diff options
Diffstat (limited to 'fs/fuse/file.c')
-rw-r--r-- | fs/fuse/file.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 763a50daf1c0..128f79c40803 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) | |||
754 | return err; | 754 | return err; |
755 | } | 755 | } |
756 | 756 | ||
757 | static sector_t fuse_bmap(struct address_space *mapping, sector_t block) | ||
758 | { | ||
759 | struct inode *inode = mapping->host; | ||
760 | struct fuse_conn *fc = get_fuse_conn(inode); | ||
761 | struct fuse_req *req; | ||
762 | struct fuse_bmap_in inarg; | ||
763 | struct fuse_bmap_out outarg; | ||
764 | int err; | ||
765 | |||
766 | if (!inode->i_sb->s_bdev || fc->no_bmap) | ||
767 | return 0; | ||
768 | |||
769 | req = fuse_get_req(fc); | ||
770 | if (IS_ERR(req)) | ||
771 | return 0; | ||
772 | |||
773 | memset(&inarg, 0, sizeof(inarg)); | ||
774 | inarg.block = block; | ||
775 | inarg.blocksize = inode->i_sb->s_blocksize; | ||
776 | req->in.h.opcode = FUSE_BMAP; | ||
777 | req->in.h.nodeid = get_node_id(inode); | ||
778 | req->in.numargs = 1; | ||
779 | req->in.args[0].size = sizeof(inarg); | ||
780 | req->in.args[0].value = &inarg; | ||
781 | req->out.numargs = 1; | ||
782 | req->out.args[0].size = sizeof(outarg); | ||
783 | req->out.args[0].value = &outarg; | ||
784 | request_send(fc, req); | ||
785 | err = req->out.h.error; | ||
786 | fuse_put_request(fc, req); | ||
787 | if (err == -ENOSYS) | ||
788 | fc->no_bmap = 1; | ||
789 | |||
790 | return err ? 0 : outarg.block; | ||
791 | } | ||
792 | |||
757 | static const struct file_operations fuse_file_operations = { | 793 | static const struct file_operations fuse_file_operations = { |
758 | .llseek = generic_file_llseek, | 794 | .llseek = generic_file_llseek, |
759 | .read = do_sync_read, | 795 | .read = do_sync_read, |
@@ -787,6 +823,7 @@ static const struct address_space_operations fuse_file_aops = { | |||
787 | .commit_write = fuse_commit_write, | 823 | .commit_write = fuse_commit_write, |
788 | .readpages = fuse_readpages, | 824 | .readpages = fuse_readpages, |
789 | .set_page_dirty = fuse_set_page_dirty, | 825 | .set_page_dirty = fuse_set_page_dirty, |
826 | .bmap = fuse_bmap, | ||
790 | }; | 827 | }; |
791 | 828 | ||
792 | void fuse_init_file_inode(struct inode *inode) | 829 | void fuse_init_file_inode(struct inode *inode) |