[PATCH 13/15] xfs: move inode generation count to VFS inode

[Dave Chinner <david@xxxxxxxxxxxxx>]

From: Dave Chinner <dchinner@xxxxxxxxxx>

Source kernel commit 9e9a2674e43353f650ecd19a54eba028eafff82e

Pull another 4 bytes out of the xfs_icdinode.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Dave Chinner <david@xxxxxxxxxxxxx>
---
 include/xfs_inode.h    | 1 +
 libxfs/util.c          | 5 +----
 libxfs/xfs_inode_buf.c | 8 ++++----
 libxfs/xfs_inode_buf.h | 1 -
 4 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/include/xfs_inode.h b/include/xfs_inode.h
index e7aa9e9..f7ad924 100644
--- a/include/xfs_inode.h
+++ b/include/xfs_inode.h
@@ -35,6 +35,7 @@ struct xfs_dir_ops;
  */
 struct inode {
        uint32_t        i_nlink;
+       uint32_t        i_generation;
        struct timespec i_atime;
        struct timespec i_mtime;
        struct timespec i_ctime;
diff --git a/libxfs/util.c b/libxfs/util.c
index 9327a62..3263ae7 100644
--- a/libxfs/util.c
+++ b/libxfs/util.c
@@ -247,9 +247,6 @@ libxfs_ialloc(
        ip->i_d.di_size = 0;
        ip->i_d.di_nextents = 0;
        ASSERT(ip->i_d.di_nblocks == 0);
-       /*
-        * di_gen will have been taken care of in xfs_iread.
-        */
        ip->i_d.di_extsize = pip ? 0 : fsx->fsx_extsize;
        ip->i_d.di_dmevmask = 0;
        ip->i_d.di_dmstate = 0;
@@ -391,7 +388,7 @@ libxfs_iprint(
        printf("   di_gid %d\n", dip->di_gid);
        printf("   di_nextents %d\n", dip->di_nextents);
        printf("   di_size %llu\n", (unsigned long long)dip->di_size);
-       printf("   di_gen %x\n", dip->di_gen);
+       printf("   di_gen %x\n", VFS_I(ip)->i_generation);
        printf("   di_extsize %d\n", dip->di_extsize);
        printf("   di_flags %x\n", dip->di_flags);
        printf("   di_nblocks %llu\n", (unsigned long long)dip->di_nblocks);
diff --git a/libxfs/xfs_inode_buf.c b/libxfs/xfs_inode_buf.c
index dba8a4b..224edd3 100644
--- a/libxfs/xfs_inode_buf.c
+++ b/libxfs/xfs_inode_buf.c
@@ -246,6 +246,7 @@ xfs_inode_from_disk(
        inode->i_mtime.tv_nsec = (int)be32_to_cpu(from->di_mtime.t_nsec);
        inode->i_ctime.tv_sec = (int)be32_to_cpu(from->di_ctime.t_sec);
        inode->i_ctime.tv_nsec = (int)be32_to_cpu(from->di_ctime.t_nsec);
+       inode->i_generation = be32_to_cpu(from->di_gen);
 
        to->di_size = be64_to_cpu(from->di_size);
        to->di_nblocks = be64_to_cpu(from->di_nblocks);
@@ -257,7 +258,6 @@ xfs_inode_from_disk(
        to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
        to->di_dmstate  = be16_to_cpu(from->di_dmstate);
        to->di_flags    = be16_to_cpu(from->di_flags);
-       to->di_gen      = be32_to_cpu(from->di_gen);
 
        if (to->di_version == 3) {
                to->di_changecount = be64_to_cpu(from->di_changecount);
@@ -295,6 +295,7 @@ xfs_inode_to_disk(
        to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec);
        to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
        to->di_nlink = cpu_to_be32(inode->i_nlink);
+       to->di_gen = cpu_to_be32(inode->i_generation);
 
        to->di_size = cpu_to_be64(from->di_size);
        to->di_nblocks = cpu_to_be64(from->di_nblocks);
@@ -306,7 +307,6 @@ xfs_inode_to_disk(
        to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
        to->di_dmstate = cpu_to_be16(from->di_dmstate);
        to->di_flags = cpu_to_be16(from->di_flags);
-       to->di_gen = cpu_to_be32(from->di_gen);
 
        if (from->di_version == 3) {
                to->di_changecount = cpu_to_be64(from->di_changecount);
@@ -452,7 +452,7 @@ xfs_iread(
            !(mp->m_flags & XFS_MOUNT_IKEEP)) {
                /* initialise the on-disk inode core */
                memset(&ip->i_d, 0, sizeof(ip->i_d));
-               ip->i_d.di_gen = prandom_u32();
+               VFS_I(ip)->i_generation = prandom_u32();
                if (xfs_sb_version_hascrc(&mp->m_sb))
                        ip->i_d.di_version = 3;
                else
@@ -500,7 +500,7 @@ xfs_iread(
                 * that xfs_ialloc won't overwrite or relies on being correct.
                 */
                ip->i_d.di_version = dip->di_version;
-               ip->i_d.di_gen = be32_to_cpu(dip->di_gen);
+               VFS_I(ip)->i_generation = be32_to_cpu(dip->di_gen);
                ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
 
                /*
diff --git a/libxfs/xfs_inode_buf.h b/libxfs/xfs_inode_buf.h
index ccc4052..83ae8ed 100644
--- a/libxfs/xfs_inode_buf.h
+++ b/libxfs/xfs_inode_buf.h
@@ -46,7 +46,6 @@ struct xfs_icdinode {
        __uint32_t      di_dmevmask;    /* DMIG event mask */
        __uint16_t      di_dmstate;     /* DMIG state info */
        __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
-       __uint32_t      di_gen;         /* generation number */
 
        __uint64_t      di_changecount; /* number of attribute changes */
        __uint64_t      di_flags2;      /* more random flags */
-- 
2.7.0