mirror of
https://src.fedoraproject.org/rpms/grub2.git
synced 2024-11-24 22:35:28 +00:00
115 lines
3.8 KiB
Diff
115 lines
3.8 KiB
Diff
From f63be03880f3667f2fb75acaa02f633e265e01e5 Mon Sep 17 00:00:00 2001
|
|
From: Peter Jones <pjones@redhat.com>
|
|
Date: Mon, 15 Apr 2013 09:12:14 +0200
|
|
Subject: [PATCH 318/471] * grub-core/disk/efi/efidisk.c: Limit disk
|
|
read or write chunk to 0x500 sectors. Based on patch by Peter Jones.
|
|
|
|
---
|
|
ChangeLog | 7 +++++++
|
|
grub-core/disk/efi/efidisk.c | 50 +++++++++++++++++++++++++++++---------------
|
|
2 files changed, 40 insertions(+), 17 deletions(-)
|
|
|
|
diff --git a/ChangeLog b/ChangeLog
|
|
index 2dcf1f5..6f33ff1 100644
|
|
--- a/ChangeLog
|
|
+++ b/ChangeLog
|
|
@@ -1,4 +1,11 @@
|
|
2013-04-15 Vladimir Serbinenko <phcoder@gmail.com>
|
|
+2013-04-15 Peter Jones <pjones@redhat.com>
|
|
+
|
|
+ * grub-core/disk/efi/efidisk.c: Limit disk read or write chunk to 0x500
|
|
+ sectors.
|
|
+ Based on patch by Peter Jones.
|
|
+
|
|
+2013-04-15 Vladimir Serbinenko <phcoder@gmail.com>
|
|
|
|
Fix DMRAID partition handling.
|
|
|
|
diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c
|
|
index 28b9fa1..5a6fc63 100644
|
|
--- a/grub-core/disk/efi/efidisk.c
|
|
+++ b/grub-core/disk/efi/efidisk.c
|
|
@@ -528,9 +528,9 @@ grub_efidisk_close (struct grub_disk *disk __attribute__ ((unused)))
|
|
grub_dprintf ("efidisk", "closing %s\n", disk->name);
|
|
}
|
|
|
|
-static grub_err_t
|
|
-grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
- grub_size_t size, char *buf)
|
|
+static grub_efi_status_t
|
|
+grub_efidisk_readwrite (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
+ grub_size_t size, char *buf, int wr)
|
|
{
|
|
/* For now, use the disk io interface rather than the block io's. */
|
|
struct grub_efidisk_data *d;
|
|
@@ -540,14 +540,38 @@ grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
d = disk->data;
|
|
bio = d->block_io;
|
|
|
|
+ while (size > 0)
|
|
+ {
|
|
+ grub_size_t len;
|
|
+ len = 0x500;
|
|
+ if (len > size)
|
|
+ len = size;
|
|
+ status = efi_call_5 ((wr ? bio->write_blocks : bio->read_blocks), bio,
|
|
+ bio->media->media_id,
|
|
+ (grub_efi_uint64_t) sector,
|
|
+ (grub_efi_uintn_t) size << disk->log_sector_size,
|
|
+ buf);
|
|
+ size -= len;
|
|
+ buf += len << disk->log_sector_size;
|
|
+ sector += len;
|
|
+ if (status != GRUB_EFI_SUCCESS)
|
|
+ return status;
|
|
+ }
|
|
+ return GRUB_EFI_SUCCESS;
|
|
+}
|
|
+
|
|
+static grub_err_t
|
|
+grub_efidisk_read (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
+ grub_size_t size, char *buf)
|
|
+{
|
|
+ grub_efi_status_t status;
|
|
+
|
|
grub_dprintf ("efidisk",
|
|
"reading 0x%lx sectors at the sector 0x%llx from %s\n",
|
|
(unsigned long) size, (unsigned long long) sector, disk->name);
|
|
|
|
- status = efi_call_5 (bio->read_blocks, bio, bio->media->media_id,
|
|
- (grub_efi_uint64_t) sector,
|
|
- (grub_efi_uintn_t) size << disk->log_sector_size,
|
|
- buf);
|
|
+ status = grub_efidisk_readwrite (disk, sector, size, buf, 0);
|
|
+
|
|
if (status != GRUB_EFI_SUCCESS)
|
|
return grub_error (GRUB_ERR_READ_ERROR,
|
|
N_("failure reading sector 0x%llx from `%s'"),
|
|
@@ -561,22 +585,14 @@ static grub_err_t
|
|
grub_efidisk_write (struct grub_disk *disk, grub_disk_addr_t sector,
|
|
grub_size_t size, const char *buf)
|
|
{
|
|
- /* For now, use the disk io interface rather than the block io's. */
|
|
- struct grub_efidisk_data *d;
|
|
- grub_efi_block_io_t *bio;
|
|
grub_efi_status_t status;
|
|
|
|
- d = disk->data;
|
|
- bio = d->block_io;
|
|
-
|
|
grub_dprintf ("efidisk",
|
|
"writing 0x%lx sectors at the sector 0x%llx to %s\n",
|
|
(unsigned long) size, (unsigned long long) sector, disk->name);
|
|
|
|
- status = efi_call_5 (bio->write_blocks, bio, bio->media->media_id,
|
|
- (grub_efi_uint64_t) sector,
|
|
- (grub_efi_uintn_t) size << disk->log_sector_size,
|
|
- (void *) buf);
|
|
+ status = grub_efidisk_readwrite (disk, sector, size, (char *) buf, 1);
|
|
+
|
|
if (status != GRUB_EFI_SUCCESS)
|
|
return grub_error (GRUB_ERR_WRITE_ERROR,
|
|
N_("failure writing sector 0x%llx to `%s'"),
|
|
--
|
|
1.8.2.1
|
|
|