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NFS: Don't force a dcache revalidation if nfs_wcc_update_inode succeeds 

The reason is that if the weak cache consistency update was successful,
then we know that our client must be the only one that changed the
directory, and we've already updated the dcache to reflect the change.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2007-09-27 10:07:31 -04:00
parent e323ea46d9
commit 17cadc9537
3 changed files with 11 additions and 11 deletions
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11
fs/nfs/inode.c
View File

@ -791,24 +791,18 @@ void nfs_end_data_update(struct inode *inode)
static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
struct nfs_inode *nfsi = NFS_I(inode);
unsigned long now = jiffies;
/* If we have atomic WCC data, we may update some attributes */
if ((fattr->valid & NFS_ATTR_WCC) != 0) {
if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
nfsi->cache_change_attribute = now;
}
if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
if (S_ISDIR(inode->i_mode))
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
nfsi->cache_change_attribute = now;
}
if (inode->i_size == fattr->pre_size && nfsi->npages == 0) {
if (inode->i_size == fattr->pre_size && nfsi->npages == 0)
inode->i_size = fattr->size;
nfsi->cache_change_attribute = now;
}
}
}
@ -919,6 +913,7 @@ int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
nfsi->cache_change_attribute = jiffies;
spin_unlock(&inode->i_lock);
goto out;
}

7
fs/nfs/nfs4proc.c
View File

@ -208,9 +208,12 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
struct nfs_inode *nfsi = NFS_I(dir);
spin_lock(&dir->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
if (cinfo->before == nfsi->change_attr && cinfo->atomic)
if (cinfo->after != nfsi->change_attr) {
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
nfsi->cache_change_attribute = jiffies;
nfsi->change_attr = cinfo->after;
}
spin_unlock(&dir->i_lock);
}

4
include/linux/nfs_fs.h
View File

@ -235,8 +235,10 @@ static inline void nfs_mark_for_revalidate(struct inode *inode)
spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
if (S_ISDIR(inode->i_mode))
if (S_ISDIR(inode->i_mode)) {
nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
nfsi->cache_change_attribute = jiffies;
}
spin_unlock(&inode->i_lock);
}