GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[LogFS] Fix bdev erases

Browse source 
Erases for block devices were always just emulated by writing 0xff.
Some time back the write was removed and only the page cache was
changed to 0xff.  Superficialy a good idea with two problems:
1. Touching the page cache isn't necessary either.
2. However, writing out 0xff _is_ necessary for the journal.  As the
   journal is scanned linearly, an old non-overwritten commit entry
   can be used on next mount and cause havoc.

This should fix both aspects.
This commit is contained in:
Joern Engel 2010-03-04 21:30:58 +01:00
parent 5c564c2a04
commit 9421502b4f
6 changed files with 97 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

6
fs/logfs/segment.c
View file

@ -25,14 +25,14 @@ static int logfs_mark_segment_bad(struct super_block *sb, u32 segno)
return 0;
}
int logfs_erase_segment(struct super_block *sb, u32 segno)
int logfs_erase_segment(struct super_block *sb, u32 segno, int ensure_erase)
{
struct logfs_super *super = logfs_super(sb);
super->s_gec++;
return super->s_devops->erase(sb, (u64)segno << super->s_segshift,
super->s_segsize);
super->s_segsize, ensure_erase);
}
static s64 logfs_get_free_bytes(struct logfs_area *area, size_t bytes)
@ -798,7 +798,7 @@ static int ostore_erase_segment(struct logfs_area *area)
u64 ofs;
int err;
err = logfs_erase_segment(sb, area->a_segno);
err = logfs_erase_segment(sb, area->a_segno, 0);
if (err)
return err;