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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5db11c21 MM |
2 | /* |
3 | * (C) 2001 Clemson University and The University of Chicago | |
4 | * | |
5 | * See COPYING in top-level directory. | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Linux VFS inode operations. | |
10 | */ | |
11 | ||
2f8b5444 | 12 | #include <linux/bvec.h> |
5db11c21 | 13 | #include "protocol.h" |
575e9461 MM |
14 | #include "orangefs-kernel.h" |
15 | #include "orangefs-bufmap.h" | |
5db11c21 MM |
16 | |
17 | static int read_one_page(struct page *page) | |
18 | { | |
5db11c21 MM |
19 | int ret; |
20 | int max_block; | |
21 | ssize_t bytes_read = 0; | |
22 | struct inode *inode = page->mapping->host; | |
9f8fd53c MB |
23 | const __u32 blocksize = PAGE_SIZE; |
24 | const __u32 blockbits = PAGE_SHIFT; | |
74f68fce AV |
25 | struct iov_iter to; |
26 | struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE}; | |
27 | ||
28 | iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE); | |
5db11c21 MM |
29 | |
30 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 31 | "orangefs_readpage called with page %p\n", |
5db11c21 | 32 | page); |
5db11c21 MM |
33 | |
34 | max_block = ((inode->i_size / blocksize) + 1); | |
35 | ||
36 | if (page->index < max_block) { | |
37 | loff_t blockptr_offset = (((loff_t) page->index) << blockbits); | |
38 | ||
8bb8aefd YL |
39 | bytes_read = orangefs_inode_read(inode, |
40 | &to, | |
41 | &blockptr_offset, | |
42 | inode->i_size); | |
5db11c21 | 43 | } |
74f68fce AV |
44 | /* this will only zero remaining unread portions of the page data */ |
45 | iov_iter_zero(~0U, &to); | |
5db11c21 MM |
46 | /* takes care of potential aliasing */ |
47 | flush_dcache_page(page); | |
48 | if (bytes_read < 0) { | |
49 | ret = bytes_read; | |
50 | SetPageError(page); | |
51 | } else { | |
52 | SetPageUptodate(page); | |
53 | if (PageError(page)) | |
54 | ClearPageError(page); | |
55 | ret = 0; | |
56 | } | |
5db11c21 MM |
57 | /* unlock the page after the ->readpage() routine completes */ |
58 | unlock_page(page); | |
59 | return ret; | |
60 | } | |
61 | ||
8bb8aefd | 62 | static int orangefs_readpage(struct file *file, struct page *page) |
5db11c21 MM |
63 | { |
64 | return read_one_page(page); | |
65 | } | |
66 | ||
8bb8aefd | 67 | static int orangefs_readpages(struct file *file, |
5db11c21 MM |
68 | struct address_space *mapping, |
69 | struct list_head *pages, | |
70 | unsigned nr_pages) | |
71 | { | |
72 | int page_idx; | |
73 | int ret; | |
74 | ||
8bb8aefd | 75 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n"); |
5db11c21 MM |
76 | |
77 | for (page_idx = 0; page_idx < nr_pages; page_idx++) { | |
78 | struct page *page; | |
79 | ||
80 | page = list_entry(pages->prev, struct page, lru); | |
81 | list_del(&page->lru); | |
82 | if (!add_to_page_cache(page, | |
83 | mapping, | |
84 | page->index, | |
8a5c743e | 85 | readahead_gfp_mask(mapping))) { |
5db11c21 MM |
86 | ret = read_one_page(page); |
87 | gossip_debug(GOSSIP_INODE_DEBUG, | |
88 | "failure adding page to cache, read_one_page returned: %d\n", | |
89 | ret); | |
90 | } else { | |
09cbfeaf | 91 | put_page(page); |
5db11c21 MM |
92 | } |
93 | } | |
94 | BUG_ON(!list_empty(pages)); | |
95 | return 0; | |
96 | } | |
97 | ||
8bb8aefd | 98 | static void orangefs_invalidatepage(struct page *page, |
5db11c21 MM |
99 | unsigned int offset, |
100 | unsigned int length) | |
101 | { | |
102 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 103 | "orangefs_invalidatepage called on page %p " |
5db11c21 MM |
104 | "(offset is %u)\n", |
105 | page, | |
106 | offset); | |
107 | ||
108 | ClearPageUptodate(page); | |
109 | ClearPageMappedToDisk(page); | |
110 | return; | |
111 | ||
112 | } | |
113 | ||
8bb8aefd | 114 | static int orangefs_releasepage(struct page *page, gfp_t foo) |
5db11c21 MM |
115 | { |
116 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 117 | "orangefs_releasepage called on page %p\n", |
5db11c21 MM |
118 | page); |
119 | return 0; | |
120 | } | |
121 | ||
122 | /* | |
123 | * Having a direct_IO entry point in the address_space_operations | |
124 | * struct causes the kernel to allows us to use O_DIRECT on | |
125 | * open. Nothing will ever call this thing, but in the future we | |
126 | * will need to be able to use O_DIRECT on open in order to support | |
127 | * AIO. Modeled after NFS, they do this too. | |
128 | */ | |
3903f150 MM |
129 | |
130 | static ssize_t orangefs_direct_IO(struct kiocb *iocb, | |
131 | struct iov_iter *iter) | |
132 | { | |
133 | gossip_debug(GOSSIP_INODE_DEBUG, | |
f66debf1 AV |
134 | "orangefs_direct_IO: %pD\n", |
135 | iocb->ki_filp); | |
3903f150 MM |
136 | |
137 | return -EINVAL; | |
138 | } | |
5db11c21 | 139 | |
8bb8aefd | 140 | /** ORANGEFS2 implementation of address space operations */ |
bdd6f083 | 141 | static const struct address_space_operations orangefs_address_operations = { |
8bb8aefd YL |
142 | .readpage = orangefs_readpage, |
143 | .readpages = orangefs_readpages, | |
144 | .invalidatepage = orangefs_invalidatepage, | |
145 | .releasepage = orangefs_releasepage, | |
3903f150 | 146 | .direct_IO = orangefs_direct_IO, |
5db11c21 MM |
147 | }; |
148 | ||
8bb8aefd | 149 | static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) |
5db11c21 | 150 | { |
8bb8aefd YL |
151 | struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); |
152 | struct orangefs_kernel_op_s *new_op; | |
fecd86aa | 153 | loff_t orig_size; |
5db11c21 MM |
154 | int ret = -EINVAL; |
155 | ||
156 | gossip_debug(GOSSIP_INODE_DEBUG, | |
157 | "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", | |
158 | __func__, | |
159 | get_khandle_from_ino(inode), | |
8bb8aefd YL |
160 | &orangefs_inode->refn.khandle, |
161 | orangefs_inode->refn.fs_id, | |
5db11c21 MM |
162 | iattr->ia_size); |
163 | ||
fecd86aa | 164 | /* Ensure that we have a up to date size, so we know if it changed. */ |
68a24a6c | 165 | ret = orangefs_inode_getattr(inode, 0, 1, STATX_SIZE); |
fecd86aa MB |
166 | if (ret == -ESTALE) |
167 | ret = -EIO; | |
168 | if (ret) { | |
169 | gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", | |
170 | __func__, ret); | |
171 | return ret; | |
172 | } | |
173 | orig_size = i_size_read(inode); | |
174 | ||
5db11c21 MM |
175 | truncate_setsize(inode, iattr->ia_size); |
176 | ||
8bb8aefd | 177 | new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); |
5db11c21 MM |
178 | if (!new_op) |
179 | return -ENOMEM; | |
180 | ||
8bb8aefd | 181 | new_op->upcall.req.truncate.refn = orangefs_inode->refn; |
5db11c21 MM |
182 | new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; |
183 | ||
184 | ret = service_operation(new_op, __func__, | |
185 | get_interruptible_flag(inode)); | |
186 | ||
187 | /* | |
188 | * the truncate has no downcall members to retrieve, but | |
189 | * the status value tells us if it went through ok or not | |
190 | */ | |
191 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 192 | "orangefs: orangefs_truncate got return value of %d\n", |
5db11c21 MM |
193 | ret); |
194 | ||
195 | op_release(new_op); | |
196 | ||
197 | if (ret != 0) | |
198 | return ret; | |
199 | ||
f83140c1 | 200 | if (orig_size != i_size_read(inode)) |
5db11c21 | 201 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
5db11c21 MM |
202 | |
203 | return ret; | |
204 | } | |
205 | ||
206 | /* | |
207 | * Change attributes of an object referenced by dentry. | |
208 | */ | |
8bb8aefd | 209 | int orangefs_setattr(struct dentry *dentry, struct iattr *iattr) |
5db11c21 MM |
210 | { |
211 | int ret = -EINVAL; | |
212 | struct inode *inode = dentry->d_inode; | |
213 | ||
214 | gossip_debug(GOSSIP_INODE_DEBUG, | |
f66debf1 AV |
215 | "orangefs_setattr: called on %pd\n", |
216 | dentry); | |
5db11c21 | 217 | |
31051c85 | 218 | ret = setattr_prepare(dentry, iattr); |
5db11c21 MM |
219 | if (ret) |
220 | goto out; | |
221 | ||
53950ef5 | 222 | if (iattr->ia_valid & ATTR_SIZE) { |
8bb8aefd | 223 | ret = orangefs_setattr_size(inode, iattr); |
5db11c21 MM |
224 | if (ret) |
225 | goto out; | |
226 | } | |
227 | ||
228 | setattr_copy(inode, iattr); | |
229 | mark_inode_dirty(inode); | |
230 | ||
8bb8aefd | 231 | ret = orangefs_inode_setattr(inode, iattr); |
5db11c21 | 232 | gossip_debug(GOSSIP_INODE_DEBUG, |
8bb8aefd | 233 | "orangefs_setattr: inode_setattr returned %d\n", |
5db11c21 MM |
234 | ret); |
235 | ||
236 | if (!ret && (iattr->ia_valid & ATTR_MODE)) | |
237 | /* change mod on a file that has ACLs */ | |
238 | ret = posix_acl_chmod(inode, inode->i_mode); | |
239 | ||
240 | out: | |
8bb8aefd | 241 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret); |
5db11c21 MM |
242 | return ret; |
243 | } | |
244 | ||
245 | /* | |
246 | * Obtain attributes of an object given a dentry | |
247 | */ | |
a528d35e DH |
248 | int orangefs_getattr(const struct path *path, struct kstat *stat, |
249 | u32 request_mask, unsigned int flags) | |
5db11c21 MM |
250 | { |
251 | int ret = -ENOENT; | |
a528d35e | 252 | struct inode *inode = path->dentry->d_inode; |
8bb8aefd | 253 | struct orangefs_inode_s *orangefs_inode = NULL; |
5db11c21 MM |
254 | |
255 | gossip_debug(GOSSIP_INODE_DEBUG, | |
f66debf1 | 256 | "orangefs_getattr: called on %pd\n", |
a528d35e | 257 | path->dentry); |
5db11c21 | 258 | |
68a24a6c | 259 | ret = orangefs_inode_getattr(inode, 0, 0, request_mask); |
5db11c21 | 260 | if (ret == 0) { |
a528d35e | 261 | generic_fillattr(inode, stat); |
a7d3e78a | 262 | |
5db11c21 | 263 | /* override block size reported to stat */ |
8bb8aefd | 264 | orangefs_inode = ORANGEFS_I(inode); |
68a24a6c MB |
265 | |
266 | if (request_mask & STATX_SIZE) | |
267 | stat->result_mask = STATX_BASIC_STATS; | |
268 | else | |
269 | stat->result_mask = STATX_BASIC_STATS & | |
270 | ~STATX_SIZE; | |
5db11c21 MM |
271 | } |
272 | return ret; | |
273 | } | |
274 | ||
933287da MB |
275 | int orangefs_permission(struct inode *inode, int mask) |
276 | { | |
277 | int ret; | |
278 | ||
279 | if (mask & MAY_NOT_BLOCK) | |
280 | return -ECHILD; | |
281 | ||
282 | gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); | |
283 | ||
284 | /* Make sure the permission (and other common attrs) are up to date. */ | |
68a24a6c | 285 | ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE); |
933287da MB |
286 | if (ret < 0) |
287 | return ret; | |
288 | ||
289 | return generic_permission(inode, mask); | |
290 | } | |
291 | ||
a55f2d86 MB |
292 | int orangefs_update_time(struct inode *inode, struct timespec *time, int flags) |
293 | { | |
294 | struct iattr iattr; | |
295 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", | |
296 | get_khandle_from_ino(inode)); | |
297 | generic_update_time(inode, time, flags); | |
298 | memset(&iattr, 0, sizeof iattr); | |
299 | if (flags & S_ATIME) | |
300 | iattr.ia_valid |= ATTR_ATIME; | |
301 | if (flags & S_CTIME) | |
302 | iattr.ia_valid |= ATTR_CTIME; | |
303 | if (flags & S_MTIME) | |
304 | iattr.ia_valid |= ATTR_MTIME; | |
305 | return orangefs_inode_setattr(inode, &iattr); | |
306 | } | |
307 | ||
8bb8aefd | 308 | /* ORANGEDS2 implementation of VFS inode operations for files */ |
bdd6f083 | 309 | static const struct inode_operations orangefs_file_inode_operations = { |
8bb8aefd YL |
310 | .get_acl = orangefs_get_acl, |
311 | .set_acl = orangefs_set_acl, | |
312 | .setattr = orangefs_setattr, | |
313 | .getattr = orangefs_getattr, | |
8bb8aefd | 314 | .listxattr = orangefs_listxattr, |
933287da | 315 | .permission = orangefs_permission, |
a55f2d86 | 316 | .update_time = orangefs_update_time, |
5db11c21 MM |
317 | }; |
318 | ||
8bb8aefd | 319 | static int orangefs_init_iops(struct inode *inode) |
5db11c21 | 320 | { |
8bb8aefd | 321 | inode->i_mapping->a_ops = &orangefs_address_operations; |
5db11c21 MM |
322 | |
323 | switch (inode->i_mode & S_IFMT) { | |
324 | case S_IFREG: | |
8bb8aefd YL |
325 | inode->i_op = &orangefs_file_inode_operations; |
326 | inode->i_fop = &orangefs_file_operations; | |
5db11c21 MM |
327 | break; |
328 | case S_IFLNK: | |
8bb8aefd | 329 | inode->i_op = &orangefs_symlink_inode_operations; |
5db11c21 MM |
330 | break; |
331 | case S_IFDIR: | |
8bb8aefd YL |
332 | inode->i_op = &orangefs_dir_inode_operations; |
333 | inode->i_fop = &orangefs_dir_operations; | |
5db11c21 MM |
334 | break; |
335 | default: | |
336 | gossip_debug(GOSSIP_INODE_DEBUG, | |
337 | "%s: unsupported mode\n", | |
338 | __func__); | |
339 | return -EINVAL; | |
340 | } | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | /* | |
8bb8aefd | 346 | * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type |
5db11c21 MM |
347 | * that will be used as a hash-index from where the handle will |
348 | * be searched for in the VFS hash table of inodes. | |
349 | */ | |
8bb8aefd | 350 | static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) |
5db11c21 MM |
351 | { |
352 | if (!ref) | |
353 | return 0; | |
8bb8aefd | 354 | return orangefs_khandle_to_ino(&(ref->khandle)); |
5db11c21 MM |
355 | } |
356 | ||
357 | /* | |
358 | * Called to set up an inode from iget5_locked. | |
359 | */ | |
8bb8aefd | 360 | static int orangefs_set_inode(struct inode *inode, void *data) |
5db11c21 | 361 | { |
8bb8aefd | 362 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
a4c680a0 MB |
363 | ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; |
364 | ORANGEFS_I(inode)->refn.khandle = ref->khandle; | |
5db11c21 MM |
365 | return 0; |
366 | } | |
367 | ||
368 | /* | |
369 | * Called to determine if handles match. | |
370 | */ | |
8bb8aefd | 371 | static int orangefs_test_inode(struct inode *inode, void *data) |
5db11c21 | 372 | { |
8bb8aefd YL |
373 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
374 | struct orangefs_inode_s *orangefs_inode = NULL; | |
5db11c21 | 375 | |
8bb8aefd YL |
376 | orangefs_inode = ORANGEFS_I(inode); |
377 | return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle)) | |
378 | && orangefs_inode->refn.fs_id == ref->fs_id); | |
5db11c21 MM |
379 | } |
380 | ||
381 | /* | |
8bb8aefd | 382 | * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS |
5db11c21 MM |
383 | * file handle. |
384 | * | |
385 | * @sb: the file system super block instance. | |
8bb8aefd | 386 | * @ref: The ORANGEFS object for which we are trying to locate an inode structure. |
5db11c21 | 387 | */ |
8bb8aefd | 388 | struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref) |
5db11c21 MM |
389 | { |
390 | struct inode *inode = NULL; | |
391 | unsigned long hash; | |
392 | int error; | |
393 | ||
8bb8aefd YL |
394 | hash = orangefs_handle_hash(ref); |
395 | inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref); | |
5db11c21 MM |
396 | if (!inode || !(inode->i_state & I_NEW)) |
397 | return inode; | |
398 | ||
68a24a6c | 399 | error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL); |
5db11c21 MM |
400 | if (error) { |
401 | iget_failed(inode); | |
402 | return ERR_PTR(error); | |
403 | } | |
404 | ||
405 | inode->i_ino = hash; /* needed for stat etc */ | |
8bb8aefd | 406 | orangefs_init_iops(inode); |
5db11c21 MM |
407 | unlock_new_inode(inode); |
408 | ||
409 | gossip_debug(GOSSIP_INODE_DEBUG, | |
410 | "iget handle %pU, fsid %d hash %ld i_ino %lu\n", | |
411 | &ref->khandle, | |
412 | ref->fs_id, | |
413 | hash, | |
414 | inode->i_ino); | |
415 | ||
416 | return inode; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Allocate an inode for a newly created file and insert it into the inode hash. | |
421 | */ | |
8bb8aefd YL |
422 | struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, |
423 | int mode, dev_t dev, struct orangefs_object_kref *ref) | |
5db11c21 | 424 | { |
8bb8aefd | 425 | unsigned long hash = orangefs_handle_hash(ref); |
5db11c21 MM |
426 | struct inode *inode; |
427 | int error; | |
428 | ||
429 | gossip_debug(GOSSIP_INODE_DEBUG, | |
5253487e MM |
430 | "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", |
431 | __func__, | |
5db11c21 MM |
432 | sb, |
433 | MAJOR(dev), | |
434 | MINOR(dev), | |
435 | mode); | |
436 | ||
437 | inode = new_inode(sb); | |
438 | if (!inode) | |
439 | return NULL; | |
440 | ||
8bb8aefd | 441 | orangefs_set_inode(inode, ref); |
5db11c21 MM |
442 | inode->i_ino = hash; /* needed for stat etc */ |
443 | ||
68a24a6c | 444 | error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL); |
5db11c21 MM |
445 | if (error) |
446 | goto out_iput; | |
447 | ||
8bb8aefd | 448 | orangefs_init_iops(inode); |
5db11c21 MM |
449 | |
450 | inode->i_mode = mode; | |
451 | inode->i_uid = current_fsuid(); | |
452 | inode->i_gid = current_fsgid(); | |
078cd827 | 453 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
09cbfeaf | 454 | inode->i_size = PAGE_SIZE; |
5db11c21 MM |
455 | inode->i_rdev = dev; |
456 | ||
8bb8aefd | 457 | error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); |
5db11c21 MM |
458 | if (error < 0) |
459 | goto out_iput; | |
460 | ||
461 | gossip_debug(GOSSIP_INODE_DEBUG, | |
462 | "Initializing ACL's for inode %pU\n", | |
463 | get_khandle_from_ino(inode)); | |
8bb8aefd | 464 | orangefs_init_acl(inode, dir); |
5db11c21 MM |
465 | return inode; |
466 | ||
467 | out_iput: | |
468 | iput(inode); | |
469 | return ERR_PTR(error); | |
470 | } |