| /* |
| * linux/fs/nfsd/nfsctl.c |
| * |
| * Syscall interface to knfsd. |
| * |
| * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| */ |
| |
| #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/inet.h> |
| #include <linux/string.h> |
| #include <linux/smp_lock.h> |
| #include <linux/ctype.h> |
| |
| #include <linux/nfs.h> |
| #include <linux/nfsd_idmap.h> |
| #include <linux/lockd/bind.h> |
| #include <linux/sunrpc/svc.h> |
| #include <linux/sunrpc/svcsock.h> |
| #include <linux/nfsd/nfsd.h> |
| #include <linux/nfsd/cache.h> |
| #include <linux/nfsd/xdr.h> |
| #include <linux/nfsd/syscall.h> |
| #include <linux/lockd/lockd.h> |
| |
| #include <asm/uaccess.h> |
| #include <net/ipv6.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_FO_UnlockIP, |
| NFSD_FO_UnlockFS, |
| NFSD_Threads, |
| NFSD_Pool_Threads, |
| NFSD_Versions, |
| NFSD_Ports, |
| NFSD_MaxBlkSize, |
| /* |
| * The below MUST come last. Otherwise we leave a hole in nfsd_files[] |
| * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops |
| */ |
| #ifdef CONFIG_NFSD_V4 |
| NFSD_Leasetime, |
| NFSD_RecoveryDir, |
| #endif |
| }; |
| |
| /* |
| * 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_pool_threads(struct file *file, char *buf, size_t size); |
| static ssize_t write_versions(struct file *file, char *buf, size_t size); |
| static ssize_t write_ports(struct file *file, char *buf, size_t size); |
| static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
| #ifdef CONFIG_NFSD_V4 |
| static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
| static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
| #endif |
| |
| static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size); |
| static ssize_t failover_unlock_fs(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_FO_UnlockIP] = failover_unlock_ip, |
| [NFSD_FO_UnlockFS] = failover_unlock_fs, |
| [NFSD_Threads] = write_threads, |
| [NFSD_Pool_Threads] = write_pool_threads, |
| [NFSD_Versions] = write_versions, |
| [NFSD_Ports] = write_ports, |
| [NFSD_MaxBlkSize] = write_maxblksize, |
| #ifdef CONFIG_NFSD_V4 |
| [NFSD_Leasetime] = write_leasetime, |
| [NFSD_RecoveryDir] = write_recoverydir, |
| #endif |
| }; |
| |
| static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
| { |
| ino_t ino = file->f_path.dentry->d_inode->i_ino; |
| char *data; |
| ssize_t rv; |
| |
| if (ino >= ARRAY_SIZE(write_op) || !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 ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
| { |
| if (! file->private_data) { |
| /* An attempt to read a transaction file without writing |
| * causes a 0-byte write so that the file can return |
| * state information |
| */ |
| ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); |
| if (rv < 0) |
| return rv; |
| } |
| return simple_transaction_read(file, buf, size, pos); |
| } |
| |
| static const struct file_operations transaction_ops = { |
| .write = nfsctl_transaction_write, |
| .read = nfsctl_transaction_read, |
| .release = simple_transaction_release, |
| }; |
| |
| static int exports_open(struct inode *inode, struct file *file) |
| { |
| return seq_open(file, &nfs_exports_op); |
| } |
| |
| static const struct file_operations exports_operations = { |
| .open = exports_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release, |
| .owner = THIS_MODULE, |
| }; |
| |
| /*----------------------------------------------------------------------------*/ |
| /* |
| * 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; |
| struct in6_addr in6; |
| |
| 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(); |
| |
| ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); |
| |
| clp = auth_unix_lookup(&in6); |
| if (!clp) |
| 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 + offsetof(struct knfsd_fh, 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; |
| struct in6_addr in6; |
| |
| 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(); |
| |
| ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); |
| |
| clp = auth_unix_lookup(&in6); |
| if (!clp) |
| 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 failover_unlock_ip(struct file *file, char *buf, size_t size) |
| { |
| __be32 server_ip; |
| char *fo_path, c; |
| int b1, b2, b3, b4; |
| |
| /* sanity check */ |
| if (size == 0) |
| return -EINVAL; |
| |
| if (buf[size-1] != '\n') |
| return -EINVAL; |
| |
| fo_path = buf; |
| if (qword_get(&buf, fo_path, size) < 0) |
| return -EINVAL; |
| |
| /* get ipv4 address */ |
| if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) |
| return -EINVAL; |
| server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4); |
| |
| return nlmsvc_unlock_all_by_ip(server_ip); |
| } |
| |
| static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size) |
| { |
| struct nameidata nd; |
| char *fo_path; |
| int error; |
| |
| /* sanity check */ |
| if (size == 0) |
| return -EINVAL; |
| |
| if (buf[size-1] != '\n') |
| return -EINVAL; |
| |
| fo_path = buf; |
| if (qword_get(&buf, fo_path, size) < 0) |
| return -EINVAL; |
| |
| error = path_lookup(fo_path, 0, &nd); |
| if (error) |
| return error; |
| |
| error = nlmsvc_unlock_all_by_sb(nd.path.mnt->mnt_sb); |
| |
| path_put(&nd.path); |
| return error; |
| } |
| |
| 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 uninitialized_var(maxsize); |
| char *mesg = buf; |
| int len; |
| struct auth_domain *dom; |
| struct knfsd_fh fh; |
| |
| if (size == 0) |
| return -EINVAL; |
| |
| 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; |
| } |
| |
| 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); |
| } |
| |
| static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
| { |
| /* if size > 0, look for an array of number of threads per node |
| * and apply them then write out number of threads per node as reply |
| */ |
| char *mesg = buf; |
| int i; |
| int rv; |
| int len; |
| int npools; |
| int *nthreads; |
| |
| mutex_lock(&nfsd_mutex); |
| npools = nfsd_nrpools(); |
| if (npools == 0) { |
| /* |
| * NFS is shut down. The admin can start it by |
| * writing to the threads file but NOT the pool_threads |
| * file, sorry. Report zero threads. |
| */ |
| mutex_unlock(&nfsd_mutex); |
| strcpy(buf, "0\n"); |
| return strlen(buf); |
| } |
| |
| nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); |
| rv = -ENOMEM; |
| if (nthreads == NULL) |
| goto out_free; |
| |
| if (size > 0) { |
| for (i = 0; i < npools; i++) { |
| rv = get_int(&mesg, &nthreads[i]); |
| if (rv == -ENOENT) |
| break; /* fewer numbers than pools */ |
| if (rv) |
| goto out_free; /* syntax error */ |
| rv = -EINVAL; |
| if (nthreads[i] < 0) |
| goto out_free; |
| } |
| rv = nfsd_set_nrthreads(i, nthreads); |
| if (rv) |
| goto out_free; |
| } |
| |
| rv = nfsd_get_nrthreads(npools, nthreads); |
| if (rv) |
| goto out_free; |
| |
| mesg = buf; |
| size = SIMPLE_TRANSACTION_LIMIT; |
| for (i = 0; i < npools && size > 0; i++) { |
| snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); |
| len = strlen(mesg); |
| size -= len; |
| mesg += len; |
| } |
| |
| mutex_unlock(&nfsd_mutex); |
| return (mesg-buf); |
| |
| out_free: |
| kfree(nthreads); |
| mutex_unlock(&nfsd_mutex); |
| return rv; |
| } |
| |
| static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
| { |
| /* |
| * Format: |
| * [-/+]vers [-/+]vers ... |
| */ |
| char *mesg = buf; |
| char *vers, sign; |
| int len, num; |
| ssize_t tlen = 0; |
| char *sep; |
| |
| if (size>0) { |
| if (nfsd_serv) |
| /* Cannot change versions without updating |
| * nfsd_serv->sv_xdrsize, and reallocing |
| * rq_argp and rq_resp |
| */ |
| return -EBUSY; |
| if (buf[size-1] != '\n') |
| return -EINVAL; |
| buf[size-1] = 0; |
| |
| vers = mesg; |
| len = qword_get(&mesg, vers, size); |
| if (len <= 0) return -EINVAL; |
| do { |
| sign = *vers; |
| if (sign == '+' || sign == '-') |
| num = simple_strtol((vers+1), NULL, 0); |
| else |
| num = simple_strtol(vers, NULL, 0); |
| switch(num) { |
| case 2: |
| case 3: |
| case 4: |
| nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
| break; |
| default: |
| return -EINVAL; |
| } |
| vers += len + 1; |
| tlen += len; |
| } while ((len = qword_get(&mesg, vers, size)) > 0); |
| /* If all get turned off, turn them back on, as |
| * having no versions is BAD |
| */ |
| nfsd_reset_versions(); |
| } |
| /* Now write current state into reply buffer */ |
| len = 0; |
| sep = ""; |
| for (num=2 ; num <= 4 ; num++) |
| if (nfsd_vers(num, NFSD_AVAIL)) { |
| len += sprintf(buf+len, "%s%c%d", sep, |
| nfsd_vers(num, NFSD_TEST)?'+':'-', |
| num); |
| sep = " "; |
| } |
| len += sprintf(buf+len, "\n"); |
| return len; |
| } |
| |
| static ssize_t write_versions(struct file *file, char *buf, size_t size) |
| { |
| ssize_t rv; |
| |
| mutex_lock(&nfsd_mutex); |
| rv = __write_versions(file, buf, size); |
| mutex_unlock(&nfsd_mutex); |
| return rv; |
| } |
| |
| static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
| { |
| if (size == 0) { |
| int len = 0; |
| |
| if (nfsd_serv) |
| len = svc_xprt_names(nfsd_serv, buf, 0); |
| return len; |
| } |
| /* Either a single 'fd' number is written, in which |
| * case it must be for a socket of a supported family/protocol, |
| * and we use it as an nfsd socket, or |
| * A '-' followed by the 'name' of a socket in which case |
| * we close the socket. |
| */ |
| if (isdigit(buf[0])) { |
| char *mesg = buf; |
| int fd; |
| int err; |
| err = get_int(&mesg, &fd); |
| if (err) |
| return -EINVAL; |
| if (fd < 0) |
| return -EINVAL; |
| err = nfsd_create_serv(); |
| if (!err) { |
| int proto = 0; |
| err = svc_addsock(nfsd_serv, fd, buf, &proto); |
| if (err >= 0) { |
| err = lockd_up(proto); |
| if (err < 0) |
| svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); |
| } |
| /* Decrease the count, but don't shutdown the |
| * the service |
| */ |
| nfsd_serv->sv_nrthreads--; |
| } |
| return err < 0 ? err : 0; |
| } |
| if (buf[0] == '-' && isdigit(buf[1])) { |
| char *toclose = kstrdup(buf+1, GFP_KERNEL); |
| int len = 0; |
| if (!toclose) |
| return -ENOMEM; |
| if (nfsd_serv) |
| len = svc_sock_names(buf, nfsd_serv, toclose); |
| if (len >= 0) |
| lockd_down(); |
| kfree(toclose); |
| return len; |
| } |
| /* |
| * Add a transport listener by writing it's transport name |
| */ |
| if (isalpha(buf[0])) { |
| int err; |
| char transport[16]; |
| int port; |
| if (sscanf(buf, "%15s %4d", transport, &port) == 2) { |
| err = nfsd_create_serv(); |
| if (!err) { |
| err = svc_create_xprt(nfsd_serv, |
| transport, port, |
| SVC_SOCK_ANONYMOUS); |
| if (err == -ENOENT) |
| /* Give a reasonable perror msg for |
| * bad transport string */ |
| err = -EPROTONOSUPPORT; |
| } |
| return err < 0 ? err : 0; |
| } |
| } |
| /* |
| * Remove a transport by writing it's transport name and port number |
| */ |
| if (buf[0] == '-' && isalpha(buf[1])) { |
| struct svc_xprt *xprt; |
| int err = -EINVAL; |
| char transport[16]; |
| int port; |
| if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { |
| if (port == 0) |
| return -EINVAL; |
| if (nfsd_serv) { |
| xprt = svc_find_xprt(nfsd_serv, transport, |
| AF_UNSPEC, port); |
| if (xprt) { |
| svc_close_xprt(xprt); |
| svc_xprt_put(xprt); |
| err = 0; |
| } else |
| err = -ENOTCONN; |
| } |
| return err < 0 ? err : 0; |
| } |
| } |
| return -EINVAL; |
| } |
| |
| static ssize_t write_ports(struct file *file, char *buf, size_t size) |
| { |
| ssize_t rv; |
| |
| mutex_lock(&nfsd_mutex); |
| rv = __write_ports(file, buf, size); |
| mutex_unlock(&nfsd_mutex); |
| return rv; |
| } |
| |
| |
| int nfsd_max_blksize; |
| |
| static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
| { |
| char *mesg = buf; |
| if (size > 0) { |
| int bsize; |
| int rv = get_int(&mesg, &bsize); |
| if (rv) |
| return rv; |
| /* force bsize into allowed range and |
| * required alignment. |
| */ |
| if (bsize < 1024) |
| bsize = 1024; |
| if (bsize > NFSSVC_MAXBLKSIZE) |
| bsize = NFSSVC_MAXBLKSIZE; |
| bsize &= ~(1024-1); |
| mutex_lock(&nfsd_mutex); |
| if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
| mutex_unlock(&nfsd_mutex); |
| return -EBUSY; |
| } |
| nfsd_max_blksize = bsize; |
| mutex_unlock(&nfsd_mutex); |
| } |
| return sprintf(buf, "%d\n", nfsd_max_blksize); |
| } |
| |
| #ifdef CONFIG_NFSD_V4 |
| 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, lease; |
| |
| if (size > 0) { |
| if (nfsd_serv) |
| return -EBUSY; |
| 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); |
| } |
| |
| static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
| { |
| ssize_t rv; |
| |
| mutex_lock(&nfsd_mutex); |
| rv = __write_leasetime(file, buf, size); |
| mutex_unlock(&nfsd_mutex); |
| return rv; |
| } |
| |
| extern char *nfs4_recoverydir(void); |
| |
| static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) |
| { |
| char *mesg = buf; |
| char *recdir; |
| int len, status; |
| |
| if (size > 0) { |
| if (nfsd_serv) |
| return -EBUSY; |
| if (size > PATH_MAX || buf[size-1] != '\n') |
| return -EINVAL; |
| buf[size-1] = 0; |
| |
| recdir = mesg; |
| len = qword_get(&mesg, recdir, size); |
| if (len <= 0) |
| return -EINVAL; |
| |
| status = nfs4_reset_recoverydir(recdir); |
| } |
| sprintf(buf, "%s\n", nfs4_recoverydir()); |
| return strlen(buf); |
| } |
| |
| static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
| { |
| ssize_t rv; |
| |
| mutex_lock(&nfsd_mutex); |
| rv = __write_recoverydir(file, buf, size); |
| mutex_unlock(&nfsd_mutex); |
| return rv; |
| } |
| |
| #endif |
| |
| /*----------------------------------------------------------------------------*/ |
| /* |
| * 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_FO_UnlockIP] = {"unlock_ip", |
| &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
| &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
| [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
| #ifdef CONFIG_NFSD_V4 |
| [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
| [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
| #endif |
| /* last one */ {""} |
| }; |
| return simple_fill_super(sb, 0x6e667364, nfsd_files); |
| } |
| |
| static int nfsd_get_sb(struct file_system_type *fs_type, |
| int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
| { |
| return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
| } |
| |
| static struct file_system_type nfsd_fs_type = { |
| .owner = THIS_MODULE, |
| .name = "nfsd", |
| .get_sb = nfsd_get_sb, |
| .kill_sb = kill_litter_super, |
| }; |
| |
| #ifdef CONFIG_PROC_FS |
| static int create_proc_exports_entry(void) |
| { |
| struct proc_dir_entry *entry; |
| |
| entry = proc_mkdir("fs/nfs", NULL); |
| if (!entry) |
| return -ENOMEM; |
| entry = proc_create("exports", 0, entry, &exports_operations); |
| if (!entry) |
| return -ENOMEM; |
| return 0; |
| } |
| #else /* CONFIG_PROC_FS */ |
| static int create_proc_exports_entry(void) |
| { |
| return 0; |
| } |
| #endif |
| |
| static int __init init_nfsd(void) |
| { |
| int retval; |
| printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); |
| |
| retval = nfs4_state_init(); /* nfs4 locking state */ |
| if (retval) |
| return retval; |
| nfsd_stat_init(); /* Statistics */ |
| retval = nfsd_reply_cache_init(); |
| if (retval) |
| goto out_free_stat; |
| retval = nfsd_export_init(); |
| if (retval) |
| goto out_free_cache; |
| nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
| retval = nfsd_idmap_init(); |
| if (retval) |
| goto out_free_lockd; |
| retval = create_proc_exports_entry(); |
| if (retval) |
| goto out_free_idmap; |
| retval = register_filesystem(&nfsd_fs_type); |
| if (retval) |
| goto out_free_all; |
| return 0; |
| out_free_all: |
| remove_proc_entry("fs/nfs/exports", NULL); |
| remove_proc_entry("fs/nfs", NULL); |
| out_free_idmap: |
| nfsd_idmap_shutdown(); |
| out_free_lockd: |
| nfsd_lockd_shutdown(); |
| nfsd_export_shutdown(); |
| out_free_cache: |
| nfsd_reply_cache_shutdown(); |
| out_free_stat: |
| nfsd_stat_shutdown(); |
| nfsd4_free_slabs(); |
| return retval; |
| } |
| |
| static void __exit exit_nfsd(void) |
| { |
| nfsd_export_shutdown(); |
| nfsd_reply_cache_shutdown(); |
| remove_proc_entry("fs/nfs/exports", NULL); |
| remove_proc_entry("fs/nfs", NULL); |
| nfsd_stat_shutdown(); |
| nfsd_lockd_shutdown(); |
| nfsd_idmap_shutdown(); |
| nfsd4_free_slabs(); |
| unregister_filesystem(&nfsd_fs_type); |
| } |
| |
| MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| MODULE_LICENSE("GPL"); |
| module_init(init_nfsd) |
| module_exit(exit_nfsd) |