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zsfold: Convert zsfold to use the new mount API 

Convert the zsfold 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.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2019-05-21 07:55:45 +01:00 committed by Al Viro
parent 8e9231f819
commit ea8157ab2a
2 changed files with 6 additions and 5 deletions
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1
include/uapi/linux/magic.h
View File

@ -91,5 +91,6 @@
#define UDF_SUPER_MAGIC 0x15013346
#define BALLOON_KVM_MAGIC 0x13661366
#define ZSMALLOC_MAGIC 0x58295829
#define Z3FOLD_MAGIC 0x33
#endif /* __LINUX_MAGIC_H__ */

10
mm/z3fold.c
View File

@ -25,7 +25,6 @@
#include <linux/atomic.h>
#include <linux/sched.h>
#include <linux/cpumask.h>
#include <linux/dcache.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
@ -35,12 +34,14 @@
#include <linux/compaction.h>
#include <linux/percpu.h>
#include <linux/mount.h>
#include <linux/pseudo_fs.h>
#include <linux/fs.h>
#include <linux/preempt.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/zpool.h>
#include <linux/magic.h>
/*
* NCHUNKS_ORDER determines the internal allocation granularity, effectively
@ -239,15 +240,14 @@ static inline void free_handle(unsigned long handle)
}
}
static struct dentry *z3fold_do_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
static int z3fold_init_fs_context(struct fs_context *fc)
{
return mount_pseudo(fs_type, NULL, NULL, 0x33);
return init_pseudo(fc, Z3FOLD_MAGIC) ? 0 : -ENOMEM;
}
static struct file_system_type z3fold_fs = {
.name = "z3fold",
.mount = z3fold_do_mount,
.init_fs_context = z3fold_init_fs_context,
.kill_sb = kill_anon_super,
};