int
fs_stateWrite(struct fs_dump_state * state,
void * buf, size_t len)
{
int ret = 0;
#ifdef FS_STATE_USE_MMAP
if (fs_stateCheckIOSafety(state, len)) {
if (fs_stateResizeFile(state, len)) {
ViceLog(0, ("fs_stateWrite: could not resize dump file '%s'\n",
state->fn));
ret = 1;
goto done;
}
}
memcpy(state->mmap.cursor, buf, len);
fs_stateIncCursor(state, len);
#else
if (write(state->fd, buf, len) != len) {
ViceLog(0, ("fs_stateWrite: write failed\n"));
ret = 1;
goto done;
}
#endif
done:
return ret;
}
int
fs_stateRead(struct fs_dump_state * state,
void * buf, size_t len)
{
int ret = 0;
#ifdef FS_STATE_USE_MMAP
if (fs_stateCheckIOSafety(state, len)) {
ViceLog(0, ("fs_stateRead: read beyond EOF for dump file '%s'\n",
state->fn));
ret = 1;
goto done;
}
memcpy(buf, state->mmap.cursor, len);
fs_stateIncCursor(state, len);
#else
if (read(state->fd, buf, len) != len) {
ViceLog(0, ("fs_stateRead: read failed\n"));
ret = 1;
goto done;
}
#endif
done:
return ret;
}
int
fs_stateReadV(struct fs_dump_state * state,
struct iovec * iov, int niov)
{
int i, ret = 0;
size_t len = 0;
for (i=0; i < niov; i++) {
len += iov[i].iov_len;
}
#ifdef FS_STATE_USE_MMAP
if (fs_stateCheckIOSafety(state, len)) {
ViceLog(0, ("fs_stateRead: read beyond EOF for dump file '%s'\n",
state->fn));
ret = 1;
goto done;
}
for (i=0; i < niov; i++) {
memcpy(iov[i].iov_base, state->mmap.cursor, iov[i].iov_len);
fs_stateIncCursor(state, iov[i].iov_len);
}
#else
if (readv(state->fd, iov, niov) != len) {
ViceLog(0, ("fs_stateReadV: read failed\n"));
ret = 1;
goto done;
}
#endif
done:
return ret;
}
int
fs_stateWriteV(struct fs_dump_state * state,
struct iovec * iov, int niov)
{
int i, ret = 0;
size_t len = 0;
for (i=0; i < niov; i++) {
len += iov[i].iov_len;
}
#ifdef FS_STATE_USE_MMAP
if (fs_stateCheckIOSafety(state, len)) {
if (fs_stateResizeFile(state, len)) {
ViceLog(0, ("fs_stateWrite: could not resize dump file '%s'\n",
state->fn));
ret = 1;
goto done;
}
}
for (i=0; i < niov; i++) {
memcpy(state->mmap.cursor, iov[i].iov_base, iov[i].iov_len);
fs_stateIncCursor(state, iov[i].iov_len);
}
#else
#ifndef AFS_NT40_ENV
if (writev(state->fd, iov, niov) != len) {
ViceLog(0, ("fs_stateWriteV: write failed\n"));
ret = 1;
goto done;
}
#else /* AFS_NT40_ENV */
for (i=0; i < niov; i++) {
if (write(state->fd, iov[i].iov_base, iov[i].iov_len) != iov[i].iov_len) {
ViceLog(0, ("fs_stateWriteV: write failed\n"));
ret = 1;
goto done;
}
}
#endif /* AFS_NT40_ENV */
#endif
done:
return ret;
}
