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    Contents of /trunk/mkinitrd-magellan/klibc/usr/kinit/nfsroot.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
    File MIME type: text/plain
    File size: 2499 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    1 #include <arpa/inet.h>
    2 #include <sys/mount.h>
    3 #include <sys/stat.h>
    4 #include <stdio.h>
    5 #include <stdlib.h>
    6 #include <string.h>
    7 #include <assert.h>
    8
    9 #include "ipconfig.h"
    10 #include "kinit.h"
    11 #include "netdev.h"
    12 #include "nfsmount.h"
    13
    14 static char *sub_client(__u32 client, char *path, size_t len)
    15 {
    16 struct in_addr addr = { client };
    17 char buf[len];
    18
    19 if (strstr(path, "%s") != NULL) {
    20 if (client == INADDR_NONE) {
    21 fprintf(stderr, "Root-NFS: no client address\n");
    22 exit(1);
    23 }
    24
    25 snprintf(buf, len, path, inet_ntoa(addr));
    26 strcpy(path, buf);
    27 }
    28
    29 return path;
    30 }
    31
    32 #define NFS_ARGC 6
    33 #define MOUNT_POINT "/root"
    34
    35 int mount_nfs_root(int argc, char *argv[], int flags)
    36 {
    37 (void)flags; /* FIXME - don't ignore this */
    38
    39 struct in_addr addr = { INADDR_NONE };
    40 __u32 client = INADDR_NONE;
    41 const int len = 1024;
    42 struct netdev *dev;
    43 char *mtpt = MOUNT_POINT;
    44 char *path = NULL;
    45 char *dev_bootpath = NULL;
    46 char root[len];
    47 char *x, *opts;
    48 int ret = 0;
    49 int a = 1;
    50 char *nfs_argv[NFS_ARGC + 1] = { "NFS-Mount" };
    51
    52 for (dev = ifaces; dev; dev = dev->next) {
    53 if (dev->ip_server != INADDR_NONE &&
    54 dev->ip_server != INADDR_ANY) {
    55 addr.s_addr = dev->ip_server;
    56 client = dev->ip_addr;
    57 dev_bootpath = dev->bootpath;
    58 break;
    59 }
    60 if (dev->ip_addr != INADDR_NONE && dev->ip_addr != INADDR_ANY) {
    61 client = dev->ip_addr;
    62 }
    63 }
    64
    65 /*
    66 * if the "nfsroot" option is set then it overrides
    67 * bootpath supplied by the boot server.
    68 */
    69 if ((path = get_arg(argc, argv, "nfsroot=")) == NULL) {
    70 if ((path = dev_bootpath) == NULL || path[0] == '\0')
    71 /* no path - set a default */
    72 path = (char *)"/tftpboot/%s";
    73 } else if (dev_bootpath && dev_bootpath[0] != '\0')
    74 fprintf(stderr,
    75 "nfsroot=%s overrides boot server bootpath %s\n",
    76 path, dev_bootpath);
    77
    78 if ((opts = strchr(path, ',')) != NULL) {
    79 *opts++ = '\0';
    80 nfs_argv[a++] = (char *)"-o";
    81 nfs_argv[a++] = opts;
    82 }
    83
    84 if ((x = strchr(path, ':')) == NULL) {
    85 if (addr.s_addr == INADDR_NONE) {
    86 fprintf(stderr, "Root-NFS: no server defined\n");
    87 exit(1);
    88 }
    89
    90 snprintf(root, len, "%s:%s", inet_ntoa(addr), path);
    91 } else {
    92 strcpy(root, path);
    93 }
    94
    95 nfs_argv[a++] = sub_client(client, root, len);
    96
    97 DEBUG(("NFS-Root: mounting %s on %s with options \"%s\"\n",
    98 nfs_argv[a-1], mtpt, opts ? opts : ""));
    99
    100 nfs_argv[a++] = mtpt;
    101 nfs_argv[a] = NULL;
    102 assert(a <= NFS_ARGC);
    103
    104 dump_args(a, nfs_argv);
    105
    106 if ((ret = nfsmount_main(a, nfs_argv)) != 0) {
    107 ret = -1;
    108 goto done;
    109 }
    110
    111 done:
    112 return ret;
    113 }