Commit e14679b6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag '9p-for-5.7' of git://github.com/martinetd/linux 

Pull 9p updates from Dominique Martinet:
 "Not much new, but a few patches for this cycle:

   - Fix read with O_NONBLOCK to allow incomplete read and return
     immediately

   - Rest is just cleanup (indent, unused field in struct, extra
     semicolon)"

* tag '9p-for-5.7' of git://github.com/martinetd/linux:
  net/9p: remove unused p9_req_t aux field
  9p: read only once on O_NONBLOCK
  9pnet: allow making incomplete read requests
  9p: Remove unneeded semicolon
  9p: Fix Kconfig indentation
parents 77a73eec 43657496

fs/9p/vfs_file.c

+4 −1
Original line number Diff line number Diff line
@@ -388,6 +388,9 @@ v9fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) 
	p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n",

		 iov_iter_count(to), iocb->ki_pos);



	if (iocb->ki_filp->f_flags & O_NONBLOCK)

		ret = p9_client_read_once(fid, iocb->ki_pos, to, &err);

	else

		ret = p9_client_read(fid, iocb->ki_pos, to, &err);

	if (!ret)

		return err;

fs/9p/vfs_inode.c

+1 −1
Original line number Diff line number Diff line
@@ -143,7 +143,7 @@ static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, 
		default:

			p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n",

				 type, stat->extension);

		};

		}

		*rdev = MKDEV(major, minor);

	} else

		res |= S_IFREG;

include/net/9p/client.h

+2 −2
Original line number Diff line number Diff line
@@ -73,7 +73,6 @@ enum p9_req_status_t { 
 * @wq: wait_queue for the client to block on for this request

 * @tc: the request fcall structure

 * @rc: the response fcall structure

 * @aux: transport specific data (provided for trans_fd migration)

 * @req_list: link for higher level objects to chain requests

 */

struct p9_req_t {
@@ -83,7 +82,6 @@ struct p9_req_t { 
	wait_queue_head_t wq;

	struct p9_fcall tc;

	struct p9_fcall rc;

	void *aux;

	struct list_head req_list;

};
@@ -200,6 +198,8 @@ int p9_client_fsync(struct p9_fid *fid, int datasync); 
int p9_client_remove(struct p9_fid *fid);

int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags);

int p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err);

int p9_client_read_once(struct p9_fid *fid, u64 offset, struct iov_iter *to,

		int *err);

int p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err);

int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset);

int p9dirent_read(struct p9_client *clnt, char *buf, int len,

net/9p/client.c

+73 −61
Original line number Diff line number Diff line
@@ -1549,19 +1549,36 @@ EXPORT_SYMBOL(p9_client_unlinkat); 
int

p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err)

{

	struct p9_client *clnt = fid->clnt;

	struct p9_req_t *req;

	int total = 0;

	*err = 0;



	p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n",

		   fid->fid, (unsigned long long) offset, (int)iov_iter_count(to));



	while (iov_iter_count(to)) {

		int count;



		count = p9_client_read_once(fid, offset, to, err);

		if (!count || *err)

			break;

		offset += count;

		total += count;

	}

	return total;

}

EXPORT_SYMBOL(p9_client_read);



int

p9_client_read_once(struct p9_fid *fid, u64 offset, struct iov_iter *to,

		    int *err)

{

	struct p9_client *clnt = fid->clnt;

	struct p9_req_t *req;

	int count = iov_iter_count(to);

	int rsize, non_zc = 0;

	char *dataptr;



	*err = 0;

	p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n",

		   fid->fid, (unsigned long long) offset, (int)iov_iter_count(to));



	rsize = fid->iounit;

	if (!rsize || rsize > clnt->msize - P9_IOHDRSZ)

		rsize = clnt->msize - P9_IOHDRSZ;
@@ -1571,8 +1588,7 @@ p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) 


	/* Don't bother zerocopy for small IO (< 1024) */

	if (clnt->trans_mod->zc_request && rsize > 1024) {

			/*

			 * response header len is 11

		/* response header len is 11

		 * PDU Header(7) + IO Size (4)

		 */

		req = p9_client_zc_rpc(clnt, P9_TREAD, to, NULL, rsize,
@@ -1585,7 +1601,7 @@ p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) 
	}

	if (IS_ERR(req)) {

		*err = PTR_ERR(req);

			break;

		return 0;

	}



	*err = p9pdu_readf(&req->rc, clnt->proto_version,
@@ -1593,7 +1609,7 @@ p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) 
	if (*err) {

		trace_9p_protocol_dump(clnt, &req->rc);

		p9_tag_remove(clnt, req);

			break;

		return 0;

	}

	if (rsize < count) {

		pr_err("bogus RREAD count (%d > %d)\n", count, rsize);
@@ -1603,28 +1619,24 @@ p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) 
	p9_debug(P9_DEBUG_9P, "<<< RREAD count %d\n", count);

	if (!count) {

		p9_tag_remove(clnt, req);

			break;

		return 0;

	}



	if (non_zc) {

		int n = copy_to_iter(dataptr, count, to);

			total += n;

			offset += n;



		if (n != count) {

			*err = -EFAULT;

			p9_tag_remove(clnt, req);

				break;

			return n;

		}

	} else {

		iov_iter_advance(to, count);

			total += count;

			offset += count;

	}

	p9_tag_remove(clnt, req);

	return count;

}

	return total;

}

EXPORT_SYMBOL(p9_client_read);

EXPORT_SYMBOL(p9_client_read_once);



int

p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err)

fs/9p/Kconfig

+10 −10

File changed.

Contains only whitespace changes.

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