summaryrefslogtreecommitdiffstats
path: root/fs/ecryptfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r--fs/ecryptfs/crypto.c9
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h4
-rw-r--r--fs/ecryptfs/inode.c92
-rw-r--r--fs/ecryptfs/kthread.c13
-rw-r--r--fs/ecryptfs/mmap.c3
5 files changed, 59 insertions, 62 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index ebd40f46ed4c..0d8eb3455b34 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1141,12 +1141,13 @@ ecryptfs_write_metadata_to_contents(struct inode *ecryptfs_inode,
static int
ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
+ struct inode *ecryptfs_inode,
char *page_virt, size_t size)
{
int rc;
- rc = ecryptfs_setxattr(ecryptfs_dentry, ECRYPTFS_XATTR_NAME, page_virt,
- size, 0);
+ rc = ecryptfs_setxattr(ecryptfs_dentry, ecryptfs_inode,
+ ECRYPTFS_XATTR_NAME, page_virt, size, 0);
return rc;
}
@@ -1215,8 +1216,8 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
goto out_free;
}
if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
- rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
- size);
+ rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, ecryptfs_inode,
+ virt, size);
else
rc = ecryptfs_write_metadata_to_contents(ecryptfs_inode, virt,
virt_len);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 3ec495db7e82..4ba1547bb9ad 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -609,8 +609,8 @@ ssize_t
ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
const char *name, void *value, size_t size);
int
-ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
- size_t size, int flags);
+ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
+ const void *value, size_t size, int flags);
int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
#ifdef CONFIG_ECRYPT_FS_MESSAGING
int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 9b022e906660..9d153b6a1d72 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -324,9 +324,8 @@ static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode)
/**
* ecryptfs_lookup_interpose - Dentry interposition for a lookup
*/
-static int ecryptfs_lookup_interpose(struct dentry *dentry,
- struct dentry *lower_dentry,
- struct inode *dir_inode)
+static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry,
+ struct dentry *lower_dentry)
{
struct inode *inode, *lower_inode = d_inode(lower_dentry);
struct ecryptfs_dentry_info *dentry_info;
@@ -339,11 +338,12 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry,
"to allocate ecryptfs_dentry_info struct\n",
__func__);
dput(lower_dentry);
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
lower_mnt = mntget(ecryptfs_dentry_to_lower_mnt(dentry->d_parent));
- fsstack_copy_attr_atime(dir_inode, d_inode(lower_dentry->d_parent));
+ fsstack_copy_attr_atime(d_inode(dentry->d_parent),
+ d_inode(lower_dentry->d_parent));
BUG_ON(!d_count(lower_dentry));
ecryptfs_set_dentry_private(dentry, dentry_info);
@@ -353,27 +353,25 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry,
if (d_really_is_negative(lower_dentry)) {
/* We want to add because we couldn't find in lower */
d_add(dentry, NULL);
- return 0;
+ return NULL;
}
- inode = __ecryptfs_get_inode(lower_inode, dir_inode->i_sb);
+ inode = __ecryptfs_get_inode(lower_inode, dentry->d_sb);
if (IS_ERR(inode)) {
printk(KERN_ERR "%s: Error interposing; rc = [%ld]\n",
__func__, PTR_ERR(inode));
- return PTR_ERR(inode);
+ return ERR_CAST(inode);
}
if (S_ISREG(inode->i_mode)) {
rc = ecryptfs_i_size_read(dentry, inode);
if (rc) {
make_bad_inode(inode);
- return rc;
+ return ERR_PTR(rc);
}
}
if (inode->i_state & I_NEW)
unlock_new_inode(inode);
- d_add(dentry, inode);
-
- return rc;
+ return d_splice_alias(inode, dentry);
}
/**
@@ -390,55 +388,42 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
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 ecryptfs_mount_crypt_stat *mount_crypt_stat;
struct dentry *lower_dir_dentry, *lower_dentry;
+ const char *name = ecryptfs_dentry->d_name.name;
+ size_t len = ecryptfs_dentry->d_name.len;
+ struct dentry *res;
int rc = 0;
lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent);
- lower_dentry = lookup_one_len_unlocked(ecryptfs_dentry->d_name.name,
- lower_dir_dentry,
- ecryptfs_dentry->d_name.len);
- if (IS_ERR(lower_dentry)) {
- rc = PTR_ERR(lower_dentry);
- ecryptfs_printk(KERN_DEBUG, "%s: lookup_one_len() returned "
- "[%d] on lower_dentry = [%pd]\n", __func__, rc,
- ecryptfs_dentry);
- goto out;
- }
- if (d_really_is_positive(lower_dentry))
- 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,
- 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;
+ if (mount_crypt_stat
+ && (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)) {
+ rc = ecryptfs_encrypt_and_encode_filename(
+ &encrypted_and_encoded_name, &len,
+ mount_crypt_stat, name, len);
+ if (rc) {
+ printk(KERN_ERR "%s: Error attempting to encrypt and encode "
+ "filename; rc = [%d]\n", __func__, rc);
+ return ERR_PTR(rc);
+ }
+ name = encrypted_and_encoded_name;
}
- lower_dentry = lookup_one_len_unlocked(encrypted_and_encoded_name,
- lower_dir_dentry,
- encrypted_and_encoded_name_size);
+
+ lower_dentry = lookup_one_len_unlocked(name, lower_dir_dentry, len);
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;
+ "[%ld] on lower_dentry = [%s]\n", __func__,
+ PTR_ERR(lower_dentry),
+ name);
+ res = ERR_CAST(lower_dentry);
+ } else {
+ res = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry);
}
-interpose:
- rc = ecryptfs_lookup_interpose(ecryptfs_dentry, lower_dentry,
- ecryptfs_dir_inode);
-out:
kfree(encrypted_and_encoded_name);
- return ERR_PTR(rc);
+ return res;
}
static int ecryptfs_link(struct dentry *old_dentry, struct inode *dir,
@@ -1016,7 +1001,8 @@ static int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
}
int
-ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
+ecryptfs_setxattr(struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value,
size_t size, int flags)
{
int rc = 0;
@@ -1029,8 +1015,8 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
}
rc = vfs_setxattr(lower_dentry, name, value, size, flags);
- if (!rc && d_really_is_positive(dentry))
- fsstack_copy_attr_all(d_inode(dentry), d_inode(lower_dentry));
+ if (!rc && inode)
+ fsstack_copy_attr_all(inode, d_inode(lower_dentry));
out:
return rc;
}
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index 866bb18efefe..e818f5ac7a26 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/mount.h>
+#include <linux/file.h>
#include "ecryptfs_kernel.h"
struct ecryptfs_open_req {
@@ -147,7 +148,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
flags |= IS_RDONLY(d_inode(lower_dentry)) ? O_RDONLY : O_RDWR;
(*lower_file) = dentry_open(&req.path, flags, cred);
if (!IS_ERR(*lower_file))
- goto out;
+ goto have_file;
if ((flags & O_ACCMODE) == O_RDONLY) {
rc = PTR_ERR((*lower_file));
goto out;
@@ -165,8 +166,16 @@ int ecryptfs_privileged_open(struct file **lower_file,
mutex_unlock(&ecryptfs_kthread_ctl.mux);
wake_up(&ecryptfs_kthread_ctl.wait);
wait_for_completion(&req.done);
- if (IS_ERR(*lower_file))
+ if (IS_ERR(*lower_file)) {
rc = PTR_ERR(*lower_file);
+ goto out;
+ }
+have_file:
+ if ((*lower_file)->f_op->mmap == NULL) {
+ fput(*lower_file);
+ *lower_file = NULL;
+ rc = -EMEDIUMTYPE;
+ }
out:
return rc;
}
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 148d11b514fb..9c3437c8a5b1 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -442,7 +442,8 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
if (size < 0)
size = 8;
put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
- rc = lower_inode->i_op->setxattr(lower_dentry, ECRYPTFS_XATTR_NAME,
+ rc = lower_inode->i_op->setxattr(lower_dentry, lower_inode,
+ ECRYPTFS_XATTR_NAME,
xattr_virt, size, 0);
inode_unlock(lower_inode);
if (rc)
OpenPOWER on IntegriCloud