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UBI: support ubi_num on mtd.ubi command line

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I want to be able to add UBI volumes with specific numbers, but the
command line API doesn't have that atm.  Add an additional token to
support it.

Artem: amended the patch a little bit.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Mike Frysinger 2013-05-03 14:55:23 -04:00 committed by Artem Bityutskiy
parent 584d462335
commit 83ff59a066
1 changed files with 28 additions and 11 deletions
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39
drivers/mtd/ubi/build.c
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@ -47,7 +47,7 @@
#define MTD_PARAM_LEN_MAX 64
/* Maximum number of comma-separated items in the 'mtd=' parameter */
#define MTD_PARAM_MAX_COUNT 3
#define MTD_PARAM_MAX_COUNT 4
/* Maximum value for the number of bad PEBs per 1024 PEBs */
#define MAX_MTD_UBI_BEB_LIMIT 768
@ -67,6 +67,7 @@
*/
struct mtd_dev_param {
char name[MTD_PARAM_LEN_MAX];
int ubi_num;
int vid_hdr_offs;
int max_beb_per1024;
};
@ -1269,7 +1270,7 @@ static int __init ubi_init(void)
}
mutex_lock(&ubi_devices_mutex);
err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO,
err = ubi_attach_mtd_dev(mtd, p->ubi_num,
p->vid_hdr_offs, p->max_beb_per1024);
mutex_unlock(&ubi_devices_mutex);
if (err < 0) {
@ -1387,7 +1388,7 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
struct mtd_dev_param *p;
char buf[MTD_PARAM_LEN_MAX];
char *pbuf = &buf[0];
char *tokens[MTD_PARAM_MAX_COUNT];
char *tokens[MTD_PARAM_MAX_COUNT], *token;
if (!val)
return -EINVAL;
@ -1427,37 +1428,53 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
p = &mtd_dev_param[mtd_devs];
strcpy(&p->name[0], tokens[0]);
if (tokens[1])
p->vid_hdr_offs = bytes_str_to_int(tokens[1]);
token = tokens[1];
if (token) {
p->vid_hdr_offs = bytes_str_to_int(token);
if (p->vid_hdr_offs < 0)
return p->vid_hdr_offs;
if (p->vid_hdr_offs < 0)
return p->vid_hdr_offs;
}
if (tokens[2]) {
int err = kstrtoint(tokens[2], 10, &p->max_beb_per1024);
token = tokens[2];
if (token) {
int err = kstrtoint(token, 10, &p->max_beb_per1024);
if (err) {
ubi_err("bad value for max_beb_per1024 parameter: %s",
tokens[2]);
token);
return -EINVAL;
}
}
token = tokens[3];
if (token) {
int err = kstrtoint(token, 10, &p->ubi_num);
if (err) {
ubi_err("bad value for ubi_num parameter: %s", token);
return -EINVAL;
}
} else
p->ubi_num = UBI_DEV_NUM_AUTO;
mtd_devs += 1;
return 0;
}
module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024]].\n"
MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024[,ubi_num]]].\n"
"Multiple \"mtd\" parameters may be specified.\n"
"MTD devices may be specified by their number, name, or path to the MTD character device node.\n"
"Optional \"vid_hdr_offs\" parameter specifies UBI VID header position to be used by UBI. (default value if 0)\n"
"Optional \"max_beb_per1024\" parameter specifies the maximum expected bad eraseblock per 1024 eraseblocks. (default value ("
__stringify(CONFIG_MTD_UBI_BEB_LIMIT) ") if 0)\n"
"Optional \"ubi_num\" parameter specifies UBI device number which have to be assigned to the newly created UBI device (assigned automatically by default)\n"
"\n"
"Example 1: mtd=/dev/mtd0 - attach MTD device /dev/mtd0.\n"
"Example 2: mtd=content,1984 mtd=4 - attach MTD device with name \"content\" using VID header offset 1984, and MTD device number 4 with default VID header offset.\n"
"Example 3: mtd=/dev/mtd1,0,25 - attach MTD device /dev/mtd1 using default VID header offset and reserve 25*nand_size_in_blocks/1024 erase blocks for bad block handling.\n"
"Example 4: mtd=/dev/mtd1,0,0,5 - attach MTD device /dev/mtd1 to UBI 5 and using default values for the other fields.\n"
"\t(e.g. if the NAND *chipset* has 4096 PEB, 100 will be reserved for this UBI device).");
#ifdef CONFIG_MTD_UBI_FASTMAP
module_param(fm_autoconvert, bool, 0644);