linux-kernel - [RFC PATCH v6 3/7] erofs: support domain-specific page cache share

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250301145002.2420830-4-hongzhen@linux.alibaba.com>
Date: Sat,  1 Mar 2025 22:49:40 +0800
From: Hongzhen Luo <hongzhen@...ux.alibaba.com>
To: linux-erofs@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org,
	Hongzhen Luo <hongzhen@...ux.alibaba.com>
Subject: [RFC PATCH v6 3/7] erofs: support domain-specific page cache share

Only files in the same domain will share the page cache. Also modify
the sysfs related content in preparation for the upcoming page cache
share feature.

Signed-off-by: Hongzhen Luo <hongzhen@...ux.alibaba.com>
---
 fs/erofs/super.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 6af02cc8b8c6..ceab0c29b061 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -489,6 +489,8 @@ static int erofs_fc_parse_param(struct fs_context *fc,
 		if (!sbi->fsid)
 			return -ENOMEM;
 		break;
+#endif
+#if defined(CONFIG_EROFS_FS_ONDEMAND) || defined(CONFIG_EROFS_FS_INODE_SHARE)
 	case Opt_domain_id:
 		kfree(sbi->domain_id);
 		sbi->domain_id = kstrdup(param->string, GFP_KERNEL);
@@ -558,16 +560,16 @@ static void erofs_set_sysfs_name(struct super_block *sb)
 {
 	struct erofs_sb_info *sbi = EROFS_SB(sb);
 
-	if (sbi->domain_id)
+	if (sbi->domain_id && !sbi->ishare_key)
 		super_set_sysfs_name_generic(sb, "%s,%s", sbi->domain_id,
 					     sbi->fsid);
 	else if (sbi->fsid)
 		super_set_sysfs_name_generic(sb, "%s", sbi->fsid);
-	else if (erofs_is_fileio_mode(sbi))
+	else if (!sb->s_bdi || !sb->s_bdi->dev)
+		super_set_sysfs_name_id(sb);
+	else
 		super_set_sysfs_name_generic(sb, "%s",
 					     bdi_dev_name(sb->s_bdi));
-	else
-		super_set_sysfs_name_id(sb);
 }
 
 static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)
@@ -965,6 +967,8 @@ static int erofs_show_options(struct seq_file *seq, struct dentry *root)
 #ifdef CONFIG_EROFS_FS_ONDEMAND
 	if (sbi->fsid)
 		seq_printf(seq, ",fsid=%s", sbi->fsid);
+#endif
+#if defined(CONFIG_EROFS_FS_ONDEMAND) || defined(CONFIG_EROFS_FS_INODE_SHARE)
 	if (sbi->domain_id)
 		seq_printf(seq, ",domain_id=%s", sbi->domain_id);
 #endif
-- 
2.43.5