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-rw-r--r--include/erofs/exclude.h27
-rw-r--r--lib/Makefile.am2
-rw-r--r--lib/exclude.c142
-rw-r--r--lib/inode.c5
-rw-r--r--man/mkfs.erofs.18
-rw-r--r--mkfs/main.c36
6 files changed, 212 insertions, 8 deletions
diff --git a/include/erofs/exclude.h b/include/erofs/exclude.h
new file mode 100644
index 0000000..88c55d7
--- /dev/null
+++ b/include/erofs/exclude.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * erofs-utils/include/erofs/exclude.h
+ *
+ * Created by Li Guifu <bluce.lee@aliyun.com>
+ */
+#ifndef __EROFS_EXCLUDE_H
+#define __EROFS_EXCLUDE_H
+
+#include <sys/types.h>
+#include <regex.h>
+
+struct erofs_exclude_rule {
+ struct list_head list;
+
+ char *pattern;
+ regex_t reg;
+};
+
+void erofs_exclude_set_root(const char *rootdir);
+void erofs_cleanup_exclude_rules(void);
+
+int erofs_parse_exclude_path(const char *args, bool is_regex);
+struct erofs_exclude_rule *erofs_is_exclude_path(const char *dir,
+ const char *name);
+#endif
+
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 1ff81f9..e4b51e6 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -3,7 +3,7 @@
noinst_LTLIBRARIES = liberofs.la
liberofs_la_SOURCES = config.c io.c cache.c inode.c xattr.c \
- compress.c compressor.c
+ compress.c compressor.c exclude.c
liberofs_la_CFLAGS = -Wall -Werror -I$(top_srcdir)/include
if ENABLE_LZ4
liberofs_la_CFLAGS += ${LZ4_CFLAGS}
diff --git a/lib/exclude.c b/lib/exclude.c
new file mode 100644
index 0000000..47b467d
--- /dev/null
+++ b/lib/exclude.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * erofs-utils/lib/exclude.c
+ *
+ * Created by Li Guifu <bluce.lee@aliyun.com>
+ */
+#include <string.h>
+#include <stdlib.h>
+#include "erofs/err.h"
+#include "erofs/list.h"
+#include "erofs/print.h"
+#include "erofs/exclude.h"
+
+#define EXCLUDE_RULE_EXACT_SIZE offsetof(struct erofs_exclude_rule, reg)
+#define EXCLUDE_RULE_REGEX_SIZE sizeof(struct erofs_exclude_rule)
+
+static LIST_HEAD(exclude_head);
+static LIST_HEAD(regex_exclude_head);
+
+static unsigned int rpathlen; /* root directory prefix length */
+
+void erofs_exclude_set_root(const char *rootdir)
+{
+ rpathlen = strlen(rootdir);
+}
+
+static void dump_regerror(int errcode, const char *s, const regex_t *preg)
+{
+ char str[512];
+
+ regerror(errcode, preg, str, sizeof(str));
+ erofs_err("invalid regex %s (%s)\n", s, str);
+}
+
+static struct erofs_exclude_rule *erofs_insert_exclude(const char *s,
+ bool is_regex)
+{
+ struct erofs_exclude_rule *r;
+ int ret;
+ struct list_head *h;
+
+ r = malloc(is_regex ? EXCLUDE_RULE_REGEX_SIZE :
+ EXCLUDE_RULE_EXACT_SIZE);
+ if (!r)
+ return ERR_PTR(-ENOMEM);
+
+ r->pattern = strdup(s);
+ if (!r->pattern) {
+ ret = -ENOMEM;
+ goto err_rule;
+ }
+
+ if (is_regex) {
+ ret = regcomp(&r->reg, s, REG_EXTENDED|REG_NOSUB);
+ if (ret) {
+ dump_regerror(ret, s, &r->reg);
+ goto err_rule;
+ }
+ h = &regex_exclude_head;
+ } else {
+ h = &exclude_head;
+ }
+
+ list_add_tail(&r->list, h);
+ erofs_info("insert exclude %s: %s\n",
+ is_regex ? "regex" : "path", s);
+ return r;
+
+err_rule:
+ if (r->pattern)
+ free(r->pattern);
+ free(r);
+ return ERR_PTR(ret);
+}
+
+void erofs_cleanup_exclude_rules(void)
+{
+ struct erofs_exclude_rule *r, *n;
+ struct list_head *h;
+
+ h = &exclude_head;
+ list_for_each_entry_safe(r, n, h, list) {
+ list_del(&r->list);
+ free(r->pattern);
+ free(r);
+ }
+
+ h = &regex_exclude_head;
+ list_for_each_entry_safe(r, n, h, list) {
+ list_del(&r->list);
+ free(r->pattern);
+ regfree(&r->reg);
+ free(r);
+ }
+}
+
+int erofs_parse_exclude_path(const char *args, bool is_regex)
+{
+ struct erofs_exclude_rule *r = erofs_insert_exclude(args, is_regex);
+
+ if (IS_ERR(r)) {
+ erofs_cleanup_exclude_rules();
+ return PTR_ERR(r);
+ }
+ return 0;
+}
+
+struct erofs_exclude_rule *erofs_is_exclude_path(const char *dir,
+ const char *name)
+{
+ char buf[PATH_MAX];
+ const char *s;
+ struct erofs_exclude_rule *r;
+
+ if (!dir) {
+ /* no prefix */
+ s = name;
+ } else {
+ sprintf(buf, "%s/%s", dir, name);
+ s = buf;
+ }
+
+ s += rpathlen;
+ while (*s == '/')
+ s++;
+
+ list_for_each_entry(r, &exclude_head, list) {
+ if (!strcmp(r->pattern, s))
+ return r;
+ }
+
+ list_for_each_entry(r, &regex_exclude_head, list) {
+ int ret = regexec(&r->reg, s, (size_t)0, NULL, 0);
+
+ if (!ret)
+ return r;
+ if (ret != REG_NOMATCH)
+ dump_regerror(ret, s, &r->reg);
+ }
+ return NULL;
+}
+
diff --git a/lib/inode.c b/lib/inode.c
index bd0652b..7114023 100644
--- a/lib/inode.c
+++ b/lib/inode.c
@@ -20,6 +20,7 @@
#include "erofs/io.h"
#include "erofs/compress.h"
#include "erofs/xattr.h"
+#include "erofs/exclude.h"
struct erofs_sb_info sbi;
@@ -877,6 +878,10 @@ struct erofs_inode *erofs_mkfs_build_tree(struct erofs_inode *dir)
!strncmp(dp->d_name, "lost+found", strlen("lost+found")))
continue;
+ /* skip if it's a exclude file */
+ if (erofs_is_exclude_path(dir->i_srcpath, dp->d_name))
+ continue;
+
d = erofs_d_alloc(dir, dp->d_name);
if (IS_ERR(d)) {
ret = PTR_ERR(d);
diff --git a/man/mkfs.erofs.1 b/man/mkfs.erofs.1
index d6bf828..d47207a 100644
--- a/man/mkfs.erofs.1
+++ b/man/mkfs.erofs.1
@@ -52,6 +52,14 @@ Forcely generate extended inodes (64-byte inodes) to output.
Set all files to the given UNIX timestamp. Reproducible builds requires setting
all to a specific one.
.TP
+.BI "\-\-exclude-path=" path
+Ignore file that matches the exact literal path.
+You may give multiple `--exclude-path' options.
+.TP
+.BI "\-\-exclude-regex=" regex
+Ignore files that match the given regular expression.
+You may give multiple `--exclude-regex` options.
+.TP
.B \-\-help
Display this help and exit.
.SH AUTHOR
diff --git a/mkfs/main.c b/mkfs/main.c
index 817a6c1..940d4e8 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -21,6 +21,7 @@
#include "erofs/io.h"
#include "erofs/compress.h"
#include "erofs/xattr.h"
+#include "erofs/exclude.h"
#ifdef HAVE_LIBUUID
#include <uuid/uuid.h>
@@ -30,6 +31,8 @@
static struct option long_options[] = {
{"help", no_argument, 0, 1},
+ {"exclude-path", required_argument, NULL, 2},
+ {"exclude-regex", required_argument, NULL, 3},
{0, 0, 0, 0},
};
@@ -50,12 +53,14 @@ static void usage(void)
{
fputs("usage: [options] FILE DIRECTORY\n\n"
"Generate erofs image from DIRECTORY to FILE, and [options] are:\n"
- " -zX[,Y] X=compressor (Y=compression level, optional)\n"
- " -d# set output message level to # (maximum 9)\n"
- " -x# set xattr tolerance to # (< 0, disable xattrs; default 2)\n"
- " -EX[,...] X=extended options\n"
- " -T# set a fixed UNIX timestamp # to all files\n"
- " --help display this help and exit\n"
+ " -zX[,Y] X=compressor (Y=compression level, optional)\n"
+ " -d# set output message level to # (maximum 9)\n"
+ " -x# set xattr tolerance to # (< 0, disable xattrs; default 2)\n"
+ " -EX[,...] X=extended options\n"
+ " -T# set a fixed UNIX timestamp # to all files\n"
+ " --exclude-path=X avoid including file X (X = exact literal path)\n"
+ " --exclude-regex=X avoid including files that match X (X = regular expression)\n"
+ " --help display this help and exit\n"
"\nAvailable compressors are: ", stderr);
print_available_compressors(stderr, ", ");
}
@@ -177,7 +182,22 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
return -EINVAL;
}
break;
-
+ case 2:
+ opt = erofs_parse_exclude_path(optarg, false);
+ if (opt) {
+ erofs_err("failed to parse exclude path: %s",
+ erofs_strerror(opt));
+ return opt;
+ }
+ break;
+ case 3:
+ opt = erofs_parse_exclude_path(optarg, true);
+ if (opt) {
+ erofs_err("failed to parse exclude regex: %s",
+ erofs_strerror(opt));
+ return opt;
+ }
+ break;
case 1:
usage();
exit(0);
@@ -372,6 +392,7 @@ int main(int argc, char **argv)
}
erofs_show_config();
+ erofs_exclude_set_root(cfg.c_src_path);
sb_bh = erofs_buffer_init();
if (IS_ERR(sb_bh)) {
@@ -428,6 +449,7 @@ int main(int argc, char **argv)
exit:
z_erofs_compress_exit();
dev_close();
+ erofs_cleanup_exclude_rules();
erofs_exit_configure();
if (err) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-16 19:40:18 +0000