+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- Copyright (C) Andrew Tridgell 2005
- Updated for Samba3 64-bit cleanliness (C) Jeremy Allison 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 3 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, see <http://www.gnu.org/licenses/>.
-*/
-/*
- a replacement for opendir/readdir/telldir/seekdir/closedir for BSD systems
-
- This is needed because the existing directory handling in FreeBSD
- and OpenBSD (and possibly NetBSD) doesn't correctly handle unlink()
- on files in a directory where telldir() has been used. On a block
- boundary it will occasionally miss a file when seekdir() is used to
- return to a position previously recorded with telldir().
-
- This also fixes a severe performance and memory usage problem with
- telldir() on BSD systems. Each call to telldir() in BSD adds an
- entry to a linked list, and those entries are cleaned up on
- closedir(). This means with a large directory closedir() can take an
- arbitrary amount of time, causing network timeouts as millions of
- telldir() entries are freed
-
- Note! This replacement code is not portable. It relies on getdents()
- always leaving the file descriptor at a seek offset that is a
- multiple of DIR_BUF_SIZE. If the code detects that this doesn't
- happen then it will abort(). It also does not handle directories
- with offsets larger than can be stored in a long,
-
- This code is available under other free software licenses as
- well. Contact the author.
-*/
-
-#include <include/includes.h>
-
- void replace_readdir_dummy(void);
- void replace_readdir_dummy(void) {}
-
-#if defined(REPLACE_READDIR)
-
-#if defined(PARANOID_MALLOC_CHECKER)
-#ifdef malloc
-#undef malloc
-#endif
-#endif
-
-#define DIR_BUF_BITS 9
-#define DIR_BUF_SIZE (1<<DIR_BUF_BITS)
-
-struct dir_buf {
- int fd;
- int nbytes, ofs;
- SMB_OFF_T seekpos;
- char buf[DIR_BUF_SIZE];
-};
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OPENDIR64)
- SMB_STRUCT_DIR *opendir64(const char *dname)
-#else
- SMB_STRUCT_DIR *opendir(const char *dname)
-#endif
-{
- struct dir_buf *d;
- d = malloc(sizeof(*d));
- if (d == NULL) {
- errno = ENOMEM;
- return NULL;
- }
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OPEN64)
- d->fd = open64(dname, O_RDONLY);
-#else
- d->fd = open(dname, O_RDONLY);
-#endif
-
- if (d->fd == -1) {
- free(d);
- return NULL;
- }
- d->ofs = 0;
- d->seekpos = 0;
- d->nbytes = 0;
- return (SMB_STRUCT_DIR *)d;
-}
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_READDIR64)
- SMB_STRUCT_DIRENT *readdir64(SMB_STRUCT_DIR *dir)
-#else
- SMB_STRUCT_DIRENT *readdir(SMB_STRUCT_DIR *dir)
-#endif
-{
- struct dir_buf *d = (struct dir_buf *)dir;
- SMB_STRUCT_DIRENT *de;
-
- if (d->ofs >= d->nbytes) {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64)
- d->seekpos = lseek64(d->fd, 0, SEEK_CUR);
-#else
- d->seekpos = lseek(d->fd, 0, SEEK_CUR);
-#endif
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_GETDENTS64)
- d->nbytes = getdents64(d->fd, d->buf, DIR_BUF_SIZE);
-#else
- d->nbytes = getdents(d->fd, d->buf, DIR_BUF_SIZE);
-#endif
- d->ofs = 0;
- }
- if (d->ofs >= d->nbytes) {
- return NULL;
- }
- de = (SMB_STRUCT_DIRENT *)&d->buf[d->ofs];
- d->ofs += de->d_reclen;
- return de;
-}
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_TELLDIR64)
- long telldir64(SMB_STRUCT_DIR *dir)
-#else
- long telldir(SMB_STRUCT_DIR *dir)
-#endif
-{
- struct dir_buf *d = (struct dir_buf *)dir;
- if (d->ofs >= d->nbytes) {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64)
- d->seekpos = lseek64(d->fd, 0, SEEK_CUR);
-#else
- d->seekpos = lseek(d->fd, 0, SEEK_CUR);
-#endif
- d->ofs = 0;
- d->nbytes = 0;
- }
- /* this relies on seekpos always being a multiple of
- DIR_BUF_SIZE. Is that always true on BSD systems? */
- if (d->seekpos & (DIR_BUF_SIZE-1)) {
- abort();
- }
- return d->seekpos + d->ofs;
-}
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_SEEKDIR64)
- void seekdir64(SMB_STRUCT_DIR *dir, long ofs)
-#else
- void seekdir(SMB_STRUCT_DIR *dir, long ofs)
-#endif
-{
- struct dir_buf *d = (struct dir_buf *)dir;
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64)
- d->seekpos = lseek64(d->fd, ofs & ~(DIR_BUF_SIZE-1), SEEK_SET);
-#else
- d->seekpos = lseek(d->fd, ofs & ~(DIR_BUF_SIZE-1), SEEK_SET);
-#endif
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_GETDENTS64)
- d->nbytes = getdents64(d->fd, d->buf, DIR_BUF_SIZE);
-#else
- d->nbytes = getdents(d->fd, d->buf, DIR_BUF_SIZE);
-#endif
-
- d->ofs = 0;
- while (d->ofs < (ofs & (DIR_BUF_SIZE-1))) {
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_READDIR64)
- if (readdir64(dir) == NULL) break;
-#else
- if (readdir(dir) == NULL) break;
-#endif
- }
-}
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_REWINDDIR64)
- void rewinddir64(SMB_STRUCT_DIR *dir)
-#else
- void rewinddir(SMB_STRUCT_DIR *dir)
-#endif
-{
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_SEEKDIR64)
- seekdir64(dir, 0);
-#else
- seekdir(dir, 0);
-#endif
-}
-
-#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_CLOSEDIR64)
- int closedir64(SMB_STRUCT_DIR *dir)
-#else
- int closedir(SMB_STRUCT_DIR *dir)
-#endif
-{
- struct dir_buf *d = (struct dir_buf *)dir;
- int r = close(d->fd);
- if (r != 0) {
- return r;
- }
- free(d);
- return 0;
-}
-
-#ifndef dirfd
-/* darn, this is a macro on some systems. */
- int dirfd(SMB_STRUCT_DIR *dir)
-{
- struct dir_buf *d = (struct dir_buf *)dir;
- return d->fd;
-}
-#endif
-#endif /* REPLACE_READDIR */
+++ /dev/null
-/*
- test readdir/unlink pattern that OS/2 uses
- tridge@samba.org July 2005
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <errno.h>
-#include <string.h>
-#include <fcntl.h>
-
-#define NUM_FILES 700
-#define READDIR_SIZE 100
-#define DELETE_SIZE 4
-
-#define TESTDIR "test.dir"
-
-#define FAILED(d) (fprintf(stderr, "Failed for %s - %s\n", d, strerror(errno)), exit(1), 1)
-
-#ifndef MIN
-#define MIN(a,b) ((a)<(b)?(a):(b))
-#endif
-
-static void cleanup(void)
-{
- /* I'm a lazy bastard */
- system("rm -rf " TESTDIR);
- mkdir(TESTDIR, 0700) == 0 || FAILED("mkdir");
-}
-
-static void create_files()
-{
- int i;
- for (i=0;i<NUM_FILES;i++) {
- char fname[40];
- sprintf(fname, TESTDIR "/test%u.txt", i);
- close(open(fname, O_CREAT|O_RDWR, 0600)) == 0 || FAILED("close");
- }
-}
-
-static int os2_delete(DIR *d)
-{
- off_t offsets[READDIR_SIZE];
- int i, j;
- struct dirent *de;
- char names[READDIR_SIZE][30];
-
- /* scan, remembering offsets */
- for (i=0, de=readdir(d);
- de && i < READDIR_SIZE;
- de=readdir(d), i++) {
- offsets[i] = telldir(d);
- strcpy(names[i], de->d_name);
- }
-
- if (i == 0) {
- return 0;
- }
-
- /* delete the first few */
- for (j=0; j<MIN(i, DELETE_SIZE); j++) {
- char fname[40];
- sprintf(fname, TESTDIR "/%s", names[j]);
- unlink(fname) == 0 || FAILED("unlink");
- }
-
- /* seek to just after the deletion */
- seekdir(d, offsets[j-1]);
-
- /* return number deleted */
- return j;
-}
-
-int main(void)
-{
- int total_deleted = 0;
- DIR *d;
- struct dirent *de;
-
- cleanup();
- create_files();
-
- d = opendir(TESTDIR);
-
- /* skip past . and .. */
- de = readdir(d);
- strcmp(de->d_name, ".") == 0 || FAILED("match .");
- de = readdir(d);
- strcmp(de->d_name, "..") == 0 || FAILED("match ..");
-
- while (1) {
- int n = os2_delete(d);
- if (n == 0) break;
- total_deleted += n;
- }
- closedir(d);
-
- printf("Deleted %d files of %d\n", total_deleted, NUM_FILES);
-
- rmdir(TESTDIR) == 0 || FAILED("rmdir");
-
- return 0;
-}
-/*
- test readdir/unlink pattern that OS/2 uses
- tridge@samba.org July 2005
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <errno.h>
-#include <string.h>
-#include <fcntl.h>
-
-#define NUM_FILES 700
-#define READDIR_SIZE 100
-#define DELETE_SIZE 4
-
-#define TESTDIR "test.dir"
-
-#define FAILED(d) (fprintf(stderr, "Failed for %s - %s\n", d, strerror(errno)), exit(1), 1)
-
-#ifndef MIN
-#define MIN(a,b) ((a)<(b)?(a):(b))
-#endif
-
-static void cleanup(void)
-{
- /* I'm a lazy bastard */
- system("rm -rf " TESTDIR);
- mkdir(TESTDIR, 0700) == 0 || FAILED("mkdir");
-}
-
-static void create_files()
-{
- int i;
- for (i=0;i<NUM_FILES;i++) {
- char fname[40];
- sprintf(fname, TESTDIR "/test%u.txt", i);
- close(open(fname, O_CREAT|O_RDWR, 0600)) == 0 || FAILED("close");
- }
-}
-
-static int os2_delete(DIR *d)
-{
- off_t offsets[READDIR_SIZE];
- int i, j;
- struct dirent *de;
- char names[READDIR_SIZE][30];
-
- /* scan, remembering offsets */
- for (i=0, de=readdir(d);
- de && i < READDIR_SIZE;
- de=readdir(d), i++) {
- offsets[i] = telldir(d);
- strcpy(names[i], de->d_name);
- }
-
- if (i == 0) {
- return 0;
- }
-
- /* delete the first few */
- for (j=0; j<MIN(i, DELETE_SIZE); j++) {
- char fname[40];
- sprintf(fname, TESTDIR "/%s", names[j]);
- unlink(fname) == 0 || FAILED("unlink");
- }
-
- /* seek to just after the deletion */
- seekdir(d, offsets[j-1]);
-
- /* return number deleted */
- return j;
-}
-
-int main(void)
-{
- int total_deleted = 0;
- DIR *d;
- struct dirent *de;
-
- cleanup();
- create_files();
-
- d = opendir(TESTDIR);
-
- /* skip past . and .. */
- de = readdir(d);
- strcmp(de->d_name, ".") == 0 || FAILED("match .");
- de = readdir(d);
- strcmp(de->d_name, "..") == 0 || FAILED("match ..");
-
- while (1) {
- int n = os2_delete(d);
- if (n == 0) break;
- total_deleted += n;
- }
- closedir(d);
-
- printf("Deleted %d files of %d\n", total_deleted, NUM_FILES);
-
- rmdir(TESTDIR) == 0 || FAILED("rmdir");
-
- return 0;
-}
git.samba.org / sfrench / samba-autobuild / .git / commitdiff