usb: gadget: Add per-lun inquiry string

[cascardo/linux.git] / drivers / usb / gadget / function / storage_common.c

diff --git a/drivers/usb/gadget/function/storage_common.c b/drivers/usb/gadget/function/storage_common.c
index 990df22..8fbf686 100644 (file)
--- a/drivers/usb/gadget/function/storage_common.c
+++ b/drivers/usb/gadget/function/storage_common.c
@@ -369,6 +369,12 @@ ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf)
 }
 EXPORT_SYMBOL_GPL(fsg_show_removable);
 
+ssize_t fsg_show_inquiry_string(struct fsg_lun *curlun, char *buf)
+{
+       return sprintf(buf, "%s\n", curlun->inquiry_string);
+}
+EXPORT_SYMBOL_GPL(fsg_show_inquiry_string);
+
 /*
  * The caller must hold fsg->filesem for reading when calling this function.
  */
@@ -499,4 +505,22 @@ ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
 }
 EXPORT_SYMBOL_GPL(fsg_store_removable);
 
+ssize_t fsg_store_inquiry_string(struct fsg_lun *curlun, const char *buf,
+                                size_t count)
+{
+       const size_t len = min(count, sizeof(curlun->inquiry_string));
+
+       if (len == 0 || buf[0] == '\n') {
+               curlun->inquiry_string[0] = 0;
+       } else {
+               snprintf(curlun->inquiry_string,
+                        sizeof(curlun->inquiry_string), "%-28s", buf);
+               if (curlun->inquiry_string[len-1] == '\n')
+                       curlun->inquiry_string[len-1] = ' ';
+       }
+
+       return count;
+}
+EXPORT_SYMBOL_GPL(fsg_store_inquiry_string);
+
 MODULE_LICENSE("GPL");