Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfsd/nfs4state.c |
| 3 | * |
| 4 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Kendrick Smith <kmsmith@umich.edu> |
| 8 | * Andy Adamson <kandros@umich.edu> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its |
| 20 | * contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | * |
| 35 | */ |
| 36 | |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 37 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/smp_lock.h> |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 39 | #include <linux/namei.h> |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 40 | #include <linux/swap.h> |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 41 | #include <linux/sunrpc/svcauth_gss.h> |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 42 | #include <linux/sunrpc/clnt.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 43 | #include "xdr4.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 44 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 47 | |
| 48 | /* Globals */ |
| 49 | static time_t lease_time = 90; /* default lease time */ |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 50 | static time_t user_lease_time = 90; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 51 | static time_t boot_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static u32 current_ownerid = 1; |
| 53 | static u32 current_fileid = 1; |
| 54 | static u32 current_delegid = 1; |
| 55 | static u32 nfs4_init; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 56 | static stateid_t zerostateid; /* bits all 0 */ |
| 57 | static stateid_t onestateid; /* bits all 1 */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 58 | static u64 current_sessionid = 1; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 59 | |
| 60 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) |
| 61 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* forward declarations */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 64 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 66 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
| 67 | static void nfs4_set_recdir(char *recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 69 | /* Locking: */ |
| 70 | |
| 71 | /* Currently used for almost all code touching nfsv4 state: */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 72 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 74 | /* |
| 75 | * Currently used for the del_recall_lru and file hash table. In an |
| 76 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 77 | * eventually cover more: |
| 78 | */ |
| 79 | static DEFINE_SPINLOCK(recall_lock); |
| 80 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 81 | static struct kmem_cache *stateowner_slab = NULL; |
| 82 | static struct kmem_cache *file_slab = NULL; |
| 83 | static struct kmem_cache *stateid_slab = NULL; |
| 84 | static struct kmem_cache *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | void |
| 87 | nfs4_lock_state(void) |
| 88 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 89 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | void |
| 93 | nfs4_unlock_state(void) |
| 94 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 95 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | static inline u32 |
| 99 | opaque_hashval(const void *ptr, int nbytes) |
| 100 | { |
| 101 | unsigned char *cptr = (unsigned char *) ptr; |
| 102 | |
| 103 | u32 x = 0; |
| 104 | while (nbytes--) { |
| 105 | x *= 37; |
| 106 | x += *cptr++; |
| 107 | } |
| 108 | return x; |
| 109 | } |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | static struct list_head del_recall_lru; |
| 112 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 113 | static inline void |
| 114 | put_nfs4_file(struct nfs4_file *fi) |
| 115 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 116 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
| 117 | list_del(&fi->fi_hash); |
| 118 | spin_unlock(&recall_lock); |
| 119 | iput(fi->fi_inode); |
| 120 | kmem_cache_free(file_slab, fi); |
| 121 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | static inline void |
| 125 | get_nfs4_file(struct nfs4_file *fi) |
| 126 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 127 | atomic_inc(&fi->fi_ref); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 128 | } |
| 129 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 130 | static int num_delegations; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 131 | unsigned int max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 132 | |
| 133 | /* |
| 134 | * Open owner state (share locks) |
| 135 | */ |
| 136 | |
| 137 | /* hash tables for nfs4_stateowner */ |
| 138 | #define OWNER_HASH_BITS 8 |
| 139 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 140 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
| 141 | |
| 142 | #define ownerid_hashval(id) \ |
| 143 | ((id) & OWNER_HASH_MASK) |
| 144 | #define ownerstr_hashval(clientid, ownername) \ |
| 145 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) |
| 146 | |
| 147 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; |
| 148 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
| 149 | |
| 150 | /* hash table for nfs4_file */ |
| 151 | #define FILE_HASH_BITS 8 |
| 152 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
| 153 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) |
| 154 | /* hash table for (open)nfs4_stateid */ |
| 155 | #define STATEID_HASH_BITS 10 |
| 156 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) |
| 157 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) |
| 158 | |
| 159 | #define file_hashval(x) \ |
| 160 | hash_ptr(x, FILE_HASH_BITS) |
| 161 | #define stateid_hashval(owner_id, file_id) \ |
| 162 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) |
| 163 | |
| 164 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
| 165 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; |
| 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | static struct nfs4_delegation * |
| 168 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) |
| 169 | { |
| 170 | struct nfs4_delegation *dp; |
| 171 | struct nfs4_file *fp = stp->st_file; |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 172 | 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] | 173 | |
| 174 | dprintk("NFSD alloc_init_deleg\n"); |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 175 | if (fp->fi_had_conflict) |
| 176 | return NULL; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 177 | if (num_delegations > max_delegations) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 178 | return NULL; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 179 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
| 180 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | return dp; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 182 | num_delegations++; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 183 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 184 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
| 186 | dp->dl_client = clp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 187 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | dp->dl_file = fp; |
| 189 | dp->dl_flock = NULL; |
| 190 | get_file(stp->st_vfs_file); |
| 191 | dp->dl_vfs_file = stp->st_vfs_file; |
| 192 | dp->dl_type = type; |
J. Bruce Fields | b53d40c | 2009-05-01 19:50:00 -0400 | [diff] [blame] | 193 | dp->dl_ident = cb->cb_ident; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 194 | dp->dl_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | dp->dl_stateid.si_stateownerid = current_delegid++; |
| 196 | dp->dl_stateid.si_fileid = 0; |
| 197 | dp->dl_stateid.si_generation = 0; |
J. Bruce Fields | 6c02eaa | 2009-02-02 17:30:51 -0500 | [diff] [blame] | 198 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | dp->dl_time = 0; |
| 200 | atomic_set(&dp->dl_count, 1); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 201 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 202 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
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 | |
| 253 | /* Hash tables for nfs4_clientid state */ |
| 254 | #define CLIENT_HASH_BITS 4 |
| 255 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 256 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 257 | |
| 258 | #define clientid_hashval(id) \ |
| 259 | ((id) & CLIENT_HASH_MASK) |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 260 | #define clientstr_hashval(name) \ |
| 261 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | /* |
| 263 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 264 | * used in reboot/reset lease grace period processing |
| 265 | * |
| 266 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 267 | * setclientid_confirmed info. |
| 268 | * |
| 269 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 270 | * setclientid info. |
| 271 | * |
| 272 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 273 | * for lease renewal. |
| 274 | * |
| 275 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 276 | * for last close replay. |
| 277 | */ |
| 278 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 279 | static int reclaim_str_hashtbl_size = 0; |
| 280 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 281 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 282 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 283 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 284 | static struct list_head client_lru; |
| 285 | static struct list_head close_lru; |
| 286 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 287 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
| 288 | { |
| 289 | list_del(&stp->st_hash); |
| 290 | list_del(&stp->st_perfile); |
| 291 | list_del(&stp->st_perstateowner); |
| 292 | } |
| 293 | |
| 294 | static void free_generic_stateid(struct nfs4_stateid *stp) |
| 295 | { |
| 296 | put_nfs4_file(stp->st_file); |
| 297 | kmem_cache_free(stateid_slab, stp); |
| 298 | } |
| 299 | |
| 300 | static void release_lock_stateid(struct nfs4_stateid *stp) |
| 301 | { |
| 302 | unhash_generic_stateid(stp); |
| 303 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); |
| 304 | free_generic_stateid(stp); |
| 305 | } |
| 306 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 307 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
| 308 | { |
| 309 | struct nfs4_stateid *stp; |
| 310 | |
| 311 | list_del(&sop->so_idhash); |
| 312 | list_del(&sop->so_strhash); |
| 313 | list_del(&sop->so_perstateid); |
| 314 | while (!list_empty(&sop->so_stateids)) { |
| 315 | stp = list_first_entry(&sop->so_stateids, |
| 316 | struct nfs4_stateid, st_perstateowner); |
| 317 | release_lock_stateid(stp); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | static void release_lockowner(struct nfs4_stateowner *sop) |
| 322 | { |
| 323 | unhash_lockowner(sop); |
| 324 | nfs4_put_stateowner(sop); |
| 325 | } |
| 326 | |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 327 | static void |
| 328 | release_stateid_lockowners(struct nfs4_stateid *open_stp) |
| 329 | { |
| 330 | struct nfs4_stateowner *lock_sop; |
| 331 | |
| 332 | while (!list_empty(&open_stp->st_lockowners)) { |
| 333 | lock_sop = list_entry(open_stp->st_lockowners.next, |
| 334 | struct nfs4_stateowner, so_perstateid); |
| 335 | /* list_del(&open_stp->st_lockowners); */ |
| 336 | BUG_ON(lock_sop->so_is_open_owner); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 337 | release_lockowner(lock_sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 338 | } |
| 339 | } |
| 340 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 341 | static void release_open_stateid(struct nfs4_stateid *stp) |
| 342 | { |
| 343 | unhash_generic_stateid(stp); |
| 344 | release_stateid_lockowners(stp); |
| 345 | nfsd_close(stp->st_vfs_file); |
| 346 | free_generic_stateid(stp); |
| 347 | } |
| 348 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 349 | static void unhash_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 350 | { |
| 351 | struct nfs4_stateid *stp; |
| 352 | |
| 353 | list_del(&sop->so_idhash); |
| 354 | list_del(&sop->so_strhash); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 355 | list_del(&sop->so_perclient); |
| 356 | list_del(&sop->so_perstateid); /* XXX: necessary? */ |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 357 | while (!list_empty(&sop->so_stateids)) { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 358 | stp = list_first_entry(&sop->so_stateids, |
| 359 | struct nfs4_stateid, st_perstateowner); |
| 360 | release_open_stateid(stp); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 361 | } |
| 362 | } |
| 363 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 364 | static void release_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 365 | { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 366 | unhash_openowner(sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 367 | list_del(&sop->so_close_lru); |
| 368 | nfs4_put_stateowner(sop); |
| 369 | } |
| 370 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 371 | static DEFINE_SPINLOCK(sessionid_lock); |
| 372 | #define SESSION_HASH_SIZE 512 |
| 373 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; |
| 374 | |
| 375 | static inline int |
| 376 | hash_sessionid(struct nfs4_sessionid *sessionid) |
| 377 | { |
| 378 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; |
| 379 | |
| 380 | return sid->sequence % SESSION_HASH_SIZE; |
| 381 | } |
| 382 | |
| 383 | static inline void |
| 384 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 385 | { |
| 386 | u32 *ptr = (u32 *)(&sessionid->data[0]); |
| 387 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 388 | } |
| 389 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 390 | static void |
| 391 | gen_sessionid(struct nfsd4_session *ses) |
| 392 | { |
| 393 | struct nfs4_client *clp = ses->se_client; |
| 394 | struct nfsd4_sessionid *sid; |
| 395 | |
| 396 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; |
| 397 | sid->clientid = clp->cl_clientid; |
| 398 | sid->sequence = current_sessionid++; |
| 399 | sid->reserved = 0; |
| 400 | } |
| 401 | |
| 402 | /* |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 403 | * The protocol defines ca_maxresponssize_cached to include the size of |
| 404 | * the rpc header, but all we need to cache is the data starting after |
| 405 | * the end of the initial SEQUENCE operation--the rest we regenerate |
| 406 | * each time. Therefore we can advertise a ca_maxresponssize_cached |
| 407 | * value that is the number of bytes in our cache plus a few additional |
| 408 | * bytes. In order to stay on the safe side, and not promise more than |
| 409 | * we can cache, those additional bytes must be the minimum possible: 24 |
| 410 | * bytes of rpc header (xid through accept state, with AUTH_NULL |
| 411 | * verifier), 12 for the compound header (with zero-length tag), and 44 |
| 412 | * for the SEQUENCE op response: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 413 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 414 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) |
| 415 | |
| 416 | /* |
| 417 | * Give the client the number of ca_maxresponsesize_cached slots it |
| 418 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, |
| 419 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more |
| 420 | * than NFSD_MAX_SLOTS_PER_SESSION. |
| 421 | * |
| 422 | * If we run out of reserved DRC memory we should (up to a point) |
| 423 | * re-negotiate active sessions and reduce their slot usage to make |
| 424 | * rooom for new connections. For now we just fail the create session. |
| 425 | */ |
| 426 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 427 | { |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 428 | int mem, size = fchan->maxresp_cached; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 429 | |
Andy Adamson | 5d77ddf | 2009-06-16 04:19:38 +0300 | [diff] [blame] | 430 | if (fchan->maxreqs < 1) |
| 431 | return nfserr_inval; |
Andy Adamson | 5d77ddf | 2009-06-16 04:19:38 +0300 | [diff] [blame] | 432 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 433 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
| 434 | size = NFSD_MIN_HDR_SEQ_SZ; |
| 435 | size -= NFSD_MIN_HDR_SEQ_SZ; |
| 436 | if (size > NFSD_SLOT_CACHE_SIZE) |
| 437 | size = NFSD_SLOT_CACHE_SIZE; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 438 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 439 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
| 440 | mem = fchan->maxreqs * size; |
| 441 | if (mem > NFSD_MAX_MEM_PER_SESSION) { |
| 442 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; |
| 443 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) |
| 444 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; |
| 445 | mem = fchan->maxreqs * size; |
| 446 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 447 | |
Andy Adamson | 4bd9b0f4 | 2009-06-24 15:37:45 -0400 | [diff] [blame] | 448 | spin_lock(&nfsd_drc_lock); |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 449 | /* bound the total session drc memory ussage */ |
| 450 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { |
| 451 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; |
| 452 | mem = fchan->maxreqs * size; |
| 453 | } |
Andy Adamson | 0c19305 | 2009-07-27 19:09:19 -0400 | [diff] [blame] | 454 | nfsd_drc_mem_used += mem; |
Andy Adamson | 4bd9b0f4 | 2009-06-24 15:37:45 -0400 | [diff] [blame] | 455 | spin_unlock(&nfsd_drc_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 456 | |
Andy Adamson | b101ebb | 2009-07-27 18:40:09 -0400 | [diff] [blame] | 457 | if (fchan->maxreqs == 0) |
Andy Adamson | bdac86e | 2009-08-28 08:45:03 -0400 | [diff] [blame] | 458 | return nfserr_serverfault; |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 459 | |
| 460 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; |
Andy Adamson | b101ebb | 2009-07-27 18:40:09 -0400 | [diff] [blame] | 461 | return 0; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /* |
| 465 | * 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] | 466 | * sv_max_mesg is the maximum payload plus one page for overhead. |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 467 | */ |
| 468 | static int init_forechannel_attrs(struct svc_rqst *rqstp, |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 469 | struct nfsd4_channel_attrs *session_fchan, |
| 470 | struct nfsd4_channel_attrs *fchan) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 471 | { |
| 472 | int status = 0; |
Andy Adamson | ddc04fd | 2009-09-23 21:32:21 -0400 | [diff] [blame] | 473 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 474 | |
| 475 | /* headerpadsz set to zero in encode routine */ |
| 476 | |
| 477 | /* Use the client's max request and max response size if possible */ |
| 478 | if (fchan->maxreq_sz > maxcount) |
| 479 | fchan->maxreq_sz = maxcount; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 480 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 481 | |
| 482 | if (fchan->maxresp_sz > maxcount) |
| 483 | fchan->maxresp_sz = maxcount; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 484 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 485 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 486 | /* Use the client's maxops if possible */ |
| 487 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) |
| 488 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 489 | session_fchan->maxops = fchan->maxops; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 490 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 491 | /* FIXME: Error means no more DRC pages so the server should |
| 492 | * recover pages from existing sessions. For now fail session |
| 493 | * creation. |
| 494 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 495 | status = set_forechannel_drc_size(fchan); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 496 | |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 497 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 498 | session_fchan->maxreqs = fchan->maxreqs; |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 499 | |
| 500 | dprintk("%s status %d\n", __func__, status); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 501 | return status; |
| 502 | } |
| 503 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 504 | static void |
| 505 | free_session_slots(struct nfsd4_session *ses) |
| 506 | { |
| 507 | int i; |
| 508 | |
| 509 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) |
| 510 | kfree(ses->se_slots[i]); |
| 511 | } |
| 512 | |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 513 | /* |
| 514 | * We don't actually need to cache the rpc and session headers, so we |
| 515 | * can allocate a little less for each slot: |
| 516 | */ |
| 517 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) |
| 518 | { |
| 519 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; |
| 520 | } |
| 521 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 522 | static int |
| 523 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, |
| 524 | struct nfsd4_create_session *cses) |
| 525 | { |
| 526 | struct nfsd4_session *new, tmp; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 527 | struct nfsd4_slot *sp; |
| 528 | int idx, slotsize, cachesize, i; |
| 529 | int status; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 530 | |
| 531 | memset(&tmp, 0, sizeof(tmp)); |
| 532 | |
| 533 | /* FIXME: For now, we just accept the client back channel attributes. */ |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 534 | tmp.se_bchannel = cses->back_channel; |
| 535 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, |
| 536 | &cses->fore_channel); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 537 | if (status) |
| 538 | goto out; |
| 539 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 540 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
| 541 | + sizeof(struct nfsd4_session) > PAGE_SIZE); |
| 542 | |
| 543 | status = nfserr_serverfault; |
| 544 | /* allocate struct nfsd4_session and slot table pointers in one piece */ |
| 545 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 546 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
| 547 | if (!new) |
| 548 | goto out; |
| 549 | |
| 550 | memcpy(new, &tmp, sizeof(*new)); |
| 551 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 552 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 553 | cachesize = slot_bytes(&new->se_fchannel); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 554 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
| 555 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); |
| 556 | if (!sp) |
| 557 | goto out_free; |
| 558 | new->se_slots[i] = sp; |
| 559 | } |
| 560 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 561 | new->se_client = clp; |
| 562 | gen_sessionid(new); |
| 563 | idx = hash_sessionid(&new->se_sessionid); |
| 564 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, |
| 565 | NFS4_MAX_SESSIONID_LEN); |
| 566 | |
| 567 | new->se_flags = cses->flags; |
| 568 | kref_init(&new->se_ref); |
| 569 | spin_lock(&sessionid_lock); |
| 570 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
| 571 | list_add(&new->se_perclnt, &clp->cl_sessions); |
| 572 | spin_unlock(&sessionid_lock); |
| 573 | |
| 574 | status = nfs_ok; |
| 575 | out: |
| 576 | return status; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 577 | out_free: |
| 578 | free_session_slots(new); |
| 579 | kfree(new); |
| 580 | goto out; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 581 | } |
| 582 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 583 | /* caller must hold sessionid_lock */ |
| 584 | static struct nfsd4_session * |
| 585 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) |
| 586 | { |
| 587 | struct nfsd4_session *elem; |
| 588 | int idx; |
| 589 | |
| 590 | dump_sessionid(__func__, sessionid); |
| 591 | idx = hash_sessionid(sessionid); |
| 592 | dprintk("%s: idx is %d\n", __func__, idx); |
| 593 | /* Search in the appropriate list */ |
| 594 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { |
| 595 | dump_sessionid("list traversal", &elem->se_sessionid); |
| 596 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
| 597 | NFS4_MAX_SESSIONID_LEN)) { |
| 598 | return elem; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | dprintk("%s: session not found\n", __func__); |
| 603 | return NULL; |
| 604 | } |
| 605 | |
| 606 | /* caller must hold sessionid_lock */ |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 607 | static void |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 608 | unhash_session(struct nfsd4_session *ses) |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 609 | { |
| 610 | list_del(&ses->se_hash); |
| 611 | list_del(&ses->se_perclnt); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | static void |
| 615 | release_session(struct nfsd4_session *ses) |
| 616 | { |
| 617 | spin_lock(&sessionid_lock); |
| 618 | unhash_session(ses); |
| 619 | spin_unlock(&sessionid_lock); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 620 | nfsd4_put_session(ses); |
| 621 | } |
| 622 | |
| 623 | void |
| 624 | free_session(struct kref *kref) |
| 625 | { |
| 626 | struct nfsd4_session *ses; |
J. Bruce Fields | dd829c4 | 2009-10-21 17:54:13 -0400 | [diff] [blame] | 627 | int mem; |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 628 | |
| 629 | ses = container_of(kref, struct nfsd4_session, se_ref); |
Andy Adamson | be98d1b | 2009-07-27 18:49:05 -0400 | [diff] [blame] | 630 | spin_lock(&nfsd_drc_lock); |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 631 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
J. Bruce Fields | dd829c4 | 2009-10-21 17:54:13 -0400 | [diff] [blame] | 632 | nfsd_drc_mem_used -= mem; |
Andy Adamson | be98d1b | 2009-07-27 18:49:05 -0400 | [diff] [blame] | 633 | spin_unlock(&nfsd_drc_lock); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 634 | free_session_slots(ses); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 635 | kfree(ses); |
| 636 | } |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | static inline void |
| 639 | renew_client(struct nfs4_client *clp) |
| 640 | { |
| 641 | /* |
| 642 | * Move client to the end to the LRU list. |
| 643 | */ |
| 644 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 645 | clp->cl_clientid.cl_boot, |
| 646 | clp->cl_clientid.cl_id); |
| 647 | list_move_tail(&clp->cl_lru, &client_lru); |
| 648 | clp->cl_time = get_seconds(); |
| 649 | } |
| 650 | |
| 651 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 652 | static int |
| 653 | STALE_CLIENTID(clientid_t *clid) |
| 654 | { |
| 655 | if (clid->cl_boot == boot_time) |
| 656 | return 0; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 657 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
| 658 | clid->cl_boot, clid->cl_id, boot_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | return 1; |
| 660 | } |
| 661 | |
| 662 | /* |
| 663 | * XXX Should we use a slab cache ? |
| 664 | * This type of memory management is somewhat inefficient, but we use it |
| 665 | * anyway since SETCLIENTID is not a common operation. |
| 666 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 667 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | { |
| 669 | struct nfs4_client *clp; |
| 670 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 671 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 672 | if (clp == NULL) |
| 673 | return NULL; |
| 674 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); |
| 675 | if (clp->cl_name.data == NULL) { |
| 676 | kfree(clp); |
| 677 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 679 | memcpy(clp->cl_name.data, name.data, name.len); |
| 680 | clp->cl_name.len = name.len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | return clp; |
| 682 | } |
| 683 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 684 | static void |
| 685 | shutdown_callback_client(struct nfs4_client *clp) |
| 686 | { |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 687 | struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 688 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 689 | if (clnt) { |
J. Bruce Fields | 404ec11 | 2007-11-23 22:26:18 -0500 | [diff] [blame] | 690 | /* |
| 691 | * Callback threads take a reference on the client, so there |
| 692 | * should be no outstanding callbacks at this point. |
| 693 | */ |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 694 | clp->cl_cb_conn.cb_client = NULL; |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 695 | rpc_shutdown_client(clnt); |
| 696 | } |
| 697 | } |
| 698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | static inline void |
| 700 | free_client(struct nfs4_client *clp) |
| 701 | { |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 702 | shutdown_callback_client(clp); |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 703 | if (clp->cl_cb_xprt) |
| 704 | svc_xprt_put(clp->cl_cb_xprt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | if (clp->cl_cred.cr_group_info) |
| 706 | put_group_info(clp->cl_cred.cr_group_info); |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 707 | kfree(clp->cl_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | kfree(clp->cl_name.data); |
| 709 | kfree(clp); |
| 710 | } |
| 711 | |
| 712 | void |
| 713 | put_nfs4_client(struct nfs4_client *clp) |
| 714 | { |
| 715 | if (atomic_dec_and_test(&clp->cl_count)) |
| 716 | free_client(clp); |
| 717 | } |
| 718 | |
| 719 | static void |
| 720 | expire_client(struct nfs4_client *clp) |
| 721 | { |
| 722 | struct nfs4_stateowner *sop; |
| 723 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | struct list_head reaplist; |
| 725 | |
| 726 | dprintk("NFSD: expire_client cl_count %d\n", |
| 727 | atomic_read(&clp->cl_count)); |
| 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | INIT_LIST_HEAD(&reaplist); |
| 730 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 731 | while (!list_empty(&clp->cl_delegations)) { |
| 732 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 734 | dp->dl_flock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 735 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | list_move(&dp->dl_recall_lru, &reaplist); |
| 737 | } |
| 738 | spin_unlock(&recall_lock); |
| 739 | while (!list_empty(&reaplist)) { |
| 740 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 741 | list_del_init(&dp->dl_recall_lru); |
| 742 | unhash_delegation(dp); |
| 743 | } |
| 744 | list_del(&clp->cl_idhash); |
| 745 | list_del(&clp->cl_strhash); |
| 746 | list_del(&clp->cl_lru); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 747 | while (!list_empty(&clp->cl_openowners)) { |
| 748 | 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] | 749 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
Marc Eshel | c4bf786 | 2009-04-03 08:27:49 +0300 | [diff] [blame] | 751 | while (!list_empty(&clp->cl_sessions)) { |
| 752 | struct nfsd4_session *ses; |
| 753 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |
| 754 | se_perclnt); |
| 755 | release_session(ses); |
| 756 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | put_nfs4_client(clp); |
| 758 | } |
| 759 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 760 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 761 | { |
| 762 | memcpy(target->cl_verifier.data, source->data, |
| 763 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 766 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 767 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 769 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 770 | } |
| 771 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 772 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 773 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | target->cr_uid = source->cr_uid; |
| 775 | target->cr_gid = source->cr_gid; |
| 776 | target->cr_group_info = source->cr_group_info; |
| 777 | get_group_info(target->cr_group_info); |
| 778 | } |
| 779 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 780 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 781 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 782 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 786 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 787 | { |
| 788 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 792 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 793 | { |
| 794 | 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] | 795 | } |
| 796 | |
| 797 | /* XXX what about NGROUP */ |
| 798 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 799 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 800 | { |
| 801 | return cr1->cr_uid == cr2->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 804 | static void gen_clid(struct nfs4_client *clp) |
| 805 | { |
| 806 | static u32 current_clientid = 1; |
| 807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | clp->cl_clientid.cl_boot = boot_time; |
| 809 | clp->cl_clientid.cl_id = current_clientid++; |
| 810 | } |
| 811 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 812 | static void gen_confirm(struct nfs4_client *clp) |
| 813 | { |
| 814 | static u32 i; |
| 815 | u32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | p = (u32 *)clp->cl_confirm.data; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 818 | *p++ = get_seconds(); |
| 819 | *p++ = i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | } |
| 821 | |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 822 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
| 823 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
| 824 | { |
| 825 | struct nfs4_client *clp; |
| 826 | struct sockaddr *sa = svc_addr(rqstp); |
| 827 | char *princ; |
| 828 | |
| 829 | clp = alloc_client(name); |
| 830 | if (clp == NULL) |
| 831 | return NULL; |
| 832 | |
| 833 | princ = svc_gss_principal(rqstp); |
| 834 | if (princ) { |
| 835 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); |
| 836 | if (clp->cl_principal == NULL) { |
| 837 | free_client(clp); |
| 838 | return NULL; |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
| 843 | atomic_set(&clp->cl_count, 1); |
| 844 | atomic_set(&clp->cl_cb_conn.cb_set, 0); |
| 845 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 846 | INIT_LIST_HEAD(&clp->cl_strhash); |
| 847 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 848 | INIT_LIST_HEAD(&clp->cl_delegations); |
| 849 | INIT_LIST_HEAD(&clp->cl_sessions); |
| 850 | INIT_LIST_HEAD(&clp->cl_lru); |
| 851 | clear_bit(0, &clp->cl_cb_slot_busy); |
| 852 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); |
| 853 | copy_verf(clp, verf); |
| 854 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); |
| 855 | clp->cl_flavor = rqstp->rq_flavor; |
| 856 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
| 857 | gen_confirm(clp); |
| 858 | |
| 859 | return clp; |
| 860 | } |
| 861 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 862 | static int check_name(struct xdr_netobj name) |
| 863 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | if (name.len == 0) |
| 865 | return 0; |
| 866 | if (name.len > NFS4_OPAQUE_LIMIT) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 867 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | return 0; |
| 869 | } |
| 870 | return 1; |
| 871 | } |
| 872 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 873 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 875 | { |
| 876 | unsigned int idhashval; |
| 877 | |
| 878 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 879 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 880 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
| 881 | list_add_tail(&clp->cl_lru, &client_lru); |
| 882 | clp->cl_time = get_seconds(); |
| 883 | } |
| 884 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 885 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | move_to_confirmed(struct nfs4_client *clp) |
| 887 | { |
| 888 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 889 | unsigned int strhashval; |
| 890 | |
| 891 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
| 892 | list_del_init(&clp->cl_strhash); |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 893 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 894 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
| 896 | renew_client(clp); |
| 897 | } |
| 898 | |
| 899 | static struct nfs4_client * |
| 900 | find_confirmed_client(clientid_t *clid) |
| 901 | { |
| 902 | struct nfs4_client *clp; |
| 903 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 904 | |
| 905 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 906 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | return clp; |
| 908 | } |
| 909 | return NULL; |
| 910 | } |
| 911 | |
| 912 | static struct nfs4_client * |
| 913 | find_unconfirmed_client(clientid_t *clid) |
| 914 | { |
| 915 | struct nfs4_client *clp; |
| 916 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 917 | |
| 918 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 919 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | return clp; |
| 921 | } |
| 922 | return NULL; |
| 923 | } |
| 924 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 925 | /* |
| 926 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id |
| 927 | * parameter. Matching is based on the fact the at least one of the |
| 928 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 |
| 929 | * |
| 930 | * FIXME: we need to unify the clientid namespaces for nfsv4.x |
| 931 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID |
| 932 | * and SET_CLIENTID{,_CONFIRM} |
| 933 | */ |
| 934 | static inline int |
| 935 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) |
| 936 | { |
| 937 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); |
| 938 | return use_exchange_id == has_exchange_flags; |
| 939 | } |
| 940 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 941 | static struct nfs4_client * |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 942 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
| 943 | bool use_exchange_id) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 944 | { |
| 945 | struct nfs4_client *clp; |
| 946 | |
| 947 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 948 | if (same_name(clp->cl_recdir, dname) && |
| 949 | match_clientid_establishment(clp, use_exchange_id)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 950 | return clp; |
| 951 | } |
| 952 | return NULL; |
| 953 | } |
| 954 | |
| 955 | static struct nfs4_client * |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 956 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
| 957 | bool use_exchange_id) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 958 | { |
| 959 | struct nfs4_client *clp; |
| 960 | |
| 961 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 962 | if (same_name(clp->cl_recdir, dname) && |
| 963 | match_clientid_establishment(clp, use_exchange_id)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 964 | return clp; |
| 965 | } |
| 966 | return NULL; |
| 967 | } |
| 968 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 969 | static void |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 970 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | { |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 972 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 973 | unsigned short expected_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 975 | /* Currently, we only support tcp and tcp6 for the callback channel */ |
| 976 | if (se->se_callback_netid_len == 3 && |
| 977 | !memcmp(se->se_callback_netid_val, "tcp", 3)) |
| 978 | expected_family = AF_INET; |
| 979 | else if (se->se_callback_netid_len == 4 && |
| 980 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) |
| 981 | expected_family = AF_INET6; |
| 982 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | goto out_err; |
| 984 | |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 985 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
| 986 | se->se_callback_addr_len, |
| 987 | (struct sockaddr *) &cb->cb_addr, |
| 988 | sizeof(cb->cb_addr)); |
| 989 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 990 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | goto out_err; |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 992 | |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 993 | if (cb->cb_addr.ss_family == AF_INET6) |
| 994 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; |
| 995 | |
Andy Adamson | ab52ae6 | 2009-06-16 04:20:53 +0300 | [diff] [blame] | 996 | cb->cb_minorversion = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | cb->cb_prog = se->se_callback_prog; |
| 998 | cb->cb_ident = se->se_callback_ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | return; |
| 1000 | out_err: |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1001 | cb->cb_addr.ss_family = AF_UNSPEC; |
| 1002 | cb->cb_addrlen = 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1003 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | "will not receive delegations\n", |
| 1005 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | return; |
| 1008 | } |
| 1009 | |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1010 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1011 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1012 | */ |
| 1013 | void |
| 1014 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
| 1015 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1016 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 1017 | unsigned int base; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1018 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1019 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1020 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1021 | slot->sl_opcnt = resp->opcnt; |
| 1022 | slot->sl_status = resp->cstate.status; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1023 | |
| 1024 | if (nfsd4_not_cached(resp)) { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1025 | slot->sl_datalen = 0; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1026 | return; |
| 1027 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1028 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
| 1029 | base = (char *)resp->cstate.datap - |
| 1030 | (char *)resp->xbuf->head[0].iov_base; |
| 1031 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, |
| 1032 | slot->sl_datalen)) |
| 1033 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
| 1034 | return; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | /* |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1038 | * Encode the replay sequence operation from the slot values. |
| 1039 | * If cachethis is FALSE encode the uncached rep error on the next |
| 1040 | * operation which sets resp->p and increments resp->opcnt for |
| 1041 | * nfs4svc_encode_compoundres. |
| 1042 | * |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1043 | */ |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1044 | static __be32 |
| 1045 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, |
| 1046 | struct nfsd4_compoundres *resp) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1047 | { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1048 | struct nfsd4_op *op; |
| 1049 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1050 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1051 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1052 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1053 | |
| 1054 | /* Encode the replayed sequence operation */ |
| 1055 | op = &args->ops[resp->opcnt - 1]; |
| 1056 | nfsd4_encode_operation(resp, op); |
| 1057 | |
| 1058 | /* Return nfserr_retry_uncached_rep in next operation. */ |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1059 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1060 | op = &args->ops[resp->opcnt++]; |
| 1061 | op->status = nfserr_retry_uncached_rep; |
| 1062 | nfsd4_encode_operation(resp, op); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1063 | } |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1064 | return op->status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1068 | * The sequence operation is not cached because we can use the slot and |
| 1069 | * session values. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1070 | */ |
| 1071 | __be32 |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1072 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
| 1073 | struct nfsd4_sequence *seq) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1074 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1075 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1076 | __be32 status; |
| 1077 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1078 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1079 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1080 | /* Either returns 0 or nfserr_retry_uncached */ |
| 1081 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
| 1082 | if (status == nfserr_retry_uncached_rep) |
| 1083 | return status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1084 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1085 | /* The sequence operation has been encoded, cstate->datap set. */ |
| 1086 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1087 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1088 | resp->opcnt = slot->sl_opcnt; |
| 1089 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); |
| 1090 | status = slot->sl_status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1091 | |
| 1092 | return status; |
| 1093 | } |
| 1094 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1095 | /* |
| 1096 | * Set the exchange_id flags returned by the server. |
| 1097 | */ |
| 1098 | static void |
| 1099 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) |
| 1100 | { |
| 1101 | /* pNFS is not supported */ |
| 1102 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
| 1103 | |
| 1104 | /* Referrals are supported, Migration is not. */ |
| 1105 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; |
| 1106 | |
| 1107 | /* set the wire flags to return to client. */ |
| 1108 | clid->flags = new->cl_exchange_flags; |
| 1109 | } |
| 1110 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1111 | __be32 |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1112 | nfsd4_exchange_id(struct svc_rqst *rqstp, |
| 1113 | struct nfsd4_compound_state *cstate, |
| 1114 | struct nfsd4_exchange_id *exid) |
| 1115 | { |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1116 | struct nfs4_client *unconf, *conf, *new; |
| 1117 | int status; |
| 1118 | unsigned int strhashval; |
| 1119 | char dname[HEXDIR_LEN]; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1120 | char addr_str[INET6_ADDRSTRLEN]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1121 | nfs4_verifier verf = exid->verifier; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1122 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1123 | |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1124 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1125 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1126 | "ip_addr=%s flags %x, spa_how %d\n", |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1127 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1128 | addr_str, exid->flags, exid->spa_how); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1129 | |
| 1130 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) |
| 1131 | return nfserr_inval; |
| 1132 | |
| 1133 | /* Currently only support SP4_NONE */ |
| 1134 | switch (exid->spa_how) { |
| 1135 | case SP4_NONE: |
| 1136 | break; |
| 1137 | case SP4_SSV: |
| 1138 | return nfserr_encr_alg_unsupp; |
| 1139 | default: |
| 1140 | BUG(); /* checked by xdr code */ |
| 1141 | case SP4_MACH_CRED: |
| 1142 | return nfserr_serverfault; /* no excuse :-/ */ |
| 1143 | } |
| 1144 | |
| 1145 | status = nfs4_make_rec_clidname(dname, &exid->clname); |
| 1146 | |
| 1147 | if (status) |
| 1148 | goto error; |
| 1149 | |
| 1150 | strhashval = clientstr_hashval(dname); |
| 1151 | |
| 1152 | nfs4_lock_state(); |
| 1153 | status = nfs_ok; |
| 1154 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1155 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1156 | if (conf) { |
| 1157 | if (!same_verf(&verf, &conf->cl_verifier)) { |
| 1158 | /* 18.35.4 case 8 */ |
| 1159 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1160 | status = nfserr_not_same; |
| 1161 | goto out; |
| 1162 | } |
| 1163 | /* Client reboot: destroy old state */ |
| 1164 | expire_client(conf); |
| 1165 | goto out_new; |
| 1166 | } |
| 1167 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
| 1168 | /* 18.35.4 case 9 */ |
| 1169 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1170 | status = nfserr_perm; |
| 1171 | goto out; |
| 1172 | } |
| 1173 | expire_client(conf); |
| 1174 | goto out_new; |
| 1175 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1176 | /* |
| 1177 | * Set bit when the owner id and verifier map to an already |
| 1178 | * confirmed client id (18.35.3). |
| 1179 | */ |
| 1180 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; |
| 1181 | |
| 1182 | /* |
| 1183 | * Falling into 18.35.4 case 2, possible router replay. |
| 1184 | * Leave confirmed record intact and return same result. |
| 1185 | */ |
| 1186 | copy_verf(conf, &verf); |
| 1187 | new = conf; |
| 1188 | goto out_copy; |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 1189 | } |
| 1190 | |
| 1191 | /* 18.35.4 case 7 */ |
| 1192 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1193 | status = nfserr_noent; |
| 1194 | goto out; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1195 | } |
| 1196 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1197 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1198 | if (unconf) { |
| 1199 | /* |
| 1200 | * Possible retry or client restart. Per 18.35.4 case 4, |
| 1201 | * a new unconfirmed record should be generated regardless |
| 1202 | * of whether any properties have changed. |
| 1203 | */ |
| 1204 | expire_client(unconf); |
| 1205 | } |
| 1206 | |
| 1207 | out_new: |
| 1208 | /* Normal case */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1209 | new = create_client(exid->clname, dname, rqstp, &verf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1210 | if (new == NULL) { |
Andy Adamson | bdac86e | 2009-08-28 08:45:03 -0400 | [diff] [blame] | 1211 | status = nfserr_serverfault; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1212 | goto out; |
| 1213 | } |
| 1214 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1215 | gen_clid(new); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1216 | add_to_unconfirmed(new, strhashval); |
| 1217 | out_copy: |
| 1218 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1219 | exid->clientid.cl_id = new->cl_clientid.cl_id; |
| 1220 | |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1221 | exid->seqid = 1; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1222 | nfsd4_set_ex_flags(new, exid); |
| 1223 | |
| 1224 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1225 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1226 | status = nfs_ok; |
| 1227 | |
| 1228 | out: |
| 1229 | nfs4_unlock_state(); |
| 1230 | error: |
| 1231 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); |
| 1232 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1233 | } |
| 1234 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1235 | static int |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1236 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1237 | { |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1238 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
| 1239 | slot_seqid); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1240 | |
| 1241 | /* The slot is in use, and no response has been sent. */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1242 | if (slot_inuse) { |
| 1243 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1244 | return nfserr_jukebox; |
| 1245 | else |
| 1246 | return nfserr_seq_misordered; |
| 1247 | } |
| 1248 | /* Normal */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1249 | if (likely(seqid == slot_seqid + 1)) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1250 | return nfs_ok; |
| 1251 | /* Replay */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1252 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1253 | return nfserr_replay_cache; |
| 1254 | /* Wraparound */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1255 | if (seqid == 1 && (slot_seqid + 1) == 0) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1256 | return nfs_ok; |
| 1257 | /* Misordered replay or misordered new request */ |
| 1258 | return nfserr_seq_misordered; |
| 1259 | } |
| 1260 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1261 | /* |
| 1262 | * Cache the create session result into the create session single DRC |
| 1263 | * slot cache by saving the xdr structure. sl_seqid has been set. |
| 1264 | * Do this for solo or embedded create session operations. |
| 1265 | */ |
| 1266 | static void |
| 1267 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, |
| 1268 | struct nfsd4_clid_slot *slot, int nfserr) |
| 1269 | { |
| 1270 | slot->sl_status = nfserr; |
| 1271 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); |
| 1272 | } |
| 1273 | |
| 1274 | static __be32 |
| 1275 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, |
| 1276 | struct nfsd4_clid_slot *slot) |
| 1277 | { |
| 1278 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); |
| 1279 | return slot->sl_status; |
| 1280 | } |
| 1281 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1282 | __be32 |
| 1283 | nfsd4_create_session(struct svc_rqst *rqstp, |
| 1284 | struct nfsd4_compound_state *cstate, |
| 1285 | struct nfsd4_create_session *cr_ses) |
| 1286 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1287 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1288 | struct nfs4_client *conf, *unconf; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1289 | struct nfsd4_clid_slot *cs_slot = NULL; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1290 | int status = 0; |
| 1291 | |
| 1292 | nfs4_lock_state(); |
| 1293 | unconf = find_unconfirmed_client(&cr_ses->clientid); |
| 1294 | conf = find_confirmed_client(&cr_ses->clientid); |
| 1295 | |
| 1296 | if (conf) { |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1297 | cs_slot = &conf->cl_cs_slot; |
| 1298 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1299 | if (status == nfserr_replay_cache) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1300 | dprintk("Got a create_session replay! seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1301 | cs_slot->sl_seqid); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1302 | /* Return the cached reply status */ |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1303 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1304 | goto out; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1305 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1306 | status = nfserr_seq_misordered; |
| 1307 | dprintk("Sequence misordered!\n"); |
| 1308 | dprintk("Expected seqid= %d but got seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1309 | cs_slot->sl_seqid, cr_ses->seqid); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1310 | goto out; |
| 1311 | } |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1312 | cs_slot->sl_seqid++; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1313 | } else if (unconf) { |
| 1314 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1315 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1316 | status = nfserr_clid_inuse; |
| 1317 | goto out; |
| 1318 | } |
| 1319 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1320 | cs_slot = &unconf->cl_cs_slot; |
| 1321 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1322 | if (status) { |
| 1323 | /* an unconfirmed replay returns misordered */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1324 | status = nfserr_seq_misordered; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1325 | goto out_cache; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1326 | } |
| 1327 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1328 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1329 | move_to_confirmed(unconf); |
| 1330 | |
| 1331 | /* |
| 1332 | * We do not support RDMA or persistent sessions |
| 1333 | */ |
| 1334 | cr_ses->flags &= ~SESSION4_PERSIST; |
| 1335 | cr_ses->flags &= ~SESSION4_RDMA; |
| 1336 | |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 1337 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
| 1338 | unconf->cl_cb_xprt = rqstp->rq_xprt; |
| 1339 | svc_xprt_get(unconf->cl_cb_xprt); |
| 1340 | rpc_copy_addr( |
| 1341 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, |
| 1342 | sa); |
| 1343 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); |
| 1344 | unconf->cl_cb_conn.cb_minorversion = |
| 1345 | cstate->minorversion; |
| 1346 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; |
Ricardo Labiaga | 2a1d1b5 | 2009-09-10 12:26:38 +0300 | [diff] [blame] | 1347 | unconf->cl_cb_seq_nr = 1; |
Andy Adamson | 38524ab | 2009-09-10 12:25:59 +0300 | [diff] [blame] | 1348 | nfsd4_probe_callback(unconf); |
| 1349 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1350 | conf = unconf; |
| 1351 | } else { |
| 1352 | status = nfserr_stale_clientid; |
| 1353 | goto out; |
| 1354 | } |
| 1355 | |
| 1356 | status = alloc_init_session(rqstp, conf, cr_ses); |
| 1357 | if (status) |
| 1358 | goto out; |
| 1359 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1360 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
| 1361 | NFS4_MAX_SESSIONID_LEN); |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1362 | cr_ses->seqid = cs_slot->sl_seqid; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1363 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1364 | out_cache: |
| 1365 | /* cache solo and embedded create sessions under the state lock */ |
| 1366 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1367 | out: |
| 1368 | nfs4_unlock_state(); |
| 1369 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1370 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | __be32 |
| 1374 | nfsd4_destroy_session(struct svc_rqst *r, |
| 1375 | struct nfsd4_compound_state *cstate, |
| 1376 | struct nfsd4_destroy_session *sessionid) |
| 1377 | { |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1378 | struct nfsd4_session *ses; |
| 1379 | u32 status = nfserr_badsession; |
| 1380 | |
| 1381 | /* Notes: |
| 1382 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid |
| 1383 | * - Should we return nfserr_back_chan_busy if waiting for |
| 1384 | * callbacks on to-be-destroyed session? |
| 1385 | * - Do we need to clear any callback info from previous session? |
| 1386 | */ |
| 1387 | |
| 1388 | dump_sessionid(__func__, &sessionid->sessionid); |
| 1389 | spin_lock(&sessionid_lock); |
| 1390 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
| 1391 | if (!ses) { |
| 1392 | spin_unlock(&sessionid_lock); |
| 1393 | goto out; |
| 1394 | } |
| 1395 | |
| 1396 | unhash_session(ses); |
| 1397 | spin_unlock(&sessionid_lock); |
| 1398 | |
| 1399 | /* wait for callbacks */ |
| 1400 | shutdown_callback_client(ses->se_client); |
| 1401 | nfsd4_put_session(ses); |
| 1402 | status = nfs_ok; |
| 1403 | out: |
| 1404 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1405 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | __be32 |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1409 | nfsd4_sequence(struct svc_rqst *rqstp, |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1410 | struct nfsd4_compound_state *cstate, |
| 1411 | struct nfsd4_sequence *seq) |
| 1412 | { |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1413 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1414 | struct nfsd4_session *session; |
| 1415 | struct nfsd4_slot *slot; |
| 1416 | int status; |
| 1417 | |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1418 | if (resp->opcnt != 1) |
| 1419 | return nfserr_sequence_pos; |
| 1420 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1421 | spin_lock(&sessionid_lock); |
| 1422 | status = nfserr_badsession; |
| 1423 | session = find_in_sessionid_hashtbl(&seq->sessionid); |
| 1424 | if (!session) |
| 1425 | goto out; |
| 1426 | |
| 1427 | status = nfserr_badslot; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 1428 | if (seq->slotid >= session->se_fchannel.maxreqs) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1429 | goto out; |
| 1430 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1431 | slot = session->se_slots[seq->slotid]; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1432 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
| 1433 | |
Andy Adamson | a8dfdae | 2009-08-28 08:45:02 -0400 | [diff] [blame] | 1434 | /* We do not negotiate the number of slots yet, so set the |
| 1435 | * maxslots to the session maxreqs which is used to encode |
| 1436 | * sr_highest_slotid and the sr_target_slot id to maxslots */ |
| 1437 | seq->maxslots = session->se_fchannel.maxreqs; |
| 1438 | |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1439 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1440 | if (status == nfserr_replay_cache) { |
| 1441 | cstate->slot = slot; |
| 1442 | cstate->session = session; |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1443 | /* Return the cached reply status and set cstate->status |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1444 | * for nfsd4_proc_compound processing */ |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1445 | status = nfsd4_replay_cache_entry(resp, seq); |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1446 | cstate->status = nfserr_replay_cache; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1447 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1448 | } |
| 1449 | if (status) |
| 1450 | goto out; |
| 1451 | |
| 1452 | /* Success! bump slot seqid */ |
| 1453 | slot->sl_inuse = true; |
| 1454 | slot->sl_seqid = seq->seqid; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1455 | slot->sl_cachethis = seq->cachethis; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1456 | |
| 1457 | cstate->slot = slot; |
| 1458 | cstate->session = session; |
| 1459 | |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1460 | /* Hold a session reference until done processing the compound: |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1461 | * nfsd4_put_session called only if the cstate slot is set. |
| 1462 | */ |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1463 | nfsd4_get_session(session); |
| 1464 | out: |
| 1465 | spin_unlock(&sessionid_lock); |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1466 | /* Renew the clientid on success and on replay */ |
| 1467 | if (cstate->session) { |
| 1468 | nfs4_lock_state(); |
| 1469 | renew_client(session->se_client); |
| 1470 | nfs4_unlock_state(); |
| 1471 | } |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1472 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
| 1473 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1474 | } |
| 1475 | |
| 1476 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1477 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1478 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1480 | struct sockaddr *sa = svc_addr(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | struct xdr_netobj clname = { |
| 1482 | .len = setclid->se_namelen, |
| 1483 | .data = setclid->se_name, |
| 1484 | }; |
| 1485 | nfs4_verifier clverifier = setclid->se_verf; |
| 1486 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1487 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1488 | __be32 status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1489 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | if (!check_name(clname)) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 1492 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1494 | status = nfs4_make_rec_clidname(dname, &clname); |
| 1495 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 1496 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | /* |
| 1499 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 1500 | * We get here on a DRC miss. |
| 1501 | */ |
| 1502 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1503 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | nfs4_lock_state(); |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1506 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1507 | if (conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1508 | /* RFC 3530 14.2.33 CASE 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | status = nfserr_clid_inuse; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 1510 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1511 | char addr_str[INET6_ADDRSTRLEN]; |
| 1512 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, |
| 1513 | sizeof(addr_str)); |
| 1514 | dprintk("NFSD: setclientid: string in use by client " |
| 1515 | "at %s\n", addr_str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | goto out; |
| 1517 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | } |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1519 | /* |
| 1520 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") |
| 1521 | * has a description of SETCLIENTID request processing consisting |
| 1522 | * of 5 bullet points, labeled as CASE0 - CASE4 below. |
| 1523 | */ |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1524 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | status = nfserr_resource; |
| 1526 | if (!conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1527 | /* |
| 1528 | * RFC 3530 14.2.33 CASE 4: |
| 1529 | * placed first, because it is the normal case |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | */ |
| 1531 | if (unconf) |
| 1532 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1533 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1534 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | gen_clid(new); |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1537 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1539 | * RFC 3530 14.2.33 CASE 1: |
| 1540 | * probable callback update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 1542 | if (unconf) { |
| 1543 | /* Note this is removing unconfirmed {*x***}, |
| 1544 | * which is stronger than RFC recommended {vxc**}. |
| 1545 | * This has the advantage that there is at most |
| 1546 | * one {*x***} in either list at any time. |
| 1547 | */ |
| 1548 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | } |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1550 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1551 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | copy_clid(new, conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | } else if (!unconf) { |
| 1555 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1556 | * RFC 3530 14.2.33 CASE 2: |
| 1557 | * probable client reboot; state will be removed if |
| 1558 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1560 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1561 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | gen_clid(new); |
J. Bruce Fields | 49ba878 | 2007-11-19 19:09:50 -0500 | [diff] [blame] | 1564 | } else { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1565 | /* |
| 1566 | * RFC 3530 14.2.33 CASE 3: |
| 1567 | * probable client reboot; state will be removed if |
| 1568 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | */ |
| 1570 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1571 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1572 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | gen_clid(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | } |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 1576 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 1577 | add_to_unconfirmed(new, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1579 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 1580 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 1581 | status = nfs_ok; |
| 1582 | out: |
| 1583 | nfs4_unlock_state(); |
| 1584 | return status; |
| 1585 | } |
| 1586 | |
| 1587 | |
| 1588 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1589 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
| 1590 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 |
| 1591 | * bullets, labeled as CASE1 - CASE4 below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1593 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1594 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 1595 | struct nfsd4_compound_state *cstate, |
| 1596 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1598 | struct sockaddr *sa = svc_addr(rqstp); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1599 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 1601 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1602 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | |
| 1604 | if (STALE_CLIENTID(clid)) |
| 1605 | return nfserr_stale_clientid; |
| 1606 | /* |
| 1607 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 1608 | * We get here on a DRC miss. |
| 1609 | */ |
| 1610 | |
| 1611 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1612 | |
| 1613 | conf = find_confirmed_client(clid); |
| 1614 | unconf = find_unconfirmed_client(clid); |
| 1615 | |
| 1616 | status = nfserr_clid_inuse; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1617 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1618 | goto out; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1619 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1620 | goto out; |
| 1621 | |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1622 | /* |
| 1623 | * section 14.2.34 of RFC 3530 has a description of |
| 1624 | * SETCLIENTID_CONFIRM request processing consisting |
| 1625 | * of 4 bullet points, labeled as CASE1 - CASE4 below. |
| 1626 | */ |
J. Bruce Fields | 366e0c1 | 2007-11-20 15:54:10 -0500 | [diff] [blame] | 1627 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1628 | /* |
| 1629 | * RFC 3530 14.2.34 CASE 1: |
| 1630 | * callback update |
| 1631 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1632 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | status = nfserr_clid_inuse; |
| 1634 | else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1635 | /* XXX: We just turn off callbacks until we can handle |
| 1636 | * change request correctly. */ |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 1637 | atomic_set(&conf->cl_cb_conn.cb_set, 0); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1638 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | } |
J. Bruce Fields | f3aba4e | 2007-11-20 16:52:07 -0500 | [diff] [blame] | 1642 | } else if (conf && !unconf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1643 | /* |
| 1644 | * RFC 3530 14.2.34 CASE 2: |
| 1645 | * probable retransmitted request; play it safe and |
| 1646 | * do nothing. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1647 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1648 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1650 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1652 | } else if (!conf && unconf |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1653 | && same_verf(&unconf->cl_confirm, &confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1654 | /* |
| 1655 | * RFC 3530 14.2.34 CASE 3: |
| 1656 | * Normal case; new or rebooted client: |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1657 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1658 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | status = nfserr_clid_inuse; |
| 1660 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1661 | unsigned int hash = |
| 1662 | clientstr_hashval(unconf->cl_recdir); |
| 1663 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1664 | hash, false); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1665 | if (conf) { |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1666 | nfsd4_remove_clid_dir(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1667 | expire_client(conf); |
| 1668 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 1670 | conf = unconf; |
J. Bruce Fields | 46f8a64 | 2007-11-22 13:54:18 -0500 | [diff] [blame] | 1671 | nfsd4_probe_callback(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 1672 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | } |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1674 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
| 1675 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1676 | &confirm)))) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 1677 | /* |
| 1678 | * RFC 3530 14.2.34 CASE 4: |
| 1679 | * Client probably hasn't noticed that we rebooted yet. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1680 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 1682 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 1683 | /* check that we have hit one of the cases...*/ |
| 1684 | status = nfserr_clid_inuse; |
| 1685 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | nfs4_unlock_state(); |
| 1688 | return status; |
| 1689 | } |
| 1690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | /* OPEN Share state helper functions */ |
| 1692 | static inline struct nfs4_file * |
| 1693 | alloc_init_file(struct inode *ino) |
| 1694 | { |
| 1695 | struct nfs4_file *fp; |
| 1696 | unsigned int hashval = file_hashval(ino); |
| 1697 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1698 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 1699 | if (fp) { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1700 | atomic_set(&fp->fi_ref, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1702 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 1703 | INIT_LIST_HEAD(&fp->fi_delegations); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1704 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1706 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | fp->fi_inode = igrab(ino); |
| 1708 | fp->fi_id = current_fileid++; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1709 | fp->fi_had_conflict = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | return fp; |
| 1711 | } |
| 1712 | return NULL; |
| 1713 | } |
| 1714 | |
| 1715 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 1716 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1717 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1718 | if (*slab == NULL) |
| 1719 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1720 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1721 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1722 | } |
| 1723 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1724 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1725 | nfsd4_free_slabs(void) |
| 1726 | { |
| 1727 | nfsd4_free_slab(&stateowner_slab); |
| 1728 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1729 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1730 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1731 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
| 1733 | static int |
| 1734 | nfsd4_init_slabs(void) |
| 1735 | { |
| 1736 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1737 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1738 | if (stateowner_slab == NULL) |
| 1739 | goto out_nomem; |
| 1740 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1741 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1742 | if (file_slab == NULL) |
| 1743 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1744 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1745 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1746 | if (stateid_slab == NULL) |
| 1747 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1748 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1749 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1750 | if (deleg_slab == NULL) |
| 1751 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1753 | out_nomem: |
| 1754 | nfsd4_free_slabs(); |
| 1755 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1756 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | } |
| 1758 | |
| 1759 | void |
| 1760 | nfs4_free_stateowner(struct kref *kref) |
| 1761 | { |
| 1762 | struct nfs4_stateowner *sop = |
| 1763 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1764 | kfree(sop->so_owner.data); |
| 1765 | kmem_cache_free(stateowner_slab, sop); |
| 1766 | } |
| 1767 | |
| 1768 | static inline struct nfs4_stateowner * |
| 1769 | alloc_stateowner(struct xdr_netobj *owner) |
| 1770 | { |
| 1771 | struct nfs4_stateowner *sop; |
| 1772 | |
| 1773 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1774 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1775 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1776 | sop->so_owner.len = owner->len; |
| 1777 | kref_init(&sop->so_ref); |
| 1778 | return sop; |
| 1779 | } |
| 1780 | kmem_cache_free(stateowner_slab, sop); |
| 1781 | } |
| 1782 | return NULL; |
| 1783 | } |
| 1784 | |
| 1785 | static struct nfs4_stateowner * |
| 1786 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1787 | struct nfs4_stateowner *sop; |
| 1788 | struct nfs4_replay *rp; |
| 1789 | unsigned int idhashval; |
| 1790 | |
| 1791 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1792 | return NULL; |
| 1793 | idhashval = ownerid_hashval(current_ownerid); |
| 1794 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1795 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1796 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1797 | INIT_LIST_HEAD(&sop->so_stateids); |
| 1798 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1800 | sop->so_time = 0; |
| 1801 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1802 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1803 | list_add(&sop->so_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | sop->so_is_open_owner = 1; |
| 1805 | sop->so_id = current_ownerid++; |
| 1806 | sop->so_client = clp; |
| 1807 | sop->so_seqid = open->op_seqid; |
| 1808 | sop->so_confirmed = 0; |
| 1809 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 1810 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | rp->rp_buflen = 0; |
| 1812 | rp->rp_buf = rp->rp_ibuf; |
| 1813 | return sop; |
| 1814 | } |
| 1815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | static inline void |
| 1817 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1818 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1819 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1820 | |
| 1821 | INIT_LIST_HEAD(&stp->st_hash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1822 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 1823 | INIT_LIST_HEAD(&stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1825 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1826 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1827 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1829 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | stp->st_file = fp; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 1831 | stp->st_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1833 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1834 | stp->st_stateid.si_generation = 0; |
| 1835 | stp->st_access_bmap = 0; |
| 1836 | stp->st_deny_bmap = 0; |
Andy Adamson | 84459a1 | 2009-04-03 08:28:56 +0300 | [diff] [blame] | 1837 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
| 1838 | &stp->st_access_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 1840 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | } |
| 1842 | |
| 1843 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1845 | { |
| 1846 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1847 | |
NeilBrown | 358dd55 | 2006-04-10 22:55:42 -0700 | [diff] [blame] | 1848 | list_move_tail(&sop->so_close_lru, &close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | sop->so_time = get_seconds(); |
| 1850 | } |
| 1851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1853 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 1854 | clientid_t *clid) |
| 1855 | { |
| 1856 | return (sop->so_owner.len == owner->len) && |
| 1857 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1858 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
| 1861 | static struct nfs4_stateowner * |
| 1862 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1863 | { |
| 1864 | struct nfs4_stateowner *so = NULL; |
| 1865 | |
| 1866 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1867 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | return so; |
| 1869 | } |
| 1870 | return NULL; |
| 1871 | } |
| 1872 | |
| 1873 | /* search file_hashtbl[] for file */ |
| 1874 | static struct nfs4_file * |
| 1875 | find_file(struct inode *ino) |
| 1876 | { |
| 1877 | unsigned int hashval = file_hashval(ino); |
| 1878 | struct nfs4_file *fp; |
| 1879 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1880 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1882 | if (fp->fi_inode == ino) { |
| 1883 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1884 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1886 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | } |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1888 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | return NULL; |
| 1890 | } |
| 1891 | |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1892 | static inline int access_valid(u32 x, u32 minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1893 | { |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1894 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1895 | return 0; |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 1896 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
| 1897 | return 0; |
| 1898 | x &= ~NFS4_SHARE_ACCESS_MASK; |
| 1899 | if (minorversion && x) { |
| 1900 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) |
| 1901 | return 0; |
| 1902 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) |
| 1903 | return 0; |
| 1904 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); |
| 1905 | } |
| 1906 | if (x) |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1907 | return 0; |
| 1908 | return 1; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1909 | } |
| 1910 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1911 | static inline int deny_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1912 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1913 | /* Note: unlike access bits, deny bits may be zero. */ |
| 1914 | return x <= NFS4_SHARE_DENY_BOTH; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1915 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 1917 | /* |
| 1918 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 1919 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 1920 | * only what share bits are currently in force, but also what |
| 1921 | * combinations of share bits previous opens have used. This allows us |
| 1922 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 1923 | * return an error if the client attempt to downgrade to a combination |
| 1924 | * of share bits not explicable by closing some of its previous opens. |
| 1925 | * |
| 1926 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 1927 | * track of access/deny bit combinations; so, e.g., we allow: |
| 1928 | * |
| 1929 | * OPEN allow read, deny write |
| 1930 | * OPEN allow both, deny none |
| 1931 | * DOWNGRADE allow read, deny none |
| 1932 | * |
| 1933 | * which we should reject. |
| 1934 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1935 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | set_access(unsigned int *access, unsigned long bmap) { |
| 1937 | int i; |
| 1938 | |
| 1939 | *access = 0; |
| 1940 | for (i = 1; i < 4; i++) { |
| 1941 | if (test_bit(i, &bmap)) |
| 1942 | *access |= i; |
| 1943 | } |
| 1944 | } |
| 1945 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1946 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1948 | int i; |
| 1949 | |
| 1950 | *deny = 0; |
| 1951 | for (i = 0; i < 4; i++) { |
| 1952 | if (test_bit(i, &bmap)) |
| 1953 | *deny |= i ; |
| 1954 | } |
| 1955 | } |
| 1956 | |
| 1957 | static int |
| 1958 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1959 | unsigned int access, deny; |
| 1960 | |
| 1961 | set_access(&access, stp->st_access_bmap); |
| 1962 | set_deny(&deny, stp->st_deny_bmap); |
| 1963 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1964 | return 0; |
| 1965 | return 1; |
| 1966 | } |
| 1967 | |
| 1968 | /* |
| 1969 | * Called to check deny when READ with all zero stateid or |
| 1970 | * WRITE with all zero or all one stateid |
| 1971 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1972 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1974 | { |
| 1975 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1976 | struct nfs4_file *fp; |
| 1977 | struct nfs4_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1978 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | |
| 1980 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 1981 | |
| 1982 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1983 | if (!fp) |
| 1984 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 1985 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1987 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 1988 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 1989 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 1990 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1992 | ret = nfs_ok; |
| 1993 | out: |
| 1994 | put_nfs4_file(fp); |
| 1995 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | } |
| 1997 | |
| 1998 | static inline void |
| 1999 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 2000 | { |
| 2001 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 2002 | drop_file_write_access(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
| 2004 | } |
| 2005 | } |
| 2006 | |
| 2007 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | * Spawn a thread to perform a recall on the delegation represented |
| 2009 | * by the lease (file_lock) |
| 2010 | * |
| 2011 | * Called from break_lease() with lock_kernel() held. |
| 2012 | * Note: we assume break_lease will only call this *once* for any given |
| 2013 | * lease. |
| 2014 | */ |
| 2015 | static |
| 2016 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 2017 | { |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 2018 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | |
| 2020 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 2021 | if (!dp) |
| 2022 | return; |
| 2023 | |
| 2024 | /* We're assuming the state code never drops its reference |
| 2025 | * without first removing the lease. Since we're in this lease |
| 2026 | * callback (and since the lease code is serialized by the kernel |
| 2027 | * lock) we know the server hasn't removed the lease yet, we know |
| 2028 | * it's safe to take a reference: */ |
| 2029 | atomic_inc(&dp->dl_count); |
J. Bruce Fields | cfdcad4 | 2007-09-12 20:35:15 -0400 | [diff] [blame] | 2030 | atomic_inc(&dp->dl_client->cl_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | |
| 2032 | spin_lock(&recall_lock); |
| 2033 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 2034 | spin_unlock(&recall_lock); |
| 2035 | |
| 2036 | /* only place dl_time is set. protected by lock_kernel*/ |
| 2037 | dp->dl_time = get_seconds(); |
| 2038 | |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2039 | /* |
| 2040 | * We don't want the locks code to timeout the lease for us; |
| 2041 | * we'll remove it ourself if the delegation isn't returned |
| 2042 | * in time. |
| 2043 | */ |
| 2044 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
J. Bruce Fields | 63e4863 | 2009-05-01 22:36:55 -0400 | [diff] [blame] | 2046 | dp->dl_file->fi_had_conflict = true; |
| 2047 | nfsd4_cb_recall(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | } |
| 2049 | |
| 2050 | /* |
| 2051 | * The file_lock is being reapd. |
| 2052 | * |
| 2053 | * Called by locks_free_lock() with lock_kernel() held. |
| 2054 | */ |
| 2055 | static |
| 2056 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 2057 | { |
| 2058 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 2059 | |
| 2060 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 2061 | |
| 2062 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 2063 | return; |
| 2064 | dp->dl_flock = NULL; |
| 2065 | } |
| 2066 | |
| 2067 | /* |
| 2068 | * Set the delegation file_lock back pointer. |
| 2069 | * |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2070 | * Called from setlease() with lock_kernel() held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | */ |
| 2072 | static |
| 2073 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 2074 | { |
| 2075 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 2076 | |
| 2077 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 2078 | if (!dp) |
| 2079 | return; |
| 2080 | dp->dl_flock = new; |
| 2081 | } |
| 2082 | |
| 2083 | /* |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2084 | * Called from setlease() with lock_kernel() held |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | */ |
| 2086 | static |
| 2087 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 2088 | { |
| 2089 | struct nfs4_delegation *onlistd = |
| 2090 | (struct nfs4_delegation *)onlist->fl_owner; |
| 2091 | struct nfs4_delegation *tryd = |
| 2092 | (struct nfs4_delegation *)try->fl_owner; |
| 2093 | |
| 2094 | if (onlist->fl_lmops != try->fl_lmops) |
| 2095 | return 0; |
| 2096 | |
| 2097 | return onlistd->dl_client == tryd->dl_client; |
| 2098 | } |
| 2099 | |
| 2100 | |
| 2101 | static |
| 2102 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 2103 | { |
| 2104 | if (arg & F_UNLCK) |
| 2105 | return lease_modify(onlist, arg); |
| 2106 | else |
| 2107 | return -EAGAIN; |
| 2108 | } |
| 2109 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 2110 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | .fl_break = nfsd_break_deleg_cb, |
| 2112 | .fl_release_private = nfsd_release_deleg_cb, |
| 2113 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 2114 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 2115 | .fl_change = nfsd_change_deleg_cb, |
| 2116 | }; |
| 2117 | |
| 2118 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2119 | __be32 |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2120 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
| 2121 | struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | clientid_t *clientid = &open->op_clientid; |
| 2124 | struct nfs4_client *clp = NULL; |
| 2125 | unsigned int strhashval; |
| 2126 | struct nfs4_stateowner *sop = NULL; |
| 2127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | if (!check_name(open->op_owner)) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2129 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | |
| 2131 | if (STALE_CLIENTID(&open->op_clientid)) |
| 2132 | return nfserr_stale_clientid; |
| 2133 | |
| 2134 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 2135 | sop = find_openstateowner_str(strhashval, open); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2136 | open->op_stateowner = sop; |
| 2137 | if (!sop) { |
| 2138 | /* Make sure the client's lease hasn't expired. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | clp = find_confirmed_client(clientid); |
| 2140 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2141 | return nfserr_expired; |
| 2142 | goto renew; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2144 | /* When sessions are used, skip open sequenceid processing */ |
| 2145 | if (nfsd4_has_session(cstate)) |
| 2146 | goto renew; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2147 | if (!sop->so_confirmed) { |
| 2148 | /* Replace unconfirmed owners without checking for replay. */ |
| 2149 | clp = sop->so_client; |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2150 | release_openowner(sop); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2151 | open->op_stateowner = NULL; |
| 2152 | goto renew; |
| 2153 | } |
| 2154 | if (open->op_seqid == sop->so_seqid - 1) { |
| 2155 | if (sop->so_replay.rp_buflen) |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 2156 | return nfserr_replay_me; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2157 | /* The original OPEN failed so spectacularly |
| 2158 | * that we don't even have replay data saved! |
| 2159 | * Therefore, we have no choice but to continue |
| 2160 | * processing this OPEN; presumably, we'll |
| 2161 | * fail again for the same reason. |
| 2162 | */ |
| 2163 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); |
| 2164 | goto renew; |
| 2165 | } |
| 2166 | if (open->op_seqid != sop->so_seqid) |
| 2167 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | renew: |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2169 | if (open->op_stateowner == NULL) { |
| 2170 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 2171 | if (sop == NULL) |
| 2172 | return nfserr_resource; |
| 2173 | open->op_stateowner = sop; |
| 2174 | } |
| 2175 | list_del_init(&sop->so_close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | renew_client(sop->so_client); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2177 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | } |
| 2179 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2180 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 2181 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 2182 | { |
| 2183 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 2184 | return nfserr_openmode; |
| 2185 | else |
| 2186 | return nfs_ok; |
| 2187 | } |
| 2188 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 2189 | static struct nfs4_delegation * |
| 2190 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 2191 | { |
| 2192 | struct nfs4_delegation *dp; |
| 2193 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2194 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 2195 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 2196 | return dp; |
| 2197 | } |
| 2198 | return NULL; |
| 2199 | } |
| 2200 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2201 | static __be32 |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2202 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 2203 | struct nfs4_delegation **dp) |
| 2204 | { |
| 2205 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2206 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2207 | |
| 2208 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 2209 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2210 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2211 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 2212 | RD_STATE : WR_STATE; |
| 2213 | status = nfs4_check_delegmode(*dp, flags); |
| 2214 | if (status) |
| 2215 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2216 | out: |
| 2217 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 2218 | return nfs_ok; |
| 2219 | if (status) |
| 2220 | return status; |
| 2221 | open->op_stateowner->so_confirmed = 1; |
| 2222 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2223 | } |
| 2224 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2225 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 2227 | { |
| 2228 | struct nfs4_stateid *local; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2229 | __be32 status = nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 2231 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2232 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | /* ignore lock owners */ |
| 2234 | if (local->st_stateowner->so_is_open_owner == 0) |
| 2235 | continue; |
| 2236 | /* remember if we have seen this open owner */ |
| 2237 | if (local->st_stateowner == sop) |
| 2238 | *stpp = local; |
| 2239 | /* check for conflicting share reservations */ |
| 2240 | if (!test_share(local, open)) |
| 2241 | goto out; |
| 2242 | } |
| 2243 | status = 0; |
| 2244 | out: |
| 2245 | return status; |
| 2246 | } |
| 2247 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2248 | static inline struct nfs4_stateid * |
| 2249 | nfs4_alloc_stateid(void) |
| 2250 | { |
| 2251 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 2252 | } |
| 2253 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2254 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2256 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | struct svc_fh *cur_fh, int flags) |
| 2258 | { |
| 2259 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2261 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | if (stp == NULL) |
| 2263 | return nfserr_resource; |
| 2264 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2265 | if (dp) { |
| 2266 | get_file(dp->dl_vfs_file); |
| 2267 | stp->st_vfs_file = dp->dl_vfs_file; |
| 2268 | } else { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2269 | __be32 status; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2270 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 2271 | &stp->st_vfs_file); |
| 2272 | if (status) { |
| 2273 | if (status == nfserr_dropit) |
| 2274 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2275 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2276 | return status; |
| 2277 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | *stpp = stp; |
| 2280 | return 0; |
| 2281 | } |
| 2282 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2283 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 2285 | struct nfsd4_open *open) |
| 2286 | { |
| 2287 | struct iattr iattr = { |
| 2288 | .ia_valid = ATTR_SIZE, |
| 2289 | .ia_size = 0, |
| 2290 | }; |
| 2291 | if (!open->op_truncate) |
| 2292 | return 0; |
| 2293 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 2294 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 2296 | } |
| 2297 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2298 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 2300 | { |
| 2301 | struct file *filp = stp->st_vfs_file; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 2302 | struct inode *inode = filp->f_path.dentry->d_inode; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2303 | unsigned int share_access, new_writer; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2304 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | |
| 2306 | set_access(&share_access, stp->st_access_bmap); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2307 | new_writer = (~share_access) & open->op_share_access |
| 2308 | & NFS4_SHARE_ACCESS_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2310 | if (new_writer) { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2311 | int err = get_write_access(inode); |
| 2312 | if (err) |
| 2313 | return nfserrno(err); |
Benny Halevy | e518f05 | 2008-07-04 15:38:41 +0300 | [diff] [blame] | 2314 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
| 2315 | if (err) |
| 2316 | return nfserrno(err); |
| 2317 | file_take_write(filp); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 2320 | if (status) { |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2321 | if (new_writer) |
| 2322 | put_write_access(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | return status; |
| 2324 | } |
| 2325 | /* remember the open */ |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2326 | filp->f_mode |= open->op_share_access; |
J. Bruce Fields | b55e0ba | 2008-04-28 18:22:50 -0400 | [diff] [blame] | 2327 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 2328 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | |
| 2330 | return nfs_ok; |
| 2331 | } |
| 2332 | |
| 2333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | static void |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2335 | nfs4_set_claim_prev(struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | { |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2337 | open->op_stateowner->so_confirmed = 1; |
| 2338 | open->op_stateowner->so_client->cl_firststate = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | } |
| 2340 | |
| 2341 | /* |
| 2342 | * Attempt to hand out a delegation. |
| 2343 | */ |
| 2344 | static void |
| 2345 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 2346 | { |
| 2347 | struct nfs4_delegation *dp; |
| 2348 | struct nfs4_stateowner *sop = stp->st_stateowner; |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 2349 | struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | struct file_lock fl, *flp = &fl; |
| 2351 | int status, flag = 0; |
| 2352 | |
| 2353 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2354 | open->op_recall = 0; |
| 2355 | switch (open->op_claim_type) { |
| 2356 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 2357 | if (!atomic_read(&cb->cb_set)) |
| 2358 | open->op_recall = 1; |
| 2359 | flag = open->op_delegate_type; |
| 2360 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 2361 | goto out; |
| 2362 | break; |
| 2363 | case NFS4_OPEN_CLAIM_NULL: |
| 2364 | /* Let's not give out any delegations till everyone's |
| 2365 | * had the chance to reclaim theirs.... */ |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2366 | if (locks_in_grace()) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2367 | goto out; |
| 2368 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) |
| 2369 | goto out; |
| 2370 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 2371 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 2372 | else |
| 2373 | flag = NFS4_OPEN_DELEGATE_READ; |
| 2374 | break; |
| 2375 | default: |
| 2376 | goto out; |
| 2377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | |
| 2379 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 2380 | if (dp == NULL) { |
| 2381 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2382 | goto out; |
| 2383 | } |
| 2384 | locks_init_lock(&fl); |
| 2385 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 2386 | fl.fl_flags = FL_LEASE; |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 2387 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | fl.fl_end = OFFSET_MAX; |
| 2389 | fl.fl_owner = (fl_owner_t)dp; |
| 2390 | fl.fl_file = stp->st_vfs_file; |
| 2391 | fl.fl_pid = current->tgid; |
| 2392 | |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 2393 | /* vfs_setlease checks to see if delegation should be handed out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 2395 | */ |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 2396 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2397 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 2398 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2400 | goto out; |
| 2401 | } |
| 2402 | |
| 2403 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 2404 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2405 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
| 2406 | STATEID_VAL(&dp->dl_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2408 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 2409 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 2410 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2411 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | open->op_delegate_type = flag; |
| 2413 | } |
| 2414 | |
| 2415 | /* |
| 2416 | * called with nfs4_lock_state() held. |
| 2417 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2418 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 2420 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2421 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | struct nfs4_file *fp = NULL; |
| 2423 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2424 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2425 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2426 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | |
| 2428 | status = nfserr_inval; |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 2429 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 2430 | || !deny_valid(open->op_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | goto out; |
| 2432 | /* |
| 2433 | * Lookup file; if found, lookup stateid and check open request, |
| 2434 | * and check for delegations in the process of being recalled. |
| 2435 | * If not found, create the nfs4_file struct |
| 2436 | */ |
| 2437 | fp = find_file(ino); |
| 2438 | if (fp) { |
| 2439 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 2440 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2441 | status = nfs4_check_deleg(fp, open, &dp); |
| 2442 | if (status) |
| 2443 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2445 | status = nfserr_bad_stateid; |
| 2446 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 2447 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | status = nfserr_resource; |
| 2449 | fp = alloc_init_file(ino); |
| 2450 | if (fp == NULL) |
| 2451 | goto out; |
| 2452 | } |
| 2453 | |
| 2454 | /* |
| 2455 | * OPEN the file, or upgrade an existing OPEN. |
| 2456 | * If truncate fails, the OPEN fails. |
| 2457 | */ |
| 2458 | if (stp) { |
| 2459 | /* Stateid was found, this is an OPEN upgrade */ |
| 2460 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 2461 | if (status) |
| 2462 | goto out; |
NeilBrown | 444c2c0 | 2005-07-07 17:59:22 -0700 | [diff] [blame] | 2463 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | } else { |
| 2465 | /* Stateid was not found, this is a new OPEN */ |
| 2466 | int flags = 0; |
J. Bruce Fields | 9ecb6a0 | 2006-06-30 01:56:17 -0700 | [diff] [blame] | 2467 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2468 | flags |= NFSD_MAY_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2470 | flags |= NFSD_MAY_WRITE; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2471 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 2472 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | goto out; |
| 2474 | init_stateid(stp, fp, open); |
| 2475 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 2476 | if (status) { |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 2477 | release_open_stateid(stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | goto out; |
| 2479 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2480 | if (nfsd4_has_session(&resp->cstate)) |
| 2481 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | } |
| 2483 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2484 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2485 | if (nfsd4_has_session(&resp->cstate)) |
| 2486 | open->op_stateowner->so_confirmed = 1; |
| 2487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | /* |
| 2489 | * Attempt to hand out a delegation. No error return, because the |
| 2490 | * OPEN succeeds even if we fail. |
| 2491 | */ |
| 2492 | nfs4_open_delegation(current_fh, open, stp); |
| 2493 | |
| 2494 | status = nfs_ok; |
| 2495 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2496 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
| 2497 | STATEID_VAL(&stp->st_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2499 | if (fp) |
| 2500 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2501 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 2502 | nfs4_set_claim_prev(open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | /* |
| 2504 | * To finish the open response, we just need to set the rflags. |
| 2505 | */ |
| 2506 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2507 | if (!open->op_stateowner->so_confirmed && |
| 2508 | !nfsd4_has_session(&resp->cstate)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 2510 | |
| 2511 | return status; |
| 2512 | } |
| 2513 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2514 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2515 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2516 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | { |
| 2518 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2519 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | |
| 2521 | nfs4_lock_state(); |
| 2522 | dprintk("process_renew(%08x/%08x): starting\n", |
| 2523 | clid->cl_boot, clid->cl_id); |
| 2524 | status = nfserr_stale_clientid; |
| 2525 | if (STALE_CLIENTID(clid)) |
| 2526 | goto out; |
| 2527 | clp = find_confirmed_client(clid); |
| 2528 | status = nfserr_expired; |
| 2529 | if (clp == NULL) { |
| 2530 | /* We assume the client took too long to RENEW. */ |
| 2531 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 2532 | goto out; |
| 2533 | } |
| 2534 | renew_client(clp); |
| 2535 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2536 | if (!list_empty(&clp->cl_delegations) |
J. Bruce Fields | c237dc0 | 2009-04-29 19:09:19 -0400 | [diff] [blame] | 2537 | && !atomic_read(&clp->cl_cb_conn.cb_set)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | goto out; |
| 2539 | status = nfs_ok; |
| 2540 | out: |
| 2541 | nfs4_unlock_state(); |
| 2542 | return status; |
| 2543 | } |
| 2544 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2545 | struct lock_manager nfsd4_manager = { |
| 2546 | }; |
| 2547 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2548 | static void |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2549 | nfsd4_end_grace(void) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2550 | { |
| 2551 | dprintk("NFSD: end of grace period\n"); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2552 | nfsd4_recdir_purge_old(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2553 | locks_end_grace(&nfsd4_manager); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 2554 | } |
| 2555 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2556 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | nfs4_laundromat(void) |
| 2558 | { |
| 2559 | struct nfs4_client *clp; |
| 2560 | struct nfs4_stateowner *sop; |
| 2561 | struct nfs4_delegation *dp; |
| 2562 | struct list_head *pos, *next, reaplist; |
| 2563 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; |
| 2564 | time_t t, clientid_val = NFSD_LEASE_TIME; |
| 2565 | time_t u, test_val = NFSD_LEASE_TIME; |
| 2566 | |
| 2567 | nfs4_lock_state(); |
| 2568 | |
| 2569 | dprintk("NFSD: laundromat service - starting\n"); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2570 | if (locks_in_grace()) |
| 2571 | nfsd4_end_grace(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | list_for_each_safe(pos, next, &client_lru) { |
| 2573 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 2574 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 2575 | t = clp->cl_time - cutoff; |
| 2576 | if (clientid_val > t) |
| 2577 | clientid_val = t; |
| 2578 | break; |
| 2579 | } |
| 2580 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 2581 | clp->cl_clientid.cl_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2582 | nfsd4_remove_clid_dir(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | expire_client(clp); |
| 2584 | } |
| 2585 | INIT_LIST_HEAD(&reaplist); |
| 2586 | spin_lock(&recall_lock); |
| 2587 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 2588 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 2589 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 2590 | u = dp->dl_time - cutoff; |
| 2591 | if (test_val > u) |
| 2592 | test_val = u; |
| 2593 | break; |
| 2594 | } |
| 2595 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 2596 | dp, dp->dl_flock); |
| 2597 | list_move(&dp->dl_recall_lru, &reaplist); |
| 2598 | } |
| 2599 | spin_unlock(&recall_lock); |
| 2600 | list_for_each_safe(pos, next, &reaplist) { |
| 2601 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 2602 | list_del_init(&dp->dl_recall_lru); |
| 2603 | unhash_delegation(dp); |
| 2604 | } |
| 2605 | test_val = NFSD_LEASE_TIME; |
| 2606 | list_for_each_safe(pos, next, &close_lru) { |
| 2607 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 2608 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 2609 | u = sop->so_time - cutoff; |
| 2610 | if (test_val > u) |
| 2611 | test_val = u; |
| 2612 | break; |
| 2613 | } |
| 2614 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 2615 | sop->so_id); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2616 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | } |
| 2618 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 2619 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 2620 | nfs4_unlock_state(); |
| 2621 | return clientid_val; |
| 2622 | } |
| 2623 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 2624 | static struct workqueue_struct *laundry_wq; |
| 2625 | static void laundromat_main(struct work_struct *); |
| 2626 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); |
| 2627 | |
| 2628 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2629 | laundromat_main(struct work_struct *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | { |
| 2631 | time_t t; |
| 2632 | |
| 2633 | t = nfs4_laundromat(); |
| 2634 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 2635 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | } |
| 2637 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2638 | static struct nfs4_stateowner * |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2639 | search_close_lru(u32 st_id, int flags) |
| 2640 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2641 | struct nfs4_stateowner *local = NULL; |
| 2642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2643 | if (flags & CLOSE_STATE) { |
| 2644 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 2645 | if (local->so_id == st_id) |
| 2646 | return local; |
| 2647 | } |
| 2648 | } |
| 2649 | return NULL; |
| 2650 | } |
| 2651 | |
| 2652 | static inline int |
| 2653 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 2654 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 2655 | 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] | 2656 | } |
| 2657 | |
| 2658 | static int |
| 2659 | STALE_STATEID(stateid_t *stateid) |
| 2660 | { |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2661 | if (time_after((unsigned long)boot_time, |
| 2662 | (unsigned long)stateid->si_boot)) { |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2663 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
| 2664 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2665 | return 1; |
| 2666 | } |
| 2667 | return 0; |
| 2668 | } |
| 2669 | |
| 2670 | static int |
| 2671 | EXPIRED_STATEID(stateid_t *stateid) |
| 2672 | { |
| 2673 | if (time_before((unsigned long)boot_time, |
| 2674 | ((unsigned long)stateid->si_boot)) && |
J. Bruce Fields | b8fd47a | 2009-04-29 11:36:17 -0400 | [diff] [blame] | 2675 | time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2676 | dprintk("NFSD: expired stateid " STATEID_FMT "!\n", |
| 2677 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2678 | return 1; |
| 2679 | } |
| 2680 | return 0; |
| 2681 | } |
| 2682 | |
| 2683 | static __be32 |
| 2684 | stateid_error_map(stateid_t *stateid) |
| 2685 | { |
| 2686 | if (STALE_STATEID(stateid)) |
| 2687 | return nfserr_stale_stateid; |
| 2688 | if (EXPIRED_STATEID(stateid)) |
| 2689 | return nfserr_expired; |
| 2690 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2691 | dprintk("NFSD: bad stateid " STATEID_FMT "!\n", |
| 2692 | STATEID_VAL(stateid)); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2693 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | } |
| 2695 | |
| 2696 | static inline int |
| 2697 | access_permit_read(unsigned long access_bmap) |
| 2698 | { |
| 2699 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 2700 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 2701 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 2702 | } |
| 2703 | |
| 2704 | static inline int |
| 2705 | access_permit_write(unsigned long access_bmap) |
| 2706 | { |
| 2707 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 2708 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 2709 | } |
| 2710 | |
| 2711 | static |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2712 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2713 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2714 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | |
| 2716 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 2717 | goto out; |
| 2718 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 2719 | goto out; |
| 2720 | status = nfs_ok; |
| 2721 | out: |
| 2722 | return status; |
| 2723 | } |
| 2724 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2725 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2727 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2728 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2729 | return nfs_ok; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2730 | else if (locks_in_grace()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | /* Answer in remaining cases depends on existance of |
| 2732 | * conflicting state; so we must wait out the grace period. */ |
| 2733 | return nfserr_grace; |
| 2734 | } else if (flags & WR_STATE) |
| 2735 | return nfs4_share_conflict(current_fh, |
| 2736 | NFS4_SHARE_DENY_WRITE); |
| 2737 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2738 | return nfs4_share_conflict(current_fh, |
| 2739 | NFS4_SHARE_DENY_READ); |
| 2740 | } |
| 2741 | |
| 2742 | /* |
| 2743 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2744 | * that are not able to provide mandatory locking. |
| 2745 | */ |
| 2746 | static inline int |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2747 | grace_disallows_io(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2748 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2749 | return locks_in_grace() && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2750 | } |
| 2751 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2752 | 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] | 2753 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2754 | /* |
| 2755 | * When sessions are used the stateid generation number is ignored |
| 2756 | * when it is zero. |
| 2757 | */ |
| 2758 | if ((flags & HAS_SESSION) && in->si_generation == 0) |
| 2759 | goto out; |
| 2760 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2761 | /* If the client sends us a stateid from the future, it's buggy: */ |
| 2762 | if (in->si_generation > ref->si_generation) |
| 2763 | return nfserr_bad_stateid; |
| 2764 | /* |
| 2765 | * The following, however, can happen. For example, if the |
| 2766 | * client sends an open and some IO at the same time, the open |
| 2767 | * may bump si_generation while the IO is still in flight. |
| 2768 | * Thanks to hard links and renames, the client never knows what |
| 2769 | * file an open will affect. So it could avoid that situation |
| 2770 | * only by serializing all opens and IO from the same open |
| 2771 | * owner. To recover from the old_stateid error, the client |
| 2772 | * will just have to retry the IO: |
| 2773 | */ |
| 2774 | if (in->si_generation < ref->si_generation) |
| 2775 | return nfserr_old_stateid; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2776 | out: |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2777 | return nfs_ok; |
| 2778 | } |
| 2779 | |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2780 | static int is_delegation_stateid(stateid_t *stateid) |
| 2781 | { |
| 2782 | return stateid->si_fileid == 0; |
| 2783 | } |
| 2784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | /* |
| 2786 | * Checks for stateid operations |
| 2787 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2788 | __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2789 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
| 2790 | stateid_t *stateid, int flags, struct file **filpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | { |
| 2792 | struct nfs4_stateid *stp = NULL; |
| 2793 | struct nfs4_delegation *dp = NULL; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2794 | struct svc_fh *current_fh = &cstate->current_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2796 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | if (filpp) |
| 2799 | *filpp = NULL; |
| 2800 | |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2801 | if (grace_disallows_io(ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | return nfserr_grace; |
| 2803 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2804 | if (nfsd4_has_session(cstate)) |
| 2805 | flags |= HAS_SESSION; |
| 2806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2808 | return check_special_stateids(current_fh, stateid, flags); |
| 2809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | status = nfserr_stale_stateid; |
| 2811 | if (STALE_STATEID(stateid)) |
| 2812 | goto out; |
| 2813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | status = nfserr_bad_stateid; |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2815 | if (is_delegation_stateid(stateid)) { |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2816 | dp = find_delegation_stateid(ino, stateid); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2817 | if (!dp) { |
| 2818 | status = stateid_error_map(stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2820 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2821 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
| 2822 | flags); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2823 | if (status) |
| 2824 | goto out; |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2825 | status = nfs4_check_delegmode(dp, flags); |
| 2826 | if (status) |
| 2827 | goto out; |
| 2828 | renew_client(dp->dl_client); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2829 | if (filpp) |
| 2830 | *filpp = dp->dl_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | } else { /* open or lock stateid */ |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2832 | stp = find_stateid(stateid, flags); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2833 | if (!stp) { |
| 2834 | status = stateid_error_map(stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2836 | } |
J. Bruce Fields | 6150ef0 | 2009-02-21 13:36:16 -0800 | [diff] [blame] | 2837 | if (nfs4_check_fh(current_fh, stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | goto out; |
| 2839 | if (!stp->st_stateowner->so_confirmed) |
| 2840 | goto out; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2841 | status = check_stateid_generation(stateid, &stp->st_stateid, |
| 2842 | flags); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2843 | if (status) |
| 2844 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2845 | status = nfs4_check_openmode(stp, flags); |
| 2846 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2847 | goto out; |
| 2848 | renew_client(stp->st_stateowner->so_client); |
| 2849 | if (filpp) |
| 2850 | *filpp = stp->st_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2851 | } |
| 2852 | status = nfs_ok; |
| 2853 | out: |
| 2854 | return status; |
| 2855 | } |
| 2856 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2857 | static inline int |
| 2858 | setlkflg (int type) |
| 2859 | { |
| 2860 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 2861 | RD_STATE : WR_STATE; |
| 2862 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | |
| 2864 | /* |
| 2865 | * Checks for sequence id mutating operations. |
| 2866 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2867 | static __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2868 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
| 2869 | stateid_t *stateid, int flags, |
| 2870 | struct nfs4_stateowner **sopp, |
| 2871 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2872 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | struct nfs4_stateid *stp; |
| 2874 | struct nfs4_stateowner *sop; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 2875 | struct svc_fh *current_fh = &cstate->current_fh; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2876 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2878 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
| 2879 | seqid, STATEID_VAL(stateid)); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | *stpp = NULL; |
| 2882 | *sopp = NULL; |
| 2883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2885 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2886 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | } |
| 2888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | if (STALE_STATEID(stateid)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2890 | return nfserr_stale_stateid; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2891 | |
| 2892 | if (nfsd4_has_session(cstate)) |
| 2893 | flags |= HAS_SESSION; |
| 2894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | /* |
| 2896 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2897 | * the confirmed flag is incorrecly set, or the generation |
| 2898 | * number is incorrect. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2899 | */ |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2900 | stp = find_stateid(stateid, flags); |
| 2901 | if (stp == NULL) { |
| 2902 | /* |
| 2903 | * Also, we should make sure this isn't just the result of |
| 2904 | * a replayed close: |
| 2905 | */ |
| 2906 | sop = search_close_lru(stateid->si_stateownerid, flags); |
| 2907 | if (sop == NULL) |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 2908 | return stateid_error_map(stateid); |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2909 | *sopp = sop; |
| 2910 | goto check_replay; |
| 2911 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 2913 | *stpp = stp; |
| 2914 | *sopp = sop = stp->st_stateowner; |
| 2915 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2916 | if (lock) { |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2917 | clientid_t *lockclid = &lock->v.new.clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2918 | struct nfs4_client *clp = sop->so_client; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2919 | int lkflg = 0; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2920 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2921 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2922 | lkflg = setlkflg(lock->lk_type); |
| 2923 | |
| 2924 | if (lock->lk_is_new) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2925 | if (!sop->so_is_open_owner) |
| 2926 | return nfserr_bad_stateid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 2927 | if (!(flags & HAS_SESSION) && |
| 2928 | !same_clid(&clp->cl_clientid, lockclid)) |
| 2929 | return nfserr_bad_stateid; |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2930 | /* stp is the open stateid */ |
| 2931 | status = nfs4_check_openmode(stp, lkflg); |
| 2932 | if (status) |
| 2933 | return status; |
| 2934 | } else { |
| 2935 | /* stp is the lock stateid */ |
| 2936 | status = nfs4_check_openmode(stp->st_openstp, lkflg); |
| 2937 | if (status) |
| 2938 | return status; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2939 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | } |
| 2941 | |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2942 | if (nfs4_check_fh(current_fh, stp)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2943 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2944 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | } |
| 2946 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2947 | /* |
| 2948 | * We now validate the seqid and stateid generation numbers. |
| 2949 | * For the moment, we ignore the possibility of |
| 2950 | * generation number wraparound. |
| 2951 | */ |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2952 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | goto check_replay; |
| 2954 | |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2955 | if (sop->so_confirmed && flags & CONFIRM) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2956 | dprintk("NFSD: preprocess_seqid_op: expected" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2957 | " unconfirmed stateowner!\n"); |
| 2958 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2960 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2961 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2962 | " confirmed yet!\n"); |
| 2963 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2965 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2966 | if (status) |
| 2967 | return status; |
NeilBrown | 52fd004 | 2005-07-07 17:59:24 -0700 | [diff] [blame] | 2968 | renew_client(sop->so_client); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2969 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | check_replay: |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2972 | if (seqid == sop->so_seqid - 1) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2973 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | /* indicate replay to calling function */ |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 2975 | return nfserr_replay_me; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | } |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2977 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2978 | sop->so_seqid, seqid); |
| 2979 | *sopp = NULL; |
| 2980 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | } |
| 2982 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2983 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2984 | 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] | 2985 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2987 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | struct nfs4_stateowner *sop; |
| 2989 | struct nfs4_stateid *stp; |
| 2990 | |
| 2991 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2992 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2993 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2995 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 2996 | if (status) |
| 2997 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | |
| 2999 | nfs4_lock_state(); |
| 3000 | |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3001 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3002 | oc->oc_seqid, &oc->oc_req_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3003 | CONFIRM | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3004 | &oc->oc_stateowner, &stp, NULL))) |
| 3005 | goto out; |
| 3006 | |
| 3007 | sop = oc->oc_stateowner; |
| 3008 | sop->so_confirmed = 1; |
| 3009 | update_stateid(&stp->st_stateid); |
| 3010 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3011 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
| 3012 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3013 | |
| 3014 | nfsd4_create_clid_dir(sop->so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3015 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3016 | if (oc->oc_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | nfs4_get_stateowner(oc->oc_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3018 | cstate->replay_owner = oc->oc_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3019 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3020 | nfs4_unlock_state(); |
| 3021 | return status; |
| 3022 | } |
| 3023 | |
| 3024 | |
| 3025 | /* |
| 3026 | * unset all bits in union bitmap (bmap) that |
| 3027 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 3028 | */ |
| 3029 | static void |
| 3030 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 3031 | { |
| 3032 | int i; |
| 3033 | for (i = 1; i < 4; i++) { |
| 3034 | if ((i & access) != i) |
| 3035 | __clear_bit(i, bmap); |
| 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | static void |
| 3040 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 3041 | { |
| 3042 | int i; |
| 3043 | for (i = 0; i < 4; i++) { |
| 3044 | if ((i & deny) != i) |
| 3045 | __clear_bit(i, bmap); |
| 3046 | } |
| 3047 | } |
| 3048 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3049 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3050 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 3051 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3052 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3053 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3054 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3055 | struct nfs4_stateid *stp; |
| 3056 | unsigned int share_access; |
| 3057 | |
| 3058 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3059 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3060 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | |
Andy Adamson | d87a8ad | 2009-04-03 08:28:53 +0300 | [diff] [blame] | 3062 | if (!access_valid(od->od_share_access, cstate->minorversion) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 3063 | || !deny_valid(od->od_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | return nfserr_inval; |
| 3065 | |
| 3066 | nfs4_lock_state(); |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3067 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3068 | od->od_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | &od->od_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3070 | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3071 | &od->od_stateowner, &stp, NULL))) |
| 3072 | goto out; |
| 3073 | |
| 3074 | status = nfserr_inval; |
| 3075 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 3076 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 3077 | stp->st_access_bmap, od->od_share_access); |
| 3078 | goto out; |
| 3079 | } |
| 3080 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 3081 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 3082 | stp->st_deny_bmap, od->od_share_deny); |
| 3083 | goto out; |
| 3084 | } |
| 3085 | set_access(&share_access, stp->st_access_bmap); |
| 3086 | nfs4_file_downgrade(stp->st_vfs_file, |
| 3087 | share_access & ~od->od_share_access); |
| 3088 | |
| 3089 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 3090 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 3091 | |
| 3092 | update_stateid(&stp->st_stateid); |
| 3093 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3094 | status = nfs_ok; |
| 3095 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3096 | if (od->od_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | nfs4_get_stateowner(od->od_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3098 | cstate->replay_owner = od->od_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3099 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | nfs4_unlock_state(); |
| 3101 | return status; |
| 3102 | } |
| 3103 | |
| 3104 | /* |
| 3105 | * nfs4_unlock_state() called after encode |
| 3106 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3107 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3108 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3109 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3111 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3112 | struct nfs4_stateid *stp; |
| 3113 | |
| 3114 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3115 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3116 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3117 | |
| 3118 | nfs4_lock_state(); |
| 3119 | /* check close_lru for replay */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3120 | if ((status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3121 | close->cl_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3122 | &close->cl_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3123 | OPEN_STATE | CLOSE_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3124 | &close->cl_stateowner, &stp, NULL))) |
| 3125 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3126 | status = nfs_ok; |
| 3127 | update_stateid(&stp->st_stateid); |
| 3128 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3129 | |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3130 | /* release_stateid() calls nfsd_close() if needed */ |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 3131 | release_open_stateid(stp); |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3132 | |
| 3133 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 3134 | * released by the laundromat service after the lease period |
| 3135 | * to enable us to handle CLOSE replay |
| 3136 | */ |
| 3137 | if (list_empty(&close->cl_stateowner->so_stateids)) |
| 3138 | move_to_close_lru(close->cl_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3140 | if (close->cl_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | nfs4_get_stateowner(close->cl_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3142 | cstate->replay_owner = close->cl_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3143 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3144 | nfs4_unlock_state(); |
| 3145 | return status; |
| 3146 | } |
| 3147 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3148 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3149 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3150 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3152 | struct nfs4_delegation *dp; |
| 3153 | stateid_t *stateid = &dr->dr_stateid; |
| 3154 | struct inode *inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3155 | __be32 status; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3156 | int flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3157 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3158 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3159 | return status; |
| 3160 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3161 | |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3162 | if (nfsd4_has_session(cstate)) |
| 3163 | flags |= HAS_SESSION; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3164 | nfs4_lock_state(); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3165 | status = nfserr_bad_stateid; |
| 3166 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3167 | goto out; |
| 3168 | status = nfserr_stale_stateid; |
| 3169 | if (STALE_STATEID(stateid)) |
| 3170 | goto out; |
J. Bruce Fields | 7e0f7cf | 2009-02-21 13:32:28 -0800 | [diff] [blame] | 3171 | status = nfserr_bad_stateid; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3172 | if (!is_delegation_stateid(stateid)) |
| 3173 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3174 | dp = find_delegation_stateid(inode, stateid); |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3175 | if (!dp) { |
| 3176 | status = stateid_error_map(stateid); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3177 | goto out; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3178 | } |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3179 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3180 | if (status) |
| 3181 | goto out; |
| 3182 | renew_client(dp->dl_client); |
| 3183 | |
| 3184 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3186 | nfs4_unlock_state(); |
| 3187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3188 | return status; |
| 3189 | } |
| 3190 | |
| 3191 | |
| 3192 | /* |
| 3193 | * Lock owner state (byte-range locks) |
| 3194 | */ |
| 3195 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 3196 | #define LOCK_HASH_BITS 8 |
| 3197 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 3198 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 3199 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3200 | static inline u64 |
| 3201 | end_offset(u64 start, u64 len) |
| 3202 | { |
| 3203 | u64 end; |
| 3204 | |
| 3205 | end = start + len; |
| 3206 | return end >= start ? end: NFS4_MAX_UINT64; |
| 3207 | } |
| 3208 | |
| 3209 | /* last octet in a range */ |
| 3210 | static inline u64 |
| 3211 | last_byte_offset(u64 start, u64 len) |
| 3212 | { |
| 3213 | u64 end; |
| 3214 | |
| 3215 | BUG_ON(!len); |
| 3216 | end = start + len; |
| 3217 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 3218 | } |
| 3219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3220 | #define lockownerid_hashval(id) \ |
| 3221 | ((id) & LOCK_HASH_MASK) |
| 3222 | |
| 3223 | static inline unsigned int |
| 3224 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 3225 | struct xdr_netobj *ownername) |
| 3226 | { |
| 3227 | return (file_hashval(inode) + cl_id |
| 3228 | + opaque_hashval(ownername->data, ownername->len)) |
| 3229 | & LOCK_HASH_MASK; |
| 3230 | } |
| 3231 | |
| 3232 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 3233 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 3234 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 3235 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3236 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | find_stateid(stateid_t *stid, int flags) |
| 3238 | { |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3239 | struct nfs4_stateid *local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3240 | u32 st_id = stid->si_stateownerid; |
| 3241 | u32 f_id = stid->si_fileid; |
| 3242 | unsigned int hashval; |
| 3243 | |
| 3244 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3245 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | hashval = stateid_hashval(st_id, f_id); |
| 3247 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 3248 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 3249 | (local->st_stateid.si_fileid == f_id)) |
| 3250 | return local; |
| 3251 | } |
| 3252 | } |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 3253 | |
| 3254 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3255 | hashval = stateid_hashval(st_id, f_id); |
| 3256 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 3257 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 3258 | (local->st_stateid.si_fileid == f_id)) |
| 3259 | return local; |
| 3260 | } |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3261 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | return NULL; |
| 3263 | } |
| 3264 | |
| 3265 | static struct nfs4_delegation * |
| 3266 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 3267 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3268 | struct nfs4_file *fp; |
| 3269 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3271 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
| 3272 | STATEID_VAL(stid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3275 | if (!fp) |
| 3276 | return NULL; |
| 3277 | dl = find_delegation_file(fp, stid); |
| 3278 | put_nfs4_file(fp); |
| 3279 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3280 | } |
| 3281 | |
| 3282 | /* |
| 3283 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 3284 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 3285 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 3286 | * locking, this prevents us from being completely protocol-compliant. The |
| 3287 | * real solution to this problem is to start using unsigned file offsets in |
| 3288 | * the VFS, but this is a very deep change! |
| 3289 | */ |
| 3290 | static inline void |
| 3291 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 3292 | { |
| 3293 | if (lock->fl_start < 0) |
| 3294 | lock->fl_start = OFFSET_MAX; |
| 3295 | if (lock->fl_end < 0) |
| 3296 | lock->fl_end = OFFSET_MAX; |
| 3297 | } |
| 3298 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3299 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 3300 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 3301 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3302 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3303 | |
| 3304 | static inline void |
| 3305 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 3306 | { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3307 | struct nfs4_stateowner *sop; |
| 3308 | unsigned int hval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3309 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3310 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
| 3311 | sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 3312 | hval = lockownerid_hashval(sop->so_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3313 | kref_get(&sop->so_ref); |
| 3314 | deny->ld_sop = sop; |
| 3315 | deny->ld_clientid = sop->so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3316 | } else { |
| 3317 | deny->ld_sop = NULL; |
| 3318 | deny->ld_clientid.cl_boot = 0; |
| 3319 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3320 | } |
| 3321 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3322 | deny->ld_length = NFS4_MAX_UINT64; |
| 3323 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 3325 | deny->ld_type = NFS4_READ_LT; |
| 3326 | if (fl->fl_type != F_RDLCK) |
| 3327 | deny->ld_type = NFS4_WRITE_LT; |
| 3328 | } |
| 3329 | |
| 3330 | static struct nfs4_stateowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 3332 | struct xdr_netobj *owner) |
| 3333 | { |
| 3334 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 3335 | struct nfs4_stateowner *op; |
| 3336 | |
| 3337 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3338 | if (same_owner_str(op, owner, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3339 | return op; |
| 3340 | } |
| 3341 | return NULL; |
| 3342 | } |
| 3343 | |
| 3344 | /* |
| 3345 | * Alloc a lock owner structure. |
| 3346 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 3347 | * occured. |
| 3348 | * |
| 3349 | * strhashval = lock_ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3350 | */ |
| 3351 | |
| 3352 | static struct nfs4_stateowner * |
| 3353 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 3354 | struct nfs4_stateowner *sop; |
| 3355 | struct nfs4_replay *rp; |
| 3356 | unsigned int idhashval; |
| 3357 | |
| 3358 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 3359 | return NULL; |
| 3360 | idhashval = lockownerid_hashval(current_ownerid); |
| 3361 | INIT_LIST_HEAD(&sop->so_idhash); |
| 3362 | INIT_LIST_HEAD(&sop->so_strhash); |
| 3363 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3364 | INIT_LIST_HEAD(&sop->so_stateids); |
| 3365 | INIT_LIST_HEAD(&sop->so_perstateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 3367 | sop->so_time = 0; |
| 3368 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 3369 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3370 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3371 | sop->so_is_open_owner = 0; |
| 3372 | sop->so_id = current_ownerid++; |
| 3373 | sop->so_client = clp; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3374 | /* It is the openowner seqid that will be incremented in encode in the |
| 3375 | * case of new lockowners; so increment the lock seqid manually: */ |
| 3376 | sop->so_seqid = lock->lk_new_lock_seqid + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3377 | sop->so_confirmed = 1; |
| 3378 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 3379 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3380 | rp->rp_buflen = 0; |
| 3381 | rp->rp_buf = rp->rp_ibuf; |
| 3382 | return sop; |
| 3383 | } |
| 3384 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3385 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 3387 | { |
| 3388 | struct nfs4_stateid *stp; |
| 3389 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 3390 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 3391 | stp = nfs4_alloc_stateid(); |
| 3392 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3393 | goto out; |
| 3394 | INIT_LIST_HEAD(&stp->st_hash); |
| 3395 | INIT_LIST_HEAD(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3396 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 3397 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3398 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 3399 | list_add(&stp->st_perfile, &fp->fi_stateids); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3400 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3401 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3402 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3403 | stp->st_file = fp; |
Bian Naimeng | 78155ed | 2009-04-22 18:25:37 +0800 | [diff] [blame] | 3404 | stp->st_stateid.si_boot = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 3406 | stp->st_stateid.si_fileid = fp->fi_id; |
| 3407 | stp->st_stateid.si_generation = 0; |
| 3408 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 3409 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 3410 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 3411 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | |
| 3413 | out: |
| 3414 | return stp; |
| 3415 | } |
| 3416 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3417 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | check_lock_length(u64 offset, u64 length) |
| 3419 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3420 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3421 | LOFF_OVERFLOW(offset, length))); |
| 3422 | } |
| 3423 | |
| 3424 | /* |
| 3425 | * LOCK operation |
| 3426 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3427 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3428 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3429 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3430 | { |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3431 | struct nfs4_stateowner *open_sop = NULL; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3432 | struct nfs4_stateowner *lock_sop = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3433 | struct nfs4_stateid *lock_stp; |
| 3434 | struct file *filp; |
| 3435 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 3436 | struct file_lock conflock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3437 | __be32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3438 | unsigned int strhashval; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3439 | unsigned int cmd; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3440 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3441 | |
| 3442 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 3443 | (long long) lock->lk_offset, |
| 3444 | (long long) lock->lk_length); |
| 3445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 3447 | return nfserr_inval; |
| 3448 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3449 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 3450 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 3451 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 3452 | return status; |
| 3453 | } |
| 3454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3455 | nfs4_lock_state(); |
| 3456 | |
| 3457 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 3458 | /* |
| 3459 | * Client indicates that this is a new lockowner. |
| 3460 | * Use open owner and open stateid to create lock owner and |
| 3461 | * lock stateid. |
| 3462 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | struct nfs4_stateid *open_stp = NULL; |
| 3464 | struct nfs4_file *fp; |
| 3465 | |
| 3466 | status = nfserr_stale_clientid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 3467 | if (!nfsd4_has_session(cstate) && |
| 3468 | STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | /* validate and update open stateid and open seqid */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3472 | status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3473 | lock->lk_new_open_seqid, |
| 3474 | &lock->lk_new_open_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3475 | OPEN_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3476 | &lock->lk_replay_owner, &open_stp, |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3477 | lock); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 3478 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3479 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3480 | open_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3481 | /* create lockowner and lock stateid */ |
| 3482 | fp = open_stp->st_file; |
| 3483 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 3484 | open_sop->so_client->cl_clientid.cl_id, |
| 3485 | &lock->v.new.owner); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3486 | /* XXX: Do we need to check for duplicate stateowners on |
| 3487 | * the same file, or should they just be allowed (and |
| 3488 | * create new stateids)? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | status = nfserr_resource; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3490 | lock_sop = alloc_init_lock_stateowner(strhashval, |
| 3491 | open_sop->so_client, open_stp, lock); |
| 3492 | if (lock_sop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3493 | goto out; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3494 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 3495 | if (lock_stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3497 | } else { |
| 3498 | /* lock (lock owner + lock stateid) already exists */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3499 | status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | lock->lk_old_lock_seqid, |
| 3501 | &lock->lk_old_lock_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3502 | LOCK_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3503 | &lock->lk_replay_owner, &lock_stp, lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3504 | if (status) |
| 3505 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3506 | lock_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | } |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3508 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | filp = lock_stp->st_vfs_file; |
| 3510 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3511 | status = nfserr_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3512 | if (locks_in_grace() && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3513 | goto out; |
| 3514 | status = nfserr_no_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3515 | if (!locks_in_grace() && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 3516 | goto out; |
| 3517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3518 | locks_init_lock(&file_lock); |
| 3519 | switch (lock->lk_type) { |
| 3520 | case NFS4_READ_LT: |
| 3521 | case NFS4_READW_LT: |
| 3522 | file_lock.fl_type = F_RDLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3523 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3524 | break; |
| 3525 | case NFS4_WRITE_LT: |
| 3526 | case NFS4_WRITEW_LT: |
| 3527 | file_lock.fl_type = F_WRLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 3528 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3529 | break; |
| 3530 | default: |
| 3531 | status = nfserr_inval; |
| 3532 | goto out; |
| 3533 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3534 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | file_lock.fl_pid = current->tgid; |
| 3536 | file_lock.fl_file = filp; |
| 3537 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3538 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3539 | |
| 3540 | file_lock.fl_start = lock->lk_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3541 | 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] | 3542 | nfs4_transform_lock_offset(&file_lock); |
| 3543 | |
| 3544 | /* |
| 3545 | * Try to lock the file in the VFS. |
| 3546 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 3547 | */ |
| 3548 | |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3549 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3550 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3551 | case 0: /* success! */ |
| 3552 | update_stateid(&lock_stp->st_stateid); |
| 3553 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 3554 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3555 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3556 | break; |
| 3557 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 3558 | status = nfserr_denied; |
| 3559 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 3560 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 3561 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3562 | case (EDEADLK): |
| 3563 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3564 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3565 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3566 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 3567 | status = nfserr_resource; |
| 3568 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3569 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3570 | out: |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 3571 | if (status && lock->lk_is_new && lock_sop) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3572 | release_lockowner(lock_sop); |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 3573 | if (lock->lk_replay_owner) { |
| 3574 | nfs4_get_stateowner(lock->lk_replay_owner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3575 | cstate->replay_owner = lock->lk_replay_owner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3576 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3577 | nfs4_unlock_state(); |
| 3578 | return status; |
| 3579 | } |
| 3580 | |
| 3581 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 3582 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 3583 | * so we do a temporary open here just to get an open file to pass to |
| 3584 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 3585 | * inode operation.) |
| 3586 | */ |
| 3587 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
| 3588 | { |
| 3589 | struct file *file; |
| 3590 | int err; |
| 3591 | |
| 3592 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 3593 | if (err) |
| 3594 | return err; |
| 3595 | err = vfs_test_lock(file, lock); |
| 3596 | nfsd_close(file); |
| 3597 | return err; |
| 3598 | } |
| 3599 | |
| 3600 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3601 | * LOCKT operation |
| 3602 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3603 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3604 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3605 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3606 | { |
| 3607 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | struct file_lock file_lock; |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3609 | int error; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3610 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3611 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3612 | if (locks_in_grace()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3613 | return nfserr_grace; |
| 3614 | |
| 3615 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 3616 | return nfserr_inval; |
| 3617 | |
| 3618 | lockt->lt_stateowner = NULL; |
| 3619 | nfs4_lock_state(); |
| 3620 | |
| 3621 | status = nfserr_stale_clientid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 3622 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3624 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3625 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3626 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3627 | if (status == nfserr_symlink) |
| 3628 | status = nfserr_inval; |
| 3629 | goto out; |
| 3630 | } |
| 3631 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3632 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3633 | locks_init_lock(&file_lock); |
| 3634 | switch (lockt->lt_type) { |
| 3635 | case NFS4_READ_LT: |
| 3636 | case NFS4_READW_LT: |
| 3637 | file_lock.fl_type = F_RDLCK; |
| 3638 | break; |
| 3639 | case NFS4_WRITE_LT: |
| 3640 | case NFS4_WRITEW_LT: |
| 3641 | file_lock.fl_type = F_WRLCK; |
| 3642 | break; |
| 3643 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 3644 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3645 | status = nfserr_inval; |
| 3646 | goto out; |
| 3647 | } |
| 3648 | |
| 3649 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 3650 | &lockt->lt_clientid, &lockt->lt_owner); |
| 3651 | if (lockt->lt_stateowner) |
| 3652 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 3653 | file_lock.fl_pid = current->tgid; |
| 3654 | file_lock.fl_flags = FL_POSIX; |
| 3655 | |
| 3656 | file_lock.fl_start = lockt->lt_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3657 | 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] | 3658 | |
| 3659 | nfs4_transform_lock_offset(&file_lock); |
| 3660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3661 | status = nfs_ok; |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 3662 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3663 | if (error) { |
| 3664 | status = nfserrno(error); |
| 3665 | goto out; |
| 3666 | } |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 3667 | if (file_lock.fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3668 | status = nfserr_denied; |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 3669 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3670 | } |
| 3671 | out: |
| 3672 | nfs4_unlock_state(); |
| 3673 | return status; |
| 3674 | } |
| 3675 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3676 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3677 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3678 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | { |
| 3680 | struct nfs4_stateid *stp; |
| 3681 | struct file *filp = NULL; |
| 3682 | struct file_lock file_lock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3683 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3684 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3685 | |
| 3686 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 3687 | (long long) locku->lu_offset, |
| 3688 | (long long) locku->lu_length); |
| 3689 | |
| 3690 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 3691 | return nfserr_inval; |
| 3692 | |
| 3693 | nfs4_lock_state(); |
| 3694 | |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3695 | if ((status = nfs4_preprocess_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3696 | locku->lu_seqid, |
| 3697 | &locku->lu_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 3698 | LOCK_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3699 | &locku->lu_stateowner, &stp, NULL))) |
| 3700 | goto out; |
| 3701 | |
| 3702 | filp = stp->st_vfs_file; |
| 3703 | BUG_ON(!filp); |
| 3704 | locks_init_lock(&file_lock); |
| 3705 | file_lock.fl_type = F_UNLCK; |
| 3706 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 3707 | file_lock.fl_pid = current->tgid; |
| 3708 | file_lock.fl_file = filp; |
| 3709 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3710 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3711 | file_lock.fl_start = locku->lu_offset; |
| 3712 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3713 | 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] | 3714 | nfs4_transform_lock_offset(&file_lock); |
| 3715 | |
| 3716 | /* |
| 3717 | * Try to unlock the file in the VFS. |
| 3718 | */ |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3719 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3720 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 3721 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3722 | goto out_nfserr; |
| 3723 | } |
| 3724 | /* |
| 3725 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 3726 | */ |
| 3727 | update_stateid(&stp->st_stateid); |
| 3728 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3729 | |
| 3730 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3731 | if (locku->lu_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | nfs4_get_stateowner(locku->lu_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3733 | cstate->replay_owner = locku->lu_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 3734 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | nfs4_unlock_state(); |
| 3736 | return status; |
| 3737 | |
| 3738 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3739 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3740 | goto out; |
| 3741 | } |
| 3742 | |
| 3743 | /* |
| 3744 | * returns |
| 3745 | * 1: locks held by lockowner |
| 3746 | * 0: no locks held by lockowner |
| 3747 | */ |
| 3748 | static int |
| 3749 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 3750 | { |
| 3751 | struct file_lock **flpp; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 3752 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3753 | int status = 0; |
| 3754 | |
| 3755 | lock_kernel(); |
| 3756 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3757 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | status = 1; |
| 3759 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | } |
| 3762 | out: |
| 3763 | unlock_kernel(); |
| 3764 | return status; |
| 3765 | } |
| 3766 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3767 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3768 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 3769 | struct nfsd4_compound_state *cstate, |
| 3770 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3771 | { |
| 3772 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3773 | struct nfs4_stateowner *sop; |
| 3774 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3775 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3776 | struct list_head matches; |
| 3777 | int i; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3778 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3779 | |
| 3780 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 3781 | clid->cl_boot, clid->cl_id); |
| 3782 | |
| 3783 | /* XXX check for lease expiration */ |
| 3784 | |
| 3785 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3786 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3787 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3788 | |
| 3789 | nfs4_lock_state(); |
| 3790 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3791 | status = nfserr_locks_held; |
| 3792 | /* XXX: we're doing a linear search through all the lockowners. |
| 3793 | * Yipes! For now we'll just hope clients aren't really using |
| 3794 | * release_lockowner much, but eventually we have to fix these |
| 3795 | * data structures. */ |
| 3796 | INIT_LIST_HEAD(&matches); |
| 3797 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3798 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3799 | if (!same_owner_str(sop, owner, clid)) |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3800 | continue; |
| 3801 | list_for_each_entry(stp, &sop->so_stateids, |
| 3802 | st_perstateowner) { |
| 3803 | if (check_for_locks(stp->st_vfs_file, sop)) |
| 3804 | goto out; |
| 3805 | /* Note: so_perclient unused for lockowners, |
| 3806 | * so it's OK to fool with here. */ |
| 3807 | list_add(&sop->so_perclient, &matches); |
| 3808 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3809 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3810 | } |
| 3811 | /* Clients probably won't expect us to return with some (but not all) |
| 3812 | * of the lockowner state released; so don't release any until all |
| 3813 | * have been checked. */ |
| 3814 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 3815 | while (!list_empty(&matches)) { |
| 3816 | sop = list_entry(matches.next, struct nfs4_stateowner, |
| 3817 | so_perclient); |
| 3818 | /* unhash_stateowner deletes so_perclient only |
| 3819 | * for openowners. */ |
| 3820 | list_del(&sop->so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3821 | release_lockowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3822 | } |
| 3823 | out: |
| 3824 | nfs4_unlock_state(); |
| 3825 | return status; |
| 3826 | } |
| 3827 | |
| 3828 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3829 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3831 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3832 | } |
| 3833 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3834 | int |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 3835 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3836 | { |
| 3837 | unsigned int strhashval = clientstr_hashval(name); |
| 3838 | struct nfs4_client *clp; |
| 3839 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 3840 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3841 | return clp ? 1 : 0; |
| 3842 | } |
| 3843 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | /* |
| 3845 | * failure => all reset bets are off, nfserr_no_grace... |
| 3846 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3847 | int |
| 3848 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3849 | { |
| 3850 | unsigned int strhashval; |
| 3851 | struct nfs4_client_reclaim *crp = NULL; |
| 3852 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3853 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3854 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3855 | if (!crp) |
| 3856 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3857 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3858 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3859 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3860 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3861 | reclaim_str_hashtbl_size++; |
| 3862 | return 1; |
| 3863 | } |
| 3864 | |
| 3865 | static void |
| 3866 | nfs4_release_reclaim(void) |
| 3867 | { |
| 3868 | struct nfs4_client_reclaim *crp = NULL; |
| 3869 | int i; |
| 3870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3871 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3872 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3873 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3874 | struct nfs4_client_reclaim, cr_strhash); |
| 3875 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3876 | kfree(crp); |
| 3877 | reclaim_str_hashtbl_size--; |
| 3878 | } |
| 3879 | } |
| 3880 | BUG_ON(reclaim_str_hashtbl_size); |
| 3881 | } |
| 3882 | |
| 3883 | /* |
| 3884 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3885 | static struct nfs4_client_reclaim * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3886 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3887 | { |
| 3888 | unsigned int strhashval; |
| 3889 | struct nfs4_client *clp; |
| 3890 | struct nfs4_client_reclaim *crp = NULL; |
| 3891 | |
| 3892 | |
| 3893 | /* find clientid in conf_id_hashtbl */ |
| 3894 | clp = find_confirmed_client(clid); |
| 3895 | if (clp == NULL) |
| 3896 | return NULL; |
| 3897 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3898 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3899 | clp->cl_name.len, clp->cl_name.data, |
| 3900 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | |
| 3902 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3903 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3905 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3906 | return crp; |
| 3907 | } |
| 3908 | } |
| 3909 | return NULL; |
| 3910 | } |
| 3911 | |
| 3912 | /* |
| 3913 | * Called from OPEN. Look for clientid in reclaim list. |
| 3914 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3915 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3917 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3918 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3919 | } |
| 3920 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3921 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3922 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3923 | int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3924 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3925 | { |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3926 | int i, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3927 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3928 | status = nfsd4_init_slabs(); |
| 3929 | if (status) |
| 3930 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3931 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3932 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3933 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3934 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3935 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
Wang Chen | 02cb285 | 2009-04-24 15:41:57 +0800 | [diff] [blame] | 3936 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3937 | } |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 3938 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
| 3939 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3940 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3941 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3942 | } |
| 3943 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3944 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3945 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3946 | } |
| 3947 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3948 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3949 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3950 | } |
| 3951 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3952 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3953 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 3954 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3955 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3956 | INIT_LIST_HEAD(&close_lru); |
| 3957 | INIT_LIST_HEAD(&client_lru); |
| 3958 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3959 | reclaim_str_hashtbl_size = 0; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3960 | return 0; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3961 | } |
| 3962 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3963 | static void |
| 3964 | nfsd4_load_reboot_recovery_data(void) |
| 3965 | { |
| 3966 | int status; |
| 3967 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3968 | nfs4_lock_state(); |
| 3969 | nfsd4_init_recdir(user_recovery_dirname); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3970 | status = nfsd4_recdir_load(); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3971 | nfs4_unlock_state(); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3972 | if (status) |
| 3973 | printk("NFSD: Failure reading reboot recovery data\n"); |
| 3974 | } |
| 3975 | |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3976 | unsigned long |
| 3977 | get_nfs4_grace_period(void) |
| 3978 | { |
| 3979 | return max(user_lease_time, lease_time) * HZ; |
| 3980 | } |
| 3981 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 3982 | /* |
| 3983 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 3984 | * client may quite reasonably hang on to a delegation as long as it has |
| 3985 | * the inode cached. This becomes an obvious problem the first time a |
| 3986 | * client's inode cache approaches the size of the server's total memory. |
| 3987 | * |
| 3988 | * For now we avoid this problem by imposing a hard limit on the number |
| 3989 | * of delegations, which varies according to the server's memory size. |
| 3990 | */ |
| 3991 | static void |
| 3992 | set_max_delegations(void) |
| 3993 | { |
| 3994 | /* |
| 3995 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 3996 | * estimates suggest that in the worst case (where every delegation |
| 3997 | * is for a different inode), a delegation could take about 1.5K, |
| 3998 | * giving a worst case usage of about 6% of memory. |
| 3999 | */ |
| 4000 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 4001 | } |
| 4002 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4003 | /* initialization to perform when the nfsd service is started: */ |
| 4004 | |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4005 | static int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4006 | __nfs4_state_start(void) |
| 4007 | { |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 4008 | unsigned long grace_time; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4010 | boot_time = get_seconds(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4011 | grace_time = get_nfs4_grace_period(); |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 4012 | lease_time = user_lease_time; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4013 | locks_start_grace(&nfsd4_manager); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 4014 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
| 4015 | grace_time/HZ); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 4016 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4017 | if (laundry_wq == NULL) |
| 4018 | return -ENOMEM; |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 4019 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4020 | set_max_delegations(); |
J. Bruce Fields | 80fc015 | 2009-09-15 18:07:35 -0400 | [diff] [blame] | 4021 | return set_callback_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | } |
| 4023 | |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4024 | int |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 4025 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4026 | { |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4027 | int ret; |
| 4028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4029 | if (nfs4_init) |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4030 | return 0; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4031 | nfsd4_load_reboot_recovery_data(); |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4032 | ret = __nfs4_state_start(); |
| 4033 | if (ret) |
| 4034 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4035 | nfs4_init = 1; |
J. Bruce Fields | 29ab23c | 2009-09-15 15:56:50 -0400 | [diff] [blame] | 4036 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4037 | } |
| 4038 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4039 | time_t |
| 4040 | nfs4_lease_time(void) |
| 4041 | { |
| 4042 | return lease_time; |
| 4043 | } |
| 4044 | |
| 4045 | static void |
| 4046 | __nfs4_state_shutdown(void) |
| 4047 | { |
| 4048 | int i; |
| 4049 | struct nfs4_client *clp = NULL; |
| 4050 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4051 | struct list_head *pos, *next, reaplist; |
| 4052 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4053 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4054 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 4055 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 4056 | expire_client(clp); |
| 4057 | } |
| 4058 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 4059 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 4060 | expire_client(clp); |
| 4061 | } |
| 4062 | } |
| 4063 | INIT_LIST_HEAD(&reaplist); |
| 4064 | spin_lock(&recall_lock); |
| 4065 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 4066 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4067 | list_move(&dp->dl_recall_lru, &reaplist); |
| 4068 | } |
| 4069 | spin_unlock(&recall_lock); |
| 4070 | list_for_each_safe(pos, next, &reaplist) { |
| 4071 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4072 | list_del_init(&dp->dl_recall_lru); |
| 4073 | unhash_delegation(dp); |
| 4074 | } |
| 4075 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4076 | nfsd4_shutdown_recdir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4077 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4078 | } |
| 4079 | |
| 4080 | void |
| 4081 | nfs4_state_shutdown(void) |
| 4082 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 4083 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
| 4084 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | 2c5e761 | 2008-11-20 14:36:17 -0600 | [diff] [blame] | 4085 | locks_end_grace(&nfsd4_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4086 | nfs4_lock_state(); |
| 4087 | nfs4_release_reclaim(); |
| 4088 | __nfs4_state_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4089 | nfs4_unlock_state(); |
| 4090 | } |
| 4091 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 4092 | /* |
| 4093 | * user_recovery_dirname is protected by the nfsd_mutex since it's only |
| 4094 | * accessed when nfsd is starting. |
| 4095 | */ |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4096 | static void |
| 4097 | nfs4_set_recdir(char *recdir) |
| 4098 | { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4099 | strcpy(user_recovery_dirname, recdir); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4100 | } |
| 4101 | |
| 4102 | /* |
| 4103 | * Change the NFSv4 recovery directory to recdir. |
| 4104 | */ |
| 4105 | int |
| 4106 | nfs4_reset_recoverydir(char *recdir) |
| 4107 | { |
| 4108 | int status; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4109 | struct path path; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4110 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4111 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4112 | if (status) |
| 4113 | return status; |
| 4114 | status = -ENOTDIR; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4115 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4116 | nfs4_set_recdir(recdir); |
| 4117 | status = 0; |
| 4118 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 4119 | path_put(&path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 4120 | return status; |
| 4121 | } |
| 4122 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 4123 | char * |
| 4124 | nfs4_recoverydir(void) |
| 4125 | { |
| 4126 | return user_recovery_dirname; |
| 4127 | } |
| 4128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4129 | /* |
| 4130 | * Called when leasetime is changed. |
| 4131 | * |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 4132 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
| 4133 | * simulate a reboot. Instead of doing that, we just wait till the next time |
| 4134 | * we start to register any changes in lease time. If the administrator |
| 4135 | * really wants to change the lease time *now*, they can go ahead and bring |
| 4136 | * nfsd down and then back up again after changing the lease time. |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 4137 | * |
| 4138 | * user_lease_time is protected by nfsd_mutex since it's only really accessed |
| 4139 | * when nfsd is starting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4140 | */ |
| 4141 | void |
| 4142 | nfs4_reset_lease(time_t leasetime) |
| 4143 | { |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 4144 | user_lease_time = leasetime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4145 | } |