Thomas Gleixner | 1f32761 | 2019-05-28 09:57:16 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 2 | /* |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 3 | * This file contains functions assisting in mapping VFS to 9P2000 |
| 4 | * |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 5 | * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 6 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 10 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 11 | #include <linux/module.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/fs.h> |
Al Viro | 914e263 | 2006-10-18 13:55:46 -0400 | [diff] [blame] | 14 | #include <linux/sched.h> |
Ingo Molnar | 5b825c3 | 2017-02-02 17:54:15 +0100 | [diff] [blame] | 15 | #include <linux/cred.h> |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 16 | #include <linux/parser.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 18 | #include <linux/seq_file.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 19 | #include <net/9p/9p.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 20 | #include <net/9p/client.h> |
Eric Van Hensbergen | 8b81ef5 | 2008-10-13 18:45:25 -0500 | [diff] [blame] | 21 | #include <net/9p/transport.h> |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 22 | #include "v9fs.h" |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 23 | #include "v9fs_vfs.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 24 | #include "cache.h" |
| 25 | |
| 26 | static DEFINE_SPINLOCK(v9fs_sessionlist_lock); |
| 27 | static LIST_HEAD(v9fs_sessionlist); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 28 | struct kmem_cache *v9fs_inode_cache; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 29 | |
| 30 | /* |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 31 | * Option Parsing (code inspired by NFS code) |
| 32 | * NOTE: each transport will parse its own options |
| 33 | */ |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 34 | |
| 35 | enum { |
| 36 | /* Options that take integer arguments */ |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 37 | Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 38 | /* String options */ |
Fabian Frederick | cb9af41 | 2015-06-05 19:09:35 +0200 | [diff] [blame] | 39 | Opt_uname, Opt_remotename, Opt_cache, Opt_cachetag, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 40 | /* Options that take no arguments */ |
Eric Van Hensbergen | 6deffc8 | 2022-12-18 20:34:45 +0000 | [diff] [blame] | 41 | Opt_nodevmap, Opt_noxattr, Opt_directio, Opt_ignoreqv, |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 42 | /* Access options */ |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 43 | Opt_access, Opt_posixacl, |
Dinu-Razvan Chis-Serban | 5e172f7 | 2018-09-05 16:44:12 +0900 | [diff] [blame] | 44 | /* Lock timeout option */ |
| 45 | Opt_locktimeout, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 46 | /* Error token */ |
| 47 | Opt_err |
| 48 | }; |
| 49 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 50 | static const match_table_t tokens = { |
Eric Van Hensbergen | 9e2f668 | 2007-07-13 13:05:21 -0500 | [diff] [blame] | 51 | {Opt_debug, "debug=%x"}, |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 52 | {Opt_dfltuid, "dfltuid=%u"}, |
| 53 | {Opt_dfltgid, "dfltgid=%u"}, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 54 | {Opt_afid, "afid=%u"}, |
Eric Van Hensbergen | 67543e5 | 2006-03-25 03:07:29 -0800 | [diff] [blame] | 55 | {Opt_uname, "uname=%s"}, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 56 | {Opt_remotename, "aname=%s"}, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 57 | {Opt_nodevmap, "nodevmap"}, |
Eric Van Hensbergen | 8142db4 | 2022-12-17 17:19:34 +0000 | [diff] [blame] | 58 | {Opt_noxattr, "noxattr"}, |
Eric Van Hensbergen | 6deffc8 | 2022-12-18 20:34:45 +0000 | [diff] [blame] | 59 | {Opt_directio, "directio"}, |
| 60 | {Opt_ignoreqv, "ignoreqv"}, |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 61 | {Opt_cache, "cache=%s"}, |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 62 | {Opt_cachetag, "cachetag=%s"}, |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 63 | {Opt_access, "access=%s"}, |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 64 | {Opt_posixacl, "posixacl"}, |
Dinu-Razvan Chis-Serban | 5e172f7 | 2018-09-05 16:44:12 +0900 | [diff] [blame] | 65 | {Opt_locktimeout, "locktimeout=%u"}, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 66 | {Opt_err, NULL} |
| 67 | }; |
| 68 | |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 69 | /* Interpret mount options for cache mode */ |
| 70 | static int get_cache_mode(char *s) |
| 71 | { |
| 72 | int version = -EINVAL; |
| 73 | |
| 74 | if (!strcmp(s, "loose")) { |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 75 | version = CACHE_SC_LOOSE; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 76 | p9_debug(P9_DEBUG_9P, "Cache mode: loose\n"); |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 77 | } else if (!strcmp(s, "fscache")) { |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 78 | version = CACHE_SC_FSCACHE; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 79 | p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n"); |
Dominique Martinet | fb89b45 | 2014-01-10 13:44:09 +0100 | [diff] [blame] | 80 | } else if (!strcmp(s, "mmap")) { |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 81 | version = CACHE_SC_MMAP; |
Dominique Martinet | fb89b45 | 2014-01-10 13:44:09 +0100 | [diff] [blame] | 82 | p9_debug(P9_DEBUG_9P, "Cache mode: mmap\n"); |
Eric Van Hensbergen | d9bc0d1 | 2022-12-08 02:40:37 +0000 | [diff] [blame] | 83 | } else if (!strcmp(s, "readahead")) { |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 84 | version = CACHE_SC_READAHEAD; |
Eric Van Hensbergen | d9bc0d1 | 2022-12-08 02:40:37 +0000 | [diff] [blame] | 85 | p9_debug(P9_DEBUG_9P, "Cache mode: readahead\n"); |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 86 | } else if (!strcmp(s, "none")) { |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 87 | version = CACHE_SC_NONE; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 88 | p9_debug(P9_DEBUG_9P, "Cache mode: none\n"); |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 89 | } else if (kstrtoint(s, 0, &version) != 0) { |
| 90 | version = -EINVAL; |
| 91 | pr_info("Unknown Cache mode or invalid value %s\n", s); |
| 92 | } |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 93 | return version; |
| 94 | } |
| 95 | |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 96 | /* |
| 97 | * Display the mount options in /proc/mounts. |
| 98 | */ |
| 99 | int v9fs_show_options(struct seq_file *m, struct dentry *root) |
| 100 | { |
| 101 | struct v9fs_session_info *v9ses = root->d_sb->s_fs_info; |
| 102 | |
| 103 | if (v9ses->debug) |
| 104 | seq_printf(m, ",debug=%x", v9ses->debug); |
| 105 | if (!uid_eq(v9ses->dfltuid, V9FS_DEFUID)) |
| 106 | seq_printf(m, ",dfltuid=%u", |
| 107 | from_kuid_munged(&init_user_ns, v9ses->dfltuid)); |
| 108 | if (!gid_eq(v9ses->dfltgid, V9FS_DEFGID)) |
| 109 | seq_printf(m, ",dfltgid=%u", |
| 110 | from_kgid_munged(&init_user_ns, v9ses->dfltgid)); |
| 111 | if (v9ses->afid != ~0) |
| 112 | seq_printf(m, ",afid=%u", v9ses->afid); |
| 113 | if (strcmp(v9ses->uname, V9FS_DEFUSER) != 0) |
| 114 | seq_printf(m, ",uname=%s", v9ses->uname); |
| 115 | if (strcmp(v9ses->aname, V9FS_DEFANAME) != 0) |
| 116 | seq_printf(m, ",aname=%s", v9ses->aname); |
| 117 | if (v9ses->nodev) |
| 118 | seq_puts(m, ",nodevmap"); |
| 119 | if (v9ses->cache) |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 120 | seq_printf(m, ",cache=%x", v9ses->cache); |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 121 | #ifdef CONFIG_9P_FSCACHE |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 122 | if (v9ses->cachetag && (v9ses->cache & CACHE_FSCACHE)) |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 123 | seq_printf(m, ",cachetag=%s", v9ses->cachetag); |
| 124 | #endif |
| 125 | |
| 126 | switch (v9ses->flags & V9FS_ACCESS_MASK) { |
| 127 | case V9FS_ACCESS_USER: |
| 128 | seq_puts(m, ",access=user"); |
| 129 | break; |
| 130 | case V9FS_ACCESS_ANY: |
| 131 | seq_puts(m, ",access=any"); |
| 132 | break; |
| 133 | case V9FS_ACCESS_CLIENT: |
| 134 | seq_puts(m, ",access=client"); |
| 135 | break; |
| 136 | case V9FS_ACCESS_SINGLE: |
| 137 | seq_printf(m, ",access=%u", |
| 138 | from_kuid_munged(&init_user_ns, v9ses->uid)); |
| 139 | break; |
| 140 | } |
| 141 | |
Eric Van Hensbergen | 6deffc8 | 2022-12-18 20:34:45 +0000 | [diff] [blame] | 142 | if (v9ses->flags & V9FS_IGNORE_QV) |
| 143 | seq_puts(m, ",ignoreqv"); |
| 144 | if (v9ses->flags & V9FS_DIRECT_IO) |
| 145 | seq_puts(m, ",directio"); |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 146 | if (v9ses->flags & V9FS_POSIX_ACL) |
| 147 | seq_puts(m, ",posixacl"); |
| 148 | |
Eric Van Hensbergen | 8142db4 | 2022-12-17 17:19:34 +0000 | [diff] [blame] | 149 | if (v9ses->flags & V9FS_NO_XATTR) |
| 150 | seq_puts(m, ",noxattr"); |
| 151 | |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 152 | return p9_show_client_options(m, v9ses->clnt); |
| 153 | } |
| 154 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 155 | /** |
| 156 | * v9fs_parse_options - parse mount options into session structure |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 157 | * @v9ses: existing v9fs session information |
David Howells | bc86803 | 2021-10-04 22:07:22 +0100 | [diff] [blame] | 158 | * @opts: The mount option string |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 159 | * |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 160 | * Return 0 upon success, -ERRNO upon failure. |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 161 | */ |
| 162 | |
Abhishek Kulkarni | 4b53e4b | 2009-08-17 16:42:28 -0500 | [diff] [blame] | 163 | static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 164 | { |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 165 | char *options, *tmp_options; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 166 | substring_t args[MAX_OPT_ARGS]; |
Eric Van Hensbergen | a80d923 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 167 | char *p; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 168 | int option = 0; |
Dominique Martinet | 10c69a0 | 2021-11-02 22:23:37 +0900 | [diff] [blame] | 169 | char *s; |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 170 | int ret = 0; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 171 | |
| 172 | /* setup defaults */ |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 173 | v9ses->afid = ~0; |
| 174 | v9ses->debug = 0; |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 175 | v9ses->cache = CACHE_NONE; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 176 | #ifdef CONFIG_9P_FSCACHE |
| 177 | v9ses->cachetag = NULL; |
| 178 | #endif |
Dinu-Razvan Chis-Serban | 5e172f7 | 2018-09-05 16:44:12 +0900 | [diff] [blame] | 179 | v9ses->session_lock_timeout = P9_LOCK_TIMEOUT; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 180 | |
Abhishek Kulkarni | 4b53e4b | 2009-08-17 16:42:28 -0500 | [diff] [blame] | 181 | if (!opts) |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 182 | return 0; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 183 | |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 184 | tmp_options = kstrdup(opts, GFP_KERNEL); |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 185 | if (!tmp_options) { |
| 186 | ret = -ENOMEM; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 187 | goto fail_option_alloc; |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 188 | } |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 189 | options = tmp_options; |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 190 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 191 | while ((p = strsep(&options, ",")) != NULL) { |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 192 | int token, r; |
Dominique Martinet | 6e195b0 | 2021-11-02 22:16:43 +0900 | [diff] [blame] | 193 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 194 | if (!*p) |
| 195 | continue; |
Dominique Martinet | 6e195b0 | 2021-11-02 22:16:43 +0900 | [diff] [blame] | 196 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 197 | token = match_token(p, tokens, args); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 198 | switch (token) { |
| 199 | case Opt_debug: |
| 200 | r = match_int(&args[0], &option); |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 201 | if (r < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 202 | p9_debug(P9_DEBUG_ERROR, |
| 203 | "integer field, but no integer?\n"); |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 204 | ret = r; |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 205 | } else { |
| 206 | v9ses->debug = option; |
Eric Van Hensbergen | 10fa16e | 2007-07-16 16:02:49 -0500 | [diff] [blame] | 207 | #ifdef CONFIG_NET_9P_DEBUG |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 208 | p9_debug_level = option; |
Eric Van Hensbergen | 10fa16e | 2007-07-16 16:02:49 -0500 | [diff] [blame] | 209 | #endif |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 210 | } |
Eric Van Hensbergen | 9e2f668 | 2007-07-13 13:05:21 -0500 | [diff] [blame] | 211 | break; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 212 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 213 | case Opt_dfltuid: |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 214 | r = match_int(&args[0], &option); |
| 215 | if (r < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 216 | p9_debug(P9_DEBUG_ERROR, |
| 217 | "integer field, but no integer?\n"); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 218 | ret = r; |
| 219 | continue; |
| 220 | } |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 221 | v9ses->dfltuid = make_kuid(current_user_ns(), option); |
| 222 | if (!uid_valid(v9ses->dfltuid)) { |
| 223 | p9_debug(P9_DEBUG_ERROR, |
| 224 | "uid field, but not a uid?\n"); |
| 225 | ret = -EINVAL; |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 226 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 227 | break; |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 228 | case Opt_dfltgid: |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 229 | r = match_int(&args[0], &option); |
| 230 | if (r < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 231 | p9_debug(P9_DEBUG_ERROR, |
| 232 | "integer field, but no integer?\n"); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 233 | ret = r; |
| 234 | continue; |
| 235 | } |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 236 | v9ses->dfltgid = make_kgid(current_user_ns(), option); |
| 237 | if (!gid_valid(v9ses->dfltgid)) { |
| 238 | p9_debug(P9_DEBUG_ERROR, |
| 239 | "gid field, but not a gid?\n"); |
| 240 | ret = -EINVAL; |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 241 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 242 | break; |
| 243 | case Opt_afid: |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 244 | r = match_int(&args[0], &option); |
| 245 | if (r < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 246 | p9_debug(P9_DEBUG_ERROR, |
| 247 | "integer field, but no integer?\n"); |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 248 | ret = r; |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 249 | } else { |
| 250 | v9ses->afid = option; |
Aneesh Kumar K.V | 4d5077f | 2011-08-30 12:19:34 +0530 | [diff] [blame] | 251 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 252 | break; |
Eric Van Hensbergen | 67543e5 | 2006-03-25 03:07:29 -0800 | [diff] [blame] | 253 | case Opt_uname: |
Jeff Layton | e549c13 | 2012-09-07 07:55:25 -0400 | [diff] [blame] | 254 | kfree(v9ses->uname); |
| 255 | v9ses->uname = match_strdup(&args[0]); |
| 256 | if (!v9ses->uname) { |
| 257 | ret = -ENOMEM; |
| 258 | goto free_and_return; |
| 259 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 260 | break; |
| 261 | case Opt_remotename: |
Jeff Layton | e549c13 | 2012-09-07 07:55:25 -0400 | [diff] [blame] | 262 | kfree(v9ses->aname); |
| 263 | v9ses->aname = match_strdup(&args[0]); |
| 264 | if (!v9ses->aname) { |
| 265 | ret = -ENOMEM; |
| 266 | goto free_and_return; |
| 267 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 268 | break; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 269 | case Opt_nodevmap: |
| 270 | v9ses->nodev = 1; |
| 271 | break; |
Eric Van Hensbergen | 8142db4 | 2022-12-17 17:19:34 +0000 | [diff] [blame] | 272 | case Opt_noxattr: |
| 273 | v9ses->flags |= V9FS_NO_XATTR; |
| 274 | break; |
Eric Van Hensbergen | 6deffc8 | 2022-12-18 20:34:45 +0000 | [diff] [blame] | 275 | case Opt_directio: |
| 276 | v9ses->flags |= V9FS_DIRECT_IO; |
| 277 | break; |
| 278 | case Opt_ignoreqv: |
| 279 | v9ses->flags |= V9FS_IGNORE_QV; |
| 280 | break; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 281 | case Opt_cachetag: |
| 282 | #ifdef CONFIG_9P_FSCACHE |
David Howells | c4fac91 | 2017-07-05 16:25:37 +0100 | [diff] [blame] | 283 | kfree(v9ses->cachetag); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 284 | v9ses->cachetag = match_strdup(&args[0]); |
Chengguang Xu | a25c365 | 2018-04-05 16:19:53 -0700 | [diff] [blame] | 285 | if (!v9ses->cachetag) { |
| 286 | ret = -ENOMEM; |
| 287 | goto free_and_return; |
| 288 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 289 | #endif |
| 290 | break; |
| 291 | case Opt_cache: |
| 292 | s = match_strdup(&args[0]); |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 293 | if (!s) { |
| 294 | ret = -ENOMEM; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 295 | p9_debug(P9_DEBUG_ERROR, |
| 296 | "problem allocating copy of cache arg\n"); |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 297 | goto free_and_return; |
| 298 | } |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 299 | r = get_cache_mode(s); |
| 300 | if (r < 0) |
| 301 | ret = r; |
| 302 | else |
| 303 | v9ses->cache = r; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 304 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 305 | kfree(s); |
| 306 | break; |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 307 | |
| 308 | case Opt_access: |
| 309 | s = match_strdup(&args[0]); |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 310 | if (!s) { |
| 311 | ret = -ENOMEM; |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 312 | p9_debug(P9_DEBUG_ERROR, |
| 313 | "problem allocating copy of access arg\n"); |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 314 | goto free_and_return; |
| 315 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 316 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 317 | v9ses->flags &= ~V9FS_ACCESS_MASK; |
| 318 | if (strcmp(s, "user") == 0) |
| 319 | v9ses->flags |= V9FS_ACCESS_USER; |
| 320 | else if (strcmp(s, "any") == 0) |
| 321 | v9ses->flags |= V9FS_ACCESS_ANY; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 322 | else if (strcmp(s, "client") == 0) { |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 323 | v9ses->flags |= V9FS_ACCESS_CLIENT; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 324 | } else { |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 325 | uid_t uid; |
Dominique Martinet | 10c69a0 | 2021-11-02 22:23:37 +0900 | [diff] [blame] | 326 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 327 | v9ses->flags |= V9FS_ACCESS_SINGLE; |
Dominique Martinet | 10c69a0 | 2021-11-02 22:23:37 +0900 | [diff] [blame] | 328 | r = kstrtouint(s, 10, &uid); |
| 329 | if (r) { |
| 330 | ret = r; |
| 331 | pr_info("Unknown access argument %s: %d\n", |
| 332 | s, r); |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 333 | kfree(s); |
Chengguang Xu | 478ae0c | 2018-06-07 17:05:07 -0700 | [diff] [blame] | 334 | continue; |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 335 | } |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 336 | v9ses->uid = make_kuid(current_user_ns(), uid); |
| 337 | if (!uid_valid(v9ses->uid)) { |
| 338 | ret = -EINVAL; |
Colin Ian King | 6baaac0 | 2018-07-17 19:14:49 -0700 | [diff] [blame] | 339 | pr_info("Unknown uid %s\n", s); |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 340 | } |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 341 | } |
Prem Karat | a2dd43b | 2011-05-06 18:24:18 +0530 | [diff] [blame] | 342 | |
Adrian Bunk | 0a97629 | 2007-10-23 13:48:50 -0500 | [diff] [blame] | 343 | kfree(s); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 344 | break; |
| 345 | |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 346 | case Opt_posixacl: |
| 347 | #ifdef CONFIG_9P_FS_POSIX_ACL |
| 348 | v9ses->flags |= V9FS_POSIX_ACL; |
| 349 | #else |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 350 | p9_debug(P9_DEBUG_ERROR, |
| 351 | "Not defined CONFIG_9P_FS_POSIX_ACL. Ignoring posixacl option\n"); |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 352 | #endif |
| 353 | break; |
| 354 | |
Dinu-Razvan Chis-Serban | 5e172f7 | 2018-09-05 16:44:12 +0900 | [diff] [blame] | 355 | case Opt_locktimeout: |
| 356 | r = match_int(&args[0], &option); |
| 357 | if (r < 0) { |
| 358 | p9_debug(P9_DEBUG_ERROR, |
| 359 | "integer field, but no integer?\n"); |
| 360 | ret = r; |
| 361 | continue; |
| 362 | } |
| 363 | if (option < 1) { |
| 364 | p9_debug(P9_DEBUG_ERROR, |
| 365 | "locktimeout must be a greater than zero integer.\n"); |
| 366 | ret = -EINVAL; |
| 367 | continue; |
| 368 | } |
| 369 | v9ses->session_lock_timeout = (long)option * HZ; |
| 370 | break; |
| 371 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 372 | default: |
| 373 | continue; |
| 374 | } |
| 375 | } |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 376 | |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 377 | free_and_return: |
Eric Van Hensbergen | d8c8a9e | 2010-02-08 16:23:23 -0600 | [diff] [blame] | 378 | kfree(tmp_options); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 379 | fail_option_alloc: |
Eric Van Hensbergen | bf2d29c | 2010-02-08 17:59:34 -0600 | [diff] [blame] | 380 | return ret; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | /** |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 384 | * v9fs_session_init - initialize session |
| 385 | * @v9ses: session information structure |
| 386 | * @dev_name: device being mounted |
| 387 | * @data: options |
| 388 | * |
| 389 | */ |
| 390 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 391 | struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 392 | const char *dev_name, char *data) |
| 393 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 394 | struct p9_fid *fid; |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 395 | int rc = -ENOMEM; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 396 | |
Jeff Layton | e549c13 | 2012-09-07 07:55:25 -0400 | [diff] [blame] | 397 | v9ses->uname = kstrdup(V9FS_DEFUSER, GFP_KERNEL); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 398 | if (!v9ses->uname) |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 399 | goto err_names; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 400 | |
Jeff Layton | e549c13 | 2012-09-07 07:55:25 -0400 | [diff] [blame] | 401 | v9ses->aname = kstrdup(V9FS_DEFANAME, GFP_KERNEL); |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 402 | if (!v9ses->aname) |
| 403 | goto err_names; |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 404 | init_rwsem(&v9ses->rename_sem); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 405 | |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 406 | v9ses->uid = INVALID_UID; |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 407 | v9ses->dfltuid = V9FS_DEFUID; |
| 408 | v9ses->dfltgid = V9FS_DEFGID; |
Jim Meyering | ab31267 | 2008-03-06 17:10:28 -0600 | [diff] [blame] | 409 | |
Abhishek Kulkarni | 4b53e4b | 2009-08-17 16:42:28 -0500 | [diff] [blame] | 410 | v9ses->clnt = p9_client_create(dev_name, data); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 411 | if (IS_ERR(v9ses->clnt)) { |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 412 | rc = PTR_ERR(v9ses->clnt); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 413 | p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n"); |
Jan Kara | 71304fe | 2017-04-12 12:24:31 +0200 | [diff] [blame] | 414 | goto err_names; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Venkateswararao Jujjuri (JV) | 6752a1e | 2011-01-26 16:20:35 -0800 | [diff] [blame] | 417 | v9ses->flags = V9FS_ACCESS_USER; |
| 418 | |
| 419 | if (p9_is_proto_dotl(v9ses->clnt)) { |
| 420 | v9ses->flags = V9FS_ACCESS_CLIENT; |
Sripathi Kodi | 476ada0 | 2010-03-17 17:02:38 +0000 | [diff] [blame] | 421 | v9ses->flags |= V9FS_PROTO_2000L; |
Venkateswararao Jujjuri (JV) | 6752a1e | 2011-01-26 16:20:35 -0800 | [diff] [blame] | 422 | } else if (p9_is_proto_dotu(v9ses->clnt)) { |
Sripathi Kodi | 476ada0 | 2010-03-17 17:02:38 +0000 | [diff] [blame] | 423 | v9ses->flags |= V9FS_PROTO_2000U; |
Venkateswararao Jujjuri (JV) | 6752a1e | 2011-01-26 16:20:35 -0800 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | rc = v9fs_parse_options(v9ses, data); |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 427 | if (rc < 0) |
| 428 | goto err_clnt; |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 429 | |
Eric Van Hensbergen | fbedadc | 2008-10-13 20:36:16 -0500 | [diff] [blame] | 430 | v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ; |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 431 | |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 432 | if (!v9fs_proto_dotl(v9ses) && |
| 433 | ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) { |
| 434 | /* |
| 435 | * We support ACCESS_CLIENT only for dotl. |
| 436 | * Fall back to ACCESS_USER |
| 437 | */ |
| 438 | v9ses->flags &= ~V9FS_ACCESS_MASK; |
| 439 | v9ses->flags |= V9FS_ACCESS_USER; |
| 440 | } |
| 441 | /*FIXME !! */ |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 442 | /* for legacy mode, fall back to V9FS_ACCESS_ANY */ |
Aneesh Kumar K.V | 9ffaf63 | 2010-06-01 09:26:18 +0000 | [diff] [blame] | 443 | if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) && |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 444 | ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) { |
| 445 | |
| 446 | v9ses->flags &= ~V9FS_ACCESS_MASK; |
| 447 | v9ses->flags |= V9FS_ACCESS_ANY; |
Eric W. Biederman | 76ed23a | 2013-01-30 11:57:40 -0800 | [diff] [blame] | 448 | v9ses->uid = INVALID_UID; |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 449 | } |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 450 | if (!v9fs_proto_dotl(v9ses) || |
| 451 | !((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) { |
| 452 | /* |
| 453 | * We support ACL checks on clinet only if the protocol is |
| 454 | * 9P2000.L and access is V9FS_ACCESS_CLIENT. |
| 455 | */ |
| 456 | v9ses->flags &= ~V9FS_ACL_MASK; |
| 457 | } |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 458 | |
Eric W. Biederman | f791f7c | 2013-01-29 16:09:41 -0800 | [diff] [blame] | 459 | fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, INVALID_UID, |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 460 | v9ses->aname); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 461 | if (IS_ERR(fid)) { |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 462 | rc = PTR_ERR(fid); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 463 | p9_debug(P9_DEBUG_ERROR, "cannot attach\n"); |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 464 | goto err_clnt; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 465 | } |
| 466 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 467 | if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE) |
| 468 | fid->uid = v9ses->uid; |
| 469 | else |
Eric W. Biederman | b464255 | 2013-01-30 11:48:53 -0800 | [diff] [blame] | 470 | fid->uid = INVALID_UID; |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 471 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 472 | #ifdef CONFIG_9P_FSCACHE |
| 473 | /* register the session for caching */ |
Eric Van Hensbergen | 4eb3117 | 2023-03-27 01:53:10 +0000 | [diff] [blame] | 474 | if (v9ses->cache & CACHE_FSCACHE) { |
David Howells | 24e42e3 | 2020-11-18 09:06:42 +0000 | [diff] [blame] | 475 | rc = v9fs_cache_session_get_cookie(v9ses, dev_name); |
| 476 | if (rc < 0) |
| 477 | goto err_clnt; |
| 478 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 479 | #endif |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 480 | spin_lock(&v9fs_sessionlist_lock); |
| 481 | list_add(&v9ses->slist, &v9fs_sessionlist); |
| 482 | spin_unlock(&v9fs_sessionlist_lock); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 483 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 484 | return fid; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 485 | |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 486 | err_clnt: |
Chengguang Xu | a25c365 | 2018-04-05 16:19:53 -0700 | [diff] [blame] | 487 | #ifdef CONFIG_9P_FSCACHE |
| 488 | kfree(v9ses->cachetag); |
| 489 | #endif |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 490 | p9_client_destroy(v9ses->clnt); |
Tejun Heo | 412a19b | 2015-06-08 14:57:31 +0900 | [diff] [blame] | 491 | err_names: |
| 492 | kfree(v9ses->uname); |
| 493 | kfree(v9ses->aname); |
| 494 | return ERR_PTR(rc); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /** |
| 498 | * v9fs_session_close - shutdown a session |
| 499 | * @v9ses: session information structure |
| 500 | * |
| 501 | */ |
| 502 | |
| 503 | void v9fs_session_close(struct v9fs_session_info *v9ses) |
| 504 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 505 | if (v9ses->clnt) { |
| 506 | p9_client_destroy(v9ses->clnt); |
| 507 | v9ses->clnt = NULL; |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 508 | } |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 509 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 510 | #ifdef CONFIG_9P_FSCACHE |
David Howells | 24e42e3 | 2020-11-18 09:06:42 +0000 | [diff] [blame] | 511 | fscache_relinquish_volume(v9fs_session_cache(v9ses), NULL, false); |
Zheng Bin | cb0aae0 | 2020-06-15 09:21:53 +0800 | [diff] [blame] | 512 | kfree(v9ses->cachetag); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 513 | #endif |
Jeff Layton | e549c13 | 2012-09-07 07:55:25 -0400 | [diff] [blame] | 514 | kfree(v9ses->uname); |
| 515 | kfree(v9ses->aname); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 516 | |
| 517 | spin_lock(&v9fs_sessionlist_lock); |
| 518 | list_del(&v9ses->slist); |
| 519 | spin_unlock(&v9fs_sessionlist_lock); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 520 | } |
| 521 | |
Eric Van Hensbergen | 322b329 | 2005-09-09 13:04:23 -0700 | [diff] [blame] | 522 | /** |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 523 | * v9fs_session_cancel - terminate a session |
| 524 | * @v9ses: session to terminate |
| 525 | * |
| 526 | * mark transport as disconnected and cancel all pending requests. |
Eric Van Hensbergen | 322b329 | 2005-09-09 13:04:23 -0700 | [diff] [blame] | 527 | */ |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 528 | |
Sohaib Mohamed | e4eeefb | 2021-10-01 08:24:54 +0200 | [diff] [blame] | 529 | void v9fs_session_cancel(struct v9fs_session_info *v9ses) |
| 530 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 531 | p9_debug(P9_DEBUG_ERROR, "cancel session %p\n", v9ses); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 532 | p9_client_disconnect(v9ses->clnt); |
Eric Van Hensbergen | 322b329 | 2005-09-09 13:04:23 -0700 | [diff] [blame] | 533 | } |
| 534 | |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 535 | /** |
| 536 | * v9fs_session_begin_cancel - Begin terminate of a session |
| 537 | * @v9ses: session to terminate |
| 538 | * |
| 539 | * After this call we don't allow any request other than clunk. |
| 540 | */ |
| 541 | |
| 542 | void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses) |
| 543 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 544 | p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses); |
Aneesh Kumar K.V | 6d96d3a | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 545 | p9_client_begin_disconnect(v9ses->clnt); |
| 546 | } |
| 547 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 548 | static struct kobject *v9fs_kobj; |
| 549 | |
| 550 | #ifdef CONFIG_9P_FSCACHE |
David Howells | bc86803 | 2021-10-04 22:07:22 +0100 | [diff] [blame] | 551 | /* |
| 552 | * List caches associated with a session |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 553 | */ |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 554 | static ssize_t caches_show(struct kobject *kobj, |
| 555 | struct kobj_attribute *attr, |
| 556 | char *buf) |
| 557 | { |
| 558 | ssize_t n = 0, count = 0, limit = PAGE_SIZE; |
| 559 | struct v9fs_session_info *v9ses; |
| 560 | |
| 561 | spin_lock(&v9fs_sessionlist_lock); |
| 562 | list_for_each_entry(v9ses, &v9fs_sessionlist, slist) { |
| 563 | if (v9ses->cachetag) { |
| 564 | n = snprintf(buf, limit, "%s\n", v9ses->cachetag); |
| 565 | if (n < 0) { |
| 566 | count = n; |
| 567 | break; |
| 568 | } |
| 569 | |
| 570 | count += n; |
| 571 | limit -= n; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | spin_unlock(&v9fs_sessionlist_lock); |
| 576 | return count; |
| 577 | } |
| 578 | |
| 579 | static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches); |
| 580 | #endif /* CONFIG_9P_FSCACHE */ |
| 581 | |
| 582 | static struct attribute *v9fs_attrs[] = { |
| 583 | #ifdef CONFIG_9P_FSCACHE |
| 584 | &v9fs_attr_cache.attr, |
| 585 | #endif |
| 586 | NULL, |
| 587 | }; |
| 588 | |
Rikard Falkeborn | 0dae522 | 2021-01-08 23:46:50 +0100 | [diff] [blame] | 589 | static const struct attribute_group v9fs_attr_group = { |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 590 | .attrs = v9fs_attrs, |
| 591 | }; |
| 592 | |
| 593 | /** |
| 594 | * v9fs_sysfs_init - Initialize the v9fs sysfs interface |
| 595 | * |
| 596 | */ |
| 597 | |
Fabian Frederick | bdbeacd | 2014-06-04 16:06:25 -0700 | [diff] [blame] | 598 | static int __init v9fs_sysfs_init(void) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 599 | { |
| 600 | v9fs_kobj = kobject_create_and_add("9p", fs_kobj); |
| 601 | if (!v9fs_kobj) |
| 602 | return -ENOMEM; |
| 603 | |
| 604 | if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) { |
| 605 | kobject_put(v9fs_kobj); |
| 606 | return -ENOMEM; |
| 607 | } |
| 608 | |
| 609 | return 0; |
| 610 | } |
| 611 | |
| 612 | /** |
| 613 | * v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface |
| 614 | * |
| 615 | */ |
| 616 | |
| 617 | static void v9fs_sysfs_cleanup(void) |
| 618 | { |
| 619 | sysfs_remove_group(v9fs_kobj, &v9fs_attr_group); |
| 620 | kobject_put(v9fs_kobj); |
| 621 | } |
| 622 | |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 623 | static void v9fs_inode_init_once(void *foo) |
| 624 | { |
| 625 | struct v9fs_inode *v9inode = (struct v9fs_inode *)foo; |
David Howells | bc899ee | 2021-06-29 22:37:05 +0100 | [diff] [blame] | 626 | |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 627 | memset(&v9inode->qid, 0, sizeof(v9inode->qid)); |
David Howells | 874c8ca1 | 2022-06-09 21:46:04 +0100 | [diff] [blame] | 628 | inode_init_once(&v9inode->netfs.inode); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /** |
| 632 | * v9fs_init_inode_cache - initialize a cache for 9P |
| 633 | * Returns 0 on success. |
| 634 | */ |
| 635 | static int v9fs_init_inode_cache(void) |
| 636 | { |
| 637 | v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache", |
| 638 | sizeof(struct v9fs_inode), |
| 639 | 0, (SLAB_RECLAIM_ACCOUNT| |
Linus Torvalds | f88c3fb | 2024-03-12 20:32:19 -0700 | [diff] [blame] | 640 | SLAB_ACCOUNT), |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 641 | v9fs_inode_init_once); |
| 642 | if (!v9fs_inode_cache) |
| 643 | return -ENOMEM; |
| 644 | |
| 645 | return 0; |
| 646 | } |
| 647 | |
| 648 | /** |
| 649 | * v9fs_destroy_inode_cache - destroy the cache of 9P inode |
| 650 | * |
| 651 | */ |
| 652 | static void v9fs_destroy_inode_cache(void) |
| 653 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 654 | /* |
| 655 | * Make sure all delayed rcu free inodes are flushed before we |
| 656 | * destroy cache. |
| 657 | */ |
| 658 | rcu_barrier(); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 659 | kmem_cache_destroy(v9fs_inode_cache); |
| 660 | } |
| 661 | |
| 662 | static int v9fs_cache_register(void) |
| 663 | { |
| 664 | int ret; |
Dominique Martinet | 6e195b0 | 2021-11-02 22:16:43 +0900 | [diff] [blame] | 665 | |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 666 | ret = v9fs_init_inode_cache(); |
| 667 | if (ret < 0) |
| 668 | return ret; |
Al Viro | 8061a6f | 2013-09-17 08:10:18 -0400 | [diff] [blame] | 669 | return ret; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | static void v9fs_cache_unregister(void) |
| 673 | { |
| 674 | v9fs_destroy_inode_cache(); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 675 | } |
| 676 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 677 | /** |
| 678 | * init_v9fs - Initialize module |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 679 | * |
| 680 | */ |
| 681 | |
| 682 | static int __init init_v9fs(void) |
| 683 | { |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 684 | int err; |
Dominique Martinet | 6e195b0 | 2021-11-02 22:16:43 +0900 | [diff] [blame] | 685 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 686 | pr_info("Installing v9fs 9p2000 file system support\n"); |
Eric Van Hensbergen | a80d923 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 687 | /* TODO: Setup list of registered trasnport modules */ |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 688 | |
| 689 | err = v9fs_cache_register(); |
| 690 | if (err < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 691 | pr_err("Failed to register v9fs for caching\n"); |
Al Viro | 2226a28 | 2012-03-17 02:37:05 -0400 | [diff] [blame] | 692 | return err; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 693 | } |
| 694 | |
| 695 | err = v9fs_sysfs_init(); |
| 696 | if (err < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 697 | pr_err("Failed to register with sysfs\n"); |
Al Viro | 2226a28 | 2012-03-17 02:37:05 -0400 | [diff] [blame] | 698 | goto out_cache; |
| 699 | } |
| 700 | err = register_filesystem(&v9fs_fs_type); |
| 701 | if (err < 0) { |
| 702 | pr_err("Failed to register filesystem\n"); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 703 | goto out_sysfs_cleanup; |
| 704 | } |
| 705 | |
| 706 | return 0; |
| 707 | |
| 708 | out_sysfs_cleanup: |
| 709 | v9fs_sysfs_cleanup(); |
| 710 | |
Al Viro | 2226a28 | 2012-03-17 02:37:05 -0400 | [diff] [blame] | 711 | out_cache: |
| 712 | v9fs_cache_unregister(); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 713 | |
| 714 | return err; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | /** |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 718 | * exit_v9fs - shutdown module |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 719 | * |
| 720 | */ |
| 721 | |
| 722 | static void __exit exit_v9fs(void) |
| 723 | { |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 724 | v9fs_sysfs_cleanup(); |
| 725 | v9fs_cache_unregister(); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 726 | unregister_filesystem(&v9fs_fs_type); |
| 727 | } |
| 728 | |
| 729 | module_init(init_v9fs) |
| 730 | module_exit(exit_v9fs) |
| 731 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 732 | MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 733 | MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); |
| 734 | MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); |
Dominique Martinet | e02be63 | 2023-10-26 07:27:52 +0900 | [diff] [blame] | 735 | MODULE_DESCRIPTION("9P Client File System"); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 736 | MODULE_LICENSE("GPL"); |