X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=blob.c;h=373d8d005cc1ea9e232f47f76e0c3794cd018538;hp=5ab5c1ce48fafd5ad3cbf4b0189202ef34aaa996;hb=38657223b245405602bc50906a9687ce98f53857;hpb=8c5c975d5e8f209919283373793c2751a719699b diff --git a/blob.c b/blob.c index 5ab5c1ce..373d8d00 100644 --- a/blob.c +++ b/blob.c @@ -1,19 +1,47 @@ /* - * Copyright (C) 2007-2009 Andre Noll + * Copyright (C) 2007-2013 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ /** \file blob.c Macros and functions for blob handling. */ +#include #include +#include + #include "para.h" #include "error.h" +#include "crypt.h" #include "string.h" #include "afh.h" #include "afs.h" -#include "net.h" #include "ipc.h" +#include "portable_io.h" +#include "sideband.h" +#include "command.h" + +/** + * Compare two osl objects pointing to unsigned integers of 32 bit size. + * + * \param obj1 Pointer to the first integer. + * \param obj2 Pointer to the second integer. + * + * \return The values required for an osl compare function. + * + * \sa osl_compare_func, osl_hash_compare(). + */ +static int uint32_compare(const struct osl_object *obj1, const struct osl_object *obj2) +{ + uint32_t d1 = read_u32((const char *)obj1->data); + uint32_t d2 = read_u32((const char *)obj2->data); + + if (d1 < d2) + return 1; + if (d1 > d2) + return -1; + return 0; +} static struct osl_column_description blob_cols[] = { [BLOBCOL_ID] = { @@ -36,12 +64,31 @@ static struct osl_column_description blob_cols[] = { } }; -/** \cond doxygen isn't smart enough to recognize these */ +/** Define an osl table description for a blob table. */ +#define DEFINE_BLOB_TABLE_DESC(table_name) \ + struct osl_table_description table_name ## _table_desc = { \ + .name = #table_name, \ + .num_columns = NUM_BLOB_COLUMNS, \ + .flags = OSL_LARGE_TABLE, \ + .column_descriptions = blob_cols \ + }; + +/** Define a pointer to an osl blob table with a canonical name. */ +#define DEFINE_BLOB_TABLE_PTR(table_name) struct osl_table *table_name ## _table; + + +/** Define a blob table. */ +#define INIT_BLOB_TABLE(table_name) \ + DEFINE_BLOB_TABLE_DESC(table_name); \ + DEFINE_BLOB_TABLE_PTR(table_name); + +/* doxygen isn't smart enough to recognize these */ +/** \cond blob_table */ INIT_BLOB_TABLE(lyrics); INIT_BLOB_TABLE(images); INIT_BLOB_TABLE(moods); INIT_BLOB_TABLE(playlists); -/** \endcond */ +/** \endcond blob_table */ /** Flags that may be passed to the \p ls functions of each blob type. */ enum blob_ls_flags { @@ -71,7 +118,7 @@ static int print_blob(struct osl_table *table, struct osl_row *row, if (!(lbad->flags & BLOB_LS_FLAG_LONG)) return para_printf(&lbad->pb, "%s\n", name); - ret = osl_get_object(table, row, BLOBCOL_ID, &obj); + ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj)); if (ret < 0) { para_printf(&lbad->pb, "%s: %s\n", name, para_strerror(-ret)); return ret; @@ -86,9 +133,12 @@ static void com_lsblob_callback(struct osl_table *table, struct lsblob_action_data lbad = { .flags = *(uint32_t *)query->data, .pb = { - .max_size = SHMMAX, - .private_data = &fd, - .max_size_handler = pass_buffer_as_shm + .max_size = shm_get_shmmax(), + .private_data = &(struct afs_max_size_handler_data) { + .fd = fd, + .band = SBD_OUTPUT + }, + .max_size_handler = afs_max_size_handler, } }; struct pattern_match_data pmd = { @@ -111,19 +161,21 @@ static void com_lsblob_callback(struct osl_table *table, ret = for_each_matching_row(&pmd); if (ret < 0) para_printf(&lbad.pb, "%s\n", para_strerror(-ret)); + else if (pmd.num_matches == 0 && pmd.patterns.size > 0) + para_printf(&lbad.pb, "no matches\n"); if (lbad.pb.offset) - pass_buffer_as_shm(lbad.pb.buf, lbad.pb.offset, &fd); + pass_buffer_as_shm(fd, SBD_OUTPUT, lbad.pb.buf, lbad.pb.offset); free(lbad.pb.buf); } -static int com_lsblob(callback_function *f, int fd, int argc, char * const * const argv) +static int com_lsblob(callback_function *f, struct command_context *cc) { uint32_t flags = 0; struct osl_object options = {.data = &flags, .size = sizeof(flags)}; int i; - for (i = 1; i < argc; i++) { - const char *arg = argv[i]; + for (i = 1; i < cc->argc; i++) { + const char *arg = cc->argv[i]; if (arg[0] != '-') break; if (!strcmp(arg, "--")) { @@ -146,22 +198,22 @@ static int com_lsblob(callback_function *f, int fd, int argc, char * const * con } // if (argc > i) // return -E_BLOB_SYNTAX; - return send_option_arg_callback_request(&options, argc - i, - argv + i, f, send_result, &fd); + return send_option_arg_callback_request(&options, cc->argc - i, + cc->argv + i, f, afs_cb_result_handler, cc); } static int cat_blob(struct osl_table *table, struct osl_row *row, __a_unused const char *name, void *data) { - int ret = 0, ret2; + int ret = 0, ret2, fd = *(int *)data; struct osl_object obj; - ret = osl_open_disk_object(table, row, BLOBCOL_DEF, &obj); + ret = osl(osl_open_disk_object(table, row, BLOBCOL_DEF, &obj)); if (ret < 0) - return ret; - if (obj.size) - ret = pass_buffer_as_shm(obj.data, obj.size, data); - ret2 = osl_close_disk_object(&obj); + return (ret == osl(-E_OSL_EMPTY))? 0 : ret; + assert(obj.size > 0); + ret = pass_buffer_as_shm(fd, SBD_OUTPUT, obj.data, obj.size); + ret2 = osl(osl_close_disk_object(&obj)); return (ret < 0)? ret : ret2; } @@ -178,34 +230,35 @@ static void com_catblob_callback(struct osl_table *table, int fd, .action = cat_blob }; for_each_matching_row(&pmd); + if (pmd.num_matches == 0) { + char err_msg[] = "no matches\n"; + pass_buffer_as_shm(fd, SBD_OUTPUT, err_msg, sizeof(err_msg)); + } } -static int com_catblob(callback_function *f, int fd, int argc, - char * const * const argv) +static int com_catblob(callback_function *f, struct command_context *cc) { - if (argc < 2) + if (cc->argc < 2) return -E_BLOB_SYNTAX; - return send_standard_callback_request(argc - 1, argv + 1, f, send_result, &fd); + return send_standard_callback_request(cc->argc - 1, cc->argv + 1, f, + afs_cb_result_handler, cc); } /** Used for removing rows from a blob table. */ struct rmblob_data { /** Message buffer. */ struct para_buffer pb; - /** Number of removed blobs. */ - unsigned num_removed; }; static int remove_blob(struct osl_table *table, struct osl_row *row, const char *name, void *data) { struct rmblob_data *rmbd = data; - int ret = osl_del_row(table, row); + int ret = osl(osl_del_row(table, row)); if (ret < 0) { para_printf(&rmbd->pb, "%s: %s\n", name, para_strerror(-ret)); return ret; } - rmbd->num_removed++; return 1; } @@ -214,11 +267,13 @@ static void com_rmblob_callback(struct osl_table *table, int fd, { int ret, ret2 = 0; struct rmblob_data rmbd = { - .num_removed = 0, .pb = { - .max_size = SHMMAX, - .private_data = &fd, - .max_size_handler = pass_buffer_as_shm + .max_size = shm_get_shmmax(), + .private_data = &(struct afs_max_size_handler_data) { + .fd = fd, + .band = SBD_OUTPUT + }, + .max_size_handler = afs_max_size_handler, } }; struct pattern_match_data pmd = { @@ -236,38 +291,37 @@ static void com_rmblob_callback(struct osl_table *table, int fd, if (ret2 < 0) goto out; } - if (!rmbd.num_removed) + if (pmd.num_matches == 0) ret2 = para_printf(&rmbd.pb, "no matches, nothing removed\n"); else { - ret2 = para_printf(&rmbd.pb, "removed %d blobs\n", rmbd.num_removed); + ret2 = para_printf(&rmbd.pb, "removed %d blobs\n", pmd.num_matches); afs_event(BLOB_RENAME, NULL, table); } out: if (ret2 >= 0 && rmbd.pb.offset) - pass_buffer_as_shm(rmbd.pb.buf, rmbd.pb.offset, &fd); + pass_buffer_as_shm(fd, SBD_OUTPUT, rmbd.pb.buf, rmbd.pb.offset); free(rmbd.pb.buf); } -static int com_rmblob(callback_function *f, int fd, int argc, - char * const * const argv) +static int com_rmblob(callback_function *f, struct command_context *cc) { - if (argc < 2) + if (cc->argc < 2) return -E_MOOD_SYNTAX; - return send_option_arg_callback_request(NULL, argc - 1, argv + 1, f, - send_result, &fd); + return send_option_arg_callback_request(NULL, cc->argc - 1, cc->argv + 1, f, + afs_cb_result_handler, cc); } -static void com_addblob_callback(struct osl_table *table, __a_unused int fd, +static void com_addblob_callback(struct osl_table *table, int fd, const struct osl_object *query) { struct osl_object objs[NUM_BLOB_COLUMNS]; - char *name = query->data; - size_t name_len = strlen(name) + 1; + char *name = query->data, *msg; + size_t name_len = strlen(name) + 1, msg_len; uint32_t id; unsigned num_rows; int ret; - ret = osl_get_num_rows(table, &num_rows); + ret = osl(osl_get_num_rows(table, &num_rows)); if (ret < 0) goto out; if (!num_rows) { /* this is the first entry ever added */ @@ -279,34 +333,38 @@ static void com_addblob_callback(struct osl_table *table, __a_unused int fd, objs[BLOBCOL_NAME].size = 1; objs[BLOBCOL_DEF].data = ""; objs[BLOBCOL_DEF].size = 1; - ret = osl_add_row(table, objs); + ret = osl(osl_add_row(table, objs)); if (ret < 0) goto out; } else { /* check if name already exists */ struct osl_row *row; struct osl_object obj = {.data = name, .size = name_len}; - ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row); - if (ret < 0 && ret != -E_RB_KEY_NOT_FOUND) + ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row)); + if (ret < 0 && ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND)) goto out; if (ret >= 0) { /* we already have a blob with this name */ + ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj)); + if (ret < 0) + goto out; + id = *(uint32_t *)obj.data; obj.data = name + name_len; obj.size = query->size - name_len; - ret = osl_update_object(table, row, BLOBCOL_DEF, &obj); + ret = osl(osl_update_object(table, row, BLOBCOL_DEF, &obj)); goto out; } /* new blob, get id of the dummy row and increment it */ obj.data = ""; obj.size = 1; - ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row); + ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row)); if (ret < 0) goto out; - ret = osl_get_object(table, row, BLOBCOL_ID, &obj); + ret = osl(osl_get_object(table, row, BLOBCOL_ID, &obj)); if (ret < 0) goto out; id = *(uint32_t *)obj.data + 1; obj.data = &id; - ret = osl_update_object(table, row, BLOBCOL_ID, &obj); + ret = osl(osl_update_object(table, row, BLOBCOL_ID, &obj)); if (ret < 0) goto out; } @@ -317,27 +375,111 @@ static void com_addblob_callback(struct osl_table *table, __a_unused int fd, objs[BLOBCOL_NAME].size = name_len; objs[BLOBCOL_DEF].data = name + name_len; objs[BLOBCOL_DEF].size = query->size - name_len; - ret = osl_add_row(table, objs); + ret = osl(osl_add_row(table, objs)); if (ret < 0) goto out; afs_event(BLOB_ADD, NULL, table); out: if (ret < 0) - PARA_NOTICE_LOG("%s\n", para_strerror(-ret)); + msg_len = xasprintf(&msg, "could not add %s: %s\n", name, + para_strerror(-ret)); + else + msg_len = xasprintf(&msg, "added %s as id %u\n", name, id); + pass_buffer_as_shm(fd, SBD_OUTPUT, msg, msg_len); + free(msg); +} + +/* Write input from fd to dynamically allocated buffer, but maximal 10M. */ +static int fd2buf(struct stream_cipher_context *scc, struct osl_object *obj) +{ + size_t max_size = 10 * 1024 * 1024; + int ret; + struct iovec iov; + + obj->data = NULL; + obj->size = 0; +again: + do { + ret = recv_sb(scc, SBD_BLOB_DATA, max_size, &iov); + } while (ret == 0); + + if (ret < 0) { + free(obj->data); + obj->data = NULL; + obj->size = 0; + return ret; + } + if (iov.iov_len == 0) /* end of blob */ + return 1; + if (!obj->data) { + obj->data = iov.iov_base; + obj->size = iov.iov_len; + } else { + obj->data = para_realloc(obj->data, obj->size + iov.iov_len); + memcpy(obj->data + obj->size, iov.iov_base, iov.iov_len); + obj->size += iov.iov_len; + free(iov.iov_base); + max_size -= iov.iov_len; + } + goto again; + return 1; +} + +/* + * Read data from a file descriptor, and send it to the afs process. + * + * \param cc Contains the file descriptor to read data from. + * \param arg_obj Pointer to the arguments to \a f. + * \param f The callback function. + * \param result_handler See \ref send_callback_request. + * \param private_result_data See \ref send_callback_request. + * + * This function is used by the addblob commands that instruct para_server to + * store arbitrary data in a blob table. Input data is read and decrypted from + * the file descriptor given by \a cc. This data is concatenated with the + * buffer given by \a arg_obj, and the combined buffer is made available to the + * afs process via the callback method. See \ref send_callback_request for + * details. + * + * \return Negative on errors, the return value of the underlying call to + * send_callback_request() otherwise. + */ +static int stdin_command(struct command_context *cc, struct osl_object *arg_obj, + callback_function *f, callback_result_handler *result_handler, + void *private_result_data) +{ + struct osl_object query, stdin_obj; + int ret; + + ret = send_sb(&cc->scc, NULL, 0, SBD_AWAITING_DATA, false); + if (ret < 0) + return ret; + ret = fd2buf(&cc->scc, &stdin_obj); + if (ret < 0) + return ret; + query.size = arg_obj->size + stdin_obj.size; + query.data = para_malloc(query.size); + memcpy(query.data, arg_obj->data, arg_obj->size); + if (stdin_obj.size > 0) + memcpy((char *)query.data + arg_obj->size, stdin_obj.data, + stdin_obj.size); + free(stdin_obj.data); + ret = send_callback_request(f, &query, result_handler, private_result_data); + free(query.data); + return ret; } -static int com_addblob(callback_function *f, int fd, int argc, - char * const * const argv) +static int com_addblob(callback_function *f, struct command_context *cc) { struct osl_object arg_obj; - if (argc != 2) + if (cc->argc != 2) return -E_BLOB_SYNTAX; - if (!*argv[1]) /* empty name is reserved for the dummy row */ + if (!*cc->argv[1]) /* empty name is reserved for the dummy row */ return -E_BLOB_SYNTAX; - arg_obj.size = strlen(argv[1]) + 1; - arg_obj.data = (char *)argv[1]; - return stdin_command(fd, &arg_obj, f, 10 * 1024 * 1024, NULL, NULL); + arg_obj.size = strlen(cc->argv[1]) + 1; + arg_obj.data = (char *)cc->argv[1]; + return stdin_command(cc, &arg_obj, f, afs_cb_result_handler, cc); } /* FIXME: Print output to client, not to log file */ @@ -348,13 +490,13 @@ static void com_mvblob_callback(struct osl_table *table, __a_unused int fd, struct osl_object obj = {.data = src, .size = strlen(src) + 1}; char *dest = src + obj.size; struct osl_row *row; - int ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row); + int ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row)); if (ret < 0) goto out; obj.data = dest; obj.size = strlen(dest) + 1; - ret = osl_update_object(table, row, BLOBCOL_NAME, &obj); + ret = osl(osl_update_object(table, row, BLOBCOL_NAME, &obj)); if (ret < 0) goto out; afs_event(BLOB_RENAME, NULL, table); @@ -363,13 +505,12 @@ out: PARA_NOTICE_LOG("%s\n", para_strerror(-ret)); } -static int com_mvblob(callback_function *f, __a_unused int fd, - int argc, char * const * const argv) +static int com_mvblob(callback_function *f, struct command_context *cc) { - if (argc != 3) + if (cc->argc != 3) return -E_MOOD_SYNTAX; - return send_option_arg_callback_request(NULL, argc - 1, argv + 1, f, - NULL, NULL); + return send_option_arg_callback_request(NULL, cc->argc - 1, + cc->argv + 1, f, NULL, NULL); } #define DEFINE_BLOB_COMMAND(cmd_name, table_name, cmd_prefix) \ @@ -377,9 +518,9 @@ static int com_mvblob(callback_function *f, __a_unused int fd, { \ return com_ ## cmd_name ## blob_callback(table_name ## _table, fd, query); \ } \ - int com_ ## cmd_name ## cmd_prefix(int fd, int argc, char * const * const argv) \ + int com_ ## cmd_name ## cmd_prefix(struct command_context *cc) \ { \ - return com_ ## cmd_name ## blob(com_ ## cmd_name ## cmd_prefix ## _callback, fd, argc, argv); \ + return com_ ## cmd_name ## blob(com_ ## cmd_name ## cmd_prefix ## _callback, cc); \ } static int blob_get_name_by_id(struct osl_table *table, uint32_t id, @@ -392,10 +533,10 @@ static int blob_get_name_by_id(struct osl_table *table, uint32_t id, *name = NULL; if (!id) return 1; - ret = osl_get_row(table, BLOBCOL_ID, &obj, &row); + ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row)); if (ret < 0) return ret; - ret = osl_get_object(table, row, BLOBCOL_NAME, &obj); + ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj)); if (ret < 0) return ret; *name = (char *)obj.data; @@ -420,10 +561,10 @@ static int blob_get_def_by_name(struct osl_table *table, char *name, def->data = NULL; if (!*name) return 1; - ret = osl_get_row(table, BLOBCOL_NAME, &obj, &row); + ret = osl(osl_get_row(table, BLOBCOL_NAME, &obj, &row)); if (ret < 0) return ret; - return osl_open_disk_object(table, row, BLOBCOL_DEF, def); + return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def)); } /** Define the \p get_def_by_id function for this blob type. */ @@ -443,10 +584,10 @@ static int blob_get_def_by_id(struct osl_table *table, uint32_t id, def->data = NULL; if (!id) return 1; - ret = osl_get_row(table, BLOBCOL_ID, &obj, &row); + ret = osl(osl_get_row(table, BLOBCOL_ID, &obj, &row)); if (ret < 0) return ret; - return osl_open_disk_object(table, row, BLOBCOL_DEF, def); + return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def)); } /** Define the \p get_def_by_id function for this blob type. */ @@ -460,11 +601,11 @@ static int blob_get_name_and_def_by_row(struct osl_table *table, const struct osl_row *row, char **name, struct osl_object *def) { struct osl_object obj; - int ret = osl_get_object(table, row, BLOBCOL_NAME, &obj); + int ret = osl(osl_get_object(table, row, BLOBCOL_NAME, &obj)); if (ret < 0) return ret; *name = obj.data; - return osl_open_disk_object(table, row, BLOBCOL_DEF, def); + return osl(osl_open_disk_object(table, row, BLOBCOL_DEF, def)); } /** Define the \p get_name_and_def_by_row function for this blob type. */ #define DEFINE_GET_NAME_AND_DEF_BY_ROW(table_name, cmd_prefix) \ @@ -497,11 +638,11 @@ static int blob_open(struct osl_table **table, { int ret; desc->dir = dir; - ret = osl_open_table(desc, table); + ret = osl(osl_open_table(desc, table)); if (ret >= 0) return ret; *table = NULL; - if (ret >= 0 || is_errno(-ret, ENOENT)) + if (ret >= 0 || ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_NOENT)) return 1; return ret; } @@ -542,9 +683,10 @@ static int blob_open(struct osl_table **table, DEFINE_GET_DEF_BY_NAME(table_name, cmd_prefix); \ DEFINE_GET_NAME_AND_DEF_BY_ROW(table_name, cmd_prefix); \ -/** \cond doxygen isn't smart enough to recognize these */ +/* doxygen isn't smart enough to recognize these */ +/** \cond blob_function */ DEFINE_BLOB_FUNCTIONS(lyrics, lyr); DEFINE_BLOB_FUNCTIONS(images, img); DEFINE_BLOB_FUNCTIONS(moods, mood); DEFINE_BLOB_FUNCTIONS(playlists, pl); -/** \endcond */ +/** \endcond blob_function */