Gang He
2019-May-05 10:13 UTC
[Ocfs2-devel] [PATCH V3 2/2] ocfs2: add locking filter debugfs file
Add locking filter debugfs file, which is used to filter lock
resources dump from locking_state debugfs file.
We use d_filter_secs field to filter lock resources dump,
the default d_filter_secs(0) value filters nothing,
otherwise, only dump the last N seconds active lock resources.
This enhancement can avoid dumping lots of old records.
The d_filter_secs value can be changed via locking_filter file.
Compared with v2, ocfs2_dlm_init_debug() returns directly with
error when creating locking filter debugfs file is failed, since
ocfs2_dlm_shutdown_debug() will handle this failure perfectly.
Compared with v1, the main change is to add CONFIG_OCFS2_FS_STATS
macro definition judgment.
Signed-off-by: Gang He <ghe at suse.com>
---
fs/ocfs2/dlmglue.c | 36 ++++++++++++++++++++++++++++++++++++
fs/ocfs2/ocfs2.h | 2 ++
2 files changed, 38 insertions(+)
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index dccf4136f8c1..fbe4562cf4fe 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3006,6 +3006,8 @@ struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void)
kref_init(&dlm_debug->d_refcnt);
INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking);
dlm_debug->d_locking_state = NULL;
+ dlm_debug->d_locking_filter = NULL;
+ dlm_debug->d_filter_secs = 0;
out:
return dlm_debug;
}
@@ -3104,11 +3106,33 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void
*v)
{
int i;
char *lvb;
+ u32 now, last = 0;
struct ocfs2_lock_res *lockres = v;
+ struct ocfs2_dlm_debug *dlm_debug + ((struct ocfs2_dlm_seq_priv
*)m->private)->p_dlm_debug;
if (!lockres)
return -EINVAL;
+ if (dlm_debug->d_filter_secs) {
+ now = ktime_to_timespec(ktime_get()).tv_sec;
+#ifdef CONFIG_OCFS2_FS_STATS
+ if (lockres->l_lock_prmode.ls_last >
+ lockres->l_lock_exmode.ls_last)
+ last = lockres->l_lock_prmode.ls_last;
+ else
+ last = lockres->l_lock_exmode.ls_last;
+#endif
+ /*
+ * Use d_filter_secs field to filter lock resources dump,
+ * the default d_filter_secs(0) value filters nothing,
+ * otherwise, only dump the last N seconds active lock
+ * resources.
+ */
+ if ((now - last) > dlm_debug->d_filter_secs)
+ return 0;
+ }
+
seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION);
if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY)
@@ -3258,6 +3282,17 @@ static int ocfs2_dlm_init_debug(struct ocfs2_super *osb)
goto out;
}
+ dlm_debug->d_locking_filter =
debugfs_create_u32("locking_filter",
+ 0600,
+ osb->osb_debug_root,
+ &dlm_debug->d_filter_secs);
+ if (!dlm_debug->d_locking_filter) {
+ ret = -EINVAL;
+ mlog(ML_ERROR,
+ "Unable to create locking filter debugfs file.\n");
+ goto out;
+ }
+
ocfs2_get_dlm_debug(dlm_debug);
out:
return ret;
@@ -3269,6 +3304,7 @@ static void ocfs2_dlm_shutdown_debug(struct ocfs2_super
*osb)
if (dlm_debug) {
debugfs_remove(dlm_debug->d_locking_state);
+ debugfs_remove(dlm_debug->d_locking_filter);
ocfs2_put_dlm_debug(dlm_debug);
}
}
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 8efa022684f4..f4da51099889 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -237,6 +237,8 @@ struct ocfs2_orphan_scan {
struct ocfs2_dlm_debug {
struct kref d_refcnt;
struct dentry *d_locking_state;
+ struct dentry *d_locking_filter;
+ u32 d_filter_secs;
struct list_head d_lockres_tracking;
};
--
2.21.0
Joseph Qi
2019-May-05 11:00 UTC
[Ocfs2-devel] [PATCH V3 2/2] ocfs2: add locking filter debugfs file
On 19/5/5 18:13, Gang He wrote:> Add locking filter debugfs file, which is used to filter lock > resources dump from locking_state debugfs file. > We use d_filter_secs field to filter lock resources dump, > the default d_filter_secs(0) value filters nothing, > otherwise, only dump the last N seconds active lock resources. > This enhancement can avoid dumping lots of old records. > The d_filter_secs value can be changed via locking_filter file. > > Compared with v2, ocfs2_dlm_init_debug() returns directly with > error when creating locking filter debugfs file is failed, since > ocfs2_dlm_shutdown_debug() will handle this failure perfectly. > Compared with v1, the main change is to add CONFIG_OCFS2_FS_STATS > macro definition judgment. > > Signed-off-by: Gang He <ghe at suse.com>Reviewed-by: Joseph Qi <joseph.qi at linux.alibaba.com>> --- > fs/ocfs2/dlmglue.c | 36 ++++++++++++++++++++++++++++++++++++ > fs/ocfs2/ocfs2.h | 2 ++ > 2 files changed, 38 insertions(+) > > diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c > index dccf4136f8c1..fbe4562cf4fe 100644 > --- a/fs/ocfs2/dlmglue.c > +++ b/fs/ocfs2/dlmglue.c > @@ -3006,6 +3006,8 @@ struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void) > kref_init(&dlm_debug->d_refcnt); > INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking); > dlm_debug->d_locking_state = NULL; > + dlm_debug->d_locking_filter = NULL; > + dlm_debug->d_filter_secs = 0; > out: > return dlm_debug; > } > @@ -3104,11 +3106,33 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v) > { > int i; > char *lvb; > + u32 now, last = 0; > struct ocfs2_lock_res *lockres = v; > + struct ocfs2_dlm_debug *dlm_debug > + ((struct ocfs2_dlm_seq_priv *)m->private)->p_dlm_debug; > > if (!lockres) > return -EINVAL; > > + if (dlm_debug->d_filter_secs) { > + now = ktime_to_timespec(ktime_get()).tv_sec; > +#ifdef CONFIG_OCFS2_FS_STATS > + if (lockres->l_lock_prmode.ls_last > > + lockres->l_lock_exmode.ls_last) > + last = lockres->l_lock_prmode.ls_last; > + else > + last = lockres->l_lock_exmode.ls_last; > +#endif > + /* > + * Use d_filter_secs field to filter lock resources dump, > + * the default d_filter_secs(0) value filters nothing, > + * otherwise, only dump the last N seconds active lock > + * resources. > + */ > + if ((now - last) > dlm_debug->d_filter_secs) > + return 0; > + } > + > seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION); > > if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY) > @@ -3258,6 +3282,17 @@ static int ocfs2_dlm_init_debug(struct ocfs2_super *osb) > goto out; > } > > + dlm_debug->d_locking_filter = debugfs_create_u32("locking_filter", > + 0600, > + osb->osb_debug_root, > + &dlm_debug->d_filter_secs); > + if (!dlm_debug->d_locking_filter) { > + ret = -EINVAL; > + mlog(ML_ERROR, > + "Unable to create locking filter debugfs file.\n"); > + goto out; > + } > + > ocfs2_get_dlm_debug(dlm_debug); > out: > return ret; > @@ -3269,6 +3304,7 @@ static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb) > > if (dlm_debug) { > debugfs_remove(dlm_debug->d_locking_state); > + debugfs_remove(dlm_debug->d_locking_filter); > ocfs2_put_dlm_debug(dlm_debug); > } > } > diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h > index 8efa022684f4..f4da51099889 100644 > --- a/fs/ocfs2/ocfs2.h > +++ b/fs/ocfs2/ocfs2.h > @@ -237,6 +237,8 @@ struct ocfs2_orphan_scan { > struct ocfs2_dlm_debug { > struct kref d_refcnt; > struct dentry *d_locking_state; > + struct dentry *d_locking_filter; > + u32 d_filter_secs; > struct list_head d_lockres_tracking; > }; > >