pxe: add a "pxeretry" option to deal with 404's in web appssyslinux-4.03-pre2

For web downloads, sometimes a mirror site will not be fully synced.
Add an option to retry the open a specific number of times before
giving up.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/core/fs/pxe/pxe.c b/core/fs/pxe/pxe.c
index 0238ed4b..a1e40974 100644
--- a/core/fs/pxe/pxe.c
+++ b/core/fs/pxe/pxe.c
@@ -642,8 +642,22 @@ static uint32_t pxe_getfssec(struct file *file, char *buf,
  * @out: the lenght of this file, stores in file->file_len
  *
  */
+static void __pxe_searchdir(const char *filename, struct file *file);
+extern uint16_t PXERetry;
+
 static void pxe_searchdir(const char *filename, struct file *file)
 {
+    int i = PXERetry;
+
+    do {
+	dprintf("PXE: file = %p, retries left = %d: ", file, i);
+	__pxe_searchdir(filename, file);
+	dprintf("%s\n", file->inode ? "ok" : "failed");
+    } while (!file->inode && i--);
+}
+
+static void __pxe_searchdir(const char *filename, struct file *file)
+{
     struct fs_info *fs = file->fs;
     struct inode *inode;
     struct pxe_pvt_inode *socket;