Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Kendrick Smith <kmsmith@umich.edu> |
| 6 | * Andy Adamson <kandros@umich.edu> |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | */ |
| 34 | |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 35 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/smp_lock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 38 | #include <linux/namei.h> |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 39 | #include <linux/swap.h> |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 40 | #include <linux/sunrpc/svcauth_gss.h> |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 41 | #include <linux/sunrpc/clnt.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 42 | #include "xdr4.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 43 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 46 | |
| 47 | /* Globals */ |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 48 | time_t nfsd4_lease = 90; /* default lease time */ |
J. Bruce Fields | efc4bb4f | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 49 | time_t nfsd4_grace = 90; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 50 | static time_t boot_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static u32 current_ownerid = 1; |
| 52 | static u32 current_fileid = 1; |
| 53 | static u32 current_delegid = 1; |
| 54 | static u32 nfs4_init; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 55 | static stateid_t zerostateid; /* bits all 0 */ |
| 56 | static stateid_t onestateid; /* bits all 1 */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 57 | static u64 current_sessionid = 1; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 58 | |
| 59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) |
| 60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | /* forward declarations */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 65 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
| 66 | static void nfs4_set_recdir(char *recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 68 | /* Locking: */ |
| 69 | |
| 70 | /* Currently used for almost all code touching nfsv4 state: */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 71 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 73 | /* |
| 74 | * Currently used for the del_recall_lru and file hash table. In an |
| 75 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 76 | * eventually cover more: |
| 77 | */ |
| 78 | static DEFINE_SPINLOCK(recall_lock); |
| 79 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 80 | static struct kmem_cache *stateowner_slab = NULL; |
| 81 | static struct kmem_cache *file_slab = NULL; |
| 82 | static struct kmem_cache *stateid_slab = NULL; |
| 83 | static struct kmem_cache *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | void |
| 86 | nfs4_lock_state(void) |
| 87 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 88 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | void |
| 92 | nfs4_unlock_state(void) |
| 93 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 94 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static inline u32 |
| 98 | opaque_hashval(const void *ptr, int nbytes) |
| 99 | { |
| 100 | unsigned char *cptr = (unsigned char *) ptr; |
| 101 | |
| 102 | u32 x = 0; |
| 103 | while (nbytes--) { |
| 104 | x *= 37; |
| 105 | x += *cptr++; |
| 106 | } |
| 107 | return x; |
| 108 | } |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | static struct list_head del_recall_lru; |
| 111 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 112 | static inline void |
| 113 | put_nfs4_file(struct nfs4_file *fi) |
| 114 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 115 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
| 116 | list_del(&fi->fi_hash); |
| 117 | spin_unlock(&recall_lock); |
| 118 | iput(fi->fi_inode); |
| 119 | kmem_cache_free(file_slab, fi); |
| 120 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static inline void |
| 124 | get_nfs4_file(struct nfs4_file *fi) |
| 125 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 126 | atomic_inc(&fi->fi_ref); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 127 | } |
| 128 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 129 | static int num_delegations; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 130 | unsigned int max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 131 | |
| 132 | /* |
| 133 | * Open owner state (share locks) |
| 134 | */ |
| 135 | |
| 136 | /* hash tables for nfs4_stateowner */ |
| 137 | #define OWNER_HASH_BITS 8 |
| 138 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 139 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
| 140 | |
| 141 | #define ownerid_hashval(id) \ |
| 142 | ((id) & OWNER_HASH_MASK) |
| 143 | #define ownerstr_hashval(clientid, ownername) \ |
| 144 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) |
| 145 | |
| 146 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; |
| 147 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
| 148 | |
| 149 | /* hash table for nfs4_file */ |
| 150 | #define FILE_HASH_BITS 8 |
| 151 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
| 152 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) |
| 153 | /* hash table for (open)nfs4_stateid */ |
| 154 | #define STATEID_HASH_BITS 10 |
| 155 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) |
| 156 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) |
| 157 | |
| 158 | #define file_hashval(x) \ |
| 159 | hash_ptr(x, FILE_HASH_BITS) |
| 160 | #define stateid_hashval(owner_id, file_id) \ |
| 161 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) |
| 162 | |
| 163 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
| 164 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | static struct nfs4_delegation * |
| 167 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) |
| 168 | { |
| 169 | struct nfs4_delegation *dp; |
| 170 | struct nfs4_file *fp = stp->st_file; |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 171 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | dprintk("NFSD alloc_init_deleg\n"); |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 174 | if (fp->fi_had_conflict) |
| 175 | return NULL; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 176 | if (num_delegations > max_delegations) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 177 | return NULL; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 178 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
| 179 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | return dp; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 181 | num_delegations++; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 182 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 183 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
| 185 | dp->dl_client = clp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 186 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | dp->dl_file = fp; |
| 188 | dp->dl_flock = NULL; |
| 189 | get_file(stp->st_vfs_file); |
| 190 | dp->dl_vfs_file = stp->st_vfs_file; |
| 191 | dp->dl_type = type; |
J. Bruce Fields | b53d40c | 2009-05-01 19:50:00 -0400 | [diff] [blame] | 192 | dp->dl_ident = cb->cb_ident; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 193 | dp->dl_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | dp->dl_stateid.si_stateownerid = current_delegid++; |
| 195 | dp->dl_stateid.si_fileid = 0; |
| 196 | dp->dl_stateid.si_generation = 0; |
J. Bruce Fields | 6c02eaa | 2009-02-02 17:30:51 -0500 | [diff] [blame] | 197 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | dp->dl_time = 0; |
| 199 | atomic_set(&dp->dl_count, 1); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 200 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 201 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 202 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | return dp; |
| 204 | } |
| 205 | |
| 206 | void |
| 207 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 208 | { |
| 209 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 210 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 211 | put_nfs4_file(dp->dl_file); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 212 | kmem_cache_free(deleg_slab, dp); |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 213 | num_delegations--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | } |
| 216 | |
| 217 | /* Remove the associated file_lock first, then remove the delegation. |
| 218 | * lease_modify() is called to remove the FS_LEASE file_lock from |
| 219 | * the i_flock list, eventually calling nfsd's lock_manager |
| 220 | * fl_release_callback. |
| 221 | */ |
| 222 | static void |
| 223 | nfs4_close_delegation(struct nfs4_delegation *dp) |
| 224 | { |
| 225 | struct file *filp = dp->dl_vfs_file; |
| 226 | |
| 227 | dprintk("NFSD: close_delegation dp %p\n",dp); |
| 228 | dp->dl_vfs_file = NULL; |
| 229 | /* The following nfsd_close may not actually close the file, |
| 230 | * but we want to remove the lease in any case. */ |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 231 | if (dp->dl_flock) |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 232 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | /* Called under the state lock. */ |
| 237 | static void |
| 238 | unhash_delegation(struct nfs4_delegation *dp) |
| 239 | { |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 240 | list_del_init(&dp->dl_perfile); |
| 241 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | spin_lock(&recall_lock); |
| 243 | list_del_init(&dp->dl_recall_lru); |
| 244 | spin_unlock(&recall_lock); |
| 245 | nfs4_close_delegation(dp); |
| 246 | nfs4_put_delegation(dp); |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * SETCLIENTID state |
| 251 | */ |
| 252 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 253 | /* client_lock protects the client lru list and session hash table */ |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 254 | static DEFINE_SPINLOCK(client_lock); |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | /* Hash tables for nfs4_clientid state */ |
| 257 | #define CLIENT_HASH_BITS 4 |
| 258 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 259 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 260 | |
| 261 | #define clientid_hashval(id) \ |
| 262 | ((id) & CLIENT_HASH_MASK) |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 263 | #define clientstr_hashval(name) \ |
| 264 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | /* |
| 266 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 267 | * used in reboot/reset lease grace period processing |
| 268 | * |
| 269 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 270 | * setclientid_confirmed info. |
| 271 | * |
| 272 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 273 | * setclientid info. |
| 274 | * |
| 275 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 276 | * for lease renewal. |
| 277 | * |
| 278 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 279 | * for last close replay. |
| 280 | */ |
| 281 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 282 | static int reclaim_str_hashtbl_size = 0; |
| 283 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 284 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 285 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 286 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 287 | static struct list_head client_lru; |
| 288 | static struct list_head close_lru; |
| 289 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 290 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
| 291 | { |
| 292 | list_del(&stp->st_hash); |
| 293 | list_del(&stp->st_perfile); |
| 294 | list_del(&stp->st_perstateowner); |
| 295 | } |
| 296 | |
| 297 | static void free_generic_stateid(struct nfs4_stateid *stp) |
| 298 | { |
| 299 | put_nfs4_file(stp->st_file); |
| 300 | kmem_cache_free(stateid_slab, stp); |
| 301 | } |
| 302 | |
| 303 | static void release_lock_stateid(struct nfs4_stateid *stp) |
| 304 | { |
| 305 | unhash_generic_stateid(stp); |
| 306 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); |
| 307 | free_generic_stateid(stp); |
| 308 | } |
| 309 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 310 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
| 311 | { |
| 312 | struct nfs4_stateid *stp; |
| 313 | |
| 314 | list_del(&sop->so_idhash); |
| 315 | list_del(&sop->so_strhash); |
| 316 | list_del(&sop->so_perstateid); |
| 317 | while (!list_empty(&sop->so_stateids)) { |
| 318 | stp = list_first_entry(&sop->so_stateids, |
| 319 | struct nfs4_stateid, st_perstateowner); |
| 320 | release_lock_stateid(stp); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | static void release_lockowner(struct nfs4_stateowner *sop) |
| 325 | { |
| 326 | unhash_lockowner(sop); |
| 327 | nfs4_put_stateowner(sop); |
| 328 | } |
| 329 | |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 330 | static void |
| 331 | release_stateid_lockowners(struct nfs4_stateid *open_stp) |
| 332 | { |
| 333 | struct nfs4_stateowner *lock_sop; |
| 334 | |
| 335 | while (!list_empty(&open_stp->st_lockowners)) { |
| 336 | lock_sop = list_entry(open_stp->st_lockowners.next, |
| 337 | struct nfs4_stateowner, so_perstateid); |
| 338 | /* list_del(&open_stp->st_lockowners); */ |
| 339 | BUG_ON(lock_sop->so_is_open_owner); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 340 | release_lockowner(lock_sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 341 | } |
| 342 | } |
| 343 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 344 | static void release_open_stateid(struct nfs4_stateid *stp) |
| 345 | { |
| 346 | unhash_generic_stateid(stp); |
| 347 | release_stateid_lockowners(stp); |
| 348 | nfsd_close(stp->st_vfs_file); |
| 349 | free_generic_stateid(stp); |
| 350 | } |
| 351 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 352 | static void unhash_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 353 | { |
| 354 | struct nfs4_stateid *stp; |
| 355 | |
| 356 | list_del(&sop->so_idhash); |
| 357 | list_del(&sop->so_strhash); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 358 | list_del(&sop->so_perclient); |
| 359 | list_del(&sop->so_perstateid); /* XXX: necessary? */ |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 360 | while (!list_empty(&sop->so_stateids)) { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 361 | stp = list_first_entry(&sop->so_stateids, |
| 362 | struct nfs4_stateid, st_perstateowner); |
| 363 | release_open_stateid(stp); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 364 | } |
| 365 | } |
| 366 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 367 | static void release_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 368 | { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 369 | unhash_openowner(sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 370 | list_del(&sop->so_close_lru); |
| 371 | nfs4_put_stateowner(sop); |
| 372 | } |
| 373 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 374 | #define SESSION_HASH_SIZE 512 |
| 375 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; |
| 376 | |
| 377 | static inline int |
| 378 | hash_sessionid(struct nfs4_sessionid *sessionid) |
| 379 | { |
| 380 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; |
| 381 | |
| 382 | return sid->sequence % SESSION_HASH_SIZE; |
| 383 | } |
| 384 | |
| 385 | static inline void |
| 386 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 387 | { |
| 388 | u32 *ptr = (u32 *)(&sessionid->data[0]); |
| 389 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 390 | } |
| 391 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 392 | static void |
| 393 | gen_sessionid(struct nfsd4_session *ses) |
| 394 | { |
| 395 | struct nfs4_client *clp = ses->se_client; |
| 396 | struct nfsd4_sessionid *sid; |
| 397 | |
| 398 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; |
| 399 | sid->clientid = clp->cl_clientid; |
| 400 | sid->sequence = current_sessionid++; |
| 401 | sid->reserved = 0; |
| 402 | } |
| 403 | |
| 404 | /* |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 405 | * The protocol defines ca_maxresponssize_cached to include the size of |
| 406 | * the rpc header, but all we need to cache is the data starting after |
| 407 | * the end of the initial SEQUENCE operation--the rest we regenerate |
| 408 | * each time. Therefore we can advertise a ca_maxresponssize_cached |
| 409 | * value that is the number of bytes in our cache plus a few additional |
| 410 | * bytes. In order to stay on the safe side, and not promise more than |
| 411 | * we can cache, those additional bytes must be the minimum possible: 24 |
| 412 | * bytes of rpc header (xid through accept state, with AUTH_NULL |
| 413 | * verifier), 12 for the compound header (with zero-length tag), and 44 |
| 414 | * for the SEQUENCE op response: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 415 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 416 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) |
| 417 | |
| 418 | /* |
| 419 | * Give the client the number of ca_maxresponsesize_cached slots it |
| 420 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, |
| 421 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more |
| 422 | * than NFSD_MAX_SLOTS_PER_SESSION. |
| 423 | * |
| 424 | * If we run out of reserved DRC memory we should (up to a point) |
| 425 | * re-negotiate active sessions and reduce their slot usage to make |
| 426 | * rooom for new connections. For now we just fail the create session. |
| 427 | */ |
| 428 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 429 | { |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 430 | int mem, size = fchan->maxresp_cached; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 431 | |
Andy Adamson | 5d77ddf | 2009-06-16 04:19:38 +0300 | [diff] [blame] | 432 | if (fchan->maxreqs < 1) |
| 433 | return nfserr_inval; |
Andy Adamson | 5d77ddf | 2009-06-16 04:19:38 +0300 | [diff] [blame] | 434 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 435 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
| 436 | size = NFSD_MIN_HDR_SEQ_SZ; |
| 437 | size -= NFSD_MIN_HDR_SEQ_SZ; |
| 438 | if (size > NFSD_SLOT_CACHE_SIZE) |
| 439 | size = NFSD_SLOT_CACHE_SIZE; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 440 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 441 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
| 442 | mem = fchan->maxreqs * size; |
| 443 | if (mem > NFSD_MAX_MEM_PER_SESSION) { |
| 444 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; |
| 445 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) |
| 446 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; |
| 447 | mem = fchan->maxreqs * size; |
| 448 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 449 | |
Andy Adamson | 4bd9b0f4 | 2009-06-24 15:37:45 -0400 | [diff] [blame] | 450 | spin_lock(&nfsd_drc_lock); |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 451 | /* bound the total session drc memory ussage */ |
| 452 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { |
| 453 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; |
| 454 | mem = fchan->maxreqs * size; |
| 455 | } |
Andy Adamson | 0c19305 | 2009-07-27 19:09:19 -0400 | [diff] [blame] | 456 | nfsd_drc_mem_used += mem; |
Andy Adamson | 4bd9b0f4 | 2009-06-24 15:37:45 -0400 | [diff] [blame] | 457 | spin_unlock(&nfsd_drc_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 458 | |
Andy Adamson | b101ebb | 2009-07-27 18:40:09 -0400 | [diff] [blame] | 459 | if (fchan->maxreqs == 0) |
Andy Adamson | bdac86e | 2009-08-28 08:45:03 -0400 | [diff] [blame] | 460 | return nfserr_serverfault; |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 461 | |
| 462 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; |
Andy Adamson | b101ebb | 2009-07-27 18:40:09 -0400 | [diff] [blame] | 463 | return 0; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* |
| 467 | * fchan holds the client values on input, and the server values on output |
Andy Adamson | ddc04fd | 2009-09-23 21:32:21 -0400 | [diff] [blame] | 468 | * sv_max_mesg is the maximum payload plus one page for overhead. |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 469 | */ |
| 470 | static int init_forechannel_attrs(struct svc_rqst *rqstp, |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 471 | struct nfsd4_channel_attrs *session_fchan, |
| 472 | struct nfsd4_channel_attrs *fchan) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 473 | { |
| 474 | int status = 0; |
Andy Adamson | ddc04fd | 2009-09-23 21:32:21 -0400 | [diff] [blame] | 475 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 476 | |
| 477 | /* headerpadsz set to zero in encode routine */ |
| 478 | |
| 479 | /* Use the client's max request and max response size if possible */ |
| 480 | if (fchan->maxreq_sz > maxcount) |
| 481 | fchan->maxreq_sz = maxcount; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 482 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 483 | |
| 484 | if (fchan->maxresp_sz > maxcount) |
| 485 | fchan->maxresp_sz = maxcount; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 486 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 487 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 488 | /* Use the client's maxops if possible */ |
| 489 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) |
| 490 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 491 | session_fchan->maxops = fchan->maxops; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 492 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 493 | /* FIXME: Error means no more DRC pages so the server should |
| 494 | * recover pages from existing sessions. For now fail session |
| 495 | * creation. |
| 496 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 497 | status = set_forechannel_drc_size(fchan); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 498 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 499 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 500 | session_fchan->maxreqs = fchan->maxreqs; |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 501 | |
| 502 | dprintk("%s status %d\n", __func__, status); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 503 | return status; |
| 504 | } |
| 505 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 506 | static void |
| 507 | free_session_slots(struct nfsd4_session *ses) |
| 508 | { |
| 509 | int i; |
| 510 | |
| 511 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) |
| 512 | kfree(ses->se_slots[i]); |
| 513 | } |
| 514 | |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 515 | /* |
| 516 | * We don't actually need to cache the rpc and session headers, so we |
| 517 | * can allocate a little less for each slot: |
| 518 | */ |
| 519 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) |
| 520 | { |
| 521 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; |
| 522 | } |
| 523 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 524 | static int |
| 525 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, |
| 526 | struct nfsd4_create_session *cses) |
| 527 | { |
| 528 | struct nfsd4_session *new, tmp; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 529 | struct nfsd4_slot *sp; |
| 530 | int idx, slotsize, cachesize, i; |
| 531 | int status; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 532 | |
| 533 | memset(&tmp, 0, sizeof(tmp)); |
| 534 | |
| 535 | /* FIXME: For now, we just accept the client back channel attributes. */ |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 536 | tmp.se_bchannel = cses->back_channel; |
| 537 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, |
| 538 | &cses->fore_channel); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 539 | if (status) |
| 540 | goto out; |
| 541 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 542 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
| 543 | + sizeof(struct nfsd4_session) > PAGE_SIZE); |
| 544 | |
| 545 | status = nfserr_serverfault; |
| 546 | /* allocate struct nfsd4_session and slot table pointers in one piece */ |
| 547 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 548 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
| 549 | if (!new) |
| 550 | goto out; |
| 551 | |
| 552 | memcpy(new, &tmp, sizeof(*new)); |
| 553 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 554 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 555 | cachesize = slot_bytes(&new->se_fchannel); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 556 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
| 557 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); |
| 558 | if (!sp) |
| 559 | goto out_free; |
| 560 | new->se_slots[i] = sp; |
| 561 | } |
| 562 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 563 | new->se_client = clp; |
| 564 | gen_sessionid(new); |
| 565 | idx = hash_sessionid(&new->se_sessionid); |
| 566 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, |
| 567 | NFS4_MAX_SESSIONID_LEN); |
| 568 | |
| 569 | new->se_flags = cses->flags; |
| 570 | kref_init(&new->se_ref); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 571 | spin_lock(&client_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 572 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
| 573 | list_add(&new->se_perclnt, &clp->cl_sessions); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 574 | spin_unlock(&client_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 575 | |
| 576 | status = nfs_ok; |
| 577 | out: |
| 578 | return status; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 579 | out_free: |
| 580 | free_session_slots(new); |
| 581 | kfree(new); |
| 582 | goto out; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 583 | } |
| 584 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 585 | /* caller must hold client_lock */ |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 586 | static struct nfsd4_session * |
| 587 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) |
| 588 | { |
| 589 | struct nfsd4_session *elem; |
| 590 | int idx; |
| 591 | |
| 592 | dump_sessionid(__func__, sessionid); |
| 593 | idx = hash_sessionid(sessionid); |
| 594 | dprintk("%s: idx is %d\n", __func__, idx); |
| 595 | /* Search in the appropriate list */ |
| 596 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { |
| 597 | dump_sessionid("list traversal", &elem->se_sessionid); |
| 598 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
| 599 | NFS4_MAX_SESSIONID_LEN)) { |
| 600 | return elem; |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | dprintk("%s: session not found\n", __func__); |
| 605 | return NULL; |
| 606 | } |
| 607 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 608 | /* caller must hold client_lock */ |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 609 | static void |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 610 | unhash_session(struct nfsd4_session *ses) |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 611 | { |
| 612 | list_del(&ses->se_hash); |
| 613 | list_del(&ses->se_perclnt); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 614 | } |
| 615 | |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 616 | void |
| 617 | free_session(struct kref *kref) |
| 618 | { |
| 619 | struct nfsd4_session *ses; |
J. Bruce Fields | dd829c4 | 2009-10-21 17:54:13 -0400 | [diff] [blame] | 620 | int mem; |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 621 | |
| 622 | ses = container_of(kref, struct nfsd4_session, se_ref); |
Andy Adamson | be98d1b | 2009-07-27 18:49:05 -0400 | [diff] [blame] | 623 | spin_lock(&nfsd_drc_lock); |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 624 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
J. Bruce Fields | dd829c4 | 2009-10-21 17:54:13 -0400 | [diff] [blame] | 625 | nfsd_drc_mem_used -= mem; |
Andy Adamson | be98d1b | 2009-07-27 18:49:05 -0400 | [diff] [blame] | 626 | spin_unlock(&nfsd_drc_lock); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 627 | free_session_slots(ses); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 628 | kfree(ses); |
| 629 | } |
| 630 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 631 | /* must be called under the client_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | static inline void |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 633 | renew_client_locked(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | { |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 635 | if (is_client_expired(clp)) { |
| 636 | dprintk("%s: client (clientid %08x/%08x) already expired\n", |
| 637 | __func__, |
| 638 | clp->cl_clientid.cl_boot, |
| 639 | clp->cl_clientid.cl_id); |
| 640 | return; |
| 641 | } |
| 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | /* |
| 644 | * Move client to the end to the LRU list. |
| 645 | */ |
| 646 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 647 | clp->cl_clientid.cl_boot, |
| 648 | clp->cl_clientid.cl_id); |
| 649 | list_move_tail(&clp->cl_lru, &client_lru); |
| 650 | clp->cl_time = get_seconds(); |
| 651 | } |
| 652 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 653 | static inline void |
| 654 | renew_client(struct nfs4_client *clp) |
| 655 | { |
| 656 | spin_lock(&client_lock); |
| 657 | renew_client_locked(clp); |
| 658 | spin_unlock(&client_lock); |
| 659 | } |
| 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 662 | static int |
| 663 | STALE_CLIENTID(clientid_t *clid) |
| 664 | { |
| 665 | if (clid->cl_boot == boot_time) |
| 666 | return 0; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 667 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
| 668 | clid->cl_boot, clid->cl_id, boot_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | return 1; |
| 670 | } |
| 671 | |
| 672 | /* |
| 673 | * XXX Should we use a slab cache ? |
| 674 | * This type of memory management is somewhat inefficient, but we use it |
| 675 | * anyway since SETCLIENTID is not a common operation. |
| 676 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 677 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | { |
| 679 | struct nfs4_client *clp; |
| 680 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 681 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 682 | if (clp == NULL) |
| 683 | return NULL; |
| 684 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); |
| 685 | if (clp->cl_name.data == NULL) { |
| 686 | kfree(clp); |
| 687 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 689 | memcpy(clp->cl_name.data, name.data, name.len); |
| 690 | clp->cl_name.len = name.len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | return clp; |
| 692 | } |
| 693 | |
| 694 | static inline void |
| 695 | free_client(struct nfs4_client *clp) |
| 696 | { |
| 697 | if (clp->cl_cred.cr_group_info) |
| 698 | put_group_info(clp->cl_cred.cr_group_info); |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 699 | kfree(clp->cl_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | kfree(clp->cl_name.data); |
| 701 | kfree(clp); |
| 702 | } |
| 703 | |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame^] | 704 | void |
| 705 | release_session_client(struct nfsd4_session *session) |
| 706 | { |
| 707 | struct nfs4_client *clp = session->se_client; |
| 708 | |
| 709 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) |
| 710 | return; |
| 711 | if (is_client_expired(clp)) { |
| 712 | free_client(clp); |
| 713 | session->se_client = NULL; |
| 714 | } else |
| 715 | renew_client_locked(clp); |
| 716 | spin_unlock(&client_lock); |
| 717 | nfsd4_put_session(session); |
| 718 | } |
| 719 | |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 720 | /* must be called under the client_lock */ |
| 721 | static inline void |
| 722 | unhash_client_locked(struct nfs4_client *clp) |
| 723 | { |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 724 | mark_client_expired(clp); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 725 | list_del(&clp->cl_lru); |
| 726 | while (!list_empty(&clp->cl_sessions)) { |
| 727 | struct nfsd4_session *ses; |
| 728 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |
| 729 | se_perclnt); |
| 730 | unhash_session(ses); |
| 731 | nfsd4_put_session(ses); |
| 732 | } |
| 733 | } |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | static void |
| 736 | expire_client(struct nfs4_client *clp) |
| 737 | { |
| 738 | struct nfs4_stateowner *sop; |
| 739 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | struct list_head reaplist; |
| 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | INIT_LIST_HEAD(&reaplist); |
| 743 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 744 | while (!list_empty(&clp->cl_delegations)) { |
| 745 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 747 | dp->dl_flock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 748 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | list_move(&dp->dl_recall_lru, &reaplist); |
| 750 | } |
| 751 | spin_unlock(&recall_lock); |
| 752 | while (!list_empty(&reaplist)) { |
| 753 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 754 | list_del_init(&dp->dl_recall_lru); |
| 755 | unhash_delegation(dp); |
| 756 | } |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 757 | while (!list_empty(&clp->cl_openowners)) { |
| 758 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 759 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 761 | nfsd4_set_callback_client(clp, NULL); |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 762 | if (clp->cl_cb_conn.cb_xprt) |
| 763 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 764 | list_del(&clp->cl_idhash); |
| 765 | list_del(&clp->cl_strhash); |
| 766 | spin_lock(&client_lock); |
| 767 | unhash_client_locked(clp); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 768 | if (atomic_read(&clp->cl_refcount) == 0) |
| 769 | free_client(clp); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 770 | spin_unlock(&client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
| 772 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 773 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 774 | { |
| 775 | memcpy(target->cl_verifier.data, source->data, |
| 776 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 779 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 780 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 782 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 783 | } |
| 784 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 785 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 786 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | target->cr_uid = source->cr_uid; |
| 788 | target->cr_gid = source->cr_gid; |
| 789 | target->cr_group_info = source->cr_group_info; |
| 790 | get_group_info(target->cr_group_info); |
| 791 | } |
| 792 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 793 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 794 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 795 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 799 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 800 | { |
| 801 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 805 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 806 | { |
| 807 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | /* XXX what about NGROUP */ |
| 811 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 812 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 813 | { |
| 814 | return cr1->cr_uid == cr2->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | } |
| 816 | |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 817 | static void gen_clid(struct nfs4_client *clp) |
| 818 | { |
| 819 | static u32 current_clientid = 1; |
| 820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | clp->cl_clientid.cl_boot = boot_time; |
| 822 | clp->cl_clientid.cl_id = current_clientid++; |
| 823 | } |
| 824 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 825 | static void gen_confirm(struct nfs4_client *clp) |
| 826 | { |
| 827 | static u32 i; |
| 828 | u32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | p = (u32 *)clp->cl_confirm.data; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 831 | *p++ = get_seconds(); |
| 832 | *p++ = i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 835 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
| 836 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
| 837 | { |
| 838 | struct nfs4_client *clp; |
| 839 | struct sockaddr *sa = svc_addr(rqstp); |
| 840 | char *princ; |
| 841 | |
| 842 | clp = alloc_client(name); |
| 843 | if (clp == NULL) |
| 844 | return NULL; |
| 845 | |
| 846 | princ = svc_gss_principal(rqstp); |
| 847 | if (princ) { |
| 848 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); |
| 849 | if (clp->cl_principal == NULL) { |
| 850 | free_client(clp); |
| 851 | return NULL; |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 856 | atomic_set(&clp->cl_refcount, 0); |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 857 | atomic_set(&clp->cl_cb_set, 0); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 858 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 859 | INIT_LIST_HEAD(&clp->cl_strhash); |
| 860 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 861 | INIT_LIST_HEAD(&clp->cl_delegations); |
| 862 | INIT_LIST_HEAD(&clp->cl_sessions); |
| 863 | INIT_LIST_HEAD(&clp->cl_lru); |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 864 | clp->cl_time = get_seconds(); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 865 | clear_bit(0, &clp->cl_cb_slot_busy); |
| 866 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); |
| 867 | copy_verf(clp, verf); |
| 868 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); |
| 869 | clp->cl_flavor = rqstp->rq_flavor; |
| 870 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
| 871 | gen_confirm(clp); |
| 872 | |
| 873 | return clp; |
| 874 | } |
| 875 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 876 | static int check_name(struct xdr_netobj name) |
| 877 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (name.len == 0) |
| 879 | return 0; |
| 880 | if (name.len > NFS4_OPAQUE_LIMIT) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 881 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | return 0; |
| 883 | } |
| 884 | return 1; |
| 885 | } |
| 886 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 887 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 889 | { |
| 890 | unsigned int idhashval; |
| 891 | |
| 892 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 893 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 894 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 895 | renew_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 898 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | move_to_confirmed(struct nfs4_client *clp) |
| 900 | { |
| 901 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 902 | unsigned int strhashval; |
| 903 | |
| 904 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 905 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 906 | strhashval = clientstr_hashval(clp->cl_recdir); |
Benny Halevy | 328efba | 2010-05-12 00:12:51 +0300 | [diff] [blame] | 907 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | renew_client(clp); |
| 909 | } |
| 910 | |
| 911 | static struct nfs4_client * |
| 912 | find_confirmed_client(clientid_t *clid) |
| 913 | { |
| 914 | struct nfs4_client *clp; |
| 915 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 916 | |
| 917 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 918 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | return clp; |
| 920 | } |
| 921 | return NULL; |
| 922 | } |
| 923 | |
| 924 | static struct nfs4_client * |
| 925 | find_unconfirmed_client(clientid_t *clid) |
| 926 | { |
| 927 | struct nfs4_client *clp; |
| 928 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 929 | |
| 930 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 931 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | return clp; |
| 933 | } |
| 934 | return NULL; |
| 935 | } |
| 936 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 937 | /* |
| 938 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id |
| 939 | * parameter. Matching is based on the fact the at least one of the |
| 940 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 |
| 941 | * |
| 942 | * FIXME: we need to unify the clientid namespaces for nfsv4.x |
| 943 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID |
| 944 | * and SET_CLIENTID{,_CONFIRM} |
| 945 | */ |
| 946 | static inline int |
| 947 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) |
| 948 | { |
| 949 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); |
| 950 | return use_exchange_id == has_exchange_flags; |
| 951 | } |
| 952 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 953 | static struct nfs4_client * |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 954 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
| 955 | bool use_exchange_id) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 956 | { |
| 957 | struct nfs4_client *clp; |
| 958 | |
| 959 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 960 | if (same_name(clp->cl_recdir, dname) && |
| 961 | match_clientid_establishment(clp, use_exchange_id)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 962 | return clp; |
| 963 | } |
| 964 | return NULL; |
| 965 | } |
| 966 | |
| 967 | static struct nfs4_client * |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 968 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
| 969 | bool use_exchange_id) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 970 | { |
| 971 | struct nfs4_client *clp; |
| 972 | |
| 973 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 974 | if (same_name(clp->cl_recdir, dname) && |
| 975 | match_clientid_establishment(clp, use_exchange_id)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 976 | return clp; |
| 977 | } |
| 978 | return NULL; |
| 979 | } |
| 980 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 981 | static void |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 982 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | { |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 984 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 985 | unsigned short expected_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 987 | /* Currently, we only support tcp and tcp6 for the callback channel */ |
| 988 | if (se->se_callback_netid_len == 3 && |
| 989 | !memcmp(se->se_callback_netid_val, "tcp", 3)) |
| 990 | expected_family = AF_INET; |
| 991 | else if (se->se_callback_netid_len == 4 && |
| 992 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) |
| 993 | expected_family = AF_INET6; |
| 994 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | goto out_err; |
| 996 | |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 997 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
| 998 | se->se_callback_addr_len, |
| 999 | (struct sockaddr *) &cb->cb_addr, |
| 1000 | sizeof(cb->cb_addr)); |
| 1001 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 1002 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | goto out_err; |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1004 | |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 1005 | if (cb->cb_addr.ss_family == AF_INET6) |
| 1006 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; |
| 1007 | |
Andy Adamson | ab52ae6 | 2009-06-16 04:20:53 +0300 | [diff] [blame] | 1008 | cb->cb_minorversion = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | cb->cb_prog = se->se_callback_prog; |
| 1010 | cb->cb_ident = se->se_callback_ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | return; |
| 1012 | out_err: |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1013 | cb->cb_addr.ss_family = AF_UNSPEC; |
| 1014 | cb->cb_addrlen = 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1015 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | "will not receive delegations\n", |
| 1017 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | return; |
| 1020 | } |
| 1021 | |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1022 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1023 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1024 | */ |
| 1025 | void |
| 1026 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
| 1027 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1028 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 1029 | unsigned int base; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1030 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1031 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1032 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1033 | slot->sl_opcnt = resp->opcnt; |
| 1034 | slot->sl_status = resp->cstate.status; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1035 | |
| 1036 | if (nfsd4_not_cached(resp)) { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1037 | slot->sl_datalen = 0; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1038 | return; |
| 1039 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1040 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
| 1041 | base = (char *)resp->cstate.datap - |
| 1042 | (char *)resp->xbuf->head[0].iov_base; |
| 1043 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, |
| 1044 | slot->sl_datalen)) |
| 1045 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
| 1046 | return; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /* |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1050 | * Encode the replay sequence operation from the slot values. |
| 1051 | * If cachethis is FALSE encode the uncached rep error on the next |
| 1052 | * operation which sets resp->p and increments resp->opcnt for |
| 1053 | * nfs4svc_encode_compoundres. |
| 1054 | * |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1055 | */ |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1056 | static __be32 |
| 1057 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, |
| 1058 | struct nfsd4_compoundres *resp) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1059 | { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1060 | struct nfsd4_op *op; |
| 1061 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1062 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1063 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1064 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1065 | |
| 1066 | /* Encode the replayed sequence operation */ |
| 1067 | op = &args->ops[resp->opcnt - 1]; |
| 1068 | nfsd4_encode_operation(resp, op); |
| 1069 | |
| 1070 | /* Return nfserr_retry_uncached_rep in next operation. */ |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1071 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1072 | op = &args->ops[resp->opcnt++]; |
| 1073 | op->status = nfserr_retry_uncached_rep; |
| 1074 | nfsd4_encode_operation(resp, op); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1075 | } |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1076 | return op->status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1080 | * The sequence operation is not cached because we can use the slot and |
| 1081 | * session values. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1082 | */ |
| 1083 | __be32 |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1084 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
| 1085 | struct nfsd4_sequence *seq) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1086 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1087 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1088 | __be32 status; |
| 1089 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1090 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1091 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1092 | /* Either returns 0 or nfserr_retry_uncached */ |
| 1093 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
| 1094 | if (status == nfserr_retry_uncached_rep) |
| 1095 | return status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1096 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1097 | /* The sequence operation has been encoded, cstate->datap set. */ |
| 1098 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1099 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1100 | resp->opcnt = slot->sl_opcnt; |
| 1101 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); |
| 1102 | status = slot->sl_status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1103 | |
| 1104 | return status; |
| 1105 | } |
| 1106 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1107 | /* |
| 1108 | * Set the exchange_id flags returned by the server. |
| 1109 | */ |
| 1110 | static void |
| 1111 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) |
| 1112 | { |
| 1113 | /* pNFS is not supported */ |
| 1114 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
| 1115 | |
| 1116 | /* Referrals are supported, Migration is not. */ |
| 1117 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; |
| 1118 | |
| 1119 | /* set the wire flags to return to client. */ |
| 1120 | clid->flags = new->cl_exchange_flags; |
| 1121 | } |
| 1122 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1123 | __be32 |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1124 | nfsd4_exchange_id(struct svc_rqst *rqstp, |
| 1125 | struct nfsd4_compound_state *cstate, |
| 1126 | struct nfsd4_exchange_id *exid) |
| 1127 | { |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1128 | struct nfs4_client *unconf, *conf, *new; |
| 1129 | int status; |
| 1130 | unsigned int strhashval; |
| 1131 | char dname[HEXDIR_LEN]; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1132 | char addr_str[INET6_ADDRSTRLEN]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1133 | nfs4_verifier verf = exid->verifier; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1134 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1135 | |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1136 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1137 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1138 | "ip_addr=%s flags %x, spa_how %d\n", |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1139 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1140 | addr_str, exid->flags, exid->spa_how); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1141 | |
| 1142 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) |
| 1143 | return nfserr_inval; |
| 1144 | |
| 1145 | /* Currently only support SP4_NONE */ |
| 1146 | switch (exid->spa_how) { |
| 1147 | case SP4_NONE: |
| 1148 | break; |
| 1149 | case SP4_SSV: |
| 1150 | return nfserr_encr_alg_unsupp; |
| 1151 | default: |
| 1152 | BUG(); /* checked by xdr code */ |
| 1153 | case SP4_MACH_CRED: |
| 1154 | return nfserr_serverfault; /* no excuse :-/ */ |
| 1155 | } |
| 1156 | |
| 1157 | status = nfs4_make_rec_clidname(dname, &exid->clname); |
| 1158 | |
| 1159 | if (status) |
| 1160 | goto error; |
| 1161 | |
| 1162 | strhashval = clientstr_hashval(dname); |
| 1163 | |
| 1164 | nfs4_lock_state(); |
| 1165 | status = nfs_ok; |
| 1166 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1167 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1168 | if (conf) { |
| 1169 | if (!same_verf(&verf, &conf->cl_verifier)) { |
| 1170 | /* 18.35.4 case 8 */ |
| 1171 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1172 | status = nfserr_not_same; |
| 1173 | goto out; |
| 1174 | } |
| 1175 | /* Client reboot: destroy old state */ |
| 1176 | expire_client(conf); |
| 1177 | goto out_new; |
| 1178 | } |
| 1179 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
| 1180 | /* 18.35.4 case 9 */ |
| 1181 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1182 | status = nfserr_perm; |
| 1183 | goto out; |
| 1184 | } |
| 1185 | expire_client(conf); |
| 1186 | goto out_new; |
| 1187 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1188 | /* |
| 1189 | * Set bit when the owner id and verifier map to an already |
| 1190 | * confirmed client id (18.35.3). |
| 1191 | */ |
| 1192 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; |
| 1193 | |
| 1194 | /* |
| 1195 | * Falling into 18.35.4 case 2, possible router replay. |
| 1196 | * Leave confirmed record intact and return same result. |
| 1197 | */ |
| 1198 | copy_verf(conf, &verf); |
| 1199 | new = conf; |
| 1200 | goto out_copy; |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 1201 | } |
| 1202 | |
| 1203 | /* 18.35.4 case 7 */ |
| 1204 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1205 | status = nfserr_noent; |
| 1206 | goto out; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1207 | } |
| 1208 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1209 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1210 | if (unconf) { |
| 1211 | /* |
| 1212 | * Possible retry or client restart. Per 18.35.4 case 4, |
| 1213 | * a new unconfirmed record should be generated regardless |
| 1214 | * of whether any properties have changed. |
| 1215 | */ |
| 1216 | expire_client(unconf); |
| 1217 | } |
| 1218 | |
| 1219 | out_new: |
| 1220 | /* Normal case */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1221 | new = create_client(exid->clname, dname, rqstp, &verf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1222 | if (new == NULL) { |
Andy Adamson | bdac86e | 2009-08-28 08:45:03 -0400 | [diff] [blame] | 1223 | status = nfserr_serverfault; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1224 | goto out; |
| 1225 | } |
| 1226 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1227 | gen_clid(new); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1228 | add_to_unconfirmed(new, strhashval); |
| 1229 | out_copy: |
| 1230 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1231 | exid->clientid.cl_id = new->cl_clientid.cl_id; |
| 1232 | |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1233 | exid->seqid = 1; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1234 | nfsd4_set_ex_flags(new, exid); |
| 1235 | |
| 1236 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1237 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1238 | status = nfs_ok; |
| 1239 | |
| 1240 | out: |
| 1241 | nfs4_unlock_state(); |
| 1242 | error: |
| 1243 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); |
| 1244 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1245 | } |
| 1246 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1247 | static int |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1248 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1249 | { |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1250 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
| 1251 | slot_seqid); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1252 | |
| 1253 | /* The slot is in use, and no response has been sent. */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1254 | if (slot_inuse) { |
| 1255 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1256 | return nfserr_jukebox; |
| 1257 | else |
| 1258 | return nfserr_seq_misordered; |
| 1259 | } |
| 1260 | /* Normal */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1261 | if (likely(seqid == slot_seqid + 1)) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1262 | return nfs_ok; |
| 1263 | /* Replay */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1264 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1265 | return nfserr_replay_cache; |
| 1266 | /* Wraparound */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1267 | if (seqid == 1 && (slot_seqid + 1) == 0) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1268 | return nfs_ok; |
| 1269 | /* Misordered replay or misordered new request */ |
| 1270 | return nfserr_seq_misordered; |
| 1271 | } |
| 1272 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1273 | /* |
| 1274 | * Cache the create session result into the create session single DRC |
| 1275 | * slot cache by saving the xdr structure. sl_seqid has been set. |
| 1276 | * Do this for solo or embedded create session operations. |
| 1277 | */ |
| 1278 | static void |
| 1279 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, |
| 1280 | struct nfsd4_clid_slot *slot, int nfserr) |
| 1281 | { |
| 1282 | slot->sl_status = nfserr; |
| 1283 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); |
| 1284 | } |
| 1285 | |
| 1286 | static __be32 |
| 1287 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, |
| 1288 | struct nfsd4_clid_slot *slot) |
| 1289 | { |
| 1290 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); |
| 1291 | return slot->sl_status; |
| 1292 | } |
| 1293 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1294 | __be32 |
| 1295 | nfsd4_create_session(struct svc_rqst *rqstp, |
| 1296 | struct nfsd4_compound_state *cstate, |
| 1297 | struct nfsd4_create_session *cr_ses) |
| 1298 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1299 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1300 | struct nfs4_client *conf, *unconf; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1301 | struct nfsd4_clid_slot *cs_slot = NULL; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1302 | int status = 0; |
| 1303 | |
| 1304 | nfs4_lock_state(); |
| 1305 | unconf = find_unconfirmed_client(&cr_ses->clientid); |
| 1306 | conf = find_confirmed_client(&cr_ses->clientid); |
| 1307 | |
| 1308 | if (conf) { |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1309 | cs_slot = &conf->cl_cs_slot; |
| 1310 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1311 | if (status == nfserr_replay_cache) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1312 | dprintk("Got a create_session replay! seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1313 | cs_slot->sl_seqid); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1314 | /* Return the cached reply status */ |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1315 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1316 | goto out; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1317 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1318 | status = nfserr_seq_misordered; |
| 1319 | dprintk("Sequence misordered!\n"); |
| 1320 | dprintk("Expected seqid= %d but got seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1321 | cs_slot->sl_seqid, cr_ses->seqid); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1322 | goto out; |
| 1323 | } |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1324 | cs_slot->sl_seqid++; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1325 | } else if (unconf) { |
| 1326 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1327 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1328 | status = nfserr_clid_inuse; |
| 1329 | goto out; |
| 1330 | } |
| 1331 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1332 | cs_slot = &unconf->cl_cs_slot; |
| 1333 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1334 | if (status) { |
| 1335 | /* an unconfirmed replay returns misordered */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1336 | status = nfserr_seq_misordered; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1337 | goto out_cache; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1338 | } |
| 1339 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1340 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1341 | move_to_confirmed(unconf); |
| 1342 | |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 1343 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 1344 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
| 1345 | svc_xprt_get(rqstp->rq_xprt); |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 1346 | rpc_copy_addr( |
| 1347 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, |
| 1348 | sa); |
| 1349 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); |
| 1350 | unconf->cl_cb_conn.cb_minorversion = |
| 1351 | cstate->minorversion; |
| 1352 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1353 | unconf->cl_cb_seq_nr = 1; |
J. Bruce Fields | 4b21d0d | 2010-03-07 23:39:01 -0500 | [diff] [blame] | 1354 | nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 1355 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1356 | conf = unconf; |
| 1357 | } else { |
| 1358 | status = nfserr_stale_clientid; |
| 1359 | goto out; |
| 1360 | } |
| 1361 | |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 1362 | /* |
| 1363 | * We do not support RDMA or persistent sessions |
| 1364 | */ |
| 1365 | cr_ses->flags &= ~SESSION4_PERSIST; |
| 1366 | cr_ses->flags &= ~SESSION4_RDMA; |
| 1367 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1368 | status = alloc_init_session(rqstp, conf, cr_ses); |
| 1369 | if (status) |
| 1370 | goto out; |
| 1371 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1372 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
| 1373 | NFS4_MAX_SESSIONID_LEN); |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1374 | cr_ses->seqid = cs_slot->sl_seqid; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1375 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1376 | out_cache: |
| 1377 | /* cache solo and embedded create sessions under the state lock */ |
| 1378 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1379 | out: |
| 1380 | nfs4_unlock_state(); |
| 1381 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1382 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1383 | } |
| 1384 | |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 1385 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
| 1386 | { |
| 1387 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| 1388 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; |
| 1389 | |
| 1390 | return argp->opcnt == resp->opcnt; |
| 1391 | } |
| 1392 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1393 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
| 1394 | { |
| 1395 | if (!session) |
| 1396 | return 0; |
| 1397 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); |
| 1398 | } |
| 1399 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1400 | __be32 |
| 1401 | nfsd4_destroy_session(struct svc_rqst *r, |
| 1402 | struct nfsd4_compound_state *cstate, |
| 1403 | struct nfsd4_destroy_session *sessionid) |
| 1404 | { |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1405 | struct nfsd4_session *ses; |
| 1406 | u32 status = nfserr_badsession; |
| 1407 | |
| 1408 | /* Notes: |
| 1409 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid |
| 1410 | * - Should we return nfserr_back_chan_busy if waiting for |
| 1411 | * callbacks on to-be-destroyed session? |
| 1412 | * - Do we need to clear any callback info from previous session? |
| 1413 | */ |
| 1414 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1415 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 1416 | if (!nfsd4_last_compound_op(r)) |
| 1417 | return nfserr_not_only_op; |
| 1418 | } |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1419 | dump_sessionid(__func__, &sessionid->sessionid); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1420 | spin_lock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1421 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
| 1422 | if (!ses) { |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1423 | spin_unlock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1424 | goto out; |
| 1425 | } |
| 1426 | |
| 1427 | unhash_session(ses); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1428 | spin_unlock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1429 | |
| 1430 | /* wait for callbacks */ |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 1431 | nfsd4_set_callback_client(ses->se_client, NULL); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1432 | nfsd4_put_session(ses); |
| 1433 | status = nfs_ok; |
| 1434 | out: |
| 1435 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1436 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | __be32 |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1440 | nfsd4_sequence(struct svc_rqst *rqstp, |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1441 | struct nfsd4_compound_state *cstate, |
| 1442 | struct nfsd4_sequence *seq) |
| 1443 | { |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1444 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1445 | struct nfsd4_session *session; |
| 1446 | struct nfsd4_slot *slot; |
| 1447 | int status; |
| 1448 | |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1449 | if (resp->opcnt != 1) |
| 1450 | return nfserr_sequence_pos; |
| 1451 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1452 | spin_lock(&client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1453 | status = nfserr_badsession; |
| 1454 | session = find_in_sessionid_hashtbl(&seq->sessionid); |
| 1455 | if (!session) |
| 1456 | goto out; |
| 1457 | |
| 1458 | status = nfserr_badslot; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 1459 | if (seq->slotid >= session->se_fchannel.maxreqs) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1460 | goto out; |
| 1461 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1462 | slot = session->se_slots[seq->slotid]; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1463 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
| 1464 | |
Andy Adamson | a8dfdae | 2009-08-28 08:45:02 -0400 | [diff] [blame] | 1465 | /* We do not negotiate the number of slots yet, so set the |
| 1466 | * maxslots to the session maxreqs which is used to encode |
| 1467 | * sr_highest_slotid and the sr_target_slot id to maxslots */ |
| 1468 | seq->maxslots = session->se_fchannel.maxreqs; |
| 1469 | |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1470 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1471 | if (status == nfserr_replay_cache) { |
| 1472 | cstate->slot = slot; |
| 1473 | cstate->session = session; |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1474 | /* Return the cached reply status and set cstate->status |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1475 | * for nfsd4_proc_compound processing */ |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1476 | status = nfsd4_replay_cache_entry(resp, seq); |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1477 | cstate->status = nfserr_replay_cache; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1478 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1479 | } |
| 1480 | if (status) |
| 1481 | goto out; |
| 1482 | |
| 1483 | /* Success! bump slot seqid */ |
| 1484 | slot->sl_inuse = true; |
| 1485 | slot->sl_seqid = seq->seqid; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1486 | slot->sl_cachethis = seq->cachethis; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1487 | |
| 1488 | cstate->slot = slot; |
| 1489 | cstate->session = session; |
| 1490 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1491 | out: |
J. Bruce Fields | 26c0c75 | 2010-04-24 15:35:43 -0400 | [diff] [blame] | 1492 | /* Hold a session reference until done processing the compound. */ |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1493 | if (cstate->session) { |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1494 | nfsd4_get_session(cstate->session); |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame^] | 1495 | atomic_inc(&session->se_client->cl_refcount); |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1496 | } |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1497 | spin_unlock(&client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1498 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
| 1499 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1500 | } |
| 1501 | |
| 1502 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1503 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1504 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1506 | struct sockaddr *sa = svc_addr(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | struct xdr_netobj clname = { |
| 1508 | .len = setclid->se_namelen, |
| 1509 | .data = setclid->se_name, |
| 1510 | }; |
| 1511 | nfs4_verifier clverifier = setclid->se_verf; |
| 1512 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1513 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1514 | __be32 status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1515 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | if (!check_name(clname)) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 1518 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1520 | status = nfs4_make_rec_clidname(dname, &clname); |
| 1521 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 1522 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | /* |
| 1525 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 1526 | * We get here on a DRC miss. |
| 1527 | */ |
| 1528 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1529 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | nfs4_lock_state(); |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1532 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1533 | if (conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1534 | /* RFC 3530 14.2.33 CASE 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | status = nfserr_clid_inuse; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 1536 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1537 | char addr_str[INET6_ADDRSTRLEN]; |
| 1538 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, |
| 1539 | sizeof(addr_str)); |
| 1540 | dprintk("NFSD: setclientid: string in use by client " |
| 1541 | "at %s\n", addr_str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | goto out; |
| 1543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1545 | /* |
| 1546 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") |
| 1547 | * has a description of SETCLIENTID request processing consisting |
| 1548 | * of 5 bullet points, labeled as CASE0 - CASE4 below. |
| 1549 | */ |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1550 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | status = nfserr_resource; |
| 1552 | if (!conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1553 | /* |
| 1554 | * RFC 3530 14.2.33 CASE 4: |
| 1555 | * placed first, because it is the normal case |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | */ |
| 1557 | if (unconf) |
| 1558 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1559 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1560 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | gen_clid(new); |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1563 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1565 | * RFC 3530 14.2.33 CASE 1: |
| 1566 | * probable callback update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 1568 | if (unconf) { |
| 1569 | /* Note this is removing unconfirmed {*x***}, |
| 1570 | * which is stronger than RFC recommended {vxc**}. |
| 1571 | * This has the advantage that there is at most |
| 1572 | * one {*x***} in either list at any time. |
| 1573 | */ |
| 1574 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | } |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1576 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1577 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | copy_clid(new, conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | } else if (!unconf) { |
| 1581 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1582 | * RFC 3530 14.2.33 CASE 2: |
| 1583 | * probable client reboot; state will be removed if |
| 1584 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1586 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1587 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | gen_clid(new); |
J. Bruce Fields | 49ba878 | 2007-11-19 19:09:50 -0500 | [diff] [blame] | 1590 | } else { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1591 | /* |
| 1592 | * RFC 3530 14.2.33 CASE 3: |
| 1593 | * probable client reboot; state will be removed if |
| 1594 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | */ |
| 1596 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1597 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1598 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | gen_clid(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | } |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 1602 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 1603 | add_to_unconfirmed(new, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1605 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 1606 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 1607 | status = nfs_ok; |
| 1608 | out: |
| 1609 | nfs4_unlock_state(); |
| 1610 | return status; |
| 1611 | } |
| 1612 | |
| 1613 | |
| 1614 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1615 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
| 1616 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 |
| 1617 | * bullets, labeled as CASE1 - CASE4 below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1619 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1620 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 1621 | struct nfsd4_compound_state *cstate, |
| 1622 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1624 | struct sockaddr *sa = svc_addr(rqstp); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1625 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 1627 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1628 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | if (STALE_CLIENTID(clid)) |
| 1631 | return nfserr_stale_clientid; |
| 1632 | /* |
| 1633 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 1634 | * We get here on a DRC miss. |
| 1635 | */ |
| 1636 | |
| 1637 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1638 | |
| 1639 | conf = find_confirmed_client(clid); |
| 1640 | unconf = find_unconfirmed_client(clid); |
| 1641 | |
| 1642 | status = nfserr_clid_inuse; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1643 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1644 | goto out; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1645 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1646 | goto out; |
| 1647 | |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1648 | /* |
| 1649 | * section 14.2.34 of RFC 3530 has a description of |
| 1650 | * SETCLIENTID_CONFIRM request processing consisting |
| 1651 | * of 4 bullet points, labeled as CASE1 - CASE4 below. |
| 1652 | */ |
J. Bruce Fields | 366e0c1 | 2007-11-20 15:54:10 -0500 | [diff] [blame] | 1653 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1654 | /* |
| 1655 | * RFC 3530 14.2.34 CASE 1: |
| 1656 | * callback update |
| 1657 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1658 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | status = nfserr_clid_inuse; |
| 1660 | else { |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 1661 | atomic_set(&conf->cl_cb_set, 0); |
J. Bruce Fields | 4b21d0d | 2010-03-07 23:39:01 -0500 | [diff] [blame] | 1662 | nfsd4_probe_callback(conf, &unconf->cl_cb_conn); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1663 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | } |
J. Bruce Fields | f3aba4e | 2007-11-20 16:52:07 -0500 | [diff] [blame] | 1667 | } else if (conf && !unconf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1668 | /* |
| 1669 | * RFC 3530 14.2.34 CASE 2: |
| 1670 | * probable retransmitted request; play it safe and |
| 1671 | * do nothing. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1672 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1673 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1675 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1677 | } else if (!conf && unconf |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1678 | && same_verf(&unconf->cl_confirm, &confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1679 | /* |
| 1680 | * RFC 3530 14.2.34 CASE 3: |
| 1681 | * Normal case; new or rebooted client: |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1682 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1683 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | status = nfserr_clid_inuse; |
| 1685 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1686 | unsigned int hash = |
| 1687 | clientstr_hashval(unconf->cl_recdir); |
| 1688 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1689 | hash, false); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1690 | if (conf) { |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1691 | nfsd4_remove_clid_dir(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1692 | expire_client(conf); |
| 1693 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1695 | conf = unconf; |
J. Bruce Fields | 4b21d0d | 2010-03-07 23:39:01 -0500 | [diff] [blame] | 1696 | nfsd4_probe_callback(conf, &conf->cl_cb_conn); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1697 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | } |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1699 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
| 1700 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1701 | &confirm)))) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1702 | /* |
| 1703 | * RFC 3530 14.2.34 CASE 4: |
| 1704 | * Client probably hasn't noticed that we rebooted yet. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1705 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1707 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 1708 | /* check that we have hit one of the cases...*/ |
| 1709 | status = nfserr_clid_inuse; |
| 1710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | nfs4_unlock_state(); |
| 1713 | return status; |
| 1714 | } |
| 1715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | /* OPEN Share state helper functions */ |
| 1717 | static inline struct nfs4_file * |
| 1718 | alloc_init_file(struct inode *ino) |
| 1719 | { |
| 1720 | struct nfs4_file *fp; |
| 1721 | unsigned int hashval = file_hashval(ino); |
| 1722 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1723 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 1724 | if (fp) { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1725 | atomic_set(&fp->fi_ref, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1727 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 1728 | INIT_LIST_HEAD(&fp->fi_delegations); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1729 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1731 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | fp->fi_inode = igrab(ino); |
| 1733 | fp->fi_id = current_fileid++; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1734 | fp->fi_had_conflict = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | return fp; |
| 1736 | } |
| 1737 | return NULL; |
| 1738 | } |
| 1739 | |
| 1740 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 1741 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1742 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1743 | if (*slab == NULL) |
| 1744 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1745 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1746 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1747 | } |
| 1748 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1749 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1750 | nfsd4_free_slabs(void) |
| 1751 | { |
| 1752 | nfsd4_free_slab(&stateowner_slab); |
| 1753 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1754 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1755 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1756 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | |
| 1758 | static int |
| 1759 | nfsd4_init_slabs(void) |
| 1760 | { |
| 1761 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1762 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1763 | if (stateowner_slab == NULL) |
| 1764 | goto out_nomem; |
| 1765 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1766 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1767 | if (file_slab == NULL) |
| 1768 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1769 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1770 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1771 | if (stateid_slab == NULL) |
| 1772 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1773 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1774 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1775 | if (deleg_slab == NULL) |
| 1776 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1778 | out_nomem: |
| 1779 | nfsd4_free_slabs(); |
| 1780 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1781 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | } |
| 1783 | |
| 1784 | void |
| 1785 | nfs4_free_stateowner(struct kref *kref) |
| 1786 | { |
| 1787 | struct nfs4_stateowner *sop = |
| 1788 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1789 | kfree(sop->so_owner.data); |
| 1790 | kmem_cache_free(stateowner_slab, sop); |
| 1791 | } |
| 1792 | |
| 1793 | static inline struct nfs4_stateowner * |
| 1794 | alloc_stateowner(struct xdr_netobj *owner) |
| 1795 | { |
| 1796 | struct nfs4_stateowner *sop; |
| 1797 | |
| 1798 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1799 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1800 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1801 | sop->so_owner.len = owner->len; |
| 1802 | kref_init(&sop->so_ref); |
| 1803 | return sop; |
| 1804 | } |
| 1805 | kmem_cache_free(stateowner_slab, sop); |
| 1806 | } |
| 1807 | return NULL; |
| 1808 | } |
| 1809 | |
| 1810 | static struct nfs4_stateowner * |
| 1811 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1812 | struct nfs4_stateowner *sop; |
| 1813 | struct nfs4_replay *rp; |
| 1814 | unsigned int idhashval; |
| 1815 | |
| 1816 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1817 | return NULL; |
| 1818 | idhashval = ownerid_hashval(current_ownerid); |
| 1819 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1820 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1821 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1822 | INIT_LIST_HEAD(&sop->so_stateids); |
| 1823 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1825 | sop->so_time = 0; |
| 1826 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1827 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1828 | list_add(&sop->so_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | sop->so_is_open_owner = 1; |
| 1830 | sop->so_id = current_ownerid++; |
| 1831 | sop->so_client = clp; |
| 1832 | sop->so_seqid = open->op_seqid; |
| 1833 | sop->so_confirmed = 0; |
| 1834 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 1835 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | rp->rp_buflen = 0; |
| 1837 | rp->rp_buf = rp->rp_ibuf; |
| 1838 | return sop; |
| 1839 | } |
| 1840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | static inline void |
| 1842 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1843 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1844 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1845 | |
| 1846 | INIT_LIST_HEAD(&stp->st_hash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1847 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 1848 | INIT_LIST_HEAD(&stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1850 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1851 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1852 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1854 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | stp->st_file = fp; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 1856 | stp->st_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1858 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1859 | stp->st_stateid.si_generation = 0; |
| 1860 | stp->st_access_bmap = 0; |
| 1861 | stp->st_deny_bmap = 0; |
Andy Adamson | 84459a1 | 2009-04-03 08:28:56 +0300 | [diff] [blame] | 1862 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
| 1863 | &stp->st_access_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 1865 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | } |
| 1867 | |
| 1868 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1870 | { |
| 1871 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1872 | |
NeilBrown | 358dd55 | 2006-04-10 22:55:42 -0700 | [diff] [blame] | 1873 | list_move_tail(&sop->so_close_lru, &close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | sop->so_time = get_seconds(); |
| 1875 | } |
| 1876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1878 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 1879 | clientid_t *clid) |
| 1880 | { |
| 1881 | return (sop->so_owner.len == owner->len) && |
| 1882 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1883 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | } |
| 1885 | |
| 1886 | static struct nfs4_stateowner * |
| 1887 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1888 | { |
| 1889 | struct nfs4_stateowner *so = NULL; |
| 1890 | |
| 1891 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1892 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | return so; |
| 1894 | } |
| 1895 | return NULL; |
| 1896 | } |
| 1897 | |
| 1898 | /* search file_hashtbl[] for file */ |
| 1899 | static struct nfs4_file * |
| 1900 | find_file(struct inode *ino) |
| 1901 | { |
| 1902 | unsigned int hashval = file_hashval(ino); |
| 1903 | struct nfs4_file *fp; |
| 1904 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1905 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1907 | if (fp->fi_inode == ino) { |
| 1908 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1909 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1911 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | } |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1913 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | return NULL; |
| 1915 | } |
| 1916 | |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1917 | static inline int access_valid(u32 x, u32 minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1918 | { |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1919 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1920 | return 0; |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1921 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
| 1922 | return 0; |
| 1923 | x &= ~NFS4_SHARE_ACCESS_MASK; |
| 1924 | if (minorversion && x) { |
| 1925 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) |
| 1926 | return 0; |
| 1927 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) |
| 1928 | return 0; |
| 1929 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); |
| 1930 | } |
| 1931 | if (x) |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1932 | return 0; |
| 1933 | return 1; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1934 | } |
| 1935 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1936 | static inline int deny_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1937 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1938 | /* Note: unlike access bits, deny bits may be zero. */ |
| 1939 | return x <= NFS4_SHARE_DENY_BOTH; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1940 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 1942 | /* |
| 1943 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 1944 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 1945 | * only what share bits are currently in force, but also what |
| 1946 | * combinations of share bits previous opens have used. This allows us |
| 1947 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 1948 | * return an error if the client attempt to downgrade to a combination |
| 1949 | * of share bits not explicable by closing some of its previous opens. |
| 1950 | * |
| 1951 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 1952 | * track of access/deny bit combinations; so, e.g., we allow: |
| 1953 | * |
| 1954 | * OPEN allow read, deny write |
| 1955 | * OPEN allow both, deny none |
| 1956 | * DOWNGRADE allow read, deny none |
| 1957 | * |
| 1958 | * which we should reject. |
| 1959 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1960 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | set_access(unsigned int *access, unsigned long bmap) { |
| 1962 | int i; |
| 1963 | |
| 1964 | *access = 0; |
| 1965 | for (i = 1; i < 4; i++) { |
| 1966 | if (test_bit(i, &bmap)) |
| 1967 | *access |= i; |
| 1968 | } |
| 1969 | } |
| 1970 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1971 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1973 | int i; |
| 1974 | |
| 1975 | *deny = 0; |
| 1976 | for (i = 0; i < 4; i++) { |
| 1977 | if (test_bit(i, &bmap)) |
| 1978 | *deny |= i ; |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | static int |
| 1983 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1984 | unsigned int access, deny; |
| 1985 | |
| 1986 | set_access(&access, stp->st_access_bmap); |
| 1987 | set_deny(&deny, stp->st_deny_bmap); |
| 1988 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1989 | return 0; |
| 1990 | return 1; |
| 1991 | } |
| 1992 | |
| 1993 | /* |
| 1994 | * Called to check deny when READ with all zero stateid or |
| 1995 | * WRITE with all zero or all one stateid |
| 1996 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1997 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1999 | { |
| 2000 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2001 | struct nfs4_file *fp; |
| 2002 | struct nfs4_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2003 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | |
| 2005 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 2006 | |
| 2007 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2008 | if (!fp) |
| 2009 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 2010 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2012 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 2013 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 2014 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 2015 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2017 | ret = nfs_ok; |
| 2018 | out: |
| 2019 | put_nfs4_file(fp); |
| 2020 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | } |
| 2022 | |
| 2023 | static inline void |
| 2024 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 2025 | { |
| 2026 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 2027 | drop_file_write_access(filp); |
Wu Fengguang | 42e4960 | 2010-03-05 13:42:01 -0800 | [diff] [blame] | 2028 | spin_lock(&filp->f_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
Wu Fengguang | 42e4960 | 2010-03-05 13:42:01 -0800 | [diff] [blame] | 2030 | spin_unlock(&filp->f_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | } |
| 2032 | } |
| 2033 | |
| 2034 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2035 | * Spawn a thread to perform a recall on the delegation represented |
| 2036 | * by the lease (file_lock) |
| 2037 | * |
| 2038 | * Called from break_lease() with lock_kernel() held. |
| 2039 | * Note: we assume break_lease will only call this *once* for any given |
| 2040 | * lease. |
| 2041 | */ |
| 2042 | static |
| 2043 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 2044 | { |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 2045 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | |
| 2047 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 2048 | if (!dp) |
| 2049 | return; |
| 2050 | |
| 2051 | /* We're assuming the state code never drops its reference |
| 2052 | * without first removing the lease. Since we're in this lease |
| 2053 | * callback (and since the lease code is serialized by the kernel |
| 2054 | * lock) we know the server hasn't removed the lease yet, we know |
| 2055 | * it's safe to take a reference: */ |
| 2056 | atomic_inc(&dp->dl_count); |
| 2057 | |
| 2058 | spin_lock(&recall_lock); |
| 2059 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 2060 | spin_unlock(&recall_lock); |
| 2061 | |
| 2062 | /* only place dl_time is set. protected by lock_kernel*/ |
| 2063 | dp->dl_time = get_seconds(); |
| 2064 | |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2065 | /* |
| 2066 | * We don't want the locks code to timeout the lease for us; |
| 2067 | * we'll remove it ourself if the delegation isn't returned |
| 2068 | * in time. |
| 2069 | */ |
| 2070 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 2072 | dp->dl_file->fi_had_conflict = true; |
| 2073 | nfsd4_cb_recall(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | } |
| 2075 | |
| 2076 | /* |
| 2077 | * The file_lock is being reapd. |
| 2078 | * |
| 2079 | * Called by locks_free_lock() with lock_kernel() held. |
| 2080 | */ |
| 2081 | static |
| 2082 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 2083 | { |
| 2084 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 2085 | |
| 2086 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 2087 | |
| 2088 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 2089 | return; |
| 2090 | dp->dl_flock = NULL; |
| 2091 | } |
| 2092 | |
| 2093 | /* |
| 2094 | * Set the delegation file_lock back pointer. |
| 2095 | * |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2096 | * Called from setlease() with lock_kernel() held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | */ |
| 2098 | static |
| 2099 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 2100 | { |
| 2101 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 2102 | |
| 2103 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 2104 | if (!dp) |
| 2105 | return; |
| 2106 | dp->dl_flock = new; |
| 2107 | } |
| 2108 | |
| 2109 | /* |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2110 | * Called from setlease() with lock_kernel() held |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | */ |
| 2112 | static |
| 2113 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 2114 | { |
| 2115 | struct nfs4_delegation *onlistd = |
| 2116 | (struct nfs4_delegation *)onlist->fl_owner; |
| 2117 | struct nfs4_delegation *tryd = |
| 2118 | (struct nfs4_delegation *)try->fl_owner; |
| 2119 | |
| 2120 | if (onlist->fl_lmops != try->fl_lmops) |
| 2121 | return 0; |
| 2122 | |
| 2123 | return onlistd->dl_client == tryd->dl_client; |
| 2124 | } |
| 2125 | |
| 2126 | |
| 2127 | static |
| 2128 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 2129 | { |
| 2130 | if (arg & F_UNLCK) |
| 2131 | return lease_modify(onlist, arg); |
| 2132 | else |
| 2133 | return -EAGAIN; |
| 2134 | } |
| 2135 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 2136 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | .fl_break = nfsd_break_deleg_cb, |
| 2138 | .fl_release_private = nfsd_release_deleg_cb, |
| 2139 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 2140 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 2141 | .fl_change = nfsd_change_deleg_cb, |
| 2142 | }; |
| 2143 | |
| 2144 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2145 | __be32 |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2146 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
| 2147 | struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | clientid_t *clientid = &open->op_clientid; |
| 2150 | struct nfs4_client *clp = NULL; |
| 2151 | unsigned int strhashval; |
| 2152 | struct nfs4_stateowner *sop = NULL; |
| 2153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | if (!check_name(open->op_owner)) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2155 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | |
| 2157 | if (STALE_CLIENTID(&open->op_clientid)) |
| 2158 | return nfserr_stale_clientid; |
| 2159 | |
| 2160 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 2161 | sop = find_openstateowner_str(strhashval, open); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2162 | open->op_stateowner = sop; |
| 2163 | if (!sop) { |
| 2164 | /* Make sure the client's lease hasn't expired. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | clp = find_confirmed_client(clientid); |
| 2166 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2167 | return nfserr_expired; |
| 2168 | goto renew; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2170 | /* When sessions are used, skip open sequenceid processing */ |
| 2171 | if (nfsd4_has_session(cstate)) |
| 2172 | goto renew; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2173 | if (!sop->so_confirmed) { |
| 2174 | /* Replace unconfirmed owners without checking for replay. */ |
| 2175 | clp = sop->so_client; |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2176 | release_openowner(sop); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2177 | open->op_stateowner = NULL; |
| 2178 | goto renew; |
| 2179 | } |
| 2180 | if (open->op_seqid == sop->so_seqid - 1) { |
| 2181 | if (sop->so_replay.rp_buflen) |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 2182 | return nfserr_replay_me; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2183 | /* The original OPEN failed so spectacularly |
| 2184 | * that we don't even have replay data saved! |
| 2185 | * Therefore, we have no choice but to continue |
| 2186 | * processing this OPEN; presumably, we'll |
| 2187 | * fail again for the same reason. |
| 2188 | */ |
| 2189 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); |
| 2190 | goto renew; |
| 2191 | } |
| 2192 | if (open->op_seqid != sop->so_seqid) |
| 2193 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | renew: |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2195 | if (open->op_stateowner == NULL) { |
| 2196 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 2197 | if (sop == NULL) |
| 2198 | return nfserr_resource; |
| 2199 | open->op_stateowner = sop; |
| 2200 | } |
| 2201 | list_del_init(&sop->so_close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | renew_client(sop->so_client); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2203 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | } |
| 2205 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2206 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 2207 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 2208 | { |
| 2209 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 2210 | return nfserr_openmode; |
| 2211 | else |
| 2212 | return nfs_ok; |
| 2213 | } |
| 2214 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 2215 | static struct nfs4_delegation * |
| 2216 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 2217 | { |
| 2218 | struct nfs4_delegation *dp; |
| 2219 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2220 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 2221 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 2222 | return dp; |
| 2223 | } |
| 2224 | return NULL; |
| 2225 | } |
| 2226 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2227 | static __be32 |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2228 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 2229 | struct nfs4_delegation **dp) |
| 2230 | { |
| 2231 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2232 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2233 | |
| 2234 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 2235 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2236 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2237 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 2238 | RD_STATE : WR_STATE; |
| 2239 | status = nfs4_check_delegmode(*dp, flags); |
| 2240 | if (status) |
| 2241 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2242 | out: |
| 2243 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 2244 | return nfs_ok; |
| 2245 | if (status) |
| 2246 | return status; |
| 2247 | open->op_stateowner->so_confirmed = 1; |
| 2248 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2249 | } |
| 2250 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2251 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 2253 | { |
| 2254 | struct nfs4_stateid *local; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2255 | __be32 status = nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 2257 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2258 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | /* ignore lock owners */ |
| 2260 | if (local->st_stateowner->so_is_open_owner == 0) |
| 2261 | continue; |
| 2262 | /* remember if we have seen this open owner */ |
| 2263 | if (local->st_stateowner == sop) |
| 2264 | *stpp = local; |
| 2265 | /* check for conflicting share reservations */ |
| 2266 | if (!test_share(local, open)) |
| 2267 | goto out; |
| 2268 | } |
| 2269 | status = 0; |
| 2270 | out: |
| 2271 | return status; |
| 2272 | } |
| 2273 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2274 | static inline struct nfs4_stateid * |
| 2275 | nfs4_alloc_stateid(void) |
| 2276 | { |
| 2277 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 2278 | } |
| 2279 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2280 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2282 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | struct svc_fh *cur_fh, int flags) |
| 2284 | { |
| 2285 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2287 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | if (stp == NULL) |
| 2289 | return nfserr_resource; |
| 2290 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2291 | if (dp) { |
| 2292 | get_file(dp->dl_vfs_file); |
| 2293 | stp->st_vfs_file = dp->dl_vfs_file; |
| 2294 | } else { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2295 | __be32 status; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2296 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 2297 | &stp->st_vfs_file); |
| 2298 | if (status) { |
| 2299 | if (status == nfserr_dropit) |
| 2300 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2301 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2302 | return status; |
| 2303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | *stpp = stp; |
| 2306 | return 0; |
| 2307 | } |
| 2308 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2309 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 2311 | struct nfsd4_open *open) |
| 2312 | { |
| 2313 | struct iattr iattr = { |
| 2314 | .ia_valid = ATTR_SIZE, |
| 2315 | .ia_size = 0, |
| 2316 | }; |
| 2317 | if (!open->op_truncate) |
| 2318 | return 0; |
| 2319 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 2320 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 2322 | } |
| 2323 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2324 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 2326 | { |
| 2327 | struct file *filp = stp->st_vfs_file; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 2328 | struct inode *inode = filp->f_path.dentry->d_inode; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2329 | unsigned int share_access, new_writer; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2330 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | |
| 2332 | set_access(&share_access, stp->st_access_bmap); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2333 | new_writer = (~share_access) & open->op_share_access |
| 2334 | & NFS4_SHARE_ACCESS_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2335 | |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2336 | if (new_writer) { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2337 | int err = get_write_access(inode); |
| 2338 | if (err) |
| 2339 | return nfserrno(err); |
Benny Halevy | e518f05 | 2008-07-04 15:38:41 +0300 | [diff] [blame] | 2340 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
| 2341 | if (err) |
| 2342 | return nfserrno(err); |
| 2343 | file_take_write(filp); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 2346 | if (status) { |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2347 | if (new_writer) |
| 2348 | put_write_access(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | return status; |
| 2350 | } |
| 2351 | /* remember the open */ |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2352 | filp->f_mode |= open->op_share_access; |
J. Bruce Fields | b55e0ba | 2008-04-28 18:22:50 -0400 | [diff] [blame] | 2353 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 2354 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | |
| 2356 | return nfs_ok; |
| 2357 | } |
| 2358 | |
| 2359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | static void |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2361 | nfs4_set_claim_prev(struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | { |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2363 | open->op_stateowner->so_confirmed = 1; |
| 2364 | open->op_stateowner->so_client->cl_firststate = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | } |
| 2366 | |
| 2367 | /* |
| 2368 | * Attempt to hand out a delegation. |
| 2369 | */ |
| 2370 | static void |
| 2371 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 2372 | { |
| 2373 | struct nfs4_delegation *dp; |
| 2374 | struct nfs4_stateowner *sop = stp->st_stateowner; |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2375 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | struct file_lock fl, *flp = &fl; |
| 2377 | int status, flag = 0; |
| 2378 | |
| 2379 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2380 | open->op_recall = 0; |
| 2381 | switch (open->op_claim_type) { |
| 2382 | case NFS4_OPEN_CLAIM_PREVIOUS: |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2383 | if (!cb_up) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2384 | open->op_recall = 1; |
| 2385 | flag = open->op_delegate_type; |
| 2386 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 2387 | goto out; |
| 2388 | break; |
| 2389 | case NFS4_OPEN_CLAIM_NULL: |
| 2390 | /* Let's not give out any delegations till everyone's |
| 2391 | * had the chance to reclaim theirs.... */ |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2392 | if (locks_in_grace()) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2393 | goto out; |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2394 | if (!cb_up || !sop->so_confirmed) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2395 | goto out; |
| 2396 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 2397 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 2398 | else |
| 2399 | flag = NFS4_OPEN_DELEGATE_READ; |
| 2400 | break; |
| 2401 | default: |
| 2402 | goto out; |
| 2403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | |
| 2405 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 2406 | if (dp == NULL) { |
| 2407 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2408 | goto out; |
| 2409 | } |
| 2410 | locks_init_lock(&fl); |
| 2411 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 2412 | fl.fl_flags = FL_LEASE; |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 2413 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | fl.fl_end = OFFSET_MAX; |
| 2415 | fl.fl_owner = (fl_owner_t)dp; |
| 2416 | fl.fl_file = stp->st_vfs_file; |
| 2417 | fl.fl_pid = current->tgid; |
| 2418 | |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2419 | /* vfs_setlease checks to see if delegation should be handed out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 2421 | */ |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 2422 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 2424 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2426 | goto out; |
| 2427 | } |
| 2428 | |
| 2429 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 2430 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2431 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
| 2432 | STATEID_VAL(&dp->dl_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2434 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 2435 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 2436 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2437 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | open->op_delegate_type = flag; |
| 2439 | } |
| 2440 | |
| 2441 | /* |
| 2442 | * called with nfs4_lock_state() held. |
| 2443 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2444 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 2446 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2447 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | struct nfs4_file *fp = NULL; |
| 2449 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2450 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2451 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2452 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | |
| 2454 | status = nfserr_inval; |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 2455 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 2456 | || !deny_valid(open->op_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | goto out; |
| 2458 | /* |
| 2459 | * Lookup file; if found, lookup stateid and check open request, |
| 2460 | * and check for delegations in the process of being recalled. |
| 2461 | * If not found, create the nfs4_file struct |
| 2462 | */ |
| 2463 | fp = find_file(ino); |
| 2464 | if (fp) { |
| 2465 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 2466 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2467 | status = nfs4_check_deleg(fp, open, &dp); |
| 2468 | if (status) |
| 2469 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2471 | status = nfserr_bad_stateid; |
| 2472 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 2473 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | status = nfserr_resource; |
| 2475 | fp = alloc_init_file(ino); |
| 2476 | if (fp == NULL) |
| 2477 | goto out; |
| 2478 | } |
| 2479 | |
| 2480 | /* |
| 2481 | * OPEN the file, or upgrade an existing OPEN. |
| 2482 | * If truncate fails, the OPEN fails. |
| 2483 | */ |
| 2484 | if (stp) { |
| 2485 | /* Stateid was found, this is an OPEN upgrade */ |
| 2486 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 2487 | if (status) |
| 2488 | goto out; |
NeilBrown | 444c2c0 | 2005-07-07 17:59:22 -0700 | [diff] [blame] | 2489 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | } else { |
| 2491 | /* Stateid was not found, this is a new OPEN */ |
| 2492 | int flags = 0; |
J. Bruce Fields | 9ecb6a0 | 2006-06-30 01:56:17 -0700 | [diff] [blame] | 2493 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2494 | flags |= NFSD_MAY_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2496 | flags |= NFSD_MAY_WRITE; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2497 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 2498 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | goto out; |
| 2500 | init_stateid(stp, fp, open); |
| 2501 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 2502 | if (status) { |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 2503 | release_open_stateid(stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | goto out; |
| 2505 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2506 | if (nfsd4_has_session(&resp->cstate)) |
| 2507 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | } |
| 2509 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2510 | |
Ricardo Labiaga | 8b8aae4 | 2009-12-11 19:10:48 -0800 | [diff] [blame] | 2511 | if (nfsd4_has_session(&resp->cstate)) { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2512 | open->op_stateowner->so_confirmed = 1; |
Ricardo Labiaga | 8b8aae4 | 2009-12-11 19:10:48 -0800 | [diff] [blame] | 2513 | nfsd4_create_clid_dir(open->op_stateowner->so_client); |
| 2514 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | /* |
| 2517 | * Attempt to hand out a delegation. No error return, because the |
| 2518 | * OPEN succeeds even if we fail. |
| 2519 | */ |
| 2520 | nfs4_open_delegation(current_fh, open, stp); |
| 2521 | |
| 2522 | status = nfs_ok; |
| 2523 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2524 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
| 2525 | STATEID_VAL(&stp->st_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2527 | if (fp) |
| 2528 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2529 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 2530 | nfs4_set_claim_prev(open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | /* |
| 2532 | * To finish the open response, we just need to set the rflags. |
| 2533 | */ |
| 2534 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2535 | if (!open->op_stateowner->so_confirmed && |
| 2536 | !nfsd4_has_session(&resp->cstate)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 2538 | |
| 2539 | return status; |
| 2540 | } |
| 2541 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2542 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2543 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2544 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | { |
| 2546 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2547 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | |
| 2549 | nfs4_lock_state(); |
| 2550 | dprintk("process_renew(%08x/%08x): starting\n", |
| 2551 | clid->cl_boot, clid->cl_id); |
| 2552 | status = nfserr_stale_clientid; |
| 2553 | if (STALE_CLIENTID(clid)) |
| 2554 | goto out; |
| 2555 | clp = find_confirmed_client(clid); |
| 2556 | status = nfserr_expired; |
| 2557 | if (clp == NULL) { |
| 2558 | /* We assume the client took too long to RENEW. */ |
| 2559 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 2560 | goto out; |
| 2561 | } |
| 2562 | renew_client(clp); |
| 2563 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2564 | if (!list_empty(&clp->cl_delegations) |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2565 | && !atomic_read(&clp->cl_cb_set)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | goto out; |
| 2567 | status = nfs_ok; |
| 2568 | out: |
| 2569 | nfs4_unlock_state(); |
| 2570 | return status; |
| 2571 | } |
| 2572 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2573 | struct lock_manager nfsd4_manager = { |
| 2574 | }; |
| 2575 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2576 | static void |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2577 | nfsd4_end_grace(void) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2578 | { |
| 2579 | dprintk("NFSD: end of grace period\n"); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2580 | nfsd4_recdir_purge_old(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2581 | locks_end_grace(&nfsd4_manager); |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 2582 | /* |
| 2583 | * Now that every NFSv4 client has had the chance to recover and |
| 2584 | * to see the (possibly new, possibly shorter) lease time, we |
| 2585 | * can safely set the next grace time to the current lease time: |
| 2586 | */ |
| 2587 | nfsd4_grace = nfsd4_lease; |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2588 | } |
| 2589 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2590 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | nfs4_laundromat(void) |
| 2592 | { |
| 2593 | struct nfs4_client *clp; |
| 2594 | struct nfs4_stateowner *sop; |
| 2595 | struct nfs4_delegation *dp; |
| 2596 | struct list_head *pos, *next, reaplist; |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 2597 | time_t cutoff = get_seconds() - nfsd4_lease; |
| 2598 | time_t t, clientid_val = nfsd4_lease; |
| 2599 | time_t u, test_val = nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2600 | |
| 2601 | nfs4_lock_state(); |
| 2602 | |
| 2603 | dprintk("NFSD: laundromat service - starting\n"); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2604 | if (locks_in_grace()) |
| 2605 | nfsd4_end_grace(); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 2606 | INIT_LIST_HEAD(&reaplist); |
| 2607 | spin_lock(&client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | list_for_each_safe(pos, next, &client_lru) { |
| 2609 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 2610 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 2611 | t = clp->cl_time - cutoff; |
| 2612 | if (clientid_val > t) |
| 2613 | clientid_val = t; |
| 2614 | break; |
| 2615 | } |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame^] | 2616 | if (atomic_read(&clp->cl_refcount)) { |
| 2617 | dprintk("NFSD: client in use (clientid %08x)\n", |
| 2618 | clp->cl_clientid.cl_id); |
| 2619 | continue; |
| 2620 | } |
| 2621 | unhash_client_locked(clp); |
| 2622 | list_add(&clp->cl_lru, &reaplist); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 2623 | } |
| 2624 | spin_unlock(&client_lock); |
| 2625 | list_for_each_safe(pos, next, &reaplist) { |
| 2626 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 2628 | clp->cl_clientid.cl_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2629 | nfsd4_remove_clid_dir(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | expire_client(clp); |
| 2631 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | spin_lock(&recall_lock); |
| 2633 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 2634 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 2635 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 2636 | u = dp->dl_time - cutoff; |
| 2637 | if (test_val > u) |
| 2638 | test_val = u; |
| 2639 | break; |
| 2640 | } |
| 2641 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 2642 | dp, dp->dl_flock); |
| 2643 | list_move(&dp->dl_recall_lru, &reaplist); |
| 2644 | } |
| 2645 | spin_unlock(&recall_lock); |
| 2646 | list_for_each_safe(pos, next, &reaplist) { |
| 2647 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 2648 | list_del_init(&dp->dl_recall_lru); |
| 2649 | unhash_delegation(dp); |
| 2650 | } |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 2651 | test_val = nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | list_for_each_safe(pos, next, &close_lru) { |
| 2653 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 2654 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 2655 | u = sop->so_time - cutoff; |
| 2656 | if (test_val > u) |
| 2657 | test_val = u; |
| 2658 | break; |
| 2659 | } |
| 2660 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 2661 | sop->so_id); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2662 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | } |
| 2664 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 2665 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 2666 | nfs4_unlock_state(); |
| 2667 | return clientid_val; |
| 2668 | } |
| 2669 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 2670 | static struct workqueue_struct *laundry_wq; |
| 2671 | static void laundromat_main(struct work_struct *); |
| 2672 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); |
| 2673 | |
| 2674 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2675 | laundromat_main(struct work_struct *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | { |
| 2677 | time_t t; |
| 2678 | |
| 2679 | t = nfs4_laundromat(); |
| 2680 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 2681 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | } |
| 2683 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2684 | static struct nfs4_stateowner * |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2685 | search_close_lru(u32 st_id, int flags) |
| 2686 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | struct nfs4_stateowner *local = NULL; |
| 2688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | if (flags & CLOSE_STATE) { |
| 2690 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 2691 | if (local->so_id == st_id) |
| 2692 | return local; |
| 2693 | } |
| 2694 | } |
| 2695 | return NULL; |
| 2696 | } |
| 2697 | |
| 2698 | static inline int |
| 2699 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 2700 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 2701 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | } |
| 2703 | |
| 2704 | static int |
| 2705 | STALE_STATEID(stateid_t *stateid) |
| 2706 | { |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2707 | if (time_after((unsigned long)boot_time, |
| 2708 | (unsigned long)stateid->si_boot)) { |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2709 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
| 2710 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2711 | return 1; |
| 2712 | } |
| 2713 | return 0; |
| 2714 | } |
| 2715 | |
| 2716 | static int |
| 2717 | EXPIRED_STATEID(stateid_t *stateid) |
| 2718 | { |
| 2719 | if (time_before((unsigned long)boot_time, |
| 2720 | ((unsigned long)stateid->si_boot)) && |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 2721 | time_before((unsigned long)(stateid->si_boot + nfsd4_lease), get_seconds())) { |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2722 | dprintk("NFSD: expired stateid " STATEID_FMT "!\n", |
| 2723 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2724 | return 1; |
| 2725 | } |
| 2726 | return 0; |
| 2727 | } |
| 2728 | |
| 2729 | static __be32 |
| 2730 | stateid_error_map(stateid_t *stateid) |
| 2731 | { |
| 2732 | if (STALE_STATEID(stateid)) |
| 2733 | return nfserr_stale_stateid; |
| 2734 | if (EXPIRED_STATEID(stateid)) |
| 2735 | return nfserr_expired; |
| 2736 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2737 | dprintk("NFSD: bad stateid " STATEID_FMT "!\n", |
| 2738 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2739 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | } |
| 2741 | |
| 2742 | static inline int |
| 2743 | access_permit_read(unsigned long access_bmap) |
| 2744 | { |
| 2745 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 2746 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 2747 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 2748 | } |
| 2749 | |
| 2750 | static inline int |
| 2751 | access_permit_write(unsigned long access_bmap) |
| 2752 | { |
| 2753 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 2754 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 2755 | } |
| 2756 | |
| 2757 | static |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2758 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2760 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | |
| 2762 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 2763 | goto out; |
| 2764 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 2765 | goto out; |
| 2766 | status = nfs_ok; |
| 2767 | out: |
| 2768 | return status; |
| 2769 | } |
| 2770 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2771 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2773 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2774 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2775 | return nfs_ok; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2776 | else if (locks_in_grace()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | /* Answer in remaining cases depends on existance of |
| 2778 | * conflicting state; so we must wait out the grace period. */ |
| 2779 | return nfserr_grace; |
| 2780 | } else if (flags & WR_STATE) |
| 2781 | return nfs4_share_conflict(current_fh, |
| 2782 | NFS4_SHARE_DENY_WRITE); |
| 2783 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2784 | return nfs4_share_conflict(current_fh, |
| 2785 | NFS4_SHARE_DENY_READ); |
| 2786 | } |
| 2787 | |
| 2788 | /* |
| 2789 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2790 | * that are not able to provide mandatory locking. |
| 2791 | */ |
| 2792 | static inline int |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2793 | grace_disallows_io(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2795 | return locks_in_grace() && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | } |
| 2797 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2798 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2799 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2800 | /* |
| 2801 | * When sessions are used the stateid generation number is ignored |
| 2802 | * when it is zero. |
| 2803 | */ |
| 2804 | if ((flags & HAS_SESSION) && in->si_generation == 0) |
| 2805 | goto out; |
| 2806 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2807 | /* If the client sends us a stateid from the future, it's buggy: */ |
| 2808 | if (in->si_generation > ref->si_generation) |
| 2809 | return nfserr_bad_stateid; |
| 2810 | /* |
| 2811 | * The following, however, can happen. For example, if the |
| 2812 | * client sends an open and some IO at the same time, the open |
| 2813 | * may bump si_generation while the IO is still in flight. |
| 2814 | * Thanks to hard links and renames, the client never knows what |
| 2815 | * file an open will affect. So it could avoid that situation |
| 2816 | * only by serializing all opens and IO from the same open |
| 2817 | * owner. To recover from the old_stateid error, the client |
| 2818 | * will just have to retry the IO: |
| 2819 | */ |
| 2820 | if (in->si_generation < ref->si_generation) |
| 2821 | return nfserr_old_stateid; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2822 | out: |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2823 | return nfs_ok; |
| 2824 | } |
| 2825 | |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2826 | static int is_delegation_stateid(stateid_t *stateid) |
| 2827 | { |
| 2828 | return stateid->si_fileid == 0; |
| 2829 | } |
| 2830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | /* |
| 2832 | * Checks for stateid operations |
| 2833 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2834 | __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2835 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
| 2836 | stateid_t *stateid, int flags, struct file **filpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | { |
| 2838 | struct nfs4_stateid *stp = NULL; |
| 2839 | struct nfs4_delegation *dp = NULL; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2840 | struct svc_fh *current_fh = &cstate->current_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2842 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2843 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | if (filpp) |
| 2845 | *filpp = NULL; |
| 2846 | |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2847 | if (grace_disallows_io(ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | return nfserr_grace; |
| 2849 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2850 | if (nfsd4_has_session(cstate)) |
| 2851 | flags |= HAS_SESSION; |
| 2852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2854 | return check_special_stateids(current_fh, stateid, flags); |
| 2855 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | status = nfserr_stale_stateid; |
| 2857 | if (STALE_STATEID(stateid)) |
| 2858 | goto out; |
| 2859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | status = nfserr_bad_stateid; |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2861 | if (is_delegation_stateid(stateid)) { |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2862 | dp = find_delegation_stateid(ino, stateid); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2863 | if (!dp) { |
| 2864 | status = stateid_error_map(stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2866 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2867 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
| 2868 | flags); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2869 | if (status) |
| 2870 | goto out; |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2871 | status = nfs4_check_delegmode(dp, flags); |
| 2872 | if (status) |
| 2873 | goto out; |
| 2874 | renew_client(dp->dl_client); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2875 | if (filpp) |
| 2876 | *filpp = dp->dl_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | } else { /* open or lock stateid */ |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2878 | stp = find_stateid(stateid, flags); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2879 | if (!stp) { |
| 2880 | status = stateid_error_map(stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2882 | } |
J. Bruce Fields | 6150ef0 | 2009-02-21 13:36:16 -0800 | [diff] [blame] | 2883 | if (nfs4_check_fh(current_fh, stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | goto out; |
| 2885 | if (!stp->st_stateowner->so_confirmed) |
| 2886 | goto out; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2887 | status = check_stateid_generation(stateid, &stp->st_stateid, |
| 2888 | flags); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2889 | if (status) |
| 2890 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2891 | status = nfs4_check_openmode(stp, flags); |
| 2892 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | goto out; |
| 2894 | renew_client(stp->st_stateowner->so_client); |
| 2895 | if (filpp) |
| 2896 | *filpp = stp->st_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | } |
| 2898 | status = nfs_ok; |
| 2899 | out: |
| 2900 | return status; |
| 2901 | } |
| 2902 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2903 | static inline int |
| 2904 | setlkflg (int type) |
| 2905 | { |
| 2906 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 2907 | RD_STATE : WR_STATE; |
| 2908 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | |
| 2910 | /* |
| 2911 | * Checks for sequence id mutating operations. |
| 2912 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2913 | static __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2914 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
| 2915 | stateid_t *stateid, int flags, |
| 2916 | struct nfs4_stateowner **sopp, |
| 2917 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2918 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | struct nfs4_stateid *stp; |
| 2920 | struct nfs4_stateowner *sop; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2921 | struct svc_fh *current_fh = &cstate->current_fh; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2922 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2923 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2924 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
| 2925 | seqid, STATEID_VAL(stateid)); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | *stpp = NULL; |
| 2928 | *sopp = NULL; |
| 2929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2931 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2932 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | } |
| 2934 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | if (STALE_STATEID(stateid)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2936 | return nfserr_stale_stateid; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2937 | |
| 2938 | if (nfsd4_has_session(cstate)) |
| 2939 | flags |= HAS_SESSION; |
| 2940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | /* |
| 2942 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2943 | * the confirmed flag is incorrecly set, or the generation |
| 2944 | * number is incorrect. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | */ |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2946 | stp = find_stateid(stateid, flags); |
| 2947 | if (stp == NULL) { |
| 2948 | /* |
| 2949 | * Also, we should make sure this isn't just the result of |
| 2950 | * a replayed close: |
| 2951 | */ |
| 2952 | sop = search_close_lru(stateid->si_stateownerid, flags); |
| 2953 | if (sop == NULL) |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2954 | return stateid_error_map(stateid); |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2955 | *sopp = sop; |
| 2956 | goto check_replay; |
| 2957 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2958 | |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 2959 | *stpp = stp; |
| 2960 | *sopp = sop = stp->st_stateowner; |
| 2961 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2962 | if (lock) { |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2963 | clientid_t *lockclid = &lock->v.new.clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | struct nfs4_client *clp = sop->so_client; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2965 | int lkflg = 0; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2966 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2968 | lkflg = setlkflg(lock->lk_type); |
| 2969 | |
| 2970 | if (lock->lk_is_new) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2971 | if (!sop->so_is_open_owner) |
| 2972 | return nfserr_bad_stateid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 2973 | if (!(flags & HAS_SESSION) && |
| 2974 | !same_clid(&clp->cl_clientid, lockclid)) |
| 2975 | return nfserr_bad_stateid; |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2976 | /* stp is the open stateid */ |
| 2977 | status = nfs4_check_openmode(stp, lkflg); |
| 2978 | if (status) |
| 2979 | return status; |
| 2980 | } else { |
| 2981 | /* stp is the lock stateid */ |
| 2982 | status = nfs4_check_openmode(stp->st_openstp, lkflg); |
| 2983 | if (status) |
| 2984 | return status; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2985 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | } |
| 2987 | |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2988 | if (nfs4_check_fh(current_fh, stp)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2989 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2990 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | } |
| 2992 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2993 | /* |
| 2994 | * We now validate the seqid and stateid generation numbers. |
| 2995 | * For the moment, we ignore the possibility of |
| 2996 | * generation number wraparound. |
| 2997 | */ |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2998 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2999 | goto check_replay; |
| 3000 | |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3001 | if (sop->so_confirmed && flags & CONFIRM) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 3002 | dprintk("NFSD: preprocess_seqid_op: expected" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3003 | " unconfirmed stateowner!\n"); |
| 3004 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3005 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3006 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 3007 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3008 | " confirmed yet!\n"); |
| 3009 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3010 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3011 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3012 | if (status) |
| 3013 | return status; |
NeilBrown | 52fd004 | 2005-07-07 17:59:24 -0700 | [diff] [blame] | 3014 | renew_client(sop->so_client); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3015 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3016 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | check_replay: |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 3018 | if (seqid == sop->so_seqid - 1) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3019 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3020 | /* indicate replay to calling function */ |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 3021 | return nfserr_replay_me; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | } |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 3023 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3024 | sop->so_seqid, seqid); |
| 3025 | *sopp = NULL; |
| 3026 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | } |
| 3028 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3029 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3030 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3031 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3033 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | struct nfs4_stateowner *sop; |
| 3035 | struct nfs4_stateid *stp; |
| 3036 | |
| 3037 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3038 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3039 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3041 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 3042 | if (status) |
| 3043 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3044 | |
| 3045 | nfs4_lock_state(); |
| 3046 | |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3047 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3048 | oc->oc_seqid, &oc->oc_req_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3049 | CONFIRM | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3050 | &oc->oc_stateowner, &stp, NULL))) |
| 3051 | goto out; |
| 3052 | |
| 3053 | sop = oc->oc_stateowner; |
| 3054 | sop->so_confirmed = 1; |
| 3055 | update_stateid(&stp->st_stateid); |
| 3056 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3057 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
| 3058 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3059 | |
| 3060 | nfsd4_create_clid_dir(sop->so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3062 | if (oc->oc_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3063 | nfs4_get_stateowner(oc->oc_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3064 | cstate->replay_owner = oc->oc_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3065 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | nfs4_unlock_state(); |
| 3067 | return status; |
| 3068 | } |
| 3069 | |
| 3070 | |
| 3071 | /* |
| 3072 | * unset all bits in union bitmap (bmap) that |
| 3073 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 3074 | */ |
| 3075 | static void |
| 3076 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 3077 | { |
| 3078 | int i; |
| 3079 | for (i = 1; i < 4; i++) { |
| 3080 | if ((i & access) != i) |
| 3081 | __clear_bit(i, bmap); |
| 3082 | } |
| 3083 | } |
| 3084 | |
| 3085 | static void |
| 3086 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 3087 | { |
| 3088 | int i; |
| 3089 | for (i = 0; i < 4; i++) { |
| 3090 | if ((i & deny) != i) |
| 3091 | __clear_bit(i, bmap); |
| 3092 | } |
| 3093 | } |
| 3094 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3095 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3096 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 3097 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3098 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3100 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3101 | struct nfs4_stateid *stp; |
| 3102 | unsigned int share_access; |
| 3103 | |
| 3104 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3105 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3106 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3107 | |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 3108 | if (!access_valid(od->od_share_access, cstate->minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 3109 | || !deny_valid(od->od_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | return nfserr_inval; |
| 3111 | |
| 3112 | nfs4_lock_state(); |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3113 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3114 | od->od_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3115 | &od->od_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3116 | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | &od->od_stateowner, &stp, NULL))) |
| 3118 | goto out; |
| 3119 | |
| 3120 | status = nfserr_inval; |
| 3121 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 3122 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 3123 | stp->st_access_bmap, od->od_share_access); |
| 3124 | goto out; |
| 3125 | } |
| 3126 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 3127 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 3128 | stp->st_deny_bmap, od->od_share_deny); |
| 3129 | goto out; |
| 3130 | } |
| 3131 | set_access(&share_access, stp->st_access_bmap); |
| 3132 | nfs4_file_downgrade(stp->st_vfs_file, |
| 3133 | share_access & ~od->od_share_access); |
| 3134 | |
| 3135 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 3136 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 3137 | |
| 3138 | update_stateid(&stp->st_stateid); |
| 3139 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3140 | status = nfs_ok; |
| 3141 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3142 | if (od->od_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3143 | nfs4_get_stateowner(od->od_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3144 | cstate->replay_owner = od->od_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3145 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3146 | nfs4_unlock_state(); |
| 3147 | return status; |
| 3148 | } |
| 3149 | |
| 3150 | /* |
| 3151 | * nfs4_unlock_state() called after encode |
| 3152 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3153 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3154 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3155 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3157 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3158 | struct nfs4_stateid *stp; |
| 3159 | |
| 3160 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3161 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3162 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | |
| 3164 | nfs4_lock_state(); |
| 3165 | /* check close_lru for replay */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3166 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3167 | close->cl_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | &close->cl_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3169 | OPEN_STATE | CLOSE_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3170 | &close->cl_stateowner, &stp, NULL))) |
| 3171 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | status = nfs_ok; |
| 3173 | update_stateid(&stp->st_stateid); |
| 3174 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3175 | |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3176 | /* release_stateid() calls nfsd_close() if needed */ |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 3177 | release_open_stateid(stp); |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3178 | |
| 3179 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 3180 | * released by the laundromat service after the lease period |
| 3181 | * to enable us to handle CLOSE replay |
| 3182 | */ |
| 3183 | if (list_empty(&close->cl_stateowner->so_stateids)) |
| 3184 | move_to_close_lru(close->cl_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3186 | if (close->cl_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3187 | nfs4_get_stateowner(close->cl_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3188 | cstate->replay_owner = close->cl_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3190 | nfs4_unlock_state(); |
| 3191 | return status; |
| 3192 | } |
| 3193 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3194 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3195 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3196 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3197 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3198 | struct nfs4_delegation *dp; |
| 3199 | stateid_t *stateid = &dr->dr_stateid; |
| 3200 | struct inode *inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3201 | __be32 status; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3202 | int flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3203 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3204 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3205 | return status; |
| 3206 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3207 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3208 | if (nfsd4_has_session(cstate)) |
| 3209 | flags |= HAS_SESSION; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3210 | nfs4_lock_state(); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3211 | status = nfserr_bad_stateid; |
| 3212 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3213 | goto out; |
| 3214 | status = nfserr_stale_stateid; |
| 3215 | if (STALE_STATEID(stateid)) |
| 3216 | goto out; |
J. Bruce Fields | 7e0f7cf | 2009-02-21 13:32:28 -0800 | [diff] [blame] | 3217 | status = nfserr_bad_stateid; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3218 | if (!is_delegation_stateid(stateid)) |
| 3219 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3220 | dp = find_delegation_stateid(inode, stateid); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3221 | if (!dp) { |
| 3222 | status = stateid_error_map(stateid); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3223 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3224 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3225 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3226 | if (status) |
| 3227 | goto out; |
| 3228 | renew_client(dp->dl_client); |
| 3229 | |
| 3230 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3232 | nfs4_unlock_state(); |
| 3233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | return status; |
| 3235 | } |
| 3236 | |
| 3237 | |
| 3238 | /* |
| 3239 | * Lock owner state (byte-range locks) |
| 3240 | */ |
| 3241 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 3242 | #define LOCK_HASH_BITS 8 |
| 3243 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 3244 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 3245 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3246 | static inline u64 |
| 3247 | end_offset(u64 start, u64 len) |
| 3248 | { |
| 3249 | u64 end; |
| 3250 | |
| 3251 | end = start + len; |
| 3252 | return end >= start ? end: NFS4_MAX_UINT64; |
| 3253 | } |
| 3254 | |
| 3255 | /* last octet in a range */ |
| 3256 | static inline u64 |
| 3257 | last_byte_offset(u64 start, u64 len) |
| 3258 | { |
| 3259 | u64 end; |
| 3260 | |
| 3261 | BUG_ON(!len); |
| 3262 | end = start + len; |
| 3263 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 3264 | } |
| 3265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3266 | #define lockownerid_hashval(id) \ |
| 3267 | ((id) & LOCK_HASH_MASK) |
| 3268 | |
| 3269 | static inline unsigned int |
| 3270 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 3271 | struct xdr_netobj *ownername) |
| 3272 | { |
| 3273 | return (file_hashval(inode) + cl_id |
| 3274 | + opaque_hashval(ownername->data, ownername->len)) |
| 3275 | & LOCK_HASH_MASK; |
| 3276 | } |
| 3277 | |
| 3278 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 3279 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 3280 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 3281 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3282 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3283 | find_stateid(stateid_t *stid, int flags) |
| 3284 | { |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3285 | struct nfs4_stateid *local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3286 | u32 st_id = stid->si_stateownerid; |
| 3287 | u32 f_id = stid->si_fileid; |
| 3288 | unsigned int hashval; |
| 3289 | |
| 3290 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3291 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3292 | hashval = stateid_hashval(st_id, f_id); |
| 3293 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 3294 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 3295 | (local->st_stateid.si_fileid == f_id)) |
| 3296 | return local; |
| 3297 | } |
| 3298 | } |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3299 | |
| 3300 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3301 | hashval = stateid_hashval(st_id, f_id); |
| 3302 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 3303 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 3304 | (local->st_stateid.si_fileid == f_id)) |
| 3305 | return local; |
| 3306 | } |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3307 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3308 | return NULL; |
| 3309 | } |
| 3310 | |
| 3311 | static struct nfs4_delegation * |
| 3312 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 3313 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3314 | struct nfs4_file *fp; |
| 3315 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3317 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
| 3318 | STATEID_VAL(stid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3320 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3321 | if (!fp) |
| 3322 | return NULL; |
| 3323 | dl = find_delegation_file(fp, stid); |
| 3324 | put_nfs4_file(fp); |
| 3325 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | } |
| 3327 | |
| 3328 | /* |
| 3329 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 3330 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 3331 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 3332 | * locking, this prevents us from being completely protocol-compliant. The |
| 3333 | * real solution to this problem is to start using unsigned file offsets in |
| 3334 | * the VFS, but this is a very deep change! |
| 3335 | */ |
| 3336 | static inline void |
| 3337 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 3338 | { |
| 3339 | if (lock->fl_start < 0) |
| 3340 | lock->fl_start = OFFSET_MAX; |
| 3341 | if (lock->fl_end < 0) |
| 3342 | lock->fl_end = OFFSET_MAX; |
| 3343 | } |
| 3344 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3345 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 3346 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 3347 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3348 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3349 | |
| 3350 | static inline void |
| 3351 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 3352 | { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3353 | struct nfs4_stateowner *sop; |
| 3354 | unsigned int hval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3355 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3356 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
| 3357 | sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 3358 | hval = lockownerid_hashval(sop->so_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | kref_get(&sop->so_ref); |
| 3360 | deny->ld_sop = sop; |
| 3361 | deny->ld_clientid = sop->so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3362 | } else { |
| 3363 | deny->ld_sop = NULL; |
| 3364 | deny->ld_clientid.cl_boot = 0; |
| 3365 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | } |
| 3367 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3368 | deny->ld_length = NFS4_MAX_UINT64; |
| 3369 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3370 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 3371 | deny->ld_type = NFS4_READ_LT; |
| 3372 | if (fl->fl_type != F_RDLCK) |
| 3373 | deny->ld_type = NFS4_WRITE_LT; |
| 3374 | } |
| 3375 | |
| 3376 | static struct nfs4_stateowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3377 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 3378 | struct xdr_netobj *owner) |
| 3379 | { |
| 3380 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 3381 | struct nfs4_stateowner *op; |
| 3382 | |
| 3383 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3384 | if (same_owner_str(op, owner, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3385 | return op; |
| 3386 | } |
| 3387 | return NULL; |
| 3388 | } |
| 3389 | |
| 3390 | /* |
| 3391 | * Alloc a lock owner structure. |
| 3392 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 3393 | * occured. |
| 3394 | * |
| 3395 | * strhashval = lock_ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3396 | */ |
| 3397 | |
| 3398 | static struct nfs4_stateowner * |
| 3399 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 3400 | struct nfs4_stateowner *sop; |
| 3401 | struct nfs4_replay *rp; |
| 3402 | unsigned int idhashval; |
| 3403 | |
| 3404 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 3405 | return NULL; |
| 3406 | idhashval = lockownerid_hashval(current_ownerid); |
| 3407 | INIT_LIST_HEAD(&sop->so_idhash); |
| 3408 | INIT_LIST_HEAD(&sop->so_strhash); |
| 3409 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3410 | INIT_LIST_HEAD(&sop->so_stateids); |
| 3411 | INIT_LIST_HEAD(&sop->so_perstateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 3413 | sop->so_time = 0; |
| 3414 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 3415 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3416 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3417 | sop->so_is_open_owner = 0; |
| 3418 | sop->so_id = current_ownerid++; |
| 3419 | sop->so_client = clp; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3420 | /* It is the openowner seqid that will be incremented in encode in the |
| 3421 | * case of new lockowners; so increment the lock seqid manually: */ |
| 3422 | sop->so_seqid = lock->lk_new_lock_seqid + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3423 | sop->so_confirmed = 1; |
| 3424 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 3425 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3426 | rp->rp_buflen = 0; |
| 3427 | rp->rp_buf = rp->rp_ibuf; |
| 3428 | return sop; |
| 3429 | } |
| 3430 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3431 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3432 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 3433 | { |
| 3434 | struct nfs4_stateid *stp; |
| 3435 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 3436 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 3437 | stp = nfs4_alloc_stateid(); |
| 3438 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3439 | goto out; |
| 3440 | INIT_LIST_HEAD(&stp->st_hash); |
| 3441 | INIT_LIST_HEAD(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3442 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 3443 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 3445 | list_add(&stp->st_perfile, &fp->fi_stateids); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3446 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3447 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3448 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3449 | stp->st_file = fp; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3450 | stp->st_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 3452 | stp->st_stateid.si_fileid = fp->fi_id; |
| 3453 | stp->st_stateid.si_generation = 0; |
| 3454 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 3455 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 3456 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 3457 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | |
| 3459 | out: |
| 3460 | return stp; |
| 3461 | } |
| 3462 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3463 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | check_lock_length(u64 offset, u64 length) |
| 3465 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3466 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3467 | LOFF_OVERFLOW(offset, length))); |
| 3468 | } |
| 3469 | |
| 3470 | /* |
| 3471 | * LOCK operation |
| 3472 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3473 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3474 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3475 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3476 | { |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3477 | struct nfs4_stateowner *open_sop = NULL; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3478 | struct nfs4_stateowner *lock_sop = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3479 | struct nfs4_stateid *lock_stp; |
| 3480 | struct file *filp; |
| 3481 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 3482 | struct file_lock conflock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3483 | __be32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | unsigned int strhashval; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3485 | unsigned int cmd; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3486 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | |
| 3488 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 3489 | (long long) lock->lk_offset, |
| 3490 | (long long) lock->lk_length); |
| 3491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3492 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 3493 | return nfserr_inval; |
| 3494 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3495 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 3496 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 3497 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 3498 | return status; |
| 3499 | } |
| 3500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3501 | nfs4_lock_state(); |
| 3502 | |
| 3503 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 3504 | /* |
| 3505 | * Client indicates that this is a new lockowner. |
| 3506 | * Use open owner and open stateid to create lock owner and |
| 3507 | * lock stateid. |
| 3508 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | struct nfs4_stateid *open_stp = NULL; |
| 3510 | struct nfs4_file *fp; |
| 3511 | |
| 3512 | status = nfserr_stale_clientid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 3513 | if (!nfsd4_has_session(cstate) && |
| 3514 | STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3515 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3517 | /* validate and update open stateid and open seqid */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3518 | status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3519 | lock->lk_new_open_seqid, |
| 3520 | &lock->lk_new_open_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3521 | OPEN_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3522 | &lock->lk_replay_owner, &open_stp, |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3523 | lock); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 3524 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3525 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3526 | open_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3527 | /* create lockowner and lock stateid */ |
| 3528 | fp = open_stp->st_file; |
| 3529 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 3530 | open_sop->so_client->cl_clientid.cl_id, |
| 3531 | &lock->v.new.owner); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3532 | /* XXX: Do we need to check for duplicate stateowners on |
| 3533 | * the same file, or should they just be allowed (and |
| 3534 | * create new stateids)? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | status = nfserr_resource; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3536 | lock_sop = alloc_init_lock_stateowner(strhashval, |
| 3537 | open_sop->so_client, open_stp, lock); |
| 3538 | if (lock_sop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3539 | goto out; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3540 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 3541 | if (lock_stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3542 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3543 | } else { |
| 3544 | /* lock (lock owner + lock stateid) already exists */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3545 | status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | lock->lk_old_lock_seqid, |
| 3547 | &lock->lk_old_lock_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3548 | LOCK_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3549 | &lock->lk_replay_owner, &lock_stp, lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3550 | if (status) |
| 3551 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3552 | lock_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3553 | } |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3554 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3555 | filp = lock_stp->st_vfs_file; |
| 3556 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3557 | status = nfserr_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3558 | if (locks_in_grace() && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3559 | goto out; |
| 3560 | status = nfserr_no_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3561 | if (!locks_in_grace() && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3562 | goto out; |
| 3563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | locks_init_lock(&file_lock); |
| 3565 | switch (lock->lk_type) { |
| 3566 | case NFS4_READ_LT: |
| 3567 | case NFS4_READW_LT: |
| 3568 | file_lock.fl_type = F_RDLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3569 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3570 | break; |
| 3571 | case NFS4_WRITE_LT: |
| 3572 | case NFS4_WRITEW_LT: |
| 3573 | file_lock.fl_type = F_WRLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3574 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3575 | break; |
| 3576 | default: |
| 3577 | status = nfserr_inval; |
| 3578 | goto out; |
| 3579 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3580 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3581 | file_lock.fl_pid = current->tgid; |
| 3582 | file_lock.fl_file = filp; |
| 3583 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3584 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3585 | |
| 3586 | file_lock.fl_start = lock->lk_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3587 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3588 | nfs4_transform_lock_offset(&file_lock); |
| 3589 | |
| 3590 | /* |
| 3591 | * Try to lock the file in the VFS. |
| 3592 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 3593 | */ |
| 3594 | |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3595 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3596 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3597 | case 0: /* success! */ |
| 3598 | update_stateid(&lock_stp->st_stateid); |
| 3599 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 3600 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3601 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3602 | break; |
| 3603 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 3604 | status = nfserr_denied; |
| 3605 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 3606 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 3607 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | case (EDEADLK): |
| 3609 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3610 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3611 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3612 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3613 | status = nfserr_resource; |
| 3614 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3616 | out: |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 3617 | if (status && lock->lk_is_new && lock_sop) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3618 | release_lockowner(lock_sop); |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3619 | if (lock->lk_replay_owner) { |
| 3620 | nfs4_get_stateowner(lock->lk_replay_owner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3621 | cstate->replay_owner = lock->lk_replay_owner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3622 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | nfs4_unlock_state(); |
| 3624 | return status; |
| 3625 | } |
| 3626 | |
| 3627 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 3628 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 3629 | * so we do a temporary open here just to get an open file to pass to |
| 3630 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 3631 | * inode operation.) |
| 3632 | */ |
| 3633 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
| 3634 | { |
| 3635 | struct file *file; |
| 3636 | int err; |
| 3637 | |
| 3638 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 3639 | if (err) |
| 3640 | return err; |
| 3641 | err = vfs_test_lock(file, lock); |
| 3642 | nfsd_close(file); |
| 3643 | return err; |
| 3644 | } |
| 3645 | |
| 3646 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3647 | * LOCKT operation |
| 3648 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3649 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3650 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3651 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3652 | { |
| 3653 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3654 | struct file_lock file_lock; |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3655 | int error; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3656 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3657 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3658 | if (locks_in_grace()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | return nfserr_grace; |
| 3660 | |
| 3661 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 3662 | return nfserr_inval; |
| 3663 | |
| 3664 | lockt->lt_stateowner = NULL; |
| 3665 | nfs4_lock_state(); |
| 3666 | |
| 3667 | status = nfserr_stale_clientid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 3668 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3670 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3671 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3672 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | if (status == nfserr_symlink) |
| 3674 | status = nfserr_inval; |
| 3675 | goto out; |
| 3676 | } |
| 3677 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3678 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | locks_init_lock(&file_lock); |
| 3680 | switch (lockt->lt_type) { |
| 3681 | case NFS4_READ_LT: |
| 3682 | case NFS4_READW_LT: |
| 3683 | file_lock.fl_type = F_RDLCK; |
| 3684 | break; |
| 3685 | case NFS4_WRITE_LT: |
| 3686 | case NFS4_WRITEW_LT: |
| 3687 | file_lock.fl_type = F_WRLCK; |
| 3688 | break; |
| 3689 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 3690 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3691 | status = nfserr_inval; |
| 3692 | goto out; |
| 3693 | } |
| 3694 | |
| 3695 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 3696 | &lockt->lt_clientid, &lockt->lt_owner); |
| 3697 | if (lockt->lt_stateowner) |
| 3698 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 3699 | file_lock.fl_pid = current->tgid; |
| 3700 | file_lock.fl_flags = FL_POSIX; |
| 3701 | |
| 3702 | file_lock.fl_start = lockt->lt_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3703 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3704 | |
| 3705 | nfs4_transform_lock_offset(&file_lock); |
| 3706 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3707 | status = nfs_ok; |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 3708 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3709 | if (error) { |
| 3710 | status = nfserrno(error); |
| 3711 | goto out; |
| 3712 | } |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 3713 | if (file_lock.fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3714 | status = nfserr_denied; |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 3715 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3716 | } |
| 3717 | out: |
| 3718 | nfs4_unlock_state(); |
| 3719 | return status; |
| 3720 | } |
| 3721 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3722 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3723 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3724 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3725 | { |
| 3726 | struct nfs4_stateid *stp; |
| 3727 | struct file *filp = NULL; |
| 3728 | struct file_lock file_lock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3729 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3730 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3731 | |
| 3732 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 3733 | (long long) locku->lu_offset, |
| 3734 | (long long) locku->lu_length); |
| 3735 | |
| 3736 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 3737 | return nfserr_inval; |
| 3738 | |
| 3739 | nfs4_lock_state(); |
| 3740 | |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3741 | if ((status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | locku->lu_seqid, |
| 3743 | &locku->lu_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3744 | LOCK_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3745 | &locku->lu_stateowner, &stp, NULL))) |
| 3746 | goto out; |
| 3747 | |
| 3748 | filp = stp->st_vfs_file; |
| 3749 | BUG_ON(!filp); |
| 3750 | locks_init_lock(&file_lock); |
| 3751 | file_lock.fl_type = F_UNLCK; |
| 3752 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 3753 | file_lock.fl_pid = current->tgid; |
| 3754 | file_lock.fl_file = filp; |
| 3755 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3756 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3757 | file_lock.fl_start = locku->lu_offset; |
| 3758 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3759 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3760 | nfs4_transform_lock_offset(&file_lock); |
| 3761 | |
| 3762 | /* |
| 3763 | * Try to unlock the file in the VFS. |
| 3764 | */ |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3765 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3766 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3767 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3768 | goto out_nfserr; |
| 3769 | } |
| 3770 | /* |
| 3771 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 3772 | */ |
| 3773 | update_stateid(&stp->st_stateid); |
| 3774 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3775 | |
| 3776 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3777 | if (locku->lu_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3778 | nfs4_get_stateowner(locku->lu_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3779 | cstate->replay_owner = locku->lu_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3780 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3781 | nfs4_unlock_state(); |
| 3782 | return status; |
| 3783 | |
| 3784 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3785 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3786 | goto out; |
| 3787 | } |
| 3788 | |
| 3789 | /* |
| 3790 | * returns |
| 3791 | * 1: locks held by lockowner |
| 3792 | * 0: no locks held by lockowner |
| 3793 | */ |
| 3794 | static int |
| 3795 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 3796 | { |
| 3797 | struct file_lock **flpp; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 3798 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3799 | int status = 0; |
| 3800 | |
| 3801 | lock_kernel(); |
| 3802 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3803 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3804 | status = 1; |
| 3805 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3806 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3807 | } |
| 3808 | out: |
| 3809 | unlock_kernel(); |
| 3810 | return status; |
| 3811 | } |
| 3812 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3813 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3814 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 3815 | struct nfsd4_compound_state *cstate, |
| 3816 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | { |
| 3818 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3819 | struct nfs4_stateowner *sop; |
| 3820 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3822 | struct list_head matches; |
| 3823 | int i; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3824 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3825 | |
| 3826 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 3827 | clid->cl_boot, clid->cl_id); |
| 3828 | |
| 3829 | /* XXX check for lease expiration */ |
| 3830 | |
| 3831 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3832 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3833 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3834 | |
| 3835 | nfs4_lock_state(); |
| 3836 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3837 | status = nfserr_locks_held; |
| 3838 | /* XXX: we're doing a linear search through all the lockowners. |
| 3839 | * Yipes! For now we'll just hope clients aren't really using |
| 3840 | * release_lockowner much, but eventually we have to fix these |
| 3841 | * data structures. */ |
| 3842 | INIT_LIST_HEAD(&matches); |
| 3843 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3844 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3845 | if (!same_owner_str(sop, owner, clid)) |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3846 | continue; |
| 3847 | list_for_each_entry(stp, &sop->so_stateids, |
| 3848 | st_perstateowner) { |
| 3849 | if (check_for_locks(stp->st_vfs_file, sop)) |
| 3850 | goto out; |
| 3851 | /* Note: so_perclient unused for lockowners, |
| 3852 | * so it's OK to fool with here. */ |
| 3853 | list_add(&sop->so_perclient, &matches); |
| 3854 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3855 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3856 | } |
| 3857 | /* Clients probably won't expect us to return with some (but not all) |
| 3858 | * of the lockowner state released; so don't release any until all |
| 3859 | * have been checked. */ |
| 3860 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 3861 | while (!list_empty(&matches)) { |
| 3862 | sop = list_entry(matches.next, struct nfs4_stateowner, |
| 3863 | so_perclient); |
| 3864 | /* unhash_stateowner deletes so_perclient only |
| 3865 | * for openowners. */ |
| 3866 | list_del(&sop->so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3867 | release_lockowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3868 | } |
| 3869 | out: |
| 3870 | nfs4_unlock_state(); |
| 3871 | return status; |
| 3872 | } |
| 3873 | |
| 3874 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3875 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3876 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3877 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3878 | } |
| 3879 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3880 | int |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 3881 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3882 | { |
| 3883 | unsigned int strhashval = clientstr_hashval(name); |
| 3884 | struct nfs4_client *clp; |
| 3885 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 3886 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3887 | return clp ? 1 : 0; |
| 3888 | } |
| 3889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3890 | /* |
| 3891 | * failure => all reset bets are off, nfserr_no_grace... |
| 3892 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3893 | int |
| 3894 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | { |
| 3896 | unsigned int strhashval; |
| 3897 | struct nfs4_client_reclaim *crp = NULL; |
| 3898 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3899 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3900 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | if (!crp) |
| 3902 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3903 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3905 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3906 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | reclaim_str_hashtbl_size++; |
| 3908 | return 1; |
| 3909 | } |
| 3910 | |
| 3911 | static void |
| 3912 | nfs4_release_reclaim(void) |
| 3913 | { |
| 3914 | struct nfs4_client_reclaim *crp = NULL; |
| 3915 | int i; |
| 3916 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3917 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3918 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3919 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3920 | struct nfs4_client_reclaim, cr_strhash); |
| 3921 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3922 | kfree(crp); |
| 3923 | reclaim_str_hashtbl_size--; |
| 3924 | } |
| 3925 | } |
| 3926 | BUG_ON(reclaim_str_hashtbl_size); |
| 3927 | } |
| 3928 | |
| 3929 | /* |
| 3930 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3931 | static struct nfs4_client_reclaim * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3932 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3933 | { |
| 3934 | unsigned int strhashval; |
| 3935 | struct nfs4_client *clp; |
| 3936 | struct nfs4_client_reclaim *crp = NULL; |
| 3937 | |
| 3938 | |
| 3939 | /* find clientid in conf_id_hashtbl */ |
| 3940 | clp = find_confirmed_client(clid); |
| 3941 | if (clp == NULL) |
| 3942 | return NULL; |
| 3943 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3944 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3945 | clp->cl_name.len, clp->cl_name.data, |
| 3946 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | |
| 3948 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3949 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3950 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3951 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3952 | return crp; |
| 3953 | } |
| 3954 | } |
| 3955 | return NULL; |
| 3956 | } |
| 3957 | |
| 3958 | /* |
| 3959 | * Called from OPEN. Look for clientid in reclaim list. |
| 3960 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3961 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3962 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3963 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3964 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3965 | } |
| 3966 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3967 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3968 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3969 | int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3970 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3971 | { |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3972 | int i, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3973 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3974 | status = nfsd4_init_slabs(); |
| 3975 | if (status) |
| 3976 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3977 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3978 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3979 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3980 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3981 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
Wang Chen | 02cb285 | 2009-04-24 15:41:57 +0800 | [diff] [blame] | 3982 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3983 | } |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 3984 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
| 3985 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3986 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3987 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3988 | } |
| 3989 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3990 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3991 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3992 | } |
| 3993 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3994 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3995 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3996 | } |
| 3997 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3998 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3999 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 4000 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4001 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4002 | INIT_LIST_HEAD(&close_lru); |
| 4003 | INIT_LIST_HEAD(&client_lru); |
| 4004 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4005 | reclaim_str_hashtbl_size = 0; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 4006 | return 0; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4007 | } |
| 4008 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4009 | static void |
| 4010 | nfsd4_load_reboot_recovery_data(void) |
| 4011 | { |
| 4012 | int status; |
| 4013 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4014 | nfs4_lock_state(); |
| 4015 | nfsd4_init_recdir(user_recovery_dirname); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4016 | status = nfsd4_recdir_load(); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4017 | nfs4_unlock_state(); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4018 | if (status) |
| 4019 | printk("NFSD: Failure reading reboot recovery data\n"); |
| 4020 | } |
| 4021 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4022 | /* |
| 4023 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 4024 | * client may quite reasonably hang on to a delegation as long as it has |
| 4025 | * the inode cached. This becomes an obvious problem the first time a |
| 4026 | * client's inode cache approaches the size of the server's total memory. |
| 4027 | * |
| 4028 | * For now we avoid this problem by imposing a hard limit on the number |
| 4029 | * of delegations, which varies according to the server's memory size. |
| 4030 | */ |
| 4031 | static void |
| 4032 | set_max_delegations(void) |
| 4033 | { |
| 4034 | /* |
| 4035 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 4036 | * estimates suggest that in the worst case (where every delegation |
| 4037 | * is for a different inode), a delegation could take about 1.5K, |
| 4038 | * giving a worst case usage of about 6% of memory. |
| 4039 | */ |
| 4040 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 4041 | } |
| 4042 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4043 | /* initialization to perform when the nfsd service is started: */ |
| 4044 | |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4045 | static int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4046 | __nfs4_state_start(void) |
| 4047 | { |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4048 | int ret; |
| 4049 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4050 | boot_time = get_seconds(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4051 | locks_start_grace(&nfsd4_manager); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 4052 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 4053 | nfsd4_grace); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4054 | ret = set_callback_cred(); |
| 4055 | if (ret) |
| 4056 | return -ENOMEM; |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 4057 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4058 | if (laundry_wq == NULL) |
| 4059 | return -ENOMEM; |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4060 | ret = nfsd4_create_callback_queue(); |
| 4061 | if (ret) |
| 4062 | goto out_free_laundry; |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 4063 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4064 | set_max_delegations(); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4065 | return 0; |
| 4066 | out_free_laundry: |
| 4067 | destroy_workqueue(laundry_wq); |
| 4068 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | } |
| 4070 | |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4071 | int |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 4072 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4073 | { |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4074 | int ret; |
| 4075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4076 | if (nfs4_init) |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4077 | return 0; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4078 | nfsd4_load_reboot_recovery_data(); |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4079 | ret = __nfs4_state_start(); |
| 4080 | if (ret) |
| 4081 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | nfs4_init = 1; |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4083 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | } |
| 4085 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4086 | static void |
| 4087 | __nfs4_state_shutdown(void) |
| 4088 | { |
| 4089 | int i; |
| 4090 | struct nfs4_client *clp = NULL; |
| 4091 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | struct list_head *pos, *next, reaplist; |
| 4093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4094 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4095 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 4096 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 4097 | expire_client(clp); |
| 4098 | } |
| 4099 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 4100 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 4101 | expire_client(clp); |
| 4102 | } |
| 4103 | } |
| 4104 | INIT_LIST_HEAD(&reaplist); |
| 4105 | spin_lock(&recall_lock); |
| 4106 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 4107 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4108 | list_move(&dp->dl_recall_lru, &reaplist); |
| 4109 | } |
| 4110 | spin_unlock(&recall_lock); |
| 4111 | list_for_each_safe(pos, next, &reaplist) { |
| 4112 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4113 | list_del_init(&dp->dl_recall_lru); |
| 4114 | unhash_delegation(dp); |
| 4115 | } |
| 4116 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4117 | nfsd4_shutdown_recdir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4118 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4119 | } |
| 4120 | |
| 4121 | void |
| 4122 | nfs4_state_shutdown(void) |
| 4123 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 4124 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
| 4125 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | 2c5e761 | 2008-11-20 14:36:17 -0600 | [diff] [blame] | 4126 | locks_end_grace(&nfsd4_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4127 | nfs4_lock_state(); |
| 4128 | nfs4_release_reclaim(); |
| 4129 | __nfs4_state_shutdown(); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4130 | nfsd4_destroy_callback_queue(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4131 | nfs4_unlock_state(); |
| 4132 | } |
| 4133 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 4134 | /* |
| 4135 | * user_recovery_dirname is protected by the nfsd_mutex since it's only |
| 4136 | * accessed when nfsd is starting. |
| 4137 | */ |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4138 | static void |
| 4139 | nfs4_set_recdir(char *recdir) |
| 4140 | { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4141 | strcpy(user_recovery_dirname, recdir); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4142 | } |
| 4143 | |
| 4144 | /* |
| 4145 | * Change the NFSv4 recovery directory to recdir. |
| 4146 | */ |
| 4147 | int |
| 4148 | nfs4_reset_recoverydir(char *recdir) |
| 4149 | { |
| 4150 | int status; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4151 | struct path path; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4152 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4153 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4154 | if (status) |
| 4155 | return status; |
| 4156 | status = -ENOTDIR; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4157 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4158 | nfs4_set_recdir(recdir); |
| 4159 | status = 0; |
| 4160 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4161 | path_put(&path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4162 | return status; |
| 4163 | } |
| 4164 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 4165 | char * |
| 4166 | nfs4_recoverydir(void) |
| 4167 | { |
| 4168 | return user_recovery_dirname; |
| 4169 | } |