libnfs.c: add nlink to nfsdirent so we can get it for 'free'
[deb_libnfs.git] / lib / libnfs.c
index 9fdbd0d549e393a4353fe3ac975494ccec9e70be..30719ab562809cb59172cf5cd3b6b2434d0bffa3 100644 (file)
 #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 1024
+
 struct nfsdir {
+       struct nfs_fh3 fh;
+       fattr3 attr;
+       struct nfsdir *next;
+
        struct nfsdirent *entries;
        struct nfsdirent *current;
 };
@@ -83,6 +91,7 @@ struct nfsdir {
 struct nfsfh {
        struct nfs_fh3 fh;
        int is_sync;
+       int is_append;
        uint64_t offset;
 };
 
@@ -94,6 +103,7 @@ struct nfs_context {
        uint64_t readmax;
        uint64_t writemax;
        char *cwd;
+       struct nfsdir *dircache;
 };
 
 void nfs_free_nfsdir(struct nfsdir *nfsdir)
@@ -106,11 +116,42 @@ 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;
@@ -132,7 +173,7 @@ struct nfs_cb_data {
        int cancel;
        int oom;
        int num_calls;
-       uint64_t start_offset, max_offset;
+       uint64_t start_offset, max_offset, count;
        char *buffer;
        size_t request_size;
        char *usrbuf;
@@ -142,9 +183,10 @@ 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);
 
 void nfs_set_auth(struct nfs_context *nfs, struct AUTH *auth)
 {
@@ -375,6 +417,12 @@ void nfs_destroy_context(struct nfs_context *nfs)
                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);
 }
 
@@ -394,6 +442,30 @@ 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;
@@ -414,6 +486,25 @@ 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);
 }
@@ -421,7 +512,9 @@ 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);
 
@@ -436,7 +529,29 @@ 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);
@@ -455,6 +570,7 @@ 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);
 
@@ -469,10 +585,26 @@ 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;
        }
 }
 
@@ -496,14 +628,25 @@ 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;
 
@@ -542,9 +685,6 @@ static void free_nfs_cb_data(struct nfs_cb_data *data)
 }
 
 
-
-
-
 static void nfs_mount_10_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
 {
        struct nfs_cb_data *data = private_data;
@@ -627,36 +767,6 @@ 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;
@@ -695,11 +805,13 @@ 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);
 }
@@ -730,123 +842,6 @@ 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
  */
@@ -875,7 +870,7 @@ 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;
@@ -895,6 +890,7 @@ static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *comm
        struct nfs_cb_data *data = private_data;
        struct nfs_context *nfs = data->nfs;
        LOOKUP3res *res;
+       fattr3 *attr;
 
        assert(rpc->magic == RPC_CONTEXT_MAGIC);
 
@@ -917,15 +913,17 @@ static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *comm
                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;
-       }
+       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, struct nfs_cb_data *data, struct nfs_fh3 *fh)
+static int nfs_lookup_path_async_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data, struct nfs_fh3 *fh)
 {
        char *path, *slash;
        LOOKUP3args args;
@@ -964,11 +962,10 @@ static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb
                if (slash != NULL) {
                        *slash = '/';
                }
-               data->continue_cb(nfs, data);
+               data->continue_cb(nfs, attr, data);
                return 0;
        }
 
-
        memset(&args, 0, sizeof(LOOKUP3args));
        args.what.dir = *fh;
        args.what.name = path;
@@ -1043,7 +1040,7 @@ static int nfs_normalize_path(struct nfs_context *nfs, char *path)
 
        /* /$ -> \0 */
        len = strlen(path);
-       if (len >= 1) {
+       if (len > 1) {
                if (path[len - 1] == '/') {
                        path[len - 1] = '\0';
                        len--;
@@ -1085,9 +1082,45 @@ static int nfs_normalize_path(struct nfs_context *nfs, char *path)
        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, 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 = ".";
@@ -1133,18 +1166,27 @@ static int nfs_lookuppath_async(struct nfs_context *nfs, const char *path, nfs_c
        }
 
        data->path = data->saved_path;
-
-       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 */
+       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()
  */
@@ -1206,7 +1248,7 @@ static void nfs_stat_1_cb(struct rpc_context *rpc, int status, void *command_dat
        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;
 
@@ -1286,7 +1328,7 @@ static void nfs_stat64_1_cb(struct rpc_context *rpc, int status, void *command_d
        free_nfs_cb_data(data);
 }
 
-static int nfs_stat64_continue_internal(struct nfs_context *nfs, struct 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;
 
@@ -1355,6 +1397,9 @@ static void nfs_open_trunc_cb(struct rpc_context *rpc, int status, void *command
        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;
@@ -1451,6 +1496,9 @@ 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;
@@ -1460,7 +1508,7 @@ 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;
@@ -1504,7 +1552,7 @@ int nfs_open_async(struct nfs_context *nfs, const char *path, int flags, nfs_cb
 /*
  * Async chdir()
  */
-static int nfs_chdir_continue_internal(struct nfs_context *nfs, struct nfs_cb_data *data)
+static int nfs_chdir_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        /* steal saved_path */
        free(nfs->cwd);
@@ -1564,9 +1612,14 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
                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  {
+               } 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 || (res->READ3res_u.resok.count < mdata->count && !res->READ3res_u.resok.eof)) {
+                       if (data->num_calls || (count < mdata->count && !res->READ3res_u.resok.eof)) {
                                if (data->buffer == NULL) {
                                        data->buffer =  malloc(data->request_size);
                                        if (data->buffer == NULL) {
@@ -1575,14 +1628,14 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
                                        }
                                }
                        }
-                       if (res->READ3res_u.resok.count > 0) {
-                               if (res->READ3res_u.resok.count <= mdata->count) {
+                       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->start_offset], res->READ3res_u.resok.data.data_val, res->READ3res_u.resok.count);
+                                               memcpy(&data->buffer[mdata->offset - data->start_offset], res->READ3res_u.resok.data.data_val, count);
                                        }
-                                       if (data->max_offset < mdata->offset + res->READ3res_u.resok.count) {
-                                               data->max_offset = mdata->offset + res->READ3res_u.resok.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!");
@@ -1590,22 +1643,22 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
                                }
                        }
                        /* check if we have received a short read */
-                       if (res->READ3res_u.resok.count < mdata->count && !res->READ3res_u.resok.eof) {
-                               if (res->READ3res_u.resok.count == 0) {
+                       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 += res->READ3res_u.resok.count;
-                                       mdata->count -= res->READ3res_u.resok.count;
+                                       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->error = 1;
+                                               data->oom = 1;
                                        }
                                }
                        }
@@ -1634,7 +1687,6 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
                return;
        }
 
-       data->nfsfh->offset = data->max_offset;
        if (data->buffer) {
                data->cb(data->max_offset - data->start_offset, nfs, data->buffer, data->private_data);
        } else {
@@ -1644,7 +1696,7 @@ static void nfs_pread_mcb(struct rpc_context *rpc, int status, void *command_dat
        free_nfs_cb_data(data);
 }
 
-int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offset, uint64_t count, nfs_cb cb, void *private_data)
+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;
 
@@ -1660,12 +1712,9 @@ int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offse
        data->nfsfh        = nfsfh;
        data->request_size = count;
 
-       nfsfh->offset = offset;
-
        assert(data->num_calls == 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.
+       /* chop requests into chunks of at most READMAX bytes if necessary.
         * we send all reads in parallel so that performance is still good.
         */
        data->max_offset = offset;
@@ -1683,24 +1732,30 @@ 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");
-                       if (data->num_calls == 0)
+                       if (data->num_calls == 0) {
                                free_nfs_cb_data(data);
-                       return -1;
+                               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;
 
                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);
-                       if (data->num_calls == 0)
+                       if (data->num_calls == 0) {
                                free_nfs_cb_data(data);
-                       return -1;
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
 
                count               -= readcount;
@@ -1711,12 +1766,17 @@ int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offse
         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);
 }
 
 
@@ -1731,7 +1791,7 @@ static void nfs_fill_WRITE3args (WRITE3args *args, struct nfsfh *fh, uint64_t of
        args->file = fh->fh;
        args->offset = offset;
        args->count  = count;
-       args->stable = fh->is_sync?FILE_SYNC:UNSTABLE;
+       args->stable = fh->is_sync ? FILE_SYNC : UNSTABLE;
        args->data.data_len = count;
        args->data.data_val = buf;
 }
@@ -1762,15 +1822,21 @@ 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 < mdata->count) {
-                               if (res->WRITE3res_u.resok.count == 0) {
+                       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 += res->WRITE3res_u.resok.count;
-                                       mdata->count -= res->WRITE3res_u.resok.count;
+                                       mdata->offset += count;
+                                       mdata->count -= count;
+
                                        nfs_fill_WRITE3args(&args, data->nfsfh, mdata->offset, mdata->count,
                                                                                &data->usrbuf[mdata->offset - data->start_offset]);
                                        if (rpc_nfs3_write_async(nfs->rpc, nfs_pwrite_mcb, &args, mdata) == 0) {
@@ -1778,13 +1844,13 @@ static void nfs_pwrite_mcb(struct rpc_context *rpc, int status, void *command_da
                                                return;
                                        } else {
                                                rpc_set_error(nfs->rpc, "RPC error: Failed to send WRITE call for %s", data->path);
-                                               data->error = 1;
+                                               data->oom = 1;
                                        }
                                }
                        }
-                       if (res->WRITE3res_u.resok.count > 0) {
-                               if (data->max_offset < mdata->offset + res->WRITE3res_u.resok.count) {
-                                       data->max_offset = mdata->offset + res->WRITE3res_u.resok.count;
+                       if (count > 0) {
+                               if (data->max_offset < mdata->offset + count) {
+                                       data->max_offset = mdata->offset + count;
                                }
                        }
                }
@@ -1796,7 +1862,11 @@ static void nfs_pwrite_mcb(struct rpc_context *rpc, int status, void *command_da
                /* still waiting for more replies */
                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);
@@ -1808,14 +1878,13 @@ static void nfs_pwrite_mcb(struct rpc_context *rpc, int status, void *command_da
                return;
        }
 
-       data->nfsfh->offset = data->max_offset;
        data->cb(data->max_offset - data->start_offset, nfs, NULL, data->private_data);
 
        free_nfs_cb_data(data);
 }
 
 
-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;
 
@@ -1831,13 +1900,10 @@ int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offs
        data->nfsfh        = nfsfh;
        data->usrbuf       = buf;
 
-       nfsfh->offset = offset;
-
        /* hello, clang-analyzer */
        assert(data->num_calls == 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;
@@ -1855,25 +1921,30 @@ 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");
-                       if (data->num_calls == 0)
+                       if (data->num_calls == 0) {
                                free_nfs_cb_data(data);
-                       return -1;
+                               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;
 
                nfs_fill_WRITE3args(&args, nfsfh, offset, writecount, &buf[offset - data->start_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);
-                       if (data->num_calls == 0)
+                       if (data->num_calls == 0) {
                                free_nfs_cb_data(data);
-
-                       return -1;
+                               return -1;
+                       }
+                       data->oom = 1;
+                       break;
                }
 
                count               -= writecount;
@@ -1884,12 +1955,79 @@ int nfs_pwrite_async(struct nfs_context *nfs, struct nfsfh *nfsfh, uint64_t offs
        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);
+       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);
 }
 
 
@@ -2078,7 +2216,7 @@ 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;
@@ -2149,7 +2287,7 @@ 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;
@@ -2240,7 +2378,7 @@ 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;
@@ -2385,7 +2523,7 @@ 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_creat_continue_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data)
 {
        char *str = data->continue_data;
        CREATE3args args;
@@ -2476,7 +2614,7 @@ 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;
@@ -2575,7 +2713,7 @@ 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;
@@ -2723,6 +2861,7 @@ static void nfs_opendir3_cb(struct rpc_context *rpc, int status, void *command_d
                        nfsdirent->ctime.tv_usec = attributes->ctime.nseconds/1000;
                        nfsdirent->uid = attributes->uid;
                        nfsdirent->gid = attributes->gid;
+                       nfsdirent->nlink = attributes->nlink;
                }
        }
 
@@ -2829,49 +2968,54 @@ 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) {
+       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);
-                               rdpe_cb_data->status = RPC_STATUS_ERROR;
                                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++;
        }
 }
 
@@ -2958,6 +3102,7 @@ static void nfs_opendir_cb(struct rpc_context *rpc, int status, void *command_da
                        nfsdirent->ctime.tv_usec = entry->name_attributes.post_op_attr_u.attributes.ctime.nseconds/1000;
                        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->next  = nfsdir->entries;
@@ -2987,6 +3132,9 @@ 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;
@@ -2995,9 +3143,34 @@ 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;
@@ -3047,9 +3220,9 @@ struct nfsdirent *nfs_readdir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir
 /*
  * closedir()
  */
-void nfs_closedir(struct nfs_context *nfs _U_, struct nfsdir *nfsdir)
+void nfs_closedir(struct nfs_context *nfs, struct nfsdir *nfsdir)
 {
-       nfs_free_nfsdir(nfsdir);
+       nfs_dircache_add(nfs, nfsdir);
 }
 
 
@@ -3070,7 +3243,7 @@ void nfs_getcwd(struct nfs_context *nfs, const char **cwd)
 struct lseek_cb_data {
        struct nfs_context *nfs;
        struct nfsfh *nfsfh;
-       uint64_t offset;
+       int64_t offset;
        nfs_cb cb;
        void *private_data;
 };
@@ -3080,6 +3253,7 @@ 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);
 
@@ -3102,24 +3276,41 @@ 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;
        }
 
@@ -3198,7 +3389,7 @@ 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;
 
@@ -3260,7 +3451,7 @@ static void nfs_readlink_1_cb(struct rpc_context *rpc, int status, void *command
        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;
 
@@ -3322,7 +3513,7 @@ 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;
 
@@ -3377,7 +3568,7 @@ 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) {
+       if (nfs_chmod_continue_internal(nfs, NULL, data) != 0) {
                return -1;
        }
 
@@ -3425,7 +3616,7 @@ 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;
@@ -3511,7 +3702,7 @@ 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) {
+       if (nfs_chown_continue_internal(nfs, NULL, data) != 0) {
                return -1;
        }
 
@@ -3556,7 +3747,7 @@ 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;
@@ -3694,7 +3885,7 @@ 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;
@@ -3791,7 +3982,7 @@ 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;
@@ -3927,7 +4118,7 @@ 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;
@@ -3950,7 +4141,7 @@ 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);
@@ -4097,7 +4288,7 @@ 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;
@@ -4120,7 +4311,7 @@ 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;
 
@@ -4306,91 +4497,6 @@ static void mount_export_4_cb(struct rpc_context *rpc, int status, void *command
        }
 }
 
-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);
-               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_null_async(rpc, mount_export_2_cb, data) != 0) {
-               data->cb(rpc, -ENOMEM, command_data, data->private_data);
-               free_mount_cb_data(data);
-               return;
-       }
-}
-
 int mount_getexports_async(struct rpc_context *rpc, const char *server, rpc_cb cb, void *private_data)
 {
        struct mount_cb_data *data;
@@ -4409,7 +4515,8 @@ int mount_getexports_async(struct rpc_context *rpc, const char *server, rpc_cb c
                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;
        }