linux-kernel - [PATCH] staging: lustre: replace static value with define

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Message-Id: <1417850172-17092-1-git-send-email-tristan@lelong.xyz>
Date:	Fri,  5 Dec 2014 23:16:12 -0800
From:	Tristan Lelong <tristan@...ong.xyz>
To:	oleg.drokin@...el.com, andreas.dilger@...el.com,
	gregkh@...uxfoundation.org, standby24x7@...il.com,
	askb23@...il.com, john.hammond@...el.com, bergwolf@...il.com,
	di.wang@...el.com, mike.pershin@...el.com, joe@...ches.com
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Tristan Lelong <tristan@...ong.xyz>
Subject: [PATCH] staging: lustre: replace static value with define

This patch replace the value '80' used in several files in the lustre source code
with a define LUSTRE_MDT_MAXNAMELEN.

This value is used in 4 different structures as the maximum len for a service name.
According to the comments, these names follow a convention which make it possible
to use the same define for LCS, LSS, LCF, and LSF names.

Signed-off-by: Tristan Lelong <tristan@...ong.xyz>
---
Note:
	This modification answers Joe Perches suggestion: https://lkml.org/lkml/2014/12/5/107
	The patch has to be applied on top of https://lkml.org/lkml/2014/12/6/17
---
 drivers/staging/lustre/lustre/fld/fld_internal.h          | 2 +-
 drivers/staging/lustre/lustre/fld/lproc_fld.c             | 2 +-
 drivers/staging/lustre/lustre/include/lustre/lustre_idl.h | 5 +++++
 drivers/staging/lustre/lustre/include/lustre_fid.h        | 4 ++--
 drivers/staging/lustre/lustre/include/lustre_fld.h        | 4 ++--
 5 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fld/fld_internal.h b/drivers/staging/lustre/lustre/fld/fld_internal.h
index 8806b60..6125bbe 100644
--- a/drivers/staging/lustre/lustre/fld/fld_internal.h
+++ b/drivers/staging/lustre/lustre/fld/fld_internal.h
@@ -111,7 +111,7 @@ struct fld_cache {
 
 	/**
 	 * Cache name used for debug and messages. */
-	char		     fci_name[80];
+	char		     fci_name[LUSTRE_MDT_MAXNAMELEN];
 	unsigned int		 fci_no_shrink:1;
 };
 
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 74b4db9..7a55941 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -96,7 +96,7 @@ fld_proc_hash_seq_write(struct file *file,
 	char *name;
 	int i;
 
-	if (count > 80)
+	if (count > LUSTRE_MDT_MAXNAMELEN)
 		return -ENAMETOOLONG;
 
 	name = kmalloc(count, GFP_KERNEL);
diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index 7b7457c..305ecbe 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -105,6 +105,11 @@
  * FOO_BULK_PORTAL    is for incoming bulk on the FOO
  */
 
+/* Lustre service names are following the format
+ * service name + MDT + seq name
+ */
+#define LUSTRE_MDT_MAXNAMELEN	80
+
 #define CONNMGR_REQUEST_PORTAL	  1
 #define CONNMGR_REPLY_PORTAL	    2
 //#define OSC_REQUEST_PORTAL	    3
diff --git a/drivers/staging/lustre/lustre/include/lustre_fid.h b/drivers/staging/lustre/lustre/include/lustre_fid.h
index 2d6fbb4..0a0929f 100644
--- a/drivers/staging/lustre/lustre/include/lustre_fid.h
+++ b/drivers/staging/lustre/lustre/include/lustre_fid.h
@@ -358,7 +358,7 @@ struct lu_client_seq {
 	 * Service uuid, passed from MDT + seq name to form unique seq name to
 	 * use it with procfs.
 	 */
-	char		    lcs_name[80];
+	char		    lcs_name[LUSTRE_MDT_MAXNAMELEN];
 
 	/*
 	 * Sequence width, that is how many objects may be allocated in one
@@ -408,7 +408,7 @@ struct lu_server_seq {
 	 * Service uuid, passed from MDT + seq name to form unique seq name to
 	 * use it with procfs.
 	 */
-	char		    lss_name[80];
+	char		    lss_name[LUSTRE_MDT_MAXNAMELEN];
 
 	/*
 	 * Allocation chunks for super and meta sequences. Default values are
diff --git a/drivers/staging/lustre/lustre/include/lustre_fld.h b/drivers/staging/lustre/lustre/include/lustre_fld.h
index 64c5048..5ee4b1e 100644
--- a/drivers/staging/lustre/lustre/include/lustre_fld.h
+++ b/drivers/staging/lustre/lustre/include/lustre_fld.h
@@ -93,7 +93,7 @@ struct lu_server_fld {
 
 	/**
 	 * Fld service name in form "fld-srv-lustre-MDTXXX" */
-	char		     lsf_name[80];
+	char		     lsf_name[LUSTRE_MDT_MAXNAMELEN];
 
 };
 
@@ -124,7 +124,7 @@ struct lu_client_fld {
 
 	/**
 	 * Client fld proc entry name. */
-	char		     lcf_name[80];
+	char		     lcf_name[LUSTRE_MDT_MAXNAMELEN];
 
 	int		      lcf_flags;
 };
-- 
2.1.1

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