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ceph: update cap reconnect message to version 3 

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng 2016-07-04 22:05:18 +08:00 committed by Ilya Dryomov
parent 430afbadd6
commit 121f22a19a
1 changed files with 47 additions and 21 deletions
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68
fs/ceph/mds_client.c
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@ -48,7 +48,7 @@
struct ceph_reconnect_state {
int nr_caps;
struct ceph_pagelist *pagelist;
bool flock;
unsigned msg_version;
};
static void __wake_requests(struct ceph_mds_client *mdsc,
@ -2791,7 +2791,6 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
struct ceph_mds_cap_reconnect v2;
struct ceph_mds_cap_reconnect_v1 v1;
} rec;
size_t reclen;
struct ceph_inode_info *ci;
struct ceph_reconnect_state *recon_state = arg;
struct ceph_pagelist *pagelist = recon_state->pagelist;
@ -2820,9 +2819,6 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
path = NULL;
pathlen = 0;
}
err = ceph_pagelist_encode_string(pagelist, path, pathlen);
if (err)
goto out_free;
spin_lock(&ci->i_ceph_lock);
cap->seq = 0; /* reset cap seq */
@ -2830,14 +2826,13 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
cap->mseq = 0; /* and migrate_seq */
cap->cap_gen = cap->session->s_cap_gen;
if (recon_state->flock) {
if (recon_state->msg_version >= 2) {
rec.v2.cap_id = cpu_to_le64(cap->cap_id);
rec.v2.wanted = cpu_to_le32(__ceph_caps_wanted(ci));
rec.v2.issued = cpu_to_le32(cap->issued);
rec.v2.snaprealm = cpu_to_le64(ci->i_snap_realm->ino);
rec.v2.pathbase = cpu_to_le64(pathbase);
rec.v2.flock_len = 0;
reclen = sizeof(rec.v2);
} else {
rec.v1.cap_id = cpu_to_le64(cap->cap_id);
rec.v1.wanted = cpu_to_le32(__ceph_caps_wanted(ci));
@ -2847,13 +2842,14 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
ceph_encode_timespec(&rec.v1.atime, &inode->i_atime);
rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino);
rec.v1.pathbase = cpu_to_le64(pathbase);
reclen = sizeof(rec.v1);
}
spin_unlock(&ci->i_ceph_lock);
if (recon_state->flock) {
if (recon_state->msg_version >= 2) {
int num_fcntl_locks, num_flock_locks;
struct ceph_filelock *flocks;
size_t struct_len, total_len = 0;
u8 struct_v = 0;
encode_again:
ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks);
@ -2872,20 +2868,46 @@ encode_again:
goto encode_again;
goto out_free;
}
if (recon_state->msg_version >= 3) {
/* version, compat_version and struct_len */
total_len = 2 * sizeof(u8) + sizeof(u32);
struct_v = 1;
}
/*
* number of encoded locks is stable, so copy to pagelist
*/
rec.v2.flock_len = cpu_to_le32(2*sizeof(u32) +
(num_fcntl_locks+num_flock_locks) *
sizeof(struct ceph_filelock));
err = ceph_pagelist_append(pagelist, &rec, reclen);
if (!err)
err = ceph_locks_to_pagelist(flocks, pagelist,
num_fcntl_locks,
num_flock_locks);
struct_len = 2 * sizeof(u32) +
(num_fcntl_locks + num_flock_locks) *
sizeof(struct ceph_filelock);
rec.v2.flock_len = cpu_to_le32(struct_len);
struct_len += sizeof(rec.v2);
struct_len += sizeof(u32) + pathlen;
total_len += struct_len;
err = ceph_pagelist_reserve(pagelist, total_len);
if (!err) {
if (recon_state->msg_version >= 3) {
ceph_pagelist_encode_8(pagelist, struct_v);
ceph_pagelist_encode_8(pagelist, 1);
ceph_pagelist_encode_32(pagelist, struct_len);
}
ceph_pagelist_encode_string(pagelist, path, pathlen);
ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2));
ceph_locks_to_pagelist(flocks, pagelist,
num_fcntl_locks,
num_flock_locks);
}
kfree(flocks);
} else {
err = ceph_pagelist_append(pagelist, &rec, reclen);
size_t size = sizeof(u32) + pathlen + sizeof(rec.v1);
err = ceph_pagelist_reserve(pagelist, size);
if (!err) {
ceph_pagelist_encode_string(pagelist, path, pathlen);
ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1));
}
}
recon_state->nr_caps++;
@ -2976,7 +2998,12 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
recon_state.nr_caps = 0;
recon_state.pagelist = pagelist;
recon_state.flock = session->s_con.peer_features & CEPH_FEATURE_FLOCK;
if (session->s_con.peer_features & CEPH_FEATURE_MDSENC)
recon_state.msg_version = 3;
else if (session->s_con.peer_features & CEPH_FEATURE_FLOCK)
recon_state.msg_version = 2;
else
recon_state.msg_version = 1;
err = iterate_session_caps(session, encode_caps_cb, &recon_state);
if (err < 0)
goto fail;
@ -3005,8 +3032,7 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
goto fail;
}
if (recon_state.flock)
reply->hdr.version = cpu_to_le16(2);
reply->hdr.version = cpu_to_le16(recon_state.msg_version);
/* raced with cap release? */
if (s_nr_caps != recon_state.nr_caps) {