Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

fs/hostfs/Makefile

@@ -0,0 +1,11 @@
+#
+# Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+hostfs-objs := hostfs_kern.o hostfs_user.o
+
+obj-y :=
+obj-$(CONFIG_HOSTFS) += hostfs.o
+
+include arch/um/scripts/Makefile.rules

fs/hostfs/hostfs.h

@@ -0,0 +1,100 @@
+#ifndef __UM_FS_HOSTFS
+#define __UM_FS_HOSTFS
+
+#include "os.h"
+
+/* These are exactly the same definitions as in fs.h, but the names are
+ * changed so that this file can be included in both kernel and user files.
+ */
+
+#define HOSTFS_ATTR_MODE	1
+#define HOSTFS_ATTR_UID 	2
+#define HOSTFS_ATTR_GID 	4
+#define HOSTFS_ATTR_SIZE	8
+#define HOSTFS_ATTR_ATIME	16
+#define HOSTFS_ATTR_MTIME	32
+#define HOSTFS_ATTR_CTIME	64
+#define HOSTFS_ATTR_ATIME_SET	128
+#define HOSTFS_ATTR_MTIME_SET	256
+
+/* These two are unused by hostfs. */
+#define HOSTFS_ATTR_FORCE	512	/* Not a change, but a change it */
+#define HOSTFS_ATTR_ATTR_FLAG	1024
+
+/* If you are very careful, you'll notice that these two are missing:
+ *
+ * #define ATTR_KILL_SUID	2048
+ * #define ATTR_KILL_SGID	4096
+ *
+ * and this is because they were added in 2.5 development in this patch:
+ *
+ * http://linux.bkbits.net:8080/linux-2.5/
+ * cset@3caf4a12k4XgDzK7wyK-TGpSZ9u2Ww?nav=index.html
+ * |src/.|src/include|src/include/linux|related/include/linux/fs.h
+ *
+ * Actually, they are not needed by most ->setattr() methods - they are set by
+ * callers of notify_change() to notify that the setuid/setgid bits must be
+ * dropped.
+ * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE
+ * is on, and remove the appropriate bits from attr->ia_mode (attr is a
+ * "struct iattr *"). -BlaisorBlade
+ */
+
+struct hostfs_iattr {
+	unsigned int	ia_valid;
+	mode_t		ia_mode;
+	uid_t		ia_uid;
+	gid_t		ia_gid;
+	loff_t		ia_size;
+	struct timespec	ia_atime;
+	struct timespec	ia_mtime;
+	struct timespec	ia_ctime;
+	unsigned int	ia_attr_flags;
+};
+
+extern int stat_file(const char *path, unsigned long long *inode_out,
+		     int *mode_out, int *nlink_out, int *uid_out, int *gid_out,
+		     unsigned long long *size_out, struct timespec *atime_out,
+		     struct timespec *mtime_out, struct timespec *ctime_out,
+		     int *blksize_out, unsigned long long *blocks_out);
+extern int access_file(char *path, int r, int w, int x);
+extern int open_file(char *path, int r, int w, int append);
+extern int file_type(const char *path, int *maj, int *min);
+extern void *open_dir(char *path, int *err_out);
+extern char *read_dir(void *stream, unsigned long long *pos,
+		      unsigned long long *ino_out, int *len_out);
+extern void close_file(void *stream);
+extern void close_dir(void *stream);
+extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
+extern int write_file(int fd, unsigned long long *offset, const char *buf,
+		      int len);
+extern int lseek_file(int fd, long long offset, int whence);
+extern int file_create(char *name, int ur, int uw, int ux, int gr,
+		       int gw, int gx, int or, int ow, int ox);
+extern int set_attr(const char *file, struct hostfs_iattr *attrs);
+extern int make_symlink(const char *from, const char *to);
+extern int unlink_file(const char *file);
+extern int do_mkdir(const char *file, int mode);
+extern int do_rmdir(const char *file);
+extern int do_mknod(const char *file, int mode, int dev);
+extern int link_file(const char *from, const char *to);
+extern int do_readlink(char *file, char *buf, int size);
+extern int rename_file(char *from, char *to);
+extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
+		     long long *bfree_out, long long *bavail_out,
+		     long long *files_out, long long *ffree_out,
+		     void *fsid_out, int fsid_size, long *namelen_out,
+		     long *spare_out);
+
+#endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */

fs/hostfs/hostfs_user.c

@@ -0,0 +1,362 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <errno.h>
+#include <utime.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/vfs.h>
+#include "hostfs.h"
+#include "kern_util.h"
+#include "user.h"
+
+int stat_file(const char *path, unsigned long long *inode_out, int *mode_out,
+	      int *nlink_out, int *uid_out, int *gid_out,
+	      unsigned long long *size_out, struct timespec *atime_out,
+	      struct timespec *mtime_out, struct timespec *ctime_out,
+	      int *blksize_out, unsigned long long *blocks_out)
+{
+	struct stat64 buf;
+
+	if(lstat64(path, &buf) < 0)
+		return(-errno);
+
+	if(inode_out != NULL) *inode_out = buf.st_ino;
+	if(mode_out != NULL) *mode_out = buf.st_mode;
+	if(nlink_out != NULL) *nlink_out = buf.st_nlink;
+	if(uid_out != NULL) *uid_out = buf.st_uid;
+	if(gid_out != NULL) *gid_out = buf.st_gid;
+	if(size_out != NULL) *size_out = buf.st_size;
+	if(atime_out != NULL) {
+		atime_out->tv_sec = buf.st_atime;
+		atime_out->tv_nsec = 0;
+	}
+	if(mtime_out != NULL) {
+		mtime_out->tv_sec = buf.st_mtime;
+		mtime_out->tv_nsec = 0;
+	}
+	if(ctime_out != NULL) {
+		ctime_out->tv_sec = buf.st_ctime;
+		ctime_out->tv_nsec = 0;
+	}
+	if(blksize_out != NULL) *blksize_out = buf.st_blksize;
+	if(blocks_out != NULL) *blocks_out = buf.st_blocks;
+	return(0);
+}
+
+int file_type(const char *path, int *maj, int *min)
+{
+ 	struct stat64 buf;
+
+	if(lstat64(path, &buf) < 0)
+		return(-errno);
+	/*We cannot pass rdev as is because glibc and the kernel disagree
+	 *about its definition.*/
+	if(maj != NULL)
+		*maj = major(buf.st_rdev);
+	if(min != NULL)
+		*min = minor(buf.st_rdev);
+
+	if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
+	else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
+	else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
+	else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
+	else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
+	else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
+	else return(OS_TYPE_FILE);
+}
+
+int access_file(char *path, int r, int w, int x)
+{
+	int mode = 0;
+
+	if(r) mode = R_OK;
+	if(w) mode |= W_OK;
+	if(x) mode |= X_OK;
+	if(access(path, mode) != 0) return(-errno);
+	else return(0);
+}
+
+int open_file(char *path, int r, int w, int append)
+{
+	int mode = 0, fd;
+
+	if(r && !w)
+		mode = O_RDONLY;
+	else if(!r && w)
+		mode = O_WRONLY;
+	else if(r && w)
+		mode = O_RDWR;
+	else panic("Impossible mode in open_file");
+
+	if(append)
+		mode |= O_APPEND;
+	fd = open64(path, mode);
+	if(fd < 0) return(-errno);
+	else return(fd);
+}
+
+void *open_dir(char *path, int *err_out)
+{
+	DIR *dir;
+
+	dir = opendir(path);
+	*err_out = errno;
+	if(dir == NULL) return(NULL);
+	return(dir);
+}
+
+char *read_dir(void *stream, unsigned long long *pos,
+	       unsigned long long *ino_out, int *len_out)
+{
+	DIR *dir = stream;
+	struct dirent *ent;
+
+	seekdir(dir, *pos);
+	ent = readdir(dir);
+	if(ent == NULL) return(NULL);
+	*len_out = strlen(ent->d_name);
+	*ino_out = ent->d_ino;
+	*pos = telldir(dir);
+	return(ent->d_name);
+}
+
+int read_file(int fd, unsigned long long *offset, char *buf, int len)
+{
+	int n;
+
+	n = pread64(fd, buf, len, *offset);
+	if(n < 0) return(-errno);
+	*offset += n;
+	return(n);
+}
+
+int write_file(int fd, unsigned long long *offset, const char *buf, int len)
+{
+	int n;
+
+	n = pwrite64(fd, buf, len, *offset);
+	if(n < 0) return(-errno);
+	*offset += n;
+	return(n);
+}
+
+int lseek_file(int fd, long long offset, int whence)
+{
+	int ret;
+
+	ret = lseek64(fd, offset, whence);
+	if(ret < 0) return(-errno);
+	return(0);
+}
+
+void close_file(void *stream)
+{
+	close(*((int *) stream));
+}
+
+void close_dir(void *stream)
+{
+	closedir(stream);
+}
+
+int file_create(char *name, int ur, int uw, int ux, int gr,
+		int gw, int gx, int or, int ow, int ox)
+{
+	int mode, fd;
+
+	mode = 0;
+	mode |= ur ? S_IRUSR : 0;
+	mode |= uw ? S_IWUSR : 0;
+	mode |= ux ? S_IXUSR : 0;
+	mode |= gr ? S_IRGRP : 0;
+	mode |= gw ? S_IWGRP : 0;
+	mode |= gx ? S_IXGRP : 0;
+	mode |= or ? S_IROTH : 0;
+	mode |= ow ? S_IWOTH : 0;
+	mode |= ox ? S_IXOTH : 0;
+	fd = open64(name, O_CREAT | O_RDWR, mode);
+	if(fd < 0)
+		return(-errno);
+	return(fd);
+}
+
+int set_attr(const char *file, struct hostfs_iattr *attrs)
+{
+	struct utimbuf buf;
+	int err, ma;
+
+	if(attrs->ia_valid & HOSTFS_ATTR_MODE){
+		if(chmod(file, attrs->ia_mode) != 0) return(-errno);
+	}
+	if(attrs->ia_valid & HOSTFS_ATTR_UID){
+		if(chown(file, attrs->ia_uid, -1)) return(-errno);
+	}
+	if(attrs->ia_valid & HOSTFS_ATTR_GID){
+		if(chown(file, -1, attrs->ia_gid)) return(-errno);
+	}
+	if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
+		if(truncate(file, attrs->ia_size)) return(-errno);
+	}
+	ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
+	if((attrs->ia_valid & ma) == ma){
+		buf.actime = attrs->ia_atime.tv_sec;
+		buf.modtime = attrs->ia_mtime.tv_sec;
+		if(utime(file, &buf) != 0) return(-errno);
+	}
+	else {
+		struct timespec ts;
+
+		if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
+			err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
+					NULL, NULL, &ts, NULL, NULL, NULL);
+			if(err != 0)
+				return(err);
+			buf.actime = attrs->ia_atime.tv_sec;
+			buf.modtime = ts.tv_sec;
+			if(utime(file, &buf) != 0)
+				return(-errno);
+		}
+		if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
+			err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
+					NULL, &ts, NULL, NULL, NULL, NULL);
+			if(err != 0)
+				return(err);
+			buf.actime = ts.tv_sec;
+			buf.modtime = attrs->ia_mtime.tv_sec;
+			if(utime(file, &buf) != 0)
+				return(-errno);
+		}
+	}
+	if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
+	if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
+		err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
+				&attrs->ia_atime, &attrs->ia_mtime, NULL,
+				NULL, NULL);
+		if(err != 0) return(err);
+	}
+	return(0);
+}
+
+int make_symlink(const char *from, const char *to)
+{
+	int err;
+
+	err = symlink(to, from);
+	if(err) return(-errno);
+	return(0);
+}
+
+int unlink_file(const char *file)
+{
+	int err;
+
+	err = unlink(file);
+	if(err) return(-errno);
+	return(0);
+}
+
+int do_mkdir(const char *file, int mode)
+{
+	int err;
+
+	err = mkdir(file, mode);
+	if(err) return(-errno);
+	return(0);
+}
+
+int do_rmdir(const char *file)
+{
+	int err;
+
+	err = rmdir(file);
+	if(err) return(-errno);
+	return(0);
+}
+
+int do_mknod(const char *file, int mode, int dev)
+{
+	int err;
+
+	err = mknod(file, mode, dev);
+	if(err) return(-errno);
+	return(0);
+}
+
+int link_file(const char *to, const char *from)
+{
+	int err;
+
+	err = link(to, from);
+	if(err) return(-errno);
+	return(0);
+}
+
+int do_readlink(char *file, char *buf, int size)
+{
+	int n;
+
+	n = readlink(file, buf, size);
+	if(n < 0)
+		return(-errno);
+	if(n < size)
+		buf[n] = '\0';
+	return(n);
+}
+
+int rename_file(char *from, char *to)
+{
+	int err;
+
+	err = rename(from, to);
+	if(err < 0) return(-errno);
+	return(0);
+}
+
+int do_statfs(char *root, long *bsize_out, long long *blocks_out,
+	      long long *bfree_out, long long *bavail_out,
+	      long long *files_out, long long *ffree_out,
+	      void *fsid_out, int fsid_size, long *namelen_out,
+	      long *spare_out)
+{
+	struct statfs64 buf;
+	int err;
+
+	err = statfs64(root, &buf);
+	if(err < 0) return(-errno);
+	*bsize_out = buf.f_bsize;
+	*blocks_out = buf.f_blocks;
+	*bfree_out = buf.f_bfree;
+	*bavail_out = buf.f_bavail;
+	*files_out = buf.f_files;
+	*ffree_out = buf.f_ffree;
+	memcpy(fsid_out, &buf.f_fsid,
+	       sizeof(buf.f_fsid) > fsid_size ? fsid_size :
+	       sizeof(buf.f_fsid));
+	*namelen_out = buf.f_namelen;
+	spare_out[0] = buf.f_spare[0];
+	spare_out[1] = buf.f_spare[1];
+	spare_out[2] = buf.f_spare[2];
+	spare_out[3] = buf.f_spare[3];
+	spare_out[4] = buf.f_spare[4];
+	spare_out[5] = buf.f_spare[5];
+	return(0);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */