From 8f639ddea0c4978ae9b4e46ea041c9e5afe0ee8d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 29 Feb 2012 09:53:55 +0000 Subject: [PATCH] xfs: reimplement fdatasync support Add an in-memory only flag to say we logged timestamps only, and use it to check if fdatasync can optimize away the log force. Reviewed-by: Dave Chinner Signed-off-by: Christoph Hellwig Reviewed-by: Mark Tinguely Signed-off-by: Ben Myers --- fs/xfs/xfs_file.c | 7 +++++-- fs/xfs/xfs_inode_item.c | 3 ++- fs/xfs/xfs_inode_item.h | 11 ++++++++++- fs/xfs/xfs_super.c | 2 +- 4 files changed, 18 insertions(+), 5 deletions(-) diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 78d8b0299592..54a67dd9ac0a 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -197,8 +197,11 @@ xfs_file_fsync( * to flush the log up to the latest LSN that touched the inode. */ xfs_ilock(ip, XFS_ILOCK_SHARED); - if (xfs_ipincount(ip)) - lsn = ip->i_itemp->ili_last_lsn; + if (xfs_ipincount(ip)) { + if (!datasync || + (ip->i_itemp->ili_fields & ~XFS_ILOG_TIMESTAMP)) + lsn = ip->i_itemp->ili_last_lsn; + } xfs_iunlock(ip, XFS_ILOCK_SHARED); if (lsn) diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 8becef4f9e6a..05d924efceaf 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -438,7 +438,8 @@ out: * games in recovery easier, which isn't a big deal as just about any * transaction would dirty it anyway. */ - iip->ili_format.ilf_fields = XFS_ILOG_CORE | iip->ili_fields; + iip->ili_format.ilf_fields = XFS_ILOG_CORE | + (iip->ili_fields & ~XFS_ILOG_TIMESTAMP); iip->ili_format.ilf_size = nvecs; } diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h index bc183d81ad32..41d61c3b7a36 100644 --- a/fs/xfs/xfs_inode_item.h +++ b/fs/xfs/xfs_inode_item.h @@ -86,6 +86,15 @@ typedef struct xfs_inode_log_format_64 { #define XFS_ILOG_AEXT 0x080 /* log i_af.if_extents */ #define XFS_ILOG_ABROOT 0x100 /* log i_af.i_broot */ + +/* + * The timestamps are dirty, but not necessarily anything else in the inode + * core. Unlike the other fields above this one must never make it to disk + * in the ilf_fields of the inode_log_format, but is purely store in-memory in + * ili_fields in the inode_log_item. + */ +#define XFS_ILOG_TIMESTAMP 0x4000 + #define XFS_ILOG_NONCORE (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \ XFS_ILOG_DBROOT | XFS_ILOG_DEV | \ XFS_ILOG_UUID | XFS_ILOG_ADATA | \ @@ -101,7 +110,7 @@ typedef struct xfs_inode_log_format_64 { XFS_ILOG_DEXT | XFS_ILOG_DBROOT | \ XFS_ILOG_DEV | XFS_ILOG_UUID | \ XFS_ILOG_ADATA | XFS_ILOG_AEXT | \ - XFS_ILOG_ABROOT) + XFS_ILOG_ABROOT | XFS_ILOG_TIMESTAMP) static inline int xfs_ilog_fbroot(int w) { diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index e602c8c67c5c..e9ad7894648e 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -907,7 +907,7 @@ xfs_fs_dirty_inode( ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec; xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); - xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); + xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); error = xfs_trans_commit(tp, 0); if (error) goto trouble; -- 2.39.5