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12#define FSCACHE_DEBUG_LEVEL THREAD
13#include <linux/module.h>
14#include <linux/proc_fs.h>
15#include <linux/seq_file.h>
16#include "internal.h"
17
18
19
20
21atomic_t fscache_n_op_pend;
22atomic_t fscache_n_op_run;
23atomic_t fscache_n_op_enqueue;
24atomic_t fscache_n_op_requeue;
25atomic_t fscache_n_op_deferred_release;
26atomic_t fscache_n_op_release;
27atomic_t fscache_n_op_gc;
28atomic_t fscache_n_op_cancelled;
29atomic_t fscache_n_op_rejected;
30
31atomic_t fscache_n_attr_changed;
32atomic_t fscache_n_attr_changed_ok;
33atomic_t fscache_n_attr_changed_nobufs;
34atomic_t fscache_n_attr_changed_nomem;
35atomic_t fscache_n_attr_changed_calls;
36
37atomic_t fscache_n_allocs;
38atomic_t fscache_n_allocs_ok;
39atomic_t fscache_n_allocs_wait;
40atomic_t fscache_n_allocs_nobufs;
41atomic_t fscache_n_allocs_intr;
42atomic_t fscache_n_allocs_object_dead;
43atomic_t fscache_n_alloc_ops;
44atomic_t fscache_n_alloc_op_waits;
45
46atomic_t fscache_n_retrievals;
47atomic_t fscache_n_retrievals_ok;
48atomic_t fscache_n_retrievals_wait;
49atomic_t fscache_n_retrievals_nodata;
50atomic_t fscache_n_retrievals_nobufs;
51atomic_t fscache_n_retrievals_intr;
52atomic_t fscache_n_retrievals_nomem;
53atomic_t fscache_n_retrievals_object_dead;
54atomic_t fscache_n_retrieval_ops;
55atomic_t fscache_n_retrieval_op_waits;
56
57atomic_t fscache_n_stores;
58atomic_t fscache_n_stores_ok;
59atomic_t fscache_n_stores_again;
60atomic_t fscache_n_stores_nobufs;
61atomic_t fscache_n_stores_oom;
62atomic_t fscache_n_store_ops;
63atomic_t fscache_n_store_calls;
64atomic_t fscache_n_store_pages;
65atomic_t fscache_n_store_radix_deletes;
66atomic_t fscache_n_store_pages_over_limit;
67
68atomic_t fscache_n_store_vmscan_not_storing;
69atomic_t fscache_n_store_vmscan_gone;
70atomic_t fscache_n_store_vmscan_busy;
71atomic_t fscache_n_store_vmscan_cancelled;
72
73atomic_t fscache_n_marks;
74atomic_t fscache_n_uncaches;
75
76atomic_t fscache_n_acquires;
77atomic_t fscache_n_acquires_null;
78atomic_t fscache_n_acquires_no_cache;
79atomic_t fscache_n_acquires_ok;
80atomic_t fscache_n_acquires_nobufs;
81atomic_t fscache_n_acquires_oom;
82
83atomic_t fscache_n_updates;
84atomic_t fscache_n_updates_null;
85atomic_t fscache_n_updates_run;
86
87atomic_t fscache_n_relinquishes;
88atomic_t fscache_n_relinquishes_null;
89atomic_t fscache_n_relinquishes_waitcrt;
90atomic_t fscache_n_relinquishes_retire;
91
92atomic_t fscache_n_cookie_index;
93atomic_t fscache_n_cookie_data;
94atomic_t fscache_n_cookie_special;
95
96atomic_t fscache_n_object_alloc;
97atomic_t fscache_n_object_no_alloc;
98atomic_t fscache_n_object_lookups;
99atomic_t fscache_n_object_lookups_negative;
100atomic_t fscache_n_object_lookups_positive;
101atomic_t fscache_n_object_lookups_timed_out;
102atomic_t fscache_n_object_created;
103atomic_t fscache_n_object_avail;
104atomic_t fscache_n_object_dead;
105
106atomic_t fscache_n_checkaux_none;
107atomic_t fscache_n_checkaux_okay;
108atomic_t fscache_n_checkaux_update;
109atomic_t fscache_n_checkaux_obsolete;
110
111atomic_t fscache_n_cop_alloc_object;
112atomic_t fscache_n_cop_lookup_object;
113atomic_t fscache_n_cop_lookup_complete;
114atomic_t fscache_n_cop_grab_object;
115atomic_t fscache_n_cop_update_object;
116atomic_t fscache_n_cop_drop_object;
117atomic_t fscache_n_cop_put_object;
118atomic_t fscache_n_cop_sync_cache;
119atomic_t fscache_n_cop_attr_changed;
120atomic_t fscache_n_cop_read_or_alloc_page;
121atomic_t fscache_n_cop_read_or_alloc_pages;
122atomic_t fscache_n_cop_allocate_page;
123atomic_t fscache_n_cop_allocate_pages;
124atomic_t fscache_n_cop_write_page;
125atomic_t fscache_n_cop_uncache_page;
126atomic_t fscache_n_cop_dissociate_pages;
127
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130
131static int fscache_stats_show(struct seq_file *m, void *v)
132{
133 seq_puts(m, "FS-Cache statistics\n");
134
135 seq_printf(m, "Cookies: idx=%u dat=%u spc=%u\n",
136 atomic_read(&fscache_n_cookie_index),
137 atomic_read(&fscache_n_cookie_data),
138 atomic_read(&fscache_n_cookie_special));
139
140 seq_printf(m, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
141 atomic_read(&fscache_n_object_alloc),
142 atomic_read(&fscache_n_object_no_alloc),
143 atomic_read(&fscache_n_object_avail),
144 atomic_read(&fscache_n_object_dead));
145 seq_printf(m, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
146 atomic_read(&fscache_n_checkaux_none),
147 atomic_read(&fscache_n_checkaux_okay),
148 atomic_read(&fscache_n_checkaux_update),
149 atomic_read(&fscache_n_checkaux_obsolete));
150
151 seq_printf(m, "Pages : mrk=%u unc=%u\n",
152 atomic_read(&fscache_n_marks),
153 atomic_read(&fscache_n_uncaches));
154
155 seq_printf(m, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
156 " oom=%u\n",
157 atomic_read(&fscache_n_acquires),
158 atomic_read(&fscache_n_acquires_null),
159 atomic_read(&fscache_n_acquires_no_cache),
160 atomic_read(&fscache_n_acquires_ok),
161 atomic_read(&fscache_n_acquires_nobufs),
162 atomic_read(&fscache_n_acquires_oom));
163
164 seq_printf(m, "Lookups: n=%u neg=%u pos=%u crt=%u tmo=%u\n",
165 atomic_read(&fscache_n_object_lookups),
166 atomic_read(&fscache_n_object_lookups_negative),
167 atomic_read(&fscache_n_object_lookups_positive),
168 atomic_read(&fscache_n_object_lookups_timed_out),
169 atomic_read(&fscache_n_object_created));
170
171 seq_printf(m, "Updates: n=%u nul=%u run=%u\n",
172 atomic_read(&fscache_n_updates),
173 atomic_read(&fscache_n_updates_null),
174 atomic_read(&fscache_n_updates_run));
175
176 seq_printf(m, "Relinqs: n=%u nul=%u wcr=%u rtr=%u\n",
177 atomic_read(&fscache_n_relinquishes),
178 atomic_read(&fscache_n_relinquishes_null),
179 atomic_read(&fscache_n_relinquishes_waitcrt),
180 atomic_read(&fscache_n_relinquishes_retire));
181
182 seq_printf(m, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
183 atomic_read(&fscache_n_attr_changed),
184 atomic_read(&fscache_n_attr_changed_ok),
185 atomic_read(&fscache_n_attr_changed_nobufs),
186 atomic_read(&fscache_n_attr_changed_nomem),
187 atomic_read(&fscache_n_attr_changed_calls));
188
189 seq_printf(m, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
190 atomic_read(&fscache_n_allocs),
191 atomic_read(&fscache_n_allocs_ok),
192 atomic_read(&fscache_n_allocs_wait),
193 atomic_read(&fscache_n_allocs_nobufs),
194 atomic_read(&fscache_n_allocs_intr));
195 seq_printf(m, "Allocs : ops=%u owt=%u abt=%u\n",
196 atomic_read(&fscache_n_alloc_ops),
197 atomic_read(&fscache_n_alloc_op_waits),
198 atomic_read(&fscache_n_allocs_object_dead));
199
200 seq_printf(m, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
201 " int=%u oom=%u\n",
202 atomic_read(&fscache_n_retrievals),
203 atomic_read(&fscache_n_retrievals_ok),
204 atomic_read(&fscache_n_retrievals_wait),
205 atomic_read(&fscache_n_retrievals_nodata),
206 atomic_read(&fscache_n_retrievals_nobufs),
207 atomic_read(&fscache_n_retrievals_intr),
208 atomic_read(&fscache_n_retrievals_nomem));
209 seq_printf(m, "Retrvls: ops=%u owt=%u abt=%u\n",
210 atomic_read(&fscache_n_retrieval_ops),
211 atomic_read(&fscache_n_retrieval_op_waits),
212 atomic_read(&fscache_n_retrievals_object_dead));
213
214 seq_printf(m, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
215 atomic_read(&fscache_n_stores),
216 atomic_read(&fscache_n_stores_ok),
217 atomic_read(&fscache_n_stores_again),
218 atomic_read(&fscache_n_stores_nobufs),
219 atomic_read(&fscache_n_stores_oom));
220 seq_printf(m, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
221 atomic_read(&fscache_n_store_ops),
222 atomic_read(&fscache_n_store_calls),
223 atomic_read(&fscache_n_store_pages),
224 atomic_read(&fscache_n_store_radix_deletes),
225 atomic_read(&fscache_n_store_pages_over_limit));
226
227 seq_printf(m, "VmScan : nos=%u gon=%u bsy=%u can=%u\n",
228 atomic_read(&fscache_n_store_vmscan_not_storing),
229 atomic_read(&fscache_n_store_vmscan_gone),
230 atomic_read(&fscache_n_store_vmscan_busy),
231 atomic_read(&fscache_n_store_vmscan_cancelled));
232
233 seq_printf(m, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
234 atomic_read(&fscache_n_op_pend),
235 atomic_read(&fscache_n_op_run),
236 atomic_read(&fscache_n_op_enqueue),
237 atomic_read(&fscache_n_op_cancelled),
238 atomic_read(&fscache_n_op_rejected));
239 seq_printf(m, "Ops : dfr=%u rel=%u gc=%u\n",
240 atomic_read(&fscache_n_op_deferred_release),
241 atomic_read(&fscache_n_op_release),
242 atomic_read(&fscache_n_op_gc));
243
244 seq_printf(m, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
245 atomic_read(&fscache_n_cop_alloc_object),
246 atomic_read(&fscache_n_cop_lookup_object),
247 atomic_read(&fscache_n_cop_lookup_complete),
248 atomic_read(&fscache_n_cop_grab_object));
249 seq_printf(m, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n",
250 atomic_read(&fscache_n_cop_update_object),
251 atomic_read(&fscache_n_cop_drop_object),
252 atomic_read(&fscache_n_cop_put_object),
253 atomic_read(&fscache_n_cop_attr_changed),
254 atomic_read(&fscache_n_cop_sync_cache));
255 seq_printf(m, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
256 atomic_read(&fscache_n_cop_read_or_alloc_page),
257 atomic_read(&fscache_n_cop_read_or_alloc_pages),
258 atomic_read(&fscache_n_cop_allocate_page),
259 atomic_read(&fscache_n_cop_allocate_pages),
260 atomic_read(&fscache_n_cop_write_page),
261 atomic_read(&fscache_n_cop_uncache_page),
262 atomic_read(&fscache_n_cop_dissociate_pages));
263 return 0;
264}
265
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267
268
269static int fscache_stats_open(struct inode *inode, struct file *file)
270{
271 return single_open(file, fscache_stats_show, NULL);
272}
273
274const struct file_operations fscache_stats_fops = {
275 .owner = THIS_MODULE,
276 .open = fscache_stats_open,
277 .read = seq_read,
278 .llseek = seq_lseek,
279 .release = seq_release,
280};
281
