*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
- * Copyright (C) 2005 by Rob Landley <rob@landley.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <limits.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <mntent.h>
-#include <ctype.h>
-#include <sys/mount.h>
-#include <fcntl.h> // for CONFIG_FEATURE_MOUNT_LOOP
-#include <sys/ioctl.h> // for CONFIG_FEATURE_MOUNT_LOOP
+/* Design notes: There is no spec for mount. Remind me to write one.
+
+ mount_main() calls singlemount() which calls mount_it_now().
+
+ mount_main() can loop through /etc/fstab for mount -a
+ singlemount() can loop through /etc/filesystems for fstype detection.
+ mount_it_now() does the actual mount.
+*/
+
#include "busybox.h"
+#include <mntent.h>
-/* This is just a warning of a common mistake. Possibly this should be a
- * uclibc faq entry rather than in busybox... */
-#if ENABLE_NFSMOUNT && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
-#error "You need to build uClibc with UCLIBC_HAS_RPC for busybox mount with NFS support to compile."
-#endif
+/* Needed for nfs support only... */
+#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>
-// These two aren't always defined in old headers
-#ifndef MS_BIND
-#define MS_BIND 4096
-#endif
-#ifndef MS_MOVE
-#define MS_MOVE 8192
-#endif
-/* Consume standard mount options (from -o options or --options).
- * Set appropriate flags and collect unrecognized ones as a comma separated
- * string to pass to kernel */
+// Not real flags, but we want to be able to check for this.
+#define MOUNT_NOAUTO (1<<29)
+#define MOUNT_SWAP (1<<30)
+
+/* Standard mount options (from -o options or --options), with corresponding
+ * flags */
struct {
- const char *name;
+ char *name;
long flags;
-} static const mount_options[] = {
- {"loop", 0},
- {"defaults", 0},
- {"noauto", 0},
- {"ro", MS_RDONLY},
- {"rw", ~MS_RDONLY},
- {"nosuid", MS_NOSUID},
- {"suid", ~MS_NOSUID},
- {"dev", ~MS_NODEV},
- {"nodev", MS_NODEV},
- {"exec", ~MS_NOEXEC},
- {"noexec", MS_NOEXEC},
- {"sync", MS_SYNCHRONOUS},
- {"async", ~MS_SYNCHRONOUS},
- {"remount", MS_REMOUNT},
- {"atime", MS_NOATIME},
- {"noatime", MS_NOATIME},
- {"diratime", MS_NODIRATIME},
- {"nodiratime", MS_NODIRATIME},
- {"bind", MS_BIND},
- {"move", MS_MOVE}
+} static mount_options[] = {
+ // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
+
+ USE_FEATURE_MOUNT_LOOP(
+ {"loop", 0},
+ )
+
+ USE_FEATURE_MOUNT_FSTAB(
+ {"defaults", 0},
+ {"quiet", 0},
+ {"noauto",MOUNT_NOAUTO},
+ {"swap",MOUNT_SWAP},
+ )
+
+ USE_FEATURE_MOUNT_FLAGS(
+ // vfs flags
+ {"nosuid", MS_NOSUID},
+ {"suid", ~MS_NOSUID},
+ {"dev", ~MS_NODEV},
+ {"nodev", MS_NODEV},
+ {"exec", ~MS_NOEXEC},
+ {"noexec", MS_NOEXEC},
+ {"sync", MS_SYNCHRONOUS},
+ {"async", ~MS_SYNCHRONOUS},
+ {"atime", ~MS_NOATIME},
+ {"noatime", MS_NOATIME},
+ {"diratime", ~MS_NODIRATIME},
+ {"nodiratime", MS_NODIRATIME},
+ {"loud", ~MS_SILENT},
+
+ // action flags
+
+ {"bind", MS_BIND},
+ {"move", MS_MOVE},
+ {"shared", MS_SHARED},
+ {"slave", MS_SLAVE},
+ {"private", MS_PRIVATE},
+ {"unbindable", MS_UNBINDABLE},
+ {"rshared", MS_SHARED|MS_RECURSIVE},
+ {"rslave", MS_SLAVE|MS_RECURSIVE},
+ {"rprivate", MS_SLAVE|MS_RECURSIVE},
+ {"runbindable", MS_UNBINDABLE|MS_RECURSIVE},
+ )
+
+ // Always understood.
+
+ {"ro", MS_RDONLY}, // vfs flag
+ {"rw", ~MS_RDONLY}, // vfs flag
+ {"remount", MS_REMOUNT}, // action flag
};
-/* Uses the mount_options list above */
-static void parse_mount_options(char *options, int *flags, char **strflags)
+#define VECTOR_SIZE(v) (sizeof(v) / sizeof((v)[0]))
+
+/* Append mount options to string */
+static void append_mount_options(char **oldopts, char *newopts)
+{
+ if (*oldopts && **oldopts) {
+ /* do not insert options which are already there */
+ while (newopts[0]) {
+ char *p;
+ int len = strlen(newopts);
+ p = strchr(newopts, ',');
+ if (p) len = p - newopts;
+ p = *oldopts;
+ while (1) {
+ if (!strncmp(p,newopts,len) && (p[len]==',' || p[len]==0))
+ goto skip;
+ p = strchr(p,',');
+ if(!p) break;
+ p++;
+ }
+ p = xasprintf("%s,%.*s", *oldopts, len, newopts);
+ free(*oldopts);
+ *oldopts = p;
+skip:
+ newopts += len;
+ while (newopts[0] == ',') newopts++;
+ }
+ } else {
+ if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
+ *oldopts = xstrdup(newopts);
+ }
+}
+
+/* Use the mount_options list to parse options into flags.
+ * Also return list of unrecognized options if unrecognized!=NULL */
+static int parse_mount_options(char *options, char **unrecognized)
{
+ int flags = MS_SILENT;
+
// Loop through options
- for(;;) {
+ for (;;) {
int i;
char *comma = strchr(options, ',');
- if(comma) *comma = 0;
+ if (comma) *comma = 0;
// Find this option in mount_options
- for(i = 0; i < (sizeof(mount_options) / sizeof(*mount_options)); i++) {
- if(!strcasecmp(mount_options[i].name, options)) {
+ for (i = 0; i < VECTOR_SIZE(mount_options); i++) {
+ if (!strcasecmp(mount_options[i].name, options)) {
long fl = mount_options[i].flags;
- if(fl < 0) *flags &= fl;
- else *flags |= fl;
+ if (fl < 0) flags &= fl;
+ else flags |= fl;
break;
}
}
- // Unrecognized mount option?
- if(i == (sizeof(mount_options) / sizeof(*mount_options))) {
+ // If unrecognized not NULL, append unrecognized mount options */
+ if (unrecognized && i == VECTOR_SIZE(mount_options)) {
// Add it to strflags, to pass on to kernel
- i = *strflags ? strlen(*strflags) : 0;
- *strflags = xrealloc(*strflags, i+strlen(options)+2);
+ i = *unrecognized ? strlen(*unrecognized) : 0;
+ *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
+
// Comma separated if it's not the first one
- if(i) (*strflags)[i++] = ',';
- strcpy((*strflags)+i, options);
+ if (i) (*unrecognized)[i++] = ',';
+ strcpy((*unrecognized)+i, options);
}
+
// Advance to next option, or finish
- if(comma) {
+ if (comma) {
*comma = ',';
options = ++comma;
} else break;
}
+
+ return flags;
}
-/* This does the work */
+// Return a list of all block device backed filesystems
-extern int mount_main(int argc, char **argv)
+static llist_t *get_block_backed_filesystems(void)
{
- char *string_flags = 0, *fsType = 0, *blockDevice = 0, *directory = 0,
- *loopFile = 0, *buf = 0,
- *files[] = {"/etc/filesystems", "/proc/filesystems", 0};
- int i, opt, all = FALSE, fakeIt = FALSE, allowWrite = FALSE,
- rc = 1, useMtab = ENABLE_FEATURE_MTAB_SUPPORT;
- int flags=0xc0ed0000; // Needed for linux 2.2, ignored by 2.4 and 2.6.
- FILE *file = 0,*f = 0;
- char path[PATH_MAX*2];
- struct mntent m;
- struct stat statbuf;
+ char *fs, *buf,
+ *filesystems[] = {"/etc/filesystems", "/proc/filesystems", 0};
+ llist_t *list = 0;
+ int i;
+ FILE *f;
- /* parse long options, like --bind and --move. Note that -o option
- * and --option are synonymous. Yes, this means --remount,rw works. */
+ for (i = 0; filesystems[i]; i++) {
+ f = fopen(filesystems[i], "r");
+ if (!f) continue;
+
+ for (fs = buf = 0; (fs = buf = bb_get_chomped_line_from_file(f));
+ free(buf))
+ {
+ if (!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
- for(i = opt = 0; i < argc; i++) {
- if(argv[i][0] == '-' && argv[i][1] == '-')
- parse_mount_options(argv[i]+2, &flags, &string_flags);
- else argv[opt++] = argv[i];
+ while (isspace(*fs)) fs++;
+ if (*fs=='#' || *fs=='*') continue;
+ if (!*fs) continue;
+
+ llist_add_to_end(&list,xstrdup(fs));
+ }
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
}
- argc = opt;
- // Parse remaining options
+ return list;
+}
- while((opt = getopt(argc, argv, "o:t:rwafnv")) > 0) {
- switch (opt) {
- case 'o':
- parse_mount_options(optarg, &flags, &string_flags);
- break;
- case 't':
- fsType = optarg;
- break;
- case 'r':
- flags |= MS_RDONLY;
- break;
- case 'w':
- allowWrite=TRUE;
- break;
- case 'a':
- all = TRUE;
- break;
- case 'f':
- fakeIt = TRUE;
- break;
- case 'n':
- useMtab = FALSE;
+llist_t *fslist = 0;
+
+#if ENABLE_FEATURE_CLEAN_UP
+static void delete_block_backed_filesystems(void)
+{
+ llist_free(fslist, free);
+}
+#else
+void delete_block_backed_filesystems(void);
+#endif
+
+#if ENABLE_FEATURE_MTAB_SUPPORT
+static int useMtab = 1;
+static int fakeIt;
+#else
+#define useMtab 0
+#define fakeIt 0
+#endif
+
+// Perform actual mount of specific filesystem at specific location.
+// NB: mp->xxx fields may be trashed on exit
+static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
+{
+ int rc = 0;
+
+ if (fakeIt) goto mtab;
+
+ // Mount, with fallback to read-only if necessary.
+
+ for (;;) {
+ rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
+ vfsflags, filteropts);
+ if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
break;
- case 'v':
- break; // ignore -v
- default:
- bb_show_usage();
- }
+ bb_error_msg("%s is write-protected, mounting read-only",
+ mp->mnt_fsname);
+ vfsflags |= MS_RDONLY;
}
- // If we have no arguments, show currently mounted filesystems
+ // Abort entirely if permission denied.
- if(!all && (optind == argc)) {
- FILE *mountTable = setmntent(bb_path_mtab_file, "r");
+ if (rc && errno == EPERM)
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- if(!mountTable) bb_perror_msg_and_die(bb_path_mtab_file);
+ /* If the mount was successful, and we're maintaining an old-style
+ * mtab file by hand, add the new entry to it now. */
+mtab:
+ if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
+ char *fsname;
+ FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
+ int i;
+
+ if (!mountTable)
+ bb_error_msg("no %s",bb_path_mtab_file);
+
+ // Add vfs string flags
- while (getmntent_r(mountTable,&m,path,sizeof(path))) {
- blockDevice = m.mnt_fsname;
+ for (i=0; mount_options[i].flags != MS_REMOUNT; i++)
+ if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags))
+ append_mount_options(&(mp->mnt_opts), mount_options[i].name);
- // Clean up display a little bit regarding root devie
- if(!strcmp(blockDevice, "rootfs")) continue;
- if(!strcmp(blockDevice, "/dev/root"))
- blockDevice = find_block_device("/");
+ // Remove trailing / (if any) from directory we mounted on
- if(!fsType || !strcmp(m.mnt_type, fsType))
- printf("%s on %s type %s (%s)\n", blockDevice, m.mnt_dir,
- m.mnt_type, m.mnt_opts);
- if(ENABLE_FEATURE_CLEAN_UP && blockDevice != m.mnt_fsname)
- free(blockDevice);
+ i = strlen(mp->mnt_dir) - 1;
+ if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = 0;
+
+ // Convert to canonical pathnames as needed
+
+ mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
+ fsname = 0;
+ if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
+ mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_type = "bind";
}
+ mp->mnt_freq = mp->mnt_passno = 0;
+
+ // Write and close.
+
+ addmntent(mountTable, mp);
endmntent(mountTable);
- return EXIT_SUCCESS;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(mp->mnt_dir);
+ free(fsname);
+ }
}
- /* The next argument is what to mount. if there's an argument after that
- * it's where to mount it. If we're not mounting all, and we have both
- * of these arguments, jump straight to the actual mount. */
+ return rc;
+}
- statbuf.st_mode=0;
- if(optind < argc)
- blockDevice = !stat(argv[optind], &statbuf) ?
- bb_simplify_path(argv[optind]) :
- (ENABLE_FEATURE_CLEAN_UP ? strdup(argv[optind]) : argv[optind]);
- if(optind+1 < argc) directory = bb_simplify_path(argv[optind+1]);
+#if ENABLE_FEATURE_MOUNT_NFS
- // If we don't have to loop through fstab, skip ahead a bit.
+/*
+ * 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.
+ */
- if(!all && optind+1!=argc) goto singlemount;
+/* This is just a warning of a common mistake. Possibly this should be a
+ * uclibc faq entry rather than in busybox... */
+#if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
+#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
+#endif
- // Loop through /etc/fstab entries to look up this entry.
+#define MOUNTPORT 635
+#define MNTPATHLEN 1024
+#define MNTNAMLEN 255
+#define FHSIZE 32
+#define FHSIZE3 64
- if(!(file=setmntent("/etc/fstab","r")))
- bb_perror_msg_and_die("\nCannot read /etc/fstab");
- for(;;) {
+typedef char fhandle[FHSIZE];
- // Get next fstab entry
+typedef struct {
+ unsigned int fhandle3_len;
+ char *fhandle3_val;
+} fhandle3;
- if(!getmntent_r(file,&m,path,sizeof(path))) {
- if(!all)
- bb_perror_msg("Can't find %s in /etc/fstab\n", blockDevice);
- break;
+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[sizeof("unknown nfs status return value: ") + sizeof(int)*3];
+
+ 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(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)
+{
+ int len;
+ while (msg[0] == ' ' || msg[0] == ':') msg++;
+ len = strlen(msg);
+ while (len && msg[len-1] == '\n') len--;
+ bb_error_msg("%.*s", len, msg);
+}
+
+// NB: mp->xxx fields may be trashed on exit
+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 we're mounting all and all doesn't mount this one, skip it.
-
- if(all) {
- if(strstr(m.mnt_opts,"noauto") || strstr(m.mnt_type,"swap"))
- continue;
- flags=0;
-
- /* If we're mounting something specific and this isn't it, skip it.
- * Note we must match both the exact text in fstab (ala "proc") or
- * a full path from root */
-
- } else if(strcmp(blockDevice,m.mnt_fsname) &&
- strcmp(argv[optind],m.mnt_fsname) &&
- strcmp(blockDevice,m.mnt_dir) &&
- strcmp(argv[optind],m.mnt_dir)) continue;
-
- /* Parse flags from /etc/fstab (unless this is a single mount
- * overriding fstab -- note the "all" test above zeroed the flags,
- * to prevent flags from previous entries affecting this one, so
- * the only way we could get here with nonzero flags is a single
- * mount). */
-
- if(!flags) {
- if(ENABLE_FEATURE_CLEAN_UP) free(string_flags);
- string_flags=NULL;
- parse_mount_options(m.mnt_opts, &flags, &string_flags);
+ 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);
+ }
- /* Fill out remaining fields with info from mtab */
+ memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
- if(ENABLE_FEATURE_CLEAN_UP) {
- free(blockDevice);
- blockDevice=strdup(m.mnt_fsname);
- free(directory);
- directory=strdup(m.mnt_type);
- } else {
- blockDevice=m.mnt_fsname;
- directory=m.mnt_dir;
- }
- fsType=m.mnt_type;
+ /* add IP address to mtab options for use when unmounting */
- /* Ok, we're ready to actually mount a specific source on a specific
- * directory now. */
+ 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;
+ }
-singlemount:
+ /* 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;
- // If they said -w, override fstab
+ bg = 0;
+ soft = 0;
+ intr = 0;
+ posix = 0;
+ nocto = 0;
+ nolock = 0;
+ noac = 0;
+ retry = 10000; /* 10000 minutes ~ 1 week */
+ tcp = 0;
- if(allowWrite) flags&=~MS_RDONLY;
+ mountprog = MOUNTPROG;
+ mountvers = 0;
+ port = 0;
+ mountport = 0;
+ nfsprog = 100003;
+ nfsvers = 0;
- // Might this be an NFS filesystem?
+ /* parse options */
- if(ENABLE_NFSMOUNT && (!fsType || !strcmp(fsType,"nfs")) &&
- strchr(blockDevice, ':') != NULL)
- {
- if(nfsmount(blockDevice, directory, &flags, &string_flags, 1))
- bb_perror_msg("nfsmount failed");
+ for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
+ char *opteq = strchr(opt, '=');
+ if (opteq) {
+ int val = xatoi_u(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 {
- rc = 0;
- fsType="nfs";
- // Strangely enough, nfsmount() doesn't actually mount()
- goto mount_it_now;
+ 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;
+
+ 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 {
-
- // Do we need to allocate a loopback device?
+ enum clnt_stat clnt_stat;
+ /* try to mount hostname:pathname */
+ mclient->cl_auth = authunix_create_default();
- if(ENABLE_FEATURE_MOUNT_LOOP && !fakeIt && S_ISREG(statbuf.st_mode))
- {
- loopFile = blockDevice;
- blockDevice = 0;
- switch(set_loop(&blockDevice, loopFile, 0)) {
- case 0:
- case 1:
- break;
- default:
- bb_error_msg_and_die(
- errno == EPERM || errno == EACCES ?
- bb_msg_perm_denied_are_you_root :
- "Couldn't setup loop device");
- break;
+ /* 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;
+ }
+ 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;
- /* If we know the fstype (or don't need to), jump straight
- * to the actual mount. */
+fail: /* abort */
- if(fsType || (flags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
- goto mount_it_now;
+ if (msock != -1) {
+ if (mclient) {
+ auth_destroy(mclient->cl_auth);
+ clnt_destroy(mclient);
}
-
- // Loop through filesystem types until mount succeeds or we run out
-
- for(i = 0; files[i] && rc; i++) {
- f = fopen(files[i], "r");
- if(!f) continue;
- // Get next block device backed filesystem
- for(buf = 0; (buf = fsType = bb_get_chomped_line_from_file(f));
- free(buf))
+ close(msock);
+ }
+ if (fsock != -1)
+ close(fsock);
+
+ret:
+ free(hostname);
+ free(mounthost);
+ free(filteropts);
+ return retval;
+}
+
+#else /* !ENABLE_FEATURE_MOUNT_NFS */
+
+/* Never called. Call should be optimized out. */
+int nfsmount(struct mntent *mp, int vfsflags, char *filteropts);
+
+#endif /* !ENABLE_FEATURE_MOUNT_NFS */
+
+// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
+// type detection. Returns 0 for success, nonzero for failure.
+// NB: mp->xxx fields may be trashed on exit
+static int singlemount(struct mntent *mp, int ignore_busy)
+{
+ int rc = -1, vfsflags;
+ char *loopFile = 0, *filteropts = 0;
+ llist_t *fl = 0;
+ struct stat st;
+
+ vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
+
+ // Treat fstype "auto" as unspecified.
+
+ if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
+
+ // Might this be an CIFS filesystem?
+
+ if (ENABLE_FEATURE_MOUNT_CIFS &&
+ (!mp->mnt_type || !strcmp(mp->mnt_type,"cifs")) &&
+ (mp->mnt_fsname[0]==mp->mnt_fsname[1] && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')))
+ {
+ struct hostent *he;
+ char ip[32], *s;
+
+ rc = 1;
+ // Replace '/' with '\' and verify that unc points to "//server/share".
+
+ for (s = mp->mnt_fsname; *s; ++s)
+ if (*s == '/') *s = '\\';
+
+ // get server IP
+
+ s = strrchr(mp->mnt_fsname, '\\');
+ if (s == mp->mnt_fsname+1) goto report_error;
+ *s = 0;
+ he = gethostbyname(mp->mnt_fsname+2);
+ *s = '\\';
+ if (!he) goto report_error;
+
+ // Insert ip=... option into string flags. (NOTE: Add IPv6 support.)
+
+ sprintf(ip, "ip=%d.%d.%d.%d", he->h_addr[0], he->h_addr[1],
+ he->h_addr[2], he->h_addr[3]);
+ parse_mount_options(ip, &filteropts);
+
+ // compose new unc '\\server-ip\share'
+
+ mp->mnt_fsname = xasprintf("\\\\%s%s", ip+3,
+ strchr(mp->mnt_fsname+2,'\\'));
+
+ // lock is required
+ vfsflags |= MS_MANDLOCK;
+
+ mp->mnt_type = "cifs";
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (ENABLE_FEATURE_CLEAN_UP) free(mp->mnt_fsname);
+ goto report_error;
+ }
+
+ // Might this be an NFS filesystem?
+
+ if (ENABLE_FEATURE_MOUNT_NFS &&
+ (!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
+ strchr(mp->mnt_fsname, ':') != NULL)
+ {
+ rc = nfsmount(mp, vfsflags, filteropts);
+ goto report_error;
+ }
+
+ // Look at the file. (Not found isn't a failure for remount, or for
+ // a synthetic filesystem like proc or sysfs.)
+
+ if (!lstat(mp->mnt_fsname, &st) && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
+ {
+ // Do we need to allocate a loopback device for it?
+
+ if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
+ loopFile = bb_simplify_path(mp->mnt_fsname);
+ mp->mnt_fsname = 0;
+ switch (set_loop(&(mp->mnt_fsname), loopFile, 0)) {
+ case 0:
+ case 1:
+ break;
+ default:
+ bb_error_msg( errno == EPERM || errno == EACCES
+ ? bb_msg_perm_denied_are_you_root
+ : "cannot setup loop device");
+ return errno;
+ }
+
+ // Autodetect bind mounts
+
+ } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
+ vfsflags |= MS_BIND;
+ }
+
+ /* If we know the fstype (or don't need to), jump straight
+ * to the actual mount. */
+
+ if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
+ rc = mount_it_now(mp, vfsflags, filteropts);
+
+ // Loop through filesystem types until mount succeeds or we run out
+
+ else {
+
+ /* Initialize list of block backed filesystems. This has to be
+ * done here so that during "mount -a", mounts after /proc shows up
+ * can autodetect. */
+
+ if (!fslist) {
+ fslist = get_block_backed_filesystems();
+ if (ENABLE_FEATURE_CLEAN_UP && fslist)
+ atexit(delete_block_backed_filesystems);
+ }
+
+ for (fl = fslist; fl; fl = fl->link) {
+ mp->mnt_type = fl->data;
+ rc = mount_it_now(mp, vfsflags, filteropts);
+ if (!rc) break;
+ }
+ }
+
+ // If mount failed, clean up loop file (if any).
+
+ if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
+ del_loop(mp->mnt_fsname);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(loopFile);
+ free(mp->mnt_fsname);
+ }
+ }
+
+report_error:
+ if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
+
+ if (rc && errno == EBUSY && ignore_busy) rc = 0;
+ if (rc < 0)
+ /* perror here sometimes says "mounting ... on ... failed: Success" */
+ bb_error_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
+
+ return rc;
+}
+
+// Parse options, if necessary parse fstab/mtab, and call singlemount for
+// each directory to be mounted.
+
+int mount_main(int argc, char **argv)
+{
+ enum { OPT_ALL = 0x10 };
+
+ char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0;
+ char *opt_o;
+ const char *fstabname;
+ FILE *fstab;
+ int i, j, rc = 0;
+ unsigned opt;
+ struct mntent mtpair[2], *mtcur = mtpair;
+
+ /* parse long options, like --bind and --move. Note that -o option
+ * and --option are synonymous. Yes, this means --remount,rw works. */
+
+ for (i = j = 0; i < argc; i++) {
+ if (argv[i][0] == '-' && argv[i][1] == '-') {
+ append_mount_options(&cmdopts,argv[i]+2);
+ } else argv[j++] = argv[i];
+ }
+ argv[j] = 0;
+ argc = j;
+
+ // Parse remaining options
+
+ opt = getopt32(argc, argv, "o:t:rwanfvs", &opt_o, &fstype);
+ if (opt & 0x1) append_mount_options(&cmdopts, opt_o); // -o
+ //if (opt & 0x2) // -t
+ if (opt & 0x4) append_mount_options(&cmdopts, "ro"); // -r
+ if (opt & 0x8) append_mount_options(&cmdopts, "rw"); // -w
+ //if (opt & 0x10) // -a
+ if (opt & 0x20) USE_FEATURE_MTAB_SUPPORT(useMtab = 0); // -n
+ if (opt & 0x40) USE_FEATURE_MTAB_SUPPORT(fakeIt = 1); // -f
+ //if (opt & 0x80) // -v: verbose (ignore)
+ //if (opt & 0x100) // -s: sloppy (ignore)
+ argv += optind;
+ argc -= optind;
+
+ // Three or more non-option arguments? Die with a usage message.
+
+ if (argc > 2) bb_show_usage();
+
+ // If we have no arguments, show currently mounted filesystems
+
+ if (!argc) {
+ if (!(opt & OPT_ALL)) {
+ FILE *mountTable = setmntent(bb_path_mtab_file, "r");
+
+ if (!mountTable) bb_error_msg_and_die("no %s",bb_path_mtab_file);
+
+ while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
+ sizeof(bb_common_bufsiz1)))
{
- // Skip funky entries in /proc
- if(!strncmp(buf,"nodev",5) && isspace(buf[5])) continue;
-
- while(isspace(*fsType)) fsType++;
- if(*buf=='#' || *buf=='*') continue;
- if(!*fsType) continue;
-mount_it_now:
- // Okay, try to mount
-
- if (!fakeIt) {
- for(;;) {
- rc = mount(blockDevice, directory, fsType, flags, string_flags);
- if(!rc || (flags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
- break;
- bb_error_msg("%s is write-protected, mounting read-only", blockDevice);
- flags|=MS_RDONLY;
- }
- }
- if(!rc || !f) break;
+ // Don't show rootfs.
+ if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
+
+ if (!fstype || !strcmp(mtpair->mnt_type, fstype))
+ printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
+ mtpair->mnt_dir, mtpair->mnt_type,
+ mtpair->mnt_opts);
}
- if(f) fclose(f);
- if(!f || !rc) break;
+ if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
+ return EXIT_SUCCESS;
}
+ } else storage_path = bb_simplify_path(argv[0]);
- /* If the mount was sucessful, and we're maintaining an old-style
- * mtab file by hand, add new entry to it now. */
- if((!rc || fakeIt) && useMtab) {
- FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
+ // When we have two arguments, the second is the directory and we can
+ // skip looking at fstab entirely. We can always abspath() the directory
+ // argument when we get it.
- if(!mountTable) bb_perror_msg(bb_path_mtab_file);
- else {
- // Remove trailing / (if any) from directory we mounted on
- int length=strlen(directory);
- if(length>1 && directory[length-1] == '/')
- directory[length-1]=0;
-
- // Fill out structure (should be ok to re-use existing one).
- m.mnt_fsname=blockDevice;
- m.mnt_dir=directory;
- m.mnt_type=fsType ? : "--bind";
- m.mnt_opts=string_flags ? :
- ((flags & MS_RDONLY) ? "ro" : "rw");
- m.mnt_freq = 0;
- m.mnt_passno = 0;
-
- // Write and close
- addmntent(mountTable, &m);
- endmntent(mountTable);
+ if (argc == 2) {
+ mtpair->mnt_fsname = argv[0];
+ mtpair->mnt_dir = argv[1];
+ mtpair->mnt_type = fstype;
+ mtpair->mnt_opts = cmdopts;
+ rc = singlemount(mtpair, 0);
+ goto clean_up;
+ }
+
+ i = parse_mount_options(cmdopts, 0);
+
+ // If we have a shared subtree flag, don't worry about fstab or mtab.
+
+ if (ENABLE_FEATURE_MOUNT_FLAGS &&
+ (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE )))
+ {
+ rc = mount("", argv[0], "", i, "");
+ if (rc) bb_perror_msg_and_die("%s", argv[0]);
+ goto clean_up;
+ }
+
+ // Open either fstab or mtab
+
+ if (i & MS_REMOUNT)
+ fstabname = bb_path_mtab_file;
+ else fstabname = "/etc/fstab";
+ fstab = setmntent(fstabname,"r");
+ if (!fstab)
+ bb_perror_msg_and_die("cannot read %s", fstabname);
+
+ // Loop through entries until we find what we're looking for.
+
+ memset(mtpair, 0, sizeof(mtpair));
+ for (;;) {
+ struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
+
+ // Get next fstab entry
+
+ if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
+ + (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
+ sizeof(bb_common_bufsiz1)/2))
+ {
+ // Were we looking for something specific?
+
+ if (argc) {
+
+ // If we didn't find anything, complain.
+
+ if (!mtnext->mnt_fsname)
+ bb_error_msg_and_die("can't find %s in %s",
+ argv[0], fstabname);
+
+ // Mount the last thing we found.
+
+ mtcur = mtnext;
+ mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
+ append_mount_options(&(mtcur->mnt_opts),cmdopts);
+ rc = singlemount(mtcur, 0);
+ free(mtcur->mnt_opts);
}
+ goto clean_up;
+ }
+
+ /* If we're trying to mount something specific and this isn't it,
+ * skip it. Note we must match both the exact text in fstab (ala
+ * "proc") or a full path from root */
+
+ if (argc) {
+
+ // Is this what we're looking for?
+
+ if (strcmp(argv[0],mtcur->mnt_fsname) &&
+ strcmp(storage_path,mtcur->mnt_fsname) &&
+ strcmp(argv[0],mtcur->mnt_dir) &&
+ strcmp(storage_path,mtcur->mnt_dir)) continue;
+
+ // Remember this entry. Something later may have overmounted
+ // it, and we want the _last_ match.
+
+ mtcur = mtnext;
+
+ // If we're mounting all.
+
} else {
- // Mount failed. Clean up
- if(loopFile) {
- del_loop(blockDevice);
- if(ENABLE_FEATURE_CLEAN_UP) free(loopFile);
+
+ // Do we need to match a filesystem type?
+ if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
+
+ // Skip noauto and swap anyway.
+
+ if (parse_mount_options(mtcur->mnt_opts,0)
+ & (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
+
+ // Mount this thing.
+
+ if (singlemount(mtcur, 1)) {
+ /* Count number of failed mounts */
+ rc++;
}
- // Don't whine about already mounted fs when mounting all.
- if(rc<0 && errno == EBUSY && all) rc = 0;
- else if (errno == EPERM)
- bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- }
- // We couldn't free this earlier becase fsType could be in buf.
- if(ENABLE_FEATURE_CLEAN_UP) {
- free(buf);
- free(blockDevice);
- free(directory);
}
- if(!all) break;
}
+ if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
- if(file) endmntent(file);
- if(rc) bb_perror_msg("Mounting %s on %s failed", blockDevice, directory);
+clean_up:
+
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(storage_path);
+ free(cmdopts);
+ }
return rc;
}
projects / oweals / busybox.git / blobdiff