David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 1 | /* AFS File Server client stubs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 3 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/sched.h> |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 14 | #include <linux/circ_buf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include "internal.h" |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 16 | #include "afs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | /* |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 19 | * decode an AFSFid block |
| 20 | */ |
| 21 | static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid) |
| 22 | { |
| 23 | const __be32 *bp = *_bp; |
| 24 | |
| 25 | fid->vid = ntohl(*bp++); |
| 26 | fid->vnode = ntohl(*bp++); |
| 27 | fid->unique = ntohl(*bp++); |
| 28 | *_bp = bp; |
| 29 | } |
| 30 | |
| 31 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 32 | * decode an AFSFetchStatus block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 34 | static void xdr_decode_AFSFetchStatus(const __be32 **_bp, |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 35 | struct afs_file_status *status, |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 36 | struct afs_vnode *vnode, |
| 37 | afs_dataversion_t *store_version) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | { |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 39 | afs_dataversion_t expected_version; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 40 | const __be32 *bp = *_bp; |
| 41 | umode_t mode; |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 42 | u64 data_version, size; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 43 | u32 changed = 0; /* becomes non-zero if ctime-type changes seen */ |
| 44 | |
| 45 | #define EXTRACT(DST) \ |
| 46 | do { \ |
| 47 | u32 x = ntohl(*bp++); \ |
| 48 | changed |= DST - x; \ |
| 49 | DST = x; \ |
| 50 | } while (0) |
| 51 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 52 | status->if_version = ntohl(*bp++); |
| 53 | EXTRACT(status->type); |
| 54 | EXTRACT(status->nlink); |
| 55 | size = ntohl(*bp++); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 56 | data_version = ntohl(*bp++); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 57 | EXTRACT(status->author); |
| 58 | EXTRACT(status->owner); |
| 59 | EXTRACT(status->caller_access); /* call ticket dependent */ |
| 60 | EXTRACT(status->anon_access); |
| 61 | EXTRACT(status->mode); |
| 62 | EXTRACT(status->parent.vnode); |
| 63 | EXTRACT(status->parent.unique); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 64 | bp++; /* seg size */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 65 | status->mtime_client = ntohl(*bp++); |
| 66 | status->mtime_server = ntohl(*bp++); |
| 67 | EXTRACT(status->group); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 68 | bp++; /* sync counter */ |
| 69 | data_version |= (u64) ntohl(*bp++) << 32; |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 70 | bp++; /* lock count */ |
| 71 | size |= (u64) ntohl(*bp++) << 32; |
| 72 | bp++; /* spare 4 */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 73 | *_bp = bp; |
| 74 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 75 | if (size != status->size) { |
| 76 | status->size = size; |
| 77 | changed |= true; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 78 | } |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 79 | status->mode &= S_IALLUGO; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 80 | |
| 81 | _debug("vnode time %lx, %lx", |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 82 | status->mtime_client, status->mtime_server); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 83 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 84 | if (vnode) { |
| 85 | status->parent.vid = vnode->fid.vid; |
| 86 | if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { |
| 87 | _debug("vnode changed"); |
| 88 | i_size_write(&vnode->vfs_inode, size); |
| 89 | vnode->vfs_inode.i_uid = status->owner; |
| 90 | vnode->vfs_inode.i_gid = status->group; |
| 91 | vnode->vfs_inode.i_version = vnode->fid.unique; |
| 92 | vnode->vfs_inode.i_nlink = status->nlink; |
| 93 | |
| 94 | mode = vnode->vfs_inode.i_mode; |
| 95 | mode &= ~S_IALLUGO; |
| 96 | mode |= status->mode; |
| 97 | barrier(); |
| 98 | vnode->vfs_inode.i_mode = mode; |
| 99 | } |
| 100 | |
| 101 | vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server; |
| 102 | vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime; |
| 103 | vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime; |
| 104 | } |
| 105 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 106 | expected_version = status->data_version; |
| 107 | if (store_version) |
| 108 | expected_version = *store_version; |
| 109 | |
| 110 | if (expected_version != data_version) { |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 111 | status->data_version = data_version; |
| 112 | if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { |
| 113 | _debug("vnode modified %llx on {%x:%u}", |
David S. Miller | ba3e0e1 | 2007-04-26 16:06:22 -0700 | [diff] [blame] | 114 | (unsigned long long) data_version, |
| 115 | vnode->fid.vid, vnode->fid.vnode); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 116 | set_bit(AFS_VNODE_MODIFIED, &vnode->flags); |
| 117 | set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags); |
| 118 | } |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 119 | } else if (store_version) { |
| 120 | status->data_version = data_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 125 | * decode an AFSCallBack block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 127 | static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | { |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 129 | const __be32 *bp = *_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 131 | vnode->cb_version = ntohl(*bp++); |
| 132 | vnode->cb_expiry = ntohl(*bp++); |
| 133 | vnode->cb_type = ntohl(*bp++); |
| 134 | vnode->cb_expires = vnode->cb_expiry + get_seconds(); |
| 135 | *_bp = bp; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 136 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 138 | static void xdr_decode_AFSCallBack_raw(const __be32 **_bp, |
| 139 | struct afs_callback *cb) |
| 140 | { |
| 141 | const __be32 *bp = *_bp; |
| 142 | |
| 143 | cb->version = ntohl(*bp++); |
| 144 | cb->expiry = ntohl(*bp++); |
| 145 | cb->type = ntohl(*bp++); |
| 146 | *_bp = bp; |
| 147 | } |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 150 | * decode an AFSVolSync block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 152 | static void xdr_decode_AFSVolSync(const __be32 **_bp, |
| 153 | struct afs_volsync *volsync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 155 | const __be32 *bp = *_bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 157 | volsync->creation = ntohl(*bp++); |
| 158 | bp++; /* spare2 */ |
| 159 | bp++; /* spare3 */ |
| 160 | bp++; /* spare4 */ |
| 161 | bp++; /* spare5 */ |
| 162 | bp++; /* spare6 */ |
| 163 | *_bp = bp; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 164 | } |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 165 | |
| 166 | /* |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 167 | * encode the requested attributes into an AFSStoreStatus block |
| 168 | */ |
| 169 | static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr) |
| 170 | { |
| 171 | __be32 *bp = *_bp; |
| 172 | u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0; |
| 173 | |
| 174 | mask = 0; |
| 175 | if (attr->ia_valid & ATTR_MTIME) { |
| 176 | mask |= AFS_SET_MTIME; |
| 177 | mtime = attr->ia_mtime.tv_sec; |
| 178 | } |
| 179 | |
| 180 | if (attr->ia_valid & ATTR_UID) { |
| 181 | mask |= AFS_SET_OWNER; |
| 182 | owner = attr->ia_uid; |
| 183 | } |
| 184 | |
| 185 | if (attr->ia_valid & ATTR_GID) { |
| 186 | mask |= AFS_SET_GROUP; |
| 187 | group = attr->ia_gid; |
| 188 | } |
| 189 | |
| 190 | if (attr->ia_valid & ATTR_MODE) { |
| 191 | mask |= AFS_SET_MODE; |
| 192 | mode = attr->ia_mode & S_IALLUGO; |
| 193 | } |
| 194 | |
| 195 | *bp++ = htonl(mask); |
| 196 | *bp++ = htonl(mtime); |
| 197 | *bp++ = htonl(owner); |
| 198 | *bp++ = htonl(group); |
| 199 | *bp++ = htonl(mode); |
| 200 | *bp++ = 0; /* segment size */ |
| 201 | *_bp = bp; |
| 202 | } |
| 203 | |
| 204 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 205 | * deliver reply data to an FS.FetchStatus |
| 206 | */ |
| 207 | static int afs_deliver_fs_fetch_status(struct afs_call *call, |
| 208 | struct sk_buff *skb, bool last) |
| 209 | { |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 210 | struct afs_vnode *vnode = call->reply; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 211 | const __be32 *bp; |
| 212 | |
| 213 | _enter(",,%u", last); |
| 214 | |
| 215 | afs_transfer_reply(call, skb); |
| 216 | if (!last) |
| 217 | return 0; |
| 218 | |
| 219 | if (call->reply_size != call->reply_max) |
| 220 | return -EBADMSG; |
| 221 | |
| 222 | /* unmarshall the reply once we've received all of it */ |
| 223 | bp = call->buffer; |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 224 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 225 | xdr_decode_AFSCallBack(&bp, vnode); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 226 | if (call->reply2) |
| 227 | xdr_decode_AFSVolSync(&bp, call->reply2); |
| 228 | |
| 229 | _leave(" = 0 [done]"); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * FS.FetchStatus operation type |
| 235 | */ |
| 236 | static const struct afs_call_type afs_RXFSFetchStatus = { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 237 | .name = "FS.FetchStatus", |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 238 | .deliver = afs_deliver_fs_fetch_status, |
| 239 | .abort_to_error = afs_abort_to_error, |
| 240 | .destructor = afs_flat_call_destructor, |
| 241 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /* |
| 244 | * fetch the status information for a file |
| 245 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 246 | int afs_fs_fetch_file_status(struct afs_server *server, |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 247 | struct key *key, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 248 | struct afs_vnode *vnode, |
| 249 | struct afs_volsync *volsync, |
| 250 | const struct afs_wait_mode *wait_mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | { |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 252 | struct afs_call *call; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | __be32 *bp; |
| 254 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 255 | _enter(",%x,{%x:%u},,", |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 256 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 258 | call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 259 | if (!call) |
| 260 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 262 | call->key = key; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 263 | call->reply = vnode; |
| 264 | call->reply2 = volsync; |
| 265 | call->service_id = FS_SERVICE; |
| 266 | call->port = htons(AFS_FS_PORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | /* marshall the parameters */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 269 | bp = call->request; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | bp[0] = htonl(FSFETCHSTATUS); |
| 271 | bp[1] = htonl(vnode->fid.vid); |
| 272 | bp[2] = htonl(vnode->fid.vnode); |
| 273 | bp[3] = htonl(vnode->fid.unique); |
| 274 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 275 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 276 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 279 | * deliver reply data to an FS.FetchData |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 281 | static int afs_deliver_fs_fetch_data(struct afs_call *call, |
| 282 | struct sk_buff *skb, bool last) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 284 | struct afs_vnode *vnode = call->reply; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 285 | const __be32 *bp; |
| 286 | struct page *page; |
| 287 | void *buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | int ret; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 289 | |
| 290 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 291 | |
| 292 | switch (call->unmarshall) { |
| 293 | case 0: |
| 294 | call->offset = 0; |
| 295 | call->unmarshall++; |
| 296 | |
| 297 | /* extract the returned data length */ |
| 298 | case 1: |
| 299 | _debug("extract data length"); |
| 300 | ret = afs_extract_data(call, skb, last, &call->tmp, 4); |
| 301 | switch (ret) { |
| 302 | case 0: break; |
| 303 | case -EAGAIN: return 0; |
| 304 | default: return ret; |
| 305 | } |
| 306 | |
| 307 | call->count = ntohl(call->tmp); |
| 308 | _debug("DATA length: %u", call->count); |
| 309 | if (call->count > PAGE_SIZE) |
| 310 | return -EBADMSG; |
| 311 | call->offset = 0; |
| 312 | call->unmarshall++; |
| 313 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 314 | /* extract the returned data */ |
| 315 | case 2: |
| 316 | _debug("extract data"); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 317 | if (call->count > 0) { |
| 318 | page = call->reply3; |
| 319 | buffer = kmap_atomic(page, KM_USER0); |
| 320 | ret = afs_extract_data(call, skb, last, buffer, |
| 321 | call->count); |
| 322 | kunmap_atomic(buffer, KM_USER0); |
| 323 | switch (ret) { |
| 324 | case 0: break; |
| 325 | case -EAGAIN: return 0; |
| 326 | default: return ret; |
| 327 | } |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | call->offset = 0; |
| 331 | call->unmarshall++; |
| 332 | |
| 333 | /* extract the metadata */ |
| 334 | case 3: |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 335 | ret = afs_extract_data(call, skb, last, call->buffer, |
| 336 | (21 + 3 + 6) * 4); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 337 | switch (ret) { |
| 338 | case 0: break; |
| 339 | case -EAGAIN: return 0; |
| 340 | default: return ret; |
| 341 | } |
| 342 | |
| 343 | bp = call->buffer; |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 344 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 345 | xdr_decode_AFSCallBack(&bp, vnode); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 346 | if (call->reply2) |
| 347 | xdr_decode_AFSVolSync(&bp, call->reply2); |
| 348 | |
| 349 | call->offset = 0; |
| 350 | call->unmarshall++; |
| 351 | |
| 352 | case 4: |
| 353 | _debug("trailer"); |
| 354 | if (skb->len != 0) |
| 355 | return -EBADMSG; |
| 356 | break; |
| 357 | } |
| 358 | |
| 359 | if (!last) |
| 360 | return 0; |
| 361 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 362 | if (call->count < PAGE_SIZE) { |
| 363 | _debug("clear"); |
| 364 | page = call->reply3; |
| 365 | buffer = kmap_atomic(page, KM_USER0); |
| 366 | memset(buffer + call->count, 0, PAGE_SIZE - call->count); |
| 367 | kunmap_atomic(buffer, KM_USER0); |
| 368 | } |
| 369 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 370 | _leave(" = 0 [done]"); |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * FS.FetchData operation type |
| 376 | */ |
| 377 | static const struct afs_call_type afs_RXFSFetchData = { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 378 | .name = "FS.FetchData", |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 379 | .deliver = afs_deliver_fs_fetch_data, |
| 380 | .abort_to_error = afs_abort_to_error, |
| 381 | .destructor = afs_flat_call_destructor, |
| 382 | }; |
| 383 | |
| 384 | /* |
| 385 | * fetch data from a file |
| 386 | */ |
| 387 | int afs_fs_fetch_data(struct afs_server *server, |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 388 | struct key *key, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 389 | struct afs_vnode *vnode, |
| 390 | off_t offset, size_t length, |
| 391 | struct page *buffer, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 392 | const struct afs_wait_mode *wait_mode) |
| 393 | { |
| 394 | struct afs_call *call; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | __be32 *bp; |
| 396 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 397 | _enter(""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 399 | call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 400 | if (!call) |
| 401 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 403 | call->key = key; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 404 | call->reply = vnode; |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 405 | call->reply2 = NULL; /* volsync */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 406 | call->reply3 = buffer; |
| 407 | call->service_id = FS_SERVICE; |
| 408 | call->port = htons(AFS_FS_PORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | /* marshall the parameters */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 411 | bp = call->request; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | bp[0] = htonl(FSFETCHDATA); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 413 | bp[1] = htonl(vnode->fid.vid); |
| 414 | bp[2] = htonl(vnode->fid.vnode); |
| 415 | bp[3] = htonl(vnode->fid.unique); |
| 416 | bp[4] = htonl(offset); |
| 417 | bp[5] = htonl(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 419 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 420 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 423 | * deliver reply data to an FS.GiveUpCallBacks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 425 | static int afs_deliver_fs_give_up_callbacks(struct afs_call *call, |
| 426 | struct sk_buff *skb, bool last) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 428 | _enter(",{%u},%d", skb->len, last); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 430 | if (skb->len > 0) |
| 431 | return -EBADMSG; /* shouldn't be any reply data */ |
| 432 | return 0; |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 435 | /* |
| 436 | * FS.GiveUpCallBacks operation type |
| 437 | */ |
| 438 | static const struct afs_call_type afs_RXFSGiveUpCallBacks = { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 439 | .name = "FS.GiveUpCallBacks", |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 440 | .deliver = afs_deliver_fs_give_up_callbacks, |
| 441 | .abort_to_error = afs_abort_to_error, |
| 442 | .destructor = afs_flat_call_destructor, |
| 443 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 445 | /* |
| 446 | * give up a set of callbacks |
| 447 | * - the callbacks are held in the server->cb_break ring |
| 448 | */ |
| 449 | int afs_fs_give_up_callbacks(struct afs_server *server, |
| 450 | const struct afs_wait_mode *wait_mode) |
| 451 | { |
| 452 | struct afs_call *call; |
| 453 | size_t ncallbacks; |
| 454 | __be32 *bp, *tp; |
| 455 | int loop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 457 | ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail, |
| 458 | ARRAY_SIZE(server->cb_break)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 460 | _enter("{%zu},", ncallbacks); |
| 461 | |
| 462 | if (ncallbacks == 0) |
| 463 | return 0; |
| 464 | if (ncallbacks > AFSCBMAX) |
| 465 | ncallbacks = AFSCBMAX; |
| 466 | |
| 467 | _debug("break %zu callbacks", ncallbacks); |
| 468 | |
| 469 | call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks, |
| 470 | 12 + ncallbacks * 6 * 4, 0); |
| 471 | if (!call) |
| 472 | return -ENOMEM; |
| 473 | |
| 474 | call->service_id = FS_SERVICE; |
| 475 | call->port = htons(AFS_FS_PORT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | /* marshall the parameters */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 478 | bp = call->request; |
| 479 | tp = bp + 2 + ncallbacks * 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | *bp++ = htonl(FSGIVEUPCALLBACKS); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 481 | *bp++ = htonl(ncallbacks); |
| 482 | *tp++ = htonl(ncallbacks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 484 | atomic_sub(ncallbacks, &server->cb_break_n); |
| 485 | for (loop = ncallbacks; loop > 0; loop--) { |
| 486 | struct afs_callback *cb = |
| 487 | &server->cb_break[server->cb_break_tail]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 489 | *bp++ = htonl(cb->fid.vid); |
| 490 | *bp++ = htonl(cb->fid.vnode); |
| 491 | *bp++ = htonl(cb->fid.unique); |
| 492 | *tp++ = htonl(cb->version); |
| 493 | *tp++ = htonl(cb->expiry); |
| 494 | *tp++ = htonl(cb->type); |
| 495 | smp_mb(); |
| 496 | server->cb_break_tail = |
| 497 | (server->cb_break_tail + 1) & |
| 498 | (ARRAY_SIZE(server->cb_break) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 501 | ASSERT(ncallbacks > 0); |
| 502 | wake_up_nr(&server->cb_break_waitq, ncallbacks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 504 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 505 | } |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 506 | |
| 507 | /* |
| 508 | * deliver reply data to an FS.CreateFile or an FS.MakeDir |
| 509 | */ |
| 510 | static int afs_deliver_fs_create_vnode(struct afs_call *call, |
| 511 | struct sk_buff *skb, bool last) |
| 512 | { |
| 513 | struct afs_vnode *vnode = call->reply; |
| 514 | const __be32 *bp; |
| 515 | |
| 516 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 517 | |
| 518 | afs_transfer_reply(call, skb); |
| 519 | if (!last) |
| 520 | return 0; |
| 521 | |
| 522 | if (call->reply_size != call->reply_max) |
| 523 | return -EBADMSG; |
| 524 | |
| 525 | /* unmarshall the reply once we've received all of it */ |
| 526 | bp = call->buffer; |
| 527 | xdr_decode_AFSFid(&bp, call->reply2); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 528 | xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL); |
| 529 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 530 | xdr_decode_AFSCallBack_raw(&bp, call->reply4); |
| 531 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 532 | |
| 533 | _leave(" = 0 [done]"); |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | /* |
| 538 | * FS.CreateFile and FS.MakeDir operation type |
| 539 | */ |
| 540 | static const struct afs_call_type afs_RXFSCreateXXXX = { |
| 541 | .name = "FS.CreateXXXX", |
| 542 | .deliver = afs_deliver_fs_create_vnode, |
| 543 | .abort_to_error = afs_abort_to_error, |
| 544 | .destructor = afs_flat_call_destructor, |
| 545 | }; |
| 546 | |
| 547 | /* |
| 548 | * create a file or make a directory |
| 549 | */ |
| 550 | int afs_fs_create(struct afs_server *server, |
| 551 | struct key *key, |
| 552 | struct afs_vnode *vnode, |
| 553 | const char *name, |
| 554 | umode_t mode, |
| 555 | struct afs_fid *newfid, |
| 556 | struct afs_file_status *newstatus, |
| 557 | struct afs_callback *newcb, |
| 558 | const struct afs_wait_mode *wait_mode) |
| 559 | { |
| 560 | struct afs_call *call; |
| 561 | size_t namesz, reqsz, padsz; |
| 562 | __be32 *bp; |
| 563 | |
| 564 | _enter(""); |
| 565 | |
| 566 | namesz = strlen(name); |
| 567 | padsz = (4 - (namesz & 3)) & 3; |
| 568 | reqsz = (5 * 4) + namesz + padsz + (6 * 4); |
| 569 | |
| 570 | call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz, |
| 571 | (3 + 21 + 21 + 3 + 6) * 4); |
| 572 | if (!call) |
| 573 | return -ENOMEM; |
| 574 | |
| 575 | call->key = key; |
| 576 | call->reply = vnode; |
| 577 | call->reply2 = newfid; |
| 578 | call->reply3 = newstatus; |
| 579 | call->reply4 = newcb; |
| 580 | call->service_id = FS_SERVICE; |
| 581 | call->port = htons(AFS_FS_PORT); |
| 582 | |
| 583 | /* marshall the parameters */ |
| 584 | bp = call->request; |
| 585 | *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE); |
| 586 | *bp++ = htonl(vnode->fid.vid); |
| 587 | *bp++ = htonl(vnode->fid.vnode); |
| 588 | *bp++ = htonl(vnode->fid.unique); |
| 589 | *bp++ = htonl(namesz); |
| 590 | memcpy(bp, name, namesz); |
| 591 | bp = (void *) bp + namesz; |
| 592 | if (padsz > 0) { |
| 593 | memset(bp, 0, padsz); |
| 594 | bp = (void *) bp + padsz; |
| 595 | } |
| 596 | *bp++ = htonl(AFS_SET_MODE); |
| 597 | *bp++ = 0; /* mtime */ |
| 598 | *bp++ = 0; /* owner */ |
| 599 | *bp++ = 0; /* group */ |
| 600 | *bp++ = htonl(mode & S_IALLUGO); /* unix mode */ |
| 601 | *bp++ = 0; /* segment size */ |
| 602 | |
| 603 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 604 | } |
| 605 | |
| 606 | /* |
| 607 | * deliver reply data to an FS.RemoveFile or FS.RemoveDir |
| 608 | */ |
| 609 | static int afs_deliver_fs_remove(struct afs_call *call, |
| 610 | struct sk_buff *skb, bool last) |
| 611 | { |
| 612 | struct afs_vnode *vnode = call->reply; |
| 613 | const __be32 *bp; |
| 614 | |
| 615 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 616 | |
| 617 | afs_transfer_reply(call, skb); |
| 618 | if (!last) |
| 619 | return 0; |
| 620 | |
| 621 | if (call->reply_size != call->reply_max) |
| 622 | return -EBADMSG; |
| 623 | |
| 624 | /* unmarshall the reply once we've received all of it */ |
| 625 | bp = call->buffer; |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 626 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 627 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 628 | |
| 629 | _leave(" = 0 [done]"); |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | /* |
| 634 | * FS.RemoveDir/FS.RemoveFile operation type |
| 635 | */ |
| 636 | static const struct afs_call_type afs_RXFSRemoveXXXX = { |
| 637 | .name = "FS.RemoveXXXX", |
| 638 | .deliver = afs_deliver_fs_remove, |
| 639 | .abort_to_error = afs_abort_to_error, |
| 640 | .destructor = afs_flat_call_destructor, |
| 641 | }; |
| 642 | |
| 643 | /* |
| 644 | * remove a file or directory |
| 645 | */ |
| 646 | int afs_fs_remove(struct afs_server *server, |
| 647 | struct key *key, |
| 648 | struct afs_vnode *vnode, |
| 649 | const char *name, |
| 650 | bool isdir, |
| 651 | const struct afs_wait_mode *wait_mode) |
| 652 | { |
| 653 | struct afs_call *call; |
| 654 | size_t namesz, reqsz, padsz; |
| 655 | __be32 *bp; |
| 656 | |
| 657 | _enter(""); |
| 658 | |
| 659 | namesz = strlen(name); |
| 660 | padsz = (4 - (namesz & 3)) & 3; |
| 661 | reqsz = (5 * 4) + namesz + padsz; |
| 662 | |
| 663 | call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4); |
| 664 | if (!call) |
| 665 | return -ENOMEM; |
| 666 | |
| 667 | call->key = key; |
| 668 | call->reply = vnode; |
| 669 | call->service_id = FS_SERVICE; |
| 670 | call->port = htons(AFS_FS_PORT); |
| 671 | |
| 672 | /* marshall the parameters */ |
| 673 | bp = call->request; |
| 674 | *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE); |
| 675 | *bp++ = htonl(vnode->fid.vid); |
| 676 | *bp++ = htonl(vnode->fid.vnode); |
| 677 | *bp++ = htonl(vnode->fid.unique); |
| 678 | *bp++ = htonl(namesz); |
| 679 | memcpy(bp, name, namesz); |
| 680 | bp = (void *) bp + namesz; |
| 681 | if (padsz > 0) { |
| 682 | memset(bp, 0, padsz); |
| 683 | bp = (void *) bp + padsz; |
| 684 | } |
| 685 | |
| 686 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 687 | } |
| 688 | |
| 689 | /* |
| 690 | * deliver reply data to an FS.Link |
| 691 | */ |
| 692 | static int afs_deliver_fs_link(struct afs_call *call, |
| 693 | struct sk_buff *skb, bool last) |
| 694 | { |
| 695 | struct afs_vnode *dvnode = call->reply, *vnode = call->reply2; |
| 696 | const __be32 *bp; |
| 697 | |
| 698 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 699 | |
| 700 | afs_transfer_reply(call, skb); |
| 701 | if (!last) |
| 702 | return 0; |
| 703 | |
| 704 | if (call->reply_size != call->reply_max) |
| 705 | return -EBADMSG; |
| 706 | |
| 707 | /* unmarshall the reply once we've received all of it */ |
| 708 | bp = call->buffer; |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 709 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
| 710 | xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 711 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 712 | |
| 713 | _leave(" = 0 [done]"); |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * FS.Link operation type |
| 719 | */ |
| 720 | static const struct afs_call_type afs_RXFSLink = { |
| 721 | .name = "FS.Link", |
| 722 | .deliver = afs_deliver_fs_link, |
| 723 | .abort_to_error = afs_abort_to_error, |
| 724 | .destructor = afs_flat_call_destructor, |
| 725 | }; |
| 726 | |
| 727 | /* |
| 728 | * make a hard link |
| 729 | */ |
| 730 | int afs_fs_link(struct afs_server *server, |
| 731 | struct key *key, |
| 732 | struct afs_vnode *dvnode, |
| 733 | struct afs_vnode *vnode, |
| 734 | const char *name, |
| 735 | const struct afs_wait_mode *wait_mode) |
| 736 | { |
| 737 | struct afs_call *call; |
| 738 | size_t namesz, reqsz, padsz; |
| 739 | __be32 *bp; |
| 740 | |
| 741 | _enter(""); |
| 742 | |
| 743 | namesz = strlen(name); |
| 744 | padsz = (4 - (namesz & 3)) & 3; |
| 745 | reqsz = (5 * 4) + namesz + padsz + (3 * 4); |
| 746 | |
| 747 | call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4); |
| 748 | if (!call) |
| 749 | return -ENOMEM; |
| 750 | |
| 751 | call->key = key; |
| 752 | call->reply = dvnode; |
| 753 | call->reply2 = vnode; |
| 754 | call->service_id = FS_SERVICE; |
| 755 | call->port = htons(AFS_FS_PORT); |
| 756 | |
| 757 | /* marshall the parameters */ |
| 758 | bp = call->request; |
| 759 | *bp++ = htonl(FSLINK); |
| 760 | *bp++ = htonl(dvnode->fid.vid); |
| 761 | *bp++ = htonl(dvnode->fid.vnode); |
| 762 | *bp++ = htonl(dvnode->fid.unique); |
| 763 | *bp++ = htonl(namesz); |
| 764 | memcpy(bp, name, namesz); |
| 765 | bp = (void *) bp + namesz; |
| 766 | if (padsz > 0) { |
| 767 | memset(bp, 0, padsz); |
| 768 | bp = (void *) bp + padsz; |
| 769 | } |
| 770 | *bp++ = htonl(vnode->fid.vid); |
| 771 | *bp++ = htonl(vnode->fid.vnode); |
| 772 | *bp++ = htonl(vnode->fid.unique); |
| 773 | |
| 774 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * deliver reply data to an FS.Symlink |
| 779 | */ |
| 780 | static int afs_deliver_fs_symlink(struct afs_call *call, |
| 781 | struct sk_buff *skb, bool last) |
| 782 | { |
| 783 | struct afs_vnode *vnode = call->reply; |
| 784 | const __be32 *bp; |
| 785 | |
| 786 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 787 | |
| 788 | afs_transfer_reply(call, skb); |
| 789 | if (!last) |
| 790 | return 0; |
| 791 | |
| 792 | if (call->reply_size != call->reply_max) |
| 793 | return -EBADMSG; |
| 794 | |
| 795 | /* unmarshall the reply once we've received all of it */ |
| 796 | bp = call->buffer; |
| 797 | xdr_decode_AFSFid(&bp, call->reply2); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 798 | xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL); |
| 799 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 800 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 801 | |
| 802 | _leave(" = 0 [done]"); |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | /* |
| 807 | * FS.Symlink operation type |
| 808 | */ |
| 809 | static const struct afs_call_type afs_RXFSSymlink = { |
| 810 | .name = "FS.Symlink", |
| 811 | .deliver = afs_deliver_fs_symlink, |
| 812 | .abort_to_error = afs_abort_to_error, |
| 813 | .destructor = afs_flat_call_destructor, |
| 814 | }; |
| 815 | |
| 816 | /* |
| 817 | * create a symbolic link |
| 818 | */ |
| 819 | int afs_fs_symlink(struct afs_server *server, |
| 820 | struct key *key, |
| 821 | struct afs_vnode *vnode, |
| 822 | const char *name, |
| 823 | const char *contents, |
| 824 | struct afs_fid *newfid, |
| 825 | struct afs_file_status *newstatus, |
| 826 | const struct afs_wait_mode *wait_mode) |
| 827 | { |
| 828 | struct afs_call *call; |
| 829 | size_t namesz, reqsz, padsz, c_namesz, c_padsz; |
| 830 | __be32 *bp; |
| 831 | |
| 832 | _enter(""); |
| 833 | |
| 834 | namesz = strlen(name); |
| 835 | padsz = (4 - (namesz & 3)) & 3; |
| 836 | |
| 837 | c_namesz = strlen(contents); |
| 838 | c_padsz = (4 - (c_namesz & 3)) & 3; |
| 839 | |
| 840 | reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4); |
| 841 | |
| 842 | call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz, |
| 843 | (3 + 21 + 21 + 6) * 4); |
| 844 | if (!call) |
| 845 | return -ENOMEM; |
| 846 | |
| 847 | call->key = key; |
| 848 | call->reply = vnode; |
| 849 | call->reply2 = newfid; |
| 850 | call->reply3 = newstatus; |
| 851 | call->service_id = FS_SERVICE; |
| 852 | call->port = htons(AFS_FS_PORT); |
| 853 | |
| 854 | /* marshall the parameters */ |
| 855 | bp = call->request; |
| 856 | *bp++ = htonl(FSSYMLINK); |
| 857 | *bp++ = htonl(vnode->fid.vid); |
| 858 | *bp++ = htonl(vnode->fid.vnode); |
| 859 | *bp++ = htonl(vnode->fid.unique); |
| 860 | *bp++ = htonl(namesz); |
| 861 | memcpy(bp, name, namesz); |
| 862 | bp = (void *) bp + namesz; |
| 863 | if (padsz > 0) { |
| 864 | memset(bp, 0, padsz); |
| 865 | bp = (void *) bp + padsz; |
| 866 | } |
| 867 | *bp++ = htonl(c_namesz); |
| 868 | memcpy(bp, contents, c_namesz); |
| 869 | bp = (void *) bp + c_namesz; |
| 870 | if (c_padsz > 0) { |
| 871 | memset(bp, 0, c_padsz); |
| 872 | bp = (void *) bp + c_padsz; |
| 873 | } |
| 874 | *bp++ = htonl(AFS_SET_MODE); |
| 875 | *bp++ = 0; /* mtime */ |
| 876 | *bp++ = 0; /* owner */ |
| 877 | *bp++ = 0; /* group */ |
| 878 | *bp++ = htonl(S_IRWXUGO); /* unix mode */ |
| 879 | *bp++ = 0; /* segment size */ |
| 880 | |
| 881 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 882 | } |
| 883 | |
| 884 | /* |
| 885 | * deliver reply data to an FS.Rename |
| 886 | */ |
| 887 | static int afs_deliver_fs_rename(struct afs_call *call, |
| 888 | struct sk_buff *skb, bool last) |
| 889 | { |
| 890 | struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2; |
| 891 | const __be32 *bp; |
| 892 | |
| 893 | _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); |
| 894 | |
| 895 | afs_transfer_reply(call, skb); |
| 896 | if (!last) |
| 897 | return 0; |
| 898 | |
| 899 | if (call->reply_size != call->reply_max) |
| 900 | return -EBADMSG; |
| 901 | |
| 902 | /* unmarshall the reply once we've received all of it */ |
| 903 | bp = call->buffer; |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 904 | xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 905 | if (new_dvnode != orig_dvnode) |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 906 | xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode, |
| 907 | NULL); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 908 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 909 | |
| 910 | _leave(" = 0 [done]"); |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | /* |
| 915 | * FS.Rename operation type |
| 916 | */ |
| 917 | static const struct afs_call_type afs_RXFSRename = { |
| 918 | .name = "FS.Rename", |
| 919 | .deliver = afs_deliver_fs_rename, |
| 920 | .abort_to_error = afs_abort_to_error, |
| 921 | .destructor = afs_flat_call_destructor, |
| 922 | }; |
| 923 | |
| 924 | /* |
| 925 | * create a symbolic link |
| 926 | */ |
| 927 | int afs_fs_rename(struct afs_server *server, |
| 928 | struct key *key, |
| 929 | struct afs_vnode *orig_dvnode, |
| 930 | const char *orig_name, |
| 931 | struct afs_vnode *new_dvnode, |
| 932 | const char *new_name, |
| 933 | const struct afs_wait_mode *wait_mode) |
| 934 | { |
| 935 | struct afs_call *call; |
| 936 | size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz; |
| 937 | __be32 *bp; |
| 938 | |
| 939 | _enter(""); |
| 940 | |
| 941 | o_namesz = strlen(orig_name); |
| 942 | o_padsz = (4 - (o_namesz & 3)) & 3; |
| 943 | |
| 944 | n_namesz = strlen(new_name); |
| 945 | n_padsz = (4 - (n_namesz & 3)) & 3; |
| 946 | |
| 947 | reqsz = (4 * 4) + |
| 948 | 4 + o_namesz + o_padsz + |
| 949 | (3 * 4) + |
| 950 | 4 + n_namesz + n_padsz; |
| 951 | |
| 952 | call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4); |
| 953 | if (!call) |
| 954 | return -ENOMEM; |
| 955 | |
| 956 | call->key = key; |
| 957 | call->reply = orig_dvnode; |
| 958 | call->reply2 = new_dvnode; |
| 959 | call->service_id = FS_SERVICE; |
| 960 | call->port = htons(AFS_FS_PORT); |
| 961 | |
| 962 | /* marshall the parameters */ |
| 963 | bp = call->request; |
| 964 | *bp++ = htonl(FSRENAME); |
| 965 | *bp++ = htonl(orig_dvnode->fid.vid); |
| 966 | *bp++ = htonl(orig_dvnode->fid.vnode); |
| 967 | *bp++ = htonl(orig_dvnode->fid.unique); |
| 968 | *bp++ = htonl(o_namesz); |
| 969 | memcpy(bp, orig_name, o_namesz); |
| 970 | bp = (void *) bp + o_namesz; |
| 971 | if (o_padsz > 0) { |
| 972 | memset(bp, 0, o_padsz); |
| 973 | bp = (void *) bp + o_padsz; |
| 974 | } |
| 975 | |
| 976 | *bp++ = htonl(new_dvnode->fid.vid); |
| 977 | *bp++ = htonl(new_dvnode->fid.vnode); |
| 978 | *bp++ = htonl(new_dvnode->fid.unique); |
| 979 | *bp++ = htonl(n_namesz); |
| 980 | memcpy(bp, new_name, n_namesz); |
| 981 | bp = (void *) bp + n_namesz; |
| 982 | if (n_padsz > 0) { |
| 983 | memset(bp, 0, n_padsz); |
| 984 | bp = (void *) bp + n_padsz; |
| 985 | } |
| 986 | |
| 987 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 988 | } |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 989 | |
| 990 | /* |
| 991 | * deliver reply data to an FS.StoreData |
| 992 | */ |
| 993 | static int afs_deliver_fs_store_data(struct afs_call *call, |
| 994 | struct sk_buff *skb, bool last) |
| 995 | { |
| 996 | struct afs_vnode *vnode = call->reply; |
| 997 | const __be32 *bp; |
| 998 | |
| 999 | _enter(",,%u", last); |
| 1000 | |
| 1001 | afs_transfer_reply(call, skb); |
| 1002 | if (!last) { |
| 1003 | _leave(" = 0 [more]"); |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
| 1007 | if (call->reply_size != call->reply_max) { |
| 1008 | _leave(" = -EBADMSG [%u != %u]", |
| 1009 | call->reply_size, call->reply_max); |
| 1010 | return -EBADMSG; |
| 1011 | } |
| 1012 | |
| 1013 | /* unmarshall the reply once we've received all of it */ |
| 1014 | bp = call->buffer; |
| 1015 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, |
| 1016 | &call->store_version); |
| 1017 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 1018 | |
| 1019 | afs_pages_written_back(vnode, call); |
| 1020 | |
| 1021 | _leave(" = 0 [done]"); |
| 1022 | return 0; |
| 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * FS.StoreData operation type |
| 1027 | */ |
| 1028 | static const struct afs_call_type afs_RXFSStoreData = { |
| 1029 | .name = "FS.StoreData", |
| 1030 | .deliver = afs_deliver_fs_store_data, |
| 1031 | .abort_to_error = afs_abort_to_error, |
| 1032 | .destructor = afs_flat_call_destructor, |
| 1033 | }; |
| 1034 | |
| 1035 | /* |
| 1036 | * store a set of pages |
| 1037 | */ |
| 1038 | int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb, |
| 1039 | pgoff_t first, pgoff_t last, |
| 1040 | unsigned offset, unsigned to, |
| 1041 | const struct afs_wait_mode *wait_mode) |
| 1042 | { |
| 1043 | struct afs_vnode *vnode = wb->vnode; |
| 1044 | struct afs_call *call; |
| 1045 | loff_t size, pos, i_size; |
| 1046 | __be32 *bp; |
| 1047 | |
| 1048 | _enter(",%x,{%x:%u},,", |
| 1049 | key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode); |
| 1050 | |
| 1051 | size = to - offset; |
| 1052 | if (first != last) |
| 1053 | size += (loff_t)(last - first) << PAGE_SHIFT; |
| 1054 | pos = (loff_t)first << PAGE_SHIFT; |
| 1055 | pos += offset; |
| 1056 | |
| 1057 | i_size = i_size_read(&vnode->vfs_inode); |
| 1058 | if (pos + size > i_size) |
| 1059 | i_size = size + pos; |
| 1060 | |
| 1061 | _debug("size %llx, at %llx, i_size %llx", |
| 1062 | (unsigned long long) size, (unsigned long long) pos, |
| 1063 | (unsigned long long) i_size); |
| 1064 | |
| 1065 | BUG_ON(i_size > 0xffffffff); // TODO: use 64-bit store |
| 1066 | |
| 1067 | call = afs_alloc_flat_call(&afs_RXFSStoreData, |
| 1068 | (4 + 6 + 3) * 4, |
| 1069 | (21 + 6) * 4); |
| 1070 | if (!call) |
| 1071 | return -ENOMEM; |
| 1072 | |
| 1073 | call->wb = wb; |
| 1074 | call->key = wb->key; |
| 1075 | call->reply = vnode; |
| 1076 | call->service_id = FS_SERVICE; |
| 1077 | call->port = htons(AFS_FS_PORT); |
| 1078 | call->mapping = vnode->vfs_inode.i_mapping; |
| 1079 | call->first = first; |
| 1080 | call->last = last; |
| 1081 | call->first_offset = offset; |
| 1082 | call->last_to = to; |
| 1083 | call->send_pages = true; |
| 1084 | call->store_version = vnode->status.data_version + 1; |
| 1085 | |
| 1086 | /* marshall the parameters */ |
| 1087 | bp = call->request; |
| 1088 | *bp++ = htonl(FSSTOREDATA); |
| 1089 | *bp++ = htonl(vnode->fid.vid); |
| 1090 | *bp++ = htonl(vnode->fid.vnode); |
| 1091 | *bp++ = htonl(vnode->fid.unique); |
| 1092 | |
| 1093 | *bp++ = 0; /* mask */ |
| 1094 | *bp++ = 0; /* mtime */ |
| 1095 | *bp++ = 0; /* owner */ |
| 1096 | *bp++ = 0; /* group */ |
| 1097 | *bp++ = 0; /* unix mode */ |
| 1098 | *bp++ = 0; /* segment size */ |
| 1099 | |
| 1100 | *bp++ = htonl(pos); |
| 1101 | *bp++ = htonl(size); |
| 1102 | *bp++ = htonl(i_size); |
| 1103 | |
| 1104 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * deliver reply data to an FS.StoreStatus |
| 1109 | */ |
| 1110 | static int afs_deliver_fs_store_status(struct afs_call *call, |
| 1111 | struct sk_buff *skb, bool last) |
| 1112 | { |
| 1113 | afs_dataversion_t *store_version; |
| 1114 | struct afs_vnode *vnode = call->reply; |
| 1115 | const __be32 *bp; |
| 1116 | |
| 1117 | _enter(",,%u", last); |
| 1118 | |
| 1119 | afs_transfer_reply(call, skb); |
| 1120 | if (!last) { |
| 1121 | _leave(" = 0 [more]"); |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
| 1125 | if (call->reply_size != call->reply_max) { |
| 1126 | _leave(" = -EBADMSG [%u != %u]", |
| 1127 | call->reply_size, call->reply_max); |
| 1128 | return -EBADMSG; |
| 1129 | } |
| 1130 | |
| 1131 | /* unmarshall the reply once we've received all of it */ |
| 1132 | store_version = NULL; |
| 1133 | if (call->operation_ID == FSSTOREDATA) |
| 1134 | store_version = &call->store_version; |
| 1135 | |
| 1136 | bp = call->buffer; |
| 1137 | xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version); |
| 1138 | /* xdr_decode_AFSVolSync(&bp, call->replyX); */ |
| 1139 | |
| 1140 | _leave(" = 0 [done]"); |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * FS.StoreStatus operation type |
| 1146 | */ |
| 1147 | static const struct afs_call_type afs_RXFSStoreStatus = { |
| 1148 | .name = "FS.StoreStatus", |
| 1149 | .deliver = afs_deliver_fs_store_status, |
| 1150 | .abort_to_error = afs_abort_to_error, |
| 1151 | .destructor = afs_flat_call_destructor, |
| 1152 | }; |
| 1153 | |
| 1154 | static const struct afs_call_type afs_RXFSStoreData_as_Status = { |
| 1155 | .name = "FS.StoreData", |
| 1156 | .deliver = afs_deliver_fs_store_status, |
| 1157 | .abort_to_error = afs_abort_to_error, |
| 1158 | .destructor = afs_flat_call_destructor, |
| 1159 | }; |
| 1160 | |
| 1161 | /* |
| 1162 | * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus |
| 1163 | * so as to alter the file size also |
| 1164 | */ |
| 1165 | static int afs_fs_setattr_size(struct afs_server *server, struct key *key, |
| 1166 | struct afs_vnode *vnode, struct iattr *attr, |
| 1167 | const struct afs_wait_mode *wait_mode) |
| 1168 | { |
| 1169 | struct afs_call *call; |
| 1170 | __be32 *bp; |
| 1171 | |
| 1172 | _enter(",%x,{%x:%u},,", |
| 1173 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); |
| 1174 | |
| 1175 | ASSERT(attr->ia_valid & ATTR_SIZE); |
| 1176 | ASSERTCMP(attr->ia_size, <=, 0xffffffff); // TODO: use 64-bit store |
| 1177 | |
| 1178 | call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status, |
| 1179 | (4 + 6 + 3) * 4, |
| 1180 | (21 + 6) * 4); |
| 1181 | if (!call) |
| 1182 | return -ENOMEM; |
| 1183 | |
| 1184 | call->key = key; |
| 1185 | call->reply = vnode; |
| 1186 | call->service_id = FS_SERVICE; |
| 1187 | call->port = htons(AFS_FS_PORT); |
| 1188 | call->store_version = vnode->status.data_version + 1; |
| 1189 | call->operation_ID = FSSTOREDATA; |
| 1190 | |
| 1191 | /* marshall the parameters */ |
| 1192 | bp = call->request; |
| 1193 | *bp++ = htonl(FSSTOREDATA); |
| 1194 | *bp++ = htonl(vnode->fid.vid); |
| 1195 | *bp++ = htonl(vnode->fid.vnode); |
| 1196 | *bp++ = htonl(vnode->fid.unique); |
| 1197 | |
| 1198 | xdr_encode_AFS_StoreStatus(&bp, attr); |
| 1199 | |
| 1200 | *bp++ = 0; /* position of start of write */ |
| 1201 | *bp++ = 0; /* size of write */ |
| 1202 | *bp++ = htonl(attr->ia_size); /* new file length */ |
| 1203 | |
| 1204 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * set the attributes on a file, using FS.StoreData if there's a change in file |
| 1209 | * size, and FS.StoreStatus otherwise |
| 1210 | */ |
| 1211 | int afs_fs_setattr(struct afs_server *server, struct key *key, |
| 1212 | struct afs_vnode *vnode, struct iattr *attr, |
| 1213 | const struct afs_wait_mode *wait_mode) |
| 1214 | { |
| 1215 | struct afs_call *call; |
| 1216 | __be32 *bp; |
| 1217 | |
| 1218 | if (attr->ia_valid & ATTR_SIZE) |
| 1219 | return afs_fs_setattr_size(server, key, vnode, attr, |
| 1220 | wait_mode); |
| 1221 | |
| 1222 | _enter(",%x,{%x:%u},,", |
| 1223 | key_serial(key), vnode->fid.vid, vnode->fid.vnode); |
| 1224 | |
| 1225 | call = afs_alloc_flat_call(&afs_RXFSStoreStatus, |
| 1226 | (4 + 6) * 4, |
| 1227 | (21 + 6) * 4); |
| 1228 | if (!call) |
| 1229 | return -ENOMEM; |
| 1230 | |
| 1231 | call->key = key; |
| 1232 | call->reply = vnode; |
| 1233 | call->service_id = FS_SERVICE; |
| 1234 | call->port = htons(AFS_FS_PORT); |
| 1235 | call->operation_ID = FSSTORESTATUS; |
| 1236 | |
| 1237 | /* marshall the parameters */ |
| 1238 | bp = call->request; |
| 1239 | *bp++ = htonl(FSSTORESTATUS); |
| 1240 | *bp++ = htonl(vnode->fid.vid); |
| 1241 | *bp++ = htonl(vnode->fid.vnode); |
| 1242 | *bp++ = htonl(vnode->fid.unique); |
| 1243 | |
| 1244 | xdr_encode_AFS_StoreStatus(&bp, attr); |
| 1245 | |
| 1246 | return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); |
| 1247 | } |