blob: aa3129538fe72a5f75f8e59426b87b44fd088db2 [file] [log] [blame]
/*
FUSE: Filesystem in Userspace
Copyright (C) 2001 Miklos Szeredi (mszeredi@inf.bme.hu)
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
#include "fuse_i.h"
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/file.h>
static struct inode_operations fuse_dir_inode_operations;
static struct inode_operations fuse_file_inode_operations;
static struct inode_operations fuse_symlink_inode_operations;
static struct file_operations fuse_dir_operations;
static struct dentry_operations fuse_dentry_operations;
#ifndef KERNEL_2_6
#define new_decode_dev(x) (x)
#define new_encode_dev(x) (x)
#endif
static void change_attributes(struct inode *inode, struct fuse_attr *attr)
{
if (S_ISREG(inode->i_mode) && i_size_read(inode) != attr->size) {
#ifdef KERNEL_2_6
invalidate_inode_pages(inode->i_mapping);
#else
invalidate_inode_pages(inode);
#endif
}
inode->i_mode = (inode->i_mode & S_IFMT) + (attr->mode & 07777);
inode->i_nlink = attr->nlink;
inode->i_uid = attr->uid;
inode->i_gid = attr->gid;
i_size_write(inode, attr->size);
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_blocks = attr->blocks;
#ifdef KERNEL_2_6
inode->i_atime.tv_sec = attr->atime;
inode->i_atime.tv_nsec = attr->atimensec;
inode->i_mtime.tv_sec = attr->mtime;
inode->i_mtime.tv_nsec = attr->mtimensec;
inode->i_ctime.tv_sec = attr->ctime;
inode->i_ctime.tv_nsec = attr->ctimensec;
#else
inode->i_atime = attr->atime;
inode->i_mtime = attr->mtime;
inode->i_ctime = attr->ctime;
#endif
}
static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr)
{
inode->i_mode = attr->mode & S_IFMT;
i_size_write(inode, attr->size);
if (S_ISREG(inode->i_mode)) {
inode->i_op = &fuse_file_inode_operations;
fuse_init_file_inode(inode);
}
else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &fuse_dir_inode_operations;
inode->i_fop = &fuse_dir_operations;
}
else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &fuse_symlink_inode_operations;
}
else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)){
inode->i_op = &fuse_file_inode_operations;
init_special_inode(inode, inode->i_mode,
new_decode_dev(attr->rdev));
} else
printk("fuse_init_inode: bad file type: %o\n", inode->i_mode);
}
struct inode *fuse_iget(struct super_block *sb, ino_t ino, int generation,
struct fuse_attr *attr, int version)
{
struct inode *inode;
inode = iget(sb, ino);
if (inode) {
if (!inode->u.generic_ip) {
struct fuse_req *req = fuse_request_alloc();
if (!req) {
iput(inode);
inode = NULL;
goto out;
}
inode->u.generic_ip = req;
inode->i_generation = generation;
fuse_init_inode(inode, attr);
} else if (inode->i_generation != generation)
printk("fuse_iget: bad generation for ino %lu\n", ino);
change_attributes(inode, attr);
inode->i_version = version;
}
out:
return inode;
}
static int fuse_send_lookup(struct fuse_conn *fc, struct fuse_req *req,
struct inode *dir, struct dentry *entry,
struct fuse_entry_out *outarg, int *version)
{
req->in.h.opcode = FUSE_LOOKUP;
req->in.h.ino = dir->i_ino;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
req->out.numargs = 1;
req->out.args[0].size = sizeof(struct fuse_entry_out);
req->out.args[0].value = outarg;
request_send(fc, req);
*version = req->out.h.unique;
return req->out.h.error;
}
static int fuse_do_lookup(struct inode *dir, struct dentry *entry,
struct fuse_entry_out *outarg, int *version)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req;
int err;
if (entry->d_name.len > FUSE_NAME_MAX)
return -ENAMETOOLONG;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
err = fuse_send_lookup(fc, req, dir, entry, outarg, version);
fuse_put_request(fc, req);
return err;
}
static inline unsigned long time_to_jiffies(unsigned long sec,
unsigned long nsec)
{
/* prevent wrapping of jiffies */
if (sec + 1 >= LONG_MAX / HZ)
return 0;
return jiffies + sec * HZ + nsec / (1000000000 / HZ);
}
static int fuse_lookup_iget(struct inode *dir, struct dentry *entry,
struct inode **inodep)
{
struct fuse_conn *fc = INO_FC(dir);
int err;
struct fuse_entry_out outarg;
int version;
struct inode *inode = NULL;
struct fuse_req *req;
if (entry->d_name.len > FUSE_NAME_MAX)
return -ENAMETOOLONG;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
err = fuse_send_lookup(fc, req, dir, entry, &outarg, &version);
if (!err) {
inode = fuse_iget(dir->i_sb, outarg.ino, outarg.generation,
&outarg.attr, version);
if (!inode) {
fuse_send_forget(fc, req, outarg.ino, version);
return -ENOMEM;
}
}
fuse_put_request(fc, req);
if (err && err != -ENOENT)
return err;
if (inode)
entry->d_time = time_to_jiffies(outarg.entry_valid,
outarg.entry_valid_nsec);
entry->d_op = &fuse_dentry_operations;
*inodep = inode;
return 0;
}
static int lookup_new_entry(struct fuse_conn *fc, struct fuse_req *req,
struct inode *dir, struct dentry *entry,
struct fuse_entry_out *outarg, int version,
int mode)
{
struct inode *inode;
inode = fuse_iget(dir->i_sb, outarg->ino, outarg->generation,
&outarg->attr, version);
if (!inode) {
fuse_send_forget(fc, req, outarg->ino, version);
return -ENOMEM;
}
fuse_put_request(fc, req);
/* Don't allow userspace to do really stupid things... */
if ((inode->i_mode ^ mode) & S_IFMT) {
iput(inode);
printk("fuse_mknod: inode has wrong type\n");
return -EINVAL;
}
entry->d_time = time_to_jiffies(outarg->entry_valid,
outarg->entry_valid_nsec);
d_instantiate(entry, inode);
return 0;
}
static int _fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
dev_t rdev)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_mknod_in inarg;
struct fuse_entry_out outarg;
int err;
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.mode = mode;
inarg.rdev = new_encode_dev(rdev);
req->in.h.opcode = FUSE_MKNOD;
req->in.h.ino = dir->i_ino;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = entry->d_name.len + 1;
req->in.args[1].value = entry->d_name.name;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
err = lookup_new_entry(fc, req, dir, entry, &outarg,
req->out.h.unique, mode);
else
fuse_put_request(fc, req);
return err;
}
static int _fuse_create(struct inode *dir, struct dentry *entry, int mode)
{
return _fuse_mknod(dir, entry, mode, 0);
}
static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_mkdir_in inarg;
struct fuse_entry_out outarg;
int err;
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.mode = mode;
req->in.h.opcode = FUSE_MKDIR;
req->in.h.ino = dir->i_ino;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = entry->d_name.len + 1;
req->in.args[1].value = entry->d_name.name;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
err = lookup_new_entry(fc, req, dir, entry, &outarg,
req->out.h.unique, S_IFDIR);
else
fuse_put_request(fc, req);
return err;
}
static int fuse_symlink(struct inode *dir, struct dentry *entry,
const char *link)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req;
struct fuse_entry_out outarg;
unsigned int len = strlen(link) + 1;
int err;
if (len > FUSE_SYMLINK_MAX)
return -ENAMETOOLONG;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_SYMLINK;
req->in.h.ino = dir->i_ino;
req->in.numargs = 2;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
req->in.args[1].size = len;
req->in.args[1].value = link;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
err = lookup_new_entry(fc, req, dir, entry, &outarg,
req->out.h.unique, S_IFLNK);
else
fuse_put_request(fc, req);
return err;
}
static int fuse_unlink(struct inode *dir, struct dentry *entry)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req = fuse_get_request(fc);
int err;
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_UNLINK;
req->in.h.ino = dir->i_ino;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
err = req->out.h.error;
if (!err) {
/* Set nlink to zero so the inode can be cleared, if
the inode does have more links this will be
discovered at the next lookup/getattr */
/* FIXME: mark inode "not uptodate" */
entry->d_inode->i_nlink = 0;
}
fuse_put_request(fc, req);
return err;
}
static int fuse_rmdir(struct inode *dir, struct dentry *entry)
{
struct fuse_conn *fc = INO_FC(dir);
struct fuse_req *req = fuse_get_request(fc);
int err;
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_RMDIR;
req->in.h.ino = dir->i_ino;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
err = req->out.h.error;
if (!err)
entry->d_inode->i_nlink = 0;
fuse_put_request(fc, req);
return err;
}
static int fuse_rename(struct inode *olddir, struct dentry *oldent,
struct inode *newdir, struct dentry *newent)
{
struct fuse_conn *fc = INO_FC(olddir);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_rename_in inarg;
int err;
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.newdir = newdir->i_ino;
req->in.h.opcode = FUSE_RENAME;
req->in.h.ino = olddir->i_ino;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = oldent->d_name.len + 1;
req->in.args[1].value = oldent->d_name.name;
req->in.args[2].size = newent->d_name.len + 1;
req->in.args[2].value = newent->d_name.name;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
return err;
}
static int fuse_link(struct dentry *entry, struct inode *newdir,
struct dentry *newent)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_link_in inarg;
struct fuse_entry_out outarg;
int err;
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.newdir = newdir->i_ino;
req->in.h.opcode = FUSE_LINK;
req->in.h.ino = inode->i_ino;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = newent->d_name.len + 1;
req->in.args[1].value = newent->d_name.name;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err) {
/* Invalidate old entry, so attributes are refreshed */
d_invalidate(entry);
err = lookup_new_entry(fc, req, newdir, newent, &outarg,
req->out.h.unique, inode->i_mode);
} else
fuse_put_request(fc, req);
return err;
}
int fuse_do_getattr(struct inode *inode)
{
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_attr_out arg;
int err;
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_GETATTR;
req->in.h.ino = inode->i_ino;
req->out.numargs = 1;
req->out.args[0].size = sizeof(arg);
req->out.args[0].value = &arg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
change_attributes(inode, &arg.attr);
fuse_put_request(fc, req);
return err;
}
static int fuse_revalidate(struct dentry *entry)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
if (inode->i_ino == FUSE_ROOT_INO) {
if (!(fc->flags & FUSE_ALLOW_OTHER) &&
current->fsuid != fc->uid)
return -EACCES;
} else if (!entry->d_time || time_before_eq(jiffies, entry->d_time))
return 0;
return fuse_do_getattr(inode);
}
static int _fuse_permission(struct inode *inode, int mask)
{
struct fuse_conn *fc = INO_FC(inode);
if (!(fc->flags & FUSE_ALLOW_OTHER) && current->fsuid != fc->uid)
return -EACCES;
else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
int err = vfs_permission(inode, mask);
/* If permission is denied, try to refresh file
attributes. This is also needed, because the root
node will at first have no permissions */
if (err == -EACCES) {
err = fuse_do_getattr(inode);
if (!err)
err = vfs_permission(inode, mask);
}
/* FIXME: Need some mechanism to revoke permissions:
currently if the filesystem suddenly changes the
file mode, we will not be informed abot that, and
continue to allow access to the file/directory.
This is actually not so grave, since the user can
simply keep access to the file/directory anyway by
keeping it open... */
return err;
} else
return 0;
}
static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
void *dstbuf, filldir_t filldir)
{
while (nbytes >= FUSE_NAME_OFFSET) {
struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
size_t reclen = FUSE_DIRENT_SIZE(dirent);
int over;
if (dirent->namelen > NAME_MAX) {
printk("fuse_readdir: name too long\n");
return -EPROTO;
}
if (reclen > nbytes)
break;
over = filldir(dstbuf, dirent->name, dirent->namelen,
file->f_pos, dirent->ino, dirent->type);
if (over)
break;
buf += reclen;
file->f_pos += reclen;
nbytes -= reclen;
}
return 0;
}
static int fuse_checkdir(struct file *cfile, struct file *file)
{
struct inode *inode;
if (!cfile) {
printk("fuse_getdir: invalid file\n");
return -EPROTO;
}
inode = cfile->f_dentry->d_inode;
if (!S_ISREG(inode->i_mode)) {
printk("fuse_getdir: not a regular file\n");
fput(cfile);
return -EPROTO;
}
file->private_data = cfile;
return 0;
}
static int fuse_getdir(struct file *file)
{
struct inode *inode = file->f_dentry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_getdir_out_i outarg;
int err;
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_GETDIR;
req->in.h.ino = inode->i_ino;
req->out.numargs = 1;
req->out.args[0].size = sizeof(struct fuse_getdir_out);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
err = fuse_checkdir(outarg.file, file);
fuse_put_request(fc, req);
return err;
}
#define DIR_BUFSIZE 2048
static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
{
struct file *cfile = file->private_data;
char *buf;
int ret;
if (!cfile) {
ret = fuse_getdir(file);
if (ret)
return ret;
cfile = file->private_data;
}
buf = kmalloc(DIR_BUFSIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = kernel_read(cfile, file->f_pos, buf, DIR_BUFSIZE);
if (ret < 0)
printk("fuse_readdir: failed to read container file\n");
else
ret = parse_dirfile(buf, ret, file, dstbuf, filldir);
kfree(buf);
return ret;
}
static char *read_link(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req = fuse_get_request(fc);
char *link;
if (!req)
return ERR_PTR(-ERESTARTSYS);
link = (char *) __get_free_page(GFP_KERNEL);
if (!link) {
link = ERR_PTR(-ENOMEM);
goto out;
}
req->in.h.opcode = FUSE_READLINK;
req->in.h.ino = inode->i_ino;
req->out.argvar = 1;
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
req->out.args[0].value = link;
request_send(fc, req);
if (req->out.h.error) {
free_page((unsigned long) link);
link = ERR_PTR(req->out.h.error);
} else
link[req->out.args[0].size] = '\0';
out:
fuse_put_request(fc, req);
return link;
}
static void free_link(char *link)
{
if (!IS_ERR(link))
free_page((unsigned long) link);
}
static int fuse_readlink(struct dentry *dentry, char *buffer, int buflen)
{
int ret;
char *link;
link = read_link(dentry);
ret = vfs_readlink(dentry, buffer, buflen, link);
free_link(link);
return ret;
}
static int fuse_follow_link(struct dentry *dentry, struct nameidata *nd)
{
int ret;
char *link;
link = read_link(dentry);
ret = vfs_follow_link(nd, link);
free_link(link);
return ret;
}
static int fuse_dir_open(struct inode *inode, struct file *file)
{
file->private_data = NULL;
return 0;
}
static int fuse_dir_release(struct inode *inode, struct file *file)
{
struct file *cfile = file->private_data;
if (cfile)
fput(cfile);
return 0;
}
static unsigned int iattr_to_fattr(struct iattr *iattr,
struct fuse_attr *fattr)
{
unsigned int ivalid = iattr->ia_valid;
unsigned int fvalid = 0;
memset(fattr, 0, sizeof(*fattr));
if (ivalid & ATTR_MODE)
fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode;
if (ivalid & ATTR_UID)
fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid;
if (ivalid & ATTR_GID)
fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid;
if (ivalid & ATTR_SIZE)
fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size;
/* You can only _set_ these together (they may change by themselves) */
if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
fvalid |= FATTR_ATIME | FATTR_MTIME;
#ifdef KERNEL_2_6
fattr->atime = iattr->ia_atime.tv_sec;
fattr->mtime = iattr->ia_mtime.tv_sec;
#else
fattr->atime = iattr->ia_atime;
fattr->mtime = iattr->ia_mtime;
#endif
}
return fvalid;
}
static int fuse_setattr(struct dentry *entry, struct iattr *attr)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req = fuse_get_request(fc);
struct fuse_setattr_in inarg;
struct fuse_attr_out outarg;
int err;
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.valid = iattr_to_fattr(attr, &inarg.attr);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.ino = inode->i_ino;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err) {
if (attr->ia_valid & ATTR_SIZE &&
outarg.attr.size < i_size_read(inode))
vmtruncate(inode, outarg.attr.size);
change_attributes(inode, &outarg.attr);
}
fuse_put_request(fc, req);
return err;
}
static int _fuse_dentry_revalidate(struct dentry *entry)
{
if (!entry->d_inode)
return 0;
else if (entry->d_time && time_after(jiffies, entry->d_time)) {
struct inode *inode = entry->d_inode;
struct fuse_entry_out outarg;
int version;
int ret;
ret = fuse_do_lookup(entry->d_parent->d_inode, entry, &outarg,
&version);
if (ret)
return 0;
if (outarg.ino != inode->i_ino)
return 0;
change_attributes(inode, &outarg.attr);
inode->i_version = version;
entry->d_time = time_to_jiffies(outarg.entry_valid,
outarg.entry_valid_nsec);
}
return 1;
}
#ifdef KERNEL_2_6
#define fuse_mknod _fuse_mknod
static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
struct kstat *stat)
{
struct inode *inode = entry->d_inode;
int err = fuse_revalidate(entry);
if (!err)
generic_fillattr(inode, stat);
return err;
}
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
struct nameidata *nd)
{
struct inode *inode;
int err = fuse_lookup_iget(dir, entry, &inode);
if (err)
return ERR_PTR(err);
return d_splice_alias(inode, entry);
}
static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
struct nameidata *nd)
{
return _fuse_create(dir, entry, mode);
}
static int fuse_permission(struct inode *inode, int mask,
struct nameidata *nd)
{
return _fuse_permission(inode, mask);
}
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
{
return _fuse_dentry_revalidate(entry);
}
#else /* KERNEL_2_6 */
#define fuse_create _fuse_create
#define fuse_permission _fuse_permission
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry)
{
struct inode *inode;
struct dentry *alias;
int err = fuse_lookup_iget(dir, entry, &inode);
if (err)
return ERR_PTR(err);
if (inode && S_ISDIR(inode->i_mode) &&
(alias = d_find_alias(inode)) != NULL) {
dput(alias);
iput(inode);
printk("fuse: cannot assign an existing directory\n");
return ERR_PTR(-EPROTO);
}
d_add(entry, inode);
return NULL;
}
static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
int rdev)
{
return _fuse_mknod(dir, entry, mode, rdev);
}
static int fuse_dentry_revalidate(struct dentry *entry, int flags)
{
return _fuse_dentry_revalidate(entry);
}
#endif /* KERNEL_2_6 */
#ifdef HAVE_KERNEL_XATTR
#ifdef KERNEL_2_6
static int fuse_setxattr(struct dentry *entry, const char *name,
const void *value, size_t size, int flags)
#else
static int fuse_setxattr(struct dentry *entry, const char *name,
void *value, size_t size, int flags)
#endif
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req;
struct fuse_setxattr_in inarg;
int err;
if (size > FUSE_XATTR_SIZE_MAX)
return -E2BIG;
if (fc->no_setxattr)
return -EOPNOTSUPP;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
inarg.flags = flags;
req->in.h.opcode = FUSE_SETXATTR;
req->in.h.ino = inode->i_ino;
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = strlen(name) + 1;
req->in.args[1].value = name;
req->in.args[2].size = size;
req->in.args[2].value = value;
request_send(fc, req);
err = req->out.h.error;
if (err == -ENOSYS) {
fc->no_setxattr = 1;
err = -EOPNOTSUPP;
}
fuse_put_request(fc, req);
return err;
}
static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
void *value, size_t size)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req;
struct fuse_getxattr_in inarg;
struct fuse_getxattr_out outarg;
ssize_t ret;
if (fc->no_getxattr)
return -EOPNOTSUPP;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_GETXATTR;
req->in.h.ino = inode->i_ino;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = strlen(name) + 1;
req->in.args[1].value = name;
/* This is really two different operations rolled into one */
req->out.numargs = 1;
if (size) {
req->out.argvar = 1;
req->out.args[0].size = size;
req->out.args[0].value = value;
} else {
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
else {
if (ret == -ENOSYS) {
fc->no_getxattr = 1;
ret = -EOPNOTSUPP;
}
}
fuse_put_request(fc, req);
return ret;
}
static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req;
struct fuse_getxattr_in inarg;
struct fuse_getxattr_out outarg;
ssize_t ret;
if (fc->no_listxattr)
return -EOPNOTSUPP;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_LISTXATTR;
req->in.h.ino = inode->i_ino;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
/* This is really two different operations rolled into one */
req->out.numargs = 1;
if (size) {
req->out.argvar = 1;
req->out.args[0].size = size;
req->out.args[0].value = list;
} else {
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
else {
if (ret == -ENOSYS) {
fc->no_listxattr = 1;
ret = -EOPNOTSUPP;
}
}
fuse_put_request(fc, req);
return ret;
}
static int fuse_removexattr(struct dentry *entry, const char *name)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = INO_FC(inode);
struct fuse_req *req;
int err;
if (fc->no_removexattr)
return -EOPNOTSUPP;
req = fuse_get_request(fc);
if (!req)
return -ERESTARTSYS;
req->in.h.opcode = FUSE_REMOVEXATTR;
req->in.h.ino = inode->i_ino;
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
request_send(fc, req);
err = req->out.h.error;
if (err == -ENOSYS) {
fc->no_removexattr = 1;
err = -EOPNOTSUPP;
}
fuse_put_request(fc, req);
return err;
}
#endif
static struct inode_operations fuse_dir_inode_operations =
{
.lookup = fuse_lookup,
.create = fuse_create,
.mknod = fuse_mknod,
.mkdir = fuse_mkdir,
.symlink = fuse_symlink,
.unlink = fuse_unlink,
.rmdir = fuse_rmdir,
.rename = fuse_rename,
.link = fuse_link,
.setattr = fuse_setattr,
.permission = fuse_permission,
#ifdef KERNEL_2_6
.getattr = fuse_getattr,
#else
.revalidate = fuse_revalidate,
#endif
#ifdef HAVE_KERNEL_XATTR
.setxattr = fuse_setxattr,
.getxattr = fuse_getxattr,
.listxattr = fuse_listxattr,
.removexattr = fuse_removexattr,
#endif
};
static struct file_operations fuse_dir_operations = {
.read = generic_read_dir,
.readdir = fuse_readdir,
.open = fuse_dir_open,
.release = fuse_dir_release,
};
static struct inode_operations fuse_file_inode_operations = {
.setattr = fuse_setattr,
.permission = fuse_permission,
#ifdef KERNEL_2_6
.getattr = fuse_getattr,
#else
.revalidate = fuse_revalidate,
#endif
#ifdef HAVE_KERNEL_XATTR
.setxattr = fuse_setxattr,
.getxattr = fuse_getxattr,
.listxattr = fuse_listxattr,
.removexattr = fuse_removexattr,
#endif
};
static struct inode_operations fuse_symlink_inode_operations =
{
.setattr = fuse_setattr,
.readlink = fuse_readlink,
.follow_link = fuse_follow_link,
#ifdef KERNEL_2_6
.getattr = fuse_getattr,
#else
.revalidate = fuse_revalidate,
#endif
#ifdef HAVE_KERNEL_XATTR
.setxattr = fuse_setxattr,
.getxattr = fuse_getxattr,
.listxattr = fuse_listxattr,
.removexattr = fuse_removexattr,
#endif
};
static struct dentry_operations fuse_dentry_operations = {
.d_revalidate = fuse_dentry_revalidate,
};
/*
* Local Variables:
* indent-tabs-mode: t
* c-basic-offset: 8
* End:
*/