xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ubi: fastmap: Check each mapping only once

Browse Source 
Maintain a bitmap to keep track of which LEB->PEB mapping
was checked already.
That way we have to read back VID headers only once.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger
2018-05-28 22:04:33 +02:00
parent 781932375f
commit 34653fd8c4
6 changed files with 52 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/mtd/ubi/vtbl.c
View File

@@ -534,7 +534,7 @@ static int init_volumes(struct ubi_device *ubi,
const struct ubi_attach_info *ai,
const struct ubi_vtbl_record *vtbl)
{
int i, reserved_pebs = 0;
int i, err, reserved_pebs = 0;
struct ubi_ainf_volume *av;
struct ubi_volume *vol;
@@ -620,6 +620,16 @@ static int init_volumes(struct ubi_device *ubi,
(long long)(vol->used_ebs - 1) * vol->usable_leb_size;
vol->used_bytes += av->last_data_size;
vol->last_eb_bytes = av->last_data_size;
/*
* We use ubi->peb_count and not vol->reserved_pebs because
* we want to keep the code simple. Otherwise we'd have to
* resize/check the bitmap upon volume resize too.
* Allocating a few bytes more does not hurt.
*/
err = ubi_fastmap_init_checkmap(vol, ubi->peb_count);
if (err)
return err;
}
/* And add the layout volume */
@@ -645,6 +655,9 @@ static int init_volumes(struct ubi_device *ubi,
reserved_pebs += vol->reserved_pebs;
ubi->vol_count += 1;
vol->ubi = ubi;
err = ubi_fastmap_init_checkmap(vol, UBI_LAYOUT_VOLUME_EBS);
if (err)
return err;
if (reserved_pebs > ubi->avail_pebs) {
ubi_err(ubi, "not enough PEBs, required %d, available %d",
@@ -849,6 +862,7 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai)
out_free:
vfree(ubi->vtbl);
for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
ubi_fastmap_destroy_checkmap(ubi->volumes[i]);
kfree(ubi->volumes[i]);
ubi->volumes[i] = NULL;
}