Linux: Add support for Lustre FID2PATH ioctl (#331829)

This is a modified version of a patch provided by Frank Zago (fzago@cray.com).

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14233

diff --git a/coregrind/m_syswrap/syswrap-linux.c b/coregrind/m_syswrap/syswrap-linux.c
index 20b6d0e1cea7cacb07aafbddd2d2efb704d7cfc9..619a09610404db45932d054ea696090ce21618a1 100644 (file)
--- a/coregrind/m_syswrap/syswrap-linux.c
+++ b/coregrind/m_syswrap/syswrap-linux.c
@@ -7069,6 +7069,12 @@ PRE(sys_ioctl)
    }
 #endif
 
+   /* To do: figure out which software layer extends the sign of 'request' */
+   case VKI_OBD_IOC_FID2PATH:
+      PRE_MEM_READ("VKI_OBD_IOC_FID2PATH(args)", ARG3,
+                   sizeof(struct vki_getinfo_fid2path));
+      break;
+
    default:
       /* EVIOC* are variable length and return size written on success */
       switch (ARG2 & ~(_VKI_IOC_SIZEMASK << _VKI_IOC_SIZESHIFT)) {
@@ -8358,6 +8364,13 @@ POST(sys_ioctl)
       break;
 #endif
 
+   /* To do: figure out which software layer extends the sign of 'request' */
+   case VKI_OBD_IOC_FID2PATH: {
+       struct vki_getinfo_fid2path *args = (void *)(ARG3);
+       POST_MEM_WRITE((Addr)args->gf_path, args->gf_pathlen);
+      }
+      break;
+
    default:
       /* EVIOC* are variable length and return size written on success */
       switch (ARG2 & ~(_VKI_IOC_SIZEMASK << _VKI_IOC_SIZESHIFT)) {

diff --git a/include/vki/vki-linux.h b/include/vki/vki-linux.h
index 6043842f86934af9da1eb8934837c6cb2f36b955..f4e8669980826760ac55577f11c892d4483f9ba5 100644 (file)
--- a/include/vki/vki-linux.h
+++ b/include/vki/vki-linux.h
@@ -3420,6 +3420,40 @@ struct vki_ethtool_ts_info {
 #define VKI_ETHTOOL_SCHANNELS  0x0000003d /* Set no of channels */
 #define VKI_ETHTOOL_GET_TS_INFO        0x00000041 /* Get time stamping and PHC info */
 
+//----------------------------------------------------------------------
+// From drivers/staging/lustre/lustre/include/lustre/lustre_user.h
+//----------------------------------------------------------------------
+
+struct vki_lu_fid {
+       __vki_u64       f_seq;
+       __vki_u32       f_oid;
+       __vki_u32       f_ver;
+};
+
+//----------------------------------------------------------------------
+// From drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+//----------------------------------------------------------------------
+
+struct vki_getinfo_fid2path {
+       struct vki_lu_fid       gf_fid;
+       __vki_u64               gf_recno;
+       __vki_u32               gf_linkno;
+       __vki_u32               gf_pathlen;
+       char                    gf_path[0];
+} __attribute__((packed));
+
+//----------------------------------------------------------------------
+// From drivers/staging/lustre/lustre/include/linux/lustre_lib.h
+//----------------------------------------------------------------------
+
+#define OBD_IOC_DATA_TYPE               long
+
+//----------------------------------------------------------------------
+// From drivers/staging/lustre/lustre/include/lustre_lib.h
+//----------------------------------------------------------------------
+
+#define VKI_OBD_IOC_FID2PATH            _VKI_IOWR ('f', 150, OBD_IOC_DATA_TYPE)
+
 #endif // __VKI_LINUX_H
 
 /*--------------------------------------------------------------------*/