diff options
Diffstat (limited to 'source3/smbd/fileio.c')
| -rw-r--r-- | source3/smbd/fileio.c | 779 |
1 files changed, 395 insertions, 384 deletions
diff --git a/source3/smbd/fileio.c b/source3/smbd/fileio.c index addbcb0b3c..710ba396d8 100644 --- a/source3/smbd/fileio.c +++ b/source3/smbd/fileio.c @@ -1,7 +1,9 @@ /* - Unix SMB/CIFS implementation. + 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 @@ -23,31 +25,32 @@ static BOOL setup_write_cache(files_struct *, SMB_OFF_T); /**************************************************************************** -seek a file. Try to avoid the seek if possible + Seek a file. Try to avoid the seek if possible. ****************************************************************************/ -SMB_OFF_T seek_file(files_struct *fsp,SMB_OFF_T pos) +static SMB_OFF_T seek_file(files_struct *fsp,SMB_OFF_T pos) { - SMB_OFF_T offset = 0; - SMB_OFF_T seek_ret; + SMB_OFF_T offset = 0; + SMB_OFF_T seek_ret; - if (fsp->print_file && lp_postscript(fsp->conn->service)) - offset = 3; + if (fsp->print_file && lp_postscript(fsp->conn->service)) + offset = 3; - seek_ret = fsp->conn->vfs_ops.lseek(fsp,fsp->fd,pos+offset,SEEK_SET); + seek_ret = fsp->conn->vfs_ops.lseek(fsp,fsp->fd,pos+offset,SEEK_SET); - if(seek_ret == -1) { - DEBUG(0,("seek_file: sys_lseek failed. Error was %s\n", strerror(errno) )); - fsp->pos = -1; - return -1; - } + if(seek_ret == -1) { + DEBUG(0,("seek_file: (%s) sys_lseek failed. Error was %s\n", + fsp->fsp_name, strerror(errno) )); + fsp->pos = -1; + return -1; + } - fsp->pos = seek_ret - offset; + fsp->pos = seek_ret - offset; - DEBUG(10,("seek_file: requested pos = %.0f, new pos = %.0f\n", - (double)(pos+offset), (double)fsp->pos )); + DEBUG(10,("seek_file (%s): requested pos = %.0f, new pos = %.0f\n", + fsp->fsp_name, (double)(pos+offset), (double)fsp->pos )); - return(fsp->pos); + return(fsp->pos); } /**************************************************************************** @@ -55,25 +58,25 @@ SMB_OFF_T seek_file(files_struct *fsp,SMB_OFF_T pos) ****************************************************************************/ -BOOL read_from_write_cache(files_struct *fsp,char *data,SMB_OFF_T pos,size_t n) +static BOOL read_from_write_cache(files_struct *fsp,char *data,SMB_OFF_T pos,size_t n) { - write_cache *wcp = fsp->wcp; + write_cache *wcp = fsp->wcp; - if(!wcp) - return False; + if(!wcp) + return False; - if(n > wcp->data_size || pos < wcp->offset || pos + n > wcp->offset + wcp->data_size) - 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); + memcpy(data, wcp->data + (pos - wcp->offset), n); - DO_PROFILE_INC(writecache_read_hits); + DO_PROFILE_INC(writecache_read_hits); - return True; + return True; } /**************************************************************************** -read from a file + Read from a file. ****************************************************************************/ ssize_t read_file(files_struct *fsp,char *data,SMB_OFF_T pos,size_t n) @@ -121,6 +124,9 @@ tryagain: ret += readret; } + DEBUG(10,("read_file (%s): pos = %.0f, size = %lu, returned %lu\n", + fsp->fsp_name, (double)pos, (unsigned long)n, (long)ret )); + return(ret); } @@ -133,10 +139,17 @@ static unsigned int allocated_write_caches; static ssize_t real_write_file(files_struct *fsp,char *data,SMB_OFF_T pos, size_t n) { - if ((pos != -1) && (seek_file(fsp,pos) == -1)) - return -1; + ssize_t ret; + + if ((pos != -1) && (seek_file(fsp,pos) == -1)) + return -1; + + ret = vfs_write_data(fsp,data,n); + + DEBUG(10,("real_write_file (%s): pos = %.0f, size = %lu, returned %ld\n", + fsp->fsp_name, (double)pos, (unsigned long)n, (long)ret )); - return vfs_write_data(fsp,data,n); + return ret; } /**************************************************************************** @@ -145,367 +158,365 @@ write to a file ssize_t write_file(files_struct *fsp, 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) { - return print_job_write(fsp->print_jobid, data, n); - } - - if (!fsp->can_write) { - errno = EPERM; - return(0); - } - - if (!fsp->modified) { - SMB_STRUCT_STAT st; - fsp->modified = True; - - if (fsp->conn->vfs_ops.fstat(fsp,fsp->fd,&st) == 0) { - int dosmode = dos_mode(fsp->conn,fsp->fsp_name,&st); - fsp->size = st.st_size; - if (MAP_ARCHIVE(fsp->conn) && !IS_DOS_ARCHIVE(dosmode)) { - file_chmod(fsp->conn,fsp->fsp_name,dosmode | aARCH,&st); - } - - /* - * 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; - } - } - } + write_cache *wcp = fsp->wcp; + ssize_t total_written = 0; + int write_path = -1; + + if (fsp->print_file) + return print_job_write(fsp->print_jobid, data, n); + + if (!fsp->can_write) { + errno = EPERM; + return(0); + } + + if (!fsp->modified) { + SMB_STRUCT_STAT st; + fsp->modified = True; + + if (fsp->conn->vfs_ops.fstat(fsp,fsp->fd,&st) == 0) { + int dosmode = dos_mode(fsp->conn,fsp->fsp_name,&st); + fsp->size = st.st_size; + if (MAP_ARCHIVE(fsp->conn) && !IS_DOS_ARCHIVE(dosmode)) + file_chmod(fsp->conn,fsp->fsp_name,dosmode | aARCH,&st); + + /* + * 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); - } + 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. - */ + /* + * 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); + 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 \ + 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] )); - } + 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); - if ((total_written != -1) && (pos + total_written > fsp->size)) - fsp->size = pos + total_written; - return total_written; - } + if(!wcp) { + DO_PROFILE_INC(writecache_direct_writes); + total_written = real_write_file(fsp, data, pos, n); + if ((total_written != -1) && (pos + total_written > fsp->size)) + fsp->size = pos + total_written; + return total_written; + } - DEBUG(9,("write_file(fd=%d pos=%.0f size=%u) wcp->offset=%.0f wcp->data_size=%u\n", - fsp->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigned int)wcp->data_size)); + DEBUG(9,("write_file (%s)(fd=%d pos=%.0f size=%u) wcp->offset=%.0f wcp->data_size=%u\n", + fsp->fsp_name, fsp->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigned int)wcp->data_size)); - /* - * 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 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) { + if (wcp->data_size) { - BOOL cache_flush_needed = False; + BOOL cache_flush_needed = False; - if ((pos >= wcp->offset) && (pos <= wcp->offset + wcp->data_size)) { + if ((pos >= wcp->offset) && (pos <= wcp->offset + wcp->data_size)) { - /* - * Start of write overlaps or abutts the existing data. - */ + /* + * Start of write overlaps or abutts the existing data. + */ - size_t data_used = MIN((wcp->alloc_size - (pos - wcp->offset)), n); + size_t data_used = MIN((wcp->alloc_size - (pos - wcp->offset)), n); - memcpy(wcp->data + (pos - wcp->offset), data, data_used); + memcpy(wcp->data + (pos - wcp->offset), data, data_used); - /* - * Update the current buffer size with the new data. - */ + /* + * 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; + if(pos + data_used > wcp->offset + wcp->data_size) + wcp->data_size = pos + data_used - wcp->offset; - /* - * Update the file size if changed. - */ + /* + * Update the file size if changed. + */ - if (wcp->offset + wcp->data_size > wcp->file_size) - fsp->size = wcp->file_size = wcp->offset + wcp->data_size; + if (wcp->offset + wcp->data_size > wcp->file_size) + fsp->size = wcp->file_size = wcp->offset + wcp->data_size; - /* - * If we used all the data then - * return here. - */ + /* + * If we used all the data then + * return here. + */ - if(n == data_used) - return n; - else - cache_flush_needed = True; + 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. - */ + /* + * 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; + data += data_used; + pos += data_used; + n -= data_used; - DO_PROFILE_INC(writecache_abutted_writes); - total_written = data_used; + DO_PROFILE_INC(writecache_abutted_writes); + total_written = data_used; - write_path = 1; + write_path = 1; - } else if ((pos < wcp->offset) && (pos + n > wcp->offset) && - (pos + n <= wcp->offset + wcp->alloc_size)) { + } else if ((pos < wcp->offset) && (pos + n > wcp->offset) && + (pos + n <= wcp->offset + wcp->alloc_size)) { - /* - * End of write overlaps the existing data. - */ + /* + * End of write overlaps the existing data. + */ - size_t data_used = pos + n - wcp->offset; + size_t data_used = pos + n - wcp->offset; - memcpy(wcp->data, data + n - data_used, data_used); + memcpy(wcp->data, data + n - data_used, data_used); - /* - * Update the current buffer size with the new data. - */ + /* + * Update the current buffer size with the new data. + */ - if(pos + n > wcp->offset + wcp->data_size) - wcp->data_size = pos + n - wcp->offset; + if(pos + n > wcp->offset + wcp->data_size) + wcp->data_size = pos + n - wcp->offset; - /* - * Update the file size if changed. - */ + /* + * Update the file size if changed. + */ - if (wcp->offset + wcp->data_size > wcp->file_size) - fsp->size = wcp->file_size = wcp->offset + wcp->data_size; + if (wcp->offset + wcp->data_size > wcp->file_size) + fsp->size = wcp->file_size = wcp->offset + wcp->data_size; - /* - * We don't need to move the start of data, but we - * cut down the amount left by the amount used. - */ + /* + * We don't need to move the start of data, but we + * cut down the amount left by the amount used. + */ - n -= data_used; + n -= data_used; - /* - * We cannot have used all the data here. - */ + /* + * We cannot have used all the data here. + */ - cache_flush_needed = True; + cache_flush_needed = True; - DO_PROFILE_INC(writecache_abutted_writes); - total_written = data_used; + DO_PROFILE_INC(writecache_abutted_writes); + total_written = data_used; - write_path = 2; + 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) ) { + } 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) ) { - /* - * 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. - */ + /* + * 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; + size_t data_used; - if(pos + n <= wcp->offset + wcp->alloc_size) - data_used = n; - else - data_used = wcp->offset + wcp->alloc_size - pos; + 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. - */ + /* + * Fill in the non-continuous area with zeros. + */ - memset(wcp->data + wcp->data_size, '\0', - pos - (wcp->offset + wcp->data_size) ); + memset(wcp->data + wcp->data_size, '\0', + pos - (wcp->offset + wcp->data_size) ); - memcpy(wcp->data + (pos - wcp->offset), data, data_used); + memcpy(wcp->data + (pos - wcp->offset), data, data_used); - /* - * Update the current buffer size with the new data. - */ + /* + * 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; + if(pos + data_used > wcp->offset + wcp->data_size) + wcp->data_size = pos + data_used - wcp->offset; - /* - * Update the file size if changed. - */ + /* + * Update the file size if changed. + */ - if (wcp->offset + wcp->data_size > wcp->file_size) - fsp->size = wcp->file_size = wcp->offset + wcp->data_size; + if (wcp->offset + wcp->data_size > wcp->file_size) + fsp->size = wcp->file_size = wcp->offset + wcp->data_size; - /* - * If we used all the data then - * return here. - */ + /* + * If we used all the data then + * return here. + */ - if(n == data_used) - return n; - else - cache_flush_needed = True; + 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. - */ + /* + * 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; + data += data_used; + pos += data_used; + n -= data_used; - DO_PROFILE_INC(writecache_abutted_writes); - total_written = data_used; + DO_PROFILE_INC(writecache_abutted_writes); + total_written = data_used; - write_path = 3; + write_path = 3; - } else { + } else { - /* - * Write is bigger than buffer, or there is no overlap on the - * low or high ends. - */ + /* + * 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 \ + DEBUG(9,("write_file: non cacheable write : fd = %d, pos = %.0f, len = %u, current cache pos = %.0f \ len = %u\n",fsp->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigned int)wcp->data_size )); - /* - * Update the file size if needed. - */ + /* + * Update the file size if needed. + */ - if(pos + n > wcp->file_size) - fsp->size = wcp->file_size = pos + n; + if(pos + n > wcp->file_size) + fsp->size = wcp->file_size = pos + n; - /* - * 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 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 ( n <= wcp->alloc_size && n > wcp->data_size) { + cache_flush_needed = True; + } else { + ssize_t ret = real_write_file(fsp, data, pos, n); - DO_PROFILE_INC(writecache_direct_writes); - if (ret == -1) - return ret; + DO_PROFILE_INC(writecache_direct_writes); + if (ret == -1) + return ret; - if (pos + ret > wcp->file_size) - fsp->size = wcp->file_size = pos + ret; + if (pos + ret > wcp->file_size) + fsp->size = wcp->file_size = pos + ret; - return ret; - } + return ret; + } - write_path = 4; + write_path = 4; - } + } - if(wcp->data_size > wcp->file_size) - fsp->size = wcp->file_size = wcp->data_size; + if(wcp->data_size > wcp->file_size) + fsp->size = wcp->file_size = wcp->data_size; - if (cache_flush_needed) { - DEBUG(3,("WRITE_FLUSH:%d: due to noncontinuous write: fd = %d, size = %.0f, pos = %.0f, \ + 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->fd, (double)wcp->file_size, (double)pos, (unsigned int)n, - (double)wcp->offset, (unsigned int)wcp->data_size )); + write_path, fsp->fd, (double)wcp->file_size, (double)pos, (unsigned int)n, + (double)wcp->offset, (unsigned int)wcp->data_size )); - flush_write_cache(fsp, WRITE_FLUSH); - } - } + flush_write_cache(fsp, WRITE_FLUSH); + } + } - /* - * If the write request is bigger than the cache - * size, write it all out. - */ + /* + * 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 (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) - fsp->size = wcp->file_size = pos + n; + if (pos + ret > wcp->file_size) + fsp->size = wcp->file_size = pos + n; - DO_PROFILE_INC(writecache_direct_writes); - return total_written + n; - } + DO_PROFILE_INC(writecache_direct_writes); + return total_written + n; + } - /* - * If there's any data left, cache it. - */ + /* + * If there's any data left, cache it. + */ - if (n) { + if (n) { #ifdef WITH_PROFILE - if (wcp->data_size) { - DO_PROFILE_INC(writecache_abutted_writes); - } else { - DO_PROFILE_INC(writecache_init_writes); - } + 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) - fsp->size = wcp->file_size = wcp->offset + wcp->data_size; - 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 :) */ - } + 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) + fsp->size = wcp->file_size = wcp->offset + wcp->data_size; + 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; + return total_written; } /**************************************************************************** @@ -514,24 +525,23 @@ n = %u, wcp->offset=%.0f, wcp->data_size=%u\n", void delete_write_cache(files_struct *fsp) { - write_cache *wcp; - - if(!fsp) - return; + write_cache *wcp; - if(!(wcp = fsp->wcp)) - return; + if(!fsp) + return; - DO_PROFILE_DEC(writecache_allocated_write_caches); - allocated_write_caches--; + if(!(wcp = fsp->wcp)) + return; - SMB_ASSERT(wcp->data_size == 0); + DO_PROFILE_DEC(writecache_allocated_write_caches); + allocated_write_caches--; - SAFE_FREE(wcp->data); - SAFE_FREE(fsp->wcp); + SMB_ASSERT(wcp->data_size == 0); - DEBUG(10,("delete_write_cache: File %s deleted write cache\n", fsp->fsp_name )); + SAFE_FREE(wcp->data); + SAFE_FREE(fsp->wcp); + DEBUG(10,("delete_write_cache: File %s deleted write cache\n", fsp->fsp_name )); } /**************************************************************************** @@ -540,41 +550,41 @@ void delete_write_cache(files_struct *fsp) 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 = (write_cache *)malloc(sizeof(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 = 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 %u\n", + 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 = (write_cache *)malloc(sizeof(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 = 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 %u\n", fsp->fsp_name, wcp->alloc_size )); - return True; + return True; } /**************************************************************************** @@ -583,17 +593,17 @@ static BOOL setup_write_cache(files_struct *fsp, SMB_OFF_T file_size) void set_filelen_write_cache(files_struct *fsp, SMB_OFF_T file_size) { - fsp->size = 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 \ + fsp->size = 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 = %u\n", fsp->fsp_name, fsp->wcp->data_size ); - smb_panic(msg); - } - fsp->wcp->file_size = file_size; - } + smb_panic(msg); + } + fsp->wcp->file_size = file_size; + } } /******************************************************************* @@ -602,36 +612,36 @@ on file %s with write cache size = %u\n", fsp->fsp_name, fsp->wcp->data_size ); 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; + write_cache *wcp = fsp->wcp; + size_t data_size; + ssize_t ret; - if(!wcp || !wcp->data_size) - return 0; + if(!wcp || !wcp->data_size) + return 0; - data_size = wcp->data_size; - wcp->data_size = 0; + data_size = wcp->data_size; + wcp->data_size = 0; - DO_PROFILE_DEC_INC(writecache_num_write_caches,writecache_flushed_writes[reason]); + 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->fd, (double)wcp->offset, (unsigned int)data_size)); + DEBUG(9,("flushing write cache: fd = %d, off=%.0f, size=%u\n", + fsp->fd, (double)wcp->offset, (unsigned int)data_size)); #ifdef WITH_PROFILE - if(data_size == wcp->alloc_size) - DO_PROFILE_INC(writecache_num_perfect_writes); + 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); + ret = real_write_file(fsp, wcp->data, wcp->offset, data_size); - /* - * Ensure file size if kept up to date if write extends file. - */ + /* + * 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; + if ((ret != -1) && (wcp->offset + ret > wcp->file_size)) + wcp->file_size = wcp->offset + ret; - return ret; + return ret; } /******************************************************************* @@ -640,12 +650,13 @@ sync a file void sync_file(connection_struct *conn, files_struct *fsp) { - if(lp_strict_sync(SNUM(conn)) && fsp->fd != -1) { - flush_write_cache(fsp, SYNC_FLUSH); - conn->vfs_ops.fsync(fsp,fsp->fd); - } + if(lp_strict_sync(SNUM(conn)) && fsp->fd != -1) { + flush_write_cache(fsp, SYNC_FLUSH); + conn->vfs_ops.fsync(fsp,fsp->fd); + } } + /************************************************************ Perform a stat whether a valid fd or not. ************************************************************/ |