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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113// SPDX-License-Identifier: GPL-2.0-only/* * Ceph cache definitions. * * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. * Written by Milosz Tanski (milosz@adfin.com) */
#include <linux/ceph/ceph_debug.h>
#include <linux/fs_context.h>#include "super.h"#include "cache.h"
void ceph_fscache_register_inode_cookie(struct inode *inode){ struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
/* No caching for filesystem? */ if (!fsc->fscache) return;
/* Regular files only */ if (!S_ISREG(inode->i_mode)) return;
/* Only new inodes! */ if (!(inode_state_read_once(inode) & I_NEW)) return;
WARN_ON_ONCE(ci->netfs.cache);
ci->netfs.cache = fscache_acquire_cookie(fsc->fscache, 0, &ci->i_vino, sizeof(ci->i_vino), &ci->i_version, sizeof(ci->i_version), i_size_read(inode)); if (ci->netfs.cache) mapping_set_release_always(inode->i_mapping);}
void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info *ci){ fscache_relinquish_cookie(ceph_fscache_cookie(ci), false);}
void ceph_fscache_use_cookie(struct inode *inode, bool will_modify){ struct ceph_inode_info *ci = ceph_inode(inode);
fscache_use_cookie(ceph_fscache_cookie(ci), will_modify);}
void ceph_fscache_unuse_cookie(struct inode *inode, bool update){ struct ceph_inode_info *ci = ceph_inode(inode);
if (update) { loff_t i_size = i_size_read(inode);
fscache_unuse_cookie(ceph_fscache_cookie(ci), &ci->i_version, &i_size); } else { fscache_unuse_cookie(ceph_fscache_cookie(ci), NULL, NULL); }}
void ceph_fscache_update(struct inode *inode){ struct ceph_inode_info *ci = ceph_inode(inode); loff_t i_size = i_size_read(inode);
fscache_update_cookie(ceph_fscache_cookie(ci), &ci->i_version, &i_size);}
void ceph_fscache_invalidate(struct inode *inode, bool dio_write){ struct ceph_inode_info *ci = ceph_inode(inode);
fscache_invalidate(ceph_fscache_cookie(ci), &ci->i_version, i_size_read(inode), dio_write ? FSCACHE_INVAL_DIO_WRITE : 0);}
int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc){ const struct ceph_fsid *fsid = &fsc->client->fsid; const char *fscache_uniq = fsc->mount_options->fscache_uniq; size_t uniq_len = fscache_uniq ? strlen(fscache_uniq) : 0; char *name; int err = 0;
name = kasprintf(GFP_KERNEL, "ceph,%pU%s%s", fsid, uniq_len ? "," : "", uniq_len ? fscache_uniq : ""); if (!name) return -ENOMEM;
fsc->fscache = fscache_acquire_volume(name, NULL, NULL, 0); if (IS_ERR_OR_NULL(fsc->fscache)) { errorfc(fc, "Unable to register fscache cookie for %s", name); err = fsc->fscache ? PTR_ERR(fsc->fscache) : -EOPNOTSUPP; fsc->fscache = NULL; } kfree(name); return err;}
void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc){ fscache_relinquish_volume(fsc->fscache, NULL, false);}