/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011 Pawel Jakub Dawidek . * All rights reserved. */ #ifndef _SYS_FS_ZFS_VFSOPS_H #define _SYS_FS_ZFS_VFSOPS_H #if __FreeBSD_version >= 1300109 #define TEARDOWN_RMS #endif #if __FreeBSD_version >= 1300109 #define TEARDOWN_INACTIVE_RMS #endif #include #include #include #include #include #include #ifdef TEARDOWN_INACTIVE_RMS #include #endif #include #ifdef __cplusplus extern "C" { #endif #ifdef TEARDOWN_RMS typedef struct rmslock zfs_teardown_lock_t; #else #define zfs_teardown_lock_t rrmlock_t #endif #ifdef TEARDOWN_INACTIVE_RMS typedef struct rmslock zfs_teardown_inactive_lock_t; #else #define zfs_teardown_inactive_lock_t krwlock_t #endif typedef struct zfsvfs zfsvfs_t; struct znode; struct zfsvfs { vfs_t *z_vfs; /* generic fs struct */ zfsvfs_t *z_parent; /* parent fs */ objset_t *z_os; /* objset reference */ uint64_t z_flags; /* super_block flags */ uint64_t z_root; /* id of root znode */ uint64_t z_unlinkedobj; /* id of unlinked zapobj */ uint64_t z_max_blksz; /* maximum block size for files */ uint64_t z_fuid_obj; /* fuid table object number */ uint64_t z_fuid_size; /* fuid table size */ avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ krwlock_t z_fuid_lock; /* fuid lock */ boolean_t z_fuid_loaded; /* fuid tables are loaded */ boolean_t z_fuid_dirty; /* need to sync fuid table ? */ struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ zilog_t *z_log; /* intent log pointer */ uint_t z_acl_type; /* type of acl usable on this fs */ uint_t z_acl_mode; /* acl chmod/mode behavior */ uint_t z_acl_inherit; /* acl inheritance behavior */ zfs_case_t z_case; /* case-sense */ boolean_t z_utf8; /* utf8-only */ int z_norm; /* normalization flags */ boolean_t z_atime; /* enable atimes mount option */ boolean_t z_unmounted; /* unmounted */ zfs_teardown_lock_t z_teardown_lock; zfs_teardown_inactive_lock_t z_teardown_inactive_lock; list_t z_all_znodes; /* all vnodes in the fs */ uint64_t z_nr_znodes; /* number of znodes in the fs */ kmutex_t z_znodes_lock; /* lock for z_all_znodes */ struct zfsctl_root *z_ctldir; /* .zfs directory pointer */ boolean_t z_show_ctldir; /* expose .zfs in the root dir */ boolean_t z_issnap; /* true if this is a snapshot */ boolean_t z_vscan; /* virus scan on/off */ boolean_t z_use_fuids; /* version allows fuids */ boolean_t z_replay; /* set during ZIL replay */ boolean_t z_use_sa; /* version allow system attributes */ boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */ boolean_t z_use_namecache; /* make use of FreeBSD name cache */ uint8_t z_xattr; /* xattr type in use */ uint64_t z_version; /* ZPL version */ uint64_t z_shares_dir; /* hidden shares dir */ dataset_kstats_t z_kstat; /* fs kstats */ kmutex_t z_lock; uint64_t z_userquota_obj; uint64_t z_groupquota_obj; uint64_t z_userobjquota_obj; uint64_t z_groupobjquota_obj; uint64_t z_projectquota_obj; uint64_t z_projectobjquota_obj; uint64_t z_replay_eof; /* New end of file - replay only */ sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ #define ZFS_OBJ_MTX_SZ 64 kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ struct task z_unlinked_drain_task; }; #ifdef TEARDOWN_RMS #define ZFS_TEARDOWN_INIT(zfsvfs) \ rms_init(&(zfsvfs)->z_teardown_lock, "zfs teardown") #define ZFS_TEARDOWN_DESTROY(zfsvfs) \ rms_destroy(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \ rms_try_rlock(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \ rms_rlock(&(zfsvfs)->z_teardown_lock); #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \ rms_runlock(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \ rms_wlock(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \ rms_wunlock(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \ rms_unlock(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \ rms_rowned(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \ rms_wowned(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_HELD(zfsvfs) \ rms_owned_any(&(zfsvfs)->z_teardown_lock) #else #define ZFS_TEARDOWN_INIT(zfsvfs) \ rrm_init(&(zfsvfs)->z_teardown_lock, B_FALSE) #define ZFS_TEARDOWN_DESTROY(zfsvfs) \ rrm_destroy(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \ rw_tryenter(&(zfsvfs)->z_teardown_lock, RW_READER) #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \ rrm_enter_read(&(zfsvfs)->z_teardown_lock, tag); #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \ rrm_exit(&(zfsvfs)->z_teardown_lock, tag) #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \ rrm_enter(&(zfsvfs)->z_teardown_lock, RW_WRITER, tag) #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \ rrm_exit(&(zfsvfs)->z_teardown_lock, tag) #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \ rrm_exit(&(zfsvfs)->z_teardown_lock, tag) #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \ RRM_READ_HELD(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \ RRM_WRITE_HELD(&(zfsvfs)->z_teardown_lock) #define ZFS_TEARDOWN_HELD(zfsvfs) \ RRM_LOCK_HELD(&(zfsvfs)->z_teardown_lock) #endif #ifdef TEARDOWN_INACTIVE_RMS #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \ rms_init(&(zfsvfs)->z_teardown_inactive_lock, "zfs teardown inactive") #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \ rms_destroy(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \ rms_try_rlock(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \ rms_rlock(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \ rms_runlock(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \ rms_wlock(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \ rms_wunlock(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \ rms_wowned(&(zfsvfs)->z_teardown_inactive_lock) #else #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \ rw_init(&(zfsvfs)->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL) #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \ rw_destroy(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \ rw_tryenter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER) #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \ rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER) #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \ rw_exit(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \ rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_WRITER) #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \ rw_exit(&(zfsvfs)->z_teardown_inactive_lock) #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \ RW_WRITE_HELD(&(zfsvfs)->z_teardown_inactive_lock) #endif #define ZSB_XATTR 0x0001 /* Enable user xattrs */ /* * Normal filesystems (those not under .zfs/snapshot) have a total * file ID size limited to 12 bytes (including the length field) due to * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical * reasons, this same limit is being imposed by the Solaris NFSv3 implementation * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It * is not possible to expand beyond 12 bytes without abandoning support * of NFSv2. * * For normal filesystems, we partition up the available space as follows: * 2 bytes fid length (required) * 6 bytes object number (48 bits) * 4 bytes generation number (32 bits) * * We reserve only 48 bits for the object number, as this is the limit * currently defined and imposed by the DMU. */ typedef struct zfid_short { uint16_t zf_len; uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ } zfid_short_t; /* * Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes * (including the length field). This makes files under .zfs/snapshot * accessible by NFSv3 and NFSv4, but not NFSv2. * * For files under .zfs/snapshot, we partition up the available space * as follows: * 2 bytes fid length (required) * 6 bytes object number (48 bits) * 4 bytes generation number (32 bits) * 6 bytes objset id (48 bits) * 4 bytes[**] currently just zero (32 bits) * * We reserve only 48 bits for the object number and objset id, as these are * the limits currently defined and imposed by the DMU. * * [*] 20 bytes on FreeBSD to fit into the size of struct fid. * [**] 2 bytes on FreeBSD for the above reason. */ typedef struct zfid_long { zfid_short_t z_fid; uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */ } zfid_long_t; #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) extern uint_t zfs_fsyncer_key; extern int zfs_super_owner; extern void zfs_init(void); extern void zfs_fini(void); extern int zfs_suspend_fs(zfsvfs_t *zfsvfs); extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); extern int zfs_end_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers); extern int zfsvfs_create(const char *name, boolean_t readonly, zfsvfs_t **zfvp); extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os); extern void zfsvfs_free(zfsvfs_t *zfsvfs); extern int zfs_check_global_label(const char *dsname, const char *hexsl); extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs); extern int zfs_get_temporary_prop(struct dsl_dataset *ds, zfs_prop_t zfs_prop, uint64_t *val, char *setpoint); extern int zfs_busy(void); #ifdef __cplusplus } #endif #endif /* _SYS_FS_ZFS_VFSOPS_H */