[XFS] Remove old, broken nolog-mode code - noone plans to ever fix it.

SGI-PV: 944821
SGI-Modid: xfs-linux:xfs-kern:24213a

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

4 files changed, 39 insertions, 168 deletions

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index a9e0c38d18a4..29af51275ca9 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -111,8 +111,7 @@ STATIC xlog_ticket_t	*xlog_ticket_get(xlog_t *log,
                                          uint   flags);
 STATIC void             xlog_ticket_put(xlog_t *log, xlog_ticket_t *ticket);
 
-/* local debug functions */
-#if defined(DEBUG) && !defined(XLOG_NOLOG)
+#if defined(DEBUG)
 STATIC void     xlog_verify_dest_ptr(xlog_t *log, __psint_t ptr);
 STATIC void     xlog_verify_grant_head(xlog_t *log, int equals);
 STATIC void     xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog,
@@ -128,26 +127,7 @@ STATIC void	xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog,
 
 STATIC int      xlog_iclogs_empty(xlog_t *log);
 
-#ifdef DEBUG
-int xlog_do_error = 0;
-int xlog_req_num  = 0;
-int xlog_error_mod = 33;
-#endif
-
-#define XLOG_FORCED_SHUTDOWN(log)       (log->l_flags & XLOG_IO_ERROR)
-
-/*
- * 0 => disable log manager
- * 1 => enable log manager
- * 2 => enable log manager and log debugging
- */
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-int   xlog_debug = 1;
-xfs_buftarg_t *xlog_target;
-#endif
-
 #if defined(XFS_LOG_TRACE)
-
 void
 xlog_trace_loggrant(xlog_t *log, xlog_ticket_t *tic, xfs_caddr_t string)
 {
@@ -183,31 +163,16 @@ xlog_trace_loggrant(xlog_t *log, xlog_ticket_t *tic, xfs_caddr_t string)
 void
 xlog_trace_iclog(xlog_in_core_t *iclog, uint state)
 {
-        pid_t pid;
-
-        pid = current_pid();
-
         if (!iclog->ic_trace)
                 iclog->ic_trace = ktrace_alloc(256, KM_SLEEP);
         ktrace_enter(iclog->ic_trace,
                      (void *)((unsigned long)state),
-                     (void *)((unsigned long)pid),
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0,
-                     (void *)0);
+                     (void *)((unsigned long)current_pid()),
+                     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+                     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+                     (void *)NULL, (void *)NULL, (void *)NULL, (void *)NULL,
+                     (void *)NULL, (void *)NULL);
 }
-
 #else
 #define xlog_trace_loggrant(log,tic,string)
 #define xlog_trace_iclog(iclog,state)
@@ -244,11 +209,6 @@ xfs_log_done(xfs_mount_t	*mp,
         xlog_ticket_t   *ticket = (xfs_log_ticket_t) xtic;
         xfs_lsn_t       lsn     = 0;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return 0;
-#endif
-
         if (XLOG_FORCED_SHUTDOWN(log) ||
             /*
              * If nothing was ever written, don't write out commit record.
@@ -316,11 +276,6 @@ _xfs_log_force(
         if (!log_flushed)
                 log_flushed = &dummy;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return 0;
-#endif
-
         ASSERT(flags & XFS_LOG_FORCE);
 
         XFS_STATS_INC(xs_log_force);
@@ -348,10 +303,6 @@ xfs_log_notify(xfs_mount_t	  *mp,		/* mount of partition */
         xlog_in_core_t    *iclog = (xlog_in_core_t *)iclog_hndl;
         int     abortflg, spl;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return 0;
-#endif
         cb->cb_next = NULL;
         spl = LOG_LOCK(log);
         abortflg = (iclog->ic_state & XLOG_STATE_IOERROR);
@@ -402,13 +353,8 @@ xfs_log_reserve(xfs_mount_t	 *mp,
 {
         xlog_t          *log = mp->m_log;
         xlog_ticket_t   *internal_ticket;
-        int             retval;
+        int             retval = 0;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return 0;
-#endif
-        retval = 0;
         ASSERT(client == XFS_TRANSACTION || client == XFS_LOG);
         ASSERT((flags & XFS_LOG_NOSLEEP) == 0);
 
@@ -470,13 +416,6 @@ xfs_log_mount(xfs_mount_t	*mp,
 
         mp->m_log = xlog_alloc_log(mp, log_target, blk_offset, num_bblks);
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug) {
-                cmn_err(CE_NOTE, "logdev: %s", mp->m_logname ?
-                        mp->m_logname : "internal");
-                return 0;
-        }
-#endif
         /*
          * skip log recovery on a norecovery mount.  pretend it all
          * just worked.
@@ -580,11 +519,6 @@ xfs_log_unmount_write(xfs_mount_t *mp)
             __uint32_t pad2; /* may as well make it 64 bits */
         } magic = { XLOG_UNMOUNT_TYPE, 0, 0 };
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return 0;
-#endif
-
         /*
          * Don't write out unmount record on read-only mounts.
          * Or, if we are doing a forced umount (typically because of IO errors).
@@ -711,12 +645,6 @@ xfs_log_write(xfs_mount_t *	mp,
         int     error;
         xlog_t *log = mp->m_log;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ) {
-                *start_lsn = 0;
-                return 0;
-        }
-#endif
         if (XLOG_FORCED_SHUTDOWN(log))
                 return XFS_ERROR(EIO);
 
@@ -736,11 +664,6 @@ xfs_log_move_tail(xfs_mount_t	*mp,
         int             need_bytes, free_bytes, cycle, bytes;
         SPLDECL(s);
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        if (!xlog_debug && xlog_target == log->l_targ)
-                return;
-#endif
-        /* XXXsup tmp */
         if (XLOG_FORCED_SHUTDOWN(log))
                 return;
         ASSERT(!XFS_FORCED_SHUTDOWN(mp));
@@ -1027,51 +950,22 @@ xlog_get_iclog_buffer_size(xfs_mount_t	*mp,
         int size;
         int xhdrs;
 
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-        /*
-         * When logbufs == 0, someone has disabled the log from the FSTAB
-         * file.  This is not a documented feature.  We need to set xlog_debug
-         * to zero (this deactivates the log) and set xlog_target to the
-         * appropriate device.  Only one filesystem may be affected as such
-         * since this is just a performance hack to test what we might be able
-         * to get if the log were not present.
-         */
-        if (mp->m_logbufs == 0) {
-                xlog_debug = 0;
-                xlog_target = log->l_targ;
-                log->l_iclog_bufs = XLOG_MIN_ICLOGS;
-        } else
-#endif
-        {
-                /*
-                 * This is the normal path.  If m_logbufs == -1, then the
-                 * admin has chosen to use the system defaults for logbuffers.
-                 */
-                if (mp->m_logbufs == -1) { 
-                        if (xfs_physmem <= btoc(128*1024*1024)) { 
-                                log->l_iclog_bufs = XLOG_MIN_ICLOGS; 
-                        } else if (xfs_physmem <= btoc(400*1024*1024)) { 
-                                log->l_iclog_bufs = XLOG_MED_ICLOGS; 
-                        } else {
-                                /* 256K with 32K bufs */
-                                log->l_iclog_bufs = XLOG_MAX_ICLOGS;
-                        }
-                } else
-                        log->l_iclog_bufs = mp->m_logbufs;
-
-#if defined(DEBUG) || defined(XLOG_NOLOG)
-                /* We are reactivating a filesystem after it was inactive */
-                if (log->l_targ == xlog_target) {
-                        xlog_target = NULL;
-                        xlog_debug = 1;
+        if (mp->m_logbufs <= 0) {
+                if (xfs_physmem <= btoc(128*1024*1024)) {
+                        log->l_iclog_bufs = XLOG_MIN_ICLOGS;
+                } else if (xfs_physmem <= btoc(400*1024*1024)) {
+                        log->l_iclog_bufs = XLOG_MED_ICLOGS;
+                } else {        /* 256K with 32K bufs */
+                        log->l_iclog_bufs = XLOG_MAX_ICLOGS;
                 }
-#endif
+        } else {
+                log->l_iclog_bufs = mp->m_logbufs;
         }
 
         /*
          * Buffer size passed in from mount system call.
          */
-        if (mp->m_logbsize != -1) {
+        if (mp->m_logbsize > 0) {
                 size = log->l_iclog_size = mp->m_logbsize;
                 log->l_iclog_size_log = 0;
                 while (size != 1) {
@@ -1094,7 +988,7 @@ xlog_get_iclog_buffer_size(xfs_mount_t	*mp,
                         log->l_iclog_hsize = BBSIZE;
                         log->l_iclog_heads = 1;
                 }
-                return;
+                goto done;
         }
 
         /*
@@ -1121,7 +1015,7 @@ xlog_get_iclog_buffer_size(xfs_mount_t	*mp,
         if (mp->m_sb.sb_blocksize >= 16*1024) {
                 log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
                 log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
-                if (mp->m_logbufs == -1) {
+                if (mp->m_logbufs <= 0) {
                         switch (mp->m_sb.sb_blocksize) {
                             case 16*1024:                       /* 16 KB */
                                 log->l_iclog_bufs = 3;
@@ -1138,6 +1032,12 @@ xlog_get_iclog_buffer_size(xfs_mount_t	*mp,
                         }
                 }
         }
+
+done:   /* are we being asked to make the sizes selected above visible? */
+        if (mp->m_logbufs == 0)
+                mp->m_logbufs = log->l_iclog_bufs;
+        if (mp->m_logbsize == 0)
+                mp->m_logbsize = log->l_iclog_size;
 }       /* xlog_get_iclog_buffer_size */
 
 
@@ -3390,7 +3290,7 @@ xlog_ticket_get(xlog_t		*log,
  *
  ******************************************************************************
  */
-#if defined(DEBUG) && !defined(XLOG_NOLOG)
+#if defined(DEBUG)
 /*
  * Make sure that the destination ptr is within the valid data region of
  * one of the iclogs.  This uses backup pointers stored in a different
@@ -3554,7 +3454,7 @@ xlog_verify_iclog(xlog_t	 *log,
                 ptr += sizeof(xlog_op_header_t) + op_len;
         }
 }       /* xlog_verify_iclog */
-#endif /* DEBUG && !XLOG_NOLOG */
+#endif
 
 /*
  * Mark all iclogs IOERROR. LOG_LOCK is held by the caller.
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 758e4eb67c0c..8f285149681f 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -492,6 +492,8 @@ typedef struct log {
                                                  * alignment mask */
 } xlog_t;
 
+#define XLOG_FORCED_SHUTDOWN(log)       ((log)->l_flags & XLOG_IO_ERROR)
+
 #define XLOG_GRANT_SUB_SPACE(log,bytes,type)    \
         xlog_grant_sub_space(log,bytes,type)
 static inline void xlog_grant_sub_space(struct log *log, int bytes, int type)
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index de3abf868ee3..279e043d7323 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -176,12 +176,8 @@ xfs_trans_dup(
         XFS_LBC_INIT(&(ntp->t_busy));
 
         ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
-
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-        ASSERT(!xlog_debug || tp->t_ticket != NULL);
-#else
         ASSERT(tp->t_ticket != NULL);
-#endif
+
         ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE);
         ntp->t_ticket = tp->t_ticket;
         ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used;
@@ -663,9 +659,6 @@ _xfs_trans_commit(
         int                     sync;
 #define XFS_TRANS_LOGVEC_COUNT  16
         xfs_log_iovec_t         log_vector_fast[XFS_TRANS_LOGVEC_COUNT];
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-        static xfs_lsn_t        trans_lsn = 1;
-#endif
         void                    *commit_iclog;
         int                     shutdown;
 
@@ -716,11 +709,7 @@ shut_us_down:
                         *commit_lsn_p = commit_lsn;
                 return (shutdown);
         }
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-        ASSERT(!xlog_debug || tp->t_ticket != NULL);
-#else
         ASSERT(tp->t_ticket != NULL);
-#endif
 
         /*
          * If we need to update the superblock, then do it now.
@@ -737,14 +726,10 @@ shut_us_down:
          * by using a vector from the stack when it fits.
          */
         nvec = xfs_trans_count_vecs(tp);
-
         if (nvec == 0) {
                 xfs_force_shutdown(mp, XFS_LOG_IO_ERROR);
                 goto shut_us_down;
-        }
-
-
-        if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
+        } else if (nvec <= XFS_TRANS_LOGVEC_COUNT) {
                 log_vector = log_vector_fast;
         } else {
                 log_vector = (xfs_log_iovec_t *)kmem_alloc(nvec *
@@ -758,30 +743,14 @@ shut_us_down:
          */
         xfs_trans_fill_vecs(tp, log_vector);
 
-        /*
-         * Ignore errors here. xfs_log_done would do the right thing.
-         * We need to put the ticket, etc. away.
-         */
-        error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket,
-                             &(tp->t_lsn));
+        error = xfs_log_write(mp, log_vector, nvec, tp->t_ticket, &(tp->t_lsn));
 
-#if defined(XLOG_NOLOG) || defined(DEBUG)
-        if (xlog_debug) {
-                commit_lsn = xfs_log_done(mp, tp->t_ticket,
-                                          &commit_iclog, log_flags);
-        } else {
-                commit_lsn = 0;
-                tp->t_lsn = trans_lsn++;
-        }
-#else
         /*
-         * This is the regular case.  At this point (after the call finishes),
-         * the transaction is committed incore and could go out to disk at
-         * any time.  However, all the items associated with the transaction
-         * are still locked and pinned in memory.
+         * The transaction is committed incore here, and can go out to disk
+         * at any time after this call.  However, all the items associated
+         * with the transaction are still locked and pinned in memory.
          */
         commit_lsn = xfs_log_done(mp, tp->t_ticket, &commit_iclog, log_flags);
-#endif
 
         tp->t_commit_lsn = commit_lsn;
         if (nvec > XFS_TRANS_LOGVEC_COUNT) {
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index dd419e1d71ba..94f0858699b5 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -214,9 +214,7 @@ xfs_start_flags(
         }
 
         if (ap->logbufs != -1 &&
-#if defined(DEBUG) || defined(XLOG_NOLOG)
             ap->logbufs != 0 &&
-#endif
             (ap->logbufs < XLOG_MIN_ICLOGS ||
              ap->logbufs > XLOG_MAX_ICLOGS)) {
                 cmn_err(CE_WARN,
@@ -226,6 +224,7 @@ xfs_start_flags(
         }
         mp->m_logbufs = ap->logbufs;
         if (ap->logbufsize != -1 &&
+            ap->logbufsize !=  0 &&
             ap->logbufsize != 16 * 1024 &&
             ap->logbufsize != 32 * 1024 &&
             ap->logbufsize != 64 * 1024 &&
@@ -1910,13 +1909,14 @@ xfs_showargs(
                 seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize);
 
         if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
-                seq_printf(m, "," MNTOPT_ALLOCSIZE "=%d", 1<<mp->m_writeio_log);
+                seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk",
+                                (int)(1 << mp->m_writeio_log) >> 10);
 
         if (mp->m_logbufs > 0)
                 seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
 
         if (mp->m_logbsize > 0)
-                seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
+                seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
 
         if (mp->m_logname)
                 seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);