enabled_store

Name:enabled_store

Proto:static ssize_t enabled_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)

Type:ssize_t

Parameter:

Type	Parameter	Name
struct kobject *	kobj
struct kobj_attribute *	attr
const char *	buf
size_t	count

319

ret = kstrtobool - convert common user inputs into boolean values*@s: input string*@res: result* This routine returns 0 iff the first character is one of 'Yy1Nn0', or* [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL. Value

320

If ret Then Return ret

323

patch = container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(kobj, structklp_patch, kobj)

325

mutex_lock( & klp_mutex is a coarse lock which serializes access to klp data)

327

If enabled == enabled Then

329

330

Go to out

340

If patch == klp_transition_patch Then This function can be called in the middle of an existing transition to* reverse the direction of the target patch state. This can be done to* effectively cancel an existing enable or disable operation if there are any

342

Else if Not enabled Then ret = Sysfs Interface* /sys/kernel/livepatch* /sys/kernel/livepatch/* /sys/kernel/livepatch//enabled* /sys/kernel/livepatch//transition* /sys/kernel/livepatch//force* /sys/kernel/livepatch//

Else ret = -EINVAL

mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

If ret Then Return ret

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