4 * Copyright (C) 1991, 1992 Linus Torvalds
7 #include <linux/config.h>
9 #include <linux/errno.h>
10 #include <linux/file.h>
11 #include <linux/smp_lock.h>
12 #include <linux/highuid.h>
14 #include <linux/namei.h>
16 #include <asm/uaccess.h>
18 void generic_fillattr(struct inode *inode, struct kstat *stat)
20 stat->dev = kdev_t_to_nr(inode->i_dev);
21 stat->ino = inode->i_ino;
22 stat->mode = inode->i_mode;
23 stat->nlink = inode->i_nlink;
24 stat->uid = inode->i_uid;
25 stat->gid = inode->i_gid;
26 stat->rdev = kdev_t_to_nr(inode->i_rdev);
27 stat->atime = inode->i_atime;
28 stat->mtime = inode->i_mtime;
29 stat->ctime = inode->i_ctime;
30 stat->ctime = inode->i_ctime;
31 stat->size = inode->i_size;
32 stat->blocks = inode->i_blocks;
33 stat->blksize = inode->i_blksize;
36 static int do_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
38 struct inode *inode = dentry->d_inode;
40 if (inode->i_op->getattr)
41 return inode->i_op->getattr(mnt, dentry, stat);
43 generic_fillattr(inode, stat);
45 struct super_block *s = inode->i_sb;
47 blocks = (stat->size+s->s_blocksize-1) >> s->s_blocksize_bits;
48 stat->blocks = (s->s_blocksize / 512) * blocks;
49 stat->blksize = s->s_blocksize;
54 int vfs_stat(char *name, struct kstat *stat)
59 error = user_path_walk(name, &nd);
61 error = do_getattr(nd.mnt, nd.dentry, stat);
67 int vfs_lstat(char *name, struct kstat *stat)
72 error = user_path_walk_link(name, &nd);
74 error = do_getattr(nd.mnt, nd.dentry, stat);
80 int vfs_fstat(unsigned int fd, struct kstat *stat)
82 struct file *f = fget(fd);
86 error = do_getattr(f->f_vfsmnt, f->f_dentry, stat);
92 #if !defined(__alpha__) && !defined(__sparc__) && !defined(__ia64__) \
93 && !defined(CONFIG_ARCH_S390) && !defined(__hppa__) && !defined(__x86_64__) \
97 * For backward compatibility? Maybe this should be moved
98 * into arch/i386 instead?
100 static int cp_old_stat(struct kstat *stat, struct __old_kernel_stat * statbuf)
102 static int warncount = 5;
103 struct __old_kernel_stat tmp;
107 printk(KERN_WARNING "VFS: Warning: %s using old stat() call. Recompile your binary.\n",
109 } else if (warncount < 0) {
110 /* it's laughable, but... */
114 tmp.st_dev = stat->dev;
115 tmp.st_ino = stat->ino;
116 tmp.st_mode = stat->mode;
117 tmp.st_nlink = stat->nlink;
118 SET_OLDSTAT_UID(tmp, stat->uid);
119 SET_OLDSTAT_GID(tmp, stat->gid);
120 tmp.st_rdev = stat->rdev;
121 #if BITS_PER_LONG == 32
122 if (stat->size > MAX_NON_LFS)
125 tmp.st_size = stat->size;
126 tmp.st_atime = stat->atime;
127 tmp.st_mtime = stat->mtime;
128 tmp.st_ctime = stat->ctime;
129 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
132 asmlinkage long sys_stat(char * filename, struct __old_kernel_stat * statbuf)
135 int error = vfs_stat(filename, &stat);
138 error = cp_old_stat(&stat, statbuf);
142 asmlinkage long sys_lstat(char * filename, struct __old_kernel_stat * statbuf)
145 int error = vfs_lstat(filename, &stat);
148 error = cp_old_stat(&stat, statbuf);
152 asmlinkage long sys_fstat(unsigned int fd, struct __old_kernel_stat * statbuf)
155 int error = vfs_fstat(fd, &stat);
158 error = cp_old_stat(&stat, statbuf);
165 static int cp_new_stat(struct kstat *stat, struct stat *statbuf)
169 memset(&tmp, 0, sizeof(tmp));
170 tmp.st_dev = stat->dev;
171 tmp.st_ino = stat->ino;
172 tmp.st_mode = stat->mode;
173 tmp.st_nlink = stat->nlink;
174 SET_STAT_UID(tmp, stat->uid);
175 SET_STAT_GID(tmp, stat->gid);
176 tmp.st_rdev = stat->rdev;
177 #if BITS_PER_LONG == 32
178 if (stat->size > MAX_NON_LFS)
181 tmp.st_size = stat->size;
182 tmp.st_atime = stat->atime;
183 tmp.st_mtime = stat->mtime;
184 tmp.st_ctime = stat->ctime;
185 tmp.st_blocks = stat->blocks;
186 tmp.st_blksize = stat->blksize;
187 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
190 asmlinkage long sys_newstat(char * filename, struct stat * statbuf)
193 int error = vfs_stat(filename, &stat);
196 error = cp_new_stat(&stat, statbuf);
200 asmlinkage long sys_newlstat(char * filename, struct stat * statbuf)
203 int error = vfs_lstat(filename, &stat);
206 error = cp_new_stat(&stat, statbuf);
210 asmlinkage long sys_newfstat(unsigned int fd, struct stat * statbuf)
213 int error = vfs_fstat(fd, &stat);
216 error = cp_new_stat(&stat, statbuf);
221 asmlinkage long sys_readlink(const char * path, char * buf, int bufsiz)
229 error = user_path_walk_link(path, &nd);
231 struct inode * inode = nd.dentry->d_inode;
234 if (inode->i_op && inode->i_op->readlink) {
236 error = inode->i_op->readlink(nd.dentry, buf, bufsiz);
244 /* ---------- LFS-64 ----------- */
245 #if !defined(__alpha__) && !defined(__ia64__) && !defined(__mips64) && !defined(__x86_64__) && !defined(CONFIG_ARCH_S390X)
247 static long cp_new_stat64(struct kstat *stat, struct stat64 *statbuf)
251 memset(&tmp, 0, sizeof(tmp));
252 tmp.st_dev = stat->dev;
253 tmp.st_ino = stat->ino;
254 #ifdef STAT64_HAS_BROKEN_ST_INO
255 tmp.__st_ino = stat->ino;
257 tmp.st_mode = stat->mode;
258 tmp.st_nlink = stat->nlink;
259 tmp.st_uid = stat->uid;
260 tmp.st_gid = stat->gid;
261 tmp.st_rdev = stat->rdev;
262 tmp.st_atime = stat->atime;
263 tmp.st_mtime = stat->mtime;
264 tmp.st_ctime = stat->ctime;
265 tmp.st_size = stat->size;
266 tmp.st_blocks = stat->blocks;
267 tmp.st_blksize = stat->blksize;
268 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
271 asmlinkage long sys_stat64(char * filename, struct stat64 * statbuf, long flags)
274 int error = vfs_stat(filename, &stat);
277 error = cp_new_stat64(&stat, statbuf);
281 asmlinkage long sys_lstat64(char * filename, struct stat64 * statbuf, long flags)
284 int error = vfs_lstat(filename, &stat);
287 error = cp_new_stat64(&stat, statbuf);
291 asmlinkage long sys_fstat64(unsigned long fd, struct stat64 * statbuf, long flags)
294 int error = vfs_fstat(fd, &stat);
297 error = cp_new_stat64(&stat, statbuf);