/*
* Convert the passed-in sockaddr-style address to presentation
* format, then append an option of the form "keyword=address".
*
* Returns 1 if the option was appended successfully; otherwise zero.
*/
static int nfs_append_generic_address_option(const struct sockaddr *sap,
const socklen_t salen,
const char *keyword,
struct mount_options *options)
{
char address[NI_MAXHOST];
char new_option[512];
int len;
if (!nfs_present_sockaddr(sap, salen, address, sizeof(address)))
goto out_err;
len = snprintf(new_option, sizeof(new_option), "%s=%s",
keyword, address);
if (len < 0 || (size_t)len >= sizeof(new_option))
goto out_err;
if (po_append(options, new_option) != PO_SUCCEEDED)
goto out_err;
return 1;
out_err:
nfs_error(_("%s: failed to construct %s option"), progname, keyword);
return 0;
}
static int nfs_do_mount_v4(struct nfsmount_info *mi,
struct sockaddr *sap, socklen_t salen)
{
struct mount_options *options = po_dup(mi->options);
int result = 0;
if (!options) {
errno = ENOMEM;
return result;
}
if (mi->version == 0) {
if (po_contains(options, "mounthost") ||
po_contains(options, "mountaddr") ||
po_contains(options, "mountvers") ||
po_contains(options, "mountproto")) {
/*
* Since these mountd options are set assume version 3
* is wanted so error out with EPROTONOSUPPORT so the
* protocol negation starts with v3.
*/
errno = EPROTONOSUPPORT;
goto out_fail;
}
if (po_append(options, "vers=4") == PO_FAILED) {
errno = EINVAL;
goto out_fail;
}
}
if (!nfs_append_addr_option(sap, salen, options)) {
errno = EINVAL;
goto out_fail;
}
if (!nfs_append_clientaddr_option(sap, salen, options)) {
errno = EINVAL;
goto out_fail;
}
/*
* Update option string to be recorded in /etc/mtab.
*/
if (po_join(options, mi->extra_opts) == PO_FAILED) {
errno = ENOMEM;
goto out_fail;
}
if (verbose)
printf(_("%s: trying text-based options '%s'\n"),
progname, *mi->extra_opts);
result = nfs_sys_mount(mi, options);
out_fail:
po_destroy(options);
return result;
}
static int nfs_append_sloppy_option(struct mount_options *options)
{
if (!sloppy || linux_version_code() < MAKE_VERSION(2, 6, 27))
return 1;
if (po_append(options, "sloppy") == PO_FAILED)
return 0;
return 1;
}
static int nfs_construct_new_options(struct mount_options *options,
struct sockaddr *nfs_saddr,
struct pmap *nfs_pmap,
struct sockaddr *mnt_saddr,
struct pmap *mnt_pmap)
{
char new_option[64];
char *netid;
po_remove_all(options, "nfsprog");
po_remove_all(options, "mountprog");
po_remove_all(options, "v2");
po_remove_all(options, "v3");
po_remove_all(options, "vers");
po_remove_all(options, "nfsvers");
snprintf(new_option, sizeof(new_option) - 1,
"vers=%lu", nfs_pmap->pm_vers);
if (po_append(options, new_option) == PO_FAILED)
return 0;
po_remove_all(options, "proto");
po_remove_all(options, "udp");
po_remove_all(options, "tcp");
netid = nfs_get_netid(nfs_saddr->sa_family, nfs_pmap->pm_prot);
if (netid == NULL)
return 0;
snprintf(new_option, sizeof(new_option) - 1,
"proto=%s", netid);
free(netid);
if (po_append(options, new_option) == PO_FAILED)
return 0;
if(po_remove_all(options, "port") == PO_FOUND ||
nfs_pmap->pm_port != NFS_PORT) {
snprintf(new_option, sizeof(new_option) - 1,
"port=%lu", nfs_pmap->pm_port);
if (po_append(options, new_option) == PO_FAILED)
return 0;
}
po_remove_all(options, "mountvers");
snprintf(new_option, sizeof(new_option) - 1,
"mountvers=%lu", mnt_pmap->pm_vers);
if (po_append(options, new_option) == PO_FAILED)
return 0;
po_remove_all(options, "mountproto");
netid = nfs_get_netid(mnt_saddr->sa_family, mnt_pmap->pm_prot);
if (netid == NULL)
return 0;
snprintf(new_option, sizeof(new_option) - 1,
"mountproto=%s", netid);
free(netid);
if (po_append(options, new_option) == PO_FAILED)
return 0;
po_remove_all(options, "mountport");
snprintf(new_option, sizeof(new_option) - 1,
"mountport=%lu", mnt_pmap->pm_port);
if (po_append(options, new_option) == PO_FAILED)
return 0;
return 1;
}
