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-rw-r--r--fs/bio.c2
-rw-r--r--fs/hfs/brec.c18
-rw-r--r--fs/nfs/read.c5
-rw-r--r--fs/nfs/write.c8
-rw-r--r--fs/nfsd/nfsfh.c4
-rw-r--r--fs/ocfs2/cluster/tcp.c9
-rw-r--r--fs/ocfs2/dlm/dlmcommon.h21
-rw-r--r--fs/ocfs2/dlm/dlmconvert.c2
-rw-r--r--fs/ocfs2/dlm/dlmdomain.c103
-rw-r--r--fs/ocfs2/dlm/dlmmaster.c18
-rw-r--r--fs/ocfs2/dlm/dlmrecovery.c57
-rw-r--r--fs/ocfs2/dlm/dlmthread.c6
-rw-r--r--fs/ocfs2/dlmglue.c2
-rw-r--r--fs/ocfs2/resize.c2
-rw-r--r--fs/proc/base.c25
-rw-r--r--fs/proc/generic.c26
-rw-r--r--fs/proc/internal.h7
-rw-r--r--fs/proc/proc_net.c117
-rw-r--r--fs/proc/task_mmu.c18
19 files changed, 332 insertions, 118 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 3312fcc3c09..553b5b7960a 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1194,6 +1194,8 @@ EXPORT_SYMBOL(bio_hw_segments);
EXPORT_SYMBOL(bio_add_page);
EXPORT_SYMBOL(bio_add_pc_page);
EXPORT_SYMBOL(bio_get_nr_vecs);
+EXPORT_SYMBOL(bio_map_user);
+EXPORT_SYMBOL(bio_unmap_user);
EXPORT_SYMBOL(bio_map_kern);
EXPORT_SYMBOL(bio_pair_release);
EXPORT_SYMBOL(bio_split);
diff --git a/fs/hfs/brec.c b/fs/hfs/brec.c
index 878bf25dbc6..92fb358ce82 100644
--- a/fs/hfs/brec.c
+++ b/fs/hfs/brec.c
@@ -229,7 +229,7 @@ skip:
static struct hfs_bnode *hfs_bnode_split(struct hfs_find_data *fd)
{
struct hfs_btree *tree;
- struct hfs_bnode *node, *new_node;
+ struct hfs_bnode *node, *new_node, *next_node;
struct hfs_bnode_desc node_desc;
int num_recs, new_rec_off, new_off, old_rec_off;
int data_start, data_end, size;
@@ -248,6 +248,17 @@ static struct hfs_bnode *hfs_bnode_split(struct hfs_find_data *fd)
new_node->type = node->type;
new_node->height = node->height;
+ if (node->next)
+ next_node = hfs_bnode_find(tree, node->next);
+ else
+ next_node = NULL;
+
+ if (IS_ERR(next_node)) {
+ hfs_bnode_put(node);
+ hfs_bnode_put(new_node);
+ return next_node;
+ }
+
size = tree->node_size / 2 - node->num_recs * 2 - 14;
old_rec_off = tree->node_size - 4;
num_recs = 1;
@@ -261,6 +272,8 @@ static struct hfs_bnode *hfs_bnode_split(struct hfs_find_data *fd)
/* panic? */
hfs_bnode_put(node);
hfs_bnode_put(new_node);
+ if (next_node)
+ hfs_bnode_put(next_node);
return ERR_PTR(-ENOSPC);
}
@@ -315,8 +328,7 @@ static struct hfs_bnode *hfs_bnode_split(struct hfs_find_data *fd)
hfs_bnode_write(node, &node_desc, 0, sizeof(node_desc));
/* update next bnode header */
- if (new_node->next) {
- struct hfs_bnode *next_node = hfs_bnode_find(tree, new_node->next);
+ if (next_node) {
next_node->prev = new_node->this;
hfs_bnode_read(next_node, &node_desc, 0, sizeof(node_desc));
node_desc.prev = cpu_to_be32(next_node->prev);
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index be9e8270f4d..ab2f7d233e0 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -531,7 +531,10 @@ readpage_async_filler(void *data, struct page *page)
if (len < PAGE_CACHE_SIZE)
zero_user_segment(page, len, PAGE_CACHE_SIZE);
- nfs_pageio_add_request(desc->pgio, new);
+ if (!nfs_pageio_add_request(desc->pgio, new)) {
+ error = desc->pgio->pg_error;
+ goto out_unlock;
+ }
return 0;
out_error:
error = PTR_ERR(new);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 1667e398441..4cb88df12f8 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -39,6 +39,7 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context*,
unsigned int, unsigned int);
static void nfs_pageio_init_write(struct nfs_pageio_descriptor *desc,
struct inode *inode, int ioflags);
+static void nfs_redirty_request(struct nfs_page *req);
static const struct rpc_call_ops nfs_write_partial_ops;
static const struct rpc_call_ops nfs_write_full_ops;
static const struct rpc_call_ops nfs_commit_ops;
@@ -279,7 +280,12 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
BUG();
}
spin_unlock(&inode->i_lock);
- nfs_pageio_add_request(pgio, req);
+ if (!nfs_pageio_add_request(pgio, req)) {
+ nfs_redirty_request(req);
+ nfs_end_page_writeback(page);
+ nfs_clear_page_tag_locked(req);
+ return pgio->pg_error;
+ }
return 0;
}
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 1eb771d79cc..3e6b3f41ee1 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -232,6 +232,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
fhp->fh_dentry = dentry;
fhp->fh_export = exp;
nfsd_nr_verified++;
+ cache_get(&exp->h);
} else {
/*
* just rechecking permissions
@@ -241,6 +242,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
dprintk("nfsd: fh_verify - just checking\n");
dentry = fhp->fh_dentry;
exp = fhp->fh_export;
+ cache_get(&exp->h);
/*
* Set user creds for this exportpoint; necessary even
* in the "just checking" case because this may be a
@@ -252,8 +254,6 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
if (error)
goto out;
}
- cache_get(&exp->h);
-
error = nfsd_mode_check(rqstp, dentry->d_inode->i_mode, type);
if (error)
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index ee50c9610e7..b8057c51b20 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -451,9 +451,9 @@ static void o2net_set_nn_state(struct o2net_node *nn,
/* delay if we're withing a RECONNECT_DELAY of the
* last attempt */
delay = (nn->nn_last_connect_attempt +
- msecs_to_jiffies(o2net_reconnect_delay(sc->sc_node)))
+ msecs_to_jiffies(o2net_reconnect_delay(NULL)))
- jiffies;
- if (delay > msecs_to_jiffies(o2net_reconnect_delay(sc->sc_node)))
+ if (delay > msecs_to_jiffies(o2net_reconnect_delay(NULL)))
delay = 0;
mlog(ML_CONN, "queueing conn attempt in %lu jiffies\n", delay);
queue_delayed_work(o2net_wq, &nn->nn_connect_work, delay);
@@ -1552,12 +1552,11 @@ static void o2net_connect_expired(struct work_struct *work)
spin_lock(&nn->nn_lock);
if (!nn->nn_sc_valid) {
- struct o2nm_node *node = nn->nn_sc->sc_node;
mlog(ML_ERROR, "no connection established with node %u after "
"%u.%u seconds, giving up and returning errors.\n",
o2net_num_from_nn(nn),
- o2net_idle_timeout(node) / 1000,
- o2net_idle_timeout(node) % 1000);
+ o2net_idle_timeout(NULL) / 1000,
+ o2net_idle_timeout(NULL) % 1000);
o2net_set_nn_state(nn, NULL, 0, -ENOTCONN);
}
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 9843ee17ea2..dc8ea666efd 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -176,6 +176,7 @@ struct dlm_mig_lockres_priv
{
struct dlm_lock_resource *lockres;
u8 real_master;
+ u8 extra_ref;
};
struct dlm_assert_master_priv
@@ -602,17 +603,19 @@ enum dlm_query_join_response_code {
JOIN_PROTOCOL_MISMATCH,
};
+struct dlm_query_join_packet {
+ u8 code; /* Response code. dlm_minor and fs_minor
+ are only valid if this is JOIN_OK */
+ u8 dlm_minor; /* The minor version of the protocol the
+ dlm is speaking. */
+ u8 fs_minor; /* The minor version of the protocol the
+ filesystem is speaking. */
+ u8 reserved;
+};
+
union dlm_query_join_response {
u32 intval;
- struct {
- u8 code; /* Response code. dlm_minor and fs_minor
- are only valid if this is JOIN_OK */
- u8 dlm_minor; /* The minor version of the protocol the
- dlm is speaking. */
- u8 fs_minor; /* The minor version of the protocol the
- filesystem is speaking. */
- u8 reserved;
- } packet;
+ struct dlm_query_join_packet packet;
};
struct dlm_lock_request
diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c
index ecb4d997221..75997b4deaf 100644
--- a/fs/ocfs2/dlm/dlmconvert.c
+++ b/fs/ocfs2/dlm/dlmconvert.c
@@ -487,7 +487,7 @@ int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
"cookie=%u:%llu\n",
dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)),
dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie)));
- __dlm_print_one_lock_resource(res);
+ dlm_print_one_lock_resource(res);
goto leave;
}
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 638d2ebb892..0879d86113e 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -713,14 +713,46 @@ static int dlm_query_join_proto_check(char *proto_type, int node,
return rc;
}
+/*
+ * struct dlm_query_join_packet is made up of four one-byte fields. They
+ * are effectively in big-endian order already. However, little-endian
+ * machines swap them before putting the packet on the wire (because
+ * query_join's response is a status, and that status is treated as a u32
+ * on the wire). Thus, a big-endian and little-endian machines will treat
+ * this structure differently.
+ *
+ * The solution is to have little-endian machines swap the structure when
+ * converting from the structure to the u32 representation. This will
+ * result in the structure having the correct format on the wire no matter
+ * the host endian format.
+ */
+static void dlm_query_join_packet_to_wire(struct dlm_query_join_packet *packet,
+ u32 *wire)
+{
+ union dlm_query_join_response response;
+
+ response.packet = *packet;
+ *wire = cpu_to_be32(response.intval);
+}
+
+static void dlm_query_join_wire_to_packet(u32 wire,
+ struct dlm_query_join_packet *packet)
+{
+ union dlm_query_join_response response;
+
+ response.intval = cpu_to_be32(wire);
+ *packet = response.packet;
+}
+
static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data)
{
struct dlm_query_join_request *query;
- union dlm_query_join_response response = {
- .packet.code = JOIN_DISALLOW,
+ struct dlm_query_join_packet packet = {
+ .code = JOIN_DISALLOW,
};
struct dlm_ctxt *dlm = NULL;
+ u32 response;
u8 nodenum;
query = (struct dlm_query_join_request *) msg->buf;
@@ -737,11 +769,11 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
mlog(0, "node %u is not in our live map yet\n",
query->node_idx);
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
goto respond;
}
- response.packet.code = JOIN_OK_NO_MAP;
+ packet.code = JOIN_OK_NO_MAP;
spin_lock(&dlm_domain_lock);
dlm = __dlm_lookup_domain_full(query->domain, query->name_len);
@@ -760,7 +792,7 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
mlog(0, "disallow join as node %u does not "
"have node %u in its nodemap\n",
query->node_idx, nodenum);
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
goto unlock_respond;
}
}
@@ -780,23 +812,23 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
/*If this is a brand new context and we
* haven't started our join process yet, then
* the other node won the race. */
- response.packet.code = JOIN_OK_NO_MAP;
+ packet.code = JOIN_OK_NO_MAP;
} else if (dlm->joining_node != DLM_LOCK_RES_OWNER_UNKNOWN) {
/* Disallow parallel joins. */
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
} else if (dlm->reco.state & DLM_RECO_STATE_ACTIVE) {
mlog(0, "node %u trying to join, but recovery "
"is ongoing.\n", bit);
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
} else if (test_bit(bit, dlm->recovery_map)) {
mlog(0, "node %u trying to join, but it "
"still needs recovery.\n", bit);
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
} else if (test_bit(bit, dlm->domain_map)) {
mlog(0, "node %u trying to join, but it "
"is still in the domain! needs recovery?\n",
bit);
- response.packet.code = JOIN_DISALLOW;
+ packet.code = JOIN_DISALLOW;
} else {
/* Alright we're fully a part of this domain
* so we keep some state as to who's joining
@@ -807,19 +839,15 @@ static int dlm_query_join_handler(struct o2net_msg *msg, u32 len, void *data,
if (dlm_query_join_proto_check("DLM", bit,
&dlm->dlm_locking_proto,
&query->dlm_proto)) {
- response.packet.code =
- JOIN_PROTOCOL_MISMATCH;
+ packet.code = JOIN_PROTOCOL_MISMATCH;
} else if (dlm_query_join_proto_check("fs", bit,
&dlm->fs_locking_proto,
&query->fs_proto)) {
- response.packet.code =
- JOIN_PROTOCOL_MISMATCH;
+ packet.code = JOIN_PROTOCOL_MISMATCH;
} else {
- response.packet.dlm_minor =
- query->dlm_proto.pv_minor;
- response.packet.fs_minor =
- query->fs_proto.pv_minor;
- response.packet.code = JOIN_OK;
+ packet.dlm_minor = query->dlm_proto.pv_minor;
+ packet.fs_minor = query->fs_proto.pv_minor;
+ packet.code = JOIN_OK;
__dlm_set_joining_node(dlm, query->node_idx);
}
}
@@ -830,9 +858,10 @@ unlock_respond:
spin_unlock(&dlm_domain_lock);
respond:
- mlog(0, "We respond with %u\n", response.packet.code);
+ mlog(0, "We respond with %u\n", packet.code);
- return response.intval;
+ dlm_query_join_packet_to_wire(&packet, &response);
+ return response;
}
static int dlm_assert_joined_handler(struct o2net_msg *msg, u32 len, void *data,
@@ -937,7 +966,7 @@ static int dlm_send_join_cancels(struct dlm_ctxt *dlm,
sizeof(unsigned long))) {
mlog(ML_ERROR,
"map_size %u != BITS_TO_LONGS(O2NM_MAX_NODES) %u\n",
- map_size, BITS_TO_LONGS(O2NM_MAX_NODES));
+ map_size, (unsigned)BITS_TO_LONGS(O2NM_MAX_NODES));
return -EINVAL;
}
@@ -968,7 +997,8 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
{
int status;
struct dlm_query_join_request join_msg;
- union dlm_query_join_response join_resp;
+ struct dlm_query_join_packet packet;
+ u32 join_resp;
mlog(0, "querying node %d\n", node);
@@ -984,11 +1014,12 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
status = o2net_send_message(DLM_QUERY_JOIN_MSG, DLM_MOD_KEY, &join_msg,
sizeof(join_msg), node,
- &join_resp.intval);
+ &join_resp);
if (status < 0 && status != -ENOPROTOOPT) {
mlog_errno(status);
goto bail;
}
+ dlm_query_join_wire_to_packet(join_resp, &packet);
/* -ENOPROTOOPT from the net code means the other side isn't
listening for our message type -- that's fine, it means
@@ -997,10 +1028,10 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
if (status == -ENOPROTOOPT) {
status = 0;
*response = JOIN_OK_NO_MAP;
- } else if (join_resp.packet.code == JOIN_DISALLOW ||
- join_resp.packet.code == JOIN_OK_NO_MAP) {
- *response = join_resp.packet.code;
- } else if (join_resp.packet.code == JOIN_PROTOCOL_MISMATCH) {
+ } else if (packet.code == JOIN_DISALLOW ||
+ packet.code == JOIN_OK_NO_MAP) {
+ *response = packet.code;
+ } else if (packet.code == JOIN_PROTOCOL_MISMATCH) {
mlog(ML_NOTICE,
"This node requested DLM locking protocol %u.%u and "
"filesystem locking protocol %u.%u. At least one of "
@@ -1012,14 +1043,12 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
dlm->fs_locking_proto.pv_minor,
node);
status = -EPROTO;
- *response = join_resp.packet.code;
- } else if (join_resp.packet.code == JOIN_OK) {
- *response = join_resp.packet.code;
+ *response = packet.code;
+ } else if (packet.code == JOIN_OK) {
+ *response = packet.code;
/* Use the same locking protocol as the remote node */
- dlm->dlm_locking_proto.pv_minor =
- join_resp.packet.dlm_minor;
- dlm->fs_locking_proto.pv_minor =
- join_resp.packet.fs_minor;
+ dlm->dlm_locking_proto.pv_minor = packet.dlm_minor;
+ dlm->fs_locking_proto.pv_minor = packet.fs_minor;
mlog(0,
"Node %d responds JOIN_OK with DLM locking protocol "
"%u.%u and fs locking protocol %u.%u\n",
@@ -1031,11 +1060,11 @@ static int dlm_request_join(struct dlm_ctxt *dlm,
} else {
status = -EINVAL;
mlog(ML_ERROR, "invalid response %d from node %u\n",
- join_resp.packet.code, node);
+ packet.code, node);
}
mlog(0, "status %d, node %d response is %d\n", status, node,
- *response);
+ *response);
bail:
return status;
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index c92d1b19fc0..ea6b8957786 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -1663,7 +1663,12 @@ way_up_top:
dlm_put_mle(tmpmle);
}
send_response:
-
+ /*
+ * __dlm_lookup_lockres() grabbed a reference to this lockres.
+ * The reference is released by dlm_assert_master_worker() under
+ * the call to dlm_dispatch_assert_master(). If
+ * dlm_assert_master_worker() isn't called, we drop it here.
+ */
if (dispatch_assert) {
if (response != DLM_MASTER_RESP_YES)
mlog(ML_ERROR, "invalid response %d\n", response);
@@ -1678,7 +1683,11 @@ send_response:
if (ret < 0) {
mlog(ML_ERROR, "failed to dispatch assert master work\n");
response = DLM_MASTER_RESP_ERROR;
+ dlm_lockres_put(res);
}
+ } else {
+ if (res)
+ dlm_lockres_put(res);
}
dlm_put(dlm);
@@ -2348,7 +2357,7 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref "
"but it is already dropped!\n", dlm->name,
res->lockname.len, res->lockname.name, node);
- __dlm_print_one_lock_resource(res);
+ dlm_print_one_lock_resource(res);
}
ret = 0;
goto done;
@@ -2408,7 +2417,7 @@ static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data)
mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref "
"but it is already dropped!\n", dlm->name,
res->lockname.len, res->lockname.name, node);
- __dlm_print_one_lock_resource(res);
+ dlm_print_one_lock_resource(res);
}
dlm_lockres_put(res);
@@ -2933,6 +2942,9 @@ static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm,
dlm_lockres_clear_refmap_bit(lock->ml.node, res);
list_del_init(&lock->list);
dlm_lock_put(lock);
+ /* In a normal unlock, we would have added a
+ * DLM_UNLOCK_FREE_LOCK action. Force it. */
+ dlm_lock_put(lock);
}
}
queue++;
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 91f747b8a53..bcb9260c373 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -519,9 +519,9 @@ static int dlm_do_recovery(struct dlm_ctxt *dlm)
return 0;
master_here:
- mlog(0, "(%d) mastering recovery of %s:%u here(this=%u)!\n",
- task_pid_nr(dlm->dlm_reco_thread_task),
- dlm->name, dlm->reco.dead_node, dlm->node_num);
+ mlog(ML_NOTICE, "(%d) Node %u is the Recovery Master for the Dead Node "
+ "%u for Domain %s\n", task_pid_nr(dlm->dlm_reco_thread_task),
+ dlm->node_num, dlm->reco.dead_node, dlm->name);
status = dlm_remaster_locks(dlm, dlm->reco.dead_node);
if (status < 0) {
@@ -1191,7 +1191,7 @@ static int dlm_add_lock_to_array(struct dlm_lock *lock,
(ml->type == LKM_EXMODE ||
memcmp(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN))) {
mlog(ML_ERROR, "mismatched lvbs!\n");
- __dlm_print_one_lock_resource(lock->lockres);
+ dlm_print_one_lock_resource(lock->lockres);
BUG();
}
memcpy(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN);
@@ -1327,6 +1327,7 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
(struct dlm_migratable_lockres *)msg->buf;
int ret = 0;
u8 real_master;
+ u8 extra_refs = 0;
char *buf = NULL;
struct dlm_work_item *item = NULL;
struct dlm_lock_resource *res = NULL;
@@ -1404,16 +1405,28 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
__dlm_insert_lockres(dlm, res);
spin_unlock(&dlm->spinlock);
+ /* Add an extra ref for this lock-less lockres lest the
+ * dlm_thread purges it before we get the chance to add
+ * locks to it */
+ dlm_lockres_get(res);
+
+ /* There are three refs that need to be put.
+ * 1. Taken above.
+ * 2. kref_init in dlm_new_lockres()->dlm_init_lockres().
+ * 3. dlm_lookup_lockres()
+ * The first one is handled at the end of this function. The
+ * other two are handled in the worker thread after locks have
+ * been attached. Yes, we don't wait for purge time to match
+ * kref_init. The lockres will still have atleast one ref
+ * added because it is in the hash __dlm_insert_lockres() */
+ extra_refs++;
+
/* now that the new lockres is inserted,
* make it usable by other processes */
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
spin_unlock(&res->spinlock);
wake_up(&res->wq);
-
- /* add an extra ref for just-allocated lockres
- * otherwise the lockres will be purged immediately */
- dlm_lockres_get(res);
}
/* at this point we have allocated everything we need,
@@ -1443,12 +1456,17 @@ int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
dlm_init_work_item(dlm, item, dlm_mig_lockres_worker, buf);
item->u.ml.lockres = res; /* already have a ref */
item->u.ml.real_master = real_master;
+ item->u.ml.extra_ref = extra_refs;
spin_lock(&dlm->work_lock);
list_add_tail(&item->list, &dlm->work_list);
spin_unlock(&dlm->work_lock);
queue_work(dlm->dlm_worker, &dlm->dispatched_work);
leave:
+ /* One extra ref taken needs to be put here */
+ if (extra_refs)
+ dlm_lockres_put(res);
+
dlm_put(dlm);
if (ret < 0) {
if (buf)
@@ -1464,17 +1482,19 @@ leave:
static void dlm_mig_lockres_worker(struct dlm_work_item *item, void *data)
{
- struct dlm_ctxt *dlm = data;
+ struct dlm_ctxt *dlm;
struct dlm_migratable_lockres *mres;
int ret = 0;
struct dlm_lock_resource *res;
u8 real_master;
+ u8 extra_ref;
dlm = item->dlm;
mres = (struct dlm_migratable_lockres *)data;
res = item->u.ml.lockres;
real_master = item->u.ml.real_master;
+ extra_ref = item->u.ml.extra_ref;
if (real_master == DLM_LOCK_RES_OWNER_UNKNOWN) {
/* this case is super-rare. only occurs if
@@ -1517,6 +1537,12 @@ again:
}
leave:
+ /* See comment in dlm_mig_lockres_handler() */
+ if (res) {
+ if (extra_ref)
+ dlm_lockres_put(res);
+ dlm_lockres_put(res);
+ }
kfree(data);
mlog_exit(ret);
}
@@ -1644,7 +1670,8 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
/* retry!? */
BUG();
}
- }
+ } else /* put.. incase we are not the master */
+ dlm_lockres_put(res);
spin_unlock(&res->spinlock);
}
spin_unlock(&dlm->spinlock);
@@ -1921,6 +1948,7 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
"Recovering res %s:%.*s, is already on recovery list!\n",
dlm->name, res->lockname.len, res->lockname.name);
list_del_init(&res->recovering);
+ dlm_lockres_put(res);
}
/* We need to hold a reference while on the recovery list */
dlm_lockres_get(res);
@@ -2130,11 +2158,16 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
assert_spin_locked(&dlm->spinlock);
assert_spin_locked(&res->spinlock);
+ /* We do two dlm_lock_put(). One for removing from list and the other is
+ * to force the DLM_UNLOCK_FREE_LOCK action so as to free the locks */
+
/* TODO: check pending_asts, pending_basts here */
list_for_each_entry_safe(lock, next, &res->granted, list) {
if (lock->ml.node == dead_node) {
list_del_init(&lock->list);
dlm_lock_put(lock);
+ /* Can't schedule DLM_UNLOCK_FREE_LOCK - do manually */
+ dlm_lock_put(lock);
freed++;
}
}
@@ -2142,6 +2175,8 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
if (lock->ml.node == dead_node) {
list_del_init(&lock->list);
dlm_lock_put(lock);
+ /* Can't schedule DLM_UNLOCK_FREE_LOCK - do manually */
+ dlm_lock_put(lock);
freed++;
}
}
@@ -2149,6 +2184,8 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
if (lock->ml.node == dead_node) {
list_del_init(&lock->list);
dlm_lock_put(lock);
+ /* Can't schedule DLM_UNLOCK_FREE_LOCK - do manually */
+ dlm_lock_put(lock);
freed++;
}
}
diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
index cebd089f895..4060bb328bc 100644
--- a/fs/ocfs2/dlm/dlmthread.c
+++ b/fs/ocfs2/dlm/dlmthread.c
@@ -176,12 +176,14 @@ static int dlm_purge_lockres(struct dlm_ctxt *dlm,
res->lockname.name, master);
if (!master) {
+ /* drop spinlock... retake below */
+ spin_unlock(&dlm->spinlock);
+
spin_lock(&res->spinlock);
/* This ensures that clear refmap is sent after the set */
__dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG);
spin_unlock(&res->spinlock);
- /* drop spinlock to do messaging, retake below */
- spin_unlock(&dlm->spinlock);
+
/* clear our bit from the master's refmap, ignore errors */
ret = dlm_drop_lockres_ref(dlm, res);
if (ret < 0) {
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index f7794306b2b..1f1873bf41f 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2409,7 +2409,7 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
return 0;
}
-static struct seq_operations ocfs2_dlm_seq_ops = {
+static const struct seq_operations ocfs2_dlm_seq_ops = {
.start = ocfs2_dlm_seq_start,
.stop = ocfs2_dlm_seq_stop,
.next = ocfs2_dlm_seq_next,
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index 37835ffcb03..8166968e901 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -597,7 +597,7 @@ int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
memset(cr, 0, sizeof(struct ocfs2_chain_rec));
}
- cr->c_blkno = le64_to_cpu(input->group);
+ cr->c_blkno = cpu_to_le64(input->group);
le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
le32_add_cpu(&cr->c_free, input->frees * cl_bpc);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 91a1bd67ac1..8a10f6fe24a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1036,6 +1036,26 @@ static const struct file_operations proc_loginuid_operations = {
.read = proc_loginuid_read,
.write = proc_loginuid_write,
};
+
+static ssize_t proc_sessionid_read(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode * inode = file->f_path.dentry->d_inode;
+ struct task_struct *task = get_proc_task(inode);
+ ssize_t length;
+ char tmpbuf[TMPBUFLEN];
+
+ if (!task)
+ return -ESRCH;
+ length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
+ audit_get_sessionid(task));
+ put_task_struct(task);
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static const struct file_operations proc_sessionid_operations = {
+ .read = proc_sessionid_read,
+};
#endif
#ifdef CONFIG_FAULT_INJECTION
@@ -2269,6 +2289,9 @@ static const struct pid_entry tgid_base_stuff[] = {
DIR("task", S_IRUGO|S_IXUGO, task),
DIR("fd", S_IRUSR|S_IXUSR, fd),
DIR("fdinfo", S_IRUSR|S_IXUSR, fdinfo),
+#ifdef CONFIG_NET
+ DIR("net", S_IRUGO|S_IXUSR, net),
+#endif
REG("environ", S_IRUSR, environ),
INF("auxv", S_IRUSR, pid_auxv),
ONE("status", S_IRUGO, pid_status),
@@ -2316,6 +2339,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
+ REG("sessionid", S_IRUSR, sessionid),
#endif
#ifdef CONFIG_FAULT_INJECTION
REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
@@ -2646,6 +2670,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("oom_adj", S_IRUGO|S_IWUSR, oom_adjust),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, loginuid),
+ REG("sessionid", S_IRUSR, sessionid),
#endif
#ifdef CONFIG_FAULT_INJECTION
REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 68971e66cd4..a36ad3c75cf 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -377,15 +377,14 @@ static struct dentry_operations proc_dentry_operations =
* Don't create negative dentries here, return -ENOENT by hand
* instead.
*/
-struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir,
+ struct dentry *dentry)
{
struct inode *inode = NULL;
- struct proc_dir_entry * de;
int error = -ENOENT;
lock_kernel();
spin_lock(&proc_subdir_lock);
- de = PDE(dir);
if (de) {
for (de = de->subdir; de ; de = de->next) {
if (de->namelen != dentry->d_name.len)
@@ -393,8 +392,6 @@ struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nam
if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
unsigned int ino;
- if (de->shadow_proc)
- de = de->shadow_proc(current, de);
ino = de->low_ino;
de_get(de);
spin_unlock(&proc_subdir_lock);
@@ -417,6 +414,12 @@ out_unlock:
return ERR_PTR(error);
}
+struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
+ return proc_lookup_de(PDE(dir), dir, dentry);
+}
+
/*
* This returns non-zero if at EOF, so that the /proc
* root directory can use this and check if it should
@@ -426,10 +429,9 @@ out_unlock:
* value of the readdir() call, as long as it's non-negative
* for success..
*/
-int proc_readdir(struct file * filp,
- void * dirent, filldir_t filldir)
+int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
+ filldir_t filldir)
{
- struct proc_dir_entry * de;
unsigned int ino;
int i;
struct inode *inode = filp->f_path.dentry->d_inode;
@@ -438,7 +440,6 @@ int proc_readdir(struct file * filp,
lock_kernel();
ino = inode->i_ino;
- de = PDE(inode);
if (!de) {
ret = -EINVAL;
goto out;
@@ -499,6 +500,13 @@ out: unlock_kernel();
return ret;
}
+int proc_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+ struct inode *inode = filp->f_path.dentry->d_inode;
+
+ return proc_readdir_de(PDE(inode), filp, dirent, filldir);
+}
+
/*
* These are the generic /proc directory operations. They
* use the in-memory "struct proc_dir_entry" tree to parse
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 1c81c8f1aee..bc72f5c8c47 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -64,6 +64,8 @@ extern const struct file_operations proc_numa_maps_operations;
extern const struct file_operations proc_smaps_operations;
extern const struct file_operations proc_clear_refs_operations;
extern const struct file_operations proc_pagemap_operations;
+extern const struct file_operations proc_net_operations;
+extern const struct inode_operations proc_net_inode_operations;
void free_proc_entry(struct proc_dir_entry *de);
@@ -83,3 +85,8 @@ static inline int proc_fd(struct inode *inode)
{
return PROC_I(inode)->fd;
}
+
+struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
+ struct dentry *dentry);
+int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
+ filldir_t filldir);
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 14e9b5aaf86..4caa5f774fb 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -63,6 +63,82 @@ int seq_release_net(struct inode *ino, struct file *f)
}
EXPORT_SYMBOL_GPL(seq_release_net);
+static struct net *get_proc_task_net(struct inode *dir)
+{
+ struct task_struct *task;
+ struct nsproxy *ns;
+ struct net *net = NULL;
+
+ rcu_read_lock();
+ task = pid_task(proc_pid(dir), PIDTYPE_PID);
+ if (task != NULL) {
+ ns = task_nsproxy(task);
+ if (ns != NULL)
+ net = get_net(ns->net_ns);
+ }
+ rcu_read_unlock();
+
+ return net;
+}
+
+static struct dentry *proc_tgid_net_lookup(struct inode *dir,
+ struct dentry *dentry, struct nameidata *nd)
+{
+ struct dentry *de;
+ struct net *net;
+
+ de = ERR_PTR(-ENOENT);
+ net = get_proc_task_net(dir);
+ if (net != NULL) {
+ de = proc_lookup_de(net->proc_net, dir, dentry);
+ put_net(net);
+ }
+ return de;
+}
+
+static int proc_tgid_net_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+ struct net *net;
+
+ net = get_proc_task_net(inode);
+
+ generic_fillattr(inode, stat);
+
+ if (net != NULL) {
+ stat->nlink = net->proc_net->nlink;
+ put_net(net);
+ }
+
+ return 0;
+}
+
+const struct inode_operations proc_net_inode_operations = {
+ .lookup = proc_tgid_net_lookup,
+ .getattr = proc_tgid_net_getattr,
+};
+
+static int proc_tgid_net_readdir(struct file *filp, void *dirent,
+ filldir_t filldir)
+{
+ int ret;
+ struct net *net;
+
+ ret = -EINVAL;
+ net = get_proc_task_net(filp->f_path.dentry->d_inode);
+ if (net != NULL) {
+ ret = proc_readdir_de(net->proc_net, filp, dirent, filldir);
+ put_net(net);
+ }
+ return ret;
+}
+
+const struct file_operations proc_net_operations = {
+ .read = generic_read_dir,
+ .readdir = proc_tgid_net_readdir,
+};
+
struct proc_dir_entry *proc_net_fops_create(struct net *net,
const char *name, mode_t mode, const struct file_operations *fops)
@@ -83,14 +159,6 @@ struct net *get_proc_net(const struct inode *inode)
}
EXPORT_SYMBOL_GPL(get_proc_net);
-static struct proc_dir_entry *shadow_pde;
-
-static struct proc_dir_entry *proc_net_shadow(struct task_struct *task,
- struct proc_dir_entry *de)
-{
- return task->nsproxy->net_ns->proc_net;
-}
-
struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
struct proc_dir_entry *parent)
{
@@ -104,45 +172,39 @@ EXPORT_SYMBOL_GPL(proc_net_mkdir);
static __net_init int proc_net_ns_init(struct net *net)
{
- struct proc_dir_entry *root, *netd, *net_statd;
+ struct proc_dir_entry *netd, *net_statd;
int err;
err = -ENOMEM;
- root = kzalloc(sizeof(*root), GFP_KERNEL);
- if (!root)
+ netd = kzalloc(sizeof(*netd), GFP_KERNEL);
+ if (!netd)
goto out;
- err = -EEXIST;
- netd = proc_net_mkdir(net, "net", root);
- if (!netd)
- goto free_root;
+ netd->data = net;
+ netd->nlink = 2;
+ netd->name = "net";
+ netd->namelen = 3;
+ netd->parent = &proc_root;
err = -EEXIST;
net_statd = proc_net_mkdir(net, "stat", netd);
if (!net_statd)
goto free_net;
- root->data = net;
-
- net->proc_net_root = root;
net->proc_net = netd;
net->proc_net_stat = net_statd;
- err = 0;
+ return 0;
+free_net:
+ kfree(netd);
out:
return err;
-free_net:
- remove_proc_entry("net", root);
-free_root:
- kfree(root);
- goto out;
}
static __net_exit void proc_net_ns_exit(struct net *net)
{
remove_proc_entry("stat", net->proc_net);
- remove_proc_entry("net", net->proc_net_root);
- kfree(net->proc_net_root);
+ kfree(net->proc_net);
}
static struct pernet_operations __net_initdata proc_net_ns_ops = {
@@ -152,8 +214,7 @@ static struct pernet_operations __net_initdata proc_net_ns_ops = {
int __init proc_net_init(void)
{
- shadow_pde = proc_mkdir("net", NULL);
- shadow_pde->shadow_proc = proc_net_shadow;
+ proc_symlink("net", NULL, "self/net");
return register_pernet_subsys(&proc_net_ns_ops);
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 6dc0334815f..4206454734e 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -640,17 +640,17 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
ret = -EACCES;
if (!ptrace_may_attach(task))
- goto out;
+ goto out_task;
ret = -EINVAL;
/* file position must be aligned */
if (*ppos % PM_ENTRY_BYTES)
- goto out;
+ goto out_task;
ret = 0;
mm = get_task_mm(task);
if (!mm)
- goto out;
+ goto out_task;
ret = -ENOMEM;
uaddr = (unsigned long)buf & PAGE_MASK;
@@ -658,7 +658,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE;
pages = kmalloc(pagecount * sizeof(struct page *), GFP_KERNEL);
if (!pages)
- goto out_task;
+ goto out_mm;
down_read(&current->mm->mmap_sem);
ret = get_user_pages(current, current->mm, uaddr, pagecount,
@@ -668,6 +668,12 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
if (ret < 0)
goto out_free;
+ if (ret != pagecount) {
+ pagecount = ret;
+ ret = -EFAULT;
+ goto out_pages;
+ }
+
pm.out = buf;
pm.end = buf + count;
@@ -699,15 +705,17 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
ret = pm.out - buf;
}
+out_pages:
for (; pagecount; pagecount--) {
page = pages[pagecount-1];
if (!PageReserved(page))
SetPageDirty(page);
page_cache_release(page);
}
- mmput(mm);
out_free:
kfree(pages);
+out_mm:
+ mmput(mm);
out_task:
put_task_struct(task);
out:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-17 07:58:46 +0000