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![Benny Halevy](/assets/img/avatar_default.png)
Pass the directio request on pageio_init to clean up the API. Percolate pg_dreq from original nfs_pageio_descriptor to the pnfs_{read,write}_done_resend_to_mds and use it on respective call to nfs_pageio_init_{read,write} on the newly created nfs_pageio_descriptor. Reproduced by command: mount -o vers=4.1 server:/ /mnt dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs] PGD 34786067 PUD 34794067 PMD 0 Oops: 0002 [#1] SMP Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4 CPU 1 Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs] RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206 RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000 RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028 RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510 R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40 R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878 FS: 0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480) Stack: ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82 ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48 Call Trace: [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs] [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs] [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs] [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99 [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc] [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs] [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs] [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4] [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc] [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files] [<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files] [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4] [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs] [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs] [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files] [<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc] [<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc] [<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173 [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc] [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc] [<ffffffff8105f8c1>] process_one_work+0x226/0x422 [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422 [<ffffffff81094757>] ? lock_acquired+0x210/0x249 [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc] [<ffffffff810600d8>] worker_thread+0x126/0x1c4 [<ffffffff8105ffb2>] ? manage_workers+0x240/0x240 [<ffffffff81064ef8>] kthread+0xb1/0xb9 [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65 [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0 [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65 Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f RIP [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs] RSP <ffff880038f8fa68> CR2: 0000000000000028 Signed-off-by: Benny Halevy <bhalevy@tonian.com> Cc: stable@kernel.org [>= 3.6] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
517 lines
16 KiB
C
517 lines
16 KiB
C
/*
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* pNFS client data structures.
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*
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* Copyright (c) 2002
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Dean Hildebrand <dhildebz@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 or warranty
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* of any kind either express or implied, including without limitation
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* the implied warranties of merchantability, fitness for a particular
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* purpose, or noninfringement. The Regents of the University of
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* Michigan shall not be liable for any damages, including special,
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* indirect, incidental, or consequential damages, with respect to any
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* claim arising out of or in connection with the use of the software,
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* even if it has been or is hereafter advised of the possibility of
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* such damages.
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*/
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#ifndef FS_NFS_PNFS_H
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#define FS_NFS_PNFS_H
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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enum {
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NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
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NFS_LSEG_ROC, /* roc bit received from server */
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NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
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};
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struct pnfs_layout_segment {
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struct list_head pls_list;
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struct list_head pls_lc_list;
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struct pnfs_layout_range pls_range;
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atomic_t pls_refcount;
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unsigned long pls_flags;
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struct pnfs_layout_hdr *pls_layout;
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};
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enum pnfs_try_status {
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PNFS_ATTEMPTED = 0,
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PNFS_NOT_ATTEMPTED = 1,
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};
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#ifdef CONFIG_NFS_V4_1
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#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
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enum {
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NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
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NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
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NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
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NFS_LAYOUT_ROC, /* some lseg had roc bit set */
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NFS_LAYOUT_RETURN, /* Return this layout ASAP */
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};
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enum layoutdriver_policy_flags {
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/* Should the pNFS client commit and return the layout upon a setattr */
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PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
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PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
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};
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struct nfs4_deviceid_node;
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/* Per-layout driver specific registration structure */
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struct pnfs_layoutdriver_type {
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struct list_head pnfs_tblid;
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const u32 id;
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const char *name;
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struct module *owner;
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unsigned flags;
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int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
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int (*clear_layoutdriver) (struct nfs_server *);
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struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
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void (*free_layout_hdr) (struct pnfs_layout_hdr *);
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struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
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void (*free_lseg) (struct pnfs_layout_segment *lseg);
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/* test for nfs page cache coalescing */
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const struct nfs_pageio_ops *pg_read_ops;
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const struct nfs_pageio_ops *pg_write_ops;
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struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
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void (*mark_request_commit) (struct nfs_page *req,
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struct pnfs_layout_segment *lseg,
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struct nfs_commit_info *cinfo);
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void (*clear_request_commit) (struct nfs_page *req,
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struct nfs_commit_info *cinfo);
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int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
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int max);
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void (*recover_commit_reqs) (struct list_head *list,
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struct nfs_commit_info *cinfo);
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int (*commit_pagelist)(struct inode *inode,
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struct list_head *mds_pages,
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int how,
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struct nfs_commit_info *cinfo);
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/*
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* Return PNFS_ATTEMPTED to indicate the layout code has attempted
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* I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
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*/
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enum pnfs_try_status (*read_pagelist) (struct nfs_read_data *nfs_data);
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enum pnfs_try_status (*write_pagelist) (struct nfs_write_data *nfs_data, int how);
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void (*free_deviceid_node) (struct nfs4_deviceid_node *);
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void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
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struct xdr_stream *xdr,
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const struct nfs4_layoutreturn_args *args);
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void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
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void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid,
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struct xdr_stream *xdr,
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const struct nfs4_layoutcommit_args *args);
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};
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struct pnfs_layout_hdr {
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atomic_t plh_refcount;
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struct list_head plh_layouts; /* other client layouts */
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struct list_head plh_bulk_destroy;
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struct list_head plh_segs; /* layout segments list */
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nfs4_stateid plh_stateid;
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atomic_t plh_outstanding; /* number of RPCs out */
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unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
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u32 plh_barrier; /* ignore lower seqids */
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unsigned long plh_retry_timestamp;
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unsigned long plh_flags;
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loff_t plh_lwb; /* last write byte for layoutcommit */
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struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
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struct inode *plh_inode;
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};
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struct pnfs_device {
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struct nfs4_deviceid dev_id;
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unsigned int layout_type;
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unsigned int mincount;
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struct page **pages;
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unsigned int pgbase;
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unsigned int pglen;
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};
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#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
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struct pnfs_devicelist {
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unsigned int eof;
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unsigned int num_devs;
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struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
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};
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extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
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extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
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/* nfs4proc.c */
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extern int nfs4_proc_getdevicelist(struct nfs_server *server,
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const struct nfs_fh *fh,
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struct pnfs_devicelist *devlist);
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extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
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struct pnfs_device *dev);
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extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
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extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
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/* pnfs.c */
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void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
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void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
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void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *,
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const struct nfs_pgio_completion_ops *);
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void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *,
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int, const struct nfs_pgio_completion_ops *);
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void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
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void unset_pnfs_layoutdriver(struct nfs_server *);
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void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
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int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
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void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
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struct nfs_page *req, u64 wb_size);
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int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
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bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
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void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
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struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
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void pnfs_free_lseg_list(struct list_head *tmp_list);
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void pnfs_destroy_layout(struct nfs_inode *);
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void pnfs_destroy_all_layouts(struct nfs_client *);
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int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
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struct nfs_fsid *fsid,
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bool is_recall);
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int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
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bool is_recall);
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void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
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void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
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const nfs4_stateid *new,
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bool update_barrier);
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int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
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struct pnfs_layout_hdr *lo,
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struct nfs4_state *open_state);
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int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
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struct list_head *tmp_list,
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struct pnfs_layout_range *recall_range);
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bool pnfs_roc(struct inode *ino);
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void pnfs_roc_release(struct inode *ino);
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void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
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bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
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void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
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void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
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int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
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int _pnfs_return_layout(struct inode *);
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void pnfs_ld_write_done(struct nfs_write_data *);
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void pnfs_ld_read_done(struct nfs_read_data *);
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struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
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struct nfs_open_context *ctx,
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loff_t pos,
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u64 count,
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enum pnfs_iomode iomode,
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gfp_t gfp_flags);
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void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
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int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
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const struct nfs_pgio_completion_ops *compl_ops,
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struct nfs_direct_req *dreq);
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int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
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const struct nfs_pgio_completion_ops *compl_ops,
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struct nfs_direct_req *dreq);
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struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
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/* nfs4_deviceid_flags */
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enum {
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NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
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NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
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};
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/* pnfs_dev.c */
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struct nfs4_deviceid_node {
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struct hlist_node node;
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struct hlist_node tmpnode;
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const struct pnfs_layoutdriver_type *ld;
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const struct nfs_client *nfs_client;
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unsigned long flags;
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unsigned long timestamp_unavailable;
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struct nfs4_deviceid deviceid;
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atomic_t ref;
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};
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struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
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void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
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void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
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const struct pnfs_layoutdriver_type *,
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const struct nfs_client *,
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const struct nfs4_deviceid *);
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struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
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bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
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void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
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bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
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void nfs4_deviceid_purge_client(const struct nfs_client *);
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static inline struct pnfs_layout_segment *
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pnfs_get_lseg(struct pnfs_layout_segment *lseg)
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{
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if (lseg) {
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atomic_inc(&lseg->pls_refcount);
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smp_mb__after_atomic_inc();
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}
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return lseg;
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}
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/* Return true if a layout driver is being used for this mountpoint */
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static inline int pnfs_enabled_sb(struct nfs_server *nfss)
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{
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return nfss->pnfs_curr_ld != NULL;
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}
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static inline int
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pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
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struct nfs_commit_info *cinfo)
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{
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if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
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return PNFS_NOT_ATTEMPTED;
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return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
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}
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static inline struct pnfs_ds_commit_info *
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pnfs_get_ds_info(struct inode *inode)
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{
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struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
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if (ld == NULL || ld->get_ds_info == NULL)
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return NULL;
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return ld->get_ds_info(inode);
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}
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static inline bool
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pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
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struct nfs_commit_info *cinfo)
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{
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struct inode *inode = req->wb_context->dentry->d_inode;
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struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
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if (lseg == NULL || ld->mark_request_commit == NULL)
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return false;
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ld->mark_request_commit(req, lseg, cinfo);
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return true;
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}
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static inline bool
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pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
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{
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struct inode *inode = req->wb_context->dentry->d_inode;
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struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
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if (ld == NULL || ld->clear_request_commit == NULL)
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return false;
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ld->clear_request_commit(req, cinfo);
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return true;
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}
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static inline int
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pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
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int max)
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{
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if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
|
|
return 0;
|
|
else
|
|
return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
|
|
}
|
|
|
|
static inline void
|
|
pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
|
|
struct nfs_commit_info *cinfo)
|
|
{
|
|
if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
|
|
return;
|
|
NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo);
|
|
}
|
|
|
|
/* Should the pNFS client commit and return the layout upon a setattr */
|
|
static inline bool
|
|
pnfs_ld_layoutret_on_setattr(struct inode *inode)
|
|
{
|
|
if (!pnfs_enabled_sb(NFS_SERVER(inode)))
|
|
return false;
|
|
return NFS_SERVER(inode)->pnfs_curr_ld->flags &
|
|
PNFS_LAYOUTRET_ON_SETATTR;
|
|
}
|
|
|
|
static inline int pnfs_return_layout(struct inode *ino)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(ino);
|
|
struct nfs_server *nfss = NFS_SERVER(ino);
|
|
|
|
if (pnfs_enabled_sb(nfss) && nfsi->layout)
|
|
return _pnfs_return_layout(ino);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
|
|
struct nfs_server *nfss)
|
|
{
|
|
return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
|
|
nfss->pnfs_curr_ld->id == src->l_type);
|
|
}
|
|
|
|
#ifdef NFS_DEBUG
|
|
void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
|
|
#else
|
|
static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
|
|
{
|
|
}
|
|
#endif /* NFS_DEBUG */
|
|
#else /* CONFIG_NFS_V4_1 */
|
|
|
|
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
|
|
{
|
|
}
|
|
|
|
static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
|
|
{
|
|
}
|
|
|
|
static inline struct pnfs_layout_segment *
|
|
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
|
|
{
|
|
}
|
|
|
|
static inline int pnfs_return_layout(struct inode *ino)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_ld_layoutret_on_setattr(struct inode *inode)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_roc(struct inode *ino)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void
|
|
pnfs_roc_release(struct inode *ino)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
|
|
{
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void set_pnfs_layoutdriver(struct nfs_server *s,
|
|
const struct nfs_fh *mntfh, u32 id)
|
|
{
|
|
}
|
|
|
|
static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
|
|
{
|
|
}
|
|
|
|
static inline void pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode,
|
|
const struct nfs_pgio_completion_ops *compl_ops)
|
|
{
|
|
nfs_pageio_init_read(pgio, inode, compl_ops);
|
|
}
|
|
|
|
static inline void pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags,
|
|
const struct nfs_pgio_completion_ops *compl_ops)
|
|
{
|
|
nfs_pageio_init_write(pgio, inode, ioflags, compl_ops);
|
|
}
|
|
|
|
static inline int
|
|
pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
|
|
struct nfs_commit_info *cinfo)
|
|
{
|
|
return PNFS_NOT_ATTEMPTED;
|
|
}
|
|
|
|
static inline struct pnfs_ds_commit_info *
|
|
pnfs_get_ds_info(struct inode *inode)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
|
|
struct nfs_commit_info *cinfo)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int
|
|
pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
|
|
int max)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list,
|
|
struct nfs_commit_info *cinfo)
|
|
{
|
|
}
|
|
|
|
static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool
|
|
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
|
|
struct nfs_server *nfss)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
#endif /* FS_NFS_PNFS_H */
|