From 7a224228ed79d587ece2304869000aad1b8e97dd Mon Sep 17 00:00:00 2001 From: Jean Noel Cordenner Date: Mon, 28 Jan 2008 23:58:27 -0500 Subject: vfs: Add 64 bit i_version support The i_version field of the inode is changed to be a 64-bit counter that is set on every inode creation and that is incremented every time the inode data is modified (similarly to the "ctime" time-stamp). The aim is to fulfill a NFSv4 requirement for rfc3530. This first part concerns the vfs, it converts the 32-bit i_version in the generic inode to a 64-bit, a flag is added in the super block in order to check if the feature is enabled and the i_version is incremented in the vfs. Signed-off-by: Mingming Cao Signed-off-by: Jean Noel Cordenner Signed-off-by: Kalpak Shah --- include/linux/fs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/fs.h b/include/linux/fs.h index 21398a5d688..9608839552b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -124,6 +124,7 @@ extern int dir_notify_enable; #define MS_SHARED (1<<20) /* change to shared */ #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ +#define MS_I_VERSION (1<<23) /* Update inode I_version field */ #define MS_ACTIVE (1<<30) #define MS_NOUSER (1<<31) @@ -173,6 +174,7 @@ extern int dir_notify_enable; ((inode)->i_flags & (S_SYNC|S_DIRSYNC))) #define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK) #define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME) +#define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION) #define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA) #define IS_APPEND(inode) ((inode)->i_flags & S_APPEND) @@ -599,7 +601,7 @@ struct inode { uid_t i_uid; gid_t i_gid; dev_t i_rdev; - unsigned long i_version; + u64 i_version; loff_t i_size; #ifdef __NEED_I_SIZE_ORDERED seqcount_t i_size_seqcount; @@ -1394,6 +1396,7 @@ static inline void inode_dec_link_count(struct inode *inode) mark_inode_dirty(inode); } +extern void inode_inc_iversion(struct inode *inode); extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry); static inline void file_accessed(struct file *file) { -- cgit v1.2.3-70-g09d2