Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfsd/nfsctl.c |
| 3 | * |
| 4 | * Syscall interface to knfsd. |
| 5 | * |
| 6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/module.h> |
| 10 | |
| 11 | #include <linux/linkage.h> |
| 12 | #include <linux/time.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/fcntl.h> |
| 16 | #include <linux/net.h> |
| 17 | #include <linux/in.h> |
| 18 | #include <linux/syscalls.h> |
| 19 | #include <linux/unistd.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/proc_fs.h> |
| 22 | #include <linux/seq_file.h> |
| 23 | #include <linux/pagemap.h> |
| 24 | #include <linux/init.h> |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 25 | #include <linux/string.h> |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 26 | #include <linux/smp_lock.h> |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 27 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <linux/nfs.h> |
| 30 | #include <linux/nfsd_idmap.h> |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 31 | #include <linux/lockd/bind.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/sunrpc/svc.h> |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 33 | #include <linux/sunrpc/svcsock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/nfsd/nfsd.h> |
| 35 | #include <linux/nfsd/cache.h> |
| 36 | #include <linux/nfsd/xdr.h> |
| 37 | #include <linux/nfsd/syscall.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <asm/uaccess.h> |
| 40 | |
| 41 | /* |
| 42 | * We have a single directory with 9 nodes in it. |
| 43 | */ |
| 44 | enum { |
| 45 | NFSD_Root = 1, |
| 46 | NFSD_Svc, |
| 47 | NFSD_Add, |
| 48 | NFSD_Del, |
| 49 | NFSD_Export, |
| 50 | NFSD_Unexport, |
| 51 | NFSD_Getfd, |
| 52 | NFSD_Getfs, |
| 53 | NFSD_List, |
| 54 | NFSD_Fh, |
| 55 | NFSD_Threads, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 56 | NFSD_Pool_Threads, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 57 | NFSD_Versions, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 58 | NFSD_Ports, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 59 | NFSD_MaxBlkSize, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 60 | /* |
| 61 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] |
| 62 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops |
| 63 | */ |
| 64 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | NFSD_Leasetime, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 66 | NFSD_RecoveryDir, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 67 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | /* |
| 71 | * write() for these nodes. |
| 72 | */ |
| 73 | static ssize_t write_svc(struct file *file, char *buf, size_t size); |
| 74 | static ssize_t write_add(struct file *file, char *buf, size_t size); |
| 75 | static ssize_t write_del(struct file *file, char *buf, size_t size); |
| 76 | static ssize_t write_export(struct file *file, char *buf, size_t size); |
| 77 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); |
| 78 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); |
| 79 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); |
| 80 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
| 81 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 82 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 83 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 84 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 85 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 86 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 88 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 89 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { |
| 92 | [NFSD_Svc] = write_svc, |
| 93 | [NFSD_Add] = write_add, |
| 94 | [NFSD_Del] = write_del, |
| 95 | [NFSD_Export] = write_export, |
| 96 | [NFSD_Unexport] = write_unexport, |
| 97 | [NFSD_Getfd] = write_getfd, |
| 98 | [NFSD_Getfs] = write_getfs, |
| 99 | [NFSD_Fh] = write_filehandle, |
| 100 | [NFSD_Threads] = write_threads, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 101 | [NFSD_Pool_Threads] = write_pool_threads, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 102 | [NFSD_Versions] = write_versions, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 103 | [NFSD_Ports] = write_ports, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 104 | [NFSD_MaxBlkSize] = write_maxblksize, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 105 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | [NFSD_Leasetime] = write_leasetime, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 107 | [NFSD_RecoveryDir] = write_recoverydir, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 108 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
| 112 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 113 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | char *data; |
| 115 | ssize_t rv; |
| 116 | |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 117 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return -EINVAL; |
| 119 | |
| 120 | data = simple_transaction_get(file, buf, size); |
| 121 | if (IS_ERR(data)) |
| 122 | return PTR_ERR(data); |
| 123 | |
| 124 | rv = write_op[ino](file, data, size); |
NeilBrown | 8971a10 | 2007-02-14 00:33:11 -0800 | [diff] [blame] | 125 | if (rv >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | simple_transaction_set(file, rv); |
| 127 | rv = size; |
| 128 | } |
| 129 | return rv; |
| 130 | } |
| 131 | |
NeilBrown | 7390022 | 2005-11-07 01:00:24 -0800 | [diff] [blame] | 132 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
| 133 | { |
| 134 | if (! file->private_data) { |
| 135 | /* An attempt to read a transaction file without writing |
| 136 | * causes a 0-byte write so that the file can return |
| 137 | * state information |
| 138 | */ |
| 139 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); |
| 140 | if (rv < 0) |
| 141 | return rv; |
| 142 | } |
| 143 | return simple_transaction_read(file, buf, size, pos); |
| 144 | } |
| 145 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 146 | static const struct file_operations transaction_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | .write = nfsctl_transaction_write, |
NeilBrown | 7390022 | 2005-11-07 01:00:24 -0800 | [diff] [blame] | 148 | .read = nfsctl_transaction_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | .release = simple_transaction_release, |
| 150 | }; |
| 151 | |
| 152 | extern struct seq_operations nfs_exports_op; |
| 153 | static int exports_open(struct inode *inode, struct file *file) |
| 154 | { |
| 155 | return seq_open(file, &nfs_exports_op); |
| 156 | } |
| 157 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 158 | static const struct file_operations exports_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | .open = exports_open, |
| 160 | .read = seq_read, |
| 161 | .llseek = seq_lseek, |
| 162 | .release = seq_release, |
| 163 | }; |
| 164 | |
| 165 | /*----------------------------------------------------------------------------*/ |
| 166 | /* |
| 167 | * payload - write methods |
| 168 | * If the method has a response, the response should be put in buf, |
| 169 | * and the length returned. Otherwise return 0 or and -error. |
| 170 | */ |
| 171 | |
| 172 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
| 173 | { |
| 174 | struct nfsctl_svc *data; |
| 175 | if (size < sizeof(*data)) |
| 176 | return -EINVAL; |
| 177 | data = (struct nfsctl_svc*) buf; |
| 178 | return nfsd_svc(data->svc_port, data->svc_nthreads); |
| 179 | } |
| 180 | |
| 181 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
| 182 | { |
| 183 | struct nfsctl_client *data; |
| 184 | if (size < sizeof(*data)) |
| 185 | return -EINVAL; |
| 186 | data = (struct nfsctl_client *)buf; |
| 187 | return exp_addclient(data); |
| 188 | } |
| 189 | |
| 190 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
| 191 | { |
| 192 | struct nfsctl_client *data; |
| 193 | if (size < sizeof(*data)) |
| 194 | return -EINVAL; |
| 195 | data = (struct nfsctl_client *)buf; |
| 196 | return exp_delclient(data); |
| 197 | } |
| 198 | |
| 199 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
| 200 | { |
| 201 | struct nfsctl_export *data; |
| 202 | if (size < sizeof(*data)) |
| 203 | return -EINVAL; |
| 204 | data = (struct nfsctl_export*)buf; |
| 205 | return exp_export(data); |
| 206 | } |
| 207 | |
| 208 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
| 209 | { |
| 210 | struct nfsctl_export *data; |
| 211 | |
| 212 | if (size < sizeof(*data)) |
| 213 | return -EINVAL; |
| 214 | data = (struct nfsctl_export*)buf; |
| 215 | return exp_unexport(data); |
| 216 | } |
| 217 | |
| 218 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
| 219 | { |
| 220 | struct nfsctl_fsparm *data; |
| 221 | struct sockaddr_in *sin; |
| 222 | struct auth_domain *clp; |
| 223 | int err = 0; |
| 224 | struct knfsd_fh *res; |
| 225 | |
| 226 | if (size < sizeof(*data)) |
| 227 | return -EINVAL; |
| 228 | data = (struct nfsctl_fsparm*)buf; |
| 229 | err = -EPROTONOSUPPORT; |
| 230 | if (data->gd_addr.sa_family != AF_INET) |
| 231 | goto out; |
| 232 | sin = (struct sockaddr_in *)&data->gd_addr; |
| 233 | if (data->gd_maxlen > NFS3_FHSIZE) |
| 234 | data->gd_maxlen = NFS3_FHSIZE; |
| 235 | |
| 236 | res = (struct knfsd_fh*)buf; |
| 237 | |
| 238 | exp_readlock(); |
| 239 | if (!(clp = auth_unix_lookup(sin->sin_addr))) |
| 240 | err = -EPERM; |
| 241 | else { |
| 242 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); |
| 243 | auth_domain_put(clp); |
| 244 | } |
| 245 | exp_readunlock(); |
| 246 | if (err == 0) |
Andrew Morton | 1212749 | 2007-07-17 04:04:34 -0700 | [diff] [blame] | 247 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | out: |
| 249 | return err; |
| 250 | } |
| 251 | |
| 252 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
| 253 | { |
| 254 | struct nfsctl_fdparm *data; |
| 255 | struct sockaddr_in *sin; |
| 256 | struct auth_domain *clp; |
| 257 | int err = 0; |
| 258 | struct knfsd_fh fh; |
| 259 | char *res; |
| 260 | |
| 261 | if (size < sizeof(*data)) |
| 262 | return -EINVAL; |
| 263 | data = (struct nfsctl_fdparm*)buf; |
| 264 | err = -EPROTONOSUPPORT; |
| 265 | if (data->gd_addr.sa_family != AF_INET) |
| 266 | goto out; |
| 267 | err = -EINVAL; |
| 268 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) |
| 269 | goto out; |
| 270 | |
| 271 | res = buf; |
| 272 | sin = (struct sockaddr_in *)&data->gd_addr; |
| 273 | exp_readlock(); |
| 274 | if (!(clp = auth_unix_lookup(sin->sin_addr))) |
| 275 | err = -EPERM; |
| 276 | else { |
| 277 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); |
| 278 | auth_domain_put(clp); |
| 279 | } |
| 280 | exp_readunlock(); |
| 281 | |
| 282 | if (err == 0) { |
| 283 | memset(res,0, NFS_FHSIZE); |
| 284 | memcpy(res, &fh.fh_base, fh.fh_size); |
| 285 | err = NFS_FHSIZE; |
| 286 | } |
| 287 | out: |
| 288 | return err; |
| 289 | } |
| 290 | |
| 291 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
| 292 | { |
| 293 | /* request is: |
| 294 | * domain path maxsize |
| 295 | * response is |
| 296 | * filehandle |
| 297 | * |
| 298 | * qword quoting is used, so filehandle will be \x.... |
| 299 | */ |
| 300 | char *dname, *path; |
Andrew Morton | 246d95b | 2007-08-09 00:53:50 -0700 | [diff] [blame] | 301 | int uninitialized_var(maxsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | char *mesg = buf; |
| 303 | int len; |
| 304 | struct auth_domain *dom; |
| 305 | struct knfsd_fh fh; |
| 306 | |
| 307 | if (buf[size-1] != '\n') |
| 308 | return -EINVAL; |
| 309 | buf[size-1] = 0; |
| 310 | |
| 311 | dname = mesg; |
| 312 | len = qword_get(&mesg, dname, size); |
| 313 | if (len <= 0) return -EINVAL; |
| 314 | |
| 315 | path = dname+len+1; |
| 316 | len = qword_get(&mesg, path, size); |
| 317 | if (len <= 0) return -EINVAL; |
| 318 | |
| 319 | len = get_int(&mesg, &maxsize); |
| 320 | if (len) |
| 321 | return len; |
| 322 | |
| 323 | if (maxsize < NFS_FHSIZE) |
| 324 | return -EINVAL; |
| 325 | if (maxsize > NFS3_FHSIZE) |
| 326 | maxsize = NFS3_FHSIZE; |
| 327 | |
| 328 | if (qword_get(&mesg, mesg, size)>0) |
| 329 | return -EINVAL; |
| 330 | |
| 331 | /* we have all the words, they are in buf.. */ |
| 332 | dom = unix_domain_find(dname); |
| 333 | if (!dom) |
| 334 | return -ENOMEM; |
| 335 | |
| 336 | len = exp_rootfh(dom, path, &fh, maxsize); |
| 337 | auth_domain_put(dom); |
| 338 | if (len) |
| 339 | return len; |
| 340 | |
| 341 | mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; |
| 342 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
| 343 | mesg[-1] = '\n'; |
| 344 | return mesg - buf; |
| 345 | } |
| 346 | |
| 347 | extern int nfsd_nrthreads(void); |
| 348 | |
| 349 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
| 350 | { |
| 351 | /* if size > 0, look for a number of threads and call nfsd_svc |
| 352 | * then write out number of threads as reply |
| 353 | */ |
| 354 | char *mesg = buf; |
| 355 | int rv; |
| 356 | if (size > 0) { |
| 357 | int newthreads; |
| 358 | rv = get_int(&mesg, &newthreads); |
| 359 | if (rv) |
| 360 | return rv; |
| 361 | if (newthreads <0) |
| 362 | return -EINVAL; |
| 363 | rv = nfsd_svc(2049, newthreads); |
| 364 | if (rv) |
| 365 | return rv; |
| 366 | } |
| 367 | sprintf(buf, "%d\n", nfsd_nrthreads()); |
| 368 | return strlen(buf); |
| 369 | } |
| 370 | |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 371 | extern int nfsd_nrpools(void); |
| 372 | extern int nfsd_get_nrthreads(int n, int *); |
| 373 | extern int nfsd_set_nrthreads(int n, int *); |
| 374 | |
| 375 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
| 376 | { |
| 377 | /* if size > 0, look for an array of number of threads per node |
| 378 | * and apply them then write out number of threads per node as reply |
| 379 | */ |
| 380 | char *mesg = buf; |
| 381 | int i; |
| 382 | int rv; |
| 383 | int len; |
| 384 | int npools = nfsd_nrpools(); |
| 385 | int *nthreads; |
| 386 | |
| 387 | if (npools == 0) { |
| 388 | /* |
| 389 | * NFS is shut down. The admin can start it by |
| 390 | * writing to the threads file but NOT the pool_threads |
| 391 | * file, sorry. Report zero threads. |
| 392 | */ |
| 393 | strcpy(buf, "0\n"); |
| 394 | return strlen(buf); |
| 395 | } |
| 396 | |
| 397 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); |
| 398 | if (nthreads == NULL) |
| 399 | return -ENOMEM; |
| 400 | |
| 401 | if (size > 0) { |
| 402 | for (i = 0; i < npools; i++) { |
| 403 | rv = get_int(&mesg, &nthreads[i]); |
| 404 | if (rv == -ENOENT) |
| 405 | break; /* fewer numbers than pools */ |
| 406 | if (rv) |
| 407 | goto out_free; /* syntax error */ |
| 408 | rv = -EINVAL; |
| 409 | if (nthreads[i] < 0) |
| 410 | goto out_free; |
| 411 | } |
| 412 | rv = nfsd_set_nrthreads(i, nthreads); |
| 413 | if (rv) |
| 414 | goto out_free; |
| 415 | } |
| 416 | |
| 417 | rv = nfsd_get_nrthreads(npools, nthreads); |
| 418 | if (rv) |
| 419 | goto out_free; |
| 420 | |
| 421 | mesg = buf; |
| 422 | size = SIMPLE_TRANSACTION_LIMIT; |
| 423 | for (i = 0; i < npools && size > 0; i++) { |
| 424 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); |
| 425 | len = strlen(mesg); |
| 426 | size -= len; |
| 427 | mesg += len; |
| 428 | } |
| 429 | |
| 430 | return (mesg-buf); |
| 431 | |
| 432 | out_free: |
| 433 | kfree(nthreads); |
| 434 | return rv; |
| 435 | } |
| 436 | |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 437 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
| 438 | { |
| 439 | /* |
| 440 | * Format: |
| 441 | * [-/+]vers [-/+]vers ... |
| 442 | */ |
| 443 | char *mesg = buf; |
| 444 | char *vers, sign; |
| 445 | int len, num; |
| 446 | ssize_t tlen = 0; |
| 447 | char *sep; |
| 448 | |
| 449 | if (size>0) { |
| 450 | if (nfsd_serv) |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 451 | /* Cannot change versions without updating |
| 452 | * nfsd_serv->sv_xdrsize, and reallocing |
| 453 | * rq_argp and rq_resp |
| 454 | */ |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 455 | return -EBUSY; |
| 456 | if (buf[size-1] != '\n') |
| 457 | return -EINVAL; |
| 458 | buf[size-1] = 0; |
| 459 | |
| 460 | vers = mesg; |
| 461 | len = qword_get(&mesg, vers, size); |
| 462 | if (len <= 0) return -EINVAL; |
| 463 | do { |
| 464 | sign = *vers; |
| 465 | if (sign == '+' || sign == '-') |
| 466 | num = simple_strtol((vers+1), NULL, 0); |
| 467 | else |
| 468 | num = simple_strtol(vers, NULL, 0); |
| 469 | switch(num) { |
| 470 | case 2: |
| 471 | case 3: |
| 472 | case 4: |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 473 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 474 | break; |
| 475 | default: |
| 476 | return -EINVAL; |
| 477 | } |
| 478 | vers += len + 1; |
| 479 | tlen += len; |
| 480 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
| 481 | /* If all get turned off, turn them back on, as |
| 482 | * having no versions is BAD |
| 483 | */ |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 484 | nfsd_reset_versions(); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 485 | } |
| 486 | /* Now write current state into reply buffer */ |
| 487 | len = 0; |
| 488 | sep = ""; |
| 489 | for (num=2 ; num <= 4 ; num++) |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 490 | if (nfsd_vers(num, NFSD_AVAIL)) { |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 491 | len += sprintf(buf+len, "%s%c%d", sep, |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 492 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 493 | num); |
| 494 | sep = " "; |
| 495 | } |
| 496 | len += sprintf(buf+len, "\n"); |
| 497 | return len; |
| 498 | } |
| 499 | |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 500 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
| 501 | { |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 502 | if (size == 0) { |
| 503 | int len = 0; |
| 504 | lock_kernel(); |
| 505 | if (nfsd_serv) |
| 506 | len = svc_sock_names(buf, nfsd_serv, NULL); |
| 507 | unlock_kernel(); |
| 508 | return len; |
| 509 | } |
| 510 | /* Either a single 'fd' number is written, in which |
| 511 | * case it must be for a socket of a supported family/protocol, |
| 512 | * and we use it as an nfsd socket, or |
| 513 | * A '-' followed by the 'name' of a socket in which case |
| 514 | * we close the socket. |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 515 | */ |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 516 | if (isdigit(buf[0])) { |
| 517 | char *mesg = buf; |
| 518 | int fd; |
| 519 | int err; |
| 520 | err = get_int(&mesg, &fd); |
| 521 | if (err) |
| 522 | return -EINVAL; |
| 523 | if (fd < 0) |
| 524 | return -EINVAL; |
| 525 | err = nfsd_create_serv(); |
| 526 | if (!err) { |
| 527 | int proto = 0; |
NeilBrown | 5680c44 | 2006-10-04 02:15:45 -0700 | [diff] [blame] | 528 | err = svc_addsock(nfsd_serv, fd, buf, &proto); |
| 529 | if (err >= 0) { |
| 530 | err = lockd_up(proto); |
| 531 | if (err < 0) |
| 532 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); |
NeilBrown | 3dfb421 | 2006-10-02 02:17:51 -0700 | [diff] [blame] | 533 | } |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 534 | /* Decrease the count, but don't shutdown the |
| 535 | * the service |
| 536 | */ |
NeilBrown | cda9e0c | 2006-10-04 02:15:44 -0700 | [diff] [blame] | 537 | lock_kernel(); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 538 | nfsd_serv->sv_nrthreads--; |
NeilBrown | cda9e0c | 2006-10-04 02:15:44 -0700 | [diff] [blame] | 539 | unlock_kernel(); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 540 | } |
NeilBrown | 5680c44 | 2006-10-04 02:15:45 -0700 | [diff] [blame] | 541 | return err < 0 ? err : 0; |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 542 | } |
| 543 | if (buf[0] == '-') { |
| 544 | char *toclose = kstrdup(buf+1, GFP_KERNEL); |
| 545 | int len = 0; |
| 546 | if (!toclose) |
| 547 | return -ENOMEM; |
| 548 | lock_kernel(); |
| 549 | if (nfsd_serv) |
| 550 | len = svc_sock_names(buf, nfsd_serv, toclose); |
| 551 | unlock_kernel(); |
NeilBrown | 37a0347 | 2006-10-04 02:15:44 -0700 | [diff] [blame] | 552 | if (len >= 0) |
| 553 | lockd_down(); |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 554 | kfree(toclose); |
| 555 | return len; |
| 556 | } |
| 557 | return -EINVAL; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 558 | } |
| 559 | |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 560 | int nfsd_max_blksize; |
| 561 | |
| 562 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
| 563 | { |
| 564 | char *mesg = buf; |
| 565 | if (size > 0) { |
| 566 | int bsize; |
| 567 | int rv = get_int(&mesg, &bsize); |
| 568 | if (rv) |
| 569 | return rv; |
| 570 | /* force bsize into allowed range and |
| 571 | * required alignment. |
| 572 | */ |
| 573 | if (bsize < 1024) |
| 574 | bsize = 1024; |
| 575 | if (bsize > NFSSVC_MAXBLKSIZE) |
| 576 | bsize = NFSSVC_MAXBLKSIZE; |
| 577 | bsize &= ~(1024-1); |
| 578 | lock_kernel(); |
| 579 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
| 580 | unlock_kernel(); |
| 581 | return -EBUSY; |
| 582 | } |
| 583 | nfsd_max_blksize = bsize; |
| 584 | unlock_kernel(); |
| 585 | } |
| 586 | return sprintf(buf, "%d\n", nfsd_max_blksize); |
| 587 | } |
| 588 | |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 589 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | extern time_t nfs4_leasetime(void); |
| 591 | |
| 592 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
| 593 | { |
| 594 | /* if size > 10 seconds, call |
| 595 | * nfs4_reset_lease() then write out the new lease (seconds) as reply |
| 596 | */ |
| 597 | char *mesg = buf; |
| 598 | int rv; |
| 599 | |
| 600 | if (size > 0) { |
| 601 | int lease; |
| 602 | rv = get_int(&mesg, &lease); |
| 603 | if (rv) |
| 604 | return rv; |
| 605 | if (lease < 10 || lease > 3600) |
| 606 | return -EINVAL; |
| 607 | nfs4_reset_lease(lease); |
| 608 | } |
| 609 | sprintf(buf, "%ld\n", nfs4_lease_time()); |
| 610 | return strlen(buf); |
| 611 | } |
| 612 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 613 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
| 614 | { |
| 615 | char *mesg = buf; |
| 616 | char *recdir; |
| 617 | int len, status; |
| 618 | |
| 619 | if (size > PATH_MAX || buf[size-1] != '\n') |
| 620 | return -EINVAL; |
| 621 | buf[size-1] = 0; |
| 622 | |
| 623 | recdir = mesg; |
| 624 | len = qword_get(&mesg, recdir, size); |
| 625 | if (len <= 0) |
| 626 | return -EINVAL; |
| 627 | |
| 628 | status = nfs4_reset_recoverydir(recdir); |
| 629 | return strlen(buf); |
| 630 | } |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 631 | #endif |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | /*----------------------------------------------------------------------------*/ |
| 634 | /* |
| 635 | * populating the filesystem. |
| 636 | */ |
| 637 | |
| 638 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) |
| 639 | { |
| 640 | static struct tree_descr nfsd_files[] = { |
| 641 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, |
| 642 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, |
| 643 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, |
| 644 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, |
| 645 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, |
| 646 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, |
| 647 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, |
| 648 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, |
| 649 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
| 650 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 651 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 652 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 653 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 654 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | #ifdef CONFIG_NFSD_V4 |
| 656 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 657 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | #endif |
| 659 | /* last one */ {""} |
| 660 | }; |
| 661 | return simple_fill_super(sb, 0x6e667364, nfsd_files); |
| 662 | } |
| 663 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 664 | static int nfsd_get_sb(struct file_system_type *fs_type, |
| 665 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 667 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | static struct file_system_type nfsd_fs_type = { |
| 671 | .owner = THIS_MODULE, |
| 672 | .name = "nfsd", |
| 673 | .get_sb = nfsd_get_sb, |
| 674 | .kill_sb = kill_litter_super, |
| 675 | }; |
| 676 | |
| 677 | static int __init init_nfsd(void) |
| 678 | { |
| 679 | int retval; |
| 680 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); |
| 681 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 682 | retval = nfs4_state_init(); /* nfs4 locking state */ |
| 683 | if (retval) |
| 684 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | nfsd_stat_init(); /* Statistics */ |
| 686 | nfsd_cache_init(); /* RPC reply cache */ |
| 687 | nfsd_export_init(); /* Exports table */ |
| 688 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | nfsd_idmap_init(); /* Name to ID mapping */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | if (proc_mkdir("fs/nfs", NULL)) { |
| 691 | struct proc_dir_entry *entry; |
| 692 | entry = create_proc_entry("fs/nfs/exports", 0, NULL); |
| 693 | if (entry) |
| 694 | entry->proc_fops = &exports_operations; |
| 695 | } |
| 696 | retval = register_filesystem(&nfsd_fs_type); |
| 697 | if (retval) { |
| 698 | nfsd_export_shutdown(); |
| 699 | nfsd_cache_shutdown(); |
| 700 | remove_proc_entry("fs/nfs/exports", NULL); |
| 701 | remove_proc_entry("fs/nfs", NULL); |
| 702 | nfsd_stat_shutdown(); |
| 703 | nfsd_lockd_shutdown(); |
| 704 | } |
| 705 | return retval; |
| 706 | } |
| 707 | |
| 708 | static void __exit exit_nfsd(void) |
| 709 | { |
| 710 | nfsd_export_shutdown(); |
| 711 | nfsd_cache_shutdown(); |
| 712 | remove_proc_entry("fs/nfs/exports", NULL); |
| 713 | remove_proc_entry("fs/nfs", NULL); |
| 714 | nfsd_stat_shutdown(); |
| 715 | nfsd_lockd_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | nfsd_idmap_shutdown(); |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 717 | nfsd4_free_slabs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | unregister_filesystem(&nfsd_fs_type); |
| 719 | } |
| 720 | |
| 721 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 722 | MODULE_LICENSE("GPL"); |
| 723 | module_init(init_nfsd) |
| 724 | module_exit(exit_nfsd) |