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FD.io VPP
v21.10.1-2-g0a485f517
Vector Packet Processing
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FD.io VPP
v21.10.1-2-g0a485f517
Vector Packet Processing
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Include dependency graph for buffer.h: This graph shows which files directly or indirectly include this file:Go to the source code of this file.
Data Structures | |
| union | vlib_buffer_t |
| VLIB buffer representation. More... | |
| struct | vlib_buffer_pool_thread_t |
| struct | vlib_buffer_pool_t |
| struct | vlib_buffer_main_t |
Typedefs | |
| typedef u32() | vlib_buffer_alloc_free_callback_t(struct vlib_main_t *vm, u8 buffer_pool_index, u32 *buffers, u32 n_buffers) |
Enumerations | |
| enum | { foreach_vlib_buffer_flag } |
| enum | { foreach_vlib_buffer_flag } |
Functions | |
| STATIC_ASSERT_SIZEOF (vlib_buffer_t, 128+VLIB_BUFFER_TRACE_TRAJECTORY_SZ+VLIB_BUFFER_PRE_DATA_SIZE) | |
| STATIC_ASSERT (VLIB_BUFFER_PRE_DATA_SIZE % CLIB_CACHE_LINE_BYTES==0, "VLIB_BUFFER_PRE_DATA_SIZE must be divisible by cache line size") | |
| static void | vlib_buffer_struct_is_sane (vlib_buffer_t *b) |
| static uword | vlib_buffer_get_va (vlib_buffer_t *b) |
| static void * | vlib_buffer_get_current (vlib_buffer_t *b) |
| Get pointer to current data to process. More... | |
| static uword | vlib_buffer_get_current_va (vlib_buffer_t *b) |
| static void | vlib_buffer_advance (vlib_buffer_t *b, word l) |
| Advance current data pointer by the supplied (signed!) amount. More... | |
| static u8 | vlib_buffer_has_space (vlib_buffer_t *b, word l) |
| Check if there is enough space in buffer to advance. More... | |
| static void | vlib_buffer_reset (vlib_buffer_t *b) |
| Reset current header & length to state they were in when packet was received. More... | |
| static void * | vlib_get_buffer_opaque (vlib_buffer_t *b) |
| Get pointer to buffer's opaque data array. More... | |
| static void * | vlib_get_buffer_opaque2 (vlib_buffer_t *b) |
| Get pointer to buffer's opaque2 data array. More... | |
| static u8 * | vlib_buffer_get_tail (vlib_buffer_t *b) |
| Get pointer to the end of buffer's data. More... | |
| static void * | vlib_buffer_put_uninit (vlib_buffer_t *b, u16 size) |
| Append uninitialized data to buffer. More... | |
| static void * | vlib_buffer_push_uninit (vlib_buffer_t *b, u8 size) |
| Prepend uninitialized data to buffer. More... | |
| static void * | vlib_buffer_make_headroom (vlib_buffer_t *b, u8 size) |
| Make head room, typically for packet headers. More... | |
| static u32 | vlib_buffer_make_trace_handle (u32 thread, u32 pool_index) |
| Construct a trace handle from thread and pool index. More... | |
| static u32 | vlib_buffer_get_trace_thread (vlib_buffer_t *b) |
| Extract the thread id from a trace handle. More... | |
| static u32 | vlib_buffer_get_trace_index (vlib_buffer_t *b) |
| Extract the trace (pool) index from a trace handle. More... | |
| static void * | vlib_buffer_pull (vlib_buffer_t *b, u8 size) |
| Retrieve bytes from buffer head. More... | |
| clib_error_t * | vlib_buffer_main_init (struct vlib_main_t *vm) |
| int | vlib_buffer_set_alloc_free_callback (struct vlib_main_t *vm, vlib_buffer_alloc_free_callback_t *alloc_callback_fn, vlib_buffer_alloc_free_callback_t *free_callback_fn) |
Variables | |
| format_function_t | format_vlib_buffer_pool_all |
vlib buffer structure definition and a few select access methods. This structure and the buffer allocation mechanism should perhaps live in vnet, but it would take a lot of typing to make it so.
Definition in file buffer.h.
| foreach_vlib_buffer_flag |
| #define VLIB_BUFFER_FLAG_USER | ( | n | ) | (1 << LOG2_VLIB_BUFFER_FLAG_USER(n)) |
| #define VLIB_BUFFER_HDR_SIZE (sizeof(vlib_buffer_t) - VLIB_BUFFER_PRE_DATA_SIZE) |
| #define VLIB_BUFFER_SET_EXT_HDR_SIZE | ( | x | ) |
| #define VLIB_BUFFER_TRACE_TRAJECTORY 0 |
| #define vlib_prefetch_buffer_data | ( | b, | |
| type | |||
| ) | CLIB_PREFETCH (vlib_buffer_get_current(b), CLIB_CACHE_LINE_BYTES, type) |
| #define vlib_prefetch_buffer_header | ( | b, | |
| type | |||
| ) | CLIB_PREFETCH (b, 64, type) |
Prefetch buffer metadata.
The first 64 bytes of buffer contains most header information
| b | - (vlib_buffer_t *) pointer to the buffer |
| type | - LOAD, STORE. In most cases, STORE is the right answer |
| STATIC_ASSERT | ( | VLIB_BUFFER_PRE_DATA_SIZE % | CLIB_CACHE_LINE_BYTES = =0, |
| "VLIB_BUFFER_PRE_DATA_SIZE must be divisible by cache line size" | |||
| ) |
| STATIC_ASSERT_SIZEOF | ( | vlib_buffer_t | , |
| 128+VLIB_BUFFER_TRACE_TRAJECTORY_SZ+ | VLIB_BUFFER_PRE_DATA_SIZE | ||
| ) |
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Advance current data pointer by the supplied (signed!) amount.
| b | - (vlib_buffer_t *) pointer to the buffer |
| l | - (word) signed increment |
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Get pointer to current data to process.
| b | - (vlib_buffer_t *) pointer to the buffer |
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Check if there is enough space in buffer to advance.
| b | - (vlib_buffer_t *) pointer to the buffer |
| l | - (word) size to check |
Definition at line 293 of file buffer.h.
Here is the caller graph for this function:| clib_error_t* vlib_buffer_main_init | ( | struct vlib_main_t * | vm | ) |
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Reset current header & length to state they were in when packet was received.
| b | - (vlib_buffer_t *) pointer to the buffer |
Definition at line 305 of file buffer.h.
Here is the caller graph for this function:| int vlib_buffer_set_alloc_free_callback | ( | struct vlib_main_t * | vm, |
| vlib_buffer_alloc_free_callback_t * | alloc_callback_fn, | ||
| vlib_buffer_alloc_free_callback_t * | free_callback_fn | ||
| ) |
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Get pointer to buffer's opaque data array.
| b | - (vlib_buffer_t *) pointer to the buffer |
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Get pointer to buffer's opaque2 data array.
| b | - (vlib_buffer_t *) pointer to the buffer |
| format_function_t format_vlib_buffer_pool_all |
1.8.17