Add a tracepoint in the function that decides whether to return a delegation to the server. Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> --- fs/nfs/delegation.c | 2 ++ fs/nfs/nfs4trace.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+) diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index a331a2dbae12..88dbec4739d3 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -571,6 +571,8 @@ 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; else if (test_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags)) { diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index b4ebac1961cc..e5adfb755dc7 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -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" }, \ @@ -928,6 +930,51 @@ 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, -- 2.44.0