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init: add an init_mknod helper

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2020-07-22 11:41:20 +02:00
parent 83ff98c3e9
commit 5fee64fcde
8 changed files with 30 additions and 16 deletions
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25
fs/init.c
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@@ -122,6 +122,31 @@ int __init init_eaccess(const char *filename)
return error;
}
int __init init_mknod(const char *filename, umode_t mode, unsigned int dev)
{
struct dentry *dentry;
struct path path;
int error;
if (S_ISFIFO(mode) || S_ISSOCK(mode))
dev = 0;
else if (!(S_ISBLK(mode) || S_ISCHR(mode)))
return -EINVAL;
dentry = kern_path_create(AT_FDCWD, filename, &path, 0);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
if (!IS_POSIXACL(path.dentry->d_inode))
mode &= ~current_umask();
error = security_path_mknod(&path, dentry, mode, dev);
if (!error)
error = vfs_mknod(path.dentry->d_inode, dentry, mode,
new_decode_dev(dev));
done_path_create(&path, dentry);
return error;
}
int __init init_link(const char *oldname, const char *newname)
{
struct dentry *new_dentry;