core: add 'fremovexattr()' fop

so operations can be done on fd for extended attribute removal

Change-Id: Ie026f1b53793aeb4ae33e96ea5408c7a97f34bf6
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 766571
Reviewed-on: http://review.gluster.com/778
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

3 files changed, 211 insertions, 0 deletions

diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c
index 8e823bec4e8..5f11987034d 100644
--- a/xlators/protocol/client/src/client.c
+++ b/xlators/protocol/client/src/client.c
@@ -1421,6 +1421,38 @@ out:
 	return 0;
 }
 
+int32_t
+client_fremovexattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
+                     const char *name)
+{
+        int          ret  = -1;
+        clnt_conf_t *conf = NULL;
+        rpc_clnt_procedure_t *proc = NULL;
+        clnt_args_t  args = {0,};
+
+        conf = this->private;
+        if (!conf || !conf->fops)
+                goto out;
+
+        args.name = name;
+        args.fd  = fd;
+
+        proc = &conf->fops->proctable[GF_FOP_FREMOVEXATTR];
+        if (!proc) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "rpc procedure not found for %s",
+                        gf_fop_list[GF_FOP_FREMOVEXATTR]);
+                goto out;
+        }
+        if (proc->fn)
+                ret = proc->fn (frame, this, &args);
+out:
+        if (ret)
+                STACK_UNWIND_STRICT (fremovexattr, frame, -1, ENOTCONN);
+
+	return 0;
+}
+
 
 int32_t
 client_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd,
@@ -2303,6 +2335,7 @@ struct xlator_fops fops = {
         .fsetxattr   = client_fsetxattr,
         .fgetxattr   = client_fgetxattr,
         .removexattr = client_removexattr,
+        .fremovexattr = client_fremovexattr,
         .opendir     = client_opendir,
         .readdir     = client_readdir,
         .readdirp    = client_readdirp,
diff --git a/xlators/protocol/client/src/client3_1-fops.c b/xlators/protocol/client/src/client3_1-fops.c
index d34ffc20031..0a89127b9a7 100644
--- a/xlators/protocol/client/src/client3_1-fops.c
+++ b/xlators/protocol/client/src/client3_1-fops.c
@@ -1040,6 +1040,44 @@ out:
 }
 
 int
+client3_1_fremovexattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
+                            void *myframe)
+{
+        call_frame_t    *frame      = NULL;
+        gf_common_rsp    rsp        = {0,};
+        int              ret        = 0;
+        xlator_t         *this       = NULL;
+
+        this = THIS;
+
+        frame = myframe;
+
+        if (-1 == req->rpc_status) {
+                rsp.op_ret   = -1;
+                rsp.op_errno = ENOTCONN;
+                goto out;
+        }
+
+        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gf_common_rsp);
+        if (ret < 0) {
+                gf_log (this->name, GF_LOG_ERROR, "XDR decoding failed");
+                rsp.op_ret   = -1;
+                rsp.op_errno = EINVAL;
+                goto out;
+        }
+
+out:
+        if (rsp.op_ret == -1) {
+                gf_log (this->name, GF_LOG_WARNING, "remote operation failed: %s",
+                        strerror (gf_error_to_errno (rsp.op_errno)));
+        }
+        STACK_UNWIND_STRICT (fremovexattr, frame, rsp.op_ret,
+                             gf_error_to_errno (rsp.op_errno));
+
+        return 0;
+}
+
+int
 client3_1_fsyncdir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
 {
@@ -4582,6 +4620,50 @@ unwind:
         return 0;
 }
 
+int32_t
+client3_1_fremovexattr (call_frame_t *frame, xlator_t *this,
+                        void *data)
+{
+        clnt_conf_t           *conf     = NULL;
+        clnt_args_t           *args     = NULL;
+        gfs3_fremovexattr_req  req      = {{0,},};
+        int                    ret      = 0;
+        int64_t                remote_fd = -1;
+        int                    op_errno = ESTALE;
+
+        if (!frame || !this || !data)
+                goto unwind;
+
+        args = data;
+
+        if (!(args->fd && args->fd->inode))
+                goto unwind;
+
+        CLIENT_GET_REMOTE_FD(conf, args->fd, remote_fd, unwind);
+
+        memcpy (req.gfid,  args->fd->inode->gfid, 16);
+        req.name = (char *)args->name;
+        req.fd = remote_fd;
+
+        conf = this->private;
+
+        ret = client_submit_request (this, &req, frame, conf->fops,
+                                     GFS3_OP_FREMOVEXATTR,
+                                     client3_1_fremovexattr_cbk, NULL,
+                                     NULL, 0, NULL, 0, NULL,
+                                     (xdrproc_t)xdr_gfs3_fremovexattr_req);
+        if (ret) {
+                op_errno = ENOTCONN;
+                goto unwind;
+        }
+
+        return 0;
+unwind:
+        gf_log (this->name, GF_LOG_WARNING, "failed to send the fop: %s", strerror (op_errno));
+        STACK_UNWIND_STRICT (fremovexattr, frame, -1, op_errno);
+        return 0;
+}
+
 
 int32_t
 client3_1_lk (call_frame_t *frame, xlator_t *this,
@@ -5308,6 +5390,7 @@ rpc_clnt_procedure_t clnt3_1_fop_actors[GF_FOP_MAXVALUE] = {
         [GF_FOP_RELEASE]     = { "RELEASE",     client3_1_release },
         [GF_FOP_RELEASEDIR]  = { "RELEASEDIR",  client3_1_releasedir },
         [GF_FOP_GETSPEC]     = { "GETSPEC",     client3_getspec },
+        [GF_FOP_FREMOVEXATTR] = { "FREMOVEXATTR", client3_1_fremovexattr },
 };
 
 /* Used From RPC-CLNT library to log proper name of procedure based on number */
@@ -5355,6 +5438,7 @@ char *clnt3_1_fop_names[GFS3_OP_MAXVALUE] = {
         [GFS3_OP_READDIRP]    = "READDIRP",
         [GFS3_OP_RELEASE]     = "RELEASE",
         [GFS3_OP_RELEASEDIR]  = "RELEASEDIR",
+        [GFS3_OP_FREMOVEXATTR] = "FREMOVEXATTR",
 };
 
 rpc_clnt_prog_t clnt3_1_fop_prog = {
diff --git a/xlators/protocol/server/src/server3_1-fops.c b/xlators/protocol/server/src/server3_1-fops.c
index 482c242d5ce..79aede07461 100644
--- a/xlators/protocol/server/src/server3_1-fops.c
+++ b/xlators/protocol/server/src/server3_1-fops.c
@@ -692,6 +692,33 @@ server_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 }
 
 int
+server_fremovexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                         int32_t op_ret, int32_t op_errno)
+{
+        gf_common_rsp     rsp = {0,};
+        rpcsvc_request_t *req = NULL;
+        server_state_t      *state = NULL;
+
+        req   = frame->local;
+        state = CALL_STATE(frame);
+
+        rsp.op_ret    = op_ret;
+        rsp.op_errno  = gf_errno_to_error (op_errno);
+        if (op_ret == -1)
+                gf_log (this->name, GF_LOG_INFO,
+                        "%"PRId64": FREMOVEXATTR (%s) ==> %"PRId32" (%s)",
+                        frame->root->unique, ((state->fd->inode) ?
+                                              uuid_utoa (state->fd->inode->gfid) :
+                                              "--"),
+                        op_ret, strerror (op_errno));
+
+        server_submit_reply (frame, req, &rsp, NULL, 0, NULL,
+                             (xdrproc_t)xdr_gf_common_rsp);
+
+        return 0;
+}
+
+int
 server_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int32_t op_ret, int32_t op_errno, dict_t *dict)
 {
@@ -2211,6 +2238,26 @@ err:
 }
 
 int
+server_fremovexattr_resume (call_frame_t *frame, xlator_t *bound_xl)
+{
+        server_state_t *state = NULL;
+
+        state = CALL_STATE (frame);
+
+        if (state->resolve.op_ret != 0)
+                goto err;
+
+        STACK_WIND (frame, server_fremovexattr_cbk,
+                    bound_xl, bound_xl->fops->fremovexattr,
+                    state->fd, state->name);
+        return 0;
+err:
+        server_fremovexattr_cbk (frame, NULL, frame->this, state->resolve.op_ret,
+                                 state->resolve.op_errno);
+        return 0;
+}
+
+int
 server_fgetxattr_resume (call_frame_t *frame, xlator_t *bound_xl)
 {
         server_state_t *state = NULL;
@@ -3932,6 +3979,52 @@ out:
         return ret;
 }
 
+int
+server_fremovexattr (rpcsvc_request_t *req)
+{
+        server_state_t       *state                 = NULL;
+        call_frame_t         *frame                 = NULL;
+        gfs3_fremovexattr_req  args                  = {{0,},};
+        int                   ret                   = -1;
+
+        if (!req)
+                return ret;
+
+        args.name = alloca (4096);
+
+        if (!xdr_to_generic (req->msg[0], &args,
+                             (xdrproc_t)xdr_gfs3_fremovexattr_req)) {
+                //failed to decode msg;
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        frame = get_frame_from_request (req);
+        if (!frame) {
+                // something wrong, mostly insufficient memory
+                req->rpc_err = GARBAGE_ARGS; /* TODO */
+                goto out;
+        }
+        frame->root->op = GF_FOP_FREMOVEXATTR;
+
+        state = CALL_STATE (frame);
+        if (!state->conn->bound_xl) {
+                /* auth failure, request on subvolume without setvolume */
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        state->resolve.type   = RESOLVE_MUST;
+        state->resolve.fd_no  = args.fd;
+        memcpy (state->resolve.gfid, args.gfid, 16);
+        state->name           = gf_strdup (args.name);
+
+        ret = 0;
+        resolve_and_resume (frame, server_fremovexattr_resume);
+out:
+        return ret;
+}
+
 
 
 
@@ -5223,6 +5316,7 @@ rpcsvc_actor_t glusterfs3_1_fop_actors[] = {
         [GFS3_OP_READDIRP]    = { "READDIRP",   GFS3_OP_READDIRP, server_readdirp, NULL, NULL, 0},
         [GFS3_OP_RELEASE]     = { "RELEASE",    GFS3_OP_RELEASE, server_release, NULL, NULL, 0},
         [GFS3_OP_RELEASEDIR]  = { "RELEASEDIR", GFS3_OP_RELEASEDIR, server_releasedir, NULL, NULL, 0},
+        [GFS3_OP_FREMOVEXATTR] = { "FREMOVEXATTR", GFS3_OP_FREMOVEXATTR, server_fremovexattr, NULL, NULL, 0},
 };