/**
* ecryptfs_readdir
* @file: The eCryptfs directory file
* @dirent: Directory entry handle
* @filldir: The filldir callback function
*/
static int ecryptfs_readdir(struct file *file, void *dirent, filldir_t filldir)
{
int rc;
struct file *lower_file;
struct inode *inode;
struct ecryptfs_getdents_callback buf;
lower_file = ecryptfs_file_to_lower(file);
lower_file->f_pos = file->f_pos;
inode = file_inode(file);
memset(&buf, 0, sizeof(buf));
buf.dirent = dirent;
buf.dentry = file->f_path.dentry;
buf.filldir = filldir;
buf.filldir_called = 0;
buf.entries_written = 0;
buf.ctx.actor = ecryptfs_filldir;
rc = iterate_dir(lower_file, &buf.ctx);
file->f_pos = lower_file->f_pos;
if (rc < 0)
goto out;
if (buf.filldir_called && !buf.entries_written)
goto out;
if (rc >= 0)
fsstack_copy_attr_atime(inode,
file_inode(lower_file));
out:
return rc;
}
int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
{
struct fd arg;
struct hpux_dirent __user * lastdirent;
struct getdents_callback buf;
int error;
arg = fdget(fd);
if (!arg.file)
return -EBADF;
buf.current_dir = dirent;
buf.previous = NULL;
buf.count = count;
buf.error = 0;
buf.ctx.actor = filldir;
error = iterate_dir(arg.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
if (put_user(buf.ctx.pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
fdput(arg);
return error;
}
void dir_spec::iterate_dir(const fs::path & dir) {
LDBG_ << "Parsing dir " << fs::system_complete(dir).string();
if ( !fs::exists( dir) ) {
LERR_ << "Dir " << dir.string() << " does not exist anymore!";
return ;
}
for ( fs::directory_iterator b(dir), e; b != e; ++b) {
if ( fs::is_directory(*b))
iterate_dir(*b);
else {
// file
bool matches_ext = false;
for ( extensions::array::const_iterator b_ext = m_ext.vals.begin(), e_ext = m_ext.vals.end(); b_ext != e_ext; ++b_ext)
if ( fs::extension(*b) == "." + *b_ext) {
matches_ext = true;
break;
}
if ( matches_ext) {
m_stats += parse_file(*b);
++m_file_count;
}
else
LDBG_ << "Ignoring file " << b->string();
}
}
}
int unit_file_process_dir(
Set *unit_path_cache,
const char *unit_path,
const char *name,
const char *suffix,
UnitDependency dependency,
dependency_consumer_t consumer,
void *arg,
char ***strv) {
_cleanup_free_ char *path = NULL;
int r;
assert(unit_path);
assert(name);
assert(suffix);
path = strjoin(unit_path, "/", name, suffix);
if (!path)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, path))
(void) iterate_dir(path, dependency, consumer, arg, strv);
if (unit_name_is_valid(name, UNIT_NAME_INSTANCE)) {
_cleanup_free_ char *template = NULL, *p = NULL;
void iterate_dir(FS* fs, uint32_t dir, void* pdata, iterate_dir_callback cb)
{
if (!fs)
throw std::invalid_argument("iterate_dir invalid arg: fs");
open_inode inode(fs_open_inode(fs, dir));
iterate_dir(inode.get(), pdata, cb);
}
int vfsub_iterate_dir(struct file *file, struct dir_context *ctx)
{
int err;
AuDbg("%pD, ctx{%pf, %llu}\n", file, ctx->actor, ctx->pos);
lockdep_off();
err = iterate_dir(file, ctx);
lockdep_on();
if (err >= 0)
vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
return err;
}
void dir_spec::iterate() {
iterate_dir( m_path);
LAPP_ << "\n\nAll Files :\n"
<< "\n No of Files : " << m_file_count
<< "\n"
<< "\n Code : " << m_stats.code
<< "\n Comments : " << m_stats.commented
<< "\n Empty : " << m_stats.empty
<< "\n Total : " << m_stats.total
<< "\n"
<< "\n Avg C/L : " << (int)((double)m_stats.non_space_chars / (double)(m_stats.code + m_stats.commented))
;
}
static int sdcardfs_readdir(struct file *file, struct dir_context *ctx)
{
int err = 0;
struct file *lower_file = NULL;
struct dentry *dentry = file->f_path.dentry;
lower_file = sdcardfs_lower_file(file);
lower_file->f_pos = file->f_pos;
err = iterate_dir(lower_file, ctx);
file->f_pos = lower_file->f_pos;
if (err >= 0) /* copy the atime */
fsstack_copy_attr_atime(dentry->d_inode,
lower_file->f_path.dentry->d_inode);
return err;
}
SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
struct old_linux_dirent __user *, dirent, unsigned int, count)
{
int error;
struct fd f = fdget(fd);
struct readdir_callback buf;
if (!f.file)
return -EBADF;
buf.ctx.actor = fillonedir;
buf.result = 0;
buf.dirent = dirent;
error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
fdput(f);
return error;
}
/**
* ecryptfs_readdir
* @file: The eCryptfs directory file
* @ctx: The actor to feed the entries to
*/
static int ecryptfs_readdir(struct file *file, struct dir_context *ctx)
{
int rc;
struct file *lower_file;
struct inode *inode = file_inode(file);
struct ecryptfs_getdents_callback buf = {
.ctx.actor = ecryptfs_filldir,
.caller = ctx,
.sb = inode->i_sb,
};
lower_file = ecryptfs_file_to_lower(file);
lower_file->f_pos = ctx->pos;
rc = iterate_dir(lower_file, &buf.ctx);
ctx->pos = buf.ctx.pos;
if (rc < 0)
goto out;
if (buf.filldir_called && !buf.entries_written)
goto out;
if (rc >= 0)
fsstack_copy_attr_atime(inode,
file_inode(lower_file));
out:
return rc;
}
struct kmem_cache *ecryptfs_file_info_cache;
static int read_or_initialize_metadata(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
struct ecryptfs_crypt_stat *crypt_stat;
int rc;
crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
mount_crypt_stat = &ecryptfs_superblock_to_private(
inode->i_sb)->mount_crypt_stat;
mutex_lock(&crypt_stat->cs_mutex);
if (crypt_stat->flags & ECRYPTFS_POLICY_APPLIED &&
crypt_stat->flags & ECRYPTFS_KEY_VALID) {
rc = 0;
goto out;
}
rc = ecryptfs_read_metadata(dentry);
if (!rc)
goto out;
if (mount_crypt_stat->flags & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED) {
crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED
| ECRYPTFS_ENCRYPTED);
rc = 0;
goto out;
}
if (!(mount_crypt_stat->flags & ECRYPTFS_XATTR_METADATA_ENABLED) &&
!i_size_read(ecryptfs_inode_to_lower(inode))) {
rc = ecryptfs_initialize_file(dentry, inode);
if (!rc)
goto out;
}
rc = -EIO;
out:
mutex_unlock(&crypt_stat->cs_mutex);
return rc;
}
/**
* ecryptfs_open
* @inode: inode speciying file to open
* @file: Structure to return filled in
*
* Opens the file specified by inode.
*
* Returns zero on success; non-zero otherwise
*/
static int ecryptfs_open(struct inode *inode, struct file *file)
{
int rc = 0;
struct ecryptfs_crypt_stat *crypt_stat = NULL;
struct dentry *ecryptfs_dentry = file->f_path.dentry;
/* Private value of ecryptfs_dentry allocated in
* ecryptfs_lookup() */
struct ecryptfs_file_info *file_info;
/* Released in ecryptfs_release or end of function if failure */
file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL);
ecryptfs_set_file_private(file, file_info);
if (!file_info) {
ecryptfs_printk(KERN_ERR,
"Error attempting to allocate memory\n");
rc = -ENOMEM;
goto out;
}
crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
mutex_lock(&crypt_stat->cs_mutex);
if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) {
ecryptfs_printk(KERN_DEBUG, "Setting flags for stat...\n");
/* Policy code enabled in future release */
crypt_stat->flags |= (ECRYPTFS_POLICY_APPLIED
| ECRYPTFS_ENCRYPTED);
}
mutex_unlock(&crypt_stat->cs_mutex);
rc = ecryptfs_get_lower_file(ecryptfs_dentry, inode);
if (rc) {
printk(KERN_ERR "%s: Error attempting to initialize "
"the lower file for the dentry with name "
"[%s]; rc = [%d]\n", __func__,
ecryptfs_dentry->d_name.name, rc);
goto out_free;
}
if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE)
== O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) {
rc = -EPERM;
printk(KERN_WARNING "%s: Lower file is RO; eCryptfs "
"file must hence be opened RO\n", __func__);
goto out_put;
}
ecryptfs_set_file_lower(
file, ecryptfs_inode_to_private(inode)->lower_file);
if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
mutex_lock(&crypt_stat->cs_mutex);
crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
mutex_unlock(&crypt_stat->cs_mutex);
rc = 0;
goto out;
}
rc = read_or_initialize_metadata(ecryptfs_dentry);
if (rc)
goto out_put;
ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = "
"[0x%.16lx] size: [0x%.16llx]\n", inode, inode->i_ino,
(unsigned long long)i_size_read(inode));
goto out;
out_put:
ecryptfs_put_lower_file(inode);
out_free:
kmem_cache_free(ecryptfs_file_info_cache,
ecryptfs_file_to_private(file));
out:
return rc;
}
SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
struct old_linux_dirent __user *, dirent, unsigned int, count)
{
int error;
struct fd f = fdget(fd);
struct readdir_callback buf = {
.ctx.actor = fillonedir,
.dirent = dirent
};
if (!f.file)
return -EBADF;
error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
fdput(f);
return error;
}
#endif /* __ARCH_WANT_OLD_READDIR */
/*
* New, all-improved, singing, dancing, iBCS2-compliant getdents()
* interface.
*/
struct linux_dirent {
unsigned long d_ino;
unsigned long d_off;
unsigned short d_reclen;
char d_name[1];
};
struct getdents_callback {
struct dir_context ctx;
struct linux_dirent __user * current_dir;
struct linux_dirent __user * previous;
int count;
int error;
};
static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
u64 ino, unsigned int d_type)
{
struct linux_dirent __user * dirent;
struct getdents_callback * buf = (struct getdents_callback *) __buf;
unsigned long d_ino;
int reclen = ALIGN(offsetof(struct linux_dirent, d_name) + namlen + 2,
sizeof(long));
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
d_ino = ino;
if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
buf->error = -EOVERFLOW;
return -EOVERFLOW;
}
dirent = buf->previous;
if (dirent) {
if (__put_user(offset, &dirent->d_off))
goto efault;
}
dirent = buf->current_dir;
if (__put_user(d_ino, &dirent->d_ino))
goto efault;
if (__put_user(reclen, &dirent->d_reclen))
goto efault;
if (copy_to_user(dirent->d_name, name, namlen))
goto efault;
if (__put_user(0, dirent->d_name + namlen))
goto efault;
if (__put_user(d_type, (char __user *) dirent + reclen - 1))
goto efault;
buf->previous = dirent;
dirent = (void __user *)dirent + reclen;
buf->current_dir = dirent;
buf->count -= reclen;
return 0;
efault:
buf->error = -EFAULT;
return -EFAULT;
}
SYSCALL_DEFINE3(getdents, unsigned int, fd,
struct linux_dirent __user *, dirent, unsigned int, count)
{
struct fd f;
struct linux_dirent __user * lastdirent;
struct getdents_callback buf = {
.ctx.actor = filldir,
.count = count,
.current_dir = dirent
};
int error;
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
f = fdget(fd);
if (!f.file)
return -EBADF;
error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
if (put_user(buf.ctx.pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
fdput(f);
return error;
}
struct getdents_callback64 {
struct dir_context ctx;
struct linux_dirent64 __user * current_dir;
struct linux_dirent64 __user * previous;
int count;
int error;
};
static int filldir64(void * __buf, const char * name, int namlen, loff_t offset,
u64 ino, unsigned int d_type)
{
struct linux_dirent64 __user *dirent;
struct getdents_callback64 * buf = (struct getdents_callback64 *) __buf;
int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
sizeof(u64));
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
dirent = buf->previous;
if (dirent) {
if (__put_user(offset, &dirent->d_off))
goto efault;
}
dirent = buf->current_dir;
if (__put_user(ino, &dirent->d_ino))
goto efault;
if (__put_user(0, &dirent->d_off))
goto efault;
if (__put_user(reclen, &dirent->d_reclen))
goto efault;
if (__put_user(d_type, &dirent->d_type))
goto efault;
if (copy_to_user(dirent->d_name, name, namlen))
goto efault;
if (__put_user(0, dirent->d_name + namlen))
goto efault;
buf->previous = dirent;
dirent = (void __user *)dirent + reclen;
buf->current_dir = dirent;
buf->count -= reclen;
return 0;
efault:
buf->error = -EFAULT;
return -EFAULT;
}
SYSCALL_DEFINE3(getdents64, unsigned int, fd,
struct linux_dirent64 __user *, dirent, unsigned int, count)
{
struct fd f;
struct linux_dirent64 __user * lastdirent;
struct getdents_callback64 buf = {
.ctx.actor = filldir64,
.count = count,
.current_dir = dirent
};
int error;
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
f = fdget(fd);
if (!f.file)
return -EBADF;
error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
typeof(lastdirent->d_off) d_off = buf.ctx.pos;
if (__put_user(d_off, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
fdput(f);
return error;
}
/**
* ecryptfs_readdir
* @file: The eCryptfs directory file
* @ctx: The actor to feed the entries to
*/
static int ecryptfs_readdir(struct file *file, struct dir_context *ctx)
{
int rc;
struct file *lower_file;
struct inode *inode = file_inode(file);
struct ecryptfs_getdents_callback buf = {
.ctx.actor = ecryptfs_filldir,
.caller = ctx,
.sb = inode->i_sb,
};
lower_file = ecryptfs_file_to_lower(file);
lower_file->f_pos = ctx->pos;
rc = iterate_dir(lower_file, &buf.ctx);
ctx->pos = buf.ctx.pos;
if (rc < 0)
goto out;
if (buf.filldir_called && !buf.entries_written)
goto out;
if (rc >= 0)
fsstack_copy_attr_atime(inode,
file_inode(lower_file));
out:
return rc;
}
struct kmem_cache *ecryptfs_file_info_cache;
static int read_or_initialize_metadata(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
struct ecryptfs_crypt_stat *crypt_stat;
int rc;
crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
mount_crypt_stat = &ecryptfs_superblock_to_private(
inode->i_sb)->mount_crypt_stat;
#ifdef CONFIG_WTL_ENCRYPTION_FILTER
if (crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED
&& crypt_stat->flags & ECRYPTFS_POLICY_APPLIED
&& crypt_stat->flags & ECRYPTFS_ENCRYPTED
&& !(crypt_stat->flags & ECRYPTFS_KEY_VALID)
&& !(crypt_stat->flags & ECRYPTFS_KEY_SET)
&& crypt_stat->flags & ECRYPTFS_I_SIZE_INITIALIZED) {
crypt_stat->flags |= ECRYPTFS_ENCRYPTED_OTHER_DEVICE;
}
mutex_lock(&crypt_stat->cs_mutex);
if ((mount_crypt_stat->flags & ECRYPTFS_ENABLE_NEW_PASSTHROUGH)
&& (crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
if (ecryptfs_read_metadata(dentry)) {
crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED
| ECRYPTFS_ENCRYPTED);
rc = 0;
goto out;
}
} else if ((mount_crypt_stat->flags & ECRYPTFS_ENABLE_FILTERING)
&& (crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
struct dentry *fp_dentry =
ecryptfs_inode_to_private(inode)->lower_file->f_dentry;
char filename[NAME_MAX+1] = {0};
if (fp_dentry->d_name.len <= NAME_MAX)
memcpy(filename, fp_dentry->d_name.name,
fp_dentry->d_name.len + 1);
if (is_file_name_match(mount_crypt_stat, fp_dentry)
|| is_file_ext_match(mount_crypt_stat, filename)) {
if (ecryptfs_read_metadata(dentry))
crypt_stat->flags &=
~(ECRYPTFS_I_SIZE_INITIALIZED
| ECRYPTFS_ENCRYPTED);
rc = 0;
goto out;
}
}
mutex_unlock(&crypt_stat->cs_mutex);
#endif
mutex_lock(&crypt_stat->cs_mutex);
if (crypt_stat->flags & ECRYPTFS_POLICY_APPLIED &&
crypt_stat->flags & ECRYPTFS_KEY_VALID) {
rc = 0;
goto out;
}
rc = ecryptfs_read_metadata(dentry);
if (!rc)
goto out;
#ifdef CONFIG_SDP
/*
* no passthrough/xattr for sensitive files
*/
if ((rc) && crypt_stat->flags & ECRYPTFS_DEK_IS_SENSITIVE)
goto out;
#endif
if (mount_crypt_stat->flags & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED) {
crypt_stat->flags &= ~(ECRYPTFS_I_SIZE_INITIALIZED
| ECRYPTFS_ENCRYPTED);
rc = 0;
goto out;
}
if (!(mount_crypt_stat->flags & ECRYPTFS_XATTR_METADATA_ENABLED) &&
!i_size_read(ecryptfs_inode_to_lower(inode))) {
rc = ecryptfs_initialize_file(dentry, inode);
if (!rc)
goto out;
}
rc = -EIO;
out:
mutex_unlock(&crypt_stat->cs_mutex);
#ifdef CONFIG_SDP
if(!rc)
{
/*
* SDP v2.0 : sensitive directory (SDP vault)
* Files under sensitive directory automatically becomes sensitive
*/
struct dentry *p = dentry->d_parent;
struct inode *parent_inode = p->d_inode;
struct ecryptfs_crypt_stat *parent_crypt_stat =
&ecryptfs_inode_to_private(parent_inode)->crypt_stat;
if (!(crypt_stat->flags & ECRYPTFS_DEK_IS_SENSITIVE) &&
((S_ISDIR(parent_inode->i_mode)) &&
(parent_crypt_stat->flags & ECRYPTFS_DEK_IS_SENSITIVE))) {
rc = ecryptfs_sdp_set_sensitive(parent_crypt_stat->engine_id, dentry);
}
}
#endif
return rc;
}
#if defined(CONFIG_MMC_DW_FMP_ECRYPT_FS) || defined(CONFIG_UFS_FMP_ECRYPT_FS)
static void ecryptfs_set_rapages(struct file *file, unsigned int flag)
{
if (!flag)
file->f_ra.ra_pages = 0;
else
file->f_ra.ra_pages = (unsigned int)file->f_mapping->backing_dev_info->ra_pages;
}
static int ecryptfs_set_fmpinfo(struct file *file, struct inode *inode, unsigned int set_flag)
{
struct address_space *mapping = file->f_mapping;
if (set_flag) {
struct ecryptfs_crypt_stat *crypt_stat =
&ecryptfs_inode_to_private(inode)->crypt_stat;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
&ecryptfs_superblock_to_private(inode->i_sb)->mount_crypt_stat;
if (strncmp(crypt_stat->cipher, "aesxts", sizeof("aesxts"))
&& strncmp(crypt_stat->cipher, "aes", sizeof("aes"))) {
if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
mapping->plain_text = 1;
return 0;
} else {
ecryptfs_printk(KERN_ERR,
"%s: Error invalid file encryption algorithm, inode %lu, filename %s alg %s\n"
, __func__, inode->i_ino, file->f_dentry->d_name.name, crypt_stat->cipher);
return -EINVAL;
}
}
mapping->iv = crypt_stat->root_iv;
mapping->key = crypt_stat->key;
mapping->sensitive_data_index = crypt_stat->metadata_size/4096;
if (mount_crypt_stat->cipher_code == RFC2440_CIPHER_AES_XTS_256) {
mapping->key_length = crypt_stat->key_size * 2;
mapping->alg = "aesxts";
} else {
mapping->key_length = crypt_stat->key_size;
mapping->alg = crypt_stat->cipher;
}
mapping->hash_tfm = crypt_stat->hash_tfm;
#ifdef CONFIG_CRYPTO_FIPS
mapping->cc_enable =
(mount_crypt_stat->flags & ECRYPTFS_ENABLE_CC)?1:0;
#endif
} else {
mapping->iv = NULL;
mapping->key = NULL;
mapping->key_length = 0;
mapping->sensitive_data_index = 0;
mapping->alg = NULL;
mapping->hash_tfm = NULL;
#ifdef CONFIG_CRYPTO_FIPS
mapping->cc_enable = 0;
#endif
mapping->plain_text = 0;
}
return 0;
}
void ecryptfs_propagate_rapages(struct file *file, unsigned int flag)
{
struct file *f = file;
do {
if (!f)
return;
ecryptfs_set_rapages(f, flag);
} while(f->f_op->get_lower_file && (f = f->f_op->get_lower_file(f)));
}
int ecryptfs_propagate_fmpinfo(struct inode *inode, unsigned int flag)
{
struct file *f = ecryptfs_inode_to_private(inode)->lower_file;
do {
if (!f)
return 0;
if (ecryptfs_set_fmpinfo(f, inode, flag))
return -EINVAL;
} while(f->f_op->get_lower_file && (f = f->f_op->get_lower_file(f)));
return 0;
}
#endif
/**
* ecryptfs_open
* @inode: inode speciying file to open
* @file: Structure to return filled in
*
* Opens the file specified by inode.
*
* Returns zero on success; non-zero otherwise
*/
static int ecryptfs_open(struct inode *inode, struct file *file)
{
int rc = 0;
struct ecryptfs_crypt_stat *crypt_stat = NULL;
struct dentry *ecryptfs_dentry = file->f_path.dentry;
/* Private value of ecryptfs_dentry allocated in
* ecryptfs_lookup() */
struct ecryptfs_file_info *file_info;
#ifdef CONFIG_DLP
sdp_fs_command_t *cmd = NULL;
ssize_t dlp_len = 0;
struct knox_dlp_data dlp_data;
struct timespec ts;
#endif
#if defined(CONFIG_MMC_DW_FMP_ECRYPT_FS) || defined(CONFIG_UFS_FMP_ECRYPT_FS) || defined(CONFIG_SDP)
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
mount_crypt_stat = &ecryptfs_superblock_to_private(
inode->i_sb)->mount_crypt_stat;
#endif
/* Released in ecryptfs_release or end of function if failure */
file_info = kmem_cache_zalloc(ecryptfs_file_info_cache, GFP_KERNEL);
ecryptfs_set_file_private(file, file_info);
if (!file_info) {
ecryptfs_printk(KERN_ERR,
"Error attempting to allocate memory\n");
rc = -ENOMEM;
goto out;
}
crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
mutex_lock(&crypt_stat->cs_mutex);
if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) {
ecryptfs_printk(KERN_DEBUG, "Setting flags for stat...\n");
/* Policy code enabled in future release */
crypt_stat->flags |= (ECRYPTFS_POLICY_APPLIED
| ECRYPTFS_ENCRYPTED);
}
mutex_unlock(&crypt_stat->cs_mutex);
rc = ecryptfs_get_lower_file(ecryptfs_dentry, inode);
if (rc) {
printk(KERN_ERR "%s: Error attempting to initialize "
"the lower file for the dentry with name "
"[%pd]; rc = [%d]\n", __func__,
ecryptfs_dentry, rc);
goto out_free;
}
if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE)
== O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) {
rc = -EPERM;
printk(KERN_WARNING "%s: Lower file is RO; eCryptfs "
"file must hence be opened RO\n", __func__);
goto out_put;
}
ecryptfs_set_file_lower(
file, ecryptfs_inode_to_private(inode)->lower_file);
if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
#ifdef CONFIG_SDP
/*
* it's possible to have a sensitive directory. (vault)
*/
if (mount_crypt_stat->flags & ECRYPTFS_MOUNT_SDP_ENABLED)
crypt_stat->flags |= ECRYPTFS_DEK_SDP_ENABLED;
#endif
ecryptfs_printk(KERN_DEBUG, "This is a directory\n");
mutex_lock(&crypt_stat->cs_mutex);
crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
mutex_unlock(&crypt_stat->cs_mutex);
rc = 0;
goto out;
}
rc = read_or_initialize_metadata(ecryptfs_dentry);
if (rc) {
#ifdef CONFIG_SDP
if(file->f_flags & O_SDP){
printk("Failed to initialize metadata, "
"but let it continue cause current call is from SDP API\n");
mutex_lock(&crypt_stat->cs_mutex);
crypt_stat->flags &= ~(ECRYPTFS_KEY_VALID);
mutex_unlock(&crypt_stat->cs_mutex);
rc = 0;
/*
* Letting this continue doesn't mean to allow read/writing. It will anyway fail later.
*
* 1. In this stage, ecryptfs_stat won't have key/iv and encryption ctx.
* 2. ECRYPTFS_KEY_VALID bit is off, next attempt will try reading metadata again.
* 3. Skip DEK conversion. it cannot be done anyway.
*/
goto out;
}
#endif
goto out_put;
}
#if defined(CONFIG_MMC_DW_FMP_ECRYPT_FS) || defined(CONFIG_UFS_FMP_ECRYPT_FS)
if (mount_crypt_stat->flags & ECRYPTFS_USE_FMP)
rc = ecryptfs_propagate_fmpinfo(inode, FMPINFO_SET);
else
rc = ecryptfs_propagate_fmpinfo(inode, FMPINFO_CLEAR);
#endif
if (rc)
goto out_put;
#ifdef CONFIG_SDP
if (crypt_stat->flags & ECRYPTFS_DEK_IS_SENSITIVE) {
#ifdef CONFIG_SDP_KEY_DUMP
if (S_ISREG(ecryptfs_dentry->d_inode->i_mode)) {
if(get_sdp_sysfs_key_dump()) {
printk("FEK[%s] : ", ecryptfs_dentry->d_name.name);
key_dump(crypt_stat->key, 32);
}
}
#endif
/*
* Need to update sensitive mapping on file open
*/
if (S_ISREG(ecryptfs_dentry->d_inode->i_mode)) {
ecryptfs_set_mapping_sensitive(inode, mount_crypt_stat->userid, TO_SENSITIVE);
}
if (ecryptfs_is_sdp_locked(crypt_stat->engine_id)) {
ecryptfs_printk(KERN_INFO, "ecryptfs_open: persona is locked, rc=%d\n", rc);
} else {
int dek_type = crypt_stat->sdp_dek.type;
ecryptfs_printk(KERN_INFO, "ecryptfs_open: persona is unlocked, rc=%d\n", rc);
if(dek_type != DEK_TYPE_AES_ENC) {
ecryptfs_printk(KERN_DEBUG, "converting dek...\n");
rc = ecryptfs_sdp_convert_dek(ecryptfs_dentry);
ecryptfs_printk(KERN_DEBUG, "conversion ready, rc=%d\n", rc);
rc = 0; // TODO: Do we need to return error if conversion fails?
}
}
}
#if ECRYPTFS_DEK_DEBUG
else {
ecryptfs_printk(KERN_INFO, "ecryptfs_open: dek_file_type is protected\n");
}
#endif
#endif
#ifdef CONFIG_DLP
if(crypt_stat->flags & ECRYPTFS_DLP_ENABLED) {
#if DLP_DEBUG
printk("DLP %s: try to open %s with crypt_stat->flags %d\n",
__func__, ecryptfs_dentry->d_name.name, crypt_stat->flags);
#endif
if (dlp_is_locked(mount_crypt_stat->userid)) {
printk("%s: DLP locked\n", __func__);
rc = -EPERM;
goto out_put;
}
if(in_egroup_p(AID_KNOX_DLP) || in_egroup_p(AID_KNOX_DLP_RESTRICTED)) {
dlp_len = ecryptfs_getxattr_lower(
ecryptfs_dentry_to_lower(ecryptfs_dentry),
KNOX_DLP_XATTR_NAME,
&dlp_data, sizeof(dlp_data));
if (dlp_len == sizeof(dlp_data)) {
getnstimeofday(&ts);
#if DLP_DEBUG
printk("DLP %s: current time [%ld/%ld] %s\n",
__func__, (long)ts.tv_sec, (long)dlp_data.expiry_time.tv_sec, ecryptfs_dentry->d_name.name);
#endif
if ((ts.tv_sec > dlp_data.expiry_time.tv_sec) && dlp_isInterestedFile(ecryptfs_dentry->d_name.name)==0) {
/* Command to delete expired file */
cmd = sdp_fs_command_alloc(FSOP_DLP_FILE_REMOVE,
current->tgid, mount_crypt_stat->userid, mount_crypt_stat->partition_id,
inode->i_ino, GFP_KERNEL);
rc = -ENOENT;
goto out_put;
}
} else if (dlp_len == -ENODATA) {
/* DLP flag is set, but no DLP data. Let it continue, xattr will be set later */
printk("DLP %s: normal file [%s]\n",
__func__, ecryptfs_dentry->d_name.name);
} else {
printk("DLP %s: Error, len [%ld], [%s]\n",
__func__, (long)dlp_len, ecryptfs_dentry->d_name.name);
rc = -EFAULT;
goto out_put;
}
#if DLP_DEBUG
printk("DLP %s: DLP file [%s] opened with tgid %d, %d\n" ,
__func__, ecryptfs_dentry->d_name.name, current->tgid, in_egroup_p(AID_KNOX_DLP_RESTRICTED));
#endif
if(in_egroup_p(AID_KNOX_DLP_RESTRICTED)) {
cmd = sdp_fs_command_alloc(FSOP_DLP_FILE_OPENED,
current->tgid, mount_crypt_stat->userid, mount_crypt_stat->partition_id,
inode->i_ino, GFP_KERNEL);
}
} else {
printk("DLP %s: not DLP app [%s]\n", __func__, current->comm);
rc = -EPERM;
goto out_put;
}
}
#endif
ecryptfs_printk(KERN_DEBUG, "inode w/ addr = [0x%p], i_ino = "
"[0x%.16lx] size: [0x%.16llx]\n", inode, inode->i_ino,
(unsigned long long)i_size_read(inode));
goto out;
out_put:
ecryptfs_put_lower_file(inode);
out_free:
kmem_cache_free(ecryptfs_file_info_cache,
ecryptfs_file_to_private(file));
out:
#ifdef CONFIG_DLP
if(cmd) {
sdp_fs_request(cmd, NULL);
sdp_fs_command_free(cmd);
}
#endif
return rc;
}
/* Is a directory logically empty? */
int check_empty(struct dentry *dentry, struct dentry *parent,
struct unionfs_dir_state **namelist)
{
int err = 0;
struct dentry *lower_dentry = NULL;
struct vfsmount *mnt;
struct super_block *sb;
struct file *lower_file;
struct unionfs_rdutil_callback buf = {
.ctx.actor = readdir_util_callback,
};
int bindex, bstart, bend, bopaque;
struct path path;
sb = dentry->d_sb;
BUG_ON(!S_ISDIR(dentry->d_inode->i_mode));
err = unionfs_partial_lookup(dentry, parent);
if (err)
goto out;
bstart = dbstart(dentry);
bend = dbend(dentry);
bopaque = dbopaque(dentry);
if (0 <= bopaque && bopaque < bend)
bend = bopaque;
buf.err = 0;
buf.filldir_called = 0;
buf.mode = RD_CHECK_EMPTY;
buf.ctx.pos = 0; /* XXX: needed?! */
buf.rdstate = alloc_rdstate(dentry->d_inode, bstart);
if (unlikely(!buf.rdstate)) {
err = -ENOMEM;
goto out;
}
/* Process the lower directories with rdutil_callback as a filldir. */
for (bindex = bstart; bindex <= bend; bindex++) {
lower_dentry = unionfs_lower_dentry_idx(dentry, bindex);
if (!lower_dentry)
continue;
if (!lower_dentry->d_inode)
continue;
if (!S_ISDIR(lower_dentry->d_inode->i_mode))
continue;
dget(lower_dentry);
mnt = unionfs_mntget(dentry, bindex);
branchget(sb, bindex);
path.dentry = lower_dentry;
path.mnt = mnt;
lower_file = dentry_open(&path, O_RDONLY, current_cred());
path_put(&path);
if (IS_ERR(lower_file)) {
err = PTR_ERR(lower_file);
branchput(sb, bindex);
goto out;
}
do {
buf.filldir_called = 0;
buf.rdstate->bindex = bindex;
err = iterate_dir(lower_file, &buf.ctx);
if (buf.err)
err = buf.err;
} while ((err >= 0) && buf.filldir_called);
/* fput calls dput for lower_dentry */
fput(lower_file);
branchput(sb, bindex);
if (err < 0)
goto out;
}
out:
if (namelist && !err)
*namelist = buf.rdstate;
else if (buf.rdstate)
free_rdstate(buf.rdstate);
return err;
}
/**
* tierfs_readdir
* @file: The eCryptfs directory file
* @ctx: The actor to feed the entries to
*/
static int tierfs_readdir(struct file *file, struct dir_context *ctx)
{
int rc;
struct file *lower_file;
struct inode *inode = file_inode(file);
struct tierfs_getdents_callback buf = {
.ctx.actor = tierfs_filldir,
.caller = ctx,
.sb = inode->i_sb,
};
TRACE_ENTRY();
lower_file = tierfs_file_to_lower(file);
lower_file->f_pos = ctx->pos;
rc = iterate_dir(lower_file, &buf.ctx);
ctx->pos = buf.ctx.pos;
if (rc < 0)
goto out;
if (buf.filldir_called && !buf.entries_written)
goto out;
if (rc >= 0)
fsstack_copy_attr_atime(inode,
file_inode(lower_file));
out:
TRACE_EXIT();
return rc;
}
struct kmem_cache *tierfs_file_info_cache;
/**
* tierfs_open
* @inode: inode speciying file to open
* @file: Structure to return filled in
*
* Opens the file specified by inode.
*
* Returns zero on success; non-zero otherwise
*/
static int tierfs_open(struct inode *inode, struct file *file)
{
int rc = 0;
struct dentry *tierfs_dentry = file->f_path.dentry;
/* Private value of tierfs_dentry allocated in
* tierfs_lookup() */
struct tierfs_file_info *file_info;
TRACE_ENTRY();
/* Released in tierfs_release or end of function if failure */
file_info = kmem_cache_zalloc(tierfs_file_info_cache, GFP_KERNEL);
tierfs_set_file_private(file, file_info);
if (!file_info) {
tierfs_printk(KERN_ERR,
"Error attempting to allocate memory\n");
rc = -ENOMEM;
goto out;
}
rc = tierfs_get_lower_file(tierfs_dentry, inode);
if (!(tierfs_inode_to_private(inode)->lower_file)) {
printk(KERN_ERR "%s: Error attempting to initialize "
"the lower file for the dentry with name "
"[%s]; rc = [%d]\n", __func__,
tierfs_dentry->d_name.name, rc);
goto out_free;
}
if ((tierfs_inode_to_private(inode)->lower_file->f_flags & O_ACCMODE)
== O_RDONLY && (file->f_flags & O_ACCMODE) != O_RDONLY) {
rc = -EPERM;
printk(KERN_ERR "%s: Lower file is RO; eCryptfs "
"file must hence be opened RO\n", __func__);
goto out_put;
}
tierfs_set_file_lower(
file, tierfs_inode_to_private(inode)->lower_file);
if (S_ISDIR(tierfs_dentry->d_inode->i_mode)) {
rc = 0;
goto out;
}
goto out;
out_put:
tierfs_put_lower_file(inode);
out_free:
kmem_cache_free(tierfs_file_info_cache,
tierfs_file_to_private(file));
out:
TRACE_EXIT();
return rc;
}