| /* |
| 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); |
| |
| inode->u.generic_ip = inode; |
| } |
| |
| 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) { |
| 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; |
| } |
| |
| return inode; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| |
| in.h.opcode = FUSE_LOOKUP; |
| in.h.ino = dir->i_ino; |
| in.numargs = 1; |
| in.args[0].size = entry->d_name.len + 1; |
| in.args[0].value = entry->d_name.name; |
| out.numargs = 1; |
| out.args[0].size = sizeof(struct fuse_entry_out); |
| out.args[0].value = outarg; |
| request_send(fc, &in, &out); |
| |
| *version = out.h.unique; |
| return out.h.error; |
| } |
| |
| 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) |
| { |
| int err; |
| struct fuse_entry_out outarg; |
| int version; |
| struct inode *inode = NULL; |
| |
| err = fuse_do_lookup(dir, entry, &outarg, &version); |
| if(!err) { |
| inode = fuse_iget(dir->i_sb, outarg.ino, outarg.generation, |
| &outarg.attr, version); |
| if(!inode) |
| return -ENOMEM; |
| } else if(err != -ENOENT) |
| return err; |
| |
| 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 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) |
| return -ENOMEM; |
| |
| /* 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; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_mknod_in inarg; |
| struct fuse_entry_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.mode = mode; |
| inarg.rdev = new_encode_dev(rdev); |
| |
| in.h.opcode = FUSE_MKNOD; |
| in.h.ino = dir->i_ino; |
| in.numargs = 2; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = entry->d_name.len + 1; |
| in.args[1].value = entry->d_name.name; |
| out.numargs = 1; |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| |
| if(out.h.error) |
| return out.h.error; |
| |
| return lookup_new_entry(dir, entry, &outarg, out.h.unique, mode); |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_mkdir_in inarg; |
| struct fuse_entry_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.mode = mode; |
| |
| in.h.opcode = FUSE_MKDIR; |
| in.h.ino = dir->i_ino; |
| in.numargs = 2; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = entry->d_name.len + 1; |
| in.args[1].value = entry->d_name.name; |
| out.numargs = 1; |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| if(out.h.error) |
| return out.h.error; |
| |
| return lookup_new_entry(dir, entry, &outarg, out.h.unique, S_IFDIR); |
| } |
| |
| static int fuse_symlink(struct inode *dir, struct dentry *entry, |
| const char *link) |
| { |
| struct fuse_conn *fc = INO_FC(dir); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_entry_out outarg; |
| |
| in.h.opcode = FUSE_SYMLINK; |
| in.h.ino = dir->i_ino; |
| in.numargs = 2; |
| in.args[0].size = entry->d_name.len + 1; |
| in.args[0].value = entry->d_name.name; |
| in.args[1].size = strlen(link) + 1; |
| in.args[1].value = link; |
| out.numargs = 1; |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| if(out.h.error) |
| return out.h.error; |
| |
| return lookup_new_entry(dir, entry, &outarg, out.h.unique, S_IFLNK); |
| } |
| |
| static int fuse_unlink(struct inode *dir, struct dentry *entry) |
| { |
| struct fuse_conn *fc = INO_FC(dir); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| |
| in.h.opcode = FUSE_UNLINK; |
| in.h.ino = dir->i_ino; |
| in.numargs = 1; |
| in.args[0].size = entry->d_name.len + 1; |
| in.args[0].value = entry->d_name.name; |
| request_send(fc, &in, &out); |
| |
| if(!out.h.error) { |
| /* 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; |
| } |
| |
| return out.h.error; |
| } |
| |
| static int fuse_rmdir(struct inode *dir, struct dentry *entry) |
| { |
| struct fuse_conn *fc = INO_FC(dir); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| |
| in.h.opcode = FUSE_RMDIR; |
| in.h.ino = dir->i_ino; |
| in.numargs = 1; |
| in.args[0].size = entry->d_name.len + 1; |
| in.args[0].value = entry->d_name.name; |
| request_send(fc, &in, &out); |
| if(!out.h.error) |
| entry->d_inode->i_nlink = 0; |
| |
| return out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_rename_in inarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.newdir = newdir->i_ino; |
| |
| in.h.opcode = FUSE_RENAME; |
| in.h.ino = olddir->i_ino; |
| in.numargs = 3; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = oldent->d_name.len + 1; |
| in.args[1].value = oldent->d_name.name; |
| in.args[2].size = newent->d_name.len + 1; |
| in.args[2].value = newent->d_name.name; |
| request_send(fc, &in, &out); |
| |
| return out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_link_in inarg; |
| struct fuse_entry_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.newdir = newdir->i_ino; |
| |
| in.h.opcode = FUSE_LINK; |
| in.h.ino = inode->i_ino; |
| in.numargs = 2; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = newent->d_name.len + 1; |
| in.args[1].value = newent->d_name.name; |
| out.numargs = 1; |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| if(out.h.error) |
| return out.h.error; |
| |
| /* Invalidate old entry, so attributes are refreshed */ |
| d_invalidate(entry); |
| return lookup_new_entry(newdir, newent, &outarg, out.h.unique, |
| inode->i_mode); |
| } |
| |
| int fuse_do_getattr(struct inode *inode) |
| { |
| struct fuse_conn *fc = INO_FC(inode); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_attr_out arg; |
| |
| in.h.opcode = FUSE_GETATTR; |
| in.h.ino = inode->i_ino; |
| out.numargs = 1; |
| out.args[0].size = sizeof(arg); |
| out.args[0].value = &arg; |
| request_send(fc, &in, &out); |
| |
| if(!out.h.error) |
| change_attributes(inode, &arg.attr); |
| |
| return out.h.error; |
| } |
| |
| 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; |
| } |
| |
| #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) |
| return -EISDIR; |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| char *link; |
| |
| link = (char *) __get_free_page(GFP_KERNEL); |
| if(!link) |
| return ERR_PTR(-ENOMEM); |
| |
| in.h.opcode = FUSE_READLINK; |
| in.h.ino = inode->i_ino; |
| out.argvar = 1; |
| out.numargs = 1; |
| out.args[0].size = PAGE_SIZE - 1; |
| out.args[0].value = link; |
| request_send(fc, &in, &out); |
| if(out.h.error) { |
| free_page((unsigned long) link); |
| return ERR_PTR(out.h.error); |
| } |
| |
| link[out.args[0].size] = '\0'; |
| 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) |
| { |
| struct fuse_conn *fc = INO_FC(inode); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_getdir_out_i outarg; |
| |
| in.h.opcode = FUSE_GETDIR; |
| in.h.ino = inode->i_ino; |
| out.numargs = 1; |
| out.args[0].size = sizeof(struct fuse_getdir_out); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| if(!out.h.error) { |
| struct file *cfile = outarg.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 out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_setattr_in inarg; |
| struct fuse_attr_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.valid = iattr_to_fattr(attr, &inarg.attr); |
| |
| in.h.opcode = FUSE_SETATTR; |
| in.h.ino = inode->i_ino; |
| in.numargs = 1; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| out.numargs = 1; |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| request_send(fc, &in, &out); |
| |
| if(!out.h.error) { |
| if(attr->ia_valid & ATTR_SIZE && |
| outarg.attr.size < i_size_read(inode)) |
| vmtruncate(inode, outarg.attr.size); |
| |
| change_attributes(inode, &outarg.attr); |
| } |
| return out.h.error; |
| } |
| |
| 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); |
| } |
| |
| static int fuse_setxattr(struct dentry *entry, const char *name, |
| const void *value, size_t size, int flags) |
| { |
| struct inode *inode = entry->d_inode; |
| struct fuse_conn *fc = INO_FC(inode); |
| struct fuse_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_setxattr_in inarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.size = size; |
| inarg.flags = flags; |
| |
| in.h.opcode = FUSE_SETXATTR; |
| in.h.ino = inode->i_ino; |
| in.numargs = 3; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = strlen(name) + 1; |
| in.args[1].value = name; |
| in.args[2].size = size; |
| in.args[2].value = value; |
| request_send(fc, &in, &out); |
| return out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_getxattr_in inarg; |
| struct fuse_getxattr_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.size = size; |
| |
| in.h.opcode = FUSE_GETXATTR; |
| in.h.ino = inode->i_ino; |
| in.numargs = 2; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| in.args[1].size = strlen(name) + 1; |
| in.args[1].value = name; |
| /* This is really two different operations rolled into one */ |
| out.numargs = 1; |
| if(size) { |
| out.argvar = 1; |
| out.args[0].size = size; |
| out.args[0].value = value; |
| } else { |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| } |
| request_send(fc, &in, &out); |
| if(!out.h.error) |
| return size ? out.args[0].size : outarg.size; |
| else |
| return out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| struct fuse_getxattr_in inarg; |
| struct fuse_getxattr_out outarg; |
| |
| memset(&inarg, 0, sizeof(inarg)); |
| inarg.size = size; |
| |
| in.h.opcode = FUSE_LISTXATTR; |
| in.h.ino = inode->i_ino; |
| in.numargs = 1; |
| in.args[0].size = sizeof(inarg); |
| in.args[0].value = &inarg; |
| /* This is really two different operations rolled into one */ |
| out.numargs = 1; |
| if(size) { |
| out.argvar = 1; |
| out.args[0].size = size; |
| out.args[0].value = list; |
| } else { |
| out.args[0].size = sizeof(outarg); |
| out.args[0].value = &outarg; |
| } |
| request_send(fc, &in, &out); |
| if(!out.h.error) |
| return size ? out.args[0].size : outarg.size; |
| else |
| return out.h.error; |
| } |
| |
| 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_in in = FUSE_IN_INIT; |
| struct fuse_out out = FUSE_OUT_INIT; |
| |
| in.h.opcode = FUSE_REMOVEXATTR; |
| in.h.ino = inode->i_ino; |
| in.numargs = 1; |
| in.args[0].size = strlen(name) + 1; |
| in.args[0].value = name; |
| request_send(fc, &in, &out); |
| return out.h.error; |
| |
| } |
| |
| #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 */ |
| |
| |
| 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, |
| .setxattr = fuse_setxattr, |
| .getxattr = fuse_getxattr, |
| .listxattr = fuse_listxattr, |
| .removexattr = fuse_removexattr, |
| #else |
| .revalidate = fuse_revalidate, |
| #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, |
| .setxattr = fuse_setxattr, |
| .getxattr = fuse_getxattr, |
| .listxattr = fuse_listxattr, |
| .removexattr = fuse_removexattr, |
| #else |
| .revalidate = fuse_revalidate, |
| #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, |
| .setxattr = fuse_setxattr, |
| .getxattr = fuse_getxattr, |
| .listxattr = fuse_listxattr, |
| .removexattr = fuse_removexattr, |
| #else |
| .revalidate = fuse_revalidate, |
| #endif |
| }; |
| |
| static struct dentry_operations fuse_dentry_operations = { |
| .d_revalidate = fuse_dentry_revalidate, |
| }; |
| |
| /* |
| * Local Variables: |
| * indent-tabs-mode: t |
| * c-basic-offset: 8 |
| * End: |
| */ |