1 files changed, 362 insertions, 0 deletions

diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
new file mode 100644
index 000000000000..4796e8490f7d
--- /dev/null
+++ b/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:
+ */