From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 1/2] f2fs: detect host-managed SMR by feature flag Date: Tue, 14 Jun 2016 11:43:21 -0700 Message-ID: <20160614184322.88117-1-jaegeuk@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1bCtJO-0003m4-Sa for linux-f2fs-devel@lists.sourceforge.net; Tue, 14 Jun 2016 18:43:42 +0000 Received: from mail.kernel.org ([198.145.29.136]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1bCtJN-0004jQ-Un for linux-f2fs-devel@lists.sourceforge.net; Tue, 14 Jun 2016 18:43:42 +0000 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim If mkfs.f2fs gives a feature flag for host-managed SMR, we can set mode=lfs by default. Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 21 +++++++++++++++++++++ fs/f2fs/super.c | 14 ++++++++------ 2 files changed, 29 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 32be19e..1a19c02 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -133,6 +133,7 @@ struct f2fs_mount_info { }; #define F2FS_FEATURE_ENCRYPT 0x0001 +#define F2FS_FEATURE_HMSMR 0x0002 #define F2FS_HAS_FEATURE(sb, mask) \ ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0) @@ -2354,6 +2355,26 @@ static inline int f2fs_sb_has_crypto(struct super_block *sb) return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_ENCRYPT); } +static inline int f2fs_sb_mounted_hmsmr(struct super_block *sb) +{ + return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_HMSMR); +} + +static inline void set_opt_mode(struct f2fs_sb_info *sbi, unsigned int mt) +{ + clear_opt(sbi, ADAPTIVE); + clear_opt(sbi, LFS); + + switch (mt) { + case F2FS_MOUNT_ADAPTIVE: + set_opt(sbi, ADAPTIVE); + break; + case F2FS_MOUNT_LFS: + set_opt(sbi, LFS); + break; + } +} + static inline bool f2fs_may_encrypt(struct inode *inode) { #ifdef CONFIG_F2FS_FS_ENCRYPTION diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index edc736d..71b6066 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -515,12 +515,10 @@ static int parse_options(struct super_block *sb, char *options) return -ENOMEM; if (strlen(name) == 8 && !strncmp(name, "adaptive", 8)) { - set_opt(sbi, ADAPTIVE); - clear_opt(sbi, LFS); + set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE); } else if (strlen(name) == 3 && !strncmp(name, "lfs", 3)) { - clear_opt(sbi, ADAPTIVE); - set_opt(sbi, LFS); + set_opt_mode(sbi, F2FS_MOUNT_LFS); } else { kfree(name); return -EINVAL; @@ -980,7 +978,10 @@ static void default_options(struct f2fs_sb_info *sbi) set_opt(sbi, EXTENT_CACHE); sbi->sb->s_flags |= MS_LAZYTIME; set_opt(sbi, FLUSH_MERGE); - set_opt(sbi, ADAPTIVE); + if (f2fs_sb_mounted_hmsmr(sbi->sb)) + set_opt_mode(sbi, F2FS_MOUNT_LFS); + else + set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE); #ifdef CONFIG_F2FS_FS_XATTR set_opt(sbi, XATTR_USER); @@ -1629,6 +1630,8 @@ try_onemore: goto free_sbi; sb->s_fs_info = sbi; + sbi->raw_super = raw_super; + default_options(sbi); /* parse mount options */ options = kstrdup((const char *)data, GFP_KERNEL); @@ -1658,7 +1661,6 @@ try_onemore: memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid)); /* init f2fs-specific super block info */ - sbi->raw_super = raw_super; sbi->valid_super_block = valid_super_block; mutex_init(&sbi->gc_mutex); mutex_init(&sbi->cp_mutex); -- 2.8.3 ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. http://pubads.g.doubleclick.net/gampad/clk?id=1444514421&iu=/41014381