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UPSTREAM: vfs: Convert pipe to use the new mount API

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Convert the pipe filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Change-Id: I2d3e6c53b6fca8e5ace1096aabf09e9f0f5b13ae
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells
2019-03-25 16:38:23 +00:00
committed by bengris32
parent 0d5b349c8b
commit b48237fdd1
1 changed files with 10 additions and 5 deletions
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15
fs/pipe.c
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@@ -14,6 +14,7 @@
#include <linux/fs.h>
#include <linux/log2.h>
#include <linux/mount.h>
#include <linux/pseudo_fs.h>
#include <linux/magic.h>
#include <linux/pipe_fs_i.h>
#include <linux/uio.h>
@@ -1186,16 +1187,20 @@ static const struct super_operations pipefs_ops = {
* any operations on the root directory. However, we need a non-trivial
* d_name - pipe: will go nicely and kill the special-casing in procfs.
*/
static struct dentry *pipefs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
static int pipefs_init_fs_context(struct fs_context *fc)
{
return mount_pseudo(fs_type, &pipefs_ops,
&pipefs_dentry_operations, PIPEFS_MAGIC);
struct pseudo_fs_context *ctx = init_pseudo(fc, PIPEFS_MAGIC);
if (!ctx)
return -ENOMEM;
ctx->ops = &pipefs_ops;
ctx->dops = &pipefs_dentry_operations;
return 0;
}
static struct file_system_type pipe_fs_type = {
.name = "pipefs",
.mount = pipefs_mount,
.init_fs_context = pipefs_init_fs_context,
.kill_sb = kill_anon_super,
};