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linux-sg2042
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nfs: remove unused writeverf code 

Remove duplicate writeverf structure from merge of nfs_pgio_header and
nfs_pgio_data and remove writeverf related flags and logic to handle
more than one RPC per nfs_pgio_header.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Weston Andros Adamson 2014-06-09 11:48:36 -04:00 committed by Trond Myklebust
parent d45f60c678
commit c65e6254ca
7 changed files with 18 additions and 46 deletions
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2
fs/nfs/blocklayout/blocklayout.c
View File

@ -445,7 +445,7 @@ static void bl_end_par_io_write(void *data, int num_se)
}
hdr->task.tk_status = hdr->pnfs_error;
hdr->writeverf.committed = NFS_FILE_SYNC;
hdr->verf.committed = NFS_FILE_SYNC;
INIT_WORK(&hdr->task.u.tk_work, bl_write_cleanup);
schedule_work(&hdr->task.u.tk_work);
}

25
fs/nfs/direct.c
View File

@ -715,7 +715,7 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
{
struct nfs_direct_req *dreq = hdr->dreq;
struct nfs_commit_info cinfo;
int bit = -1;
bool request_commit = false;
struct nfs_page *req = nfs_list_entry(hdr->pages.next);
if (test_bit(NFS_IOHDR_REDO, &hdr->flags))
@ -729,27 +729,20 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
dreq->flags = 0;
dreq->error = hdr->error;
}
if (dreq->error != 0)
bit = NFS_IOHDR_ERROR;
else {
if (dreq->error == 0) {
dreq->count += hdr->good_bytes;
if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) {
dreq->flags = NFS_ODIRECT_RESCHED_WRITES;
bit = NFS_IOHDR_NEED_RESCHED;
} else if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) {
if (nfs_write_need_commit(hdr)) {
if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES)
bit = NFS_IOHDR_NEED_RESCHED;
request_commit = true;
else if (dreq->flags == 0) {
nfs_direct_set_hdr_verf(dreq, hdr);
bit = NFS_IOHDR_NEED_COMMIT;
request_commit = true;
dreq->flags = NFS_ODIRECT_DO_COMMIT;
} else if (dreq->flags == NFS_ODIRECT_DO_COMMIT) {
if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr)) {
request_commit = true;
if (nfs_direct_set_or_cmp_hdr_verf(dreq, hdr))
dreq->flags =
NFS_ODIRECT_RESCHED_WRITES;
bit = NFS_IOHDR_NEED_RESCHED;
} else
bit = NFS_IOHDR_NEED_COMMIT;
}
}
}
@ -760,9 +753,7 @@ static void nfs_direct_write_completion(struct nfs_pgio_header *hdr)
req = nfs_list_entry(hdr->pages.next);
nfs_list_remove_request(req);
switch (bit) {
case NFS_IOHDR_NEED_RESCHED:
case NFS_IOHDR_NEED_COMMIT:
if (request_commit) {
kref_get(&req->wb_kref);
nfs_mark_request_commit(req, hdr->lseg, &cinfo);
do_destroy = false;

1
fs/nfs/internal.h
View File

@ -441,6 +441,7 @@ int nfs_scan_commit(struct inode *inode, struct list_head *dst,
void nfs_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo);
int nfs_write_need_commit(struct nfs_pgio_header *);
int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
int how, struct nfs_commit_info *cinfo);
void nfs_retry_commit(struct list_head *page_list,

4
fs/nfs/objlayout/objlayout.c
View File

@ -328,7 +328,7 @@ objlayout_write_done(struct objlayout_io_res *oir, ssize_t status, bool sync)
oir->status = hdr->task.tk_status = status;
if (status >= 0) {
hdr->res.count = status;
hdr->writeverf.committed = oir->committed;
hdr->verf.committed = oir->committed;
} else {
hdr->pnfs_error = status;
}
@ -336,7 +336,7 @@ objlayout_write_done(struct objlayout_io_res *oir, ssize_t status, bool sync)
/* must not use oir after this point */
dprintk("%s: Return status %zd committed %d sync=%d\n", __func__,
status, hdr->writeverf.committed, sync);
status, hdr->verf.committed, sync);
if (sync)
pnfs_ld_write_done(hdr);

2
fs/nfs/pagelist.c
View File

@ -545,7 +545,7 @@ static void nfs_pgio_rpcsetup(struct nfs_pgio_header *hdr,
hdr->res.fattr = &hdr->fattr;
hdr->res.count = count;
hdr->res.eof = 0;
hdr->res.verf = &hdr->writeverf;
hdr->res.verf = &hdr->verf;
nfs_fattr_init(&hdr->fattr);
}

27
fs/nfs/write.c
View File

@ -595,12 +595,11 @@ nfs_clear_request_commit(struct nfs_page *req)
}
}
static inline
int nfs_write_need_commit(struct nfs_pgio_header *hdr)
{
if (hdr->writeverf.committed == NFS_DATA_SYNC)
if (hdr->verf.committed == NFS_DATA_SYNC)
return hdr->lseg == NULL;
return hdr->writeverf.committed != NFS_FILE_SYNC;
return hdr->verf.committed != NFS_FILE_SYNC;
}
#else
@ -626,7 +625,6 @@ nfs_clear_request_commit(struct nfs_page *req)
{
}
static inline
int nfs_write_need_commit(struct nfs_pgio_header *hdr)
{
return 0;
@ -654,11 +652,7 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr)
nfs_context_set_write_error(req->wb_context, hdr->error);
goto remove_req;
}
if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags)) {
nfs_mark_request_dirty(req);
goto next;
}
if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) {
if (nfs_write_need_commit(hdr)) {
memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
nfs_mark_request_commit(req, hdr->lseg, &cinfo);
goto next;
@ -668,7 +662,7 @@ remove_req:
next:
nfs_unlock_request(req);
nfs_end_page_writeback(req);
do_destroy = !test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags);
do_destroy = !nfs_write_need_commit(hdr);
nfs_release_request(req);
}
out:
@ -1088,18 +1082,7 @@ void nfs_commit_prepare(struct rpc_task *task, void *calldata)
static void nfs_writeback_release_common(struct nfs_pgio_header *hdr)
{
int status = hdr->task.tk_status;
if ((status >= 0) && nfs_write_need_commit(hdr)) {
spin_lock(&hdr->lock);
if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags))
; /* Do nothing */
else if (!test_and_set_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags))
memcpy(&hdr->verf, &hdr->writeverf, sizeof(hdr->verf));
else if (memcmp(&hdr->verf, &hdr->writeverf, sizeof(hdr->verf)))
set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags);
spin_unlock(&hdr->lock);
}
/* do nothing! */
}
/*

3
include/linux/nfs_xdr.h
View File

@ -1253,8 +1253,6 @@ enum {
NFS_IOHDR_ERROR = 0,
NFS_IOHDR_EOF,
NFS_IOHDR_REDO,
NFS_IOHDR_NEED_COMMIT,
NFS_IOHDR_NEED_RESCHED,
};
struct nfs_pgio_header {
@ -1284,7 +1282,6 @@ struct nfs_pgio_header {
*/
struct rpc_task task;
struct nfs_fattr fattr;
struct nfs_writeverf writeverf; /* Used for writes */
struct nfs_pgio_args args; /* argument struct */
struct nfs_pgio_res res; /* result struct */
unsigned long timestamp; /* For lease renewal */