afs: Add tracing for cell refcount and active user count

Add a tracepoint to log the cell refcount and active user count and pass in
a reason code through various functions that manipulate these counters.

Additionally, a helper function, afs_see_cell(), is provided to log
interesting places that deal with a cell without actually doing any
accounting directly.

Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 5f0c1cf1ea13..a79c5ca376b3 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -50,6 +50,7 @@ enum afs_server_trace {
 	afs_server_trace_update,
 };
 
+
 enum afs_volume_trace {
 	afs_volume_trace_alloc,
 	afs_volume_trace_free,
@@ -67,6 +68,46 @@ enum afs_volume_trace {
 	afs_volume_trace_remove,
 };
 
+enum afs_cell_trace {
+	afs_cell_trace_alloc,
+	afs_cell_trace_free,
+	afs_cell_trace_get_queue_dns,
+	afs_cell_trace_get_queue_manage,
+	afs_cell_trace_get_queue_new,
+	afs_cell_trace_get_vol,
+	afs_cell_trace_insert,
+	afs_cell_trace_manage,
+	afs_cell_trace_put_candidate,
+	afs_cell_trace_put_destroy,
+	afs_cell_trace_put_queue_fail,
+	afs_cell_trace_put_queue_work,
+	afs_cell_trace_put_vol,
+	afs_cell_trace_see_source,
+	afs_cell_trace_see_ws,
+	afs_cell_trace_unuse_alias,
+	afs_cell_trace_unuse_check_alias,
+	afs_cell_trace_unuse_delete,
+	afs_cell_trace_unuse_fc,
+	afs_cell_trace_unuse_lookup,
+	afs_cell_trace_unuse_mntpt,
+	afs_cell_trace_unuse_no_pin,
+	afs_cell_trace_unuse_parse,
+	afs_cell_trace_unuse_pin,
+	afs_cell_trace_unuse_probe,
+	afs_cell_trace_unuse_sbi,
+	afs_cell_trace_unuse_ws,
+	afs_cell_trace_use_alias,
+	afs_cell_trace_use_check_alias,
+	afs_cell_trace_use_fc,
+	afs_cell_trace_use_fc_alias,
+	afs_cell_trace_use_lookup,
+	afs_cell_trace_use_mntpt,
+	afs_cell_trace_use_pin,
+	afs_cell_trace_use_probe,
+	afs_cell_trace_use_sbi,
+	afs_cell_trace_wait,
+};
+
 enum afs_fs_operation {
 	afs_FS_FetchData		= 130,	/* AFS Fetch file data */
 	afs_FS_FetchACL			= 131,	/* AFS Fetch file ACL */
@@ -295,6 +336,44 @@ enum afs_cb_break_reason {
 	EM(afs_volume_trace_put_validate_fc,	"PUT fc-validat") \
 	E_(afs_volume_trace_remove,		"REMOVE        ")
 
+#define afs_cell_traces \
+	EM(afs_cell_trace_alloc,		"ALLOC     ") \
+	EM(afs_cell_trace_free,			"FREE      ") \
+	EM(afs_cell_trace_get_queue_dns,	"GET q-dns ") \
+	EM(afs_cell_trace_get_queue_manage,	"GET q-mng ") \
+	EM(afs_cell_trace_get_queue_new,	"GET q-new ") \
+	EM(afs_cell_trace_get_vol,		"GET vol   ") \
+	EM(afs_cell_trace_insert,		"INSERT    ") \
+	EM(afs_cell_trace_manage,		"MANAGE    ") \
+	EM(afs_cell_trace_put_candidate,	"PUT candid") \
+	EM(afs_cell_trace_put_destroy,		"PUT destry") \
+	EM(afs_cell_trace_put_queue_work,	"PUT q-work") \
+	EM(afs_cell_trace_put_queue_fail,	"PUT q-fail") \
+	EM(afs_cell_trace_put_vol,		"PUT vol   ") \
+	EM(afs_cell_trace_see_source,		"SEE source") \
+	EM(afs_cell_trace_see_ws,		"SEE ws    ") \
+	EM(afs_cell_trace_unuse_alias,		"UNU alias ") \
+	EM(afs_cell_trace_unuse_check_alias,	"UNU chk-al") \
+	EM(afs_cell_trace_unuse_delete,		"UNU delete") \
+	EM(afs_cell_trace_unuse_fc,		"UNU fc    ") \
+	EM(afs_cell_trace_unuse_lookup,		"UNU lookup") \
+	EM(afs_cell_trace_unuse_mntpt,		"UNU mntpt ") \
+	EM(afs_cell_trace_unuse_parse,		"UNU parse ") \
+	EM(afs_cell_trace_unuse_pin,		"UNU pin   ") \
+	EM(afs_cell_trace_unuse_probe,		"UNU probe ") \
+	EM(afs_cell_trace_unuse_sbi,		"UNU sbi   ") \
+	EM(afs_cell_trace_unuse_ws,		"UNU ws    ") \
+	EM(afs_cell_trace_use_alias,		"USE alias ") \
+	EM(afs_cell_trace_use_check_alias,	"USE chk-al") \
+	EM(afs_cell_trace_use_fc,		"USE fc    ") \
+	EM(afs_cell_trace_use_fc_alias,		"USE fc-al ") \
+	EM(afs_cell_trace_use_lookup,		"USE lookup") \
+	EM(afs_cell_trace_use_mntpt,		"USE mntpt ") \
+	EM(afs_cell_trace_use_pin,		"USE pin   ") \
+	EM(afs_cell_trace_use_probe,		"USE probe ") \
+	EM(afs_cell_trace_use_sbi,		"USE sbi   ") \
+	E_(afs_cell_trace_wait,			"WAIT      ")
+
 #define afs_fs_operations \
 	EM(afs_FS_FetchData,			"FS.FetchData") \
 	EM(afs_FS_FetchStatus,			"FS.FetchStatus") \
@@ -483,6 +562,7 @@ enum afs_cb_break_reason {
 
 afs_call_traces;
 afs_server_traces;
+afs_cell_traces;
 afs_fs_operations;
 afs_vl_operations;
 afs_edit_dir_ops;
@@ -1358,6 +1438,33 @@ TRACE_EVENT(afs_volume,
 		      __entry->ref)
 	    );
 
+TRACE_EVENT(afs_cell,
+	    TP_PROTO(unsigned int cell_debug_id, int usage, int active,
+		     enum afs_cell_trace reason),
+
+	    TP_ARGS(cell_debug_id, usage, active, reason),
+
+	    TP_STRUCT__entry(
+		    __field(unsigned int,		cell		)
+		    __field(int,			usage		)
+		    __field(int,			active		)
+		    __field(int,			reason		)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->cell = cell_debug_id;
+		    __entry->usage = usage;
+		    __entry->active = active;
+		    __entry->reason = reason;
+			   ),
+
+	    TP_printk("L=%08x %s u=%d a=%d",
+		      __entry->cell,
+		      __print_symbolic(__entry->reason, afs_cell_traces),
+		      __entry->usage,
+		      __entry->active)
+	    );
+
 #endif /* _TRACE_AFS_H */
 
 /* This part must be outside protection */