From d86fc3ec8c99aaa5ffaa14a97525154507c39df7 Mon Sep 17 00:00:00 2001 From: Alexander Bokovoy Date: Wed, 16 Jan 2008 12:17:03 +0300 Subject: Add support for offline files support, remote storage, and Async I/O force operations to VFS Offline files support and remote storage are for allowing communication with backup and archiving tools that mark files moved to a tape library as offline. We translate this info into corresponding CIFS offline file attribute and mark an exported volume as remote storage. Async I/O force is to allow selective redirection of I/O operations to asynchronous processing in case it is viable at VFS module discretion. It is needed for proper handling of offline files as performing regular I/O on offline file will block smbd. Signed-off-by: Alexander Bokovoy (This used to be commit 875208724e39564fe81385dfe36e6c963e79e101) --- source3/smbd/reply.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'source3/smbd/reply.c') diff --git a/source3/smbd/reply.c b/source3/smbd/reply.c index e2316ef1200..381ddfe1517 100644 --- a/source3/smbd/reply.c +++ b/source3/smbd/reply.c @@ -3329,8 +3329,12 @@ void reply_read_and_X(struct smb_request *req) return; } - if (!big_readX - && schedule_aio_read_and_X(conn, req, fsp, startpos, smb_maxcnt)) { + /* It is possible for VFS modules to selectively decide whether Async I/O should be used + for the file or not. + */ + if ((SMB_VFS_AIO_FORCE(fsp)) && + !big_readX && + schedule_aio_read_and_X(conn, req, fsp, startpos, smb_maxcnt)) { END_PROFILE(SMBreadX); return; } @@ -4001,13 +4005,16 @@ void reply_write_and_X(struct smb_request *req) nwritten = 0; } else { - if (req->unread_bytes == 0 && - schedule_aio_write_and_X(conn, req, fsp, data, - startpos, numtowrite)) { + /* It is possible for VFS modules to selectively decide whether Async I/O + should be used for the file or not. + */ + if ((SMB_VFS_AIO_FORCE(fsp)) && (req->unread_bytes == 0) && + schedule_aio_write_and_X(conn, req, fsp, data, startpos, + numtowrite)) { END_PROFILE(SMBwriteX); return; } - + nwritten = write_file(req,fsp,data,startpos,numtowrite); } -- cgit