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freebsd-nq/sys/gnu/fs/xfs/FreeBSD/xfs_vnops.c
Konstantin Belousov d6da640860 Fix r193923 by noting that type of a_fp is struct file *, not int. 
It was assumed that r193923 was trivial change that cannot be done
wrong.

MFC after:	2 weeks
2009-06-10 14:24:31 +00:00

1691 lines
36 KiB
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/*
* Copyright (c) 2001, Alexander Kabaev
* Copyright (c) 2006, Russell Cattelan Digital Elves Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/kernel.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#include <sys/dirent.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
#include <sys/extattr.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/vnode_pager.h>
#include <fs/fifofs/fifo.h>
#define NO_VFS_MACROS
#include "xfs.h"
#include "xfs_types.h"
#include "xfs_bit.h"
#include "xfs_inum.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_alloc_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_btree.h"
#include "xfs_imap.h"
#include "xfs_attr.h"
#include "xfs_attr_sf.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_dinode.h"
#include "xfs_ialloc.h"
#include "xfs_alloc.h"
#include "xfs_inode.h"
#include "xfs_inode_item.h"
#include "xfs_acl.h"
#include "xfs_cap.h"
#include "xfs_mac.h"
#include "xfs_iomap.h"
#include "xfs_clnt.h"
#include "xfs_mountops.h"
/*
* Prototypes for XFS vnode operations.
*/
static vop_access_t _xfs_access;
static vop_advlock_t _xfs_advlock;
static vop_bmap_t _xfs_bmap;
static vop_cachedlookup_t _xfs_cachedlookup;
static vop_close_t _xfs_close;
static vop_create_t _xfs_create;
static vop_deleteextattr_t _xfs_deleteextattr;
static vop_fsync_t _xfs_fsync;
static vop_getattr_t _xfs_getattr;
static vop_getextattr_t _xfs_getextattr;
static vop_inactive_t _xfs_inactive;
static vop_ioctl_t _xfs_ioctl;
static vop_link_t _xfs_link;
static vop_listextattr_t _xfs_listextattr;
static vop_mkdir_t _xfs_mkdir;
static vop_mknod_t _xfs_mknod;
static vop_open_t _xfs_open;
static vop_read_t _xfs_read;
static vop_readdir_t _xfs_readdir;
static vop_readlink_t _xfs_readlink;
static vop_reclaim_t _xfs_reclaim;
static vop_remove_t _xfs_remove;
static vop_rename_t _xfs_rename;
static vop_rmdir_t _xfs_rmdir;
static vop_setattr_t _xfs_setattr;
static vop_setextattr_t _xfs_setextattr;
static vop_strategy_t _xfs_strategy;
static vop_symlink_t _xfs_symlink;
static vop_write_t _xfs_write;
static vop_vptofh_t _xfs_vptofh;
struct vop_vector xfs_vnops = {
.vop_default = &default_vnodeops,
.vop_access = _xfs_access,
.vop_advlock = _xfs_advlock,
.vop_bmap = _xfs_bmap,
.vop_cachedlookup = _xfs_cachedlookup,
.vop_close = _xfs_close,
.vop_create = _xfs_create,
.vop_deleteextattr = _xfs_deleteextattr,
.vop_fsync = _xfs_fsync,
.vop_getattr = _xfs_getattr,
.vop_getextattr = _xfs_getextattr,
.vop_inactive = _xfs_inactive,
.vop_ioctl = _xfs_ioctl,
.vop_link = _xfs_link,
.vop_listextattr = _xfs_listextattr,
.vop_lookup = vfs_cache_lookup,
.vop_mkdir = _xfs_mkdir,
.vop_mknod = _xfs_mknod,
.vop_open = _xfs_open,
.vop_read = _xfs_read,
.vop_readdir = _xfs_readdir,
.vop_readlink = _xfs_readlink,
.vop_reclaim = _xfs_reclaim,
.vop_remove = _xfs_remove,
.vop_rename = _xfs_rename,
.vop_rmdir = _xfs_rmdir,
.vop_setattr = _xfs_setattr,
.vop_setextattr = _xfs_setextattr,
.vop_strategy = _xfs_strategy,
.vop_symlink = _xfs_symlink,
.vop_write = _xfs_write,
.vop_vptofh = _xfs_vptofh,
};
/*
* FIFO's specific operations.
*/
static vop_close_t _xfsfifo_close;
static vop_read_t _xfsfifo_read;
static vop_kqfilter_t _xfsfifo_kqfilter;
static vop_write_t _xfsfifo_write;
struct vop_vector xfs_fifoops = {
.vop_default = &fifo_specops,
.vop_access = _xfs_access,
.vop_close = _xfsfifo_close,
.vop_fsync = _xfs_fsync,
.vop_getattr = _xfs_getattr,
.vop_inactive = _xfs_inactive,
.vop_kqfilter = _xfsfifo_kqfilter,
.vop_read = _xfsfifo_read,
.vop_reclaim = _xfs_reclaim,
.vop_setattr = _xfs_setattr,
.vop_write = _xfsfifo_write,
.vop_vptofh = _xfs_vptofh,
};
static int
_xfs_access(
struct vop_access_args /* {
struct vnode *a_vp;
accmode_t a_accmode;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
int error;
XVOP_ACCESS(VPTOXFSVP(ap->a_vp), ap->a_accmode, ap->a_cred, error);
return (error);
}
static int
_xfs_open(
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *a_td;
struct file *a_fp;
} */ *ap)
{
int error;
XVOP_OPEN(VPTOXFSVP(ap->a_vp), ap->a_cred, error);
if (error == 0)
vnode_create_vobject(ap->a_vp, 0, ap->a_td);
return (error);
}
static int
_xfs_close(
struct vop_close_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
int error = 0;
/* XVOP_CLOSE(VPTOXFSVP(ap->a_vp), NULL, error); */
return (error);
}
static int
_xfs_getattr(
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;
struct mount *mp;
xfs_vattr_t va;
int error;
/* extract the xfs vnode from the private data */
//xfs_vnode_t *xvp = (xfs_vnode_t *)vp->v_data;
memset(&va,0,sizeof(xfs_vattr_t));
va.va_mask = XFS_AT_STAT|XFS_AT_GENCOUNT|XFS_AT_XFLAGS;
XVOP_GETATTR(VPTOXFSVP(vp), &va, 0, ap->a_cred, error);
if (error)
return (error);
mp = vp->v_mount;
vap->va_type = IFTOVT(((xfs_vnode_t *)vp->v_data)->v_inode->i_d.di_mode);
vap->va_mode = va.va_mode;
vap->va_nlink = va.va_nlink;
vap->va_uid = va.va_uid;
vap->va_gid = va.va_gid;
vap->va_fsid = mp->mnt_stat.f_fsid.val[0];
vap->va_fileid = va.va_nodeid;
vap->va_size = va.va_size;
vap->va_blocksize = va.va_blocksize;
vap->va_atime = va.va_atime;
vap->va_mtime = va.va_mtime;
vap->va_ctime = va.va_ctime;
vap->va_gen = va.va_gen;
vap->va_rdev = va.va_rdev;
vap->va_bytes = (va.va_nblocks << BBSHIFT);
/* XFS now supports devices that have block sizes
* other than 512 so BBSHIFT will work for now
* but need to get this value from the super block
*/
/*
* Fields with no direct equivalent in XFS
*/
vap->va_filerev = 0;
vap->va_flags = 0;
return (0);
}
static int
_xfs_setattr(
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;
xfs_vattr_t va;
int error;
/*
* Check for unsettable attributes.
*/
#ifdef RMC
if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
(vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
(vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL))
return (EINVAL);
#endif
memset(&va, 0, sizeof(va));
if (vap->va_uid != (uid_t)VNOVAL) {
va.va_mask |= XFS_AT_UID;
va.va_uid = vap->va_uid;
}
if (vap->va_gid != (gid_t)VNOVAL) {
va.va_mask |= XFS_AT_GID;
va.va_gid = vap->va_gid;
}
if (vap->va_size != VNOVAL) {
va.va_mask |= XFS_AT_SIZE;
va.va_size = vap->va_size;
}
if (vap->va_atime.tv_sec != VNOVAL) {
va.va_mask |= XFS_AT_ATIME;
va.va_atime = vap->va_atime;
}
if (vap->va_mtime.tv_sec != VNOVAL) {
va.va_mask |= XFS_AT_MTIME;
va.va_mtime = vap->va_mtime;
}
if (vap->va_ctime.tv_sec != VNOVAL) {
va.va_mask |= XFS_AT_CTIME;
va.va_ctime = vap->va_ctime;
}
if (vap->va_mode != (mode_t)VNOVAL) {
va.va_mask |= XFS_AT_MODE;
va.va_mode = vap->va_mode;
}
XVOP_SETATTR(VPTOXFSVP(vp), &va, 0, ap->a_cred, error);
return (error);
}
static int
_xfs_inactive(
struct vop_inactive_args /* {
struct vnode *a_vp;
struct thread *a_td;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;
int error;
XVOP_INACTIVE(VPTOXFSVP(vp), td->td_ucred, error);
return (error);
}
static int
_xfs_read(
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int error;
switch (vp->v_type) {
case VREG:
break;
case VDIR:
return (EISDIR);
default:
return (EPERM);
};
XVOP_READ(VPTOXFSVP(vp), uio, ap->a_ioflag, ap->a_cred, error);
return error;
}
int
xfs_read_file(xfs_mount_t *mp, xfs_inode_t *ip, struct uio *uio, int ioflag)
{
xfs_fileoff_t lbn, nextlbn;
xfs_fsize_t bytesinfile;
long size, xfersize, blkoffset;
struct buf *bp;
struct vnode *vp;
int error, orig_resid;
int seqcount;
seqcount = ioflag >> IO_SEQSHIFT;
orig_resid = uio->uio_resid;
if (orig_resid <= 0)
return (0);
vp = XFS_ITOV(ip)->v_vnode;
/*
* Ok so we couldn't do it all in one vm trick...
* so cycle around trying smaller bites..
*/
for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) {
if ((bytesinfile = ip->i_d.di_size - uio->uio_offset) <= 0)
break;
lbn = XFS_B_TO_FSBT(mp, uio->uio_offset);
nextlbn = lbn + 1;
/*
* size of buffer. The buffer representing the
* end of the file is rounded up to the size of
* the block type ( fragment or full block,
* depending ).
*/
size = mp->m_sb.sb_blocksize;
blkoffset = XFS_B_FSB_OFFSET(mp, uio->uio_offset);
/*
* The amount we want to transfer in this iteration is
* one FS block less the amount of the data before
* our startpoint (duh!)
*/
xfersize = mp->m_sb.sb_blocksize - blkoffset;
/*
* But if we actually want less than the block,
* or the file doesn't have a whole block more of data,
* then use the lesser number.
*/
if (uio->uio_resid < xfersize)
xfersize = uio->uio_resid;
if (bytesinfile < xfersize)
xfersize = bytesinfile;
if (XFS_FSB_TO_B(mp, nextlbn) >= ip->i_d.di_size ) {
/*
* Don't do readahead if this is the end of the file.
*/
error = bread(vp, lbn, size, NOCRED, &bp);
} else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
/*
* Otherwise if we are allowed to cluster,
* grab as much as we can.
*
* XXX This may not be a win if we are not
* doing sequential access.
*/
error = cluster_read(vp, ip->i_d.di_size, lbn,
size, NOCRED, uio->uio_resid, seqcount, &bp);
} else if (seqcount > 1) {
/*
* If we are NOT allowed to cluster, then
* if we appear to be acting sequentially,
* fire off a request for a readahead
* as well as a read. Note that the 4th and 5th
* arguments point to arrays of the size specified in
* the 6th argument.
*/
int nextsize = mp->m_sb.sb_blocksize;
error = breadn(vp, lbn,
size, &nextlbn, &nextsize, 1, NOCRED, &bp);
} else {
/*
* Failing all of the above, just read what the
* user asked for. Interestingly, the same as
* the first option above.
*/
error = bread(vp, lbn, size, NOCRED, &bp);
}
if (error) {
brelse(bp);
bp = NULL;
break;
}
/*
* If IO_DIRECT then set B_DIRECT for the buffer. This
* will cause us to attempt to release the buffer later on
* and will cause the buffer cache to attempt to free the
* underlying pages.
*/
if (ioflag & IO_DIRECT)
bp->b_flags |= B_DIRECT;
/*
* We should only get non-zero b_resid when an I/O error
* has occurred, which should cause us to break above.
* However, if the short read did not cause an error,
* then we want to ensure that we do not uiomove bad
* or uninitialized data.
*/
size -= bp->b_resid;
if (size < xfersize) {
if (size == 0)
break;
xfersize = size;
}
/*
* otherwise use the general form
*/
error = uiomove((char *)bp->b_data + blkoffset,
(int)xfersize, uio);
if (error)
break;
if (ioflag & (IO_VMIO|IO_DIRECT) ) {
/*
* If there are no dependencies, and it's VMIO,
* then we don't need the buf, mark it available
* for freeing. The VM has the data.
*/
bp->b_flags |= B_RELBUF;
brelse(bp);
} else {
/*
* Otherwise let whoever
* made the request take care of
* freeing it. We just queue
* it onto another list.
*/
bqrelse(bp);
}
}
/*
* This can only happen in the case of an error
* because the loop above resets bp to NULL on each iteration
* and on normal completion has not set a new value into it.
* so it must have come from a 'break' statement
*/
if (bp != NULL) {
if (ioflag & (IO_VMIO|IO_DIRECT)) {
bp->b_flags |= B_RELBUF;
brelse(bp);
} else
bqrelse(bp);
}
return (error);
}
static int
_xfs_write(struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int ioflag = ap->a_ioflag;
int error;
xfs_vnode_t *xvp = (xfs_vnode_t *)vp->v_data;
error = xfs_write(xvp->v_bh.bh_first, uio, ioflag, ap->a_cred);
if (error < 0) {
printf("Xfs_write got error %d\n",error);
return -error;
}
return 0;
}
int
xfs_write_file(xfs_inode_t *xip, struct uio *uio, int ioflag)
{
struct buf *bp;
//struct thread *td;
daddr_t lbn;
off_t osize = 0;
off_t offset= 0;
int blkoffset, error, resid, xfersize;
int fsblocksize;
int seqcount;
xfs_iomap_t iomap;
int maps = 1;
xfs_vnode_t *xvp = XFS_ITOV(xip);
struct vnode *vp = xvp->v_vnode;
xfs_mount_t *mp = (&xip->i_iocore)->io_mount;
seqcount = ioflag >> IO_SEQSHIFT;
memset(&iomap,0,sizeof(xfs_iomap_t));
/*
* Maybe this should be above the vnode op call, but so long as
* file servers have no limits, I don't think it matters.
*/
#if 0
td = uio->uio_td;
if (vp->v_type == VREG && td != NULL) {
PROC_LOCK(td->td_proc);
if (uio->uio_offset + uio->uio_resid >
lim_cur(td->td_proc, RLIMIT_FSIZE)) {
psignal(td->td_proc, SIGXFSZ);
PROC_UNLOCK(td->td_proc);
return (EFBIG);
}
PROC_UNLOCK(td->td_proc);
}
#endif
resid = uio->uio_resid;
offset = uio->uio_offset;
osize = xip->i_d.di_size;
/* xfs bmap wants bytes for both offset and size */
XVOP_BMAP(xvp,
uio->uio_offset,
uio->uio_resid,
BMAPI_WRITE|BMAPI_DIRECT,
&iomap, &maps, error);
if(error) {
printf("XVOP_BMAP failed\n");
goto error;
}
for (error = 0; uio->uio_resid > 0;) {
lbn = XFS_B_TO_FSBT(mp, offset);
blkoffset = XFS_B_FSB_OFFSET(mp, offset);
xfersize = mp->m_sb.sb_blocksize - blkoffset;
fsblocksize = mp->m_sb.sb_blocksize;
if (uio->uio_resid < xfersize)
xfersize = uio->uio_resid;
/*
* getblk sets buf by blkno * bo->bo_bsize
* bo_bsize is set from the mnt point fsize
* so we call getblk in the case using fsblocks
* not basic blocks
*/
bp = getblk(vp, lbn, fsblocksize, 0, 0, 0);
if(!bp) {
printf("getblk failed\n");
error = EINVAL;
break;
}
if (!(bp->b_flags & B_CACHE) && fsblocksize > xfersize)
vfs_bio_clrbuf(bp);
if (offset + xfersize > xip->i_d.di_size) {
xip->i_d.di_size = offset + xfersize;
vnode_pager_setsize(vp, offset + fsblocksize);
}
/* move the offset for the next itteration of the loop */
offset += xfersize;
error = uiomove((char *)bp->b_data + blkoffset, xfersize, uio);
if ((ioflag & IO_VMIO) &&
(LIST_FIRST(&bp->b_dep) == NULL)) /* in ext2fs? */
bp->b_flags |= B_RELBUF;
/* force to full direct for now */
bp->b_flags |= B_DIRECT;
/* and sync ... the delay path is not pushing data out */
ioflag |= IO_SYNC;
if (ioflag & IO_SYNC) {
(void)bwrite(bp);
} else if (0 /* RMC xfersize + blkoffset == fs->s_frag_size */) {
if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) {
bp->b_flags |= B_CLUSTEROK;
cluster_write(vp, bp, osize, seqcount);
} else {
bawrite(bp);
}
} else {
bp->b_flags |= B_CLUSTEROK;
bdwrite(bp);
}
if (error || xfersize == 0)
break;
}
/*
* If we successfully wrote any data, and we are not the superuser
* we clear the setuid and setgid bits as a precaution against
* tampering.
*/
#if 0
if (resid > uio->uio_resid && ap->a_cred && ap->a_cred->cr_uid != 0)
ip->i_mode &= ~(ISUID | ISGID);
#endif
if (error) {
if (ioflag & IO_UNIT) {
#if 0
(void)ext2_truncate(vp, osize,
ioflag & IO_SYNC, ap->a_cred, uio->uio_td);
#endif
uio->uio_offset -= resid - uio->uio_resid;
uio->uio_resid = resid;
}
} else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) {
/* Update the vnode here? */
}
error:
return error;
}
static int
_xfs_create(
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap)
{
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct thread *td = curthread;
struct ucred *credp = td->td_ucred;
struct componentname *cnp = ap->a_cnp;
xfs_vnode_t *xvp;
xfs_vattr_t va;
int error;
memset(&va, 0, sizeof (va));
va.va_mask |= XFS_AT_MODE;
va.va_mode = vap->va_mode;
va.va_mask |= XFS_AT_TYPE;
va.va_mode |= VTTOIF(vap->va_type);
xvp = NULL;
XVOP_CREATE(VPTOXFSVP(dvp), cnp, &va, &xvp, credp, error);
if (error == 0) {
*ap->a_vpp = xvp->v_vnode;
VOP_LOCK(xvp->v_vnode, LK_EXCLUSIVE);
}
return (error);
}
extern int xfs_remove(bhv_desc_t *, bhv_desc_t *, vname_t *, cred_t *);
static int
_xfs_remove(
struct vop_remove_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_dvp;
struct vnode * a_vp;
struct componentname * a_cnp;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct thread *td = curthread;
struct ucred *credp = td->td_ucred;
/*
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
*/
int error;
if (vp->v_type == VDIR || vp->v_usecount != 1)
return (EPERM);
error = xfs_remove(VPTOXFSVP(ap->a_dvp)->v_bh.bh_first,
VPTOXFSVP(ap->a_vp)->v_bh.bh_first,
ap->a_cnp,credp);
cache_purge(vp);
return error;
}
static int
_xfs_rename(
struct vop_rename_args /* {
struct vnode *a_fdvp;
struct vnode *a_fvp;
struct componentname *a_fcnp;
struct vnode *a_tdvp;
struct vnode *a_tvp;
struct componentname *a_tcnp;
} */ *ap)
{
struct vnode *fvp = ap->a_fvp;
struct vnode *tvp = ap->a_tvp;
struct vnode *fdvp = ap->a_fdvp;
struct vnode *tdvp = ap->a_tdvp;
/* struct componentname *tcnp = ap->a_tcnp; */
/* struct componentname *fcnp = ap->a_fcnp;*/
int error = EPERM;
if (error)
goto out;
/* Check for cross-device rename */
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out;
}
if (tvp && tvp->v_usecount > 1) {
error = EBUSY;
goto out;
}
if (fvp->v_type == VDIR) {
if (tvp != NULL && tvp->v_type == VDIR)
cache_purge(tdvp);
cache_purge(fdvp);
}
out:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
vgone(fvp);
if (tvp)
vgone(tvp);
return (error);
}
static int
_xfs_link(
struct vop_link_args /* {
struct vnode *a_tdvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap)
{
xfs_vnode_t *tdvp, *vp;
int error;
tdvp = VPTOXFSVP(ap->a_tdvp);
vp = VPTOXFSVP(ap->a_vp);
XVOP_LINK(tdvp, vp, ap->a_cnp, NULL, error);
return (error);
}
static int
_xfs_symlink(
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap)
{
struct thread *td = curthread;
struct ucred *credp = td->td_ucred;
xfs_vnode_t *xvp;
xfs_vattr_t va;
int error;
memset(&va, 0, sizeof (va));
va.va_mask |= XFS_AT_MODE;
va.va_mode = ap->a_vap->va_mode | S_IFLNK;
va.va_mask |= XFS_AT_TYPE;
XVOP_SYMLINK(VPTOXFSVP(ap->a_dvp), ap->a_cnp, &va, ap->a_target,
&xvp, credp, error);
if (error == 0) {
*ap->a_vpp = xvp->v_vnode;
VOP_LOCK(xvp->v_vnode, LK_EXCLUSIVE);
}
return (error);
}
static int
_xfs_mknod(
struct vop_mknod_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap)
{
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct thread *td = curthread;
struct ucred *credp = td->td_ucred;
struct componentname *cnp = ap->a_cnp;
xfs_vnode_t *xvp;
xfs_vattr_t va;
int error;
memset(&va, 0, sizeof (va));
va.va_mask |= XFS_AT_MODE;
va.va_mode = vap->va_mode | S_IFIFO;
va.va_mask |= XFS_AT_TYPE;
va.va_mask |= XFS_AT_RDEV;
va.va_rdev = vap->va_rdev;
xvp = NULL;
XVOP_CREATE(VPTOXFSVP(dvp), cnp, &va, &xvp, credp, error);
if (error == 0) {
*ap->a_vpp = xvp->v_vnode;
VOP_LOCK(xvp->v_vnode, LK_EXCLUSIVE);
}
return (error);
}
static int
_xfs_mkdir(
struct vop_mkdir_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap)
{
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct thread *td = curthread;
struct ucred *credp = td->td_ucred;
struct componentname *cnp = ap->a_cnp;
xfs_vnode_t *xvp;
xfs_vattr_t va;
int error;
memset(&va, 0, sizeof (va));
va.va_mask |= XFS_AT_MODE;
va.va_mode = vap->va_mode | S_IFDIR;
va.va_mask |= XFS_AT_TYPE;
xvp = NULL;
XVOP_MKDIR(VPTOXFSVP(dvp), cnp, &va, &xvp, credp, error);
if (error == 0) {
*ap->a_vpp = xvp->v_vnode;
VOP_LOCK(xvp->v_vnode, LK_EXCLUSIVE);
}
return (error);
}
static int
_xfs_rmdir(
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
/* struct componentname *cnp = ap->a_cnp; */
int error;
if (dvp == vp)
return (EINVAL);
error = EPERM;
return (error);
}
static int
_xfs_readdir(
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_eofflag;
int *a_ncookies;
u_long **a_cookies;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int error;
off_t off;
int eof = 0;
if (vp->v_type != VDIR)
return (EPERM);
if (ap->a_ncookies) {
return (EOPNOTSUPP);
}
error = 0;
while (!eof){
off = (int)uio->uio_offset;
XVOP_READDIR(VPTOXFSVP(vp), uio, NULL, &eof, error);
if ((uio->uio_offset == off) || error) {
break;
}
}
if (ap->a_eofflag)
*ap->a_eofflag = (eof != 0);
return (error);
}
static int
_xfs_readlink(
struct vop_readlink_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
struct ucred *cred = ap->a_cred;
int error;
XVOP_READLINK(VPTOXFSVP(vp), uio, 0, cred, error);
return (error);
}
static int
_xfs_fsync(
struct vop_fsync_args /* {
struct vnode * a_vp;
int a_waitfor;
struct thread * a_td;
} */ *ap)
{
xfs_vnode_t *vp = VPTOXFSVP(ap->a_vp);
int flags = FSYNC_DATA;
int error;
if (ap->a_waitfor == MNT_WAIT)
flags |= FSYNC_WAIT;
XVOP_FSYNC(vp, flags, ap->a_td->td_ucred, (xfs_off_t)0, (xfs_off_t)-1, error);
return (error);
}
static int
_xfs_bmap(
struct vop_bmap_args /* {
struct vnode *a_vp;
daddr_t a_bn;
struct bufobj **a_bop;
daddr_t *a_bnp;
int *a_runp;
int *a_runb;
} */ *ap)
{
xfs_iomap_t iomap;
xfs_off_t offset;
ssize_t size;
struct mount *mp;
struct xfs_mount *xmp;
struct xfs_vnode *xvp;
int error, maxrun, retbm;
mp = ap->a_vp->v_mount;
xmp = XFS_VFSTOM(MNTTOVFS(mp));
if (ap->a_bop != NULL)
*ap->a_bop = &xmp->m_ddev_targp->specvp->v_bufobj;
if (ap->a_bnp == NULL)
return (0);
xvp = VPTOXFSVP(ap->a_vp);
retbm = 1;
offset = XFS_FSB_TO_B(xmp, ap->a_bn);
size = XFS_FSB_TO_B(xmp, 1);
XVOP_BMAP(xvp, offset, size, BMAPI_READ, &iomap, &retbm, error);
if (error)
return (error);
if (retbm == 0 || iomap.iomap_bn == IOMAP_DADDR_NULL) {
*ap->a_bnp = (daddr_t)-1;
if (ap->a_runb)
*ap->a_runb = 0;
if (ap->a_runp)
*ap->a_runp = 0;
} else {
*ap->a_bnp = iomap.iomap_bn + btodb(iomap.iomap_delta);
maxrun = mp->mnt_iosize_max / mp->mnt_stat.f_iosize - 1;
if (ap->a_runb) {
*ap->a_runb = XFS_B_TO_FSB(xmp, iomap.iomap_delta);
if (*ap->a_runb > maxrun)
*ap->a_runb = maxrun;
}
if (ap->a_runp) {
*ap->a_runp =
XFS_B_TO_FSB(xmp, iomap.iomap_bsize
- iomap.iomap_delta - size);
if (*ap->a_runp > maxrun)
*ap->a_runp = maxrun;
}
}
return (0);
}
static int
_xfs_strategy(
struct vop_strategy_args /* {
struct vnode *a_vp;
struct buf *a_bp;
} */ *ap)
{
daddr_t blkno;
struct buf *bp;;
struct bufobj *bo;
struct vnode *vp;
struct xfs_mount *xmp;
int error;
bp = ap->a_bp;
vp = ap->a_vp;
KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)",
__func__, ap->a_vp, ap->a_bp->b_vp));
if (bp->b_blkno == bp->b_lblkno) {
error = VOP_BMAP(vp, bp->b_lblkno, NULL, &blkno, NULL, NULL);
bp->b_blkno = blkno;
bp->b_iooffset = (blkno << BBSHIFT);
if (error) {
bp->b_error = error;
bp->b_ioflags |= BIO_ERROR;
bufdone(bp);
return (0);
}
if ((long)bp->b_blkno == -1)
vfs_bio_clrbuf(bp);
}
if ((long)bp->b_blkno == -1) {
bufdone(bp);
return (0);
}
xmp = XFS_VFSTOM(MNTTOVFS(vp->v_mount));
bo = &xmp->m_ddev_targp->specvp->v_bufobj;
bo->bo_ops->bop_strategy(bo, bp);
return (0);
}
int
_xfs_ioctl(
struct vop_ioctl_args /* {
struct vnode *a_vp;
u_long a_command;
caddr_t a_data;
int fflag;
struct ucred *cred;
struct thread *a_td;
} */ *ap)
{
/* struct vnode *vp = ap->a_vp; */
/* struct thread *p = ap->a_td; */
/* struct file *fp; */
int error;
xfs_vnode_t *xvp = VPTOXFSVP(ap->a_vp);
printf("_xfs_ioctl cmd 0x%lx data %p\n",ap->a_command,ap->a_data);
// XVOP_IOCTL(xvp,(void *)NULL,(void *)NULL,ap->a_fflag,ap->a_command,ap->a_data,error);
error = xfs_ioctl(xvp->v_bh.bh_first,NULL,NULL,ap->a_fflag,ap->a_command,ap->a_data);
return error;
}
int
_xfs_advlock(
struct vop_advlock_args /* {
struct vnode *a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *ap)
{
/* struct vnode *vp = ap->a_vp;*/
struct flock *fl = ap->a_fl;
/* caddr_t id = (caddr_t)1 */ /* ap->a_id */;
/* int flags = ap->a_flags; */
off_t start, end, size;
int error/* , lkop */;
/*KAN: temp */
return (EOPNOTSUPP);
size = 0;
error = 0;
switch (fl->l_whence) {
case SEEK_SET:
case SEEK_CUR:
start = fl->l_start;
break;
case SEEK_END:
start = fl->l_start + size;
default:
return (EINVAL);
}
if (start < 0)
return (EINVAL);
if (fl->l_len == 0)
end = -1;
else {
end = start + fl->l_len - 1;
if (end < start)
return (EINVAL);
}
#ifdef notyet
switch (ap->a_op) {
case F_SETLK:
error = lf_advlock(ap, &vp->v_lockf, size);
break;
case F_UNLCK:
lf_advlock(ap, &vp->v_lockf, size);
break;
case F_GETLK:
error = lf_advlock(ap, &vp->v_lockf, size);
break;
default:
return (EINVAL);
}
#endif
return (error);
}
static int
_xfs_cachedlookup(
struct vop_cachedlookup_args /* {
struct vnode * a_dvp;
struct vnode ** a_vpp;
struct componentname * a_cnp;
} */ *ap)
{
struct vnode *dvp, *tvp;
struct xfs_vnode *cvp;
int islastcn;
int error;
struct vnode **vpp = ap->a_vpp;
struct componentname *cnp = ap->a_cnp;
struct ucred *cred = cnp->cn_cred;
int flags = cnp->cn_flags;
int nameiop = cnp->cn_nameiop;
struct thread *td = cnp->cn_thread;
char *pname = cnp->cn_nameptr;
int namelen = cnp->cn_namelen;
*vpp = NULL;
dvp = ap->a_dvp;
islastcn = flags & ISLASTCN;
XVOP_LOOKUP(VPTOXFSVP(dvp), cnp, &cvp, 0, NULL, cred, error);
if (error == ENOENT) {
if ((nameiop == CREATE || nameiop == RENAME ||
nameiop == DELETE) && islastcn)
{
error = VOP_ACCESS(dvp, VWRITE, cred, td);
if (error)
return (error);
cnp->cn_flags |= SAVENAME;
return (EJUSTRETURN);
}
if ((cnp->cn_flags & MAKEENTRY) && nameiop != CREATE)
cache_enter(dvp, *vpp, cnp);
return (error);
}
if (error)
return (error);
tvp = cvp->v_vnode;
if (nameiop == DELETE && islastcn) {
if ((error = vn_lock(tvp, LK_EXCLUSIVE))) {
vrele(tvp);
goto err_out;
}
*vpp = tvp;
/* Directory should be writable for deletes. */
error = VOP_ACCESS(dvp, VWRITE, cred, td);
if (error)
goto err_out;
/* XXXKAN: Permission checks for sticky dirs? */
return (0);
}
if (nameiop == RENAME && islastcn) {
if ((error = vn_lock(tvp, LK_EXCLUSIVE))) {
vrele(tvp);
goto err_out;
}
*vpp = tvp;
if ((error = VOP_ACCESS(dvp, VWRITE, cred, td)))
goto err_out;
return (0);
}
if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0);
error = vn_lock(tvp, cnp->cn_lkflags);
if (error) {
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
vrele(tvp);
goto err_out;
}
*vpp = tvp;
} else if (namelen == 1 && pname[0] == '.') {
*vpp = tvp;
KASSERT(tvp == dvp, ("not same directory"));
} else {
if ((error = vn_lock(tvp, cnp->cn_lkflags))) {
vrele(tvp);
goto err_out;
}
*vpp = tvp;
}
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, *vpp, cnp);
return (0);
err_out:
if (*vpp != 0)
vput(*vpp);
return (error);
}
static int
_xfs_reclaim(
struct vop_reclaim_args /* {
struct vnode *a_vp;
struct thread *a_td;
} */ *ap)
{
struct vnode *vp = ap->a_vp;
struct xfs_vnode *xfs_vp = VPTOXFSVP(vp);
int error;
XVOP_RECLAIM(xfs_vp, error);
kmem_free(xfs_vp, sizeof(*xfs_vp));
vp->v_data = NULL;
return (error);
}
static int
_xfs_kqfilter(
struct vop_kqfilter_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct knote *a_kn;
} */ *ap)
{
return (0);
}
struct xfs_inode *
xfs_vtoi(struct xfs_vnode *xvp)
{
return(XFS_BHVTOI(xvp->v_fbhv));
}
/*
* Read wrapper for fifos.
*/
static int
_xfsfifo_read(
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap)
{
int error, resid;
struct xfs_inode *ip;
struct uio *uio;
uio = ap->a_uio;
resid = uio->uio_resid;
error = fifo_specops.vop_read(ap);
ip = xfs_vtoi(VPTOXFSVP(ap->a_vp));
if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) == 0 && ip != NULL &&
(uio->uio_resid != resid || (error == 0 && resid != 0)))
xfs_ichgtime(ip, XFS_ICHGTIME_ACC);
return (error);
}
/*
* Write wrapper for fifos.
*/
static int
_xfsfifo_write(
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap)
{
int error, resid;
struct uio *uio;
struct xfs_inode *ip;
uio = ap->a_uio;
resid = uio->uio_resid;
error = fifo_specops.vop_write(ap);
ip = xfs_vtoi(VPTOXFSVP(ap->a_vp));
if (ip != NULL && (uio->uio_resid != resid ||
(error == 0 && resid != 0)))
xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
return (error);
}
/*
* Close wrapper for fifos.
*
* Update the times on the inode then do device close.
*/
static int
_xfsfifo_close(
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
return (fifo_specops.vop_close(ap));
}
/*
* Kqfilter wrapper for fifos.
*
* Fall through to ufs kqfilter routines if needed
*/
static int
_xfsfifo_kqfilter(
struct vop_kqfilter_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct knote *a_kn;
} */ *ap)
{
int error;
error = fifo_specops.vop_kqfilter(ap);
if (error)
error = _xfs_kqfilter(ap);
return (error);
}
static int
_xfs_getextattr(
struct vop_getextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
const char *a_name;
struct uio *a_uio;
size_t *a_size;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
int error;
char *value;
int size;
error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
ap->a_cred, ap->a_td, VREAD);
if (error)
return (error);
size = ATTR_MAX_VALUELEN;
value = (char *)kmem_zalloc(size, KM_SLEEP);
if (value == NULL)
return (ENOMEM);
XVOP_ATTR_GET(VPTOXFSVP(ap->a_vp), ap->a_name, value, &size, 1,
ap->a_cred, error);
if (ap->a_uio != NULL) {
if (ap->a_uio->uio_iov->iov_len < size)
error = ERANGE;
else
uiomove(value, size, ap->a_uio);
}
if (ap->a_size != NULL)
*ap->a_size = size;
kmem_free(value, ATTR_MAX_VALUELEN);
return (error);
}
static int
_xfs_listextattr(
struct vop_listextattr_args /* {
struct vnode *a_vp;
int a_attrnamespace;
struct uio *a_uio;
size_t *a_size;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap)
{
int error;
char *buf = NULL;
int buf_len = 0;
attrlist_cursor_kern_t cursor = { 0 };
int i;
char name_len;
int attrnames_len = 0;
int xfs_flags = ATTR_KERNAMELS;
error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
ap->a_cred, ap->a_td, VREAD);
if (error)
return (error);
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_USER)
xfs_flags |= ATTR_KERNORMALS;
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_SYSTEM)
xfs_flags |= ATTR_KERNROOTLS;
if (ap->a_uio == NULL || ap->a_uio->uio_iov[0].iov_base == NULL) {
xfs_flags |= ATTR_KERNOVAL;
buf_len = 0;
} else {
buf = ap->a_uio->uio_iov[0].iov_base;
buf_len = ap->a_uio->uio_iov[0].iov_len;
}
XVOP_ATTR_LIST(VPTOXFSVP(ap->a_vp), buf, buf_len, xfs_flags,
&cursor, ap->a_cred, error);
if (error < 0) {
attrnames_len = -error;
error = 0;
}
if (buf == NULL)
goto done;
/*
* extattr_list expects a list of names. Each list
* entry consists of one byte for the name length, followed
* by the name (not null terminated)
*/
name_len=0;
for(i=attrnames_len-1; i > 0 ; --i) {
buf[i] = buf[i-1];
if (buf[i])
++name_len;
else {
buf[i] = name_len;
name_len = 0;
}
}
buf[0] = name_len;
if (ap->a_uio != NULL)
ap->a_uio->uio_resid -= attrnames_len;
done:
if (ap->a_size != NULL)
*ap->a_size = attrnames_len;
return (error);
}
static int
_xfs_setextattr(struct vop_setextattr_args *ap)
/*
vop_setextattr {
IN struct vnode *a_vp;
IN int a_attrnamespace;
IN const char *a_name;
INOUT struct uio *a_uio;
IN struct ucred *a_cred;
IN struct thread *a_td;
};
*/
{
char *val;
size_t vallen;
int error, xfs_flags;
if (ap->a_vp->v_type == VCHR)
return (EOPNOTSUPP);
if (ap->a_uio == NULL)
return (EINVAL);
vallen = ap->a_uio->uio_resid;
if (vallen > ATTR_MAX_VALUELEN)
return (EOVERFLOW);
if (ap->a_name[0] == '\0')
return (EINVAL);
error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
ap->a_cred, ap->a_td, VWRITE);
if (error)
return (error);
xfs_flags = 0;
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_USER)
xfs_flags |= ATTR_KERNORMALS;
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_SYSTEM)
xfs_flags |= ATTR_KERNROOTLS;
val = (char *)kmem_zalloc(vallen, KM_SLEEP);
if (val == NULL)
return (ENOMEM);
error = uiomove(val, (int)vallen, ap->a_uio);
if (error)
goto err_out;
XVOP_ATTR_SET(VPTOXFSVP(ap->a_vp), ap->a_name, val, vallen, xfs_flags,
ap->a_cred, error);
err_out:
kmem_free(val, vallen);
return(error);
}
static int
_xfs_deleteextattr(struct vop_deleteextattr_args *ap)
/*
vop_deleteextattr {
IN struct vnode *a_vp;
IN int a_attrnamespace;
IN const char *a_name;
IN struct ucred *a_cred;
IN struct thread *a_td;
};
*/
{
int error, xfs_flags;
if (ap->a_vp->v_type == VCHR)
return (EOPNOTSUPP);
if (ap->a_name[0] == '\0')
return (EINVAL);
error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace,
ap->a_cred, ap->a_td, VWRITE);
if (error)
return (error);
xfs_flags = 0;
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_USER)
xfs_flags |= ATTR_KERNORMALS;
if (ap->a_attrnamespace & EXTATTR_NAMESPACE_SYSTEM)
xfs_flags |= ATTR_KERNROOTLS;
XVOP_ATTR_REMOVE(VPTOXFSVP(ap->a_vp), ap->a_name, xfs_flags,
ap->a_cred, error);
return (error);
}
static int
_xfs_vptofh(struct vop_vptofh_args *ap)
/*
vop_vptofh {
IN struct vnode *a_vp;
IN struct fid *a_fhp;
};
*/
{
printf("xfs_vptofh");
return ENOSYS;
}
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