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nfs: new tracepoint in nfs_delegation_need_return

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Add a tracepoint in the function that decides whether to return a
delegation to the server.

Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20250618-nfs-tracepoints-v2-3-540c9fb48da2@kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Jeff Layton
2025-06-18 09:19:14 -04:00
committed by Trond Myklebust
parent 0139a30ada
commit 5dd03d14b3
2 changed files with 49 additions and 0 deletions
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2
fs/nfs/delegation.c
View File

@@ -594,6 +594,8 @@ static bool nfs_delegation_need_return(struct nfs_delegation *delegation)
{
bool ret = false;
trace_nfs_delegation_need_return(delegation);
if (test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags))
ret = true;
if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags) ||

47
fs/nfs/nfs4trace.h
View File

@@ -14,6 +14,8 @@
#include <trace/misc/fs.h>
#include <trace/misc/nfs.h>
#include "delegation.h"
#define show_nfs_fattr_flags(valid) \
__print_flags((unsigned long)valid, "|", \
{ NFS_ATTR_FATTR_TYPE, "TYPE" }, \
@@ -985,6 +987,51 @@ DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_set_delegation);
DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_reclaim_delegation);
DEFINE_NFS4_SET_DELEGATION_EVENT(nfs4_detach_delegation);
#define show_delegation_flags(flags) \
__print_flags(flags, "|", \
{ BIT(NFS_DELEGATION_NEED_RECLAIM), "NEED_RECLAIM" }, \
{ BIT(NFS_DELEGATION_RETURN), "RETURN" }, \
{ BIT(NFS_DELEGATION_RETURN_IF_CLOSED), "RETURN_IF_CLOSED" }, \
{ BIT(NFS_DELEGATION_REFERENCED), "REFERENCED" }, \
{ BIT(NFS_DELEGATION_RETURNING), "RETURNING" }, \
{ BIT(NFS_DELEGATION_REVOKED), "REVOKED" }, \
{ BIT(NFS_DELEGATION_TEST_EXPIRED), "TEST_EXPIRED" }, \
{ BIT(NFS_DELEGATION_INODE_FREEING), "INODE_FREEING" }, \
{ BIT(NFS_DELEGATION_RETURN_DELAYED), "RETURN_DELAYED" })
DECLARE_EVENT_CLASS(nfs4_delegation_event,
TP_PROTO(
const struct nfs_delegation *delegation
),
TP_ARGS(delegation),
TP_STRUCT__entry(
__field(u32, fhandle)
__field(unsigned int, fmode)
__field(unsigned long, flags)
),
TP_fast_assign(
__entry->fhandle = nfs_fhandle_hash(NFS_FH(delegation->inode));
__entry->fmode = delegation->type;
__entry->flags = delegation->flags;
),
TP_printk(
"fhandle=0x%08x fmode=%s flags=%s",
__entry->fhandle, show_fs_fmode_flags(__entry->fmode),
show_delegation_flags(__entry->flags)
)
);
#define DEFINE_NFS4_DELEGATION_EVENT(name) \
DEFINE_EVENT(nfs4_delegation_event, name, \
TP_PROTO( \
const struct nfs_delegation *delegation \
), \
TP_ARGS(delegation))
DEFINE_NFS4_DELEGATION_EVENT(nfs_delegation_need_return);
TRACE_EVENT(nfs4_delegreturn_exit,
TP_PROTO(
const struct nfs4_delegreturnargs *args,