tweak debug/info output, implement dbfs_unlink with slightly improved error macros handling
#include "dbfs.h"
#include "../lib/log.h"
void _dbfs_readlink_res (const struct evsql_result_info *res, void *arg) {
struct fuse_req *req = arg;
int err = 0;
uint32_t ino;
const char *type, *link;
// check the results
if ((err = _dbfs_check_res(res, 1, 3)))
SERROR(err = (err == 1 ? ENOENT : EIO));
// get our data
if (0
|| evsql_result_uint32(res, 0, 0, &ino, 0 ) // inodes.ino
|| evsql_result_string(res, 0, 1, &type, 0 ) // inodes.type
|| evsql_result_string(res, 0, 2, &link, 1 ) // inodes.link_path
)
EERROR(err = EIO, "invalid db data");
// 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);
int err;
INFO("[dbfs.readlink %p] ino=%lu", req, ino);
const char *sql =
"SELECT"
" inodes.ino, inodes.type, inodes.link_path"
" FROM inodes"
" WHERE inodes.ino = $1::int4";
static struct evsql_query_params params = EVSQL_PARAMS(EVSQL_FMT_BINARY) {
EVSQL_PARAM ( UINT32 ),
EVSQL_PARAMS_END
};
// build params
if (0
|| evsql_param_uint32(¶ms, 0, ino)
)
SERROR(err = EIO);
// query
if (evsql_query_params(ctx->db, NULL, sql, ¶ms, _dbfs_readlink_res, req) == NULL)
SERROR(err = EIO);
// XXX: handle interrupts
// wait
return;
error:
if ((err = fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}
#define SETERR(err_var, err_val, bool_val) ((err_var) = bool_val ? (err_val) : 0)
void dbfs_unlink_res (const struct evsql_result_info *res, void *arg) {
struct fuse_req *req = arg;
int err = 0;
// check the results
if ((err = dbfs_check_result(res, 1, 0)))
goto error;
INFO("\t[dbfs.unlink %p] -> OK", req);
// reply
if ((err = fuse_reply_err(req, 0)))
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_unlink (struct fuse_req *req, fuse_ino_t parent, const char *name) {
struct dbfs *ctx = fuse_req_userdata(req);
int err;
INFO("[dbfs.unlink %p] parent=%lu, name=%s", req, parent, name);
const char *sql =
"DELETE"
" FROM file_tree"
" WHERE parent = $1::int4 AND name = $2::varchar";
static struct evsql_query_params params = EVSQL_PARAMS(EVSQL_FMT_BINARY) {
EVSQL_PARAM ( UINT32 ),
EVSQL_PARAM ( STRING ),
EVSQL_PARAMS_END
};
// build params
if (SETERR(err, (0
|| evsql_param_uint32(¶ms, 0, parent)
|| evsql_param_string(¶ms, 1, name)
), EIO))
goto error;
// query
if (SETERR(err, evsql_query_params(ctx->db, NULL, sql, ¶ms, dbfs_unlink_res, req) == NULL, EIO))
goto error;
// XXX: handle interrupts
// wait
return;
error:
if ((err = fuse_reply_err(req, err)))
EWARNING(err, "fuse_reply_err");
}