LU-3268 lod: support BE servers in lod_verify_striping()

To support big-endian Lustre servers, in lod_verify_striping() use
leNN_to_cpu() to access the members of struct lov_user_md.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: I146e35ab75bc290e92aa9d68211fa1ffedada29b
Reviewed-on: http://review.whamcloud.com/6273
Tested-by: Hudson
Reviewed-by: Li Wei <wei.g.li@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c
index 14a2e79..5426554 100644 (file)
--- a/lustre/lod/lod_lov.c
+++ b/lustre/lod/lod_lov.c
@@ -835,87 +835,121 @@ int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
                        int specific)
 {
        struct lov_user_md_v1   *lum;
                        int specific)
 {
        struct lov_user_md_v1   *lum;

-       struct lov_user_md_v3   *v3 = NULL;
+       struct lov_user_md_v3   *lum3;

        struct pool_desc        *pool = NULL;
        struct pool_desc        *pool = NULL;

-       int                      rc;
+       __u32                    magic;
+       __u32                    stripe_size;
+       __u16                    stripe_count;
+       __u16                    stripe_offset;
+       size_t                   lum_size;
+       int                      rc = 0;

        ENTRY;
 
        lum = buf->lb_buf;
 
        ENTRY;
 
        lum = buf->lb_buf;
 

-       if (lum->lmm_magic != LOV_USER_MAGIC_V1 &&
-           lum->lmm_magic != LOV_USER_MAGIC_V3 &&
-           lum->lmm_magic != LOV_MAGIC_V1_DEF &&
-           lum->lmm_magic != LOV_MAGIC_V3_DEF) {
-               CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n",
-                      lum->lmm_magic);
-               RETURN(-EINVAL);
+       LASSERT(sizeof(*lum) < sizeof(*lum3));
+
+       if (buf->lb_len < sizeof(*lum)) {
+               CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md\n",
+                      buf->lb_len);
+               GOTO(out, rc = -EINVAL);
+       }
+
+       magic = le32_to_cpu(lum->lmm_magic);
+       if (magic != LOV_USER_MAGIC_V1 &&
+           magic != LOV_USER_MAGIC_V3 &&
+           magic != LOV_MAGIC_V1_DEF &&
+           magic != LOV_MAGIC_V3_DEF) {
+               CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
+               GOTO(out, rc = -EINVAL);

        }
 
        }
 

-       if ((specific && lum->lmm_pattern != LOV_PATTERN_RAID0) ||
-           (specific == 0 && lum->lmm_pattern != 0)) {
+       if ((specific && le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) ||
+           (!specific && lum->lmm_pattern != 0)) {

                CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
                CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",

-                      lum->lmm_pattern);
-               RETURN(-EINVAL);
+                      le32_to_cpu(lum->lmm_pattern));
+               GOTO(out, rc = -EINVAL);

        }
 
        /* 64kB is the largest common page size we see (ia64), and matches the
         * check in lfs */
        }
 
        /* 64kB is the largest common page size we see (ia64), and matches the
         * check in lfs */

-       if (lum->lmm_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
-               CDEBUG(D_IOCTL, "stripe size %u not multiple of %u, fixing\n",
-                      lum->lmm_stripe_size, LOV_MIN_STRIPE_SIZE);
-               RETURN(-EINVAL);
+       stripe_size = le32_to_cpu(lum->lmm_stripe_size);
+       if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
+               CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
+                      stripe_size, LOV_MIN_STRIPE_SIZE);
+               GOTO(out, rc = -EINVAL);

        }
 
        /* an offset of -1 is treated as a "special" valid offset */
        }
 
        /* an offset of -1 is treated as a "special" valid offset */

-       if (lum->lmm_stripe_offset != (typeof(lum->lmm_stripe_offset))(-1)) {
+       stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
+       if (stripe_offset != (typeof(stripe_offset))-1) {

                /* if offset is not within valid range [0, osts_size) */
                /* if offset is not within valid range [0, osts_size) */

-               if (lum->lmm_stripe_offset >= d->lod_osts_size) {
+               if (stripe_offset >= d->lod_osts_size) {

                        CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
                        CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",

-                              lum->lmm_stripe_offset, d->lod_osts_size);
-                       RETURN(-EINVAL);
+                              stripe_offset, d->lod_osts_size);
+                       GOTO(out, rc = -EINVAL);

                }
 
                /* if lmm_stripe_offset is *not* in bitmap */
                }
 
                /* if lmm_stripe_offset is *not* in bitmap */

-               if (!cfs_bitmap_check(d->lod_ost_bitmap,
-                                     lum->lmm_stripe_offset)) {
+               if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {

                        CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
                        CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",

-                              lum->lmm_stripe_offset);
-                       RETURN(-EINVAL);
+                              stripe_offset);
+                       GOTO(out, rc = -EINVAL);

                }
        }
 
                }
        }
 

-       if (lum->lmm_magic == LOV_USER_MAGIC_V3)
-               v3 = buf->lb_buf;
+       stripe_count = le16_to_cpu(lum->lmm_stripe_count);
+       if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
+               lum_size = offsetof(struct lov_user_md_v1,
+                                   lmm_objects[stripe_count]);
+       else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
+               lum_size = offsetof(struct lov_user_md_v3,
+                                   lmm_objects[stripe_count]);
+       else
+               LBUG();
+
+       if (specific && buf->lb_len != lum_size) {
+               CDEBUG(D_IOCTL, "invalid buf len %zd for lov_user_md with "
+                      "magic %#x and stripe_count %u\n",
+                      buf->lb_len, magic, stripe_count);
+               GOTO(out, rc = -EINVAL);
+       }

 
 

-       if (v3)
-               /* In the function below, .hs_keycmp resolves to
-                * pool_hashkey_keycmp() */
-               /* coverity[overrun-buffer-val] */
-               pool = lod_find_pool(d, v3->lmm_pool_name);
+       if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
+               goto out;

 
 

-       if (pool != NULL) {
-               __u16 offs = v3->lmm_stripe_offset;
+       lum3 = buf->lb_buf;
+       if (buf->lb_len < sizeof(*lum3)) {
+               CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md_v3\n",
+                      buf->lb_len);
+               GOTO(out, rc = -EINVAL);
+       }

 
 

-               if (offs != (typeof(v3->lmm_stripe_offset))(-1)) {
-                       rc = lod_check_index_in_pool(offs, pool);
-                       if (rc < 0) {
-                               lod_pool_putref(pool);
-                               RETURN(-EINVAL);
-                       }
-               }
+       /* In the function below, .hs_keycmp resolves to
+        * pool_hashkey_keycmp() */
+       /* coverity[overrun-buffer-val] */
+       pool = lod_find_pool(d, lum3->lmm_pool_name);
+       if (pool == NULL)
+               goto out;
+
+       if (stripe_offset != (typeof(stripe_offset))-1) {
+               rc = lod_check_index_in_pool(stripe_offset, pool);
+               if (rc < 0)
+                       GOTO(out, rc = -EINVAL);
+       }

 
 

-               if (specific && lum->lmm_stripe_count > pool_tgt_count(pool)) {
-                       CDEBUG(D_IOCTL,
-                              "stripe count %u > # OSTs %u in the pool\n",
-                              lum->lmm_stripe_count, pool_tgt_count(pool));
-                       lod_pool_putref(pool);
-                       RETURN(-EINVAL);
-               }
+       if (specific && stripe_count > pool_tgt_count(pool)) {
+               CDEBUG(D_IOCTL,
+                      "stripe count %u > # OSTs %u in the pool\n",
+                      stripe_count, pool_tgt_count(pool));
+               GOTO(out, rc = -EINVAL);
+       }

 
 

+out:
+       if (pool != NULL)

                lod_pool_putref(pool);
                lod_pool_putref(pool);

-       }

 
 

-       RETURN(0);
+       RETURN(rc);

 }
 
 void lod_fix_desc_stripe_size(__u64 *val)
 }
 
 void lod_fix_desc_stripe_size(__u64 *val)