2011-07-31 08:52:39 +08:00
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/*
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* linux/fs/nfs/blocklayout/blocklayout.c
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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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2011-07-31 08:52:53 +08:00
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2011-07-31 08:52:39 +08:00
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#include <linux/module.h>
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#include <linux/init.h>
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2011-07-31 08:52:42 +08:00
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#include <linux/mount.h>
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#include <linux/namei.h>
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2011-07-31 08:52:53 +08:00
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#include <linux/bio.h> /* struct bio */
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2011-07-31 08:52:39 +08:00
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#include "blocklayout.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Andy Adamson <andros@citi.umich.edu>");
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MODULE_DESCRIPTION("The NFSv4.1 pNFS Block layout driver");
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2011-07-31 08:52:42 +08:00
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struct dentry *bl_device_pipe;
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wait_queue_head_t bl_wq;
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2011-07-31 08:52:53 +08:00
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static void print_page(struct page *page)
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{
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dprintk("PRINTPAGE page %p\n", page);
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dprintk(" PagePrivate %d\n", PagePrivate(page));
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dprintk(" PageUptodate %d\n", PageUptodate(page));
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dprintk(" PageError %d\n", PageError(page));
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dprintk(" PageDirty %d\n", PageDirty(page));
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dprintk(" PageReferenced %d\n", PageReferenced(page));
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dprintk(" PageLocked %d\n", PageLocked(page));
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dprintk(" PageWriteback %d\n", PageWriteback(page));
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dprintk(" PageMappedToDisk %d\n", PageMappedToDisk(page));
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dprintk("\n");
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}
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/* Given the be associated with isect, determine if page data needs to be
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* initialized.
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*/
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static int is_hole(struct pnfs_block_extent *be, sector_t isect)
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{
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if (be->be_state == PNFS_BLOCK_NONE_DATA)
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return 1;
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else if (be->be_state != PNFS_BLOCK_INVALID_DATA)
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return 0;
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else
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return !bl_is_sector_init(be->be_inval, isect);
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}
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2011-07-31 08:52:54 +08:00
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/* Given the be associated with isect, determine if page data can be
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* written to disk.
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*/
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static int is_writable(struct pnfs_block_extent *be, sector_t isect)
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{
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if (be->be_state == PNFS_BLOCK_READWRITE_DATA)
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return 1;
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else if (be->be_state != PNFS_BLOCK_INVALID_DATA)
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return 0;
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else
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return bl_is_sector_init(be->be_inval, isect);
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}
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2011-07-31 08:52:53 +08:00
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/* The data we are handed might be spread across several bios. We need
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* to track when the last one is finished.
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*/
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struct parallel_io {
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struct kref refcnt;
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struct rpc_call_ops call_ops;
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void (*pnfs_callback) (void *data);
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void *data;
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};
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static inline struct parallel_io *alloc_parallel(void *data)
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{
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struct parallel_io *rv;
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rv = kmalloc(sizeof(*rv), GFP_NOFS);
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if (rv) {
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rv->data = data;
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kref_init(&rv->refcnt);
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}
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return rv;
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}
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static inline void get_parallel(struct parallel_io *p)
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{
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kref_get(&p->refcnt);
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}
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static void destroy_parallel(struct kref *kref)
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{
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struct parallel_io *p = container_of(kref, struct parallel_io, refcnt);
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dprintk("%s enter\n", __func__);
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p->pnfs_callback(p->data);
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kfree(p);
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}
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static inline void put_parallel(struct parallel_io *p)
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{
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kref_put(&p->refcnt, destroy_parallel);
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}
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static struct bio *
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bl_submit_bio(int rw, struct bio *bio)
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{
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if (bio) {
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get_parallel(bio->bi_private);
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dprintk("%s submitting %s bio %u@%llu\n", __func__,
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rw == READ ? "read" : "write",
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bio->bi_size, (unsigned long long)bio->bi_sector);
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submit_bio(rw, bio);
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}
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return NULL;
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}
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static struct bio *bl_alloc_init_bio(int npg, sector_t isect,
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struct pnfs_block_extent *be,
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void (*end_io)(struct bio *, int err),
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struct parallel_io *par)
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{
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struct bio *bio;
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bio = bio_alloc(GFP_NOIO, npg);
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if (!bio)
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return NULL;
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bio->bi_sector = isect - be->be_f_offset + be->be_v_offset;
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bio->bi_bdev = be->be_mdev;
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bio->bi_end_io = end_io;
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bio->bi_private = par;
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return bio;
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}
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static struct bio *bl_add_page_to_bio(struct bio *bio, int npg, int rw,
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sector_t isect, struct page *page,
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struct pnfs_block_extent *be,
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void (*end_io)(struct bio *, int err),
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struct parallel_io *par)
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{
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retry:
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if (!bio) {
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bio = bl_alloc_init_bio(npg, isect, be, end_io, par);
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if (!bio)
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return ERR_PTR(-ENOMEM);
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}
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if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) {
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bio = bl_submit_bio(rw, bio);
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goto retry;
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}
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return bio;
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}
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static void bl_set_lo_fail(struct pnfs_layout_segment *lseg)
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{
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if (lseg->pls_range.iomode == IOMODE_RW) {
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dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__);
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set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
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} else {
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dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__);
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set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
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}
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}
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/* This is basically copied from mpage_end_io_read */
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static void bl_end_io_read(struct bio *bio, int err)
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{
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struct parallel_io *par = bio->bi_private;
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const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
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struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
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struct nfs_read_data *rdata = (struct nfs_read_data *)par->data;
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do {
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struct page *page = bvec->bv_page;
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if (--bvec >= bio->bi_io_vec)
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prefetchw(&bvec->bv_page->flags);
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if (uptodate)
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SetPageUptodate(page);
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} while (bvec >= bio->bi_io_vec);
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if (!uptodate) {
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if (!rdata->pnfs_error)
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rdata->pnfs_error = -EIO;
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bl_set_lo_fail(rdata->lseg);
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}
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bio_put(bio);
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put_parallel(par);
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}
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static void bl_read_cleanup(struct work_struct *work)
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{
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struct rpc_task *task;
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struct nfs_read_data *rdata;
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dprintk("%s enter\n", __func__);
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task = container_of(work, struct rpc_task, u.tk_work);
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rdata = container_of(task, struct nfs_read_data, task);
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pnfs_ld_read_done(rdata);
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}
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static void
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bl_end_par_io_read(void *data)
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{
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struct nfs_read_data *rdata = data;
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INIT_WORK(&rdata->task.u.tk_work, bl_read_cleanup);
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schedule_work(&rdata->task.u.tk_work);
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}
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/* We don't want normal .rpc_call_done callback used, so we replace it
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* with this stub.
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*/
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static void bl_rpc_do_nothing(struct rpc_task *task, void *calldata)
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{
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return;
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}
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2011-07-31 08:52:39 +08:00
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static enum pnfs_try_status
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bl_read_pagelist(struct nfs_read_data *rdata)
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{
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2011-07-31 08:52:53 +08:00
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int i, hole;
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struct bio *bio = NULL;
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struct pnfs_block_extent *be = NULL, *cow_read = NULL;
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sector_t isect, extent_length = 0;
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struct parallel_io *par;
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loff_t f_offset = rdata->args.offset;
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size_t count = rdata->args.count;
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struct page **pages = rdata->args.pages;
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int pg_index = rdata->args.pgbase >> PAGE_CACHE_SHIFT;
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dprintk("%s enter nr_pages %u offset %lld count %Zd\n", __func__,
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rdata->npages, f_offset, count);
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par = alloc_parallel(rdata);
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if (!par)
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goto use_mds;
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par->call_ops = *rdata->mds_ops;
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par->call_ops.rpc_call_done = bl_rpc_do_nothing;
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par->pnfs_callback = bl_end_par_io_read;
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/* At this point, we can no longer jump to use_mds */
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isect = (sector_t) (f_offset >> SECTOR_SHIFT);
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/* Code assumes extents are page-aligned */
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for (i = pg_index; i < rdata->npages; i++) {
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if (!extent_length) {
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/* We've used up the previous extent */
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bl_put_extent(be);
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bl_put_extent(cow_read);
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bio = bl_submit_bio(READ, bio);
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/* Get the next one */
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be = bl_find_get_extent(BLK_LSEG2EXT(rdata->lseg),
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isect, &cow_read);
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if (!be) {
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rdata->pnfs_error = -EIO;
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goto out;
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}
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extent_length = be->be_length -
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(isect - be->be_f_offset);
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if (cow_read) {
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sector_t cow_length = cow_read->be_length -
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(isect - cow_read->be_f_offset);
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extent_length = min(extent_length, cow_length);
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}
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}
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hole = is_hole(be, isect);
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if (hole && !cow_read) {
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bio = bl_submit_bio(READ, bio);
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/* Fill hole w/ zeroes w/o accessing device */
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dprintk("%s Zeroing page for hole\n", __func__);
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zero_user_segment(pages[i], 0, PAGE_CACHE_SIZE);
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print_page(pages[i]);
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SetPageUptodate(pages[i]);
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} else {
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struct pnfs_block_extent *be_read;
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be_read = (hole && cow_read) ? cow_read : be;
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bio = bl_add_page_to_bio(bio, rdata->npages - i, READ,
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isect, pages[i], be_read,
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bl_end_io_read, par);
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if (IS_ERR(bio)) {
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rdata->pnfs_error = PTR_ERR(bio);
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goto out;
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}
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}
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isect += PAGE_CACHE_SECTORS;
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extent_length -= PAGE_CACHE_SECTORS;
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}
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if ((isect << SECTOR_SHIFT) >= rdata->inode->i_size) {
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rdata->res.eof = 1;
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rdata->res.count = rdata->inode->i_size - f_offset;
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} else {
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rdata->res.count = (isect << SECTOR_SHIFT) - f_offset;
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}
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out:
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bl_put_extent(be);
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bl_put_extent(cow_read);
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bl_submit_bio(READ, bio);
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put_parallel(par);
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return PNFS_ATTEMPTED;
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use_mds:
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dprintk("Giving up and using normal NFS\n");
|
2011-07-31 08:52:39 +08:00
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return PNFS_NOT_ATTEMPTED;
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}
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|
2011-07-31 08:52:55 +08:00
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|
|
static void mark_extents_written(struct pnfs_block_layout *bl,
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__u64 offset, __u32 count)
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{
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sector_t isect, end;
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|
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struct pnfs_block_extent *be;
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dprintk("%s(%llu, %u)\n", __func__, offset, count);
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if (count == 0)
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return;
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isect = (offset & (long)(PAGE_CACHE_MASK)) >> SECTOR_SHIFT;
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end = (offset + count + PAGE_CACHE_SIZE - 1) & (long)(PAGE_CACHE_MASK);
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end >>= SECTOR_SHIFT;
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while (isect < end) {
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|
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sector_t len;
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be = bl_find_get_extent(bl, isect, NULL);
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|
|
BUG_ON(!be); /* FIXME */
|
|
|
|
len = min(end, be->be_f_offset + be->be_length) - isect;
|
|
|
|
if (be->be_state == PNFS_BLOCK_INVALID_DATA)
|
|
|
|
bl_mark_for_commit(be, isect, len); /* What if fails? */
|
|
|
|
isect += len;
|
|
|
|
bl_put_extent(be);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:54 +08:00
|
|
|
/* This is basically copied from mpage_end_io_read */
|
|
|
|
static void bl_end_io_write(struct bio *bio, int err)
|
|
|
|
{
|
|
|
|
struct parallel_io *par = bio->bi_private;
|
|
|
|
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
|
|
|
|
struct nfs_write_data *wdata = (struct nfs_write_data *)par->data;
|
|
|
|
|
|
|
|
if (!uptodate) {
|
|
|
|
if (!wdata->pnfs_error)
|
|
|
|
wdata->pnfs_error = -EIO;
|
|
|
|
bl_set_lo_fail(wdata->lseg);
|
|
|
|
}
|
|
|
|
bio_put(bio);
|
|
|
|
put_parallel(par);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Function scheduled for call during bl_end_par_io_write,
|
|
|
|
* it marks sectors as written and extends the commitlist.
|
|
|
|
*/
|
|
|
|
static void bl_write_cleanup(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct rpc_task *task;
|
|
|
|
struct nfs_write_data *wdata;
|
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
task = container_of(work, struct rpc_task, u.tk_work);
|
|
|
|
wdata = container_of(task, struct nfs_write_data, task);
|
2011-07-31 08:52:55 +08:00
|
|
|
if (!wdata->task.tk_status) {
|
|
|
|
/* Marks for LAYOUTCOMMIT */
|
|
|
|
/* BUG - this should be called after each bio, not after
|
|
|
|
* all finish, unless have some way of storing success/failure
|
|
|
|
*/
|
|
|
|
mark_extents_written(BLK_LSEG2EXT(wdata->lseg),
|
|
|
|
wdata->args.offset, wdata->args.count);
|
|
|
|
}
|
2011-07-31 08:52:54 +08:00
|
|
|
pnfs_ld_write_done(wdata);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called when last of bios associated with a bl_write_pagelist call finishes */
|
|
|
|
static void
|
|
|
|
bl_end_par_io_write(void *data)
|
|
|
|
{
|
|
|
|
struct nfs_write_data *wdata = data;
|
|
|
|
|
|
|
|
/* STUB - ignoring error handling */
|
|
|
|
wdata->task.tk_status = 0;
|
|
|
|
wdata->verf.committed = NFS_FILE_SYNC;
|
|
|
|
INIT_WORK(&wdata->task.u.tk_work, bl_write_cleanup);
|
|
|
|
schedule_work(&wdata->task.u.tk_work);
|
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
static enum pnfs_try_status
|
2011-07-31 08:52:54 +08:00
|
|
|
bl_write_pagelist(struct nfs_write_data *wdata, int sync)
|
2011-07-31 08:52:39 +08:00
|
|
|
{
|
2011-07-31 08:52:54 +08:00
|
|
|
int i;
|
|
|
|
struct bio *bio = NULL;
|
|
|
|
struct pnfs_block_extent *be = NULL;
|
|
|
|
sector_t isect, extent_length = 0;
|
|
|
|
struct parallel_io *par;
|
|
|
|
loff_t offset = wdata->args.offset;
|
|
|
|
size_t count = wdata->args.count;
|
|
|
|
struct page **pages = wdata->args.pages;
|
|
|
|
int pg_index = wdata->args.pgbase >> PAGE_CACHE_SHIFT;
|
|
|
|
|
|
|
|
dprintk("%s enter, %Zu@%lld\n", __func__, count, offset);
|
|
|
|
/* At this point, wdata->pages is a (sequential) list of nfs_pages.
|
|
|
|
* We want to write each, and if there is an error remove it from
|
|
|
|
* list and call
|
|
|
|
* nfs_retry_request(req) to have it redone using nfs.
|
|
|
|
* QUEST? Do as block or per req? Think have to do per block
|
|
|
|
* as part of end_bio
|
|
|
|
*/
|
|
|
|
par = alloc_parallel(wdata);
|
|
|
|
if (!par)
|
|
|
|
return PNFS_NOT_ATTEMPTED;
|
|
|
|
par->call_ops = *wdata->mds_ops;
|
|
|
|
par->call_ops.rpc_call_done = bl_rpc_do_nothing;
|
|
|
|
par->pnfs_callback = bl_end_par_io_write;
|
|
|
|
/* At this point, have to be more careful with error handling */
|
|
|
|
|
|
|
|
isect = (sector_t) ((offset & (long)PAGE_CACHE_MASK) >> SECTOR_SHIFT);
|
|
|
|
for (i = pg_index; i < wdata->npages ; i++) {
|
|
|
|
if (!extent_length) {
|
|
|
|
/* We've used up the previous extent */
|
|
|
|
bl_put_extent(be);
|
|
|
|
bio = bl_submit_bio(WRITE, bio);
|
|
|
|
/* Get the next one */
|
|
|
|
be = bl_find_get_extent(BLK_LSEG2EXT(wdata->lseg),
|
|
|
|
isect, NULL);
|
|
|
|
if (!be || !is_writable(be, isect)) {
|
|
|
|
wdata->pnfs_error = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
extent_length = be->be_length -
|
|
|
|
(isect - be->be_f_offset);
|
|
|
|
}
|
|
|
|
for (;;) {
|
|
|
|
if (!bio) {
|
|
|
|
bio = bio_alloc(GFP_NOIO, wdata->npages - i);
|
|
|
|
if (!bio) {
|
|
|
|
wdata->pnfs_error = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
bio->bi_sector = isect - be->be_f_offset +
|
|
|
|
be->be_v_offset;
|
|
|
|
bio->bi_bdev = be->be_mdev;
|
|
|
|
bio->bi_end_io = bl_end_io_write;
|
|
|
|
bio->bi_private = par;
|
|
|
|
}
|
|
|
|
if (bio_add_page(bio, pages[i], PAGE_SIZE, 0))
|
|
|
|
break;
|
|
|
|
bio = bl_submit_bio(WRITE, bio);
|
|
|
|
}
|
|
|
|
isect += PAGE_CACHE_SECTORS;
|
|
|
|
extent_length -= PAGE_CACHE_SECTORS;
|
|
|
|
}
|
|
|
|
wdata->res.count = (isect << SECTOR_SHIFT) - (offset);
|
|
|
|
if (count < wdata->res.count)
|
|
|
|
wdata->res.count = count;
|
|
|
|
out:
|
|
|
|
bl_put_extent(be);
|
|
|
|
bl_submit_bio(WRITE, bio);
|
|
|
|
put_parallel(par);
|
|
|
|
return PNFS_ATTEMPTED;
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:41 +08:00
|
|
|
/* FIXME - range ignored */
|
2011-07-31 08:52:39 +08:00
|
|
|
static void
|
2011-07-31 08:52:41 +08:00
|
|
|
release_extents(struct pnfs_block_layout *bl, struct pnfs_layout_range *range)
|
2011-07-31 08:52:39 +08:00
|
|
|
{
|
2011-07-31 08:52:41 +08:00
|
|
|
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);
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
release_inval_marks(struct pnfs_inval_markings *marks)
|
|
|
|
{
|
2011-07-31 08:52:49 +08:00
|
|
|
struct pnfs_inval_tracking *pos, *temp;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(pos, temp, &marks->im_tree.mtt_stub, it_link) {
|
|
|
|
list_del(&pos->it_link);
|
|
|
|
kfree(pos);
|
|
|
|
}
|
2011-07-31 08:52:39 +08:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo)
|
|
|
|
{
|
|
|
|
struct pnfs_block_layout *bl = BLK_LO2EXT(lo);
|
|
|
|
|
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
release_extents(bl, NULL);
|
|
|
|
release_inval_marks(&bl->bl_inval);
|
|
|
|
kfree(bl);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode,
|
|
|
|
gfp_t gfp_flags)
|
|
|
|
{
|
|
|
|
struct pnfs_block_layout *bl;
|
|
|
|
|
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
bl = kzalloc(sizeof(*bl), gfp_flags);
|
|
|
|
if (!bl)
|
|
|
|
return NULL;
|
|
|
|
spin_lock_init(&bl->bl_ext_lock);
|
|
|
|
INIT_LIST_HEAD(&bl->bl_extents[0]);
|
|
|
|
INIT_LIST_HEAD(&bl->bl_extents[1]);
|
|
|
|
INIT_LIST_HEAD(&bl->bl_commit);
|
|
|
|
INIT_LIST_HEAD(&bl->bl_committing);
|
|
|
|
bl->bl_count = 0;
|
|
|
|
bl->bl_blocksize = NFS_SERVER(inode)->pnfs_blksize >> SECTOR_SHIFT;
|
|
|
|
BL_INIT_INVAL_MARKS(&bl->bl_inval, bl->bl_blocksize);
|
|
|
|
return &bl->bl_layout;
|
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:44 +08:00
|
|
|
static void bl_free_lseg(struct pnfs_layout_segment *lseg)
|
2011-07-31 08:52:39 +08:00
|
|
|
{
|
2011-07-31 08:52:44 +08:00
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
kfree(lseg);
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:44 +08:00
|
|
|
/* We pretty much ignore lseg, and store all data layout wide, so we
|
|
|
|
* can correctly merge.
|
|
|
|
*/
|
|
|
|
static struct pnfs_layout_segment *bl_alloc_lseg(struct pnfs_layout_hdr *lo,
|
|
|
|
struct nfs4_layoutget_res *lgr,
|
|
|
|
gfp_t gfp_flags)
|
2011-07-31 08:52:39 +08:00
|
|
|
{
|
2011-07-31 08:52:44 +08:00
|
|
|
struct pnfs_layout_segment *lseg;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
lseg = kzalloc(sizeof(*lseg), gfp_flags);
|
|
|
|
if (!lseg)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
status = nfs4_blk_process_layoutget(lo, lgr, gfp_flags);
|
|
|
|
if (status) {
|
|
|
|
/* We don't want to call the full-blown bl_free_lseg,
|
|
|
|
* since on error extents were not touched.
|
|
|
|
*/
|
|
|
|
kfree(lseg);
|
|
|
|
return ERR_PTR(status);
|
|
|
|
}
|
|
|
|
return lseg;
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bl_encode_layoutcommit(struct pnfs_layout_hdr *lo, struct xdr_stream *xdr,
|
|
|
|
const struct nfs4_layoutcommit_args *arg)
|
|
|
|
{
|
2011-07-31 08:52:51 +08:00
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
encode_pnfs_block_layoutupdate(BLK_LO2EXT(lo), xdr, arg);
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
bl_cleanup_layoutcommit(struct nfs4_layoutcommit_data *lcdata)
|
|
|
|
{
|
2011-07-31 08:52:52 +08:00
|
|
|
struct pnfs_layout_hdr *lo = NFS_I(lcdata->args.inode)->layout;
|
|
|
|
|
|
|
|
dprintk("%s enter\n", __func__);
|
|
|
|
clean_pnfs_block_layoutupdate(BLK_LO2EXT(lo), &lcdata->args, lcdata->res.status);
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:46 +08:00
|
|
|
static void free_blk_mountid(struct block_mount_id *mid)
|
|
|
|
{
|
|
|
|
if (mid) {
|
|
|
|
struct pnfs_block_dev *dev;
|
|
|
|
spin_lock(&mid->bm_lock);
|
|
|
|
while (!list_empty(&mid->bm_devlist)) {
|
|
|
|
dev = list_first_entry(&mid->bm_devlist,
|
|
|
|
struct pnfs_block_dev,
|
|
|
|
bm_node);
|
|
|
|
list_del(&dev->bm_node);
|
|
|
|
bl_free_block_dev(dev);
|
|
|
|
}
|
|
|
|
spin_unlock(&mid->bm_lock);
|
|
|
|
kfree(mid);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is mostly copied from the filelayout's get_device_info function.
|
|
|
|
* It seems much of this should be at the generic pnfs level.
|
|
|
|
*/
|
|
|
|
static struct pnfs_block_dev *
|
|
|
|
nfs4_blk_get_deviceinfo(struct nfs_server *server, const struct nfs_fh *fh,
|
|
|
|
struct nfs4_deviceid *d_id)
|
|
|
|
{
|
|
|
|
struct pnfs_device *dev;
|
|
|
|
struct pnfs_block_dev *rv = NULL;
|
|
|
|
u32 max_resp_sz;
|
|
|
|
int max_pages;
|
|
|
|
struct page **pages = NULL;
|
|
|
|
int i, rc;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Use the session max response size as the basis for setting
|
|
|
|
* GETDEVICEINFO's maxcount
|
|
|
|
*/
|
|
|
|
max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
|
|
|
|
max_pages = max_resp_sz >> PAGE_SHIFT;
|
|
|
|
dprintk("%s max_resp_sz %u max_pages %d\n",
|
|
|
|
__func__, max_resp_sz, max_pages);
|
|
|
|
|
|
|
|
dev = kmalloc(sizeof(*dev), GFP_NOFS);
|
|
|
|
if (!dev) {
|
|
|
|
dprintk("%s kmalloc failed\n", __func__);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
pages = kzalloc(max_pages * sizeof(struct page *), GFP_NOFS);
|
|
|
|
if (pages == NULL) {
|
|
|
|
kfree(dev);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
for (i = 0; i < max_pages; i++) {
|
|
|
|
pages[i] = alloc_page(GFP_NOFS);
|
|
|
|
if (!pages[i])
|
|
|
|
goto out_free;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(&dev->dev_id, d_id, sizeof(*d_id));
|
|
|
|
dev->layout_type = LAYOUT_BLOCK_VOLUME;
|
|
|
|
dev->pages = pages;
|
|
|
|
dev->pgbase = 0;
|
|
|
|
dev->pglen = PAGE_SIZE * max_pages;
|
|
|
|
dev->mincount = 0;
|
|
|
|
|
|
|
|
dprintk("%s: dev_id: %s\n", __func__, dev->dev_id.data);
|
|
|
|
rc = nfs4_proc_getdeviceinfo(server, dev);
|
|
|
|
dprintk("%s getdevice info returns %d\n", __func__, rc);
|
|
|
|
if (rc)
|
|
|
|
goto out_free;
|
|
|
|
|
|
|
|
rv = nfs4_blk_decode_device(server, dev);
|
|
|
|
out_free:
|
|
|
|
for (i = 0; i < max_pages; i++)
|
|
|
|
__free_page(pages[i]);
|
|
|
|
kfree(pages);
|
|
|
|
kfree(dev);
|
|
|
|
return rv;
|
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
static int
|
|
|
|
bl_set_layoutdriver(struct nfs_server *server, const struct nfs_fh *fh)
|
|
|
|
{
|
2011-07-31 08:52:46 +08:00
|
|
|
struct block_mount_id *b_mt_id = NULL;
|
|
|
|
struct pnfs_devicelist *dlist = NULL;
|
|
|
|
struct pnfs_block_dev *bdev;
|
|
|
|
LIST_HEAD(block_disklist);
|
|
|
|
int status = 0, i;
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
dprintk("%s enter\n", __func__);
|
2011-07-31 08:52:46 +08:00
|
|
|
|
|
|
|
if (server->pnfs_blksize == 0) {
|
|
|
|
dprintk("%s Server did not return blksize\n", __func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
b_mt_id = kzalloc(sizeof(struct block_mount_id), GFP_NOFS);
|
|
|
|
if (!b_mt_id) {
|
|
|
|
status = -ENOMEM;
|
|
|
|
goto out_error;
|
|
|
|
}
|
|
|
|
/* Initialize nfs4 block layout mount id */
|
|
|
|
spin_lock_init(&b_mt_id->bm_lock);
|
|
|
|
INIT_LIST_HEAD(&b_mt_id->bm_devlist);
|
|
|
|
|
|
|
|
dlist = kmalloc(sizeof(struct pnfs_devicelist), GFP_NOFS);
|
|
|
|
if (!dlist) {
|
|
|
|
status = -ENOMEM;
|
|
|
|
goto out_error;
|
|
|
|
}
|
|
|
|
dlist->eof = 0;
|
|
|
|
while (!dlist->eof) {
|
|
|
|
status = nfs4_proc_getdevicelist(server, fh, dlist);
|
|
|
|
if (status)
|
|
|
|
goto out_error;
|
|
|
|
dprintk("%s GETDEVICELIST numdevs=%i, eof=%i\n",
|
|
|
|
__func__, dlist->num_devs, dlist->eof);
|
|
|
|
for (i = 0; i < dlist->num_devs; i++) {
|
|
|
|
bdev = nfs4_blk_get_deviceinfo(server, fh,
|
|
|
|
&dlist->dev_id[i]);
|
|
|
|
if (!bdev) {
|
|
|
|
status = -ENODEV;
|
|
|
|
goto out_error;
|
|
|
|
}
|
|
|
|
spin_lock(&b_mt_id->bm_lock);
|
|
|
|
list_add(&bdev->bm_node, &b_mt_id->bm_devlist);
|
|
|
|
spin_unlock(&b_mt_id->bm_lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
dprintk("%s SUCCESS\n", __func__);
|
|
|
|
server->pnfs_ld_data = b_mt_id;
|
|
|
|
|
|
|
|
out_return:
|
|
|
|
kfree(dlist);
|
|
|
|
return status;
|
|
|
|
|
|
|
|
out_error:
|
|
|
|
free_blk_mountid(b_mt_id);
|
|
|
|
goto out_return;
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
bl_clear_layoutdriver(struct nfs_server *server)
|
|
|
|
{
|
2011-07-31 08:52:46 +08:00
|
|
|
struct block_mount_id *b_mt_id = server->pnfs_ld_data;
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
dprintk("%s enter\n", __func__);
|
2011-07-31 08:52:46 +08:00
|
|
|
free_blk_mountid(b_mt_id);
|
|
|
|
dprintk("%s RETURNS\n", __func__);
|
2011-07-31 08:52:39 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-07-31 08:52:40 +08:00
|
|
|
static const struct nfs_pageio_ops bl_pg_read_ops = {
|
|
|
|
.pg_init = pnfs_generic_pg_init_read,
|
|
|
|
.pg_test = pnfs_generic_pg_test,
|
|
|
|
.pg_doio = pnfs_generic_pg_readpages,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct nfs_pageio_ops bl_pg_write_ops = {
|
|
|
|
.pg_init = pnfs_generic_pg_init_write,
|
|
|
|
.pg_test = pnfs_generic_pg_test,
|
|
|
|
.pg_doio = pnfs_generic_pg_writepages,
|
|
|
|
};
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
static struct pnfs_layoutdriver_type blocklayout_type = {
|
|
|
|
.id = LAYOUT_BLOCK_VOLUME,
|
|
|
|
.name = "LAYOUT_BLOCK_VOLUME",
|
|
|
|
.read_pagelist = bl_read_pagelist,
|
|
|
|
.write_pagelist = bl_write_pagelist,
|
|
|
|
.alloc_layout_hdr = bl_alloc_layout_hdr,
|
|
|
|
.free_layout_hdr = bl_free_layout_hdr,
|
|
|
|
.alloc_lseg = bl_alloc_lseg,
|
|
|
|
.free_lseg = bl_free_lseg,
|
|
|
|
.encode_layoutcommit = bl_encode_layoutcommit,
|
|
|
|
.cleanup_layoutcommit = bl_cleanup_layoutcommit,
|
|
|
|
.set_layoutdriver = bl_set_layoutdriver,
|
|
|
|
.clear_layoutdriver = bl_clear_layoutdriver,
|
2011-07-31 08:52:40 +08:00
|
|
|
.pg_read_ops = &bl_pg_read_ops,
|
|
|
|
.pg_write_ops = &bl_pg_write_ops,
|
2011-07-31 08:52:39 +08:00
|
|
|
};
|
|
|
|
|
2011-07-31 08:52:42 +08:00
|
|
|
static const struct rpc_pipe_ops bl_upcall_ops = {
|
|
|
|
.upcall = bl_pipe_upcall,
|
|
|
|
.downcall = bl_pipe_downcall,
|
|
|
|
.destroy_msg = bl_pipe_destroy_msg,
|
|
|
|
};
|
|
|
|
|
2011-07-31 08:52:39 +08:00
|
|
|
static int __init nfs4blocklayout_init(void)
|
|
|
|
{
|
2011-07-31 08:52:42 +08:00
|
|
|
struct vfsmount *mnt;
|
|
|
|
struct path path;
|
2011-07-31 08:52:39 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__);
|
|
|
|
|
|
|
|
ret = pnfs_register_layoutdriver(&blocklayout_type);
|
2011-07-31 08:52:42 +08:00
|
|
|
if (ret)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
init_waitqueue_head(&bl_wq);
|
|
|
|
|
|
|
|
mnt = rpc_get_mount();
|
|
|
|
if (IS_ERR(mnt)) {
|
|
|
|
ret = PTR_ERR(mnt);
|
|
|
|
goto out_remove;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = vfs_path_lookup(mnt->mnt_root,
|
|
|
|
mnt,
|
|
|
|
NFS_PIPE_DIRNAME, 0, &path);
|
|
|
|
if (ret)
|
|
|
|
goto out_remove;
|
|
|
|
|
|
|
|
bl_device_pipe = rpc_mkpipe(path.dentry, "blocklayout", NULL,
|
|
|
|
&bl_upcall_ops, 0);
|
|
|
|
if (IS_ERR(bl_device_pipe)) {
|
|
|
|
ret = PTR_ERR(bl_device_pipe);
|
|
|
|
goto out_remove;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
out_remove:
|
|
|
|
pnfs_unregister_layoutdriver(&blocklayout_type);
|
2011-07-31 08:52:39 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit nfs4blocklayout_exit(void)
|
|
|
|
{
|
|
|
|
dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n",
|
|
|
|
__func__);
|
|
|
|
|
|
|
|
pnfs_unregister_layoutdriver(&blocklayout_type);
|
2011-07-31 08:52:42 +08:00
|
|
|
rpc_unlink(bl_device_pipe);
|
2011-07-31 08:52:39 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_ALIAS("nfs-layouttype4-3");
|
|
|
|
|
|
|
|
module_init(nfs4blocklayout_init);
|
|
|
|
module_exit(nfs4blocklayout_exit);
|