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ceph: rados pool namespace support

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This patch adds codes that decode pool namespace information in
cap message and request reply. Pool namespace is saved in i_layout,
it will be passed to libceph when doing read/write.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng
2016-03-07 09:35:06 +08:00
committed by Ilya Dryomov
parent cd08e0a274
commit 779fe0fb8e
8 changed files with 159 additions and 77 deletions
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46
fs/ceph/caps.c
View File

@@ -2779,12 +2779,11 @@ static void invalidate_aliases(struct inode *inode)
*/
static void handle_cap_grant(struct ceph_mds_client *mdsc,
struct inode *inode, struct ceph_mds_caps *grant,
u64 inline_version,
void *inline_data, int inline_len,
struct ceph_string **pns, u64 inline_version,
void *inline_data, u32 inline_len,
struct ceph_buffer *xattr_buf,
struct ceph_mds_session *session,
struct ceph_cap *cap, int issued,
u32 pool_ns_len)
struct ceph_cap *cap, int issued)
__releases(ci->i_ceph_lock)
__releases(mdsc->snap_rwsem)
{
@@ -2896,11 +2895,18 @@ static void handle_cap_grant(struct ceph_mds_client *mdsc,
if (newcaps & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR)) {
/* file layout may have changed */
s64 old_pool = ci->i_layout.pool_id;
struct ceph_string *old_ns;
ceph_file_layout_from_legacy(&ci->i_layout, &grant->layout);
ci->i_pool_ns_len = pool_ns_len;
if (ci->i_layout.pool_id != old_pool)
old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
lockdep_is_held(&ci->i_ceph_lock));
rcu_assign_pointer(ci->i_layout.pool_ns, *pns);
if (ci->i_layout.pool_id != old_pool || *pns != old_ns)
ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
*pns = old_ns;
/* size/truncate_seq? */
queue_trunc = ceph_fill_file_size(inode, issued,
le32_to_cpu(grant->truncate_seq),
@@ -3423,20 +3429,18 @@ void ceph_handle_caps(struct ceph_mds_session *session,
struct ceph_cap *cap;
struct ceph_mds_caps *h;
struct ceph_mds_cap_peer *peer = NULL;
struct ceph_snap_realm *realm;
struct ceph_snap_realm *realm = NULL;
struct ceph_string *pool_ns = NULL;
int mds = session->s_mds;
int op, issued;
u32 seq, mseq;
struct ceph_vino vino;
u64 cap_id;
u64 size, max_size;
u64 tid;
u64 inline_version = 0;
void *inline_data = NULL;
u32 inline_len = 0;
void *snaptrace;
size_t snaptrace_len;
u32 pool_ns_len = 0;
void *p, *end;
dout("handle_caps from mds%d\n", mds);
@@ -3450,11 +3454,8 @@ void ceph_handle_caps(struct ceph_mds_session *session,
op = le32_to_cpu(h->op);
vino.ino = le64_to_cpu(h->ino);
vino.snap = CEPH_NOSNAP;
cap_id = le64_to_cpu(h->cap_id);
seq = le32_to_cpu(h->seq);
mseq = le32_to_cpu(h->migrate_seq);
size = le64_to_cpu(h->size);
max_size = le64_to_cpu(h->max_size);
snaptrace = h + 1;
snaptrace_len = le32_to_cpu(h->snap_trace_len);
@@ -3493,6 +3494,7 @@ void ceph_handle_caps(struct ceph_mds_session *session,
u64 flush_tid;
u32 caller_uid, caller_gid;
u32 osd_epoch_barrier;
u32 pool_ns_len;
/* version >= 5 */
ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad);
/* version >= 6 */
@@ -3502,6 +3504,11 @@ void ceph_handle_caps(struct ceph_mds_session *session,
ceph_decode_32_safe(&p, end, caller_gid, bad);
/* version >= 8 */
ceph_decode_32_safe(&p, end, pool_ns_len, bad);
if (pool_ns_len > 0) {
ceph_decode_need(&p, end, pool_ns_len, bad);
pool_ns = ceph_find_or_create_string(p, pool_ns_len);
p += pool_ns_len;
}
}
/* lookup ino */
@@ -3522,7 +3529,7 @@ void ceph_handle_caps(struct ceph_mds_session *session,
cap = ceph_get_cap(mdsc, NULL);
cap->cap_ino = vino.ino;
cap->queue_release = 1;
cap->cap_id = cap_id;
cap->cap_id = le64_to_cpu(h->cap_id);
cap->mseq = mseq;
cap->seq = seq;
spin_lock(&session->s_cap_lock);
@@ -3557,10 +3564,9 @@ void ceph_handle_caps(struct ceph_mds_session *session,
}
handle_cap_import(mdsc, inode, h, peer, session,
&cap, &issued);
handle_cap_grant(mdsc, inode, h,
handle_cap_grant(mdsc, inode, h, &pool_ns,
inline_version, inline_data, inline_len,
msg->middle, session, cap, issued,
pool_ns_len);
msg->middle, session, cap, issued);
if (realm)
ceph_put_snap_realm(mdsc, realm);
goto done_unlocked;
@@ -3582,10 +3588,9 @@ void ceph_handle_caps(struct ceph_mds_session *session,
case CEPH_CAP_OP_GRANT:
__ceph_caps_issued(ci, &issued);
issued |= __ceph_caps_dirty(ci);
handle_cap_grant(mdsc, inode, h,
handle_cap_grant(mdsc, inode, h, &pool_ns,
inline_version, inline_data, inline_len,
msg->middle, session, cap, issued,
pool_ns_len);
msg->middle, session, cap, issued);
goto done_unlocked;
case CEPH_CAP_OP_FLUSH_ACK:
@@ -3616,6 +3621,7 @@ done:
mutex_unlock(&session->s_mutex);
done_unlocked:
iput(inode);
ceph_put_string(pool_ns);
return;
bad: