Commit | Line | Data |
---|---|---|
5db11c21 MM |
1 | /* |
2 | * (C) 2001 Clemson University and The University of Chicago | |
3 | * | |
4 | * See COPYING in top-level directory. | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Linux VFS inode operations. | |
9 | */ | |
10 | ||
11 | #include "protocol.h" | |
575e9461 MM |
12 | #include "orangefs-kernel.h" |
13 | #include "orangefs-bufmap.h" | |
5db11c21 MM |
14 | |
15 | static int read_one_page(struct page *page) | |
16 | { | |
5db11c21 MM |
17 | int ret; |
18 | int max_block; | |
19 | ssize_t bytes_read = 0; | |
20 | struct inode *inode = page->mapping->host; | |
21 | const __u32 blocksize = PAGE_CACHE_SIZE; /* inode->i_blksize */ | |
22 | const __u32 blockbits = PAGE_CACHE_SHIFT; /* inode->i_blkbits */ | |
74f68fce AV |
23 | struct iov_iter to; |
24 | struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE}; | |
25 | ||
26 | iov_iter_bvec(&to, ITER_BVEC | READ, &bv, 1, PAGE_SIZE); | |
5db11c21 MM |
27 | |
28 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 29 | "orangefs_readpage called with page %p\n", |
5db11c21 | 30 | page); |
5db11c21 MM |
31 | |
32 | max_block = ((inode->i_size / blocksize) + 1); | |
33 | ||
34 | if (page->index < max_block) { | |
35 | loff_t blockptr_offset = (((loff_t) page->index) << blockbits); | |
36 | ||
8bb8aefd YL |
37 | bytes_read = orangefs_inode_read(inode, |
38 | &to, | |
39 | &blockptr_offset, | |
40 | inode->i_size); | |
5db11c21 | 41 | } |
74f68fce AV |
42 | /* this will only zero remaining unread portions of the page data */ |
43 | iov_iter_zero(~0U, &to); | |
5db11c21 MM |
44 | /* takes care of potential aliasing */ |
45 | flush_dcache_page(page); | |
46 | if (bytes_read < 0) { | |
47 | ret = bytes_read; | |
48 | SetPageError(page); | |
49 | } else { | |
50 | SetPageUptodate(page); | |
51 | if (PageError(page)) | |
52 | ClearPageError(page); | |
53 | ret = 0; | |
54 | } | |
5db11c21 MM |
55 | /* unlock the page after the ->readpage() routine completes */ |
56 | unlock_page(page); | |
57 | return ret; | |
58 | } | |
59 | ||
8bb8aefd | 60 | static int orangefs_readpage(struct file *file, struct page *page) |
5db11c21 MM |
61 | { |
62 | return read_one_page(page); | |
63 | } | |
64 | ||
8bb8aefd | 65 | static int orangefs_readpages(struct file *file, |
5db11c21 MM |
66 | struct address_space *mapping, |
67 | struct list_head *pages, | |
68 | unsigned nr_pages) | |
69 | { | |
70 | int page_idx; | |
71 | int ret; | |
72 | ||
8bb8aefd | 73 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n"); |
5db11c21 MM |
74 | |
75 | for (page_idx = 0; page_idx < nr_pages; page_idx++) { | |
76 | struct page *page; | |
77 | ||
78 | page = list_entry(pages->prev, struct page, lru); | |
79 | list_del(&page->lru); | |
80 | if (!add_to_page_cache(page, | |
81 | mapping, | |
82 | page->index, | |
83 | GFP_KERNEL)) { | |
84 | ret = read_one_page(page); | |
85 | gossip_debug(GOSSIP_INODE_DEBUG, | |
86 | "failure adding page to cache, read_one_page returned: %d\n", | |
87 | ret); | |
88 | } else { | |
89 | page_cache_release(page); | |
90 | } | |
91 | } | |
92 | BUG_ON(!list_empty(pages)); | |
93 | return 0; | |
94 | } | |
95 | ||
8bb8aefd | 96 | static void orangefs_invalidatepage(struct page *page, |
5db11c21 MM |
97 | unsigned int offset, |
98 | unsigned int length) | |
99 | { | |
100 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 101 | "orangefs_invalidatepage called on page %p " |
5db11c21 MM |
102 | "(offset is %u)\n", |
103 | page, | |
104 | offset); | |
105 | ||
106 | ClearPageUptodate(page); | |
107 | ClearPageMappedToDisk(page); | |
108 | return; | |
109 | ||
110 | } | |
111 | ||
8bb8aefd | 112 | static int orangefs_releasepage(struct page *page, gfp_t foo) |
5db11c21 MM |
113 | { |
114 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 115 | "orangefs_releasepage called on page %p\n", |
5db11c21 MM |
116 | page); |
117 | return 0; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Having a direct_IO entry point in the address_space_operations | |
122 | * struct causes the kernel to allows us to use O_DIRECT on | |
123 | * open. Nothing will ever call this thing, but in the future we | |
124 | * will need to be able to use O_DIRECT on open in order to support | |
125 | * AIO. Modeled after NFS, they do this too. | |
126 | */ | |
127 | /* | |
575e9461 | 128 | * static ssize_t orangefs_direct_IO(int rw, |
54804949 MM |
129 | * struct kiocb *iocb, |
130 | * struct iov_iter *iter, | |
131 | * loff_t offset) | |
132 | *{ | |
133 | * gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 134 | * "orangefs_direct_IO: %s\n", |
54804949 MM |
135 | * iocb->ki_filp->f_path.dentry->d_name.name); |
136 | * | |
137 | * return -EINVAL; | |
138 | *} | |
139 | */ | |
5db11c21 | 140 | |
8bb8aefd YL |
141 | struct backing_dev_info orangefs_backing_dev_info = { |
142 | .name = "orangefs", | |
5db11c21 MM |
143 | .ra_pages = 0, |
144 | .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK, | |
145 | }; | |
146 | ||
8bb8aefd YL |
147 | /** ORANGEFS2 implementation of address space operations */ |
148 | const struct address_space_operations orangefs_address_operations = { | |
149 | .readpage = orangefs_readpage, | |
150 | .readpages = orangefs_readpages, | |
151 | .invalidatepage = orangefs_invalidatepage, | |
152 | .releasepage = orangefs_releasepage, | |
575e9461 | 153 | /* .direct_IO = orangefs_direct_IO */ |
5db11c21 MM |
154 | }; |
155 | ||
8bb8aefd | 156 | static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr) |
5db11c21 | 157 | { |
8bb8aefd YL |
158 | struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); |
159 | struct orangefs_kernel_op_s *new_op; | |
fecd86aa | 160 | loff_t orig_size; |
5db11c21 MM |
161 | int ret = -EINVAL; |
162 | ||
163 | gossip_debug(GOSSIP_INODE_DEBUG, | |
164 | "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n", | |
165 | __func__, | |
166 | get_khandle_from_ino(inode), | |
8bb8aefd YL |
167 | &orangefs_inode->refn.khandle, |
168 | orangefs_inode->refn.fs_id, | |
5db11c21 MM |
169 | iattr->ia_size); |
170 | ||
fecd86aa MB |
171 | /* Ensure that we have a up to date size, so we know if it changed. */ |
172 | ret = orangefs_inode_getattr(inode, 0, 1); | |
173 | if (ret == -ESTALE) | |
174 | ret = -EIO; | |
175 | if (ret) { | |
176 | gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n", | |
177 | __func__, ret); | |
178 | return ret; | |
179 | } | |
180 | orig_size = i_size_read(inode); | |
181 | ||
5db11c21 MM |
182 | truncate_setsize(inode, iattr->ia_size); |
183 | ||
8bb8aefd | 184 | new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE); |
5db11c21 MM |
185 | if (!new_op) |
186 | return -ENOMEM; | |
187 | ||
8bb8aefd | 188 | new_op->upcall.req.truncate.refn = orangefs_inode->refn; |
5db11c21 MM |
189 | new_op->upcall.req.truncate.size = (__s64) iattr->ia_size; |
190 | ||
191 | ret = service_operation(new_op, __func__, | |
192 | get_interruptible_flag(inode)); | |
193 | ||
194 | /* | |
195 | * the truncate has no downcall members to retrieve, but | |
196 | * the status value tells us if it went through ok or not | |
197 | */ | |
198 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 199 | "orangefs: orangefs_truncate got return value of %d\n", |
5db11c21 MM |
200 | ret); |
201 | ||
202 | op_release(new_op); | |
203 | ||
204 | if (ret != 0) | |
205 | return ret; | |
206 | ||
207 | /* | |
208 | * Only change the c/mtime if we are changing the size or we are | |
209 | * explicitly asked to change it. This handles the semantic difference | |
210 | * between truncate() and ftruncate() as implemented in the VFS. | |
211 | * | |
212 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a | |
213 | * special case where we need to update the times despite not having | |
214 | * these flags set. For all other operations the VFS set these flags | |
215 | * explicitly if it wants a timestamp update. | |
216 | */ | |
217 | if (orig_size != i_size_read(inode) && | |
218 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { | |
219 | iattr->ia_ctime = iattr->ia_mtime = | |
220 | current_fs_time(inode->i_sb); | |
221 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; | |
222 | } | |
223 | ||
224 | return ret; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Change attributes of an object referenced by dentry. | |
229 | */ | |
8bb8aefd | 230 | int orangefs_setattr(struct dentry *dentry, struct iattr *iattr) |
5db11c21 MM |
231 | { |
232 | int ret = -EINVAL; | |
233 | struct inode *inode = dentry->d_inode; | |
234 | ||
235 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 236 | "orangefs_setattr: called on %s\n", |
5db11c21 MM |
237 | dentry->d_name.name); |
238 | ||
239 | ret = inode_change_ok(inode, iattr); | |
240 | if (ret) | |
241 | goto out; | |
242 | ||
243 | if ((iattr->ia_valid & ATTR_SIZE) && | |
244 | iattr->ia_size != i_size_read(inode)) { | |
8bb8aefd | 245 | ret = orangefs_setattr_size(inode, iattr); |
5db11c21 MM |
246 | if (ret) |
247 | goto out; | |
248 | } | |
249 | ||
250 | setattr_copy(inode, iattr); | |
251 | mark_inode_dirty(inode); | |
252 | ||
8bb8aefd | 253 | ret = orangefs_inode_setattr(inode, iattr); |
5db11c21 | 254 | gossip_debug(GOSSIP_INODE_DEBUG, |
8bb8aefd | 255 | "orangefs_setattr: inode_setattr returned %d\n", |
5db11c21 MM |
256 | ret); |
257 | ||
258 | if (!ret && (iattr->ia_valid & ATTR_MODE)) | |
259 | /* change mod on a file that has ACLs */ | |
260 | ret = posix_acl_chmod(inode, inode->i_mode); | |
261 | ||
262 | out: | |
8bb8aefd | 263 | gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n", ret); |
5db11c21 MM |
264 | return ret; |
265 | } | |
266 | ||
267 | /* | |
268 | * Obtain attributes of an object given a dentry | |
269 | */ | |
8bb8aefd | 270 | int orangefs_getattr(struct vfsmount *mnt, |
5db11c21 MM |
271 | struct dentry *dentry, |
272 | struct kstat *kstat) | |
273 | { | |
274 | int ret = -ENOENT; | |
275 | struct inode *inode = dentry->d_inode; | |
8bb8aefd | 276 | struct orangefs_inode_s *orangefs_inode = NULL; |
5db11c21 MM |
277 | |
278 | gossip_debug(GOSSIP_INODE_DEBUG, | |
8bb8aefd | 279 | "orangefs_getattr: called on %s\n", |
5db11c21 MM |
280 | dentry->d_name.name); |
281 | ||
8f24928d | 282 | ret = orangefs_inode_getattr(inode, 0, 1); |
5db11c21 MM |
283 | if (ret == 0) { |
284 | generic_fillattr(inode, kstat); | |
a7d3e78a | 285 | |
5db11c21 | 286 | /* override block size reported to stat */ |
8bb8aefd YL |
287 | orangefs_inode = ORANGEFS_I(inode); |
288 | kstat->blksize = orangefs_inode->blksize; | |
5db11c21 MM |
289 | } |
290 | return ret; | |
291 | } | |
292 | ||
933287da MB |
293 | int orangefs_permission(struct inode *inode, int mask) |
294 | { | |
295 | int ret; | |
296 | ||
297 | if (mask & MAY_NOT_BLOCK) | |
298 | return -ECHILD; | |
299 | ||
300 | gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__); | |
301 | ||
302 | /* Make sure the permission (and other common attrs) are up to date. */ | |
8f24928d | 303 | ret = orangefs_inode_getattr(inode, 0, 0); |
933287da MB |
304 | if (ret < 0) |
305 | return ret; | |
306 | ||
307 | return generic_permission(inode, mask); | |
308 | } | |
309 | ||
8bb8aefd YL |
310 | /* ORANGEDS2 implementation of VFS inode operations for files */ |
311 | struct inode_operations orangefs_file_inode_operations = { | |
312 | .get_acl = orangefs_get_acl, | |
313 | .set_acl = orangefs_set_acl, | |
314 | .setattr = orangefs_setattr, | |
315 | .getattr = orangefs_getattr, | |
5db11c21 MM |
316 | .setxattr = generic_setxattr, |
317 | .getxattr = generic_getxattr, | |
8bb8aefd | 318 | .listxattr = orangefs_listxattr, |
5db11c21 | 319 | .removexattr = generic_removexattr, |
933287da | 320 | .permission = orangefs_permission, |
5db11c21 MM |
321 | }; |
322 | ||
8bb8aefd | 323 | static int orangefs_init_iops(struct inode *inode) |
5db11c21 | 324 | { |
8bb8aefd | 325 | inode->i_mapping->a_ops = &orangefs_address_operations; |
5db11c21 MM |
326 | |
327 | switch (inode->i_mode & S_IFMT) { | |
328 | case S_IFREG: | |
8bb8aefd YL |
329 | inode->i_op = &orangefs_file_inode_operations; |
330 | inode->i_fop = &orangefs_file_operations; | |
5db11c21 MM |
331 | inode->i_blkbits = PAGE_CACHE_SHIFT; |
332 | break; | |
333 | case S_IFLNK: | |
8bb8aefd | 334 | inode->i_op = &orangefs_symlink_inode_operations; |
5db11c21 MM |
335 | break; |
336 | case S_IFDIR: | |
8bb8aefd YL |
337 | inode->i_op = &orangefs_dir_inode_operations; |
338 | inode->i_fop = &orangefs_dir_operations; | |
5db11c21 MM |
339 | break; |
340 | default: | |
341 | gossip_debug(GOSSIP_INODE_DEBUG, | |
342 | "%s: unsupported mode\n", | |
343 | __func__); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | /* | |
8bb8aefd | 351 | * Given a ORANGEFS object identifier (fsid, handle), convert it into a ino_t type |
5db11c21 MM |
352 | * that will be used as a hash-index from where the handle will |
353 | * be searched for in the VFS hash table of inodes. | |
354 | */ | |
8bb8aefd | 355 | static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref) |
5db11c21 MM |
356 | { |
357 | if (!ref) | |
358 | return 0; | |
8bb8aefd | 359 | return orangefs_khandle_to_ino(&(ref->khandle)); |
5db11c21 MM |
360 | } |
361 | ||
362 | /* | |
363 | * Called to set up an inode from iget5_locked. | |
364 | */ | |
8bb8aefd | 365 | static int orangefs_set_inode(struct inode *inode, void *data) |
5db11c21 | 366 | { |
8bb8aefd | 367 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
a4c680a0 MB |
368 | ORANGEFS_I(inode)->refn.fs_id = ref->fs_id; |
369 | ORANGEFS_I(inode)->refn.khandle = ref->khandle; | |
5db11c21 MM |
370 | return 0; |
371 | } | |
372 | ||
373 | /* | |
374 | * Called to determine if handles match. | |
375 | */ | |
8bb8aefd | 376 | static int orangefs_test_inode(struct inode *inode, void *data) |
5db11c21 | 377 | { |
8bb8aefd YL |
378 | struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data; |
379 | struct orangefs_inode_s *orangefs_inode = NULL; | |
5db11c21 | 380 | |
8bb8aefd YL |
381 | orangefs_inode = ORANGEFS_I(inode); |
382 | return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle), &(ref->khandle)) | |
383 | && orangefs_inode->refn.fs_id == ref->fs_id); | |
5db11c21 MM |
384 | } |
385 | ||
386 | /* | |
8bb8aefd | 387 | * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS |
5db11c21 MM |
388 | * file handle. |
389 | * | |
390 | * @sb: the file system super block instance. | |
8bb8aefd | 391 | * @ref: The ORANGEFS object for which we are trying to locate an inode structure. |
5db11c21 | 392 | */ |
8bb8aefd | 393 | struct inode *orangefs_iget(struct super_block *sb, struct orangefs_object_kref *ref) |
5db11c21 MM |
394 | { |
395 | struct inode *inode = NULL; | |
396 | unsigned long hash; | |
397 | int error; | |
398 | ||
8bb8aefd YL |
399 | hash = orangefs_handle_hash(ref); |
400 | inode = iget5_locked(sb, hash, orangefs_test_inode, orangefs_set_inode, ref); | |
5db11c21 MM |
401 | if (!inode || !(inode->i_state & I_NEW)) |
402 | return inode; | |
403 | ||
075cca50 | 404 | error = orangefs_inode_getattr(inode, 1, 0); |
5db11c21 MM |
405 | if (error) { |
406 | iget_failed(inode); | |
407 | return ERR_PTR(error); | |
408 | } | |
409 | ||
410 | inode->i_ino = hash; /* needed for stat etc */ | |
8bb8aefd | 411 | orangefs_init_iops(inode); |
5db11c21 MM |
412 | unlock_new_inode(inode); |
413 | ||
414 | gossip_debug(GOSSIP_INODE_DEBUG, | |
415 | "iget handle %pU, fsid %d hash %ld i_ino %lu\n", | |
416 | &ref->khandle, | |
417 | ref->fs_id, | |
418 | hash, | |
419 | inode->i_ino); | |
420 | ||
421 | return inode; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Allocate an inode for a newly created file and insert it into the inode hash. | |
426 | */ | |
8bb8aefd YL |
427 | struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, |
428 | int mode, dev_t dev, struct orangefs_object_kref *ref) | |
5db11c21 | 429 | { |
8bb8aefd | 430 | unsigned long hash = orangefs_handle_hash(ref); |
5db11c21 MM |
431 | struct inode *inode; |
432 | int error; | |
433 | ||
434 | gossip_debug(GOSSIP_INODE_DEBUG, | |
5253487e MM |
435 | "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n", |
436 | __func__, | |
5db11c21 MM |
437 | sb, |
438 | MAJOR(dev), | |
439 | MINOR(dev), | |
440 | mode); | |
441 | ||
442 | inode = new_inode(sb); | |
443 | if (!inode) | |
444 | return NULL; | |
445 | ||
8bb8aefd | 446 | orangefs_set_inode(inode, ref); |
5db11c21 MM |
447 | inode->i_ino = hash; /* needed for stat etc */ |
448 | ||
075cca50 | 449 | error = orangefs_inode_getattr(inode, 1, 0); |
5db11c21 MM |
450 | if (error) |
451 | goto out_iput; | |
452 | ||
8bb8aefd | 453 | orangefs_init_iops(inode); |
5db11c21 MM |
454 | |
455 | inode->i_mode = mode; | |
456 | inode->i_uid = current_fsuid(); | |
457 | inode->i_gid = current_fsgid(); | |
458 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
459 | inode->i_size = PAGE_CACHE_SIZE; | |
460 | inode->i_rdev = dev; | |
461 | ||
8bb8aefd | 462 | error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref); |
5db11c21 MM |
463 | if (error < 0) |
464 | goto out_iput; | |
465 | ||
466 | gossip_debug(GOSSIP_INODE_DEBUG, | |
467 | "Initializing ACL's for inode %pU\n", | |
468 | get_khandle_from_ino(inode)); | |
8bb8aefd | 469 | orangefs_init_acl(inode, dir); |
5db11c21 MM |
470 | return inode; |
471 | ||
472 | out_iput: | |
473 | iput(inode); | |
474 | return ERR_PTR(error); | |
475 | } |