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dpavlin |
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/* |
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FUSE: Filesystem in Userspace |
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Copyright (C) 2001-2004 Miklos Szeredi <miklos@szeredi.hu> |
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This program can be distributed under the terms of the GNU GPL. |
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See the file COPYING. |
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*/ |
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#include "fuse_i.h" |
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#include <linux/pagemap.h> |
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#include <linux/slab.h> |
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#include <linux/file.h> |
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static struct inode_operations fuse_dir_inode_operations; |
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static struct inode_operations fuse_file_inode_operations; |
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static struct inode_operations fuse_symlink_inode_operations; |
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static struct file_operations fuse_dir_operations; |
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static struct dentry_operations fuse_dentry_operations; |
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#ifndef KERNEL_2_6 |
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#define new_decode_dev(x) (x) |
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#define new_encode_dev(x) (x) |
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#endif |
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static void change_attributes(struct inode *inode, struct fuse_attr *attr) |
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{ |
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if (S_ISREG(inode->i_mode) && i_size_read(inode) != attr->size) { |
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#ifdef KERNEL_2_6 |
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invalidate_inode_pages(inode->i_mapping); |
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#else |
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invalidate_inode_pages(inode); |
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#endif |
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} |
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inode->i_mode = (inode->i_mode & S_IFMT) + (attr->mode & 07777); |
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inode->i_nlink = attr->nlink; |
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inode->i_uid = attr->uid; |
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inode->i_gid = attr->gid; |
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i_size_write(inode, attr->size); |
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inode->i_blksize = PAGE_CACHE_SIZE; |
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inode->i_blocks = attr->blocks; |
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#ifdef KERNEL_2_6 |
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inode->i_atime.tv_sec = attr->atime; |
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inode->i_atime.tv_nsec = attr->atimensec; |
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inode->i_mtime.tv_sec = attr->mtime; |
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inode->i_mtime.tv_nsec = attr->mtimensec; |
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inode->i_ctime.tv_sec = attr->ctime; |
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inode->i_ctime.tv_nsec = attr->ctimensec; |
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#else |
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inode->i_atime = attr->atime; |
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inode->i_mtime = attr->mtime; |
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inode->i_ctime = attr->ctime; |
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#endif |
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} |
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static void fuse_init_inode(struct inode *inode, struct fuse_attr *attr) |
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{ |
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inode->i_mode = attr->mode & S_IFMT; |
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i_size_write(inode, attr->size); |
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if (S_ISREG(inode->i_mode)) { |
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inode->i_op = &fuse_file_inode_operations; |
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fuse_init_file_inode(inode); |
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} |
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else if (S_ISDIR(inode->i_mode)) { |
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inode->i_op = &fuse_dir_inode_operations; |
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inode->i_fop = &fuse_dir_operations; |
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} |
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else if (S_ISLNK(inode->i_mode)) { |
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inode->i_op = &fuse_symlink_inode_operations; |
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} |
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else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || |
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S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)){ |
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inode->i_op = &fuse_file_inode_operations; |
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init_special_inode(inode, inode->i_mode, |
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new_decode_dev(attr->rdev)); |
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} else |
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printk("fuse_init_inode: bad file type: %o\n", inode->i_mode); |
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} |
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struct inode *fuse_iget(struct super_block *sb, ino_t ino, int generation, |
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struct fuse_attr *attr, int version) |
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{ |
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struct inode *inode; |
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inode = iget(sb, ino); |
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if (inode) { |
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if (!INO_FI(inode)) { |
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struct fuse_inode *fi = fuse_inode_alloc(); |
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if (!fi) { |
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iput(inode); |
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inode = NULL; |
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goto out; |
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} |
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INO_FI(inode) = fi; |
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inode->i_generation = generation; |
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fuse_init_inode(inode, attr); |
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} else if (inode->i_generation != generation) |
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printk("fuse_iget: bad generation for ino %lu\n", ino); |
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change_attributes(inode, attr); |
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inode->i_version = version; |
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} |
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out: |
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return inode; |
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} |
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static int fuse_send_lookup(struct fuse_conn *fc, struct fuse_req *req, |
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struct inode *dir, struct dentry *entry, |
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struct fuse_entry_out *outarg, int *version) |
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{ |
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req->in.h.opcode = FUSE_LOOKUP; |
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req->in.h.ino = dir->i_ino; |
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req->in.numargs = 1; |
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req->in.args[0].size = entry->d_name.len + 1; |
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req->in.args[0].value = entry->d_name.name; |
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req->out.numargs = 1; |
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req->out.args[0].size = sizeof(struct fuse_entry_out); |
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req->out.args[0].value = outarg; |
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request_send(fc, req); |
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*version = req->out.h.unique; |
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return req->out.h.error; |
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} |
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static int fuse_do_lookup(struct inode *dir, struct dentry *entry, |
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struct fuse_entry_out *outarg, int *version) |
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{ |
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struct fuse_conn *fc = INO_FC(dir); |
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struct fuse_req *req; |
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int err; |
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if (entry->d_name.len > FUSE_NAME_MAX) |
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return -ENAMETOOLONG; |
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req = fuse_get_request(fc); |
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if (!req) |
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return -ERESTARTSYS; |
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err = fuse_send_lookup(fc, req, dir, entry, outarg, version); |
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fuse_put_request(fc, req); |
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return err; |
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} |
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static inline unsigned long time_to_jiffies(unsigned long sec, |
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unsigned long nsec) |
148 |
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{ |
149 |
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/* prevent wrapping of jiffies */ |
150 |
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if (sec + 1 >= LONG_MAX / HZ) |
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return 0; |
152 |
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return jiffies + sec * HZ + nsec / (1000000000 / HZ); |
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} |
155 |
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static int fuse_lookup_iget(struct inode *dir, struct dentry *entry, |
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struct inode **inodep) |
158 |
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{ |
159 |
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struct fuse_conn *fc = INO_FC(dir); |
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int err; |
161 |
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struct fuse_entry_out outarg; |
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int version; |
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struct inode *inode = NULL; |
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struct fuse_req *req; |
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if (entry->d_name.len > FUSE_NAME_MAX) |
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return -ENAMETOOLONG; |
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req = fuse_get_request(fc); |
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if (!req) |
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return -ERESTARTSYS; |
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err = fuse_send_lookup(fc, req, dir, entry, &outarg, &version); |
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if (!err) { |
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inode = fuse_iget(dir->i_sb, outarg.ino, outarg.generation, |
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&outarg.attr, version); |
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if (!inode) { |
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fuse_send_forget(fc, req, outarg.ino, version); |
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return -ENOMEM; |
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} |
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} |
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fuse_put_request(fc, req); |
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if (err && err != -ENOENT) |
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return err; |
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if (inode) { |
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struct fuse_inode *fi = INO_FI(inode); |
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entry->d_time = time_to_jiffies(outarg.entry_valid, |
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outarg.entry_valid_nsec); |
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fi->i_time = time_to_jiffies(outarg.attr_valid, |
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outarg.attr_valid_nsec); |
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} |
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entry->d_op = &fuse_dentry_operations; |
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*inodep = inode; |
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return 0; |
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} |
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static void fuse_invalidate_attr(struct inode *inode) |
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{ |
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struct fuse_inode *fi = INO_FI(inode); |
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fi->i_time = jiffies - 1; |
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} |
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static int lookup_new_entry(struct fuse_conn *fc, struct fuse_req *req, |
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struct inode *dir, struct dentry *entry, |
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struct fuse_entry_out *outarg, int version, |
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int mode) |
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{ |
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struct inode *inode; |
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struct fuse_inode *fi; |
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inode = fuse_iget(dir->i_sb, outarg->ino, outarg->generation, |
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&outarg->attr, version); |
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if (!inode) { |
214 |
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fuse_send_forget(fc, req, outarg->ino, version); |
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return -ENOMEM; |
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} |
217 |
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fuse_put_request(fc, req); |
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/* Don't allow userspace to do really stupid things... */ |
220 |
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if ((inode->i_mode ^ mode) & S_IFMT) { |
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iput(inode); |
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printk("fuse_mknod: inode has wrong type\n"); |
223 |
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return -EINVAL; |
224 |
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} |
225 |
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226 |
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entry->d_time = time_to_jiffies(outarg->entry_valid, |
227 |
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outarg->entry_valid_nsec); |
228 |
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229 |
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fi = INO_FI(inode); |
230 |
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fi->i_time = time_to_jiffies(outarg->attr_valid, |
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outarg->attr_valid_nsec); |
232 |
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233 |
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d_instantiate(entry, inode); |
234 |
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fuse_invalidate_attr(dir); |
235 |
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return 0; |
236 |
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} |
237 |
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238 |
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239 |
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static int _fuse_mknod(struct inode *dir, struct dentry *entry, int mode, |
240 |
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dev_t rdev) |
241 |
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{ |
242 |
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struct fuse_conn *fc = INO_FC(dir); |
243 |
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struct fuse_req *req = fuse_get_request(fc); |
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struct fuse_mknod_in inarg; |
245 |
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struct fuse_entry_out outarg; |
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int err; |
247 |
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248 |
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if (!req) |
249 |
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return -ERESTARTSYS; |
250 |
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251 |
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memset(&inarg, 0, sizeof(inarg)); |
252 |
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inarg.mode = mode; |
253 |
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inarg.rdev = new_encode_dev(rdev); |
254 |
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req->in.h.opcode = FUSE_MKNOD; |
255 |
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req->in.h.ino = dir->i_ino; |
256 |
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req->in.numargs = 2; |
257 |
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req->in.args[0].size = sizeof(inarg); |
258 |
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req->in.args[0].value = &inarg; |
259 |
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req->in.args[1].size = entry->d_name.len + 1; |
260 |
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req->in.args[1].value = entry->d_name.name; |
261 |
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req->out.numargs = 1; |
262 |
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req->out.args[0].size = sizeof(outarg); |
263 |
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req->out.args[0].value = &outarg; |
264 |
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request_send(fc, req); |
265 |
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err = req->out.h.error; |
266 |
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if (!err) |
267 |
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err = lookup_new_entry(fc, req, dir, entry, &outarg, |
268 |
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req->out.h.unique, mode); |
269 |
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else |
270 |
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fuse_put_request(fc, req); |
271 |
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return err; |
272 |
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} |
273 |
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274 |
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static int _fuse_create(struct inode *dir, struct dentry *entry, int mode) |
275 |
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{ |
276 |
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return _fuse_mknod(dir, entry, mode, 0); |
277 |
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} |
278 |
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279 |
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280 |
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static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode) |
281 |
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{ |
282 |
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struct fuse_conn *fc = INO_FC(dir); |
283 |
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struct fuse_req *req = fuse_get_request(fc); |
284 |
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struct fuse_mkdir_in inarg; |
285 |
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struct fuse_entry_out outarg; |
286 |
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int err; |
287 |
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288 |
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if (!req) |
289 |
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return -ERESTARTSYS; |
290 |
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291 |
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memset(&inarg, 0, sizeof(inarg)); |
292 |
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inarg.mode = mode; |
293 |
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req->in.h.opcode = FUSE_MKDIR; |
294 |
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req->in.h.ino = dir->i_ino; |
295 |
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req->in.numargs = 2; |
296 |
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req->in.args[0].size = sizeof(inarg); |
297 |
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req->in.args[0].value = &inarg; |
298 |
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req->in.args[1].size = entry->d_name.len + 1; |
299 |
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req->in.args[1].value = entry->d_name.name; |
300 |
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req->out.numargs = 1; |
301 |
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req->out.args[0].size = sizeof(outarg); |
302 |
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req->out.args[0].value = &outarg; |
303 |
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request_send(fc, req); |
304 |
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err = req->out.h.error; |
305 |
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if (!err) |
306 |
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err = lookup_new_entry(fc, req, dir, entry, &outarg, |
307 |
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req->out.h.unique, S_IFDIR); |
308 |
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else |
309 |
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fuse_put_request(fc, req); |
310 |
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return err; |
311 |
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} |
312 |
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313 |
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static int fuse_symlink(struct inode *dir, struct dentry *entry, |
314 |
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const char *link) |
315 |
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{ |
316 |
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struct fuse_conn *fc = INO_FC(dir); |
317 |
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struct fuse_req *req; |
318 |
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struct fuse_entry_out outarg; |
319 |
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unsigned int len = strlen(link) + 1; |
320 |
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int err; |
321 |
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322 |
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if (len > FUSE_SYMLINK_MAX) |
323 |
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return -ENAMETOOLONG; |
324 |
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|
325 |
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req = fuse_get_request(fc); |
326 |
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if (!req) |
327 |
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return -ERESTARTSYS; |
328 |
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|
329 |
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req->in.h.opcode = FUSE_SYMLINK; |
330 |
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req->in.h.ino = dir->i_ino; |
331 |
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req->in.numargs = 2; |
332 |
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req->in.args[0].size = entry->d_name.len + 1; |
333 |
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req->in.args[0].value = entry->d_name.name; |
334 |
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req->in.args[1].size = len; |
335 |
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req->in.args[1].value = link; |
336 |
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req->out.numargs = 1; |
337 |
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req->out.args[0].size = sizeof(outarg); |
338 |
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req->out.args[0].value = &outarg; |
339 |
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request_send(fc, req); |
340 |
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err = req->out.h.error; |
341 |
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if (!err) |
342 |
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err = lookup_new_entry(fc, req, dir, entry, &outarg, |
343 |
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req->out.h.unique, S_IFLNK); |
344 |
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else |
345 |
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fuse_put_request(fc, req); |
346 |
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return err; |
347 |
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} |
348 |
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|
349 |
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static int fuse_unlink(struct inode *dir, struct dentry *entry) |
350 |
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{ |
351 |
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struct fuse_conn *fc = INO_FC(dir); |
352 |
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struct fuse_req *req = fuse_get_request(fc); |
353 |
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int err; |
354 |
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|
355 |
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if (!req) |
356 |
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return -ERESTARTSYS; |
357 |
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|
358 |
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req->in.h.opcode = FUSE_UNLINK; |
359 |
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req->in.h.ino = dir->i_ino; |
360 |
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req->in.numargs = 1; |
361 |
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req->in.args[0].size = entry->d_name.len + 1; |
362 |
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req->in.args[0].value = entry->d_name.name; |
363 |
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request_send(fc, req); |
364 |
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err = req->out.h.error; |
365 |
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if (!err) { |
366 |
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struct inode *inode = entry->d_inode; |
367 |
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|
368 |
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/* Set nlink to zero so the inode can be cleared, if |
369 |
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the inode does have more links this will be |
370 |
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discovered at the next lookup/getattr */ |
371 |
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inode->i_nlink = 0; |
372 |
|
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fuse_invalidate_attr(inode); |
373 |
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fuse_invalidate_attr(dir); |
374 |
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} |
375 |
|
|
fuse_put_request(fc, req); |
376 |
|
|
return err; |
377 |
|
|
} |
378 |
|
|
|
379 |
|
|
static int fuse_rmdir(struct inode *dir, struct dentry *entry) |
380 |
|
|
{ |
381 |
|
|
struct fuse_conn *fc = INO_FC(dir); |
382 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
383 |
|
|
int err; |
384 |
|
|
|
385 |
|
|
if (!req) |
386 |
|
|
return -ERESTARTSYS; |
387 |
|
|
|
388 |
|
|
req->in.h.opcode = FUSE_RMDIR; |
389 |
|
|
req->in.h.ino = dir->i_ino; |
390 |
|
|
req->in.numargs = 1; |
391 |
|
|
req->in.args[0].size = entry->d_name.len + 1; |
392 |
|
|
req->in.args[0].value = entry->d_name.name; |
393 |
|
|
request_send(fc, req); |
394 |
|
|
err = req->out.h.error; |
395 |
|
|
if (!err) { |
396 |
|
|
entry->d_inode->i_nlink = 0; |
397 |
|
|
fuse_invalidate_attr(dir); |
398 |
|
|
} |
399 |
|
|
fuse_put_request(fc, req); |
400 |
|
|
return err; |
401 |
|
|
} |
402 |
|
|
|
403 |
|
|
static int fuse_rename(struct inode *olddir, struct dentry *oldent, |
404 |
|
|
struct inode *newdir, struct dentry *newent) |
405 |
|
|
{ |
406 |
|
|
struct fuse_conn *fc = INO_FC(olddir); |
407 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
408 |
|
|
struct fuse_rename_in inarg; |
409 |
|
|
int err; |
410 |
|
|
|
411 |
|
|
if (!req) |
412 |
|
|
return -ERESTARTSYS; |
413 |
|
|
|
414 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
415 |
|
|
inarg.newdir = newdir->i_ino; |
416 |
|
|
req->in.h.opcode = FUSE_RENAME; |
417 |
|
|
req->in.h.ino = olddir->i_ino; |
418 |
|
|
req->in.numargs = 3; |
419 |
|
|
req->in.args[0].size = sizeof(inarg); |
420 |
|
|
req->in.args[0].value = &inarg; |
421 |
|
|
req->in.args[1].size = oldent->d_name.len + 1; |
422 |
|
|
req->in.args[1].value = oldent->d_name.name; |
423 |
|
|
req->in.args[2].size = newent->d_name.len + 1; |
424 |
|
|
req->in.args[2].value = newent->d_name.name; |
425 |
|
|
request_send(fc, req); |
426 |
|
|
err = req->out.h.error; |
427 |
|
|
fuse_put_request(fc, req); |
428 |
|
|
if (!err) { |
429 |
|
|
fuse_invalidate_attr(olddir); |
430 |
|
|
if (olddir != newdir) |
431 |
|
|
fuse_invalidate_attr(newdir); |
432 |
|
|
} |
433 |
|
|
return err; |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
static int fuse_link(struct dentry *entry, struct inode *newdir, |
437 |
|
|
struct dentry *newent) |
438 |
|
|
{ |
439 |
|
|
struct inode *inode = entry->d_inode; |
440 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
441 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
442 |
|
|
struct fuse_link_in inarg; |
443 |
|
|
struct fuse_entry_out outarg; |
444 |
|
|
int err; |
445 |
|
|
|
446 |
|
|
if (!req) |
447 |
|
|
return -ERESTARTSYS; |
448 |
|
|
|
449 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
450 |
|
|
inarg.newdir = newdir->i_ino; |
451 |
|
|
req->in.h.opcode = FUSE_LINK; |
452 |
|
|
req->in.h.ino = inode->i_ino; |
453 |
|
|
req->in.numargs = 2; |
454 |
|
|
req->in.args[0].size = sizeof(inarg); |
455 |
|
|
req->in.args[0].value = &inarg; |
456 |
|
|
req->in.args[1].size = newent->d_name.len + 1; |
457 |
|
|
req->in.args[1].value = newent->d_name.name; |
458 |
|
|
req->out.numargs = 1; |
459 |
|
|
req->out.args[0].size = sizeof(outarg); |
460 |
|
|
req->out.args[0].value = &outarg; |
461 |
|
|
request_send(fc, req); |
462 |
|
|
err = req->out.h.error; |
463 |
|
|
if (!err) { |
464 |
|
|
/* Invalidate old entry, so attributes are refreshed */ |
465 |
|
|
d_invalidate(entry); |
466 |
|
|
err = lookup_new_entry(fc, req, newdir, newent, &outarg, |
467 |
|
|
req->out.h.unique, inode->i_mode); |
468 |
|
|
} else |
469 |
|
|
fuse_put_request(fc, req); |
470 |
|
|
return err; |
471 |
|
|
} |
472 |
|
|
|
473 |
|
|
int fuse_do_getattr(struct inode *inode) |
474 |
|
|
{ |
475 |
|
|
struct fuse_inode *fi = INO_FI(inode); |
476 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
477 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
478 |
|
|
struct fuse_attr_out arg; |
479 |
|
|
int err; |
480 |
|
|
|
481 |
|
|
if (!req) |
482 |
|
|
return -ERESTARTSYS; |
483 |
|
|
|
484 |
|
|
req->in.h.opcode = FUSE_GETATTR; |
485 |
|
|
req->in.h.ino = inode->i_ino; |
486 |
|
|
req->out.numargs = 1; |
487 |
|
|
req->out.args[0].size = sizeof(arg); |
488 |
|
|
req->out.args[0].value = &arg; |
489 |
|
|
request_send(fc, req); |
490 |
|
|
err = req->out.h.error; |
491 |
|
|
if (!err) { |
492 |
|
|
change_attributes(inode, &arg.attr); |
493 |
|
|
fi->i_time = time_to_jiffies(arg.attr_valid, |
494 |
|
|
arg.attr_valid_nsec); |
495 |
|
|
} |
496 |
|
|
fuse_put_request(fc, req); |
497 |
|
|
return err; |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
static int fuse_revalidate(struct dentry *entry) |
501 |
|
|
{ |
502 |
|
|
struct inode *inode = entry->d_inode; |
503 |
|
|
struct fuse_inode *fi = INO_FI(inode); |
504 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
505 |
|
|
|
506 |
|
|
if (inode->i_ino == FUSE_ROOT_INO) { |
507 |
|
|
if (!(fc->flags & FUSE_ALLOW_OTHER) && |
508 |
|
|
current->fsuid != fc->uid) |
509 |
|
|
return -EACCES; |
510 |
|
|
} else if (!fi->i_time || time_before_eq(jiffies, fi->i_time)) |
511 |
|
|
return 0; |
512 |
|
|
|
513 |
|
|
return fuse_do_getattr(inode); |
514 |
|
|
} |
515 |
|
|
|
516 |
|
|
static int _fuse_permission(struct inode *inode, int mask) |
517 |
|
|
{ |
518 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
519 |
|
|
|
520 |
|
|
if (!(fc->flags & FUSE_ALLOW_OTHER) && current->fsuid != fc->uid) |
521 |
|
|
return -EACCES; |
522 |
|
|
else if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
523 |
|
|
int err = vfs_permission(inode, mask); |
524 |
|
|
|
525 |
|
|
/* If permission is denied, try to refresh file |
526 |
|
|
attributes. This is also needed, because the root |
527 |
|
|
node will at first have no permissions */ |
528 |
|
|
|
529 |
|
|
if (err == -EACCES) { |
530 |
|
|
err = fuse_do_getattr(inode); |
531 |
|
|
if (!err) |
532 |
|
|
err = vfs_permission(inode, mask); |
533 |
|
|
} |
534 |
|
|
|
535 |
|
|
/* FIXME: Need some mechanism to revoke permissions: |
536 |
|
|
currently if the filesystem suddenly changes the |
537 |
|
|
file mode, we will not be informed abot that, and |
538 |
|
|
continue to allow access to the file/directory. |
539 |
|
|
|
540 |
|
|
This is actually not so grave, since the user can |
541 |
|
|
simply keep access to the file/directory anyway by |
542 |
|
|
keeping it open... */ |
543 |
|
|
|
544 |
|
|
return err; |
545 |
|
|
} else |
546 |
|
|
return 0; |
547 |
|
|
} |
548 |
|
|
|
549 |
|
|
static int parse_dirfile(char *buf, size_t nbytes, struct file *file, |
550 |
|
|
void *dstbuf, filldir_t filldir) |
551 |
|
|
{ |
552 |
|
|
while (nbytes >= FUSE_NAME_OFFSET) { |
553 |
|
|
struct fuse_dirent *dirent = (struct fuse_dirent *) buf; |
554 |
|
|
size_t reclen = FUSE_DIRENT_SIZE(dirent); |
555 |
|
|
int over; |
556 |
|
|
if (dirent->namelen > NAME_MAX) { |
557 |
|
|
printk("fuse_readdir: name too long\n"); |
558 |
|
|
return -EPROTO; |
559 |
|
|
} |
560 |
|
|
if (reclen > nbytes) |
561 |
|
|
break; |
562 |
|
|
|
563 |
|
|
over = filldir(dstbuf, dirent->name, dirent->namelen, |
564 |
|
|
file->f_pos, dirent->ino, dirent->type); |
565 |
|
|
if (over) |
566 |
|
|
break; |
567 |
|
|
|
568 |
|
|
buf += reclen; |
569 |
|
|
file->f_pos += reclen; |
570 |
|
|
nbytes -= reclen; |
571 |
|
|
} |
572 |
|
|
|
573 |
|
|
return 0; |
574 |
|
|
} |
575 |
|
|
|
576 |
|
|
static int fuse_checkdir(struct file *cfile, struct file *file) |
577 |
|
|
{ |
578 |
|
|
struct inode *inode; |
579 |
|
|
if (!cfile) { |
580 |
|
|
printk("fuse_getdir: invalid file\n"); |
581 |
|
|
return -EPROTO; |
582 |
|
|
} |
583 |
|
|
inode = cfile->f_dentry->d_inode; |
584 |
|
|
if (!S_ISREG(inode->i_mode)) { |
585 |
|
|
printk("fuse_getdir: not a regular file\n"); |
586 |
|
|
fput(cfile); |
587 |
|
|
return -EPROTO; |
588 |
|
|
} |
589 |
|
|
|
590 |
|
|
file->private_data = cfile; |
591 |
|
|
return 0; |
592 |
|
|
} |
593 |
|
|
|
594 |
|
|
static int fuse_getdir(struct file *file) |
595 |
|
|
{ |
596 |
|
|
struct inode *inode = file->f_dentry->d_inode; |
597 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
598 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
599 |
|
|
struct fuse_getdir_out_i outarg; |
600 |
|
|
int err; |
601 |
|
|
|
602 |
|
|
if (!req) |
603 |
|
|
return -ERESTARTSYS; |
604 |
|
|
|
605 |
|
|
req->in.h.opcode = FUSE_GETDIR; |
606 |
|
|
req->in.h.ino = inode->i_ino; |
607 |
|
|
req->out.numargs = 1; |
608 |
|
|
req->out.args[0].size = sizeof(struct fuse_getdir_out); |
609 |
|
|
req->out.args[0].value = &outarg; |
610 |
|
|
request_send(fc, req); |
611 |
|
|
err = req->out.h.error; |
612 |
|
|
if (!err) |
613 |
|
|
err = fuse_checkdir(outarg.file, file); |
614 |
|
|
fuse_put_request(fc, req); |
615 |
|
|
return err; |
616 |
|
|
} |
617 |
|
|
|
618 |
|
|
#define DIR_BUFSIZE 2048 |
619 |
|
|
static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir) |
620 |
|
|
{ |
621 |
|
|
struct file *cfile = file->private_data; |
622 |
|
|
char *buf; |
623 |
|
|
int ret; |
624 |
|
|
|
625 |
|
|
if (!cfile) { |
626 |
|
|
ret = fuse_getdir(file); |
627 |
|
|
if (ret) |
628 |
|
|
return ret; |
629 |
|
|
|
630 |
|
|
cfile = file->private_data; |
631 |
|
|
} |
632 |
|
|
|
633 |
|
|
buf = kmalloc(DIR_BUFSIZE, GFP_KERNEL); |
634 |
|
|
if (!buf) |
635 |
|
|
return -ENOMEM; |
636 |
|
|
|
637 |
|
|
ret = kernel_read(cfile, file->f_pos, buf, DIR_BUFSIZE); |
638 |
|
|
if (ret < 0) |
639 |
|
|
printk("fuse_readdir: failed to read container file\n"); |
640 |
|
|
else |
641 |
|
|
ret = parse_dirfile(buf, ret, file, dstbuf, filldir); |
642 |
|
|
|
643 |
|
|
kfree(buf); |
644 |
|
|
return ret; |
645 |
|
|
} |
646 |
|
|
|
647 |
|
|
static char *read_link(struct dentry *dentry) |
648 |
|
|
{ |
649 |
|
|
struct inode *inode = dentry->d_inode; |
650 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
651 |
|
|
struct fuse_req *req = fuse_get_request(fc); |
652 |
|
|
char *link; |
653 |
|
|
|
654 |
|
|
if (!req) |
655 |
|
|
return ERR_PTR(-ERESTARTSYS); |
656 |
|
|
|
657 |
|
|
link = (char *) __get_free_page(GFP_KERNEL); |
658 |
|
|
if (!link) { |
659 |
|
|
link = ERR_PTR(-ENOMEM); |
660 |
|
|
goto out; |
661 |
|
|
} |
662 |
|
|
req->in.h.opcode = FUSE_READLINK; |
663 |
|
|
req->in.h.ino = inode->i_ino; |
664 |
|
|
req->out.argvar = 1; |
665 |
|
|
req->out.numargs = 1; |
666 |
|
|
req->out.args[0].size = PAGE_SIZE - 1; |
667 |
|
|
req->out.args[0].value = link; |
668 |
|
|
request_send(fc, req); |
669 |
|
|
if (req->out.h.error) { |
670 |
|
|
free_page((unsigned long) link); |
671 |
|
|
link = ERR_PTR(req->out.h.error); |
672 |
|
|
} else |
673 |
|
|
link[req->out.args[0].size] = '\0'; |
674 |
|
|
out: |
675 |
|
|
fuse_put_request(fc, req); |
676 |
|
|
return link; |
677 |
|
|
} |
678 |
|
|
|
679 |
|
|
static void free_link(char *link) |
680 |
|
|
{ |
681 |
|
|
if (!IS_ERR(link)) |
682 |
|
|
free_page((unsigned long) link); |
683 |
|
|
} |
684 |
|
|
|
685 |
|
|
static int fuse_readlink(struct dentry *dentry, char *buffer, int buflen) |
686 |
|
|
{ |
687 |
|
|
int ret; |
688 |
|
|
char *link; |
689 |
|
|
|
690 |
|
|
link = read_link(dentry); |
691 |
|
|
ret = vfs_readlink(dentry, buffer, buflen, link); |
692 |
|
|
free_link(link); |
693 |
|
|
return ret; |
694 |
|
|
} |
695 |
|
|
|
696 |
|
|
static int fuse_follow_link(struct dentry *dentry, struct nameidata *nd) |
697 |
|
|
{ |
698 |
|
|
int ret; |
699 |
|
|
char *link; |
700 |
|
|
|
701 |
|
|
link = read_link(dentry); |
702 |
|
|
ret = vfs_follow_link(nd, link); |
703 |
|
|
free_link(link); |
704 |
|
|
return ret; |
705 |
|
|
} |
706 |
|
|
|
707 |
|
|
static int fuse_dir_open(struct inode *inode, struct file *file) |
708 |
|
|
{ |
709 |
|
|
file->private_data = NULL; |
710 |
|
|
return 0; |
711 |
|
|
} |
712 |
|
|
|
713 |
|
|
static int fuse_dir_release(struct inode *inode, struct file *file) |
714 |
|
|
{ |
715 |
|
|
struct file *cfile = file->private_data; |
716 |
|
|
|
717 |
|
|
if (cfile) |
718 |
|
|
fput(cfile); |
719 |
|
|
|
720 |
|
|
return 0; |
721 |
|
|
} |
722 |
|
|
|
723 |
|
|
static unsigned int iattr_to_fattr(struct iattr *iattr, |
724 |
|
|
struct fuse_attr *fattr) |
725 |
|
|
{ |
726 |
|
|
unsigned int ivalid = iattr->ia_valid; |
727 |
|
|
unsigned int fvalid = 0; |
728 |
|
|
|
729 |
|
|
memset(fattr, 0, sizeof(*fattr)); |
730 |
|
|
|
731 |
|
|
if (ivalid & ATTR_MODE) |
732 |
|
|
fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode; |
733 |
|
|
if (ivalid & ATTR_UID) |
734 |
|
|
fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid; |
735 |
|
|
if (ivalid & ATTR_GID) |
736 |
|
|
fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid; |
737 |
|
|
if (ivalid & ATTR_SIZE) |
738 |
|
|
fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size; |
739 |
|
|
/* You can only _set_ these together (they may change by themselves) */ |
740 |
|
|
if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) { |
741 |
|
|
fvalid |= FATTR_ATIME | FATTR_MTIME; |
742 |
|
|
#ifdef KERNEL_2_6 |
743 |
|
|
fattr->atime = iattr->ia_atime.tv_sec; |
744 |
|
|
fattr->mtime = iattr->ia_mtime.tv_sec; |
745 |
|
|
#else |
746 |
|
|
fattr->atime = iattr->ia_atime; |
747 |
|
|
fattr->mtime = iattr->ia_mtime; |
748 |
|
|
#endif |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
return fvalid; |
752 |
|
|
} |
753 |
|
|
|
754 |
|
|
static int fuse_setattr(struct dentry *entry, struct iattr *attr) |
755 |
|
|
{ |
756 |
|
|
struct inode *inode = entry->d_inode; |
757 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
758 |
|
|
struct fuse_inode *fi = INO_FI(inode); |
759 |
|
|
struct fuse_req *req; |
760 |
|
|
struct fuse_setattr_in inarg; |
761 |
|
|
struct fuse_attr_out outarg; |
762 |
|
|
int err; |
763 |
|
|
int is_truncate = 0; |
764 |
|
|
|
765 |
|
|
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { |
766 |
|
|
err = inode_change_ok(inode, attr); |
767 |
|
|
if (err) |
768 |
|
|
return err; |
769 |
|
|
} |
770 |
|
|
|
771 |
|
|
if (attr->ia_valid & ATTR_SIZE) { |
772 |
|
|
unsigned long limit; |
773 |
|
|
is_truncate = 1; |
774 |
|
|
|
775 |
|
|
limit = current->rlim[RLIMIT_FSIZE].rlim_cur; |
776 |
|
|
if (limit != RLIM_INFINITY && attr->ia_size > limit) { |
777 |
|
|
send_sig(SIGXFSZ, current, 0); |
778 |
|
|
return -EFBIG; |
779 |
|
|
} |
780 |
|
|
//fuse_sync_inode(inode); |
781 |
|
|
} |
782 |
|
|
|
783 |
|
|
req = fuse_get_request(fc); |
784 |
|
|
if (!req) |
785 |
|
|
return -ERESTARTSYS; |
786 |
|
|
|
787 |
|
|
if (is_truncate) |
788 |
|
|
down_write(&fi->write_sem); |
789 |
|
|
|
790 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
791 |
|
|
inarg.valid = iattr_to_fattr(attr, &inarg.attr); |
792 |
|
|
req->in.h.opcode = FUSE_SETATTR; |
793 |
|
|
req->in.h.ino = inode->i_ino; |
794 |
|
|
req->in.numargs = 1; |
795 |
|
|
req->in.args[0].size = sizeof(inarg); |
796 |
|
|
req->in.args[0].value = &inarg; |
797 |
|
|
req->out.numargs = 1; |
798 |
|
|
req->out.args[0].size = sizeof(outarg); |
799 |
|
|
req->out.args[0].value = &outarg; |
800 |
|
|
request_send(fc, req); |
801 |
|
|
err = req->out.h.error; |
802 |
|
|
fuse_put_request(fc, req); |
803 |
|
|
|
804 |
|
|
if (!err) { |
805 |
|
|
if (is_truncate) { |
806 |
|
|
loff_t origsize = i_size_read(inode); |
807 |
|
|
i_size_write(inode, outarg.attr.size); |
808 |
|
|
up_write(&fi->write_sem); |
809 |
|
|
if (origsize > outarg.attr.size) |
810 |
|
|
vmtruncate(inode, outarg.attr.size); |
811 |
|
|
} |
812 |
|
|
change_attributes(inode, &outarg.attr); |
813 |
|
|
fi->i_time = time_to_jiffies(outarg.attr_valid, |
814 |
|
|
outarg.attr_valid_nsec); |
815 |
|
|
} else if (is_truncate) |
816 |
|
|
up_write(&fi->write_sem); |
817 |
|
|
|
818 |
|
|
return err; |
819 |
|
|
} |
820 |
|
|
|
821 |
|
|
static int _fuse_dentry_revalidate(struct dentry *entry) |
822 |
|
|
{ |
823 |
|
|
if (!entry->d_inode) |
824 |
|
|
return 0; |
825 |
|
|
else if (entry->d_time && time_after(jiffies, entry->d_time)) { |
826 |
|
|
struct inode *inode = entry->d_inode; |
827 |
|
|
struct fuse_inode *fi = INO_FI(inode); |
828 |
|
|
struct fuse_entry_out outarg; |
829 |
|
|
int version; |
830 |
|
|
int ret; |
831 |
|
|
|
832 |
|
|
ret = fuse_do_lookup(entry->d_parent->d_inode, entry, &outarg, |
833 |
|
|
&version); |
834 |
|
|
if (ret) |
835 |
|
|
return 0; |
836 |
|
|
|
837 |
|
|
if (outarg.ino != inode->i_ino) |
838 |
|
|
return 0; |
839 |
|
|
|
840 |
|
|
change_attributes(inode, &outarg.attr); |
841 |
|
|
inode->i_version = version; |
842 |
|
|
entry->d_time = time_to_jiffies(outarg.entry_valid, |
843 |
|
|
outarg.entry_valid_nsec); |
844 |
|
|
fi->i_time = time_to_jiffies(outarg.attr_valid, |
845 |
|
|
outarg.attr_valid_nsec); |
846 |
|
|
} |
847 |
|
|
return 1; |
848 |
|
|
} |
849 |
|
|
|
850 |
|
|
#ifdef KERNEL_2_6 |
851 |
|
|
|
852 |
|
|
#define fuse_mknod _fuse_mknod |
853 |
|
|
|
854 |
|
|
static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry, |
855 |
|
|
struct kstat *stat) |
856 |
|
|
{ |
857 |
|
|
struct inode *inode = entry->d_inode; |
858 |
|
|
int err = fuse_revalidate(entry); |
859 |
|
|
if (!err) |
860 |
|
|
generic_fillattr(inode, stat); |
861 |
|
|
|
862 |
|
|
return err; |
863 |
|
|
} |
864 |
|
|
|
865 |
|
|
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, |
866 |
|
|
struct nameidata *nd) |
867 |
|
|
{ |
868 |
|
|
struct inode *inode; |
869 |
|
|
int err = fuse_lookup_iget(dir, entry, &inode); |
870 |
|
|
if (err) |
871 |
|
|
return ERR_PTR(err); |
872 |
|
|
return d_splice_alias(inode, entry); |
873 |
|
|
} |
874 |
|
|
|
875 |
|
|
static int fuse_create(struct inode *dir, struct dentry *entry, int mode, |
876 |
|
|
struct nameidata *nd) |
877 |
|
|
{ |
878 |
|
|
return _fuse_create(dir, entry, mode); |
879 |
|
|
} |
880 |
|
|
|
881 |
|
|
static int fuse_permission(struct inode *inode, int mask, |
882 |
|
|
struct nameidata *nd) |
883 |
|
|
{ |
884 |
|
|
return _fuse_permission(inode, mask); |
885 |
|
|
} |
886 |
|
|
|
887 |
|
|
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) |
888 |
|
|
{ |
889 |
|
|
return _fuse_dentry_revalidate(entry); |
890 |
|
|
} |
891 |
|
|
|
892 |
|
|
#else /* KERNEL_2_6 */ |
893 |
|
|
|
894 |
|
|
#define fuse_create _fuse_create |
895 |
|
|
#define fuse_permission _fuse_permission |
896 |
|
|
|
897 |
|
|
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry) |
898 |
|
|
{ |
899 |
|
|
struct inode *inode; |
900 |
|
|
struct dentry *alias; |
901 |
|
|
|
902 |
|
|
int err = fuse_lookup_iget(dir, entry, &inode); |
903 |
|
|
if (err) |
904 |
|
|
return ERR_PTR(err); |
905 |
|
|
|
906 |
|
|
if (inode && S_ISDIR(inode->i_mode) && |
907 |
|
|
(alias = d_find_alias(inode)) != NULL) { |
908 |
|
|
dput(alias); |
909 |
|
|
iput(inode); |
910 |
|
|
printk("fuse: cannot assign an existing directory\n"); |
911 |
|
|
return ERR_PTR(-EPROTO); |
912 |
|
|
} |
913 |
|
|
|
914 |
|
|
d_add(entry, inode); |
915 |
|
|
return NULL; |
916 |
|
|
} |
917 |
|
|
|
918 |
|
|
static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode, |
919 |
|
|
int rdev) |
920 |
|
|
{ |
921 |
|
|
return _fuse_mknod(dir, entry, mode, rdev); |
922 |
|
|
} |
923 |
|
|
|
924 |
|
|
static int fuse_dentry_revalidate(struct dentry *entry, int flags) |
925 |
|
|
{ |
926 |
|
|
return _fuse_dentry_revalidate(entry); |
927 |
|
|
} |
928 |
|
|
#endif /* KERNEL_2_6 */ |
929 |
|
|
|
930 |
|
|
#ifdef HAVE_KERNEL_XATTR |
931 |
|
|
|
932 |
|
|
#ifdef KERNEL_2_6 |
933 |
|
|
static int fuse_setxattr(struct dentry *entry, const char *name, |
934 |
|
|
const void *value, size_t size, int flags) |
935 |
|
|
#else |
936 |
|
|
static int fuse_setxattr(struct dentry *entry, const char *name, |
937 |
|
|
void *value, size_t size, int flags) |
938 |
|
|
#endif |
939 |
|
|
{ |
940 |
|
|
struct inode *inode = entry->d_inode; |
941 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
942 |
|
|
struct fuse_req *req; |
943 |
|
|
struct fuse_setxattr_in inarg; |
944 |
|
|
int err; |
945 |
|
|
|
946 |
|
|
if (size > FUSE_XATTR_SIZE_MAX) |
947 |
|
|
return -E2BIG; |
948 |
|
|
|
949 |
|
|
if (fc->no_setxattr) |
950 |
|
|
return -EOPNOTSUPP; |
951 |
|
|
|
952 |
|
|
req = fuse_get_request(fc); |
953 |
|
|
if (!req) |
954 |
|
|
return -ERESTARTSYS; |
955 |
|
|
|
956 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
957 |
|
|
inarg.size = size; |
958 |
|
|
inarg.flags = flags; |
959 |
|
|
req->in.h.opcode = FUSE_SETXATTR; |
960 |
|
|
req->in.h.ino = inode->i_ino; |
961 |
|
|
req->in.numargs = 3; |
962 |
|
|
req->in.args[0].size = sizeof(inarg); |
963 |
|
|
req->in.args[0].value = &inarg; |
964 |
|
|
req->in.args[1].size = strlen(name) + 1; |
965 |
|
|
req->in.args[1].value = name; |
966 |
|
|
req->in.args[2].size = size; |
967 |
|
|
req->in.args[2].value = value; |
968 |
|
|
request_send(fc, req); |
969 |
|
|
err = req->out.h.error; |
970 |
|
|
if (err == -ENOSYS) { |
971 |
|
|
fc->no_setxattr = 1; |
972 |
|
|
err = -EOPNOTSUPP; |
973 |
|
|
} |
974 |
|
|
fuse_put_request(fc, req); |
975 |
|
|
return err; |
976 |
|
|
} |
977 |
|
|
|
978 |
|
|
static ssize_t fuse_getxattr(struct dentry *entry, const char *name, |
979 |
|
|
void *value, size_t size) |
980 |
|
|
{ |
981 |
|
|
struct inode *inode = entry->d_inode; |
982 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
983 |
|
|
struct fuse_req *req; |
984 |
|
|
struct fuse_getxattr_in inarg; |
985 |
|
|
struct fuse_getxattr_out outarg; |
986 |
|
|
ssize_t ret; |
987 |
|
|
|
988 |
|
|
if (fc->no_getxattr) |
989 |
|
|
return -EOPNOTSUPP; |
990 |
|
|
|
991 |
|
|
req = fuse_get_request(fc); |
992 |
|
|
if (!req) |
993 |
|
|
return -ERESTARTSYS; |
994 |
|
|
|
995 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
996 |
|
|
inarg.size = size; |
997 |
|
|
req->in.h.opcode = FUSE_GETXATTR; |
998 |
|
|
req->in.h.ino = inode->i_ino; |
999 |
|
|
req->in.numargs = 2; |
1000 |
|
|
req->in.args[0].size = sizeof(inarg); |
1001 |
|
|
req->in.args[0].value = &inarg; |
1002 |
|
|
req->in.args[1].size = strlen(name) + 1; |
1003 |
|
|
req->in.args[1].value = name; |
1004 |
|
|
/* This is really two different operations rolled into one */ |
1005 |
|
|
req->out.numargs = 1; |
1006 |
|
|
if (size) { |
1007 |
|
|
req->out.argvar = 1; |
1008 |
|
|
req->out.args[0].size = size; |
1009 |
|
|
req->out.args[0].value = value; |
1010 |
|
|
} else { |
1011 |
|
|
req->out.args[0].size = sizeof(outarg); |
1012 |
|
|
req->out.args[0].value = &outarg; |
1013 |
|
|
} |
1014 |
|
|
request_send(fc, req); |
1015 |
|
|
ret = req->out.h.error; |
1016 |
|
|
if (!ret) |
1017 |
|
|
ret = size ? req->out.args[0].size : outarg.size; |
1018 |
|
|
else { |
1019 |
|
|
if (ret == -ENOSYS) { |
1020 |
|
|
fc->no_getxattr = 1; |
1021 |
|
|
ret = -EOPNOTSUPP; |
1022 |
|
|
} |
1023 |
|
|
} |
1024 |
|
|
fuse_put_request(fc, req); |
1025 |
|
|
return ret; |
1026 |
|
|
} |
1027 |
|
|
|
1028 |
|
|
static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size) |
1029 |
|
|
{ |
1030 |
|
|
struct inode *inode = entry->d_inode; |
1031 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
1032 |
|
|
struct fuse_req *req; |
1033 |
|
|
struct fuse_getxattr_in inarg; |
1034 |
|
|
struct fuse_getxattr_out outarg; |
1035 |
|
|
ssize_t ret; |
1036 |
|
|
|
1037 |
|
|
if (fc->no_listxattr) |
1038 |
|
|
return -EOPNOTSUPP; |
1039 |
|
|
|
1040 |
|
|
req = fuse_get_request(fc); |
1041 |
|
|
if (!req) |
1042 |
|
|
return -ERESTARTSYS; |
1043 |
|
|
|
1044 |
|
|
memset(&inarg, 0, sizeof(inarg)); |
1045 |
|
|
inarg.size = size; |
1046 |
|
|
req->in.h.opcode = FUSE_LISTXATTR; |
1047 |
|
|
req->in.h.ino = inode->i_ino; |
1048 |
|
|
req->in.numargs = 1; |
1049 |
|
|
req->in.args[0].size = sizeof(inarg); |
1050 |
|
|
req->in.args[0].value = &inarg; |
1051 |
|
|
/* This is really two different operations rolled into one */ |
1052 |
|
|
req->out.numargs = 1; |
1053 |
|
|
if (size) { |
1054 |
|
|
req->out.argvar = 1; |
1055 |
|
|
req->out.args[0].size = size; |
1056 |
|
|
req->out.args[0].value = list; |
1057 |
|
|
} else { |
1058 |
|
|
req->out.args[0].size = sizeof(outarg); |
1059 |
|
|
req->out.args[0].value = &outarg; |
1060 |
|
|
} |
1061 |
|
|
request_send(fc, req); |
1062 |
|
|
ret = req->out.h.error; |
1063 |
|
|
if (!ret) |
1064 |
|
|
ret = size ? req->out.args[0].size : outarg.size; |
1065 |
|
|
else { |
1066 |
|
|
if (ret == -ENOSYS) { |
1067 |
|
|
fc->no_listxattr = 1; |
1068 |
|
|
ret = -EOPNOTSUPP; |
1069 |
|
|
} |
1070 |
|
|
} |
1071 |
|
|
fuse_put_request(fc, req); |
1072 |
|
|
return ret; |
1073 |
|
|
} |
1074 |
|
|
|
1075 |
|
|
static int fuse_removexattr(struct dentry *entry, const char *name) |
1076 |
|
|
{ |
1077 |
|
|
struct inode *inode = entry->d_inode; |
1078 |
|
|
struct fuse_conn *fc = INO_FC(inode); |
1079 |
|
|
struct fuse_req *req; |
1080 |
|
|
int err; |
1081 |
|
|
|
1082 |
|
|
if (fc->no_removexattr) |
1083 |
|
|
return -EOPNOTSUPP; |
1084 |
|
|
|
1085 |
|
|
req = fuse_get_request(fc); |
1086 |
|
|
if (!req) |
1087 |
|
|
return -ERESTARTSYS; |
1088 |
|
|
|
1089 |
|
|
req->in.h.opcode = FUSE_REMOVEXATTR; |
1090 |
|
|
req->in.h.ino = inode->i_ino; |
1091 |
|
|
req->in.numargs = 1; |
1092 |
|
|
req->in.args[0].size = strlen(name) + 1; |
1093 |
|
|
req->in.args[0].value = name; |
1094 |
|
|
request_send(fc, req); |
1095 |
|
|
err = req->out.h.error; |
1096 |
|
|
if (err == -ENOSYS) { |
1097 |
|
|
fc->no_removexattr = 1; |
1098 |
|
|
err = -EOPNOTSUPP; |
1099 |
|
|
} |
1100 |
|
|
fuse_put_request(fc, req); |
1101 |
|
|
return err; |
1102 |
|
|
} |
1103 |
|
|
|
1104 |
|
|
#endif |
1105 |
|
|
|
1106 |
|
|
static struct inode_operations fuse_dir_inode_operations = |
1107 |
|
|
{ |
1108 |
|
|
.lookup = fuse_lookup, |
1109 |
|
|
.create = fuse_create, |
1110 |
|
|
.mknod = fuse_mknod, |
1111 |
|
|
.mkdir = fuse_mkdir, |
1112 |
|
|
.symlink = fuse_symlink, |
1113 |
|
|
.unlink = fuse_unlink, |
1114 |
|
|
.rmdir = fuse_rmdir, |
1115 |
|
|
.rename = fuse_rename, |
1116 |
|
|
.link = fuse_link, |
1117 |
|
|
.setattr = fuse_setattr, |
1118 |
|
|
.permission = fuse_permission, |
1119 |
|
|
#ifdef KERNEL_2_6 |
1120 |
|
|
.getattr = fuse_getattr, |
1121 |
|
|
#else |
1122 |
|
|
.revalidate = fuse_revalidate, |
1123 |
|
|
#endif |
1124 |
|
|
#ifdef HAVE_KERNEL_XATTR |
1125 |
|
|
.setxattr = fuse_setxattr, |
1126 |
|
|
.getxattr = fuse_getxattr, |
1127 |
|
|
.listxattr = fuse_listxattr, |
1128 |
|
|
.removexattr = fuse_removexattr, |
1129 |
|
|
#endif |
1130 |
|
|
}; |
1131 |
|
|
|
1132 |
|
|
static struct file_operations fuse_dir_operations = { |
1133 |
|
|
.read = generic_read_dir, |
1134 |
|
|
.readdir = fuse_readdir, |
1135 |
|
|
.open = fuse_dir_open, |
1136 |
|
|
.release = fuse_dir_release, |
1137 |
|
|
}; |
1138 |
|
|
|
1139 |
|
|
static struct inode_operations fuse_file_inode_operations = { |
1140 |
|
|
.setattr = fuse_setattr, |
1141 |
|
|
.permission = fuse_permission, |
1142 |
|
|
#ifdef KERNEL_2_6 |
1143 |
|
|
.getattr = fuse_getattr, |
1144 |
|
|
#else |
1145 |
|
|
.revalidate = fuse_revalidate, |
1146 |
|
|
#endif |
1147 |
|
|
#ifdef HAVE_KERNEL_XATTR |
1148 |
|
|
.setxattr = fuse_setxattr, |
1149 |
|
|
.getxattr = fuse_getxattr, |
1150 |
|
|
.listxattr = fuse_listxattr, |
1151 |
|
|
.removexattr = fuse_removexattr, |
1152 |
|
|
#endif |
1153 |
|
|
}; |
1154 |
|
|
|
1155 |
|
|
static struct inode_operations fuse_symlink_inode_operations = |
1156 |
|
|
{ |
1157 |
|
|
.setattr = fuse_setattr, |
1158 |
|
|
.readlink = fuse_readlink, |
1159 |
|
|
.follow_link = fuse_follow_link, |
1160 |
|
|
#ifdef KERNEL_2_6 |
1161 |
|
|
.getattr = fuse_getattr, |
1162 |
|
|
#else |
1163 |
|
|
.revalidate = fuse_revalidate, |
1164 |
|
|
#endif |
1165 |
|
|
#ifdef HAVE_KERNEL_XATTR |
1166 |
|
|
.setxattr = fuse_setxattr, |
1167 |
|
|
.getxattr = fuse_getxattr, |
1168 |
|
|
.listxattr = fuse_listxattr, |
1169 |
|
|
.removexattr = fuse_removexattr, |
1170 |
|
|
#endif |
1171 |
|
|
}; |
1172 |
|
|
|
1173 |
|
|
static struct dentry_operations fuse_dentry_operations = { |
1174 |
|
|
.d_revalidate = fuse_dentry_revalidate, |
1175 |
|
|
}; |
1176 |
|
|
|
1177 |
|
|
/* |
1178 |
|
|
* Local Variables: |
1179 |
|
|
* indent-tabs-mode: t |
1180 |
|
|
* c-basic-offset: 8 |
1181 |
|
|
* End: |
1182 |
|
|
*/ |