mirror of https://gitee.com/openkylin/linux.git
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
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/*
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* linux/fs/nfs/blocklayout/blocklayout.h
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*
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* Module for the NFSv4.1 pNFS block layout driver.
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*
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* Copyright (c) 2006 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Andy Adamson <andros@citi.umich.edu>
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* Fred Isaman <iisaman@umich.edu>
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*
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* permission is granted to use, copy, create derivative works and
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* redistribute this software and such derivative works for any purpose,
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* so long as the name of the university of michigan is not used in
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* any advertising or publicity pertaining to the use or distribution
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* of this software without specific, written prior authorization. if
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* the above copyright notice or any other identification of the
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* university of michigan is included in any copy of any portion of
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* this software, then the disclaimer below must also be included.
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*
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* this software is provided as is, without representation from the
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* university of michigan as to its fitness for any purpose, and without
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* warranty by the university of michigan of any kind, either express
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* or implied, including without limitation the implied warranties of
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* merchantability and fitness for a particular purpose. the regents
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* of the university of michigan shall not be liable for any damages,
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* including special, indirect, incidental, or consequential damages,
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* with respect to any claim arising out or in connection with the use
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* of the software, even if it has been or is hereafter advised of the
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* possibility of such damages.
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*/
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#include "blocklayout.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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static void print_bl_extent(struct pnfs_block_extent *be)
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{
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dprintk("PRINT EXTENT extent %p\n", be);
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if (be) {
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dprintk(" be_f_offset %llu\n", (u64)be->be_f_offset);
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dprintk(" be_length %llu\n", (u64)be->be_length);
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dprintk(" be_v_offset %llu\n", (u64)be->be_v_offset);
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dprintk(" be_state %d\n", be->be_state);
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}
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}
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static void
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destroy_extent(struct kref *kref)
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{
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struct pnfs_block_extent *be;
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be = container_of(kref, struct pnfs_block_extent, be_refcnt);
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dprintk("%s be=%p\n", __func__, be);
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kfree(be);
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}
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void
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bl_put_extent(struct pnfs_block_extent *be)
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{
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if (be) {
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dprintk("%s enter %p (%i)\n", __func__, be,
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atomic_read(&be->be_refcnt.refcount));
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kref_put(&be->be_refcnt, destroy_extent);
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}
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}
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struct pnfs_block_extent *bl_alloc_extent(void)
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{
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struct pnfs_block_extent *be;
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be = kmalloc(sizeof(struct pnfs_block_extent), GFP_NOFS);
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if (!be)
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return NULL;
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INIT_LIST_HEAD(&be->be_node);
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kref_init(&be->be_refcnt);
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be->be_inval = NULL;
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return be;
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}
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static void print_elist(struct list_head *list)
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{
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struct pnfs_block_extent *be;
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dprintk("****************\n");
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dprintk("Extent list looks like:\n");
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list_for_each_entry(be, list, be_node) {
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print_bl_extent(be);
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}
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dprintk("****************\n");
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}
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