diff options
| -rw-r--r-- | include/libbb.h | 3 | ||||
| -rw-r--r-- | util-linux/Makefile.in | 1 | ||||
| -rw-r--r-- | util-linux/mount.c | 1023 | ||||
| -rw-r--r-- | util-linux/nfsmount.c | 1022 |
4 files changed, 1018 insertions, 1031 deletions
diff --git a/include/libbb.h b/include/libbb.h index dfb7a70bd..10309cff2 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -303,9 +303,6 @@ extern int set_loop(char **device, const char *file, int offset); extern int vdprintf(int d, const char *format, va_list ap); #endif -int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts); -int nfsmount(struct mntent *mp, int vfsflags, char *filteropts); - /* Include our own copy of struct sysinfo to avoid binary compatibility * problems with Linux 2.4, which changed things. Grumble, grumble. */ struct sysinfo { diff --git a/util-linux/Makefile.in b/util-linux/Makefile.in index d12f9f24f..3d6c96a35 100644 --- a/util-linux/Makefile.in +++ b/util-linux/Makefile.in @@ -29,7 +29,6 @@ UTILLINUX-$(CONFIG_MKFS_MINIX) +=mkfs_minix.o UTILLINUX-$(CONFIG_MKSWAP) +=mkswap.o UTILLINUX-$(CONFIG_MORE) +=more.o UTILLINUX-$(CONFIG_MOUNT) +=mount.o -UTILLINUX-$(CONFIG_FEATURE_MOUNT_NFS) +=nfsmount.o UTILLINUX-$(CONFIG_PIVOT_ROOT) +=pivot_root.o UTILLINUX-$(CONFIG_RDATE) +=rdate.o UTILLINUX-$(CONFIG_READPROFILE) +=readprofile.o diff --git a/util-linux/mount.c b/util-linux/mount.c index 4ed000e88..5592a7a5f 100644 --- a/util-linux/mount.c +++ b/util-linux/mount.c @@ -84,10 +84,10 @@ struct { {"ro", MS_RDONLY}, // vfs flag {"rw", ~MS_RDONLY}, // vfs flag {"remount", MS_REMOUNT}, // action flag - - }; +static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts); + /* Append mount options to string */ static void append_mount_options(char **oldopts, char *newopts) { @@ -196,7 +196,7 @@ static int fakeIt; #endif // Perform actual mount of specific filesystem at specific location. -int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) +static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) { int rc; @@ -234,7 +234,7 @@ int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) // Add vfs string flags for(i=0; mount_options[i].flags != MS_REMOUNT; i++) - if (mount_options[i].flags > 0 && (mount_options[i].flags&vfsflags)) + if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags)) append_mount_options(&(mp->mnt_opts), mount_options[i].name); // Remove trailing / (if any) from directory we mounted on @@ -260,8 +260,8 @@ int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts) mp->mnt_fsname = srcbuf; } mp->mnt_type = "none"; - mp->mnt_freq = mp->mnt_passno = 0; } + mp->mnt_freq = mp->mnt_passno = 0; // Write and close. @@ -613,3 +613,1016 @@ clean_up: return rc; } + + +#if ENABLE_FEATURE_MOUNT_NFS + +/* + * Linux NFS mount + * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com> + * + * Licensed under GPLv2, see file LICENSE in this tarball for details. + * + * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port + * numbers to be specified on the command line. + * + * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>: + * Omit the call to connect() for Linux version 1.3.11 or later. + * + * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com> + * Implemented the "bg", "fg" and "retry" mount options for NFS. + * + * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> + * - added Native Language Support + * + * Modified by Olaf Kirch and Trond Myklebust for new NFS code, + * plus NFSv3 stuff. + */ + +#include <syslog.h> +#include <sys/utsname.h> +#undef TRUE +#undef FALSE +#include <rpc/rpc.h> +#include <rpc/pmap_prot.h> +#include <rpc/pmap_clnt.h> + +/* This is just a warning of a common mistake. Possibly this should be a + * uclibc faq entry rather than in busybox... */ +#if ENABLE_FEATURE_MOUNT_NFS && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__) +#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support." +#endif + +#define MOUNTPORT 635 +#define MNTPATHLEN 1024 +#define MNTNAMLEN 255 +#define FHSIZE 32 +#define FHSIZE3 64 + +typedef char fhandle[FHSIZE]; + +typedef struct { + unsigned int fhandle3_len; + char *fhandle3_val; +} fhandle3; + +enum mountstat3 { + MNT_OK = 0, + MNT3ERR_PERM = 1, + MNT3ERR_NOENT = 2, + MNT3ERR_IO = 5, + MNT3ERR_ACCES = 13, + MNT3ERR_NOTDIR = 20, + MNT3ERR_INVAL = 22, + MNT3ERR_NAMETOOLONG = 63, + MNT3ERR_NOTSUPP = 10004, + MNT3ERR_SERVERFAULT = 10006, +}; +typedef enum mountstat3 mountstat3; + +struct fhstatus { + unsigned int fhs_status; + union { + fhandle fhs_fhandle; + } fhstatus_u; +}; +typedef struct fhstatus fhstatus; + +struct mountres3_ok { + fhandle3 fhandle; + struct { + unsigned int auth_flavours_len; + char *auth_flavours_val; + } auth_flavours; +}; +typedef struct mountres3_ok mountres3_ok; + +struct mountres3 { + mountstat3 fhs_status; + union { + mountres3_ok mountinfo; + } mountres3_u; +}; +typedef struct mountres3 mountres3; + +typedef char *dirpath; + +typedef char *name; + +typedef struct mountbody *mountlist; + +struct mountbody { + name ml_hostname; + dirpath ml_directory; + mountlist ml_next; +}; +typedef struct mountbody mountbody; + +typedef struct groupnode *groups; + +struct groupnode { + name gr_name; + groups gr_next; +}; +typedef struct groupnode groupnode; + +typedef struct exportnode *exports; + +struct exportnode { + dirpath ex_dir; + groups ex_groups; + exports ex_next; +}; +typedef struct exportnode exportnode; + +struct ppathcnf { + int pc_link_max; + short pc_max_canon; + short pc_max_input; + short pc_name_max; + short pc_path_max; + short pc_pipe_buf; + u_char pc_vdisable; + char pc_xxx; + short pc_mask[2]; +}; +typedef struct ppathcnf ppathcnf; + +#define MOUNTPROG 100005 +#define MOUNTVERS 1 + +#define MOUNTPROC_NULL 0 +#define MOUNTPROC_MNT 1 +#define MOUNTPROC_DUMP 2 +#define MOUNTPROC_UMNT 3 +#define MOUNTPROC_UMNTALL 4 +#define MOUNTPROC_EXPORT 5 +#define MOUNTPROC_EXPORTALL 6 + +#define MOUNTVERS_POSIX 2 + +#define MOUNTPROC_PATHCONF 7 + +#define MOUNT_V3 3 + +#define MOUNTPROC3_NULL 0 +#define MOUNTPROC3_MNT 1 +#define MOUNTPROC3_DUMP 2 +#define MOUNTPROC3_UMNT 3 +#define MOUNTPROC3_UMNTALL 4 +#define MOUNTPROC3_EXPORT 5 + +enum { +#ifndef NFS_FHSIZE + NFS_FHSIZE = 32, +#endif +#ifndef NFS_PORT + NFS_PORT = 2049 +#endif +}; + + +/* + * We want to be able to compile mount on old kernels in such a way + * that the binary will work well on more recent kernels. + * Thus, if necessary we teach nfsmount.c the structure of new fields + * that will come later. + * + * Moreover, the new kernel includes conflict with glibc includes + * so it is easiest to ignore the kernel altogether (at compile time). + */ + +struct nfs2_fh { + char data[32]; +}; +struct nfs3_fh { + unsigned short size; + unsigned char data[64]; +}; + +struct nfs_mount_data { + int version; /* 1 */ + int fd; /* 1 */ + struct nfs2_fh old_root; /* 1 */ + int flags; /* 1 */ + int rsize; /* 1 */ + int wsize; /* 1 */ + int timeo; /* 1 */ + int retrans; /* 1 */ + int acregmin; /* 1 */ + int acregmax; /* 1 */ + int acdirmin; /* 1 */ + int acdirmax; /* 1 */ + struct sockaddr_in addr; /* 1 */ + char hostname[256]; /* 1 */ + int namlen; /* 2 */ + unsigned int bsize; /* 3 */ + struct nfs3_fh root; /* 4 */ +}; + +/* bits in the flags field */ +enum { + NFS_MOUNT_SOFT = 0x0001, /* 1 */ + NFS_MOUNT_INTR = 0x0002, /* 1 */ + NFS_MOUNT_SECURE = 0x0004, /* 1 */ + NFS_MOUNT_POSIX = 0x0008, /* 1 */ + NFS_MOUNT_NOCTO = 0x0010, /* 1 */ + NFS_MOUNT_NOAC = 0x0020, /* 1 */ + NFS_MOUNT_TCP = 0x0040, /* 2 */ + NFS_MOUNT_VER3 = 0x0080, /* 3 */ + NFS_MOUNT_KERBEROS = 0x0100, /* 3 */ + NFS_MOUNT_NONLM = 0x0200 /* 3 */ +}; + + +/* + * We need to translate between nfs status return values and + * the local errno values which may not be the same. + * + * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno: + * "after #include <errno.h> the symbol errno is reserved for any use, + * it cannot even be used as a struct tag or field name". + */ + +#ifndef EDQUOT +#define EDQUOT ENOSPC +#endif + +// Convert each NFSERR_BLAH into EBLAH + +static const struct { + int stat; + int errnum; +} nfs_errtbl[] = { + {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST}, + {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG}, + {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT}, + {70,ESTALE}, {71,EREMOTE}, {-1,EIO} +}; + +static char *nfs_strerror(int status) +{ + int i; + static char buf[256]; + + for (i = 0; nfs_errtbl[i].stat != -1; i++) { + if (nfs_errtbl[i].stat == status) + return strerror(nfs_errtbl[i].errnum); + } + sprintf(buf, "unknown nfs status return value: %d", status); + return buf; +} + +static bool_t xdr_fhandle(XDR *xdrs, fhandle objp) +{ + if (!xdr_opaque(xdrs, objp, FHSIZE)) + return FALSE; + return TRUE; +} + +static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp) +{ + if (!xdr_u_int(xdrs, &objp->fhs_status)) + return FALSE; + switch (objp->fhs_status) { + case 0: + if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle)) + return FALSE; + break; + default: + break; + } + return TRUE; +} + +static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp) +{ + if (!xdr_string(xdrs, objp, MNTPATHLEN)) + return FALSE; + return TRUE; +} + +static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp) +{ + if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3)) + return FALSE; + return TRUE; +} + +static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp) +{ + if (!xdr_fhandle3(xdrs, &objp->fhandle)) + return FALSE; + if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0, + sizeof (int), (xdrproc_t) xdr_int)) + return FALSE; + return TRUE; +} + +static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp) +{ + if (!xdr_enum(xdrs, (enum_t *) objp)) + return FALSE; + return TRUE; +} + +static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp) +{ + if (!xdr_mountstat3(xdrs, &objp->fhs_status)) + return FALSE; + switch (objp->fhs_status) { + case MNT_OK: + if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo)) + return FALSE; + break; + default: + break; + } + return TRUE; +} + +#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) + +/* + * nfs_mount_version according to the sources seen at compile time. + */ +static int nfs_mount_version; +static int kernel_version; + +/* + * Unfortunately, the kernel prints annoying console messages + * in case of an unexpected nfs mount version (instead of + * just returning some error). Therefore we'll have to try + * and figure out what version the kernel expects. + * + * Variables: + * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time + * NFS_MOUNT_VERSION: these nfsmount sources at compile time + * nfs_mount_version: version this source and running kernel can handle + */ +static void +find_kernel_nfs_mount_version(void) +{ + if (kernel_version) + return; + + nfs_mount_version = 4; /* default */ + + kernel_version = get_linux_version_code(); + if (kernel_version) { + if (kernel_version < KERNEL_VERSION(2,1,32)) + nfs_mount_version = 1; + else if (kernel_version < KERNEL_VERSION(2,2,18) || + (kernel_version >= KERNEL_VERSION(2,3,0) && + kernel_version < KERNEL_VERSION(2,3,99))) + nfs_mount_version = 3; + /* else v4 since 2.3.99pre4 */ + } +} + +static struct pmap * +get_mountport(struct sockaddr_in *server_addr, + long unsigned prog, + long unsigned version, + long unsigned proto, + long unsigned port) +{ + struct pmaplist *pmap; + static struct pmap p = {0, 0, 0, 0}; + + server_addr->sin_port = PMAPPORT; + pmap = pmap_getmaps(server_addr); + + if (version > MAX_NFSPROT) + version = MAX_NFSPROT; + if (!prog) + prog = MOUNTPROG; + p.pm_prog = prog; + p.pm_vers = version; + p.pm_prot = proto; + p.pm_port = port; + + while (pmap) { + if (pmap->pml_map.pm_prog != prog) + goto next; + if (!version && p.pm_vers > pmap->pml_map.pm_vers) + goto next; + if (version > 2 && pmap->pml_map.pm_vers != version) + goto next; + if (version && version <= 2 && pmap->pml_map.pm_vers > 2) + goto next; + if (pmap->pml_map.pm_vers > MAX_NFSPROT || + (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) || + (port && pmap->pml_map.pm_port != port)) + goto next; + memcpy(&p, &pmap->pml_map, sizeof(p)); +next: + pmap = pmap->pml_next; + } + if (!p.pm_vers) + p.pm_vers = MOUNTVERS; + if (!p.pm_port) + p.pm_port = MOUNTPORT; + if (!p.pm_prot) + p.pm_prot = IPPROTO_TCP; + return &p; +} + +static int daemonize(void) +{ + int fd; + int pid = fork(); + if (pid < 0) /* error */ + return -errno; + if (pid > 0) /* parent */ + return 0; + /* child */ + fd = xopen(bb_dev_null, O_RDWR); + dup2(fd, 0); + dup2(fd, 1); + dup2(fd, 2); + if (fd > 2) close(fd); + setsid(); + openlog(bb_applet_name, LOG_PID, LOG_DAEMON); + logmode = LOGMODE_SYSLOG; + return 1; +} + +// TODO +static inline int we_saw_this_host_before(const char *hostname) +{ + return 0; +} + +/* RPC strerror analogs are terminally idiotic: + * *mandatory* prefix and \n at end. + * This hopefully helps. Usage: + * error_msg_rpc(clnt_*error*(" ")) */ +static void error_msg_rpc(const char *msg) +{ + size_t len; + while (msg[0] == ' ' || msg[0] == ':') msg++; + len = strlen(msg); + while (len && msg[len-1] == '\n') len--; + bb_error_msg("%.*s", len, msg); +} + +static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts) +{ + CLIENT *mclient; + char *hostname; + char *pathname; + char *mounthost; + struct nfs_mount_data data; + char *opt; + struct hostent *hp; + struct sockaddr_in server_addr; + struct sockaddr_in mount_server_addr; + int msock, fsock; + union { + struct fhstatus nfsv2; + struct mountres3 nfsv3; + } status; + int daemonized; + char *s; + int port; + int mountport; + int proto; + int bg; + int soft; + int intr; + int posix; + int nocto; + int noac; + int nolock; + int retry; + int tcp; + int mountprog; + int mountvers; + int nfsprog; + int nfsvers; + int retval; + + find_kernel_nfs_mount_version(); + + daemonized = 0; + mounthost = NULL; + retval = ETIMEDOUT; + msock = fsock = -1; + mclient = NULL; + + /* NB: hostname, mounthost, filteropts must be free()d prior to return */ + + filteropts = xstrdup(filteropts); /* going to trash it later... */ + + hostname = xstrdup(mp->mnt_fsname); + /* mount_main() guarantees that ':' is there */ + s = strchr(hostname, ':'); + pathname = s + 1; + *s = '\0'; + /* Ignore all but first hostname in replicated mounts + until they can be fully supported. (mack@sgi.com) */ + s = strchr(hostname, ','); + if (s) { + *s = '\0'; + bb_error_msg("warning: multiple hostnames not supported"); + } + + server_addr.sin_family = AF_INET; + if (!inet_aton(hostname, &server_addr.sin_addr)) { + hp = gethostbyname(hostname); + if (hp == NULL) { + bb_herror_msg("%s", hostname); + goto fail; + } + if (hp->h_length > sizeof(struct in_addr)) { + bb_error_msg("got bad hp->h_length"); + hp->h_length = sizeof(struct in_addr); + } + memcpy(&server_addr.sin_addr, + hp->h_addr, hp->h_length); + } + + memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr)); + + /* add IP address to mtab options for use when unmounting */ + + if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */ + mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr)); + } else { + char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts, + mp->mnt_opts[0] ? "," : "", + inet_ntoa(server_addr.sin_addr)); + free(mp->mnt_opts); + mp->mnt_opts = tmp; + } + + /* Set default options. + * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to + * let the kernel decide. + * timeo is filled in after we know whether it'll be TCP or UDP. */ + memset(&data, 0, sizeof(data)); + data.retrans = 3; + data.acregmin = 3; + data.acregmax = 60; + data.acdirmin = 30; + data.acdirmax = 60; + data.namlen = NAME_MAX; + + bg = 0; + soft = 0; + intr = 0; + posix = 0; + nocto = 0; + nolock = 0; + noac = 0; + retry = 10000; /* 10000 minutes ~ 1 week */ + tcp = 0; + + mountprog = MOUNTPROG; + mountvers = 0; + port = 0; + mountport = 0; + nfsprog = 100003; + nfsvers = 0; + + /* parse options */ + + for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) { + char *opteq = strchr(opt, '='); + if (opteq) { + int val = atoi(opteq + 1); + *opteq = '\0'; + if (!strcmp(opt, "rsize")) + data.rsize = val; + else if (!strcmp(opt, "wsize")) + data.wsize = val; + else if (!strcmp(opt, "timeo")) + data.timeo = val; + else if (!strcmp(opt, "retrans")) + data.retrans = val; + else if (!strcmp(opt, "acregmin")) + data.acregmin = val; + else if (!strcmp(opt, "acregmax")) + data.acregmax = val; + else if (!strcmp(opt, "acdirmin")) + data.acdirmin = val; + else if (!strcmp(opt, "acdirmax")) + data.acdirmax = val; + else if (!strcmp(opt, "actimeo")) { + data.acregmin = val; + data.acregmax = val; + data.acdirmin = val; + data.acdirmax = val; + } + else if (!strcmp(opt, "retry")) + retry = val; + else if (!strcmp(opt, "port")) + port = val; + else if (!strcmp(opt, "mountport")) + mountport = val; + else if (!strcmp(opt, "mounthost")) + mounthost = xstrndup(opteq+1, + strcspn(opteq+1," \t\n\r,")); + else if (!strcmp(opt, "mountprog")) + mountprog = val; + else if (!strcmp(opt, "mountvers")) + mountvers = val; + else if (!strcmp(opt, "nfsprog")) + nfsprog = val; + else if (!strcmp(opt, "nfsvers") || + !strcmp(opt, "vers")) + nfsvers = val; + else if (!strcmp(opt, "proto")) { + if (!strncmp(opteq+1, "tcp", 3)) + tcp = 1; + else if (!strncmp(opteq+1, "udp", 3)) + tcp = 0; + else + bb_error_msg("warning: unrecognized proto= option"); + } else if (!strcmp(opt, "namlen")) { + if (nfs_mount_version >= 2) + data.namlen = val; + else + bb_error_msg("warning: option namlen is not supported\n"); + } else if (!strcmp(opt, "addr")) + /* ignore */; + else { + bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val); + goto fail; + } + } + else { + int val = 1; + if (!strncmp(opt, "no", 2)) { + val = 0; + opt += 2; + } + if (!strcmp(opt, "bg")) + bg = val; + else if (!strcmp(opt, "fg")) + bg = !val; + else if (!strcmp(opt, "soft")) + soft = val; + else if (!strcmp(opt, "hard")) + soft = !val; + else if (!strcmp(opt, "intr")) + intr = val; + else if (!strcmp(opt, "posix")) + posix = val; + else if (!strcmp(opt, "cto")) + nocto = !val; + else if (!strcmp(opt, "ac")) + noac = !val; + else if (!strcmp(opt, "tcp")) + tcp = val; + else if (!strcmp(opt, "udp")) + tcp = !val; + else if (!strcmp(opt, "lock")) { + if (nfs_mount_version >= 3) + nolock = !val; + else + bb_error_msg("warning: option nolock is not supported"); + } else { + bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt); + goto fail; + } + } + } + proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; + + data.flags = (soft ? NFS_MOUNT_SOFT : 0) + | (intr ? NFS_MOUNT_INTR : 0) + | (posix ? NFS_MOUNT_POSIX : 0) + | (nocto ? NFS_MOUNT_NOCTO : 0) + | (noac ? NFS_MOUNT_NOAC : 0); + if (nfs_mount_version >= 2) + data.flags |= (tcp ? NFS_MOUNT_TCP : 0); + if (nfs_mount_version >= 3) + data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); + if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) { + bb_error_msg("NFSv%d not supported", nfsvers); + goto fail; + } + if (nfsvers && !mountvers) + mountvers = (nfsvers < 3) ? 1 : nfsvers; + if (nfsvers && nfsvers < mountvers) { + mountvers = nfsvers; + } + + /* Adjust options if none specified */ + if (!data.timeo) + data.timeo = tcp ? 70 : 7; + +#ifdef NFS_MOUNT_DEBUG + printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n", + data.rsize, data.wsize, data.timeo, data.retrans); + printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n", + data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); + printf("port = %d, bg = %d, retry = %d, flags = %.8x\n", + port, bg, retry, data.flags); + printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n", + mountprog, mountvers, nfsprog, nfsvers); + printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n", + (data.flags & NFS_MOUNT_SOFT) != 0, + (data.flags & NFS_MOUNT_INTR) != 0, + (data.flags & NFS_MOUNT_POSIX) != 0, + (data.flags & NFS_MOUNT_NOCTO) != 0, + (data.flags & NFS_MOUNT_NOAC) != 0); + printf("tcp = %d\n", + (data.flags & NFS_MOUNT_TCP) != 0); +#endif + + data.version = nfs_mount_version; + + if (vfsflags & MS_REMOUNT) + goto do_mount; + + /* + * If the previous mount operation on the same host was + * backgrounded, and the "bg" for this mount is also set, + * give up immediately, to avoid the initial timeout. + */ + if (bg && we_saw_this_host_before(hostname)) { + daemonized = daemonize(); /* parent or error */ + if (daemonized <= 0) { /* parent or error */ + retval = -daemonized; + goto ret; + } + } + + /* create mount daemon client */ + /* See if the nfs host = mount host. */ + if (mounthost) { + if (mounthost[0] >= '0' && mounthost[0] <= '9') { + mount_server_addr.sin_family = AF_INET; + mount_server_addr.sin_addr.s_addr = inet_addr(hostname); + } else { + hp = gethostbyname(mounthost); + if (hp == NULL) { + bb_herror_msg("%s", mounthost); + goto fail; + } else { + if (hp->h_length > sizeof(struct in_addr)) { + bb_error_msg("got bad hp->h_length?"); + hp->h_length = sizeof(struct in_addr); + } + mount_server_addr.sin_family = AF_INET; + memcpy(&mount_server_addr.sin_addr, + hp->h_addr, hp->h_length); + } + } + } + + /* + * The following loop implements the mount retries. When the mount + * times out, and the "bg" option is set, we background ourself + * and continue trying. + * + * The case where the mount point is not present and the "bg" + * option is set, is treated as a timeout. This is done to + * support nested mounts. + * + * The "retry" count specified by the user is the number of + * minutes to retry before giving up. + */ + { + struct timeval total_timeout; + struct timeval retry_timeout; + struct pmap* pm_mnt; + time_t t; + time_t prevt; + time_t timeout; + + retry_timeout.tv_sec = 3; + retry_timeout.tv_usec = 0; + total_timeout.tv_sec = 20; + total_timeout.tv_usec = 0; + timeout = time(NULL) + 60 * retry; + prevt = 0; + t = 30; +retry: + /* be careful not to use too many CPU cycles */ + if (t - prevt < 30) + sleep(30); + + pm_mnt = get_mountport(&mount_server_addr, + mountprog, + mountvers, + proto, + mountport); + nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; + + /* contact the mount daemon via TCP */ + mount_server_addr.sin_port = htons(pm_mnt->pm_port); + msock = RPC_ANYSOCK; + + switch (pm_mnt->pm_prot) { + case IPPROTO_UDP: + mclient = clntudp_create(&mount_server_addr, + pm_mnt->pm_prog, + pm_mnt->pm_vers, + retry_timeout, + &msock); + if (mclient) + break; + mount_server_addr.sin_port = htons(pm_mnt->pm_port); + msock = RPC_ANYSOCK; + case IPPROTO_TCP: + mclient = clnttcp_create(&mount_server_addr, + pm_mnt->pm_prog, + pm_mnt->pm_vers, + &msock, 0, 0); + break; + default: + mclient = 0; + } + if (!mclient) { + if (!daemonized && prevt == 0) + error_msg_rpc(clnt_spcreateerror(" ")); + } else { + enum clnt_stat clnt_stat; + /* try to mount hostname:pathname */ + mclient->cl_auth = authunix_create_default(); + + /* make pointers in xdr_mountres3 NULL so + * that xdr_array allocates memory for us + */ + memset(&status, 0, sizeof(status)); + + if (pm_mnt->pm_vers == 3) + clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, + (xdrproc_t) xdr_dirpath, + (caddr_t) &pathname, + (xdrproc_t) xdr_mountres3, + (caddr_t) &status, + total_timeout); + else + clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, + (xdrproc_t) xdr_dirpath, + (caddr_t) &pathname, + (xdrproc_t) xdr_fhstatus, + (caddr_t) &status, + total_timeout); + + if (clnt_stat == RPC_SUCCESS) + goto prepare_kernel_data; /* we're done */ + if (errno != ECONNREFUSED) { + error_msg_rpc(clnt_sperror(mclient, " ")); + goto fail; /* don't retry */ + } + /* Connection refused */ + if (!daemonized && prevt == 0) /* print just once */ + error_msg_rpc(clnt_sperror(mclient, " ")); + auth_destroy(mclient->cl_auth); + clnt_destroy(mclient); + mclient = 0; + close(msock); + } + + /* Timeout. We are going to retry... maybe */ + + if (!bg) + goto fail; + if (!daemonized) { + daemonized = daemonize(); + if (daemonized <= 0) { /* parent or error */ + retval = -daemonized; + goto ret; + } + } + prevt = t; + t = time(NULL); + if (t >= timeout) + /* TODO error message */ + goto fail; + + goto retry; + } + +prepare_kernel_data: + + if (nfsvers == 2) { + if (status.nfsv2.fhs_status != 0) { + bb_error_msg("%s:%s failed, reason given by server: %s", + hostname, pathname, + nfs_strerror(status.nfsv2.fhs_status)); + goto fail; + } + memcpy(data.root.data, + (char *) status.nfsv2.fhstatus_u.fhs_fhandle, + NFS_FHSIZE); + data.root.size = NFS_FHSIZE; + memcpy(data.old_root.data, + (char *) status.nfsv2.fhstatus_u.fhs_fhandle, + NFS_FHSIZE); + } else { + fhandle3 *my_fhandle; + if (status.nfsv3.fhs_status != 0) { + bb_error_msg("%s:%s failed, reason given by server: %s", + hostname, pathname, + nfs_strerror(status.nfsv3.fhs_status)); + goto fail; + } + my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; + memset(data.old_root.data, 0, NFS_FHSIZE); + memset(&data.root, 0, sizeof(data.root)); + data.root.size = my_fhandle->fhandle3_len; + memcpy(data.root.data, + (char *) my_fhandle->fhandle3_val, + my_fhandle->fhandle3_len); + + data.flags |= NFS_MOUNT_VER3; + } + + /* create nfs socket for kernel */ + + if (tcp) { + if (nfs_mount_version < 3) { + bb_error_msg("NFS over TCP is not supported"); + goto fail; + } + fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + } else + fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); + if (fsock < 0) { + bb_perror_msg("nfs socket"); + goto fail; + } + if (bindresvport(fsock, 0) < 0) { + bb_perror_msg("nfs bindresvport"); + goto fail; + } + if (port == 0) { + server_addr.sin_port = PMAPPORT; + port = pmap_getport(&server_addr, nfsprog, nfsvers, + tcp ? IPPROTO_TCP : IPPROTO_UDP); + if (port == 0) + port = NFS_PORT; +#ifdef NFS_MOUNT_DEBUG + else + printf("used portmapper to find NFS port\n"); +#endif + } +#ifdef NFS_MOUNT_DEBUG + printf("using port %d for nfs daemon\n", port); +#endif + server_addr.sin_port = htons(port); + + /* prepare data structure for kernel */ + + data.fd = fsock; + memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); + strncpy(data.hostname, hostname, sizeof(data.hostname)); + + /* clean up */ + + auth_destroy(mclient->cl_auth); + clnt_destroy(mclient); + close(msock); + + if (bg) { + /* We must wait until mount directory is available */ + struct stat statbuf; + int delay = 1; + while (stat(mp->mnt_dir, &statbuf) == -1) { + if (!daemonized) { + daemonized = daemonize(); + if (daemonized <= 0) { /* parent or error */ + retval = -daemonized; + goto ret; + } + } + sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */ + delay *= 2; + if (delay > 30) + delay = 30; + } + } + +do_mount: /* perform actual mount */ + + mp->mnt_type = "nfs"; + retval = mount_it_now(mp, vfsflags, (char*)&data); + goto ret; + +fail: /* abort */ + + if (msock != -1) { + if (mclient) { + auth_destroy(mclient->cl_auth); + clnt_destroy(mclient); + } + close(msock); + } + if (fsock != -1) + close(fsock); + +ret: + free(hostname); + free(mounthost); + free(filteropts); + return retval; +} + +#endif /* ENABLE_FEATURE_MOUNT_NFS */ diff --git a/util-linux/nfsmount.c b/util-linux/nfsmount.c deleted file mode 100644 index 4e523b5f3..000000000 --- a/util-linux/nfsmount.c +++ /dev/null @@ -1,1022 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * nfsmount.c -- Linux NFS mount - * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com> - * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. - * - * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port - * numbers to be specified on the command line. - * - * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>: - * Omit the call to connect() for Linux version 1.3.11 or later. - * - * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com> - * Implemented the "bg", "fg" and "retry" mount options for NFS. - * - * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org> - * - added Native Language Support - * - * Modified by Olaf Kirch and Trond Myklebust for new NFS code, - * plus NFSv3 stuff. - */ - -#include "busybox.h" -#include <syslog.h> -#include <mntent.h> -#include <sys/utsname.h> -#undef TRUE -#undef FALSE -#include <rpc/rpc.h> -#include <rpc/pmap_prot.h> -#include <rpc/pmap_clnt.h> - -/* This is just a warning of a common mistake. Possibly this should be a - * uclibc faq entry rather than in busybox... */ -#if ENABLE_FEATURE_MOUNT_NFS && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__) -#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support." -#endif - -/* former nfsmount.h */ - -#define MOUNTPORT 635 -#define MNTPATHLEN 1024 -#define MNTNAMLEN 255 -#define FHSIZE 32 -#define FHSIZE3 64 - -typedef char fhandle[FHSIZE]; - -typedef struct { - unsigned int fhandle3_len; - char *fhandle3_val; -} fhandle3; - -enum mountstat3 { - MNT_OK = 0, - MNT3ERR_PERM = 1, - MNT3ERR_NOENT = 2, - MNT3ERR_IO = 5, - MNT3ERR_ACCES = 13, - MNT3ERR_NOTDIR = 20, - MNT3ERR_INVAL = 22, - MNT3ERR_NAMETOOLONG = 63, - MNT3ERR_NOTSUPP = 10004, - MNT3ERR_SERVERFAULT = 10006, -}; -typedef enum mountstat3 mountstat3; - -struct fhstatus { - unsigned int fhs_status; - union { - fhandle fhs_fhandle; - } fhstatus_u; -}; -typedef struct fhstatus fhstatus; - -struct mountres3_ok { - fhandle3 fhandle; - struct { - unsigned int auth_flavours_len; - char *auth_flavours_val; - } auth_flavours; -}; -typedef struct mountres3_ok mountres3_ok; - -struct mountres3 { - mountstat3 fhs_status; - union { - mountres3_ok mountinfo; - } mountres3_u; -}; -typedef struct mountres3 mountres3; - -typedef char *dirpath; - -typedef char *name; - -typedef struct mountbody *mountlist; - -struct mountbody { - name ml_hostname; - dirpath ml_directory; - mountlist ml_next; -}; -typedef struct mountbody mountbody; - -typedef struct groupnode *groups; - -struct groupnode { - name gr_name; - groups gr_next; -}; -typedef struct groupnode groupnode; - -typedef struct exportnode *exports; - -struct exportnode { - dirpath ex_dir; - groups ex_groups; - exports ex_next; -}; -typedef struct exportnode exportnode; - -struct ppathcnf { - int pc_link_max; - short pc_max_canon; - short pc_max_input; - short pc_name_max; - short pc_path_max; - short pc_pipe_buf; - u_char pc_vdisable; - char pc_xxx; - short pc_mask[2]; -}; -typedef struct ppathcnf ppathcnf; - -#define MOUNTPROG 100005 -#define MOUNTVERS 1 - -#define MOUNTPROC_NULL 0 -#define MOUNTPROC_MNT 1 -#define MOUNTPROC_DUMP 2 -#define MOUNTPROC_UMNT 3 -#define MOUNTPROC_UMNTALL 4 -#define MOUNTPROC_EXPORT 5 -#define MOUNTPROC_EXPORTALL 6 - -#define MOUNTVERS_POSIX 2 - -#define MOUNTPROC_PATHCONF 7 - -#define MOUNT_V3 3 - -#define MOUNTPROC3_NULL 0 -#define MOUNTPROC3_MNT 1 -#define MOUNTPROC3_DUMP 2 -#define MOUNTPROC3_UMNT 3 -#define MOUNTPROC3_UMNTALL 4 -#define MOUNTPROC3_EXPORT 5 - -/* former nfsmount.h ends */ - -enum { -#ifndef NFS_FHSIZE - NFS_FHSIZE = 32, -#endif -#ifndef NFS_PORT - NFS_PORT = 2049 -#endif -}; - -//enum { -// S_QUOTA = 128, /* Quota initialized for file/directory/symlink */ -//}; - - -/* - * We want to be able to compile mount on old kernels in such a way - * that the binary will work well on more recent kernels. - * Thus, if necessary we teach nfsmount.c the structure of new fields - * that will come later. - * - * Moreover, the new kernel includes conflict with glibc includes - * so it is easiest to ignore the kernel altogether (at compile time). - */ - -struct nfs2_fh { - char data[32]; -}; -struct nfs3_fh { - unsigned short size; - unsigned char data[64]; -}; - -struct nfs_mount_data { - int version; /* 1 */ - int fd; /* 1 */ - struct nfs2_fh old_root; /* 1 */ - int flags; /* 1 */ - int rsize; /* 1 */ - int wsize; /* 1 */ - int timeo; /* 1 */ - int retrans; /* 1 */ - int acregmin; /* 1 */ - int acregmax; /* 1 */ - int acdirmin; /* 1 */ - int acdirmax; /* 1 */ - struct sockaddr_in addr; /* 1 */ - char hostname[256]; /* 1 */ - int namlen; /* 2 */ - unsigned int bsize; /* 3 */ - struct nfs3_fh root; /* 4 */ -}; - -/* bits in the flags field */ -enum { - NFS_MOUNT_SOFT = 0x0001, /* 1 */ - NFS_MOUNT_INTR = 0x0002, /* 1 */ - NFS_MOUNT_SECURE = 0x0004, /* 1 */ - NFS_MOUNT_POSIX = 0x0008, /* 1 */ - NFS_MOUNT_NOCTO = 0x0010, /* 1 */ - NFS_MOUNT_NOAC = 0x0020, /* 1 */ - NFS_MOUNT_TCP = 0x0040, /* 2 */ - NFS_MOUNT_VER3 = 0x0080, /* 3 */ - NFS_MOUNT_KERBEROS = 0x0100, /* 3 */ - NFS_MOUNT_NONLM = 0x0200 /* 3 */ -}; - -#define HAVE_inet_aton - -/* - * We need to translate between nfs status return values and - * the local errno values which may not be the same. - * - * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno: - * "after #include <errno.h> the symbol errno is reserved for any use, - * it cannot even be used as a struct tag or field name". - */ - -#ifndef EDQUOT -#define EDQUOT ENOSPC -#endif - -// Convert each NFSERR_BLAH into EBLAH - -static const struct { - int stat; - int errnum; -} nfs_errtbl[] = { - {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST}, - {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG}, - {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT}, - {70,ESTALE}, {71,EREMOTE}, {-1,EIO} -}; - -static char *nfs_strerror(int status) -{ - int i; - static char buf[256]; - - for (i = 0; nfs_errtbl[i].stat != -1; i++) { - if (nfs_errtbl[i].stat == status) - return strerror(nfs_errtbl[i].errnum); - } - sprintf(buf, "unknown nfs status return value: %d", status); - return buf; -} - -static bool_t xdr_fhandle(XDR *xdrs, fhandle objp) -{ - if (!xdr_opaque(xdrs, objp, FHSIZE)) - return FALSE; - return TRUE; -} - -static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp) -{ - if (!xdr_u_int(xdrs, &objp->fhs_status)) - return FALSE; - switch (objp->fhs_status) { - case 0: - if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle)) - return FALSE; - break; - default: - break; - } - return TRUE; -} - -static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp) -{ - if (!xdr_string(xdrs, objp, MNTPATHLEN)) - return FALSE; - return TRUE; -} - -static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp) -{ - if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3)) - return FALSE; - return TRUE; -} - -static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp) -{ - if (!xdr_fhandle3(xdrs, &objp->fhandle)) - return FALSE; - if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0, - sizeof (int), (xdrproc_t) xdr_int)) - return FALSE; - return TRUE; -} - -static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp) -{ - if (!xdr_enum(xdrs, (enum_t *) objp)) - return FALSE; - return TRUE; -} - -static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp) -{ - if (!xdr_mountstat3(xdrs, &objp->fhs_status)) - return FALSE; - switch (objp->fhs_status) { - case MNT_OK: - if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo)) - return FALSE; - break; - default: - break; - } - return TRUE; -} - -#define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2) - -/* - * nfs_mount_version according to the sources seen at compile time. - */ -static int nfs_mount_version; -static int kernel_version; - -/* - * Unfortunately, the kernel prints annoying console messages - * in case of an unexpected nfs mount version (instead of - * just returning some error). Therefore we'll have to try - * and figure out what version the kernel expects. - * - * Variables: - * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time - * NFS_MOUNT_VERSION: these nfsmount sources at compile time - * nfs_mount_version: version this source and running kernel can handle - */ -static void -find_kernel_nfs_mount_version(void) -{ - if (kernel_version) - return; - - nfs_mount_version = 4; /* default */ - - kernel_version = get_linux_version_code(); - if (kernel_version) { - if (kernel_version < KERNEL_VERSION(2,1,32)) - nfs_mount_version = 1; - else if (kernel_version < KERNEL_VERSION(2,2,18) || - (kernel_version >= KERNEL_VERSION(2,3,0) && - kernel_version < KERNEL_VERSION(2,3,99))) - nfs_mount_version = 3; - /* else v4 since 2.3.99pre4 */ - } -} - -static struct pmap * -get_mountport(struct sockaddr_in *server_addr, - long unsigned prog, - long unsigned version, - long unsigned proto, - long unsigned port) -{ - struct pmaplist *pmap; - static struct pmap p = {0, 0, 0, 0}; - - server_addr->sin_port = PMAPPORT; - pmap = pmap_getmaps(server_addr); - - if (version > MAX_NFSPROT) - version = MAX_NFSPROT; - if (!prog) - prog = MOUNTPROG; - p.pm_prog = prog; - p.pm_vers = version; - p.pm_prot = proto; - p.pm_port = port; - - while (pmap) { - if (pmap->pml_map.pm_prog != prog) - goto next; - if (!version && p.pm_vers > pmap->pml_map.pm_vers) - goto next; - if (version > 2 && pmap->pml_map.pm_vers != version) - goto next; - if (version && version <= 2 && pmap->pml_map.pm_vers > 2) - goto next; - if (pmap->pml_map.pm_vers > MAX_NFSPROT || - (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) || - (port && pmap->pml_map.pm_port != port)) - goto next; - memcpy(&p, &pmap->pml_map, sizeof(p)); -next: - pmap = pmap->pml_next; - } - if (!p.pm_vers) - p.pm_vers = MOUNTVERS; - if (!p.pm_port) - p.pm_port = MOUNTPORT; - if (!p.pm_prot) - p.pm_prot = IPPROTO_TCP; - return &p; -} - -static int daemonize(void) -{ - int fd; - int pid = fork(); - if (pid < 0) /* error */ - return -errno; - if (pid > 0) /* parent */ - return 0; - /* child */ - fd = xopen(bb_dev_null, O_RDWR); - dup2(fd, 0); - dup2(fd, 1); - dup2(fd, 2); - if (fd > 2) close(fd); - setsid(); - openlog(bb_applet_name, LOG_PID, LOG_DAEMON); - logmode = LOGMODE_SYSLOG; - return 1; -} - -// TODO -static inline int we_saw_this_host_before(const char *hostname) -{ - return 0; -} - -/* RPC strerror analogs are terminally idiotic: - * *mandatory* prefix and \n at end. - * This hopefully helps. Usage: - * error_msg_rpc(clnt_*error*(" ")) */ -static void error_msg_rpc(const char *msg) -{ - size_t len; - while (msg[0] == ' ' || msg[0] == ':') msg++; - len = strlen(msg); - while (len && msg[len-1] == '\n') len--; - bb_error_msg("%.*s", len, msg); -} - -int nfsmount(struct mntent *mp, int vfsflags, char *filteropts) -{ - CLIENT *mclient; - char *hostname; - char *pathname; - char *mounthost; - struct nfs_mount_data data; - char *opt; - struct hostent *hp; - struct sockaddr_in server_addr; - struct sockaddr_in mount_server_addr; - int msock, fsock; - union { - struct fhstatus nfsv2; - struct mountres3 nfsv3; - } status; - int daemonized; - char *s; - int port; - int mountport; - int proto; - int bg; - int soft; - int intr; - int posix; - int nocto; - int noac; - int nolock; - int retry; - int tcp; - int mountprog; - int mountvers; - int nfsprog; - int nfsvers; - int retval; - - find_kernel_nfs_mount_version(); - - daemonized = 0; - mounthost = NULL; - retval = ETIMEDOUT; - msock = fsock = -1; - mclient = NULL; - - /* NB: hostname, mounthost, filteropts must be free()d prior to return */ - - filteropts = xstrdup(filteropts); /* going to trash it later... */ - - hostname = xstrdup(mp->mnt_fsname); - /* mount_main() guarantees that ':' is there */ - s = strchr(hostname, ':'); - pathname = s + 1; - *s = '\0'; - /* Ignore all but first hostname in replicated mounts - until they can be fully supported. (mack@sgi.com) */ - s = strchr(hostname, ','); - if (s) { - *s = '\0'; - bb_error_msg("warning: multiple hostnames not supported"); - } - - server_addr.sin_family = AF_INET; -#ifdef HAVE_inet_aton - if (!inet_aton(hostname, &server_addr.sin_addr)) -#endif - { - hp = gethostbyname(hostname); - if (hp == NULL) { - bb_herror_msg("%s", hostname); - goto fail; - } - if (hp->h_length > sizeof(struct in_addr)) { - bb_error_msg("got bad hp->h_length"); - hp->h_length = sizeof(struct in_addr); - } - memcpy(&server_addr.sin_addr, - hp->h_addr, hp->h_length); - } - - memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr)); - - /* add IP address to mtab options for use when unmounting */ - - if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */ - mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr)); - } else { - char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts, - mp->mnt_opts[0] ? "," : "", - inet_ntoa(server_addr.sin_addr)); - free(mp->mnt_opts); - mp->mnt_opts = tmp; - } - - /* Set default options. - * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to - * let the kernel decide. - * timeo is filled in after we know whether it'll be TCP or UDP. */ - memset(&data, 0, sizeof(data)); - data.retrans = 3; - data.acregmin = 3; - data.acregmax = 60; - data.acdirmin = 30; - data.acdirmax = 60; - data.namlen = NAME_MAX; - - bg = 0; - soft = 0; - intr = 0; - posix = 0; - nocto = 0; - nolock = 0; - noac = 0; - retry = 10000; /* 10000 minutes ~ 1 week */ - tcp = 0; - - mountprog = MOUNTPROG; - mountvers = 0; - port = 0; - mountport = 0; - nfsprog = 100003; - nfsvers = 0; - - /* parse options */ - - for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) { - char *opteq = strchr(opt, '='); - if (opteq) { - int val = atoi(opteq + 1); - *opteq = '\0'; - if (!strcmp(opt, "rsize")) - data.rsize = val; - else if (!strcmp(opt, "wsize")) - data.wsize = val; - else if (!strcmp(opt, "timeo")) - data.timeo = val; - else if (!strcmp(opt, "retrans")) - data.retrans = val; - else if (!strcmp(opt, "acregmin")) - data.acregmin = val; - else if (!strcmp(opt, "acregmax")) - data.acregmax = val; - else if (!strcmp(opt, "acdirmin")) - data.acdirmin = val; - else if (!strcmp(opt, "acdirmax")) - data.acdirmax = val; - else if (!strcmp(opt, "actimeo")) { - data.acregmin = val; - data.acregmax = val; - data.acdirmin = val; - data.acdirmax = val; - } - else if (!strcmp(opt, "retry")) - retry = val; - else if (!strcmp(opt, "port")) - port = val; - else if (!strcmp(opt, "mountport")) - mountport = val; - else if (!strcmp(opt, "mounthost")) - mounthost = xstrndup(opteq+1, - strcspn(opteq+1," \t\n\r,")); - else if (!strcmp(opt, "mountprog")) - mountprog = val; - else if (!strcmp(opt, "mountvers")) - mountvers = val; - else if (!strcmp(opt, "nfsprog")) - nfsprog = val; - else if (!strcmp(opt, "nfsvers") || - !strcmp(opt, "vers")) - nfsvers = val; - else if (!strcmp(opt, "proto")) { - if (!strncmp(opteq+1, "tcp", 3)) - tcp = 1; - else if (!strncmp(opteq+1, "udp", 3)) - tcp = 0; - else - bb_error_msg("warning: unrecognized proto= option"); - } else if (!strcmp(opt, "namlen")) { - if (nfs_mount_version >= 2) - data.namlen = val; - else - bb_error_msg("warning: option namlen is not supported\n"); - } else if (!strcmp(opt, "addr")) - /* ignore */; - else { - bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val); - goto fail; - } - } - else { - int val = 1; - if (!strncmp(opt, "no", 2)) { - val = 0; - opt += 2; - } - if (!strcmp(opt, "bg")) - bg = val; - else if (!strcmp(opt, "fg")) - bg = !val; - else if (!strcmp(opt, "soft")) - soft = val; - else if (!strcmp(opt, "hard")) - soft = !val; - else if (!strcmp(opt, "intr")) - intr = val; - else if (!strcmp(opt, "posix")) - posix = val; - else if (!strcmp(opt, "cto")) - nocto = !val; - else if (!strcmp(opt, "ac")) - noac = !val; - else if (!strcmp(opt, "tcp")) - tcp = val; - else if (!strcmp(opt, "udp")) - tcp = !val; - else if (!strcmp(opt, "lock")) { - if (nfs_mount_version >= 3) - nolock = !val; - else - bb_error_msg("warning: option nolock is not supported"); - } else { - bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt); - goto fail; - } - } - } - proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP; - - data.flags = (soft ? NFS_MOUNT_SOFT : 0) - | (intr ? NFS_MOUNT_INTR : 0) - | (posix ? NFS_MOUNT_POSIX : 0) - | (nocto ? NFS_MOUNT_NOCTO : 0) - | (noac ? NFS_MOUNT_NOAC : 0); - if (nfs_mount_version >= 2) - data.flags |= (tcp ? NFS_MOUNT_TCP : 0); - if (nfs_mount_version >= 3) - data.flags |= (nolock ? NFS_MOUNT_NONLM : 0); - if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) { - bb_error_msg("NFSv%d not supported", nfsvers); - goto fail; - } - if (nfsvers && !mountvers) - mountvers = (nfsvers < 3) ? 1 : nfsvers; - if (nfsvers && nfsvers < mountvers) { - mountvers = nfsvers; - } - - /* Adjust options if none specified */ - if (!data.timeo) - data.timeo = tcp ? 70 : 7; - -#ifdef NFS_MOUNT_DEBUG - printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n", - data.rsize, data.wsize, data.timeo, data.retrans); - printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n", - data.acregmin, data.acregmax, data.acdirmin, data.acdirmax); - printf("port = %d, bg = %d, retry = %d, flags = %.8x\n", - port, bg, retry, data.flags); - printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n", - mountprog, mountvers, nfsprog, nfsvers); - printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n", - (data.flags & NFS_MOUNT_SOFT) != 0, - (data.flags & NFS_MOUNT_INTR) != 0, - (data.flags & NFS_MOUNT_POSIX) != 0, - (data.flags & NFS_MOUNT_NOCTO) != 0, - (data.flags & NFS_MOUNT_NOAC) != 0); - printf("tcp = %d\n", - (data.flags & NFS_MOUNT_TCP) != 0); -#endif - - data.version = nfs_mount_version; - - if (vfsflags & MS_REMOUNT) - goto do_mount; - - /* - * If the previous mount operation on the same host was - * backgrounded, and the "bg" for this mount is also set, - * give up immediately, to avoid the initial timeout. - */ - if (bg && we_saw_this_host_before(hostname)) { - daemonized = daemonize(); /* parent or error */ - if (daemonized <= 0) { /* parent or error */ - retval = -daemonized; - goto ret; - } - } - - /* create mount daemon client */ - /* See if the nfs host = mount host. */ - if (mounthost) { - if (mounthost[0] >= '0' && mounthost[0] <= '9') { - mount_server_addr.sin_family = AF_INET; - mount_server_addr.sin_addr.s_addr = inet_addr(hostname); - } else { - hp = gethostbyname(mounthost); - if (hp == NULL) { - bb_herror_msg("%s", mounthost); - goto fail; - } else { - if (hp->h_length > sizeof(struct in_addr)) { - bb_error_msg("got bad hp->h_length?"); - hp->h_length = sizeof(struct in_addr); - } - mount_server_addr.sin_family = AF_INET; - memcpy(&mount_server_addr.sin_addr, - hp->h_addr, hp->h_length); - } - } - } - - /* - * The following loop implements the mount retries. When the mount - * times out, and the "bg" option is set, we background ourself - * and continue trying. - * - * The case where the mount point is not present and the "bg" - * option is set, is treated as a timeout. This is done to - * support nested mounts. - * - * The "retry" count specified by the user is the number of - * minutes to retry before giving up. - */ - { - struct timeval total_timeout; - struct timeval retry_timeout; - struct pmap* pm_mnt; - time_t t; - time_t prevt; - time_t timeout; - - retry_timeout.tv_sec = 3; - retry_timeout.tv_usec = 0; - total_timeout.tv_sec = 20; - total_timeout.tv_usec = 0; - timeout = time(NULL) + 60 * retry; - prevt = 0; - t = 30; -retry: - /* be careful not to use too many CPU cycles */ - if (t - prevt < 30) - sleep(30); - - pm_mnt = get_mountport(&mount_server_addr, - mountprog, - mountvers, - proto, - mountport); - nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers; - - /* contact the mount daemon via TCP */ - mount_server_addr.sin_port = htons(pm_mnt->pm_port); - msock = RPC_ANYSOCK; - - switch (pm_mnt->pm_prot) { - case IPPROTO_UDP: - mclient = clntudp_create(&mount_server_addr, - pm_mnt->pm_prog, - pm_mnt->pm_vers, - retry_timeout, - &msock); - if (mclient) - break; - mount_server_addr.sin_port = htons(pm_mnt->pm_port); - msock = RPC_ANYSOCK; - case IPPROTO_TCP: - mclient = clnttcp_create(&mount_server_addr, - pm_mnt->pm_prog, - pm_mnt->pm_vers, - &msock, 0, 0); - break; - default: - mclient = 0; - } - if (!mclient) { - if (!daemonized && prevt == 0) - error_msg_rpc(clnt_spcreateerror(" ")); - } else { - enum clnt_stat clnt_stat; - /* try to mount hostname:pathname */ - mclient->cl_auth = authunix_create_default(); - - /* make pointers in xdr_mountres3 NULL so - * that xdr_array allocates memory for us - */ - memset(&status, 0, sizeof(status)); - - if (pm_mnt->pm_vers == 3) - clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT, - (xdrproc_t) xdr_dirpath, - (caddr_t) &pathname, - (xdrproc_t) xdr_mountres3, - (caddr_t) &status, - total_timeout); - else - clnt_stat = clnt_call(mclient, MOUNTPROC_MNT, - (xdrproc_t) xdr_dirpath, - (caddr_t) &pathname, - (xdrproc_t) xdr_fhstatus, - (caddr_t) &status, - total_timeout); - - if (clnt_stat == RPC_SUCCESS) - goto prepare_kernel_data; /* we're done */ - if (errno != ECONNREFUSED) { - error_msg_rpc(clnt_sperror(mclient, " ")); - goto fail; /* don't retry */ - } - /* Connection refused */ - if (!daemonized && prevt == 0) /* print just once */ - error_msg_rpc(clnt_sperror(mclient, " ")); - auth_destroy(mclient->cl_auth); - clnt_destroy(mclient); - mclient = 0; - close(msock); - } - - /* Timeout. We are going to retry... maybe */ - - if (!bg) - goto fail; - if (!daemonized) { - daemonized = daemonize(); - if (daemonized <= 0) { /* parent or error */ - retval = -daemonized; - goto ret; - } - } - prevt = t; - t = time(NULL); - if (t >= timeout) - /* TODO error message */ - goto fail; - - goto retry; - } - -prepare_kernel_data: - - if (nfsvers == 2) { - if (status.nfsv2.fhs_status != 0) { - bb_error_msg("%s:%s failed, reason given by server: %s", - hostname, pathname, - nfs_strerror(status.nfsv2.fhs_status)); - goto fail; - } - memcpy(data.root.data, - (char *) status.nfsv2.fhstatus_u.fhs_fhandle, - NFS_FHSIZE); - data.root.size = NFS_FHSIZE; - memcpy(data.old_root.data, - (char *) status.nfsv2.fhstatus_u.fhs_fhandle, - NFS_FHSIZE); - } else { - fhandle3 *my_fhandle; - if (status.nfsv3.fhs_status != 0) { - bb_error_msg("%s:%s failed, reason given by server: %s", - hostname, pathname, - nfs_strerror(status.nfsv3.fhs_status)); - goto fail; - } - my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle; - memset(data.old_root.data, 0, NFS_FHSIZE); - memset(&data.root, 0, sizeof(data.root)); - data.root.size = my_fhandle->fhandle3_len; - memcpy(data.root.data, - (char *) my_fhandle->fhandle3_val, - my_fhandle->fhandle3_len); - - data.flags |= NFS_MOUNT_VER3; - } - - /* create nfs socket for kernel */ - - if (tcp) { - if (nfs_mount_version < 3) { - bb_error_msg("NFS over TCP is not supported"); - goto fail; - } - fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); - } else - fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (fsock < 0) { - bb_perror_msg("nfs socket"); - goto fail; - } - if (bindresvport(fsock, 0) < 0) { - bb_perror_msg("nfs bindresvport"); - goto fail; - } - if (port == 0) { - server_addr.sin_port = PMAPPORT; - port = pmap_getport(&server_addr, nfsprog, nfsvers, - tcp ? IPPROTO_TCP : IPPROTO_UDP); - if (port == 0) - port = NFS_PORT; -#ifdef NFS_MOUNT_DEBUG - else - printf("used portmapper to find NFS port\n"); -#endif - } -#ifdef NFS_MOUNT_DEBUG - printf("using port %d for nfs daemon\n", port); -#endif - server_addr.sin_port = htons(port); - - /* prepare data structure for kernel */ - - data.fd = fsock; - memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr)); - strncpy(data.hostname, hostname, sizeof(data.hostname)); - - /* clean up */ - - auth_destroy(mclient->cl_auth); - clnt_destroy(mclient); - close(msock); - - if (bg) { - /* We must wait until mount directory is available */ - struct stat statbuf; - int delay = 1; - while (stat(mp->mnt_dir, &statbuf) == -1) { - if (!daemonized) { - daemonized = daemonize(); - if (daemonized <= 0) { /* parent or error */ - retval = -daemonized; - goto ret; - } - } - sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */ - delay *= 2; - if (delay > 30) - delay = 30; - } - } - -do_mount: /* perform actual mount */ - - mp->mnt_type = "nfs"; - retval = mount_it_now(mp, vfsflags, (char*)&data); - goto ret; - -fail: /* abort */ - - if (msock != -1) { - if (mclient) { - auth_destroy(mclient->cl_auth); - clnt_destroy(mclient); - } - close(msock); - } - if (fsock != -1) - close(fsock); - -ret: - free(hostname); - free(mounthost); - free(filteropts); - return retval; -} |