[RFC -next 06/10] fs: Extend do_sendfile to take a flags argument
From: Joe Damato <hidden>
Date: 2025-03-19 00:15:46
Also in:
linux-arch, linux-fsdevel, linux-kselftest, lkml, netdev
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Extend the internal do_sendfile to take a flags argument, which will be used in future commits to signal that userland wants zerocopy notifications. This commit does not change anything about sendfile or sendfile64. Signed-off-by: Joe Damato <redacted> --- fs/read_write.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index a6133241dfb8..03d2a93c3d1b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c@@ -1293,7 +1293,7 @@ COMPAT_SYSCALL_DEFINE6(pwritev2, compat_ulong_t, fd, #endif /* CONFIG_COMPAT */ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, - size_t count, loff_t max) + size_t count, loff_t max, int flags) { struct inode *in_inode, *out_inode; struct pipe_inode_info *opipe;
@@ -1398,13 +1398,13 @@ SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd, off_t __user *, offset, size_ if (unlikely(get_user(off, offset))) return -EFAULT; pos = off; - ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS); + ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS, 0); if (unlikely(put_user(pos, offset))) return -EFAULT; return ret; } - return do_sendfile(out_fd, in_fd, NULL, count, 0); + return do_sendfile(out_fd, in_fd, NULL, count, 0, 0); } SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, size_t, count)
@@ -1415,13 +1415,13 @@ SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, si if (offset) { if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t)))) return -EFAULT; - ret = do_sendfile(out_fd, in_fd, &pos, count, 0); + ret = do_sendfile(out_fd, in_fd, &pos, count, 0, 0); if (unlikely(put_user(pos, offset))) return -EFAULT; return ret; } - return do_sendfile(out_fd, in_fd, NULL, count, 0); + return do_sendfile(out_fd, in_fd, NULL, count, 0, 0); } #ifdef CONFIG_COMPAT
@@ -1436,13 +1436,13 @@ COMPAT_SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd, if (unlikely(get_user(off, offset))) return -EFAULT; pos = off; - ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS); + ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS, 0); if (unlikely(put_user(pos, offset))) return -EFAULT; return ret; } - return do_sendfile(out_fd, in_fd, NULL, count, 0); + return do_sendfile(out_fd, in_fd, NULL, count, 0, 0); } COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
@@ -1454,13 +1454,13 @@ COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, if (offset) { if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t)))) return -EFAULT; - ret = do_sendfile(out_fd, in_fd, &pos, count, 0); + ret = do_sendfile(out_fd, in_fd, &pos, count, 0, 0); if (unlikely(put_user(pos, offset))) return -EFAULT; return ret; } - return do_sendfile(out_fd, in_fd, NULL, count, 0); + return do_sendfile(out_fd, in_fd, NULL, count, 0, 0); } #endif
--
2.43.0