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Subject[PATCH 4/5] ubifs: Allow setting assert action as mount parameter
Date
Expose our three options to userspace.

Signed-off-by: Richard Weinberger <richard@nod.at>
---
fs/ubifs/misc.c | 11 +++++++++++
fs/ubifs/misc.h | 2 ++
fs/ubifs/super.c | 24 ++++++++++++++++++++++++
3 files changed, 37 insertions(+)

diff --git a/fs/ubifs/misc.c b/fs/ubifs/misc.c
index 586fd5b578a7..cd23de0f211d 100644
--- a/fs/ubifs/misc.c
+++ b/fs/ubifs/misc.c
@@ -56,3 +56,14 @@ void ubifs_warn(const struct ubifs_info *c, const char *fmt, ...)

va_end(args);
}
+
+static char *assert_names[] = {
+ [ASSACT_REPORT] = "report",
+ [ASSACT_RO] = "read-only",
+ [ASSACT_PANIC] = "panic",
+};
+
+const char *ubifs_assert_action_name(struct ubifs_info *c)
+{
+ return assert_names[c->assert_action];
+}
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index f5d180c0c52e..21d35d7dd975 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -287,4 +287,6 @@ static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
return lnum;
}

+const char *ubifs_assert_action_name(struct ubifs_info *c);
+
#endif /* __UBIFS_MISC_H__ */
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index c2796373b837..524122da7868 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -445,6 +445,7 @@ static int ubifs_show_options(struct seq_file *s, struct dentry *root)
ubifs_compr_name(c, c->mount_opts.compr_type));
}

+ seq_printf(s, ",assert=%s", ubifs_assert_action_name(c));
seq_printf(s, ",ubi=%d,vol=%d", c->vi.ubi_num, c->vi.vol_id);

return 0;
@@ -922,6 +923,7 @@ static int check_volume_empty(struct ubifs_info *c)
* Opt_chk_data_crc: check CRCs when reading data nodes
* Opt_no_chk_data_crc: do not check CRCs when reading data nodes
* Opt_override_compr: override default compressor
+ * Opt_assert: set ubifs_assert() action
* Opt_err: just end of array marker
*/
enum {
@@ -932,6 +934,7 @@ enum {
Opt_chk_data_crc,
Opt_no_chk_data_crc,
Opt_override_compr,
+ Opt_assert,
Opt_ignore,
Opt_err,
};
@@ -946,6 +949,7 @@ static const match_table_t tokens = {
{Opt_override_compr, "compr=%s"},
{Opt_ignore, "ubi=%s"},
{Opt_ignore, "vol=%s"},
+ {Opt_assert, "assert=%s"},
{Opt_err, NULL},
};

@@ -1046,6 +1050,26 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
c->default_compr = c->mount_opts.compr_type;
break;
}
+ case Opt_assert:
+ {
+ char *act = match_strdup(&args[0]);
+
+ if (!act)
+ return -ENOMEM;
+ if (!strcmp(act, "report"))
+ c->assert_action = ASSACT_REPORT;
+ else if (!strcmp(act, "read-only"))
+ c->assert_action = ASSACT_RO;
+ else if (!strcmp(act, "panic"))
+ c->assert_action = ASSACT_PANIC;
+ else {
+ ubifs_err(c, "unknown assert action \"%s\"", act);
+ kfree(act);
+ return -EINVAL;
+ }
+ kfree(act);
+ break;
+ }
case Opt_ignore:
break;
default:
--
2.18.0
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