1*a90cf9f2SGordon Ross /* 2*a90cf9f2SGordon Ross * This file and its contents are supplied under the terms of the 3*a90cf9f2SGordon Ross * Common Development and Distribution License ("CDDL"), version 1.0. 4*a90cf9f2SGordon Ross * You may only use this file in accordance with the terms of version 5*a90cf9f2SGordon Ross * 1.0 of the CDDL. 6*a90cf9f2SGordon Ross * 7*a90cf9f2SGordon Ross * A full copy of the text of the CDDL should have accompanied this 8*a90cf9f2SGordon Ross * source. A copy of the CDDL is also available via the Internet at 9*a90cf9f2SGordon Ross * http://www.illumos.org/license/CDDL. 10*a90cf9f2SGordon Ross */ 11*a90cf9f2SGordon Ross 12*a90cf9f2SGordon Ross /* 13*a90cf9f2SGordon Ross * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 14*a90cf9f2SGordon Ross */ 15*a90cf9f2SGordon Ross 16*a90cf9f2SGordon Ross /* 17*a90cf9f2SGordon Ross * Dispatch function for SMB2_READ 18*a90cf9f2SGordon Ross */ 19*a90cf9f2SGordon Ross 20*a90cf9f2SGordon Ross #include <smbsrv/smb2_kproto.h> 21*a90cf9f2SGordon Ross #include <smbsrv/smb_fsops.h> 22*a90cf9f2SGordon Ross 23*a90cf9f2SGordon Ross smb_sdrc_t 24*a90cf9f2SGordon Ross smb2_read(smb_request_t *sr) 25*a90cf9f2SGordon Ross { 26*a90cf9f2SGordon Ross smb_ofile_t *of = NULL; 27*a90cf9f2SGordon Ross smb_vdb_t *vdb = NULL; 28*a90cf9f2SGordon Ross struct mbuf *m = NULL; 29*a90cf9f2SGordon Ross uint16_t StructSize; 30*a90cf9f2SGordon Ross uint8_t Padding; 31*a90cf9f2SGordon Ross uint8_t DataOff; 32*a90cf9f2SGordon Ross uint32_t Length; 33*a90cf9f2SGordon Ross uint64_t Offset; 34*a90cf9f2SGordon Ross smb2fid_t smb2fid; 35*a90cf9f2SGordon Ross uint32_t MinCount; 36*a90cf9f2SGordon Ross uint32_t Channel; 37*a90cf9f2SGordon Ross uint32_t Remaining; 38*a90cf9f2SGordon Ross uint16_t ChanInfoOffset; 39*a90cf9f2SGordon Ross uint16_t ChanInfoLength; 40*a90cf9f2SGordon Ross uint32_t XferCount; 41*a90cf9f2SGordon Ross uint32_t status; 42*a90cf9f2SGordon Ross int rc = 0; 43*a90cf9f2SGordon Ross 44*a90cf9f2SGordon Ross /* 45*a90cf9f2SGordon Ross * SMB2 Read request 46*a90cf9f2SGordon Ross */ 47*a90cf9f2SGordon Ross rc = smb_mbc_decodef( 48*a90cf9f2SGordon Ross &sr->smb_data, 49*a90cf9f2SGordon Ross "wb.lqqqlllww", 50*a90cf9f2SGordon Ross &StructSize, /* w */ 51*a90cf9f2SGordon Ross &Padding, /* b. */ 52*a90cf9f2SGordon Ross &Length, /* l */ 53*a90cf9f2SGordon Ross &Offset, /* q */ 54*a90cf9f2SGordon Ross &smb2fid.persistent, /* q */ 55*a90cf9f2SGordon Ross &smb2fid.temporal, /* q */ 56*a90cf9f2SGordon Ross &MinCount, /* l */ 57*a90cf9f2SGordon Ross &Channel, /* l */ 58*a90cf9f2SGordon Ross &Remaining, /* l */ 59*a90cf9f2SGordon Ross &ChanInfoOffset, /* w */ 60*a90cf9f2SGordon Ross &ChanInfoLength); /* w */ 61*a90cf9f2SGordon Ross if (rc) 62*a90cf9f2SGordon Ross return (SDRC_ERROR); 63*a90cf9f2SGordon Ross if (StructSize != 49) 64*a90cf9f2SGordon Ross return (SDRC_ERROR); 65*a90cf9f2SGordon Ross 66*a90cf9f2SGordon Ross status = smb2sr_lookup_fid(sr, &smb2fid); 67*a90cf9f2SGordon Ross if (status) { 68*a90cf9f2SGordon Ross smb2sr_put_error(sr, status); 69*a90cf9f2SGordon Ross return (SDRC_SUCCESS); 70*a90cf9f2SGordon Ross } 71*a90cf9f2SGordon Ross of = sr->fid_ofile; 72*a90cf9f2SGordon Ross 73*a90cf9f2SGordon Ross if (Length > smb2_max_rwsize) { 74*a90cf9f2SGordon Ross smb2sr_put_error(sr, NT_STATUS_INVALID_PARAMETER); 75*a90cf9f2SGordon Ross return (SDRC_SUCCESS); 76*a90cf9f2SGordon Ross } 77*a90cf9f2SGordon Ross if (MinCount > Length) 78*a90cf9f2SGordon Ross MinCount = Length; 79*a90cf9f2SGordon Ross 80*a90cf9f2SGordon Ross /* This is automatically free'd. */ 81*a90cf9f2SGordon Ross vdb = smb_srm_zalloc(sr, sizeof (*vdb)); 82*a90cf9f2SGordon Ross vdb->vdb_tag = 0; 83*a90cf9f2SGordon Ross vdb->vdb_uio.uio_iov = &vdb->vdb_iovec[0]; 84*a90cf9f2SGordon Ross vdb->vdb_uio.uio_iovcnt = MAX_IOVEC; 85*a90cf9f2SGordon Ross vdb->vdb_uio.uio_resid = Length; 86*a90cf9f2SGordon Ross vdb->vdb_uio.uio_loffset = (offset_t)Offset; 87*a90cf9f2SGordon Ross vdb->vdb_uio.uio_segflg = UIO_SYSSPACE; 88*a90cf9f2SGordon Ross vdb->vdb_uio.uio_extflg = UIO_COPY_DEFAULT; 89*a90cf9f2SGordon Ross 90*a90cf9f2SGordon Ross sr->raw_data.max_bytes = Length; 91*a90cf9f2SGordon Ross m = smb_mbuf_allocate(&vdb->vdb_uio); 92*a90cf9f2SGordon Ross 93*a90cf9f2SGordon Ross switch (of->f_tree->t_res_type & STYPE_MASK) { 94*a90cf9f2SGordon Ross case STYPE_DISKTREE: 95*a90cf9f2SGordon Ross if (!smb_node_is_dir(of->f_node)) { 96*a90cf9f2SGordon Ross /* Check for conflicting locks. */ 97*a90cf9f2SGordon Ross rc = smb_lock_range_access(sr, of->f_node, 98*a90cf9f2SGordon Ross Offset, Length, B_FALSE); 99*a90cf9f2SGordon Ross if (rc) { 100*a90cf9f2SGordon Ross rc = ERANGE; 101*a90cf9f2SGordon Ross break; 102*a90cf9f2SGordon Ross } 103*a90cf9f2SGordon Ross } 104*a90cf9f2SGordon Ross rc = smb_fsop_read(sr, of->f_cr, of->f_node, &vdb->vdb_uio); 105*a90cf9f2SGordon Ross break; 106*a90cf9f2SGordon Ross case STYPE_IPC: 107*a90cf9f2SGordon Ross rc = smb_opipe_read(sr, &vdb->vdb_uio); 108*a90cf9f2SGordon Ross break; 109*a90cf9f2SGordon Ross default: 110*a90cf9f2SGordon Ross case STYPE_PRINTQ: 111*a90cf9f2SGordon Ross rc = EACCES; 112*a90cf9f2SGordon Ross break; 113*a90cf9f2SGordon Ross } 114*a90cf9f2SGordon Ross 115*a90cf9f2SGordon Ross /* How much data we moved. */ 116*a90cf9f2SGordon Ross XferCount = Length - vdb->vdb_uio.uio_resid; 117*a90cf9f2SGordon Ross 118*a90cf9f2SGordon Ross sr->raw_data.max_bytes = XferCount; 119*a90cf9f2SGordon Ross smb_mbuf_trim(m, XferCount); 120*a90cf9f2SGordon Ross MBC_ATTACH_MBUF(&sr->raw_data, m); 121*a90cf9f2SGordon Ross 122*a90cf9f2SGordon Ross /* 123*a90cf9f2SGordon Ross * Checking the error return _after_ dealing with 124*a90cf9f2SGordon Ross * the returned data so that if m was allocated, 125*a90cf9f2SGordon Ross * it will be free'd via sr->raw_data cleanup. 126*a90cf9f2SGordon Ross */ 127*a90cf9f2SGordon Ross if (rc) { 128*a90cf9f2SGordon Ross smb2sr_put_errno(sr, rc); 129*a90cf9f2SGordon Ross return (SDRC_SUCCESS); 130*a90cf9f2SGordon Ross } 131*a90cf9f2SGordon Ross 132*a90cf9f2SGordon Ross /* 133*a90cf9f2SGordon Ross * SMB2 Read reply 134*a90cf9f2SGordon Ross */ 135*a90cf9f2SGordon Ross DataOff = SMB2_HDR_SIZE + 16; 136*a90cf9f2SGordon Ross rc = smb_mbc_encodef( 137*a90cf9f2SGordon Ross &sr->reply, 138*a90cf9f2SGordon Ross "wb.lllC", 139*a90cf9f2SGordon Ross 17, /* StructSize */ /* w */ 140*a90cf9f2SGordon Ross DataOff, /* b. */ 141*a90cf9f2SGordon Ross XferCount, /* l */ 142*a90cf9f2SGordon Ross 0, /* DataRemaining */ /* l */ 143*a90cf9f2SGordon Ross 0, /* reserved */ /* l */ 144*a90cf9f2SGordon Ross &sr->raw_data); /* C */ 145*a90cf9f2SGordon Ross if (rc) 146*a90cf9f2SGordon Ross return (SDRC_ERROR); 147*a90cf9f2SGordon Ross 148*a90cf9f2SGordon Ross mutex_enter(&of->f_mutex); 149*a90cf9f2SGordon Ross of->f_seek_pos = Offset + XferCount; 150*a90cf9f2SGordon Ross mutex_exit(&of->f_mutex); 151*a90cf9f2SGordon Ross 152*a90cf9f2SGordon Ross return (SDRC_SUCCESS); 153*a90cf9f2SGordon Ross } 154