int
v7fs_update(struct vnode *vp, const struct timespec *acc,
const struct timespec *mod, int flags)
{
struct v7fs_node *v7node = vp->v_data;
struct v7fs_inode *inode = &v7node->inode;
struct v7fs_self *fs = v7node->v7fsmount->core;
bool update = false;
DPRINTF("%p %zu %d\n", vp, vp->v_size, v7fs_inode_filesize(inode));
KDASSERT(vp->v_size == v7fs_inode_filesize(inode));
if (v7node->update_atime) {
inode->atime = acc ? acc->tv_sec : time_second;
v7node->update_atime = false;
update = true;
}
if (v7node->update_ctime) {
inode->ctime = time_second;
v7node->update_ctime = false;
update = true;
}
if (v7node->update_mtime) {
inode->mtime = mod ? mod->tv_sec : time_second;
v7node->update_mtime = false;
update = true;
}
if (update)
v7fs_inode_writeback(fs, inode);
return 0;
}
int
v7fs_symlink(void *v)
{
struct vop_symlink_v3_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *a = v;
struct v7fs_node *parent_node = a->a_dvp->v_data;
struct v7fs_mount *v7fsmount = parent_node->v7fsmount;
struct v7fs_self *fs = v7fsmount->core;
struct vattr *va = a->a_vap;
kauth_cred_t cr = a->a_cnp->cn_cred;
struct componentname *cnp = a->a_cnp;
struct v7fs_fileattr attr;
v7fs_ino_t ino;
const char *from = a->a_target;
const char *to = cnp->cn_nameptr;
size_t len = strlen(from) + 1;
int error = 0;
if (len > V7FS_BSIZE) { /* limited to 512byte pathname */
DPRINTF("too long pathname.");
return ENAMETOOLONG;
}
memset(&attr, 0, sizeof(attr));
attr.uid = kauth_cred_geteuid(cr);
attr.gid = kauth_cred_getegid(cr);
attr.mode = va->va_mode | vtype_to_v7fs_mode(va->va_type);
if ((error = v7fs_file_allocate
(fs, &parent_node->inode, to, &attr, &ino))) {
return error;
}
/* Sync dirent size change. */
uvm_vnp_setsize(a->a_dvp, v7fs_inode_filesize(&parent_node->inode));
/* Get myself vnode. */
if ((error = v7fs_vget(v7fsmount->mountp, ino, a->a_vpp))) {
DPRINTF("can't get vnode.\n");
}
struct v7fs_node *newnode = (*a->a_vpp)->v_data;
struct v7fs_inode *p = &newnode->inode;
v7fs_file_symlink(fs, p, from);
uvm_vnp_setsize(*a->a_vpp, v7fs_inode_filesize(p));
newnode->update_ctime = true;
newnode->update_mtime = true;
newnode->update_atime = true;
if (error == 0)
VOP_UNLOCK(*a->a_vpp);
return error;
}
int
v7fs_rename(void *v)
{
struct vop_rename_args /* {
struct vnode *a_fdvp; from parent-directory
struct vnode *a_fvp; from file
struct componentname *a_fcnp;
struct vnode *a_tdvp; to parent-directory
struct vnode *a_tvp; to file
struct componentname *a_tcnp;
} */ *a = v;
struct vnode *fvp = a->a_fvp;
struct vnode *tvp = a->a_tvp;
struct vnode *fdvp = a->a_fdvp;
struct vnode *tdvp = a->a_tdvp;
struct v7fs_node *parent_from = fdvp->v_data;
struct v7fs_node *parent_to = tdvp->v_data;
struct v7fs_node *v7node = fvp->v_data;
struct v7fs_self *fs = v7node->v7fsmount->core;
const char *from_name = a->a_fcnp->cn_nameptr;
const char *to_name = a->a_tcnp->cn_nameptr;
int error;
DPRINTF("%s->%s %p %p\n", from_name, to_name, fvp, tvp);
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
DPRINTF("cross-device link\n");
goto out;
}
// XXXsource file lock?
error = v7fs_file_rename(fs, &parent_from->inode, from_name,
&parent_to->inode, to_name);
/* 'to file' inode may be changed. (hard-linked and it is cached.)
t_vnops rename_reg_nodir */
if (error == 0 && tvp) {
struct v7fs_inode *inode =
&((struct v7fs_node *)tvp->v_data)->inode;
error = v7fs_inode_load(fs, inode, inode->inode_number);
uvm_vnp_setsize(tvp, v7fs_inode_filesize(inode));
}
/* Sync dirent size change. */
uvm_vnp_setsize(tdvp, v7fs_inode_filesize(&parent_to->inode));
uvm_vnp_setsize(fdvp, v7fs_inode_filesize(&parent_from->inode));
out:
if (tvp)
vput(tvp); /* locked on entry */
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
vrele(fdvp);
vrele(fvp);
return error;
}
int
v7fs_directory_add_entry(struct v7fs_self *fs, struct v7fs_inode *parent_dir,
v7fs_ino_t ino, const char *srcname)
{
struct v7fs_inode inode;
struct v7fs_dirent *dir;
int error = 0;
v7fs_daddr_t blk;
void *buf;
char filename[V7FS_NAME_MAX + 1];
/* Truncate filename. */
v7fs_dirent_filename(filename, srcname);
DPRINTF("%s(%s) %d\n", filename, srcname, ino);
/* Target inode */
if ((error = v7fs_inode_load(fs, &inode, ino)))
return error;
/* Expand datablock. */
if ((error = v7fs_datablock_expand(fs, parent_dir, sizeof(*dir))))
return error;
/* Read last entry. */
if (!(blk = v7fs_datablock_last(fs, parent_dir,
v7fs_inode_filesize(parent_dir))))
return EIO;
/* Load dirent block. This vnode(parent dir) is locked by VFS layer. */
if (!(buf = scratch_read(fs, blk)))
return EIO;
size_t sz = v7fs_inode_filesize(parent_dir);
sz = V7FS_RESIDUE_BSIZE(sz); /* last block payload. */
int n = sz / sizeof(*dir) - 1;
/* Add dirent. */
dir = (struct v7fs_dirent *)buf;
dir[n].inode_number = V7FS_VAL16(fs, ino);
memcpy((char *)dir[n].name, filename, V7FS_NAME_MAX);
/* Write back datablock */
if (!fs->io.write(fs->io.cookie, buf, blk))
error = EIO;
scratch_free(fs, buf);
if (v7fs_inode_isdir(&inode)) {
parent_dir->nlink++;
v7fs_inode_writeback(fs, parent_dir);
}
DPRINTF("done. (dirent size=%dbyte)\n", parent_dir->filesize);
return error;
}
int
v7fs_link(void *v)
{
struct vop_link_v2_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *a = v;
struct vnode *dvp = a->a_dvp;
struct vnode *vp = a->a_vp;
struct v7fs_node *parent_node = dvp->v_data;
struct v7fs_node *node = vp->v_data;
struct v7fs_inode *parent = &parent_node->inode;
struct v7fs_inode *p = &node->inode;
struct v7fs_self *fs = node->v7fsmount->core;
struct componentname *cnp = a->a_cnp;
int error = 0;
DPRINTF("%p\n", vp);
/* Lock soruce file */
if ((error = vn_lock(vp, LK_EXCLUSIVE))) {
DPRINTF("lock failed. %p\n", vp);
VOP_ABORTOP(dvp, cnp);
goto unlock;
}
error = v7fs_file_link(fs, parent, p, cnp->cn_nameptr);
/* Sync dirent size change. */
uvm_vnp_setsize(dvp, v7fs_inode_filesize(&parent_node->inode));
VOP_UNLOCK(vp);
unlock:
return error;
}
int
v7fs_read(void *v)
{
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
kauth_cred_t a_cred;
} */ *a = v;
struct vnode *vp = a->a_vp;
struct uio *uio = a->a_uio;
struct v7fs_node *v7node = vp->v_data;
struct v7fs_inode *inode = &v7node->inode;
vsize_t sz, filesz = v7fs_inode_filesize(inode);
const int advice = IO_ADV_DECODE(a->a_ioflag);
int error = 0;
DPRINTF("type=%d inode=%d\n", vp->v_type, v7node->inode.inode_number);
while (uio->uio_resid > 0) {
if ((sz = MIN(filesz - uio->uio_offset, uio->uio_resid)) == 0)
break;
error = ubc_uiomove(&vp->v_uobj, uio, sz, advice, UBC_READ |
UBC_PARTIALOK | UBC_UNMAP_FLAG(v));
if (error) {
break;
}
DPRINTF("read %zubyte\n", sz);
}
v7node->update_atime = true;
return error;
}
int
v7fs_create(void *v)
{
struct vop_create_v3_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *a = v;
struct v7fs_node *parent_node = a->a_dvp->v_data;
struct v7fs_mount *v7fsmount = parent_node->v7fsmount;
struct v7fs_self *fs = v7fsmount->core;
struct mount *mp = v7fsmount->mountp;
struct v7fs_fileattr attr;
struct vattr *va = a->a_vap;
kauth_cred_t cr = a->a_cnp->cn_cred;
v7fs_ino_t ino;
int error = 0;
DPRINTF("%s parent#%d\n", a->a_cnp->cn_nameptr,
parent_node->inode.inode_number);
KDASSERT((va->va_type == VREG) || (va->va_type == VSOCK));
memset(&attr, 0, sizeof(attr));
attr.uid = kauth_cred_geteuid(cr);
attr.gid = kauth_cred_getegid(cr);
attr.mode = va->va_mode | vtype_to_v7fs_mode (va->va_type);
attr.device = 0;
/* Allocate disk entry. and register its entry to parent directory. */
if ((error = v7fs_file_allocate(fs, &parent_node->inode,
a->a_cnp->cn_nameptr, &attr, &ino))) {
DPRINTF("v7fs_file_allocate failed.\n");
return error;
}
/* Sync dirent size change. */
uvm_vnp_setsize(a->a_dvp, v7fs_inode_filesize(&parent_node->inode));
/* Get myself vnode. */
*a->a_vpp = 0;
if ((error = v7fs_vget(mp, ino, a->a_vpp))) {
DPRINTF("v7fs_vget failed.\n");
return error;
}
/* Scheduling update time. real update by v7fs_update */
struct v7fs_node *newnode = (*a->a_vpp)->v_data;
newnode->update_ctime = true;
newnode->update_mtime = true;
newnode->update_atime = true;
DPRINTF("allocated %s->#%d\n", a->a_cnp->cn_nameptr, ino);
if (error == 0)
VOP_UNLOCK(*a->a_vpp);
return error;
}
int
v7fs_mknod(void *v)
{
struct vop_mknod_v3_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *a = v;
struct componentname *cnp = a->a_cnp;
kauth_cred_t cr = cnp->cn_cred;
struct vnode *dvp = a->a_dvp;
struct vattr *va = a->a_vap;
struct v7fs_node *parent_node = dvp->v_data;
struct v7fs_mount *v7fsmount = parent_node->v7fsmount;
struct v7fs_self *fs = v7fsmount->core;
struct mount *mp = v7fsmount->mountp;
struct v7fs_fileattr attr;
v7fs_ino_t ino;
int error = 0;
DPRINTF("%s %06o %lx %d\n", cnp->cn_nameptr, va->va_mode,
(long)va->va_rdev, va->va_type);
memset(&attr, 0, sizeof(attr));
attr.uid = kauth_cred_geteuid(cr);
attr.gid = kauth_cred_getegid(cr);
attr.mode = va->va_mode | vtype_to_v7fs_mode(va->va_type);
attr.device = va->va_rdev;
if ((error = v7fs_file_allocate(fs, &parent_node->inode,
cnp->cn_nameptr, &attr, &ino)))
return error;
/* Sync dirent size change. */
uvm_vnp_setsize(dvp, v7fs_inode_filesize(&parent_node->inode));
if ((error = v7fs_vget(mp, ino, a->a_vpp))) {
DPRINTF("can't get vnode.\n");
return error;
}
struct v7fs_node *newnode = (*a->a_vpp)->v_data;
newnode->update_ctime = true;
newnode->update_mtime = true;
newnode->update_atime = true;
if (error == 0)
VOP_UNLOCK(*a->a_vpp);
return error;
}
int
v7fs_rmdir(void *v)
{
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *a = v;
struct vnode *vp = a->a_vp;
struct vnode *dvp = a->a_dvp;
struct v7fs_node *parent_node = dvp->v_data;
struct v7fs_mount *v7fsmount = parent_node->v7fsmount;
struct v7fs_inode *inode = &((struct v7fs_node *)vp->v_data)->inode;
struct v7fs_self *fs = v7fsmount->core;
int error = 0;
DPRINTF("delete %s\n", a->a_cnp->cn_nameptr);
KDASSERT(vp->v_type == VDIR);
if ((error = v7fs_file_deallocate(fs, &parent_node->inode,
a->a_cnp->cn_nameptr))) {
DPRINTF("v7fs_directory_deallocate failed.\n");
goto out;
}
error = v7fs_inode_load(fs, inode, inode->inode_number);
if (error)
goto out;
uvm_vnp_setsize(vp, v7fs_inode_filesize(inode));
/* Sync dirent size change. */
uvm_vnp_setsize(dvp, v7fs_inode_filesize(&parent_node->inode));
out:
vput(vp);
vput(dvp);
return error;
}
int
v7fs_write(void *v)
{
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
kauth_cred_t a_cred;
} */ *a = v;
struct vnode *vp = a->a_vp;
struct uio *uio = a->a_uio;
int advice = IO_ADV_DECODE(a->a_ioflag);
struct v7fs_node *v7node = vp->v_data;
struct v7fs_inode *inode = &v7node->inode;
struct v7fs_self *fs = v7node->v7fsmount->core;
vsize_t sz;
int error = 0;
if (uio->uio_resid == 0)
return 0;
sz = v7fs_inode_filesize(inode);
DPRINTF("(i)%ld (v)%zu ofs=%zu + res=%zu = %zu\n", sz, vp->v_size,
uio->uio_offset, uio->uio_resid, uio->uio_offset + uio->uio_resid);
/* Append mode file offset is managed by kernel. */
if (a->a_ioflag & IO_APPEND)
uio->uio_offset = sz;
/* If write region is over filesize, expand. */
size_t newsize= uio->uio_offset + uio->uio_resid;
ssize_t expand = newsize - sz;
if (expand > 0) {
if ((error = v7fs_datablock_expand(fs, inode, expand)))
return error;
uvm_vnp_setsize(vp, newsize);
}
while (uio->uio_resid > 0) {
sz = uio->uio_resid;
if ((error = ubc_uiomove(&vp->v_uobj, uio, sz, advice,
UBC_WRITE | UBC_UNMAP_FLAG(v))))
break;
DPRINTF("write %zubyte\n", sz);
}
v7node->update_mtime = true;
return error;
}
int
v7fs_directory_remove_entry(struct v7fs_self *fs, struct v7fs_inode *parent_dir,
const char *name)
{
struct v7fs_inode inode;
int error;
struct v7fs_dirent lastdirent;
v7fs_daddr_t lastblk;
size_t sz, lastsz;
v7fs_off_t pos;
void *buf;
/* Setup replaced entry. */
sz = parent_dir->filesize;
lastblk = v7fs_datablock_last(fs, parent_dir,
v7fs_inode_filesize(parent_dir));
lastsz = V7FS_RESIDUE_BSIZE(sz);
pos = lastsz - sizeof(lastdirent);
if (!(buf = scratch_read(fs, lastblk)))
return EIO;
lastdirent = *((struct v7fs_dirent *)((uint8_t *)buf + pos));
scratch_free(fs, buf);
DPRINTF("last dirent=%d %s pos=%d\n",
V7FS_VAL16(fs, lastdirent.inode_number), lastdirent.name, pos);
struct v7fs_lookup_arg lookup_arg =
{ .name = name, .replace = &lastdirent/*disk endian */ };
/* Search entry that removed. replace it to last dirent. */
if ((error = v7fs_datablock_foreach(fs, parent_dir, remove_subr,
&lookup_arg)) != V7FS_ITERATOR_BREAK)
return ENOENT;
/* Contract dirent entries. */
v7fs_datablock_contract(fs, parent_dir, sizeof(lastdirent));
DPRINTF("done. (dirent size=%dbyte)\n", parent_dir->filesize);
/* Target inode */
if ((error = v7fs_inode_load(fs, &inode, lookup_arg.inode_number)))
return error;
if (v7fs_inode_isdir(&inode)) {
parent_dir->nlink--;
v7fs_inode_writeback(fs, parent_dir);
}
return 0;
}
int
v7fs_advlock(void *v)
{
struct vop_advlock_args /* {
struct vnode *a_vp;
void *a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *a = v;
struct v7fs_node *v7node = a->a_vp->v_data;
DPRINTF("op=%d\n", a->a_op);
return lf_advlock(a, &v7node->lockf,
v7fs_inode_filesize(&v7node->inode));
}
int
v7fs_remove(void *v)
{
struct vop_remove_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_dvp;
struct vnode * a_vp;
struct componentname * a_cnp;
} */ *a = v;
struct v7fs_node *parent_node = a->a_dvp->v_data;
struct v7fs_mount *v7fsmount = parent_node->v7fsmount;
struct vnode *vp = a->a_vp;
struct vnode *dvp = a->a_dvp;
struct v7fs_inode *inode = &((struct v7fs_node *)vp->v_data)->inode;
struct v7fs_self *fs = v7fsmount->core;
int error = 0;
DPRINTF("delete %s\n", a->a_cnp->cn_nameptr);
if (vp->v_type == VDIR) {
error = EPERM;
goto out;
}
if ((error = v7fs_file_deallocate(fs, &parent_node->inode,
a->a_cnp->cn_nameptr))) {
DPRINTF("v7fs_file_delete failed.\n");
goto out;
}
error = v7fs_inode_load(fs, inode, inode->inode_number);
if (error)
goto out;
/* Sync dirent size change. */
uvm_vnp_setsize(dvp, v7fs_inode_filesize(&parent_node->inode));
out:
if (dvp == vp)
vrele(vp); /* v_usecount-- of unlocked vp */
else
vput(vp); /* unlock vp and then v_usecount-- */
vput(dvp);
return error;
}
int
v7fs_close(void *v)
{
struct vop_close_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
kauth_cred_t a_cred;
} */ *a = v;
struct vnode *vp = a->a_vp;
#ifdef V7FS_VNOPS_DEBUG
struct v7fs_node *v7node = vp->v_data;
struct v7fs_inode *inode = &v7node->inode;
#endif
DPRINTF("#%d (i)%dbyte (v)%zubyte\n", inode->inode_number,
v7fs_inode_filesize(inode), vp->v_size);
/* Update timestamp */
v7fs_update(vp, 0, 0, UPDATE_WAIT);
return 0;
}
int
v7fs_file_lookup_by_name(struct v7fs_self *fs, struct v7fs_inode *parent_dir,
const char *name, v7fs_ino_t *ino)
{
char filename[V7FS_NAME_MAX + 1];
char *q;
int error;
size_t len;
if ((q = strchr(name, '/'))) {
/* Zap following path. */
len = MIN(V7FS_NAME_MAX, q - name);
memcpy(filename, name, len);
filename[len] = '\0'; /* '/' -> '\0' */
} else {
v7fs_dirent_filename(filename, name);
}
DPRINTF("%s(%s) dir=%d\n", filename, name, parent_dir->inode_number);
struct v7fs_lookup_arg lookup_arg = { .name = filename,
.inode_number = 0 };
if ((error = v7fs_datablock_foreach(fs, parent_dir, lookup_subr,
&lookup_arg)) != V7FS_ITERATOR_BREAK) {
DPRINTF("not found.\n");
return ENOENT;
}
*ino = lookup_arg.inode_number;
DPRINTF("done. ino=%d\n", *ino);
return 0;
}
static int
lookup_subr(struct v7fs_self *fs, void *ctx, v7fs_daddr_t blk, size_t sz)
{
struct v7fs_lookup_arg *p = (struct v7fs_lookup_arg *)ctx;
struct v7fs_dirent *dir;
const char *name = p->name;
void *buf;
size_t i, n;
int ret = 0;
if (!(buf = scratch_read(fs, blk)))
return EIO;
dir = (struct v7fs_dirent *)buf;
n = sz / sizeof(*dir);
v7fs_dirent_endian_convert(fs, dir, n);
for (i = 0; i < n; i++, dir++) {
if (dir->inode_number < 1) {
DPRINTF("*** bad inode #%d ***\n", dir->inode_number);
continue;
}
if (strncmp((const char *)dir->name, name, V7FS_NAME_MAX) == 0)
{
p->inode_number = dir->inode_number;
ret = V7FS_ITERATOR_BREAK; /* found */
break;
}
}
scratch_free(fs, buf);
return ret;
}
int
v7fs_file_allocate(struct v7fs_self *fs, struct v7fs_inode *parent_dir,
const char *srcname, struct v7fs_fileattr *attr, v7fs_ino_t *ino)
{
struct v7fs_inode inode;
char filename[V7FS_NAME_MAX + 1];
struct v7fs_dirent *dir;
int error;
/* Truncate filename. */
v7fs_dirent_filename(filename, srcname);
DPRINTF("%s(%s)\n", filename, srcname);
/* Check filename. */
if (v7fs_file_lookup_by_name(fs, parent_dir, filename, ino) == 0) {
DPRINTF("%s exists\n", filename);
return EEXIST;
}
/* Get new inode. */
if ((error = v7fs_inode_allocate(fs, ino)))
return error;
/* Set initial attribute. */
memset(&inode, 0, sizeof(inode));
inode.inode_number = *ino;
inode.mode = attr->mode;
inode.uid = attr->uid;
inode.gid = attr->gid;
if (attr->ctime)
inode.ctime = attr->ctime;
if (attr->mtime)
inode.mtime = attr->mtime;
if (attr->atime)
inode.atime = attr->atime;
switch (inode.mode & V7FS_IFMT) {
default:
DPRINTF("Can't allocate %o type.\n", inode.mode);
v7fs_inode_deallocate(fs, *ino);
return EINVAL;
case V7FS_IFCHR:
/* FALLTHROUGH */
case V7FS_IFBLK:
inode.nlink = 1;
inode.device = attr->device;
inode.addr[0] = inode.device;
break;
case V7FSBSD_IFFIFO:
/* FALLTHROUGH */
case V7FSBSD_IFSOCK:
/* FALLTHROUGH */
case V7FSBSD_IFLNK:
/* FALLTHROUGH */
case V7FS_IFREG:
inode.nlink = 1;
break;
case V7FS_IFDIR:
inode.nlink = 2; /* . + .. */
if ((error = v7fs_datablock_expand(fs, &inode, sizeof(*dir) * 2
))) {
v7fs_inode_deallocate(fs, *ino);
return error;
}
v7fs_daddr_t blk = inode.addr[0];
void *buf;
if (!(buf = scratch_read(fs, blk))) {
v7fs_inode_deallocate(fs, *ino);
return EIO;
}
dir = (struct v7fs_dirent *)buf;
strcpy(dir[0].name, ".");
dir[0].inode_number = V7FS_VAL16(fs, *ino);
strcpy(dir[1].name, "..");
dir[1].inode_number = V7FS_VAL16(fs, parent_dir->inode_number);
if (!fs->io.write(fs->io.cookie, buf, blk)) {
scratch_free(fs, buf);
return EIO;
}
scratch_free(fs, buf);
break;
}
v7fs_inode_writeback(fs, &inode);
/* Link this inode to parent directory. */
if ((error = v7fs_directory_add_entry(fs, parent_dir, *ino, filename)))
{
DPRINTF("can't add dirent.\n");
return error;
}
return 0;
}
int
v7fs_file_deallocate(struct v7fs_self *fs, struct v7fs_inode *parent_dir,
const char *name)
{
v7fs_ino_t ino;
struct v7fs_inode inode;
int error;
DPRINTF("%s\n", name);
if ((error = v7fs_file_lookup_by_name(fs, parent_dir, name, &ino))) {
DPRINTF("no such a file: %s\n", name);
return error;
}
DPRINTF("%s->#%d\n", name, ino);
if ((error = v7fs_inode_load(fs, &inode, ino)))
return error;
if (v7fs_inode_isdir(&inode)) {
char filename[V7FS_NAME_MAX + 1];
v7fs_dirent_filename(filename, name);
/* Check parent */
if (strncmp(filename, "..", V7FS_NAME_MAX) == 0) {
DPRINTF("can not remove '..'\n");
return EINVAL; /* t_vnops rename_dotdot */
}
/* Check empty */
if (v7fs_inode_filesize(&inode) !=
sizeof(struct v7fs_dirent) * 2 /*"." + ".."*/) {
DPRINTF("directory not empty.\n");
return ENOTEMPTY;/* t_vnops dir_noempty, rename_dir(6)*/
}
error = v7fs_datablock_size_change(fs, 0, &inode);
if (error)
return error;
inode.nlink = 0; /* remove this. */
} else {
/* Decrement reference count. */
--inode.nlink; /* regular file. */
DPRINTF("%s nlink=%d\n", name, inode.nlink);
}
if ((error = v7fs_directory_remove_entry(fs, parent_dir, name)))
return error;
DPRINTF("remove dirent\n");
v7fs_inode_writeback(fs, &inode);
return 0;
}
int
v7fs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct v7fs_mount *v7fsmount = mp->mnt_data;
struct v7fs_self *fs = v7fsmount->core;
struct vnode *vp;
struct v7fs_node *v7fs_node;
struct v7fs_inode inode;
int error;
/* Lookup requested i-node */
if ((error = v7fs_inode_load(fs, &inode, ino))) {
DPRINTF("v7fs_inode_load failed.\n");
return error;
}
retry:
mutex_enter(&mntvnode_lock);
for (v7fs_node = LIST_FIRST(&v7fsmount->v7fs_node_head);
v7fs_node != NULL; v7fs_node = LIST_NEXT(v7fs_node, link)) {
if (v7fs_node->inode.inode_number == ino) {
vp = v7fs_node->vnode;
mutex_enter(vp->v_interlock);
mutex_exit(&mntvnode_lock);
if (vget(vp, LK_EXCLUSIVE) == 0) {
*vpp = vp;
return 0;
} else {
DPRINTF("retry!\n");
goto retry;
}
}
}
mutex_exit(&mntvnode_lock);
/* Allocate v-node. */
if ((error = getnewvnode(VT_V7FS, mp, v7fs_vnodeop_p, NULL, &vp))) {
DPRINTF("getnewvnode error.\n");
return error;
}
/* Lock vnode here */
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
/* Allocate i-node */
vp->v_data = pool_get(&v7fs_node_pool, PR_WAITOK);
memset(vp->v_data, 0, sizeof(*v7fs_node));
v7fs_node = vp->v_data;
mutex_enter(&mntvnode_lock);
LIST_INSERT_HEAD(&v7fsmount->v7fs_node_head, v7fs_node, link);
mutex_exit(&mntvnode_lock);
v7fs_node->vnode = vp;
v7fs_node->v7fsmount = v7fsmount;
v7fs_node->inode = inode;/*structure copy */
v7fs_node->lockf = NULL; /* advlock */
genfs_node_init(vp, &v7fs_genfsops);
uvm_vnp_setsize(vp, v7fs_inode_filesize(&inode));
if (ino == V7FS_ROOT_INODE) {
vp->v_type = VDIR;
vp->v_vflag |= VV_ROOT;
} else {
vp->v_type = v7fs_mode_to_vtype(inode.mode);
if (vp->v_type == VBLK || vp->v_type == VCHR) {
dev_t rdev = inode.device;
vp->v_op = v7fs_specop_p;
spec_node_init(vp, rdev);
} else if (vp->v_type == VFIFO) {
vp->v_op = v7fs_fifoop_p;
}
}
*vpp = vp;
return 0;
}
