[PATCH] xfs: send warning of project quota to userspace via netlink

[PATCH] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

Linux's quota subsystem has an ability to handle
project quota. This commit just utilizes the ability
from xfs side.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
---
 fs/xfs/xfs_trans_dquot.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index ce78534..1a46544 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -572,12 +572,17 @@ xfs_quota_warn(
 	struct xfs_dquot	*dqp,
 	int			type)
 {
-	/* no warnings for project quotas - we just return ENOSPC later */
+	enum quota_type t;
+
 	if (dqp->dq_flags & XFS_DQ_PROJ)
-		return;
+		t = PRJQUOTA;
+	else if (dqp->dq_flags & XFS_DQ_USER)
+		t = USRQUOTA;
+	else
+		t = GRPQUOTA;
+
 	quota_send_warning(make_kqid(&init_user_ns,
-				     (dqp->dq_flags & XFS_DQ_USER) ?
-				     USRQUOTA : GRPQUOTA,
+				     t,
 				     be32_to_cpu(dqp->q_core.d_id)),
 			   mp->m_super->s_dev, type);
 }
-- 
2.5.0

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Re: [PATCH] xfs: send warning of project quota to userspace via netlink

[Brian Foster]

On Wed, Nov 25, 2015 at 05:52:41PM +0900, Masatake YAMATO wrote:
> Linux's quota subsystem has an ability to handle
> project quota. This commit just utilizes the ability
> from xfs side.
> 
> Signed-off-by: Masatake YAMATO <yamato@redhat.com>
> ---

Seems reasonable to me. A couple questions... how has this been tested?
The original commit a210c1aa7 ("xfs: implement quota warnings via
netlink") mentions that the xfstests quota tests with something
listening for events was sufficient.

Also, is the userspace support for this new? If so, what is the behavior
if somebody runs a new kernel with this event and an old userspace?

Other than that, just a couple aesthetic things..

>  fs/xfs/xfs_trans_dquot.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
> index ce78534..1a46544 100644
> --- a/fs/xfs/xfs_trans_dquot.c
> +++ b/fs/xfs/xfs_trans_dquot.c
> @@ -572,12 +572,17 @@ xfs_quota_warn(
>  	struct xfs_dquot	*dqp,
>  	int			type)
>  {
> -	/* no warnings for project quotas - we just return ENOSPC later */
> +	enum quota_type t;
> +

The variable name should be lined up with the function parameter names.
I'd prefer a more descriptive variable name as well (e.g., 'qtype'?).

>  	if (dqp->dq_flags & XFS_DQ_PROJ)
> -		return;
> +		t = PRJQUOTA;
> +	else if (dqp->dq_flags & XFS_DQ_USER)
> +		t = USRQUOTA;
> +	else
> +		t = GRPQUOTA;
> +
>  	quota_send_warning(make_kqid(&init_user_ns,
> -				     (dqp->dq_flags & XFS_DQ_USER) ?
> -				     USRQUOTA : GRPQUOTA,
> +				     t,

This could probably get moved to the end of the previous line rather
than it's own separate line now that the conditional is removed. We
generally just want to keep lines within 80 columns.

Brian

>  				     be32_to_cpu(dqp->q_core.d_id)),
>  			   mp->m_super->s_dev, type);
>  }
> -- 
> 2.5.0
> 
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs

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[PATCH v2] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

Linux's quota subsystem has an ability to handle
project quota. This commit just utilizes the ability
from xfs side.

dbus-monitor and quota_nld shipped as part of quota-tools can
be used for testing.

The testing environment and condition:

    # cat /etc/projects
    10:/root/Q/a
    # grep Q /proc/mounts
    /dev/loop0 /root/Q xfs rw,relatime,attr2,inode64,prjquota 0 0
    # ls -l /dev/loop0
    brw-rw---- 1 root disk 7, 0 Nov 26 10:46 /dev/loop0

3 terminals are used for each commands: dd, quota_nld, and dbus-monitor.

Start quota_nld with terminal 1:

	[1]# quota_nld -F

Start dbus-monitor with terminal 2:

        [2]# dbus-monitor --system

Start dd to generate a large file for hitting the quota limit:

        [3]# dd if=/dev/sda of=/root/Q/a/X

At the terminal 1, you will see warning messages like:

   quota_nld: Failed to open tty /dev/tty1 of user 0 to report warning.

Let's ignore them.  These meaningless messages
are suppressed by a patch available at
https://sourceforge.net/p/linuxquota/patches/43/.

At the terminal 2, you will see following traffic about disk quota
(newlines are inserted):

    signal time=1448502680.741715 sender=:1.35 -> \
	   destination=(null destination) serial=4 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 6
       uint32 7
       uint32 0
       uint64 0
    signal time=1448502680.742518 sender=:1.35 -> \
	   destination=(null destination) serial=5 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 4
       uint32 7
       uint32 0
       uint64 0

The 1st "2" means the type of quota: project quota.
The 2nd "10" means the project id.
The 3rd "4" and "6" mean "Block hardlimit reached" and
"Block softlimit reached".
The 4th "7" means the major number of loop0.
The 5th "0" means the minor number of loop0.

Changes in v2:

	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
	* rename local vairable for aligning the parameter names,
	* move a short line to the end of its previous line.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
---
 fs/xfs/xfs_trans_dquot.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index ce78534..9951701 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -572,12 +572,16 @@ xfs_quota_warn(
 	struct xfs_dquot	*dqp,
 	int			type)
 {
-	/* no warnings for project quotas - we just return ENOSPC later */
+	enum quota_type qtype;
+
 	if (dqp->dq_flags & XFS_DQ_PROJ)
-		return;
-	quota_send_warning(make_kqid(&init_user_ns,
-				     (dqp->dq_flags & XFS_DQ_USER) ?
-				     USRQUOTA : GRPQUOTA,
+		qtype = PRJQUOTA;
+	else if (dqp->dq_flags & XFS_DQ_USER)
+		qtype = USRQUOTA;
+	else
+		qtype = GRPQUOTA;
+
+	quota_send_warning(make_kqid(&init_user_ns, qtype,
 				     be32_to_cpu(dqp->q_core.d_id)),
 			   mp->m_super->s_dev, type);
 }
-- 
2.5.0

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[PATCH v2] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

Linux's quota subsystem has an ability to handle
project quota. This commit just utilizes the ability
from xfs side.

dbus-monitor and quota_nld shipped as part of quota-tools can
be used for testing.

The testing environment and condition:

    # cat /etc/projects
    10:/root/Q/a
    # grep Q /proc/mounts
    /dev/loop0 /root/Q xfs rw,relatime,attr2,inode64,prjquota 0 0
    # ls -l /dev/loop0
    brw-rw---- 1 root disk 7, 0 Nov 26 10:46 /dev/loop0

3 terminals are used for each commands: dd, quota_nld, and dbus-monitor.

Start quota_nld with terminal 1:

	[1]# quota_nld -F

Start dbus-monitor with terminal 2:

        [2]# dbus-monitor --system

Start dd to generate a large file for hitting the quota limit:

        [3]# dd if=/dev/sda of=/root/Q/a/X

At the terminal 1, you will see warning messages like:

   quota_nld: Failed to open tty /dev/tty1 of user 0 to report warning.

Let's ignore them.  These meaningless messages
are suppressed by a patch available at
https://sourceforge.net/p/linuxquota/patches/43/.

At the terminal 2, you will see following traffic about disk quota
(newlines are inserted):

    signal time=1448502680.741715 sender=:1.35 -> \
	   destination=(null destination) serial=4 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 6
       uint32 7
       uint32 0
       uint64 0
    signal time=1448502680.742518 sender=:1.35 -> \
	   destination=(null destination) serial=5 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 4
       uint32 7
       uint32 0
       uint64 0

The 1st "2" means the type of quota: project quota.
The 2nd "10" means the project id.
The 3rd "4" and "6" mean "Block hardlimit reached" and
"Block softlimit reached".
The 4th "7" means the major number of loop0.
The 5th "0" means the minor number of loop0.

Changes in v2:

	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
	* rename local vairable for aligning the parameter names,
	* move a short line to the end of its previous line.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
---
 fs/xfs/xfs_trans_dquot.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index ce78534..9951701 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -572,12 +572,16 @@ xfs_quota_warn(
 	struct xfs_dquot	*dqp,
 	int			type)
 {
-	/* no warnings for project quotas - we just return ENOSPC later */
+	enum quota_type qtype;
+
 	if (dqp->dq_flags & XFS_DQ_PROJ)
-		return;
-	quota_send_warning(make_kqid(&init_user_ns,
-				     (dqp->dq_flags & XFS_DQ_USER) ?
-				     USRQUOTA : GRPQUOTA,
+		qtype = PRJQUOTA;
+	else if (dqp->dq_flags & XFS_DQ_USER)
+		qtype = USRQUOTA;
+	else
+		qtype = GRPQUOTA;
+
+	quota_send_warning(make_kqid(&init_user_ns, qtype,
 				     be32_to_cpu(dqp->q_core.d_id)),
 			   mp->m_super->s_dev, type);
 }
-- 
2.5.0

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xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs

[PATCH v2] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

Linux's quota subsystem has an ability to handle
project quota. This commit just utilizes the ability
from xfs side.

dbus-monitor and quota_nld shipped as part of quota-tools can
be used for testing.

The testing environment and condition:

    # cat /etc/projects
    10:/root/Q/a
    # grep Q /proc/mounts
    /dev/loop0 /root/Q xfs rw,relatime,attr2,inode64,prjquota 0 0
    # ls -l /dev/loop0
    brw-rw---- 1 root disk 7, 0 Nov 26 10:46 /dev/loop0

3 terminals are used for each commands: dd, quota_nld, and dbus-monitor.

Start quota_nld with terminal 1:

	[1]# quota_nld -F

Start dbus-monitor with terminal 2:

        [2]# dbus-monitor --system

Start dd to generate a large file for hitting the quota limit:

        [3]# dd if=/dev/sda of=/root/Q/a/X

At the terminal 1, you will see warning messages like:

   quota_nld: Failed to open tty /dev/tty1 of user 0 to report warning.

Let's ignore them.  These meaningless messages
are suppressed by a patch available at
https://sourceforge.net/p/linuxquota/patches/43/.

At the terminal 2, you will see following traffic about disk quota
(newlines are inserted):

    signal time=1448502680.741715 sender=:1.35 -> \
	   destination=(null destination) serial=4 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 6
       uint32 7
       uint32 0
       uint64 0
    signal time=1448502680.742518 sender=:1.35 -> \
	   destination=(null destination) serial=5 path=/; \
	   interface=com.system.quota.warning; member=warning
       uint32 2
       uint64 10
       uint32 4
       uint32 7
       uint32 0
       uint64 0

The 1st "2" means the type of quota: project quota.
The 2nd "10" means the project id.
The 3rd "4" and "6" mean "Block hardlimit reached" and
"Block softlimit reached".
The 4th "7" means the major number of loop0.
The 5th "0" means the minor number of loop0.

Changes in v2:

	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
	* rename local vairable for aligning the parameter names,
	* move a short line to the end of its previous line.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
---
 fs/xfs/xfs_trans_dquot.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index ce78534..9951701 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -572,12 +572,16 @@ xfs_quota_warn(
 	struct xfs_dquot	*dqp,
 	int			type)
 {
-	/* no warnings for project quotas - we just return ENOSPC later */
+	enum quota_type qtype;
+
 	if (dqp->dq_flags & XFS_DQ_PROJ)
-		return;
-	quota_send_warning(make_kqid(&init_user_ns,
-				     (dqp->dq_flags & XFS_DQ_USER) ?
-				     USRQUOTA : GRPQUOTA,
+		qtype = PRJQUOTA;
+	else if (dqp->dq_flags & XFS_DQ_USER)
+		qtype = USRQUOTA;
+	else
+		qtype = GRPQUOTA;
+
+	quota_send_warning(make_kqid(&init_user_ns, qtype,
 				     be32_to_cpu(dqp->q_core.d_id)),
 			   mp->m_super->s_dev, type);
 }
-- 
2.5.0

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Re: [PATCH v2] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

I'm sorry, mistakenly I sent the same message multiple times.
All the same. so please, review the any one of them.

Masatake YAMATO

> Linux's quota subsystem has an ability to handle
> project quota. This commit just utilizes the ability
> from xfs side.
> 
> dbus-monitor and quota_nld shipped as part of quota-tools can
> be used for testing.
> 
> The testing environment and condition:
> 
>     # cat /etc/projects
>     10:/root/Q/a
>     # grep Q /proc/mounts
>     /dev/loop0 /root/Q xfs rw,relatime,attr2,inode64,prjquota 0 0
>     # ls -l /dev/loop0
>     brw-rw---- 1 root disk 7, 0 Nov 26 10:46 /dev/loop0
> 
> 3 terminals are used for each commands: dd, quota_nld, and dbus-monitor.
> 
> Start quota_nld with terminal 1:
> 
> 	[1]# quota_nld -F
> 
> Start dbus-monitor with terminal 2:
> 
>         [2]# dbus-monitor --system
> 
> Start dd to generate a large file for hitting the quota limit:
> 
>         [3]# dd if=/dev/sda of=/root/Q/a/X
> 
> At the terminal 1, you will see warning messages like:
> 
>    quota_nld: Failed to open tty /dev/tty1 of user 0 to report warning.
> 
> Let's ignore them.  These meaningless messages
> are suppressed by a patch available at
> https://sourceforge.net/p/linuxquota/patches/43/.
> 
> At the terminal 2, you will see following traffic about disk quota
> (newlines are inserted):
> 
>     signal time=1448502680.741715 sender=:1.35 -> \
> 	   destination=(null destination) serial=4 path=/; \
> 	   interface=com.system.quota.warning; member=warning
>        uint32 2
>        uint64 10
>        uint32 6
>        uint32 7
>        uint32 0
>        uint64 0
>     signal time=1448502680.742518 sender=:1.35 -> \
> 	   destination=(null destination) serial=5 path=/; \
> 	   interface=com.system.quota.warning; member=warning
>        uint32 2
>        uint64 10
>        uint32 4
>        uint32 7
>        uint32 0
>        uint64 0
> 
> The 1st "2" means the type of quota: project quota.
> The 2nd "10" means the project id.
> The 3rd "4" and "6" mean "Block hardlimit reached" and
> "Block softlimit reached".
> The 4th "7" means the major number of loop0.
> The 5th "0" means the minor number of loop0.
> 
> Changes in v2:
> 
> 	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
> 	* rename local vairable for aligning the parameter names,
> 	* move a short line to the end of its previous line.
> 
> Signed-off-by: Masatake YAMATO <yamato@redhat.com>
> ---
>  fs/xfs/xfs_trans_dquot.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
> index ce78534..9951701 100644
> --- a/fs/xfs/xfs_trans_dquot.c
> +++ b/fs/xfs/xfs_trans_dquot.c
> @@ -572,12 +572,16 @@ xfs_quota_warn(
>  	struct xfs_dquot	*dqp,
>  	int			type)
>  {
> -	/* no warnings for project quotas - we just return ENOSPC later */
> +	enum quota_type qtype;
> +
>  	if (dqp->dq_flags & XFS_DQ_PROJ)
> -		return;
> -	quota_send_warning(make_kqid(&init_user_ns,
> -				     (dqp->dq_flags & XFS_DQ_USER) ?
> -				     USRQUOTA : GRPQUOTA,
> +		qtype = PRJQUOTA;
> +	else if (dqp->dq_flags & XFS_DQ_USER)
> +		qtype = USRQUOTA;
> +	else
> +		qtype = GRPQUOTA;
> +
> +	quota_send_warning(make_kqid(&init_user_ns, qtype,
>  				     be32_to_cpu(dqp->q_core.d_id)),
>  			   mp->m_super->s_dev, type);
>  }
> -- 
> 2.5.0
> 

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Re: [PATCH v2] xfs: send warning of project quota to userspace via netlink

[Brian Foster]

On Thu, Nov 26, 2015 at 11:22:39AM +0900, Masatake YAMATO wrote:
> Linux's quota subsystem has an ability to handle
> project quota. This commit just utilizes the ability
> from xfs side.
> 
...
> Changes in v2:
> 
> 	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
> 	* rename local vairable for aligning the parameter names,
> 	* move a short line to the end of its previous line.
> 
> Signed-off-by: Masatake YAMATO <yamato@redhat.com>
> ---

Thanks for all of the test information. Now you have a really long
commit log description rather than a short one. ;) Maybe Dave can
truncate it. Regardless, looks fine to me:

Reviewed-by: Brian Foster <bfoster@redhat.com>

>  fs/xfs/xfs_trans_dquot.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
> index ce78534..9951701 100644
> --- a/fs/xfs/xfs_trans_dquot.c
> +++ b/fs/xfs/xfs_trans_dquot.c
> @@ -572,12 +572,16 @@ xfs_quota_warn(
>  	struct xfs_dquot	*dqp,
>  	int			type)
>  {
> -	/* no warnings for project quotas - we just return ENOSPC later */
> +	enum quota_type qtype;
> +
>  	if (dqp->dq_flags & XFS_DQ_PROJ)
> -		return;
> -	quota_send_warning(make_kqid(&init_user_ns,
> -				     (dqp->dq_flags & XFS_DQ_USER) ?
> -				     USRQUOTA : GRPQUOTA,
> +		qtype = PRJQUOTA;
> +	else if (dqp->dq_flags & XFS_DQ_USER)
> +		qtype = USRQUOTA;
> +	else
> +		qtype = GRPQUOTA;
> +
> +	quota_send_warning(make_kqid(&init_user_ns, qtype,
>  				     be32_to_cpu(dqp->q_core.d_id)),
>  			   mp->m_super->s_dev, type);
>  }
> -- 
> 2.5.0
> 
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs

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Re: [PATCH v2] xfs: send warning of project quota to userspace via netlink

[Masatake YAMATO]

On Thu, 26 Nov 2015 08:49:33 -0500, Brian Foster <bfoster@redhat.com> wrote:
> On Thu, Nov 26, 2015 at 11:22:39AM +0900, Masatake YAMATO wrote:
>> Linux's quota subsystem has an ability to handle
>> project quota. This commit just utilizes the ability
>> from xfs side.
>> 
> ...
>> Changes in v2:
>> 
>> 	a couple aesthetic things suggested by Brian Foster <bfoster@redhat.com>.
>> 	* rename local vairable for aligning the parameter names,
>> 	* move a short line to the end of its previous line.
>> 
>> Signed-off-by: Masatake YAMATO <yamato@redhat.com>
>> ---
> 
> Thanks for all of the test information. Now you have a really long
> commit log description rather than a short one. ;) Maybe Dave can
> truncate it. Regardless, looks fine to me:
> 
> Reviewed-by: Brian Foster <bfoster@redhat.com>

Any progress?

The patch for userland is merged today:
https://sourceforge.net/p/linuxquota/patches/43/

Masatake YAMATO

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