root / hw / virtio-9p-debug.c @ c18e2f94
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/*
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* Virtio 9p PDU debug
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "virtio.h" |
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#include "pc.h" |
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#include "virtio-9p.h" |
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#include "virtio-9p-debug.h" |
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#define BUG_ON(cond) assert(!(cond))
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static FILE *llogfile;
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static struct iovec *get_sg(V9fsPDU *pdu, int rx) |
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{
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if (rx) {
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return pdu->elem.in_sg;
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} |
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return pdu->elem.out_sg;
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} |
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static int get_sg_count(V9fsPDU *pdu, int rx) |
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{
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if (rx) {
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return pdu->elem.in_num;
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} |
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return pdu->elem.out_num;
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} |
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static void pprint_int8(V9fsPDU *pdu, int rx, size_t *offsetp, |
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const char *name) |
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{
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size_t copied; |
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int count = get_sg_count(pdu, rx);
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size_t offset = *offsetp; |
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struct iovec *sg = get_sg(pdu, rx);
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int8_t value; |
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copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
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BUG_ON(copied != sizeof(value));
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offset += sizeof(value);
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fprintf(llogfile, "%s=0x%x", name, value);
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*offsetp = offset; |
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} |
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|
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static void pprint_int16(V9fsPDU *pdu, int rx, size_t *offsetp, |
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const char *name) |
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{
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size_t copied; |
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int count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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int16_t value; |
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copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
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BUG_ON(copied != sizeof(value));
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offset += sizeof(value);
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fprintf(llogfile, "%s=0x%x", name, value);
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*offsetp = offset; |
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} |
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|
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static void pprint_int32(V9fsPDU *pdu, int rx, size_t *offsetp, |
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const char *name) |
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{
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size_t copied; |
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int count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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int32_t value; |
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copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
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BUG_ON(copied != sizeof(value));
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offset += sizeof(value);
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fprintf(llogfile, "%s=0x%x", name, value);
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*offsetp = offset; |
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} |
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static void pprint_int64(V9fsPDU *pdu, int rx, size_t *offsetp, |
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const char *name) |
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{
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size_t copied; |
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int count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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int64_t value; |
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copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
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BUG_ON(copied != sizeof(value));
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offset += sizeof(value);
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fprintf(llogfile, "%s=0x%" PRIx64, name, value);
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*offsetp = offset; |
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} |
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static void pprint_str(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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int sg_count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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uint16_t tmp_size, size; |
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size_t result; |
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size_t copied = 0;
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int i = 0; |
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/* get the size */
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copied = do_pdu_unpack(&tmp_size, sg, sg_count, offset, sizeof(tmp_size));
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BUG_ON(copied != sizeof(tmp_size));
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size = le16_to_cpupu(&tmp_size); |
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offset += copied; |
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fprintf(llogfile, "%s=", name);
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for (i = 0; size && i < sg_count; i++) { |
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size_t len; |
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if (offset >= sg[i].iov_len) {
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/* skip this sg */
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offset -= sg[i].iov_len; |
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continue;
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} else {
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len = MIN(sg[i].iov_len - offset, size); |
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result = fwrite(sg[i].iov_base + offset, 1, len, llogfile);
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BUG_ON(result != len); |
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size -= len; |
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copied += len; |
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if (size) {
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offset = 0;
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continue;
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} |
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} |
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} |
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*offsetp += copied; |
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} |
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static void pprint_qid(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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fprintf(llogfile, "%s={", name);
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pprint_int8(pdu, rx, offsetp, "type");
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pprint_int32(pdu, rx, offsetp, ", version");
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pprint_int64(pdu, rx, offsetp, ", path");
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fprintf(llogfile, "}");
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} |
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static void pprint_stat(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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fprintf(llogfile, "%s={", name);
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pprint_int16(pdu, rx, offsetp, "size");
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pprint_int16(pdu, rx, offsetp, ", type");
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pprint_int32(pdu, rx, offsetp, ", dev");
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pprint_qid(pdu, rx, offsetp, ", qid");
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pprint_int32(pdu, rx, offsetp, ", mode");
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pprint_int32(pdu, rx, offsetp, ", atime");
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pprint_int32(pdu, rx, offsetp, ", mtime");
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pprint_int64(pdu, rx, offsetp, ", length");
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pprint_str(pdu, rx, offsetp, ", name");
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pprint_str(pdu, rx, offsetp, ", uid");
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pprint_str(pdu, rx, offsetp, ", gid");
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pprint_str(pdu, rx, offsetp, ", muid");
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if (dotu) {
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pprint_str(pdu, rx, offsetp, ", extension");
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pprint_int32(pdu, rx, offsetp, ", uid");
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pprint_int32(pdu, rx, offsetp, ", gid");
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pprint_int32(pdu, rx, offsetp, ", muid");
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} |
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fprintf(llogfile, "}");
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} |
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static void pprint_strs(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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int sg_count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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uint16_t tmp_count, count, i; |
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size_t copied = 0;
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fprintf(llogfile, "%s={", name);
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/* Get the count */
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copied = do_pdu_unpack(&tmp_count, sg, sg_count, offset, sizeof(tmp_count));
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BUG_ON(copied != sizeof(tmp_count));
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count = le16_to_cpupu(&tmp_count); |
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offset += copied; |
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for (i = 0; i < count; i++) { |
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char str[512]; |
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if (i) {
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fprintf(llogfile, ", ");
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} |
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snprintf(str, sizeof(str), "[%d]", i); |
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pprint_str(pdu, rx, &offset, str); |
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} |
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fprintf(llogfile, "}");
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*offsetp = offset; |
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} |
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static void pprint_qids(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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int sg_count = get_sg_count(pdu, rx);
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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uint16_t tmp_count, count, i; |
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size_t copied = 0;
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fprintf(llogfile, "%s={", name);
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copied = do_pdu_unpack(&tmp_count, sg, sg_count, offset, sizeof(tmp_count));
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BUG_ON(copied != sizeof(tmp_count));
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count = le16_to_cpupu(&tmp_count); |
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offset += copied; |
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for (i = 0; i < count; i++) { |
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char str[512]; |
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if (i) {
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fprintf(llogfile, ", ");
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} |
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snprintf(str, sizeof(str), "[%d]", i); |
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pprint_qid(pdu, rx, &offset, str); |
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} |
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fprintf(llogfile, "}");
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*offsetp = offset; |
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} |
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static void pprint_sg(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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struct iovec *sg = get_sg(pdu, rx);
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unsigned int count; |
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int i;
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if (rx) {
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count = pdu->elem.in_num; |
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} else {
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count = pdu->elem.out_num; |
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} |
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fprintf(llogfile, "%s={", name);
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for (i = 0; i < count; i++) { |
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if (i) {
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fprintf(llogfile, ", ");
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} |
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fprintf(llogfile, "(%p, 0x%zx)", sg[i].iov_base, sg[i].iov_len);
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} |
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fprintf(llogfile, "}");
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} |
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/* FIXME: read from a directory fid returns serialized stat_t's */
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#ifdef DEBUG_DATA
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static void pprint_data(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name) |
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{
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struct iovec *sg = get_sg(pdu, rx);
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size_t offset = *offsetp; |
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unsigned int count; |
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int32_t size; |
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int total, i, j;
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ssize_t len; |
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if (rx) {
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count = pdu->elem.in_num; |
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} else
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count = pdu->elem.out_num; |
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} |
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BUG_ON((offset + sizeof(size)) > sg[0].iov_len); |
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memcpy(&size, sg[0].iov_base + offset, sizeof(size)); |
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offset += sizeof(size);
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fprintf(llogfile, "size: %x\n", size);
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sg[0].iov_base += 11; /* skip header */ |
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sg[0].iov_len -= 11; |
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total = 0;
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for (i = 0; i < count; i++) { |
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total += sg[i].iov_len; |
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if (total >= size) {
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/* trim sg list so writev does the right thing */
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sg[i].iov_len -= (total - size); |
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i++; |
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break;
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} |
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} |
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|
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fprintf(llogfile, "%s={\"", name);
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fflush(llogfile); |
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for (j = 0; j < i; j++) { |
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if (j) {
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fprintf(llogfile, "\", \"");
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fflush(llogfile); |
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} |
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do {
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len = writev(fileno(llogfile), &sg[j], 1);
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} while (len == -1 && errno == EINTR); |
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fprintf(llogfile, "len == %ld: %m\n", len);
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BUG_ON(len != sg[j].iov_len); |
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} |
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fprintf(llogfile, "\"}");
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sg[0].iov_base -= 11; |
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sg[0].iov_len += 11; |
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} |
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#endif
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|
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void pprint_pdu(V9fsPDU *pdu)
|
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{
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size_t offset = 7;
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|
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if (llogfile == NULL) { |
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llogfile = fopen("/tmp/pdu.log", "w"); |
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} |
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|
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BUG_ON(!llogfile); |
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|
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switch (pdu->id) {
|
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case P9_TREADDIR:
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fprintf(llogfile, "TREADDIR: (");
|
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pprint_int32(pdu, 0, &offset, "fid"); |
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pprint_int64(pdu, 0, &offset, ", initial offset"); |
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pprint_int32(pdu, 0, &offset, ", max count"); |
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break;
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case P9_RREADDIR:
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fprintf(llogfile, "RREADDIR: (");
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pprint_int32(pdu, 1, &offset, "count"); |
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#ifdef DEBUG_DATA
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pprint_data(pdu, 1, &offset, ", data"); |
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#endif
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break;
|
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case P9_TVERSION:
|
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fprintf(llogfile, "TVERSION: (");
|
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pprint_int32(pdu, 0, &offset, "msize"); |
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pprint_str(pdu, 0, &offset, ", version"); |
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break;
|
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case P9_RVERSION:
|
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fprintf(llogfile, "RVERSION: (");
|
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pprint_int32(pdu, 1, &offset, "msize"); |
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pprint_str(pdu, 1, &offset, ", version"); |
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break;
|
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case P9_TAUTH:
|
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fprintf(llogfile, "TAUTH: (");
|
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pprint_int32(pdu, 0, &offset, "afid"); |
| 359 |
pprint_str(pdu, 0, &offset, ", uname"); |
| 360 |
pprint_str(pdu, 0, &offset, ", aname"); |
| 361 |
if (dotu) {
|
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pprint_int32(pdu, 0, &offset, ", n_uname"); |
| 363 |
} |
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break;
|
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case P9_RAUTH:
|
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fprintf(llogfile, "RAUTH: (");
|
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pprint_qid(pdu, 1, &offset, "qid"); |
| 368 |
break;
|
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case P9_TATTACH:
|
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fprintf(llogfile, "TATTACH: (");
|
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pprint_int32(pdu, 0, &offset, "fid"); |
| 372 |
pprint_int32(pdu, 0, &offset, ", afid"); |
| 373 |
pprint_str(pdu, 0, &offset, ", uname"); |
| 374 |
pprint_str(pdu, 0, &offset, ", aname"); |
| 375 |
if (dotu) {
|
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pprint_int32(pdu, 0, &offset, ", n_uname"); |
| 377 |
} |
| 378 |
break;
|
| 379 |
case P9_RATTACH:
|
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fprintf(llogfile, "RATTACH: (");
|
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pprint_qid(pdu, 1, &offset, "qid"); |
| 382 |
break;
|
| 383 |
case P9_TERROR:
|
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fprintf(llogfile, "TERROR: (");
|
| 385 |
break;
|
| 386 |
case P9_RERROR:
|
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fprintf(llogfile, "RERROR: (");
|
| 388 |
pprint_str(pdu, 1, &offset, "ename"); |
| 389 |
if (dotu) {
|
| 390 |
pprint_int32(pdu, 1, &offset, ", ecode"); |
| 391 |
} |
| 392 |
break;
|
| 393 |
case P9_TFLUSH:
|
| 394 |
fprintf(llogfile, "TFLUSH: (");
|
| 395 |
pprint_int16(pdu, 0, &offset, "oldtag"); |
| 396 |
break;
|
| 397 |
case P9_RFLUSH:
|
| 398 |
fprintf(llogfile, "RFLUSH: (");
|
| 399 |
break;
|
| 400 |
case P9_TWALK:
|
| 401 |
fprintf(llogfile, "TWALK: (");
|
| 402 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 403 |
pprint_int32(pdu, 0, &offset, ", newfid"); |
| 404 |
pprint_strs(pdu, 0, &offset, ", wnames"); |
| 405 |
break;
|
| 406 |
case P9_RWALK:
|
| 407 |
fprintf(llogfile, "RWALK: (");
|
| 408 |
pprint_qids(pdu, 1, &offset, "wqids"); |
| 409 |
break;
|
| 410 |
case P9_TOPEN:
|
| 411 |
fprintf(llogfile, "TOPEN: (");
|
| 412 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 413 |
pprint_int8(pdu, 0, &offset, ", mode"); |
| 414 |
break;
|
| 415 |
case P9_ROPEN:
|
| 416 |
fprintf(llogfile, "ROPEN: (");
|
| 417 |
pprint_qid(pdu, 1, &offset, "qid"); |
| 418 |
pprint_int32(pdu, 1, &offset, ", iounit"); |
| 419 |
break;
|
| 420 |
case P9_TCREATE:
|
| 421 |
fprintf(llogfile, "TCREATE: (");
|
| 422 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 423 |
pprint_str(pdu, 0, &offset, ", name"); |
| 424 |
pprint_int32(pdu, 0, &offset, ", perm"); |
| 425 |
pprint_int8(pdu, 0, &offset, ", mode"); |
| 426 |
if (dotu) {
|
| 427 |
pprint_str(pdu, 0, &offset, ", extension"); |
| 428 |
} |
| 429 |
break;
|
| 430 |
case P9_RCREATE:
|
| 431 |
fprintf(llogfile, "RCREATE: (");
|
| 432 |
pprint_qid(pdu, 1, &offset, "qid"); |
| 433 |
pprint_int32(pdu, 1, &offset, ", iounit"); |
| 434 |
break;
|
| 435 |
case P9_TREAD:
|
| 436 |
fprintf(llogfile, "TREAD: (");
|
| 437 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 438 |
pprint_int64(pdu, 0, &offset, ", offset"); |
| 439 |
pprint_int32(pdu, 0, &offset, ", count"); |
| 440 |
pprint_sg(pdu, 0, &offset, ", sg"); |
| 441 |
break;
|
| 442 |
case P9_RREAD:
|
| 443 |
fprintf(llogfile, "RREAD: (");
|
| 444 |
pprint_int32(pdu, 1, &offset, "count"); |
| 445 |
pprint_sg(pdu, 1, &offset, ", sg"); |
| 446 |
offset = 7;
|
| 447 |
#ifdef DEBUG_DATA
|
| 448 |
pprint_data(pdu, 1, &offset, ", data"); |
| 449 |
#endif
|
| 450 |
break;
|
| 451 |
case P9_TWRITE:
|
| 452 |
fprintf(llogfile, "TWRITE: (");
|
| 453 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 454 |
pprint_int64(pdu, 0, &offset, ", offset"); |
| 455 |
pprint_int32(pdu, 0, &offset, ", count"); |
| 456 |
break;
|
| 457 |
case P9_RWRITE:
|
| 458 |
fprintf(llogfile, "RWRITE: (");
|
| 459 |
pprint_int32(pdu, 1, &offset, "count"); |
| 460 |
break;
|
| 461 |
case P9_TCLUNK:
|
| 462 |
fprintf(llogfile, "TCLUNK: (");
|
| 463 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 464 |
break;
|
| 465 |
case P9_RCLUNK:
|
| 466 |
fprintf(llogfile, "RCLUNK: (");
|
| 467 |
break;
|
| 468 |
case P9_TREMOVE:
|
| 469 |
fprintf(llogfile, "TREMOVE: (");
|
| 470 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 471 |
break;
|
| 472 |
case P9_RREMOVE:
|
| 473 |
fprintf(llogfile, "RREMOVE: (");
|
| 474 |
break;
|
| 475 |
case P9_TSTAT:
|
| 476 |
fprintf(llogfile, "TSTAT: (");
|
| 477 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 478 |
break;
|
| 479 |
case P9_RSTAT:
|
| 480 |
fprintf(llogfile, "RSTAT: (");
|
| 481 |
offset += 2; /* ignored */ |
| 482 |
pprint_stat(pdu, 1, &offset, "stat"); |
| 483 |
break;
|
| 484 |
case P9_TWSTAT:
|
| 485 |
fprintf(llogfile, "TWSTAT: (");
|
| 486 |
pprint_int32(pdu, 0, &offset, "fid"); |
| 487 |
offset += 2; /* ignored */ |
| 488 |
pprint_stat(pdu, 0, &offset, ", stat"); |
| 489 |
break;
|
| 490 |
case P9_RWSTAT:
|
| 491 |
fprintf(llogfile, "RWSTAT: (");
|
| 492 |
break;
|
| 493 |
default:
|
| 494 |
fprintf(llogfile, "unknown(%d): (", pdu->id);
|
| 495 |
break;
|
| 496 |
} |
| 497 |
|
| 498 |
fprintf(llogfile, ")\n");
|
| 499 |
/* Flush the log message out */
|
| 500 |
fflush(llogfile); |
| 501 |
} |