diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/msg.c | 94 | ||||
| -rw-r--r-- | net/tipc/msg.h | 99 |
2 files changed, 100 insertions, 93 deletions
diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 73dcd00d674e..381063817b41 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -40,6 +40,100 @@ #include "msg.h" #include "bearer.h" +u32 tipc_msg_tot_importance(struct tipc_msg *m) +{ + if (likely(msg_isdata(m))) { + if (likely(msg_orignode(m) == tipc_own_addr)) + return msg_importance(m); + return msg_importance(m) + 4; + } + if ((msg_user(m) == MSG_FRAGMENTER) && + (msg_type(m) == FIRST_FRAGMENT)) + return msg_importance(msg_get_wrapped(m)); + return msg_importance(m); +} + + +void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, + u32 hsize, u32 destnode) +{ + memset(m, 0, hsize); + msg_set_version(m); + msg_set_user(m, user); + msg_set_hdr_sz(m, hsize); + msg_set_size(m, hsize); + msg_set_prevnode(m, tipc_own_addr); + msg_set_type(m, type); + if (!msg_short(m)) { + msg_set_orignode(m, tipc_own_addr); + msg_set_destnode(m, destnode); + } +} + +/** + * tipc_msg_calc_data_size - determine total data size for message + */ + +int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) +{ + int dsz = 0; + int i; + + for (i = 0; i < num_sect; i++) + dsz += msg_sect[i].iov_len; + return dsz; +} + +/** + * tipc_msg_build - create message using specified header and data + * + * Note: Caller must not hold any locks in case copy_from_user() is interrupted! + * + * Returns message data size or errno + */ + +int tipc_msg_build(struct tipc_msg *hdr, + struct iovec const *msg_sect, u32 num_sect, + int max_size, int usrmem, struct sk_buff** buf) +{ + int dsz, sz, hsz, pos, res, cnt; + + dsz = tipc_msg_calc_data_size(msg_sect, num_sect); + if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { + *buf = NULL; + return -EINVAL; + } + + pos = hsz = msg_hdr_sz(hdr); + sz = hsz + dsz; + msg_set_size(hdr, sz); + if (unlikely(sz > max_size)) { + *buf = NULL; + return dsz; + } + + *buf = buf_acquire(sz); + if (!(*buf)) + return -ENOMEM; + skb_copy_to_linear_data(*buf, hdr, hsz); + for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { + if (likely(usrmem)) + res = !copy_from_user((*buf)->data + pos, + msg_sect[cnt].iov_base, + msg_sect[cnt].iov_len); + else + skb_copy_to_linear_data_offset(*buf, pos, + msg_sect[cnt].iov_base, + msg_sect[cnt].iov_len); + pos += msg_sect[cnt].iov_len; + } + if (likely(res)) + return dsz; + + buf_discard(*buf); + *buf = NULL; + return -EFAULT; +} #ifdef CONFIG_TIPC_DEBUG diff --git a/net/tipc/msg.h b/net/tipc/msg.h index fbcd46f24a9d..995d2da35b01 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -708,100 +708,13 @@ static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos) #define DSC_REQ_MSG 0 #define DSC_RESP_MSG 1 -static inline u32 tipc_msg_tot_importance(struct tipc_msg *m) -{ - if (likely(msg_isdata(m))) { - if (likely(msg_orignode(m) == tipc_own_addr)) - return msg_importance(m); - return msg_importance(m) + 4; - } - if ((msg_user(m) == MSG_FRAGMENTER) && - (msg_type(m) == FIRST_FRAGMENT)) - return msg_importance(msg_get_wrapped(m)); - return msg_importance(m); -} - - -static inline void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, - u32 hsize, u32 destnode) -{ - memset(m, 0, hsize); - msg_set_version(m); - msg_set_user(m, user); - msg_set_hdr_sz(m, hsize); - msg_set_size(m, hsize); - msg_set_prevnode(m, tipc_own_addr); - msg_set_type(m, type); - if (!msg_short(m)) { - msg_set_orignode(m, tipc_own_addr); - msg_set_destnode(m, destnode); - } -} - -/** - * tipc_msg_calc_data_size - determine total data size for message - */ - -static inline int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) -{ - int dsz = 0; - int i; - - for (i = 0; i < num_sect; i++) - dsz += msg_sect[i].iov_len; - return dsz; -} - -/** - * tipc_msg_build - create message using specified header and data - * - * Note: Caller must not hold any locks in case copy_from_user() is interrupted! - * - * Returns message data size or errno - */ - -static inline int tipc_msg_build(struct tipc_msg *hdr, +u32 tipc_msg_tot_importance(struct tipc_msg *m); +void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, + u32 hsize, u32 destnode); +int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect); +int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, u32 num_sect, - int max_size, int usrmem, struct sk_buff** buf) -{ - int dsz, sz, hsz, pos, res, cnt; - - dsz = tipc_msg_calc_data_size(msg_sect, num_sect); - if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { - *buf = NULL; - return -EINVAL; - } - - pos = hsz = msg_hdr_sz(hdr); - sz = hsz + dsz; - msg_set_size(hdr, sz); - if (unlikely(sz > max_size)) { - *buf = NULL; - return dsz; - } - - *buf = buf_acquire(sz); - if (!(*buf)) - return -ENOMEM; - skb_copy_to_linear_data(*buf, hdr, hsz); - for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { - if (likely(usrmem)) - res = !copy_from_user((*buf)->data + pos, - msg_sect[cnt].iov_base, - msg_sect[cnt].iov_len); - else - skb_copy_to_linear_data_offset(*buf, pos, - msg_sect[cnt].iov_base, - msg_sect[cnt].iov_len); - pos += msg_sect[cnt].iov_len; - } - if (likely(res)) - return dsz; - - buf_discard(*buf); - *buf = NULL; - return -EFAULT; -} + int max_size, int usrmem, struct sk_buff** buf); static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a) { |