From f057f6cdf64175db1151b1f5d110e29904f119a1 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Mon, 12 Jan 2009 10:43:39 +0000 Subject: GFS2: Merge lock_dlm module into GFS2 This is the big patch that I've been working on for some time now. There are many reasons for wanting to make this change such as: o Reducing overhead by eliminating duplicated fields between structures o Simplifcation of the code (reduces the code size by a fair bit) o The locking interface is now the DLM interface itself as proposed some time ago. o Fewer lookups of glocks when processing replies from the DLM o Fewer memory allocations/deallocations for each glock o Scope to do further optimisations in the future (but this patch is more than big enough for now!) Please note that (a) this patch relates to the lock_dlm module and not the DLM itself, that is still a separate module; and (b) that we retain the ability to build GFS2 as a standalone single node filesystem with out requiring the DLM. This patch needs a lot of testing, hence my keeping it I restarted my -git tree after the last merge window. That way, this has the maximum exposure before its merged. This is (modulo a few minor bug fixes) the same patch that I've been posting on and off the the last three months and its passed a number of different tests so far. Signed-off-by: Steven Whitehouse --- fs/gfs2/inode.h | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) (limited to 'fs/gfs2/inode.h') diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h index d5329364cdff..dca4fee3078b 100644 --- a/fs/gfs2/inode.h +++ b/fs/gfs2/inode.h @@ -101,12 +101,26 @@ void gfs2_dinode_print(const struct gfs2_inode *ip); extern const struct inode_operations gfs2_file_iops; extern const struct inode_operations gfs2_dir_iops; extern const struct inode_operations gfs2_symlink_iops; -extern const struct file_operations gfs2_file_fops; -extern const struct file_operations gfs2_dir_fops; -extern const struct file_operations gfs2_file_fops_nolock; -extern const struct file_operations gfs2_dir_fops_nolock; +extern const struct file_operations *gfs2_file_fops_nolock; +extern const struct file_operations *gfs2_dir_fops_nolock; extern void gfs2_set_inode_flags(struct inode *inode); + +#ifdef CONFIG_GFS2_FS_LOCKING_DLM +extern const struct file_operations *gfs2_file_fops; +extern const struct file_operations *gfs2_dir_fops; +static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) +{ + return sdp->sd_args.ar_localflocks; +} +#else /* Single node only */ +#define gfs2_file_fops NULL +#define gfs2_dir_fops NULL +static inline int gfs2_localflocks(const struct gfs2_sbd *sdp) +{ + return 1; +} +#endif /* CONFIG_GFS2_FS_LOCKING_DLM */ #endif /* __INODE_DOT_H__ */ -- cgit v1.2.3-59-g8ed1b