* [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0
@ 2009-11-22 13:13 Michael Brandt
2009-11-25 2:53 ` Dan Christensen
2009-12-04 23:46 ` Wolfgang Denk
0 siblings, 2 replies; 3+ messages in thread
From: Michael Brandt @ 2009-11-22 13:13 UTC (permalink / raw)
To: u-boot
From: Michael Brandt <Michael.Brandt@emsyso.de>
extfs.c assumes that there is always a valid inode_size field in the
superblock. But this is not true for ext2fs rev 0. Such ext2fs images are for
instance generated by genext2fs. Symptoms on ARM machines are messages like:
"raise: Signal # 8 caught"
This fix checks for rev 0 and uses then 128 bytes as inode size.
Signed-off-by: Michael Brandt <Michael.Brandt@emsyso.de>
---
fs/ext2/ext2fs.c | 20 +++++++++++++-------
1 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c
index d54f60b..4b391d6 100644
--- a/fs/ext2/ext2fs.c
+++ b/fs/ext2/ext2fs.c
@@ -178,6 +178,7 @@ int indir1_blkno = -1;
uint32_t *indir2_block = NULL;
int indir2_size = 0;
int indir2_blkno = -1;
+static unsigned int inode_size;
static int ext2fs_blockgroup
@@ -212,7 +213,7 @@ static int ext2fs_read_inode
unsigned int blkoff;
#ifdef DEBUG
- printf ("ext2fs read inode %d\n", ino);
+ printf ("ext2fs read inode %d, inode_size %d\n", ino, inode_size);
#endif
/* It is easier to calculate if the first inode is 0. */
ino--;
@@ -222,16 +223,12 @@ static int ext2fs_read_inode
return (0);
}
- inodes_per_block = EXT2_BLOCK_SIZE(data) / __le16_to_cpu(sblock->inode_size);
-
-#ifdef DEBUG
- printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
-#endif
+ inodes_per_block = EXT2_BLOCK_SIZE(data) / inode_size;
blkno = __le32_to_cpu (blkgrp.inode_table_id) +
(ino % __le32_to_cpu (sblock->inodes_per_group))
/ inodes_per_block;
- blkoff = (ino % inodes_per_block) * __le16_to_cpu (sblock->inode_size);
+ blkoff = (ino % inodes_per_block) * inode_size;
#ifdef DEBUG
printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff);
#endif
@@ -863,6 +860,15 @@ int ext2fs_mount (unsigned part_length) {
if (__le16_to_cpu (data->sblock.magic) != EXT2_MAGIC) {
goto fail;
}
+ if (__le32_to_cpu(data->sblock.revision_level == 0)) {
+ inode_size = 128;
+ } else {
+ inode_size = __le16_to_cpu(data->sblock.inode_size);
+ }
+#ifdef DEBUG
+ printf("EXT2 rev %d, inode_size %d\n",
+ __le32_to_cpu(data->sblock.revision_level), inode_size);
+#endif
data->diropen.data = data;
data->diropen.ino = 2;
data->diropen.inode_read = 1;
--
1.6.2.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0
2009-11-22 13:13 [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0 Michael Brandt
@ 2009-11-25 2:53 ` Dan Christensen
2009-12-04 23:46 ` Wolfgang Denk
1 sibling, 0 replies; 3+ messages in thread
From: Dan Christensen @ 2009-11-25 2:53 UTC (permalink / raw)
To: u-boot
I tested this patch and it resolved the problems I was having with
EXT2 filesystems on my SD card.
On Sun, Nov 22, 2009 at 7:13 AM, Michael Brandt
<Michael.Brandt@emsyso.de> wrote:
> From: Michael Brandt <Michael.Brandt@emsyso.de>
>
> extfs.c assumes that there is always a valid inode_size field in the
> superblock. But this is not true for ext2fs rev 0. Such ext2fs images are for
> instance generated by genext2fs. Symptoms on ARM machines are messages like:
> "raise: Signal # 8 caught"
> This fix checks for rev 0 and uses then 128 bytes as inode size.
>
> Signed-off-by: Michael Brandt <Michael.Brandt@emsyso.de>
Thanks!
Dan
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0
2009-11-22 13:13 [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0 Michael Brandt
2009-11-25 2:53 ` Dan Christensen
@ 2009-12-04 23:46 ` Wolfgang Denk
1 sibling, 0 replies; 3+ messages in thread
From: Wolfgang Denk @ 2009-12-04 23:46 UTC (permalink / raw)
To: u-boot
Dear Michael Brandt,
In message <4B0938F7.8080402@emsyso.de> you wrote:
> From: Michael Brandt <Michael.Brandt@emsyso.de>
>
> extfs.c assumes that there is always a valid inode_size field in the
> superblock. But this is not true for ext2fs rev 0. Such ext2fs images are for
> instance generated by genext2fs. Symptoms on ARM machines are messages like:
> "raise: Signal # 8 caught"
> This fix checks for rev 0 and uses then 128 bytes as inode size.
>
> Signed-off-by: Michael Brandt <Michael.Brandt@emsyso.de>
> ---
> fs/ext2/ext2fs.c | 20 +++++++++++++-------
> 1 files changed, 13 insertions(+), 7 deletions(-)
Tested on TQM5200S.
Applied to "master", thanks.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
After a time, you may find that "having" is not so pleasing a thing,
after all, as "wanting." It is not logical, but it is often true.
-- Spock, "Amok Time", stardate 3372.7
^ permalink raw reply [flat|nested] 3+ messages in thread
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2009-11-22 13:13 [U-Boot] [PATCH] EXT2FS: fix inode size for ext2fs rev#0 Michael Brandt
2009-11-25 2:53 ` Dan Christensen
2009-12-04 23:46 ` Wolfgang Denk
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