Switch over to Matt's idea of using FLAG_OWNED_BY_US.
[rsync.git] / generator.c
index 10500a99fc517d9df2b0151a1ed668820b84cc65..0c3060458deba2d6ba9aeec9ac97c5d4ac2dbe88 100644 (file)
@@ -4,7 +4,7 @@
  * Copyright (C) 1996-2000 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
- * Copyright (C) 2003-2008 Wayne Davison
+ * Copyright (C) 2003-2009 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -44,8 +44,6 @@ extern int preserve_hard_links;
 extern int preserve_executability;
 extern int preserve_perms;
 extern int preserve_times;
-extern int uid_ndx;
-extern int gid_ndx;
 extern int delete_mode;
 extern int delete_before;
 extern int delete_during;
@@ -76,7 +74,7 @@ extern int fuzzy_basis;
 extern int always_checksum;
 extern int checksum_len;
 extern char *partial_dir;
-extern char *basis_dir[];
+extern char *basis_dir[MAX_BASIS_DIRS+1];
 extern int compare_dest;
 extern int copy_dest;
 extern int link_dest;
@@ -97,7 +95,7 @@ extern char *backup_dir;
 extern char *backup_suffix;
 extern int backup_suffix_len;
 extern struct file_list *cur_flist, *first_flist, *dir_flist;
-extern struct filter_list_struct server_filter_list;
+extern struct filter_list_struct daemon_filter_list;
 
 int ignore_perishable = 0;
 int non_perishable_cnt = 0;
@@ -108,7 +106,7 @@ static int deletion_count = 0; /* used to implement --max-delete */
 static int deldelay_size = 0, deldelay_cnt = 0;
 static char *deldelay_buf = NULL;
 static int deldelay_fd = -1;
-static int lull_mod;
+static int loopchk_limit;
 static int dir_tweaking;
 static int symlink_timeset_failed_flags;
 static int need_retouch_dir_times;
@@ -135,8 +133,12 @@ enum delret {
     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 };
 
-/* Forward declaration for delete_item(). */
+/* Forward declarations. */
 static enum delret delete_dir_contents(char *fname, uint16 flags);
+#ifdef SUPPORT_HARD_LINKS
+static void handle_skipped_hlink(struct file_struct *file, int itemizing,
+                                enum logcode code, int f_out);
+#endif
 
 static int is_backup_file(char *fn)
 {
@@ -165,19 +167,12 @@ static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
                do_chmod(fbuf, mode | S_IWUSR);
 
        if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
-               int save_uid_ndx = uid_ndx;
                /* This only happens on the first call to delete_item() since
                 * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
-               if (!uid_ndx)
-                       uid_ndx = ++file_extra_cnt;
                ignore_perishable = 1;
                /* If DEL_RECURSE is not set, this just reports emptiness. */
                ret = delete_dir_contents(fbuf, flags);
                ignore_perishable = 0;
-               if (!save_uid_ndx) {
-                       --file_extra_cnt;
-                       uid_ndx = 0;
-               }
                if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
                        goto check_ret;
                /* OK: try to delete the directory. */
@@ -290,7 +285,7 @@ static enum delret delete_dir_contents(char *fname, uint16 flags)
                }
 
                strlcpy(p, fp->basename, remainder);
-               if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
+               if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
                        do_chmod(fname, fp->mode | S_IWUSR);
                /* Save stack by recursing to ourself directly. */
                if (S_ISDIR(fp->mode)) {
@@ -468,7 +463,6 @@ static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
        struct file_list *dirlist;
        char delbuf[MAXPATHLEN];
        int dlen, i;
-       int save_uid_ndx = uid_ndx;
 
        if (!fbuf) {
                change_local_filter_dir(NULL, 0, 0);
@@ -500,9 +494,6 @@ static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
                        return;
        }
 
-       if (!uid_ndx)
-               uid_ndx = ++file_extra_cnt;
-
        dirlist = get_dirlist(fbuf, dlen, 0);
 
        /* If an item in dirlist is not found in flist, delete it
@@ -517,9 +508,12 @@ static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
                                        f_name(fp, NULL));
                        continue;
                }
-               if (flist_find(cur_flist, fp) < 0) {
+               /* Here we want to match regardless of file type.  Replacement
+                * of a file with one of another type is handled separately by
+                * a delete_item call with a DEL_MAKE_ROOM flag. */
+               if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
                        int flags = DEL_RECURSE;
-                       if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
+                       if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
                                flags |= DEL_NO_UID_WRITE;
                        f_name(fp, delbuf);
                        if (delete_during == 2) {
@@ -531,11 +525,6 @@ static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
        }
 
        flist_free(dirlist);
-
-       if (!save_uid_ndx) {
-               --file_extra_cnt;
-               uid_ndx = 0;
-       }
 }
 
 /* This deletes any files on the receiving side that are not present on the
@@ -553,10 +542,13 @@ static void do_delete_pass(void)
        for (j = 0; j < cur_flist->used; j++) {
                struct file_struct *file = cur_flist->sorted[j];
 
-               if (!(file->flags & FLAG_CONTENT_DIR))
+               f_name(file, fbuf);
+
+               if (!(file->flags & FLAG_CONTENT_DIR)) {
+                       change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
                        continue;
+               }
 
-               f_name(file, fbuf);
                if (verbose > 1 && file->flags & FLAG_TOP_DIR)
                        rprintf(FINFO, "deleting in %s\n", fbuf);
 
@@ -690,8 +682,11 @@ void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statre
                        if (iflags & ITEM_XNAME_FOLLOWS)
                                write_vstring(sock_f_out, xname, strlen(xname));
 #ifdef SUPPORT_XATTRS
-                       if (iflags & ITEM_REPORT_XATTR && !dry_run)
-                               send_xattr_request(NULL, file, sock_f_out);
+                       if (preserve_xattrs && do_xfers
+                        && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
+                               send_xattr_request(NULL, file,
+                                       iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
+                       }
 #endif
                } else if (ndx >= 0) {
                        enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
@@ -746,18 +741,25 @@ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 {
        int32 blength;
        int s2length;
+       int64 l;
+
+       if (len < 0) {
+               /* The file length overflowed our int64 var, so we can't process this file. */
+               sum->count = -1; /* indicate overflow error */
+               return;
+       }
 
        if (block_size)
                blength = block_size;
        else if (len <= BLOCK_SIZE * BLOCK_SIZE)
                blength = BLOCK_SIZE;
        else {
+               int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
                int32 c;
-               int64 l;
                int cnt;
                for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
-               if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
-                       blength = MAX_BLOCK_SIZE;
+               if (c < 0 || c >= max_blength)
+                       blength = max_blength;
                else {
                    blength = 0;
                    do {
@@ -776,7 +778,6 @@ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
                s2length = SUM_LENGTH;
        } else {
                int32 c;
-               int64 l;
                int b = BLOCKSUM_BIAS;
                for (l = len; l >>= 1; b += 2) {}
                for (c = blength; (c >>= 1) && b; b--) {}
@@ -790,7 +791,10 @@ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
        sum->blength    = blength;
        sum->s2length   = s2length;
        sum->remainder  = (int32)(len % blength);
-       sum->count      = (int32)(len / blength) + (sum->remainder != 0);
+       sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
+
+       if ((int64)sum->count != l)
+               sum->count = -1;
 
        if (sum->count && verbose > 2) {
                rprintf(FINFO,
@@ -806,7 +810,7 @@ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
  *
  * Generate approximately one checksum every block_len bytes.
  */
-static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
+static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 {
        int32 i;
        struct map_struct *mapbuf;
@@ -814,10 +818,12 @@ static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
        OFF_T offset = 0;
 
        sum_sizes_sqroot(&sum, len);
+       if (sum.count < 0)
+               return -1;
        write_sum_head(f_out, &sum);
 
        if (append_mode > 0 && f_copy < 0)
-               return;
+               return 0;
 
        if (len > 0)
                mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
@@ -854,6 +860,8 @@ static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 
        if (mapbuf)
                unmap_file(mapbuf);
+
+       return 0;
 }
 
 
@@ -915,6 +923,7 @@ static int copy_altdest_file(const char *src, const char *dest, struct file_stru
 {
        char buf[MAXPATHLEN];
        const char *copy_to, *partialptr;
+       int save_preserve_xattrs = preserve_xattrs;
        int ok, fd_w;
 
        if (inplace) {
@@ -939,7 +948,9 @@ static int copy_altdest_file(const char *src, const char *dest, struct file_stru
                return -1;
        }
        partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
+       preserve_xattrs = 0; /* xattrs were copied with file */
        ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
+       preserve_xattrs = save_preserve_xattrs;
        cleanup_disable();
        return ok ? 0 : -1;
 }
@@ -1101,8 +1112,8 @@ static int try_dests_non(struct file_struct *file, char *fname, int ndx,
                }
                switch (type) {
                case TYPE_DIR:
-                       break;
                case TYPE_SPECIAL:
+                       break;
                case TYPE_DEVICE:
                        devp = F_RDEV_P(file);
                        if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
@@ -1209,22 +1220,34 @@ static void list_file_entry(struct file_struct *f)
 static int phase = 0;
 static int dflt_perms;
 
+static int implied_dirs_are_missing;
+/* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
+static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
+{
+       return F_DEPTH(file) > F_DEPTH(subtree)
+               && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
+}
+
 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
  * make sure it exists, and has the right permissions/timestamp info.  For
  * all other non-regular files (symlinks, etc.) we create them here.  For
  * regular files that have changed, we try to find a basis file and then
  * start sending checksums.  The ndx is the file's unique index value.
  *
- * When fname is non-null, it must point to a MAXPATHLEN buffer!
+ * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
+ * passed to delete_item(), which can use it during a recursive delete.)
  *
  * Note that f_out is set to -1 when doing final directory-permission and
  * modification-time repair. */
 static void recv_generator(char *fname, struct file_struct *file, int ndx,
                           int itemizing, enum logcode code, int f_out)
 {
-       static int missing_below = -1, excluded_below = -1;
        static const char *parent_dirname = "";
-       static struct file_struct *missing_dir = NULL, *excluded_dir = NULL;
+       /* Missing dir not created due to --dry-run; will still be scanned. */
+       static struct file_struct *dry_missing_dir = NULL;
+       /* Missing dir whose contents are skipped altogether due to
+        * --ignore-non-existing, daemon exclude, or mkdir failure. */
+       static struct file_struct *skip_dir = NULL;
        static struct file_list *fuzzy_dirlist = NULL;
        static int need_fuzzy_dirlist = 0;
        struct file_struct *fuzzy_file = NULL;
@@ -1236,7 +1259,6 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
        char *fnamecmp, *partialptr, *backupptr = NULL;
        char fnamecmpbuf[MAXPATHLEN];
        uchar fnamecmp_type;
-       int implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
        int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
        int is_dir = !S_ISDIR(file->mode) ? 0
                   : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
@@ -1253,48 +1275,44 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                return;
        }
 
-       if (server_filter_list.head) {
-               int filtered = check_filter(&server_filter_list, fname, is_dir) < 0;
-               if (is_dir < 0 && filtered)
-                       return;
-               if (excluded_below >= 0) {
-                       if (F_DEPTH(file) > excluded_below
-                        && (!implied_dirs_are_missing || f_name_has_prefix(file, excluded_dir)))
-                               goto skipping;
-                       excluded_below = -1;
-               }
-               if (filtered) {
-                       if (is_dir) {
-                               excluded_below = F_DEPTH(file);
-                               excluded_dir = file;
-                       }
-                 skipping:
-                       rprintf(FERROR_XFER,
-                               "skipping daemon-excluded file \"%s\"\n",
-                               fname);
-                       return;
-               }
-       }
-
-       if (missing_below >= 0) {
-               if (F_DEPTH(file) <= missing_below
-                || (implied_dirs_are_missing && !f_name_has_prefix(file, missing_dir))) {
-                       if (dry_run)
-                               dry_run--;
-                       missing_below = -1;
-               } else if (!dry_run) {
+       if (skip_dir) {
+               if (is_below(file, skip_dir)) {
                        if (is_dir)
                                file->flags |= FLAG_MISSING_DIR;
+#ifdef SUPPORT_HARD_LINKS
+                       else if (F_IS_HLINKED(file))
+                               handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
                        return;
                }
+               skip_dir = NULL;
        }
+
 #ifdef SUPPORT_ACLS
        sx.acc_acl = sx.def_acl = NULL;
 #endif
 #ifdef SUPPORT_XATTRS
        sx.xattr = NULL;
 #endif
-       if (dry_run > 1) {
+       if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
+               if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
+                       if (is_dir < 0)
+                               return;
+#ifdef SUPPORT_HARD_LINKS
+                       if (F_IS_HLINKED(file))
+                               handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
+                       rprintf(FERROR_XFER,
+                               "skipping daemon-excluded %s \"%s\"\n",
+                               is_dir ? "directory" : "file", fname);
+                       if (is_dir)
+                               goto skipping_dir_contents;
+                       return;
+               }
+       }
+
+       if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
+         parent_is_dry_missing:
                if (fuzzy_dirlist) {
                        flist_free(fuzzy_dirlist);
                        fuzzy_dirlist = NULL;
@@ -1304,13 +1322,17 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                stat_errno = ENOENT;
        } else {
                const char *dn = file->dirname ? file->dirname : ".";
+               dry_missing_dir = NULL;
                if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
                        if (relative_paths && !implied_dirs
-                        && do_stat(dn, &sx.st) < 0
-                        && create_directory_path(fname) < 0) {
-                               rsyserr(FERROR_XFER, errno,
-                                       "recv_generator: mkdir %s failed",
-                                       full_fname(dn));
+                        && do_stat(dn, &sx.st) < 0) {
+                               if (dry_run)
+                                       goto parent_is_dry_missing;
+                               if (create_directory_path(fname) < 0) {
+                                       rsyserr(FERROR_XFER, errno,
+                                               "recv_generator: mkdir %s failed",
+                                               full_fname(dn));
+                               }
                        }
                        if (fuzzy_dirlist) {
                                flist_free(fuzzy_dirlist);
@@ -1327,7 +1349,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 
                if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
                        strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
-                       fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
+                       fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
                        need_fuzzy_dirlist = 0;
                }
 
@@ -1339,14 +1361,13 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                if (is_dir) {
                        if (is_dir < 0)
                                return;
-                       if (missing_below < 0) {
-                               if (dry_run)
-                                       dry_run++;
-                               missing_below = F_DEPTH(file);
-                               missing_dir = file;
-                       }
+                       skip_dir = file;
                        file->flags |= FLAG_MISSING_DIR;
                }
+#ifdef SUPPORT_HARD_LINKS
+               else if (F_IS_HLINKED(file))
+                       handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
                if (verbose > 1) {
                        rprintf(FINFO, "not creating new %s \"%s\"\n",
                                is_dir ? "directory" : "file", fname);
@@ -1362,12 +1383,25 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
         && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
                if (verbose > 1 && is_dir >= 0)
                        rprintf(FINFO, "%s exists\n", fname);
+#ifdef SUPPORT_HARD_LINKS
+               if (F_IS_HLINKED(file))
+                       handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
                goto cleanup;
        }
 
+       fnamecmp = fname;
+
        if (is_dir) {
+               mode_t added_perms;
                if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
                        goto cleanup;
+               if (am_root < 0) {
+                       /* For --fake-super, the dir must be useable by the copying
+                        * user, just like it would be for root. */
+                       added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
+               } else
+                       added_perms = 0;
                if (is_dir < 0) {
                        /* In inc_recurse mode we want to make sure any missing
                         * directories get created while we're still processing
@@ -1378,7 +1412,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                         && (S_ISDIR(sx.st.st_mode)
                          || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
                                goto cleanup; /* Any errors get reported later. */
-                       if (do_mkdir(fname, file->mode & 0700) == 0)
+                       if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
                                file->flags |= FLAG_DIR_CREATED;
                        goto cleanup;
                }
@@ -1392,10 +1426,10 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                                goto skipping_dir_contents;
                        statret = -1;
                }
-               if (dry_run && statret != 0 && missing_below < 0) {
-                       missing_below = F_DEPTH(file);
-                       missing_dir = file;
-                       dry_run++;
+               if (dry_run && statret != 0) {
+                       if (!dry_missing_dir)
+                               dry_missing_dir = file;
+                       file->flags |= FLAG_MISSING_DIR;
                }
                real_ret = statret;
                real_sx = sx;
@@ -1411,29 +1445,35 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                        if (j == -2) {
                                itemizing = 0;
                                code = FNONE;
-                       } else if (j >= 0)
                                statret = 1;
+                       } else if (j >= 0) {
+                               statret = 1;
+                               fnamecmp = fnamecmpbuf;
+                       }
                }
                if (itemizing && f_out != -1) {
-                       itemize(fname, file, ndx, statret, &sx,
+                       itemize(fnamecmp, file, ndx, statret, &sx,
                                statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
                }
-               if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
+               if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
                        if (!relative_paths || errno != ENOENT
-                           || create_directory_path(fname) < 0
-                           || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
+                        || create_directory_path(fname) < 0
+                        || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
                                rsyserr(FERROR_XFER, errno,
                                        "recv_generator: mkdir %s failed",
                                        full_fname(fname));
                          skipping_dir_contents:
                                rprintf(FERROR,
                                    "*** Skipping any contents from this failed directory ***\n");
-                               missing_below = F_DEPTH(file);
-                               missing_dir = file;
+                               skip_dir = file;
                                file->flags |= FLAG_MISSING_DIR;
                                goto cleanup;
                        }
                }
+#ifdef SUPPORT_XATTRS
+               if (preserve_xattrs && statret == 1)
+                       copy_xattrs(fnamecmpbuf, fname);
+#endif
                if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
                    && verbose && code != FNONE && f_out != -1)
                        rprintf(code, "%s/\n", fname);
@@ -1462,9 +1502,13 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                                DEV_MINOR(devp) = minor(real_sx.st.st_dev);
                        }
                }
-               else if (delete_during && f_out != -1 && !phase && dry_run < 2
-                   && (file->flags & FLAG_CONTENT_DIR))
-                       delete_in_dir(fname, file, &real_sx.st.st_dev);
+               else if (delete_during && f_out != -1 && !phase
+                   && !(file->flags & FLAG_MISSING_DIR)) {
+                       if (file->flags & FLAG_CONTENT_DIR)
+                               delete_in_dir(fname, file, &real_sx.st.st_dev);
+                       else
+                               change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
+               }
                goto cleanup;
        }
 
@@ -1487,11 +1531,14 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                const char *sl = F_SYMLINK(file);
                if (safe_symlinks && unsafe_symlink(sl, fname)) {
                        if (verbose) {
-                               if (solo_file)
+                               if (solo_file) {
+                                       /* fname contains the destination path, but we
+                                        * want to report the source path. */
                                        fname = f_name(file, NULL);
+                               }
                                rprintf(FINFO,
-                                       "ignoring unsafe symlink %s -> \"%s\"\n",
-                                       full_fname(fname), sl);
+                                       "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
+                                       fname, sl);
                        }
                        return;
                }
@@ -1568,8 +1615,12 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 
        if ((am_root && preserve_devices && IS_DEVICE(file->mode))
         || (preserve_specials && IS_SPECIAL(file->mode))) {
-               uint32 *devp = F_RDEV_P(file);
-               dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
+               dev_t rdev;
+               if (IS_DEVICE(file->mode)) {
+                       uint32 *devp = F_RDEV_P(file);
+                       rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
+               } else
+                       rdev = 0;
                if (statret == 0) {
                        int del_for_flag;
                        if (IS_DEVICE(file->mode)) {
@@ -1583,7 +1634,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                        }
                        if (statret == 0
                         && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
-                        && sx.st.st_rdev == rdev) {
+                        && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
                                /* The device or special file is identical. */
                                set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
                                if (itemizing)
@@ -1674,10 +1725,13 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
            && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
                if (verbose > 1)
                        rprintf(FINFO, "%s is newer\n", fname);
+#ifdef SUPPORT_HARD_LINKS
+               if (F_IS_HLINKED(file))
+                       handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
                goto cleanup;
        }
 
-       fnamecmp = fname;
        fnamecmp_type = FNAMECMP_FNAME;
 
        if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
@@ -1713,7 +1767,7 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
        } else
                partialptr = NULL;
 
-       if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
+       if (statret != 0 && fuzzy_dirlist) {
                int j = find_fuzzy(file, fuzzy_dirlist);
                if (j >= 0) {
                        fuzzy_file = fuzzy_dirlist->files[j];
@@ -1768,6 +1822,10 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
        }
 
        if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
+#ifdef SUPPORT_HARD_LINKS
+               if (F_IS_HLINKED(file))
+                       handle_skipped_hlink(file, itemizing, code, f_out);
+#endif
                goto cleanup;
        }
 
@@ -1836,15 +1894,21 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
                        close(fd);
                        goto cleanup;
                }
-               if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
-                && (errno != ENOENT || make_bak_dir(backupptr) < 0
-                 || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
-                       rsyserr(FERROR_XFER, errno, "open %s",
-                               full_fname(backupptr));
-                       unmake_file(back_file);
-                       back_file = NULL;
-                       close(fd);
-                       goto cleanup;
+               if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
+                       int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
+                       if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
+                               if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
+                                       save_errno = errno ? errno : save_errno;
+                               else
+                                       save_errno = 0;
+                       }
+                       if (save_errno) {
+                               rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
+                               unmake_file(back_file);
+                               back_file = NULL;
+                               close(fd);
+                               goto cleanup;
+                       }
                }
                fnamecmp_type = FNAMECMP_BACKUP;
        }
@@ -1899,16 +1963,32 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
 
        if (statret != 0 || whole_file)
                write_sum_head(f_out, NULL);
-       else {
-               generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
+       else if (sx.st.st_size <= 0) {
+               write_sum_head(f_out, NULL);
+               close(fd);
+       } else {
+               if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
+                       rprintf(FWARNING,
+                           "WARNING: file is too large for checksum sending: %s\n",
+                           fnamecmp);
+                       write_sum_head(f_out, NULL);
+               }
                close(fd);
        }
 
   cleanup:
        if (back_file) {
+               int save_preserve_xattrs = preserve_xattrs;
                if (f_copy >= 0)
                        close(f_copy);
+#ifdef SUPPORT_XATTRS
+               if (preserve_xattrs) {
+                       copy_xattrs(fname, backupptr);
+                       preserve_xattrs = 0;
+               }
+#endif
                set_file_attrs(backupptr, back_file, NULL, NULL, 0);
+               preserve_xattrs = save_preserve_xattrs;
                if (verbose > 1) {
                        rprintf(FINFO, "backed up %s to %s\n",
                                fname, backupptr);
@@ -1927,11 +2007,34 @@ static void recv_generator(char *fname, struct file_struct *file, int ndx,
        return;
 }
 
+#ifdef SUPPORT_HARD_LINKS
+static void handle_skipped_hlink(struct file_struct *file, int itemizing,
+                                enum logcode code, int f_out)
+{
+       char fbuf[MAXPATHLEN];
+       int new_last_ndx;
+       struct file_list *save_flist = cur_flist;
+
+       /* If we skip the last item in a chain of links and there was a
+        * prior non-skipped hard-link waiting to finish, finish it now. */
+       if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
+               return;
+
+       file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
+       cur_flist->in_progress--; /* undo prior increment */
+       f_name(file, fbuf);
+       recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
+
+       cur_flist = save_flist;
+}
+#endif
+
 static void touch_up_dirs(struct file_list *flist, int ndx)
 {
        static int counter = 0;
        struct file_struct *file;
        char *fname;
+       BOOL fix_dir_perms;
        int i, start, end;
 
        if (ndx < 0) {
@@ -1952,11 +2055,13 @@ static void touch_up_dirs(struct file_list *flist, int ndx)
                        rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
                                NS(fname), i);
                }
+               /* Be sure not to retouch permissions with --fake-super. */
+               fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
                if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
-                || (!need_retouch_dir_times && file->mode & S_IWUSR))
+                || !(need_retouch_dir_times || fix_dir_perms))
                        continue;
                fname = f_name(file, NULL);
-               if (!(file->mode & S_IWUSR))
+               if (fix_dir_perms)
                        do_chmod(fname, file->mode);
                if (need_retouch_dir_times) {
                        STRUCT_STAT st;
@@ -1964,10 +2069,13 @@ static void touch_up_dirs(struct file_list *flist, int ndx)
                         && cmp_time(st.st_mtime, file->modtime) != 0)
                                set_modtime(fname, file->modtime, file->mode);
                }
-               if (allowed_lull && !(counter % lull_mod))
-                       maybe_send_keepalive();
-               else if (!(counter & 0xFF))
-                       maybe_flush_socket(0);
+               if (counter >= loopchk_limit) {
+                       if (allowed_lull)
+                               maybe_send_keepalive();
+                       else
+                               maybe_flush_socket(0);
+                       counter = 0;
+               }
        }
 }
 
@@ -1981,8 +2089,7 @@ void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
        while (1) {
 #ifdef SUPPORT_HARD_LINKS
                if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
-                       flist = flist_for_ndx(ndx);
-                       assert(flist != NULL);
+                       flist = flist_for_ndx(ndx, "check_for_finished_files.1");
                        file = flist->files[ndx - flist->ndx_start];
                        assert(file->flags & FLAG_HLINKED);
                        finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
@@ -2005,7 +2112,7 @@ void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
                        ignore_times++;
 
                        flist = cur_flist;
-                       cur_flist = flist_for_ndx(ndx);
+                       cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
 
                        file = cur_flist->files[ndx - cur_flist->ndx_start];
                        if (solo_file)
@@ -2038,10 +2145,9 @@ void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
                if (first_flist->in_progress || first_flist->to_redo)
                        break;
 
-               if (!read_batch) {
-                       write_ndx(sock_f_out, NDX_DONE);
+               write_ndx(sock_f_out, NDX_DONE);
+               if (!read_batch)
                        maybe_flush_socket(1);
-               }
 
                if (delete_during == 2 || !dir_tweaking) {
                        /* Skip directory touch-up. */
@@ -2054,7 +2160,7 @@ void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
 
 void generate_files(int f_out, const char *local_name)
 {
-       int i, ndx;
+       int i, ndx, next_loopchk = 0;
        char fbuf[MAXPATHLEN];
        int itemizing;
        enum logcode code;
@@ -2080,9 +2186,10 @@ void generate_files(int f_out, const char *local_name)
        solo_file = local_name;
        dir_tweaking = !(list_only || solo_file || dry_run);
        need_retouch_dir_times = preserve_times > 1;
-       lull_mod = allowed_lull * 5;
+       loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
        symlink_timeset_failed_flags = ITEM_REPORT_TIME
            | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
+       implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
 
        if (verbose > 2)
                rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
@@ -2109,7 +2216,7 @@ void generate_files(int f_out, const char *local_name)
        /* Since we often fill up the outgoing socket and then just sit around
         * waiting for the other 2 processes to do their thing, we don't want
         * to exit on a timeout.  If the data stops flowing, the receiver will
-        * notice that and let us know via the redo pipe (or its closing). */
+        * notice that and let us know via the message pipe (or its closing). */
        ignore_timeout = 1;
 
        dflt_perms = (ACCESSPERMS & ~orig_umask);
@@ -2124,19 +2231,24 @@ void generate_files(int f_out, const char *local_name)
 
                if (inc_recurse && cur_flist->parent_ndx >= 0) {
                        struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
-                       f_name(fp, fbuf);
+                       if (solo_file)
+                               strlcpy(fbuf, solo_file, sizeof fbuf);
+                       else
+                               f_name(fp, fbuf);
                        ndx = cur_flist->ndx_start - 1;
                        recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
-                       if (delete_during && dry_run < 2 && !list_only) {
-                               if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
+                       if (delete_during && dry_run < 2 && !list_only
+                        && !(fp->flags & FLAG_MISSING_DIR)) {
+                               if (fp->flags & FLAG_CONTENT_DIR) {
                                        dev_t dirdev;
                                        if (one_file_system) {
                                                uint32 *devp = F_DIR_DEV_P(fp);
                                                dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
                                        } else
                                                dirdev = MAKEDEV(0, 0);
-                                       delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
-                               }
+                                       delete_in_dir(fbuf, fp, &dirdev);
+                               } else
+                                       change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
                        }
                }
                for (i = cur_flist->low; i <= cur_flist->high; i++) {
@@ -2158,10 +2270,13 @@ void generate_files(int f_out, const char *local_name)
 
                        check_for_finished_files(itemizing, code, 0);
 
-                       if (allowed_lull && !(i % lull_mod))
-                               maybe_send_keepalive();
-                       else if (!(i & 0xFF))
-                               maybe_flush_socket(0);
+                       if (i + cur_flist->ndx_start >= next_loopchk) {
+                               if (allowed_lull)
+                                       maybe_send_keepalive();
+                               else
+                                       maybe_flush_socket(0);
+                               next_loopchk += loopchk_limit;
+                       }
                }
 
                if (!inc_recurse) {
@@ -2195,6 +2310,7 @@ void generate_files(int f_out, const char *local_name)
                rprintf(FINFO, "generate_files phase=%d\n", phase);
 
        write_ndx(f_out, NDX_DONE);
+
        /* Reduce round-trip lag-time for a useless delay-updates phase. */
        if (protocol_version >= 29 && !delay_updates)
                write_ndx(f_out, NDX_DONE);
@@ -2229,7 +2345,7 @@ void generate_files(int f_out, const char *local_name)
                touch_up_dirs(dir_flist, -1);
 
        if (max_delete >= 0 && deletion_count > max_delete) {
-               rprintf(FINFO,
+               rprintf(FWARNING,
                        "Deletions stopped due to --max-delete limit (%d skipped)\n",
                        deletion_count - max_delete);
                io_error |= IOERR_DEL_LIMIT;