diff options
| author | Karel Zak | 2012-10-23 10:57:59 +0200 |
|---|---|---|
| committer | Karel Zak | 2012-10-23 12:15:58 +0200 |
| commit | d0f7e5b4a0a1b83e515c9fd894d74ed36d7da5c1 (patch) | |
| tree | 2d79269c4ab7dd7369e7615e3a28ec73f756a375 /lib | |
| parent | lib/tt: don't ignore "extreme" columns if an free space is available (diff) | |
| download | kernel-qcow2-util-linux-d0f7e5b4a0a1b83e515c9fd894d74ed36d7da5c1.tar.gz kernel-qcow2-util-linux-d0f7e5b4a0a1b83e515c9fd894d74ed36d7da5c1.tar.xz kernel-qcow2-util-linux-d0f7e5b4a0a1b83e515c9fd894d74ed36d7da5c1.zip | |
include/sysfs: add SCSI host:channel:target:lun support
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sysfs.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/lib/sysfs.c b/lib/sysfs.c index 1384acda6..4cb6284ca 100644 --- a/lib/sysfs.c +++ b/lib/sysfs.c @@ -173,10 +173,9 @@ void sysfs_deinit(struct sysfs_cxt *cxt) close(cxt->dir_fd); free(cxt->dir_path); - cxt->devno = 0; + memset(cxt, 0, sizeof(*cxt)); + cxt->dir_fd = -1; - cxt->parent = NULL; - cxt->dir_path = NULL; } int sysfs_stat(struct sysfs_cxt *cxt, const char *attr, struct stat *st) @@ -636,6 +635,43 @@ err: return -1; } + +int sysfs_scsi_get_hctl(struct sysfs_cxt *cxt, int *h, int *c, int *t, int *l) +{ + char buf[PATH_MAX], *hctl; + ssize_t len; + + if (!cxt) + return -EINVAL; + if (cxt->has_hctl) + goto done; + + len = sysfs_readlink(cxt, "device", buf, sizeof(buf)); + if (len < 0) + return len; + + buf[len] = '\0'; + hctl = strrchr(buf, '/') + 1; + if (!hctl) + return -1; + + if (sscanf(hctl, "%d:%d:%d:%d", &cxt->scsi_host, &cxt->scsi_channel, + &cxt->scsi_target, &cxt->scsi_lun) != 4) + return -1; + + cxt->has_hctl = 1; +done: + if (h) + *h = cxt->scsi_host; + if (c) + *c = cxt->scsi_channel; + if (t) + *t = cxt->scsi_target; + if (l) + *l = cxt->scsi_lun; + return 0; +} + #ifdef TEST_PROGRAM_SYSFS #include <errno.h> #include <err.h> |