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init: add an init_unlink helper

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Add a simple helper to unlink with a kernel space file name and switch
the early init code over to it.  Remove the now unused ksys_unlink.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2020-07-23 08:23:40 +02:00
parent 09267defa3
commit 8fb9f73e5a
7 changed files with 12 additions and 12 deletions
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5
fs/init.c
View File

@ -37,3 +37,8 @@ int __init init_umount(const char *name, int flags)
return ret; return ret;
return path_umount(&path, flags); return path_umount(&path, flags);
} }
int __init init_unlink(const char *pathname)
{
return do_unlinkat(AT_FDCWD, getname_kernel(pathname));
}

1
include/linux/init_syscalls.h
View File

@ -3,3 +3,4 @@
int __init init_mount(const char *dev_name, const char *dir_name, int __init init_mount(const char *dev_name, const char *dir_name,
const char *type_page, unsigned long flags, void *data_page); const char *type_page, unsigned long flags, void *data_page);
int __init init_umount(const char *name, int flags); int __init init_umount(const char *name, int flags);
int __init init_unlink(const char *pathname);

7
include/linux/syscalls.h
View File

@ -1273,13 +1273,6 @@ int compat_ksys_ipc(u32 call, int first, int second,
* The following kernel syscall equivalents are just wrappers to fs-internal * The following kernel syscall equivalents are just wrappers to fs-internal
* functions. Therefore, provide stubs to be inlined at the callsites. * functions. Therefore, provide stubs to be inlined at the callsites.
*/ */
extern long do_unlinkat(int dfd, struct filename *name);
static inline long ksys_unlink(const char __user *pathname)
{
return do_unlinkat(AT_FDCWD, getname(pathname));
}
long do_rmdir(int dfd, struct filename *name); long do_rmdir(int dfd, struct filename *name);
static inline long ksys_rmdir(const char __user *pathname) static inline long ksys_rmdir(const char __user *pathname)

2
init/do_mounts.h
View File

@ -16,7 +16,7 @@ extern int root_mountflags;
static inline __init int create_dev(char *name, dev_t dev) static inline __init int create_dev(char *name, dev_t dev)
{ {
ksys_unlink(name); init_unlink(name);
return ksys_mknod(name, S_IFBLK|0600, new_encode_dev(dev)); return ksys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
} }

4
init/do_mounts_initrd.c
View File

@ -137,11 +137,11 @@ bool __init initrd_load(void)
* mounted in the normal path. * mounted in the normal path.
*/ */
if (rd_load_image("/initrd.image") && ROOT_DEV != Root_RAM0) { if (rd_load_image("/initrd.image") && ROOT_DEV != Root_RAM0) {
ksys_unlink("/initrd.image"); init_unlink("/initrd.image");
handle_initrd(); handle_initrd();
return true; return true;
} }
} }
ksys_unlink("/initrd.image"); init_unlink("/initrd.image");
return false; return false;
} }

2
init/do_mounts_rd.c
View File

@ -272,7 +272,7 @@ noclose_input:
fput(out_file); fput(out_file);
out: out:
kfree(buf); kfree(buf);
ksys_unlink("/dev/ram"); init_unlink("/dev/ram");
return res; return res;
} }

3
init/initramfs.c
View File

@ -12,6 +12,7 @@
#include <linux/file.h> #include <linux/file.h>
#include <linux/memblock.h> #include <linux/memblock.h>
#include <linux/namei.h> #include <linux/namei.h>
#include <linux/init_syscalls.h>
static ssize_t __init xwrite(struct file *file, const char *p, size_t count, static ssize_t __init xwrite(struct file *file, const char *p, size_t count,
loff_t *pos) loff_t *pos)
@ -301,7 +302,7 @@ static void __init clean_path(char *path, umode_t fmode)
if (S_ISDIR(st.mode)) if (S_ISDIR(st.mode))
ksys_rmdir(path); ksys_rmdir(path);
else else
ksys_unlink(path); init_unlink(path);
} }
} }