From 2d7cf8ef75abbe0d33d9115872d4545e9cefced2 Mon Sep 17 00:00:00 2001 From: Evgeniy Polyakov Date: Fri, 28 Aug 2009 17:57:58 +0400 Subject: [PATCH] Staging: pohmelfs: sync with the development tree * cache coherency protocol fix * proper timeout handling * implement dump/del all config group command (Signed-off-by: Pierpaolo Giacomin ) Signed-off-by: Evgeniy Polyakov Signed-off-by: Greg Kroah-Hartman --- drivers/staging/pohmelfs/config.c | 98 +++++++++++++++++++++++++++++-- drivers/staging/pohmelfs/crypto.c | 4 +- drivers/staging/pohmelfs/dir.c | 25 +++++--- drivers/staging/pohmelfs/inode.c | 7 ++- drivers/staging/pohmelfs/net.c | 18 +++--- drivers/staging/pohmelfs/netfs.h | 5 ++ drivers/staging/pohmelfs/trans.c | 3 +- 7 files changed, 132 insertions(+), 28 deletions(-) diff --git a/drivers/staging/pohmelfs/config.c b/drivers/staging/pohmelfs/config.c index 99ae1d9649a0..90f962ee5fd8 100644 --- a/drivers/staging/pohmelfs/config.c +++ b/drivers/staging/pohmelfs/config.c @@ -284,9 +284,91 @@ static int pohmelfs_cn_disp(struct cn_msg *msg) i += 1; } + out_unlock: + mutex_unlock(&pohmelfs_config_lock); + return err; +} + +static int pohmelfs_cn_dump(struct cn_msg *msg) +{ + struct pohmelfs_config_group *g; + struct pohmelfs_config *c, *tmp; + int err = 0, i = 1; + int total_msg = 0; + + if (msg->len != sizeof(struct pohmelfs_ctl)) + return -EBADMSG; + + mutex_lock(&pohmelfs_config_lock); + + list_for_each_entry(g, &pohmelfs_config_list, group_entry) { + if (g) + total_msg += g->num_entry; + } + if (total_msg == 0) { + if (pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL)) + err = -ENOMEM; + goto out_unlock; + } + + list_for_each_entry(g, &pohmelfs_config_list, group_entry) { + if (g) { + list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) { + struct pohmelfs_ctl *sc = &c->state.ctl; + if (pohmelfs_send_reply(err, total_msg - i, POHMELFS_CTLINFO_ACK, msg, sc)) { + err = -ENOMEM; + goto out_unlock; + } + i += 1; + } + } + } + out_unlock: - mutex_unlock(&pohmelfs_config_lock); - return err; + mutex_unlock(&pohmelfs_config_lock); + return err; +} + +static int pohmelfs_cn_flush(struct cn_msg *msg) +{ + struct pohmelfs_config_group *g; + struct pohmelfs_ctl *ctl = (struct pohmelfs_ctl *)msg->data; + struct pohmelfs_config *c, *tmp; + int err = 0; + + if (msg->len != sizeof(struct pohmelfs_ctl)) + return -EBADMSG; + + mutex_lock(&pohmelfs_config_lock); + + if (ctl->idx != POHMELFS_NULL_IDX) { + g = pohmelfs_find_config_group(ctl->idx); + + if (!g) + goto out_unlock; + + list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) { + list_del(&c->config_entry); + g->num_entry--; + kfree(c); + } + } else { + list_for_each_entry(g, &pohmelfs_config_list, group_entry) { + if (g) { + list_for_each_entry_safe(c, tmp, &g->config_list, config_entry) { + list_del(&c->config_entry); + g->num_entry--; + kfree(c); + } + } + } + } + +out_unlock: + mutex_unlock(&pohmelfs_config_lock); + pohmelfs_cn_dump(msg); + + return err; } static int pohmelfs_modify_config(struct pohmelfs_ctl *old, struct pohmelfs_ctl *new) @@ -350,7 +432,7 @@ static int pohmelfs_cn_ctl(struct cn_msg *msg, int action) list_add_tail(&c->config_entry, &g->config_list); -out_unlock: + out_unlock: mutex_unlock(&pohmelfs_config_lock); if (pohmelfs_send_reply(err, 0, POHMELFS_NOINFO_ACK, msg, NULL)) err = -ENOMEM; @@ -408,7 +490,6 @@ static int pohmelfs_crypto_cipher_init(struct pohmelfs_config_group *g, struct p return 0; } - static int pohmelfs_cn_crypto(struct cn_msg *msg) { struct pohmelfs_crypto *crypto = (struct pohmelfs_crypto *)msg->data; @@ -456,9 +537,15 @@ static void pohmelfs_cn_callback(struct cn_msg *msg) case POHMELFS_FLAGS_MODIFY: err = pohmelfs_cn_ctl(msg, msg->flags); break; + case POHMELFS_FLAGS_FLUSH: + err = pohmelfs_cn_flush(msg); + break; case POHMELFS_FLAGS_SHOW: err = pohmelfs_cn_disp(msg); break; + case POHMELFS_FLAGS_DUMP: + err = pohmelfs_cn_dump(msg); + break; case POHMELFS_FLAGS_CRYPTO: err = pohmelfs_cn_crypto(msg); break; @@ -497,7 +584,8 @@ int pohmelfs_config_check(struct pohmelfs_config *config, int idx) int __init pohmelfs_config_init(void) { - return cn_add_callback(&pohmelfs_cn_id, "pohmelfs", pohmelfs_cn_callback); + /* XXX remove (void *) cast when vanilla connector got synced */ + return cn_add_callback(&pohmelfs_cn_id, "pohmelfs", (void *)pohmelfs_cn_callback); } void pohmelfs_config_exit(void) diff --git a/drivers/staging/pohmelfs/crypto.c b/drivers/staging/pohmelfs/crypto.c index 19781ad782fb..884183c0913a 100644 --- a/drivers/staging/pohmelfs/crypto.c +++ b/drivers/staging/pohmelfs/crypto.c @@ -176,7 +176,7 @@ static int pohmelfs_crypto_process(struct ablkcipher_request *req, timeout); if (!err) err = -ETIMEDOUT; - else + else if (err > 0) err = complete.error; break; default: @@ -738,7 +738,7 @@ static int pohmelfs_crypto_init_handshake(struct pohmelfs_sb *psb) psb->wait_on_page_timeout); if (!err) err = -ETIMEDOUT; - else + else if (err > 0) err = -psb->flags; if (!err) diff --git a/drivers/staging/pohmelfs/dir.c b/drivers/staging/pohmelfs/dir.c index 4c63a4cc1bd4..6c5b261e9f06 100644 --- a/drivers/staging/pohmelfs/dir.c +++ b/drivers/staging/pohmelfs/dir.c @@ -352,7 +352,9 @@ static int pohmelfs_sync_remote_dir(struct pohmelfs_inode *pi) test_bit(NETFS_INODE_REMOTE_DIR_SYNCED, &pi->state) || pi->error, ret); dprintk("%s: awake dir: %llu, ret: %ld, err: %d.\n", __func__, pi->ino, ret, pi->error); if (ret <= 0) { - err = -ETIMEDOUT; + err = ret; + if (!err) + err = -ETIMEDOUT; goto err_out_exit; } @@ -472,10 +474,11 @@ static int pohmelfs_lookup_single(struct pohmelfs_inode *parent, err = 0; ret = wait_event_interruptible_timeout(psb->wait, !test_bit(NETFS_COMMAND_PENDING, &parent->state), ret); - if (ret == 0) - err = -ETIMEDOUT; - else if (signal_pending(current)) - err = -EINTR; + if (ret <= 0) { + err = ret; + if (!err) + err = -ETIMEDOUT; + } if (err) goto err_out_exit; @@ -505,13 +508,21 @@ struct dentry *pohmelfs_lookup(struct inode *dir, struct dentry *dentry, struct struct pohmelfs_name *n; struct inode *inode = NULL; unsigned long ino = 0; - int err, lock_type = POHMELFS_READ_LOCK, need_lock; + int err, lock_type = POHMELFS_READ_LOCK, need_lock = 1; struct qstr str = dentry->d_name; if ((nd->intent.open.flags & O_ACCMODE) > 1) lock_type = POHMELFS_WRITE_LOCK; - need_lock = pohmelfs_need_lock(parent, lock_type); + if (test_bit(NETFS_INODE_OWNED, &parent->state)) { + if (lock_type == parent->lock_type) + need_lock = 0; + if ((lock_type == POHMELFS_READ_LOCK) && (parent->lock_type == POHMELFS_WRITE_LOCK)) + need_lock = 0; + } + + if ((lock_type == POHMELFS_READ_LOCK) && !test_bit(NETFS_INODE_REMOTE_DIR_SYNCED, &parent->state)) + need_lock = 1; str.hash = jhash(dentry->d_name.name, dentry->d_name.len, 0); diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c index 0b58f1043707..c94de3139223 100644 --- a/drivers/staging/pohmelfs/inode.c +++ b/drivers/staging/pohmelfs/inode.c @@ -1504,7 +1504,9 @@ static void pohmelfs_flush_inode(struct pohmelfs_inode *pi, unsigned int count) inode->i_sb->s_op->write_inode(inode, 0); } +#ifdef POHMELFS_TRUNCATE_ON_INODE_FLUSH truncate_inode_pages(inode->i_mapping, 0); +#endif pohmelfs_data_unlock(pi, 0, ~0, POHMELFS_WRITE_LOCK); mutex_unlock(&inode->i_mutex); @@ -1743,11 +1745,10 @@ static int pohmelfs_root_handshake(struct pohmelfs_sb *psb) err = wait_event_interruptible_timeout(psb->wait, (psb->flags != ~0), psb->wait_on_page_timeout); - if (!err) { + if (!err) err = -ETIMEDOUT; - } else { + else if (err > 0) err = -psb->flags; - } if (err) goto err_out_exit; diff --git a/drivers/staging/pohmelfs/net.c b/drivers/staging/pohmelfs/net.c index bdaab6905fde..af7f262e68c2 100644 --- a/drivers/staging/pohmelfs/net.c +++ b/drivers/staging/pohmelfs/net.c @@ -1005,13 +1005,12 @@ int netfs_state_init(struct netfs_state *st) if (st->socket->ops->family == AF_INET) { struct sockaddr_in *sin = (struct sockaddr_in *)&ctl->addr; - printk(KERN_INFO "%s: (re)connected to peer %u.%u.%u.%u:%d.\n", __func__, - NIPQUAD(sin->sin_addr.s_addr), ntohs(sin->sin_port)); + printk(KERN_INFO "%s: (re)connected to peer %pi4:%d.\n", __func__, + &sin->sin_addr.s_addr, ntohs(sin->sin_port)); } else if (st->socket->ops->family == AF_INET6) { struct sockaddr_in6 *sin = (struct sockaddr_in6 *)&ctl->addr; - printk(KERN_INFO "%s: (re)connected to peer " - "%pi6:%d", - __func__, &sin->sin6_addr, ntohs(sin->sin6_port)); + printk(KERN_INFO "%s: (re)connected to peer %pi6:%d", __func__, + &sin->sin6_addr, ntohs(sin->sin6_port)); } return 0; @@ -1031,13 +1030,12 @@ void netfs_state_exit(struct netfs_state *st) if (st->socket->ops->family == AF_INET) { struct sockaddr_in *sin = (struct sockaddr_in *)&st->ctl.addr; - printk("%s: disconnected from peer %u.%u.%u.%u:%d.\n", __func__, - NIPQUAD(sin->sin_addr.s_addr), ntohs(sin->sin_port)); + printk(KERN_INFO "%s: disconnected from peer %pi4:%d.\n", __func__, + &sin->sin_addr.s_addr, ntohs(sin->sin_port)); } else if (st->socket->ops->family == AF_INET6) { struct sockaddr_in6 *sin = (struct sockaddr_in6 *)&st->ctl.addr; - printk("%s: disconnected from peer " - "%pi6:%d", - __func__, &sin->sin6_addr, ntohs(sin->sin6_port)); + printk(KERN_INFO "%s: disconnected from peer %pi6:%d", __func__, + &sin->sin6_addr, ntohs(sin->sin6_port)); } sock_release(st->socket); diff --git a/drivers/staging/pohmelfs/netfs.h b/drivers/staging/pohmelfs/netfs.h index 3b60c611ba80..623a07d29dea 100644 --- a/drivers/staging/pohmelfs/netfs.h +++ b/drivers/staging/pohmelfs/netfs.h @@ -25,6 +25,7 @@ #define POHMELFS_CTLINFO_ACK 1 #define POHMELFS_NOINFO_ACK 2 +#define POHMELFS_NULL_IDX 65535 /* * Network command structure. @@ -87,6 +88,8 @@ enum { POHMELFS_FLAGS_SHOW, /* Network state control message for SHOW */ POHMELFS_FLAGS_CRYPTO, /* Crypto data control message */ POHMELFS_FLAGS_MODIFY, /* Network state modification message */ + POHMELFS_FLAGS_DUMP, /* Network state control message for SHOW ALL */ + POHMELFS_FLAGS_FLUSH, /* Network state control message for FLUSH */ }; /* @@ -905,6 +908,8 @@ static inline void pohmelfs_mcache_put(struct pohmelfs_sb *psb, pohmelfs_mcache_free(psb, m); } +//#define POHMELFS_TRUNCATE_ON_INODE_FLUSH + #endif /* __KERNEL__*/ #endif /* __NETFS_H */ diff --git a/drivers/staging/pohmelfs/trans.c b/drivers/staging/pohmelfs/trans.c index 4587f6d546aa..36a253582565 100644 --- a/drivers/staging/pohmelfs/trans.c +++ b/drivers/staging/pohmelfs/trans.c @@ -468,7 +468,8 @@ int netfs_trans_finish_send(struct netfs_trans *t, struct pohmelfs_sb *psb) continue; } - if (psb->active_state && (psb->active_state->state.ctl.prio >= st->ctl.prio)) + if (psb->active_state && (psb->active_state->state.ctl.prio >= st->ctl.prio) && + (t->flags & NETFS_TRANS_SINGLE_DST)) st = &psb->active_state->state; err = netfs_trans_push(t, st); -- 2.39.5