/* * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <stdio.h> #include <stddef.h> #include <unistd.h> #include <dirent.h> #include <errno.h> #include <fcntl.h> #include <string.h> #include <sys/stat.h> #include <sys/time.h> #include <sys/types.h> #include <sys/vfs.h> #include "hostfs.h" #include "os.h" #include "user.h" #include <utime.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; } } /* Note: ctime is not handled */ 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; }