/* * netsniff-ng - the packet sniffing beast * Copyright 2011 - 2013 Daniel Borkmann. * Subject to the GPL, version 2. */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include "pcap_io.h" #include "built_in.h" #include "ioops.h" #include "iosched.h" static size_t map_size = 0; static char *ptr_va_start, *ptr_va_curr; static void __pcap_mmap_write_need_remap(int fd) { int ret; off_t pos, map_size_old = map_size; off_t offset = ptr_va_curr - ptr_va_start; map_size = PAGE_ALIGN(map_size_old * 10 / 8); pos = lseek(fd, map_size, SEEK_SET); if (pos < 0) panic("Cannot lseek pcap file!\n"); ret = write_or_die(fd, "", 1); if (ret != 1) panic("Cannot write file!\n"); ptr_va_start = mremap(ptr_va_start, map_size_old, map_size, MREMAP_MAYMOVE); if (ptr_va_start == MAP_FAILED) panic("mmap of file failed!"); ret = madvise(ptr_va_start, map_size, MADV_SEQUENTIAL); if (ret < 0) panic("Failed to give kernel mmap advise!\n"); ptr_va_curr = ptr_va_start + offset; } static ssize_t pcap_mm_write(int fd, pcap_pkthdr_t *phdr, enum pcap_type type, const uint8_t *packet, size_t len) { size_t hdrsize = pcap_get_hdr_length(phdr, type); if ((off_t) (ptr_va_curr - ptr_va_start) + hdrsize + len > map_size) __pcap_mmap_write_need_remap(fd); fmemcpy(ptr_va_curr, &phdr->raw, hdrsize); ptr_va_curr += hdrsize; fmemcpy(ptr_va_curr, packet, len); ptr_va_curr += len; return hdrsize + len; } static ssize_t pcap_mm_read(int fd, pcap_pkthdr_t *phdr, enum pcap_type type, uint8_t *packet, size_t len) { size_t hdrsize = pcap_get_hdr_length(phdr, type), hdrlen; if (unlikely((off_t) (ptr_va_curr + hdrsize - ptr_va_start) > map_size)) return -EIO; fmemcpy(&phdr->raw, ptr_va_curr, hdrsize); ptr_va_curr += hdrsize; hdrlen = pcap_get_length(phdr, type); if (unlikely((off_t) (ptr_va_curr + hdrlen - ptr_va_start) > map_size)) return -EIO; if (unlikely(hdrlen == 0 || hdrlen > len)) return -EINVAL; fmemcpy(packet, ptr_va_curr, hdrlen); ptr_va_curr += hdrlen; return hdrsize + hdrlen; } static inline off_t ____get_map_size(bool jumbo) { int allocsz = jumbo ? 16 : 3; return PAGE_ALIGN(sizeof(struct pcap_filehdr) + (PAGE_SIZE * allocsz) * 1024); } static void __pcap_mm_prepare_access_wr(int fd, bool jumbo) { int ret; off_t pos; struct stat sb; map_size = ____get_map_size(jumbo); ret = fstat(fd, &sb); if (ret < 0) panic("Cannot fstat pcap file!\n"); if (!S_ISREG (sb.st_mode)) panic("pcap dump file is not a regular file!\n"); pos = lseek(fd, map_size, SEEK_SET); if (pos < 0) panic("Cannot lseek pcap file!\n"); ret = write_or_die(fd, "", 1); if (ret != 1) panic("Cannot write file!\n"); ptr_va_start = mmap(0, map_size, PROT_WRITE, MAP_SHARED, fd, 0); if (ptr_va_start == MAP_FAILED) panic("mmap of file failed!"); ret = madvise(ptr_va_start, map_size, MADV_SEQUENTIAL); if (ret < 0) panic("Failed to give kernel mmap advise!\n"); ptr_va_curr = ptr_va_start + sizeof(struct pcap_filehdr); } static void __pcap_mm_prepare_access_rd(int fd) { int ret; struct stat sb; ret = fstat(fd, &sb); if (ret < 0) panic("Cannot fstat pcap file!\n"); if (!S_ISREG (sb.st_mode)) panic("pcap dump file is not a regular file!\n"); map_size = sb.st_size; ptr_va_start = mmap(0, map_size, PROT_READ, MAP_SHARED | MAP_LOCKED, fd, 0); if (ptr_va_start == MAP_FAILED) panic("mmap of file failed!"); ret = madvise(ptr_va_start, map_size, MADV_SEQUENTIAL); if (ret < 0) panic("Failed to give kernel mmap advise!\n"); ptr_va_curr = ptr_va_start + sizeof(struct pcap_filehdr); } static void pcap_mm_init_once(void) { set_ioprio_be(); } static int pcap_mm_prepare_access(int fd, enum pcap_mode mode, bool jumbo) { switch (mode) { case PCAP_MODE_RD: __pcap_mm_prepare_access_rd(fd); break; case PCAP_MODE_WR: __pcap_mm_prepare_access_wr(fd, jumbo); break; default: bug(); } return 0; } static void pcap_mm_fsync(int fd) { msync(ptr_va_start, (off_t) (ptr_va_curr - ptr_va_start), MS_ASYNC); } static void pcap_mm_prepare_close(int fd, enum pcap_mode mode) { int ret; ret = munmap(ptr_va_start, map_size); if (ret < 0) panic("Cannot unmap the pcap file!\n"); if (mode == PCAP_MODE_WR) { ret = ftruncate(fd, (off_t) (ptr_va_curr - ptr_va_start)); if (ret) panic("Cannot truncate the pcap file!\n"); } } const struct pcap_file_ops pcap_mm_ops = { .init_once_pcap = pcap_mm_init_once, .pull_fhdr_pcap = pcap_generic_pull_fhdr, .push_fhdr_pcap = pcap_generic_push_fhdr, .prepare_access_pcap = pcap_mm_prepare_access, .prepare_close_pcap = pcap_mm_prepare_close, .read_pcap = pcap_mm_read, .write_pcap = pcap_mm_write, .fsync_pcap = pcap_mm_fsync, }; cgi/linux/net-next.git/commit/Documentation/misc-devices?id=917e50d6941ed8b2bbde0a066f15f0d19e8f9409'>917e50d6941ed8b2bbde0a066f15f0d19e8f9409 (patch) tree477357a5c560d506986780826258c09b53576fda /Documentation/misc-devices parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
regulator: max77802: Fix DT binding document reference
The DT binding doc references the max77802 clocks header file which makes no sense since of course it doesn't contain data related to the regulators. It's a copy and paste error, so add a reference to the correct header file. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/misc-devices')