[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini mount implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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| 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 7 | * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
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| 8 | *
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[2725] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 10 | */
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[2725] | 11 | // Design notes: There is no spec for mount. Remind me to write one.
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| 12 | //
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| 13 | // mount_main() calls singlemount() which calls mount_it_now().
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| 14 | //
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| 15 | // mount_main() can loop through /etc/fstab for mount -a
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| 16 | // singlemount() can loop through /etc/filesystems for fstype detection.
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| 17 | // mount_it_now() does the actual mount.
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| 18 | //
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[3232] | 19 |
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[3621] | 20 | //config:config MOUNT
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| 21 | //config: bool "mount"
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| 22 | //config: default y
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| 23 | //config: select PLATFORM_LINUX
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| 24 | //config: help
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| 25 | //config: All files and filesystems in Unix are arranged into one big directory
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| 26 | //config: tree. The 'mount' utility is used to graft a filesystem onto a
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| 27 | //config: particular part of the tree. A filesystem can either live on a block
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| 28 | //config: device, or it can be accessible over the network, as is the case with
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| 29 | //config: NFS filesystems. Most people using BusyBox will also want to enable
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| 30 | //config: the 'mount' utility.
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| 31 | //config:
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| 32 | //config:config FEATURE_MOUNT_FAKE
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| 33 | //config: bool "Support option -f"
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| 34 | //config: default y
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| 35 | //config: depends on MOUNT
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| 36 | //config: help
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| 37 | //config: Enable support for faking a file system mount.
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| 38 | //config:
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| 39 | //config:config FEATURE_MOUNT_VERBOSE
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| 40 | //config: bool "Support option -v"
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| 41 | //config: default y
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| 42 | //config: depends on MOUNT
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| 43 | //config: help
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| 44 | //config: Enable multi-level -v[vv...] verbose messages. Useful if you
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| 45 | //config: debug mount problems and want to see what is exactly passed
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| 46 | //config: to the kernel.
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| 47 | //config:
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| 48 | //config:config FEATURE_MOUNT_HELPERS
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| 49 | //config: bool "Support mount helpers"
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| 50 | //config: default n
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| 51 | //config: depends on MOUNT
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| 52 | //config: help
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| 53 | //config: Enable mounting of virtual file systems via external helpers.
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| 54 | //config: E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call
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| 55 | //config: "obexfs -b00.11.22.33.44.55 /mnt"
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| 56 | //config: Also "mount -t sometype [-o opts] fs /mnt" will try
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| 57 | //config: "sometype [-o opts] fs /mnt" if simple mount syscall fails.
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| 58 | //config: The idea is to use such virtual filesystems in /etc/fstab.
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| 59 | //config:
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| 60 | //config:config FEATURE_MOUNT_LABEL
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| 61 | //config: bool "Support specifying devices by label or UUID"
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| 62 | //config: default y
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| 63 | //config: depends on MOUNT
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| 64 | //config: select VOLUMEID
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| 65 | //config: help
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| 66 | //config: This allows for specifying a device by label or uuid, rather than by
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| 67 | //config: name. This feature utilizes the same functionality as blkid/findfs.
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| 68 | //config: This also enables label or uuid support for swapon.
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| 69 | //config:
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| 70 | //config:config FEATURE_MOUNT_NFS
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| 71 | //config: bool "Support mounting NFS file systems on Linux < 2.6.23"
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| 72 | //config: default n
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| 73 | //config: depends on MOUNT
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| 74 | //config: select FEATURE_HAVE_RPC
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| 75 | //config: select FEATURE_SYSLOG
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| 76 | //config: help
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| 77 | //config: Enable mounting of NFS file systems on Linux kernels prior
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| 78 | //config: to version 2.6.23. Note that in this case mounting of NFS
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| 79 | //config: over IPv6 will not be possible.
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| 80 | //config:
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| 81 | //config: Note that this option links in RPC support from libc,
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| 82 | //config: which is rather large (~10 kbytes on uclibc).
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| 83 | //config:
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| 84 | //config:config FEATURE_MOUNT_CIFS
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| 85 | //config: bool "Support mounting CIFS/SMB file systems"
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| 86 | //config: default y
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| 87 | //config: depends on MOUNT
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| 88 | //config: help
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| 89 | //config: Enable support for samba mounts.
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| 90 | //config:
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| 91 | //config:config FEATURE_MOUNT_FLAGS
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| 92 | //config: depends on MOUNT
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| 93 | //config: bool "Support lots of -o flags in mount"
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| 94 | //config: default y
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| 95 | //config: help
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| 96 | //config: Without this, mount only supports ro/rw/remount. With this, it
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| 97 | //config: supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
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| 98 | //config: noatime, diratime, nodiratime, loud, bind, move, shared, slave,
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| 99 | //config: private, unbindable, rshared, rslave, rprivate, and runbindable.
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| 100 | //config:
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| 101 | //config:config FEATURE_MOUNT_FSTAB
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| 102 | //config: depends on MOUNT
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| 103 | //config: bool "Support /etc/fstab and -a"
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| 104 | //config: default y
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| 105 | //config: help
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| 106 | //config: Support mount all and looking for files in /etc/fstab.
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| 107 | //config:
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| 108 | //config:config FEATURE_MOUNT_OTHERTAB
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| 109 | //config: depends on FEATURE_MOUNT_FSTAB
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| 110 | //config: bool "Support -T <alt_fstab>"
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| 111 | //config: default y
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| 112 | //config: help
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| 113 | //config: Support mount -T (specifying an alternate fstab)
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| 114 |
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[3232] | 115 | //usage:#define mount_trivial_usage
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[3621] | 116 | //usage: "[OPTIONS] [-o OPT] DEVICE NODE"
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[3232] | 117 | //usage:#define mount_full_usage "\n\n"
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| 118 | //usage: "Mount a filesystem. Filesystem autodetection requires /proc.\n"
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| 119 | //usage: "\n -a Mount all filesystems in fstab"
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| 120 | //usage: IF_FEATURE_MOUNT_FAKE(
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| 121 | //usage: IF_FEATURE_MTAB_SUPPORT(
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| 122 | //usage: "\n -f Update /etc/mtab, but don't mount"
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| 123 | //usage: )
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| 124 | //usage: IF_NOT_FEATURE_MTAB_SUPPORT(
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| 125 | //usage: "\n -f Dry run"
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| 126 | //usage: )
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| 127 | //usage: )
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| 128 | //usage: IF_FEATURE_MOUNT_HELPERS(
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| 129 | //usage: "\n -i Don't run mount helper"
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| 130 | //usage: )
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| 131 | //usage: IF_FEATURE_MTAB_SUPPORT(
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| 132 | //usage: "\n -n Don't update /etc/mtab"
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| 133 | //usage: )
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| 134 | //usage: IF_FEATURE_MOUNT_VERBOSE(
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| 135 | //usage: "\n -v Verbose"
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| 136 | //usage: )
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| 137 | ////usage: "\n -s Sloppy (ignored)"
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| 138 | //usage: "\n -r Read-only mount"
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[3621] | 139 | ////usage: "\n -w Read-write mount (default)"
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[3232] | 140 | //usage: "\n -t FSTYPE[,...] Filesystem type(s)"
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[3621] | 141 | //usage: IF_FEATURE_MOUNT_OTHERTAB(
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| 142 | //usage: "\n -T FILE Read FILE instead of /etc/fstab"
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| 143 | //usage: )
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[3232] | 144 | //usage: "\n -O OPT Mount only filesystems with option OPT (-a only)"
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| 145 | //usage: "\n-o OPT:"
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| 146 | //usage: IF_FEATURE_MOUNT_LOOP(
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| 147 | //usage: "\n loop Ignored (loop devices are autodetected)"
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| 148 | //usage: )
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| 149 | //usage: IF_FEATURE_MOUNT_FLAGS(
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| 150 | //usage: "\n [a]sync Writes are [a]synchronous"
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| 151 | //usage: "\n [no]atime Disable/enable updates to inode access times"
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| 152 | //usage: "\n [no]diratime Disable/enable atime updates to directories"
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| 153 | //usage: "\n [no]relatime Disable/enable atime updates relative to modification time"
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| 154 | //usage: "\n [no]dev (Dis)allow use of special device files"
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| 155 | //usage: "\n [no]exec (Dis)allow use of executable files"
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| 156 | //usage: "\n [no]suid (Dis)allow set-user-id-root programs"
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| 157 | //usage: "\n [r]shared Convert [recursively] to a shared subtree"
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| 158 | //usage: "\n [r]slave Convert [recursively] to a slave subtree"
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| 159 | //usage: "\n [r]private Convert [recursively] to a private subtree"
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| 160 | //usage: "\n [un]bindable Make mount point [un]able to be bind mounted"
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| 161 | //usage: "\n [r]bind Bind a file or directory [recursively] to another location"
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| 162 | //usage: "\n move Relocate an existing mount point"
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| 163 | //usage: )
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| 164 | //usage: "\n remount Remount a mounted filesystem, changing flags"
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[3621] | 165 | //usage: "\n ro Same as -r"
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[3232] | 166 | //usage: "\n"
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| 167 | //usage: "\nThere are filesystem-specific -o flags."
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| 168 | //usage:
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| 169 | //usage:#define mount_example_usage
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| 170 | //usage: "$ mount\n"
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| 171 | //usage: "/dev/hda3 on / type minix (rw)\n"
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| 172 | //usage: "proc on /proc type proc (rw)\n"
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| 173 | //usage: "devpts on /dev/pts type devpts (rw)\n"
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| 174 | //usage: "$ mount /dev/fd0 /mnt -t msdos -o ro\n"
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| 175 | //usage: "$ mount /tmp/diskimage /opt -t ext2 -o loop\n"
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| 176 | //usage: "$ mount cd_image.iso mydir\n"
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| 177 | //usage:#define mount_notes_usage
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| 178 | //usage: "Returns 0 for success, number of failed mounts for -a, or errno for one mount."
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| 179 |
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[2725] | 180 | #include <mntent.h>
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| 181 | #include <syslog.h>
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| 182 | #include <sys/mount.h>
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| 183 | // Grab more as needed from util-linux's mount/mount_constants.h
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| 184 | #ifndef MS_DIRSYNC
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| 185 | # define MS_DIRSYNC (1 << 7) // Directory modifications are synchronous
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| 186 | #endif
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| 187 | #ifndef MS_UNION
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| 188 | # define MS_UNION (1 << 8)
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| 189 | #endif
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| 190 | #ifndef MS_BIND
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| 191 | # define MS_BIND (1 << 12)
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| 192 | #endif
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| 193 | #ifndef MS_MOVE
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| 194 | # define MS_MOVE (1 << 13)
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| 195 | #endif
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| 196 | #ifndef MS_RECURSIVE
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| 197 | # define MS_RECURSIVE (1 << 14)
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| 198 | #endif
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| 199 | #ifndef MS_SILENT
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| 200 | # define MS_SILENT (1 << 15)
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| 201 | #endif
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| 202 | // The shared subtree stuff, which went in around 2.6.15
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| 203 | #ifndef MS_UNBINDABLE
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| 204 | # define MS_UNBINDABLE (1 << 17)
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| 205 | #endif
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| 206 | #ifndef MS_PRIVATE
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| 207 | # define MS_PRIVATE (1 << 18)
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| 208 | #endif
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| 209 | #ifndef MS_SLAVE
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| 210 | # define MS_SLAVE (1 << 19)
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| 211 | #endif
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| 212 | #ifndef MS_SHARED
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| 213 | # define MS_SHARED (1 << 20)
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| 214 | #endif
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| 215 | #ifndef MS_RELATIME
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| 216 | # define MS_RELATIME (1 << 21)
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| 217 | #endif
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[3232] | 218 | #ifndef MS_STRICTATIME
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| 219 | # define MS_STRICTATIME (1 << 24)
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| 220 | #endif
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[821] | 221 |
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[3232] | 222 | /* Any ~MS_FOO value has this bit set: */
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| 223 | #define BB_MS_INVERTED_VALUE (1u << 31)
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| 224 |
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[1765] | 225 | #include "libbb.h"
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[3621] | 226 | #include "common_bufsiz.h"
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[2725] | 227 | #if ENABLE_FEATURE_MOUNT_LABEL
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| 228 | # include "volume_id.h"
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| 229 | #else
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| 230 | # define resolve_mount_spec(fsname) ((void)0)
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| 231 | #endif
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[821] | 232 |
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[2725] | 233 | // Needed for nfs support only
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[1765] | 234 | #include <sys/utsname.h>
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| 235 | #undef TRUE
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| 236 | #undef FALSE
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[2725] | 237 | #if ENABLE_FEATURE_MOUNT_NFS
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| 238 | /* This is just a warning of a common mistake. Possibly this should be a
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| 239 | * uclibc faq entry rather than in busybox... */
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| 240 | # if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
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| 241 | # error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support"
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| 242 | # endif
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| 243 | # include <rpc/rpc.h>
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| 244 | # include <rpc/pmap_prot.h>
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| 245 | # include <rpc/pmap_clnt.h>
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| 246 | #endif
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[1765] | 247 |
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| 248 |
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| 249 | #if defined(__dietlibc__)
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[2725] | 250 | // 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
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| 251 | // dietlibc-0.30 does not have implementation of getmntent_r()
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| 252 | static struct mntent *getmntent_r(FILE* stream, struct mntent* result,
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| 253 | char* buffer UNUSED_PARAM, int bufsize UNUSED_PARAM)
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[1765] | 254 | {
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| 255 | struct mntent* ment = getmntent(stream);
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[2725] | 256 | return memcpy(result, ment, sizeof(*ment));
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[1765] | 257 | }
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[821] | 258 | #endif
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| 259 |
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[1765] | 260 |
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[821] | 261 | // Not real flags, but we want to be able to check for this.
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[1765] | 262 | enum {
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[3621] | 263 | MOUNT_USERS = (1 << 27) * ENABLE_DESKTOP,
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| 264 | MOUNT_NOFAIL = (1 << 28) * ENABLE_DESKTOP,
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[2725] | 265 | MOUNT_NOAUTO = (1 << 29),
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| 266 | MOUNT_SWAP = (1 << 30),
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[3621] | 267 | MOUNT_FAKEFLAGS = MOUNT_USERS | MOUNT_NOFAIL | MOUNT_NOAUTO | MOUNT_SWAP
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[1765] | 268 | };
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[2725] | 269 |
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| 270 |
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[3621] | 271 | #define OPTION_STR "o:t:rwanfvsiO:" IF_FEATURE_MOUNT_OTHERTAB("T:")
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[2725] | 272 | enum {
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| 273 | OPT_o = (1 << 0),
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| 274 | OPT_t = (1 << 1),
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| 275 | OPT_r = (1 << 2),
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| 276 | OPT_w = (1 << 3),
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| 277 | OPT_a = (1 << 4),
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| 278 | OPT_n = (1 << 5),
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| 279 | OPT_f = (1 << 6),
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| 280 | OPT_v = (1 << 7),
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| 281 | OPT_s = (1 << 8),
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| 282 | OPT_i = (1 << 9),
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| 283 | OPT_O = (1 << 10),
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[3621] | 284 | OPT_T = (1 << 11),
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[2725] | 285 | };
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| 286 |
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| 287 | #if ENABLE_FEATURE_MTAB_SUPPORT
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| 288 | #define USE_MTAB (!(option_mask32 & OPT_n))
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| 289 | #else
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| 290 | #define USE_MTAB 0
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| 291 | #endif
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| 292 |
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| 293 | #if ENABLE_FEATURE_MOUNT_FAKE
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| 294 | #define FAKE_IT (option_mask32 & OPT_f)
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| 295 | #else
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| 296 | #define FAKE_IT 0
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| 297 | #endif
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| 298 |
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| 299 | #if ENABLE_FEATURE_MOUNT_HELPERS
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| 300 | #define HELPERS_ALLOWED (!(option_mask32 & OPT_i))
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| 301 | #else
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| 302 | #define HELPERS_ALLOWED 0
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| 303 | #endif
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| 304 |
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| 305 |
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[1765] | 306 | // TODO: more "user" flag compatibility.
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| 307 | // "user" option (from mount manpage):
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| 308 | // Only the user that mounted a filesystem can unmount it again.
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| 309 | // If any user should be able to unmount, then use users instead of user
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| 310 | // in the fstab line. The owner option is similar to the user option,
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| 311 | // with the restriction that the user must be the owner of the special file.
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| 312 | // This may be useful e.g. for /dev/fd if a login script makes
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| 313 | // the console user owner of this device.
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| 314 |
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[2725] | 315 | // Standard mount options (from -o options or --options),
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| 316 | // with corresponding flags
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| 317 | static const int32_t mount_options[] = {
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[1765] | 318 | // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
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[821] | 319 |
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[2725] | 320 | IF_FEATURE_MOUNT_LOOP(
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| 321 | /* "loop" */ 0,
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[1765] | 322 | )
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[821] | 323 |
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[2725] | 324 | IF_FEATURE_MOUNT_FSTAB(
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| 325 | /* "defaults" */ 0,
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| 326 | /* "quiet" 0 - do not filter out, vfat wants to see it */
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| 327 | /* "noauto" */ MOUNT_NOAUTO,
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| 328 | /* "sw" */ MOUNT_SWAP,
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| 329 | /* "swap" */ MOUNT_SWAP,
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| 330 | IF_DESKTOP(/* "user" */ MOUNT_USERS,)
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| 331 | IF_DESKTOP(/* "users" */ MOUNT_USERS,)
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[3621] | 332 | IF_DESKTOP(/* "nofail" */ MOUNT_NOFAIL,)
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[2725] | 333 | /* "_netdev" */ 0,
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[3232] | 334 | IF_DESKTOP(/* "comment=" */ 0,) /* systemd uses this in fstab */
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[1765] | 335 | )
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[821] | 336 |
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[2725] | 337 | IF_FEATURE_MOUNT_FLAGS(
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[1765] | 338 | // vfs flags
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[2725] | 339 | /* "nosuid" */ MS_NOSUID,
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| 340 | /* "suid" */ ~MS_NOSUID,
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| 341 | /* "dev" */ ~MS_NODEV,
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| 342 | /* "nodev" */ MS_NODEV,
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| 343 | /* "exec" */ ~MS_NOEXEC,
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| 344 | /* "noexec" */ MS_NOEXEC,
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| 345 | /* "sync" */ MS_SYNCHRONOUS,
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| 346 | /* "dirsync" */ MS_DIRSYNC,
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| 347 | /* "async" */ ~MS_SYNCHRONOUS,
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| 348 | /* "atime" */ ~MS_NOATIME,
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| 349 | /* "noatime" */ MS_NOATIME,
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| 350 | /* "diratime" */ ~MS_NODIRATIME,
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| 351 | /* "nodiratime" */ MS_NODIRATIME,
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| 352 | /* "mand" */ MS_MANDLOCK,
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| 353 | /* "nomand" */ ~MS_MANDLOCK,
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| 354 | /* "relatime" */ MS_RELATIME,
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| 355 | /* "norelatime" */ ~MS_RELATIME,
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[3232] | 356 | /* "strictatime" */ MS_STRICTATIME,
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[2725] | 357 | /* "loud" */ ~MS_SILENT,
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[3232] | 358 | /* "rbind" */ MS_BIND|MS_RECURSIVE,
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[821] | 359 |
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[1765] | 360 | // action flags
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[2725] | 361 | /* "union" */ MS_UNION,
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| 362 | /* "bind" */ MS_BIND,
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| 363 | /* "move" */ MS_MOVE,
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| 364 | /* "shared" */ MS_SHARED,
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| 365 | /* "slave" */ MS_SLAVE,
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| 366 | /* "private" */ MS_PRIVATE,
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| 367 | /* "unbindable" */ MS_UNBINDABLE,
|
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| 368 | /* "rshared" */ MS_SHARED|MS_RECURSIVE,
|
---|
| 369 | /* "rslave" */ MS_SLAVE|MS_RECURSIVE,
|
---|
[3232] | 370 | /* "rprivate" */ MS_PRIVATE|MS_RECURSIVE,
|
---|
[2725] | 371 | /* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
|
---|
| 372 | )
|
---|
[821] | 373 |
|
---|
[2725] | 374 | // Always understood.
|
---|
| 375 | /* "ro" */ MS_RDONLY, // vfs flag
|
---|
| 376 | /* "rw" */ ~MS_RDONLY, // vfs flag
|
---|
| 377 | /* "remount" */ MS_REMOUNT // action flag
|
---|
| 378 | };
|
---|
| 379 |
|
---|
[3621] | 380 | static const char mount_option_str[] ALIGN1 =
|
---|
[2725] | 381 | IF_FEATURE_MOUNT_LOOP(
|
---|
| 382 | "loop\0"
|
---|
[1765] | 383 | )
|
---|
[2725] | 384 | IF_FEATURE_MOUNT_FSTAB(
|
---|
| 385 | "defaults\0"
|
---|
| 386 | // "quiet\0" - do not filter out, vfat wants to see it
|
---|
| 387 | "noauto\0"
|
---|
| 388 | "sw\0"
|
---|
| 389 | "swap\0"
|
---|
| 390 | IF_DESKTOP("user\0")
|
---|
| 391 | IF_DESKTOP("users\0")
|
---|
[3621] | 392 | IF_DESKTOP("nofail\0")
|
---|
[2725] | 393 | "_netdev\0"
|
---|
[3232] | 394 | IF_DESKTOP("comment=\0") /* systemd uses this in fstab */
|
---|
[2725] | 395 | )
|
---|
| 396 | IF_FEATURE_MOUNT_FLAGS(
|
---|
| 397 | // vfs flags
|
---|
| 398 | "nosuid\0"
|
---|
| 399 | "suid\0"
|
---|
| 400 | "dev\0"
|
---|
| 401 | "nodev\0"
|
---|
| 402 | "exec\0"
|
---|
| 403 | "noexec\0"
|
---|
| 404 | "sync\0"
|
---|
| 405 | "dirsync\0"
|
---|
| 406 | "async\0"
|
---|
| 407 | "atime\0"
|
---|
| 408 | "noatime\0"
|
---|
| 409 | "diratime\0"
|
---|
| 410 | "nodiratime\0"
|
---|
| 411 | "mand\0"
|
---|
| 412 | "nomand\0"
|
---|
| 413 | "relatime\0"
|
---|
| 414 | "norelatime\0"
|
---|
[3232] | 415 | "strictatime\0"
|
---|
[2725] | 416 | "loud\0"
|
---|
[3232] | 417 | "rbind\0"
|
---|
[1765] | 418 |
|
---|
[2725] | 419 | // action flags
|
---|
| 420 | "union\0"
|
---|
| 421 | "bind\0"
|
---|
| 422 | "move\0"
|
---|
[3232] | 423 | "make-shared\0"
|
---|
| 424 | "make-slave\0"
|
---|
| 425 | "make-private\0"
|
---|
| 426 | "make-unbindable\0"
|
---|
| 427 | "make-rshared\0"
|
---|
| 428 | "make-rslave\0"
|
---|
| 429 | "make-rprivate\0"
|
---|
| 430 | "make-runbindable\0"
|
---|
[2725] | 431 | )
|
---|
| 432 |
|
---|
[1765] | 433 | // Always understood.
|
---|
[2725] | 434 | "ro\0" // vfs flag
|
---|
| 435 | "rw\0" // vfs flag
|
---|
| 436 | "remount\0" // action flag
|
---|
| 437 | ;
|
---|
[1765] | 438 |
|
---|
[821] | 439 |
|
---|
[2725] | 440 | struct globals {
|
---|
| 441 | #if ENABLE_FEATURE_MOUNT_NFS
|
---|
| 442 | smalluint nfs_mount_version;
|
---|
| 443 | #endif
|
---|
| 444 | #if ENABLE_FEATURE_MOUNT_VERBOSE
|
---|
| 445 | unsigned verbose;
|
---|
| 446 | #endif
|
---|
| 447 | llist_t *fslist;
|
---|
| 448 | char getmntent_buf[1];
|
---|
| 449 | } FIX_ALIASING;
|
---|
| 450 | enum { GETMNTENT_BUFSIZE = COMMON_BUFSIZE - offsetof(struct globals, getmntent_buf) };
|
---|
[3621] | 451 | #define G (*(struct globals*)bb_common_bufsiz1)
|
---|
[2725] | 452 | #define nfs_mount_version (G.nfs_mount_version)
|
---|
| 453 | #if ENABLE_FEATURE_MOUNT_VERBOSE
|
---|
| 454 | #define verbose (G.verbose )
|
---|
| 455 | #else
|
---|
| 456 | #define verbose 0
|
---|
| 457 | #endif
|
---|
| 458 | #define fslist (G.fslist )
|
---|
| 459 | #define getmntent_buf (G.getmntent_buf )
|
---|
[3621] | 460 | #define INIT_G() do { setup_common_bufsiz(); } while (0)
|
---|
[1765] | 461 |
|
---|
[3232] | 462 | #if ENABLE_FEATURE_MTAB_SUPPORT
|
---|
| 463 | /*
|
---|
| 464 | * update_mtab_entry_on_move() is used to update entry in case of mount --move.
|
---|
| 465 | * we are looking for existing entries mnt_dir which is equal to mnt_fsname of
|
---|
| 466 | * input mntent and replace it by new one.
|
---|
| 467 | */
|
---|
| 468 | static void FAST_FUNC update_mtab_entry_on_move(const struct mntent *mp)
|
---|
| 469 | {
|
---|
| 470 | struct mntent *entries, *m;
|
---|
| 471 | int i, count;
|
---|
| 472 | FILE *mountTable;
|
---|
[2725] | 473 |
|
---|
[3232] | 474 | mountTable = setmntent(bb_path_mtab_file, "r");
|
---|
| 475 | if (!mountTable) {
|
---|
| 476 | bb_perror_msg(bb_path_mtab_file);
|
---|
| 477 | return;
|
---|
| 478 | }
|
---|
| 479 |
|
---|
| 480 | entries = NULL;
|
---|
| 481 | count = 0;
|
---|
| 482 | while ((m = getmntent(mountTable)) != NULL) {
|
---|
| 483 | entries = xrealloc_vector(entries, 3, count);
|
---|
| 484 | entries[count].mnt_fsname = xstrdup(m->mnt_fsname);
|
---|
| 485 | entries[count].mnt_dir = xstrdup(m->mnt_dir);
|
---|
| 486 | entries[count].mnt_type = xstrdup(m->mnt_type);
|
---|
| 487 | entries[count].mnt_opts = xstrdup(m->mnt_opts);
|
---|
| 488 | entries[count].mnt_freq = m->mnt_freq;
|
---|
| 489 | entries[count].mnt_passno = m->mnt_passno;
|
---|
| 490 | count++;
|
---|
| 491 | }
|
---|
| 492 | endmntent(mountTable);
|
---|
| 493 |
|
---|
| 494 | mountTable = setmntent(bb_path_mtab_file, "w");
|
---|
| 495 | if (mountTable) {
|
---|
| 496 | for (i = 0; i < count; i++) {
|
---|
| 497 | if (strcmp(entries[i].mnt_dir, mp->mnt_fsname) != 0)
|
---|
| 498 | addmntent(mountTable, &entries[i]);
|
---|
| 499 | else
|
---|
| 500 | addmntent(mountTable, mp);
|
---|
| 501 | }
|
---|
| 502 | endmntent(mountTable);
|
---|
| 503 | } else if (errno != EROFS)
|
---|
| 504 | bb_perror_msg(bb_path_mtab_file);
|
---|
| 505 |
|
---|
| 506 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 507 | for (i = 0; i < count; i++) {
|
---|
| 508 | free(entries[i].mnt_fsname);
|
---|
| 509 | free(entries[i].mnt_dir);
|
---|
| 510 | free(entries[i].mnt_type);
|
---|
| 511 | free(entries[i].mnt_opts);
|
---|
| 512 | }
|
---|
| 513 | free(entries);
|
---|
| 514 | }
|
---|
| 515 | }
|
---|
| 516 | #endif
|
---|
| 517 |
|
---|
[2725] | 518 | #if ENABLE_FEATURE_MOUNT_VERBOSE
|
---|
| 519 | static int verbose_mount(const char *source, const char *target,
|
---|
| 520 | const char *filesystemtype,
|
---|
| 521 | unsigned long mountflags, const void *data)
|
---|
| 522 | {
|
---|
| 523 | int rc;
|
---|
| 524 |
|
---|
| 525 | errno = 0;
|
---|
| 526 | rc = mount(source, target, filesystemtype, mountflags, data);
|
---|
| 527 | if (verbose >= 2)
|
---|
| 528 | bb_perror_msg("mount('%s','%s','%s',0x%08lx,'%s'):%d",
|
---|
| 529 | source, target, filesystemtype,
|
---|
| 530 | mountflags, (char*)data, rc);
|
---|
| 531 | return rc;
|
---|
| 532 | }
|
---|
| 533 | #else
|
---|
| 534 | #define verbose_mount(...) mount(__VA_ARGS__)
|
---|
| 535 | #endif
|
---|
| 536 |
|
---|
| 537 | // Append mount options to string
|
---|
[1765] | 538 | static void append_mount_options(char **oldopts, const char *newopts)
|
---|
[821] | 539 | {
|
---|
[1765] | 540 | if (*oldopts && **oldopts) {
|
---|
[2725] | 541 | // Do not insert options which are already there
|
---|
[1765] | 542 | while (newopts[0]) {
|
---|
| 543 | char *p;
|
---|
| 544 | int len = strlen(newopts);
|
---|
| 545 | p = strchr(newopts, ',');
|
---|
| 546 | if (p) len = p - newopts;
|
---|
| 547 | p = *oldopts;
|
---|
| 548 | while (1) {
|
---|
| 549 | if (!strncmp(p, newopts, len)
|
---|
[2725] | 550 | && (p[len] == ',' || p[len] == '\0'))
|
---|
[1765] | 551 | goto skip;
|
---|
| 552 | p = strchr(p,',');
|
---|
| 553 | if (!p) break;
|
---|
| 554 | p++;
|
---|
| 555 | }
|
---|
| 556 | p = xasprintf("%s,%.*s", *oldopts, len, newopts);
|
---|
| 557 | free(*oldopts);
|
---|
| 558 | *oldopts = p;
|
---|
[2725] | 559 | skip:
|
---|
[1765] | 560 | newopts += len;
|
---|
| 561 | while (newopts[0] == ',') newopts++;
|
---|
| 562 | }
|
---|
[821] | 563 | } else {
|
---|
| 564 | if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
|
---|
[1765] | 565 | *oldopts = xstrdup(newopts);
|
---|
[821] | 566 | }
|
---|
| 567 | }
|
---|
| 568 |
|
---|
[2725] | 569 | // Use the mount_options list to parse options into flags.
|
---|
| 570 | // Also update list of unrecognized options if unrecognized != NULL
|
---|
[3232] | 571 | static unsigned long parse_mount_options(char *options, char **unrecognized)
|
---|
[821] | 572 | {
|
---|
[3232] | 573 | unsigned long flags = MS_SILENT;
|
---|
[821] | 574 |
|
---|
| 575 | // Loop through options
|
---|
| 576 | for (;;) {
|
---|
[2725] | 577 | unsigned i;
|
---|
[821] | 578 | char *comma = strchr(options, ',');
|
---|
[2725] | 579 | const char *option_str = mount_option_str;
|
---|
[821] | 580 |
|
---|
[2725] | 581 | if (comma) *comma = '\0';
|
---|
[821] | 582 |
|
---|
[2725] | 583 | // FIXME: use hasmntopt()
|
---|
[821] | 584 | // Find this option in mount_options
|
---|
[1765] | 585 | for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
|
---|
[3232] | 586 | unsigned opt_len = strlen(option_str);
|
---|
| 587 |
|
---|
| 588 | if (strncasecmp(option_str, options, opt_len) == 0
|
---|
| 589 | && (options[opt_len] == '\0'
|
---|
| 590 | /* or is it "comment=" thingy in fstab? */
|
---|
| 591 | IF_FEATURE_MOUNT_FSTAB(IF_DESKTOP( || option_str[opt_len-1] == '=' ))
|
---|
| 592 | )
|
---|
| 593 | ) {
|
---|
| 594 | unsigned long fl = mount_options[i];
|
---|
| 595 | if (fl & BB_MS_INVERTED_VALUE)
|
---|
[2725] | 596 | flags &= fl;
|
---|
| 597 | else
|
---|
| 598 | flags |= fl;
|
---|
| 599 | goto found;
|
---|
[821] | 600 | }
|
---|
[3232] | 601 | option_str += opt_len + 1;
|
---|
[821] | 602 | }
|
---|
[2725] | 603 | // We did not recognize this option.
|
---|
| 604 | // If "unrecognized" is not NULL, append option there.
|
---|
| 605 | // Note that we should not append *empty* option -
|
---|
| 606 | // in this case we want to pass NULL, not "", to "data"
|
---|
| 607 | // parameter of mount(2) syscall.
|
---|
| 608 | // This is crucial for filesystems that don't accept
|
---|
| 609 | // any arbitrary mount options, like cgroup fs:
|
---|
| 610 | // "mount -t cgroup none /mnt"
|
---|
| 611 | if (options[0] && unrecognized) {
|
---|
[821] | 612 | // Add it to strflags, to pass on to kernel
|
---|
[2725] | 613 | char *p = *unrecognized;
|
---|
| 614 | unsigned len = p ? strlen(p) : 0;
|
---|
| 615 | *unrecognized = p = xrealloc(p, len + strlen(options) + 2);
|
---|
[821] | 616 |
|
---|
| 617 | // Comma separated if it's not the first one
|
---|
[2725] | 618 | if (len) p[len++] = ',';
|
---|
| 619 | strcpy(p + len, options);
|
---|
[821] | 620 | }
|
---|
[2725] | 621 | found:
|
---|
| 622 | if (!comma)
|
---|
| 623 | break;
|
---|
| 624 | // Advance to next option
|
---|
| 625 | *comma = ',';
|
---|
| 626 | options = ++comma;
|
---|
[821] | 627 | }
|
---|
| 628 |
|
---|
| 629 | return flags;
|
---|
| 630 | }
|
---|
| 631 |
|
---|
| 632 | // Return a list of all block device backed filesystems
|
---|
| 633 | static llist_t *get_block_backed_filesystems(void)
|
---|
| 634 | {
|
---|
[1765] | 635 | static const char filesystems[2][sizeof("/proc/filesystems")] = {
|
---|
| 636 | "/etc/filesystems",
|
---|
| 637 | "/proc/filesystems",
|
---|
| 638 | };
|
---|
| 639 | char *fs, *buf;
|
---|
[2725] | 640 | llist_t *list = NULL;
|
---|
[821] | 641 | int i;
|
---|
| 642 | FILE *f;
|
---|
| 643 |
|
---|
[1765] | 644 | for (i = 0; i < 2; i++) {
|
---|
[2725] | 645 | f = fopen_for_read(filesystems[i]);
|
---|
[1765] | 646 | if (!f) continue;
|
---|
[821] | 647 |
|
---|
[2725] | 648 | while ((buf = xmalloc_fgetline(f)) != NULL) {
|
---|
[3621] | 649 | if (is_prefixed_with(buf, "nodev") && isspace(buf[5]))
|
---|
[3232] | 650 | goto next;
|
---|
[1765] | 651 | fs = skip_whitespace(buf);
|
---|
[2725] | 652 | if (*fs == '#' || *fs == '*' || !*fs)
|
---|
[3232] | 653 | goto next;
|
---|
[821] | 654 |
|
---|
[1765] | 655 | llist_add_to_end(&list, xstrdup(fs));
|
---|
[3232] | 656 | next:
|
---|
[1765] | 657 | free(buf);
|
---|
[821] | 658 | }
|
---|
| 659 | if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | return list;
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
| 666 | static void delete_block_backed_filesystems(void)
|
---|
| 667 | {
|
---|
| 668 | llist_free(fslist, free);
|
---|
| 669 | }
|
---|
| 670 | #else
|
---|
| 671 | void delete_block_backed_filesystems(void);
|
---|
| 672 | #endif
|
---|
| 673 |
|
---|
| 674 | // Perform actual mount of specific filesystem at specific location.
|
---|
[1765] | 675 | // NB: mp->xxx fields may be trashed on exit
|
---|
[3232] | 676 | static int mount_it_now(struct mntent *mp, unsigned long vfsflags, char *filteropts)
|
---|
[821] | 677 | {
|
---|
[1765] | 678 | int rc = 0;
|
---|
[821] | 679 |
|
---|
[3621] | 680 | vfsflags &= ~(unsigned long)MOUNT_FAKEFLAGS;
|
---|
| 681 |
|
---|
[2725] | 682 | if (FAKE_IT) {
|
---|
| 683 | if (verbose >= 2)
|
---|
| 684 | bb_error_msg("would do mount('%s','%s','%s',0x%08lx,'%s')",
|
---|
| 685 | mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
|
---|
| 686 | vfsflags, filteropts);
|
---|
| 687 | goto mtab;
|
---|
| 688 | }
|
---|
[821] | 689 |
|
---|
| 690 | // Mount, with fallback to read-only if necessary.
|
---|
[1765] | 691 | for (;;) {
|
---|
[2725] | 692 | errno = 0;
|
---|
| 693 | rc = verbose_mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
|
---|
[821] | 694 | vfsflags, filteropts);
|
---|
[2725] | 695 |
|
---|
| 696 | // If mount failed, try
|
---|
| 697 | // helper program mount.<mnt_type>
|
---|
| 698 | if (HELPERS_ALLOWED && rc && mp->mnt_type) {
|
---|
| 699 | char *args[8];
|
---|
| 700 | int errno_save = errno;
|
---|
| 701 | args[0] = xasprintf("mount.%s", mp->mnt_type);
|
---|
| 702 | rc = 1;
|
---|
| 703 | if (FAKE_IT)
|
---|
| 704 | args[rc++] = (char *)"-f";
|
---|
| 705 | if (ENABLE_FEATURE_MTAB_SUPPORT && !USE_MTAB)
|
---|
| 706 | args[rc++] = (char *)"-n";
|
---|
| 707 | args[rc++] = mp->mnt_fsname;
|
---|
| 708 | args[rc++] = mp->mnt_dir;
|
---|
| 709 | if (filteropts) {
|
---|
| 710 | args[rc++] = (char *)"-o";
|
---|
| 711 | args[rc++] = filteropts;
|
---|
| 712 | }
|
---|
| 713 | args[rc] = NULL;
|
---|
| 714 | rc = spawn_and_wait(args);
|
---|
| 715 | free(args[0]);
|
---|
| 716 | if (!rc)
|
---|
| 717 | break;
|
---|
| 718 | errno = errno_save;
|
---|
| 719 | }
|
---|
| 720 |
|
---|
| 721 | if (!rc || (vfsflags & MS_RDONLY) || (errno != EACCES && errno != EROFS))
|
---|
[821] | 722 | break;
|
---|
[2725] | 723 | if (!(vfsflags & MS_SILENT))
|
---|
| 724 | bb_error_msg("%s is write-protected, mounting read-only",
|
---|
| 725 | mp->mnt_fsname);
|
---|
[821] | 726 | vfsflags |= MS_RDONLY;
|
---|
| 727 | }
|
---|
| 728 |
|
---|
| 729 | // Abort entirely if permission denied.
|
---|
| 730 |
|
---|
| 731 | if (rc && errno == EPERM)
|
---|
| 732 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
|
---|
| 733 |
|
---|
[2725] | 734 | // If the mount was successful, and we're maintaining an old-style
|
---|
| 735 | // mtab file by hand, add the new entry to it now.
|
---|
[1765] | 736 | mtab:
|
---|
[2725] | 737 | if (USE_MTAB && !rc && !(vfsflags & MS_REMOUNT)) {
|
---|
[1765] | 738 | char *fsname;
|
---|
[821] | 739 | FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
|
---|
[2725] | 740 | const char *option_str = mount_option_str;
|
---|
[821] | 741 | int i;
|
---|
| 742 |
|
---|
[1765] | 743 | if (!mountTable) {
|
---|
[3232] | 744 | bb_perror_msg(bb_path_mtab_file);
|
---|
[1765] | 745 | goto ret;
|
---|
| 746 | }
|
---|
[821] | 747 |
|
---|
| 748 | // Add vfs string flags
|
---|
[2725] | 749 | for (i = 0; mount_options[i] != MS_REMOUNT; i++) {
|
---|
| 750 | if (mount_options[i] > 0 && (mount_options[i] & vfsflags))
|
---|
| 751 | append_mount_options(&(mp->mnt_opts), option_str);
|
---|
| 752 | option_str += strlen(option_str) + 1;
|
---|
| 753 | }
|
---|
[821] | 754 |
|
---|
| 755 | // Remove trailing / (if any) from directory we mounted on
|
---|
[1765] | 756 | i = strlen(mp->mnt_dir) - 1;
|
---|
[3232] | 757 | while (i > 0 && mp->mnt_dir[i] == '/')
|
---|
| 758 | mp->mnt_dir[i--] = '\0';
|
---|
[821] | 759 |
|
---|
[1765] | 760 | // Convert to canonical pathnames as needed
|
---|
| 761 | mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
|
---|
[3232] | 762 | fsname = NULL;
|
---|
[2725] | 763 | if (!mp->mnt_type || !*mp->mnt_type) { // bind mount
|
---|
[1765] | 764 | mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
|
---|
| 765 | mp->mnt_type = (char*)"bind";
|
---|
| 766 | }
|
---|
| 767 | mp->mnt_freq = mp->mnt_passno = 0;
|
---|
| 768 |
|
---|
[3232] | 769 | // Write and close
|
---|
| 770 | #if ENABLE_FEATURE_MTAB_SUPPORT
|
---|
| 771 | if (vfsflags & MS_MOVE)
|
---|
| 772 | update_mtab_entry_on_move(mp);
|
---|
| 773 | else
|
---|
| 774 | #endif
|
---|
| 775 | addmntent(mountTable, mp);
|
---|
| 776 | endmntent(mountTable);
|
---|
[821] | 777 |
|
---|
[1765] | 778 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 779 | free(mp->mnt_dir);
|
---|
| 780 | free(fsname);
|
---|
| 781 | }
|
---|
[821] | 782 | }
|
---|
[1765] | 783 | ret:
|
---|
[821] | 784 | return rc;
|
---|
| 785 | }
|
---|
| 786 |
|
---|
[1765] | 787 | #if ENABLE_FEATURE_MOUNT_NFS
|
---|
[821] | 788 |
|
---|
[1765] | 789 | /*
|
---|
| 790 | * Linux NFS mount
|
---|
| 791 | * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
|
---|
| 792 | *
|
---|
[2725] | 793 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
[1765] | 794 | *
|
---|
| 795 | * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
|
---|
| 796 | * numbers to be specified on the command line.
|
---|
| 797 | *
|
---|
| 798 | * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
|
---|
| 799 | * Omit the call to connect() for Linux version 1.3.11 or later.
|
---|
| 800 | *
|
---|
| 801 | * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
|
---|
| 802 | * Implemented the "bg", "fg" and "retry" mount options for NFS.
|
---|
| 803 | *
|
---|
[2725] | 804 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
|
---|
[1765] | 805 | * - added Native Language Support
|
---|
| 806 | *
|
---|
| 807 | * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
|
---|
| 808 | * plus NFSv3 stuff.
|
---|
| 809 | */
|
---|
[821] | 810 |
|
---|
[1765] | 811 | #define MOUNTPORT 635
|
---|
| 812 | #define MNTPATHLEN 1024
|
---|
| 813 | #define MNTNAMLEN 255
|
---|
| 814 | #define FHSIZE 32
|
---|
| 815 | #define FHSIZE3 64
|
---|
| 816 |
|
---|
| 817 | typedef char fhandle[FHSIZE];
|
---|
| 818 |
|
---|
| 819 | typedef struct {
|
---|
| 820 | unsigned int fhandle3_len;
|
---|
| 821 | char *fhandle3_val;
|
---|
| 822 | } fhandle3;
|
---|
| 823 |
|
---|
| 824 | enum mountstat3 {
|
---|
| 825 | MNT_OK = 0,
|
---|
| 826 | MNT3ERR_PERM = 1,
|
---|
| 827 | MNT3ERR_NOENT = 2,
|
---|
| 828 | MNT3ERR_IO = 5,
|
---|
| 829 | MNT3ERR_ACCES = 13,
|
---|
| 830 | MNT3ERR_NOTDIR = 20,
|
---|
| 831 | MNT3ERR_INVAL = 22,
|
---|
| 832 | MNT3ERR_NAMETOOLONG = 63,
|
---|
| 833 | MNT3ERR_NOTSUPP = 10004,
|
---|
| 834 | MNT3ERR_SERVERFAULT = 10006,
|
---|
| 835 | };
|
---|
| 836 | typedef enum mountstat3 mountstat3;
|
---|
| 837 |
|
---|
| 838 | struct fhstatus {
|
---|
| 839 | unsigned int fhs_status;
|
---|
| 840 | union {
|
---|
| 841 | fhandle fhs_fhandle;
|
---|
| 842 | } fhstatus_u;
|
---|
| 843 | };
|
---|
| 844 | typedef struct fhstatus fhstatus;
|
---|
| 845 |
|
---|
| 846 | struct mountres3_ok {
|
---|
| 847 | fhandle3 fhandle;
|
---|
| 848 | struct {
|
---|
| 849 | unsigned int auth_flavours_len;
|
---|
| 850 | char *auth_flavours_val;
|
---|
| 851 | } auth_flavours;
|
---|
| 852 | };
|
---|
| 853 | typedef struct mountres3_ok mountres3_ok;
|
---|
| 854 |
|
---|
| 855 | struct mountres3 {
|
---|
| 856 | mountstat3 fhs_status;
|
---|
| 857 | union {
|
---|
| 858 | mountres3_ok mountinfo;
|
---|
| 859 | } mountres3_u;
|
---|
| 860 | };
|
---|
| 861 | typedef struct mountres3 mountres3;
|
---|
| 862 |
|
---|
| 863 | typedef char *dirpath;
|
---|
| 864 |
|
---|
| 865 | typedef char *name;
|
---|
| 866 |
|
---|
| 867 | typedef struct mountbody *mountlist;
|
---|
| 868 |
|
---|
| 869 | struct mountbody {
|
---|
| 870 | name ml_hostname;
|
---|
| 871 | dirpath ml_directory;
|
---|
| 872 | mountlist ml_next;
|
---|
| 873 | };
|
---|
| 874 | typedef struct mountbody mountbody;
|
---|
| 875 |
|
---|
| 876 | typedef struct groupnode *groups;
|
---|
| 877 |
|
---|
| 878 | struct groupnode {
|
---|
| 879 | name gr_name;
|
---|
| 880 | groups gr_next;
|
---|
| 881 | };
|
---|
| 882 | typedef struct groupnode groupnode;
|
---|
| 883 |
|
---|
| 884 | typedef struct exportnode *exports;
|
---|
| 885 |
|
---|
| 886 | struct exportnode {
|
---|
| 887 | dirpath ex_dir;
|
---|
| 888 | groups ex_groups;
|
---|
| 889 | exports ex_next;
|
---|
| 890 | };
|
---|
| 891 | typedef struct exportnode exportnode;
|
---|
| 892 |
|
---|
| 893 | struct ppathcnf {
|
---|
| 894 | int pc_link_max;
|
---|
| 895 | short pc_max_canon;
|
---|
| 896 | short pc_max_input;
|
---|
| 897 | short pc_name_max;
|
---|
| 898 | short pc_path_max;
|
---|
| 899 | short pc_pipe_buf;
|
---|
| 900 | uint8_t pc_vdisable;
|
---|
| 901 | char pc_xxx;
|
---|
| 902 | short pc_mask[2];
|
---|
| 903 | };
|
---|
| 904 | typedef struct ppathcnf ppathcnf;
|
---|
| 905 |
|
---|
| 906 | #define MOUNTPROG 100005
|
---|
| 907 | #define MOUNTVERS 1
|
---|
| 908 |
|
---|
| 909 | #define MOUNTPROC_NULL 0
|
---|
| 910 | #define MOUNTPROC_MNT 1
|
---|
| 911 | #define MOUNTPROC_DUMP 2
|
---|
| 912 | #define MOUNTPROC_UMNT 3
|
---|
| 913 | #define MOUNTPROC_UMNTALL 4
|
---|
| 914 | #define MOUNTPROC_EXPORT 5
|
---|
| 915 | #define MOUNTPROC_EXPORTALL 6
|
---|
| 916 |
|
---|
| 917 | #define MOUNTVERS_POSIX 2
|
---|
| 918 |
|
---|
| 919 | #define MOUNTPROC_PATHCONF 7
|
---|
| 920 |
|
---|
| 921 | #define MOUNT_V3 3
|
---|
| 922 |
|
---|
| 923 | #define MOUNTPROC3_NULL 0
|
---|
| 924 | #define MOUNTPROC3_MNT 1
|
---|
| 925 | #define MOUNTPROC3_DUMP 2
|
---|
| 926 | #define MOUNTPROC3_UMNT 3
|
---|
| 927 | #define MOUNTPROC3_UMNTALL 4
|
---|
| 928 | #define MOUNTPROC3_EXPORT 5
|
---|
| 929 |
|
---|
| 930 | enum {
|
---|
| 931 | #ifndef NFS_FHSIZE
|
---|
| 932 | NFS_FHSIZE = 32,
|
---|
| 933 | #endif
|
---|
| 934 | #ifndef NFS_PORT
|
---|
| 935 | NFS_PORT = 2049
|
---|
| 936 | #endif
|
---|
| 937 | };
|
---|
| 938 |
|
---|
| 939 | /*
|
---|
| 940 | * We want to be able to compile mount on old kernels in such a way
|
---|
| 941 | * that the binary will work well on more recent kernels.
|
---|
| 942 | * Thus, if necessary we teach nfsmount.c the structure of new fields
|
---|
| 943 | * that will come later.
|
---|
| 944 | *
|
---|
| 945 | * Moreover, the new kernel includes conflict with glibc includes
|
---|
| 946 | * so it is easiest to ignore the kernel altogether (at compile time).
|
---|
| 947 | */
|
---|
| 948 |
|
---|
| 949 | struct nfs2_fh {
|
---|
[3232] | 950 | char data[32];
|
---|
[1765] | 951 | };
|
---|
| 952 | struct nfs3_fh {
|
---|
[3232] | 953 | unsigned short size;
|
---|
| 954 | unsigned char data[64];
|
---|
[1765] | 955 | };
|
---|
| 956 |
|
---|
| 957 | struct nfs_mount_data {
|
---|
[3232] | 958 | int version; /* 1 */
|
---|
| 959 | int fd; /* 1 */
|
---|
| 960 | struct nfs2_fh old_root; /* 1 */
|
---|
| 961 | int flags; /* 1 */
|
---|
| 962 | int rsize; /* 1 */
|
---|
| 963 | int wsize; /* 1 */
|
---|
| 964 | int timeo; /* 1 */
|
---|
| 965 | int retrans; /* 1 */
|
---|
| 966 | int acregmin; /* 1 */
|
---|
| 967 | int acregmax; /* 1 */
|
---|
| 968 | int acdirmin; /* 1 */
|
---|
| 969 | int acdirmax; /* 1 */
|
---|
| 970 | struct sockaddr_in addr; /* 1 */
|
---|
| 971 | char hostname[256]; /* 1 */
|
---|
| 972 | int namlen; /* 2 */
|
---|
| 973 | unsigned int bsize; /* 3 */
|
---|
| 974 | struct nfs3_fh root; /* 4 */
|
---|
[1765] | 975 | };
|
---|
| 976 |
|
---|
| 977 | /* bits in the flags field */
|
---|
| 978 | enum {
|
---|
| 979 | NFS_MOUNT_SOFT = 0x0001, /* 1 */
|
---|
| 980 | NFS_MOUNT_INTR = 0x0002, /* 1 */
|
---|
| 981 | NFS_MOUNT_SECURE = 0x0004, /* 1 */
|
---|
| 982 | NFS_MOUNT_POSIX = 0x0008, /* 1 */
|
---|
| 983 | NFS_MOUNT_NOCTO = 0x0010, /* 1 */
|
---|
| 984 | NFS_MOUNT_NOAC = 0x0020, /* 1 */
|
---|
| 985 | NFS_MOUNT_TCP = 0x0040, /* 2 */
|
---|
| 986 | NFS_MOUNT_VER3 = 0x0080, /* 3 */
|
---|
| 987 | NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
|
---|
[2725] | 988 | NFS_MOUNT_NONLM = 0x0200, /* 3 */
|
---|
[3232] | 989 | NFS_MOUNT_NOACL = 0x0800, /* 4 */
|
---|
[2725] | 990 | NFS_MOUNT_NORDIRPLUS = 0x4000
|
---|
[1765] | 991 | };
|
---|
| 992 |
|
---|
| 993 |
|
---|
| 994 | /*
|
---|
| 995 | * We need to translate between nfs status return values and
|
---|
| 996 | * the local errno values which may not be the same.
|
---|
| 997 | *
|
---|
| 998 | * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
|
---|
| 999 | * "after #include <errno.h> the symbol errno is reserved for any use,
|
---|
| 1000 | * it cannot even be used as a struct tag or field name".
|
---|
| 1001 | */
|
---|
| 1002 | #ifndef EDQUOT
|
---|
[2725] | 1003 | # define EDQUOT ENOSPC
|
---|
[1765] | 1004 | #endif
|
---|
[2725] | 1005 | /* Convert each NFSERR_BLAH into EBLAH */
|
---|
[3621] | 1006 | static const uint8_t nfs_err_stat[] ALIGN1 = {
|
---|
[2725] | 1007 | 1, 2, 5, 6, 13, 17,
|
---|
| 1008 | 19, 20, 21, 22, 27, 28,
|
---|
| 1009 | 30, 63, 66, 69, 70, 71
|
---|
[1765] | 1010 | };
|
---|
[2725] | 1011 | #if ( \
|
---|
| 1012 | EPERM | ENOENT | EIO | ENXIO | EACCES| EEXIST | \
|
---|
| 1013 | ENODEV| ENOTDIR | EISDIR | EINVAL| EFBIG | ENOSPC | \
|
---|
| 1014 | EROFS | ENAMETOOLONG| ENOTEMPTY| EDQUOT| ESTALE| EREMOTE) < 256
|
---|
| 1015 | typedef uint8_t nfs_err_type;
|
---|
| 1016 | #else
|
---|
| 1017 | typedef uint16_t nfs_err_type;
|
---|
| 1018 | #endif
|
---|
[3621] | 1019 | static const nfs_err_type nfs_err_errnum[] ALIGN2 = {
|
---|
[2725] | 1020 | EPERM , ENOENT , EIO , ENXIO , EACCES, EEXIST,
|
---|
| 1021 | ENODEV, ENOTDIR , EISDIR , EINVAL, EFBIG , ENOSPC,
|
---|
| 1022 | EROFS , ENAMETOOLONG, ENOTEMPTY, EDQUOT, ESTALE, EREMOTE
|
---|
| 1023 | };
|
---|
[1765] | 1024 | static char *nfs_strerror(int status)
|
---|
| 1025 | {
|
---|
| 1026 | int i;
|
---|
| 1027 |
|
---|
[2725] | 1028 | for (i = 0; i < ARRAY_SIZE(nfs_err_stat); i++) {
|
---|
| 1029 | if (nfs_err_stat[i] == status)
|
---|
| 1030 | return strerror(nfs_err_errnum[i]);
|
---|
[1765] | 1031 | }
|
---|
[2725] | 1032 | return xasprintf("unknown nfs status return value: %d", status);
|
---|
[1765] | 1033 | }
|
---|
| 1034 |
|
---|
| 1035 | static bool_t xdr_fhandle(XDR *xdrs, fhandle objp)
|
---|
| 1036 | {
|
---|
[2725] | 1037 | return xdr_opaque(xdrs, objp, FHSIZE);
|
---|
[1765] | 1038 | }
|
---|
| 1039 |
|
---|
| 1040 | static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp)
|
---|
| 1041 | {
|
---|
| 1042 | if (!xdr_u_int(xdrs, &objp->fhs_status))
|
---|
[3232] | 1043 | return FALSE;
|
---|
[2725] | 1044 | if (objp->fhs_status == 0)
|
---|
| 1045 | return xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle);
|
---|
[1765] | 1046 | return TRUE;
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
|
---|
| 1050 | {
|
---|
[2725] | 1051 | return xdr_string(xdrs, objp, MNTPATHLEN);
|
---|
[1765] | 1052 | }
|
---|
| 1053 |
|
---|
| 1054 | static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp)
|
---|
| 1055 | {
|
---|
[2725] | 1056 | return xdr_bytes(xdrs, (char **)&objp->fhandle3_val,
|
---|
[3232] | 1057 | (unsigned int *) &objp->fhandle3_len,
|
---|
| 1058 | FHSIZE3);
|
---|
[1765] | 1059 | }
|
---|
| 1060 |
|
---|
| 1061 | static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
|
---|
| 1062 | {
|
---|
| 1063 | if (!xdr_fhandle3(xdrs, &objp->fhandle))
|
---|
| 1064 | return FALSE;
|
---|
[2725] | 1065 | return xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val),
|
---|
[3232] | 1066 | &(objp->auth_flavours.auth_flavours_len),
|
---|
| 1067 | ~0,
|
---|
| 1068 | sizeof(int),
|
---|
| 1069 | (xdrproc_t) xdr_int);
|
---|
[1765] | 1070 | }
|
---|
| 1071 |
|
---|
| 1072 | static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
|
---|
| 1073 | {
|
---|
[2725] | 1074 | return xdr_enum(xdrs, (enum_t *) objp);
|
---|
[1765] | 1075 | }
|
---|
| 1076 |
|
---|
| 1077 | static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
|
---|
| 1078 | {
|
---|
| 1079 | if (!xdr_mountstat3(xdrs, &objp->fhs_status))
|
---|
| 1080 | return FALSE;
|
---|
[2725] | 1081 | if (objp->fhs_status == MNT_OK)
|
---|
| 1082 | return xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo);
|
---|
[1765] | 1083 | return TRUE;
|
---|
| 1084 | }
|
---|
| 1085 |
|
---|
| 1086 | #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
|
---|
| 1087 |
|
---|
| 1088 | /*
|
---|
| 1089 | * Unfortunately, the kernel prints annoying console messages
|
---|
| 1090 | * in case of an unexpected nfs mount version (instead of
|
---|
| 1091 | * just returning some error). Therefore we'll have to try
|
---|
| 1092 | * and figure out what version the kernel expects.
|
---|
| 1093 | *
|
---|
| 1094 | * Variables:
|
---|
| 1095 | * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
|
---|
| 1096 | * NFS_MOUNT_VERSION: these nfsmount sources at compile time
|
---|
| 1097 | * nfs_mount_version: version this source and running kernel can handle
|
---|
| 1098 | */
|
---|
| 1099 | static void
|
---|
| 1100 | find_kernel_nfs_mount_version(void)
|
---|
| 1101 | {
|
---|
[2725] | 1102 | int kernel_version;
|
---|
| 1103 |
|
---|
| 1104 | if (nfs_mount_version)
|
---|
[1765] | 1105 | return;
|
---|
| 1106 |
|
---|
| 1107 | nfs_mount_version = 4; /* default */
|
---|
| 1108 |
|
---|
| 1109 | kernel_version = get_linux_version_code();
|
---|
| 1110 | if (kernel_version) {
|
---|
[2725] | 1111 | if (kernel_version < KERNEL_VERSION(2,2,18))
|
---|
[1765] | 1112 | nfs_mount_version = 3;
|
---|
| 1113 | /* else v4 since 2.3.99pre4 */
|
---|
| 1114 | }
|
---|
| 1115 | }
|
---|
| 1116 |
|
---|
[2725] | 1117 | static void
|
---|
| 1118 | get_mountport(struct pmap *pm_mnt,
|
---|
| 1119 | struct sockaddr_in *server_addr,
|
---|
[1765] | 1120 | long unsigned prog,
|
---|
| 1121 | long unsigned version,
|
---|
| 1122 | long unsigned proto,
|
---|
| 1123 | long unsigned port)
|
---|
| 1124 | {
|
---|
| 1125 | struct pmaplist *pmap;
|
---|
| 1126 |
|
---|
| 1127 | server_addr->sin_port = PMAPPORT;
|
---|
| 1128 | /* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
|
---|
| 1129 | * I understand it like "IPv6 for this is not 100% ready" */
|
---|
| 1130 | pmap = pmap_getmaps(server_addr);
|
---|
| 1131 |
|
---|
| 1132 | if (version > MAX_NFSPROT)
|
---|
| 1133 | version = MAX_NFSPROT;
|
---|
| 1134 | if (!prog)
|
---|
| 1135 | prog = MOUNTPROG;
|
---|
[2725] | 1136 | pm_mnt->pm_prog = prog;
|
---|
| 1137 | pm_mnt->pm_vers = version;
|
---|
| 1138 | pm_mnt->pm_prot = proto;
|
---|
| 1139 | pm_mnt->pm_port = port;
|
---|
[1765] | 1140 |
|
---|
| 1141 | while (pmap) {
|
---|
| 1142 | if (pmap->pml_map.pm_prog != prog)
|
---|
| 1143 | goto next;
|
---|
[2725] | 1144 | if (!version && pm_mnt->pm_vers > pmap->pml_map.pm_vers)
|
---|
[1765] | 1145 | goto next;
|
---|
| 1146 | if (version > 2 && pmap->pml_map.pm_vers != version)
|
---|
| 1147 | goto next;
|
---|
| 1148 | if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
|
---|
| 1149 | goto next;
|
---|
[2725] | 1150 | if (pmap->pml_map.pm_vers > MAX_NFSPROT
|
---|
| 1151 | || (proto && pm_mnt->pm_prot && pmap->pml_map.pm_prot != proto)
|
---|
| 1152 | || (port && pmap->pml_map.pm_port != port)
|
---|
| 1153 | ) {
|
---|
[1765] | 1154 | goto next;
|
---|
[2725] | 1155 | }
|
---|
| 1156 | memcpy(pm_mnt, &pmap->pml_map, sizeof(*pm_mnt));
|
---|
| 1157 | next:
|
---|
[1765] | 1158 | pmap = pmap->pml_next;
|
---|
| 1159 | }
|
---|
[2725] | 1160 | if (!pm_mnt->pm_vers)
|
---|
| 1161 | pm_mnt->pm_vers = MOUNTVERS;
|
---|
| 1162 | if (!pm_mnt->pm_port)
|
---|
| 1163 | pm_mnt->pm_port = MOUNTPORT;
|
---|
| 1164 | if (!pm_mnt->pm_prot)
|
---|
| 1165 | pm_mnt->pm_prot = IPPROTO_TCP;
|
---|
[1765] | 1166 | }
|
---|
| 1167 |
|
---|
[2725] | 1168 | #if BB_MMU
|
---|
[1765] | 1169 | static int daemonize(void)
|
---|
| 1170 | {
|
---|
| 1171 | int pid = fork();
|
---|
| 1172 | if (pid < 0) /* error */
|
---|
| 1173 | return -errno;
|
---|
| 1174 | if (pid > 0) /* parent */
|
---|
| 1175 | return 0;
|
---|
| 1176 | /* child */
|
---|
[2725] | 1177 | close(0);
|
---|
| 1178 | xopen(bb_dev_null, O_RDWR);
|
---|
| 1179 | xdup2(0, 1);
|
---|
| 1180 | xdup2(0, 2);
|
---|
[1765] | 1181 | setsid();
|
---|
| 1182 | openlog(applet_name, LOG_PID, LOG_DAEMON);
|
---|
| 1183 | logmode = LOGMODE_SYSLOG;
|
---|
| 1184 | return 1;
|
---|
| 1185 | }
|
---|
[2725] | 1186 | #else
|
---|
| 1187 | static inline int daemonize(void) { return -ENOSYS; }
|
---|
| 1188 | #endif
|
---|
[1765] | 1189 |
|
---|
[2725] | 1190 | /* TODO */
|
---|
| 1191 | static inline int we_saw_this_host_before(const char *hostname UNUSED_PARAM)
|
---|
[1765] | 1192 | {
|
---|
| 1193 | return 0;
|
---|
| 1194 | }
|
---|
| 1195 |
|
---|
| 1196 | /* RPC strerror analogs are terminally idiotic:
|
---|
| 1197 | * *mandatory* prefix and \n at end.
|
---|
| 1198 | * This hopefully helps. Usage:
|
---|
| 1199 | * error_msg_rpc(clnt_*error*(" ")) */
|
---|
| 1200 | static void error_msg_rpc(const char *msg)
|
---|
| 1201 | {
|
---|
| 1202 | int len;
|
---|
| 1203 | while (msg[0] == ' ' || msg[0] == ':') msg++;
|
---|
| 1204 | len = strlen(msg);
|
---|
| 1205 | while (len && msg[len-1] == '\n') len--;
|
---|
| 1206 | bb_error_msg("%.*s", len, msg);
|
---|
| 1207 | }
|
---|
| 1208 |
|
---|
[2725] | 1209 | /* NB: mp->xxx fields may be trashed on exit */
|
---|
[3232] | 1210 | static NOINLINE int nfsmount(struct mntent *mp, unsigned long vfsflags, char *filteropts)
|
---|
[1765] | 1211 | {
|
---|
| 1212 | CLIENT *mclient;
|
---|
| 1213 | char *hostname;
|
---|
| 1214 | char *pathname;
|
---|
| 1215 | char *mounthost;
|
---|
[2725] | 1216 | /* prior to 2.6.23, kernel took NFS options in a form of this struct
|
---|
| 1217 | * only. 2.6.23+ looks at data->version, and if it's not 1..6,
|
---|
| 1218 | * then data pointer is interpreted as a string. */
|
---|
[1765] | 1219 | struct nfs_mount_data data;
|
---|
| 1220 | char *opt;
|
---|
| 1221 | struct hostent *hp;
|
---|
| 1222 | struct sockaddr_in server_addr;
|
---|
| 1223 | struct sockaddr_in mount_server_addr;
|
---|
| 1224 | int msock, fsock;
|
---|
| 1225 | union {
|
---|
| 1226 | struct fhstatus nfsv2;
|
---|
| 1227 | struct mountres3 nfsv3;
|
---|
| 1228 | } status;
|
---|
| 1229 | int daemonized;
|
---|
| 1230 | char *s;
|
---|
| 1231 | int port;
|
---|
| 1232 | int mountport;
|
---|
| 1233 | int proto;
|
---|
[2725] | 1234 | #if BB_MMU
|
---|
| 1235 | smallint bg = 0;
|
---|
| 1236 | #else
|
---|
| 1237 | enum { bg = 0 };
|
---|
| 1238 | #endif
|
---|
[1765] | 1239 | int retry;
|
---|
| 1240 | int mountprog;
|
---|
| 1241 | int mountvers;
|
---|
| 1242 | int nfsprog;
|
---|
| 1243 | int nfsvers;
|
---|
| 1244 | int retval;
|
---|
[2725] | 1245 | /* these all are one-bit really. gcc 4.3.1 likes this combination: */
|
---|
| 1246 | smallint tcp;
|
---|
| 1247 | smallint soft;
|
---|
| 1248 | int intr;
|
---|
| 1249 | int posix;
|
---|
| 1250 | int nocto;
|
---|
| 1251 | int noac;
|
---|
| 1252 | int nordirplus;
|
---|
| 1253 | int nolock;
|
---|
[3232] | 1254 | int noacl;
|
---|
[1765] | 1255 |
|
---|
| 1256 | find_kernel_nfs_mount_version();
|
---|
| 1257 |
|
---|
| 1258 | daemonized = 0;
|
---|
| 1259 | mounthost = NULL;
|
---|
| 1260 | retval = ETIMEDOUT;
|
---|
| 1261 | msock = fsock = -1;
|
---|
| 1262 | mclient = NULL;
|
---|
| 1263 |
|
---|
| 1264 | /* NB: hostname, mounthost, filteropts must be free()d prior to return */
|
---|
| 1265 |
|
---|
| 1266 | filteropts = xstrdup(filteropts); /* going to trash it later... */
|
---|
| 1267 |
|
---|
| 1268 | hostname = xstrdup(mp->mnt_fsname);
|
---|
| 1269 | /* mount_main() guarantees that ':' is there */
|
---|
| 1270 | s = strchr(hostname, ':');
|
---|
| 1271 | pathname = s + 1;
|
---|
| 1272 | *s = '\0';
|
---|
| 1273 | /* Ignore all but first hostname in replicated mounts
|
---|
[3232] | 1274 | * until they can be fully supported. (mack@sgi.com) */
|
---|
[1765] | 1275 | s = strchr(hostname, ',');
|
---|
| 1276 | if (s) {
|
---|
| 1277 | *s = '\0';
|
---|
| 1278 | bb_error_msg("warning: multiple hostnames not supported");
|
---|
| 1279 | }
|
---|
| 1280 |
|
---|
| 1281 | server_addr.sin_family = AF_INET;
|
---|
| 1282 | if (!inet_aton(hostname, &server_addr.sin_addr)) {
|
---|
| 1283 | hp = gethostbyname(hostname);
|
---|
| 1284 | if (hp == NULL) {
|
---|
| 1285 | bb_herror_msg("%s", hostname);
|
---|
| 1286 | goto fail;
|
---|
| 1287 | }
|
---|
[2725] | 1288 | if (hp->h_length != (int)sizeof(struct in_addr)) {
|
---|
| 1289 | bb_error_msg_and_die("only IPv4 is supported");
|
---|
[1765] | 1290 | }
|
---|
[2725] | 1291 | memcpy(&server_addr.sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
|
---|
[1765] | 1292 | }
|
---|
| 1293 |
|
---|
| 1294 | memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
|
---|
| 1295 |
|
---|
| 1296 | /* add IP address to mtab options for use when unmounting */
|
---|
| 1297 |
|
---|
| 1298 | if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
|
---|
| 1299 | mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
|
---|
| 1300 | } else {
|
---|
| 1301 | char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
|
---|
| 1302 | mp->mnt_opts[0] ? "," : "",
|
---|
| 1303 | inet_ntoa(server_addr.sin_addr));
|
---|
| 1304 | free(mp->mnt_opts);
|
---|
| 1305 | mp->mnt_opts = tmp;
|
---|
| 1306 | }
|
---|
| 1307 |
|
---|
| 1308 | /* Set default options.
|
---|
| 1309 | * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
|
---|
| 1310 | * let the kernel decide.
|
---|
| 1311 | * timeo is filled in after we know whether it'll be TCP or UDP. */
|
---|
| 1312 | memset(&data, 0, sizeof(data));
|
---|
[2725] | 1313 | data.retrans = 3;
|
---|
| 1314 | data.acregmin = 3;
|
---|
| 1315 | data.acregmax = 60;
|
---|
| 1316 | data.acdirmin = 30;
|
---|
| 1317 | data.acdirmax = 60;
|
---|
| 1318 | data.namlen = NAME_MAX;
|
---|
[1765] | 1319 |
|
---|
| 1320 | soft = 0;
|
---|
| 1321 | intr = 0;
|
---|
| 1322 | posix = 0;
|
---|
| 1323 | nocto = 0;
|
---|
| 1324 | nolock = 0;
|
---|
| 1325 | noac = 0;
|
---|
[2725] | 1326 | nordirplus = 0;
|
---|
[3232] | 1327 | noacl = 0;
|
---|
[1765] | 1328 | retry = 10000; /* 10000 minutes ~ 1 week */
|
---|
[3232] | 1329 | tcp = 1; /* nfs-utils uses tcp per default */
|
---|
[1765] | 1330 |
|
---|
| 1331 | mountprog = MOUNTPROG;
|
---|
| 1332 | mountvers = 0;
|
---|
| 1333 | port = 0;
|
---|
| 1334 | mountport = 0;
|
---|
| 1335 | nfsprog = 100003;
|
---|
| 1336 | nfsvers = 0;
|
---|
| 1337 |
|
---|
| 1338 | /* parse options */
|
---|
| 1339 | if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
|
---|
| 1340 | char *opteq = strchr(opt, '=');
|
---|
| 1341 | if (opteq) {
|
---|
[2725] | 1342 | int val, idx;
|
---|
[1765] | 1343 | static const char options[] ALIGN1 =
|
---|
| 1344 | /* 0 */ "rsize\0"
|
---|
| 1345 | /* 1 */ "wsize\0"
|
---|
| 1346 | /* 2 */ "timeo\0"
|
---|
| 1347 | /* 3 */ "retrans\0"
|
---|
| 1348 | /* 4 */ "acregmin\0"
|
---|
| 1349 | /* 5 */ "acregmax\0"
|
---|
| 1350 | /* 6 */ "acdirmin\0"
|
---|
| 1351 | /* 7 */ "acdirmax\0"
|
---|
| 1352 | /* 8 */ "actimeo\0"
|
---|
| 1353 | /* 9 */ "retry\0"
|
---|
| 1354 | /* 10 */ "port\0"
|
---|
| 1355 | /* 11 */ "mountport\0"
|
---|
| 1356 | /* 12 */ "mounthost\0"
|
---|
| 1357 | /* 13 */ "mountprog\0"
|
---|
| 1358 | /* 14 */ "mountvers\0"
|
---|
| 1359 | /* 15 */ "nfsprog\0"
|
---|
| 1360 | /* 16 */ "nfsvers\0"
|
---|
| 1361 | /* 17 */ "vers\0"
|
---|
| 1362 | /* 18 */ "proto\0"
|
---|
| 1363 | /* 19 */ "namlen\0"
|
---|
| 1364 | /* 20 */ "addr\0";
|
---|
[2725] | 1365 |
|
---|
| 1366 | *opteq++ = '\0';
|
---|
| 1367 | idx = index_in_strings(options, opt);
|
---|
| 1368 | switch (idx) {
|
---|
| 1369 | case 12: // "mounthost"
|
---|
| 1370 | mounthost = xstrndup(opteq,
|
---|
| 1371 | strcspn(opteq, " \t\n\r,"));
|
---|
| 1372 | continue;
|
---|
| 1373 | case 18: // "proto"
|
---|
[3621] | 1374 | if (is_prefixed_with(opteq, "tcp"))
|
---|
[2725] | 1375 | tcp = 1;
|
---|
[3621] | 1376 | else if (is_prefixed_with(opteq, "udp"))
|
---|
[2725] | 1377 | tcp = 0;
|
---|
| 1378 | else
|
---|
| 1379 | bb_error_msg("warning: unrecognized proto= option");
|
---|
| 1380 | continue;
|
---|
| 1381 | case 20: // "addr" - ignore
|
---|
| 1382 | continue;
|
---|
[3232] | 1383 | case -1: // unknown
|
---|
| 1384 | if (vfsflags & MS_REMOUNT)
|
---|
| 1385 | continue;
|
---|
[2725] | 1386 | }
|
---|
| 1387 |
|
---|
| 1388 | val = xatoi_positive(opteq);
|
---|
| 1389 | switch (idx) {
|
---|
[1765] | 1390 | case 0: // "rsize"
|
---|
| 1391 | data.rsize = val;
|
---|
[2725] | 1392 | continue;
|
---|
[1765] | 1393 | case 1: // "wsize"
|
---|
| 1394 | data.wsize = val;
|
---|
[2725] | 1395 | continue;
|
---|
[1765] | 1396 | case 2: // "timeo"
|
---|
| 1397 | data.timeo = val;
|
---|
[2725] | 1398 | continue;
|
---|
[1765] | 1399 | case 3: // "retrans"
|
---|
| 1400 | data.retrans = val;
|
---|
[2725] | 1401 | continue;
|
---|
[1765] | 1402 | case 4: // "acregmin"
|
---|
| 1403 | data.acregmin = val;
|
---|
[2725] | 1404 | continue;
|
---|
[1765] | 1405 | case 5: // "acregmax"
|
---|
| 1406 | data.acregmax = val;
|
---|
[2725] | 1407 | continue;
|
---|
[1765] | 1408 | case 6: // "acdirmin"
|
---|
| 1409 | data.acdirmin = val;
|
---|
[2725] | 1410 | continue;
|
---|
[1765] | 1411 | case 7: // "acdirmax"
|
---|
| 1412 | data.acdirmax = val;
|
---|
[2725] | 1413 | continue;
|
---|
[1765] | 1414 | case 8: // "actimeo"
|
---|
| 1415 | data.acregmin = val;
|
---|
| 1416 | data.acregmax = val;
|
---|
| 1417 | data.acdirmin = val;
|
---|
| 1418 | data.acdirmax = val;
|
---|
[2725] | 1419 | continue;
|
---|
[1765] | 1420 | case 9: // "retry"
|
---|
| 1421 | retry = val;
|
---|
[2725] | 1422 | continue;
|
---|
[1765] | 1423 | case 10: // "port"
|
---|
| 1424 | port = val;
|
---|
[2725] | 1425 | continue;
|
---|
[1765] | 1426 | case 11: // "mountport"
|
---|
| 1427 | mountport = val;
|
---|
[2725] | 1428 | continue;
|
---|
[1765] | 1429 | case 13: // "mountprog"
|
---|
| 1430 | mountprog = val;
|
---|
[2725] | 1431 | continue;
|
---|
[1765] | 1432 | case 14: // "mountvers"
|
---|
| 1433 | mountvers = val;
|
---|
[2725] | 1434 | continue;
|
---|
[1765] | 1435 | case 15: // "nfsprog"
|
---|
| 1436 | nfsprog = val;
|
---|
[2725] | 1437 | continue;
|
---|
[1765] | 1438 | case 16: // "nfsvers"
|
---|
| 1439 | case 17: // "vers"
|
---|
| 1440 | nfsvers = val;
|
---|
[2725] | 1441 | continue;
|
---|
[1765] | 1442 | case 19: // "namlen"
|
---|
[2725] | 1443 | //if (nfs_mount_version >= 2)
|
---|
[1765] | 1444 | data.namlen = val;
|
---|
[2725] | 1445 | //else
|
---|
| 1446 | // bb_error_msg("warning: option namlen is not supported\n");
|
---|
| 1447 | continue;
|
---|
[1765] | 1448 | default:
|
---|
| 1449 | bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
|
---|
| 1450 | goto fail;
|
---|
| 1451 | }
|
---|
| 1452 | }
|
---|
[2725] | 1453 | else { /* not of the form opt=val */
|
---|
[1765] | 1454 | static const char options[] ALIGN1 =
|
---|
| 1455 | "bg\0"
|
---|
| 1456 | "fg\0"
|
---|
| 1457 | "soft\0"
|
---|
| 1458 | "hard\0"
|
---|
| 1459 | "intr\0"
|
---|
| 1460 | "posix\0"
|
---|
| 1461 | "cto\0"
|
---|
| 1462 | "ac\0"
|
---|
| 1463 | "tcp\0"
|
---|
| 1464 | "udp\0"
|
---|
[2725] | 1465 | "lock\0"
|
---|
[3232] | 1466 | "rdirplus\0"
|
---|
| 1467 | "acl\0";
|
---|
[1765] | 1468 | int val = 1;
|
---|
[3621] | 1469 | if (is_prefixed_with(opt, "no")) {
|
---|
[1765] | 1470 | val = 0;
|
---|
| 1471 | opt += 2;
|
---|
| 1472 | }
|
---|
| 1473 | switch (index_in_strings(options, opt)) {
|
---|
| 1474 | case 0: // "bg"
|
---|
[2725] | 1475 | #if BB_MMU
|
---|
[1765] | 1476 | bg = val;
|
---|
[2725] | 1477 | #endif
|
---|
[1765] | 1478 | break;
|
---|
| 1479 | case 1: // "fg"
|
---|
[2725] | 1480 | #if BB_MMU
|
---|
[1765] | 1481 | bg = !val;
|
---|
[2725] | 1482 | #endif
|
---|
[1765] | 1483 | break;
|
---|
| 1484 | case 2: // "soft"
|
---|
| 1485 | soft = val;
|
---|
| 1486 | break;
|
---|
| 1487 | case 3: // "hard"
|
---|
| 1488 | soft = !val;
|
---|
| 1489 | break;
|
---|
| 1490 | case 4: // "intr"
|
---|
| 1491 | intr = val;
|
---|
| 1492 | break;
|
---|
| 1493 | case 5: // "posix"
|
---|
| 1494 | posix = val;
|
---|
| 1495 | break;
|
---|
| 1496 | case 6: // "cto"
|
---|
| 1497 | nocto = !val;
|
---|
| 1498 | break;
|
---|
| 1499 | case 7: // "ac"
|
---|
| 1500 | noac = !val;
|
---|
| 1501 | break;
|
---|
| 1502 | case 8: // "tcp"
|
---|
| 1503 | tcp = val;
|
---|
| 1504 | break;
|
---|
| 1505 | case 9: // "udp"
|
---|
| 1506 | tcp = !val;
|
---|
| 1507 | break;
|
---|
| 1508 | case 10: // "lock"
|
---|
| 1509 | if (nfs_mount_version >= 3)
|
---|
| 1510 | nolock = !val;
|
---|
| 1511 | else
|
---|
| 1512 | bb_error_msg("warning: option nolock is not supported");
|
---|
| 1513 | break;
|
---|
[2725] | 1514 | case 11: //rdirplus
|
---|
| 1515 | nordirplus = !val;
|
---|
| 1516 | break;
|
---|
[3232] | 1517 | case 12: // acl
|
---|
| 1518 | noacl = !val;
|
---|
| 1519 | break;
|
---|
[1765] | 1520 | default:
|
---|
| 1521 | bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
|
---|
| 1522 | goto fail;
|
---|
| 1523 | }
|
---|
| 1524 | }
|
---|
| 1525 | }
|
---|
| 1526 | proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
|
---|
| 1527 |
|
---|
| 1528 | data.flags = (soft ? NFS_MOUNT_SOFT : 0)
|
---|
| 1529 | | (intr ? NFS_MOUNT_INTR : 0)
|
---|
| 1530 | | (posix ? NFS_MOUNT_POSIX : 0)
|
---|
| 1531 | | (nocto ? NFS_MOUNT_NOCTO : 0)
|
---|
[2725] | 1532 | | (noac ? NFS_MOUNT_NOAC : 0)
|
---|
[3232] | 1533 | | (nordirplus ? NFS_MOUNT_NORDIRPLUS : 0)
|
---|
| 1534 | | (noacl ? NFS_MOUNT_NOACL : 0);
|
---|
[1765] | 1535 | if (nfs_mount_version >= 2)
|
---|
| 1536 | data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
|
---|
| 1537 | if (nfs_mount_version >= 3)
|
---|
| 1538 | data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
|
---|
| 1539 | if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
|
---|
| 1540 | bb_error_msg("NFSv%d not supported", nfsvers);
|
---|
| 1541 | goto fail;
|
---|
| 1542 | }
|
---|
| 1543 | if (nfsvers && !mountvers)
|
---|
| 1544 | mountvers = (nfsvers < 3) ? 1 : nfsvers;
|
---|
| 1545 | if (nfsvers && nfsvers < mountvers) {
|
---|
| 1546 | mountvers = nfsvers;
|
---|
| 1547 | }
|
---|
| 1548 |
|
---|
| 1549 | /* Adjust options if none specified */
|
---|
| 1550 | if (!data.timeo)
|
---|
| 1551 | data.timeo = tcp ? 70 : 7;
|
---|
| 1552 |
|
---|
| 1553 | data.version = nfs_mount_version;
|
---|
| 1554 |
|
---|
| 1555 | if (vfsflags & MS_REMOUNT)
|
---|
| 1556 | goto do_mount;
|
---|
| 1557 |
|
---|
| 1558 | /*
|
---|
| 1559 | * If the previous mount operation on the same host was
|
---|
| 1560 | * backgrounded, and the "bg" for this mount is also set,
|
---|
| 1561 | * give up immediately, to avoid the initial timeout.
|
---|
| 1562 | */
|
---|
| 1563 | if (bg && we_saw_this_host_before(hostname)) {
|
---|
[2725] | 1564 | daemonized = daemonize();
|
---|
[1765] | 1565 | if (daemonized <= 0) { /* parent or error */
|
---|
| 1566 | retval = -daemonized;
|
---|
| 1567 | goto ret;
|
---|
| 1568 | }
|
---|
| 1569 | }
|
---|
| 1570 |
|
---|
[2725] | 1571 | /* Create mount daemon client */
|
---|
[1765] | 1572 | /* See if the nfs host = mount host. */
|
---|
| 1573 | if (mounthost) {
|
---|
| 1574 | if (mounthost[0] >= '0' && mounthost[0] <= '9') {
|
---|
| 1575 | mount_server_addr.sin_family = AF_INET;
|
---|
| 1576 | mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
|
---|
| 1577 | } else {
|
---|
| 1578 | hp = gethostbyname(mounthost);
|
---|
| 1579 | if (hp == NULL) {
|
---|
| 1580 | bb_herror_msg("%s", mounthost);
|
---|
| 1581 | goto fail;
|
---|
| 1582 | }
|
---|
[2725] | 1583 | if (hp->h_length != (int)sizeof(struct in_addr)) {
|
---|
| 1584 | bb_error_msg_and_die("only IPv4 is supported");
|
---|
| 1585 | }
|
---|
| 1586 | mount_server_addr.sin_family = AF_INET;
|
---|
| 1587 | memcpy(&mount_server_addr.sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
|
---|
[1765] | 1588 | }
|
---|
| 1589 | }
|
---|
| 1590 |
|
---|
| 1591 | /*
|
---|
| 1592 | * The following loop implements the mount retries. When the mount
|
---|
| 1593 | * times out, and the "bg" option is set, we background ourself
|
---|
| 1594 | * and continue trying.
|
---|
| 1595 | *
|
---|
| 1596 | * The case where the mount point is not present and the "bg"
|
---|
| 1597 | * option is set, is treated as a timeout. This is done to
|
---|
| 1598 | * support nested mounts.
|
---|
| 1599 | *
|
---|
| 1600 | * The "retry" count specified by the user is the number of
|
---|
| 1601 | * minutes to retry before giving up.
|
---|
| 1602 | */
|
---|
| 1603 | {
|
---|
| 1604 | struct timeval total_timeout;
|
---|
| 1605 | struct timeval retry_timeout;
|
---|
[2725] | 1606 | struct pmap pm_mnt;
|
---|
[1765] | 1607 | time_t t;
|
---|
| 1608 | time_t prevt;
|
---|
| 1609 | time_t timeout;
|
---|
| 1610 |
|
---|
| 1611 | retry_timeout.tv_sec = 3;
|
---|
| 1612 | retry_timeout.tv_usec = 0;
|
---|
| 1613 | total_timeout.tv_sec = 20;
|
---|
| 1614 | total_timeout.tv_usec = 0;
|
---|
[2725] | 1615 | /* FIXME: use monotonic()? */
|
---|
[1765] | 1616 | timeout = time(NULL) + 60 * retry;
|
---|
| 1617 | prevt = 0;
|
---|
| 1618 | t = 30;
|
---|
[2725] | 1619 | retry:
|
---|
| 1620 | /* Be careful not to use too many CPU cycles */
|
---|
[1765] | 1621 | if (t - prevt < 30)
|
---|
| 1622 | sleep(30);
|
---|
| 1623 |
|
---|
[2725] | 1624 | get_mountport(&pm_mnt, &mount_server_addr,
|
---|
[1765] | 1625 | mountprog,
|
---|
| 1626 | mountvers,
|
---|
| 1627 | proto,
|
---|
| 1628 | mountport);
|
---|
[2725] | 1629 | nfsvers = (pm_mnt.pm_vers < 2) ? 2 : pm_mnt.pm_vers;
|
---|
[1765] | 1630 |
|
---|
| 1631 | /* contact the mount daemon via TCP */
|
---|
[2725] | 1632 | mount_server_addr.sin_port = htons(pm_mnt.pm_port);
|
---|
[1765] | 1633 | msock = RPC_ANYSOCK;
|
---|
| 1634 |
|
---|
[2725] | 1635 | switch (pm_mnt.pm_prot) {
|
---|
[1765] | 1636 | case IPPROTO_UDP:
|
---|
| 1637 | mclient = clntudp_create(&mount_server_addr,
|
---|
[3232] | 1638 | pm_mnt.pm_prog,
|
---|
| 1639 | pm_mnt.pm_vers,
|
---|
| 1640 | retry_timeout,
|
---|
| 1641 | &msock);
|
---|
[1765] | 1642 | if (mclient)
|
---|
| 1643 | break;
|
---|
[2725] | 1644 | mount_server_addr.sin_port = htons(pm_mnt.pm_port);
|
---|
[1765] | 1645 | msock = RPC_ANYSOCK;
|
---|
| 1646 | case IPPROTO_TCP:
|
---|
| 1647 | mclient = clnttcp_create(&mount_server_addr,
|
---|
[3232] | 1648 | pm_mnt.pm_prog,
|
---|
| 1649 | pm_mnt.pm_vers,
|
---|
| 1650 | &msock, 0, 0);
|
---|
[1765] | 1651 | break;
|
---|
| 1652 | default:
|
---|
[2725] | 1653 | mclient = NULL;
|
---|
[1765] | 1654 | }
|
---|
| 1655 | if (!mclient) {
|
---|
| 1656 | if (!daemonized && prevt == 0)
|
---|
| 1657 | error_msg_rpc(clnt_spcreateerror(" "));
|
---|
| 1658 | } else {
|
---|
| 1659 | enum clnt_stat clnt_stat;
|
---|
[2725] | 1660 |
|
---|
| 1661 | /* Try to mount hostname:pathname */
|
---|
[1765] | 1662 | mclient->cl_auth = authunix_create_default();
|
---|
| 1663 |
|
---|
[2725] | 1664 | /* Make pointers in xdr_mountres3 NULL so
|
---|
[1765] | 1665 | * that xdr_array allocates memory for us
|
---|
| 1666 | */
|
---|
| 1667 | memset(&status, 0, sizeof(status));
|
---|
| 1668 |
|
---|
[2725] | 1669 | if (pm_mnt.pm_vers == 3)
|
---|
[1765] | 1670 | clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
|
---|
[3232] | 1671 | (xdrproc_t) xdr_dirpath,
|
---|
| 1672 | (caddr_t) &pathname,
|
---|
| 1673 | (xdrproc_t) xdr_mountres3,
|
---|
| 1674 | (caddr_t) &status,
|
---|
| 1675 | total_timeout);
|
---|
[1765] | 1676 | else
|
---|
| 1677 | clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
|
---|
[3232] | 1678 | (xdrproc_t) xdr_dirpath,
|
---|
| 1679 | (caddr_t) &pathname,
|
---|
| 1680 | (xdrproc_t) xdr_fhstatus,
|
---|
| 1681 | (caddr_t) &status,
|
---|
| 1682 | total_timeout);
|
---|
[1765] | 1683 |
|
---|
| 1684 | if (clnt_stat == RPC_SUCCESS)
|
---|
| 1685 | goto prepare_kernel_data; /* we're done */
|
---|
| 1686 | if (errno != ECONNREFUSED) {
|
---|
| 1687 | error_msg_rpc(clnt_sperror(mclient, " "));
|
---|
| 1688 | goto fail; /* don't retry */
|
---|
| 1689 | }
|
---|
| 1690 | /* Connection refused */
|
---|
| 1691 | if (!daemonized && prevt == 0) /* print just once */
|
---|
| 1692 | error_msg_rpc(clnt_sperror(mclient, " "));
|
---|
| 1693 | auth_destroy(mclient->cl_auth);
|
---|
| 1694 | clnt_destroy(mclient);
|
---|
[2725] | 1695 | mclient = NULL;
|
---|
[1765] | 1696 | close(msock);
|
---|
[2725] | 1697 | msock = -1;
|
---|
[1765] | 1698 | }
|
---|
| 1699 |
|
---|
| 1700 | /* Timeout. We are going to retry... maybe */
|
---|
| 1701 | if (!bg)
|
---|
| 1702 | goto fail;
|
---|
| 1703 | if (!daemonized) {
|
---|
| 1704 | daemonized = daemonize();
|
---|
| 1705 | if (daemonized <= 0) { /* parent or error */
|
---|
| 1706 | retval = -daemonized;
|
---|
| 1707 | goto ret;
|
---|
| 1708 | }
|
---|
| 1709 | }
|
---|
| 1710 | prevt = t;
|
---|
| 1711 | t = time(NULL);
|
---|
| 1712 | if (t >= timeout)
|
---|
| 1713 | /* TODO error message */
|
---|
| 1714 | goto fail;
|
---|
| 1715 |
|
---|
| 1716 | goto retry;
|
---|
| 1717 | }
|
---|
| 1718 |
|
---|
[2725] | 1719 | prepare_kernel_data:
|
---|
[1765] | 1720 |
|
---|
| 1721 | if (nfsvers == 2) {
|
---|
| 1722 | if (status.nfsv2.fhs_status != 0) {
|
---|
| 1723 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
| 1724 | hostname, pathname,
|
---|
| 1725 | nfs_strerror(status.nfsv2.fhs_status));
|
---|
| 1726 | goto fail;
|
---|
| 1727 | }
|
---|
| 1728 | memcpy(data.root.data,
|
---|
| 1729 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
| 1730 | NFS_FHSIZE);
|
---|
| 1731 | data.root.size = NFS_FHSIZE;
|
---|
| 1732 | memcpy(data.old_root.data,
|
---|
| 1733 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
| 1734 | NFS_FHSIZE);
|
---|
| 1735 | } else {
|
---|
| 1736 | fhandle3 *my_fhandle;
|
---|
| 1737 | if (status.nfsv3.fhs_status != 0) {
|
---|
| 1738 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
| 1739 | hostname, pathname,
|
---|
| 1740 | nfs_strerror(status.nfsv3.fhs_status));
|
---|
| 1741 | goto fail;
|
---|
| 1742 | }
|
---|
| 1743 | my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
|
---|
| 1744 | memset(data.old_root.data, 0, NFS_FHSIZE);
|
---|
| 1745 | memset(&data.root, 0, sizeof(data.root));
|
---|
| 1746 | data.root.size = my_fhandle->fhandle3_len;
|
---|
| 1747 | memcpy(data.root.data,
|
---|
| 1748 | (char *) my_fhandle->fhandle3_val,
|
---|
| 1749 | my_fhandle->fhandle3_len);
|
---|
| 1750 |
|
---|
| 1751 | data.flags |= NFS_MOUNT_VER3;
|
---|
| 1752 | }
|
---|
| 1753 |
|
---|
[2725] | 1754 | /* Create nfs socket for kernel */
|
---|
[1765] | 1755 | if (tcp) {
|
---|
| 1756 | if (nfs_mount_version < 3) {
|
---|
| 1757 | bb_error_msg("NFS over TCP is not supported");
|
---|
| 1758 | goto fail;
|
---|
| 1759 | }
|
---|
| 1760 | fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
---|
| 1761 | } else
|
---|
| 1762 | fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
---|
| 1763 | if (fsock < 0) {
|
---|
| 1764 | bb_perror_msg("nfs socket");
|
---|
| 1765 | goto fail;
|
---|
| 1766 | }
|
---|
| 1767 | if (bindresvport(fsock, 0) < 0) {
|
---|
| 1768 | bb_perror_msg("nfs bindresvport");
|
---|
| 1769 | goto fail;
|
---|
| 1770 | }
|
---|
| 1771 | if (port == 0) {
|
---|
| 1772 | server_addr.sin_port = PMAPPORT;
|
---|
| 1773 | port = pmap_getport(&server_addr, nfsprog, nfsvers,
|
---|
| 1774 | tcp ? IPPROTO_TCP : IPPROTO_UDP);
|
---|
| 1775 | if (port == 0)
|
---|
| 1776 | port = NFS_PORT;
|
---|
| 1777 | }
|
---|
| 1778 | server_addr.sin_port = htons(port);
|
---|
| 1779 |
|
---|
[2725] | 1780 | /* Prepare data structure for kernel */
|
---|
[1765] | 1781 | data.fd = fsock;
|
---|
| 1782 | memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
|
---|
| 1783 | strncpy(data.hostname, hostname, sizeof(data.hostname));
|
---|
| 1784 |
|
---|
[2725] | 1785 | /* Clean up */
|
---|
[1765] | 1786 | auth_destroy(mclient->cl_auth);
|
---|
| 1787 | clnt_destroy(mclient);
|
---|
| 1788 | close(msock);
|
---|
[2725] | 1789 | msock = -1;
|
---|
[1765] | 1790 |
|
---|
| 1791 | if (bg) {
|
---|
| 1792 | /* We must wait until mount directory is available */
|
---|
| 1793 | struct stat statbuf;
|
---|
| 1794 | int delay = 1;
|
---|
| 1795 | while (stat(mp->mnt_dir, &statbuf) == -1) {
|
---|
| 1796 | if (!daemonized) {
|
---|
| 1797 | daemonized = daemonize();
|
---|
| 1798 | if (daemonized <= 0) { /* parent or error */
|
---|
[2725] | 1799 | /* FIXME: parent doesn't close fsock - ??! */
|
---|
[1765] | 1800 | retval = -daemonized;
|
---|
| 1801 | goto ret;
|
---|
| 1802 | }
|
---|
| 1803 | }
|
---|
| 1804 | sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
|
---|
| 1805 | delay *= 2;
|
---|
| 1806 | if (delay > 30)
|
---|
| 1807 | delay = 30;
|
---|
| 1808 | }
|
---|
| 1809 | }
|
---|
| 1810 |
|
---|
[2725] | 1811 | /* Perform actual mount */
|
---|
| 1812 | do_mount:
|
---|
[1765] | 1813 | retval = mount_it_now(mp, vfsflags, (char*)&data);
|
---|
| 1814 | goto ret;
|
---|
| 1815 |
|
---|
[2725] | 1816 | /* Abort */
|
---|
| 1817 | fail:
|
---|
| 1818 | if (msock >= 0) {
|
---|
[1765] | 1819 | if (mclient) {
|
---|
| 1820 | auth_destroy(mclient->cl_auth);
|
---|
| 1821 | clnt_destroy(mclient);
|
---|
| 1822 | }
|
---|
| 1823 | close(msock);
|
---|
| 1824 | }
|
---|
[2725] | 1825 | if (fsock >= 0)
|
---|
[1765] | 1826 | close(fsock);
|
---|
| 1827 |
|
---|
[2725] | 1828 | ret:
|
---|
[1765] | 1829 | free(hostname);
|
---|
| 1830 | free(mounthost);
|
---|
| 1831 | free(filteropts);
|
---|
| 1832 | return retval;
|
---|
| 1833 | }
|
---|
| 1834 |
|
---|
[2725] | 1835 | #else // !ENABLE_FEATURE_MOUNT_NFS
|
---|
[1765] | 1836 |
|
---|
[3232] | 1837 | /* Linux 2.6.23+ supports nfs mounts with options passed as a string.
|
---|
| 1838 | * For older kernels, you must build busybox with ENABLE_FEATURE_MOUNT_NFS.
|
---|
| 1839 | * (However, note that then you lose any chances that NFS over IPv6 would work).
|
---|
| 1840 | */
|
---|
| 1841 | static int nfsmount(struct mntent *mp, unsigned long vfsflags, char *filteropts)
|
---|
| 1842 | {
|
---|
| 1843 | len_and_sockaddr *lsa;
|
---|
| 1844 | char *opts;
|
---|
| 1845 | char *end;
|
---|
| 1846 | char *dotted;
|
---|
| 1847 | int ret;
|
---|
[1765] | 1848 |
|
---|
[3232] | 1849 | # if ENABLE_FEATURE_IPV6
|
---|
| 1850 | end = strchr(mp->mnt_fsname, ']');
|
---|
| 1851 | if (end && end[1] == ':')
|
---|
| 1852 | end++;
|
---|
| 1853 | else
|
---|
| 1854 | # endif
|
---|
| 1855 | /* mount_main() guarantees that ':' is there */
|
---|
| 1856 | end = strchr(mp->mnt_fsname, ':');
|
---|
| 1857 |
|
---|
| 1858 | *end = '\0';
|
---|
| 1859 | lsa = xhost2sockaddr(mp->mnt_fsname, /*port:*/ 0);
|
---|
| 1860 | *end = ':';
|
---|
| 1861 | dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
|
---|
| 1862 | if (ENABLE_FEATURE_CLEAN_UP) free(lsa);
|
---|
| 1863 | opts = xasprintf("%s%saddr=%s",
|
---|
| 1864 | filteropts ? filteropts : "",
|
---|
| 1865 | filteropts ? "," : "",
|
---|
| 1866 | dotted
|
---|
| 1867 | );
|
---|
| 1868 | if (ENABLE_FEATURE_CLEAN_UP) free(dotted);
|
---|
| 1869 | ret = mount_it_now(mp, vfsflags, opts);
|
---|
| 1870 | if (ENABLE_FEATURE_CLEAN_UP) free(opts);
|
---|
| 1871 |
|
---|
| 1872 | return ret;
|
---|
| 1873 | }
|
---|
| 1874 |
|
---|
[2725] | 1875 | #endif // !ENABLE_FEATURE_MOUNT_NFS
|
---|
[1765] | 1876 |
|
---|
| 1877 | // Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
|
---|
| 1878 | // type detection. Returns 0 for success, nonzero for failure.
|
---|
| 1879 | // NB: mp->xxx fields may be trashed on exit
|
---|
[821] | 1880 | static int singlemount(struct mntent *mp, int ignore_busy)
|
---|
| 1881 | {
|
---|
[2725] | 1882 | int rc = -1;
|
---|
[3232] | 1883 | unsigned long vfsflags;
|
---|
[2725] | 1884 | char *loopFile = NULL, *filteropts = NULL;
|
---|
| 1885 | llist_t *fl = NULL;
|
---|
[821] | 1886 | struct stat st;
|
---|
| 1887 |
|
---|
[2725] | 1888 | errno = 0;
|
---|
| 1889 |
|
---|
[821] | 1890 | vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
|
---|
| 1891 |
|
---|
[2725] | 1892 | // Treat fstype "auto" as unspecified
|
---|
| 1893 | if (mp->mnt_type && strcmp(mp->mnt_type, "auto") == 0)
|
---|
| 1894 | mp->mnt_type = NULL;
|
---|
[821] | 1895 |
|
---|
[2725] | 1896 | // Might this be a virtual filesystem?
|
---|
| 1897 | if (ENABLE_FEATURE_MOUNT_HELPERS && strchr(mp->mnt_fsname, '#')) {
|
---|
| 1898 | char *args[35];
|
---|
| 1899 | char *s;
|
---|
| 1900 | int n;
|
---|
| 1901 | // fsname: "cmd#arg1#arg2..."
|
---|
| 1902 | // WARNING: allows execution of arbitrary commands!
|
---|
| 1903 | // Try "mount 'sh#-c#sh' bogus_dir".
|
---|
| 1904 | // It is safe ONLY because non-root
|
---|
| 1905 | // cannot use two-argument mount command
|
---|
| 1906 | // and using one-argument "mount 'sh#-c#sh'" doesn't work:
|
---|
| 1907 | // "mount: can't find sh#-c#sh in /etc/fstab"
|
---|
| 1908 | // (if /etc/fstab has it, it's ok: root sets up /etc/fstab).
|
---|
[821] | 1909 |
|
---|
[2725] | 1910 | s = mp->mnt_fsname;
|
---|
| 1911 | n = 0;
|
---|
| 1912 | args[n++] = s;
|
---|
| 1913 | while (*s && n < 35 - 2) {
|
---|
| 1914 | if (*s++ == '#' && *s != '#') {
|
---|
| 1915 | s[-1] = '\0';
|
---|
| 1916 | args[n++] = s;
|
---|
| 1917 | }
|
---|
| 1918 | }
|
---|
| 1919 | args[n++] = mp->mnt_dir;
|
---|
| 1920 | args[n] = NULL;
|
---|
| 1921 | rc = spawn_and_wait(args);
|
---|
| 1922 | goto report_error;
|
---|
| 1923 | }
|
---|
| 1924 |
|
---|
[1765] | 1925 | // Might this be an CIFS filesystem?
|
---|
| 1926 | if (ENABLE_FEATURE_MOUNT_CIFS
|
---|
[2725] | 1927 | && (!mp->mnt_type || strcmp(mp->mnt_type, "cifs") == 0)
|
---|
| 1928 | && (mp->mnt_fsname[0] == '/' || mp->mnt_fsname[0] == '\\')
|
---|
| 1929 | && mp->mnt_fsname[0] == mp->mnt_fsname[1]
|
---|
[1765] | 1930 | ) {
|
---|
[2725] | 1931 | int len;
|
---|
| 1932 | char c;
|
---|
[3232] | 1933 | char *hostname, *share;
|
---|
| 1934 | char *dotted, *ip;
|
---|
[1765] | 1935 | len_and_sockaddr *lsa;
|
---|
| 1936 |
|
---|
[3232] | 1937 | // Parse mp->mnt_fsname of the form "//hostname/share[/dir1/dir2]"
|
---|
| 1938 |
|
---|
[2725] | 1939 | hostname = mp->mnt_fsname + 2;
|
---|
| 1940 | len = strcspn(hostname, "/\\");
|
---|
[3232] | 1941 | share = hostname + len + 1;
|
---|
| 1942 | if (len == 0 // 3rd char is a [back]slash (IOW: empty hostname)
|
---|
| 1943 | || share[-1] == '\0' // no [back]slash after hostname
|
---|
| 1944 | || share[0] == '\0' // empty share name
|
---|
| 1945 | ) {
|
---|
[2725] | 1946 | goto report_error;
|
---|
[3232] | 1947 | }
|
---|
| 1948 | c = share[-1];
|
---|
| 1949 | share[-1] = '\0';
|
---|
| 1950 | len = strcspn(share, "/\\");
|
---|
| 1951 |
|
---|
| 1952 | // "unc=\\hostname\share" option is mandatory
|
---|
| 1953 | // after CIFS option parsing was rewritten in Linux 3.4.
|
---|
| 1954 | // Must use backslashes.
|
---|
| 1955 | // If /dir1/dir2 is present, also add "prefixpath=dir1/dir2"
|
---|
| 1956 | {
|
---|
| 1957 | char *unc = xasprintf(
|
---|
| 1958 | share[len] != '\0' /* "/dir1/dir2" exists? */
|
---|
| 1959 | ? "unc=\\\\%s\\%.*s,prefixpath=%s"
|
---|
| 1960 | : "unc=\\\\%s\\%.*s",
|
---|
| 1961 | hostname,
|
---|
| 1962 | len, share,
|
---|
| 1963 | share + len + 1 /* "dir1/dir2" */
|
---|
| 1964 | );
|
---|
[3621] | 1965 | parse_mount_options(unc, &filteropts);
|
---|
| 1966 | if (ENABLE_FEATURE_CLEAN_UP) free(unc);
|
---|
[3232] | 1967 | }
|
---|
| 1968 |
|
---|
[2725] | 1969 | lsa = host2sockaddr(hostname, 0);
|
---|
[3232] | 1970 | share[-1] = c;
|
---|
[2725] | 1971 | if (!lsa)
|
---|
| 1972 | goto report_error;
|
---|
[1765] | 1973 |
|
---|
[2725] | 1974 | // Insert "ip=..." option into options
|
---|
| 1975 | dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
|
---|
| 1976 | if (ENABLE_FEATURE_CLEAN_UP) free(lsa);
|
---|
[1765] | 1977 | ip = xasprintf("ip=%s", dotted);
|
---|
[2725] | 1978 | if (ENABLE_FEATURE_CLEAN_UP) free(dotted);
|
---|
[1765] | 1979 | parse_mount_options(ip, &filteropts);
|
---|
[2725] | 1980 | if (ENABLE_FEATURE_CLEAN_UP) free(ip);
|
---|
[1765] | 1981 |
|
---|
| 1982 | mp->mnt_type = (char*)"cifs";
|
---|
| 1983 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
[2725] | 1984 |
|
---|
[1765] | 1985 | goto report_error;
|
---|
[821] | 1986 | }
|
---|
| 1987 |
|
---|
[1765] | 1988 | // Might this be an NFS filesystem?
|
---|
[3621] | 1989 | if ((!mp->mnt_type || is_prefixed_with(mp->mnt_type, "nfs"))
|
---|
[1765] | 1990 | && strchr(mp->mnt_fsname, ':') != NULL
|
---|
| 1991 | ) {
|
---|
[3232] | 1992 | if (!mp->mnt_type)
|
---|
| 1993 | mp->mnt_type = (char*)"nfs";
|
---|
[1765] | 1994 | rc = nfsmount(mp, vfsflags, filteropts);
|
---|
| 1995 | goto report_error;
|
---|
| 1996 | }
|
---|
| 1997 |
|
---|
[821] | 1998 | // Look at the file. (Not found isn't a failure for remount, or for
|
---|
| 1999 | // a synthetic filesystem like proc or sysfs.)
|
---|
[1765] | 2000 | // (We use stat, not lstat, in order to allow
|
---|
| 2001 | // mount symlink_to_file_or_blkdev dir)
|
---|
| 2002 | if (!stat(mp->mnt_fsname, &st)
|
---|
| 2003 | && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
|
---|
| 2004 | ) {
|
---|
[821] | 2005 | // Do we need to allocate a loopback device for it?
|
---|
| 2006 | if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
|
---|
| 2007 | loopFile = bb_simplify_path(mp->mnt_fsname);
|
---|
[2725] | 2008 | mp->mnt_fsname = NULL; // will receive malloced loop dev name
|
---|
[3232] | 2009 | if (set_loop(&mp->mnt_fsname, loopFile, 0, /*ro:*/ (vfsflags & MS_RDONLY)) < 0) {
|
---|
[1765] | 2010 | if (errno == EPERM || errno == EACCES)
|
---|
| 2011 | bb_error_msg(bb_msg_perm_denied_are_you_root);
|
---|
| 2012 | else
|
---|
[2725] | 2013 | bb_perror_msg("can't setup loop device");
|
---|
[1765] | 2014 | return errno;
|
---|
[821] | 2015 | }
|
---|
| 2016 |
|
---|
| 2017 | // Autodetect bind mounts
|
---|
[1765] | 2018 | } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
|
---|
| 2019 | vfsflags |= MS_BIND;
|
---|
[821] | 2020 | }
|
---|
| 2021 |
|
---|
[2725] | 2022 | // If we know the fstype (or don't need to), jump straight
|
---|
| 2023 | // to the actual mount.
|
---|
| 2024 | if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))) {
|
---|
[3232] | 2025 | char *next;
|
---|
| 2026 | for (;;) {
|
---|
| 2027 | next = mp->mnt_type ? strchr(mp->mnt_type, ',') : NULL;
|
---|
| 2028 | if (next)
|
---|
| 2029 | *next = '\0';
|
---|
| 2030 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
| 2031 | if (rc == 0 || !next)
|
---|
| 2032 | break;
|
---|
| 2033 | mp->mnt_type = next + 1;
|
---|
| 2034 | }
|
---|
[2725] | 2035 | } else {
|
---|
[1765] | 2036 | // Loop through filesystem types until mount succeeds
|
---|
| 2037 | // or we run out
|
---|
[821] | 2038 |
|
---|
[2725] | 2039 | // Initialize list of block backed filesystems.
|
---|
| 2040 | // This has to be done here so that during "mount -a",
|
---|
| 2041 | // mounts after /proc shows up can autodetect.
|
---|
[821] | 2042 | if (!fslist) {
|
---|
| 2043 | fslist = get_block_backed_filesystems();
|
---|
| 2044 | if (ENABLE_FEATURE_CLEAN_UP && fslist)
|
---|
| 2045 | atexit(delete_block_backed_filesystems);
|
---|
| 2046 | }
|
---|
| 2047 |
|
---|
| 2048 | for (fl = fslist; fl; fl = fl->link) {
|
---|
| 2049 | mp->mnt_type = fl->data;
|
---|
[1765] | 2050 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
[3232] | 2051 | if (rc == 0)
|
---|
[2725] | 2052 | break;
|
---|
[821] | 2053 | }
|
---|
| 2054 | }
|
---|
| 2055 |
|
---|
| 2056 | // If mount failed, clean up loop file (if any).
|
---|
| 2057 | if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
|
---|
| 2058 | del_loop(mp->mnt_fsname);
|
---|
| 2059 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 2060 | free(loopFile);
|
---|
[3621] | 2061 | /* No, "rc != 0" needs it: free(mp->mnt_fsname); */
|
---|
[821] | 2062 | }
|
---|
| 2063 | }
|
---|
[1765] | 2064 |
|
---|
| 2065 | report_error:
|
---|
| 2066 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 2067 | free(filteropts);
|
---|
| 2068 |
|
---|
[2725] | 2069 | if (errno == EBUSY && ignore_busy)
|
---|
| 2070 | return 0;
|
---|
[3621] | 2071 | if (errno == ENOENT && (vfsflags & MOUNT_NOFAIL))
|
---|
| 2072 | return 0;
|
---|
[2725] | 2073 | if (rc != 0)
|
---|
[1765] | 2074 | bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
|
---|
[821] | 2075 | return rc;
|
---|
| 2076 | }
|
---|
| 2077 |
|
---|
[2725] | 2078 | // -O support
|
---|
| 2079 | // -O interprets a list of filter options which select whether a mount
|
---|
| 2080 | // point will be mounted: only mounts with options matching *all* filtering
|
---|
| 2081 | // options will be selected.
|
---|
| 2082 | // By default each -O filter option must be present in the list of mount
|
---|
| 2083 | // options, but if it is prefixed by "no" then it must be absent.
|
---|
| 2084 | // For example,
|
---|
| 2085 | // -O a,nob,c matches -o a,c but fails to match -o a,b,c
|
---|
| 2086 | // (and also fails to match -o a because -o c is absent).
|
---|
| 2087 | //
|
---|
| 2088 | // It is different from -t in that each option is matched exactly; a leading
|
---|
| 2089 | // "no" at the beginning of one option does not negate the rest.
|
---|
| 2090 | static int match_opt(const char *fs_opt_in, const char *O_opt)
|
---|
| 2091 | {
|
---|
| 2092 | if (!O_opt)
|
---|
| 2093 | return 1;
|
---|
| 2094 |
|
---|
| 2095 | while (*O_opt) {
|
---|
| 2096 | const char *fs_opt = fs_opt_in;
|
---|
| 2097 | int O_len;
|
---|
| 2098 | int match;
|
---|
| 2099 |
|
---|
| 2100 | // If option begins with "no" then treat as an inverted match:
|
---|
| 2101 | // matching is a failure
|
---|
| 2102 | match = 0;
|
---|
| 2103 | if (O_opt[0] == 'n' && O_opt[1] == 'o') {
|
---|
| 2104 | match = 1;
|
---|
| 2105 | O_opt += 2;
|
---|
| 2106 | }
|
---|
| 2107 | // Isolate the current O option
|
---|
| 2108 | O_len = strchrnul(O_opt, ',') - O_opt;
|
---|
| 2109 | // Check for a match against existing options
|
---|
| 2110 | while (1) {
|
---|
| 2111 | if (strncmp(fs_opt, O_opt, O_len) == 0
|
---|
| 2112 | && (fs_opt[O_len] == '\0' || fs_opt[O_len] == ',')
|
---|
| 2113 | ) {
|
---|
| 2114 | if (match)
|
---|
| 2115 | return 0; // "no" prefix, but option found
|
---|
| 2116 | match = 1; // current O option found, go check next one
|
---|
| 2117 | break;
|
---|
| 2118 | }
|
---|
| 2119 | fs_opt = strchr(fs_opt, ',');
|
---|
| 2120 | if (!fs_opt)
|
---|
| 2121 | break;
|
---|
| 2122 | fs_opt++;
|
---|
| 2123 | }
|
---|
| 2124 | if (match == 0)
|
---|
| 2125 | return 0; // match wanted but not found
|
---|
| 2126 | if (O_opt[O_len] == '\0') // end?
|
---|
| 2127 | break;
|
---|
| 2128 | // Step to the next O option
|
---|
| 2129 | O_opt += O_len + 1;
|
---|
| 2130 | }
|
---|
| 2131 | // If we get here then everything matched
|
---|
| 2132 | return 1;
|
---|
| 2133 | }
|
---|
| 2134 |
|
---|
[821] | 2135 | // Parse options, if necessary parse fstab/mtab, and call singlemount for
|
---|
| 2136 | // each directory to be mounted.
|
---|
[2725] | 2137 | int mount_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 2138 | int mount_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 2139 | {
|
---|
[2725] | 2140 | char *cmdopts = xzalloc(1);
|
---|
| 2141 | char *fstype = NULL;
|
---|
| 2142 | char *O_optmatch = NULL;
|
---|
| 2143 | char *storage_path;
|
---|
| 2144 | llist_t *lst_o = NULL;
|
---|
[3621] | 2145 | const char *fstabname = "/etc/fstab";
|
---|
[821] | 2146 | FILE *fstab;
|
---|
[2725] | 2147 | int i, j;
|
---|
| 2148 | int rc = EXIT_SUCCESS;
|
---|
[3232] | 2149 | unsigned long cmdopt_flags;
|
---|
[1765] | 2150 | unsigned opt;
|
---|
[821] | 2151 | struct mntent mtpair[2], *mtcur = mtpair;
|
---|
[2725] | 2152 | IF_NOT_DESKTOP(const int nonroot = 0;)
|
---|
[821] | 2153 |
|
---|
[2725] | 2154 | IF_DESKTOP(int nonroot = ) sanitize_env_if_suid();
|
---|
[821] | 2155 |
|
---|
[3232] | 2156 | INIT_G();
|
---|
| 2157 |
|
---|
[2725] | 2158 | // Parse long options, like --bind and --move. Note that -o option
|
---|
| 2159 | // and --option are synonymous. Yes, this means --remount,rw works.
|
---|
| 2160 | for (i = j = 1; argv[i]; i++) {
|
---|
| 2161 | if (argv[i][0] == '-' && argv[i][1] == '-')
|
---|
| 2162 | append_mount_options(&cmdopts, argv[i] + 2);
|
---|
| 2163 | else
|
---|
| 2164 | argv[j++] = argv[i];
|
---|
[821] | 2165 | }
|
---|
[2725] | 2166 | argv[j] = NULL;
|
---|
[821] | 2167 |
|
---|
| 2168 | // Parse remaining options
|
---|
[2725] | 2169 | // Max 2 params; -o is a list, -v is a counter
|
---|
| 2170 | opt_complementary = "?2o::" IF_FEATURE_MOUNT_VERBOSE("vv");
|
---|
| 2171 | opt = getopt32(argv, OPTION_STR, &lst_o, &fstype, &O_optmatch
|
---|
[3621] | 2172 | IF_FEATURE_MOUNT_OTHERTAB(, &fstabname)
|
---|
[2725] | 2173 | IF_FEATURE_MOUNT_VERBOSE(, &verbose));
|
---|
| 2174 | while (lst_o) append_mount_options(&cmdopts, llist_pop(&lst_o)); // -o
|
---|
| 2175 | if (opt & OPT_r) append_mount_options(&cmdopts, "ro"); // -r
|
---|
| 2176 | if (opt & OPT_w) append_mount_options(&cmdopts, "rw"); // -w
|
---|
[1765] | 2177 | argv += optind;
|
---|
[821] | 2178 |
|
---|
| 2179 | // If we have no arguments, show currently mounted filesystems
|
---|
[2725] | 2180 | if (!argv[0]) {
|
---|
| 2181 | if (!(opt & OPT_a)) {
|
---|
[821] | 2182 | FILE *mountTable = setmntent(bb_path_mtab_file, "r");
|
---|
| 2183 |
|
---|
[2725] | 2184 | if (!mountTable)
|
---|
| 2185 | bb_error_msg_and_die("no %s", bb_path_mtab_file);
|
---|
[821] | 2186 |
|
---|
[2725] | 2187 | while (getmntent_r(mountTable, &mtpair[0], getmntent_buf,
|
---|
| 2188 | GETMNTENT_BUFSIZE))
|
---|
[821] | 2189 | {
|
---|
[1765] | 2190 | // Don't show rootfs. FIXME: why??
|
---|
| 2191 | // util-linux 2.12a happily shows rootfs...
|
---|
[2725] | 2192 | //if (strcmp(mtpair->mnt_fsname, "rootfs") == 0) continue;
|
---|
[821] | 2193 |
|
---|
[2725] | 2194 | if (!fstype || strcmp(mtpair->mnt_type, fstype) == 0)
|
---|
[821] | 2195 | printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
|
---|
| 2196 | mtpair->mnt_dir, mtpair->mnt_type,
|
---|
| 2197 | mtpair->mnt_opts);
|
---|
| 2198 | }
|
---|
[2725] | 2199 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 2200 | endmntent(mountTable);
|
---|
[821] | 2201 | return EXIT_SUCCESS;
|
---|
| 2202 | }
|
---|
[2725] | 2203 | storage_path = NULL;
|
---|
| 2204 | } else {
|
---|
| 2205 | // When we have two arguments, the second is the directory and we can
|
---|
| 2206 | // skip looking at fstab entirely. We can always abspath() the directory
|
---|
| 2207 | // argument when we get it.
|
---|
| 2208 | if (argv[1]) {
|
---|
| 2209 | if (nonroot)
|
---|
| 2210 | bb_error_msg_and_die(bb_msg_you_must_be_root);
|
---|
| 2211 | mtpair->mnt_fsname = argv[0];
|
---|
| 2212 | mtpair->mnt_dir = argv[1];
|
---|
| 2213 | mtpair->mnt_type = fstype;
|
---|
| 2214 | mtpair->mnt_opts = cmdopts;
|
---|
| 2215 | resolve_mount_spec(&mtpair->mnt_fsname);
|
---|
| 2216 | rc = singlemount(mtpair, /*ignore_busy:*/ 0);
|
---|
| 2217 | return rc;
|
---|
| 2218 | }
|
---|
| 2219 | storage_path = bb_simplify_path(argv[0]); // malloced
|
---|
| 2220 | }
|
---|
[821] | 2221 |
|
---|
[2725] | 2222 | // Past this point, we are handling either "mount -a [opts]"
|
---|
| 2223 | // or "mount [opts] single_param"
|
---|
[821] | 2224 |
|
---|
[3232] | 2225 | cmdopt_flags = parse_mount_options(cmdopts, NULL);
|
---|
| 2226 | if (nonroot && (cmdopt_flags & ~MS_SILENT)) // Non-root users cannot specify flags
|
---|
[2725] | 2227 | bb_error_msg_and_die(bb_msg_you_must_be_root);
|
---|
[821] | 2228 |
|
---|
[1765] | 2229 | // If we have a shared subtree flag, don't worry about fstab or mtab.
|
---|
| 2230 | if (ENABLE_FEATURE_MOUNT_FLAGS
|
---|
[3232] | 2231 | && (cmdopt_flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
|
---|
[1765] | 2232 | ) {
|
---|
[2725] | 2233 | // verbose_mount(source, target, type, flags, data)
|
---|
[3232] | 2234 | rc = verbose_mount("", argv[0], "", cmdopt_flags, "");
|
---|
[2725] | 2235 | if (rc)
|
---|
| 2236 | bb_simple_perror_msg_and_die(argv[0]);
|
---|
| 2237 | return rc;
|
---|
[1765] | 2238 | }
|
---|
| 2239 |
|
---|
[3621] | 2240 | // A malicious user could overmount /usr without this.
|
---|
| 2241 | if (ENABLE_FEATURE_MOUNT_OTHERTAB && nonroot)
|
---|
| 2242 | fstabname = "/etc/fstab";
|
---|
[821] | 2243 | // Open either fstab or mtab
|
---|
[3232] | 2244 | if (cmdopt_flags & MS_REMOUNT) {
|
---|
[2725] | 2245 | // WARNING. I am not sure this matches util-linux's
|
---|
| 2246 | // behavior. It's possible util-linux does not
|
---|
| 2247 | // take -o opts from mtab (takes only mount source).
|
---|
[1765] | 2248 | fstabname = bb_path_mtab_file;
|
---|
| 2249 | }
|
---|
| 2250 | fstab = setmntent(fstabname, "r");
|
---|
| 2251 | if (!fstab)
|
---|
[2725] | 2252 | bb_perror_msg_and_die("can't read '%s'", fstabname);
|
---|
[821] | 2253 |
|
---|
[2725] | 2254 | // Loop through entries until we find what we're looking for
|
---|
[1765] | 2255 | memset(mtpair, 0, sizeof(mtpair));
|
---|
[821] | 2256 | for (;;) {
|
---|
[2725] | 2257 | struct mntent *mtother = (mtcur==mtpair ? mtpair+1 : mtpair);
|
---|
[821] | 2258 |
|
---|
| 2259 | // Get next fstab entry
|
---|
[2725] | 2260 | if (!getmntent_r(fstab, mtcur, getmntent_buf
|
---|
| 2261 | + (mtcur==mtpair ? GETMNTENT_BUFSIZE/2 : 0),
|
---|
| 2262 | GETMNTENT_BUFSIZE/2)
|
---|
| 2263 | ) { // End of fstab/mtab is reached
|
---|
| 2264 | mtcur = mtother; // the thing we found last time
|
---|
| 2265 | break;
|
---|
[821] | 2266 | }
|
---|
| 2267 |
|
---|
[2725] | 2268 | // If we're trying to mount something specific and this isn't it,
|
---|
| 2269 | // skip it. Note we must match the exact text in fstab (ala
|
---|
| 2270 | // "proc") or a full path from root
|
---|
| 2271 | if (argv[0]) {
|
---|
[821] | 2272 |
|
---|
| 2273 | // Is this what we're looking for?
|
---|
[2725] | 2274 | if (strcmp(argv[0], mtcur->mnt_fsname) != 0
|
---|
| 2275 | && strcmp(storage_path, mtcur->mnt_fsname) != 0
|
---|
| 2276 | && strcmp(argv[0], mtcur->mnt_dir) != 0
|
---|
| 2277 | && strcmp(storage_path, mtcur->mnt_dir) != 0
|
---|
| 2278 | ) {
|
---|
| 2279 | continue; // no
|
---|
| 2280 | }
|
---|
[821] | 2281 |
|
---|
[2725] | 2282 | // Remember this entry. Something later may have
|
---|
| 2283 | // overmounted it, and we want the _last_ match.
|
---|
| 2284 | mtcur = mtother;
|
---|
[821] | 2285 |
|
---|
[2725] | 2286 | // If we're mounting all
|
---|
[821] | 2287 | } else {
|
---|
[2725] | 2288 | struct mntent *mp;
|
---|
| 2289 | // No, mount -a won't mount anything,
|
---|
| 2290 | // even user mounts, for mere humans
|
---|
| 2291 | if (nonroot)
|
---|
| 2292 | bb_error_msg_and_die(bb_msg_you_must_be_root);
|
---|
[821] | 2293 |
|
---|
[2725] | 2294 | // Does type match? (NULL matches always)
|
---|
| 2295 | if (!match_fstype(mtcur, fstype))
|
---|
| 2296 | continue;
|
---|
[821] | 2297 |
|
---|
[2725] | 2298 | // Skip noauto and swap anyway
|
---|
| 2299 | if ((parse_mount_options(mtcur->mnt_opts, NULL) & (MOUNT_NOAUTO | MOUNT_SWAP))
|
---|
| 2300 | // swap is bogus "fstype", parse_mount_options can't check fstypes
|
---|
| 2301 | || strcasecmp(mtcur->mnt_type, "swap") == 0
|
---|
| 2302 | ) {
|
---|
| 2303 | continue;
|
---|
| 2304 | }
|
---|
[821] | 2305 |
|
---|
[2725] | 2306 | // Does (at least one) option match?
|
---|
| 2307 | // (NULL matches always)
|
---|
| 2308 | if (!match_opt(mtcur->mnt_opts, O_optmatch))
|
---|
| 2309 | continue;
|
---|
[1765] | 2310 |
|
---|
[2725] | 2311 | resolve_mount_spec(&mtcur->mnt_fsname);
|
---|
[1765] | 2312 |
|
---|
| 2313 | // NFS mounts want this to be xrealloc-able
|
---|
| 2314 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
[2725] | 2315 |
|
---|
| 2316 | // If nothing is mounted on this directory...
|
---|
| 2317 | // (otherwise repeated "mount -a" mounts everything again)
|
---|
| 2318 | mp = find_mount_point(mtcur->mnt_dir, /*subdir_too:*/ 0);
|
---|
| 2319 | // We do not check fsname match of found mount point -
|
---|
| 2320 | // "/" may have fsname of "/dev/root" while fstab
|
---|
| 2321 | // says "/dev/something_else".
|
---|
| 2322 | if (mp) {
|
---|
| 2323 | if (verbose) {
|
---|
| 2324 | bb_error_msg("according to %s, "
|
---|
| 2325 | "%s is already mounted on %s",
|
---|
| 2326 | bb_path_mtab_file,
|
---|
| 2327 | mp->mnt_fsname, mp->mnt_dir);
|
---|
| 2328 | }
|
---|
| 2329 | } else {
|
---|
| 2330 | // ...mount this thing
|
---|
| 2331 | if (singlemount(mtcur, /*ignore_busy:*/ 1)) {
|
---|
| 2332 | // Count number of failed mounts
|
---|
| 2333 | rc++;
|
---|
| 2334 | }
|
---|
[821] | 2335 | }
|
---|
[1765] | 2336 | free(mtcur->mnt_opts);
|
---|
[821] | 2337 | }
|
---|
| 2338 | }
|
---|
| 2339 |
|
---|
[2725] | 2340 | // End of fstab/mtab is reached.
|
---|
| 2341 | // Were we looking for something specific?
|
---|
| 2342 | if (argv[0]) { // yes
|
---|
[3232] | 2343 | unsigned long l;
|
---|
[821] | 2344 |
|
---|
[2725] | 2345 | // If we didn't find anything, complain
|
---|
| 2346 | if (!mtcur->mnt_fsname)
|
---|
| 2347 | bb_error_msg_and_die("can't find %s in %s",
|
---|
| 2348 | argv[0], fstabname);
|
---|
| 2349 |
|
---|
| 2350 | // What happens when we try to "mount swap_partition"?
|
---|
| 2351 | // (fstab containts "swap_partition swap swap defaults 0 0")
|
---|
| 2352 | // util-linux-ng 2.13.1 does this:
|
---|
| 2353 | // stat("/sbin/mount.swap", 0x7fff62a3a350) = -1 ENOENT (No such file or directory)
|
---|
| 2354 | // mount("swap_partition", "swap", "swap", MS_MGC_VAL, NULL) = -1 ENOENT (No such file or directory)
|
---|
| 2355 | // lstat("swap", 0x7fff62a3a640) = -1 ENOENT (No such file or directory)
|
---|
| 2356 | // write(2, "mount: mount point swap does not exist\n", 39) = 39
|
---|
| 2357 | // exit_group(32) = ?
|
---|
| 2358 | #if 0
|
---|
| 2359 | // In case we want to simply skip swap partitions:
|
---|
| 2360 | l = parse_mount_options(mtcur->mnt_opts, NULL);
|
---|
| 2361 | if ((l & MOUNT_SWAP)
|
---|
| 2362 | // swap is bogus "fstype", parse_mount_options can't check fstypes
|
---|
| 2363 | || strcasecmp(mtcur->mnt_type, "swap") == 0
|
---|
| 2364 | ) {
|
---|
| 2365 | goto ret;
|
---|
| 2366 | }
|
---|
| 2367 | #endif
|
---|
| 2368 | if (nonroot) {
|
---|
| 2369 | // fstab must have "users" or "user"
|
---|
| 2370 | l = parse_mount_options(mtcur->mnt_opts, NULL);
|
---|
| 2371 | if (!(l & MOUNT_USERS))
|
---|
| 2372 | bb_error_msg_and_die(bb_msg_you_must_be_root);
|
---|
| 2373 | }
|
---|
| 2374 |
|
---|
| 2375 | //util-linux-2.12 does not do this check.
|
---|
| 2376 | //// If nothing is mounted on this directory...
|
---|
| 2377 | //// (otherwise repeated "mount FOO" mounts FOO again)
|
---|
| 2378 | //mp = find_mount_point(mtcur->mnt_dir, /*subdir_too:*/ 0);
|
---|
| 2379 | //if (mp) {
|
---|
| 2380 | // bb_error_msg("according to %s, "
|
---|
| 2381 | // "%s is already mounted on %s",
|
---|
| 2382 | // bb_path_mtab_file,
|
---|
| 2383 | // mp->mnt_fsname, mp->mnt_dir);
|
---|
| 2384 | //} else {
|
---|
| 2385 | // ...mount the last thing we found
|
---|
| 2386 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
| 2387 | append_mount_options(&(mtcur->mnt_opts), cmdopts);
|
---|
| 2388 | resolve_mount_spec(&mtpair->mnt_fsname);
|
---|
| 2389 | rc = singlemount(mtcur, /*ignore_busy:*/ 0);
|
---|
| 2390 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 2391 | free(mtcur->mnt_opts);
|
---|
| 2392 | //}
|
---|
| 2393 | }
|
---|
| 2394 |
|
---|
| 2395 | //ret:
|
---|
| 2396 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 2397 | endmntent(fstab);
|
---|
[821] | 2398 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 2399 | free(storage_path);
|
---|
| 2400 | free(cmdopts);
|
---|
| 2401 | }
|
---|
| 2402 |
|
---|
[2725] | 2403 | //TODO: exitcode should be ORed mask of (from "man mount"):
|
---|
| 2404 | // 0 success
|
---|
| 2405 | // 1 incorrect invocation or permissions
|
---|
| 2406 | // 2 system error (out of memory, cannot fork, no more loop devices)
|
---|
| 2407 | // 4 internal mount bug or missing nfs support in mount
|
---|
| 2408 | // 8 user interrupt
|
---|
| 2409 | //16 problems writing or locking /etc/mtab
|
---|
| 2410 | //32 mount failure
|
---|
| 2411 | //64 some mount succeeded
|
---|
[821] | 2412 | return rc;
|
---|
| 2413 | }
|
---|