Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Syscall interface to knfsd. |
| 3 | * |
| 4 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 5 | */ |
| 6 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 7 | #include <linux/slab.h> |
Al Viro | 3f8206d | 2008-07-26 03:46:43 -0400 | [diff] [blame] | 8 | #include <linux/namei.h> |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 9 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 11 | #include <linux/sunrpc/svcsock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/nfsd/syscall.h> |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 13 | #include <linux/lockd/lockd.h> |
Chuck Lever | 4116092 | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 14 | #include <linux/sunrpc/clnt.h> |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 15 | #include <linux/sunrpc/gss_api.h> |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 16 | #include <linux/sunrpc/gss_krb5_enctypes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
J. Bruce Fields | 2ca72e1 | 2011-01-04 17:37:15 -0500 | [diff] [blame] | 18 | #include "idmap.h" |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 19 | #include "nfsd.h" |
| 20 | #include "cache.h" |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | /* |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 23 | * We have a single directory with several nodes in it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
| 25 | enum { |
| 26 | NFSD_Root = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | NFSD_List, |
J. Bruce Fields | e8e8753 | 2009-12-14 12:53:32 -0500 | [diff] [blame] | 28 | NFSD_Export_features, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | NFSD_Fh, |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 30 | NFSD_FO_UnlockIP, |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 31 | NFSD_FO_UnlockFS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | NFSD_Threads, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 33 | NFSD_Pool_Threads, |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 34 | NFSD_Pool_Stats, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 35 | NFSD_Versions, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 36 | NFSD_Ports, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 37 | NFSD_MaxBlkSize, |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 38 | NFSD_SupportedEnctypes, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 39 | /* |
| 40 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] |
| 41 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops |
| 42 | */ |
| 43 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | NFSD_Leasetime, |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 45 | NFSD_Gracetime, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 46 | NFSD_RecoveryDir, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 47 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | /* |
| 51 | * write() for these nodes. |
| 52 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
Chuck Lever | b046ccd | 2008-12-12 16:57:13 -0500 | [diff] [blame] | 54 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
| 55 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 57 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 58 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 59 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 60 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 61 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 63 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 64 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 65 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | [NFSD_Fh] = write_filehandle, |
Chuck Lever | b046ccd | 2008-12-12 16:57:13 -0500 | [diff] [blame] | 69 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
| 70 | [NFSD_FO_UnlockFS] = write_unlock_fs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | [NFSD_Threads] = write_threads, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 72 | [NFSD_Pool_Threads] = write_pool_threads, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 73 | [NFSD_Versions] = write_versions, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 74 | [NFSD_Ports] = write_ports, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 75 | [NFSD_MaxBlkSize] = write_maxblksize, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 76 | #ifdef CONFIG_NFSD_V4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | [NFSD_Leasetime] = write_leasetime, |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 78 | [NFSD_Gracetime] = write_gracetime, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 79 | [NFSD_RecoveryDir] = write_recoverydir, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 80 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | }; |
| 82 | |
| 83 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) |
| 84 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 85 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | char *data; |
| 87 | ssize_t rv; |
| 88 | |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 89 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | return -EINVAL; |
| 91 | |
| 92 | data = simple_transaction_get(file, buf, size); |
| 93 | if (IS_ERR(data)) |
| 94 | return PTR_ERR(data); |
| 95 | |
| 96 | rv = write_op[ino](file, data, size); |
NeilBrown | 8971a10 | 2007-02-14 00:33:11 -0800 | [diff] [blame] | 97 | if (rv >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | simple_transaction_set(file, rv); |
| 99 | rv = size; |
| 100 | } |
| 101 | return rv; |
| 102 | } |
| 103 | |
NeilBrown | 7390022 | 2005-11-07 01:00:24 -0800 | [diff] [blame] | 104 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
| 105 | { |
| 106 | if (! file->private_data) { |
| 107 | /* An attempt to read a transaction file without writing |
| 108 | * causes a 0-byte write so that the file can return |
| 109 | * state information |
| 110 | */ |
| 111 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); |
| 112 | if (rv < 0) |
| 113 | return rv; |
| 114 | } |
| 115 | return simple_transaction_read(file, buf, size, pos); |
| 116 | } |
| 117 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 118 | static const struct file_operations transaction_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | .write = nfsctl_transaction_write, |
NeilBrown | 7390022 | 2005-11-07 01:00:24 -0800 | [diff] [blame] | 120 | .read = nfsctl_transaction_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | .release = simple_transaction_release, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 122 | .llseek = default_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | }; |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | static int exports_open(struct inode *inode, struct file *file) |
| 126 | { |
| 127 | return seq_open(file, &nfs_exports_op); |
| 128 | } |
| 129 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 130 | static const struct file_operations exports_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | .open = exports_open, |
| 132 | .read = seq_read, |
| 133 | .llseek = seq_lseek, |
| 134 | .release = seq_release, |
Denis V. Lunev | 9ef2db2 | 2008-04-29 01:02:04 -0700 | [diff] [blame] | 135 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | }; |
| 137 | |
J. Bruce Fields | e8e8753 | 2009-12-14 12:53:32 -0500 | [diff] [blame] | 138 | static int export_features_show(struct seq_file *m, void *v) |
| 139 | { |
| 140 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int export_features_open(struct inode *inode, struct file *file) |
| 145 | { |
| 146 | return single_open(file, export_features_show, NULL); |
| 147 | } |
| 148 | |
| 149 | static struct file_operations export_features_operations = { |
| 150 | .open = export_features_open, |
| 151 | .read = seq_read, |
| 152 | .llseek = seq_lseek, |
| 153 | .release = single_release, |
| 154 | }; |
| 155 | |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 156 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 157 | static int supported_enctypes_show(struct seq_file *m, void *v) |
| 158 | { |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 159 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static int supported_enctypes_open(struct inode *inode, struct file *file) |
| 164 | { |
| 165 | return single_open(file, supported_enctypes_show, NULL); |
| 166 | } |
| 167 | |
| 168 | static struct file_operations supported_enctypes_ops = { |
| 169 | .open = supported_enctypes_open, |
| 170 | .read = seq_read, |
| 171 | .llseek = seq_lseek, |
| 172 | .release = single_release, |
| 173 | }; |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 174 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 175 | |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 176 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
Ryusei Yamaguchi | ed2d8ae | 2009-08-16 00:54:41 +0900 | [diff] [blame] | 177 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 178 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 179 | static const struct file_operations pool_stats_operations = { |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 180 | .open = nfsd_pool_stats_open, |
| 181 | .read = seq_read, |
| 182 | .llseek = seq_lseek, |
Ryusei Yamaguchi | ed2d8ae | 2009-08-16 00:54:41 +0900 | [diff] [blame] | 183 | .release = nfsd_pool_stats_release, |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 184 | .owner = THIS_MODULE, |
| 185 | }; |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | /*----------------------------------------------------------------------------*/ |
| 188 | /* |
| 189 | * payload - write methods |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | */ |
| 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 193 | /** |
| 194 | * write_unlock_ip - Release all locks used by a client |
| 195 | * |
| 196 | * Experimental. |
| 197 | * |
| 198 | * Input: |
| 199 | * buf: '\n'-terminated C string containing a |
Chuck Lever | 4116092 | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 200 | * presentation format IP address |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 201 | * size: length of C string in @buf |
| 202 | * Output: |
| 203 | * On success: returns zero if all specified locks were released; |
| 204 | * returns one if one or more locks were not released |
| 205 | * On error: return code is negative errno value |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 206 | */ |
Chuck Lever | b046ccd | 2008-12-12 16:57:13 -0500 | [diff] [blame] | 207 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 208 | { |
Chuck Lever | 4116092 | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 209 | struct sockaddr_storage address; |
| 210 | struct sockaddr *sap = (struct sockaddr *)&address; |
| 211 | size_t salen = sizeof(address); |
Chuck Lever | 367c8c7 | 2008-06-30 18:58:14 -0400 | [diff] [blame] | 212 | char *fo_path; |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 213 | |
| 214 | /* sanity check */ |
| 215 | if (size == 0) |
| 216 | return -EINVAL; |
| 217 | |
| 218 | if (buf[size-1] != '\n') |
| 219 | return -EINVAL; |
| 220 | |
| 221 | fo_path = buf; |
| 222 | if (qword_get(&buf, fo_path, size) < 0) |
| 223 | return -EINVAL; |
| 224 | |
Chuck Lever | 4116092 | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 225 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 226 | return -EINVAL; |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 227 | |
Chuck Lever | 4116092 | 2009-08-09 15:09:40 -0400 | [diff] [blame] | 228 | return nlmsvc_unlock_all_by_ip(sap); |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 229 | } |
| 230 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 231 | /** |
| 232 | * write_unlock_fs - Release all locks on a local file system |
| 233 | * |
| 234 | * Experimental. |
| 235 | * |
| 236 | * Input: |
| 237 | * buf: '\n'-terminated C string containing the |
| 238 | * absolute pathname of a local file system |
| 239 | * size: length of C string in @buf |
| 240 | * Output: |
| 241 | * On success: returns zero if all specified locks were released; |
| 242 | * returns one if one or more locks were not released |
| 243 | * On error: return code is negative errno value |
| 244 | */ |
Chuck Lever | b046ccd | 2008-12-12 16:57:13 -0500 | [diff] [blame] | 245 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 246 | { |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 247 | struct path path; |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 248 | char *fo_path; |
| 249 | int error; |
| 250 | |
| 251 | /* sanity check */ |
| 252 | if (size == 0) |
| 253 | return -EINVAL; |
| 254 | |
| 255 | if (buf[size-1] != '\n') |
| 256 | return -EINVAL; |
| 257 | |
| 258 | fo_path = buf; |
| 259 | if (qword_get(&buf, fo_path, size) < 0) |
| 260 | return -EINVAL; |
| 261 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 262 | error = kern_path(fo_path, 0, &path); |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 263 | if (error) |
| 264 | return error; |
| 265 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 266 | /* |
| 267 | * XXX: Needs better sanity checking. Otherwise we could end up |
| 268 | * releasing locks on the wrong file system. |
| 269 | * |
| 270 | * For example: |
| 271 | * 1. Does the path refer to a directory? |
| 272 | * 2. Is that directory a mount point, or |
| 273 | * 3. Is that directory the root of an exported file system? |
| 274 | */ |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 275 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 276 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 277 | path_put(&path); |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 278 | return error; |
| 279 | } |
| 280 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 281 | /** |
| 282 | * write_filehandle - Get a variable-length NFS file handle by path |
| 283 | * |
| 284 | * On input, the buffer contains a '\n'-terminated C string comprised of |
| 285 | * three alphanumeric words separated by whitespace. The string may |
| 286 | * contain escape sequences. |
| 287 | * |
| 288 | * Input: |
| 289 | * buf: |
| 290 | * domain: client domain name |
| 291 | * path: export pathname |
| 292 | * maxsize: numeric maximum size of |
| 293 | * @buf |
| 294 | * size: length of C string in @buf |
| 295 | * Output: |
| 296 | * On success: passed-in buffer filled with '\n'-terminated C |
| 297 | * string containing a ASCII hex text version |
| 298 | * of the NFS file handle; |
| 299 | * return code is the size in bytes of the string |
| 300 | * On error: return code is negative errno value |
| 301 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
| 303 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | char *dname, *path; |
Andrew Morton | 246d95b | 2007-08-09 00:53:50 -0700 | [diff] [blame] | 305 | int uninitialized_var(maxsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | char *mesg = buf; |
| 307 | int len; |
| 308 | struct auth_domain *dom; |
| 309 | struct knfsd_fh fh; |
| 310 | |
J. Bruce Fields | 87d26ea | 2008-01-22 17:40:42 -0500 | [diff] [blame] | 311 | if (size == 0) |
| 312 | return -EINVAL; |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (buf[size-1] != '\n') |
| 315 | return -EINVAL; |
| 316 | buf[size-1] = 0; |
| 317 | |
| 318 | dname = mesg; |
| 319 | len = qword_get(&mesg, dname, size); |
Chuck Lever | 54224f0 | 2008-12-12 16:57:20 -0500 | [diff] [blame] | 320 | if (len <= 0) |
| 321 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | path = dname+len+1; |
| 324 | len = qword_get(&mesg, path, size); |
Chuck Lever | 54224f0 | 2008-12-12 16:57:20 -0500 | [diff] [blame] | 325 | if (len <= 0) |
| 326 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | len = get_int(&mesg, &maxsize); |
| 329 | if (len) |
| 330 | return len; |
| 331 | |
| 332 | if (maxsize < NFS_FHSIZE) |
| 333 | return -EINVAL; |
| 334 | if (maxsize > NFS3_FHSIZE) |
| 335 | maxsize = NFS3_FHSIZE; |
| 336 | |
| 337 | if (qword_get(&mesg, mesg, size)>0) |
| 338 | return -EINVAL; |
| 339 | |
| 340 | /* we have all the words, they are in buf.. */ |
| 341 | dom = unix_domain_find(dname); |
| 342 | if (!dom) |
| 343 | return -ENOMEM; |
| 344 | |
| 345 | len = exp_rootfh(dom, path, &fh, maxsize); |
| 346 | auth_domain_put(dom); |
| 347 | if (len) |
| 348 | return len; |
| 349 | |
Chuck Lever | 54224f0 | 2008-12-12 16:57:20 -0500 | [diff] [blame] | 350 | mesg = buf; |
| 351 | len = SIMPLE_TRANSACTION_LIMIT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
| 353 | mesg[-1] = '\n'; |
| 354 | return mesg - buf; |
| 355 | } |
| 356 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 357 | /** |
| 358 | * write_threads - Start NFSD, or report the current number of running threads |
| 359 | * |
| 360 | * Input: |
| 361 | * buf: ignored |
| 362 | * size: zero |
| 363 | * Output: |
| 364 | * On success: passed-in buffer filled with '\n'-terminated C |
| 365 | * string numeric value representing the number of |
| 366 | * running NFSD threads; |
| 367 | * return code is the size in bytes of the string |
| 368 | * On error: return code is zero |
| 369 | * |
| 370 | * OR |
| 371 | * |
| 372 | * Input: |
| 373 | * buf: C string containing an unsigned |
| 374 | * integer value representing the |
| 375 | * number of NFSD threads to start |
| 376 | * size: non-zero length of C string in @buf |
| 377 | * Output: |
| 378 | * On success: NFS service is started; |
| 379 | * passed-in buffer filled with '\n'-terminated C |
| 380 | * string numeric value representing the number of |
| 381 | * running NFSD threads; |
| 382 | * return code is the size in bytes of the string |
| 383 | * On error: return code is zero or a negative errno value |
| 384 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
| 386 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | char *mesg = buf; |
| 388 | int rv; |
| 389 | if (size > 0) { |
| 390 | int newthreads; |
| 391 | rv = get_int(&mesg, &newthreads); |
| 392 | if (rv) |
| 393 | return rv; |
Chuck Lever | 9e07485 | 2008-12-12 16:57:27 -0500 | [diff] [blame] | 394 | if (newthreads < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | return -EINVAL; |
Chuck Lever | 9e07485 | 2008-12-12 16:57:27 -0500 | [diff] [blame] | 396 | rv = nfsd_svc(NFS_PORT, newthreads); |
NeilBrown | 82e12fe | 2009-06-16 11:03:07 +1000 | [diff] [blame] | 397 | if (rv < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | return rv; |
NeilBrown | 82e12fe | 2009-06-16 11:03:07 +1000 | [diff] [blame] | 399 | } else |
| 400 | rv = nfsd_nrthreads(); |
Chuck Lever | e06b640 | 2009-04-23 19:33:25 -0400 | [diff] [blame] | 401 | |
NeilBrown | 82e12fe | 2009-06-16 11:03:07 +1000 | [diff] [blame] | 402 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 405 | /** |
| 406 | * write_pool_threads - Set or report the current number of threads per pool |
| 407 | * |
| 408 | * Input: |
| 409 | * buf: ignored |
| 410 | * size: zero |
| 411 | * |
| 412 | * OR |
| 413 | * |
| 414 | * Input: |
| 415 | * buf: C string containing whitespace- |
| 416 | * separated unsigned integer values |
| 417 | * representing the number of NFSD |
| 418 | * threads to start in each pool |
| 419 | * size: non-zero length of C string in @buf |
| 420 | * Output: |
| 421 | * On success: passed-in buffer filled with '\n'-terminated C |
| 422 | * string containing integer values representing the |
| 423 | * number of NFSD threads in each pool; |
| 424 | * return code is the size in bytes of the string |
| 425 | * On error: return code is zero or a negative errno value |
| 426 | */ |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 427 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
| 428 | { |
| 429 | /* if size > 0, look for an array of number of threads per node |
| 430 | * and apply them then write out number of threads per node as reply |
| 431 | */ |
| 432 | char *mesg = buf; |
| 433 | int i; |
| 434 | int rv; |
| 435 | int len; |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 436 | int npools; |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 437 | int *nthreads; |
| 438 | |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 439 | mutex_lock(&nfsd_mutex); |
| 440 | npools = nfsd_nrpools(); |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 441 | if (npools == 0) { |
| 442 | /* |
| 443 | * NFS is shut down. The admin can start it by |
| 444 | * writing to the threads file but NOT the pool_threads |
| 445 | * file, sorry. Report zero threads. |
| 446 | */ |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 447 | mutex_unlock(&nfsd_mutex); |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 448 | strcpy(buf, "0\n"); |
| 449 | return strlen(buf); |
| 450 | } |
| 451 | |
| 452 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 453 | rv = -ENOMEM; |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 454 | if (nthreads == NULL) |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 455 | goto out_free; |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 456 | |
| 457 | if (size > 0) { |
| 458 | for (i = 0; i < npools; i++) { |
| 459 | rv = get_int(&mesg, &nthreads[i]); |
| 460 | if (rv == -ENOENT) |
| 461 | break; /* fewer numbers than pools */ |
| 462 | if (rv) |
| 463 | goto out_free; /* syntax error */ |
| 464 | rv = -EINVAL; |
| 465 | if (nthreads[i] < 0) |
| 466 | goto out_free; |
| 467 | } |
| 468 | rv = nfsd_set_nrthreads(i, nthreads); |
| 469 | if (rv) |
| 470 | goto out_free; |
| 471 | } |
| 472 | |
| 473 | rv = nfsd_get_nrthreads(npools, nthreads); |
| 474 | if (rv) |
| 475 | goto out_free; |
| 476 | |
| 477 | mesg = buf; |
| 478 | size = SIMPLE_TRANSACTION_LIMIT; |
| 479 | for (i = 0; i < npools && size > 0; i++) { |
| 480 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); |
| 481 | len = strlen(mesg); |
| 482 | size -= len; |
| 483 | mesg += len; |
| 484 | } |
J. Bruce Fields | 413d63d | 2009-07-28 11:37:25 -0400 | [diff] [blame] | 485 | rv = mesg - buf; |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 486 | out_free: |
| 487 | kfree(nthreads); |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 488 | mutex_unlock(&nfsd_mutex); |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 489 | return rv; |
| 490 | } |
| 491 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 492 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 493 | { |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 494 | char *mesg = buf; |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 495 | char *vers, *minorp, sign; |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 496 | int len, num, remaining; |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 497 | unsigned minor; |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 498 | ssize_t tlen = 0; |
| 499 | char *sep; |
| 500 | |
| 501 | if (size>0) { |
| 502 | if (nfsd_serv) |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 503 | /* Cannot change versions without updating |
| 504 | * nfsd_serv->sv_xdrsize, and reallocing |
| 505 | * rq_argp and rq_resp |
| 506 | */ |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 507 | return -EBUSY; |
| 508 | if (buf[size-1] != '\n') |
| 509 | return -EINVAL; |
| 510 | buf[size-1] = 0; |
| 511 | |
| 512 | vers = mesg; |
| 513 | len = qword_get(&mesg, vers, size); |
| 514 | if (len <= 0) return -EINVAL; |
| 515 | do { |
| 516 | sign = *vers; |
| 517 | if (sign == '+' || sign == '-') |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 518 | num = simple_strtol((vers+1), &minorp, 0); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 519 | else |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 520 | num = simple_strtol(vers, &minorp, 0); |
| 521 | if (*minorp == '.') { |
| 522 | if (num < 4) |
| 523 | return -EINVAL; |
| 524 | minor = simple_strtoul(minorp+1, NULL, 0); |
| 525 | if (minor == 0) |
| 526 | return -EINVAL; |
| 527 | if (nfsd_minorversion(minor, sign == '-' ? |
| 528 | NFSD_CLEAR : NFSD_SET) < 0) |
| 529 | return -EINVAL; |
| 530 | goto next; |
| 531 | } |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 532 | switch(num) { |
| 533 | case 2: |
| 534 | case 3: |
| 535 | case 4: |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 536 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 537 | break; |
| 538 | default: |
| 539 | return -EINVAL; |
| 540 | } |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 541 | next: |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 542 | vers += len + 1; |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 543 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
| 544 | /* If all get turned off, turn them back on, as |
| 545 | * having no versions is BAD |
| 546 | */ |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 547 | nfsd_reset_versions(); |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 548 | } |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 549 | |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 550 | /* Now write current state into reply buffer */ |
| 551 | len = 0; |
| 552 | sep = ""; |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 553 | remaining = SIMPLE_TRANSACTION_LIMIT; |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 554 | for (num=2 ; num <= 4 ; num++) |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 555 | if (nfsd_vers(num, NFSD_AVAIL)) { |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 556 | len = snprintf(buf, remaining, "%s%c%d", sep, |
NeilBrown | 6658d3a | 2006-10-02 02:17:46 -0700 | [diff] [blame] | 557 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 558 | num); |
| 559 | sep = " "; |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 560 | |
| 561 | if (len > remaining) |
| 562 | break; |
| 563 | remaining -= len; |
| 564 | buf += len; |
| 565 | tlen += len; |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 566 | } |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 567 | if (nfsd_vers(4, NFSD_AVAIL)) |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 568 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
| 569 | minor++) { |
| 570 | len = snprintf(buf, remaining, " %c4.%u", |
Benny Halevy | 8daf220 | 2009-04-03 08:28:59 +0300 | [diff] [blame] | 571 | (nfsd_vers(4, NFSD_TEST) && |
| 572 | nfsd_minorversion(minor, NFSD_TEST)) ? |
| 573 | '+' : '-', |
| 574 | minor); |
Chuck Lever | 261758b | 2009-04-23 19:33:18 -0400 | [diff] [blame] | 575 | |
| 576 | if (len > remaining) |
| 577 | break; |
| 578 | remaining -= len; |
| 579 | buf += len; |
| 580 | tlen += len; |
| 581 | } |
| 582 | |
| 583 | len = snprintf(buf, remaining, "\n"); |
| 584 | if (len > remaining) |
| 585 | return -EINVAL; |
| 586 | return tlen + len; |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 587 | } |
| 588 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 589 | /** |
| 590 | * write_versions - Set or report the available NFS protocol versions |
| 591 | * |
| 592 | * Input: |
| 593 | * buf: ignored |
| 594 | * size: zero |
| 595 | * Output: |
| 596 | * On success: passed-in buffer filled with '\n'-terminated C |
| 597 | * string containing positive or negative integer |
| 598 | * values representing the current status of each |
| 599 | * protocol version; |
| 600 | * return code is the size in bytes of the string |
| 601 | * On error: return code is zero or a negative errno value |
| 602 | * |
| 603 | * OR |
| 604 | * |
| 605 | * Input: |
| 606 | * buf: C string containing whitespace- |
| 607 | * separated positive or negative |
| 608 | * integer values representing NFS |
| 609 | * protocol versions to enable ("+n") |
| 610 | * or disable ("-n") |
| 611 | * size: non-zero length of C string in @buf |
| 612 | * Output: |
| 613 | * On success: status of zero or more protocol versions has |
| 614 | * been updated; passed-in buffer filled with |
| 615 | * '\n'-terminated C string containing positive |
| 616 | * or negative integer values representing the |
| 617 | * current status of each protocol version; |
| 618 | * return code is the size in bytes of the string |
| 619 | * On error: return code is zero or a negative errno value |
| 620 | */ |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 621 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
| 622 | { |
| 623 | ssize_t rv; |
| 624 | |
| 625 | mutex_lock(&nfsd_mutex); |
| 626 | rv = __write_versions(file, buf, size); |
| 627 | mutex_unlock(&nfsd_mutex); |
| 628 | return rv; |
| 629 | } |
| 630 | |
Chuck Lever | 4cd5dc7 | 2009-04-23 19:31:32 -0400 | [diff] [blame] | 631 | /* |
Chuck Lever | 0a5372d | 2009-04-23 19:32:10 -0400 | [diff] [blame] | 632 | * Zero-length write. Return a list of NFSD's current listener |
| 633 | * transports. |
| 634 | */ |
| 635 | static ssize_t __write_ports_names(char *buf) |
| 636 | { |
| 637 | if (nfsd_serv == NULL) |
| 638 | return 0; |
Chuck Lever | 335c54b | 2009-04-23 19:32:25 -0400 | [diff] [blame] | 639 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
Chuck Lever | 0a5372d | 2009-04-23 19:32:10 -0400 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | /* |
Chuck Lever | 0b7c2f6 | 2009-04-23 19:31:55 -0400 | [diff] [blame] | 643 | * A single 'fd' number was written, in which case it must be for |
| 644 | * a socket of a supported family/protocol, and we use it as an |
| 645 | * nfsd listener. |
| 646 | */ |
| 647 | static ssize_t __write_ports_addfd(char *buf) |
| 648 | { |
| 649 | char *mesg = buf; |
| 650 | int fd, err; |
| 651 | |
| 652 | err = get_int(&mesg, &fd); |
| 653 | if (err != 0 || fd < 0) |
| 654 | return -EINVAL; |
| 655 | |
| 656 | err = nfsd_create_serv(); |
| 657 | if (err != 0) |
| 658 | return err; |
| 659 | |
Chuck Lever | bfba9ab | 2009-04-23 19:32:33 -0400 | [diff] [blame] | 660 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
Jeff Layton | 78a8d7c | 2010-07-19 16:50:05 -0400 | [diff] [blame] | 661 | if (err < 0) { |
Jeff Layton | 78a8d7c | 2010-07-19 16:50:05 -0400 | [diff] [blame] | 662 | svc_destroy(nfsd_serv); |
| 663 | return err; |
| 664 | } |
Chuck Lever | 0b7c2f6 | 2009-04-23 19:31:55 -0400 | [diff] [blame] | 665 | |
Chuck Lever | ea068ba | 2009-04-23 19:32:18 -0400 | [diff] [blame] | 666 | /* Decrease the count, but don't shut down the service */ |
| 667 | nfsd_serv->sv_nrthreads--; |
| 668 | return err; |
Chuck Lever | 0b7c2f6 | 2009-04-23 19:31:55 -0400 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | /* |
Chuck Lever | 82d5659 | 2009-04-23 19:31:48 -0400 | [diff] [blame] | 672 | * A '-' followed by the 'name' of a socket means we close the socket. |
| 673 | */ |
| 674 | static ssize_t __write_ports_delfd(char *buf) |
| 675 | { |
| 676 | char *toclose; |
| 677 | int len = 0; |
| 678 | |
| 679 | toclose = kstrdup(buf + 1, GFP_KERNEL); |
| 680 | if (toclose == NULL) |
| 681 | return -ENOMEM; |
| 682 | |
| 683 | if (nfsd_serv != NULL) |
Chuck Lever | 8435d34 | 2009-04-23 19:32:40 -0400 | [diff] [blame] | 684 | len = svc_sock_names(nfsd_serv, buf, |
| 685 | SIMPLE_TRANSACTION_LIMIT, toclose); |
Chuck Lever | 82d5659 | 2009-04-23 19:31:48 -0400 | [diff] [blame] | 686 | kfree(toclose); |
| 687 | return len; |
| 688 | } |
| 689 | |
| 690 | /* |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 691 | * A transport listener is added by writing it's transport name and |
| 692 | * a port number. |
| 693 | */ |
| 694 | static ssize_t __write_ports_addxprt(char *buf) |
| 695 | { |
| 696 | char transport[16]; |
Chuck Lever | 3749829 | 2010-01-26 14:04:22 -0500 | [diff] [blame] | 697 | struct svc_xprt *xprt; |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 698 | int port, err; |
| 699 | |
| 700 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) |
| 701 | return -EINVAL; |
| 702 | |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 703 | if (port < 1 || port > USHRT_MAX) |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 704 | return -EINVAL; |
| 705 | |
| 706 | err = nfsd_create_serv(); |
| 707 | if (err != 0) |
| 708 | return err; |
| 709 | |
Pavel Emelyanov | fc5d00b | 2010-09-29 16:03:50 +0400 | [diff] [blame] | 710 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 711 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
Chuck Lever | 6871790 | 2010-01-26 14:04:13 -0500 | [diff] [blame] | 712 | if (err < 0) |
Chuck Lever | 3749829 | 2010-01-26 14:04:22 -0500 | [diff] [blame] | 713 | goto out_err; |
| 714 | |
Pavel Emelyanov | fc5d00b | 2010-09-29 16:03:50 +0400 | [diff] [blame] | 715 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
Chuck Lever | 3749829 | 2010-01-26 14:04:22 -0500 | [diff] [blame] | 716 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
| 717 | if (err < 0 && err != -EAFNOSUPPORT) |
| 718 | goto out_close; |
Jeff Layton | 0cd14a0 | 2010-07-19 16:50:06 -0400 | [diff] [blame] | 719 | |
| 720 | /* Decrease the count, but don't shut down the service */ |
| 721 | nfsd_serv->sv_nrthreads--; |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 722 | return 0; |
Chuck Lever | 3749829 | 2010-01-26 14:04:22 -0500 | [diff] [blame] | 723 | out_close: |
| 724 | xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); |
| 725 | if (xprt != NULL) { |
| 726 | svc_close_xprt(xprt); |
| 727 | svc_xprt_put(xprt); |
| 728 | } |
| 729 | out_err: |
Jeff Layton | 0cd14a0 | 2010-07-19 16:50:06 -0400 | [diff] [blame] | 730 | svc_destroy(nfsd_serv); |
Chuck Lever | 3749829 | 2010-01-26 14:04:22 -0500 | [diff] [blame] | 731 | return err; |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | /* |
Chuck Lever | 4cd5dc7 | 2009-04-23 19:31:32 -0400 | [diff] [blame] | 735 | * A transport listener is removed by writing a "-", it's transport |
| 736 | * name, and it's port number. |
| 737 | */ |
| 738 | static ssize_t __write_ports_delxprt(char *buf) |
| 739 | { |
| 740 | struct svc_xprt *xprt; |
| 741 | char transport[16]; |
| 742 | int port; |
| 743 | |
| 744 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) |
| 745 | return -EINVAL; |
| 746 | |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 747 | if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) |
Chuck Lever | 4cd5dc7 | 2009-04-23 19:31:32 -0400 | [diff] [blame] | 748 | return -EINVAL; |
| 749 | |
| 750 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); |
| 751 | if (xprt == NULL) |
| 752 | return -ENOTCONN; |
| 753 | |
| 754 | svc_close_xprt(xprt); |
| 755 | svc_xprt_put(xprt); |
| 756 | return 0; |
| 757 | } |
| 758 | |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 759 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 760 | { |
Chuck Lever | 0a5372d | 2009-04-23 19:32:10 -0400 | [diff] [blame] | 761 | if (size == 0) |
| 762 | return __write_ports_names(buf); |
Chuck Lever | 0b7c2f6 | 2009-04-23 19:31:55 -0400 | [diff] [blame] | 763 | |
| 764 | if (isdigit(buf[0])) |
| 765 | return __write_ports_addfd(buf); |
Chuck Lever | 82d5659 | 2009-04-23 19:31:48 -0400 | [diff] [blame] | 766 | |
| 767 | if (buf[0] == '-' && isdigit(buf[1])) |
| 768 | return __write_ports_delfd(buf); |
Chuck Lever | 4eb68c2 | 2009-04-23 19:31:40 -0400 | [diff] [blame] | 769 | |
| 770 | if (isalpha(buf[0])) |
| 771 | return __write_ports_addxprt(buf); |
Chuck Lever | 4cd5dc7 | 2009-04-23 19:31:32 -0400 | [diff] [blame] | 772 | |
| 773 | if (buf[0] == '-' && isalpha(buf[1])) |
| 774 | return __write_ports_delxprt(buf); |
| 775 | |
NeilBrown | b41b66d | 2006-10-02 02:17:48 -0700 | [diff] [blame] | 776 | return -EINVAL; |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 777 | } |
| 778 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 779 | /** |
| 780 | * write_ports - Pass a socket file descriptor or transport name to listen on |
| 781 | * |
| 782 | * Input: |
| 783 | * buf: ignored |
| 784 | * size: zero |
| 785 | * Output: |
| 786 | * On success: passed-in buffer filled with a '\n'-terminated C |
| 787 | * string containing a whitespace-separated list of |
| 788 | * named NFSD listeners; |
| 789 | * return code is the size in bytes of the string |
| 790 | * On error: return code is zero or a negative errno value |
| 791 | * |
| 792 | * OR |
| 793 | * |
| 794 | * Input: |
| 795 | * buf: C string containing an unsigned |
| 796 | * integer value representing a bound |
| 797 | * but unconnected socket that is to be |
Chuck Lever | c71206a | 2009-04-23 19:32:03 -0400 | [diff] [blame] | 798 | * used as an NFSD listener; listen(3) |
| 799 | * must be called for a SOCK_STREAM |
| 800 | * socket, otherwise it is ignored |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 801 | * size: non-zero length of C string in @buf |
| 802 | * Output: |
| 803 | * On success: NFS service is started; |
| 804 | * passed-in buffer filled with a '\n'-terminated C |
| 805 | * string containing a unique alphanumeric name of |
| 806 | * the listener; |
| 807 | * return code is the size in bytes of the string |
| 808 | * On error: return code is a negative errno value |
| 809 | * |
| 810 | * OR |
| 811 | * |
| 812 | * Input: |
| 813 | * buf: C string containing a "-" followed |
| 814 | * by an integer value representing a |
| 815 | * previously passed in socket file |
| 816 | * descriptor |
| 817 | * size: non-zero length of C string in @buf |
| 818 | * Output: |
| 819 | * On success: NFS service no longer listens on that socket; |
| 820 | * passed-in buffer filled with a '\n'-terminated C |
| 821 | * string containing a unique name of the listener; |
| 822 | * return code is the size in bytes of the string |
| 823 | * On error: return code is a negative errno value |
| 824 | * |
| 825 | * OR |
| 826 | * |
| 827 | * Input: |
| 828 | * buf: C string containing a transport |
| 829 | * name and an unsigned integer value |
| 830 | * representing the port to listen on, |
| 831 | * separated by whitespace |
| 832 | * size: non-zero length of C string in @buf |
| 833 | * Output: |
| 834 | * On success: returns zero; NFS service is started |
| 835 | * On error: return code is a negative errno value |
| 836 | * |
| 837 | * OR |
| 838 | * |
| 839 | * Input: |
| 840 | * buf: C string containing a "-" followed |
| 841 | * by a transport name and an unsigned |
| 842 | * integer value representing the port |
| 843 | * to listen on, separated by whitespace |
| 844 | * size: non-zero length of C string in @buf |
| 845 | * Output: |
| 846 | * On success: returns zero; NFS service no longer listens |
| 847 | * on that transport |
| 848 | * On error: return code is a negative errno value |
| 849 | */ |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 850 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
| 851 | { |
| 852 | ssize_t rv; |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 853 | |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 854 | mutex_lock(&nfsd_mutex); |
| 855 | rv = __write_ports(file, buf, size); |
| 856 | mutex_unlock(&nfsd_mutex); |
| 857 | return rv; |
| 858 | } |
| 859 | |
| 860 | |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 861 | int nfsd_max_blksize; |
| 862 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 863 | /** |
| 864 | * write_maxblksize - Set or report the current NFS blksize |
| 865 | * |
| 866 | * Input: |
| 867 | * buf: ignored |
| 868 | * size: zero |
| 869 | * |
| 870 | * OR |
| 871 | * |
| 872 | * Input: |
| 873 | * buf: C string containing an unsigned |
| 874 | * integer value representing the new |
| 875 | * NFS blksize |
| 876 | * size: non-zero length of C string in @buf |
| 877 | * Output: |
| 878 | * On success: passed-in buffer filled with '\n'-terminated C string |
| 879 | * containing numeric value of the current NFS blksize |
| 880 | * setting; |
| 881 | * return code is the size in bytes of the string |
| 882 | * On error: return code is zero or a negative errno value |
| 883 | */ |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 884 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
| 885 | { |
| 886 | char *mesg = buf; |
| 887 | if (size > 0) { |
| 888 | int bsize; |
| 889 | int rv = get_int(&mesg, &bsize); |
| 890 | if (rv) |
| 891 | return rv; |
| 892 | /* force bsize into allowed range and |
| 893 | * required alignment. |
| 894 | */ |
| 895 | if (bsize < 1024) |
| 896 | bsize = 1024; |
| 897 | if (bsize > NFSSVC_MAXBLKSIZE) |
| 898 | bsize = NFSSVC_MAXBLKSIZE; |
| 899 | bsize &= ~(1024-1); |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 900 | mutex_lock(&nfsd_mutex); |
J. Bruce Fields | 7fa53cc | 2010-08-06 18:00:33 -0400 | [diff] [blame] | 901 | if (nfsd_serv) { |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 902 | mutex_unlock(&nfsd_mutex); |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 903 | return -EBUSY; |
| 904 | } |
| 905 | nfsd_max_blksize = bsize; |
Neil Brown | bedbdd8 | 2008-06-10 08:40:35 -0400 | [diff] [blame] | 906 | mutex_unlock(&nfsd_mutex); |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 907 | } |
Chuck Lever | e06b640 | 2009-04-23 19:33:25 -0400 | [diff] [blame] | 908 | |
| 909 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", |
| 910 | nfsd_max_blksize); |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 911 | } |
| 912 | |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 913 | #ifdef CONFIG_NFSD_V4 |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 914 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | char *mesg = buf; |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 917 | int rv, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
| 919 | if (size > 0) { |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 920 | if (nfsd_serv) |
| 921 | return -EBUSY; |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 922 | rv = get_int(&mesg, &i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | if (rv) |
| 924 | return rv; |
J. Bruce Fields | e7b184f | 2010-03-02 11:18:40 -0500 | [diff] [blame] | 925 | /* |
| 926 | * Some sanity checking. We don't have a reason for |
| 927 | * these particular numbers, but problems with the |
| 928 | * extremes are: |
| 929 | * - Too short: the briefest network outage may |
| 930 | * cause clients to lose all their locks. Also, |
| 931 | * the frequent polling may be wasteful. |
| 932 | * - Too long: do you really want reboot recovery |
| 933 | * to take more than an hour? Or to make other |
| 934 | * clients wait an hour before being able to |
| 935 | * revoke a dead client's locks? |
| 936 | */ |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 937 | if (i < 10 || i > 3600) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return -EINVAL; |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 939 | *time = i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | } |
Chuck Lever | e06b640 | 2009-04-23 19:33:25 -0400 | [diff] [blame] | 941 | |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 942 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
| 943 | } |
| 944 | |
| 945 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) |
| 946 | { |
| 947 | ssize_t rv; |
| 948 | |
| 949 | mutex_lock(&nfsd_mutex); |
| 950 | rv = __nfsd4_write_time(file, buf, size, time); |
| 951 | mutex_unlock(&nfsd_mutex); |
| 952 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 955 | /** |
| 956 | * write_leasetime - Set or report the current NFSv4 lease time |
| 957 | * |
| 958 | * Input: |
| 959 | * buf: ignored |
| 960 | * size: zero |
| 961 | * |
| 962 | * OR |
| 963 | * |
| 964 | * Input: |
| 965 | * buf: C string containing an unsigned |
| 966 | * integer value representing the new |
| 967 | * NFSv4 lease expiry time |
| 968 | * size: non-zero length of C string in @buf |
| 969 | * Output: |
| 970 | * On success: passed-in buffer filled with '\n'-terminated C |
| 971 | * string containing unsigned integer value of the |
| 972 | * current lease expiry time; |
| 973 | * return code is the size in bytes of the string |
| 974 | * On error: return code is zero or a negative errno value |
| 975 | */ |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 976 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
| 977 | { |
J. Bruce Fields | f013574 | 2010-03-01 19:32:36 -0500 | [diff] [blame] | 978 | return nfsd4_write_time(file, buf, size, &nfsd4_lease); |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 979 | } |
| 980 | |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 981 | /** |
| 982 | * write_gracetime - Set or report current NFSv4 grace period time |
| 983 | * |
| 984 | * As above, but sets the time of the NFSv4 grace period. |
| 985 | * |
| 986 | * Note this should never be set to less than the *previous* |
| 987 | * lease-period time, but we don't try to enforce this. (In the common |
| 988 | * case (a new boot), we don't know what the previous lease time was |
| 989 | * anyway.) |
| 990 | */ |
| 991 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) |
| 992 | { |
| 993 | return nfsd4_write_time(file, buf, size, &nfsd4_grace); |
| 994 | } |
| 995 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 996 | extern char *nfs4_recoverydir(void); |
| 997 | |
| 998 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 999 | { |
| 1000 | char *mesg = buf; |
| 1001 | char *recdir; |
| 1002 | int len, status; |
| 1003 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1004 | if (size > 0) { |
| 1005 | if (nfsd_serv) |
| 1006 | return -EBUSY; |
| 1007 | if (size > PATH_MAX || buf[size-1] != '\n') |
| 1008 | return -EINVAL; |
| 1009 | buf[size-1] = 0; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 1010 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1011 | recdir = mesg; |
| 1012 | len = qword_get(&mesg, recdir, size); |
| 1013 | if (len <= 0) |
| 1014 | return -EINVAL; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 1015 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1016 | status = nfs4_reset_recoverydir(recdir); |
Andi Kleen | 6904996 | 2010-07-20 15:24:27 -0700 | [diff] [blame] | 1017 | if (status) |
| 1018 | return status; |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1019 | } |
Chuck Lever | 3d72ab8 | 2009-04-23 19:33:10 -0400 | [diff] [blame] | 1020 | |
| 1021 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", |
| 1022 | nfs4_recoverydir()); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 1023 | } |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1024 | |
Chuck Lever | 262a098 | 2008-12-12 16:57:35 -0500 | [diff] [blame] | 1025 | /** |
| 1026 | * write_recoverydir - Set or report the pathname of the recovery directory |
| 1027 | * |
| 1028 | * Input: |
| 1029 | * buf: ignored |
| 1030 | * size: zero |
| 1031 | * |
| 1032 | * OR |
| 1033 | * |
| 1034 | * Input: |
| 1035 | * buf: C string containing the pathname |
| 1036 | * of the directory on a local file |
| 1037 | * system containing permanent NFSv4 |
| 1038 | * recovery data |
| 1039 | * size: non-zero length of C string in @buf |
| 1040 | * Output: |
| 1041 | * On success: passed-in buffer filled with '\n'-terminated C string |
| 1042 | * containing the current recovery pathname setting; |
| 1043 | * return code is the size in bytes of the string |
| 1044 | * On error: return code is zero or a negative errno value |
| 1045 | */ |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 1046 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
| 1047 | { |
| 1048 | ssize_t rv; |
| 1049 | |
| 1050 | mutex_lock(&nfsd_mutex); |
| 1051 | rv = __write_recoverydir(file, buf, size); |
| 1052 | mutex_unlock(&nfsd_mutex); |
| 1053 | return rv; |
| 1054 | } |
| 1055 | |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 1056 | #endif |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 1057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | /*----------------------------------------------------------------------------*/ |
| 1059 | /* |
| 1060 | * populating the filesystem. |
| 1061 | */ |
| 1062 | |
| 1063 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) |
| 1064 | { |
| 1065 | static struct tree_descr nfsd_files[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, |
J. Bruce Fields | e8e8753 | 2009-12-14 12:53:32 -0500 | [diff] [blame] | 1067 | [NFSD_Export_features] = {"export_features", |
| 1068 | &export_features_operations, S_IRUGO}, |
Wendy Cheng | 4373ea8 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 1069 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
| 1070 | &transaction_ops, S_IWUSR|S_IRUSR}, |
Wendy Cheng | 17efa37 | 2008-01-17 11:10:12 -0500 | [diff] [blame] | 1071 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
| 1072 | &transaction_ops, S_IWUSR|S_IRUSR}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
| 1074 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
Greg Banks | eed2965 | 2006-10-02 02:18:02 -0700 | [diff] [blame] | 1075 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
Greg Banks | 03cf6c9 | 2009-01-13 21:26:36 +1100 | [diff] [blame] | 1076 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
NeilBrown | 70c3b76 | 2005-11-07 01:00:25 -0800 | [diff] [blame] | 1077 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
NeilBrown | 80212d5 | 2006-10-02 02:17:47 -0700 | [diff] [blame] | 1078 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
NeilBrown | 596bbe5 | 2006-10-04 02:15:48 -0700 | [diff] [blame] | 1079 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 1080 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
Kevin Coffman | b0b0c0a | 2011-03-02 19:51:42 -0500 | [diff] [blame] | 1081 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
J. Bruce Fields | b084f59 | 2011-05-31 12:24:58 -0400 | [diff] [blame] | 1082 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | #ifdef CONFIG_NFSD_V4 |
| 1084 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 1085 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 1086 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | #endif |
| 1088 | /* last one */ {""} |
| 1089 | }; |
| 1090 | return simple_fill_super(sb, 0x6e667364, nfsd_files); |
| 1091 | } |
| 1092 | |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1093 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
| 1094 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | { |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1096 | return mount_single(fs_type, flags, data, nfsd_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | } |
| 1098 | |
| 1099 | static struct file_system_type nfsd_fs_type = { |
| 1100 | .owner = THIS_MODULE, |
| 1101 | .name = "nfsd", |
Al Viro | fc14f2f | 2010-07-25 01:48:30 +0400 | [diff] [blame] | 1102 | .mount = nfsd_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | .kill_sb = kill_litter_super, |
| 1104 | }; |
| 1105 | |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1106 | #ifdef CONFIG_PROC_FS |
| 1107 | static int create_proc_exports_entry(void) |
| 1108 | { |
| 1109 | struct proc_dir_entry *entry; |
| 1110 | |
| 1111 | entry = proc_mkdir("fs/nfs", NULL); |
| 1112 | if (!entry) |
| 1113 | return -ENOMEM; |
Denis V. Lunev | 9ef2db2 | 2008-04-29 01:02:04 -0700 | [diff] [blame] | 1114 | entry = proc_create("exports", 0, entry, &exports_operations); |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1115 | if (!entry) |
| 1116 | return -ENOMEM; |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1117 | return 0; |
| 1118 | } |
| 1119 | #else /* CONFIG_PROC_FS */ |
| 1120 | static int create_proc_exports_entry(void) |
| 1121 | { |
| 1122 | return 0; |
| 1123 | } |
| 1124 | #endif |
| 1125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | static int __init init_nfsd(void) |
| 1127 | { |
| 1128 | int retval; |
| 1129 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); |
| 1130 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1131 | retval = nfs4_state_init(); /* nfs4 locking state */ |
| 1132 | if (retval) |
| 1133 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | nfsd_stat_init(); /* Statistics */ |
J. Bruce Fields | d5c3428 | 2007-11-09 14:10:56 -0500 | [diff] [blame] | 1135 | retval = nfsd_reply_cache_init(); |
| 1136 | if (retval) |
| 1137 | goto out_free_stat; |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1138 | retval = nfsd_export_init(); |
| 1139 | if (retval) |
| 1140 | goto out_free_cache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1142 | retval = nfsd_idmap_init(); |
| 1143 | if (retval) |
| 1144 | goto out_free_lockd; |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1145 | retval = create_proc_exports_entry(); |
| 1146 | if (retval) |
| 1147 | goto out_free_idmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | retval = register_filesystem(&nfsd_fs_type); |
J. Bruce Fields | 26808d3 | 2007-11-09 13:44:06 -0500 | [diff] [blame] | 1149 | if (retval) |
| 1150 | goto out_free_all; |
| 1151 | return 0; |
| 1152 | out_free_all: |
J. Bruce Fields | 26808d3 | 2007-11-09 13:44:06 -0500 | [diff] [blame] | 1153 | remove_proc_entry("fs/nfs/exports", NULL); |
| 1154 | remove_proc_entry("fs/nfs", NULL); |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1155 | out_free_idmap: |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1156 | nfsd_idmap_shutdown(); |
| 1157 | out_free_lockd: |
J. Bruce Fields | 26808d3 | 2007-11-09 13:44:06 -0500 | [diff] [blame] | 1158 | nfsd_lockd_shutdown(); |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1159 | nfsd_export_shutdown(); |
J. Bruce Fields | dbf847e | 2007-11-08 17:20:34 -0500 | [diff] [blame] | 1160 | out_free_cache: |
J. Bruce Fields | e331f60 | 2007-11-12 17:32:21 -0500 | [diff] [blame] | 1161 | nfsd_reply_cache_shutdown(); |
J. Bruce Fields | d5c3428 | 2007-11-09 14:10:56 -0500 | [diff] [blame] | 1162 | out_free_stat: |
| 1163 | nfsd_stat_shutdown(); |
J. Bruce Fields | 26808d3 | 2007-11-09 13:44:06 -0500 | [diff] [blame] | 1164 | nfsd4_free_slabs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | return retval; |
| 1166 | } |
| 1167 | |
| 1168 | static void __exit exit_nfsd(void) |
| 1169 | { |
| 1170 | nfsd_export_shutdown(); |
J. Bruce Fields | d5c3428 | 2007-11-09 14:10:56 -0500 | [diff] [blame] | 1171 | nfsd_reply_cache_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | remove_proc_entry("fs/nfs/exports", NULL); |
| 1173 | remove_proc_entry("fs/nfs", NULL); |
| 1174 | nfsd_stat_shutdown(); |
| 1175 | nfsd_lockd_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | nfsd_idmap_shutdown(); |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1177 | nfsd4_free_slabs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | unregister_filesystem(&nfsd_fs_type); |
| 1179 | } |
| 1180 | |
| 1181 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1182 | MODULE_LICENSE("GPL"); |
| 1183 | module_init(init_nfsd) |
| 1184 | module_exit(exit_nfsd) |