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