diff options
Diffstat (limited to 'fs/aufs/ioctl.c')
| -rw-r--r-- | fs/aufs/ioctl.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/fs/aufs/ioctl.c b/fs/aufs/ioctl.c deleted file mode 100644 index 6528fb911..000000000 --- a/fs/aufs/ioctl.c +++ /dev/null @@ -1,206 +0,0 @@ -/* - * Copyright (C) 2005-2016 Junjiro R. Okajima - */ - -/* - * ioctl - * plink-management and readdir in userspace. - * assist the pathconf(3) wrapper library. - * move-down - * File-based Hierarchical Storage Management. - */ - -#include <linux/compat.h> -#include <linux/file.h> -#include "aufs.h" - -static int au_wbr_fd(struct path *path, struct aufs_wbr_fd __user *arg) -{ - int err, fd; - aufs_bindex_t wbi, bindex, bend; - struct file *h_file; - struct super_block *sb; - struct dentry *root; - struct au_branch *br; - struct aufs_wbr_fd wbrfd = { - .oflags = au_dir_roflags, - .brid = -1 - }; - const int valid = O_RDONLY | O_NONBLOCK | O_LARGEFILE | O_DIRECTORY - | O_NOATIME | O_CLOEXEC; - - AuDebugOn(wbrfd.oflags & ~valid); - - if (arg) { - err = copy_from_user(&wbrfd, arg, sizeof(wbrfd)); - if (unlikely(err)) { - err = -EFAULT; - goto out; - } - - err = -EINVAL; - AuDbg("wbrfd{0%o, %d}\n", wbrfd.oflags, wbrfd.brid); - wbrfd.oflags |= au_dir_roflags; - AuDbg("0%o\n", wbrfd.oflags); - if (unlikely(wbrfd.oflags & ~valid)) - goto out; - } - - fd = get_unused_fd_flags(0); - err = fd; - if (unlikely(fd < 0)) - goto out; - - h_file = ERR_PTR(-EINVAL); - wbi = 0; - br = NULL; - sb = path->dentry->d_sb; - root = sb->s_root; - aufs_read_lock(root, AuLock_IR); - bend = au_sbend(sb); - if (wbrfd.brid >= 0) { - wbi = au_br_index(sb, wbrfd.brid); - if (unlikely(wbi < 0 || wbi > bend)) - goto out_unlock; - } - - h_file = ERR_PTR(-ENOENT); - br = au_sbr(sb, wbi); - if (!au_br_writable(br->br_perm)) { - if (arg) - goto out_unlock; - - bindex = wbi + 1; - wbi = -1; - for (; bindex <= bend; bindex++) { - br = au_sbr(sb, bindex); - if (au_br_writable(br->br_perm)) { - wbi = bindex; - br = au_sbr(sb, wbi); - break; - } - } - } - AuDbg("wbi %d\n", wbi); - if (wbi >= 0) - h_file = au_h_open(root, wbi, wbrfd.oflags, NULL, - /*force_wr*/0); - -out_unlock: - aufs_read_unlock(root, AuLock_IR); - err = PTR_ERR(h_file); - if (IS_ERR(h_file)) - goto out_fd; - - atomic_dec(&br->br_count); /* cf. au_h_open() */ - fd_install(fd, h_file); - err = fd; - goto out; /* success */ - -out_fd: - put_unused_fd(fd); -out: - AuTraceErr(err); - return err; -} - -/* ---------------------------------------------------------------------- */ - -long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg) -{ - long err; - struct dentry *dentry; - - switch (cmd) { - case AUFS_CTL_RDU: - case AUFS_CTL_RDU_INO: - err = au_rdu_ioctl(file, cmd, arg); - break; - - case AUFS_CTL_WBR_FD: - err = au_wbr_fd(&file->f_path, (void __user *)arg); - break; - - case AUFS_CTL_IBUSY: - err = au_ibusy_ioctl(file, arg); - break; - - case AUFS_CTL_BRINFO: - err = au_brinfo_ioctl(file, arg); - break; - - case AUFS_CTL_FHSM_FD: - dentry = file->f_path.dentry; - if (IS_ROOT(dentry)) - err = au_fhsm_fd(dentry->d_sb, arg); - else - err = -ENOTTY; - break; - - default: - /* do not call the lower */ - AuDbg("0x%x\n", cmd); - err = -ENOTTY; - } - - AuTraceErr(err); - return err; -} - -long aufs_ioctl_nondir(struct file *file, unsigned int cmd, unsigned long arg) -{ - long err; - - switch (cmd) { - case AUFS_CTL_MVDOWN: - err = au_mvdown(file->f_path.dentry, (void __user *)arg); - break; - - case AUFS_CTL_WBR_FD: - err = au_wbr_fd(&file->f_path, (void __user *)arg); - break; - - default: - /* do not call the lower */ - AuDbg("0x%x\n", cmd); - err = -ENOTTY; - } - - AuTraceErr(err); - return err; -} - -#ifdef CONFIG_COMPAT -long aufs_compat_ioctl_dir(struct file *file, unsigned int cmd, - unsigned long arg) -{ - long err; - - switch (cmd) { - case AUFS_CTL_RDU: - case AUFS_CTL_RDU_INO: - err = au_rdu_compat_ioctl(file, cmd, arg); - break; - - case AUFS_CTL_IBUSY: - err = au_ibusy_compat_ioctl(file, arg); - break; - - case AUFS_CTL_BRINFO: - err = au_brinfo_compat_ioctl(file, arg); - break; - - default: - err = aufs_ioctl_dir(file, cmd, arg); - } - - AuTraceErr(err); - return err; -} - -long aufs_compat_ioctl_nondir(struct file *file, unsigned int cmd, - unsigned long arg) -{ - return aufs_ioctl_nondir(file, cmd, (unsigned long)compat_ptr(arg)); -} -#endif |