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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 struct filename *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->name,
45 (const char __user *const __user *) regs->gr[25],
46 (const char __user *const __user *) regs->gr[24]);
47
48 putname(filename);
49
50out:
51 return error;
52}
53
54struct hpux_dirent {
55 loff_t d_off;
56 ino_t d_ino;
57 short d_reclen;
58 short d_namlen;
59 char d_name[1];
60};
61
62struct getdents_callback {
63 struct dir_context ctx;
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 fd arg;
113 struct hpux_dirent __user * lastdirent;
114 struct getdents_callback buf = {
115 .ctx.actor = filldir,
116 .current_dir = dirent,
117 .count = count
118 };
119 int error;
120
121 arg = fdget(fd);
122 if (!arg.file)
123 return -EBADF;
124
125 error = iterate_dir(arg.file, &buf.ctx);
126 if (error >= 0)
127 error = buf.error;
128 lastdirent = buf.previous;
129 if (lastdirent) {
130 if (put_user(buf.ctx.pos, &lastdirent->d_off))
131 error = -EFAULT;
132 else
133 error = count - buf.count;
134 }
135
136 fdput(arg);
137 return error;
138}
139
140int hpux_mount(const char *fs, const char *path, int mflag,
141 const char *fstype, const char *dataptr, int datalen)
142{
143 return -ENOSYS;
144}
145
146static int cp_hpux_stat(struct kstat *stat, struct hpux_stat64 __user *statbuf)
147{
148 struct hpux_stat64 tmp;
149
150
151
152 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
153 return -EOVERFLOW;
154
155 memset(&tmp, 0, sizeof(tmp));
156 tmp.st_dev = new_encode_dev(stat->dev);
157 tmp.st_ino = stat->ino;
158 tmp.st_mode = stat->mode;
159 tmp.st_nlink = stat->nlink;
160 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid);
161 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid);
162 tmp.st_rdev = new_encode_dev(stat->rdev);
163 tmp.st_size = stat->size;
164 tmp.st_atime = stat->atime.tv_sec;
165 tmp.st_mtime = stat->mtime.tv_sec;
166 tmp.st_ctime = stat->ctime.tv_sec;
167 tmp.st_blocks = stat->blocks;
168 tmp.st_blksize = stat->blksize;
169 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
170}
171
172long hpux_stat64(const char __user *filename, struct hpux_stat64 __user *statbuf)
173{
174 struct kstat stat;
175 int error = vfs_stat(filename, &stat);
176
177 if (!error)
178 error = cp_hpux_stat(&stat, statbuf);
179
180 return error;
181}
182
183long hpux_fstat64(unsigned int fd, struct hpux_stat64 __user *statbuf)
184{
185 struct kstat stat;
186 int error = vfs_fstat(fd, &stat);
187
188 if (!error)
189 error = cp_hpux_stat(&stat, statbuf);
190
191 return error;
192}
193
194long hpux_lstat64(const char __user *filename,
195 struct hpux_stat64 __user *statbuf)
196{
197 struct kstat stat;
198 int error = vfs_lstat(filename, &stat);
199
200 if (!error)
201 error = cp_hpux_stat(&stat, statbuf);
202
203 return error;
204}
205
