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
21DEFINE_PER_CPU(struct xfsstats, xfsstats);
22
23static int counter_val(int idx)
24{
25	int val = 0, cpu;
26
27	for_each_possible_cpu(cpu)
28		val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx));
29	return val;
30}
31
32static int xfs_stat_proc_show(struct seq_file *m, void *v)
33{
34	int		i, j;
35	__uint64_t	xs_xstrat_bytes = 0;
36	__uint64_t	xs_write_bytes = 0;
37	__uint64_t	xs_read_bytes = 0;
38
39	static const struct xstats_entry {
40		char	*desc;
41		int	endpoint;
42	} xstats[] = {
43		{ "extent_alloc",	XFSSTAT_END_EXTENT_ALLOC	},
44		{ "abt",		XFSSTAT_END_ALLOC_BTREE		},
45		{ "blk_map",		XFSSTAT_END_BLOCK_MAPPING	},
46		{ "bmbt",		XFSSTAT_END_BLOCK_MAP_BTREE	},
47		{ "dir",		XFSSTAT_END_DIRECTORY_OPS	},
48		{ "trans",		XFSSTAT_END_TRANSACTIONS	},
49		{ "ig",			XFSSTAT_END_INODE_OPS		},
50		{ "log",		XFSSTAT_END_LOG_OPS		},
51		{ "push_ail",		XFSSTAT_END_TAIL_PUSHING	},
52		{ "xstrat",		XFSSTAT_END_WRITE_CONVERT	},
53		{ "rw",			XFSSTAT_END_READ_WRITE_OPS	},
54		{ "attr",		XFSSTAT_END_ATTRIBUTE_OPS	},
55		{ "icluster",		XFSSTAT_END_INODE_CLUSTER	},
56		{ "vnodes",		XFSSTAT_END_VNODE_OPS		},
57		{ "buf",		XFSSTAT_END_BUF			},
58		{ "abtb2",		XFSSTAT_END_ABTB_V2		},
59		{ "abtc2",		XFSSTAT_END_ABTC_V2		},
60		{ "bmbt2",		XFSSTAT_END_BMBT_V2		},
61		{ "ibt2",		XFSSTAT_END_IBT_V2		},
62		{ "fibt2",		XFSSTAT_END_FIBT_V2		},
63		/* we print both series of quota information together */
64		{ "qm",			XFSSTAT_END_QM			},
65	};
66
67	/* Loop over all stats groups */
68	for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
69		seq_printf(m, "%s", xstats[i].desc);
70		/* inner loop does each group */
71		for (; j < xstats[i].endpoint; j++)
72			seq_printf(m, " %u", counter_val(j));
73		seq_putc(m, '\n');
74	}
75	/* extra precision counters */
76	for_each_possible_cpu(i) {
77		xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
78		xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
79		xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
80	}
81
82	seq_printf(m, "xpc %Lu %Lu %Lu\n",
83			xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
84	seq_printf(m, "debug %u\n",
85#if defined(DEBUG)
86		1);
87#else
88		0);
89#endif
90	return 0;
91}
92
93static int xfs_stat_proc_open(struct inode *inode, struct file *file)
94{
95	return single_open(file, xfs_stat_proc_show, NULL);
96}
97
98static const struct file_operations xfs_stat_proc_fops = {
99	.owner		= THIS_MODULE,
100	.open		= xfs_stat_proc_open,
101	.read		= seq_read,
102	.llseek		= seq_lseek,
103	.release	= single_release,
104};
105
106/* legacy quota interfaces */
107#ifdef CONFIG_XFS_QUOTA
108static int xqm_proc_show(struct seq_file *m, void *v)
109{
110	/* maximum; incore; ratio free to inuse; freelist */
111	seq_printf(m, "%d\t%d\t%d\t%u\n",
112			0,
113			counter_val(XFSSTAT_END_XQMSTAT),
114			0,
115			counter_val(XFSSTAT_END_XQMSTAT + 1));
116	return 0;
117}
118
119static int xqm_proc_open(struct inode *inode, struct file *file)
120{
121	return single_open(file, xqm_proc_show, NULL);
122}
123
124static const struct file_operations xqm_proc_fops = {
125	.owner		= THIS_MODULE,
126	.open		= xqm_proc_open,
127	.read		= seq_read,
128	.llseek		= seq_lseek,
129	.release	= single_release,
130};
131
132/* legacy quota stats interface no 2 */
133static int xqmstat_proc_show(struct seq_file *m, void *v)
134{
135	int j;
136
137	seq_printf(m, "qm");
138	for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
139		seq_printf(m, " %u", counter_val(j));
140	seq_putc(m, '\n');
141	return 0;
142}
143
144static int xqmstat_proc_open(struct inode *inode, struct file *file)
145{
146	return single_open(file, xqmstat_proc_show, NULL);
147}
148
149static const struct file_operations xqmstat_proc_fops = {
150	.owner		= THIS_MODULE,
151	.open		= xqmstat_proc_open,
152	.read		= seq_read,
153	.llseek		= seq_lseek,
154	.release	= single_release,
155};
156#endif /* CONFIG_XFS_QUOTA */
157
158int
159xfs_init_procfs(void)
160{
161	if (!proc_mkdir("fs/xfs", NULL))
162		goto out;
163
164	if (!proc_create("fs/xfs/stat", 0, NULL,
165			 &xfs_stat_proc_fops))
166		goto out_remove_xfs_dir;
167#ifdef CONFIG_XFS_QUOTA
168	if (!proc_create("fs/xfs/xqmstat", 0, NULL,
169			 &xqmstat_proc_fops))
170		goto out_remove_stat_file;
171	if (!proc_create("fs/xfs/xqm", 0, NULL,
172			 &xqm_proc_fops))
173		goto out_remove_xqmstat_file;
174#endif
175	return 0;
176
177#ifdef CONFIG_XFS_QUOTA
178 out_remove_xqmstat_file:
179	remove_proc_entry("fs/xfs/xqmstat", NULL);
180 out_remove_stat_file:
181	remove_proc_entry("fs/xfs/stat", NULL);
182#endif
183 out_remove_xfs_dir:
184	remove_proc_entry("fs/xfs", NULL);
185 out:
186	return -ENOMEM;
187}
188
189void
190xfs_cleanup_procfs(void)
191{
192#ifdef CONFIG_XFS_QUOTA
193	remove_proc_entry("fs/xfs/xqm", NULL);
194	remove_proc_entry("fs/xfs/xqmstat", NULL);
195#endif
196	remove_proc_entry("fs/xfs/stat", NULL);
197	remove_proc_entry("fs/xfs", NULL);
198}
199