Commit graph

15 commits

Author SHA1 Message Date
Will McVicker
87b2ef0edf libmodprobe: refactor blocklist functionality
Remove the function EnableBlocklist() and add a constructor argument to
enable/disable the use of modules.blocklist. In all cases, the
enabling/disabling of the blocklist happens immediately after creating
the Modprobe object. So this simplies libmodprobe.

Additionally, the use of the blocklist by libmodprobe should be enabled
by default unless explicitly disabled during creation of the Modprobe
object. Currently, only modprobe(8) defaults to not using the blocklist
and includes the argument -b BLOCKLIST for enabling it. That
functionality remains.

This refactor allows us to use the blocklist during first stage init.
However, additional logic is needed to not return an error for the
blocked non-aliased modules during first stage init; otherwise, the
error would result in an init crash leading to a device reboot. So fixup
LoadListedModules() to allow blocking modules without returning an
error.

Bug: 182582036
Test: boot test on pixel 5 with a module in modules.blocklist
Change-Id: I394b5aa98fa98821011982cfe693749010c381f7
2021-03-31 09:34:47 -07:00
Mark Salyzyn
ce30bb8e4b libmodprobe: remove unused EnableVerbose() method
modprobe command no longer uses EnableVerbose, opting to do the
associated operations directly.

Test: compile
Change-Id: Iffc8324f37f34de4eeb9a27e92fdf5524afa2220
2020-06-26 22:30:21 +00:00
Mark Salyzyn
703fb74fb5 modprobe: Use more inclusive language for modprobe and libmodprobe
blacklist is replaced with blocklist.

Test: none
Change-Id: I59f9fde5900b9aee82aca1eab4a6ded3d136063b
2020-06-15 12:51:38 -07:00
Steve Muckle
b0c4881ea9 add libmodprobe api to query the number of modules loaded
In the short term this will be used to help implement support for
multiple kernel module directories but it may be useful in other
contexts as well.

Bug: 157645635
Change-Id: I15a252b6e9394292c8f3557ed65112c935830441
2020-06-03 10:51:45 -07:00
Steve Muckle
4c59323dc6 first_stage_init: load modules in modules.load.recovery in recovery
In recovery mode, load modules from modules.load.recovery if it
exists. Otherwise load from modules.load as usual.

Change-Id: I7636bb5958ed10ae9a66015f04f168129618272f
2020-04-06 12:24:16 -07:00
Steve Muckle
373a3cadd7 libmodprobe: parse kernel command line for module options
Bug: 145808811
Test: atest libmodprobe_tests, verify on flame
Change-Id: I0b41b1610fe13ae526d38f029da888f6f0d8a02d
2019-12-27 13:39:23 -08:00
Mark Salyzyn
d478271b2b libmodprobe: add strict bool argument to LoadListedModules
Continue loading remaining modules after error if strict flag false.

Test: libmodprobe_test
Bug: 141311820
Change-Id: Ib21d4eade1254b16621e7bf2c9efaa173092e7c7
2019-10-31 10:30:35 -07:00
Mark Salyzyn
8c1051918e libmodprobe: Do not reload modules previously instantiated
For modprobe operation.

For an interlocking driver set of about 50 modules, the impact of
their dependencies resulted in a 30 second impact in boot time
trying to load previously loaded modules. This impact is handily
eliminated by keeping a list of modules paths that have been loaded
and skipping them proactively.

Test: Confirmed device boot and 50 module set of drivers functions.
Test: libmodprobe_tests
Bug: 142938937
Bug: 140827934
Change-Id: Iccd11399d6043b38cbd5f93578ee202022e7770c
2019-10-30 07:20:18 -07:00
Steve Muckle
ded44c06be libmodprobe: add verbose mode
Change-Id: I2be18320461cd712a4828400b8f29bb5f07c801f
2019-08-06 13:58:13 -07:00
Steve Muckle
781aa78ee2 libmodprobe: add GetAllDependencies
Add a method to retrieve the dependencies (both hard and soft) of a
module.

Change-Id: Ie44ceb3e36856bb1a3e68c5d3c0d55a38deb0ef9
2019-08-06 13:58:13 -07:00
Steve Muckle
012cfa19b0 libmodprobe: add support to list modules
List the known modules with a name matching a given pattern.

Change-Id: I7f6bd1f09a688c66682f94c5837e61d7dc61c1f7
2019-08-06 13:58:13 -07:00
Steve Muckle
e31f840a0a libmodprobe: add support for a blacklist
If the blacklist is enabled, blacklisted modules are treated as though
they are not present.

Change-Id: Ie8712f24298e78f92d5028b1ca3a8a3e07a9190a
2019-08-06 13:58:13 -07:00
Steve Muckle
13700a69d3 libmodprobe: support parameters in LoadWithAliases
Add support to specify module parameters in LoadWithAliases. These
parameters will be appended to any which are specified for the module in
modules.options.

Change-Id: I9aff1656ea397826f815b658b3b52c1892748601
2019-08-06 13:58:13 -07:00
Steve Muckle
bb58b01574 libmodprobe: add support to remove modules
Add a remove method which will unload a given module from the kernel,
along with any modules it depended on, assuming those modules are now
unused.

Change-Id: Ie66dc153ef1771f50e26421d38d3656e95954780
2019-08-06 13:58:13 -07:00
Steve Muckle
18b981ea7c create libmodprobe, integrate into first_stage_init
Modprobe functionality is required both within first stage init and also
as a standalone binary. Create a library for this using and extending
the logic in modalias_handler.cpp.

First stage init will attempt to load modules from /lib/modules.

Bug: 129780532
Change-Id: Ie3582358fd839c2f64e1b386b30ed551a86aef5d
2019-06-18 13:24:56 -07:00