xfs: add realtime reverse map inode to metadata directory

Source kernel commit: 7dbfdba02ee58377503d271a9dac7f9b761b6d7f

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>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index 58aef1e39ab9f6e31f4a79b19709faac872ec55d..ab0336ffb767662fee1f8d26c81c2b25d37a3e88 100644 (file)
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -867,6 +867,7 @@ enum xfs_metafile_type {
        XFS_METAFILE_PRJQUOTA,          /* project quota */
        XFS_METAFILE_RTBITMAP,          /* rt bitmap */
        XFS_METAFILE_RTSUMMARY,         /* rt summary */
+       XFS_METAFILE_RTRMAP,            /* rt rmap */
 
        XFS_METAFILE_MAX
 };
@@ -878,7 +879,8 @@ enum xfs_metafile_type {
        { XFS_METAFILE_GRPQUOTA,        "grpquota" }, \
        { XFS_METAFILE_PRJQUOTA,        "prjquota" }, \
        { XFS_METAFILE_RTBITMAP,        "rtbitmap" }, \
-       { XFS_METAFILE_RTSUMMARY,       "rtsummary" }
+       { XFS_METAFILE_RTSUMMARY,       "rtsummary" }, \
+       { XFS_METAFILE_RTRMAP,          "rtrmap" }
 
 /*
  * On-disk inode structure.
@@ -1010,7 +1012,8 @@ 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 \
@@ -1018,7 +1021,8 @@ 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 d10bbdd7d3795176c4c0f96a31ab6d19bfe54712..3732636fdd09d7bff13688668be55d5cfe9ab62d 100644 (file)
--- a/libxfs/xfs_inode_buf.c
+++ b/libxfs/xfs_inode_buf.c
@@ -436,6 +436,12 @@ 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;
        }
@@ -455,6 +461,10 @@ 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 6a78dc66be092a9b00fb10732d27453e31f9a41f..983b8a4902c90395f8af786aa70b8621a4c51b0e 100644 (file)
--- a/libxfs/xfs_rtgroup.c
+++ b/libxfs/xfs_rtgroup.c
@@ -308,7 +308,14 @@ 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;
+       }
 }
 
 /*
@@ -339,6 +346,7 @@ struct xfs_rtginode_ops {
        enum xfs_metafile_type  metafile_type;
 
        unsigned int            sick;   /* rtgroup sickness flag */
+       int8_t                  format; /* data fork format */
 
        /* Does the fs have this feature? */
        bool                    (*enabled)(struct xfs_mount *mp);
@@ -363,6 +371,12 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTG_MAX] = {
                .sick           = XFS_SICK_RG_SUMMARY,
                .create         = xfs_rtsummary_create,
        },
+       [XFS_RTG_RMAP] = {
+               .name           = "rmap",
+               .metafile_type  = XFS_METAFILE_RTRMAP,
+               .format         = XFS_DINODE_FMT_RMAP,
+               .enabled        = xfs_has_rtrmapbt,
+       },
 };
 
 /* Return the shortname of this rtgroup inode. */
@@ -456,6 +470,13 @@ xfs_rtginode_load(
                return error;
        }
 
+       if (ops->format &&
+           XFS_IS_CORRUPT(mp, ip->i_df.if_format != ops->format)) {
+               xfs_irele(ip);
+               xfs_rtgroup_mark_sick(rtg, ops->sick);
+               return -EFSCORRUPTED;
+       }
+
        if (XFS_IS_CORRUPT(mp, ip->i_projid != rtg->rtg_rgno)) {
                xfs_irele(ip);
                xfs_rtginode_mark_sick(rtg, type);

diff --git a/libxfs/xfs_rtgroup.h b/libxfs/xfs_rtgroup.h
index e45e2b94dfe5082b20c4388f9688a4e864b69449..b640399296ddfb7ae0e04e1556b0fd04de5bf740 100644 (file)
--- a/libxfs/xfs_rtgroup.h
+++ b/libxfs/xfs_rtgroup.h
@@ -12,6 +12,7 @@ struct xfs_trans;
 enum xfs_rtg_inodes {
        XFS_RTG_BITMAP,         /* allocation bitmap */
        XFS_RTG_SUMMARY,        /* allocation summary */
+       XFS_RTG_RMAP,           /* rmap btree inode */
 
        XFS_RTG_MAX,
 };
@@ -316,6 +317,8 @@ 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..e421635afcab2e30f7d895d3a790b367ea4d5625 100644 (file)
--- a/libxfs/xfs_rtrmap_btree.c
+++ b/libxfs/xfs_rtrmap_btree.c
@@ -18,6 +18,7 @@
 #include "xfs_alloc.h"
 #include "xfs_btree.h"
 #include "xfs_btree_staging.h"
+#include "xfs_metafile.h"
 #include "xfs_rmap.h"
 #include "xfs_rtrmap_btree.h"
 #include "xfs_trace.h"
@@ -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