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| author |   Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:55 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:59 +0200 |
| commit | 55731b3cda3a85ee888dac3bf1f36489f275c187 (patch) | |
| tree | a322dc9efdd89932a35b294d221f90eccad45f23 /fs/internal.h | |
| parent | fs: add do_faccessat() helper and ksys_access() wrapper; remove in-kernel calls to syscall (diff) | |
| download | linux-dev-55731b3cda3a85ee888dac3bf1f36489f275c187.tar.xz linux-dev-55731b3cda3a85ee888dac3bf1f36489f275c187.zip | |
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 '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 26f4f05b52ef..c797480cbd6f 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -121,6 +121,8 @@ extern struct file *do_file_open_root(struct dentry *, struct vfsmount *, long do_faccessat(int dfd, const char __user *filename, int mode); int do_fchmodat(int dfd, const char __user *filename, umode_t mode); +int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, + int flag); extern int open_check_o_direct(struct file *f); extern int vfs_open(const struct path *, struct file *, const struct cred *); |