From 059c138bc79320bd7d6fba91bad4d50eeec9c31f Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 8 Mar 2011 16:39:48 +0530 Subject: [PATCH] fs/9p: Use truncate_setsize instead of vmtruncate convert vmtruncate usage to truncate_setsize. We also writeback all dirty pages before doing 9p operations and on success call truncate_setsize. This ensure that we continue sanely on failed truncate on the server. The disadvantage is that we are now going to write back the content that get thrown away later as a part of truncate. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- fs/9p/vfs_inode.c | 16 ++++++++++------ fs/9p/vfs_inode_dotl.c | 12 +++++------- 2 files changed, 15 insertions(+), 13 deletions(-) diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index c6cef2495f00..0afbbb450faf 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -971,6 +971,10 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) struct p9_wstat wstat; P9_DPRINTK(P9_DEBUG_VFS, "\n"); + retval = inode_change_ok(dentry->d_inode, iattr); + if (retval) + return retval; + retval = -EPERM; v9ses = v9fs_inode2v9ses(dentry->d_inode); fid = v9fs_fid_lookup(dentry); @@ -997,12 +1001,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) if (iattr->ia_valid & ATTR_GID) wstat.n_gid = iattr->ia_gid; } - 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; - } + /* Write all dirty data */ if (S_ISREG(dentry->d_inode->i_mode)) filemap_write_and_wait(dentry->d_inode->i_mapping); @@ -1010,6 +1009,11 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) retval = p9_client_wstat(fid, &wstat); if (retval < 0) return retval; + + if ((iattr->ia_valid & ATTR_SIZE) && + iattr->ia_size != i_size_read(dentry->d_inode)) + truncate_setsize(dentry->d_inode, iattr->ia_size); + v9fs_invalidate_inode_attr(dentry->d_inode); setattr_copy(dentry->d_inode, iattr); diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index 327c578c7ba6..0a0ac30d51d6 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -456,12 +456,6 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) if (IS_ERR(fid)) return PTR_ERR(fid); - 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; - } /* Write all dirty data */ if (S_ISREG(dentry->d_inode->i_mode)) filemap_write_and_wait(dentry->d_inode->i_mapping); @@ -469,8 +463,12 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 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)) + truncate_setsize(dentry->d_inode, iattr->ia_size); + + v9fs_invalidate_inode_attr(dentry->d_inode); setattr_copy(dentry->d_inode, iattr); mark_inode_dirty(dentry->d_inode); if (iattr->ia_valid & ATTR_MODE) { -- 2.30.2