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hostfs: get rid of file_type(), fold init_inode()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2010-06-06 20:33:12 -04:00
parent 39b743c619
commit 4754b82557
3 changed files with 47 additions and 95 deletions
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1
fs/hostfs/hostfs.h
View file

@ -70,7 +70,6 @@ struct hostfs_stat {
extern int stat_file(const char *path, struct hostfs_stat *p, int fd);
extern int access_file(char *path, int r, int w, int x);
extern int open_file(char *path, int r, int w, int append);
extern int file_type(const char *path, int *maj, int *min);
extern void *open_dir(char *path, int *err_out);
extern char *read_dir(void *stream, unsigned long long *pos,
unsigned long long *ino_out, int *len_out);

111
fs/hostfs/hostfs_kern.c
View file

@ -129,26 +129,6 @@ static char *inode_name(struct inode *ino, int extra)
return dentry_name(dentry, extra);
}
static int read_name(struct inode *ino, char *name)
{
struct hostfs_stat st;
int err = stat_file(name, &st, -1);
if (err)
return err;
ino->i_ino = st.ino;
ino->i_mode = st.mode;
ino->i_nlink = st.nlink;
ino->i_uid = st.uid;
ino->i_gid = st.gid;
ino->i_atime = st.atime;
ino->i_mtime = st.mtime;
ino->i_ctime = st.ctime;
ino->i_size = st.size;
ino->i_blocks = st.blocks;
return 0;
}
static char *follow_link(char *link)
{
int len, n;
@ -478,43 +458,51 @@ static const struct address_space_operations hostfs_aops = {
.write_end = hostfs_write_end,
};
static void init_inode(struct inode *inode, char *path)
static int read_name(struct inode *ino, char *name)
{
int type;
int maj, min;
dev_t rdev = 0;
dev_t rdev;
struct hostfs_stat st;
int err = stat_file(name, &st, -1);
if (err)
return err;
type = file_type(path, &maj, &min);
/* Reencode maj and min with the kernel encoding.*/
rdev = MKDEV(maj, min);
rdev = MKDEV(st.maj, st.min);
if (type == OS_TYPE_SYMLINK)
inode->i_op = &page_symlink_inode_operations;
else if (type == OS_TYPE_DIR)
inode->i_op = &hostfs_dir_iops;
else inode->i_op = &hostfs_iops;
switch (st.mode & S_IFMT) {
case S_IFLNK:
ino->i_op = &page_symlink_inode_operations;
ino->i_mapping->a_ops = &hostfs_link_aops;
break;
case S_IFDIR:
ino->i_op = &hostfs_dir_iops;
ino->i_fop = &hostfs_dir_fops;
break;
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
case S_IFSOCK:
init_special_inode(ino, st.mode & S_IFMT, rdev);
ino->i_op = &hostfs_iops;
break;
if (type == OS_TYPE_DIR) inode->i_fop = &hostfs_dir_fops;
else inode->i_fop = &hostfs_file_fops;
if (type == OS_TYPE_SYMLINK)
inode->i_mapping->a_ops = &hostfs_link_aops;
else inode->i_mapping->a_ops = &hostfs_aops;
switch (type) {
case OS_TYPE_CHARDEV:
init_special_inode(inode, S_IFCHR, rdev);
break;
case OS_TYPE_BLOCKDEV:
init_special_inode(inode, S_IFBLK, rdev);
break;
case OS_TYPE_FIFO:
init_special_inode(inode, S_IFIFO, 0);
break;
case OS_TYPE_SOCK:
init_special_inode(inode, S_IFSOCK, 0);
break;
default:
ino->i_op = &hostfs_iops;
ino->i_fop = &hostfs_file_fops;
ino->i_mapping->a_ops = &hostfs_aops;
}
ino->i_ino = st.ino;
ino->i_mode = st.mode;
ino->i_nlink = st.nlink;
ino->i_uid = st.uid;
ino->i_gid = st.gid;
ino->i_atime = st.atime;
ino->i_mtime = st.mtime;
ino->i_ctime = st.ctime;
ino->i_size = st.size;
ino->i_blocks = st.blocks;
return 0;
}
int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
@ -539,12 +527,10 @@ int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
mode & S_IRUSR, mode & S_IWUSR, mode & S_IXUSR,
mode & S_IRGRP, mode & S_IWGRP, mode & S_IXGRP,
mode & S_IROTH, mode & S_IWOTH, mode & S_IXOTH);
if (fd < 0) {
if (fd < 0)
error = fd;
} else {
else
error = read_name(inode, name);
init_inode(inode, name);
}
kfree(name);
if (error)
@ -580,7 +566,6 @@ struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
goto out_put;
err = read_name(inode, name);
init_inode(inode, name);
kfree(name);
if (err == -ENOENT) {
@ -707,7 +692,6 @@ int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
goto out_free;
err = read_name(inode, name);
init_inode(inode, name);
if (err)
goto out_put;
kfree(name);
@ -922,21 +906,20 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
if (!root_inode)
goto out;
root_inode->i_op = &hostfs_dir_iops;
root_inode->i_fop = &hostfs_dir_fops;
err = read_name(root_inode, host_root_path);
if (err)
goto out_put;
if (file_type(host_root_path, NULL, NULL) == OS_TYPE_SYMLINK) {
if (S_ISLNK(root_inode->i_mode)) {
char *name = follow_link(host_root_path);
if (IS_ERR(name))
err = PTR_ERR(name);
else
err = read_name(root_inode, name);
kfree(name);
} else {
err = read_name(root_inode, host_root_path);
if (err)
goto out_put;
}
if (err)
goto out_put;
err = -ENOMEM;
sb->s_root = d_alloc_root(root_inode);

30
fs/hostfs/hostfs_user.c
View file

@ -53,36 +53,6 @@ int stat_file(const char *path, struct hostfs_stat *p, int fd)
return 0;
}
int file_type(const char *path, int *maj, int *min)
{
struct stat64 buf;
if (lstat64(path, &buf) < 0)
return -errno;
/*
* We cannot pass rdev as is because glibc and the kernel disagree
* about its definition.
*/
if (maj != NULL)
*maj = os_major(buf.st_rdev);
if (min != NULL)
*min = os_minor(buf.st_rdev);
if (S_ISDIR(buf.st_mode))
return OS_TYPE_DIR;
else if (S_ISLNK(buf.st_mode))
return OS_TYPE_SYMLINK;
else if (S_ISCHR(buf.st_mode))
return OS_TYPE_CHARDEV;
else if (S_ISBLK(buf.st_mode))
return OS_TYPE_BLOCKDEV;
else if (S_ISFIFO(buf.st_mode))
return OS_TYPE_FIFO;
else if (S_ISSOCK(buf.st_mode))
return OS_TYPE_SOCK;
else return OS_TYPE_FILE;
}
int access_file(char *path, int r, int w, int x)
{
int mode = 0;