189. Unit Tests: Mbuf

This is the test plan for the Intel® DPDK mbuf library.

189.1. Description

1. Allocate a mbuf pool.
   • The pool contains NB_MBUF elements, where each mbuf is MBUF_SIZE bytes long.
2. Test multiple allocations of mbufs from this pool.
   • Allocate NB_MBUF and store pointers in a table.
   • If an allocation fails, return an error.
   • Free all these mbufs.
   • Repeat the same test to check that mbufs were freed correctly.
3. Test data manipulation in pktmbuf.
   • Alloc an mbuf.
   • Append data using rte_pktmbuf_append().
   • Test for error in rte_pktmbuf_append() when len is too large.
   • Trim data at the end of mbuf using rte_pktmbuf_trim().
   • Test for error in rte_pktmbuf_trim() when len is too large.
   • Prepend a header using rte_pktmbuf_prepend().
   • Test for error in rte_pktmbuf_prepend() when len is too large.
   • Remove data at the beginning of mbuf using rte_pktmbuf_adj().
   • Test for error in rte_pktmbuf_adj() when len is too large.
   • Check that appended data is not corrupt.
   • Free the mbuf.
   • Between all these tests, check data_len and pkt_len, and that the mbuf is contiguous.
   • Repeat the test to check that allocation operations reinitialize the mbuf correctly.