static unsigned __read_mostly afs_cell_gc_delay = 10;
static unsigned __read_mostly afs_cell_min_ttl = 10 * 60;
static unsigned __read_mostly afs_cell_max_ttl = 24 * 60 * 60;
+static atomic_t cell_debug_id;
static void afs_queue_cell_manager(struct afs_net *);
static void afs_manage_cell_work(struct work_struct *);
* hold net->cells_lock at least read-locked.
*/
static struct afs_cell *afs_find_cell_locked(struct afs_net *net,
- const char *name, unsigned int namesz)
+ const char *name, unsigned int namesz,
+ enum afs_cell_trace reason)
{
struct afs_cell *cell = NULL;
struct rb_node *p;
return ERR_PTR(-ENOENT);
found:
- return afs_use_cell(cell);
+ return afs_use_cell(cell, reason);
}
/*
* Look up and get an activation reference on a cell record.
*/
struct afs_cell *afs_find_cell(struct afs_net *net,
- const char *name, unsigned int namesz)
+ const char *name, unsigned int namesz,
+ enum afs_cell_trace reason)
{
struct afs_cell *cell;
down_read(&net->cells_lock);
- cell = afs_find_cell_locked(net, name, namesz);
+ cell = afs_find_cell_locked(net, name, namesz, reason);
up_read(&net->cells_lock);
return cell;
}
cell->dns_status = vllist->status;
smp_store_release(&cell->dns_lookup_count, 1); /* vs source/status */
atomic_inc(&net->cells_outstanding);
+ cell->debug_id = atomic_inc_return(&cell_debug_id);
+ trace_afs_cell(cell->debug_id, 1, 0, afs_cell_trace_alloc);
_leave(" = %p", cell);
return cell;
_enter("%s,%s", name, vllist);
if (!excl) {
- cell = afs_find_cell(net, name, namesz);
+ cell = afs_find_cell(net, name, namesz, afs_cell_trace_use_lookup);
if (!IS_ERR(cell))
goto wait_for_cell;
}
cell = candidate;
candidate = NULL;
atomic_set(&cell->active, 2);
+ trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), 2, afs_cell_trace_insert);
rb_link_node_rcu(&cell->net_node, parent, pp);
rb_insert_color(&cell->net_node, &net->cells);
up_write(&net->cells_lock);
- afs_queue_cell(cell);
+ afs_queue_cell(cell, afs_cell_trace_get_queue_new);
wait_for_cell:
+ trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), atomic_read(&cell->active),
+ afs_cell_trace_wait);
_debug("wait_for_cell");
wait_var_event(&cell->state,
({
if (excl) {
ret = -EEXIST;
} else {
- afs_use_cell(cursor);
+ afs_use_cell(cursor, afs_cell_trace_use_lookup);
ret = 0;
}
up_write(&net->cells_lock);
if (candidate)
- afs_put_cell(candidate);
+ afs_put_cell(candidate, afs_cell_trace_put_candidate);
if (ret == 0)
goto wait_for_cell;
goto error_noput;
error:
- afs_unuse_cell(net, cell);
+ afs_unuse_cell(net, cell, afs_cell_trace_unuse_lookup);
error_noput:
_leave(" = %d [error]", ret);
return ERR_PTR(ret);
}
if (!test_and_set_bit(AFS_CELL_FL_NO_GC, &new_root->flags))
- afs_use_cell(new_root);
+ afs_use_cell(new_root, afs_cell_trace_use_pin);
/* install the new cell */
down_write(&net->cells_lock);
+ afs_see_cell(new_root, afs_cell_trace_see_ws);
old_root = net->ws_cell;
net->ws_cell = new_root;
up_write(&net->cells_lock);
- afs_unuse_cell(net, old_root);
+ afs_unuse_cell(net, old_root, afs_cell_trace_unuse_ws);
_leave(" = 0");
return 0;
}
u = atomic_read(&cell->ref);
ASSERTCMP(u, ==, 0);
+ trace_afs_cell(cell->debug_id, u, atomic_read(&cell->active), afs_cell_trace_free);
afs_put_vlserverlist(net, rcu_access_pointer(cell->vl_servers));
- afs_unuse_cell(net, cell->alias_of);
+ afs_unuse_cell(net, cell->alias_of, afs_cell_trace_unuse_alias);
key_put(cell->anonymous_key);
kfree(cell->name);
kfree(cell);
/*
* Get a reference on a cell record.
*/
-struct afs_cell *afs_get_cell(struct afs_cell *cell)
+struct afs_cell *afs_get_cell(struct afs_cell *cell, enum afs_cell_trace reason)
{
+ int u;
+
if (atomic_read(&cell->ref) <= 0)
BUG();
- atomic_inc(&cell->ref);
+ u = atomic_inc_return(&cell->ref);
+ trace_afs_cell(cell->debug_id, u, atomic_read(&cell->active), reason);
return cell;
}
/*
* Drop a reference on a cell record.
*/
-void afs_put_cell(struct afs_cell *cell)
+void afs_put_cell(struct afs_cell *cell, enum afs_cell_trace reason)
{
if (cell) {
+ unsigned int debug_id = cell->debug_id;
unsigned int u, a;
+ a = atomic_read(&cell->active);
u = atomic_dec_return(&cell->ref);
+ trace_afs_cell(debug_id, u, a, reason);
if (u == 0) {
a = atomic_read(&cell->active);
WARN(a != 0, "Cell active count %u > 0\n", a);
/*
* Note a cell becoming more active.
*/
-struct afs_cell *afs_use_cell(struct afs_cell *cell)
+struct afs_cell *afs_use_cell(struct afs_cell *cell, enum afs_cell_trace reason)
{
+ int u, a;
+
if (atomic_read(&cell->ref) <= 0)
BUG();
- atomic_inc(&cell->active);
+ u = atomic_read(&cell->ref);
+ a = atomic_inc_return(&cell->active);
+ trace_afs_cell(cell->debug_id, u, a, reason);
return cell;
}
* Record a cell becoming less active. When the active counter reaches 1, it
* is scheduled for destruction, but may get reactivated.
*/
-void afs_unuse_cell(struct afs_net *net, struct afs_cell *cell)
+void afs_unuse_cell(struct afs_net *net, struct afs_cell *cell, enum afs_cell_trace reason)
{
+ unsigned int debug_id = cell->debug_id;
time64_t now, expire_delay;
- int a;
+ int u, a;
if (!cell)
return;
if (cell->vl_servers->nr_servers)
expire_delay = afs_cell_gc_delay;
+ u = atomic_read(&cell->ref);
a = atomic_dec_return(&cell->active);
+ trace_afs_cell(debug_id, u, a, reason);
WARN_ON(a == 0);
if (a == 1)
/* 'cell' may now be garbage collected. */
}
/*
+ * Note that a cell has been seen.
+ */
+void afs_see_cell(struct afs_cell *cell, enum afs_cell_trace reason)
+{
+ int u, a;
+
+ u = atomic_read(&cell->ref);
+ a = atomic_read(&cell->active);
+ trace_afs_cell(cell->debug_id, u, a, reason);
+}
+
+/*
* Queue a cell for management, giving the workqueue a ref to hold.
*/
-void afs_queue_cell(struct afs_cell *cell)
+void afs_queue_cell(struct afs_cell *cell, enum afs_cell_trace reason)
{
- afs_get_cell(cell);
+ afs_get_cell(cell, reason);
if (!queue_work(afs_wq, &cell->manager))
- afs_put_cell(cell);
+ afs_put_cell(cell, afs_cell_trace_put_queue_fail);
}
/*
active = 1;
if (atomic_try_cmpxchg_relaxed(&cell->active, &active, 0)) {
rb_erase(&cell->net_node, &net->cells);
+ trace_afs_cell(cell->debug_id, atomic_read(&cell->ref), 0,
+ afs_cell_trace_unuse_delete);
smp_store_release(&cell->state, AFS_CELL_REMOVED);
}
up_write(&net->cells_lock);
/* The root volume is pinning the cell */
afs_put_volume(cell->net, cell->root_volume, afs_volume_trace_put_cell_root);
cell->root_volume = NULL;
- afs_put_cell(cell);
+ afs_put_cell(cell, afs_cell_trace_put_destroy);
}
static void afs_manage_cell_work(struct work_struct *work)
struct afs_cell *cell = container_of(work, struct afs_cell, manager);
afs_manage_cell(cell);
- afs_put_cell(cell);
+ afs_put_cell(cell, afs_cell_trace_put_queue_work);
}
/*
bool sched_cell = false;
active = atomic_read(&cell->active);
- _debug("manage %s %u %u", cell->name, atomic_read(&cell->ref), active);
+ trace_afs_cell(cell->debug_id, atomic_read(&cell->ref),
+ active, afs_cell_trace_manage);
ASSERTCMP(active, >=, 1);
if (purging) {
- if (test_and_clear_bit(AFS_CELL_FL_NO_GC, &cell->flags))
- atomic_dec(&cell->active);
+ if (test_and_clear_bit(AFS_CELL_FL_NO_GC, &cell->flags)) {
+ active = atomic_dec_return(&cell->active);
+ trace_afs_cell(cell->debug_id, atomic_read(&cell->ref),
+ active, afs_cell_trace_unuse_pin);
+ }
}
if (active == 1) {
}
if (sched_cell)
- afs_queue_cell(cell);
+ afs_queue_cell(cell, afs_cell_trace_get_queue_manage);
}
up_read(&net->cells_lock);
ws = net->ws_cell;
net->ws_cell = NULL;
up_write(&net->cells_lock);
- afs_unuse_cell(net, ws);
+ afs_unuse_cell(net, ws, afs_cell_trace_unuse_ws);
_debug("del timer");
if (del_timer_sync(&net->cells_timer))
len--;
}
- cell = afs_find_cell(net, name, len);
+ cell = afs_find_cell(net, name, len, afs_cell_trace_use_probe);
if (!IS_ERR(cell)) {
- afs_unuse_cell(net, cell);
+ afs_unuse_cell(net, cell, afs_cell_trace_unuse_probe);
return 0;
}
enum dns_record_source dns_source:8; /* Latest source of data from lookup */
enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
unsigned int dns_lookup_count; /* Counter of DNS lookups */
+ unsigned int debug_id;
/* The volumes belonging to this cell */
struct rb_root volumes; /* Tree of volumes on this server */
* cell.c
*/
extern int afs_cell_init(struct afs_net *, const char *);
-extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned);
+extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
+ enum afs_cell_trace);
extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
const char *, bool);
-extern struct afs_cell *afs_use_cell(struct afs_cell *);
-extern void afs_unuse_cell(struct afs_net *, struct afs_cell *);
-extern struct afs_cell *afs_get_cell(struct afs_cell *);
-extern void afs_put_cell(struct afs_cell *);
-extern void afs_queue_cell(struct afs_cell *);
+extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
+extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
+extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
+extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
+extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
+extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
extern void afs_manage_cells(struct work_struct *);
extern void afs_cells_timer(struct timer_list *);
extern void __net_exit afs_cell_purge(struct afs_net *);
ctx->force = true;
}
if (ctx->cell) {
- afs_unuse_cell(ctx->net, ctx->cell);
+ afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_mntpt);
ctx->cell = NULL;
}
if (test_bit(AFS_VNODE_PSEUDODIR, &vnode->flags)) {
char *buf;
if (src_as->cell)
- ctx->cell = afs_use_cell(src_as->cell);
+ ctx->cell = afs_use_cell(src_as->cell, afs_cell_trace_use_mntpt);
if (size < 2 || size > PAGE_SIZE - 1)
return -EINVAL;
}
if (test_and_set_bit(AFS_CELL_FL_NO_GC, &cell->flags))
- afs_unuse_cell(net, cell);
+ afs_unuse_cell(net, cell, afs_cell_trace_unuse_no_pin);
} else {
goto inval;
}
cellnamesz, cellnamesz, cellname ?: "");
return PTR_ERR(cell);
}
- afs_unuse_cell(ctx->net, ctx->cell);
+ afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_parse);
+ afs_see_cell(cell, afs_cell_trace_see_source);
ctx->cell = cell;
}
_debug("switch to alias");
key_put(ctx->key);
ctx->key = NULL;
- cell = afs_use_cell(ctx->cell->alias_of);
- afs_unuse_cell(ctx->net, ctx->cell);
+ cell = afs_use_cell(ctx->cell->alias_of,
+ afs_cell_trace_use_fc_alias);
+ afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_fc);
ctx->cell = cell;
goto reget_key;
}
if (ctx->dyn_root) {
as->dyn_root = true;
} else {
- as->cell = afs_use_cell(ctx->cell);
+ as->cell = afs_use_cell(ctx->cell, afs_cell_trace_use_sbi);
as->volume = afs_get_volume(ctx->volume,
afs_volume_trace_get_alloc_sbi);
}
if (as) {
struct afs_net *net = afs_net(as->net_ns);
afs_put_volume(net, as->volume, afs_volume_trace_put_destroy_sbi);
- afs_unuse_cell(net, as->cell);
+ afs_unuse_cell(net, as->cell, afs_cell_trace_unuse_sbi);
put_net(as->net_ns);
kfree(as);
}
afs_destroy_sbi(fc->s_fs_info);
afs_put_volume(ctx->net, ctx->volume, afs_volume_trace_put_free_fc);
- afs_unuse_cell(ctx->net, ctx->cell);
+ afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_fc);
key_put(ctx->key);
kfree(ctx);
}
ctx->net = afs_net(fc->net_ns);
/* Default to the workstation cell. */
- cell = afs_find_cell(ctx->net, NULL, 0);
+ cell = afs_find_cell(ctx->net, NULL, 0, afs_cell_trace_use_fc);
if (IS_ERR(cell))
cell = NULL;
ctx->cell = cell;
is_alias:
rcu_read_unlock();
- cell->alias_of = afs_use_cell(p);
+ cell->alias_of = afs_use_cell(p, afs_cell_trace_use_alias);
return 1;
}
continue;
if (p->root_volume)
continue; /* Ignore cells that have a root.cell volume. */
- afs_use_cell(p);
+ afs_use_cell(p, afs_cell_trace_use_check_alias);
mutex_unlock(&cell->net->proc_cells_lock);
if (afs_query_for_alias_one(cell, key, p) != 0)
goto is_alias;
if (mutex_lock_interruptible(&cell->net->proc_cells_lock) < 0) {
- afs_unuse_cell(cell->net, p);
+ afs_unuse_cell(cell->net, p, afs_cell_trace_unuse_check_alias);
return -ERESTARTSYS;
}
- afs_unuse_cell(cell->net, p);
+ afs_unuse_cell(cell->net, p, afs_cell_trace_unuse_check_alias);
}
mutex_unlock(&cell->net->proc_cells_lock);
cell->dns_expiry <= ktime_get_real_seconds()) {
dns_lookup_count = smp_load_acquire(&cell->dns_lookup_count);
set_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags);
- afs_queue_cell(cell);
+ afs_queue_cell(cell, afs_cell_trace_get_queue_dns);
if (cell->dns_source == DNS_RECORD_UNAVAILABLE) {
if (wait_var_event_interruptible(
volume->vid = vldb->vid[params->type];
volume->update_at = ktime_get_real_seconds() + afs_volume_record_life;
- volume->cell = afs_get_cell(params->cell);
+ volume->cell = afs_get_cell(params->cell, afs_cell_trace_get_vol);
volume->type = params->type;
volume->type_force = params->force;
volume->name_len = vldb->name_len;
return volume;
error_1:
- afs_put_cell(volume->cell);
+ afs_put_cell(volume->cell, afs_cell_trace_put_vol);
kfree(volume);
error_0:
return ERR_PTR(ret);
afs_remove_volume_from_cell(volume);
afs_put_serverlist(net, rcu_access_pointer(volume->servers));
- afs_put_cell(volume->cell);
+ afs_put_cell(volume->cell, afs_cell_trace_put_vol);
trace_afs_volume(volume->vid, atomic_read(&volume->usage),
afs_volume_trace_free);
kfree_rcu(volume, rcu);
afs_server_trace_update,
};
+
enum afs_volume_trace {
afs_volume_trace_alloc,
afs_volume_trace_free,
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 */
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") \
afs_call_traces;
afs_server_traces;
+afs_cell_traces;
afs_fs_operations;
afs_vl_operations;
afs_edit_dir_ops;
__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 */
projects / platform / kernel / linux-starfive.git / commitdiff