From: "Javier González" <javier@javigon.com>
To: Hannes Reinecke <hare@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Hannes Reinecke <hare@suse.com>,
Sagi Grimberg <sagi@grimberg.me>,
Linux Kernel Mailinglist <linux-kernel@vger.kernel.org>,
linux-nvme@lists.infradead.org,
Keith Busch <keith.busch@intel.com>,
Bart van Assche <bart.vanassche@wdc.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 2/5] nvme: register ns_id attributes as default sysfs groups
Date: Tue, 14 Aug 2018 11:03:37 +0200 [thread overview]
Message-ID: <7DC1C517-A47E-4DB3-9D17-9EFB94073887@javigon.com> (raw)
In-Reply-To: <20180814073305.87255-3-hare@suse.de>
[-- Attachment #1: Type: text/plain, Size: 6945 bytes --]
>
> On 14 Aug 2018, at 09.33, Hannes Reinecke <hare@suse.de> wrote:
>
> We should be registering the ns_id attribute as default sysfs
> attribute groups, otherwise we have a race condition between
> the uevent and the attributes appearing in sysfs.
>
> Signed-off-by: Hannes Reinecke <hare@suse.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/nvme/host/core.c | 21 +++++++++------------
> drivers/nvme/host/lightnvm.c | 27 ++++-----------------------
> drivers/nvme/host/multipath.c | 15 ++++-----------
> drivers/nvme/host/nvme.h | 11 +++--------
> 4 files changed, 20 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 0e824e8c8fd7..8e26d98e9a8f 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -2734,6 +2734,12 @@ const struct attribute_group nvme_ns_id_attr_group = {
> .is_visible = nvme_ns_id_attrs_are_visible,
> };
>
> +const struct attribute_group *nvme_ns_id_attr_groups[] = {
> + &nvme_ns_id_attr_group,
> + NULL, /* Will be filled in by lightnvm if present */
> + NULL,
> +};
> +
> #define nvme_show_str_function(field) \
> static ssize_t field##_show(struct device *dev, \
> struct device_attribute *attr, char *buf) \
> @@ -3099,14 +3105,9 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
>
> nvme_get_ctrl(ctrl);
>
> - device_add_disk(ctrl->device, ns->disk, NULL);
> - if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
> - &nvme_ns_id_attr_group))
> - pr_warn("%s: failed to create sysfs group for identification\n",
> - ns->disk->disk_name);
> - if (ns->ndev && nvme_nvm_register_sysfs(ns))
> - pr_warn("%s: failed to register lightnvm sysfs group for identification\n",
> - ns->disk->disk_name);
> + if (ns->ndev)
> + nvme_nvm_register_sysfs(ns);
> + device_add_disk(ctrl->device, ns->disk, nvme_ns_id_attr_groups);
>
> nvme_mpath_add_disk(ns, id);
> nvme_fault_inject_init(ns);
> @@ -3132,10 +3133,6 @@ static void nvme_ns_remove(struct nvme_ns *ns)
>
> nvme_fault_inject_fini(ns);
> if (ns->disk && ns->disk->flags & GENHD_FL_UP) {
> - sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
> - &nvme_ns_id_attr_group);
> - if (ns->ndev)
> - nvme_nvm_unregister_sysfs(ns);
> del_gendisk(ns->disk);
> blk_cleanup_queue(ns->queue);
> if (blk_get_integrity(ns->disk))
> diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
> index 6fe5923c95d4..7bf2f9da6293 100644
> --- a/drivers/nvme/host/lightnvm.c
> +++ b/drivers/nvme/host/lightnvm.c
> @@ -1270,39 +1270,20 @@ static const struct attribute_group nvm_dev_attr_group_20 = {
> .attrs = nvm_dev_attrs_20,
> };
>
> -int nvme_nvm_register_sysfs(struct nvme_ns *ns)
> +void nvme_nvm_register_sysfs(struct nvme_ns *ns)
> {
> struct nvm_dev *ndev = ns->ndev;
> struct nvm_geo *geo = &ndev->geo;
>
> if (!ndev)
> - return -EINVAL;
> -
> - switch (geo->major_ver_id) {
> - case 1:
> - return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
> - &nvm_dev_attr_group_12);
> - case 2:
> - return sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
> - &nvm_dev_attr_group_20);
> - }
> -
> - return -EINVAL;
> -}
> -
> -void nvme_nvm_unregister_sysfs(struct nvme_ns *ns)
> -{
> - struct nvm_dev *ndev = ns->ndev;
> - struct nvm_geo *geo = &ndev->geo;
> + return;
>
> switch (geo->major_ver_id) {
> case 1:
> - sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
> - &nvm_dev_attr_group_12);
> + nvme_ns_id_attr_groups[1] = &nvm_dev_attr_group_12;
> break;
> case 2:
> - sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
> - &nvm_dev_attr_group_20);
> + nvme_ns_id_attr_groups[1] = &nvm_dev_attr_group_20;
> break;
> }
> }
> diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
> index 477af51d01e8..8e846095c42d 100644
> --- a/drivers/nvme/host/multipath.c
> +++ b/drivers/nvme/host/multipath.c
> @@ -282,13 +282,9 @@ static void nvme_mpath_set_live(struct nvme_ns *ns)
> if (!head->disk)
> return;
>
> - if (!(head->disk->flags & GENHD_FL_UP)) {
> - device_add_disk(&head->subsys->dev, head->disk, NULL);
> - if (sysfs_create_group(&disk_to_dev(head->disk)->kobj,
> - &nvme_ns_id_attr_group))
> - dev_warn(&head->subsys->dev,
> - "failed to create id group.\n");
> - }
> + if (!(head->disk->flags & GENHD_FL_UP))
> + device_add_disk(&head->subsys->dev, head->disk,
> + nvme_ns_id_attr_groups);
>
> kblockd_schedule_work(&ns->head->requeue_work);
> }
> @@ -494,11 +490,8 @@ void nvme_mpath_remove_disk(struct nvme_ns_head *head)
> {
> if (!head->disk)
> return;
> - if (head->disk->flags & GENHD_FL_UP) {
> - sysfs_remove_group(&disk_to_dev(head->disk)->kobj,
> - &nvme_ns_id_attr_group);
> + if (head->disk->flags & GENHD_FL_UP)
> del_gendisk(head->disk);
> - }
> blk_set_queue_dying(head->disk->queue);
> /* make sure all pending bios are cleaned up */
> kblockd_schedule_work(&head->requeue_work);
> diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
> index bb4a2003c097..9ba6d67d8e0a 100644
> --- a/drivers/nvme/host/nvme.h
> +++ b/drivers/nvme/host/nvme.h
> @@ -459,7 +459,7 @@ int nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
> int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp,
> void *log, size_t size, u64 offset);
>
> -extern const struct attribute_group nvme_ns_id_attr_group;
> +extern const struct attribute_group *nvme_ns_id_attr_groups[];
> extern const struct block_device_operations nvme_ns_head_ops;
>
> #ifdef CONFIG_NVME_MULTIPATH
> @@ -551,8 +551,7 @@ static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
> void nvme_nvm_update_nvm_info(struct nvme_ns *ns);
> int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
> void nvme_nvm_unregister(struct nvme_ns *ns);
> -int nvme_nvm_register_sysfs(struct nvme_ns *ns);
> -void nvme_nvm_unregister_sysfs(struct nvme_ns *ns);
> +void nvme_nvm_register_sysfs(struct nvme_ns *ns);
> int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg);
> #else
> static inline void nvme_nvm_update_nvm_info(struct nvme_ns *ns) {};
> @@ -563,11 +562,7 @@ static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
> }
>
> static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
> -static inline int nvme_nvm_register_sysfs(struct nvme_ns *ns)
> -{
> - return 0;
> -}
> -static inline void nvme_nvm_unregister_sysfs(struct nvme_ns *ns) {};
> +static inline void nvme_nvm_register_sysfs(struct nvme_ns *ns) {};
> static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
> unsigned long arg)
> {
> --
> 2.12.3
>
>
The lightnvm part you added to V2 looks good. Thanks!
Reviewed-by: Javier González <javier@cnexlabs.com>
[-- Attachment #2: Message signed with OpenPGP --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2018-08-14 9:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-14 7:33 [PATCHv2 0/5] genhd: register default groups with device_add_disk() Hannes Reinecke
2018-08-14 7:33 ` [PATCH 1/5] block: genhd: add 'groups' argument to device_add_disk Hannes Reinecke
2018-08-14 15:17 ` Bart Van Assche
2018-08-14 7:33 ` [PATCH 2/5] nvme: register ns_id attributes as default sysfs groups Hannes Reinecke
2018-08-14 9:03 ` Javier González [this message]
2018-08-14 9:59 ` Matias Bjørling
2018-08-14 15:20 ` Bart Van Assche
2018-08-14 15:39 ` Hannes Reinecke
2018-08-14 15:44 ` Bart Van Assche
2018-08-17 7:00 ` hch
2018-08-17 7:53 ` Hannes Reinecke
2018-08-17 20:04 ` Bart Van Assche
2018-08-17 22:47 ` Sagi Grimberg
2018-08-20 6:34 ` Hannes Reinecke
2018-08-14 21:53 ` kbuild test robot
2018-08-14 21:53 ` [RFC PATCH] nvme: nvme_ns_id_attr_group can be static kbuild test robot
2018-08-17 6:55 ` [PATCH 2/5] nvme: register ns_id attributes as default sysfs groups Christoph Hellwig
2018-08-14 7:33 ` [PATCH 3/5] aoe: use device_add_disk_with_groups() Hannes Reinecke
2018-08-14 15:21 ` Bart Van Assche
2018-08-17 6:53 ` Christoph Hellwig
2018-08-14 7:33 ` [PATCH 4/5] zram: register default groups with device_add_disk() Hannes Reinecke
2018-08-14 15:23 ` Bart Van Assche
2018-08-14 7:33 ` [PATCH 5/5] virtio-blk: modernize sysfs attribute creation Hannes Reinecke
2018-08-14 15:24 ` Bart Van Assche
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7DC1C517-A47E-4DB3-9D17-9EFB94073887@javigon.com \
--to=javier@javigon.com \
--cc=axboe@kernel.dk \
--cc=bart.vanassche@wdc.com \
--cc=hare@suse.com \
--cc=hare@suse.de \
--cc=hch@lst.de \
--cc=keith.busch@intel.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=sagi@grimberg.me \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).