1 files changed, 75 insertions, 2 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e257172d438c..17529b5bc551 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -38,6 +38,7 @@
 #include "delegation.h"
 #include "iostat.h"
 #include "internal.h"
+#include "fscache.h"
 
 /* #define NFS_DEBUG_VERBOSE 1 */
 
@@ -1029,9 +1030,61 @@ static int is_atomic_open(struct nameidata *nd)
         return 1;
 }
 
+static struct nfs_open_context *nameidata_to_nfs_open_context(struct dentry *dentry, struct nameidata *nd)
+{
+        struct path path = {
+                .mnt = nd->path.mnt,
+                .dentry = dentry,
+        };
+        struct nfs_open_context *ctx;
+        struct rpc_cred *cred;
+        fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
+
+        cred = rpc_lookup_cred();
+        if (IS_ERR(cred))
+                return ERR_CAST(cred);
+        ctx = alloc_nfs_open_context(&path, cred, fmode);
+        put_rpccred(cred);
+        if (ctx == NULL)
+                return ERR_PTR(-ENOMEM);
+        return ctx;
+}
+
+static int do_open(struct inode *inode, struct file *filp)
+{
+        nfs_fscache_set_inode_cookie(inode, filp);
+        return 0;
+}
+
+static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ctx)
+{
+        struct file *filp;
+        int ret = 0;
+
+        /* If the open_intent is for execute, we have an extra check to make */
+        if (ctx->mode & FMODE_EXEC) {
+                ret = nfs_may_open(ctx->path.dentry->d_inode,
+                                ctx->cred,
+                                nd->intent.open.flags);
+                if (ret < 0)
+                        goto out;
+        }
+        filp = lookup_instantiate_filp(nd, ctx->path.dentry, do_open);
+        if (IS_ERR(filp))
+                ret = PTR_ERR(filp);
+        else
+                nfs_file_set_open_context(filp, ctx);
+out:
+        put_nfs_open_context(ctx);
+        return ret;
+}
+
 static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
+        struct nfs_open_context *ctx;
+        struct iattr attr;
         struct dentry *res = NULL;
+        int open_flags;
         int error;
 
         dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n",
@@ -1054,9 +1107,27 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
                 goto out;
         }
 
+        ctx = nameidata_to_nfs_open_context(dentry, nd);
+        res = ERR_CAST(ctx);
+        if (IS_ERR(ctx))
+                goto out;
+
+        open_flags = nd->intent.open.flags;
+        if (nd->flags & LOOKUP_CREATE) {
+                attr.ia_mode = nd->intent.open.create_mode;
+                attr.ia_valid = ATTR_MODE;
+                if (!IS_POSIXACL(dir))
+                        attr.ia_mode &= ~current_umask();
+        } else {
+                open_flags &= ~O_EXCL;
+                attr.ia_valid = 0;
+                BUG_ON(open_flags & O_CREAT);
+        }
+
         /* Open the file on the server */
-        res = nfs4_atomic_open(dir, dentry, nd);
+        res = nfs4_atomic_open(dir, ctx, open_flags, &attr);
         if (IS_ERR(res)) {
+                put_nfs_open_context(ctx);
                 error = PTR_ERR(res);
                 switch (error) {
                         /* Make a negative dentry */
@@ -1074,8 +1145,10 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
                         default:
                                 goto out;
                 }
-        } else if (res != NULL)
+        }
+        if (res != NULL)
                 dentry = res;
+        nfs_intent_set_file(nd, ctx);
 out:
         return res;
 no_open: