All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jeffle Xu <jefflexu@linux.alibaba.com>
To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org,
	chao@kernel.org, linux-erofs@lists.ozlabs.org
Cc: linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com,
	bo.liu@linux.alibaba.com, tao.peng@linux.alibaba.com,
	gerry@linux.alibaba.com, eguan@linux.alibaba.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH v1 10/23] erofs: add anonymous inode managing page cache of blob file
Date: Mon, 27 Dec 2021 20:54:31 +0800	[thread overview]
Message-ID: <20211227125444.21187-11-jefflexu@linux.alibaba.com> (raw)
In-Reply-To: <20211227125444.21187-1-jefflexu@linux.alibaba.com>

Introduce one anonymous inode for managing page cache of corresponding
blob file. Then erofs could read directly from the address space of the
anonymous inode when cache hit.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
 fs/erofs/fscache.c  | 35 +++++++++++++++++++++++++++++++++++
 fs/erofs/internal.h |  1 +
 2 files changed, 36 insertions(+)

diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
index 15c5bb0f8ea5..4dfca7c95710 100644
--- a/fs/erofs/fscache.c
+++ b/fs/erofs/fscache.c
@@ -34,6 +34,33 @@ static void erofs_fscache_cleanup_cookie(struct erofs_cookie_ctx *ctx)
 	ctx->cookie = NULL;
 }
 
+static const struct address_space_operations erofs_fscache_aops = {
+};
+
+static int erofs_fscache_get_inode(struct erofs_cookie_ctx *ctx,
+				   struct super_block *sb)
+{
+	struct inode *const inode = new_inode(sb);
+
+	if (!inode)
+		return -ENOMEM;
+
+	set_nlink(inode, 1);
+	inode->i_size = OFFSET_MAX;
+
+	inode->i_mapping->a_ops = &erofs_fscache_aops;
+	mapping_set_gfp_mask(inode->i_mapping,
+			GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);
+	ctx->inode = inode;
+	return 0;
+}
+
+static void erofs_fscache_put_inode(struct erofs_cookie_ctx *ctx)
+{
+	iput(ctx->inode);
+	ctx->inode = NULL;
+}
+
 static int erofs_fscahce_init_ctx(struct erofs_cookie_ctx *ctx,
 				  struct super_block *sb, char *path)
 {
@@ -45,12 +72,20 @@ static int erofs_fscahce_init_ctx(struct erofs_cookie_ctx *ctx,
 		return ret;
 	}
 
+	ret = erofs_fscache_get_inode(ctx, sb);
+	if (ret) {
+		erofs_err(sb, "failed to get anonymous inode\n");
+		erofs_fscache_cleanup_cookie(ctx);
+		return ret;
+	}
+
 	return 0;
 }
 
 static void erofs_fscache_cleanup_ctx(struct erofs_cookie_ctx *ctx)
 {
 	erofs_fscache_cleanup_cookie(ctx);
+	erofs_fscache_put_inode(ctx);
 }
 
 struct erofs_cookie_ctx *erofs_fscache_get_ctx(struct super_block *sb,
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 4179c3dcb7f9..2e4f267b37e7 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -93,6 +93,7 @@ struct erofs_sb_lz4_info {
 
 struct erofs_cookie_ctx {
 	struct fscache_cookie *cookie;
+	struct inode *inode;
 };
 
 struct erofs_sb_info {
-- 
2.27.0


WARNING: multiple messages have this Message-ID (diff)
From: Jeffle Xu <jefflexu@linux.alibaba.com>
To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org,
	chao@kernel.org, linux-erofs@lists.ozlabs.org
Cc: tao.peng@linux.alibaba.com, linux-kernel@vger.kernel.org,
	joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com,
	linux-fsdevel@vger.kernel.org, eguan@linux.alibaba.com,
	gerry@linux.alibaba.com
Subject: [PATCH v1 10/23] erofs: add anonymous inode managing page cache of blob file
Date: Mon, 27 Dec 2021 20:54:31 +0800	[thread overview]
Message-ID: <20211227125444.21187-11-jefflexu@linux.alibaba.com> (raw)
In-Reply-To: <20211227125444.21187-1-jefflexu@linux.alibaba.com>

Introduce one anonymous inode for managing page cache of corresponding
blob file. Then erofs could read directly from the address space of the
anonymous inode when cache hit.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
 fs/erofs/fscache.c  | 35 +++++++++++++++++++++++++++++++++++
 fs/erofs/internal.h |  1 +
 2 files changed, 36 insertions(+)

diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
index 15c5bb0f8ea5..4dfca7c95710 100644
--- a/fs/erofs/fscache.c
+++ b/fs/erofs/fscache.c
@@ -34,6 +34,33 @@ static void erofs_fscache_cleanup_cookie(struct erofs_cookie_ctx *ctx)
 	ctx->cookie = NULL;
 }
 
+static const struct address_space_operations erofs_fscache_aops = {
+};
+
+static int erofs_fscache_get_inode(struct erofs_cookie_ctx *ctx,
+				   struct super_block *sb)
+{
+	struct inode *const inode = new_inode(sb);
+
+	if (!inode)
+		return -ENOMEM;
+
+	set_nlink(inode, 1);
+	inode->i_size = OFFSET_MAX;
+
+	inode->i_mapping->a_ops = &erofs_fscache_aops;
+	mapping_set_gfp_mask(inode->i_mapping,
+			GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);
+	ctx->inode = inode;
+	return 0;
+}
+
+static void erofs_fscache_put_inode(struct erofs_cookie_ctx *ctx)
+{
+	iput(ctx->inode);
+	ctx->inode = NULL;
+}
+
 static int erofs_fscahce_init_ctx(struct erofs_cookie_ctx *ctx,
 				  struct super_block *sb, char *path)
 {
@@ -45,12 +72,20 @@ static int erofs_fscahce_init_ctx(struct erofs_cookie_ctx *ctx,
 		return ret;
 	}
 
+	ret = erofs_fscache_get_inode(ctx, sb);
+	if (ret) {
+		erofs_err(sb, "failed to get anonymous inode\n");
+		erofs_fscache_cleanup_cookie(ctx);
+		return ret;
+	}
+
 	return 0;
 }
 
 static void erofs_fscache_cleanup_ctx(struct erofs_cookie_ctx *ctx)
 {
 	erofs_fscache_cleanup_cookie(ctx);
+	erofs_fscache_put_inode(ctx);
 }
 
 struct erofs_cookie_ctx *erofs_fscache_get_ctx(struct super_block *sb,
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 4179c3dcb7f9..2e4f267b37e7 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -93,6 +93,7 @@ struct erofs_sb_lz4_info {
 
 struct erofs_cookie_ctx {
 	struct fscache_cookie *cookie;
+	struct inode *inode;
 };
 
 struct erofs_sb_info {
-- 
2.27.0


  parent reply	other threads:[~2021-12-27 12:56 UTC|newest]

Thread overview: 90+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-27 12:54 [PATCH v1 00/23] fscache,erofs: fscache-based demand-read semantics Jeffle Xu
2021-12-27 12:54 ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 01/23] cachefiles: add cachefiles_demand devnode Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-28  2:47   ` Joseph Qi
2021-12-28  2:47     ` Joseph Qi
2021-12-28 12:34     ` JeffleXu
2021-12-28 12:34       ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 02/23] cachefiles: add mode command to distinguish modes Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 03/23] cachefiles: detect backing file size in demand-read mode Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 04/23] netfs: make ops->init_rreq() optional Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 05/23] netfs: add inode parameter to netfs_alloc_read_request() Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2022-01-04 14:00   ` Gao Xiang
2022-01-04 14:00     ` Gao Xiang
2022-01-13  3:10   ` [Linux-cachefs] " JeffleXu
2022-01-13  3:10     ` JeffleXu
2022-01-13 12:09     ` Gao Xiang
2022-01-13 12:09       ` Gao Xiang
2021-12-27 12:54 ` [PATCH v1 06/23] erofs: export erofs_map_blocks() Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 07/23] erofs: add nodev mode Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2022-01-04 14:33   ` Gao Xiang
2022-01-04 14:33     ` Gao Xiang
2022-01-04 14:58     ` Gao Xiang
2022-01-04 14:58       ` Gao Xiang
2022-01-05  9:04       ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 08/23] erofs: register global fscache volume Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 09/23] erofs: add cookie context helper functions Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` Jeffle Xu [this message]
2021-12-27 12:54   ` [PATCH v1 10/23] erofs: add anonymous inode managing page cache of blob file Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 11/23] erofs: register cookie context for bootstrap Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 12/23] erofs: implement fscache-based metadata read Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 17:07   ` kernel test robot
2021-12-27 17:07     ` kernel test robot
2021-12-27 17:07     ` kernel test robot
2021-12-27 17:17   ` kernel test robot
2021-12-27 17:17     ` kernel test robot
2021-12-27 17:17     ` kernel test robot
2021-12-27 12:54 ` [PATCH v1 13/23] erofs: implement fscache-based data read Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2022-01-03  6:32   ` JeffleXu
2022-01-03  6:32     ` JeffleXu
2022-01-04 14:40   ` Gao Xiang
2022-01-04 14:40     ` Gao Xiang
2022-01-05  2:29     ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 14/23] erofs: register cookie context for data blobs Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 15/23] erofs: implement fscache-based data read " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 16/23] erofs: add 'uuid' mount option Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 17/23] netfs: support on demand read Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 18/23] cachefiles: use idr tree managing pending " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 19/23] cachefiles: implement .demand_read() for " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 15:32   ` kernel test robot
2021-12-27 15:32     ` kernel test robot
2021-12-27 15:32     ` kernel test robot
2021-12-27 15:36   ` Matthew Wilcox
2021-12-27 15:36     ` Matthew Wilcox
2021-12-28 12:33     ` JeffleXu
2021-12-28 12:33       ` JeffleXu
2022-01-12  9:02       ` JeffleXu
2022-01-12  9:02         ` JeffleXu
2022-01-19 13:20         ` Matthew Wilcox
2022-01-19 13:20           ` Matthew Wilcox
2022-01-20 12:43           ` JeffleXu
2022-01-20 12:43             ` JeffleXu
2021-12-27 15:55   ` kernel test robot
2021-12-27 15:55     ` kernel test robot
2021-12-27 15:55     ` kernel test robot
2021-12-27 12:54 ` [PATCH v1 20/23] cachefiles: implement .poll() " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 21/23] cachefiles: implement .read() " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 22/23] cachefiles: add done command " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 23/23] erofs: support on " Jeffle Xu
2021-12-27 12:54   ` Jeffle Xu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20211227125444.21187-11-jefflexu@linux.alibaba.com \
    --to=jefflexu@linux.alibaba.com \
    --cc=bo.liu@linux.alibaba.com \
    --cc=chao@kernel.org \
    --cc=dhowells@redhat.com \
    --cc=eguan@linux.alibaba.com \
    --cc=gerry@linux.alibaba.com \
    --cc=joseph.qi@linux.alibaba.com \
    --cc=linux-cachefs@redhat.com \
    --cc=linux-erofs@lists.ozlabs.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tao.peng@linux.alibaba.com \
    --cc=xiang@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.