diff --git a/dir.c b/dir.c index a9dc79e0e6d4..f8a04e16dc88 100644 --- a/dir.c +++ b/dir.c @@ -425,11 +425,13 @@ static void exfat_set_entry_type(struct exfat_dentry *ep, unsigned int type) } static void exfat_init_stream_entry(struct exfat_dentry *ep, - unsigned char flags, unsigned int start_clu, - unsigned long long size) + unsigned int start_clu, unsigned long long size) { exfat_set_entry_type(ep, TYPE_STREAM); - ep->dentry.stream.flags = flags; + if (size == 0) + ep->dentry.stream.flags = ALLOC_FAT_CHAIN; + else + ep->dentry.stream.flags = ALLOC_NO_FAT_CHAIN; ep->dentry.stream.start_clu = cpu_to_le32(start_clu); ep->dentry.stream.valid_size = cpu_to_le64(size); ep->dentry.stream.size = cpu_to_le64(size); @@ -505,9 +507,7 @@ int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir, if (!ep) return -EIO; - exfat_init_stream_entry(ep, - (type == TYPE_FILE) ? ALLOC_FAT_CHAIN : ALLOC_NO_FAT_CHAIN, - start_clu, size); + exfat_init_stream_entry(ep, start_clu, size); exfat_update_bh(bh, IS_DIRSYNC(inode)); brelse(bh); diff --git a/exfat_fs.h b/exfat_fs.h index 97ee6843c17e..311d9f28e25f 100644 --- a/exfat_fs.h +++ b/exfat_fs.h @@ -259,6 +259,8 @@ struct exfat_mount_options { discard:1, /* Issue discard requests on deletions */ keep_last_dots:1; /* Keep trailing periods in paths */ int time_offset; /* Offset of timestamps from UTC (in minutes) */ + /* Support creating zero-size directory, default: false */ + bool zero_size_dir; }; /* diff --git a/namei.c b/namei.c index 3429a8e47495..d43af646e229 100644 --- a/namei.c +++ b/namei.c @@ -545,7 +545,7 @@ static int exfat_add_entry(struct inode *inode, const char *path, goto out; } - if (type == TYPE_DIR) { + if (type == TYPE_DIR && !sbi->options.zero_size_dir) { ret = exfat_alloc_new_dir(inode, &clu); if (ret) goto out; @@ -578,7 +578,10 @@ static int exfat_add_entry(struct inode *inode, const char *path, info->num_subdirs = 0; } else { info->attr = ATTR_SUBDIR; - info->start_clu = start_clu; + if (sbi->options.zero_size_dir) + info->start_clu = EXFAT_EOF_CLUSTER; + else + info->start_clu = start_clu; info->size = clu_size; info->num_subdirs = EXFAT_MIN_SUBDIR; } diff --git a/super.c b/super.c index 665c296e4ad4..89f60d722c99 100644 --- a/super.c +++ b/super.c @@ -195,6 +195,8 @@ static int exfat_show_options(struct seq_file *m, struct dentry *root) seq_puts(m, ",sys_tz"); else if (opts->time_offset) seq_printf(m, ",time_offset=%d", opts->time_offset); + if (opts->zero_size_dir) + seq_puts(m, ",zero_size_dir"); return 0; } @@ -278,6 +280,7 @@ enum { Opt_keep_last_dots, Opt_sys_tz, Opt_time_offset, + Opt_zero_size_dir, /* Deprecated options */ Opt_utf8, @@ -323,6 +326,7 @@ static const struct fs_parameter_spec exfat_param_specs[] = { fsparam_flag("keep_last_dots", Opt_keep_last_dots), fsparam_flag("sys_tz", Opt_sys_tz), fsparam_s32("time_offset", Opt_time_offset), + fsparam_flag("zero_size_dir", Opt_zero_size_dir), __fsparam(NULL, "utf8", Opt_utf8, fs_param_deprecated, NULL), __fsparam(NULL, "debug", Opt_debug, fs_param_deprecated, @@ -403,6 +407,9 @@ static int exfat_parse_param(struct fs_context *fc, struct fs_parameter *param) return -EINVAL; opts->time_offset = result.int_32; break; + case Opt_zero_size_dir: + opts->zero_size_dir = true; + break; case Opt_utf8: case Opt_debug: case Opt_namecase: @@ -435,6 +442,7 @@ enum { Opt_debug, Opt_namecase, Opt_codepage, + Opt_zero_size_dir, Opt_fs, }; @@ -454,6 +462,7 @@ static const match_table_t exfat_tokens = { {Opt_namecase, "namecase=%u"}, {Opt_debug, "debug"}, {Opt_utf8, "utf8"}, + {Opt_zero_size_dir, "zero_size_dir"}, {Opt_err, NULL} }; @@ -545,6 +554,9 @@ static int parse_options(struct super_block *sb, char *options, int silent, case Opt_namecase: case Opt_codepage: break; + case Opt_zero_size_dir: + opts->zero_size_dir = true; + break; default: if (!silent) { exfat_err(sb,