From 55731b3cda3a85ee888dac3bf1f36489f275c187 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Sun, 11 Mar 2018 11:34:55 +0100 Subject: fs: add do_fchownat(), ksys_fchown() helpers and ksys_{,l}chown() wrappers Using the fs-interal do_fchownat() wrapper allows us to get rid of fs-internal calls to the sys_fchownat() syscall. Introducing the ksys_fchown() helper and the ksys_{,}chown() wrappers allows us to avoid the in-kernel calls to the sys_{,l,f}chown() syscalls. The ksys_ prefix denotes that these functions are meant as a drop-in replacement for the syscalls. In particular, they use the same calling convention as sys_{,l,f}chown(). This patch is part of a series which removes in-kernel calls to syscalls. On this basis, the syscall entry path can be streamlined. For details, see http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net Cc: Al Viro Cc: Andrew Morton Signed-off-by: Dominik Brodowski --- init/initramfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'init') diff --git a/init/initramfs.c b/init/initramfs.c index 16c3c23..35173be 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -343,7 +343,7 @@ static int __init do_name(void) wfd = sys_open(collected, openflags, mode); if (wfd >= 0) { - sys_fchown(wfd, uid, gid); + ksys_fchown(wfd, uid, gid); ksys_fchmod(wfd, mode); if (body_len) sys_ftruncate(wfd, body_len); @@ -353,14 +353,14 @@ static int __init do_name(void) } } else if (S_ISDIR(mode)) { ksys_mkdir(collected, mode); - sys_chown(collected, uid, gid); + ksys_chown(collected, uid, gid); ksys_chmod(collected, mode); dir_add(collected, mtime); } else if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { if (maybe_link() == 0) { ksys_mknod(collected, mode, rdev); - sys_chown(collected, uid, gid); + ksys_chown(collected, uid, gid); ksys_chmod(collected, mode); do_utime(collected, mtime); } @@ -393,7 +393,7 @@ static int __init do_symlink(void) collected[N_ALIGN(name_len) + body_len] = '\0'; clean_path(collected, 0); ksys_symlink(collected + N_ALIGN(name_len), collected); - sys_lchown(collected, uid, gid); + ksys_lchown(collected, uid, gid); do_utime(collected, mtime); state = SkipIt; next_state = Reset; -- cgit v1.1