'smb3 client fixes

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Merge tag '6.11-rc1-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fixes from Steve French:

 - two reparse point fixes

 - minor cleanup

 - additional trace point (to help debug a recent problem)

* tag '6.11-rc1-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal version number
  smb: client: fix FSCTL_GET_REPARSE_POINT against NetApp
  smb3: add dynamic tracepoints for shutdown ioctl
  cifs: Remove cifs_aio_ctx
  smb: client: handle lack of FSCTL_GET_REPARSE_POINT support

fs/smb/client/cifsfs.h

@@ -147,6 +147,6 @@ extern const struct export_operations cifs_export_ops;
 #endif /* CONFIG_CIFS_NFSD_EXPORT */
 
 /* when changing internal version - update following two lines at same time */
-#define SMB3_PRODUCT_BUILD 49
-#define CIFS_VERSION   "2.49"
+#define SMB3_PRODUCT_BUILD 50
+#define CIFS_VERSION   "2.50"
 #endif				/* _CIFSFS_H */

fs/smb/client/cifsglob.h

@@ -1471,29 +1471,6 @@ struct cifs_io_parms {
 	struct TCP_Server_Info *server;
 };
 
-struct cifs_aio_ctx {
-	struct kref		refcount;
-	struct list_head	list;
-	struct mutex		aio_mutex;
-	struct completion	done;
-	struct iov_iter		iter;
-	struct kiocb		*iocb;
-	struct cifsFileInfo	*cfile;
-	struct bio_vec		*bv;
-	loff_t			pos;
-	unsigned int		nr_pinned_pages;
-	ssize_t			rc;
-	unsigned int		len;
-	unsigned int		total_len;
-	unsigned int		bv_need_unpin;	/* If ->bv[] needs unpinning */
-	bool			should_dirty;
-	/*
-	 * Indicates if this aio_ctx is for direct_io,
-	 * If yes, iter is a copy of the user passed iov_iter
-	 */
-	bool			direct_io;
-};
-
 struct cifs_io_request {
 	struct netfs_io_request		rreq;
 	struct cifsFileInfo		*cfile;
@@ -2010,7 +1987,6 @@ require use of the stronger protocol */
  * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
  *				->invalidHandle			initiate_cifs_search
  *				->oplock_break_cancelled
- * cifs_aio_ctx->aio_mutex		cifs_aio_ctx			cifs_aio_ctx_alloc
  ****************************************************************************/
 
 #ifdef DECLARE_GLOBALS_HERE

fs/smb/client/cifsproto.h

@@ -619,8 +619,6 @@ int __cifs_calc_signature(struct smb_rqst *rqst,
 			struct shash_desc *shash);
 enum securityEnum cifs_select_sectype(struct TCP_Server_Info *,
 					enum securityEnum);
-struct cifs_aio_ctx *cifs_aio_ctx_alloc(void);
-void cifs_aio_ctx_release(struct kref *refcount);
 
 int cifs_alloc_hash(const char *name, struct shash_desc **sdesc);
 void cifs_free_hash(struct shash_desc **sdesc);

fs/smb/client/inode.c

@@ -1042,13 +1042,26 @@ static int reparse_info_to_fattr(struct cifs_open_info_data *data,
 	}
 
 	rc = -EOPNOTSUPP;
-	switch ((data->reparse.tag = tag)) {
-	case 0: /* SMB1 symlink */
+	data->reparse.tag = tag;
+	if (!data->reparse.tag) {
 		if (server->ops->query_symlink) {
 			rc = server->ops->query_symlink(xid, tcon,
 							cifs_sb, full_path,
 							&data->symlink_target);
 		}
+		if (rc == -EOPNOTSUPP)
+			data->reparse.tag = IO_REPARSE_TAG_INTERNAL;
+	}
+
+	switch (data->reparse.tag) {
+	case 0: /* SMB1 symlink */
+		break;
+	case IO_REPARSE_TAG_INTERNAL:
+		rc = 0;
+		if (le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY) {
+			cifs_create_junction_fattr(fattr, sb);
+			goto out;
+		}
 		break;
 	case IO_REPARSE_TAG_MOUNT_POINT:
 		cifs_create_junction_fattr(fattr, sb);

fs/smb/client/ioctl.c

@@ -170,7 +170,10 @@ static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
 static int cifs_shutdown(struct super_block *sb, unsigned long arg)
 {
 	struct cifs_sb_info *sbi = CIFS_SB(sb);
+	struct tcon_link *tlink;
+	struct cifs_tcon *tcon;
 	__u32 flags;
+	int rc;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
@@ -178,14 +181,21 @@ static int cifs_shutdown(struct super_block *sb, unsigned long arg)
 	if (get_user(flags, (__u32 __user *)arg))
 		return -EFAULT;
 
-	if (flags > CIFS_GOING_FLAGS_NOLOGFLUSH)
-		return -EINVAL;
+	tlink = cifs_sb_tlink(sbi);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+	tcon = tlink_tcon(tlink);
+
+	trace_smb3_shutdown_enter(flags, tcon->tid);
+	if (flags > CIFS_GOING_FLAGS_NOLOGFLUSH) {
+		rc = -EINVAL;
+		goto shutdown_out_err;
+	}
 
 	if (cifs_forced_shutdown(sbi))
-		return 0;
+		goto shutdown_good;
 
 	cifs_dbg(VFS, "shut down requested (%d)", flags);
-/*	trace_cifs_shutdown(sb, flags);*/
 
 	/*
 	 * see:
@@ -201,7 +211,8 @@ static int cifs_shutdown(struct super_block *sb, unsigned long arg)
 	 */
 	case CIFS_GOING_FLAGS_DEFAULT:
 		cifs_dbg(FYI, "shutdown with default flag not supported\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto shutdown_out_err;
 	/*
 	 * FLAGS_LOGFLUSH is easy since it asks to write out metadata (not
 	 * data) but metadata writes are not cached on the client, so can treat
@@ -210,11 +221,18 @@ static int cifs_shutdown(struct super_block *sb, unsigned long arg)
 	case CIFS_GOING_FLAGS_LOGFLUSH:
 	case CIFS_GOING_FLAGS_NOLOGFLUSH:
 		sbi->mnt_cifs_flags |= CIFS_MOUNT_SHUTDOWN;
-		return 0;
+		goto shutdown_good;
 	default:
-		return -EINVAL;
+		rc = -EINVAL;
+		goto shutdown_out_err;
 	}
+
+shutdown_good:
+	trace_smb3_shutdown_done(flags, tcon->tid);
 	return 0;
+shutdown_out_err:
+	trace_smb3_shutdown_err(rc, flags, tcon->tid);
+	return rc;
 }
 
 static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug_info __user *in)

fs/smb/client/misc.c

@@ -995,60 +995,6 @@ parse_DFS_referrals_exit:
 	return rc;
 }
 
-struct cifs_aio_ctx *
-cifs_aio_ctx_alloc(void)
-{
-	struct cifs_aio_ctx *ctx;
-
-	/*
-	 * Must use kzalloc to initialize ctx->bv to NULL and ctx->direct_io
-	 * to false so that we know when we have to unreference pages within
-	 * cifs_aio_ctx_release()
-	 */
-	ctx = kzalloc(sizeof(struct cifs_aio_ctx), GFP_KERNEL);
-	if (!ctx)
-		return NULL;
-
-	INIT_LIST_HEAD(&ctx->list);
-	mutex_init(&ctx->aio_mutex);
-	init_completion(&ctx->done);
-	kref_init(&ctx->refcount);
-	return ctx;
-}
-
-void
-cifs_aio_ctx_release(struct kref *refcount)
-{
-	struct cifs_aio_ctx *ctx = container_of(refcount,
-					struct cifs_aio_ctx, refcount);
-
-	cifsFileInfo_put(ctx->cfile);
-
-	/*
-	 * ctx->bv is only set if setup_aio_ctx_iter() was call successfuly
-	 * which means that iov_iter_extract_pages() was a success and thus
-	 * that we may have references or pins on pages that we need to
-	 * release.
-	 */
-	if (ctx->bv) {
-		if (ctx->should_dirty || ctx->bv_need_unpin) {
-			unsigned int i;
-
-			for (i = 0; i < ctx->nr_pinned_pages; i++) {
-				struct page *page = ctx->bv[i].bv_page;
-
-				if (ctx->should_dirty)
-					set_page_dirty(page);
-				if (ctx->bv_need_unpin)
-					unpin_user_page(page);
-			}
-		}
-		kvfree(ctx->bv);
-	}
-
-	kfree(ctx);
-}
-
 /**
  * cifs_alloc_hash - allocate hash and hash context together
  * @name: The name of the crypto hash algo

fs/smb/client/reparse.c

@@ -505,6 +505,10 @@ bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb,
 	}
 
 	switch (tag) {
+	case IO_REPARSE_TAG_INTERNAL:
+		if (!(fattr->cf_cifsattrs & ATTR_DIRECTORY))
+			return false;
+		fallthrough;
 	case IO_REPARSE_TAG_DFS:
 	case IO_REPARSE_TAG_DFSR:
 	case IO_REPARSE_TAG_MOUNT_POINT:

fs/smb/client/reparse.h

@@ -12,6 +12,12 @@
 #include "fs_context.h"
 #include "cifsglob.h"
 
+/*
+ * Used only by cifs.ko to ignore reparse points from files when client or
+ * server doesn't support FSCTL_GET_REPARSE_POINT.
+ */
+#define IO_REPARSE_TAG_INTERNAL ((__u32)~0U)
+
 static inline dev_t reparse_nfs_mkdev(struct reparse_posix_data *buf)
 {
 	u64 v = le64_to_cpu(*(__le64 *)buf->DataBuffer);
@@ -78,10 +84,19 @@ static inline u32 reparse_mode_wsl_tag(mode_t mode)
 static inline bool reparse_inode_match(struct inode *inode,
 				       struct cifs_fattr *fattr)
 {
+	struct cifsInodeInfo *cinode = CIFS_I(inode);
 	struct timespec64 ctime = inode_get_ctime(inode);
 
-	return (CIFS_I(inode)->cifsAttrs & ATTR_REPARSE) &&
-		CIFS_I(inode)->reparse_tag == fattr->cf_cifstag &&
+	/*
+	 * Do not match reparse tags when client or server doesn't support
+	 * FSCTL_GET_REPARSE_POINT.  @fattr->cf_cifstag should contain correct
+	 * reparse tag from query dir response but the client won't be able to
+	 * read the reparse point data anyway.  This spares us a revalidation.
+	 */
+	if (cinode->reparse_tag != IO_REPARSE_TAG_INTERNAL &&
+	    cinode->reparse_tag != fattr->cf_cifstag)
+		return false;
+	return (cinode->cifsAttrs & ATTR_REPARSE) &&
 		timespec64_equal(&ctime, &fattr->cf_ctime);
 }
 

fs/smb/client/smb2inode.c

@@ -930,6 +930,8 @@ int smb2_query_path_info(const unsigned int xid,
 
 	switch (rc) {
 	case 0:
+		rc = parse_create_response(data, cifs_sb, &out_iov[0]);
+		break;
 	case -EOPNOTSUPP:
 		/*
 		 * BB TODO: When support for special files added to Samba
@@ -948,7 +950,8 @@ int smb2_query_path_info(const unsigned int xid,
 			cmds[num_cmds++] = SMB2_OP_GET_REPARSE;
 
 		oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
-				     FILE_READ_ATTRIBUTES | FILE_READ_EA,
+				     FILE_READ_ATTRIBUTES |
+				     FILE_READ_EA | SYNCHRONIZE,
 				     FILE_OPEN, create_options |
 				     OPEN_REPARSE_POINT, ACL_NO_MODE);
 		cifs_get_readable_path(tcon, full_path, &cfile);
@@ -1256,7 +1259,8 @@ int smb2_query_reparse_point(const unsigned int xid,
 	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 
 	cifs_get_readable_path(tcon, full_path, &cfile);
-	oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES,
+	oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
+			     FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE,
 			     FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE);
 	rc = smb2_compound_op(xid, tcon, cifs_sb,
 			      full_path, &oparms, &in_iov,

fs/smb/client/trace.h

@@ -1388,7 +1388,7 @@ DECLARE_EVENT_CLASS(smb3_ioctl_class,
 		__entry->command = command;
 	),
 	TP_printk("xid=%u fid=0x%llx ioctl cmd=0x%x",
-		__entry->xid, __entry->fid, __entry->command)
+		  __entry->xid, __entry->fid, __entry->command)
 )
 
 #define DEFINE_SMB3_IOCTL_EVENT(name)        \
@@ -1400,9 +1400,58 @@ DEFINE_EVENT(smb3_ioctl_class, smb3_##name,  \
 
 DEFINE_SMB3_IOCTL_EVENT(ioctl);
 
+DECLARE_EVENT_CLASS(smb3_shutdown_class,
+	TP_PROTO(__u32 flags,
+		__u32 tid),
+	TP_ARGS(flags, tid),
+	TP_STRUCT__entry(
+		__field(__u32, flags)
+		__field(__u32, tid)
+	),
+	TP_fast_assign(
+		__entry->flags = flags;
+		__entry->tid = tid;
+	),
+	TP_printk("flags=0x%x tid=0x%x",
+		  __entry->flags, __entry->tid)
+)
 
+#define DEFINE_SMB3_SHUTDOWN_EVENT(name)        \
+DEFINE_EVENT(smb3_shutdown_class, smb3_##name,  \
+	TP_PROTO(__u32 flags,		     \
+		__u32 tid),		     \
+	TP_ARGS(flags, tid))
 
+DEFINE_SMB3_SHUTDOWN_EVENT(shutdown_enter);
+DEFINE_SMB3_SHUTDOWN_EVENT(shutdown_done);
 
+DECLARE_EVENT_CLASS(smb3_shutdown_err_class,
+	TP_PROTO(int rc,
+		__u32 flags,
+		__u32 tid),
+	TP_ARGS(rc, flags, tid),
+	TP_STRUCT__entry(
+		__field(int, rc)
+		__field(__u32, flags)
+		__field(__u32, tid)
+	),
+	TP_fast_assign(
+		__entry->rc = rc;
+		__entry->flags = flags;
+		__entry->tid = tid;
+	),
+	TP_printk("rc=%d flags=0x%x tid=0x%x",
+		__entry->rc, __entry->flags, __entry->tid)
+)
+
+#define DEFINE_SMB3_SHUTDOWN_ERR_EVENT(name)        \
+DEFINE_EVENT(smb3_shutdown_err_class, smb3_##name,  \
+	TP_PROTO(int rc,		     \
+		__u32 flags,		     \
+		__u32 tid),		     \
+	TP_ARGS(rc, flags, tid))
+
+DEFINE_SMB3_SHUTDOWN_ERR_EVENT(shutdown_err);
 
 DECLARE_EVENT_CLASS(smb3_credit_class,
 	TP_PROTO(__u64	currmid,