Lines Matching +full:connected +full:- +full:positive
1 // SPDX-License-Identifier: GPL-2.0-only
39 struct ovl_fs *ofs = OVL_FS(d->sb); in ovl_check_redirect()
41 d->absolute_redirect = false; in ovl_check_redirect()
47 d->absolute_redirect = true; in ovl_check_redirect()
51 * that will stop further lookup in lower layers (d->stop=true) in ovl_check_redirect()
54 * layers (reset d->stop). in ovl_check_redirect()
56 d->stop = false; in ovl_check_redirect()
60 memcpy(buf, d->name.name, prelen); in ovl_check_redirect()
64 kfree(d->redirect); in ovl_check_redirect()
65 d->redirect = buf; in ovl_check_redirect()
66 d->name.name = d->redirect; in ovl_check_redirect()
67 d->name.len = strlen(d->redirect); in ovl_check_redirect()
75 * A non-dir origin may be disconnected, which is fine, because in ovl_acceptable()
86 return is_subdir(dentry, ((struct vfsmount *)ctx)->mnt_root); in ovl_acceptable()
93 * Return -ENODATA for "origin unknown".
98 if (fb_len < sizeof(struct ovl_fb) || fb_len < fb->len) in ovl_check_fb_len()
99 return -EINVAL; in ovl_check_fb_len()
101 if (fb->magic != OVL_FH_MAGIC) in ovl_check_fb_len()
102 return -EINVAL; in ovl_check_fb_len()
105 if (fb->version > OVL_FH_VERSION || fb->flags & ~OVL_FH_FLAG_ALL) in ovl_check_fb_len()
106 return -ENODATA; in ovl_check_fb_len()
109 if (!(fb->flags & OVL_FH_FLAG_ANY_ENDIAN) && in ovl_check_fb_len()
110 (fb->flags & OVL_FH_FLAG_BIG_ENDIAN) != OVL_FH_FLAG_CPU_ENDIAN) in ovl_check_fb_len()
111 return -ENODATA; in ovl_check_fb_len()
124 if (res == -ENODATA || res == -EOPNOTSUPP) in ovl_get_fh()
134 return ERR_PTR(-ENOMEM); in ovl_get_fh()
136 res = ovl_getxattr_upper(ofs, upperdentry, ox, fh->buf, res); in ovl_get_fh()
140 err = ovl_check_fb_len(&fh->fb, res); in ovl_get_fh()
142 if (err == -ENODATA) in ovl_get_fh()
162 struct vfsmount *mnt, bool connected) in ovl_decode_real_fh() argument
176 !uuid_equal(&fh->fb.uuid, &mnt->mnt_sb->s_uuid) : in ovl_decode_real_fh()
177 !uuid_is_null(&fh->fb.uuid)) in ovl_decode_real_fh()
180 bytes = (fh->fb.len - offsetof(struct ovl_fb, fid)); in ovl_decode_real_fh()
181 real = exportfs_decode_fh(mnt, (struct fid *)fh->fb.fid, in ovl_decode_real_fh()
182 bytes >> 2, (int)fh->fb.type, in ovl_decode_real_fh()
183 connected ? ovl_acceptable : NULL, mnt); in ovl_decode_real_fh()
191 if (real == ERR_PTR(-ESTALE) && in ovl_decode_real_fh()
192 !(fh->fb.flags & OVL_FH_FLAG_PATH_UPPER)) in ovl_decode_real_fh()
210 struct dentry *ret = lookup_one_unlocked(mnt_idmap(d->layer->mnt), name, in ovl_lookup_positive_unlocked()
213 if (!IS_ERR(ret) && d_flags_negative(smp_load_acquire(&ret->d_flags))) { in ovl_lookup_positive_unlocked()
214 if (drop_negative && ret->d_lockref.count == 1) { in ovl_lookup_positive_unlocked()
215 spin_lock(&ret->d_lock); in ovl_lookup_positive_unlocked()
217 if (d_is_negative(ret) && ret->d_lockref.count == 1) in ovl_lookup_positive_unlocked()
219 spin_unlock(&ret->d_lock); in ovl_lookup_positive_unlocked()
222 ret = ERR_PTR(-ENOENT); in ovl_lookup_positive_unlocked()
232 struct ovl_fs *ofs = OVL_FS(d->sb); in ovl_lookup_single()
237 bool is_upper = d->layer->idx == 0; in ovl_lookup_single()
244 if (err == -ENOENT || err == -ENAMETOOLONG) in ovl_lookup_single()
251 err = -EREMOTE; in ovl_lookup_single()
256 path.mnt = d->layer->mnt; in ovl_lookup_single()
258 d->stop = d->opaque = true; in ovl_lookup_single()
265 if (last_element && d->metacopy && !d_is_reg(this)) { in ovl_lookup_single()
266 d->stop = true; in ovl_lookup_single()
271 if (d->is_dir || !last_element) { in ovl_lookup_single()
272 d->stop = true; in ovl_lookup_single()
279 d->metacopy = err; in ovl_lookup_single()
280 d->stop = !d->metacopy; in ovl_lookup_single()
281 if (!d->metacopy || d->last) in ovl_lookup_single()
284 if (ovl_lookup_trap_inode(d->sb, this)) { in ovl_lookup_single()
286 err = -ELOOP; in ovl_lookup_single()
291 d->is_dir = true; in ovl_lookup_single()
292 if (d->last) in ovl_lookup_single()
298 d->xwhiteouts = true; in ovl_lookup_single()
299 ovl_layer_set_xwhiteouts(ofs, d->layer); in ovl_lookup_single()
301 d->stop = true; in ovl_lookup_single()
303 d->opaque = true; in ovl_lookup_single()
328 size_t rem = d->name.len - 1; in ovl_lookup_layer()
332 if (d->name.name[0] != '/') in ovl_lookup_layer()
333 return ovl_lookup_single(base, d, d->name.name, d->name.len, in ovl_lookup_layer()
337 const char *s = d->name.name + d->name.len - rem; in ovl_lookup_layer()
339 size_t thislen = next - s; in ovl_lookup_layer()
343 if (WARN_ON(s[-1] != '/')) in ovl_lookup_layer()
344 return -EIO; in ovl_lookup_layer()
347 d->name.len - rem, next, &base, in ovl_lookup_layer()
356 rem -= thislen + 1; in ovl_lookup_layer()
358 if (WARN_ON(rem >= d->name.len)) in ovl_lookup_layer()
359 return -EIO; in ovl_lookup_layer()
371 err = vfs_path_lookup(layer->mnt->mnt_root, layer->mnt, redirect, in ovl_lookup_data_layer()
375 dentry, redirect, layer->idx, err); in ovl_lookup_data_layer()
380 err = -EREMOTE; in ovl_lookup_data_layer()
381 if (ovl_dentry_weird(datapath->dentry)) in ovl_lookup_data_layer()
384 err = -ENOENT; in ovl_lookup_data_layer()
386 if (!d_is_reg(datapath->dentry)) in ovl_lookup_data_layer()
397 /* Lookup in data-only layers by absolute redirect to layer root */
401 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_lookup_data_layers()
404 int err = -ENOENT; in ovl_lookup_data_layers()
407 layer = &ofs->layers[ofs->numlayer - ofs->numdatalayer]; in ovl_lookup_data_layers()
408 for (i = 0; i < ofs->numdatalayer; i++, layer++) { in ovl_lookup_data_layers()
412 lowerdata->dentry = datapath.dentry; in ovl_lookup_data_layers()
413 lowerdata->layer = layer; in ovl_lookup_data_layers()
421 int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected, in ovl_check_origin_fh() argument
430 * fh->uuid to layer. in ovl_check_origin_fh()
432 if (ofs->layers[i].fsid && in ovl_check_origin_fh()
433 ofs->layers[i].fs->bad_uuid) in ovl_check_origin_fh()
436 origin = ovl_decode_real_fh(ofs, fh, ofs->layers[i].mnt, in ovl_check_origin_fh()
437 connected); in ovl_check_origin_fh()
443 return -ESTALE; in ovl_check_origin_fh()
448 inode_wrong_type(d_inode(upperdentry), d_inode(origin)->i_mode)) in ovl_check_origin_fh()
455 return -ENOMEM; in ovl_check_origin_fh()
459 .layer = &ofs->layers[i] in ovl_check_origin_fh()
466 upperdentry, d_inode(upperdentry)->i_mode & S_IFMT, in ovl_check_origin_fh()
467 d_inode(origin)->i_mode & S_IFMT); in ovl_check_origin_fh()
469 return -ESTALE; in ovl_check_origin_fh()
485 if (err == -ESTALE) in ovl_check_origin()
495 * Return 0 on match, -ESTALE on mismatch, < 0 on error.
504 return -ENODATA; in ovl_verify_fh()
509 if (fh->fb.len != ofh->fb.len || memcmp(&fh->fb, &ofh->fb, fh->fb.len)) in ovl_verify_fh()
510 err = -ESTALE; in ovl_verify_fh()
523 if (set && err == -ENODATA) in ovl_verify_set_fh()
524 err = ovl_setxattr(ofs, dentry, ox, fh->buf, fh->fb.len); in ovl_verify_set_fh()
535 * Return 0 on match, -ESTALE on mismatch, -ENODATA on no xattr, < 0 on error.
564 inode ? inode->i_ino : 0, err); in ovl_verify_origin_xattr()
571 bool connected) in ovl_index_upper() argument
583 upper = ovl_decode_real_fh(ofs, fh, ovl_upper_mnt(ofs), connected); in ovl_index_upper()
587 return upper ?: ERR_PTR(-ESTALE); in ovl_index_upper()
593 return ERR_PTR(-EIO); in ovl_index_upper()
602 * Return 0 on match, -ESTALE on mismatch or stale origin, < 0 on error.
616 err = -EINVAL; in ovl_verify_index()
617 if (index->d_name.len < sizeof(struct ovl_fb)*2) in ovl_verify_index()
620 err = -ENOMEM; in ovl_verify_index()
621 len = index->d_name.len / 2; in ovl_verify_index()
626 err = -EINVAL; in ovl_verify_index()
627 if (hex2bin(fh->buf, index->d_name.name, len)) in ovl_verify_index()
630 err = ovl_check_fb_len(&fh->fb, len); in ovl_verify_index()
646 if (d_is_dir(index) && !ofs->config.nfs_export) in ovl_verify_index()
651 * real upper dir. Non-dir index entries are hardlinks to the upper in ovl_verify_index()
652 * real inode. For non-dir index, we can read the copy up origin xattr in ovl_verify_index()
665 if (err == -ESTALE) in ovl_verify_index()
668 err = -ESTALE; in ovl_verify_index()
677 /* Check if non-dir index is orphan and don't warn before cleaning it */ in ovl_verify_index()
678 if (!d_is_dir(index) && d_inode(index)->i_nlink == 1) { in ovl_verify_index()
694 index, d_inode(index)->i_mode & S_IFMT, err); in ovl_verify_index()
699 index, d_inode(index)->i_mode & S_IFMT, in ovl_verify_index()
700 d_inode(index)->i_nlink); in ovl_verify_index()
701 err = -ENOENT; in ovl_verify_index()
709 n = kcalloc(fh->fb.len, 2, GFP_KERNEL); in ovl_get_index_name_fh()
711 return -ENOMEM; in ovl_get_index_name_fh()
713 s = bin2hex(n, fh->buf, fh->fb.len); in ovl_get_index_name_fh()
714 *name = (struct qstr) QSTR_INIT(n, s - n); in ovl_get_index_name_fh()
729 * If the index dentry for a copy up origin inode is positive, but points
762 index = lookup_positive_unlocked(name.name, ofs->workdir, name.len); in ovl_get_index_fh()
765 if (PTR_ERR(index) == -ENOENT) in ovl_get_index_fh()
771 err = -ESTALE; in ovl_get_index_fh()
773 err = -EIO; in ovl_get_index_fh()
795 ofs->workdir, name.len); in ovl_lookup_index()
798 if (err == -ENOENT) { in ovl_lookup_index()
803 "overlayfs: mount with '-o index=off' to disable inodes index.\n", in ovl_lookup_index()
804 d_inode(origin)->i_ino, name.len, name.name, in ovl_lookup_index()
818 index = ERR_PTR(-ESTALE); in ovl_lookup_index()
821 inode_wrong_type(inode, d_inode(origin)->i_mode)) { in ovl_lookup_index()
830 index, d_inode(index)->i_mode & S_IFMT, in ovl_lookup_index()
831 d_inode(origin)->i_mode & S_IFMT); in ovl_lookup_index()
843 if (err == -ESTALE) { in ovl_lookup_index()
863 index = ERR_PTR(-EIO); in ovl_lookup_index()
869 * Returns -1 if this is the last layer.
880 if (path->dentry) { in ovl_path_next()
881 *layer = &OVL_FS(dentry->d_sb)->layers[0]; in ovl_path_next()
882 return ovl_numlower(oe) ? 1 : -1; in ovl_path_next()
887 path->dentry = lowerstack[idx - 1].dentry; in ovl_path_next()
888 *layer = lowerstack[idx - 1].layer; in ovl_path_next()
889 path->mnt = (*layer)->mnt; in ovl_path_next()
891 return (idx < ovl_numlower(oe)) ? idx + 1 : -1; in ovl_path_next()
914 err = ovl_set_impure(dentry->d_parent, upper->d_parent); in ovl_fix_origin()
924 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_maybe_validate_verity()
929 if (!ofs->config.verity_mode || in ovl_maybe_validate_verity()
935 if (ofs->config.verity_mode == OVL_VERITY_REQUIRE) { in ovl_maybe_validate_verity()
938 return -EIO; in ovl_maybe_validate_verity()
945 return -EIO; in ovl_maybe_validate_verity()
949 return -EIO; in ovl_maybe_validate_verity()
958 old_cred = ovl_override_creds(dentry->d_sb); in ovl_maybe_validate_verity()
985 return -EIO; in ovl_maybe_lookup_lowerdata()
996 old_cred = ovl_override_creds(dentry->d_sb); in ovl_maybe_lookup_lowerdata()
1034 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_lookup()
1035 struct ovl_entry *poe = OVL_E(dentry->d_parent); in ovl_lookup()
1036 struct ovl_entry *roe = OVL_E(dentry->d_sb->s_root); in ovl_lookup()
1051 .sb = dentry->d_sb, in ovl_lookup()
1052 .name = dentry->d_name, in ovl_lookup()
1061 if (dentry->d_name.len > ofs->namelen) in ovl_lookup()
1062 return ERR_PTR(-ENAMETOOLONG); in ovl_lookup()
1064 old_cred = ovl_override_creds(dentry->d_sb); in ovl_lookup()
1065 upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_lookup()
1067 d.layer = &ofs->layers[0]; in ovl_lookup()
1072 if (upperdentry && upperdentry->d_flags & DCACHE_OP_REAL) { in ovl_lookup()
1074 err = -EREMOTE; in ovl_lookup()
1083 * connected dentry, that is not under any of the lower in ovl_lookup()
1085 * number - it's the same as if we held a reference in ovl_lookup()
1098 err = -ENOMEM; in ovl_lookup()
1109 err = -ENOMEM; in ovl_lookup()
1110 stack = ovl_stack_alloc(ofs->numlayer - 1); in ovl_lookup()
1119 d.last = i == ovl_numlower(poe) - 1; in ovl_lookup()
1120 else if (d.is_dir || !ofs->numdatalayer) in ovl_lookup()
1121 d.last = lower.layer->idx == ovl_numlower(roe); in ovl_lookup()
1131 if ((uppermetacopy || d.metacopy) && !ofs->config.metacopy) { in ovl_lookup()
1133 err = -EPERM; in ovl_lookup()
1142 if (upperdentry && !ctr && !ofs->noxattr && d.is_dir) { in ovl_lookup()
1155 * For non-dir dentry, if index=on, then ensure origin in ovl_lookup()
1160 ((d.is_dir && ovl_verify_lower(dentry->d_sb)) || in ovl_lookup()
1161 (!d.is_dir && ofs->config.index && origin_path))) { in ovl_lookup()
1194 * comes from an USB drive). This can allow a non-readable file in ovl_lookup()
1200 err = -EPERM; in ovl_lookup()
1213 i = lower.layer->idx - 1; in ovl_lookup()
1217 /* Defer lookup of lowerdata in data-only layers to first access */ in ovl_lookup()
1218 if (d.metacopy && ctr && ofs->numdatalayer && d.absolute_redirect) { in ovl_lookup()
1224 * For regular non-metacopy upper dentries, there is no lower in ovl_lookup()
1232 pr_warn_ratelimited("metacopy with no lower data found - abort lookup (%pd2)\n", in ovl_lookup()
1234 err = -EIO; in ovl_lookup()
1238 err = -EIO; in ovl_lookup()
1243 origin = origin_path->dentry; in ovl_lookup()
1248 * Always lookup index if there is no-upperdentry. in ovl_lookup()
1269 if (origin && ovl_indexdir(dentry->d_sb) && in ovl_lookup()
1270 (!d.is_dir || ovl_index_all(dentry->d_sb))) { in ovl_lookup()
1281 err = -ENOMEM; in ovl_lookup()
1303 * assignment of happens only if upperdentry is non-NULL, and in ovl_lookup()
1328 if (ctr > 1 && !d.is_dir && !stack[ctr - 1].dentry) { in ovl_lookup()
1332 inode = ovl_get_inode(dentry->d_sb, &oip); in ovl_lookup()
1347 dput(origin_path->dentry); in ovl_lookup()
1362 dput(origin_path->dentry); in ovl_lookup()
1375 struct ovl_entry *poe = OVL_E(dentry->d_parent); in ovl_lower_positive()
1376 const struct qstr *name = &dentry->d_name; in ovl_lower_positive()
1379 bool positive = false; in ovl_lower_positive() local
1383 * If dentry is negative, then lower is positive iff this is a in ovl_lower_positive()
1386 if (!dentry->d_inode) in ovl_lower_positive()
1389 /* Negative upper -> positive lower */ in ovl_lower_positive()
1393 old_cred = ovl_override_creds(dentry->d_sb); in ovl_lower_positive()
1394 /* Positive upper -> have to look up lower to see whether it exists */ in ovl_lower_positive()
1395 for (i = 0; !done && !positive && i < ovl_numlower(poe); i++) { in ovl_lower_positive()
1400 mnt_idmap(parentpath->layer->mnt), in ovl_lower_positive()
1401 name->name, parentpath->dentry, name->len); in ovl_lower_positive()
1404 case -ENOENT: in ovl_lower_positive()
1405 case -ENAMETOOLONG: in ovl_lower_positive()
1413 positive = true; in ovl_lower_positive()
1419 .mnt = parentpath->layer->mnt, in ovl_lower_positive()
1421 positive = !ovl_path_is_whiteout(OVL_FS(dentry->d_sb), &path); in ovl_lower_positive()
1428 return positive; in ovl_lower_positive()