-static void fill_random_bytes(struct thread_data *td,
- unsigned char *p, unsigned int len)
-{
- unsigned int todo;
- double r;
-
- while (len) {
- r = os_random_double(&td->verify_state);
-
- /*
- * lrand48_r seems to be broken and only fill the bottom
- * 32-bits, even on 64-bit archs with 64-bit longs
- */
- todo = sizeof(r);
- if (todo > len)
- todo = len;
-
- memcpy(p, &r, todo);
-
- len -= todo;
- p += todo;
- }
-}
-
-static void hexdump(void *buffer, int len)
-{
- unsigned char *p = buffer;
- int i;
-
- for (i = 0; i < len; i++)
- fprintf(f_out, "%02x", p[i]);
- fprintf(f_out, "\n");
-}
-
-static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u)
-{
- unsigned char *p = (unsigned char *) io_u->buf;
- unsigned long c;
-
- p += sizeof(*hdr);
- c = crc32(p, hdr->len - sizeof(*hdr));
-
- if (c != hdr->crc32) {
- log_err("crc32: verify failed at %llu/%u\n", io_u->offset, io_u->buflen);
- log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c);
- return 1;
- }
-
- return 0;
-}
-
-static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u)
-{
- unsigned char *p = (unsigned char *) io_u->buf;
- struct md5_ctx md5_ctx;
-
- memset(&md5_ctx, 0, sizeof(md5_ctx));
- p += sizeof(*hdr);
- md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr));
-
- if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) {
- log_err("md5: verify failed at %llu/%u\n", io_u->offset, io_u->buflen);
- hexdump(hdr->md5_digest, sizeof(hdr->md5_digest));
- hexdump(md5_ctx.hash, sizeof(md5_ctx.hash));
- return 1;
- }
-
- return 0;
-}
-
-static int verify_io_u(struct io_u *io_u)
-{
- struct verify_header *hdr = (struct verify_header *) io_u->buf;
- int ret;
-
- if (hdr->fio_magic != FIO_HDR_MAGIC)
- return 1;
-
- if (hdr->verify_type == VERIFY_MD5)
- ret = verify_io_u_md5(hdr, io_u);
- else if (hdr->verify_type == VERIFY_CRC32)
- ret = verify_io_u_crc32(hdr, io_u);
- else {
- log_err("Bad verify type %d\n", hdr->verify_type);
- ret = 1;
- }
-
- return ret;
-}
-
-static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
-{
- hdr->crc32 = crc32(p, len);
-}
-
-static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
-{
- struct md5_ctx md5_ctx;
-
- memset(&md5_ctx, 0, sizeof(md5_ctx));
- md5_update(&md5_ctx, p, len);
- memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash));
-}
-
-/*
- * Return the data direction for the next io_u. If the job is a
- * mixed read/write workload, check the rwmix cycle and switch if
- * necessary.
- */
-static int get_rw_ddir(struct thread_data *td)
-{
- if (td_rw(td)) {
- struct timeval now;
- unsigned long elapsed;
-
- gettimeofday(&now, NULL);
- elapsed = mtime_since_now(&td->rwmix_switch);
-
- /*
- * Check if it's time to seed a new data direction.
- */
- if (elapsed >= td->rwmixcycle) {
- int v;
- long r;
-
- r = os_random_long(&td->rwmix_state);
- v = 1 + (int) (100.0 * (r / (RAND_MAX + 1.0)));
- if (v < td->rwmixread)
- td->rwmix_ddir = DDIR_READ;
- else
- td->rwmix_ddir = DDIR_WRITE;
- memcpy(&td->rwmix_switch, &now, sizeof(now));
- }
- return td->rwmix_ddir;
- } else if (td_read(td))
- return DDIR_READ;
- else
- return DDIR_WRITE;
-}
-
-/*
- * fill body of io_u->buf with random data and add a header with the
- * crc32 or md5 sum of that data.
- */
-static void populate_io_u(struct thread_data *td, struct io_u *io_u)
-{
- unsigned char *p = (unsigned char *) io_u->buf;
- struct verify_header hdr;
-
- hdr.fio_magic = FIO_HDR_MAGIC;
- hdr.len = io_u->buflen;
- p += sizeof(hdr);
- fill_random_bytes(td, p, io_u->buflen - sizeof(hdr));
-
- if (td->verify == VERIFY_MD5) {
- fill_md5(&hdr, p, io_u->buflen - sizeof(hdr));
- hdr.verify_type = VERIFY_MD5;
- } else {
- fill_crc32(&hdr, p, io_u->buflen - sizeof(hdr));
- hdr.verify_type = VERIFY_CRC32;
- }
-
- memcpy(io_u->buf, &hdr, sizeof(hdr));
-}
-
-static int td_io_prep(struct thread_data *td, struct io_u *io_u)
-{
- if (td->io_prep && td->io_prep(td, io_u))
- return 1;
-
- return 0;
-}
-
-void put_io_u(struct thread_data *td, struct io_u *io_u)
-{
- list_del(&io_u->list);
- list_add(&io_u->list, &td->io_u_freelist);
- td->cur_depth--;
-}
-
-static int fill_io_u(struct thread_data *td, struct io_u *io_u)
-{
- /*
- * If using an iolog, grab next piece if any available.
- */
- if (td->read_iolog)
- return read_iolog_get(td, io_u);
-
- /*
- * No log, let the seq/rand engine retrieve the next position.
- */
- if (!get_next_offset(td, &io_u->offset)) {
- io_u->buflen = get_next_buflen(td);
-
- if (io_u->buflen) {
- io_u->ddir = get_rw_ddir(td);
-
- /*
- * If using a write iolog, store this entry.
- */
- if (td->write_iolog)
- write_iolog_put(td, io_u);
-
- return 0;
- }
- }
-
- return 1;
-}
-
-#define queue_full(td) list_empty(&(td)->io_u_freelist)
-
-struct io_u *__get_io_u(struct thread_data *td)
-{
- struct io_u *io_u = NULL;
-
- if (!queue_full(td)) {
- io_u = list_entry(td->io_u_freelist.next, struct io_u, list);
-
- io_u->error = 0;
- io_u->resid = 0;
- list_del(&io_u->list);
- list_add(&io_u->list, &td->io_u_busylist);
- td->cur_depth++;
- }
-
- return io_u;
-}
-
-/*
- * Return an io_u to be processed. Gets a buflen and offset, sets direction,
- * etc. The returned io_u is fully ready to be prepped and submitted.
- */
-static struct io_u *get_io_u(struct thread_data *td)
-{
- struct io_u *io_u;
-
- io_u = __get_io_u(td);
- if (!io_u)
- return NULL;
-
- if (td->zone_bytes >= td->zone_size) {
- td->zone_bytes = 0;
- td->last_pos += td->zone_skip;
- }
-
- if (fill_io_u(td, io_u)) {
- put_io_u(td, io_u);
- return NULL;
- }
-
- if (io_u->buflen + io_u->offset > td->real_file_size)
- io_u->buflen = td->real_file_size - io_u->offset;
-
- if (!io_u->buflen) {
- put_io_u(td, io_u);
- return NULL;
- }
-
- if (!td->read_iolog && !td->sequential)
- mark_random_map(td, io_u);
-
- td->last_pos += io_u->buflen;
-
- if (td->verify != VERIFY_NONE)
- populate_io_u(td, io_u);
-
- if (td_io_prep(td, io_u)) {
- put_io_u(td, io_u);
- return NULL;
- }
-
- gettimeofday(&io_u->start_time, NULL);
- return io_u;
-}
-
-static inline void td_set_runstate(struct thread_data *td, int runstate)
-{
- td->runstate = runstate;
-}
-
-static int get_next_verify(struct thread_data *td, struct io_u *io_u)
-{
- struct io_piece *ipo;
-
- if (!list_empty(&td->io_hist_list)) {
- ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
-
- list_del(&ipo->list);
-
- io_u->offset = ipo->offset;
- io_u->buflen = ipo->len;
- io_u->ddir = DDIR_READ;
- free(ipo);
- return 0;
- }
-
- return 1;
-}
-
-static int sync_td(struct thread_data *td)
-{
- if (td->io_sync)
- return td->io_sync(td);
-
- return 0;
-}
-
-static int io_u_getevents(struct thread_data *td, int min, int max,
- struct timespec *t)
-{
- return td->io_getevents(td, min, max, t);
-}
-
-static int io_u_queue(struct thread_data *td, struct io_u *io_u)