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authorJaegeuk Kim <jaegeuk@kernel.org>2016-07-10 14:01:03 -0400
committerTheodore Ts'o <tytso@mit.edu>2016-07-10 14:01:03 -0400
commita7550b30ab709ffb9bbe48669adf7d8556f3698f (patch)
tree5ed986d93b2df41cad68bdfa0851604bb039d1d1 /fs/ext4/page-io.c
parentff0031d848a0cd7002606f9feef958de8d5edf19 (diff)
ext4 crypto: migrate into vfs's crypto engine
This patch removes the most parts of internal crypto codes. And then, it modifies and adds some ext4-specific crypt codes to use the generic facility. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/page-io.c')
-rw-r--r--fs/ext4/page-io.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 2a01df9cc1c3..5ad05af51dd8 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/backing-dev.h>
+#include <linux/fscrypto.h>
#include "ext4_jbd2.h"
#include "xattr.h"
@@ -67,7 +68,6 @@ static void ext4_finish_bio(struct bio *bio)
struct page *page = bvec->bv_page;
#ifdef CONFIG_EXT4_FS_ENCRYPTION
struct page *data_page = NULL;
- struct ext4_crypto_ctx *ctx = NULL;
#endif
struct buffer_head *bh, *head;
unsigned bio_start = bvec->bv_offset;
@@ -82,8 +82,7 @@ static void ext4_finish_bio(struct bio *bio)
if (!page->mapping) {
/* The bounce data pages are unmapped. */
data_page = page;
- ctx = (struct ext4_crypto_ctx *)page_private(data_page);
- page = ctx->w.control_page;
+ fscrypt_pullback_bio_page(&page, false);
}
#endif
@@ -113,8 +112,8 @@ static void ext4_finish_bio(struct bio *bio)
local_irq_restore(flags);
if (!under_io) {
#ifdef CONFIG_EXT4_FS_ENCRYPTION
- if (ctx)
- ext4_restore_control_page(data_page);
+ if (data_page)
+ fscrypt_restore_control_page(data_page);
#endif
end_page_writeback(page);
}
@@ -472,7 +471,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
gfp_t gfp_flags = GFP_NOFS;
retry_encrypt:
- data_page = ext4_encrypt(inode, page, gfp_flags);
+ data_page = fscrypt_encrypt_page(inode, page, gfp_flags);
if (IS_ERR(data_page)) {
ret = PTR_ERR(data_page);
if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
@@ -510,7 +509,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
if (ret) {
out:
if (data_page)
- ext4_restore_control_page(data_page);
+ fscrypt_restore_control_page(data_page);
printk_ratelimited(KERN_ERR "%s: ret = %d\n", __func__, ret);
redirty_page_for_writepage(wbc, page);
do {