[PATCH -mm] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)
From: OGAWA Hirofumi (hirofumi_at_mail.parknet.co.jp)
Date: 11/07/05
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To: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org, Trond.Myklebust@netapp.com, ericvh@gmail.com, sfrench@samba.org, shaggy@austin.ibm.com, nathans@sgi.com Date: Tue, 08 Nov 2005 04:10:37 +0900
Hi,
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.
Thanks.
---
fs/9p/vfs_dir.c | 3 +--
fs/9p/vfs_file.c | 3 +--
fs/buffer.c | 10 ++--------
fs/cifs/file.c | 6 ++----
fs/cifs/inode.c | 3 +--
fs/jfs/jfs_dmap.c | 3 +--
fs/jfs/jfs_imap.c | 6 ++----
fs/jfs/jfs_txnmgr.c | 6 ++----
fs/jfs/jfs_umount.c | 6 ++----
fs/jfs/resize.c | 3 +--
fs/jfs/super.c | 3 +--
fs/nfs/inode.c | 6 ++----
fs/smbfs/file.c | 3 +--
fs/smbfs/inode.c | 3 +--
fs/xfs/linux-2.6/xfs_fs_subr.c | 3 +--
mm/filemap.c | 40 +++++++++++++++++++++++++++-------------
16 files changed, 48 insertions(+), 59 deletions(-)
diff -puN fs/9p/vfs_dir.c~export-filemap_write_and_wait fs/9p/vfs_dir.c
--- linux-2.6.14-mm/fs/9p/vfs_dir.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/9p/vfs_dir.c 2005-11-08 00:15:55.000000000 +0900
@@ -193,8 +193,7 @@ int v9fs_dir_release(struct inode *inode
fid->fid);
fidnum = fid->fid;
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
if (fidnum >= 0) {
dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
diff -puN fs/9p/vfs_file.c~export-filemap_write_and_wait fs/9p/vfs_file.c
--- linux-2.6.14-mm/fs/9p/vfs_file.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/9p/vfs_file.c 2005-11-08 00:15:55.000000000 +0900
@@ -165,8 +165,7 @@ static int v9fs_file_lock(struct file *f
return -ENOLCK;
if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
invalidate_inode_pages(&inode->i_data);
}
diff -puN fs/buffer.c~export-filemap_write_and_wait fs/buffer.c
--- linux-2.6.14-mm/fs/buffer.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/buffer.c 2005-11-08 00:15:55.000000000 +0900
@@ -153,14 +153,8 @@ int sync_blockdev(struct block_device *b
{
int ret = 0;
- if (bdev) {
- int err;
-
- ret = filemap_fdatawrite(bdev->bd_inode->i_mapping);
- err = filemap_fdatawait(bdev->bd_inode->i_mapping);
- if (!ret)
- ret = err;
- }
+ if (bdev)
+ ret = filemap_write_and_wait(bdev->bd_inode->i_mapping);
return ret;
}
EXPORT_SYMBOL(sync_blockdev);
diff -puN fs/cifs/file.c~export-filemap_write_and_wait fs/cifs/file.c
--- linux-2.6.14-mm/fs/cifs/file.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/cifs/file.c 2005-11-08 00:15:55.000000000 +0900
@@ -127,8 +127,7 @@ static inline int cifs_open_inode_helper
if (file->f_dentry->d_inode->i_mapping) {
/* BB no need to lock inode until after invalidate
since namei code should already have it locked? */
- filemap_fdatawrite(file->f_dentry->d_inode->i_mapping);
- filemap_fdatawait(file->f_dentry->d_inode->i_mapping);
+ filemap_write_and_wait(file->f_dentry->d_inode->i_mapping);
}
cFYI(1, ("invalidating remote inode since open detected it "
"changed"));
@@ -419,8 +418,7 @@ static int cifs_reopen_file(struct inode
pCifsInode = CIFS_I(inode);
if (pCifsInode) {
if (can_flush) {
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
/* temporarily disable caching while we
go to server to get inode info */
pCifsInode->clientCanCacheAll = FALSE;
diff -puN fs/cifs/inode.c~export-filemap_write_and_wait fs/cifs/inode.c
--- linux-2.6.14-mm/fs/cifs/inode.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/cifs/inode.c 2005-11-08 00:15:55.000000000 +0900
@@ -987,8 +987,7 @@ int cifs_setattr(struct dentry *direntry
/* BB check if we need to refresh inode from server now ? BB */
/* need to flush data before changing file size on server */
- filemap_fdatawrite(direntry->d_inode->i_mapping);
- filemap_fdatawait(direntry->d_inode->i_mapping);
+ filemap_write_and_wait(direntry->d_inode->i_mapping);
if (attrs->ia_valid & ATTR_SIZE) {
/* To avoid spurious oplock breaks from server, in the case of
diff -puN fs/jfs/jfs_dmap.c~export-filemap_write_and_wait fs/jfs/jfs_dmap.c
--- linux-2.6.14-mm/fs/jfs/jfs_dmap.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/jfs_dmap.c 2005-11-08 00:15:55.000000000 +0900
@@ -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);
diff -puN fs/jfs/jfs_imap.c~export-filemap_write_and_wait fs/jfs/jfs_imap.c
--- linux-2.6.14-mm/fs/jfs/jfs_imap.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/jfs_imap.c 2005-11-08 00:15:55.000000000 +0900
@@ -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);
}
diff -puN fs/jfs/jfs_txnmgr.c~export-filemap_write_and_wait fs/jfs/jfs_txnmgr.c
--- linux-2.6.14-mm/fs/jfs/jfs_txnmgr.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/jfs_txnmgr.c 2005-11-08 00:15:55.000000000 +0900
@@ -1231,10 +1231,8 @@ int txCommit(tid_t tid, /* transaction
* 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);
*/
/*
diff -puN fs/jfs/jfs_umount.c~export-filemap_write_and_wait fs/jfs/jfs_umount.c
--- linux-2.6.14-mm/fs/jfs/jfs_umount.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/jfs_umount.c 2005-11-08 00:15:55.000000000 +0900
@@ -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);
diff -puN fs/jfs/resize.c~export-filemap_write_and_wait fs/jfs/resize.c
--- linux-2.6.14-mm/fs/jfs/resize.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/resize.c 2005-11-08 00:15:55.000000000 +0900
@@ -376,8 +376,7 @@ int jfs_extendfs(struct super_block *sb,
* 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 */
diff -puN fs/jfs/super.c~export-filemap_write_and_wait fs/jfs/super.c
--- linux-2.6.14-mm/fs/jfs/super.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/jfs/super.c 2005-11-08 00:15:55.000000000 +0900
@@ -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);
diff -puN fs/nfs/inode.c~export-filemap_write_and_wait fs/nfs/inode.c
--- linux-2.6.14-mm/fs/nfs/inode.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/nfs/inode.c 2005-11-08 00:15:55.000000000 +0900
@@ -850,8 +850,7 @@ nfs_setattr(struct dentry *dentry, struc
nfs_begin_data_update(inode);
/* Write all dirty data if we're changing file permissions or size */
if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) {
- if (filemap_fdatawrite(inode->i_mapping) == 0)
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
nfs_wb_all(inode);
}
/*
@@ -1194,8 +1193,7 @@ void nfs_revalidate_mapping(struct inode
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
if (S_ISREG(inode->i_mode)) {
- if (filemap_fdatawrite(mapping) == 0)
- filemap_fdatawait(mapping);
+ filemap_write_and_wait(mapping);
nfs_wb_all(inode);
}
invalidate_inode_pages2(mapping);
diff -puN fs/smbfs/file.c~export-filemap_write_and_wait fs/smbfs/file.c
--- linux-2.6.14-mm/fs/smbfs/file.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/smbfs/file.c 2005-11-08 00:15:55.000000000 +0900
@@ -374,8 +374,7 @@ smb_file_release(struct inode *inode, st
/* We must flush any dirty pages now as we won't be able to
write anything after close. mmap can trigger this.
"openers" should perhaps include mmap'ers ... */
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
smb_close(inode);
}
unlock_kernel();
diff -puN fs/smbfs/inode.c~export-filemap_write_and_wait fs/smbfs/inode.c
--- linux-2.6.14-mm/fs/smbfs/inode.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/smbfs/inode.c 2005-11-08 00:15:55.000000000 +0900
@@ -697,8 +697,7 @@ smb_notify_change(struct dentry *dentry,
DENTRY_PATH(dentry),
(long) inode->i_size, (long) attr->ia_size);
- filemap_fdatawrite(inode->i_mapping);
- filemap_fdatawait(inode->i_mapping);
+ filemap_write_and_wait(inode->i_mapping);
error = smb_open(dentry, O_WRONLY);
if (error)
diff -puN fs/xfs/linux-2.6/xfs_fs_subr.c~export-filemap_write_and_wait fs/xfs/linux-2.6/xfs_fs_subr.c
--- linux-2.6.14-mm/fs/xfs/linux-2.6/xfs_fs_subr.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/fs/xfs/linux-2.6/xfs_fs_subr.c 2005-11-08 00:15:55.000000000 +0900
@@ -79,8 +79,7 @@ fs_flushinval_pages(
struct inode *ip = LINVFS_GET_IP(vp);
if (VN_CACHED(vp)) {
- filemap_fdatawrite(ip->i_mapping);
- filemap_fdatawait(ip->i_mapping);
+ filemap_write_and_wait(ip->i_mapping);
truncate_inode_pages(ip->i_mapping, first);
}
diff -puN mm/filemap.c~export-filemap_write_and_wait mm/filemap.c
--- linux-2.6.14-mm/mm/filemap.c~export-filemap_write_and_wait 2005-11-08 00:15:54.000000000 +0900
+++ linux-2.6.14-mm-hirofumi/mm/filemap.c 2005-11-08 00:15:55.000000000 +0900
@@ -345,30 +345,44 @@ EXPORT_SYMBOL(filemap_fdatawait);
int filemap_write_and_wait(struct address_space *mapping)
{
- int retval = 0;
+ int err = 0;
if (mapping->nrpages) {
- retval = filemap_fdatawrite(mapping);
- if (retval == 0)
- retval = filemap_fdatawait(mapping);
+ err = filemap_fdatawrite(mapping);
+ /*
+ * Even if the above returned error, the pages may be
+ * written partially (e.g. -ENOSPC), so we wait for it.
+ * But the -EIO is special case, it may indicate the worst
+ * thing (e.g. bug) happened, so we avoid waiting for it.
+ */
+ if (err != -EIO) {
+ int err2 = filemap_fdatawait(mapping);
+ if (!err)
+ err = err2;
+ }
}
- return retval;
+ return err;
}
+EXPORT_SYMBOL(filemap_write_and_wait);
int filemap_write_and_wait_range(struct address_space *mapping,
loff_t lstart, loff_t lend)
{
- int retval = 0;
+ int err = 0;
if (mapping->nrpages) {
- retval = __filemap_fdatawrite_range(mapping, lstart, lend,
- WB_SYNC_ALL);
- if (retval == 0)
- retval = wait_on_page_writeback_range(mapping,
- lstart >> PAGE_CACHE_SHIFT,
- lend >> PAGE_CACHE_SHIFT);
+ err = __filemap_fdatawrite_range(mapping, lstart, lend,
+ WB_SYNC_ALL);
+ /* See comment of filemap_write_and_wait() */
+ if (err != -EIO) {
+ int err2 = wait_on_page_writeback_range(mapping,
+ lstart >> PAGE_CACHE_SHIFT,
+ lend >> PAGE_CACHE_SHIFT);
+ if (!err)
+ err = err2;
+ }
}
- return retval;
+ return err;
}
/*
_
-
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