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authorRaghavendra G <raghavendra@zresearch.com>2009-06-11 04:58:30 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-06-11 07:28:59 -0700
commitee22651f34b467859959b17b881da465001c6bc8 (patch)
tree93cc8fce407d35c01375f3cab76656e1ec45654d /libglusterfsclient/src/libglusterfsclient.h
parent29a3619d6bb5680213c817b13dad7d8ad6e2903b (diff)
libglusterfsclient: implement glusterfs_sendfile.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
Diffstat (limited to 'libglusterfsclient/src/libglusterfsclient.h')
-rwxr-xr-xlibglusterfsclient/src/libglusterfsclient.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/libglusterfsclient/src/libglusterfsclient.h b/libglusterfsclient/src/libglusterfsclient.h
index 9e03a8c59ac..e8b19f4bc51 100755
--- a/libglusterfsclient/src/libglusterfsclient.h
+++ b/libglusterfsclient/src/libglusterfsclient.h
@@ -1234,6 +1234,32 @@ glusterfs_seekdir (glusterfs_dir_t dirfd, off_t offset);
*/
off_t
glusterfs_telldir (glusterfs_dir_t dirfd);
+
+
+/* Write count bytes from in_fd to out_fd, starting at *offset.
+ * glusterfs_sendfile aims at eliminating memory copy at the end of
+ * each read from in_fd, copying the file directly to out_fd from the buffer
+ * provided by glusterfs.
+ *
+ * @out_fd: file descriptor opened for writing
+ *
+ * @in_fd: glusterfs file handle to the file to be read from.
+ *
+ * @offset: If offset is not NULL, then it points to a variable holding the file
+ * offset from which glusterfs_sendfile() will start reading data
+ * from in_fd. When glusterfs_sendfile() returns, this variable will
+ * be set to the offset of the byte following the last byte that was
+ * read. If offset is not NULL, then glusterfs_sendfile() does not
+ * modify the current file offset of in_fd; otherwise the current file
+ * offset is adjusted to reflect the number of bytes read from in_fd.
+ *
+ * @count: number of bytes to copy between the file descriptors.
+ */
+
+ssize_t
+glusterfs_sendfile (int out_fd, glusterfs_file_t in_fd, off_t *offset,
+ size_t count);
+
/* FIXME: review the need for these apis */
/* added for log related initialization in booster fork implementation */
void