SPLDECL(s);
int needed = 0, gen;
xlog_t *log = mp->m_log;
- bhv_vfs_t *vfsp = XFS_MTOVFS(mp);
- if (vfs_test_for_freeze(vfsp) || XFS_FORCED_SHUTDOWN(mp) ||
- (vfsp->vfs_flag & VFS_RDONLY))
+ if (!xfs_fs_writable(mp))
return 0;
s = LOG_LOCK(log);
*/
l = iclog->ic_log;
+ /*
+ * If the ordered flag has been removed by a lower
+ * layer, it means the underlyin device no longer supports
+ * barrier I/O. Warn loudly and turn off barriers.
+ */
+ if ((l->l_mp->m_flags & XFS_MOUNT_BARRIER) && !XFS_BUF_ORDERED(bp)) {
+ l->l_mp->m_flags &= ~XFS_MOUNT_BARRIER;
+ xfs_fs_cmn_err(CE_WARN, l->l_mp,
+ "xlog_iodone: Barriers are no longer supported"
+ " by device. Disabling barriers\n");
+ xfs_buftrace("XLOG_IODONE BARRIERS OFF", bp);
+ }
+
/*
* Race to shutdown the filesystem if we see an error.
*/
} else if (iclog->ic_state & XLOG_STATE_IOERROR) {
aborted = XFS_LI_ABORTED;
}
+
+ /* log I/O is always issued ASYNC */
+ ASSERT(XFS_BUF_ISASYNC(bp));
xlog_state_done_syncing(iclog, aborted);
- if (!(XFS_BUF_ISASYNC(bp))) {
- /*
- * Corresponding psema() will be done in bwrite(). If we don't
- * vsema() here, panic.
- */
- XFS_BUF_V_IODONESEMA(bp);
- }
+ /*
+ * do not reference the buffer (bp) here as we could race
+ * with it being freed after writing the unmount record to the
+ * log.
+ */
+
} /* xlog_iodone */
/*
/*
* Return size of each in-core log record buffer.
*
- * Low memory machines only get 2 16KB buffers. We don't want to waste
- * memory here. However, all other machines get at least 2 32KB buffers.
- * The number is hard coded because we don't care about the minimum
- * memory size, just 32MB systems.
+ * All machines get 8 x 32KB buffers by default, unless tuned otherwise.
*
* If the filesystem blocksize is too large, we may need to choose a
* larger size since the directory code currently logs entire blocks.
int size;
int xhdrs;
- 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;
- }
- } else {
+ if (mp->m_logbufs <= 0)
+ log->l_iclog_bufs = XLOG_MAX_ICLOGS;
+ else
log->l_iclog_bufs = mp->m_logbufs;
- }
/*
* Buffer size passed in from mount system call.
goto done;
}
- /*
- * Special case machines that have less than 32MB of memory.
- * All machines with more memory use 32KB buffers.
- */
- if (xfs_physmem <= btoc(32*1024*1024)) {
- /* Don't change; min configuration */
- log->l_iclog_size = XLOG_RECORD_BSIZE; /* 16k */
- log->l_iclog_size_log = XLOG_RECORD_BSHIFT;
- } else {
- log->l_iclog_size = XLOG_BIG_RECORD_BSIZE; /* 32k */
- log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
- }
+ /* All machines use 32KB buffers by default. */
+ log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
+ log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
/* the default log size is 16k or 32k which is one header sector */
log->l_iclog_hsize = BBSIZE;
} else {
iclog->ic_bwritecnt = 1;
}
- XFS_BUF_SET_PTR(bp, (xfs_caddr_t) &(iclog->ic_header), count);
+ XFS_BUF_SET_COUNT(bp, count);
XFS_BUF_SET_FSPRIVATE(bp, iclog); /* save for later */
XFS_BUF_ZEROFLAGS(bp);
XFS_BUF_BUSY(bp);
}
cb = iclog->ic_callback;
- while (cb != 0) {
+ while (cb) {
iclog->ic_callback_tail = &(iclog->ic_callback);
iclog->ic_callback = NULL;
LOG_UNLOCK(log, s);
/* perform callbacks in the order given */
- for (; cb != 0; cb = cb_next) {
+ for (; cb; cb = cb_next) {
cb_next = cb->cb_next;
cb->cb_func(cb->cb_arg, aborted);
}
loopdidcallbacks++;
funcdidcallbacks++;
- ASSERT(iclog->ic_callback == 0);
+ ASSERT(iclog->ic_callback == NULL);
if (!(iclog->ic_state & XLOG_STATE_IOERROR))
iclog->ic_state = XLOG_STATE_DIRTY;
#else
/* When we debug, it is easier if tickets are cycled */
ticket->t_next = NULL;
- if (log->l_tail != 0) {
+ if (log->l_tail) {
log->l_tail->t_next = ticket;
} else {
- ASSERT(log->l_freelist == 0);
+ ASSERT(log->l_freelist == NULL);
log->l_freelist = ticket;
}
log->l_tail = ticket;
s = LOG_LOCK(log);
icptr = log->l_iclog;
for (i=0; i < log->l_iclog_bufs; i++) {
- if (icptr == 0)
+ if (icptr == NULL)
xlog_panic("xlog_verify_iclog: invalid ptr");
icptr = icptr->ic_next;
}