From 577a27ff1b83c61e9eb6778ebdfd06aa940a79fb Mon Sep 17 00:00:00 2001
From: wangdi <wangdi>
Date: Wed, 7 Jan 2004 14:24:22 +0000
Subject: [PATCH] add options.c
---
lustre/snapfs/Makefile.am | 2 +-
lustre/snapfs/options.c | 95 +++++++++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+), 1 deletion(-)
create mode 100644 lustre/snapfs/options.c
diff --git a/lustre/snapfs/Makefile.am b/lustre/snapfs/Makefile.am
index 15d50ab37b..63a57a0a97 100644
--- a/lustre/snapfs/Makefile.am
+++ b/lustre/snapfs/Makefile.am
@@ -13,7 +13,7 @@ EXTRA_PROGRAMS = snapfs
snapfs_SOURCES = cache.c clonefs.c dcache.c dir.c dotsnap.c file.c
snapfs_SOURCES += filter.c inode.c journal_ext3.c psdev.c
-snapfs_SOURCES += snap.c snaptable.c super.c symlink.c sysctl.c
+snapfs_SOURCES += snap.c snaptable.c super.c symlink.c sysctl.c options.c
include $(top_srcdir)/Rules
diff --git a/lustre/snapfs/options.c b/lustre/snapfs/options.c
new file mode 100644
index 0000000000..fb951fa947
--- /dev/null
+++ b/lustre/snapfs/options.c
@@ -0,0 +1,95 @@
+/*
+ * snapfs/options.c
+ */
+#define DEBUG_SUBSYSTEM S_SNAP
+
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/jbd.h>
+#include <linux/ext3_fs.h>
+#include <linux/snap.h>
+#include <linux/errno.h>
+#include "snapfs_internal.h"
+
+
+static struct list_head option_list;
+char *options = NULL;
+char *opt_left = NULL;
+
+int init_option(char *data)
+{
+ INIT_LIST_HEAD(&option_list);
+ SNAP_ALLOC(options, strlen(data) + 1);
+ if (!options) {
+ CERROR("Can not allocate memory \n");
+ return -ENOMEM;
+ }
+ memcpy(options, data, strlen(data));
+ opt_left = options;
+ return 0;
+}
+/*cleanup options*/
+void cleanup_option()
+{
+ struct option *option;
+ while (!list_empty(&option_list)) {
+ option = list_entry(option_list.next, struct option, list);
+ list_del(&option->list);
+ SNAP_FREE(option->opt, strlen(option->opt) + 1);
+ SNAP_FREE(option->value, strlen(option->value) + 1);
+ SNAP_FREE(option, sizeof(struct option));
+ }
+ SNAP_FREE(options, strlen(options) + 1);
+}
+int get_opt(struct option **option, char **pos)
+{
+ char *name, *value, *left;
+ struct option *tmp_opt;
+ int length;
+
+ *pos = opt_left;
+
+ if (! *opt_left)
+ return -ENODATA;
+
+ left = strchr(opt_left, '=');
+
+ if (left == opt_left || !left)
+ return -EINVAL;
+
+ SNAP_ALLOC(tmp_opt, sizeof(struct option));
+
+ length = left - opt_left + 1;
+ SNAP_ALLOC(name, length);
+ tmp_opt->opt = name;
+ memset(name, 0, length);
+ while (opt_left != left) *name++ = *opt_left++;
+
+ opt_left ++; /*after '='*/
+
+ left = strchr(opt_left, ',');
+ if (left == opt_left) {
+ SNAP_FREE(tmp_opt->opt, length);
+ SNAP_FREE(tmp_opt, sizeof(struct option));
+ opt_left = *pos;
+ return -EINVAL;
+ }
+ if (!left)
+ left = opt_left + strlen(opt_left);
+ length = left - opt_left + 1;
+ SNAP_ALLOC(value, length);
+ tmp_opt->value = value;
+ memset(value, 0, length);
+ while (opt_left != left) *value++ = *opt_left++;
+
+ list_add(&tmp_opt->list, &option_list);
+
+ if (*opt_left == ',') opt_left ++; /*after ','*/
+
+ *option = tmp_opt;
+ return 0;
+}
--
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