Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #define MSNFS /* HACK HACK */ |
| 2 | /* |
| 3 | * linux/fs/nfsd/export.c |
| 4 | * |
| 5 | * NFS exporting and validation. |
| 6 | * |
| 7 | * We maintain a list of clients, each of which has a list of |
| 8 | * exports. To export an fs to a given client, you first have |
| 9 | * to create the client entry with NFSCTL_ADDCLIENT, which |
| 10 | * creates a client control block and adds it to the hash |
| 11 | * table. Then, you call NFSCTL_EXPORT for each fs. |
| 12 | * |
| 13 | * |
| 14 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> |
| 15 | */ |
| 16 | |
| 17 | #include <linux/unistd.h> |
| 18 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/stat.h> |
| 20 | #include <linux/in.h> |
| 21 | #include <linux/seq_file.h> |
| 22 | #include <linux/syscalls.h> |
| 23 | #include <linux/rwsem.h> |
| 24 | #include <linux/dcache.h> |
| 25 | #include <linux/namei.h> |
| 26 | #include <linux/mount.h> |
| 27 | #include <linux/hash.h> |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 29 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | #include <linux/sunrpc/svc.h> |
| 32 | #include <linux/nfsd/nfsd.h> |
| 33 | #include <linux/nfsd/nfsfh.h> |
| 34 | #include <linux/nfsd/syscall.h> |
| 35 | #include <linux/lockd/bind.h> |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 36 | #include <linux/sunrpc/msg_prot.h> |
| 37 | #include <linux/sunrpc/gss_api.h> |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 38 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | typedef struct auth_domain svc_client; |
| 43 | typedef struct svc_export svc_export; |
| 44 | |
| 45 | static void exp_do_unexport(svc_export *unexp); |
| 46 | static int exp_verify_string(char *cp, int max); |
| 47 | |
| 48 | /* |
| 49 | * We have two caches. |
| 50 | * One maps client+vfsmnt+dentry to export options - the export map |
| 51 | * The other maps client+filehandle-fragment to export options. - the expkey map |
| 52 | * |
| 53 | * The export options are actually stored in the first map, and the |
| 54 | * second map contains a reference to the entry in the first map. |
| 55 | */ |
| 56 | |
| 57 | #define EXPKEY_HASHBITS 8 |
| 58 | #define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS) |
| 59 | #define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1) |
| 60 | static struct cache_head *expkey_table[EXPKEY_HASHMAX]; |
| 61 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 62 | static void expkey_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 64 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
| 65 | |
| 66 | if (test_bit(CACHE_VALID, &key->h.flags) && |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 67 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
| 68 | path_put(&key->ek_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 69 | auth_domain_put(key->ek_client); |
| 70 | kfree(key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | static void expkey_request(struct cache_detail *cd, |
| 74 | struct cache_head *h, |
| 75 | char **bpp, int *blen) |
| 76 | { |
| 77 | /* client fsidtype \xfsid */ |
| 78 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); |
| 79 | char type[5]; |
| 80 | |
| 81 | qword_add(bpp, blen, ek->ek_client->name); |
| 82 | snprintf(type, 5, "%d", ek->ek_fsidtype); |
| 83 | qword_add(bpp, blen, type); |
| 84 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); |
| 85 | (*bpp)[-1] = '\n'; |
| 86 | } |
| 87 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 88 | static int expkey_upcall(struct cache_detail *cd, struct cache_head *h) |
| 89 | { |
| 90 | return sunrpc_cache_pipe_upcall(cd, h, expkey_request); |
| 91 | } |
| 92 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 93 | static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old); |
| 94 | static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *); |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 95 | static struct cache_detail svc_expkey_cache; |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 98 | { |
| 99 | /* client fsidtype fsid [path] */ |
| 100 | char *buf; |
| 101 | int len; |
| 102 | struct auth_domain *dom = NULL; |
| 103 | int err; |
| 104 | int fsidtype; |
| 105 | char *ep; |
| 106 | struct svc_expkey key; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 107 | struct svc_expkey *ek = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | if (mesg[mlen-1] != '\n') |
| 110 | return -EINVAL; |
| 111 | mesg[mlen-1] = 0; |
| 112 | |
| 113 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 114 | err = -ENOMEM; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 115 | if (!buf) |
| 116 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | err = -EINVAL; |
| 119 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 120 | goto out; |
| 121 | |
| 122 | err = -ENOENT; |
| 123 | dom = auth_domain_find(buf); |
| 124 | if (!dom) |
| 125 | goto out; |
| 126 | dprintk("found domain %s\n", buf); |
| 127 | |
| 128 | err = -EINVAL; |
| 129 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 130 | goto out; |
| 131 | fsidtype = simple_strtoul(buf, &ep, 10); |
| 132 | if (*ep) |
| 133 | goto out; |
| 134 | dprintk("found fsidtype %d\n", fsidtype); |
Frank Filz | 4bdff8c | 2006-06-30 01:56:11 -0700 | [diff] [blame] | 135 | if (key_len(fsidtype)==0) /* invalid type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | goto out; |
| 137 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 138 | goto out; |
| 139 | dprintk("found fsid length %d\n", len); |
| 140 | if (len != key_len(fsidtype)) |
| 141 | goto out; |
| 142 | |
| 143 | /* OK, we seem to have a valid key */ |
| 144 | key.h.flags = 0; |
| 145 | key.h.expiry_time = get_expiry(&mesg); |
| 146 | if (key.h.expiry_time == 0) |
| 147 | goto out; |
| 148 | |
| 149 | key.ek_client = dom; |
| 150 | key.ek_fsidtype = fsidtype; |
| 151 | memcpy(key.ek_fsid, buf, len); |
| 152 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 153 | ek = svc_expkey_lookup(&key); |
| 154 | err = -ENOMEM; |
| 155 | if (!ek) |
| 156 | goto out; |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | /* now we want a pathname, or empty meaning NEGATIVE */ |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 159 | err = -EINVAL; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 160 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 161 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | goto out; |
| 163 | dprintk("Path seems to be <%s>\n", buf); |
| 164 | err = 0; |
| 165 | if (len == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 167 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 168 | if (!ek) |
| 169 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | } else { |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 171 | err = kern_path(buf, 0, &key.ek_path); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 172 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | goto out; |
| 174 | |
| 175 | dprintk("Found the path %s\n", buf); |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 176 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 177 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 178 | if (!ek) |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 179 | err = -ENOMEM; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 180 | path_put(&key.ek_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | } |
| 182 | cache_flush(); |
| 183 | out: |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 184 | if (ek) |
| 185 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (dom) |
| 187 | auth_domain_put(dom); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 188 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | return err; |
| 190 | } |
| 191 | |
| 192 | static int expkey_show(struct seq_file *m, |
| 193 | struct cache_detail *cd, |
| 194 | struct cache_head *h) |
| 195 | { |
| 196 | struct svc_expkey *ek ; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 197 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | if (h ==NULL) { |
| 200 | seq_puts(m, "#domain fsidtype fsid [path]\n"); |
| 201 | return 0; |
| 202 | } |
| 203 | ek = container_of(h, struct svc_expkey, h); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 204 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
| 205 | ek->ek_fsidtype); |
| 206 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) |
| 207 | seq_printf(m, "%08x", ek->ek_fsid[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | if (test_bit(CACHE_VALID, &h->flags) && |
| 209 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
| 210 | seq_printf(m, " "); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 211 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | seq_printf(m, "\n"); |
| 214 | return 0; |
| 215 | } |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 216 | |
| 217 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
| 218 | { |
| 219 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
| 220 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); |
| 221 | |
| 222 | if (orig->ek_fsidtype != new->ek_fsidtype || |
| 223 | orig->ek_client != new->ek_client || |
| 224 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) |
| 225 | return 0; |
| 226 | return 1; |
| 227 | } |
| 228 | |
| 229 | static inline void expkey_init(struct cache_head *cnew, |
| 230 | struct cache_head *citem) |
| 231 | { |
| 232 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 233 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 234 | |
| 235 | kref_get(&item->ek_client->ref); |
| 236 | new->ek_client = item->ek_client; |
| 237 | new->ek_fsidtype = item->ek_fsidtype; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 238 | |
| 239 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static inline void expkey_update(struct cache_head *cnew, |
| 243 | struct cache_head *citem) |
| 244 | { |
| 245 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 246 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 247 | |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 248 | new->ek_path = item->ek_path; |
| 249 | path_get(&item->ek_path); |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | static struct cache_head *expkey_alloc(void) |
| 253 | { |
| 254 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 255 | if (i) |
| 256 | return &i->h; |
| 257 | else |
| 258 | return NULL; |
| 259 | } |
| 260 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 261 | static struct cache_detail svc_expkey_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 262 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | .hash_size = EXPKEY_HASHMAX, |
| 264 | .hash_table = expkey_table, |
| 265 | .name = "nfsd.fh", |
| 266 | .cache_put = expkey_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 267 | .cache_upcall = expkey_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | .cache_parse = expkey_parse, |
| 269 | .cache_show = expkey_show, |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 270 | .match = expkey_match, |
| 271 | .init = expkey_init, |
| 272 | .update = expkey_update, |
| 273 | .alloc = expkey_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | }; |
| 275 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 276 | static struct svc_expkey * |
| 277 | svc_expkey_lookup(struct svc_expkey *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 279 | struct cache_head *ch; |
| 280 | int hash = item->ek_fsidtype; |
| 281 | char * cp = (char*)item->ek_fsid; |
| 282 | int len = key_len(item->ek_fsidtype); |
| 283 | |
| 284 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); |
| 285 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); |
| 286 | hash &= EXPKEY_HASHMASK; |
| 287 | |
| 288 | ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h, |
| 289 | hash); |
| 290 | if (ch) |
| 291 | return container_of(ch, struct svc_expkey, h); |
| 292 | else |
| 293 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 296 | static struct svc_expkey * |
| 297 | svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 299 | struct cache_head *ch; |
| 300 | int hash = new->ek_fsidtype; |
| 301 | char * cp = (char*)new->ek_fsid; |
| 302 | int len = key_len(new->ek_fsidtype); |
| 303 | |
| 304 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); |
| 305 | hash ^= hash_ptr(new->ek_client, EXPKEY_HASHBITS); |
| 306 | hash &= EXPKEY_HASHMASK; |
| 307 | |
| 308 | ch = sunrpc_cache_update(&svc_expkey_cache, &new->h, |
| 309 | &old->h, hash); |
| 310 | if (ch) |
| 311 | return container_of(ch, struct svc_expkey, h); |
| 312 | else |
| 313 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | #define EXPORT_HASHBITS 8 |
| 318 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) |
| 319 | #define EXPORT_HASHMASK (EXPORT_HASHMAX -1) |
| 320 | |
| 321 | static struct cache_head *export_table[EXPORT_HASHMAX]; |
| 322 | |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 323 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
| 324 | { |
| 325 | int i; |
| 326 | |
| 327 | for (i = 0; i < fsloc->locations_count; i++) { |
| 328 | kfree(fsloc->locations[i].path); |
| 329 | kfree(fsloc->locations[i].hosts); |
| 330 | } |
| 331 | kfree(fsloc->locations); |
| 332 | } |
| 333 | |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 334 | static void svc_export_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 336 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 337 | path_put(&exp->ex_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 338 | auth_domain_put(exp->ex_client); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 339 | kfree(exp->ex_pathname); |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 340 | nfsd4_fslocs_free(&exp->ex_fslocs); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 341 | kfree(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static void svc_export_request(struct cache_detail *cd, |
| 345 | struct cache_head *h, |
| 346 | char **bpp, int *blen) |
| 347 | { |
| 348 | /* client path */ |
| 349 | struct svc_export *exp = container_of(h, struct svc_export, h); |
| 350 | char *pth; |
| 351 | |
| 352 | qword_add(bpp, blen, exp->ex_client->name); |
Jan Blunck | cf28b48 | 2008-02-14 19:38:44 -0800 | [diff] [blame] | 353 | pth = d_path(&exp->ex_path, *bpp, *blen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | if (IS_ERR(pth)) { |
| 355 | /* is this correct? */ |
| 356 | (*bpp)[0] = '\n'; |
| 357 | return; |
| 358 | } |
| 359 | qword_add(bpp, blen, pth); |
| 360 | (*bpp)[-1] = '\n'; |
| 361 | } |
| 362 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 363 | static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h) |
| 364 | { |
| 365 | return sunrpc_cache_pipe_upcall(cd, h, svc_export_request); |
| 366 | } |
| 367 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 368 | static struct svc_export *svc_export_update(struct svc_export *new, |
| 369 | struct svc_export *old); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 370 | static struct svc_export *svc_export_lookup(struct svc_export *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 372 | static int check_export(struct inode *inode, int flags, unsigned char *uuid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { |
| 374 | |
| 375 | /* We currently export only dirs and regular files. |
| 376 | * This is what umountd does. |
| 377 | */ |
| 378 | if (!S_ISDIR(inode->i_mode) && |
| 379 | !S_ISREG(inode->i_mode)) |
| 380 | return -ENOTDIR; |
| 381 | |
| 382 | /* There are two requirements on a filesystem to be exportable. |
| 383 | * 1: We must be able to identify the filesystem from a number. |
| 384 | * either a device number (so FS_REQUIRES_DEV needed) |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 385 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | * 2: We must be able to find an inode from a filehandle. |
| 387 | * This means that s_export_op must be set. |
| 388 | */ |
| 389 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 390 | !(flags & NFSEXP_FSID) && |
| 391 | uuid == NULL) { |
Greg Banks | 3e3b480 | 2006-10-02 02:17:41 -0700 | [diff] [blame] | 392 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | return -EINVAL; |
| 394 | } |
Christoph Hellwig | cfaea78 | 2007-10-21 16:42:16 -0700 | [diff] [blame] | 395 | |
| 396 | if (!inode->i_sb->s_export_op || |
| 397 | !inode->i_sb->s_export_op->fh_to_dentry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | dprintk("exp_export: export of invalid fs type.\n"); |
| 399 | return -EINVAL; |
| 400 | } |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | return 0; |
| 403 | |
| 404 | } |
| 405 | |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 406 | #ifdef CONFIG_NFSD_V4 |
| 407 | |
| 408 | static int |
| 409 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) |
| 410 | { |
| 411 | int len; |
| 412 | int migrated, i, err; |
| 413 | |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 414 | /* listsize */ |
| 415 | err = get_int(mesg, &fsloc->locations_count); |
| 416 | if (err) |
| 417 | return err; |
| 418 | if (fsloc->locations_count > MAX_FS_LOCATIONS) |
| 419 | return -EINVAL; |
| 420 | if (fsloc->locations_count == 0) |
| 421 | return 0; |
| 422 | |
| 423 | fsloc->locations = kzalloc(fsloc->locations_count |
| 424 | * sizeof(struct nfsd4_fs_location), GFP_KERNEL); |
| 425 | if (!fsloc->locations) |
| 426 | return -ENOMEM; |
| 427 | for (i=0; i < fsloc->locations_count; i++) { |
| 428 | /* colon separated host list */ |
| 429 | err = -EINVAL; |
| 430 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 431 | if (len <= 0) |
| 432 | goto out_free_all; |
| 433 | err = -ENOMEM; |
| 434 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); |
| 435 | if (!fsloc->locations[i].hosts) |
| 436 | goto out_free_all; |
| 437 | err = -EINVAL; |
| 438 | /* slash separated path component list */ |
| 439 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 440 | if (len <= 0) |
| 441 | goto out_free_all; |
| 442 | err = -ENOMEM; |
| 443 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); |
| 444 | if (!fsloc->locations[i].path) |
| 445 | goto out_free_all; |
| 446 | } |
| 447 | /* migrated */ |
| 448 | err = get_int(mesg, &migrated); |
| 449 | if (err) |
| 450 | goto out_free_all; |
| 451 | err = -EINVAL; |
| 452 | if (migrated < 0 || migrated > 1) |
| 453 | goto out_free_all; |
| 454 | fsloc->migrated = migrated; |
| 455 | return 0; |
| 456 | out_free_all: |
| 457 | nfsd4_fslocs_free(fsloc); |
| 458 | return err; |
| 459 | } |
| 460 | |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 461 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
| 462 | { |
| 463 | int listsize, err; |
| 464 | struct exp_flavor_info *f; |
| 465 | |
| 466 | err = get_int(mesg, &listsize); |
| 467 | if (err) |
| 468 | return err; |
| 469 | if (listsize < 0 || listsize > MAX_SECINFO_LIST) |
| 470 | return -EINVAL; |
| 471 | |
| 472 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { |
| 473 | err = get_int(mesg, &f->pseudoflavor); |
| 474 | if (err) |
| 475 | return err; |
| 476 | /* |
Roel Kluin | 80492e7 | 2009-04-21 16:08:39 +0200 | [diff] [blame] | 477 | * XXX: It would be nice to also check whether this |
| 478 | * pseudoflavor is supported, so we can discover the |
| 479 | * problem at export time instead of when a client fails |
| 480 | * to authenticate. |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 481 | */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 482 | err = get_int(mesg, &f->flags); |
| 483 | if (err) |
| 484 | return err; |
| 485 | /* Only some flags are allowed to differ between flavors: */ |
| 486 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | exp->ex_nflavors = listsize; |
| 490 | return 0; |
| 491 | } |
| 492 | |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 493 | #else /* CONFIG_NFSD_V4 */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 494 | static inline int |
| 495 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} |
| 496 | static inline int |
| 497 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 498 | #endif |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 501 | { |
| 502 | /* client path expiry [flags anonuid anongid fsid] */ |
| 503 | char *buf; |
| 504 | int len; |
| 505 | int err; |
| 506 | struct auth_domain *dom = NULL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 507 | struct svc_export exp = {}, *expp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | int an_int; |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | if (mesg[mlen-1] != '\n') |
| 511 | return -EINVAL; |
| 512 | mesg[mlen-1] = 0; |
| 513 | |
| 514 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 515 | if (!buf) |
| 516 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | /* client */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 520 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 521 | if (len <= 0) |
| 522 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | err = -ENOENT; |
| 525 | dom = auth_domain_find(buf); |
| 526 | if (!dom) |
| 527 | goto out; |
| 528 | |
| 529 | /* path */ |
| 530 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 531 | if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 532 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 534 | err = kern_path(buf, 0, &exp.ex_path); |
| 535 | if (err) |
| 536 | goto out1; |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | exp.ex_client = dom; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 539 | |
J.Bruce Fields | b009a87 | 2006-10-04 02:16:17 -0700 | [diff] [blame] | 540 | err = -ENOMEM; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 541 | exp.ex_pathname = kstrdup(buf, GFP_KERNEL); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 542 | if (!exp.ex_pathname) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 543 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | /* expiry */ |
| 546 | err = -EINVAL; |
| 547 | exp.h.expiry_time = get_expiry(&mesg); |
| 548 | if (exp.h.expiry_time == 0) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 549 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | /* flags */ |
| 552 | err = get_int(&mesg, &an_int); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 553 | if (err == -ENOENT) { |
| 554 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 556 | } else { |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 557 | if (err || an_int < 0) |
| 558 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | exp.ex_flags= an_int; |
| 560 | |
| 561 | /* anon uid */ |
| 562 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 563 | if (err) |
| 564 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | exp.ex_anon_uid= an_int; |
| 566 | |
| 567 | /* anon gid */ |
| 568 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 569 | if (err) |
| 570 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | exp.ex_anon_gid= an_int; |
| 572 | |
| 573 | /* fsid */ |
| 574 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 575 | if (err) |
| 576 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | exp.ex_fsid = an_int; |
| 578 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 579 | while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) { |
| 580 | if (strcmp(buf, "fsloc") == 0) |
| 581 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); |
| 582 | else if (strcmp(buf, "uuid") == 0) { |
| 583 | /* expect a 16 byte uuid encoded as \xXXXX... */ |
| 584 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 585 | if (len != 16) |
| 586 | err = -EINVAL; |
| 587 | else { |
| 588 | exp.ex_uuid = |
| 589 | kmemdup(buf, 16, GFP_KERNEL); |
| 590 | if (exp.ex_uuid == NULL) |
| 591 | err = -ENOMEM; |
| 592 | } |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 593 | } else if (strcmp(buf, "secinfo") == 0) |
| 594 | err = secinfo_parse(&mesg, buf, &exp); |
| 595 | else |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 596 | /* quietly ignore unknown words and anything |
| 597 | * following. Newer user-space can try to set |
| 598 | * new values, then see what the result was. |
| 599 | */ |
| 600 | break; |
| 601 | if (err) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 602 | goto out4; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 603 | } |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 604 | |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 605 | err = check_export(exp.ex_path.dentry->d_inode, exp.ex_flags, |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 606 | exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 607 | if (err) |
| 608 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | } |
| 610 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 611 | expp = svc_export_lookup(&exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (expp) |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 613 | expp = svc_export_update(&exp, expp); |
| 614 | else |
| 615 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | cache_flush(); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 617 | if (expp == NULL) |
| 618 | err = -ENOMEM; |
| 619 | else |
| 620 | exp_put(expp); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 621 | out4: |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 622 | nfsd4_fslocs_free(&exp.ex_fslocs); |
| 623 | kfree(exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 624 | out3: |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 625 | kfree(exp.ex_pathname); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 626 | out2: |
| 627 | path_put(&exp.ex_path); |
| 628 | out1: |
| 629 | auth_domain_put(dom); |
| 630 | out: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 631 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return err; |
| 633 | } |
| 634 | |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 635 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 636 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs); |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 637 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
| 639 | static int svc_export_show(struct seq_file *m, |
| 640 | struct cache_detail *cd, |
| 641 | struct cache_head *h) |
| 642 | { |
| 643 | struct svc_export *exp ; |
| 644 | |
| 645 | if (h ==NULL) { |
| 646 | seq_puts(m, "#path domain(flags)\n"); |
| 647 | return 0; |
| 648 | } |
| 649 | exp = container_of(h, struct svc_export, h); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 650 | seq_path(m, &exp->ex_path, " \t\n\\"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | seq_putc(m, '\t'); |
| 652 | seq_escape(m, exp->ex_client->name, " \t\n\\"); |
| 653 | seq_putc(m, '('); |
| 654 | if (test_bit(CACHE_VALID, &h->flags) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 655 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 656 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
| 657 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 658 | if (exp->ex_uuid) { |
| 659 | int i; |
| 660 | seq_puts(m, ",uuid="); |
| 661 | for (i=0; i<16; i++) { |
| 662 | if ((i&3) == 0 && i) |
| 663 | seq_putc(m, ':'); |
| 664 | seq_printf(m, "%02x", exp->ex_uuid[i]); |
| 665 | } |
| 666 | } |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 667 | show_secinfo(m, exp); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 668 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | seq_puts(m, ")\n"); |
| 670 | return 0; |
| 671 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 672 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
| 673 | { |
| 674 | struct svc_export *orig = container_of(a, struct svc_export, h); |
| 675 | struct svc_export *new = container_of(b, struct svc_export, h); |
| 676 | return orig->ex_client == new->ex_client && |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 677 | orig->ex_path.dentry == new->ex_path.dentry && |
| 678 | orig->ex_path.mnt == new->ex_path.mnt; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) |
| 682 | { |
| 683 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 684 | struct svc_export *item = container_of(citem, struct svc_export, h); |
| 685 | |
| 686 | kref_get(&item->ex_client->ref); |
| 687 | new->ex_client = item->ex_client; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 688 | new->ex_path.dentry = dget(item->ex_path.dentry); |
| 689 | new->ex_path.mnt = mntget(item->ex_path.mnt); |
| 690 | new->ex_pathname = NULL; |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 691 | new->ex_fslocs.locations = NULL; |
| 692 | new->ex_fslocs.locations_count = 0; |
| 693 | new->ex_fslocs.migrated = 0; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
| 697 | { |
| 698 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 699 | struct svc_export *item = container_of(citem, struct svc_export, h); |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 700 | int i; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 701 | |
| 702 | new->ex_flags = item->ex_flags; |
| 703 | new->ex_anon_uid = item->ex_anon_uid; |
| 704 | new->ex_anon_gid = item->ex_anon_gid; |
| 705 | new->ex_fsid = item->ex_fsid; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 706 | new->ex_uuid = item->ex_uuid; |
| 707 | item->ex_uuid = NULL; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 708 | new->ex_pathname = item->ex_pathname; |
| 709 | item->ex_pathname = NULL; |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 710 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
| 711 | item->ex_fslocs.locations = NULL; |
| 712 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; |
| 713 | item->ex_fslocs.locations_count = 0; |
| 714 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; |
| 715 | item->ex_fslocs.migrated = 0; |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 716 | new->ex_nflavors = item->ex_nflavors; |
| 717 | for (i = 0; i < MAX_SECINFO_LIST; i++) { |
| 718 | new->ex_flavors[i] = item->ex_flavors[i]; |
| 719 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | static struct cache_head *svc_export_alloc(void) |
| 723 | { |
| 724 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 725 | if (i) |
| 726 | return &i->h; |
| 727 | else |
| 728 | return NULL; |
| 729 | } |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | struct cache_detail svc_export_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 732 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | .hash_size = EXPORT_HASHMAX, |
| 734 | .hash_table = export_table, |
| 735 | .name = "nfsd.export", |
| 736 | .cache_put = svc_export_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 737 | .cache_upcall = svc_export_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | .cache_parse = svc_export_parse, |
| 739 | .cache_show = svc_export_show, |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 740 | .match = svc_export_match, |
| 741 | .init = svc_export_init, |
| 742 | .update = export_update, |
| 743 | .alloc = svc_export_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | }; |
| 745 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 746 | static struct svc_export * |
| 747 | svc_export_lookup(struct svc_export *exp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 749 | struct cache_head *ch; |
| 750 | int hash; |
| 751 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 752 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
| 753 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 754 | |
| 755 | ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h, |
| 756 | hash); |
| 757 | if (ch) |
| 758 | return container_of(ch, struct svc_export, h); |
| 759 | else |
| 760 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 763 | static struct svc_export * |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 764 | svc_export_update(struct svc_export *new, struct svc_export *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 766 | struct cache_head *ch; |
| 767 | int hash; |
| 768 | hash = hash_ptr(old->ex_client, EXPORT_HASHBITS); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 769 | hash ^= hash_ptr(old->ex_path.dentry, EXPORT_HASHBITS); |
| 770 | hash ^= hash_ptr(old->ex_path.mnt, EXPORT_HASHBITS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 772 | ch = sunrpc_cache_update(&svc_export_cache, &new->h, |
| 773 | &old->h, |
| 774 | hash); |
| 775 | if (ch) |
| 776 | return container_of(ch, struct svc_export, h); |
| 777 | else |
| 778 | return NULL; |
| 779 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 782 | static struct svc_expkey * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp) |
| 784 | { |
| 785 | struct svc_expkey key, *ek; |
| 786 | int err; |
| 787 | |
| 788 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 789 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | key.ek_client = clp; |
| 792 | key.ek_fsidtype = fsid_type; |
| 793 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); |
| 794 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 795 | ek = svc_expkey_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 796 | if (ek == NULL) |
| 797 | return ERR_PTR(-ENOMEM); |
| 798 | err = cache_check(&svc_expkey_cache, &ek->h, reqp); |
| 799 | if (err) |
| 800 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | return ek; |
| 802 | } |
| 803 | |
| 804 | static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv, |
| 805 | struct svc_export *exp) |
| 806 | { |
| 807 | struct svc_expkey key, *ek; |
| 808 | |
| 809 | key.ek_client = clp; |
| 810 | key.ek_fsidtype = fsid_type; |
| 811 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 812 | key.ek_path = exp->ex_path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | key.h.expiry_time = NEVER; |
| 814 | key.h.flags = 0; |
| 815 | |
NeilBrown | 8d270f7 | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 816 | ek = svc_expkey_lookup(&key); |
| 817 | if (ek) |
| 818 | ek = svc_expkey_update(&key,ek); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | if (ek) { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 820 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | return 0; |
| 822 | } |
| 823 | return -ENOMEM; |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Find the client's export entry matching xdev/xino. |
| 828 | */ |
| 829 | static inline struct svc_expkey * |
| 830 | exp_get_key(svc_client *clp, dev_t dev, ino_t ino) |
| 831 | { |
| 832 | u32 fsidv[3]; |
| 833 | |
| 834 | if (old_valid_dev(dev)) { |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 835 | mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL); |
| 836 | return exp_find_key(clp, FSID_DEV, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 838 | mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL); |
| 839 | return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | /* |
| 843 | * Find the client's export entry matching fsid |
| 844 | */ |
| 845 | static inline struct svc_expkey * |
| 846 | exp_get_fsid_key(svc_client *clp, int fsid) |
| 847 | { |
| 848 | u32 fsidv[2]; |
| 849 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 850 | mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 852 | return exp_find_key(clp, FSID_NUM, fsidv, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 855 | static svc_export *exp_get_by_name(svc_client *clp, const struct path *path, |
| 856 | struct cache_req *reqp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | { |
| 858 | struct svc_export *exp, key; |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 859 | int err; |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 862 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
| 864 | key.ex_client = clp; |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 865 | key.ex_path = *path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 867 | exp = svc_export_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 868 | if (exp == NULL) |
| 869 | return ERR_PTR(-ENOMEM); |
| 870 | err = cache_check(&svc_export_cache, &exp->h, reqp); |
| 871 | if (err) |
| 872 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | return exp; |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * Find the export entry for a given dentry. |
| 878 | */ |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 879 | static struct svc_export *exp_parent(svc_client *clp, struct path *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | { |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 881 | struct dentry *saved = dget(path->dentry); |
| 882 | svc_export *exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 884 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 885 | struct dentry *parent = dget_parent(path->dentry); |
| 886 | dput(path->dentry); |
| 887 | path->dentry = parent; |
| 888 | exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 890 | dput(path->dentry); |
| 891 | path->dentry = saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | return exp; |
| 893 | } |
| 894 | |
| 895 | /* |
| 896 | * Hashtable locking. Write locks are placed only by user processes |
| 897 | * wanting to modify export information. |
| 898 | * Write locking only done in this file. Read locking |
| 899 | * needed externally. |
| 900 | */ |
| 901 | |
| 902 | static DECLARE_RWSEM(hash_sem); |
| 903 | |
| 904 | void |
| 905 | exp_readlock(void) |
| 906 | { |
| 907 | down_read(&hash_sem); |
| 908 | } |
| 909 | |
| 910 | static inline void |
| 911 | exp_writelock(void) |
| 912 | { |
| 913 | down_write(&hash_sem); |
| 914 | } |
| 915 | |
| 916 | void |
| 917 | exp_readunlock(void) |
| 918 | { |
| 919 | up_read(&hash_sem); |
| 920 | } |
| 921 | |
| 922 | static inline void |
| 923 | exp_writeunlock(void) |
| 924 | { |
| 925 | up_write(&hash_sem); |
| 926 | } |
| 927 | |
| 928 | static void exp_fsid_unhash(struct svc_export *exp) |
| 929 | { |
| 930 | struct svc_expkey *ek; |
| 931 | |
| 932 | if ((exp->ex_flags & NFSEXP_FSID) == 0) |
| 933 | return; |
| 934 | |
| 935 | ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 936 | if (!IS_ERR(ek)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | ek->h.expiry_time = get_seconds()-1; |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 938 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } |
| 940 | svc_expkey_cache.nextcheck = get_seconds(); |
| 941 | } |
| 942 | |
| 943 | static int exp_fsid_hash(svc_client *clp, struct svc_export *exp) |
| 944 | { |
| 945 | u32 fsid[2]; |
| 946 | |
| 947 | if ((exp->ex_flags & NFSEXP_FSID) == 0) |
| 948 | return 0; |
| 949 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 950 | mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL); |
| 951 | return exp_set_key(clp, FSID_NUM, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | static int exp_hash(struct auth_domain *clp, struct svc_export *exp) |
| 955 | { |
| 956 | u32 fsid[2]; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 957 | struct inode *inode = exp->ex_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | dev_t dev = inode->i_sb->s_dev; |
| 959 | |
| 960 | if (old_valid_dev(dev)) { |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 961 | mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL); |
| 962 | return exp_set_key(clp, FSID_DEV, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 964 | mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL); |
| 965 | return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | static void exp_unhash(struct svc_export *exp) |
| 969 | { |
| 970 | struct svc_expkey *ek; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 971 | struct inode *inode = exp->ex_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 974 | if (!IS_ERR(ek)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | ek->h.expiry_time = get_seconds()-1; |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 976 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | svc_expkey_cache.nextcheck = get_seconds(); |
| 979 | } |
| 980 | |
| 981 | /* |
| 982 | * Export a file system. |
| 983 | */ |
| 984 | int |
| 985 | exp_export(struct nfsctl_export *nxp) |
| 986 | { |
| 987 | svc_client *clp; |
| 988 | struct svc_export *exp = NULL; |
| 989 | struct svc_export new; |
| 990 | struct svc_expkey *fsid_key = NULL; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 991 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | int err; |
| 993 | |
| 994 | /* Consistency check */ |
| 995 | err = -EINVAL; |
| 996 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || |
| 997 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) |
| 998 | goto out; |
| 999 | |
| 1000 | dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n", |
| 1001 | nxp->ex_client, nxp->ex_path, |
| 1002 | (unsigned)nxp->ex_dev, (long)nxp->ex_ino, |
| 1003 | nxp->ex_flags); |
| 1004 | |
| 1005 | /* Try to lock the export table for update */ |
| 1006 | exp_writelock(); |
| 1007 | |
| 1008 | /* Look up client info */ |
| 1009 | if (!(clp = auth_domain_find(nxp->ex_client))) |
| 1010 | goto out_unlock; |
| 1011 | |
| 1012 | |
| 1013 | /* Look up the dentry */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1014 | err = kern_path(nxp->ex_path, 0, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | if (err) |
Julia Lawall | 53e6d8d | 2008-07-25 22:08:09 +0200 | [diff] [blame] | 1016 | goto out_put_clp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | err = -EINVAL; |
| 1018 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1019 | exp = exp_get_by_name(clp, &path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1021 | memset(&new, 0, sizeof(new)); |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | /* must make sure there won't be an ex_fsid clash */ |
| 1024 | if ((nxp->ex_flags & NFSEXP_FSID) && |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1025 | (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) && |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 1026 | fsid_key->ek_path.mnt && |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1027 | (fsid_key->ek_path.mnt != path.mnt || |
| 1028 | fsid_key->ek_path.dentry != path.dentry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | goto finish; |
| 1030 | |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1031 | if (!IS_ERR(exp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | /* just a flags/id/fsid update */ |
| 1033 | |
| 1034 | exp_fsid_unhash(exp); |
| 1035 | exp->ex_flags = nxp->ex_flags; |
| 1036 | exp->ex_anon_uid = nxp->ex_anon_uid; |
| 1037 | exp->ex_anon_gid = nxp->ex_anon_gid; |
| 1038 | exp->ex_fsid = nxp->ex_dev; |
| 1039 | |
| 1040 | err = exp_fsid_hash(clp, exp); |
| 1041 | goto finish; |
| 1042 | } |
| 1043 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1044 | err = check_export(path.dentry->d_inode, nxp->ex_flags, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | if (err) goto finish; |
| 1046 | |
| 1047 | err = -ENOMEM; |
| 1048 | |
| 1049 | dprintk("nfsd: creating export entry %p for client %p\n", exp, clp); |
| 1050 | |
| 1051 | new.h.expiry_time = NEVER; |
| 1052 | new.h.flags = 0; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1053 | new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL); |
| 1054 | if (!new.ex_pathname) |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1055 | goto finish; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | new.ex_client = clp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1057 | new.ex_path = path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | new.ex_flags = nxp->ex_flags; |
| 1059 | new.ex_anon_uid = nxp->ex_anon_uid; |
| 1060 | new.ex_anon_gid = nxp->ex_anon_gid; |
| 1061 | new.ex_fsid = nxp->ex_dev; |
| 1062 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 1063 | exp = svc_export_lookup(&new); |
| 1064 | if (exp) |
| 1065 | exp = svc_export_update(&new, exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 1067 | if (!exp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | goto finish; |
| 1069 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | if (exp_hash(clp, exp) || |
| 1071 | exp_fsid_hash(clp, exp)) { |
| 1072 | /* failed to create at least one index */ |
| 1073 | exp_do_unexport(exp); |
| 1074 | cache_flush(); |
NeilBrown | f988443 | 2006-12-13 00:35:45 -0800 | [diff] [blame] | 1075 | } else |
| 1076 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | finish: |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1078 | kfree(new.ex_pathname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | if (exp) |
| 1080 | exp_put(exp); |
| 1081 | if (fsid_key && !IS_ERR(fsid_key)) |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1082 | cache_put(&fsid_key->h, &svc_expkey_cache); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1083 | path_put(&path); |
Julia Lawall | 53e6d8d | 2008-07-25 22:08:09 +0200 | [diff] [blame] | 1084 | out_put_clp: |
| 1085 | auth_domain_put(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | out_unlock: |
| 1087 | exp_writeunlock(); |
| 1088 | out: |
| 1089 | return err; |
| 1090 | } |
| 1091 | |
| 1092 | /* |
| 1093 | * Unexport a file system. The export entry has already |
| 1094 | * been removed from the client's list of exported fs's. |
| 1095 | */ |
| 1096 | static void |
| 1097 | exp_do_unexport(svc_export *unexp) |
| 1098 | { |
| 1099 | unexp->h.expiry_time = get_seconds()-1; |
| 1100 | svc_export_cache.nextcheck = get_seconds(); |
| 1101 | exp_unhash(unexp); |
| 1102 | exp_fsid_unhash(unexp); |
| 1103 | } |
| 1104 | |
| 1105 | |
| 1106 | /* |
| 1107 | * unexport syscall. |
| 1108 | */ |
| 1109 | int |
| 1110 | exp_unexport(struct nfsctl_export *nxp) |
| 1111 | { |
| 1112 | struct auth_domain *dom; |
| 1113 | svc_export *exp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1114 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | int err; |
| 1116 | |
| 1117 | /* Consistency check */ |
| 1118 | if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) || |
| 1119 | !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX)) |
| 1120 | return -EINVAL; |
| 1121 | |
| 1122 | exp_writelock(); |
| 1123 | |
| 1124 | err = -EINVAL; |
| 1125 | dom = auth_domain_find(nxp->ex_client); |
| 1126 | if (!dom) { |
| 1127 | dprintk("nfsd: unexport couldn't find %s\n", nxp->ex_client); |
| 1128 | goto out_unlock; |
| 1129 | } |
| 1130 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1131 | err = kern_path(nxp->ex_path, 0, &path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | if (err) |
| 1133 | goto out_domain; |
| 1134 | |
| 1135 | err = -EINVAL; |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1136 | exp = exp_get_by_name(dom, &path, NULL); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1137 | path_put(&path); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1138 | if (IS_ERR(exp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | goto out_domain; |
| 1140 | |
| 1141 | exp_do_unexport(exp); |
| 1142 | exp_put(exp); |
| 1143 | err = 0; |
| 1144 | |
| 1145 | out_domain: |
| 1146 | auth_domain_put(dom); |
| 1147 | cache_flush(); |
| 1148 | out_unlock: |
| 1149 | exp_writeunlock(); |
| 1150 | return err; |
| 1151 | } |
| 1152 | |
| 1153 | /* |
| 1154 | * Obtain the root fh on behalf of a client. |
| 1155 | * This could be done in user space, but I feel that it adds some safety |
| 1156 | * since its harder to fool a kernel module than a user space program. |
| 1157 | */ |
| 1158 | int |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1159 | exp_rootfh(svc_client *clp, char *name, struct knfsd_fh *f, int maxsize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | { |
| 1161 | struct svc_export *exp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1162 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | struct inode *inode; |
| 1164 | struct svc_fh fh; |
| 1165 | int err; |
| 1166 | |
| 1167 | err = -EPERM; |
| 1168 | /* NB: we probably ought to check that it's NUL-terminated */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1169 | if (kern_path(name, 0, &path)) { |
| 1170 | printk("nfsd: exp_rootfh path not found %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | return err; |
| 1172 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1173 | inode = path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
| 1175 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1176 | name, path.dentry, clp->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | inode->i_sb->s_id, inode->i_ino); |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 1178 | exp = exp_parent(clp, &path); |
J.Bruce Fields | 4b41bd8 | 2006-12-13 00:35:21 -0800 | [diff] [blame] | 1179 | if (IS_ERR(exp)) { |
| 1180 | err = PTR_ERR(exp); |
| 1181 | goto out; |
| 1182 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | |
| 1184 | /* |
| 1185 | * fh must be initialized before calling fh_compose |
| 1186 | */ |
| 1187 | fh_init(&fh, maxsize); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1188 | if (fh_compose(&fh, exp, path.dentry, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | err = -EINVAL; |
| 1190 | else |
| 1191 | err = 0; |
| 1192 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); |
| 1193 | fh_put(&fh); |
| 1194 | exp_put(exp); |
| 1195 | out: |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 1196 | path_put(&path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | return err; |
| 1198 | } |
| 1199 | |
Adrian Bunk | cce76f9 | 2007-10-16 01:27:52 -0700 | [diff] [blame] | 1200 | static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, |
| 1201 | u32 *fsidv, struct cache_req *reqp) |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1202 | { |
| 1203 | struct svc_export *exp; |
| 1204 | struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1205 | if (IS_ERR(ek)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 1206 | return ERR_CAST(ek); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1207 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 1208 | exp = exp_get_by_name(clp, &ek->ek_path, reqp); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1209 | cache_put(&ek->h, &svc_expkey_cache); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1210 | |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1211 | if (IS_ERR(exp)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 1212 | return ERR_CAST(exp); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1213 | return exp; |
| 1214 | } |
| 1215 | |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 1216 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
| 1217 | { |
| 1218 | struct exp_flavor_info *f; |
| 1219 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
| 1220 | |
| 1221 | /* legacy gss-only clients are always OK: */ |
| 1222 | if (exp->ex_client == rqstp->rq_gssclient) |
| 1223 | return 0; |
| 1224 | /* ip-address based client; check sec= export option: */ |
| 1225 | for (f = exp->ex_flavors; f < end; f++) { |
| 1226 | if (f->pseudoflavor == rqstp->rq_flavor) |
| 1227 | return 0; |
| 1228 | } |
| 1229 | /* defaults in absence of sec= options: */ |
| 1230 | if (exp->ex_nflavors == 0) { |
| 1231 | if (rqstp->rq_flavor == RPC_AUTH_NULL || |
| 1232 | rqstp->rq_flavor == RPC_AUTH_UNIX) |
| 1233 | return 0; |
| 1234 | } |
| 1235 | return nfserr_wrongsec; |
| 1236 | } |
| 1237 | |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1238 | /* |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1239 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
| 1240 | * auth_unix client) if it's available and has secinfo information; |
| 1241 | * otherwise, will try to use rq_gssclient. |
| 1242 | * |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1243 | * Called from functions that handle requests; functions that do work on |
| 1244 | * behalf of mountd are passed a single client name to use, and should |
| 1245 | * use exp_get_by_name() or exp_find(). |
| 1246 | */ |
| 1247 | struct svc_export * |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1248 | rqst_exp_get_by_name(struct svc_rqst *rqstp, struct path *path) |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1249 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1250 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1251 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1252 | if (rqstp->rq_client == NULL) |
| 1253 | goto gss; |
| 1254 | |
| 1255 | /* First try the auth_unix client: */ |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1256 | exp = exp_get_by_name(rqstp->rq_client, path, &rqstp->rq_chandle); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1257 | if (PTR_ERR(exp) == -ENOENT) |
| 1258 | goto gss; |
| 1259 | if (IS_ERR(exp)) |
| 1260 | return exp; |
| 1261 | /* If it has secinfo, assume there are no gss/... clients */ |
| 1262 | if (exp->ex_nflavors > 0) |
| 1263 | return exp; |
| 1264 | gss: |
| 1265 | /* Otherwise, try falling back on gss client */ |
| 1266 | if (rqstp->rq_gssclient == NULL) |
| 1267 | return exp; |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 1268 | gssexp = exp_get_by_name(rqstp->rq_gssclient, path, &rqstp->rq_chandle); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1269 | if (PTR_ERR(gssexp) == -ENOENT) |
| 1270 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1271 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1272 | exp_put(exp); |
| 1273 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1274 | } |
| 1275 | |
| 1276 | struct svc_export * |
| 1277 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) |
| 1278 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1279 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1280 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1281 | if (rqstp->rq_client == NULL) |
| 1282 | goto gss; |
| 1283 | |
| 1284 | /* First try the auth_unix client: */ |
| 1285 | exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); |
| 1286 | if (PTR_ERR(exp) == -ENOENT) |
| 1287 | goto gss; |
| 1288 | if (IS_ERR(exp)) |
| 1289 | return exp; |
| 1290 | /* If it has secinfo, assume there are no gss/... clients */ |
| 1291 | if (exp->ex_nflavors > 0) |
| 1292 | return exp; |
| 1293 | gss: |
| 1294 | /* Otherwise, try falling back on gss client */ |
| 1295 | if (rqstp->rq_gssclient == NULL) |
| 1296 | return exp; |
| 1297 | gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, |
| 1298 | &rqstp->rq_chandle); |
| 1299 | if (PTR_ERR(gssexp) == -ENOENT) |
| 1300 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 1301 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1302 | exp_put(exp); |
| 1303 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | struct svc_export * |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1307 | rqst_exp_parent(struct svc_rqst *rqstp, struct path *path) |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1308 | { |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1309 | struct dentry *saved = dget(path->dentry); |
| 1310 | struct svc_export *exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1311 | |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1312 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 1313 | struct dentry *parent = dget_parent(path->dentry); |
| 1314 | dput(path->dentry); |
| 1315 | path->dentry = parent; |
| 1316 | exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1317 | } |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 1318 | dput(path->dentry); |
| 1319 | path->dentry = saved; |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 1320 | return exp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1321 | } |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | /* |
| 1324 | * Called when we need the filehandle for the root of the pseudofs, |
| 1325 | * for a given NFSv4 client. The root is defined to be the |
| 1326 | * export point with fsid==0 |
| 1327 | */ |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1328 | __be32 |
J. Bruce Fields | df547ef | 2007-07-17 04:04:43 -0700 | [diff] [blame] | 1329 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | { |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1331 | struct svc_export *exp; |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1332 | __be32 rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | u32 fsidv[2]; |
| 1334 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 1335 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 1337 | exp = rqst_exp_find(rqstp, FSID_NUM, fsidv); |
J.Bruce Fields | 6899320 | 2006-12-13 00:35:23 -0800 | [diff] [blame] | 1338 | if (IS_ERR(exp)) |
| 1339 | return nfserrno(PTR_ERR(exp)); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1340 | rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL); |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 1341 | if (rv) |
| 1342 | goto out; |
| 1343 | rv = check_nfsd_access(exp, rqstp); |
| 1344 | out: |
J.Bruce Fields | d0ebd9c | 2006-10-04 02:16:10 -0700 | [diff] [blame] | 1345 | exp_put(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | return rv; |
| 1347 | } |
| 1348 | |
| 1349 | /* Iterator */ |
| 1350 | |
| 1351 | static void *e_start(struct seq_file *m, loff_t *pos) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1352 | __acquires(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | { |
| 1354 | loff_t n = *pos; |
| 1355 | unsigned hash, export; |
| 1356 | struct cache_head *ch; |
| 1357 | |
| 1358 | exp_readlock(); |
| 1359 | read_lock(&svc_export_cache.hash_lock); |
| 1360 | if (!n--) |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1361 | return SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | hash = n >> 32; |
| 1363 | export = n & ((1LL<<32) - 1); |
| 1364 | |
| 1365 | |
| 1366 | for (ch=export_table[hash]; ch; ch=ch->next) |
| 1367 | if (!export--) |
| 1368 | return ch; |
| 1369 | n &= ~((1LL<<32) - 1); |
| 1370 | do { |
| 1371 | hash++; |
| 1372 | n += 1LL<<32; |
| 1373 | } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL); |
| 1374 | if (hash >= EXPORT_HASHMAX) |
| 1375 | return NULL; |
| 1376 | *pos = n+1; |
| 1377 | return export_table[hash]; |
| 1378 | } |
| 1379 | |
| 1380 | static void *e_next(struct seq_file *m, void *p, loff_t *pos) |
| 1381 | { |
| 1382 | struct cache_head *ch = p; |
| 1383 | int hash = (*pos >> 32); |
| 1384 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1385 | if (p == SEQ_START_TOKEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | hash = 0; |
| 1387 | else if (ch->next == NULL) { |
| 1388 | hash++; |
| 1389 | *pos += 1LL<<32; |
| 1390 | } else { |
| 1391 | ++*pos; |
| 1392 | return ch->next; |
| 1393 | } |
| 1394 | *pos &= ~((1LL<<32) - 1); |
| 1395 | while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) { |
| 1396 | hash++; |
| 1397 | *pos += 1LL<<32; |
| 1398 | } |
| 1399 | if (hash >= EXPORT_HASHMAX) |
| 1400 | return NULL; |
| 1401 | ++*pos; |
| 1402 | return export_table[hash]; |
| 1403 | } |
| 1404 | |
| 1405 | static void e_stop(struct seq_file *m, void *p) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1406 | __releases(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | { |
| 1408 | read_unlock(&svc_export_cache.hash_lock); |
| 1409 | exp_readunlock(); |
| 1410 | } |
| 1411 | |
| 1412 | static struct flags { |
| 1413 | int flag; |
| 1414 | char *name[2]; |
| 1415 | } expflags[] = { |
| 1416 | { NFSEXP_READONLY, {"ro", "rw"}}, |
| 1417 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, |
| 1418 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, |
| 1419 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, |
| 1420 | { NFSEXP_ASYNC, {"async", "sync"}}, |
| 1421 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, |
| 1422 | { NFSEXP_NOHIDE, {"nohide", ""}}, |
| 1423 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, |
| 1424 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, |
| 1425 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, |
| 1426 | #ifdef MSNFS |
| 1427 | { NFSEXP_MSNFS, {"msnfs", ""}}, |
| 1428 | #endif |
| 1429 | { 0, {"", ""}} |
| 1430 | }; |
| 1431 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1432 | static void show_expflags(struct seq_file *m, int flags, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | struct flags *flg; |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1435 | int state, first = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
| 1437 | for (flg = expflags; flg->flag; flg++) { |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1438 | if (flg->flag & ~mask) |
| 1439 | continue; |
| 1440 | state = (flg->flag & flags) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | if (*flg->name[state]) |
| 1442 | seq_printf(m, "%s%s", first++?",":"", flg->name[state]); |
| 1443 | } |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1446 | static void show_secinfo_flags(struct seq_file *m, int flags) |
| 1447 | { |
| 1448 | seq_printf(m, ","); |
| 1449 | show_expflags(m, flags, NFSEXP_SECINFO_FLAGS); |
| 1450 | } |
| 1451 | |
| 1452 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) |
| 1453 | { |
| 1454 | struct exp_flavor_info *f; |
| 1455 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
| 1456 | int lastflags = 0, first = 0; |
| 1457 | |
| 1458 | if (exp->ex_nflavors == 0) |
| 1459 | return; |
| 1460 | for (f = exp->ex_flavors; f < end; f++) { |
| 1461 | if (first || f->flags != lastflags) { |
| 1462 | if (!first) |
| 1463 | show_secinfo_flags(m, lastflags); |
| 1464 | seq_printf(m, ",sec=%d", f->pseudoflavor); |
| 1465 | lastflags = f->flags; |
| 1466 | } else { |
| 1467 | seq_printf(m, ":%d", f->pseudoflavor); |
| 1468 | } |
| 1469 | } |
| 1470 | show_secinfo_flags(m, lastflags); |
| 1471 | } |
| 1472 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1473 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 1474 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc) |
| 1475 | { |
| 1476 | show_expflags(m, flag, NFSEXP_ALLFLAGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | if (flag & NFSEXP_FSID) |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1478 | seq_printf(m, ",fsid=%d", fsid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | if (anonu != (uid_t)-2 && anonu != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1480 | seq_printf(m, ",anonuid=%u", anonu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | if (anong != (gid_t)-2 && anong != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1482 | seq_printf(m, ",anongid=%u", anong); |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1483 | if (fsloc && fsloc->locations_count > 0) { |
| 1484 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; |
| 1485 | int i; |
| 1486 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1487 | seq_printf(m, ",%s=", loctype); |
Manoj Naik | 9334691 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1488 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
| 1489 | seq_putc(m, '@'); |
| 1490 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); |
| 1491 | for (i = 1; i < fsloc->locations_count; i++) { |
| 1492 | seq_putc(m, ';'); |
| 1493 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); |
| 1494 | seq_putc(m, '@'); |
| 1495 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); |
| 1496 | } |
| 1497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | } |
| 1499 | |
| 1500 | static int e_show(struct seq_file *m, void *p) |
| 1501 | { |
| 1502 | struct cache_head *cp = p; |
| 1503 | struct svc_export *exp = container_of(cp, struct svc_export, h); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1505 | if (p == SEQ_START_TOKEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | seq_puts(m, "# Version 1.1\n"); |
| 1507 | seq_puts(m, "# Path Client(Flags) # IPs\n"); |
| 1508 | return 0; |
| 1509 | } |
| 1510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | cache_get(&exp->h); |
| 1512 | if (cache_check(&svc_export_cache, &exp->h, NULL)) |
| 1513 | return 0; |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1514 | cache_put(&exp->h, &svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | return svc_export_show(m, &svc_export_cache, cp); |
| 1516 | } |
| 1517 | |
| 1518 | struct seq_operations nfs_exports_op = { |
| 1519 | .start = e_start, |
| 1520 | .next = e_next, |
| 1521 | .stop = e_stop, |
| 1522 | .show = e_show, |
| 1523 | }; |
| 1524 | |
| 1525 | /* |
| 1526 | * Add or modify a client. |
| 1527 | * Change requests may involve the list of host addresses. The list of |
| 1528 | * exports and possibly existing uid maps are left untouched. |
| 1529 | */ |
| 1530 | int |
| 1531 | exp_addclient(struct nfsctl_client *ncp) |
| 1532 | { |
| 1533 | struct auth_domain *dom; |
| 1534 | int i, err; |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 1535 | struct in6_addr addr6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
| 1537 | /* First, consistency check. */ |
| 1538 | err = -EINVAL; |
| 1539 | if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) |
| 1540 | goto out; |
| 1541 | if (ncp->cl_naddr > NFSCLNT_ADDRMAX) |
| 1542 | goto out; |
| 1543 | |
| 1544 | /* Lock the hashtable */ |
| 1545 | exp_writelock(); |
| 1546 | |
| 1547 | dom = unix_domain_find(ncp->cl_ident); |
| 1548 | |
| 1549 | err = -ENOMEM; |
| 1550 | if (!dom) |
| 1551 | goto out_unlock; |
| 1552 | |
| 1553 | /* Insert client into hashtable. */ |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 1554 | for (i = 0; i < ncp->cl_naddr; i++) { |
| 1555 | ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6); |
| 1556 | auth_unix_add_addr(&addr6, dom); |
| 1557 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | auth_unix_forget_old(dom); |
| 1559 | auth_domain_put(dom); |
| 1560 | |
| 1561 | err = 0; |
| 1562 | |
| 1563 | out_unlock: |
| 1564 | exp_writeunlock(); |
| 1565 | out: |
| 1566 | return err; |
| 1567 | } |
| 1568 | |
| 1569 | /* |
| 1570 | * Delete a client given an identifier. |
| 1571 | */ |
| 1572 | int |
| 1573 | exp_delclient(struct nfsctl_client *ncp) |
| 1574 | { |
| 1575 | int err; |
| 1576 | struct auth_domain *dom; |
| 1577 | |
| 1578 | err = -EINVAL; |
| 1579 | if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX)) |
| 1580 | goto out; |
| 1581 | |
| 1582 | /* Lock the hashtable */ |
| 1583 | exp_writelock(); |
| 1584 | |
| 1585 | dom = auth_domain_find(ncp->cl_ident); |
| 1586 | /* just make sure that no addresses work |
| 1587 | * and that it will expire soon |
| 1588 | */ |
| 1589 | if (dom) { |
| 1590 | err = auth_unix_forget_old(dom); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | auth_domain_put(dom); |
| 1592 | } |
| 1593 | |
| 1594 | exp_writeunlock(); |
| 1595 | out: |
| 1596 | return err; |
| 1597 | } |
| 1598 | |
| 1599 | /* |
| 1600 | * Verify that string is non-empty and does not exceed max length. |
| 1601 | */ |
| 1602 | static int |
| 1603 | exp_verify_string(char *cp, int max) |
| 1604 | { |
| 1605 | int i; |
| 1606 | |
| 1607 | for (i = 0; i < max; i++) |
| 1608 | if (!cp[i]) |
| 1609 | return i; |
| 1610 | cp[i] = 0; |
| 1611 | printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp); |
| 1612 | return 0; |
| 1613 | } |
| 1614 | |
| 1615 | /* |
| 1616 | * Initialize the exports module. |
| 1617 | */ |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1618 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | nfsd_export_init(void) |
| 1620 | { |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1621 | int rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | dprintk("nfsd: initializing export module.\n"); |
| 1623 | |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1624 | rv = cache_register(&svc_export_cache); |
| 1625 | if (rv) |
| 1626 | return rv; |
| 1627 | rv = cache_register(&svc_expkey_cache); |
| 1628 | if (rv) |
| 1629 | cache_unregister(&svc_export_cache); |
| 1630 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | |
| 1632 | } |
| 1633 | |
| 1634 | /* |
| 1635 | * Flush exports table - called when last nfsd thread is killed |
| 1636 | */ |
| 1637 | void |
| 1638 | nfsd_export_flush(void) |
| 1639 | { |
| 1640 | exp_writelock(); |
| 1641 | cache_purge(&svc_expkey_cache); |
| 1642 | cache_purge(&svc_export_cache); |
| 1643 | exp_writeunlock(); |
| 1644 | } |
| 1645 | |
| 1646 | /* |
| 1647 | * Shutdown the exports module. |
| 1648 | */ |
| 1649 | void |
| 1650 | nfsd_export_shutdown(void) |
| 1651 | { |
| 1652 | |
| 1653 | dprintk("nfsd: shutting down export module.\n"); |
| 1654 | |
| 1655 | exp_writelock(); |
| 1656 | |
J. Bruce Fields | df95a9d | 2007-11-08 16:09:59 -0500 | [diff] [blame] | 1657 | cache_unregister(&svc_expkey_cache); |
| 1658 | cache_unregister(&svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | svcauth_unix_purge(); |
| 1660 | |
| 1661 | exp_writeunlock(); |
| 1662 | dprintk("nfsd: export shutdown complete.\n"); |
| 1663 | } |