#include "includes.h"
extern userdom_struct current_user_info;
extern uint16 global_oplock_port;
extern uint16 global_smbpid;
extern BOOL global_client_failed_oplock_break;
struct dev_inode_bundle {
SMB_DEV_T dev;
SMB_INO_T inode;
};
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;
}
int fd_close(struct connection_struct *conn, files_struct *fsp)
{
if (fsp->fd == -1)
return 0;
return fd_close_posix(conn, fsp);
}
static void check_for_pipe(const char *fname)
{
char s[10];
StrnCpy(s,fname,sizeof(s)-1);
strlower_m(s);
if (strstr(s,"pipe/")) {
DEBUG(3,("Rejecting named pipe open for %s\n",fname));
unix_ERR_class = ERRSRV;
unix_ERR_code = ERRaccess;
unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
}
}
#ifdef WITH_BRLM
int map_deny_mode_to_brlm_permissions(files_struct *fsp, int flags)
{
int deny_mode = 0;
switch (flags) {
case DENY_ALL:
deny_mode = kBRLMDenyRead | kBRLMDenyWrite;
break;
case DENY_WRITE:
deny_mode = kBRLMDenyWrite;
break;
case DENY_READ:
deny_mode = kBRLMDenyRead;
break;
case DENY_DOS:
case DENY_FCB:
default:
deny_mode = 0;
break;
}
DEBUG(4,("map_deny_mode_to_brlm_permissions[0x%X] flags[0x%X]\n",deny_mode, flags));
fsp->brlm_deny_mode = deny_mode;
return deny_mode;
}
int map_open_mode_to_brlm_permissions(files_struct *fsp, int flags)
{
int open_mode = 0;
if (flags & DOS_OPEN_RDONLY) {
open_mode = kBRLMRead;
DEBUG(4,("map_open_mode_to_brlm_permissions: DOS_OPEN_RDONLY\n"));
} else if ( flags & DOS_OPEN_WRONLY) {
open_mode = kBRLMWrite;
} else if ( flags & DOS_OPEN_RDWR) {
open_mode = kBRLMRead | kBRLMWrite;
} else if ( flags & DOS_OPEN_FCB) {
open_mode = kBRLMRead;
} else {
open_mode = kBRLMRead;
DEBUG(4,("map_open_mode_to_brlm_permissions: !!! default open permissions - kBRLMRead flags[0x%X]\n", flags));
}
fsp->brlm_open_mode = open_mode;
DEBUG(4,("map_open_mode_to_brlm_permissions[0x%X] flags[0x%X]\n",open_mode, flags));
return open_mode;
}
#endif
static BOOL open_file(files_struct *fsp,connection_struct *conn,
const char *fname,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode, uint32 desired_access)
{
extern struct current_user current_user;
int accmode = (flags & O_ACCMODE);
int local_flags = flags;
#ifdef WITH_BRLM
BRLMStatus brlm_status = BRLMNoErr;
BRLMRef brlm_ref = 0;
#endif
fsp->fd = -1;
fsp->oplock_type = NO_OPLOCK;
errno = EPERM;
if (!CAN_WRITE(conn)) {
if(accmode != O_RDONLY) {
DEBUG(3,("Permission denied opening %s\n",fname));
check_for_pipe(fname);
return False;
} else if(flags & O_CREAT) {
flags &= ~O_CREAT;
local_flags &= ~O_CREAT;
}
}
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 ((desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
(local_flags & O_CREAT) || ((local_flags & O_TRUNC) == O_TRUNC) ) {
local_flags &= ~O_TRUNC;
#if defined(O_NONBLOCK) && defined(S_ISFIFO)
if (VALID_STAT(*psbuf) && S_ISFIFO(psbuf->st_mode))
local_flags |= O_NONBLOCK;
#endif
if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf) && ms_has_wild(fname)) {
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRinvalidname;
unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
return False;
}
#ifdef WITH_BRLM
if (lp_BRLM())
{
map_open_mode_to_brlm_permissions(fsp, local_flags);
brlm_status = BRLMPosixOpen(fname, kBRLMDataFork, fsp->brlm_deny_mode | fsp->brlm_open_mode, local_flags & ~O_ACCMODE, mode, &brlm_ref, 0 , 0 );
fsp->brlm_ref = brlm_ref;
if (BRLMNoErr == brlm_status) {
fsp->fd = BRLMGetDescriptor(brlm_ref);
} else {
if (BRLMOpenDenied == brlm_status || BRLMLockConflict == brlm_status) {
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
}
fsp->fd = -1;
DEBUG(3,("open_file: [%d]BRLMPosixOpen file (%s) (brlm_perms=0x%X) (local_flags=0x%X) (mode=%d) (fd=%d) (brlm_ref=%X)\n", brlm_status, fname, fsp->brlm_deny_mode | fsp->brlm_open_mode, local_flags & ~O_ACCMODE, mode, fsp->fd, brlm_ref));
}
} else {
#endif
fsp->fd = fd_open(conn, fname, local_flags, mode);
#ifdef WITH_BRLM
}
#endif
if (fsp->fd == -1) {
DEBUG(3,("Error opening file %s (%s) (local_flags=%d) (flags=%d)\n",
fname,strerror(errno),local_flags,flags));
check_for_pipe(fname);
return False;
}
if ((local_flags & O_CREAT) && !VALID_STAT(*psbuf))
inherit_access_acl(conn, fname, mode);
} else
fsp->fd = -1;
if (!VALID_STAT(*psbuf)) {
int ret;
if (fsp->fd == -1)
ret = SMB_VFS_STAT(conn, fname, psbuf);
else {
ret = SMB_VFS_FSTAT(fsp,fsp->fd,psbuf);
if (ret == -1)
DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) ));
}
if (ret == -1) {
fd_close(conn, fsp);
return False;
}
}
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->size = psbuf->st_size;
fsp->can_lock = True;
fsp->can_read = ((flags & O_WRONLY)==0);
fsp->can_write = ((flags & (O_WRONLY|O_RDWR))!=0);
fsp->share_mode = 0;
fsp->desired_access = desired_access;
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 = False;
fsp->directory_delete_on_close = False;
string_set(&fsp->fsp_name,fname);
fsp->wcp = NULL;
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;
}
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;
}
enum {AFAIL,AREAD,AWRITE,AALL};
static int access_table(int new_deny,int old_deny,int old_mode,
BOOL same_pid, BOOL isexe)
{
if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL);
if (same_pid) {
if (isexe && old_mode == DOS_OPEN_RDONLY &&
old_deny == DENY_DOS && new_deny == DENY_READ) {
return AFAIL;
}
if (!isexe && old_mode == DOS_OPEN_RDONLY &&
old_deny == DENY_DOS && new_deny == DENY_DOS) {
return AREAD;
}
if (new_deny == DENY_FCB && old_deny == DENY_DOS) {
if (isexe) return AFAIL;
if (old_mode == DOS_OPEN_RDONLY) return AFAIL;
return AALL;
}
if (old_mode == DOS_OPEN_RDONLY && old_deny == DENY_DOS) {
if (new_deny == DENY_FCB || new_deny == DENY_READ) {
if (isexe) return AREAD;
return AFAIL;
}
}
if (old_deny == DENY_FCB) {
if (new_deny == DENY_DOS || new_deny == DENY_FCB) return AALL;
return AFAIL;
}
}
if (old_deny == DENY_DOS || new_deny == DENY_DOS ||
old_deny == DENY_FCB || new_deny == DENY_FCB) {
if (isexe) {
if (old_deny == DENY_FCB || new_deny == DENY_FCB) {
return AFAIL;
}
if (old_deny == DENY_DOS) {
if (new_deny == DENY_READ &&
(old_mode == DOS_OPEN_RDONLY ||
old_mode == DOS_OPEN_RDWR)) {
return AFAIL;
}
if (new_deny == DENY_WRITE &&
(old_mode == DOS_OPEN_WRONLY ||
old_mode == DOS_OPEN_RDWR)) {
return AFAIL;
}
return AALL;
}
if (old_deny == DENY_NONE) return AALL;
if (old_deny == DENY_READ) return AWRITE;
if (old_deny == DENY_WRITE) return AREAD;
}
if (old_deny == new_deny && same_pid)
return(AALL);
if (old_deny == DENY_READ || new_deny == DENY_READ) return AFAIL;
if (old_mode == DOS_OPEN_RDONLY) return(AREAD);
return(AFAIL);
}
switch (new_deny)
{
case DENY_WRITE:
if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_RDONLY) return(AREAD);
if (old_deny==DENY_READ && old_mode==DOS_OPEN_RDONLY) return(AWRITE);
if (old_deny==DENY_NONE && old_mode==DOS_OPEN_RDONLY) return(AALL);
return(AFAIL);
case DENY_READ:
if (old_deny==DENY_WRITE && old_mode==DOS_OPEN_WRONLY) return(AREAD);
if (old_deny==DENY_READ && old_mode==DOS_OPEN_WRONLY) return(AWRITE);
if (old_deny==DENY_NONE && old_mode==DOS_OPEN_WRONLY) return(AALL);
return(AFAIL);
case DENY_NONE:
if (old_deny==DENY_WRITE) return(AREAD);
if (old_deny==DENY_READ) return(AWRITE);
if (old_deny==DENY_NONE) return(AALL);
return(AFAIL);
}
return(AFAIL);
}
static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode, uint32 desired_access,
const char *fname, BOOL fcbopen, int *flags)
{
int deny_mode = GET_DENY_MODE(share_mode);
int old_open_mode = GET_OPEN_MODE(share->share_mode);
int old_deny_mode = GET_DENY_MODE(share->share_mode);
BOOL non_io_open_request;
BOOL non_io_open_existing;
if(!lp_share_modes(SNUM(conn)))
return True;
if (desired_access & ~(SYNCHRONIZE_ACCESS|READ_CONTROL_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES)) {
non_io_open_request = False;
} else {
non_io_open_request = True;
}
if (share->desired_access & ~(SYNCHRONIZE_ACCESS|READ_CONTROL_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES)) {
non_io_open_existing = False;
} else {
non_io_open_existing = True;
}
if (GET_DELETE_ON_CLOSE_FLAG(share->share_mode)) {
DEBUG(5,("check_share_mode: Failing open on file %s as delete on close flag is set.\n",
fname ));
unix_ERR_class = SMB_SUCCESS;
unix_ERR_code = 0;
unix_ERR_ntstatus = NT_STATUS_OK;
return False;
}
if (non_io_open_request && non_io_open_existing) {
if ((desired_access & DELETE_ACCESS) && (share->desired_access & DELETE_ACCESS) &&
(!GET_ALLOW_SHARE_DELETE(share->share_mode) || !GET_ALLOW_SHARE_DELETE(share_mode))) {
DEBUG(5,("check_share_mode: Failing open on file %s as delete access requests conflict.\n",
fname ));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return False;
}
DEBUG(5,("check_share_mode: Allowing open on file %s as both desired access (0x%x) \
and existing desired access (0x%x) are non-data opens\n",
fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
return True;
} else if (non_io_open_request || non_io_open_existing) {
DEBUG(5,("check_share_mode: One non-io open. Allowing open on file %s as desired access (0x%x) doesn't conflict with\
existing desired access (0x%x).\n", fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
return True;
}
if ((desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share->share_mode)) {
DEBUG(5,("check_share_mode: Failing open on file %s as delete access requested and allow share delete not set.\n",
fname ));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return False;
}
if ((share->desired_access & DELETE_ACCESS) && !GET_ALLOW_SHARE_DELETE(share_mode)) {
DEBUG(5,("check_share_mode: Failing open on file %s as delete access granted and allow share delete not requested.\n",
fname ));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return False;
}
if ( !(desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
!(share->desired_access & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ) {
DEBUG(5,("check_share_mode: Allowing open on file %s as desired access (0x%x) doesn't conflict with\
existing desired access (0x%x).\n", fname, (unsigned int)desired_access, (unsigned int)share->desired_access ));
return True;
}
{
int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode,
(share->pid == sys_getpid()),is_executable(fname));
if ((access_allowed == AFAIL) ||
(!fcbopen && (access_allowed == AREAD && *flags == O_RDWR)) ||
(access_allowed == AREAD && *flags != O_RDONLY) ||
(access_allowed == AWRITE && *flags != O_WRONLY)) {
DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s,fcbopen = %d, flags = %d) = %d\n",
deny_mode,old_deny_mode,old_open_mode,
(int)share->pid,fname, fcbopen, *flags, access_allowed));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return False;
}
if (access_allowed == AREAD)
*flags = O_RDONLY;
if (access_allowed == AWRITE)
*flags = O_WRONLY;
}
return True;
}
#if defined(DEVELOPER)
static void validate_my_share_entries(int num, share_mode_entry *share_entry)
{
files_struct *fsp;
if (share_entry->pid != sys_getpid())
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 (((uint16)fsp->oplock_type) != share_entry->op_type) {
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
struct share_mode_entry_list {
struct share_mode_entry_list *next, *prev;
share_mode_entry entry;
};
static void free_broken_entry_list(struct share_mode_entry_list *broken_entry_list)
{
while (broken_entry_list) {
struct share_mode_entry_list *broken_entry = broken_entry_list;
DLIST_REMOVE(broken_entry_list, broken_entry);
SAFE_FREE(broken_entry);
}
}
static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev,
SMB_INO_T inode,
uint32 desired_access,
int share_mode, int *p_flags, int *p_oplock_request,
BOOL *p_all_current_opens_are_level_II)
{
int i;
int num_share_modes;
int oplock_contention_count = 0;
share_mode_entry *old_shares = NULL;
BOOL fcbopen = False;
BOOL broke_oplock;
if(GET_OPEN_MODE(share_mode) == DOS_OPEN_FCB)
fcbopen = True;
num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
if(num_share_modes == 0) {
SAFE_FREE(old_shares);
return 0;
}
if (desired_access && ((desired_access & ~(SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES))==0) &&
((desired_access & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES)) != 0)) {
SAFE_FREE(old_shares);
return num_share_modes;
}
do {
struct share_mode_entry_list *broken_entry_list = NULL;
struct share_mode_entry_list *broken_entry = NULL;
broke_oplock = False;
*p_all_current_opens_are_level_II = True;
for(i = 0; i < num_share_modes; i++) {
BOOL cause_oplock_break = False;
share_mode_entry *share_entry = &old_shares[i];
#if defined(DEVELOPER)
validate_my_share_entries(i, share_entry);
#endif
if (!*p_oplock_request && desired_access == DELETE_ACCESS &&
!BATCH_OPLOCK_TYPE(share_entry->op_type)) {
cause_oplock_break = False;
} else if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) ||
(!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) {
cause_oplock_break = True;
}
if(cause_oplock_break) {
BOOL opb_ret;
DEBUG(5,("open_mode_check: oplock_request = %d, breaking oplock (%x) on file %s, \
dev = %x, inode = %.0f\n", *p_oplock_request, share_entry->op_type, fname, (unsigned int)dev, (double)inode));
srv_defer_sign_response(get_current_mid());
unlock_share_entry(conn, dev, inode);
opb_ret = request_oplock_break(share_entry, False);
lock_share_entry(conn, dev, inode);
if(opb_ret == False) {
DEBUG(0,("open_mode_check: FAILED when breaking oplock (%x) on file %s, \
dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode));
SAFE_FREE(old_shares);
errno = EACCES;
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return -1;
}
broken_entry = SMB_MALLOC_P(struct share_mode_entry_list);
if (!broken_entry) {
smb_panic("open_mode_check: malloc fail.\n");
}
broken_entry->entry = *share_entry;
DLIST_ADD(broken_entry_list, broken_entry);
broke_oplock = True;
} else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
*p_all_current_opens_are_level_II = False;
}
}
if (broke_oplock) {
SAFE_FREE(old_shares);
num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
}
for(i = 0; i < num_share_modes; i++) {
share_mode_entry *share_entry = &old_shares[i];
if (!check_share_mode(conn, share_entry, share_mode, desired_access,
fname, fcbopen, p_flags)) {
SAFE_FREE(old_shares);
free_broken_entry_list(broken_entry_list);
errno = EACCES;
return -1;
}
}
for(broken_entry = broken_entry_list; broken_entry; broken_entry = broken_entry->next) {
oplock_contention_count++;
for(i = 0; i < num_share_modes; i++) {
share_mode_entry *share_entry = &old_shares[i];
if (share_modes_identical(&broken_entry->entry, share_entry) &&
EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) {
DEBUG(0,("open_mode_check: exlusive oplock left by process %d \
after break ! For file %s, dev = %x, inode = %.0f. Deleting it to continue...\n",
(int)broken_entry->entry.pid, fname, (unsigned int)dev, (double)inode));
if (process_exists(broken_entry->entry.pid)) {
DEBUG(0,("open_mode_check: Existent process %lu left active oplock.\n",
(unsigned long)broken_entry->entry.pid ));
}
if (del_share_entry(dev, inode, &broken_entry->entry, NULL) == -1) {
free_broken_entry_list(broken_entry_list);
errno = EACCES;
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return -1;
}
SAFE_FREE(old_shares);
num_share_modes = get_share_modes(conn, dev, inode, &old_shares);
break;
}
}
}
free_broken_entry_list(broken_entry_list);
} while(broke_oplock);
if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) {
*p_oplock_request = 0;
DEBUG(4,("open_mode_check: oplock contention = %d. Not granting oplock.\n",
oplock_contention_count ));
}
SAFE_FREE(old_shares);
return num_share_modes;
}
static void delete_defered_open_entry_record(connection_struct *conn, SMB_DEV_T dev, SMB_INO_T inode)
{
uint16 mid = get_current_mid();
pid_t mypid = sys_getpid();
deferred_open_entry *de_array = NULL;
int num_de_entries, i;
if (!lp_defer_sharing_violations()) {
return;
}
num_de_entries = get_deferred_opens(conn, dev, inode, &de_array);
for (i = 0; i < num_de_entries; i++) {
deferred_open_entry *entry = &de_array[i];
if (entry->pid == mypid && entry->mid == mid && entry->dev == dev &&
entry->inode == inode) {
delete_deferred_open_entry(entry);
SAFE_FREE(de_array);
return;
}
}
SAFE_FREE(de_array);
}
void defer_open_sharing_error(connection_struct *conn, struct timeval *ptv,
char *fname, SMB_DEV_T dev, SMB_INO_T inode)
{
uint16 mid = get_current_mid();
pid_t mypid = sys_getpid();
deferred_open_entry *de_array = NULL;
int num_de_entries, i;
struct dev_inode_bundle dib;
if (!lp_defer_sharing_violations()) {
return;
}
dib.dev = dev;
dib.inode = inode;
num_de_entries = get_deferred_opens(conn, dev, inode, &de_array);
for (i = 0; i < num_de_entries; i++) {
deferred_open_entry *entry = &de_array[i];
if (entry->pid == mypid && entry->mid == mid) {
if (usec_time_diff(ptv, &entry->time) > SHARING_VIOLATION_USEC_WAIT) {
DEBUG(10,("defer_open_sharing_error: Deleting deferred open entry for mid %u, \
file %s\n",
(unsigned int)mid, fname ));
delete_deferred_open_entry(entry);
SAFE_FREE(de_array);
return;
}
DEBUG(10,("defer_open_sharing_error: time [%u.%06u] updating \
deferred open entry for mid %u, file %s\n",
(unsigned int)entry->time.tv_sec,
(unsigned int)entry->time.tv_usec,
(unsigned int)mid, fname ));
push_sharing_violation_open_smb_message(&entry->time, (char *)&dib, sizeof(dib));
SAFE_FREE(de_array);
return;
}
}
DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred open entry for mid %u, file %s\n",
(unsigned int)ptv->tv_sec, (unsigned int)ptv->tv_usec, (unsigned int)mid, fname ));
if (!push_sharing_violation_open_smb_message(ptv, (char *)&dib, sizeof(dib))) {
SAFE_FREE(de_array);
return;
}
if (!add_deferred_open(mid, ptv, dev, inode, global_oplock_port, fname)) {
remove_sharing_violation_open_smb_message(mid);
}
srv_defer_sign_response(mid);
SAFE_FREE(de_array);
}
static void kernel_flock(files_struct *fsp, int deny_mode)
{
#if HAVE_KERNEL_SHARE_MODES
int kernel_mode = 0;
if (deny_mode == DENY_READ) kernel_mode = LOCK_MAND|LOCK_WRITE;
else if (deny_mode == DENY_WRITE) kernel_mode = LOCK_MAND|LOCK_READ;
else if (deny_mode == DENY_ALL) kernel_mode = LOCK_MAND;
if (kernel_mode) flock(fsp->fd, kernel_mode);
#endif
;;
}
static BOOL open_match_attributes(connection_struct *conn, const char *path, uint32 old_dos_mode, uint32 new_dos_mode,
mode_t existing_mode, mode_t new_mode, mode_t *returned_mode)
{
uint32 noarch_old_dos_mode, noarch_new_dos_mode;
noarch_old_dos_mode = (old_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);
noarch_new_dos_mode = (new_dos_mode & ~FILE_ATTRIBUTE_ARCHIVE);
if((noarch_old_dos_mode == 0 && noarch_new_dos_mode != 0) ||
(noarch_old_dos_mode != 0 && ((noarch_old_dos_mode & noarch_new_dos_mode) == noarch_old_dos_mode)))
*returned_mode = new_mode;
else
*returned_mode = (mode_t)0;
DEBUG(10,("open_match_attributes: file %s old_dos_mode = 0x%x, existing_mode = 0%o, new_dos_mode = 0x%x returned_mode = 0%o\n",
path,
old_dos_mode, (unsigned int)existing_mode, new_dos_mode, (unsigned int)*returned_mode ));
if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
if ((old_dos_mode & FILE_ATTRIBUTE_SYSTEM) && !(new_dos_mode & FILE_ATTRIBUTE_SYSTEM))
return False;
}
if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
if ((old_dos_mode & FILE_ATTRIBUTE_HIDDEN) && !(new_dos_mode & FILE_ATTRIBUTE_HIDDEN))
return False;
}
return True;
}
files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
int share_mode,int ofun, uint32 new_dos_mode, int oplock_request,
int *Access,int *action)
{
return open_file_shared1(conn, fname, psbuf, 0, share_mode, ofun, new_dos_mode,
oplock_request, Access, action);
}
files_struct *open_file_shared1(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf,
uint32 desired_access,
int share_mode,int ofun, uint32 new_dos_mode,
int oplock_request,
int *Access,int *paction)
{
int flags=0;
int flags2=0;
int deny_mode = GET_DENY_MODE(share_mode);
BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode);
BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
BOOL file_existed = VALID_STAT(*psbuf);
BOOL fcbopen = False;
BOOL def_acl = False;
BOOL add_share_mode = True;
BOOL internal_only_open = False;
SMB_DEV_T dev = 0;
SMB_INO_T inode = 0;
int num_share_modes = 0;
BOOL all_current_opens_are_level_II = False;
BOOL fsp_open = False;
files_struct *fsp = NULL;
int open_mode=0;
uint16 port = 0;
mode_t new_mode = (mode_t)0;
int action;
uint32 existing_dos_mode = 0;
struct pending_message_list *pml = NULL;
uint16 mid = get_current_mid();
mode_t mode = unix_mode(conn,new_dos_mode | aARCH,fname);
if (oplock_request == INTERNAL_OPEN_ONLY) {
internal_only_open = True;
oplock_request = 0;
}
if ((pml = get_open_deferred_message(mid)) != NULL) {
struct dev_inode_bundle dib;
memcpy(&dib, pml->private_data.data, sizeof(dib));
if (!file_existed || dib.dev != psbuf->st_dev || dib.inode != psbuf->st_ino ||
pml->msg_time.tv_sec || pml->msg_time.tv_usec) {
remove_sharing_violation_open_smb_message(mid);
lock_share_entry(conn, dib.dev, dib.inode);
delete_defered_open_entry_record(conn, dib.dev, dib.inode);
unlock_share_entry(conn, dib.dev, dib.inode);
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return NULL;
}
remove_sharing_violation_open_smb_message(mid);
}
if (conn->printer) {
if (Access)
*Access = DOS_OPEN_WRONLY;
if (paction)
*paction = FILE_WAS_CREATED;
return print_fsp_open(conn, fname);
}
fsp = file_new(conn);
if(!fsp)
return NULL;
DEBUG(10,("open_file_shared: fname = %s, dos_attrs = %x, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n",
fname, new_dos_mode, share_mode, ofun, (int)mode, oplock_request ));
if (!check_name(fname,conn)) {
file_free(fsp);
return NULL;
}
new_dos_mode &= SAMBA_ATTRIBUTES_MASK;
if (file_existed) {
existing_dos_mode = dos_mode(conn, fname, psbuf);
}
if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) {
oplock_request = 0;
}
if (strstr(fname,".+,;=[].")) {
unix_ERR_class = ERRDOS;
#if 1
unix_ERR_code = ERRcannotopen;
#else
unix_ERR_code = ERROR_EAS_NOT_SUPPORTED;
#endif
DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n"));
file_free(fsp);
return NULL;
}
if ((GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) && file_existed) {
DEBUG(5,("open_file_shared: create new requested for file %s and file already exists.\n",
fname ));
file_free(fsp);
if (S_ISDIR(psbuf->st_mode)) {
errno = EISDIR;
} else {
errno = EEXIST;
}
return NULL;
}
if (CAN_WRITE(conn) && (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST))
flags2 |= O_CREAT;
if (CAN_WRITE(conn) && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE))
flags2 |= O_TRUNC;
if (file_existed && (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE)) {
if (!open_match_attributes(conn, fname, existing_dos_mode, new_dos_mode,
psbuf->st_mode, mode, &new_mode)) {
DEBUG(5,("open_file_shared: attributes missmatch for file %s (%x %x) (0%o, 0%o)\n",
fname, existing_dos_mode, new_dos_mode,
(int)psbuf->st_mode, (int)mode ));
file_free(fsp);
errno = EACCES;
return NULL;
}
}
if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL)
flags2 |= O_EXCL;
switch (GET_OPEN_MODE(share_mode)) {
case DOS_OPEN_WRONLY:
flags = O_WRONLY;
if (desired_access == 0)
desired_access = FILE_WRITE_DATA;
break;
case DOS_OPEN_FCB:
fcbopen = True;
flags = O_RDWR;
if (desired_access == 0)
desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
break;
case DOS_OPEN_RDWR:
flags = O_RDWR;
if (desired_access == 0)
desired_access = FILE_READ_DATA|FILE_WRITE_DATA;
break;
default:
flags = O_RDONLY;
if (desired_access == 0)
desired_access = FILE_READ_DATA;
break;
}
#if defined(O_SYNC)
if (GET_FILE_SYNC_OPENMODE(share_mode)) {
flags2 |= O_SYNC;
}
#endif
if (flags != O_RDONLY && file_existed &&
(!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_mode))) {
if (!fcbopen) {
DEBUG(5,("open_file_shared: read/write access requested for file %s on read only %s\n",
fname, !CAN_WRITE(conn) ? "share" : "file" ));
file_free(fsp);
errno = EACCES;
return NULL;
}
flags = O_RDONLY;
}
if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) {
DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname));
file_free(fsp);
errno = EINVAL;
return NULL;
}
if (desired_access && ((desired_access & ~(SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES))==0) &&
((desired_access & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES)) != 0)) {
deny_mode = DENY_NONE;
if (file_existed) {
oplock_request = 0;
add_share_mode = False;
flags2 &= ~O_CREAT;
}
}
#ifdef WITH_BRLM
if (lp_BRLM())
map_deny_mode_to_brlm_permissions(fsp, deny_mode);
#endif
if (file_existed) {
dev = psbuf->st_dev;
inode = psbuf->st_ino;
lock_share_entry(conn, dev, inode);
num_share_modes = open_mode_check(conn, fname, dev, inode,
desired_access,
share_mode,
&flags, &oplock_request, &all_current_opens_are_level_II);
if(num_share_modes == -1) {
errno = 0;
fsp_open = open_file(fsp,conn,fname,psbuf,
flags|(flags2&~(O_TRUNC|O_CREAT)),mode,desired_access);
DEBUG(4,("open_file_shared : 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)),(int)mode,(int)fsp_open ));
if (!fsp_open && errno) {
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRnoaccess;
unix_ERR_ntstatus = NT_STATUS_ACCESS_DENIED;
}
if (!internal_only_open && NT_STATUS_EQUAL(unix_ERR_ntstatus,NT_STATUS_SHARING_VIOLATION)) {
defer_open_sharing_error(conn, &fsp->open_time, fname, dev, inode);
}
unlock_share_entry(conn, dev, inode);
if (fsp_open) {
fd_close(conn, fsp);
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
}
file_free(fsp);
return NULL;
}
}
if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
(def_acl = directory_has_default_acl(conn, parent_dirname(fname))))
mode = 0777;
DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n",
flags,flags2,(int)mode));
fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode,desired_access);
if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) {
if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode,desired_access)) == True)
flags = O_RDONLY;
}
if (!fsp_open) {
if(file_existed)
unlock_share_entry(conn, dev, inode);
file_free(fsp);
return NULL;
}
if (!file_existed) {
dev = fsp->dev;
inode = fsp->inode;
lock_share_entry_fsp(fsp);
num_share_modes = open_mode_check(conn, fname, dev, inode,
desired_access,
share_mode,
&flags, &oplock_request, &all_current_opens_are_level_II);
if(num_share_modes == -1) {
if (!internal_only_open && NT_STATUS_EQUAL(unix_ERR_ntstatus,NT_STATUS_SHARING_VIOLATION)) {
defer_open_sharing_error(conn, &fsp->open_time, fname, dev, inode);
}
unlock_share_entry_fsp(fsp);
fd_close(conn,fsp);
file_free(fsp);
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRbadshare;
unix_ERR_ntstatus = NT_STATUS_SHARING_VIOLATION;
return NULL;
}
if (num_share_modes > 0)
file_existed = True;
}
kernel_flock(fsp, deny_mode);
if (flags2&O_TRUNC) {
if ((SMB_VFS_FTRUNCATE(fsp,fsp->fd,0) == -1) || (SMB_VFS_FSTAT(fsp,fsp->fd,psbuf)==-1)) {
unlock_share_entry_fsp(fsp);
fd_close(conn,fsp);
file_free(fsp);
return NULL;
}
}
switch (flags) {
case O_RDONLY:
open_mode = DOS_OPEN_RDONLY;
break;
case O_RDWR:
open_mode = DOS_OPEN_RDWR;
break;
case O_WRONLY:
open_mode = DOS_OPEN_WRONLY;
break;
}
fsp->share_mode = SET_DENY_MODE(deny_mode) |
SET_OPEN_MODE(open_mode) |
SET_ALLOW_SHARE_DELETE(allow_share_delete);
DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode ));
if (Access) {
(*Access) = open_mode;
}
if (file_existed && !(flags2 & O_TRUNC))
action = FILE_WAS_OPENED;
if (file_existed && (flags2 & O_TRUNC))
action = FILE_WAS_OVERWRITTEN;
if (!file_existed)
action = FILE_WAS_CREATED;
if (paction) {
*paction = action;
}
if(oplock_request && (num_share_modes == 0) &&
!IS_VETO_OPLOCK_PATH(conn,fname) && set_file_oplock(fsp, oplock_request) ) {
port = global_oplock_port;
} else if (oplock_request && all_current_opens_are_level_II) {
port = global_oplock_port;
oplock_request = LEVEL_II_OPLOCK;
set_file_oplock(fsp, oplock_request);
} else {
port = 0;
oplock_request = 0;
}
if (add_share_mode) {
set_share_mode(fsp, port, oplock_request);
}
if (delete_on_close) {
uint32 dosmode = existing_dos_mode;
NTSTATUS result;
if (action == FILE_WAS_OVERWRITTEN || action == FILE_WAS_CREATED) {
dosmode = new_dos_mode;
}
result = set_delete_on_close_internal(fsp, delete_on_close, dosmode);
if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
uint8 u_e_c;
uint32 u_e_code;
if (add_share_mode) {
del_share_mode(fsp, NULL);
}
unlock_share_entry_fsp(fsp);
fd_close(conn,fsp);
file_free(fsp);
ntstatus_to_dos(result, &u_e_c, &u_e_code);
unix_ERR_ntstatus = result;
unix_ERR_class = u_e_c;
unix_ERR_code = u_e_code;
return NULL;
}
}
if (action == FILE_WAS_OVERWRITTEN || action == FILE_WAS_CREATED) {
if (lp_map_archive(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
file_set_dosmode(conn, fname, new_dos_mode | aARCH, NULL);
}
}
if (!file_existed && !def_acl) {
int saved_errno = errno;
if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, mode) == -1 && errno == ENOSYS)
errno = saved_errno;
} else if (new_mode) {
int ret = -1;
{
int saved_errno = errno;
ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fd, new_mode);
if (ret == -1 && errno == ENOSYS) {
errno = saved_errno;
} else {
DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
fname, (int)new_mode));
ret = 0;
}
}
if ((ret == -1) && (SMB_VFS_FCHMOD(fsp, fsp->fd, new_mode) == -1))
DEBUG(5, ("open_file_shared: failed to reset attributes of file %s to 0%o\n",
fname, (int)new_mode));
}
delete_defered_open_entry_record(conn, fsp->dev, fsp->inode);
unlock_share_entry_fsp(fsp);
conn->num_files_open++;
return fsp;
}
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;
fsp_open = open_file(fsp,conn,fname,psbuf,O_WRONLY,0,FILE_WRITE_DATA);
if (!fsp_open) {
file_free(fsp);
return NULL;
}
return fsp;
}
int close_file_fchmod(files_struct *fsp)
{
int ret = fd_close(fsp->conn, fsp);
file_free(fsp);
return ret;
}
files_struct *open_directory(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf,
uint32 desired_access, int share_mode, int smb_ofun, int *action)
{
extern struct current_user current_user;
BOOL got_stat = False;
files_struct *fsp = file_new(conn);
BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode);
if(!fsp)
return NULL;
if (VALID_STAT(*psbuf))
got_stat = True;
if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) {
file_free(fsp);
errno = EEXIST;
return NULL;
}
if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) {
if (got_stat) {
if(!S_ISDIR(psbuf->st_mode)) {
DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
file_free(fsp);
errno = EACCES;
return NULL;
}
*action = FILE_WAS_OPENED;
} else {
if(!CAN_WRITE(conn)) {
DEBUG(2,("open_directory: failing create on read-only share\n"));
file_free(fsp);
errno = EACCES;
return NULL;
}
if (ms_has_wild(fname)) {
file_free(fsp);
DEBUG(5,("open_directory: failing create on filename %s with wildcards\n", fname));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRinvalidname;
unix_ERR_ntstatus = NT_STATUS_OBJECT_NAME_INVALID;
return NULL;
}
if( strchr_m(fname, ':')) {
file_free(fsp);
DEBUG(5,("open_directory: failing create on filename %s with colon in name\n", fname));
unix_ERR_class = ERRDOS;
unix_ERR_code = ERRinvalidname;
unix_ERR_ntstatus = NT_STATUS_NOT_A_DIRECTORY;
return NULL;
}
if(vfs_MkDir(conn,fname, unix_mode(conn,aDIR, fname)) < 0) {
DEBUG(2,("open_directory: unable to create %s. Error was %s\n",
fname, strerror(errno) ));
file_free(fsp);
return NULL;
}
if(SMB_VFS_STAT(conn,fname, psbuf) != 0) {
file_free(fsp);
return NULL;
}
*action = FILE_WAS_CREATED;
}
} else {
if(!got_stat) {
DEBUG(3,("open_directory: unable to stat name = %s. Error was %s\n",
fname, strerror(errno) ));
file_free(fsp);
return NULL;
}
if(!S_ISDIR(psbuf->st_mode)) {
DEBUG(0,("open_directory: %s is not a directory !\n", fname ));
file_free(fsp);
return NULL;
}
*action = FILE_WAS_OPENED;
}
DEBUG(5,("open_directory: opening directory %s\n", fname));
fsp->mode = psbuf->st_mode;
fsp->inode = psbuf->st_ino;
fsp->dev = psbuf->st_dev;
fsp->size = psbuf->st_size;
fsp->vuid = current_user.vuid;
fsp->file_pid = global_smbpid;
fsp->can_lock = True;
fsp->can_read = False;
fsp->can_write = False;
fsp->share_mode = share_mode;
fsp->desired_access = desired_access;
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;
fsp->directory_delete_on_close = False;
string_set(&fsp->fsp_name,fname);
if (delete_on_close) {
NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close, 0);
if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) {
file_free(fsp);
return NULL;
}
}
conn->num_files_open++;
return fsp;
}
files_struct *open_file_stat(connection_struct *conn, char *fname, SMB_STRUCT_STAT *psbuf)
{
extern struct current_user current_user;
files_struct *fsp = NULL;
if (!VALID_STAT(*psbuf))
return NULL;
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));
fsp->mode = psbuf->st_mode;
fsp->inode = psbuf->st_ino;
fsp->dev = psbuf->st_dev;
fsp->size = psbuf->st_size;
fsp->vuid = current_user.vuid;
fsp->file_pid = global_smbpid;
fsp->can_lock = False;
fsp->can_read = False;
fsp->can_write = False;
fsp->share_mode = 0;
fsp->desired_access = 0;
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;
fsp->directory_delete_on_close = False;
string_set(&fsp->fsp_name,fname);
conn->num_files_open++;
return fsp;
}