[XFS] Rework fid encode/decode wrt 64 bit inums interacting with NFS.

SGI-PV: 937127
SGI-Modid: xfs-linux:xfs-kern:24201a

Signed-off-by: Nathan Scott <nathans@sgi.com>

6 files changed, 19 insertions, 12 deletions

diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index 3e97076437b..80eb249f2fa 100644
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -96,9 +96,8 @@ linvfs_encode_fh(
         int                     is64 = 0;
 #if XFS_BIG_INUMS
         vfs_t                   *vfs = LINVFS_GET_VFS(inode->i_sb);
-        xfs_mount_t             *mp = XFS_VFSTOM(vfs);
 
-        if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT)) {
+        if (!(vfs->vfs_flag & VFS_32BITINODES)) {
                 /* filesystem may contain 64bit inode numbers */
                 is64 = XFS_FILEID_TYPE_64FLAG;
         }
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index d5fb28f7d32..57caf9eddee 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -81,6 +81,7 @@ typedef enum {
 #define VFS_RDONLY              0x0001  /* read-only vfs */
 #define VFS_GRPID               0x0002  /* group-ID assigned from directory */
 #define VFS_DMI                 0x0004  /* filesystem has the DMI enabled */
+#define VFS_32BITINODES         0x0008  /* do not use inums above 32 bits */
 #define VFS_END                 0x0008  /* max flag */
 
 #define SYNC_ATTR               0x0001  /* sync attributes */
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 0ca597b0ca7..7ceabd0e2d9 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -171,7 +171,7 @@ xfs_growfs_data_private(
                 memset(&mp->m_perag[oagcount], 0,
                         (nagcount - oagcount) * sizeof(xfs_perag_t));
                 mp->m_flags |= XFS_MOUNT_32BITINODES;
-                nagimax = xfs_initialize_perag(mp, nagcount);
+                nagimax = xfs_initialize_perag(XFS_MTOVFS(mp), mp, nagcount);
                 up_write(&mp->m_peraglock);
         }
         tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 9e861d0d3ee..02b1892aaf7 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -316,7 +316,10 @@ xfs_mount_validate_sb(
 }
 
 xfs_agnumber_t
-xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount)
+xfs_initialize_perag(
+        struct vfs      *vfs,
+        xfs_mount_t     *mp,
+        xfs_agnumber_t  agcount)
 {
         xfs_agnumber_t  index, max_metadata;
         xfs_perag_t     *pag;
@@ -332,7 +335,7 @@ xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount)
         /* Clear the mount flag if no inode can overflow 32 bits
          * on this filesystem, or if specifically requested..
          */
-        if ((mp->m_flags & XFS_MOUNT_32BITINOOPT) && ino > max_inum) {
+        if ((vfs->vfs_flag & VFS_32BITINODES) && ino > max_inum) {
                 mp->m_flags |= XFS_MOUNT_32BITINODES;
         } else {
                 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
@@ -944,7 +947,7 @@ xfs_mountfs(
         mp->m_perag =
                 kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t), KM_SLEEP);
 
-        mp->m_maxagi = xfs_initialize_perag(mp, sbp->sb_agcount);
+        mp->m_maxagi = xfs_initialize_perag(vfsp, mp, sbp->sb_agcount);
 
         /*
          * log's mount-time initialization. Perform 1st part recovery if needed
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index f724a2beead..08b2e0a5d80 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -402,7 +402,7 @@ typedef struct xfs_mount {
                                                 /* osyncisdsync is now default*/
 #define XFS_MOUNT_32BITINODES   (1ULL << 14)    /* do not create inodes above
                                                  * 32 bits in size */
-#define XFS_MOUNT_32BITINOOPT   (1ULL << 15)    /* saved mount option state */
+                             /* (1ULL << 15)    -- currently unused */
 #define XFS_MOUNT_NOUUID        (1ULL << 16)    /* ignore uuid during mount */
 #define XFS_MOUNT_BARRIER       (1ULL << 17)
 #define XFS_MOUNT_IDELETE       (1ULL << 18)    /* delete empty inode clusters*/
@@ -557,7 +557,8 @@ extern void	xfs_freesb(xfs_mount_t *);
 extern void     xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
 extern int      xfs_syncsub(xfs_mount_t *, int, int, int *);
 extern int      xfs_sync_inodes(xfs_mount_t *, int, int, int *);
-extern xfs_agnumber_t   xfs_initialize_perag(xfs_mount_t *, xfs_agnumber_t);
+extern xfs_agnumber_t   xfs_initialize_perag(struct vfs *, xfs_mount_t *,
+                                                xfs_agnumber_t);
 extern void     xfs_xlatesb(void *, struct xfs_sb *, int, __int64_t);
 
 extern struct xfs_dmops xfs_dmcore_stub;
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index f4f8805e25b..dd419e1d71b 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -269,7 +269,7 @@ xfs_start_flags(
         if (ap->flags & XFSMNT_OSYNCISOSYNC)
                 mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
         if (ap->flags & XFSMNT_32BITINODES)
-                mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
+                mp->m_flags |= XFS_MOUNT_32BITINODES;
 
         if (ap->flags & XFSMNT_IOSIZE) {
                 if (ap->iosizelog > XFS_MAX_IO_LOG ||
@@ -1868,6 +1868,9 @@ printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
                 args->sunit = args->swidth = 0;
         }
 
+        if (args->flags & XFSMNT_32BITINODES)
+                vfsp->vfs_flag |= VFS_32BITINODES;
+
         if (args->flags2)
                 args->flags |= XFSMNT_FLAGS2;
         return 0;
@@ -1929,15 +1932,15 @@ xfs_showargs(
                 seq_printf(m, "," MNTOPT_SWIDTH "=%d",
                                 (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
 
-        if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
-                seq_printf(m, "," MNTOPT_64BITINODE);
-
         if (!(mp->m_flags & XFS_MOUNT_COMPAT_ATTR))
                 seq_printf(m, "," MNTOPT_ATTR2);
 
         if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE))
                 seq_printf(m, "," MNTOPT_LARGEIO);
 
+        if (!(vfsp->vfs_flag & VFS_32BITINODES))
+                seq_printf(m, "," MNTOPT_64BITINODE);
+
         if (vfsp->vfs_flag & VFS_GRPID)
                 seq_printf(m, "," MNTOPT_GRPID);