From: Bill Fischofer <bill.fischo...@linaro.org> Add code to initialize and maintain unshared_len packet metadata
Signed-off-by: Bill Fischofer <bill.fischo...@linaro.org> --- /** Email created from pull request 90 (Bill-Fischofer-Linaro:pktrefs) ** https://github.com/Linaro/odp/pull/90 ** Patch: https://github.com/Linaro/odp/pull/90.patch ** Base sha: bb0ca193f8c28036fdf8b3d6c8aa5d4f11980e6c ** Merge commit sha: dfef320840f96825686124135a6e509db80b7b82 **/ .../linux-generic/include/odp_packet_internal.h | 5 +++ platform/linux-generic/odp_packet.c | 40 ++++++++++++++++------ 2 files changed, 35 insertions(+), 10 deletions(-) diff --git a/platform/linux-generic/include/odp_packet_internal.h b/platform/linux-generic/include/odp_packet_internal.h index 2207ac58..1edb5b7d 100644 --- a/platform/linux-generic/include/odp_packet_internal.h +++ b/platform/linux-generic/include/odp_packet_internal.h @@ -19,6 +19,7 @@ extern "C" { #include <odp/api/align.h> #include <odp/api/debug.h> +#include <odp_debug_internal.h> #include <odp_buffer_internal.h> #include <odp_pool_internal.h> #include <odp_buffer_inlines.h> @@ -250,6 +251,7 @@ static inline void pull_tail(odp_packet_hdr_t *pkt_hdr, uint32_t len) pkt_hdr->tailroom += len; pkt_hdr->frame_len -= len; + pkt_hdr->unshared_len -= len; pkt_hdr->buf_hdr.seg[last].len -= len; } @@ -279,7 +281,10 @@ static inline void packet_ref_count_set(odp_packet_hdr_t *pkt_hdr, uint32_t n) static inline void packet_set_len(odp_packet_hdr_t *pkt_hdr, uint32_t len) { + ODP_ASSERT(packet_ref_count(pkt_hdr) == 1); + pkt_hdr->frame_len = len; + pkt_hdr->unshared_len = len; } /* Forward declarations */ diff --git a/platform/linux-generic/odp_packet.c b/platform/linux-generic/odp_packet.c index 41262cc2..5e1b4f8c 100644 --- a/platform/linux-generic/odp_packet.c +++ b/platform/linux-generic/odp_packet.c @@ -152,6 +152,7 @@ static inline void push_head(odp_packet_hdr_t *pkt_hdr, uint32_t len) { pkt_hdr->headroom -= len; pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; pkt_hdr->buf_hdr.seg[0].data -= len; pkt_hdr->buf_hdr.seg[0].len += len; } @@ -160,6 +161,7 @@ static inline void pull_head(odp_packet_hdr_t *pkt_hdr, uint32_t len) { pkt_hdr->headroom += len; pkt_hdr->frame_len -= len; + pkt_hdr->unshared_len -= len; pkt_hdr->buf_hdr.seg[0].data += len; pkt_hdr->buf_hdr.seg[0].len -= len; } @@ -170,6 +172,7 @@ static inline void push_tail(odp_packet_hdr_t *pkt_hdr, uint32_t len) pkt_hdr->tailroom -= len; pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; pkt_hdr->buf_hdr.seg[last].len += len; } @@ -197,6 +200,10 @@ static inline void packet_seg_copy_md(odp_packet_hdr_t *dst, dst->buf_hdr.uarea_addr = src->buf_hdr.uarea_addr; dst->buf_hdr.uarea_size = src->buf_hdr.uarea_size; + /* reference related metadata */ + dst->ref_len = src->ref_len; + dst->unshared_len = src->unshared_len; + /* segmentation data is not copied: * buf_hdr.seg[] * buf_hdr.segcount @@ -396,9 +403,10 @@ static inline odp_packet_hdr_t *add_segments(odp_packet_hdr_t *pkt_hdr, new_hdr->buf_hdr.seg[0].len = seg_len; packet_seg_copy_md(new_hdr, pkt_hdr); - new_hdr->frame_len = pkt_hdr->frame_len + len; - new_hdr->headroom = pool->headroom + offset; - new_hdr->tailroom = pkt_hdr->tailroom; + new_hdr->frame_len = pkt_hdr->frame_len + len; + new_hdr->unshared_len = pkt_hdr->unshared_len + len; + new_hdr->headroom = pool->headroom + offset; + new_hdr->tailroom = pkt_hdr->tailroom; pkt_hdr = new_hdr; } else { @@ -411,8 +419,9 @@ static inline odp_packet_hdr_t *add_segments(odp_packet_hdr_t *pkt_hdr, last = packet_last_seg(pkt_hdr); pkt_hdr->buf_hdr.seg[last].len = seg_len; - pkt_hdr->frame_len += len; - pkt_hdr->tailroom = pool->tailroom + offset; + pkt_hdr->frame_len += len; + pkt_hdr->unshared_len += len; + pkt_hdr->tailroom = pool->tailroom + offset; } return pkt_hdr; @@ -450,9 +459,10 @@ static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, packet_seg_copy_md(new_hdr, pkt_hdr); /* Tailroom not changed */ - new_hdr->tailroom = pkt_hdr->tailroom; - new_hdr->headroom = seg_headroom(new_hdr, 0); - new_hdr->frame_len = pkt_hdr->frame_len - free_len; + new_hdr->tailroom = pkt_hdr->tailroom; + new_hdr->headroom = seg_headroom(new_hdr, 0); + new_hdr->frame_len = pkt_hdr->frame_len - free_len; + new_hdr->unshared_len = pkt_hdr->unshared_len - free_len; pull_head(new_hdr, pull_len); @@ -467,6 +477,7 @@ static inline odp_packet_hdr_t *free_segments(odp_packet_hdr_t *pkt_hdr, * of the metadata. */ pkt_hdr->buf_hdr.segcount = num_remain; pkt_hdr->frame_len -= free_len; + pkt_hdr->unshared_len -= free_len; pkt_hdr->tailroom = seg_tailroom(pkt_hdr, num_remain - 1); pull_tail(pkt_hdr, pull_len); @@ -912,6 +923,7 @@ int odp_packet_extend_head(odp_packet_t *pkt, uint32_t len, pkt_hdr->buf_hdr.segcount = segs; pkt_hdr->frame_len = frame_len; + pkt_hdr->unshared_len = frame_len; pkt_hdr->headroom = offset + pool->headroom; pkt_hdr->tailroom = pool->tailroom; @@ -953,6 +965,8 @@ void *odp_packet_pull_head(odp_packet_t pkt, uint32_t len) if (len > pkt_hdr->frame_len) return NULL; + ODP_ASSERT(len <= pkt_hdr->unshared_len); + pull_head(pkt_hdr, len); return packet_data(pkt_hdr); } @@ -1319,6 +1333,8 @@ int odp_packet_add_data(odp_packet_t *pkt_ptr, uint32_t offset, uint32_t len) if (offset > pktlen) return -1; + ODP_ASSERT(odp_packet_unshared_len(*pkt_ptr) >= offset); + newpkt = odp_packet_alloc(pool->pool_hdl, pktlen + len); if (newpkt == ODP_PACKET_INVALID) @@ -1439,8 +1455,9 @@ int odp_packet_concat(odp_packet_t *dst, odp_packet_t src) add_all_segs(dst_hdr, src_hdr); - dst_hdr->frame_len = dst_len + src_len; - dst_hdr->tailroom = src_hdr->tailroom; + dst_hdr->frame_len = dst_len + src_len; + dst_hdr->unshared_len = dst_len + src_len; + dst_hdr->tailroom = src_hdr->tailroom; /* Data was not moved in memory */ return 0; @@ -1453,6 +1470,7 @@ int odp_packet_split(odp_packet_t *pkt, uint32_t len, odp_packet_t *tail) if (len >= pktlen || tail == NULL) return -1; + ODP_ASSERT(odp_packet_unshared_len(*pkt) >= len); *tail = odp_packet_copy_part(*pkt, len, pktlen - len, odp_packet_pool(*pkt)); @@ -1538,6 +1556,8 @@ int odp_packet_copy_from_mem(odp_packet_t pkt, uint32_t offset, if (offset + len > pkt_hdr->frame_len) return -1; + ODP_ASSERT(odp_packet_unshared_len(pkt) >= offset + len); + while (len > 0) { mapaddr = packet_map(pkt_hdr, offset, &seglen, NULL); cpylen = len > seglen ? seglen : len;
