core: add an extra flag to readv()/writev() API

needed to implement a proper handling of open flag alterations
using fcntl() on fd.

Change-Id: Ic280d5db6f1dc0418d5c439abb8db1d3ac21ced0
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 782265
Reviewed-on: http://review.gluster.com/2723
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

4 files changed, 17 insertions, 12 deletions

diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
index ef78892eb04..749abe5380d 100644
--- a/xlators/cluster/dht/src/dht-common.h
+++ b/xlators/cluster/dht/src/dht-common.h
@@ -466,7 +466,7 @@ int32_t dht_readv (call_frame_t *frame,
                    xlator_t *this,
                    fd_t     *fd,
                    size_t    size,
-                   off_t     offset);
+                   off_t     offset, uint32_t flags);
 
 int32_t dht_writev (call_frame_t      *frame,
                     xlator_t      *this,
@@ -474,6 +474,7 @@ int32_t dht_writev (call_frame_t      *frame,
                     struct iovec  *vector,
                     int32_t        count,
                     off_t          offset,
+                    uint32_t       flags,
                     struct iobref *iobref);
 
 int32_t dht_flush (call_frame_t *frame,
diff --git a/xlators/cluster/dht/src/dht-inode-read.c b/xlators/cluster/dht/src/dht-inode-read.c
index 7352e47bd62..3ec6f4ba243 100644
--- a/xlators/cluster/dht/src/dht-inode-read.c
+++ b/xlators/cluster/dht/src/dht-inode-read.c
@@ -448,7 +448,8 @@ dht_readv2 (xlator_t *this, call_frame_t *frame, int op_ret)
         subvol = local->cached_subvol;
 
         STACK_WIND (frame, dht_readv_cbk, subvol, subvol->fops->readv,
-                    local->fd, local->rebalance.size, local->rebalance.offset);
+                    local->fd, local->rebalance.size, local->rebalance.offset,
+                    local->rebalance.flags);
 
         return 0;
 
@@ -459,7 +460,7 @@ out:
 
 int
 dht_readv (call_frame_t *frame, xlator_t *this,
-           fd_t *fd, size_t size, off_t off)
+           fd_t *fd, size_t size, off_t off, uint32_t flags)
 {
         xlator_t     *subvol = NULL;
         int           op_errno = -1;
@@ -485,11 +486,12 @@ dht_readv (call_frame_t *frame, xlator_t *this,
 
         local->rebalance.offset = off;
         local->rebalance.size   = size;
+        local->rebalance.flags  = flags;
         local->call_cnt = 1;
 
         STACK_WIND (frame, dht_readv_cbk,
                     subvol, subvol->fops->readv,
-                    fd, size, off);
+                    fd, size, off, flags);
 
         return 0;
 
diff --git a/xlators/cluster/dht/src/dht-inode-write.c b/xlators/cluster/dht/src/dht-inode-write.c
index 4f65b46713c..2f59e7c94f6 100644
--- a/xlators/cluster/dht/src/dht-inode-write.c
+++ b/xlators/cluster/dht/src/dht-inode-write.c
@@ -112,14 +112,15 @@ dht_writev2 (xlator_t *this, call_frame_t *frame, int op_ret)
         STACK_WIND (frame, dht_writev_cbk,
                     subvol, subvol->fops->writev,
                     local->fd, local->rebalance.vector, local->rebalance.count,
-                    local->rebalance.offset, local->rebalance.iobref);
+                    local->rebalance.offset, local->rebalance.flags,
+                    local->rebalance.iobref);
 
         return 0;
 }
 
 int
-dht_writev (call_frame_t *frame, xlator_t *this,
-            fd_t *fd, struct iovec *vector, int count, off_t off,
+dht_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
+            struct iovec *vector, int count, off_t off, uint32_t flags,
             struct iobref *iobref)
 {
         xlator_t     *subvol = NULL;
@@ -149,12 +150,13 @@ dht_writev (call_frame_t *frame, xlator_t *this,
         local->rebalance.vector = iov_dup (vector, count);
         local->rebalance.offset = off;
         local->rebalance.count = count;
+        local->rebalance.flags = flags;
         local->rebalance.iobref = iobref_ref (iobref);
         local->call_cnt = 1;
 
         STACK_WIND (frame, dht_writev_cbk,
                     subvol, subvol->fops->writev,
-                    fd, vector, count, off, iobref);
+                    fd, vector, count, off, flags, iobref);
 
         return 0;
 
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index 6c91baaaccb..dfd6f3b6ecc 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -60,7 +60,7 @@ dht_write_with_holes (xlator_t *to, fd_t *fd, struct iovec *vec, int count,
                                 ret = syncop_write (to, fd, (buf + tmp_offset),
                                                     (start_idx - tmp_offset),
                                                     (offset + tmp_offset),
-                                                    iobref);
+                                                    iobref, 0);
                                 /* 'path' will be logged in calling function */
                                 if (ret < 0) {
                                         gf_log (THIS->name, GF_LOG_WARNING,
@@ -78,7 +78,7 @@ dht_write_with_holes (xlator_t *to, fd_t *fd, struct iovec *vec, int count,
                         /* This means, last chunk is not yet written.. write it */
                         ret = syncop_write (to, fd, (buf + tmp_offset),
                                             (buf_len - tmp_offset),
-                                            (offset + tmp_offset), iobref);
+                                            (offset + tmp_offset), iobref, 0);
                         if (ret < 0) {
                                 /* 'path' will be logged in calling function */
                                 gf_log (THIS->name, GF_LOG_WARNING,
@@ -263,7 +263,7 @@ __dht_rebalance_migrate_data (xlator_t *from, xlator_t *to, fd_t *src, fd_t *dst
                 read_size = (((ia_size - total) > DHT_REBALANCE_BLKSIZE) ?
                              DHT_REBALANCE_BLKSIZE : (ia_size - total));
                 ret = syncop_readv (from, src, read_size,
-                                    offset, &vector, &count, &iobref);
+                                    offset, 0, &vector, &count, &iobref);
                 if (!ret || (ret < 0)) {
                         break;
                 }
@@ -273,7 +273,7 @@ __dht_rebalance_migrate_data (xlator_t *from, xlator_t *to, fd_t *src, fd_t *dst
                                                     ret, offset, iobref);
                 else
                         ret = syncop_writev (to, dst, vector, count,
-                                             offset, iobref);
+                                             offset, iobref, 0);
                 if (ret < 0) {
                         break;
                 }