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Commit | Line | Data |
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0b73214f | 1 | // SPDX-License-Identifier: GPL-1.0+ |
24bbb1fa | 2 | /* |
24bbb1fa MH |
3 | * Hypervisor filesystem for Linux on s390. |
4 | * | |
f55495ba | 5 | * Copyright IBM Corp. 2006, 2008 |
24bbb1fa MH |
6 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
7 | */ | |
8 | ||
f55495ba MH |
9 | #define KMSG_COMPONENT "hypfs" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
24bbb1fa MH |
12 | #include <linux/types.h> |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/namei.h> | |
16 | #include <linux/vfs.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
24bbb1fa | 18 | #include <linux/pagemap.h> |
24bbb1fa MH |
19 | #include <linux/time.h> |
20 | #include <linux/parser.h> | |
21 | #include <linux/sysfs.h> | |
cee672e1 PG |
22 | #include <linux/init.h> |
23 | #include <linux/kobject.h> | |
b01af5ba MH |
24 | #include <linux/seq_file.h> |
25 | #include <linux/mount.h> | |
e2e40f2c | 26 | #include <linux/uio.h> |
24bbb1fa MH |
27 | #include <asm/ebcdic.h> |
28 | #include "hypfs.h" | |
24bbb1fa MH |
29 | |
30 | #define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */ | |
31 | #define TMP_SIZE 64 /* size of temporary buffers */ | |
32 | ||
a118cfdf | 33 | static struct dentry *hypfs_create_update_file(struct dentry *dir); |
24bbb1fa MH |
34 | |
35 | struct hypfs_sb_info { | |
6a62a216 EB |
36 | kuid_t uid; /* uid used for files and dirs */ |
37 | kgid_t gid; /* gid used for files and dirs */ | |
24bbb1fa MH |
38 | struct dentry *update_file; /* file to trigger update */ |
39 | time_t last_update; /* last update time in secs since 1970 */ | |
40 | struct mutex lock; /* lock to protect update process */ | |
41 | }; | |
42 | ||
5dfe4c96 | 43 | static const struct file_operations hypfs_file_ops; |
24bbb1fa | 44 | static struct file_system_type hypfs_type; |
b87221de | 45 | static const struct super_operations hypfs_s_ops; |
24bbb1fa MH |
46 | |
47 | /* start of list of all dentries, which have to be deleted on update */ | |
48 | static struct dentry *hypfs_last_dentry; | |
49 | ||
50 | static void hypfs_update_update(struct super_block *sb) | |
51 | { | |
52 | struct hypfs_sb_info *sb_info = sb->s_fs_info; | |
75c3cfa8 | 53 | struct inode *inode = d_inode(sb_info->update_file); |
24bbb1fa MH |
54 | |
55 | sb_info->last_update = get_seconds(); | |
078cd827 | 56 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
24bbb1fa MH |
57 | } |
58 | ||
59 | /* directory tree removal functions */ | |
60 | ||
61 | static void hypfs_add_dentry(struct dentry *dentry) | |
62 | { | |
63 | dentry->d_fsdata = hypfs_last_dentry; | |
64 | hypfs_last_dentry = dentry; | |
65 | } | |
66 | ||
67 | static void hypfs_remove(struct dentry *dentry) | |
68 | { | |
69 | struct dentry *parent; | |
70 | ||
71 | parent = dentry->d_parent; | |
5955102c | 72 | inode_lock(d_inode(parent)); |
dc3f4198 | 73 | if (simple_positive(dentry)) { |
e36cb0b8 | 74 | if (d_is_dir(dentry)) |
75c3cfa8 | 75 | simple_rmdir(d_inode(parent), dentry); |
9b5a03e1 | 76 | else |
75c3cfa8 | 77 | simple_unlink(d_inode(parent), dentry); |
9b5a03e1 | 78 | } |
24bbb1fa MH |
79 | d_delete(dentry); |
80 | dput(dentry); | |
5955102c | 81 | inode_unlock(d_inode(parent)); |
24bbb1fa MH |
82 | } |
83 | ||
84 | static void hypfs_delete_tree(struct dentry *root) | |
85 | { | |
86 | while (hypfs_last_dentry) { | |
87 | struct dentry *next_dentry; | |
88 | next_dentry = hypfs_last_dentry->d_fsdata; | |
89 | hypfs_remove(hypfs_last_dentry); | |
90 | hypfs_last_dentry = next_dentry; | |
91 | } | |
92 | } | |
93 | ||
fec0ebae | 94 | static struct inode *hypfs_make_inode(struct super_block *sb, umode_t mode) |
24bbb1fa MH |
95 | { |
96 | struct inode *ret = new_inode(sb); | |
97 | ||
98 | if (ret) { | |
99 | struct hypfs_sb_info *hypfs_info = sb->s_fs_info; | |
c960bec4 | 100 | ret->i_ino = get_next_ino(); |
24bbb1fa MH |
101 | ret->i_mode = mode; |
102 | ret->i_uid = hypfs_info->uid; | |
103 | ret->i_gid = hypfs_info->gid; | |
078cd827 | 104 | ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); |
fec0ebae | 105 | if (S_ISDIR(mode)) |
bfe86848 | 106 | set_nlink(ret, 2); |
24bbb1fa MH |
107 | } |
108 | return ret; | |
109 | } | |
110 | ||
b69257f2 | 111 | static void hypfs_evict_inode(struct inode *inode) |
24bbb1fa | 112 | { |
dbd5768f | 113 | clear_inode(inode); |
8e18e294 | 114 | kfree(inode->i_private); |
24bbb1fa MH |
115 | } |
116 | ||
117 | static int hypfs_open(struct inode *inode, struct file *filp) | |
118 | { | |
496ad9aa | 119 | char *data = file_inode(filp)->i_private; |
24bbb1fa MH |
120 | struct hypfs_sb_info *fs_info; |
121 | ||
122 | if (filp->f_mode & FMODE_WRITE) { | |
123 | if (!(inode->i_mode & S_IWUGO)) | |
124 | return -EACCES; | |
125 | } | |
126 | if (filp->f_mode & FMODE_READ) { | |
127 | if (!(inode->i_mode & S_IRUGO)) | |
128 | return -EACCES; | |
129 | } | |
130 | ||
131 | fs_info = inode->i_sb->s_fs_info; | |
132 | if(data) { | |
133 | mutex_lock(&fs_info->lock); | |
134 | filp->private_data = kstrdup(data, GFP_KERNEL); | |
135 | if (!filp->private_data) { | |
136 | mutex_unlock(&fs_info->lock); | |
137 | return -ENOMEM; | |
138 | } | |
139 | mutex_unlock(&fs_info->lock); | |
140 | } | |
58ea91c0 | 141 | return nonseekable_open(inode, filp); |
24bbb1fa MH |
142 | } |
143 | ||
a457ac28 | 144 | static ssize_t hypfs_read_iter(struct kiocb *iocb, struct iov_iter *to) |
24bbb1fa | 145 | { |
a457ac28 AV |
146 | struct file *file = iocb->ki_filp; |
147 | char *data = file->private_data; | |
148 | size_t available = strlen(data); | |
149 | loff_t pos = iocb->ki_pos; | |
150 | size_t count; | |
a29591c4 | 151 | |
a457ac28 AV |
152 | if (pos < 0) |
153 | return -EINVAL; | |
154 | if (pos >= available || !iov_iter_count(to)) | |
155 | return 0; | |
156 | count = copy_to_iter(data + pos, available - pos, to); | |
157 | if (!count) | |
158 | return -EFAULT; | |
159 | iocb->ki_pos = pos + count; | |
160 | file_accessed(file); | |
161 | return count; | |
24bbb1fa | 162 | } |
a457ac28 AV |
163 | |
164 | static ssize_t hypfs_write_iter(struct kiocb *iocb, struct iov_iter *from) | |
24bbb1fa MH |
165 | { |
166 | int rc; | |
6131ffaa AV |
167 | struct super_block *sb = file_inode(iocb->ki_filp)->i_sb; |
168 | struct hypfs_sb_info *fs_info = sb->s_fs_info; | |
a457ac28 | 169 | size_t count = iov_iter_count(from); |
24bbb1fa | 170 | |
24bbb1fa MH |
171 | /* |
172 | * Currently we only allow one update per second for two reasons: | |
173 | * 1. diag 204 is VERY expensive | |
174 | * 2. If several processes do updates in parallel and then read the | |
175 | * hypfs data, the likelihood of collisions is reduced, if we restrict | |
176 | * the minimum update interval. A collision occurs, if during the | |
177 | * data gathering of one process another process triggers an update | |
178 | * If the first process wants to ensure consistent data, it has | |
179 | * to restart data collection in this case. | |
180 | */ | |
181 | mutex_lock(&fs_info->lock); | |
182 | if (fs_info->last_update == get_seconds()) { | |
183 | rc = -EBUSY; | |
184 | goto out; | |
185 | } | |
186 | hypfs_delete_tree(sb->s_root); | |
31cb4bd3 | 187 | if (MACHINE_IS_VM) |
f78e41e3 | 188 | rc = hypfs_vm_create_files(sb->s_root); |
31cb4bd3 | 189 | else |
e334cf4f | 190 | rc = hypfs_diag_create_files(sb->s_root); |
24bbb1fa | 191 | if (rc) { |
f55495ba | 192 | pr_err("Updating the hypfs tree failed\n"); |
24bbb1fa MH |
193 | hypfs_delete_tree(sb->s_root); |
194 | goto out; | |
195 | } | |
196 | hypfs_update_update(sb); | |
197 | rc = count; | |
a457ac28 | 198 | iov_iter_advance(from, count); |
24bbb1fa MH |
199 | out: |
200 | mutex_unlock(&fs_info->lock); | |
201 | return rc; | |
202 | } | |
203 | ||
204 | static int hypfs_release(struct inode *inode, struct file *filp) | |
205 | { | |
206 | kfree(filp->private_data); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | enum { opt_uid, opt_gid, opt_err }; | |
211 | ||
a447c093 | 212 | static const match_table_t hypfs_tokens = { |
24bbb1fa MH |
213 | {opt_uid, "uid=%u"}, |
214 | {opt_gid, "gid=%u"}, | |
215 | {opt_err, NULL} | |
216 | }; | |
217 | ||
218 | static int hypfs_parse_options(char *options, struct super_block *sb) | |
219 | { | |
220 | char *str; | |
221 | substring_t args[MAX_OPT_ARGS]; | |
6a62a216 EB |
222 | kuid_t uid; |
223 | kgid_t gid; | |
24bbb1fa MH |
224 | |
225 | if (!options) | |
226 | return 0; | |
227 | while ((str = strsep(&options, ",")) != NULL) { | |
228 | int token, option; | |
229 | struct hypfs_sb_info *hypfs_info = sb->s_fs_info; | |
230 | ||
231 | if (!*str) | |
232 | continue; | |
233 | token = match_token(str, hypfs_tokens, args); | |
234 | switch (token) { | |
235 | case opt_uid: | |
236 | if (match_int(&args[0], &option)) | |
237 | return -EINVAL; | |
6a62a216 EB |
238 | uid = make_kuid(current_user_ns(), option); |
239 | if (!uid_valid(uid)) | |
240 | return -EINVAL; | |
241 | hypfs_info->uid = uid; | |
24bbb1fa MH |
242 | break; |
243 | case opt_gid: | |
244 | if (match_int(&args[0], &option)) | |
245 | return -EINVAL; | |
6a62a216 EB |
246 | gid = make_kgid(current_user_ns(), option); |
247 | if (!gid_valid(gid)) | |
248 | return -EINVAL; | |
249 | hypfs_info->gid = gid; | |
24bbb1fa MH |
250 | break; |
251 | case opt_err: | |
252 | default: | |
f55495ba | 253 | pr_err("%s is not a valid mount option\n", str); |
24bbb1fa MH |
254 | return -EINVAL; |
255 | } | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
34c80b1d | 260 | static int hypfs_show_options(struct seq_file *s, struct dentry *root) |
b01af5ba | 261 | { |
34c80b1d | 262 | struct hypfs_sb_info *hypfs_info = root->d_sb->s_fs_info; |
b01af5ba | 263 | |
6a62a216 EB |
264 | seq_printf(s, ",uid=%u", from_kuid_munged(&init_user_ns, hypfs_info->uid)); |
265 | seq_printf(s, ",gid=%u", from_kgid_munged(&init_user_ns, hypfs_info->gid)); | |
b01af5ba MH |
266 | return 0; |
267 | } | |
268 | ||
24bbb1fa MH |
269 | static int hypfs_fill_super(struct super_block *sb, void *data, int silent) |
270 | { | |
271 | struct inode *root_inode; | |
272 | struct dentry *root_dentry; | |
273 | int rc = 0; | |
274 | struct hypfs_sb_info *sbi; | |
275 | ||
276 | sbi = kzalloc(sizeof(struct hypfs_sb_info), GFP_KERNEL); | |
277 | if (!sbi) | |
278 | return -ENOMEM; | |
279 | mutex_init(&sbi->lock); | |
e5423705 DH |
280 | sbi->uid = current_uid(); |
281 | sbi->gid = current_gid(); | |
24bbb1fa | 282 | sb->s_fs_info = sbi; |
09cbfeaf KS |
283 | sb->s_blocksize = PAGE_SIZE; |
284 | sb->s_blocksize_bits = PAGE_SHIFT; | |
24bbb1fa MH |
285 | sb->s_magic = HYPFS_MAGIC; |
286 | sb->s_op = &hypfs_s_ops; | |
f1771ffa AV |
287 | if (hypfs_parse_options(data, sb)) |
288 | return -EINVAL; | |
24bbb1fa | 289 | root_inode = hypfs_make_inode(sb, S_IFDIR | 0755); |
f1771ffa AV |
290 | if (!root_inode) |
291 | return -ENOMEM; | |
24bbb1fa MH |
292 | root_inode->i_op = &simple_dir_inode_operations; |
293 | root_inode->i_fop = &simple_dir_operations; | |
48fde701 AV |
294 | sb->s_root = root_dentry = d_make_root(root_inode); |
295 | if (!root_dentry) | |
f1771ffa | 296 | return -ENOMEM; |
31cb4bd3 | 297 | if (MACHINE_IS_VM) |
f78e41e3 | 298 | rc = hypfs_vm_create_files(root_dentry); |
31cb4bd3 | 299 | else |
e334cf4f | 300 | rc = hypfs_diag_create_files(root_dentry); |
24bbb1fa | 301 | if (rc) |
f1771ffa | 302 | return rc; |
a118cfdf | 303 | sbi->update_file = hypfs_create_update_file(root_dentry); |
f1771ffa AV |
304 | if (IS_ERR(sbi->update_file)) |
305 | return PTR_ERR(sbi->update_file); | |
24bbb1fa | 306 | hypfs_update_update(sb); |
f55495ba | 307 | pr_info("Hypervisor filesystem mounted\n"); |
24bbb1fa | 308 | return 0; |
24bbb1fa MH |
309 | } |
310 | ||
fc14f2fe AV |
311 | static struct dentry *hypfs_mount(struct file_system_type *fst, int flags, |
312 | const char *devname, void *data) | |
24bbb1fa | 313 | { |
fc14f2fe | 314 | return mount_single(fst, flags, data, hypfs_fill_super); |
24bbb1fa MH |
315 | } |
316 | ||
317 | static void hypfs_kill_super(struct super_block *sb) | |
318 | { | |
319 | struct hypfs_sb_info *sb_info = sb->s_fs_info; | |
320 | ||
f1771ffa | 321 | if (sb->s_root) |
388c571c | 322 | hypfs_delete_tree(sb->s_root); |
f1771ffa | 323 | if (sb_info->update_file) |
388c571c | 324 | hypfs_remove(sb_info->update_file); |
f1771ffa AV |
325 | kfree(sb->s_fs_info); |
326 | sb->s_fs_info = NULL; | |
24bbb1fa MH |
327 | kill_litter_super(sb); |
328 | } | |
329 | ||
a118cfdf | 330 | static struct dentry *hypfs_create_file(struct dentry *parent, const char *name, |
fec0ebae | 331 | char *data, umode_t mode) |
24bbb1fa MH |
332 | { |
333 | struct dentry *dentry; | |
334 | struct inode *inode; | |
24bbb1fa | 335 | |
5955102c | 336 | inode_lock(d_inode(parent)); |
24bbb1fa | 337 | dentry = lookup_one_len(name, parent, strlen(name)); |
9b5a03e1 MH |
338 | if (IS_ERR(dentry)) { |
339 | dentry = ERR_PTR(-ENOMEM); | |
340 | goto fail; | |
341 | } | |
a118cfdf | 342 | inode = hypfs_make_inode(parent->d_sb, mode); |
24bbb1fa MH |
343 | if (!inode) { |
344 | dput(dentry); | |
9b5a03e1 MH |
345 | dentry = ERR_PTR(-ENOMEM); |
346 | goto fail; | |
24bbb1fa | 347 | } |
fec0ebae | 348 | if (S_ISREG(mode)) { |
24bbb1fa MH |
349 | inode->i_fop = &hypfs_file_ops; |
350 | if (data) | |
351 | inode->i_size = strlen(data); | |
352 | else | |
353 | inode->i_size = 0; | |
fec0ebae | 354 | } else if (S_ISDIR(mode)) { |
24bbb1fa MH |
355 | inode->i_op = &simple_dir_inode_operations; |
356 | inode->i_fop = &simple_dir_operations; | |
75c3cfa8 | 357 | inc_nlink(d_inode(parent)); |
24bbb1fa MH |
358 | } else |
359 | BUG(); | |
8e18e294 | 360 | inode->i_private = data; |
24bbb1fa MH |
361 | d_instantiate(dentry, inode); |
362 | dget(dentry); | |
9b5a03e1 | 363 | fail: |
5955102c | 364 | inode_unlock(d_inode(parent)); |
24bbb1fa MH |
365 | return dentry; |
366 | } | |
367 | ||
a118cfdf | 368 | struct dentry *hypfs_mkdir(struct dentry *parent, const char *name) |
24bbb1fa MH |
369 | { |
370 | struct dentry *dentry; | |
371 | ||
a118cfdf | 372 | dentry = hypfs_create_file(parent, name, NULL, S_IFDIR | DIR_MODE); |
24bbb1fa MH |
373 | if (IS_ERR(dentry)) |
374 | return dentry; | |
375 | hypfs_add_dentry(dentry); | |
24bbb1fa MH |
376 | return dentry; |
377 | } | |
378 | ||
a118cfdf | 379 | static struct dentry *hypfs_create_update_file(struct dentry *dir) |
24bbb1fa MH |
380 | { |
381 | struct dentry *dentry; | |
382 | ||
a118cfdf | 383 | dentry = hypfs_create_file(dir, "update", NULL, |
24bbb1fa MH |
384 | S_IFREG | UPDATE_FILE_MODE); |
385 | /* | |
386 | * We do not put the update file on the 'delete' list with | |
387 | * hypfs_add_dentry(), since it should not be removed when the tree | |
388 | * is updated. | |
389 | */ | |
390 | return dentry; | |
391 | } | |
392 | ||
a118cfdf | 393 | struct dentry *hypfs_create_u64(struct dentry *dir, |
24bbb1fa MH |
394 | const char *name, __u64 value) |
395 | { | |
396 | char *buffer; | |
397 | char tmp[TMP_SIZE]; | |
398 | struct dentry *dentry; | |
399 | ||
ad2a5d8e | 400 | snprintf(tmp, TMP_SIZE, "%llu\n", (unsigned long long int)value); |
24bbb1fa MH |
401 | buffer = kstrdup(tmp, GFP_KERNEL); |
402 | if (!buffer) | |
403 | return ERR_PTR(-ENOMEM); | |
404 | dentry = | |
a118cfdf | 405 | hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE); |
24bbb1fa MH |
406 | if (IS_ERR(dentry)) { |
407 | kfree(buffer); | |
408 | return ERR_PTR(-ENOMEM); | |
409 | } | |
410 | hypfs_add_dentry(dentry); | |
411 | return dentry; | |
412 | } | |
413 | ||
a118cfdf | 414 | struct dentry *hypfs_create_str(struct dentry *dir, |
24bbb1fa MH |
415 | const char *name, char *string) |
416 | { | |
417 | char *buffer; | |
418 | struct dentry *dentry; | |
419 | ||
420 | buffer = kmalloc(strlen(string) + 2, GFP_KERNEL); | |
421 | if (!buffer) | |
422 | return ERR_PTR(-ENOMEM); | |
423 | sprintf(buffer, "%s\n", string); | |
424 | dentry = | |
a118cfdf | 425 | hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE); |
24bbb1fa MH |
426 | if (IS_ERR(dentry)) { |
427 | kfree(buffer); | |
428 | return ERR_PTR(-ENOMEM); | |
429 | } | |
430 | hypfs_add_dentry(dentry); | |
431 | return dentry; | |
432 | } | |
433 | ||
5dfe4c96 | 434 | static const struct file_operations hypfs_file_ops = { |
24bbb1fa MH |
435 | .open = hypfs_open, |
436 | .release = hypfs_release, | |
a457ac28 AV |
437 | .read_iter = hypfs_read_iter, |
438 | .write_iter = hypfs_write_iter, | |
6038f373 | 439 | .llseek = no_llseek, |
24bbb1fa MH |
440 | }; |
441 | ||
442 | static struct file_system_type hypfs_type = { | |
443 | .owner = THIS_MODULE, | |
444 | .name = "s390_hypfs", | |
fc14f2fe | 445 | .mount = hypfs_mount, |
24bbb1fa MH |
446 | .kill_sb = hypfs_kill_super |
447 | }; | |
448 | ||
b87221de | 449 | static const struct super_operations hypfs_s_ops = { |
24bbb1fa | 450 | .statfs = simple_statfs, |
b69257f2 | 451 | .evict_inode = hypfs_evict_inode, |
b01af5ba | 452 | .show_options = hypfs_show_options, |
24bbb1fa MH |
453 | }; |
454 | ||
24bbb1fa MH |
455 | static int __init hypfs_init(void) |
456 | { | |
457 | int rc; | |
458 | ||
2fcb3686 MH |
459 | rc = hypfs_dbfs_init(); |
460 | if (rc) | |
461 | return rc; | |
57b28f66 MH |
462 | if (hypfs_diag_init()) { |
463 | rc = -ENODATA; | |
2fcb3686 | 464 | goto fail_dbfs_exit; |
57b28f66 MH |
465 | } |
466 | if (hypfs_vm_init()) { | |
467 | rc = -ENODATA; | |
468 | goto fail_hypfs_diag_exit; | |
24bbb1fa | 469 | } |
07be0382 MS |
470 | if (hypfs_sprp_init()) { |
471 | rc = -ENODATA; | |
472 | goto fail_hypfs_vm_exit; | |
473 | } | |
34c0dad7 MH |
474 | if (hypfs_diag0c_init()) { |
475 | rc = -ENODATA; | |
476 | goto fail_hypfs_sprp_exit; | |
477 | } | |
f9bb4882 EB |
478 | rc = sysfs_create_mount_point(hypervisor_kobj, "s390"); |
479 | if (rc) | |
34c0dad7 | 480 | goto fail_hypfs_diag0c_exit; |
24bbb1fa MH |
481 | rc = register_filesystem(&hypfs_type); |
482 | if (rc) | |
483 | goto fail_filesystem; | |
484 | return 0; | |
485 | ||
486 | fail_filesystem: | |
f9bb4882 | 487 | sysfs_remove_mount_point(hypervisor_kobj, "s390"); |
34c0dad7 MH |
488 | fail_hypfs_diag0c_exit: |
489 | hypfs_diag0c_exit(); | |
07be0382 MS |
490 | fail_hypfs_sprp_exit: |
491 | hypfs_sprp_exit(); | |
57b28f66 MH |
492 | fail_hypfs_vm_exit: |
493 | hypfs_vm_exit(); | |
494 | fail_hypfs_diag_exit: | |
495 | hypfs_diag_exit(); | |
2fcb3686 MH |
496 | fail_dbfs_exit: |
497 | hypfs_dbfs_exit(); | |
f55495ba | 498 | pr_err("Initialization of hypfs failed with rc=%i\n", rc); |
24bbb1fa MH |
499 | return rc; |
500 | } | |
cee672e1 | 501 | device_initcall(hypfs_init) |