From: Milan Broz <mbroz@redhat.com>
To: device-mapper development <dm-devel@redhat.com>
Cc: Tejun Heo <tj@kernel.org>, Jens Axboe <axboe@kernel.dk>,
Tao Ma <tm@tao.ma>,
linux-kernel@vger.kernel.org
Subject: [PATCH] Return EROFS if read-only detected on block device
Date: Tue, 15 Feb 2011 16:16:23 +0100 [thread overview]
Message-ID: <4D5A98C7.3070803@redhat.com> (raw)
In-Reply-To: <4D5A6EF4.3030905@redhat.com>
This allows userspace to distinguish what is going on.
EACCES is returned when user lacks required capability,
not that device is read-only.
Signed-off-by: Milan Broz <mbroz@redhat.com>
---
fs/block_dev.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index c9cf9f7..db2c8db 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1219,7 +1219,7 @@ int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)
/* __blkdev_get() may alter read only status, check it afterwards */
if (!res && (mode & FMODE_WRITE) && bdev_read_only(bdev)) {
__blkdev_put(bdev, mode, 0);
- res = -EACCES;
+ res = -EROFS;
}
if (whole) {
next prev parent reply other threads:[~2011-02-15 15:16 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-13 2:02 block device read-only handling regression in 2.6.38-rc4 (bisected) Milan Broz
2011-02-13 10:58 ` [PATCH] loop: clear read-only flag in loop_clr_fd Tao Ma
2011-02-13 14:11 ` Milan Broz
2011-02-13 15:05 ` Tao Ma
2011-02-13 16:44 ` Milan Broz
2011-02-14 10:30 ` Tejun Heo
2011-02-14 11:47 ` Milan Broz
2011-02-14 13:14 ` [PATCH][RFC] dm: Do not open log and cow device read-write for read-only mappings Milan Broz
2011-02-14 14:09 ` Tejun Heo
2011-02-14 14:23 ` Milan Broz
2011-02-14 15:44 ` Tejun Heo
2011-02-14 23:15 ` NeilBrown
2011-02-15 2:03 ` [dm-devel] " Alasdair G Kergon
2011-02-15 12:17 ` Milan Broz
2011-02-15 12:46 ` Alasdair G Kergon
2011-02-15 15:20 ` Tejun Heo
2011-02-15 15:46 ` Alasdair G Kergon
2011-02-15 15:50 ` Tejun Heo
2011-02-15 16:05 ` Milan Broz
2011-02-15 16:12 ` Tejun Heo
2011-02-15 16:36 ` Milan Broz
2011-02-15 16:41 ` Tejun Heo
2011-02-15 16:56 ` Alasdair G Kergon
2011-02-16 8:46 ` Tejun Heo
2011-02-16 8:46 ` Tejun Heo
2011-02-15 16:58 ` Milan Broz
2011-02-16 8:39 ` Tejun Heo
2011-02-15 15:16 ` Milan Broz [this message]
2011-02-14 14:39 ` Alasdair G Kergon
2011-02-14 14:07 ` [PATCH] loop: clear read-only flag in loop_clr_fd Tejun Heo
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