Pull sysfs into test branch

[linux-2.6] / fs / jbd / transaction.c

diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index bf7fd71178175f37aa361712feb26dc05439313c..cceaf57e37781304df0b553ca2f8e9957fd65ecb 100644 (file)
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -27,6 +27,8 @@
 #include <linux/mm.h>
 #include <linux/highmem.h>
 
+static void __journal_temp_unlink_buffer(struct journal_head *jh);
+
 /*
  * get_transaction: obtain a new transaction_t object.
  *
@@ -53,7 +55,7 @@ get_transaction(journal_t *journal, transaction_t *transaction)
        spin_lock_init(&transaction->t_handle_lock);
 
        /* Set up the commit timer for the new transaction. */
-       journal->j_commit_timer.expires = transaction->t_expires;
+       journal->j_commit_timer.expires = round_jiffies(transaction->t_expires);
        add_timer(&journal->j_commit_timer);
 
        J_ASSERT(journal->j_running_transaction == NULL);
@@ -580,7 +582,7 @@ repeat:
                 */
                JBUFFER_TRACE(jh, "Unexpected dirty buffer");
                jbd_unexpected_dirty_buffer(jh);
-       }
+       }
 
        unlock_buffer(bh);
 
@@ -967,6 +969,13 @@ int journal_dirty_data(handle_t *handle, struct buffer_head *bh)
         */
        jbd_lock_bh_state(bh);
        spin_lock(&journal->j_list_lock);
+
+       /* Now that we have bh_state locked, are we really still mapped? */
+       if (!buffer_mapped(bh)) {
+               JBUFFER_TRACE(jh, "unmapped buffer, bailing out");
+               goto no_journal;
+       }
+
        if (jh->b_transaction) {
                JBUFFER_TRACE(jh, "has transaction");
                if (jh->b_transaction != handle->h_transaction) {
@@ -1028,6 +1037,11 @@ int journal_dirty_data(handle_t *handle, struct buffer_head *bh)
                                sync_dirty_buffer(bh);
                                jbd_lock_bh_state(bh);
                                spin_lock(&journal->j_list_lock);
+                               /* Since we dropped the lock... */
+                               if (!buffer_mapped(bh)) {
+                                       JBUFFER_TRACE(jh, "buffer got unmapped");
+                                       goto no_journal;
+                               }
                                /* The buffer may become locked again at any
                                   time if it is redirtied */
                        }
@@ -1314,13 +1328,14 @@ int journal_stop(handle_t *handle)
        int old_handle_count, err;
        pid_t pid;
 
-       J_ASSERT(transaction->t_updates > 0);
        J_ASSERT(journal_current_handle() == handle);
 
        if (is_handle_aborted(handle))
                err = -EIO;
-       else
+       else {
+               J_ASSERT(transaction->t_updates > 0);
                err = 0;
+       }
 
        if (--handle->h_ref > 0) {
                jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,
@@ -1373,7 +1388,7 @@ int journal_stop(handle_t *handle)
        if (handle->h_sync ||
                        transaction->t_outstanding_credits >
                                journal->j_max_transaction_buffers ||
-                       time_after_eq(jiffies, transaction->t_expires)) {
+                       time_after_eq(jiffies, transaction->t_expires)) {
                /* Do this even for aborted journals: an abort still
                 * completes the commit thread, it just doesn't write
                 * anything to disk. */
@@ -1486,7 +1501,7 @@ __blist_del_buffer(struct journal_head **list, struct journal_head *jh)
  *
  * Called under j_list_lock.  The journal may not be locked.
  */
-void __journal_temp_unlink_buffer(struct journal_head *jh)
+static void __journal_temp_unlink_buffer(struct journal_head *jh)
 {
        struct journal_head **list = NULL;
        transaction_t *transaction;
@@ -1823,6 +1838,7 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
                        }
                }
        } else if (transaction == journal->j_committing_transaction) {
+               JBUFFER_TRACE(jh, "on committing transaction");
                if (jh->b_jlist == BJ_Locked) {
                        /*
                         * The buffer is on the committing transaction's locked
@@ -1837,7 +1853,6 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
                 * can remove it's next_transaction pointer from the
                 * running transaction if that is set, but nothing
                 * else. */
-               JBUFFER_TRACE(jh, "on committing transaction");
                set_buffer_freed(bh);
                if (jh->b_next_transaction) {
                        J_ASSERT(jh->b_next_transaction ==
@@ -1857,6 +1872,7 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh)
                 * i_size already for this truncate so recovery will not
                 * expose the disk blocks we are discarding here.) */
                J_ASSERT_JH(jh, transaction == journal->j_running_transaction);
+               JBUFFER_TRACE(jh, "on running transaction");
                may_free = __dispose_buffer(jh, transaction);
        }
 
@@ -1908,7 +1924,7 @@ void journal_invalidatepage(journal_t *journal,
                next = bh->b_this_page;
 
                if (offset <= curr_off) {
-                       /* This block is wholly outside the truncation point */
+                       /* This block is wholly outside the truncation point */
                        lock_buffer(bh);
                        may_free &= journal_unmap_buffer(journal, bh);
                        unlock_buffer(bh);