rte_eal_paging.h(3) DPDK rte_eal_paging.h(3) NAME rte_eal_paging.h SYNOPSIS #include <stdint.h> #include <rte_compat.h> Enumerations enum rte_mem_prot { RTE_PROT_READ = 1 << 0, RTE_PROT_WRITE = 1 << 1, RTE_PROT_EXECUTE = 1 << 2 } enum rte_map_flags { RTE_MAP_SHARED = 1 << 0, RTE_MAP_ANONYMOUS = 1 << 1, RTE_MAP_PRIVATE = 1 << 2, RTE_MAP_FORCE_ADDRESS = 1 << 3, RTE_MAP_FORCE_ADDRESS_NOREPLACE = 1 << 4 } Functions __rte_internal void * rte_mem_map (void *requested_addr, size_t size, int prot, int flags, int fd, uint64_t offset) __rte_internal int rte_mem_unmap (void *virt, size_t size) __rte_internal size_t rte_mem_page_size (void) __rte_internal int rte_mem_lock (const void *virt, size_t size) Enumeration Type Documentation enum rte_mem_prot Memory protection flags. Enumerator RTE_PROT_READ Read access. RTE_PROT_WRITE Write access. RTE_PROT_EXECUTE Code execution. Definition at line 20 of file rte_eal_paging.h. enum rte_map_flags Additional flags for memory mapping. Enumerator RTE_MAP_SHARED Changes to the mapped memory are visible to other processes. RTE_MAP_ANONYMOUS Mapping is not backed by a regular file. RTE_MAP_PRIVATE Copy-on-write mapping, changes are invisible to other processes. RTE_MAP_FORCE_ADDRESS Force mapping to the requested address. This flag should be used with caution, because to fulfill the request implementation may re- move all other mappings in the requested region. However, it is not required to do so, thus mapping with this flag may fail. RTE_MAP_FORCE_ADDRESS_NOREPLACE Force mapping to the requested address, but fail if a preexisting mapping collides with the request. Definition at line 27 of file rte_eal_paging.h. Function Documentation __rte_internal void * rte_mem_map (void * requested_addr, size_t size, int prot, int flags, int fd, uint64_t offset) Map a portion of an opened file or the page file into memory. This function is similar to POSIX mmap(3) with common MAP_ANONYMOUS exten- sion, except for the return value. Parameters requested_addr Desired virtual address for mapping. Can be NULL to let OS choose. size Size of the mapping in bytes. prot Protection flags, a combination of rte_mem_prot values. flags Additional mapping flags, a combination of rte_map_flags. fd Mapped file descriptor. Can be negative for anonymous mapping. offset Offset of the mapped region in fd. Must be 0 for anonymous map- pings. Returns Mapped address or NULL on failure and rte_errno is set to OS error. __rte_internal int rte_mem_unmap (void * virt, size_t size) OS-independent implementation of POSIX munmap(3). __rte_internal size_t rte_mem_page_size (void) Get system page size. This function never fails. Returns Page size in bytes. __rte_internal int rte_mem_lock (const void * virt, size_t size) Lock in physical memory all pages crossed by the address region. Parameters virt Base virtual address of the region. size Size of the region. Returns 0 on success, negative on error. See also rte_mem_page_size() to retrieve the page size. rte_mem_lock_page() to lock an entire single page. Author Generated automatically by Doxygen for DPDK from the source code. Version 25.11.0 Thu Aug 27 2026 rte_eal_paging.h(3)
NAME | SYNOPSIS | Enumeration Type Documentation | Function Documentation | Author
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