Commit | Line | Data |
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16216333 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
7ea34ac1 JL |
2 | /* |
3 | * per net namespace data structures for nfsd | |
4 | * | |
5 | * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com> | |
7ea34ac1 JL |
6 | */ |
7 | ||
8 | #ifndef __NFSD_NETNS_H__ | |
9 | #define __NFSD_NETNS_H__ | |
10 | ||
11 | #include <net/net_namespace.h> | |
12 | #include <net/netns/generic.h> | |
5970e15d | 13 | #include <linux/filelock.h> |
e567b98c | 14 | #include <linux/percpu_counter.h> |
91d2e9b5 | 15 | #include <linux/siphash.h> |
7ea34ac1 | 16 | |
52e19c09 SK |
17 | /* Hash tables for nfs4_clientid state */ |
18 | #define CLIENT_HASH_BITS 4 | |
19 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
20 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
21 | ||
1872de0e SK |
22 | #define SESSION_HASH_SIZE 512 |
23 | ||
7ea34ac1 | 24 | struct cld_net; |
9a9c6478 | 25 | struct nfsd4_client_tracking_ops; |
7ea34ac1 | 26 | |
e567b98c AG |
27 | enum { |
28 | /* cache misses due only to checksum comparison failures */ | |
29 | NFSD_NET_PAYLOAD_MISSES, | |
30 | /* amount of memory (in bytes) currently consumed by the DRC */ | |
31 | NFSD_NET_DRC_MEM_USAGE, | |
32 | NFSD_NET_COUNTERS_NUM | |
33 | }; | |
34 | ||
14a571a8 JL |
35 | /* |
36 | * Represents a nfsd "container". With respect to nfsv4 state tracking, the | |
37 | * fields of interest are the *_id_hashtbls and the *_name_tree. These track | |
38 | * the nfs4_client objects by either short or long form clientid. | |
39 | * | |
40 | * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean | |
41 | * up expired clients and delegations within the container. | |
42 | */ | |
7ea34ac1 JL |
43 | struct nfsd_net { |
44 | struct cld_net *cld_net; | |
b3853e0e | 45 | |
e5f06f72 | 46 | struct cache_detail *svc_expkey_cache; |
b3853e0e | 47 | struct cache_detail *svc_export_cache; |
c2e76ef5 SK |
48 | |
49 | struct cache_detail *idtoname_cache; | |
9e75a4de | 50 | struct cache_detail *nametoid_cache; |
5e1533c7 SK |
51 | |
52 | struct lock_manager nfsd4_manager; | |
a51c84ed | 53 | bool grace_ended; |
9cc76801 | 54 | time64_t boot_time; |
52e19c09 | 55 | |
e8a79fb1 BF |
56 | struct dentry *nfsd_client_dir; |
57 | ||
52e19c09 SK |
58 | /* |
59 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
60 | * used in reboot/reset lease grace period processing | |
382a62e7 SK |
61 | * |
62 | * conf_id_hashtbl[], and conf_name_tree hold confirmed | |
63 | * setclientid_confirmed info. | |
a99454aa SK |
64 | * |
65 | * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed | |
66 | * setclientid info. | |
52e19c09 SK |
67 | */ |
68 | struct list_head *reclaim_str_hashtbl; | |
69 | int reclaim_str_hashtbl_size; | |
8daae4dc | 70 | struct list_head *conf_id_hashtbl; |
382a62e7 | 71 | struct rb_root conf_name_tree; |
0a7ec377 | 72 | struct list_head *unconf_id_hashtbl; |
a99454aa | 73 | struct rb_root unconf_name_tree; |
1872de0e | 74 | struct list_head *sessionid_hashtbl; |
5ed58bb2 SK |
75 | /* |
76 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
77 | * for lease renewal. | |
73758fed SK |
78 | * |
79 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
80 | * for last close replay. | |
81 | * | |
82 | * All of the above fields are protected by the client_mutex. | |
5ed58bb2 SK |
83 | */ |
84 | struct list_head client_lru; | |
73758fed | 85 | struct list_head close_lru; |
e8c69d17 | 86 | struct list_head del_recall_lru; |
0cc11a61 JL |
87 | |
88 | /* protected by blocked_locks_lock */ | |
7919d0a2 | 89 | struct list_head blocked_locks_lru; |
09121281 SK |
90 | |
91 | struct delayed_work laundromat_work; | |
c9a49628 SK |
92 | |
93 | /* client_lock protects the client lru list and session hash table */ | |
94 | spinlock_t client_lock; | |
3a073369 | 95 | |
0cc11a61 JL |
96 | /* protects blocked_locks_lru */ |
97 | spinlock_t blocked_locks_lock; | |
98 | ||
3a073369 | 99 | struct file *rec_file; |
f141f79d | 100 | bool in_grace; |
7c582e4f | 101 | const struct nfsd4_client_tracking_ops *client_tracking_ops; |
3d733711 | 102 | |
20b7d86f AB |
103 | time64_t nfsd4_lease; |
104 | time64_t nfsd4_grace; | |
03f318ca | 105 | bool somebody_reclaimed; |
2c2fe290 | 106 | |
362063a5 SM |
107 | bool track_reclaim_completes; |
108 | atomic_t nr_reclaim_complete; | |
109 | ||
2c2fe290 | 110 | bool nfsd_net_up; |
8ef66714 | 111 | bool lockd_up; |
b9c0ef85 | 112 | |
91d2e9b5 CL |
113 | seqlock_t writeverf_lock; |
114 | unsigned char writeverf[8]; | |
9dd9845f | 115 | |
5b8db00b JL |
116 | /* |
117 | * Max number of connections this nfsd container will allow. Defaults | |
118 | * to '0' which is means that it bases this on the number of threads. | |
119 | */ | |
120 | unsigned int max_connections; | |
121 | ||
bf5ed3e3 | 122 | u32 clientid_base; |
294ac32e | 123 | u32 clientid_counter; |
19311aa8 | 124 | u32 clverifier_counter; |
294ac32e | 125 | |
9dd9845f | 126 | struct svc_serv *nfsd_serv; |
ec52361d N |
127 | /* When a listening socket is added to nfsd, keep_active is set |
128 | * and this justifies a reference on nfsd_serv. This stops | |
129 | * nfsd_serv from being freed. When the number of threads is | |
130 | * set, keep_active is cleared and the reference is dropped. So | |
131 | * when the last thread exits, the service will be destroyed. | |
132 | */ | |
133 | int keep_active; | |
2317dc55 | 134 | |
e0639dc5 OK |
135 | /* |
136 | * clientid and stateid data for construction of net unique COPY | |
137 | * stateids. | |
138 | */ | |
139 | u32 s2s_cp_cl_id; | |
140 | struct idr s2s_cp_stateids; | |
141 | spinlock_t s2s_cp_lock; | |
e333f3bb TM |
142 | |
143 | /* | |
144 | * Version information | |
145 | */ | |
146 | bool *nfsd_versions; | |
147 | bool *nfsd4_minorversions; | |
3ba75830 BF |
148 | |
149 | /* | |
150 | * Duplicate reply cache | |
151 | */ | |
152 | struct nfsd_drc_bucket *drc_hashtbl; | |
3ba75830 BF |
153 | |
154 | /* max number of entries allowed in the cache */ | |
155 | unsigned int max_drc_entries; | |
156 | ||
157 | /* number of significant bits in the hash value */ | |
158 | unsigned int maskbits; | |
159 | unsigned int drc_hashsize; | |
160 | ||
161 | /* | |
22a46eb4 | 162 | * Stats and other tracking of on the duplicate reply cache. |
e567b98c AG |
163 | * The longest_chain* fields are modified with only the per-bucket |
164 | * cache lock, which isn't really safe and should be fixed if we want | |
165 | * these statistics to be completely accurate. | |
3ba75830 BF |
166 | */ |
167 | ||
168 | /* total number of entries */ | |
169 | atomic_t num_drc_entries; | |
170 | ||
e567b98c AG |
171 | /* Per-netns stats counters */ |
172 | struct percpu_counter counter[NFSD_NET_COUNTERS_NUM]; | |
3ba75830 BF |
173 | |
174 | /* longest hash chain seen */ | |
175 | unsigned int longest_chain; | |
176 | ||
177 | /* size of cache when we saw the longest hash chain */ | |
178 | unsigned int longest_chain_cachesize; | |
179 | ||
180 | struct shrinker nfsd_reply_cache_shrinker; | |
f4e44b39 DN |
181 | |
182 | /* tracking server-to-server copy mounts */ | |
183 | spinlock_t nfsd_ssc_lock; | |
184 | struct list_head nfsd_ssc_mount_list; | |
185 | wait_queue_head_t nfsd_ssc_waitq; | |
186 | ||
94a4beaa | 187 | /* utsname taken from the process that starts the server */ |
7627d7dc | 188 | char nfsd_name[UNX_MAXNODENAME+1]; |
1463b38e N |
189 | |
190 | struct nfsd_fcache_disposal *fcache_disposal; | |
91d2e9b5 CL |
191 | |
192 | siphash_key_t siphash_key; | |
0926c395 DN |
193 | |
194 | atomic_t nfs4_client_count; | |
4271c2c0 | 195 | int nfs4_max_clients; |
3a4ea23d DN |
196 | |
197 | atomic_t nfsd_courtesy_clients; | |
7746b32f | 198 | struct shrinker nfsd_client_shrinker; |
7c24fa22 | 199 | struct work_struct nfsd_shrinker_work; |
7ea34ac1 JL |
200 | }; |
201 | ||
44e34da6 BS |
202 | /* Simple check to find out if a given net was properly initialized */ |
203 | #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) | |
204 | ||
e333f3bb TM |
205 | extern void nfsd_netns_free_versions(struct nfsd_net *nn); |
206 | ||
c7d03a00 | 207 | extern unsigned int nfsd_net_id; |
27c438f5 | 208 | |
3988a578 CL |
209 | void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn); |
210 | void nfsd_reset_write_verifier(struct nfsd_net *nn); | |
7ea34ac1 | 211 | #endif /* __NFSD_NETNS_H__ */ |