eCryptfs: Rename ecryptfs_crypt_stat.num_header_bytes_at_front
Tyler Hicks [Thu, 11 Feb 2010 11:09:14 +0000 (05:09 -0600)]
This patch renames the num_header_bytes_at_front variable to
metadata_size since it now contains the max size of the metadata.

Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>

fs/ecryptfs/crypto.c
fs/ecryptfs/ecryptfs_kernel.h
fs/ecryptfs/inode.c
fs/ecryptfs/mmap.c

index c907f6f..391f558 100644 (file)
@@ -834,14 +834,13 @@ void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat)
        set_extent_mask_and_shift(crypt_stat);
        crypt_stat->iv_bytes = ECRYPTFS_DEFAULT_IV_BYTES;
        if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
-               crypt_stat->num_header_bytes_at_front =
-                                       ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
+               crypt_stat->metadata_size = ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
        else {
                if (PAGE_CACHE_SIZE <= ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)
-                       crypt_stat->num_header_bytes_at_front =
+                       crypt_stat->metadata_size =
                                ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
                else
-                       crypt_stat->num_header_bytes_at_front = PAGE_CACHE_SIZE;
+                       crypt_stat->metadata_size = PAGE_CACHE_SIZE;
        }
 }
 
@@ -1238,8 +1237,7 @@ ecryptfs_write_header_metadata(char *virt,
 
        header_extent_size = (u32)crypt_stat->extent_size;
        num_header_extents_at_front =
-               (u16)(crypt_stat->num_header_bytes_at_front
-                     / crypt_stat->extent_size);
+               (u16)(crypt_stat->metadata_size / crypt_stat->extent_size);
        put_unaligned_be32(header_extent_size, virt);
        virt += 4;
        put_unaligned_be16(num_header_extents_at_front, virt);
@@ -1382,7 +1380,7 @@ int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry)
                rc = -EINVAL;
                goto out;
        }
-       virt_len = crypt_stat->num_header_bytes_at_front;
+       virt_len = crypt_stat->metadata_size;
        order = get_order(virt_len);
        /* Released in this function */
        virt = (char *)ecryptfs_get_zeroed_pages(GFP_KERNEL, order);
@@ -1428,16 +1426,15 @@ static int parse_header_metadata(struct ecryptfs_crypt_stat *crypt_stat,
        header_extent_size = get_unaligned_be32(virt);
        virt += sizeof(__be32);
        num_header_extents_at_front = get_unaligned_be16(virt);
-       crypt_stat->num_header_bytes_at_front =
-               (((size_t)num_header_extents_at_front
-                 * (size_t)header_extent_size));
+       crypt_stat->metadata_size = (((size_t)num_header_extents_at_front
+                                    * (size_t)header_extent_size));
        (*bytes_read) = (sizeof(__be32) + sizeof(__be16));
        if ((validate_header_size == ECRYPTFS_VALIDATE_HEADER_SIZE)
-           && (crypt_stat->num_header_bytes_at_front
+           && (crypt_stat->metadata_size
                < ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)) {
                rc = -EINVAL;
                printk(KERN_WARNING "Invalid header size: [%zd]\n",
-                      crypt_stat->num_header_bytes_at_front);
+                      crypt_stat->metadata_size);
        }
        return rc;
 }
@@ -1452,8 +1449,7 @@ static int parse_header_metadata(struct ecryptfs_crypt_stat *crypt_stat,
  */
 static void set_default_header_data(struct ecryptfs_crypt_stat *crypt_stat)
 {
-       crypt_stat->num_header_bytes_at_front =
-               ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
+       crypt_stat->metadata_size = ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE;
 }
 
 /**
index 8456f70..d031efd 100644 (file)
@@ -273,7 +273,7 @@ struct ecryptfs_crypt_stat {
        u32 flags;
        unsigned int file_version;
        size_t iv_bytes;
-       size_t num_header_bytes_at_front;
+       size_t metadata_size;
        size_t extent_size; /* Data extent size; default is 4096 */
        size_t key_size;
        size_t extent_shift;
@@ -469,7 +469,7 @@ ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
 {
        if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
                return 0;
-       return crypt_stat->num_header_bytes_at_front;
+       return crypt_stat->metadata_size;
 }
 
 static inline struct ecryptfs_file_info *
index 1a73953..a50efb1 100644 (file)
@@ -335,7 +335,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
                ecryptfs_dentry->d_sb)->mount_crypt_stat;
        if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) {
                if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
-                       file_size = (crypt_stat->num_header_bytes_at_front
+                       file_size = (crypt_stat->metadata_size
                                     + i_size_read(lower_dentry->d_inode));
                else
                        file_size = i_size_read(lower_dentry->d_inode);
index 5a30e01..270f42a 100644 (file)
@@ -122,8 +122,7 @@ ecryptfs_copy_up_encrypted_with_header(struct page *page,
                                           * num_extents_per_page)
                                          + extent_num_in_page);
                size_t num_header_extents_at_front =
-                       (crypt_stat->num_header_bytes_at_front
-                        / crypt_stat->extent_size);
+                       (crypt_stat->metadata_size / crypt_stat->extent_size);
 
                if (view_extent_num < num_header_extents_at_front) {
                        /* This is a header extent */
@@ -152,7 +151,7 @@ ecryptfs_copy_up_encrypted_with_header(struct page *page,
                        /* This is an encrypted data extent */
                        loff_t lower_offset =
                                ((view_extent_num * crypt_stat->extent_size)
-                                - crypt_stat->num_header_bytes_at_front);
+                                - crypt_stat->metadata_size);
 
                        rc = ecryptfs_read_lower_page_segment(
                                page, (lower_offset >> PAGE_CACHE_SHIFT),