Commit | Line | Data |
---|---|---|
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; | |
09cbfeaf KS |
23 | const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */ |
24 | const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */ | |
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 YL |
140 | /** ORANGEFS2 implementation of address space operations */ |
141 | const struct address_space_operations orangefs_address_operations = { | |
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); |
a528d35e | 265 | stat->blksize = orangefs_inode->blksize; |
68a24a6c MB |
266 | |
267 | if (request_mask & STATX_SIZE) | |
268 | stat->result_mask = STATX_BASIC_STATS; | |
269 | else | |
270 | stat->result_mask = STATX_BASIC_STATS & | |
271 | ~STATX_SIZE; | |
5db11c21 MM |
272 | } |
273 | return ret; | |
274 | } | |
275 | ||
933287da MB |
276 | int orangefs_permission(struct inode *inode, int mask) |
277 | { | |
278 | int ret; | |
279 | ||
280 | if (mask & MAY_NOT_BLOCK) | |
281 | return -ECHILD; | |
282 | ||
283 | gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); | |
284 | ||
285 | /* Make sure the permission (and other common attrs) are up to date. */ | |
68a24a6c | 286 | ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE); |
933287da MB |
287 | if (ret < 0) |
288 | return ret; | |
289 | ||
290 | return generic_permission(inode, mask); | |
291 | } | |
292 | ||
a55f2d86 MB |
293 | int orangefs_update_time(struct inode *inode, struct timespec *time, int flags) |
294 | { | |
295 | struct iattr iattr; | |
296 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n", | |
297 | get_khandle_from_ino(inode)); | |
298 | generic_update_time(inode, time, flags); | |
299 | memset(&iattr, 0, sizeof iattr); | |
300 | if (flags & S_ATIME) | |
301 | iattr.ia_valid |= ATTR_ATIME; | |
302 | if (flags & S_CTIME) | |
303 | iattr.ia_valid |= ATTR_CTIME; | |
304 | if (flags & S_MTIME) | |
305 | iattr.ia_valid |= ATTR_MTIME; | |
306 | return orangefs_inode_setattr(inode, &iattr); | |
307 | } | |
308 | ||
8bb8aefd | 309 | /* ORANGEDS2 implementation of VFS inode operations for files */ |
6f3fc107 | 310 | const struct inode_operations orangefs_file_inode_operations = { |
8bb8aefd YL |
311 | .get_acl = orangefs_get_acl, |
312 | .set_acl = orangefs_set_acl, | |
313 | .setattr = orangefs_setattr, | |
314 | .getattr = orangefs_getattr, | |
8bb8aefd | 315 | .listxattr = orangefs_listxattr, |
933287da | 316 | .permission = orangefs_permission, |
a55f2d86 | 317 | .update_time = orangefs_update_time, |
5db11c21 MM |
318 | }; |
319 | ||
8bb8aefd | 320 | static int orangefs_init_iops(struct inode *inode) |
5db11c21 | 321 | { |
8bb8aefd | 322 | inode->i_mapping->a_ops = &orangefs_address_operations; |
5db11c21 MM |
323 | |
324 | switch (inode->i_mode & S_IFMT) { | |
325 | case S_IFREG: | |
8bb8aefd YL |
326 | inode->i_op = &orangefs_file_inode_operations; |
327 | inode->i_fop = &orangefs_file_operations; | |
09cbfeaf | 328 | inode->i_blkbits = PAGE_SHIFT; |
5db11c21 MM |
329 | break; |
330 | case S_IFLNK: | |
8bb8aefd | 331 | inode->i_op = &orangefs_symlink_inode_operations; |
5db11c21 MM |
332 | break; |
333 | case S_IFDIR: | |
8bb8aefd YL |
334 | inode->i_op = &orangefs_dir_inode_operations; |
335 | inode->i_fop = &orangefs_dir_operations; | |
5db11c21 MM |
336 | break; |
337 | default: | |
338 | gossip_debug(GOSSIP_INODE_DEBUG, | |
339 | "%s: unsupported mode\n", | |
340 | __func__); | |
341 | return -EINVAL; | |
342 | } | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | /* | |
8bb8aefd | 348 | * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type |
5db11c21 MM |
349 | * that will be used as a hash-index from where the handle will |
350 | * be searched for in the VFS hash table of inodes. | |
351 | */ | |
8bb8aefd | 352 | static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) |
5db11c21 MM |
353 | { |
354 | if (!ref) | |
355 | return 0; | |
8bb8aefd | 356 | return orangefs_khandle_to_ino(&(ref->khandle)); |
5db11c21 MM |
357 | } |
358 | ||
359 | /* | |
360 | * Called to set up an inode from iget5_locked. | |
361 | */ | |
8bb8aefd | 362 | static int orangefs_set_inode(struct inode *inode, void *data) |
5db11c21 | 363 | { |
8bb8aefd | 364 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
a4c680a0 MB |
365 | ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; |
366 | ORANGEFS_I(inode)->refn.khandle = ref->khandle; | |
5db11c21 MM |
367 | return 0; |
368 | } | |
369 | ||
370 | /* | |
371 | * Called to determine if handles match. | |
372 | */ | |
8bb8aefd | 373 | static int orangefs_test_inode(struct inode *inode, void *data) |
5db11c21 | 374 | { |
8bb8aefd YL |
375 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
376 | struct orangefs_inode_s *orangefs_inode = NULL; | |
5db11c21 | 377 | |
8bb8aefd YL |
378 | orangefs_inode = ORANGEFS_I(inode); |
379 | return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle)) | |
380 | && orangefs_inode->refn.fs_id == ref->fs_id); | |
5db11c21 MM |
381 | } |
382 | ||
383 | /* | |
8bb8aefd | 384 | * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS |
5db11c21 MM |
385 | * file handle. |
386 | * | |
387 | * @sb: the file system super block instance. | |
8bb8aefd | 388 | * @ref: The ORANGEFS object for which we are trying to locate an inode structure. |
5db11c21 | 389 | */ |
8bb8aefd | 390 | struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref) |
5db11c21 MM |
391 | { |
392 | struct inode *inode = NULL; | |
393 | unsigned long hash; | |
394 | int error; | |
395 | ||
8bb8aefd YL |
396 | hash = orangefs_handle_hash(ref); |
397 | inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref); | |
5db11c21 MM |
398 | if (!inode || !(inode->i_state & I_NEW)) |
399 | return inode; | |
400 | ||
68a24a6c | 401 | error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL); |
5db11c21 MM |
402 | if (error) { |
403 | iget_failed(inode); | |
404 | return ERR_PTR(error); | |
405 | } | |
406 | ||
407 | inode->i_ino = hash; /* needed for stat etc */ | |
8bb8aefd | 408 | orangefs_init_iops(inode); |
5db11c21 MM |
409 | unlock_new_inode(inode); |
410 | ||
411 | gossip_debug(GOSSIP_INODE_DEBUG, | |
412 | "iget handle %pU, fsid %d hash %ld i_ino %lu\n", | |
413 | &ref->khandle, | |
414 | ref->fs_id, | |
415 | hash, | |
416 | inode->i_ino); | |
417 | ||
418 | return inode; | |
419 | } | |
420 | ||
421 | /* | |
422 | * Allocate an inode for a newly created file and insert it into the inode hash. | |
423 | */ | |
8bb8aefd YL |
424 | struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, |
425 | int mode, dev_t dev, struct orangefs_object_kref *ref) | |
5db11c21 | 426 | { |
8bb8aefd | 427 | unsigned long hash = orangefs_handle_hash(ref); |
5db11c21 MM |
428 | struct inode *inode; |
429 | int error; | |
430 | ||
431 | gossip_debug(GOSSIP_INODE_DEBUG, | |
5253487e MM |
432 | "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", |
433 | __func__, | |
5db11c21 MM |
434 | sb, |
435 | MAJOR(dev), | |
436 | MINOR(dev), | |
437 | mode); | |
438 | ||
439 | inode = new_inode(sb); | |
440 | if (!inode) | |
441 | return NULL; | |
442 | ||
8bb8aefd | 443 | orangefs_set_inode(inode, ref); |
5db11c21 MM |
444 | inode->i_ino = hash; /* needed for stat etc */ |
445 | ||
68a24a6c | 446 | error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL); |
5db11c21 MM |
447 | if (error) |
448 | goto out_iput; | |
449 | ||
8bb8aefd | 450 | orangefs_init_iops(inode); |
5db11c21 MM |
451 | |
452 | inode->i_mode = mode; | |
453 | inode->i_uid = current_fsuid(); | |
454 | inode->i_gid = current_fsgid(); | |
078cd827 | 455 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
09cbfeaf | 456 | inode->i_size = PAGE_SIZE; |
5db11c21 MM |
457 | inode->i_rdev = dev; |
458 | ||
8bb8aefd | 459 | error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); |
5db11c21 MM |
460 | if (error < 0) |
461 | goto out_iput; | |
462 | ||
463 | gossip_debug(GOSSIP_INODE_DEBUG, | |
464 | "Initializing ACL's for inode %pU\n", | |
465 | get_khandle_from_ino(inode)); | |
8bb8aefd | 466 | orangefs_init_acl(inode, dir); |
5db11c21 MM |
467 | return inode; |
468 | ||
469 | out_iput: | |
470 | iput(inode); | |
471 | return ERR_PTR(error); | |
472 | } |