mirrors/scoutfs
1
0
Fork 0
mirror of https://github.com/versity/scoutfs.git synced 2026-02-07 19:20:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

scoutfs: add d_revalidate trace

Browse Source 
Add a trace event to get some visibility into dentry revalidation.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2018-03-08 10:03:47 -08:00
committed by Zach Brown
parent 2136a973ed
commit 951b6d8dcd
2 changed files with 46 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
kmod/src/dir.c
View File

@@ -269,9 +269,10 @@ static int scoutfs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct super_block *sb = dentry->d_sb;
struct dentry_info *di = dentry->d_fsdata;
struct dentry *parent = dget_parent(dentry);
struct scoutfs_lock *lock = NULL;
struct scoutfs_dirent dent;
struct dentry *parent = NULL;
bool is_covered = false;
struct inode *dir;
u64 dentry_ino;
int ret;
@@ -300,13 +301,13 @@ static int scoutfs_d_revalidate(struct dentry *dentry, unsigned int flags)
goto out;
}
if (scoutfs_lock_is_covered(sb, &di->lock_cov)) {
is_covered = scoutfs_lock_is_covered(sb, &di->lock_cov);
if (is_covered) {
scoutfs_inc_counter(sb, dentry_revalidate_locked);
ret = 1;
goto out;
}
parent = dget_parent(dentry);
if (!parent || !parent->d_inode) {
scoutfs_inc_counter(sb, dentry_revalidate_orphan);
ret = 0;
@@ -338,6 +339,8 @@ static int scoutfs_d_revalidate(struct dentry *dentry, unsigned int flags)
}
out:
trace_scoutfs_d_revalidate(sb, dentry, flags, parent, is_covered, ret);
dput(parent);
scoutfs_unlock(sb, lock, DLM_LOCK_PR);

40
kmod/src/scoutfs_trace.h
View File

@@ -36,6 +36,7 @@
#include "count.h"
#include "bio.h"
#include "export.h"
#include "dir.h"
struct lock_info;
@@ -1887,6 +1888,45 @@ TRACE_EVENT(scoutfs_rename,
__entry->new_inode_ino)
);
TRACE_EVENT(scoutfs_d_revalidate,
TP_PROTO(struct super_block *sb,
struct dentry *dentry, int flags, struct dentry *parent,
bool is_covered, int ret),
TP_ARGS(sb, dentry, flags, parent, is_covered, ret),
TP_STRUCT__entry(
__field(__u64, fsid)
__string(name, dentry->d_name.name)
__field(__u64, ino)
__field(__u64, parent_ino)
__field(int, flags)
__field(int, is_root)
__field(int, is_covered)
__field(int, ret)
),
TP_fast_assign(
__entry->fsid = FSID_ARG(sb);
__assign_str(name, dentry->d_name.name)
__entry->ino = dentry->d_inode ?
scoutfs_ino(dentry->d_inode) : 0;
__entry->parent_ino = parent->d_inode ?
scoutfs_ino(parent->d_inode) : 0;
__entry->flags = flags;
__entry->is_root = IS_ROOT(dentry);
__entry->is_covered = is_covered;
__entry->ret = ret;
),
TP_printk("fsid "FSID_FMT" name %s ino %llu parent_ino %llu flags 0x%x s_root %u is_covered %u ret %d",
__entry->fsid, __get_str(name), __entry->ino,
__entry->parent_ino, __entry->flags,
__entry->is_root,
__entry->is_covered,
__entry->ret)
);
DECLARE_EVENT_CLASS(scoutfs_super_lifecycle_class,
TP_PROTO(struct super_block *sb),
TP_ARGS(sb),