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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include "client.h"
#include "fd.h"
int
client_fd_lk_list_empty (fd_lk_ctx_t *lk_ctx, gf_boolean_t try_lock)
{
int ret = 1;
if (!lk_ctx) {
ret = -1;
goto out;
}
if (try_lock) {
ret = TRY_LOCK (&lk_ctx->lock);
if (ret != 0) {
ret = -1;
goto out;
}
} else {
LOCK (&lk_ctx->lock);
}
ret = list_empty (&lk_ctx->lk_list);
UNLOCK (&lk_ctx->lock);
out:
return ret;
}
clnt_fd_ctx_t *
this_fd_del_ctx (fd_t *file, xlator_t *this)
{
int dict_ret = -1;
uint64_t ctxaddr = 0;
GF_VALIDATE_OR_GOTO ("client", this, out);
GF_VALIDATE_OR_GOTO (this->name, file, out);
dict_ret = fd_ctx_del (file, this, &ctxaddr);
if (dict_ret < 0) {
ctxaddr = 0;
}
out:
return (clnt_fd_ctx_t *)(unsigned long)ctxaddr;
}
clnt_fd_ctx_t *
this_fd_get_ctx (fd_t *file, xlator_t *this)
{
int dict_ret = -1;
uint64_t ctxaddr = 0;
GF_VALIDATE_OR_GOTO ("client", this, out);
GF_VALIDATE_OR_GOTO (this->name, file, out);
dict_ret = fd_ctx_get (file, this, &ctxaddr);
if (dict_ret < 0) {
ctxaddr = 0;
}
out:
return (clnt_fd_ctx_t *)(unsigned long)ctxaddr;
}
void
this_fd_set_ctx (fd_t *file, xlator_t *this, loc_t *loc, clnt_fd_ctx_t *ctx)
{
uint64_t oldaddr = 0;
int32_t ret = -1;
GF_VALIDATE_OR_GOTO ("client", this, out);
GF_VALIDATE_OR_GOTO (this->name, file, out);
ret = fd_ctx_get (file, this, &oldaddr);
if (ret >= 0) {
if (loc)
gf_log (this->name, GF_LOG_INFO,
"%s (%s): trying duplicate remote fd set. ",
loc->path, uuid_utoa (loc->inode->gfid));
else
gf_log (this->name, GF_LOG_INFO,
"%p: trying duplicate remote fd set. ", file);
}
ret = fd_ctx_set (file, this, (uint64_t)(unsigned long)ctx);
if (ret < 0) {
if (loc)
gf_log (this->name, GF_LOG_WARNING,
"%s (%s): failed to set remote fd",
loc->path, uuid_utoa (loc->inode->gfid));
else
gf_log (this->name, GF_LOG_WARNING,
"%p: failed to set remote fd", file);
}
out:
return;
}
int
client_local_wipe (clnt_local_t *local)
{
if (local) {
loc_wipe (&local->loc);
loc_wipe (&local->loc2);
if (local->fd) {
fd_unref (local->fd);
}
if (local->iobref) {
iobref_unref (local->iobref);
}
GF_FREE (local->name);
mem_put (local);
}
return 0;
}
int
unserialize_rsp_dirent (xlator_t *this, struct gfs3_readdir_rsp *rsp,
gf_dirent_t *entries)
{
struct gfs3_dirlist *trav = NULL;
gf_dirent_t *entry = NULL;
int entry_len = 0;
int ret = -1;
clnt_conf_t *conf = NULL;
conf = this->private;
trav = rsp->reply;
while (trav) {
entry_len = gf_dirent_size (trav->name);
entry = GF_CALLOC (1, entry_len, gf_common_mt_gf_dirent_t);
if (!entry)
goto out;
entry->d_ino = trav->d_ino;
gf_itransform (this, trav->d_off, &entry->d_off,
conf->client_id);
entry->d_len = trav->d_len;
entry->d_type = trav->d_type;
strcpy (entry->d_name, trav->name);
list_add_tail (&entry->list, &entries->list);
trav = trav->nextentry;
}
ret = 0;
out:
return ret;
}
int
unserialize_rsp_direntp (xlator_t *this, fd_t *fd,
struct gfs3_readdirp_rsp *rsp, gf_dirent_t *entries)
{
struct gfs3_dirplist *trav = NULL;
char *buf = NULL;
gf_dirent_t *entry = NULL;
inode_table_t *itable = NULL;
int entry_len = 0;
int ret = -1;
clnt_conf_t *conf = NULL;
trav = rsp->reply;
if (fd)
itable = fd->inode->table;
conf = this->private;
if (!conf)
goto out;
while (trav) {
entry_len = gf_dirent_size (trav->name);
entry = GF_CALLOC (1, entry_len, gf_common_mt_gf_dirent_t);
if (!entry)
goto out;
entry->d_ino = trav->d_ino;
gf_itransform (this, trav->d_off, &entry->d_off,
conf->client_id);
entry->d_len = trav->d_len;
entry->d_type = trav->d_type;
gf_stat_to_iatt (&trav->stat, &entry->d_stat);
strcpy (entry->d_name, trav->name);
if (trav->dict.dict_val) {
/* Dictionary is sent along with response */
buf = memdup (trav->dict.dict_val, trav->dict.dict_len);
if (!buf)
goto out;
entry->dict = dict_new ();
ret = dict_unserialize (buf, trav->dict.dict_len,
&entry->dict);
if (ret < 0) {
gf_log (THIS->name, GF_LOG_WARNING,
"failed to unserialize xattr dict");
errno = EINVAL;
goto out;
}
entry->dict->extra_free = buf;
buf = NULL;
}
entry->inode = inode_find (itable, entry->d_stat.ia_gfid);
if (!entry->inode)
entry->inode = inode_new (itable);
list_add_tail (&entry->list, &entries->list);
trav = trav->nextentry;
}
ret = 0;
out:
return ret;
}
int
clnt_readdirp_rsp_cleanup (gfs3_readdirp_rsp *rsp)
{
gfs3_dirplist *prev = NULL;
gfs3_dirplist *trav = NULL;
trav = rsp->reply;
prev = trav;
while (trav) {
trav = trav->nextentry;
/* on client, the rpc lib allocates this */
free (prev->dict.dict_val);
free (prev->name);
free (prev);
prev = trav;
}
return 0;
}
int
clnt_readdir_rsp_cleanup (gfs3_readdir_rsp *rsp)
{
gfs3_dirlist *prev = NULL;
gfs3_dirlist *trav = NULL;
trav = rsp->reply;
prev = trav;
while (trav) {
trav = trav->nextentry;
/* on client, the rpc lib allocates this */
free (prev->name);
free (prev);
prev = trav;
}
return 0;
}
int
client_get_remote_fd (xlator_t *this, fd_t *fd, int flags, int64_t *remote_fd)
{
clnt_fd_ctx_t *fdctx = NULL;
clnt_conf_t *conf = NULL;
GF_VALIDATE_OR_GOTO (this->name, fd, out);
GF_VALIDATE_OR_GOTO (this->name, remote_fd, out);
conf = this->private;
pthread_mutex_lock (&conf->lock);
{
fdctx = this_fd_get_ctx (fd, this);
if (!fdctx)
*remote_fd = GF_ANON_FD_NO;
else if (__is_fd_reopen_in_progress (fdctx))
*remote_fd = -1;
else
*remote_fd = fdctx->remote_fd;
}
pthread_mutex_unlock (&conf->lock);
if ((flags & FALLBACK_TO_ANON_FD) && (*remote_fd == -1))
*remote_fd = GF_ANON_FD_NO;
return 0;
out:
return -1;
}
gf_boolean_t
client_is_reopen_needed (fd_t *fd, xlator_t *this, int64_t remote_fd)
{
clnt_fd_ctx_t *fdctx = NULL;
fdctx = this_fd_get_ctx (fd, this);
if (fdctx && (fdctx->remote_fd == -1) &&
(remote_fd == GF_ANON_FD_NO))
return _gf_true;
return _gf_false;
}
int
client_fd_fop_prepare_local (call_frame_t *frame, fd_t *fd, int64_t remote_fd)
{
xlator_t *this = NULL;
clnt_conf_t *conf = NULL;
clnt_local_t *local = NULL;
int ret = 0;
this = frame->this;
conf = this->private;
if (!frame || !fd) {
ret = -EINVAL;
goto out;
}
frame->local = mem_get0 (this->local_pool);
if (frame->local == NULL) {
ret = -ENOMEM;
goto out;
}
local = frame->local;
local->fd = fd_ref (fd);
local->attempt_reopen = client_is_reopen_needed (fd, this, remote_fd);
return 0;
out:
return ret;
}
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