X-Git-Url: http://git.samba.org/samba.git/?p=ira%2Fwip.git;a=blobdiff_plain;f=source3%2Fsmbd%2Fopen.c;h=b42c1bacc34dba2c96fae3a4284eea4494a7cfa7;hp=57fbdb24c434a3efdcee173ada5e575ff2626c9a;hb=68245b54cd561f362762a057d9b99ca43d0bf958;hpb=4e15be9cf1378149688f7a2744c1fe36a7f54f7e diff --git a/source3/smbd/open.c b/source3/smbd/open.c index 57fbdb24c43..b42c1bacc34 100644 --- a/source3/smbd/open.c +++ b/source3/smbd/open.c @@ -3,6 +3,7 @@ Version 1.9. file opening and share modes Copyright (C) Andrew Tridgell 1992-1998 + Copyright (C) Jeremy Allison 2001 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 @@ -21,276 +22,56 @@ #include "includes.h" -extern int DEBUGLEVEL; - -extern pstring sesssetup_user; +extern userdom_struct current_user_info; extern uint16 global_oplock_port; extern BOOL global_client_failed_oplock_break; /**************************************************************************** -fd support routines - attempt to do a dos_open + fd support routines - attempt to do a dos_open. ****************************************************************************/ -static int fd_attempt_open(char *fname, int flags, mode_t mode) +static int fd_open(struct connection_struct *conn, char *fname, + int flags, mode_t mode) { - int fd = dos_open(fname,flags,mode); - - /* Fix for files ending in '.' */ - if((fd == -1) && (errno == ENOENT) && - (strchr(fname,'.')==NULL)) - { - pstrcat(fname,"."); - fd = dos_open(fname,flags,mode); - } - -#if (defined(ENAMETOOLONG) && defined(HAVE_PATHCONF)) - if ((fd == -1) && (errno == ENAMETOOLONG)) - { - int max_len; - char *p = strrchr(fname, '/'); - - if (p == fname) /* name is "/xxx" */ - { - max_len = pathconf("/", _PC_NAME_MAX); - p++; - } - else if ((p == NULL) || (p == fname)) - { - p = fname; - max_len = pathconf(".", _PC_NAME_MAX); - } - else - { - *p = '\0'; - max_len = pathconf(fname, _PC_NAME_MAX); - *p = '/'; - p++; - } - if (strlen(p) > max_len) - { - char tmp = p[max_len]; - - p[max_len] = '\0'; - if ((fd = dos_open(fname,flags,mode)) == -1) - p[max_len] = tmp; - } - } + int fd; +#ifdef O_NONBLOCK + flags |= O_NONBLOCK; #endif - return fd; -} - -/**************************************************************************** -Cache a uid_t currently with this file open. This is an optimization only -used when multiple sessionsetup's have been done to one smbd. -****************************************************************************/ - -void fd_add_to_uid_cache(file_fd_struct *fd_ptr, uid_t u) -{ - if(fd_ptr->uid_cache_count >= sizeof(fd_ptr->uid_users_cache)/sizeof(uid_t)) - return; - fd_ptr->uid_users_cache[fd_ptr->uid_cache_count++] = u; -} - -/**************************************************************************** -Remove a uid_t that currently has this file open. This is an optimization only -used when multiple sessionsetup's have been done to one smbd. -****************************************************************************/ - -static void fd_remove_from_uid_cache(file_fd_struct *fd_ptr, uid_t u) -{ - int i; - for(i = 0; i < fd_ptr->uid_cache_count; i++) - if(fd_ptr->uid_users_cache[i] == u) { - if(i < (fd_ptr->uid_cache_count-1)) - memmove((char *)&fd_ptr->uid_users_cache[i], (char *)&fd_ptr->uid_users_cache[i+1], - sizeof(uid_t)*(fd_ptr->uid_cache_count-1-i) ); - fd_ptr->uid_cache_count--; - } - return; -} - -/**************************************************************************** -Check if a uid_t that currently has this file open is present. This is an -optimization only used when multiple sessionsetup's have been done to one smbd. -****************************************************************************/ - -static BOOL fd_is_in_uid_cache(file_fd_struct *fd_ptr, uid_t u) -{ - int i; - for(i = 0; i < fd_ptr->uid_cache_count; i++) - if(fd_ptr->uid_users_cache[i] == u) - return True; - return False; -} - -/**************************************************************************** -fd support routines - attempt to re-open an already open fd as O_RDWR. -Save the already open fd (we cannot close due to POSIX file locking braindamage. -****************************************************************************/ - -static void fd_attempt_reopen(char *fname, mode_t mode, file_fd_struct *fd_ptr) -{ - int fd = dos_open( fname, O_RDWR, mode); - - if(fd == -1) - return; - - if(fd_ptr->real_open_flags == O_RDONLY) - fd_ptr->fd_readonly = fd_ptr->fd; - if(fd_ptr->real_open_flags == O_WRONLY) - fd_ptr->fd_writeonly = fd_ptr->fd; - - fd_ptr->fd = fd; - fd_ptr->real_open_flags = O_RDWR; -} - -/**************************************************************************** -fd support routines - attempt to close the file referenced by this fd. -Decrements the ref_count and returns it. -****************************************************************************/ -uint16 fd_attempt_close(file_fd_struct *fd_ptr, int *err_ret) -{ - extern struct current_user current_user; - uint16 ret_ref = fd_ptr->ref_count; - - *err_ret = 0; - - DEBUG(3,("fd_attempt_close fd = %d, dev = %x, inode = %.0f, open_flags = %d, ref_count = %d.\n", - fd_ptr->fd, (unsigned int)fd_ptr->dev, (double)fd_ptr->inode, - fd_ptr->real_open_flags, - fd_ptr->ref_count)); - - SMB_ASSERT(fd_ptr->ref_count != 0); - - fd_ptr->ref_count--; - ret_ref = fd_ptr->ref_count; - - if(fd_ptr->ref_count == 0) { - - if(fd_ptr->fd != -1) { - if(close(fd_ptr->fd) < 0) - *err_ret = errno; - } +#ifdef O_NOFOLLOW + if (!lp_symlinks(SNUM(conn))) + flags |= O_NOFOLLOW; +#endif - if(fd_ptr->fd_readonly != -1) { - if(close(fd_ptr->fd_readonly) < 0) { - if(*err_ret == 0) - *err_ret = errno; - } - } + fd = conn->vfs_ops.open(conn,fname,flags,mode); - if(fd_ptr->fd_writeonly != -1) { - if( close(fd_ptr->fd_writeonly) < 0) { - if(*err_ret == 0) - *err_ret = errno; - } + /* Fix for files ending in '.' */ + if((fd == -1) && (errno == ENOENT) && + (strchr_m(fname,'.')==NULL)) { + pstrcat(fname,"."); + fd = conn->vfs_ops.open(conn,fname,flags,mode); } - /* - * Delete this fd_ptr. - */ - fd_ptr_free(fd_ptr); - } else { - fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid); - } + 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 ret_ref; + return fd; } /**************************************************************************** -fd support routines - check that current user has permissions -to open this file. Used when uid not found in optimization cache. -This is really ugly code, as due to POSIX locking braindamage we must -fork and then attempt to open the file, and return success or failure -via an exit code. + Close the file associated with a fsp. ****************************************************************************/ -static BOOL check_access_allowed_for_current_user( char *fname, int accmode ) +int fd_close(struct connection_struct *conn, files_struct *fsp) { - pid_t child_pid; - - /* - * We need to temporarily stop CatchChild from eating - * SIGCLD signals as it also eats the exit status code. JRA. - */ - - CatchChildLeaveStatus(); - - if((child_pid = fork()) < 0) { - DEBUG(0,("check_access_allowed_for_current_user: fork failed.\n")); - CatchChild(); - return False; - } - - if(child_pid) { - /* - * Parent. - */ - pid_t wpid; - int status_code; - - while ((wpid = sys_waitpid(child_pid, &status_code, 0)) < 0) { - if(errno == EINTR) { - errno = 0; - continue; - } - DEBUG(0,("check_access_allowed_for_current_user: The process \ -is no longer waiting ! Error = %s\n", strerror(errno) )); - CatchChild(); - return(False); - } - - /* - * Go back to ignoring children. - */ - CatchChild(); - - if (child_pid != wpid) { - DEBUG(0,("check_access_allowed_for_current_user: We were waiting for the wrong process ID\n")); - return(False); - } -#if defined(WIFEXITED) && defined(WEXITSTATUS) - if (WIFEXITED(status_code) == 0) { - DEBUG(0,("check_access_allowed_for_current_user: The process exited while we were waiting\n")); - return(False); - } - if (WEXITSTATUS(status_code) != 0) { - DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code)); - return(False); - } -#else /* defined(WIFEXITED) && defined(WEXITSTATUS) */ - if(status_code != 0) { - DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access denied.\n", status_code)); - return(False); - } -#endif /* defined(WIFEXITED) && defined(WEXITSTATUS) */ - - /* - * Success - the child could open the file. - */ - DEBUG(9,("check_access_allowed_for_current_user: The status of the process exiting was %d. Returning access allowed.\n", status_code)); - return True; - } else { - /* - * Child. - */ - int fd; - DEBUG(9,("check_access_allowed_for_current_user: Child - attempting to open %s with mode %d.\n", fname, accmode )); - if((fd = fd_attempt_open( fname, accmode, 0)) < 0) { - /* Access denied. */ - _exit(EACCES); - } - close(fd); - DEBUG(9,("check_access_allowed_for_current_user: Child - returning ok.\n")); - _exit(0); - } - - return False; + if (fsp->fd == -1) + return -1; + return fd_close_posix(conn, fsp); } + /**************************************************************************** -check a filename for the pipe string + Check a filename for the pipe string. ****************************************************************************/ static void check_for_pipe(char *fname) @@ -307,281 +88,129 @@ static void check_for_pipe(char *fname) } /**************************************************************************** -open a file + Open a file. ****************************************************************************/ -static void open_file(files_struct *fsp,connection_struct *conn, - char *fname1,int flags,mode_t mode, SMB_STRUCT_STAT *sbuf) +static BOOL open_file(files_struct *fsp,connection_struct *conn, + char *fname1,SMB_STRUCT_STAT *psbuf,int flags,mode_t mode) { - extern struct current_user current_user; - pstring fname; - SMB_STRUCT_STAT statbuf; - file_fd_struct *fd_ptr; - int accmode = (flags & O_ACCMODE); + extern struct current_user current_user; + pstring fname; + int accmode = (flags & O_ACCMODE); + int local_flags = flags; - fsp->open = False; - fsp->fd_ptr = 0; - fsp->oplock_type = NO_OPLOCK; - errno = EPERM; + fsp->fd = -1; + fsp->oplock_type = NO_OPLOCK; + errno = EPERM; - pstrcpy(fname,fname1); + pstrcpy(fname,fname1); - /* check permissions */ + /* 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. - */ + /* + * 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) && !conn->printer) { - /* It's a read-only share - fail if we wanted to write. */ - if(accmode != O_RDONLY) { - DEBUG(3,("Permission denied opening %s\n",fname)); - check_for_pipe(fname); - return; - } 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; - } - } + 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)); + check_for_pipe(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; + } + } - /* this handles a bug in Win95 - it doesn't say to create the file when it - should */ - if (conn->printer) { - flags |= (O_CREAT|O_EXCL); - } + /* + * 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." + * 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 (flags == O_WRONLY) - DEBUG(3,("Bug in client? Set O_WRONLY without O_CREAT\n")); -*/ + if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) + local_flags = (flags & ~O_ACCMODE)|O_RDWR; - /* - * Ensure we have a valid struct stat so we can search the - * open fd table. - */ - if(sbuf == 0) { - if(dos_stat(fname, &statbuf) < 0) { - if(errno != ENOENT) { - DEBUG(3,("Error doing stat on file %s (%s)\n", - fname,strerror(errno))); - - check_for_pipe(fname); - return; - } - sbuf = 0; - } else { - sbuf = &statbuf; - } - } + /* + * We can't actually truncate here as the file may be locked. + * open_file_shared will take care of the truncate later. JRA. + */ - /* - * Check to see if we have this file already - * open. If we do, just use the already open fd and increment the - * reference count (fd_get_already_open increments the ref_count). - */ - if((fd_ptr = fd_get_already_open(sbuf))!= 0) { - /* - * File was already open. - */ - - /* - * Check it wasn't open for exclusive use. - */ - if((flags & O_CREAT) && (flags & O_EXCL)) { - fd_ptr->ref_count--; - errno = EEXIST; - return; - } - - /* - * Ensure that the user attempting to open - * this file has permissions to do so, if - * the user who originally opened the file wasn't - * the same as the current user. - */ - - if(!fd_is_in_uid_cache(fd_ptr, (uid_t)current_user.uid)) { - if(!check_access_allowed_for_current_user( fname, accmode )) { - /* Error - permission denied. */ - DEBUG(3,("Permission denied opening file %s (flags=%d, accmode = %d)\n", - fname, flags, accmode)); - /* Ensure the ref_count is decremented. */ - fd_ptr->ref_count--; - fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid); - errno = EACCES; - return; - } - } - - fd_add_to_uid_cache(fd_ptr, (uid_t)current_user.uid); - - /* - * If not opened O_RDWR try - * and do that here - a chmod may have been done - * between the last open and now. - */ - if(fd_ptr->real_open_flags != O_RDWR) - fd_attempt_reopen(fname, mode, fd_ptr); - - /* - * Ensure that if we wanted write access - * it has been opened for write, and if we wanted read it - * was open for read. - */ - if(((accmode == O_WRONLY) && (fd_ptr->real_open_flags == O_RDONLY)) || - ((accmode == O_RDONLY) && (fd_ptr->real_open_flags == O_WRONLY)) || - ((accmode == O_RDWR) && (fd_ptr->real_open_flags != O_RDWR))) { - DEBUG(3,("Error opening (already open for flags=%d) file %s (%s) (flags=%d)\n", - fd_ptr->real_open_flags, fname,strerror(EACCES),flags)); - check_for_pipe(fname); - fd_remove_from_uid_cache(fd_ptr, (uid_t)current_user.uid); - fd_ptr->ref_count--; - return; - } - - } else { - int open_flags; - /* We need to allocate a new file_fd_struct (this increments the - ref_count). */ - if((fd_ptr = fd_get_new()) == 0) - return; - /* - * Whatever the requested flags, attempt read/write access, - * as we don't know what flags future file opens may require. - * If this fails, try again with the required flags. - * Even if we open read/write when only read access was - * requested the setting of the can_write flag in - * the file_struct will protect us from errant - * write requests. We never need to worry about O_APPEND - * as this is not set anywhere in Samba. - */ - fd_ptr->real_open_flags = O_RDWR; - /* Set the flags as needed without the read/write modes. */ - open_flags = flags & ~(O_RDWR|O_WRONLY|O_RDONLY); - fd_ptr->fd = fd_attempt_open(fname, open_flags|O_RDWR, mode); - /* - * On some systems opening a file for R/W access on a read only - * filesystems sets errno to EROFS. - */ -#ifdef EROFS - if((fd_ptr->fd == -1) && ((errno == EACCES) || (errno == EROFS))) { -#else /* No EROFS */ - if((fd_ptr->fd == -1) && (errno == EACCES)) { -#endif /* EROFS */ - if(accmode != O_RDWR) { - fd_ptr->fd = fd_attempt_open(fname, open_flags|accmode, mode); - fd_ptr->real_open_flags = accmode; - } - } - } + local_flags &= ~O_TRUNC; - if ((fd_ptr->fd >=0) && - conn->printer && lp_minprintspace(SNUM(conn))) { - pstring dname; - SMB_BIG_UINT dum1,dum2,dum3; - char *p; - pstrcpy(dname,fname); - p = strrchr(dname,'/'); - if (p) *p = 0; - if (sys_disk_free(dname,False,&dum1,&dum2,&dum3) < (SMB_BIG_UINT)lp_minprintspace(SNUM(conn))) { - int err; - if(fd_attempt_close(fd_ptr, &err) == 0) - dos_unlink(fname); - fsp->fd_ptr = 0; - errno = ENOSPC; - return; - } - } - - if (fd_ptr->fd < 0) - { - int err; - DEBUG(3,("Error opening file %s (%s) (flags=%d)\n", - fname,strerror(errno),flags)); - /* Ensure the ref_count is decremented. */ - fd_attempt_close(fd_ptr,&err); - check_for_pipe(fname); - return; - } + /* actually do the open */ + fsp->fd = fd_open(conn, fname, local_flags, mode); - if (fd_ptr->fd >= 0) - { - if(sbuf == 0) { - /* Do the fstat */ - if(sys_fstat(fd_ptr->fd, &statbuf) == -1) { - int err; - /* Error - backout !! */ - DEBUG(3,("Error doing fstat on fd %d, file %s (%s)\n", - fd_ptr->fd, fname,strerror(errno))); - /* Ensure the ref_count is decremented. */ - fd_attempt_close(fd_ptr,&err); - return; - } - sbuf = &statbuf; - } - - /* Set the correct entries in fd_ptr. */ - fd_ptr->dev = sbuf->st_dev; - fd_ptr->inode = sbuf->st_ino; - - fsp->fd_ptr = fd_ptr; - conn->num_files_open++; - fsp->mode = sbuf->st_mode; - GetTimeOfDay(&fsp->open_time); - fsp->vuid = current_user.vuid; - fsp->size = 0; - fsp->pos = -1; - fsp->open = True; - 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->print_file = conn->printer; - fsp->modified = False; - fsp->oplock_type = NO_OPLOCK; - fsp->sent_oplock_break = NO_BREAK_SENT; - fsp->is_directory = False; - fsp->stat_open = False; - fsp->directory_delete_on_close = False; - fsp->conn = conn; - /* - * Note that the file name here is the *untranslated* name - * ie. it is still in the DOS codepage sent from the client. - * All use of this filename will pass though the sys_xxxx - * functions which will do the dos_to_unix translation before - * mapping into a UNIX filename. JRA. - */ - string_set(&fsp->fsp_name,fname); - fsp->wbmpx_ptr = NULL; - fsp->wcp = NULL; /* Write cache pointer. */ - - /* - * If the printer is marked as postscript output a leading - * file identifier to ensure the file is treated as a raw - * postscript file. - * This has a similar effect as CtrlD=0 in WIN.INI file. - * tim@fsg.com 09/06/94 - */ - if (fsp->print_file && lp_postscript(SNUM(conn)) && fsp->can_write) { - DEBUG(3,("Writing postscript line\n")); - write_file(fsp,"%!\n",-1,3); - } - - DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n", - *sesssetup_user ? sesssetup_user : conn->user,fsp->fsp_name, - BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write), - conn->num_files_open)); + 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 (!VALID_STAT(*psbuf)) { + if (vfs_fstat(fsp,fsp->fd,psbuf) == -1) { + DEBUG(0,("Error doing fstat on open file %s (%s)\n", fname,strerror(errno) )); + 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->size = psbuf->st_size; + fsp->pos = -1; + 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->print_file = False; + fsp->modified = False; + fsp->oplock_type = NO_OPLOCK; + fsp->sent_oplock_break = NO_BREAK_SENT; + fsp->is_directory = False; + fsp->stat_open = False; + fsp->directory_delete_on_close = False; + fsp->conn = conn; + 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)); + + return True; } /**************************************************************************** @@ -590,38 +219,26 @@ static void open_file(files_struct *fsp,connection_struct *conn, Truncate a file after checking locking; close file if locked. **************************************************************************/ -static void truncate_unless_locked(files_struct *fsp, connection_struct *conn, int token, - BOOL *share_locked) +static int truncate_unless_locked(struct connection_struct *conn, files_struct *fsp) { - if (fsp->can_write){ - SMB_OFF_T mask2 = ((SMB_OFF_T)0x3) << (SMB_OFF_T_BITS-4); - SMB_OFF_T mask = (mask2<<2); - - if (is_locked(fsp,conn,~mask,0,WRITE_LOCK)){ - /* If share modes are in force for this connection we - have the share entry locked. Unlock it before closing. */ - if (*share_locked && lp_share_modes(SNUM(conn))) - unlock_share_entry( conn, fsp->fd_ptr->dev, - fsp->fd_ptr->inode); - close_file(fsp,False); - /* Share mode no longer locked. */ - *share_locked = False; - errno = EACCES; - unix_ERR_class = ERRDOS; - unix_ERR_code = ERRlock; - } else { - sys_ftruncate(fsp->fd_ptr->fd,0); - } + SMB_BIG_UINT mask = (SMB_BIG_UINT)-1; + + if (is_locked(fsp,fsp->conn,mask,0,WRITE_LOCK,True)){ + errno = EACCES; + unix_ERR_class = ERRDOS; + unix_ERR_code = ERRlock; + return -1; + } else { + return conn->vfs_ops.ftruncate(fsp,fsp->fd,0); } } - /******************************************************************* return True if the filename is one of the special executable types ********************************************************************/ -static BOOL is_executable(char *fname) +static BOOL is_executable(const char *fname) { - if ((fname = strrchr(fname,'.'))) { + if ((fname = strrchr_m(fname,'.'))) { if (strequal(fname,".com") || strequal(fname,".dll") || strequal(fname,".exe") || @@ -731,379 +348,618 @@ static int access_table(int new_deny,int old_deny,int old_mode, check if we can open a file with a share mode ****************************************************************************/ -static int check_share_mode( share_mode_entry *share, int deny_mode, - char *fname, - BOOL fcbopen, int *flags) +static BOOL check_share_mode(connection_struct *conn, share_mode_entry *share, int share_mode, + const char *fname, BOOL fcbopen, int *flags) { - int old_open_mode = GET_OPEN_MODE(share->share_mode); - int old_deny_mode = GET_DENY_MODE(share->share_mode); + 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); - /* - * Don't allow any open once the delete on close flag has been - * set. - */ + /* + * share modes = false means don't bother to check for + * DENY mode conflict. This is a *really* bad idea :-). JRA. + */ - 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 = ERRDOS; - unix_ERR_code = ERRnoaccess; - return False; - } + if(!lp_share_modes(SNUM(conn))) + return True; - { - int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode, - (share->pid == getpid()),is_executable(fname)); + /* + * Don't allow any opens once the delete on close flag has been + * set. + */ - 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)); + 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 = ERRDOS; + unix_ERR_code = ERRnoaccess; + return False; + } + + /* + * If delete access was requested and the existing share mode doesn't have + * ALLOW_SHARE_DELETE then deny. + */ + + if (GET_DELETE_ACCESS_REQUESTED(share_mode) && !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_class = ERRDOS; - unix_ERR_code = ERRbadshare; + return False; + } + + /* + * The inverse of the above. + * If delete access was granted and the new share mode doesn't have + * ALLOW_SHARE_DELETE then deny. + */ - return False; - } + if (GET_DELETE_ACCESS_REQUESTED(share->share_mode) && !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; - if (access_allowed == AREAD) - *flags = O_RDONLY; + return False; + } - if (access_allowed == AWRITE) - *flags = O_WRONLY; + { + 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; + + return False; + } + + if (access_allowed == AREAD) + *flags = O_RDONLY; - return True; + if (access_allowed == AWRITE) + *flags = O_WRONLY; + + } + + return True; } /**************************************************************************** -open a file with a share mode + Deal with open deny mode and oplock break processing. + Invarient: Share mode must be locked on entry and exit. + Returns -1 on error, or number of share modes on success (may be zero). ****************************************************************************/ -void open_file_shared(files_struct *fsp,connection_struct *conn,char *fname,int share_mode,int ofun, - mode_t mode,int oplock_request, int *Access,int *action) +static int open_mode_check(connection_struct *conn, const char *fname, SMB_DEV_T dev, + SMB_INO_T inode, int share_mode, int *p_flags, int *p_oplock_request, + BOOL *p_all_current_opens_are_level_II) { - int flags=0; - int flags2=0; - int deny_mode = GET_DENY_MODE(share_mode); - BOOL allow_share_delete = GET_ALLOW_SHARE_DELETE(share_mode); - SMB_STRUCT_STAT sbuf; - BOOL file_existed = dos_file_exist(fname,&sbuf); - BOOL share_locked = False; - BOOL fcbopen = False; - int token = 0; - SMB_DEV_T dev = 0; - SMB_INO_T inode = 0; - int num_share_modes = 0; - int oplock_contention_count = 0; - BOOL all_current_opens_are_level_II = False; - fsp->open = False; - fsp->fd_ptr = 0; - - DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n", - fname, share_mode, ofun, (int)mode, oplock_request )); - - - /* ignore any oplock requests if oplocks are disabled */ - if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) { - oplock_request = 0; - } + int i; + int num_share_modes; + int oplock_contention_count = 0; + share_mode_entry *old_shares = 0; + 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) + return 0; + + /* + * Check if the share modes will give us access. + */ + + do { + share_mode_entry broken_entry; + + broke_oplock = False; + *p_all_current_opens_are_level_II = True; + + for(i = 0; i < num_share_modes; i++) { + share_mode_entry *share_entry = &old_shares[i]; + + /* + * By observation of NetBench, oplocks are broken *before* share + * modes are checked. This allows a file to be closed by the client + * if the share mode would deny access and the client has an oplock. + * Check if someone has an oplock on this file. If so we must break + * it before continuing. + */ + + if((*p_oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) || + (!*p_oplock_request && (share_entry->op_type != NO_OPLOCK))) { + + 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)); + + /* Oplock break - unlock to request it. */ + unlock_share_entry(conn, dev, inode); + + opb_ret = request_oplock_break(share_entry); + + /* Now relock. */ + 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; + return -1; + } + + broke_oplock = True; + broken_entry = *share_entry; + break; + + } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) { + *p_all_current_opens_are_level_II = False; + } + + /* someone else has a share lock on it, check to see + if we can too */ + + if(check_share_mode(conn, share_entry, share_mode, fname, fcbopen, p_flags) == False) { + SAFE_FREE(old_shares); + errno = EACCES; + return -1; + } + + } /* end for */ + + if(broke_oplock) { + SAFE_FREE(old_shares); + num_share_modes = get_share_modes(conn, dev, inode, &old_shares); + oplock_contention_count++; + + /* Paranoia check that this is no longer an exlusive entry. */ + for(i = 0; i < num_share_modes; i++) { + share_mode_entry *share_entry = &old_shares[i]; + + if (share_modes_identical(&broken_entry, share_entry) && + EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type) ) { + + /* + * This should not happen. The target left this oplock + * as exlusive.... The process *must* be dead.... + */ + + 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.pid, fname, (unsigned int)dev, (double)inode)); + + if (process_exists(broken_entry.pid)) { + DEBUG(0,("open_mode_check: Existent process %d left active oplock.\n", + broken_entry.pid )); + } + + if (del_share_entry(dev, inode, &broken_entry, NULL) == -1) { + errno = EACCES; + unix_ERR_class = ERRDOS; + unix_ERR_code = ERRbadshare; + return -1; + } + + /* + * We must reload the share modes after deleting the + * other process's entry. + */ + + SAFE_FREE(old_shares); + num_share_modes = get_share_modes(conn, dev, inode, &old_shares); + break; + } + } /* end for paranoia... */ + } /* end if broke_oplock */ + + } while(broke_oplock); + + if(old_shares != 0) + SAFE_FREE(old_shares); + + /* + * Refuse to grant an oplock in case the contention limit is + * reached when going through the lock list multiple times. + */ + + 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 )); + } + + return num_share_modes; +} - /* this is for OS/2 EAs - try and say we don't support them */ - if (strstr(fname,".+,;=[].")) - { - unix_ERR_class = ERRDOS; - /* OS/2 Workplace shell fix may be main code stream in a later release. */ +/**************************************************************************** +set a kernel flock on a file for NFS interoperability +this requires a patch to Linux +****************************************************************************/ +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 + ;; +} + + +/**************************************************************************** + Open a file with a share mode. On output from this open we are guarenteeing + that +****************************************************************************/ +files_struct *open_file_shared(connection_struct *conn,char *fname, SMB_STRUCT_STAT *psbuf, + int share_mode,int ofun, mode_t mode,int oplock_request, + int *Access,int *action) +{ + 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_access_requested = GET_DELETE_ACCESS_REQUESTED(share_mode); + BOOL delete_on_close = GET_DELETE_ON_CLOSE_FLAG(share_mode); + BOOL file_existed = VALID_STAT(*psbuf); + BOOL fcbopen = 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; + + if (conn->printer) { + /* printers are handled completely differently. Most of the passed parameters are + ignored */ + *Access = DOS_OPEN_WRONLY; + *action = FILE_WAS_CREATED; + return print_fsp_open(conn); + } + + fsp = file_new(conn); + if(!fsp) + return NULL; + + DEBUG(10,("open_file_shared: fname = %s, share_mode = %x, ofun = %x, mode = %o, oplock request = %d\n", + fname, share_mode, ofun, (int)mode, oplock_request )); + + if (!check_name(fname,conn)) { + file_free(fsp); + return NULL; + } + + /* ignore any oplock requests if oplocks are disabled */ + if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break) { + oplock_request = 0; + } + + /* this is for OS/2 EAs - try and say we don't support them */ + if (strstr(fname,".+,;=[].")) { + unix_ERR_class = ERRDOS; + /* OS/2 Workplace shell fix may be main code stream in a later release. */ #if 1 /* OS2_WPS_FIX - Recent versions of OS/2 need this. */ - unix_ERR_code = ERRcannotopen; + unix_ERR_code = ERRcannotopen; #else /* OS2_WPS_FIX */ - unix_ERR_code = ERROR_EAS_NOT_SUPPORTED; + unix_ERR_code = ERROR_EAS_NOT_SUPPORTED; #endif /* OS2_WPS_FIX */ - DEBUG(5,("open_file_shared: OS/2 EA's are not supported.\n")); - return; - } + 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 )); - errno = EEXIST; - return; - } + 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); + errno = EEXIST; + return NULL; + } - if (GET_FILE_CREATE_DISPOSITION(ofun) == FILE_CREATE_IF_NOT_EXIST) - flags2 |= O_CREAT; + 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 (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) + flags2 |= O_EXCL; + + /* note that we ignore the append flag as + append does not mean the same thing under dos and unix */ + + switch (GET_OPEN_MODE(share_mode)) { + case DOS_OPEN_WRONLY: + flags = O_WRONLY; + break; + case DOS_OPEN_FCB: + fcbopen = True; + flags = O_RDWR; + break; + case DOS_OPEN_RDWR: + flags = O_RDWR; + break; + default: + flags = O_RDONLY; + break; + } - if (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_TRUNCATE) - flags2 |= O_TRUNC; +#if defined(O_SYNC) + if (GET_FILE_SYNC_OPENMODE(share_mode)) { + flags2 |= O_SYNC; + } +#endif /* O_SYNC */ + + if (flags != O_RDONLY && file_existed && + (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,psbuf)))) { + 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 (GET_FILE_OPEN_DISPOSITION(ofun) == FILE_EXISTS_FAIL) - flags2 |= O_EXCL; + 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; + } - /* note that we ignore the append flag as - append does not mean the same thing under dos and unix */ + if (file_existed) { - switch (GET_OPEN_MODE(share_mode)) - { - case DOS_OPEN_WRONLY: - flags = O_WRONLY; - break; - case DOS_OPEN_FCB: - fcbopen = True; - flags = O_RDWR; - break; - case DOS_OPEN_RDWR: - flags = O_RDWR; - break; - default: - flags = O_RDONLY; - break; - } + dev = psbuf->st_dev; + inode = psbuf->st_ino; -#if defined(O_SYNC) - if (GET_FILE_SYNC_OPENMODE(share_mode)) { - flags2 |= O_SYNC; - } -#endif /* O_SYNC */ - - if (flags != O_RDONLY && file_existed && - (!CAN_WRITE(conn) || IS_DOS_READONLY(dos_mode(conn,fname,&sbuf)))) - { - 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" )); - errno = EACCES; - return; - } - flags = O_RDONLY; - } + lock_share_entry(conn, dev, inode); - if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) - { - DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname)); - errno = EINVAL; - return; - } + num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode, + &flags, &oplock_request, &all_current_opens_are_level_II); + if(num_share_modes == -1) { - if (lp_share_modes(SNUM(conn))) - { - int i; - share_mode_entry *old_shares = 0; + /* + * 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. + */ + fsp_open = open_file(fsp,conn,fname,psbuf,flags|(flags2&~(O_TRUNC|O_CREAT)),mode); - if (file_existed) - { - dev = sbuf.st_dev; - inode = sbuf.st_ino; - lock_share_entry(conn, dev, inode); - share_locked = True; - num_share_modes = get_share_modes(conn, dev, inode, &old_shares); - } - - /* - * Check if the share modes will give us access. - */ - - if(share_locked && (num_share_modes != 0)) - { - BOOL broke_oplock; + 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 )); - do - { + unlock_share_entry(conn, dev, inode); + if (fsp_open) + fd_close(conn, fsp); + file_free(fsp); + return NULL; + } - broke_oplock = False; - all_current_opens_are_level_II = True; + /* + * We exit this block with the share entry *locked*..... + */ + } - for(i = 0; i < num_share_modes; i++) - { - share_mode_entry *share_entry = &old_shares[i]; - - /* - * By observation of NetBench, oplocks are broken *before* share - * modes are checked. This allows a file to be closed by the client - * if the share mode would deny access and the client has an oplock. - * Check if someone has an oplock on this file. If so we must break - * it before continuing. - */ - if((oplock_request && EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) || - (!oplock_request && (share_entry->op_type != NO_OPLOCK))) - { + DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n", + flags,flags2,(int)mode)); - DEBUG(5,("open_file_shared: breaking oplock (%x) on file %s, \ -dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (double)inode)); + /* + * open_file strips any O_TRUNC flags itself. + */ - /* Oplock break.... */ - unlock_share_entry(conn, dev, inode); - if(request_oplock_break(share_entry, dev, inode) == False) - { - free((char *)old_shares); + fsp_open = open_file(fsp,conn,fname,psbuf,flags|flags2,mode); - DEBUG(0,("open_file_shared: FAILED when breaking oplock (%x) on file %s, \ -dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (double)inode)); + if (!fsp_open && (flags == O_RDWR) && (errno != ENOENT) && fcbopen) { + if((fsp_open = open_file(fsp,conn,fname,psbuf,O_RDONLY,mode)) == True) + flags = O_RDONLY; + } - errno = EACCES; - unix_ERR_class = ERRDOS; - unix_ERR_code = ERRbadshare; - return; - } - lock_share_entry(conn, dev, inode); - broke_oplock = True; - all_current_opens_are_level_II = False; - break; - } else if (!LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) { - all_current_opens_are_level_II = False; - } + if (!fsp_open) { + if(file_existed) + unlock_share_entry(conn, dev, inode); + file_free(fsp); + return NULL; + } - /* someone else has a share lock on it, check to see - if we can too */ - if(check_share_mode(share_entry, deny_mode, fname, fcbopen, &flags) == False) - { - free((char *)old_shares); - unlock_share_entry(conn, dev, inode); - errno = EACCES; - return; - } + /* + * 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. + */ - } /* end for */ + if (!file_existed) { - if(broke_oplock) - { - free((char *)old_shares); - num_share_modes = get_share_modes(conn, dev, inode, &old_shares); - oplock_contention_count++; - } - } while(broke_oplock); - } + lock_share_entry_fsp(fsp); - if(old_shares != 0) - free((char *)old_shares); - } + num_share_modes = open_mode_check(conn, fname, dev, inode, share_mode, + &flags, &oplock_request, &all_current_opens_are_level_II); - /* - * Refuse to grant an oplock in case the contention limit is - * reached when going through the lock list multiple times. - */ + if(num_share_modes == -1) { + unlock_share_entry_fsp(fsp); + fd_close(conn,fsp); + file_free(fsp); + return NULL; + } - if(oplock_contention_count >= lp_oplock_contention_limit(SNUM(conn))) - { - oplock_request = 0; - DEBUG(4,("open_file_shared: oplock contention = %d. Not granting oplock.\n", - oplock_contention_count )); - } + /* + * If there are any share modes set then the file *did* + * exist. Ensure we return the correct value for action. + */ - DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n", - flags,flags2,(int)mode)); + if (num_share_modes > 0) + file_existed = True; - open_file(fsp,conn,fname,flags|(flags2&~(O_TRUNC)),mode,file_existed ? &sbuf : 0); - if (!fsp->open && flags==O_RDWR && errno!=ENOENT && fcbopen) - { - flags = O_RDONLY; - open_file(fsp,conn,fname,flags,mode,file_existed ? &sbuf : 0 ); - } + /* + * We exit this block with the share entry *locked*..... + */ + } - if (fsp->open) - { - int open_mode=0; + /* 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, deny_mode); - if((share_locked == False) && lp_share_modes(SNUM(conn))) - { - /* We created the file - thus we must now lock the share entry before creating it. */ - dev = fsp->fd_ptr->dev; - inode = fsp->fd_ptr->inode; - lock_share_entry(conn, dev, inode); - share_locked = True; - } - - 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); - - if (Access) - (*Access) = open_mode; - - if (action) - { - if (file_existed && !(flags2 & O_TRUNC)) *action = FILE_WAS_OPENED; - if (!file_existed) *action = FILE_WAS_CREATED; - if (file_existed && (flags2 & O_TRUNC)) *action = FILE_WAS_OVERWRITTEN; - } - /* We must create the share mode entry before truncate as - truncate can fail due to locking and have to close the - file (which expects the share_mode_entry to be there). - */ - if (lp_share_modes(SNUM(conn))) - { - uint16 port = 0; - - /* - * Setup the oplock info in both the shared memory and - * file structs. - */ - - 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; - } + /* + * 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 ((truncate_unless_locked(conn,fsp) == -1) || (vfs_fstat(fsp,fsp->fd,psbuf)==-1)) { + unlock_share_entry_fsp(fsp); + fd_close(conn,fsp); + file_free(fsp); + return NULL; + } + } - set_share_mode(fsp, port, oplock_request); - } + 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; + } - if ((flags2&O_TRUNC) && file_existed) - truncate_unless_locked(fsp,conn,token,&share_locked); - } + fsp->share_mode = SET_DENY_MODE(deny_mode) | + SET_OPEN_MODE(open_mode) | + SET_ALLOW_SHARE_DELETE(allow_share_delete) | + SET_DELETE_ACCESS_REQUESTED(delete_access_requested); - if (share_locked && lp_share_modes(SNUM(conn))) - unlock_share_entry( conn, dev, inode); + DEBUG(10,("open_file_shared : share_mode = %x\n", fsp->share_mode )); + + if (Access) + (*Access) = open_mode; + + if (action) { + if (file_existed && !(flags2 & O_TRUNC)) + *action = FILE_WAS_OPENED; + if (!file_existed) + *action = FILE_WAS_CREATED; + if (file_existed && (flags2 & O_TRUNC)) + *action = FILE_WAS_OVERWRITTEN; + } + + /* + * Setup the oplock info in both the shared memory and + * file structs. + */ + + 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; + } + + set_share_mode(fsp, port, oplock_request); + + if (delete_on_close) { + NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close); + + if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) { + unlock_share_entry_fsp(fsp); + fd_close(conn,fsp); + file_free(fsp); + return NULL; + } + } + + /* + * Take care of inherited ACLs on created files. JRA. + */ + + if (!file_existed && (conn->vfs_ops.fchmod_acl != NULL)) { + int saved_errno = errno; /* We might get ENOSYS in the next call.. */ + if (conn->vfs_ops.fchmod_acl(fsp, fsp->fd, mode) == -1 && errno == ENOSYS) + errno = saved_errno; /* Ignore ENOSYS */ + } + + unlock_share_entry_fsp(fsp); + + conn->num_files_open++; + + return fsp; } /**************************************************************************** Open a file for permissions read only. Return a pseudo file entry - with the 'stat_open' flag set and a fd_ptr of NULL. + with the 'stat_open' flag set ****************************************************************************/ -int open_file_stat(files_struct *fsp,connection_struct *conn, - char *fname, int smb_ofun, SMB_STRUCT_STAT *pst, int *action) +files_struct *open_file_stat(connection_struct *conn, char *fname, + SMB_STRUCT_STAT *psbuf, int smb_ofun, int *action) { extern struct current_user current_user; + files_struct *fsp = NULL; - if(dos_stat(fname, pst) < 0) { - DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", - fname, strerror(errno) )); - return -1; + if (!VALID_STAT(*psbuf)) { + DEBUG(0,("open_file_stat: unable to stat name = %s. Error was %s\n", fname, strerror(errno) )); + return NULL; } - if(S_ISDIR(pst->st_mode)) { + if(S_ISDIR(psbuf->st_mode)) { DEBUG(0,("open_file_stat: %s is a directory !\n", fname )); - return -1; + return NULL; } + fsp = file_new(conn); + if(!fsp) + return NULL; + *action = FILE_WAS_OPENED; DEBUG(5,("open_file_stat: opening file %s as a stat entry\n", fname)); @@ -1112,14 +968,12 @@ int open_file_stat(files_struct *fsp,connection_struct *conn, * Setup the files_struct for it. */ - fsp->fd_ptr = NULL; - conn->num_files_open++; - fsp->mode = 0; - GetTimeOfDay(&fsp->open_time); + 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->size = 0; fsp->pos = -1; - fsp->open = True; fsp->can_lock = False; fsp->can_read = False; fsp->can_write = False; @@ -1132,48 +986,92 @@ int open_file_stat(files_struct *fsp,connection_struct *conn, fsp->stat_open = True; fsp->directory_delete_on_close = False; fsp->conn = conn; - /* - * Note that the file name here is the *untranslated* name - * ie. it is still in the DOS codepage sent from the client. - * All use of this filename will pass though the sys_xxxx - * functions which will do the dos_to_unix translation before - * mapping into a UNIX filename. JRA. - */ string_set(&fsp->fsp_name,fname); - fsp->wbmpx_ptr = NULL; - fsp->wcp = NULL; /* Write cache pointer. */ + fsp->wcp = NULL; /* Write cache pointer. */ + + 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, 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); + + /* + * This is not a user visible file open. + * Don't set a share mode and don't increment + * the conn->num_files_open. + */ - return 0; + 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. ****************************************************************************/ -int open_directory(files_struct *fsp,connection_struct *conn, - char *fname, int smb_ofun, mode_t unixmode, int *action) +files_struct *open_directory(connection_struct *conn, char *fname, + SMB_STRUCT_STAT *psbuf, int share_mode, int smb_ofun, mode_t unixmode, int *action) { extern struct current_user current_user; - SMB_STRUCT_STAT st; 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(dos_stat(fname, &st) == 0) { + fsp->conn = conn; /* The vfs_fXXX() macros need this. */ + + if (VALID_STAT(*psbuf)) got_stat = True; - } if (got_stat && (GET_FILE_OPEN_DISPOSITION(smb_ofun) == FILE_EXISTS_FAIL)) { + file_free(fsp); errno = EEXIST; /* Setup so correct error is returned to client. */ - return -1; + return NULL; } if (GET_FILE_CREATE_DISPOSITION(smb_ofun) == FILE_CREATE_IF_NOT_EXIST) { if (got_stat) { - if(!S_ISDIR(st.st_mode)) { + if(!S_ISDIR(psbuf->st_mode)) { DEBUG(0,("open_directory: %s is not a directory !\n", fname )); + file_free(fsp); errno = EACCES; - return -1; + return NULL; } *action = FILE_WAS_OPENED; @@ -1185,15 +1083,23 @@ int open_directory(files_struct *fsp,connection_struct *conn, if(!CAN_WRITE(conn)) { DEBUG(2,("open_directory: failing create on read-only share\n")); + file_free(fsp); errno = EACCES; - return -1; + return NULL; } - if(dos_mkdir(fname, unix_mode(conn,aDIR, fname)) < 0) { - DEBUG(0,("open_directory: unable to create %s. Error was %s\n", + 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) )); - return -1; + file_free(fsp); + return NULL; } + + if(vfs_stat(conn,fname, psbuf) != 0) { + file_free(fsp); + return NULL; + } + *action = FILE_WAS_CREATED; } @@ -1206,36 +1112,35 @@ int open_directory(files_struct *fsp,connection_struct *conn, if(!got_stat) { DEBUG(0,("open_directory: unable to stat name = %s. Error was %s\n", fname, strerror(errno) )); - return -1; + file_free(fsp); + return NULL; } - if(!S_ISDIR(st.st_mode)) { + if(!S_ISDIR(psbuf->st_mode)) { DEBUG(0,("open_directory: %s is not a directory !\n", fname )); - return -1; + file_free(fsp); + return NULL; } *action = FILE_WAS_OPENED; } - DEBUG(5,("open_directory: opening directory %s\n", - fname)); + DEBUG(5,("open_directory: opening directory %s\n", fname)); /* * Setup the files_struct for it. */ - fsp->fd_ptr = NULL; - conn->num_files_open++; - fsp->mode = 0; - GetTimeOfDay(&fsp->open_time); + 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->size = 0; fsp->pos = -1; - fsp->open = True; fsp->can_lock = True; fsp->can_read = False; fsp->can_write = False; - fsp->share_mode = 0; + fsp->share_mode = share_mode; fsp->print_file = False; fsp->modified = False; fsp->oplock_type = NO_OPLOCK; @@ -1243,17 +1148,19 @@ int open_directory(files_struct *fsp,connection_struct *conn, fsp->is_directory = True; fsp->directory_delete_on_close = False; fsp->conn = conn; - /* - * Note that the file name here is the *untranslated* name - * ie. it is still in the DOS codepage sent from the client. - * All use of this filename will pass though the sys_xxxx - * functions which will do the dos_to_unix translation before - * mapping into a UNIX filename. JRA. - */ string_set(&fsp->fsp_name,fname); - fsp->wbmpx_ptr = NULL; - return 0; + if (delete_on_close) { + NTSTATUS result = set_delete_on_close_internal(fsp, delete_on_close); + + if (NT_STATUS_V(result) != NT_STATUS_V(NT_STATUS_OK)) { + file_free(fsp); + return NULL; + } + } + conn->num_files_open++; + + return fsp; } /******************************************************************* @@ -1268,14 +1175,12 @@ BOOL check_file_sharing(connection_struct *conn,char *fname, BOOL rename_op) share_mode_entry *old_shares = 0; int num_share_modes; SMB_STRUCT_STAT sbuf; - pid_t pid = getpid(); + pid_t pid = sys_getpid(); SMB_DEV_T dev; SMB_INO_T inode; - if(!lp_share_modes(SNUM(conn))) - return True; - - if (dos_stat(fname,&sbuf) == -1) return(True); + if (vfs_stat(conn,fname,&sbuf) == -1) + return(True); dev = sbuf.st_dev; inode = sbuf.st_ino; @@ -1352,13 +1257,12 @@ dev = %x, inode = %.0f\n", share_entry->op_type, fname, (unsigned int)dev, (doub /* Oplock break.... */ unlock_share_entry(conn, dev, inode); - if(request_oplock_break(share_entry, dev, inode) == False) + if(request_oplock_break(share_entry) == False) { - free((char *)old_shares); - DEBUG(0,("check_file_sharing: 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); return False; } lock_share_entry(conn, dev, inode); @@ -1388,7 +1292,7 @@ dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (dou if(broke_oplock) { - free((char *)old_shares); + SAFE_FREE(old_shares); num_share_modes = get_share_modes(conn, dev, inode, &old_shares); } } while(broke_oplock); @@ -1409,7 +1313,6 @@ dev = %x, inode = %.0f\n", old_shares[i].op_type, fname, (unsigned int)dev, (dou free_and_exit: unlock_share_entry(conn, dev, inode); - if(old_shares != NULL) - free((char *)old_shares); + SAFE_FREE(old_shares); return(ret); }