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 */ |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 75 | static int get_protocol_version(char *s) |
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 | |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 79 | if (!strcmp(s, "9p2000")) { |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 80 | version = p9_proto_legacy; |
| 81 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 82 | } else if (!strcmp(s, "9p2000.u")) { |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 83 | version = p9_proto_2000u; |
| 84 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 85 | } else if (!strcmp(s, "9p2000.L")) { |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 86 | version = p9_proto_2000L; |
| 87 | P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 88 | } else |
| 89 | printk(KERN_INFO "9p: Unknown protocol version %s.\n", s); |
| 90 | |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 91 | return version; |
| 92 | } |
| 93 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 94 | /** |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 95 | * parse_options - parse mount options into client structure |
| 96 | * @opts: options string passed from mount |
| 97 | * @clnt: existing v9fs client information |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 98 | * |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 99 | * Return 0 upon success, -ERRNO upon failure |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 100 | */ |
| 101 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 102 | static int parse_opts(char *opts, struct p9_client *clnt) |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 103 | { |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 104 | char *options, *tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 105 | char *p; |
| 106 | substring_t args[MAX_OPT_ARGS]; |
| 107 | int option; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 108 | char *s; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 109 | int ret = 0; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 110 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 111 | clnt->proto_version = p9_proto_2000u; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 112 | clnt->msize = 8192; |
| 113 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 114 | if (!opts) |
| 115 | return 0; |
| 116 | |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 117 | tmp_options = kstrdup(opts, GFP_KERNEL); |
| 118 | if (!tmp_options) { |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 119 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 120 | "failed to allocate copy of option string\n"); |
| 121 | return -ENOMEM; |
| 122 | } |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 123 | options = tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 124 | |
| 125 | while ((p = strsep(&options, ",")) != NULL) { |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame^] | 126 | int token, r; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 127 | if (!*p) |
| 128 | continue; |
| 129 | token = match_token(p, tokens, args); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame^] | 130 | switch (token) { |
| 131 | case Opt_msize: |
| 132 | r = match_int(&args[0], &option); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 133 | if (r < 0) { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 134 | P9_DPRINTK(P9_DEBUG_ERROR, |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame^] | 135 | "integer field, but no integer?\n"); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 136 | ret = r; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 137 | continue; |
| 138 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 139 | clnt->msize = option; |
| 140 | break; |
| 141 | case Opt_trans: |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 142 | s = match_strdup(&args[0]); |
| 143 | if (!s) { |
| 144 | ret = -ENOMEM; |
Eric Van Hensbergen | 349d3bb | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 145 | P9_DPRINTK(P9_DEBUG_ERROR, |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 146 | "problem allocating copy of trans arg\n"); |
| 147 | goto free_and_return; |
| 148 | } |
| 149 | clnt->trans_mod = v9fs_get_trans_by_name(s); |
| 150 | if (clnt->trans_mod == NULL) { |
| 151 | printk(KERN_INFO |
| 152 | "9p: Could not find " |
| 153 | "request transport: %s\n", s); |
Eric Van Hensbergen | 349d3bb | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 154 | ret = -EINVAL; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 155 | kfree(s); |
Eric Van Hensbergen | 349d3bb | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 156 | goto free_and_return; |
| 157 | } |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 158 | kfree(s); |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 159 | break; |
| 160 | case Opt_legacy: |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 161 | clnt->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 162 | break; |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 163 | case Opt_version: |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 164 | s = match_strdup(&args[0]); |
| 165 | if (!s) { |
| 166 | ret = -ENOMEM; |
| 167 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 168 | "problem allocating copy of version arg\n"); |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 169 | goto free_and_return; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 170 | } |
| 171 | ret = get_protocol_version(s); |
| 172 | if (ret == -EINVAL) { |
| 173 | kfree(s); |
| 174 | goto free_and_return; |
| 175 | } |
| 176 | kfree(s); |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 177 | clnt->proto_version = ret; |
| 178 | break; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 179 | default: |
| 180 | continue; |
| 181 | } |
| 182 | } |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 183 | |
Eric Van Hensbergen | 349d3bb | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 184 | free_and_return: |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 185 | kfree(tmp_options); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 186 | return ret; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 187 | } |
| 188 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 189 | /** |
| 190 | * p9_tag_alloc - lookup/allocate a request by tag |
| 191 | * @c: client session to lookup tag within |
| 192 | * @tag: numeric id for transaction |
| 193 | * |
| 194 | * this is a simple array lookup, but will grow the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 195 | * request_slots as necessary to accommodate transaction |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 196 | * ids which did not previously have a slot. |
| 197 | * |
| 198 | * this code relies on the client spinlock to manage locks, its |
| 199 | * possible we should switch to something else, but I'd rather |
| 200 | * stick with something low-overhead for the common case. |
| 201 | * |
| 202 | */ |
| 203 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 204 | static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag, int max_size) |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 205 | { |
| 206 | unsigned long flags; |
| 207 | int row, col; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 208 | struct p9_req_t *req; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 209 | int alloc_msize = min(c->msize, max_size); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 210 | |
| 211 | /* This looks up the original request by tag so we know which |
| 212 | * buffer to read the data into */ |
| 213 | tag++; |
| 214 | |
| 215 | if (tag >= c->max_tag) { |
| 216 | spin_lock_irqsave(&c->lock, flags); |
| 217 | /* check again since original check was outside of lock */ |
| 218 | while (tag >= c->max_tag) { |
| 219 | row = (tag / P9_ROW_MAXTAG); |
| 220 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, |
| 221 | sizeof(struct p9_req_t), GFP_ATOMIC); |
| 222 | |
| 223 | if (!c->reqs[row]) { |
| 224 | printk(KERN_ERR "Couldn't grow tag array\n"); |
Eric Van Hensbergen | e45c540 | 2008-10-22 18:54:47 -0500 | [diff] [blame] | 225 | spin_unlock_irqrestore(&c->lock, flags); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 226 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 227 | } |
| 228 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 229 | c->reqs[row][col].status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 230 | c->reqs[row][col].tc = NULL; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 231 | } |
| 232 | c->max_tag += P9_ROW_MAXTAG; |
| 233 | } |
| 234 | spin_unlock_irqrestore(&c->lock, flags); |
| 235 | } |
| 236 | row = tag / P9_ROW_MAXTAG; |
| 237 | col = tag % P9_ROW_MAXTAG; |
| 238 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 239 | req = &c->reqs[row][col]; |
| 240 | if (!req->tc) { |
Aneesh Kumar K.V | eeff66e | 2011-03-08 16:39:47 +0530 | [diff] [blame] | 241 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 242 | if (!req->wq) { |
| 243 | printk(KERN_ERR "Couldn't grow tag array\n"); |
| 244 | return ERR_PTR(-ENOMEM); |
| 245 | } |
| 246 | init_waitqueue_head(req->wq); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 247 | req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
| 248 | GFP_NOFS); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 249 | req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, |
| 250 | GFP_NOFS); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 251 | if ((!req->tc) || (!req->rc)) { |
| 252 | printk(KERN_ERR "Couldn't grow tag array\n"); |
| 253 | kfree(req->tc); |
| 254 | kfree(req->rc); |
Tom Tucker | 45abdf1 | 2008-10-23 16:33:25 -0500 | [diff] [blame] | 255 | kfree(req->wq); |
| 256 | req->tc = req->rc = NULL; |
| 257 | req->wq = NULL; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 258 | return ERR_PTR(-ENOMEM); |
| 259 | } |
Dan Carpenter | 5635fd0 | 2011-08-26 19:55:59 +0300 | [diff] [blame] | 260 | req->tc->capacity = alloc_msize; |
| 261 | req->rc->capacity = alloc_msize; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 262 | req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 263 | req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | p9pdu_reset(req->tc); |
| 267 | p9pdu_reset(req->rc); |
| 268 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 269 | req->tc->tag = tag-1; |
| 270 | req->status = REQ_STATUS_ALLOC; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 271 | |
| 272 | return &c->reqs[row][col]; |
| 273 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 274 | |
| 275 | /** |
| 276 | * p9_tag_lookup - lookup a request by tag |
| 277 | * @c: client session to lookup tag within |
| 278 | * @tag: numeric id for transaction |
| 279 | * |
| 280 | */ |
| 281 | |
| 282 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) |
| 283 | { |
| 284 | int row, col; |
| 285 | |
| 286 | /* This looks up the original request by tag so we know which |
| 287 | * buffer to read the data into */ |
| 288 | tag++; |
| 289 | |
Eric Van Hensbergen | b85f7d92 | 2011-07-13 19:12:18 -0500 | [diff] [blame] | 290 | if(tag >= c->max_tag) |
| 291 | return NULL; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 292 | |
| 293 | row = tag / P9_ROW_MAXTAG; |
| 294 | col = tag % P9_ROW_MAXTAG; |
| 295 | |
| 296 | return &c->reqs[row][col]; |
| 297 | } |
| 298 | EXPORT_SYMBOL(p9_tag_lookup); |
| 299 | |
| 300 | /** |
| 301 | * p9_tag_init - setup tags structure and contents |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 302 | * @c: v9fs client struct |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 303 | * |
| 304 | * This initializes the tags structure for each client instance. |
| 305 | * |
| 306 | */ |
| 307 | |
| 308 | static int p9_tag_init(struct p9_client *c) |
| 309 | { |
| 310 | int err = 0; |
| 311 | |
| 312 | c->tagpool = p9_idpool_create(); |
| 313 | if (IS_ERR(c->tagpool)) { |
| 314 | err = PTR_ERR(c->tagpool); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 315 | goto error; |
| 316 | } |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 317 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
| 318 | if (err < 0) { |
| 319 | p9_idpool_destroy(c->tagpool); |
| 320 | goto error; |
| 321 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 322 | c->max_tag = 0; |
| 323 | error: |
| 324 | return err; |
| 325 | } |
| 326 | |
| 327 | /** |
| 328 | * p9_tag_cleanup - cleans up tags structure and reclaims resources |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 329 | * @c: v9fs client struct |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 330 | * |
| 331 | * This frees resources associated with the tags structure |
| 332 | * |
| 333 | */ |
| 334 | static void p9_tag_cleanup(struct p9_client *c) |
| 335 | { |
| 336 | int row, col; |
| 337 | |
| 338 | /* check to insure all requests are idle */ |
| 339 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
| 340 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 341 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { |
| 342 | P9_DPRINTK(P9_DEBUG_MUX, |
| 343 | "Attempting to cleanup non-free tag %d,%d\n", |
| 344 | row, col); |
| 345 | /* TODO: delay execution of cleanup */ |
| 346 | return; |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 351 | if (c->tagpool) { |
| 352 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 353 | p9_idpool_destroy(c->tagpool); |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 354 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 355 | |
| 356 | /* free requests associated with tags */ |
| 357 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 358 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 359 | kfree(c->reqs[row][col].wq); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 360 | kfree(c->reqs[row][col].tc); |
| 361 | kfree(c->reqs[row][col].rc); |
| 362 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 363 | kfree(c->reqs[row]); |
| 364 | } |
| 365 | c->max_tag = 0; |
| 366 | } |
| 367 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 368 | /** |
| 369 | * p9_free_req - free a request and clean-up as necessary |
| 370 | * c: client state |
| 371 | * r: request to release |
| 372 | * |
| 373 | */ |
| 374 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 375 | 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] | 376 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 377 | int tag = r->tc->tag; |
| 378 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
| 379 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 380 | r->status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 381 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
| 382 | p9_idpool_put(tag, c->tagpool); |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 383 | } |
| 384 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 385 | /** |
| 386 | * p9_client_cb - call back from transport to client |
| 387 | * c: client state |
| 388 | * req: request received |
| 389 | * |
| 390 | */ |
| 391 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req) |
| 392 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 393 | P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 394 | wake_up(req->wq); |
| 395 | P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 396 | } |
| 397 | EXPORT_SYMBOL(p9_client_cb); |
| 398 | |
| 399 | /** |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 400 | * p9_parse_header - parse header arguments out of a packet |
| 401 | * @pdu: packet to parse |
| 402 | * @size: size of packet |
| 403 | * @type: type of request |
| 404 | * @tag: tag of packet |
| 405 | * @rewind: set if we need to rewind offset afterwards |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 406 | */ |
| 407 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 408 | int |
| 409 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, |
| 410 | int rewind) |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 411 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 412 | int8_t r_type; |
| 413 | int16_t r_tag; |
| 414 | int32_t r_size; |
| 415 | int offset = pdu->offset; |
| 416 | int err; |
| 417 | |
| 418 | pdu->offset = 0; |
| 419 | if (pdu->size == 0) |
| 420 | pdu->size = 7; |
| 421 | |
| 422 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); |
| 423 | if (err) |
| 424 | goto rewind_and_exit; |
| 425 | |
| 426 | pdu->size = r_size; |
| 427 | pdu->id = r_type; |
| 428 | pdu->tag = r_tag; |
| 429 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 430 | P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
| 431 | pdu->id, pdu->tag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 432 | |
| 433 | if (type) |
| 434 | *type = r_type; |
| 435 | if (tag) |
| 436 | *tag = r_tag; |
| 437 | if (size) |
| 438 | *size = r_size; |
| 439 | |
| 440 | |
| 441 | rewind_and_exit: |
| 442 | if (rewind) |
| 443 | pdu->offset = offset; |
| 444 | return err; |
| 445 | } |
| 446 | EXPORT_SYMBOL(p9_parse_header); |
| 447 | |
| 448 | /** |
| 449 | * p9_check_errors - check 9p packet for error return and process it |
| 450 | * @c: current client instance |
| 451 | * @req: request to parse and check for error conditions |
| 452 | * |
| 453 | * returns error code if one is discovered, otherwise returns 0 |
| 454 | * |
| 455 | * this will have to be more complicated if we have multiple |
| 456 | * error packet types |
| 457 | */ |
| 458 | |
| 459 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) |
| 460 | { |
| 461 | int8_t type; |
| 462 | int err; |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 463 | int ecode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 464 | |
| 465 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
| 466 | if (err) { |
| 467 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
| 468 | return err; |
| 469 | } |
| 470 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 471 | if (type != P9_RERROR && type != P9_RLERROR) |
| 472 | return 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 473 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 474 | if (!p9_is_proto_dotl(c)) { |
| 475 | char *ename; |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 476 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 477 | &ename, &ecode); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 478 | if (err) |
| 479 | goto out_err; |
| 480 | |
| 481 | if (p9_is_proto_dotu(c)) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 482 | err = -ecode; |
| 483 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 484 | if (!err || !IS_ERR_VALUE(err)) { |
| 485 | err = p9_errstr2errno(ename, strlen(ename)); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 486 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 487 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
| 488 | -ecode, ename); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 489 | } |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 490 | kfree(ename); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 491 | } else { |
| 492 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| 493 | err = -ecode; |
| 494 | |
| 495 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
| 496 | } |
| 497 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 498 | return err; |
Arun R Bharadwaj | 4f7ebe8 | 2010-07-28 14:17:26 +0530 | [diff] [blame] | 499 | |
| 500 | out_err: |
| 501 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
| 502 | |
| 503 | return err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 504 | } |
| 505 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 506 | /** |
| 507 | * p9_check_zc_errors - check 9p packet for error return and process it |
| 508 | * @c: current client instance |
| 509 | * @req: request to parse and check for error conditions |
| 510 | * @in_hdrlen: Size of response protocol buffer. |
| 511 | * |
| 512 | * returns error code if one is discovered, otherwise returns 0 |
| 513 | * |
| 514 | * this will have to be more complicated if we have multiple |
| 515 | * error packet types |
| 516 | */ |
| 517 | |
| 518 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, |
| 519 | char *uidata, int in_hdrlen, int kern_buf) |
| 520 | { |
| 521 | int err; |
| 522 | int ecode; |
| 523 | int8_t type; |
| 524 | char *ename = NULL; |
| 525 | |
| 526 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
| 527 | if (err) { |
| 528 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
| 529 | return err; |
| 530 | } |
| 531 | |
| 532 | if (type != P9_RERROR && type != P9_RLERROR) |
| 533 | return 0; |
| 534 | |
| 535 | if (!p9_is_proto_dotl(c)) { |
| 536 | /* Error is reported in string format */ |
| 537 | uint16_t len; |
| 538 | /* 7 = header size for RERROR, 2 is the size of string len; */ |
| 539 | int inline_len = in_hdrlen - (7 + 2); |
| 540 | |
| 541 | /* Read the size of error string */ |
| 542 | err = p9pdu_readf(req->rc, c->proto_version, "w", &len); |
| 543 | if (err) |
| 544 | goto out_err; |
| 545 | |
| 546 | ename = kmalloc(len + 1, GFP_NOFS); |
| 547 | if (!ename) { |
| 548 | err = -ENOMEM; |
| 549 | goto out_err; |
| 550 | } |
| 551 | if (len <= inline_len) { |
| 552 | /* We have error in protocol buffer itself */ |
| 553 | if (pdu_read(req->rc, ename, len)) { |
| 554 | err = -EFAULT; |
| 555 | goto out_free; |
| 556 | |
| 557 | } |
| 558 | } else { |
| 559 | /* |
| 560 | * Part of the data is in user space buffer. |
| 561 | */ |
| 562 | if (pdu_read(req->rc, ename, inline_len)) { |
| 563 | err = -EFAULT; |
| 564 | goto out_free; |
| 565 | |
| 566 | } |
| 567 | if (kern_buf) { |
| 568 | memcpy(ename + inline_len, uidata, |
| 569 | len - inline_len); |
| 570 | } else { |
| 571 | err = copy_from_user(ename + inline_len, |
| 572 | uidata, len - inline_len); |
| 573 | if (err) { |
| 574 | err = -EFAULT; |
| 575 | goto out_free; |
| 576 | } |
| 577 | } |
| 578 | } |
| 579 | ename[len] = 0; |
| 580 | if (p9_is_proto_dotu(c)) { |
| 581 | /* For dotu we also have error code */ |
| 582 | err = p9pdu_readf(req->rc, |
| 583 | c->proto_version, "d", &ecode); |
| 584 | if (err) |
| 585 | goto out_free; |
| 586 | err = -ecode; |
| 587 | } |
| 588 | if (!err || !IS_ERR_VALUE(err)) { |
| 589 | err = p9_errstr2errno(ename, strlen(ename)); |
| 590 | |
| 591 | P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
| 592 | -ecode, ename); |
| 593 | } |
| 594 | kfree(ename); |
| 595 | } else { |
| 596 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| 597 | err = -ecode; |
| 598 | |
| 599 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
| 600 | } |
| 601 | return err; |
| 602 | |
| 603 | out_free: |
| 604 | kfree(ename); |
| 605 | out_err: |
| 606 | P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
| 607 | return err; |
| 608 | } |
| 609 | |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 610 | static struct p9_req_t * |
| 611 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); |
| 612 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 613 | /** |
| 614 | * p9_client_flush - flush (cancel) a request |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 615 | * @c: client state |
| 616 | * @oldreq: request to cancel |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 617 | * |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 618 | * This sents a flush for a particular request and links |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 619 | * the flush request to the original request. The current |
| 620 | * code only supports a single flush request although the protocol |
| 621 | * allows for multiple flush requests to be sent for a single request. |
| 622 | * |
| 623 | */ |
| 624 | |
| 625 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) |
| 626 | { |
| 627 | struct p9_req_t *req; |
| 628 | int16_t oldtag; |
| 629 | int err; |
| 630 | |
| 631 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); |
| 632 | if (err) |
| 633 | return err; |
| 634 | |
| 635 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
| 636 | |
| 637 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); |
| 638 | if (IS_ERR(req)) |
| 639 | return PTR_ERR(req); |
| 640 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 641 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 642 | /* if we haven't received a response for oldreq, |
| 643 | remove it from the list. */ |
| 644 | spin_lock(&c->lock); |
| 645 | if (oldreq->status == REQ_STATUS_FLSH) |
| 646 | list_del(&oldreq->req_list); |
| 647 | spin_unlock(&c->lock); |
| 648 | |
| 649 | p9_free_req(c, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 650 | return 0; |
| 651 | } |
| 652 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 653 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
| 654 | int8_t type, int req_size, |
| 655 | const char *fmt, va_list ap) |
| 656 | { |
| 657 | int tag, err; |
| 658 | struct p9_req_t *req; |
| 659 | |
| 660 | P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
| 661 | |
| 662 | /* we allow for any status other than disconnected */ |
| 663 | if (c->status == Disconnected) |
| 664 | return ERR_PTR(-EIO); |
| 665 | |
| 666 | /* if status is begin_disconnected we allow only clunk request */ |
| 667 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) |
| 668 | return ERR_PTR(-EIO); |
| 669 | |
| 670 | tag = P9_NOTAG; |
| 671 | if (type != P9_TVERSION) { |
| 672 | tag = p9_idpool_get(c->tagpool); |
| 673 | if (tag < 0) |
| 674 | return ERR_PTR(-ENOMEM); |
| 675 | } |
| 676 | |
| 677 | req = p9_tag_alloc(c, tag, req_size); |
| 678 | if (IS_ERR(req)) |
| 679 | return req; |
| 680 | |
| 681 | /* marshall the data */ |
| 682 | p9pdu_prepare(req->tc, tag, type); |
| 683 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
| 684 | if (err) |
| 685 | goto reterr; |
| 686 | p9pdu_finalize(req->tc); |
| 687 | return req; |
| 688 | reterr: |
| 689 | p9_free_req(c, req); |
| 690 | return ERR_PTR(err); |
| 691 | } |
| 692 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 693 | /** |
| 694 | * p9_client_rpc - issue a request and wait for a response |
| 695 | * @c: client session |
| 696 | * @type: type of request |
| 697 | * @fmt: protocol format string (see protocol.c) |
| 698 | * |
| 699 | * Returns request structure (which client must free using p9_free_req) |
| 700 | */ |
| 701 | |
| 702 | static struct p9_req_t * |
| 703 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) |
| 704 | { |
| 705 | va_list ap; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 706 | int sigpending, err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 707 | unsigned long flags; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 708 | struct p9_req_t *req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 709 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 710 | va_start(ap, fmt); |
| 711 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); |
| 712 | va_end(ap); |
| 713 | if (IS_ERR(req)) |
| 714 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 715 | |
| 716 | if (signal_pending(current)) { |
| 717 | sigpending = 1; |
| 718 | clear_thread_flag(TIF_SIGPENDING); |
| 719 | } else |
| 720 | sigpending = 0; |
| 721 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 722 | err = c->trans_mod->request(c, req); |
| 723 | if (err < 0) { |
M. Mohan Kumar | 3cd7967 | 2011-04-15 13:59:33 +0530 | [diff] [blame] | 724 | if (err != -ERESTARTSYS && err != -EFAULT) |
Venkateswararao Jujjuri (JV) | 52f44e0 | 2010-09-29 18:33:41 -0700 | [diff] [blame] | 725 | c->status = Disconnected; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 726 | goto reterr; |
| 727 | } |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 728 | /* Wait for the response */ |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 729 | err = wait_event_interruptible(*req->wq, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 730 | req->status >= REQ_STATUS_RCVD); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 731 | |
| 732 | if (req->status == REQ_STATUS_ERROR) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 733 | 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] | 734 | err = req->t_err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 735 | } |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 736 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 737 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 738 | sigpending = 1; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 739 | clear_thread_flag(TIF_SIGPENDING); |
| 740 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 741 | if (c->trans_mod->cancel(c, req)) |
| 742 | p9_client_flush(c, req); |
| 743 | |
| 744 | /* if we received the response anyway, don't signal error */ |
| 745 | if (req->status == REQ_STATUS_RCVD) |
| 746 | err = 0; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 747 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 748 | if (sigpending) { |
| 749 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 750 | recalc_sigpending(); |
| 751 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 752 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 753 | if (err < 0) |
| 754 | goto reterr; |
| 755 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 756 | err = p9_check_errors(c, req); |
| 757 | if (!err) { |
| 758 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); |
| 759 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 760 | } |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 761 | reterr: |
| 762 | P9_DPRINTK(P9_DEBUG_MUX, |
| 763 | "exit: client %p op %d error: %d\n", c, type, err); |
| 764 | p9_free_req(c, req); |
| 765 | return ERR_PTR(err); |
| 766 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 767 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 768 | /** |
| 769 | * p9_client_zc_rpc - issue a request and wait for a response |
| 770 | * @c: client session |
| 771 | * @type: type of request |
| 772 | * @uidata: user bffer that should be ued for zero copy read |
| 773 | * @uodata: user buffer that shoud be user for zero copy write |
| 774 | * @inlen: read buffer size |
| 775 | * @olen: write buffer size |
| 776 | * @hdrlen: reader header size, This is the size of response protocol data |
| 777 | * @fmt: protocol format string (see protocol.c) |
| 778 | * |
| 779 | * Returns request structure (which client must free using p9_free_req) |
| 780 | */ |
| 781 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, |
| 782 | char *uidata, char *uodata, |
| 783 | int inlen, int olen, int in_hdrlen, |
| 784 | int kern_buf, const char *fmt, ...) |
| 785 | { |
| 786 | va_list ap; |
| 787 | int sigpending, err; |
| 788 | unsigned long flags; |
| 789 | struct p9_req_t *req; |
| 790 | |
| 791 | va_start(ap, fmt); |
| 792 | /* |
| 793 | * We allocate a inline protocol data of only 4k bytes. |
| 794 | * The actual content is passed in zero-copy fashion. |
| 795 | */ |
| 796 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); |
| 797 | va_end(ap); |
| 798 | if (IS_ERR(req)) |
| 799 | return req; |
| 800 | |
| 801 | if (signal_pending(current)) { |
| 802 | sigpending = 1; |
| 803 | clear_thread_flag(TIF_SIGPENDING); |
| 804 | } else |
| 805 | sigpending = 0; |
| 806 | |
| 807 | /* If we are called with KERNEL_DS force kern_buf */ |
| 808 | if (segment_eq(get_fs(), KERNEL_DS)) |
| 809 | kern_buf = 1; |
| 810 | |
| 811 | err = c->trans_mod->zc_request(c, req, uidata, uodata, |
| 812 | inlen, olen, in_hdrlen, kern_buf); |
| 813 | if (err < 0) { |
| 814 | if (err == -EIO) |
| 815 | c->status = Disconnected; |
| 816 | goto reterr; |
| 817 | } |
| 818 | if (req->status == REQ_STATUS_ERROR) { |
| 819 | P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
| 820 | err = req->t_err; |
| 821 | } |
| 822 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
| 823 | P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
| 824 | sigpending = 1; |
| 825 | clear_thread_flag(TIF_SIGPENDING); |
| 826 | |
| 827 | if (c->trans_mod->cancel(c, req)) |
| 828 | p9_client_flush(c, req); |
| 829 | |
| 830 | /* if we received the response anyway, don't signal error */ |
| 831 | if (req->status == REQ_STATUS_RCVD) |
| 832 | err = 0; |
| 833 | } |
| 834 | if (sigpending) { |
| 835 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 836 | recalc_sigpending(); |
| 837 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 838 | } |
| 839 | if (err < 0) |
| 840 | goto reterr; |
| 841 | |
| 842 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); |
| 843 | if (!err) { |
| 844 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); |
| 845 | return req; |
| 846 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 847 | reterr: |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 848 | P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
| 849 | err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 850 | p9_free_req(c, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 851 | return ERR_PTR(err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 852 | } |
| 853 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 854 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
| 855 | { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 856 | int ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 857 | struct p9_fid *fid; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 858 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 859 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 860 | P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 861 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
| 862 | if (!fid) |
| 863 | return ERR_PTR(-ENOMEM); |
| 864 | |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 865 | ret = p9_idpool_get(clnt->fidpool); |
Roel Kluin | 24e94de | 2009-01-18 21:32:11 -0800 | [diff] [blame] | 866 | if (ret < 0) { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 867 | ret = -ENOSPC; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 868 | goto error; |
| 869 | } |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 870 | fid->fid = ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 871 | |
| 872 | memset(&fid->qid, 0, sizeof(struct p9_qid)); |
| 873 | fid->mode = -1; |
David Howells | f8b9d53 | 2008-11-14 10:38:44 +1100 | [diff] [blame] | 874 | fid->uid = current_fsuid(); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 875 | fid->clnt = clnt; |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 876 | fid->rdir = NULL; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 877 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 878 | list_add(&fid->flist, &clnt->fidlist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 879 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 880 | |
| 881 | return fid; |
| 882 | |
| 883 | error: |
| 884 | kfree(fid); |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 885 | return ERR_PTR(ret); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 886 | } |
| 887 | |
| 888 | static void p9_fid_destroy(struct p9_fid *fid) |
| 889 | { |
| 890 | struct p9_client *clnt; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 891 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 892 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 893 | P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 894 | clnt = fid->clnt; |
| 895 | p9_idpool_put(fid->fid, clnt->fidpool); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 896 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 897 | list_del(&fid->flist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 898 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 899 | kfree(fid->rdir); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 900 | kfree(fid); |
| 901 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 902 | |
stephen hemminger | 32a875a | 2010-10-19 06:48:16 +0000 | [diff] [blame] | 903 | static int p9_client_version(struct p9_client *c) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 904 | { |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 905 | int err = 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 906 | struct p9_req_t *req; |
| 907 | char *version; |
| 908 | int msize; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 909 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 910 | P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
| 911 | c->msize, c->proto_version); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 912 | |
| 913 | switch (c->proto_version) { |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 914 | case p9_proto_2000L: |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 915 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 916 | c->msize, "9P2000.L"); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 917 | break; |
| 918 | case p9_proto_2000u: |
| 919 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 920 | c->msize, "9P2000.u"); |
| 921 | break; |
| 922 | case p9_proto_legacy: |
| 923 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 924 | c->msize, "9P2000"); |
| 925 | break; |
| 926 | default: |
| 927 | return -EINVAL; |
| 928 | break; |
| 929 | } |
| 930 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 931 | if (IS_ERR(req)) |
| 932 | return PTR_ERR(req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 933 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 934 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 935 | if (err) { |
| 936 | P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 937 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 938 | goto error; |
| 939 | } |
| 940 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 941 | P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 942 | if (!strncmp(version, "9P2000.L", 8)) |
| 943 | c->proto_version = p9_proto_2000L; |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 944 | else if (!strncmp(version, "9P2000.u", 8)) |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 945 | c->proto_version = p9_proto_2000u; |
| 946 | else if (!strncmp(version, "9P2000", 6)) |
| 947 | c->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 948 | else { |
| 949 | err = -EREMOTEIO; |
| 950 | goto error; |
| 951 | } |
| 952 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 953 | if (msize < c->msize) |
| 954 | c->msize = msize; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 955 | |
| 956 | error: |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 957 | kfree(version); |
| 958 | p9_free_req(c, req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 959 | |
| 960 | return err; |
| 961 | } |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 962 | |
| 963 | struct p9_client *p9_client_create(const char *dev_name, char *options) |
| 964 | { |
| 965 | int err; |
| 966 | struct p9_client *clnt; |
| 967 | |
| 968 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 969 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
| 970 | if (!clnt) |
| 971 | return ERR_PTR(-ENOMEM); |
| 972 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 973 | clnt->trans_mod = NULL; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 974 | clnt->trans = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 975 | spin_lock_init(&clnt->lock); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 976 | INIT_LIST_HEAD(&clnt->fidlist); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 977 | |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 978 | err = p9_tag_init(clnt); |
| 979 | if (err < 0) |
| 980 | goto free_client; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 981 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 982 | err = parse_opts(options, clnt); |
| 983 | if (err < 0) |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 984 | goto destroy_tagpool; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 985 | |
Abhishek Kulkarni | a17d172 | 2009-07-14 13:24:10 -0500 | [diff] [blame] | 986 | if (!clnt->trans_mod) |
| 987 | clnt->trans_mod = v9fs_get_default_trans(); |
| 988 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 989 | if (clnt->trans_mod == NULL) { |
| 990 | err = -EPROTONOSUPPORT; |
| 991 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 992 | "No transport defined or default transport\n"); |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 993 | goto destroy_tagpool; |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 994 | } |
| 995 | |
| 996 | clnt->fidpool = p9_idpool_create(); |
| 997 | if (IS_ERR(clnt->fidpool)) { |
| 998 | err = PTR_ERR(clnt->fidpool); |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 999 | goto put_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1000 | } |
| 1001 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1002 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
| 1003 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1004 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1005 | err = clnt->trans_mod->create(clnt, dev_name, options); |
| 1006 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1007 | goto destroy_fidpool; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1008 | |
Venkateswararao Jujjuri (JV) | c9ffb05 | 2011-06-29 18:06:33 -0700 | [diff] [blame] | 1009 | if (clnt->msize > clnt->trans_mod->maxsize) |
| 1010 | clnt->msize = clnt->trans_mod->maxsize; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1011 | |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 1012 | err = p9_client_version(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1013 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1014 | goto close_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1015 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1016 | return clnt; |
| 1017 | |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1018 | close_trans: |
| 1019 | clnt->trans_mod->close(clnt); |
| 1020 | destroy_fidpool: |
| 1021 | p9_idpool_destroy(clnt->fidpool); |
| 1022 | put_trans: |
| 1023 | v9fs_put_trans(clnt->trans_mod); |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 1024 | destroy_tagpool: |
| 1025 | p9_idpool_destroy(clnt->tagpool); |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1026 | free_client: |
| 1027 | kfree(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1028 | return ERR_PTR(err); |
| 1029 | } |
| 1030 | EXPORT_SYMBOL(p9_client_create); |
| 1031 | |
| 1032 | void p9_client_destroy(struct p9_client *clnt) |
| 1033 | { |
| 1034 | struct p9_fid *fid, *fidptr; |
| 1035 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1036 | P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1037 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1038 | if (clnt->trans_mod) |
| 1039 | clnt->trans_mod->close(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1040 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 1041 | v9fs_put_trans(clnt->trans_mod); |
| 1042 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1043 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
| 1044 | printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1045 | p9_fid_destroy(fid); |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1046 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1047 | |
Eric Van Hensbergen | 0af8887 | 2007-07-13 16:47:58 -0500 | [diff] [blame] | 1048 | if (clnt->fidpool) |
| 1049 | p9_idpool_destroy(clnt->fidpool); |
| 1050 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 1051 | p9_tag_cleanup(clnt); |
| 1052 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1053 | kfree(clnt); |
| 1054 | } |
| 1055 | EXPORT_SYMBOL(p9_client_destroy); |
| 1056 | |
| 1057 | void p9_client_disconnect(struct p9_client *clnt) |
| 1058 | { |
| 1059 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1060 | clnt->status = Disconnected; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1061 | } |
| 1062 | EXPORT_SYMBOL(p9_client_disconnect); |
| 1063 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1064 | void p9_client_begin_disconnect(struct p9_client *clnt) |
| 1065 | { |
| 1066 | P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
| 1067 | clnt->status = BeginDisconnect; |
| 1068 | } |
| 1069 | EXPORT_SYMBOL(p9_client_begin_disconnect); |
| 1070 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1071 | 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] | 1072 | char *uname, u32 n_uname, char *aname) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1073 | { |
| 1074 | int err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1075 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1076 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1077 | struct p9_qid qid; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1078 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1079 | P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
| 1080 | afid ? afid->fid : -1, uname, aname); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1081 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1082 | |
| 1083 | fid = p9_fid_create(clnt); |
| 1084 | if (IS_ERR(fid)) { |
| 1085 | err = PTR_ERR(fid); |
| 1086 | fid = NULL; |
| 1087 | goto error; |
| 1088 | } |
| 1089 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1090 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
| 1091 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
| 1092 | if (IS_ERR(req)) { |
| 1093 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1094 | goto error; |
| 1095 | } |
| 1096 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1097 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1098 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1099 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1100 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1101 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1102 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1103 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1104 | P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1105 | qid.type, |
| 1106 | (unsigned long long)qid.path, |
| 1107 | qid.version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1108 | |
| 1109 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); |
| 1110 | |
| 1111 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1112 | return fid; |
| 1113 | |
| 1114 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1115 | if (fid) |
| 1116 | p9_fid_destroy(fid); |
| 1117 | return ERR_PTR(err); |
| 1118 | } |
| 1119 | EXPORT_SYMBOL(p9_client_attach); |
| 1120 | |
Harsh Prateek Bora | b76225e | 2011-03-31 15:49:39 +0530 | [diff] [blame] | 1121 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
| 1122 | char **wnames, int clone) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1123 | { |
| 1124 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1125 | struct p9_client *clnt; |
| 1126 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1127 | struct p9_qid *wqids; |
| 1128 | struct p9_req_t *req; |
Harsh Prateek Bora | b76225e | 2011-03-31 15:49:39 +0530 | [diff] [blame] | 1129 | uint16_t nwqids, count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1130 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1131 | err = 0; |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1132 | wqids = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1133 | clnt = oldfid->clnt; |
| 1134 | if (clone) { |
| 1135 | fid = p9_fid_create(clnt); |
| 1136 | if (IS_ERR(fid)) { |
| 1137 | err = PTR_ERR(fid); |
| 1138 | fid = NULL; |
| 1139 | goto error; |
| 1140 | } |
| 1141 | |
| 1142 | fid->uid = oldfid->uid; |
| 1143 | } else |
| 1144 | fid = oldfid; |
| 1145 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1146 | |
Harsh Prateek Bora | b76225e | 2011-03-31 15:49:39 +0530 | [diff] [blame] | 1147 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1148 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
| 1149 | |
| 1150 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, |
| 1151 | nwname, wnames); |
| 1152 | if (IS_ERR(req)) { |
| 1153 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1154 | goto error; |
| 1155 | } |
| 1156 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1157 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1158 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1159 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1160 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1161 | goto clunk_fid; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1162 | } |
| 1163 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1164 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1165 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
| 1166 | |
| 1167 | if (nwqids != nwname) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1168 | err = -ENOENT; |
| 1169 | goto clunk_fid; |
| 1170 | } |
| 1171 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1172 | for (count = 0; count < nwqids; count++) |
| 1173 | P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1174 | count, wqids[count].type, |
| 1175 | (unsigned long long)wqids[count].path, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1176 | wqids[count].version); |
| 1177 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1178 | if (nwname) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1179 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1180 | else |
| 1181 | fid->qid = oldfid->qid; |
| 1182 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1183 | kfree(wqids); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1184 | return fid; |
| 1185 | |
| 1186 | clunk_fid: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1187 | kfree(wqids); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1188 | p9_client_clunk(fid); |
| 1189 | fid = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1190 | |
| 1191 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1192 | if (fid && (fid != oldfid)) |
| 1193 | p9_fid_destroy(fid); |
| 1194 | |
| 1195 | return ERR_PTR(err); |
| 1196 | } |
| 1197 | EXPORT_SYMBOL(p9_client_walk); |
| 1198 | |
| 1199 | int p9_client_open(struct p9_fid *fid, int mode) |
| 1200 | { |
| 1201 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1202 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1203 | struct p9_req_t *req; |
| 1204 | struct p9_qid qid; |
| 1205 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1206 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1207 | clnt = fid->clnt; |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1208 | P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
| 1209 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
| 1210 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1211 | |
| 1212 | if (fid->mode != -1) |
| 1213 | return -EINVAL; |
| 1214 | |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1215 | if (p9_is_proto_dotl(clnt)) |
| 1216 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); |
| 1217 | else |
| 1218 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1219 | if (IS_ERR(req)) { |
| 1220 | err = PTR_ERR(req); |
| 1221 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1222 | } |
| 1223 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1224 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1225 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1226 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1227 | goto free_and_error; |
| 1228 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1229 | |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1230 | P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
| 1231 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
| 1232 | (unsigned long long)qid.path, qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1233 | |
| 1234 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1235 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1236 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1237 | free_and_error: |
| 1238 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1239 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1240 | return err; |
| 1241 | } |
| 1242 | EXPORT_SYMBOL(p9_client_open); |
| 1243 | |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1244 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
| 1245 | gid_t gid, struct p9_qid *qid) |
| 1246 | { |
| 1247 | int err = 0; |
| 1248 | struct p9_client *clnt; |
| 1249 | struct p9_req_t *req; |
| 1250 | int iounit; |
| 1251 | |
| 1252 | P9_DPRINTK(P9_DEBUG_9P, |
| 1253 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
| 1254 | ofid->fid, name, flags, mode, gid); |
| 1255 | clnt = ofid->clnt; |
| 1256 | |
| 1257 | if (ofid->mode != -1) |
| 1258 | return -EINVAL; |
| 1259 | |
| 1260 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, |
| 1261 | mode, gid); |
| 1262 | if (IS_ERR(req)) { |
| 1263 | err = PTR_ERR(req); |
| 1264 | goto error; |
| 1265 | } |
| 1266 | |
| 1267 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); |
| 1268 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1269 | P9_DUMP_PKT(1, req->rc); |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1270 | goto free_and_error; |
| 1271 | } |
| 1272 | |
| 1273 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
| 1274 | qid->type, |
| 1275 | (unsigned long long)qid->path, |
| 1276 | qid->version, iounit); |
| 1277 | |
| 1278 | ofid->mode = mode; |
| 1279 | ofid->iounit = iounit; |
| 1280 | |
| 1281 | free_and_error: |
| 1282 | p9_free_req(clnt, req); |
| 1283 | error: |
| 1284 | return err; |
| 1285 | } |
| 1286 | EXPORT_SYMBOL(p9_client_create_dotl); |
| 1287 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1288 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
| 1289 | char *extension) |
| 1290 | { |
| 1291 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1292 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1293 | struct p9_req_t *req; |
| 1294 | struct p9_qid qid; |
| 1295 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1296 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1297 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
| 1298 | fid->fid, name, perm, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1299 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1300 | clnt = fid->clnt; |
| 1301 | |
| 1302 | if (fid->mode != -1) |
| 1303 | return -EINVAL; |
| 1304 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1305 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
| 1306 | mode, extension); |
| 1307 | if (IS_ERR(req)) { |
| 1308 | err = PTR_ERR(req); |
| 1309 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1310 | } |
| 1311 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1312 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1313 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1314 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1315 | goto free_and_error; |
| 1316 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1317 | |
| 1318 | 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] | 1319 | qid.type, |
| 1320 | (unsigned long long)qid.path, |
| 1321 | qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1322 | |
| 1323 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1324 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1325 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1326 | free_and_error: |
| 1327 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1328 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1329 | return err; |
| 1330 | } |
| 1331 | EXPORT_SYMBOL(p9_client_fcreate); |
| 1332 | |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1333 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
| 1334 | struct p9_qid *qid) |
| 1335 | { |
| 1336 | int err = 0; |
| 1337 | struct p9_client *clnt; |
| 1338 | struct p9_req_t *req; |
| 1339 | |
| 1340 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
| 1341 | dfid->fid, name, symtgt); |
| 1342 | clnt = dfid->clnt; |
| 1343 | |
| 1344 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, |
| 1345 | gid); |
| 1346 | if (IS_ERR(req)) { |
| 1347 | err = PTR_ERR(req); |
| 1348 | goto error; |
| 1349 | } |
| 1350 | |
| 1351 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 1352 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1353 | P9_DUMP_PKT(1, req->rc); |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1354 | goto free_and_error; |
| 1355 | } |
| 1356 | |
| 1357 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
| 1358 | qid->type, (unsigned long long)qid->path, qid->version); |
| 1359 | |
| 1360 | free_and_error: |
| 1361 | p9_free_req(clnt, req); |
| 1362 | error: |
| 1363 | return err; |
| 1364 | } |
| 1365 | EXPORT_SYMBOL(p9_client_symlink); |
| 1366 | |
Venkateswararao Jujjuri (JV) | 652df9a | 2010-06-03 15:16:59 -0700 | [diff] [blame] | 1367 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
| 1368 | { |
| 1369 | struct p9_client *clnt; |
| 1370 | struct p9_req_t *req; |
| 1371 | |
| 1372 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
| 1373 | dfid->fid, oldfid->fid, newname); |
| 1374 | clnt = dfid->clnt; |
| 1375 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, |
| 1376 | newname); |
| 1377 | if (IS_ERR(req)) |
| 1378 | return PTR_ERR(req); |
| 1379 | |
| 1380 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); |
| 1381 | p9_free_req(clnt, req); |
| 1382 | return 0; |
| 1383 | } |
| 1384 | EXPORT_SYMBOL(p9_client_link); |
| 1385 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1386 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1387 | { |
| 1388 | int err; |
| 1389 | struct p9_client *clnt; |
| 1390 | struct p9_req_t *req; |
| 1391 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1392 | P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
| 1393 | fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1394 | err = 0; |
| 1395 | clnt = fid->clnt; |
| 1396 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1397 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1398 | if (IS_ERR(req)) { |
| 1399 | err = PTR_ERR(req); |
| 1400 | goto error; |
| 1401 | } |
| 1402 | |
| 1403 | P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
| 1404 | |
| 1405 | p9_free_req(clnt, req); |
| 1406 | |
| 1407 | error: |
| 1408 | return err; |
| 1409 | } |
| 1410 | EXPORT_SYMBOL(p9_client_fsync); |
| 1411 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1412 | int p9_client_clunk(struct p9_fid *fid) |
| 1413 | { |
| 1414 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1415 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1416 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1417 | |
jvrao | 8e44a08 | 2010-08-25 16:27:06 +0000 | [diff] [blame] | 1418 | if (!fid) { |
| 1419 | P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); |
| 1420 | dump_stack(); |
| 1421 | return 0; |
| 1422 | } |
| 1423 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1424 | P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1425 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1426 | clnt = fid->clnt; |
| 1427 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1428 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
| 1429 | if (IS_ERR(req)) { |
| 1430 | err = PTR_ERR(req); |
| 1431 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1432 | } |
| 1433 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1434 | P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1435 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1436 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1437 | error: |
Aneesh Kumar K.V | 5034990 | 2011-07-11 16:40:58 +0000 | [diff] [blame] | 1438 | /* |
| 1439 | * Fid is not valid even after a failed clunk |
| 1440 | */ |
| 1441 | p9_fid_destroy(fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1442 | return err; |
| 1443 | } |
| 1444 | EXPORT_SYMBOL(p9_client_clunk); |
| 1445 | |
| 1446 | int p9_client_remove(struct p9_fid *fid) |
| 1447 | { |
| 1448 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1449 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1450 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1451 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1452 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1453 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1454 | clnt = fid->clnt; |
| 1455 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1456 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
| 1457 | if (IS_ERR(req)) { |
| 1458 | err = PTR_ERR(req); |
| 1459 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1460 | } |
| 1461 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1462 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1463 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1464 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1465 | error: |
Aneesh Kumar K.V | 0b1208b | 2010-07-02 12:21:20 +0530 | [diff] [blame] | 1466 | p9_fid_destroy(fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1467 | return err; |
| 1468 | } |
| 1469 | EXPORT_SYMBOL(p9_client_remove); |
| 1470 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 1471 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
| 1472 | { |
| 1473 | int err = 0; |
| 1474 | struct p9_req_t *req; |
| 1475 | struct p9_client *clnt; |
| 1476 | |
| 1477 | P9_DPRINTK(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
| 1478 | dfid->fid, name, flags); |
| 1479 | |
| 1480 | clnt = dfid->clnt; |
| 1481 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); |
| 1482 | if (IS_ERR(req)) { |
| 1483 | err = PTR_ERR(req); |
| 1484 | goto error; |
| 1485 | } |
| 1486 | P9_DPRINTK(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
| 1487 | |
| 1488 | p9_free_req(clnt, req); |
| 1489 | error: |
| 1490 | return err; |
| 1491 | } |
| 1492 | EXPORT_SYMBOL(p9_client_unlinkat); |
| 1493 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1494 | int |
| 1495 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, |
| 1496 | u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1497 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1498 | char *dataptr; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1499 | int kernel_buf = 0; |
| 1500 | struct p9_req_t *req; |
| 1501 | struct p9_client *clnt; |
| 1502 | int err, rsize, non_zc = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1503 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1504 | |
| 1505 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
| 1506 | fid->fid, (long long unsigned) offset, count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1507 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1508 | clnt = fid->clnt; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1509 | |
| 1510 | rsize = fid->iounit; |
| 1511 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1512 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1513 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1514 | if (count < rsize) |
| 1515 | rsize = count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1516 | |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 1517 | /* Don't bother zerocopy for small IO (< 1024) */ |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1518 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 1519 | char *indata; |
| 1520 | if (data) { |
| 1521 | kernel_buf = 1; |
| 1522 | indata = data; |
| 1523 | } else |
| 1524 | indata = (char *)udata; |
| 1525 | /* |
| 1526 | * response header len is 11 |
| 1527 | * PDU Header(7) + IO Size (4) |
| 1528 | */ |
| 1529 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, |
| 1530 | 11, kernel_buf, "dqd", fid->fid, |
| 1531 | offset, rsize); |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1532 | } else { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1533 | non_zc = 1; |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1534 | req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1535 | rsize); |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1536 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1537 | if (IS_ERR(req)) { |
| 1538 | err = PTR_ERR(req); |
| 1539 | goto error; |
| 1540 | } |
| 1541 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1542 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1543 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1544 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1545 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1546 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1547 | |
| 1548 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1549 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1550 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1551 | if (non_zc) { |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1552 | if (data) { |
| 1553 | memmove(data, dataptr, count); |
| 1554 | } else { |
| 1555 | err = copy_to_user(udata, dataptr, count); |
| 1556 | if (err) { |
| 1557 | err = -EFAULT; |
| 1558 | goto free_and_error; |
| 1559 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1560 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1561 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1562 | p9_free_req(clnt, req); |
| 1563 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1564 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1565 | free_and_error: |
| 1566 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1567 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1568 | return err; |
| 1569 | } |
| 1570 | EXPORT_SYMBOL(p9_client_read); |
| 1571 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1572 | int |
| 1573 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
| 1574 | u64 offset, u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1575 | { |
David S. Miller | 095d3da | 2011-04-12 15:58:41 -0700 | [diff] [blame] | 1576 | int err, rsize; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1577 | int kernel_buf = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1578 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1579 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1580 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1581 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
| 1582 | fid->fid, (long long unsigned) offset, count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1583 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1584 | clnt = fid->clnt; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1585 | |
| 1586 | rsize = fid->iounit; |
| 1587 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1588 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1589 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1590 | if (count < rsize) |
| 1591 | rsize = count; |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1592 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1593 | /* Don't bother zerocopy for small IO (< 1024) */ |
| 1594 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 1595 | char *odata; |
| 1596 | if (data) { |
| 1597 | kernel_buf = 1; |
| 1598 | odata = data; |
| 1599 | } else |
| 1600 | odata = (char *)udata; |
| 1601 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, |
| 1602 | P9_ZC_HDR_SZ, kernel_buf, "dqd", |
| 1603 | fid->fid, offset, rsize); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1604 | } else { |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1605 | if (data) |
| 1606 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1607 | offset, rsize, data); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1608 | else |
| 1609 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1610 | offset, rsize, udata); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1611 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1612 | if (IS_ERR(req)) { |
| 1613 | err = PTR_ERR(req); |
| 1614 | goto error; |
| 1615 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1616 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1617 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1618 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1619 | P9_DUMP_PKT(1, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1620 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1621 | } |
| 1622 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1623 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1624 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1625 | p9_free_req(clnt, req); |
| 1626 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1627 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1628 | free_and_error: |
| 1629 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1630 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1631 | return err; |
| 1632 | } |
| 1633 | EXPORT_SYMBOL(p9_client_write); |
| 1634 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1635 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1636 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1637 | int err; |
| 1638 | struct p9_client *clnt; |
| 1639 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); |
| 1640 | struct p9_req_t *req; |
| 1641 | u16 ignored; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1642 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1643 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1644 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1645 | if (!ret) |
| 1646 | return ERR_PTR(-ENOMEM); |
| 1647 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1648 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1649 | clnt = fid->clnt; |
| 1650 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1651 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
| 1652 | if (IS_ERR(req)) { |
| 1653 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1654 | goto error; |
| 1655 | } |
| 1656 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1657 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1658 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1659 | P9_DUMP_PKT(1, req->rc); |
Abhishek Kulkarni | eedfe1c | 2009-07-14 13:25:41 -0500 | [diff] [blame] | 1660 | p9_free_req(clnt, req); |
| 1661 | goto error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1662 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1663 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1664 | P9_DPRINTK(P9_DEBUG_9P, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1665 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1666 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1667 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1668 | "<<< uid=%d gid=%d n_muid=%d\n", |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1669 | ret->size, ret->type, ret->dev, ret->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1670 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
| 1671 | ret->atime, ret->mtime, (unsigned long long)ret->length, |
| 1672 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1673 | ret->n_uid, ret->n_gid, ret->n_muid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1674 | |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1675 | p9_free_req(clnt, req); |
| 1676 | return ret; |
| 1677 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1678 | error: |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1679 | kfree(ret); |
| 1680 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1681 | } |
| 1682 | EXPORT_SYMBOL(p9_client_stat); |
| 1683 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1684 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
| 1685 | u64 request_mask) |
| 1686 | { |
| 1687 | int err; |
| 1688 | struct p9_client *clnt; |
| 1689 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), |
| 1690 | GFP_KERNEL); |
| 1691 | struct p9_req_t *req; |
| 1692 | |
| 1693 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
| 1694 | fid->fid, request_mask); |
| 1695 | |
| 1696 | if (!ret) |
| 1697 | return ERR_PTR(-ENOMEM); |
| 1698 | |
| 1699 | err = 0; |
| 1700 | clnt = fid->clnt; |
| 1701 | |
| 1702 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); |
| 1703 | if (IS_ERR(req)) { |
| 1704 | err = PTR_ERR(req); |
| 1705 | goto error; |
| 1706 | } |
| 1707 | |
| 1708 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); |
| 1709 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1710 | P9_DUMP_PKT(1, req->rc); |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1711 | p9_free_req(clnt, req); |
| 1712 | goto error; |
| 1713 | } |
| 1714 | |
| 1715 | P9_DPRINTK(P9_DEBUG_9P, |
| 1716 | "<<< RGETATTR st_result_mask=%lld\n" |
| 1717 | "<<< qid=%x.%llx.%x\n" |
| 1718 | "<<< st_mode=%8.8x st_nlink=%llu\n" |
| 1719 | "<<< st_uid=%d st_gid=%d\n" |
| 1720 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" |
| 1721 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" |
| 1722 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" |
| 1723 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" |
| 1724 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" |
| 1725 | "<<< st_gen=%lld st_data_version=%lld", |
| 1726 | ret->st_result_mask, ret->qid.type, ret->qid.path, |
| 1727 | ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, |
| 1728 | ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, |
| 1729 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
| 1730 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, |
| 1731 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, |
| 1732 | ret->st_gen, ret->st_data_version); |
| 1733 | |
| 1734 | p9_free_req(clnt, req); |
| 1735 | return ret; |
| 1736 | |
| 1737 | error: |
| 1738 | kfree(ret); |
| 1739 | return ERR_PTR(err); |
| 1740 | } |
| 1741 | EXPORT_SYMBOL(p9_client_getattr_dotl); |
| 1742 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1743 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1744 | { |
| 1745 | int ret; |
| 1746 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1747 | /* NOTE: size shouldn't include its own length */ |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1748 | /* size[2] type[2] dev[4] qid[13] */ |
| 1749 | /* mode[4] atime[4] mtime[4] length[8]*/ |
| 1750 | /* name[s] uid[s] gid[s] muid[s] */ |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1751 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1752 | |
| 1753 | if (wst->name) |
| 1754 | ret += strlen(wst->name); |
| 1755 | if (wst->uid) |
| 1756 | ret += strlen(wst->uid); |
| 1757 | if (wst->gid) |
| 1758 | ret += strlen(wst->gid); |
| 1759 | if (wst->muid) |
| 1760 | ret += strlen(wst->muid); |
| 1761 | |
Sripathi Kodi | c56e4ac | 2010-03-25 12:40:35 +0000 | [diff] [blame] | 1762 | if ((proto_version == p9_proto_2000u) || |
| 1763 | (proto_version == p9_proto_2000L)) { |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1764 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
| 1765 | if (wst->extension) |
| 1766 | ret += strlen(wst->extension); |
| 1767 | } |
| 1768 | |
| 1769 | return ret; |
| 1770 | } |
| 1771 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1772 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
| 1773 | { |
| 1774 | int err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1775 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1776 | struct p9_client *clnt; |
| 1777 | |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1778 | err = 0; |
| 1779 | clnt = fid->clnt; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1780 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1781 | P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1782 | P9_DPRINTK(P9_DEBUG_9P, |
| 1783 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1784 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1785 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1786 | " uid=%d gid=%d n_muid=%d\n", |
| 1787 | wst->size, wst->type, wst->dev, wst->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1788 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
| 1789 | wst->atime, wst->mtime, (unsigned long long)wst->length, |
| 1790 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1791 | wst->n_uid, wst->n_gid, wst->n_muid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1792 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1793 | 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] | 1794 | if (IS_ERR(req)) { |
| 1795 | err = PTR_ERR(req); |
| 1796 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1797 | } |
| 1798 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1799 | P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1800 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1801 | p9_free_req(clnt, req); |
| 1802 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1803 | return err; |
| 1804 | } |
| 1805 | EXPORT_SYMBOL(p9_client_wstat); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1806 | |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1807 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
| 1808 | { |
| 1809 | int err; |
| 1810 | struct p9_req_t *req; |
| 1811 | struct p9_client *clnt; |
| 1812 | |
| 1813 | err = 0; |
| 1814 | clnt = fid->clnt; |
| 1815 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
| 1816 | P9_DPRINTK(P9_DEBUG_9P, |
| 1817 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
| 1818 | " atime_sec=%lld atime_nsec=%lld\n" |
| 1819 | " mtime_sec=%lld mtime_nsec=%lld\n", |
| 1820 | p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, |
| 1821 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
| 1822 | p9attr->mtime_sec, p9attr->mtime_nsec); |
| 1823 | |
| 1824 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); |
| 1825 | |
| 1826 | if (IS_ERR(req)) { |
| 1827 | err = PTR_ERR(req); |
| 1828 | goto error; |
| 1829 | } |
| 1830 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
| 1831 | p9_free_req(clnt, req); |
| 1832 | error: |
| 1833 | return err; |
| 1834 | } |
| 1835 | EXPORT_SYMBOL(p9_client_setattr); |
| 1836 | |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1837 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
| 1838 | { |
| 1839 | int err; |
| 1840 | struct p9_req_t *req; |
| 1841 | struct p9_client *clnt; |
| 1842 | |
| 1843 | err = 0; |
| 1844 | clnt = fid->clnt; |
| 1845 | |
| 1846 | P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
| 1847 | |
| 1848 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); |
| 1849 | if (IS_ERR(req)) { |
| 1850 | err = PTR_ERR(req); |
| 1851 | goto error; |
| 1852 | } |
| 1853 | |
| 1854 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, |
| 1855 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, |
| 1856 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); |
| 1857 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1858 | P9_DUMP_PKT(1, req->rc); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1859 | p9_free_req(clnt, req); |
| 1860 | goto error; |
| 1861 | } |
| 1862 | |
| 1863 | P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
| 1864 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
| 1865 | "fsid %llu namelen %ld\n", |
| 1866 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, |
| 1867 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, |
| 1868 | sb->fsid, (long int)sb->namelen); |
| 1869 | |
| 1870 | p9_free_req(clnt, req); |
| 1871 | error: |
| 1872 | return err; |
| 1873 | } |
| 1874 | EXPORT_SYMBOL(p9_client_statfs); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1875 | |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1876 | int p9_client_rename(struct p9_fid *fid, |
| 1877 | struct p9_fid *newdirfid, const char *name) |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1878 | { |
| 1879 | int err; |
| 1880 | struct p9_req_t *req; |
| 1881 | struct p9_client *clnt; |
| 1882 | |
| 1883 | err = 0; |
| 1884 | clnt = fid->clnt; |
| 1885 | |
| 1886 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
| 1887 | fid->fid, newdirfid->fid, name); |
| 1888 | |
| 1889 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, |
| 1890 | newdirfid->fid, name); |
| 1891 | if (IS_ERR(req)) { |
| 1892 | err = PTR_ERR(req); |
| 1893 | goto error; |
| 1894 | } |
| 1895 | |
| 1896 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
| 1897 | |
| 1898 | p9_free_req(clnt, req); |
| 1899 | error: |
| 1900 | return err; |
| 1901 | } |
| 1902 | EXPORT_SYMBOL(p9_client_rename); |
| 1903 | |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1904 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
| 1905 | struct p9_fid *newdirfid, const char *new_name) |
| 1906 | { |
| 1907 | int err; |
| 1908 | struct p9_req_t *req; |
| 1909 | struct p9_client *clnt; |
| 1910 | |
| 1911 | err = 0; |
| 1912 | clnt = olddirfid->clnt; |
| 1913 | |
| 1914 | P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
| 1915 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
| 1916 | newdirfid->fid, new_name); |
| 1917 | |
| 1918 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, |
| 1919 | old_name, newdirfid->fid, new_name); |
| 1920 | if (IS_ERR(req)) { |
| 1921 | err = PTR_ERR(req); |
| 1922 | goto error; |
| 1923 | } |
| 1924 | |
| 1925 | P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
| 1926 | newdirfid->fid, new_name); |
| 1927 | |
| 1928 | p9_free_req(clnt, req); |
| 1929 | error: |
| 1930 | return err; |
| 1931 | } |
| 1932 | EXPORT_SYMBOL(p9_client_renameat); |
| 1933 | |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 1934 | /* |
| 1935 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace |
| 1936 | */ |
| 1937 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, |
| 1938 | const char *attr_name, u64 *attr_size) |
| 1939 | { |
| 1940 | int err; |
| 1941 | struct p9_req_t *req; |
| 1942 | struct p9_client *clnt; |
| 1943 | struct p9_fid *attr_fid; |
| 1944 | |
| 1945 | err = 0; |
| 1946 | clnt = file_fid->clnt; |
| 1947 | attr_fid = p9_fid_create(clnt); |
| 1948 | if (IS_ERR(attr_fid)) { |
| 1949 | err = PTR_ERR(attr_fid); |
| 1950 | attr_fid = NULL; |
| 1951 | goto error; |
| 1952 | } |
| 1953 | P9_DPRINTK(P9_DEBUG_9P, |
| 1954 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
| 1955 | file_fid->fid, attr_fid->fid, attr_name); |
| 1956 | |
| 1957 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", |
| 1958 | file_fid->fid, attr_fid->fid, attr_name); |
| 1959 | if (IS_ERR(req)) { |
| 1960 | err = PTR_ERR(req); |
| 1961 | goto error; |
| 1962 | } |
| 1963 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); |
| 1964 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 1965 | P9_DUMP_PKT(1, req->rc); |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 1966 | p9_free_req(clnt, req); |
| 1967 | goto clunk_fid; |
| 1968 | } |
| 1969 | p9_free_req(clnt, req); |
| 1970 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
| 1971 | attr_fid->fid, *attr_size); |
| 1972 | return attr_fid; |
| 1973 | clunk_fid: |
| 1974 | p9_client_clunk(attr_fid); |
| 1975 | attr_fid = NULL; |
| 1976 | error: |
| 1977 | if (attr_fid && (attr_fid != file_fid)) |
| 1978 | p9_fid_destroy(attr_fid); |
| 1979 | |
| 1980 | return ERR_PTR(err); |
| 1981 | } |
| 1982 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); |
| 1983 | |
Aneesh Kumar K.V | eda25e46 | 2010-05-31 13:22:50 +0530 | [diff] [blame] | 1984 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
| 1985 | u64 attr_size, int flags) |
| 1986 | { |
| 1987 | int err; |
| 1988 | struct p9_req_t *req; |
| 1989 | struct p9_client *clnt; |
| 1990 | |
| 1991 | P9_DPRINTK(P9_DEBUG_9P, |
| 1992 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
| 1993 | fid->fid, name, (long long)attr_size, flags); |
| 1994 | err = 0; |
| 1995 | clnt = fid->clnt; |
| 1996 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", |
| 1997 | fid->fid, name, attr_size, flags); |
| 1998 | if (IS_ERR(req)) { |
| 1999 | err = PTR_ERR(req); |
| 2000 | goto error; |
| 2001 | } |
| 2002 | P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
| 2003 | p9_free_req(clnt, req); |
| 2004 | error: |
| 2005 | return err; |
| 2006 | } |
| 2007 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); |
| 2008 | |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2009 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
| 2010 | { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2011 | int err, rsize, non_zc = 0; |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2012 | struct p9_client *clnt; |
| 2013 | struct p9_req_t *req; |
| 2014 | char *dataptr; |
| 2015 | |
| 2016 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
| 2017 | fid->fid, (long long unsigned) offset, count); |
| 2018 | |
| 2019 | err = 0; |
| 2020 | clnt = fid->clnt; |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2021 | |
| 2022 | rsize = fid->iounit; |
| 2023 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) |
| 2024 | rsize = clnt->msize - P9_READDIRHDRSZ; |
| 2025 | |
| 2026 | if (count < rsize) |
| 2027 | rsize = count; |
| 2028 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2029 | /* Don't bother zerocopy for small IO (< 1024) */ |
| 2030 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 2031 | /* |
| 2032 | * response header len is 11 |
| 2033 | * PDU Header(7) + IO Size (4) |
| 2034 | */ |
| 2035 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, |
| 2036 | 11, 1, "dqd", fid->fid, offset, rsize); |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2037 | } else { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2038 | non_zc = 1; |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2039 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2040 | offset, rsize); |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2041 | } |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2042 | if (IS_ERR(req)) { |
| 2043 | err = PTR_ERR(req); |
| 2044 | goto error; |
| 2045 | } |
| 2046 | |
| 2047 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
| 2048 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2049 | P9_DUMP_PKT(1, req->rc); |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2050 | goto free_and_error; |
| 2051 | } |
| 2052 | |
| 2053 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
| 2054 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2055 | if (non_zc) |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2056 | memmove(data, dataptr, count); |
| 2057 | |
| 2058 | p9_free_req(clnt, req); |
| 2059 | return count; |
| 2060 | |
| 2061 | free_and_error: |
| 2062 | p9_free_req(clnt, req); |
| 2063 | error: |
| 2064 | return err; |
| 2065 | } |
| 2066 | EXPORT_SYMBOL(p9_client_readdir); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2067 | |
| 2068 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, |
| 2069 | dev_t rdev, gid_t gid, struct p9_qid *qid) |
| 2070 | { |
| 2071 | int err; |
| 2072 | struct p9_client *clnt; |
| 2073 | struct p9_req_t *req; |
| 2074 | |
| 2075 | err = 0; |
| 2076 | clnt = fid->clnt; |
| 2077 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
| 2078 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
| 2079 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, |
| 2080 | MAJOR(rdev), MINOR(rdev), gid); |
| 2081 | if (IS_ERR(req)) |
| 2082 | return PTR_ERR(req); |
| 2083 | |
| 2084 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 2085 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2086 | P9_DUMP_PKT(1, req->rc); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2087 | goto error; |
| 2088 | } |
| 2089 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
| 2090 | (unsigned long long)qid->path, qid->version); |
| 2091 | |
| 2092 | error: |
| 2093 | p9_free_req(clnt, req); |
| 2094 | return err; |
| 2095 | |
| 2096 | } |
| 2097 | EXPORT_SYMBOL(p9_client_mknod_dotl); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2098 | |
| 2099 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, |
| 2100 | gid_t gid, struct p9_qid *qid) |
| 2101 | { |
| 2102 | int err; |
| 2103 | struct p9_client *clnt; |
| 2104 | struct p9_req_t *req; |
| 2105 | |
| 2106 | err = 0; |
| 2107 | clnt = fid->clnt; |
| 2108 | P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
| 2109 | fid->fid, name, mode, gid); |
| 2110 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, |
| 2111 | gid); |
| 2112 | if (IS_ERR(req)) |
| 2113 | return PTR_ERR(req); |
| 2114 | |
| 2115 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 2116 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2117 | P9_DUMP_PKT(1, req->rc); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2118 | goto error; |
| 2119 | } |
| 2120 | P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
| 2121 | (unsigned long long)qid->path, qid->version); |
| 2122 | |
| 2123 | error: |
| 2124 | p9_free_req(clnt, req); |
| 2125 | return err; |
| 2126 | |
| 2127 | } |
| 2128 | EXPORT_SYMBOL(p9_client_mkdir_dotl); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2129 | |
| 2130 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) |
| 2131 | { |
| 2132 | int err; |
| 2133 | struct p9_client *clnt; |
| 2134 | struct p9_req_t *req; |
| 2135 | |
| 2136 | err = 0; |
| 2137 | clnt = fid->clnt; |
| 2138 | P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
| 2139 | "start %lld length %lld proc_id %d client_id %s\n", |
| 2140 | fid->fid, flock->type, flock->flags, flock->start, |
| 2141 | flock->length, flock->proc_id, flock->client_id); |
| 2142 | |
| 2143 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, |
| 2144 | flock->flags, flock->start, flock->length, |
| 2145 | flock->proc_id, flock->client_id); |
| 2146 | |
| 2147 | if (IS_ERR(req)) |
| 2148 | return PTR_ERR(req); |
| 2149 | |
| 2150 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); |
| 2151 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2152 | P9_DUMP_PKT(1, req->rc); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2153 | goto error; |
| 2154 | } |
| 2155 | P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
| 2156 | error: |
| 2157 | p9_free_req(clnt, req); |
| 2158 | return err; |
| 2159 | |
| 2160 | } |
| 2161 | EXPORT_SYMBOL(p9_client_lock_dotl); |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2162 | |
| 2163 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) |
| 2164 | { |
| 2165 | int err; |
| 2166 | struct p9_client *clnt; |
| 2167 | struct p9_req_t *req; |
| 2168 | |
| 2169 | err = 0; |
| 2170 | clnt = fid->clnt; |
| 2171 | P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
| 2172 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
| 2173 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 2174 | |
| 2175 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, |
| 2176 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 2177 | |
| 2178 | if (IS_ERR(req)) |
| 2179 | return PTR_ERR(req); |
| 2180 | |
| 2181 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, |
| 2182 | &glock->start, &glock->length, &glock->proc_id, |
| 2183 | &glock->client_id); |
| 2184 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2185 | P9_DUMP_PKT(1, req->rc); |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2186 | goto error; |
| 2187 | } |
| 2188 | P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
| 2189 | "proc_id %d client_id %s\n", glock->type, glock->start, |
| 2190 | glock->length, glock->proc_id, glock->client_id); |
| 2191 | error: |
| 2192 | p9_free_req(clnt, req); |
| 2193 | return err; |
| 2194 | } |
| 2195 | EXPORT_SYMBOL(p9_client_getlock_dotl); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2196 | |
| 2197 | int p9_client_readlink(struct p9_fid *fid, char **target) |
| 2198 | { |
| 2199 | int err; |
| 2200 | struct p9_client *clnt; |
| 2201 | struct p9_req_t *req; |
| 2202 | |
| 2203 | err = 0; |
| 2204 | clnt = fid->clnt; |
| 2205 | P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
| 2206 | |
| 2207 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); |
| 2208 | if (IS_ERR(req)) |
| 2209 | return PTR_ERR(req); |
| 2210 | |
| 2211 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); |
| 2212 | if (err) { |
Eric Van Hensbergen | e660a82 | 2011-06-19 16:38:21 -0500 | [diff] [blame] | 2213 | P9_DUMP_PKT(1, req->rc); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2214 | goto error; |
| 2215 | } |
| 2216 | P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
| 2217 | error: |
| 2218 | p9_free_req(clnt, req); |
| 2219 | return err; |
| 2220 | } |
| 2221 | EXPORT_SYMBOL(p9_client_readlink); |