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linux-sg2042
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convert sysfs 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-07-26 13:30:36 +04:00
parent f7e835710a
commit d0e46f88b2
1 changed files with 13 additions and 19 deletions
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32
fs/sysfs/mount.c
View File

@ -23,7 +23,7 @@
#include "sysfs.h"
static struct vfsmount *sysfs_mount;
static struct vfsmount *sysfs_mnt;
struct kmem_cache *sysfs_dir_cachep;
static const struct super_operations sysfs_ops = {
@ -95,18 +95,17 @@ static int sysfs_set_super(struct super_block *sb, void *data)
return error;
}
static int sysfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
static struct dentry *sysfs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
struct sysfs_super_info *info;
enum kobj_ns_type type;
struct super_block *sb;
int error;
error = -ENOMEM;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
goto out;
return ERR_PTR(-ENOMEM);
for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++)
info->ns[type] = kobj_ns_current(type);
@ -114,24 +113,19 @@ static int sysfs_get_sb(struct file_system_type *fs_type,
sb = sget(fs_type, sysfs_test_super, sysfs_set_super, info);
if (IS_ERR(sb) || sb->s_fs_info != info)
kfree(info);
if (IS_ERR(sb)) {
error = PTR_ERR(sb);
goto out;
}
if (IS_ERR(sb))
return ERR_CAST(sb);
if (!sb->s_root) {
sb->s_flags = flags;
error = sysfs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (error) {
deactivate_locked_super(sb);
goto out;
return ERR_PTR(error);
}
sb->s_flags |= MS_ACTIVE;
}
simple_set_mnt(mnt, sb);
error = 0;
out:
return error;
return dget(sb->s_root);
}
static void sysfs_kill_sb(struct super_block *sb)
@ -147,7 +141,7 @@ static void sysfs_kill_sb(struct super_block *sb)
static struct file_system_type sysfs_fs_type = {
.name = "sysfs",
.get_sb = sysfs_get_sb,
.mount = sysfs_mount,
.kill_sb = sysfs_kill_sb,
};
@ -189,11 +183,11 @@ int __init sysfs_init(void)
err = register_filesystem(&sysfs_fs_type);
if (!err) {
sysfs_mount = kern_mount(&sysfs_fs_type);
if (IS_ERR(sysfs_mount)) {
sysfs_mnt = kern_mount(&sysfs_fs_type);
if (IS_ERR(sysfs_mnt)) {
printk(KERN_ERR "sysfs: could not mount!\n");
err = PTR_ERR(sysfs_mount);
sysfs_mount = NULL;
err = PTR_ERR(sysfs_mnt);
sysfs_mnt = NULL;
unregister_filesystem(&sysfs_fs_type);
goto out_err;
}