3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #define FSCACHE_DEBUG_LEVEL THREAD
13 #include <linux/module.h>
14 #include <linux/proc_fs.h>
15 #include <linux/seq_file.h>
21 atomic_t fscache_n_op_pend;
22 atomic_t fscache_n_op_run;
23 atomic_t fscache_n_op_enqueue;
24 atomic_t fscache_n_op_requeue;
25 atomic_t fscache_n_op_deferred_release;
26 atomic_t fscache_n_op_release;
27 atomic_t fscache_n_op_gc;
28 atomic_t fscache_n_op_cancelled;
29 atomic_t fscache_n_op_rejected;
31 atomic_t fscache_n_attr_changed;
32 atomic_t fscache_n_attr_changed_ok;
33 atomic_t fscache_n_attr_changed_nobufs;
34 atomic_t fscache_n_attr_changed_nomem;
35 atomic_t fscache_n_attr_changed_calls;
37 atomic_t fscache_n_allocs;
38 atomic_t fscache_n_allocs_ok;
39 atomic_t fscache_n_allocs_wait;
40 atomic_t fscache_n_allocs_nobufs;
41 atomic_t fscache_n_allocs_intr;
42 atomic_t fscache_n_alloc_ops;
43 atomic_t fscache_n_alloc_op_waits;
45 atomic_t fscache_n_retrievals;
46 atomic_t fscache_n_retrievals_ok;
47 atomic_t fscache_n_retrievals_wait;
48 atomic_t fscache_n_retrievals_nodata;
49 atomic_t fscache_n_retrievals_nobufs;
50 atomic_t fscache_n_retrievals_intr;
51 atomic_t fscache_n_retrievals_nomem;
52 atomic_t fscache_n_retrieval_ops;
53 atomic_t fscache_n_retrieval_op_waits;
55 atomic_t fscache_n_stores;
56 atomic_t fscache_n_stores_ok;
57 atomic_t fscache_n_stores_again;
58 atomic_t fscache_n_stores_nobufs;
59 atomic_t fscache_n_stores_oom;
60 atomic_t fscache_n_store_ops;
61 atomic_t fscache_n_store_calls;
62 atomic_t fscache_n_store_pages;
63 atomic_t fscache_n_store_radix_deletes;
64 atomic_t fscache_n_store_pages_over_limit;
66 atomic_t fscache_n_marks;
67 atomic_t fscache_n_uncaches;
69 atomic_t fscache_n_acquires;
70 atomic_t fscache_n_acquires_null;
71 atomic_t fscache_n_acquires_no_cache;
72 atomic_t fscache_n_acquires_ok;
73 atomic_t fscache_n_acquires_nobufs;
74 atomic_t fscache_n_acquires_oom;
76 atomic_t fscache_n_updates;
77 atomic_t fscache_n_updates_null;
78 atomic_t fscache_n_updates_run;
80 atomic_t fscache_n_relinquishes;
81 atomic_t fscache_n_relinquishes_null;
82 atomic_t fscache_n_relinquishes_waitcrt;
84 atomic_t fscache_n_cookie_index;
85 atomic_t fscache_n_cookie_data;
86 atomic_t fscache_n_cookie_special;
88 atomic_t fscache_n_object_alloc;
89 atomic_t fscache_n_object_no_alloc;
90 atomic_t fscache_n_object_lookups;
91 atomic_t fscache_n_object_lookups_negative;
92 atomic_t fscache_n_object_lookups_positive;
93 atomic_t fscache_n_object_created;
94 atomic_t fscache_n_object_avail;
95 atomic_t fscache_n_object_dead;
97 atomic_t fscache_n_checkaux_none;
98 atomic_t fscache_n_checkaux_okay;
99 atomic_t fscache_n_checkaux_update;
100 atomic_t fscache_n_checkaux_obsolete;
102 atomic_t fscache_n_cop_alloc_object;
103 atomic_t fscache_n_cop_lookup_object;
104 atomic_t fscache_n_cop_lookup_complete;
105 atomic_t fscache_n_cop_grab_object;
106 atomic_t fscache_n_cop_update_object;
107 atomic_t fscache_n_cop_drop_object;
108 atomic_t fscache_n_cop_put_object;
109 atomic_t fscache_n_cop_sync_cache;
110 atomic_t fscache_n_cop_attr_changed;
111 atomic_t fscache_n_cop_read_or_alloc_page;
112 atomic_t fscache_n_cop_read_or_alloc_pages;
113 atomic_t fscache_n_cop_allocate_page;
114 atomic_t fscache_n_cop_allocate_pages;
115 atomic_t fscache_n_cop_write_page;
116 atomic_t fscache_n_cop_uncache_page;
117 atomic_t fscache_n_cop_dissociate_pages;
120 * display the general statistics
122 static int fscache_stats_show(struct seq_file *m, void *v)
124 seq_puts(m, "FS-Cache statistics\n");
126 seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n",
127 atomic_read(&fscache_n_cookie_index),
128 atomic_read(&fscache_n_cookie_data),
129 atomic_read(&fscache_n_cookie_special));
131 seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
132 atomic_read(&fscache_n_object_alloc),
133 atomic_read(&fscache_n_object_no_alloc),
134 atomic_read(&fscache_n_object_avail),
135 atomic_read(&fscache_n_object_dead));
136 seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
137 atomic_read(&fscache_n_checkaux_none),
138 atomic_read(&fscache_n_checkaux_okay),
139 atomic_read(&fscache_n_checkaux_update),
140 atomic_read(&fscache_n_checkaux_obsolete));
142 seq_printf(m, "Pages : mrk=%u unc=%u\n",
143 atomic_read(&fscache_n_marks),
144 atomic_read(&fscache_n_uncaches));
146 seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
148 atomic_read(&fscache_n_acquires),
149 atomic_read(&fscache_n_acquires_null),
150 atomic_read(&fscache_n_acquires_no_cache),
151 atomic_read(&fscache_n_acquires_ok),
152 atomic_read(&fscache_n_acquires_nobufs),
153 atomic_read(&fscache_n_acquires_oom));
155 seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u\n",
156 atomic_read(&fscache_n_object_lookups),
157 atomic_read(&fscache_n_object_lookups_negative),
158 atomic_read(&fscache_n_object_lookups_positive),
159 atomic_read(&fscache_n_object_created));
161 seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
162 atomic_read(&fscache_n_updates),
163 atomic_read(&fscache_n_updates_null),
164 atomic_read(&fscache_n_updates_run));
166 seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u\n",
167 atomic_read(&fscache_n_relinquishes),
168 atomic_read(&fscache_n_relinquishes_null),
169 atomic_read(&fscache_n_relinquishes_waitcrt));
171 seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
172 atomic_read(&fscache_n_attr_changed),
173 atomic_read(&fscache_n_attr_changed_ok),
174 atomic_read(&fscache_n_attr_changed_nobufs),
175 atomic_read(&fscache_n_attr_changed_nomem),
176 atomic_read(&fscache_n_attr_changed_calls));
178 seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
179 atomic_read(&fscache_n_allocs),
180 atomic_read(&fscache_n_allocs_ok),
181 atomic_read(&fscache_n_allocs_wait),
182 atomic_read(&fscache_n_allocs_nobufs),
183 atomic_read(&fscache_n_allocs_intr));
184 seq_printf(m, "Allocs : ops=%u owt=%u\n",
185 atomic_read(&fscache_n_alloc_ops),
186 atomic_read(&fscache_n_alloc_op_waits));
188 seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
190 atomic_read(&fscache_n_retrievals),
191 atomic_read(&fscache_n_retrievals_ok),
192 atomic_read(&fscache_n_retrievals_wait),
193 atomic_read(&fscache_n_retrievals_nodata),
194 atomic_read(&fscache_n_retrievals_nobufs),
195 atomic_read(&fscache_n_retrievals_intr),
196 atomic_read(&fscache_n_retrievals_nomem));
197 seq_printf(m, "Retrvls: ops=%u owt=%u\n",
198 atomic_read(&fscache_n_retrieval_ops),
199 atomic_read(&fscache_n_retrieval_op_waits));
201 seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
202 atomic_read(&fscache_n_stores),
203 atomic_read(&fscache_n_stores_ok),
204 atomic_read(&fscache_n_stores_again),
205 atomic_read(&fscache_n_stores_nobufs),
206 atomic_read(&fscache_n_stores_oom));
207 seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
208 atomic_read(&fscache_n_store_ops),
209 atomic_read(&fscache_n_store_calls),
210 atomic_read(&fscache_n_store_pages),
211 atomic_read(&fscache_n_store_radix_deletes),
212 atomic_read(&fscache_n_store_pages_over_limit));
214 seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
215 atomic_read(&fscache_n_op_pend),
216 atomic_read(&fscache_n_op_run),
217 atomic_read(&fscache_n_op_enqueue),
218 atomic_read(&fscache_n_op_cancelled),
219 atomic_read(&fscache_n_op_rejected));
220 seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n",
221 atomic_read(&fscache_n_op_deferred_release),
222 atomic_read(&fscache_n_op_release),
223 atomic_read(&fscache_n_op_gc));
225 seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
226 atomic_read(&fscache_n_cop_alloc_object),
227 atomic_read(&fscache_n_cop_lookup_object),
228 atomic_read(&fscache_n_cop_lookup_complete),
229 atomic_read(&fscache_n_cop_grab_object));
230 seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n",
231 atomic_read(&fscache_n_cop_update_object),
232 atomic_read(&fscache_n_cop_drop_object),
233 atomic_read(&fscache_n_cop_put_object),
234 atomic_read(&fscache_n_cop_attr_changed),
235 atomic_read(&fscache_n_cop_sync_cache));
236 seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
237 atomic_read(&fscache_n_cop_read_or_alloc_page),
238 atomic_read(&fscache_n_cop_read_or_alloc_pages),
239 atomic_read(&fscache_n_cop_allocate_page),
240 atomic_read(&fscache_n_cop_allocate_pages),
241 atomic_read(&fscache_n_cop_write_page),
242 atomic_read(&fscache_n_cop_uncache_page),
243 atomic_read(&fscache_n_cop_dissociate_pages));
248 * open "/proc/fs/fscache/stats" allowing provision of a statistical summary
250 static int fscache_stats_open(struct inode *inode, struct file *file)
252 return single_open(file, fscache_stats_show, NULL);
255 const struct file_operations fscache_stats_fops = {
256 .owner = THIS_MODULE,
257 .open = fscache_stats_open,
260 .release = seq_release,