core: fill 'ia_ino' from 'ia_gfid' in 'storage/posix' to preserve same ino number

take the least significant 64bit from gfid and assign it to 'ia_ino',
hence for a given file (or directory), the 'ia_ino' number is always
same, and we need not worry about the 'itransform' in 'cluster/*'
translators.

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>

BUG: 3042 (inode number should be constant on storage)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=3042

1 files changed, 20 insertions, 4 deletions

diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c
index 1ef88df10..524b700f0 100644
--- a/xlators/storage/posix/src/posix.c
+++ b/xlators/storage/posix/src/posix.c
@@ -243,6 +243,21 @@ posix_fill_gfid_fd (xlator_t *this, int fd, struct iatt *iatt)
         return ret;
 }
 
+void
+posix_fill_ino_from_gfid (xlator_t *this, struct iatt *buf)
+{
+        uint64_t temp_ino = 0;
+        int j = 0;
+        int i = 0;
+
+        /* consider least significant 8 bytes of value out of gfid */
+        for (i = 15; i > (15 - 8); i--) {
+                temp_ino += buf->ia_gfid[i] << j;
+                j += 8;
+        }
+
+        buf->ia_ino = temp_ino;
+}
 
 int
 posix_lstat_with_gfid (xlator_t *this, const char *path, struct iatt *stbuf_p)
@@ -264,6 +279,8 @@ posix_lstat_with_gfid (xlator_t *this, const char *path, struct iatt *stbuf_p)
         if (ret)
                 gf_log_callingfn (this->name, GF_LOG_DEBUG, "failed to get gfid");
 
+        posix_fill_ino_from_gfid (this, &stbuf);
+
         if (stbuf_p)
                 *stbuf_p = stbuf;
 out:
@@ -291,6 +308,8 @@ posix_fstat_with_gfid (xlator_t *this, int fd, struct iatt *stbuf_p)
         if (ret)
                 gf_log_callingfn (this->name, GF_LOG_DEBUG, "failed to get gfid");
 
+        posix_fill_ino_from_gfid (this, &stbuf);
+
         if (stbuf_p)
                 *stbuf_p = stbuf;
 
@@ -4116,10 +4135,6 @@ posix_do_readdir (call_frame_t *frame, xlator_t *this,
                         break;
                 }
 
-                stbuf.ia_ino = entry->d_ino;
-
-                entry->d_ino = stbuf.ia_ino;
-
                 this_entry = gf_dirent_for_name (entry->d_name);
 
                 if (!this_entry) {
@@ -4142,6 +4157,7 @@ posix_do_readdir (call_frame_t *frame, xlator_t *this,
                         strcpy (entry_path + real_path_len + 1,
                                 tmp_entry->d_name);
                         posix_lstat_with_gfid (this, entry_path, &stbuf);
+                        tmp_entry->d_ino = stbuf.ia_ino;
                         tmp_entry->d_stat = stbuf;
                 }
         }