segment_manager.h File Reference

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Data Structures
struct	segment_manager_main_
struct	segment_manager_main_init_args_

Macros
#define	segment_manager_foreach_segment_w_lock(VAR, SM, BODY)
#define	SEGMENT_MANAGER_INVALID_APP_INDEX   ((u32) ~0)

Typedefs
typedef struct _segment_manager_properties	segment_manager_properties_t
typedef struct _segment_manager	segment_manager_t
typedef struct segment_manager_main_	segment_manager_main_t
typedef struct segment_manager_main_init_args_	segment_manager_main_init_args_t

Functions
static segment_manager_t *	segment_manager_get (u32 index)
static segment_manager_t *	segment_manager_get_if_valid (u32 index)
static u32	segment_manager_index (segment_manager_t *sm)
static svm_queue_t *	segment_manager_event_queue (segment_manager_t *sm)
segment_manager_t *	segment_manager_new ()
int	segment_manager_init (segment_manager_t *sm, u32 first_seg_size, u32 prealloc_fifo_pairs)
	Initializes segment manager based on options provided. More...
svm_fifo_segment_private_t *	segment_manager_get_segment (segment_manager_t *sm, u32 segment_index)
	Reads a segment from the segment manager's pool without lock. More...
svm_fifo_segment_private_t *	segment_manager_get_segment_w_lock (segment_manager_t *sm, u32 segment_index)
	Reads a segment from the segment manager's pool and acquires reader lock. More...
int	segment_manager_add_segment (segment_manager_t *sm, u32 segment_size)
	Adds segment to segment manager's pool. More...
void	segment_manager_del_segment (segment_manager_t *sm, svm_fifo_segment_private_t *fs)
	Remove segment without lock. More...
void	segment_manager_segment_reader_unlock (segment_manager_t *sm)
void	segment_manager_segment_writer_unlock (segment_manager_t *sm)
int	segment_manager_add_first_segment (segment_manager_t *sm, u32 segment_size)
void	segment_manager_del_sessions (segment_manager_t *sm)
	Initiate disconnects for all sessions 'owned' by a segment manager. More...
void	segment_manager_del (segment_manager_t *sm)
	Removes segment manager. More...
void	segment_manager_init_del (segment_manager_t *sm)
u8	segment_manager_has_fifos (segment_manager_t *sm)
int	segment_manager_alloc_session_fifos (segment_manager_t *sm, svm_fifo_t **server_rx_fifo, svm_fifo_t **server_tx_fifo, u32 *fifo_segment_index)
int	segment_manager_try_alloc_fifos (svm_fifo_segment_private_t *fs, u32 rx_fifo_size, u32 tx_fifo_size, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo)
void	segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t *rx_fifo, svm_fifo_t *tx_fifo)
svm_queue_t *	segment_manager_alloc_queue (svm_fifo_segment_private_t *fs, u32 queue_size)
	Allocates shm queue in the first segment. More...
void	segment_manager_dealloc_queue (segment_manager_t *sm, svm_queue_t *q)
	Frees shm queue allocated in the first segment. More...
void	segment_manager_app_detach (segment_manager_t *sm)
void	segment_manager_main_init (segment_manager_main_init_args_t *a)
segment_manager_properties_t *	segment_manager_properties_init (segment_manager_properties_t *sm)

Variables
segment_manager_main_t	segment_manager_main
segment_manager_t *	segment_managers
	Pool of segment managers. More...

Macro Definition Documentation

#define segment_manager_foreach_segment_w_lock	(		VAR,
			SM,
			BODY
	)

Value:

do {                                                                    \
    clib_rwlock_reader_lock (&(SM)->segments_rwlock);                   \
    pool_foreach((VAR), ((SM)->segments), (BODY));                      \
    clib_rwlock_reader_unlock (&(SM)->segments_rwlock);                 \
} while (0)

Definition at line 67 of file segment_manager.h.

#define SEGMENT_MANAGER_INVALID_APP_INDEX   ((u32) ~0)

Definition at line 92 of file segment_manager.h.

Typedef Documentation

typedef struct segment_manager_main_init_args_ segment_manager_main_init_args_t

typedef struct segment_manager_main_ segment_manager_main_t

typedef struct _segment_manager_properties segment_manager_properties_t

typedef struct _segment_manager segment_manager_t

Function Documentation

int segment_manager_add_first_segment	(	segment_manager_t *	sm,
		u32	segment_size
	)

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int segment_manager_add_segment	(	segment_manager_t *	sm,
		u32	segment_size
	)

Adds segment to segment manager's pool.

If needed a writer's lock is acquired before allocating a new segment to avoid affecting any of the segments pool readers.

Definition at line 153 of file segment_manager.c.

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svm_queue_t* segment_manager_alloc_queue	(	svm_fifo_segment_private_t *	segment,
		u32	queue_size
	)

Allocates shm queue in the first segment.

Must be called with lock held

Definition at line 606 of file segment_manager.c.

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int segment_manager_alloc_session_fifos	(	segment_manager_t *	sm,
		svm_fifo_t **	server_rx_fifo,
		svm_fifo_t **	server_tx_fifo,
		u32 *	fifo_segment_index
	)

Definition at line 478 of file segment_manager.c.

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void segment_manager_app_detach

(

segment_manager_t *

sm

)

Definition at line 57 of file segment_manager.c.

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void segment_manager_dealloc_fifos	(	u32	segment_index,
		svm_fifo_t *	rx_fifo,
		svm_fifo_t *	tx_fifo
	)

Definition at line 560 of file segment_manager.c.

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void segment_manager_dealloc_queue	(	segment_manager_t *	sm,
		svm_queue_t *	q
	)

Frees shm queue allocated in the first segment.

Definition at line 627 of file segment_manager.c.

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void segment_manager_del

(

segment_manager_t *

sm

)

Removes segment manager.

Since the fifos allocated in the segment keep backpointers to the sessions prior to removing the segment, we call session disconnect. This subsequently propagates into transport.

Definition at line 398 of file segment_manager.c.

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void segment_manager_del_segment	(	segment_manager_t *	sm,
		svm_fifo_segment_private_t *	fs
	)

Remove segment without lock.

Definition at line 73 of file segment_manager.c.

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void segment_manager_del_sessions

(

segment_manager_t *

sm

)

Initiate disconnects for all sessions 'owned' by a segment manager.

Definition at line 349 of file segment_manager.c.

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static svm_queue_t* segment_manager_event_queue ( segment_manager_t *  sm )

inlinestatic

Definition at line 118 of file segment_manager.h.

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static segment_manager_t* segment_manager_get ( u32  index )

inlinestatic

Definition at line 98 of file segment_manager.h.

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static segment_manager_t* segment_manager_get_if_valid ( u32  index )

inlinestatic

Definition at line 104 of file segment_manager.h.

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svm_fifo_segment_private_t* segment_manager_get_segment	(	segment_manager_t *	sm,
		u32	segment_index
	)

Reads a segment from the segment manager's pool without lock.

Definition at line 114 of file segment_manager.c.

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svm_fifo_segment_private_t* segment_manager_get_segment_w_lock	(	segment_manager_t *	sm,
		u32	segment_index
	)

Reads a segment from the segment manager's pool and acquires reader lock.

Caller must drop the reader's lock by calling segment_manager_segment_reader_unlock once it finishes working with the segment.

Definition at line 127 of file segment_manager.c.

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u8 segment_manager_has_fifos

(

segment_manager_t *

sm

)

Definition at line 320 of file segment_manager.c.

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static u32 segment_manager_index ( segment_manager_t *  sm )

inlinestatic

Definition at line 112 of file segment_manager.h.

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int segment_manager_init	(	segment_manager_t *	sm,
		u32	first_seg_size,
		u32	prealloc_fifo_pairs
	)

Initializes segment manager based on options provided.

Returns error if ssvm segment(s) allocation fails.

Definition at line 248 of file segment_manager.c.

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void segment_manager_init_del

(

segment_manager_t *

sm

)

Definition at line 427 of file segment_manager.c.

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void segment_manager_main_init

(

segment_manager_main_init_args_t *

a

)

Definition at line 648 of file segment_manager.c.

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segment_manager_t* segment_manager_new

(

)

Definition at line 233 of file segment_manager.c.

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segment_manager_properties_t* segment_manager_properties_init

(

segment_manager_properties_t *

sm

)

Definition at line 41 of file segment_manager.c.

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void segment_manager_segment_reader_unlock

(

segment_manager_t *

sm

)

Definition at line 134 of file segment_manager.c.

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void segment_manager_segment_writer_unlock

(

segment_manager_t *

sm

)

Definition at line 141 of file segment_manager.c.

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int segment_manager_try_alloc_fifos	(	svm_fifo_segment_private_t *	fs,
		u32	rx_fifo_size,
		u32	tx_fifo_size,
		svm_fifo_t **	rx_fifo,
		svm_fifo_t **	tx_fifo
	)

Definition at line 440 of file segment_manager.c.

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Variable Documentation

segment_manager_main_t segment_manager_main

Definition at line 20 of file segment_manager.c.

segment_manager_t* segment_managers

Pool of segment managers.