From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- fs/hostfs/hostfs_user.c | 410 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 410 insertions(+) create mode 100644 fs/hostfs/hostfs_user.c (limited to 'fs/hostfs/hostfs_user.c') diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c new file mode 100644 index 000000000..9c1e0f019 --- /dev/null +++ b/fs/hostfs/hostfs_user.c @@ -0,0 +1,410 @@ +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "hostfs.h" +#include + +static void stat64_to_hostfs(const struct stat64 *buf, struct hostfs_stat *p) +{ + p->ino = buf->st_ino; + p->mode = buf->st_mode; + p->nlink = buf->st_nlink; + p->uid = buf->st_uid; + p->gid = buf->st_gid; + p->size = buf->st_size; + p->atime.tv_sec = buf->st_atime; + p->atime.tv_nsec = 0; + p->ctime.tv_sec = buf->st_ctime; + p->ctime.tv_nsec = 0; + p->mtime.tv_sec = buf->st_mtime; + p->mtime.tv_nsec = 0; + p->blksize = buf->st_blksize; + p->blocks = buf->st_blocks; + p->maj = os_major(buf->st_rdev); + p->min = os_minor(buf->st_rdev); +} + +int stat_file(const char *path, struct hostfs_stat *p, int fd) +{ + struct stat64 buf; + + if (fd >= 0) { + if (fstat64(fd, &buf) < 0) + return -errno; + } else if (lstat64(path, &buf) < 0) { + return -errno; + } + stat64_to_hostfs(&buf, p); + return 0; +} + +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; + + return dir; +} + +void seek_dir(void *stream, unsigned long long pos) +{ + DIR *dir = stream; + + seekdir(dir, pos); +} + +char *read_dir(void *stream, unsigned long long *pos_out, + unsigned long long *ino_out, int *len_out, + unsigned int *type_out) +{ + DIR *dir = stream; + struct dirent *ent; + + ent = readdir(dir); + if (ent == NULL) + return NULL; + *len_out = strlen(ent->d_name); + *ino_out = ent->d_ino; + *type_out = ent->d_type; + *pos_out = ent->d_off; + 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; +} + +int replace_file(int oldfd, int fd) +{ + return dup2(oldfd, fd); +} + +void close_file(void *stream) +{ + close(*((int *) stream)); +} + +void close_dir(void *stream) +{ + closedir(stream); +} + +int file_create(char *name, int mode) +{ + int fd; + + 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 hostfs_stat st; + struct timeval times[2]; + 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, &st, fd); + if (err != 0) + return err; + + times[0].tv_sec = st.atime.tv_sec; + times[0].tv_usec = st.atime.tv_nsec / 1000; + times[1].tv_sec = st.mtime.tv_sec; + times[1].tv_usec = st.mtime.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, &st, fd); + attrs->ia_atime = st.atime; + attrs->ia_mtime = st.mtime; + 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, os_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 hostfs_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 rename2_file(char *from, char *to, unsigned int flags) +{ + int err; + +#ifndef SYS_renameat2 +# ifdef __x86_64__ +# define SYS_renameat2 316 +# endif +# ifdef __i386__ +# define SYS_renameat2 353 +# endif +#endif + +#ifdef SYS_renameat2 + err = syscall(SYS_renameat2, AT_FDCWD, from, AT_FDCWD, to, flags); + if (err < 0) { + if (errno != ENOSYS) + return -errno; + else + return -EINVAL; + } + return 0; +#else + return -EINVAL; +#endif +} + +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) +{ + 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; + + return 0; +} -- cgit v1.2.3-54-g00ecf