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path_id: rename scsi sub-fuctions

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This commit is contained in:
Kay Sievers 2009-06-08 19:22:53 +02:00
parent 45798927f8
commit 67dd1cdf9d
1 changed files with 58 additions and 68 deletions
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126
extras/path_id/path_id.c
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@ -89,52 +89,7 @@ static struct udev_device *skip_subsystem(struct udev_device *dev, const char *s
return dev;
}
/* find smallest number of instances of <syspath>/<name><number> */
static int base_number(const char *syspath, const char *name)
{
char *base;
char *pos;
DIR *dir;
struct dirent *dent;
size_t len;
int number = -1;
base = strdup(syspath);
if (base == NULL)
goto out;
pos = strrchr(base, '/');
if (pos == NULL)
goto out;
pos[0] = '\0';
len = strlen(name);
dir = opendir(base);
if (dir == NULL)
goto out;
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char *rest;
int i;
if (dent->d_name[0] == '.')
continue;
if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
continue;
if (strncmp(dent->d_name, name, len) != 0)
continue;
i = strtoul(&dent->d_name[len], &rest, 10);
if (rest[0] != '\0')
continue;
if (number == -1 || i < number)
number = i;
}
closedir(dir);
out:
free(base);
return number;
}
static struct udev_device *handle_fc(struct udev_device *parent, char **path)
static struct udev_device *handle_scsi_fibre_channel(struct udev_device *parent, char **path)
{
struct udev *udev = udev_device_get_udev(parent);
struct udev_device *targetdev;
@ -162,12 +117,12 @@ out:
return parent;
}
static struct udev_device *handle_sas(struct udev_device *parent, char **path)
static struct udev_device *handle_scsi_sas(struct udev_device *parent, char **path)
{
return NULL;
}
static struct udev_device *handle_iscsi(struct udev_device *parent, char **path)
static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **path)
{
struct udev *udev = udev_device_get_udev(parent);
struct udev_device *transportdev;
@ -178,7 +133,7 @@ static struct udev_device *handle_iscsi(struct udev_device *parent, char **path)
const char *addr;
const char *port;
/* find iscsi session */
/* find iscsi session */
transportdev = parent;
while (1) {
transportdev = udev_device_get_parent(transportdev);
@ -224,32 +179,71 @@ out:
return parent;
}
static struct udev_device *handle_scsi(struct udev_device *parent, char **path)
static struct udev_device *handle_scsi_default(struct udev_device *parent, char **path)
{
struct udev_device *hostdev;
int host, bus, target, lun;
const char *name;
int base;
char *base;
char *pos;
DIR *dir;
struct dirent *dent;
int basenum;
hostdev = udev_device_get_parent_with_subsystem_devtype(parent, "scsi", "scsi_host");
if (hostdev == NULL)
return parent;
return NULL;
name = udev_device_get_sysname(parent);
if (sscanf(name, "%d:%d:%d:%d", &host, &bus, &target, &lun) != 4)
return parent;
return NULL;
/* rebase host offset to get the local relative number */
base = base_number(udev_device_get_syspath(hostdev), "host");
if (base < 0)
return parent;
host -= base;
basenum = -1;
base = strdup(udev_device_get_syspath(hostdev));
if (base == NULL)
return NULL;
pos = strrchr(base, '/');
if (pos == NULL) {
parent = NULL;
goto out;
}
pos[0] = '\0';
dir = opendir(base);
if (dir == NULL) {
parent = NULL;
goto out;
}
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char *rest;
int i;
if (dent->d_name[0] == '.')
continue;
if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
continue;
if (strncmp(dent->d_name, "host", 4) != 0)
continue;
i = strtoul(&dent->d_name[4], &rest, 10);
if (rest[0] != '\0')
continue;
if (basenum == -1 || i < basenum)
basenum = i;
}
closedir(dir);
if (basenum == -1) {
parent = NULL;
goto out;
}
host -= basenum;
path_prepend(path, "scsi-%u:%u:%u:%u", host, bus, target, lun);
out:
free(base);
return hostdev;
}
static struct udev_device *handle_scsi_lun(struct udev_device *parent, char **path)
static struct udev_device *handle_scsi(struct udev_device *parent, char **path)
{
const char *devtype;
const char *name;
@ -267,29 +261,25 @@ static struct udev_device *handle_scsi_lun(struct udev_device *parent, char **pa
goto out;
}
/* broken scsi transport devices would need a subsystem */
/* lousy scsi sysfs does not have a "subsystem" for the transport */
name = udev_device_get_syspath(parent);
/* fibre channel */
if (strstr(name, "/rport-") != NULL) {
parent = handle_fc(parent, path);
parent = handle_scsi_fibre_channel(parent, path);
goto out;
}
/* sas */
if (strstr(name, "/end_device-") != NULL) {
parent = handle_sas(parent, path);
parent = handle_scsi_sas(parent, path);
goto out;
}
/* iSCSI */
if (strstr(name, "/session") != NULL) {
parent = handle_iscsi(parent, path);
parent = handle_scsi_iscsi(parent, path);
goto out;
}
/* default */
parent = handle_scsi(parent, path);
parent = handle_scsi_default(parent, path);
out:
return parent;
}
@ -439,7 +429,7 @@ int main(int argc, char **argv)
} else if (strcmp(subsys, "scsi_tape") == 0) {
handle_scsi_tape(parent, &path_suffix);
} else if (strcmp(subsys, "scsi") == 0) {
parent = handle_scsi_lun(parent, &path);
parent = handle_scsi(parent, &path);
} else if (strcmp(subsys, "cciss") == 0) {
handle_cciss(parent, &path);
} else if (strcmp(subsys, "usb") == 0) {