#include "nfslib.h"
#include "exportfs.h"
#include "mountd.h"
-#include "xmalloc.h"
#include "fsloc.h"
#include "pseudoflavors.h"
#include "blkid/blkid.h"
#endif
+/*
+ * Invoked by RPC service loop
+ */
+void cache_set_fds(fd_set *fdset);
+int cache_process_req(fd_set *readfds);
enum nfsd_fsid {
FSID_DEV = 0,
* Record is terminated with newline.
*
*/
-int cache_export_ent(char *domain, struct exportent *exp, char *p);
+static int cache_export_ent(char *domain, struct exportent *exp, char *p);
+#define INITIAL_MANAGED_GROUPS 100
char *lbuf = NULL;
int lbuflen = 0;
extern int use_ipaddr;
-void auth_unix_ip(FILE *f)
+static void auth_unix_ip(FILE *f)
{
/* requests are
* class IP-ADDR
*/
char *cp;
char class[20];
- char ipaddr[20];
+ char ipaddr[INET6_ADDRSTRLEN];
char *client = NULL;
struct addrinfo *tmp = NULL;
- struct addrinfo *ai = NULL;
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
strcmp(class, "nfsd") != 0)
return;
- if (qword_get(&cp, ipaddr, 20) <= 0)
+ if (qword_get(&cp, ipaddr, sizeof(ipaddr)) <= 0)
return;
tmp = host_pton(ipaddr);
/* addr is a valid, interesting address, find the domain name... */
if (!use_ipaddr) {
+ struct addrinfo *ai = NULL;
+
ai = client_resolve(tmp->ai_addr);
- client = client_compose(ai);
- freeaddrinfo(ai);
+ if (ai) {
+ client = client_compose(ai);
+ freeaddrinfo(ai);
+ }
}
- freeaddrinfo(tmp);
-
qword_print(f, "nfsd");
qword_print(f, ipaddr);
- qword_printint(f, time(0)+30*60);
+ qword_printtimefrom(f, DEFAULT_TTL);
if (use_ipaddr)
qword_print(f, ipaddr);
else if (client)
xlog(D_CALL, "auth_unix_ip: client %p '%s'", client, client?client: "DEFAULT");
free(client);
+ freeaddrinfo(tmp);
+
}
-void auth_unix_gid(FILE *f)
+static void auth_unix_gid(FILE *f)
{
/* Request are
* uid
*/
uid_t uid;
struct passwd *pw;
- gid_t glist[100], *groups = glist;
- int ngroups = 100;
+ static gid_t *groups = NULL;
+ static int groups_len = 0;
+ gid_t *more_groups;
+ int ngroups;
int rv, i;
char *cp;
+ if (groups_len == 0) {
+ groups = malloc(sizeof(gid_t) * INITIAL_MANAGED_GROUPS);
+ if (!groups)
+ return;
+
+ groups_len = INITIAL_MANAGED_GROUPS;
+ }
+
+ ngroups = groups_len;
+
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
rv = -1;
else {
rv = getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
- if (rv == -1 && ngroups >= 100) {
- groups = malloc(sizeof(gid_t)*ngroups);
- if (!groups)
+ if (rv == -1 && ngroups >= groups_len) {
+ more_groups = realloc(groups, sizeof(gid_t)*ngroups);
+ if (!more_groups)
rv = -1;
- else
+ else {
+ groups = more_groups;
+ groups_len = ngroups;
rv = getgrouplist(pw->pw_name, pw->pw_gid,
groups, &ngroups);
+ }
}
}
qword_printuint(f, uid);
- qword_printuint(f, time(0)+30*60);
+ qword_printtimefrom(f, DEFAULT_TTL);
if (rv >= 0) {
qword_printuint(f, ngroups);
for (i=0; i<ngroups; i++)
} else
qword_printuint(f, 0);
qword_eol(f);
-
- if (groups != glist)
- free(groups);
}
#if USE_BLKID
#define get_uuid_blkdev(path) (NULL)
#endif
-int get_uuid(const char *val, int uuidlen, char *u)
+static int get_uuid(const char *val, size_t uuidlen, char *u)
{
/* extract hex digits from uuidstr and compose a uuid
* of the given length (max 16), xoring bytes to make
* a smaller uuid.
*/
- int i = 0;
+ size_t i = 0;
memset(u, 0, uuidlen);
for ( ; *val ; val++) {
- char c = *val;
+ int c = *val;
if (!isxdigit(c))
continue;
if (isalpha(c)) {
c = c - '0' + 0;
if ((i&1) == 0)
c <<= 4;
- u[i/2] ^= c;
+ u[i/2] ^= (char)c;
i++;
if (i == uuidlen*2)
i = 0;
return 1;
}
-int uuid_by_path(char *path, int type, int uuidlen, char *uuid)
+static int uuid_by_path(char *path, int type, size_t uuidlen, char *uuid)
{
/* get a uuid for the filesystem found at 'path'.
* There are several possible ways of generating the
{
FILE *f;
struct mntent *me;
- int l = strlen(p);
+ size_t l = strlen(p);
if (*v == NULL) {
f = setmntent("/etc/mtab", "r");
*v = f;
return me->mnt_dir;
}
-void nfsd_fh(FILE *f)
+static int is_subdirectory(char *child, char *parent)
{
- /* request are:
- * domain fsidtype fsid
- * interpret fsid, find export point and options, and write:
- * domain fsidtype fsid expiry path
- */
- char *cp;
- char *dom;
- int fsidtype;
- int fsidlen;
- unsigned int dev, major=0, minor=0;
- unsigned int inode=0;
- unsigned long long inode64;
- unsigned int fsidnum=0;
- char fsid[32];
- struct exportent *found = NULL;
- struct addrinfo *ai = NULL;
- char *found_path = NULL;
- nfs_export *exp;
- int i;
- int dev_missing = 0;
- int uuidlen = 0;
- char *fhuuid = NULL;
+ size_t l = strlen(parent);
- if (readline(fileno(f), &lbuf, &lbuflen) != 1)
- return;
+ if (strcmp(parent, "/") == 0)
+ return 1;
- xlog(D_CALL, "nfsd_fh: inbuf '%s'", lbuf);
+ return strcmp(child, parent) == 0
+ || (strncmp(child, parent, l) == 0 && child[l] == '/');
+}
- cp = lbuf;
-
- dom = malloc(strlen(cp));
- if (dom == NULL)
- return;
- if (qword_get(&cp, dom, strlen(cp)) <= 0)
- goto out;
- if (qword_get_int(&cp, &fsidtype) != 0)
- goto out;
- if (fsidtype < 0 || fsidtype > 7)
- goto out; /* unknown type */
- if ((fsidlen = qword_get(&cp, fsid, 32)) <= 0)
- goto out;
+static int path_matches(nfs_export *exp, char *path)
+{
+ if (exp->m_export.e_flags & NFSEXP_CROSSMOUNT)
+ return is_subdirectory(path, exp->m_export.e_path);
+ return strcmp(path, exp->m_export.e_path) == 0;
+}
+
+static int
+export_matches(nfs_export *exp, char *dom, char *path, struct addrinfo *ai)
+{
+ return path_matches(exp, path) && client_matches(exp, dom, ai);
+}
+
+/* True iff e1 is a child of e2 and e2 has crossmnt set: */
+static bool subexport(struct exportent *e1, struct exportent *e2)
+{
+ char *p1 = e1->e_path, *p2 = e2->e_path;
+ return e2->e_flags & NFSEXP_CROSSMOUNT
+ && is_subdirectory(p1, p2);
+}
+
+struct parsed_fsid {
+ int fsidtype;
+ /* We could use a union for this, but it would be more
+ * complicated; why bother? */
+ unsigned int inode;
+ unsigned int minor;
+ unsigned int major;
+ unsigned int fsidnum;
+ size_t uuidlen;
+ char *fhuuid;
+};
+
+static int parse_fsid(int fsidtype, int fsidlen, char *fsid,
+ struct parsed_fsid *parsed)
+{
+ unsigned int dev;
+ unsigned long long inode64;
+
+ memset(parsed, 0, sizeof(*parsed));
+ parsed->fsidtype = fsidtype;
switch(fsidtype) {
case FSID_DEV: /* 4 bytes: 2 major, 2 minor, 4 inode */
if (fsidlen != 8)
- goto out;
+ return -1;
memcpy(&dev, fsid, 4);
- memcpy(&inode, fsid+4, 4);
- major = ntohl(dev)>>16;
- minor = ntohl(dev) & 0xFFFF;
+ memcpy(&parsed->inode, fsid+4, 4);
+ parsed->major = ntohl(dev)>>16;
+ parsed->minor = ntohl(dev) & 0xFFFF;
break;
case FSID_NUM: /* 4 bytes - fsid */
if (fsidlen != 4)
- goto out;
- memcpy(&fsidnum, fsid, 4);
+ return -1;
+ memcpy(&parsed->fsidnum, fsid, 4);
break;
case FSID_MAJOR_MINOR: /* 12 bytes: 4 major, 4 minor, 4 inode
* an historical accident
*/
if (fsidlen != 12)
- goto out;
- memcpy(&dev, fsid, 4); major = ntohl(dev);
- memcpy(&dev, fsid+4, 4); minor = ntohl(dev);
- memcpy(&inode, fsid+8, 4);
+ return -1;
+ memcpy(&dev, fsid, 4);
+ parsed->major = ntohl(dev);
+ memcpy(&dev, fsid+4, 4);
+ parsed->minor = ntohl(dev);
+ memcpy(&parsed->inode, fsid+8, 4);
break;
case FSID_ENCODE_DEV: /* 8 bytes: 4 byte packed device number, 4 inode */
* no-one outside this host has any business interpreting it
*/
if (fsidlen != 8)
- goto out;
+ return -1;
memcpy(&dev, fsid, 4);
- memcpy(&inode, fsid+4, 4);
- major = (dev & 0xfff00) >> 8;
- minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
+ memcpy(&parsed->inode, fsid+4, 4);
+ parsed->major = (dev & 0xfff00) >> 8;
+ parsed->minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
break;
case FSID_UUID4_INUM: /* 4 byte inode number and 4 byte uuid */
if (fsidlen != 8)
- goto out;
- memcpy(&inode, fsid, 4);
- uuidlen = 4;
- fhuuid = fsid+4;
+ return -1;
+ memcpy(&parsed->inode, fsid, 4);
+ parsed->uuidlen = 4;
+ parsed->fhuuid = fsid+4;
break;
case FSID_UUID8: /* 8 byte uuid */
if (fsidlen != 8)
- goto out;
- uuidlen = 8;
- fhuuid = fsid;
+ return -1;
+ parsed->uuidlen = 8;
+ parsed->fhuuid = fsid;
break;
case FSID_UUID16: /* 16 byte uuid */
if (fsidlen != 16)
- goto out;
- uuidlen = 16;
- fhuuid = fsid;
+ return -1;
+ parsed->uuidlen = 16;
+ parsed->fhuuid = fsid;
break;
case FSID_UUID16_INUM: /* 8 byte inode number and 16 byte uuid */
if (fsidlen != 24)
- goto out;
+ return -1;
memcpy(&inode64, fsid, 8);
- inode = inode64;
- uuidlen = 16;
- fhuuid = fsid+8;
+ parsed->inode = inode64;
+ parsed->uuidlen = 16;
+ parsed->fhuuid = fsid+8;
break;
}
+ return 0;
+}
+
+static bool match_fsid(struct parsed_fsid *parsed, nfs_export *exp, char *path)
+{
+ struct stat stb;
+ int type;
+ char u[16];
+
+ if (stat(path, &stb) != 0)
+ return false;
+ if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode))
+ return false;
+
+ switch (parsed->fsidtype) {
+ case FSID_DEV:
+ case FSID_MAJOR_MINOR:
+ case FSID_ENCODE_DEV:
+ if (stb.st_ino != parsed->inode)
+ return false;
+ if (parsed->major != major(stb.st_dev) ||
+ parsed->minor != minor(stb.st_dev))
+ return false;
+ return true;
+ case FSID_NUM:
+ if (((exp->m_export.e_flags & NFSEXP_FSID) == 0 ||
+ exp->m_export.e_fsid != parsed->fsidnum))
+ return false;
+ return true;
+ case FSID_UUID4_INUM:
+ case FSID_UUID16_INUM:
+ if (stb.st_ino != parsed->inode)
+ return false;
+ goto check_uuid;
+ case FSID_UUID8:
+ case FSID_UUID16:
+ if (!is_mountpoint(path))
+ return false;
+ check_uuid:
+ if (exp->m_export.e_uuid)
+ get_uuid(exp->m_export.e_uuid, parsed->uuidlen, u);
+ else
+ for (type = 0;
+ uuid_by_path(path, type, parsed->uuidlen, u);
+ type++)
+ if (memcmp(u, parsed->fhuuid, parsed->uuidlen) == 0)
+ return true;
+
+ if (memcmp(u, parsed->fhuuid, parsed->uuidlen) != 0)
+ return false;
+ return true;
+ }
+ /* Well, unreachable, actually: */
+ return false;
+}
+
+static struct addrinfo *lookup_client_addr(char *dom)
+{
+ struct addrinfo *ret;
+ struct addrinfo *tmp;
+
+ dom++; /* skip initial "$" */
+
+ tmp = host_pton(dom);
+ if (tmp == NULL)
+ return NULL;
+ ret = client_resolve(tmp->ai_addr);
+ freeaddrinfo(tmp);
+ return ret;
+}
+
+static void nfsd_fh(FILE *f)
+{
+ /* request are:
+ * domain fsidtype fsid
+ * interpret fsid, find export point and options, and write:
+ * domain fsidtype fsid expiry path
+ */
+ char *cp;
+ char *dom;
+ int fsidtype;
+ int fsidlen;
+ char fsid[32];
+ struct parsed_fsid parsed;
+ struct exportent *found = NULL;
+ struct addrinfo *ai = NULL;
+ char *found_path = NULL;
+ nfs_export *exp;
+ int i;
+ int dev_missing = 0;
+
+ if (readline(fileno(f), &lbuf, &lbuflen) != 1)
+ return;
+
+ xlog(D_CALL, "nfsd_fh: inbuf '%s'", lbuf);
+
+ cp = lbuf;
+
+ dom = malloc(strlen(cp));
+ if (dom == NULL)
+ return;
+ if (qword_get(&cp, dom, strlen(cp)) <= 0)
+ goto out;
+ if (qword_get_int(&cp, &fsidtype) != 0)
+ goto out;
+ if (fsidtype < 0 || fsidtype > 7)
+ goto out; /* unknown type */
+ if ((fsidlen = qword_get(&cp, fsid, 32)) <= 0)
+ goto out;
+ if (parse_fsid(fsidtype, fsidlen, fsid, &parsed))
+ goto out;
auth_reload();
+ if (is_ipaddr_client(dom)) {
+ ai = lookup_client_addr(dom);
+ if (!ai)
+ goto out;
+ }
+
/* Now determine export point for this fsid/domain */
for (i=0 ; i < MCL_MAXTYPES; i++) {
nfs_export *next_exp;
for (exp = exportlist[i].p_head; exp; exp = next_exp) {
- struct stat stb;
- char u[16];
char *path;
- int type;
if (exp->m_export.e_flags & NFSEXP_CROSSMOUNT) {
static nfs_export *prev = NULL;
next_exp = exp->m_next;
}
- if (!use_ipaddr && !client_member(dom, exp->m_client->m_hostname))
+ if (!is_ipaddr_client(dom)
+ && !namelist_client_matches(exp, dom))
continue;
if (exp->m_export.e_mountpoint &&
!is_mountpoint(exp->m_export.e_mountpoint[0]?
exp->m_export.e_mountpoint:
exp->m_export.e_path))
dev_missing ++;
- if (stat(path, &stb) != 0)
+
+ if (!match_fsid(&parsed, exp, path))
continue;
- if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) {
+ if (is_ipaddr_client(dom)
+ && !ipaddr_client_matches(exp, ai))
continue;
- }
- switch(fsidtype){
- case FSID_DEV:
- case FSID_MAJOR_MINOR:
- case FSID_ENCODE_DEV:
- if (stb.st_ino != inode)
- continue;
- if (major != major(stb.st_dev) ||
- minor != minor(stb.st_dev))
- continue;
- break;
- case FSID_NUM:
- if (((exp->m_export.e_flags & NFSEXP_FSID) == 0 ||
- exp->m_export.e_fsid != fsidnum))
- continue;
- break;
- case FSID_UUID4_INUM:
- case FSID_UUID16_INUM:
- if (stb.st_ino != inode)
- continue;
- goto check_uuid;
- case FSID_UUID8:
- case FSID_UUID16:
- if (!is_mountpoint(path))
- continue;
- check_uuid:
- if (exp->m_export.e_uuid)
- get_uuid(exp->m_export.e_uuid,
- uuidlen, u);
- else
- for (type = 0;
- uuid_by_path(path, type, uuidlen, u);
- type++)
- if (memcmp(u, fhuuid, uuidlen) == 0)
- break;
-
- if (memcmp(u, fhuuid, uuidlen) != 0)
- continue;
- break;
- }
- if (use_ipaddr) {
- if (ai == NULL) {
- struct addrinfo *tmp;
- tmp = host_pton(dom);
- if (tmp == NULL)
- goto out;
- ai = client_resolve(tmp->ai_addr);
- freeaddrinfo(tmp);
- }
- if (!client_check(exp->m_client, ai))
- continue;
- }
- /* It's a match !! */
- if (!found) {
+ if (!found || subexport(&exp->m_export, found)) {
found = &exp->m_export;
+ free(found_path);
found_path = strdup(path);
if (found_path == NULL)
goto out;
- } else if (strcmp(found->e_path, exp->m_export.e_path)!= 0)
+ } else if (strcmp(found->e_path, exp->m_export.e_path) != 0
+ && !subexport(found, &exp->m_export))
{
xlog(L_WARNING, "%s and %s have same filehandle for %s, using first",
found_path, path, dom);
+ } else {
+ /* same path, if one is V4ROOT, choose the other */
+ if (found->e_flags & NFSEXP_V4ROOT) {
+ found = &exp->m_export;
+ free(found_path);
+ found_path = strdup(path);
+ if (found_path == NULL)
+ goto out;
+ }
}
}
}
return;
}
-static void write_fsloc(FILE *f, struct exportent *ep, char *path)
+static void write_fsloc(FILE *f, struct exportent *ep)
{
struct servers *servers;
{
qword_print(f, domain);
qword_print(f, path);
- qword_printint(f, time(0)+30*60);
if (exp) {
int different_fs = strcmp(path, exp->e_path) != 0;
int flag_mask = different_fs ? ~NFSEXP_FSID : ~0;
+ qword_printtimefrom(f, exp->e_ttl);
qword_printint(f, exp->e_flags & flag_mask);
qword_printint(f, exp->e_anonuid);
qword_printint(f, exp->e_anongid);
qword_printint(f, exp->e_fsid);
- write_fsloc(f, exp, path);
+ write_fsloc(f, exp);
write_secinfo(f, exp, flag_mask);
if (exp->e_uuid == NULL || different_fs) {
char u[16];
qword_print(f, "uuid");
qword_printhex(f, u, 16);
}
- }
+ } else
+ qword_printtimefrom(f, DEFAULT_TTL);
return qword_eol(f);
}
-static int is_subdirectory(char *child, char *parent)
-{
- int l = strlen(parent);
-
- return strcmp(child, parent) == 0
- || (strncmp(child, parent, l) == 0 && child[l] == '/');
-}
-
-static int path_matches(nfs_export *exp, char *path)
-{
- if (exp->m_export.e_flags & NFSEXP_CROSSMOUNT)
- return is_subdirectory(path, exp->m_export.e_path);
- return strcmp(path, exp->m_export.e_path) == 0;
-}
-
-static int
-client_matches(nfs_export *exp, char *dom, struct addrinfo *ai)
-{
- if (use_ipaddr)
- return client_check(exp->m_client, ai);
- return client_member(dom, exp->m_client->m_hostname);
-}
-
-static int
-export_matches(nfs_export *exp, char *dom, char *path, struct addrinfo *ai)
-{
- return path_matches(exp, path) && client_matches(exp, dom, ai);
-}
-
static nfs_export *
lookup_export(char *dom, char *path, struct addrinfo *ai)
{
found_type = i;
continue;
}
-
- /* Always prefer non-V4ROOT mounts */
- if (found->m_export.e_flags & NFSEXP_V4ROOT)
+ /* Always prefer non-V4ROOT exports */
+ if (exp->m_export.e_flags & NFSEXP_V4ROOT)
continue;
+ if (found->m_export.e_flags & NFSEXP_V4ROOT) {
+ found = exp;
+ found_type = i;
+ continue;
+ }
/* If one is a CROSSMOUNT, then prefer the longest path */
if (((found->m_export.e_flags & NFSEXP_CROSSMOUNT) ||
return found;
}
-void nfsd_export(FILE *f)
+#ifdef HAVE_NFS_PLUGIN_H
+#include <dlfcn.h>
+#include <link.h>
+#include <nfs-plugin.h>
+
+/*
+ * Find the export entry for the parent of "pathname".
+ * Caller must not free returned exportent.
+ */
+static struct exportent *lookup_parent_export(char *dom,
+ const char *pathname, struct addrinfo *ai)
+{
+ char *parent, *slash;
+ nfs_export *result;
+
+ parent = strdup(pathname);
+ if (parent == NULL) {
+ xlog(D_GENERAL, "%s: failed to allocate parent path buffer",
+ __func__);
+ goto out_default;
+ }
+ xlog(D_CALL, "%s: pathname = '%s'", __func__, pathname);
+
+again:
+ /* shorten pathname by one component */
+ slash = strrchr(parent, '/');
+ if (slash == NULL) {
+ xlog(D_GENERAL, "%s: no slash found in pathname",
+ __func__);
+ goto out_default;
+ }
+ *slash = '\0';
+
+ if (strlen(parent) == 0) {
+ result = lookup_export(dom, "/", ai);
+ if (result == NULL) {
+ xlog(L_ERROR, "%s: no root export found.", __func__);
+ goto out_default;
+ }
+ goto out;
+ }
+
+ result = lookup_export(dom, parent, ai);
+ if (result == NULL) {
+ xlog(D_GENERAL, "%s: lookup_export(%s) found nothing",
+ __func__, parent);
+ goto again;
+ }
+
+out:
+ xlog(D_CALL, "%s: found export for %s", __func__, parent);
+ free(parent);
+ return &result->m_export;
+
+out_default:
+ free(parent);
+ return mkexportent("*", "/", "insecure");
+}
+
+/*
+ * Walk through a set of FS locations and build an e_fslocdata string.
+ * Returns true if all went to plan; otherwise, false.
+ */
+static bool locations_to_fslocdata(struct jp_ops *ops,
+ nfs_fsloc_set_t locations, char *fslocdata,
+ size_t remaining, int *ttl)
+{
+ char *server, *last_path, *rootpath, *ptr;
+ _Bool seen = false;
+
+ last_path = NULL;
+ rootpath = NULL;
+ server = NULL;
+ ptr = fslocdata;
+ *ttl = 0;
+
+ for (;;) {
+ enum jp_status status;
+ int len;
+
+ status = ops->jp_get_next_location(locations, &server,
+ &rootpath, ttl);
+ if (status == JP_EMPTY)
+ break;
+ if (status != JP_OK) {
+ xlog(D_GENERAL, "%s: failed to parse location: %s",
+ __func__, ops->jp_error(status));
+ goto out_false;
+ }
+ xlog(D_GENERAL, "%s: Location: %s:%s",
+ __func__, server, rootpath);
+
+ if (last_path && strcmp(rootpath, last_path) == 0) {
+ len = snprintf(ptr, remaining, "+%s", server);
+ if (len < 0) {
+ xlog(D_GENERAL, "%s: snprintf: %m", __func__);
+ goto out_false;
+ }
+ if ((size_t)len >= remaining) {
+ xlog(D_GENERAL, "%s: fslocdata buffer overflow", __func__);
+ goto out_false;
+ }
+ remaining -= (size_t)len;
+ ptr += len;
+ } else {
+ if (last_path == NULL)
+ len = snprintf(ptr, remaining, "%s@%s",
+ rootpath, server);
+ else
+ len = snprintf(ptr, remaining, ":%s@%s",
+ rootpath, server);
+ if (len < 0) {
+ xlog(D_GENERAL, "%s: snprintf: %m", __func__);
+ goto out_false;
+ }
+ if ((size_t)len >= remaining) {
+ xlog(D_GENERAL, "%s: fslocdata buffer overflow",
+ __func__);
+ goto out_false;
+ }
+ remaining -= (size_t)len;
+ ptr += len;
+ last_path = rootpath;
+ }
+
+ seen = true;
+ free(rootpath);
+ free(server);
+ }
+
+ xlog(D_CALL, "%s: fslocdata='%s', ttl=%d",
+ __func__, fslocdata, *ttl);
+ return seen;
+
+out_false:
+ free(rootpath);
+ free(server);
+ return false;
+}
+
+/*
+ * Duplicate the junction's parent's export options and graft in
+ * the fslocdata we constructed from the locations list.
+ */
+static struct exportent *create_junction_exportent(struct exportent *parent,
+ const char *junction, const char *fslocdata, int ttl)
+{
+ static struct exportent *eep;
+
+ eep = (struct exportent *)malloc(sizeof(*eep));
+ if (eep == NULL)
+ goto out_nomem;
+
+ dupexportent(eep, parent);
+ strcpy(eep->e_path, junction);
+ eep->e_hostname = strdup(parent->e_hostname);
+ if (eep->e_hostname == NULL) {
+ free(eep);
+ goto out_nomem;
+ }
+ free(eep->e_uuid);
+ eep->e_uuid = NULL;
+ eep->e_ttl = (unsigned int)ttl;
+
+ free(eep->e_fslocdata);
+ eep->e_fslocdata = strdup(fslocdata);
+ if (eep->e_fslocdata == NULL) {
+ free(eep->e_hostname);
+ free(eep);
+ goto out_nomem;
+ }
+ eep->e_fslocmethod = FSLOC_REFER;
+ return eep;
+
+out_nomem:
+ xlog(L_ERROR, "%s: No memory", __func__);
+ return NULL;
+}
+
+/*
+ * Walk through the set of FS locations and build an exportent.
+ * Returns pointer to an exportent if "junction" refers to a junction.
+ */
+static struct exportent *locations_to_export(struct jp_ops *ops,
+ nfs_fsloc_set_t locations, const char *junction,
+ struct exportent *parent)
+{
+ static char fslocdata[BUFSIZ];
+ int ttl;
+
+ fslocdata[0] = '\0';
+ if (!locations_to_fslocdata(ops, locations,
+ fslocdata, sizeof(fslocdata), &ttl))
+ return NULL;
+ return create_junction_exportent(parent, junction, fslocdata, ttl);
+}
+
+/*
+ * Retrieve locations information in "junction" and dump it to the
+ * kernel. Returns pointer to an exportent if "junction" refers
+ * to a junction.
+ */
+static struct exportent *invoke_junction_ops(void *handle, char *dom,
+ const char *junction, struct addrinfo *ai)
+{
+ struct exportent *parent, *exp = NULL;
+ nfs_fsloc_set_t locations;
+ enum jp_status status;
+ struct jp_ops *ops;
+ char *error;
+
+ ops = (struct jp_ops *)dlsym(handle, "nfs_junction_ops");
+ error = dlerror();
+ if (error != NULL) {
+ xlog(D_GENERAL, "%s: dlsym(jp_junction_ops): %s",
+ __func__, error);
+ return NULL;
+ }
+ if (ops->jp_api_version != JP_API_VERSION) {
+ xlog(D_GENERAL, "%s: unrecognized junction API version: %u",
+ __func__, ops->jp_api_version);
+ return NULL;
+ }
+
+ status = ops->jp_init(false);
+ if (status != JP_OK) {
+ xlog(D_GENERAL, "%s: failed to resolve %s: %s",
+ __func__, junction, ops->jp_error(status));
+ return NULL;
+ }
+
+ status = ops->jp_get_locations(junction, &locations);
+ switch (status) {
+ case JP_OK:
+ break;
+ case JP_NOTJUNCTION:
+ xlog(D_GENERAL, "%s: %s is not a junction",
+ __func__, junction);
+ goto out;
+ default:
+ xlog(L_WARNING, "Dangling junction %s: %s",
+ junction, ops->jp_error(status));
+ goto out;
+ }
+
+ parent = lookup_parent_export(dom, junction, ai);
+ if (parent == NULL)
+ goto out;
+
+ exp = locations_to_export(ops, locations, junction, parent);
+
+ ops->jp_put_locations(locations);
+
+out:
+ ops->jp_done();
+ return exp;
+}
+
+/*
+ * Load the junction plug-in, then try to resolve "pathname".
+ * Returns pointer to an initialized exportent if "junction"
+ * refers to a junction, or NULL if not.
+ */
+static struct exportent *lookup_junction(char *dom, const char *pathname,
+ struct addrinfo *ai)
+{
+ struct exportent *exp;
+ struct link_map *map;
+ void *handle;
+
+ handle = dlopen("libnfsjunct.so", RTLD_NOW);
+ if (handle == NULL) {
+ xlog(D_GENERAL, "%s: dlopen: %s", __func__, dlerror());
+ return NULL;
+ }
+
+ if (dlinfo(handle, RTLD_DI_LINKMAP, &map) == 0)
+ xlog(D_GENERAL, "%s: loaded plug-in %s",
+ __func__, map->l_name);
+
+ (void)dlerror(); /* Clear any error */
+
+ exp = invoke_junction_ops(handle, dom, pathname, ai);
+
+ /* We could leave it loaded to make junction resolution
+ * faster next time. However, if we want to replace the
+ * library, that would require restarting mountd. */
+ (void)dlclose(handle);
+ return exp;
+}
+
+static void lookup_nonexport(FILE *f, char *dom, char *path,
+ struct addrinfo *ai)
+{
+ struct exportent *eep;
+
+ eep = lookup_junction(dom, path, ai);
+ dump_to_cache(f, dom, path, eep);
+ if (eep == NULL)
+ return;
+ exportent_release(eep);
+ free(eep);
+}
+#else /* !HAVE_NFS_PLUGIN_H */
+static void lookup_nonexport(FILE *f, char *dom, char *path,
+ struct addrinfo *UNUSED(ai))
+{
+ dump_to_cache(f, dom, path, NULL);
+}
+#endif /* !HAVE_NFS_PLUGIN_H */
+
+static void nfsd_export(FILE *f)
{
/* requests are:
* domain path
auth_reload();
- if (use_ipaddr) {
- struct addrinfo *tmp;
- tmp = host_pton(dom);
- if (tmp == NULL)
- goto out;
- ai = client_resolve(tmp->ai_addr);
- freeaddrinfo(tmp);
+ if (is_ipaddr_client(dom)) {
+ ai = lookup_client_addr(dom);
+ if (!ai)
goto out;
}
" or fsid= required", path);
dump_to_cache(f, dom, path, NULL);
}
- } else {
- dump_to_cache(f, dom, path, NULL);
- }
+ } else
+ lookup_nonexport(f, dom, path, ai);
+
out:
xlog(D_CALL, "nfsd_export: found %p path %s", found, path ? path : NULL);
if (dom) free(dom);
char *cache_name;
void (*cache_handle)(FILE *f);
FILE *f;
+ char vbuf[RPC_CHAN_BUF_SIZE];
} cachelist[] = {
- { "auth.unix.ip", auth_unix_ip},
- { "auth.unix.gid", auth_unix_gid},
- { "nfsd.export", nfsd_export},
- { "nfsd.fh", nfsd_fh},
- { NULL, NULL }
+ { "auth.unix.ip", auth_unix_ip, NULL, ""},
+ { "auth.unix.gid", auth_unix_gid, NULL, ""},
+ { "nfsd.export", nfsd_export, NULL, ""},
+ { "nfsd.fh", nfsd_fh, NULL, ""},
+ { NULL, NULL, NULL, ""}
};
extern int manage_gids;
+
+/**
+ * cache_open - prepare communications channels with kernel RPC caches
+ *
+ */
void cache_open(void)
{
int i;
continue;
sprintf(path, "/proc/net/rpc/%s/channel", cachelist[i].cache_name);
cachelist[i].f = fopen(path, "r+");
+ if (cachelist[i].f != NULL) {
+ setvbuf(cachelist[i].f, cachelist[i].vbuf, _IOLBF,
+ RPC_CHAN_BUF_SIZE);
+ }
}
}
+/**
+ * cache_set_fds - prepare cache file descriptors for one iteration of the service loop
+ * @fdset: pointer to fd_set to prepare
+ */
void cache_set_fds(fd_set *fdset)
{
int i;
}
}
+/**
+ * cache_process_req - process any active cache file descriptors during service loop iteration
+ * @fdset: pointer to fd_set to examine for activity
+ */
int cache_process_req(fd_set *readfds)
{
int i;
/*
* Give IP->domain and domain+path->options to kernel
- * % echo nfsd $IP $[now+30*60] $domain > /proc/net/rpc/auth.unix.ip/channel
- * % echo $domain $path $[now+30*60] $options $anonuid $anongid $fsid > /proc/net/rpc/nfsd.export/channel
+ * % echo nfsd $IP $[now+DEFAULT_TTL] $domain > /proc/net/rpc/auth.unix.ip/channel
+ * % echo $domain $path $[now+DEFAULT_TTL] $options $anonuid $anongid $fsid > /proc/net/rpc/nfsd.export/channel
*/
-int cache_export_ent(char *domain, struct exportent *exp, char *path)
+static int cache_export_ent(char *domain, struct exportent *exp, char *path)
{
int err;
FILE *f = fopen("/proc/net/rpc/nfsd.export/channel", "w");
* and export them with the same options
*/
struct stat stb;
- int l = strlen(exp->e_path);
- int dev;
+ size_t l = strlen(exp->e_path);
+ __dev_t dev;
if (strlen(path) <= l || path[l] != '/' ||
strncmp(exp->e_path, path, l) != 0)
return err;
}
+/**
+ * cache_export - Inform kernel of a new nfs_export
+ * @exp: target nfs_export
+ * @path: NUL-terminated C string containing export path
+ */
int cache_export(nfs_export *exp, char *path)
{
- char buf[INET_ADDRSTRLEN];
+ char buf[INET6_ADDRSTRLEN];
int err;
FILE *f;
qword_print(f, "nfsd");
- qword_print(f,
+ qword_print(f,
host_ntop(get_addrlist(exp->m_client, 0), buf, sizeof(buf)));
- qword_printint(f, time(0)+30*60);
+ qword_printtimefrom(f, exp->m_export.e_ttl);
qword_print(f, exp->m_client->m_hostname);
err = qword_eol(f);
return err;
}
-/* Get a filehandle.
+/**
+ * cache_get_filehandle - given an nfs_export, get its root filehandle
+ * @exp: target nfs_export
+ * @len: length of requested file handle
+ * @p: NUL-terminated C string containing export path
+ *
+ * Returns pointer to NFS file handle of root directory of export
+ *
* {
* echo $domain $path $length
* read filehandle <&0
fh.fh_size = qword_get(&bp, (char *)fh.fh_handle, NFS3_FHSIZE);
return &fh;
}
-
projects / nfs-utils.git / blobdiff