/*
* Copyright (c) 1998 Adrian Sun (asun@zoology.washington.edu)
+ * Copyright (c) 2010,2011,2012 Frank Lahm <franklahm@googlemail.com>
* All rights reserved. See COPYRIGHT.
*
* this file provides the following functions:
#include <stdio.h>
#include <stdlib.h>
-
-#ifdef HAVE_UNISTD_H
#include <unistd.h>
-#endif
-
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
+#ifdef HAVE_SENDFILEV
+#include <sys/sendfile.h>
+#endif
+
#include <atalk/logger.h>
#include <atalk/dsi.h>
-#include <netatalk/endian.h>
#include <atalk/util.h>
-#define min(a,b) ((a) < (b) ? (a) : (b))
-
#ifndef MSG_MORE
#define MSG_MORE 0x8000
#endif
#define MSG_DONTWAIT 0x40
#endif
+/* Pack a DSI header in wire format */
+static void dsi_header_pack_reply(const DSI *dsi, char *buf)
+{
+ buf[0] = dsi->header.dsi_flags;
+ buf[1] = dsi->header.dsi_command;
+ memcpy(buf + 2, &dsi->header.dsi_requestID, sizeof(dsi->header.dsi_requestID));
+ memcpy(buf + 4, &dsi->header.dsi_code, sizeof(dsi->header.dsi_code));
+ memcpy(buf + 8, &dsi->header.dsi_len, sizeof(dsi->header.dsi_len));
+ memcpy(buf + 12, &dsi->header.dsi_reserved, sizeof(dsi->header.dsi_reserved));
+}
+
/*
* afpd is sleeping too much while trying to send something.
* May be there's no reader or the reader is also sleeping in write,
maxfd = dsi->socket + 1;
while (1) {
+ if (dsi->socket == -1)
+ /* eg dsi_disconnect() might have disconnected us */
+ return -1;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
/*
* Return all bytes up to count from dsi->buffer if there are any buffered there
*/
-static size_t from_buf(DSI *dsi, u_int8_t *buf, size_t count)
+static size_t from_buf(DSI *dsi, uint8_t *buf, size_t count)
{
size_t nbe = 0;
nbe = dsi->eof - dsi->start;
if (nbe > 0) {
- nbe = min((size_t)nbe, count);
+ nbe = MIN((size_t)nbe, count);
memcpy(buf, dsi->start, nbe);
dsi->start += nbe;
* Note: this may return fewer bytes then requested in count !!
* 3. If the buffer was empty, read from the socket.
*/
-static ssize_t buf_read(DSI *dsi, u_int8_t *buf, size_t count)
+static ssize_t buf_read(DSI *dsi, uint8_t *buf, size_t count)
{
ssize_t len;
* Get "length" bytes from buffer and/or socket. In order to avoid frequent small reads
* this tries to read larger chunks (8192 bytes) into a buffer.
*/
-static size_t dsi_buffered_stream_read(DSI *dsi, u_int8_t *data, const size_t length)
+static size_t dsi_buffered_stream_read(DSI *dsi, uint8_t *data, const size_t length)
{
size_t len;
size_t buflen;
}
/* fill the buffer with 8192 bytes or until buffer is full */
- buflen = min(8192, dsi->end - dsi->eof);
+ buflen = MIN(8192, dsi->end - dsi->eof);
if (buflen > 0) {
ssize_t ret;
ret = read(dsi->socket, dsi->eof, buflen);
* Communication error with the client, enter disconnected state
*
* 1. close the socket
- * 2. set the DSI_DISCONNECTED flag
+ * 2. set the DSI_DISCONNECTED flag, remove possible sleep flags
*
* @returns 0 if successfully entered disconnected state
* -1 if ppid is 1 which means afpd master died
*/
int dsi_disconnect(DSI *dsi)
{
+ LOG(log_note, logtype_dsi, "dsi_disconnect: entering disconnected state");
dsi->proto_close(dsi); /* 1 */
- dsi->flags |= DSI_DISCONNECTED; /* 2 */
- if (getppid() == 1 || geteuid() == 0)
+ dsi->flags &= ~(DSI_SLEEPING | DSI_EXTSLEEP); /* 2 */
+ dsi->flags |= DSI_DISCONNECTED;
+ if (geteuid() == 0)
return -1;
return 0;
}
{
size_t written;
ssize_t len;
- unsigned int flags = 0;
+ unsigned int flags;
dsi->in_write++;
written = 0;
- LOG(log_maxdebug, logtype_dsi, "dsi_stream_write: sending %u bytes", length);
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_write(send: %zd bytes): START", length);
if (dsi->flags & DSI_DISCONNECTED)
return -1;
+ if (mode & DSI_MSG_MORE)
+ flags = MSG_MORE;
+ else
+ flags = 0;
+
while (written < length) {
- len = send(dsi->socket, (u_int8_t *) data + written, length - written, flags);
+ len = send(dsi->socket, (uint8_t *) data + written, length - written, flags);
if (len >= 0) {
written += len;
continue;
}
dsi->write_count += written;
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_write(send: %zd bytes): END", length);
exit:
dsi->in_write--;
return written;
}
-
/* ---------------------------------
*/
#ifdef WITH_SENDFILE
-ssize_t dsi_stream_read_file(DSI *dsi, int fromfd, off_t offset, const size_t length)
+ssize_t dsi_stream_read_file(DSI *dsi, const int fromfd, off_t offset, const size_t length, const int err)
{
- size_t written;
- ssize_t len;
+ int ret = 0;
+ size_t written = 0;
+ size_t total = length;
+ ssize_t len;
+ off_t pos = offset;
+ char block[DSI_BLOCKSIZ];
+#ifdef HAVE_SENDFILEV
+ int sfvcnt;
+ struct sendfilevec vec[2];
+ ssize_t nwritten;
+#endif
- LOG(log_maxdebug, logtype_dsi, "dsi_stream_read_file: sending %u bytes", length);
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_read_file(off: %jd, len: %zu)", (intmax_t)offset, length);
- if (dsi->flags & DSI_DISCONNECTED)
- return -1;
+ if (dsi->flags & DSI_DISCONNECTED)
+ return -1;
- dsi->in_write++;
- written = 0;
+ dsi->in_write++;
+
+ dsi->flags |= DSI_NOREPLY;
+ dsi->header.dsi_flags = DSIFL_REPLY;
+ dsi->header.dsi_len = htonl(length);
+ dsi->header.dsi_code = htonl(err);
+ dsi_header_pack_reply(dsi, block);
+
+#ifdef HAVE_SENDFILEV
+ total += DSI_BLOCKSIZ;
+ sfvcnt = 2;
+ vec[0].sfv_fd = SFV_FD_SELF;
+ vec[0].sfv_flag = 0;
+ /* Cast to unsigned long to prevent sign extension of the
+ * pointer value for the LFS case; see Apache PR 39463. */
+ vec[0].sfv_off = (unsigned long)block;
+ vec[0].sfv_len = DSI_BLOCKSIZ;
+ vec[1].sfv_fd = fromfd;
+ vec[1].sfv_flag = 0;
+ vec[1].sfv_off = offset;
+ vec[1].sfv_len = length;
+#else
+ dsi_stream_write(dsi, block, sizeof(block), DSI_MSG_MORE);
+#endif
- while (written < length) {
- len = sys_sendfile(dsi->socket, fromfd, &offset, length - written);
-
- if (len < 0) {
- if (errno == EINTR)
- continue;
- if (errno == EINVAL || errno == ENOSYS)
- return -1;
-
- if (errno == EAGAIN || errno == EWOULDBLOCK) {
- if (dsi_peek(dsi)) {
- /* can't go back to blocking mode, exit, the next read
- will return with an error and afpd will die.
- */
- break;
- }
- continue;
- }
- LOG(log_error, logtype_dsi, "dsi_stream_read_file: %s", strerror(errno));
- break;
- }
- else if (!len) {
- /* afpd is going to exit */
- errno = EIO;
- return -1; /* I think we're at EOF here... */
- }
- else
+ while (written < total) {
+#ifdef HAVE_SENDFILEV
+ nwritten = 0;
+ len = sendfilev(dsi->socket, vec, sfvcnt, &nwritten);
+#else
+ len = sys_sendfile(dsi->socket, fromfd, &pos, total - written);
+#endif
+ if (len < 0) {
+ switch (errno) {
+ case EINTR:
+ case EAGAIN:
+ len = 0;
+#ifdef HAVE_SENDFILEV
+ len = (size_t)nwritten;
+#else
+#if defined(SOLARIS) || defined(FREEBSD)
+ if (pos > offset) {
+ /* we actually have sent sth., adjust counters and keep trying */
+ len = pos - offset;
+ offset = pos;
+ }
+#endif /* defined(SOLARIS) || defined(FREEBSD) */
+#endif /* HAVE_SENDFILEV */
+
+ if (dsi_peek(dsi) != 0) {
+ ret = -1;
+ goto exit;
+ }
+ break;
+ default:
+ LOG(log_error, logtype_dsi, "dsi_stream_read_file: %s", strerror(errno));
+ ret = -1;
+ goto exit;
+ }
+ } else if (len == 0) {
+ /* afpd is going to exit */
+ ret = -1;
+ goto exit;
+ }
+#ifdef HAVE_SENDFILEV
+ if (sfvcnt == 2 && len >= vec[0].sfv_len) {
+ vec[1].sfv_off += len - vec[0].sfv_len;
+ vec[1].sfv_len -= len - vec[0].sfv_len;
+
+ vec[0] = vec[1];
+ sfvcnt = 1;
+ } else {
+ vec[0].sfv_off += len;
+ vec[0].sfv_len -= len;
+ }
+#endif /* HAVE_SENDFILEV */
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_read_file: wrote: %zd", len);
written += len;
- }
+ }
+#ifdef HAVE_SENDFILEV
+ written -= DSI_BLOCKSIZ;
+#endif
+ dsi->write_count += written;
- dsi->write_count += written;
- dsi->in_write--;
- return written;
+exit:
+ dsi->in_write--;
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_read_file: written: %zd", written);
+ if (ret != 0)
+ return -1;
+ return written;
}
#endif
stored = 0;
while (stored < length) {
- len = buf_read(dsi, (u_int8_t *) data + stored, length - stored);
+ len = buf_read(dsi, (uint8_t *) data + stored, length - stored);
if (len == -1 && (errno == EINTR || errno == EAGAIN)) {
- LOG(log_debug, logtype_dsi, "dsi_stream_read: select read loop");
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_read: select read loop");
continue;
} else if (len > 0) {
stored += len;
} else { /* eof or error */
/* don't log EOF error if it's just after connect (OSX 10.3 probe) */
+#if 0
+ if (errno == ECONNRESET)
+ dsi->flags |= DSI_GOT_ECONNRESET;
+#endif
if (len || stored || dsi->read_count) {
if (! (dsi->flags & DSI_DISCONNECTED)) {
LOG(log_error, logtype_dsi, "dsi_stream_read: len:%d, %s",
size_t towrite;
ssize_t len;
- LOG(log_maxdebug, logtype_dsi, "dsi_stream_send: %u bytes",
- length ? length : sizeof(block));
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_send(%u bytes): START", length);
if (dsi->flags & DSI_DISCONNECTED)
return 0;
- block[0] = dsi->header.dsi_flags;
- block[1] = dsi->header.dsi_command;
- memcpy(block + 2, &dsi->header.dsi_requestID,
- sizeof(dsi->header.dsi_requestID));
- memcpy(block + 4, &dsi->header.dsi_code, sizeof(dsi->header.dsi_code));
- memcpy(block + 8, &dsi->header.dsi_len, sizeof(dsi->header.dsi_len));
- memcpy(block + 12, &dsi->header.dsi_reserved,
- sizeof(dsi->header.dsi_reserved));
+ dsi_header_pack_reply(dsi, block);
if (!length) { /* just write the header */
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_send(%u bytes): DSI header, no data", sizeof(block));
length = (dsi_stream_write(dsi, block, sizeof(block), 0) == sizeof(block));
return length; /* really 0 on failure, 1 on success */
}
break;
else if (len < 0) { /* error */
if (errno == EAGAIN || errno == EWOULDBLOCK) {
- if (!dsi_peek(dsi)) {
+ if (dsi_peek(dsi) == 0) {
continue;
}
}
iov[1].iov_len -= len;
}
}
+
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_send(%u bytes): END", length);
unblock_sig(dsi);
return 1;
}
-/* ---------------------------------------
- * read data. function on success. 0 on failure. data length gets
- * stored in length variable. this should really use size_t's, but
- * that would require changes elsewhere. */
-int dsi_stream_receive(DSI *dsi, void *buf, const size_t ilength,
- size_t *rlength)
+/*!
+ * Read DSI command and data
+ *
+ * @param dsi (rw) DSI handle
+ *
+ * @return DSI function on success, 0 on failure
+ */
+int dsi_stream_receive(DSI *dsi)
{
char block[DSI_BLOCKSIZ];
- LOG(log_maxdebug, logtype_dsi, "dsi_stream_receive: %u bytes", ilength);
+ LOG(log_maxdebug, logtype_dsi, "dsi_stream_receive: START");
if (dsi->flags & DSI_DISCONNECTED)
return 0;
/* read in the header */
- if (dsi_buffered_stream_read(dsi, (u_int8_t *)block, sizeof(block)) != sizeof(block))
+ if (dsi_buffered_stream_read(dsi, (uint8_t *)block, sizeof(block)) != sizeof(block))
return 0;
dsi->header.dsi_flags = block[0];
dsi->header.dsi_command = block[1];
- /* FIXME, not the right place,
- but we get a server disconnect without reason in the log
- */
- if (!block[1]) {
- LOG(log_error, logtype_dsi, "dsi_stream_receive: invalid packet, fatal");
+
+ if (dsi->header.dsi_command == 0)
return 0;
- }
- memcpy(&dsi->header.dsi_requestID, block + 2,
- sizeof(dsi->header.dsi_requestID));
+ memcpy(&dsi->header.dsi_requestID, block + 2, sizeof(dsi->header.dsi_requestID));
memcpy(&dsi->header.dsi_code, block + 4, sizeof(dsi->header.dsi_code));
memcpy(&dsi->header.dsi_len, block + 8, sizeof(dsi->header.dsi_len));
- memcpy(&dsi->header.dsi_reserved, block + 12,
- sizeof(dsi->header.dsi_reserved));
+ memcpy(&dsi->header.dsi_reserved, block + 12, sizeof(dsi->header.dsi_reserved));
dsi->clientID = ntohs(dsi->header.dsi_requestID);
/* make sure we don't over-write our buffers. */
- *rlength = min(ntohl(dsi->header.dsi_len), ilength);
- if (dsi_stream_read(dsi, buf, *rlength) != *rlength)
+ dsi->cmdlen = MIN(ntohl(dsi->header.dsi_len), dsi->server_quantum);
+ if (dsi_stream_read(dsi, dsi->commands, dsi->cmdlen) != dsi->cmdlen)
return 0;
+ LOG(log_debug, logtype_dsi, "dsi_stream_receive: DSI cmdlen: %zd", dsi->cmdlen);
+
return block[1];
}
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