2 * linux/fs/nfsd/nfsctl.c
4 * Syscall interface to knfsd.
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
9 #include <linux/config.h>
10 #include <linux/module.h>
12 #include <linux/linkage.h>
13 #include <linux/time.h>
14 #include <linux/errno.h>
16 #include <linux/fcntl.h>
17 #include <linux/net.h>
19 #include <linux/syscalls.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/proc_fs.h>
23 #include <linux/seq_file.h>
24 #include <linux/pagemap.h>
25 #include <linux/init.h>
27 #include <linux/nfs.h>
28 #include <linux/nfsd_idmap.h>
29 #include <linux/sunrpc/svc.h>
30 #include <linux/nfsd/nfsd.h>
31 #include <linux/nfsd/cache.h>
32 #include <linux/nfsd/xdr.h>
33 #include <linux/nfsd/syscall.h>
34 #include <linux/nfsd/interface.h>
36 #include <asm/uaccess.h>
39 * We have a single directory with 9 nodes in it.
57 * write() for these nodes.
59 static ssize_t write_svc(struct file *file, char *buf, size_t size);
60 static ssize_t write_add(struct file *file, char *buf, size_t size);
61 static ssize_t write_del(struct file *file, char *buf, size_t size);
62 static ssize_t write_export(struct file *file, char *buf, size_t size);
63 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
64 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
65 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
66 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
67 static ssize_t write_threads(struct file *file, char *buf, size_t size);
68 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
70 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
71 [NFSD_Svc] = write_svc,
72 [NFSD_Add] = write_add,
73 [NFSD_Del] = write_del,
74 [NFSD_Export] = write_export,
75 [NFSD_Unexport] = write_unexport,
76 [NFSD_Getfd] = write_getfd,
77 [NFSD_Getfs] = write_getfs,
78 [NFSD_Fh] = write_filehandle,
79 [NFSD_Threads] = write_threads,
80 [NFSD_Leasetime] = write_leasetime,
83 /* an argresp is stored in an allocated page and holds the
84 * size of the argument or response, along with its content
92 * transaction based IO methods.
93 * The file expects a single write which triggers the transaction, and then
94 * possibly a read which collects the result - which is stored in a
97 static ssize_t TA_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
99 ino_t ino = file->f_dentry->d_inode->i_ino;
103 if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !write_op[ino])
105 if (file->private_data)
106 return -EINVAL; /* only one write allowed per open */
107 if (size > PAGE_SIZE - sizeof(struct argresp))
110 ar = kmalloc(PAGE_SIZE, GFP_KERNEL);
114 down(&file->f_dentry->d_inode->i_sem);
115 if (file->private_data)
118 file->private_data = ar;
119 up(&file->f_dentry->d_inode->i_sem);
124 if (copy_from_user(ar->data, buf, size))
127 rv = write_op[ino](file, ar->data, size);
136 static ssize_t TA_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
141 if (file->private_data == NULL)
142 rv = TA_write(file, buf, 0, pos);
146 ar = file->private_data;
149 if (*pos >= ar->size)
151 if (*pos + size > ar->size)
152 size = ar->size - *pos;
153 if (copy_to_user(buf, ar->data + *pos, size))
159 static int TA_open(struct inode *inode, struct file *file)
161 file->private_data = NULL;
165 static int TA_release(struct inode *inode, struct file *file)
167 void *p = file->private_data;
168 file->private_data = NULL;
173 static struct file_operations transaction_ops = {
177 .release = TA_release,
180 extern struct seq_operations nfs_exports_op;
181 static int exports_open(struct inode *inode, struct file *file)
183 return seq_open(file, &nfs_exports_op);
186 static struct file_operations exports_operations = {
187 .open = exports_open,
190 .release = seq_release,
193 /*----------------------------------------------------------------------------*/
195 * payload - write methods
196 * If the method has a response, the response should be put in buf,
197 * and the length returned. Otherwise return 0 or and -error.
200 static ssize_t write_svc(struct file *file, char *buf, size_t size)
202 struct nfsctl_svc *data;
203 if (size < sizeof(*data))
205 data = (struct nfsctl_svc*) buf;
206 return nfsd_svc(data->svc_port, data->svc_nthreads);
209 static ssize_t write_add(struct file *file, char *buf, size_t size)
211 struct nfsctl_client *data;
212 if (size < sizeof(*data))
214 data = (struct nfsctl_client *)buf;
215 return exp_addclient(data);
218 static ssize_t write_del(struct file *file, char *buf, size_t size)
220 struct nfsctl_client *data;
221 if (size < sizeof(*data))
223 data = (struct nfsctl_client *)buf;
224 return exp_delclient(data);
227 static ssize_t write_export(struct file *file, char *buf, size_t size)
229 struct nfsctl_export *data;
230 if (size < sizeof(*data))
232 data = (struct nfsctl_export*)buf;
233 return exp_export(data);
236 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
238 struct nfsctl_export *data;
240 if (size < sizeof(*data))
242 data = (struct nfsctl_export*)buf;
243 return exp_unexport(data);
246 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
248 struct nfsctl_fsparm *data;
249 struct sockaddr_in *sin;
250 struct auth_domain *clp;
252 struct knfsd_fh *res;
254 if (size < sizeof(*data))
256 data = (struct nfsctl_fsparm*)buf;
257 err = -EPROTONOSUPPORT;
258 if (data->gd_addr.sa_family != AF_INET)
260 sin = (struct sockaddr_in *)&data->gd_addr;
261 if (data->gd_maxlen > NFS3_FHSIZE)
262 data->gd_maxlen = NFS3_FHSIZE;
264 res = (struct knfsd_fh*)buf;
267 if (!(clp = auth_unix_lookup(sin->sin_addr)))
270 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
271 auth_domain_put(clp);
275 err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
280 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
282 struct nfsctl_fdparm *data;
283 struct sockaddr_in *sin;
284 struct auth_domain *clp;
289 if (size < sizeof(*data))
291 data = (struct nfsctl_fdparm*)buf;
292 err = -EPROTONOSUPPORT;
293 if (data->gd_addr.sa_family != AF_INET)
296 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
300 sin = (struct sockaddr_in *)&data->gd_addr;
302 if (!(clp = auth_unix_lookup(sin->sin_addr)))
305 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
306 auth_domain_put(clp);
311 memset(res,0, NFS_FHSIZE);
312 memcpy(res, &fh.fh_base, fh.fh_size);
319 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
322 * domain path maxsize
326 * qword quoting is used, so filehandle will be \x....
332 struct auth_domain *dom;
335 if (buf[size-1] != '\n')
340 len = qword_get(&mesg, dname, size);
341 if (len <= 0) return -EINVAL;
344 len = qword_get(&mesg, path, size);
345 if (len <= 0) return -EINVAL;
347 len = get_int(&mesg, &maxsize);
351 if (maxsize < NFS_FHSIZE)
353 if (maxsize > NFS3_FHSIZE)
354 maxsize = NFS3_FHSIZE;
356 if (qword_get(&mesg, mesg, size)>0)
359 /* we have all the words, they are in buf.. */
360 dom = unix_domain_find(dname);
364 len = exp_rootfh(dom, path, &fh, maxsize);
365 auth_domain_put(dom);
369 mesg = buf; len = PAGE_SIZE-sizeof(struct argresp);
370 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
375 extern int nfsd_nrthreads(void);
377 static ssize_t write_threads(struct file *file, char *buf, size_t size)
379 /* if size > 0, look for a number of threads and call nfsd_svc
380 * then write out number of threads as reply
386 rv = get_int(&mesg, &newthreads);
391 rv = nfsd_svc(2049, newthreads);
395 sprintf(buf, "%d\n", nfsd_nrthreads());
399 extern time_t nfs4_leasetime(void);
401 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
403 /* if size > 10 seconds, call
404 * nfs4_reset_lease() then write out the new lease (seconds) as reply
411 rv = get_int(&mesg, &lease);
414 if (lease < 10 || lease > 3600)
416 nfs4_reset_lease(lease);
418 sprintf(buf, "%ld\n", nfs4_lease_time());
422 /*----------------------------------------------------------------------------*/
424 * populating the filesystem.
427 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
429 static struct tree_descr nfsd_files[] = {
430 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
431 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
432 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
433 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
434 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
435 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
436 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
437 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
438 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
439 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
440 #ifdef CONFIG_NFSD_V4
441 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
445 return simple_fill_super(sb, 0x6e667364, nfsd_files);
448 static struct super_block *nfsd_get_sb(struct file_system_type *fs_type,
449 int flags, const char *dev_name, void *data)
451 return get_sb_single(fs_type, flags, data, nfsd_fill_super);
454 static struct file_system_type nfsd_fs_type = {
455 .owner = THIS_MODULE,
457 .get_sb = nfsd_get_sb,
458 .kill_sb = kill_litter_super,
461 static int __init init_nfsd(void)
464 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
466 nfsd_stat_init(); /* Statistics */
467 nfsd_cache_init(); /* RPC reply cache */
468 nfsd_export_init(); /* Exports table */
469 nfsd_lockd_init(); /* lockd->nfsd callbacks */
470 #ifdef CONFIG_NFSD_V4
471 nfsd_idmap_init(); /* Name to ID mapping */
472 #endif /* CONFIG_NFSD_V4 */
473 if (proc_mkdir("fs/nfs", NULL)) {
474 struct proc_dir_entry *entry;
475 entry = create_proc_entry("fs/nfs/exports", 0, NULL);
477 entry->proc_fops = &exports_operations;
479 retval = register_filesystem(&nfsd_fs_type);
481 nfsd_export_shutdown();
482 nfsd_cache_shutdown();
483 remove_proc_entry("fs/nfs/exports", NULL);
484 remove_proc_entry("fs/nfs", NULL);
485 nfsd_stat_shutdown();
486 nfsd_lockd_shutdown();
491 static void __exit exit_nfsd(void)
493 nfsd_export_shutdown();
494 nfsd_cache_shutdown();
495 remove_proc_entry("fs/nfs/exports", NULL);
496 remove_proc_entry("fs/nfs", NULL);
497 nfsd_stat_shutdown();
498 nfsd_lockd_shutdown();
499 #ifdef CONFIG_NFSD_V4
500 nfsd_idmap_shutdown();
501 #endif /* CONFIG_NFSD_V4 */
502 unregister_filesystem(&nfsd_fs_type);
505 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
506 MODULE_LICENSE("GPL");
507 module_init(init_nfsd)
508 module_exit(exit_nfsd)