diff options
| -rw-r--r-- | fs/fuse/dir.c | 2 | ||||
| -rw-r--r-- | fs/fuse/file.c | 37 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 3 | ||||
| -rw-r--r-- | include/linux/fuse.h | 11 |
4 files changed, 53 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 677f3ed7f98..1cabdb229ad 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1024,6 +1024,8 @@ static int fuse_setattr(struct dentry *entry, struct iattr *attr) if (attr->ia_valid & ATTR_SIZE) { unsigned long limit; is_truncate = 1; + if (IS_SWAPFILE(inode)) + return -ETXTBSY; limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) { send_sig(SIGXFSZ, current, 0); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 763a50daf1c..128f79c4080 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -754,6 +754,42 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl) return err; } +static sector_t fuse_bmap(struct address_space *mapping, sector_t block) +{ + struct inode *inode = mapping->host; + struct fuse_conn *fc = get_fuse_conn(inode); + struct fuse_req *req; + struct fuse_bmap_in inarg; + struct fuse_bmap_out outarg; + int err; + + if (!inode->i_sb->s_bdev || fc->no_bmap) + return 0; + + req = fuse_get_req(fc); + if (IS_ERR(req)) + return 0; + + memset(&inarg, 0, sizeof(inarg)); + inarg.block = block; + inarg.blocksize = inode->i_sb->s_blocksize; + req->in.h.opcode = FUSE_BMAP; + req->in.h.nodeid = get_node_id(inode); + 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; + fuse_put_request(fc, req); + if (err == -ENOSYS) + fc->no_bmap = 1; + + return err ? 0 : outarg.block; +} + static const struct file_operations fuse_file_operations = { .llseek = generic_file_llseek, .read = do_sync_read, @@ -787,6 +823,7 @@ static const struct address_space_operations fuse_file_aops = { .commit_write = fuse_commit_write, .readpages = fuse_readpages, .set_page_dirty = fuse_set_page_dirty, + .bmap = fuse_bmap, }; void fuse_init_file_inode(struct inode *inode) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 91edb8932d9..58d482d9f6b 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -339,6 +339,9 @@ struct fuse_conn { /** Is interrupt not implemented by fs? */ unsigned no_interrupt : 1; + /** Is bmap not implemented by fs? */ + unsigned no_bmap : 1; + /** The number of requests waiting for completion */ atomic_t num_waiting; diff --git a/include/linux/fuse.h b/include/linux/fuse.h index 76336327a94..162a754f4db 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -132,6 +132,7 @@ enum fuse_opcode { FUSE_ACCESS = 34, FUSE_CREATE = 35, FUSE_INTERRUPT = 36, + FUSE_BMAP = 37, }; /* The read buffer is required to be at least 8k, but may be much larger */ @@ -302,6 +303,16 @@ struct fuse_interrupt_in { __u64 unique; }; +struct fuse_bmap_in { + __u64 block; + __u32 blocksize; + __u32 padding; +}; + +struct fuse_bmap_out { + __u64 block; +}; + struct fuse_in_header { __u32 len; __u32 opcode; |