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authorSuzuki K P <suzuki@in.ibm.com>2006-12-06 20:35:16 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:30 -0800
commit57881dd9df40b76dc7fc6a0d13fd75f337accb32 (patch)
tree088010827c14fbe75628c64848839616175bb9d6
parent5127d002f9769ba6b1691de78dd3a5c14635e183 (diff)
[PATCH] Fix check_partition routines
check_partition() stops its probe once it hits an I/O error from the partition checkers. This would prevent the actual partition checker getting a chance to verify the partition. So this patch lets check_partition() continue probing untill it hits a success while recording the I/O error which might have been reported by the checking routines. Also, it does some cleanup of the partition methods for ibm, atari and amiga to return -1 upon hitting an I/O error. Signed-off-by: Suzuki K P <suzuki@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/partitions/amiga.c2
-rw-r--r--fs/partitions/atari.c2
-rw-r--r--fs/partitions/check.c15
-rw-r--r--fs/partitions/ibm.c29
4 files changed, 33 insertions, 15 deletions
diff --git a/fs/partitions/amiga.c b/fs/partitions/amiga.c
index 3068528890a..9917a8c360f 100644
--- a/fs/partitions/amiga.c
+++ b/fs/partitions/amiga.c
@@ -43,6 +43,7 @@ amiga_partition(struct parsed_partitions *state, struct block_device *bdev)
if (warn_no_part)
printk("Dev %s: unable to read RDB block %d\n",
bdevname(bdev, b), blk);
+ res = -1;
goto rdb_done;
}
if (*(__be32 *)data != cpu_to_be32(IDNAME_RIGIDDISK))
@@ -79,6 +80,7 @@ amiga_partition(struct parsed_partitions *state, struct block_device *bdev)
if (warn_no_part)
printk("Dev %s: unable to read partition block %d\n",
bdevname(bdev, b), blk);
+ res = -1;
goto rdb_done;
}
pb = (struct PartitionBlock *)data;
diff --git a/fs/partitions/atari.c b/fs/partitions/atari.c
index 192a6adfdef..1f3572d5b75 100644
--- a/fs/partitions/atari.c
+++ b/fs/partitions/atari.c
@@ -88,7 +88,7 @@ int atari_partition(struct parsed_partitions *state, struct block_device *bdev)
if (!xrs) {
printk (" block %ld read failed\n", partsect);
put_dev_sector(sect);
- return 0;
+ return -1;
}
/* ++roman: sanity check: bit 0 of flg field must be set */
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 0b6113ba3b7..1901137f4ec 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -153,7 +153,7 @@ static struct parsed_partitions *
check_partition(struct gendisk *hd, struct block_device *bdev)
{
struct parsed_partitions *state;
- int i, res;
+ int i, res, err;
state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL);
if (!state)
@@ -165,13 +165,24 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
sprintf(state->name, "p");
state->limit = hd->minors;
- i = res = 0;
+ i = res = err = 0;
while (!res && check_part[i]) {
memset(&state->parts, 0, sizeof(state->parts));
res = check_part[i++](state, bdev);
+ if (res < 0) {
+ /* We have hit an I/O error which we don't report now.
+ * But record it, and let the others do their job.
+ */
+ err = res;
+ res = 0;
+ }
+
}
if (res > 0)
return state;
+ if (!err)
+ /* The partition is unrecognized. So report I/O errors if there were any */
+ res = err;
if (!res)
printk(" unknown partition table\n");
else if (warn_no_part)
diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index d352a7381fe..9f7ad4244f6 100644
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -43,7 +43,7 @@ cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
int
ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
{
- int blocksize, offset, size;
+ int blocksize, offset, size,res;
loff_t i_size;
dasd_information_t *info;
struct hd_geometry *geo;
@@ -56,15 +56,16 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
unsigned char *data;
Sector sect;
+ res = 0;
blocksize = bdev_hardsect_size(bdev);
if (blocksize <= 0)
- return 0;
+ goto out_exit;
i_size = i_size_read(bdev->bd_inode);
if (i_size == 0)
- return 0;
+ goto out_exit;
if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL)
- goto out_noinfo;
+ goto out_exit;
if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL)
goto out_nogeo;
if ((label = kmalloc(sizeof(union label_t), GFP_KERNEL)) == NULL)
@@ -72,7 +73,7 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 ||
ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
- goto out_noioctl;
+ goto out_freeall;
/*
* Get volume label, extract name and type.
@@ -92,6 +93,8 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
EBCASC(type, 4);
EBCASC(name, 6);
+ res = 1;
+
/*
* Three different types: CMS1, VOL1 and LNX1/unlabeled
*/
@@ -156,6 +159,9 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
counter++;
blk++;
}
+ if (!data)
+ /* Are we not supposed to report this ? */
+ goto out_readerr;
} else {
/*
* Old style LNX1 or unlabeled disk
@@ -171,18 +177,17 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
}
printk("\n");
- kfree(label);
- kfree(geo);
- kfree(info);
- return 1;
+ goto out_freeall;
+
out_readerr:
-out_noioctl:
+ res = -1;
+out_freeall:
kfree(label);
out_nolab:
kfree(geo);
out_nogeo:
kfree(info);
-out_noinfo:
- return 0;
+out_exit:
+ return res;
}