4 * Copyright (C) 1995, 1996 by Volker Lendecke
5 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
9 #include <asm/uaccess.h>
10 #include <asm/system.h>
12 #include <linux/time.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/fcntl.h>
16 #include <linux/stat.h>
18 #include <linux/slab.h>
19 #include <linux/vmalloc.h>
20 #include <linux/smp_lock.h>
22 #include <linux/ncp_fs.h>
23 #include "ncplib_kernel.h"
25 static int ncp_fsync(struct file *file, struct dentry *dentry, int datasync)
31 * Open a file with the specified read/write mode.
33 int ncp_make_open(struct inode *inode, int right)
40 printk(KERN_ERR "ncp_make_open: got NULL inode\n");
44 DPRINTK("ncp_make_open: opened=%d, volume # %u, dir entry # %u\n",
45 atomic_read(&NCP_FINFO(inode)->opened),
46 NCP_FINFO(inode)->volNumber,
47 NCP_FINFO(inode)->dirEntNum);
49 down(&NCP_FINFO(inode)->open_sem);
50 if (!atomic_read(&NCP_FINFO(inode)->opened)) {
51 struct ncp_entry_info finfo;
54 /* tries max. rights */
55 finfo.access = O_RDWR;
56 result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
57 inode, NULL, OC_MODE_OPEN,
58 0, AR_READ | AR_WRITE, &finfo);
61 /* RDWR did not succeeded, try readonly or writeonly as requested */
64 finfo.access = O_RDONLY;
65 result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
66 inode, NULL, OC_MODE_OPEN,
70 finfo.access = O_WRONLY;
71 result = ncp_open_create_file_or_subdir(NCP_SERVER(inode),
72 inode, NULL, OC_MODE_OPEN,
77 PPRINTK("ncp_make_open: failed, result=%d\n", result);
81 * Update the inode information.
84 ncp_update_inode(inode, &finfo);
85 atomic_set(&NCP_FINFO(inode)->opened, 1);
88 access = NCP_FINFO(inode)->access;
89 PPRINTK("ncp_make_open: file open, access=%x\n", access);
90 if (access == right || access == O_RDWR) {
91 atomic_inc(&NCP_FINFO(inode)->opened);
96 up(&NCP_FINFO(inode)->open_sem);
102 ncp_file_read(struct file *file, char *buf, size_t count, loff_t *ppos)
104 struct dentry *dentry = file->f_dentry;
105 struct inode *inode = dentry->d_inode;
106 size_t already_read = 0;
113 DPRINTK("ncp_file_read: enter %s/%s\n",
114 dentry->d_parent->d_name.name, dentry->d_name.name);
116 if (!ncp_conn_valid(NCP_SERVER(inode)))
118 if (!S_ISREG(inode->i_mode)) {
119 DPRINTK("ncp_file_read: read from non-file, mode %07o\n",
126 if ((ssize_t) count < 0) {
131 if (pos > inode->i_sb->s_maxbytes)
133 if (pos + count > inode->i_sb->s_maxbytes) {
134 count = inode->i_sb->s_maxbytes - pos;
137 error = ncp_make_open(inode, O_RDONLY);
139 DPRINTK(KERN_ERR "ncp_file_read: open failed, error=%d\n", error);
143 bufsize = NCP_SERVER(inode)->buffer_size;
146 freelen = ncp_read_bounce_size(bufsize);
147 freepage = vmalloc(freelen);
151 /* First read in as much as possible for each bufsize. */
152 while (already_read < count) {
154 size_t to_read = min_t(unsigned int,
155 bufsize - (pos % bufsize),
156 count - already_read);
158 error = ncp_read_bounce(NCP_SERVER(inode),
159 NCP_FINFO(inode)->file_handle,
160 pos, to_read, buf, &read_this_time,
163 error = -EIO; /* NW errno -> Linux errno */
166 pos += read_this_time;
167 buf += read_this_time;
168 already_read += read_this_time;
170 if (read_this_time != to_read) {
178 if (!IS_RDONLY(inode)) {
179 inode->i_atime = CURRENT_TIME;
182 DPRINTK("ncp_file_read: exit %s/%s\n",
183 dentry->d_parent->d_name.name, dentry->d_name.name);
185 ncp_inode_close(inode);
186 return already_read ? already_read : error;
190 ncp_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
192 struct dentry *dentry = file->f_dentry;
193 struct inode *inode = dentry->d_inode;
194 size_t already_written = 0;
200 DPRINTK("ncp_file_write: enter %s/%s\n",
201 dentry->d_parent->d_name.name, dentry->d_name.name);
202 if (!ncp_conn_valid(NCP_SERVER(inode)))
204 if (!S_ISREG(inode->i_mode)) {
205 DPRINTK("ncp_file_write: write to non-file, mode %07o\n",
209 if ((ssize_t) count < 0)
212 if (file->f_flags & O_APPEND) {
216 if (pos + count > MAX_NON_LFS && !(file->f_flags&O_LARGEFILE)) {
217 if (pos >= MAX_NON_LFS) {
218 send_sig(SIGXFSZ, current, 0);
221 if (count > MAX_NON_LFS - (u32)pos) {
222 count = MAX_NON_LFS - (u32)pos;
225 if (pos >= inode->i_sb->s_maxbytes) {
226 if (count || pos > inode->i_sb->s_maxbytes) {
227 send_sig(SIGXFSZ, current, 0);
231 if (pos + count > inode->i_sb->s_maxbytes) {
232 count = inode->i_sb->s_maxbytes - pos;
237 errno = ncp_make_open(inode, O_WRONLY);
239 DPRINTK(KERN_ERR "ncp_file_write: open failed, error=%d\n", errno);
242 bufsize = NCP_SERVER(inode)->buffer_size;
246 bouncebuffer = vmalloc(bufsize);
248 errno = -EIO; /* -ENOMEM */
251 while (already_written < count) {
252 int written_this_time;
253 size_t to_write = min_t(unsigned int,
254 bufsize - (pos % bufsize),
255 count - already_written);
257 if (copy_from_user(bouncebuffer, buf, to_write)) {
261 if (ncp_write_kernel(NCP_SERVER(inode),
262 NCP_FINFO(inode)->file_handle,
263 pos, to_write, bouncebuffer, &written_this_time) != 0) {
267 pos += written_this_time;
268 buf += written_this_time;
269 already_written += written_this_time;
271 if (written_this_time != to_write) {
276 inode->i_mtime = inode->i_atime = CURRENT_TIME;
280 if (pos > inode->i_size) {
283 DPRINTK("ncp_file_write: exit %s/%s\n",
284 dentry->d_parent->d_name.name, dentry->d_name.name);
286 ncp_inode_close(inode);
287 return already_written ? already_written : errno;
290 static int ncp_release(struct inode *inode, struct file *file) {
291 if (ncp_make_closed(inode)) {
292 DPRINTK("ncp_release: failed to close\n");
297 struct file_operations ncp_file_operations =
299 .llseek = remote_llseek,
300 .read = ncp_file_read,
301 .write = ncp_file_write,
304 .release = ncp_release,
308 struct inode_operations ncp_file_inode_operations =
310 .setattr = ncp_notify_change,