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Message-ID:
<SJ0PR11MB5896A59A22726A451960ABB6C3432@SJ0PR11MB5896.namprd11.prod.outlook.com>
Date: Mon, 21 Oct 2024 23:44:49 +0000
From: "Karan Tilak Kumar (kartilak)" <kartilak@...co.com>
To: Hannes Reinecke <hare@...e.de>, "Sesidhar Baddela (sebaddel)"
<sebaddel@...co.com>
CC: "Arulprabhu Ponnusamy (arulponn)" <arulponn@...co.com>, "Dhanraj Jhawar
(djhawar)" <djhawar@...co.com>, "Gian Carlo Boffa (gcboffa)"
<gcboffa@...co.com>, "Masa Kai (mkai2)" <mkai2@...co.com>, "Satish Kharat
(satishkh)" <satishkh@...co.com>, "Arun Easi (aeasi)" <aeasi@...co.com>,
"jejb@...ux.ibm.com" <jejb@...ux.ibm.com>, "martin.petersen@...cle.com"
<martin.petersen@...cle.com>, "linux-scsi@...r.kernel.org"
<linux-scsi@...r.kernel.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v5 02/14] scsi: fnic: Add headers and definitions for FDLS
On Sunday, October 20, 2024 11:34 PM, Hannes Reinecke <hare@...e.de> wrote:
>
> On 10/18/24 18:13, Karan Tilak Kumar wrote:
> > Add headers and definitions for FDLS (Fabric Discovery and Login
> > Services).
> >
> > Reviewed-by: Sesidhar Baddela <sebaddel@...co.com>
> > Co-developed-by: Gian Carlo Boffa <gcboffa@...co.com>
> > Signed-off-by: Gian Carlo Boffa <gcboffa@...co.com>
> > Co-developed-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> > Signed-off-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> > Co-developed-by: Arun Easi <aeasi@...co.com>
> > Signed-off-by: Arun Easi <aeasi@...co.com>
> > Co-developed-by: Karan Tilak Kumar <kartilak@...co.com>
> > Signed-off-by: Karan Tilak Kumar <kartilak@...co.com>
> > ---
> > Changes between v4 and v5:
> > Incorporate review comments from Martin:
> > Remove newline at the end of fnic_fdls.h.
> > Modify attribution appropriately.
> >
> > Changes between v2 and v3:
> > Incorporate review comments from Hannes:
> > Replace redundant structure definitions with standard
> > definitions.
> > Remove multiple endian macro copies.
> > Remove static OXIDs macro definitions.
> >
> > Changes between v1 and v2:
> > Incorporate review comments from Hannes:
> > Remove redundant patch description.
> > Replace htonll() with get_unaligned_be64().
> > Replace raw values with macro names.
> > Remove fnic_del_fabric_timer_sync macro.
> > Remove fnic_del_tport_timer_sync macro.
> > Add fnic_del_fabric_timer_sync function declaration.
> > Add fnic_del_tport_timer_sync function declaration.
> > Replace definitions with standard definitions from fc_els.h.
> > Move FDMI function declaration to this patch.
> > Incorporate review comments from John:
> > Replace int return value with void.
> > ---
> > drivers/scsi/fnic/fdls_fc.h | 381 ++++++++++++++++++++++++++++++
> > drivers/scsi/fnic/fnic_fdls.h | 430 ++++++++++++++++++++++++++++++++++
> > 2 files changed, 811 insertions(+)
> > create mode 100644 drivers/scsi/fnic/fdls_fc.h
> > create mode 100644 drivers/scsi/fnic/fnic_fdls.h
> >
> > diff --git a/drivers/scsi/fnic/fdls_fc.h b/drivers/scsi/fnic/fdls_fc.h
> > new file mode 100644
> > index 000000000000..25dc89a4fc2f
> > --- /dev/null
> > +++ b/drivers/scsi/fnic/fdls_fc.h
> > @@ -0,0 +1,381 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright 2008 Cisco Systems, Inc. All rights reserved.
> > + * Copyright 2007 Nuova Systems, Inc. All rights reserved.
> > + */
> > +
> > +#ifndef _FDLS_FC_H_
> > +#define _FDLS_FC_H_
> > +
> > +/* This file contains the declarations for FC fabric services
> > + * and target discovery
> > + *
> > + * Request and Response for
> > + * 1. FLOGI
> > + * 2. PLOGI to Fabric Controller
> > + * 3. GPN_ID, GPN_FT
> > + * 4. RSCN
> > + * 5. PLOGI to Target
> > + * 6. PRLI to Target
> > + */
> > +
> > +#include <scsi/scsi.h>
> > +#include <scsi/fc/fc_els.h>
> > +#include <uapi/scsi/fc/fc_fs.h>
> > +#include <uapi/scsi/fc/fc_ns.h>
> > +#include <uapi/scsi/fc/fc_gs.h>
> > +#include <scsi/fc/fc_ms.h>
> > +
> > +#ifndef MIN
> > +#define MIN(x, y) (x < y ? x : y)
> > +#endif /* MIN */
> > +
>
> #include <linux/minmax.h>
Thanks for your comment, Hannes.
I'll fix this in the next version.
> > +#define FNIC_FCP_SP_RD_XRDY_DIS 0x00000002
> > +#define FNIC_FCP_SP_TARGET 0x00000010
> > +#define FNIC_FCP_SP_INITIATOR 0x00000020
> > +#define FNIC_FCP_SP_CONF_CMPL 0x00000080
> > +#define FNIC_FCP_SP_RETRY 0x00000100
> > +
> > +#define FNIC_E_D_TOV (0x7d0)
>
> Please keep E_D_TOV in decimal for better readability.
> And anyway you can use FC_DEF_E_T_TOV (which is already
> defined and has the same value)
Sure Hannes. I'll fix this in the next version.
> > +#define FNIC_FC_CONCUR_SEQS (0xFF)
> > +#define FNIC_FC_RO_INFO (0x1F)
> > +
> > +/* Little Endian */
> > +#define FNIC_UNSUPPORTED_RESP_OXID (0xffff)
> > +#define FNIC_UNASSIGNED_RXID (0xffff)
> > +#define FNIC_ELS_REQ_FCTL (0x000029)
> > +#define FNIC_ELS_REP_FCTL (0x000099)
> > +
> > +#define FNIC_FCP_RSP_FCTL (0x000099)
> > +#define FNIC_REQ_ABTS_FCTL (0x000009)
> > +
> > +#define FNIC_FC_PH_VER_HI (0x20)
> > +#define FNIC_FC_PH_VER_LO (0x20)
> > +#define FNIC_FC_PH_VER (0x2020)
> > +#define FNIC_FC_B2B_CREDIT (0x0A)
> > +#define FNIC_FC_B2B_RDF_SZ (0x0800)
> > +
> > +#define FNIC_FC_FEATURES (0x0080)
> > +
> > +#define ETH_TYPE_FCOE 0x8906
> > +#define ETH_TYPE_FIP 0x8914
> > +
>
> #include <linux/if_ether.h>
> ETH_P_FIP
> ETH_P_FCOE
Sure Hannes. I'll fix this in the next version.
> > +#define FC_DIR_SERVER 0xFFFFFC
> > +#define FC_FABRIC_CONTROLLER 0xFFFFFD
> > +#define FC_DOMAIN_CONTR 0xFFFFFE
> > +
>
> Please use values from 'enum fc_well_known_fid'
Sure Hannes. I'll fix this in the next version.
> > +#define FNIC_FC_GPN_LAST_ENTRY (0x80)
> > +
> > +#define FNIC_BA_ACC_RCTL 0x84
> > +#define FNIC_BA_RJT_RCTL 0x85
> > +#define FC_ABTS_RCTL 0x81
> > +
>
> #include <scsi/fc/fc_fs.h>
Sure Hannes. I'll fix this in the next version.
> > +/* FNIC FDMI Register HBA Macros */
> > +#define FNIC_FDMI_NUM_PORTS 0x1000000
> > +#define FNIC_FDMI_NUM_HBA_ATTRS 0x9000000
> > +#define FNIC_FDMI_TYPE_NODE_NAME 0X100
> > +#define FNIC_FDMI_TYPE_MANUFACTURER 0X200
> > +#define FNIC_FDMI_MANUFACTURER "Cisco Systems"
> > +#define FNIC_FDMI_TYPE_SERIAL_NUMBER 0X300
> > +#define FNIC_FDMI_TYPE_MODEL 0X400
> > +#define FNIC_FDMI_TYPE_MODEL_DES 0X500
> > +#define FNIC_FDMI_MODEL_DESCRIPTION "Cisco Virtual Interface Card"
> > +#define FNIC_FDMI_TYPE_HARDWARE_VERSION 0X600
> > +#define FNIC_FDMI_TYPE_DRIVER_VERSION 0X700
> > +#define FNIC_FDMI_TYPE_ROM_VERSION 0X800
> > +#define FNIC_FDMI_TYPE_FIRMWARE_VERSION 0X900
> > +#define FNIC_FDMI_NN_LEN 0xc00
> > +#define FNIC_FDMI_MANU_LEN 0x1800
> > +#define FNIC_FDMI_SERIAL_LEN 0x1400
> > +#define FNIC_FDMI_MODEL_LEN 0x1000
> > +#define FNIC_FDMI_MODEL_DES_LEN 0x3c00
> > +#define FNIC_FDMI_HW_VER_LEN 0x1400
> > +#define FNIC_FDMI_DR_VER_LEN 0x2000
> > +#define FNIC_FDMI_ROM_VER_LEN 0xc00
> > +#define FNIC_FDMI_FW_VER_LEN 0x1400
> > +
> > +/* FNIC FDMI Register PA Macros */
> > +#define FNIC_FDMI_TYPE_FC4_TYPES 0X100
> > +#define FNIC_FDMI_TYPE_SUPPORTED_SPEEDS 0X200
> > +#define FNIC_FDMI_TYPE_CURRENT_SPEED 0X300
> > +#define FNIC_FDMI_TYPE_MAX_FRAME_SIZE 0X400
> > +#define FNIC_FDMI_TYPE_OS_NAME 0X500
> > +#define FNIC_FDMI_TYPE_HOST_NAME 0X600
> > +#define FNIC_FDMI_NUM_PORT_ATTRS 0x6000000
> > +#define FNIC_FDMI_FC4_LEN 0x2400
> > +#define FNIC_FDMI_SUPP_SPEED_LEN 0x800
> > +#define FNIC_FDMI_CUR_SPEED_LEN 0x800
> > +#define FNIC_FDMI_MFS_LEN 0x800
> > +#define FNIC_FDMI_MFS 0x0080000
> > +#define FNIC_FDMI_OS_NAME_LEN 0x1400
> > +#define FNIC_FDMI_HN_LEN 0x1C00
> > +
> Do these need to be defined here?
> Wouldn't it be better to move them into the source file handling FDMI?
> I doubt that they need to be available for every file ...
Thanks Hannes. Yes, they can be moved. I'll fix it in the next version.
> > +#define FNIC_LOGI_RDF_SIZE(_logi) ((_logi)->fl_csp.sp_bb_data)
> > +#define FNIC_LOGI_R_A_TOV(_logi) ((_logi)->fl_csp.sp_r_a_tov)
> > +#define FNIC_LOGI_E_D_TOV(_logi) ((_logi)->fl_csp.sp_e_d_tov)
> > +#define FNIC_LOGI_FEATURES(_logi) ((_logi)->fl_csp.sp_features)
> > +#define FNIC_LOGI_PORT_NAME(_logi) ((_logi)->fl_wwpn)
> > +#define FNIC_LOGI_NODE_NAME(_logi) ((_logi)->fl_wwnn)
> > +
> > +#define FNIC_LOGI_SET_NPORT_NAME(_logi, _pName) \
> > + (FNIC_LOGI_PORT_NAME(_logi) = get_unaligned_be64(&_pName))
> > +#define FNIC_LOGI_SET_NODE_NAME(_logi, _pName) \
> > + (FNIC_LOGI_NODE_NAME(_logi) = get_unaligned_be64(&_pName))
> > +#define FNIC_LOGI_SET_RDF_SIZE(_logi, _rdf_size) \
> > + (FNIC_LOGI_RDF_SIZE(_logi) = cpu_to_be16(_rdf_size))
> > +#define FNIC_LOGI_SET_E_D_TOV(_logi, _e_d_tov) \
> > + (FNIC_LOGI_E_D_TOV(_logi) = htonl(_e_d_tov))
> > +#define FNIC_LOGI_SET_R_A_TOV(_logi, _r_a_tov) \
> > + (FNIC_LOGI_R_A_TOV(_logi) = htonl(_r_a_tov))
> > +
> > +#define FNIC_STD_SET_S_ID(_fchdr, _sid) memcpy((_fchdr)->fh_s_id, _sid, 3)
> > +#define FNIC_STD_SET_D_ID(_fchdr, _did) memcpy((_fchdr)->fh_d_id, _did, 3)
> > +#define FNIC_STD_SET_OX_ID(_fchdr, _oxid) ((_fchdr)->fh_ox_id = _oxid)
> > +#define FNIC_STD_SET_RX_ID(_fchdr, _rxid) ((_fchdr)->fh_rx_id = _rxid)
> > +
> > +#define FNIC_STD_SET_R_CTL(_fchdr, _rctl) ((_fchdr)->fh_r_ctl = _rctl)
> > +#define FNIC_STD_SET_TYPE(_fchdr, _type) ((_fchdr)->fh_type = _type)
> > +#define FNIC_STD_SET_F_CTL(_fchdr, _fctl) \
> > + put_unaligned_be24(_fctl, (_fchdr)->fh_f_ctl)
> > +
> > +#define FNIC_STD_SET_NPORT_NAME(_ptr, _wwpn) put_unaligned_be64(_wwpn, _ptr)
> > +#define FNIC_STD_SET_NODE_NAME(_ptr, _wwnn) put_unaligned_be64(_wwnn, _ptr)
> > +#define FNIC_STD_SET_PORT_ID(__req, __portid) \
> > + memcpy(__req->fr_fid.fp_fid, __portid, 3)
> > +#define FNIC_STD_SET_PORT_NAME(_req, _pName) \
> > + (put_unaligned_be64(_pName, &_req->fr_wwn))
> > +
> > +#define FNIC_STD_GET_OX_ID(_fchdr) ((_fchdr)->fh_ox_id)
> > +#define FNIC_STD_GET_RX_ID(_fchdr) ((_fchdr)->fh_rx_id)
> > +#define FNIC_STD_GET_S_ID(_fchdr) ((_fchdr)->fh_s_id)
> > +#define FNIC_STD_GET_D_ID(_fchdr) ((_fchdr)->fh_d_id)
> > +#define FNIC_STD_GET_TYPE(_fchdr) ((_fchdr)->fh_type)
> > +#define FNIC_STD_GET_F_CTL(_fchdr) ((_fchdr)->fh_f_ctl)
> > +#define FNIC_STD_GET_R_CTL(_fchdr) ((_fchdr)->fh_r_ctl)
> > +
> > +#define FNIC_STD_GET_FC_CT_CMD(__fcct_hdr) (be16_to_cpu(__fcct_hdr->ct_cmd))
> > +
> > +#define FNIC_FCOE_SOF (0x2E)
> > +#define FNIC_FCOE_EOF (0x42)
> > +
> > +#define FNIC_FCOE_MAX_FRAME_SZ (2048)
> > +#define FNIC_FCOE_MIN_FRAME_SZ (280)
> > +#define FNIC_FC_MAX_PAYLOAD_LEN (2048)
> > +#define FNIC_MIN_DATA_FIELD_SIZE (256)
> > +#define FNIC_R_A_TOV_DEF (10 * 1000) /* msec */
> > +#define FNIC_E_D_TOV_DEF (2 * 1000) /* msec */
> > +
>
> ?? You already had defined FNIC_E_D_TOV above ...
Thanks for the observation, Hannes. Yes, this is redundant.
I'll remove it in the next version.
> > +#define FNIC_FC_EDTOV_NSEC (0x400)
> > +#define FNIC_NSEC_TO_MSEC (0x1000000)
> > +#define FCP_PRLI_FUNC_TARGET (0x0010)
> > +
> > +#define FNIC_FC_R_CTL_SOLICITED_DATA (0x21)
> > +#define FNIC_FC_F_CTL_LAST_END_SEQ (0x98)
> > +#define FNIC_FC_F_CTL_LAST_END_SEQ_INT (0x99)
> > +#define FNIC_FC_F_CTL_FIRST_LAST_SEQINIT (0x29)
> > +#define FNIC_FC_R_CTL_FC4_SCTL (0x03)
> > +#define FNIC_FC_CS_CTL (0x00)
> > +
> > +#define FNIC_FC_FRAME_UNSOLICITED(_fchdr) \
> > + (_fchdr->fh_r_ctl == FC_RCTL_ELS_REQ)
> > +#define FNIC_FC_FRAME_SOLICITED_DATA(_fchdr) \
> > + (_fchdr->fh_r_ctl == FNIC_FC_R_CTL_SOLICITED_DATA)
> > +#define FNIC_FC_FRAME_SOLICITED_CTRL_REPLY(_fchdr) \
> > + (_fchdr->fh_r_ctl == FC_RCTL_ELS_REP)
> > +#define FNIC_FC_FRAME_FCTL_LAST_END_SEQ(_fchdr) \
> > + (_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_LAST_END_SEQ)
> > +#define FNIC_FC_FRAME_FCTL_LAST_END_SEQ_INT(_fchdr) \
> > + (_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_LAST_END_SEQ_INT)
> > +#define FNIC_FC_FRAME_FCTL_FIRST_LAST_SEQINIT(_fchdr) \
> > + (_fchdr->fh_f_ctl[0] == FNIC_FC_F_CTL_FIRST_LAST_SEQINIT)
> > +#define FNIC_FC_FRAME_FC4_SCTL(_fchdr) \
> > + (_fchdr->fh_r_ctl == FNIC_FC_R_CTL_FC4_SCTL)
> > +#define FNIC_FC_FRAME_TYPE_BLS(_fchdr) (_fchdr->fh_type == FC_TYPE_BLS)
> > +#define FNIC_FC_FRAME_TYPE_ELS(_fchdr) (_fchdr->fh_type == FC_TYPE_ELS)
> > +#define FNIC_FC_FRAME_TYPE_FC_GS(_fchdr) (_fchdr->fh_type == FC_TYPE_CT)
> > +#define FNIC_FC_FRAME_CS_CTL(_fchdr) (_fchdr->fh_cs_ctl == FNIC_FC_CS_CTL)
> > +
> > +#define FNIC_FC_C3_RDF (0xfff)
> > +#define FNIC_FC_PLOGI_RSP_RDF(_plogi_rsp) \
> > + (MIN(_plogi_rsp->u.csp_plogi.b2b_rdf_size, \
> > + (_plogi_rsp->spc3[4] & FNIC_FC_C3_RDF)))
> > +#define FNIC_FC_PLOGI_RSP_CONCUR_SEQ(_plogi_rsp) \
> > + (MIN(_plogi_rsp->els.fl_csp.sp_tot_seq, \
> > + (be16_to_cpu(_plogi_rsp->els.fl_cssp[2].cp_con_seq) & 0xff)))
> > +
> > +/* Frame header */
> > +struct fnic_eth_hdr_s {
> > + uint8_t dst_mac[6];
> > + uint8_t src_mac[6];
> > + uint16_t ether_type;
> > +} __packed;
> > +
> > +struct fnic_fcoe_hdr_s {
> > + uint8_t ver;
> > + uint8_t rsvd[12];
> > + uint8_t sof;
> > +} __packed;
> > +
> > +/* FLOGI/PLOGI struct */
> > +struct fc_std_flogi {
> > + struct fc_frame_header fchdr;
> > + struct fc_els_flogi els;
> > +} __packed;
> > +
> > +#define FC_ELS_RSP_ACC_SIZE (sizeof(struct fc_frame_header) + \
> > + sizeof(struct fc_els_ls_acc))
> > +#define FC_ELS_RSP_REJ_SIZE (sizeof(struct fc_frame_header) + \
> > + sizeof(struct fc_els_ls_rjt))
> > +
> > +struct fc_std_els_rsp {
> > + struct fc_frame_header fchdr;
> > + union {
> > + u8 rsp_cmd;
> > + struct fc_els_ls_acc acc;
> > + struct fc_els_ls_rjt rej;
> > + } u;
> > +} __packed;
> > +
> > +struct fc_std_els_adisc {
> > + struct fc_frame_header fchdr;
> > + struct fc_els_adisc els;
> > +} __packed;
> > +
> > +struct fc_std_rls_acc {
> > + struct fc_frame_header fchdr;
> > + struct fc_els_rls_resp els;
> > +} __packed;
> > +
> > +struct fc_std_abts_ba_acc {
> > + struct fc_frame_header fchdr;
> > + struct fc_ba_acc acc;
> > +} __packed;
> > +
> > +struct fc_std_abts_ba_rjt {
> > + struct fc_frame_header fchdr;
> > + struct fc_ba_rjt rjt;
> > +} __packed;
> > +
> > +struct fc_std_els_prli {
> > + struct fc_frame_header fchdr;
> > + struct fc_els_prli els_prli;
> > + struct fc_els_spp sp;
> > +} __packed;
> > +
> > +struct fc_std_rpn_id {
> > + struct fc_frame_header fchdr;
> > + struct fc_ct_hdr fc_std_ct_hdr;
> > + struct fc_ns_rn_id rpn_id;
> > +} __packed;
> > +
> > +struct fc_std_fdmi_rhba {
> > + struct fc_frame_header fchdr;
> > + struct fc_ct_hdr fc_std_ct_hdr;
> > + uint64_t hba_identifier;
> > + uint32_t num_ports;
> > + uint64_t port_name;
> > + uint32_t num_hba_attributes;
> > + uint16_t type_nn;
> > + uint16_t length_nn;
> > + uint64_t node_name;
> > + uint16_t type_manu;
> > + uint16_t length_manu;
> > + uint8_t manufacturer[20];
> > + uint16_t type_serial;
> > + uint16_t length_serial;
> > + uint8_t serial_num[16];
> > + uint16_t type_model;
> > + uint16_t length_model;
> > + uint8_t model[12];
> > + uint16_t type_model_des;
> > + uint16_t length_model_des;
> > + uint8_t model_description[56];
> > + uint16_t type_hw_ver;
> > + uint16_t length_hw_ver;
> > + uint8_t hardware_ver[16];
> > + uint16_t type_dr_ver;
> > + uint16_t length_dr_ver;
> > + uint8_t driver_ver[28];
> > + uint16_t type_rom_ver;
> > + uint16_t length_rom_ver;
> > + uint8_t rom_ver[8];
> > + uint16_t type_fw_ver;
> > + uint16_t length_fw_ver;
> > + uint8_t firmware_ver[16];
> > +} __packed;
> > +
> > +struct fc_std_fdmi_rpa {
> > + struct fc_frame_header fchdr;
> > + struct fc_ct_hdr fc_std_ct_hdr;
> > + uint64_t port_name;
> > + uint32_t num_port_attributes;
> > + uint16_t type_fc4;
> > + uint16_t length_fc4;
> > + uint8_t fc4_type[32];
> > + uint16_t type_supp_speed;
> > + uint16_t length_supp_speed;
> > + uint32_t supported_speed;
> > + uint16_t type_cur_speed;
> > + uint16_t length_cur_speed;
> > + uint32_t current_speed;
> > + uint16_t type_max_frame_size;
> > + uint16_t length_max_frame_size;
> > + uint32_t max_frame_size;
> > + uint16_t type_os_name;
> > + uint16_t length_os_name;
> > + uint8_t os_name[16];
> > + uint16_t type_host_name;
> > + uint16_t length_host_name;
> > + uint8_t host_name[24];
> > +} __packed;
> > +
>
> Weelll ....
> There _is_ an FDMI structure definition in
> include/scsi/fc/fc_ms.h.
>
> Remainder looks ok.
Thanks Hannes. We are reviewing this internally.
> Cheers,
>
> Hannes
> --
> Dr. Hannes Reinecke Kernel Storage Architect
> hare@...e.de +49 911 74053 688
> SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
> HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
>
Thanks for your time and effort in reviewing this Hannes.
Appreciate it.
Regards,
Karan
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