/* get lvp's parent, if possible, even if it isn't set.
lvp is expected to have an iocount before and after this call.
if a dvpp is populated the returned vnode has an iocount. */
static int
null_get_lowerparent(vnode_t lvp, vnode_t * dvpp, vfs_context_t ctx)
{
int error = 0;
struct vnode_attr va;
mount_t mp = vnode_mount(lvp);
vnode_t dvp = vnode_parent(lvp);
if (dvp) {
error = vnode_get(dvp);
goto end;
}
error = ENOENT;
if (!(mp->mnt_kern_flag & MNTK_PATH_FROM_ID)) {
goto end;
}
VATTR_INIT(&va);
VATTR_WANTED(&va, va_parentid);
error = vnode_getattr(lvp, &va, ctx);
if (error || !VATTR_IS_SUPPORTED(&va, va_parentid)) {
goto end;
}
error = VFS_VGET(mp, (ino64_t)va.va_parentid, &dvp, ctx);
end:
if (error == 0) {
*dvpp = dvp;
}
return error;
}
ino_t
VnodeToIno(vnode_t avp)
{
unsigned long ret;
#ifndef AFS_DARWIN80_ENV
if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
struct inode *ip = VTOI(avp);
ret = ip->i_number;
} else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
#endif
#if defined(AFS_DARWIN80_ENV)
struct vattr va;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_fileid);
if (vnode_getattr(avp, &va, afs_osi_ctxtp))
osi_Panic("VOP_GETATTR failed in VnodeToIno\n");
if (!VATTR_ALL_SUPPORTED(&va))
osi_Panic("VOP_GETATTR unsupported fileid in VnodeToIno\n");
ret = va.va_fileid;
#elif !defined(VTOH)
struct vattr va;
if (VOP_GETATTR(avp, &va, &afs_osi_cred, current_proc()))
osi_Panic("VOP_GETATTR failed in VnodeToIno\n");
ret = va.va_fileid;
#else
struct hfsnode *hp = VTOH(avp);
ret = H_FILEID(hp);
#endif
#ifndef AFS_DARWIN80_ENV
} else
osi_Panic("VnodeToIno called before cacheops initialized\n");
#endif
return ret;
}
int
afs_osi_Stat(struct osi_file *afile, struct osi_stat *astat)
{
afs_int32 code;
struct vattr tvattr;
AFS_STATCNT(osi_Stat);
ObtainWriteLock(&afs_xosi, 320);
AFS_GUNLOCK();
#ifdef AFS_DARWIN80_ENV
VATTR_INIT(&tvattr);
VATTR_WANTED(&tvattr, va_size);
VATTR_WANTED(&tvattr, va_blocksize);
VATTR_WANTED(&tvattr, va_mtime);
VATTR_WANTED(&tvattr, va_atime);
code = vnode_getattr(afile->vnode, &tvattr, afs_osi_ctxtp);
if (code == 0 && !VATTR_ALL_SUPPORTED(&tvattr))
code = EINVAL;
#else
code = VOP_GETATTR(afile->vnode, &tvattr, &afs_osi_cred, current_proc());
#endif
AFS_GLOCK();
if (code == 0) {
astat->size = tvattr.va_size;
astat->mtime = tvattr.va_mtime.tv_sec;
astat->atime = tvattr.va_atime.tv_sec;
}
ReleaseWriteLock(&afs_xosi);
return code;
}
int
osi_UFSTruncate(struct osi_file *afile, afs_int32 asize)
{
afs_ucred_t *oldCred;
struct vattr tvattr;
afs_int32 code;
struct osi_stat tstat;
AFS_STATCNT(osi_Truncate);
/* This routine only shrinks files, and most systems
* have very slow truncates, even when the file is already
* small enough. Check now and save some time.
*/
code = afs_osi_Stat(afile, &tstat);
if (code || tstat.size <= asize)
return code;
ObtainWriteLock(&afs_xosi, 321);
AFS_GUNLOCK();
#ifdef AFS_DARWIN80_ENV
VATTR_INIT(&tvattr);
VATTR_SET(&tvattr, va_size, asize);
code = vnode_setattr(afile->vnode, &tvattr, afs_osi_ctxtp);
#else
VATTR_NULL(&tvattr);
tvattr.va_size = asize;
code = VOP_SETATTR(afile->vnode, &tvattr, &afs_osi_cred, current_proc());
#endif
AFS_GLOCK();
ReleaseWriteLock(&afs_xosi);
return code;
}
dev_t
VnodeToDev(vnode_t avp)
{
#ifndef AFS_DARWIN80_ENV
if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
struct inode *ip = VTOI(avp);
return ip->i_dev;
} else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
#endif
#if defined(AFS_DARWIN80_ENV)
struct vattr va;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_fsid);
if (vnode_getattr(avp, &va, afs_osi_ctxtp))
osi_Panic("VOP_GETATTR failed in VnodeToDev\n");
if (!VATTR_ALL_SUPPORTED(&va))
osi_Panic("VOP_GETATTR unsupported fsid in VnodeToIno\n");
return va.va_fsid; /* XXX they say it's the dev.... */
#elif !defined(VTOH)
struct vattr va;
if (VOP_GETATTR(avp, &va, &afs_osi_cred, current_proc()))
osi_Panic("VOP_GETATTR failed in VnodeToDev\n");
return va.va_fsid; /* XXX they say it's the dev.... */
#else
struct hfsnode *hp = VTOH(avp);
return H_DEV(hp);
#endif
#ifndef AFS_DARWIN80_ENV
} else
osi_Panic("VnodeToDev called before cacheops initialized\n");
#endif
}
/* vnode_size() is not exported */
static errno_t
vnode_size(vnode_t vp, off_t *sizep, vfs_context_t ctx)
{
struct vnode_attr va;
int error;
VATTR_INIT(&va);
VATTR_WANTED(&va, va_data_size);
error = vnode_getattr(vp, &va, ctx);
if (!error)
*sizep = va.va_data_size;
return(error);
}
bool VNodeDiskDeviceClass::setupVNode() {
int vapError = -1;
struct vnode_attr vap;
if (m_vnode != NULL)
return true;
vfs_context_t vfsContext = vfs_context_create((vfs_context_t) 0);
int vnodeError = vnode_open(m_filePath->getCStringNoCopy(), (FREAD | FWRITE), 0, 0,
&m_vnode, vfsContext);
if (vnodeError || m_vnode == NULL) {
IOLog("Error when opening file %s: error %d\n",
m_filePath->getCStringNoCopy(), vnodeError);
goto failure;
}
if (!vnode_isreg(m_vnode)) {
IOLog("Error when opening file %s: not a regular file\n",
m_filePath->getCStringNoCopy());
vnode_close(m_vnode, (FREAD | FWRITE), vfsContext);
goto failure;
}
VATTR_INIT(&vap);
VATTR_WANTED(&vap, va_data_size);
vapError = vnode_getattr(m_vnode, &vap, vfsContext);
if (vapError) {
IOLog("Error when retrieving vnode's attributes with error code %d\n", vapError);
goto failure;
}
if (vap.va_data_size < m_blockSize * m_blockNum) {
IOLog("Error file %s is too small, actual size is %llu\n",
m_filePath->getCStringNoCopy(), vap.va_data_size);
goto failure;
}
vfs_context_rele(vfsContext);
return true;
failure:
vfs_context_rele(vfsContext);
return false;
}
osi_DisableAtimes(struct vnode *avp)
#endif
{
#ifdef AFS_DARWIN80_ENV
struct vnode_attr vap;
VATTR_INIT(&vap);
VATTR_CLEAR_SUPPORTED(&vap, va_access_time);
vnode_setattr(avp, &vap, afs_osi_ctxtp);
#else
if (afs_CacheFSType == AFS_APPL_UFS_CACHE) {
struct inode *ip = VTOI(avp);
ip->i_flag &= ~IN_ACCESS;
}
#ifdef VTOH /* can't do this without internals */
else if (afs_CacheFSType == AFS_APPL_HFS_CACHE) {
struct hfsnode *hp = VTOH(avp);
hp->h_nodeflags &= ~IN_ACCESS;
}
#endif
#endif
}
struct kern_direct_file_io_ref_t *
kern_open_file_for_direct_io(const char * name,
uint32_t iflags,
kern_get_file_extents_callback_t callback,
void * callback_ref,
off_t set_file_size,
off_t fs_free_size,
off_t write_file_offset,
void * write_file_addr,
size_t write_file_len,
dev_t * partition_device_result,
dev_t * image_device_result,
uint64_t * partitionbase_result,
uint64_t * maxiocount_result,
uint32_t * oflags)
{
struct kern_direct_file_io_ref_t * ref;
proc_t p;
struct vnode_attr va;
dk_apfs_wbc_range_t wbc_range;
int error;
off_t f_offset;
uint64_t fileblk;
size_t filechunk;
uint64_t physoffset, minoffset;
dev_t device;
dev_t target = 0;
int isssd = 0;
uint32_t flags = 0;
uint32_t blksize;
off_t maxiocount, count, segcount, wbctotal;
boolean_t locked = FALSE;
int fmode, cmode;
struct nameidata nd;
u_int32_t ndflags;
off_t mpFree;
int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
void * p1 = NULL;
void * p2 = NULL;
error = EFAULT;
ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
if (!ref)
{
error = EFAULT;
goto out;
}
bzero(ref, sizeof(*ref));
p = kernproc;
ref->ctx = vfs_context_kernel();
fmode = (kIOPolledFileCreate & iflags) ? (O_CREAT | FWRITE) : FWRITE;
cmode = S_IRUSR | S_IWUSR;
ndflags = NOFOLLOW;
NDINIT(&nd, LOOKUP, OP_OPEN, ndflags, UIO_SYSSPACE, CAST_USER_ADDR_T(name), ref->ctx);
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, cmode);
VATTR_SET(&va, va_dataprotect_flags, VA_DP_RAWENCRYPTED);
VATTR_SET(&va, va_dataprotect_class, PROTECTION_CLASS_D);
if ((error = vn_open_auth(&nd, &fmode, &va))) {
kprintf("vn_open_auth(fmode: %d, cmode: %d) failed with error: %d\n", fmode, cmode, error);
goto out;
}
ref->vp = nd.ni_vp;
if (ref->vp->v_type == VREG)
{
vnode_lock_spin(ref->vp);
SET(ref->vp->v_flag, VSWAP);
vnode_unlock(ref->vp);
}
if (write_file_addr && write_file_len)
{
if ((error = kern_write_file(ref, write_file_offset, write_file_addr, write_file_len, IO_SKIP_ENCRYPTION))) {
kprintf("kern_write_file() failed with error: %d\n", error);
goto out;
}
}
VATTR_INIT(&va);
VATTR_WANTED(&va, va_rdev);
VATTR_WANTED(&va, va_fsid);
VATTR_WANTED(&va, va_devid);
VATTR_WANTED(&va, va_data_size);
VATTR_WANTED(&va, va_data_alloc);
VATTR_WANTED(&va, va_nlink);
error = EFAULT;
if (vnode_getattr(ref->vp, &va, ref->ctx)) goto out;
wbctotal = 0;
mpFree = freespace_mb(ref->vp);
mpFree <<= 20;
kprintf("kern_direct_file(%s): vp size %qd, alloc %qd, mp free %qd, keep free %qd\n",
name, va.va_data_size, va.va_data_alloc, mpFree, fs_free_size);
if (ref->vp->v_type == VREG)
{
/* Don't dump files with links. */
if (va.va_nlink != 1) goto out;
device = (VATTR_IS_SUPPORTED(&va, va_devid)) ? va.va_devid : va.va_fsid;
ref->filelength = va.va_data_size;
p1 = &device;
p2 = p;
do_ioctl = &file_ioctl;
if (kIOPolledFileHibernate & iflags)
{
error = do_ioctl(p1, p2, DKIOCAPFSGETWBCRANGE, (caddr_t) &wbc_range);
ref->wbcranged = (error == 0);
}
if (ref->wbcranged)
{
uint32_t idx;
assert(wbc_range.count <= (sizeof(wbc_range.extents) / sizeof(wbc_range.extents[0])));
for (idx = 0; idx < wbc_range.count; idx++) wbctotal += wbc_range.extents[idx].length;
kprintf("kern_direct_file(%s): wbc %qd\n", name, wbctotal);
if (wbctotal) target = wbc_range.dev;
}
if (set_file_size)
{
if (wbctotal)
{
if (wbctotal >= set_file_size) set_file_size = HIBERNATE_MIN_FILE_SIZE;
else
{
set_file_size -= wbctotal;
if (set_file_size < HIBERNATE_MIN_FILE_SIZE) set_file_size = HIBERNATE_MIN_FILE_SIZE;
}
}
if (fs_free_size)
{
mpFree += va.va_data_alloc;
if ((mpFree < set_file_size) || ((mpFree - set_file_size) < fs_free_size))
{
error = ENOSPC;
goto out;
}
}
error = vnode_setsize(ref->vp, set_file_size, IO_NOZEROFILL | IO_NOAUTH, ref->ctx);
if (error) goto out;
ref->filelength = set_file_size;
}
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
/* Partition. */
device = va.va_rdev;
p1 = ref->vp;
p2 = ref->ctx;
do_ioctl = &device_ioctl;
}
else
{
/* Don't dump to non-regular files. */
error = EFAULT;
goto out;
}
ref->device = device;
// probe for CF
dk_corestorage_info_t cs_info;
memset(&cs_info, 0, sizeof(dk_corestorage_info_t));
error = do_ioctl(p1, p2, DKIOCCORESTORAGE, (caddr_t)&cs_info);
ref->cf = (error == 0) && (cs_info.flags & DK_CORESTORAGE_ENABLE_HOTFILES);
// get block size
error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
if (error)
goto out;
minoffset = HIBERNATE_MIN_PHYSICAL_LBA * ref->blksize;
if (ref->vp->v_type != VREG)
{
error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
if (error) goto out;
ref->filelength = fileblk * ref->blksize;
}
// pin logical extents, CS version
error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
if (error && (ENOTTY != error)) goto out;
ref->pinned = (error == 0);
// pin logical extents, apfs version
error = VNOP_IOCTL(ref->vp, FSCTL_FREEZE_EXTENTS, NULL, 0, ref->ctx);
if (error && (ENOTTY != error)) goto out;
ref->frozen = (error == 0);
// generate the block list
error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
if (error) goto out;
locked = TRUE;
f_offset = 0;
for (; f_offset < ref->filelength; f_offset += filechunk)
{
if (ref->vp->v_type == VREG)
{
filechunk = 1*1024*1024*1024;
daddr64_t blkno;
error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno,
&filechunk, NULL, VNODE_WRITE | VNODE_BLOCKMAP_NO_TRACK, NULL);
if (error) goto out;
if (-1LL == blkno) continue;
fileblk = blkno * ref->blksize;
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
fileblk = f_offset;
filechunk = f_offset ? 0 : ref->filelength;
}
physoffset = 0;
while (physoffset < filechunk)
{
dk_physical_extent_t getphysreq;
bzero(&getphysreq, sizeof(getphysreq));
getphysreq.offset = fileblk + physoffset;
getphysreq.length = (filechunk - physoffset);
error = do_ioctl(p1, p2, DKIOCGETPHYSICALEXTENT, (caddr_t) &getphysreq);
if (error) goto out;
if (!target)
{
target = getphysreq.dev;
}
else if (target != getphysreq.dev)
{
error = ENOTSUP;
goto out;
}
assert(getphysreq.offset >= minoffset);
#if HIBFRAGMENT
uint64_t rev;
for (rev = 4096; rev <= getphysreq.length; rev += 4096)
{
callback(callback_ref, getphysreq.offset + getphysreq.length - rev, 4096);
}
#else
callback(callback_ref, getphysreq.offset, getphysreq.length);
#endif
physoffset += getphysreq.length;
}
}
if (ref->wbcranged)
{
uint32_t idx;
for (idx = 0; idx < wbc_range.count; idx++)
{
assert(wbc_range.extents[idx].offset >= minoffset);
callback(callback_ref, wbc_range.extents[idx].offset, wbc_range.extents[idx].length);
}
}
callback(callback_ref, 0ULL, 0ULL);
if (ref->vp->v_type == VREG) p1 = ⌖
else
{
p1 = ⌖
p2 = p;
do_ioctl = &file_ioctl;
}
// get partition base
if (partitionbase_result)
{
error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
if (error)
goto out;
}
// get block size & constraints
error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
if (error)
goto out;
maxiocount = 1*1024*1024*1024;
error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count);
if (error)
count = 0;
count *= blksize;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count);
if (error)
count = 0;
count *= blksize;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
if (!error)
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTREAD, (caddr_t) &segcount);
if (error)
count = segcount = 0;
count *= segcount;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
if (!error)
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTCOUNTWRITE, (caddr_t) &segcount);
if (error)
count = segcount = 0;
count *= segcount;
if (count && (count < maxiocount))
maxiocount = count;
kprintf("max io 0x%qx bytes\n", maxiocount);
if (maxiocount_result)
*maxiocount_result = maxiocount;
error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd);
if (!error && isssd)
flags |= kIOPolledFileSSD;
if (partition_device_result)
*partition_device_result = device;
if (image_device_result)
*image_device_result = target;
if (oflags)
*oflags = flags;
if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
vnode_close(ref->vp, FWRITE, ref->ctx);
ref->vp = NULLVP;
ref->ctx = NULL;
}
out:
printf("kern_open_file_for_direct_io(%p, %d)\n", ref, error);
if (error && locked)
{
p1 = &device;
(void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
}
if (error && ref)
{
if (ref->vp)
{
(void) kern_ioctl_file_extents(ref, _DKIOCCSUNPINEXTENT, 0, (ref->pinned && ref->cf) ? ref->filelength : 0);
if (ref->frozen)
{
(void) VNOP_IOCTL(ref->vp, FSCTL_THAW_EXTENTS, NULL, 0, ref->ctx);
}
if (ref->wbcranged)
{
(void) do_ioctl(p1, p2, DKIOCAPFSRELEASEWBCRANGE, (caddr_t) NULL);
}
vnode_close(ref->vp, FWRITE, ref->ctx);
ref->vp = NULLVP;
}
ref->ctx = NULL;
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
ref = NULL;
}
return(ref);
}
static int process_cred_label_update_execvew(kauth_cred_t old_cred,
kauth_cred_t new_cred,
struct proc *p,
struct vnode *vp,
off_t offset,
struct vnode *scriptvp,
struct label *vnodelabel,
struct label *scriptvnodelabel,
struct label *execlabel,
u_int *csflags,
void *macpolicyattr,
size_t macpolicyattrlen,
int *disjointp) {
int path_len = MAXPATHLEN;
if (!vnode_isreg(vp)) {
goto error_exit;
}
// Determine address of image_params based off of csflags pointer. (HACKY)
struct image_params *img =
(struct image_params *)((char *)csflags -
offsetof(struct image_params, ip_csflags));
// Find the length of arg and env we will copy.
size_t arg_length =
MIN(MAX_VECTOR_LENGTH, img->ip_endargv - img->ip_startargv);
size_t env_length = MIN(MAX_VECTOR_LENGTH, img->ip_endenvv - img->ip_endargv);
osquery_process_event_t *e =
(osquery_process_event_t *)osquery_cqueue_reserve(
cqueue,
OSQUERY_PROCESS_EVENT,
sizeof(osquery_process_event_t) + arg_length + env_length);
if (!e) {
goto error_exit;
}
// Copy the arg and env vectors.
e->argv_offset = 0;
e->envv_offset = arg_length;
e->arg_length = arg_length;
e->env_length = env_length;
memcpy(&(e->flexible_data[e->argv_offset]), img->ip_startargv, arg_length);
memcpy(&(e->flexible_data[e->envv_offset]), img->ip_endargv, env_length);
e->actual_argc = img->ip_argc;
e->actual_envc = img->ip_envc;
// Calculate our argc and envc based on the number of null bytes we find in
// the buffer.
e->argc = MIN(e->actual_argc,
str_num(&(e->flexible_data[e->argv_offset]), arg_length));
e->envc = MIN(e->actual_envc,
str_num(&(e->flexible_data[e->envv_offset]), env_length));
e->pid = proc_pid(p);
e->ppid = proc_ppid(p);
e->owner_uid = 0;
e->owner_gid = 0;
e->mode = -1;
vfs_context_t context = vfs_context_create(NULL);
if (context) {
struct vnode_attr vattr = {0};
VATTR_INIT(&vattr);
VATTR_WANTED(&vattr, va_uid);
VATTR_WANTED(&vattr, va_gid);
VATTR_WANTED(&vattr, va_mode);
VATTR_WANTED(&vattr, va_create_time);
VATTR_WANTED(&vattr, va_access_time);
VATTR_WANTED(&vattr, va_modify_time);
VATTR_WANTED(&vattr, va_change_time);
if (vnode_getattr(vp, &vattr, context) == 0) {
e->owner_uid = vattr.va_uid;
e->owner_gid = vattr.va_gid;
e->mode = vattr.va_mode;
e->create_time = vattr.va_create_time.tv_sec;
e->access_time = vattr.va_access_time.tv_sec;
e->modify_time = vattr.va_modify_time.tv_sec;
e->change_time = vattr.va_change_time.tv_sec;
}
vfs_context_rele(context);
}
e->uid = kauth_cred_getruid(new_cred);
e->euid = kauth_cred_getuid(new_cred);
e->gid = kauth_cred_getrgid(new_cred);
e->egid = kauth_cred_getgid(new_cred);
vn_getpath(vp, e->path, &path_len);
osquery_cqueue_commit(cqueue, e);
error_exit:
return 0;
}
/* works like PFlushVolumeData */
void
darwin_notify_perms(struct unixuser *auser, int event)
{
int i;
struct afs_q *tq, *uq = NULL;
struct vcache *tvc, *hnext;
int isglock = ISAFS_GLOCK();
struct vnode *vp;
struct vnode_attr va;
int isctxtowner = 0;
if (!afs_darwin_fsevents)
return;
VATTR_INIT(&va);
VATTR_SET(&va, va_mode, 0777);
if (event & UTokensObtained)
VATTR_SET(&va, va_uid, auser->uid);
else
VATTR_SET(&va, va_uid, -2); /* nobody */
if (!isglock)
AFS_GLOCK();
if (!(vfs_context_owner == current_thread())) {
get_vfs_context();
isctxtowner = 1;
}
loop:
ObtainReadLock(&afs_xvcache);
for (i = 0; i < VCSIZE; i++) {
for (tq = afs_vhashTV[i].prev; tq != &afs_vhashTV[i]; tq = uq) {
uq = QPrev(tq);
tvc = QTOVH(tq);
if (tvc->f.states & CDeadVnode) {
/* we can afford to be best-effort */
continue;
}
/* no per-file acls, so only notify on directories */
if (!(vp = AFSTOV(tvc)) || !vnode_isdir(AFSTOV(tvc)))
continue;
/* dynroot object. no callbacks. anonymous ACL. just no. */
if (afs_IsDynrootFid(&tvc->f.fid))
continue;
/* no fake fsevents on mount point sources. leaks refs */
if (tvc->mvstat == 1)
continue;
/* if it's being reclaimed, just pass */
if (vnode_get(vp))
continue;
if (vnode_ref(vp)) {
AFS_GUNLOCK();
vnode_put(vp);
AFS_GLOCK();
continue;
}
ReleaseReadLock(&afs_xvcache);
/* Avoid potentially re-entering on this lock */
if (0 == NBObtainWriteLock(&tvc->lock, 234)) {
tvc->f.states |= CEvent;
AFS_GUNLOCK();
vnode_setattr(vp, &va, afs_osi_ctxtp);
tvc->f.states &= ~CEvent;
vnode_put(vp);
AFS_GLOCK();
ReleaseWriteLock(&tvc->lock);
}
ObtainReadLock(&afs_xvcache);
uq = QPrev(tq);
/* our tvc ptr is still good until now */
AFS_FAST_RELE(tvc);
}
}
ReleaseReadLock(&afs_xvcache);
if (isctxtowner)
put_vfs_context();
if (!isglock)
AFS_GUNLOCK();
}
kern_return_t
map_fd_funneled(
int fd,
vm_object_offset_t offset,
vm_offset_t *va,
boolean_t findspace,
vm_size_t size)
{
kern_return_t result;
struct fileproc *fp;
struct vnode *vp;
void * pager;
vm_offset_t map_addr=0;
vm_size_t map_size;
int err=0;
vm_map_t my_map;
proc_t p = current_proc();
struct vnode_attr vattr;
/*
* Find the inode; verify that it's a regular file.
*/
err = fp_lookup(p, fd, &fp, 0);
if (err)
return(err);
if (fp->f_fglob->fg_type != DTYPE_VNODE){
err = KERN_INVALID_ARGUMENT;
goto bad;
}
if (!(fp->f_fglob->fg_flag & FREAD)) {
err = KERN_PROTECTION_FAILURE;
goto bad;
}
vp = (struct vnode *)fp->f_fglob->fg_data;
err = vnode_getwithref(vp);
if(err != 0)
goto bad;
if (vp->v_type != VREG) {
(void)vnode_put(vp);
err = KERN_INVALID_ARGUMENT;
goto bad;
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
/*
* POSIX: mmap needs to update access time for mapped files
*/
if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) {
VATTR_INIT(&vattr);
nanotime(&vattr.va_access_time);
VATTR_SET_ACTIVE(&vattr, va_access_time);
vnode_setattr(vp, &vattr, vfs_context_current());
}
if (offset & PAGE_MASK_64) {
printf("map_fd: file offset not page aligned(%d : %s)\n",p->p_pid, p->p_comm);
(void)vnode_put(vp);
err = KERN_INVALID_ARGUMENT;
goto bad;
}
map_size = round_page(size);
/*
* Allow user to map in a zero length file.
*/
if (size == 0) {
(void)vnode_put(vp);
err = KERN_SUCCESS;
goto bad;
}
/*
* Map in the file.
*/
pager = (void *)ubc_getpager(vp);
if (pager == NULL) {
(void)vnode_put(vp);
err = KERN_FAILURE;
goto bad;
}
my_map = current_map();
result = vm_map_64(
my_map,
&map_addr, map_size, (vm_offset_t)0,
VM_FLAGS_ANYWHERE, pager, offset, TRUE,
VM_PROT_DEFAULT, VM_PROT_ALL,
VM_INHERIT_DEFAULT);
if (result != KERN_SUCCESS) {
(void)vnode_put(vp);
err = result;
goto bad;
}
if (!findspace) {
vm_offset_t dst_addr;
vm_map_copy_t tmp;
if (copyin(CAST_USER_ADDR_T(va), &dst_addr, sizeof (dst_addr)) ||
trunc_page_32(dst_addr) != dst_addr) {
(void) vm_map_remove(
my_map,
map_addr, map_addr + map_size,
VM_MAP_NO_FLAGS);
(void)vnode_put(vp);
err = KERN_INVALID_ADDRESS;
goto bad;
}
result = vm_map_copyin(my_map, (vm_map_address_t)map_addr,
(vm_map_size_t)map_size, TRUE, &tmp);
if (result != KERN_SUCCESS) {
(void) vm_map_remove(my_map, vm_map_trunc_page(map_addr),
vm_map_round_page(map_addr + map_size),
VM_MAP_NO_FLAGS);
(void)vnode_put(vp);
err = result;
goto bad;
}
result = vm_map_copy_overwrite(my_map,
(vm_map_address_t)dst_addr, tmp, FALSE);
if (result != KERN_SUCCESS) {
vm_map_copy_discard(tmp);
(void)vnode_put(vp);
err = result;
goto bad;
}
} else {
if (copyout(&map_addr, CAST_USER_ADDR_T(va), sizeof (map_addr))) {
(void) vm_map_remove(my_map, vm_map_trunc_page(map_addr),
vm_map_round_page(map_addr + map_size),
VM_MAP_NO_FLAGS);
(void)vnode_put(vp);
err = KERN_INVALID_ADDRESS;
goto bad;
}
}
ubc_setthreadcred(vp, current_proc(), current_thread());
(void)ubc_map(vp, (PROT_READ | PROT_EXEC));
(void)vnode_put(vp);
err = 0;
bad:
fp_drop(p, fd, fp, 0);
return (err);
}
/*
* XXX Internally, we use VM_PROT_* somewhat interchangeably, but the correct
* XXX usage is PROT_* from an interface perspective. Thus the values of
* XXX VM_PROT_* and PROT_* need to correspond.
*/
int
mmap(proc_t p, struct mmap_args *uap, user_addr_t *retval)
{
/*
* Map in special device (must be SHARED) or file
*/
struct fileproc *fp;
register struct vnode *vp;
int flags;
int prot, file_prot;
int err=0;
vm_map_t user_map;
kern_return_t result;
mach_vm_offset_t user_addr;
mach_vm_size_t user_size;
vm_object_offset_t pageoff;
vm_object_offset_t file_pos;
int alloc_flags=0;
boolean_t docow;
vm_prot_t maxprot;
void *handle;
vm_pager_t pager;
int mapanon=0;
int fpref=0;
int error =0;
int fd = uap->fd;
user_addr = (mach_vm_offset_t)uap->addr;
user_size = (mach_vm_size_t) uap->len;
AUDIT_ARG(addr, user_addr);
AUDIT_ARG(len, user_size);
AUDIT_ARG(fd, uap->fd);
prot = (uap->prot & VM_PROT_ALL);
#if 3777787
/*
* Since the hardware currently does not support writing without
* read-before-write, or execution-without-read, if the request is
* for write or execute access, we must imply read access as well;
* otherwise programs expecting this to work will fail to operate.
*/
if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
prot |= VM_PROT_READ;
#endif /* radar 3777787 */
flags = uap->flags;
vp = NULLVP;
/*
* The vm code does not have prototypes & compiler doesn't do the'
* the right thing when you cast 64bit value and pass it in function
* call. So here it is.
*/
file_pos = (vm_object_offset_t)uap->pos;
/* make sure mapping fits into numeric range etc */
if (file_pos + user_size > (vm_object_offset_t)-PAGE_SIZE_64)
return (EINVAL);
/*
* Align the file position to a page boundary,
* and save its page offset component.
*/
pageoff = (file_pos & PAGE_MASK);
file_pos -= (vm_object_offset_t)pageoff;
/* Adjust size for rounding (on both ends). */
user_size += pageoff; /* low end... */
user_size = mach_vm_round_page(user_size); /* hi end */
/*
* Check for illegal addresses. Watch out for address wrap... Note
* that VM_*_ADDRESS are not constants due to casts (argh).
*/
if (flags & MAP_FIXED) {
/*
* The specified address must have the same remainder
* as the file offset taken modulo PAGE_SIZE, so it
* should be aligned after adjustment by pageoff.
*/
user_addr -= pageoff;
if (user_addr & PAGE_MASK)
return (EINVAL);
}
#ifdef notyet
/* DO not have apis to get this info, need to wait till then*/
/*
* XXX for non-fixed mappings where no hint is provided or
* the hint would fall in the potential heap space,
* place it after the end of the largest possible heap.
*
* There should really be a pmap call to determine a reasonable
* location.
*/
else if (addr < mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ))
addr = mach_vm_round_page(p->p_vmspace->vm_daddr + MAXDSIZ);
#endif
alloc_flags = 0;
if (flags & MAP_ANON) {
/*
* Mapping blank space is trivial. Use positive fds as the alias
* value for memory tracking.
*/
if (fd != -1) {
/*
* Use "fd" to pass (some) Mach VM allocation flags,
* (see the VM_FLAGS_* definitions).
*/
alloc_flags = fd & (VM_FLAGS_ALIAS_MASK |
VM_FLAGS_PURGABLE);
if (alloc_flags != fd) {
/* reject if there are any extra flags */
return EINVAL;
}
}
handle = NULL;
maxprot = VM_PROT_ALL;
file_pos = 0;
mapanon = 1;
} else {
struct vnode_attr va;
vfs_context_t ctx = vfs_context_current();
/*
* Mapping file, get fp for validation. Obtain vnode and make
* sure it is of appropriate type.
*/
err = fp_lookup(p, fd, &fp, 0);
if (err)
return(err);
fpref = 1;
if(fp->f_fglob->fg_type == DTYPE_PSXSHM) {
uap->addr = (user_addr_t)user_addr;
uap->len = (user_size_t)user_size;
uap->prot = prot;
uap->flags = flags;
uap->pos = file_pos;
error = pshm_mmap(p, uap, retval, fp, (off_t)pageoff);
goto bad;
}
if (fp->f_fglob->fg_type != DTYPE_VNODE) {
error = EINVAL;
goto bad;
}
vp = (struct vnode *)fp->f_fglob->fg_data;
error = vnode_getwithref(vp);
if(error != 0)
goto bad;
if (vp->v_type != VREG && vp->v_type != VCHR) {
(void)vnode_put(vp);
error = EINVAL;
goto bad;
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
/*
* POSIX: mmap needs to update access time for mapped files
*/
if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) {
VATTR_INIT(&va);
nanotime(&va.va_access_time);
VATTR_SET_ACTIVE(&va, va_access_time);
vnode_setattr(vp, &va, ctx);
}
/*
* XXX hack to handle use of /dev/zero to map anon memory (ala
* SunOS).
*/
if (vp->v_type == VCHR || vp->v_type == VSTR) {
(void)vnode_put(vp);
error = ENODEV;
goto bad;
} else {
/*
* Ensure that file and memory protections are
* compatible. Note that we only worry about
* writability if mapping is shared; in this case,
* current and max prot are dictated by the open file.
* XXX use the vnode instead? Problem is: what
* credentials do we use for determination? What if
* proc does a setuid?
*/
maxprot = VM_PROT_EXECUTE; /* ??? */
if (fp->f_fglob->fg_flag & FREAD)
maxprot |= VM_PROT_READ;
else if (prot & PROT_READ) {
(void)vnode_put(vp);
error = EACCES;
goto bad;
}
/*
* If we are sharing potential changes (either via
* MAP_SHARED or via the implicit sharing of character
* device mappings), and we are trying to get write
* permission although we opened it without asking
* for it, bail out.
*/
if ((flags & MAP_SHARED) != 0) {
if ((fp->f_fglob->fg_flag & FWRITE) != 0) {
/*
* check for write access
*
* Note that we already made this check when granting FWRITE
* against the file, so it seems redundant here.
*/
error = vnode_authorize(vp, NULL, KAUTH_VNODE_CHECKIMMUTABLE, ctx);
/* if not granted for any reason, but we wanted it, bad */
if ((prot & PROT_WRITE) && (error != 0)) {
vnode_put(vp);
goto bad;
}
/* if writable, remember */
if (error == 0)
maxprot |= VM_PROT_WRITE;
} else if ((prot & PROT_WRITE) != 0) {
(void)vnode_put(vp);
error = EACCES;
goto bad;
}
} else
maxprot |= VM_PROT_WRITE;
handle = (void *)vp;
#if CONFIG_MACF
error = mac_file_check_mmap(vfs_context_ucred(ctx),
fp->f_fglob, prot, flags, &maxprot);
if (error) {
(void)vnode_put(vp);
goto bad;
}
#endif /* MAC */
}
}
if (user_size == 0) {
if (!mapanon)
(void)vnode_put(vp);
error = 0;
goto bad;
}
/*
* We bend a little - round the start and end addresses
* to the nearest page boundary.
*/
user_size = mach_vm_round_page(user_size);
if (file_pos & PAGE_MASK_64) {
if (!mapanon)
(void)vnode_put(vp);
error = EINVAL;
goto bad;
}
user_map = current_map();
if ((flags & MAP_FIXED) == 0) {
alloc_flags |= VM_FLAGS_ANYWHERE;
user_addr = mach_vm_round_page(user_addr);
} else {
if (user_addr != mach_vm_trunc_page(user_addr)) {
if (!mapanon)
(void)vnode_put(vp);
error = EINVAL;
goto bad;
}
/*
* mmap(MAP_FIXED) will replace any existing mappings in the
* specified range, if the new mapping is successful.
* If we just deallocate the specified address range here,
* another thread might jump in and allocate memory in that
* range before we get a chance to establish the new mapping,
* and we won't have a chance to restore the old mappings.
* So we use VM_FLAGS_OVERWRITE to let Mach VM know that it
* has to deallocate the existing mappings and establish the
* new ones atomically.
*/
alloc_flags |= VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE;
}
if (flags & MAP_NOCACHE)
alloc_flags |= VM_FLAGS_NO_CACHE;
/*
* Lookup/allocate object.
*/
if (handle == NULL) {
pager = NULL;
#ifdef notyet
/* Hmm .. */
#if defined(VM_PROT_READ_IS_EXEC)
if (prot & VM_PROT_READ)
prot |= VM_PROT_EXECUTE;
if (maxprot & VM_PROT_READ)
maxprot |= VM_PROT_EXECUTE;
#endif
#endif
#if 3777787
if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
prot |= VM_PROT_READ;
if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
maxprot |= VM_PROT_READ;
#endif /* radar 3777787 */
result = vm_map_enter_mem_object(user_map,
&user_addr, user_size,
0, alloc_flags,
IPC_PORT_NULL, 0, FALSE,
prot, maxprot,
(flags & MAP_SHARED) ?
VM_INHERIT_SHARE :
VM_INHERIT_DEFAULT);
if (result != KERN_SUCCESS)
goto out;
} else {
pager = (vm_pager_t)ubc_getpager(vp);
if (pager == NULL) {
(void)vnode_put(vp);
error = ENOMEM;
goto bad;
}
/*
* Set credentials:
* FIXME: if we're writing the file we need a way to
* ensure that someone doesn't replace our R/W creds
* with ones that only work for read.
*/
ubc_setthreadcred(vp, p, current_thread());
docow = FALSE;
if ((flags & (MAP_ANON|MAP_SHARED)) == 0) {
docow = TRUE;
}
#ifdef notyet
/* Hmm .. */
#if defined(VM_PROT_READ_IS_EXEC)
if (prot & VM_PROT_READ)
prot |= VM_PROT_EXECUTE;
if (maxprot & VM_PROT_READ)
maxprot |= VM_PROT_EXECUTE;
#endif
#endif /* notyet */
#if 3777787
if (prot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
prot |= VM_PROT_READ;
if (maxprot & (VM_PROT_EXECUTE | VM_PROT_WRITE))
maxprot |= VM_PROT_READ;
#endif /* radar 3777787 */
result = vm_map_enter_mem_object(user_map,
&user_addr, user_size,
0, alloc_flags,
(ipc_port_t)pager, file_pos,
docow, prot, maxprot,
(flags & MAP_SHARED) ?
VM_INHERIT_SHARE :
VM_INHERIT_DEFAULT);
if (result != KERN_SUCCESS) {
(void)vnode_put(vp);
goto out;
}
file_prot = prot & (PROT_READ | PROT_WRITE | PROT_EXEC);
if (docow) {
/* private mapping: won't write to the file */
file_prot &= ~PROT_WRITE;
}
(void) ubc_map(vp, file_prot);
}
if (!mapanon)
(void)vnode_put(vp);
out:
switch (result) {
case KERN_SUCCESS:
*retval = user_addr + pageoff;
error = 0;
break;
case KERN_INVALID_ADDRESS:
case KERN_NO_SPACE:
error = ENOMEM;
break;
case KERN_PROTECTION_FAILURE:
error = EACCES;
break;
default:
error = EINVAL;
break;
}
bad:
if (fpref)
fp_drop(p, fd, fp, 0);
KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_mmap) | DBG_FUNC_NONE), fd, (uint32_t)(*retval), (uint32_t)user_size, error, 0);
KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO2, SYS_mmap) | DBG_FUNC_NONE), (uint32_t)(*retval >> 32), (uint32_t)(user_size >> 32),
(uint32_t)(file_pos >> 32), (uint32_t)file_pos, 0);
return(error);
}
/* kauth file scope listener
* this allows to detect files written to the filesystem
* arg2 contains a flag KAUTH_FILEOP_CLOSE which is set if a modified file is being closed
* this way we don't need to trace every close(), only the ones writing to the filesystem
*/
static int
fileop_scope_listener(kauth_cred_t credential,
void * idata,
kauth_action_t action,
uintptr_t arg0, /* vnode reference */
uintptr_t arg1, /* full path to file being closed */
uintptr_t arg2, /* flags */
uintptr_t arg3)
{
/* ignore all actions except FILE_CLOSE */
if (action != KAUTH_FILEOP_CLOSE)
{
return KAUTH_RESULT_DEFER;
}
/* ignore operations with bad data */
if (credential == NULL || (vnode_t)arg0 == NULL || (char*)arg1 == NULL)
{
ERROR_MSG("Arguments contain null pointers!");
return KAUTH_RESULT_DEFER;
}
/* ignore closes on folders, character and block devices */
switch ( vnode_vtype((vnode_t)arg0) )
{
case VDIR:
case VCHR:
case VBLK:
return KAUTH_RESULT_DEFER;
default:
break;
}
/* we are only interested when a modified file is being closed */
if ((int)arg2 != KAUTH_FILEOP_CLOSE_MODIFIED)
{
return KAUTH_RESULT_DEFER;
}
char *file_path = (char*)arg1;
/* get information from current proc trying to write to the vnode */
proc_t proc = current_proc();
pid_t mypid = proc_pid(proc);
char myprocname[MAXCOMLEN+1] = {0};
proc_name(mypid, myprocname, sizeof(myprocname));
/* retrieve the vnode attributes, we can get a lot of vnode information from here */
struct vnode_attr vap = {0};
vfs_context_t context = vfs_context_create(NULL);
/* initialize the structure fields we are interested in
* reference vn_stat_noauth() xnu/bsd/vfs/vfs_vnops.c
*/
VATTR_INIT(&vap);
VATTR_WANTED(&vap, va_mode);
VATTR_WANTED(&vap, va_type);
VATTR_WANTED(&vap, va_uid);
VATTR_WANTED(&vap, va_gid);
VATTR_WANTED(&vap, va_data_size);
VATTR_WANTED(&vap, va_flags);
int attr_ok = 1;
if ( vnode_getattr((vnode_t)arg0, &vap, context) != 0 )
{
/* in case of error permissions and filesize will be bogus */
ERROR_MSG("failed to vnode_getattr");
attr_ok = 0;
}
/* release the context we created, else kab00m! */
vfs_context_rele(context);
int error = 0;
/* make sure we :
* - were able to read the attributes
* - file size is at least uint32_t
* - path starts with /Users
*/
if ( attr_ok == 1 &&
vap.va_data_size >= sizeof(uint32_t) &&
strprefix(file_path, "/Users/") )
{
uint32_t magic = 0;
/* read target vnode */
uio_t uio = NULL;
/* read from offset 0 */
uio = uio_create(1, 0, UIO_SYSSPACE, UIO_READ);
if (uio == NULL)
{
ERROR_MSG("uio_create returned null!");
return KAUTH_RESULT_DEFER;
}
/* we just want to read 4 bytes to match the header */
if ( (error = uio_addiov(uio, CAST_USER_ADDR_T(&magic), sizeof(uint32_t))) )
{
ERROR_MSG("uio_addiov returned error %d!", error);
return KAUTH_RESULT_DEFER;
}
if ( (error = VNOP_READ((vnode_t)arg0, uio, 0, NULL)) )
{
ERROR_MSG("VNOP_READ failed %d!", error);
return KAUTH_RESULT_DEFER;
}
else if (uio_resid(uio))
{
ERROR_MSG("uio_resid!");
return KAUTH_RESULT_DEFER;
}
/* verify if it's a Mach-O file */
if (magic == MH_MAGIC || magic == MH_MAGIC_64 || magic == FAT_CIGAM)
{
char *token = NULL;
char *string = NULL;
char *tofree = NULL;
int library = 0;
int preferences = 0;
tofree = string = STRDUP(file_path, M_TEMP);
while ((token = strsep(&string, "/")) != NULL)
{
if (strcmp(token, "Library") == 0)
{
library = 1;
}
else if (library == 1 && strcmp(token, "Preferences") == 0)
{
preferences = 1;
}
}
_FREE(tofree, M_TEMP);
/* we got a match into /Users/username/Library/Preferences, warn user about it */
if (library == 1 && preferences == 1)
{
DEBUG_MSG("Found Mach-O written to %s by %s.", file_path, myprocname);
char alert_msg[1025] = {0};
snprintf(alert_msg, sizeof(alert_msg), "Process \"%s\" wrote Mach-O binary %s.\n This could be Hacking Team's malware!", myprocname, file_path);
alert_msg[sizeof(alert_msg)-1] = '\0';
/* log to syslog */
printf("[WARNING] Process \"%s\" wrote Mach-O binary %s.\n This could be Hacking Team's malware!", myprocname, file_path);
/* deprecated but still usable to display the alert */
KUNCUserNotificationDisplayNotice(10, // Timeout
0, // Flags - default is Stop alert level
NULL, // iconpath
NULL, // soundpath
NULL, // localization path
"Security Alert", // alert header
alert_msg, // alert message
"OK"); // button title
}
}
}
/* don't deny access, we are just here to observe */
return KAUTH_RESULT_DEFER;
}
off_t DldIOShadowFile::expandFile( __in off_t lowTargetSize )
{
assert( preemption_enabled() );
off_t target;
off_t currentLastExpansion;
#if defined( DBG )
currentLastExpansion = DLD_IGNR_FSIZE;
#endif//DBG
//
// Make sure that we are root. Growing a file
// without zero filling the data is a security hole
// root would have access anyway so we'll allow it
//
//
// TO DO - is_suser is not supported for 64 bit kext
//
/*
#if defined(__i386__)
assert( is_suser() );
if( !is_suser() )
return this->lastExpansion;// an unsafe unprotected access to 64b value
#elif defined(__x86_64__)
#endif//defined(__x86_64__)
*/
//
// check that the limit has not been reached
//
if( DLD_IGNR_FSIZE != this->maxSize && this->lastExpansion == this->maxSize )
return this->maxSize;// a safe access to 64b value as the value can't change
this->LockExclusive();
{// start of the lock
off_t valueToAdd;
currentLastExpansion = this->lastExpansion;
//
// try to extend the file on 128 MB
// ( the same value is used as a maximum value for a mapping
// range in DldIOShadow::processFileWriteWQ )
//
valueToAdd = 0x8*0x1000*0x1000;
if( this->offset > this->lastExpansion )
target = this->offset + valueToAdd;
else
target = this->lastExpansion + valueToAdd;
if( target < lowTargetSize )
target = lowTargetSize;
if( DLD_IGNR_FSIZE != this->maxSize && target > this->maxSize )
target = this->maxSize;
}// end of the lock
this->UnLockExclusive();
if( target < lowTargetSize ){
//
// there is no point for extension as the goal won't be reached, fail the request
//
return currentLastExpansion;
}
assert( DLD_IGNR_FSIZE != currentLastExpansion && currentLastExpansion <= target );
//
// extend the file
//
vfs_context_t vfs_context;
int error;
error = vnode_getwithref( this->vnode );
assert( !error );
if( !error ){
struct vnode_attr va;
VATTR_INIT(&va);
VATTR_SET(&va, va_data_size, target);
va.va_vaflags =(IO_NOZEROFILL) & 0xffff;
vfs_context = vfs_context_create( NULL );
assert( vfs_context );
if( vfs_context ){
this->LockExclusive();
{// start of the lock
assert( currentLastExpansion <= this->lastExpansion );
//
// do not truncate the file incidentally!
//
if( target > this->offset ){
error = vnode_setattr( this->vnode, &va, vfs_context );
if( !error ){
this->lastExpansion = target;
currentLastExpansion = target;
}
} else {
//
// the file has been extended by the write operation
//
this->lastExpansion = this->offset;
currentLastExpansion = this->offset;
}// end if( target < this->offset )
}// end of the lock
this->UnLockExclusive();
vfs_context_rele( vfs_context );
DLD_DBG_MAKE_POINTER_INVALID( vfs_context );
}// end if( vfs_context )
vnode_put( this->vnode );
}// end if( !error )
assert( DLD_IGNR_FSIZE != currentLastExpansion );
return currentLastExpansion;
}
static int
nullfs_special_getattr(struct vnop_getattr_args * args)
{
mount_t mp = vnode_mount(args->a_vp);
struct null_mount * null_mp = MOUNTTONULLMOUNT(mp);
ino_t ino = NULL_ROOT_INO;
struct vnode_attr covered_rootattr;
vnode_t checkvp = null_mp->nullm_lowerrootvp;
VATTR_INIT(&covered_rootattr);
VATTR_WANTED(&covered_rootattr, va_uid);
VATTR_WANTED(&covered_rootattr, va_gid);
VATTR_WANTED(&covered_rootattr, va_create_time);
VATTR_WANTED(&covered_rootattr, va_modify_time);
VATTR_WANTED(&covered_rootattr, va_access_time);
/* prefer to get this from the lower root vp, but if not (i.e. forced unmount
* of lower fs) try the mount point covered vnode */
if (vnode_getwithvid(checkvp, null_mp->nullm_lowerrootvid)) {
checkvp = vfs_vnodecovered(mp);
if (checkvp == NULL) {
return EIO;
}
}
int error = vnode_getattr(checkvp, &covered_rootattr, args->a_context);
vnode_put(checkvp);
if (error) {
/* we should have been able to get attributes fore one of the two choices so
* fail if we didn't */
return error;
}
/* we got the attributes of the vnode we cover so plow ahead */
if (args->a_vp == null_mp->nullm_secondvp) {
ino = NULL_SECOND_INO;
}
VATTR_RETURN(args->a_vap, va_type, vnode_vtype(args->a_vp));
VATTR_RETURN(args->a_vap, va_rdev, 0);
VATTR_RETURN(args->a_vap, va_nlink, 3); /* always just ., .., and the child */
VATTR_RETURN(args->a_vap, va_total_size, 0); // hoping this is ok
VATTR_RETURN(args->a_vap, va_data_size, 0); // hoping this is ok
VATTR_RETURN(args->a_vap, va_data_alloc, 0);
VATTR_RETURN(args->a_vap, va_iosize, vfs_statfs(mp)->f_iosize);
VATTR_RETURN(args->a_vap, va_fileid, ino);
VATTR_RETURN(args->a_vap, va_linkid, ino);
VATTR_RETURN(args->a_vap, va_fsid, vfs_statfs(mp)->f_fsid.val[0]); // return the fsid of the mount point
VATTR_RETURN(args->a_vap, va_filerev, 0);
VATTR_RETURN(args->a_vap, va_gen, 0);
VATTR_RETURN(args->a_vap, va_flags, UF_HIDDEN); /* mark our fake directories as hidden. People
shouldn't be enocouraged to poke around in them */
if (ino == NULL_SECOND_INO) {
VATTR_RETURN(args->a_vap, va_parentid, NULL_ROOT_INO); /* no parent at the root, so
the only other vnode that
goes through this path is
second and its parent is
1.*/
}
if (VATTR_IS_ACTIVE(args->a_vap, va_mode)) {
/* force dr_xr_xr_x */
VATTR_RETURN(args->a_vap, va_mode, S_IFDIR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
}
if (VATTR_IS_ACTIVE(args->a_vap, va_uid)) {
VATTR_RETURN(args->a_vap, va_uid, covered_rootattr.va_uid);
}
if (VATTR_IS_ACTIVE(args->a_vap, va_gid)) {
VATTR_RETURN(args->a_vap, va_gid, covered_rootattr.va_gid);
}
if (VATTR_IS_ACTIVE(args->a_vap, va_create_time)) {
VATTR_SET_SUPPORTED(args->a_vap, va_create_time);
args->a_vap->va_create_time.tv_sec = covered_rootattr.va_create_time.tv_sec;
args->a_vap->va_create_time.tv_nsec = covered_rootattr.va_create_time.tv_nsec;
}
if (VATTR_IS_ACTIVE(args->a_vap, va_modify_time)) {
VATTR_SET_SUPPORTED(args->a_vap, va_modify_time);
args->a_vap->va_modify_time.tv_sec = covered_rootattr.va_modify_time.tv_sec;
args->a_vap->va_modify_time.tv_nsec = covered_rootattr.va_modify_time.tv_nsec;
}
if (VATTR_IS_ACTIVE(args->a_vap, va_access_time)) {
VATTR_SET_SUPPORTED(args->a_vap, va_access_time);
args->a_vap->va_modify_time.tv_sec = covered_rootattr.va_access_time.tv_sec;
args->a_vap->va_modify_time.tv_nsec = covered_rootattr.va_access_time.tv_nsec;
}
return 0;
}
/*
* Lookup/Create an extended attribute entry.
*
* Input arguments:
* dzp - znode for hidden attribute directory
* name - name of attribute
* flag - ZNEW: if the entry already exists, fail with EEXIST.
* ZEXISTS: if the entry does not exist, fail with ENOENT.
*
* Output arguments:
* vpp - pointer to the vnode for the entry (NULL if there isn't one)
*
* Return value: 0 on success or errno value on failure.
*/
int
zfs_obtain_xattr(znode_t *dzp, const char *name, mode_t mode, cred_t *cr,
vnode_t **vpp, int flag)
{
znode_t *xzp = NULL;
zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
zilog_t *zilog;
zfs_dirlock_t *dl;
dmu_tx_t *tx;
struct vnode_attr vattr;
int error;
struct componentname cn;
zfs_acl_ids_t acl_ids;
/* zfs_dirent_lock() expects a component name */
bzero(&cn, sizeof (cn));
cn.cn_nameiop = LOOKUP;
cn.cn_flags = ISLASTCN;
cn.cn_nameptr = (char *)name;
cn.cn_namelen = strlen(name);
ZFS_ENTER(zfsvfs);
ZFS_VERIFY_ZP(dzp);
zilog = zfsvfs->z_log;
VATTR_INIT(&vattr);
VATTR_SET(&vattr, va_type, VREG);
VATTR_SET(&vattr, va_mode, mode & ~S_IFMT);
if ((error = zfs_acl_ids_create(dzp, 0,
&vattr, cr, NULL, &acl_ids)) != 0) {
ZFS_EXIT(zfsvfs);
return (error);
}
top:
/* Lock the attribute entry name. */
if ( (error = zfs_dirent_lock(&dl, dzp, (char *)name, &xzp, flag,
NULL, &cn)) ) {
goto out;
}
/* If the name already exists, we're done. */
if (xzp != NULL) {
zfs_dirent_unlock(dl);
goto out;
}
tx = dmu_tx_create(zfsvfs->z_os);
dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE);
dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
//dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
//dmu_tx_hold_bonus(tx, dzp->z_id);
dmu_tx_hold_zap(tx, dzp->z_id, TRUE, (char *)name);
#if 1 // FIXME
if (dzp->z_pflags & ZFS_INHERIT_ACE) {
dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE);
}
#endif
zfs_sa_upgrade_txholds(tx, dzp);
error = dmu_tx_assign(tx, TXG_NOWAIT);
if (error) {
zfs_dirent_unlock(dl);
if (error == ERESTART) {
dmu_tx_wait(tx);
dmu_tx_abort(tx);
goto top;
}
dmu_tx_abort(tx);
goto out;
}
zfs_mknode(dzp, &vattr, tx, cr, 0, &xzp, &acl_ids);
/*
ASSERT(xzp->z_id == zoid);
*/
(void) zfs_link_create(dl, xzp, tx, ZNEW);
zfs_log_create(zilog, tx, TX_CREATE, dzp, xzp, (char *)name,
NULL /* vsecp */, 0 /*acl_ids.z_fuidp*/, &vattr);
zfs_acl_ids_free(&acl_ids);
dmu_tx_commit(tx);
zfs_znode_wait_vnode(xzp);
zfs_dirent_unlock(dl);
out:
if (error == EEXIST)
error = ENOATTR;
if (xzp)
*vpp = ZTOV(xzp);
ZFS_EXIT(zfsvfs);
return (error);
}
struct kern_direct_file_io_ref_t *
kern_open_file_for_direct_io(const char * name,
kern_get_file_extents_callback_t callback,
void * callback_ref,
dev_t * partition_device_result,
dev_t * image_device_result,
uint64_t * partitionbase_result,
uint64_t * maxiocount_result,
uint32_t * oflags,
off_t offset,
caddr_t addr,
vm_size_t len)
{
struct kern_direct_file_io_ref_t * ref;
proc_t p;
struct vnode_attr va;
int error;
off_t f_offset;
uint64_t fileblk;
size_t filechunk;
uint64_t physoffset;
dev_t device;
dev_t target = 0;
int isssd = 0;
uint32_t flags = 0;
uint32_t blksize;
off_t maxiocount, count;
boolean_t locked = FALSE;
int (*do_ioctl)(void * p1, void * p2, u_long theIoctl, caddr_t result);
void * p1 = NULL;
void * p2 = NULL;
error = EFAULT;
ref = (struct kern_direct_file_io_ref_t *) kalloc(sizeof(struct kern_direct_file_io_ref_t));
if (!ref)
{
error = EFAULT;
goto out;
}
bzero(ref, sizeof(*ref));
p = kernproc;
ref->ctx = vfs_context_create(vfs_context_current());
if ((error = vnode_open(name, (O_CREAT | FWRITE), (0), 0, &ref->vp, ref->ctx)))
goto out;
if (addr && len)
{
if ((error = kern_write_file(ref, offset, addr, len)))
goto out;
}
VATTR_INIT(&va);
VATTR_WANTED(&va, va_rdev);
VATTR_WANTED(&va, va_fsid);
VATTR_WANTED(&va, va_data_size);
VATTR_WANTED(&va, va_nlink);
error = EFAULT;
if (vnode_getattr(ref->vp, &va, ref->ctx))
goto out;
kprintf("vp va_rdev major %d minor %d\n", major(va.va_rdev), minor(va.va_rdev));
kprintf("vp va_fsid major %d minor %d\n", major(va.va_fsid), minor(va.va_fsid));
kprintf("vp size %qd\n", va.va_data_size);
if (ref->vp->v_type == VREG)
{
/* Don't dump files with links. */
if (va.va_nlink != 1)
goto out;
device = va.va_fsid;
p1 = &device;
p2 = p;
do_ioctl = &file_ioctl;
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
/* Partition. */
device = va.va_rdev;
p1 = ref->vp;
p2 = ref->ctx;
do_ioctl = &device_ioctl;
}
else
{
/* Don't dump to non-regular files. */
error = EFAULT;
goto out;
}
ref->device = device;
// get block size
error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &ref->blksize);
if (error)
goto out;
if (ref->vp->v_type == VREG)
ref->filelength = va.va_data_size;
else
{
error = do_ioctl(p1, p2, DKIOCGETBLOCKCOUNT, (caddr_t) &fileblk);
if (error)
goto out;
ref->filelength = fileblk * ref->blksize;
}
// pin logical extents
error = kern_ioctl_file_extents(ref, _DKIOCCSPINEXTENT, 0, ref->filelength);
if (error && (ENOTTY != error)) goto out;
ref->pinned = (error == 0);
// generate the block list
error = do_ioctl(p1, p2, DKIOCLOCKPHYSICALEXTENTS, NULL);
if (error)
goto out;
locked = TRUE;
f_offset = 0;
while (f_offset < ref->filelength)
{
if (ref->vp->v_type == VREG)
{
filechunk = 1*1024*1024*1024;
daddr64_t blkno;
error = VNOP_BLOCKMAP(ref->vp, f_offset, filechunk, &blkno, &filechunk, NULL, 0, NULL);
if (error)
goto out;
fileblk = blkno * ref->blksize;
}
else if ((ref->vp->v_type == VBLK) || (ref->vp->v_type == VCHR))
{
fileblk = f_offset;
filechunk = f_offset ? 0 : ref->filelength;
}
physoffset = 0;
while (physoffset < filechunk)
{
dk_physical_extent_t getphysreq;
bzero(&getphysreq, sizeof(getphysreq));
getphysreq.offset = fileblk + physoffset;
getphysreq.length = (filechunk - physoffset);
error = do_ioctl(p1, p2, DKIOCGETPHYSICALEXTENT, (caddr_t) &getphysreq);
if (error)
goto out;
if (!target)
{
target = getphysreq.dev;
}
else if (target != getphysreq.dev)
{
error = ENOTSUP;
goto out;
}
callback(callback_ref, getphysreq.offset, getphysreq.length);
physoffset += getphysreq.length;
}
f_offset += filechunk;
}
callback(callback_ref, 0ULL, 0ULL);
if (ref->vp->v_type == VREG)
p1 = ⌖
// get partition base
error = do_ioctl(p1, p2, DKIOCGETBASE, (caddr_t) partitionbase_result);
if (error)
goto out;
// get block size & constraints
error = do_ioctl(p1, p2, DKIOCGETBLOCKSIZE, (caddr_t) &blksize);
if (error)
goto out;
maxiocount = 1*1024*1024*1024;
error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTREAD, (caddr_t) &count);
if (error)
count = 0;
count *= blksize;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBLOCKCOUNTWRITE, (caddr_t) &count);
if (error)
count = 0;
count *= blksize;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTREAD, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXBYTECOUNTWRITE, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTREAD, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
error = do_ioctl(p1, p2, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, (caddr_t) &count);
if (error)
count = 0;
if (count && (count < maxiocount))
maxiocount = count;
kprintf("max io 0x%qx bytes\n", maxiocount);
if (maxiocount_result)
*maxiocount_result = maxiocount;
error = do_ioctl(p1, p2, DKIOCISSOLIDSTATE, (caddr_t)&isssd);
if (!error && isssd)
flags |= kIOHibernateOptionSSD;
if (partition_device_result)
*partition_device_result = device;
if (image_device_result)
*image_device_result = target;
if (flags)
*oflags = flags;
out:
kprintf("kern_open_file_for_direct_io(%d)\n", error);
if (error && locked)
{
p1 = &device;
(void) do_ioctl(p1, p2, DKIOCUNLOCKPHYSICALEXTENTS, NULL);
}
if (error && ref)
{
if (ref->vp)
{
vnode_close(ref->vp, FWRITE, ref->ctx);
ref->vp = NULLVP;
}
vfs_context_rele(ref->ctx);
kfree(ref, sizeof(struct kern_direct_file_io_ref_t));
ref = NULL;
}
return(ref);
}
/*
* shared_region_map_np()
*
* This system call is intended for dyld.
*
* dyld uses this to map a shared cache file into a shared region.
* This is usually done only the first time a shared cache is needed.
* Subsequent processes will just use the populated shared region without
* requiring any further setup.
*/
int
shared_region_map_np(
struct proc *p,
struct shared_region_map_np_args *uap,
__unused int *retvalp)
{
int error;
kern_return_t kr;
int fd;
struct fileproc *fp;
struct vnode *vp, *root_vp;
struct vnode_attr va;
off_t fs;
memory_object_size_t file_size;
user_addr_t user_mappings;
struct shared_file_mapping_np *mappings;
#define SFM_MAX_STACK 8
struct shared_file_mapping_np stack_mappings[SFM_MAX_STACK];
unsigned int mappings_count;
vm_size_t mappings_size;
memory_object_control_t file_control;
struct vm_shared_region *shared_region;
SHARED_REGION_TRACE_DEBUG(
("shared_region: %p [%d(%s)] -> map\n",
current_thread(), p->p_pid, p->p_comm));
shared_region = NULL;
mappings_count = 0;
mappings_size = 0;
mappings = NULL;
fp = NULL;
vp = NULL;
/* get file descriptor for shared region cache file */
fd = uap->fd;
/* get file structure from file descriptor */
error = fp_lookup(p, fd, &fp, 0);
if (error) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map: "
"fd=%d lookup failed (error=%d)\n",
current_thread(), p->p_pid, p->p_comm, fd, error));
goto done;
}
/* make sure we're attempting to map a vnode */
if (fp->f_fglob->fg_type != DTYPE_VNODE) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map: "
"fd=%d not a vnode (type=%d)\n",
current_thread(), p->p_pid, p->p_comm,
fd, fp->f_fglob->fg_type));
error = EINVAL;
goto done;
}
/* we need at least read permission on the file */
if (! (fp->f_fglob->fg_flag & FREAD)) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map: "
"fd=%d not readable\n",
current_thread(), p->p_pid, p->p_comm, fd));
error = EPERM;
goto done;
}
/* get vnode from file structure */
error = vnode_getwithref((vnode_t) fp->f_fglob->fg_data);
if (error) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map: "
"fd=%d getwithref failed (error=%d)\n",
current_thread(), p->p_pid, p->p_comm, fd, error));
goto done;
}
vp = (struct vnode *) fp->f_fglob->fg_data;
/* make sure the vnode is a regular file */
if (vp->v_type != VREG) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"not a file (type=%d)\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, vp->v_type));
error = EINVAL;
goto done;
}
/* make sure vnode is on the process's root volume */
root_vp = p->p_fd->fd_rdir;
if (root_vp == NULL) {
root_vp = rootvnode;
}
if (vp->v_mount != root_vp->v_mount) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"not on process's root volume\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name));
error = EPERM;
goto done;
}
/* make sure vnode is owned by "root" */
VATTR_INIT(&va);
VATTR_WANTED(&va, va_uid);
error = vnode_getattr(vp, &va, vfs_context_current());
if (error) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"vnode_getattr(%p) failed (error=%d)\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, vp, error));
goto done;
}
if (va.va_uid != 0) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"owned by uid=%d instead of 0\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, va.va_uid));
error = EPERM;
goto done;
}
/* get vnode size */
error = vnode_size(vp, &fs, vfs_context_current());
if (error) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"vnode_size(%p) failed (error=%d)\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, vp, error));
goto done;
}
file_size = fs;
/* get the file's memory object handle */
file_control = ubc_getobject(vp, UBC_HOLDOBJECT);
if (file_control == MEMORY_OBJECT_CONTROL_NULL) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"no memory object\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name));
error = EINVAL;
goto done;
}
/* get the list of mappings the caller wants us to establish */
mappings_count = uap->count; /* number of mappings */
mappings_size = (vm_size_t) (mappings_count * sizeof (mappings[0]));
if (mappings_count == 0) {
SHARED_REGION_TRACE_INFO(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"no mappings\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name));
error = 0; /* no mappings: we're done ! */
goto done;
} else if (mappings_count <= SFM_MAX_STACK) {
mappings = &stack_mappings[0];
} else {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"too many mappings (%d)\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, mappings_count));
error = EINVAL;
goto done;
}
user_mappings = uap->mappings; /* the mappings, in user space */
error = copyin(user_mappings,
mappings,
mappings_size);
if (error) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"copyin(0x%llx, %d) failed (error=%d)\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, (uint64_t)user_mappings, mappings_count, error));
goto done;
}
/* get the process's shared region (setup in vm_map_exec()) */
shared_region = vm_shared_region_get(current_task());
if (shared_region == NULL) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"no shared region\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name));
goto done;
}
/* map the file into that shared region's submap */
kr = vm_shared_region_map_file(shared_region,
mappings_count,
mappings,
file_control,
file_size,
(void *) p->p_fd->fd_rdir);
if (kr != KERN_SUCCESS) {
SHARED_REGION_TRACE_ERROR(
("shared_region: %p [%d(%s)] map(%p:'%s'): "
"vm_shared_region_map_file() failed kr=0x%x\n",
current_thread(), p->p_pid, p->p_comm,
vp, vp->v_name, kr));
switch (kr) {
case KERN_INVALID_ADDRESS:
error = EFAULT;
break;
case KERN_PROTECTION_FAILURE:
error = EPERM;
break;
case KERN_NO_SPACE:
error = ENOMEM;
break;
case KERN_FAILURE:
case KERN_INVALID_ARGUMENT:
default:
error = EINVAL;
break;
}
goto done;
}
/*
* The mapping was successful. Let the buffer cache know
* that we've mapped that file with these protections. This
* prevents the vnode from getting recycled while it's mapped.
*/
(void) ubc_map(vp, VM_PROT_READ);
error = 0;
/* update the vnode's access time */
if (! (vnode_vfsvisflags(vp) & MNT_NOATIME)) {
VATTR_INIT(&va);
nanotime(&va.va_access_time);
VATTR_SET_ACTIVE(&va, va_access_time);
vnode_setattr(vp, &va, vfs_context_current());
}
if (p->p_flag & P_NOSHLIB) {
/* signal that this process is now using split libraries */
OSBitAndAtomic(~((uint32_t)P_NOSHLIB), (UInt32 *)&p->p_flag);
}
done:
if (vp != NULL) {
/*
* release the vnode...
* ubc_map() still holds it for us in the non-error case
*/
(void) vnode_put(vp);
vp = NULL;
}
if (fp != NULL) {
/* release the file descriptor */
fp_drop(p, fd, fp, 0);
fp = NULL;
}
if (shared_region != NULL) {
vm_shared_region_deallocate(shared_region);
}
SHARED_REGION_TRACE_DEBUG(
("shared_region: %p [%d(%s)] <- map\n",
current_thread(), p->p_pid, p->p_comm));
return error;
}
IOReturn FileNVRAM::read_buffer(char** aBuffer, uint64_t* aLength, vfs_context_t aCtx)
{
IOReturn error = 0;
struct vnode * vp;
struct vnode_attr va;
if (aCtx)
{
if ((error = vnode_open(FILE_NVRAM_PATH, (O_RDONLY | FREAD | O_NOFOLLOW), S_IRUSR, VNODE_LOOKUP_NOFOLLOW, &vp, aCtx)))
{
printf("failed opening vnode at path %s, errno %d\n", FILE_NVRAM_PATH, error);
return error;
}
else
{
if ((error = vnode_isreg(vp)) == VREG)
{
VATTR_INIT(&va);
VATTR_WANTED(&va, va_data_size); /* size in bytes of the fork managed by current vnode */
// Determine size of vnode
if ((error = vnode_getattr(vp, &va, aCtx)))
{
printf("FileNVRAM.kext: Error, failed to determine file size of %s, errno %d.\n", FILE_NVRAM_PATH, error);
}
else
{
if (aLength)
{
*aLength = va.va_data_size;
}
*aBuffer = (char *)IOMalloc((size_t)va.va_data_size);
int len = (int)va.va_data_size;
if ((error = vn_rdwr(UIO_READ, vp, *aBuffer, len, 0, UIO_SYSSPACE, IO_NOCACHE|IO_NODELOCKED|IO_UNIT, vfs_context_ucred(aCtx), (int *) 0, vfs_context_proc(aCtx))))
{
printf("FileNVRAM.kext: Error, writing to vnode(%s) failed with error %d!\n", FILE_NVRAM_PATH, error);
}
}
if ((error = vnode_close(vp, 0, aCtx)))
{
printf("FileNVRAM.kext: Error, vnode_close(%s) failed with error %d!\n", FILE_NVRAM_PATH, error);
}
}
else
{
printf("FileNVRAM.kext: Error, vnode_isreg(%s) failed with error %d!\n", FILE_NVRAM_PATH, error);
}
}
}
else
{
printf("FileNVRAM.kext: aCtx == NULL!\n");
error = 0xFFFF; // EINVAL;
}
return error;
}
/* question: does afs_create need to set CDirty in the adp or the avc?
* I think we can get away without it, but I'm not sure. Note that
* afs_setattr is called in here for truncation.
*/
#ifdef AFS_SGI64_ENV
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs, int flags,
int amode, struct vcache **avcp, afs_ucred_t *acred)
#else /* AFS_SGI64_ENV */
int
afs_create(OSI_VC_DECL(adp), char *aname, struct vattr *attrs,
enum vcexcl aexcl, int amode, struct vcache **avcp,
afs_ucred_t *acred)
#endif /* AFS_SGI64_ENV */
{
afs_int32 origCBs, origZaps, finalZaps;
struct vrequest *treq = NULL;
afs_int32 code;
struct afs_conn *tc;
struct VenusFid newFid;
struct AFSStoreStatus InStatus;
struct AFSFetchStatus *OutFidStatus, *OutDirStatus;
struct AFSVolSync tsync;
struct AFSCallBack CallBack;
afs_int32 now;
struct dcache *tdc;
afs_size_t offset, len;
struct server *hostp = 0;
struct vcache *tvc;
struct volume *volp = 0;
struct afs_fakestat_state fakestate;
struct rx_connection *rxconn;
XSTATS_DECLS;
OSI_VC_CONVERT(adp);
AFS_STATCNT(afs_create);
OutFidStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
OutDirStatus = osi_AllocSmallSpace(sizeof(struct AFSFetchStatus));
memset(&InStatus, 0, sizeof(InStatus));
if ((code = afs_CreateReq(&treq, acred)))
goto done2;
afs_Trace3(afs_iclSetp, CM_TRACE_CREATE, ICL_TYPE_POINTER, adp,
ICL_TYPE_STRING, aname, ICL_TYPE_INT32, amode);
afs_InitFakeStat(&fakestate);
#ifdef AFS_SGI65_ENV
/* If avcp is passed not null, it's the old reference to this file.
* We can use this to avoid create races. For now, just decrement
* the reference count on it.
*/
if (*avcp) {
AFS_RELE(AFSTOV(*avcp));
*avcp = NULL;
}
#endif
if (strlen(aname) > AFSNAMEMAX) {
code = ENAMETOOLONG;
goto done3;
}
if (!afs_ENameOK(aname)) {
code = EINVAL;
goto done3;
}
switch (attrs->va_type) {
case VBLK:
case VCHR:
#if !defined(AFS_SUN5_ENV)
case VSOCK:
#endif
case VFIFO:
/* We don't support special devices or FIFOs */
code = EINVAL;
goto done3;
default:
;
}
AFS_DISCON_LOCK();
code = afs_EvalFakeStat(&adp, &fakestate, treq);
if (code)
goto done;
tagain:
code = afs_VerifyVCache(adp, treq);
if (code)
goto done;
/** If the volume is read-only, return error without making an RPC to the
* fileserver
*/
if (adp->f.states & CRO) {
code = EROFS;
goto done;
}
if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
code = ENETDOWN;
goto done;
}
tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1);
ObtainWriteLock(&adp->lock, 135);
if (tdc)
ObtainSharedLock(&tdc->lock, 630);
/*
* Make sure that the data in the cache is current. We may have
* received a callback while we were waiting for the write lock.
*/
if (!(adp->f.states & CStatd)
|| (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto tagain;
}
if (tdc) {
/* see if file already exists. If it does, we only set
* the size attributes (to handle O_TRUNC) */
code = afs_dir_Lookup(tdc, aname, &newFid.Fid); /* use dnlc first xxx */
if (code == 0) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
ReleaseWriteLock(&adp->lock);
#ifdef AFS_SGI64_ENV
if (flags & VEXCL) {
#else
if (aexcl != NONEXCL) {
#endif
code = EEXIST; /* file exists in excl mode open */
goto done;
}
/* found the file, so use it */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
tvc = NULL;
if (newFid.Fid.Unique == 0) {
tvc = afs_LookupVCache(&newFid, treq, NULL, adp, aname);
}
if (!tvc) /* lookup failed or wasn't called */
tvc = afs_GetVCache(&newFid, treq, NULL, NULL);
if (tvc) {
/* if the thing exists, we need the right access to open it.
* we must check that here, since no other checks are
* made by the open system call */
len = attrs->va_size; /* only do the truncate */
/*
* We used to check always for READ access before; the
* problem is that we will fail if the existing file
* has mode -w-w-w, which is wrong.
*/
if ((amode & VREAD)
&& !afs_AccessOK(tvc, PRSFS_READ, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
#if defined(AFS_DARWIN80_ENV)
if ((amode & VWRITE) || VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if ((amode & VWRITE) || (attrs->va_mask & AT_SIZE))
#else
if ((amode & VWRITE) || len != 0xffffffff)
#endif
{
/* needed for write access check */
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
/* need write mode for these guys */
if (!afs_AccessOK
(tvc, PRSFS_WRITE, treq, CHECK_MODE_BITS)) {
afs_PutVCache(tvc);
code = EACCES;
goto done;
}
}
#if defined(AFS_DARWIN80_ENV)
if (VATTR_IS_ACTIVE(attrs, va_data_size))
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_SIZE)
#else
if (len != 0xffffffff)
#endif
{
if (vType(tvc) != VREG) {
afs_PutVCache(tvc);
code = EISDIR;
goto done;
}
/* do a truncate */
#if defined(AFS_DARWIN80_ENV)
VATTR_INIT(attrs);
VATTR_SET_SUPPORTED(attrs, va_data_size);
VATTR_SET_ACTIVE(attrs, va_data_size);
#elif defined(UKERNEL)
attrs->va_mask = ATTR_SIZE;
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
attrs->va_mask = AT_SIZE;
#else
VATTR_NULL(attrs);
#endif
attrs->va_size = len;
ObtainWriteLock(&tvc->lock, 136);
tvc->f.states |= CCreating;
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
#if defined(AFS_SGI64_ENV)
code =
afs_setattr(VNODE_TO_FIRST_BHV((vnode_t *) tvc),
attrs, 0, acred);
#else
code = afs_setattr(tvc, attrs, 0, acred);
#endif /* AFS_SGI64_ENV */
#else /* SUN5 || SGI */
code = afs_setattr(tvc, attrs, acred);
#endif /* SUN5 || SGI */
ObtainWriteLock(&tvc->lock, 137);
tvc->f.states &= ~CCreating;
ReleaseWriteLock(&tvc->lock);
if (code) {
afs_PutVCache(tvc);
goto done;
}
}
*avcp = tvc;
} else
code = ENOENT; /* shouldn't get here */
/* make sure vrefCount bumped only if code == 0 */
goto done;
}
}
/* if we create the file, we don't do any access checks, since
* that's how O_CREAT is supposed to work */
if (adp->f.states & CForeign) {
origCBs = afs_allCBs;
origZaps = afs_allZaps;
} else {
origCBs = afs_evenCBs; /* if changes, we don't really have a callback */
origZaps = afs_evenZaps; /* number of even numbered vnodes discarded */
}
InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
InStatus.ClientModTime = osi_Time();
InStatus.Group = (afs_int32) afs_cr_gid(acred);
if (AFS_NFSXLATORREQ(acred)) {
/*
* XXX The following is mainly used to fix a bug in the HP-UX
* nfs client where they create files with mode of 0 without
* doing any setattr later on to fix it. * XXX
*/
#if defined(AFS_AIX_ENV)
if (attrs->va_mode != -1) {
#else
#if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
if (attrs->va_mask & AT_MODE) {
#else
if (attrs->va_mode != ((unsigned short)-1)) {
#endif
#endif
if (!attrs->va_mode)
attrs->va_mode = 0x1b6; /* XXX default mode: rw-rw-rw XXX */
}
}
if (!AFS_IS_DISCONNECTED) {
/* If not disconnected, connect to the server.*/
InStatus.UnixModeBits = attrs->va_mode & 0xffff; /* only care about protection bits */
do {
tc = afs_Conn(&adp->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
hostp = tc->srvr->server; /* remember for callback processing */
now = osi_Time();
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_CREATEFILE);
RX_AFS_GUNLOCK();
code =
RXAFS_CreateFile(rxconn, (struct AFSFid *)&adp->f.fid.Fid,
aname, &InStatus, (struct AFSFid *)
&newFid.Fid, OutFidStatus, OutDirStatus,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
CallBack.ExpirationTime += now;
} else
code = -1;
} while (afs_Analyze
(tc, rxconn, code, &adp->f.fid, treq, AFS_STATS_FS_RPCIDX_CREATEFILE,
SHARED_LOCK, NULL));
if ((code == EEXIST || code == UAEEXIST) &&
#ifdef AFS_SGI64_ENV
!(flags & VEXCL)
#else /* AFS_SGI64_ENV */
aexcl == NONEXCL
#endif
) {
/* if we get an EEXIST in nonexcl mode, just do a lookup */
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
ReleaseWriteLock(&adp->lock);
#if defined(AFS_SGI64_ENV)
code = afs_lookup(VNODE_TO_FIRST_BHV((vnode_t *) adp), aname, avcp,
NULL, 0, NULL, acred);
#elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
code = afs_lookup(adp, aname, avcp, NULL, 0, NULL, acred);
#elif defined(UKERNEL)
code = afs_lookup(adp, aname, avcp, acred, 0);
#elif !defined(AFS_DARWIN_ENV)
code = afs_lookup(adp, aname, avcp, acred);
#endif
goto done;
}
if (code) {
if (code < 0) {
ObtainWriteLock(&afs_xcbhash, 488);
afs_DequeueCallback(adp);
adp->f.states &= ~CStatd;
ReleaseWriteLock(&afs_xcbhash);
osi_dnlc_purgedp(adp);
}
ReleaseWriteLock(&adp->lock);
if (tdc) {
ReleaseSharedLock(&tdc->lock);
afs_PutDCache(tdc);
}
goto done;
}
} else {
/* Generate a fake FID for disconnected mode. */
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
afs_GenFakeFid(&newFid, VREG, 1);
} /* if (!AFS_IS_DISCON_RW) */
/* otherwise, we should see if we can make the change to the dir locally */
if (tdc)
UpgradeSToWLock(&tdc->lock, 631);
if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, OutDirStatus, 1)) {
/* we can do it locally */
ObtainWriteLock(&afs_xdcache, 291);
code = afs_dir_Create(tdc, aname, &newFid.Fid);
ReleaseWriteLock(&afs_xdcache);
if (code) {
ZapDCE(tdc);
DZap(tdc);
}
}
if (tdc) {
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
}
if (AFS_IS_DISCON_RW)
adp->f.m.LinkCount++;
newFid.Cell = adp->f.fid.Cell;
newFid.Fid.Volume = adp->f.fid.Fid.Volume;
ReleaseWriteLock(&adp->lock);
volp = afs_FindVolume(&newFid, READ_LOCK);
/* New tricky optimistic callback handling algorithm for file creation works
* as follows. We create the file essentially with no locks set at all. File
* server may thus handle operations from others cache managers as well as from
* this very own cache manager that reference the file in question before
* we managed to create the cache entry. However, if anyone else changes
* any of the status information for a file, we'll see afs_evenCBs increase
* (files always have even fids). If someone on this workstation manages
* to do something to the file, they'll end up having to create a cache
* entry for the new file. Either we'll find it once we've got the afs_xvcache
* lock set, or it was also *deleted* the vnode before we got there, in which case
* we will find evenZaps has changed, too. Thus, we only assume we have the right
* status information if no callbacks or vnode removals have occurred to even
* numbered files from the time the call started until the time that we got the xvcache
* lock set. Of course, this also assumes that any call that modifies a file first
* gets a write lock on the file's vnode, but if that weren't true, the whole cache manager
* would fail, since no call would be able to update the local vnode status after modifying
* a file on a file server. */
ObtainWriteLock(&afs_xvcache, 138);
if (adp->f.states & CForeign)
finalZaps = afs_allZaps; /* do this before calling newvcache */
else
finalZaps = afs_evenZaps; /* do this before calling newvcache */
/* don't need to call RemoveVCB, since only path leaving a callback is the
* one where we pass through afs_NewVCache. Can't have queued a VCB unless
* we created and freed an entry between file creation time and here, and the
* freeing of the vnode will change evenZaps. Don't need to update the VLRU
* queue, since the find will only succeed in the event of a create race, and
* then the vcache will be at the front of the VLRU queue anyway... */
if (!(tvc = afs_FindVCache(&newFid, 0, DO_STATS))) {
tvc = afs_NewVCache(&newFid, hostp);
if (tvc) {
int finalCBs;
ObtainWriteLock(&tvc->lock, 139);
ObtainWriteLock(&afs_xcbhash, 489);
finalCBs = afs_evenCBs;
/* add the callback in */
if (adp->f.states & CForeign) {
tvc->f.states |= CForeign;
finalCBs = afs_allCBs;
}
if (origCBs == finalCBs && origZaps == finalZaps) {
tvc->f.states |= CStatd; /* we've fake entire thing, so don't stat */
tvc->f.states &= ~CBulkFetching;
if (!AFS_IS_DISCON_RW) {
tvc->cbExpires = CallBack.ExpirationTime;
afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), volp);
}
} else {
afs_DequeueCallback(tvc);
tvc->f.states &= ~(CStatd | CUnique);
tvc->callback = 0;
if (tvc->f.fid.Fid.Vnode & 1 || (vType(tvc) == VDIR))
osi_dnlc_purgedp(tvc);
}
ReleaseWriteLock(&afs_xcbhash);
if (AFS_IS_DISCON_RW) {
afs_DisconAddDirty(tvc, VDisconCreate, 0);
afs_GenDisconStatus(adp, tvc, &newFid, attrs, treq, VREG);
} else {
afs_ProcessFS(tvc, OutFidStatus, treq);
}
tvc->f.parent.vnode = adp->f.fid.Fid.Vnode;
tvc->f.parent.unique = adp->f.fid.Fid.Unique;
#if !defined(UKERNEL)
if (volp && (volp->states & VPartVisible))
tvc->f.states |= CPartVisible;
#endif
ReleaseWriteLock(&tvc->lock);
*avcp = tvc;
code = 0;
} else
code = ENOENT;
} else {
/* otherwise cache entry already exists, someone else must
* have created it. Comments used to say: "don't need write
* lock to *clear* these flags" but we should do it anyway.
* Code used to clear stat bit and callback, but I don't see
* the point -- we didn't have a create race, somebody else just
* snuck into NewVCache before we got here, probably a racing
* lookup.
*/
*avcp = tvc;
code = 0;
}
ReleaseWriteLock(&afs_xvcache);
done:
AFS_DISCON_UNLOCK();
done3:
if (volp)
afs_PutVolume(volp, READ_LOCK);
if (code == 0) {
if (afs_mariner)
afs_AddMarinerName(aname, *avcp);
/* return the new status in vattr */
afs_CopyOutAttrs(*avcp, attrs);
if (afs_mariner)
afs_MarinerLog("store$Creating", *avcp);
}
afs_PutFakeStat(&fakestate);
code = afs_CheckCode(code, treq, 20);
afs_DestroyReq(treq);
done2:
osi_FreeSmallSpace(OutFidStatus);
osi_FreeSmallSpace(OutDirStatus);
return code;
}
/*
* Check to see if we can track the change locally: requires that
* we have sufficiently recent info in data cache. If so, we
* know the new DataVersion number, and place it correctly in both the
* data and stat cache entries. This routine returns 1 if we should
* do the operation locally, and 0 otherwise.
*
* This routine must be called with the stat cache entry write-locked,
* and dcache entry write-locked.
*/
int
afs_LocalHero(struct vcache *avc, struct dcache *adc,
AFSFetchStatus * astat, int aincr)
{
afs_int32 ok;
afs_hyper_t avers;
AFS_STATCNT(afs_LocalHero);
hset64(avers, astat->dataVersionHigh, astat->DataVersion);
/* avers *is* the version number now, no matter what */
if (adc) {
/* does what's in the dcache *now* match what's in the vcache *now*,
* and do we have a valid callback? if not, our local copy is not "ok" */
ok = (hsame(avc->f.m.DataVersion, adc->f.versionNo) && avc->callback
&& (avc->f.states & CStatd) && avc->cbExpires >= osi_Time());
} else {
ok = 0;
}
if (ok) {
/* check that the DV on the server is what we expect it to be */
afs_hyper_t newDV;
hset(newDV, adc->f.versionNo);
hadd32(newDV, aincr);
if (!hsame(avers, newDV)) {
ok = 0;
}
}
#if defined(AFS_SGI_ENV)
osi_Assert(avc->v.v_type == VDIR);
#endif
/* The bulk status code used the length as a sequence number. */
/* Don't update the vcache entry unless the stats are current. */
if (avc->f.states & CStatd) {
hset(avc->f.m.DataVersion, avers);
#ifdef AFS_64BIT_CLIENT
FillInt64(avc->f.m.Length, astat->Length_hi, astat->Length);
#else /* AFS_64BIT_CLIENT */
avc->f.m.Length = astat->Length;
#endif /* AFS_64BIT_CLIENT */
avc->f.m.Date = astat->ClientModTime;
}
if (ok) {
/* we've been tracking things correctly */
adc->dflags |= DFEntryMod;
adc->f.versionNo = avers;
return 1;
} else {
if (adc) {
ZapDCE(adc);
DZap(adc);
}
if (avc->f.states & CStatd) {
osi_dnlc_purgedp(avc);
}
return 0;
}
}
static int
vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t *ashift)
{
vdev_file_t *vf;
#ifdef __APPLE__
struct vnode *vp, *rootdir;
struct vnode_attr vattr;
vfs_context_t context;
#else
vnode_t *vp;
vattr_t vattr;
#endif
int error;
/*
* We must have a pathname, and it must be absolute.
*/
if (vd->vdev_path == NULL || vd->vdev_path[0] != '/') {
vd->vdev_stat.vs_aux = VDEV_AUX_BAD_LABEL;
return (EINVAL);
}
vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
/*
* We always open the files from the root of the global zone, even if
* we're in a local zone. If the user has gotten to this point, the
* administrator has already decided that the pool should be available
* to local zone users, so the underlying devices should be as well.
*/
ASSERT(vd->vdev_path != NULL && vd->vdev_path[0] == '/');
#ifdef __APPLE__
rootdir = getrootdir();
#endif
error = vn_openat(vd->vdev_path + 1, UIO_SYSSPACE, spa_mode | FOFFMAX,
0, &vp, 0, 0, rootdir);
if (error) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (error);
}
vf->vf_vnode = vp;
#ifdef _KERNEL
/*
* Make sure it's a regular file.
*/
#ifdef __APPLE__
if (!vnode_isreg(vp)) {
#else
if (vp->v_type != VREG) {
#endif
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (ENODEV);
}
#endif
/*
* Determine the physical size of the file.
*/
#ifdef __APPLE__
VATTR_INIT(&vattr);
VATTR_WANTED(&vattr, va_data_size);
context = vfs_context_create((vfs_context_t)0);
error = vnode_getattr(vp, &vattr, context);
(void) vfs_context_rele(context);
if (error || !VATTR_IS_SUPPORTED(&vattr, va_data_size)) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (error);
}
*psize = vattr.va_data_size;
#else
vattr.va_mask = AT_SIZE;
error = VOP_GETATTR(vp, &vattr, 0, kcred);
if (error) {
vd->vdev_stat.vs_aux = VDEV_AUX_OPEN_FAILED;
return (error);
}
*psize = vattr.va_size;
#endif
*ashift = SPA_MINBLOCKSHIFT;
return (0);
}
static void
vdev_file_close(vdev_t *vd)
{
vdev_file_t *vf = vd->vdev_tsd;
if (vf == NULL)
return;
if (vf->vf_vnode != NULL) {
#ifdef __APPLE__
vfs_context_t context;
context = vfs_context_create((vfs_context_t)0);
/* ### APPLE TODO #### */
// (void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred);
(void) vnode_close(vf->vf_vnode, spa_mode, context);
(void) vfs_context_rele(context);
#else
(void) VOP_PUTPAGE(vf->vf_vnode, 0, 0, B_INVAL, kcred);
(void) VOP_CLOSE(vf->vf_vnode, spa_mode, 1, 0, kcred);
VN_RELE(vf->vf_vnode);
#endif
}
kmem_free(vf, sizeof (vdev_file_t));
vd->vdev_tsd = NULL;
}
