// SPDX-License-Identifier: GPL-2.0-or-later/* * ffs-test.c -- user mode filesystem api for usb composite function * * Copyright (C) 2010 Samsung Electronics * Author: Michal Nazarewicz <mina86@mina86.com> */ /* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */ #define _DEFAULT_SOURCE /* for endian.h */ #include <endian.h>#include <errno.h>#include <fcntl.h>#include <pthread.h>#include <stdarg.h>#include <stdbool.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/ioctl.h>#include <sys/stat.h>#include <sys/types.h>#include <unistd.h>#include <tools/le_byteshift.h> #include "../../include/uapi/linux/usb/functionfs.h" /******************** Little Endian Handling ********************************/ /* * cpu_to_le16/32 are used when initializing structures, a context where a * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way * that allows them to be used when initializing structures. */ #if __BYTE_ORDER == __LITTLE_ENDIAN#define cpu_to_le16(x) (x)#define cpu_to_le32(x) (x)#else#define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))#define cpu_to_le32(x) \ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))#endif #define le32_to_cpu(x) le32toh(x)#define le16_to_cpu(x) le16toh(x) /******************** Messages and Errors ***********************************/ static const char argv0[] = "ffs-test"; static unsigned verbosity = 7; static void _msg(unsigned level, const char *fmt, ...){ if (level < 2) level = 2; else if (level > 7) level = 7; if (level <= verbosity) { static const char levels[8][6] = { [2] = "crit:", [3] = "err: ", [4] = "warn:", [5] = "note:", [6] = "info:", [7] = "dbg: " }; int _errno = errno; va_list ap; fprintf(stderr, "%s: %s ", argv0, levels[level]); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); if (fmt[strlen(fmt) - 1] != '\n') { char buffer[128]; strerror_r(_errno, buffer, sizeof buffer); fprintf(stderr, ": (-%d) %s\n", _errno, buffer); } fflush(stderr); }} #define die(...) (_msg(2, __VA_ARGS__), exit(1))#define err(...) _msg(3, __VA_ARGS__)#define warn(...) _msg(4, __VA_ARGS__)#define note(...) _msg(5, __VA_ARGS__)#define info(...) _msg(6, __VA_ARGS__)#define debug(...) _msg(7, __VA_ARGS__) #define die_on(cond, ...) do { \ if (cond) \ die(__VA_ARGS__); \ } while (0) /******************** Descriptors and Strings *******************************/ static const struct { struct usb_functionfs_descs_head_v2 header; __le32 fs_count; __le32 hs_count; __le32 ss_count; struct { struct usb_interface_descriptor intf; struct usb_endpoint_descriptor_no_audio sink; struct usb_endpoint_descriptor_no_audio source; } __attribute__((packed)) fs_descs, hs_descs; struct { struct usb_interface_descriptor intf; struct usb_endpoint_descriptor_no_audio sink; struct usb_ss_ep_comp_descriptor sink_comp; struct usb_endpoint_descriptor_no_audio source; struct usb_ss_ep_comp_descriptor source_comp; } ss_descs;} __attribute__((packed)) descriptors = { .header = { .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | FUNCTIONFS_HAS_SS_DESC), .length = cpu_to_le32(sizeof descriptors), }, .fs_count = cpu_to_le32(3), .fs_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.fs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, /* .wMaxPacketSize = autoconfiguration (kernel) */ }, .source = { .bLength = sizeof descriptors.fs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, /* .wMaxPacketSize = autoconfiguration (kernel) */ }, }, .hs_count = cpu_to_le32(3), .hs_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.hs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), }, .source = { .bLength = sizeof descriptors.hs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), .bInterval = 1, /* NAK every 1 uframe */ }, }, .ss_count = cpu_to_le32(5), .ss_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.hs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), }, .sink_comp = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, .wBytesPerInterval = 0, }, .source = { .bLength = sizeof descriptors.hs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), .bInterval = 1, /* NAK every 1 uframe */ }, .source_comp = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, .wBytesPerInterval = 0, }, },}; static size_t descs_to_legacy(void **legacy, const void *descriptors_v2){ const unsigned char *descs_end, *descs_start; __u32 length, fs_count = 0, hs_count = 0, count; /* Read v2 header */ { const struct { const struct usb_functionfs_descs_head_v2 header; const __le32 counts[]; } __attribute__((packed)) *const in = descriptors_v2; const __le32 *counts = in->counts; __u32 flags; if (le32_to_cpu(in->header.magic) != FUNCTIONFS_DESCRIPTORS_MAGIC_V2) return 0; length = le32_to_cpu(in->header.length); if (length <= sizeof in->header) return 0; length -= sizeof in->header; flags = le32_to_cpu(in->header.flags); if (flags & ~(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | FUNCTIONFS_HAS_SS_DESC)) return 0; #define GET_NEXT_COUNT_IF_FLAG(ret, flg) do { \ if (!(flags & (flg))) \ break; \ if (length < 4) \ return 0; \ ret = le32_to_cpu(*counts); \ length -= 4; \ ++counts; \ } while (0) GET_NEXT_COUNT_IF_FLAG(fs_count, FUNCTIONFS_HAS_FS_DESC); GET_NEXT_COUNT_IF_FLAG(hs_count, FUNCTIONFS_HAS_HS_DESC); GET_NEXT_COUNT_IF_FLAG(count, FUNCTIONFS_HAS_SS_DESC); count = fs_count + hs_count; if (!count) return 0; descs_start = (const void *)counts; #undef GET_NEXT_COUNT_IF_FLAG } /* * Find the end of FS and HS USB descriptors. SS descriptors * are ignored since legacy format does not support them. */ descs_end = descs_start; do { if (length < *descs_end) return 0; length -= *descs_end; descs_end += *descs_end; } while (--count); /* Allocate legacy descriptors and copy the data. */ {#pragma GCC diagnostic push#pragma GCC diagnostic ignored "-Wdeprecated-declarations" struct { struct usb_functionfs_descs_head header; __u8 descriptors[]; } __attribute__((packed)) *out;#pragma GCC diagnostic pop length = sizeof out->header + (descs_end - descs_start); out = malloc(length); out->header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC); out->header.length = cpu_to_le32(length); out->header.fs_count = cpu_to_le32(fs_count); out->header.hs_count = cpu_to_le32(hs_count); memcpy(out->descriptors, descs_start, descs_end - descs_start); *legacy = out; } return length;} #define STR_INTERFACE_ "Source/Sink" static const struct { struct usb_functionfs_strings_head header; struct { __le16 code; const char str1[sizeof STR_INTERFACE_]; } __attribute__((packed)) lang0;} __attribute__((packed)) strings = { .header = { .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), .length = cpu_to_le32(sizeof strings), .str_count = cpu_to_le32(1), .lang_count = cpu_to_le32(1), }, .lang0 = { cpu_to_le16(0x0409), /* en-us */ STR_INTERFACE_, },}; #define STR_INTERFACE strings.lang0.str1 /******************** Files and Threads Handling ****************************/ struct thread; static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes);static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes);static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes);static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes);static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes); static struct thread { const char *const filename; size_t buf_size; ssize_t (*in)(struct thread *, void *, size_t); const char *const in_name; ssize_t (*out)(struct thread *, const void *, size_t); const char *const out_name; int fd; pthread_t id; void *buf; ssize_t status;} threads[] = { { "ep0", 4 * sizeof(struct usb_functionfs_event), read_wrap, NULL, ep0_consume, "<consume>", 0, 0, NULL, 0 }, { "ep1", 8 * 1024, fill_in_buf, "<in>", write_wrap, NULL, 0, 0, NULL, 0 }, { "ep2", 8 * 1024, read_wrap, NULL, empty_out_buf, "<out>", 0, 0, NULL, 0 },}; static void init_thread(struct thread *t){ t->buf = malloc(t->buf_size); die_on(!t->buf, "malloc"); t->fd = open(t->filename, O_RDWR); die_on(t->fd < 0, "%s", t->filename);} static void cleanup_thread(void *arg){ struct thread *t = arg; int ret, fd; fd = t->fd; if (t->fd < 0) return; t->fd = -1; /* test the FIFO ioctls (non-ep0 code paths) */ if (t != threads) { ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS); if (ret < 0) { /* ENODEV reported after disconnect */ if (errno != ENODEV) err("%s: get fifo status", t->filename); } else if (ret) { warn("%s: unclaimed = %d\n", t->filename, ret); if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0) err("%s: fifo flush", t->filename); } } if (close(fd) < 0) err("%s: close", t->filename); free(t->buf); t->buf = NULL;} static void *start_thread_helper(void *arg){ const char *name, *op, *in_name, *out_name; struct thread *t = arg; ssize_t ret; info("%s: starts\n", t->filename); in_name = t->in_name ? t->in_name : t->filename; out_name = t->out_name ? t->out_name : t->filename; pthread_cleanup_push(cleanup_thread, arg); for (;;) { pthread_testcancel(); ret = t->in(t, t->buf, t->buf_size); if (ret > 0) { ret = t->out(t, t->buf, ret); name = out_name; op = "write"; } else { name = in_name; op = "read"; } if (ret > 0) { /* nop */ } else if (!ret) { debug("%s: %s: EOF", name, op); break; } else if (errno == EINTR || errno == EAGAIN) { debug("%s: %s", name, op); } else { warn("%s: %s", name, op); break; } } pthread_cleanup_pop(1); t->status = ret; info("%s: ends\n", t->filename); return NULL;} static void start_thread(struct thread *t){ debug("%s: starting\n", t->filename); die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0, "pthread_create(%s)", t->filename);} static void join_thread(struct thread *t){ int ret = pthread_join(t->id, NULL); if (ret < 0) err("%s: joining thread", t->filename); else debug("%s: joined\n", t->filename);} static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes){ return read(t->fd, buf, nbytes);} static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes){ return write(t->fd, buf, nbytes);} /******************** Empty/Fill buffer routines ****************************/ /* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE };static enum pattern pattern; static ssize_tLines 1–500 of 681. 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// SPDX-License-Identifier: GPL-2.0-or-later /* * ffs-test.c -- user mode filesystem api for usb composite function * * Copyright (C) 2010 Samsung Electronics * Author: Michal Nazarewicz <mina86@mina86.com> */ /* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */ #define _DEFAULT_SOURCE /* for endian.h */ #include <endian.h> #include <errno.h> #include <fcntl.h> #include <pthread.h> #include <stdarg.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include <tools/le_byteshift.h> #include "../../include/uapi/linux/usb/functionfs.h" /******************** Little Endian Handling ********************************/ /* * cpu_to_le16/32 are used when initializing structures, a context where a * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way * that allows them to be used when initializing structures. */ #if __BYTE_ORDER == __LITTLE_ENDIAN #define cpu_to_le16(x) (x) #define cpu_to_le32(x) (x) #else #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) #define cpu_to_le32(x) \ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) #endif #define le32_to_cpu(x) le32toh(x) #define le16_to_cpu(x) le16toh(x) /******************** Messages and Errors ***********************************/ static const char argv0[] = "ffs-test"; static unsigned verbosity = 7; static void _msg(unsigned level, const char *fmt, ...) { if (level < 2) level = 2; else if (level > 7) level = 7; if (level <= verbosity) { static const char levels[8][6] = { [2] = "crit:", [3] = "err: ", [4] = "warn:", [5] = "note:", [6] = "info:", [7] = "dbg: " }; int _errno = errno; va_list ap; fprintf(stderr, "%s: %s ", argv0, levels[level]); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); if (fmt[strlen(fmt) - 1] != '\n') { char buffer[128]; strerror_r(_errno, buffer, sizeof buffer); fprintf(stderr, ": (-%d) %s\n", _errno, buffer); } fflush(stderr); } } #define die(...) (_msg(2, __VA_ARGS__), exit(1)) #define err(...) _msg(3, __VA_ARGS__) #define warn(...) _msg(4, __VA_ARGS__) #define note(...) _msg(5, __VA_ARGS__) #define info(...) _msg(6, __VA_ARGS__) #define debug(...) _msg(7, __VA_ARGS__) #define die_on(cond, ...) do { \ if (cond) \ die(__VA_ARGS__); \ } while (0) /******************** Descriptors and Strings *******************************/ static const struct { struct usb_functionfs_descs_head_v2 header; __le32 fs_count; __le32 hs_count; __le32 ss_count; struct { struct usb_interface_descriptor intf; struct usb_endpoint_descriptor_no_audio sink; struct usb_endpoint_descriptor_no_audio source; } __attribute__((packed)) fs_descs, hs_descs; struct { struct usb_interface_descriptor intf; struct usb_endpoint_descriptor_no_audio sink; struct usb_ss_ep_comp_descriptor sink_comp; struct usb_endpoint_descriptor_no_audio source; struct usb_ss_ep_comp_descriptor source_comp; } ss_descs; } __attribute__((packed)) descriptors = { .header = { .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | FUNCTIONFS_HAS_SS_DESC), .length = cpu_to_le32(sizeof descriptors), }, .fs_count = cpu_to_le32(3), .fs_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.fs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, /* .wMaxPacketSize = autoconfiguration (kernel) */ }, .source = { .bLength = sizeof descriptors.fs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, /* .wMaxPacketSize = autoconfiguration (kernel) */ }, }, .hs_count = cpu_to_le32(3), .hs_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.hs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), }, .source = { .bLength = sizeof descriptors.hs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(512), .bInterval = 1, /* NAK every 1 uframe */ }, }, .ss_count = cpu_to_le32(5), .ss_descs = { .intf = { .bLength = sizeof descriptors.fs_descs.intf, .bDescriptorType = USB_DT_INTERFACE, .bNumEndpoints = 2, .bInterfaceClass = USB_CLASS_VENDOR_SPEC, .iInterface = 1, }, .sink = { .bLength = sizeof descriptors.hs_descs.sink, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), }, .sink_comp = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, .wBytesPerInterval = 0, }, .source = { .bLength = sizeof descriptors.hs_descs.source, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = cpu_to_le16(1024), .bInterval = 1, /* NAK every 1 uframe */ }, .source_comp = { .bLength = USB_DT_SS_EP_COMP_SIZE, .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, .wBytesPerInterval = 0, }, }, }; static size_t descs_to_legacy(void **legacy, const void *descriptors_v2) { const unsigned char *descs_end, *descs_start; __u32 length, fs_count = 0, hs_count = 0, count; /* Read v2 header */ { const struct { const struct usb_functionfs_descs_head_v2 header; const __le32 counts[]; } __attribute__((packed)) *const in = descriptors_v2; const __le32 *counts = in->counts; __u32 flags; if (le32_to_cpu(in->header.magic) != FUNCTIONFS_DESCRIPTORS_MAGIC_V2) return 0; length = le32_to_cpu(in->header.length); if (length <= sizeof in->header) return 0; length -= sizeof in->header; flags = le32_to_cpu(in->header.flags); if (flags & ~(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | FUNCTIONFS_HAS_SS_DESC)) return 0; #define GET_NEXT_COUNT_IF_FLAG(ret, flg) do { \ if (!(flags & (flg))) \ break; \ if (length < 4) \ return 0; \ ret = le32_to_cpu(*counts); \ length -= 4; \ ++counts; \ } while (0) GET_NEXT_COUNT_IF_FLAG(fs_count, FUNCTIONFS_HAS_FS_DESC); GET_NEXT_COUNT_IF_FLAG(hs_count, FUNCTIONFS_HAS_HS_DESC); GET_NEXT_COUNT_IF_FLAG(count, FUNCTIONFS_HAS_SS_DESC); count = fs_count + hs_count; if (!count) return 0; descs_start = (const void *)counts; #undef GET_NEXT_COUNT_IF_FLAG } /* * Find the end of FS and HS USB descriptors. SS descriptors * are ignored since legacy format does not support them. */ descs_end = descs_start; do { if (length < *descs_end) return 0; length -= *descs_end; descs_end += *descs_end; } while (--count); /* Allocate legacy descriptors and copy the data. */ { #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wdeprecated-declarations" struct { struct usb_functionfs_descs_head header; __u8 descriptors[]; } __attribute__((packed)) *out; #pragma GCC diagnostic pop length = sizeof out->header + (descs_end - descs_start); out = malloc(length); out->header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC); out->header.length = cpu_to_le32(length); out->header.fs_count = cpu_to_le32(fs_count); out->header.hs_count = cpu_to_le32(hs_count); memcpy(out->descriptors, descs_start, descs_end - descs_start); *legacy = out; } return length; } #define STR_INTERFACE_ "Source/Sink" static const struct { struct usb_functionfs_strings_head header; struct { __le16 code; const char str1[sizeof STR_INTERFACE_]; } __attribute__((packed)) lang0; } __attribute__((packed)) strings = { .header = { .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), .length = cpu_to_le32(sizeof strings), .str_count = cpu_to_le32(1), .lang_count = cpu_to_le32(1), }, .lang0 = { cpu_to_le16(0x0409), /* en-us */ STR_INTERFACE_, }, }; #define STR_INTERFACE strings.lang0.str1 /******************** Files and Threads Handling ****************************/ struct thread; static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes); static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes); static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes); static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes); static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes); static struct thread { const char *const filename; size_t buf_size; ssize_t (*in)(struct thread *, void *, size_t); const char *const in_name; ssize_t (*out)(struct thread *, const void *, size_t); const char *const out_name; int fd; pthread_t id; void *buf; ssize_t status; } threads[] = { { "ep0", 4 * sizeof(struct usb_functionfs_event), read_wrap, NULL, ep0_consume, "<consume>", 0, 0, NULL, 0 }, { "ep1", 8 * 1024, fill_in_buf, "<in>", write_wrap, NULL, 0, 0, NULL, 0 }, { "ep2", 8 * 1024, read_wrap, NULL, empty_out_buf, "<out>", 0, 0, NULL, 0 }, }; static void init_thread(struct thread *t) { t->buf = malloc(t->buf_size); die_on(!t->buf, "malloc"); t->fd = open(t->filename, O_RDWR); die_on(t->fd < 0, "%s", t->filename); } static void cleanup_thread(void *arg) { struct thread *t = arg; int ret, fd; fd = t->fd; if (t->fd < 0) return; t->fd = -1; /* test the FIFO ioctls (non-ep0 code paths) */ if (t != threads) { ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS); if (ret < 0) { /* ENODEV reported after disconnect */ if (errno != ENODEV) err("%s: get fifo status", t->filename); } else if (ret) { warn("%s: unclaimed = %d\n", t->filename, ret); if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0) err("%s: fifo flush", t->filename); } } if (close(fd) < 0) err("%s: close", t->filename); free(t->buf); t->buf = NULL; } static void *start_thread_helper(void *arg) { const char *name, *op, *in_name, *out_name; struct thread *t = arg; ssize_t ret; info("%s: starts\n", t->filename); in_name = t->in_name ? t->in_name : t->filename; out_name = t->out_name ? t->out_name : t->filename; pthread_cleanup_push(cleanup_thread, arg); for (;;) { pthread_testcancel(); ret = t->in(t, t->buf, t->buf_size); if (ret > 0) { ret = t->out(t, t->buf, ret); name = out_name; op = "write"; } else { name = in_name; op = "read"; } if (ret > 0) { /* nop */ } else if (!ret) { debug("%s: %s: EOF", name, op); break; } else if (errno == EINTR || errno == EAGAIN) { debug("%s: %s", name, op); } else { warn("%s: %s", name, op); break; } } pthread_cleanup_pop(1); t->status = ret; info("%s: ends\n", t->filename); return NULL; } static void start_thread(struct thread *t) { debug("%s: starting\n", t->filename); die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0, "pthread_create(%s)", t->filename); } static void join_thread(struct thread *t) { int ret = pthread_join(t->id, NULL); if (ret < 0) err("%s: joining thread", t->filename); else debug("%s: joined\n", t->filename); } static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes) { return read(t->fd, buf, nbytes); } static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes) { return write(t->fd, buf, nbytes); } /******************** Empty/Fill buffer routines ****************************/ /* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */ enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE }; static enum pattern pattern; static ssize_t