nfsmount: remove some really old code (for kernels 1.x!) + small cleanups.
This commit is contained in:
Denis Vlasenko
parent
d2b13eab98
commit
3077294615
@ -345,6 +345,7 @@ enum {
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* nfs_mount_version according to the sources seen at compile time.
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*/
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static int nfs_mount_version;
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static int kernel_version;
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/*
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* Unfortunately, the kernel prints annoying console messages
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@ -360,8 +361,6 @@ static int nfs_mount_version;
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static void
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find_kernel_nfs_mount_version(void)
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{
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static int kernel_version = 0;
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if (kernel_version)
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return;
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@ -372,14 +371,11 @@ find_kernel_nfs_mount_version(void)
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if (kernel_version < KERNEL_VERSION(2,1,32))
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nfs_mount_version = 1;
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else if (kernel_version < KERNEL_VERSION(2,2,18) ||
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(kernel_version >= KERNEL_VERSION(2,3,0) &&
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(kernel_version >= KERNEL_VERSION(2,3,0) &&
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kernel_version < KERNEL_VERSION(2,3,99)))
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nfs_mount_version = 3;
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else
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nfs_mount_version = 4; /* since 2.3.99pre4 */
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/* else v4 since 2.3.99pre4 */
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}
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if (nfs_mount_version > 4)
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nfs_mount_version = 4;
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}
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static struct pmap *
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@ -433,14 +429,31 @@ next:
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int nfsmount(const char *spec, const char *node, int *flags,
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char **mount_opts, int running_bg)
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{
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/* prev_bg_host is a -o bg support:
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* "bg: if the first NFS mount attempt times out,
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* retry the mount in the background.
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* After a mount operation is backgrounded,
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* all subsequent mounts on the same NFS server
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* will be backgrounded immediately, without first
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* attempting the mount. A missing mount point is treated
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* as a timeout, to allow for nested NFS mounts."
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*
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* But current implementation is a dirty hack -
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* it works only if all mounts are to one host!
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* IOW: think what will happen if you have this sequence:
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* mount a.a.a.a:/dir /mnt/a -o bg
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* mount b.b.b.b:/dir /mnt/b -o bg
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* mount a.a.a.a:/dir /mnt/a -o bg
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* mount b.b.b.b:/dir /mnt/b -o bg
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*/
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static char *prev_bg_host;
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char hostdir[1024];
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char *hostdir;
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CLIENT *mclient;
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char *hostname;
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char *pathname;
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char *old_opts;
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char *mounthost = NULL;
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char new_opts[1024];
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char *mounthost;
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struct timeval total_timeout;
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enum clnt_stat clnt_stat;
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struct nfs_mount_data data;
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@ -481,27 +494,26 @@ int nfsmount(const char *spec, const char *node, int *flags,
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find_kernel_nfs_mount_version();
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/* NB: old_opts and hostdir must be free()d prior to return! */
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old_opts = NULL;
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mounthost = NULL;
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retval = EX_FAIL;
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msock = fsock = -1;
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mclient = NULL;
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if (strlen(spec) >= sizeof(hostdir)) {
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bb_error_msg("excessively long host:dir argument");
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goto fail;
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}
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strcpy(hostdir, spec);
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if ((s = strchr(hostdir, ':'))) {
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hostname = hostdir;
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pathname = s + 1;
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hostdir = xstrdup(spec);
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/* mount_main() guarantees that ':' is there */
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s = strchr(hostdir, ':');
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hostname = hostdir;
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pathname = s + 1;
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*s = '\0';
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/* Ignore all but first hostname in replicated mounts
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until they can be fully supported. (mack@sgi.com) */
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s = strchr(hostdir, ',');
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if (s) {
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*s = '\0';
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/* Ignore all but first hostname in replicated mounts
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until they can be fully supported. (mack@sgi.com) */
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if ((s = strchr(hostdir, ','))) {
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*s = '\0';
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bb_error_msg("warning: multiple hostnames not supported");
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}
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} else {
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bb_error_msg("directory to mount not in host:dir format");
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goto fail;
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bb_error_msg("warning: multiple hostnames not supported");
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}
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server_addr.sin_family = AF_INET;
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@ -509,34 +521,29 @@ int nfsmount(const char *spec, const char *node, int *flags,
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if (!inet_aton(hostname, &server_addr.sin_addr))
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#endif
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{
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if ((hp = gethostbyname(hostname)) == NULL) {
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hp = gethostbyname(hostname);
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if (hp == NULL) {
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bb_herror_msg("%s", hostname);
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goto fail;
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} else {
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if (hp->h_length > sizeof(struct in_addr)) {
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bb_error_msg("got bad hp->h_length");
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hp->h_length = sizeof(struct in_addr);
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}
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memcpy(&server_addr.sin_addr,
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hp->h_addr, hp->h_length);
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}
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if (hp->h_length > sizeof(struct in_addr)) {
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bb_error_msg("got bad hp->h_length");
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hp->h_length = sizeof(struct in_addr);
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}
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memcpy(&server_addr.sin_addr,
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hp->h_addr, hp->h_length);
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}
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memcpy(&mount_server_addr, &server_addr, sizeof (mount_server_addr));
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memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
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/* add IP address to mtab options for use when unmounting */
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s = inet_ntoa(server_addr.sin_addr);
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old_opts = *mount_opts;
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if (!old_opts)
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old_opts = "";
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if (strlen(old_opts) + strlen(s) + 10 >= sizeof(new_opts)) {
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bb_error_msg("excessively long option argument");
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goto fail;
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}
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sprintf(new_opts, "%s%saddr=%s",
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old_opts, *old_opts ? "," : "", s);
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*mount_opts = xstrdup(new_opts);
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old_opts = xstrdup("");
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*mount_opts = xasprintf("%s%saddr=%s",
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old_opts, *old_opts ? "," : "", s);
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/* Set default options.
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* rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
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@ -570,7 +577,8 @@ int nfsmount(const char *spec, const char *node, int *flags,
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/* parse options */
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for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
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if ((opteq = strchr(opt, '='))) {
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opteq = strchr(opt, '=');
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if (opteq) {
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val = atoi(opteq + 1);
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*opteq = '\0';
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if (!strcmp(opt, "rsize"))
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@ -681,8 +689,8 @@ int nfsmount(const char *spec, const char *node, int *flags,
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if (nfs_mount_version >= 3)
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data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
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if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
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bb_error_msg("NFSv%d not supported!", nfsvers);
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return 1;
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bb_error_msg("NFSv%d not supported", nfsvers);
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goto fail;
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}
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if (nfsvers && !mountvers)
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mountvers = (nfsvers < 3) ? 1 : nfsvers;
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@ -727,7 +735,7 @@ int nfsmount(const char *spec, const char *node, int *flags,
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prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
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if (retry > 0)
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retval = EX_BG;
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return retval;
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goto ret;
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}
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/* create mount daemon client */
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@ -941,17 +949,6 @@ int nfsmount(const char *spec, const char *node, int *flags,
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printf("using port %d for nfs daemon\n", port);
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#endif
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server_addr.sin_port = htons(port);
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/*
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* connect() the socket for kernels 1.3.10 and below only,
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* to avoid problems with multihomed hosts.
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* --Swen
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*/
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if (get_linux_version_code() <= KERNEL_VERSION(2,3,10)
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&& connect(fsock, (struct sockaddr *) &server_addr,
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sizeof (server_addr)) < 0) {
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perror("nfs connect");
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goto fail;
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}
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/* prepare data structure for kernel */
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@ -967,7 +964,9 @@ int nfsmount(const char *spec, const char *node, int *flags,
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copy_data_and_return:
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*mount_opts = xrealloc(*mount_opts, sizeof(data));
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memcpy(*mount_opts, &data, sizeof(data));
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return 0;
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retval = 0;
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goto ret;
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/* abort */
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@ -981,5 +980,9 @@ fail:
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}
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if (fsock != -1)
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close(fsock);
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ret:
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free(hostdir);
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free(old_opts);
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return retval;
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}
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