1 // SPDX-License-Identifier: GPL-2.0-only
3 * Ceph cache definitions.
5 * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
6 * Written by Milosz Tanski (milosz@adfin.com)
9 #include <linux/ceph/ceph_debug.h>
11 #include <linux/fs_context.h>
15 void ceph_fscache_register_inode_cookie(struct inode *inode)
17 struct ceph_inode_info *ci = ceph_inode(inode);
18 struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
20 /* No caching for filesystem? */
24 /* Regular files only */
25 if (!S_ISREG(inode->i_mode))
28 /* Only new inodes! */
29 if (!(inode->i_state & I_NEW))
32 WARN_ON_ONCE(ci->fscache);
34 ci->fscache = fscache_acquire_cookie(fsc->fscache, 0,
35 &ci->i_vino, sizeof(ci->i_vino),
36 &ci->i_version, sizeof(ci->i_version),
40 void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
42 struct fscache_cookie *cookie = ci->fscache;
44 fscache_relinquish_cookie(cookie, false);
47 void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
49 struct ceph_inode_info *ci = ceph_inode(inode);
51 fscache_use_cookie(ci->fscache, will_modify);
54 void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
56 struct ceph_inode_info *ci = ceph_inode(inode);
59 loff_t i_size = i_size_read(inode);
61 fscache_unuse_cookie(ci->fscache, &ci->i_version, &i_size);
63 fscache_unuse_cookie(ci->fscache, NULL, NULL);
67 void ceph_fscache_update(struct inode *inode)
69 struct ceph_inode_info *ci = ceph_inode(inode);
70 loff_t i_size = i_size_read(inode);
72 fscache_update_cookie(ci->fscache, &ci->i_version, &i_size);
75 void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
77 struct ceph_inode_info *ci = ceph_inode(inode);
79 fscache_invalidate(ceph_inode(inode)->fscache,
80 &ci->i_version, i_size_read(inode),
81 dio_write ? FSCACHE_INVAL_DIO_WRITE : 0);
84 int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
86 const struct ceph_fsid *fsid = &fsc->client->fsid;
87 const char *fscache_uniq = fsc->mount_options->fscache_uniq;
88 size_t uniq_len = fscache_uniq ? strlen(fscache_uniq) : 0;
92 name = kasprintf(GFP_KERNEL, "ceph,%pU%s%s", fsid, uniq_len ? "," : "",
93 uniq_len ? fscache_uniq : "");
97 fsc->fscache = fscache_acquire_volume(name, NULL, NULL, 0);
98 if (IS_ERR_OR_NULL(fsc->fscache)) {
99 errorfc(fc, "Unable to register fscache cookie for %s", name);
100 err = fsc->fscache ? PTR_ERR(fsc->fscache) : -EOPNOTSUPP;
107 void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
109 fscache_relinquish_volume(fsc->fscache, NULL, false);