152 lines
3.0 KiB
C
152 lines
3.0 KiB
C
/*
|
|
* linux/fs/hfs/attr.c
|
|
*
|
|
* (C) 2003 Ardis Technologies <roman@ardistech.com>
|
|
*
|
|
* Export hfs data via xattr
|
|
*/
|
|
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/xattr.h>
|
|
|
|
#include "hfs_fs.h"
|
|
#include "btree.h"
|
|
|
|
enum hfs_xattr_type {
|
|
HFS_TYPE,
|
|
HFS_CREATOR,
|
|
};
|
|
|
|
static int __hfs_setxattr(struct inode *inode, enum hfs_xattr_type type,
|
|
const void *value, size_t size, int flags)
|
|
{
|
|
struct hfs_find_data fd;
|
|
hfs_cat_rec rec;
|
|
struct hfs_cat_file *file;
|
|
int res;
|
|
|
|
if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
|
|
return -EOPNOTSUPP;
|
|
|
|
res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
|
|
if (res)
|
|
return res;
|
|
fd.search_key->cat = HFS_I(inode)->cat_key;
|
|
res = hfs_brec_find(&fd);
|
|
if (res)
|
|
goto out;
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
file = &rec.file;
|
|
|
|
switch (type) {
|
|
case HFS_TYPE:
|
|
if (size == 4)
|
|
memcpy(&file->UsrWds.fdType, value, 4);
|
|
else
|
|
res = -ERANGE;
|
|
break;
|
|
|
|
case HFS_CREATOR:
|
|
if (size == 4)
|
|
memcpy(&file->UsrWds.fdCreator, value, 4);
|
|
else
|
|
res = -ERANGE;
|
|
break;
|
|
}
|
|
|
|
if (!res)
|
|
hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
out:
|
|
hfs_find_exit(&fd);
|
|
return res;
|
|
}
|
|
|
|
static ssize_t __hfs_getxattr(struct inode *inode, enum hfs_xattr_type type,
|
|
void *value, size_t size)
|
|
{
|
|
struct hfs_find_data fd;
|
|
hfs_cat_rec rec;
|
|
struct hfs_cat_file *file;
|
|
ssize_t res = 0;
|
|
|
|
if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (size) {
|
|
res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd);
|
|
if (res)
|
|
return res;
|
|
fd.search_key->cat = HFS_I(inode)->cat_key;
|
|
res = hfs_brec_find(&fd);
|
|
if (res)
|
|
goto out;
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
}
|
|
file = &rec.file;
|
|
|
|
switch (type) {
|
|
case HFS_TYPE:
|
|
if (size >= 4) {
|
|
memcpy(value, &file->UsrWds.fdType, 4);
|
|
res = 4;
|
|
} else
|
|
res = size ? -ERANGE : 4;
|
|
break;
|
|
|
|
case HFS_CREATOR:
|
|
if (size >= 4) {
|
|
memcpy(value, &file->UsrWds.fdCreator, 4);
|
|
res = 4;
|
|
} else
|
|
res = size ? -ERANGE : 4;
|
|
break;
|
|
}
|
|
|
|
out:
|
|
if (size)
|
|
hfs_find_exit(&fd);
|
|
return res;
|
|
}
|
|
|
|
static int hfs_xattr_get(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, void *value, size_t size)
|
|
{
|
|
return __hfs_getxattr(inode, handler->flags, value, size);
|
|
}
|
|
|
|
static int hfs_xattr_set(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, const void *value, size_t size,
|
|
int flags)
|
|
{
|
|
if (!value)
|
|
return -EOPNOTSUPP;
|
|
|
|
return __hfs_setxattr(inode, handler->flags, value, size, flags);
|
|
}
|
|
|
|
static const struct xattr_handler hfs_creator_handler = {
|
|
.name = "hfs.creator",
|
|
.flags = HFS_CREATOR,
|
|
.get = hfs_xattr_get,
|
|
.set = hfs_xattr_set,
|
|
};
|
|
|
|
static const struct xattr_handler hfs_type_handler = {
|
|
.name = "hfs.type",
|
|
.flags = HFS_TYPE,
|
|
.get = hfs_xattr_get,
|
|
.set = hfs_xattr_set,
|
|
};
|
|
|
|
const struct xattr_handler *hfs_xattr_handlers[] = {
|
|
&hfs_creator_handler,
|
|
&hfs_type_handler,
|
|
NULL
|
|
};
|