Core Packet Buffer Operations

Allocating Packet Buffers

struct rte_mbuf *allocate_packet_buffer(struct rte_mempool *pool);

• pool: Memory pool for buffer alocation

Example usage:

struct rte_mempool *buffer_pool;
struct rte_mbuf *packet = allocate_packet_buffer(buffer_pool);
if (!packet) {
    printf("Buffer allocation failed\n");
    return -1;
}

Releasing Packet Buffers

void release_packet_buffer(struct rte_mbuf *packet);

Buffer Cloning

struct rte_mbuf *clone_buffer(const struct rte_mbuf *original, struct rte_mempool *pool);

Advanced Buffer Manipulation

External Buffer Attachment

void attach_external_buffer(struct rte_mbuf *packet, void *data_ptr, 
                          rte_iova_t phys_addr, uint16_t length);

Data Segment Management

struct rte_mbuf *prepend_data(struct rte_mbuf *packet, uint16_t length);
struct rte_mbuf *trim_data(struct rte_mbuf *packet, uint16_t length);

Buffer Information Queries

Packet Length Information

uint32_t get_total_packet_length(const struct rte_mbuf *packet);
uint16_t get_data_length(const struct rte_mbuf *packet);

Memory Layout Information

uint16_t get_headroom(const struct rte_mbuf *packet);
uint16_t get_tailroom(const struct rte_mbuf *packet);

Bulk Operations

Batch Allocation

unsigned int allocate_multiple_buffers(struct rte_mempool *pool, 
                                     struct rte_mbuf **buffers, 
                                     unsigned int count);

Batch Release

void release_multiple_buffers(struct rte_mbuf **buffers, unsigned int count);

Specialized Operations

Buffer Linearization

int make_buffer_contiguous(struct rte_mbuf *packet);

Physical Address Access

phys_addr_t get_physical_address(const struct rte_mbuf *packet);