9p: cache meta-data when cache=loose
This patch expands the impact of the loose cache mode to allow for cached metadata increasing the performance of directory listings and other metadata read operations. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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@ -67,10 +67,14 @@ int v9fs_file_open(struct inode *inode, struct file *file)
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return PTR_ERR(fid);
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return PTR_ERR(fid);
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err = p9_client_open(fid, omode);
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err = p9_client_open(fid, omode);
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if (err < 0) {
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if (err < 0) {
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p9_client_clunk(fid);
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p9_client_clunk(fid);
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return err;
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return err;
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}
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}
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if (omode & P9_OTRUNC) {
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inode->i_size = 0;
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inode->i_blocks = 0;
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}
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}
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}
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file->private_data = fid;
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file->private_data = fid;
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@ -151,6 +155,7 @@ v9fs_file_write(struct file *filp, const char __user * data,
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{
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{
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int ret;
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int ret;
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struct p9_fid *fid;
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struct p9_fid *fid;
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struct inode *inode = filp->f_path.dentry->d_inode;
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P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
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P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
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(int)count, (int)*offset);
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(int)count, (int)*offset);
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@ -160,7 +165,12 @@ v9fs_file_write(struct file *filp, const char __user * data,
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if (ret > 0)
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if (ret > 0)
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*offset += ret;
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*offset += ret;
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invalidate_inode_pages2(filp->f_path.dentry->d_inode->i_mapping);
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if (*offset > inode->i_size) {
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inode->i_size = *offset;
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inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
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}
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invalidate_inode_pages2(inode->i_mapping);
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return ret;
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return ret;
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}
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}
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@ -716,6 +716,9 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
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P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
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P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
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err = -EPERM;
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err = -EPERM;
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v9ses = v9fs_inode2v9ses(dentry->d_inode);
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v9ses = v9fs_inode2v9ses(dentry->d_inode);
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if (v9ses->cache == CACHE_LOOSE)
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return simple_getattr(mnt, dentry, stat);
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fid = v9fs_fid_lookup(dentry);
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fid = v9fs_fid_lookup(dentry);
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if (IS_ERR(fid))
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if (IS_ERR(fid))
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return PTR_ERR(fid);
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return PTR_ERR(fid);
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