diff options
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dev.c | 25 | ||||
| -rw-r--r-- | fs/fuse/dir.c | 14 | ||||
| -rw-r--r-- | fs/fuse/file.c | 44 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 5 |
4 files changed, 56 insertions, 32 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index ef74ad5..0a648bb 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -1296,22 +1296,6 @@ static ssize_t fuse_dev_read(struct kiocb *iocb, const struct iovec *iov, return fuse_dev_do_read(fc, file, &cs, iov_length(iov, nr_segs)); } -static int fuse_dev_pipe_buf_steal(struct pipe_inode_info *pipe, - struct pipe_buffer *buf) -{ - return 1; -} - -static const struct pipe_buf_operations fuse_dev_pipe_buf_ops = { - .can_merge = 0, - .map = generic_pipe_buf_map, - .unmap = generic_pipe_buf_unmap, - .confirm = generic_pipe_buf_confirm, - .release = generic_pipe_buf_release, - .steal = fuse_dev_pipe_buf_steal, - .get = generic_pipe_buf_get, -}; - static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe, size_t len, unsigned int flags) @@ -1358,7 +1342,11 @@ static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos, buf->page = bufs[page_nr].page; buf->offset = bufs[page_nr].offset; buf->len = bufs[page_nr].len; - buf->ops = &fuse_dev_pipe_buf_ops; + /* + * Need to be careful about this. Having buf->ops in module + * code can Oops if the buffer persists after module unload. + */ + buf->ops = &nosteal_pipe_buf_ops; pipe->nrbufs++; page_nr++; @@ -1599,7 +1587,8 @@ static int fuse_notify_store(struct fuse_conn *fc, unsigned int size, this_num = min_t(unsigned, num, PAGE_CACHE_SIZE - offset); err = fuse_copy_page(cs, &page, offset, this_num, 0); - if (!err && offset == 0 && (num != 0 || file_size == end)) + if (!err && offset == 0 && + (this_num == PAGE_CACHE_SIZE || file_size == end)) SetPageUptodate(page); unlock_page(page); page_cache_release(page); diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index c3eb2c4..1d1292c 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -112,6 +112,16 @@ void fuse_invalidate_attr(struct inode *inode) get_fuse_inode(inode)->i_time = 0; } +/** + * Mark the attributes as stale due to an atime change. Avoid the invalidate if + * atime is not used. + */ +void fuse_invalidate_atime(struct inode *inode) +{ + if (!IS_RDONLY(inode)) + fuse_invalidate_attr(inode); +} + /* * Just mark the entry as stale, so that a next attempt to look it up * will result in a new lookup call to userspace @@ -1371,7 +1381,7 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx) } __free_page(page); - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); return err; } @@ -1404,7 +1414,7 @@ static char *read_link(struct dentry *dentry) link[req->out.args[0].size] = '\0'; out: fuse_put_request(fc, req); - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); return link; } diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 7e70506..77bcc30 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -127,7 +127,15 @@ static void fuse_file_put(struct fuse_file *ff, bool sync) if (atomic_dec_and_test(&ff->count)) { struct fuse_req *req = ff->reserved_req; - if (sync) { + if (ff->fc->no_open) { + /* + * Drop the release request when client does not + * implement 'open' + */ + req->background = 0; + path_put(&req->misc.release.path); + fuse_put_request(ff->fc, req); + } else if (sync) { req->background = 0; fuse_request_send(ff->fc, req); path_put(&req->misc.release.path); @@ -144,27 +152,36 @@ static void fuse_file_put(struct fuse_file *ff, bool sync) int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, bool isdir) { - struct fuse_open_out outarg; struct fuse_file *ff; - int err; int opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN; ff = fuse_file_alloc(fc); if (!ff) return -ENOMEM; - err = fuse_send_open(fc, nodeid, file, opcode, &outarg); - if (err) { - fuse_file_free(ff); - return err; + ff->fh = 0; + ff->open_flags = FOPEN_KEEP_CACHE; /* Default for no-open */ + if (!fc->no_open || isdir) { + struct fuse_open_out outarg; + int err; + + err = fuse_send_open(fc, nodeid, file, opcode, &outarg); + if (!err) { + ff->fh = outarg.fh; + ff->open_flags = outarg.open_flags; + + } else if (err != -ENOSYS || isdir) { + fuse_file_free(ff); + return err; + } else { + fc->no_open = 1; + } } if (isdir) - outarg.open_flags &= ~FOPEN_DIRECT_IO; + ff->open_flags &= ~FOPEN_DIRECT_IO; - ff->fh = outarg.fh; ff->nodeid = nodeid; - ff->open_flags = outarg.open_flags; file->private_data = fuse_file_get(ff); return 0; @@ -687,7 +704,7 @@ static int fuse_readpage(struct file *file, struct page *page) SetPageUptodate(page); } - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); out: unlock_page(page); return err; @@ -716,7 +733,7 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_req *req) fuse_read_update_size(inode, pos, req->misc.read.attr_ver); } - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); } for (i = 0; i < req->num_pages; i++) { @@ -2710,6 +2727,9 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, inode = file->f_mapping->host; i_size = i_size_read(inode); + if ((rw == READ) && (offset > i_size)) + return 0; + /* optimization for short read */ if (async_dio && rw != WRITE && offset + count > i_size) { if (offset >= i_size) diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 7d27309..2da5db2 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -485,6 +485,9 @@ struct fuse_conn { * and hence races in setting them will not cause malfunction */ + /** Is open/release not implemented by fs? */ + unsigned no_open:1; + /** Is fsync not implemented by fs? */ unsigned no_fsync:1; @@ -788,6 +791,8 @@ void fuse_invalidate_attr(struct inode *inode); void fuse_invalidate_entry_cache(struct dentry *entry); +void fuse_invalidate_atime(struct inode *inode); + /** * Acquire reference to fuse_conn */ |
