* [PATCH] ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
@ 2014-10-02 7:50 Dmitry Monakhov
2014-10-02 11:40 ` Jan Kara
0 siblings, 1 reply; 3+ messages in thread
From: Dmitry Monakhov @ 2014-10-02 7:50 UTC (permalink / raw)
To: linux-ext4; +Cc: Dmitry Monakhov
Otherwise this provokes complain like follows:
WARNING: CPU: 12 PID: 5795 at fs/ext4/ext4_jbd2.c:48 ext4_journal_check_start+0x4e/0xa0()
Modules linked in: brd iTCO_wdt lpc_ich mfd_core igb ptp dm_mirror dm_region_hash dm_log dm_mod
CPU: 12 PID: 5795 Comm: python Not tainted 3.17.0-rc2-00175-gae5344f #158
Hardware name: Intel Corporation W2600CR/W2600CR, BIOS SE5C600.86B.99.99.x028.061320111235 06/13/2011
0000000000000030 ffff8808116cfd28 ffffffff815c7dfc 0000000000000030
0000000000000000 ffff8808116cfd68 ffffffff8106ce8c ffff8808116cfdc8
ffff880813b16000 ffff880806ad6ae8 ffffffff81202008 0000000000000000
Call Trace:
[<ffffffff815c7dfc>] dump_stack+0x51/0x6d
[<ffffffff8106ce8c>] warn_slowpath_common+0x8c/0xc0
[<ffffffff81202008>] ? ext4_ioctl+0x9e8/0xeb0
[<ffffffff8106ceda>] warn_slowpath_null+0x1a/0x20
[<ffffffff8122867e>] ext4_journal_check_start+0x4e/0xa0
[<ffffffff81228c10>] __ext4_journal_start_sb+0x90/0x110
[<ffffffff81202008>] ext4_ioctl+0x9e8/0xeb0
[<ffffffff8107b0bd>] ? ptrace_stop+0x24d/0x2f0
[<ffffffff81088530>] ? alloc_pid+0x480/0x480
[<ffffffff8107b1f2>] ? ptrace_do_notify+0x92/0xb0
[<ffffffff81186545>] do_vfs_ioctl+0x4e5/0x550
[<ffffffff815cdbcb>] ? _raw_spin_unlock_irq+0x2b/0x40
[<ffffffff81186603>] SyS_ioctl+0x53/0x80
[<ffffffff815ce2ce>] tracesys+0xd0/0xd5
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
fs/ext4/ioctl.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 0f2252e..3d5de16 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -532,9 +532,17 @@ group_add_out:
}
case EXT4_IOC_SWAP_BOOT:
+ {
+ int err;
if (!(filp->f_mode & FMODE_WRITE))
return -EBADF;
- return swap_inode_boot_loader(sb, inode);
+ err = mnt_want_write_file(filp);
+ if (err)
+ return err;
+ err = swap_inode_boot_loader(sb, inode);
+ mnt_drop_write_file(filp);
+ return err;
+ }
case EXT4_IOC_RESIZE_FS: {
ext4_fsblk_t n_blocks_count;
--
1.7.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
2014-10-02 7:50 [PATCH] ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT Dmitry Monakhov
@ 2014-10-02 11:40 ` Jan Kara
2014-10-03 16:50 ` Theodore Ts'o
0 siblings, 1 reply; 3+ messages in thread
From: Jan Kara @ 2014-10-02 11:40 UTC (permalink / raw)
To: Dmitry Monakhov; +Cc: linux-ext4
On Thu 02-10-14 11:50:02, Dmitry Monakhov wrote:
> Otherwise this provokes complain like follows:
> WARNING: CPU: 12 PID: 5795 at fs/ext4/ext4_jbd2.c:48 ext4_journal_check_start+0x4e/0xa0()
> Modules linked in: brd iTCO_wdt lpc_ich mfd_core igb ptp dm_mirror dm_region_hash dm_log dm_mod
> CPU: 12 PID: 5795 Comm: python Not tainted 3.17.0-rc2-00175-gae5344f #158
> Hardware name: Intel Corporation W2600CR/W2600CR, BIOS SE5C600.86B.99.99.x028.061320111235 06/13/2011
> 0000000000000030 ffff8808116cfd28 ffffffff815c7dfc 0000000000000030
> 0000000000000000 ffff8808116cfd68 ffffffff8106ce8c ffff8808116cfdc8
> ffff880813b16000 ffff880806ad6ae8 ffffffff81202008 0000000000000000
> Call Trace:
> [<ffffffff815c7dfc>] dump_stack+0x51/0x6d
> [<ffffffff8106ce8c>] warn_slowpath_common+0x8c/0xc0
> [<ffffffff81202008>] ? ext4_ioctl+0x9e8/0xeb0
> [<ffffffff8106ceda>] warn_slowpath_null+0x1a/0x20
> [<ffffffff8122867e>] ext4_journal_check_start+0x4e/0xa0
> [<ffffffff81228c10>] __ext4_journal_start_sb+0x90/0x110
> [<ffffffff81202008>] ext4_ioctl+0x9e8/0xeb0
> [<ffffffff8107b0bd>] ? ptrace_stop+0x24d/0x2f0
> [<ffffffff81088530>] ? alloc_pid+0x480/0x480
> [<ffffffff8107b1f2>] ? ptrace_do_notify+0x92/0xb0
> [<ffffffff81186545>] do_vfs_ioctl+0x4e5/0x550
> [<ffffffff815cdbcb>] ? _raw_spin_unlock_irq+0x2b/0x40
> [<ffffffff81186603>] SyS_ioctl+0x53/0x80
> [<ffffffff815ce2ce>] tracesys+0xd0/0xd5
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Ah, good spotting. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> fs/ext4/ioctl.c | 10 +++++++++-
> 1 files changed, 9 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
> index 0f2252e..3d5de16 100644
> --- a/fs/ext4/ioctl.c
> +++ b/fs/ext4/ioctl.c
> @@ -532,9 +532,17 @@ group_add_out:
> }
>
> case EXT4_IOC_SWAP_BOOT:
> + {
> + int err;
> if (!(filp->f_mode & FMODE_WRITE))
> return -EBADF;
> - return swap_inode_boot_loader(sb, inode);
> + err = mnt_want_write_file(filp);
> + if (err)
> + return err;
> + err = swap_inode_boot_loader(sb, inode);
> + mnt_drop_write_file(filp);
> + return err;
> + }
>
> case EXT4_IOC_RESIZE_FS: {
> ext4_fsblk_t n_blocks_count;
> --
> 1.7.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
2014-10-02 11:40 ` Jan Kara
@ 2014-10-03 16:50 ` Theodore Ts'o
0 siblings, 0 replies; 3+ messages in thread
From: Theodore Ts'o @ 2014-10-03 16:50 UTC (permalink / raw)
To: Jan Kara; +Cc: Dmitry Monakhov, linux-ext4
On Thu, Oct 02, 2014 at 01:40:51PM +0200, Jan Kara wrote:
> On Thu 02-10-14 11:50:02, Dmitry Monakhov wrote:
> > Otherwise this provokes complain like follows:
> > WARNING: CPU: 12 PID: 5795 at fs/ext4/ext4_jbd2.c:48 ext4_journal_check_start+0x4e/0xa0()
> > Modules linked in: brd iTCO_wdt lpc_ich mfd_core igb ptp dm_mirror dm_region_hash dm_log dm_mod
> > CPU: 12 PID: 5795 Comm: python Not tainted 3.17.0-rc2-00175-gae5344f #158
> > Hardware name: Intel Corporation W2600CR/W2600CR, BIOS SE5C600.86B.99.99.x028.061320111235 06/13/2011
> > 0000000000000030 ffff8808116cfd28 ffffffff815c7dfc 0000000000000030
> > 0000000000000000 ffff8808116cfd68 ffffffff8106ce8c ffff8808116cfdc8
> > ffff880813b16000 ffff880806ad6ae8 ffffffff81202008 0000000000000000
> > Call Trace:
> > [<ffffffff815c7dfc>] dump_stack+0x51/0x6d
> > [<ffffffff8106ce8c>] warn_slowpath_common+0x8c/0xc0
> > [<ffffffff81202008>] ? ext4_ioctl+0x9e8/0xeb0
> > [<ffffffff8106ceda>] warn_slowpath_null+0x1a/0x20
> > [<ffffffff8122867e>] ext4_journal_check_start+0x4e/0xa0
> > [<ffffffff81228c10>] __ext4_journal_start_sb+0x90/0x110
> > [<ffffffff81202008>] ext4_ioctl+0x9e8/0xeb0
> > [<ffffffff8107b0bd>] ? ptrace_stop+0x24d/0x2f0
> > [<ffffffff81088530>] ? alloc_pid+0x480/0x480
> > [<ffffffff8107b1f2>] ? ptrace_do_notify+0x92/0xb0
> > [<ffffffff81186545>] do_vfs_ioctl+0x4e5/0x550
> > [<ffffffff815cdbcb>] ? _raw_spin_unlock_irq+0x2b/0x40
> > [<ffffffff81186603>] SyS_ioctl+0x53/0x80
> > [<ffffffff815ce2ce>] tracesys+0xd0/0xd5
> >
> > Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
> Ah, good spotting. You can add:
> Reviewed-by: Jan Kara <jack@suse.cz>
Thanks, applied.
- Ted
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-10-02 7:50 [PATCH] ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT Dmitry Monakhov
2014-10-02 11:40 ` Jan Kara
2014-10-03 16:50 ` Theodore Ts'o
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