projects / thirdparty / xfsprogs-dev.git / blame
| Commit | Line | Data |
|---|---|---|
| f937adac | 1 | /* |
| 9911e5dc | 2 | * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. |
| f937adac NS |
3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of version 2 of the GNU General Public License as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it would be useful, but | |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| 11 | * | |
| 12 | * Further, this software is distributed without any warranty that it is | |
| 13 | * free of the rightful claim of any third person regarding infringement | |
| 14 | * or the like. Any license provided herein, whether implied or | |
| 15 | * otherwise, applies only to this software file. Patent licenses, if | |
| 16 | * any, provided herein do not apply to combinations of this program with | |
| 17 | * other software, or any other product whatsoever. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU General Public License along | |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
| 22 | * | |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
| 24 | * Mountain View, CA 94043, or: | |
| 25 | * | |
| 26 | * http://www.sgi.com | |
| 27 | * | |
| 28 | * For further information regarding this notice, see: | |
| 29 | * | |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
| 31 | */ | |
| 32 | ||
| 33 | #include <stdio.h> | |
| 34 | #include <fcntl.h> | |
| e6c5396e | 35 | #include <stdlib.h> |
| f937adac NS |
36 | #include <volume.h> |
| 37 | #include <sys/stat.h> | |
| 38 | #include "md.h" | |
| 39 | ||
| d5dca43b NS |
40 | int |
| 41 | mnt_is_md_subvol(dev_t dev) | |
| 42 | { | |
| 43 | if (dev >> 8 == MD_MAJOR) | |
| 44 | return 1; | |
| 45 | return 0; | |
| 46 | } | |
| 47 | ||
| f937adac NS |
48 | int |
| 49 | md_get_subvol_stripe( | |
| 50 | char *dfile, | |
| 51 | sv_type_t type, | |
| 52 | int *sunit, | |
| 53 | int *swidth, | |
| 54 | struct stat64 *sb) | |
| 55 | { | |
| d5dca43b | 56 | if (mnt_is_md_subvol(sb->st_rdev)) { |
| f937adac NS |
57 | struct md_array_info_s md; |
| 58 | int fd; | |
| 59 | ||
| 60 | /* Open device */ | |
| 61 | fd = open(dfile, O_RDONLY); | |
| 62 | if (fd == -1) | |
| 63 | return 0; | |
| 64 | ||
| 65 | /* Is this thing on... */ | |
| 66 | if (ioctl(fd, GET_ARRAY_INFO, &md)) { | |
| 67 | fprintf(stderr, "Error getting MD array info from %s\n", | |
| 68 | dfile); | |
| 69 | exit(1); | |
| 70 | } | |
| 71 | ||
| 72 | /* Check state */ | |
| 73 | if (md.state) { | |
| 74 | fprintf(stderr, "MD array %s not in clean state\n", | |
| 75 | dfile); | |
| 76 | exit(1); | |
| 77 | } | |
| 78 | ||
| 79 | /* Deduct a disk from stripe width on RAID4/5 */ | |
| 80 | if (md.level == 4 || md.level == 5) | |
| 81 | md.nr_disks--; | |
| 82 | ||
| 83 | /* Update sizes */ | |
| 84 | *sunit = md.chunk_size >> 9; | |
| 85 | *swidth = *sunit * md.nr_disks; | |
| 86 | ||
| 87 | return 1; | |
| 88 | } | |
| 89 | return 0; | |
| 90 | } |