4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/file.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * ext2 fs regular file handling primitives
17 * 64-bit file support on 64-bit platforms by Jakub Jelinek
18 * (jj@sunsite.ms.mff.cuni.cz)
21 #include <asm/uaccess.h>
22 #include <asm/system.h>
24 #include <linux/errno.h>
26 #include <linux/fcntl.h>
27 #include <linux/sched.h>
28 #include <linux/stat.h>
29 #include <linux/locks.h>
31 #include <linux/pagemap.h>
32 #include <linux/smp_lock.h>
34 #include <linux/obd_support.h>
35 #include <linux/obdfs.h>
37 static inline void remove_suid(struct inode *inode)
41 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
42 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
44 /* was any of the uid bits set? */
45 mode &= inode->i_mode;
46 if (mode && !capable(CAP_FSETID)) {
47 inode->i_mode &= ~mode;
48 mark_inode_dirty(inode);
53 * Write to a file (through the page cache).
56 obdfs_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
59 CDEBUG(D_INFO, "Writing inode %ld, %d bytes, offset %ld\n",
60 file->f_dentry->d_inode->i_ino, count, (long)*ppos);
62 retval = generic_file_write(file, buf, count, ppos);
63 CDEBUG(D_INFO, "Wrote %d\n", retval);
65 struct inode *inode = file->f_dentry->d_inode;
67 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
68 mark_inode_dirty(inode);
74 struct file_operations obdfs_file_operations = {
75 read: generic_file_read, /* read */
76 write: obdfs_file_write, /* write */
77 mmap: generic_file_mmap, /* mmap */
80 extern int obdfs_notify_change(struct dentry *de, struct iattr *attr);
81 struct inode_operations obdfs_file_inode_operations = {
86 symlink: obdfs_symlink,
91 truncate: obdfs_truncate,
92 setattr: obdfs_notify_change