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f2fs crypto: add alloc_bounce_page 

This patch adds alloc_bounce_page likewise ext4.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-06-11 14:33:29 -07:00
parent 7e8e754a4b
commit 43f54cd52f
1 changed files with 15 additions and 8 deletions
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23
fs/f2fs/crypto.c
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@ -376,6 +376,15 @@ static int f2fs_page_crypto(struct f2fs_crypto_ctx *ctx,
return 0;
}
static struct page *alloc_bounce_page(struct f2fs_crypto_ctx *ctx)
{
ctx->w.bounce_page = mempool_alloc(f2fs_bounce_page_pool, GFP_NOWAIT);
if (ctx->w.bounce_page == NULL)
return ERR_PTR(-ENOMEM);
ctx->flags |= F2FS_WRITE_PATH_FL;
return ctx->w.bounce_page;
}
/**
* f2fs_encrypt() - Encrypts a page
* @inode: The inode for which the encryption should take place
@ -405,19 +414,17 @@ struct page *f2fs_encrypt(struct inode *inode,
return (struct page *)ctx;
/* The encryption operation will require a bounce page. */
ciphertext_page = mempool_alloc(f2fs_bounce_page_pool, GFP_NOWAIT);
if (!ciphertext_page) {
err = -ENOMEM;
ciphertext_page = alloc_bounce_page(ctx);
if (IS_ERR(ciphertext_page))
goto err_out;
}
ctx->flags |= F2FS_WRITE_PATH_FL;
ctx->w.bounce_page = ciphertext_page;
ctx->w.control_page = plaintext_page;
err = f2fs_page_crypto(ctx, inode, F2FS_ENCRYPT, plaintext_page->index,
plaintext_page, ciphertext_page);
if (err)
if (err) {
ciphertext_page = ERR_PTR(err);
goto err_out;
}
SetPagePrivate(ciphertext_page);
set_page_private(ciphertext_page, (unsigned long)ctx);
@ -426,7 +433,7 @@ struct page *f2fs_encrypt(struct inode *inode,
err_out:
f2fs_release_crypto_ctx(ctx);
return ERR_PTR(err);
return ciphertext_page;
}
/**