diff options
Diffstat (limited to 'usr/src/lib/smbclnt/libfknsmb/common/sys/vfs.h')
| -rw-r--r-- | usr/src/lib/smbclnt/libfknsmb/common/sys/vfs.h | 622 |
1 files changed, 622 insertions, 0 deletions
diff --git a/usr/src/lib/smbclnt/libfknsmb/common/sys/vfs.h b/usr/src/lib/smbclnt/libfknsmb/common/sys/vfs.h new file mode 100644 index 0000000000..9906f94a12 --- /dev/null +++ b/usr/src/lib/smbclnt/libfknsmb/common/sys/vfs.h @@ -0,0 +1,622 @@ +/* + * 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) 1988, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright 2016 Toomas Soome <tsoome@me.com> + * Copyright (c) 2016, 2017 by Delphix. All rights reserved. + * Copyright 2017 Nexenta Systems, Inc. + */ + +/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ +/* All Rights Reserved */ + +/* + * Portions of this source code were derived from Berkeley 4.3 BSD + * under license from the Regents of the University of California. + */ + +#ifndef _SYS_VFS_H +#define _SYS_VFS_H + +#include <sys/zone.h> +#include <sys/types.h> +#include <sys/t_lock.h> +#include <sys/cred.h> +#include <sys/vnode.h> +#include <sys/statvfs.h> +#include <sys/refstr.h> +#include <sys/avl.h> +#include <sys/time.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Data associated with mounted file systems. + */ + +/* + * Operations vector. This is used internal to the kernel; file systems + * supply their list of operations via vfs_setfsops(). + */ + +typedef struct vfsops vfsops_t; + +/* + * File system identifier. Should be unique (at least per machine). + */ +typedef struct { + int val[2]; /* file system id type */ +} fsid_t; + +/* + * File identifier. Should be unique per filesystem on a single + * machine. This is typically called by a stateless file server + * in order to generate "file handles". + * + * Many underlying file systems cast a struct fid into other + * file system dependent structures which may require 4 byte alignment. + * Because a fid starts with a short it may not be 4 byte aligned, the + * fid_pad will force the alignment. + */ +#define MAXFIDSZ 64 +#define OLD_MAXFIDSZ 16 + +typedef struct fid { + union { + long fid_pad; + struct { + ushort_t len; /* length of data in bytes */ + char data[MAXFIDSZ]; /* data (variable len) */ + } _fid; + } un; +} fid_t; + +#ifdef _SYSCALL32 +/* + * Solaris 64 - use old-style cache format with 32-bit aligned fid for on-disk + * struct compatibility. + */ +typedef struct fid32 { + union { + int32_t fid_pad; + struct { + uint16_t len; /* length of data in bytes */ + char data[MAXFIDSZ]; /* data (variable len) */ + } _fid; + } un; +} fid32_t; +#else /* not _SYSCALL32 */ +#define fid32 fid +typedef fid_t fid32_t; +#endif /* _SYSCALL32 */ + +#define fid_len un._fid.len +#define fid_data un._fid.data + +/* + * Structure defining a mount option for a filesystem. + * option names are found in mntent.h + */ +typedef struct mntopt { + char *mo_name; /* option name */ + char **mo_cancel; /* list of options cancelled by this one */ + char *mo_arg; /* argument string for this option */ + int mo_flags; /* flags for this mount option */ + void *mo_data; /* filesystem specific data */ +} mntopt_t; + +/* + * Flags that apply to mount options + */ + +#define MO_SET 0x01 /* option is set */ +#define MO_NODISPLAY 0x02 /* option not listed in mnttab */ +#define MO_HASVALUE 0x04 /* option takes a value */ +#define MO_IGNORE 0x08 /* option ignored by parser */ +#define MO_DEFAULT MO_SET /* option is on by default */ +#define MO_TAG 0x10 /* flags a tag set by user program */ +#define MO_EMPTY 0x20 /* empty space in option table */ + +#define VFS_NOFORCEOPT 0x01 /* honor MO_IGNORE (don't set option) */ +#define VFS_DISPLAY 0x02 /* Turn off MO_NODISPLAY bit for opt */ +#define VFS_NODISPLAY 0x04 /* Turn on MO_NODISPLAY bit for opt */ +#define VFS_CREATEOPT 0x08 /* Create the opt if it's not there */ + +/* + * Structure holding mount option strings for the mounted file system. + */ +typedef struct mntopts { + uint_t mo_count; /* number of entries in table */ + mntopt_t *mo_list; /* list of mount options */ +} mntopts_t; + +/* + * The kstat structures associated with the vopstats are kept in an + * AVL tree. This is to avoid the case where a file system does not + * use a unique fsid_t for each vfs (e.g., namefs). In order to do + * this, we need a structure that the AVL tree can use that also + * references the kstat. + * Note that the vks_fsid is generated from the value reported by + * VFS_STATVFS(). + */ +typedef struct vskstat_anchor vsk_anchor_t; + +extern avl_tree_t vskstat_tree; +extern kmutex_t vskstat_tree_lock; + +#if defined(_KERNEL) || defined(_FAKE_KERNEL) +/* + * Structure per mounted file system. Each mounted file system has + * an array of operations and an instance record. + * + * The file systems are kept on a doubly linked circular list headed by + * "rootvfs". + * File system implementations should not access this list; + * it's intended for use only in the kernel's vfs layer. + * + * Each zone also has its own list of mounts, containing filesystems mounted + * somewhere within the filesystem tree rooted at the zone's rootpath. The + * list is doubly linked to match the global list. + * + * mnttab locking: the in-kernel mnttab uses the vfs_mntpt, vfs_resource and + * vfs_mntopts fields in the vfs_t. mntpt and resource are refstr_ts that + * are set at mount time and can only be modified during a remount. + * It is safe to read these fields if you can prevent a remount on the vfs, + * or through the convenience funcs vfs_getmntpoint() and vfs_getresource(). + * The mntopts field may only be accessed through the provided convenience + * functions, as it is protected by the vfs list lock. Modifying a mount + * option requires grabbing the vfs list write lock, which can be a very + * high latency lock. + */ +struct zone; /* from zone.h */ +struct fem_head; /* from fem.h */ + +typedef struct vfs { + struct vfs *vfs_next; /* next VFS in VFS list */ + struct vfs *vfs_prev; /* prev VFS in VFS list */ + +/* vfs_op should not be used directly. Accessor functions are provided */ + vfsops_t *vfs_op; /* operations on VFS */ + + struct vnode *vfs_vnodecovered; /* vnode mounted on */ + uint_t vfs_flag; /* flags */ + uint_t vfs_bsize; /* native block size */ + int vfs_fstype; /* file system type index */ + fsid_t vfs_fsid; /* file system id */ + void *vfs_data; /* private data */ + dev_t vfs_dev; /* device of mounted VFS */ + ulong_t vfs_bcount; /* I/O count (accounting) */ + struct vfs *vfs_list; /* sync list pointer */ + struct vfs *vfs_hash; /* hash list pointer */ + ksema_t vfs_reflock; /* mount/unmount/sync lock */ + uint_t vfs_count; /* vfs reference count */ + mntopts_t vfs_mntopts; /* options mounted with */ + refstr_t *vfs_resource; /* mounted resource name */ + refstr_t *vfs_mntpt; /* mount point name */ + time_t vfs_mtime; /* time we were mounted */ + struct vfs_impl *vfs_implp; /* impl specific data */ + /* + * Zones support. Note that the zone that "owns" the mount isn't + * necessarily the same as the zone in which the zone is visible. + * That is, vfs_zone and (vfs_zone_next|vfs_zone_prev) may refer to + * different zones. + */ + struct zone *vfs_zone; /* zone that owns the mount */ + struct vfs *vfs_zone_next; /* next VFS visible in zone */ + struct vfs *vfs_zone_prev; /* prev VFS visible in zone */ + + struct fem_head *vfs_femhead; /* fs monitoring */ + uint32_t vfs_lofi_id; /* ID if lofi mount */ +} vfs_t; + +#define vfs_featureset vfs_implp->vi_featureset +#define vfs_vskap vfs_implp->vi_vskap +#define vfs_fstypevsp vfs_implp->vi_fstypevsp +#define vfs_vopstats vfs_implp->vi_vopstats +#define vfs_hrctime vfs_implp->vi_hrctime + +#else // defined(_KERNEL) || defined(_FAKE_KERNEL) + +typedef struct vfs vfs_t; + +#endif // defined(_KERNEL) || defined(_FAKE_KERNEL) + +/* + * VFS flags. + */ +#define VFS_RDONLY 0x01 /* read-only vfs */ +#define VFS_NOMNTTAB 0x02 /* vfs not seen in mnttab */ +#define VFS_NOSETUID 0x08 /* setuid disallowed */ +#define VFS_REMOUNT 0x10 /* modify mount options only */ +#define VFS_NOTRUNC 0x20 /* does not truncate long file names */ +#define VFS_UNLINKABLE 0x40 /* unlink(2) can be applied to root */ +#define VFS_PXFS 0x80 /* clustering: global fs proxy vfs */ +#define VFS_UNMOUNTED 0x100 /* file system has been unmounted */ +#define VFS_NBMAND 0x200 /* allow non-blocking mandatory locks */ +#define VFS_XATTR 0x400 /* fs supports extended attributes */ +#define VFS_NODEVICES 0x800 /* device-special files disallowed */ +#define VFS_NOEXEC 0x1000 /* executables disallowed */ +#define VFS_STATS 0x2000 /* file system can collect stats */ +#define VFS_XID 0x4000 /* file system supports extended ids */ + +#define VFS_NORESOURCE "unspecified_resource" +#define VFS_NOMNTPT "unspecified_mountpoint" + +/* + * VFS features are implemented as bits set in the vfs_t. + * The vfs_feature_t typedef is a 64-bit number that will translate + * into an element in an array of bitmaps and a bit in that element. + * Developers must not depend on the implementation of this and + * need to use vfs_has_feature()/vfs_set_feature() routines. + */ +typedef uint64_t vfs_feature_t; + +#define VFSFT_XVATTR 0x100000001 /* Supports xvattr for attrs */ +#define VFSFT_CASEINSENSITIVE 0x100000002 /* Supports case-insensitive */ +#define VFSFT_NOCASESENSITIVE 0x100000004 /* NOT case-sensitive */ +#define VFSFT_DIRENTFLAGS 0x100000008 /* Supports dirent flags */ +#define VFSFT_ACLONCREATE 0x100000010 /* Supports ACL on create */ +#define VFSFT_ACEMASKONACCESS 0x100000020 /* Can use ACEMASK for access */ +#define VFSFT_SYSATTR_VIEWS 0x100000040 /* Supports sysattr view i/f */ +#define VFSFT_ACCESS_FILTER 0x100000080 /* dirents filtered by access */ +#define VFSFT_REPARSE 0x100000100 /* Supports reparse point */ +#define VFSFT_ZEROCOPY_SUPPORTED 0x100000200 + /* Support loaning /returning cache buffer */ +/* + * Argument structure for mount(2). + * + * Flags are defined in <sys/mount.h>. + * + * Note that if the MS_SYSSPACE bit is set in flags, the pointer fields in + * this structure are to be interpreted as kernel addresses. File systems + * should be prepared for this possibility. + */ +struct mounta { + char *spec; + char *dir; + int flags; + char *fstype; + char *dataptr; + int datalen; + char *optptr; + int optlen; +}; + +/* + * Reasons for calling the vfs_mountroot() operation. + */ +enum whymountroot { ROOT_INIT, ROOT_REMOUNT, ROOT_UNMOUNT}; +typedef enum whymountroot whymountroot_t; + +/* + * Reasons for calling the VFS_VNSTATE(): + */ +enum vntrans { + VNTRANS_EXISTS, + VNTRANS_IDLED, + VNTRANS_RECLAIMED, + VNTRANS_DESTROYED +}; +typedef enum vntrans vntrans_t; + +/* + * VFS_OPS defines all the vfs operations. It is used to define + * the vfsops structure (below) and the fs_func_p union (vfs_opreg.h). + */ +#define VFS_OPS \ + int (*vfs_mount)(vfs_t *, vnode_t *, struct mounta *, cred_t *); \ + int (*vfs_unmount)(vfs_t *, int, cred_t *); \ + int (*vfs_root)(vfs_t *, vnode_t **); \ + int (*vfs_statvfs)(vfs_t *, statvfs64_t *); \ + int (*vfs_sync)(vfs_t *, short, cred_t *); \ + int (*vfs_vget)(vfs_t *, vnode_t **, fid_t *); \ + int (*vfs_mountroot)(vfs_t *, enum whymountroot); \ + void (*vfs_freevfs)(vfs_t *); \ + int (*vfs_vnstate)(vfs_t *, vnode_t *, vntrans_t) /* NB: No ";" */ + +/* + * Operations supported on virtual file system. + */ +struct vfsops { + VFS_OPS; /* Signature of all vfs operations (vfsops) */ +}; + +extern int fsop_mount(vfs_t *, vnode_t *, struct mounta *, cred_t *); +extern int fsop_unmount(vfs_t *, int, cred_t *); +extern int fsop_root(vfs_t *, vnode_t **); +extern int fsop_statfs(vfs_t *, statvfs64_t *); +extern int fsop_sync(vfs_t *, short, cred_t *); +extern int fsop_vget(vfs_t *, vnode_t **, fid_t *); +extern int fsop_mountroot(vfs_t *, enum whymountroot); +extern void fsop_freefs(vfs_t *); +extern int fsop_sync_by_kind(int, short, cred_t *); +extern int fsop_vnstate(vfs_t *, vnode_t *, vntrans_t); + +#define VFS_MOUNT(vfsp, mvp, uap, cr) fsop_mount(vfsp, mvp, uap, cr) +#define VFS_UNMOUNT(vfsp, flag, cr) fsop_unmount(vfsp, flag, cr) +#define VFS_ROOT(vfsp, vpp) fsop_root(vfsp, vpp) +#define VFS_STATVFS(vfsp, sp) fsop_statfs(vfsp, sp) +#define VFS_SYNC(vfsp, flag, cr) fsop_sync(vfsp, flag, cr) +#define VFS_VGET(vfsp, vpp, fidp) fsop_vget(vfsp, vpp, fidp) +#define VFS_MOUNTROOT(vfsp, init) fsop_mountroot(vfsp, init) +#define VFS_FREEVFS(vfsp) fsop_freefs(vfsp) +#define VFS_VNSTATE(vfsp, vn, ns) fsop_vnstate(vfsp, vn, ns) + +#define VFSNAME_MOUNT "mount" +#define VFSNAME_UNMOUNT "unmount" +#define VFSNAME_ROOT "root" +#define VFSNAME_STATVFS "statvfs" +#define VFSNAME_SYNC "sync" +#define VFSNAME_VGET "vget" +#define VFSNAME_MOUNTROOT "mountroot" +#define VFSNAME_FREEVFS "freevfs" +#define VFSNAME_VNSTATE "vnstate" +/* + * Filesystem type switch table. + */ + +typedef struct vfssw { + char *vsw_name; /* type name -- max len _ST_FSTYPSZ */ + int (*vsw_init) (int, char *); + /* init routine (for non-loadable fs only) */ + int vsw_flag; /* flags */ + mntopts_t vsw_optproto; /* mount options table prototype */ + uint_t vsw_count; /* count of references */ + kmutex_t vsw_lock; /* lock to protect vsw_count */ + vfsops_t vsw_vfsops; /* filesystem operations vector */ +} vfssw_t; + +/* + * Filesystem type definition record. All file systems must export a record + * of this type through their modlfs structure. N.B., changing the version + * number requires a change in sys/modctl.h. + */ + +typedef struct vfsdef_v5 { + int def_version; /* structure version, must be first */ + char *name; /* filesystem type name */ + int (*init) (int, char *); /* init routine */ + int flags; /* filesystem flags */ + mntopts_t *optproto; /* mount options table prototype */ +} vfsdef_v5; + +typedef struct vfsdef_v5 vfsdef_t; + +enum { + VFSDEF_VERSION = 5 +}; + +/* Specific to libfksmbfs */ +int fake_installfs(vfsdef_t *); +int fake_removefs(vfsdef_t *); + +/* + * flags for vfssw and vfsdef + */ +#define VSW_HASPROTO 0x01 /* struct has a mount options prototype */ +#define VSW_CANRWRO 0x02 /* file system can transition from rw to ro */ +#define VSW_CANREMOUNT 0x04 /* file system supports remounts */ +#define VSW_NOTZONESAFE 0x08 /* zone_enter(2) should fail for these files */ +#define VSW_VOLATILEDEV 0x10 /* vfs_dev can change each time fs is mounted */ +#define VSW_STATS 0x20 /* file system can collect stats */ +#define VSW_XID 0x40 /* file system supports extended ids */ +#define VSW_CANLOFI 0x80 /* file system supports lofi mounts */ +#define VSW_ZMOUNT 0x100 /* file system always allowed in a zone */ +#define VSW_MOUNTDEV 0x200 /* file system is mounted via device path */ + +#define VSW_INSTALLED 0x8000 /* this vsw is associated with a file system */ + +/* + * A flag for vfs_setpath(). + */ +#define VFSSP_VERBATIM 0x1 /* do not prefix the supplied path */ + +#if defined(_KERNEL) || defined(_FAKE_KERNEL) + +/* + * Private vfs data, NOT to be used by a file system implementation. + */ + +#define VFS_FEATURE_MAXSZ 4 + +typedef struct vfs_impl { + /* Counted array - Bitmap of vfs features */ + uint32_t vi_featureset[VFS_FEATURE_MAXSZ]; + /* + * Support for statistics on the vnode operations + */ + vsk_anchor_t *vi_vskap; /* anchor for vopstats' kstat */ + vopstats_t *vi_fstypevsp; /* ptr to per-fstype vopstats */ + vopstats_t vi_vopstats; /* per-mount vnode op stats */ + + timespec_t vi_hrctime; /* High-res creation time */ + + zone_ref_t vi_zone_ref; /* reference to zone */ +} vfs_impl_t; + +/* + * Public operations. + */ +struct umounta; +struct statvfsa; +struct fstatvfsa; + +void vfs_freevfsops(vfsops_t *); +int vfs_freevfsops_by_type(int); +void vfs_setops(vfs_t *, vfsops_t *); +vfsops_t *vfs_getops(vfs_t *vfsp); +int vfs_matchops(vfs_t *, vfsops_t *); +int vfs_can_sync(vfs_t *vfsp); +vfs_t *vfs_alloc(int); +void vfs_free(vfs_t *); +void vfs_init(vfs_t *vfsp, vfsops_t *, void *); +void vfsimpl_setup(vfs_t *vfsp); +void vfsimpl_teardown(vfs_t *vfsp); +void vn_exists(vnode_t *); +void vn_idle(vnode_t *); +void vn_reclaim(vnode_t *); +void vn_invalid(vnode_t *); + +int rootconf(void); +int domount(char *, struct mounta *, vnode_t *, struct cred *, + struct vfs **); +int dounmount(struct vfs *, int, cred_t *); +int vfs_lock(struct vfs *); +int vfs_rlock(struct vfs *); +void vfs_lock_wait(struct vfs *); +void vfs_rlock_wait(struct vfs *); +void vfs_unlock(struct vfs *); +int vfs_lock_held(struct vfs *); +struct _kthread *vfs_lock_owner(struct vfs *); +void sync(void); +void vfs_sync(int); +void vfs_mountroot(void); +void vfs_add(vnode_t *, struct vfs *, int); +void vfs_remove(struct vfs *); + +/* VFS feature routines */ +void vfs_set_feature(vfs_t *, vfs_feature_t); +void vfs_clear_feature(vfs_t *, vfs_feature_t); +int vfs_has_feature(vfs_t *, vfs_feature_t); +void vfs_propagate_features(vfs_t *, vfs_t *); + +/* The following functions are not for general use by filesystems */ + +void vfs_createopttbl(mntopts_t *, const char *); +void vfs_copyopttbl(const mntopts_t *, mntopts_t *); +void vfs_mergeopttbl(const mntopts_t *, const mntopts_t *, mntopts_t *); +void vfs_freeopttbl(mntopts_t *); +void vfs_parsemntopts(mntopts_t *, char *, int); +int vfs_buildoptionstr(const mntopts_t *, char *, int); +struct mntopt *vfs_hasopt(const mntopts_t *, const char *); +void vfs_mnttab_modtimeupd(void); + +void vfs_clearmntopt(struct vfs *, const char *); +void vfs_setmntopt(struct vfs *, const char *, const char *, int); +void vfs_setresource(struct vfs *, const char *, uint32_t); +void vfs_setmntpoint(struct vfs *, const char *, uint32_t); +refstr_t *vfs_getresource(const struct vfs *); +refstr_t *vfs_getmntpoint(const struct vfs *); +int vfs_optionisset(const struct vfs *, const char *, char **); +int vfs_settag(uint_t, uint_t, const char *, const char *, cred_t *); +int vfs_clrtag(uint_t, uint_t, const char *, const char *, cred_t *); +void vfs_syncall(void); +void vfsinit(void); +void vfs_unmountall(void); +void vfs_make_fsid(fsid_t *, dev_t, int); +void vfs_addmip(dev_t, struct vfs *); +void vfs_delmip(struct vfs *); +int vfs_devismounted(dev_t); +int vfs_devmounting(dev_t, struct vfs *); +int vfs_opsinuse(vfsops_t *); +struct vfs *getvfs(fsid_t *); +struct vfs *vfs_dev2vfsp(dev_t); +struct vfs *vfs_mntpoint2vfsp(const char *); +struct vfssw *allocate_vfssw(const char *); +struct vfssw *vfs_getvfssw(const char *); +struct vfssw *vfs_getvfsswbyname(const char *); +struct vfssw *vfs_getvfsswbyvfsops(vfsops_t *); +void vfs_refvfssw(struct vfssw *); +void vfs_unrefvfssw(struct vfssw *); +uint_t vf_to_stf(uint_t); +void vfs_mnttab_modtime(timespec_t *); +void vfs_mnttab_poll(timespec_t *, struct pollhead **); + +void vfs_list_lock(void); +void vfs_list_read_lock(void); +void vfs_list_unlock(void); +void vfs_list_add(struct vfs *); +void vfs_list_remove(struct vfs *); +void vfs_hold(vfs_t *vfsp); +void vfs_rele(vfs_t *vfsp); +void fs_freevfs(vfs_t *); +void vfs_root_redev(vfs_t *vfsp, dev_t ndev, int fstype); + +int vfs_zone_change_safe(vfs_t *); + +int vfs_get_lofi(vfs_t *, vnode_t **); + +#define VFSHASH(maj, min) (((int)((maj)+(min))) & (vfshsz - 1)) +#define VFS_ON_LIST(vfsp) \ + ((vfsp)->vfs_next != (vfsp) && (vfsp)->vfs_next != NULL) + +/* + * Globals. + */ + +extern struct vfssw vfssw[]; /* table of filesystem types */ +extern krwlock_t vfssw_lock; +extern char rootfstype[]; /* name of root fstype */ +extern const int nfstype; /* # of elements in vfssw array */ +extern vfsops_t *EIO_vfsops; /* operations for vfs being torn-down */ + +/* + * The following variables are private to the the kernel's vfs layer. File + * system implementations should not access them. + */ +extern struct vfs *rootvfs; /* ptr to root vfs structure */ +typedef struct { + struct vfs *rvfs_head; /* head vfs in chain */ + kmutex_t rvfs_lock; /* mutex protecting this chain */ + uint32_t rvfs_len; /* length of this chain */ +} rvfs_t; +extern rvfs_t *rvfs_list; +extern int vfshsz; /* # of elements in rvfs_head array */ +extern const mntopts_t vfs_mntopts; /* globally recognized options */ + +#endif /* defined(_KERNEL) */ + +#define VFS_HOLD(vfsp) { \ + vfs_hold(vfsp); \ +} + +#define VFS_RELE(vfsp) { \ + vfs_rele(vfsp); \ +} + +#define VFS_INIT(vfsp, op, data) { \ + vfs_init((vfsp), (op), (data)); \ +} + + +#define VFS_INSTALLED(vfsswp) (((vfsswp)->vsw_flag & VSW_INSTALLED) != 0) +#define ALLOCATED_VFSSW(vswp) ((vswp)->vsw_name[0] != '\0') +#define RLOCK_VFSSW() (rw_enter(&vfssw_lock, RW_READER)) +#define RUNLOCK_VFSSW() (rw_exit(&vfssw_lock)) +#define WLOCK_VFSSW() (rw_enter(&vfssw_lock, RW_WRITER)) +#define WUNLOCK_VFSSW() (rw_exit(&vfssw_lock)) +#define VFSSW_LOCKED() (RW_LOCK_HELD(&vfssw_lock)) +#define VFSSW_WRITE_LOCKED() (RW_WRITE_HELD(&vfssw_lock)) +/* + * VFS_SYNC flags. + */ +#define SYNC_ATTR 0x01 /* sync attributes only */ +#define SYNC_CLOSE 0x02 /* close open file */ +#define SYNC_ALL 0x04 /* force to sync all fs */ + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_VFS_H */ |