Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 438 insertions, 0 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
new file mode 100644
index 000000000000..161afdcb8f7d
--- /dev/null
+++ b/fs/nfsd/nfsctl.c
@@ -0,0 +1,438 @@
+/*
+ * 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/linkage.h>
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/net.h>
+#include <linux/in.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/pagemap.h>
+#include <linux/init.h>
+
+#include <linux/nfs.h>
+#include <linux/nfsd_idmap.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>
+#include <linux/nfsd/interface.h>
+
+#include <asm/uaccess.h>
+
+/*
+ *      We have a single directory with 9 nodes in it.
+ */
+enum {
+        NFSD_Root = 1,
+        NFSD_Svc,
+        NFSD_Add,
+        NFSD_Del,
+        NFSD_Export,
+        NFSD_Unexport,
+        NFSD_Getfd,
+        NFSD_Getfs,
+        NFSD_List,
+        NFSD_Fh,
+        NFSD_Threads,
+        NFSD_Leasetime,
+};
+
+/*
+ * write() for these nodes.
+ */
+static ssize_t write_svc(struct file *file, char *buf, size_t size);
+static ssize_t write_add(struct file *file, char *buf, size_t size);
+static ssize_t write_del(struct file *file, char *buf, size_t size);
+static ssize_t write_export(struct file *file, char *buf, size_t size);
+static ssize_t write_unexport(struct file *file, char *buf, size_t size);
+static ssize_t write_getfd(struct file *file, char *buf, size_t size);
+static ssize_t write_getfs(struct file *file, char *buf, size_t size);
+static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
+static ssize_t write_threads(struct file *file, char *buf, size_t size);
+static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
+
+static ssize_t (*write_op[])(struct file *, char *, size_t) = {
+        [NFSD_Svc] = write_svc,
+        [NFSD_Add] = write_add,
+        [NFSD_Del] = write_del,
+        [NFSD_Export] = write_export,
+        [NFSD_Unexport] = write_unexport,
+        [NFSD_Getfd] = write_getfd,
+        [NFSD_Getfs] = write_getfs,
+        [NFSD_Fh] = write_filehandle,
+        [NFSD_Threads] = write_threads,
+        [NFSD_Leasetime] = write_leasetime,
+};
+
+static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
+{
+        ino_t ino =  file->f_dentry->d_inode->i_ino;
+        char *data;
+        ssize_t rv;
+
+        if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !write_op[ino])
+                return -EINVAL;
+
+        data = simple_transaction_get(file, buf, size);
+        if (IS_ERR(data))
+                return PTR_ERR(data);
+
+        rv =  write_op[ino](file, data, size);
+        if (rv>0) {
+                simple_transaction_set(file, rv);
+                rv = size;
+        }
+        return rv;
+}
+
+static struct file_operations transaction_ops = {
+        .write          = nfsctl_transaction_write,
+        .read           = simple_transaction_read,
+        .release        = simple_transaction_release,
+};
+
+extern struct seq_operations nfs_exports_op;
+static int exports_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &nfs_exports_op);
+}
+
+static struct file_operations exports_operations = {
+        .open           = exports_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+/*----------------------------------------------------------------------------*/
+/*
+ * payload - write methods
+ * If the method has a response, the response should be put in buf,
+ * and the length returned.  Otherwise return 0 or and -error.
+ */
+
+static ssize_t write_svc(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_svc *data;
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_svc*) buf;
+        return nfsd_svc(data->svc_port, data->svc_nthreads);
+}
+
+static ssize_t write_add(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_client *data;
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_client *)buf;
+        return exp_addclient(data);
+}
+
+static ssize_t write_del(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_client *data;
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_client *)buf;
+        return exp_delclient(data);
+}
+
+static ssize_t write_export(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_export *data;
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_export*)buf;
+        return exp_export(data);
+}
+
+static ssize_t write_unexport(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_export *data;
+
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_export*)buf;
+        return exp_unexport(data);
+}
+
+static ssize_t write_getfs(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_fsparm *data;
+        struct sockaddr_in *sin;
+        struct auth_domain *clp;
+        int err = 0;
+        struct knfsd_fh *res;
+
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_fsparm*)buf;
+        err = -EPROTONOSUPPORT;
+        if (data->gd_addr.sa_family != AF_INET)
+                goto out;
+        sin = (struct sockaddr_in *)&data->gd_addr;
+        if (data->gd_maxlen > NFS3_FHSIZE)
+                data->gd_maxlen = NFS3_FHSIZE;
+
+        res = (struct knfsd_fh*)buf;
+
+        exp_readlock();
+        if (!(clp = auth_unix_lookup(sin->sin_addr)))
+                err = -EPERM;
+        else {
+                err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
+                auth_domain_put(clp);
+        }
+        exp_readunlock();
+        if (err == 0)
+                err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
+ out:
+        return err;
+}
+
+static ssize_t write_getfd(struct file *file, char *buf, size_t size)
+{
+        struct nfsctl_fdparm *data;
+        struct sockaddr_in *sin;
+        struct auth_domain *clp;
+        int err = 0;
+        struct knfsd_fh fh;
+        char *res;
+
+        if (size < sizeof(*data))
+                return -EINVAL;
+        data = (struct nfsctl_fdparm*)buf;
+        err = -EPROTONOSUPPORT;
+        if (data->gd_addr.sa_family != AF_INET)
+                goto out;
+        err = -EINVAL;
+        if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
+                goto out;
+
+        res = buf;
+        sin = (struct sockaddr_in *)&data->gd_addr;
+        exp_readlock();
+        if (!(clp = auth_unix_lookup(sin->sin_addr)))
+                err = -EPERM;
+        else {
+                err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
+                auth_domain_put(clp);
+        }
+        exp_readunlock();
+
+        if (err == 0) {
+                memset(res,0, NFS_FHSIZE);
+                memcpy(res, &fh.fh_base, fh.fh_size);
+                err = NFS_FHSIZE;
+        }
+ out:
+        return err;
+}
+
+static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
+{
+        /* request is:
+         *   domain path maxsize
+         * response is
+         *   filehandle
+         *
+         * qword quoting is used, so filehandle will be \x....
+         */
+        char *dname, *path;
+        int maxsize;
+        char *mesg = buf;
+        int len;
+        struct auth_domain *dom;
+        struct knfsd_fh fh;
+
+        if (buf[size-1] != '\n')
+                return -EINVAL;
+        buf[size-1] = 0;
+
+        dname = mesg;
+        len = qword_get(&mesg, dname, size);
+        if (len <= 0) return -EINVAL;
+        
+        path = dname+len+1;
+        len = qword_get(&mesg, path, size);
+        if (len <= 0) return -EINVAL;
+
+        len = get_int(&mesg, &maxsize);
+        if (len)
+                return len;
+
+        if (maxsize < NFS_FHSIZE)
+                return -EINVAL;
+        if (maxsize > NFS3_FHSIZE)
+                maxsize = NFS3_FHSIZE;
+
+        if (qword_get(&mesg, mesg, size)>0)
+                return -EINVAL;
+
+        /* we have all the words, they are in buf.. */
+        dom = unix_domain_find(dname);
+        if (!dom)
+                return -ENOMEM;
+
+        len = exp_rootfh(dom, path, &fh,  maxsize);
+        auth_domain_put(dom);
+        if (len)
+                return len;
+        
+        mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
+        qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
+        mesg[-1] = '\n';
+        return mesg - buf;      
+}
+
+extern int nfsd_nrthreads(void);
+
+static ssize_t write_threads(struct file *file, char *buf, size_t size)
+{
+        /* if size > 0, look for a number of threads and call nfsd_svc
+         * then write out number of threads as reply
+         */
+        char *mesg = buf;
+        int rv;
+        if (size > 0) {
+                int newthreads;
+                rv = get_int(&mesg, &newthreads);
+                if (rv)
+                        return rv;
+                if (newthreads <0)
+                        return -EINVAL;
+                rv = nfsd_svc(2049, newthreads);
+                if (rv)
+                        return rv;
+        }
+        sprintf(buf, "%d\n", nfsd_nrthreads());
+        return strlen(buf);
+}
+
+extern time_t nfs4_leasetime(void);
+
+static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
+{
+        /* if size > 10 seconds, call
+         * nfs4_reset_lease() then write out the new lease (seconds) as reply
+         */
+        char *mesg = buf;
+        int rv;
+
+        if (size > 0) {
+                int lease;
+                rv = get_int(&mesg, &lease);
+                if (rv)
+                        return rv;
+                if (lease < 10 || lease > 3600)
+                        return -EINVAL;
+                nfs4_reset_lease(lease);
+        }
+        sprintf(buf, "%ld\n", nfs4_lease_time());
+        return strlen(buf);
+}
+
+/*----------------------------------------------------------------------------*/
+/*
+ *      populating the filesystem.
+ */
+
+static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
+{
+        static struct tree_descr nfsd_files[] = {
+                [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
+                [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
+                [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
+                [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
+                [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
+                [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
+                [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
+                [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
+                [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
+                [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
+#ifdef CONFIG_NFSD_V4
+                [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
+#endif
+                /* last one */ {""}
+        };
+        return simple_fill_super(sb, 0x6e667364, nfsd_files);
+}
+
+static struct super_block *nfsd_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
+{
+        return get_sb_single(fs_type, flags, data, nfsd_fill_super);
+}
+
+static struct file_system_type nfsd_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "nfsd",
+        .get_sb         = nfsd_get_sb,
+        .kill_sb        = kill_litter_super,
+};
+
+static int __init init_nfsd(void)
+{
+        int retval;
+        printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
+
+        nfsd_stat_init();       /* Statistics */
+        nfsd_cache_init();      /* RPC reply cache */
+        nfsd_export_init();     /* Exports table */
+        nfsd_lockd_init();      /* lockd->nfsd callbacks */
+#ifdef CONFIG_NFSD_V4
+        nfsd_idmap_init();      /* Name to ID mapping */
+#endif /* CONFIG_NFSD_V4 */
+        if (proc_mkdir("fs/nfs", NULL)) {
+                struct proc_dir_entry *entry;
+                entry = create_proc_entry("fs/nfs/exports", 0, NULL);
+                if (entry)
+                        entry->proc_fops =  &exports_operations;
+        }
+        retval = register_filesystem(&nfsd_fs_type);
+        if (retval) {
+                nfsd_export_shutdown();
+                nfsd_cache_shutdown();
+                remove_proc_entry("fs/nfs/exports", NULL);
+                remove_proc_entry("fs/nfs", NULL);
+                nfsd_stat_shutdown();
+                nfsd_lockd_shutdown();
+        }
+        return retval;
+}
+
+static void __exit exit_nfsd(void)
+{
+        nfsd_export_shutdown();
+        nfsd_cache_shutdown();
+        remove_proc_entry("fs/nfs/exports", NULL);
+        remove_proc_entry("fs/nfs", NULL);
+        nfsd_stat_shutdown();
+        nfsd_lockd_shutdown();
+#ifdef CONFIG_NFSD_V4
+        nfsd_idmap_shutdown();
+#endif /* CONFIG_NFSD_V4 */
+        unregister_filesystem(&nfsd_fs_type);
+}
+
+MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
+MODULE_LICENSE("GPL");
+module_init(init_nfsd)
+module_exit(exit_nfsd)