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110 lines
2.8 KiB
110 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Ceph cache definitions. |
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* |
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* Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. |
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* Written by Milosz Tanski ([email protected]) |
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*/ |
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#include <linux/ceph/ceph_debug.h> |
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#include <linux/fs_context.h> |
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#include "super.h" |
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#include "cache.h" |
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void ceph_fscache_register_inode_cookie(struct inode *inode) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
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/* No caching for filesystem? */ |
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if (!fsc->fscache) |
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return; |
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/* Regular files only */ |
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if (!S_ISREG(inode->i_mode)) |
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return; |
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/* Only new inodes! */ |
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if (!(inode->i_state & I_NEW)) |
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return; |
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WARN_ON_ONCE(ci->netfs.cache); |
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ci->netfs.cache = |
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fscache_acquire_cookie(fsc->fscache, 0, |
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&ci->i_vino, sizeof(ci->i_vino), |
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&ci->i_version, sizeof(ci->i_version), |
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i_size_read(inode)); |
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} |
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void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info *ci) |
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{ |
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fscache_relinquish_cookie(ceph_fscache_cookie(ci), false); |
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} |
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void ceph_fscache_use_cookie(struct inode *inode, bool will_modify) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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fscache_use_cookie(ceph_fscache_cookie(ci), will_modify); |
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} |
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void ceph_fscache_unuse_cookie(struct inode *inode, bool update) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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if (update) { |
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loff_t i_size = i_size_read(inode); |
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fscache_unuse_cookie(ceph_fscache_cookie(ci), |
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&ci->i_version, &i_size); |
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} else { |
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fscache_unuse_cookie(ceph_fscache_cookie(ci), NULL, NULL); |
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} |
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} |
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void ceph_fscache_update(struct inode *inode) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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loff_t i_size = i_size_read(inode); |
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fscache_update_cookie(ceph_fscache_cookie(ci), &ci->i_version, &i_size); |
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} |
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void ceph_fscache_invalidate(struct inode *inode, bool dio_write) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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fscache_invalidate(ceph_fscache_cookie(ci), |
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&ci->i_version, i_size_read(inode), |
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dio_write ? FSCACHE_INVAL_DIO_WRITE : 0); |
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} |
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int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc) |
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{ |
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const struct ceph_fsid *fsid = &fsc->client->fsid; |
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const char *fscache_uniq = fsc->mount_options->fscache_uniq; |
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size_t uniq_len = fscache_uniq ? strlen(fscache_uniq) : 0; |
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char *name; |
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int err = 0; |
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name = kasprintf(GFP_KERNEL, "ceph,%pU%s%s", fsid, uniq_len ? "," : "", |
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uniq_len ? fscache_uniq : ""); |
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if (!name) |
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return -ENOMEM; |
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fsc->fscache = fscache_acquire_volume(name, NULL, NULL, 0); |
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if (IS_ERR_OR_NULL(fsc->fscache)) { |
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errorfc(fc, "Unable to register fscache cookie for %s", name); |
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err = fsc->fscache ? PTR_ERR(fsc->fscache) : -EOPNOTSUPP; |
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fsc->fscache = NULL; |
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} |
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kfree(name); |
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return err; |
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} |
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void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
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{ |
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fscache_relinquish_volume(fsc->fscache, NULL, false); |
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}
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