Merge branch 'master' into for-next

Conflicts:
	drivers/devfreq/exynos4_bus.c

Sync with Linus' tree to be able to apply patches that are
against newer code (mvneta).

1 files changed, 121 insertions, 51 deletions

diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 0b296253bd01..60cd2fa4e047 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -48,6 +48,83 @@ static void xfs_dir2_leaf_log_bests(struct xfs_trans *tp, struct xfs_buf *bp,
                                     int first, int last);
 static void xfs_dir2_leaf_log_tail(struct xfs_trans *tp, struct xfs_buf *bp);
 
+static void
+xfs_dir2_leaf_verify(
+        struct xfs_buf          *bp,
+        __be16                  magic)
+{
+        struct xfs_mount        *mp = bp->b_target->bt_mount;
+        struct xfs_dir2_leaf_hdr *hdr = bp->b_addr;
+        int                     block_ok = 0;
+
+        block_ok = hdr->info.magic == magic;
+        if (!block_ok) {
+                XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+                xfs_buf_ioerror(bp, EFSCORRUPTED);
+        }
+}
+
+static void
+xfs_dir2_leaf1_read_verify(
+        struct xfs_buf  *bp)
+{
+        xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
+}
+
+static void
+xfs_dir2_leaf1_write_verify(
+        struct xfs_buf  *bp)
+{
+        xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
+}
+
+void
+xfs_dir2_leafn_read_verify(
+        struct xfs_buf  *bp)
+{
+        xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
+}
+
+void
+xfs_dir2_leafn_write_verify(
+        struct xfs_buf  *bp)
+{
+        xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
+}
+
+static const struct xfs_buf_ops xfs_dir2_leaf1_buf_ops = {
+        .verify_read = xfs_dir2_leaf1_read_verify,
+        .verify_write = xfs_dir2_leaf1_write_verify,
+};
+
+const struct xfs_buf_ops xfs_dir2_leafn_buf_ops = {
+        .verify_read = xfs_dir2_leafn_read_verify,
+        .verify_write = xfs_dir2_leafn_write_verify,
+};
+
+static int
+xfs_dir2_leaf_read(
+        struct xfs_trans        *tp,
+        struct xfs_inode        *dp,
+        xfs_dablk_t             fbno,
+        xfs_daddr_t             mappedbno,
+        struct xfs_buf          **bpp)
+{
+        return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
+                                XFS_DATA_FORK, &xfs_dir2_leaf1_buf_ops);
+}
+
+int
+xfs_dir2_leafn_read(
+        struct xfs_trans        *tp,
+        struct xfs_inode        *dp,
+        xfs_dablk_t             fbno,
+        xfs_daddr_t             mappedbno,
+        struct xfs_buf          **bpp)
+{
+        return xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
+                                XFS_DATA_FORK, &xfs_dir2_leafn_buf_ops);
+}
 
 /*
  * Convert a block form directory to a leaf form directory.
@@ -125,6 +202,7 @@ xfs_dir2_block_to_leaf(
         /*
          * Fix up the block header, make it a data block.
          */
+        dbp->b_ops = &xfs_dir2_data_buf_ops;
         hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);
         if (needscan)
                 xfs_dir2_data_freescan(mp, hdr, &needlog);
@@ -311,15 +389,11 @@ xfs_dir2_leaf_addname(
         dp = args->dp;
         tp = args->trans;
         mp = dp->i_mount;
-        /*
-         * Read the leaf block.
-         */
-        error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp,
-                XFS_DATA_FORK);
-        if (error) {
+
+        error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp);
+        if (error)
                 return error;
-        }
-        ASSERT(lbp != NULL);
+
         /*
          * Look up the entry by hash value and name.
          * We know it's not there, our caller has already done a lookup.
@@ -494,22 +568,21 @@ xfs_dir2_leaf_addname(
                 hdr = dbp->b_addr;
                 bestsp[use_block] = hdr->bestfree[0].length;
                 grown = 1;
-        }
-        /*
-         * Already had space in some data block.
-         * Just read that one in.
-         */
-        else {
-                if ((error =
-                    xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block),
-                            -1, &dbp, XFS_DATA_FORK))) {
+        } else {
+                /*
+                 * Already had space in some data block.
+                 * Just read that one in.
+                 */
+                error = xfs_dir2_data_read(tp, dp,
+                                           xfs_dir2_db_to_da(mp, use_block),
+                                           -1, &dbp);
+                if (error) {
                         xfs_trans_brelse(tp, lbp);
                         return error;
                 }
                 hdr = dbp->b_addr;
                 grown = 0;
         }
-        xfs_dir2_data_check(dp, dbp);
         /*
          * Point to the biggest freespace in our data block.
          */
@@ -892,10 +965,9 @@ xfs_dir2_leaf_readbuf(
          * Read the directory block starting at the first mapping.
          */
         mip->curdb = xfs_dir2_da_to_db(mp, map->br_startoff);
-        error = xfs_da_read_buf(NULL, dp, map->br_startoff,
+        error = xfs_dir2_data_read(NULL, dp, map->br_startoff,
                         map->br_blockcount >= mp->m_dirblkfsbs ?
-                            XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1,
-                        &bp, XFS_DATA_FORK);
+                            XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, &bp);
 
         /*
          * Should just skip over the data block instead of giving up.
@@ -922,11 +994,11 @@ xfs_dir2_leaf_readbuf(
                  */
                 if (i > mip->ra_current &&
                     map[mip->ra_index].br_blockcount >= mp->m_dirblkfsbs) {
-                        xfs_buf_readahead(mp->m_ddev_targp,
+                        xfs_dir2_data_readahead(NULL, dp,
+                                map[mip->ra_index].br_startoff + mip->ra_offset,
                                 XFS_FSB_TO_DADDR(mp,
                                         map[mip->ra_index].br_startblock +
-                                                        mip->ra_offset),
-                                (int)BTOBB(mp->m_dirblksize));
+                                                        mip->ra_offset));
                         mip->ra_current = i;
                 }
 
@@ -935,10 +1007,9 @@ xfs_dir2_leaf_readbuf(
                  * use our mapping, but this is a very rare case.
                  */
                 else if (i > mip->ra_current) {
-                        xfs_da_reada_buf(NULL, dp,
+                        xfs_dir2_data_readahead(NULL, dp,
                                         map[mip->ra_index].br_startoff +
-                                                        mip->ra_offset,
-                                        XFS_DATA_FORK);
+                                                        mip->ra_offset, -1);
                         mip->ra_current = i;
                 }
 
@@ -1177,15 +1248,14 @@ xfs_dir2_leaf_init(
          * Get the buffer for the block.
          */
         error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp,
-                XFS_DATA_FORK);
-        if (error) {
+                               XFS_DATA_FORK);
+        if (error)
                 return error;
-        }
-        ASSERT(bp != NULL);
-        leaf = bp->b_addr;
+
         /*
          * Initialize the header.
          */
+        leaf = bp->b_addr;
         leaf->hdr.info.magic = cpu_to_be16(magic);
         leaf->hdr.info.forw = 0;
         leaf->hdr.info.back = 0;
@@ -1198,10 +1268,12 @@ xfs_dir2_leaf_init(
          * the block.
          */
         if (magic == XFS_DIR2_LEAF1_MAGIC) {
+                bp->b_ops = &xfs_dir2_leaf1_buf_ops;
                 ltp = xfs_dir2_leaf_tail_p(mp, leaf);
                 ltp->bestcount = 0;
                 xfs_dir2_leaf_log_tail(tp, bp);
-        }
+        } else
+                bp->b_ops = &xfs_dir2_leafn_buf_ops;
         *bpp = bp;
         return 0;
 }
@@ -1372,13 +1444,11 @@ xfs_dir2_leaf_lookup_int(
         dp = args->dp;
         tp = args->trans;
         mp = dp->i_mount;
-        /*
-         * Read the leaf block into the buffer.
-         */
-        error = xfs_da_read_buf(tp, dp, mp->m_dirleafblk, -1, &lbp,
-                                                        XFS_DATA_FORK);
+
+        error = xfs_dir2_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp);
         if (error)
                 return error;
+
         *lbpp = lbp;
         leaf = lbp->b_addr;
         xfs_dir2_leaf_check(dp, lbp);
@@ -1409,14 +1479,13 @@ xfs_dir2_leaf_lookup_int(
                 if (newdb != curdb) {
                         if (dbp)
                                 xfs_trans_brelse(tp, dbp);
-                        error = xfs_da_read_buf(tp, dp,
-                                                xfs_dir2_db_to_da(mp, newdb),
-                                                -1, &dbp, XFS_DATA_FORK);
+                        error = xfs_dir2_data_read(tp, dp,
+                                                   xfs_dir2_db_to_da(mp, newdb),
+                                                   -1, &dbp);
                         if (error) {
                                 xfs_trans_brelse(tp, lbp);
                                 return error;
                         }
-                        xfs_dir2_data_check(dp, dbp);
                         curdb = newdb;
                 }
                 /*
@@ -1451,9 +1520,9 @@ xfs_dir2_leaf_lookup_int(
                 ASSERT(cidb != -1);
                 if (cidb != curdb) {
                         xfs_trans_brelse(tp, dbp);
-                        error = xfs_da_read_buf(tp, dp,
-                                                xfs_dir2_db_to_da(mp, cidb),
-                                                -1, &dbp, XFS_DATA_FORK);
+                        error = xfs_dir2_data_read(tp, dp,
+                                                   xfs_dir2_db_to_da(mp, cidb),
+                                                   -1, &dbp);
                         if (error) {
                                 xfs_trans_brelse(tp, lbp);
                                 return error;
@@ -1738,10 +1807,9 @@ xfs_dir2_leaf_trim_data(
         /*
          * Read the offending data block.  We need its buffer.
          */
-        if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp,
-                        XFS_DATA_FORK))) {
+        error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp);
+        if (error)
                 return error;
-        }
 
         leaf = lbp->b_addr;
         ltp = xfs_dir2_leaf_tail_p(mp, leaf);
@@ -1864,10 +1932,9 @@ xfs_dir2_node_to_leaf(
         /*
          * Read the freespace block.
          */
-        if ((error = xfs_da_read_buf(tp, dp, mp->m_dirfreeblk, -1, &fbp,
-                        XFS_DATA_FORK))) {
+        error = xfs_dir2_free_read(tp, dp,  mp->m_dirfreeblk, &fbp);
+        if (error)
                 return error;
-        }
         free = fbp->b_addr;
         ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC));
         ASSERT(!free->hdr.firstdb);
@@ -1890,7 +1957,10 @@ xfs_dir2_node_to_leaf(
                 xfs_dir2_leaf_compact(args, lbp);
         else
                 xfs_dir2_leaf_log_header(tp, lbp);
+
+        lbp->b_ops = &xfs_dir2_leaf1_buf_ops;
         leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC);
+
         /*
          * Set up the leaf tail from the freespace block.
          */