Bug 622089 - Mount incorrectly passes "quiet" *fat mount option
Summary: Mount incorrectly passes "quiet" *fat mount option
Alias: None
Product: Fedora
Classification: Fedora
Component: util-linux-ng
Version: 14
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Karel Zak
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-08-07 07:51 UTC by Artem S. Tashkinov
Modified: 2012-01-10 15:01 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-01-10 15:01:21 UTC

Attachments (Terms of Use)
2.6.35 .config (59.03 KB, text/plain)
2010-08-07 18:52 UTC, Artem S. Tashkinov
no flags Details

System ID Priority Status Summary Last Updated
Linux Kernel 16500 None None None Never

Description Artem S. Tashkinov 2010-08-07 07:51:11 UTC
Description of problem: "quiet" mount option is incorrectly passed to the kernel

Version-Release number of selected component (if applicable): util-linux-ng-2.17.2-7.fc13.i686, vanilla Linux kernel 2.6.33, 34, 35

How reproducible: always

Steps to Reproduce:
1. mount -t vfat -o quiet device location
Actual results: no "quiet" in /proc/mounts

Expected results: "quiet" option enforced

Additional info: See bug 16500 at kernel's bugzilla

Comment 1 Karel Zak 2010-08-07 18:43:22 UTC
I cannot reproduce this problem with the latest util-linux-ng:

# strace -e mount mount -t vfat -o quiet /dev/loop0 /mnt/test
mount("/dev/loop0", "/mnt/test", "vfat", MS_MGC_VAL, "quiet") = 0

# grep test /proc/mounts
/dev/loop0 /mnt/test vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=ascii,shortname=mixed,quiet,errors=remount-ro 0 0

# uname -a
Linux nb.net.home 2.6.34-11.fc14.x86_64 #1 SMP Sat May 22 01:03:52 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux

Please, try to use:

    # strace -e mount mount -t vfat -o quiet <source> <target>
    # mount -v -v -v -t vfat -o quiet <source> <target>

to get more details.

Comment 2 Artem S. Tashkinov 2010-08-07 18:52:29 UTC
Created attachment 437365 [details]
2.6.35 .config

I'm using *vanilla* 2.6.35 kernel.

[root@localhost tmp]# mount -v -v -v -t vfat -o quiet,loop img /mnt/loop
mount: fstab path: "/etc/fstab"
mount: mtab path:  "/etc/mtab"
mount: lock path:  "/etc/mtab~"
mount: temp path:  "/etc/mtab.tmp"
mount: UID:        0
mount: eUID:       0
mount: spec:  "/tmp/img"
mount: node:  "/mnt/loop"
mount: types: "vfat"
mount: opts:  "quiet,loop"
mount: going to use the loop device /dev/loop0
set_loop(/dev/loop0,/tmp/img,0,0): success
mount: setup loop device successfully
mount: mount(2) syscall: source: "/dev/loop0", target: "/mnt/loop", filesystemtype: "vfat", mountflags: -1058177024, data: (null)
/tmp/img on /mnt/loop type vfat (rw,quiet,loop=/dev/loop0)

[root@localhost tmp]# grep loop /proc/mounts
/dev/loop0 /mnt/loop vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp866,iocharset=utf8,shortname=mixed,errors=remount-ro 0 0

[root@localhost tmp]# strace -e mount mount -t vfat -o quiet,loop img /mnt/loop
mount("/dev/loop0", "/mnt/loop", "vfat", MS_MGC_VAL|MS_SILENT, NULL) = 0


Comment 3 Karel Zak 2010-08-07 23:10:23 UTC
Ah, I found the problem. 

The "quiet" mount option is translated to the MS_SILENT mount flags. Unfortunately, MS_SILENT is undefined in mount private header files (it still uses obsolete MS_VERBOSE). In your system the MS_SILENT macro is probably defined in /usr/include/sys/mount.h so the code that translate the "quiet" options is enabled. 

The another problem is that mount(8) uses the "quiet" for MS_SILENT mount flag and the same option (as string) is expected by vfat kernel driver... that's mess. I need to ask VFS hackers for more details.

Anyway, thanks.

Comment 4 Artem S. Tashkinov 2010-11-26 12:54:30 UTC
Any updates on this bug?

Comment 5 Artem S. Tashkinov 2011-03-01 12:54:38 UTC
Six months and no updates. :(

And the bug is still there.

Comment 6 Karel Zak 2011-03-02 11:46:31 UTC
Sorry, for the delay. I'm going to resolve the problem ASAP.

Comment 7 Karel Zak 2011-03-11 16:02:55 UTC
Fixed in upstream tree, commit 2ac1890aa0d8ce404528587134fcabe0e2834963. I'll add the bugfix to Fedora-15.

Comment 8 Bug Zapper 2011-06-01 11:57:30 UTC
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