diff mbox series

[RFC,-next,08/10] fs: Add sendfile flags for sendfile2

Message ID 20250319001521.53249-9-jdamato@fastly.com (mailing list archive)
State RFC
Headers show
Series Add ZC notifications to splice and sendfile | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success Errors and warnings before: 26 (+0) this patch: 26 (+0)
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 1 this patch: 1
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 5 this patch: 5
netdev/checkpatch warning CHECK: spaces preferred around that '|' (ctx:VxV) WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 9 this patch: 9
netdev/source_inline success Was 0 now: 0

Commit Message

Joe Damato March 19, 2025, 12:15 a.m. UTC 
Add a default flag (SENDFILE_DEFAULT) and a flag for requesting zerocopy
notifications (SENDFILE_ZC). do_sendfile is updated to pass through the
corresponding splice flag to enable zerocopy notifications.

Signed-off-by: Joe Damato <jdamato@fastly.com>
---
 fs/read_write.c          |  5 +++++
 include/linux/sendfile.h | 10 ++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 include/linux/sendfile.h
diff mbox series

Patch

diff --git a/fs/read_write.c b/fs/read_write.c
index 057e5f37645d..e3929fd0f605 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -16,6 +16,7 @@ 
 #include <linux/export.h>
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
+#include <linux/sendfile.h>
 #include <linux/splice.h>
 #include <linux/compat.h>
 #include <linux/mount.h>
@@ -1360,6 +1361,10 @@  static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 		retval = rw_verify_area(WRITE, fd_file(out), &out_pos, count);
 		if (retval < 0)
 			return retval;
+
+		if (flags & SENDFILE_ZC)
+			fl |= SPLICE_F_ZC;
+
 		retval = do_splice_direct(fd_file(in), &pos, fd_file(out), &out_pos,
 					  count, fl);
 	} else {
diff --git a/include/linux/sendfile.h b/include/linux/sendfile.h
new file mode 100644
index 000000000000..0bd3c76ea6f2
--- /dev/null
+++ b/include/linux/sendfile.h
@@ -0,0 +1,10 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef SENDFILE_H
+#define SENDFILE_H
+
+#define SENDFILE_DEFAULT (0x1)  /* normal sendfile */
+#define SENDFILE_ZC (0x2)       /* sendfile which generates ZC notifications */
+
+#define SENDFILE_ALL (SENDFILE_DEFAULT|SENDFILE_ZC)
+
+#endif