mirror of https://github.com/dynup/kpatch
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
|
||
|---|---|---|
| .. | ||
| Makefile | ||
| kpatch-macros.h | ||
| kpatch-patch-hook.c | ||
| kpatch-patch.h | ||
| kpatch.h | ||
| kpatch.lds.S | ||
| livepatch-patch-hook.c | ||
| patch-hook.c | ||