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