diff options
Diffstat (limited to 'source4/client/cifsdd.c')
| -rw-r--r-- | source4/client/cifsdd.c | 599 |
1 files changed, 599 insertions, 0 deletions
diff --git a/source4/client/cifsdd.c b/source4/client/cifsdd.c new file mode 100644 index 0000000000..cf3ab17308 --- /dev/null +++ b/source4/client/cifsdd.c @@ -0,0 +1,599 @@ +/* + CIFSDD - dd for SMB. + Main program, argument handling and block copying. + + Copyright (C) James Peach 2005-2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "system/filesys.h" +#include "auth/gensec/gensec.h" +#include "lib/cmdline/popt_common.h" + +#include "cifsdd.h" + +const char * const PROGNAME = "cifsdd"; + +#define SYNTAX_EXIT_CODE 1 /* Invokation syntax or logic error. */ +#define EOM_EXIT_CODE 9 /* Out of memory error. */ +#define FILESYS_EXIT_CODE 10 /* File manipulation error. */ +#define IOERROR_EXIT_CODE 11 /* Error during IO phase. */ + +struct dd_stats_record dd_stats; + +static int dd_sigint; +static int dd_sigusr1; + +static void dd_handle_signal(int sig) +{ + switch (sig) + { + case SIGINT: + ++dd_sigint; + break; + case SIGUSR1: + ++dd_sigusr1; + break; + default: + break; + } +} + +/* ------------------------------------------------------------------------- */ +/* Argument handling. */ +/* ------------------------------------------------------------------------- */ + +static const char * argtype_str(enum argtype arg_type) +{ + static const struct { + enum argtype arg_type; + const char * arg_name; + } names [] = + { + { ARG_NUMERIC, "COUNT" }, + { ARG_SIZE, "SIZE" }, + { ARG_PATHNAME, "FILE" }, + { ARG_BOOL, "BOOLEAN" }, + }; + + int i; + + for (i = 0; i < ARRAY_SIZE(names); ++i) { + if (arg_type == names[i].arg_type) { + return(names[i].arg_name); + } + } + + return("<unknown>"); +} + +static struct argdef args[] = +{ + { "bs", ARG_SIZE, "force ibs and obs to SIZE bytes" }, + { "ibs", ARG_SIZE, "read SIZE bytes at a time" }, + { "obs", ARG_SIZE, "write SIZE bytes at a time" }, + + { "count", ARG_NUMERIC, "copy COUNT input blocks" }, + { "seek",ARG_NUMERIC, "skip COUNT blocks at start of output" }, + { "skip",ARG_NUMERIC, "skip COUNT blocks at start of input" }, + + { "if", ARG_PATHNAME, "read input from FILE" }, + { "of", ARG_PATHNAME, "write output to FILE" }, + + { "direct", ARG_BOOL, "use direct I/O if non-zero" }, + { "sync", ARG_BOOL, "use synchronous writes if non-zero" }, + { "oplock", ARG_BOOL, "take oplocks on the input and output files" }, + +/* FIXME: We should support using iflags and oflags for setting oplock and I/O + * options. This would make us compatible with GNU dd. + */ +}; + +struct argdef * find_named_arg(const char * arg) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(args); ++i) { + if (strwicmp(arg, args[i].arg_name) == 0) { + return(&args[i]); + } + } + + return(NULL); +} + +int set_arg_argv(const char * argv) +{ + struct argdef * arg; + + char * name; + char * val; + + if ((name = strdup(argv)) == NULL) { + return(0); + } + + if ((val = strchr(name, '=')) == NULL) { + fprintf(stderr, "%s: malformed argument \"%s\"\n", + PROGNAME, argv); + goto fail; + } + + *val = '\0'; + val++; + + if ((arg = find_named_arg(name)) == NULL) { + fprintf(stderr, "%s: ignoring unknown argument \"%s\"\n", + PROGNAME, name); + goto fail; + } + + /* Found a matching name; convert the variable argument. */ + switch (arg->arg_type) { + case ARG_NUMERIC: + if (!conv_str_u64(val, &arg->arg_val.nval)) { + goto fail; + } + break; + case ARG_SIZE: + if (!conv_str_size(val, &arg->arg_val.nval)) { + goto fail; + } + break; + case ARG_BOOL: + if (!conv_str_bool(val, &arg->arg_val.bval)) { + goto fail; + } + break; + case ARG_PATHNAME: + if (!(arg->arg_val.pval = strdup(val))) { + goto fail; + } + break; + default: + fprintf(stderr, "%s: argument \"%s\" is of " + "unknown type\n", PROGNAME, name); + goto fail; + } + + free(name); + return(1); + +fail: + free(name); + return(0); +} + +void set_arg_val(const char * name, ...) +{ + va_list ap; + struct argdef * arg; + + va_start(ap, name); + if ((arg = find_named_arg(name)) == NULL) { + goto fail; + } + + /* Found a matching name; convert the variable argument. */ + switch (arg->arg_type) { + case ARG_NUMERIC: + case ARG_SIZE: + arg->arg_val.nval = va_arg(ap, uint64_t); + break; + case ARG_BOOL: + arg->arg_val.bval = va_arg(ap, BOOL); + break; + case ARG_PATHNAME: + arg->arg_val.pval = va_arg(ap, char *); + if (arg->arg_val.pval) { + arg->arg_val.pval = strdup(arg->arg_val.pval); + } + break; + default: + fprintf(stderr, "%s: argument \"%s\" is of " + "unknown type\n", PROGNAME, name); + goto fail; + } + + va_end(ap); + return; + +fail: + fprintf(stderr, "%s: ignoring unknown argument \"%s\"\n", + PROGNAME, name); + va_end(ap); + return; +} + +BOOL check_arg_bool(const char * name) +{ + struct argdef * arg; + + if ((arg = find_named_arg(name)) && + (arg->arg_type == ARG_BOOL)) { + return(arg->arg_val.bval); + } + + DEBUG(0, ("invalid argument name: %s", name)); + SMB_ASSERT(0); + return(False); +} + +uint64_t check_arg_numeric(const char * name) +{ + struct argdef * arg; + + if ((arg = find_named_arg(name)) && + (arg->arg_type == ARG_NUMERIC || arg->arg_type == ARG_SIZE)) { + return(arg->arg_val.nval); + } + + DEBUG(0, ("invalid argument name: %s", name)); + SMB_ASSERT(0); + return(-1); +} + +const char * check_arg_pathname(const char * name) +{ + struct argdef * arg; + + if ((arg = find_named_arg(name)) && + (arg->arg_type == ARG_PATHNAME)) { + return(arg->arg_val.pval); + } + + DEBUG(0, ("invalid argument name: %s", name)); + SMB_ASSERT(0); + return(NULL); +} + +static void dump_args(void) +{ + int i; + + DEBUG(10, ("dumping argument values:\n")); + for (i = 0; i < ARRAY_SIZE(args); ++i) { + switch (args[i].arg_type) { + case ARG_NUMERIC: + case ARG_SIZE: + DEBUG(10, ("\t%s=%llu\n", args[i].arg_name, + (unsigned long long)args[i].arg_val.nval)); + break; + case ARG_BOOL: + DEBUG(10, ("\t%s=%s\n", args[i].arg_name, + args[i].arg_val.bval ? "yes" : "no")); + break; + case ARG_PATHNAME: + DEBUG(10, ("\t%s=%s\n", args[i].arg_name, + args[i].arg_val.pval ? + args[i].arg_val.pval : + "(NULL)")); + break; + default: + SMB_ASSERT(0); + } + } +} + +static void cifsdd_help_message(poptContext pctx, + enum poptCallbackReason preason, + struct poptOption * poption, + const char * parg, + void * pdata) +{ + static const char const notes[] = +"FILE can be a local filename or a UNC path of the form //server/share/path.\n"; + + char prefix[24]; + int i; + + if (poption->shortName != '?') { + poptPrintUsage(pctx, stdout, 0); + fprintf(stdout, " [dd options]\n"); + exit(0); + } + + poptPrintHelp(pctx, stdout, 0); + fprintf(stdout, "\nCIFS dd options:\n"); + + for (i = 0; i < ARRAY_SIZE(args); ++i) { + if (args[i].arg_name == NULL) { + break; + } + + snprintf(prefix, sizeof(prefix), "%s=%-*s", + args[i].arg_name, + (int)(sizeof(prefix) - strlen(args[i].arg_name) - 2), + argtype_str(args[i].arg_type)); + prefix[sizeof(prefix) - 1] = '\0'; + fprintf(stdout, " %s%s\n", prefix, args[i].arg_help); + } + + fprintf(stdout, "\n%s\n", notes); + exit(0); +} + +/* ------------------------------------------------------------------------- */ +/* Main block copying routine. */ +/* ------------------------------------------------------------------------- */ + +static void print_transfer_stats(void) +{ + if (DEBUGLEVEL > 0) { + printf("%llu+%llu records in (%llu bytes)\n" + "%llu+%llu records out (%llu bytes)\n", + (unsigned long long)dd_stats.in.fblocks, + (unsigned long long)dd_stats.in.pblocks, + (unsigned long long)dd_stats.in.bytes, + (unsigned long long)dd_stats.out.fblocks, + (unsigned long long)dd_stats.out.pblocks, + (unsigned long long)dd_stats.out.bytes); + } else { + printf("%llu+%llu records in\n%llu+%llu records out\n", + (unsigned long long)dd_stats.in.fblocks, + (unsigned long long)dd_stats.in.pblocks, + (unsigned long long)dd_stats.out.fblocks, + (unsigned long long)dd_stats.out.pblocks); + } +} + +static struct dd_iohandle * open_file(const char * which) +{ + int options = 0; + const char * path = NULL; + struct dd_iohandle * handle = NULL; + + if (check_arg_bool("direct")) { + options |= DD_DIRECT_IO; + } + + if (check_arg_bool("sync")) { + options |= DD_SYNC_IO; + } + + if (check_arg_bool("oplock")) { + options |= DD_OPLOCK; + } + + if (strcmp(which, "if") == 0) { + path = check_arg_pathname("if"); + handle = dd_open_path(path, check_arg_numeric("ibs"), + options); + } else if (strcmp(which, "of") == 0) { + options |= DD_WRITE; + path = check_arg_pathname("of"); + handle = dd_open_path(path, check_arg_numeric("obs"), + options); + } else { + SMB_ASSERT(0); + return(NULL); + } + + if (!handle) { + fprintf(stderr, "%s: failed to open %s\n", PROGNAME, path); + } + + return(handle); +} + +static void set_max_xmit(uint64_t iomax) +{ + char buf[64]; + + snprintf(buf, sizeof(buf), "%llu", (unsigned long long)iomax); + lp_set_cmdline("max xmit", buf); +} + +static int copy_files(void) +{ + uint8_t * iobuf; /* IO buffer. */ + uint64_t iomax; /* Size of the IO buffer. */ + uint64_t iosz; /* Amount of data in the IO buffer. */ + + uint64_t ibs; + uint64_t obs; + uint64_t count; + + struct dd_iohandle * ifile; + struct dd_iohandle * ofile; + + ibs = check_arg_numeric("ibs"); + obs = check_arg_numeric("obs"); + count = check_arg_numeric("count"); + + /* Allocate IO buffer. We need more than the max IO size because we + * could accumulate a remainder if ibs and obs don't match. + */ + iomax = 2 * MAX(ibs, obs); + if ((iobuf = malloc(iomax)) == NULL) { + fprintf(stderr, + "%s: failed to allocate IO buffer of %llu bytes\n", + PROGNAME, (unsigned long long)iomax); + return(EOM_EXIT_CODE); + } + + set_max_xmit(MAX(ibs, obs)); + + DEBUG(4, ("IO buffer size is %llu, max xmit is %d\n", + (unsigned long long)iomax, lp_max_xmit())); + + if (!(ifile = open_file("if"))) { + return(FILESYS_EXIT_CODE); + } + + if (!(ofile = open_file("of"))) { + return(FILESYS_EXIT_CODE); + } + + /* Seek the files to their respective starting points. */ + ifile->io_seek(ifile, check_arg_numeric("skip") * ibs); + ofile->io_seek(ofile, check_arg_numeric("seek") * obs); + + DEBUG(4, ("max xmit was negotiated to be %d\n", lp_max_xmit())); + + for (iosz = 0;;) { + + /* Handle signals. We are somewhat compatible with GNU dd. + * SIGINT makes us stop, but still print transfer statistics. + * SIGUSR1 makes us print transfer statistics but we continue + * copying. + */ + if (dd_sigint) { + break; + } + + if (dd_sigusr1) { + print_transfer_stats(); + dd_sigusr1 = 0; + } + + if (ifile->io_flags & DD_END_OF_FILE) { + DEBUG(4, ("flushing %llu bytes at EOF\n", (unsigned long long)iosz)); + while (iosz > 0) { + if (!dd_flush_block(ofile, iobuf, + &iosz, obs)) { + return(IOERROR_EXIT_CODE); + } + } + goto done; + } + + /* Try and read enough blocks of ibs bytes to be able write + * out one of obs bytes. + */ + if (!dd_fill_block(ifile, iobuf, &iosz, obs, ibs)) { + return(IOERROR_EXIT_CODE); + } + + if (iosz == 0) { + /* Done. */ + SMB_ASSERT(ifile->io_flags & DD_END_OF_FILE); + } + + /* Stop reading when we hit the block count. */ + if (dd_stats.in.bytes >= (ibs * count)) { + ifile->io_flags |= DD_END_OF_FILE; + } + + /* If we wanted to be a legitimate dd, we would do character + * conversions and other shenanigans here. + */ + + /* Flush what we read in units of obs bytes. We want to have + * at least obs bytes in the IO buffer but might not if the + * file is too small. + */ + if (!dd_flush_block(ofile, iobuf, &iosz, obs)) { + return(IOERROR_EXIT_CODE); + } + } + +done: + print_transfer_stats(); + return(0); +} + +/* ------------------------------------------------------------------------- */ +/* Main. */ +/* ------------------------------------------------------------------------- */ + +struct poptOption cifsddHelpOptions[] = { + { NULL, '\0', POPT_ARG_CALLBACK, (void *)&cifsdd_help_message, '\0', NULL, NULL }, + { "help", '?', 0, NULL, '?', "Show this help message", NULL }, + { "usage", '\0', 0, NULL, 'u', "Display brief usage message", NULL }, + POPT_TABLEEND +} ; + +int main(int argc, const char ** argv) +{ + int i; + const char ** dd_args; + + poptContext pctx; + struct poptOption poptions[] = { + /* POPT_AUTOHELP */ + { NULL, '\0', POPT_ARG_INCLUDE_TABLE, cifsddHelpOptions, + 0, "Help options:", NULL }, + POPT_COMMON_SAMBA + POPT_COMMON_CONNECTION + POPT_COMMON_CREDENTIALS + POPT_COMMON_VERSION + POPT_TABLEEND + }; + + /* Block sizes. */ + set_arg_val("bs", (uint64_t)4096); + set_arg_val("ibs", (uint64_t)4096); + set_arg_val("obs", (uint64_t)4096); + /* Block counts. */ + set_arg_val("count", (uint64_t)-1); + set_arg_val("seek", (uint64_t)0); + set_arg_val("seek", (uint64_t)0); + /* Files. */ + set_arg_val("if", NULL); + set_arg_val("of", NULL); + /* Options. */ + set_arg_val("direct", False); + set_arg_val("sync", False); + set_arg_val("oplock", False); + + pctx = poptGetContext(PROGNAME, argc, argv, poptions, 0); + while ((i = poptGetNextOpt(pctx)) != -1) { + ; + } + + for (dd_args = poptGetArgs(pctx); dd_args && *dd_args; ++dd_args) { + + if (!set_arg_argv(*dd_args)) { + fprintf(stderr, "%s: invalid option: %s\n", + PROGNAME, *dd_args); + exit(SYNTAX_EXIT_CODE); + } + + /* "bs" has the side-effect of setting "ibs" and "obs". */ + if (strncmp(*dd_args, "bs=", 3) == 0) { + uint64_t bs = check_arg_numeric("bs"); + set_arg_val("ibs", bs); + set_arg_val("obs", bs); + } + } + + gensec_init(); + dump_args(); + + if (check_arg_numeric("ibs") == 0 || check_arg_numeric("ibs") == 0) { + fprintf(stderr, "%s: block sizes must be greater that zero\n", + PROGNAME); + exit(SYNTAX_EXIT_CODE); + } + + if (check_arg_pathname("if") == NULL) { + fprintf(stderr, "%s: missing input filename\n", PROGNAME); + exit(SYNTAX_EXIT_CODE); + } + + if (check_arg_pathname("of") == NULL) { + fprintf(stderr, "%s: missing output filename\n", PROGNAME); + exit(SYNTAX_EXIT_CODE); + } + + CatchSignal(SIGINT, dd_handle_signal); + CatchSignal(SIGUSR1, dd_handle_signal); + return(copy_files()); +} + +/* vim: set sw=8 sts=8 ts=8 tw=79 : */ |