mount/fuse: add mount-option "enable-ino32" for the native client

By default the GlusterFS-native client uses 64-bit inodes. Some 32-bit
applications can not handle these correctly. Introduce a client-side
mount option "enable-ino32" which causes the FUSE-client to squash the
64-bit inodes into a 32-bit value.

Change-Id: I3296d16528bfb50457b9675f6b8701234ed82ff0
BUG: 850352
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/3885
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

3 files changed, 40 insertions, 26 deletions

diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 65a479aed..726e500e9 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -306,7 +306,7 @@ fuse_entry_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         state->loc.path, buf->ia_ino);
 
                 buf->ia_blksize = this->ctx->page_size;
-                gf_fuse_stat2attr (buf, &feo.attr);
+                gf_fuse_stat2attr (buf, &feo.attr, priv->enable_ino32);
 
                 if (!buf->ia_ino) {
                         gf_log ("glusterfs-fuse", GF_LOG_WARNING,
@@ -513,7 +513,7 @@ fuse_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         prebuf->ia_ino);
 
                 postbuf->ia_blksize = this->ctx->page_size;
-                gf_fuse_stat2attr (postbuf, &fao.attr);
+                gf_fuse_stat2attr (postbuf, &fao.attr, priv->enable_ino32);
 
                 fao.attr_valid = calc_timeout_sec (priv->attribute_timeout);
                 fao.attr_valid_nsec =
@@ -565,7 +565,7 @@ fuse_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         buf->ia_ino);
 
                 buf->ia_blksize = this->ctx->page_size;
-                gf_fuse_stat2attr (buf, &fao.attr);
+                gf_fuse_stat2attr (buf, &fao.attr, priv->enable_ino32);
 
                 fao.attr_valid = calc_timeout_sec (priv->attribute_timeout);
                 fao.attr_valid_nsec =
@@ -847,7 +847,7 @@ fuse_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         statpost->ia_ino);
 
                 statpost->ia_blksize = this->ctx->page_size;
-                gf_fuse_stat2attr (statpost, &fao.attr);
+                gf_fuse_stat2attr (statpost, &fao.attr, priv->enable_ino32);
 
                 fao.attr_valid = calc_timeout_sec (priv->attribute_timeout);
                 fao.attr_valid_nsec =
@@ -1767,7 +1767,7 @@ fuse_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         state->loc.path, fd, buf->ia_ino);
 
                 buf->ia_blksize = this->ctx->page_size;
-                gf_fuse_stat2attr (buf, &feo.attr);
+                gf_fuse_stat2attr (buf, &feo.attr, priv->enable_ino32);
 
                 linked_inode = inode_link (inode, state->loc.parent,
                                            state->loc.name, buf);
@@ -4622,6 +4622,8 @@ init (xlator_t *this_xl)
 
 	GF_OPTION_INIT ("read-only", priv->read_only, bool, cleanup_exit);
 
+        GF_OPTION_INIT ("enable-ino32", priv->enable_ino32, bool, cleanup_exit);
+
         priv->fuse_dump_fd = -1;
         ret = dict_get_str (options, "dump-fuse", &value_string);
         if (ret == 0) {
@@ -4868,6 +4870,10 @@ struct volume_options options[] = {
 	  .type = GF_OPTION_TYPE_BOOL,
 	  .default_value = "false"
 	},
+	{ .key = {"enable-ino32"},
+	  .type = GF_OPTION_TYPE_BOOL,
+	  .default_value = "false"
+	},
         { .key  = {"background-qlen"},
           .type = GF_OPTION_TYPE_INT,
           .default_value = "64",
diff --git a/xlators/mount/fuse/src/fuse-bridge.h b/xlators/mount/fuse/src/fuse-bridge.h
index 63ec5d2ef..3f45f0644 100644
--- a/xlators/mount/fuse/src/fuse-bridge.h
+++ b/xlators/mount/fuse/src/fuse-bridge.h
@@ -104,6 +104,7 @@ struct fuse_private {
         gf_boolean_t         read_only;
 	gf_boolean_t	     fopen_keep_cache;
 	int32_t		     gid_cache_timeout;
+        gf_boolean_t         enable_ino32;
         fdtable_t           *fdtable;
 	gid_cache_t	     gid_cache;
 
@@ -413,7 +414,8 @@ fuse_loc_fill (loc_t *loc, fuse_state_t *state, ino_t ino,
 call_frame_t *get_call_frame_for_req (fuse_state_t *state);
 fuse_state_t *get_fuse_state (xlator_t *this, fuse_in_header_t *finh);
 void free_fuse_state (fuse_state_t *state);
-void gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa);
+void gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa,
+                        gf_boolean_t enable_ino32);
 uint64_t inode_to_fuse_nodeid (inode_t *inode);
 xlator_t *fuse_active_subvol (xlator_t *fuse);
 inode_t *fuse_ino_to_inode (uint64_t ino, xlator_t *fuse);
diff --git a/xlators/mount/fuse/src/fuse-helpers.c b/xlators/mount/fuse/src/fuse-helpers.c
index d97cb1615..b990cffe4 100644
--- a/xlators/mount/fuse/src/fuse-helpers.c
+++ b/xlators/mount/fuse/src/fuse-helpers.c
@@ -430,33 +430,39 @@ fail:
         return ret;
 }
 
+/* Use the same logic as the Linux NFS-client */
+#define GF_FUSE_SQUASH_INO(ino) ((uint32_t) ino) ^ (ino >> 32)
 
 /* courtesy of folly */
 void
-gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa)
+gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa, gf_boolean_t enable_ino32)
 {
-        fa->ino        = st->ia_ino;
-        fa->size       = st->ia_size;
-        fa->blocks     = st->ia_blocks;
-        fa->atime      = st->ia_atime;
-        fa->mtime      = st->ia_mtime;
-        fa->ctime      = st->ia_ctime;
-        fa->atimensec  = st->ia_atime_nsec;
-        fa->mtimensec  = st->ia_mtime_nsec;
-        fa->ctimensec  = st->ia_ctime_nsec;
-        fa->mode       = st_mode_from_ia (st->ia_prot, st->ia_type);
-        fa->nlink      = st->ia_nlink;
-        fa->uid        = st->ia_uid;
-        fa->gid        = st->ia_gid;
-        fa->rdev       = makedev (ia_major (st->ia_rdev),
-                                  ia_minor (st->ia_rdev));
+        if (enable_ino32)
+                fa->ino = GF_FUSE_SQUASH_INO(st->ia_ino);
+        else
+                fa->ino = st->ia_ino;
+
+        fa->size        = st->ia_size;
+        fa->blocks      = st->ia_blocks;
+        fa->atime       = st->ia_atime;
+        fa->mtime       = st->ia_mtime;
+        fa->ctime       = st->ia_ctime;
+        fa->atimensec   = st->ia_atime_nsec;
+        fa->mtimensec   = st->ia_mtime_nsec;
+        fa->ctimensec   = st->ia_ctime_nsec;
+        fa->mode        = st_mode_from_ia (st->ia_prot, st->ia_type);
+        fa->nlink       = st->ia_nlink;
+        fa->uid         = st->ia_uid;
+        fa->gid         = st->ia_gid;
+        fa->rdev        = makedev (ia_major (st->ia_rdev),
+                                   ia_minor (st->ia_rdev));
 #if FUSE_KERNEL_MINOR_VERSION >= 9
-        fa->blksize    = st->ia_blksize;
+        fa->blksize     = st->ia_blksize;
 #endif
 #ifdef GF_DARWIN_HOST_OS
-        fa->crtime     = (uint64_t)-1;
-        fa->crtimensec = (uint32_t)-1;
-        fa->flags      = 0;
+        fa->crtime      = (uint64_t)-1;
+        fa->crtimensec  = (uint32_t)-1;
+        fa->flags       = 0;
 #endif
 }