[PATCH] JFS: Support page sizes greater than 4K
jfs has never worked on architecutures where the page size was not 4K.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 7bc9066..6c04f5e 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -175,31 +175,22 @@
{
s64 lblock64 = lblock;
int rc = 0;
- int take_locks;
xad_t xad;
s64 xaddr;
int xflag;
s32 xlen;
/*
- * If this is a special inode (imap, dmap)
- * the lock should already be taken
- */
- take_locks = (JFS_IP(ip)->fileset != AGGREGATE_I);
-
- /*
* Take appropriate lock on inode
*/
- if (take_locks) {
- if (create)
- IWRITE_LOCK(ip);
- else
- IREAD_LOCK(ip);
- }
+ if (create)
+ IWRITE_LOCK(ip);
+ else
+ IREAD_LOCK(ip);
if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
- (xtLookup(ip, lblock64, max_blocks, &xflag, &xaddr, &xlen, 0)
- == 0) && xlen) {
+ (!xtLookup(ip, lblock64, max_blocks, &xflag, &xaddr, &xlen, 0)) &&
+ xlen) {
if (xflag & XAD_NOTRECORDED) {
if (!create)
/*
@@ -258,12 +249,10 @@
/*
* Release lock on inode
*/
- if (take_locks) {
- if (create)
- IWRITE_UNLOCK(ip);
- else
- IREAD_UNLOCK(ip);
- }
+ if (create)
+ IWRITE_UNLOCK(ip);
+ else
+ IREAD_UNLOCK(ip);
return rc;
}
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index d86e467..69007fd 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -471,6 +471,7 @@
struct metapage *mp;
struct jfs_log *log;
int lsn, difft, diffp;
+ unsigned long flags;
/* the blocks better be within the mapsize. */
if (blkno + nblocks > bmp->db_mapsize) {
@@ -504,6 +505,7 @@
0);
if (mp == NULL)
return -EIO;
+ metapage_wait_for_io(mp);
}
dp = (struct dmap *) mp->data;
@@ -578,34 +580,32 @@
if (mp->lsn != 0) {
/* inherit older/smaller lsn */
logdiff(diffp, mp->lsn, log);
+ LOGSYNC_LOCK(log, flags);
if (difft < diffp) {
mp->lsn = lsn;
/* move bp after tblock in logsync list */
- LOGSYNC_LOCK(log);
list_move(&mp->synclist, &tblk->synclist);
- LOGSYNC_UNLOCK(log);
}
/* inherit younger/larger clsn */
- LOGSYNC_LOCK(log);
logdiff(difft, tblk->clsn, log);
logdiff(diffp, mp->clsn, log);
if (difft > diffp)
mp->clsn = tblk->clsn;
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
} else {
mp->log = log;
mp->lsn = lsn;
/* insert bp after tblock in logsync list */
- LOGSYNC_LOCK(log);
+ LOGSYNC_LOCK(log, flags);
log->count++;
list_add(&mp->synclist, &tblk->synclist);
mp->clsn = tblk->clsn;
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
}
}
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 6a0aa7e..7acff2c 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -502,7 +502,7 @@
}
- ip->i_mapping->a_ops = &jfs_aops;
+ ip->i_mapping->a_ops = &jfs_metapage_aops;
mapping_set_gfp_mask(ip->i_mapping, GFP_NOFS);
/* Allocations to metadata inodes should not affect quotas */
@@ -2791,6 +2791,7 @@
u32 mask;
struct jfs_log *log;
int lsn, difft, diffp;
+ unsigned long flags;
imap = JFS_IP(ipimap)->i_imap;
/* get the iag number containing the inode */
@@ -2807,6 +2808,7 @@
IREAD_UNLOCK(ipimap);
if (rc)
return (rc);
+ metapage_wait_for_io(mp);
iagp = (struct iag *) mp->data;
/* get the inode number and extent number of the inode within
* the iag and the inode number within the extent.
@@ -2870,30 +2872,28 @@
/* inherit older/smaller lsn */
logdiff(difft, lsn, log);
logdiff(diffp, mp->lsn, log);
+ LOGSYNC_LOCK(log, flags);
if (difft < diffp) {
mp->lsn = lsn;
/* move mp after tblock in logsync list */
- LOGSYNC_LOCK(log);
list_move(&mp->synclist, &tblk->synclist);
- LOGSYNC_UNLOCK(log);
}
/* inherit younger/larger clsn */
- LOGSYNC_LOCK(log);
assert(mp->clsn);
logdiff(difft, tblk->clsn, log);
logdiff(diffp, mp->clsn, log);
if (difft > diffp)
mp->clsn = tblk->clsn;
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
} else {
mp->log = log;
mp->lsn = lsn;
/* insert mp after tblock in logsync list */
- LOGSYNC_LOCK(log);
+ LOGSYNC_LOCK(log, flags);
log->count++;
list_add(&mp->synclist, &tblk->synclist);
mp->clsn = tblk->clsn;
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
}
write_metapage(mp);
return (0);
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index ebd77c1..c0fd7b3 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -165,6 +165,7 @@
/* Formerly in ipbmap */
struct bmap *bmap; /* incore bmap descriptor */
struct nls_table *nls_tab; /* current codepage */
+ struct inode *direct_inode; /* metadata inode */
uint state; /* mount/recovery state */
unsigned long flag; /* mount time flags */
uint p_state; /* state prior to going no integrity */
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index e0f867d..cfcdad3 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -234,6 +234,7 @@
int lsn;
int diffp, difft;
struct metapage *mp = NULL;
+ unsigned long flags;
jfs_info("lmLog: log:0x%p tblk:0x%p, lrd:0x%p tlck:0x%p",
log, tblk, lrd, tlck);
@@ -254,7 +255,7 @@
*/
lsn = log->lsn;
- LOGSYNC_LOCK(log);
+ LOGSYNC_LOCK(log, flags);
/*
* initialize page lsn if first log write of the page
@@ -310,7 +311,7 @@
}
}
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
/*
* write the log record
@@ -334,7 +335,6 @@
return lsn;
}
-
/*
* NAME: lmWriteRecord()
*
@@ -945,6 +945,15 @@
struct lrd lrd;
int lsn;
struct logsyncblk *lp;
+ struct jfs_sb_info *sbi;
+ unsigned long flags;
+
+ /* push dirty metapages out to disk */
+ list_for_each_entry(sbi, &log->sb_list, log_list) {
+ filemap_flush(sbi->ipbmap->i_mapping);
+ filemap_flush(sbi->ipimap->i_mapping);
+ filemap_flush(sbi->direct_inode->i_mapping);
+ }
/*
* forward syncpt
@@ -954,10 +963,7 @@
*/
if (log->sync == log->syncpt) {
- LOGSYNC_LOCK(log);
- /* ToDo: push dirty metapages out to disk */
-// bmLogSync(log);
-
+ LOGSYNC_LOCK(log, flags);
if (list_empty(&log->synclist))
log->sync = log->lsn;
else {
@@ -965,7 +971,7 @@
struct logsyncblk, synclist);
log->sync = lp->lsn;
}
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
}
@@ -974,27 +980,6 @@
* reset syncpt = sync
*/
if (log->sync != log->syncpt) {
- struct jfs_sb_info *sbi;
-
- /*
- * We need to make sure all of the "written" metapages
- * actually make it to disk
- */
- list_for_each_entry(sbi, &log->sb_list, log_list) {
- if (sbi->flag & JFS_NOINTEGRITY)
- continue;
- filemap_fdatawrite(sbi->ipbmap->i_mapping);
- filemap_fdatawrite(sbi->ipimap->i_mapping);
- filemap_fdatawrite(sbi->sb->s_bdev->bd_inode->i_mapping);
- }
- list_for_each_entry(sbi, &log->sb_list, log_list) {
- if (sbi->flag & JFS_NOINTEGRITY)
- continue;
- filemap_fdatawait(sbi->ipbmap->i_mapping);
- filemap_fdatawait(sbi->ipimap->i_mapping);
- filemap_fdatawait(sbi->sb->s_bdev->bd_inode->i_mapping);
- }
-
lrd.logtid = 0;
lrd.backchain = 0;
lrd.type = cpu_to_le16(LOG_SYNCPT);
@@ -1547,6 +1532,7 @@
{
int i;
struct tblock *target = NULL;
+ struct jfs_sb_info *sbi;
/* jfs_write_inode may call us during read-only mount */
if (!log)
@@ -1608,12 +1594,18 @@
if (wait < 2)
return;
+ list_for_each_entry(sbi, &log->sb_list, log_list) {
+ filemap_fdatawrite(sbi->ipbmap->i_mapping);
+ filemap_fdatawrite(sbi->ipimap->i_mapping);
+ filemap_fdatawrite(sbi->direct_inode->i_mapping);
+ }
+
/*
* If there was recent activity, we may need to wait
* for the lazycommit thread to catch up
*/
if ((!list_empty(&log->cqueue)) || !list_empty(&log->synclist)) {
- for (i = 0; i < 800; i++) { /* Too much? */
+ for (i = 0; i < 200; i++) { /* Too much? */
msleep(250);
if (list_empty(&log->cqueue) &&
list_empty(&log->synclist))
@@ -1621,7 +1613,24 @@
}
}
assert(list_empty(&log->cqueue));
- assert(list_empty(&log->synclist));
+ if (!list_empty(&log->synclist)) {
+ struct logsyncblk *lp;
+
+ list_for_each_entry(lp, &log->synclist, synclist) {
+ if (lp->xflag & COMMIT_PAGE) {
+ struct metapage *mp = (struct metapage *)lp;
+ dump_mem("orphan metapage", lp,
+ sizeof(struct metapage));
+ dump_mem("page", mp->page, sizeof(struct page));
+ }
+ else
+ dump_mem("orphan tblock", lp,
+ sizeof(struct tblock));
+ }
+// current->state = TASK_INTERRUPTIBLE;
+// schedule();
+ }
+ //assert(list_empty(&log->synclist));
clear_bit(log_FLUSH, &log->flag);
}
diff --git a/fs/jfs/jfs_logmgr.h b/fs/jfs/jfs_logmgr.h
index f671466..f4c1210 100644
--- a/fs/jfs/jfs_logmgr.h
+++ b/fs/jfs/jfs_logmgr.h
@@ -490,8 +490,9 @@
*/
#define LOGSYNC_LOCK_INIT(log) spin_lock_init(&(log)->synclock)
-#define LOGSYNC_LOCK(log) spin_lock(&(log)->synclock)
-#define LOGSYNC_UNLOCK(log) spin_unlock(&(log)->synclock)
+#define LOGSYNC_LOCK(log, flags) spin_lock_irqsave(&(log)->synclock, flags)
+#define LOGSYNC_UNLOCK(log, flags) \
+ spin_unlock_irqrestore(&(log)->synclock, flags)
/* compute the difference in bytes of lsn from sync point */
#define logdiff(diff, lsn, log)\
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 4c0a3ac..41bf078 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) International Business Machines Corp., 2000-2003
+ * Copyright (C) International Business Machines Corp., 2000-2005
* Portions Copyright (C) Christoph Hellwig, 2001-2002
*
* This program is free software; you can redistribute it and/or modify
@@ -18,10 +18,11 @@
*/
#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/bio.h>
#include <linux/init.h>
#include <linux/buffer_head.h>
#include <linux/mempool.h>
-#include <linux/delay.h>
#include "jfs_incore.h"
#include "jfs_superblock.h"
#include "jfs_filsys.h"
@@ -29,8 +30,6 @@
#include "jfs_txnmgr.h"
#include "jfs_debug.h"
-static DEFINE_SPINLOCK(meta_lock);
-
#ifdef CONFIG_JFS_STATISTICS
static struct {
uint pagealloc; /* # of page allocations */
@@ -39,22 +38,8 @@
} mpStat;
#endif
-
-#define HASH_BITS 10 /* This makes hash_table 1 4K page */
-#define HASH_SIZE (1 << HASH_BITS)
-static struct metapage **hash_table = NULL;
-static unsigned long hash_order;
-
-
-static inline int metapage_locked(struct metapage *mp)
-{
- return test_bit(META_locked, &mp->flag);
-}
-
-static inline int trylock_metapage(struct metapage *mp)
-{
- return test_and_set_bit(META_locked, &mp->flag);
-}
+#define metapage_locked(mp) test_bit(META_locked, &(mp)->flag)
+#define trylock_metapage(mp) test_and_set_bit(META_locked, &(mp)->flag)
static inline void unlock_metapage(struct metapage *mp)
{
@@ -62,26 +47,26 @@
wake_up(&mp->wait);
}
-static void __lock_metapage(struct metapage *mp)
+static inline void __lock_metapage(struct metapage *mp)
{
DECLARE_WAITQUEUE(wait, current);
-
INCREMENT(mpStat.lockwait);
-
add_wait_queue_exclusive(&mp->wait, &wait);
do {
set_current_state(TASK_UNINTERRUPTIBLE);
if (metapage_locked(mp)) {
- spin_unlock(&meta_lock);
+ unlock_page(mp->page);
schedule();
- spin_lock(&meta_lock);
+ lock_page(mp->page);
}
} while (trylock_metapage(mp));
__set_current_state(TASK_RUNNING);
remove_wait_queue(&mp->wait, &wait);
}
-/* needs meta_lock */
+/*
+ * Must have mp->page locked
+ */
static inline void lock_metapage(struct metapage *mp)
{
if (trylock_metapage(mp))
@@ -92,6 +77,110 @@
static kmem_cache_t *metapage_cache;
static mempool_t *metapage_mempool;
+#define MPS_PER_PAGE (PAGE_CACHE_SIZE >> L2PSIZE)
+
+#if MPS_PER_PAGE > 1
+
+struct meta_anchor {
+ int mp_count;
+ atomic_t io_count;
+ struct metapage *mp[MPS_PER_PAGE];
+};
+#define mp_anchor(page) ((struct meta_anchor *)page->private)
+
+static inline struct metapage *page_to_mp(struct page *page, uint offset)
+{
+ if (!PagePrivate(page))
+ return NULL;
+ return mp_anchor(page)->mp[offset >> L2PSIZE];
+}
+
+static inline int insert_metapage(struct page *page, struct metapage *mp)
+{
+ struct meta_anchor *a;
+ int index;
+ int l2mp_blocks; /* log2 blocks per metapage */
+
+ if (PagePrivate(page))
+ a = mp_anchor(page);
+ else {
+ a = kmalloc(sizeof(struct meta_anchor), GFP_NOFS);
+ if (!a)
+ return -ENOMEM;
+ memset(a, 0, sizeof(struct meta_anchor));
+ page->private = (unsigned long)a;
+ SetPagePrivate(page);
+ kmap(page);
+ }
+
+ if (mp) {
+ l2mp_blocks = L2PSIZE - page->mapping->host->i_blkbits;
+ index = (mp->index >> l2mp_blocks) & (MPS_PER_PAGE - 1);
+ a->mp_count++;
+ a->mp[index] = mp;
+ }
+
+ return 0;
+}
+
+static inline void remove_metapage(struct page *page, struct metapage *mp)
+{
+ struct meta_anchor *a = mp_anchor(page);
+ int l2mp_blocks = L2PSIZE - page->mapping->host->i_blkbits;
+ int index;
+
+ index = (mp->index >> l2mp_blocks) & (MPS_PER_PAGE - 1);
+
+ BUG_ON(a->mp[index] != mp);
+
+ a->mp[index] = NULL;
+ if (--a->mp_count == 0) {
+ kfree(a);
+ page->private = 0;
+ ClearPagePrivate(page);
+ kunmap(page);
+ }
+}
+
+static inline void inc_io(struct page *page)
+{
+ atomic_inc(&mp_anchor(page)->io_count);
+}
+
+static inline void dec_io(struct page *page, void (*handler) (struct page *))
+{
+ if (atomic_dec_and_test(&mp_anchor(page)->io_count))
+ handler(page);
+}
+
+#else
+static inline struct metapage *page_to_mp(struct page *page, uint offset)
+{
+ return PagePrivate(page) ? (struct metapage *)page->private : NULL;
+}
+
+static inline int insert_metapage(struct page *page, struct metapage *mp)
+{
+ if (mp) {
+ page->private = (unsigned long)mp;
+ SetPagePrivate(page);
+ kmap(page);
+ }
+ return 0;
+}
+
+static inline void remove_metapage(struct page *page, struct metapage *mp)
+{
+ page->private = 0;
+ ClearPagePrivate(page);
+ kunmap(page);
+}
+
+#define inc_io(page) do {} while(0)
+#define dec_io(page, handler) handler(page)
+
+#endif
+
static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
{
struct metapage *mp = (struct metapage *)foo;
@@ -139,16 +228,6 @@
kmem_cache_destroy(metapage_cache);
return -ENOMEM;
}
- /*
- * Now the hash list
- */
- for (hash_order = 0;
- ((PAGE_SIZE << hash_order) / sizeof(void *)) < HASH_SIZE;
- hash_order++);
- hash_table =
- (struct metapage **) __get_free_pages(GFP_KERNEL, hash_order);
- assert(hash_table);
- memset(hash_table, 0, PAGE_SIZE << hash_order);
return 0;
}
@@ -159,73 +238,388 @@
kmem_cache_destroy(metapage_cache);
}
+static inline void drop_metapage(struct page *page, struct metapage *mp)
+{
+ if (mp->count || mp->nohomeok || test_bit(META_dirty, &mp->flag) ||
+ test_bit(META_io, &mp->flag))
+ return;
+ remove_metapage(page, mp);
+ INCREMENT(mpStat.pagefree);
+ free_metapage(mp);
+}
+
/*
- * Basically same hash as in pagemap.h, but using our hash table
+ * Metapage address space operations
*/
-static struct metapage **meta_hash(struct address_space *mapping,
- unsigned long index)
+
+static sector_t metapage_get_blocks(struct inode *inode, sector_t lblock,
+ unsigned int *len)
{
-#define i (((unsigned long)mapping)/ \
- (sizeof(struct inode) & ~(sizeof(struct inode) -1 )))
-#define s(x) ((x) + ((x) >> HASH_BITS))
- return hash_table + (s(i + index) & (HASH_SIZE - 1));
-#undef i
-#undef s
+ int rc = 0;
+ int xflag;
+ s64 xaddr;
+ sector_t file_blocks = (inode->i_size + inode->i_blksize - 1) >>
+ inode->i_blkbits;
+
+ if (lblock >= file_blocks)
+ return 0;
+ if (lblock + *len > file_blocks)
+ *len = file_blocks - lblock;
+
+ if (inode->i_ino) {
+ rc = xtLookup(inode, (s64)lblock, *len, &xflag, &xaddr, len, 0);
+ if ((rc == 0) && *len)
+ lblock = (sector_t)xaddr;
+ else
+ lblock = 0;
+ } /* else no mapping */
+
+ return lblock;
}
-static struct metapage *search_hash(struct metapage ** hash_ptr,
- struct address_space *mapping,
- unsigned long index)
+static void last_read_complete(struct page *page)
{
- struct metapage *ptr;
+ if (!PageError(page))
+ SetPageUptodate(page);
+ unlock_page(page);
+}
- for (ptr = *hash_ptr; ptr; ptr = ptr->hash_next) {
- if ((ptr->mapping == mapping) && (ptr->index == index))
- return ptr;
+static int metapage_read_end_io(struct bio *bio, unsigned int bytes_done,
+ int err)
+{
+ struct page *page = bio->bi_private;
+
+ if (bio->bi_size)
+ return 1;
+
+ if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
+ printk(KERN_ERR "metapage_read_end_io: I/O error\n");
+ SetPageError(page);
}
- return NULL;
+ dec_io(page, last_read_complete);
+ bio_put(bio);
+
+ return 0;
}
-static void add_to_hash(struct metapage * mp, struct metapage ** hash_ptr)
+static void remove_from_logsync(struct metapage *mp)
{
- if (*hash_ptr)
- (*hash_ptr)->hash_prev = mp;
+ struct jfs_log *log = mp->log;
+ unsigned long flags;
+/*
+ * This can race. Recheck that log hasn't been set to null, and after
+ * acquiring logsync lock, recheck lsn
+ */
+ if (!log)
+ return;
- mp->hash_prev = NULL;
- mp->hash_next = *hash_ptr;
- *hash_ptr = mp;
-}
-
-static void remove_from_hash(struct metapage * mp, struct metapage ** hash_ptr)
-{
- if (mp->hash_prev)
- mp->hash_prev->hash_next = mp->hash_next;
- else {
- assert(*hash_ptr == mp);
- *hash_ptr = mp->hash_next;
+ LOGSYNC_LOCK(log, flags);
+ if (mp->lsn) {
+ mp->log = NULL;
+ mp->lsn = 0;
+ mp->clsn = 0;
+ log->count--;
+ list_del(&mp->synclist);
}
-
- if (mp->hash_next)
- mp->hash_next->hash_prev = mp->hash_prev;
+ LOGSYNC_UNLOCK(log, flags);
}
+static void last_write_complete(struct page *page)
+{
+ struct metapage *mp;
+ unsigned int offset;
+
+ for (offset = 0; offset < PAGE_CACHE_SIZE; offset += PSIZE) {
+ mp = page_to_mp(page, offset);
+ if (mp && test_bit(META_io, &mp->flag)) {
+ if (mp->lsn)
+ remove_from_logsync(mp);
+ clear_bit(META_io, &mp->flag);
+ }
+ /*
+ * I'd like to call drop_metapage here, but I don't think it's
+ * safe unless I have the page locked
+ */
+ }
+ end_page_writeback(page);
+}
+
+static int metapage_write_end_io(struct bio *bio, unsigned int bytes_done,
+ int err)
+{
+ struct page *page = bio->bi_private;
+
+ BUG_ON(!PagePrivate(page));
+
+ if (bio->bi_size)
+ return 1;
+
+ if (! test_bit(BIO_UPTODATE, &bio->bi_flags)) {
+ printk(KERN_ERR "metapage_write_end_io: I/O error\n");
+ SetPageError(page);
+ }
+ dec_io(page, last_write_complete);
+ bio_put(bio);
+ return 0;
+}
+
+static int metapage_writepage(struct page *page, struct writeback_control *wbc)
+{
+ struct bio *bio = NULL;
+ unsigned int block_offset; /* block offset of mp within page */
+ struct inode *inode = page->mapping->host;
+ unsigned int blocks_per_mp = JFS_SBI(inode->i_sb)->nbperpage;
+ unsigned int len;
+ unsigned int xlen;
+ struct metapage *mp;
+ int redirty = 0;
+ sector_t lblock;
+ sector_t pblock;
+ sector_t next_block = 0;
+ sector_t page_start;
+ unsigned long bio_bytes = 0;
+ unsigned long bio_offset = 0;
+ unsigned int offset;
+
+ page_start = (sector_t)page->index <<
+ (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ BUG_ON(!PageLocked(page));
+ BUG_ON(PageWriteback(page));
+
+ for (offset = 0; offset < PAGE_CACHE_SIZE; offset += PSIZE) {
+ mp = page_to_mp(page, offset);
+
+ if (!mp || !test_bit(META_dirty, &mp->flag))
+ continue;
+
+ if (mp->nohomeok && !test_bit(META_forcewrite, &mp->flag)) {
+ redirty = 1;
+ continue;
+ }
+
+ clear_bit(META_dirty, &mp->flag);
+ block_offset = offset >> inode->i_blkbits;
+ lblock = page_start + block_offset;
+ if (bio) {
+ if (xlen && lblock == next_block) {
+ /* Contiguous, in memory & on disk */
+ len = min(xlen, blocks_per_mp);
+ xlen -= len;
+ bio_bytes += len << inode->i_blkbits;
+ set_bit(META_io, &mp->flag);
+ continue;
+ }
+ /* Not contiguous */
+ if (bio_add_page(bio, page, bio_bytes, bio_offset) <
+ bio_bytes)
+ goto add_failed;
+ /*
+ * Increment counter before submitting i/o to keep
+ * count from hitting zero before we're through
+ */
+ inc_io(page);
+ if (!bio->bi_size)
+ goto dump_bio;
+ submit_bio(WRITE, bio);
+ bio = NULL;
+ } else {
+ set_page_writeback(page);
+ inc_io(page);
+ }
+ xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits;
+ pblock = metapage_get_blocks(inode, lblock, &xlen);
+ if (!pblock) {
+ /* Need better error handling */
+ printk(KERN_ERR "JFS: metapage_get_blocks failed\n");
+ dec_io(page, last_write_complete);
+ continue;
+ }
+ set_bit(META_io, &mp->flag);
+ len = min(xlen, (uint) JFS_SBI(inode->i_sb)->nbperpage);
+
+ bio = bio_alloc(GFP_NOFS, 1);
+ bio->bi_bdev = inode->i_sb->s_bdev;
+ bio->bi_sector = pblock << (inode->i_blkbits - 9);
+ bio->bi_end_io = metapage_write_end_io;
+ bio->bi_private = page;
+
+ /* Don't call bio_add_page yet, we may add to this vec */
+ bio_offset = offset;
+ bio_bytes = len << inode->i_blkbits;
+
+ xlen -= len;
+ next_block = lblock + len;
+ }
+ if (bio) {
+ if (bio_add_page(bio, page, bio_bytes, bio_offset) < bio_bytes)
+ goto add_failed;
+ if (!bio->bi_size)
+ goto dump_bio;
+
+ submit_bio(WRITE, bio);
+ }
+ if (redirty)
+ redirty_page_for_writepage(wbc, page);
+
+ unlock_page(page);
+
+ return 0;
+add_failed:
+ /* We should never reach here, since we're only adding one vec */
+ printk(KERN_ERR "JFS: bio_add_page failed unexpectedly\n");
+ goto skip;
+dump_bio:
+ dump_mem("bio", bio, sizeof(*bio));
+skip:
+ bio_put(bio);
+ unlock_page(page);
+ dec_io(page, last_write_complete);
+
+ return -EIO;
+}
+
+static int metapage_readpage(struct file *fp, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ struct bio *bio = NULL;
+ unsigned int block_offset;
+ unsigned int blocks_per_page = PAGE_CACHE_SIZE >> inode->i_blkbits;
+ sector_t page_start; /* address of page in fs blocks */
+ sector_t pblock;
+ unsigned int xlen;
+ unsigned int len;
+ unsigned int offset;
+
+ BUG_ON(!PageLocked(page));
+ page_start = (sector_t)page->index <<
+ (PAGE_CACHE_SHIFT - inode->i_blkbits);
+
+ block_offset = 0;
+ while (block_offset < blocks_per_page) {
+ xlen = blocks_per_page - block_offset;
+ pblock = metapage_get_blocks(inode, page_start + block_offset,
+ &xlen);
+ if (pblock) {
+ if (!PagePrivate(page))
+ insert_metapage(page, NULL);
+ inc_io(page);
+ if (bio)
+ submit_bio(READ, bio);
+
+ bio = bio_alloc(GFP_NOFS, 1);
+ bio->bi_bdev = inode->i_sb->s_bdev;
+ bio->bi_sector = pblock << (inode->i_blkbits - 9);
+ bio->bi_end_io = metapage_read_end_io;
+ bio->bi_private = page;
+ len = xlen << inode->i_blkbits;
+ offset = block_offset << inode->i_blkbits;
+ if (bio_add_page(bio, page, len, offset) < len)
+ goto add_failed;
+ block_offset += xlen;
+ } else
+ block_offset++;
+ }
+ if (bio)
+ submit_bio(READ, bio);
+ else
+ unlock_page(page);
+
+ return 0;
+
+add_failed:
+ printk(KERN_ERR "JFS: bio_add_page failed unexpectedly\n");
+ bio_put(bio);
+ dec_io(page, last_read_complete);
+ return -EIO;
+}
+
+static int metapage_releasepage(struct page *page, int gfp_mask)
+{
+ struct metapage *mp;
+ int busy = 0;
+ unsigned int offset;
+
+ for (offset = 0; offset < PAGE_CACHE_SIZE; offset += PSIZE) {
+ mp = page_to_mp(page, offset);
+
+ if (!mp)
+ continue;
+
+ jfs_info("metapage_releasepage: mp = 0x%p", mp);
+ if (mp->count || mp->nohomeok) {
+ jfs_info("count = %ld, nohomeok = %d", mp->count,
+ mp->nohomeok);
+ busy = 1;
+ continue;
+ }
+ wait_on_page_writeback(page);
+ //WARN_ON(test_bit(META_dirty, &mp->flag));
+ if (test_bit(META_dirty, &mp->flag)) {
+ dump_mem("dirty mp in metapage_releasepage", mp,
+ sizeof(struct metapage));
+ dump_mem("page", page, sizeof(struct page));
+ dump_stack();
+ }
+ WARN_ON(mp->lsn);
+ if (mp->lsn)
+ remove_from_logsync(mp);
+ remove_metapage(page, mp);
+ INCREMENT(mpStat.pagefree);
+ free_metapage(mp);
+ }
+ if (busy)
+ return -1;
+
+ return 0;
+}
+
+static int metapage_invalidatepage(struct page *page, unsigned long offset)
+{
+ BUG_ON(offset);
+
+ if (PageWriteback(page))
+ return 0;
+
+ return metapage_releasepage(page, 0);
+}
+
+struct address_space_operations jfs_metapage_aops = {
+ .readpage = metapage_readpage,
+ .writepage = metapage_writepage,
+ .sync_page = block_sync_page,
+ .releasepage = metapage_releasepage,
+ .invalidatepage = metapage_invalidatepage,
+ .set_page_dirty = __set_page_dirty_nobuffers,
+};
+
struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
unsigned int size, int absolute,
unsigned long new)
{
- struct metapage **hash_ptr;
int l2BlocksPerPage;
int l2bsize;
struct address_space *mapping;
- struct metapage *mp;
+ struct metapage *mp = NULL;
+ struct page *page;
unsigned long page_index;
unsigned long page_offset;
- jfs_info("__get_metapage: inode = 0x%p, lblock = 0x%lx", inode, lblock);
+ jfs_info("__get_metapage: ino = %ld, lblock = 0x%lx, abs=%d",
+ inode->i_ino, lblock, absolute);
+ l2bsize = inode->i_blkbits;
+ l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
+ page_index = lblock >> l2BlocksPerPage;
+ page_offset = (lblock - (page_index << l2BlocksPerPage)) << l2bsize;
+ if ((page_offset + size) > PAGE_CACHE_SIZE) {
+ jfs_err("MetaData crosses page boundary!!");
+ jfs_err("lblock = %lx, size = %d", lblock, size);
+ dump_stack();
+ return NULL;
+ }
if (absolute)
- mapping = inode->i_sb->s_bdev->bd_inode->i_mapping;
+ mapping = JFS_SBI(inode->i_sb)->direct_inode->i_mapping;
else {
/*
* If an nfs client tries to read an inode that is larger
@@ -237,312 +631,212 @@
mapping = inode->i_mapping;
}
- hash_ptr = meta_hash(mapping, lblock);
-again:
- spin_lock(&meta_lock);
- mp = search_hash(hash_ptr, mapping, lblock);
+ if (new && (PSIZE == PAGE_CACHE_SIZE)) {
+ page = grab_cache_page(mapping, page_index);
+ if (!page) {
+ jfs_err("grab_cache_page failed!");
+ return NULL;
+ }
+ SetPageUptodate(page);
+ } else {
+ page = read_cache_page(mapping, page_index,
+ (filler_t *)mapping->a_ops->readpage, NULL);
+ if (IS_ERR(page)) {
+ jfs_err("read_cache_page failed!");
+ return NULL;
+ }
+ lock_page(page);
+ }
+
+ mp = page_to_mp(page, page_offset);
if (mp) {
- page_found:
- if (test_bit(META_stale, &mp->flag)) {
- spin_unlock(&meta_lock);
- msleep(1);
- goto again;
+ if (mp->logical_size != size) {
+ jfs_error(inode->i_sb,
+ "__get_metapage: mp->logical_size != size");
+ jfs_err("logical_size = %d, size = %d",
+ mp->logical_size, size);
+ dump_stack();
+ goto unlock;
}
mp->count++;
lock_metapage(mp);
- spin_unlock(&meta_lock);
if (test_bit(META_discard, &mp->flag)) {
if (!new) {
jfs_error(inode->i_sb,
"__get_metapage: using a "
"discarded metapage");
- release_metapage(mp);
- return NULL;
+ discard_metapage(mp);
+ goto unlock;
}
clear_bit(META_discard, &mp->flag);
}
- jfs_info("__get_metapage: found 0x%p, in hash", mp);
- if (mp->logical_size != size) {
- jfs_error(inode->i_sb,
- "__get_metapage: mp->logical_size != size");
- release_metapage(mp);
- return NULL;
- }
} else {
- l2bsize = inode->i_blkbits;
- l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
- page_index = lblock >> l2BlocksPerPage;
- page_offset = (lblock - (page_index << l2BlocksPerPage)) <<
- l2bsize;
- if ((page_offset + size) > PAGE_CACHE_SIZE) {
- spin_unlock(&meta_lock);
- jfs_err("MetaData crosses page boundary!!");
- return NULL;
- }
-
- /*
- * Locks held on aggregate inode pages are usually
- * not held long, and they are taken in critical code
- * paths (committing dirty inodes, txCommit thread)
- *
- * Attempt to get metapage without blocking, tapping into
- * reserves if necessary.
- */
- mp = NULL;
- if (JFS_IP(inode)->fileset == AGGREGATE_I) {
- mp = alloc_metapage(GFP_ATOMIC);
- if (!mp) {
- /*
- * mempool is supposed to protect us from
- * failing here. We will try a blocking
- * call, but a deadlock is possible here
- */
- printk(KERN_WARNING
- "__get_metapage: atomic call to mempool_alloc failed.\n");
- printk(KERN_WARNING
- "Will attempt blocking call\n");
- }
- }
- if (!mp) {
- struct metapage *mp2;
-
- spin_unlock(&meta_lock);
- mp = alloc_metapage(GFP_NOFS);
- spin_lock(&meta_lock);
-
- /* we dropped the meta_lock, we need to search the
- * hash again.
- */
- mp2 = search_hash(hash_ptr, mapping, lblock);
- if (mp2) {
- free_metapage(mp);
- mp = mp2;
- goto page_found;
- }
- }
+ INCREMENT(mpStat.pagealloc);
+ mp = alloc_metapage(GFP_NOFS);
+ mp->page = page;
mp->flag = 0;
- lock_metapage(mp);
- if (absolute)
- set_bit(META_absolute, &mp->flag);
mp->xflag = COMMIT_PAGE;
mp->count = 1;
- atomic_set(&mp->nohomeok,0);
- mp->mapping = mapping;
- mp->index = lblock;
- mp->page = NULL;
+ mp->nohomeok = 0;
mp->logical_size = size;
- add_to_hash(mp, hash_ptr);
- spin_unlock(&meta_lock);
-
- if (new) {
- jfs_info("__get_metapage: Calling grab_cache_page");
- mp->page = grab_cache_page(mapping, page_index);
- if (!mp->page) {
- jfs_err("grab_cache_page failed!");
- goto freeit;
- } else {
- INCREMENT(mpStat.pagealloc);
- unlock_page(mp->page);
- }
- } else {
- jfs_info("__get_metapage: Calling read_cache_page");
- mp->page = read_cache_page(mapping, lblock,
- (filler_t *)mapping->a_ops->readpage, NULL);
- if (IS_ERR(mp->page)) {
- jfs_err("read_cache_page failed!");
- goto freeit;
- } else
- INCREMENT(mpStat.pagealloc);
+ mp->data = page_address(page) + page_offset;
+ mp->index = lblock;
+ if (unlikely(insert_metapage(page, mp))) {
+ free_metapage(mp);
+ goto unlock;
}
- mp->data = kmap(mp->page) + page_offset;
+ lock_metapage(mp);
}
- if (new)
+ if (new) {
+ jfs_info("zeroing mp = 0x%p", mp);
memset(mp->data, 0, PSIZE);
+ }
- jfs_info("__get_metapage: returning = 0x%p", mp);
+ unlock_page(page);
+ jfs_info("__get_metapage: returning = 0x%p data = 0x%p", mp, mp->data);
return mp;
-freeit:
- spin_lock(&meta_lock);
- remove_from_hash(mp, hash_ptr);
- free_metapage(mp);
- spin_unlock(&meta_lock);
+unlock:
+ unlock_page(page);
return NULL;
}
-void hold_metapage(struct metapage * mp, int force)
+void grab_metapage(struct metapage * mp)
{
- spin_lock(&meta_lock);
-
- mp->count++;
-
- if (force) {
- ASSERT (!(test_bit(META_forced, &mp->flag)));
- if (trylock_metapage(mp))
- set_bit(META_forced, &mp->flag);
- } else
- lock_metapage(mp);
-
- spin_unlock(&meta_lock);
-}
-
-static void __write_metapage(struct metapage * mp)
-{
- int l2bsize = mp->mapping->host->i_blkbits;
- int l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
- unsigned long page_index;
- unsigned long page_offset;
- int rc;
-
- jfs_info("__write_metapage: mp = 0x%p", mp);
-
- page_index = mp->page->index;
- page_offset =
- (mp->index - (page_index << l2BlocksPerPage)) << l2bsize;
-
+ jfs_info("grab_metapage: mp = 0x%p", mp);
+ page_cache_get(mp->page);
lock_page(mp->page);
- rc = mp->mapping->a_ops->prepare_write(NULL, mp->page, page_offset,
- page_offset +
- mp->logical_size);
- if (rc) {
- jfs_err("prepare_write return %d!", rc);
- ClearPageUptodate(mp->page);
- unlock_page(mp->page);
- clear_bit(META_dirty, &mp->flag);
- return;
- }
- rc = mp->mapping->a_ops->commit_write(NULL, mp->page, page_offset,
- page_offset +
- mp->logical_size);
- if (rc) {
- jfs_err("commit_write returned %d", rc);
- }
-
+ mp->count++;
+ lock_metapage(mp);
unlock_page(mp->page);
- clear_bit(META_dirty, &mp->flag);
-
- jfs_info("__write_metapage done");
}
-static inline void sync_metapage(struct metapage *mp)
+void force_metapage(struct metapage *mp)
{
struct page *page = mp->page;
-
+ jfs_info("force_metapage: mp = 0x%p", mp);
+ set_bit(META_forcewrite, &mp->flag);
+ clear_bit(META_sync, &mp->flag);
page_cache_get(page);
lock_page(page);
-
- /* we're done with this page - no need to check for errors */
- if (page_has_buffers(page))
- write_one_page(page, 1);
- else
- unlock_page(page);
+ set_page_dirty(page);
+ write_one_page(page, 1);
+ clear_bit(META_forcewrite, &mp->flag);
page_cache_release(page);
}
+extern void hold_metapage(struct metapage *mp)
+{
+ lock_page(mp->page);
+}
+
+extern void put_metapage(struct metapage *mp)
+{
+ if (mp->count || mp->nohomeok) {
+ /* Someone else will release this */
+ unlock_page(mp->page);
+ return;
+ }
+ page_cache_get(mp->page);
+ mp->count++;
+ lock_metapage(mp);
+ unlock_page(mp->page);
+ release_metapage(mp);
+}
+
void release_metapage(struct metapage * mp)
{
- struct jfs_log *log;
-
+ struct page *page = mp->page;
jfs_info("release_metapage: mp = 0x%p, flag = 0x%lx", mp, mp->flag);
- spin_lock(&meta_lock);
- if (test_bit(META_forced, &mp->flag)) {
- clear_bit(META_forced, &mp->flag);
- mp->count--;
- spin_unlock(&meta_lock);
- return;
- }
+ BUG_ON(!page);
+
+ lock_page(page);
+ unlock_metapage(mp);
assert(mp->count);
- if (--mp->count || atomic_read(&mp->nohomeok)) {
- unlock_metapage(mp);
- spin_unlock(&meta_lock);
+ if (--mp->count || mp->nohomeok) {
+ unlock_page(page);
+ page_cache_release(page);
return;
}
- if (mp->page) {
- set_bit(META_stale, &mp->flag);
- spin_unlock(&meta_lock);
- kunmap(mp->page);
- mp->data = NULL;
- if (test_bit(META_dirty, &mp->flag))
- __write_metapage(mp);
+ if (test_bit(META_dirty, &mp->flag)) {
+ set_page_dirty(page);
if (test_bit(META_sync, &mp->flag)) {
- sync_metapage(mp);
clear_bit(META_sync, &mp->flag);
+ write_one_page(page, 1);
+ lock_page(page); /* write_one_page unlocks the page */
}
+ } else if (mp->lsn) /* discard_metapage doesn't remove it */
+ remove_from_logsync(mp);
- if (test_bit(META_discard, &mp->flag)) {
- lock_page(mp->page);
- block_invalidatepage(mp->page, 0);
- unlock_page(mp->page);
+#if MPS_PER_PAGE == 1
+ /*
+ * If we know this is the only thing in the page, we can throw
+ * the page out of the page cache. If pages are larger, we
+ * don't want to do this.
+ */
+
+ /* Retest mp->count since we may have released page lock */
+ if (test_bit(META_discard, &mp->flag) && !mp->count) {
+ clear_page_dirty(page);
+ ClearPageUptodate(page);
+#ifdef _NOT_YET
+ if (page->mapping) {
+ /* Remove from page cache and page cache reference */
+ remove_from_page_cache(page);
+ page_cache_release(page);
+ metapage_releasepage(page, 0);
}
-
- page_cache_release(mp->page);
- mp->page = NULL;
- INCREMENT(mpStat.pagefree);
- spin_lock(&meta_lock);
+#endif
}
-
- if (mp->lsn) {
- /*
- * Remove metapage from logsynclist.
- */
- log = mp->log;
- LOGSYNC_LOCK(log);
- mp->log = NULL;
- mp->lsn = 0;
- mp->clsn = 0;
- log->count--;
- list_del(&mp->synclist);
- LOGSYNC_UNLOCK(log);
- }
- remove_from_hash(mp, meta_hash(mp->mapping, mp->index));
- spin_unlock(&meta_lock);
-
- free_metapage(mp);
+#else
+ /* Try to keep metapages from using up too much memory */
+ drop_metapage(page, mp);
+#endif
+ unlock_page(page);
+ page_cache_release(page);
}
void __invalidate_metapages(struct inode *ip, s64 addr, int len)
{
- struct metapage **hash_ptr;
- unsigned long lblock;
+ sector_t lblock;
int l2BlocksPerPage = PAGE_CACHE_SHIFT - ip->i_blkbits;
+ int BlocksPerPage = 1 << l2BlocksPerPage;
/* All callers are interested in block device's mapping */
- struct address_space *mapping = ip->i_sb->s_bdev->bd_inode->i_mapping;
+ struct address_space *mapping =
+ JFS_SBI(ip->i_sb)->direct_inode->i_mapping;
struct metapage *mp;
struct page *page;
+ unsigned int offset;
/*
- * First, mark metapages to discard. They will eventually be
+ * Mark metapages to discard. They will eventually be
* released, but should not be written.
*/
- for (lblock = addr; lblock < addr + len;
- lblock += 1 << l2BlocksPerPage) {
- hash_ptr = meta_hash(mapping, lblock);
-again:
- spin_lock(&meta_lock);
- mp = search_hash(hash_ptr, mapping, lblock);
- if (mp) {
- if (test_bit(META_stale, &mp->flag)) {
- spin_unlock(&meta_lock);
- msleep(1);
- goto again;
- }
+ for (lblock = addr & ~(BlocksPerPage - 1); lblock < addr + len;
+ lblock += BlocksPerPage) {
+ page = find_lock_page(mapping, lblock >> l2BlocksPerPage);
+ if (!page)
+ continue;
+ for (offset = 0; offset < PAGE_CACHE_SIZE; offset += PSIZE) {
+ mp = page_to_mp(page, offset);
+ if (!mp)
+ continue;
+ if (mp->index < addr)
+ continue;
+ if (mp->index >= addr + len)
+ break;
clear_bit(META_dirty, &mp->flag);
set_bit(META_discard, &mp->flag);
- spin_unlock(&meta_lock);
- } else {
- spin_unlock(&meta_lock);
- page = find_lock_page(mapping, lblock>>l2BlocksPerPage);
- if (page) {
- block_invalidatepage(page, 0);
- unlock_page(page);
- page_cache_release(page);
- }
+ if (mp->lsn)
+ remove_from_logsync(mp);
}
+ unlock_page(page);
+ page_cache_release(page);
}
}
diff --git a/fs/jfs/jfs_metapage.h b/fs/jfs/jfs_metapage.h
index 0e58aba..991e9fb 100644
--- a/fs/jfs/jfs_metapage.h
+++ b/fs/jfs/jfs_metapage.h
@@ -33,38 +33,27 @@
unsigned long flag; /* See Below */
unsigned long count; /* Reference count */
void *data; /* Data pointer */
-
- /* list management stuff */
- struct metapage *hash_prev;
- struct metapage *hash_next; /* Also used for free list */
-
- /*
- * mapping & index become redundant, but we need these here to
- * add the metapage to the hash before we have the real page
- */
- struct address_space *mapping;
- unsigned long index;
+ sector_t index; /* block address of page */
wait_queue_head_t wait;
/* implementation */
struct page *page;
- unsigned long logical_size;
+ unsigned int logical_size;
/* Journal management */
int clsn;
- atomic_t nohomeok;
+ int nohomeok;
struct jfs_log *log;
};
/* metapage flag */
#define META_locked 0
-#define META_absolute 1
-#define META_free 2
-#define META_dirty 3
-#define META_sync 4
-#define META_discard 5
-#define META_forced 6
-#define META_stale 7
+#define META_free 1
+#define META_dirty 2
+#define META_sync 3
+#define META_discard 4
+#define META_forcewrite 5
+#define META_io 6
#define mark_metapage_dirty(mp) set_bit(META_dirty, &(mp)->flag)
@@ -80,7 +69,16 @@
__get_metapage(inode, lblock, size, absolute, TRUE)
extern void release_metapage(struct metapage *);
-extern void hold_metapage(struct metapage *, int);
+extern void grab_metapage(struct metapage *);
+extern void force_metapage(struct metapage *);
+
+/*
+ * hold_metapage and put_metapage are used in conjuction. The page lock
+ * is not dropped between the two, so no other threads can get or release
+ * the metapage
+ */
+extern void hold_metapage(struct metapage *);
+extern void put_metapage(struct metapage *);
static inline void write_metapage(struct metapage *mp)
{
@@ -101,6 +99,46 @@
release_metapage(mp);
}
+static inline void metapage_nohomeok(struct metapage *mp)
+{
+ struct page *page = mp->page;
+ lock_page(page);
+ if (!mp->nohomeok++) {
+ mark_metapage_dirty(mp);
+ page_cache_get(page);
+ wait_on_page_writeback(page);
+ }
+ unlock_page(page);
+}
+
+/*
+ * This serializes access to mp->lsn when metapages are added to logsynclist
+ * without setting nohomeok. i.e. updating imap & dmap
+ */
+static inline void metapage_wait_for_io(struct metapage *mp)
+{
+ if (test_bit(META_io, &mp->flag))
+ wait_on_page_writeback(mp->page);
+}
+
+/*
+ * This is called when already holding the metapage
+ */
+static inline void _metapage_homeok(struct metapage *mp)
+{
+ if (!--mp->nohomeok)
+ page_cache_release(mp->page);
+}
+
+static inline void metapage_homeok(struct metapage *mp)
+{
+ hold_metapage(mp);
+ _metapage_homeok(mp);
+ put_metapage(mp);
+}
+
+extern struct address_space_operations jfs_metapage_aops;
+
/*
* This routines invalidate all pages for an extent.
*/
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index c535ffd..032d111 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -285,11 +285,6 @@
*/
logMOUNT(sb);
- /*
- * Set page cache allocation policy
- */
- mapping_set_gfp_mask(sb->s_bdev->bd_inode->i_mapping, GFP_NOFS);
-
return rc;
}
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 98e16d9..bbc9c14 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -227,6 +227,7 @@
static void txLockFree(lid_t lid)
{
+ TxLock[lid].tid = 0;
TxLock[lid].next = TxAnchor.freelock;
TxAnchor.freelock = lid;
TxAnchor.tlocksInUse--;
@@ -633,8 +634,10 @@
/* is page locked by the requester transaction ? */
tlck = lid_to_tlock(lid);
- if ((xtid = tlck->tid) == tid)
+ if ((xtid = tlck->tid) == tid) {
+ TXN_UNLOCK();
goto grantLock;
+ }
/*
* is page locked by anonymous transaction/lock ?
@@ -649,6 +652,7 @@
*/
if (xtid == 0) {
tlck->tid = tid;
+ TXN_UNLOCK();
tblk = tid_to_tblock(tid);
/*
* The order of the tlocks in the transaction is important
@@ -706,17 +710,18 @@
*/
tlck->tid = tid;
+ TXN_UNLOCK();
+
/* mark tlock for meta-data page */
if (mp->xflag & COMMIT_PAGE) {
tlck->flag = tlckPAGELOCK;
/* mark the page dirty and nohomeok */
- mark_metapage_dirty(mp);
- atomic_inc(&mp->nohomeok);
+ metapage_nohomeok(mp);
jfs_info("locking mp = 0x%p, nohomeok = %d tid = %d tlck = 0x%p",
- mp, atomic_read(&mp->nohomeok), tid, tlck);
+ mp, mp->nohomeok, tid, tlck);
/* if anonymous transaction, and buffer is on the group
* commit synclist, mark inode to show this. This will
@@ -762,8 +767,10 @@
if (tlck->next == 0) {
/* This inode's first anonymous transaction */
jfs_ip->atltail = lid;
+ TXN_LOCK();
list_add_tail(&jfs_ip->anon_inode_list,
&TxAnchor.anon_list);
+ TXN_UNLOCK();
}
}
@@ -821,8 +828,6 @@
grantLock:
tlck->type |= type;
- TXN_UNLOCK();
-
return tlck;
/*
@@ -841,11 +846,19 @@
BUG();
}
INCREMENT(stattx.waitlock); /* statistics */
+ TXN_UNLOCK();
release_metapage(mp);
+ TXN_LOCK();
+ xtid = tlck->tid; /* reaquire after dropping TXN_LOCK */
jfs_info("txLock: in waitLock, tid = %d, xtid = %d, lid = %d",
tid, xtid, lid);
- TXN_SLEEP_DROP_LOCK(&tid_to_tblock(xtid)->waitor);
+
+ /* Recheck everything since dropping TXN_LOCK */
+ if (xtid && (tlck->mp == mp) && (mp->lid == lid))
+ TXN_SLEEP_DROP_LOCK(&tid_to_tblock(xtid)->waitor);
+ else
+ TXN_UNLOCK();
jfs_info("txLock: awakened tid = %d, lid = %d", tid, lid);
return NULL;
@@ -906,6 +919,7 @@
struct metapage *mp;
struct jfs_log *log;
int difft, diffp;
+ unsigned long flags;
jfs_info("txUnlock: tblk = 0x%p", tblk);
log = JFS_SBI(tblk->sb)->log;
@@ -925,19 +939,14 @@
assert(mp->xflag & COMMIT_PAGE);
/* hold buffer
- *
- * It's possible that someone else has the metapage.
- * The only things were changing are nohomeok, which
- * is handled atomically, and clsn which is protected
- * by the LOGSYNC_LOCK.
*/
- hold_metapage(mp, 1);
+ hold_metapage(mp);
- assert(atomic_read(&mp->nohomeok) > 0);
- atomic_dec(&mp->nohomeok);
+ assert(mp->nohomeok > 0);
+ _metapage_homeok(mp);
/* inherit younger/larger clsn */
- LOGSYNC_LOCK(log);
+ LOGSYNC_LOCK(log, flags);
if (mp->clsn) {
logdiff(difft, tblk->clsn, log);
logdiff(diffp, mp->clsn, log);
@@ -945,16 +954,11 @@
mp->clsn = tblk->clsn;
} else
mp->clsn = tblk->clsn;
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
assert(!(tlck->flag & tlckFREEPAGE));
- if (tlck->flag & tlckWRITEPAGE) {
- write_metapage(mp);
- } else {
- /* release page which has been forced */
- release_metapage(mp);
- }
+ put_metapage(mp);
}
/* insert tlock, and linelock(s) of the tlock if any,
@@ -981,10 +985,10 @@
* has been inserted in logsync list at txUpdateMap())
*/
if (tblk->lsn) {
- LOGSYNC_LOCK(log);
+ LOGSYNC_LOCK(log, flags);
log->count--;
list_del(&tblk->synclist);
- LOGSYNC_UNLOCK(log);
+ LOGSYNC_UNLOCK(log, flags);
}
}
@@ -1573,8 +1577,8 @@
* the last entry, so don't bother logging this
*/
mp->lid = 0;
- hold_metapage(mp, 0);
- atomic_dec(&mp->nohomeok);
+ grab_metapage(mp);
+ metapage_homeok(mp);
discard_metapage(mp);
tlck->mp = NULL;
return 0;
@@ -2270,7 +2274,8 @@
tlck->flag &= ~tlckWRITEPAGE;
/* do not release page to freelist */
-
+ force_metapage(mp);
+#if 0
/*
* The "right" thing to do here is to
* synchronously write the metadata.
@@ -2282,9 +2287,10 @@
* we can get by with synchronously writing
* the pages when they are released.
*/
- assert(atomic_read(&mp->nohomeok));
+ assert(mp->nohomeok);
set_bit(META_dirty, &mp->flag);
set_bit(META_sync, &mp->flag);
+#endif
}
}
}
@@ -2344,7 +2350,7 @@
*/
mp = tlck->mp;
ASSERT(mp->xflag & COMMIT_PAGE);
- hold_metapage(mp, 0);
+ grab_metapage(mp);
}
/*
@@ -2394,8 +2400,8 @@
ASSERT(mp->lid == lid);
tlck->mp->lid = 0;
}
- assert(atomic_read(&mp->nohomeok) == 1);
- atomic_dec(&mp->nohomeok);
+ assert(mp->nohomeok == 1);
+ metapage_homeok(mp);
discard_metapage(mp);
tlck->mp = NULL;
}
@@ -2861,24 +2867,9 @@
{
struct jfs_log *log = mp->log;
- assert(atomic_read(&mp->nohomeok));
+ assert(mp->nohomeok);
assert(log);
- atomic_dec(&mp->nohomeok);
-
- if (atomic_read(&mp->nohomeok))
- return;
-
- hold_metapage(mp, 0);
-
- LOGSYNC_LOCK(log);
- mp->log = NULL;
- mp->lsn = 0;
- mp->clsn = 0;
- log->count--;
- list_del_init(&mp->synclist);
- LOGSYNC_UNLOCK(log);
-
- release_metapage(mp);
+ metapage_homeok(mp);
}
/*
diff --git a/fs/jfs/jfs_umount.c b/fs/jfs/jfs_umount.c
index f31a9e3..5cf9178 100644
--- a/fs/jfs/jfs_umount.c
+++ b/fs/jfs/jfs_umount.c
@@ -49,7 +49,6 @@
*/
int jfs_umount(struct super_block *sb)
{
- struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
@@ -109,8 +108,8 @@
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
- filemap_fdatawrite(bdev_mapping);
- filemap_fdatawait(bdev_mapping);
+ filemap_fdatawrite(sbi->direct_inode->i_mapping);
+ filemap_fdatawait(sbi->direct_inode->i_mapping);
/*
* ensure all file system file pages are propagated to their
@@ -123,9 +122,6 @@
if (log) { /* log = NULL if read-only mount */
updateSuper(sb, FM_CLEAN);
- /* Restore default gfp_mask for bdev */
- mapping_set_gfp_mask(bdev_mapping, GFP_USER);
-
/*
* close log:
*
@@ -140,7 +136,6 @@
int jfs_umount_rw(struct super_block *sb)
{
- struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct jfs_log *log = sbi->log;
@@ -166,13 +161,10 @@
* mark the superblock clean before everything is flushed to
* disk.
*/
- filemap_fdatawrite(bdev_mapping);
- filemap_fdatawait(bdev_mapping);
+ filemap_fdatawrite(sbi->direct_inode->i_mapping);
+ filemap_fdatawait(sbi->direct_inode->i_mapping);
updateSuper(sb, FM_CLEAN);
- /* Restore default gfp_mask for bdev */
- mapping_set_gfp_mask(bdev_mapping, GFP_USER);
-
return lmLogClose(sb);
}
diff --git a/fs/jfs/resize.c b/fs/jfs/resize.c
index 2eb6869..c6dc254 100644
--- a/fs/jfs/resize.c
+++ b/fs/jfs/resize.c
@@ -209,6 +209,9 @@
*/
txQuiesce(sb);
+ /* Reset size of direct inode */
+ sbi->direct_inode->i_size = sb->s_bdev->bd_inode->i_size;
+
if (sbi->mntflag & JFS_INLINELOG) {
/*
* deactivate old inline log
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 5856866..0812005 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -210,6 +210,10 @@
unload_nls(sbi->nls_tab);
sbi->nls_tab = NULL;
+ truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
+ iput(sbi->direct_inode);
+ sbi->direct_inode = NULL;
+
kfree(sbi);
}
@@ -358,6 +362,12 @@
}
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
+ /*
+ * Invalidate any previously read metadata. fsck may have
+ * changed the on-disk data since we mounted r/o
+ */
+ truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
+
JFS_SBI(sb)->flag = flag;
return jfs_mount_rw(sb, 1);
}
@@ -428,12 +438,26 @@
sb->s_op = &jfs_super_operations;
sb->s_export_op = &jfs_export_operations;
+ /*
+ * Initialize direct-mapping inode/address-space
+ */
+ inode = new_inode(sb);
+ if (inode == NULL)
+ goto out_kfree;
+ inode->i_ino = 0;
+ inode->i_nlink = 1;
+ inode->i_size = sb->s_bdev->bd_inode->i_size;
+ inode->i_mapping->a_ops = &jfs_metapage_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
+
+ sbi->direct_inode = inode;
+
rc = jfs_mount(sb);
if (rc) {
if (!silent) {
jfs_err("jfs_mount failed w/return code = %d", rc);
}
- goto out_kfree;
+ goto out_mount_failed;
}
if (sb->s_flags & MS_RDONLY)
sbi->log = NULL;
@@ -482,6 +506,13 @@
if (rc) {
jfs_err("jfs_umount failed with return code %d", rc);
}
+out_mount_failed:
+ filemap_fdatawrite(sbi->direct_inode->i_mapping);
+ filemap_fdatawait(sbi->direct_inode->i_mapping);
+ truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
+ make_bad_inode(sbi->direct_inode);
+ iput(sbi->direct_inode);
+ sbi->direct_inode = NULL;
out_kfree:
if (sbi->nls_tab)
unload_nls(sbi->nls_tab);