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[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)

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This patch add EXPORT_SYMBOL(filemap_write_and_wait) and use it.

See mm/filemap.c:

And changes the filemap_write_and_wait() and filemap_write_and_wait_range().

Current filemap_write_and_wait() doesn't wait if filemap_fdatawrite()
returns error.  However, even if filemap_fdatawrite() returned an
error, it may have submitted the partially data pages to the device.
(e.g. in the case of -ENOSPC)

<quotation>
Andrew Morton writes,

If filemap_fdatawrite() returns an error, this might be due to some
I/O problem: dead disk, unplugged cable, etc.  Given the generally
crappy quality of the kernel's handling of such exceptions, there's a
good chance that the filemap_fdatawait() will get stuck in D state
forever.
</quotation>

So, this patch doesn't wait if filemap_fdatawrite() returns the -EIO.

Trond, could you please review the nfs part?  Especially I'm not sure,
nfs must use the "filemap_fdatawrite(inode->i_mapping) == 0", or not.

Acked-by: Trond Myklebust <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
OGAWA Hirofumi 2006-01-08 01:02:14 -08:00 • committed by Linus Torvalds
commit 28fd129827
16 changed files with 48 additions and 61 deletions
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3
fs/jfs/jfs_dmap.c
View file

@ -302,8 +302,7 @@ int dbSync(struct inode *ipbmap)
/*
* write out dirty pages of bmap
*/
filemap_fdatawrite(ipbmap->i_mapping);
filemap_fdatawait(ipbmap->i_mapping);
filemap_write_and_wait(ipbmap->i_mapping);
diWriteSpecial(ipbmap, 0);

6
fs/jfs/jfs_imap.c
View file

@ -265,8 +265,7 @@ int diSync(struct inode *ipimap)
/*
* write out dirty pages of imap
*/
filemap_fdatawrite(ipimap->i_mapping);
filemap_fdatawait(ipimap->i_mapping);
filemap_write_and_wait(ipimap->i_mapping);
diWriteSpecial(ipimap, 0);
@ -565,8 +564,7 @@ void diFreeSpecial(struct inode *ip)
jfs_err("diFreeSpecial called with NULL ip!");
return;
}
filemap_fdatawrite(ip->i_mapping);
filemap_fdatawait(ip->i_mapping);
filemap_write_and_wait(ip->i_mapping);
truncate_inode_pages(ip->i_mapping, 0);
iput(ip);
}

6
fs/jfs/jfs_txnmgr.c
View file

@ -1231,10 +1231,8 @@ int txCommit(tid_t tid, /* transaction identifier */
* when we don't need to worry about it at all.
*
* if ((!S_ISDIR(ip->i_mode))
* && (tblk->flag & COMMIT_DELETE) == 0) {
* filemap_fdatawrite(ip->i_mapping);
* filemap_fdatawait(ip->i_mapping);
* }
* && (tblk->flag & COMMIT_DELETE) == 0)
* filemap_write_and_wait(ip->i_mapping);
*/
/*

6
fs/jfs/jfs_umount.c
View file

@ -108,8 +108,7 @@ int jfs_umount(struct super_block *sb)
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
filemap_fdatawrite(sbi->direct_inode->i_mapping);
filemap_fdatawait(sbi->direct_inode->i_mapping);
filemap_write_and_wait(sbi->direct_inode->i_mapping);
/*
* ensure all file system file pages are propagated to their
@ -161,8 +160,7 @@ int jfs_umount_rw(struct super_block *sb)
* mark the superblock clean before everything is flushed to
* disk.
*/
filemap_fdatawrite(sbi->direct_inode->i_mapping);
filemap_fdatawait(sbi->direct_inode->i_mapping);
filemap_write_and_wait(sbi->direct_inode->i_mapping);
updateSuper(sb, FM_CLEAN);

3
fs/jfs/resize.c
View file

@ -376,8 +376,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
* by txCommit();
*/
filemap_fdatawait(ipbmap->i_mapping);
filemap_fdatawrite(ipbmap->i_mapping);
filemap_fdatawait(ipbmap->i_mapping);
filemap_write_and_wait(ipbmap->i_mapping);
diWriteSpecial(ipbmap, 0);
newPage = nPages; /* first new page number */

3
fs/jfs/super.c
View file

@ -502,8 +502,7 @@ out_no_rw:
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);
filemap_write_and_wait(sbi->direct_inode->i_mapping);
truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
make_bad_inode(sbi->direct_inode);
iput(sbi->direct_inode);