diff options
| -rw-r--r-- | fs/cifs/file.c | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 26fa50858aa..b1807fd1ac4 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -467,7 +467,7 @@ reopen_error_exit: int cifs_close(struct inode *inode, struct file *file) { int rc = 0; - int xid; + int xid, timeout; struct cifs_sb_info *cifs_sb; struct cifsTconInfo *pTcon; struct cifsFileInfo *pSMBFile = @@ -485,9 +485,9 @@ int cifs_close(struct inode *inode, struct file *file) /* no sense reconnecting to close a file that is already closed */ if (pTcon->tidStatus != CifsNeedReconnect) { - int timeout = 2; + timeout = 2; while ((atomic_read(&pSMBFile->wrtPending) != 0) - && (timeout < 1000) ) { + && (timeout <= 2048)) { /* Give write a better chance to get to server ahead of the close. We do not want to add a wait_q here as it would @@ -522,6 +522,23 @@ int cifs_close(struct inode *inode, struct file *file) list_del(&pSMBFile->flist); list_del(&pSMBFile->tlist); write_unlock(&GlobalSMBSeslock); + timeout = 10; + /* We waited above to give the SMBWrite a chance to issue + on the wire (so we do not get SMBWrite returning EBADF + if writepages is racing with close. Note that writepages + does not specify a file handle, so it is possible for a file + to be opened twice, and the application close the "wrong" + file handle - in these cases we delay long enough to allow + the SMBWrite to get on the wire before the SMB Close. + We allow total wait here over 45 seconds, more than + oplock break time, and more than enough to allow any write + to complete on the server, or to time out on the client */ + while ((atomic_read(&pSMBFile->wrtPending) != 0) + && (timeout <= 50000)) { + cERROR(1, ("writes pending, delay free of handle")); + msleep(timeout); + timeout *= 8; + } kfree(pSMBFile->search_resume_name); kfree(file->private_data); file->private_data = NULL; @@ -1031,22 +1048,24 @@ struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode) (open_file->pfile->f_flags & O_WRONLY))) { atomic_inc(&open_file->wrtPending); read_unlock(&GlobalSMBSeslock); - if ((open_file->invalidHandle) && - (!open_file->closePend) /* BB fixme -since the second clause can not be true remove it BB */) { + if (open_file->invalidHandle) { rc = cifs_reopen_file(open_file->pfile, FALSE); /* if it fails, try another handle - might be */ /* dangerous to hold up writepages with retry */ if (rc) { - cFYI(1, - ("failed on reopen file in wp")); + cFYI(1, ("wp failed on reopen file")); read_lock(&GlobalSMBSeslock); /* can not use this handle, no write pending on this one after all */ - atomic_dec - (&open_file->wrtPending); + atomic_dec(&open_file->wrtPending); continue; } } + if (open_file->closePend) { + read_lock(&GlobalSMBSeslock); + atomic_dec(&open_file->wrtPending); + continue; + } return open_file; } } |