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bonding: use hwaddr of the slave rather than the master #19

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alexharpin
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When a bonded interface is brought up, any slaves included in the bond
have their hardware address set to that of the bond master. Although
this allows an interface to be brought up on start up, when the
configuration file is imported into the booted system it prevents
the bonded interface being successfully restarted.

The fix involves obtaining the hardware address of the slaves before
they are added to the bond and then using this value in the
configuration file.

When a bonded interface is brought up, any slaves included in the bond
have their hardware address set to that of the bond master.  Although
this allows an interface to be brought up on start up, when the
configuration file is imported into the booted system it prevents
the bonded interface being successfully restarted.

The fix involves obtaining the hardware address of the slaves before
they are added to the bond and then using this value in the
configuration file.
@alexharpin
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Just realised I forgot to include the bugzilla entry at the time as well:

https://bugzilla.redhat.com/show_bug.cgi?id=1096954

Are there any test cases etc I need to run this against to make sure it's fine? I've tested in a few systems (all Fedora 20) that I have access to and it works as expected on those; fixing the issue I was having when bringing a bonded interface up during the initial boot process.

@haraldh
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haraldh commented Jun 3, 2014

pushed, thanks!

@haraldh haraldh closed this Jun 3, 2014
@alexharpin
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No problem, thanks for looking it over and committing. Time to track down and figure out another one that's related to this one :)

@johannbg johannbg added ifcfg Issues related to the ifcfg module modules Issue tracker for all modules network Issues related to the network module labels Aug 6, 2020
runsisi added a commit to runsisi/dracut that referenced this pull request Aug 6, 2022
in install_dependent_modules we use &path[kerneldirlen] as the key for inserting,
let's do the same for checking.

otherwise installing kernel module has circular dependency from a custom kernel
module directory will cause infinite recursion and segfault.

$ grep ipmi kbuilt/lib/modules/5.10.121/modules.dep
kernel/drivers/char/ipmi/ipmi_msghandler.ko:
kernel/drivers/char/ipmi/ipmi_devintf.ko: kernel/drivers/char/ipmi/ipmi_msghandler.ko

$ grep ipmi kbuilt/lib/modules/5.10.121/modules.softdep
softdep ipmi_msghandler post: ipmi_devintf

$ ./dracut-install -D /tmp --kerneldir ~/working/kernel/linux-5.10.121/kbuilt/lib/modules/5.10.121 -m ipmi-devintf
Segmentation fault (core dumped)

(gdb) b install_dependent_modules
Breakpoint 1 at 0x7db0: file src/install/dracut-install.c, line 1513.
(gdb) bt
#0  install_dependent_modules (modlist=0x0) at src/install/dracut-install.c:1513
dracutdevs#1  0x000055555555c027 in install_dependent_modules (modlist=modlist@entry=0x555555579e90) at src/install/dracut-install.c:1553
dracutdevs#2  0x000055555555bf1c in install_dependent_modules (modlist=0x5555555799d0) at src/install/dracut-install.c:1548
dracutdevs#3  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557a3f0) at src/install/dracut-install.c:1554
dracutdevs#4  0x000055555555bf1c in install_dependent_modules (modlist=0x555555579d60) at src/install/dracut-install.c:1548
dracutdevs#5  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557b170) at src/install/dracut-install.c:1554
dracutdevs#6  0x000055555555bf1c in install_dependent_modules (modlist=0x55555557a0f0) at src/install/dracut-install.c:1548
dracutdevs#7  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555575320) at src/install/dracut-install.c:1554
dracutdevs#8  0x000055555555bf1c in install_dependent_modules (modlist=0x55555557ab30) at src/install/dracut-install.c:1548
dracutdevs#9  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557dd60) at src/install/dracut-install.c:1554
dracutdevs#10 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557b640) at src/install/dracut-install.c:1548
dracutdevs#11 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557e0f0) at src/install/dracut-install.c:1554
dracutdevs#12 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557b9d0) at src/install/dracut-install.c:1548
dracutdevs#13 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555574340) at src/install/dracut-install.c:1554
dracutdevs#14 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557cf70) at src/install/dracut-install.c:1548
dracutdevs#15 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x5555555768d0) at src/install/dracut-install.c:1554
dracutdevs#16 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557d750) at src/install/dracut-install.c:1548
dracutdevs#17 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557e700) at src/install/dracut-install.c:1554
dracutdevs#18 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557de90) at src/install/dracut-install.c:1548
dracutdevs#19 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555581c90) at src/install/dracut-install.c:1554
dracutdevs#20 0x000055555555bf1c in install_dependent_modules (modlist=0x555555571e60) at src/install/dracut-install.c:1548
dracutdevs#21 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555556b620) at src/install/dracut-install.c:1554
dracutdevs#22 0x000055555555bf1c in install_dependent_modules (modlist=0x555555583000) at src/install/dracut-install.c:1548
dracutdevs#23 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555556b640) at src/install/dracut-install.c:1554
dracutdevs#24 0x000055555555bf1c in install_dependent_modules (modlist=0x555555571b40) at src/install/dracut-install.c:1548
dracutdevs#25 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555574100) at src/install/dracut-install.c:1554
dracutdevs#26 0x000055555555c4b0 in install_module (mod=mod@entry=0x555555573bc0) at src/install/dracut-install.c:1617
dracutdevs#27 0x000055555555c93d in install_modules (argc=argc@entry=1, argv=argv@entry=0x7fffffffd6e0) at src/install/dracut-install.c:1952
dracutdevs#28 0x000055555555862a in main (argc=<optimized out>, argv=0x7fffffffd6a8) at src/install/dracut-install.c:2090

Signed-off-by: runsisi <runsisi@hust.edu.cn>
johannbg pushed a commit that referenced this pull request Aug 15, 2022
in install_dependent_modules we use &path[kerneldirlen] as the key for inserting,
let's do the same for checking.

otherwise installing kernel module has circular dependency from a custom kernel
module directory will cause infinite recursion and segfault.

$ grep ipmi kbuilt/lib/modules/5.10.121/modules.dep
kernel/drivers/char/ipmi/ipmi_msghandler.ko:
kernel/drivers/char/ipmi/ipmi_devintf.ko: kernel/drivers/char/ipmi/ipmi_msghandler.ko

$ grep ipmi kbuilt/lib/modules/5.10.121/modules.softdep
softdep ipmi_msghandler post: ipmi_devintf

$ ./dracut-install -D /tmp --kerneldir ~/working/kernel/linux-5.10.121/kbuilt/lib/modules/5.10.121 -m ipmi-devintf
Segmentation fault (core dumped)

(gdb) b install_dependent_modules
Breakpoint 1 at 0x7db0: file src/install/dracut-install.c, line 1513.
(gdb) bt
#0  install_dependent_modules (modlist=0x0) at src/install/dracut-install.c:1513
#1  0x000055555555c027 in install_dependent_modules (modlist=modlist@entry=0x555555579e90) at src/install/dracut-install.c:1553
#2  0x000055555555bf1c in install_dependent_modules (modlist=0x5555555799d0) at src/install/dracut-install.c:1548
#3  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557a3f0) at src/install/dracut-install.c:1554
#4  0x000055555555bf1c in install_dependent_modules (modlist=0x555555579d60) at src/install/dracut-install.c:1548
#5  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557b170) at src/install/dracut-install.c:1554
#6  0x000055555555bf1c in install_dependent_modules (modlist=0x55555557a0f0) at src/install/dracut-install.c:1548
#7  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555575320) at src/install/dracut-install.c:1554
#8  0x000055555555bf1c in install_dependent_modules (modlist=0x55555557ab30) at src/install/dracut-install.c:1548
#9  0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557dd60) at src/install/dracut-install.c:1554
#10 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557b640) at src/install/dracut-install.c:1548
#11 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557e0f0) at src/install/dracut-install.c:1554
#12 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557b9d0) at src/install/dracut-install.c:1548
#13 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555574340) at src/install/dracut-install.c:1554
#14 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557cf70) at src/install/dracut-install.c:1548
#15 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x5555555768d0) at src/install/dracut-install.c:1554
#16 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557d750) at src/install/dracut-install.c:1548
#17 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555557e700) at src/install/dracut-install.c:1554
#18 0x000055555555bf1c in install_dependent_modules (modlist=0x55555557de90) at src/install/dracut-install.c:1548
#19 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555581c90) at src/install/dracut-install.c:1554
#20 0x000055555555bf1c in install_dependent_modules (modlist=0x555555571e60) at src/install/dracut-install.c:1548
#21 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555556b620) at src/install/dracut-install.c:1554
#22 0x000055555555bf1c in install_dependent_modules (modlist=0x555555583000) at src/install/dracut-install.c:1548
#23 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x55555556b640) at src/install/dracut-install.c:1554
#24 0x000055555555bf1c in install_dependent_modules (modlist=0x555555571b40) at src/install/dracut-install.c:1548
#25 0x000055555555c034 in install_dependent_modules (modlist=modlist@entry=0x555555574100) at src/install/dracut-install.c:1554
#26 0x000055555555c4b0 in install_module (mod=mod@entry=0x555555573bc0) at src/install/dracut-install.c:1617
#27 0x000055555555c93d in install_modules (argc=argc@entry=1, argv=argv@entry=0x7fffffffd6e0) at src/install/dracut-install.c:1952
#28 0x000055555555862a in main (argc=<optimized out>, argv=0x7fffffffd6a8) at src/install/dracut-install.c:2090

Signed-off-by: runsisi <runsisi@hust.edu.cn>
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