[PATCH 7/7] xfs: assert that we hold the ilock for extent map access

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

Make sure that xfs_bmapi_read has the ilock held in some way, and that
xfs_bmapi_write, xfs_bmapi_delay, xfs_bunmapi and xfs_iread_extents are
called with the ilock held exclusively.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/xfs_bmap.c
===================================================================
--- xfs.orig/fs/xfs/xfs_bmap.c  2013-11-29 14:25:12.172459195 +0100
+++ xfs/fs/xfs/xfs_bmap.c       2013-12-05 10:03:28.243801633 +0100
@@ -3997,6 +3997,7 @@ xfs_bmapi_read(
        ASSERT(*nmap >= 1);
        ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE|
                           XFS_BMAPI_IGSTATE)));
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL));
 
        if (unlikely(XFS_TEST_ERROR(
            (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
@@ -4191,6 +4192,7 @@ xfs_bmapi_delay(
        ASSERT(*nmap >= 1);
        ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
        ASSERT(!(flags & ~XFS_BMAPI_ENTIRE));
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 
        if (unlikely(XFS_TEST_ERROR(
            (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS &&
@@ -4484,6 +4486,7 @@ xfs_bmapi_write(
        ASSERT(tp != NULL);
        ASSERT(len > 0);
        ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL);
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 
        if (unlikely(XFS_TEST_ERROR(
            (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
Index: xfs/fs/xfs/xfs_inode_fork.c
===================================================================
--- xfs.orig/fs/xfs/xfs_inode_fork.c    2013-12-05 09:57:24.347809100 +0100
+++ xfs/fs/xfs/xfs_inode_fork.c 2013-12-05 09:59:04.767807039 +0100
@@ -431,6 +431,8 @@ xfs_iread_extents(
        xfs_ifork_t     *ifp;
        xfs_extnum_t    nextents;
 
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
        if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
                XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW,
                                 ip->i_mount);
Index: xfs/fs/xfs/xfs_bmap.c
===================================================================
--- xfs.orig/fs/xfs/xfs_bmap.c  2013-12-05 22:12:32.931838271 +0100
+++ xfs/fs/xfs/xfs_bmap.c       2013-12-05 22:35:59.175809412 +0100
@@ -5038,6 +5038,7 @@ xfs_bunmapi(
        if (XFS_FORCED_SHUTDOWN(mp))
                return XFS_ERROR(EIO);
 
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
        ASSERT(len > 0);
        ASSERT(nexts >= 0);