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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:53 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:57 +0200 |
| commit | 46ea89eb652a365e10257016d09dcf1aaf23cf63 (patch) | |
| tree | 4bee67aac3e8b19f76aa076ed863f6336013c945 /fs/internal.h | |
| parent | 87c4e19262d81862886207be3c8795f6576d5a52 (diff) | |
| download | linux-stable-46ea89eb652a365e10257016d09dcf1aaf23cf63.tar.gz linux-stable-46ea89eb652a365e10257016d09dcf1aaf23cf63.tar.bz2 linux-stable-46ea89eb652a365e10257016d09dcf1aaf23cf63.zip | |
fs: add do_linkat() helper and ksys_link() wrapper; remove in-kernel calls to syscall
Using the fs-internal do_linkat() helper allows us to get rid of
fs-internal calls to the sys_linkat() syscall.
Introducing the ksys_link() wrapper allows us to avoid the in-kernel
calls to sys_link() syscall. The ksys_ prefix denotes that this function
is meant as a drop-in replacement for the syscall. In particular, it uses
the same calling convention as sys_link().
In the near future, the only fs-external user of ksys_link() should be
converted to use vfs_link() instead.
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 'fs/internal.h')
| -rw-r--r-- | fs/internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/internal.h b/fs/internal.h index 4f0b67054c54..91e6fc93fcb5 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -62,6 +62,8 @@ long do_rmdir(int dfd, const char __user *pathname); long do_unlinkat(int dfd, struct filename *name); long do_symlinkat(const char __user *oldname, int newdfd, const char __user *newname); +int do_linkat(int olddfd, const char __user *oldname, int newdfd, + const char __user *newname, int flags); /* * namespace.c |