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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/hfsplus/options.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/hfsplus/options.c')
-rw-r--r--fs/hfsplus/options.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
new file mode 100644
index 00000000000..1cca0102c98
--- /dev/null
+++ b/fs/hfsplus/options.c
@@ -0,0 +1,162 @@
+/*
+ * 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 "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_err
+};
+
+static 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_err, NULL }
+};
+
+/* Initialize an options object to reasonable defaults */
+void 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->fs->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;
+}
+
+/* Parse options from mount. Returns 0 on failure */
+/* input is the options passed to mount() as a string */
+int 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)) {
+ printk("HFS+-fs: creator requires a 4 character value\n");
+ return 0;
+ }
+ break;
+ case opt_type:
+ if (match_fourchar(&args[0], &sbi->type)) {
+ printk("HFS+-fs: type requires a 4 character value\n");
+ return 0;
+ }
+ break;
+ case opt_umask:
+ if (match_octal(&args[0], &tmp)) {
+ printk("HFS+-fs: umask requires a value\n");
+ return 0;
+ }
+ sbi->umask = (umode_t)tmp;
+ break;
+ case opt_uid:
+ if (match_int(&args[0], &tmp)) {
+ printk("HFS+-fs: uid requires an argument\n");
+ return 0;
+ }
+ sbi->uid = (uid_t)tmp;
+ break;
+ case opt_gid:
+ if (match_int(&args[0], &tmp)) {
+ printk("HFS+-fs: gid requires an argument\n");
+ return 0;
+ }
+ sbi->gid = (gid_t)tmp;
+ break;
+ case opt_part:
+ if (match_int(&args[0], &sbi->part)) {
+ printk("HFS+-fs: part requires an argument\n");
+ return 0;
+ }
+ break;
+ case opt_session:
+ if (match_int(&args[0], &sbi->session)) {
+ printk("HFS+-fs: session requires an argument\n");
+ return 0;
+ }
+ break;
+ case opt_nls:
+ if (sbi->nls) {
+ printk("HFS+-fs: unable to change nls mapping\n");
+ return 0;
+ }
+ p = match_strdup(&args[0]);
+ sbi->nls = load_nls(p);
+ if (!sbi->nls) {
+ printk("HFS+-fs: unable to load nls mapping \"%s\"\n", p);
+ kfree(p);
+ return 0;
+ }
+ kfree(p);
+ break;
+ case opt_decompose:
+ sbi->flags &= ~HFSPLUS_SB_NODECOMPOSE;
+ break;
+ case opt_nodecompose:
+ sbi->flags |= HFSPLUS_SB_NODECOMPOSE;
+ 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;
+}