cgroup_add_file

Name:cgroup_add_file

Proto:static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp, struct cftype *cft)

Type:int

Parameter:

Type	Parameter	Name
struct cgroup_subsys_state *	css
struct cgroup *	cgrp
struct cftype *	cft

3818

struct lock_class_key * key = NULL

3822

key = lockdep_key

3824

kn = __kernfs_create_file( cgroup kernfs entry , cgroup_file_name(cgrp, cft, name), group_file_mode - deduce file mode of a control file*@cft: the control file in question* S_IRUGO for read, S_IWUSR for write., GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, 0, kf_ops, cft, NULL, key)

3829

If IS_ERR(kn) Then Return PTR_ERR(kn)

3832

ret = set uid and gid of cgroup dirs and files to that of the creator

3833

If ret Then

3834

kernfs_remove(kn)

3835

Return ret

3838

If If non-zero, should contain the offset from the start of css to* a struct cgroup_file field. cgroup will record the handle of* the created file into it. The recorded handle can be used as* long as the containing css remains accessible. Then

3839

cfile = css + If non-zero, should contain the offset from the start of css to* a struct cgroup_file field. cgroup will record the handle of* the created file into it. The recorded handle can be used as* long as the containing css remains accessible.

3841

imer_setup - prepare a timer for first use*@timer: the timer in question*@callback: the function to call when timer expires*@flags: any TIMER_* flags* Regular timer initialization should use either DEFINE_TIMER() above,* or timer_setup()( & notify_timer, cgroup_file_notify_timer, 0)

3843

spin_lock_irq( & Protects cgroup_file->kn for !self csses. It synchronizes notifications* against file removal/re-creation across css hiding.)

3844

do not access any fields from outside cgroup core = kn

3845

spin_unlock_irq( & Protects cgroup_file->kn for !self csses. It synchronizes notifications* against file removal/re-creation across css hiding.)

3848

Return 0

**Caller**
Name	Describe
cgroup_addrm_files

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