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Date: Sun, 16 Jun 2019 21:38:10 +0530 From: Chandan Rajendra <chandan@...ux.ibm.com> To: linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-fscrypt@...r.kernel.org Cc: Chandan Rajendra <chandan@...ux.ibm.com>, tytso@....edu, adilger.kernel@...ger.ca, ebiggers@...nel.org, jaegeuk@...nel.org, yuchao0@...wei.com, hch@...radead.org Subject: [PATCH V3 4/7] fs/mpage.c: Integrate read callbacks This commit adds code to make do_mpage_readpage() to be "read callbacks" aware i.e. for files requiring decryption, do_mpage_readpage() now sets up the read callbacks state machine when allocating a bio and later starts execution of the state machine after file data is read from the underlying disk. Signed-off-by: Chandan Rajendra <chandan@...ux.ibm.com> --- fs/mpage.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/mpage.c b/fs/mpage.c index 436a85260394..611ad122fc92 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -30,6 +30,7 @@ #include <linux/backing-dev.h> #include <linux/pagevec.h> #include <linux/cleancache.h> +#include <linux/read_callbacks.h> #include "internal.h" /* @@ -49,6 +50,8 @@ static void mpage_end_io(struct bio *bio) struct bio_vec *bv; struct bvec_iter_all iter_all; + if (read_callbacks_end_bio(bio)) + return; bio_for_each_segment_all(bv, bio, iter_all) { struct page *page = bv->bv_page; page_endio(page, bio_op(bio), @@ -309,6 +312,12 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args) gfp); if (args->bio == NULL) goto confused; + + if (read_callbacks_setup(inode, args->bio, NULL)) { + bio_put(args->bio); + args->bio = NULL; + goto confused; + } } length = first_hole << blkbits; @@ -330,7 +339,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args) confused: if (args->bio) args->bio = mpage_bio_submit(REQ_OP_READ, op_flags, args->bio); - if (!PageUptodate(page)) + if (!PageUptodate(page) && !PageError(page)) block_read_full_page(page, args->get_block); else unlock_page(page); -- 2.19.1
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