#include "stropts.h"
#include "error.h"
#include "network.h"
+#include "parse_opt.h"
#ifdef HAVE_RPCSVC_NFS_PROT_H
#include <rpcsvc/nfs_prot.h>
#define NFS_PORT 2049
#endif
+#ifndef NFS_MAXHOSTNAME
+#define NFS_MAXHOSTNAME (255)
+#endif
+
+#ifndef NFS_MAXPATHNAME
+#define NFS_MAXPATHNAME (1024)
+#endif
+
extern int nfs_mount_data_version;
extern char *progname;
extern int verbose;
static int addr_opt = 0;
static int ca_opt = 0;
-static int parse_devname(char *hostdir, char **hostname, char **dirname)
+static int parse_devname(const char *spec, char **hostname)
{
- char *s;
+ int ret = 0;
+ char *dev, *pathname, *s;
+
+ dev = xstrdup(spec);
- if (!(s = strchr(hostdir, ':'))) {
- nfs_error(_("%s: directory to mount not in host:dir format"),
+ if (!(pathname = strchr(dev, ':'))) {
+ nfs_error(_("%s: remote share not in 'host:dir' format"),
progname);
- return -1;
+ goto out;
}
- *hostname = hostdir;
- *dirname = s + 1;
- *s = '\0';
- /* Ignore all but first hostname in replicated mounts
- until they can be fully supported. (mack@sgi.com) */
- if ((s = strchr(hostdir, ','))) {
+ *pathname = '\0';
+ pathname++;
+
+ /*
+ * We don't need a copy of the pathname, but let's
+ * sanity check it anyway.
+ */
+ if (strlen(pathname) > NFS_MAXPATHNAME) {
+ nfs_error(_("%s: export pathname is too long"),
+ progname);
+ goto out;
+ }
+
+ /*
+ * Ignore all but first hostname in replicated mounts
+ * until they can be fully supported. (mack@sgi.com)
+ */
+ if ((s = strchr(dev, ','))) {
*s = '\0';
nfs_error(_("%s: warning: multiple hostnames not supported"),
progname);
+ nfs_error(_("%s: ignoring hostnames that follow the first one"),
+ progname);
}
- return 0;
+ *hostname = xstrdup(dev);
+ if (strlen(*hostname) > NFS_MAXHOSTNAME) {
+ nfs_error(_("%s: server hostname is too long"),
+ progname);
+ free(*hostname);
+ goto out;
+ }
+
+ ret = 1;
+
+out:
+ free(dev);
+ return ret;
}
static int fill_ipv4_sockaddr(const char *hostname, struct sockaddr_in *addr)
return 1;
}
-/*
- * XXX: This should really use the technique neil recently added
- * to get the address off the local end of a socket connected to
- * the server -- to get the right address to use on multi-homed
- * clients
- */
-static int get_my_ipv4addr(char *ip_addr, int len)
-{
- char myname[1024];
- struct sockaddr_in myaddr;
-
- if (gethostname(myname, sizeof(myname))) {
- nfs_error(_("%s: can't determine client address\n"),
- progname);
- return 0;
- }
- if (!fill_ipv4_sockaddr(myname, &myaddr))
- return 0;
-
- snprintf(ip_addr, len, "%s", inet_ntoa(myaddr.sin_addr));
- ip_addr[len - 1] = '\0';
-
- return 1;
-}
-
/*
* Walk through our mount options string, and indicate the presence
* of 'bg', 'retry=', 'addr=', and 'clientaddr='.
}
/*
- * Append the 'addr=' option to the options string.
+ * Append the 'addr=' option to the options string. The server
+ * address is added to /etc/mtab for use when unmounting.
*
* Returns 1 if 'addr=' option created successfully;
* otherwise zero.
*/
-static int append_addr_opt(const char *spec, char **extra_opts)
+static int append_addr_opt(struct sockaddr_in *saddr, char **extra_opts)
{
- static char hostdir[1024], new_opts[1024];
- char *hostname, *dirname, *s, *old_opts;
- struct sockaddr_in addr;
-
- if (strlen(spec) >= sizeof(hostdir)) {
- nfs_error(_("%s: excessively long host:dir argument\n"),
- progname);
- return 0;
- }
- strcpy(hostdir, spec);
- if (parse_devname(hostdir, &hostname, &dirname)) {
- nfs_error(_("%s: parsing host:dir argument failed\n"),
- progname);
- return 0;
- }
-
- if (!fill_ipv4_sockaddr(hostname, &addr))
- return 0;
+ static char new_opts[1024];
+ char *s, *old_opts;
- /* add IP address to mtab options for use when unmounting */
- s = inet_ntoa(addr.sin_addr);
+ s = inet_ntoa(saddr->sin_addr);
old_opts = *extra_opts;
if (!old_opts)
old_opts = "";
if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
- nfs_error(_("%s: excessively long option argument\n"),
+ nfs_error(_("%s: too many mount options\n"),
progname);
return 0;
}
}
/*
- * Append the 'clientaddr=' option to the options string.
+ * Called if no 'clientaddr=' option was specified in the options string
+ * to discover our address and append an appropriate 'clientaddr=' option
+ * to the options string.
*
* Returns 1 if 'clientaddr=' option created successfully;
* otherwise zero.
*/
-static int append_clientaddr_opt(const char *spec, char **extra_opts)
+static int append_clientaddr_opt(struct sockaddr_in *saddr, char **extra_opts)
{
- static char new_opts[1024], cbuf[1024];
- static char ip_addr[16] = "127.0.0.1";
+ static char new_opts[2048], cbuf[256];
+ struct sockaddr_in my_addr;
- if (!get_my_ipv4addr(ip_addr, sizeof(ip_addr)))
+ if (!get_client_address(saddr, &my_addr))
return 0;
- /* Ensure we have enough padding for the following strcat()s */
- if (strlen(*extra_opts) + strlen(ip_addr) + 10 >= sizeof(new_opts)) {
- nfs_error(_("%s: excessively long option argument"),
+ if (strlen(*extra_opts) + 30 >= sizeof(new_opts)) {
+ nfs_error(_("%s: too many mount options"),
progname);
return 0;
}
strcat(new_opts, *extra_opts);
snprintf(cbuf, sizeof(cbuf) - 1, "%sclientaddr=%s",
- *extra_opts ? "," : "", ip_addr);
+ *extra_opts ? "," : "", inet_ntoa(my_addr.sin_addr));
+
strcat(new_opts, cbuf);
*extra_opts = xstrdup(new_opts);
return 1;
}
+/*
+ * Append the 'addr=' option to the options string to pass a resolved
+ * server address to the kernel. After a successful mount, this address
+ * is also added to /etc/mtab for use when unmounting.
+ *
+ * If 'addr=' is already present, we strip it out. This prevents users
+ * from setting a bogus 'addr=' option themselves, and also allows bg
+ * retries to recompute the server's address, in case it has changed.
+ *
+ * Returns 1 if 'addr=' option appended successfully;
+ * otherwise zero.
+ */
+static int append_addr_option(struct sockaddr_in *saddr,
+ struct mount_options *options)
+{
+ char new_option[24];
+
+ po_remove_all(options, "addr");
+
+ snprintf(new_option, sizeof(new_option) - 1,
+ "addr=%s", inet_ntoa(saddr->sin_addr));
+
+ if (po_append(options, new_option) == PO_SUCCEEDED)
+ return 1;
+ return 0;
+}
+
+/*
+ * Called to discover our address and append an appropriate 'clientaddr='
+ * option to the options string.
+ *
+ * Returns 1 if 'clientaddr=' option created successfully or if
+ * 'clientaddr=' option is already present; otherwise zero.
+ */
+static int append_clientaddr_option(struct sockaddr_in *saddr,
+ struct mount_options *options)
+{
+ struct sockaddr_in my_addr;
+ char new_option[32];
+
+ if (po_contains(options, "clientaddr") == PO_SUCCEEDED)
+ return 1;
+
+ if (!get_client_address(saddr, &my_addr))
+ return 0;
+
+ snprintf(new_option, sizeof(new_option) - 1,
+ "clientaddr=%s", inet_ntoa(my_addr.sin_addr));
+
+ if (po_append(options, new_option) == PO_SUCCEEDED)
+ return 1;
+ return 0;
+}
+
/*
* nfsmount_s - Mount an NFSv2 or v3 file system using C string options
*
* @extra_opts: pointer to C string containing fs-specific mount options
* (possibly also a return argument)
* @fake: flag indicating whether to carry out the whole operation
- * @bg: one if this is a backgrounded mount attempt
+ * @child: one if this is a backgrounded mount
*
* XXX: need to handle bg, fg, and retry options.
*/
int nfsmount_s(const char *spec, const char *node, int flags,
- char **extra_opts, int fake, int bg)
+ char **extra_opts, int fake, int child)
{
- int retval = EX_FAIL;
+ struct sockaddr_in saddr;
+ char *hostname;
+ int err;
+
+ if (!parse_devname(spec, &hostname))
+ return EX_FAIL;
+ err = fill_ipv4_sockaddr(hostname, &saddr);
+ free(hostname);
+ if (!err)
+ return EX_FAIL;
extract_interesting_options(*extra_opts);
- if (!bg && addr_opt) {
+ if (!child && addr_opt) {
nfs_error(_("%s: Illegal option: 'addr='"), progname);
- goto fail;
+ return EX_FAIL;
}
- if (!append_addr_opt(spec, extra_opts))
- goto fail;
+ if (!append_addr_opt(&saddr, extra_opts))
+ return EX_FAIL;
if (verbose)
printf(_("%s: text-based options: '%s'\n"),
if (mount(spec, node, "nfs",
flags & ~(MS_USER|MS_USERS), *extra_opts)) {
mount_error(spec, node, errno);
- goto fail;
+ return EX_FAIL;
}
}
- return 0;
-
-fail:
- return retval;
+ return EX_SUCCESS;
}
/*
int nfs4mount_s(const char *spec, const char *node, int flags,
char **extra_opts, int fake, int child)
{
- int retval = EX_FAIL;
+ struct sockaddr_in saddr;
+ char *hostname;
+ int err;
+
+ if (!parse_devname(spec, &hostname))
+ return EX_FAIL;
+ err = fill_ipv4_sockaddr(hostname, &saddr);
+ free(hostname);
+ if (!err)
+ return EX_FAIL;
extract_interesting_options(*extra_opts);
if (addr_opt) {
nfs_error(_("%s: Illegal option: 'addr='"), progname);
- goto fail;
+ return EX_FAIL;
}
- if (ca_opt) {
- nfs_error(_("%s: Illegal option: 'clientaddr='"), progname);
- goto fail;
- }
-
- if (!append_addr_opt(spec, extra_opts))
- goto fail;
+ if (!append_addr_opt(&saddr, extra_opts))
+ return EX_FAIL;
- if (!append_clientaddr_opt(spec, extra_opts))
- goto fail;
+ if (!ca_opt && !append_clientaddr_opt(&saddr, extra_opts))
+ return EX_FAIL;
if (verbose)
printf(_("%s: text-based options: '%s'\n"),
if (mount(spec, node, "nfs4",
flags & ~(MS_USER|MS_USERS), *extra_opts)) {
mount_error(spec, node, errno);
- goto fail;
+ return EX_FAIL;
}
}
- return 0;
-
-fail:
- return retval;
+ return EX_SUCCESS;
}
projects / nfs-utils.git / blobdiff