if CEPH_FS
config CEPH_FSCACHE
bool "Enable Ceph client caching support"
- depends on CEPH_FS=m && FSCACHE_OLD_API || CEPH_FS=y && FSCACHE_OLD_API=y
+ depends on CEPH_FS=m && FSCACHE || CEPH_FS=y && FSCACHE=y
help
Choose Y here to enable persistent, read-only local
caching support for Ceph clients using FS-Cache
BUG_ON(PagePrivate(page));
attach_page_private(page, snapc);
- return __set_page_dirty_nobuffers(page);
+ return ceph_fscache_set_page_dirty(page);
}
/*
struct ceph_inode_info *ci;
struct ceph_snap_context *snapc;
- wait_on_page_fscache(page);
-
inode = page->mapping->host;
ci = ceph_inode(inode);
}
WARN_ON(!PageLocked(page));
- if (!PagePrivate(page))
- return;
+ if (PagePrivate(page)) {
+ dout("%p invalidatepage %p idx %lu full dirty page\n",
+ inode, page, page->index);
- dout("%p invalidatepage %p idx %lu full dirty page\n",
- inode, page, page->index);
+ snapc = detach_page_private(page);
+ ceph_put_wrbuffer_cap_refs(ci, 1, snapc);
+ ceph_put_snap_context(snapc);
+ }
- snapc = detach_page_private(page);
- ceph_put_wrbuffer_cap_refs(ci, 1, snapc);
- ceph_put_snap_context(snapc);
+ wait_on_page_fscache(page);
}
static int ceph_releasepage(struct page *page, gfp_t gfp)
{
- dout("%p releasepage %p idx %lu (%sdirty)\n", page->mapping->host,
- page, page->index, PageDirty(page) ? "" : "not ");
+ struct inode *inode = page->mapping->host;
+
+ dout("%llx:%llx releasepage %p idx %lu (%sdirty)\n",
+ ceph_vinop(inode), page,
+ page->index, PageDirty(page) ? "" : "not ");
+
+ if (PagePrivate(page))
+ return 0;
if (PageFsCache(page)) {
- if (!(gfp & __GFP_DIRECT_RECLAIM) || !(gfp & __GFP_FS))
+ if (!gfpflags_allow_blocking(gfp) || !(gfp & __GFP_FS))
return 0;
wait_on_page_fscache(page);
}
- return !PagePrivate(page);
+ ceph_fscache_note_page_release(inode);
+ return 1;
}
static void ceph_netfs_expand_readahead(struct netfs_read_request *rreq)
#include "super.h"
#include "cache.h"
-struct fscache_netfs ceph_cache_netfs = {
- .name = "ceph",
- .version = 0,
-};
-
-static DEFINE_MUTEX(ceph_fscache_lock);
-static LIST_HEAD(ceph_fscache_list);
-
-struct ceph_fscache_entry {
- struct list_head list;
- struct fscache_cookie *fscache;
- size_t uniq_len;
- /* The following members must be last */
- struct ceph_fsid fsid;
- char uniquifier[];
-};
-
-static const struct fscache_cookie_def ceph_fscache_fsid_object_def = {
- .name = "CEPH.fsid",
- .type = FSCACHE_COOKIE_TYPE_INDEX,
-};
-
-int __init ceph_fscache_register(void)
-{
- return fscache_register_netfs(&ceph_cache_netfs);
-}
-
-void ceph_fscache_unregister(void)
-{
- fscache_unregister_netfs(&ceph_cache_netfs);
-}
-
-int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
+void ceph_fscache_register_inode_cookie(struct inode *inode)
{
- 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;
- struct ceph_fscache_entry *ent;
- int err = 0;
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
- mutex_lock(&ceph_fscache_lock);
- list_for_each_entry(ent, &ceph_fscache_list, list) {
- if (memcmp(&ent->fsid, fsid, sizeof(*fsid)))
- continue;
- if (ent->uniq_len != uniq_len)
- continue;
- if (uniq_len && memcmp(ent->uniquifier, fscache_uniq, uniq_len))
- continue;
-
- errorfc(fc, "fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
- fsid);
- err = -EBUSY;
- goto out_unlock;
- }
+ /* No caching for filesystem? */
+ if (!fsc->fscache)
+ return;
- ent = kzalloc(sizeof(*ent) + uniq_len, GFP_KERNEL);
- if (!ent) {
- err = -ENOMEM;
- goto out_unlock;
- }
+ /* Regular files only */
+ if (!S_ISREG(inode->i_mode))
+ return;
- memcpy(&ent->fsid, fsid, sizeof(*fsid));
- if (uniq_len > 0) {
- memcpy(&ent->uniquifier, fscache_uniq, uniq_len);
- ent->uniq_len = uniq_len;
- }
+ /* Only new inodes! */
+ if (!(inode->i_state & I_NEW))
+ return;
- fsc->fscache = fscache_acquire_cookie(ceph_cache_netfs.primary_index,
- &ceph_fscache_fsid_object_def,
- &ent->fsid, sizeof(ent->fsid) + uniq_len,
- NULL, 0,
- fsc, 0, true);
+ WARN_ON_ONCE(ci->fscache);
- if (fsc->fscache) {
- ent->fscache = fsc->fscache;
- list_add_tail(&ent->list, &ceph_fscache_list);
- } else {
- kfree(ent);
- errorfc(fc, "unable to register fscache cookie for fsid %pU",
- fsid);
- /* all other fs ignore this error */
- }
-out_unlock:
- mutex_unlock(&ceph_fscache_lock);
- return err;
+ ci->fscache = fscache_acquire_cookie(fsc->fscache, 0,
+ &ci->i_vino, sizeof(ci->i_vino),
+ &ci->i_version, sizeof(ci->i_version),
+ i_size_read(inode));
}
-static enum fscache_checkaux ceph_fscache_inode_check_aux(
- void *cookie_netfs_data, const void *data, uint16_t dlen,
- loff_t object_size)
+void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
{
- struct ceph_inode_info* ci = cookie_netfs_data;
- struct inode* inode = &ci->vfs_inode;
+ struct fscache_cookie *cookie = ci->fscache;
- if (dlen != sizeof(ci->i_version) ||
- i_size_read(inode) != object_size)
- return FSCACHE_CHECKAUX_OBSOLETE;
+ fscache_relinquish_cookie(cookie, false);
+}
- if (*(u64 *)data != ci->i_version)
- return FSCACHE_CHECKAUX_OBSOLETE;
+void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
- dout("ceph inode 0x%p cached okay\n", ci);
- return FSCACHE_CHECKAUX_OKAY;
+ fscache_use_cookie(ci->fscache, will_modify);
}
-static const struct fscache_cookie_def ceph_fscache_inode_object_def = {
- .name = "CEPH.inode",
- .type = FSCACHE_COOKIE_TYPE_DATAFILE,
- .check_aux = ceph_fscache_inode_check_aux,
-};
-
-void ceph_fscache_register_inode_cookie(struct inode *inode)
+void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
{
struct ceph_inode_info *ci = ceph_inode(inode);
- struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
-
- /* No caching for filesystem */
- if (!fsc->fscache)
- return;
- /* Only cache for regular files that are read only */
- if (!S_ISREG(inode->i_mode))
- return;
+ if (update) {
+ loff_t i_size = i_size_read(inode);
- inode_lock_nested(inode, I_MUTEX_CHILD);
- if (!ci->fscache) {
- ci->fscache = fscache_acquire_cookie(fsc->fscache,
- &ceph_fscache_inode_object_def,
- &ci->i_vino, sizeof(ci->i_vino),
- &ci->i_version, sizeof(ci->i_version),
- ci, i_size_read(inode), false);
+ fscache_unuse_cookie(ci->fscache, &ci->i_version, &i_size);
+ } else {
+ fscache_unuse_cookie(ci->fscache, NULL, NULL);
}
- inode_unlock(inode);
}
-void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
+void ceph_fscache_update(struct inode *inode)
{
- struct fscache_cookie* cookie;
-
- if ((cookie = ci->fscache) == NULL)
- return;
-
- ci->fscache = NULL;
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ loff_t i_size = i_size_read(inode);
- fscache_relinquish_cookie(cookie, &ci->i_vino, false);
+ fscache_update_cookie(ci->fscache, &ci->i_version, &i_size);
}
-static bool ceph_fscache_can_enable(void *data)
+void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
{
- struct inode *inode = data;
- return !inode_is_open_for_write(inode);
+ struct ceph_inode_info *ci = ceph_inode(inode);
+
+ fscache_invalidate(ceph_inode(inode)->fscache,
+ &ci->i_version, i_size_read(inode),
+ dio_write ? FSCACHE_INVAL_DIO_WRITE : 0);
}
-void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp)
+int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
{
- struct ceph_inode_info *ci = ceph_inode(inode);
+ 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;
- if (!fscache_cookie_valid(ci->fscache))
- return;
+ name = kasprintf(GFP_KERNEL, "ceph,%pU%s%s", fsid, uniq_len ? "," : "",
+ uniq_len ? fscache_uniq : "");
+ if (!name)
+ return -ENOMEM;
- if (inode_is_open_for_write(inode)) {
- dout("fscache_file_set_cookie %p %p disabling cache\n",
- inode, filp);
- fscache_disable_cookie(ci->fscache, &ci->i_vino, false);
- } else {
- fscache_enable_cookie(ci->fscache, &ci->i_vino, i_size_read(inode),
- ceph_fscache_can_enable, inode);
- if (fscache_cookie_enabled(ci->fscache)) {
- dout("fscache_file_set_cookie %p %p enabling cache\n",
- inode, filp);
- }
+ 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)
{
- if (fscache_cookie_valid(fsc->fscache)) {
- struct ceph_fscache_entry *ent;
- bool found = false;
-
- mutex_lock(&ceph_fscache_lock);
- list_for_each_entry(ent, &ceph_fscache_list, list) {
- if (ent->fscache == fsc->fscache) {
- list_del(&ent->list);
- kfree(ent);
- found = true;
- break;
- }
- }
- WARN_ON_ONCE(!found);
- mutex_unlock(&ceph_fscache_lock);
-
- __fscache_relinquish_cookie(fsc->fscache, NULL, false);
- }
- fsc->fscache = NULL;
+ fscache_relinquish_volume(fsc->fscache, NULL, false);
}
#include <linux/netfs.h>
#ifdef CONFIG_CEPH_FSCACHE
-
-extern struct fscache_netfs ceph_cache_netfs;
-
-int ceph_fscache_register(void);
-void ceph_fscache_unregister(void);
+#include <linux/fscache.h>
int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
void ceph_fscache_register_inode_cookie(struct inode *inode);
void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
-void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);
-void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
+
+void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
+void ceph_fscache_unuse_cookie(struct inode *inode, bool update);
+
+void ceph_fscache_update(struct inode *inode);
+void ceph_fscache_invalidate(struct inode *inode, bool dio_write);
static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
{
return ci->fscache;
}
-static inline void ceph_fscache_invalidate(struct inode *inode)
+static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
{
- fscache_invalidate(ceph_inode(inode)->fscache);
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ struct fscache_cookie *cookie = ceph_fscache_cookie(ci);
+
+ if (cookie) {
+ ceph_fscache_use_cookie(inode, true);
+ fscache_resize_cookie(cookie, to);
+ ceph_fscache_unuse_cookie(inode, true);
+ }
}
-static inline bool ceph_is_cache_enabled(struct inode *inode)
+static inline void ceph_fscache_unpin_writeback(struct inode *inode,
+ struct writeback_control *wbc)
{
- struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode));
+ fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode)));
+}
+
+static inline int ceph_fscache_set_page_dirty(struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ struct ceph_inode_info *ci = ceph_inode(inode);
- if (!cookie)
- return false;
- return fscache_cookie_enabled(cookie);
+ return fscache_set_page_dirty(page, ceph_fscache_cookie(ci));
}
static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
{
struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
- return fscache_begin_read_operation(rreq, cookie);
+ return fscache_begin_read_operation(&rreq->cache_resources, cookie);
}
-#else
-static inline int ceph_fscache_register(void)
+static inline bool ceph_is_cache_enabled(struct inode *inode)
{
- return 0;
+ return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
}
-static inline void ceph_fscache_unregister(void)
+static inline void ceph_fscache_note_page_release(struct inode *inode)
{
-}
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ fscache_note_page_release(ceph_fscache_cookie(ci));
+}
+#else /* CONFIG_CEPH_FSCACHE */
static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
struct fs_context *fc)
{
{
}
-static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
+static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
{
- return NULL;
}
-static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
+static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
{
}
-static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
+static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
{
}
-static inline void ceph_fscache_file_set_cookie(struct inode *inode,
- struct file *filp)
+static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
{
}
-static inline void ceph_fscache_invalidate(struct inode *inode)
+static inline void ceph_fscache_update(struct inode *inode)
{
}
+static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
+{
+}
+
+static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
+{
+ return NULL;
+}
+
+static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
+{
+}
+
+static inline void ceph_fscache_unpin_writeback(struct inode *inode,
+ struct writeback_control *wbc)
+{
+}
+
+static inline int ceph_fscache_set_page_dirty(struct page *page)
+{
+ return __set_page_dirty_nobuffers(page);
+}
+
static inline bool ceph_is_cache_enabled(struct inode *inode)
{
return false;
{
return -ENOBUFS;
}
-#endif
-#endif /* _CEPH_CACHE_H */
+static inline void ceph_fscache_note_page_release(struct inode *inode)
+{
+}
+#endif /* CONFIG_CEPH_FSCACHE */
+
+#endif
u32 invalidating_gen = ci->i_rdcache_gen;
spin_unlock(&ci->i_ceph_lock);
- ceph_fscache_invalidate(inode);
+ ceph_fscache_invalidate(inode, false);
invalidate_mapping_pages(&inode->i_data, 0, -1);
spin_lock(&ci->i_ceph_lock);
int wait = (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync);
dout("write_inode %p wait=%d\n", inode, wait);
+ ceph_fscache_unpin_writeback(inode, wbc);
if (wait) {
dirty = try_flush_caps(inode, &flush_tid);
if (dirty)
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
- ceph_fscache_register_inode_cookie(inode);
- ceph_fscache_file_set_cookie(inode, file);
+ ceph_fscache_use_cookie(inode, file->f_mode & FMODE_WRITE);
fallthrough;
case S_IFDIR:
ret = ceph_init_file_info(inode, file, fmode,
dout("release inode %p regular file %p\n", inode, file);
WARN_ON(!list_empty(&fi->rw_contexts));
+ ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE);
ceph_put_fmode(ci, fi->fmode, 1);
kmem_cache_free(ceph_file_cachep, fi);
snapc, snapc ? snapc->seq : 0);
if (write) {
- int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
+ int ret2;
+
+ ceph_fscache_invalidate(inode, true);
+
+ ret2 = invalidate_inode_pages2_range(inode->i_mapping,
pos >> PAGE_SHIFT,
(pos + count - 1) >> PAGE_SHIFT);
if (ret2 < 0)
if (ret < 0)
return ret;
+ ceph_fscache_invalidate(inode, false);
ret = invalidate_inode_pages2_range(inode->i_mapping,
pos >> PAGE_SHIFT,
(pos + count - 1) >> PAGE_SHIFT);
goto unlock;
filemap_invalidate_lock(inode->i_mapping);
+ ceph_fscache_invalidate(inode, false);
ceph_zero_pagecache_range(inode, offset, length);
ret = ceph_zero_objects(inode, offset, length);
goto out_caps;
/* Drop dst file cached pages */
+ ceph_fscache_invalidate(dst_inode, false);
ret = invalidate_inode_pages2_range(dst_inode->i_mapping,
dst_off >> PAGE_SHIFT,
(dst_off + len) >> PAGE_SHIFT);
percpu_counter_dec(&mdsc->metric.total_inodes);
truncate_inode_pages_final(&inode->i_data);
+ if (inode->i_state & I_PINNING_FSCACHE_WB)
+ ceph_fscache_unuse_cookie(inode, true);
clear_inode(inode);
ceph_fscache_unregister_inode_cookie(ci);
}
i_size_write(inode, size);
inode->i_blocks = calc_inode_blocks(size);
+ /*
+ * If we're expanding, then we should be able to just update
+ * the existing cookie.
+ */
+ if (size > isize)
+ ceph_fscache_update(inode);
ci->i_reported_size = size;
if (truncate_seq != ci->i_truncate_seq) {
dout("truncate_seq %u -> %u\n",
truncate_size);
ci->i_truncate_size = truncate_size;
}
-
- if (queue_trunc)
- ceph_fscache_invalidate(inode);
-
return queue_trunc;
}
spin_unlock(&ci->i_ceph_lock);
+ ceph_fscache_register_inode_cookie(inode);
+
if (fill_inline)
ceph_fill_inline_data(inode, locked_page,
iinfo->inline_data, iinfo->inline_len);
spin_lock(&ci->i_ceph_lock);
dout("set_size %p %llu -> %llu\n", inode, i_size_read(inode), size);
i_size_write(inode, size);
+ ceph_fscache_update(inode);
inode->i_blocks = calc_inode_blocks(size);
ret = __ceph_should_report_size(ci);
spin_unlock(&ci->i_ceph_lock);
+
return ret;
}
u32 orig_gen;
int check = 0;
+ ceph_fscache_invalidate(inode, false);
+
mutex_lock(&ci->i_truncate_mutex);
if (ceph_inode_is_shutdown(inode)) {
orig_gen = ci->i_rdcache_gen;
spin_unlock(&ci->i_ceph_lock);
- ceph_fscache_invalidate(inode);
+ ceph_fscache_invalidate(inode, false);
if (invalidate_inode_pages2(inode->i_mapping) < 0) {
pr_err("invalidate_inode_pages2 %llx.%llx failed\n",
ceph_vinop(inode));
ci->i_truncate_pending, to);
spin_unlock(&ci->i_ceph_lock);
+ ceph_fscache_resize(inode, to);
truncate_pagecache(inode, to);
spin_lock(&ci->i_ceph_lock);
if (inode_dirty_flags)
__mark_inode_dirty(inode, inode_dirty_flags);
-
if (mask) {
req->r_inode = inode;
ihold(inode);
if (!ceph_wb_pagevec_pool)
goto bad_pagevec_pool;
- error = ceph_fscache_register();
- if (error)
- goto bad_fscache;
-
return 0;
-bad_fscache:
- kmem_cache_destroy(ceph_mds_request_cachep);
bad_pagevec_pool:
- mempool_destroy(ceph_wb_pagevec_pool);
+ kmem_cache_destroy(ceph_mds_request_cachep);
bad_mds_req:
kmem_cache_destroy(ceph_dir_file_cachep);
bad_dir_file:
kmem_cache_destroy(ceph_dir_file_cachep);
kmem_cache_destroy(ceph_mds_request_cachep);
mempool_destroy(ceph_wb_pagevec_pool);
-
- ceph_fscache_unregister();
}
static void __ceph_umount_begin(struct ceph_fs_client *fsc)
#include <linux/ceph/libceph.h>
#ifdef CONFIG_CEPH_FSCACHE
-#define FSCACHE_USE_NEW_IO_API
#include <linux/fscache.h>
#endif
#endif
#ifdef CONFIG_CEPH_FSCACHE
- struct fscache_cookie *fscache;
+ struct fscache_volume *fscache;
#endif
};
projects / platform / kernel / linux-rpi.git / commitdiff