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efs: convert efs to use the new mount api

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Convert the efs filesystem to use the new mount API.

Signed-off-by: Bill O'Donnell <bodonnel@redhat.com>
Link: https://lore.kernel.org/r/20240220003318.166143-1-bodonnel@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Bill O'Donnell 2024-02-19 18:33:18 -06:00 committed by Christian Brauner
parent ddb9fd7a54
commit 39a6c668e4
1 changed files with 84 additions and 30 deletions
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114
fs/efs/super.c
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@ -14,19 +14,14 @@
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/blkdev.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
#include "efs.h"
#include <linux/efs_vh.h>
#include <linux/efs_fs_sb.h>
static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
static int efs_fill_super(struct super_block *s, void *d, int silent);
static struct dentry *efs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
return mount_bdev(fs_type, flags, dev_name, data, efs_fill_super);
}
static int efs_init_fs_context(struct fs_context *fc);
static void efs_kill_sb(struct super_block *s)
{
@ -35,15 +30,6 @@ static void efs_kill_sb(struct super_block *s)
kfree(sbi);
}
static struct file_system_type efs_fs_type = {
.owner = THIS_MODULE,
.name = "efs",
.mount = efs_mount,
.kill_sb = efs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("efs");
static struct pt_types sgi_pt_types[] = {
{0x00, "SGI vh"},
{0x01, "SGI trkrepl"},
@ -63,6 +49,27 @@ static struct pt_types sgi_pt_types[] = {
{0, NULL}
};
enum {
Opt_explicit_open,
};
static const struct fs_parameter_spec efs_param_spec[] = {
fsparam_flag ("explicit-open", Opt_explicit_open),
{}
};
/*
* File system definition and registration.
*/
static struct file_system_type efs_fs_type = {
.owner = THIS_MODULE,
.name = "efs",
.kill_sb = efs_kill_sb,
.fs_flags = FS_REQUIRES_DEV,
.init_fs_context = efs_init_fs_context,
.parameters = efs_param_spec,
};
MODULE_ALIAS_FS("efs");
static struct kmem_cache * efs_inode_cachep;
@ -108,18 +115,10 @@ static void destroy_inodecache(void)
kmem_cache_destroy(efs_inode_cachep);
}
static int efs_remount(struct super_block *sb, int *flags, char *data)
{
sync_filesystem(sb);
*flags |= SB_RDONLY;
return 0;
}
static const struct super_operations efs_superblock_operations = {
.alloc_inode = efs_alloc_inode,
.free_inode = efs_free_inode,
.statfs = efs_statfs,
.remount_fs = efs_remount,
};
static const struct export_operations efs_export_ops = {
@ -249,26 +248,26 @@ static int efs_validate_super(struct efs_sb_info *sb, struct efs_super *super) {
return 0;
}
static int efs_fill_super(struct super_block *s, void *d, int silent)
static int efs_fill_super(struct super_block *s, struct fs_context *fc)
{
struct efs_sb_info *sb;
struct buffer_head *bh;
struct inode *root;
sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
sb = kzalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
if (!sb)
return -ENOMEM;
s->s_fs_info = sb;
s->s_time_min = 0;
s->s_time_max = U32_MAX;
s->s_magic = EFS_SUPER_MAGIC;
if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
pr_err("device does not support %d byte blocks\n",
EFS_BLOCKSIZE);
return -EINVAL;
}
/* read the vh (volume header) block */
bh = sb_bread(s, 0);
@ -294,7 +293,7 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
pr_err("cannot read superblock\n");
return -EIO;
}
if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
#ifdef DEBUG
pr_warn("invalid superblock at block %u\n",
@ -328,6 +327,61 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
return 0;
}
static void efs_free_fc(struct fs_context *fc)
{
kfree(fc->fs_private);
}
static int efs_get_tree(struct fs_context *fc)
{
return get_tree_bdev(fc, efs_fill_super);
}
static int efs_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
int token;
struct fs_parse_result result;
token = fs_parse(fc, efs_param_spec, param, &result);
if (token < 0)
return token;
return 0;
}
static int efs_reconfigure(struct fs_context *fc)
{
sync_filesystem(fc->root->d_sb);
return 0;
}
struct efs_context {
unsigned long s_mount_opts;
};
static const struct fs_context_operations efs_context_opts = {
.parse_param = efs_parse_param,
.get_tree = efs_get_tree,
.reconfigure = efs_reconfigure,
.free = efs_free_fc,
};
/*
* Set up the filesystem mount context.
*/
static int efs_init_fs_context(struct fs_context *fc)
{
struct efs_context *ctx;
ctx = kzalloc(sizeof(struct efs_context), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
fc->fs_private = ctx;
fc->ops = &efs_context_opts;
return 0;
}
static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
struct super_block *sb = dentry->d_sb;
struct efs_sb_info *sbi = SUPER_INFO(sb);