From 5bb89b4702e22981445ae01af733a57d1cae2018 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 25 Mar 2015 14:14:42 -0400 Subject: NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS The LAYOUTCOMMIT operation means different things to different layout types. For blocks and objects, it is both a data and metadata consistency operation. For files and flexfiles, it is only a metadata consistency operation. This patch separates out the 2 cases, allowing the files/flexfiles layout drivers to optimise away the data consistency calls to layoutcommit. Signed-off-by: Trond Myklebust --- fs/nfs/pnfs.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'fs/nfs/pnfs.h') diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 66bf5e1..231eb23 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -155,6 +155,8 @@ struct pnfs_layoutdriver_type { int how, struct nfs_commit_info *cinfo); + int (*sync)(struct inode *inode, bool datasync); + /* * Return PNFS_ATTEMPTED to indicate the layout code has attempted * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS @@ -267,6 +269,8 @@ bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); int pnfs_layoutcommit_inode(struct inode *inode, bool sync); +int pnfs_generic_sync(struct inode *inode, bool datasync); +int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); int _pnfs_return_layout(struct inode *); int pnfs_commit_and_return_layout(struct inode *); void pnfs_ld_write_done(struct nfs_pgio_header *); @@ -488,6 +492,14 @@ pnfs_ld_read_whole_page(struct inode *inode) return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; } +static inline int +pnfs_sync_inode(struct inode *inode, bool datasync) +{ + if (!pnfs_enabled_sb(NFS_SERVER(inode))) + return 0; + return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); +} + static inline bool pnfs_layoutcommit_outstanding(struct inode *inode) { @@ -570,6 +582,12 @@ pnfs_ld_read_whole_page(struct inode *inode) return false; } +static inline int +pnfs_sync_inode(struct inode *inode, bool datasync) +{ + return 0; +} + static inline bool pnfs_roc(struct inode *ino) { -- cgit v1.1