diff options
author | Amar Tumballi <amar@gluster.com> | 2010-06-21 07:00:04 +0000 |
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committer | Anand V. Avati <avati@dev.gluster.com> | 2010-06-21 20:21:10 -0700 |
commit | fdd20492638fe98a62b5e6d5e82f18cf4799fd1a (patch) | |
tree | 98082d7bfdc66157f40666f2070d3a45b582327a /xlators/protocol/lib/src/protocol-common.c | |
parent | b9b8734a9496ccf5f8ed5527dc7714930a59948b (diff) |
rpc protocol
Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875
Diffstat (limited to 'xlators/protocol/lib/src/protocol-common.c')
-rw-r--r-- | xlators/protocol/lib/src/protocol-common.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/xlators/protocol/lib/src/protocol-common.c b/xlators/protocol/lib/src/protocol-common.c new file mode 100644 index 00000000000..4a9845e082d --- /dev/null +++ b/xlators/protocol/lib/src/protocol-common.c @@ -0,0 +1,109 @@ +/* + Copyright (c) 2007-2010 Gluster, Inc. <http://www.gluster.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + + +#include "globals.h" +#include "compat.h" +#include "protocol-common.h" +#include "glusterfs-xdr.h" + + +static int +gf_dirent_nb_size (gf_dirent_t *entries) +{ + return (sizeof (struct gf_dirent_nb) + strlen (entries->d_name) + 1); +} + +int +gf_dirent_serialize (gf_dirent_t *entries, char *buf, size_t buf_size) +{ + struct gf_dirent_nb *entry_nb = NULL; + gf_dirent_t *entry = NULL; + int size = 0; + int entry_size = 0; + + + list_for_each_entry (entry, &entries->list, list) { + entry_size = gf_dirent_nb_size (entry); + + if (buf && (size + entry_size <= buf_size)) { + entry_nb = (void *) (buf + size); + + entry_nb->d_ino = entry->d_ino; + entry_nb->d_off = entry->d_off; + entry_nb->d_len = entry->d_len; + entry_nb->d_type = entry->d_type; + + gf_stat_from_iatt (&entry_nb->d_stat, &entry->d_stat); + + strcpy (entry_nb->d_name, entry->d_name); + } + size += entry_size; + } + + return size; +} + + +int +gf_dirent_unserialize (gf_dirent_t *entries, const char *buf, size_t buf_size) +{ + struct gf_dirent_nb *entry_nb = NULL; + int remaining_size = 0; + int least_dirent_size = 0; + int count = 0; + gf_dirent_t *entry = NULL; + int entry_strlen = 0; + int entry_len = 0; + + + remaining_size = buf_size; + least_dirent_size = (sizeof (struct gf_dirent_nb) + 2); + + while (remaining_size >= least_dirent_size) { + entry_nb = (void *)(buf + (buf_size - remaining_size)); + + entry_strlen = strnlen (entry_nb->d_name, remaining_size); + if (entry_strlen == remaining_size) { + break; + } + + entry_len = sizeof (gf_dirent_t) + entry_strlen + 1; + entry = GF_CALLOC (1, entry_len, gf_common_mt_gf_dirent_t); + if (!entry) { + break; + } + + entry->d_ino = entry_nb->d_ino; + entry->d_off = entry_nb->d_off; + entry->d_len = entry_nb->d_len; + entry->d_type = entry_nb->d_type; + + gf_stat_to_iatt (&entry_nb->d_stat, &entry->d_stat); + + strcpy (entry->d_name, entry_nb->d_name); + + list_add_tail (&entry->list, &entries->list); + + remaining_size -= (sizeof (*entry_nb) + entry_strlen + 1); + count++; + } + + return count; +} |