ore: Remove check for ios->kern_buff in _prepare_for_striping to later

Move the check and preparation of the ios->kern_buff case to
later inside _write_mirror().

Since read was never used with ios->kern_buff its support is removed
instead of fixed.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 7e02d33..d0f8db5 100644 (file)
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -427,17 +427,6 @@ static int _prepare_for_striping(struct ore_io_state *ios)
        int ret = 0;
 
        if (!ios->pages) {
-               if (ios->kern_buff) {
-                       struct ore_per_dev_state *per_dev = &ios->per_dev[0];
-
-                       per_dev->offset = si->obj_offset;
-                       per_dev->dev = si->dev;
-
-                       /* no cross device without page array */
-                       BUG_ON((ios->layout->group_width > 1) &&
-                              (si->unit_off + ios->length >
-                               ios->layout->stripe_unit));
-               }
                ios->numdevs = ios->layout->mirrors_p1;
                return 0;
        }
@@ -557,7 +546,6 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                        goto out;
                }
                per_dev->or = or;
-               per_dev->offset = master_dev->offset;
 
                if (ios->pages) {
                        struct bio *bio;
@@ -576,6 +564,7 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                                __bio_clone(bio, master_dev->bio);
                                bio->bi_bdev = NULL;
                                bio->bi_next = NULL;
+                               per_dev->offset = master_dev->offset;
                                per_dev->length = master_dev->length;
                                per_dev->bio =  bio;
                                per_dev->dev = dev;
@@ -593,7 +582,15 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                                     _LLU(per_dev->offset),
                                     _LLU(per_dev->length), dev);
                } else if (ios->kern_buff) {
-                       ret = osd_req_write_kern(or, _ios_obj(ios, dev),
+                       per_dev->offset = ios->si.obj_offset;
+                       per_dev->dev = ios->si.dev + dev;
+
+                       /* no cross device without page array */
+                       BUG_ON((ios->layout->group_width > 1) &&
+                              (ios->si.unit_off + ios->length >
+                               ios->layout->stripe_unit));
+
+                       ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev),
                                                 per_dev->offset,
                                                 ios->kern_buff, ios->length);
                        if (unlikely(ret))
@@ -602,7 +599,7 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                                      "length=0x%llx dev=%d\n",
                                     _LLU(_ios_obj(ios, dev)->id),
                                     _LLU(per_dev->offset),
-                                    _LLU(ios->length), dev);
+                                    _LLU(ios->length), per_dev->dev);
                } else {
                        osd_req_set_attributes(or, _ios_obj(ios, dev));
                        ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
@@ -668,16 +665,9 @@ static int _read_mirror(struct ore_io_state *ios, unsigned cur_comp)
                             " dev=%d\n", _LLU(obj->id),
                             _LLU(per_dev->offset), _LLU(per_dev->length),
                             first_dev);
-       } else if (ios->kern_buff) {
-               int ret = osd_req_read_kern(or, obj, per_dev->offset,
-                                           ios->kern_buff, ios->length);
-               ORE_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
-                             "length=0x%llx dev=%d ret=>%d\n",
-                             _LLU(obj->id), _LLU(per_dev->offset),
-                             _LLU(ios->length), first_dev, ret);
-               if (unlikely(ret))
-                       return ret;
        } else {
+               BUG_ON(ios->kern_buff);
+
                osd_req_get_attributes(or, obj);
                ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
                              _LLU(obj->id),