[PATCH] update udev to include scsi_id 0.6

[elogind.git] / extras / scsi_id / scsi_serial.c

diff --git a/extras/scsi_id/scsi_serial.c b/extras/scsi_id/scsi_serial.c
index e0074b662d3a9692b1c17f253c753eebfbc825b8..0db756404c721c25499495297190570ed563009e 100644 (file)
--- a/extras/scsi_id/scsi_serial.c
+++ b/extras/scsi_id/scsi_serial.c
@@ -300,17 +300,12 @@ static int scsi_inquiry(struct sysfs_device *scsi_dev, int fd, unsigned
        unsigned char sense[SENSE_BUFF_LEN];
        struct sg_io_hdr io_hdr;
        int retval;
-       unsigned char *inq;
-       unsigned char *buffer;
        int retry = 3; /* rather random */
 
-       if (buflen > 255) {
+       if (buflen > SCSI_INQ_BUFF_LEN) {
                log_message(LOG_WARNING, "buflen %d too long\n", buflen);
                return -1;
        }
-       inq = malloc(OFFSET + sizeof (inq_cmd) + 512);
-       memset(inq, 0, OFFSET + sizeof (inq_cmd) + 512);
-       buffer = inq + OFFSET;
 
 resend:
        dprintf("%s evpd %d, page 0x%x\n", scsi_dev->name, evpd, page);
@@ -321,7 +316,7 @@ resend:
        io_hdr.mx_sb_len = sizeof(sense);
        io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
        io_hdr.dxfer_len = buflen;
-       io_hdr.dxferp = buffer;
+       io_hdr.dxferp = buf;
        io_hdr.cmdp = inq_cmd;
        io_hdr.sbp = sense;
        io_hdr.timeout = DEF_TIMEOUT;
@@ -329,7 +324,8 @@ resend:
        if (ioctl(fd, SG_IO, &io_hdr) < 0) {
                log_message(LOG_WARNING, "%s: ioctl failed: %s\n",
                            scsi_dev->name, strerror(errno));
-               return -1;
+               retval = -1;
+               goto error;
        }
 
        retval = sg_err_category3(&io_hdr);
@@ -346,7 +342,6 @@ resend:
 
        if (!retval) {
                retval = buflen;
-               memcpy(buf, buffer, retval);
        } else if (retval > 0) {
                if (--retry > 0) {
                        dprintf("%s: Retrying ...\n", scsi_dev->name);
@@ -355,15 +350,16 @@ resend:
                retval = -1;
        }
 
+error:
        if (retval < 0)
                log_message(LOG_WARNING,
                            "%s: Unable to get INQUIRY vpd %d page 0x%x.\n",
                            scsi_dev->name, evpd, page);
 
-       free(inq);
        return retval;
 }
 
+/* Get list of supported EVPD pages */
 static int do_scsi_page0_inquiry(struct sysfs_device *scsi_dev, int fd,
                                 char *buffer, int len)
 {
@@ -552,15 +548,17 @@ static int check_fill_0x83_id(struct sysfs_device *scsi_dev, char
        return 0;
 }
 
+/* Get device identification VPD page */
 static int do_scsi_page83_inquiry(struct sysfs_device *scsi_dev, int fd,
                                  char *serial, int len)
 {
        int retval;
        int id_ind, j;
-       unsigned char page_83[256];
+       unsigned char page_83[SCSI_INQ_BUFF_LEN];
 
-       memset(page_83, 0, 256);
-       retval = scsi_inquiry(scsi_dev, fd, 1, 0x83, page_83, 255);
+       memset(page_83, 0, SCSI_INQ_BUFF_LEN);
+       retval = scsi_inquiry(scsi_dev, fd, 1, 0x83, page_83,
+                             SCSI_INQ_BUFF_LEN);
        if (retval < 0)
                return 1;
 
@@ -609,6 +607,7 @@ static int do_scsi_page83_inquiry(struct sysfs_device *scsi_dev, int fd,
        return 1;
 }
 
+/* Get unit serial number VPD page */
 static int do_scsi_page80_inquiry(struct sysfs_device *scsi_dev, int fd,
                                  char *serial, int max_len)
 {
@@ -616,10 +615,10 @@ static int do_scsi_page80_inquiry(struct sysfs_device *scsi_dev, int fd,
        int ser_ind;
        int i;
        int len;
-       unsigned char buf[256];
+       unsigned char buf[SCSI_INQ_BUFF_LEN];
 
-       memset(buf, 0, 256);
-       retval = scsi_inquiry(scsi_dev, fd, 1, 0x80, buf, 255);
+       memset(buf, 0, SCSI_INQ_BUFF_LEN);
+       retval = scsi_inquiry(scsi_dev, fd, 1, 0x80, buf, SCSI_INQ_BUFF_LEN);
        if (retval < 0)
                return retval;
 
@@ -652,13 +651,11 @@ static int do_scsi_page80_inquiry(struct sysfs_device *scsi_dev, int fd,
 int scsi_get_serial (struct sysfs_device *scsi_dev, const char *devname,
                     int page_code, char *serial, int len)
 {
-       unsigned char page0[256];
+       unsigned char page0[SCSI_INQ_BUFF_LEN];
        int fd;
        int ind;
        int retval;
 
-       if (len > 255) {
-       }
        memset(serial, 0, len);
        dprintf("opening %s\n", devname);
        fd = open(devname, O_RDONLY | O_NONBLOCK);
@@ -694,7 +691,7 @@ int scsi_get_serial (struct sysfs_device *scsi_dev, const char *devname,
         * Get page 0, the page of the pages. By default, try from best to
         * worst of supported pages: 0x83 then 0x80.
         */
-       if (do_scsi_page0_inquiry(scsi_dev, fd, page0, 255)) {
+       if (do_scsi_page0_inquiry(scsi_dev, fd, page0, SCSI_INQ_BUFF_LEN)) {
                /*
                 * Don't try anything else. Black list if a specific page
                 * should be used for this vendor+model, or maybe have an