Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2002 Red Hat, Inc. All rights reserved. | |
3 | * | |
4 | * This software may be freely redistributed under the terms of the | |
5 | * GNU General Public License. | |
6 | * | |
7 | * You should have received a copy of the GNU General Public License | |
8 | * along with this program; if not, write to the Free Software | |
9 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
10 | * | |
44d1b980 | 11 | * Authors: David Woodhouse <dwmw2@infradead.org> |
1da177e4 LT |
12 | * David Howells <dhowells@redhat.com> |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
1da177e4 LT |
19 | #include <linux/fs.h> |
20 | #include <linux/pagemap.h> | |
e8edc6e0 | 21 | #include <linux/sched.h> |
bec5eb61 | 22 | #include <linux/mount.h> |
23 | #include <linux/namei.h> | |
a01179e6 | 24 | #include <linux/iversion.h> |
1da177e4 | 25 | #include "internal.h" |
a38a7558 | 26 | #include "afs_fs.h" |
1da177e4 | 27 | |
d3e3b7ea DH |
28 | static const struct inode_operations afs_symlink_inode_operations = { |
29 | .get_link = page_get_link, | |
d3e3b7ea DH |
30 | }; |
31 | ||
b134d687 DH |
32 | static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode) |
33 | { | |
34 | static unsigned long once_only; | |
35 | ||
a4e530ae | 36 | pr_warn("kAFS: AFS vnode with undefined type %u\n", vnode->status.type); |
b134d687 DH |
37 | pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n", |
38 | vnode->status.abort_code, | |
39 | vnode->status.mode, | |
40 | vnode->status.size, | |
41 | vnode->status.data_version); | |
42 | pr_warn("kAFS: vnode %llx:%llx:%x\n", | |
43 | vnode->fid.vid, | |
44 | vnode->fid.vnode, | |
45 | vnode->fid.unique); | |
46 | if (parent_vnode) | |
47 | pr_warn("kAFS: dir %llx:%llx:%x\n", | |
48 | parent_vnode->fid.vid, | |
49 | parent_vnode->fid.vnode, | |
50 | parent_vnode->fid.unique); | |
51 | ||
52 | if (!test_and_set_bit(0, &once_only)) | |
53 | dump_stack(); | |
54 | } | |
55 | ||
2cd42d19 DH |
56 | /* |
57 | * Set the file size and block count. Estimate the number of 512 bytes blocks | |
58 | * used, rounded up to nearest 1K for consistency with other AFS clients. | |
59 | */ | |
60 | static void afs_set_i_size(struct afs_vnode *vnode, u64 size) | |
61 | { | |
62 | i_size_write(&vnode->vfs_inode, size); | |
63 | vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1; | |
64 | } | |
65 | ||
1da177e4 | 66 | /* |
dd9fbcb8 | 67 | * Initialise an inode from the vnode status. |
1da177e4 | 68 | */ |
e49c7b2f DH |
69 | static int afs_inode_init_from_status(struct afs_operation *op, |
70 | struct afs_vnode_param *vp, | |
71 | struct afs_vnode *vnode) | |
1da177e4 | 72 | { |
e49c7b2f | 73 | struct afs_file_status *status = &vp->scb.status; |
1da177e4 | 74 | struct inode *inode = AFS_VNODE_TO_I(vnode); |
a58823ac | 75 | struct timespec64 t; |
1da177e4 | 76 | |
e49c7b2f DH |
77 | _enter("{%llx:%llu.%u} %s", |
78 | vp->fid.vid, vp->fid.vnode, vp->fid.unique, | |
79 | op->type ? op->type->name : "???"); | |
80 | ||
260a9803 | 81 | _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu", |
a58823ac DH |
82 | status->type, |
83 | status->nlink, | |
84 | (unsigned long long) status->size, | |
85 | status->data_version, | |
86 | status->mode); | |
1da177e4 | 87 | |
a58823ac DH |
88 | write_seqlock(&vnode->cb_lock); |
89 | ||
e49c7b2f DH |
90 | vnode->cb_v_break = op->cb_v_break; |
91 | vnode->cb_s_break = op->cb_s_break; | |
a58823ac | 92 | vnode->status = *status; |
c435ee34 | 93 | |
a58823ac DH |
94 | t = status->mtime_client; |
95 | inode->i_ctime = t; | |
96 | inode->i_mtime = t; | |
97 | inode->i_atime = t; | |
e49c7b2f | 98 | inode->i_flags |= S_NOATIME; |
a58823ac DH |
99 | inode->i_uid = make_kuid(&init_user_ns, status->owner); |
100 | inode->i_gid = make_kgid(&init_user_ns, status->group); | |
101 | set_nlink(&vnode->vfs_inode, status->nlink); | |
dd9fbcb8 | 102 | |
a58823ac | 103 | switch (status->type) { |
1da177e4 | 104 | case AFS_FTYPE_FILE: |
6e1eb04a | 105 | inode->i_mode = S_IFREG | (status->mode & S_IALLUGO); |
1da177e4 | 106 | inode->i_op = &afs_file_inode_operations; |
00d3b7a4 | 107 | inode->i_fop = &afs_file_operations; |
f3ddee8d | 108 | inode->i_mapping->a_ops = &afs_fs_aops; |
1da177e4 LT |
109 | break; |
110 | case AFS_FTYPE_DIR: | |
6e1eb04a | 111 | inode->i_mode = S_IFDIR | (status->mode & S_IALLUGO); |
1da177e4 LT |
112 | inode->i_op = &afs_dir_inode_operations; |
113 | inode->i_fop = &afs_dir_file_operations; | |
f3ddee8d | 114 | inode->i_mapping->a_ops = &afs_dir_aops; |
1da177e4 LT |
115 | break; |
116 | case AFS_FTYPE_SYMLINK: | |
944c74f4 | 117 | /* Symlinks with a mode of 0644 are actually mountpoints. */ |
a58823ac | 118 | if ((status->mode & 0777) == 0644) { |
944c74f4 DH |
119 | inode->i_flags |= S_AUTOMOUNT; |
120 | ||
944c74f4 | 121 | set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags); |
944c74f4 DH |
122 | |
123 | inode->i_mode = S_IFDIR | 0555; | |
124 | inode->i_op = &afs_mntpt_inode_operations; | |
125 | inode->i_fop = &afs_mntpt_file_operations; | |
f3ddee8d | 126 | inode->i_mapping->a_ops = &afs_fs_aops; |
944c74f4 | 127 | } else { |
a58823ac | 128 | inode->i_mode = S_IFLNK | status->mode; |
d3e3b7ea | 129 | inode->i_op = &afs_symlink_inode_operations; |
f3ddee8d | 130 | inode->i_mapping->a_ops = &afs_fs_aops; |
944c74f4 | 131 | } |
21fc61c7 | 132 | inode_nohighmem(inode); |
1da177e4 LT |
133 | break; |
134 | default: | |
e49c7b2f | 135 | dump_vnode(vnode, op->file[0].vnode != vnode ? op->file[0].vnode : NULL); |
a58823ac | 136 | write_sequnlock(&vnode->cb_lock); |
7126ead9 | 137 | return afs_protocol_error(NULL, afs_eproto_file_type); |
1da177e4 LT |
138 | } |
139 | ||
2cd42d19 | 140 | afs_set_i_size(vnode, status->size); |
c435ee34 | 141 | |
a58823ac DH |
142 | vnode->invalid_before = status->data_version; |
143 | inode_set_iversion_raw(&vnode->vfs_inode, status->data_version); | |
144 | ||
e49c7b2f | 145 | if (!vp->scb.have_cb) { |
a58823ac DH |
146 | /* it's a symlink we just created (the fileserver |
147 | * didn't give us a callback) */ | |
a58823ac DH |
148 | vnode->cb_expires_at = ktime_get_real_seconds(); |
149 | } else { | |
e49c7b2f | 150 | vnode->cb_expires_at = vp->scb.callback.expires_at; |
20325960 | 151 | vnode->cb_server = op->server; |
a58823ac DH |
152 | set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); |
153 | } | |
154 | ||
155 | write_sequnlock(&vnode->cb_lock); | |
1da177e4 | 156 | return 0; |
ec26815a | 157 | } |
1da177e4 | 158 | |
a58823ac DH |
159 | /* |
160 | * Update the core inode struct from a returned status record. | |
161 | */ | |
e49c7b2f DH |
162 | static void afs_apply_status(struct afs_operation *op, |
163 | struct afs_vnode_param *vp) | |
a58823ac | 164 | { |
e49c7b2f DH |
165 | struct afs_file_status *status = &vp->scb.status; |
166 | struct afs_vnode *vnode = vp->vnode; | |
da8d0755 | 167 | struct inode *inode = &vnode->vfs_inode; |
a58823ac DH |
168 | struct timespec64 t; |
169 | umode_t mode; | |
170 | bool data_changed = false; | |
793fe82e | 171 | bool change_size = vp->set_size; |
a58823ac | 172 | |
e49c7b2f DH |
173 | _enter("{%llx:%llu.%u} %s", |
174 | vp->fid.vid, vp->fid.vnode, vp->fid.unique, | |
175 | op->type ? op->type->name : "???"); | |
176 | ||
a58823ac DH |
177 | BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags)); |
178 | ||
179 | if (status->type != vnode->status.type) { | |
a4e530ae KW |
180 | pr_warn("Vnode %llx:%llx:%x changed type %u to %u\n", |
181 | vnode->fid.vid, | |
182 | vnode->fid.vnode, | |
183 | vnode->fid.unique, | |
184 | status->type, vnode->status.type); | |
7126ead9 | 185 | afs_protocol_error(NULL, afs_eproto_bad_status); |
a58823ac DH |
186 | return; |
187 | } | |
188 | ||
189 | if (status->nlink != vnode->status.nlink) | |
da8d0755 | 190 | set_nlink(inode, status->nlink); |
a58823ac DH |
191 | |
192 | if (status->owner != vnode->status.owner) | |
da8d0755 | 193 | inode->i_uid = make_kuid(&init_user_ns, status->owner); |
a58823ac DH |
194 | |
195 | if (status->group != vnode->status.group) | |
da8d0755 | 196 | inode->i_gid = make_kgid(&init_user_ns, status->group); |
a58823ac DH |
197 | |
198 | if (status->mode != vnode->status.mode) { | |
da8d0755 | 199 | mode = inode->i_mode; |
a58823ac | 200 | mode &= ~S_IALLUGO; |
6e1eb04a | 201 | mode |= status->mode & S_IALLUGO; |
da8d0755 | 202 | WRITE_ONCE(inode->i_mode, mode); |
a58823ac DH |
203 | } |
204 | ||
205 | t = status->mtime_client; | |
da8d0755 DH |
206 | inode->i_mtime = t; |
207 | if (vp->update_ctime) | |
208 | inode->i_ctime = op->ctime; | |
a58823ac DH |
209 | |
210 | if (vnode->status.data_version != status->data_version) | |
211 | data_changed = true; | |
212 | ||
213 | vnode->status = *status; | |
214 | ||
e49c7b2f | 215 | if (vp->dv_before + vp->dv_delta != status->data_version) { |
3647e42b | 216 | if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) |
f015cf1d | 217 | pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s (op=%x)\n", |
3647e42b | 218 | vnode->fid.vid, vnode->fid.vnode, |
e49c7b2f | 219 | (unsigned long long)vp->dv_before + vp->dv_delta, |
3647e42b | 220 | (unsigned long long)status->data_version, |
f015cf1d DH |
221 | op->type ? op->type->name : "???", |
222 | op->debug_id); | |
3647e42b | 223 | |
a58823ac DH |
224 | vnode->invalid_before = status->data_version; |
225 | if (vnode->status.type == AFS_FTYPE_DIR) { | |
226 | if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags)) | |
227 | afs_stat_v(vnode, n_inval); | |
228 | } else { | |
229 | set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags); | |
230 | } | |
3f4aa981 | 231 | change_size = true; |
a58823ac DH |
232 | } else if (vnode->status.type == AFS_FTYPE_DIR) { |
233 | /* Expected directory change is handled elsewhere so | |
234 | * that we can locally edit the directory and save on a | |
235 | * download. | |
236 | */ | |
237 | if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags)) | |
238 | data_changed = false; | |
3f4aa981 | 239 | change_size = true; |
a58823ac DH |
240 | } |
241 | ||
242 | if (data_changed) { | |
da8d0755 | 243 | inode_set_iversion_raw(inode, status->data_version); |
3f4aa981 DH |
244 | |
245 | /* Only update the size if the data version jumped. If the | |
246 | * file is being modified locally, then we might have our own | |
247 | * idea of what the size should be that's not the same as | |
248 | * what's on the server. | |
249 | */ | |
da8d0755 | 250 | if (change_size) { |
3f4aa981 | 251 | afs_set_i_size(vnode, status->size); |
da8d0755 DH |
252 | inode->i_ctime = t; |
253 | inode->i_atime = t; | |
254 | } | |
a58823ac DH |
255 | } |
256 | } | |
257 | ||
258 | /* | |
259 | * Apply a callback to a vnode. | |
260 | */ | |
e49c7b2f DH |
261 | static void afs_apply_callback(struct afs_operation *op, |
262 | struct afs_vnode_param *vp) | |
a58823ac | 263 | { |
e49c7b2f DH |
264 | struct afs_callback *cb = &vp->scb.callback; |
265 | struct afs_vnode *vnode = vp->vnode; | |
a58823ac | 266 | |
20325960 | 267 | if (!afs_cb_is_broken(vp->cb_break_before, vnode)) { |
a58823ac | 268 | vnode->cb_expires_at = cb->expires_at; |
20325960 | 269 | vnode->cb_server = op->server; |
a58823ac DH |
270 | set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags); |
271 | } | |
272 | } | |
273 | ||
274 | /* | |
275 | * Apply the received status and callback to an inode all in the same critical | |
276 | * section to avoid races with afs_validate(). | |
277 | */ | |
e49c7b2f | 278 | void afs_vnode_commit_status(struct afs_operation *op, struct afs_vnode_param *vp) |
a58823ac | 279 | { |
e49c7b2f DH |
280 | struct afs_vnode *vnode = vp->vnode; |
281 | ||
282 | _enter(""); | |
283 | ||
a58823ac DH |
284 | write_seqlock(&vnode->cb_lock); |
285 | ||
e49c7b2f | 286 | if (vp->scb.have_error) { |
b6489a49 DH |
287 | /* A YFS server will return this from RemoveFile2 and AFS and |
288 | * YFS will return this from InlineBulkStatus. | |
289 | */ | |
e49c7b2f | 290 | if (vp->scb.status.abort_code == VNOVNODE) { |
a38a7558 DH |
291 | set_bit(AFS_VNODE_DELETED, &vnode->flags); |
292 | clear_nlink(&vnode->vfs_inode); | |
051d2525 | 293 | __afs_break_callback(vnode, afs_cb_break_for_deleted); |
b6489a49 | 294 | op->flags &= ~AFS_OPERATION_DIR_CONFLICT; |
a38a7558 | 295 | } |
b6489a49 | 296 | } else if (vp->scb.have_status) { |
22650f14 DH |
297 | if (vp->speculative && |
298 | (test_bit(AFS_VNODE_MODIFYING, &vnode->flags) || | |
299 | vp->dv_before != vnode->status.data_version)) | |
a9e5c87c DH |
300 | /* Ignore the result of a speculative bulk status fetch |
301 | * if it splits around a modification op, thereby | |
302 | * appearing to regress the data version. | |
303 | */ | |
304 | goto out; | |
b6489a49 | 305 | afs_apply_status(op, vp); |
e49c7b2f DH |
306 | if (vp->scb.have_cb) |
307 | afs_apply_callback(op, vp); | |
b6489a49 DH |
308 | } else if (vp->op_unlinked && !(op->flags & AFS_OPERATION_DIR_CONFLICT)) { |
309 | drop_nlink(&vnode->vfs_inode); | |
310 | if (vnode->vfs_inode.i_nlink == 0) { | |
311 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
312 | __afs_break_callback(vnode, afs_cb_break_for_deleted); | |
313 | } | |
a38a7558 | 314 | } |
a58823ac | 315 | |
a9e5c87c | 316 | out: |
a58823ac DH |
317 | write_sequnlock(&vnode->cb_lock); |
318 | ||
7c295eec | 319 | if (vp->scb.have_status) |
e49c7b2f | 320 | afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb); |
a58823ac DH |
321 | } |
322 | ||
e49c7b2f DH |
323 | static void afs_fetch_status_success(struct afs_operation *op) |
324 | { | |
b6489a49 | 325 | struct afs_vnode_param *vp = &op->file[op->fetch_status.which]; |
e49c7b2f DH |
326 | struct afs_vnode *vnode = vp->vnode; |
327 | int ret; | |
328 | ||
329 | if (vnode->vfs_inode.i_state & I_NEW) { | |
330 | ret = afs_inode_init_from_status(op, vp, vnode); | |
331 | op->error = ret; | |
332 | if (ret == 0) | |
333 | afs_cache_permit(vnode, op->key, vp->cb_break_before, &vp->scb); | |
334 | } else { | |
335 | afs_vnode_commit_status(op, vp); | |
336 | } | |
337 | } | |
338 | ||
b6489a49 | 339 | const struct afs_operation_ops afs_fetch_status_operation = { |
e49c7b2f DH |
340 | .issue_afs_rpc = afs_fs_fetch_status, |
341 | .issue_yfs_rpc = yfs_fs_fetch_status, | |
342 | .success = afs_fetch_status_success, | |
728279a5 | 343 | .aborted = afs_check_for_remote_deletion, |
e49c7b2f DH |
344 | }; |
345 | ||
d2ddc776 DH |
346 | /* |
347 | * Fetch file status from the volume. | |
348 | */ | |
a58823ac DH |
349 | int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool is_new, |
350 | afs_access_t *_caller_access) | |
d2ddc776 | 351 | { |
e49c7b2f | 352 | struct afs_operation *op; |
d2ddc776 | 353 | |
3b6492df | 354 | _enter("%s,{%llx:%llu.%u,S=%lx}", |
d2ddc776 DH |
355 | vnode->volume->name, |
356 | vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique, | |
357 | vnode->flags); | |
358 | ||
e49c7b2f DH |
359 | op = afs_alloc_operation(key, vnode->volume); |
360 | if (IS_ERR(op)) | |
361 | return PTR_ERR(op); | |
a58823ac | 362 | |
e49c7b2f | 363 | afs_op_set_vnode(op, 0, vnode); |
a58823ac | 364 | |
e49c7b2f DH |
365 | op->nr_files = 1; |
366 | op->ops = &afs_fetch_status_operation; | |
367 | afs_begin_vnode_operation(op); | |
368 | afs_wait_for_operation(op); | |
d2ddc776 | 369 | |
e49c7b2f DH |
370 | if (_caller_access) |
371 | *_caller_access = op->file[0].scb.status.caller_access; | |
372 | return afs_put_operation(op); | |
d2ddc776 DH |
373 | } |
374 | ||
1da177e4 | 375 | /* |
e49c7b2f | 376 | * ilookup() comparator |
1da177e4 | 377 | */ |
e49c7b2f | 378 | int afs_ilookup5_test_by_fid(struct inode *inode, void *opaque) |
1da177e4 | 379 | { |
3b6492df | 380 | struct afs_vnode *vnode = AFS_FS_I(inode); |
e49c7b2f | 381 | struct afs_fid *fid = opaque; |
1da177e4 | 382 | |
e49c7b2f DH |
383 | return (fid->vnode == vnode->fid.vnode && |
384 | fid->vnode_hi == vnode->fid.vnode_hi && | |
385 | fid->unique == vnode->fid.unique); | |
ec26815a | 386 | } |
1da177e4 | 387 | |
bec5eb61 | 388 | /* |
e49c7b2f | 389 | * iget5() comparator |
bec5eb61 | 390 | */ |
e49c7b2f | 391 | static int afs_iget5_test(struct inode *inode, void *opaque) |
bec5eb61 | 392 | { |
e49c7b2f DH |
393 | struct afs_vnode_param *vp = opaque; |
394 | //struct afs_vnode *vnode = AFS_FS_I(inode); | |
395 | ||
396 | return afs_ilookup5_test_by_fid(inode, &vp->fid); | |
bec5eb61 | 397 | } |
398 | ||
1da177e4 LT |
399 | /* |
400 | * iget5() inode initialiser | |
401 | */ | |
402 | static int afs_iget5_set(struct inode *inode, void *opaque) | |
403 | { | |
e49c7b2f DH |
404 | struct afs_vnode_param *vp = opaque; |
405 | struct afs_super_info *as = AFS_FS_S(inode->i_sb); | |
1da177e4 LT |
406 | struct afs_vnode *vnode = AFS_FS_I(inode); |
407 | ||
e49c7b2f DH |
408 | vnode->volume = as->volume; |
409 | vnode->fid = vp->fid; | |
1da177e4 | 410 | |
3b6492df DH |
411 | /* YFS supports 96-bit vnode IDs, but Linux only supports |
412 | * 64-bit inode numbers. | |
413 | */ | |
e49c7b2f DH |
414 | inode->i_ino = vnode->fid.vnode; |
415 | inode->i_generation = vnode->fid.unique; | |
1da177e4 | 416 | return 0; |
ec26815a | 417 | } |
1da177e4 | 418 | |
402cb8dd DH |
419 | /* |
420 | * Get a cache cookie for an inode. | |
421 | */ | |
422 | static void afs_get_inode_cache(struct afs_vnode *vnode) | |
423 | { | |
424 | #ifdef CONFIG_AFS_FSCACHE | |
425 | struct { | |
426 | u32 vnode_id; | |
427 | u32 unique; | |
428 | u32 vnode_id_ext[2]; /* Allow for a 96-bit key */ | |
429 | } __packed key; | |
430 | struct afs_vnode_cache_aux aux; | |
431 | ||
03ffae90 | 432 | if (vnode->status.type != AFS_FTYPE_FILE) { |
f3ddee8d DH |
433 | vnode->cache = NULL; |
434 | return; | |
435 | } | |
436 | ||
402cb8dd DH |
437 | key.vnode_id = vnode->fid.vnode; |
438 | key.unique = vnode->fid.unique; | |
3b6492df DH |
439 | key.vnode_id_ext[0] = vnode->fid.vnode >> 32; |
440 | key.vnode_id_ext[1] = vnode->fid.vnode_hi; | |
402cb8dd DH |
441 | aux.data_version = vnode->status.data_version; |
442 | ||
443 | vnode->cache = fscache_acquire_cookie(vnode->volume->cache, | |
444 | &afs_vnode_cache_index_def, | |
445 | &key, sizeof(key), | |
446 | &aux, sizeof(aux), | |
ee1235a9 | 447 | vnode, vnode->status.size, true); |
402cb8dd DH |
448 | #endif |
449 | } | |
450 | ||
1da177e4 LT |
451 | /* |
452 | * inode retrieval | |
453 | */ | |
e49c7b2f | 454 | struct inode *afs_iget(struct afs_operation *op, struct afs_vnode_param *vp) |
1da177e4 | 455 | { |
e49c7b2f DH |
456 | struct afs_vnode_param *dvp = &op->file[0]; |
457 | struct super_block *sb = dvp->vnode->vfs_inode.i_sb; | |
1da177e4 LT |
458 | struct afs_vnode *vnode; |
459 | struct inode *inode; | |
460 | int ret; | |
461 | ||
e49c7b2f | 462 | _enter(",{%llx:%llu.%u},,", vp->fid.vid, vp->fid.vnode, vp->fid.unique); |
1da177e4 | 463 | |
e49c7b2f | 464 | inode = iget5_locked(sb, vp->fid.vnode, afs_iget5_test, afs_iget5_set, vp); |
1da177e4 LT |
465 | if (!inode) { |
466 | _leave(" = -ENOMEM"); | |
08e0e7c8 | 467 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
468 | } |
469 | ||
470 | vnode = AFS_FS_I(inode); | |
471 | ||
e49c7b2f DH |
472 | _debug("GOT INODE %p { vl=%llx vn=%llx, u=%x }", |
473 | inode, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); | |
474 | ||
1da177e4 LT |
475 | /* deal with an existing inode */ |
476 | if (!(inode->i_state & I_NEW)) { | |
08e0e7c8 DH |
477 | _leave(" = %p", inode); |
478 | return inode; | |
1da177e4 LT |
479 | } |
480 | ||
e49c7b2f DH |
481 | ret = afs_inode_init_from_status(op, vp, vnode); |
482 | if (ret < 0) | |
483 | goto bad_inode; | |
260a9803 | 484 | |
5800db81 DH |
485 | afs_get_inode_cache(vnode); |
486 | ||
1da177e4 | 487 | /* success */ |
260a9803 | 488 | clear_bit(AFS_VNODE_UNSET, &vnode->flags); |
1da177e4 | 489 | unlock_new_inode(inode); |
7c712458 | 490 | _leave(" = %p", inode); |
08e0e7c8 | 491 | return inode; |
1da177e4 LT |
492 | |
493 | /* failure */ | |
ec26815a | 494 | bad_inode: |
aa7fa240 | 495 | iget_failed(inode); |
1da177e4 | 496 | _leave(" = %d [bad]", ret); |
08e0e7c8 | 497 | return ERR_PTR(ret); |
ec26815a | 498 | } |
1da177e4 | 499 | |
e49c7b2f DH |
500 | static int afs_iget5_set_root(struct inode *inode, void *opaque) |
501 | { | |
502 | struct afs_super_info *as = AFS_FS_S(inode->i_sb); | |
503 | struct afs_vnode *vnode = AFS_FS_I(inode); | |
504 | ||
505 | vnode->volume = as->volume; | |
506 | vnode->fid.vid = as->volume->vid, | |
507 | vnode->fid.vnode = 1; | |
508 | vnode->fid.unique = 1; | |
509 | inode->i_ino = 1; | |
510 | inode->i_generation = 1; | |
511 | return 0; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Set up the root inode for a volume. This is always vnode 1, unique 1 within | |
516 | * the volume. | |
517 | */ | |
518 | struct inode *afs_root_iget(struct super_block *sb, struct key *key) | |
519 | { | |
520 | struct afs_super_info *as = AFS_FS_S(sb); | |
521 | struct afs_operation *op; | |
522 | struct afs_vnode *vnode; | |
523 | struct inode *inode; | |
524 | int ret; | |
525 | ||
526 | _enter(",{%llx},,", as->volume->vid); | |
527 | ||
528 | inode = iget5_locked(sb, 1, NULL, afs_iget5_set_root, NULL); | |
529 | if (!inode) { | |
530 | _leave(" = -ENOMEM"); | |
531 | return ERR_PTR(-ENOMEM); | |
532 | } | |
533 | ||
534 | _debug("GOT ROOT INODE %p { vl=%llx }", inode, as->volume->vid); | |
535 | ||
536 | BUG_ON(!(inode->i_state & I_NEW)); | |
537 | ||
538 | vnode = AFS_FS_I(inode); | |
539 | vnode->cb_v_break = as->volume->cb_v_break, | |
540 | ||
541 | op = afs_alloc_operation(key, as->volume); | |
542 | if (IS_ERR(op)) { | |
543 | ret = PTR_ERR(op); | |
544 | goto error; | |
545 | } | |
546 | ||
547 | afs_op_set_vnode(op, 0, vnode); | |
548 | ||
549 | op->nr_files = 1; | |
550 | op->ops = &afs_fetch_status_operation; | |
551 | ret = afs_do_sync_operation(op); | |
552 | if (ret < 0) | |
553 | goto error; | |
554 | ||
555 | afs_get_inode_cache(vnode); | |
556 | ||
557 | clear_bit(AFS_VNODE_UNSET, &vnode->flags); | |
558 | unlock_new_inode(inode); | |
559 | _leave(" = %p", inode); | |
560 | return inode; | |
561 | ||
562 | error: | |
563 | iget_failed(inode); | |
564 | _leave(" = %d [bad]", ret); | |
565 | return ERR_PTR(ret); | |
566 | } | |
567 | ||
416351f2 DH |
568 | /* |
569 | * mark the data attached to an inode as obsolete due to a write on the server | |
570 | * - might also want to ditch all the outstanding writes and dirty pages | |
571 | */ | |
c68421bb | 572 | static void afs_zap_data(struct afs_vnode *vnode) |
416351f2 | 573 | { |
3b6492df | 574 | _enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode); |
416351f2 | 575 | |
c1515999 DH |
576 | #ifdef CONFIG_AFS_FSCACHE |
577 | fscache_invalidate(vnode->cache); | |
578 | #endif | |
579 | ||
416351f2 | 580 | /* nuke all the non-dirty pages that aren't locked, mapped or being |
0f300ca9 DH |
581 | * written back in a regular file and completely discard the pages in a |
582 | * directory or symlink */ | |
583 | if (S_ISREG(vnode->vfs_inode.i_mode)) | |
584 | invalidate_remote_inode(&vnode->vfs_inode); | |
585 | else | |
586 | invalidate_inode_pages2(vnode->vfs_inode.i_mapping); | |
416351f2 DH |
587 | } |
588 | ||
20325960 DH |
589 | /* |
590 | * Get the server reinit counter for a vnode's current server. | |
591 | */ | |
592 | static bool afs_get_s_break_rcu(struct afs_vnode *vnode, unsigned int *_s_break) | |
593 | { | |
594 | struct afs_server_list *slist = rcu_dereference(vnode->volume->servers); | |
595 | struct afs_server *server; | |
596 | int i; | |
597 | ||
598 | for (i = 0; i < slist->nr_servers; i++) { | |
599 | server = slist->servers[i].server; | |
600 | if (server == vnode->cb_server) { | |
601 | *_s_break = READ_ONCE(server->cb_s_break); | |
602 | return true; | |
603 | } | |
604 | } | |
605 | ||
606 | return false; | |
607 | } | |
608 | ||
260a9803 | 609 | /* |
c925bd0a | 610 | * Check the validity of a vnode/inode. |
260a9803 | 611 | */ |
c925bd0a | 612 | bool afs_check_validity(struct afs_vnode *vnode) |
260a9803 | 613 | { |
f642404a | 614 | struct afs_volume *volume = vnode->volume; |
051d2525 | 615 | enum afs_cb_break_reason need_clear = afs_cb_break_no_break; |
c435ee34 | 616 | time64_t now = ktime_get_real_seconds(); |
051d2525 | 617 | bool valid; |
f642404a DH |
618 | unsigned int cb_break, cb_s_break, cb_v_break; |
619 | int seq = 0; | |
260a9803 | 620 | |
f642404a DH |
621 | do { |
622 | read_seqbegin_or_lock(&vnode->cb_lock, &seq); | |
623 | cb_v_break = READ_ONCE(volume->cb_v_break); | |
624 | cb_break = vnode->cb_break; | |
625 | ||
20325960 DH |
626 | if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags) && |
627 | afs_get_s_break_rcu(vnode, &cb_s_break)) { | |
f642404a DH |
628 | if (vnode->cb_s_break != cb_s_break || |
629 | vnode->cb_v_break != cb_v_break) { | |
630 | vnode->cb_s_break = cb_s_break; | |
631 | vnode->cb_v_break = cb_v_break; | |
051d2525 | 632 | need_clear = afs_cb_break_for_vsbreak; |
f642404a DH |
633 | valid = false; |
634 | } else if (test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) { | |
051d2525 | 635 | need_clear = afs_cb_break_for_zap; |
f642404a DH |
636 | valid = false; |
637 | } else if (vnode->cb_expires_at - 10 <= now) { | |
051d2525 | 638 | need_clear = afs_cb_break_for_lapsed; |
f642404a DH |
639 | valid = false; |
640 | } else { | |
641 | valid = true; | |
642 | } | |
643 | } else if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { | |
68251f0a | 644 | valid = true; |
f642404a DH |
645 | } else { |
646 | vnode->cb_v_break = cb_v_break; | |
647 | valid = false; | |
260a9803 | 648 | } |
260a9803 | 649 | |
f642404a DH |
650 | } while (need_seqretry(&vnode->cb_lock, seq)); |
651 | ||
652 | done_seqretry(&vnode->cb_lock, seq); | |
61c347ba | 653 | |
051d2525 | 654 | if (need_clear != afs_cb_break_no_break) { |
61c347ba DH |
655 | write_seqlock(&vnode->cb_lock); |
656 | if (cb_break == vnode->cb_break) | |
051d2525 DH |
657 | __afs_break_callback(vnode, need_clear); |
658 | else | |
659 | trace_afs_cb_miss(&vnode->fid, need_clear); | |
61c347ba DH |
660 | write_sequnlock(&vnode->cb_lock); |
661 | valid = false; | |
662 | } | |
663 | ||
c925bd0a DH |
664 | return valid; |
665 | } | |
666 | ||
667 | /* | |
668 | * validate a vnode/inode | |
669 | * - there are several things we need to check | |
670 | * - parent dir data changes (rm, rmdir, rename, mkdir, create, link, | |
671 | * symlink) | |
672 | * - parent dir metadata changed (security changes) | |
673 | * - dentry data changed (write, truncate) | |
674 | * - dentry metadata changed (security changes) | |
675 | */ | |
676 | int afs_validate(struct afs_vnode *vnode, struct key *key) | |
677 | { | |
678 | bool valid; | |
679 | int ret; | |
680 | ||
681 | _enter("{v={%llx:%llu} fl=%lx},%x", | |
682 | vnode->fid.vid, vnode->fid.vnode, vnode->flags, | |
683 | key_serial(key)); | |
684 | ||
f642404a | 685 | rcu_read_lock(); |
c925bd0a | 686 | valid = afs_check_validity(vnode); |
f642404a | 687 | rcu_read_unlock(); |
440fbc3a DH |
688 | |
689 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) | |
690 | clear_nlink(&vnode->vfs_inode); | |
691 | ||
c435ee34 | 692 | if (valid) |
260a9803 DH |
693 | goto valid; |
694 | ||
b61f7dcf | 695 | down_write(&vnode->validate_lock); |
260a9803 DH |
696 | |
697 | /* if the promise has expired, we need to check the server again to get | |
698 | * a new promise - note that if the (parent) directory's metadata was | |
699 | * changed then the security may be different and we may no longer have | |
700 | * access */ | |
c435ee34 | 701 | if (!test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) { |
260a9803 | 702 | _debug("not promised"); |
a58823ac | 703 | ret = afs_fetch_status(vnode, key, false, NULL); |
c435ee34 DH |
704 | if (ret < 0) { |
705 | if (ret == -ENOENT) { | |
706 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
707 | ret = -ESTALE; | |
708 | } | |
260a9803 | 709 | goto error_unlock; |
c435ee34 | 710 | } |
260a9803 DH |
711 | _debug("new promise [fl=%lx]", vnode->flags); |
712 | } | |
713 | ||
714 | if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { | |
715 | _debug("file already deleted"); | |
716 | ret = -ESTALE; | |
717 | goto error_unlock; | |
718 | } | |
719 | ||
720 | /* if the vnode's data version number changed then its contents are | |
721 | * different */ | |
416351f2 DH |
722 | if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) |
723 | afs_zap_data(vnode); | |
b61f7dcf | 724 | up_write(&vnode->validate_lock); |
260a9803 DH |
725 | valid: |
726 | _leave(" = 0"); | |
727 | return 0; | |
728 | ||
729 | error_unlock: | |
b61f7dcf | 730 | up_write(&vnode->validate_lock); |
260a9803 DH |
731 | _leave(" = %d", ret); |
732 | return ret; | |
733 | } | |
734 | ||
1da177e4 LT |
735 | /* |
736 | * read the attributes of an inode | |
737 | */ | |
549c7297 CB |
738 | int afs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
739 | struct kstat *stat, u32 request_mask, unsigned int query_flags) | |
1da177e4 | 740 | { |
a528d35e | 741 | struct inode *inode = d_inode(path->dentry); |
c435ee34 DH |
742 | struct afs_vnode *vnode = AFS_FS_I(inode); |
743 | int seq = 0; | |
1da177e4 | 744 | |
d6e43f75 | 745 | _enter("{ ino=%lu v=%u }", inode->i_ino, inode->i_generation); |
1da177e4 | 746 | |
c435ee34 DH |
747 | do { |
748 | read_seqbegin_or_lock(&vnode->cb_lock, &seq); | |
0d56a451 | 749 | generic_fillattr(&init_user_ns, inode, stat); |
b6489a49 DH |
750 | if (test_bit(AFS_VNODE_SILLY_DELETED, &vnode->flags) && |
751 | stat->nlink > 0) | |
752 | stat->nlink -= 1; | |
c435ee34 DH |
753 | } while (need_seqretry(&vnode->cb_lock, seq)); |
754 | ||
755 | done_seqretry(&vnode->cb_lock, seq); | |
1da177e4 | 756 | return 0; |
ec26815a | 757 | } |
1da177e4 | 758 | |
bec5eb61 | 759 | /* |
760 | * discard an AFS inode | |
761 | */ | |
762 | int afs_drop_inode(struct inode *inode) | |
763 | { | |
764 | _enter(""); | |
765 | ||
766 | if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags)) | |
767 | return generic_delete_inode(inode); | |
768 | else | |
769 | return generic_drop_inode(inode); | |
770 | } | |
771 | ||
1da177e4 LT |
772 | /* |
773 | * clear an AFS inode | |
774 | */ | |
b57922d9 | 775 | void afs_evict_inode(struct inode *inode) |
1da177e4 LT |
776 | { |
777 | struct afs_vnode *vnode; | |
778 | ||
779 | vnode = AFS_FS_I(inode); | |
780 | ||
3b6492df | 781 | _enter("{%llx:%llu.%d}", |
260a9803 | 782 | vnode->fid.vid, |
1da177e4 | 783 | vnode->fid.vnode, |
c435ee34 | 784 | vnode->fid.unique); |
1da177e4 | 785 | |
08e0e7c8 DH |
786 | _debug("CLEAR INODE %p", inode); |
787 | ||
788 | ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode); | |
789 | ||
91b0abe3 | 790 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 791 | clear_inode(inode); |
b57922d9 | 792 | |
4343d008 DH |
793 | while (!list_empty(&vnode->wb_keys)) { |
794 | struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next, | |
795 | struct afs_wb_key, vnode_link); | |
796 | list_del(&wbk->vnode_link); | |
797 | afs_put_wb_key(wbk); | |
798 | } | |
1da177e4 | 799 | |
9b3f26c9 | 800 | #ifdef CONFIG_AFS_FSCACHE |
402cb8dd DH |
801 | { |
802 | struct afs_vnode_cache_aux aux; | |
803 | ||
804 | aux.data_version = vnode->status.data_version; | |
805 | fscache_relinquish_cookie(vnode->cache, &aux, | |
806 | test_bit(AFS_VNODE_DELETED, &vnode->flags)); | |
807 | vnode->cache = NULL; | |
808 | } | |
1da177e4 LT |
809 | #endif |
810 | ||
a1b879ee | 811 | afs_prune_wb_keys(vnode); |
fe342cf7 | 812 | afs_put_permits(rcu_access_pointer(vnode->permit_cache)); |
79ddbfa5 DH |
813 | key_put(vnode->silly_key); |
814 | vnode->silly_key = NULL; | |
59d49076 DH |
815 | key_put(vnode->lock_key); |
816 | vnode->lock_key = NULL; | |
1da177e4 | 817 | _leave(""); |
ec26815a | 818 | } |
31143d5d | 819 | |
e49c7b2f DH |
820 | static void afs_setattr_success(struct afs_operation *op) |
821 | { | |
ec0fa0b6 DH |
822 | struct afs_vnode_param *vp = &op->file[0]; |
823 | struct inode *inode = &vp->vnode->vfs_inode; | |
824 | loff_t old_i_size = i_size_read(inode); | |
825 | ||
826 | op->setattr.old_i_size = old_i_size; | |
827 | afs_vnode_commit_status(op, vp); | |
828 | /* inode->i_size has now been changed. */ | |
829 | ||
830 | if (op->setattr.attr->ia_valid & ATTR_SIZE) { | |
831 | loff_t size = op->setattr.attr->ia_size; | |
832 | if (size > old_i_size) | |
833 | pagecache_isize_extended(inode, old_i_size, size); | |
834 | } | |
835 | } | |
836 | ||
837 | static void afs_setattr_edit_file(struct afs_operation *op) | |
838 | { | |
839 | struct afs_vnode_param *vp = &op->file[0]; | |
840 | struct inode *inode = &vp->vnode->vfs_inode; | |
793fe82e | 841 | |
793fe82e | 842 | if (op->setattr.attr->ia_valid & ATTR_SIZE) { |
ec0fa0b6 DH |
843 | loff_t size = op->setattr.attr->ia_size; |
844 | loff_t i_size = op->setattr.old_i_size; | |
845 | ||
846 | if (size < i_size) | |
847 | truncate_pagecache(inode, size); | |
793fe82e | 848 | } |
e49c7b2f DH |
849 | } |
850 | ||
851 | static const struct afs_operation_ops afs_setattr_operation = { | |
852 | .issue_afs_rpc = afs_fs_setattr, | |
853 | .issue_yfs_rpc = yfs_fs_setattr, | |
854 | .success = afs_setattr_success, | |
ec0fa0b6 | 855 | .edit_dir = afs_setattr_edit_file, |
e49c7b2f DH |
856 | }; |
857 | ||
31143d5d DH |
858 | /* |
859 | * set the attributes of an inode | |
860 | */ | |
549c7297 CB |
861 | int afs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, |
862 | struct iattr *attr) | |
31143d5d | 863 | { |
e49c7b2f | 864 | struct afs_operation *op; |
2b0143b5 | 865 | struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry)); |
793fe82e | 866 | int ret; |
31143d5d | 867 | |
3b6492df | 868 | _enter("{%llx:%llu},{n=%pd},%x", |
a455589f | 869 | vnode->fid.vid, vnode->fid.vnode, dentry, |
31143d5d DH |
870 | attr->ia_valid); |
871 | ||
872 | if (!(attr->ia_valid & (ATTR_SIZE | ATTR_MODE | ATTR_UID | ATTR_GID | | |
da8d0755 DH |
873 | ATTR_MTIME | ATTR_MTIME_SET | ATTR_TIMES_SET | |
874 | ATTR_TOUCH))) { | |
31143d5d DH |
875 | _leave(" = 0 [unsupported]"); |
876 | return 0; | |
877 | } | |
878 | ||
793fe82e DH |
879 | if (attr->ia_valid & ATTR_SIZE) { |
880 | if (!S_ISREG(vnode->vfs_inode.i_mode)) | |
881 | return -EISDIR; | |
882 | ||
883 | ret = inode_newsize_ok(&vnode->vfs_inode, attr->ia_size); | |
884 | if (ret) | |
885 | return ret; | |
886 | ||
887 | if (attr->ia_size == i_size_read(&vnode->vfs_inode)) | |
888 | attr->ia_valid &= ~ATTR_SIZE; | |
889 | } | |
890 | ||
31143d5d | 891 | /* flush any dirty data outstanding on a regular file */ |
4343d008 | 892 | if (S_ISREG(vnode->vfs_inode.i_mode)) |
31143d5d | 893 | filemap_write_and_wait(vnode->vfs_inode.i_mapping); |
31143d5d | 894 | |
ec0fa0b6 DH |
895 | /* Prevent any new writebacks from starting whilst we do this. */ |
896 | down_write(&vnode->validate_lock); | |
897 | ||
e49c7b2f DH |
898 | op = afs_alloc_operation(((attr->ia_valid & ATTR_FILE) ? |
899 | afs_file_key(attr->ia_file) : NULL), | |
900 | vnode->volume); | |
ec0fa0b6 DH |
901 | if (IS_ERR(op)) { |
902 | ret = PTR_ERR(op); | |
903 | goto out_unlock; | |
904 | } | |
d2ddc776 | 905 | |
e49c7b2f DH |
906 | afs_op_set_vnode(op, 0, vnode); |
907 | op->setattr.attr = attr; | |
d2ddc776 | 908 | |
793fe82e | 909 | if (attr->ia_valid & ATTR_SIZE) { |
e49c7b2f | 910 | op->file[0].dv_delta = 1; |
793fe82e DH |
911 | op->file[0].set_size = true; |
912 | } | |
da8d0755 DH |
913 | op->ctime = attr->ia_ctime; |
914 | op->file[0].update_ctime = 1; | |
22650f14 | 915 | op->file[0].modification = true; |
31143d5d | 916 | |
e49c7b2f | 917 | op->ops = &afs_setattr_operation; |
ec0fa0b6 DH |
918 | ret = afs_do_sync_operation(op); |
919 | ||
920 | out_unlock: | |
921 | up_write(&vnode->validate_lock); | |
922 | _leave(" = %d", ret); | |
923 | return ret; | |
31143d5d | 924 | } |