segment_manager.c File Reference

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Functions
segment_manager_properties_t *	segment_manager_properties_get (segment_manager_t *sm)
segment_manager_properties_t *	segment_manager_properties_init (segment_manager_properties_t *props)
static u8	segment_manager_app_detached (segment_manager_t *sm)
void	segment_manager_app_detach (segment_manager_t *sm)
static u32	segment_manager_segment_index (segment_manager_t *sm, svm_fifo_segment_private_t *seg)
void	segment_manager_del_segment (segment_manager_t *sm, svm_fifo_segment_private_t *fs)
	Remove segment without lock. More...
static void	segment_manager_lock_and_del_segment (segment_manager_t *sm, u32 fs_index)
	Removes segment after acquiring writer lock. 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...
void	segment_manager_segment_reader_unlock (segment_manager_t *sm)
void	segment_manager_segment_writer_unlock (segment_manager_t *sm)
int	segment_manager_add_segment (segment_manager_t *sm, u32 segment_size)
	Adds segment to segment manager's pool. More...
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...
u8	segment_manager_has_fifos (segment_manager_t *sm)
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)
int	segment_manager_try_alloc_fifos (svm_fifo_segment_private_t *fifo_segment, u32 rx_fifo_size, u32 tx_fifo_size, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo)
int	segment_manager_alloc_session_fifos (segment_manager_t *sm, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo, u32 *fifo_segment_index)
void	segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t *rx_fifo, svm_fifo_t *tx_fifo)
u32	segment_manager_evt_q_expected_size (u32 q_len)
svm_msg_q_t *	segment_manager_alloc_queue (svm_fifo_segment_private_t *segment, segment_manager_properties_t *props)
	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_main_init (segment_manager_main_init_args_t *a)
static clib_error_t *	segment_manager_show_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

Variables
segment_manager_main_t	segment_manager_main
static u32	segment_name_counter = 0
	Counter used to build segment names. More...
static u32	default_fifo_size = 1 << 12
	Default fifo and segment size. More...
static u32	default_segment_size = 1 << 20
static u32	default_app_evt_queue_size = 128
static vlib_cli_command_t	segment_manager_show_command
	(constructor) VLIB_CLI_COMMAND (segment_manager_show_command) More...

Function Documentation

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 154 of file segment_manager.c.

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svm_msg_q_t* segment_manager_alloc_queue	(	svm_fifo_segment_private_t *	segment,
		segment_manager_properties_t *	props
	)

Allocates shm queue in the first segment.

Must be called with lock held

Definition at line 625 of file segment_manager.c.

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int segment_manager_alloc_session_fifos	(	segment_manager_t *	sm,
		svm_fifo_t **	rx_fifo,
		svm_fifo_t **	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 58 of file segment_manager.c.

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static u8 segment_manager_app_detached ( segment_manager_t *  sm )

static

Definition at line 52 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 662 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 74 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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u32 segment_manager_evt_q_expected_size

(

u32

q_len

)

Definition at line 603 of file segment_manager.c.

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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 115 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 128 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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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 251 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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static void segment_manager_lock_and_del_segment ( segment_manager_t *  sm, u32  fs_index  )

inlinestatic

Removes segment after acquiring writer lock.

Definition at line 93 of file segment_manager.c.

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void segment_manager_main_init

(

segment_manager_main_init_args_t *

a

)

Definition at line 683 of file segment_manager.c.

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segment_manager_t* segment_manager_new

(

)

Definition at line 236 of file segment_manager.c.

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segment_manager_properties_t* segment_manager_properties_get

(

segment_manager_t *

sm

)

Definition at line 35 of file segment_manager.c.

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segment_manager_properties_t* segment_manager_properties_init

(

segment_manager_properties_t *

props

)

Definition at line 42 of file segment_manager.c.

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static u32 segment_manager_segment_index ( segment_manager_t *  sm, svm_fifo_segment_private_t *  seg  )

inlinestatic

Definition at line 64 of file segment_manager.c.

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void segment_manager_segment_reader_unlock

(

segment_manager_t *

sm

)

Definition at line 135 of file segment_manager.c.

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void segment_manager_segment_writer_unlock

(

segment_manager_t *

sm

)

Definition at line 142 of file segment_manager.c.

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static clib_error_t* segment_manager_show_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 695 of file segment_manager.c.

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int segment_manager_try_alloc_fifos	(	svm_fifo_segment_private_t *	fifo_segment,
		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

u32 default_app_evt_queue_size = 128

static

Definition at line 32 of file segment_manager.c.

u32 default_fifo_size = 1 << 12

static

Default fifo and segment size.

TODO config.

Definition at line 30 of file segment_manager.c.

u32 default_segment_size = 1 << 20

static

Definition at line 31 of file segment_manager.c.

segment_manager_main_t segment_manager_main

Definition at line 20 of file segment_manager.c.

vlib_cli_command_t segment_manager_show_command

static

Initial value:

=
{
  .path = "show segment-manager",
  .short_help = "show segment-manager [segments][verbose]",
  .function = segment_manager_show_fn,
}

(constructor) VLIB_CLI_COMMAND (segment_manager_show_command)

Definition at line 758 of file segment_manager.c.

u32 segment_name_counter = 0

static

Counter used to build segment names.

Definition at line 25 of file segment_manager.c.