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Commit | Line | Data |
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a55370a3 | 1 | /* |
a55370a3 | 2 | * Copyright (c) 2004 The Regents of the University of Michigan. |
f3f80148 | 3 | * Copyright (c) 2012 Jeff Layton <jlayton@redhat.com> |
a55370a3 N |
4 | * All rights reserved. |
5 | * | |
6 | * Andy Adamson <andros@citi.umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
1edb82d2 | 35 | #include <crypto/hash.h> |
190e4fbf | 36 | #include <linux/file.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
190e4fbf | 38 | #include <linux/namei.h> |
e8edc6e0 | 39 | #include <linux/sched.h> |
f3f80148 | 40 | #include <linux/fs.h> |
813fd320 | 41 | #include <linux/module.h> |
f3f80148 JL |
42 | #include <net/net_namespace.h> |
43 | #include <linux/sunrpc/rpc_pipe_fs.h> | |
44 | #include <linux/sunrpc/clnt.h> | |
45 | #include <linux/nfsd/cld.h> | |
9a74af21 BH |
46 | |
47 | #include "nfsd.h" | |
48 | #include "state.h" | |
0a3adade | 49 | #include "vfs.h" |
f3f80148 | 50 | #include "netns.h" |
a55370a3 N |
51 | |
52 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
53 | ||
2a4317c5 JL |
54 | /* Declarations */ |
55 | struct nfsd4_client_tracking_ops { | |
56 | int (*init)(struct net *); | |
57 | void (*exit)(struct net *); | |
58 | void (*create)(struct nfs4_client *); | |
59 | void (*remove)(struct nfs4_client *); | |
60 | int (*check)(struct nfs4_client *); | |
919b8049 | 61 | void (*grace_done)(struct nfsd_net *); |
11a60d15 SM |
62 | uint8_t version; |
63 | size_t msglen; | |
2a4317c5 JL |
64 | }; |
65 | ||
11a60d15 | 66 | static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops; |
6ee95d1c | 67 | static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2; |
11a60d15 | 68 | |
190e4fbf | 69 | /* Globals */ |
48483bf2 | 70 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
190e4fbf | 71 | |
d84f4f99 DH |
72 | static int |
73 | nfs4_save_creds(const struct cred **original_creds) | |
190e4fbf | 74 | { |
d84f4f99 DH |
75 | struct cred *new; |
76 | ||
77 | new = prepare_creds(); | |
78 | if (!new) | |
79 | return -ENOMEM; | |
80 | ||
6fab8779 EB |
81 | new->fsuid = GLOBAL_ROOT_UID; |
82 | new->fsgid = GLOBAL_ROOT_GID; | |
d84f4f99 DH |
83 | *original_creds = override_creds(new); |
84 | put_cred(new); | |
85 | return 0; | |
190e4fbf N |
86 | } |
87 | ||
88 | static void | |
d84f4f99 | 89 | nfs4_reset_creds(const struct cred *original) |
190e4fbf | 90 | { |
d84f4f99 | 91 | revert_creds(original); |
190e4fbf N |
92 | } |
93 | ||
a55370a3 N |
94 | static void |
95 | md5_to_hex(char *out, char *md5) | |
96 | { | |
97 | int i; | |
98 | ||
99 | for (i=0; i<16; i++) { | |
100 | unsigned char c = md5[i]; | |
101 | ||
102 | *out++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1); | |
103 | *out++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1); | |
104 | } | |
105 | *out = '\0'; | |
106 | } | |
107 | ||
2216d449 JL |
108 | static int |
109 | nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname) | |
a55370a3 N |
110 | { |
111 | struct xdr_netobj cksum; | |
1edb82d2 | 112 | struct crypto_shash *tfm; |
2216d449 | 113 | int status; |
a55370a3 N |
114 | |
115 | dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n", | |
116 | clname->len, clname->data); | |
1edb82d2 HX |
117 | tfm = crypto_alloc_shash("md5", 0, 0); |
118 | if (IS_ERR(tfm)) { | |
119 | status = PTR_ERR(tfm); | |
35058687 | 120 | goto out_no_tfm; |
2216d449 JL |
121 | } |
122 | ||
1edb82d2 | 123 | cksum.len = crypto_shash_digestsize(tfm); |
a55370a3 | 124 | cksum.data = kmalloc(cksum.len, GFP_KERNEL); |
2216d449 JL |
125 | if (cksum.data == NULL) { |
126 | status = -ENOMEM; | |
a55370a3 | 127 | goto out; |
2216d449 | 128 | } |
a55370a3 | 129 | |
ea794db2 EB |
130 | status = crypto_shash_tfm_digest(tfm, clname->data, clname->len, |
131 | cksum.data); | |
2216d449 | 132 | if (status) |
35058687 | 133 | goto out; |
a55370a3 N |
134 | |
135 | md5_to_hex(dname, cksum.data); | |
136 | ||
2216d449 | 137 | status = 0; |
a55370a3 | 138 | out: |
2bd9e7b6 | 139 | kfree(cksum.data); |
1edb82d2 | 140 | crypto_free_shash(tfm); |
35058687 | 141 | out_no_tfm: |
a55370a3 N |
142 | return status; |
143 | } | |
190e4fbf | 144 | |
2216d449 JL |
145 | /* |
146 | * If we had an error generating the recdir name for the legacy tracker | |
147 | * then warn the admin. If the error doesn't appear to be transient, | |
148 | * then disable recovery tracking. | |
149 | */ | |
150 | static void | |
7255e716 | 151 | legacy_recdir_name_error(struct nfs4_client *clp, int error) |
2216d449 JL |
152 | { |
153 | printk(KERN_ERR "NFSD: unable to generate recoverydir " | |
154 | "name (%d).\n", error); | |
155 | ||
156 | /* | |
157 | * if the algorithm just doesn't exist, then disable the recovery | |
158 | * tracker altogether. The crypto libs will generally return this if | |
159 | * FIPS is enabled as well. | |
160 | */ | |
161 | if (error == -ENOENT) { | |
162 | printk(KERN_ERR "NFSD: disabling legacy clientid tracking. " | |
163 | "Reboot recovery will not function correctly!\n"); | |
7255e716 | 164 | nfsd4_client_tracking_exit(clp->net); |
2216d449 JL |
165 | } |
166 | } | |
167 | ||
6b189105 SM |
168 | static void |
169 | __nfsd4_create_reclaim_record_grace(struct nfs4_client *clp, | |
170 | const char *dname, int len, struct nfsd_net *nn) | |
171 | { | |
172 | struct xdr_netobj name; | |
6ee95d1c | 173 | struct xdr_netobj princhash = { .len = 0, .data = NULL }; |
6b189105 SM |
174 | struct nfs4_client_reclaim *crp; |
175 | ||
176 | name.data = kmemdup(dname, len, GFP_KERNEL); | |
177 | if (!name.data) { | |
178 | dprintk("%s: failed to allocate memory for name.data!\n", | |
179 | __func__); | |
180 | return; | |
181 | } | |
182 | name.len = len; | |
6ee95d1c | 183 | crp = nfs4_client_to_reclaim(name, princhash, nn); |
6b189105 SM |
184 | if (!crp) { |
185 | kfree(name.data); | |
186 | return; | |
187 | } | |
188 | crp->cr_clp = clp; | |
189 | } | |
190 | ||
2a4317c5 JL |
191 | static void |
192 | nfsd4_create_clid_dir(struct nfs4_client *clp) | |
c7b9a459 | 193 | { |
d84f4f99 | 194 | const struct cred *original_cred; |
2216d449 | 195 | char dname[HEXDIR_LEN]; |
e970a573 | 196 | struct dentry *dir, *dentry; |
c7b9a459 | 197 | int status; |
52e19c09 | 198 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
c7b9a459 | 199 | |
a52d726b | 200 | if (test_and_set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
7a6ef8c7 | 201 | return; |
3a073369 | 202 | if (!nn->rec_file) |
7a6ef8c7 | 203 | return; |
2216d449 JL |
204 | |
205 | status = nfs4_make_rec_clidname(dname, &clp->cl_name); | |
206 | if (status) | |
7255e716 | 207 | return legacy_recdir_name_error(clp, status); |
2216d449 | 208 | |
d84f4f99 DH |
209 | status = nfs4_save_creds(&original_cred); |
210 | if (status < 0) | |
7a6ef8c7 | 211 | return; |
c7b9a459 | 212 | |
3a073369 | 213 | status = mnt_want_write_file(nn->rec_file); |
4a55c101 | 214 | if (status) |
c2236f14 | 215 | goto out_creds; |
4a55c101 | 216 | |
3a073369 | 217 | dir = nn->rec_file->f_path.dentry; |
c7b9a459 | 218 | /* lock the parent */ |
5955102c | 219 | inode_lock(d_inode(dir)); |
c7b9a459 | 220 | |
e970a573 | 221 | dentry = lookup_one_len(dname, dir, HEXDIR_LEN-1); |
c7b9a459 N |
222 | if (IS_ERR(dentry)) { |
223 | status = PTR_ERR(dentry); | |
224 | goto out_unlock; | |
225 | } | |
2b0143b5 | 226 | if (d_really_is_positive(dentry)) |
aec39680 BF |
227 | /* |
228 | * In the 4.1 case, where we're called from | |
229 | * reclaim_complete(), records from the previous reboot | |
230 | * may still be left, so this is OK. | |
231 | * | |
232 | * In the 4.0 case, we should never get here; but we may | |
233 | * as well be forgiving and just succeed silently. | |
234 | */ | |
c7b9a459 | 235 | goto out_put; |
6521f891 | 236 | status = vfs_mkdir(&init_user_ns, d_inode(dir), dentry, S_IRWXU); |
c7b9a459 N |
237 | out_put: |
238 | dput(dentry); | |
239 | out_unlock: | |
5955102c | 240 | inode_unlock(d_inode(dir)); |
0ce0c2b5 | 241 | if (status == 0) { |
6b189105 SM |
242 | if (nn->in_grace) |
243 | __nfsd4_create_reclaim_record_grace(clp, dname, | |
244 | HEXDIR_LEN, nn); | |
3a073369 | 245 | vfs_fsync(nn->rec_file, 0); |
0ce0c2b5 | 246 | } else { |
6577aac0 BH |
247 | printk(KERN_ERR "NFSD: failed to write recovery record" |
248 | " (err %d); please check that %s exists" | |
249 | " and is writeable", status, | |
250 | user_recovery_dirname); | |
0ce0c2b5 | 251 | } |
3a073369 | 252 | mnt_drop_write_file(nn->rec_file); |
c2236f14 | 253 | out_creds: |
d84f4f99 | 254 | nfs4_reset_creds(original_cred); |
c7b9a459 N |
255 | } |
256 | ||
52e19c09 | 257 | typedef int (recdir_func)(struct dentry *, struct dentry *, struct nfsd_net *); |
190e4fbf | 258 | |
05f4f678 BF |
259 | struct name_list { |
260 | char name[HEXDIR_LEN]; | |
190e4fbf N |
261 | struct list_head list; |
262 | }; | |
263 | ||
bb6f619b AV |
264 | struct nfs4_dir_ctx { |
265 | struct dir_context ctx; | |
266 | struct list_head names; | |
267 | }; | |
268 | ||
190e4fbf | 269 | static int |
ac7576f4 | 270 | nfsd4_build_namelist(struct dir_context *__ctx, const char *name, int namlen, |
afefdbb2 | 271 | loff_t offset, u64 ino, unsigned int d_type) |
190e4fbf | 272 | { |
ac7576f4 MS |
273 | struct nfs4_dir_ctx *ctx = |
274 | container_of(__ctx, struct nfs4_dir_ctx, ctx); | |
05f4f678 | 275 | struct name_list *entry; |
190e4fbf | 276 | |
05f4f678 | 277 | if (namlen != HEXDIR_LEN - 1) |
b37ad28b | 278 | return 0; |
05f4f678 BF |
279 | entry = kmalloc(sizeof(struct name_list), GFP_KERNEL); |
280 | if (entry == NULL) | |
190e4fbf | 281 | return -ENOMEM; |
05f4f678 BF |
282 | memcpy(entry->name, name, HEXDIR_LEN - 1); |
283 | entry->name[HEXDIR_LEN - 1] = '\0'; | |
bb6f619b | 284 | list_add(&entry->list, &ctx->names); |
190e4fbf N |
285 | return 0; |
286 | } | |
287 | ||
288 | static int | |
52e19c09 | 289 | nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn) |
190e4fbf | 290 | { |
d84f4f99 | 291 | const struct cred *original_cred; |
3a073369 | 292 | struct dentry *dir = nn->rec_file->f_path.dentry; |
ac6614b7 AV |
293 | struct nfs4_dir_ctx ctx = { |
294 | .ctx.actor = nfsd4_build_namelist, | |
295 | .names = LIST_HEAD_INIT(ctx.names) | |
296 | }; | |
4691b271 | 297 | struct name_list *entry, *tmp; |
190e4fbf N |
298 | int status; |
299 | ||
d84f4f99 DH |
300 | status = nfs4_save_creds(&original_cred); |
301 | if (status < 0) | |
302 | return status; | |
190e4fbf | 303 | |
3a073369 | 304 | status = vfs_llseek(nn->rec_file, 0, SEEK_SET); |
5b4b299c AV |
305 | if (status < 0) { |
306 | nfs4_reset_creds(original_cred); | |
307 | return status; | |
308 | } | |
309 | ||
5c0ba4e0 | 310 | status = iterate_dir(nn->rec_file, &ctx.ctx); |
5955102c | 311 | inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); |
4691b271 KM |
312 | |
313 | list_for_each_entry_safe(entry, tmp, &ctx.names, list) { | |
5b4b299c AV |
314 | if (!status) { |
315 | struct dentry *dentry; | |
316 | dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1); | |
317 | if (IS_ERR(dentry)) { | |
318 | status = PTR_ERR(dentry); | |
319 | break; | |
320 | } | |
52e19c09 | 321 | status = f(dir, dentry, nn); |
5b4b299c | 322 | dput(dentry); |
05f4f678 | 323 | } |
05f4f678 BF |
324 | list_del(&entry->list); |
325 | kfree(entry); | |
190e4fbf | 326 | } |
5955102c | 327 | inode_unlock(d_inode(dir)); |
d84f4f99 | 328 | nfs4_reset_creds(original_cred); |
4691b271 KM |
329 | |
330 | list_for_each_entry_safe(entry, tmp, &ctx.names, list) { | |
331 | dprintk("NFSD: %s. Left entry %s\n", __func__, entry->name); | |
332 | list_del(&entry->list); | |
333 | kfree(entry); | |
334 | } | |
190e4fbf N |
335 | return status; |
336 | } | |
337 | ||
c7b9a459 | 338 | static int |
3a073369 | 339 | nfsd4_unlink_clid_dir(char *name, int namlen, struct nfsd_net *nn) |
c7b9a459 | 340 | { |
e970a573 | 341 | struct dentry *dir, *dentry; |
c7b9a459 N |
342 | int status; |
343 | ||
344 | dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name); | |
345 | ||
3a073369 | 346 | dir = nn->rec_file->f_path.dentry; |
5955102c | 347 | inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); |
e970a573 | 348 | dentry = lookup_one_len(name, dir, namlen); |
c7b9a459 N |
349 | if (IS_ERR(dentry)) { |
350 | status = PTR_ERR(dentry); | |
2f9092e1 | 351 | goto out_unlock; |
c7b9a459 N |
352 | } |
353 | status = -ENOENT; | |
2b0143b5 | 354 | if (d_really_is_negative(dentry)) |
c7b9a459 | 355 | goto out; |
6521f891 | 356 | status = vfs_rmdir(&init_user_ns, d_inode(dir), dentry); |
c7b9a459 N |
357 | out: |
358 | dput(dentry); | |
2f9092e1 | 359 | out_unlock: |
5955102c | 360 | inode_unlock(d_inode(dir)); |
c7b9a459 N |
361 | return status; |
362 | } | |
363 | ||
6b189105 SM |
364 | static void |
365 | __nfsd4_remove_reclaim_record_grace(const char *dname, int len, | |
366 | struct nfsd_net *nn) | |
367 | { | |
368 | struct xdr_netobj name; | |
369 | struct nfs4_client_reclaim *crp; | |
370 | ||
371 | name.data = kmemdup(dname, len, GFP_KERNEL); | |
372 | if (!name.data) { | |
373 | dprintk("%s: failed to allocate memory for name.data!\n", | |
374 | __func__); | |
375 | return; | |
376 | } | |
377 | name.len = len; | |
378 | crp = nfsd4_find_reclaim_client(name, nn); | |
379 | kfree(name.data); | |
380 | if (crp) | |
381 | nfs4_remove_reclaim_record(crp, nn); | |
382 | } | |
383 | ||
2a4317c5 | 384 | static void |
c7b9a459 N |
385 | nfsd4_remove_clid_dir(struct nfs4_client *clp) |
386 | { | |
d84f4f99 | 387 | const struct cred *original_cred; |
2216d449 | 388 | char dname[HEXDIR_LEN]; |
c7b9a459 | 389 | int status; |
52e19c09 | 390 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
c7b9a459 | 391 | |
3a073369 | 392 | if (!nn->rec_file || !test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
c7b9a459 N |
393 | return; |
394 | ||
2216d449 JL |
395 | status = nfs4_make_rec_clidname(dname, &clp->cl_name); |
396 | if (status) | |
7255e716 | 397 | return legacy_recdir_name_error(clp, status); |
2216d449 | 398 | |
3a073369 | 399 | status = mnt_want_write_file(nn->rec_file); |
0622753b DH |
400 | if (status) |
401 | goto out; | |
a52d726b | 402 | clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
d84f4f99 DH |
403 | |
404 | status = nfs4_save_creds(&original_cred); | |
405 | if (status < 0) | |
698d8d87 | 406 | goto out_drop_write; |
d84f4f99 | 407 | |
3a073369 | 408 | status = nfsd4_unlink_clid_dir(dname, HEXDIR_LEN-1, nn); |
d84f4f99 | 409 | nfs4_reset_creds(original_cred); |
0ce0c2b5 | 410 | if (status == 0) { |
3a073369 | 411 | vfs_fsync(nn->rec_file, 0); |
6b189105 SM |
412 | if (nn->in_grace) |
413 | __nfsd4_remove_reclaim_record_grace(dname, | |
414 | HEXDIR_LEN, nn); | |
0ce0c2b5 | 415 | } |
698d8d87 | 416 | out_drop_write: |
3a073369 | 417 | mnt_drop_write_file(nn->rec_file); |
0622753b | 418 | out: |
c7b9a459 N |
419 | if (status) |
420 | printk("NFSD: Failed to remove expired client state directory" | |
2216d449 | 421 | " %.*s\n", HEXDIR_LEN, dname); |
c7b9a459 N |
422 | } |
423 | ||
424 | static int | |
52e19c09 | 425 | purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) |
c7b9a459 N |
426 | { |
427 | int status; | |
6b189105 | 428 | struct xdr_netobj name; |
c7b9a459 | 429 | |
6b189105 SM |
430 | if (child->d_name.len != HEXDIR_LEN - 1) { |
431 | printk("%s: illegal name %pd in recovery directory\n", | |
432 | __func__, child); | |
433 | /* Keep trying; maybe the others are OK: */ | |
b37ad28b | 434 | return 0; |
6b189105 SM |
435 | } |
436 | name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL); | |
437 | if (!name.data) { | |
438 | dprintk("%s: failed to allocate memory for name.data!\n", | |
439 | __func__); | |
440 | goto out; | |
441 | } | |
442 | name.len = HEXDIR_LEN; | |
443 | if (nfs4_has_reclaimed_state(name, nn)) | |
444 | goto out_free; | |
c7b9a459 | 445 | |
6521f891 | 446 | status = vfs_rmdir(&init_user_ns, d_inode(parent), child); |
c7b9a459 | 447 | if (status) |
a6a9f18f AV |
448 | printk("failed to remove client recovery directory %pd\n", |
449 | child); | |
6b189105 SM |
450 | out_free: |
451 | kfree(name.data); | |
452 | out: | |
c7b9a459 | 453 | /* Keep trying, success or failure: */ |
b37ad28b | 454 | return 0; |
c7b9a459 N |
455 | } |
456 | ||
2a4317c5 | 457 | static void |
919b8049 | 458 | nfsd4_recdir_purge_old(struct nfsd_net *nn) |
2a4317c5 | 459 | { |
c7b9a459 N |
460 | int status; |
461 | ||
f141f79d | 462 | nn->in_grace = false; |
3a073369 | 463 | if (!nn->rec_file) |
c7b9a459 | 464 | return; |
3a073369 | 465 | status = mnt_want_write_file(nn->rec_file); |
0622753b DH |
466 | if (status) |
467 | goto out; | |
52e19c09 | 468 | status = nfsd4_list_rec_dir(purge_old, nn); |
c7b9a459 | 469 | if (status == 0) |
3a073369 SK |
470 | vfs_fsync(nn->rec_file, 0); |
471 | mnt_drop_write_file(nn->rec_file); | |
0622753b | 472 | out: |
52e19c09 | 473 | nfs4_release_reclaim(nn); |
c7b9a459 N |
474 | if (status) |
475 | printk("nfsd4: failed to purge old clients from recovery" | |
a6a9f18f | 476 | " directory %pD\n", nn->rec_file); |
c7b9a459 N |
477 | } |
478 | ||
190e4fbf | 479 | static int |
52e19c09 | 480 | load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn) |
190e4fbf | 481 | { |
6b189105 | 482 | struct xdr_netobj name; |
6ee95d1c | 483 | struct xdr_netobj princhash = { .len = 0, .data = NULL }; |
6b189105 | 484 | |
190e4fbf | 485 | if (child->d_name.len != HEXDIR_LEN - 1) { |
6b189105 SM |
486 | printk("%s: illegal name %pd in recovery directory\n", |
487 | __func__, child); | |
190e4fbf | 488 | /* Keep trying; maybe the others are OK: */ |
b37ad28b | 489 | return 0; |
190e4fbf | 490 | } |
6b189105 SM |
491 | name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL); |
492 | if (!name.data) { | |
493 | dprintk("%s: failed to allocate memory for name.data!\n", | |
494 | __func__); | |
495 | goto out; | |
496 | } | |
497 | name.len = HEXDIR_LEN; | |
6ee95d1c | 498 | if (!nfs4_client_to_reclaim(name, princhash, nn)) |
6b189105 SM |
499 | kfree(name.data); |
500 | out: | |
b37ad28b | 501 | return 0; |
190e4fbf N |
502 | } |
503 | ||
2a4317c5 | 504 | static int |
52e19c09 | 505 | nfsd4_recdir_load(struct net *net) { |
190e4fbf | 506 | int status; |
52e19c09 | 507 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
190e4fbf | 508 | |
3a073369 | 509 | if (!nn->rec_file) |
e970a573 CH |
510 | return 0; |
511 | ||
52e19c09 | 512 | status = nfsd4_list_rec_dir(load_recdir, nn); |
190e4fbf N |
513 | if (status) |
514 | printk("nfsd4: failed loading clients from recovery" | |
a6a9f18f | 515 | " directory %pD\n", nn->rec_file); |
190e4fbf N |
516 | return status; |
517 | } | |
518 | ||
519 | /* | |
520 | * Hold reference to the recovery directory. | |
521 | */ | |
522 | ||
2a4317c5 | 523 | static int |
3a073369 | 524 | nfsd4_init_recdir(struct net *net) |
190e4fbf | 525 | { |
3a073369 | 526 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
d84f4f99 DH |
527 | const struct cred *original_cred; |
528 | int status; | |
190e4fbf N |
529 | |
530 | printk("NFSD: Using %s as the NFSv4 state recovery directory\n", | |
48483bf2 | 531 | user_recovery_dirname); |
190e4fbf | 532 | |
3a073369 | 533 | BUG_ON(nn->rec_file); |
190e4fbf | 534 | |
d84f4f99 DH |
535 | status = nfs4_save_creds(&original_cred); |
536 | if (status < 0) { | |
537 | printk("NFSD: Unable to change credentials to find recovery" | |
538 | " directory: error %d\n", | |
539 | status); | |
2a4317c5 | 540 | return status; |
d84f4f99 | 541 | } |
190e4fbf | 542 | |
3a073369 SK |
543 | nn->rec_file = filp_open(user_recovery_dirname, O_RDONLY | O_DIRECTORY, 0); |
544 | if (IS_ERR(nn->rec_file)) { | |
c2642ab0 | 545 | printk("NFSD: unable to find recovery directory %s\n", |
48483bf2 | 546 | user_recovery_dirname); |
3a073369 SK |
547 | status = PTR_ERR(nn->rec_file); |
548 | nn->rec_file = NULL; | |
e970a573 | 549 | } |
190e4fbf | 550 | |
d84f4f99 | 551 | nfs4_reset_creds(original_cred); |
0ce0c2b5 | 552 | if (!status) |
f141f79d | 553 | nn->in_grace = true; |
2a4317c5 | 554 | return status; |
190e4fbf N |
555 | } |
556 | ||
15d176c1 KM |
557 | static void |
558 | nfsd4_shutdown_recdir(struct net *net) | |
559 | { | |
560 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
561 | ||
562 | if (!nn->rec_file) | |
563 | return; | |
564 | fput(nn->rec_file); | |
565 | nn->rec_file = NULL; | |
566 | } | |
52e19c09 SK |
567 | |
568 | static int | |
569 | nfs4_legacy_state_init(struct net *net) | |
570 | { | |
571 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
572 | int i; | |
573 | ||
6da2ec56 KC |
574 | nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, |
575 | sizeof(struct list_head), | |
576 | GFP_KERNEL); | |
52e19c09 SK |
577 | if (!nn->reclaim_str_hashtbl) |
578 | return -ENOMEM; | |
579 | ||
580 | for (i = 0; i < CLIENT_HASH_SIZE; i++) | |
581 | INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]); | |
582 | nn->reclaim_str_hashtbl_size = 0; | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | static void | |
588 | nfs4_legacy_state_shutdown(struct net *net) | |
589 | { | |
590 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
591 | ||
592 | kfree(nn->reclaim_str_hashtbl); | |
593 | } | |
594 | ||
2a4317c5 JL |
595 | static int |
596 | nfsd4_load_reboot_recovery_data(struct net *net) | |
597 | { | |
598 | int status; | |
599 | ||
3a073369 | 600 | status = nfsd4_init_recdir(net); |
52e19c09 | 601 | if (status) |
15d176c1 KM |
602 | return status; |
603 | ||
604 | status = nfsd4_recdir_load(net); | |
605 | if (status) | |
606 | nfsd4_shutdown_recdir(net); | |
607 | ||
52e19c09 SK |
608 | return status; |
609 | } | |
610 | ||
611 | static int | |
612 | nfsd4_legacy_tracking_init(struct net *net) | |
613 | { | |
614 | int status; | |
615 | ||
cc27e0d4 JL |
616 | /* XXX: The legacy code won't work in a container */ |
617 | if (net != &init_net) { | |
46cc8ba3 | 618 | pr_warn("NFSD: attempt to initialize legacy client tracking in a container ignored.\n"); |
cc27e0d4 JL |
619 | return -EINVAL; |
620 | } | |
621 | ||
52e19c09 | 622 | status = nfs4_legacy_state_init(net); |
2a4317c5 | 623 | if (status) |
52e19c09 SK |
624 | return status; |
625 | ||
626 | status = nfsd4_load_reboot_recovery_data(net); | |
627 | if (status) | |
628 | goto err; | |
f988a7b7 | 629 | pr_info("NFSD: Using legacy client tracking operations.\n"); |
52e19c09 SK |
630 | return 0; |
631 | ||
632 | err: | |
633 | nfs4_legacy_state_shutdown(net); | |
2a4317c5 JL |
634 | return status; |
635 | } | |
636 | ||
2a4317c5 JL |
637 | static void |
638 | nfsd4_legacy_tracking_exit(struct net *net) | |
639 | { | |
52e19c09 SK |
640 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
641 | ||
642 | nfs4_release_reclaim(nn); | |
15d176c1 | 643 | nfsd4_shutdown_recdir(net); |
52e19c09 | 644 | nfs4_legacy_state_shutdown(net); |
2a4317c5 JL |
645 | } |
646 | ||
48483bf2 BF |
647 | /* |
648 | * Change the NFSv4 recovery directory to recdir. | |
649 | */ | |
650 | int | |
651 | nfs4_reset_recoverydir(char *recdir) | |
652 | { | |
653 | int status; | |
654 | struct path path; | |
655 | ||
656 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); | |
657 | if (status) | |
658 | return status; | |
659 | status = -ENOTDIR; | |
e36cb0b8 | 660 | if (d_is_dir(path.dentry)) { |
48483bf2 BF |
661 | strcpy(user_recovery_dirname, recdir); |
662 | status = 0; | |
663 | } | |
664 | path_put(&path); | |
665 | return status; | |
666 | } | |
667 | ||
668 | char * | |
669 | nfs4_recoverydir(void) | |
670 | { | |
671 | return user_recovery_dirname; | |
672 | } | |
2a4317c5 JL |
673 | |
674 | static int | |
675 | nfsd4_check_legacy_client(struct nfs4_client *clp) | |
676 | { | |
2216d449 JL |
677 | int status; |
678 | char dname[HEXDIR_LEN]; | |
0ce0c2b5 | 679 | struct nfs4_client_reclaim *crp; |
52e19c09 | 680 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
6b189105 | 681 | struct xdr_netobj name; |
0ce0c2b5 | 682 | |
2a4317c5 JL |
683 | /* did we already find that this client is stable? */ |
684 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
685 | return 0; | |
686 | ||
2216d449 JL |
687 | status = nfs4_make_rec_clidname(dname, &clp->cl_name); |
688 | if (status) { | |
7255e716 | 689 | legacy_recdir_name_error(clp, status); |
2216d449 JL |
690 | return status; |
691 | } | |
692 | ||
2a4317c5 | 693 | /* look for it in the reclaim hashtable otherwise */ |
6b189105 SM |
694 | name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); |
695 | if (!name.data) { | |
696 | dprintk("%s: failed to allocate memory for name.data!\n", | |
697 | __func__); | |
698 | goto out_enoent; | |
699 | } | |
700 | name.len = HEXDIR_LEN; | |
701 | crp = nfsd4_find_reclaim_client(name, nn); | |
702 | kfree(name.data); | |
0ce0c2b5 | 703 | if (crp) { |
2a4317c5 | 704 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
0ce0c2b5 | 705 | crp->cr_clp = clp; |
2a4317c5 JL |
706 | return 0; |
707 | } | |
708 | ||
6b189105 | 709 | out_enoent: |
2a4317c5 JL |
710 | return -ENOENT; |
711 | } | |
712 | ||
7c582e4f | 713 | static const struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = { |
52e19c09 | 714 | .init = nfsd4_legacy_tracking_init, |
2a4317c5 JL |
715 | .exit = nfsd4_legacy_tracking_exit, |
716 | .create = nfsd4_create_clid_dir, | |
717 | .remove = nfsd4_remove_clid_dir, | |
718 | .check = nfsd4_check_legacy_client, | |
719 | .grace_done = nfsd4_recdir_purge_old, | |
11a60d15 SM |
720 | .version = 1, |
721 | .msglen = 0, | |
2a4317c5 JL |
722 | }; |
723 | ||
f3f80148 JL |
724 | /* Globals */ |
725 | #define NFSD_PIPE_DIR "nfsd" | |
726 | #define NFSD_CLD_PIPE "cld" | |
727 | ||
728 | /* per-net-ns structure for holding cld upcall info */ | |
729 | struct cld_net { | |
730 | struct rpc_pipe *cn_pipe; | |
731 | spinlock_t cn_lock; | |
732 | struct list_head cn_list; | |
733 | unsigned int cn_xid; | |
8a9f4f41 | 734 | bool cn_has_legacy; |
6ee95d1c | 735 | struct crypto_shash *cn_tfm; |
f3f80148 JL |
736 | }; |
737 | ||
738 | struct cld_upcall { | |
739 | struct list_head cu_list; | |
740 | struct cld_net *cu_net; | |
b493fd31 | 741 | struct completion cu_done; |
11a60d15 SM |
742 | union { |
743 | struct cld_msg_hdr cu_hdr; | |
744 | struct cld_msg cu_msg; | |
6ee95d1c | 745 | struct cld_msg_v2 cu_msg_v2; |
11a60d15 | 746 | } cu_u; |
f3f80148 JL |
747 | }; |
748 | ||
749 | static int | |
df60446c | 750 | __cld_pipe_upcall(struct rpc_pipe *pipe, void *cmsg, struct nfsd_net *nn) |
f3f80148 JL |
751 | { |
752 | int ret; | |
753 | struct rpc_pipe_msg msg; | |
11a60d15 | 754 | struct cld_upcall *cup = container_of(cmsg, struct cld_upcall, cu_u); |
f3f80148 JL |
755 | |
756 | memset(&msg, 0, sizeof(msg)); | |
757 | msg.data = cmsg; | |
11a60d15 | 758 | msg.len = nn->client_tracking_ops->msglen; |
f3f80148 | 759 | |
f3f80148 JL |
760 | ret = rpc_queue_upcall(pipe, &msg); |
761 | if (ret < 0) { | |
f3f80148 JL |
762 | goto out; |
763 | } | |
764 | ||
b493fd31 | 765 | wait_for_completion(&cup->cu_done); |
f3f80148 JL |
766 | |
767 | if (msg.errno < 0) | |
768 | ret = msg.errno; | |
769 | out: | |
770 | return ret; | |
771 | } | |
772 | ||
773 | static int | |
df60446c | 774 | cld_pipe_upcall(struct rpc_pipe *pipe, void *cmsg, struct nfsd_net *nn) |
f3f80148 JL |
775 | { |
776 | int ret; | |
777 | ||
778 | /* | |
779 | * -EAGAIN occurs when pipe is closed and reopened while there are | |
780 | * upcalls queued. | |
781 | */ | |
782 | do { | |
df60446c | 783 | ret = __cld_pipe_upcall(pipe, cmsg, nn); |
f3f80148 JL |
784 | } while (ret == -EAGAIN); |
785 | ||
786 | return ret; | |
787 | } | |
788 | ||
74725959 | 789 | static ssize_t |
6ee95d1c | 790 | __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg, |
74725959 SM |
791 | struct nfsd_net *nn) |
792 | { | |
6ee95d1c SM |
793 | uint8_t cmd, princhashlen; |
794 | struct xdr_netobj name, princhash = { .len = 0, .data = NULL }; | |
74725959 | 795 | uint16_t namelen; |
8a9f4f41 | 796 | struct cld_net *cn = nn->cld_net; |
74725959 SM |
797 | |
798 | if (get_user(cmd, &cmsg->cm_cmd)) { | |
799 | dprintk("%s: error when copying cmd from userspace", __func__); | |
800 | return -EFAULT; | |
801 | } | |
802 | if (cmd == Cld_GraceStart) { | |
6ee95d1c SM |
803 | if (nn->client_tracking_ops->version >= 2) { |
804 | const struct cld_clntinfo __user *ci; | |
805 | ||
806 | ci = &cmsg->cm_u.cm_clntinfo; | |
807 | if (get_user(namelen, &ci->cc_name.cn_len)) | |
808 | return -EFAULT; | |
809 | name.data = memdup_user(&ci->cc_name.cn_id, namelen); | |
810 | if (IS_ERR_OR_NULL(name.data)) | |
811 | return -EFAULT; | |
812 | name.len = namelen; | |
813 | get_user(princhashlen, &ci->cc_princhash.cp_len); | |
814 | if (princhashlen > 0) { | |
815 | princhash.data = memdup_user( | |
816 | &ci->cc_princhash.cp_data, | |
817 | princhashlen); | |
818 | if (IS_ERR_OR_NULL(princhash.data)) | |
819 | return -EFAULT; | |
820 | princhash.len = princhashlen; | |
821 | } else | |
822 | princhash.len = 0; | |
823 | } else { | |
824 | const struct cld_name __user *cnm; | |
825 | ||
826 | cnm = &cmsg->cm_u.cm_name; | |
827 | if (get_user(namelen, &cnm->cn_len)) | |
828 | return -EFAULT; | |
829 | name.data = memdup_user(&cnm->cn_id, namelen); | |
830 | if (IS_ERR_OR_NULL(name.data)) | |
831 | return -EFAULT; | |
832 | name.len = namelen; | |
833 | } | |
8a9f4f41 SM |
834 | if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) { |
835 | name.len = name.len - 5; | |
836 | memmove(name.data, name.data + 5, name.len); | |
837 | cn->cn_has_legacy = true; | |
838 | } | |
6ee95d1c | 839 | if (!nfs4_client_to_reclaim(name, princhash, nn)) { |
74725959 | 840 | kfree(name.data); |
6ee95d1c | 841 | kfree(princhash.data); |
74725959 SM |
842 | return -EFAULT; |
843 | } | |
11a60d15 | 844 | return nn->client_tracking_ops->msglen; |
74725959 SM |
845 | } |
846 | return -EFAULT; | |
847 | } | |
848 | ||
f3f80148 JL |
849 | static ssize_t |
850 | cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) | |
851 | { | |
852 | struct cld_upcall *tmp, *cup; | |
11a60d15 | 853 | struct cld_msg_hdr __user *hdr = (struct cld_msg_hdr __user *)src; |
6ee95d1c | 854 | struct cld_msg_v2 __user *cmsg = (struct cld_msg_v2 __user *)src; |
f3f80148 | 855 | uint32_t xid; |
ef8a1a10 | 856 | struct nfsd_net *nn = net_generic(file_inode(filp)->i_sb->s_fs_info, |
f3f80148 JL |
857 | nfsd_net_id); |
858 | struct cld_net *cn = nn->cld_net; | |
74725959 | 859 | int16_t status; |
f3f80148 | 860 | |
11a60d15 | 861 | if (mlen != nn->client_tracking_ops->msglen) { |
8a7dc4b0 | 862 | dprintk("%s: got %zu bytes, expected %zu\n", __func__, mlen, |
11a60d15 | 863 | nn->client_tracking_ops->msglen); |
f3f80148 JL |
864 | return -EINVAL; |
865 | } | |
866 | ||
867 | /* copy just the xid so we can try to find that */ | |
11a60d15 | 868 | if (copy_from_user(&xid, &hdr->cm_xid, sizeof(xid)) != 0) { |
f3f80148 JL |
869 | dprintk("%s: error when copying xid from userspace", __func__); |
870 | return -EFAULT; | |
871 | } | |
872 | ||
74725959 SM |
873 | /* |
874 | * copy the status so we know whether to remove the upcall from the | |
875 | * list (for -EINPROGRESS, we just want to make sure the xid is | |
876 | * valid, not remove the upcall from the list) | |
877 | */ | |
11a60d15 | 878 | if (get_user(status, &hdr->cm_status)) { |
74725959 SM |
879 | dprintk("%s: error when copying status from userspace", __func__); |
880 | return -EFAULT; | |
881 | } | |
882 | ||
f3f80148 JL |
883 | /* walk the list and find corresponding xid */ |
884 | cup = NULL; | |
885 | spin_lock(&cn->cn_lock); | |
886 | list_for_each_entry(tmp, &cn->cn_list, cu_list) { | |
11a60d15 | 887 | if (get_unaligned(&tmp->cu_u.cu_hdr.cm_xid) == xid) { |
f3f80148 | 888 | cup = tmp; |
74725959 SM |
889 | if (status != -EINPROGRESS) |
890 | list_del_init(&cup->cu_list); | |
f3f80148 JL |
891 | break; |
892 | } | |
893 | } | |
894 | spin_unlock(&cn->cn_lock); | |
895 | ||
896 | /* couldn't find upcall? */ | |
897 | if (!cup) { | |
21f72c9f | 898 | dprintk("%s: couldn't find upcall -- xid=%u\n", __func__, xid); |
f3f80148 JL |
899 | return -EINVAL; |
900 | } | |
901 | ||
74725959 SM |
902 | if (status == -EINPROGRESS) |
903 | return __cld_pipe_inprogress_downcall(cmsg, nn); | |
904 | ||
6ee95d1c | 905 | if (copy_from_user(&cup->cu_u.cu_msg_v2, src, mlen) != 0) |
f3f80148 JL |
906 | return -EFAULT; |
907 | ||
b493fd31 | 908 | complete(&cup->cu_done); |
f3f80148 JL |
909 | return mlen; |
910 | } | |
911 | ||
912 | static void | |
913 | cld_pipe_destroy_msg(struct rpc_pipe_msg *msg) | |
914 | { | |
915 | struct cld_msg *cmsg = msg->data; | |
916 | struct cld_upcall *cup = container_of(cmsg, struct cld_upcall, | |
11a60d15 | 917 | cu_u.cu_msg); |
f3f80148 JL |
918 | |
919 | /* errno >= 0 means we got a downcall */ | |
920 | if (msg->errno >= 0) | |
921 | return; | |
922 | ||
b493fd31 | 923 | complete(&cup->cu_done); |
f3f80148 JL |
924 | } |
925 | ||
926 | static const struct rpc_pipe_ops cld_upcall_ops = { | |
927 | .upcall = rpc_pipe_generic_upcall, | |
928 | .downcall = cld_pipe_downcall, | |
929 | .destroy_msg = cld_pipe_destroy_msg, | |
930 | }; | |
931 | ||
932 | static struct dentry * | |
933 | nfsd4_cld_register_sb(struct super_block *sb, struct rpc_pipe *pipe) | |
934 | { | |
935 | struct dentry *dir, *dentry; | |
936 | ||
937 | dir = rpc_d_lookup_sb(sb, NFSD_PIPE_DIR); | |
938 | if (dir == NULL) | |
939 | return ERR_PTR(-ENOENT); | |
940 | dentry = rpc_mkpipe_dentry(dir, NFSD_CLD_PIPE, NULL, pipe); | |
941 | dput(dir); | |
942 | return dentry; | |
943 | } | |
944 | ||
945 | static void | |
946 | nfsd4_cld_unregister_sb(struct rpc_pipe *pipe) | |
947 | { | |
948 | if (pipe->dentry) | |
949 | rpc_unlink(pipe->dentry); | |
950 | } | |
951 | ||
952 | static struct dentry * | |
953 | nfsd4_cld_register_net(struct net *net, struct rpc_pipe *pipe) | |
954 | { | |
955 | struct super_block *sb; | |
956 | struct dentry *dentry; | |
957 | ||
958 | sb = rpc_get_sb_net(net); | |
959 | if (!sb) | |
960 | return NULL; | |
961 | dentry = nfsd4_cld_register_sb(sb, pipe); | |
962 | rpc_put_sb_net(net); | |
963 | return dentry; | |
964 | } | |
965 | ||
966 | static void | |
967 | nfsd4_cld_unregister_net(struct net *net, struct rpc_pipe *pipe) | |
968 | { | |
969 | struct super_block *sb; | |
970 | ||
971 | sb = rpc_get_sb_net(net); | |
972 | if (sb) { | |
973 | nfsd4_cld_unregister_sb(pipe); | |
974 | rpc_put_sb_net(net); | |
975 | } | |
976 | } | |
977 | ||
978 | /* Initialize rpc_pipefs pipe for communication with client tracking daemon */ | |
979 | static int | |
86921607 | 980 | __nfsd4_init_cld_pipe(struct net *net) |
f3f80148 JL |
981 | { |
982 | int ret; | |
983 | struct dentry *dentry; | |
984 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
985 | struct cld_net *cn; | |
986 | ||
987 | if (nn->cld_net) | |
988 | return 0; | |
989 | ||
990 | cn = kzalloc(sizeof(*cn), GFP_KERNEL); | |
991 | if (!cn) { | |
992 | ret = -ENOMEM; | |
993 | goto err; | |
994 | } | |
995 | ||
996 | cn->cn_pipe = rpc_mkpipe_data(&cld_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); | |
997 | if (IS_ERR(cn->cn_pipe)) { | |
998 | ret = PTR_ERR(cn->cn_pipe); | |
999 | goto err; | |
1000 | } | |
1001 | spin_lock_init(&cn->cn_lock); | |
1002 | INIT_LIST_HEAD(&cn->cn_list); | |
1003 | ||
1004 | dentry = nfsd4_cld_register_net(net, cn->cn_pipe); | |
1005 | if (IS_ERR(dentry)) { | |
1006 | ret = PTR_ERR(dentry); | |
1007 | goto err_destroy_data; | |
1008 | } | |
1009 | ||
1010 | cn->cn_pipe->dentry = dentry; | |
8a9f4f41 | 1011 | cn->cn_has_legacy = false; |
f3f80148 JL |
1012 | nn->cld_net = cn; |
1013 | return 0; | |
1014 | ||
1015 | err_destroy_data: | |
1016 | rpc_destroy_pipe_data(cn->cn_pipe); | |
1017 | err: | |
1018 | kfree(cn); | |
1019 | printk(KERN_ERR "NFSD: unable to create nfsdcld upcall pipe (%d)\n", | |
1020 | ret); | |
1021 | return ret; | |
1022 | } | |
1023 | ||
86921607 SM |
1024 | static int |
1025 | nfsd4_init_cld_pipe(struct net *net) | |
1026 | { | |
1027 | int status; | |
1028 | ||
1029 | status = __nfsd4_init_cld_pipe(net); | |
1030 | if (!status) | |
f988a7b7 | 1031 | pr_info("NFSD: Using old nfsdcld client tracking operations.\n"); |
86921607 SM |
1032 | return status; |
1033 | } | |
1034 | ||
f3f80148 JL |
1035 | static void |
1036 | nfsd4_remove_cld_pipe(struct net *net) | |
1037 | { | |
1038 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1039 | struct cld_net *cn = nn->cld_net; | |
1040 | ||
1041 | nfsd4_cld_unregister_net(net, cn->cn_pipe); | |
1042 | rpc_destroy_pipe_data(cn->cn_pipe); | |
6ee95d1c SM |
1043 | if (cn->cn_tfm) |
1044 | crypto_free_shash(cn->cn_tfm); | |
f3f80148 JL |
1045 | kfree(nn->cld_net); |
1046 | nn->cld_net = NULL; | |
1047 | } | |
1048 | ||
1049 | static struct cld_upcall * | |
11a60d15 | 1050 | alloc_cld_upcall(struct nfsd_net *nn) |
f3f80148 JL |
1051 | { |
1052 | struct cld_upcall *new, *tmp; | |
11a60d15 | 1053 | struct cld_net *cn = nn->cld_net; |
f3f80148 JL |
1054 | |
1055 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
1056 | if (!new) | |
1057 | return new; | |
1058 | ||
1059 | /* FIXME: hard cap on number in flight? */ | |
1060 | restart_search: | |
1061 | spin_lock(&cn->cn_lock); | |
1062 | list_for_each_entry(tmp, &cn->cn_list, cu_list) { | |
11a60d15 | 1063 | if (tmp->cu_u.cu_msg.cm_xid == cn->cn_xid) { |
f3f80148 JL |
1064 | cn->cn_xid++; |
1065 | spin_unlock(&cn->cn_lock); | |
1066 | goto restart_search; | |
1067 | } | |
1068 | } | |
b493fd31 | 1069 | init_completion(&new->cu_done); |
11a60d15 SM |
1070 | new->cu_u.cu_msg.cm_vers = nn->client_tracking_ops->version; |
1071 | put_unaligned(cn->cn_xid++, &new->cu_u.cu_msg.cm_xid); | |
f3f80148 JL |
1072 | new->cu_net = cn; |
1073 | list_add(&new->cu_list, &cn->cn_list); | |
1074 | spin_unlock(&cn->cn_lock); | |
1075 | ||
11a60d15 | 1076 | dprintk("%s: allocated xid %u\n", __func__, new->cu_u.cu_msg.cm_xid); |
f3f80148 JL |
1077 | |
1078 | return new; | |
1079 | } | |
1080 | ||
1081 | static void | |
1082 | free_cld_upcall(struct cld_upcall *victim) | |
1083 | { | |
1084 | struct cld_net *cn = victim->cu_net; | |
1085 | ||
1086 | spin_lock(&cn->cn_lock); | |
1087 | list_del(&victim->cu_list); | |
1088 | spin_unlock(&cn->cn_lock); | |
1089 | kfree(victim); | |
1090 | } | |
1091 | ||
1092 | /* Ask daemon to create a new record */ | |
1093 | static void | |
1094 | nfsd4_cld_create(struct nfs4_client *clp) | |
1095 | { | |
1096 | int ret; | |
1097 | struct cld_upcall *cup; | |
c212cecf | 1098 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f80148 JL |
1099 | struct cld_net *cn = nn->cld_net; |
1100 | ||
1101 | /* Don't upcall if it's already stored */ | |
1102 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1103 | return; | |
1104 | ||
11a60d15 | 1105 | cup = alloc_cld_upcall(nn); |
f3f80148 JL |
1106 | if (!cup) { |
1107 | ret = -ENOMEM; | |
1108 | goto out_err; | |
1109 | } | |
1110 | ||
11a60d15 SM |
1111 | cup->cu_u.cu_msg.cm_cmd = Cld_Create; |
1112 | cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; | |
1113 | memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, | |
f3f80148 JL |
1114 | clp->cl_name.len); |
1115 | ||
df60446c | 1116 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f80148 | 1117 | if (!ret) { |
11a60d15 | 1118 | ret = cup->cu_u.cu_msg.cm_status; |
f3f80148 JL |
1119 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
1120 | } | |
1121 | ||
1122 | free_cld_upcall(cup); | |
1123 | out_err: | |
1124 | if (ret) | |
1125 | printk(KERN_ERR "NFSD: Unable to create client " | |
1126 | "record on stable storage: %d\n", ret); | |
1127 | } | |
1128 | ||
6ee95d1c SM |
1129 | /* Ask daemon to create a new record */ |
1130 | static void | |
1131 | nfsd4_cld_create_v2(struct nfs4_client *clp) | |
1132 | { | |
1133 | int ret; | |
1134 | struct cld_upcall *cup; | |
1135 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1136 | struct cld_net *cn = nn->cld_net; | |
1137 | struct cld_msg_v2 *cmsg; | |
1138 | struct crypto_shash *tfm = cn->cn_tfm; | |
1139 | struct xdr_netobj cksum; | |
1140 | char *principal = NULL; | |
6ee95d1c SM |
1141 | |
1142 | /* Don't upcall if it's already stored */ | |
1143 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1144 | return; | |
1145 | ||
1146 | cup = alloc_cld_upcall(nn); | |
1147 | if (!cup) { | |
1148 | ret = -ENOMEM; | |
1149 | goto out_err; | |
1150 | } | |
1151 | ||
1152 | cmsg = &cup->cu_u.cu_msg_v2; | |
1153 | cmsg->cm_cmd = Cld_Create; | |
1154 | cmsg->cm_u.cm_clntinfo.cc_name.cn_len = clp->cl_name.len; | |
1155 | memcpy(cmsg->cm_u.cm_clntinfo.cc_name.cn_id, clp->cl_name.data, | |
1156 | clp->cl_name.len); | |
1157 | if (clp->cl_cred.cr_raw_principal) | |
1158 | principal = clp->cl_cred.cr_raw_principal; | |
1159 | else if (clp->cl_cred.cr_principal) | |
1160 | principal = clp->cl_cred.cr_principal; | |
1161 | if (principal) { | |
6ee95d1c SM |
1162 | cksum.len = crypto_shash_digestsize(tfm); |
1163 | cksum.data = kmalloc(cksum.len, GFP_KERNEL); | |
1164 | if (cksum.data == NULL) { | |
1165 | ret = -ENOMEM; | |
1166 | goto out; | |
1167 | } | |
ea794db2 EB |
1168 | ret = crypto_shash_tfm_digest(tfm, principal, strlen(principal), |
1169 | cksum.data); | |
6ee95d1c SM |
1170 | if (ret) { |
1171 | kfree(cksum.data); | |
1172 | goto out; | |
1173 | } | |
1174 | cmsg->cm_u.cm_clntinfo.cc_princhash.cp_len = cksum.len; | |
1175 | memcpy(cmsg->cm_u.cm_clntinfo.cc_princhash.cp_data, | |
1176 | cksum.data, cksum.len); | |
1177 | kfree(cksum.data); | |
1178 | } else | |
1179 | cmsg->cm_u.cm_clntinfo.cc_princhash.cp_len = 0; | |
1180 | ||
df60446c | 1181 | ret = cld_pipe_upcall(cn->cn_pipe, cmsg, nn); |
6ee95d1c SM |
1182 | if (!ret) { |
1183 | ret = cmsg->cm_status; | |
1184 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); | |
1185 | } | |
1186 | ||
1187 | out: | |
1188 | free_cld_upcall(cup); | |
1189 | out_err: | |
1190 | if (ret) | |
1191 | pr_err("NFSD: Unable to create client record on stable storage: %d\n", | |
1192 | ret); | |
1193 | } | |
1194 | ||
f3f80148 JL |
1195 | /* Ask daemon to create a new record */ |
1196 | static void | |
1197 | nfsd4_cld_remove(struct nfs4_client *clp) | |
1198 | { | |
1199 | int ret; | |
1200 | struct cld_upcall *cup; | |
c212cecf | 1201 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f80148 JL |
1202 | struct cld_net *cn = nn->cld_net; |
1203 | ||
1204 | /* Don't upcall if it's already removed */ | |
1205 | if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1206 | return; | |
1207 | ||
11a60d15 | 1208 | cup = alloc_cld_upcall(nn); |
f3f80148 JL |
1209 | if (!cup) { |
1210 | ret = -ENOMEM; | |
1211 | goto out_err; | |
1212 | } | |
1213 | ||
11a60d15 SM |
1214 | cup->cu_u.cu_msg.cm_cmd = Cld_Remove; |
1215 | cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; | |
1216 | memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, | |
f3f80148 JL |
1217 | clp->cl_name.len); |
1218 | ||
df60446c | 1219 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f80148 | 1220 | if (!ret) { |
11a60d15 | 1221 | ret = cup->cu_u.cu_msg.cm_status; |
f3f80148 JL |
1222 | clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
1223 | } | |
1224 | ||
1225 | free_cld_upcall(cup); | |
1226 | out_err: | |
1227 | if (ret) | |
1228 | printk(KERN_ERR "NFSD: Unable to remove client " | |
1229 | "record from stable storage: %d\n", ret); | |
1230 | } | |
1231 | ||
74725959 SM |
1232 | /* |
1233 | * For older nfsdcld's that do not allow us to "slurp" the clients | |
1234 | * from the tracking database during startup. | |
1235 | * | |
1236 | * Check for presence of a record, and update its timestamp | |
1237 | */ | |
f3f80148 | 1238 | static int |
74725959 | 1239 | nfsd4_cld_check_v0(struct nfs4_client *clp) |
f3f80148 JL |
1240 | { |
1241 | int ret; | |
1242 | struct cld_upcall *cup; | |
c212cecf | 1243 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
f3f80148 JL |
1244 | struct cld_net *cn = nn->cld_net; |
1245 | ||
1246 | /* Don't upcall if one was already stored during this grace pd */ | |
1247 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1248 | return 0; | |
1249 | ||
11a60d15 | 1250 | cup = alloc_cld_upcall(nn); |
f3f80148 JL |
1251 | if (!cup) { |
1252 | printk(KERN_ERR "NFSD: Unable to check client record on " | |
1253 | "stable storage: %d\n", -ENOMEM); | |
1254 | return -ENOMEM; | |
1255 | } | |
1256 | ||
11a60d15 SM |
1257 | cup->cu_u.cu_msg.cm_cmd = Cld_Check; |
1258 | cup->cu_u.cu_msg.cm_u.cm_name.cn_len = clp->cl_name.len; | |
1259 | memcpy(cup->cu_u.cu_msg.cm_u.cm_name.cn_id, clp->cl_name.data, | |
f3f80148 JL |
1260 | clp->cl_name.len); |
1261 | ||
df60446c | 1262 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f80148 | 1263 | if (!ret) { |
11a60d15 | 1264 | ret = cup->cu_u.cu_msg.cm_status; |
f3f80148 JL |
1265 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
1266 | } | |
1267 | ||
1268 | free_cld_upcall(cup); | |
1269 | return ret; | |
1270 | } | |
1271 | ||
74725959 SM |
1272 | /* |
1273 | * For newer nfsdcld's that allow us to "slurp" the clients | |
1274 | * from the tracking database during startup. | |
1275 | * | |
1276 | * Check for presence of a record in the reclaim_str_hashtbl | |
1277 | */ | |
1278 | static int | |
1279 | nfsd4_cld_check(struct nfs4_client *clp) | |
1280 | { | |
1281 | struct nfs4_client_reclaim *crp; | |
1282 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
8a9f4f41 SM |
1283 | struct cld_net *cn = nn->cld_net; |
1284 | int status; | |
1285 | char dname[HEXDIR_LEN]; | |
1286 | struct xdr_netobj name; | |
74725959 SM |
1287 | |
1288 | /* did we already find that this client is stable? */ | |
1289 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1290 | return 0; | |
1291 | ||
1292 | /* look for it in the reclaim hashtable otherwise */ | |
1293 | crp = nfsd4_find_reclaim_client(clp->cl_name, nn); | |
8a9f4f41 SM |
1294 | if (crp) |
1295 | goto found; | |
1296 | ||
1297 | if (cn->cn_has_legacy) { | |
1298 | status = nfs4_make_rec_clidname(dname, &clp->cl_name); | |
1299 | if (status) | |
1300 | return -ENOENT; | |
1301 | ||
1302 | name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); | |
1303 | if (!name.data) { | |
1304 | dprintk("%s: failed to allocate memory for name.data!\n", | |
1305 | __func__); | |
1306 | return -ENOENT; | |
1307 | } | |
1308 | name.len = HEXDIR_LEN; | |
1309 | crp = nfsd4_find_reclaim_client(name, nn); | |
1310 | kfree(name.data); | |
1311 | if (crp) | |
1312 | goto found; | |
74725959 | 1313 | |
8a9f4f41 | 1314 | } |
74725959 | 1315 | return -ENOENT; |
8a9f4f41 SM |
1316 | found: |
1317 | crp->cr_clp = clp; | |
1318 | return 0; | |
74725959 SM |
1319 | } |
1320 | ||
6ee95d1c SM |
1321 | static int |
1322 | nfsd4_cld_check_v2(struct nfs4_client *clp) | |
1323 | { | |
1324 | struct nfs4_client_reclaim *crp; | |
1325 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
1326 | struct cld_net *cn = nn->cld_net; | |
1327 | int status; | |
1328 | char dname[HEXDIR_LEN]; | |
1329 | struct xdr_netobj name; | |
1330 | struct crypto_shash *tfm = cn->cn_tfm; | |
1331 | struct xdr_netobj cksum; | |
1332 | char *principal = NULL; | |
6ee95d1c SM |
1333 | |
1334 | /* did we already find that this client is stable? */ | |
1335 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1336 | return 0; | |
1337 | ||
1338 | /* look for it in the reclaim hashtable otherwise */ | |
1339 | crp = nfsd4_find_reclaim_client(clp->cl_name, nn); | |
1340 | if (crp) | |
1341 | goto found; | |
1342 | ||
1343 | if (cn->cn_has_legacy) { | |
1344 | status = nfs4_make_rec_clidname(dname, &clp->cl_name); | |
1345 | if (status) | |
1346 | return -ENOENT; | |
1347 | ||
1348 | name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL); | |
1349 | if (!name.data) { | |
1350 | dprintk("%s: failed to allocate memory for name.data\n", | |
1351 | __func__); | |
1352 | return -ENOENT; | |
1353 | } | |
1354 | name.len = HEXDIR_LEN; | |
1355 | crp = nfsd4_find_reclaim_client(name, nn); | |
1356 | kfree(name.data); | |
1357 | if (crp) | |
1358 | goto found; | |
1359 | ||
1360 | } | |
1361 | return -ENOENT; | |
1362 | found: | |
1363 | if (crp->cr_princhash.len) { | |
1364 | if (clp->cl_cred.cr_raw_principal) | |
1365 | principal = clp->cl_cred.cr_raw_principal; | |
1366 | else if (clp->cl_cred.cr_principal) | |
1367 | principal = clp->cl_cred.cr_principal; | |
1368 | if (principal == NULL) | |
1369 | return -ENOENT; | |
6ee95d1c SM |
1370 | cksum.len = crypto_shash_digestsize(tfm); |
1371 | cksum.data = kmalloc(cksum.len, GFP_KERNEL); | |
1372 | if (cksum.data == NULL) | |
1373 | return -ENOENT; | |
ea794db2 EB |
1374 | status = crypto_shash_tfm_digest(tfm, principal, |
1375 | strlen(principal), cksum.data); | |
6ee95d1c SM |
1376 | if (status) { |
1377 | kfree(cksum.data); | |
1378 | return -ENOENT; | |
1379 | } | |
1380 | if (memcmp(crp->cr_princhash.data, cksum.data, | |
1381 | crp->cr_princhash.len)) { | |
1382 | kfree(cksum.data); | |
1383 | return -ENOENT; | |
1384 | } | |
1385 | kfree(cksum.data); | |
1386 | } | |
1387 | crp->cr_clp = clp; | |
1388 | return 0; | |
1389 | } | |
1390 | ||
74725959 SM |
1391 | static int |
1392 | nfsd4_cld_grace_start(struct nfsd_net *nn) | |
1393 | { | |
1394 | int ret; | |
1395 | struct cld_upcall *cup; | |
1396 | struct cld_net *cn = nn->cld_net; | |
1397 | ||
11a60d15 | 1398 | cup = alloc_cld_upcall(nn); |
74725959 SM |
1399 | if (!cup) { |
1400 | ret = -ENOMEM; | |
1401 | goto out_err; | |
1402 | } | |
1403 | ||
11a60d15 | 1404 | cup->cu_u.cu_msg.cm_cmd = Cld_GraceStart; |
df60446c | 1405 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
74725959 | 1406 | if (!ret) |
11a60d15 | 1407 | ret = cup->cu_u.cu_msg.cm_status; |
74725959 SM |
1408 | |
1409 | free_cld_upcall(cup); | |
1410 | out_err: | |
1411 | if (ret) | |
1412 | dprintk("%s: Unable to get clients from userspace: %d\n", | |
1413 | __func__, ret); | |
1414 | return ret; | |
1415 | } | |
1416 | ||
1417 | /* For older nfsdcld's that need cm_gracetime */ | |
f3f80148 | 1418 | static void |
74725959 | 1419 | nfsd4_cld_grace_done_v0(struct nfsd_net *nn) |
f3f80148 JL |
1420 | { |
1421 | int ret; | |
1422 | struct cld_upcall *cup; | |
f3f80148 JL |
1423 | struct cld_net *cn = nn->cld_net; |
1424 | ||
11a60d15 | 1425 | cup = alloc_cld_upcall(nn); |
f3f80148 JL |
1426 | if (!cup) { |
1427 | ret = -ENOMEM; | |
1428 | goto out_err; | |
1429 | } | |
1430 | ||
11a60d15 | 1431 | cup->cu_u.cu_msg.cm_cmd = Cld_GraceDone; |
9cc76801 | 1432 | cup->cu_u.cu_msg.cm_u.cm_gracetime = nn->boot_time; |
df60446c | 1433 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
f3f80148 | 1434 | if (!ret) |
11a60d15 | 1435 | ret = cup->cu_u.cu_msg.cm_status; |
f3f80148 JL |
1436 | |
1437 | free_cld_upcall(cup); | |
1438 | out_err: | |
1439 | if (ret) | |
1440 | printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret); | |
1441 | } | |
1442 | ||
74725959 SM |
1443 | /* |
1444 | * For newer nfsdcld's that do not need cm_gracetime. We also need to call | |
1445 | * nfs4_release_reclaim() to clear out the reclaim_str_hashtbl. | |
1446 | */ | |
1447 | static void | |
1448 | nfsd4_cld_grace_done(struct nfsd_net *nn) | |
1449 | { | |
1450 | int ret; | |
1451 | struct cld_upcall *cup; | |
1452 | struct cld_net *cn = nn->cld_net; | |
1453 | ||
11a60d15 | 1454 | cup = alloc_cld_upcall(nn); |
74725959 SM |
1455 | if (!cup) { |
1456 | ret = -ENOMEM; | |
1457 | goto out_err; | |
1458 | } | |
1459 | ||
11a60d15 | 1460 | cup->cu_u.cu_msg.cm_cmd = Cld_GraceDone; |
df60446c | 1461 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
74725959 | 1462 | if (!ret) |
11a60d15 | 1463 | ret = cup->cu_u.cu_msg.cm_status; |
74725959 SM |
1464 | |
1465 | free_cld_upcall(cup); | |
1466 | out_err: | |
1467 | nfs4_release_reclaim(nn); | |
1468 | if (ret) | |
1469 | printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret); | |
1470 | } | |
1471 | ||
1472 | static int | |
1473 | nfs4_cld_state_init(struct net *net) | |
1474 | { | |
1475 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1476 | int i; | |
1477 | ||
1478 | nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, | |
1479 | sizeof(struct list_head), | |
1480 | GFP_KERNEL); | |
1481 | if (!nn->reclaim_str_hashtbl) | |
1482 | return -ENOMEM; | |
1483 | ||
1484 | for (i = 0; i < CLIENT_HASH_SIZE; i++) | |
1485 | INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]); | |
1486 | nn->reclaim_str_hashtbl_size = 0; | |
362063a5 SM |
1487 | nn->track_reclaim_completes = true; |
1488 | atomic_set(&nn->nr_reclaim_complete, 0); | |
74725959 SM |
1489 | |
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static void | |
1494 | nfs4_cld_state_shutdown(struct net *net) | |
1495 | { | |
1496 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1497 | ||
362063a5 | 1498 | nn->track_reclaim_completes = false; |
74725959 SM |
1499 | kfree(nn->reclaim_str_hashtbl); |
1500 | } | |
1501 | ||
86921607 SM |
1502 | static bool |
1503 | cld_running(struct nfsd_net *nn) | |
1504 | { | |
1505 | struct cld_net *cn = nn->cld_net; | |
1506 | struct rpc_pipe *pipe = cn->cn_pipe; | |
1507 | ||
1508 | return pipe->nreaders || pipe->nwriters; | |
1509 | } | |
1510 | ||
11a60d15 SM |
1511 | static int |
1512 | nfsd4_cld_get_version(struct nfsd_net *nn) | |
1513 | { | |
1514 | int ret = 0; | |
1515 | struct cld_upcall *cup; | |
1516 | struct cld_net *cn = nn->cld_net; | |
1517 | uint8_t version; | |
1518 | ||
1519 | cup = alloc_cld_upcall(nn); | |
1520 | if (!cup) { | |
1521 | ret = -ENOMEM; | |
1522 | goto out_err; | |
1523 | } | |
1524 | cup->cu_u.cu_msg.cm_cmd = Cld_GetVersion; | |
df60446c | 1525 | ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_u.cu_msg, nn); |
11a60d15 SM |
1526 | if (!ret) { |
1527 | ret = cup->cu_u.cu_msg.cm_status; | |
1528 | if (ret) | |
1529 | goto out_free; | |
1530 | version = cup->cu_u.cu_msg.cm_u.cm_version; | |
1531 | dprintk("%s: userspace returned version %u\n", | |
1532 | __func__, version); | |
1533 | if (version < 1) | |
1534 | version = 1; | |
1535 | else if (version > CLD_UPCALL_VERSION) | |
1536 | version = CLD_UPCALL_VERSION; | |
1537 | ||
1538 | switch (version) { | |
1539 | case 1: | |
1540 | nn->client_tracking_ops = &nfsd4_cld_tracking_ops; | |
1541 | break; | |
6ee95d1c SM |
1542 | case 2: |
1543 | nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v2; | |
1544 | break; | |
11a60d15 SM |
1545 | default: |
1546 | break; | |
1547 | } | |
1548 | } | |
1549 | out_free: | |
1550 | free_cld_upcall(cup); | |
1551 | out_err: | |
1552 | if (ret) | |
1553 | dprintk("%s: Unable to get version from userspace: %d\n", | |
1554 | __func__, ret); | |
1555 | return ret; | |
1556 | } | |
1557 | ||
74725959 SM |
1558 | static int |
1559 | nfsd4_cld_tracking_init(struct net *net) | |
1560 | { | |
1561 | int status; | |
1562 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
86921607 SM |
1563 | bool running; |
1564 | int retries = 10; | |
18b9a895 | 1565 | struct crypto_shash *tfm; |
74725959 SM |
1566 | |
1567 | status = nfs4_cld_state_init(net); | |
1568 | if (status) | |
1569 | return status; | |
1570 | ||
86921607 | 1571 | status = __nfsd4_init_cld_pipe(net); |
74725959 SM |
1572 | if (status) |
1573 | goto err_shutdown; | |
1574 | ||
86921607 SM |
1575 | /* |
1576 | * rpc pipe upcalls take 30 seconds to time out, so we don't want to | |
1577 | * queue an upcall unless we know that nfsdcld is running (because we | |
1578 | * want this to fail fast so that nfsd4_client_tracking_init() can try | |
1579 | * the next client tracking method). nfsdcld should already be running | |
1580 | * before nfsd is started, so the wait here is for nfsdcld to open the | |
1581 | * pipefs file we just created. | |
1582 | */ | |
1583 | while (!(running = cld_running(nn)) && retries--) | |
1584 | msleep(100); | |
1585 | ||
1586 | if (!running) { | |
1587 | status = -ETIMEDOUT; | |
1588 | goto err_remove; | |
1589 | } | |
18b9a895 SM |
1590 | tfm = crypto_alloc_shash("sha256", 0, 0); |
1591 | if (IS_ERR(tfm)) { | |
1592 | status = PTR_ERR(tfm); | |
1593 | goto err_remove; | |
1594 | } | |
1595 | nn->cld_net->cn_tfm = tfm; | |
86921607 | 1596 | |
11a60d15 SM |
1597 | status = nfsd4_cld_get_version(nn); |
1598 | if (status == -EOPNOTSUPP) | |
1599 | pr_warn("NFSD: nfsdcld GetVersion upcall failed. Please upgrade nfsdcld.\n"); | |
1600 | ||
74725959 SM |
1601 | status = nfsd4_cld_grace_start(nn); |
1602 | if (status) { | |
1603 | if (status == -EOPNOTSUPP) | |
11a60d15 | 1604 | pr_warn("NFSD: nfsdcld GraceStart upcall failed. Please upgrade nfsdcld.\n"); |
74725959 SM |
1605 | nfs4_release_reclaim(nn); |
1606 | goto err_remove; | |
86921607 | 1607 | } else |
f988a7b7 | 1608 | pr_info("NFSD: Using nfsdcld client tracking operations.\n"); |
74725959 SM |
1609 | return 0; |
1610 | ||
1611 | err_remove: | |
1612 | nfsd4_remove_cld_pipe(net); | |
1613 | err_shutdown: | |
1614 | nfs4_cld_state_shutdown(net); | |
1615 | return status; | |
1616 | } | |
1617 | ||
1618 | static void | |
1619 | nfsd4_cld_tracking_exit(struct net *net) | |
1620 | { | |
1621 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1622 | ||
1623 | nfs4_release_reclaim(nn); | |
1624 | nfsd4_remove_cld_pipe(net); | |
1625 | nfs4_cld_state_shutdown(net); | |
1626 | } | |
1627 | ||
1628 | /* For older nfsdcld's */ | |
1629 | static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v0 = { | |
f3f80148 JL |
1630 | .init = nfsd4_init_cld_pipe, |
1631 | .exit = nfsd4_remove_cld_pipe, | |
1632 | .create = nfsd4_cld_create, | |
1633 | .remove = nfsd4_cld_remove, | |
74725959 SM |
1634 | .check = nfsd4_cld_check_v0, |
1635 | .grace_done = nfsd4_cld_grace_done_v0, | |
11a60d15 SM |
1636 | .version = 1, |
1637 | .msglen = sizeof(struct cld_msg), | |
74725959 SM |
1638 | }; |
1639 | ||
1640 | /* For newer nfsdcld's */ | |
1641 | static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = { | |
1642 | .init = nfsd4_cld_tracking_init, | |
1643 | .exit = nfsd4_cld_tracking_exit, | |
1644 | .create = nfsd4_cld_create, | |
1645 | .remove = nfsd4_cld_remove, | |
f3f80148 JL |
1646 | .check = nfsd4_cld_check, |
1647 | .grace_done = nfsd4_cld_grace_done, | |
11a60d15 SM |
1648 | .version = 1, |
1649 | .msglen = sizeof(struct cld_msg), | |
f3f80148 JL |
1650 | }; |
1651 | ||
6ee95d1c SM |
1652 | /* v2 create/check ops include the principal, if available */ |
1653 | static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2 = { | |
1654 | .init = nfsd4_cld_tracking_init, | |
1655 | .exit = nfsd4_cld_tracking_exit, | |
1656 | .create = nfsd4_cld_create_v2, | |
1657 | .remove = nfsd4_cld_remove, | |
1658 | .check = nfsd4_cld_check_v2, | |
1659 | .grace_done = nfsd4_cld_grace_done, | |
1660 | .version = 2, | |
1661 | .msglen = sizeof(struct cld_msg_v2), | |
1662 | }; | |
1663 | ||
2873d214 JL |
1664 | /* upcall via usermodehelper */ |
1665 | static char cltrack_prog[PATH_MAX] = "/sbin/nfsdcltrack"; | |
1666 | module_param_string(cltrack_prog, cltrack_prog, sizeof(cltrack_prog), | |
1667 | S_IRUGO|S_IWUSR); | |
1668 | MODULE_PARM_DESC(cltrack_prog, "Path to the nfsdcltrack upcall program"); | |
1669 | ||
f3aa7e24 JL |
1670 | static bool cltrack_legacy_disable; |
1671 | module_param(cltrack_legacy_disable, bool, S_IRUGO|S_IWUSR); | |
1672 | MODULE_PARM_DESC(cltrack_legacy_disable, | |
1673 | "Disable legacy recoverydir conversion. Default: false"); | |
1674 | ||
1675 | #define LEGACY_TOPDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_TOPDIR=" | |
1676 | #define LEGACY_RECDIR_ENV_PREFIX "NFSDCLTRACK_LEGACY_RECDIR=" | |
d4318acd JL |
1677 | #define HAS_SESSION_ENV_PREFIX "NFSDCLTRACK_CLIENT_HAS_SESSION=" |
1678 | #define GRACE_START_ENV_PREFIX "NFSDCLTRACK_GRACE_START=" | |
f3aa7e24 JL |
1679 | |
1680 | static char * | |
1681 | nfsd4_cltrack_legacy_topdir(void) | |
1682 | { | |
1683 | int copied; | |
1684 | size_t len; | |
1685 | char *result; | |
1686 | ||
1687 | if (cltrack_legacy_disable) | |
1688 | return NULL; | |
1689 | ||
1690 | len = strlen(LEGACY_TOPDIR_ENV_PREFIX) + | |
1691 | strlen(nfs4_recoverydir()) + 1; | |
1692 | ||
1693 | result = kmalloc(len, GFP_KERNEL); | |
1694 | if (!result) | |
1695 | return result; | |
1696 | ||
1697 | copied = snprintf(result, len, LEGACY_TOPDIR_ENV_PREFIX "%s", | |
1698 | nfs4_recoverydir()); | |
1699 | if (copied >= len) { | |
1700 | /* just return nothing if output was truncated */ | |
1701 | kfree(result); | |
1702 | return NULL; | |
1703 | } | |
1704 | ||
1705 | return result; | |
1706 | } | |
1707 | ||
1708 | static char * | |
2216d449 | 1709 | nfsd4_cltrack_legacy_recdir(const struct xdr_netobj *name) |
f3aa7e24 JL |
1710 | { |
1711 | int copied; | |
1712 | size_t len; | |
1713 | char *result; | |
1714 | ||
1715 | if (cltrack_legacy_disable) | |
1716 | return NULL; | |
1717 | ||
1718 | /* +1 is for '/' between "topdir" and "recdir" */ | |
1719 | len = strlen(LEGACY_RECDIR_ENV_PREFIX) + | |
1720 | strlen(nfs4_recoverydir()) + 1 + HEXDIR_LEN; | |
1721 | ||
1722 | result = kmalloc(len, GFP_KERNEL); | |
1723 | if (!result) | |
1724 | return result; | |
1725 | ||
2216d449 JL |
1726 | copied = snprintf(result, len, LEGACY_RECDIR_ENV_PREFIX "%s/", |
1727 | nfs4_recoverydir()); | |
1728 | if (copied > (len - HEXDIR_LEN)) { | |
1729 | /* just return nothing if output will be truncated */ | |
1730 | kfree(result); | |
1731 | return NULL; | |
1732 | } | |
1733 | ||
1734 | copied = nfs4_make_rec_clidname(result + copied, name); | |
1735 | if (copied) { | |
f3aa7e24 JL |
1736 | kfree(result); |
1737 | return NULL; | |
1738 | } | |
1739 | ||
1740 | return result; | |
1741 | } | |
1742 | ||
d4318acd JL |
1743 | static char * |
1744 | nfsd4_cltrack_client_has_session(struct nfs4_client *clp) | |
1745 | { | |
1746 | int copied; | |
1747 | size_t len; | |
1748 | char *result; | |
1749 | ||
1750 | /* prefix + Y/N character + terminating NULL */ | |
1751 | len = strlen(HAS_SESSION_ENV_PREFIX) + 1 + 1; | |
1752 | ||
1753 | result = kmalloc(len, GFP_KERNEL); | |
1754 | if (!result) | |
1755 | return result; | |
1756 | ||
1757 | copied = snprintf(result, len, HAS_SESSION_ENV_PREFIX "%c", | |
1758 | clp->cl_minorversion ? 'Y' : 'N'); | |
1759 | if (copied >= len) { | |
1760 | /* just return nothing if output was truncated */ | |
1761 | kfree(result); | |
1762 | return NULL; | |
1763 | } | |
1764 | ||
1765 | return result; | |
1766 | } | |
1767 | ||
1768 | static char * | |
9cc76801 | 1769 | nfsd4_cltrack_grace_start(time64_t grace_start) |
d4318acd JL |
1770 | { |
1771 | int copied; | |
1772 | size_t len; | |
1773 | char *result; | |
1774 | ||
1775 | /* prefix + max width of int64_t string + terminating NULL */ | |
1776 | len = strlen(GRACE_START_ENV_PREFIX) + 22 + 1; | |
1777 | ||
1778 | result = kmalloc(len, GFP_KERNEL); | |
1779 | if (!result) | |
1780 | return result; | |
1781 | ||
9cc76801 | 1782 | copied = snprintf(result, len, GRACE_START_ENV_PREFIX "%lld", |
d4318acd JL |
1783 | grace_start); |
1784 | if (copied >= len) { | |
1785 | /* just return nothing if output was truncated */ | |
1786 | kfree(result); | |
1787 | return NULL; | |
1788 | } | |
1789 | ||
1790 | return result; | |
1791 | } | |
1792 | ||
2873d214 | 1793 | static int |
d4318acd | 1794 | nfsd4_umh_cltrack_upcall(char *cmd, char *arg, char *env0, char *env1) |
2873d214 | 1795 | { |
d4318acd | 1796 | char *envp[3]; |
2873d214 JL |
1797 | char *argv[4]; |
1798 | int ret; | |
1799 | ||
1800 | if (unlikely(!cltrack_prog[0])) { | |
1801 | dprintk("%s: cltrack_prog is disabled\n", __func__); | |
1802 | return -EACCES; | |
1803 | } | |
1804 | ||
1805 | dprintk("%s: cmd: %s\n", __func__, cmd); | |
1806 | dprintk("%s: arg: %s\n", __func__, arg ? arg : "(null)"); | |
d4318acd JL |
1807 | dprintk("%s: env0: %s\n", __func__, env0 ? env0 : "(null)"); |
1808 | dprintk("%s: env1: %s\n", __func__, env1 ? env1 : "(null)"); | |
f3aa7e24 | 1809 | |
d4318acd JL |
1810 | envp[0] = env0; |
1811 | envp[1] = env1; | |
1812 | envp[2] = NULL; | |
2873d214 JL |
1813 | |
1814 | argv[0] = (char *)cltrack_prog; | |
1815 | argv[1] = cmd; | |
1816 | argv[2] = arg; | |
1817 | argv[3] = NULL; | |
1818 | ||
1819 | ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC); | |
1820 | /* | |
1821 | * Disable the upcall mechanism if we're getting an ENOENT or EACCES | |
1822 | * error. The admin can re-enable it on the fly by using sysfs | |
1823 | * once the problem has been fixed. | |
1824 | */ | |
1825 | if (ret == -ENOENT || ret == -EACCES) { | |
1826 | dprintk("NFSD: %s was not found or isn't executable (%d). " | |
1827 | "Setting cltrack_prog to blank string!", | |
1828 | cltrack_prog, ret); | |
1829 | cltrack_prog[0] = '\0'; | |
1830 | } | |
1831 | dprintk("%s: %s return value: %d\n", __func__, cltrack_prog, ret); | |
1832 | ||
1833 | return ret; | |
1834 | } | |
1835 | ||
1836 | static char * | |
1837 | bin_to_hex_dup(const unsigned char *src, int srclen) | |
1838 | { | |
12b4157b | 1839 | char *buf; |
2873d214 JL |
1840 | |
1841 | /* +1 for terminating NULL */ | |
12b4157b | 1842 | buf = kzalloc((srclen * 2) + 1, GFP_KERNEL); |
2873d214 JL |
1843 | if (!buf) |
1844 | return buf; | |
1845 | ||
12b4157b | 1846 | bin2hex(buf, src, srclen); |
2873d214 JL |
1847 | return buf; |
1848 | } | |
1849 | ||
1850 | static int | |
d4318acd | 1851 | nfsd4_umh_cltrack_init(struct net *net) |
2873d214 | 1852 | { |
d4318acd JL |
1853 | int ret; |
1854 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1855 | char *grace_start = nfsd4_cltrack_grace_start(nn->boot_time); | |
1856 | ||
71a50306 SK |
1857 | /* XXX: The usermode helper s not working in container yet. */ |
1858 | if (net != &init_net) { | |
46cc8ba3 | 1859 | pr_warn("NFSD: attempt to initialize umh client tracking in a container ignored.\n"); |
956ccef3 | 1860 | kfree(grace_start); |
71a50306 SK |
1861 | return -EINVAL; |
1862 | } | |
d4318acd JL |
1863 | |
1864 | ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL); | |
1865 | kfree(grace_start); | |
86921607 | 1866 | if (!ret) |
f988a7b7 | 1867 | pr_info("NFSD: Using UMH upcall client tracking operations.\n"); |
d4318acd | 1868 | return ret; |
2873d214 JL |
1869 | } |
1870 | ||
d682e750 JL |
1871 | static void |
1872 | nfsd4_cltrack_upcall_lock(struct nfs4_client *clp) | |
1873 | { | |
1874 | wait_on_bit_lock(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK, | |
1875 | TASK_UNINTERRUPTIBLE); | |
1876 | } | |
1877 | ||
1878 | static void | |
1879 | nfsd4_cltrack_upcall_unlock(struct nfs4_client *clp) | |
1880 | { | |
1881 | smp_mb__before_atomic(); | |
1882 | clear_bit(NFSD4_CLIENT_UPCALL_LOCK, &clp->cl_flags); | |
1883 | smp_mb__after_atomic(); | |
1884 | wake_up_bit(&clp->cl_flags, NFSD4_CLIENT_UPCALL_LOCK); | |
1885 | } | |
1886 | ||
2873d214 JL |
1887 | static void |
1888 | nfsd4_umh_cltrack_create(struct nfs4_client *clp) | |
1889 | { | |
d4318acd JL |
1890 | char *hexid, *has_session, *grace_start; |
1891 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); | |
2873d214 | 1892 | |
65decb65 JL |
1893 | /* |
1894 | * With v4.0 clients, there's little difference in outcome between a | |
1895 | * create and check operation, and we can end up calling into this | |
1896 | * function multiple times per client (once for each openowner). So, | |
1897 | * for v4.0 clients skip upcalling once the client has been recorded | |
1898 | * on stable storage. | |
1899 | * | |
1900 | * For v4.1+ clients, the outcome of the two operations is different, | |
1901 | * so we must ensure that we upcall for the create operation. v4.1+ | |
1902 | * clients call this on RECLAIM_COMPLETE though, so we should only end | |
1903 | * up doing a single create upcall per client. | |
1904 | */ | |
1905 | if (clp->cl_minorversion == 0 && | |
1906 | test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) | |
1907 | return; | |
1908 | ||
2873d214 JL |
1909 | hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); |
1910 | if (!hexid) { | |
1911 | dprintk("%s: can't allocate memory for upcall!\n", __func__); | |
1912 | return; | |
1913 | } | |
d682e750 | 1914 | |
d4318acd JL |
1915 | has_session = nfsd4_cltrack_client_has_session(clp); |
1916 | grace_start = nfsd4_cltrack_grace_start(nn->boot_time); | |
d682e750 JL |
1917 | |
1918 | nfsd4_cltrack_upcall_lock(clp); | |
788a7914 JL |
1919 | if (!nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start)) |
1920 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); | |
d682e750 JL |
1921 | nfsd4_cltrack_upcall_unlock(clp); |
1922 | ||
d4318acd JL |
1923 | kfree(has_session); |
1924 | kfree(grace_start); | |
2873d214 JL |
1925 | kfree(hexid); |
1926 | } | |
1927 | ||
1928 | static void | |
1929 | nfsd4_umh_cltrack_remove(struct nfs4_client *clp) | |
1930 | { | |
1931 | char *hexid; | |
1932 | ||
788a7914 JL |
1933 | if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
1934 | return; | |
1935 | ||
2873d214 JL |
1936 | hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); |
1937 | if (!hexid) { | |
1938 | dprintk("%s: can't allocate memory for upcall!\n", __func__); | |
1939 | return; | |
1940 | } | |
d682e750 JL |
1941 | |
1942 | nfsd4_cltrack_upcall_lock(clp); | |
788a7914 JL |
1943 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags) && |
1944 | nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL) == 0) | |
1945 | clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); | |
d682e750 JL |
1946 | nfsd4_cltrack_upcall_unlock(clp); |
1947 | ||
2873d214 JL |
1948 | kfree(hexid); |
1949 | } | |
1950 | ||
1951 | static int | |
1952 | nfsd4_umh_cltrack_check(struct nfs4_client *clp) | |
1953 | { | |
1954 | int ret; | |
d4318acd | 1955 | char *hexid, *has_session, *legacy; |
2873d214 | 1956 | |
788a7914 JL |
1957 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) |
1958 | return 0; | |
1959 | ||
2873d214 JL |
1960 | hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); |
1961 | if (!hexid) { | |
1962 | dprintk("%s: can't allocate memory for upcall!\n", __func__); | |
1963 | return -ENOMEM; | |
1964 | } | |
d4318acd JL |
1965 | |
1966 | has_session = nfsd4_cltrack_client_has_session(clp); | |
2216d449 | 1967 | legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name); |
d682e750 JL |
1968 | |
1969 | nfsd4_cltrack_upcall_lock(clp); | |
788a7914 JL |
1970 | if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) { |
1971 | ret = 0; | |
1972 | } else { | |
1973 | ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy); | |
1974 | if (ret == 0) | |
1975 | set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); | |
1976 | } | |
d682e750 | 1977 | nfsd4_cltrack_upcall_unlock(clp); |
d4318acd | 1978 | kfree(has_session); |
f3aa7e24 | 1979 | kfree(legacy); |
2873d214 | 1980 | kfree(hexid); |
d4318acd | 1981 | |
2873d214 JL |
1982 | return ret; |
1983 | } | |
1984 | ||
1985 | static void | |
919b8049 | 1986 | nfsd4_umh_cltrack_grace_done(struct nfsd_net *nn) |
2873d214 | 1987 | { |
f3aa7e24 | 1988 | char *legacy; |
2873d214 JL |
1989 | char timestr[22]; /* FIXME: better way to determine max size? */ |
1990 | ||
9cc76801 | 1991 | sprintf(timestr, "%lld", nn->boot_time); |
f3aa7e24 | 1992 | legacy = nfsd4_cltrack_legacy_topdir(); |
d4318acd | 1993 | nfsd4_umh_cltrack_upcall("gracedone", timestr, legacy, NULL); |
f3aa7e24 | 1994 | kfree(legacy); |
2873d214 JL |
1995 | } |
1996 | ||
7c582e4f | 1997 | static const struct nfsd4_client_tracking_ops nfsd4_umh_tracking_ops = { |
2873d214 JL |
1998 | .init = nfsd4_umh_cltrack_init, |
1999 | .exit = NULL, | |
2000 | .create = nfsd4_umh_cltrack_create, | |
2001 | .remove = nfsd4_umh_cltrack_remove, | |
2002 | .check = nfsd4_umh_cltrack_check, | |
2003 | .grace_done = nfsd4_umh_cltrack_grace_done, | |
11a60d15 SM |
2004 | .version = 1, |
2005 | .msglen = 0, | |
2873d214 JL |
2006 | }; |
2007 | ||
2a4317c5 JL |
2008 | int |
2009 | nfsd4_client_tracking_init(struct net *net) | |
2010 | { | |
2011 | int status; | |
f3f80148 | 2012 | struct path path; |
9a9c6478 | 2013 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2a4317c5 | 2014 | |
2d77bf0a | 2015 | /* just run the init if it the method is already decided */ |
9a9c6478 | 2016 | if (nn->client_tracking_ops) |
2d77bf0a JL |
2017 | goto do_init; |
2018 | ||
86921607 SM |
2019 | /* First, try to use nfsdcld */ |
2020 | nn->client_tracking_ops = &nfsd4_cld_tracking_ops; | |
2021 | status = nn->client_tracking_ops->init(net); | |
2022 | if (!status) | |
2023 | return status; | |
2024 | if (status != -ETIMEDOUT) { | |
2025 | nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0; | |
2026 | status = nn->client_tracking_ops->init(net); | |
2027 | if (!status) | |
2028 | return status; | |
2029 | } | |
2030 | ||
2d77bf0a | 2031 | /* |
86921607 | 2032 | * Next, try the UMH upcall. |
2d77bf0a | 2033 | */ |
9a9c6478 SK |
2034 | nn->client_tracking_ops = &nfsd4_umh_tracking_ops; |
2035 | status = nn->client_tracking_ops->init(net); | |
2d77bf0a JL |
2036 | if (!status) |
2037 | return status; | |
2038 | ||
2039 | /* | |
86921607 SM |
2040 | * Finally, See if the recoverydir exists and is a directory. |
2041 | * If it is, then use the legacy ops. | |
2d77bf0a | 2042 | */ |
9a9c6478 | 2043 | nn->client_tracking_ops = &nfsd4_legacy_tracking_ops; |
2d77bf0a JL |
2044 | status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path); |
2045 | if (!status) { | |
e36cb0b8 | 2046 | status = d_is_dir(path.dentry); |
2d77bf0a | 2047 | path_put(&path); |
86921607 SM |
2048 | if (!status) { |
2049 | status = -EINVAL; | |
2050 | goto out; | |
2051 | } | |
f3f80148 | 2052 | } |
2a4317c5 | 2053 | |
2d77bf0a | 2054 | do_init: |
9a9c6478 | 2055 | status = nn->client_tracking_ops->init(net); |
86921607 | 2056 | out: |
2a4317c5 JL |
2057 | if (status) { |
2058 | printk(KERN_WARNING "NFSD: Unable to initialize client " | |
2059 | "recovery tracking! (%d)\n", status); | |
9a9c6478 | 2060 | nn->client_tracking_ops = NULL; |
2a4317c5 JL |
2061 | } |
2062 | return status; | |
2063 | } | |
2064 | ||
2065 | void | |
2066 | nfsd4_client_tracking_exit(struct net *net) | |
2067 | { | |
9a9c6478 SK |
2068 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
2069 | ||
2070 | if (nn->client_tracking_ops) { | |
2071 | if (nn->client_tracking_ops->exit) | |
2072 | nn->client_tracking_ops->exit(net); | |
2073 | nn->client_tracking_ops = NULL; | |
2a4317c5 JL |
2074 | } |
2075 | } | |
2076 | ||
2077 | void | |
2078 | nfsd4_client_record_create(struct nfs4_client *clp) | |
2079 | { | |
9a9c6478 SK |
2080 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2081 | ||
2082 | if (nn->client_tracking_ops) | |
2083 | nn->client_tracking_ops->create(clp); | |
2a4317c5 JL |
2084 | } |
2085 | ||
2086 | void | |
2087 | nfsd4_client_record_remove(struct nfs4_client *clp) | |
2088 | { | |
9a9c6478 SK |
2089 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2090 | ||
2091 | if (nn->client_tracking_ops) | |
2092 | nn->client_tracking_ops->remove(clp); | |
2a4317c5 JL |
2093 | } |
2094 | ||
2095 | int | |
2096 | nfsd4_client_record_check(struct nfs4_client *clp) | |
2097 | { | |
9a9c6478 SK |
2098 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
2099 | ||
2100 | if (nn->client_tracking_ops) | |
2101 | return nn->client_tracking_ops->check(clp); | |
2a4317c5 JL |
2102 | |
2103 | return -EOPNOTSUPP; | |
2104 | } | |
2105 | ||
2106 | void | |
919b8049 | 2107 | nfsd4_record_grace_done(struct nfsd_net *nn) |
2a4317c5 | 2108 | { |
9a9c6478 | 2109 | if (nn->client_tracking_ops) |
919b8049 | 2110 | nn->client_tracking_ops->grace_done(nn); |
2a4317c5 | 2111 | } |
813fd320 JL |
2112 | |
2113 | static int | |
2114 | rpc_pipefs_event(struct notifier_block *nb, unsigned long event, void *ptr) | |
2115 | { | |
2116 | struct super_block *sb = ptr; | |
2117 | struct net *net = sb->s_fs_info; | |
2118 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
2119 | struct cld_net *cn = nn->cld_net; | |
2120 | struct dentry *dentry; | |
2121 | int ret = 0; | |
2122 | ||
2123 | if (!try_module_get(THIS_MODULE)) | |
2124 | return 0; | |
2125 | ||
2126 | if (!cn) { | |
2127 | module_put(THIS_MODULE); | |
2128 | return 0; | |
2129 | } | |
2130 | ||
2131 | switch (event) { | |
2132 | case RPC_PIPEFS_MOUNT: | |
2133 | dentry = nfsd4_cld_register_sb(sb, cn->cn_pipe); | |
2134 | if (IS_ERR(dentry)) { | |
2135 | ret = PTR_ERR(dentry); | |
2136 | break; | |
2137 | } | |
2138 | cn->cn_pipe->dentry = dentry; | |
2139 | break; | |
2140 | case RPC_PIPEFS_UMOUNT: | |
2141 | if (cn->cn_pipe->dentry) | |
2142 | nfsd4_cld_unregister_sb(cn->cn_pipe); | |
2143 | break; | |
2144 | default: | |
2145 | ret = -ENOTSUPP; | |
2146 | break; | |
2147 | } | |
2148 | module_put(THIS_MODULE); | |
2149 | return ret; | |
2150 | } | |
2151 | ||
2355c596 | 2152 | static struct notifier_block nfsd4_cld_block = { |
813fd320 JL |
2153 | .notifier_call = rpc_pipefs_event, |
2154 | }; | |
797a9d79 JL |
2155 | |
2156 | int | |
2157 | register_cld_notifier(void) | |
2158 | { | |
8a7598ec | 2159 | WARN_ON(!nfsd_net_id); |
797a9d79 JL |
2160 | return rpc_pipefs_notifier_register(&nfsd4_cld_block); |
2161 | } | |
2162 | ||
2163 | void | |
2164 | unregister_cld_notifier(void) | |
2165 | { | |
2166 | rpc_pipefs_notifier_unregister(&nfsd4_cld_block); | |
2167 | } |