/*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013-2018 Mellanox Technologies, Ltd. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _LINUX_FS_H_ #define _LINUX_FS_H_ #include #include #include #include #include #include #include #include #include #include #include #include struct module; struct kiocb; struct iovec; struct dentry; struct page; struct file_lock; struct pipe_inode_info; struct vm_area_struct; struct poll_table_struct; struct files_struct; struct pfs_node; struct linux_cdev; #define inode vnode #define i_cdev v_rdev #define i_private v_data #define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH) #define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH) typedef struct files_struct *fl_owner_t; struct file_operations; struct linux_file_wait_queue { struct wait_queue wq; struct wait_queue_head *wqh; atomic_t state; #define LINUX_FWQ_STATE_INIT 0 #define LINUX_FWQ_STATE_NOT_READY 1 #define LINUX_FWQ_STATE_QUEUED 2 #define LINUX_FWQ_STATE_READY 3 #define LINUX_FWQ_STATE_MAX 4 }; struct linux_file { struct file *_file; const struct file_operations *f_op; void *private_data; int f_flags; int f_mode; /* Just starting mode. */ struct dentry *f_dentry; struct dentry f_dentry_store; struct selinfo f_selinfo; struct sigio *f_sigio; struct vnode *f_vnode; #define f_inode f_vnode volatile u_int f_count; /* anonymous shmem object */ vm_object_t f_shmem; /* kqfilter support */ int f_kqflags; #define LINUX_KQ_FLAG_HAS_READ (1 << 0) #define LINUX_KQ_FLAG_HAS_WRITE (1 << 1) #define LINUX_KQ_FLAG_NEED_READ (1 << 2) #define LINUX_KQ_FLAG_NEED_WRITE (1 << 3) /* protects f_selinfo.si_note */ spinlock_t f_kqlock; struct linux_file_wait_queue f_wait_queue; /* pointer to associated character device, if any */ struct linux_cdev *f_cdev; }; #define file linux_file #define fasync_struct sigio * #define fasync_helper(fd, filp, on, queue) \ ({ \ if ((on)) \ *(queue) = &(filp)->f_sigio; \ else \ *(queue) = NULL; \ 0; \ }) #define kill_fasync(queue, sig, pollstat) \ do { \ if (*(queue) != NULL) \ pgsigio(*(queue), (sig), 0); \ } while (0) typedef int (*filldir_t)(void *, const char *, int, off_t, u64, unsigned); struct file_operations { struct module *owner; ssize_t (*read)(struct linux_file *, char __user *, size_t, off_t *); ssize_t (*write)(struct linux_file *, const char __user *, size_t, off_t *); unsigned int (*poll) (struct linux_file *, struct poll_table_struct *); long (*unlocked_ioctl)(struct linux_file *, unsigned int, unsigned long); long (*compat_ioctl)(struct linux_file *, unsigned int, unsigned long); int (*mmap)(struct linux_file *, struct vm_area_struct *); int (*open)(struct inode *, struct file *); int (*release)(struct inode *, struct linux_file *); int (*fasync)(int, struct linux_file *, int); /* Although not supported in FreeBSD, to align with Linux code * we are adding llseek() only when it is mapped to no_llseek which returns * an illegal seek error */ off_t (*llseek)(struct linux_file *, off_t, int); #if 0 /* We do not support these methods. Don't permit them to compile. */ loff_t (*llseek)(struct file *, loff_t, int); ssize_t (*aio_read)(struct kiocb *, const struct iovec *, unsigned long, loff_t); ssize_t (*aio_write)(struct kiocb *, const struct iovec *, unsigned long, loff_t); int (*readdir)(struct file *, void *, filldir_t); int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long); int (*flush)(struct file *, fl_owner_t id); int (*fsync)(struct file *, struct dentry *, int datasync); int (*aio_fsync)(struct kiocb *, int datasync); int (*lock)(struct file *, int, struct file_lock *); ssize_t (*sendpage)(struct file *, struct page *, int, size_t, loff_t *, int); unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long); int (*check_flags)(int); int (*flock)(struct file *, int, struct file_lock *); ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int); ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int); int (*setlease)(struct file *, long, struct file_lock **); #endif }; #define fops_get(fops) (fops) #define replace_fops(f, fops) ((f)->f_op = (fops)) #define FMODE_READ FREAD #define FMODE_WRITE FWRITE #define FMODE_EXEC FEXEC #define FMODE_UNSIGNED_OFFSET 0x2000 int __register_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char *name, const struct file_operations *fops); int __register_chrdev_p(unsigned int major, unsigned int baseminor, unsigned int count, const char *name, const struct file_operations *fops, uid_t uid, gid_t gid, int mode); void __unregister_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char *name); static inline void unregister_chrdev(unsigned int major, const char *name) { __unregister_chrdev(major, 0, 256, name); } static inline int register_chrdev(unsigned int major, const char *name, const struct file_operations *fops) { return (__register_chrdev(major, 0, 256, name, fops)); } static inline int register_chrdev_p(unsigned int major, const char *name, const struct file_operations *fops, uid_t uid, gid_t gid, int mode) { return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode)); } static inline int register_chrdev_region(dev_t dev, unsigned range, const char *name) { return 0; } static inline void unregister_chrdev_region(dev_t dev, unsigned range) { return; } static inline int alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, const char *name) { return 0; } /* No current support for seek op in FreeBSD */ static inline int nonseekable_open(struct inode *inode, struct file *filp) { return 0; } extern unsigned int linux_iminor(struct inode *); #define iminor(...) linux_iminor(__VA_ARGS__) static inline struct linux_file * get_file(struct linux_file *f) { refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count); return (f); } static inline struct inode * igrab(struct inode *inode) { int error; error = vget(inode, 0); if (error) return (NULL); return (inode); } static inline void iput(struct inode *inode) { vrele(inode); } static inline loff_t no_llseek(struct file *file, loff_t offset, int whence) { return (-ESPIPE); } static inline loff_t noop_llseek(struct linux_file *file, loff_t offset, int whence) { return (file->_file->f_offset); } static inline struct vnode * file_inode(const struct linux_file *file) { return (file->f_vnode); } static inline int call_mmap(struct linux_file *file, struct vm_area_struct *vma) { return (file->f_op->mmap(file, vma)); } #endif /* _LINUX_FS_H_ */