mm: memcg/slab: fix percpu slab vmstats flushing
[linux-2.6-microblaze.git] / fs / orangefs / orangefs-mod.c
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
25 struct orangefs_stats orangefs_stats;
26
27 /* the size of the hash tables for ops in progress */
28 int hash_table_size = 509;
29
30 static ulong module_parm_debug_mask;
31 __u64 orangefs_gossip_debug_mask;
32 int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS;
33 int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS;
34 int orangefs_cache_timeout_msecs = 50;
35 int orangefs_dcache_timeout_msecs = 50;
36 int orangefs_getattr_timeout_msecs = 50;
37
38 MODULE_LICENSE("GPL");
39 MODULE_AUTHOR("ORANGEFS Development Team");
40 MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS");
41 MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)");
42 MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds");
43 MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds");
44 MODULE_PARM_DESC(hash_table_size,
45                  "size of hash table for operations in progress");
46
47 static 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
54 module_param(hash_table_size, int, 0);
55 module_param(module_parm_debug_mask, ulong, 0644);
56 module_param(op_timeout_secs, int, 0);
57 module_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  */
65 DEFINE_MUTEX(orangefs_request_mutex);
66
67 /* hash table for storing operations waiting for matching downcall */
68 struct list_head *orangefs_htable_ops_in_progress;
69 DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock);
70
71 /* list for queueing upcall operations */
72 LIST_HEAD(orangefs_request_list);
73
74 /* used to protect the above orangefs_request_list */
75 DEFINE_SPINLOCK(orangefs_request_list_lock);
76
77 /* used for incoming request notification */
78 DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq);
79
80 static int __init orangefs_init(void)
81 {
82         int ret = -1;
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_device;
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                 ret = 0;
153                 goto out;
154         }
155
156         orangefs_sysfs_exit();
157
158 cleanup_device:
159         orangefs_dev_cleanup();
160
161 sysfs_init_failed:
162         orangefs_debugfs_cleanup();
163
164 cleanup_key_table:
165         fsid_key_table_finalize();
166
167 cleanup_progress_table:
168         kfree(orangefs_htable_ops_in_progress);
169
170 cleanup_inode:
171         orangefs_inode_cache_finalize();
172
173 cleanup_op:
174         op_cache_finalize();
175
176 out:
177         return ret;
178 }
179
180 static void __exit orangefs_exit(void)
181 {
182         int i = 0;
183         gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n");
184
185         unregister_filesystem(&orangefs_fs_type);
186         orangefs_debugfs_cleanup();
187         orangefs_sysfs_exit();
188         fsid_key_table_finalize();
189         orangefs_dev_cleanup();
190         BUG_ON(!list_empty(&orangefs_request_list));
191         for (i = 0; i < hash_table_size; i++)
192                 BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i]));
193
194         orangefs_inode_cache_finalize();
195         op_cache_finalize();
196
197         kfree(orangefs_htable_ops_in_progress);
198
199         pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION);
200 }
201
202 /*
203  * What we do in this function is to walk the list of operations
204  * that are in progress in the hash table and mark them as purged as well.
205  */
206 void purge_inprogress_ops(void)
207 {
208         int i;
209
210         for (i = 0; i < hash_table_size; i++) {
211                 struct orangefs_kernel_op_s *op;
212                 struct orangefs_kernel_op_s *next;
213
214                 spin_lock(&orangefs_htable_ops_in_progress_lock);
215                 list_for_each_entry_safe(op,
216                                          next,
217                                          &orangefs_htable_ops_in_progress[i],
218                                          list) {
219                         set_op_state_purged(op);
220                         gossip_debug(GOSSIP_DEV_DEBUG,
221                                      "%s: op:%s: op_state:%d: process:%s:\n",
222                                      __func__,
223                                      get_opname_string(op),
224                                      op->op_state,
225                                      current->comm);
226                 }
227                 spin_unlock(&orangefs_htable_ops_in_progress_lock);
228         }
229 }
230
231 module_init(orangefs_init);
232 module_exit(orangefs_exit);