Btrfs: fix race between mmap writes and compression
[linux-3.10.git] / fs / exofs / ore.c
index 49cf230..f936cb5 100644 (file)
@@ -735,13 +735,7 @@ static int _prepare_for_striping(struct ore_io_state *ios)
 out:
        ios->numdevs = devs_in_group;
        ios->pages_consumed = cur_pg;
-       if (unlikely(ret)) {
-               if (length == ios->length)
-                       return ret;
-               else
-                       ios->length -= length;
-       }
-       return 0;
+       return ret;
 }
 
 int ore_create(struct ore_io_state *ios)
@@ -820,8 +814,8 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                        struct bio *bio;
 
                        if (per_dev != master_dev) {
-                               bio = bio_kmalloc(GFP_KERNEL,
-                                                 master_dev->bio->bi_max_vecs);
+                               bio = bio_clone_kmalloc(master_dev->bio,
+                                                       GFP_KERNEL);
                                if (unlikely(!bio)) {
                                        ORE_DBGMSG(
                                              "Failed to allocate BIO size=%u\n",
@@ -830,7 +824,6 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                                        goto out;
                                }
 
-                               __bio_clone(bio, master_dev->bio);
                                bio->bi_bdev = NULL;
                                bio->bi_next = NULL;
                                per_dev->offset = master_dev->offset;
@@ -843,11 +836,11 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                                bio->bi_rw |= REQ_WRITE;
                        }
 
-                       osd_req_write(or, _ios_obj(ios, dev), per_dev->offset,
-                                     bio, per_dev->length);
+                       osd_req_write(or, _ios_obj(ios, cur_comp),
+                                     per_dev->offset, bio, per_dev->length);
                        ORE_DBGMSG("write(0x%llx) offset=0x%llx "
                                      "length=0x%llx dev=%d\n",
-                                    _LLU(_ios_obj(ios, dev)->id),
+                                    _LLU(_ios_obj(ios, cur_comp)->id),
                                     _LLU(per_dev->offset),
                                     _LLU(per_dev->length), dev);
                } else if (ios->kern_buff) {
@@ -859,20 +852,20 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
                               (ios->si.unit_off + ios->length >
                                ios->layout->stripe_unit));
 
-                       ret = osd_req_write_kern(or, _ios_obj(ios, per_dev->dev),
+                       ret = osd_req_write_kern(or, _ios_obj(ios, cur_comp),
                                                 per_dev->offset,
                                                 ios->kern_buff, ios->length);
                        if (unlikely(ret))
                                goto out;
                        ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
                                      "length=0x%llx dev=%d\n",
-                                    _LLU(_ios_obj(ios, dev)->id),
+                                    _LLU(_ios_obj(ios, cur_comp)->id),
                                     _LLU(per_dev->offset),
                                     _LLU(ios->length), per_dev->dev);
                } else {
-                       osd_req_set_attributes(or, _ios_obj(ios, dev));
+                       osd_req_set_attributes(or, _ios_obj(ios, cur_comp));
                        ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
-                                    _LLU(_ios_obj(ios, dev)->id),
+                                    _LLU(_ios_obj(ios, cur_comp)->id),
                                     ios->out_attr_len, dev);
                }