ata_raid_subr.c revision 1.1.2.2
1 1.1.2.2 wrstuden /* $NetBSD: ata_raid_subr.c,v 1.1.2.2 2008/09/24 16:38:51 wrstuden Exp $ */ 2 1.1.2.2 wrstuden 3 1.1.2.2 wrstuden /*- 4 1.1.2.2 wrstuden * Copyright (c) 2008 Juan Romero Pardines. 5 1.1.2.2 wrstuden * All rights reserved. 6 1.1.2.2 wrstuden * 7 1.1.2.2 wrstuden * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 wrstuden * modification, are permitted provided that the following conditions 9 1.1.2.2 wrstuden * are met: 10 1.1.2.2 wrstuden * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 wrstuden * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 wrstuden * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 wrstuden * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 wrstuden * documentation and/or other materials provided with the distribution. 15 1.1.2.2 wrstuden * 16 1.1.2.2 wrstuden * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 wrstuden * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 wrstuden * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 wrstuden * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 wrstuden * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 1.1.2.2 wrstuden * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 1.1.2.2 wrstuden * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 1.1.2.2 wrstuden * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 1.1.2.2 wrstuden * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 1.1.2.2 wrstuden * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.1.2.2 wrstuden */ 27 1.1.2.2 wrstuden 28 1.1.2.2 wrstuden #include <sys/cdefs.h> 29 1.1.2.2 wrstuden __KERNEL_RCSID(0, "$NetBSD: ata_raid_subr.c,v 1.1.2.2 2008/09/24 16:38:51 wrstuden Exp $"); 30 1.1.2.2 wrstuden 31 1.1.2.2 wrstuden #include <sys/param.h> 32 1.1.2.2 wrstuden #include <sys/systm.h> 33 1.1.2.2 wrstuden #include <sys/conf.h> 34 1.1.2.2 wrstuden #include <sys/kernel.h> 35 1.1.2.2 wrstuden #include <sys/dkio.h> 36 1.1.2.2 wrstuden #include <sys/disk.h> 37 1.1.2.2 wrstuden #include <sys/disklabel.h> 38 1.1.2.2 wrstuden #include <sys/fcntl.h> 39 1.1.2.2 wrstuden #include <sys/vnode.h> 40 1.1.2.2 wrstuden #include <sys/kauth.h> 41 1.1.2.2 wrstuden #include <sys/kmem.h> 42 1.1.2.2 wrstuden 43 1.1.2.2 wrstuden #include <dev/ata/ata_raidvar.h> 44 1.1.2.2 wrstuden 45 1.1.2.2 wrstuden struct ataraid_disk_vnode { 46 1.1.2.2 wrstuden struct ataraid_disk_info *adv_adi; 47 1.1.2.2 wrstuden struct vnode *adv_vnode; 48 1.1.2.2 wrstuden SLIST_ENTRY(ataraid_disk_vnode) adv_next; 49 1.1.2.2 wrstuden }; 50 1.1.2.2 wrstuden 51 1.1.2.2 wrstuden static SLIST_HEAD(, ataraid_disk_vnode) ataraid_disk_vnode_list = 52 1.1.2.2 wrstuden SLIST_HEAD_INITIALIZER(ataraid_disk_vnode_list); 53 1.1.2.2 wrstuden 54 1.1.2.2 wrstuden /* 55 1.1.2.2 wrstuden * Finds the RAW_PART vnode of the block device associated with a component 56 1.1.2.2 wrstuden * by looking at the singly linked list; otherwise creates, opens and 57 1.1.2.2 wrstuden * returns the vnode to the caller. 58 1.1.2.2 wrstuden */ 59 1.1.2.2 wrstuden struct vnode * 60 1.1.2.2 wrstuden ata_raid_disk_vnode_find(struct ataraid_disk_info *adi) 61 1.1.2.2 wrstuden { 62 1.1.2.2 wrstuden struct ataraid_disk_vnode *adv = NULL; 63 1.1.2.2 wrstuden struct vnode *vp = NULL; 64 1.1.2.2 wrstuden device_t devlist; 65 1.1.2.2 wrstuden int bmajor, error = 0; 66 1.1.2.2 wrstuden dev_t dev; 67 1.1.2.2 wrstuden 68 1.1.2.2 wrstuden SLIST_FOREACH(adv, &ataraid_disk_vnode_list, adv_next) { 69 1.1.2.2 wrstuden devlist = adv->adv_adi->adi_dev; 70 1.1.2.2 wrstuden if (strcmp(device_xname(devlist), 71 1.1.2.2 wrstuden device_xname(adi->adi_dev)) == 0) 72 1.1.2.2 wrstuden return adv->adv_vnode; 73 1.1.2.2 wrstuden } 74 1.1.2.2 wrstuden 75 1.1.2.2 wrstuden adv = NULL; 76 1.1.2.2 wrstuden adv = kmem_zalloc(sizeof(struct ataraid_disk_vnode), KM_SLEEP); 77 1.1.2.2 wrstuden 78 1.1.2.2 wrstuden bmajor = devsw_name2blk(device_xname(adi->adi_dev), NULL, 0); 79 1.1.2.2 wrstuden dev = MAKEDISKDEV(bmajor, device_unit(adi->adi_dev), RAW_PART); 80 1.1.2.2 wrstuden 81 1.1.2.2 wrstuden error = bdevvp(dev, &vp); 82 1.1.2.2 wrstuden if (error) { 83 1.1.2.2 wrstuden kmem_free(adv, sizeof(struct ataraid_disk_vnode)); 84 1.1.2.2 wrstuden return NULL; 85 1.1.2.2 wrstuden } 86 1.1.2.2 wrstuden error = VOP_OPEN(vp, FREAD|FWRITE, NOCRED); 87 1.1.2.2 wrstuden if (error) { 88 1.1.2.2 wrstuden vput(vp); 89 1.1.2.2 wrstuden kmem_free(adv, sizeof(struct ataraid_disk_vnode)); 90 1.1.2.2 wrstuden return NULL; 91 1.1.2.2 wrstuden } 92 1.1.2.2 wrstuden vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 93 1.1.2.2 wrstuden VOP_UNLOCK(vp, 0); 94 1.1.2.2 wrstuden 95 1.1.2.2 wrstuden adv->adv_adi = adi; 96 1.1.2.2 wrstuden adv->adv_vnode = vp; 97 1.1.2.2 wrstuden 98 1.1.2.2 wrstuden SLIST_INSERT_HEAD(&ataraid_disk_vnode_list, adv, adv_next); 99 1.1.2.2 wrstuden 100 1.1.2.2 wrstuden return adv->adv_vnode; 101 1.1.2.2 wrstuden } 102
Indexes created Sun Oct 12 09:09:55 GMT 2025