* response queued for it, with the saved 'id' passed back.
*/
struct pending_req {
- struct blkif_st *blkif;
- u64 id;
- int nr_pages;
- atomic_t pendcnt;
- unsigned short operation;
- int status;
- struct list_head free_list;
+ struct blkif_st *blkif;
+ u64 id;
+ int nr_pages;
+ atomic_t pendcnt;
+ unsigned short operation;
+ int status;
+ struct list_head free_list;
};
#define BLKBACK_INVALID_HANDLE (~0)
* Little helpful macro to figure out the index and virtual address of the
* pending_pages[..]. For each 'pending_req' we have have up to
* BLKIF_MAX_SEGMENTS_PER_REQUEST (11) pages. The seg would be from 0 through
- * 10 and would index in the pending_pages[..]. */
+ * 10 and would index in the pending_pages[..].
+ */
static inline int vaddr_pagenr(struct pending_req *req, int seg)
{
return (req - blkbk->pending_reqs) *
/*
* Routines for managing virtual block devices (vbds).
*/
-
-
static int vbd_translate(struct phys_req *req, struct blkif_st *blkif,
int operation)
{
/*
* Unmap the grant references, and also remove the M2P over-rides
* used in the 'pending_req'.
-*/
+ */
static void xen_blkbk_unmap(struct pending_req *req)
{
struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST];
ret = HYPERVISOR_grant_table_op(
GNTTABOP_unmap_grant_ref, unmap, invcount);
BUG_ON(ret);
- /* Note, we use invcount, so nr->pages, so we can't index
+ /*
+ * Note, we use invcount, so nr->pages, so we can't index
* using vaddr(req, i).
*/
for (i = 0; i < invcount; i++) {
ret = m2p_remove_override(
virt_to_page(unmap[i].host_addr), false);
if (ret) {
- printk(KERN_ALERT "Failed to remove M2P override for " \
- "%lx\n", (unsigned long)unmap[i].host_addr);
+ printk(KERN_ALERT "Failed to remove M2P override for %lx\n",
+ (unsigned long)unmap[i].host_addr);
continue;
}
}
}
-static int xen_blkbk_map(struct blkif_request *req, struct pending_req *pending_req,
+
+static int xen_blkbk_map(struct blkif_request *req,
+ struct pending_req *pending_req,
struct seg_buf seg[])
{
struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST];
int i;
int nseg = req->nr_segments;
int ret = 0;
- /* Fill out preq.nr_sects with proper amount of sectors, and setup
+
+ /*
+ * Fill out preq.nr_sects with proper amount of sectors, and setup
* assign map[..] with the PFN of the page in our domain with the
* corresponding grant reference for each page.
*/
if (pending_req->operation != BLKIF_OP_READ)
flags |= GNTMAP_readonly;
gnttab_set_map_op(&map[i], vaddr(pending_req, i), flags,
- req->u.rw.seg[i].gref, pending_req->blkif->domid);
+ req->u.rw.seg[i].gref,
+ pending_req->blkif->domid);
}
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map, nseg);
BUG_ON(ret);
- /* Now swizzel the MFN in our domain with the MFN from the other domain
+ /*
+ * Now swizzle the MFN in our domain with the MFN from the other domain
* so that when we access vaddr(pending_req,i) it has the contents of
* the page from the other domain.
*/
pending_req->status = BLKIF_RSP_ERROR;
}
- /* If all of the bio's have completed it is time to unmap
+ /*
+ * If all of the bio's have completed it is time to unmap
* the grant references associated with 'request' and provide
* the proper response on the ring.
*/
}
/*
- * Transumation of the 'struct blkif_request' to a proper 'struct bio'
- * and call the 'submit_bio' to pass it to the underlaying storage.
+ * Transmutation of the 'struct blkif_request' to a proper 'struct bio'
+ * and call the 'submit_bio' to pass it to the underlying storage.
*/
static int dispatch_rw_block_io(struct blkif_st *blkif,
struct blkif_request *req,
case BLKIF_OP_FLUSH_DISKCACHE:
blkif->st_f_req++;
operation = WRITE_FLUSH;
- /* The frontend likes to set this to -1, which vbd_translate
- * is alergic too. */
+ /*
+ * The frontend likes to set this to -1, which vbd_translate
+ * is alergic too.
+ */
req->u.rw.sector_number = 0;
break;
case BLKIF_OP_WRITE_BARRIER:
preq.sector_number + preq.nr_sects, preq.dev);
goto fail_response;
}
- /* This check _MUST_ be done after vbd_translate as the preq.bdev
- * is set there. */
+
+ /*
+ * This check _MUST_ be done after vbd_translate as the preq.bdev
+ * is set there.
+ */
for (i = 0; i < nseg; i++) {
if (((int)preq.sector_number|(int)seg[i].nsec) &
((bdev_logical_block_size(preq.bdev) >> 9) - 1)) {
goto fail_response;
}
}
- /* If we have failed at this point, we need to undo the M2P override,
+
+ /*
+ * If we have failed at this point, we need to undo the M2P override,
* set gnttab_set_unmap_op on all of the grant references and perform
* the hypercall to unmap the grants - that is all done in
* xen_blkbk_unmap.
bio->bi_end_io = end_block_io_op;
}
-
- /* We set it one so that the last submit_bio does not have to call
+ /*
+ * We set it one so that the last submit_bio does not have to call
* atomic_inc.
*/
atomic_set(&pending_req->pendcnt, nbio);
projects / mv-sheeva.git / blobdiff