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https://github.com/torvalds/linux
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cc0bad7552
cifs: add new cifs_iget function and convert unix codepath to use it In order to unify some codepaths, introduce a common cifs_fattr struct for storing inode attributes. The different codepaths (unix, legacy, normal, etc...) can fill out this struct with inode info. It can then be passed as an arg to a common set of routines to get and update inodes. Add a new cifs_iget function that uses iget5_locked to identify inodes. This will compare inodes based on the uniqueid value in a cifs_fattr struct. Rather than filling out an already-created inode, have cifs_get_inode_info_unix instead fill out cifs_fattr and hand that off to cifs_iget. cifs_iget can then properly look for hardlinked inodes. On the readdir side, add a new cifs_readdir_lookup function that spawns populated dentries. Redefine FILE_UNIX_INFO so that it's basically a FILE_UNIX_BASIC_INFO that has a few fields wrapped around it. This allows us to more easily use the same function for filling out the fattr as the non-readdir codepath. With this, we should then have proper hardlink detection and can eventually get rid of some nasty CIFS-specific hacks for handing them. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
118 lines
5 KiB
C
118 lines
5 KiB
C
/*
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* fs/cifs/cifsfs.h
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*
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* Copyright (c) International Business Machines Corp., 2002, 2007
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* Author(s): Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _CIFSFS_H
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#define _CIFSFS_H
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#define ROOT_I 2
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/*
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* ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down
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* so that it will fit.
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*/
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static inline ino_t
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cifs_uniqueid_to_ino_t(u64 fileid)
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{
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ino_t ino = (ino_t) fileid;
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if (sizeof(ino_t) < sizeof(u64))
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ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
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return ino;
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}
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extern struct file_system_type cifs_fs_type;
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extern const struct address_space_operations cifs_addr_ops;
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extern const struct address_space_operations cifs_addr_ops_smallbuf;
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/* Functions related to super block operations */
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/* extern const struct super_operations cifs_super_ops;*/
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extern void cifs_read_inode(struct inode *);
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/*extern void cifs_delete_inode(struct inode *);*/ /* BB not needed yet */
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/* extern void cifs_write_inode(struct inode *); */ /* BB not needed yet */
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/* Functions related to inodes */
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extern const struct inode_operations cifs_dir_inode_ops;
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extern struct inode *cifs_root_iget(struct super_block *, unsigned long);
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extern int cifs_create(struct inode *, struct dentry *, int,
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struct nameidata *);
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extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
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struct nameidata *);
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extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
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extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
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extern int cifs_mknod(struct inode *, struct dentry *, int, dev_t);
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extern int cifs_mkdir(struct inode *, struct dentry *, int);
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extern int cifs_rmdir(struct inode *, struct dentry *);
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extern int cifs_rename(struct inode *, struct dentry *, struct inode *,
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struct dentry *);
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extern int cifs_revalidate(struct dentry *);
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extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
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extern int cifs_setattr(struct dentry *, struct iattr *);
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extern const struct inode_operations cifs_file_inode_ops;
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extern const struct inode_operations cifs_symlink_inode_ops;
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extern struct inode_operations cifs_dfs_referral_inode_operations;
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/* Functions related to files and directories */
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extern const struct file_operations cifs_file_ops;
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extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */
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extern const struct file_operations cifs_file_nobrl_ops;
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extern const struct file_operations cifs_file_direct_nobrl_ops; /* no brlocks */
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extern int cifs_open(struct inode *inode, struct file *file);
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extern int cifs_close(struct inode *inode, struct file *file);
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extern int cifs_closedir(struct inode *inode, struct file *file);
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extern ssize_t cifs_user_read(struct file *file, char __user *read_data,
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size_t read_size, loff_t *poffset);
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extern ssize_t cifs_user_write(struct file *file, const char __user *write_data,
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size_t write_size, loff_t *poffset);
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extern int cifs_lock(struct file *, int, struct file_lock *);
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extern int cifs_fsync(struct file *, struct dentry *, int);
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extern int cifs_flush(struct file *, fl_owner_t id);
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extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
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extern const struct file_operations cifs_dir_ops;
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extern int cifs_dir_open(struct inode *inode, struct file *file);
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extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
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/* Functions related to dir entries */
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extern const struct dentry_operations cifs_dentry_ops;
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extern const struct dentry_operations cifs_ci_dentry_ops;
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/* Functions related to symlinks */
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extern void *cifs_follow_link(struct dentry *direntry, struct nameidata *nd);
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extern void cifs_put_link(struct dentry *direntry,
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struct nameidata *nd, void *);
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extern int cifs_readlink(struct dentry *direntry, char __user *buffer,
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int buflen);
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extern int cifs_symlink(struct inode *inode, struct dentry *direntry,
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const char *symname);
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extern int cifs_removexattr(struct dentry *, const char *);
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extern int cifs_setxattr(struct dentry *, const char *, const void *,
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size_t, int);
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extern ssize_t cifs_getxattr(struct dentry *, const char *, void *, size_t);
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extern ssize_t cifs_listxattr(struct dentry *, char *, size_t);
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extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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extern const struct export_operations cifs_export_ops;
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#endif /* EXPERIMENTAL */
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#define CIFS_VERSION "1.59"
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#endif /* _CIFSFS_H */
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