NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1 | /* |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2 | * Copyright (c) 2004 The Regents of the University of Michigan. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Andy Adamson <andros@citi.umich.edu> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived |
| 18 | * from this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 21 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 22 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 23 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 27 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 34 | #include <linux/file.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 36 | #include <linux/namei.h> |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 37 | #include <linux/crypto.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 38 | #include <linux/sched.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 39 | |
| 40 | #include "nfsd.h" |
| 41 | #include "state.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 42 | #include "vfs.h" |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 43 | |
| 44 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 45 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 46 | /* Globals */ |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 47 | static struct file *rec_file; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 48 | |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 49 | static int |
| 50 | nfs4_save_creds(const struct cred **original_creds) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 51 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 52 | struct cred *new; |
| 53 | |
| 54 | new = prepare_creds(); |
| 55 | if (!new) |
| 56 | return -ENOMEM; |
| 57 | |
| 58 | new->fsuid = 0; |
| 59 | new->fsgid = 0; |
| 60 | *original_creds = override_creds(new); |
| 61 | put_cred(new); |
| 62 | return 0; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | static void |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 66 | nfs4_reset_creds(const struct cred *original) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 67 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 68 | revert_creds(original); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 69 | } |
| 70 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 71 | static void |
| 72 | md5_to_hex(char *out, char *md5) |
| 73 | { |
| 74 | int i; |
| 75 | |
| 76 | for (i=0; i<16; i++) { |
| 77 | unsigned char c = md5[i]; |
| 78 | |
| 79 | *out++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1); |
| 80 | *out++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1); |
| 81 | } |
| 82 | *out = '\0'; |
| 83 | } |
| 84 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 85 | __be32 |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 86 | nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname) |
| 87 | { |
| 88 | struct xdr_netobj cksum; |
Herbert Xu | 3505868 | 2006-08-24 19:10:20 +1000 | [diff] [blame] | 89 | struct hash_desc desc; |
Jens Axboe | 60c74f8 | 2007-10-22 19:43:30 +0200 | [diff] [blame] | 90 | struct scatterlist sg; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 91 | __be32 status = nfserr_resource; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 92 | |
| 93 | dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n", |
| 94 | clname->len, clname->data); |
Herbert Xu | 3505868 | 2006-08-24 19:10:20 +1000 | [diff] [blame] | 95 | desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
| 96 | desc.tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC); |
| 97 | if (IS_ERR(desc.tfm)) |
| 98 | goto out_no_tfm; |
| 99 | cksum.len = crypto_hash_digestsize(desc.tfm); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 100 | cksum.data = kmalloc(cksum.len, GFP_KERNEL); |
| 101 | if (cksum.data == NULL) |
| 102 | goto out; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 103 | |
Jens Axboe | 60c74f8 | 2007-10-22 19:43:30 +0200 | [diff] [blame] | 104 | sg_init_one(&sg, clname->data, clname->len); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 105 | |
Jens Axboe | 60c74f8 | 2007-10-22 19:43:30 +0200 | [diff] [blame] | 106 | if (crypto_hash_digest(&desc, &sg, sg.length, cksum.data)) |
Herbert Xu | 3505868 | 2006-08-24 19:10:20 +1000 | [diff] [blame] | 107 | goto out; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 108 | |
| 109 | md5_to_hex(dname, cksum.data); |
| 110 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 111 | status = nfs_ok; |
| 112 | out: |
Krishna Kumar | 2bd9e7b | 2008-10-20 11:47:09 +0530 | [diff] [blame] | 113 | kfree(cksum.data); |
Herbert Xu | 3505868 | 2006-08-24 19:10:20 +1000 | [diff] [blame] | 114 | crypto_free_hash(desc.tfm); |
| 115 | out_no_tfm: |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 116 | return status; |
| 117 | } |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 118 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 119 | int |
| 120 | nfsd4_create_clid_dir(struct nfs4_client *clp) |
| 121 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 122 | const struct cred *original_cred; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 123 | char *dname = clp->cl_recdir; |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 124 | struct dentry *dir, *dentry; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 125 | int status; |
| 126 | |
| 127 | dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname); |
| 128 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 129 | if (!rec_file || clp->cl_firststate) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 130 | return 0; |
| 131 | |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 132 | status = nfs4_save_creds(&original_cred); |
| 133 | if (status < 0) |
| 134 | return status; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 135 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 136 | dir = rec_file->f_path.dentry; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 137 | /* lock the parent */ |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 138 | mutex_lock(&dir->d_inode->i_mutex); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 139 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 140 | dentry = lookup_one_len(dname, dir, HEXDIR_LEN-1); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 141 | if (IS_ERR(dentry)) { |
| 142 | status = PTR_ERR(dentry); |
| 143 | goto out_unlock; |
| 144 | } |
| 145 | status = -EEXIST; |
| 146 | if (dentry->d_inode) { |
| 147 | dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n"); |
| 148 | goto out_put; |
| 149 | } |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 150 | status = mnt_want_write(rec_file->f_path.mnt); |
Dave Hansen | 463c319 | 2008-02-15 14:37:57 -0800 | [diff] [blame] | 151 | if (status) |
| 152 | goto out_put; |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 153 | status = vfs_mkdir(dir->d_inode, dentry, S_IRWXU); |
| 154 | mnt_drop_write(rec_file->f_path.mnt); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 155 | out_put: |
| 156 | dput(dentry); |
| 157 | out_unlock: |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 158 | mutex_unlock(&dir->d_inode->i_mutex); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 159 | if (status == 0) { |
| 160 | clp->cl_firststate = 1; |
Christoph Hellwig | 8018ab0 | 2010-03-22 17:32:25 +0100 | [diff] [blame] | 161 | vfs_fsync(rec_file, 0); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 162 | } |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 163 | nfs4_reset_creds(original_cred); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 164 | dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status); |
| 165 | return status; |
| 166 | } |
| 167 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 168 | typedef int (recdir_func)(struct dentry *, struct dentry *); |
| 169 | |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 170 | struct name_list { |
| 171 | char name[HEXDIR_LEN]; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 172 | struct list_head list; |
| 173 | }; |
| 174 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 175 | static int |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 176 | nfsd4_build_namelist(void *arg, const char *name, int namlen, |
David Howells | afefdbb | 2006-10-03 01:13:46 -0700 | [diff] [blame] | 177 | loff_t offset, u64 ino, unsigned int d_type) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 178 | { |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 179 | struct list_head *names = arg; |
| 180 | struct name_list *entry; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 181 | |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 182 | if (namlen != HEXDIR_LEN - 1) |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 183 | return 0; |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 184 | entry = kmalloc(sizeof(struct name_list), GFP_KERNEL); |
| 185 | if (entry == NULL) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 186 | return -ENOMEM; |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 187 | memcpy(entry->name, name, HEXDIR_LEN - 1); |
| 188 | entry->name[HEXDIR_LEN - 1] = '\0'; |
| 189 | list_add(&entry->list, names); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 194 | nfsd4_list_rec_dir(recdir_func *f) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 195 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 196 | const struct cred *original_cred; |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 197 | struct dentry *dir = rec_file->f_path.dentry; |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 198 | LIST_HEAD(names); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 199 | int status; |
| 200 | |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 201 | status = nfs4_save_creds(&original_cred); |
| 202 | if (status < 0) |
| 203 | return status; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 204 | |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 205 | status = vfs_llseek(rec_file, 0, SEEK_SET); |
| 206 | if (status < 0) { |
| 207 | nfs4_reset_creds(original_cred); |
| 208 | return status; |
| 209 | } |
| 210 | |
| 211 | status = vfs_readdir(rec_file, nfsd4_build_namelist, &names); |
J. Bruce Fields | 8daed1e | 2009-05-11 16:10:19 -0400 | [diff] [blame] | 212 | mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 213 | while (!list_empty(&names)) { |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 214 | struct name_list *entry; |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 215 | entry = list_entry(names.next, struct name_list, list); |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 216 | if (!status) { |
| 217 | struct dentry *dentry; |
| 218 | dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1); |
| 219 | if (IS_ERR(dentry)) { |
| 220 | status = PTR_ERR(dentry); |
| 221 | break; |
| 222 | } |
| 223 | status = f(dir, dentry); |
| 224 | dput(dentry); |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 225 | } |
J. Bruce Fields | 05f4f67 | 2009-03-13 16:02:59 -0400 | [diff] [blame] | 226 | list_del(&entry->list); |
| 227 | kfree(entry); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 228 | } |
David Woodhouse | 2f9092e | 2009-04-20 23:18:37 +0100 | [diff] [blame] | 229 | mutex_unlock(&dir->d_inode->i_mutex); |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 230 | nfs4_reset_creds(original_cred); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 231 | return status; |
| 232 | } |
| 233 | |
| 234 | static int |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 235 | nfsd4_unlink_clid_dir(char *name, int namlen) |
| 236 | { |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 237 | struct dentry *dir, *dentry; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 238 | int status; |
| 239 | |
| 240 | dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name); |
| 241 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 242 | dir = rec_file->f_path.dentry; |
| 243 | mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT); |
| 244 | dentry = lookup_one_len(name, dir, namlen); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 245 | if (IS_ERR(dentry)) { |
| 246 | status = PTR_ERR(dentry); |
David Woodhouse | 2f9092e | 2009-04-20 23:18:37 +0100 | [diff] [blame] | 247 | goto out_unlock; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 248 | } |
| 249 | status = -ENOENT; |
| 250 | if (!dentry->d_inode) |
| 251 | goto out; |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 252 | status = vfs_rmdir(dir->d_inode, dentry); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 253 | out: |
| 254 | dput(dentry); |
David Woodhouse | 2f9092e | 2009-04-20 23:18:37 +0100 | [diff] [blame] | 255 | out_unlock: |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 256 | mutex_unlock(&dir->d_inode->i_mutex); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 257 | return status; |
| 258 | } |
| 259 | |
| 260 | void |
| 261 | nfsd4_remove_clid_dir(struct nfs4_client *clp) |
| 262 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 263 | const struct cred *original_cred; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 264 | int status; |
| 265 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 266 | if (!rec_file || !clp->cl_firststate) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 267 | return; |
| 268 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 269 | status = mnt_want_write(rec_file->f_path.mnt); |
Dave Hansen | 0622753 | 2008-02-15 14:37:34 -0800 | [diff] [blame] | 270 | if (status) |
| 271 | goto out; |
NeilBrown | 67be431 | 2005-07-07 17:59:13 -0700 | [diff] [blame] | 272 | clp->cl_firststate = 0; |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 273 | |
| 274 | status = nfs4_save_creds(&original_cred); |
| 275 | if (status < 0) |
| 276 | goto out; |
| 277 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 278 | status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1); |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 279 | nfs4_reset_creds(original_cred); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 280 | if (status == 0) |
Christoph Hellwig | 8018ab0 | 2010-03-22 17:32:25 +0100 | [diff] [blame] | 281 | vfs_fsync(rec_file, 0); |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 282 | mnt_drop_write(rec_file->f_path.mnt); |
Dave Hansen | 0622753 | 2008-02-15 14:37:34 -0800 | [diff] [blame] | 283 | out: |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 284 | if (status) |
| 285 | printk("NFSD: Failed to remove expired client state directory" |
| 286 | " %.*s\n", HEXDIR_LEN, clp->cl_recdir); |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | static int |
| 291 | purge_old(struct dentry *parent, struct dentry *child) |
| 292 | { |
| 293 | int status; |
| 294 | |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 295 | if (nfs4_has_reclaimed_state(child->d_name.name, false)) |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 296 | return 0; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 297 | |
David Woodhouse | 2f9092e | 2009-04-20 23:18:37 +0100 | [diff] [blame] | 298 | status = vfs_rmdir(parent->d_inode, child); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 299 | if (status) |
| 300 | printk("failed to remove client recovery directory %s\n", |
| 301 | child->d_name.name); |
| 302 | /* Keep trying, success or failure: */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 303 | return 0; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | void |
| 307 | nfsd4_recdir_purge_old(void) { |
| 308 | int status; |
| 309 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 310 | if (!rec_file) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 311 | return; |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 312 | status = mnt_want_write(rec_file->f_path.mnt); |
Dave Hansen | 0622753 | 2008-02-15 14:37:34 -0800 | [diff] [blame] | 313 | if (status) |
| 314 | goto out; |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 315 | status = nfsd4_list_rec_dir(purge_old); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 316 | if (status == 0) |
Christoph Hellwig | 8018ab0 | 2010-03-22 17:32:25 +0100 | [diff] [blame] | 317 | vfs_fsync(rec_file, 0); |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 318 | mnt_drop_write(rec_file->f_path.mnt); |
Dave Hansen | 0622753 | 2008-02-15 14:37:34 -0800 | [diff] [blame] | 319 | out: |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 320 | if (status) |
| 321 | printk("nfsd4: failed to purge old clients from recovery" |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 322 | " directory %s\n", rec_file->f_path.dentry->d_name.name); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | static int |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 326 | load_recdir(struct dentry *parent, struct dentry *child) |
| 327 | { |
| 328 | if (child->d_name.len != HEXDIR_LEN - 1) { |
| 329 | printk("nfsd4: illegal name %s in recovery directory\n", |
| 330 | child->d_name.name); |
| 331 | /* Keep trying; maybe the others are OK: */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 332 | return 0; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 333 | } |
| 334 | nfs4_client_to_reclaim(child->d_name.name); |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 335 | return 0; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | int |
| 339 | nfsd4_recdir_load(void) { |
| 340 | int status; |
| 341 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 342 | if (!rec_file) |
| 343 | return 0; |
| 344 | |
Al Viro | 5b4b299 | 2011-07-07 18:43:21 -0400 | [diff] [blame] | 345 | status = nfsd4_list_rec_dir(load_recdir); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 346 | if (status) |
| 347 | printk("nfsd4: failed loading clients from recovery" |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 348 | " directory %s\n", rec_file->f_path.dentry->d_name.name); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 349 | return status; |
| 350 | } |
| 351 | |
| 352 | /* |
| 353 | * Hold reference to the recovery directory. |
| 354 | */ |
| 355 | |
| 356 | void |
| 357 | nfsd4_init_recdir(char *rec_dirname) |
| 358 | { |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 359 | const struct cred *original_cred; |
| 360 | int status; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 361 | |
| 362 | printk("NFSD: Using %s as the NFSv4 state recovery directory\n", |
| 363 | rec_dirname); |
| 364 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 365 | BUG_ON(rec_file); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 366 | |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 367 | status = nfs4_save_creds(&original_cred); |
| 368 | if (status < 0) { |
| 369 | printk("NFSD: Unable to change credentials to find recovery" |
| 370 | " directory: error %d\n", |
| 371 | status); |
| 372 | return; |
| 373 | } |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 374 | |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 375 | rec_file = filp_open(rec_dirname, O_RDONLY | O_DIRECTORY, 0); |
| 376 | if (IS_ERR(rec_file)) { |
J. Bruce Fields | c2642ab | 2006-01-18 17:43:29 -0800 | [diff] [blame] | 377 | printk("NFSD: unable to find recovery directory %s\n", |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 378 | rec_dirname); |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 379 | rec_file = NULL; |
| 380 | } |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 381 | |
David Howells | d84f4f9 | 2008-11-14 10:39:23 +1100 | [diff] [blame] | 382 | nfs4_reset_creds(original_cred); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | void |
| 386 | nfsd4_shutdown_recdir(void) |
| 387 | { |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 388 | if (!rec_file) |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 389 | return; |
Christoph Hellwig | e970a57 | 2010-03-22 17:32:14 +0100 | [diff] [blame] | 390 | fput(rec_file); |
| 391 | rec_file = NULL; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 392 | } |