{"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)
{
#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;
// 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
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.
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 */
+++ /dev/null
-/* 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;
-}
projects / oweals / busybox.git / commitdiff