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RFC kernel-boot: Update udev rules and rdma_rename to handle auxiliary devices #1248

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RFC kernel-boot: Update udev rules and rdma_rename to handle auxiliary devices #1248

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2 changes: 2 additions & 0 deletions kernel-boot/rdma-description.rules
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,8 @@ DRIVERS=="i40e", ENV{ID_RDMA_IWARP}="1"
DRIVERS=="be2net", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="bnxt_en", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="hns", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="irdma", KERNELS=="*iw*", ENV{ID_RDMA_IWARP}="1"
DRIVERS=="irdma", KERNELS=="*roce*", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="mlx4_core", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="mlx5_core", ENV{ID_RDMA_ROCE}="1"
DRIVERS=="qede", ENV{ID_RDMA_ROCE}="1"
Expand Down
172 changes: 136 additions & 36 deletions kernel-boot/rdma_rename.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
#include <netlink/attr.h>
#include <linux/pci_regs.h>
#include <util/rdma_nl.h>
#include <libgen.h>
#include <limits.h>

/*
* Rename modes:
Expand Down Expand Up @@ -67,26 +69,104 @@ static bool debug_mode;
syslog(LOG_ERR, ##args); \
} while (0)

static bool match_subsystem_type(char *subsystem, const char *subs_type)
{
char buf[256] = {};
char *subs;
int ret;

ret = readlink(subsystem, buf, sizeof(buf)-1);
if (ret == -1 || ret == sizeof(buf)) {
return false;
}
buf[ret] = 0;
subs = basename(buf);

return !strcmp(subs, subs_type)? true: false;
}

static char *get_auxdev_path(struct data *d)
{
char buf[PATH_MAX] = {};
char aux_buf[256] = {};
char *dev_path = NULL;
char *aux_dev = NULL;
char *aux_path = NULL;
char *real_path, *aux_name;
int ret;

ret = asprintf(&aux_dev, "/sys/class/infiniband/%s/device", d->curr);
if (ret < 0)
goto out;

ret = readlink(aux_dev, aux_buf, sizeof(aux_buf)-1);
if (ret == -1 || ret == sizeof(aux_buf))
goto out;

aux_buf[ret] = 0;
aux_name = basename(aux_buf);
ret = asprintf(&aux_path, "/sys/bus/auxiliary/devices/%s", aux_name);
if (ret < 0)
goto out;

real_path = realpath(aux_path, buf);
if (!real_path)
goto out;

ret = asprintf(&dev_path, "%s", dirname(buf));
if (ret < 0)
dev_path = NULL;
out:
free(aux_dev);
free(aux_path);
return dev_path;
}

#define ONBOARD_INDEX_MAX (16*1024-1)
static int by_onboard(struct data *d)
{
char *subsystem = NULL;
char *dev_path = NULL;
char *index = NULL;
char *acpi = NULL;
unsigned int o;
FILE *fp;
int ret;

ret = asprintf(&subsystem, "/sys/class/infiniband/%s/device/subsystem",
d->curr);
if (ret < 0)
return -ENOMEM;

if (match_subsystem_type(subsystem, "auxiliary")) {
dev_path = get_auxdev_path(d);
if (!dev_path) {
ret = -EINVAL;
pr_dbg("%s: Unable to find an auxiliary device\n", d->curr);
goto out;
}
} else {
ret = asprintf(&dev_path, "/sys/class/infiniband/%s/device", d->curr);
if (ret < 0) {
dev_path = NULL;
ret = -ENOMEM;
goto out;
}
}

/*
* ACPI_DSM - device specific method for naming
* PCI or PCI Express device
*/
ret = asprintf(&acpi, "/sys/class/infiniband/%s/device/acpi_index",
d->curr);
if (ret < 0)
return -ENOMEM;
ret = asprintf(&acpi, "%s/acpi_index", dev_path);
if (ret < 0) {
acpi = NULL;
ret = -ENOMEM;
goto out;
}

/* SMBIOS type 41 - Onboard Devices Extended Information */
ret = asprintf(&index, "/sys/class/infiniband/%s/device/index", d->curr);
ret = asprintf(&index, "%s/index", dev_path);
if (ret < 0) {
index = NULL;
ret = -ENOMEM;
Expand Down Expand Up @@ -121,6 +201,8 @@ static int by_onboard(struct data *d)
}
ret = 0;
out:
free(subsystem);
free(dev_path);
free(index);
free(acpi);
return ret;
Expand Down Expand Up @@ -247,19 +329,22 @@ struct pci_info {
bool valid_vf;
};

static int fill_pci_info(struct data *d, struct pci_info *p)
static int fill_pci_info(struct data *d, struct pci_info *p, bool aux)
{
char buf[256] = {};
char *pci;
int ret;

ret = readlink(p->pcidev, buf, sizeof(buf)-1);
if (ret == -1 || ret == sizeof(buf))
return -EINVAL;

buf[ret] = 0;
if (aux) {
pci = basename(p->pcidev);
} else {
ret = readlink(p->pcidev, buf, sizeof(buf)-1);
if (ret == -1 || ret == sizeof(buf))
return -EINVAL;

pci = basename(buf);
buf[ret] = 0;
pci = basename(buf);
}
/*
* pci = 0000:00:0c.0
*/
Expand Down Expand Up @@ -289,7 +374,7 @@ static int fill_pci_info(struct data *d, struct pci_info *p)
return 0;
}

static int get_virtfn_info(struct data *d, struct pci_info *p)
static int get_virtfn_info(struct data *d, struct pci_info *p, bool aux)
{
struct pci_info vf = {};
char *physfn_pcidev;
Expand All @@ -315,7 +400,7 @@ static int get_virtfn_info(struct data *d, struct pci_info *p)

p->valid_vf = true;
vf.pcidev = p->pcidev;
ret = fill_pci_info(d, &vf);
ret = fill_pci_info(d, &vf, aux);
if (ret)
goto err_dir;

Expand All @@ -332,7 +417,7 @@ static int get_virtfn_info(struct data *d, struct pci_info *p)
ret = -ENOMEM;
goto err_dir;
}
ret = fill_pci_info(d, &v);
ret = fill_pci_info(d, &v, aux);
free(v.pcidev);
if (ret) {
ret = -ENOMEM;
Expand Down Expand Up @@ -362,42 +447,57 @@ static int by_pci(struct data *d)
struct pci_info p = {};
char *subsystem;
char buf[256] = {};
char *subs;
bool aux = false;
int ret;

ret = asprintf(&subsystem, "/sys/class/infiniband/%s/device/subsystem",
d->curr);
d->curr);
if (ret < 0)
return -ENOMEM;

ret = readlink(subsystem, buf, sizeof(buf)-1);
if (ret == -1 || ret == sizeof(buf)) {
ret = -EINVAL;
goto out;
}
buf[ret] = 0;
if (match_subsystem_type(subsystem, "pci")) {
/* Real devices */
ret = asprintf(&p.pcidev, "/sys/class/infiniband/%s/device", d->curr);
if (ret < 0) {
ret = -ENOMEM;
p.pcidev = NULL;
goto out;
}

subs = basename(buf);
if (strcmp(subs, "pci")) {
} else if (match_subsystem_type(subsystem, "auxiliary")) {
aux = true;
p.pcidev = get_auxdev_path(d);
if (!p.pcidev) {
pr_dbg("%s: Unable to find auxiliary device\n", d->curr);
ret = -EINVAL;
goto out;
}

free(subsystem);
ret = asprintf(&subsystem, "%s/subsystem", p.pcidev);
if (ret < 0) {
subsystem = NULL;
ret = -ENOMEM;
goto out;
}

if (!match_subsystem_type(subsystem, "pci")) {
pr_dbg("%s: Non-PCI device was detected\n", d->curr);
ret = -EINVAL;
goto out;
}
} else {
/* Ball out virtual devices */
pr_dbg("%s: Non-PCI device (%s) was detected\n", d->curr, subs);
pr_dbg("%s: Non-PCI device (%s) was detected\n", d->curr, subsystem);
ret = -EINVAL;
goto out;
}

/* Real devices */
ret = asprintf(&p.pcidev, "/sys/class/infiniband/%s/device", d->curr);
if (ret < 0) {
ret = -ENOMEM;
p.pcidev = NULL;
goto out;
}

ret = get_virtfn_info(d, &p);
ret = get_virtfn_info(d, &p, aux);
if (ret)
goto out;

ret = fill_pci_info(d, &p);
ret = fill_pci_info(d, &p, aux);
if (ret) {
pr_err("%s: Failed to fill PCI device information\n", d->curr);
goto out;
Expand Down