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
| ||
|
Message-Id: <1359609477-29845-4-git-send-email-wenqing.lz@taobao.com> Date: Thu, 31 Jan 2013 13:17:51 +0800 From: Zheng Liu <gnehzuil.liu@...il.com> To: linux-ext4@...r.kernel.org Cc: Zheng Liu <wenqing.lz@...bao.com>, "Theodore Ts'o" <tytso@....edu> Subject: [PATCH 3/9 v4] ext4: add physical block and status member into extent status tree From: Zheng Liu <wenqing.lz@...bao.com> es_pblk is used to record physical block that maps to the disk. es_status is used to record the status of the extent. Three status are defined, which are written, unwritten and delayed. Signed-off-by: Zheng Liu <wenqing.lz@...bao.com> Cc: "Theodore Ts'o" <tytso@....edu> --- fs/ext4/extents_status.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index 81e9339..2eb9cc3 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -20,10 +20,22 @@ #define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif +enum { + EXTENT_STATUS_WRITTEN = 0, /* written extent */ + EXTENT_STATUS_UNWRITTEN = 1, /* unwritten extent */ + EXTENT_STATUS_DELAYED = 2, /* delayed extent */ +}; + +/* + * Here for save memory es_status is stashed into es_pblk because we only have + * 48 bits physical block and es_status only needs 2 bits. + */ struct extent_status { struct rb_node rb_node; - ext4_lblk_t es_lblk; /* first logical block extent covers */ - ext4_lblk_t es_len; /* length of extent in block */ + ext4_lblk_t es_lblk; /* first logical block extent covers */ + ext4_lblk_t es_len; /* length of extent in block */ + ext4_fsblk_t es_pblk : 62; /* first physical block */ + ext4_fsblk_t es_status : 2; /* record the status of extent */ }; struct ext4_es_tree { -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists