int _9p_walk(struct _9p_request_data *req9p, void *worker_data,
u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
unsigned int i = 0;
u16 *msgtag = NULL;
u32 *fid = NULL;
u32 *newfid = NULL;
u16 *nwname = NULL;
u16 *wnames_len;
char *wnames_str;
uint64_t fileid;
cache_inode_status_t cache_status;
cache_entry_t *pentry = NULL;
char name[MAXNAMLEN];
u16 *nwqid;
struct _9p_fid *pfid = NULL;
struct _9p_fid *pnewfid = NULL;
/* Now Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getptr(cursor, newfid, u32);
_9p_getptr(cursor, nwname, u16);
LogDebug(COMPONENT_9P, "TWALK: tag=%u fid=%u newfid=%u nwname=%u",
(u32) *msgtag, *fid, *newfid, *nwname);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, worker_data, msgtag, ERANGE, plenout,
preply);
if (*newfid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, worker_data, msgtag, ERANGE, plenout,
preply);
pfid = req9p->pconn->fids[*fid];
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, worker_data, msgtag, EIO, plenout,
preply);
}
op_ctx = &pfid->op_context;
pnewfid = gsh_calloc(1, sizeof(struct _9p_fid));
if (pnewfid == NULL)
return _9p_rerror(req9p, worker_data, msgtag, ERANGE, plenout,
preply);
/* Is this a lookup or a fid cloning operation ? */
if (*nwname == 0) {
/* Cloning operation */
memcpy((char *)pnewfid, (char *)pfid, sizeof(struct _9p_fid));
/* Set the new fid id */
pnewfid->fid = *newfid;
/* This is not a TATTACH fid */
pnewfid->from_attach = false;
/* Increments refcount */
(void) cache_inode_lru_ref(pnewfid->pentry, LRU_REQ_STALE_OK);
} else {
/* the walk is in fact a lookup */
pentry = pfid->pentry;
for (i = 0; i < *nwname; i++) {
_9p_getstr(cursor, wnames_len, wnames_str);
snprintf(name, MAXNAMLEN, "%.*s", *wnames_len,
wnames_str);
LogDebug(COMPONENT_9P,
"TWALK (lookup): tag=%u fid=%u newfid=%u (component %u/%u :%s)",
(u32) *msgtag, *fid, *newfid, i + 1, *nwname,
name);
if (pnewfid->pentry == pentry)
pnewfid->pentry = NULL;
/* refcount +1 */
cache_status =
cache_inode_lookup(pentry, name, &pnewfid->pentry);
if (pnewfid->pentry == NULL) {
gsh_free(pnewfid);
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status),
plenout, preply);
}
if (pentry != pfid->pentry)
cache_inode_put(pentry);
pentry = pnewfid->pentry;
}
pnewfid->fid = *newfid;
pnewfid->op_context = pfid->op_context;
pnewfid->ppentry = pfid->pentry;
strncpy(pnewfid->name, name, MAXNAMLEN-1);
/* gdata ref is not hold : the pfid, which use same gdata */
/* will be clunked after pnewfid */
/* This clunk release the gdata */
pnewfid->gdata = pfid->gdata;
/* This is not a TATTACH fid */
pnewfid->from_attach = false;
cache_status = cache_inode_fileid(pnewfid->pentry, &fileid);
if (cache_status != CACHE_INODE_SUCCESS) {
gsh_free(pnewfid);
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status),
plenout, preply);
}
/* Build the qid */
/* No cache, we want the client to stay synchronous
* with the server */
pnewfid->qid.version = 0;
pnewfid->qid.path = fileid;
pnewfid->specdata.xattr.xattr_id = 0;
pnewfid->specdata.xattr.xattr_content = NULL;
switch (pnewfid->pentry->type) {
case REGULAR_FILE:
case CHARACTER_FILE:
case BLOCK_FILE:
case SOCKET_FILE:
case FIFO_FILE:
pnewfid->qid.type = _9P_QTFILE;
break;
case SYMBOLIC_LINK:
pnewfid->qid.type = _9P_QTSYMLINK;
break;
case DIRECTORY:
pnewfid->qid.type = _9P_QTDIR;
break;
default:
LogMajor(COMPONENT_9P,
"implementation error, you should not see this message !!!!!!");
gsh_free(pnewfid);
return _9p_rerror(req9p, worker_data, msgtag, EINVAL,
plenout, preply);
break;
}
}
/* keep info on new fid */
req9p->pconn->fids[*newfid] = pnewfid;
/* As much qid as requested fid */
nwqid = nwname;
/* Hold refcount on gdata */
uid2grp_hold_group_data(pnewfid->gdata);
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RWALK);
_9p_setptr(cursor, msgtag, u16);
_9p_setptr(cursor, nwqid, u16);
for (i = 0; i < *nwqid; i++) {
/** @todo: should be different qids
* for each directory walked through */
_9p_setqid(cursor, pnewfid->qid);
}
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P,
"RWALK: tag=%u fid=%u newfid=%u nwqid=%u fileid=%llu pentry=%p refcount=%i",
(u32) *msgtag, *fid, *newfid, *nwqid,
(unsigned long long)pnewfid->qid.path, pnewfid->pentry,
pnewfid->pentry->lru.refcnt);
return 1;
}
int _9p_symlink(struct _9p_request_data *req9p, void *worker_data,
u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
u16 *msgtag = NULL;
u32 *fid = NULL;
u16 *name_len = NULL;
char *name_str = NULL;
u16 *linkcontent_len = NULL;
char *linkcontent_str = NULL;
u32 *gid = NULL;
struct _9p_fid *pfid = NULL;
struct _9p_qid qid_symlink;
cache_entry_t *pentry_symlink = NULL;
char symlink_name[MAXNAMLEN];
uint64_t fileid;
cache_inode_status_t cache_status;
uint32_t mode = 0777;
cache_inode_create_arg_t create_arg;
memset(&create_arg, 0, sizeof(create_arg));
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getstr(cursor, name_len, name_str);
_9p_getstr(cursor, linkcontent_len, linkcontent_str);
_9p_getptr(cursor, gid, u32);
LogDebug(COMPONENT_9P,
"TSYMLINK: tag=%u fid=%u name=%.*s linkcontent=%.*s gid=%u",
(u32) *msgtag, *fid, *name_len, name_str, *linkcontent_len,
linkcontent_str, *gid);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, worker_data, msgtag, ERANGE, plenout,
preply);
pfid = req9p->pconn->fids[*fid];
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, worker_data, msgtag, EIO, plenout,
preply);
}
if ((pfid->op_context.export_perms->options &
EXPORT_OPTION_WRITE_ACCESS) == 0)
return _9p_rerror(req9p, worker_data, msgtag, EROFS, plenout,
preply);
op_ctx = &pfid->op_context;
snprintf(symlink_name, MAXNAMLEN, "%.*s", *name_len, name_str);
create_arg.link_content = gsh_malloc(MAXPATHLEN);
if (create_arg.link_content == NULL)
return _9p_rerror(req9p, worker_data, msgtag, EFAULT, plenout,
preply);
snprintf(create_arg.link_content, MAXPATHLEN, "%.*s", *linkcontent_len,
linkcontent_str);
/* Let's do the job */
/* BUGAZOMEU: @todo : the gid parameter is not used yet,
* flags is not yet used */
cache_status =
cache_inode_create(pfid->pentry, symlink_name, SYMBOLIC_LINK, mode,
&create_arg, &pentry_symlink);
if (create_arg.link_content != NULL)
gsh_free(create_arg.link_content);
if (pentry_symlink == NULL) {
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status), plenout,
preply);
}
/* This is not a TATTACH fid */
pfid->from_attach = false;
cache_status = cache_inode_fileid(pentry_symlink, &fileid);
/* put the entry:
* we don't want to remember it even if cache_inode_fileid fails. */
cache_inode_put(pentry_symlink);
if (cache_status != CACHE_INODE_SUCCESS) {
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status), plenout,
preply);
}
/* Build the qid */
qid_symlink.type = _9P_QTSYMLINK;
qid_symlink.version = 0;
qid_symlink.path = fileid;
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RSYMLINK);
_9p_setptr(cursor, msgtag, u16);
_9p_setqid(cursor, qid_symlink);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P,
"RSYMLINK: tag=%u fid=%u name=%.*s qid=(type=%u,version=%u,path=%llu)",
(u32) *msgtag, *fid, *name_len, name_str, qid_symlink.type,
qid_symlink.version, (unsigned long long)qid_symlink.path);
return 1;
}
int _9p_mkdir(struct _9p_request_data *req9p, void *worker_data,
u32 *plenout, char *preply)
{
char *cursor = req9p->_9pmsg + _9P_HDR_SIZE + _9P_TYPE_SIZE;
u16 *msgtag = NULL;
u32 *fid = NULL;
u32 *mode = NULL;
u32 *gid = NULL;
u16 *name_len = NULL;
char *name_str = NULL;
struct _9p_fid *pfid = NULL;
struct _9p_qid qid_newdir;
cache_entry_t *pentry_newdir = NULL;
char dir_name[MAXNAMLEN];
uint64_t fileid;
cache_inode_status_t cache_status;
/* Get data */
_9p_getptr(cursor, msgtag, u16);
_9p_getptr(cursor, fid, u32);
_9p_getstr(cursor, name_len, name_str);
_9p_getptr(cursor, mode, u32);
_9p_getptr(cursor, gid, u32);
LogDebug(COMPONENT_9P,
"TMKDIR: tag=%u fid=%u name=%.*s mode=0%o gid=%u",
(u32) *msgtag, *fid, *name_len, name_str, *mode, *gid);
if (*fid >= _9P_FID_PER_CONN)
return _9p_rerror(req9p, worker_data, msgtag, ERANGE, plenout,
preply);
pfid = req9p->pconn->fids[*fid];
/* Check that it is a valid fid */
if (pfid == NULL || pfid->pentry == NULL) {
LogDebug(COMPONENT_9P, "request on invalid fid=%u", *fid);
return _9p_rerror(req9p, worker_data, msgtag, EIO, plenout,
preply);
}
snprintf(dir_name, MAXNAMLEN, "%.*s", *name_len, name_str);
op_ctx = &pfid->op_context;
/* Create the directory */
/* BUGAZOMEU: @todo : the gid parameter is not used yet */
cache_status =
cache_inode_create(pfid->pentry, dir_name, DIRECTORY, *mode, NULL,
&pentry_newdir);
if (pentry_newdir == NULL)
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status), plenout,
preply);
/* This is not a TATTACH fid */
pfid->from_attach = FALSE;
cache_status = cache_inode_fileid(pentry_newdir, &fileid);
/* put the entry:
* we don't want to remember it even if cache_inode_fileid fails. */
cache_inode_put(pentry_newdir);
if (cache_status != CACHE_INODE_SUCCESS)
return _9p_rerror(req9p, worker_data, msgtag,
_9p_tools_errno(cache_status), plenout,
preply);
/* Build the qid */
qid_newdir.type = _9P_QTDIR;
qid_newdir.version = 0;
qid_newdir.path = fileid;
/* Build the reply */
_9p_setinitptr(cursor, preply, _9P_RMKDIR);
_9p_setptr(cursor, msgtag, u16);
_9p_setqid(cursor, qid_newdir);
_9p_setendptr(cursor, preply);
_9p_checkbound(cursor, preply, plenout);
LogDebug(COMPONENT_9P,
"RMKDIR: tag=%u fid=%u name=%.*s qid=(type=%u,version=%u,path=%llu)",
(u32) *msgtag, *fid, *name_len, name_str, qid_newdir.type,
qid_newdir.version, (unsigned long long)qid_newdir.path);
return 1;
}