1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * per net namespace data structures for nfsd |
4 | * |
5 | * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com> |
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> |
13 | #include <linux/filelock.h> |
14 | #include <linux/nfs4.h> |
15 | #include <linux/percpu_counter.h> |
16 | #include <linux/siphash.h> |
17 | #include <linux/sunrpc/stats.h> |
18 | |
19 | /* Hash tables for nfs4_clientid state */ |
20 | #define CLIENT_HASH_BITS 4 |
21 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
22 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
23 | |
24 | #define SESSION_HASH_SIZE 512 |
25 | |
26 | struct cld_net; |
27 | struct nfsd4_client_tracking_ops; |
28 | |
29 | enum { |
30 | /* cache misses due only to checksum comparison failures */ |
31 | NFSD_STATS_PAYLOAD_MISSES, |
32 | /* amount of memory (in bytes) currently consumed by the DRC */ |
33 | NFSD_STATS_DRC_MEM_USAGE, |
34 | NFSD_STATS_RC_HITS, /* repcache hits */ |
35 | NFSD_STATS_RC_MISSES, /* repcache misses */ |
36 | NFSD_STATS_RC_NOCACHE, /* uncached reqs */ |
37 | NFSD_STATS_FH_STALE, /* FH stale error */ |
38 | NFSD_STATS_IO_READ, /* bytes returned to read requests */ |
39 | NFSD_STATS_IO_WRITE, /* bytes passed in write requests */ |
40 | #ifdef CONFIG_NFSD_V4 |
41 | NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */ |
42 | NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP, |
43 | #define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op)) |
44 | NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */ |
45 | #endif |
46 | NFSD_STATS_COUNTERS_NUM |
47 | }; |
48 | |
49 | /* |
50 | * Represents a nfsd "container". With respect to nfsv4 state tracking, the |
51 | * fields of interest are the *_id_hashtbls and the *_name_tree. These track |
52 | * the nfs4_client objects by either short or long form clientid. |
53 | * |
54 | * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean |
55 | * up expired clients and delegations within the container. |
56 | */ |
57 | struct nfsd_net { |
58 | struct cld_net *cld_net; |
59 | |
60 | struct cache_detail *svc_expkey_cache; |
61 | struct cache_detail *svc_export_cache; |
62 | |
63 | struct cache_detail *idtoname_cache; |
64 | struct cache_detail *nametoid_cache; |
65 | |
66 | struct lock_manager nfsd4_manager; |
67 | bool grace_ended; |
68 | time64_t boot_time; |
69 | |
70 | struct dentry *nfsd_client_dir; |
71 | |
72 | /* |
73 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
74 | * used in reboot/reset lease grace period processing |
75 | * |
76 | * conf_id_hashtbl[], and conf_name_tree hold confirmed |
77 | * setclientid_confirmed info. |
78 | * |
79 | * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed |
80 | * setclientid info. |
81 | */ |
82 | struct list_head *reclaim_str_hashtbl; |
83 | int reclaim_str_hashtbl_size; |
84 | struct list_head *conf_id_hashtbl; |
85 | struct rb_root conf_name_tree; |
86 | struct list_head *unconf_id_hashtbl; |
87 | struct rb_root unconf_name_tree; |
88 | struct list_head *sessionid_hashtbl; |
89 | /* |
90 | * client_lru holds client queue ordered by nfs4_client.cl_time |
91 | * for lease renewal. |
92 | * |
93 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
94 | * for last close replay. |
95 | * |
96 | * All of the above fields are protected by the client_mutex. |
97 | */ |
98 | struct list_head client_lru; |
99 | struct list_head close_lru; |
100 | struct list_head del_recall_lru; |
101 | |
102 | /* protected by blocked_locks_lock */ |
103 | struct list_head blocked_locks_lru; |
104 | |
105 | struct delayed_work laundromat_work; |
106 | |
107 | /* client_lock protects the client lru list and session hash table */ |
108 | spinlock_t client_lock; |
109 | |
110 | /* protects blocked_locks_lru */ |
111 | spinlock_t blocked_locks_lock; |
112 | |
113 | struct file *rec_file; |
114 | bool in_grace; |
115 | const struct nfsd4_client_tracking_ops *client_tracking_ops; |
116 | |
117 | time64_t nfsd4_lease; |
118 | time64_t nfsd4_grace; |
119 | bool somebody_reclaimed; |
120 | |
121 | bool track_reclaim_completes; |
122 | atomic_t nr_reclaim_complete; |
123 | |
124 | bool nfsd_net_up; |
125 | bool lockd_up; |
126 | |
127 | seqlock_t writeverf_lock; |
128 | unsigned char writeverf[8]; |
129 | |
130 | /* |
131 | * Max number of connections this nfsd container will allow. Defaults |
132 | * to '0' which is means that it bases this on the number of threads. |
133 | */ |
134 | unsigned int max_connections; |
135 | |
136 | u32 clientid_base; |
137 | u32 clientid_counter; |
138 | u32 clverifier_counter; |
139 | |
140 | struct svc_info nfsd_info; |
141 | #define nfsd_serv nfsd_info.serv |
142 | |
143 | |
144 | /* |
145 | * clientid and stateid data for construction of net unique COPY |
146 | * stateids. |
147 | */ |
148 | u32 s2s_cp_cl_id; |
149 | struct idr s2s_cp_stateids; |
150 | spinlock_t s2s_cp_lock; |
151 | |
152 | /* |
153 | * Version information |
154 | */ |
155 | bool *nfsd_versions; |
156 | bool *nfsd4_minorversions; |
157 | |
158 | /* |
159 | * Duplicate reply cache |
160 | */ |
161 | struct nfsd_drc_bucket *drc_hashtbl; |
162 | |
163 | /* max number of entries allowed in the cache */ |
164 | unsigned int max_drc_entries; |
165 | |
166 | /* number of significant bits in the hash value */ |
167 | unsigned int maskbits; |
168 | unsigned int drc_hashsize; |
169 | |
170 | /* |
171 | * Stats and other tracking of on the duplicate reply cache. |
172 | * The longest_chain* fields are modified with only the per-bucket |
173 | * cache lock, which isn't really safe and should be fixed if we want |
174 | * these statistics to be completely accurate. |
175 | */ |
176 | |
177 | /* total number of entries */ |
178 | atomic_t num_drc_entries; |
179 | |
180 | /* Per-netns stats counters */ |
181 | struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM]; |
182 | |
183 | /* sunrpc svc stats */ |
184 | struct svc_stat nfsd_svcstats; |
185 | |
186 | /* longest hash chain seen */ |
187 | unsigned int longest_chain; |
188 | |
189 | /* size of cache when we saw the longest hash chain */ |
190 | unsigned int longest_chain_cachesize; |
191 | |
192 | struct shrinker *nfsd_reply_cache_shrinker; |
193 | |
194 | /* tracking server-to-server copy mounts */ |
195 | spinlock_t nfsd_ssc_lock; |
196 | struct list_head nfsd_ssc_mount_list; |
197 | wait_queue_head_t nfsd_ssc_waitq; |
198 | |
199 | /* utsname taken from the process that starts the server */ |
200 | char nfsd_name[UNX_MAXNODENAME+1]; |
201 | |
202 | struct nfsd_fcache_disposal *fcache_disposal; |
203 | |
204 | siphash_key_t siphash_key; |
205 | |
206 | atomic_t nfs4_client_count; |
207 | int nfs4_max_clients; |
208 | |
209 | atomic_t nfsd_courtesy_clients; |
210 | struct shrinker *nfsd_client_shrinker; |
211 | struct work_struct nfsd_shrinker_work; |
212 | |
213 | /* last time an admin-revoke happened for NFSv4.0 */ |
214 | time64_t nfs40_last_revoke; |
215 | |
216 | }; |
217 | |
218 | /* Simple check to find out if a given net was properly initialized */ |
219 | #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) |
220 | |
221 | extern void nfsd_netns_free_versions(struct nfsd_net *nn); |
222 | |
223 | extern unsigned int nfsd_net_id; |
224 | |
225 | void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn); |
226 | void nfsd_reset_write_verifier(struct nfsd_net *nn); |
227 | #endif /* __NFSD_NETNS_H__ */ |
228 | |