libnfs: Add lutimes
[deb_libnfs.git] / lib / libnfs.c
index 402597ba241abf5a625a5a46d2ad2cfb89d278f0..72d4df496262e8945dbb3c8a7800656207187e9f 100644 (file)
 #include <strings.h>
 #endif
 
+#ifdef MAJOR_IN_MKDEV
+#include <sys/mkdev.h>
+#endif
+
+#ifdef MAJOR_IN_SYSMACROS
+#include <sys/sysmacros.h>
+#endif
+
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include "libnfs-zdr.h"
+#include "slist.h"
 #include "libnfs.h"
 #include "libnfs-raw.h"
 #include "libnfs-raw-mount.h"
 #include "libnfs-raw-nfs.h"
+#include "libnfs-raw-portmap.h"
 #include "libnfs-private.h"
 
+#define MAX_DIR_CACHE 128
+#define MAX_LINK_COUNT 40
+
 struct nfsdir {
+       struct nfs_fh3 fh;
+       fattr3 attr;
+       struct nfsdir *next;
+
        struct nfsdirent *entries;
        struct nfsdirent *current;
 };
 
+struct nfs_readahead {
+       uint64_t fh_offset;
+       uint64_t last_offset;
+       uint64_t buf_offset;
+       uint64_t buf_count;
+       time_t buf_ts;
+       void *buf;
+       uint32_t cur_ra;
+};
+
 struct nfsfh {
        struct nfs_fh3 fh;
        int is_sync;
+       int is_append;
        uint64_t offset;
+       struct nfs_readahead ra;
 };
 
 struct nfs_context {
@@ -93,6 +122,8 @@ struct nfs_context {
        struct nfs_fh3 rootfh;
        uint64_t readmax;
        uint64_t writemax;
+       char *cwd;
+       struct nfsdir *dircache;
 };
 
 void nfs_free_nfsdir(struct nfsdir *nfsdir)
@@ -105,16 +136,48 @@ void nfs_free_nfsdir(struct nfsdir *nfsdir)
                free(nfsdir->entries);
                nfsdir->entries = dirent;
        }
+       free(nfsdir->fh.data.data_val);
        free(nfsdir);
 }
 
+static void nfs_dircache_add(struct nfs_context *nfs, struct nfsdir *nfsdir)
+{
+       int i;
+       LIBNFS_LIST_ADD(&nfs->dircache, nfsdir);
+
+       for (nfsdir = nfs->dircache, i = 0; nfsdir; nfsdir = nfsdir->next, i++) {
+               if (i > MAX_DIR_CACHE) {
+                       LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
+                       nfs_free_nfsdir(nfsdir);
+                       break;
+               }
+       }
+}
+
+static struct nfsdir *nfs_dircache_find(struct nfs_context *nfs, struct nfs_fh3 *fh)
+{
+       struct nfsdir *nfsdir;
+
+       for (nfsdir = nfs->dircache; nfsdir; nfsdir = nfsdir->next) {
+               if (nfsdir->fh.data.data_len == fh->data.data_len &&
+                   !memcmp(nfsdir->fh.data.data_val, fh->data.data_val, fh->data.data_len)) {
+                       LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
+                       return nfsdir;
+               }
+       }
+
+       return NULL;
+}
+
 struct nfs_cb_data;
-typedef int (*continue_func)(struct nfs_context *nfs, struct nfs_cb_data *data);
+typedef int (*continue_func)(struct nfs_context *nfs, fattr3 *attr,
+                            struct nfs_cb_data *data);
 
 struct nfs_cb_data {
        struct nfs_context *nfs;
        struct nfsfh *nfsfh;
        char *saved_path, *path;
+       int link_count, no_follow;
 
        nfs_cb cb;
        void *private_data;
@@ -129,19 +192,22 @@ struct nfs_cb_data {
        /* for multi-read/write calls. */
        int error;
        int cancel;
+       int oom;
        int num_calls;
-       uint64_t start_offset, max_offset;
+       uint64_t offset, count, max_offset, org_offset, org_count;
        char *buffer;
+       char *usrbuf;
 };
 
 struct nfs_mcb_data {
        struct nfs_cb_data *data;
        uint64_t offset;
        uint64_t count;
+       int update_pos;
 };
 
-static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb_data *data, struct nfs_fh3 *fh);
-
+static int nfs_lookup_path_async_internal(struct nfs_context *nfs, fattr3 *attr, struct nfs_cb_data *data, struct nfs_fh3 *fh);
+static int nfs_normalize_path(struct nfs_context *nfs, char *path);
 
 void nfs_set_auth(struct nfs_context *nfs, struct AUTH *auth)
 {
@@ -175,12 +241,14 @@ char *nfs_get_error(struct nfs_context *nfs)
 
 static int nfs_set_context_args(struct nfs_context *nfs, char *arg, char *val)
 {
-       if (!strncmp(arg, "tcp-syncnt", 10)) {
+       if (!strcmp(arg, "tcp-syncnt")) {
                rpc_set_tcp_syncnt(nfs_get_rpc_context(nfs), atoi(val));
-       } else if (!strncmp(arg, "uid", 3)) {
+       } else if (!strcmp(arg, "uid")) {
                rpc_set_uid(nfs_get_rpc_context(nfs), atoi(val));
-       } else if (!strncmp(arg, "gid", 3)) {
+       } else if (!strcmp(arg, "gid")) {
                rpc_set_gid(nfs_get_rpc_context(nfs), atoi(val));
+       } else if (!strcmp(arg, "readahaed")) {
+               rpc_set_readahead(nfs_get_rpc_context(nfs), atoi(val));
        }
        return 0;
 }
@@ -334,17 +402,15 @@ struct nfs_context *nfs_init_context(void)
        if (nfs == NULL) {
                return NULL;
        }
+       memset(nfs, 0, sizeof(struct nfs_context));
+
        nfs->rpc = rpc_init_context();
        if (nfs->rpc == NULL) {
                free(nfs);
                return NULL;
        }
 
-       nfs->server = NULL;
-       nfs->export = NULL;
-
-       nfs->rootfh.data.data_len = 0;
-       nfs->rootfh.data.data_val = NULL;
+       nfs->cwd = strdup("/");
 
        return nfs;
 }
@@ -364,11 +430,22 @@ void nfs_destroy_context(struct nfs_context *nfs)
                nfs->export = NULL;
        }
 
+       if (nfs->cwd) {
+               free(nfs->cwd);
+               nfs->cwd = NULL;
+       }
+
        if (nfs->rootfh.data.data_val != NULL) {
                free(nfs->rootfh.data.data_val);
                nfs->rootfh.data.data_val = NULL;
        }
 
+       while (nfs->dircache) {
+               struct nfsdir *nfsdir = nfs->dircache;
+               LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
+               nfs_free_nfsdir(nfsdir);
+       }
+
        free(nfs);
 }
 
@@ -388,6 +465,30 @@ void free_rpc_cb_data(struct rpc_cb_data *data)
        free(data);
 }
 
+static void rpc_connect_program_5_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct rpc_cb_data *data = private_data;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       /* Dont want any more callbacks even if the socket is closed */
+       rpc->connect_cb = NULL;
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(rpc, status, command_data, data->private_data);
+               free_rpc_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(rpc, status, "Command was cancelled", data->private_data);
+               free_rpc_cb_data(data);
+               return;
+       }
+
+       data->cb(rpc, status, NULL, data->private_data);
+       free_rpc_cb_data(data);
+}
+
 static void rpc_connect_program_4_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct rpc_cb_data *data = private_data;
@@ -408,6 +509,25 @@ static void rpc_connect_program_4_cb(struct rpc_context *rpc, int status, void *
                return;
        }
 
+       switch (data->program) {
+       case MOUNT_PROGRAM:
+               if (rpc_mount3_null_async(rpc, rpc_connect_program_5_cb,
+                                       data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               return;
+       case NFS_PROGRAM:
+               if (rpc_nfs3_null_async(rpc, rpc_connect_program_5_cb,
+                                       data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               return;
+       }
+
        data->cb(rpc, status, NULL, data->private_data);
        free_rpc_cb_data(data);
 }
@@ -415,11 +535,13 @@ static void rpc_connect_program_4_cb(struct rpc_context *rpc, int status, void *
 static void rpc_connect_program_3_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct rpc_cb_data *data = private_data;
-       uint32_t rpc_port;
+       struct pmap3_string_result *gar;
+       uint32_t rpc_port = 0;
+       unsigned char *ptr;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
-       if (status == RPC_STATUS_ERROR) {       
+       if (status == RPC_STATUS_ERROR) {
                data->cb(rpc, status, command_data, data->private_data);
                free_rpc_cb_data(data);
                return;
@@ -430,7 +552,29 @@ static void rpc_connect_program_3_cb(struct rpc_context *rpc, int status, void *
                return;
        }
 
-       rpc_port = *(uint32_t *)command_data;
+       switch (rpc->s.ss_family) {
+       case AF_INET:
+               rpc_port = *(uint32_t *)command_data;
+               break;
+       case AF_INET6:
+               /* ouch. portmapper and ipv6 are not great */
+               gar = command_data;
+               if (gar->addr == NULL) {
+                       break;
+               }
+               ptr = strrchr(gar->addr, '.');
+               if (ptr == NULL) {
+                       break;
+               }
+               rpc_port = atoi(ptr + 1);
+               *ptr = 0;
+               ptr = strrchr(gar->addr, '.');
+               if (ptr == NULL) {
+                       break;
+               }
+               rpc_port += 256 * atoi(ptr + 1);
+               break;
+       }
        if (rpc_port == 0) {
                rpc_set_error(rpc, "RPC error. Program is not available on %s", data->server);
                data->cb(rpc, RPC_STATUS_ERROR, rpc_get_error(rpc), data->private_data);
@@ -449,6 +593,7 @@ static void rpc_connect_program_3_cb(struct rpc_context *rpc, int status, void *
 static void rpc_connect_program_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct rpc_cb_data *data = private_data;
+       struct pmap3_mapping map;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -463,10 +608,26 @@ static void rpc_connect_program_2_cb(struct rpc_context *rpc, int status, void *
                return;
        }
 
-       if (rpc_pmap_getport_async(rpc, data->program, data->version, IPPROTO_TCP, rpc_connect_program_3_cb, private_data) != 0) {
-               data->cb(rpc, status, command_data, data->private_data);
-               free_rpc_cb_data(data);
-               return;
+       switch (rpc->s.ss_family) {
+       case AF_INET:
+               if (rpc_pmap2_getport_async(rpc, data->program, data->version, IPPROTO_TCP, rpc_connect_program_3_cb, private_data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               break;
+       case AF_INET6:
+               map.prog=data->program;
+               map.vers=data->version;
+               map.netid="";
+               map.addr="";
+               map.owner="";
+               if (rpc_pmap3_getaddr_async(rpc, &map, rpc_connect_program_3_cb, private_data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               break;
        }
 }
 
@@ -490,14 +651,25 @@ static void rpc_connect_program_1_cb(struct rpc_context *rpc, int status, void *
                return;
        }
 
-       if (rpc_pmap_null_async(rpc, rpc_connect_program_2_cb, data) != 0) {
-               data->cb(rpc, status, command_data, data->private_data);
-               free_rpc_cb_data(data);
-               return;
+       switch (rpc->s.ss_family) {
+       case AF_INET:
+               if (rpc_pmap2_null_async(rpc, rpc_connect_program_2_cb, data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               break;
+       case AF_INET6:
+               if (rpc_pmap3_null_async(rpc, rpc_connect_program_2_cb, data) != 0) {
+                       data->cb(rpc, status, command_data, data->private_data);
+                       free_rpc_cb_data(data);
+                       return;
+               }
+               break;
        }
 }
 
-int rpc_connect_program_async(struct rpc_context *rpc, char *server, int program, int version, rpc_cb cb, void *private_data)
+int rpc_connect_program_async(struct rpc_context *rpc, const char *server, int program, int version, rpc_cb cb, void *private_data)
 {
        struct rpc_cb_data *data;
 
@@ -521,33 +693,29 @@ int rpc_connect_program_async(struct rpc_context *rpc, char *server, int program
        return 0;
 }
 
-void free_nfs_cb_data(struct nfs_cb_data *data)
+static void free_nfs_cb_data(struct nfs_cb_data *data)
 {
-       if (data->saved_path != NULL) {
-               free(data->saved_path);
-               data->saved_path = NULL;
-       }
-
        if (data->continue_data != NULL) {
+               assert(data->free_continue_data);
                data->free_continue_data(data->continue_data);
-               data->continue_data = NULL;
-       }
-
-       if (data->fh.data.data_val != NULL) {
-               free(data->fh.data.data_val);
-               data->fh.data.data_val = NULL;
        }
 
-       if (data->buffer != NULL) {
-               free(data->buffer);
-               data->buffer = NULL;
-       }
+       free(data->saved_path);
+       free(data->fh.data.data_val);
+       free(data->buffer);
 
        free(data);
 }
 
-
-
+static void free_nfsfh(struct nfsfh *nfsfh)
+{
+       if (nfsfh->fh.data.data_val != NULL) {
+               free(nfsfh->fh.data.data_val);
+               nfsfh->fh.data.data_val = NULL;
+       }
+       free(nfsfh->ra.buf);
+       free(nfsfh);
+}
 
 
 static void nfs_mount_10_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
@@ -624,6 +792,9 @@ static void nfs_mount_8_cb(struct rpc_context *rpc, int status, void *command_da
                return;
        }
 
+       /* NFS TCP connections we want to autoreconnect after sessions are torn down (due to inactivity or error) */
+       rpc_set_autoreconnect(rpc);
+
        args.fsroot = nfs->rootfh;
        if (rpc_nfs3_fsinfo_async(rpc, nfs_mount_9_cb, &args, data) != 0) {
                data->cb(-ENOMEM, nfs, command_data, data->private_data);
@@ -632,36 +803,6 @@ static void nfs_mount_8_cb(struct rpc_context *rpc, int status, void *command_da
        }
 }
 
-
-static void nfs_mount_7_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       /* Dont want any more callbacks even if the socket is closed */
-       rpc->connect_cb = NULL;
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       if (rpc_nfs3_null_async(rpc, nfs_mount_8_cb, data) != 0) {
-               data->cb(-ENOMEM, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
-
 static void nfs_mount_6_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct nfs_cb_data *data = private_data;
@@ -700,13 +841,12 @@ static void nfs_mount_6_cb(struct rpc_context *rpc, int status, void *command_da
        memcpy(nfs->rootfh.data.data_val, res->mountres3_u.mountinfo.fhandle.fhandle3_val, nfs->rootfh.data.data_len);
 
        rpc_disconnect(rpc, "normal disconnect");
-       if (rpc_connect_async(rpc, nfs->server, 2049, nfs_mount_7_cb, data) != 0) {
+
+       if (rpc_connect_program_async(nfs->rpc, nfs->server, NFS_PROGRAM, NFS_V3, nfs_mount_8_cb, data) != 0) {
                data->cb(-ENOMEM, nfs, command_data, data->private_data);
                free_nfs_cb_data(data);
                return;
        }
-       /* NFS TCP connections we want to autoreconnect after sessions are torn down (due to inactivity or error) */
-       rpc_set_autoreconnect(rpc);
 }
 
 
@@ -735,123 +875,6 @@ static void nfs_mount_5_cb(struct rpc_context *rpc, int status, void *command_da
        }
 }
 
-static void nfs_mount_4_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       /* Dont want any more callbacks even if the socket is closed */
-       rpc->connect_cb = NULL;
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       if (rpc_mount3_null_async(rpc, nfs_mount_5_cb, data) != 0) {
-               data->cb(-ENOMEM, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
-static void nfs_mount_3_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-       uint32_t mount_port;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       if (status == RPC_STATUS_ERROR) {       
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       mount_port = *(uint32_t *)command_data;
-       if (mount_port == 0) {
-               rpc_set_error(rpc, "RPC error. Mount program is not available on %s", nfs->server);
-               data->cb(-ENOENT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       rpc_disconnect(rpc, "normal disconnect");
-       if (rpc_connect_async(rpc, nfs->server, mount_port, nfs_mount_4_cb, data) != 0) {
-               data->cb(-ENOMEM, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
-
-static void nfs_mount_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       if (rpc_pmap_getport_async(rpc, MOUNT_PROGRAM, MOUNT_V3, IPPROTO_TCP, nfs_mount_3_cb, private_data) != 0) {
-               data->cb(-ENOMEM, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
-static void nfs_mount_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       /* Dont want any more callbacks even if the socket is closed */
-       rpc->connect_cb = NULL;
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       if (rpc_pmap_null_async(rpc, nfs_mount_2_cb, data) != 0) {
-               data->cb(-ENOMEM, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
 /*
  * Async call for mounting an nfs share and geting the root filehandle
  */
@@ -880,7 +903,7 @@ int nfs_mount_async(struct nfs_context *nfs, const char *server, const char *exp
        data->cb           = cb;
        data->private_data = private_data;
 
-       if (rpc_connect_async(nfs->rpc, server, 111, nfs_mount_1_cb, data) != 0) {
+       if (rpc_connect_program_async(nfs->rpc, server, MOUNT_PROGRAM, MOUNT_V3, nfs_mount_5_cb, data) != 0) {
                rpc_set_error(nfs->rpc, "Failed to start connection");
                free_nfs_cb_data(data);
                return -1;
@@ -895,11 +918,12 @@ int nfs_mount_async(struct nfs_context *nfs, const char *server, const char *exp
  * Functions to first look up a path, component by component, and then finally call a specific function once
  * the filehandle for the final component is found.
  */
-static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+static void nfs_lookup_path_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
-       LOOKUP3res *res;
+       READLINK3res *res;
+       char *path, *newpath;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -916,34 +940,158 @@ static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *comm
 
        res = command_data;
        if (res->status != NFS3_OK) {
-               rpc_set_error(nfs->rpc, "NFS: Lookup of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               rpc_set_error(nfs->rpc, "NFS: READLINK of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
                data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
                free_nfs_cb_data(data);
                return;
        }
 
-       if (nfs_lookup_path_async_internal(nfs, data, &res->LOOKUP3res_u.resok.object) != 0) {
-               rpc_set_error(nfs->rpc, "Failed to create lookup pdu");
-               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-}
-
-static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb_data *data, struct nfs_fh3 *fh)
-{
-       char *path, *str;
-       LOOKUP3args args;
+       path = res->READLINK3res_u.resok.data;
 
-       while (*data->path == '/') {
-             data->path++;
-       }
+       /* Handle absolute paths, ensuring that the path lies within the
+        * export. */
+       if (path[0] == '/') {
+               if (strstr(path, nfs->export) == path) {
+                       char *ptr = path + strlen(nfs->export);
+                       if (*ptr == '/') {
+                               newpath = strdup(ptr);
+                       } else if (*ptr == '\0') {
+                               newpath = strdup("/");
+                       } else {
+                               data->cb(-ENOENT, nfs, "Symbolic link points outside export", data->private_data);
+                               free_nfs_cb_data(data);
+                               return;
+                       }
+               } else {
+                       data->cb(-ENOENT, nfs, "Symbolic link points outside export", data->private_data);
+                       free_nfs_cb_data(data);
+                       return;
+               }
+
+               if (!newpath)
+                       goto nomem;
+       } else {
+               /* Handle relative paths, both the case where the current
+                * component is an intermediate component and when it is the
+                * final component. */
+               if (data->path[0]) {
+                       /* Since path points to a component and saved_path
+                        * always starts with '/', path[-1] is valid. */
+                       data->path[-1] = '\0';
+                       newpath = malloc(strlen(data->saved_path) + strlen(path) + strlen(data->path) + 6);
+                       if (!newpath)
+                               goto nomem;
+
+                       sprintf(newpath, "%s/../%s/%s", data->saved_path, path, data->path);
+               } else {
+                       newpath = malloc(strlen(data->saved_path) + strlen(path) + 5);
+                       if (!newpath)
+                               goto nomem;
+
+                       sprintf(newpath, "%s/../%s", data->saved_path, path);
+               }
+       }
+       free(data->saved_path);
+       data->saved_path = newpath;
+
+       if (nfs_normalize_path(nfs, data->saved_path) != 0) {
+               data->cb(-ENOENT, nfs, "Symbolic link resolves to invalid path", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       data->path = data->saved_path;
+       nfs_lookup_path_async_internal(nfs, NULL, data, &nfs->rootfh);
+       return;
+
+nomem:
+       data->cb(-ENOMEM, nfs, "Failed to allocate memory for path", data->private_data);
+       free_nfs_cb_data(data);
+}
+
+static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       LOOKUP3res *res;
+       fattr3 *attr;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: Lookup of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       attr = res->LOOKUP3res_u.resok.obj_attributes.attributes_follow ?
+         &res->LOOKUP3res_u.resok.obj_attributes.post_op_attr_u.attributes :
+         NULL;
+
+       /* This function will always invoke the callback and cleanup
+        * for failures. So no need to check the return value.
+        */
+       nfs_lookup_path_async_internal(nfs, attr, data, &res->LOOKUP3res_u.resok.object);
+}
+
+static int nfs_lookup_path_async_internal(struct nfs_context *nfs, fattr3 *attr, struct nfs_cb_data *data, struct nfs_fh3 *fh)
+{
+       char *path, *slash;
+       LOOKUP3args args;
+
+       while (*data->path == '/') {
+             data->path++;
+       }
 
        path = data->path;
-       str = strchr(path, '/');
-       if (str != NULL) {
-               *str = 0;
-               data->path = str+1;
+       slash = strchr(path, '/');
+
+       if (attr && attr->type == NF3LNK && (!data->no_follow || *path != '\0')) {
+               READLINK3args args;
+
+               if (data->link_count++ >= MAX_LINK_COUNT) {
+                       data->cb(-ELOOP, nfs, "Too many levels of symbolic links", data->private_data);
+                       free_nfs_cb_data(data);
+                       return -1;
+               }
+
+               args.symlink = *fh;
+
+               if (rpc_nfs3_readlink_async(nfs->rpc, nfs_lookup_path_2_cb, &args, data) != 0) {
+                       rpc_set_error(nfs->rpc, "RPC error: Failed to send READLINK call for %s", data->path);
+                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+                       free_nfs_cb_data(data);
+                       return -1;
+               }
+
+               if (slash != NULL) {
+                       *slash = '/';
+               }
+               return 0;
+       }
+
+       if (slash != NULL) {
+               /* Clear slash so that path is a zero terminated string for
+                * the current path component. Set it back to '/' again later
+                * when we are finished referencing this component so that
+                * data->saved_path will still point to the full
+                * normalized path.
+                */
+               *slash = 0;
+               data->path = slash+1;
        } else {
                while (*data->path != 0) {
                      data->path++;
@@ -960,11 +1108,13 @@ static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb
                        return -1;
                }
                memcpy(data->fh.data.data_val, fh->data.data_val, data->fh.data.data_len);
-               data->continue_cb(nfs, data);
+               if (slash != NULL) {
+                       *slash = '/';
+               }
+               data->continue_cb(nfs, attr, data);
                return 0;
        }
 
-
        memset(&args, 0, sizeof(LOOKUP3args));
        args.what.dir = *fh;
        args.what.name = path;
@@ -975,21 +1125,162 @@ static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb
                free_nfs_cb_data(data);
                return -1;
        }
+       if (slash != NULL) {
+               *slash = '/';
+       }
        return 0;
 }
 
-static int nfs_lookuppath_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data, continue_func continue_cb, void *continue_data, void (*free_continue_data)(void *), int continue_int)
+static int nfs_normalize_path(struct nfs_context *nfs, char *path)
 {
-       struct nfs_cb_data *data;
+       char *str;
+       int len;
 
-       if (path[0] != 0 && path[0] != '/') {
-               rpc_set_error(nfs->rpc, "Pathname is not absolute %s", path);
+       /* // -> / */
+       while ((str = strstr(path, "//"))) {
+               while(*str) {
+                       *str = *(str + 1);
+                       str++;
+               }
+       }
+
+       /* /./ -> / */
+       while ((str = strstr(path, "/./"))) {
+               while(*(str + 1)) {
+                       *str = *(str + 2);
+                       str++;
+               }
+       }
+
+       /* ^/../ -> error */
+       if (!strncmp(path, "/../", 4)) {
+               rpc_set_error(nfs->rpc,
+                       "Absolute path starts with '/../' "
+                       "during normalization");
+               return -1;
+       }
+
+       /* ^[^/] -> error */
+       if (path[0] != '/') {
+               rpc_set_error(nfs->rpc,
+                       "Absolute path does not start with '/'");
                return -1;
        }
 
+       /* /string/../ -> / */
+       while ((str = strstr(path, "/../"))) {
+               char *tmp;
+
+               if (!strncmp(path, "/../", 4)) {
+                       rpc_set_error(nfs->rpc,
+                               "Absolute path starts with '/../' "
+                               "during normalization");
+                       return -1;
+               }
+
+               tmp = str - 1;
+               while (*tmp != '/') {
+                       tmp--;
+               }
+               str += 3;
+               while((*(tmp++) = *(str++)) != '\0')
+                       ;
+       }
+
+       /* /$ -> \0 */
+       len = strlen(path);
+       if (len > 1) {
+               if (path[len - 1] == '/') {
+                       path[len - 1] = '\0';
+                       len--;
+               }
+       }
+       if (path[0] == '\0') {
+               rpc_set_error(nfs->rpc,
+                       "Absolute path became '' "
+                       "during normalization");
+               return -1;
+       }
+
+       /* /.$ -> \0 */
+       if (len >= 2) {
+               if (!strcmp(&path[len - 2], "/.")) {
+                       path[len - 2] = '\0';
+                       len -= 2;
+               }
+       }
+
+       /* ^/..$ -> error */
+       if (!strcmp(path, "/..")) {
+               rpc_set_error(nfs->rpc,
+                       "Absolute path is '/..' "
+                       "during normalization");
+               return -1;
+       }
+
+       /* /string/..$ -> / */
+       if (len >= 3) {
+               if (!strcmp(&path[len - 3], "/..")) {
+                       char *tmp = &path[len - 3];
+                       while (*--tmp != '/')
+                               ;
+                       *tmp = '\0';
+               }
+       }
+
+       return 0;
+}
+
+static void nfs_lookup_path_getattr_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       GETATTR3res *res;
+       fattr3 *attr;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: GETATTR of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       attr = &res->GETATTR3res_u.resok.obj_attributes;
+       /* This function will always invoke the callback and cleanup
+        * for failures. So no need to check the return value.
+        */
+       nfs_lookup_path_async_internal(nfs, attr, data, &nfs->rootfh);
+}
+
+static int nfs_lookuppath_async(struct nfs_context *nfs, const char *path, int no_follow, nfs_cb cb, void *private_data, continue_func continue_cb, void *continue_data, void (*free_continue_data)(void *), int continue_int)
+{
+       struct nfs_cb_data *data;
+       struct GETATTR3args args;
+
+       if (path[0] == '\0') {
+               path = ".";
+       }
+
        data = malloc(sizeof(struct nfs_cb_data));
        if (data == NULL) {
-               rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
+               rpc_set_error(nfs->rpc, "out of memory: failed to allocate "
+                       "nfs_cb_data structure");
+               if (free_continue_data)
+                       free_continue_data(continue_data);
                return -1;
        }
        memset(data, 0, sizeof(struct nfs_cb_data));
@@ -1000,34 +1291,74 @@ static int nfs_lookuppath_async(struct nfs_context *nfs, const char *path, nfs_c
        data->free_continue_data = free_continue_data;
        data->continue_int       = continue_int;
        data->private_data       = private_data;
-       data->saved_path         = strdup(path);
+       data->no_follow          = no_follow;
+       if (path[0] == '/') {
+               data->saved_path = strdup(path);
+       } else {
+               data->saved_path = malloc(strlen(path) + strlen(nfs->cwd) + 2);
+               if (data->saved_path == NULL) {
+                       rpc_set_error(nfs->rpc, "out of memory: failed to "
+                               "malloc path string");
+                       free_nfs_cb_data(data);
+                       return -1;
+               }
+               sprintf(data->saved_path, "%s/%s", nfs->cwd, path);
+       }
+
        if (data->saved_path == NULL) {
                rpc_set_error(nfs->rpc, "out of memory: failed to copy path string");
                free_nfs_cb_data(data);
                return -1;
        }
-       data->path = data->saved_path;
+       if (nfs_normalize_path(nfs, data->saved_path) != 0) {
+               free_nfs_cb_data(data);
+               return -1;
+       }
 
-       if (nfs_lookup_path_async_internal(nfs, data, &nfs->rootfh) != 0) {
-               /* return 0 here since the callback will be invoked if there is a failure */
+       data->path = data->saved_path;
+       if (data->path[0]) {
+               /* This function will always invoke the callback and cleanup
+                * for failures. So no need to check the return value.
+                */
+               nfs_lookup_path_async_internal(nfs, NULL, data, &nfs->rootfh);
                return 0;
        }
+
+       /* We have a request for "", so just perform a GETATTR3 so we can
+        * return the attributes to the caller.
+        */
+       memset(&args, 0, sizeof(GETATTR3args));
+       args.object = nfs->rootfh;
+       if (rpc_nfs3_getattr_async(nfs->rpc, nfs_lookup_path_getattr_cb, &args, data) != 0) {
+               free_nfs_cb_data(data);
+               return -1;
+       }
        return 0;
 }
 
 
-
-
-
 /*
  * Async stat()
  */
+static dev_t specdata3_to_rdev(struct specdata3 *rdev)
+{
+#ifdef makedev
+       return makedev(rdev->specdata1, rdev->specdata2);
+#else
+       return 0;
+#endif
+}
+
 static void nfs_stat_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        GETATTR3res *res;
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
+#ifdef WIN32
+  struct __stat64 st;
+#else
        struct stat st;
+#endif
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -1050,33 +1381,55 @@ static void nfs_stat_1_cb(struct rpc_context *rpc, int status, void *command_dat
                return;
        }
 
-        st.st_dev     = -1;
+       st.st_dev     = res->GETATTR3res_u.resok.obj_attributes.fsid;
         st.st_ino     = res->GETATTR3res_u.resok.obj_attributes.fileid;
         st.st_mode    = res->GETATTR3res_u.resok.obj_attributes.mode;
-       if (res->GETATTR3res_u.resok.obj_attributes.type == NF3DIR) {
-               st.st_mode |= S_IFDIR ;
-       }
-       if (res->GETATTR3res_u.resok.obj_attributes.type == NF3REG) {
-               st.st_mode |= S_IFREG ;
+       switch (res->GETATTR3res_u.resok.obj_attributes.type) {
+       case NF3REG:
+               st.st_mode |= S_IFREG;
+               break;
+       case NF3DIR:
+               st.st_mode |= S_IFDIR;
+               break;
+       case NF3BLK:
+               st.st_mode |= S_IFBLK;
+               break;
+       case NF3CHR:
+               st.st_mode |= S_IFCHR;
+               break;
+       case NF3LNK:
+               st.st_mode |= S_IFLNK;
+               break;
+       case NF3SOCK:
+               st.st_mode |= S_IFSOCK;
+               break;
+       case NF3FIFO:
+               st.st_mode |= S_IFIFO;
+               break;
        }
         st.st_nlink   = res->GETATTR3res_u.resok.obj_attributes.nlink;
         st.st_uid     = res->GETATTR3res_u.resok.obj_attributes.uid;
         st.st_gid     = res->GETATTR3res_u.resok.obj_attributes.gid;
-        st.st_rdev    = 0;
+       st.st_rdev    = specdata3_to_rdev(&res->GETATTR3res_u.resok.obj_attributes.rdev);
         st.st_size    = res->GETATTR3res_u.resok.obj_attributes.size;
 #ifndef WIN32
-        st.st_blksize = 4096;
-        st.st_blocks  = res->GETATTR3res_u.resok.obj_attributes.size / 4096;
-#endif//WIN32        
+        st.st_blksize = NFS_BLKSIZE;
+       st.st_blocks  = (res->GETATTR3res_u.resok.obj_attributes.used + 512 - 1) / 512;
+#endif//WIN32
         st.st_atime   = res->GETATTR3res_u.resok.obj_attributes.atime.seconds;
         st.st_mtime   = res->GETATTR3res_u.resok.obj_attributes.mtime.seconds;
         st.st_ctime   = res->GETATTR3res_u.resok.obj_attributes.ctime.seconds;
+#ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
+       st.st_atim.tv_nsec = res->GETATTR3res_u.resok.obj_attributes.atime.nseconds;
+       st.st_mtim.tv_nsec = res->GETATTR3res_u.resok.obj_attributes.mtime.nseconds;
+       st.st_ctim.tv_nsec = res->GETATTR3res_u.resok.obj_attributes.ctime.nseconds;
+#endif
 
        data->cb(0, nfs, &st, data->private_data);
        free_nfs_cb_data(data);
 }
 
-static int nfs_stat_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_stat_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct GETATTR3args args;
 
@@ -1094,7 +1447,7 @@ static int nfs_stat_continue_internal(struct nfs_context *nfs, struct nfs_cb_dat
 
 int nfs_stat_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_stat_continue_internal, NULL, NULL, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_stat_continue_internal, NULL, NULL, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -1103,12 +1456,173 @@ int nfs_stat_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *p
 }
 
 
+/*
+ * Async nfs_stat64()
+ */
+static void nfs_stat64_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       GETATTR3res *res;
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       struct nfs_stat_64 st;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: GETATTR of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       st.nfs_dev     = res->GETATTR3res_u.resok.obj_attributes.fsid;
+        st.nfs_ino     = res->GETATTR3res_u.resok.obj_attributes.fileid;
+        st.nfs_mode    = res->GETATTR3res_u.resok.obj_attributes.mode;
+       switch (res->GETATTR3res_u.resok.obj_attributes.type) {
+       case NF3REG:
+               st.nfs_mode |= S_IFREG;
+               break;
+       case NF3DIR:
+               st.nfs_mode |= S_IFDIR;
+               break;
+       case NF3BLK:
+               st.nfs_mode |= S_IFBLK;
+               break;
+       case NF3CHR:
+               st.nfs_mode |= S_IFCHR;
+               break;
+       case NF3LNK:
+               st.nfs_mode |= S_IFLNK;
+               break;
+       case NF3SOCK:
+               st.nfs_mode |= S_IFSOCK;
+               break;
+       case NF3FIFO:
+               st.nfs_mode |= S_IFIFO;
+               break;
+       }
+        st.nfs_nlink   = res->GETATTR3res_u.resok.obj_attributes.nlink;
+        st.nfs_uid     = res->GETATTR3res_u.resok.obj_attributes.uid;
+        st.nfs_gid     = res->GETATTR3res_u.resok.obj_attributes.gid;
+       st.nfs_rdev    = specdata3_to_rdev(&res->GETATTR3res_u.resok.obj_attributes.rdev);
+        st.nfs_size    = res->GETATTR3res_u.resok.obj_attributes.size;
+       st.nfs_blksize = NFS_BLKSIZE;
+       st.nfs_blocks  = (res->GETATTR3res_u.resok.obj_attributes.used + 512 - 1) / 512;
+        st.nfs_atime   = res->GETATTR3res_u.resok.obj_attributes.atime.seconds;
+        st.nfs_mtime   = res->GETATTR3res_u.resok.obj_attributes.mtime.seconds;
+        st.nfs_ctime   = res->GETATTR3res_u.resok.obj_attributes.ctime.seconds;
+       st.nfs_atime_nsec = res->GETATTR3res_u.resok.obj_attributes.atime.nseconds;
+       st.nfs_mtime_nsec = res->GETATTR3res_u.resok.obj_attributes.mtime.nseconds;
+       st.nfs_ctime_nsec = res->GETATTR3res_u.resok.obj_attributes.ctime.nseconds;
+       st.nfs_used    = res->GETATTR3res_u.resok.obj_attributes.used;
+
+       data->cb(0, nfs, &st, data->private_data);
+       free_nfs_cb_data(data);
+}
+
+static int nfs_stat64_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
+{
+       struct GETATTR3args args;
+
+       memset(&args, 0, sizeof(GETATTR3args));
+       args.object = data->fh;
+
+       if (rpc_nfs3_getattr_async(nfs->rpc, nfs_stat64_1_cb, &args, data) != 0) {
+               rpc_set_error(nfs->rpc, "RPC error: Failed to send STAT GETATTR call for %s", data->path);
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return -1;
+       }
+       return 0;
+}
+
+int nfs_stat64_async_internal(struct nfs_context *nfs, const char *path, int no_follow, nfs_cb cb, void *private_data)
+{
+       if (nfs_lookuppath_async(nfs, path, no_follow, cb, private_data, nfs_stat64_continue_internal, NULL, NULL, 0) != 0) {
+               rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
+               return -1;
+       }
+
+       return 0;
+}
+
+int nfs_stat64_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
+{
+       return nfs_stat64_async_internal(nfs, path, 0, cb, private_data);
+}
+
+int nfs_lstat64_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
+{
+       return nfs_stat64_async_internal(nfs, path, 1, cb, private_data);
+}
+
+/*
+ * Async open()
+ */
+static void nfs_open_trunc_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       struct nfsfh *nfsfh;
+       SETATTR3res *res;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: Setattr failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       nfsfh = malloc(sizeof(struct nfsfh));
+       if (nfsfh == NULL) {
+               rpc_set_error(nfs->rpc, "NFS: Failed to allocate nfsfh structure");
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       memset(nfsfh, 0, sizeof(struct nfsfh));
+
+       if (data->continue_int & O_SYNC) {
+               nfsfh->is_sync = 1;
+       }
+       if (data->continue_int & O_APPEND) {
+               nfsfh->is_append = 1;
+       }
 
+       /* steal the filehandle */
+       nfsfh->fh = data->fh;
+       data->fh.data.data_val = NULL;
 
+       data->cb(0, nfs, nfsfh, data->private_data);
+       free_nfs_cb_data(data);
+}
 
-/*
- * Async open()
- */
 static void nfs_open_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        ACCESS3res *res;
@@ -1162,6 +1676,28 @@ static void nfs_open_cb(struct rpc_context *rpc, int status, void *command_data,
                return;
        }
 
+       /* Try to truncate it if we were requested to */
+       if ((data->continue_int & O_TRUNC) &&
+           (data->continue_int & (O_RDWR|O_WRONLY))) {
+               SETATTR3args args;
+
+               memset(&args, 0, sizeof(SETATTR3args));
+               args.object = data->fh;
+               args.new_attributes.size.set_it = 1;
+               args.new_attributes.size.set_size3_u.size = 0;
+
+               if (rpc_nfs3_setattr_async(nfs->rpc, nfs_open_trunc_cb, &args,
+                               data) != 0) {
+                       rpc_set_error(nfs->rpc, "RPC error: Failed to send "
+                               "SETATTR call for %s", data->path);
+                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc),
+                               data->private_data);
+                       free_nfs_cb_data(data);
+                       return;
+               }
+               return;
+       }
+
        nfsfh = malloc(sizeof(struct nfsfh));
        if (nfsfh == NULL) {
                rpc_set_error(nfs->rpc, "NFS: Failed to allocate nfsfh structure");
@@ -1174,6 +1710,9 @@ static void nfs_open_cb(struct rpc_context *rpc, int status, void *command_data,
        if (data->continue_int & O_SYNC) {
                nfsfh->is_sync = 1;
        }
+       if (data->continue_int & O_APPEND) {
+               nfsfh->is_append = 1;
+       }
 
        /* steal the filehandle */
        nfsfh->fh = data->fh;
@@ -1183,7 +1722,7 @@ static void nfs_open_cb(struct rpc_context *rpc, int status, void *command_data,
        free_nfs_cb_data(data);
 }
 
-static int nfs_open_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_open_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        int nfsmode = 0;
        ACCESS3args args;
@@ -1203,17 +1742,19 @@ static int nfs_open_continue_internal(struct nfs_context *nfs, struct nfs_cb_dat
        args.access = nfsmode;
 
        if (rpc_nfs3_access_async(nfs->rpc, nfs_open_cb, &args, data) != 0) {
-               rpc_set_error(nfs->rpc, "RPC error: Failed to send OPEN ACCESS call for %s", data->path);
-               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               rpc_set_error(nfs->rpc, "RPC error: Failed to send OPEN ACCESS "
+                               "call for %s", data->path);
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc),
+                               data->private_data);
                free_nfs_cb_data(data);
                return -1;
        }
        return 0;
 }
 
-int nfs_open_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb cb, void *private_data)
+int nfs_open_async(struct nfs_context *nfs, const char *path, int flags, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_open_continue_internal, NULL, NULL, mode) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_open_continue_internal, NULL, NULL, flags) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -1222,42 +1763,42 @@ int nfs_open_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb c
 }
 
 
-
-
-
 /*
- * Async pread()
+ * Async chdir()
  */
-static void nfs_pread_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+static int nfs_chdir_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-       READ3res *res;
+       /* steal saved_path */
+       free(nfs->cwd);
+       nfs->cwd = data->saved_path;
+       data->saved_path = NULL;
 
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+       data->cb(0, nfs, NULL, data->private_data);
+       free_nfs_cb_data(data);
 
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
+       return 0;
+}
 
-       res = command_data;
-       if (res->status != NFS3_OK) {
-               rpc_set_error(nfs->rpc, "NFS: Read failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
-               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
-               free_nfs_cb_data(data);
-               return;
+int nfs_chdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
+{
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_chdir_continue_internal, NULL, NULL, 0) != 0) {
+               rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
+               return -1;
        }
 
-       data->nfsfh->offset += res->READ3res_u.resok.count;
-       data->cb(res->READ3res_u.resok.count, nfs, res->READ3res_u.resok.data.data_val, data->private_data);
-       free_nfs_cb_data(data);
+       return 0;
+}
+
+
+/*
+ * Async pread()
+ */
+static void nfs_fill_READ3args(READ3args *args, struct nfsfh *fh, uint64_t offset, uint64_t count)
+{
+       memset(args, 0, sizeof(READ3args));
+       args->file = fh->fh;
+       args->offset = offset;
+       args->count = count;
 }
 
 static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
@@ -1280,49 +1821,117 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
                data->cancel = 1;
        }
 
-       /* reassemble the data into the buffer */
        if (status == RPC_STATUS_SUCCESS) {
                res = command_data;
                if (res->status != NFS3_OK) {
                        rpc_set_error(nfs->rpc, "NFS: Read failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
                        data->error = 1;
-               } else  {
-                       if (res->READ3res_u.resok.count > 0) {
-                               memcpy(&data->buffer[mdata->offset - data->start_offset], res->READ3res_u.resok.data.data_val, res->READ3res_u.resok.count);
-                               if ((unsigned)data->max_offset < mdata->offset + res->READ3res_u.resok.count) {
-                                       data->max_offset = mdata->offset + res->READ3res_u.resok.count;
+               } else {
+                       uint64_t count = res->READ3res_u.resok.count;
+
+                       if (mdata->update_pos)
+                               data->nfsfh->offset += count;
+
+                       /* if we have more than one call or we have received a short read we need a reassembly buffer */
+                       if (data->num_calls || (count < mdata->count && !res->READ3res_u.resok.eof)) {
+                               if (data->buffer == NULL) {
+                                       data->buffer =  malloc(data->count);
+                                       if (data->buffer == NULL) {
+                                               rpc_set_error(nfs->rpc, "Out-Of-Memory: Failed to allocate reassembly buffer for %d bytes", (int)data->count);
+                                               data->oom = 1;
+                                       }
+                               }
+                       }
+                       if (count > 0) {
+                               if (count <= mdata->count) {
+                                       /* copy data into reassembly buffer if we have one */
+                                       if (data->buffer != NULL) {
+                                               memcpy(&data->buffer[mdata->offset - data->offset], res->READ3res_u.resok.data.data_val, count);
+                                       }
+                                       if (data->max_offset < mdata->offset + count) {
+                                               data->max_offset = mdata->offset + count;
+                                       }
+                               } else {
+                                       rpc_set_error(nfs->rpc, "NFS: Read overflow. Server has sent more data than requested!");
+                                       data->error = 1;
+                               }
+                       }
+                       /* check if we have received a short read */
+                       if (count < mdata->count && !res->READ3res_u.resok.eof) {
+                               if (count == 0) {
+                                       rpc_set_error(nfs->rpc, "NFS: Read failed. No bytes read and not at EOF!");
+                                       data->error = 1;
+                               } else {
+                                       /* reissue reminder of this read request */
+                                       READ3args args;
+                                       mdata->offset += count;
+                                       mdata->count -= count;
+                                       nfs_fill_READ3args(&args, data->nfsfh, mdata->offset, mdata->count);
+                                       if (rpc_nfs3_read_async(nfs->rpc, nfs_pread_mcb, &args, mdata) == 0) {
+                                               data->num_calls++;
+                                               return;
+                                       } else {
+                                               rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
+                                               data->oom = 1;
+                                       }
                                }
                        }
                }
        }
 
+       free(mdata);
+
        if (data->num_calls > 0) {
                /* still waiting for more replies */
-               free(mdata);
                return;
        }
-
+       if (data->oom != 0) {
+               data->cb(-ENOMEM, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
        if (data->error != 0) {
                data->cb(-EFAULT, nfs, command_data, data->private_data);
                free_nfs_cb_data(data);
-               free(mdata);
                return;
        }
        if (data->cancel != 0) {
                data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
                free_nfs_cb_data(data);
-               free(mdata);
                return;
        }
 
-       data->nfsfh->offset = data->max_offset;
-       data->cb(data->max_offset - data->start_offset, nfs, data->buffer, data->private_data);
+       if (data->buffer) {
+               if (data->max_offset > data->org_offset + data->org_count) {
+                       data->max_offset = data->org_offset + data->org_count;
+               }
+               data->cb(data->max_offset - data->org_offset, nfs, data->buffer + (data->org_offset - data->offset), data->private_data);
+       } else {
+               data->cb(res->READ3res_u.resok.count, nfs, res->READ3res_u.resok.data.data_val, data->private_data);
+       }
 
+       data->nfsfh->ra.fh_offset = data->max_offset;
+       if (data->nfsfh->ra.cur_ra) {
+               free(data->nfsfh->ra.buf);
+               data->nfsfh->ra.buf = data->buffer;
+               data->nfsfh->ra.buf_offset = data->offset;
+               data->nfsfh->ra.buf_count = data->count;
+               data->nfsfh->ra.buf_ts = time(NULL);
+               data->buffer = NULL;
+       }
        free_nfs_cb_data(data);
-       free(mdata);
 }
 
-int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, nfs_cb cb, void *private_data)
+static void nfs_ra_invalidate(struct nfsfh *nfsfh) {
+       free(nfsfh->ra.buf);
+       nfsfh->ra.buf = NULL;
+       nfsfh->ra.buf_offset = 0;
+       nfsfh->ra.buf_count = 0;
+       nfsfh->ra.buf_ts = time(NULL);
+       nfsfh->ra.cur_ra = NFS_BLKSIZE;
+}
+
+static int nfs_pread_async_internal(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, nfs_cb cb, void *private_data, int update_pos)
 {
        struct nfs_cb_data *data;
 
@@ -1336,42 +1945,79 @@ int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offse
        data->cb           = cb;
        data->private_data = private_data;
        data->nfsfh        = nfsfh;
+       data->org_offset   = offset;
+       data->org_count    = count;
 
-       nfsfh->offset = offset;
+       assert(data->num_calls == 0);
 
-       if (count <= nfs_get_readmax(nfs)) {
-               READ3args args;
+       if (nfs->rpc->readahead && time(NULL) - nfsfh->ra.buf_ts > NFS_RA_TIMEOUT) {
+               /* readahead cache timeout */
+               nfs_ra_invalidate(nfsfh);
+       }
+
+       if (nfs->rpc->readahead) {
+               if (offset >= nfsfh->ra.last_offset &&
+                       offset - NFS_BLKSIZE <= nfsfh->ra.fh_offset + nfsfh->ra.cur_ra) {
+                       if (nfs->rpc->readahead > nfsfh->ra.cur_ra) {
+                               nfsfh->ra.cur_ra <<= 1;
+                       }
+               } else {
+                       nfsfh->ra.cur_ra = NFS_BLKSIZE;
+               }
 
-               memset(&args, 0, sizeof(READ3args));
-               args.file = nfsfh->fh;
-               args.offset = offset;
-               args.count = count;
+               nfsfh->ra.last_offset = offset;
 
-               if (rpc_nfs3_read_async(nfs->rpc, nfs_pread_cb, &args, data) != 0) {
-                       rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               if (nfsfh->ra.buf_offset <= offset &&
+                       nfsfh->ra.buf_offset + nfsfh->ra.buf_count >= offset + count) {
+                       /* serve request completely from cache */
+                       data->buffer = malloc(count);
+                       if (data->buffer == NULL) {
+                               free_nfs_cb_data(data);
+                               return -ENOMEM;
+                       }
+                       memcpy(data->buffer, nfsfh->ra.buf + (offset - nfsfh->ra.buf_offset), count);
+                       data->cb(count, nfs, data->buffer, data->private_data);
+                       nfsfh->ra.fh_offset = offset + count;
                        free_nfs_cb_data(data);
-                       return -1;
+                       return 0;
                }
-               return 0;
-       }
 
-       /* trying to read more than maximum server read size, we has to chop it up into smaller
-        * reads and collect into a reassembly buffer.
-        * we send all reads in parallel so that performance is still good.
-        */
-       data->max_offset = offset;
-       data->start_offset = offset;
+               /* align start offset to blocksize */
+               count += offset & (NFS_BLKSIZE - 1);
+               offset &= ~(NFS_BLKSIZE - 1);
 
-       data->buffer =  malloc(count);
-       if (data->buffer == NULL) {
-               rpc_set_error(nfs->rpc, "Out-Of-Memory: Failed to allocate reassembly buffer for %d bytes", (int)count);
-               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
-               free_nfs_cb_data(data);
-               return -1;
+               /* align end offset to blocksize and add readahead */
+               count += nfsfh->ra.cur_ra - 1;
+               count &= ~(NFS_BLKSIZE - 1);
+
+               data->buffer = malloc(count);
+               if (data->buffer == NULL) {
+                       free_nfs_cb_data(data);
+                       return -ENOMEM;
+               }
+               data->offset = offset;
+               data->count = count;
+
+               if (nfsfh->ra.buf_count && nfsfh->ra.buf_offset <= offset &&
+                       nfsfh->ra.buf_offset + nfsfh->ra.buf_count >= offset) {
+                       /* serve request partially from cache */
+                       size_t overlap = (nfsfh->ra.buf_offset + nfsfh->ra.buf_count) - offset;
+                       if (overlap > count) count = overlap;
+                       memcpy(data->buffer, nfsfh->ra.buf + (offset - nfsfh->ra.buf_offset), overlap);
+                       offset += overlap;
+                       count -= overlap;
+               }
+       } else {
+               data->offset = offset;
+               data->count = count;
        }
 
-       while (count > 0) {
+       data->max_offset = offset;
+
+       /* chop requests into chunks of at most READMAX bytes if necessary.
+        * we send all reads in parallel so that performance is still good.
+        */
+       do {
                uint64_t readcount = count;
                struct nfs_mcb_data *mdata;
                READ3args args;
@@ -1383,39 +2029,51 @@ int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offse
                mdata = malloc(sizeof(struct nfs_mcb_data));
                if (mdata == NULL) {
                        rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_mcb_data structure");
-                       return -1;
+                       if (data->num_calls == 0) {
+                               free_nfs_cb_data(data);
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
                memset(mdata, 0, sizeof(struct nfs_mcb_data));
                mdata->data   = data;
                mdata->offset = offset;
                mdata->count  = readcount;
+               mdata->update_pos = update_pos;
 
-               memset(&args, 0, sizeof(READ3args));
-               args.file = nfsfh->fh;
-               args.offset = offset;
-               args.count = readcount;
+               nfs_fill_READ3args(&args, nfsfh, offset, readcount);
 
                if (rpc_nfs3_read_async(nfs->rpc, nfs_pread_mcb, &args, mdata) != 0) {
                        rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                        free(mdata);
-                       return -1;
+                       if (data->num_calls == 0) {
+                               free_nfs_cb_data(data);
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
 
                count               -= readcount;
                offset              += readcount;
                data->num_calls++;
-        }
+        } while (count > 0);
 
         return 0;
 }
 
+int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, nfs_cb cb, void *private_data)
+{
+       return nfs_pread_async_internal(nfs, nfsfh, offset, count, cb, private_data, 0);
+}
+
 /*
  * Async read()
  */
 int nfs_read_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t count, nfs_cb cb, void *private_data)
 {
-       return nfs_pread_async(nfs, nfsfh, nfsfh->offset, count, cb, private_data);
+       return nfs_pread_async_internal(nfs, nfsfh, nfsfh->offset, count, cb, private_data, 1);
 }
 
 
@@ -1423,36 +2081,16 @@ int nfs_read_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t count,
 /*
  * Async pwrite()
  */
-static void nfs_pwrite_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+static void nfs_fill_WRITE3args (WRITE3args *args, struct nfsfh *fh, uint64_t offset, uint64_t count,
+                                 void *buf)
 {
-       struct nfs_cb_data *data = private_data;
-       struct nfs_context *nfs = data->nfs;
-       WRITE3res *res;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(-EFAULT, nfs, command_data, data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       res = command_data;
-       if (res->status != NFS3_OK) {
-               rpc_set_error(nfs->rpc, "NFS: Write failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
-               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
-               free_nfs_cb_data(data);
-               return;
-       }
-
-       data->nfsfh->offset += res->WRITE3res_u.resok.count;
-       data->cb(res->WRITE3res_u.resok.count, nfs, NULL, data->private_data);
-       free_nfs_cb_data(data);
+       memset(args, 0, sizeof(WRITE3args));
+       args->file = fh->fh;
+       args->offset = offset;
+       args->count  = count;
+       args->stable = fh->is_sync ? FILE_SYNC : UNSTABLE;
+       args->data.data_len = count;
+       args->data.data_val = buf;
 }
 
 static void nfs_pwrite_mcb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
@@ -1481,42 +2119,69 @@ static void nfs_pwrite_mcb(struct rpc_context *rpc, int status, void *command_da
                        rpc_set_error(nfs->rpc, "NFS: Write failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
                        data->error = 1;
                } else  {
-                       if (res->WRITE3res_u.resok.count > 0) {
-                               if ((unsigned)data->max_offset < mdata->offset + res->WRITE3res_u.resok.count) {
-                                       data->max_offset = mdata->offset + res->WRITE3res_u.resok.count;
+                       uint64_t count = res->WRITE3res_u.resok.count;
+
+                       if (mdata->update_pos)
+                               data->nfsfh->offset += count;
+
+                       if (count < mdata->count) {
+                               if (count == 0) {
+                                       rpc_set_error(nfs->rpc, "NFS: Write failed. No bytes written!");
+                                       data->error = 1;
+                               } else {
+                                       /* reissue reminder of this write request */
+                                       WRITE3args args;
+                                       mdata->offset += count;
+                                       mdata->count -= count;
+
+                                       nfs_fill_WRITE3args(&args, data->nfsfh, mdata->offset, mdata->count,
+                                                                               &data->usrbuf[mdata->offset - data->offset]);
+                                       if (rpc_nfs3_write_async(nfs->rpc, nfs_pwrite_mcb, &args, mdata) == 0) {
+                                               data->num_calls++;
+                                               return;
+                                       } else {
+                                               rpc_set_error(nfs->rpc, "RPC error: Failed to send WRITE call for %s", data->path);
+                                               data->oom = 1;
+                                       }
+                               }
+                       }
+                       if (count > 0) {
+                               if (data->max_offset < mdata->offset + count) {
+                                       data->max_offset = mdata->offset + count;
                                }
                        }
                }
        }
 
+       free(mdata);
+
        if (data->num_calls > 0) {
                /* still waiting for more replies */
-               free(mdata);
                return;
        }
-
+       if (data->oom != 0) {
+               data->cb(-ENOMEM, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
        if (data->error != 0) {
                data->cb(-EFAULT, nfs, command_data, data->private_data);
                free_nfs_cb_data(data);
-               free(mdata);
                return;
        }
        if (data->cancel != 0) {
                data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
                free_nfs_cb_data(data);
-               free(mdata);
                return;
        }
 
-       data->nfsfh->offset = data->max_offset;
-       data->cb(data->max_offset - data->start_offset, nfs, NULL, data->private_data);
+       data->cb(data->max_offset - data->offset, nfs, NULL, data->private_data);
 
        free_nfs_cb_data(data);
-       free(mdata);
 }
 
 
-int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, char *buf, nfs_cb cb, void *private_data)
+static int nfs_pwrite_async_internal(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, char *buf, nfs_cb cb, void *private_data, int update_pos)
 {
        struct nfs_cb_data *data;
 
@@ -1530,37 +2195,18 @@ int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offs
        data->cb           = cb;
        data->private_data = private_data;
        data->nfsfh        = nfsfh;
+       data->usrbuf       = buf;
 
-       nfsfh->offset = offset;
-
-       if (count <= nfs_get_writemax(nfs)) {
-               WRITE3args args;
-
-               memset(&args, 0, sizeof(WRITE3args));
-               args.file = nfsfh->fh;
-               args.offset = offset;
-               args.count  = count;
-               args.stable = nfsfh->is_sync?FILE_SYNC:UNSTABLE;
-               args.data.data_len = count;
-               args.data.data_val = buf;
+       /* hello, clang-analyzer */
+       assert(data->num_calls == 0);
 
-               if (rpc_nfs3_write_async(nfs->rpc, nfs_pwrite_cb, &args, data) != 0) {
-                       rpc_set_error(nfs->rpc, "RPC error: Failed to send WRITE call for %s", data->path);
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
-                       free_nfs_cb_data(data);
-                       return -1;
-               }
-               return 0;
-       }
-
-       /* trying to write more than maximum server write size, we has to chop it up into smaller
-        * chunks.
+       /* chop requests into chunks of at most WRITEMAX bytes if necessary.
         * we send all writes in parallel so that performance is still good.
         */
        data->max_offset = offset;
-       data->start_offset = offset;
+       data->offset = offset;
 
-       while (count > 0) {
+       do {
                uint64_t writecount = count;
                struct nfs_mcb_data *mdata;
                WRITE3args args;
@@ -1572,42 +2218,114 @@ int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offs
                mdata = malloc(sizeof(struct nfs_mcb_data));
                if (mdata == NULL) {
                        rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_mcb_data structure");
-                       return -1;
+                       if (data->num_calls == 0) {
+                               free_nfs_cb_data(data);
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
                memset(mdata, 0, sizeof(struct nfs_mcb_data));
                mdata->data   = data;
                mdata->offset = offset;
                mdata->count  = writecount;
+               mdata->update_pos = update_pos;
 
-               memset(&args, 0, sizeof(WRITE3args));
-               args.file = nfsfh->fh;
-               args.offset = offset;
-               args.count  = writecount;
-               args.stable = nfsfh->is_sync?FILE_SYNC:UNSTABLE;
-               args.data.data_len = writecount;
-               args.data.data_val = &buf[offset - data->start_offset];
+               nfs_fill_WRITE3args(&args, nfsfh, offset, writecount, &buf[offset - data->offset]);
 
                if (rpc_nfs3_write_async(nfs->rpc, nfs_pwrite_mcb, &args, mdata) != 0) {
                        rpc_set_error(nfs->rpc, "RPC error: Failed to send WRITE call for %s", data->path);
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                        free(mdata);
-                       return -1;
+                       if (data->num_calls == 0) {
+                               free_nfs_cb_data(data);
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
 
                count               -= writecount;
                offset              += writecount;
                data->num_calls++;
-       }
+       } while (count > 0);
 
        return 0;
 }
 
+int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, char *buf, nfs_cb cb, void *private_data)
+{
+       return nfs_pwrite_async_internal(nfs, nfsfh, offset, count, buf, cb, private_data, 0);
+}
+
 /*
  * Async write()
  */
+static void nfs_write_append_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       GETATTR3res *res;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: GETATTR failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+
+       if (nfs_pwrite_async_internal(nfs, data->nfsfh, res->GETATTR3res_u.resok.obj_attributes.size, data->count, data->usrbuf, data->cb, data->private_data, 1) != 0) {
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return;
+       }
+       free_nfs_cb_data(data);
+}
+
 int nfs_write_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t count, char *buf, nfs_cb cb, void *private_data)
 {
-       return nfs_pwrite_async(nfs, nfsfh, nfsfh->offset, count, buf, cb, private_data);
+       nfs_ra_invalidate(nfsfh);
+       if (nfsfh->is_append) {
+               struct GETATTR3args args;
+               struct nfs_cb_data *data;
+
+               data = malloc(sizeof(struct nfs_cb_data));
+               if (data == NULL) {
+                       rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
+                       return -1;
+               }
+               memset(data, 0, sizeof(struct nfs_cb_data));
+               data->nfs           = nfs;
+               data->cb            = cb;
+               data->private_data  = private_data;
+               data->nfsfh         = nfsfh;
+               data->usrbuf        = buf;
+               data->count         = count;
+
+               memset(&args, 0, sizeof(GETATTR3args));
+               args.object = nfsfh->fh;
+
+               if (rpc_nfs3_getattr_async(nfs->rpc, nfs_write_append_cb, &args, data) != 0) {
+                       rpc_set_error(nfs->rpc, "out of memory: failed to send GETATTR");
+                       free_nfs_cb_data(data);
+                       return -1;
+               }
+               return 0;
+       }
+       return nfs_pwrite_async_internal(nfs, nfsfh, nfsfh->offset, count, buf, cb, private_data, 1);
 }
 
 
@@ -1616,27 +2334,52 @@ int nfs_write_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t count
 /*
  * close
  */
+
 int nfs_close_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, void *private_data)
 {
-       if (nfsfh->fh.data.data_val != NULL){
-               free(nfsfh->fh.data.data_val);
-               nfsfh->fh.data.data_val = NULL;
+       free_nfsfh(nfsfh);
+       cb(0, nfs, NULL, private_data);
+       return 0;
+};
+
+
+
+
+
+/*
+ * Async fstat()
+ */
+int nfs_fstat_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, void *private_data)
+{
+       struct nfs_cb_data *data;
+       struct GETATTR3args args;
+
+       data = malloc(sizeof(struct nfs_cb_data));
+       if (data == NULL) {
+               rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
+               return -1;
        }
-       free(nfsfh);
+       memset(data, 0, sizeof(struct nfs_cb_data));
+       data->nfs          = nfs;
+       data->cb           = cb;
+       data->private_data = private_data;
 
-       cb(0, nfs, NULL, private_data);
+       memset(&args, 0, sizeof(GETATTR3args));
+       args.object = nfsfh->fh;
+
+       if (rpc_nfs3_getattr_async(nfs->rpc, nfs_stat_1_cb, &args, data) != 0) {
+               rpc_set_error(nfs->rpc, "RPC error: Failed to send STAT GETATTR call for %s", data->path);
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return -1;
+       }
        return 0;
-};
-
-
-
-
+}
 
 /*
- * Async fstat()
+ * Async fstat64()
  */
-int nfs_fstat_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, void *private_data)
+int nfs_fstat64_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, void *private_data)
 {
        struct nfs_cb_data *data;
        struct GETATTR3args args;
@@ -1654,7 +2397,7 @@ int nfs_fstat_async(struct nfs_context *nfs, struct nfsfh *nfsfh, nfs_cb cb, voi
        memset(&args, 0, sizeof(GETATTR3args));
        args.object = nfsfh->fh;
 
-       if (rpc_nfs3_getattr_async(nfs->rpc, nfs_stat_1_cb, &args, data) != 0) {
+       if (rpc_nfs3_getattr_async(nfs->rpc, nfs_stat64_1_cb, &args, data) != 0) {
                rpc_set_error(nfs->rpc, "RPC error: Failed to send STAT GETATTR call for %s", data->path);
                data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                free_nfs_cb_data(data);
@@ -1796,7 +2539,7 @@ int nfs_ftruncate_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t l
 /*
  * Async truncate()
  */
-static int nfs_truncate_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_truncate_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        uint64_t offset = data->continue_int;
        struct nfsfh nfsfh;
@@ -1819,7 +2562,7 @@ int nfs_truncate_async(struct nfs_context *nfs, const char *path, uint64_t lengt
 
        offset = length;
 
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_truncate_continue_internal, NULL, NULL, offset) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_truncate_continue_internal, NULL, NULL, offset) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -1839,7 +2582,7 @@ static void nfs_mkdir_cb(struct rpc_context *rpc, int status, void *command_data
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        char *str = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        str = &str[strlen(str) + 1];
@@ -1867,7 +2610,7 @@ static void nfs_mkdir_cb(struct rpc_context *rpc, int status, void *command_data
        free_nfs_cb_data(data);
 }
 
-static int nfs_mkdir_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_mkdir_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        char *str = data->continue_data;
        MKDIR3args args;
@@ -1902,13 +2645,14 @@ int nfs_mkdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *
 
        ptr = strrchr(new_path, '/');
        if (ptr == NULL) {
+               free(new_path);
                rpc_set_error(nfs->rpc, "Invalid path %s", path);
                return -1;
        }
        *ptr = 0;
 
        /* new_path now points to the parent directory,  and beyond the nul terminateor is the new directory to create */
-       if (nfs_lookuppath_async(nfs, new_path, cb, private_data, nfs_mkdir_continue_internal, new_path, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, new_path, 0, cb, private_data, nfs_mkdir_continue_internal, new_path, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path component");
                return -1;
        }
@@ -1929,7 +2673,7 @@ static void nfs_rmdir_cb(struct rpc_context *rpc, int status, void *command_data
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        char *str = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        str = &str[strlen(str) + 1];
@@ -1957,7 +2701,7 @@ static void nfs_rmdir_cb(struct rpc_context *rpc, int status, void *command_data
        free_nfs_cb_data(data);
 }
 
-static int nfs_rmdir_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_rmdir_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        char *str = data->continue_data;
        RMDIR3args args;
@@ -1988,13 +2732,14 @@ int nfs_rmdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *
 
        ptr = strrchr(new_path, '/');
        if (ptr == NULL) {
+               free(new_path);
                rpc_set_error(nfs->rpc, "Invalid path %s", path);
                return -1;
        }
        *ptr = 0;
 
        /* new_path now points to the parent directory,  and beyond the nul terminateor is the new directory to create */
-       if (nfs_lookuppath_async(nfs, new_path, cb, private_data, nfs_rmdir_continue_internal, new_path, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, new_path, 0, cb, private_data, nfs_rmdir_continue_internal, new_path, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -2008,13 +2753,63 @@ int nfs_rmdir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *
 /*
  * Async creat()
  */
+struct create_cb_data {
+       char *path;
+       int flags;
+       int mode;
+};
+
+static void free_create_cb_data(void *ptr)
+{
+       struct create_cb_data *data = ptr;
+
+       free(data->path);
+       free(data);
+}
+
+static void nfs_create_trunc_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+       struct nfs_cb_data *data = private_data;
+       struct nfs_context *nfs = data->nfs;
+       struct nfsfh *nfsfh;
+       SETATTR3res *res;
+
+       assert(rpc->magic == RPC_CONTEXT_MAGIC);
+
+       if (status == RPC_STATUS_ERROR) {
+               data->cb(-EFAULT, nfs, command_data, data->private_data);
+               free_nfs_cb_data(data);
+               free_nfsfh(nfsfh);
+               return;
+       }
+       if (status == RPC_STATUS_CANCEL) {
+               data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+               free_nfs_cb_data(data);
+               free_nfsfh(nfsfh);
+               return;
+       }
+
+       res = command_data;
+       if (res->status != NFS3_OK) {
+               rpc_set_error(nfs->rpc, "NFS: Setattr failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+               data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               free_nfsfh(nfsfh);
+               return;
+       }
+
+       data->cb(0, nfs, data->nfsfh, data->private_data);
+       free_nfs_cb_data(data);
+}
+
 static void nfs_create_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        LOOKUP3res *res;
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        struct nfsfh *nfsfh;
-       char *str = data->continue_data;
+       struct create_cb_data *cb_data = data->continue_data;
+       char *str = cb_data->path;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -2047,23 +2842,62 @@ static void nfs_create_2_cb(struct rpc_context *rpc, int status, void *command_d
        }
        memset(nfsfh, 0, sizeof(struct nfsfh));
 
+       if (cb_data->flags & O_SYNC) {
+               nfsfh->is_sync = 1;
+       }
+       if (cb_data->flags & O_APPEND) {
+               nfsfh->is_append = 1;
+       }
+
        /* copy the filehandle */
        nfsfh->fh.data.data_len = res->LOOKUP3res_u.resok.object.data.data_len;
        nfsfh->fh.data.data_val = malloc(nfsfh->fh.data.data_len);
+       if (nfsfh->fh.data.data_val == NULL) {
+               rpc_set_error(nfs->rpc, "Out of memory: Failed to allocate fh structure");
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               free(nfsfh);
+               return;
+       }
        memcpy(nfsfh->fh.data.data_val, res->LOOKUP3res_u.resok.object.data.data_val, nfsfh->fh.data.data_len);
 
+       /* Try to truncate it if we were requested to */
+       if (cb_data->flags & O_TRUNC) {
+               SETATTR3args args;
+
+               data->nfsfh = nfsfh;
+
+               memset(&args, 0, sizeof(SETATTR3args));
+               args.object = nfsfh->fh;
+               args.new_attributes.size.set_it = 1;
+               args.new_attributes.size.set_size3_u.size = 0;
+
+               if (rpc_nfs3_setattr_async(nfs->rpc, nfs_create_trunc_cb,
+                               &args, data) != 0) {
+                       rpc_set_error(nfs->rpc, "RPC error: Failed to send "
+                               "SETATTR call for %s", data->path);
+                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc),
+                               data->private_data);
+                       free_nfs_cb_data(data);
+                       free_nfsfh(nfsfh);
+                       return;
+               }
+               return;
+       }
+
        data->cb(0, nfs, nfsfh, data->private_data);
        free_nfs_cb_data(data);
 }
 
 
 
-static void nfs_creat_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+static void nfs_create_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        CREATE3res *res;
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
-       char *str = data->continue_data;
+       struct create_cb_data *cb_data = data->continue_data;
+       char *str = cb_data->path;
        LOOKUP3args args;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
@@ -2101,9 +2935,10 @@ static void nfs_creat_1_cb(struct rpc_context *rpc, int status, void *command_da
        return;
 }
 
-static int nfs_creat_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_create_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
-       char *str = data->continue_data;
+       struct create_cb_data *cb_data = data->continue_data;
+       char *str = cb_data->path;
        CREATE3args args;
 
        str = &str[strlen(str) + 1];
@@ -2111,11 +2946,11 @@ static int nfs_creat_continue_internal(struct nfs_context *nfs, struct nfs_cb_da
        memset(&args, 0, sizeof(CREATE3args));
        args.where.dir = data->fh;
        args.where.name = str;
-       args.how.mode = UNCHECKED;
+       args.how.mode = (cb_data->flags & O_EXCL) ? GUARDED : UNCHECKED;
        args.how.createhow3_u.obj_attributes.mode.set_it = 1;
-       args.how.createhow3_u.obj_attributes.mode.set_mode3_u.mode = data->continue_int;
+       args.how.createhow3_u.obj_attributes.mode.set_mode3_u.mode = cb_data->mode;
 
-       if (rpc_nfs3_create_async(nfs->rpc, nfs_creat_1_cb, &args, data) != 0) {
+       if (rpc_nfs3_create_async(nfs->rpc, nfs_create_1_cb, &args, data) != 0) {
                rpc_set_error(nfs->rpc, "RPC error: Failed to send CREATE call for %s/%s", data->path, str);
                data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                free_nfs_cb_data(data);
@@ -2124,26 +2959,37 @@ static int nfs_creat_continue_internal(struct nfs_context *nfs, struct nfs_cb_da
        return 0;
 }
 
-int nfs_creat_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb cb, void *private_data)
+int nfs_create_async(struct nfs_context *nfs, const char *path, int flags, int mode, nfs_cb cb, void *private_data)
 {
-       char *new_path;
+       struct create_cb_data *cb_data;
        char *ptr;
 
-       new_path = strdup(path);
-       if (new_path == NULL) {
+       cb_data = malloc(sizeof(struct create_cb_data));
+       if (cb_data == NULL) {
+               rpc_set_error(nfs->rpc, "Out of memory, failed to allocate mode buffer for cb data");
+               return -1;
+       }
+
+       cb_data->path = strdup(path);
+       if (cb_data->path == NULL) {
                rpc_set_error(nfs->rpc, "Out of memory, failed to allocate mode buffer for path");
+               free(cb_data);
                return -1;
        }
 
-       ptr = strrchr(new_path, '/');
+       ptr = strrchr(cb_data->path, '/');
        if (ptr == NULL) {
                rpc_set_error(nfs->rpc, "Invalid path %s", path);
+               free_create_cb_data(cb_data);
                return -1;
        }
        *ptr = 0;
 
+       cb_data->flags = flags;
+       cb_data->mode = mode;
+
        /* new_path now points to the parent directory,  and beyond the nul terminator is the new directory to create */
-       if (nfs_lookuppath_async(nfs, new_path, cb, private_data, nfs_creat_continue_internal, new_path, free, mode) != 0) {
+       if (nfs_lookuppath_async(nfs, cb_data->path, 0, cb, private_data, nfs_create_continue_internal, cb_data, free_create_cb_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -2151,6 +2997,11 @@ int nfs_creat_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb
        return 0;
 }
 
+int nfs_creat_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb cb, void *private_data)
+{
+       return nfs_create_async(nfs, path, 0, mode, cb, private_data);
+}
+
 
 
 
@@ -2163,7 +3014,7 @@ static void nfs_unlink_cb(struct rpc_context *rpc, int status, void *command_dat
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        char *str = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        str = &str[strlen(str) + 1];
@@ -2191,7 +3042,7 @@ static void nfs_unlink_cb(struct rpc_context *rpc, int status, void *command_dat
        free_nfs_cb_data(data);
 }
 
-static int nfs_unlink_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_unlink_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        char *str = data->continue_data;
        struct REMOVE3args args;
@@ -2222,13 +3073,14 @@ int nfs_unlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void
 
        ptr = strrchr(new_path, '/');
        if (ptr == NULL) {
+               free(new_path);
                rpc_set_error(nfs->rpc, "Invalid path %s", path);
                return -1;
        }
        *ptr = 0;
 
        /* new_path now points to the parent directory,  and beyond the nul terminateor is the new directory to create */
-       if (nfs_lookuppath_async(nfs, new_path, cb, private_data, nfs_unlink_continue_internal, new_path, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, new_path, 0, cb, private_data, nfs_unlink_continue_internal, new_path, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -2261,7 +3113,7 @@ static void nfs_mknod_cb(struct rpc_context *rpc, int status, void *command_data
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        char *str = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        str = &str[strlen(str) + 1];
@@ -2289,12 +3141,12 @@ static void nfs_mknod_cb(struct rpc_context *rpc, int status, void *command_data
        free_nfs_cb_data(data);
 }
 
-static int nfs_mknod_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_mknod_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct mknod_cb_data *cb_data = data->continue_data;
        char *str = cb_data->path;
        MKNOD3args args;
-       
+
        str = &str[strlen(str) + 1];
 
        args.where.dir = data->fh;
@@ -2352,13 +3204,14 @@ int nfs_mknod_async(struct nfs_context *nfs, const char *path, int mode, int dev
        cb_data->path = strdup(path);
        if (cb_data->path == NULL) {
                rpc_set_error(nfs->rpc, "Out of memory, failed to allocate mode buffer for path");
-               free(cb_data);          
+               free(cb_data);
                return -1;
        }
 
        ptr = strrchr(cb_data->path, '/');
        if (ptr == NULL) {
                rpc_set_error(nfs->rpc, "Invalid path %s", path);
+               free_mknod_cb_data(cb_data);
                return -1;
        }
        *ptr = 0;
@@ -2368,9 +3221,8 @@ int nfs_mknod_async(struct nfs_context *nfs, const char *path, int mode, int dev
        cb_data->minor = minor(dev);
 
        /* data->path now points to the parent directory,  and beyond the nul terminateor is the new directory to create */
-       if (nfs_lookuppath_async(nfs, cb_data->path, cb, private_data, nfs_mknod_continue_internal, cb_data, free_mknod_cb_data, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, cb_data->path, 0, cb, private_data, nfs_mknod_continue_internal, cb_data, free_mknod_cb_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
-               free_mknod_cb_data(cb_data);
                return -1;
        }
 
@@ -2412,14 +3264,15 @@ static void nfs_opendir3_cb(struct rpc_context *rpc, int status, void *command_d
        rdpe_cb_data->getattrcount--;
 
        if (status == RPC_STATUS_ERROR) {
+               rpc_set_error(nfs->rpc, "LOOKUP during READDIRPLUS emulation "
+                             "failed with RPC_STATUS_ERROR");
                rdpe_cb_data->status = RPC_STATUS_ERROR;
        }
        if (status == RPC_STATUS_CANCEL) {
+               rpc_set_error(nfs->rpc, "LOOKUP during READDIRPLUS emulation "
+                             "failed with RPC_STATUS_CANCEL");
                rdpe_cb_data->status = RPC_STATUS_CANCEL;
        }
-       if (status == RPC_STATUS_SUCCESS && res->status != NFS3_OK) {
-               rdpe_cb_data->status = RPC_STATUS_ERROR;
-       }
        if (status == RPC_STATUS_SUCCESS && res->status == NFS3_OK) {
                if (res->LOOKUP3res_u.resok.obj_attributes.attributes_follow) {
                        fattr3 *attributes = &res->LOOKUP3res_u.resok.obj_attributes.post_op_attr_u.attributes;
@@ -2430,16 +3283,30 @@ static void nfs_opendir3_cb(struct rpc_context *rpc, int status, void *command_d
 
                        nfsdirent->atime.tv_sec  = attributes->atime.seconds;
                        nfsdirent->atime.tv_usec = attributes->atime.nseconds/1000;
+                       nfsdirent->atime_nsec = attributes->atime.nseconds;
                        nfsdirent->mtime.tv_sec  = attributes->mtime.seconds;
                        nfsdirent->mtime.tv_usec = attributes->mtime.nseconds/1000;
+                       nfsdirent->mtime_nsec = attributes->mtime.nseconds;
                        nfsdirent->ctime.tv_sec  = attributes->ctime.seconds;
                        nfsdirent->ctime.tv_usec = attributes->ctime.nseconds/1000;
+                       nfsdirent->ctime_nsec = attributes->ctime.nseconds;
+                       nfsdirent->uid = attributes->uid;
+                       nfsdirent->gid = attributes->gid;
+                       nfsdirent->nlink = attributes->nlink;
+                       nfsdirent->dev = attributes->fsid;
+                       nfsdirent->rdev = specdata3_to_rdev(&attributes->rdev);
+                       nfsdirent->blksize = NFS_BLKSIZE;
+                       nfsdirent->blocks = (attributes->used + 512 - 1) / 512;
+                       nfsdirent->used = attributes->used;
                }
        }
 
        if (rdpe_cb_data->getattrcount == 0) {
                if (rdpe_cb_data->status != RPC_STATUS_SUCCESS) {
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+                       rpc_set_error(nfs->rpc, "READDIRPLUS emulation "
+                             "failed: %s", rpc_get_error(rpc));
+                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc),
+                               data->private_data);
                        nfs_free_nfsdir(nfsdir);
                } else {
                        data->cb(0, nfs, nfsdir, data->private_data);
@@ -2459,9 +3326,9 @@ static void nfs_opendir2_cb(struct rpc_context *rpc, int status, void *command_d
        struct nfsdir *nfsdir = data->continue_data;
        struct nfsdirent *nfsdirent;
        struct entry3 *entry;
-       uint64_t cookie;
+       uint64_t cookie = 0;
        struct rdpe_cb_data *rdpe_cb_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        if (status == RPC_STATUS_ERROR) {
@@ -2503,6 +3370,7 @@ static void nfs_opendir2_cb(struct rpc_context *rpc, int status, void *command_d
                nfsdirent->name = strdup(entry->name);
                if (nfsdirent->name == NULL) {
                        data->cb(-ENOMEM, nfs, "Failed to allocate dirent->name", data->private_data);
+                       free(nfsdirent);
                        nfs_free_nfsdir(nfsdir);
                        data->continue_data = NULL;
                        free_nfs_cb_data(data);
@@ -2536,50 +3404,57 @@ static void nfs_opendir2_cb(struct rpc_context *rpc, int status, void *command_d
                return;
        }
 
+       if (res->READDIR3res_u.resok.dir_attributes.attributes_follow)
+               nfsdir->attr = res->READDIR3res_u.resok.dir_attributes.post_op_attr_u.attributes;
+
        /* steal the dirhandle */
        nfsdir->current = nfsdir->entries;
 
-       rdpe_cb_data = malloc(sizeof(struct rdpe_cb_data));
-       rdpe_cb_data->getattrcount = 0;
-       rdpe_cb_data->status = RPC_STATUS_SUCCESS;
-       rdpe_cb_data->data = data;
-       for (nfsdirent = nfsdir->entries; nfsdirent; nfsdirent = nfsdirent->next) {
-               struct rdpe_lookup_cb_data *rdpe_lookup_cb_data;
-               LOOKUP3args args;
-
-               rdpe_lookup_cb_data = malloc(sizeof(struct rdpe_lookup_cb_data));
-               rdpe_lookup_cb_data->rdpe_cb_data = rdpe_cb_data;
-               rdpe_lookup_cb_data->nfsdirent = nfsdirent;
-
-               memset(&args, 0, sizeof(LOOKUP3args));
-               args.what.dir = data->fh;
-               args.what.name = nfsdirent->name;
-
-               if (rpc_nfs3_lookup_async(nfs->rpc, nfs_opendir3_cb, &args, rdpe_lookup_cb_data) != 0) {
-                       rpc_set_error(nfs->rpc, "RPC error: Failed to send READDIR LOOKUP call");
-
-                       /* if we have already commands in flight, we cant just stop, we have to wait for the
-                        * commands in flight to complete
-                        */
-                       if (rdpe_cb_data->getattrcount > 0) {
-                               rdpe_cb_data->status = RPC_STATUS_ERROR;
+       if (nfsdir->entries) {
+               rdpe_cb_data = malloc(sizeof(struct rdpe_cb_data));
+               rdpe_cb_data->getattrcount = 0;
+               rdpe_cb_data->status = RPC_STATUS_SUCCESS;
+               rdpe_cb_data->data = data;
+               for (nfsdirent = nfsdir->entries; nfsdirent; nfsdirent = nfsdirent->next) {
+                       struct rdpe_lookup_cb_data *rdpe_lookup_cb_data;
+                       LOOKUP3args args;
+
+                       rdpe_lookup_cb_data = malloc(sizeof(struct rdpe_lookup_cb_data));
+                       rdpe_lookup_cb_data->rdpe_cb_data = rdpe_cb_data;
+                       rdpe_lookup_cb_data->nfsdirent = nfsdirent;
+
+                       memset(&args, 0, sizeof(LOOKUP3args));
+                       args.what.dir = data->fh;
+                       args.what.name = nfsdirent->name;
+
+                       if (rpc_nfs3_lookup_async(nfs->rpc, nfs_opendir3_cb, &args, rdpe_lookup_cb_data) != 0) {
+                               rpc_set_error(nfs->rpc, "RPC error: Failed to send READDIR LOOKUP call");
+
+                               /* if we have already commands in flight, we cant just stop, we have to wait for the
+                                * commands in flight to complete
+                                */
+                               if (rdpe_cb_data->getattrcount > 0) {
+                                       nfs_free_nfsdir(nfsdir);
+                                       data->continue_data = NULL;
+                                       free_nfs_cb_data(data);
+                                       rdpe_cb_data->status = RPC_STATUS_ERROR;
+                                       free(rdpe_lookup_cb_data);
+                                       return;
+                               }
+
+                               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+                               nfs_free_nfsdir(nfsdir);
+                               data->continue_data = NULL;
+                               free_nfs_cb_data(data);
                                free(rdpe_lookup_cb_data);
+                               free(rdpe_cb_data);
                                return;
                        }
-
-                       data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
-                       nfs_free_nfsdir(nfsdir);
-                       data->continue_data = NULL;
-                       free_nfs_cb_data(data);
-                       free(rdpe_lookup_cb_data);
-                       free(rdpe_cb_data);
-                       return;
+                       rdpe_cb_data->getattrcount++;
                }
-               rdpe_cb_data->getattrcount++;
        }
 }
 
-
 static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        READDIRPLUS3res *res = command_data;
@@ -2587,8 +3462,8 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
        struct nfs_context *nfs = data->nfs;
        struct nfsdir *nfsdir = data->continue_data;
        struct entryplus3 *entry;
-       uint64_t cookie;
-       
+       uint64_t cookie = 0;
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        if (status == RPC_STATUS_ERROR || (status == RPC_STATUS_SUCCESS && res->status == NFS3ERR_NOTSUPP) ){
@@ -2643,6 +3518,7 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
                nfsdirent->name = strdup(entry->name);
                if (nfsdirent->name == NULL) {
                        data->cb(-ENOMEM, nfs, "Failed to allocate dirent->name", data->private_data);
+                       free(nfsdirent);
                        nfs_free_nfsdir(nfsdir);
                        data->continue_data = NULL;
                        free_nfs_cb_data(data);
@@ -2656,10 +3532,21 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
 
                        nfsdirent->atime.tv_sec  = entry->name_attributes.post_op_attr_u.attributes.atime.seconds;
                        nfsdirent->atime.tv_usec = entry->name_attributes.post_op_attr_u.attributes.atime.nseconds/1000;
+                       nfsdirent->atime_nsec = entry->name_attributes.post_op_attr_u.attributes.atime.nseconds;
                        nfsdirent->mtime.tv_sec  = entry->name_attributes.post_op_attr_u.attributes.mtime.seconds;
                        nfsdirent->mtime.tv_usec = entry->name_attributes.post_op_attr_u.attributes.mtime.nseconds/1000;
+                       nfsdirent->mtime_nsec = entry->name_attributes.post_op_attr_u.attributes.mtime.nseconds;
                        nfsdirent->ctime.tv_sec  = entry->name_attributes.post_op_attr_u.attributes.ctime.seconds;
                        nfsdirent->ctime.tv_usec = entry->name_attributes.post_op_attr_u.attributes.ctime.nseconds/1000;
+                       nfsdirent->ctime_nsec = entry->name_attributes.post_op_attr_u.attributes.ctime.nseconds;
+                       nfsdirent->uid = entry->name_attributes.post_op_attr_u.attributes.uid;
+                       nfsdirent->gid = entry->name_attributes.post_op_attr_u.attributes.gid;
+                       nfsdirent->nlink = entry->name_attributes.post_op_attr_u.attributes.nlink;
+                       nfsdirent->dev = entry->name_attributes.post_op_attr_u.attributes.fsid;
+                       nfsdirent->rdev = specdata3_to_rdev(&entry->name_attributes.post_op_attr_u.attributes.rdev);
+                       nfsdirent->blksize = NFS_BLKSIZE;
+                       nfsdirent->blocks = (entry->name_attributes.post_op_attr_u.attributes.used + 512 - 1) / 512;
+                       nfsdirent->used = entry->name_attributes.post_op_attr_u.attributes.used;
                }
 
                nfsdirent->next  = nfsdir->entries;
@@ -2689,6 +3576,9 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
                return;
        }
 
+       if (res->READDIRPLUS3res_u.resok.dir_attributes.attributes_follow)
+               nfsdir->attr = res->READDIRPLUS3res_u.resok.dir_attributes.post_op_attr_u.attributes;
+
        /* steal the dirhandle */
        data->continue_data = NULL;
        nfsdir->current = nfsdir->entries;
@@ -2697,9 +3587,34 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
        free_nfs_cb_data(data);
 }
 
-static int nfs_opendir_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_opendir_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        READDIRPLUS3args args;
+       struct nfsdir *nfsdir = data->continue_data;;
+       struct nfsdir *cached;
+
+       cached = nfs_dircache_find(nfs, &data->fh);
+       if (cached) {
+               if (attr && attr->mtime.seconds == cached->attr.mtime.seconds) {
+                       cached->current = cached->entries;
+                       data->cb(0, nfs, cached, data->private_data);
+                       free_nfs_cb_data(data);
+                       return 0;
+               } else {
+                       /* cache must be stale */
+                       nfs_free_nfsdir(cached);
+               }
+       }
+
+       nfsdir->fh.data.data_len  = data->fh.data.data_len;
+       nfsdir->fh.data.data_val = malloc(nfsdir->fh.data.data_len);
+       if (nfsdir->fh.data.data_val == NULL) {
+               rpc_set_error(nfs->rpc, "OOM when allocating fh for nfsdir");
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return -1;
+       }
+       memcpy(nfsdir->fh.data.data_val, data->fh.data.data_val, data->fh.data.data_len);
 
        args.dir = data->fh;
        args.cookie = 0;
@@ -2726,7 +3641,7 @@ int nfs_opendir_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void
        }
        memset(nfsdir, 0, sizeof(struct nfsdir));
 
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_opendir_continue_internal, nfsdir, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_opendir_continue_internal, nfsdir, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -2746,15 +3661,24 @@ struct nfsdirent *nfs_readdir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir
 }
 
 
-void nfs_closedir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir)
+/*
+ * closedir()
+ */
+void nfs_closedir(struct nfs_context *nfs, struct nfsdir *nfsdir)
 {
-       nfs_free_nfsdir(nfsdir);
+       nfs_dircache_add(nfs, nfsdir);
 }
 
 
-
-
-
+/*
+ * getcwd()
+ */
+void nfs_getcwd(struct nfs_context *nfs, const char **cwd)
+{
+       if (cwd) {
+               *cwd = nfs->cwd;
+       }
+}
 
 
 /*
@@ -2763,7 +3687,7 @@ void nfs_closedir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir)
 struct lseek_cb_data {
        struct nfs_context *nfs;
        struct nfsfh *nfsfh;
-       uint64_t offset;
+       int64_t offset;
        nfs_cb cb;
        void *private_data;
 };
@@ -2773,6 +3697,7 @@ static void nfs_lseek_1_cb(struct rpc_context *rpc, int status, void *command_da
        GETATTR3res *res;
        struct lseek_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
+       uint64_t size = 0;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -2795,24 +3720,41 @@ static void nfs_lseek_1_cb(struct rpc_context *rpc, int status, void *command_da
                return;
        }
 
-       data->nfsfh->offset = data->offset + res->GETATTR3res_u.resok.obj_attributes.size;
-       data->cb(0, nfs, &data->nfsfh->offset, data->private_data);
+       size = res->GETATTR3res_u.resok.obj_attributes.size;
+
+       if (data->offset < 0 &&
+           (uint64_t)(-data->offset) > size) {
+               data->cb(-EINVAL, nfs, &data->nfsfh->offset, data->private_data);
+       } else {
+               data->nfsfh->offset = data->offset + size;
+               data->cb(0, nfs, &data->nfsfh->offset, data->private_data);
+       }
+
        free(data);
 }
 
-int nfs_lseek_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, int whence, nfs_cb cb, void *private_data)
+int nfs_lseek_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int64_t offset, int whence, nfs_cb cb, void *private_data)
 {
        struct lseek_cb_data *data;
        struct GETATTR3args args;
 
        if (whence == SEEK_SET) {
-               nfsfh->offset = offset;
-               cb(0, nfs, &nfsfh->offset, private_data);
+               if (offset < 0) {
+                       cb(-EINVAL, nfs, &nfsfh->offset, private_data);
+               } else {
+                       nfsfh->offset = offset;
+                       cb(0, nfs, &nfsfh->offset, private_data);
+               }
                return 0;
        }
        if (whence == SEEK_CUR) {
-               nfsfh->offset += offset;
-               cb(0, nfs, &nfsfh->offset, private_data);
+               if (offset < 0 &&
+                   nfsfh->offset < (uint64_t)(-offset)) {
+                       cb(-EINVAL, nfs, &nfsfh->offset, private_data);
+               } else {
+                       nfsfh->offset += offset;
+                       cb(0, nfs, &nfsfh->offset, private_data);
+               }
                return 0;
        }
 
@@ -2873,11 +3815,11 @@ static void nfs_statvfs_1_cb(struct rpc_context *rpc, int status, void *command_
                return;
        }
 
-       svfs.f_bsize   = 4096;
-       svfs.f_frsize  = 4096;
-       svfs.f_blocks  = res->FSSTAT3res_u.resok.tbytes/4096;
-       svfs.f_bfree   = res->FSSTAT3res_u.resok.fbytes/4096;
-       svfs.f_bavail  = res->FSSTAT3res_u.resok.abytes/4096;
+       svfs.f_bsize   = NFS_BLKSIZE;
+       svfs.f_frsize  = NFS_BLKSIZE;
+       svfs.f_blocks  = res->FSSTAT3res_u.resok.tbytes/NFS_BLKSIZE;
+       svfs.f_bfree   = res->FSSTAT3res_u.resok.fbytes/NFS_BLKSIZE;
+       svfs.f_bavail  = res->FSSTAT3res_u.resok.abytes/NFS_BLKSIZE;
        svfs.f_files   = res->FSSTAT3res_u.resok.tfiles;
        svfs.f_ffree   = res->FSSTAT3res_u.resok.ffiles;
 #if !defined(ANDROID)
@@ -2891,7 +3833,7 @@ static void nfs_statvfs_1_cb(struct rpc_context *rpc, int status, void *command_
        free_nfs_cb_data(data);
 }
 
-static int nfs_statvfs_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_statvfs_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        FSSTAT3args args;
 
@@ -2907,7 +3849,7 @@ static int nfs_statvfs_continue_internal(struct nfs_context *nfs, struct nfs_cb_
 
 int nfs_statvfs_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_statvfs_continue_internal, NULL, NULL, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_statvfs_continue_internal, NULL, NULL, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -2948,12 +3890,12 @@ static void nfs_readlink_1_cb(struct rpc_context *rpc, int status, void *command
                return;
        }
 
-       
+
        data->cb(0, nfs, res->READLINK3res_u.resok.data, data->private_data);
        free_nfs_cb_data(data);
 }
 
-static int nfs_readlink_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_readlink_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        READLINK3args args;
 
@@ -2970,7 +3912,7 @@ static int nfs_readlink_continue_internal(struct nfs_context *nfs, struct nfs_cb
 
 int nfs_readlink_async(struct nfs_context *nfs, const char *path, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_readlink_continue_internal, NULL, NULL, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 1, cb, private_data, nfs_readlink_continue_internal, NULL, NULL, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3015,7 +3957,7 @@ static void nfs_chmod_cb(struct rpc_context *rpc, int status, void *command_data
        free_nfs_cb_data(data);
 }
 
-static int nfs_chmod_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_chmod_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        SETATTR3args args;
 
@@ -3036,7 +3978,7 @@ static int nfs_chmod_continue_internal(struct nfs_context *nfs, struct nfs_cb_da
 
 int nfs_chmod_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_chmod_continue_internal, NULL, NULL, mode) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_chmod_continue_internal, NULL, NULL, mode) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3070,8 +4012,7 @@ int nfs_fchmod_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int mode, nfs
        }
        memcpy(data->fh.data.data_val, nfsfh->fh.data.data_val, data->fh.data.data_len);
 
-       if (nfs_chmod_continue_internal(nfs, data) != 0) {
-               free_nfs_cb_data(data);
+       if (nfs_chmod_continue_internal(nfs, NULL, data) != 0) {
                return -1;
        }
 
@@ -3119,7 +4060,7 @@ struct nfs_chown_data {
        gid_t gid;
 };
 
-static int nfs_chown_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_chown_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        SETATTR3args args;
        struct nfs_chown_data *chown_data = data->continue_data;
@@ -3145,7 +4086,7 @@ static int nfs_chown_continue_internal(struct nfs_context *nfs, struct nfs_cb_da
 }
 
 
-int nfs_chown_async(struct nfs_context *nfs, const char *path, int uid, int gid, nfs_cb cb, void *private_data)
+int nfs_chown_async_internal(struct nfs_context *nfs, const char *path, int no_follow, int uid, int gid, nfs_cb cb, void *private_data)
 {
        struct nfs_chown_data *chown_data;
 
@@ -3158,7 +4099,7 @@ int nfs_chown_async(struct nfs_context *nfs, const char *path, int uid, int gid,
        chown_data->uid = uid;
        chown_data->gid = gid;
 
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_chown_continue_internal, chown_data, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, no_follow, cb, private_data, nfs_chown_continue_internal, chown_data, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3166,6 +4107,15 @@ int nfs_chown_async(struct nfs_context *nfs, const char *path, int uid, int gid,
        return 0;
 }
 
+int nfs_chown_async(struct nfs_context *nfs, const char *path, int uid, int gid, nfs_cb cb, void *private_data)
+{
+       return nfs_chown_async_internal(nfs, path, 0, uid, gid, cb, private_data);
+}
+
+int nfs_lchown_async(struct nfs_context *nfs, const char *path, int uid, int gid, nfs_cb cb, void *private_data)
+{
+       return nfs_chown_async_internal(nfs, path, 1, uid, gid, cb, private_data);
+}
 
 /*
  * Async fchown()
@@ -3184,10 +4134,10 @@ int nfs_fchown_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int
        chown_data->uid = uid;
        chown_data->gid = gid;
 
-
        data = malloc(sizeof(struct nfs_cb_data));
        if (data == NULL) {
                rpc_set_error(nfs->rpc, "out of memory. failed to allocate memory for fchown data");
+               free(chown_data);
                return -1;
        }
        memset(data, 0, sizeof(struct nfs_cb_data));
@@ -3195,6 +4145,7 @@ int nfs_fchown_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int
        data->cb            = cb;
        data->private_data  = private_data;
        data->continue_data = chown_data;
+       data->free_continue_data = free;
        data->fh.data.data_len = nfsfh->fh.data.data_len;
        data->fh.data.data_val = malloc(data->fh.data.data_len);
        if (data->fh.data.data_val == NULL) {
@@ -3204,9 +4155,7 @@ int nfs_fchown_async(struct nfs_context *nfs, struct nfsfh *nfsfh, int uid, int
        }
        memcpy(data->fh.data.data_val, nfsfh->fh.data.data_val, data->fh.data.data_len);
 
-
-       if (nfs_chown_continue_internal(nfs, data) != 0) {
-               free_nfs_cb_data(data);
+       if (nfs_chown_continue_internal(nfs, NULL, data) != 0) {
                return -1;
        }
 
@@ -3251,7 +4200,7 @@ static void nfs_utimes_cb(struct rpc_context *rpc, int status, void *command_dat
        free_nfs_cb_data(data);
 }
 
-static int nfs_utimes_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_utimes_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        SETATTR3args args;
        struct timeval *utimes_data = data->continue_data;
@@ -3279,8 +4228,7 @@ static int nfs_utimes_continue_internal(struct nfs_context *nfs, struct nfs_cb_d
        return 0;
 }
 
-
-int nfs_utimes_async(struct nfs_context *nfs, const char *path, struct timeval *times, nfs_cb cb, void *private_data)
+int nfs_utimes_async_internal(struct nfs_context *nfs, const char *path, int no_follow, struct timeval *times, nfs_cb cb, void *private_data)
 {
        struct timeval *new_times = NULL;
 
@@ -3294,7 +4242,7 @@ int nfs_utimes_async(struct nfs_context *nfs, const char *path, struct timeval *
                memcpy(new_times, times, sizeof(struct timeval)*2);
        }
 
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_utimes_continue_internal, new_times, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, no_follow, cb, private_data, nfs_utimes_continue_internal, new_times, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3302,6 +4250,16 @@ int nfs_utimes_async(struct nfs_context *nfs, const char *path, struct timeval *
        return 0;
 }
 
+int nfs_utimes_async(struct nfs_context *nfs, const char *path, struct timeval *times, nfs_cb cb, void *private_data)
+{
+       return nfs_utimes_async_internal(nfs, path, 0, times, cb, private_data);
+}
+
+int nfs_lutimes_async(struct nfs_context *nfs, const char *path, struct timeval *times, nfs_cb cb, void *private_data)
+{
+       return nfs_utimes_async_internal(nfs, path, 1, times, cb, private_data);
+}
+
 /*
  * Async utime()
  */
@@ -3322,7 +4280,7 @@ int nfs_utime_async(struct nfs_context *nfs, const char *path, struct utimbuf *t
                new_times[1].tv_usec = 0;
        }
 
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_utimes_continue_internal, new_times, free, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_utimes_continue_internal, new_times, free, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3389,7 +4347,7 @@ static void nfs_access_cb(struct rpc_context *rpc, int status, void *command_dat
        free_nfs_cb_data(data);
 }
 
-static int nfs_access_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_access_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        int nfsmode = 0;
        ACCESS3args args;
@@ -3419,7 +4377,7 @@ static int nfs_access_continue_internal(struct nfs_context *nfs, struct nfs_cb_d
 
 int nfs_access_async(struct nfs_context *nfs, const char *path, int mode, nfs_cb cb, void *private_data)
 {
-       if (nfs_lookuppath_async(nfs, path, cb, private_data, nfs_access_continue_internal, NULL, NULL, mode) != 0) {
+       if (nfs_lookuppath_async(nfs, path, 0, cb, private_data, nfs_access_continue_internal, NULL, NULL, mode) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3460,7 +4418,7 @@ static void nfs_symlink_cb(struct rpc_context *rpc, int status, void *command_da
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        struct nfs_symlink_data *symlink_data = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        if (status == RPC_STATUS_ERROR) {
@@ -3486,7 +4444,7 @@ static void nfs_symlink_cb(struct rpc_context *rpc, int status, void *command_da
        free_nfs_cb_data(data);
 }
 
-static int nfs_symlink_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_symlink_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct nfs_symlink_data *symlink_data = data->continue_data;
        SYMLINK3args args;
@@ -3549,7 +4507,7 @@ int nfs_symlink_async(struct nfs_context *nfs, const char *oldpath, const char *
                return -1;
        }
 
-       if (nfs_lookuppath_async(nfs, symlink_data->newpathparent, cb, private_data, nfs_symlink_continue_internal, symlink_data, free_nfs_symlink_data, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, symlink_data->newpathparent, 0, cb, private_data, nfs_symlink_continue_internal, symlink_data, free_nfs_symlink_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3596,7 +4554,7 @@ static void nfs_rename_cb(struct rpc_context *rpc, int status, void *command_dat
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        struct nfs_rename_data *rename_data = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        if (status == RPC_STATUS_ERROR) {
@@ -3622,7 +4580,7 @@ static void nfs_rename_cb(struct rpc_context *rpc, int status, void *command_dat
        free_nfs_cb_data(data);
 }
 
-static int nfs_rename_continue_2_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_rename_continue_2_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct nfs_rename_data *rename_data = data->continue_data;
        RENAME3args args;
@@ -3645,22 +4603,31 @@ static int nfs_rename_continue_2_internal(struct nfs_context *nfs, struct nfs_cb
 }
 
 
-static int nfs_rename_continue_1_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_rename_continue_1_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct nfs_rename_data *rename_data = data->continue_data;
+       char* newpath = strdup(rename_data->newpath);
+       if (!newpath) {
+               rpc_set_error(nfs->rpc, "Out of memory. Could not allocate memory to store target path for rename");
+               data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+               free_nfs_cb_data(data);
+               return -1;
+       }
 
        /* steal the filehandle */
        rename_data->olddir = data->fh;
        data->fh.data.data_val = NULL;
 
-       if (nfs_lookuppath_async(nfs, rename_data->newpath, data->cb, data->private_data, nfs_rename_continue_2_internal, rename_data, free_nfs_rename_data, 0) != 0) {
-               rpc_set_error(nfs->rpc, "RPC error: Failed to send LOOKUP call for %s", rename_data->newpath);
+       if (nfs_lookuppath_async(nfs, rename_data->newpath, 0, data->cb, data->private_data, nfs_rename_continue_2_internal, rename_data, free_nfs_rename_data, 0) != 0) {
+               rpc_set_error(nfs->rpc, "RPC error: Failed to send LOOKUP call for %s", newpath);
                data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                free_nfs_cb_data(data);
+               free(newpath);
                return -1;
        }
        data->continue_data = NULL;
        free_nfs_cb_data(data);
+       free(newpath);
 
        return 0;
 }
@@ -3712,7 +4679,7 @@ int nfs_rename_async(struct nfs_context *nfs, const char *oldpath, const char *n
        rename_data->newobject = ptr;
 
 
-       if (nfs_lookuppath_async(nfs, rename_data->oldpath, cb, private_data, nfs_rename_continue_1_internal, rename_data, free_nfs_rename_data, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, rename_data->oldpath, 0, cb, private_data, nfs_rename_continue_1_internal, rename_data, free_nfs_rename_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3757,7 +4724,7 @@ static void nfs_link_cb(struct rpc_context *rpc, int status, void *command_data,
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        struct nfs_link_data *link_data = data->continue_data;
-       
+
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
        if (status == RPC_STATUS_ERROR) {
@@ -3783,7 +4750,7 @@ static void nfs_link_cb(struct rpc_context *rpc, int status, void *command_data,
        free_nfs_cb_data(data);
 }
 
-static int nfs_link_continue_2_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_link_continue_2_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct nfs_link_data *link_data = data->continue_data;
        LINK3args args;
@@ -3806,7 +4773,7 @@ static int nfs_link_continue_2_internal(struct nfs_context *nfs, struct nfs_cb_d
 }
 
 
-static int nfs_link_continue_1_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_link_continue_1_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        struct nfs_link_data *link_data = data->continue_data;
 
@@ -3814,7 +4781,7 @@ static int nfs_link_continue_1_internal(struct nfs_context *nfs, struct nfs_cb_d
        link_data->oldfh = data->fh;
        data->fh.data.data_val = NULL;
 
-       if (nfs_lookuppath_async(nfs, link_data->newpath, data->cb, data->private_data, nfs_link_continue_2_internal, link_data, free_nfs_link_data, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, link_data->newpath, 0, data->cb, data->private_data, nfs_link_continue_2_internal, link_data, free_nfs_link_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "RPC error: Failed to send LOOKUP call for %s", link_data->newpath);
                data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
                free_nfs_cb_data(data);
@@ -3863,7 +4830,7 @@ int nfs_link_async(struct nfs_context *nfs, const char *oldpath, const char *new
        link_data->newobject = ptr;
 
 
-       if (nfs_lookuppath_async(nfs, link_data->oldpath, cb, private_data, nfs_link_continue_1_internal, link_data, free_nfs_link_data, 0) != 0) {
+       if (nfs_lookuppath_async(nfs, link_data->oldpath, 0, cb, private_data, nfs_link_continue_1_internal, link_data, free_nfs_link_data, 0) != 0) {
                rpc_set_error(nfs->rpc, "Out of memory: failed to start parsing the path components");
                return -1;
        }
@@ -3896,6 +4863,22 @@ uint64_t nfs_get_writemax(struct nfs_context *nfs)
        return nfs->writemax;
 }
 
+void nfs_set_tcp_syncnt(struct nfs_context *nfs, int v) {
+       rpc_set_tcp_syncnt(nfs->rpc, v);
+}
+
+void nfs_set_uid(struct nfs_context *nfs, int uid) {
+       rpc_set_uid(nfs->rpc, uid);
+}
+
+void nfs_set_gid(struct nfs_context *nfs, int gid) {
+       rpc_set_gid(nfs->rpc, gid);
+}
+
+void nfs_set_readahead(struct nfs_context *nfs, uint32_t v) {
+       rpc_set_readahead(nfs->rpc, v);
+}
+
 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...)
 {
         va_list ap;
@@ -3908,7 +4891,7 @@ void nfs_set_error(struct nfs_context *nfs, char *error_string, ...)
                free(nfs->rpc->error_string);
        }
        nfs->rpc->error_string = str;
-    va_end(ap);
+       va_end(ap);
 }
 
 
@@ -3962,91 +4945,6 @@ static void mount_export_4_cb(struct rpc_context *rpc, int status, void *command
        /* Dont want any more callbacks even if the socket is closed */
        rpc->connect_cb = NULL;
 
-       if (status == RPC_STATUS_ERROR) {       
-               data->cb(rpc, -EFAULT, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(rpc, -EINTR, "Command was cancelled", data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-
-       if (rpc_mount3_export_async(rpc, mount_export_5_cb, data) != 0) {
-               data->cb(rpc, -ENOMEM, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-}
-
-static void mount_export_3_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct mount_cb_data *data = private_data;
-       uint32_t mount_port;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(rpc, -EFAULT, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(rpc, -EINTR, "Command was cancelled", data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-
-       mount_port = *(uint32_t *)command_data;
-       if (mount_port == 0) {
-               rpc_set_error(rpc, "RPC error. Mount program is not available");
-               data->cb(rpc, -ENOENT, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-
-       rpc_disconnect(rpc, "normal disconnect");
-       if (rpc_connect_async(rpc, data->server, mount_port, mount_export_4_cb, data) != 0) {
-               data->cb(rpc, -ENOMEM, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-}
-
-static void mount_export_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct mount_cb_data *data = private_data;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       if (status == RPC_STATUS_ERROR) {
-               data->cb(rpc, -EFAULT, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-       if (status == RPC_STATUS_CANCEL) {
-               data->cb(rpc, -EINTR, "Command was cancelled", data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-
-       if (rpc_pmap_getport_async(rpc, MOUNT_PROGRAM, MOUNT_V3, IPPROTO_TCP, mount_export_3_cb, private_data) != 0) {
-               data->cb(rpc, -ENOMEM, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-}
-
-static void mount_export_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
-{
-       struct mount_cb_data *data = private_data;
-
-       assert(rpc->magic == RPC_CONTEXT_MAGIC);
-
-       /* Dont want any more callbacks even if the socket is closed */
-       rpc->connect_cb = NULL;
-
        if (status == RPC_STATUS_ERROR) {
                data->cb(rpc, -EFAULT, command_data, data->private_data);
                free_mount_cb_data(data);
@@ -4058,7 +4956,7 @@ static void mount_export_1_cb(struct rpc_context *rpc, int status, void *command
                return;
        }
 
-       if (rpc_pmap_null_async(rpc, mount_export_2_cb, data) != 0) {
+       if (rpc_mount3_export_async(rpc, mount_export_5_cb, data) != 0) {
                data->cb(rpc, -ENOMEM, command_data, data->private_data);
                free_mount_cb_data(data);
                return;
@@ -4082,8 +4980,9 @@ int mount_getexports_async(struct rpc_context *rpc, const char *server, rpc_cb c
        if (data->server == NULL) {
                free_mount_cb_data(data);
                return -1;
-       }       
-       if (rpc_connect_async(rpc, data->server, 111, mount_export_1_cb, data) != 0) {
+       }
+       if (rpc_connect_program_async(rpc, data->server, MOUNT_PROGRAM, MOUNT_V3, mount_export_4_cb, data) != 0) {
+               rpc_set_error(rpc, "Failed to start connection");
                free_mount_cb_data(data);
                return -1;
        }