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 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 27 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/errno.h> |
| 30 | #include <linux/fs.h> |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 31 | #include <linux/poll.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 32 | #include <linux/idr.h> |
| 33 | #include <linux/mutex.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 34 | #include <linux/slab.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 35 | #include <linux/sched.h> |
| 36 | #include <linux/uaccess.h> |
| 37 | #include <net/9p/9p.h> |
Eric Van Hensbergen | fb0466c | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 38 | #include <linux/parser.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 39 | #include <net/9p/client.h> |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 40 | #include <net/9p/transport.h> |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 41 | #include "protocol.h" |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 42 | |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 43 | #define CREATE_TRACE_POINTS |
| 44 | #include <trace/events/9p.h> |
| 45 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 46 | /* |
| 47 | * Client Option Parsing (code inspired by NFS code) |
| 48 | * - a little lazy - parse all client options |
| 49 | */ |
| 50 | |
| 51 | enum { |
| 52 | Opt_msize, |
| 53 | Opt_trans, |
| 54 | Opt_legacy, |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 55 | Opt_version, |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 56 | Opt_err, |
| 57 | }; |
| 58 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 59 | static const match_table_t tokens = { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 60 | {Opt_msize, "msize=%u"}, |
| 61 | {Opt_legacy, "noextend"}, |
| 62 | {Opt_trans, "trans=%s"}, |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 63 | {Opt_version, "version=%s"}, |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 64 | {Opt_err, NULL}, |
| 65 | }; |
| 66 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 67 | inline int p9_is_proto_dotl(struct p9_client *clnt) |
| 68 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 69 | return clnt->proto_version == p9_proto_2000L; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 70 | } |
| 71 | EXPORT_SYMBOL(p9_is_proto_dotl); |
| 72 | |
| 73 | inline int p9_is_proto_dotu(struct p9_client *clnt) |
| 74 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 75 | return clnt->proto_version == p9_proto_2000u; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 76 | } |
| 77 | EXPORT_SYMBOL(p9_is_proto_dotu); |
| 78 | |
Simon Derr | 43def35 | 2012-08-10 15:52:06 +0200 | [diff] [blame] | 79 | /* |
| 80 | * Some error codes are taken directly from the server replies, |
| 81 | * make sure they are valid. |
| 82 | */ |
| 83 | static int safe_errno(int err) |
| 84 | { |
| 85 | if ((err > 0) || (err < -MAX_ERRNO)) { |
| 86 | p9_debug(P9_DEBUG_ERROR, "Invalid error code %d\n", err); |
| 87 | return -EPROTO; |
| 88 | } |
| 89 | return err; |
| 90 | } |
| 91 | |
| 92 | |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 93 | /* Interpret mount option for protocol version */ |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 94 | static int get_protocol_version(char *s) |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 95 | { |
Dan Carpenter | 3dc9fef | 2010-04-05 14:37:28 -0500 | [diff] [blame] | 96 | int version = -EINVAL; |
| 97 | |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 98 | if (!strcmp(s, "9p2000")) { |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 99 | version = p9_proto_legacy; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 100 | p9_debug(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 101 | } else if (!strcmp(s, "9p2000.u")) { |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 102 | version = p9_proto_2000u; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 103 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 104 | } else if (!strcmp(s, "9p2000.L")) { |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 105 | version = p9_proto_2000L; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 106 | p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 107 | } else |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 108 | pr_info("Unknown protocol version %s\n", s); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 109 | |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 110 | return version; |
| 111 | } |
| 112 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 113 | /** |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 114 | * parse_options - parse mount options into client structure |
| 115 | * @opts: options string passed from mount |
| 116 | * @clnt: existing v9fs client information |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 117 | * |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 118 | * Return 0 upon success, -ERRNO upon failure |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 119 | */ |
| 120 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 121 | static int parse_opts(char *opts, struct p9_client *clnt) |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 122 | { |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 123 | char *options, *tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 124 | char *p; |
| 125 | substring_t args[MAX_OPT_ARGS]; |
| 126 | int option; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 127 | char *s; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 128 | int ret = 0; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 129 | |
Aneesh Kumar K.V | 095e799 | 2013-05-20 12:20:54 +0530 | [diff] [blame] | 130 | clnt->proto_version = p9_proto_2000L; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 131 | clnt->msize = 8192; |
| 132 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 133 | if (!opts) |
| 134 | return 0; |
| 135 | |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 136 | tmp_options = kstrdup(opts, GFP_KERNEL); |
| 137 | if (!tmp_options) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 138 | p9_debug(P9_DEBUG_ERROR, |
| 139 | "failed to allocate copy of option string\n"); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 140 | return -ENOMEM; |
| 141 | } |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 142 | options = tmp_options; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 143 | |
| 144 | while ((p = strsep(&options, ",")) != NULL) { |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 145 | int token, r; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 146 | if (!*p) |
| 147 | continue; |
| 148 | token = match_token(p, tokens, args); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 149 | switch (token) { |
| 150 | case Opt_msize: |
| 151 | r = match_int(&args[0], &option); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 152 | if (r < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 153 | p9_debug(P9_DEBUG_ERROR, |
| 154 | "integer field, but no integer?\n"); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 155 | ret = r; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 156 | continue; |
| 157 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 158 | clnt->msize = option; |
| 159 | break; |
| 160 | case Opt_trans: |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 161 | s = match_strdup(&args[0]); |
| 162 | if (!s) { |
| 163 | ret = -ENOMEM; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 164 | p9_debug(P9_DEBUG_ERROR, |
| 165 | "problem allocating copy of trans arg\n"); |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 166 | goto free_and_return; |
| 167 | } |
| 168 | clnt->trans_mod = v9fs_get_trans_by_name(s); |
| 169 | if (clnt->trans_mod == NULL) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 170 | pr_info("Could not find request transport: %s\n", |
| 171 | s); |
Eric Van Hensbergen | 349d3bb8 | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 172 | ret = -EINVAL; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 173 | kfree(s); |
Eric Van Hensbergen | 349d3bb8 | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 174 | goto free_and_return; |
| 175 | } |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 176 | kfree(s); |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 177 | break; |
| 178 | case Opt_legacy: |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 179 | clnt->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 180 | break; |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 181 | case Opt_version: |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 182 | s = match_strdup(&args[0]); |
| 183 | if (!s) { |
| 184 | ret = -ENOMEM; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 185 | p9_debug(P9_DEBUG_ERROR, |
| 186 | "problem allocating copy of version arg\n"); |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 187 | goto free_and_return; |
Prem Karat | 4d63055 | 2011-05-06 18:35:32 +0530 | [diff] [blame] | 188 | } |
| 189 | ret = get_protocol_version(s); |
| 190 | if (ret == -EINVAL) { |
| 191 | kfree(s); |
| 192 | goto free_and_return; |
| 193 | } |
| 194 | kfree(s); |
Sripathi Kodi | 0fb80ab | 2010-03-05 18:49:11 +0000 | [diff] [blame] | 195 | clnt->proto_version = ret; |
| 196 | break; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 197 | default: |
| 198 | continue; |
| 199 | } |
| 200 | } |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 201 | |
Eric Van Hensbergen | 349d3bb8 | 2010-01-15 19:01:10 -0600 | [diff] [blame] | 202 | free_and_return: |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 203 | kfree(tmp_options); |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 204 | return ret; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 205 | } |
| 206 | |
Rashika | 05a782d | 2014-02-09 19:57:33 +0530 | [diff] [blame] | 207 | static struct p9_fcall *p9_fcall_alloc(int alloc_msize) |
Simon Derr | 5387320 | 2013-06-21 15:32:36 +0200 | [diff] [blame] | 208 | { |
| 209 | struct p9_fcall *fc; |
| 210 | fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS); |
| 211 | if (!fc) |
| 212 | return NULL; |
| 213 | fc->capacity = alloc_msize; |
| 214 | fc->sdata = (char *) fc + sizeof(struct p9_fcall); |
| 215 | return fc; |
| 216 | } |
| 217 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 218 | /** |
| 219 | * p9_tag_alloc - lookup/allocate a request by tag |
| 220 | * @c: client session to lookup tag within |
| 221 | * @tag: numeric id for transaction |
| 222 | * |
| 223 | * this is a simple array lookup, but will grow the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 224 | * request_slots as necessary to accommodate transaction |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 225 | * ids which did not previously have a slot. |
| 226 | * |
| 227 | * this code relies on the client spinlock to manage locks, its |
| 228 | * possible we should switch to something else, but I'd rather |
| 229 | * stick with something low-overhead for the common case. |
| 230 | * |
| 231 | */ |
| 232 | |
Dan Carpenter | ef6b080 | 2011-08-26 19:57:40 +0300 | [diff] [blame] | 233 | static struct p9_req_t * |
| 234 | p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 235 | { |
| 236 | unsigned long flags; |
| 237 | int row, col; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 238 | struct p9_req_t *req; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 239 | int alloc_msize = min(c->msize, max_size); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 240 | |
| 241 | /* This looks up the original request by tag so we know which |
| 242 | * buffer to read the data into */ |
| 243 | tag++; |
| 244 | |
| 245 | if (tag >= c->max_tag) { |
| 246 | spin_lock_irqsave(&c->lock, flags); |
| 247 | /* check again since original check was outside of lock */ |
| 248 | while (tag >= c->max_tag) { |
| 249 | row = (tag / P9_ROW_MAXTAG); |
| 250 | c->reqs[row] = kcalloc(P9_ROW_MAXTAG, |
| 251 | sizeof(struct p9_req_t), GFP_ATOMIC); |
| 252 | |
| 253 | if (!c->reqs[row]) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 254 | pr_err("Couldn't grow tag array\n"); |
Eric Van Hensbergen | e45c540 | 2008-10-22 18:54:47 -0500 | [diff] [blame] | 255 | spin_unlock_irqrestore(&c->lock, flags); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 256 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 257 | } |
| 258 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 259 | c->reqs[row][col].status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 260 | c->reqs[row][col].tc = NULL; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 261 | } |
| 262 | c->max_tag += P9_ROW_MAXTAG; |
| 263 | } |
| 264 | spin_unlock_irqrestore(&c->lock, flags); |
| 265 | } |
| 266 | row = tag / P9_ROW_MAXTAG; |
| 267 | col = tag % P9_ROW_MAXTAG; |
| 268 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 269 | req = &c->reqs[row][col]; |
Simon Derr | 5387320 | 2013-06-21 15:32:36 +0200 | [diff] [blame] | 270 | if (!req->wq) { |
Aneesh Kumar K.V | eeff66e | 2011-03-08 16:39:47 +0530 | [diff] [blame] | 271 | req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
Simon Derr | ea071aa | 2013-06-21 15:32:34 +0200 | [diff] [blame] | 272 | if (!req->wq) |
| 273 | goto grow_failed; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 274 | init_waitqueue_head(req->wq); |
Simon Derr | ea071aa | 2013-06-21 15:32:34 +0200 | [diff] [blame] | 275 | } |
Simon Derr | ea071aa | 2013-06-21 15:32:34 +0200 | [diff] [blame] | 276 | |
Simon Derr | 5387320 | 2013-06-21 15:32:36 +0200 | [diff] [blame] | 277 | if (!req->tc) |
| 278 | req->tc = p9_fcall_alloc(alloc_msize); |
| 279 | if (!req->rc) |
| 280 | req->rc = p9_fcall_alloc(alloc_msize); |
| 281 | if (!req->tc || !req->rc) |
| 282 | goto grow_failed; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 283 | |
| 284 | p9pdu_reset(req->tc); |
| 285 | p9pdu_reset(req->rc); |
| 286 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 287 | req->tc->tag = tag-1; |
| 288 | req->status = REQ_STATUS_ALLOC; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 289 | |
Simon Derr | ea071aa | 2013-06-21 15:32:34 +0200 | [diff] [blame] | 290 | return req; |
| 291 | |
| 292 | grow_failed: |
| 293 | pr_err("Couldn't grow tag array\n"); |
| 294 | kfree(req->tc); |
| 295 | kfree(req->rc); |
| 296 | kfree(req->wq); |
| 297 | req->tc = req->rc = NULL; |
| 298 | req->wq = NULL; |
| 299 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 300 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 301 | |
| 302 | /** |
| 303 | * p9_tag_lookup - lookup a request by tag |
| 304 | * @c: client session to lookup tag within |
| 305 | * @tag: numeric id for transaction |
| 306 | * |
| 307 | */ |
| 308 | |
| 309 | struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) |
| 310 | { |
| 311 | int row, col; |
| 312 | |
| 313 | /* This looks up the original request by tag so we know which |
| 314 | * buffer to read the data into */ |
| 315 | tag++; |
| 316 | |
Eric Van Hensbergen | b85f7d92 | 2011-07-13 19:12:18 -0500 | [diff] [blame] | 317 | if(tag >= c->max_tag) |
| 318 | return NULL; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 319 | |
| 320 | row = tag / P9_ROW_MAXTAG; |
| 321 | col = tag % P9_ROW_MAXTAG; |
| 322 | |
| 323 | return &c->reqs[row][col]; |
| 324 | } |
| 325 | EXPORT_SYMBOL(p9_tag_lookup); |
| 326 | |
| 327 | /** |
| 328 | * p9_tag_init - setup tags structure and contents |
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 initializes the tags structure for each client instance. |
| 332 | * |
| 333 | */ |
| 334 | |
| 335 | static int p9_tag_init(struct p9_client *c) |
| 336 | { |
| 337 | int err = 0; |
| 338 | |
| 339 | c->tagpool = p9_idpool_create(); |
| 340 | if (IS_ERR(c->tagpool)) { |
| 341 | err = PTR_ERR(c->tagpool); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 342 | goto error; |
| 343 | } |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 344 | err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
| 345 | if (err < 0) { |
| 346 | p9_idpool_destroy(c->tagpool); |
| 347 | goto error; |
| 348 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 349 | c->max_tag = 0; |
| 350 | error: |
| 351 | return err; |
| 352 | } |
| 353 | |
| 354 | /** |
| 355 | * p9_tag_cleanup - cleans up tags structure and reclaims resources |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 356 | * @c: v9fs client struct |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 357 | * |
| 358 | * This frees resources associated with the tags structure |
| 359 | * |
| 360 | */ |
| 361 | static void p9_tag_cleanup(struct p9_client *c) |
| 362 | { |
| 363 | int row, col; |
| 364 | |
| 365 | /* check to insure all requests are idle */ |
| 366 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
| 367 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| 368 | if (c->reqs[row][col].status != REQ_STATUS_IDLE) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 369 | p9_debug(P9_DEBUG_MUX, |
| 370 | "Attempting to cleanup non-free tag %d,%d\n", |
| 371 | row, col); |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 372 | /* TODO: delay execution of cleanup */ |
| 373 | return; |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 378 | if (c->tagpool) { |
| 379 | p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 380 | p9_idpool_destroy(c->tagpool); |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 381 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 382 | |
| 383 | /* free requests associated with tags */ |
| 384 | for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 385 | for (col = 0; col < P9_ROW_MAXTAG; col++) { |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 386 | kfree(c->reqs[row][col].wq); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 387 | kfree(c->reqs[row][col].tc); |
| 388 | kfree(c->reqs[row][col].rc); |
| 389 | } |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 390 | kfree(c->reqs[row]); |
| 391 | } |
| 392 | c->max_tag = 0; |
| 393 | } |
| 394 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 395 | /** |
| 396 | * p9_free_req - free a request and clean-up as necessary |
| 397 | * c: client state |
| 398 | * r: request to release |
| 399 | * |
| 400 | */ |
| 401 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 402 | 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] | 403 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 404 | int tag = r->tc->tag; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 405 | p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 406 | |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 407 | r->status = REQ_STATUS_IDLE; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 408 | if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
| 409 | p9_idpool_put(tag, c->tagpool); |
Eric Van Hensbergen | 673d62cd | 2008-10-13 18:45:22 -0500 | [diff] [blame] | 410 | } |
| 411 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 412 | /** |
| 413 | * p9_client_cb - call back from transport to client |
| 414 | * c: client state |
| 415 | * req: request received |
| 416 | * |
| 417 | */ |
Dominique Martinet | 2b6e72e | 2014-01-17 18:31:00 +0100 | [diff] [blame] | 418 | void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status) |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 419 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 420 | p9_debug(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
Dominique Martinet | 2b6e72e | 2014-01-17 18:31:00 +0100 | [diff] [blame] | 421 | |
| 422 | /* |
| 423 | * This barrier is needed to make sure any change made to req before |
| 424 | * the other thread wakes up will indeed be seen by the waiting side. |
| 425 | */ |
| 426 | smp_wmb(); |
| 427 | req->status = status; |
| 428 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 429 | wake_up(req->wq); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 430 | p9_debug(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 431 | } |
| 432 | EXPORT_SYMBOL(p9_client_cb); |
| 433 | |
| 434 | /** |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 435 | * p9_parse_header - parse header arguments out of a packet |
| 436 | * @pdu: packet to parse |
| 437 | * @size: size of packet |
| 438 | * @type: type of request |
| 439 | * @tag: tag of packet |
| 440 | * @rewind: set if we need to rewind offset afterwards |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 441 | */ |
| 442 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 443 | int |
| 444 | p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, |
| 445 | int rewind) |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 446 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 447 | int8_t r_type; |
| 448 | int16_t r_tag; |
| 449 | int32_t r_size; |
| 450 | int offset = pdu->offset; |
| 451 | int err; |
| 452 | |
| 453 | pdu->offset = 0; |
| 454 | if (pdu->size == 0) |
| 455 | pdu->size = 7; |
| 456 | |
| 457 | err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); |
| 458 | if (err) |
| 459 | goto rewind_and_exit; |
| 460 | |
| 461 | pdu->size = r_size; |
| 462 | pdu->id = r_type; |
| 463 | pdu->tag = r_tag; |
| 464 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 465 | p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", |
| 466 | pdu->size, pdu->id, pdu->tag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 467 | |
| 468 | if (type) |
| 469 | *type = r_type; |
| 470 | if (tag) |
| 471 | *tag = r_tag; |
| 472 | if (size) |
| 473 | *size = r_size; |
| 474 | |
| 475 | |
| 476 | rewind_and_exit: |
| 477 | if (rewind) |
| 478 | pdu->offset = offset; |
| 479 | return err; |
| 480 | } |
| 481 | EXPORT_SYMBOL(p9_parse_header); |
| 482 | |
| 483 | /** |
| 484 | * p9_check_errors - check 9p packet for error return and process it |
| 485 | * @c: current client instance |
| 486 | * @req: request to parse and check for error conditions |
| 487 | * |
| 488 | * returns error code if one is discovered, otherwise returns 0 |
| 489 | * |
| 490 | * this will have to be more complicated if we have multiple |
| 491 | * error packet types |
| 492 | */ |
| 493 | |
| 494 | static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) |
| 495 | { |
| 496 | int8_t type; |
| 497 | int err; |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 498 | int ecode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 499 | |
| 500 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 501 | /* |
| 502 | * dump the response from server |
| 503 | * This should be after check errors which poplulate pdu_fcall. |
| 504 | */ |
| 505 | trace_9p_protocol_dump(c, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 506 | if (err) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 507 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 508 | return err; |
| 509 | } |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 510 | if (type != P9_RERROR && type != P9_RLERROR) |
| 511 | return 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 512 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 513 | if (!p9_is_proto_dotl(c)) { |
| 514 | char *ename; |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 515 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 516 | &ename, &ecode); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 517 | if (err) |
| 518 | goto out_err; |
| 519 | |
| 520 | if (p9_is_proto_dotu(c)) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 521 | err = -ecode; |
| 522 | |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 523 | if (!err || !IS_ERR_VALUE(err)) { |
| 524 | err = p9_errstr2errno(ename, strlen(ename)); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 525 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 526 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
| 527 | -ecode, ename); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 528 | } |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 529 | kfree(ename); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 530 | } else { |
| 531 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| 532 | err = -ecode; |
| 533 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 534 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
Venkateswararao Jujjuri (JV) | ca41bb3 | 2011-02-01 20:04:59 -0800 | [diff] [blame] | 535 | } |
| 536 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 537 | return err; |
Arun R Bharadwaj | 4f7ebe8 | 2010-07-28 14:17:26 +0530 | [diff] [blame] | 538 | |
| 539 | out_err: |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 540 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
Arun R Bharadwaj | 4f7ebe8 | 2010-07-28 14:17:26 +0530 | [diff] [blame] | 541 | |
| 542 | return err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 543 | } |
| 544 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 545 | /** |
| 546 | * p9_check_zc_errors - check 9p packet for error return and process it |
| 547 | * @c: current client instance |
| 548 | * @req: request to parse and check for error conditions |
| 549 | * @in_hdrlen: Size of response protocol buffer. |
| 550 | * |
| 551 | * returns error code if one is discovered, otherwise returns 0 |
| 552 | * |
| 553 | * this will have to be more complicated if we have multiple |
| 554 | * error packet types |
| 555 | */ |
| 556 | |
| 557 | static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, |
| 558 | char *uidata, int in_hdrlen, int kern_buf) |
| 559 | { |
| 560 | int err; |
| 561 | int ecode; |
| 562 | int8_t type; |
| 563 | char *ename = NULL; |
| 564 | |
| 565 | err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 566 | /* |
| 567 | * dump the response from server |
| 568 | * This should be after parse_header which poplulate pdu_fcall. |
| 569 | */ |
| 570 | trace_9p_protocol_dump(c, req->rc); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 571 | if (err) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 572 | p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 573 | return err; |
| 574 | } |
| 575 | |
| 576 | if (type != P9_RERROR && type != P9_RLERROR) |
| 577 | return 0; |
| 578 | |
| 579 | if (!p9_is_proto_dotl(c)) { |
| 580 | /* Error is reported in string format */ |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 581 | int len; |
| 582 | /* 7 = header size for RERROR; */ |
| 583 | int inline_len = in_hdrlen - 7; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 584 | |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 585 | len = req->rc->size - req->rc->offset; |
| 586 | if (len > (P9_ZC_HDR_SZ - 7)) { |
| 587 | err = -EFAULT; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 588 | goto out_err; |
| 589 | } |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 590 | |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 591 | ename = &req->rc->sdata[req->rc->offset]; |
| 592 | if (len > inline_len) { |
| 593 | /* We have error in external buffer */ |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 594 | if (kern_buf) { |
| 595 | memcpy(ename + inline_len, uidata, |
| 596 | len - inline_len); |
| 597 | } else { |
| 598 | err = copy_from_user(ename + inline_len, |
| 599 | uidata, len - inline_len); |
| 600 | if (err) { |
| 601 | err = -EFAULT; |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 602 | goto out_err; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 603 | } |
| 604 | } |
| 605 | } |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 606 | ename = NULL; |
| 607 | err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
| 608 | &ename, &ecode); |
| 609 | if (err) |
| 610 | goto out_err; |
| 611 | |
| 612 | if (p9_is_proto_dotu(c)) |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 613 | err = -ecode; |
Aneesh Kumar K.V | 42fe648 | 2013-05-20 23:05:15 +0530 | [diff] [blame] | 614 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 615 | if (!err || !IS_ERR_VALUE(err)) { |
| 616 | err = p9_errstr2errno(ename, strlen(ename)); |
| 617 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 618 | p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", |
| 619 | -ecode, ename); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 620 | } |
| 621 | kfree(ename); |
| 622 | } else { |
| 623 | err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| 624 | err = -ecode; |
| 625 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 626 | p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 627 | } |
| 628 | return err; |
| 629 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 630 | out_err: |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 631 | p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 632 | return err; |
| 633 | } |
| 634 | |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 635 | static struct p9_req_t * |
| 636 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); |
| 637 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 638 | /** |
| 639 | * p9_client_flush - flush (cancel) a request |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 640 | * @c: client state |
| 641 | * @oldreq: request to cancel |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 642 | * |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 643 | * This sents a flush for a particular request and links |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 644 | * the flush request to the original request. The current |
| 645 | * code only supports a single flush request although the protocol |
| 646 | * allows for multiple flush requests to be sent for a single request. |
| 647 | * |
| 648 | */ |
| 649 | |
| 650 | static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) |
| 651 | { |
| 652 | struct p9_req_t *req; |
| 653 | int16_t oldtag; |
| 654 | int err; |
| 655 | |
| 656 | err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); |
| 657 | if (err) |
| 658 | return err; |
| 659 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 660 | p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 661 | |
| 662 | req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); |
| 663 | if (IS_ERR(req)) |
| 664 | return PTR_ERR(req); |
| 665 | |
Simon Derr | 1cff330 | 2013-06-21 15:32:42 +0200 | [diff] [blame] | 666 | /* |
| 667 | * if we haven't received a response for oldreq, |
Andi Shyti | 60ff779 | 2013-07-25 10:54:24 +0200 | [diff] [blame] | 668 | * remove it from the list |
Simon Derr | 1cff330 | 2013-06-21 15:32:42 +0200 | [diff] [blame] | 669 | */ |
Simon Derr | 0bfd684 | 2014-03-10 16:38:52 +0100 | [diff] [blame] | 670 | if (oldreq->status == REQ_STATUS_SENT) |
Simon Derr | afd8d65 | 2014-03-10 16:38:49 +0100 | [diff] [blame] | 671 | if (c->trans_mod->cancelled) |
| 672 | c->trans_mod->cancelled(c, oldreq); |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 673 | |
| 674 | p9_free_req(c, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 675 | return 0; |
| 676 | } |
| 677 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 678 | static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, |
| 679 | int8_t type, int req_size, |
| 680 | const char *fmt, va_list ap) |
| 681 | { |
| 682 | int tag, err; |
| 683 | struct p9_req_t *req; |
| 684 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 685 | p9_debug(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 686 | |
| 687 | /* we allow for any status other than disconnected */ |
| 688 | if (c->status == Disconnected) |
| 689 | return ERR_PTR(-EIO); |
| 690 | |
| 691 | /* if status is begin_disconnected we allow only clunk request */ |
| 692 | if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) |
| 693 | return ERR_PTR(-EIO); |
| 694 | |
| 695 | tag = P9_NOTAG; |
| 696 | if (type != P9_TVERSION) { |
| 697 | tag = p9_idpool_get(c->tagpool); |
| 698 | if (tag < 0) |
| 699 | return ERR_PTR(-ENOMEM); |
| 700 | } |
| 701 | |
| 702 | req = p9_tag_alloc(c, tag, req_size); |
| 703 | if (IS_ERR(req)) |
| 704 | return req; |
| 705 | |
| 706 | /* marshall the data */ |
| 707 | p9pdu_prepare(req->tc, tag, type); |
| 708 | err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
| 709 | if (err) |
| 710 | goto reterr; |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 711 | p9pdu_finalize(c, req->tc); |
| 712 | trace_9p_client_req(c, type, tag); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 713 | return req; |
| 714 | reterr: |
| 715 | p9_free_req(c, req); |
| 716 | return ERR_PTR(err); |
| 717 | } |
| 718 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 719 | /** |
| 720 | * p9_client_rpc - issue a request and wait for a response |
| 721 | * @c: client session |
| 722 | * @type: type of request |
| 723 | * @fmt: protocol format string (see protocol.c) |
| 724 | * |
| 725 | * Returns request structure (which client must free using p9_free_req) |
| 726 | */ |
| 727 | |
| 728 | static struct p9_req_t * |
| 729 | p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) |
| 730 | { |
| 731 | va_list ap; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 732 | int sigpending, err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 733 | unsigned long flags; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 734 | struct p9_req_t *req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 735 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 736 | va_start(ap, fmt); |
| 737 | req = p9_client_prepare_req(c, type, c->msize, fmt, ap); |
| 738 | va_end(ap); |
| 739 | if (IS_ERR(req)) |
| 740 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 741 | |
| 742 | if (signal_pending(current)) { |
| 743 | sigpending = 1; |
| 744 | clear_thread_flag(TIF_SIGPENDING); |
| 745 | } else |
| 746 | sigpending = 0; |
| 747 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 748 | err = c->trans_mod->request(c, req); |
| 749 | if (err < 0) { |
M. Mohan Kumar | 3cd7967 | 2011-04-15 13:59:33 +0530 | [diff] [blame] | 750 | if (err != -ERESTARTSYS && err != -EFAULT) |
Venkateswararao Jujjuri (JV) | 52f44e0 | 2010-09-29 18:33:41 -0700 | [diff] [blame] | 751 | c->status = Disconnected; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 752 | goto reterr; |
| 753 | } |
Jim Garlick | a314f27 | 2012-02-01 12:48:53 -0800 | [diff] [blame] | 754 | again: |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 755 | /* Wait for the response */ |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 756 | err = wait_event_interruptible(*req->wq, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 757 | req->status >= REQ_STATUS_RCVD); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 758 | |
Dominique Martinet | 2b6e72e | 2014-01-17 18:31:00 +0100 | [diff] [blame] | 759 | /* |
| 760 | * Make sure our req is coherent with regard to updates in other |
| 761 | * threads - echoes to wmb() in the callback |
| 762 | */ |
| 763 | smp_rmb(); |
| 764 | |
Jim Garlick | a314f27 | 2012-02-01 12:48:53 -0800 | [diff] [blame] | 765 | if ((err == -ERESTARTSYS) && (c->status == Connected) |
| 766 | && (type == P9_TFLUSH)) { |
| 767 | sigpending = 1; |
| 768 | clear_thread_flag(TIF_SIGPENDING); |
| 769 | goto again; |
| 770 | } |
| 771 | |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 772 | if (req->status == REQ_STATUS_ERROR) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 773 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 774 | err = req->t_err; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 775 | } |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 776 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 777 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 778 | sigpending = 1; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 779 | clear_thread_flag(TIF_SIGPENDING); |
| 780 | |
Latchesar Ionkov | 1bab88b | 2009-04-05 16:28:59 -0500 | [diff] [blame] | 781 | if (c->trans_mod->cancel(c, req)) |
| 782 | p9_client_flush(c, req); |
| 783 | |
| 784 | /* if we received the response anyway, don't signal error */ |
| 785 | if (req->status == REQ_STATUS_RCVD) |
| 786 | err = 0; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 787 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 788 | if (sigpending) { |
| 789 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 790 | recalc_sigpending(); |
| 791 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 792 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 793 | if (err < 0) |
| 794 | goto reterr; |
| 795 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 796 | err = p9_check_errors(c, req); |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 797 | trace_9p_client_res(c, type, req->rc->tag, err); |
| 798 | if (!err) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 799 | return req; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 800 | reterr: |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 801 | p9_free_req(c, req); |
Simon Derr | 43def35 | 2012-08-10 15:52:06 +0200 | [diff] [blame] | 802 | return ERR_PTR(safe_errno(err)); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 803 | } |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 804 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 805 | /** |
| 806 | * p9_client_zc_rpc - issue a request and wait for a response |
| 807 | * @c: client session |
| 808 | * @type: type of request |
| 809 | * @uidata: user bffer that should be ued for zero copy read |
| 810 | * @uodata: user buffer that shoud be user for zero copy write |
| 811 | * @inlen: read buffer size |
| 812 | * @olen: write buffer size |
| 813 | * @hdrlen: reader header size, This is the size of response protocol data |
| 814 | * @fmt: protocol format string (see protocol.c) |
| 815 | * |
| 816 | * Returns request structure (which client must free using p9_free_req) |
| 817 | */ |
| 818 | static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, |
| 819 | char *uidata, char *uodata, |
| 820 | int inlen, int olen, int in_hdrlen, |
| 821 | int kern_buf, const char *fmt, ...) |
| 822 | { |
| 823 | va_list ap; |
| 824 | int sigpending, err; |
| 825 | unsigned long flags; |
| 826 | struct p9_req_t *req; |
| 827 | |
| 828 | va_start(ap, fmt); |
| 829 | /* |
| 830 | * We allocate a inline protocol data of only 4k bytes. |
| 831 | * The actual content is passed in zero-copy fashion. |
| 832 | */ |
| 833 | req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); |
| 834 | va_end(ap); |
| 835 | if (IS_ERR(req)) |
| 836 | return req; |
| 837 | |
| 838 | if (signal_pending(current)) { |
| 839 | sigpending = 1; |
| 840 | clear_thread_flag(TIF_SIGPENDING); |
| 841 | } else |
| 842 | sigpending = 0; |
| 843 | |
| 844 | /* If we are called with KERNEL_DS force kern_buf */ |
| 845 | if (segment_eq(get_fs(), KERNEL_DS)) |
| 846 | kern_buf = 1; |
| 847 | |
| 848 | err = c->trans_mod->zc_request(c, req, uidata, uodata, |
| 849 | inlen, olen, in_hdrlen, kern_buf); |
| 850 | if (err < 0) { |
| 851 | if (err == -EIO) |
| 852 | c->status = Disconnected; |
| 853 | goto reterr; |
| 854 | } |
| 855 | if (req->status == REQ_STATUS_ERROR) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 856 | p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 857 | err = req->t_err; |
| 858 | } |
| 859 | if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 860 | p9_debug(P9_DEBUG_MUX, "flushing\n"); |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 861 | sigpending = 1; |
| 862 | clear_thread_flag(TIF_SIGPENDING); |
| 863 | |
| 864 | if (c->trans_mod->cancel(c, req)) |
| 865 | p9_client_flush(c, req); |
| 866 | |
| 867 | /* if we received the response anyway, don't signal error */ |
| 868 | if (req->status == REQ_STATUS_RCVD) |
| 869 | err = 0; |
| 870 | } |
| 871 | if (sigpending) { |
| 872 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 873 | recalc_sigpending(); |
| 874 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 875 | } |
| 876 | if (err < 0) |
| 877 | goto reterr; |
| 878 | |
| 879 | err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf); |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 880 | trace_9p_client_res(c, type, req->rc->tag, err); |
| 881 | if (!err) |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 882 | return req; |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 883 | reterr: |
| 884 | p9_free_req(c, req); |
Simon Derr | 43def35 | 2012-08-10 15:52:06 +0200 | [diff] [blame] | 885 | return ERR_PTR(safe_errno(err)); |
Eric Van Hensbergen | 91b8534 | 2008-10-13 18:45:21 -0500 | [diff] [blame] | 886 | } |
| 887 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 888 | static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
| 889 | { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 890 | int ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 891 | struct p9_fid *fid; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 892 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 893 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 894 | p9_debug(P9_DEBUG_FID, "clnt %p\n", clnt); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 895 | fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
| 896 | if (!fid) |
| 897 | return ERR_PTR(-ENOMEM); |
| 898 | |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 899 | ret = p9_idpool_get(clnt->fidpool); |
Roel Kluin | 24e94de | 2009-01-18 21:32:11 -0800 | [diff] [blame] | 900 | if (ret < 0) { |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 901 | ret = -ENOSPC; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 902 | goto error; |
| 903 | } |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 904 | fid->fid = ret; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 905 | |
| 906 | memset(&fid->qid, 0, sizeof(struct p9_qid)); |
| 907 | fid->mode = -1; |
David Howells | f8b9d53 | 2008-11-14 10:38:44 +1100 | [diff] [blame] | 908 | fid->uid = current_fsuid(); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 909 | fid->clnt = clnt; |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 910 | fid->rdir = NULL; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 911 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 912 | list_add(&fid->flist, &clnt->fidlist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 913 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 914 | |
| 915 | return fid; |
| 916 | |
| 917 | error: |
| 918 | kfree(fid); |
Roel Kluin | 9f3e9bb | 2008-10-28 14:22:43 -0500 | [diff] [blame] | 919 | return ERR_PTR(ret); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | static void p9_fid_destroy(struct p9_fid *fid) |
| 923 | { |
| 924 | struct p9_client *clnt; |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 925 | unsigned long flags; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 926 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 927 | p9_debug(P9_DEBUG_FID, "fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 928 | clnt = fid->clnt; |
| 929 | p9_idpool_put(fid->fid, clnt->fidpool); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 930 | spin_lock_irqsave(&clnt->lock, flags); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 931 | list_del(&fid->flist); |
Tom Tucker | cac23d6 | 2008-10-23 16:31:02 -0500 | [diff] [blame] | 932 | spin_unlock_irqrestore(&clnt->lock, flags); |
Eric Van Hensbergen | 3e2796a | 2009-11-02 08:39:28 -0600 | [diff] [blame] | 933 | kfree(fid->rdir); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 934 | kfree(fid); |
| 935 | } |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 936 | |
stephen hemminger | 32a875a | 2010-10-19 06:48:16 +0000 | [diff] [blame] | 937 | static int p9_client_version(struct p9_client *c) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 938 | { |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 939 | int err = 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 940 | struct p9_req_t *req; |
| 941 | char *version; |
| 942 | int msize; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 943 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 944 | p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
| 945 | c->msize, c->proto_version); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 946 | |
| 947 | switch (c->proto_version) { |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 948 | case p9_proto_2000L: |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 949 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 950 | c->msize, "9P2000.L"); |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 951 | break; |
| 952 | case p9_proto_2000u: |
| 953 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 954 | c->msize, "9P2000.u"); |
| 955 | break; |
| 956 | case p9_proto_legacy: |
| 957 | req = p9_client_rpc(c, P9_TVERSION, "ds", |
| 958 | c->msize, "9P2000"); |
| 959 | break; |
| 960 | default: |
| 961 | return -EINVAL; |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 962 | } |
| 963 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 964 | if (IS_ERR(req)) |
| 965 | return PTR_ERR(req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 966 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 967 | err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 968 | if (err) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 969 | p9_debug(P9_DEBUG_9P, "version error %d\n", err); |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 970 | trace_9p_protocol_dump(c, req->rc); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 971 | goto error; |
| 972 | } |
| 973 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 974 | p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
Sripathi Kodi | 45bc21e | 2010-03-08 17:33:04 +0000 | [diff] [blame] | 975 | if (!strncmp(version, "9P2000.L", 8)) |
| 976 | c->proto_version = p9_proto_2000L; |
Sripathi Kodi | c5a7697 | 2010-03-05 18:51:04 +0000 | [diff] [blame] | 977 | else if (!strncmp(version, "9P2000.u", 8)) |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 978 | c->proto_version = p9_proto_2000u; |
| 979 | else if (!strncmp(version, "9P2000", 6)) |
| 980 | c->proto_version = p9_proto_legacy; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 981 | else { |
| 982 | err = -EREMOTEIO; |
| 983 | goto error; |
| 984 | } |
| 985 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 986 | if (msize < c->msize) |
| 987 | c->msize = msize; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 988 | |
| 989 | error: |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 990 | kfree(version); |
| 991 | p9_free_req(c, req); |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 992 | |
| 993 | return err; |
| 994 | } |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 995 | |
| 996 | struct p9_client *p9_client_create(const char *dev_name, char *options) |
| 997 | { |
| 998 | int err; |
| 999 | struct p9_client *clnt; |
Will Deacon | 50192ab | 2013-08-21 18:24:47 +0100 | [diff] [blame] | 1000 | char *client_id; |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 1001 | |
| 1002 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1003 | clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
| 1004 | if (!clnt) |
| 1005 | return ERR_PTR(-ENOMEM); |
| 1006 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 1007 | clnt->trans_mod = NULL; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 1008 | clnt->trans = NULL; |
Will Deacon | 50192ab | 2013-08-21 18:24:47 +0100 | [diff] [blame] | 1009 | |
| 1010 | client_id = utsname()->nodename; |
| 1011 | memcpy(clnt->name, client_id, strlen(client_id) + 1); |
| 1012 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1013 | spin_lock_init(&clnt->lock); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1014 | INIT_LIST_HEAD(&clnt->fidlist); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1015 | |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 1016 | err = p9_tag_init(clnt); |
| 1017 | if (err < 0) |
| 1018 | goto free_client; |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 1019 | |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 1020 | err = parse_opts(options, clnt); |
| 1021 | if (err < 0) |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 1022 | goto destroy_tagpool; |
Eric Van Hensbergen | bb8ffdf | 2008-03-07 10:53:53 -0600 | [diff] [blame] | 1023 | |
Abhishek Kulkarni | a17d172 | 2009-07-14 13:24:10 -0500 | [diff] [blame] | 1024 | if (!clnt->trans_mod) |
| 1025 | clnt->trans_mod = v9fs_get_default_trans(); |
| 1026 | |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1027 | if (clnt->trans_mod == NULL) { |
| 1028 | err = -EPROTONOSUPPORT; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1029 | p9_debug(P9_DEBUG_ERROR, |
| 1030 | "No transport defined or default transport\n"); |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 1031 | goto destroy_tagpool; |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | clnt->fidpool = p9_idpool_create(); |
| 1035 | if (IS_ERR(clnt->fidpool)) { |
| 1036 | err = PTR_ERR(clnt->fidpool); |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1037 | goto put_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1038 | } |
| 1039 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1040 | p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
| 1041 | clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1042 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1043 | err = clnt->trans_mod->create(clnt, dev_name, options); |
| 1044 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1045 | goto destroy_fidpool; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1046 | |
Venkateswararao Jujjuri (JV) | c9ffb05 | 2011-06-29 18:06:33 -0700 | [diff] [blame] | 1047 | if (clnt->msize > clnt->trans_mod->maxsize) |
| 1048 | clnt->msize = clnt->trans_mod->maxsize; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 1049 | |
Eric Van Hensbergen | 6936bf6 | 2008-10-13 20:36:14 -0500 | [diff] [blame] | 1050 | err = p9_client_version(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1051 | if (err) |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1052 | goto close_trans; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1053 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1054 | return clnt; |
| 1055 | |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1056 | close_trans: |
| 1057 | clnt->trans_mod->close(clnt); |
| 1058 | destroy_fidpool: |
| 1059 | p9_idpool_destroy(clnt->fidpool); |
| 1060 | put_trans: |
| 1061 | v9fs_put_trans(clnt->trans_mod); |
Aneesh Kumar K.V | fe1cbab | 2011-05-20 18:55:52 +0000 | [diff] [blame] | 1062 | destroy_tagpool: |
| 1063 | p9_idpool_destroy(clnt->tagpool); |
Eric Van Hensbergen | 8781ff9 | 2010-02-08 18:18:34 -0600 | [diff] [blame] | 1064 | free_client: |
| 1065 | kfree(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1066 | return ERR_PTR(err); |
| 1067 | } |
| 1068 | EXPORT_SYMBOL(p9_client_create); |
| 1069 | |
| 1070 | void p9_client_destroy(struct p9_client *clnt) |
| 1071 | { |
| 1072 | struct p9_fid *fid, *fidptr; |
| 1073 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1074 | p9_debug(P9_DEBUG_MUX, "clnt %p\n", clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1075 | |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1076 | if (clnt->trans_mod) |
| 1077 | clnt->trans_mod->close(clnt); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1078 | |
Tejun Heo | 72029fe | 2008-09-24 16:22:23 -0500 | [diff] [blame] | 1079 | v9fs_put_trans(clnt->trans_mod); |
| 1080 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1081 | list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1082 | pr_info("Found fid %d not clunked\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1083 | p9_fid_destroy(fid); |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1084 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1085 | |
Eric Van Hensbergen | 0af8887 | 2007-07-13 16:47:58 -0500 | [diff] [blame] | 1086 | if (clnt->fidpool) |
| 1087 | p9_idpool_destroy(clnt->fidpool); |
| 1088 | |
Eric Van Hensbergen | fea511a | 2008-10-13 18:45:23 -0500 | [diff] [blame] | 1089 | p9_tag_cleanup(clnt); |
| 1090 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1091 | kfree(clnt); |
| 1092 | } |
| 1093 | EXPORT_SYMBOL(p9_client_destroy); |
| 1094 | |
| 1095 | void p9_client_disconnect(struct p9_client *clnt) |
| 1096 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1097 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 1098 | clnt->status = Disconnected; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1099 | } |
| 1100 | EXPORT_SYMBOL(p9_client_disconnect); |
| 1101 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1102 | void p9_client_begin_disconnect(struct p9_client *clnt) |
| 1103 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1104 | p9_debug(P9_DEBUG_9P, "clnt %p\n", clnt); |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 1105 | clnt->status = BeginDisconnect; |
| 1106 | } |
| 1107 | EXPORT_SYMBOL(p9_client_begin_disconnect); |
| 1108 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1109 | struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1110 | char *uname, kuid_t n_uname, char *aname) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1111 | { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1112 | int err = 0; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1113 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1114 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1115 | struct p9_qid qid; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1116 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1117 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1118 | p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
| 1119 | afid ? afid->fid : -1, uname, aname); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1120 | fid = p9_fid_create(clnt); |
| 1121 | if (IS_ERR(fid)) { |
| 1122 | err = PTR_ERR(fid); |
| 1123 | fid = NULL; |
| 1124 | goto error; |
| 1125 | } |
| 1126 | |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1127 | req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1128 | afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
| 1129 | if (IS_ERR(req)) { |
| 1130 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1131 | goto error; |
| 1132 | } |
| 1133 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1134 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1135 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1136 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1137 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1138 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1139 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1140 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1141 | p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
| 1142 | qid.type, (unsigned long long)qid.path, qid.version); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1143 | |
| 1144 | memmove(&fid->qid, &qid, sizeof(struct p9_qid)); |
| 1145 | |
| 1146 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1147 | return fid; |
| 1148 | |
| 1149 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1150 | if (fid) |
| 1151 | p9_fid_destroy(fid); |
| 1152 | return ERR_PTR(err); |
| 1153 | } |
| 1154 | EXPORT_SYMBOL(p9_client_attach); |
| 1155 | |
Harsh Prateek Bora | b76225e | 2011-03-31 15:49:39 +0530 | [diff] [blame] | 1156 | struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
| 1157 | char **wnames, int clone) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1158 | { |
| 1159 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1160 | struct p9_client *clnt; |
| 1161 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1162 | struct p9_qid *wqids; |
| 1163 | struct p9_req_t *req; |
Harsh Prateek Bora | b76225e | 2011-03-31 15:49:39 +0530 | [diff] [blame] | 1164 | uint16_t nwqids, count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1165 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1166 | err = 0; |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1167 | wqids = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1168 | clnt = oldfid->clnt; |
| 1169 | if (clone) { |
| 1170 | fid = p9_fid_create(clnt); |
| 1171 | if (IS_ERR(fid)) { |
| 1172 | err = PTR_ERR(fid); |
| 1173 | fid = NULL; |
| 1174 | goto error; |
| 1175 | } |
| 1176 | |
| 1177 | fid->uid = oldfid->uid; |
| 1178 | } else |
| 1179 | fid = oldfid; |
| 1180 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1181 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1182 | p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s\n", |
| 1183 | oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1184 | |
| 1185 | req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, |
| 1186 | nwname, wnames); |
| 1187 | if (IS_ERR(req)) { |
| 1188 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1189 | goto error; |
| 1190 | } |
| 1191 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1192 | err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1193 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1194 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1195 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1196 | goto clunk_fid; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1197 | } |
| 1198 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1199 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1200 | p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1201 | |
| 1202 | if (nwqids != nwname) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1203 | err = -ENOENT; |
| 1204 | goto clunk_fid; |
| 1205 | } |
| 1206 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1207 | for (count = 0; count < nwqids; count++) |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1208 | p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1209 | count, wqids[count].type, |
| 1210 | (unsigned long long)wqids[count].path, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1211 | wqids[count].version); |
| 1212 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1213 | if (nwname) |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1214 | memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1215 | else |
| 1216 | fid->qid = oldfid->qid; |
| 1217 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1218 | kfree(wqids); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1219 | return fid; |
| 1220 | |
| 1221 | clunk_fid: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1222 | kfree(wqids); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1223 | p9_client_clunk(fid); |
| 1224 | fid = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1225 | |
| 1226 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1227 | if (fid && (fid != oldfid)) |
| 1228 | p9_fid_destroy(fid); |
| 1229 | |
| 1230 | return ERR_PTR(err); |
| 1231 | } |
| 1232 | EXPORT_SYMBOL(p9_client_walk); |
| 1233 | |
| 1234 | int p9_client_open(struct p9_fid *fid, int mode) |
| 1235 | { |
| 1236 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1237 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1238 | struct p9_req_t *req; |
| 1239 | struct p9_qid qid; |
| 1240 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1241 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1242 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1243 | p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1244 | p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
| 1245 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1246 | |
| 1247 | if (fid->mode != -1) |
| 1248 | return -EINVAL; |
| 1249 | |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1250 | if (p9_is_proto_dotl(clnt)) |
| 1251 | req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); |
| 1252 | else |
| 1253 | req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1254 | if (IS_ERR(req)) { |
| 1255 | err = PTR_ERR(req); |
| 1256 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1257 | } |
| 1258 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1259 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1260 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1261 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1262 | goto free_and_error; |
| 1263 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1264 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1265 | p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
M. Mohan Kumar | ef56547 | 2010-06-22 19:47:50 +0530 | [diff] [blame] | 1266 | p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
| 1267 | (unsigned long long)qid.path, qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1268 | |
| 1269 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1270 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1271 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1272 | free_and_error: |
| 1273 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1274 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1275 | return err; |
| 1276 | } |
| 1277 | EXPORT_SYMBOL(p9_client_open); |
| 1278 | |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1279 | int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1280 | kgid_t gid, struct p9_qid *qid) |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1281 | { |
| 1282 | int err = 0; |
| 1283 | struct p9_client *clnt; |
| 1284 | struct p9_req_t *req; |
| 1285 | int iounit; |
| 1286 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1287 | p9_debug(P9_DEBUG_9P, |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1288 | ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1289 | ofid->fid, name, flags, mode, |
| 1290 | from_kgid(&init_user_ns, gid)); |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1291 | clnt = ofid->clnt; |
| 1292 | |
| 1293 | if (ofid->mode != -1) |
| 1294 | return -EINVAL; |
| 1295 | |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1296 | req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1297 | mode, gid); |
| 1298 | if (IS_ERR(req)) { |
| 1299 | err = PTR_ERR(req); |
| 1300 | goto error; |
| 1301 | } |
| 1302 | |
| 1303 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); |
| 1304 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1305 | trace_9p_protocol_dump(clnt, req->rc); |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1306 | goto free_and_error; |
| 1307 | } |
| 1308 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1309 | p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 1310 | qid->type, |
| 1311 | (unsigned long long)qid->path, |
| 1312 | qid->version, iounit); |
| 1313 | |
| 1314 | ofid->mode = mode; |
| 1315 | ofid->iounit = iounit; |
| 1316 | |
| 1317 | free_and_error: |
| 1318 | p9_free_req(clnt, req); |
| 1319 | error: |
| 1320 | return err; |
| 1321 | } |
| 1322 | EXPORT_SYMBOL(p9_client_create_dotl); |
| 1323 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1324 | int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
| 1325 | char *extension) |
| 1326 | { |
| 1327 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1328 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1329 | struct p9_req_t *req; |
| 1330 | struct p9_qid qid; |
| 1331 | int iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1332 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1333 | p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1334 | fid->fid, name, perm, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1335 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1336 | clnt = fid->clnt; |
| 1337 | |
| 1338 | if (fid->mode != -1) |
| 1339 | return -EINVAL; |
| 1340 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1341 | req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, |
| 1342 | mode, extension); |
| 1343 | if (IS_ERR(req)) { |
| 1344 | err = PTR_ERR(req); |
| 1345 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1346 | } |
| 1347 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1348 | err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1349 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1350 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1351 | goto free_and_error; |
| 1352 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1353 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1354 | p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1355 | qid.type, |
| 1356 | (unsigned long long)qid.path, |
| 1357 | qid.version, iounit); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1358 | |
| 1359 | fid->mode = mode; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1360 | fid->iounit = iounit; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1361 | |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1362 | free_and_error: |
| 1363 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1364 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1365 | return err; |
| 1366 | } |
| 1367 | EXPORT_SYMBOL(p9_client_fcreate); |
| 1368 | |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1369 | int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, kgid_t gid, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1370 | struct p9_qid *qid) |
| 1371 | { |
| 1372 | int err = 0; |
| 1373 | struct p9_client *clnt; |
| 1374 | struct p9_req_t *req; |
| 1375 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1376 | p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1377 | dfid->fid, name, symtgt); |
| 1378 | clnt = dfid->clnt; |
| 1379 | |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 1380 | req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1381 | gid); |
| 1382 | if (IS_ERR(req)) { |
| 1383 | err = PTR_ERR(req); |
| 1384 | goto error; |
| 1385 | } |
| 1386 | |
| 1387 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 1388 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1389 | trace_9p_protocol_dump(clnt, req->rc); |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1390 | goto free_and_error; |
| 1391 | } |
| 1392 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1393 | p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1394 | qid->type, (unsigned long long)qid->path, qid->version); |
| 1395 | |
| 1396 | free_and_error: |
| 1397 | p9_free_req(clnt, req); |
| 1398 | error: |
| 1399 | return err; |
| 1400 | } |
| 1401 | EXPORT_SYMBOL(p9_client_symlink); |
| 1402 | |
Venkateswararao Jujjuri (JV) | 652df9a | 2010-06-03 15:16:59 -0700 | [diff] [blame] | 1403 | int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
| 1404 | { |
| 1405 | struct p9_client *clnt; |
| 1406 | struct p9_req_t *req; |
| 1407 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1408 | p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
Venkateswararao Jujjuri (JV) | 652df9a | 2010-06-03 15:16:59 -0700 | [diff] [blame] | 1409 | dfid->fid, oldfid->fid, newname); |
| 1410 | clnt = dfid->clnt; |
| 1411 | req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, |
| 1412 | newname); |
| 1413 | if (IS_ERR(req)) |
| 1414 | return PTR_ERR(req); |
| 1415 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1416 | p9_debug(P9_DEBUG_9P, "<<< RLINK\n"); |
Venkateswararao Jujjuri (JV) | 652df9a | 2010-06-03 15:16:59 -0700 | [diff] [blame] | 1417 | p9_free_req(clnt, req); |
| 1418 | return 0; |
| 1419 | } |
| 1420 | EXPORT_SYMBOL(p9_client_link); |
| 1421 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1422 | int p9_client_fsync(struct p9_fid *fid, int datasync) |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1423 | { |
| 1424 | int err; |
| 1425 | struct p9_client *clnt; |
| 1426 | struct p9_req_t *req; |
| 1427 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1428 | p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n", |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1429 | fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1430 | err = 0; |
| 1431 | clnt = fid->clnt; |
| 1432 | |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 1433 | req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1434 | if (IS_ERR(req)) { |
| 1435 | err = PTR_ERR(req); |
| 1436 | goto error; |
| 1437 | } |
| 1438 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1439 | p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
Venkateswararao Jujjuri (JV) | 920e65d | 2010-09-22 17:19:19 -0700 | [diff] [blame] | 1440 | |
| 1441 | p9_free_req(clnt, req); |
| 1442 | |
| 1443 | error: |
| 1444 | return err; |
| 1445 | } |
| 1446 | EXPORT_SYMBOL(p9_client_fsync); |
| 1447 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1448 | int p9_client_clunk(struct p9_fid *fid) |
| 1449 | { |
| 1450 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1451 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1452 | struct p9_req_t *req; |
Jim Garlick | 208f3c2 | 2012-02-26 14:49:57 -0600 | [diff] [blame] | 1453 | int retries = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1454 | |
jvrao | 8e44a08 | 2010-08-25 16:27:06 +0000 | [diff] [blame] | 1455 | if (!fid) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1456 | pr_warn("%s (%d): Trying to clunk with NULL fid\n", |
| 1457 | __func__, task_pid_nr(current)); |
jvrao | 8e44a08 | 2010-08-25 16:27:06 +0000 | [diff] [blame] | 1458 | dump_stack(); |
| 1459 | return 0; |
| 1460 | } |
| 1461 | |
Jim Garlick | 208f3c2 | 2012-02-26 14:49:57 -0600 | [diff] [blame] | 1462 | again: |
| 1463 | p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d)\n", fid->fid, |
| 1464 | retries); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1465 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1466 | clnt = fid->clnt; |
| 1467 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1468 | req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
| 1469 | if (IS_ERR(req)) { |
| 1470 | err = PTR_ERR(req); |
| 1471 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1472 | } |
| 1473 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1474 | p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1475 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1476 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1477 | error: |
Aneesh Kumar K.V | 5034990 | 2011-07-11 16:40:58 +0000 | [diff] [blame] | 1478 | /* |
| 1479 | * Fid is not valid even after a failed clunk |
Jim Garlick | 208f3c2 | 2012-02-26 14:49:57 -0600 | [diff] [blame] | 1480 | * If interrupted, retry once then give up and |
| 1481 | * leak fid until umount. |
Aneesh Kumar K.V | 5034990 | 2011-07-11 16:40:58 +0000 | [diff] [blame] | 1482 | */ |
Jim Garlick | 208f3c2 | 2012-02-26 14:49:57 -0600 | [diff] [blame] | 1483 | if (err == -ERESTARTSYS) { |
| 1484 | if (retries++ == 0) |
| 1485 | goto again; |
| 1486 | } else |
| 1487 | p9_fid_destroy(fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1488 | return err; |
| 1489 | } |
| 1490 | EXPORT_SYMBOL(p9_client_clunk); |
| 1491 | |
| 1492 | int p9_client_remove(struct p9_fid *fid) |
| 1493 | { |
| 1494 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1495 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1496 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1497 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1498 | p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1499 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1500 | clnt = fid->clnt; |
| 1501 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1502 | req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
| 1503 | if (IS_ERR(req)) { |
| 1504 | err = PTR_ERR(req); |
| 1505 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1506 | } |
| 1507 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1508 | p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1509 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1510 | p9_free_req(clnt, req); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1511 | error: |
Jim Garlick | 208f3c2 | 2012-02-26 14:49:57 -0600 | [diff] [blame] | 1512 | if (err == -ERESTARTSYS) |
| 1513 | p9_client_clunk(fid); |
| 1514 | else |
| 1515 | p9_fid_destroy(fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1516 | return err; |
| 1517 | } |
| 1518 | EXPORT_SYMBOL(p9_client_remove); |
| 1519 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 1520 | int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) |
| 1521 | { |
| 1522 | int err = 0; |
| 1523 | struct p9_req_t *req; |
| 1524 | struct p9_client *clnt; |
| 1525 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1526 | p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d\n", |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 1527 | dfid->fid, name, flags); |
| 1528 | |
| 1529 | clnt = dfid->clnt; |
| 1530 | req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); |
| 1531 | if (IS_ERR(req)) { |
| 1532 | err = PTR_ERR(req); |
| 1533 | goto error; |
| 1534 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1535 | p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s\n", dfid->fid, name); |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 1536 | |
| 1537 | p9_free_req(clnt, req); |
| 1538 | error: |
| 1539 | return err; |
| 1540 | } |
| 1541 | EXPORT_SYMBOL(p9_client_unlinkat); |
| 1542 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1543 | int |
| 1544 | p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, |
| 1545 | u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1546 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1547 | char *dataptr; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1548 | int kernel_buf = 0; |
| 1549 | struct p9_req_t *req; |
| 1550 | struct p9_client *clnt; |
| 1551 | int err, rsize, non_zc = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1552 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1553 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1554 | p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1555 | fid->fid, (unsigned long long) offset, count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1556 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1557 | clnt = fid->clnt; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1558 | |
| 1559 | rsize = fid->iounit; |
| 1560 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1561 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1562 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1563 | if (count < rsize) |
| 1564 | rsize = count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1565 | |
Rob Landley | aca0076 | 2011-05-08 18:46:38 +0000 | [diff] [blame] | 1566 | /* Don't bother zerocopy for small IO (< 1024) */ |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1567 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 1568 | char *indata; |
| 1569 | if (data) { |
| 1570 | kernel_buf = 1; |
| 1571 | indata = data; |
| 1572 | } else |
Joe Perches | f07d901 | 2012-06-04 07:16:14 +0000 | [diff] [blame] | 1573 | indata = (__force char *)udata; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1574 | /* |
| 1575 | * response header len is 11 |
| 1576 | * PDU Header(7) + IO Size (4) |
| 1577 | */ |
| 1578 | req = p9_client_zc_rpc(clnt, P9_TREAD, indata, NULL, rsize, 0, |
| 1579 | 11, kernel_buf, "dqd", fid->fid, |
| 1580 | offset, rsize); |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1581 | } else { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1582 | non_zc = 1; |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1583 | 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] | 1584 | rsize); |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1585 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1586 | if (IS_ERR(req)) { |
| 1587 | err = PTR_ERR(req); |
| 1588 | goto error; |
| 1589 | } |
| 1590 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1591 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1592 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1593 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1594 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1595 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1596 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1597 | p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1598 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1599 | if (non_zc) { |
Venkateswararao Jujjuri (JV) | bb2f8a5 | 2011-01-28 17:05:59 -0800 | [diff] [blame] | 1600 | if (data) { |
| 1601 | memmove(data, dataptr, count); |
| 1602 | } else { |
| 1603 | err = copy_to_user(udata, dataptr, count); |
| 1604 | if (err) { |
| 1605 | err = -EFAULT; |
| 1606 | goto free_and_error; |
| 1607 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1608 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1609 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1610 | p9_free_req(clnt, req); |
| 1611 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1612 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1613 | free_and_error: |
| 1614 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1615 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1616 | return err; |
| 1617 | } |
| 1618 | EXPORT_SYMBOL(p9_client_read); |
| 1619 | |
Eric Van Hensbergen | 0fc9655 | 2008-10-13 20:36:17 -0500 | [diff] [blame] | 1620 | int |
| 1621 | p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
| 1622 | u64 offset, u32 count) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1623 | { |
David S. Miller | 095d3da | 2011-04-12 15:58:41 -0700 | [diff] [blame] | 1624 | int err, rsize; |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1625 | int kernel_buf = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1626 | struct p9_client *clnt; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1627 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1628 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1629 | p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1630 | fid->fid, (unsigned long long) offset, count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1631 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1632 | clnt = fid->clnt; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1633 | |
| 1634 | rsize = fid->iounit; |
| 1635 | if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| 1636 | rsize = clnt->msize - P9_IOHDRSZ; |
| 1637 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1638 | if (count < rsize) |
| 1639 | rsize = count; |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1640 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1641 | /* Don't bother zerocopy for small IO (< 1024) */ |
| 1642 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 1643 | char *odata; |
| 1644 | if (data) { |
| 1645 | kernel_buf = 1; |
| 1646 | odata = data; |
| 1647 | } else |
| 1648 | odata = (char *)udata; |
| 1649 | req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, odata, 0, rsize, |
| 1650 | P9_ZC_HDR_SZ, kernel_buf, "dqd", |
| 1651 | fid->fid, offset, rsize); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1652 | } else { |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1653 | if (data) |
| 1654 | req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1655 | offset, rsize, data); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1656 | else |
| 1657 | req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 1658 | offset, rsize, udata); |
Venkateswararao Jujjuri (JV) | 1fc5248 | 2011-02-13 16:23:59 -0800 | [diff] [blame] | 1659 | } |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1660 | if (IS_ERR(req)) { |
| 1661 | err = PTR_ERR(req); |
| 1662 | goto error; |
| 1663 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1664 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1665 | err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1666 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1667 | trace_9p_protocol_dump(clnt, req->rc); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1668 | goto free_and_error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1669 | } |
| 1670 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1671 | p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1672 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1673 | p9_free_req(clnt, req); |
| 1674 | return count; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1675 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1676 | free_and_error: |
| 1677 | p9_free_req(clnt, req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1678 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1679 | return err; |
| 1680 | } |
| 1681 | EXPORT_SYMBOL(p9_client_write); |
| 1682 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1683 | struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1684 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1685 | int err; |
| 1686 | struct p9_client *clnt; |
| 1687 | struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); |
| 1688 | struct p9_req_t *req; |
| 1689 | u16 ignored; |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1690 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1691 | p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1692 | |
Eric Van Hensbergen | 5503ac5 | 2008-10-13 18:45:24 -0500 | [diff] [blame] | 1693 | if (!ret) |
| 1694 | return ERR_PTR(-ENOMEM); |
| 1695 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1696 | err = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1697 | clnt = fid->clnt; |
| 1698 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1699 | req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
| 1700 | if (IS_ERR(req)) { |
| 1701 | err = PTR_ERR(req); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1702 | goto error; |
| 1703 | } |
| 1704 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1705 | err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1706 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1707 | trace_9p_protocol_dump(clnt, req->rc); |
Abhishek Kulkarni | eedfe1c | 2009-07-14 13:25:41 -0500 | [diff] [blame] | 1708 | p9_free_req(clnt, req); |
| 1709 | goto error; |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1710 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1711 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1712 | p9_debug(P9_DEBUG_9P, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1713 | "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1714 | "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1715 | "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1716 | "<<< uid=%d gid=%d n_muid=%d\n", |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1717 | ret->size, ret->type, ret->dev, ret->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1718 | (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, |
| 1719 | ret->atime, ret->mtime, (unsigned long long)ret->length, |
| 1720 | ret->name, ret->uid, ret->gid, ret->muid, ret->extension, |
Eric W. Biederman | 447c509 | 2013-01-29 16:18:50 -0800 | [diff] [blame] | 1721 | from_kuid(&init_user_ns, ret->n_uid), |
| 1722 | from_kgid(&init_user_ns, ret->n_gid), |
| 1723 | from_kuid(&init_user_ns, ret->n_muid)); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1724 | |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1725 | p9_free_req(clnt, req); |
| 1726 | return ret; |
| 1727 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1728 | error: |
Latchesar Ionkov | 742b11a | 2009-04-05 16:26:41 -0500 | [diff] [blame] | 1729 | kfree(ret); |
| 1730 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1731 | } |
| 1732 | EXPORT_SYMBOL(p9_client_stat); |
| 1733 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1734 | struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, |
| 1735 | u64 request_mask) |
| 1736 | { |
| 1737 | int err; |
| 1738 | struct p9_client *clnt; |
| 1739 | struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), |
| 1740 | GFP_KERNEL); |
| 1741 | struct p9_req_t *req; |
| 1742 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1743 | p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1744 | fid->fid, request_mask); |
| 1745 | |
| 1746 | if (!ret) |
| 1747 | return ERR_PTR(-ENOMEM); |
| 1748 | |
| 1749 | err = 0; |
| 1750 | clnt = fid->clnt; |
| 1751 | |
| 1752 | req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); |
| 1753 | if (IS_ERR(req)) { |
| 1754 | err = PTR_ERR(req); |
| 1755 | goto error; |
| 1756 | } |
| 1757 | |
| 1758 | err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); |
| 1759 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1760 | trace_9p_protocol_dump(clnt, req->rc); |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1761 | p9_free_req(clnt, req); |
| 1762 | goto error; |
| 1763 | } |
| 1764 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1765 | p9_debug(P9_DEBUG_9P, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1766 | "<<< RGETATTR st_result_mask=%lld\n" |
| 1767 | "<<< qid=%x.%llx.%x\n" |
| 1768 | "<<< st_mode=%8.8x st_nlink=%llu\n" |
| 1769 | "<<< st_uid=%d st_gid=%d\n" |
| 1770 | "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" |
| 1771 | "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" |
| 1772 | "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" |
| 1773 | "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" |
| 1774 | "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" |
| 1775 | "<<< st_gen=%lld st_data_version=%lld", |
| 1776 | ret->st_result_mask, ret->qid.type, ret->qid.path, |
Eric W. Biederman | 447c509 | 2013-01-29 16:18:50 -0800 | [diff] [blame] | 1777 | ret->qid.version, ret->st_mode, ret->st_nlink, |
| 1778 | from_kuid(&init_user_ns, ret->st_uid), |
| 1779 | from_kgid(&init_user_ns, ret->st_gid), |
| 1780 | ret->st_rdev, ret->st_size, ret->st_blksize, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1781 | ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, |
| 1782 | ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, |
| 1783 | ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, |
| 1784 | ret->st_gen, ret->st_data_version); |
| 1785 | |
| 1786 | p9_free_req(clnt, req); |
| 1787 | return ret; |
| 1788 | |
| 1789 | error: |
| 1790 | kfree(ret); |
| 1791 | return ERR_PTR(err); |
| 1792 | } |
| 1793 | EXPORT_SYMBOL(p9_client_getattr_dotl); |
| 1794 | |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1795 | static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1796 | { |
| 1797 | int ret; |
| 1798 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1799 | /* NOTE: size shouldn't include its own length */ |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1800 | /* size[2] type[2] dev[4] qid[13] */ |
| 1801 | /* mode[4] atime[4] mtime[4] length[8]*/ |
| 1802 | /* name[s] uid[s] gid[s] muid[s] */ |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1803 | ret = 2+4+13+4+4+4+8+2+2+2+2; |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1804 | |
| 1805 | if (wst->name) |
| 1806 | ret += strlen(wst->name); |
| 1807 | if (wst->uid) |
| 1808 | ret += strlen(wst->uid); |
| 1809 | if (wst->gid) |
| 1810 | ret += strlen(wst->gid); |
| 1811 | if (wst->muid) |
| 1812 | ret += strlen(wst->muid); |
| 1813 | |
Sripathi Kodi | c56e4ac | 2010-03-25 12:40:35 +0000 | [diff] [blame] | 1814 | if ((proto_version == p9_proto_2000u) || |
| 1815 | (proto_version == p9_proto_2000L)) { |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1816 | ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ |
| 1817 | if (wst->extension) |
| 1818 | ret += strlen(wst->extension); |
| 1819 | } |
| 1820 | |
| 1821 | return ret; |
| 1822 | } |
| 1823 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1824 | int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
| 1825 | { |
| 1826 | int err; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1827 | struct p9_req_t *req; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1828 | struct p9_client *clnt; |
| 1829 | |
Latchesar Ionkov | 453ed90 | 2009-04-05 16:22:16 -0500 | [diff] [blame] | 1830 | err = 0; |
| 1831 | clnt = fid->clnt; |
Sripathi Kodi | 342fee1 | 2010-03-05 18:50:14 +0000 | [diff] [blame] | 1832 | wst->size = p9_client_statsize(wst, clnt->proto_version); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1833 | p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
| 1834 | p9_debug(P9_DEBUG_9P, |
Eric Van Hensbergen | e7f4b8f | 2008-10-17 16:20:07 -0500 | [diff] [blame] | 1835 | " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| 1836 | " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| 1837 | " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| 1838 | " uid=%d gid=%d n_muid=%d\n", |
| 1839 | wst->size, wst->type, wst->dev, wst->qid.type, |
Randy Dunlap | b0d5fde | 2008-11-04 20:46:46 -0800 | [diff] [blame] | 1840 | (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, |
| 1841 | wst->atime, wst->mtime, (unsigned long long)wst->length, |
| 1842 | wst->name, wst->uid, wst->gid, wst->muid, wst->extension, |
Eric W. Biederman | 447c509 | 2013-01-29 16:18:50 -0800 | [diff] [blame] | 1843 | from_kuid(&init_user_ns, wst->n_uid), |
| 1844 | from_kgid(&init_user_ns, wst->n_gid), |
| 1845 | from_kuid(&init_user_ns, wst->n_muid)); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1846 | |
Eric Van Hensbergen | 9d6939d | 2010-01-15 19:01:56 -0600 | [diff] [blame] | 1847 | 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] | 1848 | if (IS_ERR(req)) { |
| 1849 | err = PTR_ERR(req); |
| 1850 | goto error; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1851 | } |
| 1852 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1853 | p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1854 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1855 | p9_free_req(clnt, req); |
| 1856 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1857 | return err; |
| 1858 | } |
| 1859 | EXPORT_SYMBOL(p9_client_wstat); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1860 | |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1861 | int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) |
| 1862 | { |
| 1863 | int err; |
| 1864 | struct p9_req_t *req; |
| 1865 | struct p9_client *clnt; |
| 1866 | |
| 1867 | err = 0; |
| 1868 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1869 | p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
| 1870 | p9_debug(P9_DEBUG_9P, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1871 | " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
| 1872 | " atime_sec=%lld atime_nsec=%lld\n" |
| 1873 | " mtime_sec=%lld mtime_nsec=%lld\n", |
Eric W. Biederman | 447c509 | 2013-01-29 16:18:50 -0800 | [diff] [blame] | 1874 | p9attr->valid, p9attr->mode, |
| 1875 | from_kuid(&init_user_ns, p9attr->uid), |
| 1876 | from_kgid(&init_user_ns, p9attr->gid), |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1877 | p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, |
| 1878 | p9attr->mtime_sec, p9attr->mtime_nsec); |
| 1879 | |
| 1880 | req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); |
| 1881 | |
| 1882 | if (IS_ERR(req)) { |
| 1883 | err = PTR_ERR(req); |
| 1884 | goto error; |
| 1885 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1886 | p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1887 | p9_free_req(clnt, req); |
| 1888 | error: |
| 1889 | return err; |
| 1890 | } |
| 1891 | EXPORT_SYMBOL(p9_client_setattr); |
| 1892 | |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1893 | int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) |
| 1894 | { |
| 1895 | int err; |
| 1896 | struct p9_req_t *req; |
| 1897 | struct p9_client *clnt; |
| 1898 | |
| 1899 | err = 0; |
| 1900 | clnt = fid->clnt; |
| 1901 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1902 | p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1903 | |
| 1904 | req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); |
| 1905 | if (IS_ERR(req)) { |
| 1906 | err = PTR_ERR(req); |
| 1907 | goto error; |
| 1908 | } |
| 1909 | |
| 1910 | err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, |
| 1911 | &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, |
| 1912 | &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); |
| 1913 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 1914 | trace_9p_protocol_dump(clnt, req->rc); |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1915 | p9_free_req(clnt, req); |
| 1916 | goto error; |
| 1917 | } |
| 1918 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1919 | p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
Sripathi Kodi | bda8e77 | 2010-03-25 12:45:30 +0000 | [diff] [blame] | 1920 | "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
| 1921 | "fsid %llu namelen %ld\n", |
| 1922 | fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, |
| 1923 | sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, |
| 1924 | sb->fsid, (long int)sb->namelen); |
| 1925 | |
| 1926 | p9_free_req(clnt, req); |
| 1927 | error: |
| 1928 | return err; |
| 1929 | } |
| 1930 | EXPORT_SYMBOL(p9_client_statfs); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1931 | |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1932 | int p9_client_rename(struct p9_fid *fid, |
| 1933 | struct p9_fid *newdirfid, const char *name) |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1934 | { |
| 1935 | int err; |
| 1936 | struct p9_req_t *req; |
| 1937 | struct p9_client *clnt; |
| 1938 | |
| 1939 | err = 0; |
| 1940 | clnt = fid->clnt; |
| 1941 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1942 | p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1943 | fid->fid, newdirfid->fid, name); |
| 1944 | |
| 1945 | req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, |
| 1946 | newdirfid->fid, name); |
| 1947 | if (IS_ERR(req)) { |
| 1948 | err = PTR_ERR(req); |
| 1949 | goto error; |
| 1950 | } |
| 1951 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1952 | p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1953 | |
| 1954 | p9_free_req(clnt, req); |
| 1955 | error: |
| 1956 | return err; |
| 1957 | } |
| 1958 | EXPORT_SYMBOL(p9_client_rename); |
| 1959 | |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1960 | int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, |
| 1961 | struct p9_fid *newdirfid, const char *new_name) |
| 1962 | { |
| 1963 | int err; |
| 1964 | struct p9_req_t *req; |
| 1965 | struct p9_client *clnt; |
| 1966 | |
| 1967 | err = 0; |
| 1968 | clnt = olddirfid->clnt; |
| 1969 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1970 | p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1971 | " newdirfid %d new name %s\n", olddirfid->fid, old_name, |
| 1972 | newdirfid->fid, new_name); |
| 1973 | |
| 1974 | req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, |
| 1975 | old_name, newdirfid->fid, new_name); |
| 1976 | if (IS_ERR(req)) { |
| 1977 | err = PTR_ERR(req); |
| 1978 | goto error; |
| 1979 | } |
| 1980 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1981 | p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s\n", |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 1982 | newdirfid->fid, new_name); |
| 1983 | |
| 1984 | p9_free_req(clnt, req); |
| 1985 | error: |
| 1986 | return err; |
| 1987 | } |
| 1988 | EXPORT_SYMBOL(p9_client_renameat); |
| 1989 | |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 1990 | /* |
| 1991 | * An xattrwalk without @attr_name gives the fid for the lisxattr namespace |
| 1992 | */ |
| 1993 | struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, |
| 1994 | const char *attr_name, u64 *attr_size) |
| 1995 | { |
| 1996 | int err; |
| 1997 | struct p9_req_t *req; |
| 1998 | struct p9_client *clnt; |
| 1999 | struct p9_fid *attr_fid; |
| 2000 | |
| 2001 | err = 0; |
| 2002 | clnt = file_fid->clnt; |
| 2003 | attr_fid = p9_fid_create(clnt); |
| 2004 | if (IS_ERR(attr_fid)) { |
| 2005 | err = PTR_ERR(attr_fid); |
| 2006 | attr_fid = NULL; |
| 2007 | goto error; |
| 2008 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2009 | p9_debug(P9_DEBUG_9P, |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 2010 | ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
| 2011 | file_fid->fid, attr_fid->fid, attr_name); |
| 2012 | |
| 2013 | req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", |
| 2014 | file_fid->fid, attr_fid->fid, attr_name); |
| 2015 | if (IS_ERR(req)) { |
| 2016 | err = PTR_ERR(req); |
| 2017 | goto error; |
| 2018 | } |
| 2019 | err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); |
| 2020 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2021 | trace_9p_protocol_dump(clnt, req->rc); |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 2022 | p9_free_req(clnt, req); |
| 2023 | goto clunk_fid; |
| 2024 | } |
| 2025 | p9_free_req(clnt, req); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2026 | p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
Aneesh Kumar K.V | 0ef63f3 | 2010-05-31 13:22:45 +0530 | [diff] [blame] | 2027 | attr_fid->fid, *attr_size); |
| 2028 | return attr_fid; |
| 2029 | clunk_fid: |
| 2030 | p9_client_clunk(attr_fid); |
| 2031 | attr_fid = NULL; |
| 2032 | error: |
| 2033 | if (attr_fid && (attr_fid != file_fid)) |
| 2034 | p9_fid_destroy(attr_fid); |
| 2035 | |
| 2036 | return ERR_PTR(err); |
| 2037 | } |
| 2038 | EXPORT_SYMBOL_GPL(p9_client_xattrwalk); |
| 2039 | |
Aneesh Kumar K.V | eda25e46 | 2010-05-31 13:22:50 +0530 | [diff] [blame] | 2040 | int p9_client_xattrcreate(struct p9_fid *fid, const char *name, |
| 2041 | u64 attr_size, int flags) |
| 2042 | { |
| 2043 | int err; |
| 2044 | struct p9_req_t *req; |
| 2045 | struct p9_client *clnt; |
| 2046 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2047 | p9_debug(P9_DEBUG_9P, |
Aneesh Kumar K.V | eda25e46 | 2010-05-31 13:22:50 +0530 | [diff] [blame] | 2048 | ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
| 2049 | fid->fid, name, (long long)attr_size, flags); |
| 2050 | err = 0; |
| 2051 | clnt = fid->clnt; |
| 2052 | req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", |
| 2053 | fid->fid, name, attr_size, flags); |
| 2054 | if (IS_ERR(req)) { |
| 2055 | err = PTR_ERR(req); |
| 2056 | goto error; |
| 2057 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2058 | p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
Aneesh Kumar K.V | eda25e46 | 2010-05-31 13:22:50 +0530 | [diff] [blame] | 2059 | p9_free_req(clnt, req); |
| 2060 | error: |
| 2061 | return err; |
| 2062 | } |
| 2063 | EXPORT_SYMBOL_GPL(p9_client_xattrcreate); |
| 2064 | |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2065 | int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
| 2066 | { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2067 | int err, rsize, non_zc = 0; |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2068 | struct p9_client *clnt; |
| 2069 | struct p9_req_t *req; |
| 2070 | char *dataptr; |
| 2071 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2072 | p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2073 | fid->fid, (unsigned long long) offset, count); |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2074 | |
| 2075 | err = 0; |
| 2076 | clnt = fid->clnt; |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2077 | |
| 2078 | rsize = fid->iounit; |
| 2079 | if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) |
| 2080 | rsize = clnt->msize - P9_READDIRHDRSZ; |
| 2081 | |
| 2082 | if (count < rsize) |
| 2083 | rsize = count; |
| 2084 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2085 | /* Don't bother zerocopy for small IO (< 1024) */ |
| 2086 | if (clnt->trans_mod->zc_request && rsize > 1024) { |
| 2087 | /* |
| 2088 | * response header len is 11 |
| 2089 | * PDU Header(7) + IO Size (4) |
| 2090 | */ |
| 2091 | req = p9_client_zc_rpc(clnt, P9_TREADDIR, data, NULL, rsize, 0, |
| 2092 | 11, 1, "dqd", fid->fid, offset, rsize); |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2093 | } else { |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2094 | non_zc = 1; |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2095 | req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2096 | offset, rsize); |
Venkateswararao Jujjuri (JV) | 2c66523 | 2011-02-16 18:43:20 -0800 | [diff] [blame] | 2097 | } |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2098 | if (IS_ERR(req)) { |
| 2099 | err = PTR_ERR(req); |
| 2100 | goto error; |
| 2101 | } |
| 2102 | |
| 2103 | err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
| 2104 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2105 | trace_9p_protocol_dump(clnt, req->rc); |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2106 | goto free_and_error; |
| 2107 | } |
| 2108 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2109 | p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2110 | |
Aneesh Kumar K.V | abfa034 | 2011-08-16 10:50:10 +0530 | [diff] [blame] | 2111 | if (non_zc) |
Sripathi Kodi | 7751bdb | 2010-06-04 13:41:26 +0000 | [diff] [blame] | 2112 | memmove(data, dataptr, count); |
| 2113 | |
| 2114 | p9_free_req(clnt, req); |
| 2115 | return count; |
| 2116 | |
| 2117 | free_and_error: |
| 2118 | p9_free_req(clnt, req); |
| 2119 | error: |
| 2120 | return err; |
| 2121 | } |
| 2122 | EXPORT_SYMBOL(p9_client_readdir); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2123 | |
| 2124 | int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 2125 | dev_t rdev, kgid_t gid, struct p9_qid *qid) |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2126 | { |
| 2127 | int err; |
| 2128 | struct p9_client *clnt; |
| 2129 | struct p9_req_t *req; |
| 2130 | |
| 2131 | err = 0; |
| 2132 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2133 | p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2134 | "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 2135 | req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2136 | MAJOR(rdev), MINOR(rdev), gid); |
| 2137 | if (IS_ERR(req)) |
| 2138 | return PTR_ERR(req); |
| 2139 | |
| 2140 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 2141 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2142 | trace_9p_protocol_dump(clnt, req->rc); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2143 | goto error; |
| 2144 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2145 | p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2146 | (unsigned long long)qid->path, qid->version); |
| 2147 | |
| 2148 | error: |
| 2149 | p9_free_req(clnt, req); |
| 2150 | return err; |
| 2151 | |
| 2152 | } |
| 2153 | EXPORT_SYMBOL(p9_client_mknod_dotl); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2154 | |
| 2155 | int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 2156 | kgid_t gid, struct p9_qid *qid) |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2157 | { |
| 2158 | int err; |
| 2159 | struct p9_client *clnt; |
| 2160 | struct p9_req_t *req; |
| 2161 | |
| 2162 | err = 0; |
| 2163 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2164 | p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 2165 | fid->fid, name, mode, from_kgid(&init_user_ns, gid)); |
| 2166 | req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2167 | gid); |
| 2168 | if (IS_ERR(req)) |
| 2169 | return PTR_ERR(req); |
| 2170 | |
| 2171 | err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| 2172 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2173 | trace_9p_protocol_dump(clnt, req->rc); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2174 | goto error; |
| 2175 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2176 | p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2177 | (unsigned long long)qid->path, qid->version); |
| 2178 | |
| 2179 | error: |
| 2180 | p9_free_req(clnt, req); |
| 2181 | return err; |
| 2182 | |
| 2183 | } |
| 2184 | EXPORT_SYMBOL(p9_client_mkdir_dotl); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2185 | |
| 2186 | int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) |
| 2187 | { |
| 2188 | int err; |
| 2189 | struct p9_client *clnt; |
| 2190 | struct p9_req_t *req; |
| 2191 | |
| 2192 | err = 0; |
| 2193 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2194 | p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2195 | "start %lld length %lld proc_id %d client_id %s\n", |
| 2196 | fid->fid, flock->type, flock->flags, flock->start, |
| 2197 | flock->length, flock->proc_id, flock->client_id); |
| 2198 | |
| 2199 | req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, |
| 2200 | flock->flags, flock->start, flock->length, |
| 2201 | flock->proc_id, flock->client_id); |
| 2202 | |
| 2203 | if (IS_ERR(req)) |
| 2204 | return PTR_ERR(req); |
| 2205 | |
| 2206 | err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); |
| 2207 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2208 | trace_9p_protocol_dump(clnt, req->rc); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2209 | goto error; |
| 2210 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2211 | p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 2212 | error: |
| 2213 | p9_free_req(clnt, req); |
| 2214 | return err; |
| 2215 | |
| 2216 | } |
| 2217 | EXPORT_SYMBOL(p9_client_lock_dotl); |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2218 | |
| 2219 | int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) |
| 2220 | { |
| 2221 | int err; |
| 2222 | struct p9_client *clnt; |
| 2223 | struct p9_req_t *req; |
| 2224 | |
| 2225 | err = 0; |
| 2226 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2227 | p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2228 | "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, |
| 2229 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 2230 | |
| 2231 | req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, |
| 2232 | glock->start, glock->length, glock->proc_id, glock->client_id); |
| 2233 | |
| 2234 | if (IS_ERR(req)) |
| 2235 | return PTR_ERR(req); |
| 2236 | |
| 2237 | err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, |
| 2238 | &glock->start, &glock->length, &glock->proc_id, |
| 2239 | &glock->client_id); |
| 2240 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2241 | trace_9p_protocol_dump(clnt, req->rc); |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2242 | goto error; |
| 2243 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2244 | p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
M. Mohan Kumar | 1d769cd | 2010-09-27 12:22:13 +0530 | [diff] [blame] | 2245 | "proc_id %d client_id %s\n", glock->type, glock->start, |
| 2246 | glock->length, glock->proc_id, glock->client_id); |
| 2247 | error: |
| 2248 | p9_free_req(clnt, req); |
| 2249 | return err; |
| 2250 | } |
| 2251 | EXPORT_SYMBOL(p9_client_getlock_dotl); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2252 | |
| 2253 | int p9_client_readlink(struct p9_fid *fid, char **target) |
| 2254 | { |
| 2255 | int err; |
| 2256 | struct p9_client *clnt; |
| 2257 | struct p9_req_t *req; |
| 2258 | |
| 2259 | err = 0; |
| 2260 | clnt = fid->clnt; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2261 | p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2262 | |
| 2263 | req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); |
| 2264 | if (IS_ERR(req)) |
| 2265 | return PTR_ERR(req); |
| 2266 | |
| 2267 | err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); |
| 2268 | if (err) { |
Aneesh Kumar K.V | 348b590 | 2011-08-07 00:46:59 +0530 | [diff] [blame] | 2269 | trace_9p_protocol_dump(clnt, req->rc); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2270 | goto error; |
| 2271 | } |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 2272 | p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 2273 | error: |
| 2274 | p9_free_req(clnt, req); |
| 2275 | return err; |
| 2276 | } |
| 2277 | EXPORT_SYMBOL(p9_client_readlink); |