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>

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 37f2d11..c4f788e 100644 (file)
--- 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 3f999b1..1672ff5 100644 (file)
--- 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 cfdac80..2ab2df5 100644 (file)
--- 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*/