1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * (C) 2001 Clemson University and The University of Chicago
4 *
5 * Changes by Acxiom Corporation to add proc file handler for pvfs2 client
6 * parameters, Copyright Acxiom Corporation, 2005.
7 *
8 * See COPYING in top-level directory.
9 */
10
11#include "protocol.h"
12#include "orangefs-kernel.h"
13#include "orangefs-debugfs.h"
14#include "orangefs-sysfs.h"
15
16/* ORANGEFS_VERSION is a ./configure define */
17#ifndef ORANGEFS_VERSION
18#define ORANGEFS_VERSION "upstream"
19#endif
20
21/*
22 * global variables declared here
23 */
24
25struct orangefs_stats orangefs_stats;
26
27/* the size of the hash tables for ops in progress */
28int hash_table_size = 509;
29
30static ulong module_parm_debug_mask;
31__u64 orangefs_gossip_debug_mask;
32int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS;
33int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS;
34int orangefs_cache_timeout_msecs = 500;
35int orangefs_dcache_timeout_msecs = 50;
36int orangefs_getattr_timeout_msecs = 50;
37
38MODULE_LICENSE("GPL");
39MODULE_AUTHOR("ORANGEFS Development Team");
40MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
41MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
42MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
43MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
44MODULE_PARM_DESC(hash_table_size,
45		 "size of hash table for operations in progress");
46
47static struct file_system_type orangefs_fs_type = {
48	.name = "pvfs2",
49	.mount = orangefs_mount,
50	.kill_sb = orangefs_kill_sb,
51	.owner = THIS_MODULE,
52};
53
54module_param(hash_table_size, int, 0);
55module_param(module_parm_debug_mask, ulong, 0644);
56module_param(op_timeout_secs, int, 0);
57module_param(slot_timeout_secs, int, 0);
58
59/*
60 * Blocks non-priority requests from being queued for servicing.  This
61 * could be used for protecting the request list data structure, but
62 * for now it's only being used to stall the op addition to the request
63 * list
64 */
65DEFINE_MUTEX(orangefs_request_mutex);
66
67/* hash table for storing operations waiting for matching downcall */
68struct list_head *orangefs_htable_ops_in_progress;
69DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
70
71/* list for queueing upcall operations */
72LIST_HEAD(orangefs_request_list);
73
74/* used to protect the above orangefs_request_list */
75DEFINE_SPINLOCK(orangefs_request_list_lock);
76
77/* used for incoming request notification */
78DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
79
80static int __init orangefs_init(void)
81{
82	int ret;
83	__u32 i = 0;
84
85	if (op_timeout_secs < 0)
86		op_timeout_secs = 0;
87
88	if (slot_timeout_secs < 0)
89		slot_timeout_secs = 0;
90
91	/* initialize global book keeping data structures */
92	ret = op_cache_initialize();
93	if (ret < 0)
94		goto out;
95
96	ret = orangefs_inode_cache_initialize();
97	if (ret < 0)
98		goto cleanup_op;
99
100	orangefs_htable_ops_in_progress =
101	    kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
102	if (!orangefs_htable_ops_in_progress) {
103		ret = -ENOMEM;
104		goto cleanup_inode;
105	}
106
107	/* initialize a doubly linked at each hash table index */
108	for (i = 0; i < hash_table_size; i++)
109		INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]);
110
111	ret = fsid_key_table_initialize();
112	if (ret < 0)
113		goto cleanup_progress_table;
114
115	/*
116	 * Build the contents of /sys/kernel/debug/orangefs/debug-help
117	 * from the keywords in the kernel keyword/mask array.
118	 *
119	 * The keywords in the client keyword/mask array are
120	 * unknown at boot time.
121	 *
122	 * orangefs_prepare_debugfs_help_string will be used again
123	 * later to rebuild the debug-help-string after the client starts
124	 * and passes along the needed info. The argument signifies
125	 * which time orangefs_prepare_debugfs_help_string is being
126	 * called.
127	 */
128	ret = orangefs_prepare_debugfs_help_string(1);
129	if (ret)
130		goto cleanup_key_table;
131
132	orangefs_debugfs_init(module_parm_debug_mask);
133
134	ret = orangefs_sysfs_init();
135	if (ret)
136		goto sysfs_init_failed;
137
138	/* Initialize the orangefsdev subsystem. */
139	ret = orangefs_dev_init();
140	if (ret < 0) {
141		gossip_err("%s: could not initialize device subsystem %d!\n",
142			   __func__,
143			   ret);
144		goto cleanup_sysfs;
145	}
146
147	ret = register_filesystem(&orangefs_fs_type);
148	if (ret == 0) {
149		pr_info("%s: module version %s loaded\n",
150			__func__,
151			ORANGEFS_VERSION);
152		goto out;
153	}
154
155	orangefs_dev_cleanup();
156
157cleanup_sysfs:
158	orangefs_sysfs_exit();
159
160sysfs_init_failed:
161	orangefs_debugfs_cleanup();
162
163cleanup_key_table:
164	fsid_key_table_finalize();
165
166cleanup_progress_table:
167	kfree(orangefs_htable_ops_in_progress);
168
169cleanup_inode:
170	orangefs_inode_cache_finalize();
171
172cleanup_op:
173	op_cache_finalize();
174
175out:
176	return ret;
177}
178
179static void __exit orangefs_exit(void)
180{
181	int i = 0;
182	gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
183
184	unregister_filesystem(&orangefs_fs_type);
185	orangefs_debugfs_cleanup();
186	orangefs_sysfs_exit();
187	fsid_key_table_finalize();
188	orangefs_dev_cleanup();
189	BUG_ON(!list_empty(&orangefs_request_list));
190	for (i = 0; i < hash_table_size; i++)
191		BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
192
193	orangefs_inode_cache_finalize();
194	op_cache_finalize();
195
196	kfree(orangefs_htable_ops_in_progress);
197
198	pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
199}
200
201/*
202 * What we do in this function is to walk the list of operations
203 * that are in progress in the hash table and mark them as purged as well.
204 */
205void purge_inprogress_ops(void)
206{
207	int i;
208
209	for (i = 0; i < hash_table_size; i++) {
210		struct orangefs_kernel_op_s *op;
211		struct orangefs_kernel_op_s *next;
212
213		spin_lock(&orangefs_htable_ops_in_progress_lock);
214		list_for_each_entry_safe(op,
215					 next,
216					 &orangefs_htable_ops_in_progress[i],
217					 list) {
218			set_op_state_purged(op);
219			gossip_debug(GOSSIP_DEV_DEBUG,
220				     "%s: op:%s: op_state:%d: process:%s:\n",
221				     __func__,
222				     get_opname_string(op),
223				     op->op_state,
224				     current->comm);
225		}
226		spin_unlock(&orangefs_htable_ops_in_progress_lock);
227	}
228}
229
230module_init(orangefs_init);
231module_exit(orangefs_exit);
232