spin_unlock(&cdst->i_ceph_lock);
}
+static bool get_caps_for_async_create(struct inode *dir, struct dentry *dentry)
+{
+ struct ceph_inode_info *ci = ceph_inode(dir);
+ int ret, want, got;
+
+ /*
+ * We can do an async create if we either have a valid negative dentry
+ * or the complete contents of the directory. Do a quick check without
+ * cap refs.
+ */
+ if ((d_in_lookup(dentry) && !__ceph_dir_is_complete(ci)) ||
+ !ceph_file_layout_is_valid(&ci->i_layout))
+ return false;
+
+ /* Try to get caps */
+ want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE;
+ ret = ceph_try_get_caps(dir, 0, want, true, &got);
+ dout("Fx on %p ret=%d got=%d\n", dir, ret, got);
+ if (ret != 1)
+ return false;
+ if (got != want) {
+ ceph_put_cap_refs(ci, got);
+ return false;
+ }
+
+ /* Check again, now that we hold cap refs */
+ if ((d_in_lookup(dentry) && !__ceph_dir_is_complete(ci)) ||
+ !ceph_file_layout_is_valid(&ci->i_layout)) {
+ ceph_put_cap_refs(ci, got);
+ return false;
+ }
+
+ return true;
+}
+
+static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
+ struct ceph_mds_request *req)
+{
+ /* If we never sent anything then nothing to clean up */
+ if (req->r_err == -ECHILD)
+ goto out;
+
+ mapping_set_error(req->r_parent->i_mapping, req->r_err);
+
+ if (req->r_target_inode) {
+ u64 ino = ceph_vino(req->r_target_inode).ino;
+
+ if (req->r_deleg_ino != ino)
+ pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%lx target=0x%llx\n",
+ __func__, req->r_err, req->r_deleg_ino, ino);
+ mapping_set_error(req->r_target_inode->i_mapping, req->r_err);
+ } else {
+ pr_warn("%s: no req->r_target_inode for 0x%lx\n", __func__,
+ req->r_deleg_ino);
+ }
+out:
+ ceph_put_cap_refs(ceph_inode(req->r_parent),
+ CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE);
+}
+
+static int ceph_finish_async_open(struct inode *dir, struct dentry *dentry,
+ struct file *file, umode_t mode,
+ struct ceph_mds_request *req,
+ struct ceph_acl_sec_ctx *as_ctx)
+{
+ int ret;
+ struct ceph_mds_reply_inode in = { };
+ struct ceph_mds_reply_info_in iinfo = { .in = &in };
+ struct ceph_inode_info *ci = ceph_inode(dir);
+ struct inode *inode;
+ struct timespec64 now;
+ struct ceph_vino vino = { .ino = req->r_deleg_ino,
+ .snap = CEPH_NOSNAP };
+
+ ktime_get_real_ts64(&now);
+
+ inode = ceph_get_inode(dentry->d_sb, vino);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ /* If we can't get a buffer, just carry on */
+ iinfo.xattr_data = kzalloc(4, GFP_NOFS);
+ if (iinfo.xattr_data)
+ iinfo.xattr_len = 4;
+
+ iinfo.inline_version = CEPH_INLINE_NONE;
+ iinfo.change_attr = 1;
+ ceph_encode_timespec64(&iinfo.btime, &now);
+
+ in.ino = cpu_to_le64(vino.ino);
+ in.snapid = cpu_to_le64(CEPH_NOSNAP);
+ in.version = cpu_to_le64(1); // ???
+ in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE);
+ in.cap.cap_id = cpu_to_le64(1);
+ in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino);
+ in.cap.flags = CEPH_CAP_FLAG_AUTH;
+ in.ctime = in.mtime = in.atime = iinfo.btime;
+ in.mode = cpu_to_le32((u32)mode);
+ in.truncate_seq = cpu_to_le32(1);
+ in.truncate_size = cpu_to_le64(ci->i_truncate_size);
+ in.max_size = cpu_to_le64(ci->i_max_size);
+ in.xattr_version = cpu_to_le64(1);
+ in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid()));
+ in.gid = cpu_to_le32(from_kgid(&init_user_ns, current_fsgid()));
+ in.nlink = cpu_to_le32(1);
+
+ ceph_file_layout_to_legacy(&ci->i_layout, &in.layout);
+
+ ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session,
+ req->r_fmode, NULL);
+ if (ret) {
+ dout("%s failed to fill inode: %d\n", __func__, ret);
+ if (inode->i_state & I_NEW)
+ discard_new_inode(inode);
+ } else {
+ struct dentry *dn;
+
+ dout("%s d_adding new inode 0x%llx to 0x%lx/%s\n", __func__,
+ vino.ino, dir->i_ino, dentry->d_name.name);
+ ceph_dir_clear_ordered(dir);
+ ceph_init_inode_acls(inode, as_ctx);
+ if (inode->i_state & I_NEW)
+ unlock_new_inode(inode);
+ if (d_in_lookup(dentry) || d_really_is_negative(dentry)) {
+ if (!d_unhashed(dentry))
+ d_drop(dentry);
+ dn = d_splice_alias(inode, dentry);
+ WARN_ON_ONCE(dn && dn != dentry);
+ }
+ file->f_mode |= FMODE_CREATED;
+ ret = finish_open(file, dentry, ceph_open);
+ }
+ return ret;
+}
+
/*
* Do a lookup + open with a single request. If we get a non-existent
* file or symlink, return 1 so the VFS can retry.
struct ceph_mds_request *req;
struct dentry *dn;
struct ceph_acl_sec_ctx as_ctx = {};
+ bool try_async = enable_async_dirops;
int mask;
int err;
return -ENOENT;
}
+retry:
/* do the open */
req = prepare_open_request(dir->i_sb, flags, mode);
if (IS_ERR(req)) {
}
req->r_dentry = dget(dentry);
req->r_num_caps = 2;
+ mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
+ if (ceph_security_xattr_wanted(dir))
+ mask |= CEPH_CAP_XATTR_SHARED;
+ req->r_args.open.mask = cpu_to_le32(mask);
+ req->r_parent = dir;
+
if (flags & O_CREAT) {
req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL;
req->r_dentry_unless = CEPH_CAP_FILE_EXCL;
req->r_pagelist = as_ctx.pagelist;
as_ctx.pagelist = NULL;
}
+ if (try_async && get_caps_for_async_create(dir, dentry)) {
+ set_bit(CEPH_MDS_R_DELEG_INO, &req->r_req_flags);
+ req->r_callback = ceph_async_create_cb;
+ err = ceph_mdsc_submit_request(mdsc, dir, req);
+ switch (err) {
+ case 0:
+ /* set up inode, dentry and return */
+ err = ceph_finish_async_open(dir, dentry, file,
+ mode, req, &as_ctx);
+ goto out_req;
+ case -ECHILD:
+ /* do a sync create */
+ try_async = false;
+ as_ctx.pagelist = req->r_pagelist;
+ req->r_pagelist = NULL;
+ ceph_mdsc_put_request(req);
+ goto retry;
+ default:
+ /* Hard error, give up */
+ goto out_req;
+ }
+ }
}
- mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED;
- if (ceph_security_xattr_wanted(dir))
- mask |= CEPH_CAP_XATTR_SHARED;
- req->r_args.open.mask = cpu_to_le32(mask);
-
- req->r_parent = dir;
set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
err = ceph_mdsc_do_request(mdsc,
(flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
req);
err = ceph_handle_snapdir(req, dentry, err);
if (err)
- goto out_req;
+ goto out_fmode;
if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
err = ceph_handle_notrace_create(dir, dentry);
dn = NULL;
}
if (err)
- goto out_req;
+ goto out_fmode;
if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) {
/* make vfs retry on splice, ENOENT, or symlink */
dout("atomic_open finish_no_open on dn %p\n", dn);
}
err = finish_open(file, dentry, ceph_open);
}
-out_req:
+out_fmode:
if (!req->r_err && req->r_target_inode)
ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode);
+out_req:
ceph_mdsc_put_request(req);
out_ctx:
ceph_release_acl_sec_ctx(&as_ctx);
projects / ceph-client.git / commitdiff