xfs: assert that we hold the ilock for extent map access

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@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 8401f11..dbf2738 100644 (file)
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4002,6 +4002,7 @@ 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 &&
@@ -4196,6 +4197,7 @@ 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 &&
@@ -4489,6 +4491,7 @@ 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 &&
@@ -5040,6 +5043,7 @@ xfs_bunmapi(
        if (XFS_FORCED_SHUTDOWN(mp))
                return XFS_ERROR(EIO);
 
+       ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
        ASSERT(len > 0);
        ASSERT(nexts >= 0);
 

diff --git a/fs/xfs/xfs_inode_fork.c b/fs/xfs/xfs_inode_fork.c
index cfee14a..e16985e 100644 (file)
--- a/fs/xfs/xfs_inode_fork.c
+++ b/fs/xfs/xfs_inode_fork.c
@@ -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);