Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/nfs/nfs4proc.c |
| 3 | * |
| 4 | * Client-side procedure declarations for NFSv4. |
| 5 | * |
| 6 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Kendrick Smith <kmsmith@umich.edu> |
| 10 | * Andy Adamson <andros@umich.edu> |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * |
| 16 | * 1. Redistributions of source code must retain the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer. |
| 18 | * 2. Redistributions in binary form must reproduce the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer in the |
| 20 | * documentation and/or other materials provided with the distribution. |
| 21 | * 3. Neither the name of the University nor the names of its |
| 22 | * contributors may be used to endorse or promote products derived |
| 23 | * from this software without specific prior written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/utsname.h> |
| 40 | #include <linux/delay.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/string.h> |
| 43 | #include <linux/sunrpc/clnt.h> |
| 44 | #include <linux/nfs.h> |
| 45 | #include <linux/nfs4.h> |
| 46 | #include <linux/nfs_fs.h> |
| 47 | #include <linux/nfs_page.h> |
| 48 | #include <linux/smp_lock.h> |
| 49 | #include <linux/namei.h> |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 50 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 52 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include "delegation.h" |
Chuck Lever | 006ea73 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 54 | #include "iostat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | #define NFSDBG_FACILITY NFSDBG_PROC |
| 57 | |
Trond Myklebust | 2066fe8 | 2006-09-15 08:30:46 -0400 | [diff] [blame] | 58 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
| 60 | |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 61 | struct nfs4_opendata; |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 62 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 64 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 66 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 67 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | /* Prevent leaks of NFSv4 errors into userland */ |
| 70 | int nfs4_map_errors(int err) |
| 71 | { |
| 72 | if (err < -1000) { |
| 73 | dprintk("%s could not handle NFSv4 error %d\n", |
| 74 | __FUNCTION__, -err); |
| 75 | return -EIO; |
| 76 | } |
| 77 | return err; |
| 78 | } |
| 79 | |
| 80 | /* |
| 81 | * This is our standard bitmap for GETATTR requests. |
| 82 | */ |
| 83 | const u32 nfs4_fattr_bitmap[2] = { |
| 84 | FATTR4_WORD0_TYPE |
| 85 | | FATTR4_WORD0_CHANGE |
| 86 | | FATTR4_WORD0_SIZE |
| 87 | | FATTR4_WORD0_FSID |
| 88 | | FATTR4_WORD0_FILEID, |
| 89 | FATTR4_WORD1_MODE |
| 90 | | FATTR4_WORD1_NUMLINKS |
| 91 | | FATTR4_WORD1_OWNER |
| 92 | | FATTR4_WORD1_OWNER_GROUP |
| 93 | | FATTR4_WORD1_RAWDEV |
| 94 | | FATTR4_WORD1_SPACE_USED |
| 95 | | FATTR4_WORD1_TIME_ACCESS |
| 96 | | FATTR4_WORD1_TIME_METADATA |
| 97 | | FATTR4_WORD1_TIME_MODIFY |
| 98 | }; |
| 99 | |
| 100 | const u32 nfs4_statfs_bitmap[2] = { |
| 101 | FATTR4_WORD0_FILES_AVAIL |
| 102 | | FATTR4_WORD0_FILES_FREE |
| 103 | | FATTR4_WORD0_FILES_TOTAL, |
| 104 | FATTR4_WORD1_SPACE_AVAIL |
| 105 | | FATTR4_WORD1_SPACE_FREE |
| 106 | | FATTR4_WORD1_SPACE_TOTAL |
| 107 | }; |
| 108 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 109 | const u32 nfs4_pathconf_bitmap[2] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | FATTR4_WORD0_MAXLINK |
| 111 | | FATTR4_WORD0_MAXNAME, |
| 112 | 0 |
| 113 | }; |
| 114 | |
| 115 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE |
| 116 | | FATTR4_WORD0_MAXREAD |
| 117 | | FATTR4_WORD0_MAXWRITE |
| 118 | | FATTR4_WORD0_LEASE_TIME, |
| 119 | 0 |
| 120 | }; |
| 121 | |
Manoj Naik | 830b8e3 | 2006-06-09 09:34:25 -0400 | [diff] [blame] | 122 | const u32 nfs4_fs_locations_bitmap[2] = { |
| 123 | FATTR4_WORD0_TYPE |
| 124 | | FATTR4_WORD0_CHANGE |
| 125 | | FATTR4_WORD0_SIZE |
| 126 | | FATTR4_WORD0_FSID |
| 127 | | FATTR4_WORD0_FILEID |
| 128 | | FATTR4_WORD0_FS_LOCATIONS, |
| 129 | FATTR4_WORD1_MODE |
| 130 | | FATTR4_WORD1_NUMLINKS |
| 131 | | FATTR4_WORD1_OWNER |
| 132 | | FATTR4_WORD1_OWNER_GROUP |
| 133 | | FATTR4_WORD1_RAWDEV |
| 134 | | FATTR4_WORD1_SPACE_USED |
| 135 | | FATTR4_WORD1_TIME_ACCESS |
| 136 | | FATTR4_WORD1_TIME_METADATA |
| 137 | | FATTR4_WORD1_TIME_MODIFY |
| 138 | | FATTR4_WORD1_MOUNTED_ON_FILEID |
| 139 | }; |
| 140 | |
Al Viro | bc4785c | 2006-10-19 23:28:51 -0700 | [diff] [blame] | 141 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | struct nfs4_readdir_arg *readdir) |
| 143 | { |
Al Viro | 0dbb4c6 | 2006-10-19 23:28:49 -0700 | [diff] [blame] | 144 | __be32 *start, *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | BUG_ON(readdir->count < 80); |
| 147 | if (cookie > 2) { |
Adrian Bunk | b7ef195 | 2005-06-22 17:16:28 +0000 | [diff] [blame] | 148 | readdir->cookie = cookie; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | readdir->cookie = 0; |
| 154 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
| 155 | if (cookie == 2) |
| 156 | return; |
| 157 | |
| 158 | /* |
| 159 | * NFSv4 servers do not return entries for '.' and '..' |
| 160 | * Therefore, we fake these entries here. We let '.' |
| 161 | * have cookie 0 and '..' have cookie 1. Note that |
| 162 | * when talking to the server, we always send cookie 0 |
| 163 | * instead of 1 or 2. |
| 164 | */ |
Al Viro | 0dbb4c6 | 2006-10-19 23:28:49 -0700 | [diff] [blame] | 165 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | if (cookie == 0) { |
| 168 | *p++ = xdr_one; /* next */ |
| 169 | *p++ = xdr_zero; /* cookie, first word */ |
| 170 | *p++ = xdr_one; /* cookie, second word */ |
| 171 | *p++ = xdr_one; /* entry len */ |
| 172 | memcpy(p, ".\0\0\0", 4); /* entry */ |
| 173 | p++; |
| 174 | *p++ = xdr_one; /* bitmap length */ |
| 175 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 176 | *p++ = htonl(8); /* attribute buffer length */ |
| 177 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); |
| 178 | } |
| 179 | |
| 180 | *p++ = xdr_one; /* next */ |
| 181 | *p++ = xdr_zero; /* cookie, first word */ |
| 182 | *p++ = xdr_two; /* cookie, second word */ |
| 183 | *p++ = xdr_two; /* entry len */ |
| 184 | memcpy(p, "..\0\0", 4); /* entry */ |
| 185 | p++; |
| 186 | *p++ = xdr_one; /* bitmap length */ |
| 187 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ |
| 188 | *p++ = htonl(8); /* attribute buffer length */ |
| 189 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); |
| 190 | |
| 191 | readdir->pgbase = (char *)p - (char *)start; |
| 192 | readdir->count -= readdir->pgbase; |
| 193 | kunmap_atomic(start, KM_USER0); |
| 194 | } |
| 195 | |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 196 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 198 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | spin_lock(&clp->cl_lock); |
| 200 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 201 | clp->cl_last_renewal = timestamp; |
| 202 | spin_unlock(&clp->cl_lock); |
| 203 | } |
| 204 | |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 205 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 207 | struct nfs_inode *nfsi = NFS_I(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 209 | spin_lock(&dir->i_lock); |
| 210 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
| 212 | nfsi->change_attr = cinfo->after; |
Trond Myklebust | 38478b2 | 2006-05-25 01:40:57 -0400 | [diff] [blame] | 213 | spin_unlock(&dir->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 216 | struct nfs4_opendata { |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 217 | atomic_t count; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 218 | struct nfs_openargs o_arg; |
| 219 | struct nfs_openres o_res; |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 220 | struct nfs_open_confirmargs c_arg; |
| 221 | struct nfs_open_confirmres c_res; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 222 | struct nfs_fattr f_attr; |
| 223 | struct nfs_fattr dir_attr; |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 224 | struct path path; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 225 | struct dentry *dir; |
| 226 | struct nfs4_state_owner *owner; |
| 227 | struct iattr attrs; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 228 | unsigned long timestamp; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 229 | int rpc_status; |
| 230 | int cancelled; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 231 | }; |
| 232 | |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 233 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 234 | struct nfs4_state_owner *sp, int flags, |
| 235 | const struct iattr *attrs) |
| 236 | { |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 237 | struct dentry *parent = dget_parent(path->dentry); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 238 | struct inode *dir = parent->d_inode; |
| 239 | struct nfs_server *server = NFS_SERVER(dir); |
| 240 | struct nfs4_opendata *p; |
| 241 | |
| 242 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 243 | if (p == NULL) |
| 244 | goto err; |
| 245 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 246 | if (p->o_arg.seqid == NULL) |
| 247 | goto err_free; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 248 | atomic_set(&p->count, 1); |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 249 | p->path.mnt = mntget(path->mnt); |
| 250 | p->path.dentry = dget(path->dentry); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 251 | p->dir = parent; |
| 252 | p->owner = sp; |
| 253 | atomic_inc(&sp->so_count); |
| 254 | p->o_arg.fh = NFS_FH(dir); |
| 255 | p->o_arg.open_flags = flags, |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 256 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 257 | p->o_arg.id = sp->so_id; |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 258 | p->o_arg.name = &p->path.dentry->d_name; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 259 | p->o_arg.server = server; |
| 260 | p->o_arg.bitmask = server->attr_bitmask; |
| 261 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; |
| 262 | p->o_res.f_attr = &p->f_attr; |
| 263 | p->o_res.dir_attr = &p->dir_attr; |
| 264 | p->o_res.server = server; |
| 265 | nfs_fattr_init(&p->f_attr); |
| 266 | nfs_fattr_init(&p->dir_attr); |
| 267 | if (flags & O_EXCL) { |
| 268 | u32 *s = (u32 *) p->o_arg.u.verifier.data; |
| 269 | s[0] = jiffies; |
| 270 | s[1] = current->pid; |
| 271 | } else if (flags & O_CREAT) { |
| 272 | p->o_arg.u.attrs = &p->attrs; |
| 273 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); |
| 274 | } |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 275 | p->c_arg.fh = &p->o_res.fh; |
| 276 | p->c_arg.stateid = &p->o_res.stateid; |
| 277 | p->c_arg.seqid = p->o_arg.seqid; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 278 | return p; |
| 279 | err_free: |
| 280 | kfree(p); |
| 281 | err: |
| 282 | dput(parent); |
| 283 | return NULL; |
| 284 | } |
| 285 | |
| 286 | static void nfs4_opendata_free(struct nfs4_opendata *p) |
| 287 | { |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 288 | if (p != NULL && atomic_dec_and_test(&p->count)) { |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 289 | nfs_free_seqid(p->o_arg.seqid); |
| 290 | nfs4_put_state_owner(p->owner); |
| 291 | dput(p->dir); |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 292 | dput(p->path.dentry); |
| 293 | mntput(p->path.mnt); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 294 | kfree(p); |
| 295 | } |
| 296 | } |
| 297 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 298 | /* Helper for asynchronous RPC calls */ |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 299 | static int nfs4_call_async(struct rpc_clnt *clnt, |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 300 | const struct rpc_call_ops *tk_ops, void *calldata) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 301 | { |
| 302 | struct rpc_task *task; |
| 303 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 304 | if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 305 | return -ENOMEM; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 306 | rpc_execute(task); |
| 307 | return 0; |
| 308 | } |
| 309 | |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 310 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
| 311 | { |
| 312 | sigset_t oldset; |
| 313 | int ret; |
| 314 | |
| 315 | rpc_clnt_sigmask(task->tk_client, &oldset); |
| 316 | ret = rpc_wait_for_completion_task(task); |
| 317 | rpc_clnt_sigunmask(task->tk_client, &oldset); |
| 318 | return ret; |
| 319 | } |
| 320 | |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 321 | static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) |
| 322 | { |
| 323 | switch (open_flags) { |
| 324 | case FMODE_WRITE: |
| 325 | state->n_wronly++; |
| 326 | break; |
| 327 | case FMODE_READ: |
| 328 | state->n_rdonly++; |
| 329 | break; |
| 330 | case FMODE_READ|FMODE_WRITE: |
| 331 | state->n_rdwr++; |
| 332 | } |
| 333 | } |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
| 336 | { |
| 337 | struct inode *inode = state->inode; |
| 338 | |
| 339 | open_flags &= (FMODE_READ|FMODE_WRITE); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 340 | /* Protect against nfs4_find_state_byowner() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 341 | spin_lock(&state->owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | spin_lock(&inode->i_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 343 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 344 | update_open_stateflags(state, open_flags); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 345 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 347 | spin_unlock(&state->owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 350 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
| 351 | { |
| 352 | struct inode *inode; |
| 353 | struct nfs4_state *state = NULL; |
| 354 | |
| 355 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
| 356 | goto out; |
| 357 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 358 | if (IS_ERR(inode)) |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 359 | goto out; |
| 360 | state = nfs4_get_open_state(inode, data->owner); |
| 361 | if (state == NULL) |
| 362 | goto put_inode; |
| 363 | update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); |
| 364 | put_inode: |
| 365 | iput(inode); |
| 366 | out: |
| 367 | return state; |
| 368 | } |
| 369 | |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 370 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
| 371 | { |
| 372 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 373 | struct nfs_open_context *ctx; |
| 374 | |
| 375 | spin_lock(&state->inode->i_lock); |
| 376 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 377 | if (ctx->state != state) |
| 378 | continue; |
| 379 | get_nfs_open_context(ctx); |
| 380 | spin_unlock(&state->inode->i_lock); |
| 381 | return ctx; |
| 382 | } |
| 383 | spin_unlock(&state->inode->i_lock); |
| 384 | return ERR_PTR(-ENOENT); |
| 385 | } |
| 386 | |
| 387 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid) |
| 388 | { |
| 389 | int ret; |
| 390 | |
| 391 | opendata->o_arg.open_flags = openflags; |
| 392 | ret = _nfs4_proc_open(opendata); |
| 393 | if (ret != 0) |
| 394 | return ret; |
| 395 | memcpy(stateid->data, opendata->o_res.stateid.data, |
| 396 | sizeof(stateid->data)); |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
| 401 | { |
| 402 | nfs4_stateid stateid; |
| 403 | struct nfs4_state *newstate; |
| 404 | int mode = 0; |
| 405 | int delegation = 0; |
| 406 | int ret; |
| 407 | |
| 408 | /* memory barrier prior to reading state->n_* */ |
| 409 | smp_rmb(); |
| 410 | if (state->n_rdwr != 0) { |
| 411 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid); |
| 412 | if (ret != 0) |
| 413 | return ret; |
| 414 | mode |= FMODE_READ|FMODE_WRITE; |
| 415 | if (opendata->o_res.delegation_type != 0) |
| 416 | delegation = opendata->o_res.delegation_type; |
| 417 | smp_rmb(); |
| 418 | } |
| 419 | if (state->n_wronly != 0) { |
| 420 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid); |
| 421 | if (ret != 0) |
| 422 | return ret; |
| 423 | mode |= FMODE_WRITE; |
| 424 | if (opendata->o_res.delegation_type != 0) |
| 425 | delegation = opendata->o_res.delegation_type; |
| 426 | smp_rmb(); |
| 427 | } |
| 428 | if (state->n_rdonly != 0) { |
| 429 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid); |
| 430 | if (ret != 0) |
| 431 | return ret; |
| 432 | mode |= FMODE_READ; |
| 433 | } |
| 434 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 435 | if (mode == 0) |
| 436 | return 0; |
| 437 | if (opendata->o_res.delegation_type == 0) |
| 438 | opendata->o_res.delegation_type = delegation; |
| 439 | opendata->o_arg.open_flags |= mode; |
| 440 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
| 441 | if (newstate != NULL) { |
| 442 | if (opendata->o_res.delegation_type != 0) { |
| 443 | struct nfs_inode *nfsi = NFS_I(newstate->inode); |
| 444 | int delegation_flags = 0; |
| 445 | if (nfsi->delegation) |
| 446 | delegation_flags = nfsi->delegation->flags; |
| 447 | if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) |
| 448 | nfs_inode_set_delegation(newstate->inode, |
| 449 | opendata->owner->so_cred, |
| 450 | &opendata->o_res); |
| 451 | else |
| 452 | nfs_inode_reclaim_delegation(newstate->inode, |
| 453 | opendata->owner->so_cred, |
| 454 | &opendata->o_res); |
| 455 | } |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 456 | nfs4_close_state(&opendata->path, newstate, opendata->o_arg.open_flags); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 457 | } |
| 458 | if (newstate != state) |
| 459 | return -ESTALE; |
| 460 | return 0; |
| 461 | } |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | /* |
| 464 | * OPEN_RECLAIM: |
| 465 | * reclaim state on the server after a reboot. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | */ |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 467 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | { |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 469 | struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; |
| 470 | struct nfs4_opendata *opendata; |
| 471 | int delegation_type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | int status; |
| 473 | |
| 474 | if (delegation != NULL) { |
| 475 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
| 476 | memcpy(&state->stateid, &delegation->stateid, |
| 477 | sizeof(state->stateid)); |
| 478 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 479 | return 0; |
| 480 | } |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 481 | delegation_type = delegation->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 483 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 484 | if (opendata == NULL) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 485 | return -ENOMEM; |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 486 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
| 487 | opendata->o_arg.fh = NFS_FH(state->inode); |
| 488 | nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); |
| 489 | opendata->o_arg.u.delegation_type = delegation_type; |
| 490 | status = nfs4_open_recover(opendata, state); |
| 491 | nfs4_opendata_free(opendata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | return status; |
| 493 | } |
| 494 | |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 495 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | { |
| 497 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 498 | struct nfs4_exception exception = { }; |
| 499 | int err; |
| 500 | do { |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 501 | err = _nfs4_do_open_reclaim(ctx, state); |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 502 | if (err != -NFS4ERR_DELAY) |
| 503 | break; |
| 504 | nfs4_handle_exception(server, err, &exception); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } while (exception.retry); |
| 506 | return err; |
| 507 | } |
| 508 | |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 509 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 510 | { |
| 511 | struct nfs_open_context *ctx; |
| 512 | int ret; |
| 513 | |
| 514 | ctx = nfs4_state_find_open_context(state); |
| 515 | if (IS_ERR(ctx)) |
| 516 | return PTR_ERR(ctx); |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 517 | ret = nfs4_do_open_reclaim(ctx, state); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 518 | put_nfs_open_context(ctx); |
| 519 | return ret; |
| 520 | } |
| 521 | |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 522 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | { |
| 524 | struct nfs4_state_owner *sp = state->owner; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 525 | struct nfs4_opendata *opendata; |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 526 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 529 | return 0; |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 530 | opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 531 | if (opendata == NULL) |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 532 | return -ENOMEM; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 533 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 534 | memcpy(opendata->o_arg.u.delegation.data, state->stateid.data, |
| 535 | sizeof(opendata->o_arg.u.delegation.data)); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 536 | ret = nfs4_open_recover(opendata, state); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 537 | nfs4_opendata_free(opendata); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 538 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 541 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
| 543 | struct nfs4_exception exception = { }; |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 544 | struct nfs_server *server = NFS_SERVER(state->inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | int err; |
| 546 | do { |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 547 | err = _nfs4_open_delegation_recall(ctx, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | switch (err) { |
| 549 | case 0: |
| 550 | return err; |
| 551 | case -NFS4ERR_STALE_CLIENTID: |
| 552 | case -NFS4ERR_STALE_STATEID: |
| 553 | case -NFS4ERR_EXPIRED: |
| 554 | /* Don't recall a delegation if it was lost */ |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 555 | nfs4_schedule_state_recovery(server->nfs_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | return err; |
| 557 | } |
| 558 | err = nfs4_handle_exception(server, err, &exception); |
| 559 | } while (exception.retry); |
| 560 | return err; |
| 561 | } |
| 562 | |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 563 | static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 565 | struct nfs4_opendata *data = calldata; |
| 566 | struct rpc_message msg = { |
| 567 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
| 568 | .rpc_argp = &data->c_arg, |
| 569 | .rpc_resp = &data->c_res, |
| 570 | .rpc_cred = data->owner->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | }; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 572 | data->timestamp = jiffies; |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 573 | rpc_call_setup(task, &msg, 0); |
| 574 | } |
| 575 | |
| 576 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
| 577 | { |
| 578 | struct nfs4_opendata *data = calldata; |
| 579 | |
| 580 | data->rpc_status = task->tk_status; |
| 581 | if (RPC_ASSASSINATED(task)) |
| 582 | return; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 583 | if (data->rpc_status == 0) { |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 584 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
| 585 | sizeof(data->o_res.stateid.data)); |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 586 | renew_lease(data->o_res.server, data->timestamp); |
| 587 | } |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 588 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); |
| 589 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); |
| 590 | } |
| 591 | |
| 592 | static void nfs4_open_confirm_release(void *calldata) |
| 593 | { |
| 594 | struct nfs4_opendata *data = calldata; |
| 595 | struct nfs4_state *state = NULL; |
| 596 | |
| 597 | /* If this request hasn't been cancelled, do nothing */ |
| 598 | if (data->cancelled == 0) |
| 599 | goto out_free; |
| 600 | /* In case of error, no cleanup! */ |
| 601 | if (data->rpc_status != 0) |
| 602 | goto out_free; |
| 603 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 604 | state = nfs4_opendata_to_nfs4_state(data); |
| 605 | if (state != NULL) |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 606 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 607 | out_free: |
| 608 | nfs4_opendata_free(data); |
| 609 | } |
| 610 | |
| 611 | static const struct rpc_call_ops nfs4_open_confirm_ops = { |
| 612 | .rpc_call_prepare = nfs4_open_confirm_prepare, |
| 613 | .rpc_call_done = nfs4_open_confirm_done, |
| 614 | .rpc_release = nfs4_open_confirm_release, |
| 615 | }; |
| 616 | |
| 617 | /* |
| 618 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
| 619 | */ |
| 620 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
| 621 | { |
| 622 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); |
| 623 | struct rpc_task *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | int status; |
| 625 | |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 626 | atomic_inc(&data->count); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 627 | /* |
| 628 | * If rpc_run_task() ends up calling ->rpc_release(), we |
| 629 | * want to ensure that it takes the 'error' code path. |
| 630 | */ |
| 631 | data->rpc_status = -ENOMEM; |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 632 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 633 | if (IS_ERR(task)) |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 634 | return PTR_ERR(task); |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 635 | status = nfs4_wait_for_completion_rpc_task(task); |
| 636 | if (status != 0) { |
| 637 | data->cancelled = 1; |
| 638 | smp_wmb(); |
| 639 | } else |
| 640 | status = data->rpc_status; |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 641 | rpc_put_task(task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return status; |
| 643 | } |
| 644 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 645 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | { |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 647 | struct nfs4_opendata *data = calldata; |
| 648 | struct nfs4_state_owner *sp = data->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | struct rpc_message msg = { |
| 650 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 651 | .rpc_argp = &data->o_arg, |
| 652 | .rpc_resp = &data->o_res, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | .rpc_cred = sp->so_cred, |
| 654 | }; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 655 | |
| 656 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
| 657 | return; |
| 658 | /* Update sequence id. */ |
| 659 | data->o_arg.id = sp->so_id; |
| 660 | data->o_arg.clientid = sp->so_client->cl_clientid; |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 661 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
| 662 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 663 | data->timestamp = jiffies; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 664 | rpc_call_setup(task, &msg, 0); |
| 665 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 667 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
| 668 | { |
| 669 | struct nfs4_opendata *data = calldata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 671 | data->rpc_status = task->tk_status; |
| 672 | if (RPC_ASSASSINATED(task)) |
| 673 | return; |
| 674 | if (task->tk_status == 0) { |
| 675 | switch (data->o_res.f_attr->mode & S_IFMT) { |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 676 | case S_IFREG: |
| 677 | break; |
| 678 | case S_IFLNK: |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 679 | data->rpc_status = -ELOOP; |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 680 | break; |
| 681 | case S_IFDIR: |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 682 | data->rpc_status = -EISDIR; |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 683 | break; |
| 684 | default: |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 685 | data->rpc_status = -ENOTDIR; |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 686 | } |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 687 | renew_lease(data->o_res.server, data->timestamp); |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 688 | } |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 689 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); |
| 690 | } |
Trond Myklebust | 6f926b5 | 2005-10-18 14:20:18 -0700 | [diff] [blame] | 691 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 692 | static void nfs4_open_release(void *calldata) |
| 693 | { |
| 694 | struct nfs4_opendata *data = calldata; |
| 695 | struct nfs4_state *state = NULL; |
| 696 | |
| 697 | /* If this request hasn't been cancelled, do nothing */ |
| 698 | if (data->cancelled == 0) |
| 699 | goto out_free; |
| 700 | /* In case of error, no cleanup! */ |
| 701 | if (data->rpc_status != 0) |
| 702 | goto out_free; |
| 703 | /* In case we need an open_confirm, no cleanup! */ |
| 704 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
| 705 | goto out_free; |
| 706 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
| 707 | state = nfs4_opendata_to_nfs4_state(data); |
| 708 | if (state != NULL) |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 709 | nfs4_close_state(&data->path, state, data->o_arg.open_flags); |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 710 | out_free: |
| 711 | nfs4_opendata_free(data); |
| 712 | } |
| 713 | |
| 714 | static const struct rpc_call_ops nfs4_open_ops = { |
| 715 | .rpc_call_prepare = nfs4_open_prepare, |
| 716 | .rpc_call_done = nfs4_open_done, |
| 717 | .rpc_release = nfs4_open_release, |
| 718 | }; |
| 719 | |
| 720 | /* |
| 721 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
| 722 | */ |
| 723 | static int _nfs4_proc_open(struct nfs4_opendata *data) |
| 724 | { |
| 725 | struct inode *dir = data->dir->d_inode; |
| 726 | struct nfs_server *server = NFS_SERVER(dir); |
| 727 | struct nfs_openargs *o_arg = &data->o_arg; |
| 728 | struct nfs_openres *o_res = &data->o_res; |
| 729 | struct rpc_task *task; |
| 730 | int status; |
| 731 | |
| 732 | atomic_inc(&data->count); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 733 | /* |
| 734 | * If rpc_run_task() ends up calling ->rpc_release(), we |
| 735 | * want to ensure that it takes the 'error' code path. |
| 736 | */ |
| 737 | data->rpc_status = -ENOMEM; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 738 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 739 | if (IS_ERR(task)) |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 740 | return PTR_ERR(task); |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 741 | status = nfs4_wait_for_completion_rpc_task(task); |
| 742 | if (status != 0) { |
| 743 | data->cancelled = 1; |
| 744 | smp_wmb(); |
| 745 | } else |
| 746 | status = data->rpc_status; |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 747 | rpc_put_task(task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | if (status != 0) |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 749 | return status; |
| 750 | |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 751 | if (o_arg->open_flags & O_CREAT) { |
| 752 | update_changeattr(dir, &o_res->cinfo); |
| 753 | nfs_post_op_update_inode(dir, o_res->dir_attr); |
| 754 | } else |
| 755 | nfs_refresh_inode(dir, o_res->dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
Trond Myklebust | cdd4e68 | 2006-01-03 09:55:12 +0100 | [diff] [blame] | 757 | status = _nfs4_proc_open_confirm(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | if (status != 0) |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 759 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 761 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 763 | return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 764 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) |
| 768 | { |
| 769 | struct nfs_access_entry cache; |
| 770 | int mask = 0; |
| 771 | int status; |
| 772 | |
| 773 | if (openflags & FMODE_READ) |
| 774 | mask |= MAY_READ; |
| 775 | if (openflags & FMODE_WRITE) |
| 776 | mask |= MAY_WRITE; |
| 777 | status = nfs_access_get_cached(inode, cred, &cache); |
| 778 | if (status == 0) |
| 779 | goto out; |
| 780 | |
| 781 | /* Be clever: ask server to check for all possible rights */ |
| 782 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; |
| 783 | cache.cred = cred; |
| 784 | cache.jiffies = jiffies; |
| 785 | status = _nfs4_proc_access(inode, &cache); |
| 786 | if (status != 0) |
| 787 | return status; |
| 788 | nfs_access_add_cache(inode, &cache); |
| 789 | out: |
| 790 | if ((cache.mask & mask) == mask) |
| 791 | return 0; |
| 792 | return -EACCES; |
| 793 | } |
| 794 | |
Trond Myklebust | 10afec9 | 2007-05-14 17:16:04 -0400 | [diff] [blame] | 795 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 796 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 797 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 6b30954 | 2006-09-14 14:03:14 -0400 | [diff] [blame] | 798 | int ret; |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 799 | |
Trond Myklebust | 6b30954 | 2006-09-14 14:03:14 -0400 | [diff] [blame] | 800 | for (;;) { |
| 801 | ret = nfs4_wait_clnt_recover(server->client, clp); |
| 802 | if (ret != 0) |
| 803 | return ret; |
| 804 | if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 805 | break; |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 806 | nfs4_schedule_state_recovery(clp); |
Trond Myklebust | 6b30954 | 2006-09-14 14:03:14 -0400 | [diff] [blame] | 807 | } |
| 808 | return 0; |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 809 | } |
| 810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | /* |
| 812 | * OPEN_EXPIRED: |
| 813 | * reclaim state on the server after a network partition. |
| 814 | * Assumes caller holds the appropriate lock |
| 815 | */ |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 816 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | struct inode *inode = state->inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 820 | struct nfs4_opendata *opendata; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 821 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 822 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
| 824 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 825 | ret = _nfs4_do_access(inode, ctx->cred, openflags); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 826 | if (ret < 0) |
| 827 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
| 829 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 830 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 832 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 833 | if (opendata == NULL) |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 834 | return -ENOMEM; |
| 835 | ret = nfs4_open_recover(opendata, state); |
| 836 | if (ret == -ESTALE) { |
| 837 | /* Invalidate the state owner so we don't ever use it again */ |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 838 | nfs4_drop_state_owner(state->owner); |
| 839 | d_drop(ctx->path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 841 | nfs4_opendata_free(opendata); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 842 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 845 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 846 | { |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 847 | struct nfs_server *server = NFS_SERVER(state->inode); |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 848 | struct nfs4_exception exception = { }; |
| 849 | int err; |
| 850 | |
| 851 | do { |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 852 | err = _nfs4_open_expired(ctx, state); |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 853 | if (err == -NFS4ERR_DELAY) |
| 854 | nfs4_handle_exception(server, err, &exception); |
| 855 | } while (exception.retry); |
| 856 | return err; |
| 857 | } |
| 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 860 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | struct nfs_open_context *ctx; |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 862 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 864 | ctx = nfs4_state_find_open_context(state); |
| 865 | if (IS_ERR(ctx)) |
| 866 | return PTR_ERR(ctx); |
Trond Myklebust | 539cd03 | 2007-06-05 11:46:42 -0400 | [diff] [blame] | 867 | ret = nfs4_do_open_expired(ctx, state); |
Trond Myklebust | 864472e | 2006-01-03 09:55:15 +0100 | [diff] [blame] | 868 | put_nfs_open_context(ctx); |
| 869 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | /* |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 873 | * Returns a referenced nfs4_state if there is an open delegation on the file |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | */ |
| 875 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) |
| 876 | { |
| 877 | struct nfs_delegation *delegation; |
| 878 | struct nfs_server *server = NFS_SERVER(inode); |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 879 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | struct nfs_inode *nfsi = NFS_I(inode); |
| 881 | struct nfs4_state_owner *sp = NULL; |
| 882 | struct nfs4_state *state = NULL; |
| 883 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); |
| 884 | int err; |
| 885 | |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 886 | err = -ENOMEM; |
| 887 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 888 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); |
| 889 | return err; |
| 890 | } |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 891 | err = nfs4_recover_expired_lease(server); |
| 892 | if (err != 0) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 893 | goto out_put_state_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | /* Protect against reboot recovery - NOTE ORDER! */ |
| 895 | down_read(&clp->cl_sem); |
| 896 | /* Protect against delegation recall */ |
| 897 | down_read(&nfsi->rwsem); |
| 898 | delegation = NFS_I(inode)->delegation; |
| 899 | err = -ENOENT; |
| 900 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) |
| 901 | goto out_err; |
| 902 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | state = nfs4_get_open_state(inode, sp); |
| 904 | if (state == NULL) |
| 905 | goto out_err; |
| 906 | |
| 907 | err = -ENOENT; |
| 908 | if ((state->state & open_flags) == open_flags) { |
| 909 | spin_lock(&inode->i_lock); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 910 | update_open_stateflags(state, open_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | spin_unlock(&inode->i_lock); |
| 912 | goto out_ok; |
| 913 | } else if (state->state != 0) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 914 | goto out_put_open_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | lock_kernel(); |
| 917 | err = _nfs4_do_access(inode, cred, open_flags); |
| 918 | unlock_kernel(); |
| 919 | if (err != 0) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 920 | goto out_put_open_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | set_bit(NFS_DELEGATED_STATE, &state->flags); |
| 922 | update_open_stateid(state, &delegation->stateid, open_flags); |
| 923 | out_ok: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | nfs4_put_state_owner(sp); |
| 925 | up_read(&nfsi->rwsem); |
| 926 | up_read(&clp->cl_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | *res = state; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 928 | return 0; |
| 929 | out_put_open_state: |
| 930 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | up_read(&nfsi->rwsem); |
| 933 | up_read(&clp->cl_sem); |
Trond Myklebust | b8e5c4c | 2005-10-18 14:20:20 -0700 | [diff] [blame] | 934 | if (err != -EACCES) |
| 935 | nfs_inode_return_delegation(inode); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 936 | out_put_state_owner: |
| 937 | nfs4_put_state_owner(sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | return err; |
| 939 | } |
| 940 | |
| 941 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) |
| 942 | { |
| 943 | struct nfs4_exception exception = { }; |
Trond Myklebust | a162a6b | 2006-03-20 13:44:10 -0500 | [diff] [blame] | 944 | struct nfs4_state *res = ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | int err; |
| 946 | |
| 947 | do { |
| 948 | err = _nfs4_open_delegated(inode, flags, cred, &res); |
| 949 | if (err == 0) |
| 950 | break; |
| 951 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), |
| 952 | err, &exception)); |
| 953 | } while (exception.retry); |
| 954 | return res; |
| 955 | } |
| 956 | |
| 957 | /* |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 958 | * Returns a referenced nfs4_state |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | */ |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 960 | static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | { |
| 962 | struct nfs4_state_owner *sp; |
| 963 | struct nfs4_state *state = NULL; |
| 964 | struct nfs_server *server = NFS_SERVER(dir); |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 965 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 966 | struct nfs4_opendata *opendata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
| 969 | /* Protect against reboot recovery conflicts */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | status = -ENOMEM; |
| 971 | if (!(sp = nfs4_get_state_owner(server, cred))) { |
| 972 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
| 973 | goto out_err; |
| 974 | } |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 975 | status = nfs4_recover_expired_lease(server); |
| 976 | if (status != 0) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 977 | goto err_put_state_owner; |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 978 | down_read(&clp->cl_sem); |
| 979 | status = -ENOMEM; |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 980 | opendata = nfs4_opendata_alloc(path, sp, flags, sattr); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 981 | if (opendata == NULL) |
Trond Myklebust | 76723de | 2006-09-15 08:11:51 -0400 | [diff] [blame] | 982 | goto err_release_rwsem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 984 | status = _nfs4_proc_open(opendata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (status != 0) |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 986 | goto err_opendata_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
| 988 | status = -ENOMEM; |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 989 | state = nfs4_opendata_to_nfs4_state(opendata); |
| 990 | if (state == NULL) |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 991 | goto err_opendata_free; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 992 | if (opendata->o_res.delegation_type != 0) |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 993 | nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 994 | nfs4_opendata_free(opendata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | nfs4_put_state_owner(sp); |
| 996 | up_read(&clp->cl_sem); |
| 997 | *res = state; |
| 998 | return 0; |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 999 | err_opendata_free: |
| 1000 | nfs4_opendata_free(opendata); |
Trond Myklebust | 76723de | 2006-09-15 08:11:51 -0400 | [diff] [blame] | 1001 | err_release_rwsem: |
| 1002 | up_read(&clp->cl_sem); |
Trond Myklebust | e56e0b78 | 2006-01-03 09:55:08 +0100 | [diff] [blame] | 1003 | err_put_state_owner: |
| 1004 | nfs4_put_state_owner(sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | *res = NULL; |
| 1007 | return status; |
| 1008 | } |
| 1009 | |
| 1010 | |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1011 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | { |
| 1013 | struct nfs4_exception exception = { }; |
| 1014 | struct nfs4_state *res; |
| 1015 | int status; |
| 1016 | |
| 1017 | do { |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1018 | status = _nfs4_do_open(dir, path, flags, sattr, cred, &res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (status == 0) |
| 1020 | break; |
| 1021 | /* NOTE: BAD_SEQID means the server and client disagree about the |
| 1022 | * book-keeping w.r.t. state-changing operations |
| 1023 | * (OPEN/CLOSE/LOCK/LOCKU...) |
| 1024 | * It is actually a sign of a bug on the client or on the server. |
| 1025 | * |
| 1026 | * If we receive a BAD_SEQID error in the particular case of |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1027 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | * have unhashed the old state_owner for us, and that we can |
| 1029 | * therefore safely retry using a new one. We should still warn |
| 1030 | * the user though... |
| 1031 | */ |
| 1032 | if (status == -NFS4ERR_BAD_SEQID) { |
| 1033 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); |
| 1034 | exception.retry = 1; |
| 1035 | continue; |
| 1036 | } |
Trond Myklebust | 550f574 | 2005-10-18 14:20:21 -0700 | [diff] [blame] | 1037 | /* |
| 1038 | * BAD_STATEID on OPEN means that the server cancelled our |
| 1039 | * state before it received the OPEN_CONFIRM. |
| 1040 | * Recover by retrying the request as per the discussion |
| 1041 | * on Page 181 of RFC3530. |
| 1042 | */ |
| 1043 | if (status == -NFS4ERR_BAD_STATEID) { |
| 1044 | exception.retry = 1; |
| 1045 | continue; |
| 1046 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
| 1048 | status, &exception)); |
| 1049 | } while (exception.retry); |
| 1050 | return res; |
| 1051 | } |
| 1052 | |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1053 | static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
| 1054 | struct iattr *sattr, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | { |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1056 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | struct nfs_setattrargs arg = { |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1058 | .fh = NFS_FH(inode), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | .iap = sattr, |
| 1060 | .server = server, |
| 1061 | .bitmask = server->attr_bitmask, |
| 1062 | }; |
| 1063 | struct nfs_setattrres res = { |
| 1064 | .fattr = fattr, |
| 1065 | .server = server, |
| 1066 | }; |
| 1067 | struct rpc_message msg = { |
| 1068 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
| 1069 | .rpc_argp = &arg, |
| 1070 | .rpc_resp = &res, |
| 1071 | }; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 1072 | unsigned long timestamp = jiffies; |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1073 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1075 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1077 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
| 1078 | /* Use that stateid */ |
| 1079 | } else if (state != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | msg.rpc_cred = state->owner->so_cred; |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1081 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
| 1082 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
| 1084 | |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1085 | status = rpc_call_sync(server->client, &msg, 0); |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 1086 | if (status == 0 && state != NULL) |
| 1087 | renew_lease(server, timestamp); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1088 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
| 1090 | |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1091 | static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, |
| 1092 | struct iattr *sattr, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1094 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | struct nfs4_exception exception = { }; |
| 1096 | int err; |
| 1097 | do { |
| 1098 | err = nfs4_handle_exception(server, |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1099 | _nfs4_do_setattr(inode, fattr, sattr, state), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | &exception); |
| 1101 | } while (exception.retry); |
| 1102 | return err; |
| 1103 | } |
| 1104 | |
| 1105 | struct nfs4_closedata { |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1106 | struct path path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | struct inode *inode; |
| 1108 | struct nfs4_state *state; |
| 1109 | struct nfs_closeargs arg; |
| 1110 | struct nfs_closeres res; |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 1111 | struct nfs_fattr fattr; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 1112 | unsigned long timestamp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | }; |
| 1114 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1115 | static void nfs4_free_closedata(void *data) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1116 | { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1117 | struct nfs4_closedata *calldata = data; |
| 1118 | struct nfs4_state_owner *sp = calldata->state->owner; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1119 | |
| 1120 | nfs4_put_open_state(calldata->state); |
| 1121 | nfs_free_seqid(calldata->arg.seqid); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1122 | nfs4_put_state_owner(sp); |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1123 | dput(calldata->path.dentry); |
| 1124 | mntput(calldata->path.mnt); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1125 | kfree(calldata); |
| 1126 | } |
| 1127 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1128 | static void nfs4_close_done(struct rpc_task *task, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1130 | struct nfs4_closedata *calldata = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | struct nfs4_state *state = calldata->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
| 1133 | |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 1134 | if (RPC_ASSASSINATED(task)) |
| 1135 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | /* hmm. we are done with the inode, and in the process of freeing |
| 1137 | * the state_owner. we keep this around to process errors |
| 1138 | */ |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1139 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | switch (task->tk_status) { |
| 1141 | case 0: |
| 1142 | memcpy(&state->stateid, &calldata->res.stateid, |
| 1143 | sizeof(state->stateid)); |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 1144 | renew_lease(server, calldata->timestamp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | break; |
| 1146 | case -NFS4ERR_STALE_STATEID: |
| 1147 | case -NFS4ERR_EXPIRED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | break; |
| 1149 | default: |
| 1150 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
| 1151 | rpc_restart_call(task); |
| 1152 | return; |
| 1153 | } |
| 1154 | } |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 1155 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
| 1157 | |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 1158 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | { |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 1160 | struct nfs4_closedata *calldata = data; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1161 | struct nfs4_state *state = calldata->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | struct rpc_message msg = { |
| 1163 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
| 1164 | .rpc_argp = &calldata->arg, |
| 1165 | .rpc_resp = &calldata->res, |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1166 | .rpc_cred = state->owner->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | }; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 1168 | int mode = 0, old_mode; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1169 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1170 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1171 | return; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1172 | /* Recalculate the new open mode in case someone reopened the file |
| 1173 | * while we were waiting in line to be scheduled. |
| 1174 | */ |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 1175 | spin_lock(&state->owner->so_lock); |
| 1176 | spin_lock(&calldata->inode->i_lock); |
| 1177 | mode = old_mode = state->state; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 1178 | if (state->n_rdwr == 0) { |
| 1179 | if (state->n_rdonly == 0) |
| 1180 | mode &= ~FMODE_READ; |
| 1181 | if (state->n_wronly == 0) |
| 1182 | mode &= ~FMODE_WRITE; |
| 1183 | } |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 1184 | nfs4_state_set_mode_locked(state, mode); |
| 1185 | spin_unlock(&calldata->inode->i_lock); |
| 1186 | spin_unlock(&state->owner->so_lock); |
| 1187 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1188 | /* Note: exit _without_ calling nfs4_close_done */ |
| 1189 | task->tk_action = NULL; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1190 | return; |
| 1191 | } |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 1192 | nfs_fattr_init(calldata->res.fattr); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1193 | if (mode != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1195 | calldata->arg.open_flags = mode; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 1196 | calldata->timestamp = jiffies; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1197 | rpc_call_setup(task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1200 | static const struct rpc_call_ops nfs4_close_ops = { |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 1201 | .rpc_call_prepare = nfs4_close_prepare, |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 1202 | .rpc_call_done = nfs4_close_done, |
| 1203 | .rpc_release = nfs4_free_closedata, |
| 1204 | }; |
| 1205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | /* |
| 1207 | * It is possible for data to be read/written from a mem-mapped file |
| 1208 | * after the sys_close call (which hits the vfs layer as a flush). |
| 1209 | * This means that we can't safely call nfsv4 close on a file until |
| 1210 | * the inode is cleared. This in turn means that we are not good |
| 1211 | * NFSv4 citizens - we do not indicate to the server to update the file's |
| 1212 | * share state even when we are done with one of the three share |
| 1213 | * stateid's in the inode. |
| 1214 | * |
| 1215 | * NOTE: Caller must be holding the sp->so_owner semaphore! |
| 1216 | */ |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1217 | int nfs4_do_close(struct path *path, struct nfs4_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | { |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1219 | struct nfs_server *server = NFS_SERVER(state->inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | struct nfs4_closedata *calldata; |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1221 | int status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1223 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | if (calldata == NULL) |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1225 | goto out; |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1226 | calldata->inode = state->inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | calldata->state = state; |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1228 | calldata->arg.fh = NFS_FH(state->inode); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1229 | calldata->arg.stateid = &state->stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | /* Serialization for the sequence id */ |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1231 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1232 | if (calldata->arg.seqid == NULL) |
| 1233 | goto out_free_calldata; |
Trond Myklebust | 516a6af | 2005-10-27 22:12:41 -0400 | [diff] [blame] | 1234 | calldata->arg.bitmask = server->attr_bitmask; |
| 1235 | calldata->res.fattr = &calldata->fattr; |
| 1236 | calldata->res.server = server; |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1237 | calldata->path.mnt = mntget(path->mnt); |
| 1238 | calldata->path.dentry = dget(path->dentry); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1239 | |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 1240 | status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); |
Trond Myklebust | 9512135 | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1241 | if (status == 0) |
| 1242 | goto out; |
| 1243 | |
| 1244 | nfs_free_seqid(calldata->arg.seqid); |
| 1245 | out_free_calldata: |
| 1246 | kfree(calldata); |
| 1247 | out: |
| 1248 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | } |
| 1250 | |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1251 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state) |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1252 | { |
| 1253 | struct file *filp; |
| 1254 | |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1255 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1256 | if (!IS_ERR(filp)) { |
| 1257 | struct nfs_open_context *ctx; |
| 1258 | ctx = (struct nfs_open_context *)filp->private_data; |
| 1259 | ctx->state = state; |
Trond Myklebust | 95cf959 | 2006-04-18 13:14:06 -0400 | [diff] [blame] | 1260 | return 0; |
| 1261 | } |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1262 | nfs4_close_state(path, state, nd->intent.open.flags); |
Trond Myklebust | 95cf959 | 2006-04-18 13:14:06 -0400 | [diff] [blame] | 1263 | return PTR_ERR(filp); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | struct dentry * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
| 1268 | { |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1269 | struct path path = { |
| 1270 | .mnt = nd->mnt, |
| 1271 | .dentry = dentry, |
| 1272 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | struct iattr attr; |
| 1274 | struct rpc_cred *cred; |
| 1275 | struct nfs4_state *state; |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1276 | struct dentry *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
| 1278 | if (nd->flags & LOOKUP_CREATE) { |
| 1279 | attr.ia_mode = nd->intent.open.create_mode; |
| 1280 | attr.ia_valid = ATTR_MODE; |
| 1281 | if (!IS_POSIXACL(dir)) |
| 1282 | attr.ia_mode &= ~current->fs->umask; |
| 1283 | } else { |
| 1284 | attr.ia_valid = 0; |
| 1285 | BUG_ON(nd->intent.open.flags & O_CREAT); |
| 1286 | } |
| 1287 | |
David Howells | 1f16341 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 1288 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | if (IS_ERR(cred)) |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1290 | return (struct dentry *)cred; |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1291 | state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | put_rpccred(cred); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1293 | if (IS_ERR(state)) { |
| 1294 | if (PTR_ERR(state) == -ENOENT) |
| 1295 | d_add(dentry, NULL); |
| 1296 | return (struct dentry *)state; |
| 1297 | } |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 1298 | res = d_add_unique(dentry, igrab(state->inode)); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1299 | if (res != NULL) |
| 1300 | dentry = res; |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1301 | nfs4_intent_set_file(nd, &path, state); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1302 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | } |
| 1304 | |
| 1305 | int |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1306 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | { |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1308 | struct path path = { |
| 1309 | .mnt = nd->mnt, |
| 1310 | .dentry = dentry, |
| 1311 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | struct rpc_cred *cred; |
| 1313 | struct nfs4_state *state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | |
David Howells | 1f16341 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 1315 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | if (IS_ERR(cred)) |
| 1317 | return PTR_ERR(cred); |
| 1318 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); |
| 1319 | if (IS_ERR(state)) |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1320 | state = nfs4_do_open(dir, &path, openflags, NULL, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | put_rpccred(cred); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1322 | if (IS_ERR(state)) { |
| 1323 | switch (PTR_ERR(state)) { |
| 1324 | case -EPERM: |
| 1325 | case -EACCES: |
| 1326 | case -EDQUOT: |
| 1327 | case -ENOSPC: |
| 1328 | case -EROFS: |
| 1329 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); |
| 1330 | return 1; |
Chuck Lever | b87c0ad | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 1331 | default: |
| 1332 | goto out_drop; |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1333 | } |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1334 | } |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 1335 | if (state->inode == dentry->d_inode) { |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1336 | nfs4_intent_set_file(nd, &path, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | return 1; |
| 1338 | } |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1339 | nfs4_close_state(&path, state, openflags); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1340 | out_drop: |
| 1341 | d_drop(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | return 0; |
| 1343 | } |
| 1344 | |
| 1345 | |
| 1346 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
| 1347 | { |
| 1348 | struct nfs4_server_caps_res res = {}; |
| 1349 | struct rpc_message msg = { |
| 1350 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
| 1351 | .rpc_argp = fhandle, |
| 1352 | .rpc_resp = &res, |
| 1353 | }; |
| 1354 | int status; |
| 1355 | |
| 1356 | status = rpc_call_sync(server->client, &msg, 0); |
| 1357 | if (status == 0) { |
| 1358 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
| 1359 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
| 1360 | server->caps |= NFS_CAP_ACLS; |
| 1361 | if (res.has_links != 0) |
| 1362 | server->caps |= NFS_CAP_HARDLINKS; |
| 1363 | if (res.has_symlinks != 0) |
| 1364 | server->caps |= NFS_CAP_SYMLINKS; |
| 1365 | server->acl_bitmask = res.acl_bitmask; |
| 1366 | } |
| 1367 | return status; |
| 1368 | } |
| 1369 | |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1370 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | { |
| 1372 | struct nfs4_exception exception = { }; |
| 1373 | int err; |
| 1374 | do { |
| 1375 | err = nfs4_handle_exception(server, |
| 1376 | _nfs4_server_capabilities(server, fhandle), |
| 1377 | &exception); |
| 1378 | } while (exception.retry); |
| 1379 | return err; |
| 1380 | } |
| 1381 | |
| 1382 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 1383 | struct nfs_fsinfo *info) |
| 1384 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | struct nfs4_lookup_root_arg args = { |
| 1386 | .bitmask = nfs4_fattr_bitmap, |
| 1387 | }; |
| 1388 | struct nfs4_lookup_res res = { |
| 1389 | .server = server, |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1390 | .fattr = info->fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | .fh = fhandle, |
| 1392 | }; |
| 1393 | struct rpc_message msg = { |
| 1394 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
| 1395 | .rpc_argp = &args, |
| 1396 | .rpc_resp = &res, |
| 1397 | }; |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1398 | nfs_fattr_init(info->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | return rpc_call_sync(server->client, &msg, 0); |
| 1400 | } |
| 1401 | |
| 1402 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
| 1403 | struct nfs_fsinfo *info) |
| 1404 | { |
| 1405 | struct nfs4_exception exception = { }; |
| 1406 | int err; |
| 1407 | do { |
| 1408 | err = nfs4_handle_exception(server, |
| 1409 | _nfs4_lookup_root(server, fhandle, info), |
| 1410 | &exception); |
| 1411 | } while (exception.retry); |
| 1412 | return err; |
| 1413 | } |
| 1414 | |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1415 | /* |
| 1416 | * get the file handle for the "/" directory on the server |
| 1417 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
David Howells | 54ceac4 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1419 | struct nfs_fsinfo *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | int status; |
| 1422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | status = nfs4_lookup_root(server, fhandle, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | if (status == 0) |
| 1425 | status = nfs4_server_capabilities(server, fhandle); |
| 1426 | if (status == 0) |
| 1427 | status = nfs4_do_fsinfo(server, fhandle, info); |
Trond Myklebust | c12e87f | 2006-03-13 21:20:47 -0800 | [diff] [blame] | 1428 | return nfs4_map_errors(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | } |
| 1430 | |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 1431 | /* |
| 1432 | * Get locations and (maybe) other attributes of a referral. |
| 1433 | * Note that we'll actually follow the referral later when |
| 1434 | * we detect fsid mismatch in inode revalidation |
| 1435 | */ |
| 1436 | static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
| 1437 | { |
| 1438 | int status = -ENOMEM; |
| 1439 | struct page *page = NULL; |
| 1440 | struct nfs4_fs_locations *locations = NULL; |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 1441 | |
| 1442 | page = alloc_page(GFP_KERNEL); |
| 1443 | if (page == NULL) |
| 1444 | goto out; |
| 1445 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 1446 | if (locations == NULL) |
| 1447 | goto out; |
| 1448 | |
Trond Myklebust | c228fd3 | 2007-01-13 02:28:11 -0500 | [diff] [blame] | 1449 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 1450 | if (status != 0) |
| 1451 | goto out; |
| 1452 | /* Make sure server returned a different fsid for the referral */ |
| 1453 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
| 1454 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name); |
| 1455 | status = -EIO; |
| 1456 | goto out; |
| 1457 | } |
| 1458 | |
| 1459 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
| 1460 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; |
| 1461 | if (!fattr->mode) |
| 1462 | fattr->mode = S_IFDIR; |
| 1463 | memset(fhandle, 0, sizeof(struct nfs_fh)); |
| 1464 | out: |
| 1465 | if (page) |
| 1466 | __free_page(page); |
| 1467 | if (locations) |
| 1468 | kfree(locations); |
| 1469 | return status; |
| 1470 | } |
| 1471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1473 | { |
| 1474 | struct nfs4_getattr_arg args = { |
| 1475 | .fh = fhandle, |
| 1476 | .bitmask = server->attr_bitmask, |
| 1477 | }; |
| 1478 | struct nfs4_getattr_res res = { |
| 1479 | .fattr = fattr, |
| 1480 | .server = server, |
| 1481 | }; |
| 1482 | struct rpc_message msg = { |
| 1483 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
| 1484 | .rpc_argp = &args, |
| 1485 | .rpc_resp = &res, |
| 1486 | }; |
| 1487 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1488 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | return rpc_call_sync(server->client, &msg, 0); |
| 1490 | } |
| 1491 | |
| 1492 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1493 | { |
| 1494 | struct nfs4_exception exception = { }; |
| 1495 | int err; |
| 1496 | do { |
| 1497 | err = nfs4_handle_exception(server, |
| 1498 | _nfs4_proc_getattr(server, fhandle, fattr), |
| 1499 | &exception); |
| 1500 | } while (exception.retry); |
| 1501 | return err; |
| 1502 | } |
| 1503 | |
| 1504 | /* |
| 1505 | * The file is not closed if it is opened due to the a request to change |
| 1506 | * the size of the file. The open call will not be needed once the |
| 1507 | * VFS layer lookup-intents are implemented. |
| 1508 | * |
| 1509 | * Close is called when the inode is destroyed. |
| 1510 | * If we haven't opened the file for O_WRONLY, we |
| 1511 | * need to in the size_change case to obtain a stateid. |
| 1512 | * |
| 1513 | * Got race? |
| 1514 | * Because OPEN is always done by name in nfsv4, it is |
| 1515 | * possible that we opened a different file by the same |
| 1516 | * name. We can recognize this race condition, but we |
| 1517 | * can't do anything about it besides returning an error. |
| 1518 | * |
| 1519 | * This will be fixed with VFS changes (lookup-intent). |
| 1520 | */ |
| 1521 | static int |
| 1522 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
| 1523 | struct iattr *sattr) |
| 1524 | { |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1525 | struct rpc_cred *cred; |
| 1526 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1527 | struct nfs_open_context *ctx; |
| 1528 | struct nfs4_state *state = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | int status; |
| 1530 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1531 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
David Howells | 1f16341 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 1533 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1534 | if (IS_ERR(cred)) |
| 1535 | return PTR_ERR(cred); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1536 | |
| 1537 | /* Search for an existing open(O_WRITE) file */ |
| 1538 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); |
| 1539 | if (ctx != NULL) |
| 1540 | state = ctx->state; |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1541 | |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1542 | status = nfs4_do_setattr(inode, fattr, sattr, state); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1543 | if (status == 0) |
| 1544 | nfs_setattr_update_inode(inode, sattr); |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 1545 | if (ctx != NULL) |
| 1546 | put_nfs_open_context(ctx); |
Trond Myklebust | 08e9eac | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 1547 | put_rpccred(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | return status; |
| 1549 | } |
| 1550 | |
David Howells | 2b3de44 | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 1551 | static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, |
| 1552 | struct qstr *name, struct nfs_fh *fhandle, |
| 1553 | struct nfs_fattr *fattr) |
| 1554 | { |
| 1555 | int status; |
| 1556 | struct nfs4_lookup_arg args = { |
| 1557 | .bitmask = server->attr_bitmask, |
| 1558 | .dir_fh = dirfh, |
| 1559 | .name = name, |
| 1560 | }; |
| 1561 | struct nfs4_lookup_res res = { |
| 1562 | .server = server, |
| 1563 | .fattr = fattr, |
| 1564 | .fh = fhandle, |
| 1565 | }; |
| 1566 | struct rpc_message msg = { |
| 1567 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 1568 | .rpc_argp = &args, |
| 1569 | .rpc_resp = &res, |
| 1570 | }; |
| 1571 | |
| 1572 | nfs_fattr_init(fattr); |
| 1573 | |
| 1574 | dprintk("NFS call lookupfh %s\n", name->name); |
| 1575 | status = rpc_call_sync(server->client, &msg, 0); |
| 1576 | dprintk("NFS reply lookupfh: %d\n", status); |
| 1577 | if (status == -NFS4ERR_MOVED) |
| 1578 | status = -EREMOTE; |
| 1579 | return status; |
| 1580 | } |
| 1581 | |
| 1582 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, |
| 1583 | struct qstr *name, struct nfs_fh *fhandle, |
| 1584 | struct nfs_fattr *fattr) |
| 1585 | { |
| 1586 | struct nfs4_exception exception = { }; |
| 1587 | int err; |
| 1588 | do { |
| 1589 | err = nfs4_handle_exception(server, |
| 1590 | _nfs4_proc_lookupfh(server, dirfh, name, |
| 1591 | fhandle, fattr), |
| 1592 | &exception); |
| 1593 | } while (exception.retry); |
| 1594 | return err; |
| 1595 | } |
| 1596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, |
| 1598 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1599 | { |
| 1600 | int status; |
| 1601 | struct nfs_server *server = NFS_SERVER(dir); |
| 1602 | struct nfs4_lookup_arg args = { |
| 1603 | .bitmask = server->attr_bitmask, |
| 1604 | .dir_fh = NFS_FH(dir), |
| 1605 | .name = name, |
| 1606 | }; |
| 1607 | struct nfs4_lookup_res res = { |
| 1608 | .server = server, |
| 1609 | .fattr = fattr, |
| 1610 | .fh = fhandle, |
| 1611 | }; |
| 1612 | struct rpc_message msg = { |
| 1613 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
| 1614 | .rpc_argp = &args, |
| 1615 | .rpc_resp = &res, |
| 1616 | }; |
| 1617 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 1618 | nfs_fattr_init(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
| 1620 | dprintk("NFS call lookup %s\n", name->name); |
| 1621 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 1622 | if (status == -NFS4ERR_MOVED) |
| 1623 | status = nfs4_get_referral(dir, name, fattr, fhandle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | dprintk("NFS reply lookup: %d\n", status); |
| 1625 | return status; |
| 1626 | } |
| 1627 | |
| 1628 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
| 1629 | { |
| 1630 | struct nfs4_exception exception = { }; |
| 1631 | int err; |
| 1632 | do { |
| 1633 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1634 | _nfs4_proc_lookup(dir, name, fhandle, fattr), |
| 1635 | &exception); |
| 1636 | } while (exception.retry); |
| 1637 | return err; |
| 1638 | } |
| 1639 | |
| 1640 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 1641 | { |
| 1642 | struct nfs4_accessargs args = { |
| 1643 | .fh = NFS_FH(inode), |
| 1644 | }; |
| 1645 | struct nfs4_accessres res = { 0 }; |
| 1646 | struct rpc_message msg = { |
| 1647 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
| 1648 | .rpc_argp = &args, |
| 1649 | .rpc_resp = &res, |
| 1650 | .rpc_cred = entry->cred, |
| 1651 | }; |
| 1652 | int mode = entry->mask; |
| 1653 | int status; |
| 1654 | |
| 1655 | /* |
| 1656 | * Determine which access bits we want to ask for... |
| 1657 | */ |
| 1658 | if (mode & MAY_READ) |
| 1659 | args.access |= NFS4_ACCESS_READ; |
| 1660 | if (S_ISDIR(inode->i_mode)) { |
| 1661 | if (mode & MAY_WRITE) |
| 1662 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; |
| 1663 | if (mode & MAY_EXEC) |
| 1664 | args.access |= NFS4_ACCESS_LOOKUP; |
| 1665 | } else { |
| 1666 | if (mode & MAY_WRITE) |
| 1667 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; |
| 1668 | if (mode & MAY_EXEC) |
| 1669 | args.access |= NFS4_ACCESS_EXECUTE; |
| 1670 | } |
| 1671 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 1672 | if (!status) { |
| 1673 | entry->mask = 0; |
| 1674 | if (res.access & NFS4_ACCESS_READ) |
| 1675 | entry->mask |= MAY_READ; |
| 1676 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) |
| 1677 | entry->mask |= MAY_WRITE; |
| 1678 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) |
| 1679 | entry->mask |= MAY_EXEC; |
| 1680 | } |
| 1681 | return status; |
| 1682 | } |
| 1683 | |
| 1684 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
| 1685 | { |
| 1686 | struct nfs4_exception exception = { }; |
| 1687 | int err; |
| 1688 | do { |
| 1689 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1690 | _nfs4_proc_access(inode, entry), |
| 1691 | &exception); |
| 1692 | } while (exception.retry); |
| 1693 | return err; |
| 1694 | } |
| 1695 | |
| 1696 | /* |
| 1697 | * TODO: For the time being, we don't try to get any attributes |
| 1698 | * along with any of the zero-copy operations READ, READDIR, |
| 1699 | * READLINK, WRITE. |
| 1700 | * |
| 1701 | * In the case of the first three, we want to put the GETATTR |
| 1702 | * after the read-type operation -- this is because it is hard |
| 1703 | * to predict the length of a GETATTR response in v4, and thus |
| 1704 | * align the READ data correctly. This means that the GETATTR |
| 1705 | * may end up partially falling into the page cache, and we should |
| 1706 | * shift it into the 'tail' of the xdr_buf before processing. |
| 1707 | * To do this efficiently, we need to know the total length |
| 1708 | * of data received, which doesn't seem to be available outside |
| 1709 | * of the RPC layer. |
| 1710 | * |
| 1711 | * In the case of WRITE, we also want to put the GETATTR after |
| 1712 | * the operation -- in this case because we want to make sure |
| 1713 | * we get the post-operation mtime and size. This means that |
| 1714 | * we can't use xdr_encode_pages() as written: we need a variant |
| 1715 | * of it which would leave room in the 'tail' iovec. |
| 1716 | * |
| 1717 | * Both of these changes to the XDR layer would in fact be quite |
| 1718 | * minor, but I decided to leave them for a subsequent patch. |
| 1719 | */ |
| 1720 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 1721 | unsigned int pgbase, unsigned int pglen) |
| 1722 | { |
| 1723 | struct nfs4_readlink args = { |
| 1724 | .fh = NFS_FH(inode), |
| 1725 | .pgbase = pgbase, |
| 1726 | .pglen = pglen, |
| 1727 | .pages = &page, |
| 1728 | }; |
| 1729 | struct rpc_message msg = { |
| 1730 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
| 1731 | .rpc_argp = &args, |
| 1732 | .rpc_resp = NULL, |
| 1733 | }; |
| 1734 | |
| 1735 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 1736 | } |
| 1737 | |
| 1738 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
| 1739 | unsigned int pgbase, unsigned int pglen) |
| 1740 | { |
| 1741 | struct nfs4_exception exception = { }; |
| 1742 | int err; |
| 1743 | do { |
| 1744 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1745 | _nfs4_proc_readlink(inode, page, pgbase, pglen), |
| 1746 | &exception); |
| 1747 | } while (exception.retry); |
| 1748 | return err; |
| 1749 | } |
| 1750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | /* |
| 1752 | * Got race? |
| 1753 | * We will need to arrange for the VFS layer to provide an atomic open. |
| 1754 | * Until then, this create/open method is prone to inefficiency and race |
| 1755 | * conditions due to the lookup, create, and open VFS calls from sys_open() |
| 1756 | * placed on the wire. |
| 1757 | * |
| 1758 | * Given the above sorry state of affairs, I'm simply sending an OPEN. |
| 1759 | * The file will be opened again in the subsequent VFS open call |
| 1760 | * (nfs4_proc_file_open). |
| 1761 | * |
| 1762 | * The open for read will just hang around to be used by any process that |
| 1763 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. |
| 1764 | */ |
| 1765 | |
| 1766 | static int |
| 1767 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1768 | int flags, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | { |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1770 | struct path path = { |
| 1771 | .mnt = nd->mnt, |
| 1772 | .dentry = dentry, |
| 1773 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | struct nfs4_state *state; |
| 1775 | struct rpc_cred *cred; |
| 1776 | int status = 0; |
| 1777 | |
David Howells | 1f16341 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 1778 | cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | if (IS_ERR(cred)) { |
| 1780 | status = PTR_ERR(cred); |
| 1781 | goto out; |
| 1782 | } |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1783 | state = nfs4_do_open(dir, &path, flags, sattr, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | put_rpccred(cred); |
| 1785 | if (IS_ERR(state)) { |
| 1786 | status = PTR_ERR(state); |
| 1787 | goto out; |
| 1788 | } |
Trond Myklebust | 24ac23a | 2006-01-03 09:55:11 +0100 | [diff] [blame] | 1789 | d_instantiate(dentry, igrab(state->inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | if (flags & O_EXCL) { |
| 1791 | struct nfs_fattr fattr; |
Trond Myklebust | 3e4f629 | 2006-03-20 13:44:46 -0500 | [diff] [blame] | 1792 | status = nfs4_do_setattr(state->inode, &fattr, sattr, state); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1793 | if (status == 0) |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 1794 | nfs_setattr_update_inode(state->inode, sattr); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1795 | } |
Trond Myklebust | ad389da | 2007-06-05 12:30:00 -0400 | [diff] [blame] | 1796 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1797 | status = nfs4_intent_set_file(nd, &path, state); |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 1798 | else |
Trond Myklebust | 4a35bd4 | 2007-06-05 10:31:33 -0400 | [diff] [blame^] | 1799 | nfs4_close_state(&path, state, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | out: |
| 1801 | return status; |
| 1802 | } |
| 1803 | |
| 1804 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 1805 | { |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1806 | struct nfs_server *server = NFS_SERVER(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | struct nfs4_remove_arg args = { |
| 1808 | .fh = NFS_FH(dir), |
| 1809 | .name = name, |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1810 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | }; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1812 | struct nfs_fattr dir_attr; |
| 1813 | struct nfs4_remove_res res = { |
| 1814 | .server = server, |
| 1815 | .dir_attr = &dir_attr, |
| 1816 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | struct rpc_message msg = { |
| 1818 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
| 1819 | .rpc_argp = &args, |
| 1820 | .rpc_resp = &res, |
| 1821 | }; |
| 1822 | int status; |
| 1823 | |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1824 | nfs_fattr_init(res.dir_attr); |
| 1825 | status = rpc_call_sync(server->client, &msg, 0); |
| 1826 | if (status == 0) { |
| 1827 | update_changeattr(dir, &res.cinfo); |
| 1828 | nfs_post_op_update_inode(dir, res.dir_attr); |
| 1829 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | return status; |
| 1831 | } |
| 1832 | |
| 1833 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) |
| 1834 | { |
| 1835 | struct nfs4_exception exception = { }; |
| 1836 | int err; |
| 1837 | do { |
| 1838 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 1839 | _nfs4_proc_remove(dir, name), |
| 1840 | &exception); |
| 1841 | } while (exception.retry); |
| 1842 | return err; |
| 1843 | } |
| 1844 | |
| 1845 | struct unlink_desc { |
| 1846 | struct nfs4_remove_arg args; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1847 | struct nfs4_remove_res res; |
| 1848 | struct nfs_fattr dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | }; |
| 1850 | |
| 1851 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, |
| 1852 | struct qstr *name) |
| 1853 | { |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1854 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | struct unlink_desc *up; |
| 1856 | |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame] | 1857 | up = kmalloc(sizeof(*up), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | if (!up) |
| 1859 | return -ENOMEM; |
| 1860 | |
| 1861 | up->args.fh = NFS_FH(dir->d_inode); |
| 1862 | up->args.name = name; |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1863 | up->args.bitmask = server->attr_bitmask; |
| 1864 | up->res.server = server; |
| 1865 | up->res.dir_attr = &up->dir_attr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | |
| 1867 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
| 1868 | msg->rpc_argp = &up->args; |
| 1869 | msg->rpc_resp = &up->res; |
| 1870 | return 0; |
| 1871 | } |
| 1872 | |
| 1873 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) |
| 1874 | { |
| 1875 | struct rpc_message *msg = &task->tk_msg; |
| 1876 | struct unlink_desc *up; |
| 1877 | |
| 1878 | if (msg->rpc_resp != NULL) { |
| 1879 | up = container_of(msg->rpc_resp, struct unlink_desc, res); |
Trond Myklebust | 16e4295 | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 1880 | update_changeattr(dir->d_inode, &up->res.cinfo); |
| 1881 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | kfree(up); |
| 1883 | msg->rpc_resp = NULL; |
| 1884 | msg->rpc_argp = NULL; |
| 1885 | } |
| 1886 | return 0; |
| 1887 | } |
| 1888 | |
| 1889 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 1890 | struct inode *new_dir, struct qstr *new_name) |
| 1891 | { |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1892 | struct nfs_server *server = NFS_SERVER(old_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | struct nfs4_rename_arg arg = { |
| 1894 | .old_dir = NFS_FH(old_dir), |
| 1895 | .new_dir = NFS_FH(new_dir), |
| 1896 | .old_name = old_name, |
| 1897 | .new_name = new_name, |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1898 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | }; |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1900 | struct nfs_fattr old_fattr, new_fattr; |
| 1901 | struct nfs4_rename_res res = { |
| 1902 | .server = server, |
| 1903 | .old_fattr = &old_fattr, |
| 1904 | .new_fattr = &new_fattr, |
| 1905 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | struct rpc_message msg = { |
| 1907 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], |
| 1908 | .rpc_argp = &arg, |
| 1909 | .rpc_resp = &res, |
| 1910 | }; |
| 1911 | int status; |
| 1912 | |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1913 | nfs_fattr_init(res.old_fattr); |
| 1914 | nfs_fattr_init(res.new_fattr); |
| 1915 | status = rpc_call_sync(server->client, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | |
| 1917 | if (!status) { |
| 1918 | update_changeattr(old_dir, &res.old_cinfo); |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1919 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | update_changeattr(new_dir, &res.new_cinfo); |
Trond Myklebust | 6caf2c8 | 2005-10-27 22:12:43 -0400 | [diff] [blame] | 1921 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | } |
| 1923 | return status; |
| 1924 | } |
| 1925 | |
| 1926 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
| 1927 | struct inode *new_dir, struct qstr *new_name) |
| 1928 | { |
| 1929 | struct nfs4_exception exception = { }; |
| 1930 | int err; |
| 1931 | do { |
| 1932 | err = nfs4_handle_exception(NFS_SERVER(old_dir), |
| 1933 | _nfs4_proc_rename(old_dir, old_name, |
| 1934 | new_dir, new_name), |
| 1935 | &exception); |
| 1936 | } while (exception.retry); |
| 1937 | return err; |
| 1938 | } |
| 1939 | |
| 1940 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 1941 | { |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1942 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | struct nfs4_link_arg arg = { |
| 1944 | .fh = NFS_FH(inode), |
| 1945 | .dir_fh = NFS_FH(dir), |
| 1946 | .name = name, |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1947 | .bitmask = server->attr_bitmask, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | }; |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1949 | struct nfs_fattr fattr, dir_attr; |
| 1950 | struct nfs4_link_res res = { |
| 1951 | .server = server, |
| 1952 | .fattr = &fattr, |
| 1953 | .dir_attr = &dir_attr, |
| 1954 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | struct rpc_message msg = { |
| 1956 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
| 1957 | .rpc_argp = &arg, |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1958 | .rpc_resp = &res, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | }; |
| 1960 | int status; |
| 1961 | |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1962 | nfs_fattr_init(res.fattr); |
| 1963 | nfs_fattr_init(res.dir_attr); |
| 1964 | status = rpc_call_sync(server->client, &msg, 0); |
| 1965 | if (!status) { |
| 1966 | update_changeattr(dir, &res.cinfo); |
| 1967 | nfs_post_op_update_inode(dir, res.dir_attr); |
Trond Myklebust | 73a3d07 | 2006-05-25 01:40:47 -0400 | [diff] [blame] | 1968 | nfs_post_op_update_inode(inode, res.fattr); |
Trond Myklebust | 91ba2ee | 2005-10-27 22:12:42 -0400 | [diff] [blame] | 1969 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | |
| 1971 | return status; |
| 1972 | } |
| 1973 | |
| 1974 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) |
| 1975 | { |
| 1976 | struct nfs4_exception exception = { }; |
| 1977 | int err; |
| 1978 | do { |
| 1979 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 1980 | _nfs4_proc_link(inode, dir, name), |
| 1981 | &exception); |
| 1982 | } while (exception.retry); |
| 1983 | return err; |
| 1984 | } |
| 1985 | |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 1986 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
Chuck Lever | 94a6d75 | 2006-08-22 20:06:23 -0400 | [diff] [blame] | 1987 | struct page *page, unsigned int len, struct iattr *sattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | { |
| 1989 | struct nfs_server *server = NFS_SERVER(dir); |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 1990 | struct nfs_fh fhandle; |
| 1991 | struct nfs_fattr fattr, dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | struct nfs4_create_arg arg = { |
| 1993 | .dir_fh = NFS_FH(dir), |
| 1994 | .server = server, |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 1995 | .name = &dentry->d_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | .attrs = sattr, |
| 1997 | .ftype = NF4LNK, |
| 1998 | .bitmask = server->attr_bitmask, |
| 1999 | }; |
| 2000 | struct nfs4_create_res res = { |
| 2001 | .server = server, |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2002 | .fh = &fhandle, |
| 2003 | .fattr = &fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2004 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | }; |
| 2006 | struct rpc_message msg = { |
| 2007 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], |
| 2008 | .rpc_argp = &arg, |
| 2009 | .rpc_resp = &res, |
| 2010 | }; |
| 2011 | int status; |
| 2012 | |
Chuck Lever | 94a6d75 | 2006-08-22 20:06:23 -0400 | [diff] [blame] | 2013 | if (len > NFS4_MAXPATHLEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | return -ENAMETOOLONG; |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2015 | |
Chuck Lever | 94a6d75 | 2006-08-22 20:06:23 -0400 | [diff] [blame] | 2016 | arg.u.symlink.pages = &page; |
| 2017 | arg.u.symlink.len = len; |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2018 | nfs_fattr_init(&fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2019 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | |
| 2021 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2022 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | update_changeattr(dir, &res.dir_cinfo); |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2024 | nfs_post_op_update_inode(dir, res.dir_fattr); |
| 2025 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 2026 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | return status; |
| 2028 | } |
| 2029 | |
Chuck Lever | 4f390c1 | 2006-08-22 20:06:22 -0400 | [diff] [blame] | 2030 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
Chuck Lever | 94a6d75 | 2006-08-22 20:06:23 -0400 | [diff] [blame] | 2031 | struct page *page, unsigned int len, struct iattr *sattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | { |
| 2033 | struct nfs4_exception exception = { }; |
| 2034 | int err; |
| 2035 | do { |
| 2036 | err = nfs4_handle_exception(NFS_SERVER(dir), |
Chuck Lever | 94a6d75 | 2006-08-22 20:06:23 -0400 | [diff] [blame] | 2037 | _nfs4_proc_symlink(dir, dentry, page, |
| 2038 | len, sattr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | &exception); |
| 2040 | } while (exception.retry); |
| 2041 | return err; |
| 2042 | } |
| 2043 | |
| 2044 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2045 | struct iattr *sattr) |
| 2046 | { |
| 2047 | struct nfs_server *server = NFS_SERVER(dir); |
| 2048 | struct nfs_fh fhandle; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2049 | struct nfs_fattr fattr, dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | struct nfs4_create_arg arg = { |
| 2051 | .dir_fh = NFS_FH(dir), |
| 2052 | .server = server, |
| 2053 | .name = &dentry->d_name, |
| 2054 | .attrs = sattr, |
| 2055 | .ftype = NF4DIR, |
| 2056 | .bitmask = server->attr_bitmask, |
| 2057 | }; |
| 2058 | struct nfs4_create_res res = { |
| 2059 | .server = server, |
| 2060 | .fh = &fhandle, |
| 2061 | .fattr = &fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2062 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | }; |
| 2064 | struct rpc_message msg = { |
| 2065 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| 2066 | .rpc_argp = &arg, |
| 2067 | .rpc_resp = &res, |
| 2068 | }; |
| 2069 | int status; |
| 2070 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2071 | nfs_fattr_init(&fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2072 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | |
| 2074 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 2075 | if (!status) { |
| 2076 | update_changeattr(dir, &res.dir_cinfo); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2077 | nfs_post_op_update_inode(dir, res.dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
| 2079 | } |
| 2080 | return status; |
| 2081 | } |
| 2082 | |
| 2083 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
| 2084 | struct iattr *sattr) |
| 2085 | { |
| 2086 | struct nfs4_exception exception = { }; |
| 2087 | int err; |
| 2088 | do { |
| 2089 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2090 | _nfs4_proc_mkdir(dir, dentry, sattr), |
| 2091 | &exception); |
| 2092 | } while (exception.retry); |
| 2093 | return err; |
| 2094 | } |
| 2095 | |
| 2096 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 2097 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 2098 | { |
| 2099 | struct inode *dir = dentry->d_inode; |
| 2100 | struct nfs4_readdir_arg args = { |
| 2101 | .fh = NFS_FH(dir), |
| 2102 | .pages = &page, |
| 2103 | .pgbase = 0, |
| 2104 | .count = count, |
| 2105 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
| 2106 | }; |
| 2107 | struct nfs4_readdir_res res; |
| 2108 | struct rpc_message msg = { |
| 2109 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
| 2110 | .rpc_argp = &args, |
| 2111 | .rpc_resp = &res, |
| 2112 | .rpc_cred = cred, |
| 2113 | }; |
| 2114 | int status; |
| 2115 | |
Trond Myklebust | eadf459 | 2005-06-22 17:16:39 +0000 | [diff] [blame] | 2116 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
| 2117 | dentry->d_parent->d_name.name, |
| 2118 | dentry->d_name.name, |
| 2119 | (unsigned long long)cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
| 2121 | res.pgbase = args.pgbase; |
| 2122 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 2123 | if (status == 0) |
| 2124 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); |
Trond Myklebust | eadf459 | 2005-06-22 17:16:39 +0000 | [diff] [blame] | 2125 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | return status; |
| 2127 | } |
| 2128 | |
| 2129 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, |
| 2130 | u64 cookie, struct page *page, unsigned int count, int plus) |
| 2131 | { |
| 2132 | struct nfs4_exception exception = { }; |
| 2133 | int err; |
| 2134 | do { |
| 2135 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), |
| 2136 | _nfs4_proc_readdir(dentry, cred, cookie, |
| 2137 | page, count, plus), |
| 2138 | &exception); |
| 2139 | } while (exception.retry); |
| 2140 | return err; |
| 2141 | } |
| 2142 | |
| 2143 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 2144 | struct iattr *sattr, dev_t rdev) |
| 2145 | { |
| 2146 | struct nfs_server *server = NFS_SERVER(dir); |
| 2147 | struct nfs_fh fh; |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2148 | struct nfs_fattr fattr, dir_fattr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | struct nfs4_create_arg arg = { |
| 2150 | .dir_fh = NFS_FH(dir), |
| 2151 | .server = server, |
| 2152 | .name = &dentry->d_name, |
| 2153 | .attrs = sattr, |
| 2154 | .bitmask = server->attr_bitmask, |
| 2155 | }; |
| 2156 | struct nfs4_create_res res = { |
| 2157 | .server = server, |
| 2158 | .fh = &fh, |
| 2159 | .fattr = &fattr, |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2160 | .dir_fattr = &dir_fattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | }; |
| 2162 | struct rpc_message msg = { |
| 2163 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], |
| 2164 | .rpc_argp = &arg, |
| 2165 | .rpc_resp = &res, |
| 2166 | }; |
| 2167 | int status; |
| 2168 | int mode = sattr->ia_mode; |
| 2169 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2170 | nfs_fattr_init(&fattr); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2171 | nfs_fattr_init(&dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | |
| 2173 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); |
| 2174 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); |
| 2175 | if (S_ISFIFO(mode)) |
| 2176 | arg.ftype = NF4FIFO; |
| 2177 | else if (S_ISBLK(mode)) { |
| 2178 | arg.ftype = NF4BLK; |
| 2179 | arg.u.device.specdata1 = MAJOR(rdev); |
| 2180 | arg.u.device.specdata2 = MINOR(rdev); |
| 2181 | } |
| 2182 | else if (S_ISCHR(mode)) { |
| 2183 | arg.ftype = NF4CHR; |
| 2184 | arg.u.device.specdata1 = MAJOR(rdev); |
| 2185 | arg.u.device.specdata2 = MINOR(rdev); |
| 2186 | } |
| 2187 | else |
| 2188 | arg.ftype = NF4SOCK; |
| 2189 | |
| 2190 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
| 2191 | if (status == 0) { |
| 2192 | update_changeattr(dir, &res.dir_cinfo); |
Trond Myklebust | 56ae19f | 2005-10-27 22:12:40 -0400 | [diff] [blame] | 2193 | nfs_post_op_update_inode(dir, res.dir_fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | status = nfs_instantiate(dentry, &fh, &fattr); |
| 2195 | } |
| 2196 | return status; |
| 2197 | } |
| 2198 | |
| 2199 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
| 2200 | struct iattr *sattr, dev_t rdev) |
| 2201 | { |
| 2202 | struct nfs4_exception exception = { }; |
| 2203 | int err; |
| 2204 | do { |
| 2205 | err = nfs4_handle_exception(NFS_SERVER(dir), |
| 2206 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), |
| 2207 | &exception); |
| 2208 | } while (exception.retry); |
| 2209 | return err; |
| 2210 | } |
| 2211 | |
| 2212 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2213 | struct nfs_fsstat *fsstat) |
| 2214 | { |
| 2215 | struct nfs4_statfs_arg args = { |
| 2216 | .fh = fhandle, |
| 2217 | .bitmask = server->attr_bitmask, |
| 2218 | }; |
| 2219 | struct rpc_message msg = { |
| 2220 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
| 2221 | .rpc_argp = &args, |
| 2222 | .rpc_resp = fsstat, |
| 2223 | }; |
| 2224 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2225 | nfs_fattr_init(fsstat->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | return rpc_call_sync(server->client, &msg, 0); |
| 2227 | } |
| 2228 | |
| 2229 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
| 2230 | { |
| 2231 | struct nfs4_exception exception = { }; |
| 2232 | int err; |
| 2233 | do { |
| 2234 | err = nfs4_handle_exception(server, |
| 2235 | _nfs4_proc_statfs(server, fhandle, fsstat), |
| 2236 | &exception); |
| 2237 | } while (exception.retry); |
| 2238 | return err; |
| 2239 | } |
| 2240 | |
| 2241 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2242 | struct nfs_fsinfo *fsinfo) |
| 2243 | { |
| 2244 | struct nfs4_fsinfo_arg args = { |
| 2245 | .fh = fhandle, |
| 2246 | .bitmask = server->attr_bitmask, |
| 2247 | }; |
| 2248 | struct rpc_message msg = { |
| 2249 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
| 2250 | .rpc_argp = &args, |
| 2251 | .rpc_resp = fsinfo, |
| 2252 | }; |
| 2253 | |
| 2254 | return rpc_call_sync(server->client, &msg, 0); |
| 2255 | } |
| 2256 | |
| 2257 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2258 | { |
| 2259 | struct nfs4_exception exception = { }; |
| 2260 | int err; |
| 2261 | |
| 2262 | do { |
| 2263 | err = nfs4_handle_exception(server, |
| 2264 | _nfs4_do_fsinfo(server, fhandle, fsinfo), |
| 2265 | &exception); |
| 2266 | } while (exception.retry); |
| 2267 | return err; |
| 2268 | } |
| 2269 | |
| 2270 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
| 2271 | { |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2272 | nfs_fattr_init(fsinfo->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
| 2274 | } |
| 2275 | |
| 2276 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2277 | struct nfs_pathconf *pathconf) |
| 2278 | { |
| 2279 | struct nfs4_pathconf_arg args = { |
| 2280 | .fh = fhandle, |
| 2281 | .bitmask = server->attr_bitmask, |
| 2282 | }; |
| 2283 | struct rpc_message msg = { |
| 2284 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
| 2285 | .rpc_argp = &args, |
| 2286 | .rpc_resp = pathconf, |
| 2287 | }; |
| 2288 | |
| 2289 | /* None of the pathconf attributes are mandatory to implement */ |
| 2290 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
| 2291 | memset(pathconf, 0, sizeof(*pathconf)); |
| 2292 | return 0; |
| 2293 | } |
| 2294 | |
Trond Myklebust | 0e574af | 2005-10-27 22:12:38 -0400 | [diff] [blame] | 2295 | nfs_fattr_init(pathconf->fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | return rpc_call_sync(server->client, &msg, 0); |
| 2297 | } |
| 2298 | |
| 2299 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
| 2300 | struct nfs_pathconf *pathconf) |
| 2301 | { |
| 2302 | struct nfs4_exception exception = { }; |
| 2303 | int err; |
| 2304 | |
| 2305 | do { |
| 2306 | err = nfs4_handle_exception(server, |
| 2307 | _nfs4_proc_pathconf(server, fhandle, pathconf), |
| 2308 | &exception); |
| 2309 | } while (exception.retry); |
| 2310 | return err; |
| 2311 | } |
| 2312 | |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2313 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | { |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2315 | struct nfs_server *server = NFS_SERVER(data->inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2317 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | rpc_restart_call(task); |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2319 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | } |
| 2321 | if (task->tk_status > 0) |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2322 | renew_lease(server, data->timestamp); |
| 2323 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2324 | } |
| 2325 | |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2326 | static void nfs4_proc_read_setup(struct nfs_read_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | struct rpc_message msg = { |
| 2329 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], |
| 2330 | .rpc_argp = &data->args, |
| 2331 | .rpc_resp = &data->res, |
| 2332 | .rpc_cred = data->cred, |
| 2333 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | |
| 2335 | data->timestamp = jiffies; |
| 2336 | |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2337 | rpc_call_setup(&data->task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | } |
| 2339 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2340 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | struct inode *inode = data->inode; |
| 2343 | |
| 2344 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| 2345 | rpc_restart_call(task); |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2346 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | } |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2348 | if (task->tk_status >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | renew_lease(NFS_SERVER(inode), data->timestamp); |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2350 | nfs_post_op_update_inode(inode, data->res.fattr); |
| 2351 | } |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2352 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | } |
| 2354 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2355 | static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | struct rpc_message msg = { |
| 2358 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], |
| 2359 | .rpc_argp = &data->args, |
| 2360 | .rpc_resp = &data->res, |
| 2361 | .rpc_cred = data->cred, |
| 2362 | }; |
| 2363 | struct inode *inode = data->inode; |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2364 | struct nfs_server *server = NFS_SERVER(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | int stable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | |
| 2367 | if (how & FLUSH_STABLE) { |
| 2368 | if (!NFS_I(inode)->ncommit) |
| 2369 | stable = NFS_FILE_SYNC; |
| 2370 | else |
| 2371 | stable = NFS_DATA_SYNC; |
| 2372 | } else |
| 2373 | stable = NFS_UNSTABLE; |
| 2374 | data->args.stable = stable; |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2375 | data->args.bitmask = server->attr_bitmask; |
| 2376 | data->res.server = server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | |
| 2378 | data->timestamp = jiffies; |
| 2379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | /* Finalize the task. */ |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2381 | rpc_call_setup(&data->task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | } |
| 2383 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2384 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | struct inode *inode = data->inode; |
| 2387 | |
| 2388 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { |
| 2389 | rpc_restart_call(task); |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2390 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | } |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2392 | if (task->tk_status >= 0) |
| 2393 | nfs_post_op_update_inode(inode, data->res.fattr); |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2394 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | } |
| 2396 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2397 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2398 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | struct rpc_message msg = { |
| 2400 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
| 2401 | .rpc_argp = &data->args, |
| 2402 | .rpc_resp = &data->res, |
| 2403 | .rpc_cred = data->cred, |
| 2404 | }; |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2405 | struct nfs_server *server = NFS_SERVER(data->inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | |
Trond Myklebust | 4f9838c | 2005-10-27 22:12:44 -0400 | [diff] [blame] | 2407 | data->args.bitmask = server->attr_bitmask; |
| 2408 | data->res.server = server; |
| 2409 | |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 2410 | rpc_call_setup(&data->task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | } |
| 2412 | |
| 2413 | /* |
| 2414 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
| 2415 | * standalone procedure for queueing an asynchronous RENEW. |
| 2416 | */ |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 2417 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | { |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2419 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 2420 | unsigned long timestamp = (unsigned long)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | |
| 2422 | if (task->tk_status < 0) { |
| 2423 | switch (task->tk_status) { |
| 2424 | case -NFS4ERR_STALE_CLIENTID: |
| 2425 | case -NFS4ERR_EXPIRED: |
| 2426 | case -NFS4ERR_CB_PATH_DOWN: |
| 2427 | nfs4_schedule_state_recovery(clp); |
| 2428 | } |
| 2429 | return; |
| 2430 | } |
| 2431 | spin_lock(&clp->cl_lock); |
| 2432 | if (time_before(clp->cl_last_renewal,timestamp)) |
| 2433 | clp->cl_last_renewal = timestamp; |
| 2434 | spin_unlock(&clp->cl_lock); |
| 2435 | } |
| 2436 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 2437 | static const struct rpc_call_ops nfs4_renew_ops = { |
| 2438 | .rpc_call_done = nfs4_renew_done, |
| 2439 | }; |
| 2440 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2441 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | { |
| 2443 | struct rpc_message msg = { |
| 2444 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 2445 | .rpc_argp = clp, |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 2446 | .rpc_cred = cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | }; |
| 2448 | |
| 2449 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 2450 | &nfs4_renew_ops, (void *)jiffies); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | } |
| 2452 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2453 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | { |
| 2455 | struct rpc_message msg = { |
| 2456 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
| 2457 | .rpc_argp = clp, |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 2458 | .rpc_cred = cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2459 | }; |
| 2460 | unsigned long now = jiffies; |
| 2461 | int status; |
| 2462 | |
| 2463 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2464 | if (status < 0) |
| 2465 | return status; |
| 2466 | spin_lock(&clp->cl_lock); |
| 2467 | if (time_before(clp->cl_last_renewal,now)) |
| 2468 | clp->cl_last_renewal = now; |
| 2469 | spin_unlock(&clp->cl_lock); |
| 2470 | return 0; |
| 2471 | } |
| 2472 | |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2473 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
| 2474 | { |
| 2475 | return (server->caps & NFS_CAP_ACLS) |
| 2476 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
| 2477 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); |
| 2478 | } |
| 2479 | |
| 2480 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that |
| 2481 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on |
| 2482 | * the stack. |
| 2483 | */ |
| 2484 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) |
| 2485 | |
| 2486 | static void buf_to_pages(const void *buf, size_t buflen, |
| 2487 | struct page **pages, unsigned int *pgbase) |
| 2488 | { |
| 2489 | const void *p = buf; |
| 2490 | |
| 2491 | *pgbase = offset_in_page(buf); |
| 2492 | p -= *pgbase; |
| 2493 | while (p < buf + buflen) { |
| 2494 | *(pages++) = virt_to_page(p); |
| 2495 | p += PAGE_CACHE_SIZE; |
| 2496 | } |
| 2497 | } |
| 2498 | |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2499 | struct nfs4_cached_acl { |
| 2500 | int cached; |
| 2501 | size_t len; |
Andrew Morton | 3e9d415 | 2005-06-22 17:16:28 +0000 | [diff] [blame] | 2502 | char data[0]; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2503 | }; |
| 2504 | |
| 2505 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2506 | { |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2507 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2508 | |
| 2509 | spin_lock(&inode->i_lock); |
| 2510 | kfree(nfsi->nfs4_acl); |
| 2511 | nfsi->nfs4_acl = acl; |
| 2512 | spin_unlock(&inode->i_lock); |
| 2513 | } |
| 2514 | |
| 2515 | static void nfs4_zap_acl_attr(struct inode *inode) |
| 2516 | { |
| 2517 | nfs4_set_cached_acl(inode, NULL); |
| 2518 | } |
| 2519 | |
| 2520 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
| 2521 | { |
| 2522 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2523 | struct nfs4_cached_acl *acl; |
| 2524 | int ret = -ENOENT; |
| 2525 | |
| 2526 | spin_lock(&inode->i_lock); |
| 2527 | acl = nfsi->nfs4_acl; |
| 2528 | if (acl == NULL) |
| 2529 | goto out; |
| 2530 | if (buf == NULL) /* user is just asking for length */ |
| 2531 | goto out_len; |
| 2532 | if (acl->cached == 0) |
| 2533 | goto out; |
| 2534 | ret = -ERANGE; /* see getxattr(2) man page */ |
| 2535 | if (acl->len > buflen) |
| 2536 | goto out; |
| 2537 | memcpy(buf, acl->data, acl->len); |
| 2538 | out_len: |
| 2539 | ret = acl->len; |
| 2540 | out: |
| 2541 | spin_unlock(&inode->i_lock); |
| 2542 | return ret; |
| 2543 | } |
| 2544 | |
| 2545 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) |
| 2546 | { |
| 2547 | struct nfs4_cached_acl *acl; |
| 2548 | |
| 2549 | if (buf && acl_len <= PAGE_SIZE) { |
| 2550 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); |
| 2551 | if (acl == NULL) |
| 2552 | goto out; |
| 2553 | acl->cached = 1; |
| 2554 | memcpy(acl->data, buf, acl_len); |
| 2555 | } else { |
| 2556 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
| 2557 | if (acl == NULL) |
| 2558 | goto out; |
| 2559 | acl->cached = 0; |
| 2560 | } |
| 2561 | acl->len = acl_len; |
| 2562 | out: |
| 2563 | nfs4_set_cached_acl(inode, acl); |
| 2564 | } |
| 2565 | |
Trond Myklebust | 16b4289c | 2006-08-24 12:27:15 -0400 | [diff] [blame] | 2566 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2567 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2568 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 2569 | struct nfs_getaclargs args = { |
| 2570 | .fh = NFS_FH(inode), |
| 2571 | .acl_pages = pages, |
| 2572 | .acl_len = buflen, |
| 2573 | }; |
| 2574 | size_t resp_len = buflen; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2575 | void *resp_buf; |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2576 | struct rpc_message msg = { |
| 2577 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
| 2578 | .rpc_argp = &args, |
| 2579 | .rpc_resp = &resp_len, |
| 2580 | }; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2581 | struct page *localpage = NULL; |
| 2582 | int ret; |
| 2583 | |
| 2584 | if (buflen < PAGE_SIZE) { |
| 2585 | /* As long as we're doing a round trip to the server anyway, |
| 2586 | * let's be prepared for a page of acl data. */ |
| 2587 | localpage = alloc_page(GFP_KERNEL); |
| 2588 | resp_buf = page_address(localpage); |
| 2589 | if (localpage == NULL) |
| 2590 | return -ENOMEM; |
| 2591 | args.acl_pages[0] = localpage; |
| 2592 | args.acl_pgbase = 0; |
J. Bruce Fields | 1d95db8 | 2005-10-13 16:54:32 -0400 | [diff] [blame] | 2593 | resp_len = args.acl_len = PAGE_SIZE; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2594 | } else { |
| 2595 | resp_buf = buf; |
| 2596 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); |
| 2597 | } |
| 2598 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
| 2599 | if (ret) |
| 2600 | goto out_free; |
| 2601 | if (resp_len > args.acl_len) |
| 2602 | nfs4_write_cached_acl(inode, NULL, resp_len); |
| 2603 | else |
| 2604 | nfs4_write_cached_acl(inode, resp_buf, resp_len); |
| 2605 | if (buf) { |
| 2606 | ret = -ERANGE; |
| 2607 | if (resp_len > buflen) |
| 2608 | goto out_free; |
| 2609 | if (localpage) |
| 2610 | memcpy(buf, resp_buf, resp_len); |
| 2611 | } |
| 2612 | ret = resp_len; |
| 2613 | out_free: |
| 2614 | if (localpage) |
| 2615 | __free_page(localpage); |
| 2616 | return ret; |
| 2617 | } |
| 2618 | |
Trond Myklebust | 16b4289c | 2006-08-24 12:27:15 -0400 | [diff] [blame] | 2619 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
| 2620 | { |
| 2621 | struct nfs4_exception exception = { }; |
| 2622 | ssize_t ret; |
| 2623 | do { |
| 2624 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
| 2625 | if (ret >= 0) |
| 2626 | break; |
| 2627 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
| 2628 | } while (exception.retry); |
| 2629 | return ret; |
| 2630 | } |
| 2631 | |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2632 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
| 2633 | { |
| 2634 | struct nfs_server *server = NFS_SERVER(inode); |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2635 | int ret; |
| 2636 | |
| 2637 | if (!nfs4_server_supports_acls(server)) |
| 2638 | return -EOPNOTSUPP; |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2639 | ret = nfs_revalidate_inode(server, inode); |
| 2640 | if (ret < 0) |
| 2641 | return ret; |
| 2642 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
| 2643 | if (ret != -ENOENT) |
| 2644 | return ret; |
| 2645 | return nfs4_get_acl_uncached(inode, buf, buflen); |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 2646 | } |
| 2647 | |
Trond Myklebust | 16b4289c | 2006-08-24 12:27:15 -0400 | [diff] [blame] | 2648 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2649 | { |
| 2650 | struct nfs_server *server = NFS_SERVER(inode); |
| 2651 | struct page *pages[NFS4ACL_MAXPAGES]; |
| 2652 | struct nfs_setaclargs arg = { |
| 2653 | .fh = NFS_FH(inode), |
| 2654 | .acl_pages = pages, |
| 2655 | .acl_len = buflen, |
| 2656 | }; |
| 2657 | struct rpc_message msg = { |
| 2658 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
| 2659 | .rpc_argp = &arg, |
| 2660 | .rpc_resp = NULL, |
| 2661 | }; |
| 2662 | int ret; |
| 2663 | |
| 2664 | if (!nfs4_server_supports_acls(server)) |
| 2665 | return -EOPNOTSUPP; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 2666 | nfs_inode_return_delegation(inode); |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2667 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
David Howells | 1f16341 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 2668 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
J. Bruce Fields | 08efa20 | 2007-05-01 10:56:25 -0400 | [diff] [blame] | 2669 | nfs_zap_caches(inode); |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 2670 | return ret; |
| 2671 | } |
| 2672 | |
Trond Myklebust | 16b4289c | 2006-08-24 12:27:15 -0400 | [diff] [blame] | 2673 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
| 2674 | { |
| 2675 | struct nfs4_exception exception = { }; |
| 2676 | int err; |
| 2677 | do { |
| 2678 | err = nfs4_handle_exception(NFS_SERVER(inode), |
| 2679 | __nfs4_proc_set_acl(inode, buf, buflen), |
| 2680 | &exception); |
| 2681 | } while (exception.retry); |
| 2682 | return err; |
| 2683 | } |
| 2684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | static int |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 2686 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 2688 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | |
| 2690 | if (!clp || task->tk_status >= 0) |
| 2691 | return 0; |
| 2692 | switch(task->tk_status) { |
| 2693 | case -NFS4ERR_STALE_CLIENTID: |
| 2694 | case -NFS4ERR_STALE_STATEID: |
| 2695 | case -NFS4ERR_EXPIRED: |
| 2696 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); |
| 2697 | nfs4_schedule_state_recovery(clp); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 2698 | if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | rpc_wake_up_task(task); |
| 2700 | task->tk_status = 0; |
| 2701 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | case -NFS4ERR_DELAY: |
Chuck Lever | 006ea73 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 2703 | nfs_inc_server_stats((struct nfs_server *) server, |
| 2704 | NFSIOS_DELAY); |
| 2705 | case -NFS4ERR_GRACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
| 2707 | task->tk_status = 0; |
| 2708 | return -EAGAIN; |
| 2709 | case -NFS4ERR_OLD_STATEID: |
| 2710 | task->tk_status = 0; |
| 2711 | return -EAGAIN; |
| 2712 | } |
| 2713 | task->tk_status = nfs4_map_errors(task->tk_status); |
| 2714 | return 0; |
| 2715 | } |
| 2716 | |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 2717 | static int nfs4_wait_bit_interruptible(void *word) |
| 2718 | { |
| 2719 | if (signal_pending(current)) |
| 2720 | return -ERESTARTSYS; |
| 2721 | schedule(); |
| 2722 | return 0; |
| 2723 | } |
| 2724 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2725 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2727 | sigset_t oldset; |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 2728 | int res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2729 | |
| 2730 | might_sleep(); |
| 2731 | |
Trond Myklebust | e148582 | 2006-12-13 16:43:13 -0500 | [diff] [blame] | 2732 | rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_); |
| 2733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | rpc_clnt_sigmask(clnt, &oldset); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 2735 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, |
| 2736 | nfs4_wait_bit_interruptible, |
| 2737 | TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | rpc_clnt_sigunmask(clnt, &oldset); |
Trond Myklebust | e148582 | 2006-12-13 16:43:13 -0500 | [diff] [blame] | 2739 | |
| 2740 | rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | return res; |
| 2742 | } |
| 2743 | |
| 2744 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) |
| 2745 | { |
| 2746 | sigset_t oldset; |
| 2747 | int res = 0; |
| 2748 | |
| 2749 | might_sleep(); |
| 2750 | |
| 2751 | if (*timeout <= 0) |
| 2752 | *timeout = NFS4_POLL_RETRY_MIN; |
| 2753 | if (*timeout > NFS4_POLL_RETRY_MAX) |
| 2754 | *timeout = NFS4_POLL_RETRY_MAX; |
| 2755 | rpc_clnt_sigmask(clnt, &oldset); |
| 2756 | if (clnt->cl_intr) { |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2757 | schedule_timeout_interruptible(*timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | if (signalled()) |
| 2759 | res = -ERESTARTSYS; |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2760 | } else |
| 2761 | schedule_timeout_uninterruptible(*timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | rpc_clnt_sigunmask(clnt, &oldset); |
| 2763 | *timeout <<= 1; |
| 2764 | return res; |
| 2765 | } |
| 2766 | |
| 2767 | /* This is the error handling routine for processes that are allowed |
| 2768 | * to sleep. |
| 2769 | */ |
Trond Myklebust | 10afec9 | 2007-05-14 17:16:04 -0400 | [diff] [blame] | 2770 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 2772 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | int ret = errorcode; |
| 2774 | |
| 2775 | exception->retry = 0; |
| 2776 | switch(errorcode) { |
| 2777 | case 0: |
| 2778 | return 0; |
| 2779 | case -NFS4ERR_STALE_CLIENTID: |
| 2780 | case -NFS4ERR_STALE_STATEID: |
| 2781 | case -NFS4ERR_EXPIRED: |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 2782 | nfs4_schedule_state_recovery(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2783 | ret = nfs4_wait_clnt_recover(server->client, clp); |
| 2784 | if (ret == 0) |
| 2785 | exception->retry = 1; |
| 2786 | break; |
Trond Myklebust | c514983 | 2006-09-15 08:25:04 -0400 | [diff] [blame] | 2787 | case -NFS4ERR_FILE_OPEN: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | case -NFS4ERR_GRACE: |
| 2789 | case -NFS4ERR_DELAY: |
| 2790 | ret = nfs4_delay(server->client, &exception->timeout); |
Trond Myklebust | 2c56617 | 2005-11-04 15:33:50 -0500 | [diff] [blame] | 2791 | if (ret != 0) |
| 2792 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | case -NFS4ERR_OLD_STATEID: |
Trond Myklebust | 2c56617 | 2005-11-04 15:33:50 -0500 | [diff] [blame] | 2794 | exception->retry = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | } |
| 2796 | /* We failed to handle the error */ |
| 2797 | return nfs4_map_errors(ret); |
| 2798 | } |
| 2799 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2800 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | { |
| 2802 | nfs4_verifier sc_verifier; |
| 2803 | struct nfs4_setclientid setclientid = { |
| 2804 | .sc_verifier = &sc_verifier, |
| 2805 | .sc_prog = program, |
| 2806 | }; |
| 2807 | struct rpc_message msg = { |
| 2808 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
| 2809 | .rpc_argp = &setclientid, |
| 2810 | .rpc_resp = clp, |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 2811 | .rpc_cred = cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | }; |
Al Viro | bc4785c | 2006-10-19 23:28:51 -0700 | [diff] [blame] | 2813 | __be32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | int loop = 0; |
| 2815 | int status; |
| 2816 | |
Al Viro | bc4785c | 2006-10-19 23:28:51 -0700 | [diff] [blame] | 2817 | p = (__be32*)sc_verifier.data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
| 2819 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); |
| 2820 | |
| 2821 | for(;;) { |
| 2822 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, |
| 2823 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 2824 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr), |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 2825 | cred->cr_ops->cr_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | clp->cl_id_uniquifier); |
| 2827 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, |
| 2828 | sizeof(setclientid.sc_netid), "tcp"); |
| 2829 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
| 2830 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", |
| 2831 | clp->cl_ipaddr, port >> 8, port & 255); |
| 2832 | |
| 2833 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2834 | if (status != -NFS4ERR_CLID_INUSE) |
| 2835 | break; |
| 2836 | if (signalled()) |
| 2837 | break; |
| 2838 | if (loop++ & 1) |
| 2839 | ssleep(clp->cl_lease_time + 1); |
| 2840 | else |
| 2841 | if (++clp->cl_id_uniquifier == 0) |
| 2842 | break; |
| 2843 | } |
| 2844 | return status; |
| 2845 | } |
| 2846 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2847 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | { |
| 2849 | struct nfs_fsinfo fsinfo; |
| 2850 | struct rpc_message msg = { |
| 2851 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
| 2852 | .rpc_argp = clp, |
| 2853 | .rpc_resp = &fsinfo, |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 2854 | .rpc_cred = cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | }; |
| 2856 | unsigned long now; |
| 2857 | int status; |
| 2858 | |
| 2859 | now = jiffies; |
| 2860 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); |
| 2861 | if (status == 0) { |
| 2862 | spin_lock(&clp->cl_lock); |
| 2863 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 2864 | clp->cl_last_renewal = now; |
Trond Myklebust | 58d9714 | 2006-01-03 09:55:24 +0100 | [diff] [blame] | 2865 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | spin_unlock(&clp->cl_lock); |
| 2867 | } |
| 2868 | return status; |
| 2869 | } |
| 2870 | |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 2871 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
Trond Myklebust | 51581f3 | 2006-03-20 13:44:47 -0500 | [diff] [blame] | 2872 | { |
| 2873 | long timeout; |
| 2874 | int err; |
| 2875 | do { |
| 2876 | err = _nfs4_proc_setclientid_confirm(clp, cred); |
| 2877 | switch (err) { |
| 2878 | case 0: |
| 2879 | return err; |
| 2880 | case -NFS4ERR_RESOURCE: |
| 2881 | /* The IBM lawyers misread another document! */ |
| 2882 | case -NFS4ERR_DELAY: |
| 2883 | err = nfs4_delay(clp->cl_rpcclient, &timeout); |
| 2884 | } |
| 2885 | } while (err == 0); |
| 2886 | return err; |
| 2887 | } |
| 2888 | |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2889 | struct nfs4_delegreturndata { |
| 2890 | struct nfs4_delegreturnargs args; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2891 | struct nfs4_delegreturnres res; |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2892 | struct nfs_fh fh; |
| 2893 | nfs4_stateid stateid; |
| 2894 | struct rpc_cred *cred; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 2895 | unsigned long timestamp; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2896 | struct nfs_fattr fattr; |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2897 | int rpc_status; |
| 2898 | }; |
| 2899 | |
| 2900 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | { |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2902 | struct nfs4_delegreturndata *data = calldata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2903 | struct rpc_message msg = { |
| 2904 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2905 | .rpc_argp = &data->args, |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2906 | .rpc_resp = &data->res, |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2907 | .rpc_cred = data->cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | }; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2909 | nfs_fattr_init(data->res.fattr); |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2910 | rpc_call_setup(task, &msg, 0); |
| 2911 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2913 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
| 2914 | { |
| 2915 | struct nfs4_delegreturndata *data = calldata; |
| 2916 | data->rpc_status = task->tk_status; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 2917 | if (data->rpc_status == 0) |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2918 | renew_lease(data->res.server, data->timestamp); |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2919 | } |
| 2920 | |
| 2921 | static void nfs4_delegreturn_release(void *calldata) |
| 2922 | { |
| 2923 | struct nfs4_delegreturndata *data = calldata; |
| 2924 | |
| 2925 | put_rpccred(data->cred); |
| 2926 | kfree(calldata); |
| 2927 | } |
| 2928 | |
Jesper Juhl | c8d149f | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 2929 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2930 | .rpc_call_prepare = nfs4_delegreturn_prepare, |
| 2931 | .rpc_call_done = nfs4_delegreturn_done, |
| 2932 | .rpc_release = nfs4_delegreturn_release, |
| 2933 | }; |
| 2934 | |
| 2935 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| 2936 | { |
| 2937 | struct nfs4_delegreturndata *data; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2938 | struct nfs_server *server = NFS_SERVER(inode); |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2939 | struct rpc_task *task; |
| 2940 | int status; |
| 2941 | |
| 2942 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
| 2943 | if (data == NULL) |
| 2944 | return -ENOMEM; |
| 2945 | data->args.fhandle = &data->fh; |
| 2946 | data->args.stateid = &data->stateid; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2947 | data->args.bitmask = server->attr_bitmask; |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2948 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
| 2949 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2950 | data->res.fattr = &data->fattr; |
| 2951 | data->res.server = server; |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2952 | data->cred = get_rpccred(cred); |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 2953 | data->timestamp = jiffies; |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2954 | data->rpc_status = 0; |
| 2955 | |
| 2956 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 2957 | if (IS_ERR(task)) |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2958 | return PTR_ERR(task); |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2959 | status = nfs4_wait_for_completion_rpc_task(task); |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2960 | if (status == 0) { |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2961 | status = data->rpc_status; |
Trond Myklebust | fa178f2 | 2006-01-03 09:55:38 +0100 | [diff] [blame] | 2962 | if (status == 0) |
| 2963 | nfs_post_op_update_inode(inode, &data->fattr); |
| 2964 | } |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 2965 | rpc_put_task(task); |
Trond Myklebust | fe65040 | 2006-01-03 09:55:18 +0100 | [diff] [blame] | 2966 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2967 | } |
| 2968 | |
| 2969 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) |
| 2970 | { |
| 2971 | struct nfs_server *server = NFS_SERVER(inode); |
| 2972 | struct nfs4_exception exception = { }; |
| 2973 | int err; |
| 2974 | do { |
| 2975 | err = _nfs4_proc_delegreturn(inode, cred, stateid); |
| 2976 | switch (err) { |
| 2977 | case -NFS4ERR_STALE_STATEID: |
| 2978 | case -NFS4ERR_EXPIRED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | case 0: |
| 2980 | return 0; |
| 2981 | } |
| 2982 | err = nfs4_handle_exception(server, err, &exception); |
| 2983 | } while (exception.retry); |
| 2984 | return err; |
| 2985 | } |
| 2986 | |
| 2987 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
| 2988 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
| 2989 | |
| 2990 | /* |
| 2991 | * sleep, with exponential backoff, and retry the LOCK operation. |
| 2992 | */ |
| 2993 | static unsigned long |
| 2994 | nfs4_set_lock_task_retry(unsigned long timeout) |
| 2995 | { |
Nishanth Aravamudan | 041e0e3 | 2005-09-10 00:27:23 -0700 | [diff] [blame] | 2996 | schedule_timeout_interruptible(timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2997 | timeout <<= 1; |
| 2998 | if (timeout > NFS4_LOCK_MAXTIMEOUT) |
| 2999 | return NFS4_LOCK_MAXTIMEOUT; |
| 3000 | return timeout; |
| 3001 | } |
| 3002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3004 | { |
| 3005 | struct inode *inode = state->inode; |
| 3006 | struct nfs_server *server = NFS_SERVER(inode); |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 3007 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3008 | struct nfs_lockt_args arg = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | .fh = NFS_FH(inode), |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3010 | .fl = request, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | }; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3012 | struct nfs_lockt_res res = { |
| 3013 | .denied = request, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | }; |
| 3015 | struct rpc_message msg = { |
| 3016 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
| 3017 | .rpc_argp = &arg, |
| 3018 | .rpc_resp = &res, |
| 3019 | .rpc_cred = state->owner->so_cred, |
| 3020 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | struct nfs4_lock_state *lsp; |
| 3022 | int status; |
| 3023 | |
| 3024 | down_read(&clp->cl_sem); |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3025 | arg.lock_owner.clientid = clp->cl_clientid; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 3026 | status = nfs4_set_lock_state(state, request); |
| 3027 | if (status != 0) |
| 3028 | goto out; |
| 3029 | lsp = request->fl_u.nfs4_fl.owner; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3030 | arg.lock_owner.id = lsp->ls_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3031 | status = rpc_call_sync(server->client, &msg, 0); |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3032 | switch (status) { |
| 3033 | case 0: |
| 3034 | request->fl_type = F_UNLCK; |
| 3035 | break; |
| 3036 | case -NFS4ERR_DENIED: |
| 3037 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | } |
J. Bruce Fields | 70cc648 | 2007-02-22 18:48:53 -0500 | [diff] [blame] | 3039 | request->fl_ops->fl_release_private(request); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 3040 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3041 | up_read(&clp->cl_sem); |
| 3042 | return status; |
| 3043 | } |
| 3044 | |
| 3045 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3046 | { |
| 3047 | struct nfs4_exception exception = { }; |
| 3048 | int err; |
| 3049 | |
| 3050 | do { |
| 3051 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 3052 | _nfs4_proc_getlk(state, cmd, request), |
| 3053 | &exception); |
| 3054 | } while (exception.retry); |
| 3055 | return err; |
| 3056 | } |
| 3057 | |
| 3058 | static int do_vfs_lock(struct file *file, struct file_lock *fl) |
| 3059 | { |
| 3060 | int res = 0; |
| 3061 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { |
| 3062 | case FL_POSIX: |
| 3063 | res = posix_lock_file_wait(file, fl); |
| 3064 | break; |
| 3065 | case FL_FLOCK: |
| 3066 | res = flock_lock_file_wait(file, fl); |
| 3067 | break; |
| 3068 | default: |
| 3069 | BUG(); |
| 3070 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3071 | return res; |
| 3072 | } |
| 3073 | |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3074 | struct nfs4_unlockdata { |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3075 | struct nfs_locku_args arg; |
| 3076 | struct nfs_locku_res res; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3077 | struct nfs4_lock_state *lsp; |
| 3078 | struct nfs_open_context *ctx; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3079 | struct file_lock fl; |
| 3080 | const struct nfs_server *server; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 3081 | unsigned long timestamp; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3082 | }; |
| 3083 | |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3084 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
| 3085 | struct nfs_open_context *ctx, |
| 3086 | struct nfs4_lock_state *lsp, |
| 3087 | struct nfs_seqid *seqid) |
| 3088 | { |
| 3089 | struct nfs4_unlockdata *p; |
| 3090 | struct inode *inode = lsp->ls_state->inode; |
| 3091 | |
| 3092 | p = kmalloc(sizeof(*p), GFP_KERNEL); |
| 3093 | if (p == NULL) |
| 3094 | return NULL; |
| 3095 | p->arg.fh = NFS_FH(inode); |
| 3096 | p->arg.fl = &p->fl; |
| 3097 | p->arg.seqid = seqid; |
| 3098 | p->arg.stateid = &lsp->ls_stateid; |
| 3099 | p->lsp = lsp; |
| 3100 | atomic_inc(&lsp->ls_count); |
| 3101 | /* Ensure we don't close file until we're done freeing locks! */ |
| 3102 | p->ctx = get_nfs_open_context(ctx); |
| 3103 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 3104 | p->server = NFS_SERVER(inode); |
| 3105 | return p; |
| 3106 | } |
| 3107 | |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 3108 | static void nfs4_locku_release_calldata(void *data) |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3109 | { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3110 | struct nfs4_unlockdata *calldata = data; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3111 | nfs_free_seqid(calldata->arg.seqid); |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 3112 | nfs4_put_lock_state(calldata->lsp); |
| 3113 | put_nfs_open_context(calldata->ctx); |
| 3114 | kfree(calldata); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3115 | } |
| 3116 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3117 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3118 | { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3119 | struct nfs4_unlockdata *calldata = data; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3120 | |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 3121 | if (RPC_ASSASSINATED(task)) |
| 3122 | return; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3123 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3124 | switch (task->tk_status) { |
| 3125 | case 0: |
| 3126 | memcpy(calldata->lsp->ls_stateid.data, |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3127 | calldata->res.stateid.data, |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3128 | sizeof(calldata->lsp->ls_stateid.data)); |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 3129 | renew_lease(calldata->server, calldata->timestamp); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3130 | break; |
| 3131 | case -NFS4ERR_STALE_STATEID: |
| 3132 | case -NFS4ERR_EXPIRED: |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3133 | break; |
| 3134 | default: |
Trond Myklebust | a6a352e | 2006-12-13 16:43:06 -0500 | [diff] [blame] | 3135 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3136 | rpc_restart_call(task); |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3137 | } |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3138 | } |
| 3139 | |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 3140 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3141 | { |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 3142 | struct nfs4_unlockdata *calldata = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3143 | struct rpc_message msg = { |
| 3144 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3145 | .rpc_argp = &calldata->arg, |
| 3146 | .rpc_resp = &calldata->res, |
| 3147 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3148 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3150 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3151 | return; |
| 3152 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3153 | /* Note: exit _without_ running nfs4_locku_done */ |
| 3154 | task->tk_action = NULL; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3155 | return; |
| 3156 | } |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 3157 | calldata->timestamp = jiffies; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3158 | rpc_call_setup(task, &msg, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3159 | } |
| 3160 | |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3161 | static const struct rpc_call_ops nfs4_locku_ops = { |
Trond Myklebust | 4ce70ad | 2006-01-03 09:55:05 +0100 | [diff] [blame] | 3162 | .rpc_call_prepare = nfs4_locku_prepare, |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3163 | .rpc_call_done = nfs4_locku_done, |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 3164 | .rpc_release = nfs4_locku_release_calldata, |
Trond Myklebust | 963d8fe | 2006-01-03 09:55:04 +0100 | [diff] [blame] | 3165 | }; |
| 3166 | |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3167 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
| 3168 | struct nfs_open_context *ctx, |
| 3169 | struct nfs4_lock_state *lsp, |
| 3170 | struct nfs_seqid *seqid) |
| 3171 | { |
| 3172 | struct nfs4_unlockdata *data; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3173 | |
| 3174 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
| 3175 | if (data == NULL) { |
| 3176 | nfs_free_seqid(seqid); |
| 3177 | return ERR_PTR(-ENOMEM); |
| 3178 | } |
| 3179 | |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 3180 | return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3181 | } |
| 3182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3183 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3184 | { |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3185 | struct nfs_seqid *seqid; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3186 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 06f814a | 2006-01-03 09:55:07 +0100 | [diff] [blame] | 3187 | struct rpc_task *task; |
| 3188 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3190 | status = nfs4_set_lock_state(state, request); |
| 3191 | /* Unlock _before_ we do the RPC call */ |
| 3192 | request->fl_flags |= FL_EXISTS; |
| 3193 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) |
| 3194 | goto out; |
| 3195 | if (status != 0) |
| 3196 | goto out; |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3197 | /* Is this a delegated lock? */ |
| 3198 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3199 | goto out; |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3200 | lsp = request->fl_u.nfs4_fl.owner; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3201 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3202 | status = -ENOMEM; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3203 | if (seqid == NULL) |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3204 | goto out; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3205 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); |
| 3206 | status = PTR_ERR(task); |
| 3207 | if (IS_ERR(task)) |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3208 | goto out; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3209 | status = nfs4_wait_for_completion_rpc_task(task); |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 3210 | rpc_put_task(task); |
Trond Myklebust | 9b07357 | 2006-06-29 16:38:34 -0400 | [diff] [blame] | 3211 | out: |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3212 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3213 | } |
| 3214 | |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3215 | struct nfs4_lockdata { |
| 3216 | struct nfs_lock_args arg; |
Trond Myklebust | 911d1aa | 2006-01-03 09:55:16 +0100 | [diff] [blame] | 3217 | struct nfs_lock_res res; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3218 | struct nfs4_lock_state *lsp; |
| 3219 | struct nfs_open_context *ctx; |
| 3220 | struct file_lock fl; |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 3221 | unsigned long timestamp; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3222 | int rpc_status; |
| 3223 | int cancelled; |
| 3224 | }; |
| 3225 | |
| 3226 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
| 3227 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) |
| 3228 | { |
| 3229 | struct nfs4_lockdata *p; |
| 3230 | struct inode *inode = lsp->ls_state->inode; |
| 3231 | struct nfs_server *server = NFS_SERVER(inode); |
| 3232 | |
| 3233 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 3234 | if (p == NULL) |
| 3235 | return NULL; |
| 3236 | |
| 3237 | p->arg.fh = NFS_FH(inode); |
| 3238 | p->arg.fl = &p->fl; |
| 3239 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
| 3240 | if (p->arg.lock_seqid == NULL) |
| 3241 | goto out_free; |
| 3242 | p->arg.lock_stateid = &lsp->ls_stateid; |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 3243 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3244 | p->arg.lock_owner.id = lsp->ls_id; |
| 3245 | p->lsp = lsp; |
| 3246 | atomic_inc(&lsp->ls_count); |
| 3247 | p->ctx = get_nfs_open_context(ctx); |
| 3248 | memcpy(&p->fl, fl, sizeof(p->fl)); |
| 3249 | return p; |
| 3250 | out_free: |
| 3251 | kfree(p); |
| 3252 | return NULL; |
| 3253 | } |
| 3254 | |
| 3255 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
| 3256 | { |
| 3257 | struct nfs4_lockdata *data = calldata; |
| 3258 | struct nfs4_state *state = data->lsp->ls_state; |
| 3259 | struct nfs4_state_owner *sp = state->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | struct rpc_message msg = { |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3261 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
| 3262 | .rpc_argp = &data->arg, |
| 3263 | .rpc_resp = &data->res, |
| 3264 | .rpc_cred = sp->so_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3265 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3266 | |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3267 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
| 3268 | return; |
| 3269 | dprintk("%s: begin!\n", __FUNCTION__); |
| 3270 | /* Do we need to do an open_to_lock_owner? */ |
| 3271 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { |
| 3272 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); |
| 3273 | if (data->arg.open_seqid == NULL) { |
| 3274 | data->rpc_status = -ENOMEM; |
| 3275 | task->tk_action = NULL; |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3276 | goto out; |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3277 | } |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3278 | data->arg.open_stateid = &state->stateid; |
| 3279 | data->arg.new_lock_owner = 1; |
| 3280 | } |
Trond Myklebust | 26e976a | 2006-01-03 09:55:21 +0100 | [diff] [blame] | 3281 | data->timestamp = jiffies; |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3282 | rpc_call_setup(task, &msg, 0); |
Trond Myklebust | 06735b3 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 3283 | out: |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3284 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); |
| 3285 | } |
| 3286 | |
| 3287 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
| 3288 | { |
| 3289 | struct nfs4_lockdata *data = calldata; |
| 3290 | |
| 3291 | dprintk("%s: begin!\n", __FUNCTION__); |
| 3292 | |
| 3293 | data->rpc_status = task->tk_status; |
| 3294 | if (RPC_ASSASSINATED(task)) |
| 3295 | goto out; |
| 3296 | if (data->arg.new_lock_owner != 0) { |
| 3297 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); |
| 3298 | if (data->rpc_status == 0) |
| 3299 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); |
| 3300 | else |
| 3301 | goto out; |
| 3302 | } |
| 3303 | if (data->rpc_status == 0) { |
| 3304 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, |
| 3305 | sizeof(data->lsp->ls_stateid.data)); |
| 3306 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; |
Trond Myklebust | 88be9f9 | 2007-06-05 10:42:27 -0400 | [diff] [blame] | 3307 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3308 | } |
| 3309 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); |
| 3310 | out: |
| 3311 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); |
| 3312 | } |
| 3313 | |
| 3314 | static void nfs4_lock_release(void *calldata) |
| 3315 | { |
| 3316 | struct nfs4_lockdata *data = calldata; |
| 3317 | |
| 3318 | dprintk("%s: begin!\n", __FUNCTION__); |
| 3319 | if (data->arg.open_seqid != NULL) |
| 3320 | nfs_free_seqid(data->arg.open_seqid); |
| 3321 | if (data->cancelled != 0) { |
| 3322 | struct rpc_task *task; |
| 3323 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
| 3324 | data->arg.lock_seqid); |
| 3325 | if (!IS_ERR(task)) |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 3326 | rpc_put_task(task); |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3327 | dprintk("%s: cancelling lock!\n", __FUNCTION__); |
| 3328 | } else |
| 3329 | nfs_free_seqid(data->arg.lock_seqid); |
| 3330 | nfs4_put_lock_state(data->lsp); |
| 3331 | put_nfs_open_context(data->ctx); |
| 3332 | kfree(data); |
| 3333 | dprintk("%s: done!\n", __FUNCTION__); |
| 3334 | } |
| 3335 | |
| 3336 | static const struct rpc_call_ops nfs4_lock_ops = { |
| 3337 | .rpc_call_prepare = nfs4_lock_prepare, |
| 3338 | .rpc_call_done = nfs4_lock_done, |
| 3339 | .rpc_release = nfs4_lock_release, |
| 3340 | }; |
| 3341 | |
| 3342 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) |
| 3343 | { |
| 3344 | struct nfs4_lockdata *data; |
| 3345 | struct rpc_task *task; |
| 3346 | int ret; |
| 3347 | |
| 3348 | dprintk("%s: begin!\n", __FUNCTION__); |
| 3349 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, |
| 3350 | fl->fl_u.nfs4_fl.owner); |
| 3351 | if (data == NULL) |
| 3352 | return -ENOMEM; |
| 3353 | if (IS_SETLKW(cmd)) |
| 3354 | data->arg.block = 1; |
| 3355 | if (reclaim != 0) |
| 3356 | data->arg.reclaim = 1; |
| 3357 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, |
| 3358 | &nfs4_lock_ops, data); |
Trond Myklebust | 7a1218a | 2006-03-20 18:11:10 -0500 | [diff] [blame] | 3359 | if (IS_ERR(task)) |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3360 | return PTR_ERR(task); |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3361 | ret = nfs4_wait_for_completion_rpc_task(task); |
| 3362 | if (ret == 0) { |
| 3363 | ret = data->rpc_status; |
| 3364 | if (ret == -NFS4ERR_DENIED) |
| 3365 | ret = -EAGAIN; |
| 3366 | } else |
| 3367 | data->cancelled = 1; |
Trond Myklebust | e6b3c4d | 2006-11-11 22:18:03 -0500 | [diff] [blame] | 3368 | rpc_put_task(task); |
Trond Myklebust | a5d16a4 | 2006-01-03 09:55:17 +0100 | [diff] [blame] | 3369 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); |
| 3370 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3371 | } |
| 3372 | |
| 3373 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
| 3374 | { |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3375 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3376 | struct nfs4_exception exception = { }; |
| 3377 | int err; |
| 3378 | |
| 3379 | do { |
Trond Myklebust | 42a2d13 | 2006-06-29 16:38:36 -0400 | [diff] [blame] | 3380 | /* Cache the lock if possible... */ |
| 3381 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 3382 | return 0; |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3383 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
| 3384 | if (err != -NFS4ERR_DELAY) |
| 3385 | break; |
| 3386 | nfs4_handle_exception(server, err, &exception); |
| 3387 | } while (exception.retry); |
| 3388 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3389 | } |
| 3390 | |
| 3391 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
| 3392 | { |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3393 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3394 | struct nfs4_exception exception = { }; |
| 3395 | int err; |
| 3396 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3397 | err = nfs4_set_lock_state(state, request); |
| 3398 | if (err != 0) |
| 3399 | return err; |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3400 | do { |
Trond Myklebust | 42a2d13 | 2006-06-29 16:38:36 -0400 | [diff] [blame] | 3401 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
| 3402 | return 0; |
Trond Myklebust | 202b50d | 2005-06-22 17:16:29 +0000 | [diff] [blame] | 3403 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
| 3404 | if (err != -NFS4ERR_DELAY) |
| 3405 | break; |
| 3406 | nfs4_handle_exception(server, err, &exception); |
| 3407 | } while (exception.retry); |
| 3408 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | } |
| 3410 | |
| 3411 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3412 | { |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 3413 | struct nfs_client *clp = state->owner->so_client; |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3414 | unsigned char fl_flags = request->fl_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3415 | int status; |
| 3416 | |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3417 | /* Is this a delegated open? */ |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3418 | status = nfs4_set_lock_state(state, request); |
| 3419 | if (status != 0) |
| 3420 | goto out; |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3421 | request->fl_flags |= FL_ACCESS; |
| 3422 | status = do_vfs_lock(request->fl_file, request); |
| 3423 | if (status < 0) |
| 3424 | goto out; |
| 3425 | down_read(&clp->cl_sem); |
| 3426 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| 3427 | struct nfs_inode *nfsi = NFS_I(state->inode); |
| 3428 | /* Yes: cache locks! */ |
| 3429 | down_read(&nfsi->rwsem); |
| 3430 | /* ...but avoid races with delegation recall... */ |
| 3431 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| 3432 | request->fl_flags = fl_flags & ~FL_SLEEP; |
| 3433 | status = do_vfs_lock(request->fl_file, request); |
| 3434 | up_read(&nfsi->rwsem); |
| 3435 | goto out_unlock; |
| 3436 | } |
| 3437 | up_read(&nfsi->rwsem); |
| 3438 | } |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3439 | status = _nfs4_do_setlk(state, cmd, request, 0); |
| 3440 | if (status != 0) |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3441 | goto out_unlock; |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3442 | /* Note: we always want to sleep here! */ |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3443 | request->fl_flags = fl_flags | FL_SLEEP; |
Trond Myklebust | 6bfc93e | 2005-11-04 15:39:36 -0500 | [diff] [blame] | 3444 | if (do_vfs_lock(request->fl_file, request) < 0) |
| 3445 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3446 | out_unlock: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3447 | up_read(&clp->cl_sem); |
Trond Myklebust | 01c3b86 | 2006-06-29 16:38:39 -0400 | [diff] [blame] | 3448 | out: |
| 3449 | request->fl_flags = fl_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3450 | return status; |
| 3451 | } |
| 3452 | |
| 3453 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
| 3454 | { |
| 3455 | struct nfs4_exception exception = { }; |
| 3456 | int err; |
| 3457 | |
| 3458 | do { |
| 3459 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
| 3460 | _nfs4_proc_setlk(state, cmd, request), |
| 3461 | &exception); |
| 3462 | } while (exception.retry); |
| 3463 | return err; |
| 3464 | } |
| 3465 | |
| 3466 | static int |
| 3467 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
| 3468 | { |
| 3469 | struct nfs_open_context *ctx; |
| 3470 | struct nfs4_state *state; |
| 3471 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
| 3472 | int status; |
| 3473 | |
| 3474 | /* verify open state */ |
| 3475 | ctx = (struct nfs_open_context *)filp->private_data; |
| 3476 | state = ctx->state; |
| 3477 | |
| 3478 | if (request->fl_start < 0 || request->fl_end < 0) |
| 3479 | return -EINVAL; |
| 3480 | |
| 3481 | if (IS_GETLK(cmd)) |
| 3482 | return nfs4_proc_getlk(state, F_GETLK, request); |
| 3483 | |
| 3484 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
| 3485 | return -EINVAL; |
| 3486 | |
| 3487 | if (request->fl_type == F_UNLCK) |
| 3488 | return nfs4_proc_unlck(state, cmd, request); |
| 3489 | |
| 3490 | do { |
| 3491 | status = nfs4_proc_setlk(state, cmd, request); |
| 3492 | if ((status != -EAGAIN) || IS_SETLK(cmd)) |
| 3493 | break; |
| 3494 | timeout = nfs4_set_lock_task_retry(timeout); |
| 3495 | status = -ERESTARTSYS; |
| 3496 | if (signalled()) |
| 3497 | break; |
| 3498 | } while(status < 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3499 | return status; |
| 3500 | } |
| 3501 | |
Trond Myklebust | 888e694 | 2005-11-04 15:38:11 -0500 | [diff] [blame] | 3502 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
| 3503 | { |
| 3504 | struct nfs_server *server = NFS_SERVER(state->inode); |
| 3505 | struct nfs4_exception exception = { }; |
| 3506 | int err; |
| 3507 | |
| 3508 | err = nfs4_set_lock_state(state, fl); |
| 3509 | if (err != 0) |
| 3510 | goto out; |
| 3511 | do { |
| 3512 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); |
| 3513 | if (err != -NFS4ERR_DELAY) |
| 3514 | break; |
| 3515 | err = nfs4_handle_exception(server, err, &exception); |
| 3516 | } while (exception.retry); |
| 3517 | out: |
| 3518 | return err; |
| 3519 | } |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3520 | |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3521 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
| 3522 | |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3523 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
| 3524 | size_t buflen, int flags) |
| 3525 | { |
J. Bruce Fields | 4b580ee | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 3526 | struct inode *inode = dentry->d_inode; |
| 3527 | |
| 3528 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 3529 | return -EOPNOTSUPP; |
| 3530 | |
| 3531 | if (!S_ISREG(inode->i_mode) && |
| 3532 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) |
| 3533 | return -EPERM; |
| 3534 | |
| 3535 | return nfs4_proc_set_acl(inode, buf, buflen); |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3536 | } |
| 3537 | |
| 3538 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, |
| 3539 | * and that's what we'll do for e.g. user attributes that haven't been set. |
| 3540 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported |
| 3541 | * attributes in kernel-managed attribute namespaces. */ |
| 3542 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, |
| 3543 | size_t buflen) |
| 3544 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3545 | struct inode *inode = dentry->d_inode; |
| 3546 | |
| 3547 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) |
| 3548 | return -EOPNOTSUPP; |
| 3549 | |
| 3550 | return nfs4_proc_get_acl(inode, buf, buflen); |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3551 | } |
| 3552 | |
| 3553 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) |
| 3554 | { |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3555 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3556 | |
J. Bruce Fields | 096455a | 2006-03-20 23:23:42 -0500 | [diff] [blame] | 3557 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
| 3558 | return 0; |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3559 | if (buf && buflen < len) |
| 3560 | return -ERANGE; |
| 3561 | if (buf) |
J. Bruce Fields | aa1870a | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3562 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
| 3563 | return len; |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3564 | } |
| 3565 | |
Trond Myklebust | c228fd3 | 2007-01-13 02:28:11 -0500 | [diff] [blame] | 3566 | int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name, |
Manoj Naik | 7aaa0b3 | 2006-06-09 09:34:23 -0400 | [diff] [blame] | 3567 | struct nfs4_fs_locations *fs_locations, struct page *page) |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3568 | { |
| 3569 | struct nfs_server *server = NFS_SERVER(dir); |
| 3570 | u32 bitmask[2] = { |
Manoj Naik | 361e624 | 2006-06-09 09:34:24 -0400 | [diff] [blame] | 3571 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
| 3572 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3573 | }; |
| 3574 | struct nfs4_fs_locations_arg args = { |
| 3575 | .dir_fh = NFS_FH(dir), |
Trond Myklebust | c228fd3 | 2007-01-13 02:28:11 -0500 | [diff] [blame] | 3576 | .name = name, |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3577 | .page = page, |
| 3578 | .bitmask = bitmask, |
| 3579 | }; |
| 3580 | struct rpc_message msg = { |
| 3581 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
| 3582 | .rpc_argp = &args, |
Manoj Naik | 7aaa0b3 | 2006-06-09 09:34:23 -0400 | [diff] [blame] | 3583 | .rpc_resp = fs_locations, |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3584 | }; |
| 3585 | int status; |
| 3586 | |
| 3587 | dprintk("%s: start\n", __FUNCTION__); |
Trond Myklebust | c228fd3 | 2007-01-13 02:28:11 -0500 | [diff] [blame] | 3588 | nfs_fattr_init(&fs_locations->fattr); |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3589 | fs_locations->server = server; |
Manoj Naik | 830b8e3 | 2006-06-09 09:34:25 -0400 | [diff] [blame] | 3590 | fs_locations->nlocations = 0; |
Trond Myklebust | 683b57b | 2006-06-09 09:34:22 -0400 | [diff] [blame] | 3591 | status = rpc_call_sync(server->client, &msg, 0); |
| 3592 | dprintk("%s: returned status = %d\n", __FUNCTION__, status); |
| 3593 | return status; |
| 3594 | } |
| 3595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3596 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
| 3597 | .recover_open = nfs4_open_reclaim, |
| 3598 | .recover_lock = nfs4_lock_reclaim, |
| 3599 | }; |
| 3600 | |
| 3601 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { |
| 3602 | .recover_open = nfs4_open_expired, |
| 3603 | .recover_lock = nfs4_lock_expired, |
| 3604 | }; |
| 3605 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 3606 | static const struct inode_operations nfs4_file_inode_operations = { |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3607 | .permission = nfs_permission, |
| 3608 | .getattr = nfs_getattr, |
| 3609 | .setattr = nfs_setattr, |
| 3610 | .getxattr = nfs4_getxattr, |
| 3611 | .setxattr = nfs4_setxattr, |
| 3612 | .listxattr = nfs4_listxattr, |
| 3613 | }; |
| 3614 | |
David Howells | 509de81 | 2006-08-22 20:06:11 -0400 | [diff] [blame] | 3615 | const struct nfs_rpc_ops nfs_v4_clientops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3616 | .version = 4, /* protocol version */ |
| 3617 | .dentry_ops = &nfs4_dentry_operations, |
| 3618 | .dir_inode_ops = &nfs4_dir_inode_operations, |
J. Bruce Fields | 6b3b549 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 3619 | .file_inode_ops = &nfs4_file_inode_operations, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3620 | .getroot = nfs4_proc_get_root, |
| 3621 | .getattr = nfs4_proc_getattr, |
| 3622 | .setattr = nfs4_proc_setattr, |
David Howells | 2b3de44 | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 3623 | .lookupfh = nfs4_proc_lookupfh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3624 | .lookup = nfs4_proc_lookup, |
| 3625 | .access = nfs4_proc_access, |
| 3626 | .readlink = nfs4_proc_readlink, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3627 | .create = nfs4_proc_create, |
| 3628 | .remove = nfs4_proc_remove, |
| 3629 | .unlink_setup = nfs4_proc_unlink_setup, |
| 3630 | .unlink_done = nfs4_proc_unlink_done, |
| 3631 | .rename = nfs4_proc_rename, |
| 3632 | .link = nfs4_proc_link, |
| 3633 | .symlink = nfs4_proc_symlink, |
| 3634 | .mkdir = nfs4_proc_mkdir, |
| 3635 | .rmdir = nfs4_proc_remove, |
| 3636 | .readdir = nfs4_proc_readdir, |
| 3637 | .mknod = nfs4_proc_mknod, |
| 3638 | .statfs = nfs4_proc_statfs, |
| 3639 | .fsinfo = nfs4_proc_fsinfo, |
| 3640 | .pathconf = nfs4_proc_pathconf, |
David Howells | e9326dc | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 3641 | .set_capabilities = nfs4_server_capabilities, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3642 | .decode_dirent = nfs4_decode_dirent, |
| 3643 | .read_setup = nfs4_proc_read_setup, |
Trond Myklebust | ec06c09 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 3644 | .read_done = nfs4_read_done, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3645 | .write_setup = nfs4_proc_write_setup, |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 3646 | .write_done = nfs4_write_done, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3647 | .commit_setup = nfs4_proc_commit_setup, |
Trond Myklebust | 788e7a8 | 2006-03-20 13:44:27 -0500 | [diff] [blame] | 3648 | .commit_done = nfs4_commit_done, |
Trond Myklebust | 02a913a | 2005-10-18 14:20:17 -0700 | [diff] [blame] | 3649 | .file_open = nfs_open, |
| 3650 | .file_release = nfs_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3651 | .lock = nfs4_proc_lock, |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 3652 | .clear_acl_cache = nfs4_zap_acl_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3653 | }; |
| 3654 | |
| 3655 | /* |
| 3656 | * Local variables: |
| 3657 | * c-basic-offset: 8 |
| 3658 | * End: |
| 3659 | */ |