xfs: add realtime reverse map inode to metadata directory

Add a metadir path to select the realtime rmap btree inode and load
it at mount time.  The rtrmapbt inode will have a unique extent format
code, which means that we also have to update the inode validation and
flush routines to look for it.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>

diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index ef2232171829cd17c42e95c372e7ed1b0ab7b118..28501fae2c516632117bca6a25b993769d72bb97 100644 (file)
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -986,7 +986,8 @@ enum xfs_dinode_fmt {
        XFS_DINODE_FMT_LOCAL,           /* bulk data */
        XFS_DINODE_FMT_EXTENTS,         /* struct xfs_bmbt_rec */
        XFS_DINODE_FMT_BTREE,           /* struct xfs_bmdr_block */
-       XFS_DINODE_FMT_UUID             /* added long ago, but never used */
+       XFS_DINODE_FMT_UUID,            /* added long ago, but never used */
+       XFS_DINODE_FMT_RMAP,            /* reverse mapping btree */
 };
 
 #define XFS_INODE_FORMAT_STR \
@@ -994,7 +995,8 @@ enum xfs_dinode_fmt {
        { XFS_DINODE_FMT_LOCAL,         "local" }, \
        { XFS_DINODE_FMT_EXTENTS,       "extent" }, \
        { XFS_DINODE_FMT_BTREE,         "btree" }, \
-       { XFS_DINODE_FMT_UUID,          "uuid" }
+       { XFS_DINODE_FMT_UUID,          "uuid" }, \
+       { XFS_DINODE_FMT_RMAP,          "rmap" }
 
 /*
  * Max values for extnum and aextnum.

diff --git a/libxfs/xfs_inode_buf.c b/libxfs/xfs_inode_buf.c
index 98a39e0716da71133b8f64eae12de1f7ba5021f2..192d3202dcc7dde7381658ca1275d8ce404c9eed 100644 (file)
--- a/libxfs/xfs_inode_buf.c
+++ b/libxfs/xfs_inode_buf.c
@@ -431,6 +431,12 @@ xfs_dinode_verify_fork(
                if (di_nextents > max_extents)
                        return __this_address;
                break;
+       case XFS_DINODE_FMT_RMAP:
+               if (!xfs_has_rtrmapbt(mp))
+                       return __this_address;
+               if (!(dip->di_flags2 & cpu_to_be64(XFS_DIFLAG2_METADATA)))
+                       return __this_address;
+               break;
        default:
                return __this_address;
        }
@@ -450,6 +456,10 @@ xfs_dinode_verify_forkoff(
                if (dip->di_forkoff != (roundup(sizeof(xfs_dev_t), 8) >> 3))
                        return __this_address;
                break;
+       case XFS_DINODE_FMT_RMAP:
+               if (!(xfs_has_metadir(mp) && xfs_has_parent(mp)))
+                       return __this_address;
+               fallthrough;
        case XFS_DINODE_FMT_LOCAL:      /* fall through ... */
        case XFS_DINODE_FMT_EXTENTS:    /* fall through ... */
        case XFS_DINODE_FMT_BTREE:

diff --git a/libxfs/xfs_inode_fork.c b/libxfs/xfs_inode_fork.c
index 98f788901755031dd2dc6ce3534c25b8c0ea4317..1e7f81eead5be916c9a4b7540d0a5074f53e7ced 100644 (file)
--- a/libxfs/xfs_inode_fork.c
+++ b/libxfs/xfs_inode_fork.c
@@ -266,6 +266,11 @@ xfs_iformat_data_fork(
                        return xfs_iformat_extents(ip, dip, XFS_DATA_FORK);
                case XFS_DINODE_FMT_BTREE:
                        return xfs_iformat_btree(ip, dip, XFS_DATA_FORK);
+               case XFS_DINODE_FMT_RMAP:
+                       if (!xfs_has_rtrmapbt(ip->i_mount))
+                               return -EFSCORRUPTED;
+                       ASSERT(0); /* to be implemented later */
+                       return -EFSCORRUPTED;
                default:
                        xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__,
                                        dip, sizeof(*dip), __this_address);
@@ -652,6 +657,10 @@ xfs_iflush_fork(
                }
                break;
 
+       case XFS_DINODE_FMT_RMAP:
+               ASSERT(0); /* to be implemented later */
+               break;
+
        default:
                ASSERT(0);
                break;

diff --git a/libxfs/xfs_rtgroup.c b/libxfs/xfs_rtgroup.c
index da2a4d4988de008d1a83613c9ce6a52bdf1319d0..208886ccf703124109d60f1d9e13864ad8c37cbb 100644 (file)
--- a/libxfs/xfs_rtgroup.c
+++ b/libxfs/xfs_rtgroup.c
@@ -26,6 +26,7 @@
 #include "xfs_trans.h"
 #include "xfs_trace.h"
 #include "xfs_inode.h"
+#include "xfs_metafile.h"
 #include "xfs_rtgroup.h"
 #include "xfs_rtbitmap.h"
 #include "xfs_metafile.h"
@@ -500,7 +501,14 @@ xfs_rtginode_ilock_print_fn(
        const struct xfs_inode *ip =
                container_of(m, struct xfs_inode, i_lock.dep_map);
 
-       printk(KERN_CONT " rgno=%u", ip->i_projid);
+       switch (ip->i_df.if_format) {
+       case XFS_DINODE_FMT_RMAP:
+               printk(KERN_CONT " rgno=%u rmapbt", ip->i_projid);
+               break;
+       default:
+               printk(KERN_CONT " rgno=%u", ip->i_projid);
+               break;
+       }
 }
 
 /*
@@ -540,6 +548,11 @@ struct xfs_rtginode_ops {
 };
 
 static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTG_MAX] = {
+       [XFS_RTG_RMAP] = {
+               .name           = "rmap",
+               .format         = XFS_DINODE_FMT_RMAP,
+               .enabled        = xfs_has_rtrmapbt,
+       },
 };
 
 /* Return the shortname of this rtgroup inode. */

diff --git a/libxfs/xfs_rtgroup.h b/libxfs/xfs_rtgroup.h
index 88a10091fd62c3234a6402bf2009735f24ae0658..004b19fd90bbf1cafc31662ae2d7f7cb88e4976d 100644 (file)
--- a/libxfs/xfs_rtgroup.h
+++ b/libxfs/xfs_rtgroup.h
@@ -10,7 +10,7 @@ struct xfs_mount;
 struct xfs_trans;
 
 enum xfs_rtg_inodes {
-       XFS_RTG_NOTHING, /* shut up gcc */
+       XFS_RTG_RMAP,           /* rmap btree inode */
        XFS_RTG_MAX,
 };
 
@@ -245,6 +245,8 @@ int xfs_rtginode_create(struct xfs_rtgroup *rtg, enum xfs_rtg_inodes type,
                bool init);
 void xfs_rtginode_irele(struct xfs_inode **ipp);
 
+void xfs_rtginode_irele(struct xfs_inode **ipp);
+
 static inline const char *xfs_rtginode_path(xfs_rgnumber_t rgno,
                enum xfs_rtg_inodes type)
 {

diff --git a/libxfs/xfs_rtrmap_btree.c b/libxfs/xfs_rtrmap_btree.c
index 2e1232155bd963847ef1aa11b3384fd11eacc38c..2c5f37dc93ecc5c62ce3b0a40e7e0a58fa173449 100644 (file)
--- a/libxfs/xfs_rtrmap_btree.c
+++ b/libxfs/xfs_rtrmap_btree.c
@@ -24,6 +24,7 @@
 #include "xfs_cksum.h"
 #include "xfs_rtgroup.h"
 #include "xfs_bmap.h"
+#include "xfs_metafile.h"
 
 static struct kmem_cache       *xfs_rtrmapbt_cur_cache;
 
@@ -441,6 +442,7 @@ xfs_rtrmapbt_commit_staged_btree(
        int                     flags = XFS_ILOG_CORE | XFS_ILOG_DBROOT;
 
        ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
+       ASSERT(ifake->if_fork->if_format == XFS_DINODE_FMT_RMAP);
 
        /*
         * Free any resources hanging off the real fork, then shallow-copy the