#define _GNU_SOURCE
#include <assert.h>
-#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
+#include <sys/stat.h>
#include <common/common.h>
#include <common/kernel-ctl/kernel-ctl.h>
#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/compat/fcntl.h>
#include "kernel-consumer.h"
*
* Returns the number of bytes written
*/
-int lttng_kconsumer_on_read_subbuffer_mmap(
+ssize_t lttng_kconsumer_on_read_subbuffer_mmap(
struct lttng_consumer_local_data *ctx,
struct lttng_consumer_stream *stream, unsigned long len)
{
unsigned long mmap_offset;
- long ret = 0;
+ ssize_t ret = 0;
off_t orig_offset = stream->out_fd_offset;
int fd = stream->wait_fd;
int outfd = stream->out_fd;
/* get the offset inside the fd to mmap */
ret = kernctl_get_mmap_read_offset(fd, &mmap_offset);
if (ret != 0) {
- ret = -errno;
+ errno = -ret;
perror("kernctl_get_mmap_read_offset");
goto end;
}
if (ret >= len) {
len = 0;
} else if (ret < 0) {
- ret = -errno;
+ errno = -ret;
perror("Error in file write");
goto end;
}
/* This won't block, but will start writeout asynchronously */
- sync_file_range(outfd, stream->out_fd_offset, ret,
+ lttng_sync_file_range(outfd, stream->out_fd_offset, ret,
SYNC_FILE_RANGE_WRITE);
stream->out_fd_offset += ret;
}
*
* Returns the number of bytes spliced.
*/
-int lttng_kconsumer_on_read_subbuffer_splice(
+ssize_t lttng_kconsumer_on_read_subbuffer_splice(
struct lttng_consumer_local_data *ctx,
struct lttng_consumer_stream *stream, unsigned long len)
{
- long ret = 0;
+ ssize_t ret = 0;
loff_t offset = 0;
off_t orig_offset = stream->out_fd_offset;
int fd = stream->wait_fd;
(unsigned long)offset, fd);
ret = splice(fd, &offset, ctx->consumer_thread_pipe[1], NULL, len,
SPLICE_F_MOVE | SPLICE_F_MORE);
- DBG("splice chan to pipe ret %ld", ret);
+ DBG("splice chan to pipe ret %zd", ret);
if (ret < 0) {
- ret = errno;
+ errno = -ret;
perror("Error in relay splice");
goto splice_error;
}
ret = splice(ctx->consumer_thread_pipe[0], NULL, outfd, NULL, ret,
SPLICE_F_MOVE | SPLICE_F_MORE);
- DBG("splice pipe to file %ld", ret);
+ DBG("splice pipe to file %zd", ret);
if (ret < 0) {
- ret = errno;
+ errno = -ret;
perror("Error in file splice");
goto splice_error;
}
len -= ret;
/* This won't block, but will start writeout asynchronously */
- sync_file_range(outfd, stream->out_fd_offset, ret,
+ lttng_sync_file_range(outfd, stream->out_fd_offset, ret,
SYNC_FILE_RANGE_WRITE);
stream->out_fd_offset += ret;
}
ret = kernctl_snapshot(infd);
if (ret != 0) {
- ret = errno;
+ errno = -ret;
perror("Getting sub-buffer snapshot.");
}
ret = kernctl_snapshot_get_produced(infd, pos);
if (ret != 0) {
- ret = errno;
+ errno = -ret;
perror("kernctl_snapshot_get_produced");
}
/*
* Consume data on a file descriptor and write it on a trace file.
*/
-int lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
+ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
struct lttng_consumer_local_data *ctx)
{
unsigned long len;
int err;
- long ret = 0;
+ ssize_t ret = 0;
int infd = stream->wait_fd;
DBG("In read_subbuffer (infd : %d)", infd);
/* Get the next subbuffer */
err = kernctl_get_next_subbuf(infd);
if (err != 0) {
- ret = errno;
/*
* This is a debug message even for single-threaded consumer,
* because poll() have more relaxed criterions than get subbuf,
/* read the whole subbuffer */
err = kernctl_get_padded_subbuf_size(infd, &len);
if (err != 0) {
- ret = errno;
+ errno = -ret;
perror("Getting sub-buffer len failed.");
goto end;
}
/* read the used subbuffer size */
err = kernctl_get_padded_subbuf_size(infd, &len);
if (err != 0) {
- ret = errno;
+ errno = -ret;
perror("Getting sub-buffer len failed.");
goto end;
}
err = kernctl_put_next_subbuf(infd);
if (err != 0) {
- ret = errno;
+ errno = -ret;
if (errno == EFAULT) {
perror("Error in unreserving sub buffer\n");
} else if (errno == EIO) {
ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len);
if (ret != 0) {
- ret = errno;
+ errno = -ret;
perror("kernctl_get_mmap_len");
goto error_close_fd;
}