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ceph: optimize flock encoding during reconnect

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Don't malloc if there is no flock.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng
2017-09-11 10:36:28 +08:00
committed by Ilya Dryomov
parent c6db847233
commit 4deb14a259
2 changed files with 30 additions and 21 deletions
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34
fs/ceph/mds_client.c
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@@ -2899,26 +2899,32 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
if (recon_state->msg_version >= 2) {
int num_fcntl_locks, num_flock_locks;
struct ceph_filelock *flocks;
struct ceph_filelock *flocks = NULL;
size_t struct_len, total_len = 0;
u8 struct_v = 0;
encode_again:
ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks);
flocks = kmalloc((num_fcntl_locks+num_flock_locks) *
sizeof(struct ceph_filelock), GFP_NOFS);
if (!flocks) {
err = -ENOMEM;
goto out_free;
}
err = ceph_encode_locks_to_buffer(inode, flocks,
num_fcntl_locks,
num_flock_locks);
if (err) {
if (num_fcntl_locks + num_flock_locks > 0) {
flocks = kmalloc((num_fcntl_locks + num_flock_locks) *
sizeof(struct ceph_filelock), GFP_NOFS);
if (!flocks) {
err = -ENOMEM;
goto out_free;
}
err = ceph_encode_locks_to_buffer(inode, flocks,
num_fcntl_locks,
num_flock_locks);
if (err) {
kfree(flocks);
flocks = NULL;
if (err == -ENOSPC)
goto encode_again;
goto out_free;
}
} else {
kfree(flocks);
if (err == -ENOSPC)
goto encode_again;
goto out_free;
flocks = NULL;
}
if (recon_state->msg_version >= 3) {