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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
e9be9d5e MS |
2 | /* |
3 | * | |
4 | * Copyright (C) 2011 Novell Inc. | |
e9be9d5e MS |
5 | */ |
6 | ||
7 | #include <linux/kernel.h> | |
3a1e819b | 8 | #include <linux/uuid.h> |
46e5d0a3 | 9 | #include <linux/fs.h> |
22f289ce | 10 | #include <linux/namei.h> |
0e641857 CB |
11 | #include <linux/posix_acl.h> |
12 | #include <linux/posix_acl_xattr.h> | |
ee023c30 | 13 | #include "ovl_entry.h" |
e9be9d5e | 14 | |
1bd0a3ae | 15 | #undef pr_fmt |
16 | #define pr_fmt(fmt) "overlayfs: " fmt | |
17 | ||
e9be9d5e | 18 | enum ovl_path_type { |
38e813db MS |
19 | __OVL_PATH_UPPER = (1 << 0), |
20 | __OVL_PATH_MERGE = (1 << 1), | |
59548503 | 21 | __OVL_PATH_ORIGIN = (1 << 2), |
e9be9d5e MS |
22 | }; |
23 | ||
1afaba1e MS |
24 | #define OVL_TYPE_UPPER(type) ((type) & __OVL_PATH_UPPER) |
25 | #define OVL_TYPE_MERGE(type) ((type) & __OVL_PATH_MERGE) | |
59548503 | 26 | #define OVL_TYPE_ORIGIN(type) ((type) & __OVL_PATH_ORIGIN) |
d837a49b | 27 | |
2d2f2d73 MS |
28 | #define OVL_XATTR_NAMESPACE "overlay." |
29 | #define OVL_XATTR_TRUSTED_PREFIX XATTR_TRUSTED_PREFIX OVL_XATTR_NAMESPACE | |
30 | #define OVL_XATTR_USER_PREFIX XATTR_USER_PREFIX OVL_XATTR_NAMESPACE | |
43d193f8 MS |
31 | |
32 | enum ovl_xattr { | |
33 | OVL_XATTR_OPAQUE, | |
34 | OVL_XATTR_REDIRECT, | |
35 | OVL_XATTR_ORIGIN, | |
36 | OVL_XATTR_IMPURE, | |
37 | OVL_XATTR_NLINK, | |
38 | OVL_XATTR_UPPER, | |
39 | OVL_XATTR_METACOPY, | |
096a218a | 40 | OVL_XATTR_PROTATTR, |
43d193f8 | 41 | }; |
3a1e819b | 42 | |
c62520a8 | 43 | enum ovl_inode_flag { |
b79e05aa | 44 | /* Pure upper dir that may contain non pure upper entries */ |
13c72075 | 45 | OVL_IMPURE, |
b79e05aa AG |
46 | /* Non-merge dir that may contain whiteout entries */ |
47 | OVL_WHITEOUTS, | |
359f392c | 48 | OVL_INDEX, |
0c288874 | 49 | OVL_UPPERDATA, |
a00c2d59 VG |
50 | /* Inode number will remain constant over copy up. */ |
51 | OVL_CONST_INO, | |
13c72075 MS |
52 | }; |
53 | ||
c62520a8 AG |
54 | enum ovl_entry_flag { |
55 | OVL_E_UPPER_ALIAS, | |
56 | OVL_E_OPAQUE, | |
2ca3c148 | 57 | OVL_E_CONNECTED, |
c62520a8 AG |
58 | }; |
59 | ||
af5f2396 AG |
60 | enum { |
61 | OVL_REDIRECT_OFF, /* "off" mode is never used. In effect */ | |
62 | OVL_REDIRECT_FOLLOW, /* ...it translates to either "follow" */ | |
63 | OVL_REDIRECT_NOFOLLOW, /* ...or "nofollow". */ | |
64 | OVL_REDIRECT_ON, | |
65 | }; | |
66 | ||
926e94d7 AG |
67 | enum { |
68 | OVL_XINO_OFF, | |
69 | OVL_XINO_AUTO, | |
70 | OVL_XINO_ON, | |
71 | }; | |
72 | ||
ac519625 AG |
73 | /* The set of options that user requested explicitly via mount options */ |
74 | struct ovl_opt_set { | |
75 | bool metacopy; | |
76 | bool redirect; | |
77 | bool nfs_export; | |
78 | bool index; | |
79 | }; | |
80 | ||
3a1e819b AG |
81 | /* |
82 | * The tuple (fh,uuid) is a universal unique identifier for a copy up origin, | |
83 | * where: | |
84 | * origin.fh - exported file handle of the lower file | |
85 | * origin.uuid - uuid of the lower filesystem | |
86 | */ | |
87 | #define OVL_FH_VERSION 0 | |
88 | #define OVL_FH_MAGIC 0xfb | |
89 | ||
90 | /* CPU byte order required for fid decoding: */ | |
91 | #define OVL_FH_FLAG_BIG_ENDIAN (1 << 0) | |
92 | #define OVL_FH_FLAG_ANY_ENDIAN (1 << 1) | |
54fb347e AG |
93 | /* Is the real inode encoded in fid an upper inode? */ |
94 | #define OVL_FH_FLAG_PATH_UPPER (1 << 2) | |
3a1e819b | 95 | |
961af647 AG |
96 | #define OVL_FH_FLAG_ALL (OVL_FH_FLAG_BIG_ENDIAN | OVL_FH_FLAG_ANY_ENDIAN | \ |
97 | OVL_FH_FLAG_PATH_UPPER) | |
3a1e819b AG |
98 | |
99 | #if defined(__LITTLE_ENDIAN) | |
100 | #define OVL_FH_FLAG_CPU_ENDIAN 0 | |
101 | #elif defined(__BIG_ENDIAN) | |
102 | #define OVL_FH_FLAG_CPU_ENDIAN OVL_FH_FLAG_BIG_ENDIAN | |
103 | #else | |
104 | #error Endianness not defined | |
105 | #endif | |
106 | ||
cbe7fba8 AG |
107 | /* The type used to be returned by overlay exportfs for misaligned fid */ |
108 | #define OVL_FILEID_V0 0xfb | |
109 | /* The type returned by overlay exportfs for 32bit aligned fid */ | |
110 | #define OVL_FILEID_V1 0xf8 | |
8ed5eec9 | 111 | |
cbe7fba8 AG |
112 | /* On-disk format for "origin" file handle */ |
113 | struct ovl_fb { | |
3a1e819b AG |
114 | u8 version; /* 0 */ |
115 | u8 magic; /* 0xfb */ | |
116 | u8 len; /* size of this header + size of fid */ | |
117 | u8 flags; /* OVL_FH_FLAG_* */ | |
118 | u8 type; /* fid_type of fid */ | |
01633fd2 | 119 | uuid_t uuid; /* uuid of filesystem */ |
0efbe7c4 | 120 | u32 fid[]; /* file identifier should be 32bit aligned in-memory */ |
3a1e819b | 121 | } __packed; |
e9be9d5e | 122 | |
cbe7fba8 AG |
123 | /* In-memory and on-wire format for overlay file handle */ |
124 | struct ovl_fh { | |
125 | u8 padding[3]; /* make sure fb.fid is 32bit aligned */ | |
126 | union { | |
127 | struct ovl_fb fb; | |
cf8aa9bf | 128 | DECLARE_FLEX_ARRAY(u8, buf); |
cbe7fba8 AG |
129 | }; |
130 | } __packed; | |
131 | ||
132 | #define OVL_FH_WIRE_OFFSET offsetof(struct ovl_fh, fb) | |
133 | #define OVL_FH_LEN(fh) (OVL_FH_WIRE_OFFSET + (fh)->fb.len) | |
134 | #define OVL_FH_FID_OFFSET (OVL_FH_WIRE_OFFSET + \ | |
135 | offsetof(struct ovl_fb, fid)) | |
136 | ||
2d2f2d73 | 137 | extern const char *const ovl_xattr_table[][2]; |
43d193f8 MS |
138 | static inline const char *ovl_xattr(struct ovl_fs *ofs, enum ovl_xattr ox) |
139 | { | |
2d2f2d73 | 140 | return ovl_xattr_table[ox][ofs->config.userxattr]; |
43d193f8 MS |
141 | } |
142 | ||
a15506ea CB |
143 | /* |
144 | * When changing ownership of an upper object map the intended ownership | |
145 | * according to the upper layer's idmapping. When an upper mount idmaps files | |
146 | * that are stored on-disk as owned by id 1001 to id 1000 this means stat on | |
147 | * this object will report it as being owned by id 1000 when calling stat via | |
148 | * the upper mount. | |
149 | * In order to change ownership of an object so stat reports id 1000 when | |
150 | * called on an idmapped upper mount the value written to disk - i.e., the | |
151 | * value stored in ia_*id - must 1001. The mount mapping helper will thus take | |
152 | * care to map 1000 to 1001. | |
153 | * The mnt idmapping helpers are nops if the upper layer isn't idmapped. | |
154 | */ | |
155 | static inline int ovl_do_notify_change(struct ovl_fs *ofs, | |
156 | struct dentry *upperdentry, | |
157 | struct iattr *attr) | |
158 | { | |
abf08576 | 159 | return notify_change(ovl_upper_mnt_idmap(ofs), upperdentry, attr, NULL); |
a15506ea CB |
160 | } |
161 | ||
576bb263 CB |
162 | static inline int ovl_do_rmdir(struct ovl_fs *ofs, |
163 | struct inode *dir, struct dentry *dentry) | |
e9be9d5e | 164 | { |
abf08576 | 165 | int err = vfs_rmdir(ovl_upper_mnt_idmap(ofs), dir, dentry); |
6cf00764 | 166 | |
e9be9d5e MS |
167 | pr_debug("rmdir(%pd2) = %i\n", dentry, err); |
168 | return err; | |
169 | } | |
170 | ||
576bb263 CB |
171 | static inline int ovl_do_unlink(struct ovl_fs *ofs, struct inode *dir, |
172 | struct dentry *dentry) | |
e9be9d5e | 173 | { |
abf08576 | 174 | int err = vfs_unlink(ovl_upper_mnt_idmap(ofs), dir, dentry, NULL); |
6cf00764 | 175 | |
e9be9d5e MS |
176 | pr_debug("unlink(%pd2) = %i\n", dentry, err); |
177 | return err; | |
178 | } | |
179 | ||
576bb263 CB |
180 | static inline int ovl_do_link(struct ovl_fs *ofs, struct dentry *old_dentry, |
181 | struct inode *dir, struct dentry *new_dentry) | |
e9be9d5e | 182 | { |
abf08576 CB |
183 | int err = vfs_link(old_dentry, ovl_upper_mnt_idmap(ofs), dir, |
184 | new_dentry, NULL); | |
6cf00764 AG |
185 | |
186 | pr_debug("link(%pd2, %pd2) = %i\n", old_dentry, new_dentry, err); | |
e9be9d5e MS |
187 | return err; |
188 | } | |
189 | ||
576bb263 CB |
190 | static inline int ovl_do_create(struct ovl_fs *ofs, |
191 | struct inode *dir, struct dentry *dentry, | |
6cf00764 | 192 | umode_t mode) |
e9be9d5e | 193 | { |
abf08576 | 194 | int err = vfs_create(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, true); |
6cf00764 AG |
195 | |
196 | pr_debug("create(%pd2, 0%o) = %i\n", dentry, mode, err); | |
e9be9d5e MS |
197 | return err; |
198 | } | |
199 | ||
576bb263 CB |
200 | static inline int ovl_do_mkdir(struct ovl_fs *ofs, |
201 | struct inode *dir, struct dentry *dentry, | |
6cf00764 | 202 | umode_t mode) |
e9be9d5e | 203 | { |
abf08576 | 204 | int err = vfs_mkdir(ovl_upper_mnt_idmap(ofs), dir, dentry, mode); |
6cf00764 | 205 | pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, err); |
e9be9d5e MS |
206 | return err; |
207 | } | |
208 | ||
576bb263 CB |
209 | static inline int ovl_do_mknod(struct ovl_fs *ofs, |
210 | struct inode *dir, struct dentry *dentry, | |
6cf00764 | 211 | umode_t mode, dev_t dev) |
e9be9d5e | 212 | { |
abf08576 | 213 | int err = vfs_mknod(ovl_upper_mnt_idmap(ofs), dir, dentry, mode, dev); |
6cf00764 AG |
214 | |
215 | pr_debug("mknod(%pd2, 0%o, 0%o) = %i\n", dentry, mode, dev, err); | |
e9be9d5e MS |
216 | return err; |
217 | } | |
218 | ||
576bb263 CB |
219 | static inline int ovl_do_symlink(struct ovl_fs *ofs, |
220 | struct inode *dir, struct dentry *dentry, | |
6cf00764 | 221 | const char *oldname) |
e9be9d5e | 222 | { |
abf08576 | 223 | int err = vfs_symlink(ovl_upper_mnt_idmap(ofs), dir, dentry, oldname); |
6cf00764 AG |
224 | |
225 | pr_debug("symlink(\"%s\", %pd2) = %i\n", oldname, dentry, err); | |
e9be9d5e MS |
226 | return err; |
227 | } | |
228 | ||
2d343087 | 229 | static inline ssize_t ovl_do_getxattr(const struct path *path, const char *name, |
dad7017a | 230 | void *value, size_t size) |
d5dc7486 | 231 | { |
dad7017a CB |
232 | int err, len; |
233 | ||
234 | WARN_ON(path->dentry->d_sb != path->mnt->mnt_sb); | |
235 | ||
4609e1f1 | 236 | err = vfs_getxattr(mnt_idmap(path->mnt), path->dentry, |
dad7017a CB |
237 | name, value, size); |
238 | len = (value && err > 0) ? err : 0; | |
5e717c6f AG |
239 | |
240 | pr_debug("getxattr(%pd2, \"%s\", \"%*pE\", %zu, 0) = %i\n", | |
dad7017a | 241 | path->dentry, name, min(len, 48), value, size, err); |
5e717c6f | 242 | return err; |
d5dc7486 MS |
243 | } |
244 | ||
dad7017a CB |
245 | static inline ssize_t ovl_getxattr_upper(struct ovl_fs *ofs, |
246 | struct dentry *upperdentry, | |
247 | enum ovl_xattr ox, void *value, | |
248 | size_t size) | |
249 | { | |
250 | struct path upperpath = { | |
251 | .dentry = upperdentry, | |
252 | .mnt = ovl_upper_mnt(ofs), | |
253 | }; | |
254 | ||
255 | return ovl_do_getxattr(&upperpath, ovl_xattr(ofs, ox), value, size); | |
256 | } | |
257 | ||
258 | static inline ssize_t ovl_path_getxattr(struct ovl_fs *ofs, | |
2d343087 | 259 | const struct path *path, |
dad7017a CB |
260 | enum ovl_xattr ox, void *value, |
261 | size_t size) | |
c914c0e2 | 262 | { |
dad7017a | 263 | return ovl_do_getxattr(path, ovl_xattr(ofs, ox), value, size); |
c914c0e2 AG |
264 | } |
265 | ||
610afc0b | 266 | static inline int ovl_do_setxattr(struct ovl_fs *ofs, struct dentry *dentry, |
c914c0e2 AG |
267 | const char *name, const void *value, |
268 | size_t size, int flags) | |
e9be9d5e | 269 | { |
4609e1f1 | 270 | int err = vfs_setxattr(ovl_upper_mnt_idmap(ofs), dentry, name, |
6344e669 | 271 | value, size, flags); |
c914c0e2 AG |
272 | |
273 | pr_debug("setxattr(%pd2, \"%s\", \"%*pE\", %zu, %d) = %i\n", | |
274 | dentry, name, min((int)size, 48), value, size, flags, err); | |
e9be9d5e MS |
275 | return err; |
276 | } | |
277 | ||
c914c0e2 AG |
278 | static inline int ovl_setxattr(struct ovl_fs *ofs, struct dentry *dentry, |
279 | enum ovl_xattr ox, const void *value, | |
280 | size_t size) | |
281 | { | |
282 | return ovl_do_setxattr(ofs, dentry, ovl_xattr(ofs, ox), value, size, 0); | |
283 | } | |
284 | ||
610afc0b | 285 | static inline int ovl_do_removexattr(struct ovl_fs *ofs, struct dentry *dentry, |
c914c0e2 | 286 | const char *name) |
e9be9d5e | 287 | { |
4609e1f1 | 288 | int err = vfs_removexattr(ovl_upper_mnt_idmap(ofs), dentry, name); |
e9be9d5e MS |
289 | pr_debug("removexattr(%pd2, \"%s\") = %i\n", dentry, name, err); |
290 | return err; | |
291 | } | |
292 | ||
c914c0e2 AG |
293 | static inline int ovl_removexattr(struct ovl_fs *ofs, struct dentry *dentry, |
294 | enum ovl_xattr ox) | |
295 | { | |
296 | return ovl_do_removexattr(ofs, dentry, ovl_xattr(ofs, ox)); | |
297 | } | |
298 | ||
0e641857 CB |
299 | static inline int ovl_do_set_acl(struct ovl_fs *ofs, struct dentry *dentry, |
300 | const char *acl_name, struct posix_acl *acl) | |
301 | { | |
13e83a49 | 302 | return vfs_set_acl(ovl_upper_mnt_idmap(ofs), dentry, acl_name, acl); |
0e641857 CB |
303 | } |
304 | ||
305 | static inline int ovl_do_remove_acl(struct ovl_fs *ofs, struct dentry *dentry, | |
306 | const char *acl_name) | |
307 | { | |
13e83a49 | 308 | return vfs_remove_acl(ovl_upper_mnt_idmap(ofs), dentry, acl_name); |
0e641857 CB |
309 | } |
310 | ||
576bb263 CB |
311 | static inline int ovl_do_rename(struct ovl_fs *ofs, struct inode *olddir, |
312 | struct dentry *olddentry, struct inode *newdir, | |
313 | struct dentry *newdentry, unsigned int flags) | |
e9be9d5e MS |
314 | { |
315 | int err; | |
9fe61450 | 316 | struct renamedata rd = { |
abf08576 | 317 | .old_mnt_idmap = ovl_upper_mnt_idmap(ofs), |
9fe61450 CB |
318 | .old_dir = olddir, |
319 | .old_dentry = olddentry, | |
abf08576 | 320 | .new_mnt_idmap = ovl_upper_mnt_idmap(ofs), |
9fe61450 CB |
321 | .new_dir = newdir, |
322 | .new_dentry = newdentry, | |
323 | .flags = flags, | |
324 | }; | |
e9be9d5e | 325 | |
6cf00764 | 326 | pr_debug("rename(%pd2, %pd2, 0x%x)\n", olddentry, newdentry, flags); |
9fe61450 | 327 | err = vfs_rename(&rd); |
e9be9d5e | 328 | if (err) { |
2773bf00 | 329 | pr_debug("...rename(%pd2, %pd2, ...) = %i\n", |
e9be9d5e MS |
330 | olddentry, newdentry, err); |
331 | } | |
332 | return err; | |
333 | } | |
334 | ||
576bb263 CB |
335 | static inline int ovl_do_whiteout(struct ovl_fs *ofs, |
336 | struct inode *dir, struct dentry *dentry) | |
e9be9d5e | 337 | { |
abf08576 | 338 | int err = vfs_whiteout(ovl_upper_mnt_idmap(ofs), dir, dentry); |
e9be9d5e MS |
339 | pr_debug("whiteout(%pd2) = %i\n", dentry, err); |
340 | return err; | |
341 | } | |
342 | ||
2b1a7746 MS |
343 | static inline struct file *ovl_do_tmpfile(struct ovl_fs *ofs, |
344 | struct dentry *dentry, umode_t mode) | |
e7f52429 | 345 | { |
2b1a7746 | 346 | struct path path = { .mnt = ovl_upper_mnt(ofs), .dentry = dentry }; |
abf08576 | 347 | struct file *file = vfs_tmpfile_open(ovl_upper_mnt_idmap(ofs), &path, mode, |
2b1a7746 MS |
348 | O_LARGEFILE | O_WRONLY, current_cred()); |
349 | int err = PTR_ERR_OR_ZERO(file); | |
e7f52429 AG |
350 | |
351 | pr_debug("tmpfile(%pd2, 0%o) = %i\n", dentry, mode, err); | |
2b1a7746 | 352 | return file; |
e7f52429 AG |
353 | } |
354 | ||
22f289ce CB |
355 | static inline struct dentry *ovl_lookup_upper(struct ovl_fs *ofs, |
356 | const char *name, | |
357 | struct dentry *base, int len) | |
358 | { | |
4609e1f1 | 359 | return lookup_one(ovl_upper_mnt_idmap(ofs), name, base, len); |
22f289ce CB |
360 | } |
361 | ||
0c288874 VG |
362 | static inline bool ovl_open_flags_need_copy_up(int flags) |
363 | { | |
364 | if (!flags) | |
365 | return false; | |
366 | ||
367 | return ((OPEN_FMODE(flags) & FMODE_WRITE) || (flags & O_TRUNC)); | |
368 | } | |
369 | ||
ca45275c | 370 | |
b36a5780 CB |
371 | /* params.c */ |
372 | #define OVL_MAX_STACK 500 | |
373 | ||
374 | struct ovl_fs_context_layer { | |
375 | char *name; | |
376 | struct path path; | |
377 | }; | |
378 | ||
379 | struct ovl_fs_context { | |
380 | struct path upper; | |
381 | struct path work; | |
382 | size_t capacity; | |
383 | size_t nr; /* includes nr_data */ | |
384 | size_t nr_data; | |
385 | struct ovl_opt_set set; | |
386 | struct ovl_fs_context_layer *lower; | |
387 | }; | |
388 | ||
389 | int ovl_parse_param_upperdir(const char *name, struct fs_context *fc, | |
390 | bool workdir); | |
391 | int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc); | |
392 | void ovl_parse_param_drop_lowerdir(struct ovl_fs_context *ctx); | |
393 | ||
bbb1e54d MS |
394 | /* util.c */ |
395 | int ovl_want_write(struct dentry *dentry); | |
396 | void ovl_drop_write(struct dentry *dentry); | |
397 | struct dentry *ovl_workdir(struct dentry *dentry); | |
398 | const struct cred *ovl_override_creds(struct super_block *sb); | |
e487d889 | 399 | int ovl_can_decode_fh(struct super_block *sb); |
02bcd157 | 400 | struct dentry *ovl_indexdir(struct super_block *sb); |
f168f109 AG |
401 | bool ovl_index_all(struct super_block *sb); |
402 | bool ovl_verify_lower(struct super_block *sb); | |
163db0da AG |
403 | struct ovl_path *ovl_stack_alloc(unsigned int n); |
404 | void ovl_stack_cpy(struct ovl_path *dst, struct ovl_path *src, unsigned int n); | |
405 | void ovl_stack_put(struct ovl_path *stack, unsigned int n); | |
406 | void ovl_stack_free(struct ovl_path *stack, unsigned int n); | |
bbb1e54d | 407 | struct ovl_entry *ovl_alloc_entry(unsigned int numlower); |
163db0da | 408 | void ovl_free_entry(struct ovl_entry *oe); |
bbb1e54d | 409 | bool ovl_dentry_remote(struct dentry *dentry); |
b07d5cc9 | 410 | void ovl_dentry_update_reval(struct dentry *dentry, struct dentry *realdentry); |
0af950f5 AG |
411 | void ovl_dentry_init_reval(struct dentry *dentry, struct dentry *upperdentry, |
412 | struct ovl_entry *oe); | |
b07d5cc9 | 413 | void ovl_dentry_init_flags(struct dentry *dentry, struct dentry *upperdentry, |
0af950f5 | 414 | struct ovl_entry *oe, unsigned int mask); |
bbb1e54d | 415 | bool ovl_dentry_weird(struct dentry *dentry); |
e9be9d5e | 416 | enum ovl_path_type ovl_path_type(struct dentry *dentry); |
e9be9d5e MS |
417 | void ovl_path_upper(struct dentry *dentry, struct path *path); |
418 | void ovl_path_lower(struct dentry *dentry, struct path *path); | |
4f93b426 | 419 | void ovl_path_lowerdata(struct dentry *dentry, struct path *path); |
b2dd05f1 | 420 | struct inode *ovl_i_path_real(struct inode *inode, struct path *path); |
e9be9d5e | 421 | enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path); |
1248ea4b | 422 | enum ovl_path_type ovl_path_realdata(struct dentry *dentry, struct path *path); |
e9be9d5e MS |
423 | struct dentry *ovl_dentry_upper(struct dentry *dentry); |
424 | struct dentry *ovl_dentry_lower(struct dentry *dentry); | |
647d253f | 425 | struct dentry *ovl_dentry_lowerdata(struct dentry *dentry); |
42dd69ae | 426 | int ovl_dentry_set_lowerdata(struct dentry *dentry, struct ovl_path *datapath); |
ffa5723c | 427 | const struct ovl_layer *ovl_i_layer_lower(struct inode *inode); |
13464165 | 428 | const struct ovl_layer *ovl_layer_lower(struct dentry *dentry); |
e9be9d5e | 429 | struct dentry *ovl_dentry_real(struct dentry *dentry); |
1d88f183 | 430 | struct dentry *ovl_i_dentry_upper(struct inode *inode); |
09d8b586 MS |
431 | struct inode *ovl_inode_upper(struct inode *inode); |
432 | struct inode *ovl_inode_lower(struct inode *inode); | |
2664bd08 | 433 | struct inode *ovl_inode_lowerdata(struct inode *inode); |
09d8b586 | 434 | struct inode *ovl_inode_real(struct inode *inode); |
4823d49c | 435 | struct inode *ovl_inode_realdata(struct inode *inode); |
2b21da92 | 436 | const char *ovl_lowerdata_redirect(struct inode *inode); |
4edb83bb MS |
437 | struct ovl_dir_cache *ovl_dir_cache(struct inode *inode); |
438 | void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache); | |
c62520a8 AG |
439 | void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry); |
440 | void ovl_dentry_clear_flag(unsigned long flag, struct dentry *dentry); | |
441 | bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry); | |
e9be9d5e | 442 | bool ovl_dentry_is_opaque(struct dentry *dentry); |
c412ce49 | 443 | bool ovl_dentry_is_whiteout(struct dentry *dentry); |
5cf5b477 | 444 | void ovl_dentry_set_opaque(struct dentry *dentry); |
55acc661 MS |
445 | bool ovl_dentry_has_upper_alias(struct dentry *dentry); |
446 | void ovl_dentry_set_upper_alias(struct dentry *dentry); | |
0c288874 VG |
447 | bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags); |
448 | bool ovl_dentry_needs_data_copy_up_locked(struct dentry *dentry, int flags); | |
449 | bool ovl_has_upperdata(struct inode *inode); | |
450 | void ovl_set_upperdata(struct inode *inode); | |
a6c60655 MS |
451 | const char *ovl_dentry_get_redirect(struct dentry *dentry); |
452 | void ovl_dentry_set_redirect(struct dentry *dentry, const char *redirect); | |
09d8b586 | 453 | void ovl_inode_update(struct inode *inode, struct dentry *upperdentry); |
d9854c87 | 454 | void ovl_dir_modified(struct dentry *dentry, bool impurity); |
1fa9c5c5 | 455 | u64 ovl_inode_version_get(struct inode *inode); |
bbb1e54d | 456 | bool ovl_is_whiteout(struct dentry *dentry); |
2d343087 | 457 | struct file *ovl_path_open(const struct path *path, int flags); |
0c288874 | 458 | int ovl_copy_up_start(struct dentry *dentry, int flags); |
39d3d60a | 459 | void ovl_copy_up_end(struct dentry *dentry); |
0c288874 | 460 | bool ovl_already_copied_up(struct dentry *dentry, int flags); |
2d343087 | 461 | bool ovl_path_check_dir_xattr(struct ovl_fs *ofs, const struct path *path, |
dad7017a | 462 | enum ovl_xattr ox); |
2d343087 | 463 | bool ovl_path_check_origin_xattr(struct ovl_fs *ofs, const struct path *path); |
dad7017a CB |
464 | |
465 | static inline bool ovl_check_origin_xattr(struct ovl_fs *ofs, | |
466 | struct dentry *upperdentry) | |
467 | { | |
468 | struct path upperpath = { | |
469 | .dentry = upperdentry, | |
470 | .mnt = ovl_upper_mnt(ofs), | |
471 | }; | |
472 | return ovl_path_check_origin_xattr(ofs, &upperpath); | |
473 | } | |
474 | ||
a0c236b1 | 475 | int ovl_check_setxattr(struct ovl_fs *ofs, struct dentry *upperdentry, |
43d193f8 | 476 | enum ovl_xattr ox, const void *value, size_t size, |
f3a15685 AG |
477 | int xerr); |
478 | int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry); | |
ad0af710 AG |
479 | bool ovl_inuse_trylock(struct dentry *dentry); |
480 | void ovl_inuse_unlock(struct dentry *dentry); | |
146d62e5 | 481 | bool ovl_is_inuse(struct dentry *dentry); |
24b33ee1 | 482 | bool ovl_need_index(struct dentry *dentry); |
0e32992f AG |
483 | int ovl_nlink_start(struct dentry *dentry); |
484 | void ovl_nlink_end(struct dentry *dentry); | |
5820dc08 | 485 | int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir); |
2d343087 | 486 | int ovl_check_metacopy_xattr(struct ovl_fs *ofs, const struct path *path); |
67d756c2 | 487 | bool ovl_is_metacopy_dentry(struct dentry *dentry); |
2d343087 | 488 | char *ovl_get_redirect_xattr(struct ovl_fs *ofs, const struct path *path, int padding); |
335d3fc5 | 489 | int ovl_sync_status(struct ovl_fs *ofs); |
f3a15685 | 490 | |
65cd913e AG |
491 | static inline void ovl_set_flag(unsigned long flag, struct inode *inode) |
492 | { | |
493 | set_bit(flag, &OVL_I(inode)->flags); | |
494 | } | |
495 | ||
496 | static inline void ovl_clear_flag(unsigned long flag, struct inode *inode) | |
497 | { | |
498 | clear_bit(flag, &OVL_I(inode)->flags); | |
499 | } | |
500 | ||
501 | static inline bool ovl_test_flag(unsigned long flag, struct inode *inode) | |
502 | { | |
503 | return test_bit(flag, &OVL_I(inode)->flags); | |
504 | } | |
505 | ||
610afc0b | 506 | static inline bool ovl_is_impuredir(struct super_block *sb, |
dad7017a | 507 | struct dentry *upperdentry) |
f3a15685 | 508 | { |
dad7017a CB |
509 | struct ovl_fs *ofs = OVL_FS(sb); |
510 | struct path upperpath = { | |
511 | .dentry = upperdentry, | |
512 | .mnt = ovl_upper_mnt(ofs), | |
513 | }; | |
514 | ||
515 | return ovl_path_check_dir_xattr(ofs, &upperpath, OVL_XATTR_IMPURE); | |
f3a15685 AG |
516 | } |
517 | ||
af5f2396 AG |
518 | static inline bool ovl_redirect_follow(struct ovl_fs *ofs) |
519 | { | |
520 | return ofs->config.redirect_mode != OVL_REDIRECT_NOFOLLOW; | |
521 | } | |
522 | ||
523 | static inline bool ovl_redirect_dir(struct ovl_fs *ofs) | |
524 | { | |
525 | return ofs->config.redirect_mode == OVL_REDIRECT_ON; | |
526 | } | |
527 | ||
926e94d7 AG |
528 | /* |
529 | * With xino=auto, we do best effort to keep all inodes on same st_dev and | |
530 | * d_ino consistent with st_ino. | |
531 | * With xino=on, we do the same effort but we warn if we failed. | |
532 | */ | |
dcb399de | 533 | static inline bool ovl_xino_warn(struct ovl_fs *ofs) |
926e94d7 | 534 | { |
dcb399de | 535 | return ofs->config.xino == OVL_XINO_ON; |
926e94d7 AG |
536 | } |
537 | ||
af5f2396 AG |
538 | /* |
539 | * To avoid regressions in existing setups with overlay lower offline changes, | |
540 | * we allow lower changes only if none of the new features are used. | |
541 | */ | |
542 | static inline bool ovl_allow_offline_changes(struct ovl_fs *ofs) | |
543 | { | |
544 | return (!ofs->config.index && !ofs->config.metacopy && | |
545 | !ovl_redirect_dir(ofs) && !ovl_xino_warn(ofs)); | |
546 | } | |
547 | ||
0f831ec8 | 548 | /* All layers on same fs? */ |
dcb399de | 549 | static inline bool ovl_same_fs(struct ovl_fs *ofs) |
e487d889 | 550 | { |
dcb399de | 551 | return ofs->xino_mode == 0; |
0f831ec8 | 552 | } |
e487d889 | 553 | |
0f831ec8 | 554 | /* All overlay inodes have same st_dev? */ |
dcb399de | 555 | static inline bool ovl_same_dev(struct ovl_fs *ofs) |
0f831ec8 | 556 | { |
dcb399de | 557 | return ofs->xino_mode >= 0; |
0f831ec8 AG |
558 | } |
559 | ||
dcb399de | 560 | static inline unsigned int ovl_xino_bits(struct ovl_fs *ofs) |
0f831ec8 | 561 | { |
dcb399de | 562 | return ovl_same_dev(ofs) ? ofs->xino_mode : 0; |
e487d889 AG |
563 | } |
564 | ||
531d3040 AG |
565 | static inline void ovl_inode_lock(struct inode *inode) |
566 | { | |
567 | mutex_lock(&OVL_I(inode)->lock); | |
568 | } | |
569 | ||
570 | static inline int ovl_inode_lock_interruptible(struct inode *inode) | |
1e92e307 AG |
571 | { |
572 | return mutex_lock_interruptible(&OVL_I(inode)->lock); | |
573 | } | |
574 | ||
575 | static inline void ovl_inode_unlock(struct inode *inode) | |
576 | { | |
577 | mutex_unlock(&OVL_I(inode)->lock); | |
578 | } | |
579 | ||
e9be9d5e | 580 | |
bbb1e54d | 581 | /* namei.c */ |
cbe7fba8 AG |
582 | int ovl_check_fb_len(struct ovl_fb *fb, int fb_len); |
583 | ||
584 | static inline int ovl_check_fh_len(struct ovl_fh *fh, int fh_len) | |
585 | { | |
522f6e6c AG |
586 | if (fh_len < sizeof(struct ovl_fh)) |
587 | return -EINVAL; | |
588 | ||
cbe7fba8 AG |
589 | return ovl_check_fb_len(&fh->fb, fh_len - OVL_FH_WIRE_OFFSET); |
590 | } | |
591 | ||
1cdb0cb6 PT |
592 | struct dentry *ovl_decode_real_fh(struct ovl_fs *ofs, struct ovl_fh *fh, |
593 | struct vfsmount *mnt, bool connected); | |
8a22efa1 | 594 | int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected, |
f941866f | 595 | struct dentry *upperdentry, struct ovl_path **stackp); |
610afc0b | 596 | int ovl_verify_set_fh(struct ovl_fs *ofs, struct dentry *dentry, |
43d193f8 | 597 | enum ovl_xattr ox, struct dentry *real, bool is_upper, |
610afc0b | 598 | bool set); |
8ea28765 AG |
599 | struct dentry *ovl_index_upper(struct ovl_fs *ofs, struct dentry *index, |
600 | bool connected); | |
1eff1a1d | 601 | int ovl_verify_index(struct ovl_fs *ofs, struct dentry *index); |
1cdb0cb6 PT |
602 | int ovl_get_index_name(struct ovl_fs *ofs, struct dentry *origin, |
603 | struct qstr *name); | |
91ffe7be | 604 | struct dentry *ovl_get_index_fh(struct ovl_fs *ofs, struct ovl_fh *fh); |
06170154 AG |
605 | struct dentry *ovl_lookup_index(struct ovl_fs *ofs, struct dentry *upper, |
606 | struct dentry *origin, bool verify); | |
bbb1e54d | 607 | int ovl_path_next(int idx, struct dentry *dentry, struct path *path); |
42dd69ae | 608 | int ovl_maybe_lookup_lowerdata(struct dentry *dentry); |
1eff1a1d AG |
609 | struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, |
610 | unsigned int flags); | |
bbb1e54d | 611 | bool ovl_lower_positive(struct dentry *dentry); |
e9be9d5e | 612 | |
610afc0b | 613 | static inline int ovl_verify_origin(struct ovl_fs *ofs, struct dentry *upper, |
05122443 AG |
614 | struct dentry *origin, bool set) |
615 | { | |
610afc0b MS |
616 | return ovl_verify_set_fh(ofs, upper, OVL_XATTR_ORIGIN, origin, |
617 | false, set); | |
05122443 AG |
618 | } |
619 | ||
610afc0b MS |
620 | static inline int ovl_verify_upper(struct ovl_fs *ofs, struct dentry *index, |
621 | struct dentry *upper, bool set) | |
ad1d615c | 622 | { |
610afc0b | 623 | return ovl_verify_set_fh(ofs, index, OVL_XATTR_UPPER, upper, true, set); |
ad1d615c AG |
624 | } |
625 | ||
e9be9d5e MS |
626 | /* readdir.c */ |
627 | extern const struct file_operations ovl_dir_operations; | |
61536bed | 628 | struct file *ovl_dir_real_file(const struct file *file, bool want_upper); |
e9be9d5e | 629 | int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list); |
576bb263 CB |
630 | void ovl_cleanup_whiteouts(struct ovl_fs *ofs, struct dentry *upper, |
631 | struct list_head *list); | |
e9be9d5e | 632 | void ovl_cache_free(struct list_head *list); |
4edb83bb | 633 | void ovl_dir_cache_free(struct inode *inode); |
2d343087 | 634 | int ovl_check_d_type_supported(const struct path *realpath); |
576bb263 CB |
635 | int ovl_workdir_cleanup(struct ovl_fs *ofs, struct inode *dir, |
636 | struct vfsmount *mnt, struct dentry *dentry, int level); | |
1eff1a1d | 637 | int ovl_indexdir_cleanup(struct ovl_fs *ofs); |
e9be9d5e | 638 | |
65cd913e AG |
639 | /* |
640 | * Can we iterate real dir directly? | |
641 | * | |
642 | * Non-merge dir may contain whiteouts from a time it was a merge upper, before | |
643 | * lower dir was removed under it and possibly before it was rotated from upper | |
644 | * to lower layer. | |
645 | */ | |
1fa9c5c5 | 646 | static inline bool ovl_dir_is_real(struct inode *dir) |
65cd913e | 647 | { |
1fa9c5c5 | 648 | return !ovl_test_flag(OVL_WHITEOUTS, dir); |
65cd913e AG |
649 | } |
650 | ||
e9be9d5e | 651 | /* inode.c */ |
5f8415d6 AG |
652 | int ovl_set_nlink_upper(struct dentry *dentry); |
653 | int ovl_set_nlink_lower(struct dentry *dentry); | |
610afc0b | 654 | unsigned int ovl_get_nlink(struct ovl_fs *ofs, struct dentry *lowerdentry, |
caf70cb2 AG |
655 | struct dentry *upperdentry, |
656 | unsigned int fallback); | |
c1632a0f | 657 | int ovl_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 658 | struct iattr *attr); |
b74d24f7 | 659 | int ovl_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 660 | struct kstat *stat, u32 request_mask, unsigned int flags); |
4609e1f1 | 661 | int ovl_permission(struct mnt_idmap *idmap, struct inode *inode, |
549c7297 | 662 | int mask); |
1d88f183 MS |
663 | int ovl_xattr_set(struct dentry *dentry, struct inode *inode, const char *name, |
664 | const void *value, size_t size, int flags); | |
665 | int ovl_xattr_get(struct dentry *dentry, struct inode *inode, const char *name, | |
0eb45fc3 | 666 | void *value, size_t size); |
e9be9d5e | 667 | ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size); |
ded53656 YX |
668 | |
669 | #ifdef CONFIG_FS_POSIX_ACL | |
77435322 | 670 | struct posix_acl *do_ovl_get_acl(struct mnt_idmap *idmap, |
6c0a8bfb CB |
671 | struct inode *inode, int type, |
672 | bool rcu, bool noperm); | |
673 | static inline struct posix_acl *ovl_get_inode_acl(struct inode *inode, int type, | |
674 | bool rcu) | |
675 | { | |
77435322 | 676 | return do_ovl_get_acl(&nop_mnt_idmap, inode, type, rcu, true); |
6c0a8bfb | 677 | } |
77435322 | 678 | static inline struct posix_acl *ovl_get_acl(struct mnt_idmap *idmap, |
6c0a8bfb CB |
679 | struct dentry *dentry, int type) |
680 | { | |
77435322 | 681 | return do_ovl_get_acl(idmap, d_inode(dentry), type, false, false); |
6c0a8bfb | 682 | } |
13e83a49 | 683 | int ovl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
0e641857 | 684 | struct posix_acl *acl, int type); |
31acceb9 CB |
685 | struct posix_acl *ovl_get_acl_path(const struct path *path, |
686 | const char *acl_name, bool noperm); | |
ded53656 | 687 | #else |
6c0a8bfb CB |
688 | #define ovl_get_inode_acl NULL |
689 | #define ovl_get_acl NULL | |
0e641857 | 690 | #define ovl_set_acl NULL |
31acceb9 CB |
691 | static inline struct posix_acl *ovl_get_acl_path(const struct path *path, |
692 | const char *acl_name, | |
693 | bool noperm) | |
694 | { | |
695 | return NULL; | |
696 | } | |
ded53656 YX |
697 | #endif |
698 | ||
95582b00 | 699 | int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags); |
610afc0b | 700 | bool ovl_is_private_xattr(struct super_block *sb, const char *name); |
e9be9d5e | 701 | |
ac6a52eb | 702 | struct ovl_inode_params { |
01b39dcc | 703 | struct inode *newinode; |
ac6a52eb | 704 | struct dentry *upperdentry; |
0af950f5 | 705 | struct ovl_entry *oe; |
74c6e384 | 706 | bool index; |
9cec54c8 | 707 | char *redirect; |
2b21da92 | 708 | char *lowerdata_redirect; |
ac6a52eb | 709 | }; |
62c832ed AG |
710 | void ovl_inode_init(struct inode *inode, struct ovl_inode_params *oip, |
711 | unsigned long ino, int fsid); | |
ca4c8a3a | 712 | struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, dev_t rdev); |
4b91c30a AG |
713 | struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real, |
714 | bool is_upper); | |
146d62e5 AG |
715 | bool ovl_lookup_trap_inode(struct super_block *sb, struct dentry *dir); |
716 | struct inode *ovl_get_trap_inode(struct super_block *sb, struct dentry *dir); | |
ac6a52eb VG |
717 | struct inode *ovl_get_inode(struct super_block *sb, |
718 | struct ovl_inode_params *oip); | |
2878dffc | 719 | void ovl_copyattr(struct inode *to); |
e9be9d5e | 720 | |
72db8211 AG |
721 | /* vfs inode flags copied from real to ovl inode */ |
722 | #define OVL_COPY_I_FLAGS_MASK (S_SYNC | S_NOATIME | S_APPEND | S_IMMUTABLE) | |
096a218a AG |
723 | /* vfs inode flags read from overlay.protattr xattr to ovl inode */ |
724 | #define OVL_PROT_I_FLAGS_MASK (S_APPEND | S_IMMUTABLE) | |
72db8211 AG |
725 | |
726 | /* | |
727 | * fileattr flags copied from lower to upper inode on copy up. | |
096a218a AG |
728 | * We cannot copy up immutable/append-only flags, because that would prevent |
729 | * linking temp inode to upper dir, so we store them in xattr instead. | |
72db8211 AG |
730 | */ |
731 | #define OVL_COPY_FS_FLAGS_MASK (FS_SYNC_FL | FS_NOATIME_FL) | |
732 | #define OVL_COPY_FSX_FLAGS_MASK (FS_XFLAG_SYNC | FS_XFLAG_NOATIME) | |
096a218a AG |
733 | #define OVL_PROT_FS_FLAGS_MASK (FS_APPEND_FL | FS_IMMUTABLE_FL) |
734 | #define OVL_PROT_FSX_FLAGS_MASK (FS_XFLAG_APPEND | FS_XFLAG_IMMUTABLE) | |
735 | ||
736 | void ovl_check_protattr(struct inode *inode, struct dentry *upper); | |
737 | int ovl_set_protattr(struct inode *inode, struct dentry *upper, | |
738 | struct fileattr *fa); | |
72db8211 | 739 | |
4f357295 MS |
740 | static inline void ovl_copyflags(struct inode *from, struct inode *to) |
741 | { | |
72db8211 | 742 | unsigned int mask = OVL_COPY_I_FLAGS_MASK; |
4f357295 MS |
743 | |
744 | inode_set_flags(to, from->i_flags & mask, mask); | |
745 | } | |
746 | ||
e9be9d5e MS |
747 | /* dir.c */ |
748 | extern const struct inode_operations ovl_dir_inode_operations; | |
c21c839b | 749 | int ovl_cleanup_and_whiteout(struct ovl_fs *ofs, struct inode *dir, |
e7dd0e71 | 750 | struct dentry *dentry); |
471ec5dc | 751 | struct ovl_cattr { |
32a3d848 AV |
752 | dev_t rdev; |
753 | umode_t mode; | |
754 | const char *link; | |
471ec5dc | 755 | struct dentry *hardlink; |
32a3d848 | 756 | }; |
471ec5dc AG |
757 | |
758 | #define OVL_CATTR(m) (&(struct ovl_cattr) { .mode = (m) }) | |
759 | ||
576bb263 CB |
760 | int ovl_mkdir_real(struct ovl_fs *ofs, struct inode *dir, |
761 | struct dentry **newdentry, umode_t mode); | |
762 | struct dentry *ovl_create_real(struct ovl_fs *ofs, | |
763 | struct inode *dir, struct dentry *newdentry, | |
764 | struct ovl_cattr *attr); | |
765 | int ovl_cleanup(struct ovl_fs *ofs, struct inode *dir, struct dentry *dentry); | |
766 | struct dentry *ovl_lookup_temp(struct ovl_fs *ofs, struct dentry *workdir); | |
767 | struct dentry *ovl_create_temp(struct ovl_fs *ofs, struct dentry *workdir, | |
95a1c815 | 768 | struct ovl_cattr *attr); |
e9be9d5e | 769 | |
d1d04ef8 MS |
770 | /* file.c */ |
771 | extern const struct file_operations ovl_file_operations; | |
2406a307 JX |
772 | int __init ovl_aio_request_cache_init(void); |
773 | void ovl_aio_request_cache_destroy(void); | |
2d343087 AV |
774 | int ovl_real_fileattr_get(const struct path *realpath, struct fileattr *fa); |
775 | int ovl_real_fileattr_set(const struct path *realpath, struct fileattr *fa); | |
66dbfabf | 776 | int ovl_fileattr_get(struct dentry *dentry, struct fileattr *fa); |
8782a9ae | 777 | int ovl_fileattr_set(struct mnt_idmap *idmap, |
66dbfabf | 778 | struct dentry *dentry, struct fileattr *fa); |
d1d04ef8 | 779 | |
e9be9d5e MS |
780 | /* copy_up.c */ |
781 | int ovl_copy_up(struct dentry *dentry); | |
d1e6f6a9 | 782 | int ovl_copy_up_with_data(struct dentry *dentry); |
3428030d | 783 | int ovl_maybe_copy_up(struct dentry *dentry, int flags); |
2d343087 | 784 | int ovl_copy_xattr(struct super_block *sb, const struct path *path, struct dentry *new); |
5272eaf3 | 785 | int ovl_set_attr(struct ovl_fs *ofs, struct dentry *upper, struct kstat *stat); |
1cdb0cb6 PT |
786 | struct ovl_fh *ovl_encode_real_fh(struct ovl_fs *ofs, struct dentry *real, |
787 | bool is_upper); | |
a0c236b1 AG |
788 | int ovl_set_origin(struct ovl_fs *ofs, struct dentry *lower, |
789 | struct dentry *upper); | |
8ed5eec9 AG |
790 | |
791 | /* export.c */ | |
792 | extern const struct export_operations ovl_export_operations; |