proc_reg_release()) can't delete an entry and proceed: | |
145 | * ->release hook needs to be available at the right moment. | |
146 | * | |
147 | * rmmod (remove_proc_entry() et al) can't delete an entry and proceed: | |
148 | * "struct file" needs to be available at the right moment. | |
149 | * | |
150 | * Therefore, first process to enter this function does ->release() and | |
151 | * signals its completion to the other process which does nothing. | |
152 | */ | |
05c0ae21 | 153 | if (pdeo->closing) { |
ca469f35 | 154 | /* somebody else is doing that, just wait */ |
05c0ae21 AV |
155 | DECLARE_COMPLETION_ONSTACK(c); |
156 | pdeo->c = &c; | |
ca469f35 | 157 | spin_unlock(&pde->pde_unload_lock); |
05c0ae21 | 158 | wait_for_completion(&c); |
ca469f35 AV |
159 | } else { |
160 | struct file *file; | |
2f897424 AD |
161 | struct completion *c; |
162 | ||
f5887c71 | 163 | pdeo->closing = true; |
ca469f35 AV |
164 | spin_unlock(&pde->pde_unload_lock); |
165 | file = pdeo->file; | |
166 | pde->proc_fops->release(file_inode(file), file); | |
167 | spin_lock(&pde->pde_unload_lock); | |
492b2da6 | 168 | /* After ->release. */ |
06a0c417 | 169 | list_del(&pdeo->lh); |
2f897424 AD |
170 | c = pdeo->c; |
171 | spin_unlock(&pde->pde_unload_lock); | |
172 | if (unlikely(c)) | |
173 | complete(c); | |
195b8cf0 | 174 | kmem_cache_free(pde_opener_cache, pdeo); |
05c0ae21 | 175 | } |
ca469f35 AV |
176 | } |
177 | ||
866ad9a7 | 178 | void proc_entry_rundown(struct proc_dir_entry *de) |
786d7e16 | 179 | { |
05c0ae21 | 180 | DECLARE_COMPLETION_ONSTACK(c); |
866ad9a7 | 181 | /* Wait until all existing callers into module are done. */ |
05c0ae21 AV |
182 | de->pde_unload_completion = &c; |
183 | if (atomic_add_return(BIAS, &de->in_use) != BIAS) | |
184 | wait_for_completion(&c); | |
786d7e16 | 185 | |
492b2da6 AD |
186 | /* ->pde_openers list can't grow from now on. */ |
187 | ||
05c0ae21 | 188 | spin_lock(&de->pde_unload_lock); |
866ad9a7 AV |
189 | while (!list_empty(&de->pde_openers)) { |
190 | struct pde_opener *pdeo; | |
866ad9a7 | 191 | pdeo = list_first_entry(&de->pde_openers, struct pde_opener, lh); |
ca469f35 | 192 | close_pdeo(de, pdeo); |
2f897424 | 193 | spin_lock(&de->pde_unload_lock); |
866ad9a7 AV |
194 | } |
195 | spin_unlock(&de->pde_unload_lock); | |
786d7e16 AD |
196 | } |
197 | ||
866ad9a7 AV |
198 | static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence) |
199 | { | |
200 | struct proc_dir_entry *pde = PDE(file_inode(file)); | |
201 | loff_t rv = -EINVAL; | |
202 | if (use_pde(pde)) { | |
9af27b28 AD |
203 | typeof_member(struct file_operations, llseek) llseek; |
204 | ||
866ad9a7 AV |
205 | llseek = pde->proc_fops->llseek; |
206 | if (!llseek) | |
207 | llseek = default_llseek; | |
208 | rv = llseek(file, offset, whence); | |
209 | unuse_pde(pde); | |
210 | } | |
786d7e16 AD |
211 | return rv; |
212 | } | |
213 | ||
866ad9a7 | 214 | static ssize_t proc_reg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
786d7e16 | 215 | { |
496ad9aa | 216 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
786d7e16 | 217 | ssize_t rv = -EIO; |
866ad9a7 | 218 | if (use_pde(pde)) { |
9af27b28 AD |
219 | typeof_member(struct file_operations, read) read; |
220 | ||
866ad9a7 AV |
221 | read = pde->proc_fops->read; |
222 | if (read) | |
223 | rv = read(file, buf, count, ppos); | |
224 | unuse_pde(pde); | |
786d7e16 | 225 | } |
866ad9a7 AV |
226 | return rv; |
227 | } | |
786d7e16 | 228 | |
866ad9a7 AV |
229 | static ssize_t proc_reg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
230 | { | |
866ad9a7 AV |
231 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
232 | ssize_t rv = -EIO; | |
233 | if (use_pde(pde)) { | |
9af27b28 AD |
234 | typeof_member(struct file_operations, write) write; |
235 | ||
866ad9a7 AV |
236 | write = pde->proc_fops->write; |
237 | if (write) | |
238 | rv = write(file, buf, count, ppos); | |
239 | unuse_pde(pde); | |
240 | } | |
786d7e16 AD |
241 | return rv; |
242 | } | |
243 | ||
076ccb76 | 244 | static __poll_t proc_reg_poll(struct file *file, struct poll_table_struct *pts) |
786d7e16 | 245 | { |
496ad9aa | 246 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
e6c8adca | 247 | __poll_t rv = DEFAULT_POLLMASK; |
866ad9a7 | 248 | if (use_pde(pde)) { |
9af27b28 AD |
249 | typeof_member(struct file_operations, poll) poll; |
250 | ||
866ad9a7 AV |
251 | poll = pde->proc_fops->poll; |
252 | if (poll) | |
253 | rv = poll(file, pts); | |
254 | unuse_pde(pde); | |
786d7e16 | 255 | } |
786d7e16 AD |
256 | return rv; |
257 | } | |
258 | ||
259 | static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
260 | { | |
496ad9aa | 261 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
786d7e16 | 262 | long rv = -ENOTTY; |
866ad9a7 | 263 | if (use_pde(pde)) { |
9af27b28 AD |
264 | typeof_member(struct file_operations, unlocked_ioctl) ioctl; |
265 | ||
866ad9a7 AV |
266 | ioctl = pde->proc_fops->unlocked_ioctl; |
267 | if (ioctl) | |
268 | rv = ioctl(file, cmd, arg); | |
269 | unuse_pde(pde); | |
786d7e16 | 270 | } |
786d7e16 AD |
271 | return rv; |
272 | } | |
273 | ||
274 | #ifdef CONFIG_COMPAT | |
275 | static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
276 | { | |
496ad9aa | 277 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
786d7e16 | 278 | long rv = -ENOTTY; |
866ad9a7 | 279 | if (use_pde(pde)) { |
9af27b28 AD |
280 | typeof_member(struct file_operations, compat_ioctl) compat_ioctl; |
281 | ||
866ad9a7 AV |
282 | compat_ioctl = pde->proc_fops->compat_ioctl; |
283 | if (compat_ioctl) | |
284 | rv = compat_ioctl(file, cmd, arg); | |
285 | unuse_pde(pde); | |
786d7e16 | 286 | } |
786d7e16 AD |
287 | return rv; |
288 | } | |
289 | #endif | |
290 | ||
291 | static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma) | |
292 | { | |
496ad9aa | 293 | struct proc_dir_entry *pde = PDE(file_inode(file)); |
786d7e16 | 294 | int rv = -EIO; |
866ad9a7 | 295 | if (use_pde(pde)) { |
9af27b28 AD |
296 | typeof_member(struct file_operations, mmap) mmap; |
297 | ||
866ad9a7 AV |
298 | mmap = pde->proc_fops->mmap; |
299 | if (mmap) | |
300 | rv = mmap(file, vma); | |
301 | unuse_pde(pde); | |
786d7e16 | 302 | } |
786d7e16 AD |
303 | return rv; |
304 | } | |
305 | ||
5721cf84 HD |
306 | static unsigned long |
307 | proc_reg_get_unmapped_area(struct file *file, unsigned long orig_addr, | |
308 | unsigned long len, unsigned long pgoff, | |
309 | unsigned long flags) | |
c4fe2448 AD |
310 | { |
311 | struct proc_dir_entry *pde = PDE(file_inode(file)); | |
2cbe3b0a | 312 | unsigned long rv = -EIO; |
ae5758a1 | 313 | |
c4fe2448 | 314 | if (use_pde(pde)) { |
9af27b28 | 315 | typeof_member(struct file_operations, get_unmapped_area) get_area; |
ae5758a1 JB |
316 | |
317 | get_area = pde->proc_fops->get_unmapped_area; | |
fad1a86e | 318 | #ifdef CONFIG_MMU |
ae5758a1 JB |
319 | if (!get_area) |
320 | get_area = current->mm->get_unmapped_area; | |
fad1a86e | 321 | #endif |
ae5758a1 | 322 | |
5721cf84 HD |
323 | if (get_area) |
324 | rv = get_area(file, orig_addr, len, pgoff, flags); | |
ae5758a1 JB |
325 | else |
326 | rv = orig_addr; | |
c4fe2448 AD |
327 | unuse_pde(pde); |
328 | } | |
329 | return rv; | |
330 | } | |
331 | ||
786d7e16 AD |
332 | static int proc_reg_open(struct inode *inode, struct file *file) |
333 | { | |
334 | struct proc_dir_entry *pde = PDE(inode); | |
335 | int rv = 0; | |
9af27b28 AD |
336 | typeof_member(struct file_operations, open) open; |
337 | typeof_member(struct file_operations, release) release; | |
881adb85 AD |
338 | struct pde_opener *pdeo; |
339 | ||
340 | /* | |
492b2da6 AD |
341 | * Ensure that |
342 | * 1) PDE's ->release hook will be called no matter what | |
343 | * either normally by close()/->release, or forcefully by | |
344 | * rmmod/remove_proc_entry. | |
345 | * | |
346 | * 2) rmmod isn't blocked by opening file in /proc and sitting on | |
347 | * the descriptor (including "rmmod foo </proc/foo" scenario). | |
881adb85 | 348 | * |
492b2da6 | 349 | * Save every "struct file" with custom ->release hook. |
881adb85 | 350 | */ |
e7a6e291 | 351 | if (!use_pde(pde)) |
d2857e79 | 352 | return -ENOENT; |
e7a6e291 | 353 | |
881adb85 | 354 | release = pde->proc_fops->release; |
e7a6e291 | 355 | if (release) { |
195b8cf0 | 356 | pdeo = kmem_cache_alloc(pde_opener_cache, GFP_KERNEL); |
e7a6e291 AD |
357 | if (!pdeo) { |
358 | rv = -ENOMEM; | |
359 | goto out_unuse; | |
360 | } | |
361 | } | |
786d7e16 | 362 | |
e7a6e291 | 363 | open = pde->proc_fops->open; |
786d7e16 AD |
364 | if (open) |
365 | rv = open(inode, file); | |
366 | ||
e7a6e291 AD |
367 | if (release) { |
368 | if (rv == 0) { | |
369 | /* To know what to release. */ | |
370 | pdeo->file = file; | |
371 | pdeo->closing = false; | |
372 | pdeo->c = NULL; | |
373 | spin_lock(&pde->pde_unload_lock); | |
374 | list_add(&pdeo->lh, &pde->pde_openers); | |
375 | spin_unlock(&pde->pde_unload_lock); | |
376 | } else | |
195b8cf0 | 377 | kmem_cache_free(pde_opener_cache, pdeo); |
e7a6e291 | 378 | } |
05c0ae21 | 379 | |
e7a6e291 | 380 | out_unuse: |
05c0ae21 | 381 | unuse_pde(pde); |
786d7e16 AD |
382 | return rv; |
383 | } | |
384 | ||
385 | static int proc_reg_release(struct inode *inode, struct file *file) | |
386 | { | |
387 | struct proc_dir_entry *pde = PDE(inode); | |
881adb85 | 388 | struct pde_opener *pdeo; |
786d7e16 | 389 | spin_lock(&pde->pde_unload_lock); |
ca469f35 AV |
390 | list_for_each_entry(pdeo, &pde->pde_openers, lh) { |
391 | if (pdeo->file == file) { | |
392 | close_pdeo(pde, pdeo); | |
2f897424 | 393 | return 0; |
ca469f35 | 394 | } |
881adb85 | 395 | } |
786d7e16 | 396 | spin_unlock(&pde->pde_unload_lock); |
ca469f35 | 397 | return 0; |
786d7e16 AD |
398 | } |
399 | ||
400 | static const struct file_operations proc_reg_file_ops = { | |
401 | .llseek = proc_reg_llseek, | |
402 | .read = proc_reg_read, | |
403 | .write = proc_reg_write, | |
404 | .poll = proc_reg_poll, | |
405 | .unlocked_ioctl = proc_reg_unlocked_ioctl, | |
406 | #ifdef CONFIG_COMPAT | |
407 | .compat_ioctl = proc_reg_compat_ioctl, | |
408 | #endif | |
409 | .mmap = proc_reg_mmap, | |
c4fe2448 | 410 | .get_unmapped_area = proc_reg_get_unmapped_area, |
786d7e16 AD |
411 | .open = proc_reg_open, |
412 | .release = proc_reg_release, | |
413 | }; | |
414 | ||
778f3dd5 DM |
415 | #ifdef CONFIG_COMPAT |
416 | static const struct file_operations proc_reg_file_ops_no_compat = { | |
417 | .llseek = proc_reg_llseek, | |
418 | .read = proc_reg_read, | |
419 | .write = proc_reg_write, | |
420 | .poll = proc_reg_poll, | |
421 | .unlocked_ioctl = proc_reg_unlocked_ioctl, | |
422 | .mmap = proc_reg_mmap, | |
c4fe2448 | 423 | .get_unmapped_area = proc_reg_get_unmapped_area, |
778f3dd5 DM |
424 | .open = proc_reg_open, |
425 | .release = proc_reg_release, | |
426 | }; | |
427 | #endif | |
428 | ||
fceef393 AV |
429 | static void proc_put_link(void *p) |
430 | { | |
431 | unuse_pde(p); | |
432 | } | |
433 | ||
6b255391 | 434 | static const char *proc_get_link(struct dentry *dentry, |
fceef393 AV |
435 | struct inode *inode, |
436 | struct delayed_call *done) | |
7e0e953b | 437 | { |
6b255391 | 438 | struct proc_dir_entry *pde = PDE(inode); |
15b158b4 | 439 | if (!use_pde(pde)) |
7e0e953b | 440 | return ERR_PTR(-EINVAL); |
fceef393 | 441 | set_delayed_call(done, proc_put_link, pde); |
680baacb | 442 | return pde->data; |
7e0e953b AV |
443 | } |
444 | ||
7e0e953b | 445 | const struct inode_operations proc_link_inode_operations = { |
6b255391 | 446 | .get_link = proc_get_link, |
7e0e953b AV |
447 | }; |
448 | ||
6d1b6e4e | 449 | struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) |
1da177e4 | 450 | { |
51f0885e | 451 | struct inode *inode = new_inode_pseudo(sb); |
1da177e4 | 452 | |
51f0885e LT |
453 | if (inode) { |
454 | inode->i_ino = de->low_ino; | |
078cd827 | 455 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
a1d4aebb | 456 | PROC_I(inode)->pde = de; |
5e971dce | 457 | |
eb6d38d5 EB |
458 | if (is_empty_pde(de)) { |
459 | make_empty_dir_inode(inode); | |
460 | return inode; | |
461 | } | |
5e971dce AD |
462 | if (de->mode) { |
463 | inode->i_mode = de->mode; | |
464 | inode->i_uid = de->uid; | |
465 | inode->i_gid = de->gid; | |
466 | } | |
467 | if (de->size) | |
468 | inode->i_size = de->size; | |
469 | if (de->nlink) | |
bfe86848 | 470 | set_nlink(inode, de->nlink); |
b6cdc731 AV |
471 | WARN_ON(!de->proc_iops); |
472 | inode->i_op = de->proc_iops; | |
5e971dce AD |
473 | if (de->proc_fops) { |
474 | if (S_ISREG(inode->i_mode)) { | |
778f3dd5 | 475 | #ifdef CONFIG_COMPAT |
5e971dce AD |
476 | if (!de->proc_fops->compat_ioctl) |
477 | inode->i_fop = | |
478 | &proc_reg_file_ops_no_compat; | |
479 | else | |
778f3dd5 | 480 | #endif |
5e971dce AD |
481 | inode->i_fop = &proc_reg_file_ops; |
482 | } else { | |
483 | inode->i_fop = de->proc_fops; | |
778f3dd5 | 484 | } |
786d7e16 | 485 | } |
99b76233 | 486 | } else |
135d5655 | 487 | pde_put(de); |
1da177e4 | 488 | return inode; |
d3d009cb | 489 | } |