diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/nfsd/nfsctl.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
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!
Diffstat (limited to 'fs/nfsd/nfsctl.c')
-rw-r--r-- | fs/nfsd/nfsctl.c | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c new file mode 100644 index 0000000..161afdc --- /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) |