/*
-** Write ahead logging implementation copyright Chris Mason 2000
-**
-** The background commits make this code very interrelated, and
-** overly complex. I need to rethink things a bit....The major players:
-**
-** journal_begin -- call with the number of blocks you expect to log.
-** If the current transaction is too
-** old, it will block until the current transaction is
-** finished, and then start a new one.
-** Usually, your transaction will get joined in with
-** previous ones for speed.
-**
-** journal_join -- same as journal_begin, but won't block on the current
-** transaction regardless of age. Don't ever call
-** this. Ever. There are only two places it should be
-** called from, and they are both inside this file.
-**
-** journal_mark_dirty -- adds blocks into this transaction. clears any flags
-** that might make them get sent to disk
-** and then marks them BH_JDirty. Puts the buffer head
-** into the current transaction hash.
-**
-** journal_end -- if the current transaction is batchable, it does nothing
-** otherwise, it could do an async/synchronous commit, or
-** a full flush of all log and real blocks in the
-** transaction.
-**
-** flush_old_commits -- if the current transaction is too old, it is ended and
-** commit blocks are sent to disk. Forces commit blocks
-** to disk for all backgrounded commits that have been
-** around too long.
-** -- Note, if you call this as an immediate flush from
-** from within kupdate, it will ignore the immediate flag
-*/
+ * Write ahead logging implementation copyright Chris Mason 2000
+ *
+ * The background commits make this code very interrelated, and
+ * overly complex. I need to rethink things a bit....The major players:
+ *
+ * journal_begin -- call with the number of blocks you expect to log.
+ * If the current transaction is too
+ * old, it will block until the current transaction is
+ * finished, and then start a new one.
+ * Usually, your transaction will get joined in with
+ * previous ones for speed.
+ *
+ * journal_join -- same as journal_begin, but won't block on the current
+ * transaction regardless of age. Don't ever call
+ * this. Ever. There are only two places it should be
+ * called from, and they are both inside this file.
+ *
+ * journal_mark_dirty -- adds blocks into this transaction. clears any flags
+ * that might make them get sent to disk
+ * and then marks them BH_JDirty. Puts the buffer head
+ * into the current transaction hash.
+ *
+ * journal_end -- if the current transaction is batchable, it does nothing
+ * otherwise, it could do an async/synchronous commit, or
+ * a full flush of all log and real blocks in the
+ * transaction.
+ *
+ * flush_old_commits -- if the current transaction is too old, it is ended and
+ * commit blocks are sent to disk. Forces commit blocks
+ * to disk for all backgrounded commits that have been
+ * around too long.
+ * -- Note, if you call this as an immediate flush from
+ * from within kupdate, it will ignore the immediate flag
+ */
#include <linux/time.h>
#include <linux/semaphore.h>
#define JOURNAL_WORK_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
j_working_list))
-#define JOURNAL_TRANS_HALF 1018 /* must be correct to keep the desc and commit
- structs at 4k */
+/* must be correct to keep the desc and commit structs at 4k */
+#define JOURNAL_TRANS_HALF 1018
#define BUFNR 64 /*read ahead */
/* cnode stat bits. Move these into reiserfs_fs.h */
-#define BLOCK_FREED 2 /* this block was freed, and can't be written. */
-#define BLOCK_FREED_HOLDER 3 /* this block was freed during this transaction, and can't be written */
+/* this block was freed, and can't be written. */
+#define BLOCK_FREED 2
+/* this block was freed during this transaction, and can't be written */
+#define BLOCK_FREED_HOLDER 3
-#define BLOCK_NEEDS_FLUSH 4 /* used in flush_journal_list */
+/* used in flush_journal_list */
+#define BLOCK_NEEDS_FLUSH 4
#define BLOCK_DIRTIED 5
/* journal list state bits */
#define COMMIT_NOW 2 /* end and commit this transaction */
#define WAIT 4 /* wait for the log blocks to hit the disk */
-static int do_journal_end(struct reiserfs_transaction_handle *,
- struct super_block *, unsigned long nblocks,
- int flags);
+static int do_journal_end(struct reiserfs_transaction_handle *, int flags);
static int flush_journal_list(struct super_block *s,
struct reiserfs_journal_list *jl, int flushall);
static int flush_commit_list(struct super_block *s,
struct reiserfs_journal_list *jl, int flushall);
static int can_dirty(struct reiserfs_journal_cnode *cn);
static int journal_join(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks);
+ struct super_block *sb);
static void release_journal_dev(struct super_block *super,
struct reiserfs_journal *journal);
static int dirty_one_transaction(struct super_block *s,
/* values for join in do_journal_begin_r */
enum {
JBEGIN_REG = 0, /* regular journal begin */
- JBEGIN_JOIN = 1, /* join the running transaction if at all possible */
- JBEGIN_ABORT = 2, /* called from cleanup code, ignores aborted flag */
+ /* join the running transaction if at all possible */
+ JBEGIN_JOIN = 1,
+ /* called from cleanup code, ignores aborted flag */
+ JBEGIN_ABORT = 2,
};
static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
}
/*
-** clears BH_Dirty and sticks the buffer on the clean list. Called because I can't allow refile_buffer to
-** make schedule happen after I've freed a block. Look at remove_from_transaction and journal_mark_freed for
-** more details.
-*/
+ * clears BH_Dirty and sticks the buffer on the clean list. Called because
+ * I can't allow refile_buffer to make schedule happen after I've freed a
+ * block. Look at remove_from_transaction and journal_mark_freed for
+ * more details.
+ */
static int reiserfs_clean_and_file_buffer(struct buffer_head *bh)
{
if (bh) {
struct list_head *entry = journal->j_bitmap_nodes.next;
journal->j_used_bitmap_nodes++;
- repeat:
+repeat:
if (entry != &journal->j_bitmap_nodes) {
bn = list_entry(entry, struct reiserfs_bitmap_node, list);
list_add(&bn->list, &journal->j_bitmap_nodes);
journal->j_free_bitmap_nodes++;
} else {
- break; /* this is ok, we'll try again when more are needed */
+ /* this is ok, we'll try again when more are needed */
+ break;
}
}
}
}
/*
-** only call this on FS unmount.
-*/
+ * only call this on FS unmount.
+ */
static int free_list_bitmaps(struct super_block *sb,
struct reiserfs_list_bitmap *jb_array)
{
}
/*
-** get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
-** jb_array is the array to be filled in.
-*/
+ * get memory for JOURNAL_NUM_BITMAPS worth of bitmaps.
+ * jb_array is the array to be filled in.
+ */
int reiserfs_allocate_list_bitmaps(struct super_block *sb,
struct reiserfs_list_bitmap *jb_array,
unsigned int bmap_nr)
}
/*
-** find an available list bitmap. If you can't find one, flush a commit list
-** and try again
-*/
+ * find an available list bitmap. If you can't find one, flush a commit list
+ * and try again
+ */
static struct reiserfs_list_bitmap *get_list_bitmap(struct super_block *sb,
struct reiserfs_journal_list
*jl)
break;
}
}
- if (jb->journal_list) { /* double check to make sure if flushed correctly */
+ /* double check to make sure if flushed correctly */
+ if (jb->journal_list)
return NULL;
- }
jb->journal_list = jl;
return jb;
}
/*
-** allocates a new chunk of X nodes, and links them all together as a list.
-** Uses the cnode->next and cnode->prev pointers
-** returns NULL on failure
-*/
+ * allocates a new chunk of X nodes, and links them all together as a list.
+ * Uses the cnode->next and cnode->prev pointers
+ * returns NULL on failure
+ */
static struct reiserfs_journal_cnode *allocate_cnodes(int num_cnodes)
{
struct reiserfs_journal_cnode *head;
return head;
}
-/*
-** pulls a cnode off the free list, or returns NULL on failure
-*/
+/* pulls a cnode off the free list, or returns NULL on failure */
static struct reiserfs_journal_cnode *get_cnode(struct super_block *sb)
{
struct reiserfs_journal_cnode *cn;
}
/*
-** returns a cnode to the free list
-*/
+ * returns a cnode to the free list
+ */
static void free_cnode(struct super_block *sb,
struct reiserfs_journal_cnode *cn)
{
clear_buffer_journal_restore_dirty(bh);
}
-/* return a cnode with same dev, block number and size in table, or null if not found */
+/*
+ * return a cnode with same dev, block number and size in table,
+ * or null if not found
+ */
static inline struct reiserfs_journal_cnode *get_journal_hash_dev(struct
super_block
*sb,
}
/*
-** this actually means 'can this block be reallocated yet?'. If you set search_all, a block can only be allocated
-** if it is not in the current transaction, was not freed by the current transaction, and has no chance of ever
-** being overwritten by a replay after crashing.
-**
-** If you don't set search_all, a block can only be allocated if it is not in the current transaction. Since deleting
-** a block removes it from the current transaction, this case should never happen. If you don't set search_all, make
-** sure you never write the block without logging it.
-**
-** next_zero_bit is a suggestion about the next block to try for find_forward.
-** when bl is rejected because it is set in a journal list bitmap, we search
-** for the next zero bit in the bitmap that rejected bl. Then, we return that
-** through next_zero_bit for find_forward to try.
-**
-** Just because we return something in next_zero_bit does not mean we won't
-** reject it on the next call to reiserfs_in_journal
-**
-*/
+ * this actually means 'can this block be reallocated yet?'. If you set
+ * search_all, a block can only be allocated if it is not in the current
+ * transaction, was not freed by the current transaction, and has no chance
+ * of ever being overwritten by a replay after crashing.
+ *
+ * If you don't set search_all, a block can only be allocated if it is not
+ * in the current transaction. Since deleting a block removes it from the
+ * current transaction, this case should never happen. If you don't set
+ * search_all, make sure you never write the block without logging it.
+ *
+ * next_zero_bit is a suggestion about the next block to try for find_forward.
+ * when bl is rejected because it is set in a journal list bitmap, we search
+ * for the next zero bit in the bitmap that rejected bl. Then, we return
+ * that through next_zero_bit for find_forward to try.
+ *
+ * Just because we return something in next_zero_bit does not mean we won't
+ * reject it on the next call to reiserfs_in_journal
+ */
int reiserfs_in_journal(struct super_block *sb,
unsigned int bmap_nr, int bit_nr, int search_all,
b_blocknr_t * next_zero_bit)
*next_zero_bit = 0; /* always start this at zero. */
PROC_INFO_INC(sb, journal.in_journal);
- /* If we aren't doing a search_all, this is a metablock, and it will be logged before use.
- ** if we crash before the transaction that freed it commits, this transaction won't
- ** have committed either, and the block will never be written
+ /*
+ * If we aren't doing a search_all, this is a metablock, and it
+ * will be logged before use. if we crash before the transaction
+ * that freed it commits, this transaction won't have committed
+ * either, and the block will never be written
*/
if (search_all) {
for (i = 0; i < JOURNAL_NUM_BITMAPS; i++) {
return 0;
}
-/* insert cn into table
-*/
+/* insert cn into table */
static inline void insert_journal_hash(struct reiserfs_journal_cnode **table,
struct reiserfs_journal_cnode *cn)
{
}
/*
-** this used to be much more involved, and I'm keeping it just in case things get ugly again.
-** it gets called by flush_commit_list, and cleans up any data stored about blocks freed during a
-** transaction.
-*/
+ * this used to be much more involved, and I'm keeping it just in case
+ * things get ugly again. it gets called by flush_commit_list, and
+ * cleans up any data stored about blocks freed during a transaction.
+ */
static void cleanup_freed_for_journal_list(struct super_block *sb,
struct reiserfs_journal_list *jl)
{
jh = bh->b_private;
list_del_init(&jh->list);
} else {
- no_jh:
+no_jh:
get_bh(bh);
jh = alloc_jh();
spin_lock(&j->j_dirty_buffers_lock);
- /* buffer must be locked for __add_jh, should be able to have
+ /*
+ * buffer must be locked for __add_jh, should be able to have
* two adds at the same time
*/
BUG_ON(bh->b_private);
spin_lock(lock);
goto loop_next;
}
- /* in theory, dirty non-uptodate buffers should never get here,
+ /*
+ * in theory, dirty non-uptodate buffers should never get here,
* but the upper layer io error paths still have a few quirks.
* Handle them here as gracefully as we can
*/
reiserfs_free_jh(bh);
unlock_buffer(bh);
}
- loop_next:
+loop_next:
put_bh(bh);
cond_resched_lock(lock);
}
if (!buffer_uptodate(bh)) {
ret = -EIO;
}
- /* ugly interaction with invalidatepage here.
- * reiserfs_invalidate_page will pin any buffer that has a valid
- * journal head from an older transaction. If someone else sets
- * our buffer dirty after we write it in the first loop, and
- * then someone truncates the page away, nobody will ever write
- * the buffer. We're safe if we write the page one last time
- * after freeing the journal header.
+ /*
+ * ugly interaction with invalidatepage here.
+ * reiserfs_invalidate_page will pin any buffer that has a
+ * valid journal head from an older transaction. If someone
+ * else sets our buffer dirty after we write it in the first
+ * loop, and then someone truncates the page away, nobody
+ * will ever write the buffer. We're safe if we write the
+ * page one last time after freeing the journal header.
*/
if (buffer_dirty(bh) && unlikely(bh->b_page->mapping == NULL)) {
spin_unlock(lock);
unsigned int other_trans_id;
unsigned int first_trans_id;
- find_first:
+find_first:
/*
* first we walk backwards to find the oldest uncommitted transation
*/
if (!journal_list_still_alive(s, trans_id))
return 1;
- /* the one we just flushed is gone, this means all
- * older lists are also gone, so first_jl is no longer
- * valid either. Go back to the beginning.
+ /*
+ * the one we just flushed is gone, this means
+ * all older lists are also gone, so first_jl
+ * is no longer valid either. Go back to the
+ * beginning.
*/
if (!journal_list_still_alive
(s, other_trans_id)) {
}
/*
-** if this journal list still has commit blocks unflushed, send them to disk.
-**
-** log areas must be flushed in order (transaction 2 can't commit before transaction 1)
-** Before the commit block can by written, every other log block must be safely on disk
-**
-*/
+ * if this journal list still has commit blocks unflushed, send them to disk.
+ *
+ * log areas must be flushed in order (transaction 2 can't commit before
+ * transaction 1) Before the commit block can by written, every other log
+ * block must be safely on disk
+ */
static int flush_commit_list(struct super_block *s,
struct reiserfs_journal_list *jl, int flushall)
{
return 0;
}
- /* before we can put our commit blocks on disk, we have to make sure everyone older than
- ** us is on disk too
+ /*
+ * before we can put our commit blocks on disk, we have to make
+ * sure everyone older than us is on disk too
*/
BUG_ON(jl->j_len <= 0);
BUG_ON(trans_id == journal->j_trans_id);
get_journal_list(jl);
if (flushall) {
if (flush_older_commits(s, jl) == 1) {
- /* list disappeared during flush_older_commits. return */
+ /*
+ * list disappeared during flush_older_commits.
+ * return
+ */
goto put_jl;
}
}
BUG_ON(jl->j_trans_id == 0);
/* this commit is done, exit */
- if (atomic_read(&(jl->j_commit_left)) <= 0) {
+ if (atomic_read(&jl->j_commit_left) <= 0) {
if (flushall) {
- atomic_set(&(jl->j_older_commits_done), 1);
+ atomic_set(&jl->j_older_commits_done, 1);
}
mutex_unlock(&jl->j_commit_mutex);
goto put_jl;
depth = reiserfs_write_unlock_nested(s);
__wait_on_buffer(tbh);
reiserfs_write_lock_nested(s, depth);
- // since we're using ll_rw_blk above, it might have skipped over
- // a locked buffer. Double check here
- //
+ /*
+ * since we're using ll_rw_blk above, it might have skipped
+ * over a locked buffer. Double check here
+ */
/* redundant, sync_dirty_buffer() checks */
if (buffer_dirty(tbh)) {
depth = reiserfs_write_unlock_nested(s);
#endif
retval = -EIO;
}
- put_bh(tbh); /* once for journal_find_get_block */
- put_bh(tbh); /* once due to original getblk in do_journal_end */
- atomic_dec(&(jl->j_commit_left));
+ /* once for journal_find_get_block */
+ put_bh(tbh);
+ /* once due to original getblk in do_journal_end */
+ put_bh(tbh);
+ atomic_dec(&jl->j_commit_left);
}
- BUG_ON(atomic_read(&(jl->j_commit_left)) != 1);
+ BUG_ON(atomic_read(&jl->j_commit_left) != 1);
- /* If there was a write error in the journal - we can't commit
+ /*
+ * If there was a write error in the journal - we can't commit
* this transaction - it will be invalid and, if successful,
* will just end up propagating the write error out to
- * the file system. */
+ * the file system.
+ */
if (likely(!retval && !reiserfs_is_journal_aborted (journal))) {
if (buffer_dirty(jl->j_commit_bh))
BUG();
reiserfs_write_lock_nested(s, depth);
}
- /* If there was a write error in the journal - we can't commit this
+ /*
+ * If there was a write error in the journal - we can't commit this
* transaction - it will be invalid and, if successful, will just end
- * up propagating the write error out to the filesystem. */
+ * up propagating the write error out to the filesystem.
+ */
if (unlikely(!buffer_uptodate(jl->j_commit_bh))) {
#ifdef CONFIG_REISERFS_CHECK
reiserfs_warning(s, "journal-615", "buffer write failed");
}
journal->j_last_commit_id = jl->j_trans_id;
- /* now, every commit block is on the disk. It is safe to allow blocks freed during this transaction to be reallocated */
+ /*
+ * now, every commit block is on the disk. It is safe to allow
+ * blocks freed during this transaction to be reallocated
+ */
cleanup_freed_for_journal_list(s, jl);
retval = retval ? retval : journal->j_errno;
/* mark the metadata dirty */
if (!retval)
dirty_one_transaction(s, jl);
- atomic_dec(&(jl->j_commit_left));
+ atomic_dec(&jl->j_commit_left);
if (flushall) {
- atomic_set(&(jl->j_older_commits_done), 1);
+ atomic_set(&jl->j_older_commits_done, 1);
}
mutex_unlock(&jl->j_commit_mutex);
- put_jl:
+put_jl:
put_journal_list(s, jl);
if (retval)
}
/*
-** flush_journal_list frequently needs to find a newer transaction for a given block. This does that, or
-** returns NULL if it can't find anything
-*/
+ * flush_journal_list frequently needs to find a newer transaction for a
+ * given block. This does that, or returns NULL if it can't find anything
+ */
static struct reiserfs_journal_list *find_newer_jl_for_cn(struct
reiserfs_journal_cnode
*cn)
int);
/*
-** once all the real blocks have been flushed, it is safe to remove them from the
-** journal list for this transaction. Aside from freeing the cnode, this also allows the
-** block to be reallocated for data blocks if it had been deleted.
-*/
+ * once all the real blocks have been flushed, it is safe to remove them
+ * from the journal list for this transaction. Aside from freeing the
+ * cnode, this also allows the block to be reallocated for data blocks
+ * if it had been deleted.
+ */
static void remove_all_from_journal_list(struct super_block *sb,
struct reiserfs_journal_list *jl,
int debug)
struct reiserfs_journal_cnode *cn, *last;
cn = jl->j_realblock;
- /* which is better, to lock once around the whole loop, or
- ** to lock for each call to remove_journal_hash?
+ /*
+ * which is better, to lock once around the whole loop, or
+ * to lock for each call to remove_journal_hash?
*/
while (cn) {
if (cn->blocknr != 0) {
}
/*
-** if this timestamp is greater than the timestamp we wrote last to the header block, write it to the header block.
-** once this is done, I can safely say the log area for this transaction won't ever be replayed, and I can start
-** releasing blocks in this transaction for reuse as data blocks.
-** called by flush_journal_list, before it calls remove_all_from_journal_list
-**
-*/
+ * if this timestamp is greater than the timestamp we wrote last to the
+ * header block, write it to the header block. once this is done, I can
+ * safely say the log area for this transaction won't ever be replayed,
+ * and I can start releasing blocks in this transaction for reuse as data
+ * blocks. called by flush_journal_list, before it calls
+ * remove_all_from_journal_list
+ */
static int _update_journal_header_block(struct super_block *sb,
unsigned long offset,
unsigned int trans_id)
struct reiserfs_journal *journal = SB_JOURNAL(sb);
unsigned int trans_id = jl->j_trans_id;
- /* we know we are the only ones flushing things, no extra race
+ /*
+ * we know we are the only ones flushing things, no extra race
* protection is required.
*/
- restart:
+restart:
entry = journal->j_journal_list.next;
/* Did we wrap? */
if (entry == &journal->j_journal_list)
}
}
-/* flush a journal list, both commit and real blocks
-**
-** always set flushall to 1, unless you are calling from inside
-** flush_journal_list
-**
-** IMPORTANT. This can only be called while there are no journal writers,
-** and the journal is locked. That means it can only be called from
-** do_journal_end, or by journal_release
-*/
+/*
+ * flush a journal list, both commit and real blocks
+ *
+ * always set flushall to 1, unless you are calling from inside
+ * flush_journal_list
+ *
+ * IMPORTANT. This can only be called while there are no journal writers,
+ * and the journal is locked. That means it can only be called from
+ * do_journal_end, or by journal_release
+ */
static int flush_journal_list(struct super_block *s,
struct reiserfs_journal_list *jl, int flushall)
{
}
/* if all the work is already done, get out of here */
- if (atomic_read(&(jl->j_nonzerolen)) <= 0 &&
- atomic_read(&(jl->j_commit_left)) <= 0) {
+ if (atomic_read(&jl->j_nonzerolen) <= 0 &&
+ atomic_read(&jl->j_commit_left) <= 0) {
goto flush_older_and_return;
}
- /* start by putting the commit list on disk. This will also flush
- ** the commit lists of any olders transactions
+ /*
+ * start by putting the commit list on disk. This will also flush
+ * the commit lists of any olders transactions
*/
flush_commit_list(s, jl, 1);
BUG();
/* are we done now? */
- if (atomic_read(&(jl->j_nonzerolen)) <= 0 &&
- atomic_read(&(jl->j_commit_left)) <= 0) {
+ if (atomic_read(&jl->j_nonzerolen) <= 0 &&
+ atomic_read(&jl->j_commit_left) <= 0) {
goto flush_older_and_return;
}
- /* loop through each cnode, see if we need to write it,
- ** or wait on a more recent transaction, or just ignore it
+ /*
+ * loop through each cnode, see if we need to write it,
+ * or wait on a more recent transaction, or just ignore it
*/
- if (atomic_read(&(journal->j_wcount)) != 0) {
+ if (atomic_read(&journal->j_wcount) != 0) {
reiserfs_panic(s, "journal-844", "journal list is flushing, "
"wcount is not 0");
}
goto free_cnode;
}
- /* This transaction failed commit. Don't write out to the disk */
+ /*
+ * This transaction failed commit.
+ * Don't write out to the disk
+ */
if (!(jl->j_state & LIST_DIRTY))
goto free_cnode;
pjl = find_newer_jl_for_cn(cn);
- /* the order is important here. We check pjl to make sure we
- ** don't clear BH_JDirty_wait if we aren't the one writing this
- ** block to disk
+ /*
+ * the order is important here. We check pjl to make sure we
+ * don't clear BH_JDirty_wait if we aren't the one writing this
+ * block to disk
*/
if (!pjl && cn->bh) {
saved_bh = cn->bh;
- /* we do this to make sure nobody releases the buffer while
- ** we are working with it
+ /*
+ * we do this to make sure nobody releases the
+ * buffer while we are working with it
*/
get_bh(saved_bh);
was_jwait = 1;
was_dirty = 1;
} else if (can_dirty(cn)) {
- /* everything with !pjl && jwait should be writable */
+ /*
+ * everything with !pjl && jwait
+ * should be writable
+ */
BUG();
}
}
- /* if someone has this block in a newer transaction, just make
- ** sure they are committed, and don't try writing it to disk
+ /*
+ * if someone has this block in a newer transaction, just make
+ * sure they are committed, and don't try writing it to disk
*/
if (pjl) {
if (atomic_read(&pjl->j_commit_left))
goto free_cnode;
}
- /* bh == NULL when the block got to disk on its own, OR,
- ** the block got freed in a future transaction
+ /*
+ * bh == NULL when the block got to disk on its own, OR,
+ * the block got freed in a future transaction
*/
if (saved_bh == NULL) {
goto free_cnode;
}
- /* this should never happen. kupdate_one_transaction has this list
- ** locked while it works, so we should never see a buffer here that
- ** is not marked JDirty_wait
+ /*
+ * this should never happen. kupdate_one_transaction has
+ * this list locked while it works, so we should never see a
+ * buffer here that is not marked JDirty_wait
*/
if ((!was_jwait) && !buffer_locked(saved_bh)) {
reiserfs_warning(s, "journal-813",
was_jwait ? ' ' : '!');
}
if (was_dirty) {
- /* we inc again because saved_bh gets decremented at free_cnode */
+ /*
+ * we inc again because saved_bh gets decremented
+ * at free_cnode
+ */
get_bh(saved_bh);
set_bit(BLOCK_NEEDS_FLUSH, &cn->state);
lock_buffer(saved_bh);
(unsigned long long)saved_bh->
b_blocknr, __func__);
}
- free_cnode:
+free_cnode:
last = cn;
cn = cn->next;
if (saved_bh) {
- /* we incremented this to keep others from taking the buffer head away */
+ /*
+ * we incremented this to keep others from
+ * taking the buffer head away
+ */
put_bh(saved_bh);
- if (atomic_read(&(saved_bh->b_count)) < 0) {
+ if (atomic_read(&saved_bh->b_count) < 0) {
reiserfs_warning(s, "journal-945",
"saved_bh->b_count < 0");
}
#endif
err = -EIO;
}
- /* note, we must clear the JDirty_wait bit after the up to date
- ** check, otherwise we race against our flushpage routine
+ /*
+ * note, we must clear the JDirty_wait bit
+ * after the up to date check, otherwise we
+ * race against our flushpage routine
*/
BUG_ON(!test_clear_buffer_journal_dirty
(cn->bh));
reiserfs_abort(s, -EIO,
"Write error while pushing transaction to disk in %s",
__func__);
- flush_older_and_return:
+flush_older_and_return:
- /* before we can update the journal header block, we _must_ flush all
- ** real blocks from all older transactions to disk. This is because
- ** once the header block is updated, this transaction will not be
- ** replayed after a crash
+ /*
+ * before we can update the journal header block, we _must_ flush all
+ * real blocks from all older transactions to disk. This is because
+ * once the header block is updated, this transaction will not be
+ * replayed after a crash
*/
if (flushall) {
flush_older_journal_lists(s, jl);
}
err = journal->j_errno;
- /* before we can remove everything from the hash tables for this
- ** transaction, we must make sure it can never be replayed
- **
- ** since we are only called from do_journal_end, we know for sure there
- ** are no allocations going on while we are flushing journal lists. So,
- ** we only need to update the journal header block for the last list
- ** being flushed
+ /*
+ * before we can remove everything from the hash tables for this
+ * transaction, we must make sure it can never be replayed
+ *
+ * since we are only called from do_journal_end, we know for sure there
+ * are no allocations going on while we are flushing journal lists. So,
+ * we only need to update the journal header block for the last list
+ * being flushed
*/
if (!err && flushall) {
err =
}
journal->j_last_flush_id = jl->j_trans_id;
- /* not strictly required since we are freeing the list, but it should
+ /*
+ * not strictly required since we are freeing the list, but it should
* help find code using dead lists later on
*/
jl->j_len = 0;
- atomic_set(&(jl->j_nonzerolen), 0);
+ atomic_set(&jl->j_nonzerolen, 0);
jl->j_start = 0;
jl->j_realblock = NULL;
jl->j_commit_bh = NULL;
cn = jl->j_realblock;
while (cn) {
- /* if the blocknr == 0, this has been cleared from the hash,
- ** skip it
+ /*
+ * if the blocknr == 0, this has been cleared from the hash,
+ * skip it
*/
if (cn->blocknr == 0) {
goto next;
}
if (cn->bh && can_dirty(cn) && buffer_dirty(cn->bh)) {
struct buffer_head *tmp_bh;
- /* we can race against journal_mark_freed when we try
+ /*
+ * we can race against journal_mark_freed when we try
* to lock_buffer(cn->bh), so we have to inc the buffer
* count, and recheck things after locking
*/
}
put_bh(tmp_bh);
}
- next:
+next:
cn = cn->next;
cond_resched();
}
jl->j_state |= LIST_DIRTY;
cn = jl->j_realblock;
while (cn) {
- /* look for a more recent transaction that logged this
- ** buffer. Only the most recent transaction with a buffer in
- ** it is allowed to send that buffer to disk
+ /*
+ * look for a more recent transaction that logged this
+ * buffer. Only the most recent transaction with a buffer in
+ * it is allowed to send that buffer to disk
*/
pjl = find_newer_jl_for_cn(cn);
if (!pjl && cn->blocknr && cn->bh
&& buffer_journal_dirty(cn->bh)) {
BUG_ON(!can_dirty(cn));
- /* if the buffer is prepared, it will either be logged
+ /*
+ * if the buffer is prepared, it will either be logged
* or restored. If restored, we need to make sure
* it actually gets marked dirty
*/
goto done;
}
- /* we've got j_flush_mutex held, nobody is going to delete any
+ /*
+ * we've got j_flush_mutex held, nobody is going to delete any
* of these lists out from underneath us
*/
while ((num_trans && transactions_flushed < num_trans) ||
write_chunk(&chunk);
}
- done:
+done:
mutex_unlock(&journal->j_flush_mutex);
return ret;
}
-/* for o_sync and fsync heavy applications, they tend to use
-** all the journa list slots with tiny transactions. These
-** trigger lots and lots of calls to update the header block, which
-** adds seeks and slows things down.
-**
-** This function tries to clear out a large chunk of the journal lists
-** at once, which makes everything faster since only the newest journal
-** list updates the header block
-*/
+/*
+ * for o_sync and fsync heavy applications, they tend to use
+ * all the journa list slots with tiny transactions. These
+ * trigger lots and lots of calls to update the header block, which
+ * adds seeks and slows things down.
+ *
+ * This function tries to clear out a large chunk of the journal lists
+ * at once, which makes everything faster since only the newest journal
+ * list updates the header block
+ */
static int flush_used_journal_lists(struct super_block *s,
struct reiserfs_journal_list *jl)
{
}
get_journal_list(jl);
get_journal_list(flush_jl);
- /* try to find a group of blocks we can flush across all the
- ** transactions, but only bother if we've actually spanned
- ** across multiple lists
+
+ /*
+ * try to find a group of blocks we can flush across all the
+ * transactions, but only bother if we've actually spanned
+ * across multiple lists
*/
if (flush_jl != jl) {
ret = kupdate_transactions(s, jl, &tjl, &trans_id, len, i);
}
/*
-** removes any nodes in table with name block and dev as bh.
-** only touchs the hnext and hprev pointers.
-*/
+ * removes any nodes in table with name block and dev as bh.
+ * only touchs the hnext and hprev pointers.
+ */
void remove_journal_hash(struct super_block *sb,
struct reiserfs_journal_cnode **table,
struct reiserfs_journal_list *jl,
cur->blocknr = 0;
cur->sb = NULL;
cur->state = 0;
- if (cur->bh && cur->jlist) /* anybody who clears the cur->bh will also dec the nonzerolen */
- atomic_dec(&(cur->jlist->j_nonzerolen));
+ /*
+ * anybody who clears the cur->bh will also
+ * dec the nonzerolen
+ */
+ if (cur->bh && cur->jlist)
+ atomic_dec(&cur->jlist->j_nonzerolen);
cur->bh = NULL;
cur->jlist = NULL;
}
if (journal->j_header_bh) {
brelse(journal->j_header_bh);
}
- /* j_header_bh is on the journal dev, make sure not to release the journal
- * dev until we brelse j_header_bh
+ /*
+ * j_header_bh is on the journal dev, make sure
+ * not to release the journal dev until we brelse j_header_bh
*/
release_journal_dev(sb, journal);
vfree(journal);
}
/*
-** call on unmount. Only set error to 1 if you haven't made your way out
-** of read_super() yet. Any other caller must keep error at 0.
-*/
+ * call on unmount. Only set error to 1 if you haven't made your way out
+ * of read_super() yet. Any other caller must keep error at 0.
+ */
static int do_journal_release(struct reiserfs_transaction_handle *th,
struct super_block *sb, int error)
{
int flushed = 0;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
- /* we only want to flush out transactions if we were called with error == 0
+ /*
+ * we only want to flush out transactions if we were
+ * called with error == 0
*/
if (!error && !(sb->s_flags & MS_RDONLY)) {
/* end the current trans */
BUG_ON(!th->t_trans_id);
- do_journal_end(th, sb, 10, FLUSH_ALL);
+ do_journal_end(th, FLUSH_ALL);
- /* make sure something gets logged to force our way into the flush code */
- if (!journal_join(&myth, sb, 1)) {
+ /*
+ * make sure something gets logged to force
+ * our way into the flush code
+ */
+ if (!journal_join(&myth, sb)) {
reiserfs_prepare_for_journal(sb,
SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(&myth, sb,
- SB_BUFFER_WITH_SB(sb));
- do_journal_end(&myth, sb, 1, FLUSH_ALL);
+ journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
+ do_journal_end(&myth, FLUSH_ALL);
flushed = 1;
}
}
/* this also catches errors during the do_journal_end above */
if (!error && reiserfs_is_journal_aborted(journal)) {
memset(&myth, 0, sizeof(myth));
- if (!journal_join_abort(&myth, sb, 1)) {
+ if (!journal_join_abort(&myth, sb)) {
reiserfs_prepare_for_journal(sb,
SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(&myth, sb,
- SB_BUFFER_WITH_SB(sb));
- do_journal_end(&myth, sb, 1, FLUSH_ALL);
+ journal_mark_dirty(&myth, SB_BUFFER_WITH_SB(sb));
+ do_journal_end(&myth, FLUSH_ALL);
}
}
return 0;
}
-/*
-** call on unmount. flush all journal trans, release all alloc'd ram
-*/
+/* * call on unmount. flush all journal trans, release all alloc'd ram */
int journal_release(struct reiserfs_transaction_handle *th,
struct super_block *sb)
{
return do_journal_release(th, sb, 0);
}
-/*
-** only call from an error condition inside reiserfs_read_super!
-*/
+/* only call from an error condition inside reiserfs_read_super! */
int journal_release_error(struct reiserfs_transaction_handle *th,
struct super_block *sb)
{
return do_journal_release(th, sb, 1);
}
-/* compares description block with commit block. returns 1 if they differ, 0 if they are the same */
+/*
+ * compares description block with commit block.
+ * returns 1 if they differ, 0 if they are the same
+ */
static int journal_compare_desc_commit(struct super_block *sb,
struct reiserfs_journal_desc *desc,
struct reiserfs_journal_commit *commit)
return 0;
}
-/* returns 0 if it did not find a description block
-** returns -1 if it found a corrupt commit block
-** returns 1 if both desc and commit were valid
-** NOTE: only called during fs mount
-*/
+/*
+ * returns 0 if it did not find a description block
+ * returns -1 if it found a corrupt commit block
+ * returns 1 if both desc and commit were valid
+ * NOTE: only called during fs mount
+ */
static int journal_transaction_is_valid(struct super_block *sb,
struct buffer_head *d_bh,
unsigned int *oldest_invalid_trans_id,
}
offset = d_bh->b_blocknr - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
- /* ok, we have a journal description block, lets see if the transaction was valid */
+ /*
+ * ok, we have a journal description block,
+ * let's see if the transaction was valid
+ */
c_bh =
journal_bread(sb,
SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
}
/*
-** given the start, and values for the oldest acceptable transactions,
-** this either reads in a replays a transaction, or returns because the
-** transaction is invalid, or too old.
-** NOTE: only called during fs mount
-*/
+ * given the start, and values for the oldest acceptable transactions,
+ * this either reads in a replays a transaction, or returns because the
+ * transaction is invalid, or too old.
+ * NOTE: only called during fs mount
+ */
static int journal_read_transaction(struct super_block *sb,
unsigned long cur_dblock,
unsigned long oldest_start,
}
trans_id = get_desc_trans_id(desc);
- /* now we know we've got a good transaction, and it was inside the valid time ranges */
+ /*
+ * now we know we've got a good transaction, and it was
+ * inside the valid time ranges
+ */
log_blocks = kmalloc(get_desc_trans_len(desc) *
sizeof(struct buffer_head *), GFP_NOFS);
real_blocks = kmalloc(get_desc_trans_len(desc) *
reiserfs_warning(sb, "journal-1204",
"REPLAY FAILURE fsck required! "
"Trying to replay onto a log block");
- abort_replay:
+abort_replay:
brelse_array(log_blocks, i);
brelse_array(real_blocks, i);
brelse(c_bh);
"journal-1095: setting journal " "start to offset %ld",
cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb));
- /* init starting values for the first transaction, in case this is the last transaction to be replayed. */
+ /*
+ * init starting values for the first transaction, in case
+ * this is the last transaction to be replayed.
+ */
journal->j_start = cur_dblock - SB_ONDISK_JOURNAL_1st_BLOCK(sb);
journal->j_last_flush_trans_id = trans_id;
journal->j_trans_id = trans_id + 1;
return 0;
}
-/* This function reads blocks starting from block and to max_block of bufsize
- size (but no more than BUFNR blocks at a time). This proved to improve
- mounting speed on self-rebuilding raid5 arrays at least.
- Right now it is only used from journal code. But later we might use it
- from other places.
- Note: Do not use journal_getblk/sb_getblk functions here! */
+/*
+ * This function reads blocks starting from block and to max_block of bufsize
+ * size (but no more than BUFNR blocks at a time). This proved to improve
+ * mounting speed on self-rebuilding raid5 arrays at least.
+ * Right now it is only used from journal code. But later we might use it
+ * from other places.
+ * Note: Do not use journal_getblk/sb_getblk functions here!
+ */
static struct buffer_head *reiserfs_breada(struct block_device *dev,
b_blocknr_t block, int bufsize,
b_blocknr_t max_block)
}
/*
-** read and replay the log
-** on a clean unmount, the journal header's next unflushed pointer will
-** be to an invalid transaction. This tests that before finding all the
-** transactions in the log, which makes normal mount times fast.
-** After a crash, this starts with the next unflushed transaction, and
-** replays until it finds one too old, or invalid.
-** On exit, it sets things up so the first transaction will work correctly.
-** NOTE: only called during fs mount
-*/
+ * read and replay the log
+ * on a clean unmount, the journal header's next unflushed pointer will be
+ * to an invalid transaction. This tests that before finding all the
+ * transactions in the log, which makes normal mount times fast.
+ *
+ * After a crash, this starts with the next unflushed transaction, and
+ * replays until it finds one too old, or invalid.
+ *
+ * On exit, it sets things up so the first transaction will work correctly.
+ * NOTE: only called during fs mount
+ */
static int journal_read(struct super_block *sb)
{
struct reiserfs_journal *journal = SB_JOURNAL(sb);
bdevname(journal->j_dev_bd, b));
start = get_seconds();
- /* step 1, read in the journal header block. Check the transaction it says
- ** is the first unflushed, and if that transaction is not valid,
- ** replay is done
+ /*
+ * step 1, read in the journal header block. Check the transaction
+ * it says is the first unflushed, and if that transaction is not
+ * valid, replay is done
*/
journal->j_header_bh = journal_bread(sb,
SB_ONDISK_JOURNAL_1st_BLOCK(sb)
le32_to_cpu(jh->j_last_flush_trans_id));
valid_journal_header = 1;
- /* now, we try to read the first unflushed offset. If it is not valid,
- ** there is nothing more we can do, and it makes no sense to read
- ** through the whole log.
+ /*
+ * now, we try to read the first unflushed offset. If it
+ * is not valid, there is nothing more we can do, and it
+ * makes no sense to read through the whole log.
*/
d_bh =
journal_bread(sb,
goto start_log_replay;
}
- /* ok, there are transactions that need to be replayed. start with the first log block, find
- ** all the valid transactions, and pick out the oldest.
+ /*
+ * ok, there are transactions that need to be replayed. start
+ * with the first log block, find all the valid transactions, and
+ * pick out the oldest.
*/
while (continue_replay
&& cur_dblock <
(SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
SB_ONDISK_JOURNAL_SIZE(sb))) {
- /* Note that it is required for blocksize of primary fs device and journal
- device to be the same */
+ /*
+ * Note that it is required for blocksize of primary fs
+ * device and journal device to be the same
+ */
d_bh =
reiserfs_breada(journal->j_dev_bd, cur_dblock,
sb->s_blocksize,
brelse(d_bh);
}
- start_log_replay:
+start_log_replay:
cur_dblock = oldest_start;
if (oldest_trans_id) {
reiserfs_debug(sb, REISERFS_DEBUG_CODE,
reiserfs_debug(sb, REISERFS_DEBUG_CODE,
"journal-1225: No valid " "transactions found");
}
- /* j_start does not get set correctly if we don't replay any transactions.
- ** if we had a valid journal_header, set j_start to the first unflushed transaction value,
- ** copy the trans_id from the header
+ /*
+ * j_start does not get set correctly if we don't replay any
+ * transactions. if we had a valid journal_header, set j_start
+ * to the first unflushed transaction value, copy the trans_id
+ * from the header
*/
if (valid_journal_header && replay_count == 0) {
journal->j_start = le32_to_cpu(jh->j_first_unflushed_offset);
_update_journal_header_block(sb, journal->j_start,
journal->j_last_flush_trans_id)) {
reiserfs_write_unlock(sb);
- /* replay failed, caller must call free_journal_ram and abort
- ** the mount
+ /*
+ * replay failed, caller must call free_journal_ram and abort
+ * the mount
*/
return -1;
}
return 0;
}
-/**
+/*
* When creating/tuning a file system user can assign some
* journal params within boundaries which depend on the ratio
* blocksize/standard_blocksize.
struct reiserfs_journal *journal)
{
if (journal->j_trans_max) {
- /* Non-default journal params.
- Do sanity check for them. */
+ /* Non-default journal params. Do sanity check for them. */
int ratio = 1;
if (sb->s_blocksize < REISERFS_STANDARD_BLKSIZE)
ratio = REISERFS_STANDARD_BLKSIZE / sb->s_blocksize;
return 1;
}
} else {
- /* Default journal params.
- The file system was created by old version
- of mkreiserfs, so some fields contain zeros,
- and we need to advise proper values for them */
+ /*
+ * Default journal params.
+ * The file system was created by old version
+ * of mkreiserfs, so some fields contain zeros,
+ * and we need to advise proper values for them
+ */
if (sb->s_blocksize != REISERFS_STANDARD_BLKSIZE) {
reiserfs_warning(sb, "sh-464", "bad blocksize (%u)",
sb->s_blocksize);
return 0;
}
-/*
-** must be called once on fs mount. calls journal_read for you
-*/
+/* must be called once on fs mount. calls journal_read for you */
int journal_init(struct super_block *sb, const char *j_dev_name,
int old_format, unsigned int commit_max_age)
{
REISERFS_DISK_OFFSET_IN_BYTES /
sb->s_blocksize + 2);
- /* Sanity check to see is the standard journal fitting within first bitmap
- (actual for small blocksizes) */
+ /*
+ * Sanity check to see is the standard journal fitting
+ * within first bitmap (actual for small blocksizes)
+ */
if (!SB_ONDISK_JOURNAL_DEVICE(sb) &&
(SB_JOURNAL_1st_RESERVED_BLOCK(sb) +
SB_ONDISK_JOURNAL_SIZE(sb) > sb->s_blocksize * 8)) {
journal->j_start = 0;
journal->j_len = 0;
journal->j_len_alloc = 0;
- atomic_set(&(journal->j_wcount), 0);
- atomic_set(&(journal->j_async_throttle), 0);
+ atomic_set(&journal->j_wcount, 0);
+ atomic_set(&journal->j_async_throttle, 0);
journal->j_bcount = 0;
journal->j_trans_start_time = 0;
journal->j_last = NULL;
journal->j_first = NULL;
- init_waitqueue_head(&(journal->j_join_wait));
+ init_waitqueue_head(&journal->j_join_wait);
mutex_init(&journal->j_mutex);
mutex_init(&journal->j_flush_mutex);
journal->j_trans_id = 10;
journal->j_mount_id = 10;
journal->j_state = 0;
- atomic_set(&(journal->j_jlock), 0);
+ atomic_set(&journal->j_jlock, 0);
journal->j_cnode_free_list = allocate_cnodes(num_cnodes);
journal->j_cnode_free_orig = journal->j_cnode_free_list;
journal->j_cnode_free = journal->j_cnode_free_list ? num_cnodes : 0;
INIT_DELAYED_WORK(&journal->j_work, flush_async_commits);
journal->j_work_sb = sb;
return 0;
- free_and_return:
+free_and_return:
free_journal_ram(sb);
return 1;
}
/*
-** test for a polite end of the current transaction. Used by file_write, and should
-** be used by delete to make sure they don't write more than can fit inside a single
-** transaction
-*/
+ * test for a polite end of the current transaction. Used by file_write,
+ * and should be used by delete to make sure they don't write more than
+ * can fit inside a single transaction
+ */
int journal_transaction_should_end(struct reiserfs_transaction_handle *th,
int new_alloc)
{
return 0;
if (journal->j_must_wait > 0 ||
(journal->j_len_alloc + new_alloc) >= journal->j_max_batch ||
- atomic_read(&(journal->j_jlock)) ||
+ atomic_read(&journal->j_jlock) ||
(now - journal->j_trans_start_time) > journal->j_max_trans_age ||
journal->j_cnode_free < (journal->j_trans_max * 3)) {
return 1;
return 0;
}
-/* this must be called inside a transaction
-*/
+/* this must be called inside a transaction */
void reiserfs_block_writes(struct reiserfs_transaction_handle *th)
{
struct reiserfs_journal *journal = SB_JOURNAL(th->t_super);
return;
}
-/* this must be called without a transaction started
-*/
+/* this must be called without a transaction started */
void reiserfs_allow_writes(struct super_block *s)
{
struct reiserfs_journal *journal = SB_JOURNAL(s);
wake_up(&journal->j_join_wait);
}
-/* this must be called without a transaction started
-*/
+/* this must be called without a transaction started */
void reiserfs_wait_on_write_block(struct super_block *s)
{
struct reiserfs_journal *journal = SB_JOURNAL(s);
}
}
-/* join == true if you must join an existing transaction.
-** join == false if you can deal with waiting for others to finish
-**
-** this will block until the transaction is joinable. send the number of blocks you
-** expect to use in nblocks.
+/*
+ * join == true if you must join an existing transaction.
+ * join == false if you can deal with waiting for others to finish
+ *
+ * this will block until the transaction is joinable. send the number of
+ * blocks you expect to use in nblocks.
*/
static int do_journal_begin_r(struct reiserfs_transaction_handle *th,
struct super_block *sb, unsigned long nblocks,
th->t_refcount = 1;
th->t_super = sb;
- relock:
+relock:
lock_journal(sb);
if (join != JBEGIN_ABORT && reiserfs_is_journal_aborted(journal)) {
unlock_journal(sb);
}
now = get_seconds();
- /* if there is no room in the journal OR
- ** if this transaction is too old, and we weren't called joinable, wait for it to finish before beginning
- ** we don't sleep if there aren't other writers
+ /*
+ * if there is no room in the journal OR
+ * if this transaction is too old, and we weren't called joinable,
+ * wait for it to finish before beginning we don't sleep if there
+ * aren't other writers
*/
if ((!join && journal->j_must_wait > 0) ||
|| (!join && journal->j_cnode_free < (journal->j_trans_max * 3))) {
old_trans_id = journal->j_trans_id;
- unlock_journal(sb); /* allow others to finish this transaction */
+ /* allow others to finish this transaction */
+ unlock_journal(sb);
if (!join && (journal->j_len_alloc + nblocks + 2) >=
journal->j_max_batch &&
goto relock;
}
}
- /* don't mess with joining the transaction if all we have to do is
- * wait for someone else to do a commit
+ /*
+ * don't mess with joining the transaction if all we
+ * have to do is wait for someone else to do a commit
*/
if (atomic_read(&journal->j_jlock)) {
while (journal->j_trans_id == old_trans_id &&
}
goto relock;
}
- retval = journal_join(&myth, sb, 1);
+ retval = journal_join(&myth, sb);
if (retval)
goto out_fail;
/* someone might have ended the transaction while we joined */
if (old_trans_id != journal->j_trans_id) {
- retval = do_journal_end(&myth, sb, 1, 0);
+ retval = do_journal_end(&myth, 0);
} else {
- retval = do_journal_end(&myth, sb, 1, COMMIT_NOW);
+ retval = do_journal_end(&myth, COMMIT_NOW);
}
if (retval)
if (journal->j_trans_start_time == 0) {
journal->j_trans_start_time = get_seconds();
}
- atomic_inc(&(journal->j_wcount));
+ atomic_inc(&journal->j_wcount);
journal->j_len_alloc += nblocks;
th->t_blocks_logged = 0;
th->t_blocks_allocated = nblocks;
INIT_LIST_HEAD(&th->t_list);
return 0;
- out_fail:
+out_fail:
memset(th, 0, sizeof(*th));
- /* Re-set th->t_super, so we can properly keep track of how many
+ /*
+ * Re-set th->t_super, so we can properly keep track of how many
* persistent transactions there are. We need to do this so if this
- * call is part of a failed restart_transaction, we can free it later */
+ * call is part of a failed restart_transaction, we can free it later
+ */
th->t_super = sb;
return retval;
}
int ret;
struct reiserfs_transaction_handle *th;
- /* if we're nesting into an existing transaction. It will be
- ** persistent on its own
+ /*
+ * if we're nesting into an existing transaction. It will be
+ * persistent on its own
*/
if (reiserfs_transaction_running(s)) {
th = current->journal_info;
th->t_refcount++;
BUG_ON(th->t_refcount < 2);
-
+
return th;
}
th = kmalloc(sizeof(struct reiserfs_transaction_handle), GFP_NOFS);
struct super_block *s = th->t_super;
int ret = 0;
if (th->t_trans_id)
- ret = journal_end(th, th->t_super, th->t_blocks_allocated);
+ ret = journal_end(th);
else
ret = -EIO;
if (th->t_refcount == 0) {
}
static int journal_join(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks)
+ struct super_block *sb)
{
struct reiserfs_transaction_handle *cur_th = current->journal_info;
- /* this keeps do_journal_end from NULLing out the current->journal_info
- ** pointer
+ /*
+ * this keeps do_journal_end from NULLing out the
+ * current->journal_info pointer
*/
th->t_handle_save = cur_th;
BUG_ON(cur_th && cur_th->t_refcount > 1);
- return do_journal_begin_r(th, sb, nblocks, JBEGIN_JOIN);
+ return do_journal_begin_r(th, sb, 1, JBEGIN_JOIN);
}
int journal_join_abort(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks)
+ struct super_block *sb)
{
struct reiserfs_transaction_handle *cur_th = current->journal_info;
- /* this keeps do_journal_end from NULLing out the current->journal_info
- ** pointer
+ /*
+ * this keeps do_journal_end from NULLing out the
+ * current->journal_info pointer
*/
th->t_handle_save = cur_th;
BUG_ON(cur_th && cur_th->t_refcount > 1);
- return do_journal_begin_r(th, sb, nblocks, JBEGIN_ABORT);
+ return do_journal_begin_r(th, sb, 1, JBEGIN_ABORT);
}
int journal_begin(struct reiserfs_transaction_handle *th,
"journal_info != 0");
return 0;
} else {
- /* we've ended up with a handle from a different filesystem.
- ** save it and restore on journal_end. This should never
- ** really happen...
+ /*
+ * we've ended up with a handle from a different
+ * filesystem. save it and restore on journal_end.
+ * This should never really happen...
*/
reiserfs_warning(sb, "clm-2100",
"nesting info a different FS");
ret = do_journal_begin_r(th, sb, nblocks, JBEGIN_REG);
BUG_ON(current->journal_info != th);
- /* I guess this boils down to being the reciprocal of clm-2100 above.
- * If do_journal_begin_r fails, we need to put it back, since journal_end
- * won't be called to do it. */
+ /*
+ * I guess this boils down to being the reciprocal of clm-2100 above.
+ * If do_journal_begin_r fails, we need to put it back, since
+ * journal_end won't be called to do it. */
if (ret)
current->journal_info = th->t_handle_save;
else
}
/*
-** puts bh into the current transaction. If it was already there, reorders removes the
-** old pointers from the hash, and puts new ones in (to make sure replay happen in the right order).
-**
-** if it was dirty, cleans and files onto the clean list. I can't let it be dirty again until the
-** transaction is committed.
-**
-** if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
-*/
+ * puts bh into the current transaction. If it was already there, reorders
+ * removes the old pointers from the hash, and puts new ones in (to make
+ * sure replay happen in the right order).
+ *
+ * if it was dirty, cleans and files onto the clean list. I can't let it
+ * be dirty again until the transaction is committed.
+ *
+ * if j_len, is bigger than j_len_alloc, it pushes j_len_alloc to 10 + j_len.
+ */
int journal_mark_dirty(struct reiserfs_transaction_handle *th,
- struct super_block *sb, struct buffer_head *bh)
+ struct buffer_head *bh)
{
+ struct super_block *sb = th->t_super;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
struct reiserfs_journal_cnode *cn = NULL;
int count_already_incd = 0;
return 0;
}
- /* this must be turned into a panic instead of a warning. We can't allow
- ** a dirty or journal_dirty or locked buffer to be logged, as some changes
- ** could get to disk too early. NOT GOOD.
+ /*
+ * this must be turned into a panic instead of a warning. We can't
+ * allow a dirty or journal_dirty or locked buffer to be logged, as
+ * some changes could get to disk too early. NOT GOOD.
*/
if (!prepared || buffer_dirty(bh)) {
reiserfs_warning(sb, "journal-1777",
buffer_journal_dirty(bh) ? ' ' : '!');
}
- if (atomic_read(&(journal->j_wcount)) <= 0) {
+ if (atomic_read(&journal->j_wcount) <= 0) {
reiserfs_warning(sb, "journal-1409",
"returning because j_wcount was %d",
- atomic_read(&(journal->j_wcount)));
+ atomic_read(&journal->j_wcount));
return 1;
}
- /* this error means I've screwed up, and we've overflowed the transaction.
- ** Nothing can be done here, except make the FS readonly or panic.
+ /*
+ * this error means I've screwed up, and we've overflowed
+ * the transaction. Nothing can be done here, except make the
+ * FS readonly or panic.
*/
if (journal->j_len >= journal->j_trans_max) {
reiserfs_panic(th->t_super, "journal-1413",
return 0;
}
-int journal_end(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks)
+int journal_end(struct reiserfs_transaction_handle *th)
{
+ struct super_block *sb = th->t_super;
if (!current->journal_info && th->t_refcount > 1)
reiserfs_warning(sb, "REISER-NESTING",
"th NULL, refcount %d", th->t_refcount);
struct reiserfs_transaction_handle *cur_th =
current->journal_info;
- /* we aren't allowed to close a nested transaction on a different
- ** filesystem from the one in the task struct
+ /*
+ * we aren't allowed to close a nested transaction on a
+ * different filesystem from the one in the task struct
*/
BUG_ON(cur_th->t_super != th->t_super);
}
return 0;
} else {
- return do_journal_end(th, sb, nblocks, 0);
+ return do_journal_end(th, 0);
}
}
-/* removes from the current transaction, relsing and descrementing any counters.
-** also files the removed buffer directly onto the clean list
-**
-** called by journal_mark_freed when a block has been deleted
-**
-** returns 1 if it cleaned and relsed the buffer. 0 otherwise
-*/
+/*
+ * removes from the current transaction, relsing and descrementing any counters.
+ * also files the removed buffer directly onto the clean list
+ *
+ * called by journal_mark_freed when a block has been deleted
+ *
+ * returns 1 if it cleaned and relsed the buffer. 0 otherwise
+ */
static int remove_from_transaction(struct super_block *sb,
b_blocknr_t blocknr, int already_cleaned)
{
clear_buffer_dirty(bh);
clear_buffer_journal_test(bh);
put_bh(bh);
- if (atomic_read(&(bh->b_count)) < 0) {
+ if (atomic_read(&bh->b_count) < 0) {
reiserfs_warning(sb, "journal-1752",
"b_count < 0");
}
}
/*
-** for any cnode in a journal list, it can only be dirtied of all the
-** transactions that include it are committed to disk.
-** this checks through each transaction, and returns 1 if you are allowed to dirty,
-** and 0 if you aren't
-**
-** it is called by dirty_journal_list, which is called after flush_commit_list has gotten all the log
-** blocks for a given transaction on disk
-**
-*/
+ * for any cnode in a journal list, it can only be dirtied of all the
+ * transactions that include it are committed to disk.
+ * this checks through each transaction, and returns 1 if you are allowed
+ * to dirty, and 0 if you aren't
+ *
+ * it is called by dirty_journal_list, which is called after
+ * flush_commit_list has gotten all the log blocks for a given
+ * transaction on disk
+ *
+ */
static int can_dirty(struct reiserfs_journal_cnode *cn)
{
struct super_block *sb = cn->sb;
struct reiserfs_journal_cnode *cur = cn->hprev;
int can_dirty = 1;
- /* first test hprev. These are all newer than cn, so any node here
- ** with the same block number and dev means this node can't be sent
- ** to disk right now.
+ /*
+ * first test hprev. These are all newer than cn, so any node here
+ * with the same block number and dev means this node can't be sent
+ * to disk right now.
*/
while (cur && can_dirty) {
if (cur->jlist && cur->bh && cur->blocknr && cur->sb == sb &&
}
cur = cur->hprev;
}
- /* then test hnext. These are all older than cn. As long as they
- ** are committed to the log, it is safe to write cn to disk
+ /*
+ * then test hnext. These are all older than cn. As long as they
+ * are committed to the log, it is safe to write cn to disk
*/
cur = cn->hnext;
while (cur && can_dirty) {
if (cur->jlist && cur->jlist->j_len > 0 &&
- atomic_read(&(cur->jlist->j_commit_left)) > 0 && cur->bh &&
+ atomic_read(&cur->jlist->j_commit_left) > 0 && cur->bh &&
cur->blocknr && cur->sb == sb && cur->blocknr == blocknr) {
can_dirty = 0;
}
return can_dirty;
}
-/* syncs the commit blocks, but does not force the real buffers to disk
-** will wait until the current transaction is done/committed before returning
-*/
-int journal_end_sync(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks)
+/*
+ * syncs the commit blocks, but does not force the real buffers to disk
+ * will wait until the current transaction is done/committed before returning
+ */
+int journal_end_sync(struct reiserfs_transaction_handle *th)
{
+ struct super_block *sb = th->t_super;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
BUG_ON(!th->t_trans_id);
if (journal->j_len == 0) {
reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb));
+ journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
}
- return do_journal_end(th, sb, nblocks, COMMIT_NOW | WAIT);
+ return do_journal_end(th, COMMIT_NOW | WAIT);
}
-/*
-** writeback the pending async commits to disk
-*/
+/* writeback the pending async commits to disk */
static void flush_async_commits(struct work_struct *work)
{
struct reiserfs_journal *journal =
}
/*
-** flushes any old transactions to disk
-** ends the current transaction if it is too old
-*/
+ * flushes any old transactions to disk
+ * ends the current transaction if it is too old
+ */
void reiserfs_flush_old_commits(struct super_block *sb)
{
time_t now;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
now = get_seconds();
- /* safety check so we don't flush while we are replaying the log during
+ /*
+ * safety check so we don't flush while we are replaying the log during
* mount
*/
if (list_empty(&journal->j_journal_list))
return;
- /* check the current transaction. If there are no writers, and it is
+ /*
+ * check the current transaction. If there are no writers, and it is
* too old, finish it, and force the commit blocks to disk
*/
if (atomic_read(&journal->j_wcount) <= 0 &&
journal->j_trans_start_time > 0 &&
journal->j_len > 0 &&
(now - journal->j_trans_start_time) > journal->j_max_trans_age) {
- if (!journal_join(&th, sb, 1)) {
+ if (!journal_join(&th, sb)) {
reiserfs_prepare_for_journal(sb,
SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(&th, sb,
- SB_BUFFER_WITH_SB(sb));
+ journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
- /* we're only being called from kreiserfsd, it makes no sense to do
- ** an async commit so that kreiserfsd can do it later
+ /*
+ * we're only being called from kreiserfsd, it makes
+ * no sense to do an async commit so that kreiserfsd
+ * can do it later
*/
- do_journal_end(&th, sb, 1, COMMIT_NOW | WAIT);
+ do_journal_end(&th, COMMIT_NOW | WAIT);
}
}
}
/*
-** returns 0 if do_journal_end should return right away, returns 1 if do_journal_end should finish the commit
-**
-** if the current transaction is too old, but still has writers, this will wait on j_join_wait until all
-** the writers are done. By the time it wakes up, the transaction it was called has already ended, so it just
-** flushes the commit list and returns 0.
-**
-** Won't batch when flush or commit_now is set. Also won't batch when others are waiting on j_join_wait.
-**
-** Note, we can't allow the journal_end to proceed while there are still writers in the log.
-*/
-static int check_journal_end(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks,
- int flags)
+ * returns 0 if do_journal_end should return right away, returns 1 if
+ * do_journal_end should finish the commit
+ *
+ * if the current transaction is too old, but still has writers, this will
+ * wait on j_join_wait until all the writers are done. By the time it
+ * wakes up, the transaction it was called has already ended, so it just
+ * flushes the commit list and returns 0.
+ *
+ * Won't batch when flush or commit_now is set. Also won't batch when
+ * others are waiting on j_join_wait.
+ *
+ * Note, we can't allow the journal_end to proceed while there are still
+ * writers in the log.
+ */
+static int check_journal_end(struct reiserfs_transaction_handle *th, int flags)
{
time_t now;
int commit_now = flags & COMMIT_NOW;
int wait_on_commit = flags & WAIT;
struct reiserfs_journal_list *jl;
+ struct super_block *sb = th->t_super;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
BUG_ON(!th->t_trans_id);
}
journal->j_len_alloc -= (th->t_blocks_allocated - th->t_blocks_logged);
- if (atomic_read(&(journal->j_wcount)) > 0) { /* <= 0 is allowed. unmounting might not call begin */
- atomic_dec(&(journal->j_wcount));
- }
+ /* <= 0 is allowed. unmounting might not call begin */
+ if (atomic_read(&journal->j_wcount) > 0)
+ atomic_dec(&journal->j_wcount);
- /* BUG, deal with case where j_len is 0, but people previously freed blocks need to be released
- ** will be dealt with by next transaction that actually writes something, but should be taken
- ** care of in this trans
+ /*
+ * BUG, deal with case where j_len is 0, but people previously
+ * freed blocks need to be released will be dealt with by next
+ * transaction that actually writes something, but should be taken
+ * care of in this trans
*/
BUG_ON(journal->j_len == 0);
- /* if wcount > 0, and we are called to with flush or commit_now,
- ** we wait on j_join_wait. We will wake up when the last writer has
- ** finished the transaction, and started it on its way to the disk.
- ** Then, we flush the commit or journal list, and just return 0
- ** because the rest of journal end was already done for this transaction.
+ /*
+ * if wcount > 0, and we are called to with flush or commit_now,
+ * we wait on j_join_wait. We will wake up when the last writer has
+ * finished the transaction, and started it on its way to the disk.
+ * Then, we flush the commit or journal list, and just return 0
+ * because the rest of journal end was already done for this
+ * transaction.
*/
- if (atomic_read(&(journal->j_wcount)) > 0) {
+ if (atomic_read(&journal->j_wcount) > 0) {
if (flush || commit_now) {
unsigned trans_id;
trans_id = jl->j_trans_id;
if (wait_on_commit)
jl->j_state |= LIST_COMMIT_PENDING;
- atomic_set(&(journal->j_jlock), 1);
+ atomic_set(&journal->j_jlock, 1);
if (flush) {
journal->j_next_full_flush = 1;
}
unlock_journal(sb);
- /* sleep while the current transaction is still j_jlocked */
+ /*
+ * sleep while the current transaction is
+ * still j_jlocked
+ */
while (journal->j_trans_id == trans_id) {
if (atomic_read(&journal->j_jlock)) {
queue_log_writer(sb);
} else {
lock_journal(sb);
if (journal->j_trans_id == trans_id) {
- atomic_set(&(journal->j_jlock),
+ atomic_set(&journal->j_jlock,
1);
}
unlock_journal(sb);
}
}
BUG_ON(journal->j_trans_id == trans_id);
-
+
if (commit_now
&& journal_list_still_alive(sb, trans_id)
&& wait_on_commit) {
}
/* don't batch when someone is waiting on j_join_wait */
/* don't batch when syncing the commit or flushing the whole trans */
- if (!(journal->j_must_wait > 0) && !(atomic_read(&(journal->j_jlock)))
+ if (!(journal->j_must_wait > 0) && !(atomic_read(&journal->j_jlock))
&& !flush && !commit_now && (journal->j_len < journal->j_max_batch)
&& journal->j_len_alloc < journal->j_max_batch
&& journal->j_cnode_free > (journal->j_trans_max * 3)) {
}
/*
-** Does all the work that makes deleting blocks safe.
-** when deleting a block mark BH_JNew, just remove it from the current transaction, clean it's buffer_head and move on.
-**
-** otherwise:
-** set a bit for the block in the journal bitmap. That will prevent it from being allocated for unformatted nodes
-** before this transaction has finished.
-**
-** mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers. That will prevent any old transactions with
-** this block from trying to flush to the real location. Since we aren't removing the cnode from the journal_list_hash,
-** the block can't be reallocated yet.
-**
-** Then remove it from the current transaction, decrementing any counters and filing it on the clean list.
-*/
+ * Does all the work that makes deleting blocks safe.
+ * when deleting a block mark BH_JNew, just remove it from the current
+ * transaction, clean it's buffer_head and move on.
+ *
+ * otherwise:
+ * set a bit for the block in the journal bitmap. That will prevent it from
+ * being allocated for unformatted nodes before this transaction has finished.
+ *
+ * mark any cnodes for this block as BLOCK_FREED, and clear their bh pointers.
+ * That will prevent any old transactions with this block from trying to flush
+ * to the real location. Since we aren't removing the cnode from the
+ * journal_list_hash, *the block can't be reallocated yet.
+ *
+ * Then remove it from the current transaction, decrementing any counters and
+ * filing it on the clean list.
+ */
int journal_mark_freed(struct reiserfs_transaction_handle *th,
struct super_block *sb, b_blocknr_t blocknr)
{
reiserfs_clean_and_file_buffer(bh);
cleaned = remove_from_transaction(sb, blocknr, cleaned);
} else {
- /* set the bit for this block in the journal bitmap for this transaction */
+ /*
+ * set the bit for this block in the journal bitmap
+ * for this transaction
+ */
jb = journal->j_current_jl->j_list_bitmap;
if (!jb) {
reiserfs_panic(sb, "journal-1702",
}
cleaned = remove_from_transaction(sb, blocknr, cleaned);
- /* find all older transactions with this block, make sure they don't try to write it out */
+ /*
+ * find all older transactions with this block,
+ * make sure they don't try to write it out
+ */
cn = get_journal_hash_dev(sb, journal->j_list_hash_table,
blocknr);
while (cn) {
if (sb == cn->sb && blocknr == cn->blocknr) {
set_bit(BLOCK_FREED, &cn->state);
if (cn->bh) {
+ /*
+ * remove_from_transaction will brelse
+ * the buffer if it was in the current
+ * trans
+ */
if (!cleaned) {
- /* remove_from_transaction will brelse the buffer if it was
- ** in the current trans
- */
clear_buffer_journal_dirty(cn->
bh);
clear_buffer_dirty(cn->bh);
cleaned = 1;
put_bh(cn->bh);
if (atomic_read
- (&(cn->bh->b_count)) < 0) {
+ (&cn->bh->b_count) < 0) {
reiserfs_warning(sb,
"journal-2138",
"cn->bh->b_count < 0");
}
}
- if (cn->jlist) { /* since we are clearing the bh, we MUST dec nonzerolen */
- atomic_dec(&
- (cn->jlist->
- j_nonzerolen));
+ /*
+ * since we are clearing the bh,
+ * we MUST dec nonzerolen
+ */
+ if (cn->jlist) {
+ atomic_dec(&cn->jlist->
+ j_nonzerolen);
}
cn->bh = NULL;
}
struct reiserfs_journal *journal = SB_JOURNAL(sb);
int ret = 0;
- /* is it from the current transaction, or from an unknown transaction? */
+ /*
+ * is it from the current transaction,
+ * or from an unknown transaction?
+ */
if (id == journal->j_trans_id) {
jl = journal->j_current_jl;
- /* try to let other writers come in and grow this transaction */
+ /*
+ * try to let other writers come in and
+ * grow this transaction
+ */
let_transaction_grow(sb, id);
if (journal->j_trans_id != id) {
goto flush_commit_only;
if (journal->j_trans_id != id) {
reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(&th, sb, SB_BUFFER_WITH_SB(sb));
- ret = journal_end(&th, sb, 1);
+ journal_mark_dirty(&th, SB_BUFFER_WITH_SB(sb));
+ ret = journal_end(&th);
goto flush_commit_only;
}
- ret = journal_end_sync(&th, sb, 1);
+ ret = journal_end_sync(&th);
if (!ret)
ret = 1;
} else {
- /* this gets tricky, we have to make sure the journal list in
+ /*
+ * this gets tricky, we have to make sure the journal list in
* the inode still exists. We know the list is still around
* if we've got a larger transaction id than the oldest list
*/
- flush_commit_only:
+flush_commit_only:
if (journal_list_still_alive(inode->i_sb, id)) {
/*
* we only set ret to 1 when we know for sure
unsigned int id = REISERFS_I(inode)->i_trans_id;
struct reiserfs_journal_list *jl = REISERFS_I(inode)->i_jl;
- /* for the whole inode, assume unset id means it was
+ /*
+ * for the whole inode, assume unset id means it was
* changed in the current transaction. More conservative
*/
if (!id || !jl) {
extern struct tree_balance *cur_tb;
/*
-** before we can change a metadata block, we have to make sure it won't
-** be written to disk while we are altering it. So, we must:
-** clean it
-** wait on it.
-**
-*/
+ * before we can change a metadata block, we have to make sure it won't
+ * be written to disk while we are altering it. So, we must:
+ * clean it
+ * wait on it.
+ */
int reiserfs_prepare_for_journal(struct super_block *sb,
struct buffer_head *bh, int wait)
{
}
/*
-** long and ugly. If flush, will not return until all commit
-** blocks and all real buffers in the trans are on disk.
-** If no_async, won't return until all commit blocks are on disk.
-**
-** keep reading, there are comments as you go along
-**
-** If the journal is aborted, we just clean up. Things like flushing
-** journal lists, etc just won't happen.
-*/
-static int do_journal_end(struct reiserfs_transaction_handle *th,
- struct super_block *sb, unsigned long nblocks,
- int flags)
+ * long and ugly. If flush, will not return until all commit
+ * blocks and all real buffers in the trans are on disk.
+ * If no_async, won't return until all commit blocks are on disk.
+ *
+ * keep reading, there are comments as you go along
+ *
+ * If the journal is aborted, we just clean up. Things like flushing
+ * journal lists, etc just won't happen.
+ */
+static int do_journal_end(struct reiserfs_transaction_handle *th, int flags)
{
+ struct super_block *sb = th->t_super;
struct reiserfs_journal *journal = SB_JOURNAL(sb);
struct reiserfs_journal_cnode *cn, *next, *jl_cn;
struct reiserfs_journal_cnode *last_cn = NULL;
BUG_ON(th->t_refcount > 1);
BUG_ON(!th->t_trans_id);
+ BUG_ON(!th->t_super);
- /* protect flush_older_commits from doing mistakes if the
- transaction ID counter gets overflowed. */
+ /*
+ * protect flush_older_commits from doing mistakes if the
+ * transaction ID counter gets overflowed.
+ */
if (th->t_trans_id == ~0U)
flags |= FLUSH_ALL | COMMIT_NOW | WAIT;
flush = flags & FLUSH_ALL;
if (journal->j_len == 0) {
reiserfs_prepare_for_journal(sb, SB_BUFFER_WITH_SB(sb),
1);
- journal_mark_dirty(th, sb, SB_BUFFER_WITH_SB(sb));
+ journal_mark_dirty(th, SB_BUFFER_WITH_SB(sb));
}
lock_journal(sb);
wait_on_commit = 1;
}
- /* check_journal_end locks the journal, and unlocks if it does not return 1
- ** it tells us if we should continue with the journal_end, or just return
+ /*
+ * check_journal_end locks the journal, and unlocks if it does
+ * not return 1 it tells us if we should continue with the
+ * journal_end, or just return
*/
- if (!check_journal_end(th, sb, nblocks, flags)) {
+ if (!check_journal_end(th, flags)) {
reiserfs_schedule_old_flush(sb);
wake_queued_writers(sb);
reiserfs_async_progress_wait(sb);
}
/*
- ** j must wait means we have to flush the log blocks, and the real blocks for
- ** this transaction
+ * j must wait means we have to flush the log blocks, and the
+ * real blocks for this transaction
*/
if (journal->j_must_wait > 0) {
flush = 1;
}
#ifdef REISERFS_PREALLOCATE
- /* quota ops might need to nest, setup the journal_info pointer for them
- * and raise the refcount so that it is > 0. */
+ /*
+ * quota ops might need to nest, setup the journal_info pointer
+ * for them and raise the refcount so that it is > 0.
+ */
current->journal_info = th;
th->t_refcount++;
- reiserfs_discard_all_prealloc(th); /* it should not involve new blocks into
- * the transaction */
+
+ /* it should not involve new blocks into the transaction */
+ reiserfs_discard_all_prealloc(th);
+
th->t_refcount--;
current->journal_info = th->t_handle_save;
#endif
memcpy(get_journal_desc_magic(d_bh), JOURNAL_DESC_MAGIC, 8);
set_desc_trans_id(desc, journal->j_trans_id);
- /* setup commit block. Don't write (keep it clean too) this one until after everyone else is written */
+ /*
+ * setup commit block. Don't write (keep it clean too) this one
+ * until after everyone else is written
+ */
c_bh = journal_getblk(sb, SB_ONDISK_JOURNAL_1st_BLOCK(sb) +
((journal->j_start + journal->j_len +
1) % SB_ONDISK_JOURNAL_SIZE(sb)));
/* init this journal list */
jl = journal->j_current_jl;
- /* we lock the commit before doing anything because
+ /*
+ * we lock the commit before doing anything because
* we want to make sure nobody tries to run flush_commit_list until
* the new transaction is fully setup, and we've already flushed the
* ordered bh list
atomic_set(&jl->j_commit_left, journal->j_len + 2);
jl->j_realblock = NULL;
- /* The ENTIRE FOR LOOP MUST not cause schedule to occur.
- ** for each real block, add it to the journal list hash,
- ** copy into real block index array in the commit or desc block
+ /*
+ * The ENTIRE FOR LOOP MUST not cause schedule to occur.
+ * for each real block, add it to the journal list hash,
+ * copy into real block index array in the commit or desc block
*/
trans_half = journal_trans_half(sb->s_blocksize);
for (i = 0, cn = journal->j_first; cn; cn = cn->next, i++) {
last_cn->next = jl_cn;
}
last_cn = jl_cn;
- /* make sure the block we are trying to log is not a block
- of journal or reserved area */
-
+ /*
+ * make sure the block we are trying to log
+ * is not a block of journal or reserved area
+ */
if (is_block_in_log_or_reserved_area
(sb, cn->bh->b_blocknr)) {
reiserfs_panic(sb, "journal-2332",
set_desc_trans_id(desc, journal->j_trans_id);
set_commit_trans_len(commit, journal->j_len);
- /* special check in case all buffers in the journal were marked for not logging */
+ /*
+ * special check in case all buffers in the journal
+ * were marked for not logging
+ */
BUG_ON(journal->j_len == 0);
- /* we're about to dirty all the log blocks, mark the description block
+ /*
+ * we're about to dirty all the log blocks, mark the description block
* dirty now too. Don't mark the commit block dirty until all the
* others are on disk
*/
mark_buffer_dirty(d_bh);
- /* first data block is j_start + 1, so add one to cur_write_start wherever you use it */
+ /*
+ * first data block is j_start + 1, so add one to
+ * cur_write_start wherever you use it
+ */
cur_write_start = journal->j_start;
cn = journal->j_first;
- jindex = 1; /* start at one so we don't get the desc again */
+ jindex = 1; /* start at one so we don't get the desc again */
while (cn) {
clear_buffer_journal_new(cn->bh);
/* copy all the real blocks into log area. dirty log blocks */
set_buffer_journal_dirty(cn->bh);
clear_buffer_journaled(cn->bh);
} else {
- /* JDirty cleared sometime during transaction. don't log this one */
+ /*
+ * JDirty cleared sometime during transaction.
+ * don't log this one
+ */
reiserfs_warning(sb, "journal-2048",
"BAD, buffer in journal hash, "
"but not JDirty!");
reiserfs_cond_resched(sb);
}
- /* we are done with both the c_bh and d_bh, but
- ** c_bh must be written after all other commit blocks,
- ** so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
+ /*
+ * we are done with both the c_bh and d_bh, but
+ * c_bh must be written after all other commit blocks,
+ * so we dirty/relse c_bh in flush_commit_list, with commit_left <= 1.
*/
journal->j_current_jl = alloc_journal_list(sb);
journal->j_start =
(journal->j_start + journal->j_len +
2) % SB_ONDISK_JOURNAL_SIZE(sb);
- atomic_set(&(journal->j_wcount), 0);
+ atomic_set(&journal->j_wcount, 0);
journal->j_bcount = 0;
journal->j_last = NULL;
journal->j_first = NULL;
journal->j_next_async_flush = 0;
init_journal_hash(sb);
- // make sure reiserfs_add_jh sees the new current_jl before we
- // write out the tails
+ /*
+ * make sure reiserfs_add_jh sees the new current_jl before we
+ * write out the tails
+ */
smp_mb();
- /* tail conversion targets have to hit the disk before we end the
+ /*
+ * tail conversion targets have to hit the disk before we end the
* transaction. Otherwise a later transaction might repack the tail
- * before this transaction commits, leaving the data block unflushed and
- * clean, if we crash before the later transaction commits, the data block
- * is lost.
+ * before this transaction commits, leaving the data block unflushed
+ * and clean, if we crash before the later transaction commits, the
+ * data block is lost.
*/
if (!list_empty(&jl->j_tail_bh_list)) {
depth = reiserfs_write_unlock_nested(sb);
BUG_ON(!list_empty(&jl->j_tail_bh_list));
mutex_unlock(&jl->j_commit_mutex);
- /* honor the flush wishes from the caller, simple commits can
- ** be done outside the journal lock, they are done below
- **
- ** if we don't flush the commit list right now, we put it into
- ** the work queue so the people waiting on the async progress work
- ** queue don't wait for this proc to flush journal lists and such.
+ /*
+ * honor the flush wishes from the caller, simple commits can
+ * be done outside the journal lock, they are done below
+ *
+ * if we don't flush the commit list right now, we put it into
+ * the work queue so the people waiting on the async progress work
+ * queue don't wait for this proc to flush journal lists and such.
*/
if (flush) {
flush_commit_list(sb, jl, 1);
queue_delayed_work(REISERFS_SB(sb)->commit_wq,
&journal->j_work, HZ / 10);
- /* if the next transaction has any chance of wrapping, flush
- ** transactions that might get overwritten. If any journal lists are very
- ** old flush them as well.
+ /*
+ * if the next transaction has any chance of wrapping, flush
+ * transactions that might get overwritten. If any journal lists
+ * are very old flush them as well.
*/
- first_jl:
+first_jl:
list_for_each_safe(entry, safe, &journal->j_journal_list) {
temp_jl = JOURNAL_LIST_ENTRY(entry);
if (journal->j_start <= temp_jl->j_start) {
} else if ((journal->j_start +
journal->j_trans_max + 1) <
SB_ONDISK_JOURNAL_SIZE(sb)) {
- /* if we don't cross into the next transaction and we don't
- * wrap, there is no way we can overlap any later transactions
+ /*
+ * if we don't cross into the next
+ * transaction and we don't wrap, there is
+ * no way we can overlap any later transactions
* break now
*/
break;
flush_used_journal_lists(sb, temp_jl);
goto first_jl;
} else {
- /* we don't overlap anything from out start to the end of the
- * log, and our wrapped portion doesn't overlap anything at
- * the start of the log. We can break
- */
+ /*
+ * we don't overlap anything from out start
+ * to the end of the log, and our wrapped
+ * portion doesn't overlap anything at
+ * the start of the log. We can break
+ */
break;
}
}
"could not get a list bitmap");
}
- atomic_set(&(journal->j_jlock), 0);
+ atomic_set(&journal->j_jlock, 0);
unlock_journal(sb);
/* wake up any body waiting to join. */
clear_bit(J_WRITERS_QUEUED, &journal->j_state);
- wake_up(&(journal->j_join_wait));
+ wake_up(&journal->j_join_wait);
if (!flush && wait_on_commit &&
journal_list_still_alive(sb, commit_trans_id)) {
flush_commit_list(sb, jl, 1);
}
- out:
+out:
reiserfs_check_lock_depth(sb, "journal end2");
memset(th, 0, sizeof(*th));
- /* Re-set th->t_super, so we can properly keep track of how many
+ /*
+ * Re-set th->t_super, so we can properly keep track of how many
* persistent transactions there are. We need to do this so if this
- * call is part of a failed restart_transaction, we can free it later */
+ * call is part of a failed restart_transaction, we can free it later
+ */
th->t_super = sb;
return journal->j_errno;
projects / firefly-linux-kernel-4.4.55.git / blobdiff