*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2012, Joyent, Inc. All rights reserved.
+ * Copyright 2014 HybridCluster. All rights reserved.
+ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
+ * Copyright 2013 Saso Kiselkov. All rights reserved.
*/
/* Portions Copyright 2010 Robert Milkowski */
* dmu_spa.h.
*/
+#include <sys/zfs_context.h>
#include <sys/inttypes.h>
-#include <sys/types.h>
-#include <sys/param.h>
#include <sys/cred.h>
-#include <sys/time.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio_compress.h>
+#include <sys/zio_priority.h>
#include <sys/uio.h>
#ifdef __cplusplus
struct dnode;
struct drr_begin;
struct drr_end;
-struct zbookmark;
+struct zbookmark_phys;
struct spa;
struct nvlist;
struct arc_buf;
typedef struct objset objset_t;
typedef struct dmu_tx dmu_tx_t;
typedef struct dsl_dir dsl_dir_t;
+typedef struct dnode dnode_t;
typedef enum dmu_object_byteswap {
DMU_BSWAP_UINT8,
((ot) & DMU_OT_METADATA) : \
dmu_ot[(int)(ot)].ot_metadata)
+/*
+ * These object types use bp_fill != 1 for their L0 bp's. Therefore they can't
+ * have their data embedded (i.e. use a BP_IS_EMBEDDED() bp), because bp_fill
+ * is repurposed for embedded BPs.
+ */
+#define DMU_OT_HAS_FILL(ot) \
+ ((ot) == DMU_OT_DNODE || (ot) == DMU_OT_OBJSET)
+
#define DMU_OT_BYTESWAP(ot) (((ot) & DMU_OT_NEWTYPE) ? \
((ot) & DMU_OT_BYTESWAP_MASK) : \
dmu_ot[(int)(ot)].ot_byteswap)
DMU_OTN_ZAP_METADATA = DMU_OT(DMU_BSWAP_ZAP, B_TRUE),
} dmu_object_type_t;
-typedef enum dmu_objset_type {
- DMU_OST_NONE,
- DMU_OST_META,
- DMU_OST_ZFS,
- DMU_OST_ZVOL,
- DMU_OST_OTHER, /* For testing only! */
- DMU_OST_ANY, /* Be careful! */
- DMU_OST_NUMTYPES
-} dmu_objset_type_t;
+/*
+ * These flags are intended to be used to specify the "txg_how"
+ * parameter when calling the dmu_tx_assign() function. See the comment
+ * above dmu_tx_assign() for more details on the meaning of these flags.
+ */
+#define TXG_NOWAIT (0ULL)
+#define TXG_WAIT (1ULL<<0)
+#define TXG_NOTHROTTLE (1ULL<<1)
void byteswap_uint64_array(void *buf, size_t size);
void byteswap_uint32_array(void *buf, size_t size);
#define DS_FIND_SNAPSHOTS (1<<0)
#define DS_FIND_CHILDREN (1<<1)
+#define DS_FIND_SERIALIZE (1<<2)
/*
* The maximum number of bytes that can be accessed as part of one
* operation, including metadata.
*/
-#define DMU_MAX_ACCESS (10<<20) /* 10MB */
+#define DMU_MAX_ACCESS (64 * 1024 * 1024) /* 64MB */
#define DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */
#define DMU_USERUSED_OBJECT (-1ULL)
#define DMU_GROUPUSED_OBJECT (-2ULL)
-#define DMU_DEADLIST_OBJECT (-3ULL)
+
+/*
+ * Zap prefix for object accounting in DMU_{USER,GROUP}USED_OBJECT.
+ */
+#define DMU_OBJACCT_PREFIX "obj-"
+#define DMU_OBJACCT_PREFIX_LEN 4
/*
* artificial blkids for bonus buffer and spill blocks
void dmu_objset_disown(objset_t *os, void *tag);
int dmu_objset_open_ds(struct dsl_dataset *ds, objset_t **osp);
-int dmu_objset_evict_dbufs(objset_t *os);
+void dmu_objset_evict_dbufs(objset_t *os);
int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
-int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
- uint64_t flags);
-int dmu_objset_destroy(const char *name, boolean_t defer);
-int dmu_snapshots_destroy_nvl(struct nvlist *snaps, boolean_t defer, char *);
-int dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
- struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd);
-int dmu_objset_rename(const char *name, const char *newname,
- boolean_t recursive);
+int dmu_objset_clone(const char *name, const char *origin);
+int dsl_destroy_snapshots_nvl(struct nvlist *snaps, boolean_t defer,
+ struct nvlist *errlist);
+int dmu_objset_snapshot_one(const char *fsname, const char *snapname);
+int dmu_objset_snapshot_tmp(const char *, const char *, int);
int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
int flags);
void dmu_objset_byteswap(void *buf, size_t size);
+int dsl_dataset_rename_snapshot(const char *fsname,
+ const char *oldsnapname, const char *newsnapname, boolean_t recursive);
typedef struct dmu_buf {
uint64_t db_object; /* object that this buffer is part of */
void *db_data; /* data in buffer */
} dmu_buf_t;
-typedef void dmu_buf_evict_func_t(struct dmu_buf *db, void *user_ptr);
-
/*
* The names of zap entries in the DIRECTORY_OBJECT of the MOS.
*/
#define DMU_POOL_FEATURES_FOR_WRITE "features_for_write"
#define DMU_POOL_FEATURES_FOR_READ "features_for_read"
#define DMU_POOL_FEATURE_DESCRIPTIONS "feature_descriptions"
+#define DMU_POOL_FEATURE_ENABLED_TXG "feature_enabled_txg"
#define DMU_POOL_ROOT_DATASET "root_dataset"
#define DMU_POOL_SYNC_BPOBJ "sync_bplist"
#define DMU_POOL_ERRLOG_SCRUB "errlog_scrub"
#define DMU_POOL_SCAN "scan"
#define DMU_POOL_FREE_BPOBJ "free_bpobj"
#define DMU_POOL_BPTREE_OBJ "bptree_obj"
+#define DMU_POOL_EMPTY_BPOBJ "empty_bpobj"
+#define DMU_POOL_CHECKSUM_SALT "org.illumos:checksum_salt"
+#define DMU_POOL_VDEV_ZAP_MAP "com.delphix:vdev_zap_map"
/*
* Allocate an object from this objset. The range of object numbers
*/
uint64_t dmu_object_alloc(objset_t *os, dmu_object_type_t ot,
int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
+uint64_t dmu_object_alloc_dnsize(objset_t *os, dmu_object_type_t ot,
+ int blocksize, dmu_object_type_t bonus_type, int bonus_len,
+ int dnodesize, dmu_tx_t *tx);
int dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
+int dmu_object_claim_dnsize(objset_t *os, uint64_t object, dmu_object_type_t ot,
+ int blocksize, dmu_object_type_t bonus_type, int bonus_len,
+ int dnodesize, dmu_tx_t *tx);
int dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot,
- int blocksize, dmu_object_type_t bonustype, int bonuslen);
+ int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *txp);
+int dmu_object_reclaim_dnsize(objset_t *os, uint64_t object,
+ dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype,
+ int bonuslen, int dnodesize, dmu_tx_t *txp);
/*
* Free an object from this objset.
void dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress,
dmu_tx_t *tx);
+void
+dmu_write_embedded(objset_t *os, uint64_t object, uint64_t offset,
+ void *data, uint8_t etype, uint8_t comp, int uncompressed_size,
+ int compressed_size, int byteorder, dmu_tx_t *tx);
+
/*
* Decide how to write a block: checksum, compression, number of copies, etc.
*/
#define WP_DMU_SYNC 0x2
#define WP_SPILL 0x4
-void dmu_write_policy(objset_t *os, struct dnode *dn, int level, int wp,
+void dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp,
struct zio_prop *zp);
/*
* The bonus data is accessed more or less like a regular buffer.
* read db_data, dmu_buf_will_dirty() before modifying it, and the
* object must be held in an assigned transaction before calling
* dmu_buf_will_dirty. You may use dmu_buf_set_user() on the bonus
- * buffer as well. You must release your hold with dmu_buf_rele().
+ * buffer as well. You must release what you hold with dmu_buf_rele().
+ *
+ * Returns ENOENT, EIO, or 0.
*/
int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **);
int dmu_bonus_max(void);
*/
int dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
-int dmu_spill_hold_by_dnode(struct dnode *dn, uint32_t flags,
+int dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags,
void *tag, dmu_buf_t **dbp);
int dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
* Obtain the DMU buffer from the specified object which contains the
* specified offset. dmu_buf_hold() puts a "hold" on the buffer, so
* that it will remain in memory. You must release the hold with
- * dmu_buf_rele(). You musn't access the dmu_buf_t after releasing your
- * hold. You must have a hold on any dmu_buf_t* you pass to the DMU.
+ * dmu_buf_rele(). You must not access the dmu_buf_t after releasing
+ * what you hold. You must have a hold on any dmu_buf_t* you pass to the DMU.
*
* You must call dmu_buf_read, dmu_buf_will_dirty, or dmu_buf_will_fill
* on the returned buffer before reading or writing the buffer's
*/
int dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
void *tag, dmu_buf_t **, int flags);
+int dmu_buf_hold_by_dnode(dnode_t *dn, uint64_t offset,
+ void *tag, dmu_buf_t **dbp, int flags);
+
+/*
+ * Add a reference to a dmu buffer that has already been held via
+ * dmu_buf_hold() in the current context.
+ */
void dmu_buf_add_ref(dmu_buf_t *db, void* tag);
+
+/*
+ * Attempt to add a reference to a dmu buffer that is in an unknown state,
+ * using a pointer that may have been invalidated by eviction processing.
+ * The request will succeed if the passed in dbuf still represents the
+ * same os/object/blkid, is ineligible for eviction, and has at least
+ * one hold by a user other than the syncer.
+ */
+boolean_t dmu_buf_try_add_ref(dmu_buf_t *, objset_t *os, uint64_t object,
+ uint64_t blkid, void *tag);
+
void dmu_buf_rele(dmu_buf_t *db, void *tag);
uint64_t dmu_buf_refcount(dmu_buf_t *db);
* individually with dmu_buf_rele.
*/
int dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset,
- uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp);
+ uint64_t length, boolean_t read, void *tag,
+ int *numbufsp, dmu_buf_t ***dbpp);
void dmu_buf_rele_array(dmu_buf_t **, int numbufs, void *tag);
+typedef void dmu_buf_evict_func_t(void *user_ptr);
+
+/*
+ * A DMU buffer user object may be associated with a dbuf for the
+ * duration of its lifetime. This allows the user of a dbuf (client)
+ * to attach private data to a dbuf (e.g. in-core only data such as a
+ * dnode_children_t, zap_t, or zap_leaf_t) and be optionally notified
+ * when that dbuf has been evicted. Clients typically respond to the
+ * eviction notification by freeing their private data, thus ensuring
+ * the same lifetime for both dbuf and private data.
+ *
+ * The mapping from a dmu_buf_user_t to any client private data is the
+ * client's responsibility. All current consumers of the API with private
+ * data embed a dmu_buf_user_t as the first member of the structure for
+ * their private data. This allows conversions between the two types
+ * with a simple cast. Since the DMU buf user API never needs access
+ * to the private data, other strategies can be employed if necessary
+ * or convenient for the client (e.g. using container_of() to do the
+ * conversion for private data that cannot have the dmu_buf_user_t as
+ * its first member).
+ *
+ * Eviction callbacks are executed without the dbuf mutex held or any
+ * other type of mechanism to guarantee that the dbuf is still available.
+ * For this reason, users must assume the dbuf has already been freed
+ * and not reference the dbuf from the callback context.
+ *
+ * Users requesting "immediate eviction" are notified as soon as the dbuf
+ * is only referenced by dirty records (dirties == holds). Otherwise the
+ * notification occurs after eviction processing for the dbuf begins.
+ */
+typedef struct dmu_buf_user {
+ /*
+ * Asynchronous user eviction callback state.
+ */
+ taskq_ent_t dbu_tqent;
+
+ /*
+ * This instance's eviction function pointers.
+ *
+ * dbu_evict_func_sync is called synchronously and then
+ * dbu_evict_func_async is executed asynchronously on a taskq.
+ */
+ dmu_buf_evict_func_t *dbu_evict_func_sync;
+ dmu_buf_evict_func_t *dbu_evict_func_async;
+#ifdef ZFS_DEBUG
+ /*
+ * Pointer to user's dbuf pointer. NULL for clients that do
+ * not associate a dbuf with their user data.
+ *
+ * The dbuf pointer is cleared upon eviction so as to catch
+ * use-after-evict bugs in clients.
+ */
+ dmu_buf_t **dbu_clear_on_evict_dbufp;
+#endif
+} dmu_buf_user_t;
+
+/*
+ * Initialize the given dmu_buf_user_t instance with the eviction function
+ * evict_func, to be called when the user is evicted.
+ *
+ * NOTE: This function should only be called once on a given dmu_buf_user_t.
+ * To allow enforcement of this, dbu must already be zeroed on entry.
+ */
+/*ARGSUSED*/
+static inline void
+dmu_buf_init_user(dmu_buf_user_t *dbu, dmu_buf_evict_func_t *evict_func_sync,
+ dmu_buf_evict_func_t *evict_func_async, dmu_buf_t **clear_on_evict_dbufp)
+{
+ ASSERT(dbu->dbu_evict_func_sync == NULL);
+ ASSERT(dbu->dbu_evict_func_async == NULL);
+
+ /* must have at least one evict func */
+ IMPLY(evict_func_sync == NULL, evict_func_async != NULL);
+ dbu->dbu_evict_func_sync = evict_func_sync;
+ dbu->dbu_evict_func_async = evict_func_async;
+ taskq_init_ent(&dbu->dbu_tqent);
+#ifdef ZFS_DEBUG
+ dbu->dbu_clear_on_evict_dbufp = clear_on_evict_dbufp;
+#endif
+}
+
/*
- * Returns NULL on success, or the existing user ptr if it's already
- * been set.
+ * Attach user data to a dbuf and mark it for normal (when the dbuf's
+ * data is cleared or its reference count goes to zero) eviction processing.
*
- * user_ptr is for use by the user and can be obtained via dmu_buf_get_user().
- *
- * user_data_ptr_ptr should be NULL, or a pointer to a pointer which
- * will be set to db->db_data when you are allowed to access it. Note
- * that db->db_data (the pointer) can change when you do dmu_buf_read(),
- * dmu_buf_tryupgrade(), dmu_buf_will_dirty(), or dmu_buf_will_fill().
- * *user_data_ptr_ptr will be set to the new value when it changes.
+ * Returns NULL on success, or the existing user if another user currently
+ * owns the buffer.
+ */
+void *dmu_buf_set_user(dmu_buf_t *db, dmu_buf_user_t *user);
+
+/*
+ * Attach user data to a dbuf and mark it for immediate (its dirty and
+ * reference counts are equal) eviction processing.
*
- * If non-NULL, pageout func will be called when this buffer is being
- * excised from the cache, so that you can clean up the data structure
- * pointed to by user_ptr.
+ * Returns NULL on success, or the existing user if another user currently
+ * owns the buffer.
+ */
+void *dmu_buf_set_user_ie(dmu_buf_t *db, dmu_buf_user_t *user);
+
+/*
+ * Replace the current user of a dbuf.
*
- * dmu_evict_user() will call the pageout func for all buffers in a
- * objset with a given pageout func.
+ * If given the current user of a dbuf, replaces the dbuf's user with
+ * "new_user" and returns the user data pointer that was replaced.
+ * Otherwise returns the current, and unmodified, dbuf user pointer.
*/
-void *dmu_buf_set_user(dmu_buf_t *db, void *user_ptr, void *user_data_ptr_ptr,
- dmu_buf_evict_func_t *pageout_func);
+void *dmu_buf_replace_user(dmu_buf_t *db,
+ dmu_buf_user_t *old_user, dmu_buf_user_t *new_user);
+
/*
- * set_user_ie is the same as set_user, but request immediate eviction
- * when hold count goes to zero.
+ * Remove the specified user data for a DMU buffer.
+ *
+ * Returns the user that was removed on success, or the current user if
+ * another user currently owns the buffer.
*/
-void *dmu_buf_set_user_ie(dmu_buf_t *db, void *user_ptr,
- void *user_data_ptr_ptr, dmu_buf_evict_func_t *pageout_func);
-void *dmu_buf_update_user(dmu_buf_t *db_fake, void *old_user_ptr,
- void *user_ptr, void *user_data_ptr_ptr,
- dmu_buf_evict_func_t *pageout_func);
-void dmu_evict_user(objset_t *os, dmu_buf_evict_func_t *func);
+void *dmu_buf_remove_user(dmu_buf_t *db, dmu_buf_user_t *user);
/*
- * Returns the user_ptr set with dmu_buf_set_user(), or NULL if not set.
+ * Returns the user data (dmu_buf_user_t *) associated with this dbuf.
*/
void *dmu_buf_get_user(dmu_buf_t *db);
+objset_t *dmu_buf_get_objset(dmu_buf_t *db);
+dnode_t *dmu_buf_dnode_enter(dmu_buf_t *db);
+void dmu_buf_dnode_exit(dmu_buf_t *db);
+
+/* Block until any in-progress dmu buf user evictions complete. */
+void dmu_buf_user_evict_wait(void);
+
+/*
+ * Returns the blkptr associated with this dbuf, or NULL if not set.
+ */
+struct blkptr *dmu_buf_get_blkptr(dmu_buf_t *db);
+
/*
* Indicate that you are going to modify the buffer's data (db_data).
*
*/
void dmu_buf_will_dirty(dmu_buf_t *db, dmu_tx_t *tx);
-/*
- * Tells if the given dbuf is freeable.
- */
-boolean_t dmu_buf_freeable(dmu_buf_t *);
-
/*
* You must create a transaction, then hold the objects which you will
* (or might) modify as part of this transaction. Then you must assign
dmu_tx_t *dmu_tx_create(objset_t *os);
void dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
+void dmu_tx_hold_write_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
+ int len);
void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off,
uint64_t len);
+void dmu_tx_hold_free_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
+ uint64_t len);
void dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, const char *name);
+void dmu_tx_hold_zap_by_dnode(dmu_tx_t *tx, dnode_t *dn, int add,
+ const char *name);
void dmu_tx_hold_bonus(dmu_tx_t *tx, uint64_t object);
+void dmu_tx_hold_bonus_by_dnode(dmu_tx_t *tx, dnode_t *dn);
void dmu_tx_hold_spill(dmu_tx_t *tx, uint64_t object);
void dmu_tx_hold_sa(dmu_tx_t *tx, struct sa_handle *hdl, boolean_t may_grow);
void dmu_tx_hold_sa_create(dmu_tx_t *tx, int total_size);
int dmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how);
void dmu_tx_wait(dmu_tx_t *tx);
void dmu_tx_commit(dmu_tx_t *tx);
+void dmu_tx_mark_netfree(dmu_tx_t *tx);
/*
* To register a commit callback, dmu_tx_callback_register() must be called.
* to stable storage and will also be called if the dmu_tx is aborted.
* If there is any error which prevents the transaction from being committed to
* disk, the callback will be called with a value of error != 0.
+ *
+ * When multiple callbacks are registered to the transaction, the callbacks
+ * will be called in reverse order to let Lustre, the only user of commit
+ * callback currently, take the fast path of its commit callback handling.
*/
typedef void dmu_tx_callback_func_t(void *dcb_data, int error);
void dmu_tx_callback_register(dmu_tx_t *tx, dmu_tx_callback_func_t *dcb_func,
void *dcb_data);
+void dmu_tx_do_callbacks(list_t *cb_list, int error);
/*
* Free up the data blocks for a defined range of a file. If size is
uint64_t size, dmu_tx_t *tx);
int dmu_free_long_range(objset_t *os, uint64_t object, uint64_t offset,
uint64_t size);
-int dmu_free_object(objset_t *os, uint64_t object);
+int dmu_free_long_object(objset_t *os, uint64_t object);
/*
* Convenience functions.
#define DMU_READ_NO_PREFETCH 1 /* don't prefetch */
int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf, uint32_t flags);
+int dmu_read_by_dnode(dnode_t *dn, uint64_t offset, uint64_t size, void *buf,
+ uint32_t flags);
void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx);
+void dmu_write_by_dnode(dnode_t *dn, uint64_t offset, uint64_t size,
+ const void *buf, dmu_tx_t *tx);
void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
dmu_tx_t *tx);
#ifdef _KERNEL
#include <linux/blkdev_compat.h>
-int dmu_read_req(objset_t *os, uint64_t object, struct request *req);
-int dmu_write_req(objset_t *os, uint64_t object, struct request *req,
- dmu_tx_t *tx);
int dmu_read_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size);
+int dmu_read_uio_dbuf(dmu_buf_t *zdb, struct uio *uio, uint64_t size);
+int dmu_read_uio_dnode(dnode_t *dn, struct uio *uio, uint64_t size);
int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size,
dmu_tx_t *tx);
int dmu_write_uio_dbuf(dmu_buf_t *zdb, struct uio *uio, uint64_t size,
dmu_tx_t *tx);
+int dmu_write_uio_dnode(dnode_t *dn, struct uio *uio, uint64_t size,
+ dmu_tx_t *tx);
#endif
struct arc_buf *dmu_request_arcbuf(dmu_buf_t *handle, int size);
void dmu_return_arcbuf(struct arc_buf *buf);
void dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, struct arc_buf *buf,
dmu_tx_t *tx);
+#ifdef HAVE_UIO_ZEROCOPY
int dmu_xuio_init(struct xuio *uio, int niov);
void dmu_xuio_fini(struct xuio *uio);
int dmu_xuio_add(struct xuio *uio, struct arc_buf *abuf, offset_t off,
int dmu_xuio_cnt(struct xuio *uio);
struct arc_buf *dmu_xuio_arcbuf(struct xuio *uio, int i);
void dmu_xuio_clear(struct xuio *uio, int i);
+#endif /* HAVE_UIO_ZEROCOPY */
void xuio_stat_wbuf_copied(void);
void xuio_stat_wbuf_nocopy(void);
extern int zfs_prefetch_disable;
+extern int zfs_max_recordsize;
/*
* Asynchronously try to read in the data.
*/
-void dmu_prefetch(objset_t *os, uint64_t object, uint64_t offset,
- uint64_t len);
+void dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset,
+ uint64_t len, enum zio_priority pri);
typedef struct dmu_object_info {
/* All sizes are in bytes unless otherwise indicated. */
uint8_t doi_indirection; /* 2 = dnode->indirect->data */
uint8_t doi_checksum;
uint8_t doi_compress;
- uint8_t doi_pad[5];
+ uint8_t doi_nblkptr;
+ uint8_t doi_pad[4];
+ uint64_t doi_dnodesize;
uint64_t doi_physical_blocks_512; /* data + metadata, 512b blks */
uint64_t doi_max_offset;
uint64_t doi_fill_count; /* number of non-empty blocks */
} dmu_object_info_t;
-typedef void arc_byteswap_func_t(void *buf, size_t size);
+typedef void (*const arc_byteswap_func_t)(void *buf, size_t size);
typedef struct dmu_object_type_info {
dmu_object_byteswap_t ot_byteswap;
char *ot_name;
} dmu_object_type_info_t;
-typedef struct dmu_object_byteswap_info {
- arc_byteswap_func_t *ob_func;
+typedef const struct dmu_object_byteswap_info {
+ arc_byteswap_func_t ob_func;
char *ob_name;
} dmu_object_byteswap_info_t;
* If doi is NULL, just indicates whether the object exists.
*/
int dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi);
-void dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi);
+void __dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi);
+/* Like dmu_object_info, but faster if you have a held dnode in hand. */
+void dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi);
+/* Like dmu_object_info, but faster if you have a held dbuf in hand. */
void dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi);
+/*
+ * Like dmu_object_info_from_db, but faster still when you only care about
+ * the size. This is specifically optimized for zfs_getattr().
+ */
void dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize,
u_longlong_t *nblk512);
+void dmu_object_dnsize_from_db(dmu_buf_t *db, int *dnsize);
+
typedef struct dmu_objset_stats {
uint64_t dds_num_clones; /* number of clones of this */
uint64_t dds_creation_txg;
dmu_objset_type_t dds_type;
uint8_t dds_is_snapshot;
uint8_t dds_inconsistent;
- char dds_origin[MAXNAMELEN];
+ char dds_origin[ZFS_MAX_DATASET_NAME_LEN];
} dmu_objset_stats_t;
/*
/*
* Get the [cm]time for an objset's snapshot dir
*/
-timestruc_t dmu_objset_snap_cmtime(objset_t *os);
+inode_timespec_t dmu_objset_snap_cmtime(objset_t *os);
int dmu_objset_is_snapshot(objset_t *os);
extern void dmu_objset_name(objset_t *os, char *buf);
extern dmu_objset_type_t dmu_objset_type(objset_t *os);
extern uint64_t dmu_objset_id(objset_t *os);
-extern uint64_t dmu_objset_syncprop(objset_t *os);
-extern uint64_t dmu_objset_logbias(objset_t *os);
+extern uint64_t dmu_objset_dnodesize(objset_t *os);
+extern zfs_sync_type_t dmu_objset_syncprop(objset_t *os);
+extern zfs_logbias_op_t dmu_objset_logbias(objset_t *os);
extern int dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
uint64_t *id, uint64_t *offp, boolean_t *case_conflict);
-extern int dmu_snapshot_id(objset_t *os, const char *snapname, uint64_t *idp);
+extern int dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *val);
extern int dmu_snapshot_realname(objset_t *os, char *name, char *real,
int maxlen, boolean_t *conflict);
extern int dmu_dir_list_next(objset_t *os, int namelen, char *name,
void dmu_traverse_objset(objset_t *os, uint64_t txg_start,
dmu_traverse_cb_t cb, void *arg);
-int dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
- int outfd, struct vnode *vp, offset_t *off);
-int dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorign,
- uint64_t *sizep);
-
-typedef struct dmu_recv_cookie {
- /*
- * This structure is opaque!
- *
- * If logical and real are different, we are recving the stream
- * into the "real" temporary clone, and then switching it with
- * the "logical" target.
- */
- struct dsl_dataset *drc_logical_ds;
- struct dsl_dataset *drc_real_ds;
- struct drr_begin *drc_drrb;
- char *drc_tosnap;
- char *drc_top_ds;
- boolean_t drc_newfs;
- boolean_t drc_force;
- struct avl_tree *drc_guid_to_ds_map;
-} dmu_recv_cookie_t;
-
-int dmu_recv_begin(char *tofs, char *tosnap, char *topds, struct drr_begin *,
- boolean_t force, objset_t *origin, dmu_recv_cookie_t *);
-int dmu_recv_stream(dmu_recv_cookie_t *drc, struct vnode *vp, offset_t *voffp,
- int cleanup_fd, uint64_t *action_handlep);
-int dmu_recv_end(dmu_recv_cookie_t *drc);
-
-int dmu_diff(objset_t *tosnap, objset_t *fromsnap, struct vnode *vp,
- offset_t *off);
+int dmu_diff(const char *tosnap_name, const char *fromsnap_name,
+ struct vnode *vp, offset_t *offp);
/* CRC64 table */
#define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */
extern uint64_t zfs_crc64_table[256];
+extern int zfs_mdcomp_disable;
+
#ifdef __cplusplus
}
#endif
projects / mirror_zfs.git / blobdiff