linux-kernel - [PATCH v2 46/46] staging/lustre: lov_io

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Message-Id: <1459381747-2886687-47-git-send-email-green@linuxhacker.ru>
Date:	Wed, 30 Mar 2016 19:49:07 -0400
From:	green@...uxhacker.ru
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org,
	Andreas Dilger <andreas.dilger@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lustre Development List <lustre-devel@...ts.lustre.org>,
	Bobi Jam <bobijam.xu@...el.com>,
	Oleg Drokin <green@...uxhacker.ru>
Subject: [PATCH v2 46/46] staging/lustre: lov_io_init() should return error code

From: Bobi Jam <bobijam.xu@...el.com>

lov_io_init_empty/release() should returns error code instead of
true on error case.

Fault IO needs to handle restart in the case of accessing HSM released
file

Signed-off-by: Bobi Jam <bobijam.xu@...el.com>
Reviewed-on: http://review.whamcloud.com/17240
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7446
Reviewed-by: John L. Hammond <john.hammond@...el.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@...el.com>
Signed-off-by: Oleg Drokin <green@...uxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/llite_mmap.c | 4 ++++
 drivers/staging/lustre/lustre/lov/lov_io.c       | 4 ++--
 drivers/staging/lustre/lustre/obdclass/cl_io.c   | 1 +
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/llite_mmap.c b/drivers/staging/lustre/lustre/llite/llite_mmap.c
index 83d7006..5b4382c 100644
--- a/drivers/staging/lustre/lustre/llite/llite_mmap.c
+++ b/drivers/staging/lustre/lustre/llite/llite_mmap.c
@@ -123,6 +123,7 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 
 	*env_ret = env;
 
+restart:
 	io = vvp_env_thread_io(env);
 	io->ci_obj = ll_i2info(inode)->lli_clob;
 	LASSERT(io->ci_obj);
@@ -157,6 +158,9 @@ ll_fault_io_init(struct vm_area_struct *vma, struct lu_env **env_ret,
 	} else {
 		LASSERT(rc < 0);
 		cl_io_fini(env, io);
+		if (io->ci_need_restart)
+			goto restart;
+
 		cl_env_nested_put(nest, env);
 		io = ERR_PTR(rc);
 	}
diff --git a/drivers/staging/lustre/lustre/lov/lov_io.c b/drivers/staging/lustre/lustre/lov/lov_io.c
index ba79955..4151237 100644
--- a/drivers/staging/lustre/lustre/lov/lov_io.c
+++ b/drivers/staging/lustre/lustre/lov/lov_io.c
@@ -916,7 +916,7 @@ int lov_io_init_empty(const struct lu_env *env, struct cl_object *obj,
 	}
 
 	io->ci_result = result < 0 ? result : 0;
-	return result != 0;
+	return result;
 }
 
 int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
@@ -959,7 +959,7 @@ int lov_io_init_released(const struct lu_env *env, struct cl_object *obj,
 	}
 
 	io->ci_result = result < 0 ? result : 0;
-	return result != 0;
+	return result;
 }
 
 /** @} lov */
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_io.c b/drivers/staging/lustre/lustre/obdclass/cl_io.c
index 7655dc4..f4b3178 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_io.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_io.c
@@ -133,6 +133,7 @@ void cl_io_fini(const struct lu_env *env, struct cl_io *io)
 	case CIT_WRITE:
 		break;
 	case CIT_FAULT:
+		break;
 	case CIT_FSYNC:
 		LASSERT(!io->ci_need_restart);
 		break;
-- 
2.1.0