18 files changed, 278 insertions, 160 deletions

diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 8bf3a3f6925a..b7db60897f91 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -12,19 +12,19 @@ nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o
 nfs-$(CONFIG_SYSCTL)    += sysctl.o
 nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
 
-obj-$(CONFIG_NFS_V2) += nfs2.o
-nfs2-y := nfs2super.o proc.o nfs2xdr.o
+obj-$(CONFIG_NFS_V2) += nfsv2.o
+nfsv2-y := nfs2super.o proc.o nfs2xdr.o
 
-obj-$(CONFIG_NFS_V3) += nfs3.o
-nfs3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o
-nfs3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
+obj-$(CONFIG_NFS_V3) += nfsv3.o
+nfsv3-y := nfs3super.o nfs3client.o nfs3proc.o nfs3xdr.o
+nfsv3-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
 
-obj-$(CONFIG_NFS_V4) += nfs4.o
-nfs4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \
+obj-$(CONFIG_NFS_V4) += nfsv4.o
+nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \
           delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \
           nfs4namespace.o nfs4getroot.o nfs4client.o
-nfs4-$(CONFIG_SYSCTL)   += nfs4sysctl.o
-nfs4-$(CONFIG_NFS_V4_1) += pnfs.o pnfs_dev.o
+nfsv4-$(CONFIG_SYSCTL)  += nfs4sysctl.o
+nfsv4-$(CONFIG_NFS_V4_1)        += pnfs.o pnfs_dev.o
 
 obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o
 nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 9fc0d9dfc91b..99694442b93f 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -105,7 +105,7 @@ struct nfs_subversion *get_nfs_version(unsigned int version)
 
         if (IS_ERR(nfs)) {
                 mutex_lock(&nfs_version_mutex);
-                request_module("nfs%d", version);
+                request_module("nfsv%d", version);
                 nfs = find_nfs_version(version);
                 mutex_unlock(&nfs_version_mutex);
         }
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 75d6d0a3d32e..6a7fcab7ecb3 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -287,10 +287,12 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
         struct inode *inode = file->f_path.dentry->d_inode;
 
         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret != 0)
+                goto out;
         mutex_lock(&inode->i_mutex);
         ret = nfs_file_fsync_commit(file, start, end, datasync);
         mutex_unlock(&inode->i_mutex);
-
+out:
         return ret;
 }
 
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index b701358c39c3..a850079467d8 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -61,6 +61,12 @@ struct idmap {
         struct mutex            idmap_mutex;
 };
 
+struct idmap_legacy_upcalldata {
+        struct rpc_pipe_msg pipe_msg;
+        struct idmap_msg idmap_msg;
+        struct idmap *idmap;
+};
+
 /**
  * nfs_fattr_init_names - initialise the nfs_fattr owner_name/group_name fields
  * @fattr: fully initialised struct nfs_fattr
@@ -324,6 +330,7 @@ static ssize_t nfs_idmap_get_key(const char *name, size_t namelen,
                 ret = nfs_idmap_request_key(&key_type_id_resolver_legacy,
                                             name, namelen, type, data,
                                             data_size, idmap);
+                idmap->idmap_key_cons = NULL;
                 mutex_unlock(&idmap->idmap_mutex);
         }
         return ret;
@@ -380,11 +387,13 @@ static const match_table_t nfs_idmap_tokens = {
 static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *);
 static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
                                    size_t);
+static void idmap_release_pipe(struct inode *);
 static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
 
 static const struct rpc_pipe_ops idmap_upcall_ops = {
         .upcall         = rpc_pipe_generic_upcall,
         .downcall       = idmap_pipe_downcall,
+        .release_pipe   = idmap_release_pipe,
         .destroy_msg    = idmap_pipe_destroy_msg,
 };
 
@@ -616,7 +625,8 @@ void nfs_idmap_quit(void)
         nfs_idmap_quit_keyring();
 }
 
-static int nfs_idmap_prepare_message(char *desc, struct idmap_msg *im,
+static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap,
+                                     struct idmap_msg *im,
                                      struct rpc_pipe_msg *msg)
 {
         substring_t substr;
@@ -659,6 +669,7 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
                                    const char *op,
                                    void *aux)
 {
+        struct idmap_legacy_upcalldata *data;
         struct rpc_pipe_msg *msg;
         struct idmap_msg *im;
         struct idmap *idmap = (struct idmap *)aux;
@@ -666,15 +677,15 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
         int ret = -ENOMEM;
 
         /* msg and im are freed in idmap_pipe_destroy_msg */
-        msg = kmalloc(sizeof(*msg), GFP_KERNEL);
-        if (!msg)
-                goto out0;
-
-        im = kmalloc(sizeof(*im), GFP_KERNEL);
-        if (!im)
+        data = kmalloc(sizeof(*data), GFP_KERNEL);
+        if (!data)
                 goto out1;
 
-        ret = nfs_idmap_prepare_message(key->description, im, msg);
+        msg = &data->pipe_msg;
+        im = &data->idmap_msg;
+        data->idmap = idmap;
+
+        ret = nfs_idmap_prepare_message(key->description, idmap, im, msg);
         if (ret < 0)
                 goto out2;
 
@@ -683,15 +694,15 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 
         ret = rpc_queue_upcall(idmap->idmap_pipe, msg);
         if (ret < 0)
-                goto out2;
+                goto out3;
 
         return ret;
 
+out3:
+        idmap->idmap_key_cons = NULL;
 out2:
-        kfree(im);
+        kfree(data);
 out1:
-        kfree(msg);
-out0:
         complete_request_key(cons, ret);
         return ret;
 }
@@ -749,9 +760,8 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
         }
 
         if (!(im.im_status & IDMAP_STATUS_SUCCESS)) {
-                ret = mlen;
-                complete_request_key(cons, -ENOKEY);
-                goto out_incomplete;
+                ret = -ENOKEY;
+                goto out;
         }
 
         namelen_in = strnlen(im.im_name, IDMAP_NAMESZ);
@@ -768,16 +778,32 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 
 out:
         complete_request_key(cons, ret);
-out_incomplete:
         return ret;
 }
 
 static void
 idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg)
 {
+        struct idmap_legacy_upcalldata *data = container_of(msg,
+                        struct idmap_legacy_upcalldata,
+                        pipe_msg);
+        struct idmap *idmap = data->idmap;
+        struct key_construction *cons;
+        if (msg->errno) {
+                cons = ACCESS_ONCE(idmap->idmap_key_cons);
+                idmap->idmap_key_cons = NULL;
+                complete_request_key(cons, msg->errno);
+        }
         /* Free memory allocated in nfs_idmap_legacy_upcall() */
-        kfree(msg->data);
-        kfree(msg);
+        kfree(data);
+}
+
+static void
+idmap_release_pipe(struct inode *inode)
+{
+        struct rpc_inode *rpci = RPC_I(inode);
+        struct idmap *idmap = (struct idmap *)rpci->private;
+        idmap->idmap_key_cons = NULL;
 }
 
 int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, __u32 *uid)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c6e895f0fbf3..9b47610338f5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -154,7 +154,7 @@ static void nfs_zap_caches_locked(struct inode *inode)
         nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
         nfsi->attrtimeo_timestamp = jiffies;
 
-        memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
+        memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
         if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
                 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
         else
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 0952c791df36..69322096c325 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -69,7 +69,7 @@ do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
         nfs_fattr_init(info->fattr);
         status = rpc_call_sync(client, &msg, 0);
         dprintk("%s: reply fsinfo: %d\n", __func__, status);
-        if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
+        if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
                 msg.rpc_resp = info->fattr;
                 status = rpc_call_sync(client, &msg, 0);
@@ -643,7 +643,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                   u64 cookie, struct page **pages, unsigned int count, int plus)
 {
         struct inode            *dir = dentry->d_inode;
-        __be32                  *verf = NFS_COOKIEVERF(dir);
+        __be32                  *verf = NFS_I(dir)->cookieverf;
         struct nfs3_readdirargs arg = {
                 .fh             = NFS_FH(dir),
                 .cookie         = cookie,
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 3b950dd81e81..da0618aeeadb 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -205,6 +205,9 @@ extern const struct dentry_operations nfs4_dentry_operations;
 int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
                     unsigned, umode_t, int *);
 
+/* super.c */
+extern struct file_system_type nfs4_fs_type;
+
 /* nfs4namespace.c */
 rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *);
 struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *, struct inode *, struct qstr *);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index cbcdfaf32505..24eb663f8ed5 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -74,7 +74,7 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
         return clp;
 
 error:
-        kfree(clp);
+        nfs_free_client(clp);
         return ERR_PTR(err);
 }
 
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index acb65e7887f8..eb5eb8eef4d3 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -96,13 +96,15 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
         struct inode *inode = file->f_path.dentry->d_inode;
 
         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret != 0)
+                goto out;
         mutex_lock(&inode->i_mutex);
         ret = nfs_file_fsync_commit(file, start, end, datasync);
         if (!ret && !datasync)
                 /* application has asked for meta-data sync */
                 ret = pnfs_layoutcommit_inode(inode, true);
         mutex_unlock(&inode->i_mutex);
-
+out:
         return ret;
 }
 
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a99a8d948721..1e50326d00dd 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3215,11 +3215,11 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                         dentry->d_parent->d_name.name,
                         dentry->d_name.name,
                         (unsigned long long)cookie);
-        nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
+        nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
         res.pgbase = args.pgbase;
         status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
         if (status >= 0) {
-                memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
+                memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
                 status += args.pgbase;
         }
 
@@ -3653,11 +3653,11 @@ static inline int nfs4_server_supports_acls(struct nfs_server *server)
                 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
 }
 
-/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
- * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
+/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
+ * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
  * the stack.
  */
-#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
+#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
 
 static int buf_to_pages_noslab(const void *buf, size_t buflen,
                 struct page **pages, unsigned int *pgbase)
@@ -3668,7 +3668,7 @@ static int buf_to_pages_noslab(const void *buf, size_t buflen,
         spages = pages;
 
         do {
-                len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
+                len = min_t(size_t, PAGE_SIZE, buflen);
                 newpage = alloc_page(GFP_KERNEL);
 
                 if (newpage == NULL)
@@ -3737,9 +3737,10 @@ out:
 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
 {
         struct nfs4_cached_acl *acl;
+        size_t buflen = sizeof(*acl) + acl_len;
 
-        if (pages && acl_len <= PAGE_SIZE) {
-                acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
+        if (buflen <= PAGE_SIZE) {
+                acl = kmalloc(buflen, GFP_KERNEL);
                 if (acl == NULL)
                         goto out;
                 acl->cached = 1;
@@ -3781,17 +3782,15 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
                 .rpc_argp = &args,
                 .rpc_resp = &res,
         };
-        int ret = -ENOMEM, npages, i;
-        size_t acl_len = 0;
+        unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
+        int ret = -ENOMEM, i;
 
-        npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
         /* As long as we're doing a round trip to the server anyway,
          * let's be prepared for a page of acl data. */
         if (npages == 0)
                 npages = 1;
-
-        /* Add an extra page to handle the bitmap returned */
-        npages++;
+        if (npages > ARRAY_SIZE(pages))
+                return -ERANGE;
 
         for (i = 0; i < npages; i++) {
                 pages[i] = alloc_page(GFP_KERNEL);
@@ -3807,11 +3806,6 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
         args.acl_len = npages * PAGE_SIZE;
         args.acl_pgbase = 0;
 
-        /* Let decode_getfacl know not to fail if the ACL data is larger than
-         * the page we send as a guess */
-        if (buf == NULL)
-                res.acl_flags |= NFS4_ACL_LEN_REQUEST;
-
         dprintk("%s  buf %p buflen %zu npages %d args.acl_len %zu\n",
                 __func__, buf, buflen, npages, args.acl_len);
         ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
@@ -3819,20 +3813,19 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
         if (ret)
                 goto out_free;
 
-        acl_len = res.acl_len - res.acl_data_offset;
-        if (acl_len > args.acl_len)
-                nfs4_write_cached_acl(inode, NULL, 0, acl_len);
-        else
-                nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
-                                      acl_len);
-        if (buf) {
+        /* Handle the case where the passed-in buffer is too short */
+        if (res.acl_flags & NFS4_ACL_TRUNC) {
+                /* Did the user only issue a request for the acl length? */
+                if (buf == NULL)
+                        goto out_ok;
                 ret = -ERANGE;
-                if (acl_len > buflen)
-                        goto out_free;
-                _copy_from_pages(buf, pages, res.acl_data_offset,
-                                acl_len);
+                goto out_free;
         }
-        ret = acl_len;
+        nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
+        if (buf)
+                _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
+out_ok:
+        ret = res.acl_len;
 out_free:
         for (i = 0; i < npages; i++)
                 if (pages[i])
@@ -3890,10 +3883,13 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
                 .rpc_argp       = &arg,
                 .rpc_resp       = &res,
         };
+        unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
         int ret, i;
 
         if (!nfs4_server_supports_acls(server))
                 return -EOPNOTSUPP;
+        if (npages > ARRAY_SIZE(pages))
+                return -ERANGE;
         i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
         if (i < 0)
                 return i;
@@ -6223,11 +6219,58 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
         dprintk("<-- %s\n", __func__);
 }
 
+static size_t max_response_pages(struct nfs_server *server)
+{
+        u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
+        return nfs_page_array_len(0, max_resp_sz);
+}
+
+static void nfs4_free_pages(struct page **pages, size_t size)
+{
+        int i;
+
+        if (!pages)
+                return;
+
+        for (i = 0; i < size; i++) {
+                if (!pages[i])
+                        break;
+                __free_page(pages[i]);
+        }
+        kfree(pages);
+}
+
+static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
+{
+        struct page **pages;
+        int i;
+
+        pages = kcalloc(size, sizeof(struct page *), gfp_flags);
+        if (!pages) {
+                dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
+                return NULL;
+        }
+
+        for (i = 0; i < size; i++) {
+                pages[i] = alloc_page(gfp_flags);
+                if (!pages[i]) {
+                        dprintk("%s: failed to allocate page\n", __func__);
+                        nfs4_free_pages(pages, size);
+                        return NULL;
+                }
+        }
+
+        return pages;
+}
+
 static void nfs4_layoutget_release(void *calldata)
 {
         struct nfs4_layoutget *lgp = calldata;
+        struct nfs_server *server = NFS_SERVER(lgp->args.inode);
+        size_t max_pages = max_response_pages(server);
 
         dprintk("--> %s\n", __func__);
+        nfs4_free_pages(lgp->args.layout.pages, max_pages);
         put_nfs_open_context(lgp->args.ctx);
         kfree(calldata);
         dprintk("<-- %s\n", __func__);
@@ -6239,9 +6282,10 @@ static const struct rpc_call_ops nfs4_layoutget_call_ops = {
         .rpc_release = nfs4_layoutget_release,
 };
 
-int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
+void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
 {
         struct nfs_server *server = NFS_SERVER(lgp->args.inode);
+        size_t max_pages = max_response_pages(server);
         struct rpc_task *task;
         struct rpc_message msg = {
                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
@@ -6259,12 +6303,19 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
 
         dprintk("--> %s\n", __func__);
 
+        lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
+        if (!lgp->args.layout.pages) {
+                nfs4_layoutget_release(lgp);
+                return;
+        }
+        lgp->args.layout.pglen = max_pages * PAGE_SIZE;
+
         lgp->res.layoutp = &lgp->args.layout;
         lgp->res.seq_res.sr_slot = NULL;
         nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
         task = rpc_run_task(&task_setup_data);
         if (IS_ERR(task))
-                return PTR_ERR(task);
+                return;
         status = nfs4_wait_for_completion_rpc_task(task);
         if (status == 0)
                 status = task->tk_status;
@@ -6272,7 +6323,7 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
                 status = pnfs_layout_process(lgp);
         rpc_put_task(task);
         dprintk("<-- %s status=%d\n", __func__, status);
-        return status;
+        return;
 }
 
 static void
@@ -6304,12 +6355,8 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
                 return;
         }
         spin_lock(&lo->plh_inode->i_lock);
-        if (task->tk_status == 0) {
-                if (lrp->res.lrs_present) {
-                        pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
-                } else
-                        BUG_ON(!list_empty(&lo->plh_segs));
-        }
+        if (task->tk_status == 0 && lrp->res.lrs_present)
+                pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
         lo->plh_block_lgets--;
         spin_unlock(&lo->plh_inode->i_lock);
         dprintk("<-- %s\n", __func__);
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 12a31a9dbcdd..bd61221ad2c5 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -23,14 +23,6 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
 static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type,
         int flags, const char *dev_name, void *raw_data);
 
-static struct file_system_type nfs4_fs_type = {
-        .owner          = THIS_MODULE,
-        .name           = "nfs4",
-        .mount          = nfs_fs_mount,
-        .kill_sb        = nfs_kill_super,
-        .fs_flags       = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
 static struct file_system_type nfs4_remote_fs_type = {
         .owner          = THIS_MODULE,
         .name           = "nfs4",
@@ -344,14 +336,8 @@ static int __init init_nfs_v4(void)
         if (err)
                 goto out1;
 
-        err = register_filesystem(&nfs4_fs_type);
-        if (err < 0)
-                goto out2;
-
         register_nfs_version(&nfs_v4);
         return 0;
-out2:
-        nfs4_unregister_sysctl();
 out1:
         nfs_idmap_quit();
 out:
@@ -361,7 +347,6 @@ out:
 static void __exit exit_nfs_v4(void)
 {
         unregister_nfs_version(&nfs_v4);
-        unregister_filesystem(&nfs4_fs_type);
         nfs4_unregister_sysctl();
         nfs_idmap_quit();
 }
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index ca13483edd60..8dba6bd48557 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -5045,22 +5045,19 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
                          struct nfs_getaclres *res)
 {
         unsigned int savep;
-        __be32 *bm_p;
         uint32_t attrlen,
                  bitmap[3] = {0};
         int status;
-        size_t page_len = xdr->buf->page_len;
+        unsigned int pg_offset;
 
         res->acl_len = 0;
         if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
                 goto out;
 
-        bm_p = xdr->p;
-        res->acl_data_offset = be32_to_cpup(bm_p) + 2;
-        res->acl_data_offset <<= 2;
-        /* Check if the acl data starts beyond the allocated buffer */
-        if (res->acl_data_offset > page_len)
-                return -ERANGE;
+        xdr_enter_page(xdr, xdr->buf->page_len);
+
+        /* Calculate the offset of the page data */
+        pg_offset = xdr->buf->head[0].iov_len;
 
         if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
                 goto out;
@@ -5074,23 +5071,16 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
                 /* The bitmap (xdr len + bitmaps) and the attr xdr len words
                  * are stored with the acl data to handle the problem of
                  * variable length bitmaps.*/
-                xdr->p = bm_p;
-
-                /* We ignore &savep and don't do consistency checks on
-                 * the attr length.  Let userspace figure it out.... */
-                attrlen += res->acl_data_offset;
-                if (attrlen > page_len) {
-                        if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
-                                /* getxattr interface called with a NULL buf */
-                                res->acl_len = attrlen;
-                                goto out;
-                        }
-                        dprintk("NFS: acl reply: attrlen %u > page_len %zu\n",
-                                        attrlen, page_len);
-                        return -EINVAL;
-                }
-                xdr_read_pages(xdr, attrlen);
+                res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
                 res->acl_len = attrlen;
+
+                /* Check for receive buffer overflow */
+                if (res->acl_len > (xdr->nwords << 2) ||
+                    res->acl_len + res->acl_data_offset > xdr->buf->page_len) {
+                        res->acl_flags |= NFS4_ACL_TRUNC;
+                        dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
+                                        attrlen, xdr->nwords << 2);
+                }
         } else
                 status = -EOPNOTSUPP;
 
@@ -6235,7 +6225,8 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
         status = decode_open(xdr, res);
         if (status)
                 goto out;
-        if (decode_getfh(xdr, &res->fh) != 0)
+        status = decode_getfh(xdr, &res->fh);
+        if (status)
                 goto out;
         decode_getfattr(xdr, res->f_attr, res->server);
 out:
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index f50d3e8d6f22..ea6d111b03e9 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -570,17 +570,66 @@ static bool objio_pg_test(struct nfs_pageio_descriptor *pgio,
                 return false;
 
         return pgio->pg_count + req->wb_bytes <=
-                        OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+                        (unsigned long)pgio->pg_layout_private;
+}
+
+void objio_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
+{
+        pnfs_generic_pg_init_read(pgio, req);
+        if (unlikely(pgio->pg_lseg == NULL))
+                return; /* Not pNFS */
+
+        pgio->pg_layout_private = (void *)
+                                OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+}
+
+static bool aligned_on_raid_stripe(u64 offset, struct ore_layout *layout,
+                                   unsigned long *stripe_end)
+{
+        u32 stripe_off;
+        unsigned stripe_size;
+
+        if (layout->raid_algorithm == PNFS_OSD_RAID_0)
+                return true;
+
+        stripe_size = layout->stripe_unit *
+                                (layout->group_width - layout->parity);
+
+        div_u64_rem(offset, stripe_size, &stripe_off);
+        if (!stripe_off)
+                return true;
+
+        *stripe_end = stripe_size - stripe_off;
+        return false;
+}
+
+void objio_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
+{
+        unsigned long stripe_end = 0;
+
+        pnfs_generic_pg_init_write(pgio, req);
+        if (unlikely(pgio->pg_lseg == NULL))
+                return; /* Not pNFS */
+
+        if (req->wb_offset ||
+            !aligned_on_raid_stripe(req->wb_index * PAGE_SIZE,
+                               &OBJIO_LSEG(pgio->pg_lseg)->layout,
+                               &stripe_end)) {
+                pgio->pg_layout_private = (void *)stripe_end;
+        } else {
+                pgio->pg_layout_private = (void *)
+                                OBJIO_LSEG(pgio->pg_lseg)->layout.max_io_length;
+        }
 }
 
 static const struct nfs_pageio_ops objio_pg_read_ops = {
-        .pg_init = pnfs_generic_pg_init_read,
+        .pg_init = objio_init_read,
         .pg_test = objio_pg_test,
         .pg_doio = pnfs_generic_pg_readpages,
 };
 
 static const struct nfs_pageio_ops objio_pg_write_ops = {
-        .pg_init = pnfs_generic_pg_init_write,
+        .pg_init = objio_init_write,
         .pg_test = objio_pg_test,
         .pg_doio = pnfs_generic_pg_writepages,
 };
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 1a6732ed04a4..311a79681e2b 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -49,6 +49,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
         hdr->io_start = req_offset(hdr->req);
         hdr->good_bytes = desc->pg_count;
         hdr->dreq = desc->pg_dreq;
+        hdr->layout_private = desc->pg_layout_private;
         hdr->release = release;
         hdr->completion_ops = desc->pg_completion_ops;
         if (hdr->completion_ops->init_hdr)
@@ -268,6 +269,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
         desc->pg_error = 0;
         desc->pg_lseg = NULL;
         desc->pg_dreq = NULL;
+        desc->pg_layout_private = NULL;
 }
 EXPORT_SYMBOL_GPL(nfs_pageio_init);
 
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 76875bfcf19c..2e00feacd4be 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -583,9 +583,6 @@ send_layoutget(struct pnfs_layout_hdr *lo,
         struct nfs_server *server = NFS_SERVER(ino);
         struct nfs4_layoutget *lgp;
         struct pnfs_layout_segment *lseg = NULL;
-        struct page **pages = NULL;
-        int i;
-        u32 max_resp_sz, max_pages;
 
         dprintk("--> %s\n", __func__);
 
@@ -594,20 +591,6 @@ send_layoutget(struct pnfs_layout_hdr *lo,
         if (lgp == NULL)
                 return NULL;
 
-        /* allocate pages for xdr post processing */
-        max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
-        max_pages = nfs_page_array_len(0, max_resp_sz);
-
-        pages = kcalloc(max_pages, sizeof(struct page *), gfp_flags);
-        if (!pages)
-                goto out_err_free;
-
-        for (i = 0; i < max_pages; i++) {
-                pages[i] = alloc_page(gfp_flags);
-                if (!pages[i])
-                        goto out_err_free;
-        }
-
         lgp->args.minlength = PAGE_CACHE_SIZE;
         if (lgp->args.minlength > range->length)
                 lgp->args.minlength = range->length;
@@ -616,39 +599,19 @@ send_layoutget(struct pnfs_layout_hdr *lo,
         lgp->args.type = server->pnfs_curr_ld->id;
         lgp->args.inode = ino;
         lgp->args.ctx = get_nfs_open_context(ctx);
-        lgp->args.layout.pages = pages;
-        lgp->args.layout.pglen = max_pages * PAGE_SIZE;
         lgp->lsegpp = &lseg;
         lgp->gfp_flags = gfp_flags;
 
         /* Synchronously retrieve layout information from server and
          * store in lseg.
          */
-        nfs4_proc_layoutget(lgp);
+        nfs4_proc_layoutget(lgp, gfp_flags);
         if (!lseg) {
                 /* remember that LAYOUTGET failed and suspend trying */
                 set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
         }
 
-        /* free xdr pages */
-        for (i = 0; i < max_pages; i++)
-                __free_page(pages[i]);
-        kfree(pages);
-
         return lseg;
-
-out_err_free:
-        /* free any allocated xdr pages, lgp as it's not used */
-        if (pages) {
-                for (i = 0; i < max_pages; i++) {
-                        if (!pages[i])
-                                break;
-                        __free_page(pages[i]);
-                }
-                kfree(pages);
-        }
-        kfree(lgp);
-        return NULL;
 }
 
 /*
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 2c6c80503ba4..745aa1b39e7c 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -172,7 +172,7 @@ extern int nfs4_proc_getdevicelist(struct nfs_server *server,
                                    struct pnfs_devicelist *devlist);
 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
                                    struct pnfs_device *dev);
-extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
+extern void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
 
 /* pnfs.c */
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ac6a3c55dce4..b8eda700584b 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -319,6 +319,34 @@ EXPORT_SYMBOL_GPL(nfs_sops);
 static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
 static int nfs4_validate_mount_data(void *options,
         struct nfs_parsed_mount_data *args, const char *dev_name);
+
+struct file_system_type nfs4_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "nfs4",
+        .mount          = nfs_fs_mount,
+        .kill_sb        = nfs_kill_super,
+        .fs_flags       = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+EXPORT_SYMBOL_GPL(nfs4_fs_type);
+
+static int __init register_nfs4_fs(void)
+{
+        return register_filesystem(&nfs4_fs_type);
+}
+
+static void unregister_nfs4_fs(void)
+{
+        unregister_filesystem(&nfs4_fs_type);
+}
+#else
+static int __init register_nfs4_fs(void)
+{
+        return 0;
+}
+
+static void unregister_nfs4_fs(void)
+{
+}
 #endif
 
 static struct shrinker acl_shrinker = {
@@ -337,12 +365,18 @@ int __init register_nfs_fs(void)
         if (ret < 0)
                 goto error_0;
 
-        ret = nfs_register_sysctl();
+        ret = register_nfs4_fs();
         if (ret < 0)
                 goto error_1;
+
+        ret = nfs_register_sysctl();
+        if (ret < 0)
+                goto error_2;
         register_shrinker(&acl_shrinker);
         return 0;
 
+error_2:
+        unregister_nfs4_fs();
 error_1:
         unregister_filesystem(&nfs_fs_type);
 error_0:
@@ -356,6 +390,7 @@ void __exit unregister_nfs_fs(void)
 {
         unregister_shrinker(&acl_shrinker);
         nfs_unregister_sysctl();
+        unregister_nfs4_fs();
         unregister_filesystem(&nfs_fs_type);
 }
 
@@ -1832,6 +1867,7 @@ static int nfs23_validate_mount_data(void *options,
 
                 memcpy(sap, &data->addr, sizeof(data->addr));
                 args->nfs_server.addrlen = sizeof(data->addr);
+                args->nfs_server.port = ntohs(data->addr.sin_port);
                 if (!nfs_verify_server_address(sap))
                         goto out_no_address;
 
@@ -2529,6 +2565,7 @@ static int nfs4_validate_mount_data(void *options,
                         return -EFAULT;
                 if (!nfs_verify_server_address(sap))
                         goto out_no_address;
+                args->nfs_server.port = ntohs(((struct sockaddr_in *)sap)->sin_port);
 
                 if (data->auth_flavourlen) {
                         if (data->auth_flavourlen > 1)
@@ -2645,4 +2682,6 @@ MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
 module_param(send_implementation_id, ushort, 0644);
 MODULE_PARM_DESC(send_implementation_id,
                 "Send implementation ID with NFSv4.1 exchange_id");
+MODULE_ALIAS("nfs4");
+
 #endif /* CONFIG_NFS_V4 */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 5829d0ce7cfb..e3b55372726c 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1814,19 +1814,19 @@ int __init nfs_init_writepagecache(void)
         nfs_wdata_mempool = mempool_create_slab_pool(MIN_POOL_WRITE,
                                                      nfs_wdata_cachep);
         if (nfs_wdata_mempool == NULL)
-                return -ENOMEM;
+                goto out_destroy_write_cache;
 
         nfs_cdata_cachep = kmem_cache_create("nfs_commit_data",
                                              sizeof(struct nfs_commit_data),
                                              0, SLAB_HWCACHE_ALIGN,
                                              NULL);
         if (nfs_cdata_cachep == NULL)
-                return -ENOMEM;
+                goto out_destroy_write_mempool;
 
         nfs_commit_mempool = mempool_create_slab_pool(MIN_POOL_COMMIT,
                                                       nfs_wdata_cachep);
         if (nfs_commit_mempool == NULL)
-                return -ENOMEM;
+                goto out_destroy_commit_cache;
 
         /*
          * NFS congestion size, scale with available memory.
@@ -1849,11 +1849,20 @@ int __init nfs_init_writepagecache(void)
                 nfs_congestion_kb = 256*1024;
 
         return 0;
+
+out_destroy_commit_cache:
+        kmem_cache_destroy(nfs_cdata_cachep);
+out_destroy_write_mempool:
+        mempool_destroy(nfs_wdata_mempool);
+out_destroy_write_cache:
+        kmem_cache_destroy(nfs_wdata_cachep);
+        return -ENOMEM;
 }
 
 void nfs_destroy_writepagecache(void)
 {
         mempool_destroy(nfs_commit_mempool);
+        kmem_cache_destroy(nfs_cdata_cachep);
         mempool_destroy(nfs_wdata_mempool);
         kmem_cache_destroy(nfs_wdata_cachep);
 }