4 * This should eventually move to userland.
7 #include <linux/config.h>
8 #include <linux/file.h>
10 #include <linux/sunrpc/svc.h>
11 #include <linux/nfsd/nfsd.h>
12 #include <linux/nfsd/syscall.h>
13 #include <linux/linkage.h>
14 #include <linux/namei.h>
15 #include <linux/mount.h>
16 #include <asm/uaccess.h>
19 * open a file on nfsd fs
22 static struct file *do_open(char *name, int flags)
27 nd.mnt = do_kern_mount("nfsd", 0, "nfsd", NULL);
30 return (struct file *)nd.mnt;
32 nd.dentry = dget(nd.mnt->mnt_root);
33 nd.last_type = LAST_ROOT;
36 error = path_walk(name, &nd);
38 return ERR_PTR(error);
41 error = may_open(&nd,MAY_READ|MAY_WRITE,FMODE_READ|FMODE_WRITE);
43 error = may_open(&nd, MAY_WRITE, FMODE_WRITE);
46 return dentry_open(nd.dentry, nd.mnt, flags);
49 return ERR_PTR(error);
53 char *name; int wsize; int rsize;
57 .wsize = sizeof(struct nfsctl_svc)
59 [NFSCTL_ADDCLIENT] = {
61 .wsize = sizeof(struct nfsctl_client)
63 [NFSCTL_DELCLIENT] = {
65 .wsize = sizeof(struct nfsctl_client)
69 .wsize = sizeof(struct nfsctl_export)
73 .wsize = sizeof(struct nfsctl_export)
77 .wsize = sizeof(struct nfsctl_fdparm),
82 .wsize = sizeof(struct nfsctl_fsparm),
83 .rsize = sizeof(struct knfsd_fh)
88 asmlinkage sys_nfsservctl(int cmd, struct nfsctl_arg __user *arg, void __user *res)
91 void __user *p = &arg->u;
95 if (copy_from_user(&version, &arg->ca_version, sizeof(int)))
98 if (version != NFSCTL_VERSION) {
99 printk(KERN_WARNING "nfsd: incompatible version in syscall.\n");
103 if (cmd < 0 || cmd >= sizeof(map)/sizeof(map[0]) || !map[cmd].name)
106 file = do_open(map[cmd].name, map[cmd].rsize ? O_RDWR : O_WRONLY);
108 return PTR_ERR(file);
109 err = file->f_op->write(file, p, map[cmd].wsize, &file->f_pos);
110 if (err >= 0 && map[cmd].rsize)
111 err = file->f_op->read(file, res, map[cmd].rsize, &file->f_pos);