diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfsd/nfsctl.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfsd/nfsctl.c | 1218 |
1 files changed, 0 insertions, 1218 deletions
diff --git a/ANDROID_3.4.5/fs/nfsd/nfsctl.c b/ANDROID_3.4.5/fs/nfsd/nfsctl.c deleted file mode 100644 index 3ab12eb2..00000000 --- a/ANDROID_3.4.5/fs/nfsd/nfsctl.c +++ /dev/null @@ -1,1218 +0,0 @@ -/* - * Syscall interface to knfsd. - * - * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> - */ - -#include <linux/slab.h> -#include <linux/namei.h> -#include <linux/ctype.h> - -#include <linux/sunrpc/svcsock.h> -#include <linux/lockd/lockd.h> -#include <linux/sunrpc/clnt.h> -#include <linux/sunrpc/gss_api.h> -#include <linux/sunrpc/gss_krb5_enctypes.h> -#include <linux/sunrpc/rpc_pipe_fs.h> -#include <linux/module.h> - -#include "idmap.h" -#include "nfsd.h" -#include "cache.h" -#include "fault_inject.h" -#include "netns.h" - -/* - * We have a single directory with several nodes in it. - */ -enum { - NFSD_Root = 1, - NFSD_List, - NFSD_Export_features, - NFSD_Fh, - NFSD_FO_UnlockIP, - NFSD_FO_UnlockFS, - NFSD_Threads, - NFSD_Pool_Threads, - NFSD_Pool_Stats, - NFSD_Versions, - NFSD_Ports, - NFSD_MaxBlkSize, - NFSD_SupportedEnctypes, - /* - * 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_Gracetime, - NFSD_RecoveryDir, -#endif -}; - -/* - * write() for these nodes. - */ -static ssize_t write_filehandle(struct file *file, char *buf, size_t size); -static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); -static ssize_t write_unlock_fs(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_gracetime(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 (*write_op[])(struct file *, char *, size_t) = { - [NFSD_Fh] = write_filehandle, - [NFSD_FO_UnlockIP] = write_unlock_ip, - [NFSD_FO_UnlockFS] = write_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_Gracetime] = write_gracetime, - [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, - .llseek = default_llseek, -}; - -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, -}; - -static int export_features_show(struct seq_file *m, void *v) -{ - seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); - return 0; -} - -static int export_features_open(struct inode *inode, struct file *file) -{ - return single_open(file, export_features_show, NULL); -} - -static struct file_operations export_features_operations = { - .open = export_features_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) -static int supported_enctypes_show(struct seq_file *m, void *v) -{ - seq_printf(m, KRB5_SUPPORTED_ENCTYPES); - return 0; -} - -static int supported_enctypes_open(struct inode *inode, struct file *file) -{ - return single_open(file, supported_enctypes_show, NULL); -} - -static struct file_operations supported_enctypes_ops = { - .open = supported_enctypes_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; -#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ - -extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); -extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); - -static const struct file_operations pool_stats_operations = { - .open = nfsd_pool_stats_open, - .read = seq_read, - .llseek = seq_lseek, - .release = nfsd_pool_stats_release, - .owner = THIS_MODULE, -}; - -/*----------------------------------------------------------------------------*/ -/* - * payload - write methods - */ - - -/** - * write_unlock_ip - Release all locks used by a client - * - * Experimental. - * - * Input: - * buf: '\n'-terminated C string containing a - * presentation format IP address - * size: length of C string in @buf - * Output: - * On success: returns zero if all specified locks were released; - * returns one if one or more locks were not released - * On error: return code is negative errno value - */ -static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) -{ - struct sockaddr_storage address; - struct sockaddr *sap = (struct sockaddr *)&address; - size_t salen = sizeof(address); - char *fo_path; - - /* 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; - - if (rpc_pton(&init_net, fo_path, size, sap, salen) == 0) - return -EINVAL; - - return nlmsvc_unlock_all_by_ip(sap); -} - -/** - * write_unlock_fs - Release all locks on a local file system - * - * Experimental. - * - * Input: - * buf: '\n'-terminated C string containing the - * absolute pathname of a local file system - * size: length of C string in @buf - * Output: - * On success: returns zero if all specified locks were released; - * returns one if one or more locks were not released - * On error: return code is negative errno value - */ -static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) -{ - struct path path; - 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 = kern_path(fo_path, 0, &path); - if (error) - return error; - - /* - * XXX: Needs better sanity checking. Otherwise we could end up - * releasing locks on the wrong file system. - * - * For example: - * 1. Does the path refer to a directory? - * 2. Is that directory a mount point, or - * 3. Is that directory the root of an exported file system? - */ - error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); - - path_put(&path); - return error; -} - -/** - * write_filehandle - Get a variable-length NFS file handle by path - * - * On input, the buffer contains a '\n'-terminated C string comprised of - * three alphanumeric words separated by whitespace. The string may - * contain escape sequences. - * - * Input: - * buf: - * domain: client domain name - * path: export pathname - * maxsize: numeric maximum size of - * @buf - * size: length of C string in @buf - * Output: - * On success: passed-in buffer filled with '\n'-terminated C - * string containing a ASCII hex text version - * of the NFS file handle; - * return code is the size in bytes of the string - * On error: return code is negative errno value - */ -static ssize_t write_filehandle(struct file *file, char *buf, size_t size) -{ - 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; -} - -/** - * write_threads - Start NFSD, or report the current number of running threads - * - * Input: - * buf: ignored - * size: zero - * Output: - * On success: passed-in buffer filled with '\n'-terminated C - * string numeric value representing the number of - * running NFSD threads; - * return code is the size in bytes of the string - * On error: return code is zero - * - * OR - * - * Input: - * buf: C string containing an unsigned - * integer value representing the - * number of NFSD threads to start - * size: non-zero length of C string in @buf - * Output: - * On success: NFS service is started; - * passed-in buffer filled with '\n'-terminated C - * string numeric value representing the number of - * running NFSD threads; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -static ssize_t write_threads(struct file *file, char *buf, size_t size) -{ - 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(NFS_PORT, newthreads); - if (rv < 0) - return rv; - } else - rv = nfsd_nrthreads(); - - return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); -} - -/** - * write_pool_threads - Set or report the current number of threads per pool - * - * Input: - * buf: ignored - * size: zero - * - * OR - * - * Input: - * buf: C string containing whitespace- - * separated unsigned integer values - * representing the number of NFSD - * threads to start in each pool - * size: non-zero length of C string in @buf - * Output: - * On success: passed-in buffer filled with '\n'-terminated C - * string containing integer values representing the - * number of NFSD threads in each pool; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -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; - } - rv = 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) -{ - char *mesg = buf; - char *vers, *minorp, sign; - int len, num, remaining; - unsigned minor; - 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), &minorp, 0); - else - num = simple_strtol(vers, &minorp, 0); - if (*minorp == '.') { - if (num < 4) - return -EINVAL; - minor = simple_strtoul(minorp+1, NULL, 0); - if (minor == 0) - return -EINVAL; - if (nfsd_minorversion(minor, sign == '-' ? - NFSD_CLEAR : NFSD_SET) < 0) - return -EINVAL; - goto next; - } - switch(num) { - case 2: - case 3: - case 4: - nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); - break; - default: - return -EINVAL; - } - next: - vers += len + 1; - } 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 = ""; - remaining = SIMPLE_TRANSACTION_LIMIT; - for (num=2 ; num <= 4 ; num++) - if (nfsd_vers(num, NFSD_AVAIL)) { - len = snprintf(buf, remaining, "%s%c%d", sep, - nfsd_vers(num, NFSD_TEST)?'+':'-', - num); - sep = " "; - - if (len > remaining) - break; - remaining -= len; - buf += len; - tlen += len; - } - if (nfsd_vers(4, NFSD_AVAIL)) - for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; - minor++) { - len = snprintf(buf, remaining, " %c4.%u", - (nfsd_vers(4, NFSD_TEST) && - nfsd_minorversion(minor, NFSD_TEST)) ? - '+' : '-', - minor); - - if (len > remaining) - break; - remaining -= len; - buf += len; - tlen += len; - } - - len = snprintf(buf, remaining, "\n"); - if (len > remaining) - return -EINVAL; - return tlen + len; -} - -/** - * write_versions - Set or report the available NFS protocol versions - * - * Input: - * buf: ignored - * size: zero - * Output: - * On success: passed-in buffer filled with '\n'-terminated C - * string containing positive or negative integer - * values representing the current status of each - * protocol version; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - * - * OR - * - * Input: - * buf: C string containing whitespace- - * separated positive or negative - * integer values representing NFS - * protocol versions to enable ("+n") - * or disable ("-n") - * size: non-zero length of C string in @buf - * Output: - * On success: status of zero or more protocol versions has - * been updated; passed-in buffer filled with - * '\n'-terminated C string containing positive - * or negative integer values representing the - * current status of each protocol version; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -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; -} - -/* - * Zero-length write. Return a list of NFSD's current listener - * transports. - */ -static ssize_t __write_ports_names(char *buf) -{ - if (nfsd_serv == NULL) - return 0; - return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); -} - -/* - * A single 'fd' number was written, in which case it must be for - * a socket of a supported family/protocol, and we use it as an - * nfsd listener. - */ -static ssize_t __write_ports_addfd(char *buf) -{ - char *mesg = buf; - int fd, err; - struct net *net = &init_net; - - err = get_int(&mesg, &fd); - if (err != 0 || fd < 0) - return -EINVAL; - - err = nfsd_create_serv(); - if (err != 0) - return err; - - err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); - if (err < 0) { - if (nfsd_serv->sv_nrthreads == 1) - svc_shutdown_net(nfsd_serv, net); - svc_destroy(nfsd_serv); - return err; - } - - /* Decrease the count, but don't shut down the service */ - nfsd_serv->sv_nrthreads--; - return err; -} - -/* - * A '-' followed by the 'name' of a socket means we close the socket. - */ -static ssize_t __write_ports_delfd(char *buf) -{ - char *toclose; - int len = 0; - - toclose = kstrdup(buf + 1, GFP_KERNEL); - if (toclose == NULL) - return -ENOMEM; - - if (nfsd_serv != NULL) - len = svc_sock_names(nfsd_serv, buf, - SIMPLE_TRANSACTION_LIMIT, toclose); - kfree(toclose); - return len; -} - -/* - * A transport listener is added by writing it's transport name and - * a port number. - */ -static ssize_t __write_ports_addxprt(char *buf) -{ - char transport[16]; - struct svc_xprt *xprt; - int port, err; - struct net *net = &init_net; - - if (sscanf(buf, "%15s %4u", transport, &port) != 2) - return -EINVAL; - - if (port < 1 || port > USHRT_MAX) - return -EINVAL; - - err = nfsd_create_serv(); - if (err != 0) - return err; - - err = svc_create_xprt(nfsd_serv, transport, net, - PF_INET, port, SVC_SOCK_ANONYMOUS); - if (err < 0) - goto out_err; - - err = svc_create_xprt(nfsd_serv, transport, net, - PF_INET6, port, SVC_SOCK_ANONYMOUS); - if (err < 0 && err != -EAFNOSUPPORT) - goto out_close; - - /* Decrease the count, but don't shut down the service */ - nfsd_serv->sv_nrthreads--; - return 0; -out_close: - xprt = svc_find_xprt(nfsd_serv, transport, net, PF_INET, port); - if (xprt != NULL) { - svc_close_xprt(xprt); - svc_xprt_put(xprt); - } -out_err: - if (nfsd_serv->sv_nrthreads == 1) - svc_shutdown_net(nfsd_serv, net); - svc_destroy(nfsd_serv); - return err; -} - -/* - * A transport listener is removed by writing a "-", it's transport - * name, and it's port number. - */ -static ssize_t __write_ports_delxprt(char *buf) -{ - struct svc_xprt *xprt; - char transport[16]; - int port; - - if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) - return -EINVAL; - - if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) - return -EINVAL; - - xprt = svc_find_xprt(nfsd_serv, transport, &init_net, AF_UNSPEC, port); - if (xprt == NULL) - return -ENOTCONN; - - svc_close_xprt(xprt); - svc_xprt_put(xprt); - return 0; -} - -static ssize_t __write_ports(struct file *file, char *buf, size_t size) -{ - if (size == 0) - return __write_ports_names(buf); - - if (isdigit(buf[0])) - return __write_ports_addfd(buf); - - if (buf[0] == '-' && isdigit(buf[1])) - return __write_ports_delfd(buf); - - if (isalpha(buf[0])) - return __write_ports_addxprt(buf); - - if (buf[0] == '-' && isalpha(buf[1])) - return __write_ports_delxprt(buf); - - return -EINVAL; -} - -/** - * write_ports - Pass a socket file descriptor or transport name to listen on - * - * Input: - * buf: ignored - * size: zero - * Output: - * On success: passed-in buffer filled with a '\n'-terminated C - * string containing a whitespace-separated list of - * named NFSD listeners; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - * - * OR - * - * Input: - * buf: C string containing an unsigned - * integer value representing a bound - * but unconnected socket that is to be - * used as an NFSD listener; listen(3) - * must be called for a SOCK_STREAM - * socket, otherwise it is ignored - * size: non-zero length of C string in @buf - * Output: - * On success: NFS service is started; - * passed-in buffer filled with a '\n'-terminated C - * string containing a unique alphanumeric name of - * the listener; - * return code is the size in bytes of the string - * On error: return code is a negative errno value - * - * OR - * - * Input: - * buf: C string containing a "-" followed - * by an integer value representing a - * previously passed in socket file - * descriptor - * size: non-zero length of C string in @buf - * Output: - * On success: NFS service no longer listens on that socket; - * passed-in buffer filled with a '\n'-terminated C - * string containing a unique name of the listener; - * return code is the size in bytes of the string - * On error: return code is a negative errno value - * - * OR - * - * Input: - * buf: C string containing a transport - * name and an unsigned integer value - * representing the port to listen on, - * separated by whitespace - * size: non-zero length of C string in @buf - * Output: - * On success: returns zero; NFS service is started - * On error: return code is a negative errno value - * - * OR - * - * Input: - * buf: C string containing a "-" followed - * by a transport name and an unsigned - * integer value representing the port - * to listen on, separated by whitespace - * size: non-zero length of C string in @buf - * Output: - * On success: returns zero; NFS service no longer listens - * on that transport - * On error: return code is a negative errno value - */ -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; - -/** - * write_maxblksize - Set or report the current NFS blksize - * - * Input: - * buf: ignored - * size: zero - * - * OR - * - * Input: - * buf: C string containing an unsigned - * integer value representing the new - * NFS blksize - * size: non-zero length of C string in @buf - * Output: - * On success: passed-in buffer filled with '\n'-terminated C string - * containing numeric value of the current NFS blksize - * setting; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -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) { - mutex_unlock(&nfsd_mutex); - return -EBUSY; - } - nfsd_max_blksize = bsize; - mutex_unlock(&nfsd_mutex); - } - - return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", - nfsd_max_blksize); -} - -#ifdef CONFIG_NFSD_V4 -static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) -{ - char *mesg = buf; - int rv, i; - - if (size > 0) { - if (nfsd_serv) - return -EBUSY; - rv = get_int(&mesg, &i); - if (rv) - return rv; - /* - * Some sanity checking. We don't have a reason for - * these particular numbers, but problems with the - * extremes are: - * - Too short: the briefest network outage may - * cause clients to lose all their locks. Also, - * the frequent polling may be wasteful. - * - Too long: do you really want reboot recovery - * to take more than an hour? Or to make other - * clients wait an hour before being able to - * revoke a dead client's locks? - */ - if (i < 10 || i > 3600) - return -EINVAL; - *time = i; - } - - return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); -} - -static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) -{ - ssize_t rv; - - mutex_lock(&nfsd_mutex); - rv = __nfsd4_write_time(file, buf, size, time); - mutex_unlock(&nfsd_mutex); - return rv; -} - -/** - * write_leasetime - Set or report the current NFSv4 lease time - * - * Input: - * buf: ignored - * size: zero - * - * OR - * - * Input: - * buf: C string containing an unsigned - * integer value representing the new - * NFSv4 lease expiry time - * size: non-zero length of C string in @buf - * Output: - * On success: passed-in buffer filled with '\n'-terminated C - * string containing unsigned integer value of the - * current lease expiry time; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -static ssize_t write_leasetime(struct file *file, char *buf, size_t size) -{ - return nfsd4_write_time(file, buf, size, &nfsd4_lease); -} - -/** - * write_gracetime - Set or report current NFSv4 grace period time - * - * As above, but sets the time of the NFSv4 grace period. - * - * Note this should never be set to less than the *previous* - * lease-period time, but we don't try to enforce this. (In the common - * case (a new boot), we don't know what the previous lease time was - * anyway.) - */ -static ssize_t write_gracetime(struct file *file, char *buf, size_t size) -{ - return nfsd4_write_time(file, buf, size, &nfsd4_grace); -} - -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); - if (status) - return status; - } - - return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", - nfs4_recoverydir()); -} - -/** - * write_recoverydir - Set or report the pathname of the recovery directory - * - * Input: - * buf: ignored - * size: zero - * - * OR - * - * Input: - * buf: C string containing the pathname - * of the directory on a local file - * system containing permanent NFSv4 - * recovery data - * size: non-zero length of C string in @buf - * Output: - * On success: passed-in buffer filled with '\n'-terminated C string - * containing the current recovery pathname setting; - * return code is the size in bytes of the string - * On error: return code is zero or a negative errno value - */ -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_List] = {"exports", &exports_operations, S_IRUGO}, - [NFSD_Export_features] = {"export_features", - &export_features_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_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, - [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}, -#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) - [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, -#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ -#ifdef CONFIG_NFSD_V4 - [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, - [NFSD_Gracetime] = {"nfsv4gracetime", &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 struct dentry *nfsd_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) -{ - return mount_single(fs_type, flags, data, nfsd_fill_super); -} - -static struct file_system_type nfsd_fs_type = { - .owner = THIS_MODULE, - .name = "nfsd", - .mount = nfsd_mount, - .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 - -int nfsd_net_id; -static struct pernet_operations nfsd_net_ops = { - .id = &nfsd_net_id, - .size = sizeof(struct nfsd_net), -}; - -static int __init init_nfsd(void) -{ - int retval; - printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); - - retval = register_cld_notifier(); - if (retval) - return retval; - retval = register_pernet_subsys(&nfsd_net_ops); - if (retval < 0) - goto out_unregister_notifier; - retval = nfsd4_init_slabs(); - if (retval) - goto out_unregister_pernet; - nfs4_state_init(); - retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ - if (retval) - goto out_free_slabs; - 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(); - nfsd_fault_inject_cleanup(); -out_free_slabs: - nfsd4_free_slabs(); -out_unregister_pernet: - unregister_pernet_subsys(&nfsd_net_ops); -out_unregister_notifier: - unregister_cld_notifier(); - 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(); - nfsd_fault_inject_cleanup(); - unregister_filesystem(&nfsd_fs_type); - unregister_pernet_subsys(&nfsd_net_ops); - unregister_cld_notifier(); -} - -MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); -MODULE_LICENSE("GPL"); -module_init(init_nfsd) -module_exit(exit_nfsd) |