[v2,1/3] nbd: use pr_err to output error message

Commit Message

Hou Tao Sept. 4, 2021, 12:25 p.m. UTC

Instead of using the long printk(KERN_ERR "nbd: ...") to
output error message, defining pr_fmt and using
the short pr_err("") to do that. The replacemen is done
by using the following command:

  sed -i 's/printk(KERN_ERR "nbd: /pr_err("/g' \
		  drivers/block/nbd.c

Signed-off-by: Hou Tao <[e-mail]>
---
 drivers/block/nbd.c | 35 +++++++++++++++++++----------------
 1 file changed, 19 insertions(+), 16 deletions(-)

Comments

Christoph Hellwig Sept. 6, 2021, 9:27 a.m. UTC | #1

Looks good,

Reviewed-by: Christoph Hellwig <[e-mail]>

Patch

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 5170a630778d..ef94f62895d6 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -44,6 +44,9 @@ 
 #include <linux/nbd-netlink.h>
 #include <net/genetlink.h>
 
+#undef pr_fmt
+#define pr_fmt(fmt) "nbd: " fmt
+
 #define CREATE_TRACE_POINTS
 #include <trace/events/nbd.h>
 
@@ -1854,11 +1857,11 @@  static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 	if (info->attrs[NBD_ATTR_INDEX])
 		index = nla_get_u32(info->attrs[NBD_ATTR_INDEX]);
 	if (!info->attrs[NBD_ATTR_SOCKETS]) {
-		printk(KERN_ERR "nbd: must specify at least one socket\n");
+		pr_err("must specify at least one socket\n");
 		return -EINVAL;
 	}
 	if (!info->attrs[NBD_ATTR_SIZE_BYTES]) {
-		printk(KERN_ERR "nbd: must specify a size in bytes for the device\n");
+		pr_err("must specify a size in bytes for the device\n");
 		return -EINVAL;
 	}
 again:
@@ -1894,7 +1897,7 @@  static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 		nbd_put(nbd);
 		if (index == -1)
 			goto again;
-		printk(KERN_ERR "nbd: nbd%d already in use\n", index);
+		pr_err("nbd%d already in use\n", index);
 		return -EBUSY;
 	}
 	if (WARN_ON(nbd->config)) {
@@ -1906,7 +1909,7 @@  static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 	if (!nbd->config) {
 		mutex_unlock(&nbd->config_lock);
 		nbd_put(nbd);
-		printk(KERN_ERR "nbd: couldn't allocate config\n");
+		pr_err("nbd: couldn't allocate config\n");
 		return -ENOMEM;
 	}
 	refcount_set(&nbd->config_refs, 1);
@@ -1961,7 +1964,7 @@  static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 			struct nlattr *socks[NBD_SOCK_MAX+1];
 
 			if (nla_type(attr) != NBD_SOCK_ITEM) {
-				printk(KERN_ERR "nbd: socks must be embedded in a SOCK_ITEM attr\n");
+				pr_err("socks must be embedded in a SOCK_ITEM attr\n");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -1970,7 +1973,7 @@  static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 							  nbd_sock_policy,
 							  info->extack);
 			if (ret != 0) {
-				printk(KERN_ERR "nbd: error processing sock list\n");
+				pr_err("error processing sock list\n");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -2044,7 +2047,7 @@  static int nbd_genl_disconnect(struct sk_buff *skb, struct genl_info *info)
 		return -EPERM;
 
 	if (!info->attrs[NBD_ATTR_INDEX]) {
-		printk(KERN_ERR "nbd: must specify an index to disconnect\n");
+		pr_err("must specify an index to disconnect\n");
 		return -EINVAL;
 	}
 	index = nla_get_u32(info->attrs[NBD_ATTR_INDEX]);
@@ -2052,13 +2055,13 @@  static int nbd_genl_disconnect(struct sk_buff *skb, struct genl_info *info)
 	nbd = idr_find(&nbd_index_idr, index);
 	if (!nbd) {
 		mutex_unlock(&nbd_index_mutex);
-		printk(KERN_ERR "nbd: couldn't find device at index %d\n",
+		pr_err("couldn't find device at index %d\n",
 		       index);
 		return -EINVAL;
 	}
 	if (!refcount_inc_not_zero(&nbd->refs)) {
 		mutex_unlock(&nbd_index_mutex);
-		printk(KERN_ERR "nbd: device at index %d is going down\n",
+		pr_err("device at index %d is going down\n",
 		       index);
 		return -EINVAL;
 	}
@@ -2084,7 +2087,7 @@  static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
 		return -EPERM;
 
 	if (!info->attrs[NBD_ATTR_INDEX]) {
-		printk(KERN_ERR "nbd: must specify a device to reconfigure\n");
+		pr_err("must specify a device to reconfigure\n");
 		return -EINVAL;
 	}
 	index = nla_get_u32(info->attrs[NBD_ATTR_INDEX]);
@@ -2092,7 +2095,7 @@  static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
 	nbd = idr_find(&nbd_index_idr, index);
 	if (!nbd) {
 		mutex_unlock(&nbd_index_mutex);
-		printk(KERN_ERR "nbd: couldn't find a device at index %d\n",
+		pr_err("couldn't find a device at index %d\n",
 		       index);
 		return -EINVAL;
 	}
@@ -2114,7 +2117,7 @@  static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
 	}
 	if (!refcount_inc_not_zero(&nbd->refs)) {
 		mutex_unlock(&nbd_index_mutex);
-		printk(KERN_ERR "nbd: device at index %d is going down\n",
+		pr_err("device at index %d is going down\n",
 		       index);
 		return -EINVAL;
 	}
@@ -2179,7 +2182,7 @@  static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
 			struct nlattr *socks[NBD_SOCK_MAX+1];
 
 			if (nla_type(attr) != NBD_SOCK_ITEM) {
-				printk(KERN_ERR "nbd: socks must be embedded in a SOCK_ITEM attr\n");
+				pr_err("socks must be embedded in a SOCK_ITEM attr\n");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -2188,7 +2191,7 @@  static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
 							  nbd_sock_policy,
 							  info->extack);
 			if (ret != 0) {
-				printk(KERN_ERR "nbd: error processing sock list\n");
+				pr_err("error processing sock list\n");
 				ret = -EINVAL;
 				goto out;
 			}
@@ -2405,7 +2408,7 @@  static int __init nbd_init(void)
 	BUILD_BUG_ON(sizeof(struct nbd_request) != 28);
 
 	if (max_part < 0) {
-		printk(KERN_ERR "nbd: max_part must be >= 0\n");
+		pr_err("max_part must be >= 0\n");
 		return -EINVAL;
 	}
 
@@ -2478,7 +2481,7 @@  static void __exit nbd_cleanup(void)
 		nbd = list_first_entry(&del_list, struct nbd_device, list);
 		list_del_init(&nbd->list);
 		if (refcount_read(&nbd->refs) != 1)
-			printk(KERN_ERR "nbd: possibly leaking a device\n");
+			pr_err("possibly leaking a device\n");
 		nbd_put(nbd);
 	}