smbd/fileio.c

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/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   read/write to a files_struct
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Jeremy Allison 2000-2002. - write cache.
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

static BOOL setup_write_cache(files_struct *, SMB_OFF_T);

/****************************************************************************
 Read from write cache if we can.
****************************************************************************/

static BOOL read_from_write_cache(files_struct *fsp,char *data,SMB_OFF_T pos,size_t n)
{
        write_cache *wcp = fsp->wcp;

        if(!wcp) {
                return False;
        }

        if( n > wcp->data_size || pos < wcp->offset || pos + n > wcp->offset + wcp->data_size) {
                return False;
        }

        memcpy(data, wcp->data + (pos - wcp->offset), n);

        DO_PROFILE_INC(writecache_read_hits);

        return True;
}

/****************************************************************************
 Read from a file.
****************************************************************************/

ssize_t read_file(files_struct *fsp,char *data,SMB_OFF_T pos,size_t n)
{
        ssize_t ret=0,readret;

        /* you can't read from print files */
        if (fsp->print_file) {
                return -1;
        }

        /*
         * Serve from write cache if we can.
         */

        if(read_from_write_cache(fsp, data, pos, n)) {
                fsp->fh->pos = pos + n;
                fsp->fh->position_information = fsp->fh->pos;
                return n;
        }

        flush_write_cache(fsp, READ_FLUSH);

        fsp->fh->pos = pos;

        if (n > 0) {
#ifdef DMF_FIX
                int numretries = 3;
tryagain:
                readret = SMB_VFS_PREAD(fsp,fsp->fh->fd,data,n,pos);

                if (readret == -1) {
                        if ((errno == EAGAIN) && numretries) {
                                DEBUG(3,("read_file EAGAIN retry in 10 seconds\n"));
                                (void)sleep(10);
                                --numretries;
                                goto tryagain;
                        }
                        return -1;
                }
#else /* NO DMF fix. */
                readret = SMB_VFS_PREAD(fsp,fsp->fh->fd,data,n,pos);

                if (readret == -1) {
                        return -1;
                }
#endif
                if (readret > 0) {
                        ret += readret;
                }
        }

        DEBUG(10,("read_file (%s): pos = %.0f, size = %lu, returned %lu\n",
                fsp->fsp_name, (double)pos, (unsigned long)n, (long)ret ));

        fsp->fh->pos += ret;
        fsp->fh->position_information = fsp->fh->pos;

        return(ret);
}

/* how many write cache buffers have been allocated */
static unsigned int allocated_write_caches;

/****************************************************************************
 *Really* write to a file.
****************************************************************************/

static ssize_t real_write_file(files_struct *fsp,const char *data, SMB_OFF_T pos, size_t n)
{
        ssize_t ret;

        if (pos == -1) {
                ret = vfs_write_data(fsp, data, n);
        } else {
                fsp->fh->pos = pos;
                if (pos && lp_strict_allocate(SNUM(fsp->conn))) {
                        if (vfs_fill_sparse(fsp, pos) == -1) {
                                return -1;
                        }
                }
                ret = vfs_pwrite_data(fsp, data, n, pos);
        }

        DEBUG(10,("real_write_file (%s): pos = %.0f, size = %lu, returned %ld\n",
                fsp->fsp_name, (double)pos, (unsigned long)n, (long)ret ));

        if (ret != -1) {
                fsp->fh->pos += ret;

                /*
                 * It turns out that setting the last write time from a Windows
                 * client stops any subsequent writes from updating the write time.
                 * Doing this after the write gives a race condition here where
                 * a stat may see the changed write time before we reset it here,
                 * but it's cheaper than having to store the write time in shared
                 * memory and look it up using dev/inode across all running smbd's.
                 * The 99% solution will hopefully be good enough in this case. JRA.
                 */

                if (!null_timespec(fsp->pending_modtime)) {
                        set_filetime(fsp->conn, fsp->fsp_name, fsp->pending_modtime);

                        /* If we didn't get the "set modtime" call ourselves, we must
                           store the last write time to restore on close. JRA. */
                        if (!fsp->pending_modtime_owner) {
                                fsp->last_write_time = timespec_current();
                        }
                }

/* Yes - this is correct - writes don't update this. JRA. */
/* Found by Samba4 tests. */
#if 0
                fsp->position_information = fsp->pos;
#endif
        }

        return ret;
}

/****************************************************************************
 File size cache change.
 Updates size on disk but doesn't flush the cache.
****************************************************************************/

static int wcp_file_size_change(files_struct *fsp)
{
        int ret;
        write_cache *wcp = fsp->wcp;

        wcp->file_size = wcp->offset + wcp->data_size;
        ret = SMB_VFS_FTRUNCATE(fsp, fsp->fh->fd, wcp->file_size);
        if (ret == -1) {
                DEBUG(0,("wcp_file_size_change (%s): ftruncate of size %.0f error %s\n",
                        fsp->fsp_name, (double)wcp->file_size, strerror(errno) ));
        }
        return ret;
}

/****************************************************************************
 Write to a file.
****************************************************************************/

ssize_t write_file(files_struct *fsp, const char *data, SMB_OFF_T pos, size_t n)
{
        write_cache *wcp = fsp->wcp;
        ssize_t total_written = 0;
        int write_path = -1; 

        if (fsp->print_file) {
                fstring sharename;
                uint32 jobid;

                if (!rap_to_pjobid(fsp->rap_print_jobid, sharename, &jobid)) {
                        DEBUG(3,("write_file: Unable to map RAP jobid %u to jobid.\n",
                                                (unsigned int)fsp->rap_print_jobid ));
                        errno = EBADF;
                        return -1;
                }

                return print_job_write(SNUM(fsp->conn), jobid, data, pos, n);
        }

        if (!fsp->can_write) {
                errno = EPERM;
                return -1;
        }

        if (!fsp->modified) {
                SMB_STRUCT_STAT st;
                fsp->modified = True;

                if (SMB_VFS_FSTAT(fsp,fsp->fh->fd,&st) == 0) {
                        int dosmode = dos_mode(fsp->conn,fsp->fsp_name,&st);
                        if ((lp_store_dos_attributes(SNUM(fsp->conn)) || MAP_ARCHIVE(fsp->conn)) && !IS_DOS_ARCHIVE(dosmode)) {
                                file_set_dosmode(fsp->conn,fsp->fsp_name,dosmode | aARCH,&st, False);
                        }

                        /*
                         * If this is the first write and we have an exclusive oplock then setup
                         * the write cache.
                         */

                        if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && !wcp) {
                                setup_write_cache(fsp, st.st_size);
                                wcp = fsp->wcp;
                        } 
                }  
        }

#ifdef WITH_PROFILE
        DO_PROFILE_INC(writecache_total_writes);
        if (!fsp->oplock_type) {
                DO_PROFILE_INC(writecache_non_oplock_writes);
        }
#endif

        /*
         * If this file is level II oplocked then we need
         * to grab the shared memory lock and inform all
         * other files with a level II lock that they need
         * to flush their read caches. We keep the lock over
         * the shared memory area whilst doing this.
         */

        release_level_2_oplocks_on_change(fsp);

#ifdef WITH_PROFILE
        if (profile_p && profile_p->writecache_total_writes % 500 == 0) {
                DEBUG(3,("WRITECACHE: initwrites=%u abutted=%u total=%u \
nonop=%u allocated=%u active=%u direct=%u perfect=%u readhits=%u\n",
                        profile_p->writecache_init_writes,
                        profile_p->writecache_abutted_writes,
                        profile_p->writecache_total_writes,
                        profile_p->writecache_non_oplock_writes,
                        profile_p->writecache_allocated_write_caches,
                        profile_p->writecache_num_write_caches,
                        profile_p->writecache_direct_writes,
                        profile_p->writecache_num_perfect_writes,
                        profile_p->writecache_read_hits ));

                DEBUG(3,("WRITECACHE: Flushes SEEK=%d, READ=%d, WRITE=%d, READRAW=%d, OPLOCK=%d, CLOSE=%d, SYNC=%d\n",
                        profile_p->writecache_flushed_writes[SEEK_FLUSH],
                        profile_p->writecache_flushed_writes[READ_FLUSH],
                        profile_p->writecache_flushed_writes[WRITE_FLUSH],
                        profile_p->writecache_flushed_writes[READRAW_FLUSH],
                        profile_p->writecache_flushed_writes[OPLOCK_RELEASE_FLUSH],
                        profile_p->writecache_flushed_writes[CLOSE_FLUSH],
                        profile_p->writecache_flushed_writes[SYNC_FLUSH] ));
        }
#endif

        if(!wcp) {
                DO_PROFILE_INC(writecache_direct_writes);
                total_written = real_write_file(fsp, data, pos, n);
                return total_written;
        }

        DEBUG(9,("write_file (%s)(fd=%d pos=%.0f size=%u) wcp->offset=%.0f wcp->data_size=%u\n",
                fsp->fsp_name, fsp->fh->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigned int)wcp->data_size));

        fsp->fh->pos = pos + n;

        /* 
         * If we have active cache and it isn't contiguous then we flush.
         * NOTE: There is a small problem with running out of disk ....
         */

        if (wcp->data_size) {
                BOOL cache_flush_needed = False;

                if ((pos >= wcp->offset) && (pos <= wcp->offset + wcp->data_size)) {
      
                        /* ASCII art.... JRA.

      +--------------+-----
      | Cached data  | Rest of allocated cache buffer....
      +--------------+-----

            +-------------------+
            | Data to write     |
            +-------------------+

                        */

                        /*
                         * Start of write overlaps or abutts the existing data.
                         */

                        size_t data_used = MIN((wcp->alloc_size - (pos - wcp->offset)), n);

                        memcpy(wcp->data + (pos - wcp->offset), data, data_used);

                        /*
                         * Update the current buffer size with the new data.
                         */

                        if(pos + data_used > wcp->offset + wcp->data_size) {
                                wcp->data_size = pos + data_used - wcp->offset;
                        }

                        /*
                         * Update the file size if changed.
                         */

                        if (wcp->offset + wcp->data_size > wcp->file_size) {
                                if (wcp_file_size_change(fsp) == -1) {
                                        return -1;
                                }
                        }

                        /*
                         * If we used all the data then
                         * return here.
                         */

                        if(n == data_used) {
                                return n;
                        } else {
                                cache_flush_needed = True;
                        }
                        /*
                         * Move the start of data forward by the amount used,
                         * cut down the amount left by the same amount.
                         */

                        data += data_used;
                        pos += data_used;
                        n -= data_used;

                        DO_PROFILE_INC(writecache_abutted_writes);
                        total_written = data_used;

                        write_path = 1;

                } else if ((pos < wcp->offset) && (pos + n > wcp->offset) && 
                                        (pos + n <= wcp->offset + wcp->alloc_size)) {

                        /* ASCII art.... JRA.

                        +---------------+
                        | Cache buffer  |
                        +---------------+

            +-------------------+
            | Data to write     |
            +-------------------+

                        */

                        /*
                         * End of write overlaps the existing data.
                         */

                        size_t data_used = pos + n - wcp->offset;

                        memcpy(wcp->data, data + n - data_used, data_used);

                        /*
                         * Update the current buffer size with the new data.
                         */

                        if(pos + n > wcp->offset + wcp->data_size) {
                                wcp->data_size = pos + n - wcp->offset;
                        }

                        /*
                         * Update the file size if changed.
                         */

                        if (wcp->offset + wcp->data_size > wcp->file_size) {
                                if (wcp_file_size_change(fsp) == -1) {
                                        return -1;
                                }
                        }

                        /*
                         * We don't need to move the start of data, but we
                         * cut down the amount left by the amount used.
                         */

                        n -= data_used;

                        /*
                         * We cannot have used all the data here.
                         */

                        cache_flush_needed = True;

                        DO_PROFILE_INC(writecache_abutted_writes);
                        total_written = data_used;

                        write_path = 2;

                } else if ( (pos >= wcp->file_size) && 
                                        (wcp->offset + wcp->data_size == wcp->file_size) &&
                                        (pos > wcp->offset + wcp->data_size) && 
                                        (pos < wcp->offset + wcp->alloc_size) ) {

                        /* ASCII art.... JRA.

                       End of file ---->|

                        +---------------+---------------+
                        | Cached data   | Cache buffer  |
                        +---------------+---------------+

                                              +-------------------+
                                              | Data to write     |
                                              +-------------------+

                        */

                        /*
                         * Non-contiguous write part of which fits within
                         * the cache buffer and is extending the file
                         * and the cache contents reflect the current
                         * data up to the current end of the file.
                         */

                        size_t data_used;

                        if(pos + n <= wcp->offset + wcp->alloc_size) {
                                data_used = n;
                        } else {
                                data_used = wcp->offset + wcp->alloc_size - pos;
                        }

                        /*
                         * Fill in the non-continuous area with zeros.
                         */

                        memset(wcp->data + wcp->data_size, '\0',
                                pos - (wcp->offset + wcp->data_size) );

                        memcpy(wcp->data + (pos - wcp->offset), data, data_used);

                        /*
                         * Update the current buffer size with the new data.
                         */

                        if(pos + data_used > wcp->offset + wcp->data_size) {
                                wcp->data_size = pos + data_used - wcp->offset;
                        }

                        /*
                         * Update the file size if changed.
                         */

                        if (wcp->offset + wcp->data_size > wcp->file_size) {
                                if (wcp_file_size_change(fsp) == -1) {
                                        return -1;
                                }
                        }

                        /*
                         * If we used all the data then
                         * return here.
                         */

                        if(n == data_used) {
                                return n;
                        } else {
                                cache_flush_needed = True;
                        }

                        /*
                         * Move the start of data forward by the amount used,
                         * cut down the amount left by the same amount.
                         */

                        data += data_used;
                        pos += data_used;
                        n -= data_used;

                        DO_PROFILE_INC(writecache_abutted_writes);
                        total_written = data_used;

                        write_path = 3;

                } else if ( (pos >= wcp->file_size) &&
                            (n == 1) &&
                            (wcp->file_size == wcp->offset + wcp->data_size) &&
                            (pos < wcp->file_size + wcp->alloc_size)) {

                        /*

                End of file ---->|

                 +---------------+---------------+
                 | Cached data   | Cache buffer  |
                 +---------------+---------------+

                                 |<------- allocated size ---------------->|

                                                         +--------+
                                                         | 1 Byte |
                                                         +--------+

                        MS-Office seems to do this a lot to determine if there's enough
                        space on the filesystem to write a new file.

                        Change to :

                End of file ---->|
                                 +-----------------------+--------+
                                 | Zeroed Cached data    | 1 Byte |
                                 +-----------------------+--------+
                        */

                        flush_write_cache(fsp, WRITE_FLUSH);
                        wcp->offset = wcp->file_size;
                        wcp->data_size = pos - wcp->file_size + 1;
                        memset(wcp->data, '\0', wcp->data_size);
                        memcpy(wcp->data + wcp->data_size-1, data, 1);

                        /*
                         * Update the file size if changed.
                         */

                        if (wcp->offset + wcp->data_size > wcp->file_size) {
                                if (wcp_file_size_change(fsp) == -1) {
                                        return -1;
                                }
                        }

                        return n;

                } else {

                        /* ASCII art..... JRA.

   Case 1).

                        +---------------+---------------+
                        | Cached data   | Cache buffer  |
                        +---------------+---------------+

                                                              +-------------------+
                                                              | Data to write     |
                                                              +-------------------+

   Case 2).

                           +---------------+---------------+
                           | Cached data   | Cache buffer  |
                           +---------------+---------------+

   +-------------------+
   | Data to write     |
   +-------------------+

    Case 3).

                           +---------------+---------------+
                           | Cached data   | Cache buffer  |
                           +---------------+---------------+

                  +-----------------------------------------------------+
                  | Data to write                                       |
                  +-----------------------------------------------------+

                  */

                        /*
                         * Write is bigger than buffer, or there is no overlap on the
                         * low or high ends.
                         */

                        DEBUG(9,("write_file: non cacheable write : fd = %d, pos = %.0f, len = %u, current cache pos = %.0f \
len = %u\n",fsp->fh->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigned int)wcp->data_size ));

                        /*
                         * If write would fit in the cache, and is larger than
                         * the data already in the cache, flush the cache and
                         * preferentially copy the data new data into it. Otherwise
                         * just write the data directly.
                         */

                        if ( n <= wcp->alloc_size && n > wcp->data_size) {
                                cache_flush_needed = True;
                        } else {
                                ssize_t ret = real_write_file(fsp, data, pos, n);

                                /*
                                 * If the write overlaps the entire cache, then
                                 * discard the current contents of the cache.
                                 * Fix from Rasmus Borup Hansen rbh@math.ku.dk.
                                 */

                                if ((pos <= wcp->offset) &&
                                                (pos + n >= wcp->offset + wcp->data_size) ) {
                                        DEBUG(9,("write_file: discarding overwritten write \
cache: fd = %d, off=%.0f, size=%u\n", fsp->fh->fd, (double)wcp->offset, (unsigned int)wcp->data_size ));
                                        wcp->data_size = 0;
                                }

                                DO_PROFILE_INC(writecache_direct_writes);
                                if (ret == -1) {
                                        return ret;
                                }

                                if (pos + ret > wcp->file_size) {
                                        wcp->file_size = pos + ret;
                                }

                                return ret;
                        }

                        write_path = 4;

                }

                if (cache_flush_needed) {
                        DEBUG(3,("WRITE_FLUSH:%d: due to noncontinuous write: fd = %d, size = %.0f, pos = %.0f, \
n = %u, wcp->offset=%.0f, wcp->data_size=%u\n",
                                write_path, fsp->fh->fd, (double)wcp->file_size, (double)pos, (unsigned int)n,
                                (double)wcp->offset, (unsigned int)wcp->data_size ));

                        flush_write_cache(fsp, WRITE_FLUSH);
                }
        }

        /*
         * If the write request is bigger than the cache
         * size, write it all out.
         */

        if (n > wcp->alloc_size ) {
                ssize_t ret = real_write_file(fsp, data, pos, n);
                if (ret == -1) {
                        return -1;
                }

                if (pos + ret > wcp->file_size) {
                        wcp->file_size = pos + n;
                }

                DO_PROFILE_INC(writecache_direct_writes);
                return total_written + n;
        }

        /*
         * If there's any data left, cache it.
         */

        if (n) {
#ifdef WITH_PROFILE
                if (wcp->data_size) {
                        DO_PROFILE_INC(writecache_abutted_writes);
                } else {
                        DO_PROFILE_INC(writecache_init_writes);
                }
#endif
                memcpy(wcp->data+wcp->data_size, data, n);
                if (wcp->data_size == 0) {
                        wcp->offset = pos;
                        DO_PROFILE_INC(writecache_num_write_caches);
                }
                wcp->data_size += n;

                /*
                 * Update the file size if changed.
                 */

                if (wcp->offset + wcp->data_size > wcp->file_size) {
                        if (wcp_file_size_change(fsp) == -1) {
                                return -1;
                        }
                }
                DEBUG(9,("wcp->offset = %.0f wcp->data_size = %u cache return %u\n",
                        (double)wcp->offset, (unsigned int)wcp->data_size, (unsigned int)n));

                total_written += n;
                return total_written; /* .... that's a write :) */
        }
  
        return total_written;
}

/****************************************************************************
 Delete the write cache structure.
****************************************************************************/

void delete_write_cache(files_struct *fsp)
{
        write_cache *wcp;

        if(!fsp) {
                return;
        }

        if(!(wcp = fsp->wcp)) {
                return;
        }

        DO_PROFILE_DEC(writecache_allocated_write_caches);
        allocated_write_caches--;

        SMB_ASSERT(wcp->data_size == 0);

        SAFE_FREE(wcp->data);
        SAFE_FREE(fsp->wcp);

        DEBUG(10,("delete_write_cache: File %s deleted write cache\n", fsp->fsp_name ));
}

/****************************************************************************
 Setup the write cache structure.
****************************************************************************/

static BOOL setup_write_cache(files_struct *fsp, SMB_OFF_T file_size)
{
        ssize_t alloc_size = lp_write_cache_size(SNUM(fsp->conn));
        write_cache *wcp;

        if (allocated_write_caches >= MAX_WRITE_CACHES) {
                return False;
        }

        if(alloc_size == 0 || fsp->wcp) {
                return False;
        }

        if((wcp = SMB_MALLOC_P(write_cache)) == NULL) {
                DEBUG(0,("setup_write_cache: malloc fail.\n"));
                return False;
        }

        wcp->file_size = file_size;
        wcp->offset = 0;
        wcp->alloc_size = alloc_size;
        wcp->data_size = 0;
        if((wcp->data = (char *)SMB_MALLOC(wcp->alloc_size)) == NULL) {
                DEBUG(0,("setup_write_cache: malloc fail for buffer size %u.\n",
                        (unsigned int)wcp->alloc_size ));
                SAFE_FREE(wcp);
                return False;
        }

        memset(wcp->data, '\0', wcp->alloc_size );

        fsp->wcp = wcp;
        DO_PROFILE_INC(writecache_allocated_write_caches);
        allocated_write_caches++;

        DEBUG(10,("setup_write_cache: File %s allocated write cache size %lu\n",
                fsp->fsp_name, (unsigned long)wcp->alloc_size ));

        return True;
}

/****************************************************************************
 Cope with a size change.
****************************************************************************/

void set_filelen_write_cache(files_struct *fsp, SMB_OFF_T file_size)
{
        if(fsp->wcp) {
                /* The cache *must* have been flushed before we do this. */
                if (fsp->wcp->data_size != 0) {
                        pstring msg;
                        slprintf(msg, sizeof(msg)-1, "set_filelen_write_cache: size change \
on file %s with write cache size = %lu\n", fsp->fsp_name, (unsigned long)fsp->wcp->data_size );
                        smb_panic(msg);
                }
                fsp->wcp->file_size = file_size;
        }
}

/*******************************************************************
 Flush a write cache struct to disk.
********************************************************************/

ssize_t flush_write_cache(files_struct *fsp, enum flush_reason_enum reason)
{
        write_cache *wcp = fsp->wcp;
        size_t data_size;
        ssize_t ret;

        if(!wcp || !wcp->data_size) {
                return 0;
        }

        data_size = wcp->data_size;
        wcp->data_size = 0;

        DO_PROFILE_DEC_INC(writecache_num_write_caches,writecache_flushed_writes[reason]);

        DEBUG(9,("flushing write cache: fd = %d, off=%.0f, size=%u\n",
                fsp->fh->fd, (double)wcp->offset, (unsigned int)data_size));

#ifdef WITH_PROFILE
        if(data_size == wcp->alloc_size) {
                DO_PROFILE_INC(writecache_num_perfect_writes);
        }
#endif

        ret = real_write_file(fsp, wcp->data, wcp->offset, data_size);

        /*
         * Ensure file size if kept up to date if write extends file.
         */

        if ((ret != -1) && (wcp->offset + ret > wcp->file_size)) {
                wcp->file_size = wcp->offset + ret;
        }

        return ret;
}

/*******************************************************************
sync a file
********************************************************************/

NTSTATUS sync_file(connection_struct *conn, files_struct *fsp, BOOL write_through)
{
        if (fsp->fh->fd == -1)
                return NT_STATUS_INVALID_HANDLE;

        if (lp_strict_sync(SNUM(conn)) &&
            (lp_syncalways(SNUM(conn)) || write_through)) {
                int ret = flush_write_cache(fsp, SYNC_FLUSH);
                if (ret == -1) {
                        return map_nt_error_from_unix(errno);
                }
                ret = SMB_VFS_FSYNC(fsp,fsp->fh->fd);
                if (ret == -1) {
                        return map_nt_error_from_unix(errno);
                }
        }
        return NT_STATUS_OK;
}

/************************************************************
 Perform a stat whether a valid fd or not.
************************************************************/

int fsp_stat(files_struct *fsp, SMB_STRUCT_STAT *pst)
{
        if (fsp->fh->fd == -1) {
                return SMB_VFS_STAT(fsp->conn, fsp->fsp_name, pst);
        } else {
                return SMB_VFS_FSTAT(fsp,fsp->fh->fd, pst);
        }
}

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