| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Lorenzo Bianconi | 2867 | 30.06% | 6 | 2.67% |
| Neil Brown | 1467 | 15.38% | 36 | 16.00% |
| J. Bruce Fields | 958 | 10.04% | 27 | 12.00% |
| Chuck Lever | 788 | 8.26% | 28 | 12.44% |
| Al Viro | 767 | 8.04% | 10 | 4.44% |
| Jeff Layton | 674 | 7.07% | 20 | 8.89% |
| Stanislav Kinsbursky | 460 | 4.82% | 19 | 8.44% |
| Greg Banks | 290 | 3.04% | 2 | 0.89% |
| Linus Torvalds (pre-git) | 248 | 2.60% | 8 | 3.56% |
| Trond Myklebust | 238 | 2.50% | 7 | 3.11% |
| S. Wendy Cheng | 178 | 1.87% | 2 | 0.89% |
| David Howells | 95 | 1.00% | 1 | 0.44% |
| Eric Biggers | 76 | 0.80% | 2 | 0.89% |
| Tom Rix | 56 | 0.59% | 1 | 0.44% |
| Benny Halevy | 53 | 0.56% | 1 | 0.44% |
| Tom Tucker | 34 | 0.36% | 4 | 1.78% |
| Josef Whiter | 33 | 0.35% | 3 | 1.33% |
| ZhangXiaoxu | 21 | 0.22% | 2 | 0.89% |
| Randy Dunlap | 20 | 0.21% | 1 | 0.44% |
| Alexander Sverdlin | 19 | 0.20% | 1 | 0.44% |
| Kinglong Mee | 19 | 0.20% | 1 | 0.44% |
| James Morris | 18 | 0.19% | 1 | 0.44% |
| Christoph Hellwig | 17 | 0.18% | 2 | 0.89% |
| Amir Goldstein | 16 | 0.17% | 2 | 0.89% |
| ChenXiaoSong | 16 | 0.17% | 3 | 1.33% |
| Dai Ngo | 12 | 0.13% | 2 | 0.89% |
| Anna Schumaker | 12 | 0.13% | 2 | 0.89% |
| Kefeng Wang | 10 | 0.10% | 1 | 0.44% |
| Arnd Bergmann | 8 | 0.08% | 2 | 0.89% |
| Eric W. Biedermann | 8 | 0.08% | 2 | 0.89% |
| Andi Kleen | 7 | 0.07% | 1 | 0.44% |
| Tetsuo Handa | 5 | 0.05% | 1 | 0.44% |
| Fan Chaoting | 5 | 0.05% | 1 | 0.44% |
| Scott Mayhew | 5 | 0.05% | 1 | 0.44% |
| Linus Torvalds | 5 | 0.05% | 3 | 1.33% |
| Denis V. Lunev | 5 | 0.05% | 1 | 0.44% |
| Dan Carpenter | 4 | 0.04% | 2 | 0.89% |
| Alexey Dobriyan | 4 | 0.04% | 4 | 1.78% |
| Kevin Coffman | 4 | 0.04% | 1 | 0.44% |
| Paul Gortmaker | 3 | 0.03% | 1 | 0.44% |
| Boaz Harrosh | 2 | 0.02% | 1 | 0.44% |
| Pavel Emelyanov | 2 | 0.02% | 1 | 0.44% |
| Andrew Morton | 2 | 0.02% | 1 | 0.44% |
| Arjan van de Ven | 2 | 0.02% | 1 | 0.44% |
| Steven Rostedt | 1 | 0.01% | 1 | 0.44% |
| Thomas Gleixner | 1 | 0.01% | 1 | 0.44% |
| Mika Kukkonen | 1 | 0.01% | 1 | 0.44% |
| Tobias Klauser | 1 | 0.01% | 1 | 0.44% |
| Gustavo A. R. Silva | 1 | 0.01% | 1 | 0.44% |
| Yihao Wu | 1 | 0.01% | 1 | 0.44% |
| Total | 9539 | 225 |
// SPDX-License-Identifier: GPL-2.0-only /* * 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/fs_context.h> #include <linux/sunrpc/svcsock.h> #include <linux/lockd/lockd.h> #include <linux/sunrpc/addr.h> #include <linux/sunrpc/gss_api.h> #include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/svc.h> #include <linux/module.h> #include <linux/fsnotify.h> #include "idmap.h" #include "nfsd.h" #include "cache.h" #include "state.h" #include "netns.h" #include "pnfs.h" #include "filecache.h" #include "trace.h" #include "netlink.h" /* * We have a single directory with several nodes in it. */ enum { NFSD_Root = 1, NFSD_List, NFSD_Export_Stats, NFSD_Export_features, NFSD_Fh, NFSD_FO_UnlockIP, NFSD_FO_UnlockFS, NFSD_Threads, NFSD_Pool_Threads, NFSD_Pool_Stats, NFSD_Reply_Cache_Stats, NFSD_Versions, NFSD_Ports, NFSD_MaxBlkSize, NFSD_MaxConnections, NFSD_Filecache, NFSD_Leasetime, NFSD_Gracetime, NFSD_RecoveryDir, NFSD_V4EndGrace, NFSD_MaxReserved }; /* * 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); static ssize_t write_maxconn(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); #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); #endif static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); #endif static ssize_t (*const 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, [NFSD_MaxConnections] = write_maxconn, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = write_leasetime, [NFSD_Gracetime] = write_gracetime, #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING [NFSD_RecoveryDir] = write_recoverydir, #endif [NFSD_V4EndGrace] = write_v4_end_grace, #endif }; static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) { ino_t ino = file_inode(file)->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) return rv; simple_transaction_set(file, rv); return size; } 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_net_open(struct net *net, struct file *file) { int err; struct seq_file *seq; struct nfsd_net *nn = net_generic(net, nfsd_net_id); err = seq_open(file, &nfs_exports_op); if (err) return err; seq = file->private_data; seq->private = nn->svc_export_cache; return 0; } static int exports_nfsd_open(struct inode *inode, struct file *file) { return exports_net_open(inode->i_sb->s_fs_info, file); } static const struct file_operations exports_nfsd_operations = { .open = exports_nfsd_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; 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; } DEFINE_SHOW_ATTRIBUTE(export_features); static const struct file_operations pool_stats_operations = { .open = nfsd_pool_stats_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); /*----------------------------------------------------------------------------*/ /* * payload - write methods */ static inline struct net *netns(struct file *file) { return file_inode(file)->i_sb->s_fs_info; } /* * 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; struct net *net = netns(file); /* 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(net, fo_path, size, sap, salen) == 0) return -EINVAL; trace_nfsd_ctl_unlock_ip(net, buf); 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; trace_nfsd_ctl_unlock_fs(netns(file), fo_path); 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); nfsd4_revoke_states(netns(file), 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 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; maxsize = min(maxsize, NFS3_FHSIZE); if (qword_get(&mesg, mesg, size) > 0) return -EINVAL; trace_nfsd_ctl_filehandle(netns(file), dname, path, maxsize); /* we have all the words, they are in buf.. */ dom = unix_domain_find(dname); if (!dom) return -ENOMEM; len = exp_rootfh(netns(file), dom, path, &fh, maxsize); auth_domain_put(dom); if (len) return len; mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; qword_addhex(&mesg, &len, fh.fh_raw, 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; struct net *net = netns(file); if (size > 0) { int newthreads; rv = get_int(&mesg, &newthreads); if (rv) return rv; if (newthreads < 0) return -EINVAL; trace_nfsd_ctl_threads(net, newthreads); mutex_lock(&nfsd_mutex); rv = nfsd_svc(1, &newthreads, net, file->f_cred, NULL); mutex_unlock(&nfsd_mutex); if (rv < 0) return rv; } else rv = nfsd_nrthreads(net); 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; struct net *net = netns(file); mutex_lock(&nfsd_mutex); npools = nfsd_nrpools(net); 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; trace_nfsd_ctl_pool_threads(net, i, nthreads[i]); } /* * There must always be a thread in pool 0; the admin * can't shut down NFS completely using pool_threads. */ if (nthreads[0] == 0) nthreads[0] = 1; rv = nfsd_set_nrthreads(i, nthreads, net); if (rv) goto out_free; } rv = nfsd_get_nrthreads(npools, nthreads, net); 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 nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, const char *sep, unsigned vers, int minor) { const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); if (vers == 4 && minor >= 0 && !nfsd_minorversion(nn, minor, NFSD_TEST)) supported = false; if (minor == 0 && supported) /* * special case for backward compatability. * +4.0 is never reported, it is implied by * +4, unless -4.0 is present. */ return 0; return snprintf(buf, remaining, format, sep, supported ? '+' : '-', vers, minor); } static ssize_t __write_versions(struct file *file, char *buf, size_t size) { char *mesg = buf; char *vers, *minorp, sign; int len, num, remaining; ssize_t tlen = 0; char *sep; struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); if (size > 0) { if (nn->nfsd_serv) /* Cannot change versions without updating * nn->nfsd_serv->sv_xdrsize, and reallocing * rq_argp and rq_resp */ return -EBUSY; if (buf[size-1] != '\n') return -EINVAL; buf[size-1] = 0; trace_nfsd_ctl_version(netns(file), buf); vers = mesg; len = qword_get(&mesg, vers, size); if (len <= 0) return -EINVAL; do { enum vers_op cmd; unsigned minor; 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; if (kstrtouint(minorp+1, 0, &minor) < 0) return -EINVAL; } cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; switch(num) { #ifdef CONFIG_NFSD_V2 case 2: #endif case 3: nfsd_vers(nn, num, cmd); break; case 4: if (*minorp == '.') { if (nfsd_minorversion(nn, minor, cmd) < 0) return -EINVAL; } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { /* * Either we have +4 and no minors are enabled, * or we have -4 and at least one minor is enabled. * In either case, propagate 'cmd' to all minors. */ minor = 0; while (nfsd_minorversion(nn, minor, cmd) >= 0) minor++; } break; default: /* Ignore requests to disable non-existent versions */ if (cmd == NFSD_SET) return -EINVAL; } 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(nn); } /* Now write current state into reply buffer */ sep = ""; remaining = SIMPLE_TRANSACTION_LIMIT; for (num=2 ; num <= 4 ; num++) { int minor; if (!nfsd_vers(nn, num, NFSD_AVAIL)) continue; minor = -1; do { len = nfsd_print_version_support(nn, buf, remaining, sep, num, minor); if (len >= remaining) goto out; remaining -= len; buf += len; tlen += len; minor++; if (len) sep = " "; } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); } out: 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, struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); if (nn->nfsd_serv == NULL) return 0; return svc_xprt_names(nn->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, struct net *net, const struct cred *cred) { char *mesg = buf; int fd, err; struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct svc_serv *serv; err = get_int(&mesg, &fd); if (err != 0 || fd < 0) return -EINVAL; trace_nfsd_ctl_ports_addfd(net, fd); err = nfsd_create_serv(net); if (err != 0) return err; serv = nn->nfsd_serv; err = svc_addsock(serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) nfsd_destroy_serv(net); return err; } /* * A transport listener is added by writing its transport name and * a port number. */ static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) { char transport[16]; struct svc_xprt *xprt; int port, err; struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct svc_serv *serv; if (sscanf(buf, "%15s %5u", transport, &port) != 2) return -EINVAL; if (port < 1 || port > USHRT_MAX) return -EINVAL; trace_nfsd_ctl_ports_addxprt(net, transport, port); err = nfsd_create_serv(net); if (err != 0) return err; serv = nn->nfsd_serv; err = svc_xprt_create(serv, transport, net, PF_INET, port, SVC_SOCK_ANONYMOUS, cred); if (err < 0) goto out_err; err = svc_xprt_create(serv, transport, net, PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); if (err < 0 && err != -EAFNOSUPPORT) goto out_close; return 0; out_close: xprt = svc_find_xprt(serv, transport, net, PF_INET, port); if (xprt != NULL) { svc_xprt_close(xprt); svc_xprt_put(xprt); } out_err: if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) nfsd_destroy_serv(net); return err; } static ssize_t __write_ports(struct file *file, char *buf, size_t size, struct net *net) { if (size == 0) return __write_ports_names(buf, net); if (isdigit(buf[0])) return __write_ports_addfd(buf, net, file->f_cred); if (isalpha(buf[0])) return __write_ports_addxprt(buf, net, file->f_cred); 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 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 */ 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, netns(file)); 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; struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); if (size > 0) { int bsize; int rv = get_int(&mesg, &bsize); if (rv) return rv; trace_nfsd_ctl_maxblksize(netns(file), bsize); /* force bsize into allowed range and * required alignment. */ bsize = max_t(int, bsize, 1024); bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); bsize &= ~(1024-1); mutex_lock(&nfsd_mutex); if (nn->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); } /* * write_maxconn - Set or report the current max number of connections * * Input: * buf: ignored * size: zero * OR * * Input: * buf: C string containing an unsigned * integer value representing the new * number of max connections * 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 max_connections setting * for this net namespace; * 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_maxconn(struct file *file, char *buf, size_t size) { char *mesg = buf; struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); unsigned int maxconn = nn->max_connections; if (size > 0) { int rv = get_uint(&mesg, &maxconn); if (rv) return rv; trace_nfsd_ctl_maxconn(netns(file), maxconn); nn->max_connections = maxconn; } return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); } #ifdef CONFIG_NFSD_V4 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time64_t *time, struct nfsd_net *nn) { struct dentry *dentry = file_dentry(file); char *mesg = buf; int rv, i; if (size > 0) { if (nn->nfsd_serv) return -EBUSY; rv = get_int(&mesg, &i); if (rv) return rv; trace_nfsd_ctl_time(netns(file), dentry->d_name.name, dentry->d_name.len, i); /* * 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, "%lld\n", *time); } static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time64_t *time, struct nfsd_net *nn) { ssize_t rv; mutex_lock(&nfsd_mutex); rv = __nfsd4_write_time(file, buf, size, time, nn); 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) { struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); } /* * 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) { struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); } #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, struct nfsd_net *nn) { char *mesg = buf; char *recdir; int len, status; if (size > 0) { if (nn->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; trace_nfsd_ctl_recoverydir(netns(file), recdir); 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; struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); mutex_lock(&nfsd_mutex); rv = __write_recoverydir(file, buf, size, nn); mutex_unlock(&nfsd_mutex); return rv; } #endif /* * write_v4_end_grace - release grace period for nfsd's v4.x lock manager * * Input: * buf: ignored * size: zero * OR * * Input: * buf: any value * size: non-zero length of C string in @buf * Output: * passed-in buffer filled with "Y" or "N" with a newline * and NULL-terminated C string. This indicates whether * the grace period has ended in the current net * namespace. Return code is the size in bytes of the * string. Writing a string that starts with 'Y', 'y', or * '1' to the file will end the grace period for nfsd's v4 * lock manager. */ static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) { struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); if (size > 0) { switch(buf[0]) { case 'Y': case 'y': case '1': if (!nn->nfsd_serv) return -EBUSY; trace_nfsd_end_grace(netns(file)); nfsd4_end_grace(nn); break; default: return -EINVAL; } } return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", nn->grace_ended ? 'Y' : 'N'); } #endif /*----------------------------------------------------------------------------*/ /* * populating the filesystem. */ /* Basically copying rpc_get_inode. */ static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) { struct inode *inode = new_inode(sb); if (!inode) return NULL; /* Following advice from simple_fill_super documentation: */ inode->i_ino = iunique(sb, NFSD_MaxReserved); inode->i_mode = mode; simple_inode_init_ts(inode); switch (mode & S_IFMT) { case S_IFDIR: inode->i_fop = &simple_dir_operations; inode->i_op = &simple_dir_inode_operations; inc_nlink(inode); break; case S_IFLNK: inode->i_op = &simple_symlink_inode_operations; break; default: break; } return inode; } static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) { struct inode *inode; inode = nfsd_get_inode(dir->i_sb, mode); if (!inode) return -ENOMEM; if (ncl) { inode->i_private = ncl; kref_get(&ncl->cl_ref); } d_add(dentry, inode); inc_nlink(dir); fsnotify_mkdir(dir, dentry); return 0; } static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) { struct inode *dir = parent->d_inode; struct dentry *dentry; int ret = -ENOMEM; inode_lock(dir); dentry = d_alloc_name(parent, name); if (!dentry) goto out_err; ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); if (ret) goto out_err; out: inode_unlock(dir); return dentry; out_err: dput(dentry); dentry = ERR_PTR(ret); goto out; } #if IS_ENABLED(CONFIG_SUNRPC_GSS) static int __nfsd_symlink(struct inode *dir, struct dentry *dentry, umode_t mode, const char *content) { struct inode *inode; inode = nfsd_get_inode(dir->i_sb, mode); if (!inode) return -ENOMEM; inode->i_link = (char *)content; inode->i_size = strlen(content); d_add(dentry, inode); inc_nlink(dir); fsnotify_create(dir, dentry); return 0; } /* * @content is assumed to be a NUL-terminated string that lives * longer than the symlink itself. */ static void _nfsd_symlink(struct dentry *parent, const char *name, const char *content) { struct inode *dir = parent->d_inode; struct dentry *dentry; int ret; inode_lock(dir); dentry = d_alloc_name(parent, name); if (!dentry) goto out; ret = __nfsd_symlink(d_inode(parent), dentry, S_IFLNK | 0777, content); if (ret) dput(dentry); out: inode_unlock(dir); } #else static inline void _nfsd_symlink(struct dentry *parent, const char *name, const char *content) { } #endif static void clear_ncl(struct dentry *dentry) { struct inode *inode = d_inode(dentry); struct nfsdfs_client *ncl = inode->i_private; spin_lock(&inode->i_lock); inode->i_private = NULL; spin_unlock(&inode->i_lock); kref_put(&ncl->cl_ref, ncl->cl_release); } struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) { struct nfsdfs_client *nc; spin_lock(&inode->i_lock); nc = inode->i_private; if (nc) kref_get(&nc->cl_ref); spin_unlock(&inode->i_lock); return nc; } /* XXX: cut'n'paste from simple_fill_super; figure out if we could share * code instead. */ static int nfsdfs_create_files(struct dentry *root, const struct tree_descr *files, struct nfsdfs_client *ncl, struct dentry **fdentries) { struct inode *dir = d_inode(root); struct inode *inode; struct dentry *dentry; int i; inode_lock(dir); for (i = 0; files->name && files->name[0]; i++, files++) { dentry = d_alloc_name(root, files->name); if (!dentry) goto out; inode = nfsd_get_inode(d_inode(root)->i_sb, S_IFREG | files->mode); if (!inode) { dput(dentry); goto out; } kref_get(&ncl->cl_ref); inode->i_fop = files->ops; inode->i_private = ncl; d_add(dentry, inode); fsnotify_create(dir, dentry); if (fdentries) fdentries[i] = dentry; } inode_unlock(dir); return 0; out: inode_unlock(dir); return -ENOMEM; } /* on success, returns positive number unique to that client. */ struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, struct nfsdfs_client *ncl, u32 id, const struct tree_descr *files, struct dentry **fdentries) { struct dentry *dentry; char name[11]; int ret; sprintf(name, "%u", id); dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); if (IS_ERR(dentry)) /* XXX: tossing errors? */ return NULL; ret = nfsdfs_create_files(dentry, files, ncl, fdentries); if (ret) { nfsd_client_rmdir(dentry); return NULL; } return dentry; } /* Taken from __rpc_rmdir: */ void nfsd_client_rmdir(struct dentry *dentry) { simple_recursive_removal(dentry, clear_ncl); } static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) { struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); struct dentry *dentry; int ret; static const struct tree_descr nfsd_files[] = { [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, /* Per-export io stats use same ops as exports file */ [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, [NFSD_Export_features] = {"export_features", &export_features_fops, 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_Reply_Cache_Stats] = {"reply_cache_stats", &nfsd_reply_cache_stats_fops, 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}, [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO}, #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, #ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, #endif [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, #endif /* last one */ {""} }; ret = simple_fill_super(sb, 0x6e667364, nfsd_files); if (ret) return ret; _nfsd_symlink(sb->s_root, "supported_krb5_enctypes", "/proc/net/rpc/gss_krb5_enctypes"); dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); if (IS_ERR(dentry)) return PTR_ERR(dentry); nn->nfsd_client_dir = dentry; return 0; } static int nfsd_fs_get_tree(struct fs_context *fc) { return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); } static void nfsd_fs_free_fc(struct fs_context *fc) { if (fc->s_fs_info) put_net(fc->s_fs_info); } static const struct fs_context_operations nfsd_fs_context_ops = { .free = nfsd_fs_free_fc, .get_tree = nfsd_fs_get_tree, }; static int nfsd_init_fs_context(struct fs_context *fc) { put_user_ns(fc->user_ns); fc->user_ns = get_user_ns(fc->net_ns->user_ns); fc->ops = &nfsd_fs_context_ops; return 0; } static void nfsd_umount(struct super_block *sb) { struct net *net = sb->s_fs_info; nfsd_shutdown_threads(net); kill_litter_super(sb); put_net(net); } static struct file_system_type nfsd_fs_type = { .owner = THIS_MODULE, .name = "nfsd", .init_fs_context = nfsd_init_fs_context, .kill_sb = nfsd_umount, }; MODULE_ALIAS_FS("nfsd"); #ifdef CONFIG_PROC_FS static int exports_proc_open(struct inode *inode, struct file *file) { return exports_net_open(current->nsproxy->net_ns, file); } static const struct proc_ops exports_proc_ops = { .proc_open = exports_proc_open, .proc_read = seq_read, .proc_lseek = seq_lseek, .proc_release = seq_release, }; 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_proc_ops); if (!entry) { remove_proc_entry("fs/nfs", NULL); return -ENOMEM; } return 0; } #else /* CONFIG_PROC_FS */ static int create_proc_exports_entry(void) { return 0; } #endif unsigned int nfsd_net_id; static int nfsd_genl_rpc_status_compose_msg(struct sk_buff *skb, struct netlink_callback *cb, struct nfsd_genl_rqstp *rqstp) { void *hdr; u32 i; hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, &nfsd_nl_family, 0, NFSD_CMD_RPC_STATUS_GET); if (!hdr) return -ENOBUFS; if (nla_put_be32(skb, NFSD_A_RPC_STATUS_XID, rqstp->rq_xid) || nla_put_u32(skb, NFSD_A_RPC_STATUS_FLAGS, rqstp->rq_flags) || nla_put_u32(skb, NFSD_A_RPC_STATUS_PROG, rqstp->rq_prog) || nla_put_u32(skb, NFSD_A_RPC_STATUS_PROC, rqstp->rq_proc) || nla_put_u8(skb, NFSD_A_RPC_STATUS_VERSION, rqstp->rq_vers) || nla_put_s64(skb, NFSD_A_RPC_STATUS_SERVICE_TIME, ktime_to_us(rqstp->rq_stime), NFSD_A_RPC_STATUS_PAD)) return -ENOBUFS; switch (rqstp->rq_saddr.sa_family) { case AF_INET: { const struct sockaddr_in *s_in, *d_in; s_in = (const struct sockaddr_in *)&rqstp->rq_saddr; d_in = (const struct sockaddr_in *)&rqstp->rq_daddr; if (nla_put_in_addr(skb, NFSD_A_RPC_STATUS_SADDR4, s_in->sin_addr.s_addr) || nla_put_in_addr(skb, NFSD_A_RPC_STATUS_DADDR4, d_in->sin_addr.s_addr) || nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT, s_in->sin_port) || nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT, d_in->sin_port)) return -ENOBUFS; break; } case AF_INET6: { const struct sockaddr_in6 *s_in, *d_in; s_in = (const struct sockaddr_in6 *)&rqstp->rq_saddr; d_in = (const struct sockaddr_in6 *)&rqstp->rq_daddr; if (nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_SADDR6, &s_in->sin6_addr) || nla_put_in6_addr(skb, NFSD_A_RPC_STATUS_DADDR6, &d_in->sin6_addr) || nla_put_be16(skb, NFSD_A_RPC_STATUS_SPORT, s_in->sin6_port) || nla_put_be16(skb, NFSD_A_RPC_STATUS_DPORT, d_in->sin6_port)) return -ENOBUFS; break; } } for (i = 0; i < rqstp->rq_opcnt; i++) if (nla_put_u32(skb, NFSD_A_RPC_STATUS_COMPOUND_OPS, rqstp->rq_opnum[i])) return -ENOBUFS; genlmsg_end(skb, hdr); return 0; } /** * nfsd_nl_rpc_status_get_dumpit - Handle rpc_status_get dumpit * @skb: reply buffer * @cb: netlink metadata and command arguments * * Returns the size of the reply or a negative errno. */ int nfsd_nl_rpc_status_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) { int i, ret, rqstp_index = 0; struct nfsd_net *nn; mutex_lock(&nfsd_mutex); nn = net_generic(sock_net(skb->sk), nfsd_net_id); if (!nn->nfsd_serv) { ret = -ENODEV; goto out_unlock; } rcu_read_lock(); for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) { struct svc_rqst *rqstp; if (i < cb->args[0]) /* already consumed */ continue; rqstp_index = 0; list_for_each_entry_rcu(rqstp, &nn->nfsd_serv->sv_pools[i].sp_all_threads, rq_all) { struct nfsd_genl_rqstp genl_rqstp; unsigned int status_counter; if (rqstp_index++ < cb->args[1]) /* already consumed */ continue; /* * Acquire rq_status_counter before parsing the rqst * fields. rq_status_counter is set to an odd value in * order to notify the consumers the rqstp fields are * meaningful. */ status_counter = smp_load_acquire(&rqstp->rq_status_counter); if (!(status_counter & 1)) continue; genl_rqstp.rq_xid = rqstp->rq_xid; genl_rqstp.rq_flags = rqstp->rq_flags; genl_rqstp.rq_vers = rqstp->rq_vers; genl_rqstp.rq_prog = rqstp->rq_prog; genl_rqstp.rq_proc = rqstp->rq_proc; genl_rqstp.rq_stime = rqstp->rq_stime; genl_rqstp.rq_opcnt = 0; memcpy(&genl_rqstp.rq_daddr, svc_daddr(rqstp), sizeof(struct sockaddr)); memcpy(&genl_rqstp.rq_saddr, svc_addr(rqstp), sizeof(struct sockaddr)); #ifdef CONFIG_NFSD_V4 if (rqstp->rq_vers == NFS4_VERSION && rqstp->rq_proc == NFSPROC4_COMPOUND) { /* NFSv4 compound */ struct nfsd4_compoundargs *args; int j; args = rqstp->rq_argp; genl_rqstp.rq_opcnt = args->opcnt; for (j = 0; j < genl_rqstp.rq_opcnt; j++) genl_rqstp.rq_opnum[j] = args->ops[j].opnum; } #endif /* CONFIG_NFSD_V4 */ /* * Acquire rq_status_counter before reporting the rqst * fields to the user. */ if (smp_load_acquire(&rqstp->rq_status_counter) != status_counter) continue; ret = nfsd_genl_rpc_status_compose_msg(skb, cb, &genl_rqstp); if (ret) goto out; } } cb->args[0] = i; cb->args[1] = rqstp_index; ret = skb->len; out: rcu_read_unlock(); out_unlock: mutex_unlock(&nfsd_mutex); return ret; } /** * nfsd_nl_threads_set_doit - set the number of running threads * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_threads_set_doit(struct sk_buff *skb, struct genl_info *info) { int *nthreads, count = 0, nrpools, i, ret = -EOPNOTSUPP, rem; struct net *net = genl_info_net(info); struct nfsd_net *nn = net_generic(net, nfsd_net_id); const struct nlattr *attr; const char *scope = NULL; if (GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_THREADS)) return -EINVAL; /* count number of SERVER_THREADS values */ nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) { if (nla_type(attr) == NFSD_A_SERVER_THREADS) count++; } mutex_lock(&nfsd_mutex); nrpools = max(count, nfsd_nrpools(net)); nthreads = kcalloc(nrpools, sizeof(int), GFP_KERNEL); if (!nthreads) { ret = -ENOMEM; goto out_unlock; } i = 0; nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) { if (nla_type(attr) == NFSD_A_SERVER_THREADS) { nthreads[i++] = nla_get_u32(attr); if (i >= nrpools) break; } } if (info->attrs[NFSD_A_SERVER_GRACETIME] || info->attrs[NFSD_A_SERVER_LEASETIME] || info->attrs[NFSD_A_SERVER_SCOPE]) { ret = -EBUSY; if (nn->nfsd_serv && nn->nfsd_serv->sv_nrthreads) goto out_unlock; ret = -EINVAL; attr = info->attrs[NFSD_A_SERVER_GRACETIME]; if (attr) { u32 gracetime = nla_get_u32(attr); if (gracetime < 10 || gracetime > 3600) goto out_unlock; nn->nfsd4_grace = gracetime; } attr = info->attrs[NFSD_A_SERVER_LEASETIME]; if (attr) { u32 leasetime = nla_get_u32(attr); if (leasetime < 10 || leasetime > 3600) goto out_unlock; nn->nfsd4_lease = leasetime; } attr = info->attrs[NFSD_A_SERVER_SCOPE]; if (attr) scope = nla_data(attr); } ret = nfsd_svc(nrpools, nthreads, net, get_current_cred(), scope); if (ret > 0) ret = 0; out_unlock: mutex_unlock(&nfsd_mutex); kfree(nthreads); return ret; } /** * nfsd_nl_threads_get_doit - get the number of running threads * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_threads_get_doit(struct sk_buff *skb, struct genl_info *info) { struct net *net = genl_info_net(info); struct nfsd_net *nn = net_generic(net, nfsd_net_id); void *hdr; int err; skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; hdr = genlmsg_iput(skb, info); if (!hdr) { err = -EMSGSIZE; goto err_free_msg; } mutex_lock(&nfsd_mutex); err = nla_put_u32(skb, NFSD_A_SERVER_GRACETIME, nn->nfsd4_grace) || nla_put_u32(skb, NFSD_A_SERVER_LEASETIME, nn->nfsd4_lease) || nla_put_string(skb, NFSD_A_SERVER_SCOPE, nn->nfsd_name); if (err) goto err_unlock; if (nn->nfsd_serv) { int i; for (i = 0; i < nfsd_nrpools(net); ++i) { struct svc_pool *sp = &nn->nfsd_serv->sv_pools[i]; err = nla_put_u32(skb, NFSD_A_SERVER_THREADS, atomic_read(&sp->sp_nrthreads)); if (err) goto err_unlock; } } else { err = nla_put_u32(skb, NFSD_A_SERVER_THREADS, 0); if (err) goto err_unlock; } mutex_unlock(&nfsd_mutex); genlmsg_end(skb, hdr); return genlmsg_reply(skb, info); err_unlock: mutex_unlock(&nfsd_mutex); err_free_msg: nlmsg_free(skb); return err; } /** * nfsd_nl_version_set_doit - set the nfs enabled versions * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_version_set_doit(struct sk_buff *skb, struct genl_info *info) { const struct nlattr *attr; struct nfsd_net *nn; int i, rem; if (GENL_REQ_ATTR_CHECK(info, NFSD_A_SERVER_PROTO_VERSION)) return -EINVAL; mutex_lock(&nfsd_mutex); nn = net_generic(genl_info_net(info), nfsd_net_id); if (nn->nfsd_serv) { mutex_unlock(&nfsd_mutex); return -EBUSY; } /* clear current supported versions. */ nfsd_vers(nn, 2, NFSD_CLEAR); nfsd_vers(nn, 3, NFSD_CLEAR); for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) nfsd_minorversion(nn, i, NFSD_CLEAR); nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) { struct nlattr *tb[NFSD_A_VERSION_MAX + 1]; u32 major, minor = 0; bool enabled; if (nla_type(attr) != NFSD_A_SERVER_PROTO_VERSION) continue; if (nla_parse_nested(tb, NFSD_A_VERSION_MAX, attr, nfsd_version_nl_policy, info->extack) < 0) continue; if (!tb[NFSD_A_VERSION_MAJOR]) continue; major = nla_get_u32(tb[NFSD_A_VERSION_MAJOR]); if (tb[NFSD_A_VERSION_MINOR]) minor = nla_get_u32(tb[NFSD_A_VERSION_MINOR]); enabled = nla_get_flag(tb[NFSD_A_VERSION_ENABLED]); switch (major) { case 4: nfsd_minorversion(nn, minor, enabled ? NFSD_SET : NFSD_CLEAR); break; case 3: case 2: if (!minor) nfsd_vers(nn, major, enabled ? NFSD_SET : NFSD_CLEAR); break; default: break; } } mutex_unlock(&nfsd_mutex); return 0; } /** * nfsd_nl_version_get_doit - get the enabled status for all supported nfs versions * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_version_get_doit(struct sk_buff *skb, struct genl_info *info) { struct nfsd_net *nn; int i, err; void *hdr; skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; hdr = genlmsg_iput(skb, info); if (!hdr) { err = -EMSGSIZE; goto err_free_msg; } mutex_lock(&nfsd_mutex); nn = net_generic(genl_info_net(info), nfsd_net_id); for (i = 2; i <= 4; i++) { int j; for (j = 0; j <= NFSD_SUPPORTED_MINOR_VERSION; j++) { struct nlattr *attr; /* Don't record any versions the kernel doesn't have * compiled in */ if (!nfsd_support_version(i)) continue; /* NFSv{2,3} does not support minor numbers */ if (i < 4 && j) continue; attr = nla_nest_start(skb, NFSD_A_SERVER_PROTO_VERSION); if (!attr) { err = -EINVAL; goto err_nfsd_unlock; } if (nla_put_u32(skb, NFSD_A_VERSION_MAJOR, i) || nla_put_u32(skb, NFSD_A_VERSION_MINOR, j)) { err = -EINVAL; goto err_nfsd_unlock; } /* Set the enabled flag if the version is enabled */ if (nfsd_vers(nn, i, NFSD_TEST) && (i < 4 || nfsd_minorversion(nn, j, NFSD_TEST)) && nla_put_flag(skb, NFSD_A_VERSION_ENABLED)) { err = -EINVAL; goto err_nfsd_unlock; } nla_nest_end(skb, attr); } } mutex_unlock(&nfsd_mutex); genlmsg_end(skb, hdr); return genlmsg_reply(skb, info); err_nfsd_unlock: mutex_unlock(&nfsd_mutex); err_free_msg: nlmsg_free(skb); return err; } /** * nfsd_nl_listener_set_doit - set the nfs running sockets * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_listener_set_doit(struct sk_buff *skb, struct genl_info *info) { struct net *net = genl_info_net(info); struct svc_xprt *xprt, *tmp; const struct nlattr *attr; struct svc_serv *serv; LIST_HEAD(permsocks); struct nfsd_net *nn; int err, rem; mutex_lock(&nfsd_mutex); err = nfsd_create_serv(net); if (err) { mutex_unlock(&nfsd_mutex); return err; } nn = net_generic(net, nfsd_net_id); serv = nn->nfsd_serv; spin_lock_bh(&serv->sv_lock); /* Move all of the old listener sockets to a temp list */ list_splice_init(&serv->sv_permsocks, &permsocks); /* * Walk the list of server_socks from userland and move any that match * back to sv_permsocks */ nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) { struct nlattr *tb[NFSD_A_SOCK_MAX + 1]; const char *xcl_name; struct sockaddr *sa; if (nla_type(attr) != NFSD_A_SERVER_SOCK_ADDR) continue; if (nla_parse_nested(tb, NFSD_A_SOCK_MAX, attr, nfsd_sock_nl_policy, info->extack) < 0) continue; if (!tb[NFSD_A_SOCK_ADDR] || !tb[NFSD_A_SOCK_TRANSPORT_NAME]) continue; if (nla_len(tb[NFSD_A_SOCK_ADDR]) < sizeof(*sa)) continue; xcl_name = nla_data(tb[NFSD_A_SOCK_TRANSPORT_NAME]); sa = nla_data(tb[NFSD_A_SOCK_ADDR]); /* Put back any matching sockets */ list_for_each_entry_safe(xprt, tmp, &permsocks, xpt_list) { /* This shouldn't be possible */ if (WARN_ON_ONCE(xprt->xpt_net != net)) { list_move(&xprt->xpt_list, &serv->sv_permsocks); continue; } /* If everything matches, put it back */ if (!strcmp(xprt->xpt_class->xcl_name, xcl_name) && rpc_cmp_addr_port(sa, (struct sockaddr *)&xprt->xpt_local)) { list_move(&xprt->xpt_list, &serv->sv_permsocks); break; } } } /* For now, no removing old sockets while server is running */ if (serv->sv_nrthreads && !list_empty(&permsocks)) { list_splice_init(&permsocks, &serv->sv_permsocks); spin_unlock_bh(&serv->sv_lock); err = -EBUSY; goto out_unlock_mtx; } /* Close the remaining sockets on the permsocks list */ while (!list_empty(&permsocks)) { xprt = list_first_entry(&permsocks, struct svc_xprt, xpt_list); list_move(&xprt->xpt_list, &serv->sv_permsocks); /* * Newly-created sockets are born with the BUSY bit set. Clear * it if there are no threads, since nothing can pick it up * in that case. */ if (!serv->sv_nrthreads) clear_bit(XPT_BUSY, &xprt->xpt_flags); set_bit(XPT_CLOSE, &xprt->xpt_flags); spin_unlock_bh(&serv->sv_lock); svc_xprt_close(xprt); spin_lock_bh(&serv->sv_lock); } spin_unlock_bh(&serv->sv_lock); /* walk list of addrs again, open any that still don't exist */ nlmsg_for_each_attr(attr, info->nlhdr, GENL_HDRLEN, rem) { struct nlattr *tb[NFSD_A_SOCK_MAX + 1]; const char *xcl_name; struct sockaddr *sa; int ret; if (nla_type(attr) != NFSD_A_SERVER_SOCK_ADDR) continue; if (nla_parse_nested(tb, NFSD_A_SOCK_MAX, attr, nfsd_sock_nl_policy, info->extack) < 0) continue; if (!tb[NFSD_A_SOCK_ADDR] || !tb[NFSD_A_SOCK_TRANSPORT_NAME]) continue; if (nla_len(tb[NFSD_A_SOCK_ADDR]) < sizeof(*sa)) continue; xcl_name = nla_data(tb[NFSD_A_SOCK_TRANSPORT_NAME]); sa = nla_data(tb[NFSD_A_SOCK_ADDR]); xprt = svc_find_listener(serv, xcl_name, net, sa); if (xprt) { svc_xprt_put(xprt); continue; } ret = svc_xprt_create_from_sa(serv, xcl_name, net, sa, 0, get_current_cred()); /* always save the latest error */ if (ret < 0) err = ret; } if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) nfsd_destroy_serv(net); out_unlock_mtx: mutex_unlock(&nfsd_mutex); return err; } /** * nfsd_nl_listener_get_doit - get the nfs running listeners * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_listener_get_doit(struct sk_buff *skb, struct genl_info *info) { struct svc_xprt *xprt; struct svc_serv *serv; struct nfsd_net *nn; void *hdr; int err; skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; hdr = genlmsg_iput(skb, info); if (!hdr) { err = -EMSGSIZE; goto err_free_msg; } mutex_lock(&nfsd_mutex); nn = net_generic(genl_info_net(info), nfsd_net_id); /* no nfs server? Just send empty socket list */ if (!nn->nfsd_serv) goto out_unlock_mtx; serv = nn->nfsd_serv; spin_lock_bh(&serv->sv_lock); list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) { struct nlattr *attr; attr = nla_nest_start(skb, NFSD_A_SERVER_SOCK_ADDR); if (!attr) { err = -EINVAL; goto err_serv_unlock; } if (nla_put_string(skb, NFSD_A_SOCK_TRANSPORT_NAME, xprt->xpt_class->xcl_name) || nla_put(skb, NFSD_A_SOCK_ADDR, sizeof(struct sockaddr_storage), &xprt->xpt_local)) { err = -EINVAL; goto err_serv_unlock; } nla_nest_end(skb, attr); } spin_unlock_bh(&serv->sv_lock); out_unlock_mtx: mutex_unlock(&nfsd_mutex); genlmsg_end(skb, hdr); return genlmsg_reply(skb, info); err_serv_unlock: spin_unlock_bh(&serv->sv_lock); mutex_unlock(&nfsd_mutex); err_free_msg: nlmsg_free(skb); return err; } /** * nfsd_nl_pool_mode_set_doit - set the number of running threads * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_pool_mode_set_doit(struct sk_buff *skb, struct genl_info *info) { const struct nlattr *attr; if (GENL_REQ_ATTR_CHECK(info, NFSD_A_POOL_MODE_MODE)) return -EINVAL; attr = info->attrs[NFSD_A_POOL_MODE_MODE]; return sunrpc_set_pool_mode(nla_data(attr)); } /** * nfsd_nl_pool_mode_get_doit - get info about pool_mode * @skb: reply buffer * @info: netlink metadata and command arguments * * Return 0 on success or a negative errno. */ int nfsd_nl_pool_mode_get_doit(struct sk_buff *skb, struct genl_info *info) { struct net *net = genl_info_net(info); char buf[16]; void *hdr; int err; if (sunrpc_get_pool_mode(buf, ARRAY_SIZE(buf)) >= ARRAY_SIZE(buf)) return -ERANGE; skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; err = -EMSGSIZE; hdr = genlmsg_iput(skb, info); if (!hdr) goto err_free_msg; err = nla_put_string(skb, NFSD_A_POOL_MODE_MODE, buf) | nla_put_u32(skb, NFSD_A_POOL_MODE_NPOOLS, nfsd_nrpools(net)); if (err) goto err_free_msg; genlmsg_end(skb, hdr); return genlmsg_reply(skb, info); err_free_msg: nlmsg_free(skb); return err; } /** * nfsd_net_init - Prepare the nfsd_net portion of a new net namespace * @net: a freshly-created network namespace * * This information stays around as long as the network namespace is * alive whether or not there is an NFSD instance running in the * namespace. * * Returns zero on success, or a negative errno otherwise. */ static __net_init int nfsd_net_init(struct net *net) { int retval; struct nfsd_net *nn = net_generic(net, nfsd_net_id); retval = nfsd_export_init(net); if (retval) goto out_export_error; retval = nfsd_idmap_init(net); if (retval) goto out_idmap_error; retval = percpu_counter_init_many(nn->counter, 0, GFP_KERNEL, NFSD_STATS_COUNTERS_NUM); if (retval) goto out_repcache_error; memset(&nn->nfsd_svcstats, 0, sizeof(nn->nfsd_svcstats)); nn->nfsd_svcstats.program = &nfsd_program; nn->nfsd_versions = NULL; nn->nfsd4_minorversions = NULL; nn->nfsd_info.mutex = &nfsd_mutex; nn->nfsd_serv = NULL; nfsd4_init_leases_net(nn); get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); seqlock_init(&nn->writeverf_lock); nfsd_proc_stat_init(net); return 0; out_repcache_error: nfsd_idmap_shutdown(net); out_idmap_error: nfsd_export_shutdown(net); out_export_error: return retval; } /** * nfsd_net_exit - Release the nfsd_net portion of a net namespace * @net: a network namespace that is about to be destroyed * */ static __net_exit void nfsd_net_exit(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); nfsd_proc_stat_shutdown(net); percpu_counter_destroy_many(nn->counter, NFSD_STATS_COUNTERS_NUM); nfsd_idmap_shutdown(net); nfsd_export_shutdown(net); nfsd_netns_free_versions(nn); } static struct pernet_operations nfsd_net_ops = { .init = nfsd_net_init, .exit = nfsd_net_exit, .id = &nfsd_net_id, .size = sizeof(struct nfsd_net), }; static int __init init_nfsd(void) { int retval; retval = nfsd4_init_slabs(); if (retval) return retval; retval = nfsd4_init_pnfs(); if (retval) goto out_free_slabs; retval = nfsd_drc_slab_create(); if (retval) goto out_free_pnfs; nfsd_lockd_init(); /* lockd->nfsd callbacks */ retval = create_proc_exports_entry(); if (retval) goto out_free_lockd; retval = register_pernet_subsys(&nfsd_net_ops); if (retval < 0) goto out_free_exports; retval = register_cld_notifier(); if (retval) goto out_free_subsys; retval = nfsd4_create_laundry_wq(); if (retval) goto out_free_cld; retval = register_filesystem(&nfsd_fs_type); if (retval) goto out_free_all; retval = genl_register_family(&nfsd_nl_family); if (retval) goto out_free_all; return 0; out_free_all: nfsd4_destroy_laundry_wq(); out_free_cld: unregister_cld_notifier(); out_free_subsys: unregister_pernet_subsys(&nfsd_net_ops); out_free_exports: remove_proc_entry("fs/nfs/exports", NULL); remove_proc_entry("fs/nfs", NULL); out_free_lockd: nfsd_lockd_shutdown(); nfsd_drc_slab_free(); out_free_pnfs: nfsd4_exit_pnfs(); out_free_slabs: nfsd4_free_slabs(); return retval; } static void __exit exit_nfsd(void) { genl_unregister_family(&nfsd_nl_family); unregister_filesystem(&nfsd_fs_type); nfsd4_destroy_laundry_wq(); unregister_cld_notifier(); unregister_pernet_subsys(&nfsd_net_ops); nfsd_drc_slab_free(); remove_proc_entry("fs/nfs/exports", NULL); remove_proc_entry("fs/nfs", NULL); nfsd_lockd_shutdown(); nfsd4_free_slabs(); nfsd4_exit_pnfs(); } MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); MODULE_DESCRIPTION("In-kernel NFS server"); MODULE_LICENSE("GPL"); module_init(init_nfsd) module_exit(exit_nfsd)
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