Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4b86a872561ad052bdc6f092a06807822d26beb1
Commit: 4b86a872561ad052bdc6f092a06807822d26beb1
Parent: dff4982f5cd4e30e2a140a3bca95d8814115bf5b
Author: Paul Clements <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:27:36 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:55 2007 -0700
NBD: set uninitialized devices to size 0
This fixes errors with utilities (such as LVM's vgscan) that try to scan all
devices. Previously this would generate read errors when uninitialized nbd
devices were scanned:
# vgscan
Reading all physical volumes. This may take a while...
/dev/nbd0: read failed after 0 of 1024 at 0: Input/output error
/dev/nbd0: read failed after 0 of 1024 at 509804544: Input/output error
/dev/nbd0: read failed after 0 of 2048 at 0: Input/output error
/dev/nbd1: read failed after 0 of 1024 at 509804544: Input/output error
/dev/nbd1: read failed after 0 of 2048 at 0: Input/output error
From now on, uninitialized nbd devices will have size zero, which
prevents these errors.
Signed-off-by: Paul Clements <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/block/nbd.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index dc88bcf..89bdafd 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -578,6 +578,9 @@ static int nbd_ioctl(struct inode *inode, struct file *file,
printk(KERN_WARNING "%s: queue cleared\n", lo->disk->disk_name);
if (file)
fput(file);
+ lo->bytesize = 0;
+ inode->i_bdev->bd_inode->i_size = 0;
+ set_capacity(lo->disk, 0);
return lo->harderror;
case NBD_CLEAR_QUE:
/*
@@ -655,14 +658,14 @@ static int __init nbd_init(void)
mutex_init(&nbd_dev[i].tx_lock);
init_waitqueue_head(&nbd_dev[i].active_wq);
nbd_dev[i].blksize = 1024;
- nbd_dev[i].bytesize = 0x7ffffc00ULL << 10; /* 2TB */
+ nbd_dev[i].bytesize = 0;
disk->major = NBD_MAJOR;
disk->first_minor = i;
disk->fops = &nbd_fops;
disk->private_data = &nbd_dev[i];
disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
sprintf(disk->disk_name, "nbd%d", i);
- set_capacity(disk, 0x7ffffc00ULL << 1); /* 2 TB */
+ set_capacity(disk, 0);
add_disk(disk);
}
-
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