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 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 sc_type;
64 refcount_t cs_count; !! 64 refcount_t sc_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; <<
191 <<
192 /* for CB_GETATTR */ <<
193 struct nfs4_cb_fattr dl_cb_fattr; <<
194 }; 152 };
195 153
196 #define cb_to_delegation(cb) \ 154 #define cb_to_delegation(cb) \
197 container_of(cb, struct nfs4_delegatio 155 container_of(cb, struct nfs4_delegation, dl_recall)
198 156
199 /* client delegation callback info */ 157 /* client delegation callback info */
200 struct nfs4_cb_conn { 158 struct nfs4_cb_conn {
201 /* SETCLIENTID info */ 159 /* SETCLIENTID info */
202 struct sockaddr_storage cb_addr; 160 struct sockaddr_storage cb_addr;
203 struct sockaddr_storage cb_saddr; 161 struct sockaddr_storage cb_saddr;
204 size_t cb_addrlen; 162 size_t cb_addrlen;
205 u32 cb_prog; /* us 163 u32 cb_prog; /* used only in 4.0 case;
206 pe 164 per-session otherwise */
207 u32 cb_ident; 165 u32 cb_ident; /* minorversion 0 only */
208 struct svc_xprt *cb_xprt; 166 struct svc_xprt *cb_xprt; /* minorversion 1 only */
209 }; 167 };
210 168
211 static inline struct nfs4_delegation *delegsta 169 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
212 { 170 {
213 return container_of(s, struct nfs4_del 171 return container_of(s, struct nfs4_delegation, dl_stid);
214 } 172 }
215 173
216 /* Maximum number of slots per session. 160 is 174 /* Maximum number of slots per session. 160 is useful for long haul TCP */
217 #define NFSD_MAX_SLOTS_PER_SESSION 160 175 #define NFSD_MAX_SLOTS_PER_SESSION 160
>> 176 /* Maximum number of operations per session compound */
>> 177 #define NFSD_MAX_OPS_PER_COMPOUND 16
218 /* Maximum session per slot cache size */ 178 /* Maximum session per slot cache size */
219 #define NFSD_SLOT_CACHE_SIZE 2048 179 #define NFSD_SLOT_CACHE_SIZE 2048
220 /* Maximum number of NFSD_SLOT_CACHE_SIZE slot 180 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
221 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 181 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
222 #define NFSD_MAX_MEM_PER_SESSION \ 182 #define NFSD_MAX_MEM_PER_SESSION \
223 (NFSD_CACHE_SIZE_SLOTS_PER_SES 183 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
224 184
225 struct nfsd4_slot { 185 struct nfsd4_slot {
226 u32 sl_seqid; 186 u32 sl_seqid;
227 __be32 sl_status; 187 __be32 sl_status;
228 struct svc_cred sl_cred; 188 struct svc_cred sl_cred;
229 u32 sl_datalen; 189 u32 sl_datalen;
230 u16 sl_opcnt; 190 u16 sl_opcnt;
231 #define NFSD4_SLOT_INUSE (1 << 0) 191 #define NFSD4_SLOT_INUSE (1 << 0)
232 #define NFSD4_SLOT_CACHETHIS (1 << 1) 192 #define NFSD4_SLOT_CACHETHIS (1 << 1)
233 #define NFSD4_SLOT_INITIALIZED (1 << 2) 193 #define NFSD4_SLOT_INITIALIZED (1 << 2)
234 #define NFSD4_SLOT_CACHED (1 << 3) 194 #define NFSD4_SLOT_CACHED (1 << 3)
235 u8 sl_flags; 195 u8 sl_flags;
236 char sl_data[]; 196 char sl_data[];
237 }; 197 };
238 198
239 struct nfsd4_channel_attrs { 199 struct nfsd4_channel_attrs {
240 u32 headerpadsz; 200 u32 headerpadsz;
241 u32 maxreq_sz; 201 u32 maxreq_sz;
242 u32 maxresp_sz; 202 u32 maxresp_sz;
243 u32 maxresp_cached; 203 u32 maxresp_cached;
244 u32 maxops; 204 u32 maxops;
245 u32 maxreqs; 205 u32 maxreqs;
246 u32 nr_rdma_attrs; 206 u32 nr_rdma_attrs;
247 u32 rdma_attrs; 207 u32 rdma_attrs;
248 }; 208 };
249 209
250 struct nfsd4_cb_sec { 210 struct nfsd4_cb_sec {
251 u32 flavor; /* (u32)(-1) used to m 211 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
252 kuid_t uid; 212 kuid_t uid;
253 kgid_t gid; 213 kgid_t gid;
254 }; 214 };
255 215
256 struct nfsd4_create_session { 216 struct nfsd4_create_session {
257 clientid_t client 217 clientid_t clientid;
258 struct nfs4_sessionid sessio 218 struct nfs4_sessionid sessionid;
259 u32 seqid; 219 u32 seqid;
260 u32 flags; 220 u32 flags;
261 struct nfsd4_channel_attrs fore_c 221 struct nfsd4_channel_attrs fore_channel;
262 struct nfsd4_channel_attrs back_c 222 struct nfsd4_channel_attrs back_channel;
263 u32 callba 223 u32 callback_prog;
264 struct nfsd4_cb_sec cb_sec 224 struct nfsd4_cb_sec cb_sec;
265 }; 225 };
266 226
267 struct nfsd4_backchannel_ctl { 227 struct nfsd4_backchannel_ctl {
268 u32 bc_cb_program; 228 u32 bc_cb_program;
269 struct nfsd4_cb_sec bc_cb_ 229 struct nfsd4_cb_sec bc_cb_sec;
270 }; 230 };
271 231
272 struct nfsd4_bind_conn_to_session { 232 struct nfsd4_bind_conn_to_session {
273 struct nfs4_sessionid sessio 233 struct nfs4_sessionid sessionid;
274 u32 dir; 234 u32 dir;
275 }; 235 };
276 236
277 /* The single slot clientid cache structure */ 237 /* The single slot clientid cache structure */
278 struct nfsd4_clid_slot { 238 struct nfsd4_clid_slot {
279 u32 sl_seq 239 u32 sl_seqid;
280 __be32 sl_sta 240 __be32 sl_status;
281 struct nfsd4_create_session sl_cr_ 241 struct nfsd4_create_session sl_cr_ses;
282 }; 242 };
283 243
284 struct nfsd4_conn { 244 struct nfsd4_conn {
285 struct list_head cn_persession; 245 struct list_head cn_persession;
286 struct svc_xprt *cn_xprt; 246 struct svc_xprt *cn_xprt;
287 struct svc_xpt_user cn_xpt_user; 247 struct svc_xpt_user cn_xpt_user;
288 struct nfsd4_session *cn_session; 248 struct nfsd4_session *cn_session;
289 /* CDFC4_FORE, CDFC4_BACK: */ 249 /* CDFC4_FORE, CDFC4_BACK: */
290 unsigned char cn_flags; 250 unsigned char cn_flags;
291 }; 251 };
292 252
293 /* 253 /*
294 * Representation of a v4.1+ session. These ar 254 * Representation of a v4.1+ session. These are refcounted in a similar fashion
295 * to the nfs4_client. References are only tak 255 * to the nfs4_client. References are only taken when the server is actively
296 * working on the object (primarily during the 256 * working on the object (primarily during the processing of compounds).
297 */ 257 */
298 struct nfsd4_session { 258 struct nfsd4_session {
299 atomic_t se_ref; 259 atomic_t se_ref;
300 struct list_head se_hash; 260 struct list_head se_hash; /* hash by sessionid */
301 struct list_head se_perclnt; 261 struct list_head se_perclnt;
302 /* See SESSION4_PERSIST, etc. for standard fla 262 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
303 #define NFS4_SESSION_DEAD 0x010 263 #define NFS4_SESSION_DEAD 0x010
304 u32 se_flags; 264 u32 se_flags;
305 struct nfs4_client *se_client; 265 struct nfs4_client *se_client;
306 struct nfs4_sessionid se_sessionid; 266 struct nfs4_sessionid se_sessionid;
307 struct nfsd4_channel_attrs se_fchannel 267 struct nfsd4_channel_attrs se_fchannel;
308 struct nfsd4_channel_attrs se_bchannel 268 struct nfsd4_channel_attrs se_bchannel;
309 struct nfsd4_cb_sec se_cb_sec; 269 struct nfsd4_cb_sec se_cb_sec;
310 struct list_head se_conns; 270 struct list_head se_conns;
311 u32 se_cb_prog; 271 u32 se_cb_prog;
312 u32 se_cb_seq_nr; 272 u32 se_cb_seq_nr;
313 struct nfsd4_slot *se_slots[]; 273 struct nfsd4_slot *se_slots[]; /* forward channel slots */
314 }; 274 };
315 275
316 /* formatted contents of nfs4_sessionid */ 276 /* formatted contents of nfs4_sessionid */
317 struct nfsd4_sessionid { 277 struct nfsd4_sessionid {
318 clientid_t clientid; 278 clientid_t clientid;
319 u32 sequence; 279 u32 sequence;
320 u32 reserved; 280 u32 reserved;
321 }; 281 };
322 282
323 #define HEXDIR_LEN 33 /* hex version of 16 283 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
324 284
325 /* 285 /*
326 * State Meaning <<
327 * ------------------------------------------- <<
328 * | NFSD4_ACTIVE | Confirmed, active <<
329 * |------------------- ---------------------- <<
330 * | NFSD4_COURTESY | Courtesy state. <<
331 * | | Lease/lock/share <<
332 * | | reservation conflict <<
333 * | | can cause Courtesy <<
334 * | | client to be expired <<
335 * |------------------------------------------ <<
336 * | NFSD4_EXPIRABLE | Courtesy client to be <<
337 * | | expired by Laundromat <<
338 * | | due to conflict <<
339 * |------------------------------------------ <<
340 */ <<
341 enum { <<
342 NFSD4_ACTIVE = 0, <<
343 NFSD4_COURTESY, <<
344 NFSD4_EXPIRABLE, <<
345 }; <<
346 <<
347 /* <<
348 * struct nfs4_client - one per client. Clien 286 * struct nfs4_client - one per client. Clientids live here.
349 * 287 *
350 * The initial object created by an NFS client 288 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
351 * or EXCHANGE_ID (for NFSv4.1+). These object 289 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
352 * Each nfsd_net_ns object contains a set of t 290 * Each nfsd_net_ns object contains a set of these and they are tracked via
353 * short and long form clientid. They are hash 291 * short and long form clientid. They are hashed and searched for under the
354 * per-nfsd_net client_lock spinlock. 292 * per-nfsd_net client_lock spinlock.
355 * 293 *
356 * References to it are only held during the p 294 * References to it are only held during the processing of compounds, and in
357 * certain other operations. In their "resting 295 * certain other operations. In their "resting state" they have a refcount of
358 * 0. If they are not renewed within a lease p 296 * 0. If they are not renewed within a lease period, they become eligible for
359 * destruction by the laundromat. 297 * destruction by the laundromat.
360 * 298 *
361 * These objects can also be destroyed if the !! 299 * These objects can also be destroyed prematurely by the fault injection code,
362 * SETCLIENTID or EXCHANGE_ID operations. !! 300 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates.
363 * <<
364 * Care is taken *not* to do this however when 301 * Care is taken *not* to do this however when the objects have an elevated
365 * refcount. 302 * refcount.
366 * 303 *
367 * o Each nfs4_client is hashed by clientid 304 * o Each nfs4_client is hashed by clientid
368 * 305 *
369 * o Each nfs4_clients is also hashed by name 306 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
370 * sent by the client to identify itself). 307 * sent by the client to identify itself).
371 * !! 308 *
372 * o cl_perclient list is used to ensure no da 309 * o cl_perclient list is used to ensure no dangling stateowner references
373 * when we expire the nfs4_client 310 * when we expire the nfs4_client
374 */ 311 */
375 struct nfs4_client { 312 struct nfs4_client {
376 struct list_head cl_idhash; 313 struct list_head cl_idhash; /* hash by cl_clientid.id */
377 struct rb_node cl_namenode; 314 struct rb_node cl_namenode; /* link into by-name trees */
378 struct list_head *cl_ownerstr_h 315 struct list_head *cl_ownerstr_hashtbl;
379 struct list_head cl_openowners; 316 struct list_head cl_openowners;
380 struct idr cl_stateids; 317 struct idr cl_stateids; /* stateid lookup */
381 struct list_head cl_delegations 318 struct list_head cl_delegations;
382 struct list_head cl_revoked; 319 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
383 struct list_head cl_lru; 320 struct list_head cl_lru; /* tail queue */
384 #ifdef CONFIG_NFSD_PNFS 321 #ifdef CONFIG_NFSD_PNFS
385 struct list_head cl_lo_states; 322 struct list_head cl_lo_states; /* outstanding layout states */
386 #endif 323 #endif
387 struct xdr_netobj cl_name; 324 struct xdr_netobj cl_name; /* id generated by client */
388 nfs4_verifier cl_verifier; 325 nfs4_verifier cl_verifier; /* generated by client */
389 time64_t cl_time; 326 time64_t cl_time; /* time of last lease renewal */
390 struct sockaddr_storage cl_addr; 327 struct sockaddr_storage cl_addr; /* client ipaddress */
391 bool cl_mach_cred; 328 bool cl_mach_cred; /* SP4_MACH_CRED in force */
392 struct svc_cred cl_cred; 329 struct svc_cred cl_cred; /* setclientid principal */
393 clientid_t cl_clientid; 330 clientid_t cl_clientid; /* generated by server */
394 nfs4_verifier cl_confirm; 331 nfs4_verifier cl_confirm; /* generated by server */
395 u32 cl_minorversio 332 u32 cl_minorversion;
396 atomic_t cl_admin_revok <<
397 /* NFSv4.1 client implementation id: * 333 /* NFSv4.1 client implementation id: */
398 struct xdr_netobj cl_nii_domain; 334 struct xdr_netobj cl_nii_domain;
399 struct xdr_netobj cl_nii_name; 335 struct xdr_netobj cl_nii_name;
400 struct timespec64 cl_nii_time; 336 struct timespec64 cl_nii_time;
401 337
402 /* for v4.0 and v4.1 callbacks: */ 338 /* for v4.0 and v4.1 callbacks: */
403 struct nfs4_cb_conn cl_cb_conn; 339 struct nfs4_cb_conn cl_cb_conn;
404 #define NFSD4_CLIENT_CB_UPDATE (0) 340 #define NFSD4_CLIENT_CB_UPDATE (0)
405 #define NFSD4_CLIENT_CB_KILL (1) 341 #define NFSD4_CLIENT_CB_KILL (1)
406 #define NFSD4_CLIENT_STABLE (2) 342 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
407 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) 343 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
408 #define NFSD4_CLIENT_CONFIRMED (4) 344 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
409 #define NFSD4_CLIENT_UPCALL_LOCK (5) 345 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
410 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << 346 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
411 1 << 347 1 << NFSD4_CLIENT_CB_KILL)
412 #define NFSD4_CLIENT_CB_RECALL_ANY (6) <<
413 unsigned long cl_flags; 348 unsigned long cl_flags;
414 <<
415 struct workqueue_struct *cl_callback_w <<
416 const struct cred *cl_cb_cred; 349 const struct cred *cl_cb_cred;
417 struct rpc_clnt *cl_cb_client; 350 struct rpc_clnt *cl_cb_client;
418 u32 cl_cb_ident; 351 u32 cl_cb_ident;
419 #define NFSD4_CB_UP 0 352 #define NFSD4_CB_UP 0
420 #define NFSD4_CB_UNKNOWN 1 353 #define NFSD4_CB_UNKNOWN 1
421 #define NFSD4_CB_DOWN 2 354 #define NFSD4_CB_DOWN 2
422 #define NFSD4_CB_FAULT 3 355 #define NFSD4_CB_FAULT 3
423 int cl_cb_state; 356 int cl_cb_state;
424 struct nfsd4_callback cl_cb_null; 357 struct nfsd4_callback cl_cb_null;
425 struct nfsd4_session *cl_cb_session 358 struct nfsd4_session *cl_cb_session;
426 359
427 /* for all client information that cal 360 /* for all client information that callback code might need: */
428 spinlock_t cl_lock; 361 spinlock_t cl_lock;
429 362
430 /* for nfs41 */ 363 /* for nfs41 */
431 struct list_head cl_sessions; 364 struct list_head cl_sessions;
432 struct nfsd4_clid_slot cl_cs_slot; 365 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
433 u32 cl_exchange_fl 366 u32 cl_exchange_flags;
434 /* number of rpc's in progress over an 367 /* number of rpc's in progress over an associated session: */
435 atomic_t cl_rpc_users; 368 atomic_t cl_rpc_users;
436 struct nfsdfs_client cl_nfsdfs; 369 struct nfsdfs_client cl_nfsdfs;
437 struct nfs4_op_map cl_spo_must_al 370 struct nfs4_op_map cl_spo_must_allow;
438 371
439 /* debugging info directory under nfsd 372 /* debugging info directory under nfsd/clients/ : */
440 struct dentry *cl_nfsd_dentr 373 struct dentry *cl_nfsd_dentry;
441 /* 'info' file within that directory. 374 /* 'info' file within that directory. Ref is not counted,
442 * but will remain valid iff cl_nfsd_d 375 * but will remain valid iff cl_nfsd_dentry != NULL
443 */ 376 */
444 struct dentry *cl_nfsd_info_ 377 struct dentry *cl_nfsd_info_dentry;
445 378
446 /* for nfs41 callbacks */ 379 /* for nfs41 callbacks */
447 /* We currently support a single back 380 /* We currently support a single back channel with a single slot */
448 unsigned long cl_cb_slot_bus 381 unsigned long cl_cb_slot_busy;
449 struct rpc_wait_queue cl_cb_waitq; 382 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
450 383 /* wait here for slots */
451 struct net *net; 384 struct net *net;
452 struct list_head async_copies; 385 struct list_head async_copies; /* list of async copies */
453 spinlock_t async_lock; 386 spinlock_t async_lock; /* lock for async copies */
454 atomic_t cl_cb_inflight 387 atomic_t cl_cb_inflight; /* Outstanding callbacks */
455 <<
456 unsigned int cl_state; <<
457 atomic_t cl_delegs_in_r <<
458 <<
459 struct nfsd4_cb_recall_any *cl_ra <<
460 time64_t cl_ra_time; <<
461 struct list_head cl_ra_cblist; <<
462 }; 388 };
463 389
464 /* struct nfs4_client_reset 390 /* struct nfs4_client_reset
465 * one per old client. Populates reset_str_has 391 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
466 * upon lease reset, or from upcall to state_d 392 * upon lease reset, or from upcall to state_daemon (to read in state
467 * from non-volitile storage) upon reboot. 393 * from non-volitile storage) upon reboot.
468 */ 394 */
469 struct nfs4_client_reclaim { 395 struct nfs4_client_reclaim {
470 struct list_head cr_strhash; 396 struct list_head cr_strhash; /* hash by cr_name */
471 struct nfs4_client *cr_clp; 397 struct nfs4_client *cr_clp; /* pointer to associated clp */
472 struct xdr_netobj cr_name; 398 struct xdr_netobj cr_name; /* recovery dir name */
473 struct xdr_netobj cr_princhash; 399 struct xdr_netobj cr_princhash;
474 }; 400 };
475 401
476 /* A reasonable value for REPLAY_ISIZE was est 402 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
477 * The OPEN response, typically the largest, r 403 * The OPEN response, typically the largest, requires
478 * 4(status) + 8(stateid) + 20(changeinfo) + 404 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
479 * 4(deleg. type) + 8(deleg. stateid) + 4(de 405 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
480 * 20(deleg. space limit) + ~32(deleg. ace) 406 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
481 */ 407 */
482 408
483 #define NFSD4_REPLAY_ISIZE 112 409 #define NFSD4_REPLAY_ISIZE 112
484 410
485 /* 411 /*
486 * Replay buffer, where the result of the last 412 * Replay buffer, where the result of the last seqid-mutating operation
487 * is cached. 413 * is cached.
488 */ 414 */
489 struct nfs4_replay { 415 struct nfs4_replay {
490 __be32 rp_status; 416 __be32 rp_status;
491 unsigned int rp_buflen; 417 unsigned int rp_buflen;
492 char *rp_buf; 418 char *rp_buf;
493 struct knfsd_fh rp_openfh; 419 struct knfsd_fh rp_openfh;
494 atomic_t rp_locked; !! 420 struct mutex rp_mutex;
495 char rp_ibuf[NFSD4_ 421 char rp_ibuf[NFSD4_REPLAY_ISIZE];
496 }; 422 };
497 423
498 struct nfs4_stateowner; 424 struct nfs4_stateowner;
499 425
500 struct nfs4_stateowner_operations { 426 struct nfs4_stateowner_operations {
501 void (*so_unhash)(struct nfs4_stateown 427 void (*so_unhash)(struct nfs4_stateowner *);
502 void (*so_free)(struct nfs4_stateowner 428 void (*so_free)(struct nfs4_stateowner *);
503 }; 429 };
504 430
505 /* 431 /*
506 * A core object that represents either an ope 432 * A core object that represents either an open or lock owner. The object and
507 * lock owner objects have one of these embedd 433 * lock owner objects have one of these embedded within them. Refcounts and
508 * other fields common to both owner types are 434 * other fields common to both owner types are contained within these
509 * structures. 435 * structures.
510 */ 436 */
511 struct nfs4_stateowner { 437 struct nfs4_stateowner {
512 struct list_head 438 struct list_head so_strhash;
513 struct list_head 439 struct list_head so_stateids;
514 struct nfs4_client 440 struct nfs4_client *so_client;
515 const struct nfs4_stateowner_operation 441 const struct nfs4_stateowner_operations *so_ops;
516 /* after increment in nfsd4_bump_seqid 442 /* after increment in nfsd4_bump_seqid, represents the next
517 * sequence id expected from the clien 443 * sequence id expected from the client: */
518 atomic_t 444 atomic_t so_count;
519 u32 445 u32 so_seqid;
520 struct xdr_netobj 446 struct xdr_netobj so_owner; /* open owner name */
521 struct nfs4_replay 447 struct nfs4_replay so_replay;
522 bool 448 bool so_is_open_owner;
523 }; 449 };
524 450
525 /* 451 /*
526 * When a file is opened, the client provides 452 * When a file is opened, the client provides an open state owner opaque string
527 * that indicates the "owner" of that open. Th 453 * that indicates the "owner" of that open. These objects are refcounted.
528 * References to it are held by each open stat 454 * References to it are held by each open state associated with it. This object
529 * is a superset of the nfs4_stateowner struct 455 * is a superset of the nfs4_stateowner struct.
530 */ 456 */
531 struct nfs4_openowner { 457 struct nfs4_openowner {
532 struct nfs4_stateowner oo_owner; /* m 458 struct nfs4_stateowner oo_owner; /* must be first field */
533 struct list_head oo_perclient; 459 struct list_head oo_perclient;
534 /* 460 /*
535 * We keep around openowners a little 461 * We keep around openowners a little while after last close,
536 * which saves clients from having to 462 * which saves clients from having to confirm, and allows us to
537 * handle close replays if they come s 463 * handle close replays if they come soon enough. The close_lru
538 * is a list of such openowners, to be 464 * is a list of such openowners, to be reaped by the laundromat
539 * thread eventually if they remain un 465 * thread eventually if they remain unused:
540 */ 466 */
541 struct list_head oo_close_lru; 467 struct list_head oo_close_lru;
542 struct nfs4_ol_stateid *oo_last_closed 468 struct nfs4_ol_stateid *oo_last_closed_stid;
543 time64_t oo_time; /* ti 469 time64_t oo_time; /* time of placement on so_close_lru */
544 #define NFS4_OO_CONFIRMED 1 470 #define NFS4_OO_CONFIRMED 1
545 unsigned char oo_flags; 471 unsigned char oo_flags;
546 }; 472 };
547 473
548 /* 474 /*
549 * Represents a generic "lockowner". Similar t 475 * Represents a generic "lockowner". Similar to an openowner. References to it
550 * are held by the lock stateids that are crea 476 * are held by the lock stateids that are created on its behalf. This object is
551 * a superset of the nfs4_stateowner struct. 477 * a superset of the nfs4_stateowner struct.
552 */ 478 */
553 struct nfs4_lockowner { 479 struct nfs4_lockowner {
554 struct nfs4_stateowner lo_owner; 480 struct nfs4_stateowner lo_owner; /* must be first element */
555 struct list_head lo_blocked; 481 struct list_head lo_blocked; /* blocked file_locks */
556 }; 482 };
557 483
558 static inline struct nfs4_openowner * openowne 484 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
559 { 485 {
560 return container_of(so, struct nfs4_op 486 return container_of(so, struct nfs4_openowner, oo_owner);
561 } 487 }
562 488
563 static inline struct nfs4_lockowner * lockowne 489 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
564 { 490 {
565 return container_of(so, struct nfs4_lo 491 return container_of(so, struct nfs4_lockowner, lo_owner);
566 } 492 }
567 493
568 /* 494 /*
569 * Per-client state indicating no. of opens an 495 * Per-client state indicating no. of opens and outstanding delegations
570 * on a file from a particular client.'od' sta 496 * on a file from a particular client.'od' stands for 'open & delegation'
571 */ 497 */
572 struct nfs4_clnt_odstate { 498 struct nfs4_clnt_odstate {
573 struct nfs4_client *co_client; 499 struct nfs4_client *co_client;
574 struct nfs4_file *co_file; 500 struct nfs4_file *co_file;
575 struct list_head co_perfile; 501 struct list_head co_perfile;
576 refcount_t co_odcount; 502 refcount_t co_odcount;
577 }; 503 };
578 504
579 /* 505 /*
580 * nfs4_file: a file opened by some number of 506 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
581 * 507 *
582 * These objects are global. nfsd keeps one in 508 * These objects are global. nfsd keeps one instance of a nfs4_file per
583 * filehandle (though it may keep multiple fil 509 * filehandle (though it may keep multiple file descriptors for each). Each
584 * inode can have multiple filehandles associa 510 * inode can have multiple filehandles associated with it, so there is
585 * (potentially) a many to one relationship be 511 * (potentially) a many to one relationship between this struct and struct
586 * inode. 512 * inode.
>> 513 *
>> 514 * These are hashed by filehandle in the file_hashtbl, which is protected by
>> 515 * the global state_lock spinlock.
587 */ 516 */
588 struct nfs4_file { 517 struct nfs4_file {
589 refcount_t fi_ref; 518 refcount_t fi_ref;
590 struct inode * fi_inode; 519 struct inode * fi_inode;
591 bool fi_aliased; 520 bool fi_aliased;
592 spinlock_t fi_lock; 521 spinlock_t fi_lock;
593 struct rhlist_head fi_rlist; !! 522 struct hlist_node fi_hash; /* hash on fi_fhandle */
594 struct list_head fi_stateids; 523 struct list_head fi_stateids;
595 union { 524 union {
596 struct list_head fi_del 525 struct list_head fi_delegations;
597 struct rcu_head fi_rcu 526 struct rcu_head fi_rcu;
598 }; 527 };
599 struct list_head fi_clnt_odstat 528 struct list_head fi_clnt_odstate;
600 /* One each for O_RDONLY, O_WRONLY, O_ 529 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
601 struct nfsd_file *fi_fds[3]; 530 struct nfsd_file *fi_fds[3];
602 /* 531 /*
603 * Each open or lock stateid contribut 532 * Each open or lock stateid contributes 0-4 to the counts
604 * below depending on which bits are s 533 * below depending on which bits are set in st_access_bitmap:
605 * 1 to fi_access[O_RDONLY] if NFS 534 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
606 * + 1 to fi_access[O_WRONLY] if NFS 535 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
607 * + 1 to both of the above if NFS4_ 536 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
608 */ 537 */
609 atomic_t fi_access[2]; 538 atomic_t fi_access[2];
610 u32 fi_share_deny; 539 u32 fi_share_deny;
611 struct nfsd_file *fi_deleg_file 540 struct nfsd_file *fi_deleg_file;
612 int fi_delegees; 541 int fi_delegees;
613 struct knfsd_fh fi_fhandle; 542 struct knfsd_fh fi_fhandle;
614 bool fi_had_conflic 543 bool fi_had_conflict;
615 #ifdef CONFIG_NFSD_PNFS 544 #ifdef CONFIG_NFSD_PNFS
616 struct list_head fi_lo_states; 545 struct list_head fi_lo_states;
617 atomic_t fi_lo_recalls; 546 atomic_t fi_lo_recalls;
618 #endif 547 #endif
619 }; 548 };
620 549
621 /* 550 /*
622 * A generic struct representing either a open 551 * A generic struct representing either a open or lock stateid. The nfs4_client
623 * holds a reference to each of these objects, 552 * holds a reference to each of these objects, and they in turn hold a
624 * reference to their respective stateowners. 553 * reference to their respective stateowners. The client's reference is
625 * released in response to a close or unlock ( 554 * 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 555 * or lock stateid) or when the client is being destroyed.
627 * 556 *
628 * In the case of v4.0 open stateids, these ob 557 * In the case of v4.0 open stateids, these objects are preserved for a little
629 * while after close in order to handle CLOSE 558 * while after close in order to handle CLOSE replays. Those are eventually
630 * reclaimed via a LRU scheme by the laundroma 559 * reclaimed via a LRU scheme by the laundromat.
631 * 560 *
632 * This object is a superset of the nfs4_stid. 561 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
633 * Better suggestions welcome. 562 * Better suggestions welcome.
634 */ 563 */
635 struct nfs4_ol_stateid { 564 struct nfs4_ol_stateid {
636 struct nfs4_stid st_sti 565 struct nfs4_stid st_stid;
637 struct list_head st_per 566 struct list_head st_perfile;
638 struct list_head st_per 567 struct list_head st_perstateowner;
639 struct list_head st_loc 568 struct list_head st_locks;
640 struct nfs4_stateowner *st_st 569 struct nfs4_stateowner *st_stateowner;
641 struct nfs4_clnt_odstate *st_cl 570 struct nfs4_clnt_odstate *st_clnt_odstate;
642 /* <<
643 * These bitmasks use 3 separate bits for READ <<
644 * comment above bmap_to_share_mode() for expl <<
645 */ <<
646 unsigned char st_acc 571 unsigned char st_access_bmap;
647 unsigned char st_den 572 unsigned char st_deny_bmap;
648 struct nfs4_ol_stateid *st_op 573 struct nfs4_ol_stateid *st_openstp;
649 struct mutex st_mut 574 struct mutex st_mutex;
650 }; 575 };
651 576
652 static inline struct nfs4_ol_stateid *openlock 577 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
653 { 578 {
654 return container_of(s, struct nfs4_ol_ 579 return container_of(s, struct nfs4_ol_stateid, st_stid);
655 } 580 }
656 581
657 struct nfs4_layout_stateid { 582 struct nfs4_layout_stateid {
658 struct nfs4_stid ls_sti 583 struct nfs4_stid ls_stid;
659 struct list_head ls_per 584 struct list_head ls_perclnt;
660 struct list_head ls_per 585 struct list_head ls_perfile;
661 spinlock_t ls_loc 586 spinlock_t ls_lock;
662 struct list_head ls_lay 587 struct list_head ls_layouts;
663 u32 ls_lay 588 u32 ls_layout_type;
664 struct nfsd_file *ls_fi 589 struct nfsd_file *ls_file;
665 struct nfsd4_callback ls_rec 590 struct nfsd4_callback ls_recall;
666 stateid_t ls_rec 591 stateid_t ls_recall_sid;
667 bool ls_rec 592 bool ls_recalled;
668 struct mutex ls_mut 593 struct mutex ls_mutex;
669 }; 594 };
670 595
671 static inline struct nfs4_layout_stateid *layo 596 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
672 { 597 {
673 return container_of(s, struct nfs4_lay 598 return container_of(s, struct nfs4_layout_stateid, ls_stid);
674 } 599 }
675 600
676 /* flags for preprocess_seqid_op() */ 601 /* flags for preprocess_seqid_op() */
677 #define RD_STATE 0x00000010 602 #define RD_STATE 0x00000010
678 #define WR_STATE 0x00000020 603 #define WR_STATE 0x00000020
679 604
680 enum nfsd4_cb_op { 605 enum nfsd4_cb_op {
681 NFSPROC4_CLNT_CB_NULL = 0, 606 NFSPROC4_CLNT_CB_NULL = 0,
682 NFSPROC4_CLNT_CB_RECALL, 607 NFSPROC4_CLNT_CB_RECALL,
683 NFSPROC4_CLNT_CB_LAYOUT, 608 NFSPROC4_CLNT_CB_LAYOUT,
684 NFSPROC4_CLNT_CB_OFFLOAD, 609 NFSPROC4_CLNT_CB_OFFLOAD,
685 NFSPROC4_CLNT_CB_SEQUENCE, 610 NFSPROC4_CLNT_CB_SEQUENCE,
686 NFSPROC4_CLNT_CB_NOTIFY_LOCK, 611 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
687 NFSPROC4_CLNT_CB_RECALL_ANY, <<
688 NFSPROC4_CLNT_CB_GETATTR, <<
689 }; 612 };
690 613
691 /* Returns true iff a is later than b: */ 614 /* Returns true iff a is later than b: */
692 static inline bool nfsd4_stateid_generation_af 615 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
693 { 616 {
694 return (s32)(a->si_generation - b->si_ 617 return (s32)(a->si_generation - b->si_generation) > 0;
695 } 618 }
696 619
697 /* 620 /*
698 * When a client tries to get a lock on a file 621 * 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 622 * on the blocking lock. When the lock becomes free, we can then issue a
700 * CB_NOTIFY_LOCK to the server. 623 * CB_NOTIFY_LOCK to the server.
701 */ 624 */
702 struct nfsd4_blocked_lock { 625 struct nfsd4_blocked_lock {
703 struct list_head nbl_list; 626 struct list_head nbl_list;
704 struct list_head nbl_lru; 627 struct list_head nbl_lru;
705 time64_t nbl_time; 628 time64_t nbl_time;
706 struct file_lock nbl_lock; 629 struct file_lock nbl_lock;
707 struct knfsd_fh nbl_fh; 630 struct knfsd_fh nbl_fh;
708 struct nfsd4_callback nbl_cb; 631 struct nfsd4_callback nbl_cb;
709 struct kref nbl_kref; <<
710 }; 632 };
711 633
712 struct nfsd4_compound_state; 634 struct nfsd4_compound_state;
713 struct nfsd_net; 635 struct nfsd_net;
714 struct nfsd4_copy; 636 struct nfsd4_copy;
715 637
716 extern __be32 nfs4_preprocess_stateid_op(struc 638 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
717 struct nfsd4_compound_state *c 639 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
718 stateid_t *stateid, int flags, 640 stateid_t *stateid, int flags, struct nfsd_file **filp,
719 struct nfs4_stid **cstid); 641 struct nfs4_stid **cstid);
720 __be32 nfsd4_lookup_stateid(struct nfsd4_compo 642 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
721 stateid_t *stateid !! 643 stateid_t *stateid, unsigned char typemask,
722 unsigned short sta !! 644 struct nfs4_stid **s, struct nfsd_net *nn);
723 struct nfs4_stid * <<
724 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_ 645 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
725 void (*sc_fr 646 void (*sc_free)(struct nfs4_stid *));
726 int nfs4_init_copy_state(struct nfsd_net *nn, 647 int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
727 void nfs4_free_copy_state(struct nfsd4_copy *c 648 void nfs4_free_copy_state(struct nfsd4_copy *copy);
728 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf 649 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
729 struct nfs4_stid *p_st 650 struct nfs4_stid *p_stid);
>> 651 void nfs4_unhash_stid(struct nfs4_stid *s);
730 void nfs4_put_stid(struct nfs4_stid *s); 652 void nfs4_put_stid(struct nfs4_stid *s);
731 void nfs4_inc_and_copy_stateid(stateid_t *dst, 653 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
732 void nfs4_remove_reclaim_record(struct nfs4_cl 654 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
733 extern void nfs4_release_reclaim(struct nfsd_n 655 extern void nfs4_release_reclaim(struct nfsd_net *);
734 extern struct nfs4_client_reclaim *nfsd4_find_ 656 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
735 657 struct nfsd_net *nn);
736 extern __be32 nfs4_check_open_reclaim(struct n 658 extern __be32 nfs4_check_open_reclaim(struct nfs4_client *);
737 extern void nfsd4_probe_callback(struct nfs4_c 659 extern void nfsd4_probe_callback(struct nfs4_client *clp);
738 extern void nfsd4_probe_callback_sync(struct n 660 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
739 extern void nfsd4_change_callback(struct nfs4_ 661 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
740 extern void nfsd4_init_cb(struct nfsd4_callbac 662 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
741 const struct nfsd4_callback_op 663 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
742 extern bool nfsd4_run_cb(struct nfsd4_callback !! 664 extern void nfsd4_run_cb(struct nfsd4_callback *cb);
>> 665 extern int nfsd4_create_callback_queue(void);
>> 666 extern void nfsd4_destroy_callback_queue(void);
743 extern void nfsd4_shutdown_callback(struct nfs 667 extern void nfsd4_shutdown_callback(struct nfs4_client *);
744 extern void nfsd4_shutdown_copy(struct nfs4_cl 668 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
>> 669 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
745 extern struct nfs4_client_reclaim *nfs4_client 670 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
746 struct xdr_net 671 struct xdr_netobj princhash, struct nfsd_net *nn);
747 extern bool nfs4_has_reclaimed_state(struct xd 672 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
748 673
749 void put_nfs4_file(struct nfs4_file *fi); 674 void put_nfs4_file(struct nfs4_file *fi);
>> 675 extern void nfs4_put_copy(struct nfsd4_copy *copy);
>> 676 extern struct nfsd4_copy *
>> 677 find_async_copy(struct nfs4_client *clp, stateid_t *staetid);
750 extern void nfs4_put_cpntf_state(struct nfsd_n 678 extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
751 struct nfs4_c 679 struct nfs4_cpntf_state *cps);
752 extern __be32 manage_cpntf_state(struct nfsd_n 680 extern __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
753 struct nfs4_c 681 struct nfs4_client *clp,
754 struct nfs4_c 682 struct nfs4_cpntf_state **cps);
755 static inline void get_nfs4_file(struct nfs4_f 683 static inline void get_nfs4_file(struct nfs4_file *fi)
756 { 684 {
757 refcount_inc(&fi->fi_ref); 685 refcount_inc(&fi->fi_ref);
758 } 686 }
759 struct nfsd_file *find_any_file(struct nfs4_fi 687 struct nfsd_file *find_any_file(struct nfs4_file *f);
760 688
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 */ 689 /* grace period management */
770 void nfsd4_end_grace(struct nfsd_net *nn); 690 void nfsd4_end_grace(struct nfsd_net *nn);
771 691
772 /* nfs4recover operations */ 692 /* nfs4recover operations */
773 extern int nfsd4_client_tracking_init(struct n 693 extern int nfsd4_client_tracking_init(struct net *net);
774 extern void nfsd4_client_tracking_exit(struct 694 extern void nfsd4_client_tracking_exit(struct net *net);
775 extern void nfsd4_client_record_create(struct 695 extern void nfsd4_client_record_create(struct nfs4_client *clp);
776 extern void nfsd4_client_record_remove(struct 696 extern void nfsd4_client_record_remove(struct nfs4_client *clp);
777 extern int nfsd4_client_record_check(struct nf 697 extern int nfsd4_client_record_check(struct nfs4_client *clp);
778 extern void nfsd4_record_grace_done(struct nfs 698 extern void nfsd4_record_grace_done(struct nfsd_net *nn);
779 699
780 static inline bool try_to_expire_client(struct <<
781 { <<
782 cmpxchg(&clp->cl_state, NFSD4_COURTESY <<
783 return clp->cl_state == NFSD4_EXPIRABL <<
784 } <<
785 <<
786 extern __be32 nfsd4_deleg_getattr_conflict(str <<
787 struct dentry *dentry, bool *f <<
788 #endif /* NFSD4_STATE_H */ 700 #endif /* NFSD4_STATE_H */
789 701
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