diff options
author | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-07 09:52:04 -0600 |
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committer | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-07 09:52:04 -0600 |
commit | a9153ec3040f54fa52b68e14dafed2aba7b780ae (patch) | |
tree | fda80e3380dfebf7d97868507aa185757852e882 /rtems/freebsd/sys/mount.h | |
download | rtems-libbsd-a9153ec3040f54fa52b68e14dafed2aba7b780ae.tar.bz2 |
Initial import
Code is based on FreeBSD 8.2 with USB support from Sebastian Huber
and Thomas Doerfler. Initial TCP/IP stack work is from Kevel Kirspel.
Diffstat (limited to 'rtems/freebsd/sys/mount.h')
-rw-r--r-- | rtems/freebsd/sys/mount.h | 798 |
1 files changed, 798 insertions, 0 deletions
diff --git a/rtems/freebsd/sys/mount.h b/rtems/freebsd/sys/mount.h new file mode 100644 index 00000000..a3fc6717 --- /dev/null +++ b/rtems/freebsd/sys/mount.h @@ -0,0 +1,798 @@ +/*- + * Copyright (c) 1989, 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)mount.h 8.21 (Berkeley) 5/20/95 + * $FreeBSD$ + */ + +#ifndef _SYS_MOUNT_HH_ +#define _SYS_MOUNT_HH_ + +#include <rtems/freebsd/sys/ucred.h> +#include <rtems/freebsd/sys/queue.h> +#ifdef _KERNEL +#include <rtems/freebsd/sys/lock.h> +#include <rtems/freebsd/sys/lockmgr.h> +#include <rtems/freebsd/sys/_mutex.h> +#endif + +/* + * NOTE: When changing statfs structure, mount structure, MNT_* flags or + * MNTK_* flags also update DDB show mount command in vfs_subr.c. + */ + +typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */ + +/* + * File identifier. + * These are unique per filesystem on a single machine. + */ +#define MAXFIDSZ 16 + +struct fid { + u_short fid_len; /* length of data in bytes */ + u_short fid_data0; /* force longword alignment */ + char fid_data[MAXFIDSZ]; /* data (variable length) */ +}; + +/* + * filesystem statistics + */ +#define MFSNAMELEN 16 /* length of type name including null */ +#define MNAMELEN 88 /* size of on/from name bufs */ +#define STATFS_VERSION 0x20030518 /* current version number */ +struct statfs { + uint32_t f_version; /* structure version number */ + uint32_t f_type; /* type of filesystem */ + uint64_t f_flags; /* copy of mount exported flags */ + uint64_t f_bsize; /* filesystem fragment size */ + uint64_t f_iosize; /* optimal transfer block size */ + uint64_t f_blocks; /* total data blocks in filesystem */ + uint64_t f_bfree; /* free blocks in filesystem */ + int64_t f_bavail; /* free blocks avail to non-superuser */ + uint64_t f_files; /* total file nodes in filesystem */ + int64_t f_ffree; /* free nodes avail to non-superuser */ + uint64_t f_syncwrites; /* count of sync writes since mount */ + uint64_t f_asyncwrites; /* count of async writes since mount */ + uint64_t f_syncreads; /* count of sync reads since mount */ + uint64_t f_asyncreads; /* count of async reads since mount */ + uint64_t f_spare[10]; /* unused spare */ + uint32_t f_namemax; /* maximum filename length */ + uid_t f_owner; /* user that mounted the filesystem */ + fsid_t f_fsid; /* filesystem id */ + char f_charspare[80]; /* spare string space */ + char f_fstypename[MFSNAMELEN]; /* filesystem type name */ + char f_mntfromname[MNAMELEN]; /* mounted filesystem */ + char f_mntonname[MNAMELEN]; /* directory on which mounted */ +}; + +#ifdef _KERNEL +#define OMFSNAMELEN 16 /* length of fs type name, including null */ +#define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */ + +/* XXX getfsstat.2 is out of date with write and read counter changes here. */ +/* XXX statfs.2 is out of date with read counter changes here. */ +struct ostatfs { + long f_spare2; /* placeholder */ + long f_bsize; /* fundamental filesystem block size */ + long f_iosize; /* optimal transfer block size */ + long f_blocks; /* total data blocks in filesystem */ + long f_bfree; /* free blocks in fs */ + long f_bavail; /* free blocks avail to non-superuser */ + long f_files; /* total file nodes in filesystem */ + long f_ffree; /* free file nodes in fs */ + fsid_t f_fsid; /* filesystem id */ + uid_t f_owner; /* user that mounted the filesystem */ + int f_type; /* type of filesystem */ + int f_flags; /* copy of mount exported flags */ + long f_syncwrites; /* count of sync writes since mount */ + long f_asyncwrites; /* count of async writes since mount */ + char f_fstypename[OMFSNAMELEN]; /* fs type name */ + char f_mntonname[OMNAMELEN]; /* directory on which mounted */ + long f_syncreads; /* count of sync reads since mount */ + long f_asyncreads; /* count of async reads since mount */ + short f_spares1; /* unused spare */ + char f_mntfromname[OMNAMELEN];/* mounted filesystem */ + short f_spares2; /* unused spare */ + /* + * XXX on machines where longs are aligned to 8-byte boundaries, there + * is an unnamed int32_t here. This spare was after the apparent end + * of the struct until we bit off the read counters from f_mntonname. + */ + long f_spare[2]; /* unused spare */ +}; + +TAILQ_HEAD(vnodelst, vnode); + +/* Mount options list */ +TAILQ_HEAD(vfsoptlist, vfsopt); +struct vfsopt { + TAILQ_ENTRY(vfsopt) link; + char *name; + void *value; + int len; + int pos; + int seen; +}; + +/* + * Structure per mounted filesystem. Each mounted filesystem has an + * array of operations and an instance record. The filesystems are + * put on a doubly linked list. + * + * Lock reference: + * m - mountlist_mtx + * i - interlock + * + * Unmarked fields are considered stable as long as a ref is held. + * + */ +struct mount { + struct mtx mnt_mtx; /* mount structure interlock */ + int mnt_gen; /* struct mount generation */ +#define mnt_startzero mnt_list + TAILQ_ENTRY(mount) mnt_list; /* (m) mount list */ + struct vfsops *mnt_op; /* operations on fs */ + struct vfsconf *mnt_vfc; /* configuration info */ + struct vnode *mnt_vnodecovered; /* vnode we mounted on */ + struct vnode *mnt_syncer; /* syncer vnode */ + int mnt_ref; /* (i) Reference count */ + struct vnodelst mnt_nvnodelist; /* (i) list of vnodes */ + int mnt_nvnodelistsize; /* (i) # of vnodes */ + int mnt_writeopcount; /* (i) write syscalls pending */ + int mnt_kern_flag; /* (i) kernel only flags */ + u_int mnt_flag; /* (i) flags shared with user */ + u_int mnt_xflag; /* (i) more flags shared with user */ + u_int mnt_noasync; /* (i) # noasync overrides */ + struct vfsoptlist *mnt_opt; /* current mount options */ + struct vfsoptlist *mnt_optnew; /* new options passed to fs */ + int mnt_maxsymlinklen; /* max size of short symlink */ + struct statfs mnt_stat; /* cache of filesystem stats */ + struct ucred *mnt_cred; /* credentials of mounter */ + void * mnt_data; /* private data */ + time_t mnt_time; /* last time written*/ + int mnt_iosize_max; /* max size for clusters, etc */ + struct netexport *mnt_export; /* export list */ + struct label *mnt_label; /* MAC label for the fs */ + u_int mnt_hashseed; /* Random seed for vfs_hash */ + int mnt_lockref; /* (i) Lock reference count */ + int mnt_secondary_writes; /* (i) # of secondary writes */ + int mnt_secondary_accwrites;/* (i) secondary wr. starts */ + struct thread *mnt_susp_owner; /* (i) thread owning suspension */ +#define mnt_endzero mnt_gjprovider + char *mnt_gjprovider; /* gjournal provider name */ + struct lock mnt_explock; /* vfs_export walkers lock */ +}; + +struct vnode *__mnt_vnode_next(struct vnode **mvp, struct mount *mp); +struct vnode *__mnt_vnode_first(struct vnode **mvp, struct mount *mp); +void __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp); + +#define MNT_VNODE_FOREACH(vp, mp, mvp) \ + for (vp = __mnt_vnode_first(&(mvp), (mp)); \ + (vp) != NULL; vp = __mnt_vnode_next(&(mvp), (mp))) + +#define MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp) \ + __mnt_vnode_markerfree(&(mvp), (mp)) + +#define MNT_VNODE_FOREACH_ABORT(mp, mvp) \ + do { \ + MNT_ILOCK(mp); \ + MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp); \ + MNT_IUNLOCK(mp); \ + } while (0) + +#define MNT_ILOCK(mp) mtx_lock(&(mp)->mnt_mtx) +#define MNT_ITRYLOCK(mp) mtx_trylock(&(mp)->mnt_mtx) +#define MNT_IUNLOCK(mp) mtx_unlock(&(mp)->mnt_mtx) +#define MNT_MTX(mp) (&(mp)->mnt_mtx) +#define MNT_REF(mp) (mp)->mnt_ref++ +#define MNT_REL(mp) do { \ + KASSERT((mp)->mnt_ref > 0, ("negative mnt_ref")); \ + (mp)->mnt_ref--; \ + if ((mp)->mnt_ref == 0) \ + wakeup((mp)); \ +} while (0) + +#endif /* _KERNEL */ + +/* + * User specifiable flags, stored in mnt_flag. + */ +#define MNT_RDONLY 0x00000001 /* read only filesystem */ +#define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */ +#define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ +#define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ +#define MNT_UNION 0x00000020 /* union with underlying filesystem */ +#define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */ +#define MNT_SUIDDIR 0x00100000 /* special handling of SUID on dirs */ +#define MNT_SOFTDEP 0x00200000 /* soft updates being done */ +#define MNT_NOSYMFOLLOW 0x00400000 /* do not follow symlinks */ +#define MNT_GJOURNAL 0x02000000 /* GEOM journal support enabled */ +#define MNT_MULTILABEL 0x04000000 /* MAC support for individual objects */ +#define MNT_ACLS 0x08000000 /* ACL support enabled */ +#define MNT_NOATIME 0x10000000 /* disable update of file access time */ +#define MNT_NOCLUSTERR 0x40000000 /* disable cluster read */ +#define MNT_NOCLUSTERW 0x80000000 /* disable cluster write */ +#define MNT_NFS4ACLS 0x00000010 + +/* + * NFS export related mount flags. + */ +#define MNT_EXRDONLY 0x00000080 /* exported read only */ +#define MNT_EXPORTED 0x00000100 /* filesystem is exported */ +#define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ +#define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ +#define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ +#define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ + +/* + * Flags set by internal operations, + * but visible to the user. + * XXX some of these are not quite right.. (I've never seen the root flag set) + */ +#define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ +#define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ +#define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ +#define MNT_USER 0x00008000 /* mounted by a user */ +#define MNT_IGNORE 0x00800000 /* do not show entry in df */ + +/* + * Mask of flags that are visible to statfs(). + * XXX I think that this could now become (~(MNT_CMDFLAGS)) + * but the 'mount' program may need changing to handle this. + */ +#define MNT_VISFLAGMASK (MNT_RDONLY | MNT_SYNCHRONOUS | MNT_NOEXEC | \ + MNT_NOSUID | MNT_UNION | \ + MNT_ASYNC | MNT_EXRDONLY | MNT_EXPORTED | \ + MNT_DEFEXPORTED | MNT_EXPORTANON| MNT_EXKERB | \ + MNT_LOCAL | MNT_USER | MNT_QUOTA | \ + MNT_ROOTFS | MNT_NOATIME | MNT_NOCLUSTERR| \ + MNT_NOCLUSTERW | MNT_SUIDDIR | MNT_SOFTDEP | \ + MNT_IGNORE | MNT_EXPUBLIC | MNT_NOSYMFOLLOW | \ + MNT_GJOURNAL | MNT_MULTILABEL | MNT_ACLS | MNT_NFS4ACLS) + +/* Mask of flags that can be updated. */ +#define MNT_UPDATEMASK (MNT_NOSUID | MNT_NOEXEC | \ + MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | \ + MNT_NOATIME | \ + MNT_NOSYMFOLLOW | MNT_IGNORE | \ + MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR | \ + MNT_ACLS | MNT_USER | MNT_NFS4ACLS) + +/* + * External filesystem command modifier flags. + * Unmount can use the MNT_FORCE flag. + * XXX: These are not STATES and really should be somewhere else. + * XXX: MNT_BYFSID collides with MNT_ACLS, but because MNT_ACLS is only used for + * mount(2) and MNT_BYFSID is only used for unmount(2) it's harmless. + */ +#define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ +#define MNT_DELEXPORT 0x00020000 /* delete export host lists */ +#define MNT_RELOAD 0x00040000 /* reload filesystem data */ +#define MNT_FORCE 0x00080000 /* force unmount or readonly change */ +#define MNT_SNAPSHOT 0x01000000 /* snapshot the filesystem */ +#define MNT_BYFSID 0x08000000 /* specify filesystem by ID. */ +#define MNT_CMDFLAGS (MNT_UPDATE | MNT_DELEXPORT | MNT_RELOAD | \ + MNT_FORCE | MNT_SNAPSHOT | MNT_BYFSID) +/* + * Internal filesystem control flags stored in mnt_kern_flag. + * + * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed + * past the mount point. This keeps the subtree stable during mounts + * and unmounts. + * + * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while + * dounmount() is still waiting to lock the mountpoint. This allows + * the filesystem to cancel operations that might otherwise deadlock + * with the unmount attempt (used by NFS). + * + * MNTK_NOINSMNTQ is strict subset of MNTK_UNMOUNT. They are separated + * to allow for failed unmount attempt to restore the syncer vnode for + * the mount. + */ +#define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ +#define MNTK_ASYNC 0x00000002 /* filtered async flag */ +#define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */ +#define MNTK_NOINSMNTQ 0x00000008 /* insmntque is not allowed */ +#define MNTK_DRAINING 0x00000010 /* lock draining is happening */ +#define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */ +#define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */ +#define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */ +#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */ +#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */ +#define MNTK_SUSPEND 0x08000000 /* request write suspension */ +#define MNTK_SUSPEND2 0x04000000 /* block secondary writes */ +#define MNTK_SUSPENDED 0x10000000 /* write operations are suspended */ +#define MNTK_MPSAFE 0x20000000 /* Filesystem is MPSAFE. */ +#define MNTK_LOOKUP_SHARED 0x40000000 /* FS supports shared lock lookups */ +#define MNTK_NOKNOTE 0x80000000 /* Don't send KNOTEs from VOP hooks */ + +#define MNT_SHARED_WRITES(mp) (((mp) != NULL) && \ + ((mp)->mnt_kern_flag & MNTK_SHARED_WRITES)) + +/* + * Sysctl CTL_VFS definitions. + * + * Second level identifier specifies which filesystem. Second level + * identifier VFS_VFSCONF returns information about all filesystems. + * Second level identifier VFS_GENERIC is non-terminal. + */ +#define VFS_VFSCONF 0 /* get configured filesystems */ +#define VFS_GENERIC 0 /* generic filesystem information */ +/* + * Third level identifiers for VFS_GENERIC are given below; third + * level identifiers for specific filesystems are given in their + * mount specific header files. + */ +#define VFS_MAXTYPENUM 1 /* int: highest defined filesystem type */ +#define VFS_CONF 2 /* struct: vfsconf for filesystem given + as next argument */ + +/* + * Flags for various system call interfaces. + * + * waitfor flags to vfs_sync() and getfsstat() + */ +#define MNT_WAIT 1 /* synchronously wait for I/O to complete */ +#define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ +#define MNT_LAZY 3 /* push data not written by filesystem syncer */ +#define MNT_SUSPEND 4 /* Suspend file system after sync */ + +/* + * Generic file handle + */ +struct fhandle { + fsid_t fh_fsid; /* Filesystem id of mount point */ + struct fid fh_fid; /* Filesys specific id */ +}; +typedef struct fhandle fhandle_t; + +/* + * Old export arguments without security flavor list + */ +struct oexport_args { + int ex_flags; /* export related flags */ + uid_t ex_root; /* mapping for root uid */ + struct xucred ex_anon; /* mapping for anonymous user */ + struct sockaddr *ex_addr; /* net address to which exported */ + u_char ex_addrlen; /* and the net address length */ + struct sockaddr *ex_mask; /* mask of valid bits in saddr */ + u_char ex_masklen; /* and the smask length */ + char *ex_indexfile; /* index file for WebNFS URLs */ +}; + +/* + * Export arguments for local filesystem mount calls. + */ +#define MAXSECFLAVORS 5 +struct export_args { + int ex_flags; /* export related flags */ + uid_t ex_root; /* mapping for root uid */ + struct xucred ex_anon; /* mapping for anonymous user */ + struct sockaddr *ex_addr; /* net address to which exported */ + u_char ex_addrlen; /* and the net address length */ + struct sockaddr *ex_mask; /* mask of valid bits in saddr */ + u_char ex_masklen; /* and the smask length */ + char *ex_indexfile; /* index file for WebNFS URLs */ + int ex_numsecflavors; /* security flavor count */ + int ex_secflavors[MAXSECFLAVORS]; /* list of security flavors */ +}; + +/* + * Structure holding information for a publicly exported filesystem + * (WebNFS). Currently the specs allow just for one such filesystem. + */ +struct nfs_public { + int np_valid; /* Do we hold valid information */ + fhandle_t np_handle; /* Filehandle for pub fs (internal) */ + struct mount *np_mount; /* Mountpoint of exported fs */ + char *np_index; /* Index file */ +}; + +/* + * Filesystem configuration information. One of these exists for each + * type of filesystem supported by the kernel. These are searched at + * mount time to identify the requested filesystem. + * + * XXX: Never change the first two arguments! + */ +struct vfsconf { + u_int vfc_version; /* ABI version number */ + char vfc_name[MFSNAMELEN]; /* filesystem type name */ + struct vfsops *vfc_vfsops; /* filesystem operations vector */ + int vfc_typenum; /* historic filesystem type number */ + int vfc_refcount; /* number mounted of this type */ + int vfc_flags; /* permanent flags */ + struct vfsoptdecl *vfc_opts; /* mount options */ + TAILQ_ENTRY(vfsconf) vfc_list; /* list of vfscons */ +}; + +/* Userland version of the struct vfsconf. */ +struct xvfsconf { + struct vfsops *vfc_vfsops; /* filesystem operations vector */ + char vfc_name[MFSNAMELEN]; /* filesystem type name */ + int vfc_typenum; /* historic filesystem type number */ + int vfc_refcount; /* number mounted of this type */ + int vfc_flags; /* permanent flags */ + struct vfsconf *vfc_next; /* next in list */ +}; + +#ifndef BURN_BRIDGES +struct ovfsconf { + void *vfc_vfsops; + char vfc_name[32]; + int vfc_index; + int vfc_refcount; + int vfc_flags; +}; +#endif + +/* + * NB: these flags refer to IMPLEMENTATION properties, not properties of + * any actual mounts; i.e., it does not make sense to change the flags. + */ +#define VFCF_STATIC 0x00010000 /* statically compiled into kernel */ +#define VFCF_NETWORK 0x00020000 /* may get data over the network */ +#define VFCF_READONLY 0x00040000 /* writes are not implemented */ +#define VFCF_SYNTHETIC 0x00080000 /* data does not represent real files */ +#define VFCF_LOOPBACK 0x00100000 /* aliases some other mounted FS */ +#define VFCF_UNICODE 0x00200000 /* stores file names as Unicode */ +#define VFCF_JAIL 0x00400000 /* can be mounted from within a jail */ +#define VFCF_DELEGADMIN 0x00800000 /* supports delegated administration */ + +typedef uint32_t fsctlop_t; + +struct vfsidctl { + int vc_vers; /* should be VFSIDCTL_VERS1 (below) */ + fsid_t vc_fsid; /* fsid to operate on */ + char vc_fstypename[MFSNAMELEN]; + /* type of fs 'nfs' or '*' */ + fsctlop_t vc_op; /* operation VFS_CTL_* (below) */ + void *vc_ptr; /* pointer to data structure */ + size_t vc_len; /* sizeof said structure */ + u_int32_t vc_spare[12]; /* spare (must be zero) */ +}; + +/* vfsidctl API version. */ +#define VFS_CTL_VERS1 0x01 + +/* + * New style VFS sysctls, do not reuse/conflict with the namespace for + * private sysctls. + * All "global" sysctl ops have the 33rd bit set: + * 0x...1.... + * Private sysctl ops should have the 33rd bit unset. + */ +#define VFS_CTL_QUERY 0x00010001 /* anything wrong? (vfsquery) */ +#define VFS_CTL_TIMEO 0x00010002 /* set timeout for vfs notification */ +#define VFS_CTL_NOLOCKS 0x00010003 /* disable file locking */ + +struct vfsquery { + u_int32_t vq_flags; + u_int32_t vq_spare[31]; +}; + +/* vfsquery flags */ +#define VQ_NOTRESP 0x0001 /* server down */ +#define VQ_NEEDAUTH 0x0002 /* server bad auth */ +#define VQ_LOWDISK 0x0004 /* we're low on space */ +#define VQ_MOUNT 0x0008 /* new filesystem arrived */ +#define VQ_UNMOUNT 0x0010 /* filesystem has left */ +#define VQ_DEAD 0x0020 /* filesystem is dead, needs force unmount */ +#define VQ_ASSIST 0x0040 /* filesystem needs assistance from external + program */ +#define VQ_NOTRESPLOCK 0x0080 /* server lockd down */ +#define VQ_FLAG0100 0x0100 /* placeholder */ +#define VQ_FLAG0200 0x0200 /* placeholder */ +#define VQ_FLAG0400 0x0400 /* placeholder */ +#define VQ_FLAG0800 0x0800 /* placeholder */ +#define VQ_FLAG1000 0x1000 /* placeholder */ +#define VQ_FLAG2000 0x2000 /* placeholder */ +#define VQ_FLAG4000 0x4000 /* placeholder */ +#define VQ_FLAG8000 0x8000 /* placeholder */ + +#ifdef _KERNEL +/* Point a sysctl request at a vfsidctl's data. */ +#define VCTLTOREQ(vc, req) \ + do { \ + (req)->newptr = (vc)->vc_ptr; \ + (req)->newlen = (vc)->vc_len; \ + (req)->newidx = 0; \ + } while (0) +#endif + +struct iovec; +struct uio; + +#ifdef _KERNEL + +/* + * vfs_busy specific flags and mask. + */ +#define MBF_NOWAIT 0x01 +#define MBF_MNTLSTLOCK 0x02 +#define MBF_MASK (MBF_NOWAIT | MBF_MNTLSTLOCK) + +#ifdef MALLOC_DECLARE +MALLOC_DECLARE(M_MOUNT); +#endif +extern int maxvfsconf; /* highest defined filesystem type */ +extern int nfs_mount_type; /* vfc_typenum for nfs, or -1 */ + +TAILQ_HEAD(vfsconfhead, vfsconf); +extern struct vfsconfhead vfsconf; + +/* + * Operations supported on mounted filesystem. + */ +struct mount_args; +struct nameidata; +struct sysctl_req; +struct mntarg; + +typedef int vfs_cmount_t(struct mntarg *ma, void *data, int flags); +typedef int vfs_unmount_t(struct mount *mp, int mntflags); +typedef int vfs_root_t(struct mount *mp, int flags, struct vnode **vpp); +typedef int vfs_quotactl_t(struct mount *mp, int cmds, uid_t uid, void *arg); +typedef int vfs_statfs_t(struct mount *mp, struct statfs *sbp); +typedef int vfs_sync_t(struct mount *mp, int waitfor); +typedef int vfs_vget_t(struct mount *mp, ino_t ino, int flags, + struct vnode **vpp); +typedef int vfs_fhtovp_t(struct mount *mp, struct fid *fhp, struct vnode **vpp); +typedef int vfs_checkexp_t(struct mount *mp, struct sockaddr *nam, + int *extflagsp, struct ucred **credanonp, + int *numsecflavors, int **secflavors); +typedef int vfs_init_t(struct vfsconf *); +typedef int vfs_uninit_t(struct vfsconf *); +typedef int vfs_extattrctl_t(struct mount *mp, int cmd, + struct vnode *filename_vp, int attrnamespace, + const char *attrname); +typedef int vfs_mount_t(struct mount *mp); +typedef int vfs_sysctl_t(struct mount *mp, fsctlop_t op, + struct sysctl_req *req); +typedef void vfs_susp_clean_t(struct mount *mp); + +struct vfsops { + vfs_mount_t *vfs_mount; + vfs_cmount_t *vfs_cmount; + vfs_unmount_t *vfs_unmount; + vfs_root_t *vfs_root; + vfs_quotactl_t *vfs_quotactl; + vfs_statfs_t *vfs_statfs; + vfs_sync_t *vfs_sync; + vfs_vget_t *vfs_vget; + vfs_fhtovp_t *vfs_fhtovp; + vfs_checkexp_t *vfs_checkexp; + vfs_init_t *vfs_init; + vfs_uninit_t *vfs_uninit; + vfs_extattrctl_t *vfs_extattrctl; + vfs_sysctl_t *vfs_sysctl; + vfs_susp_clean_t *vfs_susp_clean; +}; + +vfs_statfs_t __vfs_statfs; + +#define VFS_MOUNT(MP) (*(MP)->mnt_op->vfs_mount)(MP) +#define VFS_UNMOUNT(MP, FORCE) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE) +#define VFS_ROOT(MP, FLAGS, VPP) \ + (*(MP)->mnt_op->vfs_root)(MP, FLAGS, VPP) +#define VFS_QUOTACTL(MP, C, U, A) \ + (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A) +#define VFS_STATFS(MP, SBP) __vfs_statfs((MP), (SBP)) +#define VFS_SYNC(MP, WAIT) (*(MP)->mnt_op->vfs_sync)(MP, WAIT) +#define VFS_VGET(MP, INO, FLAGS, VPP) \ + (*(MP)->mnt_op->vfs_vget)(MP, INO, FLAGS, VPP) +#define VFS_FHTOVP(MP, FIDP, VPP) \ + (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, VPP) +#define VFS_CHECKEXP(MP, NAM, EXFLG, CRED, NUMSEC, SEC) \ + (*(MP)->mnt_op->vfs_checkexp)(MP, NAM, EXFLG, CRED, NUMSEC, SEC) +#define VFS_EXTATTRCTL(MP, C, FN, NS, N) \ + (*(MP)->mnt_op->vfs_extattrctl)(MP, C, FN, NS, N) +#define VFS_SYSCTL(MP, OP, REQ) \ + (*(MP)->mnt_op->vfs_sysctl)(MP, OP, REQ) +#define VFS_SUSP_CLEAN(MP) \ + ({if (*(MP)->mnt_op->vfs_susp_clean != NULL) \ + (*(MP)->mnt_op->vfs_susp_clean)(MP); }) + +#define VFS_NEEDSGIANT_(MP) \ + ((MP) != NULL && ((MP)->mnt_kern_flag & MNTK_MPSAFE) == 0) + +#define VFS_NEEDSGIANT(MP) __extension__ \ +({ \ + struct mount *_mp; \ + _mp = (MP); \ + VFS_NEEDSGIANT_(_mp); \ +}) + +#define VFS_LOCK_GIANT(MP) __extension__ \ +({ \ + int _locked; \ + struct mount *_mp; \ + _mp = (MP); \ + if (VFS_NEEDSGIANT_(_mp)) { \ + mtx_lock(&Giant); \ + _locked = 1; \ + } else \ + _locked = 0; \ + _locked; \ +}) +#define VFS_UNLOCK_GIANT(locked) if ((locked)) mtx_unlock(&Giant); +#define VFS_ASSERT_GIANT(MP) do \ +{ \ + struct mount *_mp; \ + _mp = (MP); \ + if (VFS_NEEDSGIANT_(_mp)) \ + mtx_assert(&Giant, MA_OWNED); \ +} while (0) + +#define VFS_KNOTE_LOCKED(vp, hint) do \ +{ \ + if (((vp)->v_vflag & VV_NOKNOTE) == 0) \ + VN_KNOTE((vp), (hint), KNF_LISTLOCKED); \ +} while (0) + +#define VFS_KNOTE_UNLOCKED(vp, hint) do \ +{ \ + if (((vp)->v_vflag & VV_NOKNOTE) == 0) \ + VN_KNOTE((vp), (hint), 0); \ +} while (0) + +#include <rtems/freebsd/sys/module.h> + +/* + * Version numbers. + */ +#define VFS_VERSION_00 0x19660120 +#define VFS_VERSION VFS_VERSION_00 + +#define VFS_SET(vfsops, fsname, flags) \ + static struct vfsconf fsname ## _vfsconf = { \ + .vfc_version = VFS_VERSION, \ + .vfc_name = #fsname, \ + .vfc_vfsops = &vfsops, \ + .vfc_typenum = -1, \ + .vfc_flags = flags, \ + }; \ + static moduledata_t fsname ## _mod = { \ + #fsname, \ + vfs_modevent, \ + & fsname ## _vfsconf \ + }; \ + DECLARE_MODULE(fsname, fsname ## _mod, SI_SUB_VFS, SI_ORDER_MIDDLE) + +extern char *mountrootfsname; + +/* + * exported vnode operations + */ + +int dounmount(struct mount *, int, struct thread *); + +int kernel_mount(struct mntarg *ma, int flags); +int kernel_vmount(int flags, ...); +struct mntarg *mount_arg(struct mntarg *ma, const char *name, const void *val, int len); +struct mntarg *mount_argb(struct mntarg *ma, int flag, const char *name); +struct mntarg *mount_argf(struct mntarg *ma, const char *name, const char *fmt, ...); +struct mntarg *mount_argsu(struct mntarg *ma, const char *name, const void *val, int len); +void statfs_scale_blocks(struct statfs *sf, long max_size); +struct vfsconf *vfs_byname(const char *); +struct vfsconf *vfs_byname_kld(const char *, struct thread *td, int *); +void vfs_mount_destroy(struct mount *); +void vfs_event_signal(fsid_t *, u_int32_t, intptr_t); +void vfs_freeopts(struct vfsoptlist *opts); +void vfs_deleteopt(struct vfsoptlist *opts, const char *name); +int vfs_buildopts(struct uio *auio, struct vfsoptlist **options); +int vfs_flagopt(struct vfsoptlist *opts, const char *name, u_int *w, u_int val); +int vfs_getopt(struct vfsoptlist *, const char *, void **, int *); +int vfs_getopt_pos(struct vfsoptlist *opts, const char *name); +char *vfs_getopts(struct vfsoptlist *, const char *, int *error); +int vfs_copyopt(struct vfsoptlist *, const char *, void *, int); +int vfs_filteropt(struct vfsoptlist *, const char **legal); +void vfs_opterror(struct vfsoptlist *opts, const char *fmt, ...); +int vfs_scanopt(struct vfsoptlist *opts, const char *name, const char *fmt, ...); +int vfs_setopt(struct vfsoptlist *opts, const char *name, void *value, + int len); +int vfs_setopt_part(struct vfsoptlist *opts, const char *name, void *value, + int len); +int vfs_setopts(struct vfsoptlist *opts, const char *name, + const char *value); +int vfs_setpublicfs /* set publicly exported fs */ + (struct mount *, struct netexport *, struct export_args *); +void vfs_msync(struct mount *, int); +int vfs_busy(struct mount *, int); +int vfs_export /* process mount export info */ + (struct mount *, struct export_args *); +int vfs_allocate_syncvnode(struct mount *); +int vfs_donmount(struct thread *td, int fsflags, struct uio *fsoptions); +void vfs_getnewfsid(struct mount *); +struct cdev *vfs_getrootfsid(struct mount *); +struct mount *vfs_getvfs(fsid_t *); /* return vfs given fsid */ +struct mount *vfs_busyfs(fsid_t *); +int vfs_modevent(module_t, int, void *); +void vfs_mount_error(struct mount *, const char *, ...); +void vfs_mountroot(void); /* mount our root filesystem */ +void vfs_mountedfrom(struct mount *, const char *from); +void vfs_oexport_conv(const struct oexport_args *oexp, + struct export_args *exp); +void vfs_ref(struct mount *); +void vfs_rel(struct mount *); +struct mount *vfs_mount_alloc(struct vnode *, struct vfsconf *, const char *, + struct ucred *); +int vfs_suser(struct mount *, struct thread *); +void vfs_unbusy(struct mount *); +void vfs_unmountall(void); +extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ +extern struct mtx mountlist_mtx; +extern struct nfs_public nfs_pub; + +/* + * Declarations for these vfs default operations are located in + * kern/vfs_default.c, they should be used instead of making "dummy" + * functions or casting entries in the VFS op table to "enopnotsupp()". + */ +vfs_root_t vfs_stdroot; +vfs_quotactl_t vfs_stdquotactl; +vfs_statfs_t vfs_stdstatfs; +vfs_sync_t vfs_stdsync; +vfs_sync_t vfs_stdnosync; +vfs_vget_t vfs_stdvget; +vfs_fhtovp_t vfs_stdfhtovp; +vfs_checkexp_t vfs_stdcheckexp; +vfs_init_t vfs_stdinit; +vfs_uninit_t vfs_stduninit; +vfs_extattrctl_t vfs_stdextattrctl; +vfs_sysctl_t vfs_stdsysctl; + +#else /* !_KERNEL */ + +#include <rtems/freebsd/sys/cdefs.h> + +struct stat; + +__BEGIN_DECLS +int fhopen(const struct fhandle *, int); +int fhstat(const struct fhandle *, struct stat *); +int fhstatfs(const struct fhandle *, struct statfs *); +int fstatfs(int, struct statfs *); +int getfh(const char *, fhandle_t *); +int getfsstat(struct statfs *, long, int); +int getmntinfo(struct statfs **, int); +int lgetfh(const char *, fhandle_t *); +int mount(const char *, const char *, int, void *); +int nmount(struct iovec *, unsigned int, int); +int statfs(const char *, struct statfs *); +int unmount(const char *, int); + +/* C library stuff */ +int getvfsbyname(const char *, struct xvfsconf *); +__END_DECLS + +#endif /* _KERNEL */ + +#endif /* !_SYS_MOUNT_HH_ */ |