1 files changed, 32 insertions, 17 deletions

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index bdca1f4b3a3e..8b65f289ee00 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1324,14 +1324,13 @@ static int ecryptfs_write_headers_virt(char *page_virt, size_t max,
 }
 
 static int
-ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
-                                    struct dentry *ecryptfs_dentry,
-                                    char *virt)
+ecryptfs_write_metadata_to_contents(struct dentry *ecryptfs_dentry,
+                                    char *virt, size_t virt_len)
 {
         int rc;
 
         rc = ecryptfs_write_lower(ecryptfs_dentry->d_inode, virt,
-                                  0, crypt_stat->num_header_bytes_at_front);
+                                  0, virt_len);
         if (rc)
                 printk(KERN_ERR "%s: Error attempting to write header "
                        "information to lower file; rc = [%d]\n", __func__,
@@ -1341,7 +1340,6 @@ ecryptfs_write_metadata_to_contents(struct ecryptfs_crypt_stat *crypt_stat,
 
 static int
 ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
-                                 struct ecryptfs_crypt_stat *crypt_stat,
                                  char *page_virt, size_t size)
 {
         int rc;
@@ -1351,6 +1349,17 @@ ecryptfs_write_metadata_to_xattr(struct dentry *ecryptfs_dentry,
         return rc;
 }
 
+static unsigned long ecryptfs_get_zeroed_pages(gfp_t gfp_mask,
+                                               unsigned int order)
+{
+        struct page *page;
+
+        page = alloc_pages(gfp_mask | __GFP_ZERO, order);
+        if (page)
+                return (unsigned long) page_address(page);
+        return 0;
+}
+
 /**
  * ecryptfs_write_metadata
  * @ecryptfs_dentry: The eCryptfs dentry
@@ -1367,7 +1376,9 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
 {
         struct ecryptfs_crypt_stat *crypt_stat =
                 &ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->crypt_stat;
+        unsigned int order;
         char *virt;
+        size_t virt_len;
         size_t size = 0;
         int rc = 0;
 
@@ -1383,33 +1394,35 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
                 rc = -EINVAL;
                 goto out;
         }
+        virt_len = crypt_stat->num_header_bytes_at_front;
+        order = get_order(virt_len);
         /* Released in this function */
-        virt = (char *)get_zeroed_page(GFP_KERNEL);
+        virt = (char *)ecryptfs_get_zeroed_pages(GFP_KERNEL, order);
         if (!virt) {
                 printk(KERN_ERR "%s: Out of memory\n", __func__);
                 rc = -ENOMEM;
                 goto out;
         }
-        rc = ecryptfs_write_headers_virt(virt, PAGE_CACHE_SIZE, &size,
-                                         crypt_stat, ecryptfs_dentry);
+        rc = ecryptfs_write_headers_virt(virt, virt_len, &size, crypt_stat,
+                                         ecryptfs_dentry);
         if (unlikely(rc)) {
                 printk(KERN_ERR "%s: Error whilst writing headers; rc = [%d]\n",
                        __func__, rc);
                 goto out_free;
         }
         if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
-                rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry,
-                                                      crypt_stat, virt, size);
+                rc = ecryptfs_write_metadata_to_xattr(ecryptfs_dentry, virt,
+                                                      size);
         else
-                rc = ecryptfs_write_metadata_to_contents(crypt_stat,
-                                                         ecryptfs_dentry, virt);
+                rc = ecryptfs_write_metadata_to_contents(ecryptfs_dentry, virt,
+                                                         virt_len);
         if (rc) {
                 printk(KERN_ERR "%s: Error writing metadata out to lower file; "
                        "rc = [%d]\n", __func__, rc);
                 goto out_free;
         }
 out_free:
-        free_page((unsigned long)virt);
+        free_pages((unsigned long)virt, order);
 out:
         return rc;
 }
@@ -2208,17 +2221,19 @@ int ecryptfs_decode_and_decrypt_filename(char **plaintext_name,
                                          struct dentry *ecryptfs_dir_dentry,
                                          const char *name, size_t name_size)
 {
+        struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
+                &ecryptfs_superblock_to_private(
+                        ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
         char *decoded_name;
         size_t decoded_name_size;
         size_t packet_size;
         int rc = 0;
 
-        if ((name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
+        if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
+            && !(mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
+            && (name_size > ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE)
             && (strncmp(name, ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX,
                         ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE) == 0)) {
-                struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
-                        &ecryptfs_superblock_to_private(
-                                ecryptfs_dir_dentry->d_sb)->mount_crypt_stat;
                 const char *orig_name = name;
                 size_t orig_name_size = name_size;