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authorTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 17:16:30 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 16:07:37 -0400
commit7d52e86274e09fce8ac8f963e3605a84d0a305a7 (patch)
treeb9ecc05bbdff94aa344f39b53756bfddbd9db123 /fs
parent951a143b3fcf15cfa9d38250b7462f821db241db (diff)
downloadop-kernel-dev-7d52e86274e09fce8ac8f963e3605a84d0a305a7.zip
op-kernel-dev-7d52e86274e09fce8ac8f963e3605a84d0a305a7.tar.gz
[PATCH] NFS: Cleanup of caching code, and slight optimization of writes.
Unless we're doing O_APPEND writes, we really don't care about revalidating the file length. Just make sure that we catch any page cache invalidations. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/file.c12
-rw-r--r--fs/nfs/inode.c44
2 files changed, 38 insertions, 18 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index a606708..4043685 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -333,9 +333,15 @@ nfs_file_write(struct kiocb *iocb, const char __user *buf, size_t count, loff_t
result = -EBUSY;
if (IS_SWAPFILE(inode))
goto out_swapfile;
- result = nfs_revalidate_inode(NFS_SERVER(inode), inode);
- if (result)
- goto out;
+ /*
+ * O_APPEND implies that we must revalidate the file length.
+ */
+ if (iocb->ki_filp->f_flags & O_APPEND) {
+ result = nfs_revalidate_file_size(inode, iocb->ki_filp);
+ if (result)
+ goto out;
+ } else
+ nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
result = count;
if (!count)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index b2d1675..a3922f4 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1062,21 +1062,7 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
if (verifier == nfsi->cache_change_attribute)
nfsi->flags &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
/* Do the page cache invalidation */
- if (flags & NFS_INO_INVALID_DATA) {
- if (S_ISREG(inode->i_mode)) {
- if (filemap_fdatawrite(inode->i_mapping) == 0)
- filemap_fdatawait(inode->i_mapping);
- nfs_wb_all(inode);
- }
- nfsi->flags &= ~NFS_INO_INVALID_DATA;
- invalidate_inode_pages2(inode->i_mapping);
- memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
- dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
- inode->i_sb->s_id,
- (long long)NFS_FILEID(inode));
- /* This ensures we revalidate dentries */
- nfsi->cache_change_attribute++;
- }
+ nfs_revalidate_mapping(inode, inode->i_mapping);
if (flags & NFS_INO_INVALID_ACL)
nfs_zap_acl_cache(inode);
dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
@@ -1116,6 +1102,34 @@ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
}
/**
+ * nfs_revalidate_mapping - Revalidate the pagecache
+ * @inode - pointer to host inode
+ * @mapping - pointer to mapping
+ */
+void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+
+ if (nfsi->flags & NFS_INO_INVALID_DATA) {
+ if (S_ISREG(inode->i_mode)) {
+ if (filemap_fdatawrite(mapping) == 0)
+ filemap_fdatawait(mapping);
+ nfs_wb_all(inode);
+ }
+ invalidate_inode_pages2(mapping);
+ nfsi->flags &= ~NFS_INO_INVALID_DATA;
+ if (S_ISDIR(inode->i_mode)) {
+ memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
+ /* This ensures we revalidate child dentries */
+ nfsi->cache_change_attribute++;
+ }
+ dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
+ inode->i_sb->s_id,
+ (long long)NFS_FILEID(inode));
+ }
+}
+
+/**
* nfs_begin_data_update
* @inode - pointer to inode
* Declare that a set of operations will update file data on the server
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