pnfsblock: basic extent code (9e692969) · Commits · e / devices / android_kernel_xiaomi_markw

fs/nfs/blocklayout/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,4 +2,4 @@
		# Makefile for the pNFS block layout driver kernel module
		#
		obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
		blocklayoutdriver-objs := blocklayout.o
		blocklayoutdriver-objs := blocklayout.o extents.o

fs/nfs/blocklayout/blocklayout.c

+16 −4

Original line number	Diff line number	Diff line
		@@ -53,12 +53,24 @@ bl_write_pagelist(struct nfs_write_data *wdata,
		return PNFS_NOT_ATTEMPTED;
		}

		/* STUB */
		/* FIXME - range ignored */
		static void
		release_extents(struct pnfs_block_layout *bl,
		struct pnfs_layout_range *range)
		release_extents(struct pnfs_block_layout bl, struct pnfs_layout_range range)
		{
		return;
		int i;
		struct pnfs_block_extent *be;

		spin_lock(&bl->bl_ext_lock);
		for (i = 0; i < EXTENT_LISTS; i++) {
		while (!list_empty(&bl->bl_extents[i])) {
		be = list_first_entry(&bl->bl_extents[i],
		struct pnfs_block_extent,
		be_node);
		list_del(&be->be_node);
		bl_put_extent(be);
		}
		}
		spin_unlock(&bl->bl_ext_lock);
		}

		/* STUB */

fs/nfs/blocklayout/blocklayout.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -88,4 +88,5 @@ static inline struct pnfs_block_layout BLK_LO2EXT(struct pnfs_layout_hdr lo)
		return container_of(lo, struct pnfs_block_layout, bl_layout);
		}

		void bl_put_extent(struct pnfs_block_extent *be);
		#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */

fs/nfs/blocklayout/extents.c

0 → 100644

+89 −0

Original line number	Diff line number	Diff line
		/*
		* linux/fs/nfs/blocklayout/blocklayout.h
		*
		* Module for the NFSv4.1 pNFS block layout driver.
		*
		* Copyright (c) 2006 The Regents of the University of Michigan.
		* All rights reserved.
		*
		* Andy Adamson <andros@citi.umich.edu>
		* Fred Isaman <iisaman@umich.edu>
		*
		* permission is granted to use, copy, create derivative works and
		* redistribute this software and such derivative works for any purpose,
		* so long as the name of the university of michigan is not used in
		* any advertising or publicity pertaining to the use or distribution
		* of this software without specific, written prior authorization. if
		* the above copyright notice or any other identification of the
		* university of michigan is included in any copy of any portion of
		* this software, then the disclaimer below must also be included.
		*
		* this software is provided as is, without representation from the
		* university of michigan as to its fitness for any purpose, and without
		* warranty by the university of michigan of any kind, either express
		* or implied, including without limitation the implied warranties of
		* merchantability and fitness for a particular purpose. the regents
		* of the university of michigan shall not be liable for any damages,
		* including special, indirect, incidental, or consequential damages,
		* with respect to any claim arising out or in connection with the use
		* of the software, even if it has been or is hereafter advised of the
		* possibility of such damages.
		*/

		#include "blocklayout.h"
		#define NFSDBG_FACILITY NFSDBG_PNFS_LD

		static void print_bl_extent(struct pnfs_block_extent *be)
		{
		dprintk("PRINT EXTENT extent %p\n", be);
		if (be) {
		dprintk(" be_f_offset %llu\n", (u64)be->be_f_offset);
		dprintk(" be_length %llu\n", (u64)be->be_length);
		dprintk(" be_v_offset %llu\n", (u64)be->be_v_offset);
		dprintk(" be_state %d\n", be->be_state);
		}
		}

		static void
		destroy_extent(struct kref *kref)
		{
		struct pnfs_block_extent *be;

		be = container_of(kref, struct pnfs_block_extent, be_refcnt);
		dprintk("%s be=%p\n", __func__, be);
		kfree(be);
		}

		void
		bl_put_extent(struct pnfs_block_extent *be)
		{
		if (be) {
		dprintk("%s enter %p (%i)\n", __func__, be,
		atomic_read(&be->be_refcnt.refcount));
		kref_put(&be->be_refcnt, destroy_extent);
		}
		}

		struct pnfs_block_extent *bl_alloc_extent(void)
		{
		struct pnfs_block_extent *be;

		be = kmalloc(sizeof(struct pnfs_block_extent), GFP_NOFS);
		if (!be)
		return NULL;
		INIT_LIST_HEAD(&be->be_node);
		kref_init(&be->be_refcnt);
		be->be_inval = NULL;
		return be;
		}

		static void print_elist(struct list_head *list)
		{
		struct pnfs_block_extent *be;
		dprintk("****************\n");
		dprintk("Extent list looks like:\n");
		list_for_each_entry(be, list, be_node) {
		print_bl_extent(be);
		}
		dprintk("****************\n");
		}