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author | bigbiff bigbiff <bigbiff@teamw.in> | 2013-02-23 02:55:50 +0100 |
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committer | bigbiff bigbiff <bigbiff@teamw.in> | 2013-02-25 15:06:46 +0100 |
commit | e60683a0d553b6488c564863f4e48954944fb0f8 (patch) | |
tree | 9364f97cb88b7c1359f5f06dfb32150a78168c31 /libblkid/ioctl.c | |
parent | Fix building of updater for 4.2 environment (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | libblkid/ioctl.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libblkid/ioctl.c b/libblkid/ioctl.c new file mode 100644 index 000000000..3aba09e4f --- /dev/null +++ b/libblkid/ioctl.c @@ -0,0 +1,74 @@ +/* + * ioctl based topology -- gathers topology information + * + * Copyright (C) 2009 Karel Zak <kzak@redhat.com> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + * + */ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <stdint.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> +#include <errno.h> + +#include "topology.h" + +/* + * ioctl topology values + */ +static struct topology_val { + + long ioc; + + /* functions to set probing result */ + int (*set_ulong)(blkid_probe, unsigned long); + int (*set_int)(blkid_probe, int); + +} topology_vals[] = { + { BLKALIGNOFF, NULL, blkid_topology_set_alignment_offset }, + { BLKIOMIN, blkid_topology_set_minimum_io_size }, + { BLKIOOPT, blkid_topology_set_optimal_io_size }, + { BLKPBSZGET, blkid_topology_set_physical_sector_size } + /* we read BLKSSZGET in topology.c */ +}; + +static int probe_ioctl_tp(blkid_probe pr, + const struct blkid_idmag *mag __attribute__((__unused__))) +{ + size_t i; + + for (i = 0; i < ARRAY_SIZE(topology_vals); i++) { + struct topology_val *val = &topology_vals[i]; + int rc = 1; + unsigned int data; + + if (ioctl(pr->fd, val->ioc, &data) == -1) + goto nothing; + + if (val->set_int) + rc = val->set_int(pr, (int) data); + else + rc = val->set_ulong(pr, (unsigned long) data); + if (rc) + goto err; + } + + return 0; +nothing: + return 1; +err: + return -1; +} + +const struct blkid_idinfo ioctl_tp_idinfo = +{ + .name = "ioctl", + .probefunc = probe_ioctl_tp, + .magics = BLKID_NONE_MAGIC +}; + |