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/lustre_light.h>
40 extern int ll_setattr(struct dentry *de, struct iattr *attr);
41 void ll_change_inode(struct inode *inode);
43 static inline void ll_remove_suid(struct inode *inode)
47 /* set S_IGID if S_IXGRP is set, and always set S_ISUID */
48 mode = (inode->i_mode & S_IXGRP)*(S_ISGID/S_IXGRP) | S_ISUID;
50 /* was any of the uid bits set? */
51 mode &= inode->i_mode;
52 if (mode && !capable(CAP_FSETID)) {
53 inode->i_mode &= ~mode;
54 // XXX careful here - we cannot change the size
55 //ll_change_inode(inode);
60 * Write to a file (through the page cache).
63 ll_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
66 CDEBUG(D_INFO, "Writing inode %ld, %d bytes, offset %Ld\n",
67 file->f_dentry->d_inode->i_ino, count, *ppos);
69 retval = generic_file_write(file, buf, count, ppos);
70 CDEBUG(D_INFO, "Wrote %d\n", retval);
72 /* update mtime/ctime/atime here, NOT size */
75 attr.ia_valid = ATTR_MTIME | ATTR_CTIME | ATTR_ATIME;
76 attr.ia_mtime = attr.ia_ctime = attr.ia_atime =
78 ll_setattr(file->f_dentry, &attr);
85 /* XXX this does not need to do anything for data, it _does_ need to
87 int ll_fsync(struct file *file, struct dentry *dentry, int data)
92 struct file_operations ll_file_operations = {
93 read: generic_file_read,
95 mmap: generic_file_mmap,
100 struct inode_operations ll_file_inode_operations = {
101 truncate: ll_truncate,