fsnotify_alloc_group

Name:Create a new fsnotify_group and hold a reference for the group returned.

Proto:struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)

Type:struct fsnotify_group

Parameter:

Type	Parameter	Name
const struct fsnotify_ops *	ops

120

group = kzalloc - allocate memory. The memory is set to zero.*@size: how many bytes of memory are required.*@flags: the type of memory to allocate (see kmalloc).

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If Not group Then Return ERR_PTR( - ENOMEM)

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_set - set a refcount's value*@r: the refcount*@n: value to which the refcount will be set

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atomic_set( & 1 for each mark and 1 for not being * past the point of no return when freeing * a group , 0)

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atomic_set( & Number of tasks waiting for user * response , 0)

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Process spin lock initialization( & protect the notification_list )

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Initialization list head

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init_waitqueue_head( & read() on the notification file blocks on this waitq )

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maximum events allowed on the list = UINT_MAX

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mutex_init - initialize the mutex*@mutex: the mutex to be initialized* Initialize the mutex to unlocked state.* It is not allowed to initialize an already locked mutex.( & protect marks_list )

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Initialization list head

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how this group handles things = ops

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Return group

**Caller**
Name	Describe
audit_watch_init
audit_fsnotify_init
audit_tree_init
dnotify_init
inotify_new_group
SYSCALL_DEFINE2	anotify syscalls

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