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NFSD: Replace boolean fields in struct nfsd4_copy

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Clean up: saves 8 bytes, and we can replace check_and_set_stop_copy()
with an atomic bitop.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2022-07-27 14:40:41 -04:00
parent 8ea6e2c90b
commit 1913cdf56c
3 changed files with 53 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
fs/nfsd/nfs4proc.c
View File

@ -1293,23 +1293,9 @@ static void nfs4_put_copy(struct nfsd4_copy *copy)
kfree(copy);
}
static bool
check_and_set_stop_copy(struct nfsd4_copy *copy)
{
bool value;
spin_lock(&copy->cp_clp->async_lock);
value = copy->stopped;
if (!copy->stopped)
copy->stopped = true;
spin_unlock(&copy->cp_clp->async_lock);
return value;
}
static void nfsd4_stop_copy(struct nfsd4_copy *copy)
{
/* only 1 thread should stop the copy */
if (!check_and_set_stop_copy(copy))
if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, &copy->cp_flags))
kthread_stop(copy->copy_task);
nfs4_put_copy(copy);
}
@ -1678,8 +1664,9 @@ static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
{
copy->cp_res.wr_stable_how =
copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE;
copy->cp_synchronous = sync;
test_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags) ?
NFS_FILE_SYNC : NFS_UNSTABLE;
nfsd4_copy_set_sync(copy, sync);
gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
}
@ -1708,16 +1695,16 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
copy->cp_res.wr_bytes_written += bytes_copied;
src_pos += bytes_copied;
dst_pos += bytes_copied;
} while (bytes_total > 0 && !copy->cp_synchronous);
} while (bytes_total > 0 && nfsd4_copy_is_async(copy));
/* for a non-zero asynchronous copy do a commit of data */
if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) {
if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
since = READ_ONCE(dst->f_wb_err);
status = vfs_fsync_range(dst, copy->cp_dst_pos,
copy->cp_res.wr_bytes_written, 0);
if (!status)
status = filemap_check_wb_err(dst->f_mapping, since);
if (!status)
copy->committed = true;
set_bit(NFSD4_COPY_F_COMMITTED, &copy->cp_flags);
}
return bytes_copied;
}
@ -1738,7 +1725,7 @@ static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
status = nfs_ok;
}
if (!copy->cp_intra) /* Inter server SSC */
if (nfsd4_ssc_is_inter(copy))
nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
copy->nf_dst);
else
@ -1752,13 +1739,13 @@ static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
dst->cp_src_pos = src->cp_src_pos;
dst->cp_dst_pos = src->cp_dst_pos;
dst->cp_count = src->cp_count;
dst->cp_synchronous = src->cp_synchronous;
dst->cp_flags = src->cp_flags;
memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
memcpy(&dst->fh, &src->fh, sizeof(src->fh));
dst->cp_clp = src->cp_clp;
dst->nf_dst = nfsd_file_get(src->nf_dst);
dst->cp_intra = src->cp_intra;
if (src->cp_intra) /* for inter, file_src doesn't exist yet */
/* for inter, nf_src doesn't exist yet */
if (!nfsd4_ssc_is_inter(src))
dst->nf_src = nfsd_file_get(src->nf_src);
memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
@ -1772,7 +1759,7 @@ static void cleanup_async_copy(struct nfsd4_copy *copy)
{
nfs4_free_copy_state(copy);
nfsd_file_put(copy->nf_dst);
if (copy->cp_intra)
if (!nfsd4_ssc_is_inter(copy))
nfsd_file_put(copy->nf_src);
spin_lock(&copy->cp_clp->async_lock);
list_del(&copy->copies);
@ -1785,7 +1772,7 @@ static int nfsd4_do_async_copy(void *data)
struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
struct nfsd4_copy *cb_copy;
if (!copy->cp_intra) { /* Inter server SSC */
if (nfsd4_ssc_is_inter(copy)) {
copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
if (!copy->nf_src) {
copy->nfserr = nfserr_serverfault;
@ -1817,7 +1804,7 @@ do_callback:
&copy->fh, copy->cp_count, copy->nfserr);
nfsd4_run_cb(&cb_copy->cp_cb);
out:
if (!copy->cp_intra)
if (nfsd4_ssc_is_inter(copy))
kfree(copy->nf_src);
cleanup_async_copy(copy);
return 0;
@ -1831,8 +1818,8 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
struct nfsd4_copy *async_copy = NULL;
if (!copy->cp_intra) { /* Inter server SSC */
if (!inter_copy_offload_enable || copy->cp_synchronous) {
if (nfsd4_ssc_is_inter(copy)) {
if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
status = nfserr_notsupp;
goto out;
}
@ -1849,7 +1836,7 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
copy->cp_clp = cstate->clp;
memcpy(&copy->fh, &cstate->current_fh.fh_handle,
sizeof(struct knfsd_fh));
if (!copy->cp_synchronous) {
if (nfsd4_copy_is_async(copy)) {
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
status = nfserrno(-ENOMEM);
@ -1884,7 +1871,7 @@ out_err:
if (async_copy)
cleanup_async_copy(async_copy);
status = nfserrno(-ENOMEM);
if (!copy->cp_intra)
if (nfsd4_ssc_is_inter(copy))
nfsd4_interssc_disconnect(copy->ss_mnt);
goto out;
}
@ -2613,7 +2600,7 @@ check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
return;
}
putfh = (struct nfsd4_putfh *)&saved_op->u;
if (!copy->cp_intra)
if (nfsd4_ssc_is_inter(copy))
putfh->no_verify = true;
}
}

12
fs/nfsd/nfs4xdr.c
View File

@ -1896,8 +1896,8 @@ static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
static __be32
nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
{
u32 consecutive, i, count, sync;
struct nl4_server *ns_dummy;
u32 consecutive, i, count;
__be32 status;
status = nfsd4_decode_stateid4(argp, &copy->cp_src_stateid);
@ -1915,17 +1915,17 @@ nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
/* ca_consecutive: we always do consecutive copies */
if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
return nfserr_bad_xdr;
if (xdr_stream_decode_u32(argp->xdr, &copy->cp_synchronous) < 0)
if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
return nfserr_bad_xdr;
nfsd4_copy_set_sync(copy, sync);
if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
return nfserr_bad_xdr;
copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
if (copy->cp_src == NULL)
return nfserr_jukebox;
copy->cp_intra = false;
if (count == 0) { /* intra-server copy */
copy->cp_intra = true;
__set_bit(NFSD4_COPY_F_INTRA, &copy->cp_flags);
return nfs_ok;
}
@ -4704,13 +4704,13 @@ nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
__be32 *p;
nfserr = nfsd42_encode_write_res(resp, &copy->cp_res,
!!copy->cp_synchronous);
nfsd4_copy_is_sync(copy));
if (nfserr)
return nfserr;
p = xdr_reserve_space(resp->xdr, 4 + 4);
*p++ = xdr_one; /* cr_consecutive */
*p++ = cpu_to_be32(copy->cp_synchronous);
*p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero;
return 0;
}

33
fs/nfsd/xdr4.h
View File

@ -541,10 +541,12 @@ struct nfsd4_copy {
u64 cp_dst_pos;
u64 cp_count;
struct nl4_server *cp_src;
bool cp_intra;
/* both */
u32 cp_synchronous;
unsigned long cp_flags;
#define NFSD4_COPY_F_STOPPED (0)
#define NFSD4_COPY_F_INTRA (1)
#define NFSD4_COPY_F_SYNCHRONOUS (2)
#define NFSD4_COPY_F_COMMITTED (3)
/* response */
struct nfsd42_write_res cp_res;
@ -564,14 +566,35 @@ struct nfsd4_copy {
struct list_head copies;
struct task_struct *copy_task;
refcount_t refcount;
bool stopped;
struct vfsmount *ss_mnt;
struct nfs_fh c_fh;
nfs4_stateid stateid;
bool committed;
};
static inline void nfsd4_copy_set_sync(struct nfsd4_copy *copy, bool sync)
{
if (sync)
set_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
else
clear_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
}
static inline bool nfsd4_copy_is_sync(const struct nfsd4_copy *copy)
{
return test_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
}
static inline bool nfsd4_copy_is_async(const struct nfsd4_copy *copy)
{
return !test_bit(NFSD4_COPY_F_SYNCHRONOUS, &copy->cp_flags);
}
static inline bool nfsd4_ssc_is_inter(const struct nfsd4_copy *copy)
{
return !test_bit(NFSD4_COPY_F_INTRA, &copy->cp_flags);
}
struct nfsd4_seek {
/* request */
stateid_t seek_stateid;