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| author | Jiri Kosina <jkosina@suse.cz> | 2014-01-10 05:08:13 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-01-17 14:12:06 +0400 |
| commit | 7b7b68bba5ef23734c35ffb0d8d82079ed604d33 (patch) | |
| tree | d6ce0b6d4b7b4cecf42efa3a227b0d6ed29e12b7 /include/uapi/linux/fd.h | |
| parent | 8586ea96b4f919a9b38929040bc9ce57c9998fc4 (diff) | |
| download | linux-7b7b68bba5ef23734c35ffb0d8d82079ed604d33.tar.xz | |
floppy: bail out in open() if drive is not responding to block0 read
In case reading of block 0 during open() fails, it is not the right thing
to let open() succeed.
Fix this by introducing FD_OPEN_SHOULD_FAIL_BIT flag, and setting it in
case the bio callback encounters an error while trying to read block 0.
As a bonus, this works around certain broken userspace (blkid), which is
not able to properly handle read()s returning IO errors. Hence be nice to
those, and bail out during open() already; if block 0 is not readable,
read()s are not going to provide any meaningful data anyway.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/uapi/linux/fd.h')
| -rw-r--r-- | include/uapi/linux/fd.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/fd.h b/include/uapi/linux/fd.h index f1f3dd5981b2..84c517cbce90 100644 --- a/include/uapi/linux/fd.h +++ b/include/uapi/linux/fd.h @@ -185,7 +185,8 @@ enum { * to clear media change status */ FD_UNUSED_BIT, FD_DISK_CHANGED_BIT, /* disk has been changed since last i/o */ - FD_DISK_WRITABLE_BIT /* disk is writable */ + FD_DISK_WRITABLE_BIT, /* disk is writable */ + FD_OPEN_SHOULD_FAIL_BIT }; #define FDSETDRVPRM _IOW(2, 0x90, struct floppy_drive_params) |