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9#include "fscache.h"
10#include "cifsglob.h"
11#include "cifs_debug.h"
12#include "cifs_fs_sb.h"
13#include "cifsproto.h"
14
15
16
17
18struct cifs_server_key {
19 struct {
20 uint16_t family;
21 __be16 port;
22 } hdr;
23 union {
24 struct in_addr ipv4_addr;
25 struct in6_addr ipv6_addr;
26 };
27} __packed;
28
29
30
31
32void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
33{
34 const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr;
35 const struct sockaddr_in *addr = (struct sockaddr_in *) sa;
36 const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa;
37 struct cifs_server_key key;
38 uint16_t key_len = sizeof(key.hdr);
39
40 memset(&key, 0, sizeof(key));
41
42
43
44
45
46 key.hdr.family = sa->sa_family;
47 switch (sa->sa_family) {
48 case AF_INET:
49 key.hdr.port = addr->sin_port;
50 key.ipv4_addr = addr->sin_addr;
51 key_len += sizeof(key.ipv4_addr);
52 break;
53
54 case AF_INET6:
55 key.hdr.port = addr6->sin6_port;
56 key.ipv6_addr = addr6->sin6_addr;
57 key_len += sizeof(key.ipv6_addr);
58 break;
59
60 default:
61 cifs_dbg(VFS, "Unknown network family '%d'\n", sa->sa_family);
62 server->fscache = NULL;
63 return;
64 }
65
66 server->fscache =
67 fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
68 &cifs_fscache_server_index_def,
69 &key, key_len,
70 NULL, 0,
71 server, 0, true);
72 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
73 __func__, server, server->fscache);
74}
75
76void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
77{
78 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
79 __func__, server, server->fscache);
80 fscache_relinquish_cookie(server->fscache, NULL, false);
81 server->fscache = NULL;
82}
83
84void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon)
85{
86 struct TCP_Server_Info *server = tcon->ses->server;
87 char *sharename;
88 struct cifs_fscache_super_auxdata auxdata;
89
90 sharename = extract_sharename(tcon->treeName);
91 if (IS_ERR(sharename)) {
92 cifs_dbg(FYI, "%s: couldn't extract sharename\n", __func__);
93 tcon->fscache = NULL;
94 return;
95 }
96
97 memset(&auxdata, 0, sizeof(auxdata));
98 auxdata.resource_id = tcon->resource_id;
99 auxdata.vol_create_time = tcon->vol_create_time;
100 auxdata.vol_serial_number = tcon->vol_serial_number;
101
102 tcon->fscache =
103 fscache_acquire_cookie(server->fscache,
104 &cifs_fscache_super_index_def,
105 sharename, strlen(sharename),
106 &auxdata, sizeof(auxdata),
107 tcon, 0, true);
108 kfree(sharename);
109 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
110 __func__, server->fscache, tcon->fscache);
111}
112
113void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon)
114{
115 struct cifs_fscache_super_auxdata auxdata;
116
117 memset(&auxdata, 0, sizeof(auxdata));
118 auxdata.resource_id = tcon->resource_id;
119 auxdata.vol_create_time = tcon->vol_create_time;
120 auxdata.vol_serial_number = tcon->vol_serial_number;
121
122 cifs_dbg(FYI, "%s: (0x%p)\n", __func__, tcon->fscache);
123 fscache_relinquish_cookie(tcon->fscache, &auxdata, false);
124 tcon->fscache = NULL;
125}
126
127static void cifs_fscache_acquire_inode_cookie(struct cifsInodeInfo *cifsi,
128 struct cifs_tcon *tcon)
129{
130 struct cifs_fscache_inode_auxdata auxdata;
131
132 memset(&auxdata, 0, sizeof(auxdata));
133 auxdata.eof = cifsi->server_eof;
134 auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
135 auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
136 auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
137 auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
138
139 cifsi->fscache =
140 fscache_acquire_cookie(tcon->fscache,
141 &cifs_fscache_inode_object_def,
142 &cifsi->uniqueid, sizeof(cifsi->uniqueid),
143 &auxdata, sizeof(auxdata),
144 cifsi, cifsi->vfs_inode.i_size, true);
145}
146
147static void cifs_fscache_enable_inode_cookie(struct inode *inode)
148{
149 struct cifsInodeInfo *cifsi = CIFS_I(inode);
150 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
151 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
152
153 if (cifsi->fscache)
154 return;
155
156 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE))
157 return;
158
159 cifs_fscache_acquire_inode_cookie(cifsi, tcon);
160
161 cifs_dbg(FYI, "%s: got FH cookie (0x%p/0x%p)\n",
162 __func__, tcon->fscache, cifsi->fscache);
163}
164
165void cifs_fscache_release_inode_cookie(struct inode *inode)
166{
167 struct cifs_fscache_inode_auxdata auxdata;
168 struct cifsInodeInfo *cifsi = CIFS_I(inode);
169
170 if (cifsi->fscache) {
171 memset(&auxdata, 0, sizeof(auxdata));
172 auxdata.eof = cifsi->server_eof;
173 auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
174 auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
175 auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
176 auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
177
178 cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
179
180 fscache_update_cookie(cifsi->fscache, &auxdata);
181 fscache_relinquish_cookie(cifsi->fscache, &auxdata, false);
182 cifsi->fscache = NULL;
183 }
184}
185
186void cifs_fscache_update_inode_cookie(struct inode *inode)
187{
188 struct cifs_fscache_inode_auxdata auxdata;
189 struct cifsInodeInfo *cifsi = CIFS_I(inode);
190
191 if (cifsi->fscache) {
192 memset(&auxdata, 0, sizeof(auxdata));
193 auxdata.eof = cifsi->server_eof;
194 auxdata.last_write_time_sec = cifsi->vfs_inode.i_mtime.tv_sec;
195 auxdata.last_change_time_sec = cifsi->vfs_inode.i_ctime.tv_sec;
196 auxdata.last_write_time_nsec = cifsi->vfs_inode.i_mtime.tv_nsec;
197 auxdata.last_change_time_nsec = cifsi->vfs_inode.i_ctime.tv_nsec;
198
199 cifs_dbg(FYI, "%s: (0x%p)\n", __func__, cifsi->fscache);
200 fscache_update_cookie(cifsi->fscache, &auxdata);
201 }
202}
203
204void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
205{
206 cifs_fscache_enable_inode_cookie(inode);
207}
208
209void cifs_fscache_reset_inode_cookie(struct inode *inode)
210{
211 struct cifsInodeInfo *cifsi = CIFS_I(inode);
212 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
213 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
214 struct fscache_cookie *old = cifsi->fscache;
215
216 if (cifsi->fscache) {
217
218 fscache_relinquish_cookie(cifsi->fscache, NULL, true);
219
220 cifs_fscache_acquire_inode_cookie(cifsi, tcon);
221 cifs_dbg(FYI, "%s: new cookie 0x%p oldcookie 0x%p\n",
222 __func__, cifsi->fscache, old);
223 }
224}
225
226int cifs_fscache_release_page(struct page *page, gfp_t gfp)
227{
228 if (PageFsCache(page)) {
229 struct inode *inode = page->mapping->host;
230 struct cifsInodeInfo *cifsi = CIFS_I(inode);
231
232 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n",
233 __func__, page, cifsi->fscache);
234 if (!fscache_maybe_release_page(cifsi->fscache, page, gfp))
235 return 0;
236 }
237
238 return 1;
239}
240
241static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx,
242 int error)
243{
244 cifs_dbg(FYI, "%s: (0x%p/%d)\n", __func__, page, error);
245 if (!error)
246 SetPageUptodate(page);
247 unlock_page(page);
248}
249
250
251
252
253int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
254{
255 int ret;
256
257 cifs_dbg(FYI, "%s: (fsc:%p, p:%p, i:0x%p\n",
258 __func__, CIFS_I(inode)->fscache, page, inode);
259 ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page,
260 cifs_readpage_from_fscache_complete,
261 NULL,
262 GFP_KERNEL);
263 switch (ret) {
264
265 case 0:
266 cifs_dbg(FYI, "%s: submitted\n", __func__);
267 return ret;
268 case -ENOBUFS:
269 case -ENODATA:
270 cifs_dbg(FYI, "%s: %d\n", __func__, ret);
271 return 1;
272
273 default:
274 cifs_dbg(VFS, "unknown error ret = %d\n", ret);
275 }
276 return ret;
277}
278
279
280
281
282int __cifs_readpages_from_fscache(struct inode *inode,
283 struct address_space *mapping,
284 struct list_head *pages,
285 unsigned *nr_pages)
286{
287 int ret;
288
289 cifs_dbg(FYI, "%s: (0x%p/%u/0x%p)\n",
290 __func__, CIFS_I(inode)->fscache, *nr_pages, inode);
291 ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping,
292 pages, nr_pages,
293 cifs_readpage_from_fscache_complete,
294 NULL,
295 mapping_gfp_mask(mapping));
296 switch (ret) {
297 case 0:
298 cifs_dbg(FYI, "%s: submitted\n", __func__);
299 return ret;
300
301 case -ENOBUFS:
302 case -ENODATA:
303 cifs_dbg(FYI, "%s: no page\n", __func__);
304 return 1;
305
306 default:
307 cifs_dbg(FYI, "unknown error ret = %d\n", ret);
308 }
309
310 return ret;
311}
312
313void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
314{
315 struct cifsInodeInfo *cifsi = CIFS_I(inode);
316 int ret;
317
318 WARN_ON(!cifsi->fscache);
319
320 cifs_dbg(FYI, "%s: (fsc: %p, p: %p, i: %p)\n",
321 __func__, cifsi->fscache, page, inode);
322 ret = fscache_write_page(cifsi->fscache, page,
323 cifsi->vfs_inode.i_size, GFP_KERNEL);
324 if (ret != 0)
325 fscache_uncache_page(cifsi->fscache, page);
326}
327
328void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages)
329{
330 cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n",
331 __func__, CIFS_I(inode)->fscache, inode);
332 fscache_readpages_cancel(CIFS_I(inode)->fscache, pages);
333}
334
335void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
336{
337 struct cifsInodeInfo *cifsi = CIFS_I(inode);
338 struct fscache_cookie *cookie = cifsi->fscache;
339
340 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
341 fscache_wait_on_page_write(cookie, page);
342 fscache_uncache_page(cookie, page);
343}
344
345void __cifs_fscache_wait_on_page_write(struct inode *inode, struct page *page)
346{
347 struct cifsInodeInfo *cifsi = CIFS_I(inode);
348 struct fscache_cookie *cookie = cifsi->fscache;
349
350 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
351 fscache_wait_on_page_write(cookie, page);
352}
353
354void __cifs_fscache_uncache_page(struct inode *inode, struct page *page)
355{
356 struct cifsInodeInfo *cifsi = CIFS_I(inode);
357 struct fscache_cookie *cookie = cifsi->fscache;
358
359 cifs_dbg(FYI, "%s: (0x%p/0x%p)\n", __func__, page, cookie);
360 fscache_uncache_page(cookie, page);
361}
362
