1 files changed, 18 insertions, 51 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 6300e05e9463..b2d16758ced8 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1148,27 +1148,6 @@ void nfs_end_data_update(struct inode *inode)
 }
 
 /**
- * nfs_end_data_update_defer
- * @inode - pointer to inode
- * Declare end of the operations that will update file data
- * This will defer marking the inode as needing revalidation
- * unless there are no other pending updates.
- */
-void nfs_end_data_update_defer(struct inode *inode)
-{
-        struct nfs_inode *nfsi = NFS_I(inode);
-
-        if (atomic_dec_and_test(&nfsi->data_updates)) {
-                /* Mark the attribute cache for revalidation */
-                nfsi->flags |= NFS_INO_INVALID_ATTR;
-                /* Directories and symlinks: invalidate page cache too */
-                if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
-                        nfsi->flags |= NFS_INO_INVALID_DATA;
-                nfsi->cache_change_attribute ++;
-        }
-}
-
-/**
  * nfs_refresh_inode - verify consistency of the inode attribute cache
  * @inode - pointer to inode
  * @fattr - updated attributes
@@ -1222,8 +1201,8 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
                 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)
                                 || cur_size != new_isize)
                         nfsi->flags |= NFS_INO_INVALID_ATTR;
-        } else if (S_ISREG(inode->i_mode) && new_isize > cur_size)
-                        nfsi->flags |= NFS_INO_INVALID_ATTR;
+        } else if (new_isize != cur_size && nfsi->npages == 0)
+                nfsi->flags |= NFS_INO_INVALID_ATTR;
 
         /* Have any file permissions changed? */
         if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
@@ -1257,10 +1236,8 @@ int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsigned long verifier)
 {
         struct nfs_inode *nfsi = NFS_I(inode);
-        __u64           new_size;
-        loff_t          new_isize;
+        loff_t cur_isize, new_isize;
         unsigned int    invalid = 0;
-        loff_t          cur_isize;
         int data_unstable;
 
         dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
@@ -1293,49 +1270,39 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsign
         /* Are we racing with known updates of the metadata on the server? */
         data_unstable = ! nfs_verify_change_attribute(inode, verifier);
 
-        /* Check if the file size agrees */
-        new_size = fattr->size;
+        /* Check if our cached file size is stale */
         new_isize = nfs_size_to_loff_t(fattr->size);
         cur_isize = i_size_read(inode);
-        if (cur_isize != new_size) {
-#ifdef NFS_DEBUG_VERBOSE
-                printk(KERN_DEBUG "NFS: isize change on %s/%ld\n", inode->i_sb->s_id, inode->i_ino);
-#endif
-                /*
-                 * If we have pending writebacks, things can get
-                 * messy.
-                 */
-                if (S_ISREG(inode->i_mode) && data_unstable) {
-                        if (new_isize > cur_isize) {
+        if (new_isize != cur_isize) {
+                /* Do we perhaps have any outstanding writes? */
+                if (nfsi->npages == 0) {
+                        /* No, but did we race with nfs_end_data_update()? */
+                        if (verifier  ==  nfsi->cache_change_attribute) {
                                 inode->i_size = new_isize;
-                                invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
+                                invalid |= NFS_INO_INVALID_DATA;
                         }
-                } else {
+                        invalid |= NFS_INO_INVALID_ATTR;
+                } else if (new_isize > cur_isize) {
                         inode->i_size = new_isize;
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
                 }
+                dprintk("NFS: isize change on server for file %s/%ld\n",
+                                inode->i_sb->s_id, inode->i_ino);
         }
 
-        /*
-         * Note: we don't check inode->i_mtime since pipes etc.
-         *       can change this value in VFS without requiring a
-         *       cache revalidation.
-         */
+        /* Check if the mtime agrees */
         if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
                 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
-#ifdef NFS_DEBUG_VERBOSE
-                printk(KERN_DEBUG "NFS: mtime change on %s/%ld\n", inode->i_sb->s_id, inode->i_ino);
-#endif
+                dprintk("NFS: mtime change on server for file %s/%ld\n",
+                                inode->i_sb->s_id, inode->i_ino);
                 if (!data_unstable)
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
         }
 
         if ((fattr->valid & NFS_ATTR_FATTR_V4)
             && nfsi->change_attr != fattr->change_attr) {
-#ifdef NFS_DEBUG_VERBOSE
-                printk(KERN_DEBUG "NFS: change_attr change on %s/%ld\n",
+                dprintk("NFS: change_attr change on server for file %s/%ld\n",
                        inode->i_sb->s_id, inode->i_ino);
-#endif
                 nfsi->change_attr = fattr->change_attr;
                 if (!data_unstable)
                         invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;