Merge tag 'v3.8-rc4' into irq/core

Merge Linux 3.8-rc4 before pulling in new commits - we were on an old v3.7 base.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 111 insertions, 47 deletions

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index c25b094efbf7..94eaeedc5498 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -97,7 +97,9 @@ xfs_fs_geometry(
                         (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
                                 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
                         (xfs_sb_version_hasattr2(&mp->m_sb) ?
-                                XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
+                                XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) |
+                        (xfs_sb_version_hasprojid32bit(&mp->m_sb) ?
+                                XFS_FSOP_GEOM_FLAGS_PROJID32 : 0);
                 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
                                 mp->m_sb.sb_logsectsize : BBSIZE;
                 geo->rtsectsize = mp->m_sb.sb_blocksize;
@@ -112,18 +114,40 @@ xfs_fs_geometry(
         return 0;
 }
 
+static struct xfs_buf *
+xfs_growfs_get_hdr_buf(
+        struct xfs_mount        *mp,
+        xfs_daddr_t             blkno,
+        size_t                  numblks,
+        int                     flags,
+        const struct xfs_buf_ops *ops)
+{
+        struct xfs_buf          *bp;
+
+        bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
+        if (!bp)
+                return NULL;
+
+        xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
+        bp->b_bn = blkno;
+        bp->b_maps[0].bm_bn = blkno;
+        bp->b_ops = ops;
+
+        return bp;
+}
+
 static int
 xfs_growfs_data_private(
         xfs_mount_t             *mp,            /* mount point for filesystem */
         xfs_growfs_data_t       *in)            /* growfs data input struct */
 {
         xfs_agf_t               *agf;
+        struct xfs_agfl         *agfl;
         xfs_agi_t               *agi;
         xfs_agnumber_t          agno;
         xfs_extlen_t            agsize;
         xfs_extlen_t            tmpsize;
         xfs_alloc_rec_t         *arec;
-        struct xfs_btree_block  *block;
         xfs_buf_t               *bp;
         int                     bucket;
         int                     dpct;
@@ -146,9 +170,14 @@ xfs_growfs_data_private(
         dpct = pct - mp->m_sb.sb_imax_pct;
         bp = xfs_buf_read_uncached(mp->m_ddev_targp,
                                 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
-                                XFS_FSS_TO_BB(mp, 1), 0);
+                                XFS_FSS_TO_BB(mp, 1), 0, NULL);
         if (!bp)
                 return EIO;
+        if (bp->b_error) {
+                int     error = bp->b_error;
+                xfs_buf_relse(bp);
+                return error;
+        }
         xfs_buf_relse(bp);
 
         new = nb;       /* use new as a temporary here */
@@ -186,17 +215,18 @@ xfs_growfs_data_private(
         nfree = 0;
         for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
                 /*
-                 * AG freelist header block
+                 * AG freespace header block
                  */
-                bp = xfs_buf_get(mp->m_ddev_targp,
-                                 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
-                                 XFS_FSS_TO_BB(mp, 1), 0);
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
+                                XFS_FSS_TO_BB(mp, 1), 0,
+                                &xfs_agf_buf_ops);
                 if (!bp) {
                         error = ENOMEM;
                         goto error0;
                 }
+
                 agf = XFS_BUF_TO_AGF(bp);
-                memset(agf, 0, mp->m_sb.sb_sectsize);
                 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
                 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
                 agf->agf_seqno = cpu_to_be32(agno);
@@ -223,17 +253,39 @@ xfs_growfs_data_private(
                         goto error0;
 
                 /*
+                 * AG freelist header block
+                 */
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
+                                XFS_FSS_TO_BB(mp, 1), 0,
+                                &xfs_agfl_buf_ops);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
+
+                agfl = XFS_BUF_TO_AGFL(bp);
+                for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
+                        agfl->agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
+
+                error = xfs_bwrite(bp);
+                xfs_buf_relse(bp);
+                if (error)
+                        goto error0;
+
+                /*
                  * AG inode header block
                  */
-                bp = xfs_buf_get(mp->m_ddev_targp,
-                                 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
-                                 XFS_FSS_TO_BB(mp, 1), 0);
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
+                                XFS_FSS_TO_BB(mp, 1), 0,
+                                &xfs_agi_buf_ops);
                 if (!bp) {
                         error = ENOMEM;
                         goto error0;
                 }
+
                 agi = XFS_BUF_TO_AGI(bp);
-                memset(agi, 0, mp->m_sb.sb_sectsize);
                 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
                 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
                 agi->agi_seqno = cpu_to_be32(agno);
@@ -254,24 +306,22 @@ xfs_growfs_data_private(
                 /*
                  * BNO btree root block
                  */
-                bp = xfs_buf_get(mp->m_ddev_targp,
-                                 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
-                                 BTOBB(mp->m_sb.sb_blocksize), 0);
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
+                                BTOBB(mp->m_sb.sb_blocksize), 0,
+                                &xfs_allocbt_buf_ops);
+
                 if (!bp) {
                         error = ENOMEM;
                         goto error0;
                 }
-                block = XFS_BUF_TO_BLOCK(bp);
-                memset(block, 0, mp->m_sb.sb_blocksize);
-                block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
-                block->bb_level = 0;
-                block->bb_numrecs = cpu_to_be16(1);
-                block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
-                block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
-                arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
+
+                xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0);
+                arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
                 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
                 arec->ar_blockcount = cpu_to_be32(
                         agsize - be32_to_cpu(arec->ar_startblock));
+
                 error = xfs_bwrite(bp);
                 xfs_buf_relse(bp);
                 if (error)
@@ -280,25 +330,22 @@ xfs_growfs_data_private(
                 /*
                  * CNT btree root block
                  */
-                bp = xfs_buf_get(mp->m_ddev_targp,
-                                 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
-                                 BTOBB(mp->m_sb.sb_blocksize), 0);
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
+                                BTOBB(mp->m_sb.sb_blocksize), 0,
+                                &xfs_allocbt_buf_ops);
                 if (!bp) {
                         error = ENOMEM;
                         goto error0;
                 }
-                block = XFS_BUF_TO_BLOCK(bp);
-                memset(block, 0, mp->m_sb.sb_blocksize);
-                block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
-                block->bb_level = 0;
-                block->bb_numrecs = cpu_to_be16(1);
-                block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
-                block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
-                arec = XFS_ALLOC_REC_ADDR(mp, block, 1);
+
+                xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0);
+                arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
                 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
                 arec->ar_blockcount = cpu_to_be32(
                         agsize - be32_to_cpu(arec->ar_startblock));
                 nfree += be32_to_cpu(arec->ar_blockcount);
+
                 error = xfs_bwrite(bp);
                 xfs_buf_relse(bp);
                 if (error)
@@ -307,20 +354,17 @@ xfs_growfs_data_private(
                 /*
                  * INO btree root block
                  */
-                bp = xfs_buf_get(mp->m_ddev_targp,
-                                 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
-                                 BTOBB(mp->m_sb.sb_blocksize), 0);
+                bp = xfs_growfs_get_hdr_buf(mp,
+                                XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
+                                BTOBB(mp->m_sb.sb_blocksize), 0,
+                                &xfs_inobt_buf_ops);
                 if (!bp) {
                         error = ENOMEM;
                         goto error0;
                 }
-                block = XFS_BUF_TO_BLOCK(bp);
-                memset(block, 0, mp->m_sb.sb_blocksize);
-                block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);
-                block->bb_level = 0;
-                block->bb_numrecs = 0;
-                block->bb_u.s.bb_leftsib = cpu_to_be32(NULLAGBLOCK);
-                block->bb_u.s.bb_rightsib = cpu_to_be32(NULLAGBLOCK);
+
+                xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0);
+
                 error = xfs_bwrite(bp);
                 xfs_buf_relse(bp);
                 if (error)
@@ -399,9 +443,28 @@ xfs_growfs_data_private(
 
         /* update secondary superblocks. */
         for (agno = 1; agno < nagcount; agno++) {
-                error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
+                error = 0;
+                /*
+                 * new secondary superblocks need to be zeroed, not read from
+                 * disk as the contents of the new area we are growing into is
+                 * completely unknown.
+                 */
+                if (agno < oagcount) {
+                        error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
+                                  XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
+                                  XFS_FSS_TO_BB(mp, 1), 0, &bp,
+                                  &xfs_sb_buf_ops);
+                } else {
+                        bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
                                   XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
-                                  XFS_FSS_TO_BB(mp, 1), 0, &bp);
+                                  XFS_FSS_TO_BB(mp, 1), 0);
+                        if (bp) {
+                                bp->b_ops = &xfs_sb_buf_ops;
+                                xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
+                        } else
+                                error = ENOMEM;
+                }
+
                 if (error) {
                         xfs_warn(mp,
                 "error %d reading secondary superblock for ag %d",
@@ -409,6 +472,7 @@ xfs_growfs_data_private(
                         break;
                 }
                 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, XFS_SB_ALL_BITS);
+
                 /*
                  * If we get an error writing out the alternate superblocks,
                  * just issue a warning and continue.  The real work is
@@ -423,7 +487,7 @@ xfs_growfs_data_private(
                         break; /* no point in continuing */
                 }
         }
-        return 0;
+        return error;
 
  error0:
         xfs_trans_cancel(tp, XFS_TRANS_ABORT);