89 lines
2 KiB
C
89 lines
2 KiB
C
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/dcache.h>
|
|
#include "sdcardfs.h"
|
|
|
|
static struct dentry *
|
|
sdcardfs_dentry_to_lower(struct dentry *dentry)
|
|
{
|
|
struct dentry* ret;
|
|
|
|
ret = ((struct sdcardfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
sdcardfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags)
|
|
{
|
|
int rc = 0;
|
|
struct dentry *lower_dentry;
|
|
|
|
lower_dentry = sdcardfs_dentry_to_lower(dentry);
|
|
if (!lower_dentry->d_inode->i_op->setxattr) {
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
rc = vfs_setxattr(lower_dentry, name, value, size, flags);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t
|
|
sdcardfs_getxattr_lower(struct dentry *lower_dentry, const char *name, void *value, size_t size)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!lower_dentry->d_inode->i_op->getxattr) {
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
rc = lower_dentry->d_inode->i_op->getxattr(lower_dentry, name, value,
|
|
size);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
ssize_t
|
|
sdcardfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size)
|
|
{
|
|
ssize_t ret;
|
|
ret = sdcardfs_getxattr_lower(sdcardfs_dentry_to_lower(dentry), name,
|
|
value, size);
|
|
return ret;
|
|
}
|
|
|
|
ssize_t
|
|
sdcardfs_listxattr(struct dentry *dentry, char *list, size_t size)
|
|
{
|
|
int rc = 0;
|
|
struct dentry *lower_dentry;
|
|
|
|
lower_dentry = sdcardfs_dentry_to_lower(dentry);
|
|
if (!lower_dentry->d_inode->i_op->listxattr) {
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
rc = lower_dentry->d_inode->i_op->listxattr(lower_dentry, list, size);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
sdcardfs_removexattr(struct dentry *dentry, const char *name)
|
|
{
|
|
int rc = 0;
|
|
struct dentry *lower_dentry;
|
|
|
|
lower_dentry = sdcardfs_dentry_to_lower(dentry);
|
|
if (!lower_dentry->d_inode->i_op->removexattr) {
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
mutex_lock(&lower_dentry->d_inode->i_mutex);
|
|
rc = lower_dentry->d_inode->i_op->removexattr(lower_dentry, name);
|
|
mutex_unlock(&lower_dentry->d_inode->i_mutex);
|
|
out:
|
|
return rc;
|
|
}
|