[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/hfsplus/options.c b/src/kernel/linux/v4.14/fs/hfsplus/options.c
new file mode 100644
index 0000000..047e05c
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/hfsplus/options.c
@@ -0,0 +1,239 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hfsplus/options.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Option parsing
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/parser.h>
+#include <linux/nls.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include "hfsplus_fs.h"
+
+enum {
+ opt_creator, opt_type,
+ opt_umask, opt_uid, opt_gid,
+ opt_part, opt_session, opt_nls,
+ opt_nodecompose, opt_decompose,
+ opt_barrier, opt_nobarrier,
+ opt_force, opt_err
+};
+
+static const match_table_t tokens = {
+ { opt_creator, "creator=%s" },
+ { opt_type, "type=%s" },
+ { opt_umask, "umask=%o" },
+ { opt_uid, "uid=%u" },
+ { opt_gid, "gid=%u" },
+ { opt_part, "part=%u" },
+ { opt_session, "session=%u" },
+ { opt_nls, "nls=%s" },
+ { opt_decompose, "decompose" },
+ { opt_nodecompose, "nodecompose" },
+ { opt_barrier, "barrier" },
+ { opt_nobarrier, "nobarrier" },
+ { opt_force, "force" },
+ { opt_err, NULL }
+};
+
+/* Initialize an options object to reasonable defaults */
+void hfsplus_fill_defaults(struct hfsplus_sb_info *opts)
+{
+ if (!opts)
+ return;
+
+ opts->creator = HFSPLUS_DEF_CR_TYPE;
+ opts->type = HFSPLUS_DEF_CR_TYPE;
+ opts->umask = current_umask();
+ opts->uid = current_uid();
+ opts->gid = current_gid();
+ opts->part = -1;
+ opts->session = -1;
+}
+
+/* convert a "four byte character" to a 32 bit int with error checks */
+static inline int match_fourchar(substring_t *arg, u32 *result)
+{
+ if (arg->to - arg->from != 4)
+ return -EINVAL;
+ memcpy(result, arg->from, 4);
+ return 0;
+}
+
+int hfsplus_parse_options_remount(char *input, int *force)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+
+ if (!input)
+ return 1;
+
+ while ((p = strsep(&input, ",")) != NULL) {
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case opt_force:
+ *force = 1;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return 1;
+}
+
+/* Parse options from mount. Returns 0 on failure */
+/* input is the options passed to mount() as a string */
+int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int tmp, token;
+
+ if (!input)
+ goto done;
+
+ while ((p = strsep(&input, ",")) != NULL) {
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case opt_creator:
+ if (match_fourchar(&args[0], &sbi->creator)) {
+ pr_err("creator requires a 4 character value\n");
+ return 0;
+ }
+ break;
+ case opt_type:
+ if (match_fourchar(&args[0], &sbi->type)) {
+ pr_err("type requires a 4 character value\n");
+ return 0;
+ }
+ break;
+ case opt_umask:
+ if (match_octal(&args[0], &tmp)) {
+ pr_err("umask requires a value\n");
+ return 0;
+ }
+ sbi->umask = (umode_t)tmp;
+ break;
+ case opt_uid:
+ if (match_int(&args[0], &tmp)) {
+ pr_err("uid requires an argument\n");
+ return 0;
+ }
+ sbi->uid = make_kuid(current_user_ns(), (uid_t)tmp);
+ if (!uid_valid(sbi->uid)) {
+ pr_err("invalid uid specified\n");
+ return 0;
+ }
+ break;
+ case opt_gid:
+ if (match_int(&args[0], &tmp)) {
+ pr_err("gid requires an argument\n");
+ return 0;
+ }
+ sbi->gid = make_kgid(current_user_ns(), (gid_t)tmp);
+ if (!gid_valid(sbi->gid)) {
+ pr_err("invalid gid specified\n");
+ return 0;
+ }
+ break;
+ case opt_part:
+ if (match_int(&args[0], &sbi->part)) {
+ pr_err("part requires an argument\n");
+ return 0;
+ }
+ break;
+ case opt_session:
+ if (match_int(&args[0], &sbi->session)) {
+ pr_err("session requires an argument\n");
+ return 0;
+ }
+ break;
+ case opt_nls:
+ if (sbi->nls) {
+ pr_err("unable to change nls mapping\n");
+ return 0;
+ }
+ p = match_strdup(&args[0]);
+ if (p)
+ sbi->nls = load_nls(p);
+ if (!sbi->nls) {
+ pr_err("unable to load nls mapping \"%s\"\n",
+ p);
+ kfree(p);
+ return 0;
+ }
+ kfree(p);
+ break;
+ case opt_decompose:
+ clear_bit(HFSPLUS_SB_NODECOMPOSE, &sbi->flags);
+ break;
+ case opt_nodecompose:
+ set_bit(HFSPLUS_SB_NODECOMPOSE, &sbi->flags);
+ break;
+ case opt_barrier:
+ clear_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags);
+ break;
+ case opt_nobarrier:
+ set_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags);
+ break;
+ case opt_force:
+ set_bit(HFSPLUS_SB_FORCE, &sbi->flags);
+ break;
+ default:
+ return 0;
+ }
+ }
+
+done:
+ if (!sbi->nls) {
+ /* try utf8 first, as this is the old default behaviour */
+ sbi->nls = load_nls("utf8");
+ if (!sbi->nls)
+ sbi->nls = load_nls_default();
+ if (!sbi->nls)
+ return 0;
+ }
+
+ return 1;
+}
+
+int hfsplus_show_options(struct seq_file *seq, struct dentry *root)
+{
+ struct hfsplus_sb_info *sbi = HFSPLUS_SB(root->d_sb);
+
+ if (sbi->creator != HFSPLUS_DEF_CR_TYPE)
+ seq_show_option_n(seq, "creator", (char *)&sbi->creator, 4);
+ if (sbi->type != HFSPLUS_DEF_CR_TYPE)
+ seq_show_option_n(seq, "type", (char *)&sbi->type, 4);
+ seq_printf(seq, ",umask=%o,uid=%u,gid=%u", sbi->umask,
+ from_kuid_munged(&init_user_ns, sbi->uid),
+ from_kgid_munged(&init_user_ns, sbi->gid));
+ if (sbi->part >= 0)
+ seq_printf(seq, ",part=%u", sbi->part);
+ if (sbi->session >= 0)
+ seq_printf(seq, ",session=%u", sbi->session);
+ if (sbi->nls)
+ seq_printf(seq, ",nls=%s", sbi->nls->charset);
+ if (test_bit(HFSPLUS_SB_NODECOMPOSE, &sbi->flags))
+ seq_puts(seq, ",nodecompose");
+ if (test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
+ seq_puts(seq, ",nobarrier");
+ return 0;
+}