* and listen for requests (using my_svc_run)
*
*/
-#include "config.h"
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <sys/types.h>
#include <sys/select.h>
#include <sys/stat.h>
+#include <sys/vfs.h>
#include <time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
+#include <pwd.h>
+#include <grp.h>
+#include <mntent.h>
#include "misc.h"
#include "nfslib.h"
#include "exportfs.h"
#include "mountd.h"
#include "xmalloc.h"
+#include "fsloc.h"
+#include "pseudoflavors.h"
+
+#ifdef USE_BLKID
+#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,
+ FSID_NUM,
+ FSID_MAJOR_MINOR,
+ FSID_ENCODE_DEV,
+ FSID_UUID4_INUM,
+ FSID_UUID8,
+ FSID_UUID16,
+ FSID_UUID16_INUM,
+};
/*
* Support routines for text-based upcalls.
* Record is terminated with newline.
*
*/
-void cache_export_ent(char *domain, struct exportent *exp);
+static int cache_export_ent(char *domain, struct exportent *exp, char *p);
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 *client;
- struct in_addr addr;
+ char ipaddr[INET6_ADDRSTRLEN];
+ char *client = NULL;
+ struct addrinfo *tmp = NULL;
+ struct addrinfo *ai = NULL;
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
+ xlog(D_CALL, "auth_unix_ip: inbuf '%s'", lbuf);
+
cp = lbuf;
if (qword_get(&cp, class, 20) <= 0 ||
strcmp(class, "nfsd") != 0)
return;
- if (qword_get(&cp, ipaddr, 20) <= 0)
+ if (qword_get(&cp, ipaddr, sizeof(ipaddr)) <= 0)
return;
- if (inet_aton(ipaddr, &addr)==0)
+ tmp = host_pton(ipaddr);
+ if (tmp == NULL)
return;
+ auth_reload();
+
/* addr is a valid, interesting address, find the domain name... */
- client = client_compose(addr);
+ if (!use_ipaddr) {
+ ai = client_resolve(tmp->ai_addr);
+ client = client_compose(ai);
+ freeaddrinfo(ai);
+ }
+ freeaddrinfo(tmp);
-
qword_print(f, "nfsd");
qword_print(f, ipaddr);
qword_printint(f, time(0)+30*60);
- if (client)
+ if (use_ipaddr)
+ qword_print(f, ipaddr);
+ else if (client)
qword_print(f, *client?client:"DEFAULT");
qword_eol(f);
+ xlog(D_CALL, "auth_unix_ip: client %p '%s'", client, client?client: "DEFAULT");
+
+ free(client);
+}
+
+static void auth_unix_gid(FILE *f)
+{
+ /* Request are
+ * uid
+ * reply is
+ * uid expiry count list of group ids
+ */
+ uid_t uid;
+ struct passwd *pw;
+ gid_t glist[100], *groups = glist;
+ int ngroups = 100;
+ int rv, i;
+ char *cp;
+
+ if (readline(fileno(f), &lbuf, &lbuflen) != 1)
+ return;
+
+ cp = lbuf;
+ if (qword_get_uint(&cp, &uid) != 0)
+ return;
+
+ pw = getpwuid(uid);
+ if (!pw)
+ 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)
+ rv = -1;
+ else
+ rv = getgrouplist(pw->pw_name, pw->pw_gid,
+ groups, &ngroups);
+ }
+ }
+ qword_printuint(f, uid);
+ qword_printuint(f, time(0)+30*60);
+ if (rv >= 0) {
+ qword_printuint(f, ngroups);
+ for (i=0; i<ngroups; i++)
+ qword_printuint(f, groups[i]);
+ } else
+ qword_printuint(f, 0);
+ qword_eol(f);
- if (client && strcmp(ipaddr, client))
- mountlist_add(ipaddr, *client?client:"DEFAULT");
+ if (groups != glist)
+ free(groups);
+}
- if (client) free(client);
+#if USE_BLKID
+static const char *get_uuid_blkdev(char *path)
+{
+ /* We set *safe if we know that we need the
+ * fsid from statfs too.
+ */
+ static blkid_cache cache = NULL;
+ struct stat stb;
+ char *devname;
+ blkid_tag_iterate iter;
+ blkid_dev dev;
+ const char *type;
+ const char *val, *uuid = NULL;
+
+ if (cache == NULL)
+ blkid_get_cache(&cache, NULL);
+
+ if (stat(path, &stb) != 0)
+ return NULL;
+ devname = blkid_devno_to_devname(stb.st_dev);
+ if (!devname)
+ return NULL;
+ dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
+ free(devname);
+ if (!dev)
+ return NULL;
+ iter = blkid_tag_iterate_begin(dev);
+ if (!iter)
+ return NULL;
+ while (blkid_tag_next(iter, &type, &val) == 0) {
+ if (strcmp(type, "UUID") == 0)
+ uuid = val;
+ if (strcmp(type, "TYPE") == 0 &&
+ strcmp(val, "btrfs") == 0) {
+ uuid = NULL;
+ break;
+ }
+ }
+ blkid_tag_iterate_end(iter);
+ return uuid;
+}
+#else
+#define get_uuid_blkdev(path) (NULL)
+#endif
+
+static int get_uuid(const char *val, int 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;
+ memset(u, 0, uuidlen);
+ for ( ; *val ; val++) {
+ char c = *val;
+ if (!isxdigit(c))
+ continue;
+ if (isalpha(c)) {
+ if (isupper(c))
+ c = c - 'A' + 10;
+ else
+ c = c - 'a' + 10;
+ } else
+ c = c - '0' + 0;
+ if ((i&1) == 0)
+ c <<= 4;
+ u[i/2] ^= c;
+ i++;
+ if (i == uuidlen*2)
+ i = 0;
+ }
+ return 1;
+}
+
+static int uuid_by_path(char *path, int type, int uuidlen, char *uuid)
+{
+ /* get a uuid for the filesystem found at 'path'.
+ * There are several possible ways of generating the
+ * uuids (types).
+ * Type 0 is used for new filehandles, while other types
+ * may be used to interpret old filehandle - to ensure smooth
+ * forward migration.
+ * We return 1 if a uuid was found (and it might be worth
+ * trying the next type) or 0 if no more uuid types can be
+ * extracted.
+ */
+
+ /* Possible sources of uuid are
+ * - blkid uuid
+ * - statfs64 uuid
+ *
+ * On some filesystems (e.g. vfat) the statfs64 uuid is simply an
+ * encoding of the device that the filesystem is mounted from, so
+ * it we be very bad to use that (as device numbers change). blkid
+ * must be preferred.
+ * On other filesystems (e.g. btrfs) the statfs64 uuid contains
+ * important info that the blkid uuid cannot contain: This happens
+ * when multiple subvolumes are exported (they have the same
+ * blkid uuid but different statfs64 uuids).
+ * We rely on get_uuid_blkdev *knowing* which is which and not returning
+ * a uuid for filesystems where the statfs64 uuid is better.
+ *
+ */
+ struct statfs64 st;
+ char fsid_val[17];
+ const char *blkid_val;
+ const char *val;
+
+ blkid_val = get_uuid_blkdev(path);
+
+ if (statfs64(path, &st) == 0 &&
+ (st.f_fsid.__val[0] || st.f_fsid.__val[1]))
+ snprintf(fsid_val, 17, "%08x%08x",
+ st.f_fsid.__val[0], st.f_fsid.__val[1]);
+ else
+ fsid_val[0] = 0;
+
+ if (blkid_val && (type--) == 0)
+ val = blkid_val;
+ else if (fsid_val[0] && (type--) == 0)
+ val = fsid_val;
+ else
+ return 0;
+
+ get_uuid(val, uuidlen, uuid);
+ return 1;
+}
+
+/* Iterate through /etc/mtab, finding mountpoints
+ * at or below a given path
+ */
+static char *next_mnt(void **v, char *p)
+{
+ FILE *f;
+ struct mntent *me;
+ int l = strlen(p);
+ if (*v == NULL) {
+ f = setmntent("/etc/mtab", "r");
+ *v = f;
+ } else
+ f = *v;
+ while ((me = getmntent(f)) != NULL &&
+ (strncmp(me->mnt_dir, p, l) != 0 ||
+ me->mnt_dir[l] != '/'))
+ ;
+ if (me == NULL) {
+ endmntent(f);
+ *v = NULL;
+ return NULL;
+ }
+ return me->mnt_dir;
}
-void nfsd_fh(FILE *f)
+static void nfsd_fh(FILE *f)
{
/* request are:
* domain fsidtype fsid
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;
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
- cp = lbuf;
+ xlog(D_CALL, "nfsd_fh: inbuf '%s'", lbuf);
+ cp = lbuf;
+
dom = malloc(strlen(cp));
if (dom == NULL)
return;
goto out;
if (qword_get_int(&cp, &fsidtype) != 0)
goto out;
- if (fsidtype < 0 || fsidtype > 1)
+ if (fsidtype < 0 || fsidtype > 7)
goto out; /* unknown type */
if ((fsidlen = qword_get(&cp, fsid, 32)) <= 0)
goto out;
switch(fsidtype) {
- case 0: /* 4 bytes: 2 major, 2 minor, 4 inode */
+ case FSID_DEV: /* 4 bytes: 2 major, 2 minor, 4 inode */
if (fsidlen != 8)
goto out;
memcpy(&dev, fsid, 4);
minor = ntohl(dev) & 0xFFFF;
break;
- case 1: /* 4 bytes - fsid */
+ case FSID_NUM: /* 4 bytes - fsid */
if (fsidlen != 4)
goto out;
memcpy(&fsidnum, fsid, 4);
break;
+
+ case FSID_MAJOR_MINOR: /* 12 bytes: 4 major, 4 minor, 4 inode
+ * This format is never actually used but was
+ * 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);
+ break;
+
+ case FSID_ENCODE_DEV: /* 8 bytes: 4 byte packed device number, 4 inode */
+ /* This is *host* endian, not net-byte-order, because
+ * no-one outside this host has any business interpreting it
+ */
+ if (fsidlen != 8)
+ goto out;
+ memcpy(&dev, fsid, 4);
+ memcpy(&inode, fsid+4, 4);
+ major = (dev & 0xfff00) >> 8;
+ 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;
+ break;
+ case FSID_UUID8: /* 8 byte uuid */
+ if (fsidlen != 8)
+ goto out;
+ uuidlen = 8;
+ fhuuid = fsid;
+ break;
+ case FSID_UUID16: /* 16 byte uuid */
+ if (fsidlen != 16)
+ goto out;
+ uuidlen = 16;
+ fhuuid = fsid;
+ break;
+ case FSID_UUID16_INUM: /* 8 byte inode number and 16 byte uuid */
+ if (fsidlen != 24)
+ goto out;
+ memcpy(&inode64, fsid, 8);
+ inode = inode64;
+ uuidlen = 16;
+ fhuuid = fsid+8;
+ break;
}
+ auth_reload();
+
/* Now determine export point for this fsid/domain */
for (i=0 ; i < MCL_MAXTYPES; i++) {
- for (exp = exportlist[i]; exp; exp = exp->m_next) {
- if (!client_member(dom, exp->m_client->m_hostname))
+ 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;
+ static void *mnt = NULL;
+
+ if (prev == exp) {
+ /* try a submount */
+ path = next_mnt(&mnt, exp->m_export.e_path);
+ if (!path) {
+ next_exp = exp->m_next;
+ prev = NULL;
+ continue;
+ }
+ next_exp = exp;
+ } else {
+ prev = exp;
+ mnt = NULL;
+ path = exp->m_export.e_path;
+ next_exp = exp;
+ }
+ } else {
+ path = exp->m_export.e_path;
+ next_exp = exp->m_next;
+ }
+
+ if (!use_ipaddr && !client_member(dom, exp->m_client->m_hostname))
continue;
- if (fsidtype == 1 &&
- ((exp->m_export.e_flags & NFSEXP_FSID) == 0 ||
- exp->m_export.e_fsid != fsidnum))
+ 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)
continue;
- if (fsidtype == 0) {
- struct stat stb;
- 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(exp->m_export.e_path, &stb) != 0)
- continue;
+ if (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) {
+ 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) {
found = &exp->m_export;
- else if (strcmp(found->e_path, exp->m_export.e_path)!= 0)
+ found_path = strdup(path);
+ if (found_path == NULL)
+ goto out;
+ } else if (strcmp(found->e_path, exp->m_export.e_path)!= 0)
{
xlog(L_WARNING, "%s and %s have same filehandle for %s, using first",
- found->e_path, exp->m_export.e_path, dom);
+ found_path, path, dom);
}
}
}
}
if (found)
- cache_export_ent(dom, found);
+ if (cache_export_ent(dom, found, found_path) < 0)
+ found = 0;
qword_print(f, dom);
qword_printint(f, fsidtype);
qword_printhex(f, fsid, fsidlen);
- qword_printint(f, time(0)+30*60);
+ /* The fsid -> path lookup can be quite expensive as it
+ * potentially stats and reads lots of devices, and some of those
+ * might have spun-down. The Answer is not likely to
+ * change underneath us, and an 'exportfs -f' can always
+ * remove this from the kernel, so use a really log
+ * timeout. Maybe this should be configurable on the command
+ * line.
+ */
+ qword_printint(f, 0x7fffffff);
if (found)
- qword_print(f, found->e_path);
+ qword_print(f, found_path);
qword_eol(f);
out:
+ if (found_path)
+ free(found_path);
+ freeaddrinfo(ai);
free(dom);
+ xlog(D_CALL, "nfsd_fh: found %p path %s", found, found ? found->e_path : NULL);
return;
}
-void nfsd_export(FILE *f)
+static void write_fsloc(FILE *f, struct exportent *ep)
+{
+ struct servers *servers;
+
+ if (ep->e_fslocmethod == FSLOC_NONE)
+ return;
+
+ servers = replicas_lookup(ep->e_fslocmethod, ep->e_fslocdata);
+ if (!servers)
+ return;
+ qword_print(f, "fsloc");
+ qword_printint(f, servers->h_num);
+ if (servers->h_num >= 0) {
+ int i;
+ for (i=0; i<servers->h_num; i++) {
+ qword_print(f, servers->h_mp[i]->h_host);
+ qword_print(f, servers->h_mp[i]->h_path);
+ }
+ }
+ qword_printint(f, servers->h_referral);
+ release_replicas(servers);
+}
+
+static void write_secinfo(FILE *f, struct exportent *ep, int flag_mask)
+{
+ struct sec_entry *p;
+
+ for (p = ep->e_secinfo; p->flav; p++)
+ ; /* Do nothing */
+ if (p == ep->e_secinfo) {
+ /* There was no sec= option */
+ return;
+ }
+ qword_print(f, "secinfo");
+ qword_printint(f, p - ep->e_secinfo);
+ for (p = ep->e_secinfo; p->flav; p++) {
+ qword_printint(f, p->flav->fnum);
+ qword_printint(f, p->flags & flag_mask);
+ }
+
+}
+
+static int dump_to_cache(FILE *f, char *domain, char *path, struct exportent *exp)
+{
+ 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_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);
+ write_secinfo(f, exp, flag_mask);
+ if (exp->e_uuid == NULL || different_fs) {
+ char u[16];
+ if (uuid_by_path(path, 0, 16, u)) {
+ qword_print(f, "uuid");
+ qword_printhex(f, u, 16);
+ }
+ } else {
+ char u[16];
+ get_uuid(exp->e_uuid, 16, u);
+ qword_print(f, "uuid");
+ qword_printhex(f, u, 16);
+ }
+ }
+ 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)
+{
+ nfs_export *exp;
+ nfs_export *found = NULL;
+ int found_type = 0;
+ int i;
+
+ for (i=0 ; i < MCL_MAXTYPES; i++) {
+ for (exp = exportlist[i].p_head; exp; exp = exp->m_next) {
+ if (!export_matches(exp, dom, path, ai))
+ continue;
+ if (!found) {
+ found = exp;
+ found_type = i;
+ continue;
+ }
+
+ /* Always prefer non-V4ROOT mounts */
+ if (found->m_export.e_flags & NFSEXP_V4ROOT)
+ continue;
+
+ /* If one is a CROSSMOUNT, then prefer the longest path */
+ if (((found->m_export.e_flags & NFSEXP_CROSSMOUNT) ||
+ (exp->m_export.e_flags & NFSEXP_CROSSMOUNT)) &&
+ strlen(found->m_export.e_path) !=
+ strlen(exp->m_export.e_path)) {
+
+ if (strlen(exp->m_export.e_path) >
+ strlen(found->m_export.e_path)) {
+ found = exp;
+ found_type = i;
+ }
+ continue;
+
+ } else if (found_type == i && found->m_warned == 0) {
+ xlog(L_WARNING, "%s exported to both %s and %s, "
+ "arbitrarily choosing options from first",
+ path, found->m_client->m_hostname, exp->m_client->m_hostname,
+ dom);
+ found->m_warned = 1;
+ }
+ }
+ }
+ return found;
+}
+
+static void nfsd_export(FILE *f)
{
/* requests are:
* domain path
*/
char *cp;
- int i;
char *dom, *path;
- nfs_export *exp, *found = NULL;
-
+ nfs_export *found = NULL;
+ struct addrinfo *ai = NULL;
if (readline(fileno(f), &lbuf, &lbuflen) != 1)
return;
+ xlog(D_CALL, "nfsd_export: inbuf '%s'", lbuf);
+
cp = lbuf;
dom = malloc(strlen(cp));
path = malloc(strlen(cp));
if (qword_get(&cp, path, strlen(lbuf)) <= 0)
goto out;
- /* now find flags for this export point in this domain */
- for (i=0 ; i < MCL_MAXTYPES; i++) {
- for (exp = exportlist[i]; exp; exp = exp->m_next) {
- if (!client_member(dom, exp->m_client->m_hostname))
- continue;
- if (strcmp(path, exp->m_export.e_path))
- continue;
- if (!found)
- found = exp;
- else {
- xlog(L_WARNING, "%s exported to both %s and %s in %s",
- path, exp->m_client->m_hostname, found->m_client->m_hostname,
- dom);
- }
- }
+ 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);
+ goto out;
}
- qword_print(f, dom);
- qword_print(f, path);
- qword_printint(f, time(0)+30*60);
+ found = lookup_export(dom, path, ai);
+
if (found) {
- qword_printint(f, found->m_export.e_flags);
- qword_printint(f, found->m_export.e_anonuid);
- qword_printint(f, found->m_export.e_anongid);
- qword_printint(f, found->m_export.e_fsid);
- mountlist_add(dom, path);
+ if (dump_to_cache(f, dom, path, &found->m_export) < 0) {
+ xlog(L_WARNING,
+ "Cannot export %s, possibly unsupported filesystem"
+ " or fsid= required", path);
+ dump_to_cache(f, dom, path, NULL);
+ }
+ } else {
+ dump_to_cache(f, dom, path, NULL);
}
- qword_eol(f);
out:
+ xlog(D_CALL, "nfsd_export: found %p path %s", found, path ? path : NULL);
if (dom) free(dom);
if (path) free(path);
+ freeaddrinfo(ai);
}
void (*cache_handle)(FILE *f);
FILE *f;
} cachelist[] = {
- { "auth.unix.ip", auth_unix_ip},
- { "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;
- for (i=0; cachelist[i].cache_name; i++ ){
+ for (i=0; cachelist[i].cache_name; i++ ) {
char path[100];
+ if (!manage_gids && cachelist[i].cache_handle == auth_unix_gid)
+ continue;
sprintf(path, "/proc/net/rpc/%s/channel", cachelist[i].cache_name);
cachelist[i].f = fopen(path, "r+");
}
}
+/**
+ * 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;
FD_ISSET(fileno(cachelist[i].f), readfds)) {
cnt++;
cachelist[i].cache_handle(cachelist[i].f);
+ FD_CLR(fileno(cachelist[i].f), readfds);
}
}
return cnt;
* % echo $domain $path $[now+30*60] $options $anonuid $anongid $fsid > /proc/net/rpc/nfsd.export/channel
*/
-void cache_export_ent(char *domain, struct exportent *exp)
+static int cache_export_ent(char *domain, struct exportent *exp, char *path)
{
-
+ int err;
FILE *f = fopen("/proc/net/rpc/nfsd.export/channel", "w");
if (!f)
- return;
+ return -1;
- qword_print(f, domain);
- qword_print(f, exp->e_path);
- qword_printint(f, time(0)+30*60);
- qword_printint(f, exp->e_flags);
- qword_printint(f, exp->e_anonuid);
- qword_printint(f, exp->e_anongid);
- qword_printint(f, exp->e_fsid);
- qword_eol(f);
+ err = dump_to_cache(f, domain, exp->e_path, exp);
+ if (err) {
+ xlog(L_WARNING,
+ "Cannot export %s, possibly unsupported filesystem or"
+ " fsid= required", exp->e_path);
+ }
- fclose(f);
+ while (err == 0 && (exp->e_flags & NFSEXP_CROSSMOUNT) && path) {
+ /* really an 'if', but we can break out of
+ * a 'while' more easily */
+ /* Look along 'path' for other filesystems
+ * and export them with the same options
+ */
+ struct stat stb;
+ size_t l = strlen(exp->e_path);
+ __dev_t dev;
+
+ if (strlen(path) <= l || path[l] != '/' ||
+ strncmp(exp->e_path, path, l) != 0)
+ break;
+ if (stat(exp->e_path, &stb) != 0)
+ break;
+ dev = stb.st_dev;
+ while(path[l] == '/') {
+ char c;
+ /* errors for submount should fail whole filesystem */
+ int err2;
+
+ l++;
+ while (path[l] != '/' && path[l])
+ l++;
+ c = path[l];
+ path[l] = 0;
+ err2 = lstat(path, &stb);
+ path[l] = c;
+ if (err2 < 0)
+ break;
+ if (stb.st_dev == dev)
+ continue;
+ dev = stb.st_dev;
+ path[l] = 0;
+ dump_to_cache(f, domain, path, exp);
+ path[l] = c;
+ }
+ break;
+ }
- mountlist_add(domain, exp->e_path);
+ fclose(f);
+ return err;
}
-void cache_export(nfs_export *exp)
+/**
+ * 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[INET6_ADDRSTRLEN];
+ int err;
FILE *f;
f = fopen("/proc/net/rpc/auth.unix.ip/channel", "w");
if (!f)
- return;
+ return -1;
+
qword_print(f, "nfsd");
- qword_print(f, inet_ntoa(exp->m_client->m_addrlist[0]));
+ qword_print(f,
+ host_ntop(get_addrlist(exp->m_client, 0), buf, sizeof(buf)));
qword_printint(f, time(0)+30*60);
qword_print(f, exp->m_client->m_hostname);
- qword_eol(f);
+ err = qword_eol(f);
fclose(f);
- if (strcmp(inet_ntoa(exp->m_client->m_addrlist[0]), exp->m_client->m_hostname))
- mountlist_add(inet_ntoa(exp->m_client->m_addrlist[0]), exp->m_client->m_hostname);
-
- cache_export_ent(exp->m_client->m_hostname, &exp->m_export);
+ err = cache_export_ent(exp->m_client->m_hostname, &exp->m_export, path)
+ || err;
+ 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
FILE *f = fopen("/proc/fs/nfsd/filehandle", "r+");
char buf[200];
char *bp = buf;
+ int failed;
static struct nfs_fh_len fh;
if (!f)
qword_print(f, exp->m_client->m_hostname);
qword_print(f, p);
qword_printint(f, len);
- qword_eol(f);
+ failed = qword_eol(f);
- if (fgets(buf, sizeof(buf), f) == NULL)
+ if (!failed)
+ failed = (fgets(buf, sizeof(buf), f) == NULL);
+ fclose(f);
+ if (failed)
return NULL;
memset(fh.fh_handle, 0, sizeof(fh.fh_handle));
- fh.fh_size = qword_get(&bp, fh.fh_handle, NFS3_FHSIZE);
+ fh.fh_size = qword_get(&bp, (char *)fh.fh_handle, NFS3_FHSIZE);
return &fh;
}
-
projects / nfs-utils.git / blobdiff