/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Copyright 2014, 2015 Tobias Klauser. * Subject to the GPL, version 2. */ #ifndef RING_H #define RING_H /* * "I love the smell of 10GbE in the morning. Smells like ... victory." * - W. Richard Stevens, "Secret Teachings of the UNIX Environment" */ #include #include #include #include #include #include #include #include #include "built_in.h" #include "die.h" #include "dev.h" #include "config.h" #ifndef POLLRDNORM # define POLLRDNORM 0x0040 #endif union tpacket_uhdr { struct tpacket_hdr *h1; struct tpacket2_hdr *h2; #ifdef HAVE_TPACKET3 struct tpacket3_hdr *h3; #endif void *raw; }; #ifdef HAVE_TPACKET3 #define tpacket_uhdr(hdr, member, v3) \ ((v3) ? ((hdr).h3)->member : ((hdr).h2)->member) #else #define tpacket_uhdr(hdr, member, v3) \ (((hdr).h2)->member) #endif /* HAVE_TPACKET3 */ static inline uint16_t tpacket_uhdr_vlan_tci(union tpacket_uhdr *hdr __maybe_unused, bool v3 __maybe_unused) { #ifdef HAVE_TPACKET3 if (v3) return hdr->h3->hv1.tp_vlan_tci; #endif return 0; } static inline uint16_t tpacket_uhdr_vlan_proto(union tpacket_uhdr *hdr __maybe_unused, bool v3 __maybe_unused) { #if defined(HAVE_TPACKET3) && defined(TP_STATUS_VLAN_TPID_VALID) if (v3) return hdr->h3->hv1.tp_vlan_tpid; #endif return 0; } static inline bool tpacket_has_vlan_info(union tpacket_uhdr *hdr) { uint32_t valid = 0; #ifdef TP_STATUS_VLAN_VALID valid |= TP_STATUS_VLAN_VALID; #endif #ifdef TP_STATUS_VLAN_TPID_VALID valid |= TP_STATUS_VLAN_TPID_VALID; #endif return tpacket_uhdr(*hdr, tp_status, true) & valid; } struct frame_map { struct tpacket2_hdr tp_h __aligned_tpacket; struct sockaddr_ll s_ll __align_tpacket(sizeof(struct tpacket2_hdr)); }; #ifdef HAVE_TPACKET3 struct block_desc { uint32_t version; uint32_t offset_to_priv; struct tpacket_hdr_v1 h1; }; #endif struct ring { struct iovec *frames; uint8_t *mm_space; size_t mm_len; struct sockaddr_ll s_ll; union { struct tpacket_req layout; #ifdef HAVE_TPACKET3 struct tpacket_req3 layout3; #endif uint8_t raw; }; }; static inline void next_rnd_slot(unsigned int *it, struct ring *ring) { *it = rand() % ring->layout.tp_frame_nr; } static inline size_t ring_size(const char *ifname, size_t size) { if (size > 0) return size; /* * Device bitrate in bytes times two as ring size. * Fallback => ~ 64,00 MB * 10 MBit => ~ 2,38 MB * 54 MBit => ~ 12,88 MB * 100 MBit => ~ 23,84 MB * 300 MBit => ~ 71,52 MB * 1.000 MBit => ~ 238,42 MB * 10.000 MBit => ~ 2.384.18 MB */ size = device_bitrate(ifname); size = (size * 1000000) / 8; size = size * 2; if (size == 0) size = 1 << 26; return round_up_cacheline(size); } static inline unsigned int ring_frame_size(struct ring *ring) { return ring->layout.tp_frame_size; } static inline void ring_verify_layout(struct ring *ring) { bug_on(ring->layout.tp_block_size < ring->layout.tp_frame_size); bug_on((ring->layout.tp_block_size % ring->layout.tp_frame_size) != 0); bug_on((ring->layout.tp_block_size % RUNTIME_PAGE_SIZE) != 0); } static inline void shrink_ring_layout_generic(struct ring *ring) { ring->layout.tp_block_nr >>= 1; ring->layout.tp_frame_nr = ring->layout.tp_block_size / ring->layout.tp_frame_size * ring->layout.tp_block_nr; } static inline void tpacket_hdr_clone(struct tpacket2_hdr *thdrd, struct tpacket2_hdr *thdrs) { thdrd->tp_sec = thdrs->tp_sec; thdrd->tp_nsec = thdrs->tp_nsec; thdrd->tp_snaplen = thdrs->tp_snaplen; thdrd->tp_len = thdrs->tp_len; } static inline void prepare_polling(int sock, struct pollfd *pfd) { memset(pfd, 0, sizeof(*pfd)); pfd->fd = sock; pfd->revents = 0; pfd->events = POLLIN | POLLRDNORM | POLLERR; } static inline void __set_sockopt_tpacket(int sock, int val) { int ret = setsockopt(sock, SOL_PACKET, PACKET_VERSION, &val, sizeof(val)); if (ret) panic("Cannot set tpacketv2!\n"); } static inline void set_sockopt_tpacket_v2(int sock) { __set_sockopt_tpacket(sock, TPACKET_V2); } #ifdef HAVE_TPACKET3 static inline void set_sockopt_tpacket_v3(int sock) { __set_sockopt_tpacket(sock, TPACKET_V3); } #else static inline void set_sockopt_tpacket_v3(int sock __maybe_unused) { } #endif static inline int get_sockopt_tpacket(int sock) { int val, ret; socklen_t len = sizeof(val); ret = getsockopt(sock, SOL_PACKET, PACKET_VERSION, &val, &len); if (ret) panic("Cannot get tpacket version!\n"); return val; } extern void setup_ring_layout_generic(struct ring *ring, size_t size, bool jumbo_support); extern void mmap_ring_generic(int sock, struct ring *ring); extern void alloc_ring_frames_generic(struct ring *ring, size_t num, size_t size); extern void bind_ring_generic(int sock, struct ring *ring, int ifindex, bool tx_only); #endif /* RING_H */ f='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&id=167451efb53c7999fb72591c46f29de09cd8f8b0'>167451efb53c7999fb72591c46f29de09cd8f8b0 (diff)
f2fs: support async discard
Like most filesystems, f2fs will issue discard command synchronously, so when user trigger fstrim through ioctl, multiple discard commands will be issued serially with sync mode, which makes poor performance. In this patch we try to support async discard, so that all discard commands can be issued and be waited for endio in batch to improve performance. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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