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b4d0d230 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
14727281 DH |
2 | /* NFS filesystem cache interface |
3 | * | |
4 | * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
14727281 DH |
6 | */ |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/nfs_fs.h> | |
13 | #include <linux/nfs_fs_sb.h> | |
14 | #include <linux/in6.h> | |
15 | #include <linux/seq_file.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
402cb8dd | 17 | #include <linux/iversion.h> |
14727281 DH |
18 | |
19 | #include "internal.h" | |
545db45f | 20 | #include "iostat.h" |
14727281 DH |
21 | #include "fscache.h" |
22 | ||
23 | #define NFSDBG_FACILITY NFSDBG_FSCACHE | |
24 | ||
08734048 DH |
25 | static struct rb_root nfs_fscache_keys = RB_ROOT; |
26 | static DEFINE_SPINLOCK(nfs_fscache_keys_lock); | |
27 | ||
402cb8dd DH |
28 | /* |
29 | * Layout of the key for an NFS server cache object. | |
30 | */ | |
31 | struct nfs_server_key { | |
32 | struct { | |
33 | uint16_t nfsversion; /* NFS protocol version */ | |
34 | uint16_t family; /* address family */ | |
35 | __be16 port; /* IP port */ | |
36 | } hdr; | |
37 | union { | |
38 | struct in_addr ipv4_addr; /* IPv4 address */ | |
39 | struct in6_addr ipv6_addr; /* IPv6 address */ | |
40 | }; | |
41 | } __packed; | |
42 | ||
14727281 DH |
43 | /* |
44 | * Get the per-client index cookie for an NFS client if the appropriate mount | |
45 | * flag was set | |
46 | * - We always try and get an index cookie for the client, but get filehandle | |
47 | * cookies on a per-superblock basis, depending on the mount flags | |
48 | */ | |
49 | void nfs_fscache_get_client_cookie(struct nfs_client *clp) | |
50 | { | |
402cb8dd DH |
51 | const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &clp->cl_addr; |
52 | const struct sockaddr_in *sin = (struct sockaddr_in *) &clp->cl_addr; | |
53 | struct nfs_server_key key; | |
54 | uint16_t len = sizeof(key.hdr); | |
55 | ||
56 | memset(&key, 0, sizeof(key)); | |
57 | key.hdr.nfsversion = clp->rpc_ops->version; | |
58 | key.hdr.family = clp->cl_addr.ss_family; | |
59 | ||
60 | switch (clp->cl_addr.ss_family) { | |
61 | case AF_INET: | |
62 | key.hdr.port = sin->sin_port; | |
63 | key.ipv4_addr = sin->sin_addr; | |
64 | len += sizeof(key.ipv4_addr); | |
65 | break; | |
66 | ||
67 | case AF_INET6: | |
68 | key.hdr.port = sin6->sin6_port; | |
69 | key.ipv6_addr = sin6->sin6_addr; | |
70 | len += sizeof(key.ipv6_addr); | |
71 | break; | |
72 | ||
73 | default: | |
74 | printk(KERN_WARNING "NFS: Unknown network family '%d'\n", | |
75 | clp->cl_addr.ss_family); | |
76 | clp->fscache = NULL; | |
77 | return; | |
78 | } | |
79 | ||
14727281 DH |
80 | /* create a cache index for looking up filehandles */ |
81 | clp->fscache = fscache_acquire_cookie(nfs_fscache_netfs.primary_index, | |
82 | &nfs_fscache_server_index_def, | |
402cb8dd DH |
83 | &key, len, |
84 | NULL, 0, | |
ee1235a9 | 85 | clp, 0, true); |
14727281 DH |
86 | dfprintk(FSCACHE, "NFS: get client cookie (0x%p/0x%p)\n", |
87 | clp, clp->fscache); | |
88 | } | |
89 | ||
90 | /* | |
91 | * Dispose of a per-client cookie | |
92 | */ | |
93 | void nfs_fscache_release_client_cookie(struct nfs_client *clp) | |
94 | { | |
95 | dfprintk(FSCACHE, "NFS: releasing client cookie (0x%p/0x%p)\n", | |
96 | clp, clp->fscache); | |
97 | ||
402cb8dd | 98 | fscache_relinquish_cookie(clp->fscache, NULL, false); |
14727281 DH |
99 | clp->fscache = NULL; |
100 | } | |
08734048 DH |
101 | |
102 | /* | |
103 | * Get the cache cookie for an NFS superblock. We have to handle | |
104 | * uniquification here because the cache doesn't do it for us. | |
2df54806 DH |
105 | * |
106 | * The default uniquifier is just an empty string, but it may be overridden | |
107 | * either by the 'fsc=xxx' option to mount, or by inheriting it from the parent | |
108 | * superblock across an automount point of some nature. | |
08734048 | 109 | */ |
2311b943 | 110 | void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int ulen) |
08734048 DH |
111 | { |
112 | struct nfs_fscache_key *key, *xkey; | |
113 | struct nfs_server *nfss = NFS_SB(sb); | |
114 | struct rb_node **p, *parent; | |
2311b943 | 115 | int diff; |
2df54806 | 116 | |
dea1bb35 TM |
117 | nfss->fscache_key = NULL; |
118 | nfss->fscache = NULL; | |
119 | if (!(nfss->options & NFS_OPTION_FSCACHE)) | |
120 | return; | |
2df54806 DH |
121 | if (!uniq) { |
122 | uniq = ""; | |
123 | ulen = 1; | |
124 | } | |
125 | ||
08734048 DH |
126 | key = kzalloc(sizeof(*key) + ulen, GFP_KERNEL); |
127 | if (!key) | |
128 | return; | |
129 | ||
130 | key->nfs_client = nfss->nfs_client; | |
131 | key->key.super.s_flags = sb->s_flags & NFS_MS_MASK; | |
132 | key->key.nfs_server.flags = nfss->flags; | |
133 | key->key.nfs_server.rsize = nfss->rsize; | |
134 | key->key.nfs_server.wsize = nfss->wsize; | |
135 | key->key.nfs_server.acregmin = nfss->acregmin; | |
136 | key->key.nfs_server.acregmax = nfss->acregmax; | |
137 | key->key.nfs_server.acdirmin = nfss->acdirmin; | |
138 | key->key.nfs_server.acdirmax = nfss->acdirmax; | |
139 | key->key.nfs_server.fsid = nfss->fsid; | |
140 | key->key.rpc_auth.au_flavor = nfss->client->cl_auth->au_flavor; | |
141 | ||
142 | key->key.uniq_len = ulen; | |
143 | memcpy(key->key.uniquifier, uniq, ulen); | |
144 | ||
145 | spin_lock(&nfs_fscache_keys_lock); | |
146 | p = &nfs_fscache_keys.rb_node; | |
147 | parent = NULL; | |
148 | while (*p) { | |
149 | parent = *p; | |
150 | xkey = rb_entry(parent, struct nfs_fscache_key, node); | |
151 | ||
152 | if (key->nfs_client < xkey->nfs_client) | |
153 | goto go_left; | |
154 | if (key->nfs_client > xkey->nfs_client) | |
155 | goto go_right; | |
156 | ||
157 | diff = memcmp(&key->key, &xkey->key, sizeof(key->key)); | |
158 | if (diff < 0) | |
159 | goto go_left; | |
160 | if (diff > 0) | |
161 | goto go_right; | |
162 | ||
163 | if (key->key.uniq_len == 0) | |
164 | goto non_unique; | |
165 | diff = memcmp(key->key.uniquifier, | |
166 | xkey->key.uniquifier, | |
167 | key->key.uniq_len); | |
168 | if (diff < 0) | |
169 | goto go_left; | |
170 | if (diff > 0) | |
171 | goto go_right; | |
172 | goto non_unique; | |
173 | ||
174 | go_left: | |
175 | p = &(*p)->rb_left; | |
176 | continue; | |
177 | go_right: | |
178 | p = &(*p)->rb_right; | |
179 | } | |
180 | ||
181 | rb_link_node(&key->node, parent, p); | |
182 | rb_insert_color(&key->node, &nfs_fscache_keys); | |
183 | spin_unlock(&nfs_fscache_keys_lock); | |
184 | nfss->fscache_key = key; | |
185 | ||
186 | /* create a cache index for looking up filehandles */ | |
187 | nfss->fscache = fscache_acquire_cookie(nfss->nfs_client->fscache, | |
188 | &nfs_fscache_super_index_def, | |
402cb8dd DH |
189 | key, sizeof(*key) + ulen, |
190 | NULL, 0, | |
ee1235a9 | 191 | nfss, 0, true); |
08734048 DH |
192 | dfprintk(FSCACHE, "NFS: get superblock cookie (0x%p/0x%p)\n", |
193 | nfss, nfss->fscache); | |
194 | return; | |
195 | ||
196 | non_unique: | |
197 | spin_unlock(&nfs_fscache_keys_lock); | |
198 | kfree(key); | |
199 | nfss->fscache_key = NULL; | |
200 | nfss->fscache = NULL; | |
201 | printk(KERN_WARNING "NFS:" | |
202 | " Cache request denied due to non-unique superblock keys\n"); | |
203 | } | |
204 | ||
205 | /* | |
206 | * release a per-superblock cookie | |
207 | */ | |
208 | void nfs_fscache_release_super_cookie(struct super_block *sb) | |
209 | { | |
210 | struct nfs_server *nfss = NFS_SB(sb); | |
211 | ||
212 | dfprintk(FSCACHE, "NFS: releasing superblock cookie (0x%p/0x%p)\n", | |
213 | nfss, nfss->fscache); | |
214 | ||
402cb8dd | 215 | fscache_relinquish_cookie(nfss->fscache, NULL, false); |
08734048 DH |
216 | nfss->fscache = NULL; |
217 | ||
218 | if (nfss->fscache_key) { | |
219 | spin_lock(&nfs_fscache_keys_lock); | |
220 | rb_erase(&nfss->fscache_key->node, &nfs_fscache_keys); | |
221 | spin_unlock(&nfs_fscache_keys_lock); | |
222 | kfree(nfss->fscache_key); | |
223 | nfss->fscache_key = NULL; | |
224 | } | |
225 | } | |
ef79c097 DH |
226 | |
227 | /* | |
228 | * Initialise the per-inode cache cookie pointer for an NFS inode. | |
229 | */ | |
f1fe29b4 | 230 | void nfs_fscache_init_inode(struct inode *inode) |
ef79c097 | 231 | { |
402cb8dd | 232 | struct nfs_fscache_inode_auxdata auxdata; |
dea1bb35 | 233 | struct nfs_server *nfss = NFS_SERVER(inode); |
ef79c097 DH |
234 | struct nfs_inode *nfsi = NFS_I(inode); |
235 | ||
f1fe29b4 | 236 | nfsi->fscache = NULL; |
dea1bb35 | 237 | if (!(nfss->fscache && S_ISREG(inode->i_mode))) |
ef79c097 | 238 | return; |
402cb8dd DH |
239 | |
240 | memset(&auxdata, 0, sizeof(auxdata)); | |
95582b00 DD |
241 | auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); |
242 | auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); | |
402cb8dd DH |
243 | |
244 | if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4) | |
245 | auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode); | |
246 | ||
f1fe29b4 DH |
247 | nfsi->fscache = fscache_acquire_cookie(NFS_SB(inode->i_sb)->fscache, |
248 | &nfs_fscache_inode_object_def, | |
402cb8dd DH |
249 | nfsi->fh.data, nfsi->fh.size, |
250 | &auxdata, sizeof(auxdata), | |
ee1235a9 | 251 | nfsi, nfsi->vfs_inode.i_size, false); |
ef79c097 DH |
252 | } |
253 | ||
254 | /* | |
255 | * Release a per-inode cookie. | |
256 | */ | |
f1fe29b4 | 257 | void nfs_fscache_clear_inode(struct inode *inode) |
ef79c097 | 258 | { |
402cb8dd | 259 | struct nfs_fscache_inode_auxdata auxdata; |
ef79c097 | 260 | struct nfs_inode *nfsi = NFS_I(inode); |
f1fe29b4 | 261 | struct fscache_cookie *cookie = nfs_i_fscache(inode); |
ef79c097 | 262 | |
f1fe29b4 | 263 | dfprintk(FSCACHE, "NFS: clear cookie (0x%p/0x%p)\n", nfsi, cookie); |
ef79c097 | 264 | |
402cb8dd | 265 | memset(&auxdata, 0, sizeof(auxdata)); |
95582b00 DD |
266 | auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); |
267 | auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); | |
402cb8dd | 268 | fscache_relinquish_cookie(cookie, &auxdata, false); |
ef79c097 DH |
269 | nfsi->fscache = NULL; |
270 | } | |
271 | ||
f1fe29b4 | 272 | static bool nfs_fscache_can_enable(void *data) |
ef79c097 | 273 | { |
f1fe29b4 | 274 | struct inode *inode = data; |
ef79c097 | 275 | |
f1fe29b4 | 276 | return !inode_is_open_for_write(inode); |
ef79c097 DH |
277 | } |
278 | ||
279 | /* | |
f1fe29b4 DH |
280 | * Enable or disable caching for a file that is being opened as appropriate. |
281 | * The cookie is allocated when the inode is initialised, but is not enabled at | |
282 | * that time. Enablement is deferred to file-open time to avoid stat() and | |
283 | * access() thrashing the cache. | |
284 | * | |
285 | * For now, with NFS, only regular files that are open read-only will be able | |
286 | * to use the cache. | |
287 | * | |
288 | * We enable the cache for an inode if we open it read-only and it isn't | |
289 | * currently open for writing. We disable the cache if the inode is open | |
290 | * write-only. | |
291 | * | |
292 | * The caller uses the file struct to pin i_writecount on the inode before | |
293 | * calling us when a file is opened for writing, so we can make use of that. | |
294 | * | |
295 | * Note that this may be invoked multiple times in parallel by parallel | |
296 | * nfs_open() functions. | |
ef79c097 | 297 | */ |
f1fe29b4 | 298 | void nfs_fscache_open_file(struct inode *inode, struct file *filp) |
ef79c097 | 299 | { |
402cb8dd | 300 | struct nfs_fscache_inode_auxdata auxdata; |
ef79c097 | 301 | struct nfs_inode *nfsi = NFS_I(inode); |
f1fe29b4 | 302 | struct fscache_cookie *cookie = nfs_i_fscache(inode); |
ef79c097 | 303 | |
f1fe29b4 DH |
304 | if (!fscache_cookie_valid(cookie)) |
305 | return; | |
ef79c097 | 306 | |
402cb8dd | 307 | memset(&auxdata, 0, sizeof(auxdata)); |
95582b00 DD |
308 | auxdata.mtime = timespec64_to_timespec(nfsi->vfs_inode.i_mtime); |
309 | auxdata.ctime = timespec64_to_timespec(nfsi->vfs_inode.i_ctime); | |
402cb8dd | 310 | |
f1fe29b4 DH |
311 | if (inode_is_open_for_write(inode)) { |
312 | dfprintk(FSCACHE, "NFS: nfsi 0x%p disabling cache\n", nfsi); | |
313 | clear_bit(NFS_INO_FSCACHE, &nfsi->flags); | |
402cb8dd | 314 | fscache_disable_cookie(cookie, &auxdata, true); |
f1fe29b4 DH |
315 | fscache_uncache_all_inode_pages(cookie, inode); |
316 | } else { | |
317 | dfprintk(FSCACHE, "NFS: nfsi 0x%p enabling cache\n", nfsi); | |
ee1235a9 | 318 | fscache_enable_cookie(cookie, &auxdata, nfsi->vfs_inode.i_size, |
402cb8dd | 319 | nfs_fscache_can_enable, inode); |
f1fe29b4 DH |
320 | if (fscache_cookie_enabled(cookie)) |
321 | set_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags); | |
ef79c097 | 322 | } |
ef79c097 | 323 | } |
f1fe29b4 | 324 | EXPORT_SYMBOL_GPL(nfs_fscache_open_file); |
545db45f DH |
325 | |
326 | /* | |
327 | * Release the caching state associated with a page, if the page isn't busy | |
328 | * interacting with the cache. | |
329 | * - Returns true (can release page) or false (page busy). | |
330 | */ | |
331 | int nfs_fscache_release_page(struct page *page, gfp_t gfp) | |
332 | { | |
545db45f | 333 | if (PageFsCache(page)) { |
f1fe29b4 | 334 | struct fscache_cookie *cookie = nfs_i_fscache(page->mapping->host); |
2c174009 TM |
335 | |
336 | BUG_ON(!cookie); | |
545db45f | 337 | dfprintk(FSCACHE, "NFS: fscache releasepage (0x%p/0x%p/0x%p)\n", |
f1fe29b4 | 338 | cookie, page, NFS_I(page->mapping->host)); |
545db45f | 339 | |
201a1542 DH |
340 | if (!fscache_maybe_release_page(cookie, page, gfp)) |
341 | return 0; | |
342 | ||
e9f456ca LR |
343 | nfs_inc_fscache_stats(page->mapping->host, |
344 | NFSIOS_FSCACHE_PAGES_UNCACHED); | |
545db45f DH |
345 | } |
346 | ||
347 | return 1; | |
348 | } | |
349 | ||
350 | /* | |
351 | * Release the caching state associated with a page if undergoing complete page | |
352 | * invalidation. | |
353 | */ | |
354 | void __nfs_fscache_invalidate_page(struct page *page, struct inode *inode) | |
355 | { | |
f1fe29b4 | 356 | struct fscache_cookie *cookie = nfs_i_fscache(inode); |
545db45f DH |
357 | |
358 | BUG_ON(!cookie); | |
359 | ||
360 | dfprintk(FSCACHE, "NFS: fscache invalidatepage (0x%p/0x%p/0x%p)\n", | |
f1fe29b4 | 361 | cookie, page, NFS_I(inode)); |
545db45f DH |
362 | |
363 | fscache_wait_on_page_write(cookie, page); | |
364 | ||
365 | BUG_ON(!PageLocked(page)); | |
366 | fscache_uncache_page(cookie, page); | |
e9f456ca LR |
367 | nfs_inc_fscache_stats(page->mapping->host, |
368 | NFSIOS_FSCACHE_PAGES_UNCACHED); | |
545db45f | 369 | } |
9a9fc1c0 DH |
370 | |
371 | /* | |
372 | * Handle completion of a page being read from the cache. | |
373 | * - Called in process (keventd) context. | |
374 | */ | |
375 | static void nfs_readpage_from_fscache_complete(struct page *page, | |
376 | void *context, | |
377 | int error) | |
378 | { | |
379 | dfprintk(FSCACHE, | |
380 | "NFS: readpage_from_fscache_complete (0x%p/0x%p/%d)\n", | |
381 | page, context, error); | |
382 | ||
383 | /* if the read completes with an error, we just unlock the page and let | |
384 | * the VM reissue the readpage */ | |
385 | if (!error) { | |
386 | SetPageUptodate(page); | |
387 | unlock_page(page); | |
388 | } else { | |
389 | error = nfs_readpage_async(context, page->mapping->host, page); | |
390 | if (error) | |
391 | unlock_page(page); | |
392 | } | |
393 | } | |
394 | ||
395 | /* | |
396 | * Retrieve a page from fscache | |
397 | */ | |
398 | int __nfs_readpage_from_fscache(struct nfs_open_context *ctx, | |
399 | struct inode *inode, struct page *page) | |
400 | { | |
401 | int ret; | |
402 | ||
403 | dfprintk(FSCACHE, | |
404 | "NFS: readpage_from_fscache(fsc:%p/p:%p(i:%lx f:%lx)/0x%p)\n", | |
f1fe29b4 | 405 | nfs_i_fscache(inode), page, page->index, page->flags, inode); |
9a9fc1c0 | 406 | |
f1fe29b4 | 407 | ret = fscache_read_or_alloc_page(nfs_i_fscache(inode), |
9a9fc1c0 DH |
408 | page, |
409 | nfs_readpage_from_fscache_complete, | |
410 | ctx, | |
411 | GFP_KERNEL); | |
412 | ||
413 | switch (ret) { | |
414 | case 0: /* read BIO submitted (page in fscache) */ | |
415 | dfprintk(FSCACHE, | |
416 | "NFS: readpage_from_fscache: BIO submitted\n"); | |
e9f456ca | 417 | nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_OK); |
9a9fc1c0 DH |
418 | return ret; |
419 | ||
420 | case -ENOBUFS: /* inode not in cache */ | |
421 | case -ENODATA: /* page not in cache */ | |
e9f456ca | 422 | nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_FAIL); |
9a9fc1c0 DH |
423 | dfprintk(FSCACHE, |
424 | "NFS: readpage_from_fscache %d\n", ret); | |
425 | return 1; | |
426 | ||
427 | default: | |
428 | dfprintk(FSCACHE, "NFS: readpage_from_fscache %d\n", ret); | |
e9f456ca | 429 | nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_FAIL); |
9a9fc1c0 DH |
430 | } |
431 | return ret; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Retrieve a set of pages from fscache | |
436 | */ | |
437 | int __nfs_readpages_from_fscache(struct nfs_open_context *ctx, | |
438 | struct inode *inode, | |
439 | struct address_space *mapping, | |
440 | struct list_head *pages, | |
441 | unsigned *nr_pages) | |
442 | { | |
0f15c53d CL |
443 | unsigned npages = *nr_pages; |
444 | int ret; | |
9a9fc1c0 DH |
445 | |
446 | dfprintk(FSCACHE, "NFS: nfs_getpages_from_fscache (0x%p/%u/0x%p)\n", | |
f1fe29b4 | 447 | nfs_i_fscache(inode), npages, inode); |
9a9fc1c0 | 448 | |
f1fe29b4 | 449 | ret = fscache_read_or_alloc_pages(nfs_i_fscache(inode), |
9a9fc1c0 DH |
450 | mapping, pages, nr_pages, |
451 | nfs_readpage_from_fscache_complete, | |
452 | ctx, | |
453 | mapping_gfp_mask(mapping)); | |
454 | if (*nr_pages < npages) | |
455 | nfs_add_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_OK, | |
456 | npages); | |
457 | if (*nr_pages > 0) | |
458 | nfs_add_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_READ_FAIL, | |
459 | *nr_pages); | |
460 | ||
461 | switch (ret) { | |
462 | case 0: /* read submitted to the cache for all pages */ | |
463 | BUG_ON(!list_empty(pages)); | |
464 | BUG_ON(*nr_pages != 0); | |
465 | dfprintk(FSCACHE, | |
466 | "NFS: nfs_getpages_from_fscache: submitted\n"); | |
467 | ||
468 | return ret; | |
469 | ||
470 | case -ENOBUFS: /* some pages aren't cached and can't be */ | |
471 | case -ENODATA: /* some pages aren't cached */ | |
472 | dfprintk(FSCACHE, | |
473 | "NFS: nfs_getpages_from_fscache: no page: %d\n", ret); | |
474 | return 1; | |
475 | ||
476 | default: | |
477 | dfprintk(FSCACHE, | |
478 | "NFS: nfs_getpages_from_fscache: ret %d\n", ret); | |
479 | } | |
480 | ||
481 | return ret; | |
482 | } | |
7f8e05f6 DH |
483 | |
484 | /* | |
485 | * Store a newly fetched page in fscache | |
486 | * - PG_fscache must be set on the page | |
487 | */ | |
488 | void __nfs_readpage_to_fscache(struct inode *inode, struct page *page, int sync) | |
489 | { | |
490 | int ret; | |
491 | ||
492 | dfprintk(FSCACHE, | |
493 | "NFS: readpage_to_fscache(fsc:%p/p:%p(i:%lx f:%lx)/%d)\n", | |
f1fe29b4 | 494 | nfs_i_fscache(inode), page, page->index, page->flags, sync); |
7f8e05f6 | 495 | |
ee1235a9 DH |
496 | ret = fscache_write_page(nfs_i_fscache(inode), page, |
497 | inode->i_size, GFP_KERNEL); | |
7f8e05f6 DH |
498 | dfprintk(FSCACHE, |
499 | "NFS: readpage_to_fscache: p:%p(i:%lu f:%lx) ret %d\n", | |
500 | page, page->index, page->flags, ret); | |
501 | ||
502 | if (ret != 0) { | |
f1fe29b4 | 503 | fscache_uncache_page(nfs_i_fscache(inode), page); |
e9f456ca LR |
504 | nfs_inc_fscache_stats(inode, |
505 | NFSIOS_FSCACHE_PAGES_WRITTEN_FAIL); | |
506 | nfs_inc_fscache_stats(inode, NFSIOS_FSCACHE_PAGES_UNCACHED); | |
7f8e05f6 | 507 | } else { |
e9f456ca LR |
508 | nfs_inc_fscache_stats(inode, |
509 | NFSIOS_FSCACHE_PAGES_WRITTEN_OK); | |
7f8e05f6 DH |
510 | } |
511 | } |