[XFS] Track external log/realtime device names for correct reporting in

/proc/mounts.

SGI-PV: 942984
SGI-Modid: xfs-linux:xfs-kern:23862a

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

5 files changed, 29 insertions, 13 deletions

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index b9d3ad35240e..fcde2a2fc457 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -483,7 +483,8 @@ xfs_log_mount(xfs_mount_t	*mp,
 
 #if defined(DEBUG) || defined(XLOG_NOLOG)
         if (!xlog_debug) {
-                cmn_err(CE_NOTE, "log dev: %s", XFS_BUFTARG_NAME(log_target));
+                cmn_err(CE_NOTE, "logdev: %s", mp->m_logname ?
+                        mp->m_logname : "internal");
                 return 0;
         }
 #endif
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 14faabaabf29..212c5411595e 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -2226,8 +2226,9 @@ xlog_recover_do_buffer_trans(
                 break;
         default:
                 xfs_fs_cmn_err(CE_ALERT, log->l_mp,
-                        "xfs_log_recover: unknown buffer type 0x%x, dev %s",
-                        buf_f->blf_type, XFS_BUFTARG_NAME(log->l_targ));
+                        "xfs_log_recover: unknown buffer type 0x%x, logdev %s",
+                        buf_f->blf_type, log->l_mp->m_logname ?
+                        log->l_mp->m_logname : "internal");
                 XFS_ERROR_REPORT("xlog_recover_do_buffer_trans",
                                  XFS_ERRLEVEL_LOW, log->l_mp);
                 return XFS_ERROR(EFSCORRUPTED);
@@ -3938,8 +3939,9 @@ xlog_recover(
                 }
 
                 cmn_err(CE_NOTE,
-                        "Starting XFS recovery on filesystem: %s (dev: %s)",
-                        log->l_mp->m_fsname, XFS_BUFTARG_NAME(log->l_targ));
+                        "Starting XFS recovery on filesystem: %s (logdev: %s)",
+                        log->l_mp->m_fsname, log->l_mp->m_logname ?
+                        log->l_mp->m_logname : "internal");
 
                 error = xlog_do_recover(log, head_blk, tail_blk);
                 log->l_flags |= XLOG_RECOVERY_NEEDED;
@@ -3987,8 +3989,9 @@ xlog_recover_finish(
                 xlog_recover_check_summary(log);
 
                 cmn_err(CE_NOTE,
-                        "Ending XFS recovery on filesystem: %s (dev: %s)",
-                        log->l_mp->m_fsname, XFS_BUFTARG_NAME(log->l_targ));
+                        "Ending XFS recovery on filesystem: %s (logdev: %s)",
+                        log->l_mp->m_fsname, log->l_mp->m_logname ?
+                        log->l_mp->m_logname : "internal");
                 log->l_flags &= ~XLOG_RECOVERY_NEEDED;
         } else {
                 cmn_err(CE_DEBUG,
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index a93ef802db6b..4f26172a163e 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -180,6 +180,10 @@ xfs_mount_free(
 
         if (mp->m_fsname != NULL)
                 kmem_free(mp->m_fsname, mp->m_fsname_len);
+        if (mp->m_rtname != NULL)
+                kmem_free(mp->m_rtname, strlen(mp->m_rtname) + 1);
+        if (mp->m_logname != NULL)
+                kmem_free(mp->m_logname, strlen(mp->m_logname) + 1);
 
         if (remove_bhv) {
                 struct vfs      *vfsp = XFS_MTOVFS(mp);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 5c5e7bf4a8a9..7341f4984c08 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -292,6 +292,8 @@ typedef struct xfs_mount {
         struct xfs_buf          *m_sb_bp;       /* buffer for superblock */
         char                    *m_fsname;      /* filesystem name */
         int                     m_fsname_len;   /* strlen of fs name */
+        char                    *m_rtname;      /* realtime device name */
+        char                    *m_logname;     /* external log device name */
         int                     m_bsize;        /* fs logical block size */
         xfs_agnumber_t          m_agfrotor;     /* last ag where space found */
         xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 07779c5ab42f..200e0c50acf2 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -257,6 +257,14 @@ xfs_start_flags(
         mp->m_fsname_len = strlen(ap->fsname) + 1;
         mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP);
         strcpy(mp->m_fsname, ap->fsname);
+        if (ap->rtname[0]) {
+                mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP);
+                strcpy(mp->m_rtname, ap->rtname);
+        }
+        if (ap->logname[0]) {
+                mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP);
+                strcpy(mp->m_logname, ap->logname);
+        }
 
         if (ap->flags & XFSMNT_WSYNC)
                 mp->m_flags |= XFS_MOUNT_WSYNC;
@@ -1914,13 +1922,11 @@ xfs_showargs(
         if (mp->m_logbsize > 0)
                 seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
 
-        if (mp->m_ddev_targp != mp->m_logdev_targp)
-                seq_printf(m, "," MNTOPT_LOGDEV "=%s",
-                                XFS_BUFTARG_NAME(mp->m_logdev_targp));
+        if (mp->m_logname)
+                seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
 
-        if (mp->m_rtdev_targp && mp->m_ddev_targp != mp->m_rtdev_targp)
-                seq_printf(m, "," MNTOPT_RTDEV "=%s",
-                                XFS_BUFTARG_NAME(mp->m_rtdev_targp));
+        if (mp->m_rtname)
+                seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
 
         if (mp->m_dalign > 0)
                 seq_printf(m, "," MNTOPT_SUNIT "=%d",