Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030530AbXAHETW (ORCPT ); Sun, 7 Jan 2007 23:19:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030519AbXAHESs (ORCPT ); Sun, 7 Jan 2007 23:18:48 -0500 Received: from filer.fsl.cs.sunysb.edu ([130.245.126.2]:50384 "EHLO filer.fsl.cs.sunysb.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030505AbXAHER6 (ORCPT ); Sun, 7 Jan 2007 23:17:58 -0500 From: "Josef 'Jeff' Sipek" To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org, viro@ftp.linux.org.uk, torvalds@osdl.org, akpm@osdl.org, mhalcrow@us.ibm.com, Josef "Jeff" Sipek , David Quigley , Erez Zadok Subject: [PATCH 19/24] Unionfs: Helper macros/inlines Date: Sun, 7 Jan 2007 23:13:11 -0500 Message-Id: <11682295994056-git-send-email-jsipek@cs.sunysb.edu> X-Mailer: git-send-email 1.4.4.2 In-Reply-To: <1168229596580-git-send-email-jsipek@cs.sunysb.edu> References: <1168229596580-git-send-email-jsipek@cs.sunysb.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6251 Lines: 202 From: Josef "Jeff" Sipek This patch contains many macros and inline functions used thoughout Unionfs. Signed-off-by: Josef "Jeff" Sipek Signed-off-by: David Quigley Signed-off-by: Erez Zadok --- fs/unionfs/fanout.h | 177 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 177 insertions(+), 0 deletions(-) diff --git a/fs/unionfs/fanout.h b/fs/unionfs/fanout.h new file mode 100644 index 0000000..ab3bf2c --- /dev/null +++ b/fs/unionfs/fanout.h @@ -0,0 +1,177 @@ +/* + * Copyright (c) 2003-2006 Erez Zadok + * Copyright (c) 2003-2006 Charles P. Wright + * Copyright (c) 2005-2006 Josef Sipek + * Copyright (c) 2005 Arun M. Krishnakumar + * Copyright (c) 2004-2006 David P. Quigley + * Copyright (c) 2003-2004 Mohammad Nayyer Zubair + * Copyright (c) 2003 Puja Gupta + * Copyright (c) 2003 Harikesavan Krishnan + * Copyright (c) 2003-2006 Stony Brook University + * Copyright (c) 2003-2006 The Research Foundation of State University of New York + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _FANOUT_H_ +#define _FANOUT_H_ + +/* Inode to private data */ +static inline struct unionfs_inode_info *UNIONFS_I(const struct inode *inode) +{ + return container_of(inode, struct unionfs_inode_info, vfs_inode); +} + +#define ibstart(ino) (UNIONFS_I(ino)->bstart) +#define ibend(ino) (UNIONFS_I(ino)->bend) + +/* Superblock to private data */ +#define UNIONFS_SB(super) ((struct unionfs_sb_info *)(super)->s_fs_info) +#define sbstart(sb) 0 +#define sbend(sb) (UNIONFS_SB(sb)->bend) +#define sbmax(sb) (UNIONFS_SB(sb)->bend + 1) + +/* File to private Data */ +#define UNIONFS_F(file) ((struct unionfs_file_info *)((file)->private_data)) +#define fbstart(file) (UNIONFS_F(file)->bstart) +#define fbend(file) (UNIONFS_F(file)->bend) + +/* File to lower file. */ +static inline struct file *unionfs_lower_file(const struct file *f) +{ + return UNIONFS_F(f)->lower_files[fbstart(f)]; +} + +static inline struct file *unionfs_lower_file_idx(const struct file *f, int index) +{ + return UNIONFS_F(f)->lower_files[index]; +} + +static inline void unionfs_set_lower_file_idx(struct file *f, int index, struct file *val) +{ + UNIONFS_F(f)->lower_files[index] = val; +} + +static inline void unionfs_set_lower_file(struct file *f, struct file *val) +{ + UNIONFS_F(f)->lower_files[fbstart(f)] = val; +} + +/* Inode to lower inode. */ +static inline struct inode *unionfs_lower_inode(const struct inode *i) +{ + return UNIONFS_I(i)->lower_inodes[ibstart(i)]; +} + +static inline struct inode *unionfs_lower_inode_idx(const struct inode *i, int index) +{ + return UNIONFS_I(i)->lower_inodes[index]; +} + +static inline void unionfs_set_lower_inode_idx(struct inode *i, int index, + struct inode *val) +{ + UNIONFS_I(i)->lower_inodes[index] = val; +} + +static inline void unionfs_set_lower_inode(struct inode *i, struct inode *val) +{ + UNIONFS_I(i)->lower_inodes[ibstart(i)] = val; +} + +/* Superblock to lower superblock. */ +static inline struct super_block *unionfs_lower_super(const struct super_block *sb) +{ + return UNIONFS_SB(sb)->data[sbstart(sb)].sb; +} + +static inline struct super_block *unionfs_lower_super_idx(const struct super_block *sb, int index) +{ + return UNIONFS_SB(sb)->data[index].sb; +} + +static inline void unionfs_set_lower_super_idx(struct super_block *sb, int index, + struct super_block *val) +{ + UNIONFS_SB(sb)->data[index].sb = val; +} + +static inline void unionfs_set_lower_super(struct super_block *sb, struct super_block *val) +{ + UNIONFS_SB(sb)->data[sbstart(sb)].sb = val; +} + +/* Branch count macros. */ +static inline int branch_count(const struct super_block *sb, int index) +{ + return atomic_read(&UNIONFS_SB(sb)->data[index].sbcount); +} + +static inline void set_branch_count(struct super_block *sb, int index, int val) +{ + atomic_set(&UNIONFS_SB(sb)->data[index].sbcount, val); +} + +static inline void branchget(struct super_block *sb, int index) +{ + atomic_inc(&UNIONFS_SB(sb)->data[index].sbcount); +} + +static inline void branchput(struct super_block *sb, int index) +{ + atomic_dec(&UNIONFS_SB(sb)->data[index].sbcount); +} + +/* Dentry macros */ +static inline struct unionfs_dentry_info *UNIONFS_D(const struct dentry *dent) +{ + return dent->d_fsdata; +} + +#define dbstart(dent) (UNIONFS_D(dent)->bstart) +#define set_dbstart(dent, val) do { UNIONFS_D(dent)->bstart = val; } while(0) +#define dbend(dent) (UNIONFS_D(dent)->bend) +#define set_dbend(dent, val) do { UNIONFS_D(dent)->bend = val; } while(0) +#define dbopaque(dent) (UNIONFS_D(dent)->bopaque) +#define set_dbopaque(dent, val) do { UNIONFS_D(dent)->bopaque = val; } while (0) + +static inline void unionfs_set_lower_dentry_idx(struct dentry *dent, int index, + struct dentry *val) +{ + UNIONFS_D(dent)->lower_paths[index].dentry = val; +} + +static inline struct dentry *unionfs_lower_dentry_idx(const struct dentry *dent, int index) +{ + return UNIONFS_D(dent)->lower_paths[index].dentry; +} + +static inline struct dentry *unionfs_lower_dentry(const struct dentry *dent) +{ + return unionfs_lower_dentry_idx(dent, dbstart(dent)); +} + +static inline void unionfs_set_lower_mnt_idx(struct dentry *dent, int index, + struct vfsmount *mnt) +{ + UNIONFS_D(dent)->lower_paths[index].mnt = mnt; +} + +static inline struct vfsmount *unionfs_lower_mnt_idx(const struct dentry *dent, int index) +{ + return UNIONFS_D(dent)->lower_paths[index].mnt; +} + +static inline struct vfsmount *unionfs_lower_mnt(const struct dentry *dent) +{ + return unionfs_lower_mnt_idx(dent,dbstart(dent)); +} + +/* Macros for locking a dentry. */ +#define lock_dentry(d) down(&UNIONFS_D(d)->sem) +#define unlock_dentry(d) up(&UNIONFS_D(d)->sem) +#define verify_locked(d) + +#endif /* _FANOUT_H */ -- 1.4.4.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/