core: get xattrs also as part of readdirp

readdirp_req() call sends a dict_t * as an argument, which
contains all the xattr keys for which the entries got in
readdirp_rsp() are having xattr value filled dictionary.

Change-Id: I8b7e1290740ea3e884e67d19156ce849227167c0
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 765785
Reviewed-on: http://review.gluster.com/771
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

9 files changed, 56 insertions, 35 deletions

diff --git a/libglusterfs/src/call-stub.c b/libglusterfs/src/call-stub.c
index 8761b40a0..8b28dc9be 100644
--- a/libglusterfs/src/call-stub.c
+++ b/libglusterfs/src/call-stub.c
@@ -1810,7 +1810,8 @@ fop_readdirp_stub (call_frame_t *frame,
                    fop_readdirp_t fn,
                    fd_t *fd,
                    size_t size,
-                   off_t off)
+                   off_t off,
+                   dict_t *dict)
 {
         call_stub_t *stub = NULL;
 
@@ -1821,6 +1822,7 @@ fop_readdirp_stub (call_frame_t *frame,
         stub->args.readdirp.fd = fd_ref (fd);
         stub->args.readdirp.size = size;
         stub->args.readdirp.off = off;
+        stub->args.readdirp.dict = dict;
 
 out:
         return stub;
@@ -2438,7 +2440,8 @@ call_resume_wind (call_stub_t *stub)
                                         stub->frame->this,
                                         stub->args.readdirp.fd,
                                         stub->args.readdirp.size,
-                                        stub->args.readdirp.off);
+                                        stub->args.readdirp.off,
+                                        stub->args.readdirp.dict);
                 break;
         }
 
diff --git a/libglusterfs/src/call-stub.h b/libglusterfs/src/call-stub.h
index 01b6cdd1b..4b03dbfe2 100644
--- a/libglusterfs/src/call-stub.h
+++ b/libglusterfs/src/call-stub.h
@@ -502,6 +502,7 @@ typedef struct {
 			fd_t *fd;
 			size_t size;
 			off_t off;
+                        dict_t *dict;
 		} readdirp;
 		struct {
 			fop_readdirp_cbk_t fn;
@@ -1022,10 +1023,11 @@ fop_readdir_stub (call_frame_t *frame,
 
 call_stub_t *
 fop_readdirp_stub (call_frame_t *frame,
-		   fop_readdir_t fn,
+		   fop_readdirp_t fn,
 		   fd_t *fd,
 		   size_t size,
-		   off_t off);
+		   off_t off,
+                   dict_t *dict);
 
 call_stub_t *
 fop_readdirp_cbk_stub (call_frame_t *frame,
diff --git a/libglusterfs/src/defaults.c b/libglusterfs/src/defaults.c
index 392819ca9..828f266b3 100644
--- a/libglusterfs/src/defaults.c
+++ b/libglusterfs/src/defaults.c
@@ -750,10 +750,10 @@ default_readdir_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 int32_t
 default_readdirp_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                         size_t size, off_t off)
+                         size_t size, off_t off, dict_t *dict)
 {
         STACK_WIND (frame, default_readdirp_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdirp, fd, size, off);
+                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, dict);
         return 0;
 }
 
@@ -1117,10 +1117,10 @@ default_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 int32_t
 default_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                  size_t size, off_t off)
+                  size_t size, off_t off, dict_t *dict)
 {
         STACK_WIND (frame, default_readdirp_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdirp, fd, size, off);
+                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, dict);
         return 0;
 }
 
diff --git a/libglusterfs/src/defaults.h b/libglusterfs/src/defaults.h
index a312901a7..fe04cbf92 100644
--- a/libglusterfs/src/defaults.h
+++ b/libglusterfs/src/defaults.h
@@ -206,7 +206,7 @@ int32_t default_readdir (call_frame_t *frame,
 int32_t default_readdirp (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          size_t size, off_t off);
+                          size_t size, off_t off, dict_t *dict);
 
 int32_t default_xattrop (call_frame_t *frame,
                          xlator_t *this,
@@ -418,9 +418,9 @@ int32_t default_readdir_resume (call_frame_t *frame,
                           size_t size, off_t off);
 
 int32_t default_readdirp_resume (call_frame_t *frame,
-                          xlator_t *this,
-                          fd_t *fd,
-                          size_t size, off_t off);
+                                 xlator_t *this,
+                                 fd_t *fd,
+                                 size_t size, off_t off, dict_t *dict);
 
 int32_t default_xattrop_resume (call_frame_t *frame,
                          xlator_t *this,
diff --git a/libglusterfs/src/gf-dirent.c b/libglusterfs/src/gf-dirent.c
index 4c85db3f3..8d15b0405 100644
--- a/libglusterfs/src/gf-dirent.c
+++ b/libglusterfs/src/gf-dirent.c
@@ -31,26 +31,6 @@
 #include "xlator.h"
 
 gf_dirent_t *
-gf_dirent_for_namelen (int len)
-{
-        gf_dirent_t *gf_dirent = NULL;
-
-        /* TODO: use mem-pool */
-        gf_dirent = CALLOC (len, sizeof(char));
-        if (!gf_dirent)
-                return NULL;
-
-        INIT_LIST_HEAD (&gf_dirent->list);
-
-        gf_dirent->d_off = 0;
-        gf_dirent->d_ino = -1;
-        gf_dirent->d_type = 0;
-
-        return gf_dirent;
-}
-
-
-gf_dirent_t *
 gf_dirent_for_name (const char *name)
 {
         gf_dirent_t *gf_dirent = NULL;
@@ -86,7 +66,36 @@ gf_dirent_free (gf_dirent_t *entries)
                 return;
 
         list_for_each_entry_safe (entry, tmp, &entries->list, list) {
+                if (entry->dict)
+                        dict_unref (entry->dict);
+                if (entry->inode)
+                        inode_unref (entry->inode);
+
                 list_del (&entry->list);
                 GF_FREE (entry);
         }
 }
+
+/* TODO: Currently, with this function, we will be breaking the
+   policy of 1-1 mapping of kernel nlookup refs with our inode_t's
+   nlookup count.
+   Need more thoughts before finalizing this function
+*/
+int
+gf_link_inodes_from_dirent (xlator_t *this, inode_t *parent,
+                            gf_dirent_t *entries)
+{
+        gf_dirent_t *entry      = NULL;
+        inode_t     *link_inode = NULL;
+
+        list_for_each_entry (entry, &entries->list, list) {
+                if (entry->inode) {
+                        link_inode = inode_link (entry->inode, parent,
+                                                 entry->d_name, &entry->d_stat);
+                        inode_lookup (link_inode);
+                        inode_unref (link_inode);
+                }
+        }
+
+        return 0;
+}
diff --git a/libglusterfs/src/gf-dirent.h b/libglusterfs/src/gf-dirent.h
index db1dac835..29b4aba80 100644
--- a/libglusterfs/src/gf-dirent.h
+++ b/libglusterfs/src/gf-dirent.h
@@ -27,6 +27,7 @@
 #endif
 
 #include "iatt.h"
+#include "inode.h"
 
 #define gf_dirent_size(name) (sizeof (gf_dirent_t) + strlen (name) + 1)
 
@@ -51,12 +52,15 @@ struct _gf_dirent_t {
 	uint32_t                             d_len;
 	uint32_t                             d_type;
         struct iatt                          d_stat;
+        dict_t                              *dict;
+        inode_t                             *inode;
 	char                                 d_name[0];
 };
 
 
 gf_dirent_t *gf_dirent_for_name (const char *name);
 void gf_dirent_free (gf_dirent_t *entries);
-gf_dirent_t * gf_dirent_for_namelen (int len);
+int gf_link_inodes_from_dirent (xlator_t *this, inode_t *parent,
+                                gf_dirent_t *entries);
 
 #endif /* _GF_DIRENT_H */
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c
index 99956bfb7..2771bdea5 100644
--- a/libglusterfs/src/syncop.c
+++ b/libglusterfs/src/syncop.c
@@ -394,12 +394,13 @@ syncop_readdirp (xlator_t *subvol,
                  fd_t *fd,
                  size_t size,
                  off_t off,
+                 dict_t *dict,
                  gf_dirent_t *entries)
 {
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_readdirp_cbk, subvol->fops->readdirp,
-                fd, size, off);
+                fd, size, off, dict);
 
         if (entries)
                 list_splice_init (&args.entries.list, &entries->list);
diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h
index 9d9c5a9cc..b4cdafd53 100644
--- a/libglusterfs/src/syncop.h
+++ b/libglusterfs/src/syncop.h
@@ -165,6 +165,7 @@ int syncop_lookup (xlator_t *subvol, loc_t *loc, dict_t *xattr_req,
                    struct iatt *iatt, dict_t **xattr_rsp, struct iatt *parent);
 
 int syncop_readdirp (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
+                     dict_t *dict,
                      /* out */
                      gf_dirent_t *entries);
 
diff --git a/libglusterfs/src/xlator.h b/libglusterfs/src/xlator.h
index c86e8718c..fab3b4468 100644
--- a/libglusterfs/src/xlator.h
+++ b/libglusterfs/src/xlator.h
@@ -606,7 +606,8 @@ typedef int32_t (*fop_readdirp_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    fd_t *fd,
                                    size_t size,
-                                   off_t offset);
+                                   off_t offset,
+                                   dict_t *dict);
 
 typedef int32_t (*fop_xattrop_t) (call_frame_t *frame,
                                   xlator_t *this,