static int ecryptfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
int rc;
struct dentry *lower_dentry;
struct dentry *lower_dir_dentry;
lower_dentry = ecryptfs_dentry_to_lower(dentry);
lower_dir_dentry = lock_parent(lower_dentry);
#ifdef CONFIG_SDP
if(!strncmp(lower_dir_dentry->d_sb->s_type->name, "sdcardfs", 8)) {
struct sdcardfs_dentry_info *dinfo = SDCARDFS_D(lower_dir_dentry);
int len = strlen(dentry->d_name.name);
int i, numeric = 1;
dinfo->under_knox = 1;
dinfo->userid = -1;
if(IS_UNDER_ROOT(dentry)) {
for(i=0 ; i < len ; i++)
if(!isdigit(dentry->d_name.name[i])) { numeric = 0; break; }
if(numeric) {
dinfo->userid = simple_strtoul(dentry->d_name.name, NULL, 10);
}
}
}
#endif
rc = vfs_mkdir(lower_dir_dentry->d_inode, lower_dentry, mode);
if (rc || !lower_dentry->d_inode)
goto out;
rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb);
if (rc)
goto out;
fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
fsstack_copy_inode_size(dir, lower_dir_dentry->d_inode);
set_nlink(dir, lower_dir_dentry->d_inode->i_nlink);
out:
#ifdef CONFIG_SDP
if(!strncmp(lower_dir_dentry->d_sb->s_type->name, "sdcardfs", 8)) {
struct sdcardfs_dentry_info *dinfo = SDCARDFS_D(lower_dir_dentry);
dinfo->under_knox = 0;
dinfo->userid = -1;
}
#endif
unlock_dir(lower_dir_dentry);
if (!dentry->d_inode)
d_drop(dentry);
return rc;
}
/* allocate new dentry private data */
int new_dentry_private_data(struct dentry *dentry)
{
struct sdcardfs_dentry_info *info = SDCARDFS_D(dentry);
/* use zalloc to init dentry_info.lower_path */
info = kmem_cache_zalloc(sdcardfs_dentry_cachep, GFP_ATOMIC);
if (!info)
return -ENOMEM;
spin_lock_init(&info->lock);
dentry->d_fsdata = info;
return 0;
}
int is_obbpath_invalid(struct dentry *dent)
{
int ret = 0;
struct sdcardfs_dentry_info *di = SDCARDFS_D(dent);
struct sdcardfs_sb_info *sbi = SDCARDFS_SB(dent->d_sb);
char *path_buf, *obbpath_s;
/* check the base obbpath has been changed.
* this routine can check an uninitialized obb dentry as well.
* regarding the uninitialized obb, refer to the sdcardfs_mkdir() */
spin_lock(&di->lock);
if(di->orig_path.dentry) {
if(!di->lower_path.dentry) {
ret = 1;
} else {
path_get(&di->lower_path);
//lower_parent = lock_parent(lower_path->dentry);
path_buf = kmalloc(PATH_MAX, GFP_ATOMIC);
if(!path_buf) {
ret = 1;
printk(KERN_ERR "sdcardfs: "
"fail to allocate path_buf in %s.\n", __func__);
} else {
obbpath_s = d_path(&di->lower_path, path_buf, PATH_MAX);
if (d_unhashed(di->lower_path.dentry) ||
strcasecmp(sbi->obbpath_s, obbpath_s)) {
ret = 1;
}
kfree(path_buf);
}
//unlock_dir(lower_parent);
path_put(&di->lower_path);
}
}
spin_unlock(&di->lock);
return ret;
}
/**
* ecryptfs_lookup
* @ecryptfs_dir_inode: The eCryptfs directory inode
* @ecryptfs_dentry: The eCryptfs dentry that we are looking up
* @ecryptfs_nd: nameidata; may be NULL
*
* Find a file on disk. If the file does not exist, then we'll add it to the
* dentry cache and continue on to read it from the disk.
*/
static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
struct dentry *ecryptfs_dentry,
unsigned int flags)
{
char *encrypted_and_encoded_name = NULL;
size_t encrypted_and_encoded_name_size;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat = NULL;
struct dentry *lower_dir_dentry, *lower_dentry;
int rc = 0;
lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name,
lower_dir_dentry,
ecryptfs_dentry->d_name.len);
mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
if (IS_ERR(lower_dentry)) {
rc = PTR_ERR(lower_dentry);
ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
"[%d] on lower_dentry = [%s]\n", __func__, rc,
ecryptfs_dentry->d_name.name);
goto out;
}
if (lower_dentry->d_inode)
goto interpose;
mount_crypt_stat = &ecryptfs_superblock_to_private(
ecryptfs_dentry->d_sb)->mount_crypt_stat;
if (!(mount_crypt_stat
&& (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)))
goto interpose;
dput(lower_dentry);
rc = ecryptfs_encrypt_and_encode_filename(
&encrypted_and_encoded_name, &encrypted_and_encoded_name_size,
NULL, mount_crypt_stat, ecryptfs_dentry->d_name.name,
ecryptfs_dentry->d_name.len);
if (rc) {
printk(KERN_ERR "%s: Error attempting to encrypt and encode "
"filename; rc = [%d]\n", __func__, rc);
goto out;
}
mutex_lock(&lower_dir_dentry->d_inode->i_mutex);
#ifdef CONFIG_SDP
if(!strncmp(lower_dir_dentry->d_sb->s_type->name, "sdcardfs", 8)) {
struct sdcardfs_dentry_info *dinfo = SDCARDFS_D(lower_dir_dentry);
int len = strlen(ecryptfs_dentry->d_name.name);
int i, numeric = 1;
dinfo->under_knox = 1;
dinfo->userid = -1;
if(IS_UNDER_ROOT(ecryptfs_dentry)) {
for(i=0 ; i < len ; i++)
if(!isdigit(ecryptfs_dentry->d_name.name[i])) { numeric = 0; break; }
if(numeric) {
dinfo->userid = simple_strtoul(ecryptfs_dentry->d_name.name, NULL, 10);
}
}
}
#endif
lower_dentry = lookup_one_len(encrypted_and_encoded_name,
lower_dir_dentry,
encrypted_and_encoded_name_size);
#ifdef CONFIG_SDP
if(!strncmp(lower_dir_dentry->d_sb->s_type->name, "sdcardfs", 8)) {
struct sdcardfs_dentry_info *dinfo = SDCARDFS_D(lower_dir_dentry);
dinfo->under_knox = 0;
dinfo->userid = -1;
}
#endif
mutex_unlock(&lower_dir_dentry->d_inode->i_mutex);
if (IS_ERR(lower_dentry)) {
rc = PTR_ERR(lower_dentry);
ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
"[%d] on lower_dentry = [%s]\n", __func__, rc,
encrypted_and_encoded_name);
goto out;
}
interpose:
rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry,
ecryptfs_dir_inode);
out:
kfree(encrypted_and_encoded_name);
return ERR_PTR(rc);
}
