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* Fix str/list/tuple distinguishing in library functions to support py3Valerii Ponomarov2019-11-282-8/+12
| | | | | | | | | | We try to distinguish strings from other iterable object types in several our library functions and now it is not compatible with py3. The problem is that in py2 strings don't have "__iter__" method, but it exists in case of py3. So, fix it by using py2/3 compatible check for string types. Change-Id: I3f833b5e79f1563a3ae6a2bb9ae43d8919d82c30
* Add test for creation of PVC when one node downadityaramteke2019-11-271-1/+1
| | | | | | | The purpose of this test case is to confirm that provisioning succeeds if at least 3 nodes are UP in a CNS cluster with nodes >3. Change-Id: I7fc1f851114d921f65e819db23502776526e6827
* Add TC deleting bunch of PVC's during network failureArun Kumar2019-11-261-5/+11
| | | | | | | | Create network failure while deleting PVC's Network side failure is introduced by opening and closing the ports related to gluster-blockd. Change-Id: Id3a749aa1a051bbce99b85046fa0a79831e85dd5
* Fix library 'power_off_gluster_node_vm'Nitin Goyal2019-11-221-0/+1
| | | | | | | Fix the library via adding cleanup power_on_vm which was missed during library creation. Change-Id: I6b2fe78378cac61cee5d630562c0ba7201bbaa4e
* Add TC restart initiator node when gluster node is downNitin Goyal2019-11-223-5/+140
| | | | | | | Add new TC where we verify iscsi rediscovery is happening properly on restart of initiator nodes when one gluster node is down. Change-Id: I515bb27d43843f7c19c4a12b6531a212e9c3285a
* Add new TC verify PID's of gluster volumeNitin Goyal2019-11-211-1/+7
| | | | | | | Add new TC where it will verify PID's of gluster volumes are same when volume options value is different. Change-Id: Ie0cae1ad3fdfd35e4c0e7f01e3a048b62b185369
* Modify and move 'topology_volumes_with_bricks' func to 'heketi_ops.py'Sri Vignesh2019-11-211-0/+32
| | | | | | | | Move 'topology_volumes_with_bricks' func to the "heketi_ops" module to be able to use it in other test cases. Change-Id: I7cca884a4f3fb34ec15bb947d3c39d9226e294d0 Signed-off-by: Sri Vignesh <sselvan@redhat.com>
* Add test for inconsistencies in targetcli when BHV is downAditya Ramteke2019-11-191-2/+3
| | | | | | | Confirm no inconsistencies occur in targetcli when block devices are created with one block hosting volume down. Change-Id: I2a755ef2a88c6e6ca5326be3787ac07c0fb7db26
* Fix test case "test_heketi_node_add_with_valid_cluster"vamahaja2019-11-192-0/+69
| | | | | | | | | | Fix consists of - - Remove steps for add device validation. - Add steps for gluser peer status validation. - Add steps for endpoints validation. Change-Id: I773a883b1ea8bb2bc93660db3459fd864fcd1317 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add new oc librarieskasturiNarra2019-11-151-0/+138
| | | | Change-Id: I78eb0975c60d1c16b05914bed74b6f942dd0335e
* Add test case to automate heketi add node into valid clustervamahaja2019-11-141-0/+6
| | | | | Change-Id: I4a2ac7b819929c2de6c8ea5520257800d2e134cc Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add TC creating bunch of PVCs during network failureArun Kumar2019-11-081-6/+30
| | | | | | | | Create network side failure by opening and closing the ports related to gluster-blockd during creation of the PVC's, Verify PVC's are bound and validate multipath. Change-Id: Ibc53a13e2abb8674661da83d5881a13bbb2ad7fb
* Make 'provisioner' be autocalculated for storage classesValerii Ponomarov2019-10-312-8/+29
| | | | | | | | | | | | | | | In OCS 3.11.4 was changed the approach for 'provisioners' in storage classes due to the BugZilla bugs [1] and [2]. So, change the approach for getting 'provisioner' value in this project making it be autocalculated based on the data taken from the block provisioner pod, which is located in the working namespace. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1732787 [2] https://bugzilla.redhat.com/show_bug.cgi?id=1738394 Change-Id: Ic1037038e39abba2b2a1ad6dc3ddbfe42473cb88 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add possibility to check Heketi DB inconsistencies after each tcValerii Ponomarov2019-10-251-0/+33
| | | | | | | | | Define 'check_heketi_db_inconsistencies' config option setting there 'False' or 'True' values. Default value is 'True'. If heketi client doesn't support the 'heketi db check' feature, then 'heketi db check' just won't be performed. Change-Id: I7faff35b15e40d864c0377ae7fee154e217d8eae
* Add library to get heketi block volumes by name prefixvamahaja2019-10-171-0/+32
| | | | | | | | | | | | | | This change required due to - 1. Get block volume by prefix is common step which is used in two places for now and will be used in other places too. 2. Hence add library "heketi_blockvolume_list_by_name_prefix" in heketi_ops.py. 3. And use added library and update code from class "GlusterStabilityTestSetup" and "TestGlusterBlockStability". Change-Id: I9e60d58d5c84380104081335745270b3d21ff071 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add test cases to perform heketi cluster operations with nodesvamahaja2019-10-173-0/+164
| | | | | Change-Id: I22410ad8c81ca71ac9c2cbaddd66f086abcdf3c5 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add library to add/remove iptables rule on hostvamahaja2019-10-171-0/+50
| | | | | Change-Id: I1055b232711c95fdbf89ba9fe8b9d61a561fbcd5 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add new library heketi_node_removeNitin Goyal2019-10-101-0/+34
| | | | Change-Id: I96759bbcd74cad7755c99255b4b96261133d5adc
* Add support for new resource typekasturiNarra2019-10-101-4/+11
| | | | | | | | | As of now user can only pass dc name as argument to validate iscsi and multipath session, with this support user can also pass pod name by specifying rtype=pod Change-Id: Iecc86edc2a2239fc05535f0e4f7e9ae93d5e76f5
* Add TC Fail tcmu-runner service while creating and deleting pvcArun Kumar2019-09-251-0/+30
| | | | | | | | | | Create 8 Block PVC and wait for them to get bound. Delete created PVC's and create 8 more PVC's simultaneously. Kill the tcmu-runner service while PVC creation and deletion is in the progress. Restart all the services related to block volumes and verify all pending operations are completed sucessfully. Change-Id: I0cb4cd29b92233a65be93f4b96f1a9a0cb8bed9f
* [Lib+tc]Add testcase and library to validate total count of volumesSri Vignesh2019-09-251-0/+33
| | | | | | | | Add library to check db results Validate count of volumes of heketi and db are same Change-Id: I6e75f2d8d5f19a94c1dced5a07f9c948b4de9ef4 Signed-off-by: Sri Vignesh <sselvan@redhat.com>
* Fix typos in verify_volume_name_prefix function's descriptionadityaramteke2019-09-231-1/+1
| | | | Change-Id: I46ad6aefd3c699b4ce7807db89c2016791a48e05
* Add multiple PVCs states waiterValerii Ponomarov2019-09-232-49/+64
| | | | | | | | Add new function called 'wait_for_pvcs_be_bound', which allows us to wait for 'Bound' state of multiple PVCs using single timeout. Also, reuse this new function in the baseclass.py Change-Id: Ia3809d322925b90fdef984db59b3e9e83a82abc7
* Fix heketi_blockvolume_create lib descriptionNitin Goyal2019-09-191-1/+1
| | | | | | Change the 'cluster' to 'clusters' in kwargs description. Change-Id: Iac9170d0549adc6bb5b76f5772de47d1db083951
* Remove json description from heketi_device_add libNitin Goyal2019-09-191-1/+0
| | | | | | | Remove json description from heketi_device_add library as it is not supported. Change-Id: If3121294dc9456587af36d65726842f399730a9b
* [Revert] "Fix heketi_device_add library"Nitin Goyal2019-09-191-2/+0
| | | | | | This reverts commit 046244942f7ad3f5f24b675dfa299ad955f1412f. Change-Id: I1f49d613af3dd236bf4113db757cbf9ce752e973
* Add waiter for multiple resources absenceValerii Ponomarov2019-09-192-38/+65
| | | | | | | | | | Add new function called 'wait_for_resources_absence', which allows us to wait for absense of multiple resources using single timeout. Also, reuse this new function in the baseclass.py for PVC/PV removal waitings. Change-Id: I6e3daae012199e50d3aeb68b697cfae801b0b49b
* Merge heketi node operation tests in one class and fix libraryvamahaja2019-09-191-17/+20
| | | | | | | | | | | | | | | | Fix consists of - - Use "**kwargs" approach in the "heketi_node_list" function as it is done in lots of other functions. - Parse the CLI output in the "heketi_node_list" function using regex instead of the splitting and stripping strings. - Combine test cases related to the same feature into one module - test_heketi_node_operations.py - Remove redundant checks which already exist in common libraries. - Remove unnecessary logging. Change-Id: I815ddfbbacb765140229e7630ec87a6bbaa6255b Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add testcase for passing clusterid when creating storage classAshmitha2019-09-182-3/+5
| | | | Change-Id: I4a6fd02f5713b4e86a9d70cdaffd3ca9369932f4
* Add TC create and delete PVC's when block services are downNitin Goyal2019-09-161-1/+6
| | | | | | | Add new TC verify PVC's create and delete fails while gluster-blockd and tcmu-runner services are down on one node. Change-Id: I5acbcfd6c9a227c0cce21c62f5e162caf970aa22
* Fix multiple usages of waitersValerii Ponomarov2019-09-163-10/+17
| | | | | | | | | | | | | | | | Fix consists of 2 parts: - Calculate correctly left time for waiting in 'scale_dcs_pod_amount_and_wait' function. Before, it had bug, where we were waiting less time than requested. And it led to the unexpected timeout errors. Example: it could fail waiting only 180sec having 600sec as real timeout. - Reset 'attempts' on the instantiated 'waiter's to avoid redundant waiting reusing the single waiter instance. Example. On deletion of 20 PVCs we save about 1,5 minutes. In whole test suite we create much more PVCs than 20. Change-Id: I5d06a63dd0c2c5bd67fdb09fef87948d65e6bf22
* Fix heketi_device_add libraryNitin Goyal2019-09-161-0/+2
| | | | | | As part of the fix loaded the output into json which was missed. Change-Id: Ia3d07f768362232ec2b34641be1a6ae4c4eec399
* Add test cases for the heketi zones featureValerii Ponomarov2019-09-131-1/+9
| | | | | | | | | | Add 10 test cases for testing Heketi zones feature. To make all the Heketi zones test cases run in the single suite using the same cluster set 'common.allow_heketi_zones_update' config option to "True" value. By default it is set to "False" and only small set of test cases can run having such value. Change-Id: I69a1f7c96c9f52a06134e715e113ccd9b06764e6
* Fix test cases which are failing to delete volume after test completionvamahaja2019-09-131-0/+42
| | | | | | | | | | | In test case when we use large disk size, heketi takes time to create volume and due to timeout it gives error. Add fix in such test cases to check if volume created after getting an exception, get details of such volumes or raise exception in case it fails to create volume. Change-Id: I1c23a8c6558c23edf8947771e4f41a4bd3ffd66a Signed-off-by: vamahaja <vamahaja@redhat.com>
* Fix self.node issue in GlusterBlockBaseClass classvamahaja2019-09-131-7/+8
| | | | | | | | | Gluster block test cases failed with error "self.node" variable not found as self.node variable is not created in "GlusterStabilityTestSetup" class. Fixed change in baseclass.py by using variable "self.ocp_client[0]". Change-Id: I2affabbb626b7e266a9bb243d3ec249229ec9670 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Fix get gluster pod library for independent clustervamahaja2019-09-131-0/+3
| | | | | | | | | | | | "get_ocp_gluster_pod_details" library gives error "IndexError: list index out of range" in case of independent mode setup as "get_custom_resource" returns "[[]]" which in not none. Added fix to check if any element present in list. Change-Id: Iffd081f835ffaf9cb50c020cd297444ea2678950 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add test case to try creation of storage class with duplicate nameAshmitha2019-09-122-2/+5
| | | | Change-Id: If30737958bc667264fc01fe81d411f406b501918
* Add test cases to perform heketi cluster operationsvamahaja2019-09-111-0/+44
| | | | | Change-Id: I5886680a0d5666c68c677893e0fb327be0e80760 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Move func get_block_hosting_volume_by_pvc_name to baseclasskasturiNarra2019-09-091-0/+23
| | | | | | | | Move get_block_hosting_volume_by_pvc_name from test_restart_gluster_services to baseclass to be able to reuse it in other test modules. Change-Id: I65847792601b422293d4baed2ccade664ad7e54b
* Add TC abrupt reboot of initiator nodeNitin Goyal2019-09-061-0/+26
| | | | | | | Add new TC where we verify rediscovery of iscsi paths which happen after abrupt reboot of initiator node. Change-Id: I841e875881c47f8215d48821cd76c0399d43badc
* Add Error msg in GlusterBlockBaseClassNitin Goyal2019-09-061-9/+21
| | | | | | | Added Error msg in GlusterBlockBaseClass for better visibility in case of failures or debugging purpose. Change-Id: Ia92cd6f6129cb5aa55f6f8e807ef056e54691956
* Correct description of libraries in gluster_ops moduleNitin Goyal2019-09-061-2/+2
| | | | | | Changed the description of libraries in gluster_ops where it was wrong. Change-Id: I8ea9ec4ff1f28250d4544d6329b386271cf1e551
* [Library]: Modification in block volume create with nameSri Vignesh2019-09-051-3/+3
| | | | | | | | modification in block volume name parameter passed twice while creating Change-Id: Ieb827a8e7fa40a84eed7f8c5e90760710e6615b2 Signed-off-by: Sri Vignesh <sselvan@redhat.com>
* Add functionality to create more than 1 DC in parallelValerii Ponomarov2019-09-042-23/+97
| | | | | | | | We have test cases which create more than 1 app DC at once. So, add functionality to be able to create bunch of DCs in parallel and reuse it in one of test cases. Change-Id: Id606d02c31a919bbc6d49d59714dd5628c6a835d
* Fix pep8 errors in the files of the 'openshift-storage-libs' dirValerii Ponomarov2019-09-036-43/+43
| | | | Change-Id: Iaa7deca275958d4de68601dc16d1920f3dab85f2
* Fix "openshift_storage_version" to get valid version for OCS 3.10 & 3.9vamahaja2019-08-281-4/+14
| | | | | Change-Id: Ia0325c4309837fe3f89eab3c066775f9fb1ab1de Signed-off-by: vamahaja <vamahaja@redhat.com>
* Fix error handling logic in the "vmware" cloud providerNitin Goyal2019-08-271-4/+4
| | | | | | | | Fix error handling logic in the "vmware" cloud provider module by adding "raise" statement in places where it is lost. Change-Id: I92e97da4109bc6ab7368b41d2a6886e9f2be31c1
* Remove extra '-' from create_secretNitin Goyal2019-08-202-2/+2
| | | | Change-Id: I2ebc1c2e7e7aefb5e0d70342a7ec243a12b0663b
* Fix test cases skipped due to closed bugsvamahaja2019-08-192-1/+98
| | | | | | | | Add fix to test cases which are skipped due to bugs - BZ-1644685, BZ-1652913, BZ-1634745, BZ-1635736, BZ-1636477, BZ-1641668 Change-Id: I03a7f7dddaba5d3e41770969352b2263c84cb920 Signed-off-by: vamahaja <vamahaja@redhat.com>
* Add OCS version check for test casesvamahaja2019-08-141-0/+179
| | | | Change-Id: I4196cb1395a3720e03f62473d11e5f46d797c355
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/*
   Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
   This file is part of GlusterFS.

   This file is licensed to you under your choice of the GNU Lesser
   General Public License, version 3 or any later version (LGPLv3 or
   later), or the GNU General Public License, version 2 (GPLv2), in all
   cases as published by the Free Software Foundation.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#define __XOPEN_SOURCE 500

#include <openssl/md5.h>
#include <stdint.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <errno.h>
#include <libgen.h>
#include <pthread.h>
#include <ftw.h>
#include <sys/stat.h>
#include <signal.h>
#include <sys/uio.h>

#ifndef GF_BSD_HOST_OS
#include <alloca.h>
#endif /* GF_BSD_HOST_OS */

#ifdef HAVE_LINKAT
#include <fcntl.h>
#endif /* HAVE_LINKAT */

#include "glusterfs.h"
#include "checksum.h"
#include "dict.h"
#include "logging.h"
#include "posix.h"
#include "xlator.h"
#include "defaults.h"
#include "common-utils.h"
#include "compat-errno.h"
#include "compat.h"
#include "byte-order.h"
#include "syscall.h"
#include "statedump.h"
#include "locking.h"
#include "timer.h"
#include "glusterfs3-xdr.h"
#include "hashfn.h"
#include "posix-aio.h"
#include "glusterfs-acl.h"

extern char *marker_xattrs[];
#define ALIGN_SIZE 4096

#undef HAVE_SET_FSID
#ifdef HAVE_SET_FSID

#define DECLARE_OLD_FS_ID_VAR uid_t old_fsuid; gid_t old_fsgid;

#define SET_FS_ID(uid, gid) do {                \
                old_fsuid = setfsuid (uid);     \
                old_fsgid = setfsgid (gid);     \
        } while (0)

#define SET_TO_OLD_FS_ID() do {                 \
                setfsuid (old_fsuid);           \
                setfsgid (old_fsgid);           \
        } while (0)

#else

#define DECLARE_OLD_FS_ID_VAR
#define SET_FS_ID(uid, gid)
#define SET_TO_OLD_FS_ID()

#endif
int
posix_forget (xlator_t *this, inode_t *inode)
{
        uint64_t tmp_cache = 0;
        if (!inode_ctx_del (inode, this, &tmp_cache))
                dict_destroy ((dict_t *)(long)tmp_cache);

        return 0;
}

/* Regular fops */

int32_t
posix_lookup (call_frame_t *frame, xlator_t *this,
              loc_t *loc, dict_t *xdata)
{
        struct iatt buf                = {0, };
        int32_t     op_ret             = -1;
        int32_t     entry_ret          = 0;
        int32_t     op_errno           = 0;
        dict_t *    xattr              = NULL;
        char *      real_path          = NULL;
        char *      par_path           = NULL;
        struct iatt postparent         = {0,};
        int32_t     gfidless           = 0;
        struct  posix_private *priv    = NULL;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        priv = this->private;

        /* The Hidden directory should be for housekeeping purpose and it
           should not get any gfid on it */
        if (__is_root_gfid (loc->pargfid) && loc->name
            && (strcmp (loc->name, GF_HIDDEN_PATH) == 0)) {
                gf_log (this->name, GF_LOG_WARNING,
                        "Lookup issued on %s, which is not permitted",
                        GF_HIDDEN_PATH);
                op_errno = EPERM;
                op_ret = -1;
                goto out;
        }

        op_ret = dict_get_int32 (xdata, GF_GFIDLESS_LOOKUP, &gfidless);
        op_ret = -1;
        if (uuid_is_null (loc->pargfid) || (loc->name == NULL)) {
                /* nameless lookup */
                MAKE_INODE_HANDLE (real_path, this, loc, &buf);
        } else {
                MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &buf);

                if (uuid_is_null (loc->inode->gfid)) {
                        posix_gfid_heal (this, real_path, loc, xdata);
                        MAKE_ENTRY_HANDLE (real_path, par_path, this,
                                           loc, &buf);
                }
        }

        op_errno = errno;

        if (op_ret == -1) {
                if (op_errno != ENOENT) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "lstat on %s failed: %s",
                                real_path, strerror (op_errno));
                }

                entry_ret = -1;
                goto parent;
        }

        if (xdata && (op_ret == 0)) {
                xattr = posix_lookup_xattr_fill (this, real_path, loc,
                                                 xdata, &buf);
        }

parent:
        if (par_path) {
                op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "post-operation lstat on parent %s failed: %s",
                                par_path, strerror (op_errno));
			if (op_errno == ENOENT)
				/* If parent directory is missing in a lookup,
				   errno should be ESTALE (bad handle) and not
				   ENOENT (missing entry)
				*/
				op_errno = ESTALE;
                        goto out;
                }
        }

        op_ret = entry_ret;
out:
        if (xattr)
                dict_ref (xattr);

        if (!op_ret && !gfidless && uuid_is_null (buf.ia_gfid)) {
                gf_log (this->name, GF_LOG_ERROR, "buf->ia_gfid is null for "
                        "%s", (real_path) ? real_path: "");
                op_ret = -1;
                op_errno = ENODATA;
        }
        STACK_UNWIND_STRICT (lookup, frame, op_ret, op_errno,
                             (loc)?loc->inode:NULL, &buf, xattr, &postparent);

        if (xattr)
                dict_unref (xattr);

        return 0;
}


int32_t
posix_stat (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
{
        struct iatt           buf       = {0,};
        int32_t               op_ret    = -1;
        int32_t               op_errno  = 0;
        struct posix_private *priv      = NULL;
        char                 *real_path = NULL;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

        MAKE_INODE_HANDLE (real_path, this, loc, &buf);

        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, (op_errno == ENOENT)?
                        GF_LOG_DEBUG:GF_LOG_ERROR,
                        "lstat on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID();
        STACK_UNWIND_STRICT (stat, frame, op_ret, op_errno, &buf, NULL);

        return 0;
}

static int
posix_do_chmod (xlator_t *this, const char *path, struct iatt *stbuf)
{
        int32_t     ret = -1;
        mode_t      mode = 0;
        struct stat stat;
        int         is_symlink = 0;

        ret = sys_lstat (path, &stat);
        if (ret != 0) {
                gf_log (this->name, GF_LOG_WARNING,
                        "lstat failed: %s (%s)", path, strerror (errno));
                goto out;
        }

        if (S_ISLNK (stat.st_mode))
                is_symlink = 1;

        mode = st_mode_from_ia (stbuf->ia_prot, stbuf->ia_type);
        ret = lchmod (path, mode);
        if ((ret == -1) && (errno == ENOSYS)) {
                /* in Linux symlinks are always in mode 0777 and no
                   such call as lchmod exists.
                */
                gf_log (this->name, GF_LOG_DEBUG,
                        "%s (%s)", path, strerror (errno));
                if (is_symlink) {
                        ret = 0;
                        goto out;
                }

                ret = chmod (path, mode);
        }
out:
        return ret;
}

static int
posix_do_chown (xlator_t *this,
                const char *path,
                struct iatt *stbuf,
                int32_t valid)
{
        int32_t ret = -1;
        uid_t uid = -1;
        gid_t gid = -1;

        if (valid & GF_SET_ATTR_UID)
                uid = stbuf->ia_uid;

        if (valid & GF_SET_ATTR_GID)
                gid = stbuf->ia_gid;

        ret = lchown (path, uid, gid);

        return ret;
}

static int
posix_do_utimes (xlator_t *this,
                 const char *path,
                 struct iatt *stbuf)
{
        int32_t ret = -1;
        struct timeval tv[2]     = {{0,},{0,}};
        struct stat stat;
        int    is_symlink = 0;

        ret = sys_lstat (path, &stat);
        if (ret != 0) {
                gf_log (this->name, GF_LOG_WARNING,
                        "%s (%s)", path, strerror (errno));
                goto out;
        }

        if (S_ISLNK (stat.st_mode))
                is_symlink = 1;

        tv[0].tv_sec  = stbuf->ia_atime;
        tv[0].tv_usec = stbuf->ia_atime_nsec / 1000;
        tv[1].tv_sec  = stbuf->ia_mtime;
        tv[1].tv_usec = stbuf->ia_mtime_nsec / 1000;

        ret = lutimes (path, tv);
        if ((ret == -1) && (errno == ENOSYS)) {
                gf_log (this->name, GF_LOG_DEBUG,
                        "%s (%s)", path, strerror (errno));
                if (is_symlink) {
                        ret = 0;
                        goto out;
                }

                ret = utimes (path, tv);
        }

out:
        return ret;
}

int
posix_setattr (call_frame_t *frame, xlator_t *this,
               loc_t *loc, struct iatt *stbuf, int32_t valid, dict_t *xdata)
{
        int32_t        op_ret    = -1;
        int32_t        op_errno  = 0;
        char *         real_path = 0;
        struct iatt    statpre     = {0,};
        struct iatt    statpost    = {0,};

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_INODE_HANDLE (real_path, this, loc, &statpre);

        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "setattr (lstat) on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        if (valid & (GF_SET_ATTR_UID | GF_SET_ATTR_GID)){
                op_ret = posix_do_chown (this, real_path, stbuf, valid);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "setattr (chown) on %s failed: %s", real_path,
                                strerror (op_errno));
                        goto out;
                }
        }

        if (valid & GF_SET_ATTR_MODE) {
                op_ret = posix_do_chmod (this, real_path, stbuf);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "setattr (chmod) on %s failed: %s", real_path,
                                strerror (op_errno));
                        goto out;
                }
        }

        if (valid & (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME)) {
                op_ret = posix_do_utimes (this, real_path, stbuf);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "setattr (utimes) on %s failed: %s", real_path,
                                strerror (op_errno));
                        goto out;
                }
        }

        if (!valid) {
                op_ret = lchown (real_path, -1, -1);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "lchown (%s, -1, -1) failed => (%s)",
                                real_path, strerror (op_errno));

                        goto out;
                }
        }

        op_ret = posix_pstat (this, loc->gfid, real_path, &statpost);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "setattr (lstat) on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (setattr, frame, op_ret, op_errno,
                             &statpre, &statpost, NULL);

        return 0;
}

int32_t
posix_do_fchown (xlator_t *this,
                 int fd,
                 struct iatt *stbuf,
                 int32_t valid)
{
        int   ret      = -1;
        uid_t uid = -1;
        gid_t gid = -1;

        if (valid & GF_SET_ATTR_UID)
                uid = stbuf->ia_uid;

        if (valid & GF_SET_ATTR_GID)
                gid = stbuf->ia_gid;

        ret = fchown (fd, uid, gid);

        return ret;
}


int32_t
posix_do_fchmod (xlator_t *this,
                 int fd, struct iatt *stbuf)
{
        mode_t  mode = 0;

        mode = st_mode_from_ia (stbuf->ia_prot, stbuf->ia_type);
        return fchmod (fd, mode);
}

static int
posix_do_futimes (xlator_t *this,
                  int fd,
                  struct iatt *stbuf)
{
        gf_log (this->name, GF_LOG_WARNING, "function not implemented fd(%d)", fd);

        errno = ENOSYS;
        return -1;
}

int
posix_fsetattr (call_frame_t *frame, xlator_t *this,
                fd_t *fd, struct iatt *stbuf, int32_t valid, dict_t *xdata)
{
        int32_t        op_ret    = -1;
        int32_t        op_errno  = 0;
        struct iatt    statpre     = {0,};
        struct iatt    statpost    = {0,};
        struct posix_fd *pfd = NULL;
        int32_t          ret = -1;

        DECLARE_OLD_FS_ID_VAR;

        SET_FS_ID (frame->root->uid, frame->root->gid);

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                op_errno = -ret;
                gf_log (this->name, GF_LOG_DEBUG,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }

        op_ret = posix_fdstat (this, pfd->fd, &statpre);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fsetattr (fstat) failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        if (valid & GF_SET_ATTR_MODE) {
                op_ret = posix_do_fchmod (this, pfd->fd, stbuf);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fsetattr (fchmod) failed on fd=%p: %s",
                                fd, strerror (op_errno));
                        goto out;
                }
        }

        if (valid & (GF_SET_ATTR_UID | GF_SET_ATTR_GID)) {
                op_ret = posix_do_fchown (this, pfd->fd, stbuf, valid);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fsetattr (fchown) failed on fd=%p: %s",
                                fd, strerror (op_errno));
                        goto out;
                }

        }

        if (valid & (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME)) {
                op_ret = posix_do_futimes (this, pfd->fd, stbuf);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fsetattr (futimes) on failed fd=%p: %s", fd,
                                strerror (op_errno));
                        goto out;
                }
        }

        if (!valid) {
                op_ret = fchown (pfd->fd, -1, -1);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fchown (%d, -1, -1) failed => (%s)",
                                pfd->fd, strerror (op_errno));

                        goto out;
                }
        }

        op_ret = posix_fdstat (this, pfd->fd, &statpost);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fsetattr (fstat) failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (fsetattr, frame, op_ret, op_errno,
                             &statpre, &statpost, NULL);

        return 0;
}

static int32_t
posix_do_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags,
		   off_t offset, size_t len, struct iatt *statpre,
		   struct iatt *statpost)
{
        struct posix_fd *pfd = NULL;
        int32_t          ret = -1;

        DECLARE_OLD_FS_ID_VAR;

        SET_FS_ID (frame->root->uid, frame->root->gid);

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_DEBUG,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }

        ret = posix_fdstat (this, pfd->fd, statpre);
        if (ret == -1) {
                ret = -errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fallocate (fstat) failed on fd=%p: %s", fd,
                        strerror (errno));
                goto out;
        }

	ret = sys_fallocate(pfd->fd, flags, offset, len);
	if (ret == -1) {
		ret = -errno;
		goto out;
	}

        ret = posix_fdstat (this, pfd->fd, statpost);
        if (ret == -1) {
                ret = -errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fallocate (fstat) failed on fd=%p: %s", fd,
                        strerror (errno));
                goto out;
        }

out:
        SET_TO_OLD_FS_ID ();

        return ret;
}

char*
_page_aligned_alloc (size_t size, char **aligned_buf)
{
        char            *alloc_buf = NULL;
        char            *buf = NULL;

        alloc_buf = GF_CALLOC (1, (size + ALIGN_SIZE), gf_posix_mt_char);
        if (!alloc_buf)
                goto out;
        /* page aligned buffer */
        buf = GF_ALIGN_BUF (alloc_buf, ALIGN_SIZE);
        *aligned_buf = buf;
out:
        return alloc_buf;
}

static int32_t
_posix_do_zerofill(int fd, off_t offset, off_t len, int o_direct)
{
        off_t               num_vect            = 0;
        off_t               num_loop            = 1;
        off_t               idx                 = 0;
        int32_t             op_ret              = -1;
        int32_t             vect_size           = VECTOR_SIZE;
        off_t               remain              = 0;
        off_t               extra               = 0;
        struct iovec       *vector              = NULL;
        char               *iov_base            = NULL;
        char               *alloc_buf           = NULL;

        if (len == 0)
                return 0;
        if (len < VECTOR_SIZE)
                vect_size = len;

        num_vect = len / (vect_size);
        remain = len % vect_size ;
        if (num_vect > MAX_NO_VECT) {
                extra = num_vect % MAX_NO_VECT;
                num_loop = num_vect / MAX_NO_VECT;
                num_vect = MAX_NO_VECT;
        }

        vector = GF_CALLOC (num_vect, sizeof(struct iovec),
                             gf_common_mt_iovec);
        if (!vector)
                  return -1;
        if (o_direct) {
                alloc_buf = _page_aligned_alloc(vect_size, &iov_base);
                if (!alloc_buf) {
                        gf_log ("_posix_do_zerofill", GF_LOG_DEBUG,
                                 "memory alloc failed, vect_size %d: %s",
                                  vect_size, strerror(errno));
                        GF_FREE(vector);
                        return -1;
                }
        } else {
                iov_base = GF_CALLOC (vect_size, sizeof(char),
                                        gf_common_mt_char);
                if (!iov_base) {
                        GF_FREE(vector);
                        return -1;
                 }
        }

        for (idx = 0; idx < num_vect; idx++) {
                vector[idx].iov_base = iov_base;
                vector[idx].iov_len  = vect_size;
        }
        if (lseek(fd, offset, SEEK_SET) < 0) {
                op_ret = -1;
                goto err;
        }

        for (idx = 0; idx < num_loop; idx++) {
                op_ret = writev(fd, vector, num_vect);
                if (op_ret < 0)
                        goto err;
        }
        if (extra) {
                op_ret = writev(fd, vector, extra);
                if (op_ret < 0)
                        goto err;
        }
        if (remain) {
                vector[0].iov_len = remain;
                op_ret = writev(fd, vector , 1);
                if (op_ret < 0)
                        goto err;
        }
err:
        if (o_direct)
                GF_FREE(alloc_buf);
        else
                GF_FREE(iov_base);
        GF_FREE(vector);
        return op_ret;
}

static int32_t
posix_do_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd,
                  off_t offset, off_t len, struct iatt *statpre,
                  struct iatt *statpost)
{
        struct posix_fd *pfd       = NULL;
        int32_t          ret       = -1;

        DECLARE_OLD_FS_ID_VAR;

        SET_FS_ID (frame->root->uid, frame->root->gid);

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_DEBUG,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }

        ret = posix_fdstat (this, pfd->fd, statpre);
        if (ret == -1) {
                ret = -errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation fstat failed on fd = %p: %s", fd,
                        strerror (errno));
                goto out;
        }
        ret = _posix_do_zerofill(pfd->fd, offset, len, pfd->flags & O_DIRECT);
        if (ret < 0) {
                ret = -errno;
                gf_log(this->name, GF_LOG_ERROR,
                       "zerofill failed on fd %d length %" PRId64 " %s",
                        pfd->fd, len, strerror(errno));
                goto out;
        }
        if (pfd->flags & (O_SYNC|O_DSYNC)) {
                ret = fsync (pfd->fd);
                if (ret) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "fsync() in writev on fd %d failed: %s",
                        pfd->fd, strerror (errno));
                        ret = -errno;
                        goto out;
                }
        }

        ret = posix_fdstat (this, pfd->fd, statpost);
        if (ret == -1) {
                ret = -errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post operation fstat failed on fd=%p: %s", fd,
                        strerror (errno));
                goto out;
        }

out:
        SET_TO_OLD_FS_ID ();

        return ret;
}

static int32_t
_posix_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_size,
		off_t offset, size_t len, dict_t *xdata)
{
	int32_t ret;
	int32_t flags = 0;
        struct iatt statpre = {0,};
        struct iatt statpost = {0,};

#ifdef FALLOC_FL_KEEP_SIZE
	if (keep_size)
		flags = FALLOC_FL_KEEP_SIZE;
#endif /* FALLOC_FL_KEEP_SIZE */

	ret = posix_do_fallocate(frame, this, fd, flags, offset, len,
				 &statpre, &statpost);
	if (ret < 0)
		goto err;

	STACK_UNWIND_STRICT(fallocate, frame, 0, 0, &statpre, &statpost, NULL);
	return 0;

err:
	STACK_UNWIND_STRICT(fallocate, frame, -1, -ret, NULL, NULL, NULL);
	return 0;
}

static int32_t
posix_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
	      size_t len, dict_t *xdata)
{
	int32_t ret;
#ifndef FALLOC_FL_KEEP_SIZE
	ret = EOPNOTSUPP;

#else /* FALLOC_FL_KEEP_SIZE */
	int32_t flags = FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE;
        struct iatt statpre = {0,};
        struct iatt statpost = {0,};

	ret = posix_do_fallocate(frame, this, fd, flags, offset, len,
				 &statpre, &statpost);
	if (ret < 0)
		goto err;

	STACK_UNWIND_STRICT(discard, frame, 0, 0, &statpre, &statpost, NULL);
	return 0;

err:
#endif /* FALLOC_FL_KEEP_SIZE */
	STACK_UNWIND_STRICT(discard, frame, -1, -ret, NULL, NULL, NULL);
	return 0;
}

static int32_t
posix_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
                off_t len, dict_t *xdata)
{
        int32_t ret                      =  0;
        struct  iatt statpre             = {0,};
        struct  iatt statpost            = {0,};

        ret = posix_do_zerofill(frame, this, fd, offset, len,
                                 &statpre, &statpost);
        if (ret < 0)
                goto err;

        STACK_UNWIND_STRICT(zerofill, frame, 0, 0, &statpre, &statpost, NULL);
        return 0;

err:
        STACK_UNWIND_STRICT(zerofill, frame, -1, -ret, NULL, NULL, NULL);
        return 0;

}

int32_t
posix_opendir (call_frame_t *frame, xlator_t *this,
               loc_t *loc, fd_t *fd, dict_t *xdata)
{
        char *            real_path = NULL;
        int32_t           op_ret    = -1;
        int32_t           op_errno  = EINVAL;
        DIR *             dir       = NULL;
        struct posix_fd * pfd       = NULL;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);
        VALIDATE_OR_GOTO (fd, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_INODE_HANDLE (real_path, this, loc, NULL);

        op_ret = -1;
        dir = opendir (real_path);

        if (dir == NULL) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "opendir failed on %s: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = dirfd (dir);
        if (op_ret < 0) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "dirfd() failed on %s: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        pfd = GF_CALLOC (1, sizeof (*pfd), gf_posix_mt_posix_fd);
        if (!pfd) {
                op_errno = errno;
                goto out;
        }

        pfd->dir = dir;
        pfd->fd = dirfd (dir);

        op_ret = fd_ctx_set (fd, this, (uint64_t)(long)pfd);
        if (op_ret)
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set the fd context path=%s fd=%p",
                        real_path, fd);

        op_ret = 0;

out:
        if (op_ret == -1) {
                if (dir) {
                        closedir (dir);
                        dir = NULL;
                }
                if (pfd) {
                        GF_FREE (pfd);
                        pfd = NULL;
                }
        }

        SET_TO_OLD_FS_ID ();
        STACK_UNWIND_STRICT (opendir, frame, op_ret, op_errno, fd, NULL);
        return 0;
}

int32_t
posix_releasedir (xlator_t *this,
                  fd_t *fd)
{
        struct posix_fd * pfd      = NULL;
        uint64_t          tmp_pfd  = 0;
        int               ret      = 0;

        struct posix_private *priv = NULL;

        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        ret = fd_ctx_del (fd, this, &tmp_pfd);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_DEBUG,
                        "pfd from fd=%p is NULL", fd);
                goto out;
        }

        pfd = (struct posix_fd *)(long)tmp_pfd;
        if (!pfd->dir) {
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd->dir is NULL for fd=%p", fd);
                goto out;
        }

        priv = this->private;

        pthread_mutex_lock (&priv->janitor_lock);
        {
                INIT_LIST_HEAD (&pfd->list);
                list_add_tail (&pfd->list, &priv->janitor_fds);
                pthread_cond_signal (&priv->janitor_cond);
        }
        pthread_mutex_unlock (&priv->janitor_lock);

out:
        return 0;
}


int32_t
posix_readlink (call_frame_t *frame, xlator_t *this,
                loc_t *loc, size_t size, dict_t *xdata)
{
        char *  dest      = NULL;
        int32_t op_ret    = -1;
        int32_t op_errno  = 0;
        char *  real_path = NULL;
        struct iatt stbuf = {0,};

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

        dest = alloca (size + 1);

        MAKE_INODE_HANDLE (real_path, this, loc, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lstat on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        op_ret = sys_readlink (real_path, dest, size);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "readlink on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        dest[op_ret] = 0;
out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (readlink, frame, op_ret, op_errno, dest, &stbuf, NULL);

        return 0;
}


int
posix_mknod (call_frame_t *frame, xlator_t *this,
             loc_t *loc, mode_t mode, dev_t dev, mode_t umask, dict_t *xdata)
{
        int                   tmp_fd          = 0;
        int32_t               op_ret          = -1;
        int32_t               op_errno        = 0;
        char                 *real_path       = 0;
        char                 *par_path        = 0;
        struct iatt           stbuf           = { 0, };
        struct posix_private *priv            = NULL;
        gid_t                 gid             = 0;
        struct iatt           preparent       = {0,};
        struct iatt           postparent      = {0,};
        void *                uuid_req        = NULL;
        int32_t               nlink_samepgfid = 0;
        char                 *pgfid_xattr_key = NULL;
        gf_boolean_t          entry_created   = _gf_false, gfid_set = _gf_false;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, NULL);

        gid = frame->root->gid;

        SET_FS_ID (frame->root->uid, gid);

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent of %s failed: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        if (preparent.ia_prot.sgid) {
                gid = preparent.ia_gid;
        }

        /* Check if the 'gfid' already exists, because this mknod may be an
           internal call from distribute for creating 'linkfile', and that
           linkfile may be for a hardlinked file */
        if (dict_get (xdata, GLUSTERFS_INTERNAL_FOP_KEY)) {
                dict_del (xdata, GLUSTERFS_INTERNAL_FOP_KEY);
                op_ret = dict_get_ptr (xdata, "gfid-req", &uuid_req);
                if (op_ret) {
                        gf_log (this->name, GF_LOG_DEBUG,
                                "failed to get the gfid from dict for %s",
                                loc->path);
                        goto real_op;
                }
                op_ret = posix_create_link_if_gfid_exists (this, uuid_req,
                                                           real_path);
                if (!op_ret)
                        goto post_op;
        }

real_op:
#ifdef __NetBSD__
	if (S_ISFIFO(mode))
		op_ret = mkfifo (real_path, mode);
	else
#endif /* __NetBSD__ */
        op_ret = mknod (real_path, mode, dev);

        if (op_ret == -1) {
                op_errno = errno;
                if ((op_errno == EINVAL) && S_ISREG (mode)) {
                        /* Over Darwin, mknod with (S_IFREG|mode)
                           doesn't work */
                        tmp_fd = creat (real_path, mode);
                        if (tmp_fd == -1) {
                                gf_log (this->name, GF_LOG_ERROR,
                                        "create failed on %s: %s",
                                        real_path, strerror (errno));
                                goto out;
                        }
                        close (tmp_fd);
                } else {

                        gf_log (this->name, GF_LOG_ERROR,
                                "mknod on %s failed: %s", real_path,
                                strerror (op_errno));
                        goto out;
                }
        }

        entry_created = _gf_true;

        op_ret = posix_gfid_set (this, real_path, loc, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting gfid on %s failed", real_path);
        } else {
                gfid_set = _gf_true;
        }

#ifndef HAVE_SET_FSID
        op_ret = lchown (real_path, frame->root->uid, gid);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lchown on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }
#endif

post_op:
        op_ret = posix_acl_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting ACLs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        if (priv->update_pgfid_nlinks) {
                MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
                                      loc->pargfid);
                nlink_samepgfid = 1;

                SET_PGFID_XATTR (real_path, pgfid_xattr_key, nlink_samepgfid,
                                 XATTR_CREATE, op_ret, this, ignore);
        }

ignore:
        op_ret = posix_entry_create_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting xattrs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        op_ret = posix_pstat (this, NULL, real_path, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "mknod on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (mknod, frame, op_ret, op_errno,
                             (loc)?loc->inode:NULL, &stbuf, &preparent,
                             &postparent, NULL);

        if (op_ret < 0) {
                if (entry_created) {
                        if (S_ISREG (mode))
                                sys_unlink (real_path);
                        else
                                sys_rmdir (real_path);
                }

                if (gfid_set)
                        posix_gfid_unset (this, xdata);
        }

        return 0;
}

int
posix_mkdir (call_frame_t *frame, xlator_t *this,
             loc_t *loc, mode_t mode, mode_t umask, dict_t *xdata)
{
        int32_t               op_ret        = -1;
        int32_t               op_errno      = 0;
        char                 *real_path     = NULL, *gfid_path = NULL;
        char                 *par_path      = NULL;
        struct iatt           stbuf         = {0, };
        struct posix_private *priv          = NULL;
        gid_t                 gid           = 0;
        struct iatt           preparent     = {0,};
        struct iatt           postparent    = {0,};
        gf_boolean_t          entry_created = _gf_false, gfid_set = _gf_false;
        void                 *uuid_req      = NULL;
        ssize_t               size          = 0;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        /* The Hidden directory should be for housekeeping purpose and it
           should not get created from a user request */
        if (__is_root_gfid (loc->pargfid) &&
            (strcmp (loc->name, GF_HIDDEN_PATH) == 0)) {
                gf_log (this->name, GF_LOG_WARNING,
                        "mkdir issued on %s, which is not permitted",
                        GF_HIDDEN_PATH);
                op_errno = EPERM;
                op_ret = -1;
                goto out;
        }

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, NULL);

        gid = frame->root->gid;

        op_ret = posix_pstat (this, NULL, real_path, &stbuf);

        SET_FS_ID (frame->root->uid, gid);

        op_ret = dict_get_ptr (xdata, "gfid-req", &uuid_req);
        if (uuid_req && !uuid_is_null (uuid_req)) {
                op_ret = posix_istat (this, uuid_req, NULL, &stbuf);
                if ((op_ret == 0) && IA_ISDIR (stbuf.ia_type)) {
                        size = posix_handle_path (this, uuid_req, NULL, NULL,
                                                  0);
                        if (size > 0)
                                gfid_path = alloca (size);

                        if (gfid_path)
                                posix_handle_path (this, uuid_req, NULL,
                                                   gfid_path, size);

                        gf_log (this->name, GF_LOG_WARNING,
                                "mkdir (%s): gfid (%s) is already associated "
                                "with directory (%s). Hence, both directories "
                                "will share same gfid and this can lead to "
                                "inconsistencies.", loc->path,
                                uuid_utoa (uuid_req), gfid_path ? gfid_path
                                : "<NULL>");
                }
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        if (preparent.ia_prot.sgid) {
                gid = preparent.ia_gid;
                mode |= S_ISGID;
        }

        op_ret = mkdir (real_path, mode);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "mkdir of %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        entry_created = _gf_true;

        op_ret = posix_gfid_set (this, real_path, loc, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting gfid on %s failed", real_path);
        } else {
                gfid_set = _gf_true;
        }

#ifndef HAVE_SET_FSID
        op_ret = chown (real_path, frame->root->uid, gid);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "chown on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }
#endif
        op_ret = posix_acl_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting ACLs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        op_ret = posix_entry_create_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting xattrs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        op_ret = posix_pstat (this, NULL, real_path, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lstat on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent of %s failed: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (mkdir, frame, op_ret, op_errno,
                             (loc)?loc->inode:NULL, &stbuf, &preparent,
                             &postparent, NULL);

        if (op_ret < 0) {
                if (entry_created)
                        sys_rmdir (real_path);

                if (gfid_set)
                        posix_gfid_unset (this, xdata);
        }

        return 0;
}

int32_t
posix_unlink_gfid_handle_and_entry (xlator_t *this, const char *real_path,
                                    struct iatt *stbuf, int32_t *op_errno)
{
        int32_t             ret      =   0;

        /*  Unlink the gfid_handle_first */

        if (stbuf && stbuf->ia_nlink == 1) {
                ret = posix_handle_unset (this, stbuf->ia_gfid, NULL);
                if (ret) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "unlink of gfid handle failed for path:%s with"
                                " gfid %s with errno:%s", real_path,
                                uuid_utoa (stbuf->ia_gfid), strerror (errno));
                }
        }

        /* Unlink the actual file */
        ret = sys_unlink (real_path);
        if (ret == -1) {
                if (op_errno)
                        *op_errno = errno;

                gf_log (this->name, GF_LOG_ERROR,
                        "unlink of %s failed: %s", real_path,
                        strerror (errno));
                goto err;
        }

        return 0;

err:
        return -1;
}

int32_t
posix_unlink (call_frame_t *frame, xlator_t *this,
              loc_t *loc, int xflag, dict_t *xdata)
{
        int32_t                op_ret             = -1;
        int32_t                op_errno           = 0;
        char                   *real_path         = NULL;
        char                   *par_path          = NULL;
        int32_t                fd                 = -1;
        struct iatt            stbuf              = {0,};
        struct posix_private  *priv               = NULL;
        struct iatt            preparent          = {0,};
        struct iatt            postparent         = {0,};
        char                  *pgfid_xattr_key    = NULL;
        int32_t                nlink_samepgfid    = 0;
        int32_t                unlink_if_linkto   = 0;
        int32_t                check_open_fd      = 0;
        int32_t                skip_unlink        = 0;
        ssize_t                xattr_size         = -1;
        int32_t                is_dht_linkto_file = 0;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &stbuf);

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        priv = this->private;

        op_ret = dict_get_int32 (xdata, DHT_SKIP_OPEN_FD_UNLINK,
                                 &check_open_fd);

        if (!op_ret && check_open_fd) {

                LOCK (&loc->inode->lock);

                if (loc->inode->fd_count) {
                        skip_unlink = 1;
                }

                UNLOCK (&loc->inode->lock);

                gf_log (this->name, GF_LOG_INFO, "open-fd-key-status: "
                        "%"PRIu32" for %s", skip_unlink, real_path);

                if (skip_unlink) {
                        op_ret = -1;
                        op_errno = EBUSY;
                        goto out;
                }
        }


        op_ret = dict_get_int32 (xdata, DHT_SKIP_NON_LINKTO_UNLINK,
                                 &unlink_if_linkto);

        if (!op_ret && unlink_if_linkto) {

                LOCK (&loc->inode->lock);

                xattr_size = sys_lgetxattr (real_path, LINKTO, NULL, 0);

                if (xattr_size <= 0) {
                        skip_unlink = 1;
                } else {
                       is_dht_linkto_file =  IS_DHT_LINKFILE_MODE (&stbuf);
                       if (!is_dht_linkto_file)
                               skip_unlink = 1;
                }

                UNLOCK (&loc->inode->lock);

                gf_log (this->name, GF_LOG_INFO, "linkto_xattr status: "
                        "%"PRIu32" for %s", skip_unlink, real_path);

                if (skip_unlink) {
                        op_ret = -1;
                        op_errno = EBUSY;
                        goto out;
                }
        }


        if (priv->background_unlink) {
                if (IA_ISREG (loc->inode->ia_type)) {
                        fd = open (real_path, O_RDONLY);
                        if (fd == -1) {
                                op_ret = -1;
                                op_errno = errno;
                                gf_log (this->name, GF_LOG_ERROR,
                                        "open of %s failed: %s", real_path,
                                        strerror (op_errno));
                                goto out;
                        }
                }
        }

        if (priv->update_pgfid_nlinks && (stbuf.ia_nlink > 1)) {
                MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
                                      loc->pargfid);
                LOCK (&loc->inode->lock);
                {
                        UNLINK_MODIFY_PGFID_XATTR (real_path, pgfid_xattr_key,
                                                   nlink_samepgfid, 0, op_ret,
                                                   this, unlock);
                }
        unlock:
                UNLOCK (&loc->inode->lock);

                if (op_ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING, "modification of "
                                "parent gfid xattr failed (path:%s gfid:%s)",
                                real_path, uuid_utoa (loc->inode->gfid));
                        goto out;
                }
        }

        op_ret =  posix_unlink_gfid_handle_and_entry (this, real_path, &stbuf,
                                                      &op_errno);
        if (op_ret == -1) {
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (unlink, frame, op_ret, op_errno,
                             &preparent, &postparent, NULL);

        if (fd != -1) {
                close (fd);
        }

        return 0;
}


int
posix_rmdir (call_frame_t *frame, xlator_t *this,
             loc_t *loc, int flags, dict_t *xdata)
{
        int32_t op_ret    = -1;
        int32_t op_errno  = 0;
        char *  real_path = NULL;
        char *  par_path = NULL;
        char *  gfid_str = NULL;
        struct iatt   preparent = {0,};
        struct iatt   postparent = {0,};
        struct iatt   stbuf;
        struct posix_private    *priv      = NULL;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

        /* The Hidden directory should be for housekeeping purpose and it
           should not get deleted from inside process */
        if (__is_root_gfid (loc->pargfid) &&
            (strcmp (loc->name, GF_HIDDEN_PATH) == 0)) {
                gf_log (this->name, GF_LOG_WARNING,
                        "rmdir issued on %s, which is not permitted",
                        GF_HIDDEN_PATH);
                op_errno = EPERM;
                op_ret = -1;
                goto out;
        }

        priv = this->private;

        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &stbuf);

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        if (flags) {
                gfid_str = uuid_utoa (stbuf.ia_gfid);
                char *tmp_path = alloca (strlen (priv->trash_path) +
                                         strlen ("/") +
                                         strlen (gfid_str) + 1);

                mkdir (priv->trash_path, 0755);
                sprintf (tmp_path, "%s/%s", priv->trash_path, gfid_str);
                op_ret = rename (real_path, tmp_path);
        } else {
                op_ret = rmdir (real_path);
        }
        op_errno = errno;

        if (op_ret == 0) {
                posix_handle_unset (this, stbuf.ia_gfid, NULL);
        }

        if (op_errno == EEXIST)
                /* Solaris sets errno = EEXIST instead of ENOTEMPTY */
                op_errno = ENOTEMPTY;

        /* No need to log a common error as ENOTEMPTY */
        if (op_ret == -1 && op_errno != ENOTEMPTY) {
                gf_log (this->name, GF_LOG_ERROR,
                        "rmdir of %s failed: %s", real_path,
                        strerror (op_errno));
        }

        if (op_ret == -1) {
                gf_log (this->name,
                        (op_errno == ENOTEMPTY) ? GF_LOG_DEBUG : GF_LOG_ERROR,
                        "%s on %s failed", (flags) ? "rename" : "rmdir",
                        real_path);
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent of %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (rmdir, frame, op_ret, op_errno,
                             &preparent, &postparent, NULL);

        return 0;
}


int
posix_symlink (call_frame_t *frame, xlator_t *this,
               const char *linkname, loc_t *loc, mode_t umask, dict_t *xdata)
{
        int32_t               op_ret          = -1;
        int32_t               op_errno        = 0;
        char *                real_path       = 0;
        char *                par_path        = 0;
        struct iatt           stbuf           = { 0, };
        struct posix_private *priv            = NULL;
        gid_t                 gid             = 0;
        struct iatt           preparent       = {0,};
        struct iatt           postparent      = {0,};
        char                 *pgfid_xattr_key = NULL;
        int32_t               nlink_samepgfid = 0;
        gf_boolean_t          entry_created   = _gf_false, gfid_set = _gf_false;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (linkname, out);
        VALIDATE_OR_GOTO (loc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &stbuf);

        SET_FS_ID (frame->root->uid, gid);

        gid = frame->root->gid;

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        if (preparent.ia_prot.sgid) {
                gid = preparent.ia_gid;
        }

        op_ret = symlink (linkname, real_path);

        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "symlink of %s --> %s failed: %s",
                        real_path, linkname, strerror (op_errno));
                goto out;
        }

        entry_created = _gf_true;

        op_ret = posix_gfid_set (this, real_path, loc, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting gfid on %s failed", real_path);
        } else {
                gfid_set = _gf_true;
        }

#ifndef HAVE_SET_FSID
        op_ret = lchown (real_path, frame->root->uid, gid);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lchown failed on %s: %s",
                        real_path, strerror (op_errno));
                goto out;
        }
#endif
        op_ret = posix_acl_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting ACLs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        if (priv->update_pgfid_nlinks) {
                MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
                                      loc->pargfid);
                nlink_samepgfid = 1;
                SET_PGFID_XATTR (real_path, pgfid_xattr_key, nlink_samepgfid,
                                 XATTR_CREATE, op_ret, this, ignore);
        }
ignore:
        op_ret = posix_entry_create_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting xattrs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        op_ret = posix_pstat (this, NULL, real_path, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lstat failed on %s: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (symlink, frame, op_ret, op_errno,
                             (loc)?loc->inode:NULL, &stbuf, &preparent,
                             &postparent, NULL);

        if (op_ret < 0) {
                if (entry_created)
                        sys_unlink (real_path);

                if (gfid_set)
                        posix_gfid_unset (this, xdata);
        }

        return 0;
}


int
posix_rename (call_frame_t *frame, xlator_t *this,
              loc_t *oldloc, loc_t *newloc, dict_t *xdata)
{
        int32_t               op_ret          = -1;
        int32_t               op_errno        = 0;
        char                 *real_oldpath    = NULL;
        char                 *real_newpath    = NULL;
        char                 *par_oldpath     = NULL;
        char                 *par_newpath     = NULL;
        struct iatt           stbuf           = {0, };
        struct posix_private *priv            = NULL;
        char                  was_present     = 1;
        struct iatt           preoldparent    = {0, };
        struct iatt           postoldparent   = {0, };
        struct iatt           prenewparent    = {0, };
        struct iatt           postnewparent   = {0, };
        char                  olddirid[64];
        char                  newdirid[64];
        uuid_t                victim          = {0};
        int                   was_dir         = 0;
        int                   nlink           = 0;
        char                 *pgfid_xattr_key = NULL;
        int32_t               nlink_samepgfid = 0;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (oldloc, out);
        VALIDATE_OR_GOTO (newloc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_ENTRY_HANDLE (real_oldpath, par_oldpath, this, oldloc, NULL);
        MAKE_ENTRY_HANDLE (real_newpath, par_newpath, this, newloc, &stbuf);

        op_ret = posix_pstat (this, oldloc->pargfid, par_oldpath, &preoldparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_oldpath, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, newloc->pargfid, par_newpath, &prenewparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent of %s failed: %s",
                        par_newpath, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, NULL, real_newpath, &stbuf);
        if ((op_ret == -1) && (errno == ENOENT)){
                was_present = 0;
        } else {
                uuid_copy (victim, stbuf.ia_gfid);
                if (IA_ISDIR (stbuf.ia_type))
                        was_dir = 1;
                nlink = stbuf.ia_nlink;
        }

        if (was_present && IA_ISDIR(stbuf.ia_type) && !newloc->inode) {
                gf_log (this->name, GF_LOG_WARNING,
                        "found directory at %s while expecting ENOENT",
                        real_newpath);
                op_ret = -1;
                op_errno = EEXIST;
                goto out;
        }

        if (was_present && IA_ISDIR(stbuf.ia_type) &&
            uuid_compare (newloc->inode->gfid, stbuf.ia_gfid)) {
                gf_log (this->name, GF_LOG_WARNING,
                        "found directory %s at %s while renaming %s",
                        uuid_utoa_r (newloc->inode->gfid, olddirid),
                        real_newpath,
                        uuid_utoa_r (stbuf.ia_gfid, newdirid));
                op_ret = -1;
                op_errno = EEXIST;
                goto out;
        }

        if (IA_ISDIR (oldloc->inode->ia_type))
                posix_handle_unset (this, oldloc->inode->gfid, NULL);

        LOCK (&oldloc->inode->lock);
        {
                if (!IA_ISDIR (oldloc->inode->ia_type)
                    && priv->update_pgfid_nlinks) {
                        MAKE_PGFID_XATTR_KEY (pgfid_xattr_key,
                                              PGFID_XATTR_KEY_PREFIX,
                                              oldloc->pargfid);
                        UNLINK_MODIFY_PGFID_XATTR (real_oldpath,
                                                   pgfid_xattr_key,
                                                   nlink_samepgfid, 0,
                                                   op_ret,
                                                   this, unlock);
                }

                op_ret = sys_rename (real_oldpath, real_newpath);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name,
                                (op_errno == ENOTEMPTY ? GF_LOG_DEBUG
                                 : GF_LOG_ERROR),
                                "rename of %s to %s failed: %s",
                                real_oldpath, real_newpath,
                                strerror (op_errno));

                        if (priv->update_pgfid_nlinks
                            && !IA_ISDIR (oldloc->inode->ia_type)) {
                                LINK_MODIFY_PGFID_XATTR (real_oldpath,
                                                         pgfid_xattr_key,
                                                         nlink_samepgfid, 0,
                                                         op_ret,
                                                         this, unlock);
                        }

                        goto unlock;
                }

                if (!IA_ISDIR (oldloc->inode->ia_type)
                    && priv->update_pgfid_nlinks) {
                        MAKE_PGFID_XATTR_KEY (pgfid_xattr_key,
                                              PGFID_XATTR_KEY_PREFIX,
                                              newloc->pargfid);
                        LINK_MODIFY_PGFID_XATTR (real_newpath,
                                                 pgfid_xattr_key,
                                                 nlink_samepgfid, 0,
                                                 op_ret,
                                                 this, unlock);
                }
        }
unlock:
        UNLOCK (&oldloc->inode->lock);

        if (op_ret < 0) {
                gf_log (this->name, GF_LOG_WARNING, "modification of "
                        "parent gfid xattr failed (gfid:%s)",
                        uuid_utoa (oldloc->inode->gfid));
                goto out;
        }

        if (was_dir)
                posix_handle_unset (this, victim, NULL);

        if (was_present && !was_dir && nlink == 1)
                posix_handle_unset (this, victim, NULL);

        if (IA_ISDIR (oldloc->inode->ia_type)) {
                posix_handle_soft (this, real_newpath, newloc,
                                   oldloc->inode->gfid, NULL);
        }

        op_ret = posix_pstat (this, NULL, real_newpath, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lstat on %s failed: %s",
                        real_newpath, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, oldloc->pargfid, par_oldpath, &postoldparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_oldpath, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, newloc->pargfid, par_newpath, &postnewparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_newpath, strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:

        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (rename, frame, op_ret, op_errno, &stbuf,
                             &preoldparent, &postoldparent,
                             &prenewparent, &postnewparent, NULL);

        return 0;
}


int
posix_link (call_frame_t *frame, xlator_t *this,
            loc_t *oldloc, loc_t *newloc, dict_t *xdata)
{
        int32_t               op_ret          = -1;
        int32_t               op_errno        = 0;
        char                 *real_oldpath    = 0;
        char                 *real_newpath    = 0;
        char                 *par_newpath     = 0;
        struct iatt           stbuf           = {0, };
        struct posix_private *priv            = NULL;
        struct iatt           preparent       = {0,};
        struct iatt           postparent      = {0,};
        int32_t               nlink_samepgfid = 0;
        char                 *pgfid_xattr_key = NULL;
        gf_boolean_t          entry_created   = _gf_false;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (oldloc, out);
        VALIDATE_OR_GOTO (newloc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_INODE_HANDLE (real_oldpath, this, oldloc, &stbuf);

        MAKE_ENTRY_HANDLE (real_newpath, par_newpath, this, newloc, &stbuf);

        op_ret = posix_pstat (this, newloc->pargfid, par_newpath, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR, "lstat failed: %s: %s",
                        par_newpath, strerror (op_errno));
                goto out;
        }


        op_ret = sys_link (real_oldpath, real_newpath);

        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "link %s to %s failed: %s",
                        real_oldpath, real_newpath, strerror (op_errno));
                goto out;
        }

        entry_created = _gf_true;

        op_ret = posix_pstat (this, NULL, real_newpath, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "lstat on %s failed: %s",
                        real_newpath, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, newloc->pargfid, par_newpath, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR, "lstat failed: %s: %s",
                        par_newpath, strerror (op_errno));
                goto out;
        }

        if (priv->update_pgfid_nlinks) {
                MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
                                      newloc->pargfid);

                LOCK (&newloc->inode->lock);
                {
                        LINK_MODIFY_PGFID_XATTR (real_newpath, pgfid_xattr_key,
                                                 nlink_samepgfid, 0, op_ret,
                                                 this, unlock);
                }
        unlock:
                UNLOCK (&newloc->inode->lock);

                if (op_ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING, "modification of "
                                "parent gfid xattr failed (path:%s gfid:%s)",
                                real_newpath, uuid_utoa (newloc->inode->gfid));
                        goto out;
                }
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (link, frame, op_ret, op_errno,
                             (oldloc)?oldloc->inode:NULL, &stbuf, &preparent,
                             &postparent, NULL);

        if (op_ret < 0) {
                if (entry_created)
                        sys_unlink (real_newpath);
        }

        return 0;
}


int32_t
posix_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
                dict_t *xdata)
{
        int32_t               op_ret    = -1;
        int32_t               op_errno  = 0;
        char                 *real_path = 0;
        struct posix_private *priv      = NULL;
        struct iatt           prebuf    = {0,};
        struct iatt           postbuf   = {0,};

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

        MAKE_INODE_HANDLE (real_path, this, loc, &prebuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on %s failed: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = truncate (real_path, offset);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "truncate on %s failed: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, loc->gfid, real_path, &postbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR, "lstat on %s failed: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        op_ret = 0;
out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (truncate, frame, op_ret, op_errno,
                             &prebuf, &postbuf, NULL);

        return 0;
}


int
posix_create (call_frame_t *frame, xlator_t *this,
              loc_t *loc, int32_t flags, mode_t mode,
              mode_t umask, fd_t *fd, dict_t *xdata)
{
        int32_t                op_ret          = -1;
        int32_t                op_errno        = 0;
        int32_t                _fd             = -1;
        int                    _flags          = 0;
        char *                 real_path       = NULL;
        char *                 par_path        = NULL;
        struct iatt            stbuf           = {0, };
        struct posix_fd *      pfd             = NULL;
        struct posix_private * priv            = NULL;
        char                   was_present     = 1;

        gid_t                  gid             = 0;
        struct iatt            preparent       = {0,};
        struct iatt            postparent      = {0,};

        int                    nlink_samepgfid = 0;
        char *                 pgfid_xattr_key = NULL;
        gf_boolean_t           entry_created   = _gf_false, gfid_set = _gf_false;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (this->private, out);
        VALIDATE_OR_GOTO (loc, out);
        VALIDATE_OR_GOTO (fd, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &stbuf);

        gid = frame->root->gid;

        SET_FS_ID (frame->root->uid, gid);

        op_ret = posix_pstat (this, loc->pargfid, par_path, &preparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        if (preparent.ia_prot.sgid) {
                gid = preparent.ia_gid;
        }

        if (!flags) {
                _flags = O_CREAT | O_RDWR | O_EXCL;
        }
        else {
                _flags = flags | O_CREAT;
        }

        op_ret = posix_pstat (this, NULL, real_path, &stbuf);
        if ((op_ret == -1) && (errno == ENOENT)) {
                was_present = 0;
        }

        if (priv->o_direct)
                _flags |= O_DIRECT;

        _fd = open (real_path, _flags, mode);

        if (_fd == -1) {
                op_errno = errno;
                op_ret = -1;
                gf_log (this->name, GF_LOG_ERROR,
                        "open on %s failed: %s", real_path,
                        strerror (op_errno));
                goto out;
        }

        if ((_flags & O_CREAT) && (_flags & O_EXCL)) {
                entry_created = _gf_true;
        }


        if (was_present)
                goto fill_stat;

        op_ret = posix_gfid_set (this, real_path, loc, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting gfid on %s failed", real_path);
        } else {
                gfid_set = _gf_true;
        }

#ifndef HAVE_SET_FSID
        op_ret = chown (real_path, frame->root->uid, gid);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "chown on %s failed: %s",
                        real_path, strerror (op_errno));
        }
#endif
        op_ret = posix_acl_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting ACLs on %s failed (%s)", real_path,
                        strerror (errno));
        }

        if (priv->update_pgfid_nlinks) {
                MAKE_PGFID_XATTR_KEY (pgfid_xattr_key, PGFID_XATTR_KEY_PREFIX,
                                      loc->pargfid);
                nlink_samepgfid = 1;
                SET_PGFID_XATTR (real_path, pgfid_xattr_key, nlink_samepgfid,
                                 XATTR_CREATE, op_ret, this, ignore);
        }
ignore:
        op_ret = posix_entry_create_xattr_set (this, real_path, xdata);
        if (op_ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "setting xattrs on %s failed (%s)", real_path,
                        strerror (errno));
        }

fill_stat:
        op_ret = posix_fdstat (this, _fd, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fstat on %d failed: %s", _fd, strerror (op_errno));
                goto out;
        }

        op_ret = posix_pstat (this, loc->pargfid, par_path, &postparent);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "post-operation lstat on parent %s failed: %s",
                        par_path, strerror (op_errno));
                goto out;
        }

        op_ret = -1;
        pfd = GF_CALLOC (1, sizeof (*pfd), gf_posix_mt_posix_fd);
        if (!pfd) {
                op_errno = errno;
                goto out;
        }

        pfd->flags = flags;
        pfd->fd    = _fd;

        op_ret = fd_ctx_set (fd, this, (uint64_t)(long)pfd);
        if (op_ret)
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set the fd context path=%s fd=%p",
                        real_path, fd);

        LOCK (&priv->lock);
        {
                priv->nr_files++;
        }
        UNLOCK (&priv->lock);

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        if ((-1 == op_ret) && (_fd != -1)) {
                close (_fd);
        }

        STACK_UNWIND_STRICT (create, frame, op_ret, op_errno,
                             fd, (loc)?loc->inode:NULL, &stbuf, &preparent,
                             &postparent, xdata);

        if (op_ret < 0) {
                if (entry_created)
                        sys_unlink (real_path);

                if (gfid_set)
                        posix_gfid_unset (this, xdata);
        }

        return 0;
}

int32_t
posix_open (call_frame_t *frame, xlator_t *this,
            loc_t *loc, int32_t flags, fd_t *fd, dict_t *xdata)
{
        int32_t               op_ret       = -1;
        int32_t               op_errno     = 0;
        char                 *real_path    = NULL;
        int32_t               _fd          = -1;
        struct posix_fd      *pfd          = NULL;
        struct posix_private *priv         = NULL;
        struct iatt           stbuf        = {0, };

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (this->private, out);
        VALIDATE_OR_GOTO (loc, out);
        VALIDATE_OR_GOTO (fd, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        MAKE_INODE_HANDLE (real_path, this, loc, &stbuf);

        if (IA_ISLNK (stbuf.ia_type)) {
                op_ret = -1;
                op_errno = ELOOP;
                goto out;
        }

        op_ret = -1;
        SET_FS_ID (frame->root->uid, frame->root->gid);

        if (priv->o_direct)
                flags |= O_DIRECT;

        _fd = open (real_path, flags, 0);
        if (_fd == -1) {
                op_ret   = -1;
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR, "open on %s, flags: %d: %s",
                        real_path, flags, strerror (op_errno));
                goto out;
        }

        pfd = GF_CALLOC (1, sizeof (*pfd), gf_posix_mt_posix_fd);
        if (!pfd) {
                op_errno = errno;
                goto out;
        }

        pfd->flags = flags;
        pfd->fd    = _fd;

        op_ret = fd_ctx_set (fd, this, (uint64_t)(long)pfd);
        if (op_ret)
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set the fd context path=%s fd=%p",
                        real_path, fd);

        LOCK (&priv->lock);
        {
                priv->nr_files++;
        }
        UNLOCK (&priv->lock);

        op_ret = 0;

out:
        if (op_ret == -1) {
                if (_fd != -1) {
                        close (_fd);
                }
        }

        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd, NULL);

        return 0;
}

int
posix_readv (call_frame_t *frame, xlator_t *this,
             fd_t *fd, size_t size, off_t offset, uint32_t flags, dict_t *xdata)
{
        int32_t                op_ret     = -1;
        int32_t                op_errno   = 0;
        int                    _fd        = -1;
        struct posix_private * priv       = NULL;
        struct iobuf         * iobuf      = NULL;
        struct iobref        * iobref     = NULL;
        struct iovec           vec        = {0,};
        struct posix_fd *      pfd        = NULL;
        struct iatt            stbuf      = {0,};
        int                    ret        = -1;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);
        VALIDATE_OR_GOTO (this->private, out);

        priv = this->private;
        VALIDATE_OR_GOTO (priv, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                op_errno = -ret;
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }

        if (!size) {
                op_errno = EINVAL;
                gf_log (this->name, GF_LOG_WARNING, "size=%"GF_PRI_SIZET, size);
                goto out;
        }

        iobuf = iobuf_get2 (this->ctx->iobuf_pool, size);
        if (!iobuf) {
                op_errno = ENOMEM;
                goto out;
        }

        _fd = pfd->fd;
        op_ret = pread (_fd, iobuf->ptr, size, offset);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "read failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        LOCK (&priv->lock);
        {
                priv->read_value    += op_ret;
        }
        UNLOCK (&priv->lock);

        vec.iov_base = iobuf->ptr;
        vec.iov_len  = op_ret;

        iobref = iobref_new ();

        iobref_add (iobref, iobuf);

        /*
         *  readv successful, and we need to get the stat of the file
         *  we read from
         */

        op_ret = posix_fdstat (this, _fd, &stbuf);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "fstat failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        /* Hack to notify higher layers of EOF. */
        if (!stbuf.ia_size || (offset + vec.iov_len) >= stbuf.ia_size)
                op_errno = ENOENT;

        op_ret = vec.iov_len;
out:

        STACK_UNWIND_STRICT (readv, frame, op_ret, op_errno,
                             &vec, 1, &stbuf, iobref, NULL);

        if (iobref)
                iobref_unref (iobref);
        if (iobuf)
                iobuf_unref (iobuf);

        return 0;
}


int32_t
__posix_pwritev (int fd, struct iovec *vector, int count, off_t offset)
{
        int32_t         op_ret = 0;
        int             idx = 0;
        int             retval = 0;
        off_t           internal_off = 0;

        if (!vector)
                return -EFAULT;

        internal_off = offset;
        for (idx = 0; idx < count; idx++) {
                retval = pwrite (fd, vector[idx].iov_base, vector[idx].iov_len,
                                 internal_off);
                if (retval == -1) {
                        op_ret = -errno;
                        goto err;
                }
                op_ret += retval;
                internal_off += retval;
        }

err:
        return op_ret;
}

int32_t
__posix_writev (int fd, struct iovec *vector, int count, off_t startoff,
                int odirect)
{
        int32_t         op_ret = 0;
        int             idx = 0;
        int             max_buf_size = 0;
        int             retval = 0;
        char            *buf = NULL;
        char            *alloc_buf = NULL;
        off_t           internal_off = 0;

        /* Check for the O_DIRECT flag during open() */
        if (!odirect)
                return __posix_pwritev (fd, vector, count, startoff);

        for (idx = 0; idx < count; idx++) {
                if (max_buf_size < vector[idx].iov_len)
                        max_buf_size = vector[idx].iov_len;
        }

        alloc_buf = _page_aligned_alloc (max_buf_size, &buf);
        if (!alloc_buf) {
                op_ret = -errno;
                goto err;
        }

        internal_off = startoff;
        for (idx = 0; idx < count; idx++) {
                memcpy (buf, vector[idx].iov_base, vector[idx].iov_len);

                /* not sure whether writev works on O_DIRECT'd fd */
                retval = pwrite (fd, buf, vector[idx].iov_len, internal_off);
                if (retval == -1) {
                        op_ret = -errno;
                        goto err;
                }

                op_ret += retval;
                internal_off += retval;
        }

err:
        GF_FREE (alloc_buf);

        return op_ret;
}

dict_t*
_fill_writev_xdata (fd_t *fd, dict_t *xdata, xlator_t *this, int is_append)
{
        dict_t  *rsp_xdata = NULL;
        int32_t ret = 0;
        inode_t *inode = NULL;

        if (fd)
                inode = fd->inode;

        if (!fd || !fd->inode || uuid_is_null (fd->inode->gfid)) {
                gf_log_callingfn (this->name, GF_LOG_ERROR, "Invalid Args: "
                                  "fd: %p inode: %p gfid:%s", fd, inode?inode:0,
                                  inode?uuid_utoa(inode->gfid):"N/A");
                goto out;
        }

        if (!xdata || !dict_get (xdata, GLUSTERFS_OPEN_FD_COUNT))
                goto out;

        rsp_xdata = dict_new();
        if (!rsp_xdata)
                goto out;

        ret = dict_set_uint32 (rsp_xdata, GLUSTERFS_OPEN_FD_COUNT,
                               fd->inode->fd_count);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_WARNING, "%s: Failed to set "
                        "dictionary value for %s", uuid_utoa (fd->inode->gfid),
                        GLUSTERFS_OPEN_FD_COUNT);
        }

        ret = dict_set_uint32 (rsp_xdata, GLUSTERFS_WRITE_IS_APPEND,
                               is_append);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_WARNING, "%s: Failed to set "
                        "dictionary value for %s", uuid_utoa (fd->inode->gfid),
                        GLUSTERFS_WRITE_IS_APPEND);
        }
out:
        return rsp_xdata;
}

int32_t
posix_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
              struct iovec *vector, int32_t count, off_t offset,
              uint32_t flags, struct iobref *iobref, dict_t *xdata)
{
        int32_t                op_ret   = -1;
        int32_t                op_errno = 0;
        int                    _fd      = -1;
        struct posix_private * priv     = NULL;
        struct posix_fd *      pfd      = NULL;
        struct iatt            preop    = {0,};
        struct iatt            postop    = {0,};
        int                      ret      = -1;
        dict_t                *rsp_xdata = NULL;
	int                    is_append = 0;
	gf_boolean_t           locked = _gf_false;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);
        VALIDATE_OR_GOTO (vector, out);
        VALIDATE_OR_GOTO (this->private, out);

        priv = this->private;

        VALIDATE_OR_GOTO (priv, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd is NULL from fd=%p", fd);
                op_errno = -ret;
                goto out;
        }

        _fd = pfd->fd;

	if (xdata && dict_get (xdata, GLUSTERFS_WRITE_IS_APPEND)) {
		/* The write_is_append check and write must happen
		   atomically. Else another write can overtake this
		   write after the check and get written earlier.

		   So lock before preop-stat and unlock after write.
		*/
		locked = _gf_true;
		LOCK(&fd->inode->lock);
	}

        op_ret = posix_fdstat (this, _fd, &preop);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "pre-operation fstat failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

	if (locked) {
		if (preop.ia_size == offset || (fd->flags & O_APPEND))
			is_append = 1;
	}

        op_ret = __posix_writev (_fd, vector, count, offset,
                                 (pfd->flags & O_DIRECT));

	if (locked) {
		UNLOCK (&fd->inode->lock);
		locked = _gf_false;
	}

        if (op_ret < 0) {
                op_errno = -op_ret;
                op_ret = -1;
                gf_log (this->name, GF_LOG_ERROR, "write failed: offset %"PRIu64
                        ", %s", offset, strerror (op_errno));
                goto out;
        }

        LOCK (&priv->lock);
        {
                priv->write_value    += op_ret;
        }
        UNLOCK (&priv->lock);

        if (op_ret >= 0) {
                rsp_xdata = _fill_writev_xdata (fd, xdata, this, is_append);
                /* wiretv successful, we also need to get the stat of
                 * the file we wrote to
                 */

                if (flags & (O_SYNC|O_DSYNC)) {
                        ret = fsync (_fd);
			if (ret) {
				gf_log (this->name, GF_LOG_ERROR,
					"fsync() in writev on fd %d failed: %s",
					_fd, strerror (errno));
				op_ret = -1;
				op_errno = errno;
				goto out;
			}
                }

                ret = posix_fdstat (this, _fd, &postop);
                if (ret == -1) {
                        op_ret = -1;
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "post-operation fstat failed on fd=%p: %s",
                                fd, strerror (op_errno));
                        goto out;
                }
        }

out:

	if (locked) {
		UNLOCK (&fd->inode->lock);
		locked = _gf_false;
	}

        STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, &preop, &postop,
                             rsp_xdata);

        if (rsp_xdata)
                dict_unref (rsp_xdata);
        return 0;
}


int32_t
posix_statfs (call_frame_t *frame, xlator_t *this,
              loc_t *loc, dict_t *xdata)
{
        char *                 real_path = NULL;
        int32_t                op_ret    = -1;
        int32_t                op_errno  = 0;
        struct statvfs         buf       = {0, };
        struct posix_private * priv      = NULL;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);
        VALIDATE_OR_GOTO (this->private, out);

        MAKE_INODE_HANDLE (real_path, this, loc, NULL);

        priv = this->private;

        op_ret = statvfs (real_path, &buf);

        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_ERROR,
                        "statvfs failed on %s: %s",
                        real_path, strerror (op_errno));
                goto out;
        }

        if (!priv->export_statfs) {
                buf.f_blocks = 0;
                buf.f_bfree  = 0;
                buf.f_bavail = 0;
                buf.f_files  = 0;
                buf.f_ffree  = 0;
                buf.f_favail = 0;
        }

        op_ret = 0;

out:
        STACK_UNWIND_STRICT (statfs, frame, op_ret, op_errno, &buf, NULL);
        return 0;
}


int32_t
posix_flush (call_frame_t *frame, xlator_t *this,
             fd_t *fd, dict_t *xdata)
{
        int32_t           op_ret   = -1;
        int32_t           op_errno = 0;
        int               ret      = -1;
        struct posix_fd  *pfd      = NULL;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                op_errno = -ret;
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd is NULL on fd=%p", fd);
                goto out;
        }

        op_ret = 0;

out:
        STACK_UNWIND_STRICT (flush, frame, op_ret, op_errno, NULL);

        return 0;
}


int32_t
posix_release (xlator_t *this, fd_t *fd)
{
        struct posix_private * priv     = NULL;
        struct posix_fd *      pfd      = NULL;
        int                    ret      = -1;
        uint64_t               tmp_pfd  = 0;

        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        priv = this->private;

        ret = fd_ctx_del (fd, this, &tmp_pfd);
        if (ret < 0) {
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }
        pfd = (struct posix_fd *)(long)tmp_pfd;

        if (pfd->dir) {
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd->dir is %p (not NULL) for file fd=%p",
                        pfd->dir, fd);
        }

        pthread_mutex_lock (&priv->janitor_lock);
        {
                INIT_LIST_HEAD (&pfd->list);
                list_add_tail (&pfd->list, &priv->janitor_fds);
                pthread_cond_signal (&priv->janitor_cond);
        }
        pthread_mutex_unlock (&priv->janitor_lock);

        LOCK (&priv->lock);
        {
                priv->nr_files--;
        }
        UNLOCK (&priv->lock);

out:
        return 0;
}


int
posix_batch_fsync (call_frame_t *frame, xlator_t *this,
		     fd_t *fd, int datasync, dict_t *xdata)
{
	call_stub_t *stub = NULL;
	struct posix_private *priv = NULL;

	priv = this->private;

	stub = fop_fsync_stub (frame, default_fsync, fd, datasync, xdata);
	if (!stub) {
		STACK_UNWIND_STRICT (fsync, frame, -1, ENOMEM, 0, 0, 0);
		return 0;
	}

	pthread_mutex_lock (&priv->fsync_mutex);
	{
		list_add_tail (&stub->list, &priv->fsyncs);
		priv->fsync_queue_count++;
		pthread_cond_signal (&priv->fsync_cond);
	}
	pthread_mutex_unlock (&priv->fsync_mutex);

	return 0;
}


int32_t
posix_fsync (call_frame_t *frame, xlator_t *this,
             fd_t *fd, int32_t datasync, dict_t *xdata)
{
        int32_t           op_ret   = -1;
        int32_t           op_errno = 0;
        int               _fd      = -1;
        struct posix_fd * pfd      = NULL;
        int               ret      = -1;
        struct iatt       preop = {0,};
        struct iatt       postop = {0,};
        struct posix_private *priv = NULL;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

#ifdef GF_DARWIN_HOST_OS
        /* Always return success in case of fsync in MAC OS X */
        op_ret = 0;
        goto out;
#endif

	priv = this->private;
	if (priv->batch_fsync_mode && xdata && dict_get (xdata, "batch-fsync")) {
		posix_batch_fsync (frame, this, fd, datasync, xdata);
		return 0;
	}

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                op_errno = -ret;
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd not found in fd's ctx");
                goto out;
        }

        _fd = pfd->fd;

        op_ret = posix_fdstat (this, _fd, &preop);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_WARNING,
                        "pre-operation fstat failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        if (datasync) {
                op_ret = sys_fdatasync (_fd);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fdatasync on fd=%p failed: %s",
                                fd, strerror (errno));
                        goto out;
                }
        } else {
                op_ret = sys_fsync (_fd);
                if (op_ret == -1) {
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "fsync on fd=%p failed: %s",
                                fd, strerror (op_errno));
                        goto out;
                }
        }

        op_ret = posix_fdstat (this, _fd, &postop);
        if (op_ret == -1) {
                op_errno = errno;
                gf_log (this->name, GF_LOG_WARNING,
                        "post-operation fstat failed on fd=%p: %s", fd,
                        strerror (op_errno));
                goto out;
        }

        op_ret = 0;

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (fsync, frame, op_ret, op_errno, &preop, &postop,
                             NULL);

        return 0;
}

static int gf_posix_xattr_enotsup_log;
static int
_handle_setxattr_keyvalue_pair (dict_t *d, char *k, data_t *v,
                                void *tmp)
{
        posix_xattr_filler_t *filler = NULL;

        filler = tmp;

        return posix_handle_pair (filler->this, filler->real_path, k, v,
                                  filler->flags);
}

#ifdef GF_DARWIN_HOST_OS
static inline int
map_xattr_flags(int flags)
{
        /* DARWIN has different defines on XATTR_ flags.
           There do not seem to be a POSIX standard
           Parse any other flags over.
        */
        int darwinflags = flags & ~(GF_XATTR_CREATE | GF_XATTR_REPLACE | XATTR_REPLACE);
        if (GF_XATTR_CREATE & flags)
                darwinflags |= XATTR_CREATE;
        if (GF_XATTR_REPLACE & flags)
                darwinflags |= XATTR_REPLACE;
        return darwinflags;
}
#endif

int32_t
posix_setxattr (call_frame_t *frame, xlator_t *this,
                loc_t *loc, dict_t *dict, int flags, dict_t *xdata)
{
        int32_t       op_ret                  = -1;
        int32_t       op_errno                = 0;
        char *        real_path               = NULL;

        posix_xattr_filler_t filler = {0,};

        DECLARE_OLD_FS_ID_VAR;
        SET_FS_ID (frame->root->uid, frame->root->gid);

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);
        VALIDATE_OR_GOTO (dict, out);

        MAKE_INODE_HANDLE (real_path, this, loc, NULL);

        op_ret = -1;
        dict_del (dict, GFID_XATTR_KEY);
        dict_del (dict, GF_XATTR_VOL_ID_KEY);

        filler.real_path = real_path;
        filler.this = this;
#ifdef GF_DARWIN_HOST_OS
        filler.flags = map_xattr_flags(flags);
#else
        filler.flags = flags;
#endif
        op_ret = dict_foreach (dict, _handle_setxattr_keyvalue_pair,
                               &filler);
        if (op_ret < 0) {
                op_errno = -op_ret;
                op_ret = -1;
        }

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno, NULL);

        return 0;
}


int
posix_xattr_get_real_filename (call_frame_t *frame, xlator_t *this, loc_t *loc,
			       const char *key, dict_t *dict, dict_t *xdata)
{
	char *real_path = NULL;
	struct dirent *dirent = NULL;
	DIR *fd = NULL;
	const char *fname = NULL;
	char *found = NULL;
	int ret = -1;
	int op_ret = -1;

        MAKE_INODE_HANDLE (real_path, this, loc, NULL);

	fd = opendir (real_path);
	if (!fd)
		return -errno;

	fname = key + strlen (GF_XATTR_GET_REAL_FILENAME_KEY);

	while ((dirent = readdir (fd))) {
		if (strcasecmp (dirent->d_name, fname) == 0) {
			found = gf_strdup (dirent->d_name);
			if (!found) {
				closedir (fd);
				return -ENOMEM;
			}
			break;
		}
	}

	closedir (fd);

	if (!found)
		return -ENOENT;

	ret = dict_set_dynstr (dict, (char *)key, found);
	if (ret) {
		GF_FREE (found);
		return -ENOMEM;
	}
	ret = strlen (found) + 1;

	return ret;
}

int
posix_get_ancestry_directory (xlator_t *this, inode_t *leaf_inode,
                              gf_dirent_t *head, char **path, int type,
                              int32_t *op_errno, dict_t *xdata)
{
        ssize_t               handle_size = 0;
        struct posix_private *priv        = NULL;
        char    dirpath[PATH_MAX+1]       = {0,};
        inode_t              *inode       = NULL;
        int                   ret         = -1;

        priv = this->private;

        handle_size = POSIX_GFID_HANDLE_SIZE(priv->base_path_length);

        ret = posix_make_ancestryfromgfid (this, dirpath, PATH_MAX + 1, head,
                                           type | POSIX_ANCESTRY_PATH,
                                           leaf_inode->gfid,
                                           handle_size, priv->base_path,
                                           leaf_inode->table, &inode, xdata);
        if (ret < 0)
                goto out;


        /* there is already a reference in loc->inode */
        inode_unref (inode);

        if ((type & POSIX_ANCESTRY_PATH) && (path != NULL)) {
                if (strcmp (dirpath, "/"))
                        dirpath[strlen (dirpath) - 1] = '\0';

                *path = gf_strdup (dirpath);
        }

out:
        return ret;
}

int32_t
posix_links_in_same_directory (char *dirpath, int count, inode_t *leaf_inode,
                               inode_t *parent, uint64_t ino,
                               gf_dirent_t *head, char **path,
                               int type, dict_t *xdata, int32_t *op_errno)
{
        DIR                  *dirp         = NULL;
        int                   op_ret       = -1;
        struct dirent        *entry        = NULL;
        struct dirent        *result       = NULL;
        inode_t              *linked_inode = NULL;
        gf_dirent_t          *gf_entry     = NULL;
        char    temppath[PATH_MAX+1]       = {0,};
        xlator_t             *this         = NULL;
        struct posix_private *priv         = NULL;
        char                 *tempv        = NULL;

        this = THIS;

        priv = this->private;

        dirp = opendir (dirpath);
        if (!dirp) {
                *op_errno = errno;
                gf_log (this->name, GF_LOG_WARNING,
                        "could not opendir %s: %s", dirpath,
                        strerror (*op_errno));
                goto out;
        }

        entry = alloca (offsetof(struct dirent, d_name) + NAME_MAX + 1);
        if (entry == NULL)
                goto out;

        while (count > 0) {
                *op_errno = readdir_r (dirp, entry, &result);
                if ((result == NULL) || *op_errno)
                        break;

                if (entry->d_ino != ino)
                        continue;

                linked_inode = inode_link (leaf_inode, parent,
                                           entry->d_name, NULL);

                GF_ASSERT (linked_inode == leaf_inode);
                inode_unref (linked_inode);

                if (type & POSIX_ANCESTRY_DENTRY) {
                        loc_t loc = {0, };

                        loc.inode = inode_ref (leaf_inode);
                        uuid_copy (loc.gfid, leaf_inode->gfid);

                        strcpy (temppath, dirpath);
                        strcat (temppath, "/");
                        strcat (temppath, entry->d_name);

                        gf_entry = gf_dirent_for_name (entry->d_name);
                        gf_entry->inode = inode_ref (leaf_inode);
                        gf_entry->dict
                                = posix_lookup_xattr_fill (this,
                                                           temppath,
                                                           &loc, xdata,
                                                           NULL);
                        list_add_tail (&gf_entry->list, &head->list);
                        loc_wipe (&loc);
                }

                if (type & POSIX_ANCESTRY_PATH) {
                        strcpy (temppath,
                                &dirpath[priv->base_path_length]);
                        strcat (temppath, "/");
                        strcat (temppath, entry->d_name);
                        if (!*path) {
                                *path = gf_strdup (temppath);
                        } else {
                                /* creating a colon separated */
                                /* list of hard links */
                                tempv  = GF_REALLOC (*path, strlen (*path)
                                                     + 1  // ':'
                                                     + strlen (temppath) + 1 );
                                if (!tempv) {
                                        gf_log (this->name, GF_LOG_WARNING,
                                                "realloc failed on path");
                                        GF_FREE (*path);
                                        op_ret = -1;
                                        *op_errno = ENOMEM;
                                        goto out;
                                }

                                *path = tempv;
                                strcat (*path, ":");
                                strcat (*path, temppath);
                        }
                }

                count--;
        }

out:
        if (dirp) {
                op_ret = closedir (dirp);
                if (op_ret == -1) {
                        *op_errno = errno;
                        gf_log (this->name, GF_LOG_WARNING,
                                "closedir failed: %s",
                                strerror (*op_errno));
                }
        }

        return op_ret;
}

int
posix_get_ancestry_non_directory (xlator_t *this, inode_t *leaf_inode,
                                  gf_dirent_t *head, char **path, int type,
                                  int32_t *op_errno, dict_t *xdata)
{
        size_t                remaining_size        = 0;
        char    dirpath[PATH_MAX+1]                 = {0,}, *leaf_path = NULL;
        int                   op_ret                = -1, pathlen = -1;
        ssize_t               handle_size           = 0;
        char    pgfidstr[UUID_CANONICAL_FORM_LEN+1] = {0,};
        uuid_t                pgfid                 = {0, };
        int                   nlink_samepgfid       = 0;
        struct stat           stbuf                 = {0,};
        char                 *list                  = NULL;
        int32_t               list_offset           = 0;
        char     key[4096]                          = {0,};
        struct posix_private *priv                  = NULL;
        ssize_t               size                  = 0;
        inode_t              *parent                = NULL;
        loc_t                *loc                   = NULL;

        priv = this->private;

        loc = GF_CALLOC (1, sizeof (*loc), gf_posix_mt_char);
        if (loc == NULL) {
                op_ret = -1;
                *op_errno = ENOMEM;
                goto out;
        }

        uuid_copy (loc->gfid, leaf_inode->gfid);

        MAKE_INODE_HANDLE (leaf_path, this, loc, NULL);

        GF_FREE (loc);

        size = sys_llistxattr (leaf_path, NULL, 0);
        if (size == -1) {
                *op_errno = errno;
                if ((errno == ENOTSUP) || (errno == ENOSYS)) {
                        GF_LOG_OCCASIONALLY (gf_posix_xattr_enotsup_log,
                                             this->name, GF_LOG_WARNING,
                                             "Extended attributes not "
                                             "supported (try remounting brick"
                                             " with 'user_xattr' flag)");

                } else {
                        gf_log (this->name, GF_LOG_WARNING,
                                "listxattr failed on %s: %s",
                                leaf_path, strerror (*op_errno));

                }

                goto out;
        }

        if (size == 0) {
                op_ret = 0;
                goto out;
        }

        list = alloca (size);
        if (!list) {
                *op_errno = errno;
                goto out;
        }

        size = sys_llistxattr (leaf_path, list, size);
        if (size < 0) {
                op_ret = -1;
                *op_errno = errno;
                goto out;
        }
        remaining_size = size;
        list_offset = 0;

        op_ret = sys_lstat (leaf_path, &stbuf);
        if (op_ret == -1) {
                *op_errno = errno;
                gf_log (this->name, GF_LOG_WARNING, "lstat failed"
                        " on %s: %s", leaf_path,
                        strerror (*op_errno));
                goto out;
        }

        while (remaining_size > 0) {
                strcpy (key, list + list_offset);
                if (strncmp (key, PGFID_XATTR_KEY_PREFIX,
                             strlen (PGFID_XATTR_KEY_PREFIX)) != 0)
                        goto next;

                op_ret = sys_lgetxattr (leaf_path, key,
                                        &nlink_samepgfid,
                                        sizeof(nlink_samepgfid));
                if (op_ret == -1) {
                        *op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR,
                                "getxattr failed on "
                                "%s: key = %s (%s)",
                                leaf_path,
                                key,
                                strerror (*op_errno));
                        goto out;
                }

                nlink_samepgfid = ntoh32 (nlink_samepgfid);

                strcpy (pgfidstr, key + strlen(PGFID_XATTR_KEY_PREFIX));
                uuid_parse (pgfidstr, pgfid);

                handle_size = POSIX_GFID_HANDLE_SIZE(priv->base_path_length);

                /* constructing the absolute real path of parent dir */
                strcpy (dirpath, priv->base_path);
                pathlen = PATH_MAX + 1 - priv->base_path_length;

                op_ret = posix_make_ancestryfromgfid (this,
                                                      dirpath + priv->base_path_length,
                                                      pathlen,
                                                      head,
                                                      type | POSIX_ANCESTRY_PATH,
                                                      pgfid,
                                                      handle_size,
                                                      priv->base_path,
                                                      leaf_inode->table,
                                                      &parent, xdata);
                if (op_ret < 0) {
                        goto next;
                }

                dirpath[strlen (dirpath) - 1] = '\0';

                posix_links_in_same_directory (dirpath, nlink_samepgfid,
                                               leaf_inode,
                                               parent, stbuf.st_ino, head,
                                               path, type, xdata, op_errno);

                if (parent != NULL) {
                        inode_unref (parent);
                        parent = NULL;
                }

        next:
                remaining_size -= strlen (key) + 1;
                list_offset += strlen (key) + 1;
        } /* while (remaining_size > 0) */

        op_ret = 0;

out:
        return op_ret;
}

int
posix_get_ancestry (xlator_t *this, inode_t *leaf_inode,
                    gf_dirent_t *head, char **path, int type, int32_t *op_errno,
                    dict_t *xdata)
{
        int                   ret  = -1;
        struct posix_private *priv = NULL;

        priv = this->private;

        if (!priv->update_pgfid_nlinks)
                goto out;

        if (IA_ISDIR (leaf_inode->ia_type)) {
                ret = posix_get_ancestry_directory (this, leaf_inode,
                                                    head, path, type, op_errno,
                                                    xdata);
        } else  {
                ret = posix_get_ancestry_non_directory (this, leaf_inode,
                                                        head, path, type,
                                                        op_errno, xdata);
        }

out:
        return ret;
}

/**
 * posix_getxattr - this function returns a dictionary with all the
 *                  key:value pair present as xattr. used for
 *                  both 'listxattr' and 'getxattr'.
 */
int32_t
posix_getxattr (call_frame_t *frame, xlator_t *this,
                loc_t *loc, const char *name, dict_t *xdata)
{
        struct posix_private *priv                  = NULL;
        int32_t               op_ret                = -1;
        int32_t               op_errno              = 0;
        char     host_buf[1024]                     = {0,};
        char                 *value                 = NULL;
        char                 *real_path             = NULL;
        dict_t               *dict                  = NULL;
        char                 *file_contents         = NULL;
        int                   ret                   = -1;
        char                 *path                  = NULL;
        char                 *rpath                 = NULL;
        char                 *dyn_rpath             = NULL;
        ssize_t               size                  = 0;
        char                 *list                  = NULL;
        int32_t               list_offset           = 0;
        size_t                remaining_size        = 0;
        char                  keybuffer[4096]       = {0,};

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (loc, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);
        MAKE_INODE_HANDLE (real_path, this, loc, NULL);

        op_ret = -1;
        priv = this->private;

        if (loc->inode && IA_ISDIR(loc->inode->ia_type) && name &&
            ZR_FILE_CONTENT_REQUEST(name)) {
                ret = posix_get_file_contents (this, loc->gfid, &name[15],
                                               &file_contents);
                if (ret < 0) {
                        op_errno = -ret;
                        gf_log (this->name, GF_LOG_ERROR,
                                "getting file contents failed: %s",
                                strerror (op_errno));
                        goto out;
                }
        }

        dict = dict_new ();
        if (!dict) {
                op_errno = ENOMEM;
                goto out;
        }

	if (loc->inode && name &&
	    (strncmp (name, GF_XATTR_GET_REAL_FILENAME_KEY,
		      strlen (GF_XATTR_GET_REAL_FILENAME_KEY)) == 0)) {
		ret = posix_xattr_get_real_filename (frame, this, loc,
						     name, dict, xdata);
		if (ret < 0) {
			op_ret = -1;
			op_errno = -ret;
			gf_log (this->name, (op_errno == ENOENT) ?
                                GF_LOG_DEBUG : GF_LOG_WARNING,
				"Failed to get real filename (%s, %s): %s",
				loc->path, name, strerror (op_errno));
			goto out;
		}

		size = ret;
		goto done;
	}

        if (loc->inode && name && !strcmp (name, GLUSTERFS_OPEN_FD_COUNT)) {
                if (!list_empty (&loc->inode->fd_list)) {
                        ret = dict_set_uint32 (dict, (char *)name, 1);
                        if (ret < 0)
                                gf_log (this->name, GF_LOG_WARNING,
                                        "Failed to set dictionary value for %s",
                                        name);
                } else {
                        ret = dict_set_uint32 (dict, (char *)name, 0);
                        if (ret < 0)
                                gf_log (this->name, GF_LOG_WARNING,
                                        "Failed to set dictionary value for %s",
                                        name);
                }
                goto done;
        }
        if (loc->inode && name && (XATTR_IS_PATHINFO (name))) {
                if (LOC_HAS_ABSPATH (loc))
                        MAKE_REAL_PATH (rpath, this, loc->path);
                else
                        rpath = real_path;

                (void) snprintf (host_buf, 1024,
                                 "<POSIX(%s):%s:%s>", priv->base_path,
                                 ((priv->node_uuid_pathinfo
                                   && !uuid_is_null(priv->glusterd_uuid))
                                      ? uuid_utoa (priv->glusterd_uuid)
                                      : priv->hostname),
                                 rpath);

                dyn_rpath = gf_strdup (host_buf);
                if (!dyn_rpath) {
                        ret = -1;
                        goto done;
                }
                size = strlen (dyn_rpath) + 1;
                ret = dict_set_dynstr (dict, (char *)name, dyn_rpath);
                if (ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING,
                                "could not set value (%s) in dictionary",
                                dyn_rpath);
                        GF_FREE (dyn_rpath);
                }

                goto done;
        }

        if (loc->inode && name &&
            (strcmp (name, GF_XATTR_NODE_UUID_KEY) == 0)
            && !uuid_is_null (priv->glusterd_uuid)) {
                (void) snprintf (host_buf, 1024, "%s",
                                 uuid_utoa (priv->glusterd_uuid));

                dyn_rpath = gf_strdup (host_buf);
                if (!dyn_rpath) {
                        ret = -1;
                        goto done;
                }

                size = strlen (dyn_rpath) + 1;
                ret = dict_set_dynstr (dict, GF_XATTR_NODE_UUID_KEY,
                                       dyn_rpath);
                if (ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING,
                                "could not set value (%s) in dictionary",
                                dyn_rpath);
                        GF_FREE (dyn_rpath);
                }
                goto done;
        }

        if (loc->inode && name &&
            (strcmp (name, GFID_TO_PATH_KEY) == 0)) {
                ret = inode_path (loc->inode, NULL, &path);
                if (ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING, "%s: could not get "
                                "inode path", uuid_utoa (loc->inode->gfid));
                        goto done;
                }

                ret = dict_set_dynstr (dict, GFID_TO_PATH_KEY, path);
                if (ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING,
                                "could not set value (%s) in dictionary",
                                host_buf);
                        GF_FREE (path);
                }
                goto done;
        }

        if (loc->inode && name
            && (strcmp (name, GET_ANCESTRY_PATH_KEY) == 0)) {
                int type = POSIX_ANCESTRY_PATH;

                op_ret = posix_get_ancestry (this, loc->inode, NULL,
                                             &path, type, &op_errno,
                                             xdata);
                if (op_ret < 0) {
                        op_ret = -1;
                        op_errno = ENODATA;
                        goto out;
                }

                op_ret = dict_set_dynstr (dict, GET_ANCESTRY_PATH_KEY, path);
                if (op_ret < 0) {
                        gf_log (this->name, GF_LOG_WARNING, "could not get "
                                "value for key (%s)", GET_ANCESTRY_PATH_KEY);
                        GF_FREE (path);
                        op_errno = -op_ret;
                        op_ret = -1;
                }

                goto done;
        }

        if (name) {
                strcpy (keybuffer, name);
                char *key = keybuffer;
#if defined(GF_DARWIN_HOST_OS_DISABLED)
                if (priv->xattr_user_namespace == XATTR_STRIP) {
                        if (strncmp(key, "user.",5) == 0) {
                                key += 5;
                                gf_log (this->name,
                                        GF_LOG_DEBUG,
                                        "getxattr for file %s"
                                        " stripping user key: %s -> %s",
                                        real_path, keybuffer, key);
                        }
                }
#endif
                size = sys_lgetxattr (real_path, key, NULL, 0);
                if (size == -1) {
                        op_errno = errno;
                        if ((op_errno == ENOTSUP) || (op_errno == ENOSYS)) {
                                GF_LOG_OCCASIONALLY (gf_posix_xattr_enotsup_log,
                                                     this->name, GF_LOG_WARNING,
                                                     "Extended attributes not "
                                                     "supported (try remounting"
                                                     " brick with 'user_xattr' "
                                                     "flag)");
                        } else if (op_errno == ENOATTR ||
                                        op_errno == ENODATA) {
                                gf_log (this->name, GF_LOG_DEBUG,
                                        "No such attribute:%s for file %s",
                                        key, real_path);
                        } else {
                                gf_log (this->name, GF_LOG_ERROR,
                                        "getxattr failed on %s: %s (%s)",
                                        real_path, key, strerror (op_errno));
                        }

                        goto done;
                }
                value = GF_CALLOC (size + 1, sizeof(char), gf_posix_mt_char);
                if (!value) {
                        op_ret = -1;
                        op_errno = ENOMEM;
                        goto out;
                }
                size = sys_lgetxattr (real_path, key, value, size);
                if (size == -1) {
                        op_ret = -1;
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR, "getxattr failed on "
                                "%s: key = %s (%s)", real_path, key,
                                strerror (op_errno));
                        GF_FREE (value);
                        goto out;
                }
                value [size] = '\0';
                op_ret = dict_set_dynptr (dict, key, value, size);
                if (op_ret < 0) {
                        op_errno = -op_ret;
                        gf_log (this->name, GF_LOG_ERROR, "dict set operation "
                                "on %s for the key %s failed.", real_path, key);
                        GF_FREE (value);
                        goto out;
                }

                goto done;
        }

        size = sys_llistxattr (real_path, NULL, 0);
        if (size == -1) {
                op_errno = errno;
                if ((errno == ENOTSUP) || (errno == ENOSYS)) {
                        GF_LOG_OCCASIONALLY (gf_posix_xattr_enotsup_log,
                                             this->name, GF_LOG_WARNING,
                                             "Extended attributes not "
                                             "supported (try remounting"
                                             " brick with 'user_xattr' "
                                             "flag)");
                }
                else {
                        gf_log (this->name, GF_LOG_ERROR,
                                "listxattr failed on %s: %s",
                                real_path, strerror (op_errno));
                }
                goto out;
        }

        if (size == 0)
                goto done;

        list = alloca (size);
        if (!list) {
                op_errno = errno;
                goto out;
        }

        size = sys_llistxattr (real_path, list, size);
        if (size < 0) {
                op_ret = -1;
                op_errno = errno;
                goto out;
        }

        remaining_size = size;
        list_offset = 0;
        while (remaining_size > 0) {
                strcpy (keybuffer, list + list_offset);
                size = sys_lgetxattr (real_path, keybuffer, NULL, 0);
                if (size == -1) {
                        op_ret = -1;
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR, "getxattr failed on "
                                "%s: key = %s (%s)", real_path, keybuffer,
                                strerror (op_errno));
                        break;
                }

                value = GF_CALLOC (size + 1, sizeof(char),
                                   gf_posix_mt_char);
                if (!value) {
                        op_errno = errno;
                        goto out;
                }

                size = sys_lgetxattr (real_path, keybuffer, value, size);
                if (size == -1) {
                        op_ret = -1;
                        op_errno = errno;
                        gf_log (this->name, GF_LOG_ERROR, "getxattr failed on "
                                "%s: key = %s (%s)", real_path, keybuffer,
                                strerror (op_errno));
                        GF_FREE (value);
                        break;
                }

                value [size] = '\0';
#ifdef GF_DARWIN_HOST_OS
                /* The protocol expect namespace for now */
                char *newkey = NULL;
                gf_add_prefix (XATTR_USER_PREFIX, keybuffer, &newkey);
                strcpy (keybuffer, newkey);
                GF_FREE (newkey);
#endif
                op_ret = dict_set_dynptr (dict, keybuffer, value, size);
                if (op_ret < 0) {
                        op_errno = -op_ret;
                        gf_log (this->name, GF_LOG_ERROR, "dict set operation "
                                "on %s for the key %s failed.", real_path,
                                keybuffer);
                        GF_FREE (value);
                        goto out;
                }

                remaining_size -= strlen (keybuffer) + 1;
                list_offset += strlen (keybuffer) + 1;

        } /* while (remaining_size > 0) */

done:
        op_ret = size;

        if (dict) {
                dict_del (dict, GFID_XATTR_KEY);
                dict_del (dict, GF_XATTR_VOL_ID_KEY);
        }

out:
        SET_TO_OLD_FS_ID ();

        STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict, NULL);

        if (dict) {
                dict_unref (dict);
        }

        return 0;
}


int32_t
posix_fgetxattr (call_frame_t *frame, xlator_t *this,
                 fd_t *fd, const char *name, dict_t *xdata)
{
        int32_t           op_ret         = -1;
        int32_t           op_errno       = ENOENT;
        struct posix_fd * pfd            = NULL;
        int               _fd            = -1;
        int32_t           list_offset    = 0;
        ssize_t           size           = 0;
        size_t            remaining_size = 0;
        char              key[4096]      = {0,};
        char *            value          = NULL;
        char *            list           = NULL;
        dict_t *          dict           = NULL;
        int               ret            = -1;

        DECLARE_OLD_FS_ID_VAR;

        VALIDATE_OR_GOTO (frame, out);
        VALIDATE_OR_GOTO (this, out);
        VALIDATE_OR_GOTO (fd, out);

        SET_FS_ID (frame->root->uid, frame->root->gid);

        ret = posix_fd_ctx_get (fd, this, &pfd);
        if (ret < 0) {
                op_errno = -ret;
                gf_log (this->name, GF_LOG_WARNING,
                        "pfd is NULL from fd=%p", fd);
                goto out;
        }

        _fd = pfd->fd;

        /* Get the total size */
        dict = get_new_dict ();
        if (!dict) {
                goto out;
        }

        if (name && !strcmp (name, GLUSTERFS_OPEN_FD_COUNT)) {
                ret = dict_set_uint32 (dict, (ch