mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-13 20:12:26 +00:00
56738a1c70
Unsquashed version at v2-rc-unsquashed, but that cannot be merged as it breaks bisects at several points. All bugs will not bisect to this humongous change. It all started with a conversion of the Bash scripts to Python, mainly because I couldn't stand not being able to properly use --options for run which has a million options. Then since that required a full testing, I decided to do all the refactorings that I had in mind at once, and so I did and it became v2-rc. This is the largest patch I have ever done! OMG a few weeks of extra time. I'm never writing a Bash script for anything that starts getting big again. Some of the features are: * separate build-qemu and build-gem5 commands * common: convert scripts to python. Add --option for everything * rename build to build-buildroot now that we are splitting all the build commands, Linux kernel to follow * move all git submodules to submodules/ and all buildroot packages to packages/ * refactor the out/ structure. Keep projects on toplevel, because guest projects separate archs and host ones don't, making a toplevel arch wrong * do-release: rename to just release https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it * run: add --terminal and explain gem5 pdb * just track the lvimrc * store CLI kernel config fragment inside buildlroot to avoid conflicts * gem5: document m5 initparam * readme: make a bunch of things awesomer * readme: fix broken refs * parsec-benchmark: update to 75d55ac446a43c47efb1044844a108c6c330184c Could not fetch otherwise. * gem5: M5_OVERRIDE_PY_SOURCE
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#sysfs */
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#include <linux/init.h>
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#include <linux/kobject.h>
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#include <linux/module.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/sysfs.h>
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#include <uapi/linux/stat.h> /* S_IRUSR, S_IWUSR */
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enum { FOO_SIZE_MAX = 4 };
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static int foo_size;
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static char foo_tmp[FOO_SIZE_MAX];
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static ssize_t foo_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buff)
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{
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strncpy(buff, foo_tmp, foo_size);
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return foo_size;
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}
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static ssize_t foo_store(struct kobject *kobj, struct kobj_attribute *attr,
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const char *buff, size_t count)
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{
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foo_size = min(count, (size_t)FOO_SIZE_MAX);
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strncpy(foo_tmp, buff, foo_size);
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return count;
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}
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static struct kobj_attribute foo_attribute =
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__ATTR(foo, S_IRUGO | S_IWUSR, foo_show, foo_store);
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static struct attribute *attrs[] = {
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&foo_attribute.attr,
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NULL,
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};
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static struct attribute_group attr_group = {
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.attrs = attrs,
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};
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static struct kobject *kobj;
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static int myinit(void)
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{
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int ret;
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kobj = kobject_create_and_add("lkmc_sysfs", kernel_kobj);
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if (!kobj)
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return -ENOMEM;
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ret = sysfs_create_group(kobj, &attr_group);
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if (ret)
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kobject_put(kobj);
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return ret;
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}
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static void myexit(void)
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{
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kobject_put(kobj);
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}
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module_init(myinit);
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module_exit(myexit);
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MODULE_LICENSE("GPL");
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