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authorJoel Reardon <joel@clambassador.com>2012-05-20 21:27:11 +0200
committerArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-05-21 11:34:41 +0300
commit62f384552b6756cf1ea71f8762d1e97dc77dbd90 (patch)
tree6ebd89f4f18eca1724e8a50b8fc6cdefc29de18a /include/linux/mtd
parent05a3cb7dcec5a15ed9b18a5317ba2075355c7547 (diff)
downloadtalos-op-linux-62f384552b6756cf1ea71f8762d1e97dc77dbd90.tar.gz
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UBI: modify ubi_wl_flush function to clear work queue for a lnum
This patch modifies ubi_wl_flush to force the erasure of particular volume id / logical eraseblock number pairs. Previous functionality is preserved when passing UBI_ALL for both values. The locations where ubi_wl_flush were called are appropriately changed: ubi_leb_erase only flushes for the erased LEB, and ubi_create_volume forces only flushing for its volume id. External code can call this new feature via the new function ubi_flush() added to kapi.c, which simply passes through to ubi_wl_flush(). This was tested by disabling the call to do_work in ubi thread, which results in the work queue remaining unless explicitly called to remove. UBIFS was changed to call ubifs_leb_change 50 times for four different LEBs. Then the new function was called to clear the queue: passing wrong volume ids / lnum, correct ones, and finally UBI_ALL for both to ensure it was finally all cleard. The work queue was dumped each time and the selective removal of the particular LEB numbers was observed. Extra checks were enabled and ubifs's integck was also run. Finally, the drive was repeatedly filled and emptied to ensure that the queue was cleared normally. Artem: amended the patch. Signed-off-by: Joel Reardon <reardonj@inf.ethz.ch> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/ubi.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
index f636f5df883f..c3918a0684fe 100644
--- a/include/linux/mtd/ubi.h
+++ b/include/linux/mtd/ubi.h
@@ -219,6 +219,7 @@ int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum);
int ubi_leb_map(struct ubi_volume_desc *desc, int lnum);
int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum);
int ubi_sync(int ubi_num);
+int ubi_flush(int ubi_num, int vol_id, int lnum);
/*
* This function is the same as the 'ubi_leb_read()' function, but it does not
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