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Date: Tue, 12 May 2015 14:19:14 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 1/3] ext4 crypto: move io_completion work into crypto.c
In order to use this completion work across the filesystems, it'd be better to
relocate them into crypto.c.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/ext4/crypto.c | 38 ++++++++++++++++++++++++++++++++++++--
fs/ext4/ext4.h | 2 +-
fs/ext4/readpage.c | 35 +----------------------------------
3 files changed, 38 insertions(+), 37 deletions(-)
diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c
index 1484b58..04c620f 100644
--- a/fs/ext4/crypto.c
+++ b/fs/ext4/crypto.c
@@ -55,6 +55,9 @@ static mempool_t *ext4_bounce_page_pool;
static LIST_HEAD(ext4_free_crypto_ctxs);
static DEFINE_SPINLOCK(ext4_crypto_ctx_lock);
+static struct workqueue_struct *ext4_read_workqueue;
+static DEFINE_MUTEX(crypto_init);
+
static struct kmem_cache *ext4_crypto_ctx_cachep;
struct kmem_cache *ext4_crypt_info_cachep;
@@ -175,8 +178,39 @@ out:
return ctx;
}
-struct workqueue_struct *ext4_read_workqueue;
-static DEFINE_MUTEX(crypto_init);
+/*
+ * Call ext4_decrypt on every single page, reusing the encryption
+ * context.
+ */
+static void completion_pages(struct work_struct *work)
+{
+ struct ext4_crypto_ctx *ctx =
+ container_of(work, struct ext4_crypto_ctx, r.work);
+ struct bio *bio = ctx->r.bio;
+ struct bio_vec *bv;
+ int i;
+
+ bio_for_each_segment_all(bv, bio, i) {
+ struct page *page = bv->bv_page;
+
+ int ret = ext4_decrypt(ctx, page);
+ if (ret) {
+ WARN_ON_ONCE(1);
+ SetPageError(page);
+ } else
+ SetPageUptodate(page);
+ unlock_page(page);
+ }
+ ext4_release_crypto_ctx(ctx);
+ bio_put(bio);
+}
+
+void ext4_end_io_crypto_work(struct ext4_crypto_ctx *ctx, struct bio *bio)
+{
+ INIT_WORK(&ctx->r.work, completion_pages);
+ ctx->r.bio = bio;
+ queue_work(ext4_read_workqueue, &ctx->r.work);
+}
/**
* ext4_exit_crypto() - Shutdown the ext4 encryption system
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 550fe95..505bc66 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2062,7 +2062,7 @@ int ext4_get_policy(struct inode *inode,
extern struct kmem_cache *ext4_crypt_info_cachep;
bool ext4_valid_contents_enc_mode(uint32_t mode);
uint32_t ext4_validate_encryption_key_size(uint32_t mode, uint32_t size);
-extern struct workqueue_struct *ext4_read_workqueue;
+void ext4_end_io_crypto_work(struct ext4_crypto_ctx *ctx, struct bio *bio);
struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode);
void ext4_release_crypto_ctx(struct ext4_crypto_ctx *ctx);
void ext4_restore_control_page(struct page *data_page);
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index ec3ef93..a7b074e 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -46,37 +46,6 @@
#include "ext4.h"
-/*
- * Call ext4_decrypt on every single page, reusing the encryption
- * context.
- */
-static void completion_pages(struct work_struct *work)
-{
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
- struct ext4_crypto_ctx *ctx =
- container_of(work, struct ext4_crypto_ctx, r.work);
- struct bio *bio = ctx->r.bio;
- struct bio_vec *bv;
- int i;
-
- bio_for_each_segment_all(bv, bio, i) {
- struct page *page = bv->bv_page;
-
- int ret = ext4_decrypt(ctx, page);
- if (ret) {
- WARN_ON_ONCE(1);
- SetPageError(page);
- } else
- SetPageUptodate(page);
- unlock_page(page);
- }
- ext4_release_crypto_ctx(ctx);
- bio_put(bio);
-#else
- BUG();
-#endif
-}
-
static inline bool ext4_bio_encrypted(struct bio *bio)
{
#ifdef CONFIG_EXT4_FS_ENCRYPTION
@@ -109,9 +78,7 @@ static void mpage_end_io(struct bio *bio, int err)
if (err) {
ext4_release_crypto_ctx(ctx);
} else {
- INIT_WORK(&ctx->r.work, completion_pages);
- ctx->r.bio = bio;
- queue_work(ext4_read_workqueue, &ctx->r.work);
+ ext4_end_io_crypto_work(ctx, bio);
return;
}
}
--
2.1.1
--
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