imsm: add devpath_to_char method
Add method for reading sysfs attributes and propagate it across IMSM code. Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com> Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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@ -239,6 +239,29 @@ __u16 devpath_to_vendor(const char *dev_path)
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return id;
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}
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/* Description: Read text value of dev_path/entry field
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* Parameters:
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* dev_path - sysfs path to the device
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* entry - entry to be read
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* buf - buffer for read value
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* len - size of buf
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* verbose - error logging level
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*/
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int devpath_to_char(const char *dev_path, const char *entry, char *buf, int len,
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int verbose)
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{
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char path[PATH_MAX];
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snprintf(path, sizeof(path), "%s/%s", dev_path, entry);
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if (load_sys(path, buf, len)) {
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if (verbose)
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pr_err("Cannot read %s, aborting\n", path);
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return 1;
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}
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return 0;
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}
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struct sys_dev *find_intel_devices(void)
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{
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struct sys_dev *ahci, *isci, *nvme;
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@ -238,6 +238,8 @@ static inline char *guid_str(char *buf, struct efi_guid guid)
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char *get_nvme_multipath_dev_hw_path(const char *dev_path);
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char *diskfd_to_devpath(int fd, int dev_level, char *buf);
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int devpath_to_char(const char *dev_path, const char *entry, char *buf,
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int len, int verbose);
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__u16 devpath_to_vendor(const char *dev_path);
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struct sys_dev *find_driver_devices(const char *bus, const char *driver);
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struct sys_dev *find_intel_devices(void);
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@ -2246,7 +2246,7 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
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char vendor[64];
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char buf[1024];
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int major, minor;
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char *device;
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char device[PATH_MAX];
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char *c;
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int port;
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int type;
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@ -2262,20 +2262,15 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
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continue;
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}
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/* retrieve the scsi device type */
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if (asprintf(&device, "/sys/dev/block/%d:%d/device/xxxxxxx", major, minor) < 0) {
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/* retrieve the scsi device */
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if (!devt_to_devpath(makedev(major, minor), 1, device)) {
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if (verbose > 0)
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pr_err("failed to allocate 'device'\n");
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pr_err("failed to get device\n");
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err = 2;
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break;
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}
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sprintf(device, "/sys/dev/block/%d:%d/device/type", major, minor);
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if (load_sys(device, buf, sizeof(buf)) != 0) {
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if (verbose > 0)
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pr_err("failed to read device type for %s\n",
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path);
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if (devpath_to_char(device, "type", buf, sizeof(buf), 0)) {
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err = 2;
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free(device);
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break;
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}
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type = strtoul(buf, NULL, 10);
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@ -2284,8 +2279,9 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
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if (!(type == 0 || type == 7 || type == 14)) {
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vendor[0] = '\0';
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model[0] = '\0';
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sprintf(device, "/sys/dev/block/%d:%d/device/vendor", major, minor);
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if (load_sys(device, buf, sizeof(buf)) == 0) {
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if (devpath_to_char(device, "vendor", buf,
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sizeof(buf), 0) == 0) {
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strncpy(vendor, buf, sizeof(vendor));
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vendor[sizeof(vendor) - 1] = '\0';
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c = (char *) &vendor[sizeof(vendor) - 1];
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@ -2293,8 +2289,9 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
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*c-- = '\0';
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}
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sprintf(device, "/sys/dev/block/%d:%d/device/model", major, minor);
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if (load_sys(device, buf, sizeof(buf)) == 0) {
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if (devpath_to_char(device, "model", buf,
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sizeof(buf), 0) == 0) {
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strncpy(model, buf, sizeof(model));
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model[sizeof(model) - 1] = '\0';
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c = (char *) &model[sizeof(model) - 1];
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@ -2319,7 +2316,6 @@ static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_b
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}
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} else
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buf[0] = '\0';
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free(device);
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/* chop device path to 'host%d' and calculate the port number */
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c = strchr(&path[hba_len], '/');
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@ -4026,7 +4022,7 @@ static void fd2devname(int fd, char *name)
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static int nvme_get_serial(int fd, void *buf, size_t buf_len)
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{
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char path[60];
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char path[PATH_MAX];
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char *name = fd2kname(fd);
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if (!name)
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@ -4035,9 +4031,10 @@ static int nvme_get_serial(int fd, void *buf, size_t buf_len)
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if (strncmp(name, "nvme", 4) != 0)
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return 1;
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snprintf(path, sizeof(path) - 1, "/sys/block/%s/device/serial", name);
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if (!diskfd_to_devpath(fd, 1, path))
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return 1;
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return load_sys(path, buf, buf_len);
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return devpath_to_char(path, "serial", buf, buf_len, 0);
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}
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extern int scsi_get_serial(int fd, void *buf, size_t buf_len);
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