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23 Commits

Author SHA1 Message Date
Mike Frysinger
3a45b87ac3 modutils: support finit_module syscall 
On some systems like Chromium OS, loading modules from non-verified
filesystems is denied.  Only finit_module is allowed because an open
fd is passed which can be checked against a verified location.

Change the module loading code to first attempt finit_module and if
that fails for whatever reason, fall back to the existing logic.

On x86_64, this adds ~80 bytes to modutils/modutils.o and ~68 bytes
to modutils/modprobe-small.o.

Signed-off-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-15 12:16:33 +02:00
Denys Vlasenko
196e400441 modutils: fix build error with !DEPMOD 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-11-06 15:50:28 +01:00
Timo Teräs
48dc80bbba modutils: merge module_entry and module_info to common 
This merges the in-memory module info structures of modprobe
and depmod. This allows sharing hashing by modulename code
improving depmod runtime with almost factor of 2x.

function                                             old     new   delta
get_or_add_modentry                                    -      17     +17
do_modprobe                                          590     601     +11
moddb_get_or_create                                    -      10     +10
load_modules_dep                                     195     205     +10
moddb_get                                              -       7      +7
add_probe                                             81      78      -3
modprobe_main                                        721     714      -7
depmod_main                                          553     543     -10
config_file_action                                   434     421     -13
helper_get_module                                    160     144     -16
parse_module                                         343     320     -23
order_dep_list                                       105      82     -23
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 2/7 up/down: 55/-95)            Total: -40 bytes

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-11-05 18:54:55 +01:00
Denys Vlasenko
cd13974b20 rmmod: fix bad error message 
Before:

    ># busybox_old rmmod gtrhfhdfghdf
    rmmod: can't unload 'gtrhfhdfghdf': unknown symbol in module, or unknown parameter

    After:

    ># busybox rmmod gtrhfhdfghdf
    rmmod: can't unload module 'gtrhfhdfghdf': No such file or directory

function                                             old     new   delta
modprobe_main                                        726     721      -5
do_modprobe                                          599     590      -9
rmmod_main                                           187     169     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-32)             Total: -32 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-24 04:17:04 +02:00
Denys Vlasenko
cc70b6f8b6 depmod: simple memory optimization 
function                                             old     new   delta
filename2modname                                      67      86     +19
parse_module                                         374     351     -23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-01-24 22:30:30 +01:00
Denys Vlasenko
78854520eb modprobe: revert checking for /, stop doing basename() on modprobe args 
function                                             old     new   delta
process_module                                       726     719      -7
filename2modname                                      81      67     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-21)             Total: -21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-01-01 19:02:40 +01:00
Denys Vlasenko
c5830bdf65 modprobe/insmod: fix parameter quoting 
function                                             old     new   delta
parse_cmdline_module_options                         102     157     +55
modprobe_main                                        657     662      +5
insmod_main                                           68      70      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 62/0)               Total: 62 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-02-02 00:01:07 +01:00
Denys Vlasenko
8ae386bf19 revert commit 1396221d5a 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-02-01 23:24:25 +01:00
Denys Vlasenko
1cd0d86005 modutils: explain why we no longer quote params 
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
 2010-08-25 18:26:46 +02:00
Carmelo AMOROSO
1396221d5a insmod: Do not add a pair of "" around the arguments of the module. 
If there are some spaces in the insmod command line, then
this will be splitted in single words as separate elements of
argv. It just needs to chain them together in the options string
passed to the sys_init_module syscall.

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
 2010-08-25 18:19:22 +02:00
Denys Vlasenko
0ef64bdb40 *: make GNU licensing statement forms more regular 
This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2010-08-16 20:14:46 +02:00
Denys Vlasenko
77c066ea5c modutils: add FEATURE_INSMOD_TRY_MMAP option 
function                                             old     new   delta
try_to_mmap_module                                     -     121    +121
bb_init_module_24                                   4514    4578     +64
bb_init_module                                       119     173     +54
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 239/0)             Total: 239 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2009-10-25 04:35:22 +01:00
Denys Vlasenko
ee47f6e44f modprobe: correct exitcode handling and error messages with respect to -q 
function                                             old     new   delta
do_modprobe                                          319     339     +20
bb_delete_module                                      10      26     +16
moderror                                              62      71      +9
bb_init_module                                       112     119      +7
modprobe_main                                        488     494      +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/0 up/down: 58/0)               Total: 58 bytes

Signed-off-by: Gilles Espinasse <g.esp@free.fr>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2009-06-17 18:46:06 +02:00
Denys Vlasenko
16bda3bd1f depmod: fix handling of .gz modules 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2009-05-18 13:08:04 +02:00
Denis Vlasenko
0b791d9a97 move llist_find_str from modutils to libbb 2009-04-13 20:52:00 +00:00
Denis Vlasenko
4144504912 modutils: remove redundant sanitization 2009-04-13 20:32:31 +00:00
Denis Vlasenko
0d907eab6c modutils: dont pass NULL options to init_module() 2009-03-29 17:25:14 +00:00
Denis Vlasenko
3b5c9b8885 insmod/modprobe: do not pass NULL to kernel as module parameter 2009-03-13 23:43:26 +00:00
Denis Vlasenko
c5741003e9 modutils: delete unused global variable 
function                                             old     new   delta
modprobe_main                                        570     567      -3
insmod_main                                          101      98      -3
insmod_outputname                                      4       -      -4
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/2 up/down: 0/-10)             Total: -10 bytes
   text    data     bss     dec     hex filename
 816784     476    7892  825152   c9740 busybox_old
 816778     476    7888  825142   c9736 busybox_unstripped
 2009-03-05 09:26:17 +00:00
Denis Vlasenko
48637e0924 modutils: oveflow fix 2009-02-26 12:00:52 +00:00
Denis Vlasenko
fc66892abd *: remove superfluous casts. no code changes 2008-11-06 02:32:31 +00:00
Denis Vlasenko
bb26db49b1 modprobe: fix a segfault when modprobe is called with no arguments at all 
function                                             old     new   delta
modprobe_main                                        559     535     -24
 2008-10-31 02:04:28 +00:00
Denis Vlasenko
ba1315d0fb modutils/*: rewrite by Timo Teras <timo.teras AT iki.fi> 
- a lot faster (linear algorithmic complexity, smaller memory foot print)
- a lot smaller (the old code was overly complicated)
- loading of aliases is now module-init-tools compliant
- blacklisting is done correctly (-b option added)
- module argument quoting done right
- depmod now correctly generates modules.symbols and modules.alias

add/remove: 16/21 grow/shrink: 4/6 up/down: 6930/-9316 Total: -2386 bytes
   text    data     bss     dec     hex filename
 806039     592    6680  813311   c68ff busybox_old
 803498     592    6676  810766   c5f0e busybox_unstripped
 2008-09-13 14:59:38 +00:00