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path: root/drivers/md/dm-io.c
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Diffstat (limited to 'drivers/md/dm-io.c')
-rw-r--r--drivers/md/dm-io.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 2067288f61f..ad2eba40e31 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -38,6 +38,8 @@ struct io {
struct dm_io_client *client;
io_notify_fn callback;
void *context;
+ void *vma_invalidate_address;
+ unsigned long vma_invalidate_size;
} __attribute__((aligned(DM_IO_MAX_REGIONS)));
static struct kmem_cache *_dm_io_cache;
@@ -116,6 +118,10 @@ static void dec_count(struct io *io, unsigned int region, int error)
set_bit(region, &io->error_bits);
if (atomic_dec_and_test(&io->count)) {
+ if (io->vma_invalidate_size)
+ invalidate_kernel_vmap_range(io->vma_invalidate_address,
+ io->vma_invalidate_size);
+
if (io->sleeper)
wake_up_process(io->sleeper);
@@ -159,6 +165,9 @@ struct dpages {
unsigned context_u;
void *context_ptr;
+
+ void *vma_invalidate_address;
+ unsigned long vma_invalidate_size;
};
/*
@@ -377,6 +386,9 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
io->sleeper = current;
io->client = client;
+ io->vma_invalidate_address = dp->vma_invalidate_address;
+ io->vma_invalidate_size = dp->vma_invalidate_size;
+
dispatch_io(rw, num_regions, where, dp, io, 1);
while (1) {
@@ -415,13 +427,21 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions,
io->callback = fn;
io->context = context;
+ io->vma_invalidate_address = dp->vma_invalidate_address;
+ io->vma_invalidate_size = dp->vma_invalidate_size;
+
dispatch_io(rw, num_regions, where, dp, io, 0);
return 0;
}
-static int dp_init(struct dm_io_request *io_req, struct dpages *dp)
+static int dp_init(struct dm_io_request *io_req, struct dpages *dp,
+ unsigned long size)
{
/* Set up dpages based on memory type */
+
+ dp->vma_invalidate_address = NULL;
+ dp->vma_invalidate_size = 0;
+
switch (io_req->mem.type) {
case DM_IO_PAGE_LIST:
list_dp_init(dp, io_req->mem.ptr.pl, io_req->mem.offset);
@@ -432,6 +452,11 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp)
break;
case DM_IO_VMA:
+ flush_kernel_vmap_range(io_req->mem.ptr.vma, size);
+ if ((io_req->bi_rw & RW_MASK) == READ) {
+ dp->vma_invalidate_address = io_req->mem.ptr.vma;
+ dp->vma_invalidate_size = size;
+ }
vm_dp_init(dp, io_req->mem.ptr.vma);
break;
@@ -460,7 +485,7 @@ int dm_io(struct dm_io_request *io_req, unsigned num_regions,
int r;
struct dpages dp;
- r = dp_init(io_req, &dp);
+ r = dp_init(io_req, &dp, (unsigned long)where->count << SECTOR_SHIFT);
if (r)
return r;