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path: root/fs/xfs/libxfs/xfs_inode_fork.c
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Diffstat (limited to 'fs/xfs/libxfs/xfs_inode_fork.c')
-rw-r--r--fs/xfs/libxfs/xfs_inode_fork.c70
1 files changed, 66 insertions, 4 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
index bbcc8c7a44b3..5dd56d3dbb3a 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -121,6 +121,26 @@ xfs_iformat_fork(
return -EFSCORRUPTED;
}
+ if (unlikely(xfs_is_reflink_inode(ip) &&
+ (VFS_I(ip)->i_mode & S_IFMT) != S_IFREG)) {
+ xfs_warn(ip->i_mount,
+ "corrupt dinode %llu, wrong file type for reflink.",
+ ip->i_ino);
+ XFS_CORRUPTION_ERROR("xfs_iformat(reflink)",
+ XFS_ERRLEVEL_LOW, ip->i_mount, dip);
+ return -EFSCORRUPTED;
+ }
+
+ if (unlikely(xfs_is_reflink_inode(ip) &&
+ (ip->i_d.di_flags & XFS_DIFLAG_REALTIME))) {
+ xfs_warn(ip->i_mount,
+ "corrupt dinode %llu, has reflink+realtime flag set.",
+ ip->i_ino);
+ XFS_CORRUPTION_ERROR("xfs_iformat(reflink)",
+ XFS_ERRLEVEL_LOW, ip->i_mount, dip);
+ return -EFSCORRUPTED;
+ }
+
switch (VFS_I(ip)->i_mode & S_IFMT) {
case S_IFIFO:
case S_IFCHR:
@@ -186,9 +206,14 @@ xfs_iformat_fork(
XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount);
return -EFSCORRUPTED;
}
- if (error) {
+ if (error)
return error;
+
+ if (xfs_is_reflink_inode(ip)) {
+ ASSERT(ip->i_cowfp == NULL);
+ xfs_ifork_init_cow(ip);
}
+
if (!XFS_DFORK_Q(dip))
return 0;
@@ -208,7 +233,8 @@ xfs_iformat_fork(
XFS_CORRUPTION_ERROR("xfs_iformat(8)",
XFS_ERRLEVEL_LOW,
ip->i_mount, dip);
- return -EFSCORRUPTED;
+ error = -EFSCORRUPTED;
+ break;
}
error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size);
@@ -226,6 +252,9 @@ xfs_iformat_fork(
if (error) {
kmem_zone_free(xfs_ifork_zone, ip->i_afp);
ip->i_afp = NULL;
+ if (ip->i_cowfp)
+ kmem_zone_free(xfs_ifork_zone, ip->i_cowfp);
+ ip->i_cowfp = NULL;
xfs_idestroy_fork(ip, XFS_DATA_FORK);
}
return error;
@@ -740,6 +769,9 @@ xfs_idestroy_fork(
if (whichfork == XFS_ATTR_FORK) {
kmem_zone_free(xfs_ifork_zone, ip->i_afp);
ip->i_afp = NULL;
+ } else if (whichfork == XFS_COW_FORK) {
+ kmem_zone_free(xfs_ifork_zone, ip->i_cowfp);
+ ip->i_cowfp = NULL;
}
}
@@ -927,6 +959,19 @@ xfs_iext_get_ext(
}
}
+/* Convert bmap state flags to an inode fork. */
+struct xfs_ifork *
+xfs_iext_state_to_fork(
+ struct xfs_inode *ip,
+ int state)
+{
+ if (state & BMAP_COWFORK)
+ return ip->i_cowfp;
+ else if (state & BMAP_ATTRFORK)
+ return ip->i_afp;
+ return &ip->i_df;
+}
+
/*
* Insert new item(s) into the extent records for incore inode
* fork 'ifp'. 'count' new items are inserted at index 'idx'.
@@ -939,7 +984,7 @@ xfs_iext_insert(
xfs_bmbt_irec_t *new, /* items to insert */
int state) /* type of extent conversion */
{
- xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df;
+ xfs_ifork_t *ifp = xfs_iext_state_to_fork(ip, state);
xfs_extnum_t i; /* extent record index */
trace_xfs_iext_insert(ip, idx, new, state, _RET_IP_);
@@ -1189,7 +1234,7 @@ xfs_iext_remove(
int ext_diff, /* number of extents to remove */
int state) /* type of extent conversion */
{
- xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df;
+ xfs_ifork_t *ifp = xfs_iext_state_to_fork(ip, state);
xfs_extnum_t nextents; /* number of extents in file */
int new_size; /* size of extents after removal */
@@ -1934,3 +1979,20 @@ xfs_iext_irec_update_extoffs(
ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff;
}
}
+
+/*
+ * Initialize an inode's copy-on-write fork.
+ */
+void
+xfs_ifork_init_cow(
+ struct xfs_inode *ip)
+{
+ if (ip->i_cowfp)
+ return;
+
+ ip->i_cowfp = kmem_zone_zalloc(xfs_ifork_zone,
+ KM_SLEEP | KM_NOFS);
+ ip->i_cowfp->if_flags = XFS_IFEXTENTS;
+ ip->i_cformat = XFS_DINODE_FMT_EXTENTS;
+ ip->i_cnextents = 0;
+}