--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ file opening and share modes
+ Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Jeremy Allison 2001-2004
+ Copyright (C) Volker Lendecke 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern struct current_user current_user;
+extern userdom_struct current_user_info;
+extern uint16 global_smbpid;
+extern BOOL global_client_failed_oplock_break;
+
+struct deferred_open_record {
+ BOOL delayed_for_oplocks;
+ SMB_DEV_T dev;
+ SMB_INO_T inode;
+};
+
+/****************************************************************************
+ fd support routines - attempt to do a dos_open.
+****************************************************************************/
+
+static int fd_open(struct connection_struct *conn,
+ const char *fname,
+ int flags,
+ mode_t mode)
+{
+ int fd;
+#ifdef O_NOFOLLOW
+ if (!lp_symlinks(SNUM(conn))) {
+ flags |= O_NOFOLLOW;
+ }
+#endif
+
+ fd = SMB_VFS_OPEN(conn,fname,flags,mode);
+
+ DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n", fname,
+ flags, (int)mode, fd, (fd == -1) ? strerror(errno) : "" ));
+
+ return fd;
+}
+
+/****************************************************************************
+ Close the file associated with a fsp.
+****************************************************************************/
+
+int fd_close(struct connection_struct *conn,
+ files_struct *fsp)
+{
+ if (fsp->fh->fd == -1) {
+ return 0; /* What we used to call a stat open. */
+ }
+ if (fsp->fh->ref_count > 1) {
+ return 0; /* Shared handle. Only close last reference. */
+ }
+ return fd_close_posix(conn, fsp);
+}
+
+/****************************************************************************
+ Change the ownership of a file to that of the parent directory.
+ Do this by fd if possible.
+****************************************************************************/
+
+void change_owner_to_parent(connection_struct *conn,
+ files_struct *fsp,
+ const char *fname,
+ SMB_STRUCT_STAT *psbuf)
+{
+ const char *parent_path = parent_dirname(fname);
+ SMB_STRUCT_STAT parent_st;
+ int ret;
+
+ ret = SMB_VFS_STAT(conn, parent_path, &parent_st);
+ if (ret == -1) {
+ DEBUG(0,("change_owner_to_parent: failed to stat parent "
+ "directory %s. Error was %s\n",
+ parent_path, strerror(errno) ));
+ return;
+ }
+
+ if (fsp && fsp->fh->fd != -1) {
+ become_root();
+ ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, parent_st.st_uid, (gid_t)-1);
+ unbecome_root();
+ if (ret == -1) {
+ DEBUG(0,("change_owner_to_parent: failed to fchown "
+ "file %s to parent directory uid %u. Error "
+ "was %s\n", fname,
+ (unsigned int)parent_st.st_uid,
+ strerror(errno) ));
+ }
+
+ DEBUG(10,("change_owner_to_parent: changed new file %s to "
+ "parent directory uid %u.\n", fname,
+ (unsigned int)parent_st.st_uid ));
+
+ } else {
+ /* We've already done an lstat into psbuf, and we know it's a
+ directory. If we can cd into the directory and the dev/ino
+ are the same then we can safely chown without races as
+ we're locking the directory in place by being in it. This
+ should work on any UNIX (thanks tridge :-). JRA.
+ */
+
+ pstring saved_dir;
+ SMB_STRUCT_STAT sbuf;
+
+ if (!vfs_GetWd(conn,saved_dir)) {
+ DEBUG(0,("change_owner_to_parent: failed to get "
+ "current working directory\n"));
+ return;
+ }
+
+ /* Chdir into the new path. */
+ if (vfs_ChDir(conn, fname) == -1) {
+ DEBUG(0,("change_owner_to_parent: failed to change "
+ "current working directory to %s. Error "
+ "was %s\n", fname, strerror(errno) ));
+ goto out;
+ }
+
+ if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
+ DEBUG(0,("change_owner_to_parent: failed to stat "
+ "directory '.' (%s) Error was %s\n",
+ fname, strerror(errno)));
+ goto out;
+ }
+
+ /* Ensure we're pointing at the same place. */
+ if (sbuf.st_dev != psbuf->st_dev ||
+ sbuf.st_ino != psbuf->st_ino ||
+ sbuf.st_mode != psbuf->st_mode ) {
+ DEBUG(0,("change_owner_to_parent: "
+ "device/inode/mode on directory %s changed. "
+ "Refusing to chown !\n", fname ));
+ goto out;
+ }
+
+ become_root();
+ ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
+ unbecome_root();
+ if (ret == -1) {
+ DEBUG(10,("change_owner_to_parent: failed to chown "
+ "directory %s to parent directory uid %u. "
+ "Error was %s\n", fname,
+ (unsigned int)parent_st.st_uid, strerror(errno) ));
+ goto out;
+ }
+
+ DEBUG(10,("change_owner_to_parent: changed ownership of new "
+ "directory %s to parent directory uid %u.\n",
+ fname, (unsigned int)parent_st.st_uid ));
+
+ out:
+
+ vfs_ChDir(conn,saved_dir);
+ }
+}
+
+/****************************************************************************
+ Open a file.
+****************************************************************************/
+
+static BOOL open_file(files_struct *fsp,
+ connection_struct *conn,
+ const char *fname,
+ SMB_STRUCT_STAT *psbuf,
+ int flags,
+ mode_t unx_mode,
+ uint32 access_mask)
+{
+ int accmode = (flags & O_ACCMODE);
+ int local_flags = flags;
+ BOOL file_existed = VALID_STAT(*psbuf);
+
+ fsp->fh->fd = -1;
+ errno = EPERM;
+
+ /* Check permissions */
+
+ /*
+ * This code was changed after seeing a client open request
+ * containing the open mode of (DENY_WRITE/read-only) with
+ * the 'create if not exist' bit set. The previous code
+ * would fail to open the file read only on a read-only share
+ * as it was checking the flags parameter directly against O_RDONLY,
+ * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
+ * JRA.
+ */
+
+ if (!CAN_WRITE(conn)) {
+ /* It's a read-only share - fail if we wanted to write. */
+ if(accmode != O_RDONLY) {
+ DEBUG(3,("Permission denied opening %s\n",fname));
+ return False;
+ } else if(flags & O_CREAT) {
+ /* We don't want to write - but we must make sure that
+ O_CREAT doesn't create the file if we have write
+ access into the directory.
+ */
+ flags &= ~O_CREAT;
+ local_flags &= ~O_CREAT;
+ }
+ }
+
+ /*
+ * This little piece of insanity is inspired by the
+ * fact that an NT client can open a file for O_RDONLY,
+ * but set the create disposition to FILE_EXISTS_TRUNCATE.
+ * If the client *can* write to the file, then it expects to
+ * truncate the file, even though it is opening for readonly.
+ * Quicken uses this stupid trick in backup file creation...
+ * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
+ * for helping track this one down. It didn't bite us in 2.0.x
+ * as we always opened files read-write in that release. JRA.
+ */
+
+ if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
+ DEBUG(10,("open_file: truncate requested on read-only open "
+ "for file %s\n",fname ));
+ local_flags = (flags & ~O_ACCMODE)|O_RDWR;
+ }
+
+ if ((access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
+ (local_flags & O_CREAT) ||
+ ((local_flags & O_TRUNC) == O_TRUNC) ) {
+
+ /*
+ * We can't actually truncate here as the file may be locked.
+ * open_file_shared will take care of the truncate later. JRA.
+ */
+
+ local_flags &= ~O_TRUNC;
+
+#if defined(O_NONBLOCK) && defined(S_ISFIFO)
+ /*
+ * We would block on opening a FIFO with no one else on the
+ * other end. Do what we used to do and add O_NONBLOCK to the
+ * open flags. JRA.
+ */
+
+ if (file_existed && S_ISFIFO(psbuf->st_mode)) {
+ local_flags |= O_NONBLOCK;
+ }
+#endif
+
+ /* Don't create files with Microsoft wildcard characters. */
+ if ((local_flags & O_CREAT) && !file_existed &&
+ ms_has_wild(fname)) {
+ set_saved_ntstatus(NT_STATUS_OBJECT_NAME_INVALID);
+ return False;
+ }
+
+ /* Actually do the open */
+ fsp->fh->fd = fd_open(conn, fname, local_flags, unx_mode);
+ if (fsp->fh->fd == -1) {
+ DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
+ "(flags=%d)\n",
+ fname,strerror(errno),local_flags,flags));
+ return False;
+ }
+
+ /* Inherit the ACL if the file was created. */
+ if ((local_flags & O_CREAT) && !file_existed) {
+ inherit_access_acl(conn, fname, unx_mode);
+ }
+
+ } else {
+ fsp->fh->fd = -1; /* What we used to call a stat open. */
+ }
+
+ if (!file_existed) {
+ int ret;
+
+ if (fsp->fh->fd == -1) {
+ ret = SMB_VFS_STAT(conn, fname, psbuf);
+ } else {
+ ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf);
+ /* If we have an fd, this stat should succeed. */
+ if (ret == -1) {
+ DEBUG(0,("Error doing fstat on open file %s "
+ "(%s)\n", fname,strerror(errno) ));
+ }
+ }
+
+ /* For a non-io open, this stat failing means file not found. JRA */
+ if (ret == -1) {
+ fd_close(conn, fsp);
+ return False;
+ }
+ }
+
+ /*
+ * POSIX allows read-only opens of directories. We don't
+ * want to do this (we use a different code path for this)
+ * so catch a directory open and return an EISDIR. JRA.
+ */
+
+ if(S_ISDIR(psbuf->st_mode)) {
+ fd_close(conn, fsp);
+ errno = EISDIR;
+ return False;
+ }
+
+ fsp->mode = psbuf->st_mode;
+ fsp->inode = psbuf->st_ino;
+ fsp->dev = psbuf->st_dev;
+ fsp->vuid = current_user.vuid;
+ fsp->file_pid = global_smbpid;
+ fsp->can_lock = True;
+ fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
+ if (!CAN_WRITE(conn)) {
+ fsp->can_write = False;
+ } else {
+ fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ? True : False;
+ }
+ fsp->print_file = False;
+ fsp->modified = False;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+ fsp->is_directory = False;
+ fsp->is_stat = False;
+ if (conn->aio_write_behind_list &&
+ is_in_path(fname, conn->aio_write_behind_list, conn->case_sensitive)) {
+ fsp->aio_write_behind = True;
+ }
+
+ string_set(&fsp->fsp_name,fname);
+ fsp->wcp = NULL; /* Write cache pointer. */
+
+ DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
+ *current_user_info.smb_name ? current_user_info.smb_name : conn->user,fsp->fsp_name,
+ BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
+ conn->num_files_open + 1));
+
+ errno = 0;
+ return True;
+}
+
+/*******************************************************************
+ Return True if the filename is one of the special executable types.
+********************************************************************/
+
+static BOOL is_executable(const char *fname)
+{
+ if ((fname = strrchr_m(fname,'.'))) {
+ if (strequal(fname,".com") ||
+ strequal(fname,".dll") ||
+ strequal(fname,".exe") ||
+ strequal(fname,".sym")) {
+ return True;
+ }
+ }
+ return False;
+}
+
+/****************************************************************************
+ Check if we can open a file with a share mode.
+ Returns True if conflict, False if not.
+****************************************************************************/
+
+static BOOL share_conflict(struct share_mode_entry *entry,
+ uint32 access_mask,
+ uint32 share_access)
+{
+ DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
+ "entry->share_access = 0x%x, "
+ "entry->private_options = 0x%x\n",
+ (unsigned int)entry->access_mask,
+ (unsigned int)entry->share_access,
+ (unsigned int)entry->private_options));
+
+ DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
+ (unsigned int)access_mask, (unsigned int)share_access));
+
+ if ((entry->access_mask & (FILE_WRITE_DATA|
+ FILE_APPEND_DATA|
+ FILE_READ_DATA|
+ FILE_EXECUTE|
+ DELETE_ACCESS)) == 0) {
+ DEBUG(10,("share_conflict: No conflict due to "
+ "entry->access_mask = 0x%x\n",
+ (unsigned int)entry->access_mask ));
+ return False;
+ }
+
+ if ((access_mask & (FILE_WRITE_DATA|
+ FILE_APPEND_DATA|
+ FILE_READ_DATA|
+ FILE_EXECUTE|
+ DELETE_ACCESS)) == 0) {
+ DEBUG(10,("share_conflict: No conflict due to "
+ "access_mask = 0x%x\n",
+ (unsigned int)access_mask ));
+ return False;
+ }
+
+#if 1 /* JRA TEST - Superdebug. */
+#define CHECK_MASK(num, am, right, sa, share) \
+ DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
+ (unsigned int)(num), (unsigned int)(am), \
+ (unsigned int)(right), (unsigned int)(am)&(right) )); \
+ DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
+ (unsigned int)(num), (unsigned int)(sa), \
+ (unsigned int)(share), (unsigned int)(sa)&(share) )); \
+ if (((am) & (right)) && !((sa) & (share))) { \
+ DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
+sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
+ (unsigned int)(share) )); \
+ return True; \
+ }
+#else
+#define CHECK_MASK(num, am, right, sa, share) \
+ if (((am) & (right)) && !((sa) & (share))) { \
+ DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
+sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
+ (unsigned int)(share) )); \
+ return True; \
+ }
+#endif
+
+ CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
+ share_access, FILE_SHARE_WRITE);
+ CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
+ entry->share_access, FILE_SHARE_WRITE);
+
+ CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
+ share_access, FILE_SHARE_READ);
+ CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
+ entry->share_access, FILE_SHARE_READ);
+
+ CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
+ share_access, FILE_SHARE_DELETE);
+ CHECK_MASK(6, access_mask, DELETE_ACCESS,
+ entry->share_access, FILE_SHARE_DELETE);
+
+ DEBUG(10,("share_conflict: No conflict.\n"));
+ return False;
+}
+
+#if defined(DEVELOPER)
+static void validate_my_share_entries(int num,
+ struct share_mode_entry *share_entry)
+{
+ files_struct *fsp;
+
+ if (!procid_is_me(&share_entry->pid)) {
+ return;
+ }
+
+ if (is_deferred_open_entry(share_entry) &&
+ !open_was_deferred(share_entry->op_mid)) {
+ pstring str;
+ DEBUG(0, ("Got a deferred entry without a request: "
+ "PANIC: %s\n", share_mode_str(num, share_entry)));
+ smb_panic(str);
+ }
+
+ if (!is_valid_share_mode_entry(share_entry)) {
+ return;
+ }
+
+ fsp = file_find_dif(share_entry->dev, share_entry->inode,
+ share_entry->share_file_id);
+ if (!fsp) {
+ DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
+ share_mode_str(num, share_entry) ));
+ smb_panic("validate_my_share_entries: Cannot match a "
+ "share entry with an open file\n");
+ }
+
+ if (is_deferred_open_entry(share_entry) ||
+ is_unused_share_mode_entry(share_entry)) {
+ goto panic;
+ }
+
+ if ((share_entry->op_type == NO_OPLOCK) &&
+ (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
+ /* Someone has already written to it, but I haven't yet
+ * noticed */
+ return;
+ }
+
+ if (((uint16)fsp->oplock_type) != share_entry->op_type) {
+ goto panic;
+ }
+
+ return;
+
+ panic:
+ {
+ pstring str;
+ DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
+ share_mode_str(num, share_entry) ));
+ slprintf(str, sizeof(str)-1, "validate_my_share_entries: "
+ "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
+ fsp->fsp_name, (unsigned int)fsp->oplock_type,
+ (unsigned int)share_entry->op_type );
+ smb_panic(str);
+ }
+}
+#endif
+
+static BOOL is_stat_open(uint32 access_mask)
+{
+ return (access_mask &&
+ ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
+ FILE_WRITE_ATTRIBUTES))==0) &&
+ ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
+ FILE_WRITE_ATTRIBUTES)) != 0));
+}
+
+/****************************************************************************
+ Deal with share modes
+ Invarient: Share mode must be locked on entry and exit.
+ Returns -1 on error, or number of share modes on success (may be zero).
+****************************************************************************/
+
+static NTSTATUS open_mode_check(connection_struct *conn,
+ const char *fname,
+ struct share_mode_lock *lck,
+ uint32 access_mask,
+ uint32 share_access,
+ uint32 create_options,
+ BOOL *file_existed)
+{
+ int i;
+
+ if(lck->num_share_modes == 0) {
+ return NT_STATUS_OK;
+ }
+
+ *file_existed = True;
+
+ if (is_stat_open(access_mask)) {
+ /* Stat open that doesn't trigger oplock breaks or share mode
+ * checks... ! JRA. */
+ return NT_STATUS_OK;
+ }
+
+ /* A delete on close prohibits everything */
+
+ if (lck->delete_on_close) {
+ return NT_STATUS_DELETE_PENDING;
+ }
+
+ /*
+ * Check if the share modes will give us access.
+ */
+
+#if defined(DEVELOPER)
+ for(i = 0; i < lck->num_share_modes; i++) {
+ validate_my_share_entries(i, &lck->share_modes[i]);
+ }
+#endif
+
+ if (!lp_share_modes(SNUM(conn))) {
+ return NT_STATUS_OK;
+ }
+
+ /* Now we check the share modes, after any oplock breaks. */
+ for(i = 0; i < lck->num_share_modes; i++) {
+
+ if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
+ continue;
+ }
+
+ /* someone else has a share lock on it, check to see if we can
+ * too */
+ if (share_conflict(&lck->share_modes[i],
+ access_mask, share_access)) {
+ return NT_STATUS_SHARING_VIOLATION;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+static BOOL is_delete_request(files_struct *fsp) {
+ return ((fsp->access_mask == DELETE_ACCESS) &&
+ (fsp->oplock_type == NO_OPLOCK));
+}
+
+/*
+ * 1) No files open at all: Grant whatever the client wants.
+ *
+ * 2) Exclusive (or batch) oplock around: If the requested access is a delete
+ * request, break if the oplock around is a batch oplock. If it's another
+ * requested access type, break.
+ *
+ * 3) Only level2 around: Grant level2 and do nothing else.
+ */
+
+static BOOL delay_for_oplocks(struct share_mode_lock *lck, files_struct *fsp)
+{
+ int i;
+ struct share_mode_entry *exclusive = NULL;
+ BOOL delay_it = False;
+ BOOL have_level2 = False;
+
+ if (is_stat_open(fsp->access_mask)) {
+ fsp->oplock_type = NO_OPLOCK;
+ return False;
+ }
+
+ if (lck->num_share_modes == 0) {
+ /* No files open at all: Directly grant whatever the client
+ * wants. */
+
+ if (fsp->oplock_type == NO_OPLOCK) {
+ /* Store a level2 oplock, but don't tell the client */
+ fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
+ }
+ return False;
+ }
+
+ for (i=0; i<lck->num_share_modes; i++) {
+
+ if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
+ continue;
+ }
+
+ if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
+ SMB_ASSERT(exclusive == NULL);
+ exclusive = &lck->share_modes[i];
+ }
+
+ if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
+ have_level2 = True;
+ }
+ }
+
+ if (exclusive != NULL) { /* Found an exclusive oplock */
+ SMB_ASSERT(!have_level2);
+ delay_it = is_delete_request(fsp) ?
+ BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
+ }
+
+ if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
+ /* We can at most grant level2 */
+ fsp->oplock_type = LEVEL_II_OPLOCK;
+ }
+
+ if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
+ /* Store a level2 oplock, but don't tell the client */
+ fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
+ }
+
+ if (delay_it) {
+ BOOL ret;
+ char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
+
+ DEBUG(10, ("Sending break request to PID %s\n",
+ procid_str_static(&exclusive->pid)));
+ exclusive->op_mid = get_current_mid();
+
+ share_mode_entry_to_message(msg, exclusive);
+
+ become_root();
+ ret = message_send_pid(exclusive->pid, MSG_SMB_BREAK_REQUEST,
+ msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
+ unbecome_root();
+ if (!ret) {
+ DEBUG(3, ("Could not send oplock break message\n"));
+ }
+ file_free(fsp);
+ }
+
+ return delay_it;
+}
+
+static BOOL request_timed_out(struct timeval request_time,
+ struct timeval timeout)
+{
+ struct timeval now, end_time;
+ GetTimeOfDay(&now);
+ end_time = timeval_sum(&request_time, &timeout);
+ return (timeval_compare(&end_time, &now) < 0);
+}
+
+/****************************************************************************
+ Handle the 1 second delay in returning a SHARING_VIOLATION error.
+****************************************************************************/
+
+static void defer_open(struct share_mode_lock *lck,
+ struct timeval request_time,
+ struct timeval timeout,
+ struct deferred_open_record *state)
+{
+ uint16 mid = get_current_mid();
+ int i;
+
+ /* Paranoia check */
+
+ for (i=0; i<lck->num_share_modes; i++) {
+ struct share_mode_entry *e = &lck->share_modes[i];
+
+ if (!is_deferred_open_entry(e)) {
+ continue;
+ }
+
+ if (procid_is_me(&e->pid) && (e->op_mid == mid)) {
+ DEBUG(0, ("Trying to defer an already deferred "
+ "request: mid=%d, exiting\n", mid));
+ exit_server("exiting");
+ }
+ }
+
+ /* End paranoia check */
+
+ DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
+ "open entry for mid %u\n",
+ (unsigned int)request_time.tv_sec,
+ (unsigned int)request_time.tv_usec,
+ (unsigned int)mid));
+
+ if (!push_deferred_smb_message(mid, request_time, timeout,
+ (char *)state, sizeof(*state))) {
+ exit_server("push_deferred_smb_message failed\n");
+ }
+ add_deferred_open(lck, mid, request_time, state->dev, state->inode);
+
+ /*
+ * Push the MID of this packet on the signing queue.
+ * We only do this once, the first time we push the packet
+ * onto the deferred open queue, as this has a side effect
+ * of incrementing the response sequence number.
+ */
+
+ srv_defer_sign_response(mid);
+}
+
+/****************************************************************************
+ Set a kernel flock on a file for NFS interoperability.
+ This requires a patch to Linux.
+****************************************************************************/
+
+static void kernel_flock(files_struct *fsp, uint32 share_mode)
+{
+#if HAVE_KERNEL_SHARE_MODES
+ int kernel_mode = 0;
+ if (share_mode == FILE_SHARE_WRITE) {
+ kernel_mode = LOCK_MAND|LOCK_WRITE;
+ } else if (share_mode == FILE_SHARE_READ) {
+ kernel_mode = LOCK_MAND|LOCK_READ;
+ } else if (share_mode == FILE_SHARE_NONE) {
+ kernel_mode = LOCK_MAND;
+ }
+ if (kernel_mode) {
+ flock(fsp->fh->fd, kernel_mode);
+ }
+#endif
+ ;
+}
+
+/****************************************************************************
+ On overwrite open ensure that the attributes match.
+****************************************************************************/
+
+static BOOL open_match_attributes(connection_struct *conn,
+ const char *path,
+ uint32 old_dos_attr,
+ uint32 new_dos_attr,
+ mode_t existing_unx_mode,
+ mode_t new_unx_mode,
+ mode_t *returned_unx_mode)
+{
+ uint32 noarch_old_dos_attr, noarch_new_dos_attr;
+
+ noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
+ noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
+
+ if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
+ (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
+ *returned_unx_mode = new_unx_mode;
+ } else {
+ *returned_unx_mode = (mode_t)0;
+ }
+
+ DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
+ "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
+ "returned_unx_mode = 0%o\n",
+ path,
+ (unsigned int)old_dos_attr,
+ (unsigned int)existing_unx_mode,
+ (unsigned int)new_dos_attr,
+ (unsigned int)*returned_unx_mode ));
+
+ /* If we're mapping SYSTEM and HIDDEN ensure they match. */
+ if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
+ if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
+ !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
+ return False;
+ }
+ }
+ if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
+ if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
+ !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
+ return False;
+ }
+ }
+ return True;
+}
+
+/****************************************************************************
+ Special FCB or DOS processing in the case of a sharing violation.
+ Try and find a duplicated file handle.
+****************************************************************************/
+
+static files_struct *fcb_or_dos_open(connection_struct *conn,
+ const char *fname, SMB_DEV_T dev,
+ SMB_INO_T inode,
+ uint32 access_mask,
+ uint32 share_access,
+ uint32 create_options)
+{
+ files_struct *fsp;
+ files_struct *dup_fsp;
+
+ DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
+ "file %s.\n", fname ));
+
+ for(fsp = file_find_di_first(dev, inode); fsp;
+ fsp = file_find_di_next(fsp)) {
+
+ DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
+ "vuid = %u, file_pid = %u, private_options = 0x%x "
+ "access_mask = 0x%x\n", fsp->fsp_name,
+ fsp->fh->fd, (unsigned int)fsp->vuid,
+ (unsigned int)fsp->file_pid,
+ (unsigned int)fsp->fh->private_options,
+ (unsigned int)fsp->access_mask ));
+
+ if (fsp->fh->fd != -1 &&
+ fsp->vuid == current_user.vuid &&
+ fsp->file_pid == global_smbpid &&
+ (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
+ NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
+ (fsp->access_mask & FILE_WRITE_DATA) &&
+ strequal(fsp->fsp_name, fname)) {
+ DEBUG(10,("fcb_or_dos_open: file match\n"));
+ break;
+ }
+ }
+
+ if (!fsp) {
+ return NULL;
+ }
+
+ /* quite an insane set of semantics ... */
+ if (is_executable(fname) &&
+ (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
+ DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
+ return NULL;
+ }
+
+ /* We need to duplicate this fsp. */
+ dup_fsp = dup_file_fsp(fsp, access_mask, share_access, create_options);
+ if (!dup_fsp) {
+ return NULL;
+ }
+
+ return dup_fsp;
+}
+
+/****************************************************************************
+ Open a file with a share mode - old openX method - map into NTCreate.
+****************************************************************************/
+
+BOOL map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
+ uint32 *paccess_mask,
+ uint32 *pshare_mode,
+ uint32 *pcreate_disposition,
+ uint32 *pcreate_options)
+{
+ uint32 access_mask;
+ uint32 share_mode;
+ uint32 create_disposition;
+ uint32 create_options = 0;
+
+ DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
+ "open_func = 0x%x\n",
+ fname, (unsigned int)deny_mode, (unsigned int)open_func ));
+
+ /* Create the NT compatible access_mask. */
+ switch (GET_OPENX_MODE(deny_mode)) {
+ case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
+ case DOS_OPEN_RDONLY:
+ access_mask = FILE_GENERIC_READ;
+ break;
+ case DOS_OPEN_WRONLY:
+ access_mask = FILE_GENERIC_WRITE;
+ break;
+ case DOS_OPEN_RDWR:
+ case DOS_OPEN_FCB:
+ access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
+ break;
+ default:
+ DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
+ (unsigned int)GET_OPENX_MODE(deny_mode)));
+ return False;
+ }
+
+ /* Create the NT compatible create_disposition. */
+ switch (open_func) {
+ case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
+ create_disposition = FILE_CREATE;
+ break;
+
+ case OPENX_FILE_EXISTS_OPEN:
+ create_disposition = FILE_OPEN;
+ break;
+
+ case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
+ create_disposition = FILE_OPEN_IF;
+ break;
+
+ case OPENX_FILE_EXISTS_TRUNCATE:
+ create_disposition = FILE_OVERWRITE;
+ break;
+
+ case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
+ create_disposition = FILE_OVERWRITE_IF;
+ break;
+
+ default:
+ /* From samba4 - to be confirmed. */
+ if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
+ create_disposition = FILE_CREATE;
+ break;
+ }
+ DEBUG(10,("map_open_params_to_ntcreate: bad "
+ "open_func 0x%x\n", (unsigned int)open_func));
+ return False;
+ }
+
+ /* Create the NT compatible share modes. */
+ switch (GET_DENY_MODE(deny_mode)) {
+ case DENY_ALL:
+ share_mode = FILE_SHARE_NONE;
+ break;
+
+ case DENY_WRITE:
+ share_mode = FILE_SHARE_READ;
+ break;
+
+ case DENY_READ:
+ share_mode = FILE_SHARE_WRITE;
+ break;
+
+ case DENY_NONE:
+ share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
+ break;
+
+ case DENY_DOS:
+ create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
+ if (is_executable(fname)) {
+ share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
+ } else {
+ if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
+ share_mode = FILE_SHARE_READ;
+ } else {
+ share_mode = FILE_SHARE_NONE;
+ }
+ }
+ break;
+
+ case DENY_FCB:
+ create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
+ share_mode = FILE_SHARE_NONE;
+ break;
+
+ default:
+ DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
+ (unsigned int)GET_DENY_MODE(deny_mode) ));
+ return False;
+ }
+
+ DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
+ "share_mode = 0x%x, create_disposition = 0x%x, "
+ "create_options = 0x%x\n",
+ fname,
+ (unsigned int)access_mask,
+ (unsigned int)share_mode,
+ (unsigned int)create_disposition,
+ (unsigned int)create_options ));
+
+ if (paccess_mask) {
+ *paccess_mask = access_mask;
+ }
+ if (pshare_mode) {
+ *pshare_mode = share_mode;
+ }
+ if (pcreate_disposition) {
+ *pcreate_disposition = create_disposition;
+ }
+ if (pcreate_options) {
+ *pcreate_options = create_options;
+ }
+
+ return True;
+
+}
+
+/* Map generic permissions to file object specific permissions */
+
+struct generic_mapping file_generic_mapping = {
+ FILE_GENERIC_READ,
+ FILE_GENERIC_WRITE,
+ FILE_GENERIC_EXECUTE,
+ FILE_GENERIC_ALL
+};
+
+/****************************************************************************
+ Open a file with a share mode.
+****************************************************************************/
+
+files_struct *open_file_ntcreate(connection_struct *conn,
+ const char *fname,
+ SMB_STRUCT_STAT *psbuf,
+ uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
+ uint32 share_access, /* share constants (FILE_SHARE_READ etc). */
+ uint32 create_disposition, /* FILE_OPEN_IF etc. */
+ uint32 create_options, /* options such as delete on close. */
+ uint32 new_dos_attributes, /* attributes used for new file. */
+ int oplock_request, /* internal Samba oplock codes. */
+ /* Information (FILE_EXISTS etc.) */
+ int *pinfo)
+{
+ int flags=0;
+ int flags2=0;
+ BOOL file_existed = VALID_STAT(*psbuf);
+ BOOL def_acl = False;
+ BOOL internal_only_open = False;
+ SMB_DEV_T dev = 0;
+ SMB_INO_T inode = 0;
+ BOOL fsp_open = False;
+ files_struct *fsp = NULL;
+ mode_t new_unx_mode = (mode_t)0;
+ mode_t unx_mode = (mode_t)0;
+ int info;
+ uint32 existing_dos_attributes = 0;
+ struct pending_message_list *pml = NULL;
+ uint16 mid = get_current_mid();
+ BOOL delayed_for_oplocks = False;
+ struct timeval request_time = timeval_zero();
+ struct share_mode_lock *lck = NULL;
+ NTSTATUS status;
+
+ if (conn->printer) {
+ /*
+ * Printers are handled completely differently.
+ * Most of the passed parameters are ignored.
+ */
+
+ if (pinfo) {
+ *pinfo = FILE_WAS_CREATED;
+ }
+
+ DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
+
+ return print_fsp_open(conn, fname);
+ }
+
+ /* We add aARCH to this as this mode is only used if the file is
+ * created new. */
+ unx_mode = unix_mode(conn, new_dos_attributes | aARCH,fname, True);
+
+ DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
+ "access_mask=0x%x share_access=0x%x "
+ "create_disposition = 0x%x create_options=0x%x "
+ "unix mode=0%o oplock_request=%d\n",
+ fname, new_dos_attributes, access_mask, share_access,
+ create_disposition, create_options, unx_mode,
+ oplock_request));
+
+ if (oplock_request == INTERNAL_OPEN_ONLY) {
+ internal_only_open = True;
+ oplock_request = 0;
+ }
+
+ if ((pml = get_open_deferred_message(mid)) != NULL) {
+ struct deferred_open_record *state =
+ (struct deferred_open_record *)pml->private_data.data;
+
+ request_time = pml->request_time;
+ delayed_for_oplocks = state->delayed_for_oplocks;
+
+ /* There could be a race condition where the dev/inode pair
+ has changed since we deferred the message. If so, just
+ remove the deferred open entry and return sharing
+ violation. */
+
+ /* If the timeout value is non-zero, we need to just return
+ sharing violation. Don't retry the open as we were not
+ notified of a close and we don't want to trigger another
+ spurious oplock break. */
+
+ /* Now remove the deferred open entry under lock. */
+ lck = get_share_mode_lock(NULL, state->dev, state->inode, NULL, NULL);
+ if (lck == NULL) {
+ DEBUG(0, ("could not get share mode lock\n"));
+ } else {
+ del_deferred_open_entry(lck, mid);
+ talloc_destroy(lck);
+ }
+
+ /* Ensure we don't reprocess this message. */
+ remove_deferred_open_smb_message(mid);
+ }
+
+ if (!check_name(fname,conn)) {
+ return NULL;
+ }
+
+ new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
+ if (file_existed) {
+ existing_dos_attributes = dos_mode(conn, fname, psbuf);
+ }
+
+ /* ignore any oplock requests if oplocks are disabled */
+ if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
+ IS_VETO_OPLOCK_PATH(conn, fname)) {
+ oplock_request = 0;
+ }
+
+ /* this is for OS/2 long file names - say we don't support them */
+ if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
+ /* OS/2 Workplace shell fix may be main code stream in a later
+ * release. */
+ set_saved_error_triple(ERRDOS, ERRcannotopen,
+ NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
+ "supported.\n"));
+ return NULL;
+ }
+
+ switch( create_disposition ) {
+ /*
+ * Currently we're using FILE_SUPERSEDE as the same as
+ * FILE_OVERWRITE_IF but they really are
+ * different. FILE_SUPERSEDE deletes an existing file
+ * (requiring delete access) then recreates it.
+ */
+ case FILE_SUPERSEDE:
+ /* If file exists replace/overwrite. If file doesn't
+ * exist create. */
+ flags2 |= (O_CREAT | O_TRUNC);
+ break;
+
+ case FILE_OVERWRITE_IF:
+ /* If file exists replace/overwrite. If file doesn't
+ * exist create. */
+ flags2 |= (O_CREAT | O_TRUNC);
+ break;
+
+ case FILE_OPEN:
+ /* If file exists open. If file doesn't exist error. */
+ if (!file_existed) {
+ DEBUG(5,("open_file_ntcreate: FILE_OPEN "
+ "requested for file %s and file "
+ "doesn't exist.\n", fname ));
+ set_saved_ntstatus(NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ errno = ENOENT;
+ return NULL;
+ }
+ break;
+
+ case FILE_OVERWRITE:
+ /* If file exists overwrite. If file doesn't exist
+ * error. */
+ if (!file_existed) {
+ DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
+ "requested for file %s and file "
+ "doesn't exist.\n", fname ));
+ set_saved_ntstatus(NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ errno = ENOENT;
+ return NULL;
+ }
+ flags2 |= O_TRUNC;
+ break;
+
+ case FILE_CREATE:
+ /* If file exists error. If file doesn't exist
+ * create. */
+ if (file_existed) {
+ DEBUG(5,("open_file_ntcreate: FILE_CREATE "
+ "requested for file %s and file "
+ "already exists.\n", fname ));
+ if (S_ISDIR(psbuf->st_mode)) {
+ errno = EISDIR;
+ } else {
+ errno = EEXIST;
+ }
+ return NULL;
+ }
+ flags2 |= (O_CREAT|O_EXCL);
+ break;
+
+ case FILE_OPEN_IF:
+ /* If file exists open. If file doesn't exist
+ * create. */
+ flags2 |= O_CREAT;
+ break;
+
+ default:
+ set_saved_ntstatus(NT_STATUS_INVALID_PARAMETER);
+ return NULL;
+ }
+
+ /* We only care about matching attributes on file exists and
+ * overwrite. */
+
+ if (file_existed && ((create_disposition == FILE_OVERWRITE) ||
+ (create_disposition == FILE_OVERWRITE_IF))) {
+ if (!open_match_attributes(conn, fname,
+ existing_dos_attributes,
+ new_dos_attributes, psbuf->st_mode,
+ unx_mode, &new_unx_mode)) {
+ DEBUG(5,("open_file_ntcreate: attributes missmatch "
+ "for file %s (%x %x) (0%o, 0%o)\n",
+ fname, existing_dos_attributes,
+ new_dos_attributes,
+ (unsigned int)psbuf->st_mode,
+ (unsigned int)unx_mode ));
+ errno = EACCES;
+ return NULL;
+ }
+ }
+
+ /* This is a nasty hack - must fix... JRA. */
+ if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
+ access_mask = FILE_GENERIC_ALL;
+ }
+
+ /*
+ * Convert GENERIC bits to specific bits.
+ */
+
+ se_map_generic(&access_mask, &file_generic_mapping);
+
+ DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
+ "access_mask=0x%x\n", fname, access_mask ));
+
+ /*
+ * Note that we ignore the append flag as append does not
+ * mean the same thing under DOS and Unix.
+ */
+
+ if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
+ flags = O_RDWR;
+ } else {
+ flags = O_RDONLY;
+ }
+
+ /*
+ * Currently we only look at FILE_WRITE_THROUGH for create options.
+ */
+
+#if defined(O_SYNC)
+ if (create_options & FILE_WRITE_THROUGH) {
+ flags2 |= O_SYNC;
+ }
+#endif /* O_SYNC */
+
+ if (!CAN_WRITE(conn)) {
+ /*
+ * We should really return a permission denied error if either
+ * O_CREAT or O_TRUNC are set, but for compatibility with
+ * older versions of Samba we just AND them out.
+ */
+ flags2 &= ~(O_CREAT|O_TRUNC);
+ }
+
+ /*
+ * Ensure we can't write on a read-only share or file.
+ */
+
+ if (flags != O_RDONLY && file_existed &&
+ (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
+ DEBUG(5,("open_file_ntcreate: write access requested for "
+ "file %s on read only %s\n",
+ fname, !CAN_WRITE(conn) ? "share" : "file" ));
+ set_saved_ntstatus(NT_STATUS_ACCESS_DENIED);
+ errno = EACCES;
+ return NULL;
+ }
+
+ fsp = file_new(conn);
+ if(!fsp) {
+ return NULL;
+ }
+
+ fsp->dev = psbuf->st_dev;
+ fsp->inode = psbuf->st_ino;
+ fsp->share_access = share_access;
+ fsp->fh->private_options = create_options;
+ fsp->access_mask = access_mask;
+ fsp->oplock_type = oplock_request;
+
+ if (timeval_is_zero(&request_time)) {
+ request_time = fsp->open_time;
+ }
+
+ if (file_existed) {
+
+ dev = psbuf->st_dev;
+ inode = psbuf->st_ino;
+
+ lck = get_share_mode_lock(NULL, dev, inode,
+ conn->connectpath,
+ fname);
+
+ if (lck == NULL) {
+ DEBUG(0, ("Could not get share mode lock\n"));
+ set_saved_ntstatus(NT_STATUS_SHARING_VIOLATION);
+ return NULL;
+ }
+
+ if (delay_for_oplocks(lck, fsp)) {
+ struct deferred_open_record state;
+ struct timeval timeout;
+
+ if (delayed_for_oplocks) {
+ DEBUG(0, ("Trying to delay for oplocks "
+ "twice\n"));
+ exit_server("exiting");
+ }
+
+ timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
+
+ /* Normally the smbd we asked should respond within
+ * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
+ * the client did, give twice the timeout as a safety
+ * measure here in case the other smbd is stuck
+ * somewhere else. */
+
+ state.delayed_for_oplocks = True;
+ state.dev = dev;
+ state.inode = inode;
+
+ if (!request_timed_out(request_time, timeout)) {
+ defer_open(lck, request_time, timeout,
+ &state);
+ }
+
+ talloc_free(lck);
+ return NULL;
+ }
+
+ status = open_mode_check(conn, fname, lck,
+ access_mask, share_access,
+ create_options, &file_existed);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
+ /* DELETE_PENDING is not deferred for a second */
+ set_saved_ntstatus(status);
+ talloc_free(lck);
+ file_free(fsp);
+ return NULL;
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+
+ SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
+
+ /* Check if this can be done with the deny_dos and fcb
+ * calls. */
+ if (create_options &
+ (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
+ NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
+ files_struct *fsp_dup;
+ fsp_dup = fcb_or_dos_open(conn, fname, dev,
+ inode, access_mask,
+ share_access,
+ create_options);
+
+ if (fsp_dup) {
+ talloc_free(lck);
+ file_free(fsp);
+ if (pinfo) {
+ *pinfo = FILE_WAS_OPENED;
+ }
+ conn->num_files_open++;
+ return fsp_dup;
+ }
+ }
+
+ /*
+ * This next line is a subtlety we need for
+ * MS-Access. If a file open will fail due to share
+ * permissions and also for security (access) reasons,
+ * we need to return the access failed error, not the
+ * share error. This means we must attempt to open the
+ * file anyway in order to get the UNIX access error -
+ * even if we're going to fail the open for share
+ * reasons. This is bad, as we're burning another fd
+ * if there are existing locks but there's nothing
+ * else we can do. We also ensure we're not going to
+ * create or tuncate the file as we only want an
+ * access decision at this stage. JRA.
+ */
+ errno = 0;
+ fsp_open = open_file(fsp,conn,fname,psbuf,
+ flags|(flags2&~(O_TRUNC|O_CREAT)),
+ unx_mode,access_mask);
+
+ DEBUG(4,("open_file_ntcreate : share_mode deny - "
+ "calling open_file with flags=0x%X "
+ "flags2=0x%X mode=0%o returned %d\n",
+ flags, (flags2&~(O_TRUNC|O_CREAT)),
+ (unsigned int)unx_mode, (int)fsp_open ));
+
+ if (!fsp_open && errno) {
+ /* Default error. */
+ set_saved_ntstatus(NT_STATUS_ACCESS_DENIED);
+ }
+
+ /*
+ * If we're returning a share violation, ensure we
+ * cope with the braindead 1 second delay.
+ */
+
+ if (!internal_only_open &&
+ lp_defer_sharing_violations()) {
+ struct timeval timeout;
+ struct deferred_open_record state;
+
+ timeout = timeval_set(0, SHARING_VIOLATION_USEC_WAIT);
+
+ state.delayed_for_oplocks = False;
+ state.dev = dev;
+ state.inode = inode;
+
+ if (!request_timed_out(request_time,
+ timeout)) {
+ defer_open(lck, request_time, timeout,
+ &state);
+ }
+ }
+
+ talloc_free(lck);
+ if (fsp_open) {
+ fd_close(conn, fsp);
+ /*
+ * We have detected a sharing violation here
+ * so return the correct error code
+ */
+ set_saved_ntstatus(NT_STATUS_SHARING_VIOLATION);
+ }
+ file_free(fsp);
+ return NULL;
+ }
+
+ /*
+ * We exit this block with the share entry *locked*.....
+ */
+ }
+
+ SMB_ASSERT(!file_existed || (lck != NULL));
+
+ /*
+ * Ensure we pay attention to default ACLs on directories if required.
+ */
+
+ if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
+ (def_acl = directory_has_default_acl(conn,
+ parent_dirname(fname)))) {
+ unx_mode = 0777;
+ }
+
+ DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
+ (unsigned int)flags, (unsigned int)flags2,
+ (unsigned int)unx_mode));
+
+ /*
+ * open_file strips any O_TRUNC flags itself.
+ */
+
+ fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,unx_mode,
+ access_mask);
+
+ if (!fsp_open) {
+ if (lck != NULL) {
+ talloc_free(lck);
+ }
+ file_free(fsp);
+ return NULL;
+ }
+
+ if (!file_existed) {
+
+ /*
+ * Deal with the race condition where two smbd's detect the
+ * file doesn't exist and do the create at the same time. One
+ * of them will win and set a share mode, the other (ie. this
+ * one) should check if the requested share mode for this
+ * create is allowed.
+ */
+
+ /*
+ * Now the file exists and fsp is successfully opened,
+ * fsp->dev and fsp->inode are valid and should replace the
+ * dev=0,inode=0 from a non existent file. Spotted by
+ * Nadav Danieli <nadavd@exanet.com>. JRA.
+ */
+
+ dev = fsp->dev;
+ inode = fsp->inode;
+
+ lck = get_share_mode_lock(NULL, dev, inode,
+ conn->connectpath,
+ fname);
+
+ if (lck == NULL) {
+ DEBUG(0, ("open_file_ntcreate: Could not get share mode lock for %s\n", fname));
+ fd_close(conn, fsp);
+ file_free(fsp);
+ set_saved_ntstatus(NT_STATUS_SHARING_VIOLATION);
+ return NULL;
+ }
+
+ status = open_mode_check(conn, fname, lck,
+ access_mask, share_access,
+ create_options, &file_existed);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ struct deferred_open_record state;
+
+ fd_close(conn, fsp);
+ file_free(fsp);
+
+ state.delayed_for_oplocks = False;
+ state.dev = dev;
+ state.inode = inode;
+
+ /* Do it all over again immediately. In the second
+ * round we will find that the file existed and handle
+ * the DELETE_PENDING and FCB cases correctly. No need
+ * to duplicate the code here. Essentially this is a
+ * "goto top of this function", but don't tell
+ * anybody... */
+
+ defer_open(lck, request_time, timeval_zero(),
+ &state);
+ talloc_free(lck);
+ return NULL;
+ }
+
+ /*
+ * We exit this block with the share entry *locked*.....
+ */
+ }
+
+ SMB_ASSERT(lck != NULL);
+
+ /* note that we ignore failure for the following. It is
+ basically a hack for NFS, and NFS will never set one of
+ these only read them. Nobody but Samba can ever set a deny
+ mode and we have already checked our more authoritative
+ locking database for permission to set this deny mode. If
+ the kernel refuses the operations then the kernel is wrong */
+
+ kernel_flock(fsp, share_access);
+
+ /*
+ * At this point onwards, we can guarentee that the share entry
+ * is locked, whether we created the file or not, and that the
+ * deny mode is compatible with all current opens.
+ */
+
+ /*
+ * If requested, truncate the file.
+ */
+
+ if (flags2&O_TRUNC) {
+ /*
+ * We are modifing the file after open - update the stat
+ * struct..
+ */
+ if ((SMB_VFS_FTRUNCATE(fsp,fsp->fh->fd,0) == -1) ||
+ (SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf)==-1)) {
+ talloc_free(lck);
+ fd_close(conn,fsp);
+ file_free(fsp);
+ return NULL;
+ }
+ }
+
+ /* Record the options we were opened with. */
+ fsp->share_access = share_access;
+ fsp->fh->private_options = create_options;
+ fsp->access_mask = access_mask;
+
+ if (file_existed) {
+ if (!(flags2 & O_TRUNC)) {
+ info = FILE_WAS_OPENED;
+ } else {
+ info = FILE_WAS_OVERWRITTEN;
+ }
+ } else {
+ info = FILE_WAS_CREATED;
+ /* Change the owner if required. */
+ if (lp_inherit_owner(SNUM(conn))) {
+ change_owner_to_parent(conn, fsp, fsp->fsp_name,
+ psbuf);
+ }
+ }
+
+ if (pinfo) {
+ *pinfo = info;
+ }
+
+ /*
+ * Setup the oplock info in both the shared memory and
+ * file structs.
+ */
+
+ if ((fsp->oplock_type != NO_OPLOCK) &&
+ (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
+ if (!set_file_oplock(fsp, fsp->oplock_type)) {
+ /* Could not get the kernel oplock */
+ fsp->oplock_type = NO_OPLOCK;
+ }
+ }
+ set_share_mode(lck, fsp, 0, fsp->oplock_type);
+
+ if (create_options & FILE_DELETE_ON_CLOSE) {
+ uint32 dosattr= existing_dos_attributes;
+ NTSTATUS result;
+
+ if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED ||
+ info == FILE_WAS_SUPERSEDED) {
+ dosattr = new_dos_attributes;
+ }
+
+ result = can_set_delete_on_close(fsp, True, dosattr);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ /* Remember to delete the mode we just added. */
+ del_share_mode(lck, fsp);
+ talloc_free(lck);
+ fd_close(conn,fsp);
+ file_free(fsp);
+ set_saved_ntstatus(result);
+ return NULL;
+ }
+ lck->delete_on_close = True;
+ lck->modified = True;
+ }
+
+ if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED ||
+ info == FILE_WAS_SUPERSEDED) {
+ /* Files should be initially set as archive */
+ if (lp_map_archive(SNUM(conn)) ||
+ lp_store_dos_attributes(SNUM(conn))) {
+ file_set_dosmode(conn, fname,
+ new_dos_attributes | aARCH, NULL,
+ True);
+ }
+ }
+
+ /*
+ * Take care of inherited ACLs on created files - if default ACL not
+ * selected.
+ */
+
+ if (!file_existed && !def_acl) {
+
+ int saved_errno = errno; /* We might get ENOSYS in the next
+ * call.. */
+
+ if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd, unx_mode) == -1
+ && errno == ENOSYS) {
+ errno = saved_errno; /* Ignore ENOSYS */
+ }
+
+ } else if (new_unx_mode) {
+
+ int ret = -1;
+
+ /* Attributes need changing. File already existed. */
+
+ {
+ int saved_errno = errno; /* We might get ENOSYS in the
+ * next call.. */
+ ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd,
+ new_unx_mode);
+
+ if (ret == -1 && errno == ENOSYS) {
+ errno = saved_errno; /* Ignore ENOSYS */
+ } else {
+ DEBUG(5, ("open_file_shared: reset "
+ "attributes of file %s to 0%o\n",
+ fname, (unsigned int)new_unx_mode));
+ ret = 0; /* Don't do the fchmod below. */
+ }
+ }
+
+ if ((ret == -1) &&
+ (SMB_VFS_FCHMOD(fsp, fsp->fh->fd, new_unx_mode) == -1))
+ DEBUG(5, ("open_file_shared: failed to reset "
+ "attributes of file %s to 0%o\n",
+ fname, (unsigned int)new_unx_mode));
+ }
+
+ /* If this is a successful open, we must remove any deferred open
+ * records. */
+ del_deferred_open_entry(lck, mid);
+ talloc_free(lck);
+
+ conn->num_files_open++;
+
+ return fsp;
+}
+
+/****************************************************************************
+ Open a file for for write to ensure that we can fchmod it.
+****************************************************************************/
+
+files_struct *open_file_fchmod(connection_struct *conn, const char *fname,
+ SMB_STRUCT_STAT *psbuf)
+{
+ files_struct *fsp = NULL;
+ BOOL fsp_open;
+
+ if (!VALID_STAT(*psbuf)) {
+ return NULL;
+ }
+
+ fsp = file_new(conn);
+ if(!fsp) {
+ return NULL;
+ }
+
+ /* note! we must use a non-zero desired access or we don't get
+ a real file descriptor. Oh what a twisted web we weave. */
+ fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0,FILE_WRITE_DATA);
+
+ /*
+ * This is not a user visible file open.
+ * Don't set a share mode and don't increment
+ * the conn->num_files_open.
+ */
+
+ if (!fsp_open) {
+ file_free(fsp);
+ return NULL;
+ }
+
+ return fsp;
+}
+
+/****************************************************************************
+ Close the fchmod file fd - ensure no locks are lost.
+****************************************************************************/
+
+int close_file_fchmod(files_struct *fsp)
+{
+ int ret = fd_close(fsp->conn, fsp);
+ file_free(fsp);
+ return ret;
+}
+
+/****************************************************************************
+ Open a directory from an NT SMB call.
+****************************************************************************/
+
+files_struct *open_directory(connection_struct *conn,
+ const char *fname,
+ SMB_STRUCT_STAT *psbuf,
+ uint32 access_mask,
+ uint32 share_access,
+ uint32 create_disposition,
+ uint32 create_options,
+ int *pinfo)
+{
+ files_struct *fsp = NULL;
+ BOOL dir_existed = VALID_STAT(*psbuf) ? True : False;
+ BOOL create_dir = False;
+ struct share_mode_lock *lck = NULL;
+ NTSTATUS status;
+ int info = 0;
+
+ DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
+ "share_access = 0x%x create_options = 0x%x, "
+ "create_disposition = 0x%x\n",
+ fname,
+ (unsigned int)access_mask,
+ (unsigned int)share_access,
+ (unsigned int)create_options,
+ (unsigned int)create_disposition));
+
+ if (is_ntfs_stream_name(fname)) {
+ DEBUG(0,("open_directory: %s is a stream name!\n", fname ));
+ set_saved_ntstatus(NT_STATUS_NOT_A_DIRECTORY);
+ return NULL;
+ }
+
+ switch( create_disposition ) {
+ case FILE_OPEN:
+ /* If directory exists open. If directory doesn't
+ * exist error. */
+ if (!dir_existed) {
+ DEBUG(5,("open_directory: FILE_OPEN requested "
+ "for directory %s and it doesn't "
+ "exist.\n", fname ));
+ set_saved_ntstatus(NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ return NULL;
+ }
+ info = FILE_WAS_OPENED;
+ break;
+
+ case FILE_CREATE:
+ /* If directory exists error. If directory doesn't
+ * exist create. */
+ if (dir_existed) {
+ DEBUG(5,("open_directory: FILE_CREATE "
+ "requested for directory %s and it "
+ "already exists.\n", fname ));
+ set_saved_error_triple(ERRDOS, ERRfilexists,
+ NT_STATUS_OBJECT_NAME_COLLISION);
+ return NULL;
+ }
+ create_dir = True;
+ info = FILE_WAS_CREATED;
+ break;
+
+ case FILE_OPEN_IF:
+ /* If directory exists open. If directory doesn't
+ * exist create. */
+ if (!dir_existed) {
+ create_dir = True;
+ info = FILE_WAS_CREATED;
+ } else {
+ info = FILE_WAS_OPENED;
+ }
+ break;
+
+ case FILE_SUPERSEDE:
+ case FILE_OVERWRITE:
+ case FILE_OVERWRITE_IF:
+ default:
+ DEBUG(5,("open_directory: invalid create_disposition "
+ "0x%x for directory %s\n",
+ (unsigned int)create_disposition, fname));
+ file_free(fsp);
+ set_saved_ntstatus(NT_STATUS_INVALID_PARAMETER);
+ return NULL;
+ }
+
+ if (create_dir) {
+ /*
+ * Try and create the directory.
+ */
+
+ /* We know bad_path is false as it's caught earlier. */
+
+ status = mkdir_internal(conn, fname, False);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,("open_directory: unable to create %s. "
+ "Error was %s\n", fname, strerror(errno) ));
+ /* Ensure we return the correct NT status to the
+ * client. */
+ set_saved_error_triple(0, 0, status);
+ return NULL;
+ }
+
+ /* Ensure we're checking for a symlink here.... */
+ /* We don't want to get caught by a symlink racer. */
+
+ if(SMB_VFS_LSTAT(conn,fname, psbuf) != 0) {
+ return NULL;
+ }
+
+ if(!S_ISDIR(psbuf->st_mode)) {
+ DEBUG(0,("open_directory: %s is not a directory !\n",
+ fname ));
+ return NULL;
+ }
+ }
+
+ fsp = file_new(conn);
+ if(!fsp) {
+ return NULL;
+ }
+
+ /*
+ * Setup the files_struct for it.
+ */
+
+ fsp->mode = psbuf->st_mode;
+ fsp->inode = psbuf->st_ino;
+ fsp->dev = psbuf->st_dev;
+ fsp->vuid = current_user.vuid;
+ fsp->file_pid = global_smbpid;
+ fsp->can_lock = True;
+ fsp->can_read = False;
+ fsp->can_write = False;
+
+ fsp->share_access = share_access;
+ fsp->fh->private_options = create_options;
+ fsp->access_mask = access_mask;
+
+ fsp->print_file = False;
+ fsp->modified = False;
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+ fsp->is_directory = True;
+ fsp->is_stat = False;
+ string_set(&fsp->fsp_name,fname);
+
+ lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode,
+ conn->connectpath,
+ fname);
+
+ if (lck == NULL) {
+ DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
+ file_free(fsp);
+ set_saved_ntstatus(NT_STATUS_SHARING_VIOLATION);
+ return NULL;
+ }
+
+ status = open_mode_check(conn, fname, lck,
+ access_mask, share_access,
+ create_options, &dir_existed);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ set_saved_ntstatus(status);
+ talloc_free(lck);
+ file_free(fsp);
+ return NULL;
+ }
+
+ set_share_mode(lck, fsp, 0, NO_OPLOCK);
+
+ if (create_options & FILE_DELETE_ON_CLOSE) {
+ status = can_set_delete_on_close(fsp, True, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ set_saved_ntstatus(status);
+ talloc_free(lck);
+ file_free(fsp);
+ return NULL;
+ }
+
+ lck->delete_on_close = True;
+ lck->modified = True;
+ }
+
+ talloc_free(lck);
+
+ /* Change the owner if required. */
+ if ((info == FILE_WAS_CREATED) && lp_inherit_owner(SNUM(conn))) {
+ change_owner_to_parent(conn, fsp, fsp->fsp_name, psbuf);
+ }
+
+ if (pinfo) {
+ *pinfo = info;
+ }
+
+ conn->num_files_open++;
+
+ return fsp;
+}
+
+/****************************************************************************
+ Open a pseudo-file (no locking checks - a 'stat' open).
+****************************************************************************/
+
+files_struct *open_file_stat(connection_struct *conn, char *fname,
+ SMB_STRUCT_STAT *psbuf)
+{
+ files_struct *fsp = NULL;
+
+ if (!VALID_STAT(*psbuf))
+ return NULL;
+
+ /* Can't 'stat' open directories. */
+ if(S_ISDIR(psbuf->st_mode))
+ return NULL;
+
+ fsp = file_new(conn);
+ if(!fsp)
+ return NULL;
+
+ DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
+
+ /*
+ * Setup the files_struct for it.
+ */
+
+ fsp->mode = psbuf->st_mode;
+ fsp->inode = psbuf->st_ino;
+ fsp->dev = psbuf->st_dev;
+ fsp->vuid = current_user.vuid;
+ fsp->file_pid = global_smbpid;
+ fsp->can_lock = False;
+ fsp->can_read = False;
+ fsp->can_write = False;
+ fsp->print_file = False;
+ fsp->modified = False;
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+ fsp->is_directory = False;
+ fsp->is_stat = True;
+ string_set(&fsp->fsp_name,fname);
+
+ conn->num_files_open++;
+
+ return fsp;
+}
projects / samba / blobdiff