* [PATCH] gfs: no need to check return value of debugfs_create functions
@ 2019-01-22 15:21 ` Greg Kroah-Hartman
0 siblings, 0 replies; 4+ messages in thread
From: Greg Kroah-Hartman @ 2019-01-22 15:21 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, Bob Peterson, Andreas Gruenbacher, cluster-devel
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
There is no need to save the dentries for the debugfs files, so drop
those variables to save a bit of space and make the code simpler.
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: cluster-devel@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/gfs2/glock.c | 70 ++++++++++--------------------------------------
fs/gfs2/glock.h | 4 +--
fs/gfs2/incore.h | 3 ---
fs/gfs2/main.c | 6 +----
4 files changed, 17 insertions(+), 66 deletions(-)
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index b92740edc416..f66773c71bcd 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -2131,71 +2131,29 @@ static const struct file_operations gfs2_sbstats_fops = {
.release = seq_release,
};
-int gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
-{
- struct dentry *dent;
-
- dent = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dir = dent;
-
- dent = debugfs_create_file("glocks",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_glocks_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_glocks = dent;
-
- dent = debugfs_create_file("glstats",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_glstats_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_glstats = dent;
-
- dent = debugfs_create_file("sbstats",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_sbstats_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_sbstats = dent;
+void gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
+{
+ sdp->debugfs_dir = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
- return 0;
-fail:
- gfs2_delete_debugfs_file(sdp);
- return dent ? PTR_ERR(dent) : -ENOMEM;
+ debugfs_create_file("glocks", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_glocks_fops);
+
+ debugfs_create_file("glstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_glstats_fops);
+
+ debugfs_create_file("sbstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_sbstats_fops);
}
void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp)
{
- if (sdp->debugfs_dir) {
- if (sdp->debugfs_dentry_glocks) {
- debugfs_remove(sdp->debugfs_dentry_glocks);
- sdp->debugfs_dentry_glocks = NULL;
- }
- if (sdp->debugfs_dentry_glstats) {
- debugfs_remove(sdp->debugfs_dentry_glstats);
- sdp->debugfs_dentry_glstats = NULL;
- }
- if (sdp->debugfs_dentry_sbstats) {
- debugfs_remove(sdp->debugfs_dentry_sbstats);
- sdp->debugfs_dentry_sbstats = NULL;
- }
- debugfs_remove(sdp->debugfs_dir);
- sdp->debugfs_dir = NULL;
- }
+ debugfs_remove_recursive(sdp->debugfs_dir);
+ sdp->debugfs_dir = NULL;
}
-int gfs2_register_debugfs(void)
+void gfs2_register_debugfs(void)
{
gfs2_root = debugfs_create_dir("gfs2", NULL);
- if (IS_ERR(gfs2_root))
- return PTR_ERR(gfs2_root);
- return gfs2_root ? 0 : -ENOMEM;
}
void gfs2_unregister_debugfs(void)
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 8949bf28b249..936b3295839c 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -243,9 +243,9 @@ extern void gfs2_glock_free(struct gfs2_glock *gl);
extern int __init gfs2_glock_init(void);
extern void gfs2_glock_exit(void);
-extern int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
+extern void gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
-extern int gfs2_register_debugfs(void);
+extern void gfs2_register_debugfs(void);
extern void gfs2_unregister_debugfs(void);
extern const struct lm_lockops gfs2_dlm_ops;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index e10e0b0a7cd5..cdf07b408f54 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -853,9 +853,6 @@ struct gfs2_sbd {
unsigned long sd_last_warning;
struct dentry *debugfs_dir; /* debugfs directory */
- struct dentry *debugfs_dentry_glocks;
- struct dentry *debugfs_dentry_glstats;
- struct dentry *debugfs_dentry_sbstats;
};
static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index c7603063f861..136484ef35d3 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -178,16 +178,12 @@ static int __init init_gfs2_fs(void)
if (!gfs2_page_pool)
goto fail_mempool;
- error = gfs2_register_debugfs();
- if (error)
- goto fail_debugfs;
+ gfs2_register_debugfs();
pr_info("GFS2 installed\n");
return 0;
-fail_debugfs:
- mempool_destroy(gfs2_page_pool);
fail_mempool:
destroy_workqueue(gfs2_freeze_wq);
fail_wq3:
--
2.20.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Cluster-devel] [PATCH] gfs: no need to check return value of debugfs_create functions
@ 2019-01-22 15:21 ` Greg Kroah-Hartman
0 siblings, 0 replies; 4+ messages in thread
From: Greg Kroah-Hartman @ 2019-01-22 15:21 UTC (permalink / raw)
To: cluster-devel.redhat.com
When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
There is no need to save the dentries for the debugfs files, so drop
those variables to save a bit of space and make the code simpler.
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: cluster-devel at redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/gfs2/glock.c | 70 ++++++++++--------------------------------------
fs/gfs2/glock.h | 4 +--
fs/gfs2/incore.h | 3 ---
fs/gfs2/main.c | 6 +----
4 files changed, 17 insertions(+), 66 deletions(-)
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index b92740edc416..f66773c71bcd 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -2131,71 +2131,29 @@ static const struct file_operations gfs2_sbstats_fops = {
.release = seq_release,
};
-int gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
-{
- struct dentry *dent;
-
- dent = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dir = dent;
-
- dent = debugfs_create_file("glocks",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_glocks_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_glocks = dent;
-
- dent = debugfs_create_file("glstats",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_glstats_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_glstats = dent;
-
- dent = debugfs_create_file("sbstats",
- S_IFREG | S_IRUGO,
- sdp->debugfs_dir, sdp,
- &gfs2_sbstats_fops);
- if (IS_ERR_OR_NULL(dent))
- goto fail;
- sdp->debugfs_dentry_sbstats = dent;
+void gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
+{
+ sdp->debugfs_dir = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
- return 0;
-fail:
- gfs2_delete_debugfs_file(sdp);
- return dent ? PTR_ERR(dent) : -ENOMEM;
+ debugfs_create_file("glocks", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_glocks_fops);
+
+ debugfs_create_file("glstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_glstats_fops);
+
+ debugfs_create_file("sbstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+ &gfs2_sbstats_fops);
}
void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp)
{
- if (sdp->debugfs_dir) {
- if (sdp->debugfs_dentry_glocks) {
- debugfs_remove(sdp->debugfs_dentry_glocks);
- sdp->debugfs_dentry_glocks = NULL;
- }
- if (sdp->debugfs_dentry_glstats) {
- debugfs_remove(sdp->debugfs_dentry_glstats);
- sdp->debugfs_dentry_glstats = NULL;
- }
- if (sdp->debugfs_dentry_sbstats) {
- debugfs_remove(sdp->debugfs_dentry_sbstats);
- sdp->debugfs_dentry_sbstats = NULL;
- }
- debugfs_remove(sdp->debugfs_dir);
- sdp->debugfs_dir = NULL;
- }
+ debugfs_remove_recursive(sdp->debugfs_dir);
+ sdp->debugfs_dir = NULL;
}
-int gfs2_register_debugfs(void)
+void gfs2_register_debugfs(void)
{
gfs2_root = debugfs_create_dir("gfs2", NULL);
- if (IS_ERR(gfs2_root))
- return PTR_ERR(gfs2_root);
- return gfs2_root ? 0 : -ENOMEM;
}
void gfs2_unregister_debugfs(void)
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 8949bf28b249..936b3295839c 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -243,9 +243,9 @@ extern void gfs2_glock_free(struct gfs2_glock *gl);
extern int __init gfs2_glock_init(void);
extern void gfs2_glock_exit(void);
-extern int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
+extern void gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
-extern int gfs2_register_debugfs(void);
+extern void gfs2_register_debugfs(void);
extern void gfs2_unregister_debugfs(void);
extern const struct lm_lockops gfs2_dlm_ops;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index e10e0b0a7cd5..cdf07b408f54 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -853,9 +853,6 @@ struct gfs2_sbd {
unsigned long sd_last_warning;
struct dentry *debugfs_dir; /* debugfs directory */
- struct dentry *debugfs_dentry_glocks;
- struct dentry *debugfs_dentry_glstats;
- struct dentry *debugfs_dentry_sbstats;
};
static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index c7603063f861..136484ef35d3 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -178,16 +178,12 @@ static int __init init_gfs2_fs(void)
if (!gfs2_page_pool)
goto fail_mempool;
- error = gfs2_register_debugfs();
- if (error)
- goto fail_debugfs;
+ gfs2_register_debugfs();
pr_info("GFS2 installed\n");
return 0;
-fail_debugfs:
- mempool_destroy(gfs2_page_pool);
fail_mempool:
destroy_workqueue(gfs2_freeze_wq);
fail_wq3:
--
2.20.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] gfs: no need to check return value of debugfs_create functions
2019-01-22 15:21 ` [Cluster-devel] " Greg Kroah-Hartman
@ 2019-01-23 11:35 ` Andreas Gruenbacher
-1 siblings, 0 replies; 4+ messages in thread
From: Andreas Gruenbacher @ 2019-01-23 11:35 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: LKML, Bob Peterson, cluster-devel
Greg,
On Tue, 22 Jan 2019 at 16:24, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> When calling debugfs functions, there is no need to ever check the
> return value. The function can work or not, but the code logic should
> never do something different based on this.
>
> There is no need to save the dentries for the debugfs files, so drop
> those variables to save a bit of space and make the code simpler.
looking good, pushed to for-next.
Thanks,
Andreas
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Cluster-devel] [PATCH] gfs: no need to check return value of debugfs_create functions
@ 2019-01-23 11:35 ` Andreas Gruenbacher
0 siblings, 0 replies; 4+ messages in thread
From: Andreas Gruenbacher @ 2019-01-23 11:35 UTC (permalink / raw)
To: cluster-devel.redhat.com
Greg,
On Tue, 22 Jan 2019 at 16:24, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> When calling debugfs functions, there is no need to ever check the
> return value. The function can work or not, but the code logic should
> never do something different based on this.
>
> There is no need to save the dentries for the debugfs files, so drop
> those variables to save a bit of space and make the code simpler.
looking good, pushed to for-next.
Thanks,
Andreas
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-01-23 11:35 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2019-01-22 15:21 [PATCH] gfs: no need to check return value of debugfs_create functions Greg Kroah-Hartman
2019-01-22 15:21 ` [Cluster-devel] " Greg Kroah-Hartman
2019-01-23 11:35 ` Andreas Gruenbacher
2019-01-23 11:35 ` [Cluster-devel] " Andreas Gruenbacher
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