From: Gao Xiang <gaoxiang25@huawei.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
<devel@driverdev.osuosl.org>
Cc: <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-erofs@lists.ozlabs.org>, <yuchao0@huawei.com>,
<miaoxie@huawei.com>, <weidu.du@huawei.com>, <hsiangkao@aol.com>,
<chao@kernel.org>, Gao Xiang <gaoxiang25@huawei.com>
Subject: [PATCH 17/25] staging: erofs: globalize prepare_bio and __submit_bio
Date: Thu, 26 Jul 2018 20:22:00 +0800 [thread overview]
Message-ID: <1532607728-103372-18-git-send-email-gaoxiang25@huawei.com> (raw)
In-Reply-To: <1532607728-103372-1-git-send-email-gaoxiang25@huawei.com>
The unzip subsystem also uses these functions,
let's export them to internal.h.
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
drivers/staging/erofs/data.c | 34 +++++++++-------------------------
drivers/staging/erofs/internal.h | 33 +++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+), 25 deletions(-)
diff --git a/drivers/staging/erofs/data.c b/drivers/staging/erofs/data.c
index 163bfe6..ac263a1 100644
--- a/drivers/staging/erofs/data.c
+++ b/drivers/staging/erofs/data.c
@@ -38,26 +38,6 @@ static inline void read_endio(struct bio *bio)
bio_put(bio);
}
-static void __submit_bio(struct bio *bio, unsigned op, unsigned op_flags)
-{
- bio_set_op_attrs(bio, op, op_flags);
- submit_bio(bio);
-}
-
-static struct bio *prepare_bio(struct super_block *sb,
- erofs_blk_t blkaddr, unsigned nr_pages)
-{
- struct bio *bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, nr_pages);
-
- BUG_ON(bio == NULL);
-
- bio->bi_end_io = read_endio;
- bio_set_dev(bio, sb->s_bdev);
- bio->bi_iter.bi_sector = blkaddr << LOG_SECTORS_PER_BLOCK;
-
- return bio;
-}
-
/* prio -- true is used for dir */
struct page *erofs_get_meta_page(struct super_block *sb,
erofs_blk_t blkaddr, bool prio)
@@ -80,7 +60,7 @@ struct page *erofs_get_meta_page(struct super_block *sb,
struct bio *bio;
int err;
- bio = prepare_bio(sb, blkaddr, 1);
+ bio = prepare_bio(sb, blkaddr, 1, read_endio);
err = bio_add_page(bio, page, PAGE_SIZE, 0);
BUG_ON(err != PAGE_SIZE);
@@ -236,6 +216,8 @@ static inline struct bio *erofs_read_raw_page(
struct erofs_map_blocks map = {
.m_la = blknr_to_addr(current_block),
};
+ erofs_blk_t blknr;
+ unsigned blkoff;
err = erofs_map_blocks(inode, &map, EROFS_GET_BLOCKS_RAW);
if (unlikely(err))
@@ -253,6 +235,9 @@ static inline struct bio *erofs_read_raw_page(
/* for RAW access mode, m_plen must be equal to m_llen */
BUG_ON(map.m_plen != map.m_llen);
+ blknr = erofs_blknr(map.m_pa);
+ blkoff = erofs_blkoff(map.m_pa);
+
/* deal with inline page */
if (map.m_flags & EROFS_MAP_META) {
void *vsrc, *vto;
@@ -260,8 +245,7 @@ static inline struct bio *erofs_read_raw_page(
BUG_ON(map.m_plen > PAGE_SIZE);
- ipage = erofs_get_meta_page(inode->i_sb,
- erofs_blknr(map.m_pa), 0);
+ ipage = erofs_get_meta_page(inode->i_sb, blknr, 0);
if (IS_ERR(ipage)) {
err = PTR_ERR(ipage);
@@ -270,7 +254,7 @@ static inline struct bio *erofs_read_raw_page(
vsrc = kmap_atomic(ipage);
vto = kmap_atomic(page);
- memcpy(vto, vsrc + erofs_blkoff(map.m_pa), map.m_plen);
+ memcpy(vto, vsrc + blkoff, map.m_plen);
memset(vto + map.m_plen, 0, PAGE_SIZE - map.m_plen);
kunmap_atomic(vto);
kunmap_atomic(vsrc);
@@ -294,7 +278,7 @@ static inline struct bio *erofs_read_raw_page(
if (nblocks > BIO_MAX_PAGES)
nblocks = BIO_MAX_PAGES;
- bio = prepare_bio(inode->i_sb, erofs_blknr(map.m_pa), nblocks);
+ bio = prepare_bio(inode->i_sb, blknr, nblocks, read_endio);
}
err = bio_add_page(bio, page, PAGE_SIZE, 0);
diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
index 210ab6c..6a0f045 100644
--- a/drivers/staging/erofs/internal.h
+++ b/drivers/staging/erofs/internal.h
@@ -285,6 +285,39 @@ struct erofs_map_blocks {
#define EROFS_GET_BLOCKS_RAW 0x0001
/* data.c */
+static inline struct bio *prepare_bio(
+ struct super_block *sb,
+ erofs_blk_t blkaddr, unsigned nr_pages,
+ bio_end_io_t endio)
+{
+ gfp_t gfp = GFP_NOIO;
+ struct bio *bio = bio_alloc(gfp, nr_pages);
+
+ if (unlikely(bio == NULL) &&
+ (current->flags & PF_MEMALLOC)) {
+ do {
+ nr_pages /= 2;
+ if (unlikely(!nr_pages)) {
+ bio = bio_alloc(gfp | __GFP_NOFAIL, 1);
+ BUG_ON(bio == NULL);
+ break;
+ }
+ bio = bio_alloc(gfp, nr_pages);
+ } while (bio == NULL);
+ }
+
+ bio->bi_end_io = endio;
+ bio_set_dev(bio, sb->s_bdev);
+ bio->bi_iter.bi_sector = blkaddr << LOG_SECTORS_PER_BLOCK;
+ return bio;
+}
+
+static inline void __submit_bio(struct bio *bio, unsigned op, unsigned op_flags)
+{
+ bio_set_op_attrs(bio, op, op_flags);
+ submit_bio(bio);
+}
+
extern struct page *erofs_get_meta_page(struct super_block *sb,
erofs_blk_t blkaddr, bool prio);
extern int erofs_map_blocks(struct inode *, struct erofs_map_blocks *, int);
--
1.9.1
next prev parent reply other threads:[~2018-07-26 12:28 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-31 11:06 [NOMERGE] [RFC PATCH 00/12] erofs: introduce erofs file system Gao Xiang
2018-06-01 7:48 ` Richard Weinberger
2018-06-01 9:11 ` Gao Xiang
2018-06-01 9:28 ` Richard Weinberger
2018-06-01 11:16 ` Gao Xiang
2018-06-07 10:26 ` Pavel Machek
2018-07-27 0:55 ` Joey Pabalinas
2018-07-27 0:57 ` Joey Pabalinas
2018-07-26 12:21 ` [PATCH 00/25] staging: " Gao Xiang
2018-07-26 12:21 ` [PATCH 01/25] staging: erofs: add on-disk layout Gao Xiang
2018-07-26 12:21 ` [PATCH 02/25] staging: erofs: add erofs in-memory stuffs Gao Xiang
2018-07-26 12:21 ` [PATCH 03/25] staging: erofs: add super block operations Gao Xiang
2018-07-26 12:21 ` [PATCH 04/25] staging: erofs: add raw address_space operations Gao Xiang
2018-07-26 12:21 ` [PATCH 05/25] staging: erofs: add inode operations Gao Xiang
2018-07-26 12:21 ` [PATCH 06/25] staging: erofs: add directory operations Gao Xiang
2018-07-26 12:21 ` [PATCH 07/25] staging: erofs: add namei functions Gao Xiang
2018-07-26 12:21 ` [PATCH 08/25] staging: erofs: update Kconfig and Makefile Gao Xiang
2018-07-26 12:21 ` [PATCH 09/25] staging: erofs: introduce xattr & acl support Gao Xiang
2018-07-26 12:21 ` [PATCH 10/25] staging: erofs: support special inode Gao Xiang
2018-07-26 12:21 ` [PATCH 11/25] staging: erofs: introduce error injection infrastructure Gao Xiang
2018-07-26 12:21 ` [PATCH 12/25] staging: erofs: support tracepoint Gao Xiang
2018-07-26 12:21 ` [PATCH 13/25] staging: erofs: <linux/tagptr.h>: introduce tagged pointer Gao Xiang
2018-07-26 12:21 ` [PATCH 14/25] staging: erofs: introduce pagevec for unzip subsystem Gao Xiang
2018-07-26 12:21 ` [PATCH 15/25] staging: erofs: add erofs_map_blocks_iter Gao Xiang
2018-07-26 12:21 ` [PATCH 16/25] staging: erofs: add erofs_allocpage Gao Xiang
2018-07-26 12:22 ` Gao Xiang [this message]
2018-07-26 12:22 ` [PATCH 18/25] staging: erofs: introduce a customized LZ4 decompression Gao Xiang
2018-07-26 12:22 ` [PATCH 19/25] staging: erofs: add a generic z_erofs VLE decompressor Gao Xiang
2018-07-26 12:22 ` [PATCH 20/25] staging: erofs: introduce superblock registration Gao Xiang
2018-07-26 12:22 ` [PATCH 21/25] staging: erofs: introduce erofs shrinker Gao Xiang
2018-07-26 12:22 ` [PATCH 22/25] staging: erofs: introduce workstation for decompression Gao Xiang
2018-07-26 12:22 ` [PATCH 23/25] staging: erofs: introduce VLE decompression support Gao Xiang
2018-07-26 12:22 ` [PATCH 24/25] staging: erofs: introduce cached decompression Gao Xiang
2018-07-26 12:22 ` [PATCH 25/25] staging: erofs: add a TODO and update MAINTAINERS for staging Gao Xiang
2018-07-28 7:10 ` [PATCH] staging: erofs: fix a compile warning of Z_EROFS_VLE_VMAP_ONSTACK_PAGES Gao Xiang
2018-07-28 10:43 ` Chao Yu
2018-07-29 5:34 ` [PATCH 1/2] staging: erofs: fix compile error without built-in decompression support Gao Xiang
2018-07-29 5:37 ` [PATCH 2/2] staging: erofs: fix conditional uninitialized `pcn' in z_erofs_map_blocks_iter Gao Xiang
2018-07-30 1:51 ` [PATCH] staging: erofs: use the wrapped PTR_ERR_OR_ZERO instead of open code Gao Xiang
2018-07-30 6:58 ` Chao Yu
2018-08-01 6:38 ` [PATCH 1/2] staging: erofs: add the missing break in z_erofs_map_blocks_iter Gao Xiang
2018-08-01 6:38 ` [PATCH 2/2] staging: erofs: remove a redundant marco in xattr Gao Xiang
2018-08-01 9:02 ` [PATCH 1/2] staging: erofs: add the missing break in z_erofs_map_blocks_iter Dan Carpenter
2018-08-01 9:19 ` Gao Xiang
2018-08-01 9:36 ` [PATCH RESEND " Gao Xiang
2018-08-01 11:36 ` Dan Carpenter
2018-08-01 12:08 ` Gao Xiang
2018-07-30 2:07 ` [PATCH 2/2] staging: erofs: fix conditional uninitialized `pcn' " Chao Yu
2018-07-30 2:07 ` [PATCH 1/2] staging: erofs: fix compile error without built-in decompression support Chao Yu
2018-07-30 2:32 ` Gao Xiang
2018-07-30 3:07 ` Chao Yu
2018-07-30 3:55 ` Gao Xiang
2018-07-27 0:25 ` [PATCH 00/25] staging: erofs: introduce erofs file system Christian Kujau
2018-07-27 1:39 ` Gao Xiang
2018-07-27 1:56 ` Gao Xiang
2018-07-28 7:25 ` Greg Kroah-Hartman
2018-07-28 9:33 ` Gao Xiang
2018-07-28 10:34 ` Chao Yu
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