--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/dbfs/attr.c	Fri Oct 17 02:04:03 2008 +0300
@@ -0,0 +1,175 @@
+
+#include "dbfs.h"
+#include "../lib/log.h"
+#include "../lib/misc.h"
+
+// max. size for a setattr UPDATE query
+#define DBFS_SETATTR_SQL_MAX 512
+
+// for building the setattr UPDATE
+#define FIELD(to_set, flag, field, value) ((to_set) & (flag)) ? (field " = " value ", ") : ""
+
+void _dbfs_attr_res (const struct evsql_result_info *res, void *arg) {
+    struct fuse_req *req = arg;
+    struct stat st; ZINIT(st);
+    int err = 0;
+    
+    uint32_t ino;
+
+    // check the results
+    if ((err = _dbfs_check_res(res, 1, 5)))
+        SERROR(err = (err ==  1 ? ENOENT : EIO));
+        
+    // get our data
+    if (0
+        ||  evsql_result_uint32(res, 0, 0, &ino,        0 ) // inodes.ino
+    )
+        EERROR(err = EIO, "invalid db data");
+ 
+        
+    INFO("[dbfs.getattr %p] -> ino=%lu, stat follows", req, (unsigned long int) ino);
+    
+    // stat attrs
+    if ((err = _dbfs_stat_info(&st, res, 0, 1)))
+        goto error;
+
+    // XXX: we don't have the ino
+    st.st_ino = ino;
+
+    // reply
+    if ((err = fuse_reply_attr(req, &st, st.st_nlink ? CACHE_TIMEOUT : 0)))
+        EERROR(err, "fuse_reply_entry");
+
+error:
+    if (err && (err = fuse_reply_err(req, err)))
+        EWARNING(err, "fuse_reply_err");
+
+    // free
+    evsql_result_free(res);
+}
+
+void dbfs_getattr (struct fuse_req *req, fuse_ino_t ino, struct fuse_file_info *fi) {
+    struct dbfs *ctx = fuse_req_userdata(req);
+    int err;
+    
+    (void) fi;
+
+    INFO("[dbfs.getattr %p] ino=%lu", req, ino);
+
+    const char *sql =
+        "SELECT"
+        " inodes.ino, " DBFS_STAT_COLS
+        " FROM inodes"
+        " WHERE inodes.ino = $1::int4"
+        " GROUP BY inodes.ino, inodes.type, inodes.mode, data";
+
+    static struct evsql_query_params params = EVSQL_PARAMS(EVSQL_FMT_BINARY) {
+        EVSQL_PARAM ( UINT32 ),
+
+        EVSQL_PARAMS_END
+    };
+
+    // build params
+    if (0
+        ||  evsql_param_uint32(&params, 0, ino)
+    )
+        SERROR(err = EIO);
+        
+    // query
+    if (evsql_query_params(ctx->db, NULL, sql, &params, _dbfs_attr_res, req) == NULL)
+        SERROR(err = EIO);
+
+    // XXX: handle interrupts
+    
+    // wait
+    return;
+
+error:
+    if ((err = fuse_reply_err(req, err)))
+        EWARNING(err, "fuse_reply_err");
+}
+
+
+void dbfs_setattr (struct fuse_req *req, fuse_ino_t ino, struct stat *attr, int to_set, struct fuse_file_info *fi) {
+    struct dbfs *ctx = fuse_req_userdata(req);
+    int err;
+    int ret;
+    
+    char sql_buf[DBFS_SETATTR_SQL_MAX];
+    
+    static struct evsql_query_params params = EVSQL_PARAMS(EVSQL_FMT_BINARY) {
+        EVSQL_PARAM ( UINT16 ), // inodes.mode
+        EVSQL_PARAM ( UINT32 ), // inodes.uid
+        EVSQL_PARAM ( UINT32 ), // inodes.gid
+        EVSQL_PARAM ( UINT32 ), // data size
+        EVSQL_PARAM ( UINT32 ), // ino
+
+        EVSQL_PARAMS_END
+    };
+
+    // log
+    INFO("[dbfs.setattr %p] ino=%lu, fileop=%p: ", req, ino, fi && fi->fh ? (void*) fi->fh : NULL);
+    
+    if (to_set & FUSE_SET_ATTR_MODE) {
+        // ignore the S_IFMT
+        attr->st_mode &= 07777;
+
+        INFO("\tmode    = %08o", attr->st_mode);
+    }
+
+    if (to_set & FUSE_SET_ATTR_UID)
+        INFO("\tuid     = %u", attr->st_uid);
+
+    if (to_set & FUSE_SET_ATTR_GID)
+        INFO("\tgid     = %u", attr->st_gid);
+
+    if (to_set & FUSE_SET_ATTR_SIZE)
+        INFO("\tsize    = %lu", attr->st_size);
+
+    if (to_set & FUSE_SET_ATTR_ATIME)
+        INFO("\tatime   = %lu", attr->st_atime);
+
+    if (to_set & FUSE_SET_ATTR_MTIME)
+        INFO("\tmtime   = %lu", attr->st_mtime);
+
+    // the SQL
+    if ((ret = snprintf(sql_buf, DBFS_SETATTR_SQL_MAX,
+        "UPDATE inodes SET"
+        " %s%s%s%s ino = ino"
+        " WHERE inodes.ino = $5::int4"
+        " RETURNING inodes.ino, " DBFS_STAT_COLS_NOAGGREGATE,
+        
+        FIELD(to_set, FUSE_SET_ATTR_MODE,   "mode", "$1::int2"),
+        FIELD(to_set, FUSE_SET_ATTR_UID,    "uid",  "$2::int4"),
+        FIELD(to_set, FUSE_SET_ATTR_GID,    "gid",  "$3::int4"),
+        FIELD(to_set, FUSE_SET_ATTR_SIZE,   "data", "lo_otruncate(data, $4::int4)")
+    )) >= DBFS_SETATTR_SQL_MAX && (err = EIO))
+        ERROR("sql_buf is too small: %i", ret);
+    
+    // the params...
+    if (0
+        || (                                  evsql_params_clear(&params)                    )
+        || ((to_set & FUSE_SET_ATTR_MODE ) && evsql_param_uint16(&params, 0, attr->st_mode)  )
+        || ((to_set & FUSE_SET_ATTR_UID  ) && evsql_param_uint32(&params, 1, attr->st_uid)   )
+        || ((to_set & FUSE_SET_ATTR_GID  ) && evsql_param_uint32(&params, 2, attr->st_gid)   )
+        || ((to_set & FUSE_SET_ATTR_SIZE ) && evsql_param_uint32(&params, 3, attr->st_size)  )
+        || (                                  evsql_param_uint32(&params, 4, ino)            )
+    )
+        SERROR(err = EIO);
+
+    // trace the query
+    evsql_query_debug(sql_buf, &params);
+    
+    // query... we can pretend it's a getattr :)
+    if (evsql_query_params(ctx->db, NULL, sql_buf, &params, _dbfs_attr_res, req) == NULL)
+        SERROR(err = EIO);
+
+    // XXX: handle interrupts
+    
+    // wait
+    return;
+
+error:
+    if ((err = fuse_reply_err(req, err)))
+        EWARNING(err, "fuse_reply_err");
+}