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[PATCH] ext3 and jbd cleanup: remove whitespace

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Remove whitespace from ext3 and jbd, before we clone ext4.

Signed-off-by: Mingming Cao<cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mingming Cao
2006-09-27 01:49:27 -07:00
committed by Linus Torvalds
parent e7ab8d6505
commit ae6ddcc5f2
17 changed files with 307 additions and 307 deletions
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128
fs/jbd/transaction.c
View File

@@ -1,6 +1,6 @@
/*
* linux/fs/transaction.c
*
*
* Written by Stephen C. Tweedie <sct@redhat.com>, 1998
*
* Copyright 1998 Red Hat corp --- All Rights Reserved
@@ -10,7 +10,7 @@
* option, any later version, incorporated herein by reference.
*
* Generic filesystem transaction handling code; part of the ext2fs
* journaling system.
* journaling system.
*
* This file manages transactions (compound commits managed by the
* journaling code) and handles (individual atomic operations by the
@@ -74,7 +74,7 @@ get_transaction(journal_t *journal, transaction_t *transaction)
* start_this_handle: Given a handle, deal with any locking or stalling
* needed to make sure that there is enough journal space for the handle
* to begin. Attach the handle to a transaction and set up the
* transaction's buffer credits.
* transaction's buffer credits.
*/
static int start_this_handle(journal_t *journal, handle_t *handle)
@@ -117,7 +117,7 @@ repeat_locked:
if (is_journal_aborted(journal) ||
(journal->j_errno != 0 && !(journal->j_flags & JFS_ACK_ERR))) {
spin_unlock(&journal->j_state_lock);
ret = -EROFS;
ret = -EROFS;
goto out;
}
@@ -182,7 +182,7 @@ repeat_locked:
goto repeat;
}
/*
/*
* The commit code assumes that it can get enough log space
* without forcing a checkpoint. This is *critical* for
* correctness: a checkpoint of a buffer which is also
@@ -191,7 +191,7 @@ repeat_locked:
*
* We must therefore ensure the necessary space in the journal
* *before* starting to dirty potentially checkpointed buffers
* in the new transaction.
* in the new transaction.
*
* The worst part is, any transaction currently committing can
* reduce the free space arbitrarily. Be careful to account for
@@ -246,13 +246,13 @@ static handle_t *new_handle(int nblocks)
}
/**
* handle_t *journal_start() - Obtain a new handle.
* handle_t *journal_start() - Obtain a new handle.
* @journal: Journal to start transaction on.
* @nblocks: number of block buffer we might modify
*
* We make sure that the transaction can guarantee at least nblocks of
* modified buffers in the log. We block until the log can guarantee
* that much space.
* that much space.
*
* This function is visible to journal users (like ext3fs), so is not
* called with the journal already locked.
@@ -292,11 +292,11 @@ handle_t *journal_start(journal_t *journal, int nblocks)
* int journal_extend() - extend buffer credits.
* @handle: handle to 'extend'
* @nblocks: nr blocks to try to extend by.
*
*
* Some transactions, such as large extends and truncates, can be done
* atomically all at once or in several stages. The operation requests
* a credit for a number of buffer modications in advance, but can
* extend its credit if it needs more.
* extend its credit if it needs more.
*
* journal_extend tries to give the running handle more buffer credits.
* It does not guarantee that allocation - this is a best-effort only.
@@ -363,7 +363,7 @@ out:
* int journal_restart() - restart a handle .
* @handle: handle to restart
* @nblocks: nr credits requested
*
*
* Restart a handle for a multi-transaction filesystem
* operation.
*
@@ -462,7 +462,7 @@ void journal_lock_updates(journal_t *journal)
/**
* void journal_unlock_updates (journal_t* journal) - release barrier
* @journal: Journal to release the barrier on.
*
*
* Release a transaction barrier obtained with journal_lock_updates().
*
* Should be called without the journal lock held.
@@ -547,8 +547,8 @@ repeat:
jbd_lock_bh_state(bh);
/* We now hold the buffer lock so it is safe to query the buffer
* state. Is the buffer dirty?
*
* state. Is the buffer dirty?
*
* If so, there are two possibilities. The buffer may be
* non-journaled, and undergoing a quite legitimate writeback.
* Otherwise, it is journaled, and we don't expect dirty buffers
@@ -566,7 +566,7 @@ repeat:
*/
if (jh->b_transaction) {
J_ASSERT_JH(jh,
jh->b_transaction == transaction ||
jh->b_transaction == transaction ||
jh->b_transaction ==
journal->j_committing_transaction);
if (jh->b_next_transaction)
@@ -653,7 +653,7 @@ repeat:
* buffer had better remain locked during the kmalloc,
* but that should be true --- we hold the journal lock
* still and the buffer is already on the BUF_JOURNAL
* list so won't be flushed.
* list so won't be flushed.
*
* Subtle point, though: if this is a get_undo_access,
* then we will be relying on the frozen_data to contain
@@ -765,8 +765,8 @@ int journal_get_write_access(handle_t *handle, struct buffer_head *bh)
* manually rather than reading off disk), then we need to keep the
* buffer_head locked until it has been completely filled with new
* data. In this case, we should be able to make the assertion that
* the bh is not already part of an existing transaction.
*
* the bh is not already part of an existing transaction.
*
* The buffer should already be locked by the caller by this point.
* There is no lock ranking violation: it was a newly created,
* unlocked buffer beforehand. */
@@ -778,7 +778,7 @@ int journal_get_write_access(handle_t *handle, struct buffer_head *bh)
*
* Call this if you create a new bh.
*/
int journal_get_create_access(handle_t *handle, struct buffer_head *bh)
int journal_get_create_access(handle_t *handle, struct buffer_head *bh)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal = transaction->t_journal;
@@ -847,13 +847,13 @@ out:
* do not reuse freed space until the deallocation has been committed,
* since if we overwrote that space we would make the delete
* un-rewindable in case of a crash.
*
*
* To deal with that, journal_get_undo_access requests write access to a
* buffer for parts of non-rewindable operations such as delete
* operations on the bitmaps. The journaling code must keep a copy of
* the buffer's contents prior to the undo_access call until such time
* as we know that the buffer has definitely been committed to disk.
*
*
* We never need to know which transaction the committed data is part
* of, buffers touched here are guaranteed to be dirtied later and so
* will be committed to a new transaction in due course, at which point
@@ -911,13 +911,13 @@ out:
return err;
}
/**
/**
* int journal_dirty_data() - mark a buffer as containing dirty data which
* needs to be flushed before we can commit the
* current transaction.
* current transaction.
* @handle: transaction
* @bh: bufferhead to mark
*
*
* The buffer is placed on the transaction's data list and is marked as
* belonging to the transaction.
*
@@ -946,15 +946,15 @@ int journal_dirty_data(handle_t *handle, struct buffer_head *bh)
/*
* What if the buffer is already part of a running transaction?
*
*
* There are two cases:
* 1) It is part of the current running transaction. Refile it,
* just in case we have allocated it as metadata, deallocated
* it, then reallocated it as data.
* it, then reallocated it as data.
* 2) It is part of the previous, still-committing transaction.
* If all we want to do is to guarantee that the buffer will be
* written to disk before this new transaction commits, then
* being sure that the *previous* transaction has this same
* being sure that the *previous* transaction has this same
* property is sufficient for us! Just leave it on its old
* transaction.
*
@@ -1076,18 +1076,18 @@ no_journal:
return 0;
}
/**
/**
* int journal_dirty_metadata() - mark a buffer as containing dirty metadata
* @handle: transaction to add buffer to.
* @bh: buffer to mark
*
* @bh: buffer to mark
*
* mark dirty metadata which needs to be journaled as part of the current
* transaction.
*
* The buffer is placed on the transaction's metadata list and is marked
* as belonging to the transaction.
* as belonging to the transaction.
*
* Returns error number or 0 on success.
* Returns error number or 0 on success.
*
* Special care needs to be taken if the buffer already belongs to the
* current committing transaction (in which case we should have frozen
@@ -1135,11 +1135,11 @@ int journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
set_buffer_jbddirty(bh);
/*
/*
* Metadata already on the current transaction list doesn't
* need to be filed. Metadata on another transaction's list must
* be committing, and will be refiled once the commit completes:
* leave it alone for now.
* leave it alone for now.
*/
if (jh->b_transaction != transaction) {
JBUFFER_TRACE(jh, "already on other transaction");
@@ -1165,7 +1165,7 @@ out:
return 0;
}
/*
/*
* journal_release_buffer: undo a get_write_access without any buffer
* updates, if the update decided in the end that it didn't need access.
*
@@ -1176,20 +1176,20 @@ journal_release_buffer(handle_t *handle, struct buffer_head *bh)
BUFFER_TRACE(bh, "entry");
}
/**
/**
* void journal_forget() - bforget() for potentially-journaled buffers.
* @handle: transaction handle
* @bh: bh to 'forget'
*
* We can only do the bforget if there are no commits pending against the
* buffer. If the buffer is dirty in the current running transaction we
* can safely unlink it.
* can safely unlink it.
*
* bh may not be a journalled buffer at all - it may be a non-JBD
* buffer which came off the hashtable. Check for this.
*
* Decrements bh->b_count by one.
*
*
* Allow this call even if the handle has aborted --- it may be part of
* the caller's cleanup after an abort.
*/
@@ -1237,7 +1237,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
drop_reserve = 1;
/*
/*
* We are no longer going to journal this buffer.
* However, the commit of this transaction is still
* important to the buffer: the delete that we are now
@@ -1246,7 +1246,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
*
* So, if we have a checkpoint on the buffer, we should
* now refile the buffer on our BJ_Forget list so that
* we know to remove the checkpoint after we commit.
* we know to remove the checkpoint after we commit.
*/
if (jh->b_cp_transaction) {
@@ -1264,7 +1264,7 @@ int journal_forget (handle_t *handle, struct buffer_head *bh)
}
}
} else if (jh->b_transaction) {
J_ASSERT_JH(jh, (jh->b_transaction ==
J_ASSERT_JH(jh, (jh->b_transaction ==
journal->j_committing_transaction));
/* However, if the buffer is still owned by a prior
* (committing) transaction, we can't drop it yet... */
@@ -1294,7 +1294,7 @@ drop:
/**
* int journal_stop() - complete a transaction
* @handle: tranaction to complete.
*
*
* All done for a particular handle.
*
* There is not much action needed here. We just return any remaining
@@ -1303,7 +1303,7 @@ drop:
* filesystem is marked for synchronous update.
*
* journal_stop itself will not usually return an error, but it may
* do so in unusual circumstances. In particular, expect it to
* do so in unusual circumstances. In particular, expect it to
* return -EIO if a journal_abort has been executed since the
* transaction began.
*/
@@ -1388,7 +1388,7 @@ int journal_stop(handle_t *handle)
/*
* Special case: JFS_SYNC synchronous updates require us
* to wait for the commit to complete.
* to wait for the commit to complete.
*/
if (handle->h_sync && !(current->flags & PF_MEMALLOC))
err = log_wait_commit(journal, tid);
@@ -1439,7 +1439,7 @@ int journal_force_commit(journal_t *journal)
* jbd_lock_bh_state(jh2bh(jh)) is held.
*/
static inline void
static inline void
__blist_add_buffer(struct journal_head **list, struct journal_head *jh)
{
if (!*list) {
@@ -1454,7 +1454,7 @@ __blist_add_buffer(struct journal_head **list, struct journal_head *jh)
}
}
/*
/*
* Remove a buffer from a transaction list, given the transaction's list
* head pointer.
*
@@ -1475,7 +1475,7 @@ __blist_del_buffer(struct journal_head **list, struct journal_head *jh)
jh->b_tnext->b_tprev = jh->b_tprev;
}
/*
/*
* Remove a buffer from the appropriate transaction list.
*
* Note that this function can *change* the value of
@@ -1595,17 +1595,17 @@ out:
}
/**
/**
* int journal_try_to_free_buffers() - try to free page buffers.
* @journal: journal for operation
* @page: to try and free
* @unused_gfp_mask: unused
*
*
*
* For all the buffers on this page,
* if they are fully written out ordered data, move them onto BUF_CLEAN
* so try_to_free_buffers() can reap them.
*
*
* This function returns non-zero if we wish try_to_free_buffers()
* to be called. We do this if the page is releasable by try_to_free_buffers().
* We also do it if the page has locked or dirty buffers and the caller wants
@@ -1629,7 +1629,7 @@ out:
* cannot happen because we never reallocate freed data as metadata
* while the data is part of a transaction. Yes?
*/
int journal_try_to_free_buffers(journal_t *journal,
int journal_try_to_free_buffers(journal_t *journal,
struct page *page, gfp_t unused_gfp_mask)
{
struct buffer_head *head;
@@ -1697,7 +1697,7 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
}
/*
* journal_invalidatepage
* journal_invalidatepage
*
* This code is tricky. It has a number of cases to deal with.
*
@@ -1705,15 +1705,15 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
*
* i_size must be updated on disk before we start calling invalidatepage on the
* data.
*
*
* This is done in ext3 by defining an ext3_setattr method which
* updates i_size before truncate gets going. By maintaining this
* invariant, we can be sure that it is safe to throw away any buffers
* attached to the current transaction: once the transaction commits,
* we know that the data will not be needed.
*
*
* Note however that we can *not* throw away data belonging to the
* previous, committing transaction!
* previous, committing transaction!
*
* Any disk blocks which *are* part of the previous, committing
* transaction (and which therefore cannot be discarded immediately) are
@@ -1732,7 +1732,7 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
* don't make guarantees about the order in which data hits disk --- in
* particular we don't guarantee that new dirty data is flushed before
* transaction commit --- so it is always safe just to discard data
* immediately in that mode. --sct
* immediately in that mode. --sct
*/
/*
@@ -1876,9 +1876,9 @@ zap_buffer_unlocked:
return may_free;
}
/**
/**
* void journal_invalidatepage()
* @journal: journal to use for flush...
* @journal: journal to use for flush...
* @page: page to flush
* @offset: length of page to invalidate.
*
@@ -1886,7 +1886,7 @@ zap_buffer_unlocked:
*
*/
void journal_invalidatepage(journal_t *journal,
struct page *page,
struct page *page,
unsigned long offset)
{
struct buffer_head *head, *bh, *next;
@@ -1924,8 +1924,8 @@ void journal_invalidatepage(journal_t *journal,
}
}
/*
* File a buffer on the given transaction list.
/*
* File a buffer on the given transaction list.
*/
void __journal_file_buffer(struct journal_head *jh,
transaction_t *transaction, int jlist)
@@ -1948,7 +1948,7 @@ void __journal_file_buffer(struct journal_head *jh,
* with __jbd_unexpected_dirty_buffer()'s handling of dirty
* state. */
if (jlist == BJ_Metadata || jlist == BJ_Reserved ||
if (jlist == BJ_Metadata || jlist == BJ_Reserved ||
jlist == BJ_Shadow || jlist == BJ_Forget) {
if (test_clear_buffer_dirty(bh) ||
test_clear_buffer_jbddirty(bh))
@@ -2008,7 +2008,7 @@ void journal_file_buffer(struct journal_head *jh,
jbd_unlock_bh_state(jh2bh(jh));
}
/*
/*
* Remove a buffer from its current buffer list in preparation for
* dropping it from its current transaction entirely. If the buffer has
* already started to be used by a subsequent transaction, refile the
@@ -2060,7 +2060,7 @@ void __journal_refile_buffer(struct journal_head *jh)
* to the caller to remove the journal_head if necessary. For the
* unlocked journal_refile_buffer call, the caller isn't going to be
* doing anything else to the buffer so we need to do the cleanup
* ourselves to avoid a jh leak.
* ourselves to avoid a jh leak.
*
* *** The journal_head may be freed by this call! ***
*/