4 * This code is issued under the GNU General Public License.
5 * See the file COPYING in this distribution
7 * Copyright (C) 1992, 1993, 1994, 1995
8 * Remy Card (card@masi.ibp.fr)
9 * Laboratoire MASI - Institut Blaise Pascal
10 * Universite Pierre et Marie Curie (Paris VI)
14 * linux/fs/minix/file.c
16 * Copyright (C) 1991, 1992 Linus Torvalds
18 * ext2 fs regular file handling primitives
20 * 64-bit file support on 64-bit platforms by Jakub Jelinek
21 * (jj@sunsite.ms.mff.cuni.cz)
24 #include <asm/uaccess.h>
25 #include <asm/system.h>
27 #include <linux/errno.h>
29 #include <linux/fcntl.h>
30 #include <linux/sched.h>
31 #include <linux/stat.h>
32 #include <linux/locks.h>
34 #include <linux/pagemap.h>
35 #include <linux/smp_lock.h>
37 #include <linux/obd_support.h>
38 #include <linux/obdfs.h>
40 static inline void obdfs_remove_suid(struct inode *inode)
44 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
45 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
47 /* was any of the uid bits set? */
48 mode &= inode->i_mode;
49 if (mode && !capable(CAP_FSETID)) {
50 inode->i_mode &= ~mode;
51 mark_inode_dirty(inode);
56 * Write to a file (through the page cache).
59 obdfs_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
62 CDEBUG(D_INFO, "Writing inode %ld, %d bytes, offset %ld\n",
63 file->f_dentry->d_inode->i_ino, count, (long)*ppos);
65 retval = generic_file_write(file, buf, count, ppos);
66 CDEBUG(D_INFO, "Wrote %d\n", retval);
68 struct inode *inode = file->f_dentry->d_inode;
69 obdfs_remove_suid(inode);
70 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
71 mark_inode_dirty(inode);
77 struct file_operations obdfs_file_operations = {
78 read: generic_file_read, /* read */
79 write: obdfs_file_write, /* write */
80 mmap: generic_file_mmap, /* mmap */
83 extern int obdfs_notify_change(struct dentry *de, struct iattr *attr);
84 struct inode_operations obdfs_file_inode_operations = {
89 symlink: obdfs_symlink,
94 truncate: obdfs_truncate,
95 setattr: obdfs_notify_change