static void irix_release_kernel_oplock(struct kernel_oplocks *_ctx,
files_struct *fsp, int oplock_type)
{
if (DEBUGLVL(10)) {
/*
* Check and print out the current kernel
* oplock state of this file.
*/
int state = sys_fcntl_long(fsp->fh->fd, F_OPLKACK, -1);
dbgtext("irix_release_kernel_oplock: file %s, file_id = %s"
"gen_id = %ul, has kernel oplock state "
"of %x.\n", fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id, state );
}
/*
* Remove the kernel oplock on this file.
*/
if(sys_fcntl_long(fsp->fh->fd, F_OPLKACK, OP_REVOKE) < 0) {
if( DEBUGLVL( 0 )) {
dbgtext("irix_release_kernel_oplock: Error when "
"removing kernel oplock on file " );
dbgtext("%s, file_id = %s gen_id = %ul. "
"Error was %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id,
strerror(errno) );
}
}
}
static void linux_release_kernel_oplock(struct kernel_oplocks *ctx,
files_struct *fsp, int oplock_type)
{
if (DEBUGLVL(10)) {
/*
* Check and print out the current kernel
* oplock state of this file.
*/
int state = fcntl(fsp->fh->fd, F_GETLEASE, 0);
dbgtext("linux_release_kernel_oplock: file %s, file_id = %s "
"gen_id = %lu has kernel oplock state "
"of %x.\n", fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id, state );
}
/*
* Remove the kernel oplock on this file.
*/
if ( SMB_VFS_LINUX_SETLEASE(fsp, F_UNLCK) == -1) {
if (DEBUGLVL(0)) {
dbgtext("linux_release_kernel_oplock: Error when "
"removing kernel oplock on file " );
dbgtext("%s, file_id = %s, gen_id = %lu. "
"Error was %s\n", fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id, strerror(errno) );
}
}
}
static bool irix_set_kernel_oplock(struct kernel_oplocks *_ctx,
files_struct *fsp, int oplock_type)
{
struct irix_oplocks_context *ctx = talloc_get_type(_ctx->private_data,
struct irix_oplocks_context);
if (sys_fcntl_long(fsp->fh->fd, F_OPLKREG, ctx->write_fd) == -1) {
if(errno != EAGAIN) {
DEBUG(0,("irix_set_kernel_oplock: Unable to get "
"kernel oplock on file %s, file_id %s "
"gen_id = %ul. Error was %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id,
strerror(errno) ));
} else {
DEBUG(5,("irix_set_kernel_oplock: Refused oplock on "
"file %s, fd = %d, file_id = %s, "
"gen_id = %ul. Another process had the file "
"open.\n",
fsp_str_dbg(fsp), fsp->fh->fd,
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id ));
}
return False;
}
DEBUG(10,("irix_set_kernel_oplock: got kernel oplock on file %s, file_id = %s "
"gen_id = %ul\n",
fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id));
return True;
}
/*
* Deal with a reply when a break-to-level II was sent.
*/
bool downgrade_oplock(files_struct *fsp)
{
bool ret;
struct share_mode_lock *lck;
DEBUG(10, ("downgrade_oplock called for %s\n",
fsp_str_dbg(fsp)));
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("downgrade_oplock: failed to lock share entry for "
"file %s\n", fsp_str_dbg(fsp)));
return False;
}
ret = downgrade_share_oplock(lck, fsp);
if (!ret) {
DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
"for file %s, %s, file_id %s\n",
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
downgrade_file_oplock(fsp);
ret = update_num_read_oplocks(fsp, lck);
if (!ret) {
DEBUG(0, ("%s: update_num_read_oplocks failed for "
"file %s, %s, %s\n",
__func__, fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
TALLOC_FREE(lck);
return ret;
}
static files_struct *initial_break_processing(
struct smbd_server_connection *sconn, struct file_id id,
unsigned long file_id)
{
files_struct *fsp = NULL;
DEBUG(3, ("initial_break_processing: called for %s/%u\n"
"Current oplocks_open (exclusive = %d, levelII = %d)\n",
file_id_string_tos(&id), (int)file_id,
sconn->oplocks.exclusive_open,
sconn->oplocks.level_II_open));
/*
* We need to search the file open table for the
* entry containing this dev and inode, and ensure
* we have an oplock on it.
*/
fsp = file_find_dif(sconn, id, file_id);
if(fsp == NULL) {
/* The file could have been closed in the meantime - return success. */
DEBUG(3, ("initial_break_processing: cannot find open file "
"with file_id %s gen_id = %lu, allowing break to "
"succeed.\n", file_id_string_tos(&id), file_id));
return NULL;
}
/* Ensure we have an oplock on the file */
/*
* There is a potential race condition in that an oplock could
* have been broken due to another udp request, and yet there are
* still oplock break messages being sent in the udp message
* queue for this file. So return true if we don't have an oplock,
* as we may have just freed it.
*/
if(fsp->oplock_type == NO_OPLOCK) {
DEBUG(3, ("initial_break_processing: file %s (file_id = %s "
"gen_id = %lu) has no oplock. Allowing break to "
"succeed regardless.\n", fsp_str_dbg(fsp),
file_id_string_tos(&id), fsp->fh->gen_id));
return NULL;
}
return fsp;
}
/*
* Deal with a reply when a break-to-level II was sent.
*/
bool downgrade_oplock(files_struct *fsp)
{
bool ret;
struct share_mode_lock *lck;
struct byte_range_lock *brl;
DEBUG(10, ("downgrade_oplock called for %s\n",
fsp_str_dbg(fsp)));
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("downgrade_oplock: failed to lock share entry for "
"file %s\n", fsp_str_dbg(fsp)));
return False;
}
ret = downgrade_share_oplock(lck, fsp);
if (!ret) {
DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
"for file %s, %s, file_id %s\n",
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
downgrade_file_oplock(fsp);
brl = brl_get_locks(talloc_tos(), fsp);
if (brl != NULL) {
brl_set_have_read_oplocks(brl, true);
TALLOC_FREE(brl);
}
TALLOC_FREE(lck);
return ret;
}
static void print_brl(struct file_id id,
struct server_id pid,
enum brl_type lock_type,
enum brl_flavour lock_flav,
br_off start,
br_off size,
void *private_data)
{
#if NASTY_POSIX_LOCK_HACK
{
static SMB_INO_T lastino;
if (lastino != ino) {
char *cmd;
if (asprintf(&cmd,
"egrep POSIX.*%u /proc/locks", (int)ino) > 0) {
system(cmd);
SAFE_FREE(cmd);
}
}
lastino = ino;
}
#endif
printf("%s %s %s %.0f:%.0f(%.0f)\n",
procid_str_static(&pid), file_id_string_tos(&id),
lock_type==READ_LOCK?"R":"W",
(double)start, (double)start+size-1,(double)size);
}
files_struct *file_find_dif(struct smbd_server_connection *sconn,
struct file_id id, unsigned long gen_id)
{
int count=0;
files_struct *fsp;
if (gen_id == 0) {
return NULL;
}
for (fsp=sconn->files; fsp; fsp=fsp->next,count++) {
/* We can have a fsp->fh->fd == -1 here as it could be a stat open. */
if (file_id_equal(&fsp->file_id, &id) &&
fsp->fh->gen_id == gen_id ) {
if (count > 10) {
DLIST_PROMOTE(sconn->files, fsp);
}
/* Paranoia check. */
if ((fsp->fh->fd == -1) &&
(fsp->oplock_type != NO_OPLOCK)) {
DEBUG(0,("file_find_dif: file %s file_id = "
"%s, gen = %u oplock_type = %u is a "
"stat open with oplock type !\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
(unsigned int)fsp->fh->gen_id,
(unsigned int)fsp->oplock_type ));
smb_panic("file_find_dif");
}
return fsp;
}
}
return NULL;
}
static void process_kernel_oplock_break(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id src,
DATA_BLOB *data)
{
struct file_id id;
unsigned long file_id;
files_struct *fsp;
struct smbd_server_connection *sconn =
talloc_get_type_abort(private_data,
struct smbd_server_connection);
if (data->data == NULL) {
DEBUG(0, ("Got NULL buffer\n"));
return;
}
if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
return;
}
/* Pull the data from the message. */
pull_file_id_24((char *)data->data, &id);
file_id = (unsigned long)IVAL(data->data, 24);
DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n",
server_id_str(talloc_tos(), &src), file_id_string_tos(&id),
(unsigned int)file_id));
fsp = initial_break_processing(sconn, id, file_id);
if (fsp == NULL) {
DEBUG(3, ("Got a kernel oplock break message for a file "
"I don't know about\n"));
return;
}
if (fsp->sent_oplock_break != NO_BREAK_SENT) {
/* This is ok, kernel oplocks come in completely async */
DEBUG(3, ("Got a kernel oplock request while waiting for a "
"break reply\n"));
return;
}
if (sconn->using_smb2) {
send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
} else {
send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
}
fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
add_oplock_timeout_handler(fsp);
}
static bool linux_set_kernel_oplock(struct kernel_oplocks *ctx,
files_struct *fsp, int oplock_type)
{
if ( SMB_VFS_LINUX_SETLEASE(fsp, F_WRLCK) == -1) {
DEBUG(3,("linux_set_kernel_oplock: Refused oplock on file %s, "
"fd = %d, file_id = %s. (%s)\n",
fsp_str_dbg(fsp), fsp->fh->fd,
file_id_string_tos(&fsp->file_id),
strerror(errno)));
return False;
}
DEBUG(3,("linux_set_kernel_oplock: got kernel oplock on file %s, "
"file_id = %s gen_id = %lu\n",
fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id));
return True;
}
void scavenger_schedule_disconnected(struct files_struct *fsp)
{
NTSTATUS status;
struct server_id self = messaging_server_id(fsp->conn->sconn->msg_ctx);
struct timeval disconnect_time, until;
uint64_t timeout_usec;
struct scavenger_message msg;
DATA_BLOB msg_blob;
struct server_id_buf tmp;
if (fsp->op == NULL) {
return;
}
nttime_to_timeval(&disconnect_time, fsp->op->global->disconnect_time);
timeout_usec = 1000 * fsp->op->global->durable_timeout_msec;
until = timeval_add(&disconnect_time,
timeout_usec / 1000000,
timeout_usec % 1000000);
ZERO_STRUCT(msg);
msg.file_id = fsp->file_id;
msg.open_persistent_id = fsp->op->global->open_persistent_id;
msg.until = timeval_to_nttime(&until);
DEBUG(10, ("smbd: %s mark file %s as disconnected at %s with timeout "
"at %s in %fs\n",
server_id_str_buf(self, &tmp),
file_id_string_tos(&fsp->file_id),
timeval_string(talloc_tos(), &disconnect_time, true),
timeval_string(talloc_tos(), &until, true),
fsp->op->global->durable_timeout_msec/1000.0));
SMB_ASSERT(server_id_is_disconnected(&fsp->op->global->server_id));
SMB_ASSERT(!server_id_equal(&self, &smbd_scavenger_state->parent_id));
SMB_ASSERT(!smbd_scavenger_state->am_scavenger);
msg_blob = data_blob_const(&msg, sizeof(msg));
DEBUG(10, ("send message to scavenger\n"));
status = messaging_send(smbd_scavenger_state->msg,
smbd_scavenger_state->parent_id,
MSG_SMB_SCAVENGER,
&msg_blob);
if (!NT_STATUS_IS_OK(status)) {
struct server_id_buf tmp1, tmp2;
DEBUG(2, ("Failed to send message to parent smbd %s "
"from %s: %s\n",
server_id_str_buf(smbd_scavenger_state->parent_id,
&tmp1),
server_id_str_buf(self, &tmp2),
nt_errstr(status)));
}
}
static void print_brl(struct file_id id,
struct server_id pid,
enum brl_type lock_type,
enum brl_flavour lock_flav,
br_off start,
br_off size,
void *private_data)
{
static int count;
int i;
static const struct {
enum brl_type lock_type;
const char *desc;
} lock_types[] = {
{ READ_LOCK, "R" },
{ WRITE_LOCK, "W" },
{ PENDING_READ_LOCK, "PR" },
{ PENDING_WRITE_LOCK, "PW" },
{ UNLOCK_LOCK, "U" }
};
const char *desc="X";
const char *sharepath = "";
const char *fname = "";
struct share_mode_lock *share_mode;
if (count==0) {
d_printf("Byte range locks:\n");
d_printf("Pid dev:inode R/W start size SharePath Name\n");
d_printf("--------------------------------------------------------------------------------\n");
}
count++;
share_mode = fetch_share_mode_unlocked(NULL, id, "__unspecified__", "__unspecified__");
if (share_mode) {
sharepath = share_mode->servicepath;
fname = share_mode->filename;
}
for (i=0;i<ARRAY_SIZE(lock_types);i++) {
if (lock_type == lock_types[i].lock_type) {
desc = lock_types[i].desc;
}
}
d_printf("%-10s %-15s %-4s %-9.0f %-9.0f %-24s %-24s\n",
procid_str_static(&pid), file_id_string_tos(&id),
desc,
(double)start, (double)size,
sharepath, fname);
TALLOC_FREE(share_mode);
}
bool remove_oplock(files_struct *fsp)
{
bool ret;
struct share_mode_lock *lck;
DEBUG(10, ("remove_oplock called for %s\n",
fsp_str_dbg(fsp)));
/* Remove the oplock flag from the sharemode. */
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("remove_oplock: failed to lock share entry for "
"file %s\n", fsp_str_dbg(fsp)));
return False;
}
ret = remove_share_oplock(lck, fsp);
if (!ret) {
DEBUG(0,("remove_oplock: failed to remove share oplock for "
"file %s, %s, %s\n",
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
release_file_oplock(fsp);
ret = update_num_read_oplocks(fsp, lck);
if (!ret) {
DEBUG(0, ("%s: update_num_read_oplocks failed for "
"file %s, %s, %s\n",
__func__, fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
TALLOC_FREE(lck);
return ret;
}
char *share_mode_str(TALLOC_CTX *ctx, int num, const struct share_mode_entry *e)
{
return talloc_asprintf(ctx, "share_mode_entry[%d]: "
"pid = %s, share_access = 0x%x, private_options = 0x%x, "
"access_mask = 0x%x, mid = 0x%llx, type= 0x%x, gen_id = %llu, "
"uid = %u, flags = %u, file_id %s, name_hash = 0x%x",
num,
procid_str_static(&e->pid),
e->share_access, e->private_options,
e->access_mask, (unsigned long long)e->op_mid,
e->op_type, (unsigned long long)e->share_file_id,
(unsigned int)e->uid, (unsigned int)e->flags,
file_id_string_tos(&e->id),
(unsigned int)e->name_hash);
}
bool set_write_time(struct file_id fileid, struct timespec write_time)
{
struct share_mode_lock *lck;
DEBUG(5,("set_write_time: %s id=%s\n",
timestring(talloc_tos(),
convert_timespec_to_time_t(write_time)),
file_id_string_tos(&fileid)));
lck = get_existing_share_mode_lock(talloc_tos(), fileid);
if (lck == NULL) {
return False;
}
if (timespec_compare(&lck->data->old_write_time, &write_time) != 0) {
lck->data->modified = True;
lck->data->old_write_time = write_time;
}
TALLOC_FREE(lck);
return True;
}
NTSTATUS set_file_oplock(files_struct *fsp)
{
struct smbd_server_connection *sconn = fsp->conn->sconn;
struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
if (fsp->oplock_type == LEVEL_II_OPLOCK) {
if (use_kernel &&
!(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) {
DEBUG(10, ("Refusing level2 oplock, kernel oplocks "
"don't support them\n"));
return NT_STATUS_NOT_SUPPORTED;
}
}
if ((fsp->oplock_type != NO_OPLOCK) &&
use_kernel &&
!koplocks->ops->set_oplock(koplocks, fsp, fsp->oplock_type))
{
return map_nt_error_from_unix(errno);
}
fsp->sent_oplock_break = NO_BREAK_SENT;
if (fsp->oplock_type == LEVEL_II_OPLOCK) {
sconn->oplocks.level_II_open++;
} else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
sconn->oplocks.exclusive_open++;
}
DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
"tv_sec = %x, tv_usec = %x\n",
fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
(int)fsp->open_time.tv_usec ));
return NT_STATUS_OK;
}
static void print_brl(struct file_id id,
struct server_id pid,
enum brl_type lock_type,
enum brl_flavour lock_flav,
br_off start,
br_off size,
void *private_data)
{
static int count;
int i;
static const struct {
enum brl_type lock_type;
const char *desc;
} lock_types[] = {
{ READ_LOCK, "R" },
{ WRITE_LOCK, "W" },
{ PENDING_READ_LOCK, "PR" },
{ PENDING_WRITE_LOCK, "PW" },
{ UNLOCK_LOCK, "U" }
};
const char *desc="X";
const char *sharepath = "";
char *fname = NULL;
struct share_mode_lock *share_mode;
if (count==0) {
d_printf("Byte range locks:\n");
d_printf("Pid dev:inode R/W start size SharePath Name\n");
d_printf("--------------------------------------------------------------------------------\n");
}
count++;
share_mode = fetch_share_mode_unlocked(NULL, id);
if (share_mode) {
bool has_stream = share_mode->data->stream_name != NULL;
fname = talloc_asprintf(NULL, "%s%s%s",
share_mode->data->base_name,
has_stream ? ":" : "",
has_stream ?
share_mode->data->stream_name :
"");
} else {
fname = talloc_strdup(NULL, "");
if (fname == NULL) {
return;
}
}
for (i=0;i<ARRAY_SIZE(lock_types);i++) {
if (lock_type == lock_types[i].lock_type) {
desc = lock_types[i].desc;
}
}
d_printf("%-10s %-15s %-4s %-9.0f %-9.0f %-24s %-24s\n",
procid_str_static(&pid), file_id_string_tos(&id),
desc,
(double)start, (double)size,
sharepath, fname);
TALLOC_FREE(fname);
TALLOC_FREE(share_mode);
}
static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
struct server_id self = messaging_server_id(conn->sconn->msg_ctx);
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
const struct security_unix_token *del_token = NULL;
const struct security_token *del_nt_token = NULL;
bool got_tokens = false;
bool normal_close;
int ret_flock, retries = 1;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(fsp->conn->sconn->ev_ctx,
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
return NT_STATUS_INVALID_PARAMETER;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->data->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (fsp->initial_delete_on_close &&
!is_delete_on_close_set(lck, fsp->name_hash)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (get_current_vuid(conn) != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(fsp, lck,
get_current_nttok(conn),
get_current_utok(conn));
if (became_user) {
unbecome_user();
}
}
delete_file = is_delete_on_close_set(lck, fsp->name_hash);
if (delete_file) {
int i;
/* See if others still have the file open via this pathname.
If this is the case, then don't delete. If all opens are
POSIX delete now. */
for (i=0; i<lck->data->num_share_modes; i++) {
struct share_mode_entry *e = &lck->data->share_modes[i];
if (!is_valid_share_mode_entry(e)) {
continue;
}
if (e->name_hash != fsp->name_hash) {
continue;
}
if ((fsp->posix_flags & FSP_POSIX_FLAGS_OPEN)
&& (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
if (serverid_equal(&self, &e->pid) &&
(e->share_file_id == fsp->fh->gen_id)) {
continue;
}
if (share_mode_stale_pid(lck->data, i)) {
continue;
}
delete_file = False;
break;
}
}
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
normal_close = (close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE);
if (!normal_close || !delete_file) {
status = NT_STATUS_OK;
goto done;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
got_tokens = get_delete_on_close_token(lck, fsp->name_hash,
&del_nt_token, &del_token);
SMB_ASSERT(got_tokens);
if (!unix_token_equal(del_token, get_current_utok(conn))) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)del_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(del_token->uid,
del_token->gid,
del_token->ngroups,
del_token->groups,
del_nt_token);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
retry_delete:
/* temporary files with delete on close set will not be deleted on a
* cifs share using a netapp backend since they are opened with
* read + write access mask.
* close the file to allow the delete.
*/
if (fsp->can_write && !S_ISDIR(fsp->fsp_name->st.st_ex_mode) &&
fsp->fh->ref_count == 1 && retries) {
status = fd_close(fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("close_remove_share_mode: Error %s closing %s\n",
nt_errstr(status),
smb_fname_str_dbg(fsp->fsp_name)));
goto skip_retry;
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
retries = 0;
goto retry_delete;
}
} else {
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
}
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
skip_retry:
fsp->delete_on_close = false;
reset_delete_on_close_lck(fsp, lck);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
/* remove filesystem sharemodes */
ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, 0, 0);
if (ret_flock == -1) {
DEBUG(2, ("close_remove_share_mode: removing kernel flock for "
"%s failed: %s\n", fsp_str_dbg(fsp),
strerror(errno)));
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n", fsp_str_dbg(fsp)));
}
TALLOC_FREE(lck);
if (delete_file) {
/*
* Do the notification after we released the share
* mode lock. Inside notify_fname we take out another
* tdb lock. With ctdb also accessing our databases,
* this can lead to deadlocks. Putting this notify
* after the TALLOC_FREE(lck) above we avoid locking
* two records simultaneously. Notifies are async and
* informational only, so calling the notify_fname
* without holding the share mode lock should not do
* any harm.
*/
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
}
return status;
}
bool remove_oplock(files_struct *fsp)
{
bool ret;
struct share_mode_lock *lck;
DEBUG(10, ("remove_oplock called for %s\n",
fsp_str_dbg(fsp)));
/* Remove the oplock flag from the sharemode. */
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("remove_oplock: failed to lock share entry for "
"file %s\n", fsp_str_dbg(fsp)));
return False;
}
if (fsp->oplock_type == LEVEL_II_OPLOCK) {
/*
* If we're the only LEVEL_II holder, we have to remove the
* have_read_oplocks from the brlock entry
*/
struct share_mode_data *data = lck->data;
uint32_t i, num_level2;
num_level2 = 0;
for (i=0; i<data->num_share_modes; i++) {
if (data->share_modes[i].op_type == LEVEL_II_OPLOCK) {
num_level2 += 1;
}
if (num_level2 > 1) {
/*
* No need to count them all...
*/
break;
}
}
if (num_level2 == 1) {
/*
* That's only us. We are dropping that level2 oplock,
* so remove the brlock flag.
*/
struct byte_range_lock *brl;
brl = brl_get_locks(talloc_tos(), fsp);
if (brl) {
brl_set_have_read_oplocks(brl, false);
TALLOC_FREE(brl);
}
}
}
ret = remove_share_oplock(lck, fsp);
if (!ret) {
DEBUG(0,("remove_oplock: failed to remove share oplock for "
"file %s, %s, %s\n",
fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
release_file_oplock(fsp);
TALLOC_FREE(lck);
return ret;
}
static void process_oplock_break_message(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id src,
DATA_BLOB *data)
{
struct share_mode_entry msg;
files_struct *fsp;
bool break_to_level2 = False;
bool use_kernel;
struct smbd_server_connection *sconn =
talloc_get_type_abort(private_data,
struct smbd_server_connection);
struct server_id self = messaging_server_id(sconn->msg_ctx);
struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
uint16_t break_to;
if (data->data == NULL) {
DEBUG(0, ("Got NULL buffer\n"));
return;
}
if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
return;
}
/* De-linearize incoming message. */
message_to_share_mode_entry(&msg, (char *)data->data);
break_to = msg.op_type;
DEBUG(10, ("Got oplock break to %u message from pid %s: %s/%llu\n",
(unsigned)break_to, server_id_str(talloc_tos(), &src),
file_id_string_tos(&msg.id),
(unsigned long long)msg.share_file_id));
fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
if (fsp == NULL) {
/* We hit a race here. Break messages are sent, and before we
* get to process this message, we have closed the file. */
DEBUG(3, ("Did not find fsp\n"));
return;
}
if (fsp->sent_oplock_break != NO_BREAK_SENT) {
/*
* Nothing to do anymore
*/
return;
}
if (break_to == fsp->oplock_type) {
DEBUG(3, ("Already downgraded oplock on %s: %s\n",
file_id_string_tos(&fsp->file_id),
fsp_str_dbg(fsp)));
return;
}
use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
(break_to != NO_OPLOCK) &&
!(use_kernel && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
lp_level2_oplocks(SNUM(fsp->conn))) {
break_to_level2 = True;
}
/* Need to wait before sending a break
message if we sent ourselves this message. */
if (serverid_equal(&self, &src)) {
wait_before_sending_break();
}
if (sconn->using_smb2) {
send_break_message_smb2(fsp, break_to_level2 ?
OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
} else {
send_break_message_smb1(fsp, break_to_level2 ?
OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
}
if ((fsp->oplock_type == LEVEL_II_OPLOCK) && (break_to == NO_OPLOCK)) {
/*
* This is an async break without a reply and thus no timeout
*/
remove_oplock(fsp);
return;
}
fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
add_oplock_timeout_handler(fsp);
}
static files_struct *irix_oplock_receive_message(struct kernel_oplocks *_ctx)
{
struct irix_oplocks_context *ctx = talloc_get_type(_ctx->private_data,
struct irix_oplocks_context);
oplock_stat_t os;
char dummy;
struct file_id fileid;
files_struct *fsp;
/*
* TODO: is it correct to assume we only get one
* oplock break, for each byte we read from the pipe?
*/
ctx->pending = false;
/*
* Read one byte of zero to clear the
* kernel break notify message.
*/
if(read(ctx->read_fd, &dummy, 1) != 1) {
DEBUG(0,("irix_oplock_receive_message: read of kernel "
"notification failed. Error was %s.\n",
strerror(errno) ));
return NULL;
}
/*
* Do a query to get the
* device and inode of the file that has the break
* request outstanding.
*/
if(sys_fcntl_ptr(ctx->read_fd, F_OPLKSTAT, &os) < 0) {
DEBUG(0,("irix_oplock_receive_message: fcntl of kernel "
"notification failed. Error was %s.\n",
strerror(errno) ));
if(errno == EAGAIN) {
/*
* Duplicate kernel break message - ignore.
*/
return NULL;
}
return NULL;
}
/*
* We only have device and inode info here - we have to guess that this
* is the first fsp open with this dev,ino pair.
*
* NOTE: this doesn't work if any VFS modules overloads
* the file_id_create() hook!
*/
fileid = file_id_create_dev((SMB_DEV_T)os.os_dev,
(SMB_INO_T)os.os_ino);
if ((fsp = file_find_di_first(smbd_server_conn, fileid)) == NULL) {
DEBUG(0,("irix_oplock_receive_message: unable to find open "
"file with dev = %x, inode = %.0f\n",
(unsigned int)os.os_dev, (double)os.os_ino ));
return NULL;
}
DEBUG(5,("irix_oplock_receive_message: kernel oplock break request "
"received for file_id %s gen_id = %ul",
file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id ));
return fsp;
}
static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(smbd_event_context(),
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
NULL);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n",
fsp_str_dbg(fsp)));
}
if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (current_user.vuid != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(lck, True, ¤t_user.ut);
if (became_user) {
unbecome_user();
}
}
delete_file = lck->delete_on_close;
if (delete_file) {
int i;
/* See if others still have the file open. If this is the
* case, then don't delete. If all opens are POSIX delete now. */
for (i=0; i<lck->num_share_modes; i++) {
struct share_mode_entry *e = &lck->share_modes[i];
if (is_valid_share_mode_entry(e)) {
if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
delete_file = False;
break;
}
}
}
/* Notify any deferred opens waiting on this close. */
notify_deferred_opens(lck);
reply_to_oplock_break_requests(fsp);
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
|| !delete_file
|| (lck->delete_token == NULL)) {
TALLOC_FREE(lck);
return NT_STATUS_OK;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)lck->delete_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(lck->delete_token->uid,
lck->delete_token->gid,
lck->delete_token->ngroups,
lck->delete_token->groups,
NULL);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
fsp->delete_on_close = false;
set_delete_on_close_lck(lck, False, NULL);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
TALLOC_FREE(lck);
return status;
}
bool rename_share_filename(struct messaging_context *msg_ctx,
struct share_mode_lock *lck,
const char *servicepath,
uint32_t orig_name_hash,
uint32_t new_name_hash,
const struct smb_filename *smb_fname_dst)
{
struct share_mode_data *d = lck->data;
size_t sp_len;
size_t bn_len;
size_t sn_len;
size_t msg_len;
char *frm = NULL;
int i;
bool strip_two_chars = false;
bool has_stream = smb_fname_dst->stream_name != NULL;
struct server_id self_pid = messaging_server_id(msg_ctx);
DEBUG(10, ("rename_share_filename: servicepath %s newname %s\n",
servicepath, smb_fname_dst->base_name));
/*
* rename_internal_fsp() and rename_internals() add './' to
* head of newname if newname does not contain a '/'.
*/
if (smb_fname_dst->base_name[0] &&
smb_fname_dst->base_name[1] &&
smb_fname_dst->base_name[0] == '.' &&
smb_fname_dst->base_name[1] == '/') {
strip_two_chars = true;
}
d->servicepath = talloc_strdup(d, servicepath);
d->base_name = talloc_strdup(d, smb_fname_dst->base_name +
(strip_two_chars ? 2 : 0));
d->stream_name = talloc_strdup(d, smb_fname_dst->stream_name);
if (d->base_name == NULL ||
(has_stream && d->stream_name == NULL) ||
d->servicepath == NULL) {
DEBUG(0, ("rename_share_filename: talloc failed\n"));
return False;
}
d->modified = True;
sp_len = strlen(d->servicepath);
bn_len = strlen(d->base_name);
sn_len = has_stream ? strlen(d->stream_name) : 0;
msg_len = MSG_FILE_RENAMED_MIN_SIZE + sp_len + 1 + bn_len + 1 +
sn_len + 1;
/* Set up the name changed message. */
frm = talloc_array(d, char, msg_len);
if (!frm) {
return False;
}
push_file_id_24(frm, &d->id);
DEBUG(10,("rename_share_filename: msg_len = %u\n", (unsigned int)msg_len ));
strlcpy(&frm[24],
d->servicepath ? d->servicepath : "",
sp_len+1);
strlcpy(&frm[24 + sp_len + 1],
d->base_name ? d->base_name : "",
bn_len+1);
strlcpy(&frm[24 + sp_len + 1 + bn_len + 1],
d->stream_name ? d->stream_name : "",
sn_len+1);
/* Send the messages. */
for (i=0; i<d->num_share_modes; i++) {
struct share_mode_entry *se = &d->share_modes[i];
if (!is_valid_share_mode_entry(se)) {
continue;
}
/* If this is a hardlink to the inode
with a different name, skip this. */
if (se->name_hash != orig_name_hash) {
continue;
}
se->name_hash = new_name_hash;
/* But not to ourselves... */
if (serverid_equal(&se->pid, &self_pid)) {
continue;
}
if (share_mode_stale_pid(d, i)) {
continue;
}
DEBUG(10,("rename_share_filename: sending rename message to "
"pid %s file_id %s sharepath %s base_name %s "
"stream_name %s\n",
procid_str_static(&se->pid),
file_id_string_tos(&d->id),
d->servicepath, d->base_name,
has_stream ? d->stream_name : ""));
messaging_send_buf(msg_ctx, se->pid, MSG_SMB_FILE_RENAME,
(uint8 *)frm, msg_len);
}
return True;
}