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- move the extra-stat() out of the main-path 

it was only used to detect file-shrinks, but also resulted in interupted 
  transfers if the file was removed, but still open.
- we detect file-shrinks now if sendfile() returns 0


git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-merge-1.4.x@998 152afb58-edef-0310-8abb-c4023f1b3aa9
svn/tags/lighttpd-1.4.11
Jan Kneschke 2006-02-15 10:46:17 +00:00
parent 7e861ea32e
commit f965cd20ae
1 changed files with 15 additions and 15 deletions
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30
src/network_linux_sendfile.c
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@ -132,23 +132,11 @@ int network_write_chunkqueue_linuxsendfile(server *srv, connection *con, int fd,
size_t toSend;
stat_cache_entry *sce = NULL;
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, c->file.name, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
strerror(errno), c->file.name);
return -1;
}
offset = c->file.start + c->offset;
/* limit the toSend to 2^31-1 bytes in a chunk */
toSend = c->file.length - c->offset > ((1 << 30) - 1) ?
((1 << 30) - 1) : c->file.length - c->offset;
if (offset > sce->st.st_size) {
log_error_write(srv, __FILE__, __LINE__, "sb", "file was shrinked:", c->file.name);
return -1;
}
/* open file if not already opened */
if (-1 == c->file.fd) {
if (-1 == (c->file.fd = open(c->file.name->ptr, O_RDONLY))) {
@ -170,8 +158,6 @@ int network_write_chunkqueue_linuxsendfile(server *srv, connection *con, int fd,
#endif
}
/* Linux sendfile() */
if (-1 == (r = sendfile(fd, c->file.fd, &offset, toSend))) {
switch (errno) {
case EAGAIN:
@ -189,7 +175,21 @@ int network_write_chunkqueue_linuxsendfile(server *srv, connection *con, int fd,
}
if (r == 0) {
/* we got a event to write put we couldn't. remote side closed ? */
/* We got an event to write but we wrote nothing
*
* - the file shrinked -> error
* - the remote side closed inbetween -> remote-close */
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, c->file.name, &sce)) {
/* file is gone ? */
return -1;
}
if (abs_offset > sce->st.st_size) {
/* file shrinked, close the connection */
return -1;
}
return -2;
}