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fs/9p: call vmtruncate before setattr 9p opeation

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We need to call vmtruncate before 9p setattr operation, otherwise we
could write back some dirty pages between setattr with ATTR_SIZE and vmtruncate
causing some truncated pages to be written back to server

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Aneesh Kumar K.V 2011-02-28 17:04:10 +05:30 committed by Eric Van Hensbergen
parent c06c066a08
commit f10fc50f1a
2 changed files with 8 additions and 11 deletions
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10
fs/9p/vfs_inode.c
View file

@ -993,18 +993,16 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
if (iattr->ia_valid & ATTR_GID)
wstat.n_gid = iattr->ia_gid;
}
retval = p9_client_wstat(fid, &wstat);
if (retval < 0)
return retval;
v9fs_invalidate_inode_attr(dentry->d_inode);
if ((iattr->ia_valid & ATTR_SIZE) &&
iattr->ia_size != i_size_read(dentry->d_inode)) {
retval = vmtruncate(dentry->d_inode, iattr->ia_size);
if (retval)
return retval;
}
retval = p9_client_wstat(fid, &wstat);
if (retval < 0)
return retval;
v9fs_invalidate_inode_attr(dentry->d_inode);
setattr_copy(dentry->d_inode, iattr);
mark_inode_dirty(dentry->d_inode);

9
fs/9p/vfs_inode_dotl.c
View file

@ -453,17 +453,16 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
if (IS_ERR(fid))
return PTR_ERR(fid);
retval = p9_client_setattr(fid, &p9attr);
if (retval < 0)
return retval;
v9fs_invalidate_inode_attr(dentry->d_inode);
if ((iattr->ia_valid & ATTR_SIZE) &&
iattr->ia_size != i_size_read(dentry->d_inode)) {
retval = vmtruncate(dentry->d_inode, iattr->ia_size);
if (retval)
return retval;
}
retval = p9_client_setattr(fid, &p9attr);
if (retval < 0)
return retval;
v9fs_invalidate_inode_attr(dentry->d_inode);
setattr_copy(dentry->d_inode, iattr);
mark_inode_dirty(dentry->d_inode);