2 * IO verification helpers
11 static void fill_random_bytes(struct thread_data *td,
12 unsigned char *p, unsigned int len)
18 r = os_random_long(&td->verify_state);
21 * lrand48_r seems to be broken and only fill the bottom
22 * 32-bits, even on 64-bit archs with 64-bit longs
35 static void hexdump(void *buffer, int len)
37 unsigned char *p = buffer;
40 for (i = 0; i < len; i++)
41 log_info("%02x", p[i]);
45 static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u)
47 unsigned char *p = io_u->buf;
51 c = crc16(p, hdr->len - sizeof(*hdr));
53 if (c != hdr->crc16) {
54 log_err("crc16: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
55 log_err("crc16: wanted %lx, got %x\n", hdr->crc32, c);
62 static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u)
64 unsigned char *p = io_u->buf;
68 c = crc32(p, hdr->len - sizeof(*hdr));
70 if (c != hdr->crc32) {
71 log_err("crc32: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
72 log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c);
79 static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u)
81 unsigned char *p = io_u->buf;
82 struct md5_ctx md5_ctx;
84 memset(&md5_ctx, 0, sizeof(md5_ctx));
86 md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr));
88 if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash))) {
89 log_err("md5: verify failed at %llu/%lu\n", io_u->offset, io_u->buflen);
90 hexdump(hdr->md5_digest, sizeof(hdr->md5_digest));
91 hexdump(md5_ctx.hash, sizeof(md5_ctx.hash));
98 int verify_io_u(struct thread_data *td, struct io_u *io_u)
100 struct verify_header *hdr = (struct verify_header *) io_u->buf;
103 if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
106 if (hdr->fio_magic != FIO_HDR_MAGIC) {
107 log_err("Bad verify header %x\n", hdr->fio_magic);
111 if (hdr->verify_type == VERIFY_MD5)
112 ret = verify_io_u_md5(hdr, io_u);
113 else if (hdr->verify_type == VERIFY_CRC32)
114 ret = verify_io_u_crc32(hdr, io_u);
115 else if (hdr->verify_type == VERIFY_CRC16)
116 ret = verify_io_u_crc16(hdr, io_u);
118 log_err("Bad verify type %u\n", hdr->verify_type);
128 static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
130 hdr->crc16 = crc16(p, len);
133 static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
135 hdr->crc32 = crc32(p, len);
138 static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
140 struct md5_ctx md5_ctx;
142 memset(&md5_ctx, 0, sizeof(md5_ctx));
143 md5_update(&md5_ctx, p, len);
144 memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash));
148 * fill body of io_u->buf with random data and add a header with the
149 * crc32 or md5 sum of that data.
151 void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
153 unsigned char *p = (unsigned char *) io_u->buf;
154 struct verify_header hdr;
156 if (td->o.verify == VERIFY_NULL)
159 hdr.fio_magic = FIO_HDR_MAGIC;
160 hdr.len = io_u->buflen;
162 fill_random_bytes(td, p, io_u->buflen - sizeof(hdr));
164 if (td->o.verify == VERIFY_MD5) {
165 fill_md5(&hdr, p, io_u->buflen - sizeof(hdr));
166 hdr.verify_type = VERIFY_MD5;
167 } else if (td->o.verify == VERIFY_CRC32) {
168 fill_crc32(&hdr, p, io_u->buflen - sizeof(hdr));
169 hdr.verify_type = VERIFY_CRC32;
170 } else if (td->o.verify == VERIFY_CRC16) {
171 fill_crc16(&hdr, p, io_u->buflen - sizeof(hdr));
172 hdr.verify_type = VERIFY_CRC16;
175 memcpy(io_u->buf, &hdr, sizeof(hdr));
178 int get_next_verify(struct thread_data *td, struct io_u *io_u)
180 struct io_piece *ipo = NULL;
183 * this io_u is from a requeue, we already filled the offsets
188 if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
189 struct rb_node *n = rb_first(&td->io_hist_tree);
191 ipo = rb_entry(n, struct io_piece, rb_node);
192 rb_erase(n, &td->io_hist_tree);
193 } else if (!list_empty(&td->io_hist_list)) {
194 ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
195 list_del(&ipo->list);
199 io_u->offset = ipo->offset;
200 io_u->buflen = ipo->len;
201 io_u->file = ipo->file;
203 if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
204 int r = td_io_open_file(td, io_u->file);
211 assert(io_u->file->flags & FIO_FILE_OPEN);
212 io_u->ddir = DDIR_READ;
213 io_u->xfer_buf = io_u->buf;
214 io_u->xfer_buflen = io_u->buflen;