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    Subject[RFC PATCH 07/35] syscalls: do not call sys_renameat2() within the kernel
    Date
    CC: Alexander Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
    ---
    fs/namei.c | 14 ++++++++++----
    1 file changed, 10 insertions(+), 4 deletions(-)

    diff --git a/fs/namei.c b/fs/namei.c
    index 921ae32dbc80..524e829ffc7d 100644
    --- a/fs/namei.c
    +++ b/fs/namei.c
    @@ -4478,8 +4478,8 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
    }
    EXPORT_SYMBOL(vfs_rename);

    -SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
    - int, newdfd, const char __user *, newname, unsigned int, flags)
    +static int do_renameat2(int olddfd, const char __user *oldname, int newdfd,
    + const char __user *newname, unsigned int flags)
    {
    struct dentry *old_dentry, *new_dentry;
    struct dentry *trap;
    @@ -4621,15 +4621,21 @@ SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
    return error;
    }

    +SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
    + int, newdfd, const char __user *, newname, unsigned int, flags)
    +{
    + return do_renameat2(olddfd, oldname, newdfd, newname, flags);
    +}
    +
    SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
    int, newdfd, const char __user *, newname)
    {
    - return sys_renameat2(olddfd, oldname, newdfd, newname, 0);
    + return do_renameat2(olddfd, oldname, newdfd, newname, 0);
    }

    SYSCALL_DEFINE2(rename, const char __user *, oldname, const char __user *, newname)
    {
    - return sys_renameat2(AT_FDCWD, oldname, AT_FDCWD, newname, 0);
    + return do_renameat2(AT_FDCWD, oldname, AT_FDCWD, newname, 0);
    }

    int vfs_whiteout(struct inode *dir, struct dentry *dentry)
    --
    2.16.2
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