diff options
Diffstat (limited to 'source/a/efibootmgr/efibootmgr-0.5.4-support-4k-sectors.patch')
| -rw-r--r-- | source/a/efibootmgr/efibootmgr-0.5.4-support-4k-sectors.patch | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/source/a/efibootmgr/efibootmgr-0.5.4-support-4k-sectors.patch b/source/a/efibootmgr/efibootmgr-0.5.4-support-4k-sectors.patch new file mode 100644 index 00000000..c380c610 --- /dev/null +++ b/source/a/efibootmgr/efibootmgr-0.5.4-support-4k-sectors.patch @@ -0,0 +1,176 @@ +Return-Path: pjones@redhat.com
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+ Wed, 14 Jul 2010 14:25:52 -0400
+From: Peter Jones <pjones@redhat.com>
+To: Matt Domsch <Matt_Domsch@dell.com>
+Cc: Peter Jones <pjones@redhat.com>, Stuart Hayes <stuart_hayes@dell.com>
+Subject: [efibootmgr patch] Handle sector_size != 512.
+Date: Wed, 14 Jul 2010 14:26:49 -0400
+Message-Id: <1279132009-26635-1-git-send-email-pjones@redhat.com>
+In-Reply-To: <1279121617-17961-1-git-send-email-pjones@redhat.com>
+References: <1279121617-17961-1-git-send-email-pjones@redhat.com>
+X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21
+
+Disks can have 4kB sectors now, so don't just bail out when that's the
+case.
+---
+ src/include/disk.h | 3 +++
+ src/lib/disk.c | 43 +++++++++++++++++++++++++++++++++----------
+ src/lib/gpt.c | 30 ++++++++++++++----------------
+ 3 files changed, 50 insertions(+), 26 deletions(-)
+
+diff --git a/src/include/disk.h b/src/include/disk.h
+index eb93d10..8aa37d7 100644
+--- a/src/include/disk.h
++++ b/src/include/disk.h
+@@ -65,6 +65,9 @@ enum _interface_type {interface_type_unknown,
+ ata, atapi, scsi, usb,
+ i1394, fibre, i2o, md};
+
++
++unsigned int lcm(unsigned int x, unsigned int y);
++
+ int disk_get_pci(int fd,
+ unsigned char *bus,
+ unsigned char *device,
+diff --git a/src/lib/disk.c b/src/lib/disk.c
+index 883864f..9c3a878 100644
+--- a/src/lib/disk.c
++++ b/src/lib/disk.c
+@@ -420,6 +420,27 @@ get_sector_size(int filedes)
+ return sector_size;
+ }
+
++/************************************************************
++ * lcm
++ * Requires:
++ * - numbers of which to find the lowest common multiple
++ * Modifies: nothing
++ * Returns:
++ * lowest common multiple of x and y
++ ************************************************************/
++unsigned int
++lcm(unsigned int x, unsigned int y)
++{
++ unsigned int m = x, n = y, o;
++
++ while ((o = m % n)) {
++ m = n;
++ n = o;
++ }
++
++ return (x / n) * y;
++}
++
+ /**
+ * disk_get_partition_info()
+ * @fd - open file descriptor to disk
+@@ -442,26 +463,27 @@ disk_get_partition_info (int fd,
+ uint8_t *mbr_type, uint8_t *signature_type)
+ {
+ legacy_mbr *mbr;
+- void *mbr_unaligned;
++ void *mbr_sector;
++ size_t mbr_size;
+ off_t offset;
+ int this_bytes_read = 0;
+ int gpt_invalid=0, mbr_invalid=0;
+ int rc=0;
+ int sector_size = get_sector_size(fd);
+
+- if (sizeof(*mbr) != sector_size)
+- return 1;
+- mbr_unaligned = malloc(sizeof(*mbr)+sector_size-1);
+- mbr = (legacy_mbr *)
+- (((unsigned long)mbr_unaligned + sector_size - 1) &
+- ~(unsigned long)(sector_size-1));
+- memset(mbr, 0, sizeof(*mbr));
++
++ mbr_size = lcm(sizeof(*mbr), sector_size);
++ if ((rc = posix_memalign(&mbr_sector, sector_size, mbr_size)) != 0)
++ goto error;
++ memset(mbr_sector, '\0', mbr_size);
++
+ offset = lseek(fd, 0, SEEK_SET);
+- this_bytes_read = read(fd, mbr, sizeof(*mbr));
++ this_bytes_read = read(fd, mbr_sector, mbr_size);
+ if (this_bytes_read < sizeof(*mbr)) {
+ rc=1;
+ goto error_free_mbr;
+ }
++ mbr = (legacy_mbr *)mbr_sector;
+ gpt_invalid = gpt_disk_get_partition_info(fd, num,
+ start, size,
+ signature,
+@@ -479,7 +501,8 @@ disk_get_partition_info (int fd,
+ }
+ }
+ error_free_mbr:
+- free(mbr_unaligned);
++ free(mbr_sector);
++ error:
+ return rc;
+ }
+
+diff --git a/src/lib/gpt.c b/src/lib/gpt.c
+index d90ddaf..83e7a94 100644
+--- a/src/lib/gpt.c
++++ b/src/lib/gpt.c
+@@ -215,26 +215,24 @@ read_lastoddsector(int fd, uint64_t lba, void *buffer, size_t count)
+ static ssize_t
+ read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
+ {
+- int sector_size = get_sector_size(fd);
+- off_t offset = lba * sector_size;
++ int sector_size = get_sector_size(fd);
++ off_t offset = lba * sector_size;
+ ssize_t bytesread;
+- void *aligned;
+- void *unaligned;
+-
+- if (bytes % sector_size)
+- return EINVAL;
++ void *iobuf;
++ size_t iobuf_size;
++ int rc;
+
+- unaligned = malloc(bytes+sector_size-1);
+- aligned = (void *)
+- (((unsigned long)unaligned + sector_size - 1) &
+- ~(unsigned long)(sector_size-1));
+- memset(aligned, 0, bytes);
++ iobuf_size = lcm(bytes, sector_size);
++ rc = posix_memalign(&iobuf, sector_size, iobuf_size);
++ if (rc)
++ return rc;
++ memset(iobuf, 0, bytes);
+
+
+- lseek(fd, offset, SEEK_SET);
+- bytesread = read(fd, aligned, bytes);
+- memcpy(buffer, aligned, bytesread);
+- free(unaligned);
++ lseek(fd, offset, SEEK_SET);
++ bytesread = read(fd, iobuf, iobuf_size);
++ memcpy(buffer, iobuf, bytes);
++ free(iobuf);
+
+ /* Kludge. This is necessary to read/write the last
+ block of an odd-sized disk, until Linux 2.5.x kernel fixes.
+--
+1.7.1.1
+
|