Lines Matching refs:dentry
25 static int ovl_set_redirect(struct dentry *dentry, bool samedir);
28 struct dentry *wdentry) in ovl_cleanup_locked()
47 int ovl_cleanup(struct ovl_fs *ofs, struct dentry *workdir, in ovl_cleanup()
48 struct dentry *wdentry) in ovl_cleanup()
62 struct dentry *ovl_lookup_temp(struct ovl_fs *ofs, struct dentry *workdir) in ovl_lookup_temp()
64 struct dentry *temp; in ovl_lookup_temp()
81 static struct dentry *ovl_whiteout(struct ovl_fs *ofs) in ovl_whiteout()
84 struct dentry *whiteout; in ovl_whiteout()
85 struct dentry *workdir = ofs->workdir; in ovl_whiteout()
131 int ovl_cleanup_and_whiteout(struct ovl_fs *ofs, struct dentry *dir, in ovl_cleanup_and_whiteout()
132 struct dentry *dentry) in ovl_cleanup_and_whiteout() argument
134 struct dentry *whiteout; in ovl_cleanup_and_whiteout()
143 if (d_is_dir(dentry)) in ovl_cleanup_and_whiteout()
146 err = ovl_lock_rename_workdir(ofs->workdir, whiteout, dir, dentry); in ovl_cleanup_and_whiteout()
148 err = ovl_do_rename(ofs, ofs->workdir, whiteout, dir, dentry, flags); in ovl_cleanup_and_whiteout()
154 ovl_cleanup(ofs, ofs->workdir, dentry); in ovl_cleanup_and_whiteout()
165 struct dentry *ovl_create_real(struct ovl_fs *ofs, struct dentry *parent, in ovl_create_real()
166 struct dentry *newdentry, struct ovl_cattr *attr) in ovl_create_real()
224 struct dentry *ovl_create_temp(struct ovl_fs *ofs, struct dentry *workdir, in ovl_create_temp()
227 struct dentry *ret; in ovl_create_temp()
235 static int ovl_set_opaque_xerr(struct dentry *dentry, struct dentry *upper, in ovl_set_opaque_xerr() argument
238 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_set_opaque_xerr()
243 ovl_dentry_set_opaque(dentry); in ovl_set_opaque_xerr()
248 static int ovl_set_opaque(struct dentry *dentry, struct dentry *upperdentry) in ovl_set_opaque() argument
255 return ovl_set_opaque_xerr(dentry, upperdentry, -EIO); in ovl_set_opaque()
263 static int ovl_instantiate(struct dentry *dentry, struct inode *inode, in ovl_instantiate() argument
264 struct dentry *newdentry, bool hardlink, struct file *tmpfile) in ovl_instantiate()
271 ovl_dentry_set_upper_alias(dentry); in ovl_instantiate()
272 ovl_dentry_init_reval(dentry, newdentry, NULL); in ovl_instantiate()
288 inode = ovl_get_inode(dentry->d_sb, &oip); in ovl_instantiate()
302 d_instantiate(dentry, inode); in ovl_instantiate()
305 dentry); in ovl_instantiate()
310 d_drop(dentry); in ovl_instantiate()
315 static bool ovl_type_merge(struct dentry *dentry) in ovl_type_merge() argument
317 return OVL_TYPE_MERGE(ovl_path_type(dentry)); in ovl_type_merge()
320 static bool ovl_type_origin(struct dentry *dentry) in ovl_type_origin() argument
322 return OVL_TYPE_ORIGIN(ovl_path_type(dentry)); in ovl_type_origin()
325 static int ovl_create_upper(struct dentry *dentry, struct inode *inode, in ovl_create_upper() argument
328 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_create_upper()
329 struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_create_upper()
331 struct dentry *newdentry; in ovl_create_upper()
336 ovl_lookup_upper(ofs, dentry->d_name.name, in ovl_create_upper()
337 upperdir, dentry->d_name.len), in ovl_create_upper()
343 if (ovl_type_merge(dentry->d_parent) && d_is_dir(newdentry) && in ovl_create_upper()
346 ovl_set_opaque(dentry, newdentry); in ovl_create_upper()
349 ovl_dir_modified(dentry->d_parent, false); in ovl_create_upper()
350 err = ovl_instantiate(dentry, inode, newdentry, !!attr->hardlink, NULL); in ovl_create_upper()
361 static struct dentry *ovl_clear_empty(struct dentry *dentry, in ovl_clear_empty() argument
364 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_clear_empty()
365 struct dentry *workdir = ovl_workdir(dentry); in ovl_clear_empty()
366 struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_clear_empty()
368 struct dentry *upper; in ovl_clear_empty()
369 struct dentry *opaquedir; in ovl_clear_empty()
376 ovl_path_upper(dentry, &upperpath); in ovl_clear_empty()
385 upper = upperpath.dentry; in ovl_clear_empty()
396 err = ovl_copy_xattr(dentry->d_sb, &upperpath, opaquedir); in ovl_clear_empty()
400 err = ovl_set_opaque(dentry, opaquedir); in ovl_clear_empty()
419 d_drop(dentry); in ovl_clear_empty()
432 static int ovl_set_upper_acl(struct ovl_fs *ofs, struct dentry *upperdentry, in ovl_set_upper_acl()
441 static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode, in ovl_create_over_whiteout() argument
444 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_create_over_whiteout()
445 struct dentry *workdir = ovl_workdir(dentry); in ovl_create_over_whiteout()
446 struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_create_over_whiteout()
447 struct dentry *upper; in ovl_create_over_whiteout()
448 struct dentry *newdentry; in ovl_create_over_whiteout()
457 err = posix_acl_create(dentry->d_parent->d_inode, in ovl_create_over_whiteout()
463 upper = ovl_lookup_upper_unlocked(ofs, dentry->d_name.name, upperdir, in ovl_create_over_whiteout()
464 dentry->d_name.len); in ovl_create_over_whiteout()
511 err = ovl_set_opaque(dentry, newdentry); in ovl_create_over_whiteout()
528 ovl_dir_modified(dentry->d_parent, false); in ovl_create_over_whiteout()
529 err = ovl_instantiate(dentry, inode, newdentry, hardlink, NULL); in ovl_create_over_whiteout()
551 static const struct cred *ovl_setup_cred_for_create(struct dentry *dentry, in ovl_setup_cred_for_create() argument
565 err = security_dentry_create_files_as(dentry, mode, &dentry->d_name, in ovl_setup_cred_for_create()
579 WARN_ON_ONCE(old_cred != ovl_creds(dentry->d_sb)); in ovl_setup_cred_for_create()
584 static int ovl_create_or_link(struct dentry *dentry, struct inode *inode, in ovl_create_or_link() argument
589 struct dentry *parent = dentry->d_parent; in ovl_create_or_link()
591 old_cred = ovl_override_creds(dentry->d_sb); in ovl_create_or_link()
617 new_cred = ovl_setup_cred_for_create(dentry, inode, attr->mode, in ovl_create_or_link()
626 if (!ovl_dentry_is_whiteout(dentry)) in ovl_create_or_link()
627 err = ovl_create_upper(dentry, inode, attr); in ovl_create_or_link()
629 err = ovl_create_over_whiteout(dentry, inode, attr); in ovl_create_or_link()
637 static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev, in ovl_create_object() argument
647 err = ovl_copy_up(dentry->d_parent); in ovl_create_object()
651 err = ovl_want_write(dentry); in ovl_create_object()
657 inode = ovl_new_inode(dentry->d_sb, mode, rdev); in ovl_create_object()
665 inode_init_owner(&nop_mnt_idmap, inode, dentry->d_parent->d_inode, mode); in ovl_create_object()
668 err = ovl_create_or_link(dentry, inode, &attr, false); in ovl_create_object()
670 if (inode != d_inode(dentry)) in ovl_create_object()
674 ovl_drop_write(dentry); in ovl_create_object()
680 struct dentry *dentry, umode_t mode, bool excl) in ovl_create() argument
682 return ovl_create_object(dentry, (mode & 07777) | S_IFREG, 0, NULL); in ovl_create()
685 static struct dentry *ovl_mkdir(struct mnt_idmap *idmap, struct inode *dir, in ovl_mkdir()
686 struct dentry *dentry, umode_t mode) in ovl_mkdir() argument
688 return ERR_PTR(ovl_create_object(dentry, (mode & 07777) | S_IFDIR, 0, NULL)); in ovl_mkdir()
692 struct dentry *dentry, umode_t mode, dev_t rdev) in ovl_mknod() argument
698 return ovl_create_object(dentry, mode, rdev, NULL); in ovl_mknod()
702 struct dentry *dentry, const char *link) in ovl_symlink() argument
704 return ovl_create_object(dentry, S_IFLNK, 0, link); in ovl_symlink()
707 static int ovl_set_link_redirect(struct dentry *dentry) in ovl_set_link_redirect() argument
712 old_cred = ovl_override_creds(dentry->d_sb); in ovl_set_link_redirect()
713 err = ovl_set_redirect(dentry, false); in ovl_set_link_redirect()
719 static int ovl_link(struct dentry *old, struct inode *newdir, in ovl_link()
720 struct dentry *new) in ovl_link()
758 static bool ovl_matches_upper(struct dentry *dentry, struct dentry *upper) in ovl_matches_upper() argument
760 return d_inode(ovl_dentry_upper(dentry)) == d_inode(upper); in ovl_matches_upper()
763 static int ovl_remove_and_whiteout(struct dentry *dentry, in ovl_remove_and_whiteout() argument
766 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_remove_and_whiteout()
767 struct dentry *workdir = ovl_workdir(dentry); in ovl_remove_and_whiteout()
768 struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_remove_and_whiteout()
769 struct dentry *upper; in ovl_remove_and_whiteout()
770 struct dentry *opaquedir = NULL; in ovl_remove_and_whiteout()
777 opaquedir = ovl_clear_empty(dentry, list); in ovl_remove_and_whiteout()
783 upper = ovl_lookup_upper_unlocked(ofs, dentry->d_name.name, upperdir, in ovl_remove_and_whiteout()
784 dentry->d_name.len); in ovl_remove_and_whiteout()
791 (!opaquedir && ovl_dentry_upper(dentry) && in ovl_remove_and_whiteout()
792 !ovl_matches_upper(dentry, upper))) { in ovl_remove_and_whiteout()
798 ovl_dir_modified(dentry->d_parent, true); in ovl_remove_and_whiteout()
800 d_drop(dentry); in ovl_remove_and_whiteout()
809 static int ovl_remove_upper(struct dentry *dentry, bool is_dir, in ovl_remove_upper() argument
812 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_remove_upper()
813 struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent); in ovl_remove_upper()
815 struct dentry *upper; in ovl_remove_upper()
816 struct dentry *opaquedir = NULL; in ovl_remove_upper()
820 opaquedir = ovl_clear_empty(dentry, list); in ovl_remove_upper()
827 upper = ovl_lookup_upper(ofs, dentry->d_name.name, upperdir, in ovl_remove_upper()
828 dentry->d_name.len); in ovl_remove_upper()
835 (!opaquedir && !ovl_matches_upper(dentry, upper))) in ovl_remove_upper()
842 ovl_dir_modified(dentry->d_parent, ovl_type_origin(dentry)); in ovl_remove_upper()
851 d_drop(dentry); in ovl_remove_upper()
861 static bool ovl_pure_upper(struct dentry *dentry) in ovl_pure_upper() argument
863 return !ovl_dentry_lower(dentry) && in ovl_pure_upper()
864 !ovl_test_flag(OVL_WHITEOUTS, d_inode(dentry)); in ovl_pure_upper()
867 static void ovl_drop_nlink(struct dentry *dentry) in ovl_drop_nlink() argument
869 struct inode *inode = d_inode(dentry); in ovl_drop_nlink()
870 struct dentry *alias; in ovl_drop_nlink()
875 if (alias != dentry && !d_unhashed(alias)) in ovl_drop_nlink()
889 static int ovl_do_remove(struct dentry *dentry, bool is_dir) in ovl_do_remove() argument
893 bool lower_positive = ovl_lower_positive(dentry); in ovl_do_remove()
897 if (is_dir && (lower_positive || !ovl_pure_upper(dentry))) { in ovl_do_remove()
898 err = ovl_check_empty_dir(dentry, &list); in ovl_do_remove()
903 err = ovl_copy_up(dentry->d_parent); in ovl_do_remove()
907 err = ovl_nlink_start(dentry); in ovl_do_remove()
911 old_cred = ovl_override_creds(dentry->d_sb); in ovl_do_remove()
913 err = ovl_remove_upper(dentry, is_dir, &list); in ovl_do_remove()
915 err = ovl_remove_and_whiteout(dentry, &list); in ovl_do_remove()
919 clear_nlink(dentry->d_inode); in ovl_do_remove()
921 ovl_drop_nlink(dentry); in ovl_do_remove()
923 ovl_nlink_end(dentry); in ovl_do_remove()
931 if (ovl_dentry_upper(dentry)) in ovl_do_remove()
932 ovl_copyattr(d_inode(dentry)); in ovl_do_remove()
939 static int ovl_unlink(struct inode *dir, struct dentry *dentry) in ovl_unlink() argument
941 return ovl_do_remove(dentry, false); in ovl_unlink()
944 static int ovl_rmdir(struct inode *dir, struct dentry *dentry) in ovl_rmdir() argument
946 return ovl_do_remove(dentry, true); in ovl_rmdir()
949 static bool ovl_type_merge_or_lower(struct dentry *dentry) in ovl_type_merge_or_lower() argument
951 enum ovl_path_type type = ovl_path_type(dentry); in ovl_type_merge_or_lower()
956 static bool ovl_can_move(struct dentry *dentry) in ovl_can_move() argument
958 return ovl_redirect_dir(OVL_FS(dentry->d_sb)) || in ovl_can_move()
959 !d_is_dir(dentry) || !ovl_type_merge_or_lower(dentry); in ovl_can_move()
962 static char *ovl_get_redirect(struct dentry *dentry, bool abs_redirect) in ovl_get_redirect() argument
965 struct dentry *d, *tmp; in ovl_get_redirect()
969 ret = kstrndup(dentry->d_name.name, dentry->d_name.len, in ovl_get_redirect()
980 for (d = dget(dentry); !IS_ROOT(d);) { in ovl_get_redirect()
1022 static bool ovl_need_absolute_redirect(struct dentry *dentry, bool samedir) in ovl_need_absolute_redirect() argument
1024 struct dentry *lowerdentry; in ovl_need_absolute_redirect()
1029 if (d_is_dir(dentry)) in ovl_need_absolute_redirect()
1045 lowerdentry = ovl_dentry_lower(dentry); in ovl_need_absolute_redirect()
1049 static int ovl_set_redirect(struct dentry *dentry, bool samedir) in ovl_set_redirect() argument
1052 struct ovl_fs *ofs = OVL_FS(dentry->d_sb); in ovl_set_redirect()
1053 const char *redirect = ovl_dentry_get_redirect(dentry); in ovl_set_redirect()
1054 bool absolute_redirect = ovl_need_absolute_redirect(dentry, samedir); in ovl_set_redirect()
1059 redirect = ovl_get_redirect(dentry, absolute_redirect); in ovl_set_redirect()
1063 err = ovl_check_setxattr(ofs, ovl_dentry_upper(dentry), in ovl_set_redirect()
1067 spin_lock(&dentry->d_lock); in ovl_set_redirect()
1068 ovl_dentry_set_redirect(dentry, redirect); in ovl_set_redirect()
1069 spin_unlock(&dentry->d_lock); in ovl_set_redirect()
1081 struct dentry *old, struct inode *newdir, in ovl_rename()
1082 struct dentry *new, unsigned int flags) in ovl_rename()
1085 struct dentry *old_upperdir; in ovl_rename()
1086 struct dentry *new_upperdir; in ovl_rename()
1087 struct dentry *olddentry = NULL; in ovl_rename()
1088 struct dentry *newdentry = NULL; in ovl_rename()
1089 struct dentry *trap, *de; in ovl_rename()
1098 struct dentry *opaquedir = NULL; in ovl_rename()
1310 static int ovl_create_tmpfile(struct file *file, struct dentry *dentry, in ovl_create_tmpfile() argument
1317 struct dentry *newdentry; in ovl_create_tmpfile()
1322 old_cred = ovl_override_creds(dentry->d_sb); in ovl_create_tmpfile()
1323 new_cred = ovl_setup_cred_for_create(dentry, inode, mode, old_cred); in ovl_create_tmpfile()
1330 ovl_path_upper(dentry->d_parent, &realparentpath); in ovl_create_tmpfile()
1334 pr_debug("tmpfile/open(%pd2, 0%o) = %i\n", realparentpath.dentry, mode, err); in ovl_create_tmpfile()
1346 newdentry = dget(realfile->f_path.dentry); in ovl_create_tmpfile()
1347 err = ovl_instantiate(dentry, inode, newdentry, false, file); in ovl_create_tmpfile()
1369 struct dentry *dentry = file->f_path.dentry; in ovl_tmpfile() local
1372 if (!OVL_FS(dentry->d_sb)->tmpfile) in ovl_tmpfile()
1375 err = ovl_copy_up(dentry->d_parent); in ovl_tmpfile()
1379 err = ovl_want_write(dentry); in ovl_tmpfile()
1384 inode = ovl_new_inode(dentry->d_sb, mode, 0); in ovl_tmpfile()
1389 err = ovl_create_tmpfile(file, dentry, inode, inode->i_mode); in ovl_tmpfile()
1399 if (WARN_ON(inode != d_inode(dentry))) in ovl_tmpfile()
1404 err = finish_open(file, dentry, ovl_dummy_open); in ovl_tmpfile()
1412 ovl_drop_write(dentry); in ovl_tmpfile()