cgroup1_get_tree

Name:cgroup1_get_tree

Proto:int cgroup1_get_tree(struct fs_context *fc)

Type:int

Parameter:

Type	Parameter	Name
struct fs_context *	fc

1204

ctx = cgroup_fc2context(fc)

1208

If Not ns_capable(user_ns, Allow setting zone reclaim policy ) Then Return -EPERM

1211

group_lock_and_drain_offline - lock cgroup_mutex and drain offlined csses*@cgrp: root of the target subtree* Because css offlining is asynchronous, userland may try to re-enable a* controller while the previous css is still around. This function grabs

1213

ret = The guts of cgroup1 mount - find or create cgroup_root to use

1214

If Not ret && Not percpu_ref_tryget_live - try to increment a live percpu refcount*@ref: percpu_ref to try-get* Increment a percpu refcount unless it has already been killed Then ret = 1

1217

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.

1219

If Not ret Then ret = cgroup_do_get_tree(fc)

1222

If Not ret && percpu_ref_is_dying - test whether a percpu refcount is dying or dead*@ref: percpu_ref to test* Returns %true if @ref is dying or dead.* This function is safe to call as long as @ref is between init and exit Then

1223

sb = d_sb

1224

1225

deactivate_locked_super - drop an active reference to superblock*@s: superblock to deactivate* Drops an active reference to superblock, converting it into a temporary* one if there is no other active references left

1226

ret = 1

1229

If Value for the false possibility is greater at compile time(ret > 0) Then

1230

msleep - sleep safely even with waitqueue interruptions*@msecs: Time in milliseconds to sleep for

1231

Return restart_syscall()

1233

Return ret

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