static int affs_remount(struct super_block *sb, int *flags, char *data) { struct affs_sb_info *sbi = AFFS_SB(sb); int blocksize; uid_t uid; gid_t gid; int mode; int reserved; int root_block; unsigned long mount_flags; int res = 0; char *new_opts = kstrdup(data, GFP_KERNEL); char volume[32]; char *prefix = NULL; pr_debug("AFFS: remount(flags=0x%x,opts=\"%s\")\n",*flags,data); *flags |= MS_NODIRATIME; memcpy(volume, sbi->s_volume, 32); if (!parse_options(data, &uid, &gid, &mode, &reserved, &root_block, &blocksize, &prefix, volume, &mount_flags)) { kfree(prefix); kfree(new_opts); return -EINVAL; } lock_kernel(); replace_mount_options(sb, new_opts); sbi->s_flags = mount_flags; sbi->s_mode = mode; sbi->s_uid = uid; sbi->s_gid = gid; /* protect against readers */ spin_lock(&sbi->symlink_lock); if (prefix) { kfree(sbi->s_prefix); sbi->s_prefix = prefix; } memcpy(sbi->s_volume, volume, 32); spin_unlock(&sbi->symlink_lock); if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { unlock_kernel(); return 0; } if (*flags & MS_RDONLY) { sb->s_dirt = 1; while (sb->s_dirt) affs_write_super(sb); affs_free_bitmap(sb); } else res = affs_init_bitmap(sb, flags); unlock_kernel(); return res; }
static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) { uid_t uid; gid_t gid; umode_t umask; int lowercase, eas, chk, errs, chkdsk, timeshift; int o; struct hpfs_sb_info *sbi = hpfs_sb(s); char *new_opts = kstrdup(data, GFP_KERNEL); sync_filesystem(s); *flags |= MS_NOATIME; hpfs_lock(s); lock_super(s); uid = sbi->sb_uid; gid = sbi->sb_gid; umask = 0777 & ~sbi->sb_mode; lowercase = sbi->sb_lowercase; eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; errs = sbi->sb_err; timeshift = sbi->sb_timeshift; if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, &eas, &chk, &errs, &chkdsk, ×hift))) { printk("HPFS: bad mount options.\n"); goto out_err; } if (o == 2) { hpfs_help(); goto out_err; } if (timeshift != sbi->sb_timeshift) { printk("HPFS: timeshift can't be changed using remount.\n"); goto out_err; } unmark_dirty(s); sbi->sb_uid = uid; sbi->sb_gid = gid; sbi->sb_mode = 0777 & ~umask; sbi->sb_lowercase = lowercase; sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; sbi->sb_err = errs; sbi->sb_timeshift = timeshift; if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); replace_mount_options(s, new_opts); unlock_super(s); hpfs_unlock(s); return 0; out_err: unlock_super(s); hpfs_unlock(s); kfree(new_opts); return -EINVAL; }
static int capifs_remount(struct super_block *s, int *flags, char *data) { int setuid = 0; int setgid = 0; uid_t uid = 0; gid_t gid = 0; umode_t mode = 0600; char *this_char; char *new_opt = kstrdup(data, GFP_KERNEL); this_char = NULL; while ((this_char = strsep(&data, ",")) != NULL) { int n; char dummy; if (!*this_char) continue; if (sscanf(this_char, "uid=%i%c", &n, &dummy) == 1) { setuid = 1; uid = n; } else if (sscanf(this_char, "gid=%i%c", &n, &dummy) == 1) { setgid = 1; gid = n; } else if (sscanf(this_char, "mode=%o%c", &n, &dummy) == 1) mode = n & ~S_IFMT; else { kfree(new_opt); printk("capifs: called with bogus options\n"); return -EINVAL; } } mutex_lock(&s->s_root->d_inode->i_mutex); replace_mount_options(s, new_opt); config.setuid = setuid; config.setgid = setgid; config.uid = uid; config.gid = gid; config.mode = mode; mutex_unlock(&s->s_root->d_inode->i_mutex); return 0; }