Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1 | /* |
| 2 | * net/9p/clnt.c |
| 3 | * |
| 4 | * 9P Client |
| 5 | * |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 6 | * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 7 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to: |
| 20 | * Free Software Foundation |
| 21 | * 51 Franklin Street, Fifth Floor |
| 22 | * Boston, MA 02111-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/fs.h> |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 29 | #include <linux/poll.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 30 | #include <linux/idr.h> |
| 31 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 32 | #include <linux/slab.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 33 | #include <linux/sched.h> |
| 34 | #include <linux/uaccess.h> |
| 35 | #include <net/9p/9p.h> |
Eric Van Hensbergen | fb0466c | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 36 | #include <linux/parser.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 37 | #include <net/9p/client.h> |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 38 | #include <net/9p/transport.h> |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 39 | #include "protocol.h" |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 40 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 41 | /* |
| 42 | * Client Option Parsing (code inspired by NFS code) |
| 43 | * - a little lazy - parse all client options |
| 44 | */ |
| 45 | |
| 46 | enum { |
| 47 | Opt_msize, |
| 48 | Opt_trans, |
| 49 | Opt_legacy, |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 50 | Opt_version, |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 51 | Opt_err, |
| 52 | }; |
| 53 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 54 | static const match_table_t tokens = { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 55 | {Opt_msize, "msize=%u"}, |
| 56 | {Opt_legacy, "noextend"}, |
| 57 | {Opt_trans, "trans=%s"}, |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 58 | {Opt_version, "version=%s"}, |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 59 | {Opt_err, NULL}, |
| 60 | }; |
| 61 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 62 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
| 63 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 64 | return clnt->proto_version == p9_proto_2000L; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 65 | } |
| 66 | EXPORT_SYMBOL(p9_is_proto_dotl); |
| 67 | |
| 68 | inline int p9_is_proto_dotu(struct p9_client *clnt) |
| 69 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 70 | return clnt->proto_version == p9_proto_2000u; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 71 | } |
| 72 | EXPORT_SYMBOL(p9_is_proto_dotu); |
| 73 | |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 74 | /* Interpret mount option for protocol version */ |
Dan Carpenter | 3dc9fef | 2010-04-05 14:37:28 -0500 | [diff] [blame] | 75 | static int get_protocol_version(const substring_t *name) |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 76 | { |
Dan Carpenter | 3dc9fef | 2010-04-05 14:37:28 -0500 | [diff] [blame] | 77 | int version = -EINVAL; |
| 78 | |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 79 | if (!strncmp("9p2000", name->from, name->to-name->from)) { |
| 80 | version = p9_proto_legacy; |
| 81 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
| 82 | } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { |
| 83 | version = p9_proto_2000u; |
| 84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 85 | } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { |
| 86 | version = p9_proto_2000L; |
| 87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 88 | } else { |
| 89 | P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", |
| 90 | name->from); |
| 91 | } |
| 92 | return version; |
| 93 | } |
| 94 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 95 | static struct p9_req_t * |
| 96 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 97 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 98 | /** |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 99 | * parse_options - parse mount options into client structure |
| 100 | * @opts: options string passed from mount |
| 101 | * @clnt: existing v9fs client information |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 102 | * |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 103 | * Return 0 upon success, -ERRNO upon failure |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 104 | */ |
| 105 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 106 | static int parse_opts(char *opts, struct p9_client *clnt) |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 107 | { |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 108 | char *options, *tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 109 | char *p; |
| 110 | substring_t args[MAX_OPT_ARGS]; |
| 111 | int option; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 112 | int ret = 0; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 113 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 114 | clnt->proto_version = p9_proto_2000u; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 115 | clnt->msize = 8192; |
| 116 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 117 | if (!opts) |
| 118 | return 0; |
| 119 | |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 120 | tmp_options = kstrdup(opts, GFP_KERNEL); |
| 121 | if (!tmp_options) { |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 122 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 123 | "failed to allocate copy of option string\n"); |
| 124 | return -ENOMEM; |
| 125 | } |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 126 | options = tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 127 | |
| 128 | while ((p = strsep(&options, ",")) != NULL) { |
| 129 | int token; |
| 130 | if (!*p) |
| 131 | continue; |
| 132 | token = match_token(p, tokens, args); |
| 133 | if (token < Opt_trans) { |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 134 | int r = match_int(&args[0], &option); |
| 135 | if (r < 0) { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 136 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 137 | "integer field, but no integer?\n"); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 138 | ret = r; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 139 | continue; |
| 140 | } |
| 141 | } |
| 142 | switch (token) { |
| 143 | case Opt_msize: |
| 144 | clnt->msize = option; |
| 145 | break; |
| 146 | case Opt_trans: |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 147 | clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
Eric Van Hensbergen | 349d3bb8 | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 148 | if(clnt->trans_mod == NULL) { |
| 149 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 150 | "Could not find request transport: %s\n", |
| 151 | (char *) &args[0]); |
| 152 | ret = -EINVAL; |
| 153 | goto free_and_return; |
| 154 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 155 | break; |
| 156 | case Opt_legacy: |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 157 | clnt->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 158 | break; |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 159 | case Opt_version: |
| 160 | ret = get_protocol_version(&args[0]); |
| 161 | if (ret == -EINVAL) |
| 162 | goto free_and_return; |
| 163 | clnt->proto_version = ret; |
| 164 | break; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 165 | default: |
| 166 | continue; |
| 167 | } |
| 168 | } |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 169 | |
Eric Van Hensbergen | 349d3bb8 | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 170 | free_and_return: |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 171 | kfree(tmp_options); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 172 | return ret; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 173 | } |
| 174 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 175 | /** |
| 176 | * p9_tag_alloc - lookup/allocate a request by tag |
| 177 | * @c: client session to lookup tag within |
| 178 | * @tag: numeric id for transaction |
| 179 | * |
| 180 | * this is a simple array lookup, but will grow the |
| 181 | * request_slots as necessary to accomodate transaction |
| 182 | * ids which did not previously have a slot. |
| 183 | * |
| 184 | * this code relies on the client spinlock to manage locks, its |
| 185 | * possible we should switch to something else, but I'd rather |
| 186 | * stick with something low-overhead for the common case. |
| 187 | * |
| 188 | */ |
| 189 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 190 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 191 | { |
| 192 | unsigned long flags; |
| 193 | int row, col; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 194 | struct p9_req_t *req; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 195 | |
| 196 | /* This looks up the original request by tag so we know which |
| 197 | * buffer to read the data into */ |
| 198 | tag++; |
| 199 | |
| 200 | if (tag >= c->max_tag) { |
| 201 | spin_lock_irqsave(&c->lock, flags); |
| 202 | /* check again since original check was outside of lock */ |
| 203 | while (tag >= c->max_tag) { |
| 204 | row = (tag / P9_ROW_MAXTAG); |
| 205 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, |
| 206 | sizeof(struct p9_req_t), GFP_ATOMIC); |
| 207 | |
| 208 | if (!c->reqs[row]) { |
| 209 | printk(KERN_ERR "Couldn't grow tag array\n"); |
Eric Van Hensbergen | e45c540 | 2008-10-22 18:54:47 -0500 | [diff] [blame] | 210 | spin_unlock_irqrestore(&c->lock, flags); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 211 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 212 | } |
| 213 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 214 | c->reqs[row][col].status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 215 | c->reqs[row][col].tc = NULL; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 216 | } |
| 217 | c->max_tag += P9_ROW_MAXTAG; |
| 218 | } |
| 219 | spin_unlock_irqrestore(&c->lock, flags); |
| 220 | } |
| 221 | row = tag / P9_ROW_MAXTAG; |
| 222 | col = tag % P9_ROW_MAXTAG; |
| 223 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 224 | req = &c->reqs[row][col]; |
| 225 | if (!req->tc) { |
| 226 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); |
| 227 | if (!req->wq) { |
| 228 | printk(KERN_ERR "Couldn't grow tag array\n"); |
| 229 | return ERR_PTR(-ENOMEM); |
| 230 | } |
| 231 | init_waitqueue_head(req->wq); |
Venkateswararao Jujjuri (JV) | f735195 | 2011-02-16 12:54:22 -0800 | [diff] [blame^] | 232 | if ((c->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) == |
| 233 | P9_TRANS_PREF_PAYLOAD_SEP) { |
| 234 | int alloc_msize = min(c->msize, 4096); |
| 235 | req->tc = kmalloc(sizeof(struct p9_fcall)+alloc_msize, |
| 236 | GFP_KERNEL); |
| 237 | req->tc->capacity = alloc_msize; |
| 238 | req->rc = kmalloc(sizeof(struct p9_fcall)+alloc_msize, |
| 239 | GFP_KERNEL); |
| 240 | req->rc->capacity = alloc_msize; |
| 241 | } else { |
| 242 | req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, |
| 243 | GFP_KERNEL); |
| 244 | req->tc->capacity = c->msize; |
| 245 | req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, |
| 246 | GFP_KERNEL); |
| 247 | req->rc->capacity = c->msize; |
| 248 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 249 | if ((!req->tc) || (!req->rc)) { |
| 250 | printk(KERN_ERR "Couldn't grow tag array\n"); |
| 251 | kfree(req->tc); |
| 252 | kfree(req->rc); |
Tom Tucker | 45abdf1 | 2008-10-23 16:33:25 -0500 | [diff] [blame] | 253 | kfree(req->wq); |
| 254 | req->tc = req->rc = NULL; |
| 255 | req->wq = NULL; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 256 | return ERR_PTR(-ENOMEM); |
| 257 | } |
| 258 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 259 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | p9pdu_reset(req->tc); |
| 263 | p9pdu_reset(req->rc); |
| 264 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 265 | req->tc->tag = tag-1; |
| 266 | req->status = REQ_STATUS_ALLOC; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 267 | |
| 268 | return &c->reqs[row][col]; |
| 269 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 270 | |
| 271 | /** |
| 272 | * p9_tag_lookup - lookup a request by tag |
| 273 | * @c: client session to lookup tag within |
| 274 | * @tag: numeric id for transaction |
| 275 | * |
| 276 | */ |
| 277 | |
| 278 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) |
| 279 | { |
| 280 | int row, col; |
| 281 | |
| 282 | /* This looks up the original request by tag so we know which |
| 283 | * buffer to read the data into */ |
| 284 | tag++; |
| 285 | |
| 286 | BUG_ON(tag >= c->max_tag); |
| 287 | |
| 288 | row = tag / P9_ROW_MAXTAG; |
| 289 | col = tag % P9_ROW_MAXTAG; |
| 290 | |
| 291 | return &c->reqs[row][col]; |
| 292 | } |
| 293 | EXPORT_SYMBOL(p9_tag_lookup); |
| 294 | |
| 295 | /** |
| 296 | * p9_tag_init - setup tags structure and contents |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 297 | * @c: v9fs client struct |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 298 | * |
| 299 | * This initializes the tags structure for each client instance. |
| 300 | * |
| 301 | */ |
| 302 | |
| 303 | static int p9_tag_init(struct p9_client *c) |
| 304 | { |
| 305 | int err = 0; |
| 306 | |
| 307 | c->tagpool = p9_idpool_create(); |
| 308 | if (IS_ERR(c->tagpool)) { |
| 309 | err = PTR_ERR(c->tagpool); |
| 310 | c->tagpool = NULL; |
| 311 | goto error; |
| 312 | } |
| 313 | |
| 314 | p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
| 315 | |
| 316 | c->max_tag = 0; |
| 317 | error: |
| 318 | return err; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * p9_tag_cleanup - cleans up tags structure and reclaims resources |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 323 | * @c: v9fs client struct |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 324 | * |
| 325 | * This frees resources associated with the tags structure |
| 326 | * |
| 327 | */ |
| 328 | static void p9_tag_cleanup(struct p9_client *c) |
| 329 | { |
| 330 | int row, col; |
| 331 | |
| 332 | /* check to insure all requests are idle */ |
| 333 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
| 334 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 335 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { |
| 336 | P9_DPRINTK(P9_DEBUG_MUX, |
| 337 | "Attempting to cleanup non-free tag %d,%d\n", |
| 338 | row, col); |
| 339 | /* TODO: delay execution of cleanup */ |
| 340 | return; |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 345 | if (c->tagpool) { |
| 346 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 347 | p9_idpool_destroy(c->tagpool); |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 348 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 349 | |
| 350 | /* free requests associated with tags */ |
| 351 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 352 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 353 | kfree(c->reqs[row][col].wq); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 354 | kfree(c->reqs[row][col].tc); |
| 355 | kfree(c->reqs[row][col].rc); |
| 356 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 357 | kfree(c->reqs[row]); |
| 358 | } |
| 359 | c->max_tag = 0; |
| 360 | } |
| 361 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 362 | /** |
| 363 | * p9_free_req - free a request and clean-up as necessary |
| 364 | * c: client state |
| 365 | * r: request to release |
| 366 | * |
| 367 | */ |
| 368 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 369 | static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 370 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 371 | int tag = r->tc->tag; |
| 372 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
| 373 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 374 | r->status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 375 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
| 376 | p9_idpool_put(tag, c->tagpool); |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 377 | } |
| 378 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 379 | /** |
| 380 | * p9_client_cb - call back from transport to client |
| 381 | * c: client state |
| 382 | * req: request received |
| 383 | * |
| 384 | */ |
| 385 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) |
| 386 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 387 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 388 | wake_up(req->wq); |
| 389 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 390 | } |
| 391 | EXPORT_SYMBOL(p9_client_cb); |
| 392 | |
| 393 | /** |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 394 | * p9_parse_header - parse header arguments out of a packet |
| 395 | * @pdu: packet to parse |
| 396 | * @size: size of packet |
| 397 | * @type: type of request |
| 398 | * @tag: tag of packet |
| 399 | * @rewind: set if we need to rewind offset afterwards |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 400 | */ |
| 401 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 402 | int |
| 403 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, |
| 404 | int rewind) |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 405 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 406 | int8_t r_type; |
| 407 | int16_t r_tag; |
| 408 | int32_t r_size; |
| 409 | int offset = pdu->offset; |
| 410 | int err; |
| 411 | |
| 412 | pdu->offset = 0; |
| 413 | if (pdu->size == 0) |
| 414 | pdu->size = 7; |
| 415 | |
| 416 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); |
| 417 | if (err) |
| 418 | goto rewind_and_exit; |
| 419 | |
| 420 | pdu->size = r_size; |
| 421 | pdu->id = r_type; |
| 422 | pdu->tag = r_tag; |
| 423 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 424 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
| 425 | pdu->id, pdu->tag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 426 | |
| 427 | if (type) |
| 428 | *type = r_type; |
| 429 | if (tag) |
| 430 | *tag = r_tag; |
| 431 | if (size) |
| 432 | *size = r_size; |
| 433 | |
| 434 | |
| 435 | rewind_and_exit: |
| 436 | if (rewind) |
| 437 | pdu->offset = offset; |
| 438 | return err; |
| 439 | } |
| 440 | EXPORT_SYMBOL(p9_parse_header); |
| 441 | |
| 442 | /** |
| 443 | * p9_check_errors - check 9p packet for error return and process it |
| 444 | * @c: current client instance |
| 445 | * @req: request to parse and check for error conditions |
| 446 | * |
| 447 | * returns error code if one is discovered, otherwise returns 0 |
| 448 | * |
| 449 | * this will have to be more complicated if we have multiple |
| 450 | * error packet types |
| 451 | */ |
| 452 | |
| 453 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) |
| 454 | { |
| 455 | int8_t type; |
| 456 | int err; |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 457 | int ecode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 458 | |
| 459 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
| 460 | if (err) { |
| 461 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
| 462 | return err; |
| 463 | } |
| 464 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 465 | if (type != P9_RERROR && type != P9_RLERROR) |
| 466 | return 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 467 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 468 | if (!p9_is_proto_dotl(c)) { |
| 469 | char *ename; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 470 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 471 | if (req->tc->pbuf_size) { |
| 472 | /* Handle user buffers */ |
| 473 | size_t len = req->rc->size - req->rc->offset; |
| 474 | if (req->tc->pubuf) { |
| 475 | /* User Buffer */ |
| 476 | err = copy_from_user( |
| 477 | &req->rc->sdata[req->rc->offset], |
| 478 | req->tc->pubuf, len); |
| 479 | if (err) { |
| 480 | err = -EFAULT; |
| 481 | goto out_err; |
| 482 | } |
| 483 | } else { |
| 484 | /* Kernel Buffer */ |
| 485 | memmove(&req->rc->sdata[req->rc->offset], |
| 486 | req->tc->pkbuf, len); |
Arun R Bharadwaj | 4f7ebe8 | 2010-07-28 14:17:26 +0530 | [diff] [blame] | 487 | } |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 488 | } |
| 489 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
| 490 | &ename, &ecode); |
| 491 | if (err) |
| 492 | goto out_err; |
| 493 | |
| 494 | if (p9_is_proto_dotu(c)) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 495 | err = -ecode; |
| 496 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 497 | if (!err || !IS_ERR_VALUE(err)) { |
| 498 | err = p9_errstr2errno(ename, strlen(ename)); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 499 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 500 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, |
| 501 | ename); |
| 502 | |
| 503 | kfree(ename); |
| 504 | } |
| 505 | } else { |
| 506 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| 507 | err = -ecode; |
| 508 | |
| 509 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
| 510 | } |
| 511 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 512 | |
| 513 | return err; |
Arun R Bharadwaj | 4f7ebe8 | 2010-07-28 14:17:26 +0530 | [diff] [blame] | 514 | |
| 515 | out_err: |
| 516 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
| 517 | |
| 518 | return err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | /** |
| 522 | * p9_client_flush - flush (cancel) a request |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 523 | * @c: client state |
| 524 | * @oldreq: request to cancel |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 525 | * |
| 526 | * This sents a flush for a particular requests and links |
| 527 | * the flush request to the original request. The current |
| 528 | * code only supports a single flush request although the protocol |
| 529 | * allows for multiple flush requests to be sent for a single request. |
| 530 | * |
| 531 | */ |
| 532 | |
| 533 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) |
| 534 | { |
| 535 | struct p9_req_t *req; |
| 536 | int16_t oldtag; |
| 537 | int err; |
| 538 | |
| 539 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); |
| 540 | if (err) |
| 541 | return err; |
| 542 | |
| 543 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
| 544 | |
| 545 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); |
| 546 | if (IS_ERR(req)) |
| 547 | return PTR_ERR(req); |
| 548 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 549 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 550 | /* if we haven't received a response for oldreq, |
| 551 | remove it from the list. */ |
| 552 | spin_lock(&c->lock); |
| 553 | if (oldreq->status == REQ_STATUS_FLSH) |
| 554 | list_del(&oldreq->req_list); |
| 555 | spin_unlock(&c->lock); |
| 556 | |
| 557 | p9_free_req(c, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * p9_client_rpc - issue a request and wait for a response |
| 563 | * @c: client session |
| 564 | * @type: type of request |
| 565 | * @fmt: protocol format string (see protocol.c) |
| 566 | * |
| 567 | * Returns request structure (which client must free using p9_free_req) |
| 568 | */ |
| 569 | |
| 570 | static struct p9_req_t * |
| 571 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) |
| 572 | { |
| 573 | va_list ap; |
| 574 | int tag, err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 575 | struct p9_req_t *req; |
| 576 | unsigned long flags; |
| 577 | int sigpending; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 578 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 579 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 580 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 581 | /* we allow for any status other than disconnected */ |
| 582 | if (c->status == Disconnected) |
| 583 | return ERR_PTR(-EIO); |
| 584 | |
| 585 | /* if status is begin_disconnected we allow only clunk request */ |
| 586 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 587 | return ERR_PTR(-EIO); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 588 | |
| 589 | if (signal_pending(current)) { |
| 590 | sigpending = 1; |
| 591 | clear_thread_flag(TIF_SIGPENDING); |
| 592 | } else |
| 593 | sigpending = 0; |
| 594 | |
| 595 | tag = P9_NOTAG; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 596 | if (type != P9_TVERSION) { |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 597 | tag = p9_idpool_get(c->tagpool); |
| 598 | if (tag < 0) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 599 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | req = p9_tag_alloc(c, tag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 603 | if (IS_ERR(req)) |
| 604 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 605 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 606 | /* marshall the data */ |
| 607 | p9pdu_prepare(req->tc, tag, type); |
| 608 | va_start(ap, fmt); |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 609 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 610 | va_end(ap); |
Aneesh Kumar K.V | 7b3bb3f | 2010-10-19 09:17:02 +0530 | [diff] [blame] | 611 | if (err) |
| 612 | goto reterr; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 613 | p9pdu_finalize(req->tc); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 614 | |
| 615 | err = c->trans_mod->request(c, req); |
| 616 | if (err < 0) { |
Venkateswararao Jujjuri (JV) | 52f44e0 | 2010-09-29 18:33:41 -0700 | [diff] [blame] | 617 | if (err != -ERESTARTSYS) |
| 618 | c->status = Disconnected; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 619 | goto reterr; |
| 620 | } |
| 621 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 622 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 623 | err = wait_event_interruptible(*req->wq, |
| 624 | req->status >= REQ_STATUS_RCVD); |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 625 | P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
| 626 | req->wq, tag, err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 627 | |
| 628 | if (req->status == REQ_STATUS_ERROR) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 629 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 630 | err = req->t_err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 631 | } |
| 632 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 633 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 634 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 635 | sigpending = 1; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 636 | clear_thread_flag(TIF_SIGPENDING); |
| 637 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 638 | if (c->trans_mod->cancel(c, req)) |
| 639 | p9_client_flush(c, req); |
| 640 | |
| 641 | /* if we received the response anyway, don't signal error */ |
| 642 | if (req->status == REQ_STATUS_RCVD) |
| 643 | err = 0; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | if (sigpending) { |
| 647 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 648 | recalc_sigpending(); |
| 649 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 650 | } |
| 651 | |
| 652 | if (err < 0) |
| 653 | goto reterr; |
| 654 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 655 | err = p9_check_errors(c, req); |
| 656 | if (!err) { |
| 657 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); |
| 658 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 659 | } |
| 660 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 661 | reterr: |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 662 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
| 663 | err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 664 | p9_free_req(c, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 665 | return ERR_PTR(err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 666 | } |
| 667 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 668 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
| 669 | { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 670 | int ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 671 | struct p9_fid *fid; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 672 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 673 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 674 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 675 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
| 676 | if (!fid) |
| 677 | return ERR_PTR(-ENOMEM); |
| 678 | |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 679 | ret = p9_idpool_get(clnt->fidpool); |
Roel Kluin | 24e94de | 2009-01-18 21:32:11 -0800 | [diff] [blame] | 680 | if (ret < 0) { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 681 | ret = -ENOSPC; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 682 | goto error; |
| 683 | } |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 684 | fid->fid = ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 685 | |
| 686 | memset(&fid->qid, 0, sizeof(struct p9_qid)); |
| 687 | fid->mode = -1; |
David Howells | f8b9d53 | 2008-11-14 10:38:44 +1100 | [diff] [blame] | 688 | fid->uid = current_fsuid(); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 689 | fid->clnt = clnt; |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 690 | fid->rdir = NULL; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 691 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 692 | list_add(&fid->flist, &clnt->fidlist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 693 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 694 | |
| 695 | return fid; |
| 696 | |
| 697 | error: |
| 698 | kfree(fid); |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 699 | return ERR_PTR(ret); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | static void p9_fid_destroy(struct p9_fid *fid) |
| 703 | { |
| 704 | struct p9_client *clnt; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 705 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 706 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 707 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 708 | clnt = fid->clnt; |
| 709 | p9_idpool_put(fid->fid, clnt->fidpool); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 710 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 711 | list_del(&fid->flist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 712 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 713 | kfree(fid->rdir); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 714 | kfree(fid); |
| 715 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 716 | |
stephen hemminger | 32a875a | 2010-10-19 06:48:16 +0000 | [diff] [blame] | 717 | static int p9_client_version(struct p9_client *c) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 718 | { |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 719 | int err = 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 720 | struct p9_req_t *req; |
| 721 | char *version; |
| 722 | int msize; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 723 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 724 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
| 725 | c->msize, c->proto_version); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 726 | |
| 727 | switch (c->proto_version) { |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 728 | case p9_proto_2000L: |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 729 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 730 | c->msize, "9P2000.L"); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 731 | break; |
| 732 | case p9_proto_2000u: |
| 733 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 734 | c->msize, "9P2000.u"); |
| 735 | break; |
| 736 | case p9_proto_legacy: |
| 737 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 738 | c->msize, "9P2000"); |
| 739 | break; |
| 740 | default: |
| 741 | return -EINVAL; |
| 742 | break; |
| 743 | } |
| 744 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 745 | if (IS_ERR(req)) |
| 746 | return PTR_ERR(req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 747 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 748 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 749 | if (err) { |
| 750 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 751 | p9pdu_dump(1, req->rc); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 752 | goto error; |
| 753 | } |
| 754 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 755 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 756 | if (!strncmp(version, "9P2000.L", 8)) |
| 757 | c->proto_version = p9_proto_2000L; |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 758 | else if (!strncmp(version, "9P2000.u", 8)) |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 759 | c->proto_version = p9_proto_2000u; |
| 760 | else if (!strncmp(version, "9P2000", 6)) |
| 761 | c->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 762 | else { |
| 763 | err = -EREMOTEIO; |
| 764 | goto error; |
| 765 | } |
| 766 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 767 | if (msize < c->msize) |
| 768 | c->msize = msize; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 769 | |
| 770 | error: |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 771 | kfree(version); |
| 772 | p9_free_req(c, req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 773 | |
| 774 | return err; |
| 775 | } |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 776 | |
| 777 | struct p9_client *p9_client_create(const char *dev_name, char *options) |
| 778 | { |
| 779 | int err; |
| 780 | struct p9_client *clnt; |
| 781 | |
| 782 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 783 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
| 784 | if (!clnt) |
| 785 | return ERR_PTR(-ENOMEM); |
| 786 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 787 | clnt->trans_mod = NULL; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 788 | clnt->trans = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 789 | spin_lock_init(&clnt->lock); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 790 | INIT_LIST_HEAD(&clnt->fidlist); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 791 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 792 | p9_tag_init(clnt); |
| 793 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 794 | err = parse_opts(options, clnt); |
| 795 | if (err < 0) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 796 | goto free_client; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 797 | |
Abhishek Kulkarni | a17d172 | 2009-07-14 13:24:10 -0500 | [diff] [blame] | 798 | if (!clnt->trans_mod) |
| 799 | clnt->trans_mod = v9fs_get_default_trans(); |
| 800 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 801 | if (clnt->trans_mod == NULL) { |
| 802 | err = -EPROTONOSUPPORT; |
| 803 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 804 | "No transport defined or default transport\n"); |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 805 | goto free_client; |
| 806 | } |
| 807 | |
| 808 | clnt->fidpool = p9_idpool_create(); |
| 809 | if (IS_ERR(clnt->fidpool)) { |
| 810 | err = PTR_ERR(clnt->fidpool); |
| 811 | clnt->fidpool = NULL; |
| 812 | goto put_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 813 | } |
| 814 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 815 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
| 816 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 817 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 818 | err = clnt->trans_mod->create(clnt, dev_name, options); |
| 819 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 820 | goto destroy_fidpool; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 821 | |
| 822 | if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
| 823 | clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; |
| 824 | |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 825 | err = p9_client_version(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 826 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 827 | goto close_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 828 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 829 | return clnt; |
| 830 | |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 831 | close_trans: |
| 832 | clnt->trans_mod->close(clnt); |
| 833 | destroy_fidpool: |
| 834 | p9_idpool_destroy(clnt->fidpool); |
| 835 | put_trans: |
| 836 | v9fs_put_trans(clnt->trans_mod); |
| 837 | free_client: |
| 838 | kfree(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 839 | return ERR_PTR(err); |
| 840 | } |
| 841 | EXPORT_SYMBOL(p9_client_create); |
| 842 | |
| 843 | void p9_client_destroy(struct p9_client *clnt) |
| 844 | { |
| 845 | struct p9_fid *fid, *fidptr; |
| 846 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 847 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 848 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 849 | if (clnt->trans_mod) |
| 850 | clnt->trans_mod->close(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 851 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 852 | v9fs_put_trans(clnt->trans_mod); |
| 853 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 854 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
| 855 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 856 | p9_fid_destroy(fid); |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 857 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 858 | |
Eric Van Hensbergen | 0af8887 | 2007-07-13 16:47:58 -0500 | [diff] [blame] | 859 | if (clnt->fidpool) |
| 860 | p9_idpool_destroy(clnt->fidpool); |
| 861 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 862 | p9_tag_cleanup(clnt); |
| 863 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 864 | kfree(clnt); |
| 865 | } |
| 866 | EXPORT_SYMBOL(p9_client_destroy); |
| 867 | |
| 868 | void p9_client_disconnect(struct p9_client *clnt) |
| 869 | { |
| 870 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 871 | clnt->status = Disconnected; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 872 | } |
| 873 | EXPORT_SYMBOL(p9_client_disconnect); |
| 874 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 875 | void p9_client_begin_disconnect(struct p9_client *clnt) |
| 876 | { |
| 877 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
| 878 | clnt->status = BeginDisconnect; |
| 879 | } |
| 880 | EXPORT_SYMBOL(p9_client_begin_disconnect); |
| 881 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 882 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 883 | char *uname, u32 n_uname, char *aname) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 884 | { |
| 885 | int err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 886 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 887 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 888 | struct p9_qid qid; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 889 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 890 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
| 891 | afid ? afid->fid : -1, uname, aname); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 892 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 893 | |
| 894 | fid = p9_fid_create(clnt); |
| 895 | if (IS_ERR(fid)) { |
| 896 | err = PTR_ERR(fid); |
| 897 | fid = NULL; |
| 898 | goto error; |
| 899 | } |
| 900 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 901 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
| 902 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
| 903 | if (IS_ERR(req)) { |
| 904 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 905 | goto error; |
| 906 | } |
| 907 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 908 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 909 | if (err) { |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 910 | p9pdu_dump(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 911 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 912 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 913 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 914 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 915 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 916 | qid.type, |
| 917 | (unsigned long long)qid.path, |
| 918 | qid.version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 919 | |
| 920 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); |
| 921 | |
| 922 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 923 | return fid; |
| 924 | |
| 925 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 926 | if (fid) |
| 927 | p9_fid_destroy(fid); |
| 928 | return ERR_PTR(err); |
| 929 | } |
| 930 | EXPORT_SYMBOL(p9_client_attach); |
| 931 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 932 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, |
| 933 | int clone) |
| 934 | { |
| 935 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 936 | struct p9_client *clnt; |
| 937 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 938 | struct p9_qid *wqids; |
| 939 | struct p9_req_t *req; |
| 940 | int16_t nwqids, count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 941 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 942 | err = 0; |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 943 | wqids = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 944 | clnt = oldfid->clnt; |
| 945 | if (clone) { |
| 946 | fid = p9_fid_create(clnt); |
| 947 | if (IS_ERR(fid)) { |
| 948 | err = PTR_ERR(fid); |
| 949 | fid = NULL; |
| 950 | goto error; |
| 951 | } |
| 952 | |
| 953 | fid->uid = oldfid->uid; |
| 954 | } else |
| 955 | fid = oldfid; |
| 956 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 957 | |
| 958 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", |
| 959 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
| 960 | |
| 961 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, |
| 962 | nwname, wnames); |
| 963 | if (IS_ERR(req)) { |
| 964 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 965 | goto error; |
| 966 | } |
| 967 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 968 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 969 | if (err) { |
| 970 | p9pdu_dump(1, req->rc); |
| 971 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 972 | goto clunk_fid; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 973 | } |
| 974 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 975 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 976 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
| 977 | |
| 978 | if (nwqids != nwname) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 979 | err = -ENOENT; |
| 980 | goto clunk_fid; |
| 981 | } |
| 982 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 983 | for (count = 0; count < nwqids; count++) |
| 984 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 985 | count, wqids[count].type, |
| 986 | (unsigned long long)wqids[count].path, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 987 | wqids[count].version); |
| 988 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 989 | if (nwname) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 990 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 991 | else |
| 992 | fid->qid = oldfid->qid; |
| 993 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 994 | kfree(wqids); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 995 | return fid; |
| 996 | |
| 997 | clunk_fid: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 998 | kfree(wqids); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 999 | p9_client_clunk(fid); |
| 1000 | fid = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1001 | |
| 1002 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1003 | if (fid && (fid != oldfid)) |
| 1004 | p9_fid_destroy(fid); |
| 1005 | |
| 1006 | return ERR_PTR(err); |
| 1007 | } |
| 1008 | EXPORT_SYMBOL(p9_client_walk); |
| 1009 | |
| 1010 | int p9_client_open(struct p9_fid *fid, int mode) |
| 1011 | { |
| 1012 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1013 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1014 | struct p9_req_t *req; |
| 1015 | struct p9_qid qid; |
| 1016 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1017 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1018 | clnt = fid->clnt; |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1019 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
| 1020 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
| 1021 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1022 | |
| 1023 | if (fid->mode != -1) |
| 1024 | return -EINVAL; |
| 1025 | |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1026 | if (p9_is_proto_dotl(clnt)) |
| 1027 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); |
| 1028 | else |
| 1029 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1030 | if (IS_ERR(req)) { |
| 1031 | err = PTR_ERR(req); |
| 1032 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1033 | } |
| 1034 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1035 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1036 | if (err) { |
| 1037 | p9pdu_dump(1, req->rc); |
| 1038 | goto free_and_error; |
| 1039 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1040 | |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1041 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
| 1042 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
| 1043 | (unsigned long long)qid.path, qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1044 | |
| 1045 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1046 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1047 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1048 | free_and_error: |
| 1049 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1050 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1051 | return err; |
| 1052 | } |
| 1053 | EXPORT_SYMBOL(p9_client_open); |
| 1054 | |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1055 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
| 1056 | gid_t gid, struct p9_qid *qid) |
| 1057 | { |
| 1058 | int err = 0; |
| 1059 | struct p9_client *clnt; |
| 1060 | struct p9_req_t *req; |
| 1061 | int iounit; |
| 1062 | |
| 1063 | P9_DPRINTK(P9_DEBUG_9P, |
| 1064 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
| 1065 | ofid->fid, name, flags, mode, gid); |
| 1066 | clnt = ofid->clnt; |
| 1067 | |
| 1068 | if (ofid->mode != -1) |
| 1069 | return -EINVAL; |
| 1070 | |
| 1071 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, |
| 1072 | mode, gid); |
| 1073 | if (IS_ERR(req)) { |
| 1074 | err = PTR_ERR(req); |
| 1075 | goto error; |
| 1076 | } |
| 1077 | |
| 1078 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); |
| 1079 | if (err) { |
| 1080 | p9pdu_dump(1, req->rc); |
| 1081 | goto free_and_error; |
| 1082 | } |
| 1083 | |
| 1084 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
| 1085 | qid->type, |
| 1086 | (unsigned long long)qid->path, |
| 1087 | qid->version, iounit); |
| 1088 | |
| 1089 | ofid->mode = mode; |
| 1090 | ofid->iounit = iounit; |
| 1091 | |
| 1092 | free_and_error: |
| 1093 | p9_free_req(clnt, req); |
| 1094 | error: |
| 1095 | return err; |
| 1096 | } |
| 1097 | EXPORT_SYMBOL(p9_client_create_dotl); |
| 1098 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1099 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
| 1100 | char *extension) |
| 1101 | { |
| 1102 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1103 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1104 | struct p9_req_t *req; |
| 1105 | struct p9_qid qid; |
| 1106 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1107 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1108 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
| 1109 | fid->fid, name, perm, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1110 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1111 | clnt = fid->clnt; |
| 1112 | |
| 1113 | if (fid->mode != -1) |
| 1114 | return -EINVAL; |
| 1115 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1116 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
| 1117 | mode, extension); |
| 1118 | if (IS_ERR(req)) { |
| 1119 | err = PTR_ERR(req); |
| 1120 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1121 | } |
| 1122 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1123 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1124 | if (err) { |
| 1125 | p9pdu_dump(1, req->rc); |
| 1126 | goto free_and_error; |
| 1127 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1128 | |
| 1129 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1130 | qid.type, |
| 1131 | (unsigned long long)qid.path, |
| 1132 | qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1133 | |
| 1134 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1135 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1136 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1137 | free_and_error: |
| 1138 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1139 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1140 | return err; |
| 1141 | } |
| 1142 | EXPORT_SYMBOL(p9_client_fcreate); |
| 1143 | |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1144 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
| 1145 | struct p9_qid *qid) |
| 1146 | { |
| 1147 | int err = 0; |
| 1148 | struct p9_client *clnt; |
| 1149 | struct p9_req_t *req; |
| 1150 | |
| 1151 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
| 1152 | dfid->fid, name, symtgt); |
| 1153 | clnt = dfid->clnt; |
| 1154 | |
| 1155 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, |
| 1156 | gid); |
| 1157 | if (IS_ERR(req)) { |
| 1158 | err = PTR_ERR(req); |
| 1159 | goto error; |
| 1160 | } |
| 1161 | |
| 1162 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 1163 | if (err) { |
| 1164 | p9pdu_dump(1, req->rc); |
| 1165 | goto free_and_error; |
| 1166 | } |
| 1167 | |
| 1168 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
| 1169 | qid->type, (unsigned long long)qid->path, qid->version); |
| 1170 | |
| 1171 | free_and_error: |
| 1172 | p9_free_req(clnt, req); |
| 1173 | error: |
| 1174 | return err; |
| 1175 | } |
| 1176 | EXPORT_SYMBOL(p9_client_symlink); |
| 1177 | |
Venkateswararao Jujjuri (JV) | 652df9a | 2010-06-03 15:16:59 -0700 | [diff] [blame] | 1178 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
| 1179 | { |
| 1180 | struct p9_client *clnt; |
| 1181 | struct p9_req_t *req; |
| 1182 | |
| 1183 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
| 1184 | dfid->fid, oldfid->fid, newname); |
| 1185 | clnt = dfid->clnt; |
| 1186 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, |
| 1187 | newname); |
| 1188 | if (IS_ERR(req)) |
| 1189 | return PTR_ERR(req); |
| 1190 | |
| 1191 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); |
| 1192 | p9_free_req(clnt, req); |
| 1193 | return 0; |
| 1194 | } |
| 1195 | EXPORT_SYMBOL(p9_client_link); |
| 1196 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1197 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1198 | { |
| 1199 | int err; |
| 1200 | struct p9_client *clnt; |
| 1201 | struct p9_req_t *req; |
| 1202 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1203 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
| 1204 | fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1205 | err = 0; |
| 1206 | clnt = fid->clnt; |
| 1207 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1208 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1209 | if (IS_ERR(req)) { |
| 1210 | err = PTR_ERR(req); |
| 1211 | goto error; |
| 1212 | } |
| 1213 | |
| 1214 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
| 1215 | |
| 1216 | p9_free_req(clnt, req); |
| 1217 | |
| 1218 | error: |
| 1219 | return err; |
| 1220 | } |
| 1221 | EXPORT_SYMBOL(p9_client_fsync); |
| 1222 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1223 | int p9_client_clunk(struct p9_fid *fid) |
| 1224 | { |
| 1225 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1226 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1227 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1228 | |
jvrao | 8e44a08 | 2010-08-25 16:27:06 +0000 | [diff] [blame] | 1229 | if (!fid) { |
| 1230 | P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); |
| 1231 | dump_stack(); |
| 1232 | return 0; |
| 1233 | } |
| 1234 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1235 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1236 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1237 | clnt = fid->clnt; |
| 1238 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1239 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
| 1240 | if (IS_ERR(req)) { |
| 1241 | err = PTR_ERR(req); |
| 1242 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1243 | } |
| 1244 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1245 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1246 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1247 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1248 | p9_fid_destroy(fid); |
| 1249 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1250 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1251 | return err; |
| 1252 | } |
| 1253 | EXPORT_SYMBOL(p9_client_clunk); |
| 1254 | |
| 1255 | int p9_client_remove(struct p9_fid *fid) |
| 1256 | { |
| 1257 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1258 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1259 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1260 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1261 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1262 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1263 | clnt = fid->clnt; |
| 1264 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1265 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
| 1266 | if (IS_ERR(req)) { |
| 1267 | err = PTR_ERR(req); |
| 1268 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1269 | } |
| 1270 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1271 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1272 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1273 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1274 | error: |
Aneesh Kumar K.V | 0b1208b | 2010-07-02 12:21:20 +0530 | [diff] [blame] | 1275 | p9_fid_destroy(fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1276 | return err; |
| 1277 | } |
| 1278 | EXPORT_SYMBOL(p9_client_remove); |
| 1279 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1280 | int |
| 1281 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, |
| 1282 | u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1283 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1284 | int err, rsize, total; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1285 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1286 | struct p9_req_t *req; |
| 1287 | char *dataptr; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1288 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1289 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1290 | (long long unsigned) offset, count); |
| 1291 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1292 | clnt = fid->clnt; |
| 1293 | total = 0; |
| 1294 | |
| 1295 | rsize = fid->iounit; |
| 1296 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1297 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1298 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1299 | if (count < rsize) |
| 1300 | rsize = count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1301 | |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1302 | /* Don't bother zerocopy form small IO (< 1024) */ |
| 1303 | if (((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) == |
| 1304 | P9_TRANS_PREF_PAYLOAD_SEP) && (rsize > 1024)) { |
| 1305 | req = p9_client_rpc(clnt, P9_TREAD, "dqE", fid->fid, offset, |
| 1306 | rsize, data, udata); |
| 1307 | } else { |
| 1308 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
| 1309 | rsize); |
| 1310 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1311 | if (IS_ERR(req)) { |
| 1312 | err = PTR_ERR(req); |
| 1313 | goto error; |
| 1314 | } |
| 1315 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1316 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1317 | if (err) { |
| 1318 | p9pdu_dump(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1319 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1320 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1321 | |
| 1322 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
| 1323 | |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1324 | if (!req->tc->pbuf_size) { |
| 1325 | if (data) { |
| 1326 | memmove(data, dataptr, count); |
| 1327 | } else { |
| 1328 | err = copy_to_user(udata, dataptr, count); |
| 1329 | if (err) { |
| 1330 | err = -EFAULT; |
| 1331 | goto free_and_error; |
| 1332 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1333 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1334 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1335 | p9_free_req(clnt, req); |
| 1336 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1337 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1338 | free_and_error: |
| 1339 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1340 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1341 | return err; |
| 1342 | } |
| 1343 | EXPORT_SYMBOL(p9_client_read); |
| 1344 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1345 | int |
| 1346 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
| 1347 | u64 offset, u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1348 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1349 | int err, rsize, total; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1350 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1351 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1352 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1353 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
| 1354 | fid->fid, (long long unsigned) offset, count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1355 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1356 | clnt = fid->clnt; |
| 1357 | total = 0; |
| 1358 | |
| 1359 | rsize = fid->iounit; |
| 1360 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1361 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1362 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1363 | if (count < rsize) |
| 1364 | rsize = count; |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1365 | |
| 1366 | /* Don't bother zerocopy form small IO (< 1024) */ |
| 1367 | if (((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) == |
| 1368 | P9_TRANS_PREF_PAYLOAD_SEP) && (rsize > 1024)) { |
| 1369 | req = p9_client_rpc(clnt, P9_TWRITE, "dqE", fid->fid, offset, |
| 1370 | rsize, data, udata); |
| 1371 | } else { |
| 1372 | |
| 1373 | if (data) |
| 1374 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, |
| 1375 | offset, rsize, data); |
| 1376 | else |
| 1377 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, |
| 1378 | offset, rsize, udata); |
| 1379 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1380 | if (IS_ERR(req)) { |
| 1381 | err = PTR_ERR(req); |
| 1382 | goto error; |
| 1383 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1384 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1385 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1386 | if (err) { |
| 1387 | p9pdu_dump(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1388 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1389 | } |
| 1390 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1391 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1392 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1393 | p9_free_req(clnt, req); |
| 1394 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1395 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1396 | free_and_error: |
| 1397 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1398 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1399 | return err; |
| 1400 | } |
| 1401 | EXPORT_SYMBOL(p9_client_write); |
| 1402 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1403 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1404 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1405 | int err; |
| 1406 | struct p9_client *clnt; |
| 1407 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); |
| 1408 | struct p9_req_t *req; |
| 1409 | u16 ignored; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1410 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1411 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1412 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1413 | if (!ret) |
| 1414 | return ERR_PTR(-ENOMEM); |
| 1415 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1416 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1417 | clnt = fid->clnt; |
| 1418 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1419 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
| 1420 | if (IS_ERR(req)) { |
| 1421 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1422 | goto error; |
| 1423 | } |
| 1424 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1425 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1426 | if (err) { |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1427 | p9pdu_dump(1, req->rc); |
Abhishek Kulkarni | eedfe1c | 2009-07-14 13:25:41 -0500 | [diff] [blame] | 1428 | p9_free_req(clnt, req); |
| 1429 | goto error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1430 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1431 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1432 | P9_DPRINTK(P9_DEBUG_9P, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1433 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1434 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1435 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1436 | "<<< uid=%d gid=%d n_muid=%d\n", |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1437 | ret->size, ret->type, ret->dev, ret->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1438 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
| 1439 | ret->atime, ret->mtime, (unsigned long long)ret->length, |
| 1440 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1441 | ret->n_uid, ret->n_gid, ret->n_muid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1442 | |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1443 | p9_free_req(clnt, req); |
| 1444 | return ret; |
| 1445 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1446 | error: |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1447 | kfree(ret); |
| 1448 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1449 | } |
| 1450 | EXPORT_SYMBOL(p9_client_stat); |
| 1451 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1452 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
| 1453 | u64 request_mask) |
| 1454 | { |
| 1455 | int err; |
| 1456 | struct p9_client *clnt; |
| 1457 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), |
| 1458 | GFP_KERNEL); |
| 1459 | struct p9_req_t *req; |
| 1460 | |
| 1461 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
| 1462 | fid->fid, request_mask); |
| 1463 | |
| 1464 | if (!ret) |
| 1465 | return ERR_PTR(-ENOMEM); |
| 1466 | |
| 1467 | err = 0; |
| 1468 | clnt = fid->clnt; |
| 1469 | |
| 1470 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); |
| 1471 | if (IS_ERR(req)) { |
| 1472 | err = PTR_ERR(req); |
| 1473 | goto error; |
| 1474 | } |
| 1475 | |
| 1476 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); |
| 1477 | if (err) { |
| 1478 | p9pdu_dump(1, req->rc); |
| 1479 | p9_free_req(clnt, req); |
| 1480 | goto error; |
| 1481 | } |
| 1482 | |
| 1483 | P9_DPRINTK(P9_DEBUG_9P, |
| 1484 | "<<< RGETATTR st_result_mask=%lld\n" |
| 1485 | "<<< qid=%x.%llx.%x\n" |
| 1486 | "<<< st_mode=%8.8x st_nlink=%llu\n" |
| 1487 | "<<< st_uid=%d st_gid=%d\n" |
| 1488 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" |
| 1489 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" |
| 1490 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" |
| 1491 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" |
| 1492 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" |
| 1493 | "<<< st_gen=%lld st_data_version=%lld", |
| 1494 | ret->st_result_mask, ret->qid.type, ret->qid.path, |
| 1495 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, |
| 1496 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, |
| 1497 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
| 1498 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, |
| 1499 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, |
| 1500 | ret->st_gen, ret->st_data_version); |
| 1501 | |
| 1502 | p9_free_req(clnt, req); |
| 1503 | return ret; |
| 1504 | |
| 1505 | error: |
| 1506 | kfree(ret); |
| 1507 | return ERR_PTR(err); |
| 1508 | } |
| 1509 | EXPORT_SYMBOL(p9_client_getattr_dotl); |
| 1510 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1511 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1512 | { |
| 1513 | int ret; |
| 1514 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1515 | /* NOTE: size shouldn't include its own length */ |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1516 | /* size[2] type[2] dev[4] qid[13] */ |
| 1517 | /* mode[4] atime[4] mtime[4] length[8]*/ |
| 1518 | /* name[s] uid[s] gid[s] muid[s] */ |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1519 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1520 | |
| 1521 | if (wst->name) |
| 1522 | ret += strlen(wst->name); |
| 1523 | if (wst->uid) |
| 1524 | ret += strlen(wst->uid); |
| 1525 | if (wst->gid) |
| 1526 | ret += strlen(wst->gid); |
| 1527 | if (wst->muid) |
| 1528 | ret += strlen(wst->muid); |
| 1529 | |
Sripathi Kodi | c56e4ac | 2010-03-25 12:40:35 +0000 | [diff] [blame] | 1530 | if ((proto_version == p9_proto_2000u) || |
| 1531 | (proto_version == p9_proto_2000L)) { |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1532 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
| 1533 | if (wst->extension) |
| 1534 | ret += strlen(wst->extension); |
| 1535 | } |
| 1536 | |
| 1537 | return ret; |
| 1538 | } |
| 1539 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1540 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
| 1541 | { |
| 1542 | int err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1543 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1544 | struct p9_client *clnt; |
| 1545 | |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1546 | err = 0; |
| 1547 | clnt = fid->clnt; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1548 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1549 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1550 | P9_DPRINTK(P9_DEBUG_9P, |
| 1551 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1552 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1553 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1554 | " uid=%d gid=%d n_muid=%d\n", |
| 1555 | wst->size, wst->type, wst->dev, wst->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1556 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
| 1557 | wst->atime, wst->mtime, (unsigned long long)wst->length, |
| 1558 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1559 | wst->n_uid, wst->n_gid, wst->n_muid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1560 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1561 | req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1562 | if (IS_ERR(req)) { |
| 1563 | err = PTR_ERR(req); |
| 1564 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1565 | } |
| 1566 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1567 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1568 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1569 | p9_free_req(clnt, req); |
| 1570 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1571 | return err; |
| 1572 | } |
| 1573 | EXPORT_SYMBOL(p9_client_wstat); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1574 | |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1575 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
| 1576 | { |
| 1577 | int err; |
| 1578 | struct p9_req_t *req; |
| 1579 | struct p9_client *clnt; |
| 1580 | |
| 1581 | err = 0; |
| 1582 | clnt = fid->clnt; |
| 1583 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
| 1584 | P9_DPRINTK(P9_DEBUG_9P, |
| 1585 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
| 1586 | " atime_sec=%lld atime_nsec=%lld\n" |
| 1587 | " mtime_sec=%lld mtime_nsec=%lld\n", |
| 1588 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, |
| 1589 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
| 1590 | p9attr->mtime_sec, p9attr->mtime_nsec); |
| 1591 | |
| 1592 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); |
| 1593 | |
| 1594 | if (IS_ERR(req)) { |
| 1595 | err = PTR_ERR(req); |
| 1596 | goto error; |
| 1597 | } |
| 1598 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
| 1599 | p9_free_req(clnt, req); |
| 1600 | error: |
| 1601 | return err; |
| 1602 | } |
| 1603 | EXPORT_SYMBOL(p9_client_setattr); |
| 1604 | |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1605 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
| 1606 | { |
| 1607 | int err; |
| 1608 | struct p9_req_t *req; |
| 1609 | struct p9_client *clnt; |
| 1610 | |
| 1611 | err = 0; |
| 1612 | clnt = fid->clnt; |
| 1613 | |
| 1614 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
| 1615 | |
| 1616 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); |
| 1617 | if (IS_ERR(req)) { |
| 1618 | err = PTR_ERR(req); |
| 1619 | goto error; |
| 1620 | } |
| 1621 | |
| 1622 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, |
| 1623 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, |
| 1624 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); |
| 1625 | if (err) { |
| 1626 | p9pdu_dump(1, req->rc); |
| 1627 | p9_free_req(clnt, req); |
| 1628 | goto error; |
| 1629 | } |
| 1630 | |
| 1631 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
| 1632 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
| 1633 | "fsid %llu namelen %ld\n", |
| 1634 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, |
| 1635 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, |
| 1636 | sb->fsid, (long int)sb->namelen); |
| 1637 | |
| 1638 | p9_free_req(clnt, req); |
| 1639 | error: |
| 1640 | return err; |
| 1641 | } |
| 1642 | EXPORT_SYMBOL(p9_client_statfs); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1643 | |
| 1644 | int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) |
| 1645 | { |
| 1646 | int err; |
| 1647 | struct p9_req_t *req; |
| 1648 | struct p9_client *clnt; |
| 1649 | |
| 1650 | err = 0; |
| 1651 | clnt = fid->clnt; |
| 1652 | |
| 1653 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
| 1654 | fid->fid, newdirfid->fid, name); |
| 1655 | |
| 1656 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, |
| 1657 | newdirfid->fid, name); |
| 1658 | if (IS_ERR(req)) { |
| 1659 | err = PTR_ERR(req); |
| 1660 | goto error; |
| 1661 | } |
| 1662 | |
| 1663 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
| 1664 | |
| 1665 | p9_free_req(clnt, req); |
| 1666 | error: |
| 1667 | return err; |
| 1668 | } |
| 1669 | EXPORT_SYMBOL(p9_client_rename); |
| 1670 | |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 1671 | /* |
| 1672 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace |
| 1673 | */ |
| 1674 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, |
| 1675 | const char *attr_name, u64 *attr_size) |
| 1676 | { |
| 1677 | int err; |
| 1678 | struct p9_req_t *req; |
| 1679 | struct p9_client *clnt; |
| 1680 | struct p9_fid *attr_fid; |
| 1681 | |
| 1682 | err = 0; |
| 1683 | clnt = file_fid->clnt; |
| 1684 | attr_fid = p9_fid_create(clnt); |
| 1685 | if (IS_ERR(attr_fid)) { |
| 1686 | err = PTR_ERR(attr_fid); |
| 1687 | attr_fid = NULL; |
| 1688 | goto error; |
| 1689 | } |
| 1690 | P9_DPRINTK(P9_DEBUG_9P, |
| 1691 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
| 1692 | file_fid->fid, attr_fid->fid, attr_name); |
| 1693 | |
| 1694 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", |
| 1695 | file_fid->fid, attr_fid->fid, attr_name); |
| 1696 | if (IS_ERR(req)) { |
| 1697 | err = PTR_ERR(req); |
| 1698 | goto error; |
| 1699 | } |
| 1700 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); |
| 1701 | if (err) { |
| 1702 | p9pdu_dump(1, req->rc); |
| 1703 | p9_free_req(clnt, req); |
| 1704 | goto clunk_fid; |
| 1705 | } |
| 1706 | p9_free_req(clnt, req); |
| 1707 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
| 1708 | attr_fid->fid, *attr_size); |
| 1709 | return attr_fid; |
| 1710 | clunk_fid: |
| 1711 | p9_client_clunk(attr_fid); |
| 1712 | attr_fid = NULL; |
| 1713 | error: |
| 1714 | if (attr_fid && (attr_fid != file_fid)) |
| 1715 | p9_fid_destroy(attr_fid); |
| 1716 | |
| 1717 | return ERR_PTR(err); |
| 1718 | } |
| 1719 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); |
| 1720 | |
Aneesh Kumar K.V | eda25e46 | 2010-05-31 13:22:50 +0530 | [diff] [blame] | 1721 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
| 1722 | u64 attr_size, int flags) |
| 1723 | { |
| 1724 | int err; |
| 1725 | struct p9_req_t *req; |
| 1726 | struct p9_client *clnt; |
| 1727 | |
| 1728 | P9_DPRINTK(P9_DEBUG_9P, |
| 1729 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
| 1730 | fid->fid, name, (long long)attr_size, flags); |
| 1731 | err = 0; |
| 1732 | clnt = fid->clnt; |
| 1733 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", |
| 1734 | fid->fid, name, attr_size, flags); |
| 1735 | if (IS_ERR(req)) { |
| 1736 | err = PTR_ERR(req); |
| 1737 | goto error; |
| 1738 | } |
| 1739 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
| 1740 | p9_free_req(clnt, req); |
| 1741 | error: |
| 1742 | return err; |
| 1743 | } |
| 1744 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); |
| 1745 | |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 1746 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
| 1747 | { |
| 1748 | int err, rsize, total; |
| 1749 | struct p9_client *clnt; |
| 1750 | struct p9_req_t *req; |
| 1751 | char *dataptr; |
| 1752 | |
| 1753 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
| 1754 | fid->fid, (long long unsigned) offset, count); |
| 1755 | |
| 1756 | err = 0; |
| 1757 | clnt = fid->clnt; |
| 1758 | total = 0; |
| 1759 | |
| 1760 | rsize = fid->iounit; |
| 1761 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) |
| 1762 | rsize = clnt->msize - P9_READDIRHDRSZ; |
| 1763 | |
| 1764 | if (count < rsize) |
| 1765 | rsize = count; |
| 1766 | |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 1767 | if ((clnt->trans_mod->pref & P9_TRANS_PREF_PAYLOAD_MASK) == |
| 1768 | P9_TRANS_PREF_PAYLOAD_SEP) { |
| 1769 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqF", fid->fid, |
| 1770 | offset, rsize, data); |
| 1771 | } else { |
| 1772 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
| 1773 | offset, rsize); |
| 1774 | } |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 1775 | if (IS_ERR(req)) { |
| 1776 | err = PTR_ERR(req); |
| 1777 | goto error; |
| 1778 | } |
| 1779 | |
| 1780 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
| 1781 | if (err) { |
| 1782 | p9pdu_dump(1, req->rc); |
| 1783 | goto free_and_error; |
| 1784 | } |
| 1785 | |
| 1786 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
| 1787 | |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 1788 | if (!req->tc->pbuf_size && data) |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 1789 | memmove(data, dataptr, count); |
| 1790 | |
| 1791 | p9_free_req(clnt, req); |
| 1792 | return count; |
| 1793 | |
| 1794 | free_and_error: |
| 1795 | p9_free_req(clnt, req); |
| 1796 | error: |
| 1797 | return err; |
| 1798 | } |
| 1799 | EXPORT_SYMBOL(p9_client_readdir); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1800 | |
| 1801 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, |
| 1802 | dev_t rdev, gid_t gid, struct p9_qid *qid) |
| 1803 | { |
| 1804 | int err; |
| 1805 | struct p9_client *clnt; |
| 1806 | struct p9_req_t *req; |
| 1807 | |
| 1808 | err = 0; |
| 1809 | clnt = fid->clnt; |
| 1810 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
| 1811 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1812 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, |
| 1813 | MAJOR(rdev), MINOR(rdev), gid); |
| 1814 | if (IS_ERR(req)) |
| 1815 | return PTR_ERR(req); |
| 1816 | |
| 1817 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 1818 | if (err) { |
| 1819 | p9pdu_dump(1, req->rc); |
| 1820 | goto error; |
| 1821 | } |
| 1822 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
| 1823 | (unsigned long long)qid->path, qid->version); |
| 1824 | |
| 1825 | error: |
| 1826 | p9_free_req(clnt, req); |
| 1827 | return err; |
| 1828 | |
| 1829 | } |
| 1830 | EXPORT_SYMBOL(p9_client_mknod_dotl); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 1831 | |
| 1832 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, |
| 1833 | gid_t gid, struct p9_qid *qid) |
| 1834 | { |
| 1835 | int err; |
| 1836 | struct p9_client *clnt; |
| 1837 | struct p9_req_t *req; |
| 1838 | |
| 1839 | err = 0; |
| 1840 | clnt = fid->clnt; |
| 1841 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
| 1842 | fid->fid, name, mode, gid); |
| 1843 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, |
| 1844 | gid); |
| 1845 | if (IS_ERR(req)) |
| 1846 | return PTR_ERR(req); |
| 1847 | |
| 1848 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 1849 | if (err) { |
| 1850 | p9pdu_dump(1, req->rc); |
| 1851 | goto error; |
| 1852 | } |
| 1853 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
| 1854 | (unsigned long long)qid->path, qid->version); |
| 1855 | |
| 1856 | error: |
| 1857 | p9_free_req(clnt, req); |
| 1858 | return err; |
| 1859 | |
| 1860 | } |
| 1861 | EXPORT_SYMBOL(p9_client_mkdir_dotl); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 1862 | |
| 1863 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) |
| 1864 | { |
| 1865 | int err; |
| 1866 | struct p9_client *clnt; |
| 1867 | struct p9_req_t *req; |
| 1868 | |
| 1869 | err = 0; |
| 1870 | clnt = fid->clnt; |
| 1871 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
| 1872 | "start %lld length %lld proc_id %d client_id %s\n", |
| 1873 | fid->fid, flock->type, flock->flags, flock->start, |
| 1874 | flock->length, flock->proc_id, flock->client_id); |
| 1875 | |
| 1876 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, |
| 1877 | flock->flags, flock->start, flock->length, |
| 1878 | flock->proc_id, flock->client_id); |
| 1879 | |
| 1880 | if (IS_ERR(req)) |
| 1881 | return PTR_ERR(req); |
| 1882 | |
| 1883 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); |
| 1884 | if (err) { |
| 1885 | p9pdu_dump(1, req->rc); |
| 1886 | goto error; |
| 1887 | } |
| 1888 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
| 1889 | error: |
| 1890 | p9_free_req(clnt, req); |
| 1891 | return err; |
| 1892 | |
| 1893 | } |
| 1894 | EXPORT_SYMBOL(p9_client_lock_dotl); |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 1895 | |
| 1896 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) |
| 1897 | { |
| 1898 | int err; |
| 1899 | struct p9_client *clnt; |
| 1900 | struct p9_req_t *req; |
| 1901 | |
| 1902 | err = 0; |
| 1903 | clnt = fid->clnt; |
| 1904 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
| 1905 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
| 1906 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 1907 | |
| 1908 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, |
| 1909 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 1910 | |
| 1911 | if (IS_ERR(req)) |
| 1912 | return PTR_ERR(req); |
| 1913 | |
| 1914 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, |
| 1915 | &glock->start, &glock->length, &glock->proc_id, |
| 1916 | &glock->client_id); |
| 1917 | if (err) { |
| 1918 | p9pdu_dump(1, req->rc); |
| 1919 | goto error; |
| 1920 | } |
| 1921 | P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
| 1922 | "proc_id %d client_id %s\n", glock->type, glock->start, |
| 1923 | glock->length, glock->proc_id, glock->client_id); |
| 1924 | error: |
| 1925 | p9_free_req(clnt, req); |
| 1926 | return err; |
| 1927 | } |
| 1928 | EXPORT_SYMBOL(p9_client_getlock_dotl); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 1929 | |
| 1930 | int p9_client_readlink(struct p9_fid *fid, char **target) |
| 1931 | { |
| 1932 | int err; |
| 1933 | struct p9_client *clnt; |
| 1934 | struct p9_req_t *req; |
| 1935 | |
| 1936 | err = 0; |
| 1937 | clnt = fid->clnt; |
| 1938 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
| 1939 | |
| 1940 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); |
| 1941 | if (IS_ERR(req)) |
| 1942 | return PTR_ERR(req); |
| 1943 | |
| 1944 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); |
| 1945 | if (err) { |
| 1946 | p9pdu_dump(1, req->rc); |
| 1947 | goto error; |
| 1948 | } |
| 1949 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
| 1950 | error: |
| 1951 | p9_free_req(clnt, req); |
| 1952 | return err; |
| 1953 | } |
| 1954 | EXPORT_SYMBOL(p9_client_readlink); |