Return-Path: Received: from int-mailstore01.merit.edu ([207.75.116.232]:60646 "EHLO int-mailstore01.merit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754543Ab1FLXoL (ORCPT ); Sun, 12 Jun 2011 19:44:11 -0400 Message-Id: <0e7ea300edf2d551e0ee8682d9f7fd47c08ac630.1307921138.git.rees@umich.edu> In-Reply-To: References: Date: Sun, 12 Jun 2011 19:44:08 -0400 Subject: [PATCH 09/34] pnfsblock: layout alloc and free From: Jim Rees To: linux-nfs@vger.kernel.org Cc: peter honeyman Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 From: Fred Isaman Allocate the empty list-heads that will hold all the extent data for the layout. Signed-off-by: Fred Isaman [pnfs: move pnfs_layout_type inline in nfs_inode] Signed-off-by: Benny Halevy --- fs/nfs/blocklayout/blocklayout.c | 39 +++++++++++++++- fs/nfs/blocklayout/blocklayout.h | 91 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 128 insertions(+), 2 deletions(-) create mode 100644 fs/nfs/blocklayout/blocklayout.h diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c index 2e0d41a..8218d54 100644 --- a/fs/nfs/blocklayout/blocklayout.c +++ b/fs/nfs/blocklayout/blocklayout.c @@ -32,7 +32,7 @@ #include #include -#include "../pnfs.h" +#include "blocklayout.h" #define NFSDBG_FACILITY NFSDBG_PNFS_LD @@ -53,15 +53,50 @@ bl_write_pagelist(struct nfs_write_data *wdata, return PNFS_NOT_ATTEMPTED; } +/* STUB */ +static void +release_extents(struct pnfs_block_layout *bl, + struct pnfs_layout_range *range) +{ + return; +} + +/* STUB */ +static void +release_inval_marks(struct pnfs_inval_markings *marks) +{ + return; +} + static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo) { + struct pnfs_block_layout *bl = BLK_LO2EXT(lo); + + dprintk("%s enter\n", __func__); + release_extents(bl, NULL); + release_inval_marks(&bl->bl_inval); + kfree(bl); } static struct pnfs_layout_hdr * bl_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags) { - return NULL; + struct pnfs_block_layout *bl; + + dprintk("%s enter\n", __func__); + bl = kzalloc(sizeof(*bl), gfp_flags); + if (!bl) + return NULL; + spin_lock_init(&bl->bl_ext_lock); + INIT_LIST_HEAD(&bl->bl_extents[0]); + INIT_LIST_HEAD(&bl->bl_extents[1]); + INIT_LIST_HEAD(&bl->bl_commit); + INIT_LIST_HEAD(&bl->bl_committing); + bl->bl_count = 0; + bl->bl_blocksize = NFS_SERVER(inode)->pnfs_blksize >> 9; + INIT_INVAL_MARKS(&bl->bl_inval, bl->bl_blocksize); + return &bl->bl_layout; } static void diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h new file mode 100644 index 0000000..8ea82b8 --- /dev/null +++ b/fs/nfs/blocklayout/blocklayout.h @@ -0,0 +1,91 @@ +/* + * linux/fs/nfs/blocklayout/blocklayout.h + * + * Module for the NFSv4.1 pNFS block layout driver. + * + * Copyright (c) 2006 The Regents of the University of Michigan. + * All rights reserved. + * + * Andy Adamson + * Fred Isaman + * + * permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any purpose, + * so long as the name of the university of michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. if + * the above copyright notice or any other identification of the + * university of michigan is included in any copy of any portion of + * this software, then the disclaimer below must also be included. + * + * this software is provided as is, without representation from the + * university of michigan as to its fitness for any purpose, and without + * warranty by the university of michigan of any kind, either express + * or implied, including without limitation the implied warranties of + * merchantability and fitness for a particular purpose. the regents + * of the university of michigan shall not be liable for any damages, + * including special, indirect, incidental, or consequential damages, + * with respect to any claim arising out or in connection with the use + * of the software, even if it has been or is hereafter advised of the + * possibility of such damages. + */ +#ifndef FS_NFS_NFS4BLOCKLAYOUT_H +#define FS_NFS_NFS4BLOCKLAYOUT_H + +#include +#include "../pnfs.h" + +enum exstate4 { + PNFS_BLOCK_READWRITE_DATA = 0, + PNFS_BLOCK_READ_DATA = 1, + PNFS_BLOCK_INVALID_DATA = 2, /* mapped, but data is invalid */ + PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */ +}; + +struct pnfs_inval_markings { + /* STUB */ +}; + +/* sector_t fields are all in 512-byte sectors */ +struct pnfs_block_extent { + struct kref be_refcnt; + struct list_head be_node; /* link into lseg list */ + struct nfs4_deviceid be_devid; /* STUB - remevable??? */ + struct block_device *be_mdev; + sector_t be_f_offset; /* the starting offset in the file */ + sector_t be_length; /* the size of the extent */ + sector_t be_v_offset; /* the starting offset in the volume */ + enum exstate4 be_state; /* the state of this extent */ + struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */ +}; + +static inline void +INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize) +{ + /* STUB */ +} + +enum extentclass4 { + RW_EXTENT = 0, /* READWRTE and INVAL */ + RO_EXTENT = 1, /* READ and NONE */ + EXTENT_LISTS = 2, +}; + +struct pnfs_block_layout { + struct pnfs_layout_hdr bl_layout; + struct pnfs_inval_markings bl_inval; /* tracks INVAL->RW transition */ + spinlock_t bl_ext_lock; /* Protects list manipulation */ + struct list_head bl_extents[EXTENT_LISTS]; /* R and RW extents */ + struct list_head bl_commit; /* Needs layout commit */ + struct list_head bl_committing; /* Layout committing */ + unsigned int bl_count; /* entries in bl_commit */ + sector_t bl_blocksize; /* Server blocksize in sectors */ +}; + +static inline struct pnfs_block_layout * +BLK_LO2EXT(struct pnfs_layout_hdr *lo) +{ + return container_of(lo, struct pnfs_block_layout, bl_layout); +} + +#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */ -- 1.7.4.1