remove leftovers of shared read-only support

We never supported shared read-only filesystems, so remove the dead
code left over from IRIX for it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>

3 files changed, 0 insertions, 57 deletions

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 37f2d11be4ac..c4f788e11197 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1388,35 +1388,6 @@ xfs_finish_flags(
                 return XFS_ERROR(EROFS);
         }
 
-#if 0 /* shared mounts were never supported on Linux */
-        /*
-         * check for shared mount.
-         */
-        if (ap->flags & XFSMNT_SHARED) {
-                if (!xfs_sb_version_hasshared(&mp->m_sb))
-                        return XFS_ERROR(EINVAL);
-
-                /*
-                 * For IRIX 6.5, shared mounts must have the shared
-                 * version bit set, have the persistent readonly
-                 * field set, must be version 0 and can only be mounted
-                 * read-only.
-                 */
-                if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) ||
-                     (mp->m_sb.sb_shared_vn != 0))
-                        return XFS_ERROR(EINVAL);
-
-                mp->m_flags |= XFS_MOUNT_SHARED;
-
-                /*
-                 * Shared XFS V0 can't deal with DMI.  Return EINVAL.
-                 */
-                if (mp->m_sb.sb_shared_vn == 0 &&
-                    (mp->m_flags & XFS_MOUNT_DMAPI))
-                        return XFS_ERROR(EINVAL);
-        }
-#endif
-
         return 0;
 }
 
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 3f999b1c0385..1672ff56a009 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1352,24 +1352,6 @@ xfs_log_sbcount(
         return error;
 }
 
-STATIC void
-xfs_mark_shared_ro(
-        xfs_mount_t     *mp,
-        xfs_buf_t       *bp)
-{
-        xfs_dsb_t       *sb = XFS_BUF_TO_SBP(bp);
-        __uint16_t      version;
-
-        if (!(sb->sb_flags & XFS_SBF_READONLY))
-                sb->sb_flags |= XFS_SBF_READONLY;
-
-        version = be16_to_cpu(sb->sb_versionnum);
-        if ((version & XFS_SB_VERSION_NUMBITS) != XFS_SB_VERSION_4 ||
-            !(version & XFS_SB_VERSION_SHAREDBIT))
-                version |= XFS_SB_VERSION_SHAREDBIT;
-        sb->sb_versionnum = cpu_to_be16(version);
-}
-
 int
 xfs_unmountfs_writesb(xfs_mount_t *mp)
 {
@@ -1385,12 +1367,6 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
 
                 sbp = xfs_getsb(mp, 0);
 
-                /*
-                 * mark shared-readonly if desired
-                 */
-                if (mp->m_mk_sharedro)
-                        xfs_mark_shared_ro(mp, sbp);
-
                 XFS_BUF_UNDONE(sbp);
                 XFS_BUF_UNREAD(sbp);
                 XFS_BUF_UNDELAYWRITE(sbp);
@@ -1402,8 +1378,6 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
                 if (error)
                         xfs_ioerror_alert("xfs_unmountfs_writesb",
                                           mp, sbp, XFS_BUF_ADDR(sbp));
-                if (error && mp->m_mk_sharedro)
-                        xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting.  Filesystem may not be marked shared readonly");
                 xfs_buf_relse(sbp);
         }
         return error;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index cfdac80f4fc6..2ab2df57b69a 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -301,7 +301,6 @@ typedef struct xfs_mount {
         int                     m_sinoalign;    /* stripe unit inode alignment */
         int                     m_attr_magicpct;/* 37% of the blocksize */
         int                     m_dir_magicpct; /* 37% of the dir blocksize */
-        __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */
         __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */
         const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
         int                     m_dirblksize;   /* directory block sz--bytes */
@@ -349,7 +348,6 @@ typedef struct xfs_mount {
 #define XFS_MOUNT_ATTR2         (1ULL << 8)     /* allow use of attr2 format */
 #define XFS_MOUNT_GRPID         (1ULL << 9)     /* group-ID assigned from directory */
 #define XFS_MOUNT_NORECOVERY    (1ULL << 10)    /* no recovery - dirty fs */
-#define XFS_MOUNT_SHARED        (1ULL << 11)    /* shared mount */
 #define XFS_MOUNT_DFLT_IOSIZE   (1ULL << 12)    /* set default i/o size */
 #define XFS_MOUNT_OSYNCISOSYNC  (1ULL << 13)    /* o_sync is REALLY o_sync */
                                                 /* osyncisdsync is now default*/