Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
08e0e7c8 | 2 | /* AFS filesystem file handling |
1da177e4 | 3 | * |
08e0e7c8 | 4 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
1da177e4 | 5 | * Written by David Howells (dhowells@redhat.com) |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
1da177e4 LT |
11 | #include <linux/fs.h> |
12 | #include <linux/pagemap.h> | |
31143d5d | 13 | #include <linux/writeback.h> |
5a0e3ad6 | 14 | #include <linux/gfp.h> |
91b467e0 | 15 | #include <linux/task_io_accounting_ops.h> |
f86196ea | 16 | #include <linux/mm.h> |
d7bdba1c | 17 | #include <linux/swap.h> |
5cbf0398 | 18 | #include <linux/netfs.h> |
1da177e4 LT |
19 | #include "internal.h" |
20 | ||
1cf7a151 | 21 | static int afs_file_mmap(struct file *file, struct vm_area_struct *vma); |
d7e0f539 | 22 | static int afs_symlink_read_folio(struct file *file, struct folio *folio); |
1da177e4 | 23 | |
3978d816 | 24 | static ssize_t afs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter); |
d96d96ee DH |
25 | static ssize_t afs_file_splice_read(struct file *in, loff_t *ppos, |
26 | struct pipe_inode_info *pipe, | |
27 | size_t len, unsigned int flags); | |
6e0e99d5 DH |
28 | static void afs_vm_open(struct vm_area_struct *area); |
29 | static void afs_vm_close(struct vm_area_struct *area); | |
30 | static vm_fault_t afs_vm_map_pages(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff); | |
9b3f26c9 | 31 | |
00d3b7a4 DH |
32 | const struct file_operations afs_file_operations = { |
33 | .open = afs_open, | |
34 | .release = afs_release, | |
35 | .llseek = generic_file_llseek, | |
3978d816 | 36 | .read_iter = afs_file_read_iter, |
3560358a | 37 | .write_iter = netfs_file_write_iter, |
1cf7a151 | 38 | .mmap = afs_file_mmap, |
d96d96ee | 39 | .splice_read = afs_file_splice_read, |
06a17bbe | 40 | .splice_write = iter_file_splice_write, |
31143d5d | 41 | .fsync = afs_fsync, |
e8d6c554 DH |
42 | .lock = afs_lock, |
43 | .flock = afs_flock, | |
00d3b7a4 DH |
44 | }; |
45 | ||
754661f1 | 46 | const struct inode_operations afs_file_inode_operations = { |
416351f2 | 47 | .getattr = afs_getattr, |
31143d5d | 48 | .setattr = afs_setattr, |
00d3b7a4 | 49 | .permission = afs_permission, |
1da177e4 LT |
50 | }; |
51 | ||
75bd228d | 52 | const struct address_space_operations afs_file_aops = { |
3560358a | 53 | .direct_IO = noop_direct_IO, |
6c62371b | 54 | .read_folio = netfs_read_folio, |
bc899ee1 | 55 | .readahead = netfs_readahead, |
c9c4ff12 | 56 | .dirty_folio = netfs_dirty_folio, |
c1ec4d7c DH |
57 | .release_folio = netfs_release_folio, |
58 | .invalidate_folio = netfs_invalidate_folio, | |
a9eb558a | 59 | .migrate_folio = filemap_migrate_folio, |
3560358a | 60 | .writepages = afs_writepages, |
1da177e4 LT |
61 | }; |
62 | ||
75bd228d | 63 | const struct address_space_operations afs_symlink_aops = { |
d7e0f539 | 64 | .read_folio = afs_symlink_read_folio, |
c1ec4d7c DH |
65 | .release_folio = netfs_release_folio, |
66 | .invalidate_folio = netfs_invalidate_folio, | |
a9eb558a | 67 | .migrate_folio = filemap_migrate_folio, |
75bd228d DH |
68 | }; |
69 | ||
1cf7a151 | 70 | static const struct vm_operations_struct afs_vm_ops = { |
6e0e99d5 DH |
71 | .open = afs_vm_open, |
72 | .close = afs_vm_close, | |
1cf7a151 | 73 | .fault = filemap_fault, |
6e0e99d5 | 74 | .map_pages = afs_vm_map_pages, |
1cf7a151 DH |
75 | .page_mkwrite = afs_page_mkwrite, |
76 | }; | |
77 | ||
4343d008 DH |
78 | /* |
79 | * Discard a pin on a writeback key. | |
80 | */ | |
81 | void afs_put_wb_key(struct afs_wb_key *wbk) | |
82 | { | |
e49c7b2f | 83 | if (wbk && refcount_dec_and_test(&wbk->usage)) { |
4343d008 DH |
84 | key_put(wbk->key); |
85 | kfree(wbk); | |
86 | } | |
87 | } | |
88 | ||
89 | /* | |
90 | * Cache key for writeback. | |
91 | */ | |
92 | int afs_cache_wb_key(struct afs_vnode *vnode, struct afs_file *af) | |
93 | { | |
94 | struct afs_wb_key *wbk, *p; | |
95 | ||
96 | wbk = kzalloc(sizeof(struct afs_wb_key), GFP_KERNEL); | |
97 | if (!wbk) | |
98 | return -ENOMEM; | |
99 | refcount_set(&wbk->usage, 2); | |
100 | wbk->key = af->key; | |
101 | ||
102 | spin_lock(&vnode->wb_lock); | |
103 | list_for_each_entry(p, &vnode->wb_keys, vnode_link) { | |
104 | if (p->key == wbk->key) | |
105 | goto found; | |
106 | } | |
107 | ||
108 | key_get(wbk->key); | |
109 | list_add_tail(&wbk->vnode_link, &vnode->wb_keys); | |
110 | spin_unlock(&vnode->wb_lock); | |
111 | af->wb = wbk; | |
112 | return 0; | |
113 | ||
114 | found: | |
115 | refcount_inc(&p->usage); | |
116 | spin_unlock(&vnode->wb_lock); | |
117 | af->wb = p; | |
118 | kfree(wbk); | |
119 | return 0; | |
120 | } | |
121 | ||
00d3b7a4 DH |
122 | /* |
123 | * open an AFS file or directory and attach a key to it | |
124 | */ | |
125 | int afs_open(struct inode *inode, struct file *file) | |
126 | { | |
127 | struct afs_vnode *vnode = AFS_FS_I(inode); | |
215804a9 | 128 | struct afs_file *af; |
00d3b7a4 | 129 | struct key *key; |
260a9803 | 130 | int ret; |
00d3b7a4 | 131 | |
3b6492df | 132 | _enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode); |
00d3b7a4 DH |
133 | |
134 | key = afs_request_key(vnode->volume->cell); | |
135 | if (IS_ERR(key)) { | |
215804a9 DH |
136 | ret = PTR_ERR(key); |
137 | goto error; | |
00d3b7a4 DH |
138 | } |
139 | ||
215804a9 DH |
140 | af = kzalloc(sizeof(*af), GFP_KERNEL); |
141 | if (!af) { | |
142 | ret = -ENOMEM; | |
143 | goto error_key; | |
260a9803 | 144 | } |
4343d008 | 145 | af->key = key; |
260a9803 | 146 | |
215804a9 DH |
147 | ret = afs_validate(vnode, key); |
148 | if (ret < 0) | |
149 | goto error_af; | |
150 | ||
4343d008 DH |
151 | if (file->f_mode & FMODE_WRITE) { |
152 | ret = afs_cache_wb_key(vnode, af); | |
153 | if (ret < 0) | |
154 | goto error_af; | |
155 | } | |
5a813276 DH |
156 | |
157 | if (file->f_flags & O_TRUNC) | |
158 | set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags); | |
523d27cd DH |
159 | |
160 | fscache_use_cookie(afs_vnode_cache(vnode), file->f_mode & FMODE_WRITE); | |
161 | ||
215804a9 | 162 | file->private_data = af; |
00d3b7a4 DH |
163 | _leave(" = 0"); |
164 | return 0; | |
215804a9 DH |
165 | |
166 | error_af: | |
167 | kfree(af); | |
168 | error_key: | |
169 | key_put(key); | |
170 | error: | |
171 | _leave(" = %d", ret); | |
172 | return ret; | |
00d3b7a4 DH |
173 | } |
174 | ||
175 | /* | |
176 | * release an AFS file or directory and discard its key | |
177 | */ | |
178 | int afs_release(struct inode *inode, struct file *file) | |
179 | { | |
523d27cd | 180 | struct afs_vnode_cache_aux aux; |
00d3b7a4 | 181 | struct afs_vnode *vnode = AFS_FS_I(inode); |
215804a9 | 182 | struct afs_file *af = file->private_data; |
523d27cd | 183 | loff_t i_size; |
a1b879ee | 184 | int ret = 0; |
00d3b7a4 | 185 | |
3b6492df | 186 | _enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode); |
00d3b7a4 | 187 | |
5a813276 | 188 | if ((file->f_mode & FMODE_WRITE)) |
a1b879ee | 189 | ret = vfs_fsync(file, 0); |
5a813276 | 190 | |
215804a9 | 191 | file->private_data = NULL; |
4343d008 DH |
192 | if (af->wb) |
193 | afs_put_wb_key(af->wb); | |
523d27cd DH |
194 | |
195 | if ((file->f_mode & FMODE_WRITE)) { | |
874c8ca1 | 196 | i_size = i_size_read(&vnode->netfs.inode); |
523d27cd DH |
197 | afs_set_cache_aux(vnode, &aux); |
198 | fscache_unuse_cookie(afs_vnode_cache(vnode), &aux, &i_size); | |
199 | } else { | |
200 | fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL); | |
201 | } | |
202 | ||
215804a9 DH |
203 | key_put(af->key); |
204 | kfree(af); | |
4343d008 | 205 | afs_prune_wb_keys(vnode); |
a1b879ee DH |
206 | _leave(" = %d", ret); |
207 | return ret; | |
00d3b7a4 DH |
208 | } |
209 | ||
c4508464 | 210 | /* |
5cbf0398 | 211 | * Allocate a new read record. |
c4508464 | 212 | */ |
5cbf0398 | 213 | struct afs_read *afs_alloc_read(gfp_t gfp) |
c4508464 | 214 | { |
5cbf0398 | 215 | struct afs_read *req; |
c4508464 | 216 | |
5cbf0398 DH |
217 | req = kzalloc(sizeof(struct afs_read), gfp); |
218 | if (req) | |
219 | refcount_set(&req->usage, 1); | |
c4508464 | 220 | |
5cbf0398 | 221 | return req; |
c4508464 DH |
222 | } |
223 | ||
196ee9cd DH |
224 | /* |
225 | * Dispose of a ref to a read record. | |
226 | */ | |
227 | void afs_put_read(struct afs_read *req) | |
228 | { | |
f3ddee8d | 229 | if (refcount_dec_and_test(&req->usage)) { |
c4508464 DH |
230 | if (req->cleanup) |
231 | req->cleanup(req); | |
c69bf479 | 232 | key_put(req->key); |
196ee9cd DH |
233 | kfree(req); |
234 | } | |
235 | } | |
236 | ||
dc419184 DH |
237 | static void afs_fetch_data_notify(struct afs_operation *op) |
238 | { | |
239 | struct afs_read *req = op->fetch.req; | |
6a19114b | 240 | struct netfs_io_subrequest *subreq = req->subreq; |
2de5599f | 241 | int error = afs_op_error(op); |
dc419184 | 242 | |
dc419184 | 243 | req->error = error; |
5cbf0398 DH |
244 | if (subreq) { |
245 | __set_bit(NETFS_SREQ_CLEAR_TAIL, &subreq->flags); | |
246 | netfs_subreq_terminated(subreq, error ?: req->actual_len, false); | |
247 | req->subreq = NULL; | |
248 | } else if (req->done) { | |
dc419184 | 249 | req->done(req); |
5cbf0398 | 250 | } |
dc419184 DH |
251 | } |
252 | ||
e49c7b2f DH |
253 | static void afs_fetch_data_success(struct afs_operation *op) |
254 | { | |
255 | struct afs_vnode *vnode = op->file[0].vnode; | |
256 | ||
257 | _enter("op=%08x", op->debug_id); | |
e49c7b2f DH |
258 | afs_vnode_commit_status(op, &op->file[0]); |
259 | afs_stat_v(vnode, n_fetches); | |
260 | atomic_long_add(op->fetch.req->actual_len, &op->net->n_fetch_bytes); | |
dc419184 | 261 | afs_fetch_data_notify(op); |
e49c7b2f DH |
262 | } |
263 | ||
264 | static void afs_fetch_data_put(struct afs_operation *op) | |
265 | { | |
2de5599f | 266 | op->fetch.req->error = afs_op_error(op); |
e49c7b2f DH |
267 | afs_put_read(op->fetch.req); |
268 | } | |
269 | ||
270 | static const struct afs_operation_ops afs_fetch_data_operation = { | |
271 | .issue_afs_rpc = afs_fs_fetch_data, | |
272 | .issue_yfs_rpc = yfs_fs_fetch_data, | |
273 | .success = afs_fetch_data_success, | |
728279a5 | 274 | .aborted = afs_check_for_remote_deletion, |
dc419184 | 275 | .failed = afs_fetch_data_notify, |
e49c7b2f DH |
276 | .put = afs_fetch_data_put, |
277 | }; | |
278 | ||
d2ddc776 DH |
279 | /* |
280 | * Fetch file data from the volume. | |
281 | */ | |
c69bf479 | 282 | int afs_fetch_data(struct afs_vnode *vnode, struct afs_read *req) |
d2ddc776 | 283 | { |
e49c7b2f | 284 | struct afs_operation *op; |
d2ddc776 | 285 | |
3b6492df | 286 | _enter("%s{%llx:%llu.%u},%x,,,", |
d2ddc776 DH |
287 | vnode->volume->name, |
288 | vnode->fid.vid, | |
289 | vnode->fid.vnode, | |
290 | vnode->fid.unique, | |
c69bf479 | 291 | key_serial(req->key)); |
d2ddc776 | 292 | |
c69bf479 | 293 | op = afs_alloc_operation(req->key, vnode->volume); |
5cbf0398 DH |
294 | if (IS_ERR(op)) { |
295 | if (req->subreq) | |
296 | netfs_subreq_terminated(req->subreq, PTR_ERR(op), false); | |
e49c7b2f | 297 | return PTR_ERR(op); |
5cbf0398 | 298 | } |
a58823ac | 299 | |
e49c7b2f | 300 | afs_op_set_vnode(op, 0, vnode); |
d2ddc776 | 301 | |
e49c7b2f DH |
302 | op->fetch.req = afs_get_read(req); |
303 | op->ops = &afs_fetch_data_operation; | |
304 | return afs_do_sync_operation(op); | |
d2ddc776 DH |
305 | } |
306 | ||
f18a3785 | 307 | static void afs_issue_read(struct netfs_io_subrequest *subreq) |
1da177e4 | 308 | { |
5cbf0398 DH |
309 | struct afs_vnode *vnode = AFS_FS_I(subreq->rreq->inode); |
310 | struct afs_read *fsreq; | |
1da177e4 | 311 | |
5cbf0398 DH |
312 | fsreq = afs_alloc_read(GFP_NOFS); |
313 | if (!fsreq) | |
314 | return netfs_subreq_terminated(subreq, -ENOMEM, false); | |
1da177e4 | 315 | |
5cbf0398 DH |
316 | fsreq->subreq = subreq; |
317 | fsreq->pos = subreq->start + subreq->transferred; | |
318 | fsreq->len = subreq->len - subreq->transferred; | |
345e1ae0 | 319 | fsreq->key = key_get(subreq->rreq->netfs_priv); |
5cbf0398 | 320 | fsreq->vnode = vnode; |
92b6cc5d | 321 | fsreq->iter = &subreq->io_iter; |
c4508464 | 322 | |
5cbf0398 | 323 | afs_fetch_data(fsreq->vnode, fsreq); |
345e1ae0 | 324 | afs_put_read(fsreq); |
ec26815a | 325 | } |
1da177e4 | 326 | |
d7e0f539 | 327 | static int afs_symlink_read_folio(struct file *file, struct folio *folio) |
f6d335c0 | 328 | { |
d7e0f539 | 329 | struct afs_vnode *vnode = AFS_FS_I(folio->mapping->host); |
5cbf0398 | 330 | struct afs_read *fsreq; |
f6d335c0 AV |
331 | int ret; |
332 | ||
5cbf0398 DH |
333 | fsreq = afs_alloc_read(GFP_NOFS); |
334 | if (!fsreq) | |
91b467e0 DH |
335 | return -ENOMEM; |
336 | ||
78525c74 DH |
337 | fsreq->pos = folio_pos(folio); |
338 | fsreq->len = folio_size(folio); | |
5cbf0398 DH |
339 | fsreq->vnode = vnode; |
340 | fsreq->iter = &fsreq->def_iter; | |
de4eda9d | 341 | iov_iter_xarray(&fsreq->def_iter, ITER_DEST, &folio->mapping->i_pages, |
5cbf0398 | 342 | fsreq->pos, fsreq->len); |
c4508464 | 343 | |
5cbf0398 | 344 | ret = afs_fetch_data(fsreq->vnode, fsreq); |
78525c74 | 345 | if (ret == 0) |
d7e0f539 MWO |
346 | folio_mark_uptodate(folio); |
347 | folio_unlock(folio); | |
5cbf0398 DH |
348 | return ret; |
349 | } | |
91b467e0 | 350 | |
2de16041 | 351 | static int afs_init_request(struct netfs_io_request *rreq, struct file *file) |
5cbf0398 | 352 | { |
3560358a DH |
353 | if (file) |
354 | rreq->netfs_priv = key_get(afs_file_key(file)); | |
355 | rreq->rsize = 256 * 1024; | |
2df86547 | 356 | rreq->wsize = 256 * 1024 * 1024; |
2de16041 | 357 | return 0; |
5cbf0398 | 358 | } |
91b467e0 | 359 | |
3003bbd0 | 360 | static int afs_check_write_begin(struct file *file, loff_t pos, unsigned len, |
fac47b43 | 361 | struct folio **foliop, void **_fsdata) |
3003bbd0 DH |
362 | { |
363 | struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); | |
364 | ||
365 | return test_bit(AFS_VNODE_DELETED, &vnode->flags) ? -ESTALE : 0; | |
366 | } | |
367 | ||
40a81101 | 368 | static void afs_free_request(struct netfs_io_request *rreq) |
1da177e4 | 369 | { |
40a81101 | 370 | key_put(rreq->netfs_priv); |
5cbf0398 | 371 | } |
f6d335c0 | 372 | |
3560358a | 373 | static void afs_update_i_size(struct inode *inode, loff_t new_i_size) |
c7f75ef3 | 374 | { |
3560358a DH |
375 | struct afs_vnode *vnode = AFS_FS_I(inode); |
376 | loff_t i_size; | |
f86726a6 | 377 | |
3560358a DH |
378 | write_seqlock(&vnode->cb_lock); |
379 | i_size = i_size_read(&vnode->netfs.inode); | |
380 | if (new_i_size > i_size) { | |
381 | i_size_write(&vnode->netfs.inode, new_i_size); | |
382 | inode_set_bytes(&vnode->netfs.inode, new_i_size); | |
383 | } | |
384 | write_sequnlock(&vnode->cb_lock); | |
385 | fscache_update_cookie(afs_vnode_cache(vnode), NULL, &new_i_size); | |
f86726a6 DH |
386 | } |
387 | ||
3560358a | 388 | static void afs_netfs_invalidate_cache(struct netfs_io_request *wreq) |
9b3f26c9 | 389 | { |
3560358a | 390 | struct afs_vnode *vnode = AFS_FS_I(wreq->inode); |
9b3f26c9 | 391 | |
3560358a | 392 | afs_invalidate_cache(vnode, 0); |
9b3f26c9 DH |
393 | } |
394 | ||
6a19114b DH |
395 | const struct netfs_request_ops afs_req_ops = { |
396 | .init_request = afs_init_request, | |
40a81101 | 397 | .free_request = afs_free_request, |
3003bbd0 | 398 | .check_write_begin = afs_check_write_begin, |
f18a3785 | 399 | .issue_read = afs_issue_read, |
3560358a DH |
400 | .update_i_size = afs_update_i_size, |
401 | .invalidate_cache = afs_netfs_invalidate_cache, | |
ed22e1db DH |
402 | .begin_writeback = afs_begin_writeback, |
403 | .prepare_write = afs_prepare_write, | |
404 | .issue_write = afs_issue_write, | |
5cbf0398 | 405 | }; |
1cf7a151 | 406 | |
6e0e99d5 DH |
407 | static void afs_add_open_mmap(struct afs_vnode *vnode) |
408 | { | |
409 | if (atomic_inc_return(&vnode->cb_nr_mmap) == 1) { | |
453924de | 410 | down_write(&vnode->volume->open_mmaps_lock); |
6e0e99d5 | 411 | |
1744a22a | 412 | if (list_empty(&vnode->cb_mmap_link)) |
453924de | 413 | list_add_tail(&vnode->cb_mmap_link, &vnode->volume->open_mmaps); |
6e0e99d5 | 414 | |
453924de | 415 | up_write(&vnode->volume->open_mmaps_lock); |
6e0e99d5 DH |
416 | } |
417 | } | |
418 | ||
419 | static void afs_drop_open_mmap(struct afs_vnode *vnode) | |
420 | { | |
275655d3 | 421 | if (atomic_add_unless(&vnode->cb_nr_mmap, -1, 1)) |
6e0e99d5 DH |
422 | return; |
423 | ||
453924de | 424 | down_write(&vnode->volume->open_mmaps_lock); |
6e0e99d5 | 425 | |
275655d3 AV |
426 | read_seqlock_excl(&vnode->cb_lock); |
427 | // the only place where ->cb_nr_mmap may hit 0 | |
428 | // see __afs_break_callback() for the other side... | |
429 | if (atomic_dec_and_test(&vnode->cb_nr_mmap)) | |
6e0e99d5 | 430 | list_del_init(&vnode->cb_mmap_link); |
275655d3 | 431 | read_sequnlock_excl(&vnode->cb_lock); |
6e0e99d5 | 432 | |
453924de | 433 | up_write(&vnode->volume->open_mmaps_lock); |
6e0e99d5 DH |
434 | flush_work(&vnode->cb_work); |
435 | } | |
436 | ||
1cf7a151 DH |
437 | /* |
438 | * Handle setting up a memory mapping on an AFS file. | |
439 | */ | |
440 | static int afs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
441 | { | |
6e0e99d5 | 442 | struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); |
1cf7a151 DH |
443 | int ret; |
444 | ||
6e0e99d5 DH |
445 | afs_add_open_mmap(vnode); |
446 | ||
1cf7a151 DH |
447 | ret = generic_file_mmap(file, vma); |
448 | if (ret == 0) | |
449 | vma->vm_ops = &afs_vm_ops; | |
6e0e99d5 DH |
450 | else |
451 | afs_drop_open_mmap(vnode); | |
1cf7a151 DH |
452 | return ret; |
453 | } | |
3978d816 | 454 | |
6e0e99d5 DH |
455 | static void afs_vm_open(struct vm_area_struct *vma) |
456 | { | |
457 | afs_add_open_mmap(AFS_FS_I(file_inode(vma->vm_file))); | |
458 | } | |
459 | ||
460 | static void afs_vm_close(struct vm_area_struct *vma) | |
461 | { | |
462 | afs_drop_open_mmap(AFS_FS_I(file_inode(vma->vm_file))); | |
463 | } | |
464 | ||
465 | static vm_fault_t afs_vm_map_pages(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff) | |
466 | { | |
467 | struct afs_vnode *vnode = AFS_FS_I(file_inode(vmf->vma->vm_file)); | |
6e0e99d5 | 468 | |
453924de | 469 | if (afs_check_validity(vnode)) |
6e0e99d5 | 470 | return filemap_map_pages(vmf, start_pgoff, end_pgoff); |
0050d7f5 | 471 | return 0; |
6e0e99d5 DH |
472 | } |
473 | ||
3978d816 DH |
474 | static ssize_t afs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter) |
475 | { | |
3560358a DH |
476 | struct inode *inode = file_inode(iocb->ki_filp); |
477 | struct afs_vnode *vnode = AFS_FS_I(inode); | |
3978d816 | 478 | struct afs_file *af = iocb->ki_filp->private_data; |
3560358a | 479 | ssize_t ret; |
3978d816 | 480 | |
3560358a DH |
481 | if (iocb->ki_flags & IOCB_DIRECT) |
482 | return netfs_unbuffered_read_iter(iocb, iter); | |
483 | ||
484 | ret = netfs_start_io_read(inode); | |
3978d816 DH |
485 | if (ret < 0) |
486 | return ret; | |
3560358a DH |
487 | ret = afs_validate(vnode, af->key); |
488 | if (ret == 0) | |
489 | ret = filemap_read(iocb, iter, 0); | |
490 | netfs_end_io_read(inode); | |
491 | return ret; | |
3978d816 | 492 | } |
d96d96ee DH |
493 | |
494 | static ssize_t afs_file_splice_read(struct file *in, loff_t *ppos, | |
495 | struct pipe_inode_info *pipe, | |
496 | size_t len, unsigned int flags) | |
497 | { | |
3560358a DH |
498 | struct inode *inode = file_inode(in); |
499 | struct afs_vnode *vnode = AFS_FS_I(inode); | |
d96d96ee | 500 | struct afs_file *af = in->private_data; |
3560358a | 501 | ssize_t ret; |
d96d96ee | 502 | |
3560358a | 503 | ret = netfs_start_io_read(inode); |
d96d96ee DH |
504 | if (ret < 0) |
505 | return ret; | |
3560358a DH |
506 | ret = afs_validate(vnode, af->key); |
507 | if (ret == 0) | |
508 | ret = filemap_splice_read(in, ppos, pipe, len, flags); | |
509 | netfs_end_io_read(inode); | |
510 | return ret; | |
d96d96ee | 511 | } |