linux-kernel - [PATCH 4/5] xfs: use fs netlink interface for ENOSPC conditions

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Date:	Thu, 18 Aug 2011 14:18:25 +0200
From:	Lukas Czerner <lczerner@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, Lukas Czerner <lczerner@...hat.com>,
	Christoph Hellwig <hch@....de>, xfs@....sgi.com
Subject: [PATCH 4/5] xfs: use fs netlink interface for ENOSPC conditions

Register fs netlink interface and send proper warning if ENOSPC is
encountered. Note that we differentiate between enospc for metadata and
enospc for data.

Signed-off-by: Lukas Czerner <lczerner@...hat.com>
CC: Christoph Hellwig <hch@....de>
CC: xfs@....sgi.com
---
 fs/xfs/linux-2.6/xfs_file.c  |    2 ++
 fs/xfs/linux-2.6/xfs_super.c |    1 +
 fs/xfs/xfs_vnodeops.c        |   10 ++++++++--
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 7f7b424..ab41603 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -896,6 +896,8 @@ xfs_file_aio_write(
 out_unlock:
 	xfs_aio_write_newsize_update(ip);
 	xfs_rw_iunlock(ip, iolock);
+	if (unlikely(-ENOSPC == ret))
+		fs_nl_send_warning(inode->i_sb->s_dev, FS_NL_ENOSPC_WARN);
 	return ret;
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 9a72dda..dd167a0 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1731,6 +1731,7 @@ init_xfs_fs(void)
 	error = register_filesystem(&xfs_fs_type);
 	if (error)
 		goto out_sysctl_unregister;
+	init_fs_nl_family();
 	return 0;
 
  out_sysctl_unregister:
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 51fc429..1a95115 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -996,6 +996,8 @@ xfs_create(
  out_trans_abort:
 	cancel_flags |= XFS_TRANS_ABORT;
  out_trans_cancel:
+	if (ENOSPC == error)
+		fs_nl_send_warning(mp->m_super->s_dev, FS_NL_META_ENOSPC_WARN);
 	xfs_trans_cancel(tp, cancel_flags);
  out_release_inode:
 	/*
@@ -2302,7 +2304,7 @@ xfs_change_file_space(
 		error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
 						prealloc_type, attr_flags);
 		if (error)
-			return error;
+			goto alloc_failed;
 		setprealloc = 1;
 		break;
 
@@ -2321,7 +2323,7 @@ xfs_change_file_space(
 			error = xfs_alloc_file_space(ip, fsize,
 					startoffset - fsize, 0, attr_flags);
 			if (error)
-				break;
+				goto alloc_failed;
 		}
 
 		iattr.ia_valid = ATTR_SIZE;
@@ -2384,5 +2386,9 @@ xfs_change_file_space(
 
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
+alloc_failed:
+	if (unlikely(ENOSPC == error))
+		fs_nl_send_warning(mp->m_super->s_dev, FS_NL_ENOSPC_WARN);
+
 	return error;
 }
-- 
1.7.4.4

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