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Vector Packet Processing
segment_manager.c File Reference
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Functions

segment_manager_properties_tsegment_manager_properties_get (segment_manager_t *sm)
 
segment_manager_properties_tsegment_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_tsegment_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_tsegment_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_tsegment_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)
 
svm_queue_tsegment_manager_alloc_queue (svm_fifo_segment_private_t *segment, 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_main_init (segment_manager_main_init_args_t *a)
 
static clib_error_tsegment_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 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 **  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 57 of file segment_manager.c.

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static u8 segment_manager_app_detached ( segment_manager_t sm)
static

Definition at line 51 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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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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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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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 92 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_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 41 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 63 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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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 660 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]",
}
static clib_error_t * segment_manager_show_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

(constructor) VLIB_CLI_COMMAND (segment_manager_show_command)

Definition at line 723 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.