Merge tag 'nfs-for-4.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

[uclinux-h8/linux.git] / fs / nfs / inode.c

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 3689e95..f734562 100644 (file)
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -133,6 +133,13 @@ void nfs_evict_inode(struct inode *inode)
        nfs_clear_inode(inode);
 }
 
+int nfs_sync_inode(struct inode *inode)
+{
+       nfs_inode_dio_wait(inode);
+       return nfs_wb_all(inode);
+}
+EXPORT_SYMBOL_GPL(nfs_sync_inode);
+
 /**
  * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
  */
@@ -192,7 +199,6 @@ void nfs_zap_caches(struct inode *inode)
        nfs_zap_caches_locked(inode);
        spin_unlock(&inode->i_lock);
 }
-EXPORT_SYMBOL_GPL(nfs_zap_caches);
 
 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
 {
@@ -525,10 +531,8 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
        trace_nfs_setattr_enter(inode);
 
        /* Write all dirty data */
-       if (S_ISREG(inode->i_mode)) {
-               nfs_inode_dio_wait(inode);
-               nfs_wb_all(inode);
-       }
+       if (S_ISREG(inode->i_mode))
+               nfs_sync_inode(inode);
 
        fattr = nfs_alloc_fattr();
        if (fattr == NULL)
@@ -644,8 +648,9 @@ int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
        trace_nfs_getattr_enter(inode);
        /* Flush out writes to the server in order to update c/mtime.  */
        if (S_ISREG(inode->i_mode)) {
-               nfs_inode_dio_wait(inode);
-               err = filemap_write_and_wait(inode->i_mapping);
+               mutex_lock(&inode->i_mutex);
+               err = nfs_sync_inode(inode);
+               mutex_unlock(&inode->i_mutex);
                if (err)
                        goto out;
        }
@@ -1588,6 +1593,19 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa
 }
 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
 
+
+static inline bool nfs_fileid_valid(struct nfs_inode *nfsi,
+                                   struct nfs_fattr *fattr)
+{
+       bool ret1 = true, ret2 = true;
+
+       if (fattr->valid & NFS_ATTR_FATTR_FILEID)
+               ret1 = (nfsi->fileid == fattr->fileid);
+       if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
+               ret2 = (nfsi->fileid == fattr->mounted_on_fileid);
+       return ret1 || ret2;
+}
+
 /*
  * Many nfs protocol calls return the new file attributes after
  * an operation.  Here we update the inode to reflect the state
@@ -1614,7 +1632,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
                        nfs_display_fhandle_hash(NFS_FH(inode)),
                        atomic_read(&inode->i_count), fattr->valid);
 
-       if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) {
+       if (!nfs_fileid_valid(nfsi, fattr)) {
                printk(KERN_ERR "NFS: server %s error: fileid changed\n"
                        "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
                        NFS_SERVER(inode)->nfs_client->cl_hostname,
@@ -1819,7 +1837,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 struct inode *nfs_alloc_inode(struct super_block *sb)
 {
        struct nfs_inode *nfsi;
-       nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
+       nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
        if (!nfsi)
                return NULL;
        nfsi->flags = 0UL;