mirror of
https://github.com/dynup/kpatch
synced 2024-12-29 08:42:02 +00:00
0bb5c106ef
Restructure kpatch's sysfs interface and mirror the sysfs tree after
livepatch's sysfs layout. With the current sysfs layout, we cannot
distinguish which object a function belongs to, and we cannot tell which
modules/objects are patched. Therefore, restructure the kpatch sysfs tree
such that module/object information is available. With the new layout, each
patched object has its own directory, with each function being a
subdirectory of its object.
Implement this by embedding a kobject struct within the kpatch_module,
kpatch_func, and kpatch_object structs and supplying their ktypes and
kobject release methods.
Before:
/sys/kernel/kpatch
└── patches
└── <patch_module>
├── checksum
├── enabled
└── functions
├── <function> # from <object1>
│ ├── new_addr
│ └── old_addr
├── <function> # from <object2>
│ ├── new_addr
│ └── old_addr
└─── <function> # from <object3>
├── new_addr
└── old_addr
After:
/sys/kernel/kpatch
└── <patch_module>
├── <object1>
│ └── <function,sympos>
│ ├── new_addr
│ └── old_addr
├── <object2>
│ └── <function,sympos>
│ ├── new_addr
│ └── old_addr
├── checksum
├── enabled
└── <object3>
└── <function,sympos>
├── new_addr
└── old_addr
28 lines
477 B
Bash
Executable File
28 lines
477 B
Bash
Executable File
#!/bin/bash
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#set -x
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rmmod testmod 2> /dev/null
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rmmod kpatch 2> /dev/null
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insmod testmod.ko || exit 1
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insmod kpatch.ko || exit 1
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if [[ "$(cat /sys/kernel/testmod/value)" != "2" ]]
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then
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exit 1
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fi
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insmod kpatch-patch.ko
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dmesg | tail
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if [[ "$(cat /sys/kernel/testmod/value)" != "3" ]]
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then
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exit 1
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fi
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echo 0 > /sys/kernel/kpatch/kpatch_patch/enabled
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rmmod kpatch-patch
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if [[ "$(cat /sys/kernel/testmod/value)" != "2" ]]
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then
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exit 1
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fi
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rmmod kpatch
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rmmod testmod
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echo "SUCCESS"
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