Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * NFS exporting and validation. |
| 3 | * |
| 4 | * We maintain a list of clients, each of which has a list of |
| 5 | * exports. To export an fs to a given client, you first have |
| 6 | * to create the client entry with NFSCTL_ADDCLIENT, which |
| 7 | * creates a client control block and adds it to the hash |
| 8 | * table. Then, you call NFSCTL_EXPORT for each fs. |
| 9 | * |
| 10 | * |
| 11 | * Copyright (C) 1995, 1996 Olaf Kirch, <okir@monad.swb.de> |
| 12 | */ |
| 13 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/namei.h> |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 17 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Aurélien Charbon | f15364b | 2008-01-18 15:50:56 +0100 | [diff] [blame] | 19 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 21 | #include "nfsd.h" |
J. Bruce Fields | 1557aca | 2009-12-04 19:36:06 -0500 | [diff] [blame] | 22 | #include "nfsfh.h" |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #define NFSDDBG_FACILITY NFSDDBG_EXPORT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | typedef struct auth_domain svc_client; |
| 27 | typedef struct svc_export svc_export; |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /* |
| 30 | * We have two caches. |
| 31 | * One maps client+vfsmnt+dentry to export options - the export map |
| 32 | * The other maps client+filehandle-fragment to export options. - the expkey map |
| 33 | * |
| 34 | * The export options are actually stored in the first map, and the |
| 35 | * second map contains a reference to the entry in the first map. |
| 36 | */ |
| 37 | |
| 38 | #define EXPKEY_HASHBITS 8 |
| 39 | #define EXPKEY_HASHMAX (1 << EXPKEY_HASHBITS) |
| 40 | #define EXPKEY_HASHMASK (EXPKEY_HASHMAX -1) |
| 41 | static struct cache_head *expkey_table[EXPKEY_HASHMAX]; |
| 42 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 43 | static void expkey_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 45 | struct svc_expkey *key = container_of(ref, struct svc_expkey, h.ref); |
| 46 | |
| 47 | if (test_bit(CACHE_VALID, &key->h.flags) && |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 48 | !test_bit(CACHE_NEGATIVE, &key->h.flags)) |
| 49 | path_put(&key->ek_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 50 | auth_domain_put(key->ek_client); |
| 51 | kfree(key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | static void expkey_request(struct cache_detail *cd, |
| 55 | struct cache_head *h, |
| 56 | char **bpp, int *blen) |
| 57 | { |
| 58 | /* client fsidtype \xfsid */ |
| 59 | struct svc_expkey *ek = container_of(h, struct svc_expkey, h); |
| 60 | char type[5]; |
| 61 | |
| 62 | qword_add(bpp, blen, ek->ek_client->name); |
| 63 | snprintf(type, 5, "%d", ek->ek_fsidtype); |
| 64 | qword_add(bpp, blen, type); |
| 65 | qword_addhex(bpp, blen, (char*)ek->ek_fsid, key_len(ek->ek_fsidtype)); |
| 66 | (*bpp)[-1] = '\n'; |
| 67 | } |
| 68 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 69 | static int expkey_upcall(struct cache_detail *cd, struct cache_head *h) |
| 70 | { |
| 71 | return sunrpc_cache_pipe_upcall(cd, h, expkey_request); |
| 72 | } |
| 73 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 74 | static struct svc_expkey *svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old); |
| 75 | static struct svc_expkey *svc_expkey_lookup(struct svc_expkey *); |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 76 | static struct cache_detail svc_expkey_cache; |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static int expkey_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 79 | { |
| 80 | /* client fsidtype fsid [path] */ |
| 81 | char *buf; |
| 82 | int len; |
| 83 | struct auth_domain *dom = NULL; |
| 84 | int err; |
| 85 | int fsidtype; |
| 86 | char *ep; |
| 87 | struct svc_expkey key; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 88 | struct svc_expkey *ek = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | if (mesg[mlen-1] != '\n') |
| 91 | return -EINVAL; |
| 92 | mesg[mlen-1] = 0; |
| 93 | |
| 94 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 95 | err = -ENOMEM; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 96 | if (!buf) |
| 97 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | err = -EINVAL; |
| 100 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 101 | goto out; |
| 102 | |
| 103 | err = -ENOENT; |
| 104 | dom = auth_domain_find(buf); |
| 105 | if (!dom) |
| 106 | goto out; |
| 107 | dprintk("found domain %s\n", buf); |
| 108 | |
| 109 | err = -EINVAL; |
| 110 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 111 | goto out; |
| 112 | fsidtype = simple_strtoul(buf, &ep, 10); |
| 113 | if (*ep) |
| 114 | goto out; |
| 115 | dprintk("found fsidtype %d\n", fsidtype); |
Frank Filz | 4bdff8c | 2006-06-30 01:56:11 -0700 | [diff] [blame] | 116 | if (key_len(fsidtype)==0) /* invalid type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | goto out; |
| 118 | if ((len=qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 119 | goto out; |
| 120 | dprintk("found fsid length %d\n", len); |
| 121 | if (len != key_len(fsidtype)) |
| 122 | goto out; |
| 123 | |
| 124 | /* OK, we seem to have a valid key */ |
| 125 | key.h.flags = 0; |
| 126 | key.h.expiry_time = get_expiry(&mesg); |
| 127 | if (key.h.expiry_time == 0) |
| 128 | goto out; |
| 129 | |
| 130 | key.ek_client = dom; |
| 131 | key.ek_fsidtype = fsidtype; |
| 132 | memcpy(key.ek_fsid, buf, len); |
| 133 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 134 | ek = svc_expkey_lookup(&key); |
| 135 | err = -ENOMEM; |
| 136 | if (!ek) |
| 137 | goto out; |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | /* now we want a pathname, or empty meaning NEGATIVE */ |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 140 | err = -EINVAL; |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 141 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 142 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | goto out; |
| 144 | dprintk("Path seems to be <%s>\n", buf); |
| 145 | err = 0; |
| 146 | if (len == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | set_bit(CACHE_NEGATIVE, &key.h.flags); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 148 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 149 | if (!ek) |
| 150 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } else { |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 152 | err = kern_path(buf, 0, &key.ek_path); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 153 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | goto out; |
| 155 | |
| 156 | dprintk("Found the path %s\n", buf); |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 157 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 158 | ek = svc_expkey_update(&key, ek); |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 159 | if (!ek) |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 160 | err = -ENOMEM; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 161 | path_put(&key.ek_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
| 163 | cache_flush(); |
| 164 | out: |
J. Bruce Fields | 30bc4df | 2008-10-20 16:34:21 -0400 | [diff] [blame] | 165 | if (ek) |
| 166 | cache_put(&ek->h, &svc_expkey_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (dom) |
| 168 | auth_domain_put(dom); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 169 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | return err; |
| 171 | } |
| 172 | |
| 173 | static int expkey_show(struct seq_file *m, |
| 174 | struct cache_detail *cd, |
| 175 | struct cache_head *h) |
| 176 | { |
| 177 | struct svc_expkey *ek ; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 178 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | if (h ==NULL) { |
| 181 | seq_puts(m, "#domain fsidtype fsid [path]\n"); |
| 182 | return 0; |
| 183 | } |
| 184 | ek = container_of(h, struct svc_expkey, h); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 185 | seq_printf(m, "%s %d 0x", ek->ek_client->name, |
| 186 | ek->ek_fsidtype); |
| 187 | for (i=0; i < key_len(ek->ek_fsidtype)/4; i++) |
| 188 | seq_printf(m, "%08x", ek->ek_fsid[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | if (test_bit(CACHE_VALID, &h->flags) && |
| 190 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
| 191 | seq_printf(m, " "); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 192 | seq_path(m, &ek->ek_path, "\\ \t\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | seq_printf(m, "\n"); |
| 195 | return 0; |
| 196 | } |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 197 | |
| 198 | static inline int expkey_match (struct cache_head *a, struct cache_head *b) |
| 199 | { |
| 200 | struct svc_expkey *orig = container_of(a, struct svc_expkey, h); |
| 201 | struct svc_expkey *new = container_of(b, struct svc_expkey, h); |
| 202 | |
| 203 | if (orig->ek_fsidtype != new->ek_fsidtype || |
| 204 | orig->ek_client != new->ek_client || |
| 205 | memcmp(orig->ek_fsid, new->ek_fsid, key_len(orig->ek_fsidtype)) != 0) |
| 206 | return 0; |
| 207 | return 1; |
| 208 | } |
| 209 | |
| 210 | static inline void expkey_init(struct cache_head *cnew, |
| 211 | struct cache_head *citem) |
| 212 | { |
| 213 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 214 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 215 | |
| 216 | kref_get(&item->ek_client->ref); |
| 217 | new->ek_client = item->ek_client; |
| 218 | new->ek_fsidtype = item->ek_fsidtype; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 219 | |
| 220 | memcpy(new->ek_fsid, item->ek_fsid, sizeof(new->ek_fsid)); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static inline void expkey_update(struct cache_head *cnew, |
| 224 | struct cache_head *citem) |
| 225 | { |
| 226 | struct svc_expkey *new = container_of(cnew, struct svc_expkey, h); |
| 227 | struct svc_expkey *item = container_of(citem, struct svc_expkey, h); |
| 228 | |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 229 | new->ek_path = item->ek_path; |
| 230 | path_get(&item->ek_path); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | static struct cache_head *expkey_alloc(void) |
| 234 | { |
| 235 | struct svc_expkey *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 236 | if (i) |
| 237 | return &i->h; |
| 238 | else |
| 239 | return NULL; |
| 240 | } |
| 241 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 242 | static struct cache_detail svc_expkey_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 243 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | .hash_size = EXPKEY_HASHMAX, |
| 245 | .hash_table = expkey_table, |
| 246 | .name = "nfsd.fh", |
| 247 | .cache_put = expkey_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 248 | .cache_upcall = expkey_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | .cache_parse = expkey_parse, |
| 250 | .cache_show = expkey_show, |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 251 | .match = expkey_match, |
| 252 | .init = expkey_init, |
| 253 | .update = expkey_update, |
| 254 | .alloc = expkey_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 257 | static int |
| 258 | svc_expkey_hash(struct svc_expkey *item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 260 | int hash = item->ek_fsidtype; |
| 261 | char * cp = (char*)item->ek_fsid; |
| 262 | int len = key_len(item->ek_fsidtype); |
| 263 | |
| 264 | hash ^= hash_mem(cp, len, EXPKEY_HASHBITS); |
| 265 | hash ^= hash_ptr(item->ek_client, EXPKEY_HASHBITS); |
| 266 | hash &= EXPKEY_HASHMASK; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 267 | return hash; |
| 268 | } |
| 269 | |
| 270 | static struct svc_expkey * |
| 271 | svc_expkey_lookup(struct svc_expkey *item) |
| 272 | { |
| 273 | struct cache_head *ch; |
| 274 | int hash = svc_expkey_hash(item); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 275 | |
| 276 | ch = sunrpc_cache_lookup(&svc_expkey_cache, &item->h, |
| 277 | hash); |
| 278 | if (ch) |
| 279 | return container_of(ch, struct svc_expkey, h); |
| 280 | else |
| 281 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 284 | static struct svc_expkey * |
| 285 | svc_expkey_update(struct svc_expkey *new, struct svc_expkey *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | { |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 287 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 288 | int hash = svc_expkey_hash(new); |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 289 | |
| 290 | ch = sunrpc_cache_update(&svc_expkey_cache, &new->h, |
| 291 | &old->h, hash); |
| 292 | if (ch) |
| 293 | return container_of(ch, struct svc_expkey, h); |
| 294 | else |
| 295 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
| 299 | #define EXPORT_HASHBITS 8 |
| 300 | #define EXPORT_HASHMAX (1<< EXPORT_HASHBITS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | static struct cache_head *export_table[EXPORT_HASHMAX]; |
| 303 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 304 | static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc) |
| 305 | { |
| 306 | int i; |
| 307 | |
| 308 | for (i = 0; i < fsloc->locations_count; i++) { |
| 309 | kfree(fsloc->locations[i].path); |
| 310 | kfree(fsloc->locations[i].hosts); |
| 311 | } |
| 312 | kfree(fsloc->locations); |
| 313 | } |
| 314 | |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 315 | static void svc_export_put(struct kref *ref) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 317 | struct svc_export *exp = container_of(ref, struct svc_export, h.ref); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 318 | path_put(&exp->ex_path); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 319 | auth_domain_put(exp->ex_client); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 320 | nfsd4_fslocs_free(&exp->ex_fslocs); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 321 | kfree(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | static void svc_export_request(struct cache_detail *cd, |
| 325 | struct cache_head *h, |
| 326 | char **bpp, int *blen) |
| 327 | { |
| 328 | /* client path */ |
| 329 | struct svc_export *exp = container_of(h, struct svc_export, h); |
| 330 | char *pth; |
| 331 | |
| 332 | qword_add(bpp, blen, exp->ex_client->name); |
Jan Blunck | cf28b48 | 2008-02-14 19:38:44 -0800 | [diff] [blame] | 333 | pth = d_path(&exp->ex_path, *bpp, *blen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | if (IS_ERR(pth)) { |
| 335 | /* is this correct? */ |
| 336 | (*bpp)[0] = '\n'; |
| 337 | return; |
| 338 | } |
| 339 | qword_add(bpp, blen, pth); |
| 340 | (*bpp)[-1] = '\n'; |
| 341 | } |
| 342 | |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 343 | static int svc_export_upcall(struct cache_detail *cd, struct cache_head *h) |
| 344 | { |
| 345 | return sunrpc_cache_pipe_upcall(cd, h, svc_export_request); |
| 346 | } |
| 347 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 348 | static struct svc_export *svc_export_update(struct svc_export *new, |
| 349 | struct svc_export *old); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 350 | static struct svc_export *svc_export_lookup(struct svc_export *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 352 | static int check_export(struct inode *inode, int *flags, unsigned char *uuid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | { |
| 354 | |
J. Bruce Fields | f2ca715 | 2009-11-12 17:26:19 -0500 | [diff] [blame] | 355 | /* |
| 356 | * We currently export only dirs, regular files, and (for v4 |
| 357 | * pseudoroot) symlinks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | */ |
| 359 | if (!S_ISDIR(inode->i_mode) && |
J. Bruce Fields | f2ca715 | 2009-11-12 17:26:19 -0500 | [diff] [blame] | 360 | !S_ISLNK(inode->i_mode) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | !S_ISREG(inode->i_mode)) |
| 362 | return -ENOTDIR; |
| 363 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 364 | /* |
| 365 | * Mountd should never pass down a writeable V4ROOT export, but, |
| 366 | * just to make sure: |
| 367 | */ |
| 368 | if (*flags & NFSEXP_V4ROOT) |
| 369 | *flags |= NFSEXP_READONLY; |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | /* There are two requirements on a filesystem to be exportable. |
| 372 | * 1: We must be able to identify the filesystem from a number. |
| 373 | * either a device number (so FS_REQUIRES_DEV needed) |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 374 | * or an FSID number (so NFSEXP_FSID or ->uuid is needed). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | * 2: We must be able to find an inode from a filehandle. |
| 376 | * This means that s_export_op must be set. |
| 377 | */ |
| 378 | if (!(inode->i_sb->s_type->fs_flags & FS_REQUIRES_DEV) && |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 379 | !(*flags & NFSEXP_FSID) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 380 | uuid == NULL) { |
Greg Banks | 3e3b480 | 2006-10-02 02:17:41 -0700 | [diff] [blame] | 381 | dprintk("exp_export: export of non-dev fs without fsid\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | return -EINVAL; |
| 383 | } |
Christoph Hellwig | cfaea78 | 2007-10-21 16:42:16 -0700 | [diff] [blame] | 384 | |
| 385 | if (!inode->i_sb->s_export_op || |
| 386 | !inode->i_sb->s_export_op->fh_to_dentry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | dprintk("exp_export: export of invalid fs type.\n"); |
| 388 | return -EINVAL; |
| 389 | } |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | return 0; |
| 392 | |
| 393 | } |
| 394 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 395 | #ifdef CONFIG_NFSD_V4 |
| 396 | |
| 397 | static int |
| 398 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) |
| 399 | { |
| 400 | int len; |
| 401 | int migrated, i, err; |
| 402 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 403 | /* listsize */ |
| 404 | err = get_int(mesg, &fsloc->locations_count); |
| 405 | if (err) |
| 406 | return err; |
| 407 | if (fsloc->locations_count > MAX_FS_LOCATIONS) |
| 408 | return -EINVAL; |
| 409 | if (fsloc->locations_count == 0) |
| 410 | return 0; |
| 411 | |
| 412 | fsloc->locations = kzalloc(fsloc->locations_count |
| 413 | * sizeof(struct nfsd4_fs_location), GFP_KERNEL); |
| 414 | if (!fsloc->locations) |
| 415 | return -ENOMEM; |
| 416 | for (i=0; i < fsloc->locations_count; i++) { |
| 417 | /* colon separated host list */ |
| 418 | err = -EINVAL; |
| 419 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 420 | if (len <= 0) |
| 421 | goto out_free_all; |
| 422 | err = -ENOMEM; |
| 423 | fsloc->locations[i].hosts = kstrdup(buf, GFP_KERNEL); |
| 424 | if (!fsloc->locations[i].hosts) |
| 425 | goto out_free_all; |
| 426 | err = -EINVAL; |
| 427 | /* slash separated path component list */ |
| 428 | len = qword_get(mesg, buf, PAGE_SIZE); |
| 429 | if (len <= 0) |
| 430 | goto out_free_all; |
| 431 | err = -ENOMEM; |
| 432 | fsloc->locations[i].path = kstrdup(buf, GFP_KERNEL); |
| 433 | if (!fsloc->locations[i].path) |
| 434 | goto out_free_all; |
| 435 | } |
| 436 | /* migrated */ |
| 437 | err = get_int(mesg, &migrated); |
| 438 | if (err) |
| 439 | goto out_free_all; |
| 440 | err = -EINVAL; |
| 441 | if (migrated < 0 || migrated > 1) |
| 442 | goto out_free_all; |
| 443 | fsloc->migrated = migrated; |
| 444 | return 0; |
| 445 | out_free_all: |
| 446 | nfsd4_fslocs_free(fsloc); |
| 447 | return err; |
| 448 | } |
| 449 | |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 450 | static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) |
| 451 | { |
| 452 | int listsize, err; |
| 453 | struct exp_flavor_info *f; |
| 454 | |
| 455 | err = get_int(mesg, &listsize); |
| 456 | if (err) |
| 457 | return err; |
| 458 | if (listsize < 0 || listsize > MAX_SECINFO_LIST) |
| 459 | return -EINVAL; |
| 460 | |
| 461 | for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { |
| 462 | err = get_int(mesg, &f->pseudoflavor); |
| 463 | if (err) |
| 464 | return err; |
| 465 | /* |
Roel Kluin | 80492e7 | 2009-04-21 16:08:39 +0200 | [diff] [blame] | 466 | * XXX: It would be nice to also check whether this |
| 467 | * pseudoflavor is supported, so we can discover the |
| 468 | * problem at export time instead of when a client fails |
| 469 | * to authenticate. |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 470 | */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 471 | err = get_int(mesg, &f->flags); |
| 472 | if (err) |
| 473 | return err; |
| 474 | /* Only some flags are allowed to differ between flavors: */ |
| 475 | if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) |
| 476 | return -EINVAL; |
| 477 | } |
| 478 | exp->ex_nflavors = listsize; |
| 479 | return 0; |
| 480 | } |
| 481 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 482 | #else /* CONFIG_NFSD_V4 */ |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 483 | static inline int |
| 484 | fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} |
| 485 | static inline int |
| 486 | secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 487 | #endif |
| 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) |
| 490 | { |
| 491 | /* client path expiry [flags anonuid anongid fsid] */ |
| 492 | char *buf; |
| 493 | int len; |
| 494 | int err; |
| 495 | struct auth_domain *dom = NULL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 496 | struct svc_export exp = {}, *expp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | int an_int; |
| 498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if (mesg[mlen-1] != '\n') |
| 500 | return -EINVAL; |
| 501 | mesg[mlen-1] = 0; |
| 502 | |
| 503 | buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 504 | if (!buf) |
| 505 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | /* client */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 509 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 510 | if (len <= 0) |
| 511 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | err = -ENOENT; |
| 514 | dom = auth_domain_find(buf); |
| 515 | if (!dom) |
| 516 | goto out; |
| 517 | |
| 518 | /* path */ |
| 519 | err = -EINVAL; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 520 | if ((len = qword_get(&mesg, buf, PAGE_SIZE)) <= 0) |
| 521 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 523 | err = kern_path(buf, 0, &exp.ex_path); |
| 524 | if (err) |
| 525 | goto out1; |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | exp.ex_client = dom; |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | /* expiry */ |
| 530 | err = -EINVAL; |
| 531 | exp.h.expiry_time = get_expiry(&mesg); |
| 532 | if (exp.h.expiry_time == 0) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 533 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | /* flags */ |
| 536 | err = get_int(&mesg, &an_int); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 537 | if (err == -ENOENT) { |
| 538 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | set_bit(CACHE_NEGATIVE, &exp.h.flags); |
J. Bruce Fields | 4a4b883 | 2007-07-31 00:37:53 -0700 | [diff] [blame] | 540 | } else { |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 541 | if (err || an_int < 0) |
| 542 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | exp.ex_flags= an_int; |
| 544 | |
| 545 | /* anon uid */ |
| 546 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 547 | if (err) |
| 548 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | exp.ex_anon_uid= an_int; |
| 550 | |
| 551 | /* anon gid */ |
| 552 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 553 | if (err) |
| 554 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | exp.ex_anon_gid= an_int; |
| 556 | |
| 557 | /* fsid */ |
| 558 | err = get_int(&mesg, &an_int); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 559 | if (err) |
| 560 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | exp.ex_fsid = an_int; |
| 562 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 563 | while ((len = qword_get(&mesg, buf, PAGE_SIZE)) > 0) { |
| 564 | if (strcmp(buf, "fsloc") == 0) |
| 565 | err = fsloc_parse(&mesg, buf, &exp.ex_fslocs); |
| 566 | else if (strcmp(buf, "uuid") == 0) { |
| 567 | /* expect a 16 byte uuid encoded as \xXXXX... */ |
| 568 | len = qword_get(&mesg, buf, PAGE_SIZE); |
| 569 | if (len != 16) |
| 570 | err = -EINVAL; |
| 571 | else { |
| 572 | exp.ex_uuid = |
| 573 | kmemdup(buf, 16, GFP_KERNEL); |
| 574 | if (exp.ex_uuid == NULL) |
| 575 | err = -ENOMEM; |
| 576 | } |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 577 | } else if (strcmp(buf, "secinfo") == 0) |
| 578 | err = secinfo_parse(&mesg, buf, &exp); |
| 579 | else |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 580 | /* quietly ignore unknown words and anything |
| 581 | * following. Newer user-space can try to set |
| 582 | * new values, then see what the result was. |
| 583 | */ |
| 584 | break; |
| 585 | if (err) |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 586 | goto out4; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 587 | } |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 588 | |
J. Bruce Fields | 774b147 | 2009-12-13 20:21:48 -0500 | [diff] [blame] | 589 | err = check_export(exp.ex_path.dentry->d_inode, &exp.ex_flags, |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 590 | exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 591 | if (err) |
| 592 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
| 594 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 595 | expp = svc_export_lookup(&exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if (expp) |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 597 | expp = svc_export_update(&exp, expp); |
| 598 | else |
| 599 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | cache_flush(); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 601 | if (expp == NULL) |
| 602 | err = -ENOMEM; |
| 603 | else |
| 604 | exp_put(expp); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 605 | out4: |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 606 | nfsd4_fslocs_free(&exp.ex_fslocs); |
| 607 | kfree(exp.ex_uuid); |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 608 | out3: |
Al Viro | c1a2a47 | 2008-08-02 01:01:02 -0400 | [diff] [blame] | 609 | path_put(&exp.ex_path); |
| 610 | out1: |
| 611 | auth_domain_put(dom); |
| 612 | out: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 613 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | return err; |
| 615 | } |
| 616 | |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 617 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 618 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs); |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 619 | static void show_secinfo(struct seq_file *m, struct svc_export *exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
| 621 | static int svc_export_show(struct seq_file *m, |
| 622 | struct cache_detail *cd, |
| 623 | struct cache_head *h) |
| 624 | { |
| 625 | struct svc_export *exp ; |
| 626 | |
| 627 | if (h ==NULL) { |
| 628 | seq_puts(m, "#path domain(flags)\n"); |
| 629 | return 0; |
| 630 | } |
| 631 | exp = container_of(h, struct svc_export, h); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 632 | seq_path(m, &exp->ex_path, " \t\n\\"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | seq_putc(m, '\t'); |
| 634 | seq_escape(m, exp->ex_client->name, " \t\n\\"); |
| 635 | seq_putc(m, '('); |
| 636 | if (test_bit(CACHE_VALID, &h->flags) && |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 637 | !test_bit(CACHE_NEGATIVE, &h->flags)) { |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 638 | exp_flags(m, exp->ex_flags, exp->ex_fsid, |
| 639 | exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 640 | if (exp->ex_uuid) { |
| 641 | int i; |
| 642 | seq_puts(m, ",uuid="); |
| 643 | for (i=0; i<16; i++) { |
| 644 | if ((i&3) == 0 && i) |
| 645 | seq_putc(m, ':'); |
| 646 | seq_printf(m, "%02x", exp->ex_uuid[i]); |
| 647 | } |
| 648 | } |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 649 | show_secinfo(m, exp); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | seq_puts(m, ")\n"); |
| 652 | return 0; |
| 653 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 654 | static int svc_export_match(struct cache_head *a, struct cache_head *b) |
| 655 | { |
| 656 | struct svc_export *orig = container_of(a, struct svc_export, h); |
| 657 | struct svc_export *new = container_of(b, struct svc_export, h); |
| 658 | return orig->ex_client == new->ex_client && |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 659 | orig->ex_path.dentry == new->ex_path.dentry && |
| 660 | orig->ex_path.mnt == new->ex_path.mnt; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | static void svc_export_init(struct cache_head *cnew, struct cache_head *citem) |
| 664 | { |
| 665 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 666 | struct svc_export *item = container_of(citem, struct svc_export, h); |
| 667 | |
| 668 | kref_get(&item->ex_client->ref); |
| 669 | new->ex_client = item->ex_client; |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 670 | new->ex_path.dentry = dget(item->ex_path.dentry); |
| 671 | new->ex_path.mnt = mntget(item->ex_path.mnt); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 672 | new->ex_fslocs.locations = NULL; |
| 673 | new->ex_fslocs.locations_count = 0; |
| 674 | new->ex_fslocs.migrated = 0; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | static void export_update(struct cache_head *cnew, struct cache_head *citem) |
| 678 | { |
| 679 | struct svc_export *new = container_of(cnew, struct svc_export, h); |
| 680 | struct svc_export *item = container_of(citem, struct svc_export, h); |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 681 | int i; |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 682 | |
| 683 | new->ex_flags = item->ex_flags; |
| 684 | new->ex_anon_uid = item->ex_anon_uid; |
| 685 | new->ex_anon_gid = item->ex_anon_gid; |
| 686 | new->ex_fsid = item->ex_fsid; |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 687 | new->ex_uuid = item->ex_uuid; |
| 688 | item->ex_uuid = NULL; |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 689 | new->ex_fslocs.locations = item->ex_fslocs.locations; |
| 690 | item->ex_fslocs.locations = NULL; |
| 691 | new->ex_fslocs.locations_count = item->ex_fslocs.locations_count; |
| 692 | item->ex_fslocs.locations_count = 0; |
| 693 | new->ex_fslocs.migrated = item->ex_fslocs.migrated; |
| 694 | item->ex_fslocs.migrated = 0; |
Andy Adamson | e677bfe | 2007-07-17 04:04:42 -0700 | [diff] [blame] | 695 | new->ex_nflavors = item->ex_nflavors; |
| 696 | for (i = 0; i < MAX_SECINFO_LIST; i++) { |
| 697 | new->ex_flavors[i] = item->ex_flavors[i]; |
| 698 | } |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | static struct cache_head *svc_export_alloc(void) |
| 702 | { |
| 703 | struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL); |
| 704 | if (i) |
| 705 | return &i->h; |
| 706 | else |
| 707 | return NULL; |
| 708 | } |
| 709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | struct cache_detail svc_export_cache = { |
Bruce Allan | f35279d | 2005-09-06 15:17:08 -0700 | [diff] [blame] | 711 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | .hash_size = EXPORT_HASHMAX, |
| 713 | .hash_table = export_table, |
| 714 | .name = "nfsd.export", |
| 715 | .cache_put = svc_export_put, |
Trond Myklebust | bc74b4f | 2009-08-09 15:14:29 -0400 | [diff] [blame] | 716 | .cache_upcall = svc_export_upcall, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | .cache_parse = svc_export_parse, |
| 718 | .cache_show = svc_export_show, |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 719 | .match = svc_export_match, |
| 720 | .init = svc_export_init, |
| 721 | .update = export_update, |
| 722 | .alloc = svc_export_alloc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | }; |
| 724 | |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 725 | static int |
| 726 | svc_export_hash(struct svc_export *exp) |
| 727 | { |
| 728 | int hash; |
| 729 | |
| 730 | hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS); |
| 731 | hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS); |
| 732 | hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS); |
| 733 | return hash; |
| 734 | } |
| 735 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 736 | static struct svc_export * |
| 737 | svc_export_lookup(struct svc_export *exp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 739 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 740 | int hash = svc_export_hash(exp); |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 741 | |
| 742 | ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h, |
| 743 | hash); |
| 744 | if (ch) |
| 745 | return container_of(ch, struct svc_export, h); |
| 746 | else |
| 747 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | } |
| 749 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 750 | static struct svc_export * |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 751 | svc_export_update(struct svc_export *new, struct svc_export *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 753 | struct cache_head *ch; |
NeilBrown | 61f8603 | 2010-02-03 17:31:31 +1100 | [diff] [blame] | 754 | int hash = svc_export_hash(old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 756 | ch = sunrpc_cache_update(&svc_export_cache, &new->h, |
| 757 | &old->h, |
| 758 | hash); |
| 759 | if (ch) |
| 760 | return container_of(ch, struct svc_export, h); |
| 761 | else |
| 762 | return NULL; |
| 763 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
| 765 | |
Adrian Bunk | 74cae61 | 2006-03-27 01:15:10 -0800 | [diff] [blame] | 766 | static struct svc_expkey * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp) |
| 768 | { |
| 769 | struct svc_expkey key, *ek; |
| 770 | int err; |
| 771 | |
| 772 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 773 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
| 775 | key.ek_client = clp; |
| 776 | key.ek_fsidtype = fsid_type; |
| 777 | memcpy(key.ek_fsid, fsidv, key_len(fsid_type)); |
| 778 | |
NeilBrown | 8d270f7f | 2006-03-27 01:15:04 -0800 | [diff] [blame] | 779 | ek = svc_expkey_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 780 | if (ek == NULL) |
| 781 | return ERR_PTR(-ENOMEM); |
| 782 | err = cache_check(&svc_expkey_cache, &ek->h, reqp); |
| 783 | if (err) |
| 784 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | return ek; |
| 786 | } |
| 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 789 | static svc_export *exp_get_by_name(svc_client *clp, const struct path *path, |
| 790 | struct cache_req *reqp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | { |
| 792 | struct svc_export *exp, key; |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 793 | int err; |
Jan Blunck | e83aece | 2008-02-14 19:38:41 -0800 | [diff] [blame] | 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | if (!clp) |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 796 | return ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | key.ex_client = clp; |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 799 | key.ex_path = *path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
NeilBrown | 4f7774c | 2006-03-27 01:15:03 -0800 | [diff] [blame] | 801 | exp = svc_export_lookup(&key); |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 802 | if (exp == NULL) |
| 803 | return ERR_PTR(-ENOMEM); |
| 804 | err = cache_check(&svc_export_cache, &exp->h, reqp); |
| 805 | if (err) |
| 806 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | return exp; |
| 808 | } |
| 809 | |
| 810 | /* |
| 811 | * Find the export entry for a given dentry. |
| 812 | */ |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 813 | static struct svc_export *exp_parent(svc_client *clp, struct path *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 815 | struct dentry *saved = dget(path->dentry); |
| 816 | svc_export *exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 818 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 819 | struct dentry *parent = dget_parent(path->dentry); |
| 820 | dput(path->dentry); |
| 821 | path->dentry = parent; |
| 822 | exp = exp_get_by_name(clp, path, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 824 | dput(path->dentry); |
| 825 | path->dentry = saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | return exp; |
| 827 | } |
| 828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
| 831 | /* |
| 832 | * Obtain the root fh on behalf of a client. |
| 833 | * This could be done in user space, but I feel that it adds some safety |
| 834 | * since its harder to fool a kernel module than a user space program. |
| 835 | */ |
| 836 | int |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 837 | 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] | 838 | { |
| 839 | struct svc_export *exp; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 840 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | struct inode *inode; |
| 842 | struct svc_fh fh; |
| 843 | int err; |
| 844 | |
| 845 | err = -EPERM; |
| 846 | /* NB: we probably ought to check that it's NUL-terminated */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 847 | if (kern_path(name, 0, &path)) { |
| 848 | printk("nfsd: exp_rootfh path not found %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | return err; |
| 850 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 851 | inode = path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n", |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 854 | name, path.dentry, clp->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | inode->i_sb->s_id, inode->i_ino); |
Al Viro | 5bf3bd2 | 2009-04-18 02:14:32 -0400 | [diff] [blame] | 856 | exp = exp_parent(clp, &path); |
J.Bruce Fields | 4b41bd8 | 2006-12-13 00:35:21 -0800 | [diff] [blame] | 857 | if (IS_ERR(exp)) { |
| 858 | err = PTR_ERR(exp); |
| 859 | goto out; |
| 860 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
| 862 | /* |
| 863 | * fh must be initialized before calling fh_compose |
| 864 | */ |
| 865 | fh_init(&fh, maxsize); |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 866 | if (fh_compose(&fh, exp, path.dentry, NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | err = -EINVAL; |
| 868 | else |
| 869 | err = 0; |
| 870 | memcpy(f, &fh.fh_handle, sizeof(struct knfsd_fh)); |
| 871 | fh_put(&fh); |
| 872 | exp_put(exp); |
| 873 | out: |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 874 | path_put(&path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | return err; |
| 876 | } |
| 877 | |
Adrian Bunk | cce76f9 | 2007-10-16 01:27:52 -0700 | [diff] [blame] | 878 | static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type, |
| 879 | u32 *fsidv, struct cache_req *reqp) |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 880 | { |
| 881 | struct svc_export *exp; |
| 882 | 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] | 883 | if (IS_ERR(ek)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 884 | return ERR_CAST(ek); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 885 | |
Al Viro | 55430e2 | 2009-04-18 02:04:46 -0400 | [diff] [blame] | 886 | exp = exp_get_by_name(clp, &ek->ek_path, reqp); |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 887 | cache_put(&ek->h, &svc_expkey_cache); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 888 | |
J. Bruce Fields | 2d3bb25 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 889 | if (IS_ERR(exp)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 890 | return ERR_CAST(exp); |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 891 | return exp; |
| 892 | } |
| 893 | |
Andy Adamson | 32c1eb0 | 2007-07-17 04:04:48 -0700 | [diff] [blame] | 894 | __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) |
| 895 | { |
| 896 | struct exp_flavor_info *f; |
| 897 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
| 898 | |
| 899 | /* legacy gss-only clients are always OK: */ |
| 900 | if (exp->ex_client == rqstp->rq_gssclient) |
| 901 | return 0; |
| 902 | /* ip-address based client; check sec= export option: */ |
| 903 | for (f = exp->ex_flavors; f < end; f++) { |
| 904 | if (f->pseudoflavor == rqstp->rq_flavor) |
| 905 | return 0; |
| 906 | } |
| 907 | /* defaults in absence of sec= options: */ |
| 908 | if (exp->ex_nflavors == 0) { |
| 909 | if (rqstp->rq_flavor == RPC_AUTH_NULL || |
| 910 | rqstp->rq_flavor == RPC_AUTH_UNIX) |
| 911 | return 0; |
| 912 | } |
| 913 | return nfserr_wrongsec; |
| 914 | } |
| 915 | |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 916 | /* |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 917 | * Uses rq_client and rq_gssclient to find an export; uses rq_client (an |
| 918 | * auth_unix client) if it's available and has secinfo information; |
| 919 | * otherwise, will try to use rq_gssclient. |
| 920 | * |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 921 | * Called from functions that handle requests; functions that do work on |
| 922 | * behalf of mountd are passed a single client name to use, and should |
| 923 | * use exp_get_by_name() or exp_find(). |
| 924 | */ |
| 925 | struct svc_export * |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 926 | 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] | 927 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 928 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 929 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 930 | if (rqstp->rq_client == NULL) |
| 931 | goto gss; |
| 932 | |
| 933 | /* First try the auth_unix client: */ |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 934 | 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] | 935 | if (PTR_ERR(exp) == -ENOENT) |
| 936 | goto gss; |
| 937 | if (IS_ERR(exp)) |
| 938 | return exp; |
| 939 | /* If it has secinfo, assume there are no gss/... clients */ |
| 940 | if (exp->ex_nflavors > 0) |
| 941 | return exp; |
| 942 | gss: |
| 943 | /* Otherwise, try falling back on gss client */ |
| 944 | if (rqstp->rq_gssclient == NULL) |
| 945 | return exp; |
Al Viro | 91c9fa8 | 2009-04-18 02:42:05 -0400 | [diff] [blame] | 946 | 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] | 947 | if (PTR_ERR(gssexp) == -ENOENT) |
| 948 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 949 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 950 | exp_put(exp); |
| 951 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | struct svc_export * |
| 955 | rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) |
| 956 | { |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 957 | struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 958 | |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 959 | if (rqstp->rq_client == NULL) |
| 960 | goto gss; |
| 961 | |
| 962 | /* First try the auth_unix client: */ |
| 963 | exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); |
| 964 | if (PTR_ERR(exp) == -ENOENT) |
| 965 | goto gss; |
| 966 | if (IS_ERR(exp)) |
| 967 | return exp; |
| 968 | /* If it has secinfo, assume there are no gss/... clients */ |
| 969 | if (exp->ex_nflavors > 0) |
| 970 | return exp; |
| 971 | gss: |
| 972 | /* Otherwise, try falling back on gss client */ |
| 973 | if (rqstp->rq_gssclient == NULL) |
| 974 | return exp; |
| 975 | gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, |
| 976 | &rqstp->rq_chandle); |
| 977 | if (PTR_ERR(gssexp) == -ENOENT) |
| 978 | return exp; |
J. Bruce Fields | 9a25b96 | 2007-07-19 01:49:18 -0700 | [diff] [blame] | 979 | if (!IS_ERR(exp)) |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 980 | exp_put(exp); |
| 981 | return gssexp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | struct svc_export * |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 985 | rqst_exp_parent(struct svc_rqst *rqstp, struct path *path) |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 986 | { |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 987 | struct dentry *saved = dget(path->dentry); |
| 988 | struct svc_export *exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 3ab4d8b | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 989 | |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 990 | while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) { |
| 991 | struct dentry *parent = dget_parent(path->dentry); |
| 992 | dput(path->dentry); |
| 993 | path->dentry = parent; |
| 994 | exp = rqst_exp_get_by_name(rqstp, path); |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 995 | } |
Al Viro | e64c390 | 2009-04-18 03:00:46 -0400 | [diff] [blame] | 996 | dput(path->dentry); |
| 997 | path->dentry = saved; |
J. Bruce Fields | 2ea2209 | 2007-07-17 04:04:46 -0700 | [diff] [blame] | 998 | return exp; |
J. Bruce Fields | 0989a78 | 2007-07-17 04:04:44 -0700 | [diff] [blame] | 999 | } |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1000 | |
Trond Myklebust | ed748aa | 2011-09-12 19:37:06 -0400 | [diff] [blame] | 1001 | struct svc_export *rqst_find_fsidzero_export(struct svc_rqst *rqstp) |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1002 | { |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1003 | u32 fsidv[2]; |
| 1004 | |
| 1005 | mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL); |
| 1006 | |
J. Bruce Fields | 260c64d | 2010-02-08 13:42:26 -0500 | [diff] [blame] | 1007 | return rqst_exp_find(rqstp, FSID_NUM, fsidv); |
J. Bruce Fields | f39bde2 | 2009-09-27 14:41:43 -0400 | [diff] [blame] | 1008 | } |
| 1009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | /* |
| 1011 | * Called when we need the filehandle for the root of the pseudofs, |
| 1012 | * for a given NFSv4 client. The root is defined to be the |
| 1013 | * export point with fsid==0 |
| 1014 | */ |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1015 | __be32 |
J. Bruce Fields | df547ef | 2007-07-17 04:04:43 -0700 | [diff] [blame] | 1016 | exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | { |
NeilBrown | eab7e2e | 2006-03-27 01:15:00 -0800 | [diff] [blame] | 1018 | struct svc_export *exp; |
Al Viro | c7afef1 | 2006-10-19 23:29:02 -0700 | [diff] [blame] | 1019 | __be32 rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Trond Myklebust | ed748aa | 2011-09-12 19:37:06 -0400 | [diff] [blame] | 1021 | exp = rqst_find_fsidzero_export(rqstp); |
J.Bruce Fields | 6899320 | 2006-12-13 00:35:23 -0800 | [diff] [blame] | 1022 | if (IS_ERR(exp)) |
| 1023 | return nfserrno(PTR_ERR(exp)); |
Jan Blunck | 5477549 | 2008-02-14 19:38:39 -0800 | [diff] [blame] | 1024 | rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL); |
J.Bruce Fields | d0ebd9c | 2006-10-04 02:16:10 -0700 | [diff] [blame] | 1025 | exp_put(exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | return rv; |
| 1027 | } |
| 1028 | |
| 1029 | /* Iterator */ |
| 1030 | |
| 1031 | static void *e_start(struct seq_file *m, loff_t *pos) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1032 | __acquires(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | { |
| 1034 | loff_t n = *pos; |
| 1035 | unsigned hash, export; |
| 1036 | struct cache_head *ch; |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | read_lock(&svc_export_cache.hash_lock); |
| 1039 | if (!n--) |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1040 | return SEQ_START_TOKEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | hash = n >> 32; |
| 1042 | export = n & ((1LL<<32) - 1); |
| 1043 | |
| 1044 | |
| 1045 | for (ch=export_table[hash]; ch; ch=ch->next) |
| 1046 | if (!export--) |
| 1047 | return ch; |
| 1048 | n &= ~((1LL<<32) - 1); |
| 1049 | do { |
| 1050 | hash++; |
| 1051 | n += 1LL<<32; |
| 1052 | } while(hash < EXPORT_HASHMAX && export_table[hash]==NULL); |
| 1053 | if (hash >= EXPORT_HASHMAX) |
| 1054 | return NULL; |
| 1055 | *pos = n+1; |
| 1056 | return export_table[hash]; |
| 1057 | } |
| 1058 | |
| 1059 | static void *e_next(struct seq_file *m, void *p, loff_t *pos) |
| 1060 | { |
| 1061 | struct cache_head *ch = p; |
| 1062 | int hash = (*pos >> 32); |
| 1063 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1064 | if (p == SEQ_START_TOKEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | hash = 0; |
| 1066 | else if (ch->next == NULL) { |
| 1067 | hash++; |
| 1068 | *pos += 1LL<<32; |
| 1069 | } else { |
| 1070 | ++*pos; |
| 1071 | return ch->next; |
| 1072 | } |
| 1073 | *pos &= ~((1LL<<32) - 1); |
| 1074 | while (hash < EXPORT_HASHMAX && export_table[hash] == NULL) { |
| 1075 | hash++; |
| 1076 | *pos += 1LL<<32; |
| 1077 | } |
| 1078 | if (hash >= EXPORT_HASHMAX) |
| 1079 | return NULL; |
| 1080 | ++*pos; |
| 1081 | return export_table[hash]; |
| 1082 | } |
| 1083 | |
| 1084 | static void e_stop(struct seq_file *m, void *p) |
Josh Triplett | 896440d | 2006-10-02 02:17:50 -0700 | [diff] [blame] | 1085 | __releases(svc_export_cache.hash_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | { |
| 1087 | read_unlock(&svc_export_cache.hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | } |
| 1089 | |
| 1090 | static struct flags { |
| 1091 | int flag; |
| 1092 | char *name[2]; |
| 1093 | } expflags[] = { |
| 1094 | { NFSEXP_READONLY, {"ro", "rw"}}, |
| 1095 | { NFSEXP_INSECURE_PORT, {"insecure", ""}}, |
| 1096 | { NFSEXP_ROOTSQUASH, {"root_squash", "no_root_squash"}}, |
| 1097 | { NFSEXP_ALLSQUASH, {"all_squash", ""}}, |
| 1098 | { NFSEXP_ASYNC, {"async", "sync"}}, |
| 1099 | { NFSEXP_GATHERED_WRITES, {"wdelay", "no_wdelay"}}, |
| 1100 | { NFSEXP_NOHIDE, {"nohide", ""}}, |
| 1101 | { NFSEXP_CROSSMOUNT, {"crossmnt", ""}}, |
| 1102 | { NFSEXP_NOSUBTREECHECK, {"no_subtree_check", ""}}, |
| 1103 | { NFSEXP_NOAUTHNLM, {"insecure_locks", ""}}, |
Steve Dickson | eb4c86c | 2009-09-09 14:58:22 -0400 | [diff] [blame] | 1104 | { NFSEXP_V4ROOT, {"v4root", ""}}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | { 0, {"", ""}} |
| 1106 | }; |
| 1107 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1108 | static void show_expflags(struct seq_file *m, int flags, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | struct flags *flg; |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1111 | int state, first = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
| 1113 | for (flg = expflags; flg->flag; flg++) { |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1114 | if (flg->flag & ~mask) |
| 1115 | continue; |
| 1116 | state = (flg->flag & flags) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | if (*flg->name[state]) |
| 1118 | seq_printf(m, "%s%s", first++?",":"", flg->name[state]); |
| 1119 | } |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1120 | } |
| 1121 | |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1122 | static void show_secinfo_flags(struct seq_file *m, int flags) |
| 1123 | { |
| 1124 | seq_printf(m, ","); |
| 1125 | show_expflags(m, flags, NFSEXP_SECINFO_FLAGS); |
| 1126 | } |
| 1127 | |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1128 | static bool secinfo_flags_equal(int f, int g) |
| 1129 | { |
| 1130 | f &= NFSEXP_SECINFO_FLAGS; |
| 1131 | g &= NFSEXP_SECINFO_FLAGS; |
| 1132 | return f == g; |
| 1133 | } |
| 1134 | |
| 1135 | static int show_secinfo_run(struct seq_file *m, struct exp_flavor_info **fp, struct exp_flavor_info *end) |
| 1136 | { |
| 1137 | int flags; |
| 1138 | |
| 1139 | flags = (*fp)->flags; |
| 1140 | seq_printf(m, ",sec=%d", (*fp)->pseudoflavor); |
| 1141 | (*fp)++; |
| 1142 | while (*fp != end && secinfo_flags_equal(flags, (*fp)->flags)) { |
| 1143 | seq_printf(m, ":%d", (*fp)->pseudoflavor); |
| 1144 | (*fp)++; |
| 1145 | } |
| 1146 | return flags; |
| 1147 | } |
| 1148 | |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1149 | static void show_secinfo(struct seq_file *m, struct svc_export *exp) |
| 1150 | { |
| 1151 | struct exp_flavor_info *f; |
| 1152 | struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1153 | int flags; |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1154 | |
| 1155 | if (exp->ex_nflavors == 0) |
| 1156 | return; |
J. Bruce Fields | 74ec1e1 | 2010-09-24 17:43:59 -0400 | [diff] [blame] | 1157 | f = exp->ex_flavors; |
| 1158 | flags = show_secinfo_run(m, &f, end); |
| 1159 | if (!secinfo_flags_equal(flags, exp->ex_flags)) |
| 1160 | show_secinfo_flags(m, flags); |
| 1161 | while (f != end) { |
| 1162 | flags = show_secinfo_run(m, &f, end); |
| 1163 | show_secinfo_flags(m, flags); |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1164 | } |
J. Bruce Fields | 91fe39d | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1167 | static void exp_flags(struct seq_file *m, int flag, int fsid, |
| 1168 | uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc) |
| 1169 | { |
| 1170 | show_expflags(m, flag, NFSEXP_ALLFLAGS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | if (flag & NFSEXP_FSID) |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1172 | seq_printf(m, ",fsid=%d", fsid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | if (anonu != (uid_t)-2 && anonu != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1174 | seq_printf(m, ",anonuid=%u", anonu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | if (anong != (gid_t)-2 && anong != (0x10000-2)) |
J. Bruce Fields | 3e63516 | 2007-07-21 04:37:30 -0700 | [diff] [blame] | 1176 | seq_printf(m, ",anongid=%u", anong); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1177 | if (fsloc && fsloc->locations_count > 0) { |
| 1178 | char *loctype = (fsloc->migrated) ? "refer" : "replicas"; |
| 1179 | int i; |
| 1180 | |
J. Bruce Fields | ac34cdb | 2007-07-17 04:04:49 -0700 | [diff] [blame] | 1181 | seq_printf(m, ",%s=", loctype); |
Manoj Naik | 93346919 | 2006-10-04 02:16:18 -0700 | [diff] [blame] | 1182 | seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\"); |
| 1183 | seq_putc(m, '@'); |
| 1184 | seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\"); |
| 1185 | for (i = 1; i < fsloc->locations_count; i++) { |
| 1186 | seq_putc(m, ';'); |
| 1187 | seq_escape(m, fsloc->locations[i].path, ",;@ \t\n\\"); |
| 1188 | seq_putc(m, '@'); |
| 1189 | seq_escape(m, fsloc->locations[i].hosts, ",;@ \t\n\\"); |
| 1190 | } |
| 1191 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
| 1194 | static int e_show(struct seq_file *m, void *p) |
| 1195 | { |
| 1196 | struct cache_head *cp = p; |
| 1197 | struct svc_export *exp = container_of(cp, struct svc_export, h); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
Greg Banks | bc6f02e | 2006-10-02 02:17:49 -0700 | [diff] [blame] | 1199 | if (p == SEQ_START_TOKEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | seq_puts(m, "# Version 1.1\n"); |
| 1201 | seq_puts(m, "# Path Client(Flags) # IPs\n"); |
| 1202 | return 0; |
| 1203 | } |
| 1204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | cache_get(&exp->h); |
| 1206 | if (cache_check(&svc_export_cache, &exp->h, NULL)) |
| 1207 | return 0; |
NeilBrown | baab935 | 2006-03-27 01:15:09 -0800 | [diff] [blame] | 1208 | cache_put(&exp->h, &svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | return svc_export_show(m, &svc_export_cache, cp); |
| 1210 | } |
| 1211 | |
James Morris | 88e9d34 | 2009-09-22 16:43:43 -0700 | [diff] [blame] | 1212 | const struct seq_operations nfs_exports_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | .start = e_start, |
| 1214 | .next = e_next, |
| 1215 | .stop = e_stop, |
| 1216 | .show = e_show, |
| 1217 | }; |
| 1218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
| 1220 | /* |
| 1221 | * Initialize the exports module. |
| 1222 | */ |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1223 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | nfsd_export_init(void) |
| 1225 | { |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1226 | int rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | dprintk("nfsd: initializing export module.\n"); |
| 1228 | |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1229 | rv = cache_register(&svc_export_cache); |
| 1230 | if (rv) |
| 1231 | return rv; |
| 1232 | rv = cache_register(&svc_expkey_cache); |
| 1233 | if (rv) |
| 1234 | cache_unregister(&svc_export_cache); |
| 1235 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
| 1237 | } |
| 1238 | |
| 1239 | /* |
| 1240 | * Flush exports table - called when last nfsd thread is killed |
| 1241 | */ |
| 1242 | void |
| 1243 | nfsd_export_flush(void) |
| 1244 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | cache_purge(&svc_expkey_cache); |
| 1246 | cache_purge(&svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | } |
| 1248 | |
| 1249 | /* |
| 1250 | * Shutdown the exports module. |
| 1251 | */ |
| 1252 | void |
| 1253 | nfsd_export_shutdown(void) |
| 1254 | { |
| 1255 | |
| 1256 | dprintk("nfsd: shutting down export module.\n"); |
| 1257 | |
J. Bruce Fields | df95a9d | 2007-11-08 16:09:59 -0500 | [diff] [blame] | 1258 | cache_unregister(&svc_expkey_cache); |
| 1259 | cache_unregister(&svc_export_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | svcauth_unix_purge(); |
| 1261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | dprintk("nfsd: export shutdown complete.\n"); |
| 1263 | } |