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Fix for the 6.18 kernel. The mount_nodev() function has been removed, so a local copy is used. #31

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Merged
abbbi merged 1 commit into from
Oct 11, 2025
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Fix for the 6.18 kernel. The mount_nodev() function has been removed, so a local copy is used. #31

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32 changes: 32 additions & 0 deletions nullfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -618,7 +618,11 @@ int nullfs_statfs(struct dentry *dentry, struct kstatfs *buf)

static const struct super_operations nullfs_ops = {
.statfs = nullfs_statfs,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 18, 0)
.drop_inode = inode_just_drop,
#else
.drop_inode = generic_delete_inode,
#endif
.show_options = nullfs_show_options
};

Expand Down Expand Up @@ -665,10 +669,38 @@ static void nullfs_kill_sb(struct super_block *sb)
kill_litter_super(sb);
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 18, 0)
extern struct dentry *nullfs_mount_nodev(struct file_system_type *,
int, void *, int (*fill_super)(struct super_block *, void *, int));

struct dentry *nullfs_mount_nodev(struct file_system_type *fs_type,
int flags, void *data,
int (*fill_super)(struct super_block *, void *, int))
{
int error;
struct super_block *s = sget(fs_type, NULL, set_anon_super, flags, NULL);

if (IS_ERR(s))
return ERR_CAST(s);

error = fill_super(s, data, flags & SB_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(s);
return ERR_PTR(error);
}
s->s_flags |= SB_ACTIVE;
return dget(s->s_root);
}
#endif

static struct dentry * nullfs_get_super(struct file_system_type *fst,
int flags, const char *devname, void *data)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 18, 0)
return nullfs_mount_nodev(fst, flags, data, nullfs_fill_super);
#else
return mount_nodev(fst, flags, data, nullfs_fill_super);
#endif
}

static struct file_system_type nullfs_type = {
Expand Down