Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/callback_proc.c |
| 3 | * |
| 4 | * Copyright (C) 2004 Trond Myklebust |
| 5 | * |
| 6 | * NFSv4 callback procedures |
| 7 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/nfs4.h> |
| 9 | #include <linux/nfs_fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 10 | #include <linux/slab.h> |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 11 | #include <linux/rcupdate.h> |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 12 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include "callback.h" |
| 14 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 15 | #include "internal.h" |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 16 | #include "pnfs.h" |
Trond Myklebust | 73e39aa | 2012-11-26 12:49:34 -0500 | [diff] [blame] | 17 | #include "nfs4session.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 19 | #ifdef NFS_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 21 | #endif |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 22 | |
| 23 | __be32 nfs4_callback_getattr(struct cb_getattrargs *args, |
| 24 | struct cb_getattrres *res, |
| 25 | struct cb_process_state *cps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | struct nfs_delegation *delegation; |
| 28 | struct nfs_inode *nfsi; |
| 29 | struct inode *inode; |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 30 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 31 | res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
| 32 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | goto out; |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 34 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 35 | res->bitmap[0] = res->bitmap[1] = 0; |
| 36 | res->status = htonl(NFS4ERR_BADHANDLE); |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 37 | |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 38 | dprintk_rcu("NFS: GETATTR callback request from %s\n", |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 39 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 40 | |
| 41 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | if (inode == NULL) |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 43 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | nfsi = NFS_I(inode); |
Trond Myklebust | 761fe93 | 2010-08-04 09:29:52 -0400 | [diff] [blame] | 45 | rcu_read_lock(); |
| 46 | delegation = rcu_dereference(nfsi->delegation); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
| 48 | goto out_iput; |
| 49 | res->size = i_size_read(inode); |
Trond Myklebust | beb2a5e | 2006-01-03 09:55:37 +0100 | [diff] [blame] | 50 | res->change_attr = delegation->change_attr; |
| 51 | if (nfsi->npages != 0) |
| 52 | res->change_attr++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | res->ctime = inode->i_ctime; |
| 54 | res->mtime = inode->i_mtime; |
| 55 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & |
| 56 | args->bitmap[0]; |
| 57 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & |
| 58 | args->bitmap[1]; |
| 59 | res->status = 0; |
| 60 | out_iput: |
Trond Myklebust | 761fe93 | 2010-08-04 09:29:52 -0400 | [diff] [blame] | 61 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | out: |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 64 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return res->status; |
| 66 | } |
| 67 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 68 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
| 69 | struct cb_process_state *cps) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | struct inode *inode; |
Al Viro | e6f684f | 2006-10-19 23:28:50 -0700 | [diff] [blame] | 72 | __be32 res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 74 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
| 75 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | goto out; |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 77 | |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 78 | dprintk_rcu("NFS: RECALL callback request from %s\n", |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 79 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
Chuck Lever | 1d98fe6 | 2007-12-10 14:57:23 -0500 | [diff] [blame] | 80 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 81 | res = htonl(NFS4ERR_BADHANDLE); |
| 82 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
| 83 | if (inode == NULL) |
| 84 | goto out; |
| 85 | /* Set up a helper thread to actually return the delegation */ |
| 86 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { |
| 87 | case 0: |
| 88 | res = 0; |
| 89 | break; |
| 90 | case -ENOENT: |
Trond Myklebust | 8e663f0 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 91 | res = htonl(NFS4ERR_BAD_STATEID); |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 92 | break; |
| 93 | default: |
| 94 | res = htonl(NFS4ERR_RESOURCE); |
| 95 | } |
| 96 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | out: |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 98 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | return res; |
| 100 | } |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 101 | |
| 102 | #if defined(CONFIG_NFS_V4_1) |
| 103 | |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 104 | /* |
| 105 | * Lookup a layout by filehandle. |
| 106 | * |
| 107 | * Note: gets a refcount on the layout hdr and on its respective inode. |
| 108 | * Caller must put the layout hdr and the inode. |
| 109 | * |
| 110 | * TODO: keep track of all layouts (and delegations) in a hash table |
| 111 | * hashed by filehandle. |
| 112 | */ |
| 113 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh) |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 114 | { |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 115 | struct nfs_server *server; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 116 | struct inode *ino; |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 117 | struct pnfs_layout_hdr *lo; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 118 | |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 119 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 120 | list_for_each_entry(lo, &server->layouts, plh_layouts) { |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 121 | if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 122 | continue; |
| 123 | ino = igrab(lo->plh_inode); |
| 124 | if (!ino) |
| 125 | continue; |
Trond Myklebust | 9c62638 | 2012-09-20 17:31:43 -0400 | [diff] [blame] | 126 | spin_lock(&ino->i_lock); |
| 127 | /* Is this layout in the process of being freed? */ |
| 128 | if (NFS_I(ino)->layout != lo) { |
| 129 | spin_unlock(&ino->i_lock); |
| 130 | iput(ino); |
| 131 | continue; |
| 132 | } |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 133 | pnfs_get_layout_hdr(lo); |
Trond Myklebust | 9c62638 | 2012-09-20 17:31:43 -0400 | [diff] [blame] | 134 | spin_unlock(&ino->i_lock); |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 135 | return lo; |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 136 | } |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 137 | } |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 138 | |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh) |
| 143 | { |
| 144 | struct pnfs_layout_hdr *lo; |
| 145 | |
| 146 | spin_lock(&clp->cl_lock); |
| 147 | rcu_read_lock(); |
| 148 | lo = get_layout_by_fh_locked(clp, fh); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 149 | rcu_read_unlock(); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 150 | spin_unlock(&clp->cl_lock); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 151 | |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 152 | return lo; |
| 153 | } |
| 154 | |
| 155 | static u32 initiate_file_draining(struct nfs_client *clp, |
| 156 | struct cb_layoutrecallargs *args) |
| 157 | { |
| 158 | struct inode *ino; |
| 159 | struct pnfs_layout_hdr *lo; |
| 160 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; |
| 161 | LIST_HEAD(free_me_list); |
| 162 | |
| 163 | lo = get_layout_by_fh(clp, &args->cbl_fh); |
| 164 | if (!lo) |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 165 | return NFS4ERR_NOMATCHING_LAYOUT; |
| 166 | |
Benny Halevy | d36b7cf | 2012-01-22 16:03:39 +0200 | [diff] [blame] | 167 | ino = lo->plh_inode; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 168 | spin_lock(&ino->i_lock); |
| 169 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 170 | pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 171 | &args->cbl_range)) |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 172 | rv = NFS4ERR_DELAY; |
| 173 | else |
| 174 | rv = NFS4ERR_NOMATCHING_LAYOUT; |
| 175 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); |
| 176 | spin_unlock(&ino->i_lock); |
| 177 | pnfs_free_lseg_list(&free_me_list); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 178 | pnfs_put_layout_hdr(lo); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 179 | iput(ino); |
| 180 | return rv; |
| 181 | } |
| 182 | |
| 183 | static u32 initiate_bulk_draining(struct nfs_client *clp, |
| 184 | struct cb_layoutrecallargs *args) |
| 185 | { |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 186 | int stat; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 187 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 188 | if (args->cbl_recall_type == RETURN_FSID) |
| 189 | stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); |
| 190 | else |
| 191 | stat = pnfs_destroy_layouts_byclid(clp, true); |
| 192 | if (stat != 0) |
| 193 | return NFS4ERR_DELAY; |
| 194 | return NFS4ERR_NOMATCHING_LAYOUT; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static u32 do_callback_layoutrecall(struct nfs_client *clp, |
| 198 | struct cb_layoutrecallargs *args) |
| 199 | { |
Trond Myklebust | 0cb3284 | 2012-03-01 11:17:50 -0500 | [diff] [blame] | 200 | u32 res; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 201 | |
| 202 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 203 | if (args->cbl_recall_type == RETURN_FILE) |
| 204 | res = initiate_file_draining(clp, args); |
| 205 | else |
| 206 | res = initiate_bulk_draining(clp, args); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 207 | dprintk("%s returning %i\n", __func__, res); |
| 208 | return res; |
| 209 | |
| 210 | } |
| 211 | |
Fred Isaman | f2a6256 | 2011-01-06 11:36:29 +0000 | [diff] [blame] | 212 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
| 213 | void *dummy, struct cb_process_state *cps) |
| 214 | { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 215 | u32 res; |
| 216 | |
| 217 | dprintk("%s: -->\n", __func__); |
| 218 | |
| 219 | if (cps->clp) |
| 220 | res = do_callback_layoutrecall(cps->clp, args); |
| 221 | else |
| 222 | res = NFS4ERR_OP_NOT_IN_SESSION; |
| 223 | |
| 224 | dprintk("%s: exit with status = %d\n", __func__, res); |
| 225 | return cpu_to_be32(res); |
Fred Isaman | f2a6256 | 2011-01-06 11:36:29 +0000 | [diff] [blame] | 226 | } |
| 227 | |
Alexandros Batsakis | 3684037 | 2011-01-06 11:36:31 +0000 | [diff] [blame] | 228 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
| 229 | { |
| 230 | struct cb_layoutrecallargs args; |
| 231 | |
| 232 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ |
| 233 | memset(&args, 0, sizeof(args)); |
| 234 | args.cbl_recall_type = RETURN_ALL; |
| 235 | /* FIXME we ignore errors, what should we do? */ |
| 236 | do_callback_layoutrecall(clp, &args); |
| 237 | } |
| 238 | |
Marc Eshel | 1be5683 | 2011-05-22 19:47:09 +0300 | [diff] [blame] | 239 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
| 240 | void *dummy, struct cb_process_state *cps) |
| 241 | { |
| 242 | int i; |
| 243 | __be32 res = 0; |
| 244 | struct nfs_client *clp = cps->clp; |
| 245 | struct nfs_server *server = NULL; |
| 246 | |
| 247 | dprintk("%s: -->\n", __func__); |
| 248 | |
| 249 | if (!clp) { |
| 250 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
| 251 | goto out; |
| 252 | } |
| 253 | |
| 254 | for (i = 0; i < args->ndevs; i++) { |
| 255 | struct cb_devicenotifyitem *dev = &args->devs[i]; |
| 256 | |
| 257 | if (!server || |
| 258 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { |
| 259 | rcu_read_lock(); |
| 260 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 261 | if (server->pnfs_curr_ld && |
| 262 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { |
| 263 | rcu_read_unlock(); |
| 264 | goto found; |
| 265 | } |
| 266 | rcu_read_unlock(); |
| 267 | dprintk("%s: layout type %u not found\n", |
| 268 | __func__, dev->cbd_layout_type); |
| 269 | continue; |
| 270 | } |
| 271 | |
| 272 | found: |
| 273 | if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) |
| 274 | dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, " |
| 275 | "deleting instead\n", __func__); |
Benny Halevy | 35c8bb5 | 2011-05-24 18:04:02 +0300 | [diff] [blame] | 276 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
Marc Eshel | 1be5683 | 2011-05-22 19:47:09 +0300 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | out: |
| 280 | kfree(args->devs); |
| 281 | dprintk("%s: exit with status = %u\n", |
| 282 | __func__, be32_to_cpu(res)); |
| 283 | return res; |
| 284 | } |
| 285 | |
Ricardo Labiaga | 963891a | 2009-04-01 09:23:34 -0400 | [diff] [blame] | 286 | /* |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 287 | * Validate the sequenceID sent by the server. |
| 288 | * Return success if the sequenceID is one more than what we last saw on |
| 289 | * this slot, accounting for wraparound. Increments the slot's sequence. |
| 290 | * |
Andy Adamson | 4911096 | 2010-01-14 17:45:08 -0500 | [diff] [blame] | 291 | * We don't yet implement a duplicate request cache, instead we set the |
| 292 | * back channel ca_maxresponsesize_cached to zero. This is OK for now |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 293 | * since we only currently implement idempotent callbacks anyway. |
| 294 | * |
| 295 | * We have a single slot backchannel at this time, so we don't bother |
| 296 | * checking the used_slots bit array on the table. The lower layer guarantees |
| 297 | * a single outstanding callback request at a time. |
| 298 | */ |
Andy Adamson | 9733f0d | 2010-01-22 12:03:08 -0500 | [diff] [blame] | 299 | static __be32 |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 300 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 301 | { |
| 302 | struct nfs4_slot *slot; |
| 303 | |
| 304 | dprintk("%s enter. slotid %d seqid %d\n", |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 305 | __func__, args->csa_slotid, args->csa_sequenceid); |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 306 | |
Andy Adamson | 61f2e51 | 2011-11-09 13:58:20 -0500 | [diff] [blame] | 307 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 308 | return htonl(NFS4ERR_BADSLOT); |
| 309 | |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 310 | slot = tbl->slots + args->csa_slotid; |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 311 | dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); |
| 312 | |
| 313 | /* Normal */ |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 314 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 315 | slot->seq_nr++; |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 316 | goto out_ok; |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | /* Replay */ |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 320 | if (args->csa_sequenceid == slot->seq_nr) { |
Andy Adamson | 4911096 | 2010-01-14 17:45:08 -0500 | [diff] [blame] | 321 | dprintk("%s seqid %d is a replay\n", |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 322 | __func__, args->csa_sequenceid); |
Andy Adamson | 4911096 | 2010-01-14 17:45:08 -0500 | [diff] [blame] | 323 | /* Signal process_op to set this error on next op */ |
| 324 | if (args->csa_cachethis == 0) |
| 325 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); |
| 326 | |
| 327 | /* The ca_maxresponsesize_cached is 0 with no DRC */ |
| 328 | else if (args->csa_cachethis == 1) |
| 329 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* Wraparound */ |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 333 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 334 | slot->seq_nr = 1; |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 335 | goto out_ok; |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | /* Misordered request */ |
| 339 | return htonl(NFS4ERR_SEQ_MISORDERED); |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 340 | out_ok: |
| 341 | tbl->highest_used_slotid = args->csa_slotid; |
| 342 | return htonl(NFS4_OK); |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | /* |
Mike Sager | a7989c3 | 2010-01-19 12:54:40 -0500 | [diff] [blame] | 346 | * For each referring call triple, check the session's slot table for |
| 347 | * a match. If the slot is in use and the sequence numbers match, the |
| 348 | * client is still waiting for a response to the original request. |
| 349 | */ |
| 350 | static bool referring_call_exists(struct nfs_client *clp, |
| 351 | uint32_t nrclists, |
| 352 | struct referring_call_list *rclists) |
| 353 | { |
| 354 | bool status = 0; |
| 355 | int i, j; |
| 356 | struct nfs4_session *session; |
| 357 | struct nfs4_slot_table *tbl; |
| 358 | struct referring_call_list *rclist; |
| 359 | struct referring_call *ref; |
| 360 | |
| 361 | /* |
| 362 | * XXX When client trunking is implemented, this becomes |
| 363 | * a session lookup from within the loop |
| 364 | */ |
| 365 | session = clp->cl_session; |
| 366 | tbl = &session->fc_slot_table; |
| 367 | |
| 368 | for (i = 0; i < nrclists; i++) { |
| 369 | rclist = &rclists[i]; |
| 370 | if (memcmp(session->sess_id.data, |
| 371 | rclist->rcl_sessionid.data, |
| 372 | NFS4_MAX_SESSIONID_LEN) != 0) |
| 373 | continue; |
| 374 | |
| 375 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { |
| 376 | ref = &rclist->rcl_refcalls[j]; |
| 377 | |
| 378 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " |
| 379 | "slotid %u\n", __func__, |
| 380 | ((u32 *)&rclist->rcl_sessionid.data)[0], |
| 381 | ((u32 *)&rclist->rcl_sessionid.data)[1], |
| 382 | ((u32 *)&rclist->rcl_sessionid.data)[2], |
| 383 | ((u32 *)&rclist->rcl_sessionid.data)[3], |
| 384 | ref->rc_sequenceid, ref->rc_slotid); |
| 385 | |
| 386 | spin_lock(&tbl->slot_tbl_lock); |
| 387 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && |
| 388 | tbl->slots[ref->rc_slotid].seq_nr == |
| 389 | ref->rc_sequenceid); |
| 390 | spin_unlock(&tbl->slot_tbl_lock); |
| 391 | if (status) |
| 392 | goto out; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | out: |
| 397 | return status; |
| 398 | } |
| 399 | |
Andy Adamson | 9733f0d | 2010-01-22 12:03:08 -0500 | [diff] [blame] | 400 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 401 | struct cb_sequenceres *res, |
| 402 | struct cb_process_state *cps) |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 403 | { |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 404 | struct nfs4_slot_table *tbl; |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 405 | struct nfs_client *clp; |
Andy Adamson | 9733f0d | 2010-01-22 12:03:08 -0500 | [diff] [blame] | 406 | int i; |
Andy Adamson | 778be23 | 2011-01-25 15:38:01 +0000 | [diff] [blame] | 407 | __be32 status = htonl(NFS4ERR_BADSESSION); |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 408 | |
Stanislav Kinsbursky | c7add9a | 2012-01-26 15:11:49 +0400 | [diff] [blame] | 409 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid); |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 410 | if (clp == NULL) |
| 411 | goto out; |
| 412 | |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 413 | tbl = &clp->cl_session->bc_slot_table; |
| 414 | |
| 415 | spin_lock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 416 | /* state manager is resetting the session */ |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 417 | if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 418 | spin_unlock(&tbl->slot_tbl_lock); |
| 419 | status = htonl(NFS4ERR_DELAY); |
Trond Myklebust | 910ac68 | 2011-08-02 14:46:52 -0400 | [diff] [blame] | 420 | /* Return NFS4ERR_BADSESSION if we're draining the session |
| 421 | * in order to reset it. |
| 422 | */ |
| 423 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
| 424 | status = htonl(NFS4ERR_BADSESSION); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 425 | goto out; |
| 426 | } |
| 427 | |
Andy Adamson | b2f28bd | 2010-01-14 17:45:07 -0500 | [diff] [blame] | 428 | status = validate_seqid(&clp->cl_session->bc_slot_table, args); |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 429 | spin_unlock(&tbl->slot_tbl_lock); |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 430 | if (status) |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 431 | goto out; |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 432 | |
Trond Myklebust | 55a6739 | 2011-08-02 14:46:29 -0400 | [diff] [blame] | 433 | cps->slotid = args->csa_slotid; |
| 434 | |
Mike Sager | 72ce2b3 | 2010-01-19 12:54:41 -0500 | [diff] [blame] | 435 | /* |
| 436 | * Check for pending referring calls. If a match is found, a |
| 437 | * related callback was received before the response to the original |
| 438 | * call. |
| 439 | */ |
| 440 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { |
| 441 | status = htonl(NFS4ERR_DELAY); |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 442 | goto out; |
Mike Sager | 72ce2b3 | 2010-01-19 12:54:41 -0500 | [diff] [blame] | 443 | } |
| 444 | |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 445 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
| 446 | sizeof(res->csr_sessionid)); |
| 447 | res->csr_sequenceid = args->csa_sequenceid; |
| 448 | res->csr_slotid = args->csa_slotid; |
| 449 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; |
| 450 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; |
| 451 | |
Ricardo Labiaga | 68f3f90 | 2009-04-01 09:23:35 -0400 | [diff] [blame] | 452 | out: |
Andy Adamson | 2c4cdf8 | 2011-01-25 15:38:02 +0000 | [diff] [blame] | 453 | cps->clp = clp; /* put in nfs4_callback_compound */ |
Mike Sager | 72ce2b3 | 2010-01-19 12:54:41 -0500 | [diff] [blame] | 454 | for (i = 0; i < args->csa_nrclists; i++) |
| 455 | kfree(args->csa_rclists[i].rcl_refcalls); |
| 456 | kfree(args->csa_rclists); |
| 457 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 458 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
| 459 | cps->drc_status = status; |
| 460 | status = 0; |
| 461 | } else |
Andy Adamson | 4911096 | 2010-01-14 17:45:08 -0500 | [diff] [blame] | 462 | res->csr_status = status; |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 463 | |
Andy Adamson | 4911096 | 2010-01-14 17:45:08 -0500 | [diff] [blame] | 464 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
| 465 | ntohl(status), ntohl(res->csr_status)); |
| 466 | return status; |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 467 | } |
| 468 | |
Alexandros Batsakis | 3684037 | 2011-01-06 11:36:31 +0000 | [diff] [blame] | 469 | static bool |
| 470 | validate_bitmap_values(unsigned long mask) |
| 471 | { |
| 472 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; |
| 473 | } |
| 474 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 475 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
| 476 | struct cb_process_state *cps) |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 477 | { |
Andy Adamson | 9733f0d | 2010-01-22 12:03:08 -0500 | [diff] [blame] | 478 | __be32 status; |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 479 | fmode_t flags = 0; |
| 480 | |
Alexandros Batsakis | 3684037 | 2011-01-06 11:36:31 +0000 | [diff] [blame] | 481 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 482 | if (!cps->clp) /* set in cb_sequence */ |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 483 | goto out; |
| 484 | |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 485 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 486 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 487 | |
Alexandros Batsakis | 3684037 | 2011-01-06 11:36:31 +0000 | [diff] [blame] | 488 | status = cpu_to_be32(NFS4ERR_INVAL); |
| 489 | if (!validate_bitmap_values(args->craa_type_mask)) |
| 490 | goto out; |
| 491 | |
| 492 | status = cpu_to_be32(NFS4_OK); |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 493 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
| 494 | &args->craa_type_mask)) |
| 495 | flags = FMODE_READ; |
| 496 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) |
| 497 | &args->craa_type_mask)) |
| 498 | flags |= FMODE_WRITE; |
Alexandros Batsakis | 3684037 | 2011-01-06 11:36:31 +0000 | [diff] [blame] | 499 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
| 500 | &args->craa_type_mask)) |
| 501 | pnfs_recall_all_layouts(cps->clp); |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 502 | if (flags) |
Trond Myklebust | 826e001 | 2013-04-03 19:27:52 -0400 | [diff] [blame] | 503 | nfs_expire_unused_delegation_types(cps->clp, flags); |
Alexandros Batsakis | 31f0960 | 2009-12-05 13:27:02 -0500 | [diff] [blame] | 504 | out: |
| 505 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
| 506 | return status; |
| 507 | } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 508 | |
| 509 | /* Reduce the fore channel's max_slots to the target value */ |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 510 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
| 511 | struct cb_process_state *cps) |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 512 | { |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 513 | struct nfs4_slot_table *fc_tbl; |
Andy Adamson | 9733f0d | 2010-01-22 12:03:08 -0500 | [diff] [blame] | 514 | __be32 status; |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 515 | |
| 516 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 517 | if (!cps->clp) /* set in cb_sequence */ |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 518 | goto out; |
| 519 | |
Trond Myklebust | d5fb4ce | 2012-11-20 20:24:02 -0500 | [diff] [blame] | 520 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %d\n", |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 521 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
Trond Myklebust | d5fb4ce | 2012-11-20 20:24:02 -0500 | [diff] [blame] | 522 | args->crsa_target_highest_slotid); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 523 | |
Andy Adamson | c36fca5 | 2011-01-06 02:04:32 +0000 | [diff] [blame] | 524 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 525 | |
Andy Adamson | bae0ac0 | 2010-01-21 14:19:16 -0500 | [diff] [blame] | 526 | status = htonl(NFS4_OK); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 527 | |
Trond Myklebust | d5fb4ce | 2012-11-20 20:24:02 -0500 | [diff] [blame] | 528 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
Trond Myklebust | ac07483 | 2012-11-21 09:06:11 -0500 | [diff] [blame] | 529 | nfs41_server_notify_target_slotid_update(cps->clp); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 530 | out: |
| 531 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); |
| 532 | return status; |
| 533 | } |
Benny Halevy | d49433e | 2009-04-01 09:23:25 -0400 | [diff] [blame] | 534 | #endif /* CONFIG_NFS_V4_1 */ |