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ipc/mqueue.c
40.3 KB
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/* * POSIX message queues filesystem for Linux. * * Copyright (C) 2003,2004 Krzysztof Benedyczak (golbi@mat.uni.torun.pl) |
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* Michal Wronski (michal.wronski@gmail.com) |
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* * Spinlocks: Mohamed Abbas (abbas.mohamed@intel.com) * Lockless receive & send, fd based notify: |
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* Manfred Spraul (manfred@colorfullife.com) |
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* |
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* Audit: George Wilson (ltcgcw@us.ibm.com) * |
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* This file is released under the GPL. */ |
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#include <linux/capability.h> |
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#include <linux/init.h> #include <linux/pagemap.h> #include <linux/file.h> #include <linux/mount.h> |
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#include <linux/fs_context.h> |
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#include <linux/namei.h> #include <linux/sysctl.h> #include <linux/poll.h> #include <linux/mqueue.h> #include <linux/msg.h> #include <linux/skbuff.h> |
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#include <linux/vmalloc.h> |
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#include <linux/netlink.h> #include <linux/syscalls.h> |
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#include <linux/audit.h> |
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#include <linux/signal.h> |
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#include <linux/mutex.h> |
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#include <linux/nsproxy.h> #include <linux/pid.h> |
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#include <linux/ipc_namespace.h> |
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#include <linux/user_namespace.h> |
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#include <linux/slab.h> |
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#include <linux/sched/wake_q.h> |
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#include <linux/sched/signal.h> |
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#include <linux/sched/user.h> |
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|
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#include <net/sock.h> #include "util.h" |
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struct mqueue_fs_context { struct ipc_namespace *ipc_ns; }; |
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#define MQUEUE_MAGIC 0x19800202 #define DIRENT_SIZE 20 #define FILENT_SIZE 80 #define SEND 0 #define RECV 1 #define STATE_NONE 0 |
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#define STATE_READY 1 |
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|
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struct posix_msg_tree_node { struct rb_node rb_node; struct list_head msg_list; int priority; }; |
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struct ext_wait_queue { /* queue of sleeping tasks */ struct task_struct *task; struct list_head list; struct msg_msg *msg; /* ptr of loaded message */ int state; /* one of STATE_* values */ }; struct mqueue_inode_info { spinlock_t lock; struct inode vfs_inode; wait_queue_head_t wait_q; |
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struct rb_root msg_tree; |
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struct rb_node *msg_tree_rightmost; |
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struct posix_msg_tree_node *node_cache; |
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struct mq_attr attr; struct sigevent notify; |
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struct pid *notify_owner; |
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struct user_namespace *notify_user_ns; |
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struct user_struct *user; /* user who created, for accounting */ |
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struct sock *notify_sock; struct sk_buff *notify_cookie; /* for tasks waiting for free space and messages, respectively */ struct ext_wait_queue e_wait_q[2]; unsigned long qsize; /* size of queue in memory (sum of all msgs) */ }; |
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static struct file_system_type mqueue_fs_type; |
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static const struct inode_operations mqueue_dir_inode_operations; |
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static const struct file_operations mqueue_file_operations; |
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static const struct super_operations mqueue_super_ops; |
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static const struct fs_context_operations mqueue_fs_context_ops; |
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static void remove_notification(struct mqueue_inode_info *info); |
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static struct kmem_cache *mqueue_inode_cachep; |
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|
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static struct ctl_table_header *mq_sysctl_table; |
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static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode) { return container_of(inode, struct mqueue_inode_info, vfs_inode); } |
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/* * This routine should be called with the mq_lock held. */ static inline struct ipc_namespace *__get_ns_from_inode(struct inode *inode) |
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{ |
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return get_ipc_ns(inode->i_sb->s_fs_info); |
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} |
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static struct ipc_namespace *get_ns_from_inode(struct inode *inode) |
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{ |
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struct ipc_namespace *ns; spin_lock(&mq_lock); ns = __get_ns_from_inode(inode); spin_unlock(&mq_lock); return ns; |
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} |
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/* Auxiliary functions to manipulate messages' list */ static int msg_insert(struct msg_msg *msg, struct mqueue_inode_info *info) { struct rb_node **p, *parent = NULL; struct posix_msg_tree_node *leaf; |
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bool rightmost = true; |
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p = &info->msg_tree.rb_node; while (*p) { parent = *p; leaf = rb_entry(parent, struct posix_msg_tree_node, rb_node); if (likely(leaf->priority == msg->m_type)) goto insert_msg; |
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else if (msg->m_type < leaf->priority) { |
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p = &(*p)->rb_left; |
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rightmost = false; } else |
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p = &(*p)->rb_right; } |
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if (info->node_cache) { leaf = info->node_cache; info->node_cache = NULL; } else { leaf = kmalloc(sizeof(*leaf), GFP_ATOMIC); if (!leaf) return -ENOMEM; |
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INIT_LIST_HEAD(&leaf->msg_list); |
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} |
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leaf->priority = msg->m_type; |
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if (rightmost) info->msg_tree_rightmost = &leaf->rb_node; |
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rb_link_node(&leaf->rb_node, parent, p); rb_insert_color(&leaf->rb_node, &info->msg_tree); |
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insert_msg: info->attr.mq_curmsgs++; info->qsize += msg->m_ts; list_add_tail(&msg->m_list, &leaf->msg_list); return 0; } |
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static inline void msg_tree_erase(struct posix_msg_tree_node *leaf, struct mqueue_inode_info *info) { struct rb_node *node = &leaf->rb_node; if (info->msg_tree_rightmost == node) info->msg_tree_rightmost = rb_prev(node); rb_erase(node, &info->msg_tree); if (info->node_cache) { kfree(leaf); } else { info->node_cache = leaf; } } |
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static inline struct msg_msg *msg_get(struct mqueue_inode_info *info) { |
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struct rb_node *parent = NULL; |
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struct posix_msg_tree_node *leaf; struct msg_msg *msg; try_again: |
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/* * During insert, low priorities go to the left and high to the * right. On receive, we want the highest priorities first, so * walk all the way to the right. */ parent = info->msg_tree_rightmost; |
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if (!parent) { if (info->attr.mq_curmsgs) { pr_warn_once("Inconsistency in POSIX message queue, " "no tree element, but supposedly messages " "should exist! "); info->attr.mq_curmsgs = 0; } return NULL; } leaf = rb_entry(parent, struct posix_msg_tree_node, rb_node); |
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if (unlikely(list_empty(&leaf->msg_list))) { |
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pr_warn_once("Inconsistency in POSIX message queue, " "empty leaf node but we haven't implemented " "lazy leaf delete! "); |
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msg_tree_erase(leaf, info); |
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goto try_again; } else { msg = list_first_entry(&leaf->msg_list, struct msg_msg, m_list); list_del(&msg->m_list); if (list_empty(&leaf->msg_list)) { |
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msg_tree_erase(leaf, info); |
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} } info->attr.mq_curmsgs--; info->qsize -= msg->m_ts; return msg; } |
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static struct inode *mqueue_get_inode(struct super_block *sb, |
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struct ipc_namespace *ipc_ns, umode_t mode, |
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struct mq_attr *attr) |
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{ |
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struct user_struct *u = current_user(); |
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struct inode *inode; |
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int ret = -ENOMEM; |
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inode = new_inode(sb); |
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if (!inode) goto err; inode->i_ino = get_next_ino(); inode->i_mode = mode; inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); |
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inode->i_mtime = inode->i_ctime = inode->i_atime = current_time(inode); |
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if (S_ISREG(mode)) { struct mqueue_inode_info *info; |
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unsigned long mq_bytes, mq_treesize; |
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inode->i_fop = &mqueue_file_operations; inode->i_size = FILENT_SIZE; /* mqueue specific info */ info = MQUEUE_I(inode); spin_lock_init(&info->lock); init_waitqueue_head(&info->wait_q); INIT_LIST_HEAD(&info->e_wait_q[0].list); INIT_LIST_HEAD(&info->e_wait_q[1].list); info->notify_owner = NULL; |
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info->notify_user_ns = NULL; |
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info->qsize = 0; info->user = NULL; /* set when all is ok */ |
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info->msg_tree = RB_ROOT; |
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info->msg_tree_rightmost = NULL; |
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info->node_cache = NULL; |
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memset(&info->attr, 0, sizeof(info->attr)); |
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info->attr.mq_maxmsg = min(ipc_ns->mq_msg_max, ipc_ns->mq_msg_default); info->attr.mq_msgsize = min(ipc_ns->mq_msgsize_max, ipc_ns->mq_msgsize_default); |
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if (attr) { info->attr.mq_maxmsg = attr->mq_maxmsg; info->attr.mq_msgsize = attr->mq_msgsize; } |
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/* * We used to allocate a static array of pointers and account * the size of that array as well as one msg_msg struct per * possible message into the queue size. That's no longer * accurate as the queue is now an rbtree and will grow and * shrink depending on usage patterns. We can, however, still * account one msg_msg struct per message, but the nodes are * allocated depending on priority usage, and most programs * only use one, or a handful, of priorities. However, since * this is pinned memory, we need to assume worst case, so * that means the min(mq_maxmsg, max_priorities) * struct * posix_msg_tree_node. */ |
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ret = -EINVAL; if (info->attr.mq_maxmsg <= 0 || info->attr.mq_msgsize <= 0) goto out_inode; if (capable(CAP_SYS_RESOURCE)) { if (info->attr.mq_maxmsg > HARD_MSGMAX || info->attr.mq_msgsize > HARD_MSGSIZEMAX) goto out_inode; } else { if (info->attr.mq_maxmsg > ipc_ns->mq_msg_max || info->attr.mq_msgsize > ipc_ns->mq_msgsize_max) goto out_inode; } ret = -EOVERFLOW; /* check for overflow */ if (info->attr.mq_msgsize > ULONG_MAX/info->attr.mq_maxmsg) goto out_inode; |
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mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) + min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) * sizeof(struct posix_msg_tree_node); |
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mq_bytes = info->attr.mq_maxmsg * info->attr.mq_msgsize; if (mq_bytes + mq_treesize < mq_bytes) goto out_inode; mq_bytes += mq_treesize; |
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spin_lock(&mq_lock); if (u->mq_bytes + mq_bytes < u->mq_bytes || |
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u->mq_bytes + mq_bytes > rlimit(RLIMIT_MSGQUEUE)) { |
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spin_unlock(&mq_lock); /* mqueue_evict_inode() releases info->messages */ |
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ret = -EMFILE; |
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goto out_inode; |
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} |
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u->mq_bytes += mq_bytes; spin_unlock(&mq_lock); /* all is ok */ info->user = get_uid(u); } else if (S_ISDIR(mode)) { inc_nlink(inode); /* Some things misbehave if size == 0 on a directory */ inode->i_size = 2 * DIRENT_SIZE; inode->i_op = &mqueue_dir_inode_operations; inode->i_fop = &simple_dir_operations; |
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} |
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|
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return inode; out_inode: |
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iput(inode); |
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err: |
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return ERR_PTR(ret); |
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} |
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static int mqueue_fill_super(struct super_block *sb, struct fs_context *fc) |
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{ struct inode *inode; |
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struct ipc_namespace *ns = sb->s_fs_info; |
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|
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sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV; |
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sb->s_blocksize = PAGE_SIZE; sb->s_blocksize_bits = PAGE_SHIFT; |
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sb->s_magic = MQUEUE_MAGIC; sb->s_op = &mqueue_super_ops; |
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inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO, NULL); if (IS_ERR(inode)) return PTR_ERR(inode); |
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|
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sb->s_root = d_make_root(inode); if (!sb->s_root) return -ENOMEM; return 0; |
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} |
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static int mqueue_get_tree(struct fs_context *fc) |
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{ |
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struct mqueue_fs_context *ctx = fc->fs_private; |
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return get_tree_keyed(fc, mqueue_fill_super, ctx->ipc_ns); |
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} static void mqueue_fs_context_free(struct fs_context *fc) { struct mqueue_fs_context *ctx = fc->fs_private; |
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put_ipc_ns(ctx->ipc_ns); |
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kfree(ctx); } static int mqueue_init_fs_context(struct fs_context *fc) { struct mqueue_fs_context *ctx; ctx = kzalloc(sizeof(struct mqueue_fs_context), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->ipc_ns = get_ipc_ns(current->nsproxy->ipc_ns); |
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put_user_ns(fc->user_ns); fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns); |
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fc->fs_private = ctx; fc->ops = &mqueue_fs_context_ops; return 0; } static struct vfsmount *mq_create_mount(struct ipc_namespace *ns) { struct mqueue_fs_context *ctx; struct fs_context *fc; struct vfsmount *mnt; fc = fs_context_for_mount(&mqueue_fs_type, SB_KERNMOUNT); if (IS_ERR(fc)) return ERR_CAST(fc); ctx = fc->fs_private; put_ipc_ns(ctx->ipc_ns); ctx->ipc_ns = get_ipc_ns(ns); |
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put_user_ns(fc->user_ns); fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns); |
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mnt = fc_mount(fc); put_fs_context(fc); return mnt; |
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} |
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static void init_once(void *foo) |
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{ struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo; |
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inode_init_once(&p->vfs_inode); |
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} static struct inode *mqueue_alloc_inode(struct super_block *sb) { struct mqueue_inode_info *ei; |
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ei = kmem_cache_alloc(mqueue_inode_cachep, GFP_KERNEL); |
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if (!ei) return NULL; return &ei->vfs_inode; } |
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static void mqueue_free_inode(struct inode *inode) |
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{ kmem_cache_free(mqueue_inode_cachep, MQUEUE_I(inode)); } |
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static void mqueue_evict_inode(struct inode *inode) |
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{ struct mqueue_inode_info *info; struct user_struct *user; |
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struct ipc_namespace *ipc_ns; |
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struct msg_msg *msg, *nmsg; LIST_HEAD(tmp_msg); |
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|
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clear_inode(inode); |
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if (S_ISDIR(inode->i_mode)) |
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return; |
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|
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ipc_ns = get_ns_from_inode(inode); |
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info = MQUEUE_I(inode); spin_lock(&info->lock); |
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while ((msg = msg_get(info)) != NULL) |
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432 |
list_add_tail(&msg->m_list, &tmp_msg); |
ce2d52cc1 ipc/mqueue: add r... |
433 |
kfree(info->node_cache); |
1da177e4c Linux-2.6.12-rc2 |
434 |
spin_unlock(&info->lock); |
d6a2946a8 ipc: prevent lock... |
435 436 437 438 |
list_for_each_entry_safe(msg, nmsg, &tmp_msg, m_list) { list_del(&msg->m_list); free_msg(msg); } |
1da177e4c Linux-2.6.12-rc2 |
439 440 |
user = info->user; if (user) { |
a318f12ed ipc/mqueue.c: onl... |
441 442 443 444 445 446 447 448 449 |
unsigned long mq_bytes, mq_treesize; /* Total amount of bytes accounted for the mqueue */ mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) + min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) * sizeof(struct posix_msg_tree_node); mq_bytes = mq_treesize + (info->attr.mq_maxmsg * info->attr.mq_msgsize); |
1da177e4c Linux-2.6.12-rc2 |
450 451 |
spin_lock(&mq_lock); user->mq_bytes -= mq_bytes; |
7eafd7c74 namespaces: ipc n... |
452 453 454 455 456 457 458 459 |
/* * get_ns_from_inode() ensures that the * (ipc_ns = sb->s_fs_info) is either a valid ipc_ns * to which we now hold a reference, or it is NULL. * We can't put it here under mq_lock, though. */ if (ipc_ns) ipc_ns->mq_queues_count--; |
1da177e4c Linux-2.6.12-rc2 |
460 461 462 |
spin_unlock(&mq_lock); free_uid(user); } |
7eafd7c74 namespaces: ipc n... |
463 464 |
if (ipc_ns) put_ipc_ns(ipc_ns); |
1da177e4c Linux-2.6.12-rc2 |
465 |
} |
eecec19d9 mqueue: switch to... |
466 |
static int mqueue_create_attr(struct dentry *dentry, umode_t mode, void *arg) |
1da177e4c Linux-2.6.12-rc2 |
467 |
{ |
eecec19d9 mqueue: switch to... |
468 |
struct inode *dir = dentry->d_parent->d_inode; |
1da177e4c Linux-2.6.12-rc2 |
469 |
struct inode *inode; |
eecec19d9 mqueue: switch to... |
470 |
struct mq_attr *attr = arg; |
1da177e4c Linux-2.6.12-rc2 |
471 |
int error; |
7eafd7c74 namespaces: ipc n... |
472 |
struct ipc_namespace *ipc_ns; |
1da177e4c Linux-2.6.12-rc2 |
473 474 |
spin_lock(&mq_lock); |
7eafd7c74 namespaces: ipc n... |
475 476 477 478 479 |
ipc_ns = __get_ns_from_inode(dir); if (!ipc_ns) { error = -EACCES; goto out_unlock; } |
f3713fd9c ipc,mqueue: remov... |
480 481 482 |
if (ipc_ns->mq_queues_count >= ipc_ns->mq_queues_max && !capable(CAP_SYS_RESOURCE)) { |
1da177e4c Linux-2.6.12-rc2 |
483 |
error = -ENOSPC; |
614b84cf4 namespaces: mqueu... |
484 |
goto out_unlock; |
1da177e4c Linux-2.6.12-rc2 |
485 |
} |
614b84cf4 namespaces: mqueu... |
486 |
ipc_ns->mq_queues_count++; |
1da177e4c Linux-2.6.12-rc2 |
487 |
spin_unlock(&mq_lock); |
7eafd7c74 namespaces: ipc n... |
488 |
inode = mqueue_get_inode(dir->i_sb, ipc_ns, mode, attr); |
d40dcdb01 ipc/mqueue.c: fix... |
489 490 |
if (IS_ERR(inode)) { error = PTR_ERR(inode); |
1da177e4c Linux-2.6.12-rc2 |
491 |
spin_lock(&mq_lock); |
614b84cf4 namespaces: mqueu... |
492 493 |
ipc_ns->mq_queues_count--; goto out_unlock; |
1da177e4c Linux-2.6.12-rc2 |
494 |
} |
7eafd7c74 namespaces: ipc n... |
495 |
put_ipc_ns(ipc_ns); |
1da177e4c Linux-2.6.12-rc2 |
496 |
dir->i_size += DIRENT_SIZE; |
078cd8279 fs: Replace CURRE... |
497 |
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir); |
1da177e4c Linux-2.6.12-rc2 |
498 499 500 501 |
d_instantiate(dentry, inode); dget(dentry); return 0; |
614b84cf4 namespaces: mqueu... |
502 |
out_unlock: |
1da177e4c Linux-2.6.12-rc2 |
503 |
spin_unlock(&mq_lock); |
7eafd7c74 namespaces: ipc n... |
504 505 |
if (ipc_ns) put_ipc_ns(ipc_ns); |
1da177e4c Linux-2.6.12-rc2 |
506 507 |
return error; } |
eecec19d9 mqueue: switch to... |
508 509 510 511 512 |
static int mqueue_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { return mqueue_create_attr(dentry, mode, NULL); } |
1da177e4c Linux-2.6.12-rc2 |
513 514 |
static int mqueue_unlink(struct inode *dir, struct dentry *dentry) { |
75c3cfa85 VFS: assorted wei... |
515 |
struct inode *inode = d_inode(dentry); |
1da177e4c Linux-2.6.12-rc2 |
516 |
|
078cd8279 fs: Replace CURRE... |
517 |
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir); |
1da177e4c Linux-2.6.12-rc2 |
518 |
dir->i_size -= DIRENT_SIZE; |
239521f31 ipc: whitespace c... |
519 520 521 |
drop_nlink(inode); dput(dentry); return 0; |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 525 526 527 528 529 530 531 |
} /* * This is routine for system read from queue file. * To avoid mess with doing here some sort of mq_receive we allow * to read only queue size & notification info (the only values * that are interesting from user point of view and aren't accessible * through std routines) */ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data, |
f1a43f93f ipc: use simple_r... |
532 |
size_t count, loff_t *off) |
1da177e4c Linux-2.6.12-rc2 |
533 |
{ |
496ad9aa8 new helper: file_... |
534 |
struct mqueue_inode_info *info = MQUEUE_I(file_inode(filp)); |
1da177e4c Linux-2.6.12-rc2 |
535 |
char buffer[FILENT_SIZE]; |
f1a43f93f ipc: use simple_r... |
536 |
ssize_t ret; |
1da177e4c Linux-2.6.12-rc2 |
537 538 539 540 541 542 543 544 545 546 |
spin_lock(&info->lock); snprintf(buffer, sizeof(buffer), "QSIZE:%-10lu NOTIFY:%-5d SIGNO:%-5d NOTIFY_PID:%-6d ", info->qsize, info->notify_owner ? info->notify.sigev_notify : 0, (info->notify_owner && info->notify.sigev_notify == SIGEV_SIGNAL) ? info->notify.sigev_signo : 0, |
6c5f3e7b4 Pidns: make full ... |
547 |
pid_vnr(info->notify_owner)); |
1da177e4c Linux-2.6.12-rc2 |
548 549 |
spin_unlock(&info->lock); buffer[sizeof(buffer)-1] = '\0'; |
1da177e4c Linux-2.6.12-rc2 |
550 |
|
f1a43f93f ipc: use simple_r... |
551 552 553 554 |
ret = simple_read_from_buffer(u_data, count, off, buffer, strlen(buffer)); if (ret <= 0) return ret; |
1da177e4c Linux-2.6.12-rc2 |
555 |
|
078cd8279 fs: Replace CURRE... |
556 |
file_inode(filp)->i_atime = file_inode(filp)->i_ctime = current_time(file_inode(filp)); |
f1a43f93f ipc: use simple_r... |
557 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
558 |
} |
75e1fcc0b [PATCH] vfs: add ... |
559 |
static int mqueue_flush_file(struct file *filp, fl_owner_t id) |
1da177e4c Linux-2.6.12-rc2 |
560 |
{ |
496ad9aa8 new helper: file_... |
561 |
struct mqueue_inode_info *info = MQUEUE_I(file_inode(filp)); |
1da177e4c Linux-2.6.12-rc2 |
562 563 |
spin_lock(&info->lock); |
a03fcb730 [PATCH] update mq... |
564 |
if (task_tgid(current) == info->notify_owner) |
1da177e4c Linux-2.6.12-rc2 |
565 566 567 568 569 |
remove_notification(info); spin_unlock(&info->lock); return 0; } |
9dd957485 ipc, kernel, mm: ... |
570 |
static __poll_t mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab) |
1da177e4c Linux-2.6.12-rc2 |
571 |
{ |
496ad9aa8 new helper: file_... |
572 |
struct mqueue_inode_info *info = MQUEUE_I(file_inode(filp)); |
9dd957485 ipc, kernel, mm: ... |
573 |
__poll_t retval = 0; |
1da177e4c Linux-2.6.12-rc2 |
574 575 576 577 578 |
poll_wait(filp, &info->wait_q, poll_tab); spin_lock(&info->lock); if (info->attr.mq_curmsgs) |
a9a08845e vfs: do bulk POLL... |
579 |
retval = EPOLLIN | EPOLLRDNORM; |
1da177e4c Linux-2.6.12-rc2 |
580 581 |
if (info->attr.mq_curmsgs < info->attr.mq_maxmsg) |
a9a08845e vfs: do bulk POLL... |
582 |
retval |= EPOLLOUT | EPOLLWRNORM; |
1da177e4c Linux-2.6.12-rc2 |
583 584 585 586 587 588 589 590 591 592 |
spin_unlock(&info->lock); return retval; } /* Adds current to info->e_wait_q[sr] before element with smaller prio */ static void wq_add(struct mqueue_inode_info *info, int sr, struct ext_wait_queue *ewp) { struct ext_wait_queue *walk; |
1da177e4c Linux-2.6.12-rc2 |
593 |
list_for_each_entry(walk, &info->e_wait_q[sr].list, list) { |
68e34f4e8 ipc/mqueue.c: hav... |
594 |
if (walk->task->prio <= current->prio) { |
1da177e4c Linux-2.6.12-rc2 |
595 596 597 598 599 600 601 602 603 604 605 606 607 |
list_add_tail(&ewp->list, &walk->list); return; } } list_add_tail(&ewp->list, &info->e_wait_q[sr].list); } /* * Puts current task to sleep. Caller must hold queue lock. After return * lock isn't held. * sr: SEND or RECV */ static int wq_sleep(struct mqueue_inode_info *info, int sr, |
9ca7d8e68 mqueue: Convert m... |
608 |
ktime_t *timeout, struct ext_wait_queue *ewp) |
eac0b1c36 ipc/mqueue: add m... |
609 |
__releases(&info->lock) |
1da177e4c Linux-2.6.12-rc2 |
610 611 612 613 614 615 616 |
{ int retval; signed long time; wq_add(info, sr, ewp); for (;;) { |
fa6004ad4 ipc/mqueue: Imple... |
617 |
__set_current_state(TASK_INTERRUPTIBLE); |
1da177e4c Linux-2.6.12-rc2 |
618 619 |
spin_unlock(&info->lock); |
32ea845d5 ipc/mqueue.c: fix... |
620 621 |
time = schedule_hrtimeout_range_clock(timeout, 0, HRTIMER_MODE_ABS, CLOCK_REALTIME); |
1da177e4c Linux-2.6.12-rc2 |
622 |
|
1da177e4c Linux-2.6.12-rc2 |
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 |
if (ewp->state == STATE_READY) { retval = 0; goto out; } spin_lock(&info->lock); if (ewp->state == STATE_READY) { retval = 0; goto out_unlock; } if (signal_pending(current)) { retval = -ERESTARTSYS; break; } if (time == 0) { retval = -ETIMEDOUT; break; } } list_del(&ewp->list); out_unlock: spin_unlock(&info->lock); out: return retval; } /* * Returns waiting task that should be serviced first or NULL if none exists */ static struct ext_wait_queue *wq_get_first_waiter( struct mqueue_inode_info *info, int sr) { struct list_head *ptr; ptr = info->e_wait_q[sr].list.prev; if (ptr == &info->e_wait_q[sr].list) return NULL; return list_entry(ptr, struct ext_wait_queue, list); } |
1da177e4c Linux-2.6.12-rc2 |
661 662 663 |
static inline void set_cookie(struct sk_buff *skb, char code) { |
239521f31 ipc: whitespace c... |
664 |
((char *)skb->data)[NOTIFY_COOKIE_LEN-1] = code; |
1da177e4c Linux-2.6.12-rc2 |
665 666 667 668 669 670 671 672 673 674 675 676 677 678 |
} /* * The next function is only to split too long sys_mq_timedsend */ static void __do_notify(struct mqueue_inode_info *info) { /* notification * invoked when there is registered process and there isn't process * waiting synchronously for message AND state of queue changed from * empty to not empty. Here we are sure that no one is waiting * synchronously. */ if (info->notify_owner && info->attr.mq_curmsgs == 1) { |
ae7795bc6 signal: Distingui... |
679 |
struct kernel_siginfo sig_i; |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 684 |
switch (info->notify.sigev_notify) { case SIGEV_NONE: break; case SIGEV_SIGNAL: /* sends signal */ |
faf1f22b6 signal: Ensure ge... |
685 |
clear_siginfo(&sig_i); |
1da177e4c Linux-2.6.12-rc2 |
686 687 688 689 |
sig_i.si_signo = info->notify.sigev_signo; sig_i.si_errno = 0; sig_i.si_code = SI_MESGQ; sig_i.si_value = info->notify.sigev_value; |
6b550f949 user namespace: m... |
690 691 |
/* map current pid/uid into info->owner's namespaces */ rcu_read_lock(); |
a6684999f mqueue: fix si_pi... |
692 693 |
sig_i.si_pid = task_tgid_nr_ns(current, ns_of_pid(info->notify_owner)); |
76b6db010 userns: Replace u... |
694 |
sig_i.si_uid = from_kuid_munged(info->notify_user_ns, current_uid()); |
6b550f949 user namespace: m... |
695 |
rcu_read_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
696 |
|
a03fcb730 [PATCH] update mq... |
697 698 |
kill_pid_info(info->notify.sigev_signo, &sig_i, info->notify_owner); |
1da177e4c Linux-2.6.12-rc2 |
699 700 701 |
break; case SIGEV_THREAD: set_cookie(info->notify_cookie, NOTIFY_WOKENUP); |
7ee015e0f [NET]: cleanup 3r... |
702 |
netlink_sendskb(info->notify_sock, info->notify_cookie); |
1da177e4c Linux-2.6.12-rc2 |
703 704 705 |
break; } /* after notification unregisters process */ |
a03fcb730 [PATCH] update mq... |
706 |
put_pid(info->notify_owner); |
6f9ac6d93 mqueue: Explicitl... |
707 |
put_user_ns(info->notify_user_ns); |
a03fcb730 [PATCH] update mq... |
708 |
info->notify_owner = NULL; |
6f9ac6d93 mqueue: Explicitl... |
709 |
info->notify_user_ns = NULL; |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 |
} wake_up(&info->wait_q); } |
21fc538d8 y2038: ipc: Use _... |
713 |
static int prepare_timeout(const struct __kernel_timespec __user *u_abs_timeout, |
b90477263 ipc: mqueue: Repl... |
714 |
struct timespec64 *ts) |
1da177e4c Linux-2.6.12-rc2 |
715 |
{ |
b90477263 ipc: mqueue: Repl... |
716 |
if (get_timespec64(ts, u_abs_timeout)) |
9ca7d8e68 mqueue: Convert m... |
717 |
return -EFAULT; |
b90477263 ipc: mqueue: Repl... |
718 |
if (!timespec64_valid(ts)) |
9ca7d8e68 mqueue: Convert m... |
719 |
return -EINVAL; |
9ca7d8e68 mqueue: Convert m... |
720 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
721 722 723 724 |
} static void remove_notification(struct mqueue_inode_info *info) { |
a03fcb730 [PATCH] update mq... |
725 |
if (info->notify_owner != NULL && |
1da177e4c Linux-2.6.12-rc2 |
726 727 |
info->notify.sigev_notify == SIGEV_THREAD) { set_cookie(info->notify_cookie, NOTIFY_REMOVED); |
7ee015e0f [NET]: cleanup 3r... |
728 |
netlink_sendskb(info->notify_sock, info->notify_cookie); |
1da177e4c Linux-2.6.12-rc2 |
729 |
} |
a03fcb730 [PATCH] update mq... |
730 |
put_pid(info->notify_owner); |
6f9ac6d93 mqueue: Explicitl... |
731 |
put_user_ns(info->notify_user_ns); |
a03fcb730 [PATCH] update mq... |
732 |
info->notify_owner = NULL; |
6f9ac6d93 mqueue: Explicitl... |
733 |
info->notify_user_ns = NULL; |
1da177e4c Linux-2.6.12-rc2 |
734 |
} |
066cc813e do_mq_open(): mov... |
735 736 |
static int prepare_open(struct dentry *dentry, int oflag, int ro, umode_t mode, struct filename *name, |
614b84cf4 namespaces: mqueu... |
737 |
struct mq_attr *attr) |
1da177e4c Linux-2.6.12-rc2 |
738 |
{ |
745ca2475 CRED: Pass creden... |
739 740 |
static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE, MAY_READ | MAY_WRITE }; |
765927b2d switch dentry_ope... |
741 |
int acc; |
066cc813e do_mq_open(): mov... |
742 |
|
9b20d7fc5 mqueue: clean pre... |
743 744 |
if (d_really_is_negative(dentry)) { if (!(oflag & O_CREAT)) |
066cc813e do_mq_open(): mov... |
745 |
return -ENOENT; |
9b20d7fc5 mqueue: clean pre... |
746 747 748 749 750 |
if (ro) return ro; audit_inode_parent_hidden(name, dentry->d_parent); return vfs_mkobj(dentry, mode & ~current_umask(), mqueue_create_attr, attr); |
066cc813e do_mq_open(): mov... |
751 |
} |
9b20d7fc5 mqueue: clean pre... |
752 753 754 755 |
/* it already existed */ audit_inode(name, dentry, 0); if ((oflag & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL)) return -EEXIST; |
765927b2d switch dentry_ope... |
756 |
if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) |
af4a5372e move dentry_open(... |
757 |
return -EINVAL; |
765927b2d switch dentry_ope... |
758 |
acc = oflag2acc[oflag & O_ACCMODE]; |
066cc813e do_mq_open(): mov... |
759 |
return inode_permission(d_inode(dentry), acc); |
1da177e4c Linux-2.6.12-rc2 |
760 |
} |
0d0606060 mqueue: move comp... |
761 762 |
static int do_mq_open(const char __user *u_name, int oflag, umode_t mode, struct mq_attr *attr) |
1da177e4c Linux-2.6.12-rc2 |
763 |
{ |
cfb2f6f6e Revert "mqueue: s... |
764 765 |
struct vfsmount *mnt = current->nsproxy->ipc_ns->mq_mnt; struct dentry *root = mnt->mnt_root; |
91a27b2a7 vfs: define struc... |
766 |
struct filename *name; |
a713fd7f5 tidy do_mq_open()... |
767 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
768 |
int fd, error; |
312b90fbe mqueue: lift mnt_... |
769 |
int ro; |
1da177e4c Linux-2.6.12-rc2 |
770 |
|
0d0606060 mqueue: move comp... |
771 |
audit_mq_open(oflag, mode, attr); |
20ca73bc7 [PATCH] Audit of ... |
772 |
|
1da177e4c Linux-2.6.12-rc2 |
773 774 |
if (IS_ERR(name = getname(u_name))) return PTR_ERR(name); |
269f21344 tiny mq_open opti... |
775 |
fd = get_unused_fd_flags(O_CLOEXEC); |
1da177e4c Linux-2.6.12-rc2 |
776 777 |
if (fd < 0) goto out_putname; |
312b90fbe mqueue: lift mnt_... |
778 |
ro = mnt_want_write(mnt); /* we'll drop it in any case */ |
5955102c9 wrappers for ->i_... |
779 |
inode_lock(d_inode(root)); |
91a27b2a7 vfs: define struc... |
780 |
path.dentry = lookup_one_len(name->name, root, strlen(name->name)); |
765927b2d switch dentry_ope... |
781 782 |
if (IS_ERR(path.dentry)) { error = PTR_ERR(path.dentry); |
4294a8eed mqueue: fix mq_op... |
783 |
goto out_putfd; |
1da177e4c Linux-2.6.12-rc2 |
784 |
} |
312b90fbe mqueue: lift mnt_... |
785 |
path.mnt = mntget(mnt); |
066cc813e do_mq_open(): mov... |
786 787 788 789 790 791 792 |
error = prepare_open(path.dentry, oflag, ro, mode, name, attr); if (!error) { struct file *file = dentry_open(&path, oflag, current_cred()); if (!IS_ERR(file)) fd_install(fd, file); else error = PTR_ERR(file); |
7c7dce920 [PATCH] Fix doubl... |
793 |
} |
765927b2d switch dentry_ope... |
794 |
path_put(&path); |
7c7dce920 [PATCH] Fix doubl... |
795 |
out_putfd: |
765927b2d switch dentry_ope... |
796 797 798 799 |
if (error) { put_unused_fd(fd); fd = error; } |
5955102c9 wrappers for ->i_... |
800 |
inode_unlock(d_inode(root)); |
38d78e587 mqueue: sys_mq_op... |
801 802 |
if (!ro) mnt_drop_write(mnt); |
1da177e4c Linux-2.6.12-rc2 |
803 804 805 806 |
out_putname: putname(name); return fd; } |
0d0606060 mqueue: move comp... |
807 808 809 810 811 812 813 814 815 |
SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode, struct mq_attr __user *, u_attr) { struct mq_attr attr; if (u_attr && copy_from_user(&attr, u_attr, sizeof(struct mq_attr))) return -EFAULT; return do_mq_open(u_name, oflag, mode, u_attr ? &attr : NULL); } |
d5460c997 [CVE-2009-0029] S... |
816 |
SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name) |
1da177e4c Linux-2.6.12-rc2 |
817 818 |
{ int err; |
91a27b2a7 vfs: define struc... |
819 |
struct filename *name; |
1da177e4c Linux-2.6.12-rc2 |
820 821 |
struct dentry *dentry; struct inode *inode = NULL; |
7eafd7c74 namespaces: ipc n... |
822 |
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns; |
312b90fbe mqueue: lift mnt_... |
823 |
struct vfsmount *mnt = ipc_ns->mq_mnt; |
1da177e4c Linux-2.6.12-rc2 |
824 825 826 827 |
name = getname(u_name); if (IS_ERR(name)) return PTR_ERR(name); |
79f6530cb audit: fix mq_ope... |
828 |
audit_inode_parent_hidden(name, mnt->mnt_root); |
312b90fbe mqueue: lift mnt_... |
829 830 831 |
err = mnt_want_write(mnt); if (err) goto out_name; |
5955102c9 wrappers for ->i_... |
832 |
inode_lock_nested(d_inode(mnt->mnt_root), I_MUTEX_PARENT); |
91a27b2a7 vfs: define struc... |
833 834 |
dentry = lookup_one_len(name->name, mnt->mnt_root, strlen(name->name)); |
1da177e4c Linux-2.6.12-rc2 |
835 836 837 838 |
if (IS_ERR(dentry)) { err = PTR_ERR(dentry); goto out_unlock; } |
75c3cfa85 VFS: assorted wei... |
839 |
inode = d_inode(dentry); |
312b90fbe mqueue: lift mnt_... |
840 841 842 |
if (!inode) { err = -ENOENT; } else { |
7de9c6ee3 new helper: ihold() |
843 |
ihold(inode); |
75c3cfa85 VFS: assorted wei... |
844 |
err = vfs_unlink(d_inode(dentry->d_parent), dentry, NULL); |
312b90fbe mqueue: lift mnt_... |
845 |
} |
1da177e4c Linux-2.6.12-rc2 |
846 847 848 |
dput(dentry); out_unlock: |
5955102c9 wrappers for ->i_... |
849 |
inode_unlock(d_inode(mnt->mnt_root)); |
1da177e4c Linux-2.6.12-rc2 |
850 851 |
if (inode) iput(inode); |
312b90fbe mqueue: lift mnt_... |
852 853 854 |
mnt_drop_write(mnt); out_name: putname(name); |
1da177e4c Linux-2.6.12-rc2 |
855 856 857 858 859 860 861 862 863 864 |
return err; } /* Pipelined send and receive functions. * * If a receiver finds no waiting message, then it registers itself in the * list of waiting receivers. A sender checks that list before adding the new * message into the message array. If there is a waiting receiver, then it * bypasses the message array and directly hands the message over to the |
fa6004ad4 ipc/mqueue: Imple... |
865 866 867 868 869 870 871 872 873 |
* receiver. The receiver accepts the message and returns without grabbing the * queue spinlock: * * - Set pointer to message. * - Queue the receiver task for later wakeup (without the info->lock). * - Update its state to STATE_READY. Now the receiver can continue. * - Wake up the process after the lock is dropped. Should the process wake up * before this wakeup (due to a timeout or a signal) it will either see * STATE_READY and continue or acquire the lock to check the state again. |
1da177e4c Linux-2.6.12-rc2 |
874 875 876 877 878 879 880 |
* * The same algorithm is used for senders. */ /* pipelined_send() - send a message directly to the task waiting in * sys_mq_timedreceive() (without inserting message into a queue). */ |
fa6004ad4 ipc/mqueue: Imple... |
881 882 |
static inline void pipelined_send(struct wake_q_head *wake_q, struct mqueue_inode_info *info, |
1da177e4c Linux-2.6.12-rc2 |
883 884 885 886 887 |
struct msg_msg *message, struct ext_wait_queue *receiver) { receiver->msg = message; list_del(&receiver->list); |
fa6004ad4 ipc/mqueue: Imple... |
888 889 890 891 892 893 894 895 896 |
wake_q_add(wake_q, receiver->task); /* * Rely on the implicit cmpxchg barrier from wake_q_add such * that we can ensure that updating receiver->state is the last * write operation: As once set, the receiver can continue, * and if we don't have the reference count from the wake_q, * yet, at that point we can later have a use-after-free * condition and bogus wakeup. */ |
1da177e4c Linux-2.6.12-rc2 |
897 898 899 900 901 |
receiver->state = STATE_READY; } /* pipelined_receive() - if there is task waiting in sys_mq_timedsend() * gets its message and put to the queue (we have one free place for sure). */ |
fa6004ad4 ipc/mqueue: Imple... |
902 903 |
static inline void pipelined_receive(struct wake_q_head *wake_q, struct mqueue_inode_info *info) |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 907 908 909 910 911 |
{ struct ext_wait_queue *sender = wq_get_first_waiter(info, SEND); if (!sender) { /* for poll */ wake_up_interruptible(&info->wait_q); return; } |
d6629859b ipc/mqueue: impro... |
912 913 |
if (msg_insert(sender->msg, info)) return; |
fa6004ad4 ipc/mqueue: Imple... |
914 |
|
1da177e4c Linux-2.6.12-rc2 |
915 |
list_del(&sender->list); |
fa6004ad4 ipc/mqueue: Imple... |
916 |
wake_q_add(wake_q, sender->task); |
1da177e4c Linux-2.6.12-rc2 |
917 918 |
sender->state = STATE_READY; } |
0d0606060 mqueue: move comp... |
919 920 |
static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr, size_t msg_len, unsigned int msg_prio, |
b90477263 ipc: mqueue: Repl... |
921 |
struct timespec64 *ts) |
1da177e4c Linux-2.6.12-rc2 |
922 |
{ |
2903ff019 switch simple cas... |
923 |
struct fd f; |
1da177e4c Linux-2.6.12-rc2 |
924 925 926 927 928 |
struct inode *inode; struct ext_wait_queue wait; struct ext_wait_queue *receiver; struct msg_msg *msg_ptr; struct mqueue_inode_info *info; |
9ca7d8e68 mqueue: Convert m... |
929 |
ktime_t expires, *timeout = NULL; |
ce2d52cc1 ipc/mqueue: add r... |
930 |
struct posix_msg_tree_node *new_leaf = NULL; |
2903ff019 switch simple cas... |
931 |
int ret = 0; |
194a6b5b9 sched/wake_q: Ren... |
932 |
DEFINE_WAKE_Q(wake_q); |
1da177e4c Linux-2.6.12-rc2 |
933 934 935 |
if (unlikely(msg_prio >= (unsigned long) MQ_PRIO_MAX)) return -EINVAL; |
0d0606060 mqueue: move comp... |
936 |
if (ts) { |
b90477263 ipc: mqueue: Repl... |
937 |
expires = timespec64_to_ktime(*ts); |
0d0606060 mqueue: move comp... |
938 939 940 941 |
timeout = &expires; } audit_mq_sendrecv(mqdes, msg_len, msg_prio, ts); |
1da177e4c Linux-2.6.12-rc2 |
942 |
|
2903ff019 switch simple cas... |
943 944 |
f = fdget(mqdes); if (unlikely(!f.file)) { |
8d8ffefaa mqueue: only set ... |
945 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
946 |
goto out; |
8d8ffefaa mqueue: only set ... |
947 |
} |
1da177e4c Linux-2.6.12-rc2 |
948 |
|
496ad9aa8 new helper: file_... |
949 |
inode = file_inode(f.file); |
2903ff019 switch simple cas... |
950 |
if (unlikely(f.file->f_op != &mqueue_file_operations)) { |
8d8ffefaa mqueue: only set ... |
951 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
952 |
goto out_fput; |
8d8ffefaa mqueue: only set ... |
953 |
} |
1da177e4c Linux-2.6.12-rc2 |
954 |
info = MQUEUE_I(inode); |
9f45f5bf3 new helper: audit... |
955 |
audit_file(f.file); |
1da177e4c Linux-2.6.12-rc2 |
956 |
|
2903ff019 switch simple cas... |
957 |
if (unlikely(!(f.file->f_mode & FMODE_WRITE))) { |
8d8ffefaa mqueue: only set ... |
958 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
959 |
goto out_fput; |
8d8ffefaa mqueue: only set ... |
960 |
} |
1da177e4c Linux-2.6.12-rc2 |
961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 |
if (unlikely(msg_len > info->attr.mq_msgsize)) { ret = -EMSGSIZE; goto out_fput; } /* First try to allocate memory, before doing anything with * existing queues. */ msg_ptr = load_msg(u_msg_ptr, msg_len); if (IS_ERR(msg_ptr)) { ret = PTR_ERR(msg_ptr); goto out_fput; } msg_ptr->m_ts = msg_len; msg_ptr->m_type = msg_prio; |
ce2d52cc1 ipc/mqueue: add r... |
976 977 978 979 980 981 982 |
/* * msg_insert really wants us to have a valid, spare node struct so * it doesn't have to kmalloc a GFP_ATOMIC allocation, but it will * fall back to that if necessary. */ if (!info->node_cache) new_leaf = kmalloc(sizeof(*new_leaf), GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
983 |
spin_lock(&info->lock); |
ce2d52cc1 ipc/mqueue: add r... |
984 985 |
if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ |
ce2d52cc1 ipc/mqueue: add r... |
986 987 |
INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; |
ce2d52cc1 ipc/mqueue: add r... |
988 989 990 991 |
new_leaf = NULL; } else { kfree(new_leaf); } |
1da177e4c Linux-2.6.12-rc2 |
992 |
if (info->attr.mq_curmsgs == info->attr.mq_maxmsg) { |
2903ff019 switch simple cas... |
993 |
if (f.file->f_flags & O_NONBLOCK) { |
1da177e4c Linux-2.6.12-rc2 |
994 |
ret = -EAGAIN; |
1da177e4c Linux-2.6.12-rc2 |
995 996 997 998 999 |
} else { wait.task = current; wait.msg = (void *) msg_ptr; wait.state = STATE_NONE; ret = wq_sleep(info, SEND, timeout, &wait); |
ce2d52cc1 ipc/mqueue: add r... |
1000 1001 1002 1003 1004 |
/* * wq_sleep must be called with info->lock held, and * returns with the lock released */ goto out_free; |
1da177e4c Linux-2.6.12-rc2 |
1005 |
} |
1da177e4c Linux-2.6.12-rc2 |
1006 1007 1008 |
} else { receiver = wq_get_first_waiter(info, RECV); if (receiver) { |
fa6004ad4 ipc/mqueue: Imple... |
1009 |
pipelined_send(&wake_q, info, msg_ptr, receiver); |
1da177e4c Linux-2.6.12-rc2 |
1010 1011 |
} else { /* adds message to the queue */ |
ce2d52cc1 ipc/mqueue: add r... |
1012 1013 1014 |
ret = msg_insert(msg_ptr, info); if (ret) goto out_unlock; |
1da177e4c Linux-2.6.12-rc2 |
1015 1016 1017 |
__do_notify(info); } inode->i_atime = inode->i_mtime = inode->i_ctime = |
078cd8279 fs: Replace CURRE... |
1018 |
current_time(inode); |
1da177e4c Linux-2.6.12-rc2 |
1019 |
} |
ce2d52cc1 ipc/mqueue: add r... |
1020 1021 |
out_unlock: spin_unlock(&info->lock); |
fa6004ad4 ipc/mqueue: Imple... |
1022 |
wake_up_q(&wake_q); |
ce2d52cc1 ipc/mqueue: add r... |
1023 1024 1025 |
out_free: if (ret) free_msg(msg_ptr); |
1da177e4c Linux-2.6.12-rc2 |
1026 |
out_fput: |
2903ff019 switch simple cas... |
1027 |
fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
1028 1029 1030 |
out: return ret; } |
0d0606060 mqueue: move comp... |
1031 1032 |
static int do_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr, size_t msg_len, unsigned int __user *u_msg_prio, |
b90477263 ipc: mqueue: Repl... |
1033 |
struct timespec64 *ts) |
1da177e4c Linux-2.6.12-rc2 |
1034 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1035 1036 |
ssize_t ret; struct msg_msg *msg_ptr; |
2903ff019 switch simple cas... |
1037 |
struct fd f; |
1da177e4c Linux-2.6.12-rc2 |
1038 1039 1040 |
struct inode *inode; struct mqueue_inode_info *info; struct ext_wait_queue wait; |
9ca7d8e68 mqueue: Convert m... |
1041 |
ktime_t expires, *timeout = NULL; |
ce2d52cc1 ipc/mqueue: add r... |
1042 |
struct posix_msg_tree_node *new_leaf = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1043 |
|
0d0606060 mqueue: move comp... |
1044 |
if (ts) { |
b90477263 ipc: mqueue: Repl... |
1045 |
expires = timespec64_to_ktime(*ts); |
9ca7d8e68 mqueue: Convert m... |
1046 |
timeout = &expires; |
c32c8af43 sanitize AUDIT_MQ... |
1047 |
} |
20ca73bc7 [PATCH] Audit of ... |
1048 |
|
0d0606060 mqueue: move comp... |
1049 |
audit_mq_sendrecv(mqdes, msg_len, 0, ts); |
1da177e4c Linux-2.6.12-rc2 |
1050 |
|
2903ff019 switch simple cas... |
1051 1052 |
f = fdget(mqdes); if (unlikely(!f.file)) { |
8d8ffefaa mqueue: only set ... |
1053 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1054 |
goto out; |
8d8ffefaa mqueue: only set ... |
1055 |
} |
1da177e4c Linux-2.6.12-rc2 |
1056 |
|
496ad9aa8 new helper: file_... |
1057 |
inode = file_inode(f.file); |
2903ff019 switch simple cas... |
1058 |
if (unlikely(f.file->f_op != &mqueue_file_operations)) { |
8d8ffefaa mqueue: only set ... |
1059 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1060 |
goto out_fput; |
8d8ffefaa mqueue: only set ... |
1061 |
} |
1da177e4c Linux-2.6.12-rc2 |
1062 |
info = MQUEUE_I(inode); |
9f45f5bf3 new helper: audit... |
1063 |
audit_file(f.file); |
1da177e4c Linux-2.6.12-rc2 |
1064 |
|
2903ff019 switch simple cas... |
1065 |
if (unlikely(!(f.file->f_mode & FMODE_READ))) { |
8d8ffefaa mqueue: only set ... |
1066 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1067 |
goto out_fput; |
8d8ffefaa mqueue: only set ... |
1068 |
} |
1da177e4c Linux-2.6.12-rc2 |
1069 1070 1071 1072 1073 1074 |
/* checks if buffer is big enough */ if (unlikely(msg_len < info->attr.mq_msgsize)) { ret = -EMSGSIZE; goto out_fput; } |
ce2d52cc1 ipc/mqueue: add r... |
1075 1076 1077 1078 1079 1080 1081 |
/* * msg_insert really wants us to have a valid, spare node struct so * it doesn't have to kmalloc a GFP_ATOMIC allocation, but it will * fall back to that if necessary. */ if (!info->node_cache) new_leaf = kmalloc(sizeof(*new_leaf), GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
1082 |
spin_lock(&info->lock); |
ce2d52cc1 ipc/mqueue: add r... |
1083 1084 1085 |
if (!info->node_cache && new_leaf) { /* Save our speculative allocation into the cache */ |
ce2d52cc1 ipc/mqueue: add r... |
1086 1087 |
INIT_LIST_HEAD(&new_leaf->msg_list); info->node_cache = new_leaf; |
ce2d52cc1 ipc/mqueue: add r... |
1088 1089 1090 |
} else { kfree(new_leaf); } |
1da177e4c Linux-2.6.12-rc2 |
1091 |
if (info->attr.mq_curmsgs == 0) { |
2903ff019 switch simple cas... |
1092 |
if (f.file->f_flags & O_NONBLOCK) { |
1da177e4c Linux-2.6.12-rc2 |
1093 1094 |
spin_unlock(&info->lock); ret = -EAGAIN; |
1da177e4c Linux-2.6.12-rc2 |
1095 1096 1097 1098 1099 1100 1101 |
} else { wait.task = current; wait.state = STATE_NONE; ret = wq_sleep(info, RECV, timeout, &wait); msg_ptr = wait.msg; } } else { |
194a6b5b9 sched/wake_q: Ren... |
1102 |
DEFINE_WAKE_Q(wake_q); |
fa6004ad4 ipc/mqueue: Imple... |
1103 |
|
1da177e4c Linux-2.6.12-rc2 |
1104 1105 1106 |
msg_ptr = msg_get(info); inode->i_atime = inode->i_mtime = inode->i_ctime = |
078cd8279 fs: Replace CURRE... |
1107 |
current_time(inode); |
1da177e4c Linux-2.6.12-rc2 |
1108 1109 |
/* There is now free space in queue. */ |
fa6004ad4 ipc/mqueue: Imple... |
1110 |
pipelined_receive(&wake_q, info); |
1da177e4c Linux-2.6.12-rc2 |
1111 |
spin_unlock(&info->lock); |
fa6004ad4 ipc/mqueue: Imple... |
1112 |
wake_up_q(&wake_q); |
1da177e4c Linux-2.6.12-rc2 |
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 |
ret = 0; } if (ret == 0) { ret = msg_ptr->m_ts; if ((u_msg_prio && put_user(msg_ptr->m_type, u_msg_prio)) || store_msg(u_msg_ptr, msg_ptr, msg_ptr->m_ts)) { ret = -EFAULT; } free_msg(msg_ptr); } out_fput: |
2903ff019 switch simple cas... |
1125 |
fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
1126 1127 1128 |
out: return ret; } |
0d0606060 mqueue: move comp... |
1129 1130 |
SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr, size_t, msg_len, unsigned int, msg_prio, |
21fc538d8 y2038: ipc: Use _... |
1131 |
const struct __kernel_timespec __user *, u_abs_timeout) |
0d0606060 mqueue: move comp... |
1132 |
{ |
b90477263 ipc: mqueue: Repl... |
1133 |
struct timespec64 ts, *p = NULL; |
0d0606060 mqueue: move comp... |
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 |
if (u_abs_timeout) { int res = prepare_timeout(u_abs_timeout, &ts); if (res) return res; p = &ts; } return do_mq_timedsend(mqdes, u_msg_ptr, msg_len, msg_prio, p); } SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr, size_t, msg_len, unsigned int __user *, u_msg_prio, |
21fc538d8 y2038: ipc: Use _... |
1145 |
const struct __kernel_timespec __user *, u_abs_timeout) |
0d0606060 mqueue: move comp... |
1146 |
{ |
b90477263 ipc: mqueue: Repl... |
1147 |
struct timespec64 ts, *p = NULL; |
0d0606060 mqueue: move comp... |
1148 1149 1150 1151 1152 1153 1154 1155 |
if (u_abs_timeout) { int res = prepare_timeout(u_abs_timeout, &ts); if (res) return res; p = &ts; } return do_mq_timedreceive(mqdes, u_msg_ptr, msg_len, u_msg_prio, p); } |
1da177e4c Linux-2.6.12-rc2 |
1156 1157 1158 1159 1160 |
/* * Notes: the case when user wants us to deregister (with NULL as pointer) * and he isn't currently owner of notification, will be silently discarded. * It isn't explicitly defined in the POSIX. */ |
0d0606060 mqueue: move comp... |
1161 |
static int do_mq_notify(mqd_t mqdes, const struct sigevent *notification) |
1da177e4c Linux-2.6.12-rc2 |
1162 |
{ |
2903ff019 switch simple cas... |
1163 1164 |
int ret; struct fd f; |
1da177e4c Linux-2.6.12-rc2 |
1165 1166 |
struct sock *sock; struct inode *inode; |
1da177e4c Linux-2.6.12-rc2 |
1167 1168 |
struct mqueue_inode_info *info; struct sk_buff *nc; |
0d0606060 mqueue: move comp... |
1169 |
audit_mq_notify(mqdes, notification); |
1da177e4c Linux-2.6.12-rc2 |
1170 |
|
20114f71b sanitize audit_mq... |
1171 1172 |
nc = NULL; sock = NULL; |
0d0606060 mqueue: move comp... |
1173 1174 1175 1176 |
if (notification != NULL) { if (unlikely(notification->sigev_notify != SIGEV_NONE && notification->sigev_notify != SIGEV_SIGNAL && notification->sigev_notify != SIGEV_THREAD)) |
1da177e4c Linux-2.6.12-rc2 |
1177 |
return -EINVAL; |
0d0606060 mqueue: move comp... |
1178 1179 |
if (notification->sigev_notify == SIGEV_SIGNAL && !valid_signal(notification->sigev_signo)) { |
1da177e4c Linux-2.6.12-rc2 |
1180 1181 |
return -EINVAL; } |
0d0606060 mqueue: move comp... |
1182 |
if (notification->sigev_notify == SIGEV_THREAD) { |
c3d8d1e30 [NETLINK]: Fix un... |
1183 |
long timeo; |
1da177e4c Linux-2.6.12-rc2 |
1184 1185 |
/* create the notify skb */ nc = alloc_skb(NOTIFY_COOKIE_LEN, GFP_KERNEL); |
c231740dd ipc/mqueue: impro... |
1186 1187 |
if (!nc) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1188 |
if (copy_from_user(nc->data, |
0d0606060 mqueue: move comp... |
1189 |
notification->sigev_value.sival_ptr, |
1da177e4c Linux-2.6.12-rc2 |
1190 |
NOTIFY_COOKIE_LEN)) { |
8d8ffefaa mqueue: only set ... |
1191 |
ret = -EFAULT; |
c231740dd ipc/mqueue: impro... |
1192 |
goto free_skb; |
1da177e4c Linux-2.6.12-rc2 |
1193 1194 1195 1196 1197 1198 |
} /* TODO: add a header? */ skb_put(nc, NOTIFY_COOKIE_LEN); /* and attach it to the socket */ retry: |
0d0606060 mqueue: move comp... |
1199 |
f = fdget(notification->sigev_signo); |
2903ff019 switch simple cas... |
1200 |
if (!f.file) { |
8d8ffefaa mqueue: only set ... |
1201 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1202 |
goto out; |
8d8ffefaa mqueue: only set ... |
1203 |
} |
2903ff019 switch simple cas... |
1204 1205 |
sock = netlink_getsockbyfilp(f.file); fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
1206 1207 |
if (IS_ERR(sock)) { ret = PTR_ERR(sock); |
c231740dd ipc/mqueue: impro... |
1208 |
goto free_skb; |
1da177e4c Linux-2.6.12-rc2 |
1209 |
} |
c3d8d1e30 [NETLINK]: Fix un... |
1210 |
timeo = MAX_SCHEDULE_TIMEOUT; |
9457afee8 netlink: Remove n... |
1211 |
ret = netlink_attachskb(sock, nc, &timeo, NULL); |
f991af3da mqueue: fix a use... |
1212 1213 |
if (ret == 1) { sock = NULL; |
8d8ffefaa mqueue: only set ... |
1214 |
goto retry; |
f991af3da mqueue: fix a use... |
1215 |
} |
c231740dd ipc/mqueue: impro... |
1216 1217 |
if (ret) return ret; |
1da177e4c Linux-2.6.12-rc2 |
1218 1219 |
} } |
2903ff019 switch simple cas... |
1220 1221 |
f = fdget(mqdes); if (!f.file) { |
8d8ffefaa mqueue: only set ... |
1222 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1223 |
goto out; |
8d8ffefaa mqueue: only set ... |
1224 |
} |
1da177e4c Linux-2.6.12-rc2 |
1225 |
|
496ad9aa8 new helper: file_... |
1226 |
inode = file_inode(f.file); |
2903ff019 switch simple cas... |
1227 |
if (unlikely(f.file->f_op != &mqueue_file_operations)) { |
8d8ffefaa mqueue: only set ... |
1228 |
ret = -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1229 |
goto out_fput; |
8d8ffefaa mqueue: only set ... |
1230 |
} |
1da177e4c Linux-2.6.12-rc2 |
1231 1232 1233 1234 |
info = MQUEUE_I(inode); ret = 0; spin_lock(&info->lock); |
0d0606060 mqueue: move comp... |
1235 |
if (notification == NULL) { |
a03fcb730 [PATCH] update mq... |
1236 |
if (info->notify_owner == task_tgid(current)) { |
1da177e4c Linux-2.6.12-rc2 |
1237 |
remove_notification(info); |
078cd8279 fs: Replace CURRE... |
1238 |
inode->i_atime = inode->i_ctime = current_time(inode); |
1da177e4c Linux-2.6.12-rc2 |
1239 |
} |
a03fcb730 [PATCH] update mq... |
1240 |
} else if (info->notify_owner != NULL) { |
1da177e4c Linux-2.6.12-rc2 |
1241 1242 |
ret = -EBUSY; } else { |
0d0606060 mqueue: move comp... |
1243 |
switch (notification->sigev_notify) { |
1da177e4c Linux-2.6.12-rc2 |
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 |
case SIGEV_NONE: info->notify.sigev_notify = SIGEV_NONE; break; case SIGEV_THREAD: info->notify_sock = sock; info->notify_cookie = nc; sock = NULL; nc = NULL; info->notify.sigev_notify = SIGEV_THREAD; break; case SIGEV_SIGNAL: |
0d0606060 mqueue: move comp... |
1255 1256 |
info->notify.sigev_signo = notification->sigev_signo; info->notify.sigev_value = notification->sigev_value; |
1da177e4c Linux-2.6.12-rc2 |
1257 1258 1259 |
info->notify.sigev_notify = SIGEV_SIGNAL; break; } |
a03fcb730 [PATCH] update mq... |
1260 1261 |
info->notify_owner = get_pid(task_tgid(current)); |
6f9ac6d93 mqueue: Explicitl... |
1262 |
info->notify_user_ns = get_user_ns(current_user_ns()); |
078cd8279 fs: Replace CURRE... |
1263 |
inode->i_atime = inode->i_ctime = current_time(inode); |
1da177e4c Linux-2.6.12-rc2 |
1264 1265 1266 |
} spin_unlock(&info->lock); out_fput: |
2903ff019 switch simple cas... |
1267 |
fdput(f); |
1da177e4c Linux-2.6.12-rc2 |
1268 |
out: |
3ab08fe20 ipc: remove brace... |
1269 |
if (sock) |
1da177e4c Linux-2.6.12-rc2 |
1270 |
netlink_detachskb(sock, nc); |
97b0b1ad5 ipc/mqueue.c: del... |
1271 |
else |
c231740dd ipc/mqueue: impro... |
1272 |
free_skb: |
1da177e4c Linux-2.6.12-rc2 |
1273 |
dev_kfree_skb(nc); |
3ab08fe20 ipc: remove brace... |
1274 |
|
1da177e4c Linux-2.6.12-rc2 |
1275 1276 |
return ret; } |
0d0606060 mqueue: move comp... |
1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 |
SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes, const struct sigevent __user *, u_notification) { struct sigevent n, *p = NULL; if (u_notification) { if (copy_from_user(&n, u_notification, sizeof(struct sigevent))) return -EFAULT; p = &n; } return do_mq_notify(mqdes, p); } static int do_mq_getsetattr(int mqdes, struct mq_attr *new, struct mq_attr *old) |
1da177e4c Linux-2.6.12-rc2 |
1290 |
{ |
2903ff019 switch simple cas... |
1291 |
struct fd f; |
1da177e4c Linux-2.6.12-rc2 |
1292 1293 |
struct inode *inode; struct mqueue_inode_info *info; |
0d0606060 mqueue: move comp... |
1294 1295 |
if (new && (new->mq_flags & (~O_NONBLOCK))) return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
1296 |
|
2903ff019 switch simple cas... |
1297 |
f = fdget(mqdes); |
0d0606060 mqueue: move comp... |
1298 1299 |
if (!f.file) return -EBADF; |
1da177e4c Linux-2.6.12-rc2 |
1300 |
|
2903ff019 switch simple cas... |
1301 |
if (unlikely(f.file->f_op != &mqueue_file_operations)) { |
0d0606060 mqueue: move comp... |
1302 1303 |
fdput(f); return -EBADF; |
8d8ffefaa mqueue: only set ... |
1304 |
} |
0d0606060 mqueue: move comp... |
1305 1306 |
inode = file_inode(f.file); |
1da177e4c Linux-2.6.12-rc2 |
1307 1308 1309 |
info = MQUEUE_I(inode); spin_lock(&info->lock); |
0d0606060 mqueue: move comp... |
1310 1311 1312 1313 1314 1315 |
if (old) { *old = info->attr; old->mq_flags = f.file->f_flags & O_NONBLOCK; } if (new) { audit_mq_getsetattr(mqdes, new); |
2903ff019 switch simple cas... |
1316 |
spin_lock(&f.file->f_lock); |
0d0606060 mqueue: move comp... |
1317 |
if (new->mq_flags & O_NONBLOCK) |
2903ff019 switch simple cas... |
1318 |
f.file->f_flags |= O_NONBLOCK; |
1da177e4c Linux-2.6.12-rc2 |
1319 |
else |
2903ff019 switch simple cas... |
1320 1321 |
f.file->f_flags &= ~O_NONBLOCK; spin_unlock(&f.file->f_lock); |
1da177e4c Linux-2.6.12-rc2 |
1322 |
|
078cd8279 fs: Replace CURRE... |
1323 |
inode->i_atime = inode->i_ctime = current_time(inode); |
1da177e4c Linux-2.6.12-rc2 |
1324 1325 1326 |
} spin_unlock(&info->lock); |
0d0606060 mqueue: move comp... |
1327 1328 1329 |
fdput(f); return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1330 |
|
0d0606060 mqueue: move comp... |
1331 1332 1333 1334 1335 1336 1337 |
SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes, const struct mq_attr __user *, u_mqstat, struct mq_attr __user *, u_omqstat) { int ret; struct mq_attr mqstat, omqstat; struct mq_attr *new = NULL, *old = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1338 |
|
0d0606060 mqueue: move comp... |
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 |
if (u_mqstat) { new = &mqstat; if (copy_from_user(new, u_mqstat, sizeof(struct mq_attr))) return -EFAULT; } if (u_omqstat) old = &omqstat; ret = do_mq_getsetattr(mqdes, new, old); if (ret || !old) return ret; if (copy_to_user(u_omqstat, old, sizeof(struct mq_attr))) return -EFAULT; return 0; } #ifdef CONFIG_COMPAT struct compat_mq_attr { compat_long_t mq_flags; /* message queue flags */ compat_long_t mq_maxmsg; /* maximum number of messages */ compat_long_t mq_msgsize; /* maximum message size */ compat_long_t mq_curmsgs; /* number of messages currently queued */ compat_long_t __reserved[4]; /* ignored for input, zeroed for output */ }; static inline int get_compat_mq_attr(struct mq_attr *attr, const struct compat_mq_attr __user *uattr) { struct compat_mq_attr v; if (copy_from_user(&v, uattr, sizeof(*uattr))) return -EFAULT; memset(attr, 0, sizeof(*attr)); attr->mq_flags = v.mq_flags; attr->mq_maxmsg = v.mq_maxmsg; attr->mq_msgsize = v.mq_msgsize; attr->mq_curmsgs = v.mq_curmsgs; return 0; } static inline int put_compat_mq_attr(const struct mq_attr *attr, struct compat_mq_attr __user *uattr) { struct compat_mq_attr v; memset(&v, 0, sizeof(v)); v.mq_flags = attr->mq_flags; v.mq_maxmsg = attr->mq_maxmsg; v.mq_msgsize = attr->mq_msgsize; v.mq_curmsgs = attr->mq_curmsgs; if (copy_to_user(uattr, &v, sizeof(*uattr))) return -EFAULT; return 0; } COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, compat_mode_t, mode, struct compat_mq_attr __user *, u_attr) { struct mq_attr attr, *p = NULL; if (u_attr && oflag & O_CREAT) { p = &attr; if (get_compat_mq_attr(&attr, u_attr)) return -EFAULT; } return do_mq_open(u_name, oflag, mode, p); } |
b0d175781 y2038: ipc: Enabl... |
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 |
COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes, const struct compat_sigevent __user *, u_notification) { struct sigevent n, *p = NULL; if (u_notification) { if (get_compat_sigevent(&n, u_notification)) return -EFAULT; if (n.sigev_notify == SIGEV_THREAD) n.sigev_value.sival_ptr = compat_ptr(n.sigev_value.sival_int); p = &n; } return do_mq_notify(mqdes, p); } COMPAT_SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes, const struct compat_mq_attr __user *, u_mqstat, struct compat_mq_attr __user *, u_omqstat) { int ret; struct mq_attr mqstat, omqstat; struct mq_attr *new = NULL, *old = NULL; if (u_mqstat) { new = &mqstat; if (get_compat_mq_attr(new, u_mqstat)) return -EFAULT; } if (u_omqstat) old = &omqstat; ret = do_mq_getsetattr(mqdes, new, old); if (ret || !old) return ret; if (put_compat_mq_attr(old, u_omqstat)) return -EFAULT; return 0; } #endif #ifdef CONFIG_COMPAT_32BIT_TIME |
9afc5eee6 y2038: globally r... |
1450 |
static int compat_prepare_timeout(const struct old_timespec32 __user *p, |
b90477263 ipc: mqueue: Repl... |
1451 |
struct timespec64 *ts) |
0d0606060 mqueue: move comp... |
1452 |
{ |
9afc5eee6 y2038: globally r... |
1453 |
if (get_old_timespec32(ts, p)) |
0d0606060 mqueue: move comp... |
1454 |
return -EFAULT; |
b90477263 ipc: mqueue: Repl... |
1455 |
if (!timespec64_valid(ts)) |
0d0606060 mqueue: move comp... |
1456 1457 1458 |
return -EINVAL; return 0; } |
8dabe7245 y2038: syscalls: ... |
1459 1460 1461 1462 |
SYSCALL_DEFINE5(mq_timedsend_time32, mqd_t, mqdes, const char __user *, u_msg_ptr, unsigned int, msg_len, unsigned int, msg_prio, const struct old_timespec32 __user *, u_abs_timeout) |
0d0606060 mqueue: move comp... |
1463 |
{ |
b90477263 ipc: mqueue: Repl... |
1464 |
struct timespec64 ts, *p = NULL; |
0d0606060 mqueue: move comp... |
1465 1466 1467 1468 1469 1470 1471 1472 |
if (u_abs_timeout) { int res = compat_prepare_timeout(u_abs_timeout, &ts); if (res) return res; p = &ts; } return do_mq_timedsend(mqdes, u_msg_ptr, msg_len, msg_prio, p); } |
8dabe7245 y2038: syscalls: ... |
1473 1474 1475 1476 |
SYSCALL_DEFINE5(mq_timedreceive_time32, mqd_t, mqdes, char __user *, u_msg_ptr, unsigned int, msg_len, unsigned int __user *, u_msg_prio, const struct old_timespec32 __user *, u_abs_timeout) |
0d0606060 mqueue: move comp... |
1477 |
{ |
b90477263 ipc: mqueue: Repl... |
1478 |
struct timespec64 ts, *p = NULL; |
0d0606060 mqueue: move comp... |
1479 1480 1481 1482 1483 1484 1485 1486 |
if (u_abs_timeout) { int res = compat_prepare_timeout(u_abs_timeout, &ts); if (res) return res; p = &ts; } return do_mq_timedreceive(mqdes, u_msg_ptr, msg_len, u_msg_prio, p); } |
0d0606060 mqueue: move comp... |
1487 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
1488 |
|
92e1d5be9 [PATCH] mark stru... |
1489 |
static const struct inode_operations mqueue_dir_inode_operations = { |
1da177e4c Linux-2.6.12-rc2 |
1490 1491 1492 1493 |
.lookup = simple_lookup, .create = mqueue_create, .unlink = mqueue_unlink, }; |
9a32144e9 [PATCH] mark stru... |
1494 |
static const struct file_operations mqueue_file_operations = { |
1da177e4c Linux-2.6.12-rc2 |
1495 1496 1497 |
.flush = mqueue_flush_file, .poll = mqueue_poll_file, .read = mqueue_read_file, |
6038f373a llseek: automatic... |
1498 |
.llseek = default_llseek, |
1da177e4c Linux-2.6.12-rc2 |
1499 |
}; |
b87221de6 const: mark remai... |
1500 |
static const struct super_operations mqueue_super_ops = { |
1da177e4c Linux-2.6.12-rc2 |
1501 |
.alloc_inode = mqueue_alloc_inode, |
015d79561 mqueue: switch to... |
1502 |
.free_inode = mqueue_free_inode, |
6d8af64c1 switch mqueue to ... |
1503 |
.evict_inode = mqueue_evict_inode, |
1da177e4c Linux-2.6.12-rc2 |
1504 |
.statfs = simple_statfs, |
1da177e4c Linux-2.6.12-rc2 |
1505 |
}; |
935c6912b ipc: Convert mque... |
1506 1507 1508 1509 |
static const struct fs_context_operations mqueue_fs_context_ops = { .free = mqueue_fs_context_free, .get_tree = mqueue_get_tree, }; |
1da177e4c Linux-2.6.12-rc2 |
1510 |
static struct file_system_type mqueue_fs_type = { |
935c6912b ipc: Convert mque... |
1511 1512 1513 1514 |
.name = "mqueue", .init_fs_context = mqueue_init_fs_context, .kill_sb = kill_litter_super, .fs_flags = FS_USERNS_MOUNT, |
1da177e4c Linux-2.6.12-rc2 |
1515 |
}; |
7eafd7c74 namespaces: ipc n... |
1516 1517 |
int mq_init_ns(struct ipc_namespace *ns) { |
935c6912b ipc: Convert mque... |
1518 |
struct vfsmount *m; |
7eafd7c74 namespaces: ipc n... |
1519 1520 1521 1522 |
ns->mq_queues_count = 0; ns->mq_queues_max = DFLT_QUEUESMAX; ns->mq_msg_max = DFLT_MSGMAX; ns->mq_msgsize_max = DFLT_MSGSIZEMAX; |
cef0184c1 mqueue: separate ... |
1523 1524 |
ns->mq_msg_default = DFLT_MSG; ns->mq_msgsize_default = DFLT_MSGSIZE; |
7eafd7c74 namespaces: ipc n... |
1525 |
|
935c6912b ipc: Convert mque... |
1526 1527 1528 1529 |
m = mq_create_mount(ns); if (IS_ERR(m)) return PTR_ERR(m); ns->mq_mnt = m; |
7eafd7c74 namespaces: ipc n... |
1530 1531 1532 1533 1534 |
return 0; } void mq_clear_sbinfo(struct ipc_namespace *ns) { |
cfb2f6f6e Revert "mqueue: s... |
1535 |
ns->mq_mnt->mnt_sb->s_fs_info = NULL; |
7eafd7c74 namespaces: ipc n... |
1536 1537 1538 1539 |
} void mq_put_mnt(struct ipc_namespace *ns) { |
cfb2f6f6e Revert "mqueue: s... |
1540 |
kern_unmount(ns->mq_mnt); |
7eafd7c74 namespaces: ipc n... |
1541 |
} |
1da177e4c Linux-2.6.12-rc2 |
1542 1543 1544 1545 1546 1547 |
static int __init init_mqueue_fs(void) { int error; mqueue_inode_cachep = kmem_cache_create("mqueue_inode_cache", sizeof(struct mqueue_inode_info), 0, |
5d097056c kmemcg: account c... |
1548 |
SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, init_once); |
1da177e4c Linux-2.6.12-rc2 |
1549 1550 |
if (mqueue_inode_cachep == NULL) return -ENOMEM; |
2329e392a mqueue: fix typo ... |
1551 |
/* ignore failures - they are not fatal */ |
bdc8e5f85 namespaces: mqueu... |
1552 |
mq_sysctl_table = mq_register_sysctl_table(); |
1da177e4c Linux-2.6.12-rc2 |
1553 1554 1555 1556 |
error = register_filesystem(&mqueue_fs_type); if (error) goto out_sysctl; |
7eafd7c74 namespaces: ipc n... |
1557 |
spin_lock_init(&mq_lock); |
6f686574c ... and the same ... |
1558 1559 |
error = mq_init_ns(&init_ipc_ns); if (error) |
1da177e4c Linux-2.6.12-rc2 |
1560 |
goto out_filesystem; |
1da177e4c Linux-2.6.12-rc2 |
1561 |
|
1da177e4c Linux-2.6.12-rc2 |
1562 1563 1564 1565 1566 1567 1568 |
return 0; out_filesystem: unregister_filesystem(&mqueue_fs_type); out_sysctl: if (mq_sysctl_table) unregister_sysctl_table(mq_sysctl_table); |
1a1d92c10 [PATCH] Really ig... |
1569 |
kmem_cache_destroy(mqueue_inode_cachep); |
1da177e4c Linux-2.6.12-rc2 |
1570 1571 |
return error; } |
6d08a2567 ipc: use device_i... |
1572 |
device_initcall(init_mqueue_fs); |