[XFS] Write log dummy record when freezing filesystem

[linux-2.6-omap-h63xx.git] / fs / xfs / xfs_vfsops.c

diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 7bdbd991ab1cdd63300cc1eb7897b469d1a11abf..dcdb0a8578e174078a8540e3ece88a75baa4f64d 100644 (file)
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -53,6 +53,7 @@
 #include "xfs_acl.h"
 #include "xfs_attr.h"
 #include "xfs_clnt.h"
+#include "xfs_fsops.h"
 
 STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
 
@@ -312,6 +313,8 @@ xfs_start_flags(
                mp->m_flags |= XFS_MOUNT_NOUUID;
        if (ap->flags & XFSMNT_BARRIER)
                mp->m_flags |= XFS_MOUNT_BARRIER;
+       else
+               mp->m_flags &= ~XFS_MOUNT_BARRIER;
 
        return 0;
 }
@@ -504,13 +507,14 @@ xfs_mount(
        if (error)
                goto error2;
 
+       if ((mp->m_flags & XFS_MOUNT_NOATIME) &&
+           !(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY))
+               xfs_mountfs_check_barriers(mp);
+
        error = XFS_IOINIT(vfsp, args, flags);
        if (error)
                goto error2;
 
-       if ((args->flags & XFSMNT_BARRIER) &&
-           !(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY))
-               xfs_mountfs_check_barriers(mp);
        return 0;
 
 error2:
@@ -655,6 +659,11 @@ xfs_mntupdate(
        else
                mp->m_flags &= ~XFS_MOUNT_NOATIME;
 
+       if (args->flags & XFSMNT_BARRIER)
+               mp->m_flags |= XFS_MOUNT_BARRIER;
+       else
+               mp->m_flags &= ~XFS_MOUNT_BARRIER;
+
        if ((vfsp->vfs_flag & VFS_RDONLY) &&
            !(*flags & MS_RDONLY)) {
                vfsp->vfs_flag &= ~VFS_RDONLY;
@@ -1634,6 +1643,7 @@ xfs_vget(
 #define MNTOPT_NORECOVERY   "norecovery"   /* don't run XFS recovery */
 #define MNTOPT_BARRIER "barrier"       /* use writer barriers for log write and
                                         * unwritten extent conversion */
+#define MNTOPT_NOBARRIER "nobarrier"   /* .. disable */
 #define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */
 #define MNTOPT_64BITINODE   "inode64"  /* inodes can be allocated anywhere */
 #define MNTOPT_IKEEP   "ikeep"         /* do not free empty inode clusters */
@@ -1681,6 +1691,7 @@ xfs_parseargs(
 
        args->flags2 |= XFSMNT2_COMPAT_IOSIZE;
        args->flags |= XFSMNT_COMPAT_ATTR;
+       args->flags |= XFSMNT_BARRIER;
 
 #if 0  /* XXX: off by default, until some remaining issues ironed out */
        args->flags |= XFSMNT_IDELETE; /* default to on */
@@ -1806,6 +1817,8 @@ xfs_parseargs(
                        args->flags |= XFSMNT_NOUUID;
                } else if (!strcmp(this_char, MNTOPT_BARRIER)) {
                        args->flags |= XFSMNT_BARRIER;
+               } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) {
+                       args->flags &= ~XFSMNT_BARRIER;
                } else if (!strcmp(this_char, MNTOPT_IKEEP)) {
                        args->flags &= ~XFSMNT_IDELETE;
                } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) {
@@ -1892,7 +1905,6 @@ xfs_showargs(
                { XFS_MOUNT_NOUUID,             "," MNTOPT_NOUUID },
                { XFS_MOUNT_NORECOVERY,         "," MNTOPT_NORECOVERY },
                { XFS_MOUNT_OSYNCISOSYNC,       "," MNTOPT_OSYNCISOSYNC },
-               { XFS_MOUNT_BARRIER,            "," MNTOPT_BARRIER },
                { XFS_MOUNT_IDELETE,            "," MNTOPT_NOIKEEP },
                { 0, NULL }
        };
@@ -1914,33 +1926,30 @@ xfs_showargs(
 
        if (mp->m_logbufs > 0)
                seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
-
        if (mp->m_logbsize > 0)
                seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
 
        if (mp->m_logname)
                seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
-
        if (mp->m_rtname)
                seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
 
        if (mp->m_dalign > 0)
                seq_printf(m, "," MNTOPT_SUNIT "=%d",
                                (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
-
        if (mp->m_swidth > 0)
                seq_printf(m, "," MNTOPT_SWIDTH "=%d",
                                (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
 
        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 (!(mp->m_flags & XFS_MOUNT_BARRIER))
+               seq_printf(m, "," MNTOPT_NOBARRIER);
 
        if (!(vfsp->vfs_flag & VFS_32BITINODES))
                seq_printf(m, "," MNTOPT_64BITINODE);
-
        if (vfsp->vfs_flag & VFS_GRPID)
                seq_printf(m, "," MNTOPT_GRPID);
 
@@ -1959,6 +1968,7 @@ xfs_freeze(
        /* Push the superblock and write an unmount record */
        xfs_log_unmount_write(mp);
        xfs_unmountfs_writesb(mp);
+       xfs_fs_log_dummy(mp);
 }