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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:55 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:15:59 +0200
commit55731b3cda3a85ee888dac3bf1f36489f275c187 (patch)
treea322dc9efdd89932a35b294d221f90eccad45f23 /init
parentcbfe20f565228966f0249f016752437df95df679 (diff)
downloadlinux-55731b3cda3a85ee888dac3bf1f36489f275c187.tar.gz
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 <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'init')
-rw-r--r--init/initramfs.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/init/initramfs.c b/init/initramfs.c
index 16c3c23076e2..35173bef7c00 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;