1 /* 1 /*
2 * Copyright (c) 2001 The Regents of the Univ 2 * Copyright (c) 2001 The Regents of the University of Michigan.
3 * All rights reserved. 3 * All rights reserved.
4 * 4 *
5 * Kendrick Smith <kmsmith@umich.edu> 5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <andros@umich.edu> 6 * Andy Adamson <andros@umich.edu>
7 * 7 *
8 * Redistribution and use in source and binar 8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that 9 * modification, are permitted provided that the following conditions
10 * are met: 10 * are met:
11 * 11 *
12 * 1. Redistributions of source code must ret 12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the 13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must rep 14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the 15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials pr 16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor 17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or 18 * contributors may be used to endorse or promote products derived
19 * from this software without specific pri 19 * from this software without specific prior written permission.
20 * 20 *
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND AN 21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICUL 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS 24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPEC 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIA 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WA 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILI 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * 32 *
33 */ 33 */
34 34
35 #ifndef _NFSD4_STATE_H 35 #ifndef _NFSD4_STATE_H
36 #define _NFSD4_STATE_H 36 #define _NFSD4_STATE_H
37 37
38 #include <linux/idr.h> 38 #include <linux/idr.h>
39 #include <linux/refcount.h> 39 #include <linux/refcount.h>
40 #include <linux/sunrpc/svc_xprt.h> 40 #include <linux/sunrpc/svc_xprt.h>
41 #include "nfsfh.h" 41 #include "nfsfh.h"
42 #include "nfsd.h" 42 #include "nfsd.h"
43 43
44 typedef struct { 44 typedef struct {
45 u32 cl_boot; 45 u32 cl_boot;
46 u32 cl_id; 46 u32 cl_id;
47 } clientid_t; 47 } clientid_t;
48 48
49 typedef struct { 49 typedef struct {
50 clientid_t so_clid; 50 clientid_t so_clid;
51 u32 so_id; 51 u32 so_id;
52 } stateid_opaque_t; 52 } stateid_opaque_t;
53 53
54 typedef struct { 54 typedef struct {
55 u32 si_generation; 55 u32 si_generation;
56 stateid_opaque_t si_opaque; 56 stateid_opaque_t si_opaque;
57 } stateid_t; 57 } stateid_t;
58 58
59 typedef struct { 59 typedef struct {
60 stateid_t cs_stid; 60 stateid_t cs_stid;
61 #define NFS4_COPY_STID 1 61 #define NFS4_COPY_STID 1
62 #define NFS4_COPYNOTIFY_STID 2 62 #define NFS4_COPYNOTIFY_STID 2
63 unsigned char cs_type; 63 unsigned char cs_type;
64 refcount_t cs_count; 64 refcount_t cs_count;
65 } copy_stateid_t; 65 } copy_stateid_t;
66 66
67 struct nfsd4_callback { 67 struct nfsd4_callback {
68 struct nfs4_client *cb_clp; 68 struct nfs4_client *cb_clp;
69 struct rpc_message cb_msg; 69 struct rpc_message cb_msg;
70 const struct nfsd4_callback_ops *cb_op 70 const struct nfsd4_callback_ops *cb_ops;
71 struct work_struct cb_work; 71 struct work_struct cb_work;
72 int cb_seq_status; 72 int cb_seq_status;
73 int cb_status; 73 int cb_status;
74 bool cb_need_restart; 74 bool cb_need_restart;
75 bool cb_holds_slot; 75 bool cb_holds_slot;
76 }; 76 };
77 77
78 struct nfsd4_callback_ops { 78 struct nfsd4_callback_ops {
79 void (*prepare)(struct nfsd4_callback 79 void (*prepare)(struct nfsd4_callback *);
80 int (*done)(struct nfsd4_callback *, s 80 int (*done)(struct nfsd4_callback *, struct rpc_task *);
81 void (*release)(struct nfsd4_callback 81 void (*release)(struct nfsd4_callback *);
82 uint32_t opcode; <<
83 }; 82 };
84 83
85 /* 84 /*
86 * A core object that represents a "common" st 85 * A core object that represents a "common" stateid. These are generally
87 * embedded within the different (more specifi 86 * embedded within the different (more specific) stateid objects and contain
88 * fields that are of general use to any state 87 * fields that are of general use to any stateid.
89 */ 88 */
90 struct nfs4_stid { 89 struct nfs4_stid {
91 refcount_t sc_count; 90 refcount_t sc_count;
92 !! 91 #define NFS4_OPEN_STID 1
93 /* A new stateid is added to the cl_st !! 92 #define NFS4_LOCK_STID 2
94 * is fully initialised. Its sc_type !! 93 #define NFS4_DELEG_STID 4
95 * initialisation the sc_type it set u !! 94 /* For an open stateid kept around *only* to process close replays: */
96 * never changes. !! 95 #define NFS4_CLOSED_STID 8
97 */ <<
98 #define SC_TYPE_OPEN BIT(0) <<
99 #define SC_TYPE_LOCK BIT(1) <<
100 #define SC_TYPE_DELEG BIT(2) <<
101 #define SC_TYPE_LAYOUT BIT(3) <<
102 unsigned short sc_type; <<
103 <<
104 /* state_lock protects sc_status for delegatio <<
105 * ->cl_lock protects sc_status for open and l <<
106 * ->st_mutex also protect sc_status for open <<
107 * ->ls_lock protects sc_status for layout sta <<
108 */ <<
109 /* <<
110 * For an open stateid kept around *only* to p <<
111 * For deleg stateid, kept in idr until last r <<
112 */ <<
113 #define SC_STATUS_CLOSED BIT(0) <<
114 /* For a deleg stateid kept around only to pro 96 /* For a deleg stateid kept around only to process free_stateid's: */
115 #define SC_STATUS_REVOKED BIT(1) !! 97 #define NFS4_REVOKED_DELEG_STID 16
116 #define SC_STATUS_ADMIN_REVOKED BIT(2) !! 98 #define NFS4_CLOSED_DELEG_STID 32
117 #define SC_STATUS_FREEABLE BIT(3) !! 99 #define NFS4_LAYOUT_STID 64
118 #define SC_STATUS_FREED BIT(4) <<
119 unsigned short sc_status; <<
120 <<
121 struct list_head sc_cp_list; 100 struct list_head sc_cp_list;
>> 101 unsigned char sc_type;
122 stateid_t sc_stateid; 102 stateid_t sc_stateid;
123 spinlock_t sc_lock; 103 spinlock_t sc_lock;
124 struct nfs4_client *sc_client; 104 struct nfs4_client *sc_client;
125 struct nfs4_file *sc_file; 105 struct nfs4_file *sc_file;
126 void (*sc_free)(str 106 void (*sc_free)(struct nfs4_stid *);
127 }; 107 };
128 108
129 /* Keep a list of stateids issued by the COPY_ 109 /* Keep a list of stateids issued by the COPY_NOTIFY, associate it with the
130 * parent OPEN/LOCK/DELEG stateid. 110 * parent OPEN/LOCK/DELEG stateid.
131 */ 111 */
132 struct nfs4_cpntf_state { 112 struct nfs4_cpntf_state {
133 copy_stateid_t cp_stateid; 113 copy_stateid_t cp_stateid;
134 struct list_head cp_list; 114 struct list_head cp_list; /* per parent nfs4_stid */
135 stateid_t cp_p_stateid; 115 stateid_t cp_p_stateid; /* copy of parent's stateid */
136 clientid_t cp_p_clid; 116 clientid_t cp_p_clid; /* copy of parent's clid */
137 time64_t cpntf_time; 117 time64_t cpntf_time; /* last time stateid used */
138 }; 118 };
139 119
140 struct nfs4_cb_fattr { <<
141 struct nfsd4_callback ncf_getattr; <<
142 u32 ncf_cb_status; <<
143 u32 ncf_cb_bmap[1]; <<
144 <<
145 /* from CB_GETATTR reply */ <<
146 u64 ncf_cb_change; <<
147 u64 ncf_cb_fsize; <<
148 <<
149 unsigned long ncf_cb_flags; <<
150 bool ncf_file_modified; <<
151 u64 ncf_initial_cinfo; <<
152 u64 ncf_cur_fsize; <<
153 }; <<
154 <<
155 /* bits for ncf_cb_flags */ <<
156 #define CB_GETATTR_BUSY 0 <<
157 <<
158 /* 120 /*
159 * Represents a delegation stateid. The nfs4_c 121 * Represents a delegation stateid. The nfs4_client holds references to these
160 * and they are put when it is being destroyed 122 * and they are put when it is being destroyed or when the delegation is
161 * returned by the client: 123 * returned by the client:
162 * 124 *
163 * o 1 reference as long as a delegation is st 125 * o 1 reference as long as a delegation is still in force (taken when it's
164 * alloc'd, put when it's returned or revoke 126 * alloc'd, put when it's returned or revoked)
165 * 127 *
166 * o 1 reference as long as a recall rpc is in 128 * o 1 reference as long as a recall rpc is in progress (taken when the lease
167 * is broken, put when the rpc exits) 129 * is broken, put when the rpc exits)
168 * 130 *
169 * o 1 more ephemeral reference for each nfsd 131 * o 1 more ephemeral reference for each nfsd thread currently doing something
170 * with that delegation without holding the 132 * with that delegation without holding the cl_lock
171 * 133 *
172 * If the server attempts to recall a delegati 134 * If the server attempts to recall a delegation and the client doesn't do so
173 * before a timeout, the server may also revok 135 * before a timeout, the server may also revoke the delegation. In that case,
174 * the object will either be destroyed (v4.0) 136 * the object will either be destroyed (v4.0) or moved to a per-client list of
175 * revoked delegations (v4.1+). 137 * revoked delegations (v4.1+).
176 * 138 *
177 * This object is a superset of the nfs4_stid. 139 * This object is a superset of the nfs4_stid.
178 */ 140 */
179 struct nfs4_delegation { 141 struct nfs4_delegation {
180 struct nfs4_stid dl_stid; /* mu 142 struct nfs4_stid dl_stid; /* must be first field */
181 struct list_head dl_perfile; 143 struct list_head dl_perfile;
182 struct list_head dl_perclnt; 144 struct list_head dl_perclnt;
183 struct list_head dl_recall_lru; 145 struct list_head dl_recall_lru; /* delegation recalled */
184 struct nfs4_clnt_odstate *dl_clnt_odst 146 struct nfs4_clnt_odstate *dl_clnt_odstate;
185 u32 dl_type; 147 u32 dl_type;
186 time64_t dl_time; 148 time64_t dl_time;
187 /* For recall: */ 149 /* For recall: */
188 int dl_retries; 150 int dl_retries;
189 struct nfsd4_callback dl_recall; 151 struct nfsd4_callback dl_recall;
190 bool dl_recalled; 152 bool dl_recalled;
191 <<
192 /* for CB_GETATTR */ <<
193 struct nfs4_cb_fattr dl_cb_fattr; <<
194 }; 153 };
195 154
196 #define cb_to_delegation(cb) \ 155 #define cb_to_delegation(cb) \
197 container_of(cb, struct nfs4_delegatio 156 container_of(cb, struct nfs4_delegation, dl_recall)
198 157
199 /* client delegation callback info */ 158 /* client delegation callback info */
200 struct nfs4_cb_conn { 159 struct nfs4_cb_conn {
201 /* SETCLIENTID info */ 160 /* SETCLIENTID info */
202 struct sockaddr_storage cb_addr; 161 struct sockaddr_storage cb_addr;
203 struct sockaddr_storage cb_saddr; 162 struct sockaddr_storage cb_saddr;
204 size_t cb_addrlen; 163 size_t cb_addrlen;
205 u32 cb_prog; /* us 164 u32 cb_prog; /* used only in 4.0 case;
206 pe 165 per-session otherwise */
207 u32 cb_ident; 166 u32 cb_ident; /* minorversion 0 only */
208 struct svc_xprt *cb_xprt; 167 struct svc_xprt *cb_xprt; /* minorversion 1 only */
209 }; 168 };
210 169
211 static inline struct nfs4_delegation *delegsta 170 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
212 { 171 {
213 return container_of(s, struct nfs4_del 172 return container_of(s, struct nfs4_delegation, dl_stid);
214 } 173 }
215 174
216 /* Maximum number of slots per session. 160 is 175 /* Maximum number of slots per session. 160 is useful for long haul TCP */
217 #define NFSD_MAX_SLOTS_PER_SESSION 160 176 #define NFSD_MAX_SLOTS_PER_SESSION 160
>> 177 /* Maximum number of operations per session compound */
>> 178 #define NFSD_MAX_OPS_PER_COMPOUND 50
218 /* Maximum session per slot cache size */ 179 /* Maximum session per slot cache size */
219 #define NFSD_SLOT_CACHE_SIZE 2048 180 #define NFSD_SLOT_CACHE_SIZE 2048
220 /* Maximum number of NFSD_SLOT_CACHE_SIZE slot 181 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
221 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 182 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
222 #define NFSD_MAX_MEM_PER_SESSION \ 183 #define NFSD_MAX_MEM_PER_SESSION \
223 (NFSD_CACHE_SIZE_SLOTS_PER_SES 184 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
224 185
225 struct nfsd4_slot { 186 struct nfsd4_slot {
226 u32 sl_seqid; 187 u32 sl_seqid;
227 __be32 sl_status; 188 __be32 sl_status;
228 struct svc_cred sl_cred; 189 struct svc_cred sl_cred;
229 u32 sl_datalen; 190 u32 sl_datalen;
230 u16 sl_opcnt; 191 u16 sl_opcnt;
231 #define NFSD4_SLOT_INUSE (1 << 0) 192 #define NFSD4_SLOT_INUSE (1 << 0)
232 #define NFSD4_SLOT_CACHETHIS (1 << 1) 193 #define NFSD4_SLOT_CACHETHIS (1 << 1)
233 #define NFSD4_SLOT_INITIALIZED (1 << 2) 194 #define NFSD4_SLOT_INITIALIZED (1 << 2)
234 #define NFSD4_SLOT_CACHED (1 << 3) 195 #define NFSD4_SLOT_CACHED (1 << 3)
235 u8 sl_flags; 196 u8 sl_flags;
236 char sl_data[]; 197 char sl_data[];
237 }; 198 };
238 199
239 struct nfsd4_channel_attrs { 200 struct nfsd4_channel_attrs {
240 u32 headerpadsz; 201 u32 headerpadsz;
241 u32 maxreq_sz; 202 u32 maxreq_sz;
242 u32 maxresp_sz; 203 u32 maxresp_sz;
243 u32 maxresp_cached; 204 u32 maxresp_cached;
244 u32 maxops; 205 u32 maxops;
245 u32 maxreqs; 206 u32 maxreqs;
246 u32 nr_rdma_attrs; 207 u32 nr_rdma_attrs;
247 u32 rdma_attrs; 208 u32 rdma_attrs;
248 }; 209 };
249 210
250 struct nfsd4_cb_sec { 211 struct nfsd4_cb_sec {
251 u32 flavor; /* (u32)(-1) used to m 212 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
252 kuid_t uid; 213 kuid_t uid;
253 kgid_t gid; 214 kgid_t gid;
254 }; 215 };
255 216
256 struct nfsd4_create_session { 217 struct nfsd4_create_session {
257 clientid_t client 218 clientid_t clientid;
258 struct nfs4_sessionid sessio 219 struct nfs4_sessionid sessionid;
259 u32 seqid; 220 u32 seqid;
260 u32 flags; 221 u32 flags;
261 struct nfsd4_channel_attrs fore_c 222 struct nfsd4_channel_attrs fore_channel;
262 struct nfsd4_channel_attrs back_c 223 struct nfsd4_channel_attrs back_channel;
263 u32 callba 224 u32 callback_prog;
264 struct nfsd4_cb_sec cb_sec 225 struct nfsd4_cb_sec cb_sec;
265 }; 226 };
266 227
267 struct nfsd4_backchannel_ctl { 228 struct nfsd4_backchannel_ctl {
268 u32 bc_cb_program; 229 u32 bc_cb_program;
269 struct nfsd4_cb_sec bc_cb_ 230 struct nfsd4_cb_sec bc_cb_sec;
270 }; 231 };
271 232
272 struct nfsd4_bind_conn_to_session { 233 struct nfsd4_bind_conn_to_session {
273 struct nfs4_sessionid sessio 234 struct nfs4_sessionid sessionid;
274 u32 dir; 235 u32 dir;
275 }; 236 };
276 237
277 /* The single slot clientid cache structure */ 238 /* The single slot clientid cache structure */
278 struct nfsd4_clid_slot { 239 struct nfsd4_clid_slot {
279 u32 sl_seq 240 u32 sl_seqid;
280 __be32 sl_sta 241 __be32 sl_status;
281 struct nfsd4_create_session sl_cr_ 242 struct nfsd4_create_session sl_cr_ses;
282 }; 243 };
283 244
284 struct nfsd4_conn { 245 struct nfsd4_conn {
285 struct list_head cn_persession; 246 struct list_head cn_persession;
286 struct svc_xprt *cn_xprt; 247 struct svc_xprt *cn_xprt;
287 struct svc_xpt_user cn_xpt_user; 248 struct svc_xpt_user cn_xpt_user;
288 struct nfsd4_session *cn_session; 249 struct nfsd4_session *cn_session;
289 /* CDFC4_FORE, CDFC4_BACK: */ 250 /* CDFC4_FORE, CDFC4_BACK: */
290 unsigned char cn_flags; 251 unsigned char cn_flags;
291 }; 252 };
292 253
293 /* 254 /*
294 * Representation of a v4.1+ session. These ar 255 * Representation of a v4.1+ session. These are refcounted in a similar fashion
295 * to the nfs4_client. References are only tak 256 * to the nfs4_client. References are only taken when the server is actively
296 * working on the object (primarily during the 257 * working on the object (primarily during the processing of compounds).
297 */ 258 */
298 struct nfsd4_session { 259 struct nfsd4_session {
299 atomic_t se_ref; 260 atomic_t se_ref;
300 struct list_head se_hash; 261 struct list_head se_hash; /* hash by sessionid */
301 struct list_head se_perclnt; 262 struct list_head se_perclnt;
302 /* See SESSION4_PERSIST, etc. for standard fla 263 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
303 #define NFS4_SESSION_DEAD 0x010 264 #define NFS4_SESSION_DEAD 0x010
304 u32 se_flags; 265 u32 se_flags;
305 struct nfs4_client *se_client; 266 struct nfs4_client *se_client;
306 struct nfs4_sessionid se_sessionid; 267 struct nfs4_sessionid se_sessionid;
307 struct nfsd4_channel_attrs se_fchannel 268 struct nfsd4_channel_attrs se_fchannel;
308 struct nfsd4_channel_attrs se_bchannel 269 struct nfsd4_channel_attrs se_bchannel;
309 struct nfsd4_cb_sec se_cb_sec; 270 struct nfsd4_cb_sec se_cb_sec;
310 struct list_head se_conns; 271 struct list_head se_conns;
311 u32 se_cb_prog; 272 u32 se_cb_prog;
312 u32 se_cb_seq_nr; 273 u32 se_cb_seq_nr;
313 struct nfsd4_slot *se_slots[]; 274 struct nfsd4_slot *se_slots[]; /* forward channel slots */
314 }; 275 };
315 276
316 /* formatted contents of nfs4_sessionid */ 277 /* formatted contents of nfs4_sessionid */
317 struct nfsd4_sessionid { 278 struct nfsd4_sessionid {
318 clientid_t clientid; 279 clientid_t clientid;
319 u32 sequence; 280 u32 sequence;
320 u32 reserved; 281 u32 reserved;
321 }; 282 };
322 283
323 #define HEXDIR_LEN 33 /* hex version of 16 284 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
324 285
325 /* 286 /*
326 * State Meaning 287 * State Meaning Where set
327 * ------------------------------------------- 288 * --------------------------------------------------------------------------
328 * | NFSD4_ACTIVE | Confirmed, active 289 * | NFSD4_ACTIVE | Confirmed, active | Default |
329 * |------------------- ---------------------- 290 * |------------------- ----------------------------------------------------|
330 * | NFSD4_COURTESY | Courtesy state. 291 * | NFSD4_COURTESY | Courtesy state. | nfs4_get_client_reaplist |
331 * | | Lease/lock/share 292 * | | Lease/lock/share | |
332 * | | reservation conflict 293 * | | reservation conflict | |
333 * | | can cause Courtesy 294 * | | can cause Courtesy | |
334 * | | client to be expired 295 * | | client to be expired | |
335 * |------------------------------------------ 296 * |------------------------------------------------------------------------|
336 * | NFSD4_EXPIRABLE | Courtesy client to be 297 * | NFSD4_EXPIRABLE | Courtesy client to be| nfs4_laundromat |
337 * | | expired by Laundromat 298 * | | expired by Laundromat| try_to_expire_client |
338 * | | due to conflict 299 * | | due to conflict | |
339 * |------------------------------------------ 300 * |------------------------------------------------------------------------|
340 */ 301 */
341 enum { 302 enum {
342 NFSD4_ACTIVE = 0, 303 NFSD4_ACTIVE = 0,
343 NFSD4_COURTESY, 304 NFSD4_COURTESY,
344 NFSD4_EXPIRABLE, 305 NFSD4_EXPIRABLE,
345 }; 306 };
346 307
347 /* 308 /*
348 * struct nfs4_client - one per client. Clien 309 * struct nfs4_client - one per client. Clientids live here.
349 * 310 *
350 * The initial object created by an NFS client 311 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
351 * or EXCHANGE_ID (for NFSv4.1+). These object 312 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
352 * Each nfsd_net_ns object contains a set of t 313 * Each nfsd_net_ns object contains a set of these and they are tracked via
353 * short and long form clientid. They are hash 314 * short and long form clientid. They are hashed and searched for under the
354 * per-nfsd_net client_lock spinlock. 315 * per-nfsd_net client_lock spinlock.
355 * 316 *
356 * References to it are only held during the p 317 * References to it are only held during the processing of compounds, and in
357 * certain other operations. In their "resting 318 * certain other operations. In their "resting state" they have a refcount of
358 * 0. If they are not renewed within a lease p 319 * 0. If they are not renewed within a lease period, they become eligible for
359 * destruction by the laundromat. 320 * destruction by the laundromat.
360 * 321 *
361 * These objects can also be destroyed if the !! 322 * These objects can also be destroyed prematurely by the fault injection code,
362 * SETCLIENTID or EXCHANGE_ID operations. !! 323 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates.
363 * <<
364 * Care is taken *not* to do this however when 324 * Care is taken *not* to do this however when the objects have an elevated
365 * refcount. 325 * refcount.
366 * 326 *
367 * o Each nfs4_client is hashed by clientid 327 * o Each nfs4_client is hashed by clientid
368 * 328 *
369 * o Each nfs4_clients is also hashed by name 329 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
370 * sent by the client to identify itself). 330 * sent by the client to identify itself).
371 * !! 331 *
372 * o cl_perclient list is used to ensure no da 332 * o cl_perclient list is used to ensure no dangling stateowner references
373 * when we expire the nfs4_client 333 * when we expire the nfs4_client
374 */ 334 */
375 struct nfs4_client { 335 struct nfs4_client {
376 struct list_head cl_idhash; 336 struct list_head cl_idhash; /* hash by cl_clientid.id */
377 struct rb_node cl_namenode; 337 struct rb_node cl_namenode; /* link into by-name trees */
378 struct list_head *cl_ownerstr_h 338 struct list_head *cl_ownerstr_hashtbl;
379 struct list_head cl_openowners; 339 struct list_head cl_openowners;
380 struct idr cl_stateids; 340 struct idr cl_stateids; /* stateid lookup */
381 struct list_head cl_delegations 341 struct list_head cl_delegations;
382 struct list_head cl_revoked; 342 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
383 struct list_head cl_lru; 343 struct list_head cl_lru; /* tail queue */
384 #ifdef CONFIG_NFSD_PNFS 344 #ifdef CONFIG_NFSD_PNFS
385 struct list_head cl_lo_states; 345 struct list_head cl_lo_states; /* outstanding layout states */
386 #endif 346 #endif
387 struct xdr_netobj cl_name; 347 struct xdr_netobj cl_name; /* id generated by client */
388 nfs4_verifier cl_verifier; 348 nfs4_verifier cl_verifier; /* generated by client */
389 time64_t cl_time; 349 time64_t cl_time; /* time of last lease renewal */
390 struct sockaddr_storage cl_addr; 350 struct sockaddr_storage cl_addr; /* client ipaddress */
391 bool cl_mach_cred; 351 bool cl_mach_cred; /* SP4_MACH_CRED in force */
392 struct svc_cred cl_cred; 352 struct svc_cred cl_cred; /* setclientid principal */
393 clientid_t cl_clientid; 353 clientid_t cl_clientid; /* generated by server */
394 nfs4_verifier cl_confirm; 354 nfs4_verifier cl_confirm; /* generated by server */
395 u32 cl_minorversio 355 u32 cl_minorversion;
396 atomic_t cl_admin_revok <<
397 /* NFSv4.1 client implementation id: * 356 /* NFSv4.1 client implementation id: */
398 struct xdr_netobj cl_nii_domain; 357 struct xdr_netobj cl_nii_domain;
399 struct xdr_netobj cl_nii_name; 358 struct xdr_netobj cl_nii_name;
400 struct timespec64 cl_nii_time; 359 struct timespec64 cl_nii_time;
401 360
402 /* for v4.0 and v4.1 callbacks: */ 361 /* for v4.0 and v4.1 callbacks: */
403 struct nfs4_cb_conn cl_cb_conn; 362 struct nfs4_cb_conn cl_cb_conn;
404 #define NFSD4_CLIENT_CB_UPDATE (0) 363 #define NFSD4_CLIENT_CB_UPDATE (0)
405 #define NFSD4_CLIENT_CB_KILL (1) 364 #define NFSD4_CLIENT_CB_KILL (1)
406 #define NFSD4_CLIENT_STABLE (2) 365 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
407 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) 366 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
408 #define NFSD4_CLIENT_CONFIRMED (4) 367 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
409 #define NFSD4_CLIENT_UPCALL_LOCK (5) 368 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
410 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << 369 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
411 1 << 370 1 << NFSD4_CLIENT_CB_KILL)
412 #define NFSD4_CLIENT_CB_RECALL_ANY (6) 371 #define NFSD4_CLIENT_CB_RECALL_ANY (6)
413 unsigned long cl_flags; 372 unsigned long cl_flags;
414 <<
415 struct workqueue_struct *cl_callback_w <<
416 const struct cred *cl_cb_cred; 373 const struct cred *cl_cb_cred;
417 struct rpc_clnt *cl_cb_client; 374 struct rpc_clnt *cl_cb_client;
418 u32 cl_cb_ident; 375 u32 cl_cb_ident;
419 #define NFSD4_CB_UP 0 376 #define NFSD4_CB_UP 0
420 #define NFSD4_CB_UNKNOWN 1 377 #define NFSD4_CB_UNKNOWN 1
421 #define NFSD4_CB_DOWN 2 378 #define NFSD4_CB_DOWN 2
422 #define NFSD4_CB_FAULT 3 379 #define NFSD4_CB_FAULT 3
423 int cl_cb_state; 380 int cl_cb_state;
424 struct nfsd4_callback cl_cb_null; 381 struct nfsd4_callback cl_cb_null;
425 struct nfsd4_session *cl_cb_session 382 struct nfsd4_session *cl_cb_session;
426 383
427 /* for all client information that cal 384 /* for all client information that callback code might need: */
428 spinlock_t cl_lock; 385 spinlock_t cl_lock;
429 386
430 /* for nfs41 */ 387 /* for nfs41 */
431 struct list_head cl_sessions; 388 struct list_head cl_sessions;
432 struct nfsd4_clid_slot cl_cs_slot; 389 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
433 u32 cl_exchange_fl 390 u32 cl_exchange_flags;
434 /* number of rpc's in progress over an 391 /* number of rpc's in progress over an associated session: */
435 atomic_t cl_rpc_users; 392 atomic_t cl_rpc_users;
436 struct nfsdfs_client cl_nfsdfs; 393 struct nfsdfs_client cl_nfsdfs;
437 struct nfs4_op_map cl_spo_must_al 394 struct nfs4_op_map cl_spo_must_allow;
438 395
439 /* debugging info directory under nfsd 396 /* debugging info directory under nfsd/clients/ : */
440 struct dentry *cl_nfsd_dentr 397 struct dentry *cl_nfsd_dentry;
441 /* 'info' file within that directory. 398 /* 'info' file within that directory. Ref is not counted,
442 * but will remain valid iff cl_nfsd_d 399 * but will remain valid iff cl_nfsd_dentry != NULL
443 */ 400 */
444 struct dentry *cl_nfsd_info_ 401 struct dentry *cl_nfsd_info_dentry;
445 402
446 /* for nfs41 callbacks */ 403 /* for nfs41 callbacks */
447 /* We currently support a single back 404 /* We currently support a single back channel with a single slot */
448 unsigned long cl_cb_slot_bus 405 unsigned long cl_cb_slot_busy;
449 struct rpc_wait_queue cl_cb_waitq; 406 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
450 407 /* wait here for slots */
451 struct net *net; 408 struct net *net;
452 struct list_head async_copies; 409 struct list_head async_copies; /* list of async copies */
453 spinlock_t async_lock; 410 spinlock_t async_lock; /* lock for async copies */
454 atomic_t cl_cb_inflight 411 atomic_t cl_cb_inflight; /* Outstanding callbacks */
455 412
456 unsigned int cl_state; 413 unsigned int cl_state;
457 atomic_t cl_delegs_in_r 414 atomic_t cl_delegs_in_recall;
458 415
459 struct nfsd4_cb_recall_any *cl_ra 416 struct nfsd4_cb_recall_any *cl_ra;
460 time64_t cl_ra_time; 417 time64_t cl_ra_time;
461 struct list_head cl_ra_cblist; 418 struct list_head cl_ra_cblist;
462 }; 419 };
463 420
464 /* struct nfs4_client_reset 421 /* struct nfs4_client_reset
465 * one per old client. Populates reset_str_has 422 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
466 * upon lease reset, or from upcall to state_d 423 * upon lease reset, or from upcall to state_daemon (to read in state
467 * from non-volitile storage) upon reboot. 424 * from non-volitile storage) upon reboot.
468 */ 425 */
469 struct nfs4_client_reclaim { 426 struct nfs4_client_reclaim {
470 struct list_head cr_strhash; 427 struct list_head cr_strhash; /* hash by cr_name */
471 struct nfs4_client *cr_clp; 428 struct nfs4_client *cr_clp; /* pointer to associated clp */
472 struct xdr_netobj cr_name; 429 struct xdr_netobj cr_name; /* recovery dir name */
473 struct xdr_netobj cr_princhash; 430 struct xdr_netobj cr_princhash;
474 }; 431 };
475 432
476 /* A reasonable value for REPLAY_ISIZE was est 433 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
477 * The OPEN response, typically the largest, r 434 * The OPEN response, typically the largest, requires
478 * 4(status) + 8(stateid) + 20(changeinfo) + 435 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
479 * 4(deleg. type) + 8(deleg. stateid) + 4(de 436 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
480 * 20(deleg. space limit) + ~32(deleg. ace) 437 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
481 */ 438 */
482 439
483 #define NFSD4_REPLAY_ISIZE 112 440 #define NFSD4_REPLAY_ISIZE 112
484 441
485 /* 442 /*
486 * Replay buffer, where the result of the last 443 * Replay buffer, where the result of the last seqid-mutating operation
487 * is cached. 444 * is cached.
488 */ 445 */
489 struct nfs4_replay { 446 struct nfs4_replay {
490 __be32 rp_status; 447 __be32 rp_status;
491 unsigned int rp_buflen; 448 unsigned int rp_buflen;
492 char *rp_buf; 449 char *rp_buf;
493 struct knfsd_fh rp_openfh; 450 struct knfsd_fh rp_openfh;
494 atomic_t rp_locked; !! 451 struct mutex rp_mutex;
495 char rp_ibuf[NFSD4_ 452 char rp_ibuf[NFSD4_REPLAY_ISIZE];
496 }; 453 };
497 454
498 struct nfs4_stateowner; 455 struct nfs4_stateowner;
499 456
500 struct nfs4_stateowner_operations { 457 struct nfs4_stateowner_operations {
501 void (*so_unhash)(struct nfs4_stateown 458 void (*so_unhash)(struct nfs4_stateowner *);
502 void (*so_free)(struct nfs4_stateowner 459 void (*so_free)(struct nfs4_stateowner *);
503 }; 460 };
504 461
505 /* 462 /*
506 * A core object that represents either an ope 463 * A core object that represents either an open or lock owner. The object and
507 * lock owner objects have one of these embedd 464 * lock owner objects have one of these embedded within them. Refcounts and
508 * other fields common to both owner types are 465 * other fields common to both owner types are contained within these
509 * structures. 466 * structures.
510 */ 467 */
511 struct nfs4_stateowner { 468 struct nfs4_stateowner {
512 struct list_head 469 struct list_head so_strhash;
513 struct list_head 470 struct list_head so_stateids;
514 struct nfs4_client 471 struct nfs4_client *so_client;
515 const struct nfs4_stateowner_operation 472 const struct nfs4_stateowner_operations *so_ops;
516 /* after increment in nfsd4_bump_seqid 473 /* after increment in nfsd4_bump_seqid, represents the next
517 * sequence id expected from the clien 474 * sequence id expected from the client: */
518 atomic_t 475 atomic_t so_count;
519 u32 476 u32 so_seqid;
520 struct xdr_netobj 477 struct xdr_netobj so_owner; /* open owner name */
521 struct nfs4_replay 478 struct nfs4_replay so_replay;
522 bool 479 bool so_is_open_owner;
523 }; 480 };
524 481
525 /* 482 /*
526 * When a file is opened, the client provides 483 * When a file is opened, the client provides an open state owner opaque string
527 * that indicates the "owner" of that open. Th 484 * that indicates the "owner" of that open. These objects are refcounted.
528 * References to it are held by each open stat 485 * References to it are held by each open state associated with it. This object
529 * is a superset of the nfs4_stateowner struct 486 * is a superset of the nfs4_stateowner struct.
530 */ 487 */
531 struct nfs4_openowner { 488 struct nfs4_openowner {
532 struct nfs4_stateowner oo_owner; /* m 489 struct nfs4_stateowner oo_owner; /* must be first field */
533 struct list_head oo_perclient; 490 struct list_head oo_perclient;
534 /* 491 /*
535 * We keep around openowners a little 492 * We keep around openowners a little while after last close,
536 * which saves clients from having to 493 * which saves clients from having to confirm, and allows us to
537 * handle close replays if they come s 494 * handle close replays if they come soon enough. The close_lru
538 * is a list of such openowners, to be 495 * is a list of such openowners, to be reaped by the laundromat
539 * thread eventually if they remain un 496 * thread eventually if they remain unused:
540 */ 497 */
541 struct list_head oo_close_lru; 498 struct list_head oo_close_lru;
542 struct nfs4_ol_stateid *oo_last_closed 499 struct nfs4_ol_stateid *oo_last_closed_stid;
543 time64_t oo_time; /* ti 500 time64_t oo_time; /* time of placement on so_close_lru */
544 #define NFS4_OO_CONFIRMED 1 501 #define NFS4_OO_CONFIRMED 1
545 unsigned char oo_flags; 502 unsigned char oo_flags;
546 }; 503 };
547 504
548 /* 505 /*
549 * Represents a generic "lockowner". Similar t 506 * Represents a generic "lockowner". Similar to an openowner. References to it
550 * are held by the lock stateids that are crea 507 * are held by the lock stateids that are created on its behalf. This object is
551 * a superset of the nfs4_stateowner struct. 508 * a superset of the nfs4_stateowner struct.
552 */ 509 */
553 struct nfs4_lockowner { 510 struct nfs4_lockowner {
554 struct nfs4_stateowner lo_owner; 511 struct nfs4_stateowner lo_owner; /* must be first element */
555 struct list_head lo_blocked; 512 struct list_head lo_blocked; /* blocked file_locks */
556 }; 513 };
557 514
558 static inline struct nfs4_openowner * openowne 515 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
559 { 516 {
560 return container_of(so, struct nfs4_op 517 return container_of(so, struct nfs4_openowner, oo_owner);
561 } 518 }
562 519
563 static inline struct nfs4_lockowner * lockowne 520 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
564 { 521 {
565 return container_of(so, struct nfs4_lo 522 return container_of(so, struct nfs4_lockowner, lo_owner);
566 } 523 }
567 524
568 /* 525 /*
569 * Per-client state indicating no. of opens an 526 * Per-client state indicating no. of opens and outstanding delegations
570 * on a file from a particular client.'od' sta 527 * on a file from a particular client.'od' stands for 'open & delegation'
571 */ 528 */
572 struct nfs4_clnt_odstate { 529 struct nfs4_clnt_odstate {
573 struct nfs4_client *co_client; 530 struct nfs4_client *co_client;
574 struct nfs4_file *co_file; 531 struct nfs4_file *co_file;
575 struct list_head co_perfile; 532 struct list_head co_perfile;
576 refcount_t co_odcount; 533 refcount_t co_odcount;
577 }; 534 };
578 535
579 /* 536 /*
580 * nfs4_file: a file opened by some number of 537 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
581 * 538 *
582 * These objects are global. nfsd keeps one in 539 * These objects are global. nfsd keeps one instance of a nfs4_file per
583 * filehandle (though it may keep multiple fil 540 * filehandle (though it may keep multiple file descriptors for each). Each
584 * inode can have multiple filehandles associa 541 * inode can have multiple filehandles associated with it, so there is
585 * (potentially) a many to one relationship be 542 * (potentially) a many to one relationship between this struct and struct
586 * inode. 543 * inode.
587 */ 544 */
588 struct nfs4_file { 545 struct nfs4_file {
589 refcount_t fi_ref; 546 refcount_t fi_ref;
590 struct inode * fi_inode; 547 struct inode * fi_inode;
591 bool fi_aliased; 548 bool fi_aliased;
592 spinlock_t fi_lock; 549 spinlock_t fi_lock;
593 struct rhlist_head fi_rlist; 550 struct rhlist_head fi_rlist;
594 struct list_head fi_stateids; 551 struct list_head fi_stateids;
595 union { 552 union {
596 struct list_head fi_del 553 struct list_head fi_delegations;
597 struct rcu_head fi_rcu 554 struct rcu_head fi_rcu;
598 }; 555 };
599 struct list_head fi_clnt_odstat 556 struct list_head fi_clnt_odstate;
600 /* One each for O_RDONLY, O_WRONLY, O_ 557 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
601 struct nfsd_file *fi_fds[3]; 558 struct nfsd_file *fi_fds[3];
602 /* 559 /*
603 * Each open or lock stateid contribut 560 * Each open or lock stateid contributes 0-4 to the counts
604 * below depending on which bits are s 561 * below depending on which bits are set in st_access_bitmap:
605 * 1 to fi_access[O_RDONLY] if NFS 562 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
606 * + 1 to fi_access[O_WRONLY] if NFS 563 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
607 * + 1 to both of the above if NFS4_ 564 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
608 */ 565 */
609 atomic_t fi_access[2]; 566 atomic_t fi_access[2];
610 u32 fi_share_deny; 567 u32 fi_share_deny;
611 struct nfsd_file *fi_deleg_file 568 struct nfsd_file *fi_deleg_file;
612 int fi_delegees; 569 int fi_delegees;
613 struct knfsd_fh fi_fhandle; 570 struct knfsd_fh fi_fhandle;
614 bool fi_had_conflic 571 bool fi_had_conflict;
615 #ifdef CONFIG_NFSD_PNFS 572 #ifdef CONFIG_NFSD_PNFS
616 struct list_head fi_lo_states; 573 struct list_head fi_lo_states;
617 atomic_t fi_lo_recalls; 574 atomic_t fi_lo_recalls;
618 #endif 575 #endif
619 }; 576 };
620 577
621 /* 578 /*
622 * A generic struct representing either a open 579 * A generic struct representing either a open or lock stateid. The nfs4_client
623 * holds a reference to each of these objects, 580 * holds a reference to each of these objects, and they in turn hold a
624 * reference to their respective stateowners. 581 * reference to their respective stateowners. The client's reference is
625 * released in response to a close or unlock ( 582 * released in response to a close or unlock (depending on whether it's an open
626 * or lock stateid) or when the client is bein 583 * or lock stateid) or when the client is being destroyed.
627 * 584 *
628 * In the case of v4.0 open stateids, these ob 585 * In the case of v4.0 open stateids, these objects are preserved for a little
629 * while after close in order to handle CLOSE 586 * while after close in order to handle CLOSE replays. Those are eventually
630 * reclaimed via a LRU scheme by the laundroma 587 * reclaimed via a LRU scheme by the laundromat.
631 * 588 *
632 * This object is a superset of the nfs4_stid. 589 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
633 * Better suggestions welcome. 590 * Better suggestions welcome.
634 */ 591 */
635 struct nfs4_ol_stateid { 592 struct nfs4_ol_stateid {
636 struct nfs4_stid st_sti 593 struct nfs4_stid st_stid;
637 struct list_head st_per 594 struct list_head st_perfile;
638 struct list_head st_per 595 struct list_head st_perstateowner;
639 struct list_head st_loc 596 struct list_head st_locks;
640 struct nfs4_stateowner *st_st 597 struct nfs4_stateowner *st_stateowner;
641 struct nfs4_clnt_odstate *st_cl 598 struct nfs4_clnt_odstate *st_clnt_odstate;
642 /* 599 /*
643 * These bitmasks use 3 separate bits for READ 600 * These bitmasks use 3 separate bits for READ, ALLOW, and BOTH; see the
644 * comment above bmap_to_share_mode() for expl 601 * comment above bmap_to_share_mode() for explanation:
645 */ 602 */
646 unsigned char st_acc 603 unsigned char st_access_bmap;
647 unsigned char st_den 604 unsigned char st_deny_bmap;
648 struct nfs4_ol_stateid *st_op 605 struct nfs4_ol_stateid *st_openstp;
649 struct mutex st_mut 606 struct mutex st_mutex;
650 }; 607 };
651 608
652 static inline struct nfs4_ol_stateid *openlock 609 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
653 { 610 {
654 return container_of(s, struct nfs4_ol_ 611 return container_of(s, struct nfs4_ol_stateid, st_stid);
655 } 612 }
656 613
657 struct nfs4_layout_stateid { 614 struct nfs4_layout_stateid {
658 struct nfs4_stid ls_sti 615 struct nfs4_stid ls_stid;
659 struct list_head ls_per 616 struct list_head ls_perclnt;
660 struct list_head ls_per 617 struct list_head ls_perfile;
661 spinlock_t ls_loc 618 spinlock_t ls_lock;
662 struct list_head ls_lay 619 struct list_head ls_layouts;
663 u32 ls_lay 620 u32 ls_layout_type;
664 struct nfsd_file *ls_fi 621 struct nfsd_file *ls_file;
665 struct nfsd4_callback ls_rec 622 struct nfsd4_callback ls_recall;
666 stateid_t ls_rec 623 stateid_t ls_recall_sid;
667 bool ls_rec 624 bool ls_recalled;
668 struct mutex ls_mut 625 struct mutex ls_mutex;
669 }; 626 };
670 627
671 static inline struct nfs4_layout_stateid *layo 628 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
672 { 629 {
673 return container_of(s, struct nfs4_lay 630 return container_of(s, struct nfs4_layout_stateid, ls_stid);
674 } 631 }
675 632
676 /* flags for preprocess_seqid_op() */ 633 /* flags for preprocess_seqid_op() */
677 #define RD_STATE 0x00000010 634 #define RD_STATE 0x00000010
678 #define WR_STATE 0x00000020 635 #define WR_STATE 0x00000020
679 636
680 enum nfsd4_cb_op { 637 enum nfsd4_cb_op {
681 NFSPROC4_CLNT_CB_NULL = 0, 638 NFSPROC4_CLNT_CB_NULL = 0,
682 NFSPROC4_CLNT_CB_RECALL, 639 NFSPROC4_CLNT_CB_RECALL,
683 NFSPROC4_CLNT_CB_LAYOUT, 640 NFSPROC4_CLNT_CB_LAYOUT,
684 NFSPROC4_CLNT_CB_OFFLOAD, 641 NFSPROC4_CLNT_CB_OFFLOAD,
685 NFSPROC4_CLNT_CB_SEQUENCE, 642 NFSPROC4_CLNT_CB_SEQUENCE,
686 NFSPROC4_CLNT_CB_NOTIFY_LOCK, 643 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
687 NFSPROC4_CLNT_CB_RECALL_ANY, 644 NFSPROC4_CLNT_CB_RECALL_ANY,
688 NFSPROC4_CLNT_CB_GETATTR, <<
689 }; 645 };
690 646
691 /* Returns true iff a is later than b: */ 647 /* Returns true iff a is later than b: */
692 static inline bool nfsd4_stateid_generation_af 648 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
693 { 649 {
694 return (s32)(a->si_generation - b->si_ 650 return (s32)(a->si_generation - b->si_generation) > 0;
695 } 651 }
696 652
697 /* 653 /*
698 * When a client tries to get a lock on a file 654 * When a client tries to get a lock on a file, we set one of these objects
699 * on the blocking lock. When the lock becomes 655 * on the blocking lock. When the lock becomes free, we can then issue a
700 * CB_NOTIFY_LOCK to the server. 656 * CB_NOTIFY_LOCK to the server.
701 */ 657 */
702 struct nfsd4_blocked_lock { 658 struct nfsd4_blocked_lock {
703 struct list_head nbl_list; 659 struct list_head nbl_list;
704 struct list_head nbl_lru; 660 struct list_head nbl_lru;
705 time64_t nbl_time; 661 time64_t nbl_time;
706 struct file_lock nbl_lock; 662 struct file_lock nbl_lock;
707 struct knfsd_fh nbl_fh; 663 struct knfsd_fh nbl_fh;
708 struct nfsd4_callback nbl_cb; 664 struct nfsd4_callback nbl_cb;
709 struct kref nbl_kref; 665 struct kref nbl_kref;
710 }; 666 };
711 667
712 struct nfsd4_compound_state; 668 struct nfsd4_compound_state;
713 struct nfsd_net; 669 struct nfsd_net;
714 struct nfsd4_copy; 670 struct nfsd4_copy;
715 671
716 extern __be32 nfs4_preprocess_stateid_op(struc 672 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
717 struct nfsd4_compound_state *c 673 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
718 stateid_t *stateid, int flags, 674 stateid_t *stateid, int flags, struct nfsd_file **filp,
719 struct nfs4_stid **cstid); 675 struct nfs4_stid **cstid);
720 __be32 nfsd4_lookup_stateid(struct nfsd4_compo 676 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
721 stateid_t *stateid !! 677 stateid_t *stateid, unsigned char typemask,
722 unsigned short sta !! 678 struct nfs4_stid **s, struct nfsd_net *nn);
723 struct nfs4_stid * <<
724 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_ 679 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
725 void (*sc_fr 680 void (*sc_free)(struct nfs4_stid *));
726 int nfs4_init_copy_state(struct nfsd_net *nn, 681 int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
727 void nfs4_free_copy_state(struct nfsd4_copy *c 682 void nfs4_free_copy_state(struct nfsd4_copy *copy);
728 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf 683 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
729 struct nfs4_stid *p_st 684 struct nfs4_stid *p_stid);
>> 685 void nfs4_unhash_stid(struct nfs4_stid *s);
730 void nfs4_put_stid(struct nfs4_stid *s); 686 void nfs4_put_stid(struct nfs4_stid *s);
731 void nfs4_inc_and_copy_stateid(stateid_t *dst, 687 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
732 void nfs4_remove_reclaim_record(struct nfs4_cl 688 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
733 extern void nfs4_release_reclaim(struct nfsd_n 689 extern void nfs4_release_reclaim(struct nfsd_net *);
734 extern struct nfs4_client_reclaim *nfsd4_find_ 690 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
735 691 struct nfsd_net *nn);
736 extern __be32 nfs4_check_open_reclaim(struct n 692 extern __be32 nfs4_check_open_reclaim(struct nfs4_client *);
737 extern void nfsd4_probe_callback(struct nfs4_c 693 extern void nfsd4_probe_callback(struct nfs4_client *clp);
738 extern void nfsd4_probe_callback_sync(struct n 694 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
739 extern void nfsd4_change_callback(struct nfs4_ 695 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
740 extern void nfsd4_init_cb(struct nfsd4_callbac 696 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
741 const struct nfsd4_callback_op 697 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
742 extern bool nfsd4_run_cb(struct nfsd4_callback 698 extern bool nfsd4_run_cb(struct nfsd4_callback *cb);
>> 699 extern int nfsd4_create_callback_queue(void);
>> 700 extern void nfsd4_destroy_callback_queue(void);
743 extern void nfsd4_shutdown_callback(struct nfs 701 extern void nfsd4_shutdown_callback(struct nfs4_client *);
744 extern void nfsd4_shutdown_copy(struct nfs4_cl 702 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
745 extern struct nfs4_client_reclaim *nfs4_client 703 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
746 struct xdr_net 704 struct xdr_netobj princhash, struct nfsd_net *nn);
747 extern bool nfs4_has_reclaimed_state(struct xd 705 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
748 706
749 void put_nfs4_file(struct nfs4_file *fi); 707 void put_nfs4_file(struct nfs4_file *fi);
>> 708 extern struct nfsd4_copy *
>> 709 find_async_copy(struct nfs4_client *clp, stateid_t *staetid);
750 extern void nfs4_put_cpntf_state(struct nfsd_n 710 extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
751 struct nfs4_c 711 struct nfs4_cpntf_state *cps);
752 extern __be32 manage_cpntf_state(struct nfsd_n 712 extern __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
753 struct nfs4_c 713 struct nfs4_client *clp,
754 struct nfs4_c 714 struct nfs4_cpntf_state **cps);
755 static inline void get_nfs4_file(struct nfs4_f 715 static inline void get_nfs4_file(struct nfs4_file *fi)
756 { 716 {
757 refcount_inc(&fi->fi_ref); 717 refcount_inc(&fi->fi_ref);
758 } 718 }
759 struct nfsd_file *find_any_file(struct nfs4_fi 719 struct nfsd_file *find_any_file(struct nfs4_file *f);
760 720
761 #ifdef CONFIG_NFSD_V4 <<
762 void nfsd4_revoke_states(struct net *net, stru <<
763 #else <<
764 static inline void nfsd4_revoke_states(struct <<
765 { <<
766 } <<
767 #endif <<
768 <<
769 /* grace period management */ 721 /* grace period management */
770 void nfsd4_end_grace(struct nfsd_net *nn); 722 void nfsd4_end_grace(struct nfsd_net *nn);
771 723
772 /* nfs4recover operations */ 724 /* nfs4recover operations */
773 extern int nfsd4_client_tracking_init(struct n 725 extern int nfsd4_client_tracking_init(struct net *net);
774 extern void nfsd4_client_tracking_exit(struct 726 extern void nfsd4_client_tracking_exit(struct net *net);
775 extern void nfsd4_client_record_create(struct 727 extern void nfsd4_client_record_create(struct nfs4_client *clp);
776 extern void nfsd4_client_record_remove(struct 728 extern void nfsd4_client_record_remove(struct nfs4_client *clp);
777 extern int nfsd4_client_record_check(struct nf 729 extern int nfsd4_client_record_check(struct nfs4_client *clp);
778 extern void nfsd4_record_grace_done(struct nfs 730 extern void nfsd4_record_grace_done(struct nfsd_net *nn);
779 731
780 static inline bool try_to_expire_client(struct 732 static inline bool try_to_expire_client(struct nfs4_client *clp)
781 { 733 {
782 cmpxchg(&clp->cl_state, NFSD4_COURTESY 734 cmpxchg(&clp->cl_state, NFSD4_COURTESY, NFSD4_EXPIRABLE);
783 return clp->cl_state == NFSD4_EXPIRABL 735 return clp->cl_state == NFSD4_EXPIRABLE;
784 } 736 }
785 <<
786 extern __be32 nfsd4_deleg_getattr_conflict(str <<
787 struct dentry *dentry, bool *f <<
788 #endif /* NFSD4_STATE_H */ 737 #endif /* NFSD4_STATE_H */
789 738
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