[CIFS] mtime bounces from local to remote when cifs nocmtime i_flags overwritten

atime flag was also overwritten. Noticed by Shirish when he was debugging
an atime problem.  Should help performance a bit too.

cifs should be getting time stamps from the server (that was the original
intent too)

Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e8287c4..887c89b 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -91,8 +91,9 @@ cifs_read_super(struct super_block *sb, void *data,
        struct inode *inode;
        struct cifs_sb_info *cifs_sb;
        int rc = 0;
-
-       sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */
+       
+       /* BB should we make this contingent on mount parm? */
+       sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
        sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info),GFP_KERNEL);
        cifs_sb = CIFS_SB(sb);
        if(cifs_sb == NULL)
@@ -258,7 +259,10 @@ cifs_alloc_inode(struct super_block *sb)
        cifs_inode->clientCanCacheRead = FALSE;
        cifs_inode->clientCanCacheAll = FALSE;
        cifs_inode->vfs_inode.i_blkbits = 14;  /* 2**14 = CIFS_MAX_MSGSIZE */
-       cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;
+       
+       /* Can not set i_flags here - they get immediately overwritten
+          to zero by the VFS */
+/*     cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
        INIT_LIST_HEAD(&cifs_inode->openFileList);
        return &cifs_inode->vfs_inode;
 }

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index e203f63..37c6ce8 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -90,6 +90,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                                (*pinode)->i_ino =
                                        (unsigned long)findData.UniqueId;
                        } /* note ino incremented to unique num in new_inode */
+                       if(sb->s_flags & MS_NOATIME)
+                               (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
+                               
                        insert_inode_hash(*pinode);
                }
 
@@ -421,6 +424,8 @@ int cifs_get_inode_info(struct inode **pinode,
                                } else /* do we need cast or hash to ino? */
                                        (*pinode)->i_ino = inode_num;
                        } /* else ino incremented to unique num in new_inode*/
+                       if(sb->s_flags & MS_NOATIME)
+                               (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
                        insert_inode_hash(*pinode);
                }
                inode = *pinode;

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 8e25996..6baea85 100644 (file)
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -77,7 +77,8 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
                cifsInode = CIFS_I(old_file->d_inode);
                if(rc == 0) {
                        old_file->d_inode->i_nlink++;
-                       old_file->d_inode->i_ctime = CURRENT_TIME;
+/* BB should we make this contingent on superblock flag NOATIME? */
+/*                     old_file->d_inode->i_ctime = CURRENT_TIME;*/
                        /* parent dir timestamps will update from srv
                        within a second, would it really be worth it
                        to set the parent dir cifs inode time to zero

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index c6220bd..c444798 100644 (file)
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -83,6 +83,8 @@ static int construct_dentry(struct qstr *qstring, struct file *file,
                                return rc;
                        rc = 1;
                }
+               if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
+                       (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
        } else {
                tmp_dentry = d_alloc(file->f_path.dentry, qstring);
                if(tmp_dentry == NULL) {
@@ -98,6 +100,8 @@ static int construct_dentry(struct qstr *qstring, struct file *file,
                        tmp_dentry->d_op = &cifs_dentry_ops;
                if(*ptmp_inode == NULL)
                        return rc;
+               if(file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
+                       (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;                       
                rc = 2;
        }