2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2015 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef _LINUX_FILE_H_
32 #define _LINUX_FILE_H_
34 #include <sys/param.h>
36 #include <sys/filedesc.h>
37 #include <sys/refcount.h>
38 #include <sys/capsicum.h>
42 #include <linux/slab.h>
48 extern struct fileops linuxfileops;
50 static inline struct linux_file *
51 linux_fget(unsigned int fd)
56 if (fget_unlocked(curthread->td_proc->p_fd, fd,
57 cap_rights_init(&rights), &file, NULL) != 0) {
60 return (struct linux_file *)file->f_data;
64 fput(struct linux_file *filp)
66 if (filp->_file == NULL) {
70 if (refcount_release(&filp->_file->f_count)) {
71 _fdrop(filp->_file, curthread);
77 put_unused_fd(unsigned int fd)
82 if (fget_unlocked(curthread->td_proc->p_fd, fd,
83 cap_rights_init(&rights), &file, NULL) != 0) {
87 * NOTE: We should only get here when the "fd" has not been
88 * installed, so no need to free the associated Linux file
91 fdclose(curthread, file, fd);
93 /* drop extra reference */
94 fdrop(file, curthread);
98 fd_install(unsigned int fd, struct linux_file *filp)
103 if (fget_unlocked(curthread->td_proc->p_fd, fd,
104 cap_rights_init(&rights), &file, NULL) != 0) {
108 finit(file, filp->f_mode, DTYPE_DEV, filp, &linuxfileops);
111 /* drop the extra reference */
122 error = falloc(curthread, &file, &fd, 0);
125 /* drop the extra reference */
126 fdrop(file, curthread);
131 get_unused_fd_flags(int flags)
137 error = falloc(curthread, &file, &fd, flags);
140 /* drop the extra reference */
141 fdrop(file, curthread);
145 static inline struct linux_file *
146 alloc_file(int mode, const struct file_operations *fops)
148 struct linux_file *filp;
150 filp = kzalloc(sizeof(*filp), GFP_KERNEL);
160 struct linux_file *linux_file;
163 static inline void fdput(struct fd fd)
168 static inline struct fd fdget(unsigned int fd)
170 struct linux_file *f = linux_fget(fd);
171 return (struct fd){f};
174 #define file linux_file
175 #define fget linux_fget
177 #endif /* _LINUX_FILE_H_ */