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Commit | Line | Data |
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f937adac | 1 | /* |
da23017d NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
dfc130f3 | 4 | * |
da23017d NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
f937adac | 7 | * published by the Free Software Foundation. |
dfc130f3 | 8 | * |
da23017d NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
dfc130f3 | 13 | * |
da23017d NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
f937adac NS |
17 | */ |
18 | ||
19 | #include <stdio.h> | |
20 | #include <fcntl.h> | |
a400ab25 | 21 | #include <stdlib.h> |
f937adac NS |
22 | #include <unistd.h> |
23 | #include <sys/stat.h> | |
24 | #include <sys/ioctl.h> | |
1d7e80ee | 25 | #include <disk/volume.h> |
f937adac NS |
26 | #include "xvm.h" |
27 | ||
d5dca43b | 28 | int |
a400ab25 NS |
29 | mnt_is_xvm_subvol( |
30 | dev_t dev) | |
f937adac | 31 | { |
a400ab25 | 32 | return get_driver_block_major("xvm", major(dev)); |
f937adac NS |
33 | } |
34 | ||
35 | /* | |
36 | * If the logical device is a xvm striped volume, then it returns the | |
37 | * stripe unit and stripe width information. | |
38 | * Input parameters: the logical volume | |
39 | * the subvolume type - (SVTYPE_RT or | |
40 | * SVTYPE_DATA) | |
41 | * Output parameters: the stripe unit and width in 512 byte blocks | |
42 | * true/false - was this device an XVM volume? | |
43 | */ | |
44 | int | |
45 | xvm_get_subvol_stripe( | |
46 | char *dev, | |
47 | sv_type_t type, | |
48 | int *sunit, | |
49 | int *swidth, | |
c22b5fdf | 50 | int *sectalign, |
f937adac NS |
51 | struct stat64 *sb) |
52 | { | |
d5dca43b NS |
53 | int fd; |
54 | xvm_getdev_t getdev; | |
55 | xvm_subvol_stripe_t subvol_stripe; | |
56 | ||
57 | if (!mnt_is_xvm_subvol(sb->st_rdev)) | |
8e9bef16 NS |
58 | return 0; |
59 | ||
d5dca43b NS |
60 | /* |
61 | * This will actually open the data subvolume. | |
62 | */ | |
63 | if ((fd = open(dev, O_RDONLY)) < 0) | |
64 | return 0; | |
8e9bef16 | 65 | |
d5dca43b NS |
66 | /* |
67 | * Go and get the the information for the correct | |
68 | * subvolume. | |
69 | */ | |
70 | if (ioctl(fd, DIOCGETVOLDEV, &getdev) < 0) { | |
71 | close(fd); | |
72 | return 0; | |
73 | } | |
74 | if ( (type == SVTYPE_RT) && (getdev.rt_subvol_dev) ) | |
75 | subvol_stripe.dev = getdev.rt_subvol_dev; | |
76 | else if ( (type == SVTYPE_DATA) && (getdev.data_subvol_dev) ) | |
77 | subvol_stripe.dev = getdev.data_subvol_dev; | |
78 | else { | |
79 | close(fd); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | if (ioctl(fd, DIOCGETVOLSTRIPE, &subvol_stripe) < 0) { | |
84 | close(fd); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | *sunit = subvol_stripe.unit_size; | |
89 | *swidth = *sunit * subvol_stripe.width_size; | |
c22b5fdf | 90 | *sectalign = 0; |
d5dca43b NS |
91 | close(fd); |
92 | return 1; | |
f937adac | 93 | } |