#include <bsm/audit_kevents.h>
#include <pexpert/pexpert.h>
+#include <libkern/section_keywords.h>
typedef struct kfs_event {
LIST_ENTRY(kfs_event) kevent_list;
#define WATCHER_CLOSING 0x0002
#define WATCHER_WANTS_COMPACT_EVENTS 0x0004
#define WATCHER_WANTS_EXTENDED_INFO 0x0008
-#define WATCHER_APPLE_SYSTEM_SERVICE 0x0010 // fseventsd, coreservicesd, mds
+#define WATCHER_APPLE_SYSTEM_SERVICE 0x0010 // fseventsd, coreservicesd, mds, revisiond
#define MAX_WATCHERS 8
static fs_event_watcher *watcher_table[MAX_WATCHERS];
//
static int16_t fs_event_type_watchers[FSE_MAX_EVENTS];
+// the device currently being unmounted:
+static dev_t fsevent_unmount_dev = 0;
+// how many ACKs are still outstanding:
+static int fsevent_unmount_ack_count = 0;
+
static int watcher_add_event(fs_event_watcher *watcher, kfs_event *kfse);
static void fsevents_wakeup(fs_event_watcher *watcher);
// (as long as it's not an event type that can never be the
// same as a previous event)
//
- if (type != FSE_CREATE_FILE && type != FSE_DELETE && type != FSE_RENAME && type != FSE_EXCHANGE && type != FSE_CHOWN && type != FSE_DOCID_CHANGED && type != FSE_DOCID_CREATED) {
+ if (type != FSE_CREATE_FILE && type != FSE_DELETE && type != FSE_RENAME && type != FSE_EXCHANGE && type != FSE_CHOWN && type != FSE_DOCID_CHANGED && type != FSE_DOCID_CREATED && type != FSE_CLONE) {
void *ptr=NULL;
int vid=0, was_str=0, nlen=0;
kfse = zalloc_noblock(event_zone);
- if (kfse && (type == FSE_RENAME || type == FSE_EXCHANGE)) {
+ if (kfse && (type == FSE_RENAME || type == FSE_EXCHANGE || type == FSE_CLONE)) {
kfse_dest = zalloc_noblock(event_zone);
if (kfse_dest == NULL) {
did_alloc = 1;
kfse->type = type;
kfse->abstime = now;
kfse->pid = p->p_pid;
- if (type == FSE_RENAME || type == FSE_EXCHANGE) {
+ if (type == FSE_RENAME || type == FSE_EXCHANGE || type == FSE_CLONE) {
memset(kfse_dest, 0, sizeof(kfs_event));
kfse_dest->refcount = 1;
OSBitOrAtomic16(KFSE_BEING_CREATED, &kfse_dest->flags);
goto done_with_args;
}
+ if (type == FSE_UNMOUNT_PENDING) {
+
+ // Just a dev_t
+ arg_type = va_arg(ap, int32_t);
+ if (arg_type == FSE_ARG_DEV) {
+ cur->dev = (dev_t)(va_arg(ap, dev_t));
+ } else {
+ cur->dev = (dev_t)0xbadc0de1;
+ }
+
+ goto done_with_args;
+ }
+
for(arg_type=va_arg(ap, int32_t); arg_type != FSE_ARG_DONE; arg_type=va_arg(ap, int32_t))
switch(arg_type) {
// holding the fs_event_buf lock
//
copy = *kfse;
- if (kfse->dest && OSAddAtomic(-1, &kfse->dest->refcount) == 1) {
- dest_copy = *kfse->dest;
+ if (kfse->type != FSE_DOCID_CREATED && kfse->type != FSE_DOCID_CHANGED && kfse->dest && OSAddAtomic(-1, &kfse->dest->refcount) == 1) {
+ dest_copy = *kfse->dest;
} else {
dest_copy.str = NULL;
dest_copy.len = 0;
unlock_fs_event_list();
// if we have a pointer in the union
- if (copy.str && copy.type != FSE_DOCID_CHANGED) {
+ if (copy.str && copy.type != FSE_DOCID_CREATED && copy.type != FSE_DOCID_CHANGED) {
if (copy.len == 0) { // and it's not a string
panic("%s:%d: no more fref.vp!\n", __FILE__, __LINE__);
// vnode_rele_ext(copy.fref.vp, O_EVTONLY, 0);
if (!strncmp(watcher->proc_name, "fseventsd", sizeof(watcher->proc_name)) ||
!strncmp(watcher->proc_name, "coreservicesd", sizeof(watcher->proc_name)) ||
+ !strncmp(watcher->proc_name, "revisiond", sizeof(watcher->proc_name)) ||
!strncmp(watcher->proc_name, "mds", sizeof(watcher->proc_name))) {
watcher->flags |= WATCHER_APPLE_SYSTEM_SERVICE;
} else {
return 0;
}
- if (kfse->type == FSE_RENAME && kfse->dest == NULL) {
+ if (((kfse->type == FSE_RENAME) || (kfse->type == FSE_CLONE)) && kfse->dest == NULL) {
//
// This can happen if an event gets recycled but we had a
// pointer to it in our event queue. The event is the
- // destination of a rename which we'll process separately
+ // destination of a rename or clone which we'll process separately
// (that is, another kfse points to this one so it's ok
// to skip this guy because we'll process it when we process
// the other one)
if (kfse->type == FSE_DOCID_CHANGED || kfse->type == FSE_DOCID_CREATED) {
dev_t dev = cur->dev;
- ino_t ino = cur->ino;
+ ino64_t ino = cur->ino;
uint64_t ival;
error = fill_buff(FSE_ARG_DEV, sizeof(dev_t), &dev, evbuff, &evbuff_idx, sizeof(evbuff), uio);
goto get_out;
}
- error = fill_buff(FSE_ARG_INO, sizeof(ino_t), &ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
+ error = fill_buff(FSE_ARG_INO, sizeof(ino64_t), &ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
if (error != 0) {
goto get_out;
}
- memcpy(&ino, &cur->str, sizeof(ino_t));
- error = fill_buff(FSE_ARG_INO, sizeof(ino_t), &ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
+ memcpy(&ino, &cur->str, sizeof(ino64_t));
+ error = fill_buff(FSE_ARG_INO, sizeof(ino64_t), &ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
if (error != 0) {
goto get_out;
}
goto done;
}
+ if (kfse->type == FSE_UNMOUNT_PENDING) {
+ dev_t dev = cur->dev;
+
+ error = fill_buff(FSE_ARG_DEV, sizeof(dev_t), &dev, evbuff, &evbuff_idx, sizeof(evbuff), uio);
+ if (error != 0) {
+ goto get_out;
+ }
+
+ goto done;
+ }
+
if (cur->str == NULL || cur->str[0] == '\0') {
printf("copy_out_kfse:2: empty/short path (%s)\n", cur->str);
error = fill_buff(FSE_ARG_STRING, 2, "/", evbuff, &evbuff_idx, sizeof(evbuff), uio);
goto get_out;
}
} else {
- ino_t ino;
-
error = fill_buff(FSE_ARG_DEV, sizeof(dev_t), &cur->dev, evbuff, &evbuff_idx, sizeof(evbuff), uio);
if (error != 0) {
goto get_out;
}
- ino = (ino_t)cur->ino;
- error = fill_buff(FSE_ARG_INO, sizeof(ino_t), &ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
+ error = fill_buff(FSE_ARG_INO, sizeof(ino64_t), &cur->ino, evbuff, &evbuff_idx, sizeof(evbuff), uio);
if (error != 0) {
goto get_out;
}
if (watcher->event_list[kfse->type] == FSE_REPORT && watcher_cares_about_dev(watcher, kfse->dev)) {
- if (!(watcher->flags & WATCHER_APPLE_SYSTEM_SERVICE) && kfse->type != FSE_DOCID_CHANGED && is_ignored_directory(kfse->str)) {
+ if (!(watcher->flags & WATCHER_APPLE_SYSTEM_SERVICE) && kfse->type != FSE_DOCID_CREATED && kfse->type != FSE_DOCID_CHANGED && is_ignored_directory(kfse->str)) {
// If this is not an Apple System Service, skip specified directories
// radar://12034844
error = 0;
}
-// release any references we might have on vnodes which are
-// the mount point passed to us (so that it can be cleanly
-// unmounted).
//
-// since we don't want to lose the events we'll convert the
-// vnode refs to full paths.
+// Shoo watchers away from a volume that's about to be unmounted
+// (so that it can be cleanly unmounted).
//
void
-fsevent_unmount(__unused struct mount *mp)
+fsevent_unmount(__unused struct mount *mp, __unused vfs_context_t ctx)
{
- // we no longer maintain pointers to vnodes so
- // there is nothing to do...
+#if CONFIG_EMBEDDED
+ dev_t dev = mp->mnt_vfsstat.f_fsid.val[0];
+ int error, waitcount = 0;
+ struct timespec ts = {1, 0};
+
+ // wait for any other pending unmounts to complete
+ lock_watch_table();
+ while (fsevent_unmount_dev != 0) {
+ error = msleep((caddr_t)&fsevent_unmount_dev, &watch_table_lock, PRIBIO, "fsevent_unmount_wait", &ts);
+ if (error == EWOULDBLOCK)
+ error = 0;
+ if (!error && (++waitcount >= 10)) {
+ error = EWOULDBLOCK;
+ printf("timeout waiting to signal unmount pending for dev %d (fsevent_unmount_dev %d)\n", dev, fsevent_unmount_dev);
+ }
+ if (error) {
+ // there's a problem, bail out
+ unlock_watch_table();
+ return;
+ }
+ }
+ if (fs_event_type_watchers[FSE_UNMOUNT_PENDING] == 0) {
+ // nobody watching for unmount pending events
+ unlock_watch_table();
+ return;
+ }
+ // this is now the current unmount pending
+ fsevent_unmount_dev = dev;
+ fsevent_unmount_ack_count = fs_event_type_watchers[FSE_UNMOUNT_PENDING];
+ unlock_watch_table();
+
+ // send an event to notify the watcher they need to get off the mount
+ error = add_fsevent(FSE_UNMOUNT_PENDING, ctx, FSE_ARG_DEV, dev, FSE_ARG_DONE);
+
+ // wait for acknowledgment(s) (give up if it takes too long)
+ lock_watch_table();
+ waitcount = 0;
+ while (fsevent_unmount_dev == dev) {
+ error = msleep((caddr_t)&fsevent_unmount_dev, &watch_table_lock, PRIBIO, "fsevent_unmount_pending", &ts);
+ if (error == EWOULDBLOCK)
+ error = 0;
+ if (!error && (++waitcount >= 10)) {
+ error = EWOULDBLOCK;
+ printf("unmount pending ack timeout for dev %d\n", dev);
+ }
+ if (error) {
+ // there's a problem, bail out
+ if (fsevent_unmount_dev == dev) {
+ fsevent_unmount_dev = 0;
+ fsevent_unmount_ack_count = 0;
+ }
+ wakeup((caddr_t)&fsevent_unmount_dev);
+ break;
+ }
+ }
+ unlock_watch_table();
+#endif
}
new_num_devices = devfilt_args->num_devices;
if (new_num_devices == 0) {
- tmp = fseh->watcher->devices_not_to_watch;
-
lock_watch_table();
+
+ tmp = fseh->watcher->devices_not_to_watch;
fseh->watcher->devices_not_to_watch = NULL;
fseh->watcher->num_devices = new_num_devices;
- unlock_watch_table();
+ unlock_watch_table();
if (tmp) {
FREE(tmp, M_TEMP);
}
break;
}
+ case FSEVENTS_UNMOUNT_PENDING_ACK: {
+ lock_watch_table();
+ dev_t dev = *(dev_t *)data;
+ if (fsevent_unmount_dev == dev) {
+ if (--fsevent_unmount_ack_count <= 0) {
+ fsevent_unmount_dev = 0;
+ wakeup((caddr_t)&fsevent_unmount_dev);
+ }
+ } else {
+ printf("unexpected unmount pending ack %d (%d)\n", dev, fsevent_unmount_dev);
+ ret = EINVAL;
+ }
+ unlock_watch_table();
+ break;
+ }
+
default:
ret = EINVAL;
break;
switch(kn->kn_filter) {
case EVFILT_READ:
kn->kn_data = amt;
-
+
if (kn->kn_data != 0) {
activate = 1;
}
}
-struct filterops fsevent_filtops = {
- .f_isfd = 1,
- .f_attach = NULL,
- .f_detach = filt_fsevent_detach,
- .f_event = filt_fsevent
+static int
+filt_fsevent_touch(struct knote *kn, struct kevent_internal_s *kev)
+{
+ int res;
+
+ lock_watch_table();
+
+ /* accept new fflags/data as saved */
+ kn->kn_sfflags = kev->fflags;
+ kn->kn_sdata = kev->data;
+
+ /* restrict the current results to the (smaller?) set of new interest */
+ /*
+ * For compatibility with previous implementations, we leave kn_fflags
+ * as they were before.
+ */
+ //kn->kn_fflags &= kev->fflags;
+
+ /* determine if the filter is now fired */
+ res = filt_fsevent(kn, 0);
+
+ unlock_watch_table();
+
+ return res;
+}
+
+static int
+filt_fsevent_process(struct knote *kn, struct filt_process_s *data, struct kevent_internal_s *kev)
+{
+#pragma unused(data)
+ int res;
+
+ lock_watch_table();
+
+ res = filt_fsevent(kn, 0);
+ if (res) {
+ *kev = kn->kn_kevent;
+ if (kev->flags & EV_CLEAR) {
+ kn->kn_data = 0;
+ kn->kn_fflags = 0;
+ }
+ }
+
+ unlock_watch_table();
+ return res;
+}
+
+SECURITY_READ_ONLY_EARLY(struct filterops) fsevent_filtops = {
+ .f_isfd = 1,
+ .f_attach = NULL,
+ .f_detach = filt_fsevent_detach,
+ .f_event = filt_fsevent,
+ .f_touch = filt_fsevent_touch,
+ .f_process = filt_fsevent_process,
};
static int
-fseventsf_kqfilter(__unused struct fileproc *fp, __unused struct knote *kn, __unused vfs_context_t ctx)
+fseventsf_kqfilter(__unused struct fileproc *fp, __unused struct knote *kn,
+ __unused struct kevent_internal_s *kev, __unused vfs_context_t ctx)
{
fsevent_handle *fseh = (struct fsevent_handle *)fp->f_fglob->fg_data;
+ int res;
kn->kn_hook = (void*)fseh;
kn->kn_hookid = 1;
- kn->kn_fop = &fsevent_filtops;
-
+ kn->kn_filtid = EVFILTID_FSEVENT;
+
lock_watch_table();
KNOTE_ATTACH(&fseh->knotes, kn);
+ /* check to see if it is fired already */
+ res = filt_fsevent(kn, 0);
+
unlock_watch_table();
- return 0;
+
+ return res;
}
int counter = 0;
fsevent_handle *fseh = (struct fsevent_handle *)fp->f_fglob->fg_data;
- fseh->watcher->flags |= WATCHER_CLOSING;
-
// if there are people still waiting, sleep for 10ms to
// let them clean up and get out of there. however we
// also don't want to get stuck forever so if they don't
path_len = ptr - path;
- if (type != FSE_RENAME && type != FSE_EXCHANGE) {
+ if (type != FSE_RENAME && type != FSE_EXCHANGE && type != FSE_CLONE) {
event_start = ptr; // record where the next event starts
err = add_fsevent(type, ctx, FSE_ARG_STRING, path_len, path, FSE_ARG_FINFO, finfo, FSE_ARG_DONE);
static const struct fileops fsevents_fops = {
- DTYPE_FSEVENTS,
- fseventsf_read,
- fseventsf_write,
- fseventsf_ioctl,
- fseventsf_select,
- fseventsf_close,
- fseventsf_kqfilter,
- fseventsf_drain
+ .fo_type = DTYPE_FSEVENTS,
+ .fo_read = fseventsf_read,
+ .fo_write = fseventsf_write,
+ .fo_ioctl = fseventsf_ioctl,
+ .fo_select = fseventsf_select,
+ .fo_close = fseventsf_close,
+ .fo_kqfilter = fseventsf_kqfilter,
+ .fo_drain = fseventsf_drain,
};
typedef struct fsevent_clone_args32 {
}
#else /* CONFIG_FSE */
+
+#include <sys/fsevents.h>
+
/*
* The get_pathbuff and release_pathbuff routines are used in places not
* related to fsevents, and it's a handy abstraction, so define trivial
{
FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
}
+
+int
+add_fsevent(__unused int type, __unused vfs_context_t ctx, ...)
+{
+ return 0;
+}
+
+int need_fsevent(__unused int type, __unused vnode_t vp)
+{
+ return 0;
+}
+
#endif /* CONFIG_FSE */
projects / apple / xnu.git / blobdiff