#include "dbfs.h"
/*
* Handling simple ino-related ops, like lookup, readlink, unlink and link
*/
#include "../lib/log.h"
#include "../lib/misc.h"
/*
* Used for lookup and link
*/
void dbfs_entry_res (struct evsql_result *res, void *arg) {
struct fuse_req *req = arg;
struct fuse_entry_param e; ZINIT(e);
err_t err = 0;
uint32_t ino;
struct dbfs_stat_values stat_values;
// result info
static struct evsql_result_info result_info = {
0, {
{ EVSQL_FMT_BINARY, EVSQL_TYPE_UINT32 }, // inodes.ino
DBFS_STAT_RESULT_INFO,
{ 0, 0 }
}
};
// begin
if ((err = evsql_result_begin(&result_info, res)))
EERROR(err, "query failed");
// get the one row of data
if ((err = evsql_result_next(res, &ino, DBFS_STAT_RESULT_VALUES(&stat_values))) <= 0)
EERROR(err = (err ? err : ENOENT), "evsql_result_next");
INFO("\t[dbfs.lookup] -> ino=%u", ino);
// stat attrs
if ((err = _dbfs_stat_info(&e.attr, &stat_values)))
goto error;
// other attrs
e.ino = e.attr.st_ino = ino;
e.attr_timeout = CACHE_TIMEOUT;
e.entry_timeout = CACHE_TIMEOUT;
// reply
if ((err = -fuse_reply_entry(req, &e)))
EERROR(err, "fuse_reply_entry");
error:
if (err && (err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
// done
evsql_result_end(res);
}
void dbfs_lookup (struct fuse_req *req, fuse_ino_t parent, const char *name) {
struct dbfs *ctx = fuse_req_userdata(req);
struct evsql_query *query;
int err;
INFO("[dbfs.lookup] parent=%lu name=%s", parent, name);
// query info
static struct evsql_query_info query_info = {
.sql = "SELECT"
" inodes.ino, " DBFS_STAT_COLS
" FROM file_tree INNER JOIN inodes ON (file_tree.ino = inodes.ino)"
" WHERE file_tree.parent = $1::int4 AND file_tree.name = $2::varchar",
.params = {
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE ( STRING ),
EVSQL_TYPE_END
}
};
// query
if ((query = evsql_query_exec(ctx->db, NULL, &query_info, dbfs_entry_res, req,
(uint32_t) parent,
(const char *) name
)) == NULL)
EERROR(err = EIO, "evsql_query_params");
// handle interrupts
fuse_req_interrupt_func(req, dbfs_interrupt_query, query);
// wait
return;
error:
if ((err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}
void dbfs_readlink_res (struct evsql_result *res, void *arg) {
struct fuse_req *req = arg;
int err = 0;
uint32_t ino;
const char *type, *link;
// result info
static struct evsql_result_info result_info = {
0, {
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE ( STRING ),
EVSQL_TYPE ( STRING ),
EVSQL_TYPE_END
}
};
// begin
if ((err = evsql_result_begin(&result_info, res)))
EERROR(err, "evsql_result_begin");
// get the row of data
if ((err = evsql_result_next(res,
&ino, &type, &link
)) <= 0)
SERROR(err = err || ENOENT);
// is it a symlink?
if (_dbfs_mode(type) != S_IFLNK)
EERROR(err = EINVAL, "wrong type: %s", type);
INFO("\t[dbfs.readlink %p] -> ino=%lu, type=%s, link=%s", req, (unsigned long int) ino, type, link);
// reply
if ((err = -fuse_reply_readlink(req, link)))
EERROR(err, "fuse_reply_readlink");
error:
if (err && (err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
// free
evsql_result_free(res);
}
void dbfs_readlink (struct fuse_req *req, fuse_ino_t ino) {
struct dbfs *ctx = fuse_req_userdata(req);
struct evsql_query *query;
int err;
INFO("[dbfs.readlink %p] ino=%lu", req, ino);
// query info
static struct evsql_query_info query_info = {
.sql = "SELECT"
" inodes.ino, inodes.type, inodes.link_path"
" FROM inodes"
" WHERE inodes.ino = $1::int4",
.params = {
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE_END
}
};
// query
if ((query = evsql_query_exec(ctx->db, NULL, &query_info, dbfs_readlink_res, req,
(uint32_t) ino
)) == NULL)
SERROR(err = EIO);
// handle interrupts
fuse_req_interrupt_func(req, dbfs_interrupt_query, query);
// wait
return;
error:
if ((err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}
void dbfs_unlink_res (struct evsql_result *res, void *arg) {
struct fuse_req *req = arg;
int err = 0;
// check
if ((err = evsql_result_check(res)))
ERROR("evsql_result_check: %s", evsql_result_error(res));
INFO("\t[dbfs.unlink %p] -> OK", req);
// reply
if ((err = -fuse_reply_err(req, 0)))
EERROR(err, "fuse_reply_err");
error:
if (err && (err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
// free
evsql_result_free(res);
}
void dbfs_unlink (struct fuse_req *req, fuse_ino_t parent, const char *name) {
struct dbfs *ctx = fuse_req_userdata(req);
struct evsql_query *query;
int err;
INFO("[dbfs.unlink %p] parent=%lu, name=%s", req, parent, name);
// query info
static struct evsql_query_info query_info = {
.sql = "DELETE"
" FROM file_tree"
" WHERE parent = $1::int4 AND name = $2::varchar",
.params = {
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE ( STRING ),
EVSQL_TYPE_END
}
};
// query
if ((query = evsql_query_exec(ctx->db, NULL, &query_info, dbfs_unlink_res, req,
(uint32_t) parent,
(const char *) name
)) == NULL)
SERROR(err = EIO);
// handle interrupts
fuse_req_interrupt_func(req, dbfs_interrupt_query, query);
// wait
return;
error:
if ((err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}
void dbfs_link (struct fuse_req *req, fuse_ino_t ino, fuse_ino_t newparent, const char *newname) {
struct dbfs *ctx = fuse_req_userdata(req);
struct evsql_query *query;
int err;
INFO("[dbfs.link %p] ino=%lu, newparent=%lu, newname=%s", req, ino, newparent, newname);
// query info
static struct evsql_query_info query_info = {
.sql = "SELECT ino, type, mode, size, nlink FROM dbfs_link($1::int4, $2::int4, $3::varchar)",
.params = {
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE ( UINT32 ),
EVSQL_TYPE ( STRING ),
EVSQL_TYPE_END
}
};
// query
if ((query = evsql_query_exec(ctx->db, NULL, &query_info, dbfs_entry_res, req,
(uint32_t) ino,
(uint32_t) newparent,
(const char *) newname
)) == NULL)
SERROR(err = EIO);
// handle interrupts
fuse_req_interrupt_func(req, dbfs_interrupt_query, query);
// wait
return;
error:
if ((err = -fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}