X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmount%2Fstropts.c;h=9b4197b7f93d812958da2b4eaffd73cba5600836;hp=4ffee485f0d0c29f42ffd9eddd1f689d0cba3725;hb=329c63dd7e4e76fc66e8a6058d95c59974ad7db1;hpb=25dd860f13b93109dfd54ef8be0bfd91e4353af1 diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c index 4ffee48..9b4197b 100644 --- a/utils/mount/stropts.c +++ b/utils/mount/stropts.c @@ -16,8 +16,8 @@ * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. + * Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 0211-1301 USA * */ @@ -49,10 +49,6 @@ #include "parse_dev.h" #include "conffile.h" -#ifndef HAVE_DECL_AI_ADDRCONFIG -#define AI_ADDRCONFIG 0 -#endif - #ifndef NFS_PROGRAM #define NFS_PROGRAM (100003) #endif @@ -114,7 +110,7 @@ static void nfs_default_version(struct nfsmount_info *mi) } } #else -inline void nfs_default_version(struct nfsmount_info *mi) {} +inline void nfs_default_version(__attribute__ ((unused)) struct nfsmount_info *mi) {} #endif /* MOUNT_CONFIG */ /* @@ -123,10 +119,12 @@ inline void nfs_default_version(struct nfsmount_info *mi) {} * Returns a time_t timeout timestamp, in seconds. */ static time_t nfs_parse_retry_option(struct mount_options *options, - unsigned int timeout_minutes) + const time_t default_timeout) { + time_t timeout_minutes; long tmp; + timeout_minutes = default_timeout; switch (po_get_numeric(options, "retry", &tmp)) { case PO_NOT_FOUND: break; @@ -135,6 +133,7 @@ static time_t nfs_parse_retry_option(struct mount_options *options, timeout_minutes = tmp; break; } + /*FALLTHROUGH*/ case PO_BAD_VALUE: if (verbose) nfs_error(_("%s: invalid retry timeout was specified; " @@ -142,7 +141,7 @@ static time_t nfs_parse_retry_option(struct mount_options *options, break; } - return time(NULL) + (time_t)(timeout_minutes * 60); + return time(NULL) + (timeout_minutes * 60); } /* @@ -302,11 +301,16 @@ static int nfs_set_version(struct nfsmount_info *mi) if (strncmp(mi->type, "nfs4", 4) == 0) mi->version = 4; - else { - char *option = po_get(mi->options, "proto"); - if (option && strcmp(option, "rdma") == 0) - mi->version = 3; - } + + /* + * Before 2.6.32, the kernel NFS client didn't + * support "-t nfs vers=4" mounts, so NFS version + * 4 cannot be included when autonegotiating + * while running on those kernels. + */ + if (mi->version == 0 && + linux_version_code() <= MAKE_VERSION(2, 6, 31)) + mi->version = 3; /* * If we still don't know, check for version-specific @@ -338,7 +342,6 @@ static int nfs_validate_options(struct nfsmount_info *mi) { struct addrinfo hint = { .ai_protocol = (int)IPPROTO_UDP, - .ai_flags = AI_ADDRCONFIG, }; sa_family_t family; int error; @@ -434,8 +437,8 @@ static int nfs_construct_new_options(struct mount_options *options, if (po_append(options, new_option) == PO_FAILED) return 0; - po_remove_all(options, "port"); - if (nfs_pmap->pm_port != NFS_PORT) { + 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) @@ -490,14 +493,18 @@ nfs_rewrite_pmap_mount_options(struct mount_options *options) union nfs_sockaddr mnt_address; struct sockaddr *mnt_saddr = &mnt_address.sa; socklen_t mnt_salen = sizeof(mnt_address); + unsigned long protocol; struct pmap mnt_pmap; - char *option; /* - * Skip option negotiation for proto=rdma mounts. + * Version and transport negotiation is not required + * and does not work for RDMA mounts. */ - option = po_get(options, "proto"); - if (option && strcmp(option, "rdma") == 0) + if (!nfs_nfs_protocol(options, &protocol)) { + errno = EINVAL; + return 0; + } + if (protocol == NFSPROTO_RDMA) goto out; /* @@ -531,6 +538,10 @@ nfs_rewrite_pmap_mount_options(struct mount_options *options) errno = ESPIPE; if (rpc_createerr.cf_stat == RPC_PROGNOTREGISTERED) errno = EOPNOTSUPP; + else if (rpc_createerr.cf_stat == RPC_AUTHERROR) + errno = EACCES; + else if (rpc_createerr.cf_stat == RPC_TIMEDOUT) + errno = ETIMEDOUT; else if (rpc_createerr.cf_error.re_errno != 0) errno = rpc_createerr.cf_error.re_errno; return 0; @@ -538,7 +549,10 @@ nfs_rewrite_pmap_mount_options(struct mount_options *options) if (!nfs_construct_new_options(options, nfs_saddr, &nfs_pmap, mnt_saddr, &mnt_pmap)) { - errno = EINVAL; + if (rpc_createerr.cf_stat == RPC_UNKNOWNPROTO) + errno = EPROTONOSUPPORT; + else + errno = EINVAL; return 0; } @@ -558,20 +572,18 @@ static int nfs_sys_mount(struct nfsmount_info *mi, struct mount_options *opts) char *options = NULL; int result; + if (mi->fake) + return 1; + if (po_join(opts, &options) == PO_FAILED) { errno = EIO; return 0; } - if (verbose) - printf(_("%s: trying text-based options '%s'\n"), - progname, options); - - if (mi->fake) - return 1; - result = mount(mi->spec, mi->node, mi->type, mi->flags & ~(MS_USER|MS_USERS), options); + free(options); + if (verbose && result) { int save = errno; nfs_error(_("%s: mount(2): %s"), progname, strerror(save)); @@ -580,10 +592,8 @@ static int nfs_sys_mount(struct nfsmount_info *mi, struct mount_options *opts) return !result; } -/* - * For "-t nfs vers=2" or "-t nfs vers=3" mounts. - */ -static int nfs_try_mount_v3v2(struct nfsmount_info *mi) +static int nfs_do_mount_v3v2(struct nfsmount_info *mi, + struct sockaddr *sap, socklen_t salen) { struct mount_options *options = po_dup(mi->options); int result = 0; @@ -592,13 +602,21 @@ static int nfs_try_mount_v3v2(struct nfsmount_info *mi) errno = ENOMEM; return result; } + errno = 0; + if (!nfs_append_addr_option(sap, salen, options)) { + if (errno == 0) + errno = EINVAL; + goto out_fail; + } if (!nfs_fix_mounthost_option(options, mi->hostname)) { - errno = EINVAL; + if (errno == 0) + errno = EINVAL; goto out_fail; } if (!mi->fake && !nfs_verify_lock_option(options)) { - errno = EINVAL; + if (errno == 0) + errno = EINVAL; goto out_fail; } @@ -613,6 +631,10 @@ static int nfs_try_mount_v3v2(struct nfsmount_info *mi) goto out_fail; } + if (verbose) + printf(_("%s: trying text-based options '%s'\n"), + progname, *mi->extra_opts); + if (!nfs_rewrite_pmap_mount_options(options)) goto out_fail; @@ -624,13 +646,41 @@ out_fail: } /* - * For "-t nfs -o vers=4" or "-t nfs4" mounts. + * Attempt a "-t nfs vers=2" or "-t nfs vers=3" mount. + * + * Returns TRUE if successful, otherwise FALSE. + * "errno" is set to reflect the individual error. */ -static int nfs_try_mount_v4(struct nfsmount_info *mi) +static int nfs_try_mount_v3v2(struct nfsmount_info *mi) +{ + struct addrinfo *ai; + int ret = 0; + + for (ai = mi->address; ai != NULL; ai = ai->ai_next) { + ret = nfs_do_mount_v3v2(mi, ai->ai_addr, ai->ai_addrlen); + if (ret != 0) + return ret; + + switch (errno) { + case ECONNREFUSED: + case EOPNOTSUPP: + case EHOSTUNREACH: + case ETIMEDOUT: + continue; + default: + goto out; + } + } +out: + return ret; +} + +static int nfs_do_mount_v4(struct nfsmount_info *mi, + struct sockaddr *sap, socklen_t salen) { - struct addrinfo *ai = mi->address; struct mount_options *options = po_dup(mi->options); int result = 0; + char *extra_opts = NULL; if (!options) { errno = ENOMEM; @@ -656,26 +706,111 @@ static int nfs_try_mount_v4(struct nfsmount_info *mi) } } - if (!nfs_append_clientaddr_option(ai->ai_addr, ai->ai_addrlen, options)) { + if (!nfs_append_addr_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) { + if (!nfs_append_clientaddr_option(sap, salen, options)) { + errno = EINVAL; + goto out_fail; + } + + if (po_join(options, &extra_opts) == PO_FAILED) { errno = ENOMEM; goto out_fail; } + if (verbose) + printf(_("%s: trying text-based options '%s'\n"), + progname, extra_opts); + result = nfs_sys_mount(mi, options); + /* + * If success, update option string to be recorded in /etc/mtab. + */ + if (result) { + free(*mi->extra_opts); + *mi->extra_opts = extra_opts; + } else + free(extra_opts); + out_fail: po_destroy(options); return result; } +/* + * Attempt a "-t nfs -o vers=4" or "-t nfs4" mount. + * + * Returns TRUE if successful, otherwise FALSE. + * "errno" is set to reflect the individual error. + */ +static int nfs_try_mount_v4(struct nfsmount_info *mi) +{ + struct addrinfo *ai; + int ret = 0; + + for (ai = mi->address; ai != NULL; ai = ai->ai_next) { + ret = nfs_do_mount_v4(mi, ai->ai_addr, ai->ai_addrlen); + if (ret != 0) + return ret; + + switch (errno) { + case ECONNREFUSED: + case EHOSTUNREACH: + case ETIMEDOUT: + continue; + default: + goto out; + } + } +out: + return ret; +} + +/* + * Handle NFS version and transport protocol + * autonegotiation. + * + * When no version or protocol is specified on the + * command line, mount.nfs negotiates with the server + * to determine appropriate settings for the new + * mount point. + * + * Returns TRUE if successful, otherwise FALSE. + * "errno" is set to reflect the individual error. + */ +static int nfs_autonegotiate(struct nfsmount_info *mi) +{ + int result; + + result = nfs_try_mount_v4(mi); + if (result) + return result; + + switch (errno) { + case EPROTONOSUPPORT: + /* A clear indication that the server or our + * client does not support NFS version 4. */ + goto fall_back; + case ENOENT: + /* Legacy Linux servers don't export an NFS + * version 4 pseudoroot. */ + goto fall_back; + case EPERM: + /* Linux servers prior to 2.6.25 may return + * EPERM when NFS version 4 is not supported. */ + goto fall_back; + default: + return result; + } + +fall_back: + return nfs_try_mount_v3v2(mi); +} + /* * This is a single pass through the fg/bg loop. * @@ -688,20 +823,8 @@ static int nfs_try_mount(struct nfsmount_info *mi) switch (mi->version) { case 0: - if (linux_version_code() > MAKE_VERSION(2, 6, 31)) { - errno = 0; - result = nfs_try_mount_v4(mi); - if (errno != EPROTONOSUPPORT) { - /* - * To deal with legacy Linux servers that don't - * automatically export a pseudo root, retry - * ENOENT errors using version 3. And for - * Linux servers prior to 2.6.25, retry EPERM - */ - if (errno != ENOENT && errno != EPERM) - break; - } - } + result = nfs_autonegotiate(mi); + break; case 2: case 3: result = nfs_try_mount_v3v2(mi); @@ -735,6 +858,7 @@ static int nfs_is_permanent_error(int error) case ESTALE: case ETIMEDOUT: case ECONNREFUSED: + case EHOSTUNREACH: return 0; /* temporary */ default: return 1; /* permanent */ @@ -796,7 +920,8 @@ static int nfsmount_parent(struct nfsmount_info *mi) if (nfs_try_mount(mi)) return EX_SUCCESS; - if (nfs_is_permanent_error(errno)) { + /* retry background mounts when the server is not up */ + if (nfs_is_permanent_error(errno) && errno != EOPNOTSUPP) { mount_error(mi->spec, mi->node, errno); return EX_FAIL; } @@ -831,7 +956,8 @@ static int nfsmount_child(struct nfsmount_info *mi) if (nfs_try_mount(mi)) return EX_SUCCESS; - if (nfs_is_permanent_error(errno)) + /* retry background mounts when the server is not up */ + if (nfs_is_permanent_error(errno) && errno != EOPNOTSUPP) break; if (time(NULL) > timeout) @@ -857,6 +983,26 @@ static int nfsmount_bg(struct nfsmount_info *mi) return nfsmount_child(mi); } +/* + * Usually all that is needed for an NFS remount is to change + * generic mount options like "sync" or "ro". These generic + * options are controlled by mi->flags, not by text-based + * options, and no contact with the server is needed. + * + * Take care with the /etc/mtab entry for this mount; just + * calling update_mtab() will change an "-t nfs -o vers=4" + * mount to an "-t nfs -o remount" mount, and that will + * confuse umount.nfs. + * + * Returns a valid mount command exit code. + */ +static int nfs_remount(struct nfsmount_info *mi) +{ + if (nfs_sys_mount(mi, mi->options)) + return EX_SUCCESS; + return EX_FAIL; +} + /* * Process mount options and try a mount system call. * @@ -873,6 +1019,12 @@ static int nfsmount_start(struct nfsmount_info *mi) if (!nfs_validate_options(mi)) return EX_FAIL; + /* + * Avoid retry and negotiation logic when remounting + */ + if (mi->flags & MS_REMOUNT) + return nfs_remount(mi); + if (po_rightmost(mi->options, nfs_background_opttbl) == 0) return nfsmount_bg(mi); else @@ -889,6 +1041,8 @@ static int nfsmount_start(struct nfsmount_info *mi) * (input and output argument) * @fake: flag indicating whether to carry out the whole operation * @child: one if this is a mount daemon (bg) + * + * Returns a valid mount command exit code. */ int nfsmount_string(const char *spec, const char *node, const char *type, int flags, char **extra_opts, int fake, int child)