Commit | Line | Data |
---|---|---|
24bbb1fa | 1 | /* |
24bbb1fa MH |
2 | * Hypervisor filesystem for Linux on s390. |
3 | * | |
f55495ba | 4 | * Copyright IBM Corp. 2006, 2008 |
24bbb1fa MH |
5 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
6 | */ | |
7 | ||
f55495ba MH |
8 | #define KMSG_COMPONENT "hypfs" |
9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
10 | ||
24bbb1fa MH |
11 | #include <linux/types.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/namei.h> | |
15 | #include <linux/vfs.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
24bbb1fa | 17 | #include <linux/pagemap.h> |
24bbb1fa MH |
18 | #include <linux/time.h> |
19 | #include <linux/parser.h> | |
20 | #include <linux/sysfs.h> | |
21 | #include <linux/module.h> | |
b01af5ba MH |
22 | #include <linux/seq_file.h> |
23 | #include <linux/mount.h> | |
a27bb332 | 24 | #include <linux/aio.h> |
24bbb1fa MH |
25 | #include <asm/ebcdic.h> |
26 | #include "hypfs.h" | |
24bbb1fa MH |
27 | |
28 | #define HYPFS_MAGIC 0x687970 /* ASCII 'hyp' */ | |
29 | #define TMP_SIZE 64 /* size of temporary buffers */ | |
30 | ||
a118cfdf | 31 | static struct dentry *hypfs_create_update_file(struct dentry *dir); |
24bbb1fa MH |
32 | |
33 | struct hypfs_sb_info { | |
6a62a216 EB |
34 | kuid_t uid; /* uid used for files and dirs */ |
35 | kgid_t gid; /* gid used for files and dirs */ | |
24bbb1fa MH |
36 | struct dentry *update_file; /* file to trigger update */ |
37 | time_t last_update; /* last update time in secs since 1970 */ | |
38 | struct mutex lock; /* lock to protect update process */ | |
39 | }; | |
40 | ||
5dfe4c96 | 41 | static const struct file_operations hypfs_file_ops; |
24bbb1fa | 42 | static struct file_system_type hypfs_type; |
b87221de | 43 | static const struct super_operations hypfs_s_ops; |
24bbb1fa MH |
44 | |
45 | /* start of list of all dentries, which have to be deleted on update */ | |
46 | static struct dentry *hypfs_last_dentry; | |
47 | ||
48 | static void hypfs_update_update(struct super_block *sb) | |
49 | { | |
50 | struct hypfs_sb_info *sb_info = sb->s_fs_info; | |
51 | struct inode *inode = sb_info->update_file->d_inode; | |
52 | ||
53 | sb_info->last_update = get_seconds(); | |
54 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
55 | } | |
56 | ||
57 | /* directory tree removal functions */ | |
58 | ||
59 | static void hypfs_add_dentry(struct dentry *dentry) | |
60 | { | |
61 | dentry->d_fsdata = hypfs_last_dentry; | |
62 | hypfs_last_dentry = dentry; | |
63 | } | |
64 | ||
9b5a03e1 MH |
65 | static inline int hypfs_positive(struct dentry *dentry) |
66 | { | |
67 | return dentry->d_inode && !d_unhashed(dentry); | |
68 | } | |
69 | ||
24bbb1fa MH |
70 | static void hypfs_remove(struct dentry *dentry) |
71 | { | |
72 | struct dentry *parent; | |
73 | ||
74 | parent = dentry->d_parent; | |
9b5a03e1 MH |
75 | mutex_lock(&parent->d_inode->i_mutex); |
76 | if (hypfs_positive(dentry)) { | |
77 | if (S_ISDIR(dentry->d_inode->i_mode)) | |
78 | simple_rmdir(parent->d_inode, dentry); | |
79 | else | |
80 | simple_unlink(parent->d_inode, dentry); | |
81 | } | |
24bbb1fa MH |
82 | d_delete(dentry); |
83 | dput(dentry); | |
9b5a03e1 | 84 | mutex_unlock(&parent->d_inode->i_mutex); |
24bbb1fa MH |
85 | } |
86 | ||
87 | static void hypfs_delete_tree(struct dentry *root) | |
88 | { | |
89 | while (hypfs_last_dentry) { | |
90 | struct dentry *next_dentry; | |
91 | next_dentry = hypfs_last_dentry->d_fsdata; | |
92 | hypfs_remove(hypfs_last_dentry); | |
93 | hypfs_last_dentry = next_dentry; | |
94 | } | |
95 | } | |
96 | ||
fec0ebae | 97 | static struct inode *hypfs_make_inode(struct super_block *sb, umode_t mode) |
24bbb1fa MH |
98 | { |
99 | struct inode *ret = new_inode(sb); | |
100 | ||
101 | if (ret) { | |
102 | struct hypfs_sb_info *hypfs_info = sb->s_fs_info; | |
c960bec4 | 103 | ret->i_ino = get_next_ino(); |
24bbb1fa MH |
104 | ret->i_mode = mode; |
105 | ret->i_uid = hypfs_info->uid; | |
106 | ret->i_gid = hypfs_info->gid; | |
24bbb1fa | 107 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
fec0ebae | 108 | if (S_ISDIR(mode)) |
bfe86848 | 109 | set_nlink(ret, 2); |
24bbb1fa MH |
110 | } |
111 | return ret; | |
112 | } | |
113 | ||
b69257f2 | 114 | static void hypfs_evict_inode(struct inode *inode) |
24bbb1fa | 115 | { |
dbd5768f | 116 | clear_inode(inode); |
8e18e294 | 117 | kfree(inode->i_private); |
24bbb1fa MH |
118 | } |
119 | ||
120 | static int hypfs_open(struct inode *inode, struct file *filp) | |
121 | { | |
496ad9aa | 122 | char *data = file_inode(filp)->i_private; |
24bbb1fa MH |
123 | struct hypfs_sb_info *fs_info; |
124 | ||
125 | if (filp->f_mode & FMODE_WRITE) { | |
126 | if (!(inode->i_mode & S_IWUGO)) | |
127 | return -EACCES; | |
128 | } | |
129 | if (filp->f_mode & FMODE_READ) { | |
130 | if (!(inode->i_mode & S_IRUGO)) | |
131 | return -EACCES; | |
132 | } | |
133 | ||
134 | fs_info = inode->i_sb->s_fs_info; | |
135 | if(data) { | |
136 | mutex_lock(&fs_info->lock); | |
137 | filp->private_data = kstrdup(data, GFP_KERNEL); | |
138 | if (!filp->private_data) { | |
139 | mutex_unlock(&fs_info->lock); | |
140 | return -ENOMEM; | |
141 | } | |
142 | mutex_unlock(&fs_info->lock); | |
143 | } | |
58ea91c0 | 144 | return nonseekable_open(inode, filp); |
24bbb1fa MH |
145 | } |
146 | ||
027445c3 BP |
147 | static ssize_t hypfs_aio_read(struct kiocb *iocb, const struct iovec *iov, |
148 | unsigned long nr_segs, loff_t offset) | |
24bbb1fa MH |
149 | { |
150 | char *data; | |
a29591c4 | 151 | ssize_t ret; |
24bbb1fa | 152 | struct file *filp = iocb->ki_filp; |
027445c3 BP |
153 | /* XXX: temporary */ |
154 | char __user *buf = iov[0].iov_base; | |
155 | size_t count = iov[0].iov_len; | |
156 | ||
a29591c4 AM |
157 | if (nr_segs != 1) |
158 | return -EINVAL; | |
24bbb1fa MH |
159 | |
160 | data = filp->private_data; | |
a29591c4 AM |
161 | ret = simple_read_from_buffer(buf, count, &offset, data, strlen(data)); |
162 | if (ret <= 0) | |
163 | return ret; | |
164 | ||
165 | iocb->ki_pos += ret; | |
24bbb1fa | 166 | file_accessed(filp); |
a29591c4 AM |
167 | |
168 | return ret; | |
24bbb1fa | 169 | } |
027445c3 BP |
170 | static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, |
171 | unsigned long nr_segs, loff_t offset) | |
24bbb1fa MH |
172 | { |
173 | int rc; | |
6131ffaa AV |
174 | struct super_block *sb = file_inode(iocb->ki_filp)->i_sb; |
175 | struct hypfs_sb_info *fs_info = sb->s_fs_info; | |
027445c3 | 176 | size_t count = iov_length(iov, nr_segs); |
24bbb1fa | 177 | |
24bbb1fa MH |
178 | /* |
179 | * Currently we only allow one update per second for two reasons: | |
180 | * 1. diag 204 is VERY expensive | |
181 | * 2. If several processes do updates in parallel and then read the | |
182 | * hypfs data, the likelihood of collisions is reduced, if we restrict | |
183 | * the minimum update interval. A collision occurs, if during the | |
184 | * data gathering of one process another process triggers an update | |
185 | * If the first process wants to ensure consistent data, it has | |
186 | * to restart data collection in this case. | |
187 | */ | |
188 | mutex_lock(&fs_info->lock); | |
189 | if (fs_info->last_update == get_seconds()) { | |
190 | rc = -EBUSY; | |
191 | goto out; | |
192 | } | |
193 | hypfs_delete_tree(sb->s_root); | |
31cb4bd3 | 194 | if (MACHINE_IS_VM) |
f78e41e3 | 195 | rc = hypfs_vm_create_files(sb->s_root); |
31cb4bd3 | 196 | else |
e334cf4f | 197 | rc = hypfs_diag_create_files(sb->s_root); |
24bbb1fa | 198 | if (rc) { |
f55495ba | 199 | pr_err("Updating the hypfs tree failed\n"); |
24bbb1fa MH |
200 | hypfs_delete_tree(sb->s_root); |
201 | goto out; | |
202 | } | |
203 | hypfs_update_update(sb); | |
204 | rc = count; | |
205 | out: | |
206 | mutex_unlock(&fs_info->lock); | |
207 | return rc; | |
208 | } | |
209 | ||
210 | static int hypfs_release(struct inode *inode, struct file *filp) | |
211 | { | |
212 | kfree(filp->private_data); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | enum { opt_uid, opt_gid, opt_err }; | |
217 | ||
a447c093 | 218 | static const match_table_t hypfs_tokens = { |
24bbb1fa MH |
219 | {opt_uid, "uid=%u"}, |
220 | {opt_gid, "gid=%u"}, | |
221 | {opt_err, NULL} | |
222 | }; | |
223 | ||
224 | static int hypfs_parse_options(char *options, struct super_block *sb) | |
225 | { | |
226 | char *str; | |
227 | substring_t args[MAX_OPT_ARGS]; | |
6a62a216 EB |
228 | kuid_t uid; |
229 | kgid_t gid; | |
24bbb1fa MH |
230 | |
231 | if (!options) | |
232 | return 0; | |
233 | while ((str = strsep(&options, ",")) != NULL) { | |
234 | int token, option; | |
235 | struct hypfs_sb_info *hypfs_info = sb->s_fs_info; | |
236 | ||
237 | if (!*str) | |
238 | continue; | |
239 | token = match_token(str, hypfs_tokens, args); | |
240 | switch (token) { | |
241 | case opt_uid: | |
242 | if (match_int(&args[0], &option)) | |
243 | return -EINVAL; | |
6a62a216 EB |
244 | uid = make_kuid(current_user_ns(), option); |
245 | if (!uid_valid(uid)) | |
246 | return -EINVAL; | |
247 | hypfs_info->uid = uid; | |
24bbb1fa MH |
248 | break; |
249 | case opt_gid: | |
250 | if (match_int(&args[0], &option)) | |
251 | return -EINVAL; | |
6a62a216 EB |
252 | gid = make_kgid(current_user_ns(), option); |
253 | if (!gid_valid(gid)) | |
254 | return -EINVAL; | |
255 | hypfs_info->gid = gid; | |
24bbb1fa MH |
256 | break; |
257 | case opt_err: | |
258 | default: | |
f55495ba | 259 | pr_err("%s is not a valid mount option\n", str); |
24bbb1fa MH |
260 | return -EINVAL; |
261 | } | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
34c80b1d | 266 | static int hypfs_show_options(struct seq_file *s, struct dentry *root) |
b01af5ba | 267 | { |
34c80b1d | 268 | struct hypfs_sb_info *hypfs_info = root->d_sb->s_fs_info; |
b01af5ba | 269 | |
6a62a216 EB |
270 | seq_printf(s, ",uid=%u", from_kuid_munged(&init_user_ns, hypfs_info->uid)); |
271 | seq_printf(s, ",gid=%u", from_kgid_munged(&init_user_ns, hypfs_info->gid)); | |
b01af5ba MH |
272 | return 0; |
273 | } | |
274 | ||
24bbb1fa MH |
275 | static int hypfs_fill_super(struct super_block *sb, void *data, int silent) |
276 | { | |
277 | struct inode *root_inode; | |
278 | struct dentry *root_dentry; | |
279 | int rc = 0; | |
280 | struct hypfs_sb_info *sbi; | |
281 | ||
282 | sbi = kzalloc(sizeof(struct hypfs_sb_info), GFP_KERNEL); | |
283 | if (!sbi) | |
284 | return -ENOMEM; | |
285 | mutex_init(&sbi->lock); | |
e5423705 DH |
286 | sbi->uid = current_uid(); |
287 | sbi->gid = current_gid(); | |
24bbb1fa MH |
288 | sb->s_fs_info = sbi; |
289 | sb->s_blocksize = PAGE_CACHE_SIZE; | |
290 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
291 | sb->s_magic = HYPFS_MAGIC; | |
292 | sb->s_op = &hypfs_s_ops; | |
f1771ffa AV |
293 | if (hypfs_parse_options(data, sb)) |
294 | return -EINVAL; | |
24bbb1fa | 295 | root_inode = hypfs_make_inode(sb, S_IFDIR | 0755); |
f1771ffa AV |
296 | if (!root_inode) |
297 | return -ENOMEM; | |
24bbb1fa MH |
298 | root_inode->i_op = &simple_dir_inode_operations; |
299 | root_inode->i_fop = &simple_dir_operations; | |
48fde701 AV |
300 | sb->s_root = root_dentry = d_make_root(root_inode); |
301 | if (!root_dentry) | |
f1771ffa | 302 | return -ENOMEM; |
31cb4bd3 | 303 | if (MACHINE_IS_VM) |
f78e41e3 | 304 | rc = hypfs_vm_create_files(root_dentry); |
31cb4bd3 | 305 | else |
e334cf4f | 306 | rc = hypfs_diag_create_files(root_dentry); |
24bbb1fa | 307 | if (rc) |
f1771ffa | 308 | return rc; |
a118cfdf | 309 | sbi->update_file = hypfs_create_update_file(root_dentry); |
f1771ffa AV |
310 | if (IS_ERR(sbi->update_file)) |
311 | return PTR_ERR(sbi->update_file); | |
24bbb1fa | 312 | hypfs_update_update(sb); |
f55495ba | 313 | pr_info("Hypervisor filesystem mounted\n"); |
24bbb1fa | 314 | return 0; |
24bbb1fa MH |
315 | } |
316 | ||
fc14f2fe AV |
317 | static struct dentry *hypfs_mount(struct file_system_type *fst, int flags, |
318 | const char *devname, void *data) | |
24bbb1fa | 319 | { |
fc14f2fe | 320 | return mount_single(fst, flags, data, hypfs_fill_super); |
24bbb1fa MH |
321 | } |
322 | ||
323 | static void hypfs_kill_super(struct super_block *sb) | |
324 | { | |
325 | struct hypfs_sb_info *sb_info = sb->s_fs_info; | |
326 | ||
f1771ffa | 327 | if (sb->s_root) |
388c571c | 328 | hypfs_delete_tree(sb->s_root); |
f1771ffa | 329 | if (sb_info->update_file) |
388c571c | 330 | hypfs_remove(sb_info->update_file); |
f1771ffa AV |
331 | kfree(sb->s_fs_info); |
332 | sb->s_fs_info = NULL; | |
24bbb1fa MH |
333 | kill_litter_super(sb); |
334 | } | |
335 | ||
a118cfdf | 336 | static struct dentry *hypfs_create_file(struct dentry *parent, const char *name, |
fec0ebae | 337 | char *data, umode_t mode) |
24bbb1fa MH |
338 | { |
339 | struct dentry *dentry; | |
340 | struct inode *inode; | |
24bbb1fa | 341 | |
9b5a03e1 | 342 | mutex_lock(&parent->d_inode->i_mutex); |
24bbb1fa | 343 | dentry = lookup_one_len(name, parent, strlen(name)); |
9b5a03e1 MH |
344 | if (IS_ERR(dentry)) { |
345 | dentry = ERR_PTR(-ENOMEM); | |
346 | goto fail; | |
347 | } | |
a118cfdf | 348 | inode = hypfs_make_inode(parent->d_sb, mode); |
24bbb1fa MH |
349 | if (!inode) { |
350 | dput(dentry); | |
9b5a03e1 MH |
351 | dentry = ERR_PTR(-ENOMEM); |
352 | goto fail; | |
24bbb1fa | 353 | } |
fec0ebae | 354 | if (S_ISREG(mode)) { |
24bbb1fa MH |
355 | inode->i_fop = &hypfs_file_ops; |
356 | if (data) | |
357 | inode->i_size = strlen(data); | |
358 | else | |
359 | inode->i_size = 0; | |
fec0ebae | 360 | } else if (S_ISDIR(mode)) { |
24bbb1fa MH |
361 | inode->i_op = &simple_dir_inode_operations; |
362 | inode->i_fop = &simple_dir_operations; | |
6d6b77f1 | 363 | inc_nlink(parent->d_inode); |
24bbb1fa MH |
364 | } else |
365 | BUG(); | |
8e18e294 | 366 | inode->i_private = data; |
24bbb1fa MH |
367 | d_instantiate(dentry, inode); |
368 | dget(dentry); | |
9b5a03e1 MH |
369 | fail: |
370 | mutex_unlock(&parent->d_inode->i_mutex); | |
24bbb1fa MH |
371 | return dentry; |
372 | } | |
373 | ||
a118cfdf | 374 | struct dentry *hypfs_mkdir(struct dentry *parent, const char *name) |
24bbb1fa MH |
375 | { |
376 | struct dentry *dentry; | |
377 | ||
a118cfdf | 378 | dentry = hypfs_create_file(parent, name, NULL, S_IFDIR | DIR_MODE); |
24bbb1fa MH |
379 | if (IS_ERR(dentry)) |
380 | return dentry; | |
381 | hypfs_add_dentry(dentry); | |
24bbb1fa MH |
382 | return dentry; |
383 | } | |
384 | ||
a118cfdf | 385 | static struct dentry *hypfs_create_update_file(struct dentry *dir) |
24bbb1fa MH |
386 | { |
387 | struct dentry *dentry; | |
388 | ||
a118cfdf | 389 | dentry = hypfs_create_file(dir, "update", NULL, |
24bbb1fa MH |
390 | S_IFREG | UPDATE_FILE_MODE); |
391 | /* | |
392 | * We do not put the update file on the 'delete' list with | |
393 | * hypfs_add_dentry(), since it should not be removed when the tree | |
394 | * is updated. | |
395 | */ | |
396 | return dentry; | |
397 | } | |
398 | ||
a118cfdf | 399 | struct dentry *hypfs_create_u64(struct dentry *dir, |
24bbb1fa MH |
400 | const char *name, __u64 value) |
401 | { | |
402 | char *buffer; | |
403 | char tmp[TMP_SIZE]; | |
404 | struct dentry *dentry; | |
405 | ||
ad2a5d8e | 406 | snprintf(tmp, TMP_SIZE, "%llu\n", (unsigned long long int)value); |
24bbb1fa MH |
407 | buffer = kstrdup(tmp, GFP_KERNEL); |
408 | if (!buffer) | |
409 | return ERR_PTR(-ENOMEM); | |
410 | dentry = | |
a118cfdf | 411 | hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE); |
24bbb1fa MH |
412 | if (IS_ERR(dentry)) { |
413 | kfree(buffer); | |
414 | return ERR_PTR(-ENOMEM); | |
415 | } | |
416 | hypfs_add_dentry(dentry); | |
417 | return dentry; | |
418 | } | |
419 | ||
a118cfdf | 420 | struct dentry *hypfs_create_str(struct dentry *dir, |
24bbb1fa MH |
421 | const char *name, char *string) |
422 | { | |
423 | char *buffer; | |
424 | struct dentry *dentry; | |
425 | ||
426 | buffer = kmalloc(strlen(string) + 2, GFP_KERNEL); | |
427 | if (!buffer) | |
428 | return ERR_PTR(-ENOMEM); | |
429 | sprintf(buffer, "%s\n", string); | |
430 | dentry = | |
a118cfdf | 431 | hypfs_create_file(dir, name, buffer, S_IFREG | REG_FILE_MODE); |
24bbb1fa MH |
432 | if (IS_ERR(dentry)) { |
433 | kfree(buffer); | |
434 | return ERR_PTR(-ENOMEM); | |
435 | } | |
436 | hypfs_add_dentry(dentry); | |
437 | return dentry; | |
438 | } | |
439 | ||
5dfe4c96 | 440 | static const struct file_operations hypfs_file_ops = { |
24bbb1fa MH |
441 | .open = hypfs_open, |
442 | .release = hypfs_release, | |
443 | .read = do_sync_read, | |
444 | .write = do_sync_write, | |
445 | .aio_read = hypfs_aio_read, | |
446 | .aio_write = hypfs_aio_write, | |
6038f373 | 447 | .llseek = no_llseek, |
24bbb1fa MH |
448 | }; |
449 | ||
450 | static struct file_system_type hypfs_type = { | |
451 | .owner = THIS_MODULE, | |
452 | .name = "s390_hypfs", | |
fc14f2fe | 453 | .mount = hypfs_mount, |
24bbb1fa MH |
454 | .kill_sb = hypfs_kill_super |
455 | }; | |
7f78e035 | 456 | MODULE_ALIAS_FS("s390_hypfs"); |
24bbb1fa | 457 | |
b87221de | 458 | static const struct super_operations hypfs_s_ops = { |
24bbb1fa | 459 | .statfs = simple_statfs, |
b69257f2 | 460 | .evict_inode = hypfs_evict_inode, |
b01af5ba | 461 | .show_options = hypfs_show_options, |
24bbb1fa MH |
462 | }; |
463 | ||
9b477705 | 464 | static struct kobject *s390_kobj; |
24bbb1fa MH |
465 | |
466 | static int __init hypfs_init(void) | |
467 | { | |
468 | int rc; | |
469 | ||
2fcb3686 MH |
470 | rc = hypfs_dbfs_init(); |
471 | if (rc) | |
472 | return rc; | |
57b28f66 MH |
473 | if (hypfs_diag_init()) { |
474 | rc = -ENODATA; | |
2fcb3686 | 475 | goto fail_dbfs_exit; |
57b28f66 MH |
476 | } |
477 | if (hypfs_vm_init()) { | |
478 | rc = -ENODATA; | |
479 | goto fail_hypfs_diag_exit; | |
24bbb1fa | 480 | } |
9b477705 GKH |
481 | s390_kobj = kobject_create_and_add("s390", hypervisor_kobj); |
482 | if (!s390_kobj) { | |
a419aef8 | 483 | rc = -ENOMEM; |
57b28f66 | 484 | goto fail_hypfs_vm_exit; |
9b477705 | 485 | } |
24bbb1fa MH |
486 | rc = register_filesystem(&hypfs_type); |
487 | if (rc) | |
488 | goto fail_filesystem; | |
489 | return 0; | |
490 | ||
491 | fail_filesystem: | |
38a382ae | 492 | kobject_put(s390_kobj); |
57b28f66 MH |
493 | fail_hypfs_vm_exit: |
494 | hypfs_vm_exit(); | |
495 | fail_hypfs_diag_exit: | |
496 | hypfs_diag_exit(); | |
2fcb3686 MH |
497 | fail_dbfs_exit: |
498 | hypfs_dbfs_exit(); | |
f55495ba | 499 | pr_err("Initialization of hypfs failed with rc=%i\n", rc); |
24bbb1fa MH |
500 | return rc; |
501 | } | |
502 | ||
503 | static void __exit hypfs_exit(void) | |
504 | { | |
57b28f66 MH |
505 | hypfs_diag_exit(); |
506 | hypfs_vm_exit(); | |
2fcb3686 | 507 | hypfs_dbfs_exit(); |
24bbb1fa | 508 | unregister_filesystem(&hypfs_type); |
38a382ae | 509 | kobject_put(s390_kobj); |
24bbb1fa MH |
510 | } |
511 | ||
512 | module_init(hypfs_init) | |
513 | module_exit(hypfs_exit) | |
514 | ||
515 | MODULE_LICENSE("GPL"); | |
516 | MODULE_AUTHOR("Michael Holzheu <holzheu@de.ibm.com>"); | |
517 | MODULE_DESCRIPTION("s390 Hypervisor Filesystem"); |