Patchwork [#upstream] libata: export local port number through /sys

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Submitter David Milburn
Date Jan. 24, 2013, 5:52 p.m.
Message ID <1359049929-17069-1-git-send-email-dmilburn@redhat.com>
Download mbox | patch
Permalink /patch/215457/
State Not Applicable
Delegated to: David Miller
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Comments

David Milburn - Jan. 24, 2013, 5:52 p.m.
Export <global port>.<local port> format through /sys

./pci0000:00/0000:00:1f.2/ata1.1
./pci0000:00/0000:00:1f.2/ata1.1/link1.1/dev1.1.0/ata_device
./pci0000:00/0000:00:1f.2/ata1.1/link1.1/ata_link
./pci0000:00/0000:00:1f.2/ata1.1/ata_port
./pci0000:00/0000:00:1f.2/ata1.1/ata_port/ata1.1
./pci0000:00/0000:00:1f.2/ata2.2
./pci0000:00/0000:00:1f.2/ata2.2/link2.2/dev2.2.0/ata_device
./pci0000:00/0000:00:1f.2/ata2.2/link2.2/ata_link
./pci0000:00/0000:00:1f.2/ata2.2/ata_port
./pci0000:00/0000:00:1f.2/ata2.2/ata_port/ata2.2
./pci0000:00/0000:00:1f.2/ata3.3
./pci0000:00/0000:00:1f.2/ata3.3/link3.3/dev3.3.0/ata_device
./pci0000:00/0000:00:1f.2/ata3.3/link3.3/ata_link
./pci0000:00/0000:00:1f.2/ata3.3/ata_port
./pci0000:00/0000:00:1f.2/ata3.3/ata_port/ata3.3
./pci0000:00/0000:00:1f.2/ata4.4
./pci0000:00/0000:00:1f.2/ata4.4/link4.4/dev4.4.0/ata_device
./pci0000:00/0000:00:1f.2/ata4.4/link4.4/ata_link
./pci0000:00/0000:00:1f.2/ata4.4/ata_port
./pci0000:00/0000:00:1f.2/ata4.4/ata_port/ata4.4
./pci0000:00/0000:00:1f.2/ata5.5
./pci0000:00/0000:00:1f.2/ata5.5/link5.5/dev5.5.0/ata_device
./pci0000:00/0000:00:1f.2/ata5.5/link5.5/ata_link
./pci0000:00/0000:00:1f.2/ata5.5/ata_port
./pci0000:00/0000:00:1f.2/ata5.5/ata_port/ata5.5
./pci0000:00/0000:00:1f.2/ata6.6
./pci0000:00/0000:00:1f.2/ata6.6/link6.6/dev6.6.0/ata_device
./pci0000:00/0000:00:1f.2/ata6.6/link6.6/ata_link
./pci0000:00/0000:00:1f.2/ata6.6/ata_port
./pci0000:00/0000:00:1f.2/ata6.6/ata_port/ata6.6

(2nd controller with port multiplier)

./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/dev7.1.10.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/dev7.1.11.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/dev7.1.12.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/dev7.1.13.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/dev7.1.14.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/dev7.1.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/dev7.1.0.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/dev7.1.1.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/dev7.1.2.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/dev7.1.3.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/dev7.1.4.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/dev7.1.5.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/dev7.1.6.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/dev7.1.7.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/dev7.1.8.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/dev7.1.9.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port/ata7.1
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/dev8.2.0/ata_device
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/ata_link
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port
./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port/ata8.2

Signed-off-by: David Milburn <dmilburn@redhat.com>
---
This could be modified to fit on top of "Insert ATA transport objects in SCSI
sysfs topology".

 drivers/ata/libata-core.c      |    6 ++++--
 drivers/ata/libata-transport.c |   10 +++++-----
 include/linux/libata.h         |    1 +
 3 files changed, 10 insertions(+), 7 deletions(-)

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David Milburn - Feb. 25, 2013, 9:04 p.m.
David Milburn wrote:
> Export <global port>.<local port> format through /sys
> 
> ./pci0000:00/0000:00:1f.2/ata1.1
> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/dev1.1.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/ata_link
> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port
> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port/ata1.1
> ./pci0000:00/0000:00:1f.2/ata2.2
> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/dev2.2.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/ata_link
> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port
> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port/ata2.2
> ./pci0000:00/0000:00:1f.2/ata3.3
> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/dev3.3.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/ata_link
> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port
> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port/ata3.3
> ./pci0000:00/0000:00:1f.2/ata4.4
> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/dev4.4.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/ata_link
> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port
> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port/ata4.4
> ./pci0000:00/0000:00:1f.2/ata5.5
> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/dev5.5.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/ata_link
> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port
> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port/ata5.5
> ./pci0000:00/0000:00:1f.2/ata6.6
> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/dev6.6.0/ata_device
> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/ata_link
> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port
> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port/ata6.6
> 
> (2nd controller with port multiplier)
> 
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/dev7.1.10.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/dev7.1.11.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/dev7.1.12.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/dev7.1.13.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/dev7.1.14.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/dev7.1.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/dev7.1.0.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/dev7.1.1.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/dev7.1.2.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/dev7.1.3.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/dev7.1.4.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/dev7.1.5.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/dev7.1.6.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/dev7.1.7.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/dev7.1.8.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/dev7.1.9.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port/ata7.1
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/dev8.2.0/ata_device
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/ata_link
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port
> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port/ata8.2
> 
> Signed-off-by: David Milburn <dmilburn@redhat.com>
> ---
> This could be modified to fit on top of "Insert ATA transport objects in SCSI
> sysfs topology".
> 
>  drivers/ata/libata-core.c      |    6 ++++--
>  drivers/ata/libata-transport.c |   10 +++++-----
>  include/linux/libata.h         |    1 +
>  3 files changed, 10 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index 4b6fb48..a796482 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -5629,6 +5629,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
>  	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
>  	ap->lock = &host->lock;
>  	ap->print_id = -1;
> +	ap->local_print_id = -1;
>  	ap->host = host;
>  	ap->dev = host->dev;
>  
> @@ -6119,9 +6120,10 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
>  		kfree(host->ports[i]);
>  
>  	/* give ports names and add SCSI hosts */
> -	for (i = 0; i < host->n_ports; i++)
> +	for (i = 0; i < host->n_ports; i++) {
>  		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
> -
> +		host->ports[i]->local_print_id = i + 1;
> +	}
>  
>  	/* Create associated sysfs transport objects  */
>  	for (i = 0; i < host->n_ports; i++) {
> diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
> index c04d393..176bed8 100644
> --- a/drivers/ata/libata-transport.c
> +++ b/drivers/ata/libata-transport.c
> @@ -284,7 +284,7 @@ int ata_tport_add(struct device *parent,
>  
>  	dev->parent = get_device(parent);
>  	dev->release = ata_tport_release;
> -	dev_set_name(dev, "ata%d", ap->print_id);
> +	dev_set_name(dev, "ata%d.%d", ap->print_id, ap->local_print_id);
>  	transport_setup_device(dev);
>  	error = device_add(dev);
>  	if (error) {
> @@ -410,9 +410,9 @@ int ata_tlink_add(struct ata_link *link)
>  	dev->parent = get_device(&ap->tdev);
>  	dev->release = ata_tlink_release;
>  	if (ata_is_host_link(link))
> -		dev_set_name(dev, "link%d", ap->print_id);
> +		dev_set_name(dev, "link%d.%d", ap->print_id, ap->local_print_id);
>          else
> -		dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
> +		dev_set_name(dev, "link%d.%d.%d", ap->print_id, ap->local_print_id, link->pmp);
>  
>  	transport_setup_device(dev);
>  
> @@ -638,9 +638,9 @@ static int ata_tdev_add(struct ata_device *ata_dev)
>  	dev->parent = get_device(&link->tdev);
>  	dev->release = ata_tdev_release;
>  	if (ata_is_host_link(link))
> -		dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
> +		dev_set_name(dev, "dev%d.%d.%d", ap->print_id, ap->local_print_id, ata_dev->devno);
>          else
> -		dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
> +		dev_set_name(dev, "dev%d.%d.%d.0", ap->print_id, ap->local_print_id, link->pmp);
>  
>  	transport_setup_device(dev);
>  	error = device_add(dev);
> diff --git a/include/linux/libata.h b/include/linux/libata.h
> index 91c9d10..62d5c1a 100644
> --- a/include/linux/libata.h
> +++ b/include/linux/libata.h
> @@ -745,6 +745,7 @@ struct ata_port {
>  	/* Flags that change dynamically, protected by ap->lock */
>  	unsigned int		pflags; /* ATA_PFLAG_xxx */
>  	unsigned int		print_id; /* user visible unique port ID */
> +	unsigned int            local_print_id; /* host local port ID */
>  	unsigned int		port_no; /* 0 based port no. inside the host */
>  
>  #ifdef CONFIG_ATA_SFF

Hi Jeff, Gwendal, Kay,

Any thoughts on this patch, is this something we could consider for
3.9?

Thanks,
David



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Jeff Garzik - Feb. 25, 2013, 9:16 p.m.
On 02/25/2013 04:04 PM, David Milburn wrote:
> Hi Jeff, Gwendal, Kay,
>
> Any thoughts on this patch, is this something we could consider for
> 3.9?

As I noted in the upstream push email (and associated git tag text), it 
did not seem like all parties were happy with the sysfs layout.

	Jeff



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Kay Sievers - Feb. 26, 2013, 3:26 p.m.
On Mon, Feb 25, 2013 at 10:04 PM, David Milburn <dmilburn@redhat.com> wrote:
> David Milburn wrote:
>>
>> Export <global port>.<local port> format through /sys
>>
>> ./pci0000:00/0000:00:1f.2/ata1.1
>> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/dev1.1.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/ata_link
>> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port
>> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port/ata1.1
>> ./pci0000:00/0000:00:1f.2/ata2.2
>> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/dev2.2.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/ata_link
>> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port
>> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port/ata2.2
>> ./pci0000:00/0000:00:1f.2/ata3.3
>> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/dev3.3.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/ata_link
>> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port
>> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port/ata3.3
>> ./pci0000:00/0000:00:1f.2/ata4.4
>> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/dev4.4.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/ata_link
>> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port
>> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port/ata4.4
>> ./pci0000:00/0000:00:1f.2/ata5.5
>> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/dev5.5.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/ata_link
>> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port
>> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port/ata5.5
>> ./pci0000:00/0000:00:1f.2/ata6.6
>> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/dev6.6.0/ata_device
>> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/ata_link
>> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port
>> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port/ata6.6
>>
>> (2nd controller with port multiplier)
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/dev7.1.10.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.10/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/dev7.1.11.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.11/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/dev7.1.12.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.12/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/dev7.1.13.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.13/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/dev7.1.14.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.14/ata_link
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/dev7.1.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/dev7.1.0.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.0/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/dev7.1.1.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.1/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/dev7.1.2.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.2/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/dev7.1.3.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.3/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/dev7.1.4.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.4/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/dev7.1.5.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.5/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/dev7.1.6.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.6/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/dev7.1.7.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.7/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/dev7.1.8.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.8/ata_link
>>
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/dev7.1.9.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/link7.1.9/ata_link
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata7.1/ata_port/ata7.1
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/dev8.2.0/ata_device
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/link8.2/ata_link
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port
>> ./pci0000:00/0000:00:1e.0/0000:05:01.0/ata8.2/ata_port/ata8.2
>>
>> Signed-off-by: David Milburn <dmilburn@redhat.com>
>> ---
>> This could be modified to fit on top of "Insert ATA transport objects in
>> SCSI
>> sysfs topology".
>>
>>  drivers/ata/libata-core.c      |    6 ++++--
>>  drivers/ata/libata-transport.c |   10 +++++-----
>>  include/linux/libata.h         |    1 +
>>  3 files changed, 10 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
>> index 4b6fb48..a796482 100644
>> --- a/drivers/ata/libata-core.c
>> +++ b/drivers/ata/libata-core.c
>> @@ -5629,6 +5629,7 @@ struct ata_port *ata_port_alloc(struct ata_host
>> *host)
>>         ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
>>         ap->lock = &host->lock;
>>         ap->print_id = -1;
>> +       ap->local_print_id = -1;
>>         ap->host = host;
>>         ap->dev = host->dev;
>>  @@ -6119,9 +6120,10 @@ int ata_host_register(struct ata_host *host,
>> struct scsi_host_template *sht)
>>                 kfree(host->ports[i]);
>>         /* give ports names and add SCSI hosts */
>> -       for (i = 0; i < host->n_ports; i++)
>> +       for (i = 0; i < host->n_ports; i++) {
>>                 host->ports[i]->print_id =
>> atomic_inc_return(&ata_print_id);
>> -
>> +               host->ports[i]->local_print_id = i + 1;
>> +       }
>>         /* Create associated sysfs transport objects  */
>>         for (i = 0; i < host->n_ports; i++) {
>> diff --git a/drivers/ata/libata-transport.c
>> b/drivers/ata/libata-transport.c
>> index c04d393..176bed8 100644
>> --- a/drivers/ata/libata-transport.c
>> +++ b/drivers/ata/libata-transport.c
>> @@ -284,7 +284,7 @@ int ata_tport_add(struct device *parent,
>>         dev->parent = get_device(parent);
>>         dev->release = ata_tport_release;
>> -       dev_set_name(dev, "ata%d", ap->print_id);
>> +       dev_set_name(dev, "ata%d.%d", ap->print_id, ap->local_print_id);
>>         transport_setup_device(dev);
>>         error = device_add(dev);
>>         if (error) {
>> @@ -410,9 +410,9 @@ int ata_tlink_add(struct ata_link *link)
>>         dev->parent = get_device(&ap->tdev);
>>         dev->release = ata_tlink_release;
>>         if (ata_is_host_link(link))
>> -               dev_set_name(dev, "link%d", ap->print_id);
>> +               dev_set_name(dev, "link%d.%d", ap->print_id,
>> ap->local_print_id);
>>          else
>> -               dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
>> +               dev_set_name(dev, "link%d.%d.%d", ap->print_id,
>> ap->local_print_id, link->pmp);
>>         transport_setup_device(dev);
>>  @@ -638,9 +638,9 @@ static int ata_tdev_add(struct ata_device *ata_dev)
>>         dev->parent = get_device(&link->tdev);
>>         dev->release = ata_tdev_release;
>>         if (ata_is_host_link(link))
>> -               dev_set_name(dev, "dev%d.%d",
>> ap->print_id,ata_dev->devno);
>> +               dev_set_name(dev, "dev%d.%d.%d", ap->print_id,
>> ap->local_print_id, ata_dev->devno);
>>          else
>> -               dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
>> +               dev_set_name(dev, "dev%d.%d.%d.0", ap->print_id,
>> ap->local_print_id, link->pmp);
>>         transport_setup_device(dev);
>>         error = device_add(dev);
>> diff --git a/include/linux/libata.h b/include/linux/libata.h
>> index 91c9d10..62d5c1a 100644
>> --- a/include/linux/libata.h
>> +++ b/include/linux/libata.h
>> @@ -745,6 +745,7 @@ struct ata_port {
>>         /* Flags that change dynamically, protected by ap->lock */
>>         unsigned int            pflags; /* ATA_PFLAG_xxx */
>>         unsigned int            print_id; /* user visible unique port ID
>> */
>> +       unsigned int            local_print_id; /* host local port ID */
>>         unsigned int            port_no; /* 0 based port no. inside the
>> host */
>>   #ifdef CONFIG_ATA_SFF
>
>
> Hi Jeff, Gwendal, Kay,
>
> Any thoughts on this patch, is this something we could consider for
> 3.9?

Hannes, could you please take a look at this?

We need to find out what the best options are to use to compose
persistent links in /dev/disk/by-path/.

Cheers,
Kay
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Hannes Reinecke - March 5, 2013, 3:48 p.m.
On 02/26/2013 04:26 PM, Kay Sievers wrote:
> On Mon, Feb 25, 2013 at 10:04 PM, David Milburn <dmilburn@redhat.com> wrote:
>> David Milburn wrote:
>>>
>>> Export <global port>.<local port> format through /sys
>>>
>>> ./pci0000:00/0000:00:1f.2/ata1.1
>>> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/dev1.1.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata1.1/link1.1/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata1.1/ata_port/ata1.1
>>> ./pci0000:00/0000:00:1f.2/ata2.2
>>> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/dev2.2.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata2.2/link2.2/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata2.2/ata_port/ata2.2
>>> ./pci0000:00/0000:00:1f.2/ata3.3
>>> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/dev3.3.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata3.3/link3.3/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata3.3/ata_port/ata3.3
>>> ./pci0000:00/0000:00:1f.2/ata4.4
>>> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/dev4.4.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata4.4/link4.4/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata4.4/ata_port/ata4.4
>>> ./pci0000:00/0000:00:1f.2/ata5.5
>>> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/dev5.5.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata5.5/link5.5/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata5.5/ata_port/ata5.5
>>> ./pci0000:00/0000:00:1f.2/ata6.6
>>> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/dev6.6.0/ata_device
>>> ./pci0000:00/0000:00:1f.2/ata6.6/link6.6/ata_link
>>> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port
>>> ./pci0000:00/0000:00:1f.2/ata6.6/ata_port/ata6.6
>>>
Hmm.

Can't say I like the 'global port' notation.
Personally I would prefer to have a sysfs attribute for the local 
port number, and have path_id get it from there.

For 95% of all cases the above is just an information duplication 
(ie it'll only provide a real value for udev, but not for the user).

So, please, use a sysfs attribute for the local port and keep the 
numbering as it is.

Cheers,

Hannes

Patch

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4b6fb48..a796482 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5629,6 +5629,7 @@  struct ata_port *ata_port_alloc(struct ata_host *host)
 	ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
 	ap->lock = &host->lock;
 	ap->print_id = -1;
+	ap->local_print_id = -1;
 	ap->host = host;
 	ap->dev = host->dev;
 
@@ -6119,9 +6120,10 @@  int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		kfree(host->ports[i]);
 
 	/* give ports names and add SCSI hosts */
-	for (i = 0; i < host->n_ports; i++)
+	for (i = 0; i < host->n_ports; i++) {
 		host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
-
+		host->ports[i]->local_print_id = i + 1;
+	}
 
 	/* Create associated sysfs transport objects  */
 	for (i = 0; i < host->n_ports; i++) {
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index c04d393..176bed8 100644
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -284,7 +284,7 @@  int ata_tport_add(struct device *parent,
 
 	dev->parent = get_device(parent);
 	dev->release = ata_tport_release;
-	dev_set_name(dev, "ata%d", ap->print_id);
+	dev_set_name(dev, "ata%d.%d", ap->print_id, ap->local_print_id);
 	transport_setup_device(dev);
 	error = device_add(dev);
 	if (error) {
@@ -410,9 +410,9 @@  int ata_tlink_add(struct ata_link *link)
 	dev->parent = get_device(&ap->tdev);
 	dev->release = ata_tlink_release;
 	if (ata_is_host_link(link))
-		dev_set_name(dev, "link%d", ap->print_id);
+		dev_set_name(dev, "link%d.%d", ap->print_id, ap->local_print_id);
         else
-		dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
+		dev_set_name(dev, "link%d.%d.%d", ap->print_id, ap->local_print_id, link->pmp);
 
 	transport_setup_device(dev);
 
@@ -638,9 +638,9 @@  static int ata_tdev_add(struct ata_device *ata_dev)
 	dev->parent = get_device(&link->tdev);
 	dev->release = ata_tdev_release;
 	if (ata_is_host_link(link))
-		dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
+		dev_set_name(dev, "dev%d.%d.%d", ap->print_id, ap->local_print_id, ata_dev->devno);
         else
-		dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
+		dev_set_name(dev, "dev%d.%d.%d.0", ap->print_id, ap->local_print_id, link->pmp);
 
 	transport_setup_device(dev);
 	error = device_add(dev);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 91c9d10..62d5c1a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -745,6 +745,7 @@  struct ata_port {
 	/* Flags that change dynamically, protected by ap->lock */
 	unsigned int		pflags; /* ATA_PFLAG_xxx */
 	unsigned int		print_id; /* user visible unique port ID */
+	unsigned int            local_print_id; /* host local port ID */
 	unsigned int		port_no; /* 0 based port no. inside the host */
 
 #ifdef CONFIG_ATA_SFF