mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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13a6e42af8
Some applications/subsystems require mandatory byte range locks (as is used for Windows/DOS/OS2 etc). Sending advisory (posix style) byte range lock requests (instead of mandatory byte range locks) can lead to problems for these applications (which expect that other clients be prevented from writing to portions of the file which they have locked and are updating). This mount option allows mounting cifs with the new mount option "forcemand" (or "forcemandatorylock") in order to have the cifs client use mandatory byte range locks (ie SMB/CIFS/Windows/NTFS style locks) rather than posix byte range lock requests, even if the server would support posix byte range lock requests. This has no effect if the server does not support the CIFS Unix Extensions (since posix style locks require support for the CIFS Unix Extensions), but for mounts to Samba servers this can be helpful for Wine and applications that require mandatory byte range locks. Acked-by: Jeff Layton <jlayton@redhat.com> CC: Alexander Bokovoy <ab@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
105 lines
4.8 KiB
C
105 lines
4.8 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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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_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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extern int cifs_dir_notify(struct file *, unsigned long arg);
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/* Functions related to dir entries */
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extern struct dentry_operations cifs_dentry_ops;
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extern 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 "1.5666666"
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#endif /* _CIFSFS_H */
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