1/*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#include "xfs.h"
19#include <linux/proc_fs.h>
20
21struct xstats xfsstats;
22
23static int counter_val(struct xfsstats __percpu *stats, int idx)
24{
25	int val = 0, cpu;
26
27	for_each_possible_cpu(cpu)
28		val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx));
29	return val;
30}
31
32int xfs_stats_format(struct xfsstats __percpu *stats, char *buf)
33{
34	int		i, j;
35	int		len = 0;
36	__uint64_t	xs_xstrat_bytes = 0;
37	__uint64_t	xs_write_bytes = 0;
38	__uint64_t	xs_read_bytes = 0;
39
40	static const struct xstats_entry {
41		char	*desc;
42		int	endpoint;
43	} xstats[] = {
44		{ "extent_alloc",	XFSSTAT_END_EXTENT_ALLOC	},
45		{ "abt",		XFSSTAT_END_ALLOC_BTREE		},
46		{ "blk_map",		XFSSTAT_END_BLOCK_MAPPING	},
47		{ "bmbt",		XFSSTAT_END_BLOCK_MAP_BTREE	},
48		{ "dir",		XFSSTAT_END_DIRECTORY_OPS	},
49		{ "trans",		XFSSTAT_END_TRANSACTIONS	},
50		{ "ig",			XFSSTAT_END_INODE_OPS		},
51		{ "log",		XFSSTAT_END_LOG_OPS		},
52		{ "push_ail",		XFSSTAT_END_TAIL_PUSHING	},
53		{ "xstrat",		XFSSTAT_END_WRITE_CONVERT	},
54		{ "rw",			XFSSTAT_END_READ_WRITE_OPS	},
55		{ "attr",		XFSSTAT_END_ATTRIBUTE_OPS	},
56		{ "icluster",		XFSSTAT_END_INODE_CLUSTER	},
57		{ "vnodes",		XFSSTAT_END_VNODE_OPS		},
58		{ "buf",		XFSSTAT_END_BUF			},
59		{ "abtb2",		XFSSTAT_END_ABTB_V2		},
60		{ "abtc2",		XFSSTAT_END_ABTC_V2		},
61		{ "bmbt2",		XFSSTAT_END_BMBT_V2		},
62		{ "ibt2",		XFSSTAT_END_IBT_V2		},
63		{ "fibt2",		XFSSTAT_END_FIBT_V2		},
64		/* we print both series of quota information together */
65		{ "qm",			XFSSTAT_END_QM			},
66	};
67
68	/* Loop over all stats groups */
69
70	for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
71		len += snprintf(buf + len, PATH_MAX - len, "%s",
72				xstats[i].desc);
73		/* inner loop does each group */
74		for (; j < xstats[i].endpoint; j++)
75			len += snprintf(buf + len, PATH_MAX - len, " %u",
76					counter_val(stats, j));
77		len += snprintf(buf + len, PATH_MAX - len, "\n");
78	}
79	/* extra precision counters */
80	for_each_possible_cpu(i) {
81		xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes;
82		xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes;
83		xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes;
84	}
85
86	len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n",
87			xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
88	len += snprintf(buf + len, PATH_MAX-len, "debug %u\n",
89#if defined(DEBUG)
90		1);
91#else
92		0);
93#endif
94
95	return len;
96}
97
98void xfs_stats_clearall(struct xfsstats __percpu *stats)
99{
100	int		c;
101	__uint32_t	vn_active;
102
103	xfs_notice(NULL, "Clearing xfsstats");
104	for_each_possible_cpu(c) {
105		preempt_disable();
106		/* save vn_active, it's a universal truth! */
107		vn_active = per_cpu_ptr(stats, c)->vn_active;
108		memset(per_cpu_ptr(stats, c), 0, sizeof(*stats));
109		per_cpu_ptr(stats, c)->vn_active = vn_active;
110		preempt_enable();
111	}
112}
113
114/* legacy quota interfaces */
115#ifdef CONFIG_XFS_QUOTA
116static int xqm_proc_show(struct seq_file *m, void *v)
117{
118	/* maximum; incore; ratio free to inuse; freelist */
119	seq_printf(m, "%d\t%d\t%d\t%u\n",
120		   0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
121		   0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
122	return 0;
123}
124
125static int xqm_proc_open(struct inode *inode, struct file *file)
126{
127	return single_open(file, xqm_proc_show, NULL);
128}
129
130static const struct file_operations xqm_proc_fops = {
131	.owner		= THIS_MODULE,
132	.open		= xqm_proc_open,
133	.read		= seq_read,
134	.llseek		= seq_lseek,
135	.release	= single_release,
136};
137
138/* legacy quota stats interface no 2 */
139static int xqmstat_proc_show(struct seq_file *m, void *v)
140{
141	int j;
142
143	seq_printf(m, "qm");
144	for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
145		seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
146	seq_putc(m, '\n');
147	return 0;
148}
149
150static int xqmstat_proc_open(struct inode *inode, struct file *file)
151{
152	return single_open(file, xqmstat_proc_show, NULL);
153}
154
155static const struct file_operations xqmstat_proc_fops = {
156	.owner		= THIS_MODULE,
157	.open		= xqmstat_proc_open,
158	.read		= seq_read,
159	.llseek		= seq_lseek,
160	.release	= single_release,
161};
162#endif /* CONFIG_XFS_QUOTA */
163
164#ifdef CONFIG_PROC_FS
165int
166xfs_init_procfs(void)
167{
168	if (!proc_mkdir("fs/xfs", NULL))
169		return -ENOMEM;
170
171	if (!proc_symlink("fs/xfs/stat", NULL,
172			  "/sys/fs/xfs/stats/stats"))
173		goto out;
174
175#ifdef CONFIG_XFS_QUOTA
176	if (!proc_create("fs/xfs/xqmstat", 0, NULL,
177			 &xqmstat_proc_fops))
178		goto out;
179	if (!proc_create("fs/xfs/xqm", 0, NULL,
180			 &xqm_proc_fops))
181		goto out;
182#endif
183	return 0;
184
185out:
186	remove_proc_subtree("fs/xfs", NULL);
187	return -ENOMEM;
188}
189
190void
191xfs_cleanup_procfs(void)
192{
193	remove_proc_subtree("fs/xfs", NULL);
194}
195#endif /* CONFIG_PROC_FS */
196