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24#include <linux/kernel.h>
25#include <linux/mm.h>
26#include <linux/fs.h>
27#include <linux/sched.h>
28#include <linux/file.h>
29#include <linux/ptrace.h>
30#include <linux/slab.h>
31#include <asm/errno.h>
32#include <asm/uaccess.h>
33
34int hpux_execve(struct pt_regs *regs)
35{
36 int error;
37 char *filename;
38
39 filename = getname((const char __user *) regs->gr[26]);
40 error = PTR_ERR(filename);
41 if (IS_ERR(filename))
42 goto out;
43
44 error = do_execve(filename,
45 (const char __user *const __user *) regs->gr[25],
46 (const char __user *const __user *) regs->gr[24],
47 regs);
48
49 putname(filename);
50
51out:
52 return error;
53}
54
55struct hpux_dirent {
56 loff_t d_off;
57 ino_t d_ino;
58 short d_reclen;
59 short d_namlen;
60 char d_name[1];
61};
62
63struct getdents_callback {
64 struct hpux_dirent __user *current_dir;
65 struct hpux_dirent __user *previous;
66 int count;
67 int error;
68};
69
70#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
71
72static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
73 u64 ino, unsigned d_type)
74{
75 struct hpux_dirent __user * dirent;
76 struct getdents_callback * buf = (struct getdents_callback *) __buf;
77 ino_t d_ino;
78 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 1, sizeof(long));
79
80 buf->error = -EINVAL;
81 if (reclen > buf->count)
82 return -EINVAL;
83 d_ino = ino;
84 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
85 buf->error = -EOVERFLOW;
86 return -EOVERFLOW;
87 }
88 dirent = buf->previous;
89 if (dirent)
90 if (put_user(offset, &dirent->d_off))
91 goto Efault;
92 dirent = buf->current_dir;
93 if (put_user(d_ino, &dirent->d_ino) ||
94 put_user(reclen, &dirent->d_reclen) ||
95 put_user(namlen, &dirent->d_namlen) ||
96 copy_to_user(dirent->d_name, name, namlen) ||
97 put_user(0, dirent->d_name + namlen))
98 goto Efault;
99 buf->previous = dirent;
100 buf->current_dir = (void __user *)dirent + reclen;
101 buf->count -= reclen;
102 return 0;
103Efault:
104 buf->error = -EFAULT;
105 return -EFAULT;
106}
107
108#undef NAME_OFFSET
109
110int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned int count)
111{
112 struct file * file;
113 struct hpux_dirent __user * lastdirent;
114 struct getdents_callback buf;
115 int error = -EBADF;
116
117 file = fget(fd);
118 if (!file)
119 goto out;
120
121 buf.current_dir = dirent;
122 buf.previous = NULL;
123 buf.count = count;
124 buf.error = 0;
125
126 error = vfs_readdir(file, filldir, &buf);
127 if (error >= 0)
128 error = buf.error;
129 lastdirent = buf.previous;
130 if (lastdirent) {
131 if (put_user(file->f_pos, &lastdirent->d_off))
132 error = -EFAULT;
133 else
134 error = count - buf.count;
135 }
136
137 fput(file);
138out:
139 return error;
140}
141
142int hpux_mount(const char *fs, const char *path, int mflag,
143 const char *fstype, const char *dataptr, int datalen)
144{
145 return -ENOSYS;
146}
147
148static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
149{
150 struct hpux_stat64 tmp;
151
152
153
154 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
155 return -EOVERFLOW;
156
157 memset(&tmp, 0, sizeof(tmp));
158 tmp.st_dev = new_encode_dev(stat->dev);
159 tmp.st_ino = stat->ino;
160 tmp.st_mode = stat->mode;
161 tmp.st_nlink = stat->nlink;
162 tmp.st_uid = stat->uid;
163 tmp.st_gid = stat->gid;
164 tmp.st_rdev = new_encode_dev(stat->rdev);
165 tmp.st_size = stat->size;
166 tmp.st_atime = stat->atime.tv_sec;
167 tmp.st_mtime = stat->mtime.tv_sec;
168 tmp.st_ctime = stat->ctime.tv_sec;
169 tmp.st_blocks = stat->blocks;
170 tmp.st_blksize = stat->blksize;
171 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
172}
173
174long hpux_stat64(const char __user *filename, struct hpux_stat64 __user *statbuf)
175{
176 struct kstat stat;
177 int error = vfs_stat(filename, &stat);
178
179 if (!error)
180 error = cp_hpux_stat(&stat, statbuf);
181
182 return error;
183}
184
185long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
186{
187 struct kstat stat;
188 int error = vfs_fstat(fd, &stat);
189
190 if (!error)
191 error = cp_hpux_stat(&stat, statbuf);
192
193 return error;
194}
195
196long hpux_lstat64(const char __user *filename,
197 struct hpux_stat64 __user *statbuf)
198{
199 struct kstat stat;
200 int error = vfs_lstat(filename, &stat);
201
202 if (!error)
203 error = cp_hpux_stat(&stat, statbuf);
204
205 return error;
206}
207
