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authorJean Noel Cordenner <jean-noel.cordenner@bull.net>2008-01-28 23:58:27 -0500
committerTheodore Ts'o <tytso@mit.edu>2008-01-28 23:58:27 -0500
commit7a224228ed79d587ece2304869000aad1b8e97dd (patch)
treef2b299f5a5d04cf8d3d0ef10ff264bd34943f90e /include/linux/fs.h
parent818d276ceb83aa9fdebb5e0a53188290312de987 (diff)
downloadop-kernel-dev-7a224228ed79d587ece2304869000aad1b8e97dd.zip
op-kernel-dev-7a224228ed79d587ece2304869000aad1b8e97dd.tar.gz
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 <cmm@us.ibm.com> Signed-off-by: Jean Noel Cordenner <jean-noel.cordenner@bull.net> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 21398a5..9608839 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)
{
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