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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252// SPDX-License-Identifier: GPL-2.0/* * linux/fs/bad_inode.c * * Copyright (C) 1997, Stephen Tweedie * * Provide stub functions for unreadable inodes * * Fabian Frederick : August 2003 - All file operations assigned to EIO */
#include <linux/fs.h>#include <linux/export.h>#include <linux/stat.h>#include <linux/time.h>#include <linux/namei.h>#include <linux/poll.h>#include <linux/fiemap.h>
static int bad_file_open(struct inode *inode, struct file *filp){ return -EIO;}
static const struct file_operations bad_file_ops ={ .open = bad_file_open,};
static int bad_inode_create(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, bool excl){ return -EIO;}
static struct dentry *bad_inode_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags){ return ERR_PTR(-EIO);}
static int bad_inode_link (struct dentry *old_dentry, struct inode *dir, struct dentry *dentry){ return -EIO;}
static int bad_inode_unlink(struct inode *dir, struct dentry *dentry){ return -EIO;}
static int bad_inode_symlink(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, const char *symname){ return -EIO;}
static struct dentry *bad_inode_mkdir(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode){ return ERR_PTR(-EIO);}
static int bad_inode_rmdir (struct inode *dir, struct dentry *dentry){ return -EIO;}
static int bad_inode_mknod(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev){ return -EIO;}
static int bad_inode_rename2(struct mnt_idmap *idmap, struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags){ return -EIO;}
static int bad_inode_readlink(struct dentry *dentry, char __user *buffer, int buflen){ return -EIO;}
static int bad_inode_permission(struct mnt_idmap *idmap, struct inode *inode, int mask){ return -EIO;}
static int bad_inode_getattr(struct mnt_idmap *idmap, const struct path *path, struct kstat *stat, u32 request_mask, unsigned int query_flags){ return -EIO;}
static int bad_inode_setattr(struct mnt_idmap *idmap, struct dentry *direntry, struct iattr *attrs){ return -EIO;}
static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size){ return -EIO;}
static const char *bad_inode_get_link(struct dentry *dentry, struct inode *inode, struct delayed_call *done){ return ERR_PTR(-EIO);}
static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type, bool rcu){ return ERR_PTR(-EIO);}
static int bad_inode_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len){ return -EIO;}
static int bad_inode_update_time(struct inode *inode, enum fs_update_time type, unsigned int flags){ return -EIO;}
static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry, struct file *file, unsigned int open_flag, umode_t create_mode){ return -EIO;}
static int bad_inode_tmpfile(struct mnt_idmap *idmap, struct inode *inode, struct file *file, umode_t mode){ return -EIO;}
static int bad_inode_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, struct posix_acl *acl, int type){ return -EIO;}
static const struct inode_operations bad_inode_ops ={ .create = bad_inode_create, .lookup = bad_inode_lookup, .link = bad_inode_link, .unlink = bad_inode_unlink, .symlink = bad_inode_symlink, .mkdir = bad_inode_mkdir, .rmdir = bad_inode_rmdir, .mknod = bad_inode_mknod, .rename = bad_inode_rename2, .readlink = bad_inode_readlink, .permission = bad_inode_permission, .getattr = bad_inode_getattr, .setattr = bad_inode_setattr, .listxattr = bad_inode_listxattr, .get_link = bad_inode_get_link, .get_inode_acl = bad_inode_get_acl, .fiemap = bad_inode_fiemap, .update_time = bad_inode_update_time, .atomic_open = bad_inode_atomic_open, .tmpfile = bad_inode_tmpfile, .set_acl = bad_inode_set_acl,};
/* * When a filesystem is unable to read an inode due to an I/O error in * its read_inode() function, it can call make_bad_inode() to return a * set of stubs which will return EIO errors as required. * * We only need to do limited initialisation: all other fields are * preinitialised to zero automatically. */ /** * make_bad_inode - mark an inode bad due to an I/O error * @inode: Inode to mark bad * * When an inode cannot be read due to a media or remote network * failure this function makes the inode "bad" and causes I/O operations * on it to fail from this point on. */ void make_bad_inode(struct inode *inode){ remove_inode_hash(inode);
inode->i_mode = S_IFREG; simple_inode_init_ts(inode); inode->i_op = &bad_inode_ops; inode->i_opflags &= ~IOP_XATTR; inode->i_fop = &bad_file_ops; }EXPORT_SYMBOL(make_bad_inode);
/* * This tests whether an inode has been flagged as bad. The test uses * &bad_inode_ops to cover the case of invalidated inodes as well as * those created by make_bad_inode() above. */ /** * is_bad_inode - is an inode errored * @inode: inode to test * * Returns true if the inode in question has been marked as bad. */ bool is_bad_inode(struct inode *inode){ return (inode->i_op == &bad_inode_ops); }
EXPORT_SYMBOL(is_bad_inode);
/** * iget_failed - Mark an under-construction inode as dead and release it * @inode: The inode to discard * * Mark an under-construction inode as dead and release it. */void iget_failed(struct inode *inode){ make_bad_inode(inode); unlock_new_inode(inode); iput(inode);}EXPORT_SYMBOL(iget_failed);