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-rw-r--r--fs/xfs/linux-2.6/xfs_buf.h4
-rw-r--r--fs/xfs/xfs_log.c12
2 files changed, 8 insertions, 8 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index ceda3a2859d2..7858703ed84c 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -246,8 +246,8 @@ extern void xfs_buf_trace(xfs_buf_t *, char *, void *, void *);
246#define BUF_BUSY XBF_DONT_BLOCK 246#define BUF_BUSY XBF_DONT_BLOCK
247 247
248#define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) 248#define XFS_BUF_BFLAGS(bp) ((bp)->b_flags)
249#define XFS_BUF_ZEROFLAGS(bp) \ 249#define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \
250 ((bp)->b_flags &= ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI)) 250 ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED))
251 251
252#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XFS_B_STALE) 252#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XFS_B_STALE)
253#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XFS_B_STALE) 253#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XFS_B_STALE)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index e730328636c3..21ac1a67e3e0 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1413,7 +1413,7 @@ xlog_sync(xlog_t *log,
1413 ops = iclog->ic_header.h_num_logops; 1413 ops = iclog->ic_header.h_num_logops;
1414 INT_SET(iclog->ic_header.h_num_logops, ARCH_CONVERT, ops); 1414 INT_SET(iclog->ic_header.h_num_logops, ARCH_CONVERT, ops);
1415 1415
1416 bp = iclog->ic_bp; 1416 bp = iclog->ic_bp;
1417 ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == (unsigned long)1); 1417 ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == (unsigned long)1);
1418 XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2); 1418 XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2);
1419 XFS_BUF_SET_ADDR(bp, BLOCK_LSN(INT_GET(iclog->ic_header.h_lsn, ARCH_CONVERT))); 1419 XFS_BUF_SET_ADDR(bp, BLOCK_LSN(INT_GET(iclog->ic_header.h_lsn, ARCH_CONVERT)));
@@ -1430,15 +1430,14 @@ xlog_sync(xlog_t *log,
1430 } 1430 }
1431 XFS_BUF_SET_PTR(bp, (xfs_caddr_t) &(iclog->ic_header), count); 1431 XFS_BUF_SET_PTR(bp, (xfs_caddr_t) &(iclog->ic_header), count);
1432 XFS_BUF_SET_FSPRIVATE(bp, iclog); /* save for later */ 1432 XFS_BUF_SET_FSPRIVATE(bp, iclog); /* save for later */
1433 XFS_BUF_ZEROFLAGS(bp);
1433 XFS_BUF_BUSY(bp); 1434 XFS_BUF_BUSY(bp);
1434 XFS_BUF_ASYNC(bp); 1435 XFS_BUF_ASYNC(bp);
1435 /* 1436 /*
1436 * Do an ordered write for the log block. 1437 * Do an ordered write for the log block.
1437 * 1438 * Its unnecessary to flush the first split block in the log wrap case.
1438 * It may not be needed to flush the first split block in the log wrap
1439 * case, but do it anyways to be safe -AK
1440 */ 1439 */
1441 if (log->l_mp->m_flags & XFS_MOUNT_BARRIER) 1440 if (!split && (log->l_mp->m_flags & XFS_MOUNT_BARRIER))
1442 XFS_BUF_ORDERED(bp); 1441 XFS_BUF_ORDERED(bp);
1443 1442
1444 ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1); 1443 ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1);
@@ -1460,7 +1459,7 @@ xlog_sync(xlog_t *log,
1460 return error; 1459 return error;
1461 } 1460 }
1462 if (split) { 1461 if (split) {
1463 bp = iclog->ic_log->l_xbuf; 1462 bp = iclog->ic_log->l_xbuf;
1464 ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) == 1463 ASSERT(XFS_BUF_FSPRIVATE2(bp, unsigned long) ==
1465 (unsigned long)1); 1464 (unsigned long)1);
1466 XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2); 1465 XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)2);
@@ -1468,6 +1467,7 @@ xlog_sync(xlog_t *log,
1468 XFS_BUF_SET_PTR(bp, (xfs_caddr_t)((__psint_t)&(iclog->ic_header)+ 1467 XFS_BUF_SET_PTR(bp, (xfs_caddr_t)((__psint_t)&(iclog->ic_header)+
1469 (__psint_t)count), split); 1468 (__psint_t)count), split);
1470 XFS_BUF_SET_FSPRIVATE(bp, iclog); 1469 XFS_BUF_SET_FSPRIVATE(bp, iclog);
1470 XFS_BUF_ZEROFLAGS(bp);
1471 XFS_BUF_BUSY(bp); 1471 XFS_BUF_BUSY(bp);
1472 XFS_BUF_ASYNC(bp); 1472 XFS_BUF_ASYNC(bp);
1473 if (log->l_mp->m_flags & XFS_MOUNT_BARRIER) 1473 if (log->l_mp->m_flags & XFS_MOUNT_BARRIER)
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-20 11:02:31 -0400
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/*
 *  linux/fs/block_dev.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *  Copyright (C) 2001  Andrea Arcangeli <andrea@suse.de> SuSE
 */

#include <linux/init.h>
#include <linux/mm.h>
#include <linux/fcntl.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/major.h>
#include <linux/device_cgroup.h>
#include <linux/highmem.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <linux/module.h>
#include <linux/blkpg.h>
#include <linux/magic.h>
#include <linux/buffer_head.h>
#include <linux/swap.h>
#include <linux/pagevec.h>
#include <linux/writeback.h>
#include <linux/mpage.h>
#include <linux/mount.h>
#include <linux/uio.h>
#include <linux/namei.h>
#include <linux/log2.h>
#include <linux/cleancache.h>
#include <linux/dax.h>
#include <linux/badblocks.h>
#include <linux/falloc.h>
#include <asm/uaccess.h>
#include "internal.h"

struct bdev_inode {
	struct block_device bdev;
	struct inode vfs_inode;
};

static const struct address_space_operations def_blk_aops;

static inline struct bdev_inode *BDEV_I(struct inode *inode)
{
	return container_of(inode, struct bdev_inode, vfs_inode);
}

struct block_device *I_BDEV(struct inode *inode)
{
	return &BDEV_I(inode)->bdev;
}
EXPORT_SYMBOL(I_BDEV);

void __vfs_msg(struct super_block *sb, const char *prefix, const char *fmt, ...)
{
	struct va_format vaf;
	va_list args;

	va_start(args, fmt);
	vaf.fmt = fmt;
	vaf.va = &args;
	printk_ratelimited("%sVFS (%s): %pV\n", prefix, sb->s_id, &vaf);
	va_end(args);
}

static void bdev_write_inode(struct block_device *bdev)
{
	struct inode *inode = bdev->bd_inode;
	int ret;

	spin_lock(&inode->i_lock);
	while (inode->i_state & I_DIRTY) {
		spin_unlock(&inode->i_lock);
		ret = write_inode_now(inode, true);
		if (ret) {
			char name[BDEVNAME_SIZE];
			pr_warn_ratelimited("VFS: Dirty inode writeback failed "
					    "for block device %s (err=%d).\n",
					    bdevname(bdev, name), ret);
		}
		spin_lock(&inode->i_lock);
	}
	spin_unlock(&inode->i_lock);
}

/* Kill _all_ buffers and pagecache , dirty or not.. */
void kill_bdev(struct block_device *bdev)
{
	struct address_space *mapping = bdev->bd_inode->i_mapping;

	if (mapping->nrpages == 0 && mapping->nrexceptional == 0)
		return;

	invalidate_bh_lrus();
	truncate_inode_pages(mapping, 0);
}	
EXPORT_SYMBOL(kill_bdev);

/* Invalidate clean unused buffers and pagecache. */
void invalidate_bdev(struct block_device *bdev)
{
	struct address_space *mapping = bdev->bd_inode->i_mapping;

	if (mapping->nrpages) {
		invalidate_bh_lrus();
		lru_add_drain_all();	/* make sure all lru add caches are flushed */
		invalidate_mapping_pages(mapping, 0, -1);
	}
	/* 99% of the time, we don't need to flush the cleancache on the bdev.
	 * But, for the strange corners, lets be cautious
	 */
	cleancache_invalidate_inode(mapping);
}
EXPORT_SYMBOL(invalidate_bdev);

int set_blocksize(struct block_device *bdev, int size)
{
	/* Size must be a power of two, and between 512 and PAGE_SIZE */
	if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size))
		return -EINVAL;

	/* Size cannot be smaller than the size supported by the device */
	if (size < bdev_logical_block_size(bdev))
		return -EINVAL;

	/* Don't change the size if it is same as current */
	if (bdev->bd_block_size != size) {
		sync_blockdev(bdev);
		bdev->bd_block_size = size;
		bdev->bd_inode->i_blkbits = blksize_bits(size);
		kill_bdev(bdev);
	}
	return 0;
}

EXPORT_SYMBOL(set_blocksize);

int sb_set_blocksize(struct super_block *sb, int size)
{
	if (set_blocksize(sb->s_bdev, size))
		return 0;
	/* If we get here, we know size is power of two
	 * and it's value is between 512 and PAGE_SIZE */
	sb->s_blocksize = size;
	sb->s_blocksize_bits = blksize_bits(size);
	return sb->s_blocksize;
}

EXPORT_SYMBOL(sb_set_blocksize);

int sb_min_blocksize(struct super_block *sb, int size)
{
	int minsize = bdev_logical_block_size(sb->s_bdev);
	if (size < minsize)
		size = minsize;
	return sb_set_blocksize(sb, size);
}

EXPORT_SYMBOL(sb_min_blocksize);

static int
blkdev_get_block(struct inode *inode, sector_t iblock,
		struct buffer_head *bh, int create)
{
	bh->b_bdev = I_BDEV(inode);
	bh->b_blocknr = iblock;
	set_buffer_mapped(bh);
	return 0;
}

static struct inode *bdev_file_inode(struct file *file)
{
	return file->f_mapping->host;
}

static ssize_t
blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
	struct file *file = iocb->ki_filp;
	struct inode *inode = bdev_file_inode(file);

	return __blockdev_direct_IO(iocb, inode, I_BDEV(inode), iter,
				    blkdev_get_block, NULL, NULL,
				    DIO_SKIP_DIO_COUNT);
}

int __sync_blockdev(struct block_device *bdev, int wait)
{
	if (!bdev)
		return 0;
	if (!wait)
		return filemap_flush(bdev->bd_inode->i_mapping);
	return filemap_write_and_wait(bdev->bd_inode->i_mapping);
}

/*
 * Write out and wait upon all the dirty data associated with a block
 * device via its mapping.  Does not take the superblock lock.
 */
int sync_blockdev(struct block_device *bdev)
{
	return __sync_blockdev(bdev, 1);
}
EXPORT_SYMBOL(sync_blockdev);

/*
 * Write out and wait upon all dirty data associated with this
 * device.   Filesystem data as well as the underlying block
 * device.  Takes the superblock lock.
 */
int fsync_bdev(struct block_device *bdev)
{
	struct super_block *sb = get_super(bdev);
	if (sb) {
		int res = sync_filesystem(sb);
		drop_super(sb);
		return res;
	}
	return sync_blockdev(bdev);
}
EXPORT_SYMBOL(fsync_bdev);

/**
 * freeze_bdev  --  lock a filesystem and force it into a consistent state
 * @bdev:	blockdevice to lock
 *
 * If a superblock is found on this device, we take the s_umount semaphore
 * on it to make sure nobody unmounts until the snapshot creation is done.
 * The reference counter (bd_fsfreeze_count) guarantees that only the last
 * unfreeze process can unfreeze the frozen filesystem actually when multiple
 * freeze requests arrive simultaneously. It counts up in freeze_bdev() and
 * count down in thaw_bdev(). When it becomes 0, thaw_bdev() will unfreeze
 * actually.
 */
struct super_block *freeze_bdev(struct block_device *bdev)
{
	struct super_block *sb;
	int error = 0;

	mutex_lock(&bdev->bd_fsfreeze_mutex);
	if (++bdev->bd_fsfreeze_count > 1) {
		/*
		 * We don't even need to grab a reference - the first call
		 * to freeze_bdev grab an active reference and only the last
		 * thaw_bdev drops it.
		 */
		sb = get_super(bdev);
		if (sb)
			drop_super(sb);
		mutex_unlock(&bdev->bd_fsfreeze_mutex);
		return sb;
	}

	sb = get_active_super(bdev);
	if (!sb)
		goto out;
	if (sb->s_op->freeze_super)
		error = sb->s_op->freeze_super(sb);
	else
		error = freeze_super(sb);
	if (error) {
		deactivate_super(sb);
		bdev->bd_fsfreeze_count--;
		mutex_unlock(&bdev->bd_fsfreeze_mutex);
		return ERR_PTR(error);
	}
	deactivate_super(sb);
 out:
	sync_blockdev(bdev);
	mutex_unlock(&bdev->bd_fsfreeze_mutex);
	return sb;	/* thaw_bdev releases s->s_umount */
}
EXPORT_SYMBOL(freeze_bdev);

/**
 * thaw_bdev  -- unlock filesystem
 * @bdev:	blockdevice to unlock
 * @sb:		associated superblock
 *