fs/hostfs/hostfs_user.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.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, int fd)
 {
 	struct stat64 buf;

 	if(fd >= 0) {
 		if (fstat64(fd, &buf) < 0)
 			return -errno;
 	} else 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;
 }

 int fsync_file(int fd, int datasync)
 {
 	int ret;
 	if (datasync)
 		ret = fdatasync(fd);
 	else
 		ret = fsync(fd);

 	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, int fd)
 {
 	struct timeval times[2];
 	struct timespec atime_ts, mtime_ts;
 	int err, ma;

 	if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
 		if (fd >= 0) {
 			if (fchmod(fd, attrs->ia_mode) != 0)
 				return (-errno);
 		} else if (chmod(file, attrs->ia_mode) != 0) {
 			return -errno;
 		}
 	}
 	if (attrs->ia_valid & HOSTFS_ATTR_UID) {
 		if (fd >= 0) {
 			if (fchown(fd, attrs->ia_uid, -1))
 				return -errno;
 		} else if(chown(file, attrs->ia_uid, -1)) {
 			return -errno;
 		}
 	}
 	if (attrs->ia_valid & HOSTFS_ATTR_GID) {
 		if (fd >= 0) {
 			if (fchown(fd, -1, attrs->ia_gid))
 				return -errno;
 		} else if (chown(file, -1, attrs->ia_gid)) {
 			return -errno;
 		}
 	}
 	if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
 		if (fd >= 0) {
 			if (ftruncate(fd, attrs->ia_size))
 				return -errno;
 		} else if (truncate(file, attrs->ia_size)) {
 			return -errno;
 		}
 	}

 	/* Update accessed and/or modified time, in two parts: first set
 	 * times according to the changes to perform, and then call futimes()
 	 * or utimes() to apply them. */
 	ma = (HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET);
 	if (attrs->ia_valid & ma) {
 		err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
 				&atime_ts, &mtime_ts, NULL, NULL, NULL, fd);
 		if (err != 0)
 			return err;

 		times[0].tv_sec = atime_ts.tv_sec;
 		times[0].tv_usec = atime_ts.tv_nsec * 1000;
 		times[1].tv_sec = mtime_ts.tv_sec;
 		times[1].tv_usec = mtime_ts.tv_nsec * 1000;

 		if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
 			times[0].tv_sec = attrs->ia_atime.tv_sec;
 			times[0].tv_usec = attrs->ia_atime.tv_nsec * 1000;
 		}
 		if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
 			times[1].tv_sec = attrs->ia_mtime.tv_sec;
 			times[1].tv_usec = attrs->ia_mtime.tv_nsec * 1000;
 		}

 		if (fd >= 0) {
 			if (futimes(fd, times) != 0)
 				return -errno;
 		} else if (utimes(file, times) != 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, fd);
 		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, unsigned int major, unsigned int minor)
 {
 	int err;

 	err = mknod(file, mode, makedev(major, minor));
 	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];
 	return 0;
 }
	/*
	* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.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, int fd)
	{
	struct stat64 buf;

	if(fd >= 0) {
	if (fstat64(fd, &buf) < 0)
	return -errno;
	} else 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;
	}

	int fsync_file(int fd, int datasync)
	{
	int ret;
	if (datasync)
	ret = fdatasync(fd);
	else
	ret = fsync(fd);

	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, int fd)
	{
	struct timeval times[2];
	struct timespec atime_ts, mtime_ts;
	int err, ma;

	if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
	if (fd >= 0) {
	if (fchmod(fd, attrs->ia_mode) != 0)
	return (-errno);
	} else if (chmod(file, attrs->ia_mode) != 0) {
	return -errno;
	}
	}
	if (attrs->ia_valid & HOSTFS_ATTR_UID) {
	if (fd >= 0) {
	if (fchown(fd, attrs->ia_uid, -1))
	return -errno;
	} else if(chown(file, attrs->ia_uid, -1)) {
	return -errno;
	}
	}
	if (attrs->ia_valid & HOSTFS_ATTR_GID) {
	if (fd >= 0) {
	if (fchown(fd, -1, attrs->ia_gid))
	return -errno;
	} else if (chown(file, -1, attrs->ia_gid)) {
	return -errno;
	}
	}
	if (attrs->ia_valid & HOSTFS_ATTR_SIZE) {
	if (fd >= 0) {
	if (ftruncate(fd, attrs->ia_size))
	return -errno;
	} else if (truncate(file, attrs->ia_size)) {
	return -errno;
	}
	}

	/* Update accessed and/or modified time, in two parts: first set
	* times according to the changes to perform, and then call futimes()
	* or utimes() to apply them. */
	ma = (HOSTFS_ATTR_ATIME_SET \| HOSTFS_ATTR_MTIME_SET);
	if (attrs->ia_valid & ma) {
	err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
	&atime_ts, &mtime_ts, NULL, NULL, NULL, fd);
	if (err != 0)
	return err;

	times[0].tv_sec = atime_ts.tv_sec;
	times[0].tv_usec = atime_ts.tv_nsec * 1000;
	times[1].tv_sec = mtime_ts.tv_sec;
	times[1].tv_usec = mtime_ts.tv_nsec * 1000;

	if (attrs->ia_valid & HOSTFS_ATTR_ATIME_SET) {
	times[0].tv_sec = attrs->ia_atime.tv_sec;
	times[0].tv_usec = attrs->ia_atime.tv_nsec * 1000;
	}
	if (attrs->ia_valid & HOSTFS_ATTR_MTIME_SET) {
	times[1].tv_sec = attrs->ia_mtime.tv_sec;
	times[1].tv_usec = attrs->ia_mtime.tv_nsec * 1000;
	}

	if (fd >= 0) {
	if (futimes(fd, times) != 0)
	return -errno;
	} else if (utimes(file, times) != 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, fd);
	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, unsigned int major, unsigned int minor)
	{
	int err;

	err = mknod(file, mode, makedev(major, minor));
	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];
	return 0;
	}