linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Rakesh Pandit <rakesh@tuxera.com>
To: Matias Bjorling <mb@lightnvm.io>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Javier González" <jg@lightnvm.io>
Subject: [PATCH] lightnvm: propagate pblk_init return to userspace
Date: Thu, 20 Apr 2017 21:23:56 +0300	[thread overview]
Message-ID: <20170420182356.GA7866@hercules.tuxera.com> (raw)

>From userspace calling ioctl(NVM_DEV_CREATE) was returning ENOMEM for
invalid arguments even though pblk (pblk_init) was returning correctly
-EINVAL to nvm_create_tgt inside core.  This patch propagates the
correct return value to userspace.

Because pblk was introduced recently this only needs to go in 4.12.

Fixes: a4bd217b4326 ("lightnvm: physical block device (pblk) target")
Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
---
 drivers/lightnvm/core.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 5d7aa45..54a06c3 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -235,6 +235,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	struct nvm_target *t;
 	struct nvm_tgt_dev *tgt_dev;
 	void *targetdata;
+	int ret;
 
 	tt = nvm_find_target_type(create->tgttype, 1);
 	if (!tt) {
@@ -255,22 +256,29 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 		return -ENOMEM;
 
 	t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
-	if (!t)
+	if (!t) {
+		ret = -ENOMEM;
 		goto err_reserve;
+	}
 
 	tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end);
 	if (!tgt_dev) {
 		pr_err("nvm: could not create target device\n");
+		ret = -ENOMEM;
 		goto err_t;
 	}
 
 	tdisk = alloc_disk(0);
-	if (!tdisk)
+	if (!tdisk) {
+		ret = -ENOMEM;
 		goto err_dev;
+	}
 
 	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
-	if (!tqueue)
+	if (!tqueue) {
+		ret = -ENOMEM;
 		goto err_disk;
+	}
 	blk_queue_make_request(tqueue, tt->make_rq);
 
 	strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
@@ -281,8 +289,10 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	tdisk->queue = tqueue;
 
 	targetdata = tt->init(tgt_dev, tdisk, create->flags);
-	if (IS_ERR(targetdata))
+	if (IS_ERR(targetdata)) {
+		ret = PTR_ERR(targetdata);
 		goto err_init;
+	}
 
 	tdisk->private_data = targetdata;
 	tqueue->queuedata = targetdata;
@@ -292,8 +302,10 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	set_capacity(tdisk, tt->capacity(targetdata));
 	add_disk(tdisk);
 
-	if (tt->sysfs_init && tt->sysfs_init(tdisk))
+	if (tt->sysfs_init && tt->sysfs_init(tdisk)) {
+		ret = -ENOMEM;
 		goto err_sysfs;
+	}
 
 	t->type = tt;
 	t->disk = tdisk;
@@ -318,7 +330,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	kfree(t);
 err_reserve:
 	nvm_release_luns_err(dev, s->lun_begin, s->lun_end);
-	return -ENOMEM;
+	return ret;
 }
 
 static void __nvm_remove_target(struct nvm_target *t)
-- 
2.9.3

             reply	other threads:[~2017-04-20 18:24 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-20 18:23 Rakesh Pandit [this message]
2017-04-21 15:07 ` [PATCH] lightnvm: propagate pblk_init return to userspace Javier González
2017-04-21 18:11   ` Matias Bjørling
2017-04-21 18:41     ` Jens Axboe

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=20170420182356.GA7866@hercules.tuxera.com \
    --to=rakesh@tuxera.com \
    --cc=jg@lightnvm.io \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mb@lightnvm.io \
    /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).