diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/crypto.c | 31 | ||||
| -rw-r--r-- | fs/ext4/ext4_crypto.h | 21 | ||||
| -rw-r--r-- | fs/ext4/page-io.c | 2 | ||||
| -rw-r--r-- | fs/ext4/readpage.c | 10 |
4 files changed, 30 insertions, 34 deletions
diff --git a/fs/ext4/crypto.c b/fs/ext4/crypto.c index 9969d05..28a0e4bd 100644 --- a/fs/ext4/crypto.c +++ b/fs/ext4/crypto.c @@ -71,14 +71,14 @@ void ext4_release_crypto_ctx(struct ext4_crypto_ctx *ctx) { unsigned long flags; - if (ctx->bounce_page) { + if (ctx->flags & EXT4_WRITE_PATH_FL && ctx->w.bounce_page) { if (ctx->flags & EXT4_BOUNCE_PAGE_REQUIRES_FREE_ENCRYPT_FL) - __free_page(ctx->bounce_page); + __free_page(ctx->w.bounce_page); else - mempool_free(ctx->bounce_page, ext4_bounce_page_pool); - ctx->bounce_page = NULL; + mempool_free(ctx->w.bounce_page, ext4_bounce_page_pool); } - ctx->control_page = NULL; + ctx->w.bounce_page = NULL; + ctx->w.control_page = NULL; if (ctx->flags & EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL) { if (ctx->tfm) crypto_free_tfm(ctx->tfm); @@ -134,6 +134,7 @@ struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode) } else { ctx->flags &= ~EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL; } + ctx->flags &= ~EXT4_WRITE_PATH_FL; /* Allocate a new Crypto API context if we don't already have * one or if it isn't the right mode. */ @@ -165,10 +166,6 @@ struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode) } BUG_ON(ci->ci_size != ext4_encryption_key_size(ci->ci_data_mode)); - /* There shouldn't be a bounce page attached to the crypto - * context at this point. */ - BUG_ON(ctx->bounce_page); - out: if (res) { if (!IS_ERR_OR_NULL(ctx)) @@ -189,15 +186,6 @@ void ext4_exit_crypto(void) struct ext4_crypto_ctx *pos, *n; list_for_each_entry_safe(pos, n, &ext4_free_crypto_ctxs, free_list) { - if (pos->bounce_page) { - if (pos->flags & - EXT4_BOUNCE_PAGE_REQUIRES_FREE_ENCRYPT_FL) { - __free_page(pos->bounce_page); - } else { - mempool_free(pos->bounce_page, - ext4_bounce_page_pool); - } - } if (pos->tfm) crypto_free_tfm(pos->tfm); kmem_cache_free(ext4_crypto_ctx_cachep, pos); @@ -425,8 +413,9 @@ struct page *ext4_encrypt(struct inode *inode, } else { ctx->flags |= EXT4_BOUNCE_PAGE_REQUIRES_FREE_ENCRYPT_FL; } - ctx->bounce_page = ciphertext_page; - ctx->control_page = plaintext_page; + ctx->flags |= EXT4_WRITE_PATH_FL; + ctx->w.bounce_page = ciphertext_page; + ctx->w.control_page = plaintext_page; err = ext4_page_crypto(ctx, inode, EXT4_ENCRYPT, plaintext_page->index, plaintext_page, ciphertext_page); if (err) { @@ -505,7 +494,7 @@ int ext4_encrypted_zeroout(struct inode *inode, struct ext4_extent *ex) } else { ctx->flags |= EXT4_BOUNCE_PAGE_REQUIRES_FREE_ENCRYPT_FL; } - ctx->bounce_page = ciphertext_page; + ctx->w.bounce_page = ciphertext_page; while (len--) { err = ext4_page_crypto(ctx, inode, EXT4_ENCRYPT, lblk, diff --git a/fs/ext4/ext4_crypto.h b/fs/ext4/ext4_crypto.h index 69faf0e..c5258f2 100644 --- a/fs/ext4/ext4_crypto.h +++ b/fs/ext4/ext4_crypto.h @@ -86,16 +86,23 @@ struct ext4_crypt_info { #define EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL 0x00000001 #define EXT4_BOUNCE_PAGE_REQUIRES_FREE_ENCRYPT_FL 0x00000002 +#define EXT4_WRITE_PATH_FL 0x00000004 struct ext4_crypto_ctx { struct crypto_tfm *tfm; /* Crypto API context */ - struct page *bounce_page; /* Ciphertext page on write path */ - struct page *control_page; /* Original page on write path */ - struct bio *bio; /* The bio for this context */ - struct work_struct work; /* Work queue for read complete path */ - struct list_head free_list; /* Free list */ - int flags; /* Flags */ - int mode; /* Encryption mode for tfm */ + union { + struct { + struct page *bounce_page; /* Ciphertext page */ + struct page *control_page; /* Original page */ + } w; + struct { + struct bio *bio; + struct work_struct work; + } r; + struct list_head free_list; /* Free list */ + }; + char flags; /* Flags */ + char mode; /* Encryption mode for tfm */ }; struct ext4_completion_result { diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 5765f88..79636e2 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -84,7 +84,7 @@ static void ext4_finish_bio(struct bio *bio) /* The bounce data pages are unmapped. */ data_page = page; ctx = (struct ext4_crypto_ctx *)page_private(data_page); - page = ctx->control_page; + page = ctx->w.control_page; } #endif diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c index 171b9ac..ec3ef93 100644 --- a/fs/ext4/readpage.c +++ b/fs/ext4/readpage.c @@ -54,8 +54,8 @@ 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, work); - struct bio *bio = ctx->bio; + container_of(work, struct ext4_crypto_ctx, r.work); + struct bio *bio = ctx->r.bio; struct bio_vec *bv; int i; @@ -109,9 +109,9 @@ static void mpage_end_io(struct bio *bio, int err) if (err) { ext4_release_crypto_ctx(ctx); } else { - INIT_WORK(&ctx->work, completion_pages); - ctx->bio = bio; - queue_work(ext4_read_workqueue, &ctx->work); + INIT_WORK(&ctx->r.work, completion_pages); + ctx->r.bio = bio; + queue_work(ext4_read_workqueue, &ctx->r.work); return; } } |