2036 lines
50 KiB
C
2036 lines
50 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini mount implementation for busybox
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*
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* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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// Design notes: There is no spec for mount. Remind me to write one.
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//
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// mount_main() calls singlemount() which calls mount_it_now().
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//
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// mount_main() can loop through /etc/fstab for mount -a
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// singlemount() can loop through /etc/filesystems for fstype detection.
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// mount_it_now() does the actual mount.
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//
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#include <mntent.h>
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#include <syslog.h>
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#include <sys/mount.h>
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// Grab more as needed from util-linux's mount/mount_constants.h
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#ifndef MS_DIRSYNC
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# define MS_DIRSYNC (1 << 7) // Directory modifications are synchronous
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#endif
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#ifndef MS_UNION
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# define MS_UNION (1 << 8)
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#endif
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#ifndef MS_BIND
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# define MS_BIND (1 << 12)
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#endif
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#ifndef MS_MOVE
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# define MS_MOVE (1 << 13)
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#endif
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#ifndef MS_RECURSIVE
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# define MS_RECURSIVE (1 << 14)
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#endif
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#ifndef MS_SILENT
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# define MS_SILENT (1 << 15)
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#endif
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// The shared subtree stuff, which went in around 2.6.15
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#ifndef MS_UNBINDABLE
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# define MS_UNBINDABLE (1 << 17)
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#endif
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#ifndef MS_PRIVATE
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# define MS_PRIVATE (1 << 18)
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#endif
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#ifndef MS_SLAVE
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# define MS_SLAVE (1 << 19)
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#endif
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#ifndef MS_SHARED
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# define MS_SHARED (1 << 20)
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#endif
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#ifndef MS_RELATIME
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# define MS_RELATIME (1 << 21)
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#endif
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#include "libbb.h"
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#if ENABLE_FEATURE_MOUNT_LABEL
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# include "volume_id.h"
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#else
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# define resolve_mount_spec(fsname) ((void)0)
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#endif
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// Needed for nfs support only
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#include <sys/utsname.h>
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#undef TRUE
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#undef FALSE
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/pmap_clnt.h>
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#if defined(__dietlibc__)
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// 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
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// dietlibc-0.30 does not have implementation of getmntent_r()
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static struct mntent *getmntent_r(FILE* stream, struct mntent* result,
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char* buffer UNUSED_PARAM, int bufsize UNUSED_PARAM)
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{
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struct mntent* ment = getmntent(stream);
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return memcpy(result, ment, sizeof(*ment));
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}
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#endif
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// Not real flags, but we want to be able to check for this.
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enum {
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MOUNT_USERS = (1 << 28) * ENABLE_DESKTOP,
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MOUNT_NOAUTO = (1 << 29),
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MOUNT_SWAP = (1 << 30),
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};
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#define OPTION_STR "o:t:rwanfvsiO:"
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enum {
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OPT_o = (1 << 0),
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OPT_t = (1 << 1),
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OPT_r = (1 << 2),
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OPT_w = (1 << 3),
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OPT_a = (1 << 4),
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OPT_n = (1 << 5),
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OPT_f = (1 << 6),
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OPT_v = (1 << 7),
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OPT_s = (1 << 8),
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OPT_i = (1 << 9),
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OPT_O = (1 << 10),
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};
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#if ENABLE_FEATURE_MTAB_SUPPORT
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#define USE_MTAB (!(option_mask32 & OPT_n))
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#else
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#define USE_MTAB 0
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#endif
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#if ENABLE_FEATURE_MOUNT_FAKE
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#define FAKE_IT (option_mask32 & OPT_f)
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#else
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#define FAKE_IT 0
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#endif
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#if ENABLE_FEATURE_MOUNT_HELPERS
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#define HELPERS_ALLOWED (!(option_mask32 & OPT_i))
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#else
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#define HELPERS_ALLOWED 0
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#endif
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// TODO: more "user" flag compatibility.
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// "user" option (from mount manpage):
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// Only the user that mounted a filesystem can unmount it again.
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// If any user should be able to unmount, then use users instead of user
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// in the fstab line. The owner option is similar to the user option,
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// with the restriction that the user must be the owner of the special file.
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// This may be useful e.g. for /dev/fd if a login script makes
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// the console user owner of this device.
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// Standard mount options (from -o options or --options),
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// with corresponding flags
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static const int32_t mount_options[] = {
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// MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
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IF_FEATURE_MOUNT_LOOP(
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/* "loop" */ 0,
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)
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IF_FEATURE_MOUNT_FSTAB(
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/* "defaults" */ 0,
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/* "quiet" 0 - do not filter out, vfat wants to see it */
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/* "noauto" */ MOUNT_NOAUTO,
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/* "sw" */ MOUNT_SWAP,
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/* "swap" */ MOUNT_SWAP,
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IF_DESKTOP(/* "user" */ MOUNT_USERS,)
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IF_DESKTOP(/* "users" */ MOUNT_USERS,)
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/* "_netdev" */ 0,
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)
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IF_FEATURE_MOUNT_FLAGS(
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// vfs flags
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/* "nosuid" */ MS_NOSUID,
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/* "suid" */ ~MS_NOSUID,
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/* "dev" */ ~MS_NODEV,
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/* "nodev" */ MS_NODEV,
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/* "exec" */ ~MS_NOEXEC,
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/* "noexec" */ MS_NOEXEC,
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/* "sync" */ MS_SYNCHRONOUS,
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/* "dirsync" */ MS_DIRSYNC,
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/* "async" */ ~MS_SYNCHRONOUS,
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/* "atime" */ ~MS_NOATIME,
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/* "noatime" */ MS_NOATIME,
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/* "diratime" */ ~MS_NODIRATIME,
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/* "nodiratime" */ MS_NODIRATIME,
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/* "mand" */ MS_MANDLOCK,
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/* "nomand" */ ~MS_MANDLOCK,
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/* "relatime" */ MS_RELATIME,
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/* "norelatime" */ ~MS_RELATIME,
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/* "loud" */ ~MS_SILENT,
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// action flags
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/* "union" */ MS_UNION,
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/* "bind" */ MS_BIND,
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/* "move" */ MS_MOVE,
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/* "shared" */ MS_SHARED,
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/* "slave" */ MS_SLAVE,
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/* "private" */ MS_PRIVATE,
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/* "unbindable" */ MS_UNBINDABLE,
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/* "rshared" */ MS_SHARED|MS_RECURSIVE,
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/* "rslave" */ MS_SLAVE|MS_RECURSIVE,
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/* "rprivate" */ MS_SLAVE|MS_RECURSIVE,
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/* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
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)
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// Always understood.
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/* "ro" */ MS_RDONLY, // vfs flag
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/* "rw" */ ~MS_RDONLY, // vfs flag
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/* "remount" */ MS_REMOUNT // action flag
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};
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static const char mount_option_str[] =
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IF_FEATURE_MOUNT_LOOP(
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"loop\0"
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)
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IF_FEATURE_MOUNT_FSTAB(
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"defaults\0"
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// "quiet\0" - do not filter out, vfat wants to see it
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"noauto\0"
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"sw\0"
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"swap\0"
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IF_DESKTOP("user\0")
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IF_DESKTOP("users\0")
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"_netdev\0"
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)
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IF_FEATURE_MOUNT_FLAGS(
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// vfs flags
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"nosuid\0"
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"suid\0"
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"dev\0"
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"nodev\0"
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"exec\0"
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"noexec\0"
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"sync\0"
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"dirsync\0"
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"async\0"
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"atime\0"
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"noatime\0"
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"diratime\0"
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"nodiratime\0"
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"mand\0"
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"nomand\0"
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"relatime\0"
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"norelatime\0"
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"loud\0"
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// action flags
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"union\0"
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"bind\0"
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"move\0"
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"shared\0"
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"slave\0"
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"private\0"
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"unbindable\0"
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"rshared\0"
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"rslave\0"
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"rprivate\0"
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"runbindable\0"
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)
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// Always understood.
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"ro\0" // vfs flag
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"rw\0" // vfs flag
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"remount\0" // action flag
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;
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struct globals {
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#if ENABLE_FEATURE_MOUNT_NFS
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smalluint nfs_mount_version;
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#endif
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#if ENABLE_FEATURE_MOUNT_VERBOSE
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unsigned verbose;
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#endif
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llist_t *fslist;
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char getmntent_buf[1];
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};
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enum { GETMNTENT_BUFSIZE = COMMON_BUFSIZE - offsetof(struct globals, getmntent_buf) };
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define nfs_mount_version (G.nfs_mount_version)
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#if ENABLE_FEATURE_MOUNT_VERBOSE
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#define verbose (G.verbose )
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#else
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#define verbose 0
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#endif
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#define fslist (G.fslist )
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#define getmntent_buf (G.getmntent_buf )
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#if ENABLE_FEATURE_MOUNT_VERBOSE
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static int verbose_mount(const char *source, const char *target,
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const char *filesystemtype,
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unsigned long mountflags, const void *data)
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{
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int rc;
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errno = 0;
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rc = mount(source, target, filesystemtype, mountflags, data);
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if (verbose >= 2)
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bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d",
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source, target, filesystemtype,
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mountflags, (char*)data, rc);
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return rc;
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}
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#else
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#define verbose_mount(...) mount(__VA_ARGS__)
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#endif
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// Append mount options to string
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static void append_mount_options(char **oldopts, const char *newopts)
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{
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if (*oldopts && **oldopts) {
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// Do not insert options which are already there
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while (newopts[0]) {
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char *p;
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int len = strlen(newopts);
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p = strchr(newopts, ',');
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if (p) len = p - newopts;
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p = *oldopts;
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while (1) {
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if (!strncmp(p, newopts, len)
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&& (p[len] == ',' || p[len] == '\0'))
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goto skip;
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p = strchr(p,',');
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if (!p) break;
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p++;
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}
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p = xasprintf("%s,%.*s", *oldopts, len, newopts);
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free(*oldopts);
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*oldopts = p;
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skip:
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newopts += len;
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while (newopts[0] == ',') newopts++;
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}
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} else {
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if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
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*oldopts = xstrdup(newopts);
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}
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}
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// Use the mount_options list to parse options into flags.
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// Also return list of unrecognized options if unrecognized != NULL
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static long parse_mount_options(char *options, char **unrecognized)
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{
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long flags = MS_SILENT;
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// Loop through options
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for (;;) {
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unsigned i;
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char *comma = strchr(options, ',');
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const char *option_str = mount_option_str;
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if (comma) *comma = '\0';
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// FIXME: use hasmntopt()
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// Find this option in mount_options
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for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
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if (!strcasecmp(option_str, options)) {
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long fl = mount_options[i];
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if (fl < 0) flags &= fl;
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else flags |= fl;
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break;
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}
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option_str += strlen(option_str) + 1;
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}
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// If unrecognized not NULL, append unrecognized mount options
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if (unrecognized && i == ARRAY_SIZE(mount_options)) {
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// Add it to strflags, to pass on to kernel
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i = *unrecognized ? strlen(*unrecognized) : 0;
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*unrecognized = xrealloc(*unrecognized, i + strlen(options) + 2);
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// Comma separated if it's not the first one
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if (i) (*unrecognized)[i++] = ',';
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strcpy((*unrecognized)+i, options);
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}
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if (!comma)
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break;
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// Advance to next option
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*comma = ',';
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options = ++comma;
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}
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return flags;
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}
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// Return a list of all block device backed filesystems
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static llist_t *get_block_backed_filesystems(void)
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{
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static const char filesystems[2][sizeof("/proc/filesystems")] = {
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"/etc/filesystems",
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"/proc/filesystems",
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};
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char *fs, *buf;
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llist_t *list = NULL;
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int i;
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FILE *f;
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for (i = 0; i < 2; i++) {
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f = fopen_for_read(filesystems[i]);
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if (!f) continue;
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while ((buf = xmalloc_fgetline(f)) != NULL) {
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if (strncmp(buf, "nodev", 5) == 0 && isspace(buf[5]))
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continue;
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fs = skip_whitespace(buf);
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if (*fs == '#' || *fs == '*' || !*fs)
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continue;
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llist_add_to_end(&list, xstrdup(fs));
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free(buf);
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}
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if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
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}
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return list;
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}
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#if ENABLE_FEATURE_CLEAN_UP
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static void delete_block_backed_filesystems(void)
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{
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llist_free(fslist, free);
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}
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#else
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void delete_block_backed_filesystems(void);
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#endif
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// Perform actual mount of specific filesystem at specific location.
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// NB: mp->xxx fields may be trashed on exit
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static int mount_it_now(struct mntent *mp, long vfsflags, char *filteropts)
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{
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int rc = 0;
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|
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if (FAKE_IT) {
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if (verbose >= 2)
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bb_error_msg("would do mount('%s','%s','%s',0x%08lx,'%s')",
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mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
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vfsflags, filteropts);
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goto mtab;
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}
|
|
|
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// Mount, with fallback to read-only if necessary.
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for (;;) {
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errno = 0;
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rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
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vfsflags, filteropts);
|
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|
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// If mount failed, try
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// helper program mount.<mnt_type>
|
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if (HELPERS_ALLOWED && rc && mp->mnt_type) {
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char *args[8];
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int errno_save = errno;
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args[0] = xasprintf("mount.%s", mp->mnt_type);
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rc = 1;
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if (FAKE_IT)
|
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args[rc++] = (char *)"-f";
|
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if (ENABLE_FEATURE_MTAB_SUPPORT && !USE_MTAB)
|
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args[rc++] = (char *)"-n";
|
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args[rc++] = mp->mnt_fsname;
|
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args[rc++] = mp->mnt_dir;
|
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if (filteropts) {
|
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args[rc++] = (char *)"-o";
|
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args[rc++] = filteropts;
|
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}
|
|
args[rc] = NULL;
|
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rc = wait4pid(spawn(args));
|
|
free(args[0]);
|
|
if (!rc)
|
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break;
|
|
errno = errno_save;
|
|
}
|
|
|
|
if (!rc || (vfsflags & MS_RDONLY) || (errno != EACCES && errno != EROFS))
|
|
break;
|
|
if (!(vfsflags & MS_SILENT))
|
|
bb_error_msg("%s is write-protected, mounting read-only",
|
|
mp->mnt_fsname);
|
|
vfsflags |= MS_RDONLY;
|
|
}
|
|
|
|
// Abort entirely if permission denied.
|
|
|
|
if (rc && errno == EPERM)
|
|
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
|
|
|
// 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 (USE_MTAB && !rc && !(vfsflags & MS_REMOUNT)) {
|
|
char *fsname;
|
|
FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
|
|
const char *option_str = mount_option_str;
|
|
int i;
|
|
|
|
if (!mountTable) {
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bb_error_msg("no %s", bb_path_mtab_file);
|
|
goto ret;
|
|
}
|
|
|
|
// Add vfs string flags
|
|
|
|
for (i = 0; mount_options[i] != MS_REMOUNT; i++) {
|
|
if (mount_options[i] > 0 && (mount_options[i] & vfsflags))
|
|
append_mount_options(&(mp->mnt_opts), option_str);
|
|
option_str += strlen(option_str) + 1;
|
|
}
|
|
|
|
// Remove trailing / (if any) from directory we mounted on
|
|
|
|
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 = (char*)"bind";
|
|
}
|
|
mp->mnt_freq = mp->mnt_passno = 0;
|
|
|
|
// Write and close.
|
|
|
|
addmntent(mountTable, mp);
|
|
endmntent(mountTable);
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(mp->mnt_dir);
|
|
free(fsname);
|
|
}
|
|
}
|
|
ret:
|
|
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 Mickiewicz <misiek@misiek.eu.org>
|
|
* - added Native Language Support
|
|
*
|
|
* Modified by Olaf Kirch and Trond Myklebust for new NFS code,
|
|
* plus NFSv3 stuff.
|
|
*/
|
|
|
|
/* 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
|
|
|
|
#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;
|
|
uint8_t 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 */
|
|
NFS_MOUNT_NORDIRPLUS = 0x4000
|
|
};
|
|
|
|
|
|
/*
|
|
* 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 {
|
|
short stat;
|
|
short 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;
|
|
|
|
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
|
if (nfs_errtbl[i].stat == status)
|
|
return strerror(nfs_errtbl[i].errnum);
|
|
}
|
|
return xasprintf("unknown nfs status return value: %d", status);
|
|
}
|
|
|
|
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)
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
int kernel_version;
|
|
|
|
if (nfs_mount_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 void
|
|
get_mountport(struct pmap *pm_mnt,
|
|
struct sockaddr_in *server_addr,
|
|
long unsigned prog,
|
|
long unsigned version,
|
|
long unsigned proto,
|
|
long unsigned port)
|
|
{
|
|
struct pmaplist *pmap;
|
|
|
|
server_addr->sin_port = PMAPPORT;
|
|
/* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
|
|
* I understand it like "IPv6 for this is not 100% ready" */
|
|
pmap = pmap_getmaps(server_addr);
|
|
|
|
if (version > MAX_NFSPROT)
|
|
version = MAX_NFSPROT;
|
|
if (!prog)
|
|
prog = MOUNTPROG;
|
|
pm_mnt->pm_prog = prog;
|
|
pm_mnt->pm_vers = version;
|
|
pm_mnt->pm_prot = proto;
|
|
pm_mnt->pm_port = port;
|
|
|
|
while (pmap) {
|
|
if (pmap->pml_map.pm_prog != prog)
|
|
goto next;
|
|
if (!version && pm_mnt->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 && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto) ||
|
|
(port && pmap->pml_map.pm_port != port))
|
|
goto next;
|
|
memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt));
|
|
next:
|
|
pmap = pmap->pml_next;
|
|
}
|
|
if (!pm_mnt->pm_vers)
|
|
pm_mnt->pm_vers = MOUNTVERS;
|
|
if (!pm_mnt->pm_port)
|
|
pm_mnt->pm_port = MOUNTPORT;
|
|
if (!pm_mnt->pm_prot)
|
|
pm_mnt->pm_prot = IPPROTO_TCP;
|
|
}
|
|
|
|
#if BB_MMU
|
|
static int daemonize(void)
|
|
{
|
|
int pid = fork();
|
|
if (pid < 0) /* error */
|
|
return -errno;
|
|
if (pid > 0) /* parent */
|
|
return 0;
|
|
/* child */
|
|
close(0);
|
|
xopen(bb_dev_null, O_RDWR);
|
|
xdup2(0, 1);
|
|
xdup2(0, 2);
|
|
setsid();
|
|
openlog(applet_name, LOG_PID, LOG_DAEMON);
|
|
logmode = LOGMODE_SYSLOG;
|
|
return 1;
|
|
}
|
|
#else
|
|
static inline int daemonize(void) { return -ENOSYS; }
|
|
#endif
|
|
|
|
/* TODO */
|
|
static inline int we_saw_this_host_before(const char *hostname UNUSED_PARAM)
|
|
{
|
|
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 NOINLINE int nfsmount(struct mntent *mp, long vfsflags, char *filteropts)
|
|
{
|
|
CLIENT *mclient;
|
|
char *hostname;
|
|
char *pathname;
|
|
char *mounthost;
|
|
/* prior to 2.6.23, kernel took NFS options in a form of this struct
|
|
* only. 2.6.23+ looks at data->version, and if it's not 1..6,
|
|
* then data pointer is interpreted as a string. */
|
|
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;
|
|
#if BB_MMU
|
|
smallint bg = 0;
|
|
#else
|
|
enum { bg = 0 };
|
|
#endif
|
|
int retry;
|
|
int mountprog;
|
|
int mountvers;
|
|
int nfsprog;
|
|
int nfsvers;
|
|
int retval;
|
|
/* these all are one-bit really. gcc 4.3.1 likes this combination: */
|
|
smallint tcp;
|
|
smallint soft;
|
|
int intr;
|
|
int posix;
|
|
int nocto;
|
|
int noac;
|
|
int nordirplus;
|
|
int nolock;
|
|
|
|
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 ((size_t)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;
|
|
|
|
soft = 0;
|
|
intr = 0;
|
|
posix = 0;
|
|
nocto = 0;
|
|
nolock = 0;
|
|
noac = 0;
|
|
nordirplus = 0;
|
|
retry = 10000; /* 10000 minutes ~ 1 week */
|
|
tcp = 0;
|
|
|
|
mountprog = MOUNTPROG;
|
|
mountvers = 0;
|
|
port = 0;
|
|
mountport = 0;
|
|
nfsprog = 100003;
|
|
nfsvers = 0;
|
|
|
|
/* parse options */
|
|
if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
|
|
char *opteq = strchr(opt, '=');
|
|
if (opteq) {
|
|
int val, idx;
|
|
static const char options[] ALIGN1 =
|
|
/* 0 */ "rsize\0"
|
|
/* 1 */ "wsize\0"
|
|
/* 2 */ "timeo\0"
|
|
/* 3 */ "retrans\0"
|
|
/* 4 */ "acregmin\0"
|
|
/* 5 */ "acregmax\0"
|
|
/* 6 */ "acdirmin\0"
|
|
/* 7 */ "acdirmax\0"
|
|
/* 8 */ "actimeo\0"
|
|
/* 9 */ "retry\0"
|
|
/* 10 */ "port\0"
|
|
/* 11 */ "mountport\0"
|
|
/* 12 */ "mounthost\0"
|
|
/* 13 */ "mountprog\0"
|
|
/* 14 */ "mountvers\0"
|
|
/* 15 */ "nfsprog\0"
|
|
/* 16 */ "nfsvers\0"
|
|
/* 17 */ "vers\0"
|
|
/* 18 */ "proto\0"
|
|
/* 19 */ "namlen\0"
|
|
/* 20 */ "addr\0";
|
|
|
|
*opteq++ = '\0';
|
|
idx = index_in_strings(options, opt);
|
|
switch (idx) {
|
|
case 12: // "mounthost"
|
|
mounthost = xstrndup(opteq,
|
|
strcspn(opteq, " \t\n\r,"));
|
|
continue;
|
|
case 18: // "proto"
|
|
if (!strncmp(opteq, "tcp", 3))
|
|
tcp = 1;
|
|
else if (!strncmp(opteq, "udp", 3))
|
|
tcp = 0;
|
|
else
|
|
bb_error_msg("warning: unrecognized proto= option");
|
|
continue;
|
|
case 20: // "addr" - ignore
|
|
continue;
|
|
}
|
|
|
|
val = xatoi_u(opteq);
|
|
switch (idx) {
|
|
case 0: // "rsize"
|
|
data.rsize = val;
|
|
continue;
|
|
case 1: // "wsize"
|
|
data.wsize = val;
|
|
continue;
|
|
case 2: // "timeo"
|
|
data.timeo = val;
|
|
continue;
|
|
case 3: // "retrans"
|
|
data.retrans = val;
|
|
continue;
|
|
case 4: // "acregmin"
|
|
data.acregmin = val;
|
|
continue;
|
|
case 5: // "acregmax"
|
|
data.acregmax = val;
|
|
continue;
|
|
case 6: // "acdirmin"
|
|
data.acdirmin = val;
|
|
continue;
|
|
case 7: // "acdirmax"
|
|
data.acdirmax = val;
|
|
continue;
|
|
case 8: // "actimeo"
|
|
data.acregmin = val;
|
|
data.acregmax = val;
|
|
data.acdirmin = val;
|
|
data.acdirmax = val;
|
|
continue;
|
|
case 9: // "retry"
|
|
retry = val;
|
|
continue;
|
|
case 10: // "port"
|
|
port = val;
|
|
continue;
|
|
case 11: // "mountport"
|
|
mountport = val;
|
|
continue;
|
|
case 13: // "mountprog"
|
|
mountprog = val;
|
|
continue;
|
|
case 14: // "mountvers"
|
|
mountvers = val;
|
|
continue;
|
|
case 15: // "nfsprog"
|
|
nfsprog = val;
|
|
continue;
|
|
case 16: // "nfsvers"
|
|
case 17: // "vers"
|
|
nfsvers = val;
|
|
continue;
|
|
case 19: // "namlen"
|
|
//if (nfs_mount_version >= 2)
|
|
data.namlen = val;
|
|
//else
|
|
// bb_error_msg("warning: option namlen is not supported\n");
|
|
continue;
|
|
default:
|
|
bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
|
|
goto fail;
|
|
}
|
|
}
|
|
else { /* not of the form opt=val */
|
|
static const char options[] ALIGN1 =
|
|
"bg\0"
|
|
"fg\0"
|
|
"soft\0"
|
|
"hard\0"
|
|
"intr\0"
|
|
"posix\0"
|
|
"cto\0"
|
|
"ac\0"
|
|
"tcp\0"
|
|
"udp\0"
|
|
"lock\0"
|
|
"rdirplus\0";
|
|
int val = 1;
|
|
if (!strncmp(opt, "no", 2)) {
|
|
val = 0;
|
|
opt += 2;
|
|
}
|
|
switch (index_in_strings(options, opt)) {
|
|
case 0: // "bg"
|
|
#if BB_MMU
|
|
bg = val;
|
|
#endif
|
|
break;
|
|
case 1: // "fg"
|
|
#if BB_MMU
|
|
bg = !val;
|
|
#endif
|
|
break;
|
|
case 2: // "soft"
|
|
soft = val;
|
|
break;
|
|
case 3: // "hard"
|
|
soft = !val;
|
|
break;
|
|
case 4: // "intr"
|
|
intr = val;
|
|
break;
|
|
case 5: // "posix"
|
|
posix = val;
|
|
break;
|
|
case 6: // "cto"
|
|
nocto = !val;
|
|
break;
|
|
case 7: // "ac"
|
|
noac = !val;
|
|
break;
|
|
case 8: // "tcp"
|
|
tcp = val;
|
|
break;
|
|
case 9: // "udp"
|
|
tcp = !val;
|
|
break;
|
|
case 10: // "lock"
|
|
if (nfs_mount_version >= 3)
|
|
nolock = !val;
|
|
else
|
|
bb_error_msg("warning: option nolock is not supported");
|
|
break;
|
|
case 11: //rdirplus
|
|
nordirplus = !val;
|
|
break;
|
|
default:
|
|
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)
|
|
| (nordirplus ? NFS_MOUNT_NORDIRPLUS : 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();
|
|
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;
|
|
}
|
|
if ((size_t)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;
|
|
/* FIXME: use monotonic()? */
|
|
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);
|
|
|
|
get_mountport(&pm_mnt, &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 = NULL;
|
|
}
|
|
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 = NULL;
|
|
close(msock);
|
|
msock = -1;
|
|
}
|
|
|
|
/* 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);
|
|
msock = -1;
|
|
|
|
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 */
|
|
/* FIXME: parent doesn't close fsock - ??! */
|
|
retval = -daemonized;
|
|
goto ret;
|
|
}
|
|
}
|
|
sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
|
|
delay *= 2;
|
|
if (delay > 30)
|
|
delay = 30;
|
|
}
|
|
}
|
|
|
|
/* Perform actual mount */
|
|
do_mount:
|
|
mp->mnt_type = (char*)"nfs";
|
|
retval = mount_it_now(mp, vfsflags, (char*)&data);
|
|
goto ret;
|
|
|
|
/* Abort */
|
|
fail:
|
|
if (msock >= 0) {
|
|
if (mclient) {
|
|
auth_destroy(mclient->cl_auth);
|
|
clnt_destroy(mclient);
|
|
}
|
|
close(msock);
|
|
}
|
|
if (fsock >= 0)
|
|
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, long 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;
|
|
long vfsflags;
|
|
char *loopFile = NULL, *filteropts = NULL;
|
|
llist_t *fl = NULL;
|
|
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") == 0)
|
|
mp->mnt_type = NULL;
|
|
|
|
// Might this be a virtual filesystem?
|
|
if (ENABLE_FEATURE_MOUNT_HELPERS && strchr(mp->mnt_fsname, '#')) {
|
|
char *args[35];
|
|
char *s;
|
|
int n;
|
|
// fsname: "cmd#arg1#arg2..."
|
|
// WARNING: allows execution of arbitrary commands!
|
|
// Try "mount 'sh#-c#sh' bogus_dir".
|
|
// It is safe ONLY because non-root
|
|
// cannot use two-argument mount command
|
|
// and using one-argument "mount 'sh#-c#sh'" doesn't work:
|
|
// "mount: can't find sh#-c#sh in /etc/fstab"
|
|
// (if /etc/fstab has it, it's ok: root sets up /etc/fstab).
|
|
|
|
s = mp->mnt_fsname;
|
|
n = 0;
|
|
args[n++] = s;
|
|
while (*s && n < 35 - 2) {
|
|
if (*s++ == '#' && *s != '#') {
|
|
s[-1] = '\0';
|
|
args[n++] = s;
|
|
}
|
|
}
|
|
args[n++] = mp->mnt_dir;
|
|
args[n] = NULL;
|
|
rc = wait4pid(xspawn(args));
|
|
goto report_error;
|
|
}
|
|
|
|
// Might this be an CIFS filesystem?
|
|
if (ENABLE_FEATURE_MOUNT_CIFS
|
|
&& (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0)
|
|
&& (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\')
|
|
&& mp->mnt_fsname[0] == mp->mnt_fsname[1]
|
|
) {
|
|
#if 0 /* reported to break things */
|
|
len_and_sockaddr *lsa;
|
|
char *ip, *dotted;
|
|
char *s;
|
|
|
|
// 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';
|
|
lsa = host2sockaddr(mp->mnt_fsname+2, 0);
|
|
*s = '\\';
|
|
if (!lsa)
|
|
goto report_error;
|
|
|
|
// Insert ip=... option into string flags.
|
|
dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
|
|
ip = xasprintf("ip=%s", dotted);
|
|
parse_mount_options(ip, &filteropts);
|
|
|
|
// Compose new unc '\\server-ip\share'
|
|
// (s => slash after hostname)
|
|
mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s);
|
|
#endif
|
|
// Lock is required [why?]
|
|
vfsflags |= MS_MANDLOCK;
|
|
mp->mnt_type = (char*)"cifs";
|
|
rc = mount_it_now(mp, vfsflags, filteropts);
|
|
#if 0
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(mp->mnt_fsname);
|
|
free(ip);
|
|
free(dotted);
|
|
free(lsa);
|
|
}
|
|
#endif
|
|
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.)
|
|
// (We use stat, not lstat, in order to allow
|
|
// mount symlink_to_file_or_blkdev dir)
|
|
if (!stat(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 = NULL; // will receive malloced loop dev name
|
|
if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) {
|
|
if (errno == EPERM || errno == EACCES)
|
|
bb_error_msg(bb_msg_perm_denied_are_you_root);
|
|
else
|
|
bb_perror_msg("can't 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);
|
|
else {
|
|
// Loop through filesystem types until mount succeeds
|
|
// or we run out
|
|
|
|
// 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 (errno == EBUSY && ignore_busy)
|
|
return 0;
|
|
if (rc < 0)
|
|
bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
|
|
return rc;
|
|
}
|
|
|
|
/* -O support
|
|
* Unlike -t, -O should interpret "no" prefix differently:
|
|
* -t noa,b,c = -t no(a,b,c) = mount all except fs'es with types a,b, and c
|
|
* -O noa,b,c = -O noa,b,c = mount all with without option a,
|
|
* or with option b or c.
|
|
* But for now we do not support -O a,b,c at all (only -O a).
|
|
*
|
|
* Another difference from -t support (match_fstype) is that
|
|
* we need to examine the _list_ of options in fsopt, not just a string.
|
|
*/
|
|
static int match_opt(const char *fs_opt, const char *O_opt)
|
|
{
|
|
int match = 1;
|
|
int len;
|
|
|
|
if (!O_opt)
|
|
return match;
|
|
|
|
if (O_opt[0] == 'n' && O_opt[1] == 'o') {
|
|
match--;
|
|
O_opt += 2;
|
|
}
|
|
|
|
len = strlen(O_opt);
|
|
while (1) {
|
|
if (strncmp(fs_opt, O_opt, len) == 0
|
|
&& (fs_opt[len] == '\0' || fs_opt[len] == ',')
|
|
) {
|
|
return match;
|
|
}
|
|
fs_opt = strchr(fs_opt, ',');
|
|
if (!fs_opt)
|
|
break;
|
|
fs_opt++;
|
|
}
|
|
|
|
return !match;
|
|
}
|
|
|
|
// Parse options, if necessary parse fstab/mtab, and call singlemount for
|
|
// each directory to be mounted.
|
|
static const char must_be_root[] ALIGN1 = "you must be root";
|
|
|
|
int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int mount_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
char *cmdopts = xzalloc(1);
|
|
char *fstype = NULL;
|
|
char *O_optmatch = NULL;
|
|
char *storage_path;
|
|
llist_t *lst_o = NULL;
|
|
const char *fstabname;
|
|
FILE *fstab;
|
|
int i, j, rc = 0;
|
|
unsigned opt;
|
|
struct mntent mtpair[2], *mtcur = mtpair;
|
|
IF_NOT_DESKTOP(const int nonroot = 0;)
|
|
|
|
IF_DESKTOP(int nonroot = ) sanitize_env_if_suid();
|
|
|
|
// Parse long options, like --bind and --move. Note that -o option
|
|
// and --option are synonymous. Yes, this means --remount,rw works.
|
|
for (i = j = 1; argv[i]; i++) {
|
|
if (argv[i][0] == '-' && argv[i][1] == '-')
|
|
append_mount_options(&cmdopts, argv[i] + 2);
|
|
else
|
|
argv[j++] = argv[i];
|
|
}
|
|
argv[j] = NULL;
|
|
|
|
// Parse remaining options
|
|
// Max 2 params; -o is a list, -v is a counter
|
|
opt_complementary = "?2o::" IF_FEATURE_MOUNT_VERBOSE("vv");
|
|
opt = getopt32(argv, OPTION_STR, &lst_o, &fstype, &O_optmatch
|
|
IF_FEATURE_MOUNT_VERBOSE(, &verbose));
|
|
while (lst_o) append_mount_options(&cmdopts, llist_pop(&lst_o)); // -o
|
|
if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r
|
|
if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w
|
|
argv += optind;
|
|
|
|
// If we have no arguments, show currently mounted filesystems
|
|
if (!argv[0]) {
|
|
if (!(opt & OPT_a)) {
|
|
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[0], getmntent_buf,
|
|
GETMNTENT_BUFSIZE))
|
|
{
|
|
// Don't show rootfs. FIXME: why??
|
|
// util-linux 2.12a happily shows 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 (ENABLE_FEATURE_CLEAN_UP)
|
|
endmntent(mountTable);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
storage_path = NULL;
|
|
} else {
|
|
// 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 (argv[1]) {
|
|
if (nonroot)
|
|
bb_error_msg_and_die(must_be_root);
|
|
mtpair->mnt_fsname = argv[0];
|
|
mtpair->mnt_dir = argv[1];
|
|
mtpair->mnt_type = fstype;
|
|
mtpair->mnt_opts = cmdopts;
|
|
resolve_mount_spec(&mtpair->mnt_fsname);
|
|
rc = singlemount(mtpair, 0);
|
|
return rc;
|
|
}
|
|
storage_path = bb_simplify_path(argv[0]); // malloced
|
|
}
|
|
|
|
// Past this point, we are handling either "mount -a [opts]"
|
|
// or "mount [opts] single_param"
|
|
|
|
i = parse_mount_options(cmdopts, NULL); // FIXME: should be "long", not "int"
|
|
if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags
|
|
bb_error_msg_and_die(must_be_root);
|
|
|
|
// 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))
|
|
) {
|
|
// verbose_mount(source, target, type, flags, data)
|
|
rc = verbose_mount("", argv[0], "", i, "");
|
|
if (rc)
|
|
bb_simple_perror_msg_and_die(argv[0]);
|
|
return rc;
|
|
}
|
|
|
|
// Open either fstab or mtab
|
|
fstabname = "/etc/fstab";
|
|
if (i & MS_REMOUNT) {
|
|
// WARNING. I am not sure this matches util-linux's
|
|
// behavior. It's possible util-linux does not
|
|
// take -o opts from mtab (takes only mount source).
|
|
fstabname = bb_path_mtab_file;
|
|
}
|
|
fstab = setmntent(fstabname, "r");
|
|
if (!fstab)
|
|
bb_perror_msg_and_die("can't read %s", fstabname);
|
|
|
|
// Loop through entries until we find what we're looking for
|
|
memset(mtpair, 0, sizeof(mtpair));
|
|
for (;;) {
|
|
struct mntent *mtother = (mtcur==mtpair ? mtpair+1 : mtpair);
|
|
|
|
// Get next fstab entry
|
|
if (!getmntent_r(fstab, mtcur, getmntent_buf
|
|
+ (mtcur==mtpair ? GETMNTENT_BUFSIZE/2 : 0),
|
|
GETMNTENT_BUFSIZE/2)
|
|
) { // End of fstab/mtab is reached
|
|
mtcur = mtother; // the thing we found last time
|
|
break;
|
|
}
|
|
|
|
// If we're trying to mount something specific and this isn't it,
|
|
// skip it. Note we must match the exact text in fstab (ala
|
|
// "proc") or a full path from root
|
|
if (argv[0]) {
|
|
|
|
// 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 = mtother;
|
|
|
|
// If we're mounting all
|
|
} else {
|
|
// No, mount -a won't mount anything,
|
|
// even user mounts, for mere humans
|
|
if (nonroot)
|
|
bb_error_msg_and_die(must_be_root);
|
|
|
|
// Does type match? (NULL matches always)
|
|
if (!match_fstype(mtcur, fstype))
|
|
continue;
|
|
|
|
// Skip noauto and swap anyway.
|
|
if ((parse_mount_options(mtcur->mnt_opts, NULL) & (MOUNT_NOAUTO | MOUNT_SWAP))
|
|
// swap is bogus "fstype", parse_mount_options can't check fstypes
|
|
|| strcasecmp(mtcur->mnt_type, "swap") == 0
|
|
) {
|
|
continue;
|
|
}
|
|
|
|
// Does (at least one) option match?
|
|
// (NULL matches always)
|
|
if (!match_opt(mtcur->mnt_opts, O_optmatch))
|
|
continue;
|
|
|
|
resolve_mount_spec(&mtcur->mnt_fsname);
|
|
|
|
// NFS mounts want this to be xrealloc-able
|
|
mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
|
|
|
// Mount this thing
|
|
if (singlemount(mtcur, 1)) {
|
|
// Count number of failed mounts
|
|
rc++;
|
|
}
|
|
free(mtcur->mnt_opts);
|
|
}
|
|
}
|
|
|
|
// End of fstab/mtab is reached.
|
|
// Were we looking for something specific?
|
|
if (argv[0]) {
|
|
long l;
|
|
|
|
// If we didn't find anything, complain
|
|
if (!mtcur->mnt_fsname)
|
|
bb_error_msg_and_die("can't find %s in %s",
|
|
argv[0], fstabname);
|
|
|
|
// What happens when we try to "mount swap_partition"?
|
|
// (fstab containts "swap_partition swap swap defaults 0 0")
|
|
// util-linux-ng 2.13.1 does this:
|
|
// stat("/sbin/mount.swap", 0x7fff62a3a350) = -1 ENOENT (No such file or directory)
|
|
// mount("swap_partition", "swap", "swap", MS_MGC_VAL, NULL) = -1 ENOENT (No such file or directory)
|
|
// lstat("swap", 0x7fff62a3a640) = -1 ENOENT (No such file or directory)
|
|
// write(2, "mount: mount point swap does not exist\n", 39) = 39
|
|
// exit_group(32) = ?
|
|
#if 0
|
|
// In case we want to simply skip swap partitions:
|
|
l = parse_mount_options(mtcur->mnt_opts, NULL);
|
|
if ((l & MOUNT_SWAP)
|
|
// swap is bogus "fstype", parse_mount_options can't check fstypes
|
|
|| strcasecmp(mtcur->mnt_type, "swap") == 0
|
|
) {
|
|
goto ret;
|
|
}
|
|
#endif
|
|
if (nonroot) {
|
|
// fstab must have "users" or "user"
|
|
l = parse_mount_options(mtcur->mnt_opts, NULL);
|
|
if (!(l & MOUNT_USERS))
|
|
bb_error_msg_and_die(must_be_root);
|
|
}
|
|
|
|
// Mount the last thing we found
|
|
mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
|
append_mount_options(&(mtcur->mnt_opts), cmdopts);
|
|
resolve_mount_spec(&mtpair->mnt_fsname);
|
|
rc = singlemount(mtcur, 0);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(mtcur->mnt_opts);
|
|
}
|
|
|
|
//ret:
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
endmntent(fstab);
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(storage_path);
|
|
free(cmdopts);
|
|
}
|
|
return rc;
|
|
}
|