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Commit 91962d0f authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag '5.3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 

Pull cifs fixes from Steve French:
 "Two fixes for stable, one that had dependency on earlier patch in this
  merge window and can now go in, and a perf improvement in SMB3 open"

* tag '5.3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module number
  cifs: flush before set-info if we have writeable handles
  smb3: optimize open to not send query file internal info
  cifs: copy_file_range needs to strip setuid bits and update timestamps
  CIFS: fix deadlock in cached root handling
parents 8cf66504 2a957ace

fs/cifs/cifsfs.c

+8 −3
Original line number Diff line number Diff line
@@ -1104,6 +1104,10 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, 
		goto out;

	}



	rc = -EOPNOTSUPP;

	if (!target_tcon->ses->server->ops->copychunk_range)

		goto out;



	/*

	 * Note: cifs case is easier than btrfs since server responsible for

	 * checks for proper open modes and file type and if it wants
@@ -1115,11 +1119,12 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, 
	/* should we flush first and last page first */

	truncate_inode_pages(&target_inode->i_data, 0);



	if (target_tcon->ses->server->ops->copychunk_range)

	rc = file_modified(dst_file);

	if (!rc)

		rc = target_tcon->ses->server->ops->copychunk_range(xid,

			smb_file_src, smb_file_target, off, len, destoff);

	else

		rc = -EOPNOTSUPP;



	file_accessed(src_file);



	/* force revalidate of size and timestamps of target file now

	 * that target is updated on the server

fs/cifs/cifsfs.h

+1 −1
Original line number Diff line number Diff line
@@ -152,5 +152,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); 
extern const struct export_operations cifs_export_ops;

#endif /* CONFIG_CIFS_NFSD_EXPORT */



#define CIFS_VERSION   "2.20"

#define CIFS_VERSION   "2.21"

#endif				/* _CIFSFS_H */

fs/cifs/inode.c

+16 −0
Original line number Diff line number Diff line
@@ -2406,6 +2406,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) 
	struct inode *inode = d_inode(direntry);

	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);

	struct cifsInodeInfo *cifsInode = CIFS_I(inode);

	struct cifsFileInfo *wfile;

	struct cifs_tcon *tcon;

	char *full_path = NULL;

	int rc = -EACCES;

	__u32 dosattr = 0;
@@ -2452,6 +2454,20 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) 
	mapping_set_error(inode->i_mapping, rc);

	rc = 0;



	if (attrs->ia_valid & ATTR_MTIME) {

		rc = cifs_get_writable_file(cifsInode, false, &wfile);

		if (!rc) {

			tcon = tlink_tcon(wfile->tlink);

			rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid);

			cifsFileInfo_put(wfile);

			if (rc)

				return rc;

		} else if (rc != -EBADF)

			return rc;

		else

			rc = 0;

	}



	if (attrs->ia_valid & ATTR_SIZE) {

		rc = cifs_set_file_size(inode, attrs, xid, full_path);

		if (rc != 0)

fs/cifs/smb2file.c

+12 −6
Original line number Diff line number Diff line
@@ -88,15 +88,21 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, 
	}



	if (buf) {

		/* open response does not have IndexNumber field - get it */

		rc = SMB2_get_srv_num(xid, oparms->tcon, fid->persistent_fid,

		/* if open response does not have IndexNumber field - get it */

		if (smb2_data->IndexNumber == 0) {

			rc = SMB2_get_srv_num(xid, oparms->tcon,

				      fid->persistent_fid,

				      fid->volatile_fid,

				      &smb2_data->IndexNumber);

			if (rc) {

			/* let get_inode_info disable server inode numbers */

				/*

				 * let get_inode_info disable server inode

				 * numbers

				 */

				smb2_data->IndexNumber = 0;

				rc = 0;

			}

		}

		move_smb2_info_to_cifs(buf, smb2_data);

	}

fs/cifs/smb2ops.c

+49 −4
Original line number Diff line number Diff line
@@ -694,8 +694,51 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) 


	smb2_set_related(&rqst[1]);



	/*

	 * We do not hold the lock for the open because in case

	 * SMB2_open needs to reconnect, it will end up calling

	 * cifs_mark_open_files_invalid() which takes the lock again

	 * thus causing a deadlock

	 */



	mutex_unlock(&tcon->crfid.fid_mutex);

	rc = compound_send_recv(xid, ses, flags, 2, rqst,

				resp_buftype, rsp_iov);

	mutex_lock(&tcon->crfid.fid_mutex);



	/*

	 * Now we need to check again as the cached root might have

	 * been successfully re-opened from a concurrent process

	 */



	if (tcon->crfid.is_valid) {

		/* work was already done */



		/* stash fids for close() later */

		struct cifs_fid fid = {

			.persistent_fid = pfid->persistent_fid,

			.volatile_fid = pfid->volatile_fid,

		};



		/*

		 * caller expects this func to set pfid to a valid

		 * cached root, so we copy the existing one and get a

		 * reference.

		 */

		memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));

		kref_get(&tcon->crfid.refcount);



		mutex_unlock(&tcon->crfid.fid_mutex);



		if (rc == 0) {

			/* close extra handle outside of crit sec */

			SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);

		}

		goto oshr_free;

	}



	/* Cached root is still invalid, continue normaly */



	if (rc)

		goto oshr_exit;
@@ -711,11 +754,12 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) 
	tcon->crfid.is_valid = true;

	kref_init(&tcon->crfid.refcount);



	/* BB TBD check to see if oplock level check can be removed below */

	if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {

		kref_get(&tcon->crfid.refcount);

		oplock = smb2_parse_lease_state(server, o_rsp,

		smb2_parse_contexts(server, o_rsp,

				&oparms.fid->epoch,

						oparms.fid->lease_key);

				oparms.fid->lease_key, &oplock, NULL);

	} else

		goto oshr_exit;
@@ -731,6 +775,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) 


oshr_exit:

	mutex_unlock(&tcon->crfid.fid_mutex);

oshr_free:

	SMB2_open_free(&rqst[0]);

	SMB2_query_info_free(&rqst[1]);

	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);