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OpenCloudOS-Kernel/fs/gfs2/meta_io.h

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[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
[GFS2] Update copyright date to 2006 Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-19 03:09:15 +08:00
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
[GFS2] Update copyright, tidy up incore.h As per comments from Jan Engelhardt <jengelh@linux01.gwdg.de> this updates the copyright message to say "version" in full rather than "v.2". Also incore.h has been updated to remove forward structure declarations which are not required. The gfs2_quota_lvb structure has now had endianess annotations added to it. Also quota.c has been updated so that we now store the lvb data locally in endian independant format to avoid needing a structure in host endianess too. As a result the endianess conversions are done as required at various points and thus the conversion routines in lvb.[ch] are no longer required. I've moved the one remaining constant in lvb.h thats used into lm.h and removed the unused lvb.[ch]. I have not changed the HIF_ constants. That is left to a later patch which I hope will unify the gh_flags and gh_iflags fields of the struct gfs2_holder. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-01 23:05:15 +08:00
* of the GNU General Public License version 2.
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
*/
#ifndef __DIO_DOT_H__
#define __DIO_DOT_H__
[GFS2] Make headers compile on their own As per Jan Engelhardt's comments, this should make all the headers compile on their own by including and/or declaring structures early. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-05 22:39:21 +08:00
#include <linux/buffer_head.h>
#include <linux/string.h>
#include "incore.h"
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
static inline void gfs2_buffer_clear(struct buffer_head *bh)
{
memset(bh->b_data, 0, bh->b_size);
}
static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
{
[GFS2] Tidy up in various files Tidy up some files and remove an unused routine in meta_io.h. Also added a bit of extra debugging in meta_io.h. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-01 03:42:17 +08:00
BUG_ON(head > bh->b_size);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
memset(bh->b_data + head, 0, bh->b_size - head);
}
static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
int to_head,
struct buffer_head *from_bh,
int from_head)
{
[GFS2] Tidy up in various files Tidy up some files and remove an unused routine in meta_io.h. Also added a bit of extra debugging in meta_io.h. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-01 03:42:17 +08:00
BUG_ON(from_head < to_head);
memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
from_bh->b_size - from_head);
memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
[GFS2] Tidy up in various files Tidy up some files and remove an unused routine in meta_io.h. Also added a bit of extra debugging in meta_io.h. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-01 03:42:17 +08:00
0, from_head - to_head);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
}
GFS2: Metadata address space clean up Since the start of GFS2, an "extra" inode has been used to store the metadata belonging to each inode. The only reason for using this inode was to have an extra address space, the other fields were unused. This means that the memory usage was rather inefficient. The reason for keeping each inode's metadata in a separate address space is that when glocks are requested on remote nodes, we need to be able to efficiently locate the data and metadata which relating to that glock (inode) in order to sync or sync and invalidate it (depending on the remotely requested lock mode). This patch adds a new type of glock, which has in addition to its normal fields, has an address space. This applies to all inode and rgrp glocks (but to no other glock types which remain as before). As a result, we no longer need to have the second inode. This results in three major improvements: 1. A saving of approx 25% of memory used in caching inodes 2. A removal of the circular dependency between inodes and glocks 3. No confusion between "normal" and "metadata" inodes in super.c Although the first of these is the more immediately apparent, the second is just as important as it now enables a number of clean ups at umount time. Those will be the subject of future patches. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-12-08 20:12:13 +08:00
extern const struct address_space_operations gfs2_meta_aops;
static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
{
struct inode *inode = mapping->host;
if (mapping->a_ops == &gfs2_meta_aops)
return (((struct gfs2_glock *)mapping) - 1)->gl_sbd;
else
return inode->i_sb->s_fs_info;
}
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] Tidy up meta_io code Fix a bug in the directory reading code, where we might have dereferenced a NULL pointer in case of OOM. Updated the directory code to use the new & improved version of gfs2_meta_ra() which now returns the first block that was being read. Previously it was releasing it requiring following code to grab the block again at each point it was called. Also turned off readahead on directory lookups since we are reading a hash table, and therefore reading the entries in order is very unlikely. Readahead is still used for all other calls to the directory reading function (e.g. when growing the hash table). Removed the DIO_START constant. Everywhere this was used, it was used to unconditionally start i/o aside from a couple of places, so I've removed it and made the couple of exceptions to this rule into separate functions. Also hunted through the other DIO flags and removed them as arguments from functions which were always called with the same combination of arguments. Updated gfs2_meta_indirect_buffer to be a bit more efficient and hopefully also be a bit easier to read. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-22 05:05:23 +08:00
void gfs2_meta_sync(struct gfs2_glock *gl);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] Change all types to uX style This makes all fixed size types have consistent names. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-05 00:49:07 +08:00
struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno,
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
int flags, struct buffer_head **bhp);
[GFS2] Tidy up meta_io code Fix a bug in the directory reading code, where we might have dereferenced a NULL pointer in case of OOM. Updated the directory code to use the new & improved version of gfs2_meta_ra() which now returns the first block that was being read. Previously it was releasing it requiring following code to grab the block again at each point it was called. Also turned off readahead on directory lookups since we are reading a hash table, and therefore reading the entries in order is very unlikely. Readahead is still used for all other calls to the directory reading function (e.g. when growing the hash table). Removed the DIO_START constant. Everywhere this was used, it was used to unconditionally start i/o aside from a couple of places, so I've removed it and made the couple of exceptions to this rule into separate functions. Also hunted through the other DIO flags and removed them as arguments from functions which were always called with the same combination of arguments. Updated gfs2_meta_indirect_buffer to be a bit more efficient and hopefully also be a bit easier to read. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-22 05:05:23 +08:00
int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
[GFS2] Clean up the glock core This patch implements a number of cleanups to the core of the GFS2 glock code. As a result a lot of code is removed. It looks like a really big change, but actually a large part of this patch is either removing or moving existing code. There are some new bits too though, such as the new run_queue() function which is considerably streamlined. Highlights of this patch include: o Fixes a cluster coherency bug during SH -> EX lock conversions o Removes the "glmutex" code in favour of a single bit lock o Removes the ->go_xmote_bh() for inodes since it was duplicating ->go_lock() o We now only use the ->lm_lock() function for both locks and unlocks (i.e. unlock is a lock with target mode LM_ST_UNLOCKED) o The fast path is considerably shortly, giving performance gains especially with lock_nolock o The glock_workqueue is now used for all the callbacks from the DLM which allows us to simplify the lock_dlm module (see following patch) o The way is now open to make further changes such as eliminating the two threads (gfs2_glockd and gfs2_scand) in favour of a more efficient scheme. This patch has undergone extensive testing with various test suites so it should be pretty stable by now. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Bob Peterson <rpeterso@redhat.com>
2008-05-22 00:03:22 +08:00
struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] 80 Column audit of GFS2 Requested by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-28 01:00:42 +08:00
void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh,
int meta);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] Clean up journaled data writing This patch cleans up the code for writing journaled data into the log. It also removes the need to allocate a small "tag" structure for each block written into the log. Instead we just keep count of the outstanding I/O so that we can be sure that its all been written at the correct time. Another result of this patch is that a number of ll_rw_block() calls have become submit_bh() calls, closing some races at the same time. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-09-17 17:59:52 +08:00
void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr,
int meta);
[GFS2] Change all types to uX style This makes all fixed size types have consistent names. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-05 00:49:07 +08:00
void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] Change all types to uX style This makes all fixed size types have consistent names. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-05 00:49:07 +08:00
int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
int new, struct buffer_head **bhp);
static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
struct buffer_head **bhp)
{
[GFS2] Clean up inode number handling This patch cleans up the inode number handling code. The main difference is that instead of looking up the inodes using a struct gfs2_inum_host we now use just the no_addr member of this structure. The tests relating to no_formal_ino can then be done by the calling code. This has advantages in that we want to do different things in different code paths if the no_formal_ino doesn't match. In the NFS patch we want to return -ESTALE, but in the ->lookup() path, its a bug in the fs if the no_formal_ino doesn't match and thus we can withdraw in this case. In order to later fix bz #201012, we need to be able to look up an inode without knowing no_formal_ino, as the only information that is known to us is the on-disk location of the inode in question. This patch will also help us to fix bz #236099 at a later date by cleaning up a lot of the code in that area. There are no user visible changes as a result of this patch and there are no changes to the on-disk format either. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-05-15 22:37:50 +08:00
return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, 0, bhp);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
}
[GFS2] Tidy up meta_io code Fix a bug in the directory reading code, where we might have dereferenced a NULL pointer in case of OOM. Updated the directory code to use the new & improved version of gfs2_meta_ra() which now returns the first block that was being read. Previously it was releasing it requiring following code to grab the block again at each point it was called. Also turned off readahead on directory lookups since we are reading a hash table, and therefore reading the entries in order is very unlikely. Readahead is still used for all other calls to the directory reading function (e.g. when growing the hash table). Removed the DIO_START constant. Everywhere this was used, it was used to unconditionally start i/o aside from a couple of places, so I've removed it and made the couple of exceptions to this rule into separate functions. Also hunted through the other DIO flags and removed them as arguments from functions which were always called with the same combination of arguments. Updated gfs2_meta_indirect_buffer to be a bit more efficient and hopefully also be a bit easier to read. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-22 05:05:23 +08:00
struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
[GFS2] Move logging code into log.c (mostly) This moves the logging code from meta_io.c into log.c and glops.c. As a result the routines can now be static and all the logging code is together in log.c, leaving meta_io.c with just metadata i/o code in it. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-03 23:10:41 +08:00
#define buffer_busy(bh) \
((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned)))
[GFS2] The core of GFS2 This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-17 00:50:04 +08:00
#endif /* __DIO_DOT_H__ */