patch-2.1.32 linux/fs/nfsd/nfsctl.c

• Lines: 239
• Date: Fri Apr 4 11:06:02 1997
• Orig file: v2.1.31/linux/fs/nfsd/nfsctl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.31/linux/fs/nfsd/nfsctl.c linux/fs/nfsd/nfsctl.c
@@ -0,0 +1,238 @@
+/*
+ * linux/fs/nfsd/nfsctl.c
+ *
+ * Syscall interface to knfsd.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <linux/linkage.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/net.h>
+#include <linux/in.h>
+#include <linux/nfs.h>
+#include <linux/version.h>
+#include <linux/unistd.h>
+#include <linux/malloc.h>
+
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfsd/xdr.h>
+#include <linux/nfsd/syscall.h>
+
+#if LINUX_VERSION_CODE >= 0x020100
+#include <asm/uaccess.h>
+#else
+# define copy_from_user		memcpy_fromfs
+# define copy_to_user		memcpy_tofs
+# define access_ok		!verify_area
+#endif
+
+extern long sys_call_table[];
+
+static int	nfsctl_svc(struct nfsctl_svc *data);
+static int	nfsctl_addclient(struct nfsctl_client *data);
+static int	nfsctl_delclient(struct nfsctl_client *data);
+static int	nfsctl_export(struct nfsctl_export *data);
+static int	nfsctl_unexport(struct nfsctl_export *data);
+static int	nfsctl_getfh(struct nfsctl_fhparm *, struct knfs_fh *);
+/* static int	nfsctl_ugidupdate(struct nfsctl_ugidmap *data); */
+
+static int	initialized = 0;
+
+/*
+ * Initialize nfsd
+ */
+static void
+nfsd_init(void)
+{
+	nfsd_xdr_init();	/* XDR */
+#ifdef CONFIG_PROC_FS
+	nfsd_stat_init();	/* Statistics */
+#endif
+	nfsd_cache_init();	/* RPC reply cache */
+	nfsd_export_init();	/* Exports table */
+	nfsd_lockd_init();	/* lockd->nfsd callbacks */
+	nfsd_racache_init();	/* Readahead param cache */
+	initialized = 1;
+}
+
+static inline int
+nfsctl_svc(struct nfsctl_svc *data)
+{
+	return nfsd_svc(data->svc_port, data->svc_nthreads);
+}
+
+static inline int
+nfsctl_addclient(struct nfsctl_client *data)
+{
+	return exp_addclient(data);
+}
+
+static inline int
+nfsctl_delclient(struct nfsctl_client *data)
+{
+	return exp_delclient(data);
+}
+
+static inline int
+nfsctl_export(struct nfsctl_export *data)
+{
+	return exp_export(data);
+}
+
+static inline int
+nfsctl_unexport(struct nfsctl_export *data)
+{
+	return exp_unexport(data);
+}
+
+#ifdef notyet
+static inline int
+nfsctl_ugidupdate(nfs_ugidmap *data)
+{
+	return -EINVAL;
+}
+#endif
+
+static inline int
+nfsctl_getfh(struct nfsctl_fhparm *data, struct knfs_fh *res)
+{
+	struct sockaddr_in	*sin;
+	struct svc_client	*clp;
+	int			err = 0;
+
+	if (data->gf_addr.sa_family != AF_INET)
+		return -EPROTONOSUPPORT;
+	if (data->gf_version < 2 || data->gf_version > NFSSVC_MAXVERS)
+		return -EINVAL;
+	sin = (struct sockaddr_in *)&data->gf_addr;
+
+	exp_readlock();
+	if (!(clp = exp_getclient(sin)))
+		err = -EPERM;
+	else
+		err = exp_rootfh(clp, data->gf_dev, data->gf_ino, res);
+	exp_unlock();
+
+	return err;
+}
+
+int
+asmlinkage sys_nfsservctl(int cmd, struct nfsctl_arg *argp, union nfsctl_res *resp)
+{
+	struct nfsctl_arg *	arg = NULL;
+	union nfsctl_res *	res = NULL;
+	int			err;
+
+	if (!initialized)
+		nfsd_init();
+	if (!suser())
+		return -EPERM;
+	if (!access_ok(VERIFY_READ, argp, sizeof(*argp))
+	 || (resp && !access_ok(VERIFY_WRITE, resp, sizeof(*resp))))
+		return -EFAULT;
+	if (!(arg = kmalloc(sizeof(*arg), GFP_USER)) ||
+	    (resp && !(res = kmalloc(sizeof(*res), GFP_USER)))) {
+		err = -ENOMEM;	/* ??? */
+		goto done;
+	}
+	copy_from_user(arg, argp, sizeof(*argp));
+	if (arg->ca_version != NFSCTL_VERSION) {
+		printk(KERN_WARNING "nfsd: incompatible version in syscall.\n");
+		err = -EINVAL;
+		goto done;
+	}
+
+	MOD_INC_USE_COUNT;
+	switch(cmd) {
+	case NFSCTL_SVC:
+		err = nfsctl_svc(&arg->ca_svc);
+		break;
+	case NFSCTL_ADDCLIENT:
+		err = nfsctl_addclient(&arg->ca_client);
+		break;
+	case NFSCTL_DELCLIENT:
+		err = nfsctl_delclient(&arg->ca_client);
+		break;
+	case NFSCTL_EXPORT:
+		err = nfsctl_export(&arg->ca_export);
+		break;
+	case NFSCTL_UNEXPORT:
+		err = nfsctl_unexport(&arg->ca_export);
+		break;
+#ifdef notyet
+	case NFSCTL_UGIDUPDATE:
+		err = nfsctl_ugidupdate(&arg->ca_umap);
+		break;
+#endif
+	case NFSCTL_GETFH:
+		err = nfsctl_getfh(&arg->ca_getfh, &res->cr_getfh);
+		break;
+	default:
+		err = -EINVAL;
+	}
+	MOD_DEC_USE_COUNT;
+
+	if (!err && resp)
+		copy_to_user(resp, res, sizeof(*resp));
+
+done:
+	if (arg)
+		kfree(arg);
+	if (res)
+		kfree(res);
+
+	return err;
+}
+
+#ifdef MODULE
+/* New-style module support since 2.1.18 */
+#if LINUX_VERSION_CODE >= 131346
+EXPORT_NO_SYMBOLS;
+MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
+#endif
+
+static unsigned long	old_syscallvec;
+
+/*
+ * Initialize the module
+ */
+int
+init_module(void)
+{
+	printk("Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
+
+	old_syscallvec = sys_call_table[__NR_nfsservctl];
+	sys_call_table[__NR_nfsservctl] = (unsigned long) sys_nfsservctl;
+	nfsd_init();
+	return 0;
+}
+
+/*
+ * Clean up the mess before unloading the module
+ */
+void
+cleanup_module(void)
+{
+	if (MOD_IN_USE) {
+		printk("nfsd: nfsd busy, remove delayed\n");
+		return;
+	}
+	sys_call_table[__NR_nfsservctl] = old_syscallvec;
+	nfsd_export_shutdown();
+	nfsd_cache_shutdown();
+#ifdef CONFIG_PROC_FS
+	nfsd_stat_shutdown();
+#endif
+	nfsd_lockd_shutdown();
+}
+#endif