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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-05 21:58:08 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-05 21:58:08 (GMT)
commitc7eaf342ecb164d79275a6c1c93aef19293a4aaf (patch)
tree87df401e3a7ccf2263f569b90937170b231a2647 /fs
parent35004f2e55807a1a1491db24ab512dd2f770a130 (diff)
parent5ccedf1ccd710ba32f36986b49eeb764e53e7ef1 (diff)
Merge tag 'ceph-for-4.21-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov: "A fairly quiet round: a couple of messenger performance improvements from myself and a few cap handling fixes from Zheng" * tag 'ceph-for-4.21-rc1' of git://github.com/ceph/ceph-client: ceph: don't encode inode pathes into reconnect message ceph: update wanted caps after resuming stale session ceph: skip updating 'wanted' caps if caps are already issued ceph: don't request excl caps when mount is readonly ceph: don't update importing cap's mseq when handing cap export libceph: switch more to bool in ceph_tcp_sendmsg() libceph: use MSG_SENDPAGE_NOTLAST with ceph_tcp_sendpage() libceph: use sock_no_sendpage() as a fallback in ceph_tcp_sendpage() libceph: drop last_piece logic from write_partial_message_data() ceph: remove redundant assignment ceph: cleanup splice_dentry()
Diffstat (limited to 'fs')
-rw-r--r--fs/ceph/caps.c75
-rw-r--r--fs/ceph/inode.c60
-rw-r--r--fs/ceph/mds_client.c129
-rw-r--r--fs/ceph/mds_client.h16
-rw-r--r--fs/ceph/mdsmap.c1
5 files changed, 153 insertions, 128 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index f3496db..94c026b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -657,6 +657,9 @@ void ceph_add_cap(struct inode *inode,
session->s_nr_caps++;
spin_unlock(&session->s_cap_lock);
} else {
+ if (cap->cap_gen < session->s_cap_gen)
+ cap->issued = cap->implemented = CEPH_CAP_PIN;
+
/*
* auth mds of the inode changed. we received the cap export
* message, but still haven't received the cap import message.
@@ -1855,14 +1858,17 @@ retry_locked:
retain |= CEPH_CAP_ANY; /* be greedy */
} else if (S_ISDIR(inode->i_mode) &&
(issued & CEPH_CAP_FILE_SHARED) &&
- __ceph_dir_is_complete(ci)) {
+ __ceph_dir_is_complete(ci)) {
/*
* If a directory is complete, we want to keep
* the exclusive cap. So that MDS does not end up
* revoking the shared cap on every create/unlink
* operation.
*/
- want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
+ if (IS_RDONLY(inode))
+ want = CEPH_CAP_ANY_SHARED;
+ else
+ want = CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
retain |= want;
} else {
@@ -1970,8 +1976,7 @@ retry_locked:
goto ack;
/* things we might delay */
- if ((cap->issued & ~retain) == 0 &&
- cap->mds_wanted == want)
+ if ((cap->issued & ~retain) == 0)
continue; /* nope, all good */
if (no_delay)
@@ -3048,7 +3053,8 @@ static void handle_cap_grant(struct inode *inode,
int used, wanted, dirty;
u64 size = le64_to_cpu(grant->size);
u64 max_size = le64_to_cpu(grant->max_size);
- int check_caps = 0;
+ unsigned char check_caps = 0;
+ bool was_stale = cap->cap_gen < session->s_cap_gen;
bool wake = false;
bool writeback = false;
bool queue_trunc = false;
@@ -3063,21 +3069,6 @@ static void handle_cap_grant(struct inode *inode,
/*
- * auth mds of the inode changed. we received the cap export message,
- * but still haven't received the cap import message. handle_cap_export
- * updated the new auth MDS' cap.
- *
- * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
- * that was sent before the cap import message. So don't remove caps.
- */
- if (ceph_seq_cmp(seq, cap->seq) <= 0) {
- WARN_ON(cap != ci->i_auth_cap);
- WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id));
- seq = cap->seq;
- newcaps |= cap->issued;
- }
-
- /*
* If CACHE is being revoked, and we have no dirty buffers,
* try to invalidate (once). (If there are dirty buffers, we
* will invalidate _after_ writeback.)
@@ -3096,6 +3087,24 @@ static void handle_cap_grant(struct inode *inode,
}
}
+ if (was_stale)
+ cap->issued = cap->implemented = CEPH_CAP_PIN;
+
+ /*
+ * auth mds of the inode changed. we received the cap export message,
+ * but still haven't received the cap import message. handle_cap_export
+ * updated the new auth MDS' cap.
+ *
+ * "ceph_seq_cmp(seq, cap->seq) <= 0" means we are processing a message
+ * that was sent before the cap import message. So don't remove caps.
+ */
+ if (ceph_seq_cmp(seq, cap->seq) <= 0) {
+ WARN_ON(cap != ci->i_auth_cap);
+ WARN_ON(cap->cap_id != le64_to_cpu(grant->cap_id));
+ seq = cap->seq;
+ newcaps |= cap->issued;
+ }
+
/* side effects now are allowed */
cap->cap_gen = session->s_cap_gen;
cap->seq = seq;
@@ -3200,13 +3209,20 @@ static void handle_cap_grant(struct inode *inode,
ceph_cap_string(wanted),
ceph_cap_string(used),
ceph_cap_string(dirty));
- if (wanted != le32_to_cpu(grant->wanted)) {
- dout("mds wanted %s -> %s\n",
- ceph_cap_string(le32_to_cpu(grant->wanted)),
- ceph_cap_string(wanted));
- /* imported cap may not have correct mds_wanted */
- if (le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT)
- check_caps = 1;
+
+ if ((was_stale || le32_to_cpu(grant->op) == CEPH_CAP_OP_IMPORT) &&
+ (wanted & ~(cap->mds_wanted | newcaps))) {
+ /*
+ * If mds is importing cap, prior cap messages that update
+ * 'wanted' may get dropped by mds (migrate seq mismatch).
+ *
+ * We don't send cap message to update 'wanted' if what we
+ * want are already issued. If mds revokes caps, cap message
+ * that releases caps also tells mds what we want. But if
+ * caps got revoked by mds forcedly (session stale). We may
+ * haven't told mds what we want.
+ */
+ check_caps = 1;
}
/* revocation, grant, or no-op? */
@@ -3539,9 +3555,9 @@ retry:
goto out_unlock;
if (target < 0) {
- __ceph_remove_cap(cap, false);
- if (!ci->i_auth_cap)
+ if (cap->mds_wanted | cap->issued)
ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
+ __ceph_remove_cap(cap, false);
goto out_unlock;
}
@@ -3569,7 +3585,6 @@ retry:
tcap->cap_id = t_cap_id;
tcap->seq = t_seq - 1;
tcap->issue_seq = t_seq - 1;
- tcap->mseq = t_mseq;
tcap->issued |= issued;
tcap->implemented |= issued;
if (cap == ci->i_auth_cap)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 79dd5e6..9d1f34d 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1098,8 +1098,9 @@ out_unlock:
* splice a dentry to an inode.
* caller must hold directory i_mutex for this to be safe.
*/
-static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
+static int splice_dentry(struct dentry **pdn, struct inode *in)
{
+ struct dentry *dn = *pdn;
struct dentry *realdn;
BUG_ON(d_inode(dn));
@@ -1132,28 +1133,23 @@ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
if (IS_ERR(realdn)) {
pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
PTR_ERR(realdn), dn, in, ceph_vinop(in));
- dn = realdn;
- /*
- * Caller should release 'dn' in the case of error.
- * If 'req->r_dentry' is passed to this function,
- * caller should leave 'req->r_dentry' untouched.
- */
- goto out;
- } else if (realdn) {
+ return PTR_ERR(realdn);
+ }
+
+ if (realdn) {
dout("dn %p (%d) spliced with %p (%d) "
"inode %p ino %llx.%llx\n",
dn, d_count(dn),
realdn, d_count(realdn),
d_inode(realdn), ceph_vinop(d_inode(realdn)));
dput(dn);
- dn = realdn;
+ *pdn = realdn;
} else {
BUG_ON(!ceph_dentry(dn));
dout("dn %p attached to %p ino %llx.%llx\n",
dn, d_inode(dn), ceph_vinop(d_inode(dn)));
}
-out:
- return dn;
+ return 0;
}
/*
@@ -1340,7 +1336,12 @@ retry_lookup:
dout("dn %p gets new offset %lld\n", req->r_old_dentry,
ceph_dentry(req->r_old_dentry)->offset);
- dn = req->r_old_dentry; /* use old_dentry */
+ /* swap r_dentry and r_old_dentry in case that
+ * splice_dentry() gets called later. This is safe
+ * because no other place will use them */
+ req->r_dentry = req->r_old_dentry;
+ req->r_old_dentry = dn;
+ dn = req->r_dentry;
}
/* null dentry? */
@@ -1365,12 +1366,10 @@ retry_lookup:
if (d_really_is_negative(dn)) {
ceph_dir_clear_ordered(dir);
ihold(in);
- dn = splice_dentry(dn, in);
- if (IS_ERR(dn)) {
- err = PTR_ERR(dn);
+ err = splice_dentry(&req->r_dentry, in);
+ if (err < 0)
goto done;
- }
- req->r_dentry = dn; /* may have spliced */
+ dn = req->r_dentry; /* may have spliced */
} else if (d_really_is_positive(dn) && d_inode(dn) != in) {
dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
dn, d_inode(dn), ceph_vinop(d_inode(dn)),
@@ -1390,22 +1389,18 @@ retry_lookup:
} else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
req->r_op == CEPH_MDS_OP_MKSNAP) &&
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
- struct dentry *dn = req->r_dentry;
struct inode *dir = req->r_parent;
/* fill out a snapdir LOOKUPSNAP dentry */
- BUG_ON(!dn);
BUG_ON(!dir);
BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
- dout(" linking snapped dir %p to dn %p\n", in, dn);
+ BUG_ON(!req->r_dentry);
+ dout(" linking snapped dir %p to dn %p\n", in, req->r_dentry);
ceph_dir_clear_ordered(dir);
ihold(in);
- dn = splice_dentry(dn, in);
- if (IS_ERR(dn)) {
- err = PTR_ERR(dn);
+ err = splice_dentry(&req->r_dentry, in);
+ if (err < 0)
goto done;
- }
- req->r_dentry = dn; /* may have spliced */
} else if (rinfo->head->is_dentry) {
struct ceph_vino *ptvino = NULL;
@@ -1669,8 +1664,6 @@ retry_lookup:
}
if (d_really_is_negative(dn)) {
- struct dentry *realdn;
-
if (ceph_security_xattr_deadlock(in)) {
dout(" skip splicing dn %p to inode %p"
" (security xattr deadlock)\n", dn, in);
@@ -1679,13 +1672,9 @@ retry_lookup:
goto next_item;
}
- realdn = splice_dentry(dn, in);
- if (IS_ERR(realdn)) {
- err = PTR_ERR(realdn);
- d_drop(dn);
+ err = splice_dentry(&dn, in);
+ if (err < 0)
goto next_item;
- }
- dn = realdn;
}
ceph_dentry(dn)->offset = rde->offset;
@@ -1701,8 +1690,7 @@ retry_lookup:
err = ret;
}
next_item:
- if (dn)
- dput(dn);
+ dput(dn);
}
out:
if (err == 0 && skipped == 0) {
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index bd13a32..163fc74 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1232,13 +1232,13 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap,
dout("removing cap %p, ci is %p, inode is %p\n",
cap, ci, &ci->vfs_inode);
spin_lock(&ci->i_ceph_lock);
+ if (cap->mds_wanted | cap->issued)
+ ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
__ceph_remove_cap(cap, false);
if (!ci->i_auth_cap) {
struct ceph_cap_flush *cf;
struct ceph_mds_client *mdsc = fsc->mdsc;
- ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
-
if (ci->i_wrbuffer_ref > 0 &&
READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN)
invalidate = true;
@@ -1355,6 +1355,12 @@ static void remove_session_caps(struct ceph_mds_session *session)
dispose_cap_releases(session->s_mdsc, &dispose);
}
+enum {
+ RECONNECT,
+ RENEWCAPS,
+ FORCE_RO,
+};
+
/*
* wake up any threads waiting on this session's caps. if the cap is
* old (didn't get renewed on the client reconnect), remove it now.
@@ -1365,23 +1371,34 @@ static int wake_up_session_cb(struct inode *inode, struct ceph_cap *cap,
void *arg)
{
struct ceph_inode_info *ci = ceph_inode(inode);
+ unsigned long ev = (unsigned long)arg;
- if (arg) {
+ if (ev == RECONNECT) {
spin_lock(&ci->i_ceph_lock);
ci->i_wanted_max_size = 0;
ci->i_requested_max_size = 0;
spin_unlock(&ci->i_ceph_lock);
+ } else if (ev == RENEWCAPS) {
+ if (cap->cap_gen < cap->session->s_cap_gen) {
+ /* mds did not re-issue stale cap */
+ spin_lock(&ci->i_ceph_lock);
+ cap->issued = cap->implemented = CEPH_CAP_PIN;
+ /* make sure mds knows what we want */
+ if (__ceph_caps_file_wanted(ci) & ~cap->mds_wanted)
+ ci->i_ceph_flags |= CEPH_I_CAP_DROPPED;
+ spin_unlock(&ci->i_ceph_lock);
+ }
+ } else if (ev == FORCE_RO) {
}
wake_up_all(&ci->i_cap_wq);
return 0;
}
-static void wake_up_session_caps(struct ceph_mds_session *session,
- int reconnect)
+static void wake_up_session_caps(struct ceph_mds_session *session, int ev)
{
dout("wake_up_session_caps %p mds%d\n", session, session->s_mds);
iterate_session_caps(session, wake_up_session_cb,
- (void *)(unsigned long)reconnect);
+ (void *)(unsigned long)ev);
}
/*
@@ -1466,7 +1483,7 @@ static void renewed_caps(struct ceph_mds_client *mdsc,
spin_unlock(&session->s_cap_lock);
if (wake)
- wake_up_session_caps(session, 0);
+ wake_up_session_caps(session, RENEWCAPS);
}
/*
@@ -2847,7 +2864,7 @@ static void handle_session(struct ceph_mds_session *session,
spin_lock(&session->s_cap_lock);
session->s_readonly = true;
spin_unlock(&session->s_cap_lock);
- wake_up_session_caps(session, 0);
+ wake_up_session_caps(session, FORCE_RO);
break;
case CEPH_SESSION_REJECT:
@@ -2943,11 +2960,8 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
struct ceph_inode_info *ci = cap->ci;
struct ceph_reconnect_state *recon_state = arg;
struct ceph_pagelist *pagelist = recon_state->pagelist;
- char *path;
- int pathlen, err;
- u64 pathbase;
+ int err;
u64 snap_follows;
- struct dentry *dentry;
dout(" adding %p ino %llx.%llx cap %p %lld %s\n",
inode, ceph_vinop(inode), cap, cap->cap_id,
@@ -2956,19 +2970,6 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
if (err)
return err;
- dentry = d_find_alias(inode);
- if (dentry) {
- path = ceph_mdsc_build_path(dentry, &pathlen, &pathbase, 0);
- if (IS_ERR(path)) {
- err = PTR_ERR(path);
- goto out_dput;
- }
- } else {
- path = NULL;
- pathlen = 0;
- pathbase = 0;
- }
-
spin_lock(&ci->i_ceph_lock);
cap->seq = 0; /* reset cap seq */
cap->issue_seq = 0; /* and issue_seq */
@@ -2980,7 +2981,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
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.pathbase = 0;
rec.v2.flock_len = (__force __le32)
((ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) ? 0 : 1);
} else {
@@ -2991,7 +2992,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
ceph_encode_timespec64(&rec.v1.mtime, &inode->i_mtime);
ceph_encode_timespec64(&rec.v1.atime, &inode->i_atime);
rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino);
- rec.v1.pathbase = cpu_to_le64(pathbase);
+ rec.v1.pathbase = 0;
}
if (list_empty(&ci->i_cap_snaps)) {
@@ -3023,7 +3024,7 @@ encode_again:
GFP_NOFS);
if (!flocks) {
err = -ENOMEM;
- goto out_free;
+ goto out_err;
}
err = ceph_encode_locks_to_buffer(inode, flocks,
num_fcntl_locks,
@@ -3033,7 +3034,7 @@ encode_again:
flocks = NULL;
if (err == -ENOSPC)
goto encode_again;
- goto out_free;
+ goto out_err;
}
} else {
kfree(flocks);
@@ -3053,44 +3054,64 @@ encode_again:
sizeof(struct ceph_filelock);
rec.v2.flock_len = cpu_to_le32(struct_len);
- struct_len += sizeof(rec.v2);
- struct_len += sizeof(u32) + pathlen;
+ struct_len += sizeof(u32) + sizeof(rec.v2);
if (struct_v >= 2)
struct_len += sizeof(u64); /* snap_follows */
total_len += struct_len;
err = ceph_pagelist_reserve(pagelist, total_len);
+ if (err) {
+ kfree(flocks);
+ goto out_err;
+ }
- 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);
- if (struct_v >= 2)
- ceph_pagelist_encode_64(pagelist, snap_follows);
+ 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, NULL, 0);
+ ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2));
+ ceph_locks_to_pagelist(flocks, pagelist,
+ num_fcntl_locks, num_flock_locks);
+ if (struct_v >= 2)
+ ceph_pagelist_encode_64(pagelist, snap_follows);
+
kfree(flocks);
} else {
- 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));
+ u64 pathbase = 0;
+ int pathlen = 0;
+ char *path = NULL;
+ struct dentry *dentry;
+
+ dentry = d_find_alias(inode);
+ if (dentry) {
+ path = ceph_mdsc_build_path(dentry,
+ &pathlen, &pathbase, 0);
+ dput(dentry);
+ if (IS_ERR(path)) {
+ err = PTR_ERR(path);
+ goto out_err;
+ }
+ rec.v1.pathbase = cpu_to_le64(pathbase);
}
+
+ err = ceph_pagelist_reserve(pagelist,
+ pathlen + sizeof(u32) + sizeof(rec.v1));
+ if (err) {
+ kfree(path);
+ goto out_err;
+ }
+
+ ceph_pagelist_encode_string(pagelist, path, pathlen);
+ ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1));
+
+ kfree(path);
}
recon_state->nr_caps++;
-out_free:
- kfree(path);
-out_dput:
- dput(dentry);
+out_err:
return err;
}
@@ -3339,7 +3360,7 @@ static void check_new_map(struct ceph_mds_client *mdsc,
pr_info("mds%d recovery completed\n", s->s_mds);
kick_requests(mdsc, i);
ceph_kick_flushing_caps(mdsc, s);
- wake_up_session_caps(s, 1);
+ wake_up_session_caps(s, RECONNECT);
}
}
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 32fcce0..729da15 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -17,14 +17,16 @@
#include <linux/ceph/auth.h>
/* The first 8 bits are reserved for old ceph releases */
-#define CEPHFS_FEATURE_MIMIC 8
-
-#define CEPHFS_FEATURES_ALL { \
- 0, 1, 2, 3, 4, 5, 6, 7, \
- CEPHFS_FEATURE_MIMIC, \
+#define CEPHFS_FEATURE_MIMIC 8
+#define CEPHFS_FEATURE_REPLY_ENCODING 9
+#define CEPHFS_FEATURE_RECLAIM_CLIENT 10
+#define CEPHFS_FEATURE_LAZY_CAP_WANTED 11
+
+#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
+ 0, 1, 2, 3, 4, 5, 6, 7, \
+ CEPHFS_FEATURE_MIMIC, \
+ CEPHFS_FEATURE_LAZY_CAP_WANTED, \
}
-
-#define CEPHFS_FEATURES_CLIENT_SUPPORTED CEPHFS_FEATURES_ALL
#define CEPHFS_FEATURES_CLIENT_REQUIRED {}
diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c
index 44e53ab..1a2c5d3 100644
--- a/fs/ceph/mdsmap.c
+++ b/fs/ceph/mdsmap.c
@@ -35,7 +35,6 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
/* pick */
n = prandom_u32() % n;
- i = 0;
for (i = 0; n > 0; i++, n--)
while (m->m_info[i].state <= 0)
i++;

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