[PATCH] xfsdump support for 64K page size

[Bill Kendall <wkendall@xxxxxxx>]

Various fixes to allow xfsdump/xfsrestore to work with 64K
page size. This is essentially Chinner's patch from a while
back.

Signed-off-by: Bill Kendall <wkendall@xxxxxxx>
---
 xfsdump/dump/content.c      |    2 +-
 xfsdump/restore/inomap.c    |    6 ------
 xfsprogs/libhandle/handle.c |    5 ++++-
 xfsprogs/libhandle/jdm.c    |    4 ++++
 4 files changed, 9 insertions(+), 8 deletions(-)

Index: xfs-cmds/xfsdump/restore/inomap.c
===================================================================
--- xfs-cmds.orig/xfsdump/restore/inomap.c
+++ xfs-cmds/xfsdump/restore/inomap.c
@@ -197,8 +197,6 @@ inomap_restore_pers( drive_t *drivep,
         */
        ASSERT( INOPERSEG == ( sizeof( (( seg_t * )0 )->lobits ) * NBBY ));
        ASSERT( sizeof( hnk_t ) == HNKSZ );
-       ASSERT( HNKSZ >= pgsz );
-       ASSERT( ! ( HNKSZ % pgsz ));
        ASSERT( sizeof( pers_t ) <= PERSSZ );
 
        /* get inomap info from media hdr
@@ -224,8 +222,6 @@ inomap_restore_pers( drive_t *drivep,
 
        /* mmap the persistent hdr and space for the map
         */
-       ASSERT( sizeof( hnk_t ) * ( size_t )hnkcnt >= pgsz );
-       ASSERT( ! ( sizeof( hnk_t ) * ( size_t )hnkcnt % pgsz ));
        persp = ( pers_t * ) mmap_autogrow(
                                     PERSSZ
                                     +
@@ -355,8 +351,6 @@ inomap_sync_pers( char *hkdir )
        /* sanity checks
         */
        ASSERT( sizeof( hnk_t ) == HNKSZ );
-       ASSERT( HNKSZ >= pgsz );
-       ASSERT( ! ( HNKSZ % pgsz ));
 
        /* only needed once per session
         */
Index: xfs-cmds/xfsdump/dump/content.c
===================================================================
--- xfs-cmds.orig/xfsdump/dump/content.c
+++ xfs-cmds/xfsdump/dump/content.c
@@ -210,7 +210,7 @@ typedef struct extent_group_context exte
 
 /* minimum sizes for extended attributes buffers
  */
-#define EXTATTR_LISTBUF_SZ     ( 4 * pgsz )
+#define EXTATTR_LISTBUF_SZ     ( XATTR_LIST_MAX )
 #define EXTATTR_RTRVARRAY_LEN  ( 1 * pgsz )
 #define EXTATTR_DUMPBUF_SZ     ( 4 * pgsz )
 
Index: xfs-cmds/xfsprogs/libhandle/handle.c
===================================================================
--- xfs-cmds.orig/xfsprogs/libhandle/handle.c
+++ xfs-cmds/xfsprogs/libhandle/handle.c
@@ -360,8 +360,11 @@ attr_list_by_handle(
 
        memcpy(&alhreq.pos, cursor, sizeof(alhreq.pos));
        alhreq.flags = flags;
-       alhreq.buflen = bufsize;
        alhreq.buffer = buf;
+       alhreq.buflen = bufsize;
+       /* prevent needless EINVAL from the kernel */
+       if (alhreq.buflen > XATTR_LIST_MAX)
+               alhreq.buflen = XATTR_LIST_MAX;
 
        error = xfsctl(path, fd, XFS_IOC_ATTRLIST_BY_HANDLE, &alhreq);
 
Index: xfs-cmds/xfsprogs/libhandle/jdm.c
===================================================================
--- xfs-cmds.orig/xfsprogs/libhandle/jdm.c
+++ xfs-cmds/xfsprogs/libhandle/jdm.c
@@ -166,6 +166,10 @@ jdm_attr_list(     jdm_fshandle_t *fshp,
        filehandle_t filehandle;
        int rval;
 
+       /* prevent needless EINVAL from the kernel */
+       if (bufsz > XATTR_LIST_MAX)
+               bufsz = XATTR_LIST_MAX;
+
        jdm_fill_filehandle( &filehandle, fshandlep, statp );
        rval = attr_list_by_handle (( void * )&filehandle,
                        sizeof( filehandle ),