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ubifs: Allow setting assert action as mount parameter 

Expose our three options to userspace.

Signed-off-by: Richard Weinberger <richard@nod.at>
hifive-unleashed-5.1
Richard Weinberger 2018-07-12 13:01:59 +02:00
parent 2e52eb7446
commit c38c5a7f2e
3 changed files with 37 additions and 0 deletions
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11
fs/ubifs/misc.c
View File

@ -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];
}

2
fs/ubifs/misc.h
View File

@ -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__ */

24
fs/ubifs/super.c
View File

@ -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: