LU-10810 clio: SEEK_HOLE/SEEK_DATA on client side

[fs/lustre-release.git] / lustre / ptlrpc / sec_ctx.c

diff --git a/lustre/ptlrpc/sec_ctx.c b/lustre/ptlrpc/sec_ctx.c
index 9f426b8..6342749 100644 (file)
--- a/lustre/ptlrpc/sec_ctx.c
+++ b/lustre/ptlrpc/sec_ctx.c
@@ -27,6 +27,7 @@
 #define DEBUG_SUBSYSTEM S_FILTER
 
 #include <linux/fs.h>
+#include <linux/fs_struct.h>
 #include <libcfs/libcfs.h>
 #include <lvfs.h>
 #include <obd_class.h>
@@ -46,6 +47,26 @@
 # define ASSERT_KERNEL_CTXT(msg) do {} while(0)
 #endif
 
+static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
+                                struct dentry *dentry)
+{
+       struct path path;
+       struct path old_pwd;
+
+       path.mnt = mnt;
+       path.dentry = dentry;
+       path_get(&path);
+       spin_lock(&fs->lock);
+       write_seqcount_begin(&fs->seq);
+       old_pwd = fs->pwd;
+       fs->pwd = path;
+       write_seqcount_end(&fs->seq);
+       spin_unlock(&fs->lock);
+
+       if (old_pwd.dentry)
+               path_put(&old_pwd);
+}
+
 /* push / pop to root of obd store */
 void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx)
 {