44d88abb83
There are two issues with it however:
1. Reading from file system on a per packet basis could be slow. I think it probably should have a small, in-memory cache of most frequently used routes for good problem.
2. Currently the delroute logic is disabled due to a problem with the design. NuttX does not currently support truncate(). Therefore, it is not possible to delete entries from the routing table file.
In this current implementation, that leaves the last entry intact at the end of the file. An alternative design might include a tag on each record to indicate if the record is valid or not. That would work but would add complexity to the other routing table functions.
The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y.
Squashed commit of the following:
net/route: The current delroute design depends on file truncation. However, NuttX does not currently support truncate. Alternative, more complex designs are possible but not implemented. At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL. Enable it only if you plan to fix it.
net/route: Fix some issues with locking routing table files.
net/route: Add partial implementation of delroute for the case where the routing table is in a file.
net/route: Add support for seeking to positions in the routing table.
net/route: Add net_addroute_ipv4/6() using a file-based routing table.
net/route: Add net_foreach_ipv4/4() using a file-based routing table.
net/route: Initial build, configuration, and fs utilies to support routing tables in a file.
166 lines
6.0 KiB
C
166 lines
6.0 KiB
C
/****************************************************************************
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* include/sys/stat.h
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*
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* Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_STAT_H
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#define __INCLUDE_SYS_STAT_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <time.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* mode_t bit settings (most of these do not apply to Nuttx). This assumes
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* that the full size of a mode_t is 16-bits. (However, mode_t must be size
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* 'int' because it is promoted to size int when passed in varargs).
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*
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* LTTT ...U UUGG GOOO
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*
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* Bits 0-2: Permissions for others
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* Bits 3-5: Group permissions
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* Bits 6-8: Owner permissions
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* Bits 9-11: Not used
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* Bits 12-14: File type bits
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* Bit 15: Symbolic link
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*/
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#define S_IXOTH (1 << 0) /* Bits 0-2: Permissions for others: RWX */
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#define S_IWOTH (1 << 1)
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#define S_IROTH (1 << 2)
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#define S_IRWXO (7 << 0)
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#define S_IXGRP (1 << 3) /* Bits 3-5: Group permissions: RWX */
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#define S_IWGRP (1 << 4)
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#define S_IRGRP (1 << 5)
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#define S_IRWXG (7 << 3)
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#define S_IXUSR (1 << 6) /* Bits 6-8: Owner permissions: RWX */
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#define S_IWUSR (1 << 7)
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#define S_IRUSR (1 << 8)
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#define S_IRWXU (7 << 6)
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#define S_ISVTX 0 /* "Sticky" bit (not used) */
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#define S_ISGID 0 /* Set group ID bit (not used)*/
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#define S_ISUID 0 /* Set UID bit (not used) */
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#define S_IFIFO 0 /* Bits 12-14: File type bits (not all used) */
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#define S_IFCHR (1 << 12)
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#define S_IFDIR (2 << 12)
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#define S_IFBLK (3 << 12)
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#define S_IFREG (4 << 12)
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#define S_IFSOCK 0
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#define S_IFMQ (5 << 12)
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#define S_IFSEM (6 << 12)
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#define S_IFSHM (7 << 12)
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#define s_IFTGT (7 << 12) /* May be the target of a symbolic link */
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#define S_IFLNK (1 << 15) /* Bit 15: Symbolic link */
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#define S_IFMT (15 << 15) /* Bits 12-15: Full file type */
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/* File type macros that operate on an instance of mode_t */
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#define S_ISLNK(m) (((m) & S_IFLNK) != 0)
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#define S_ISFIFO(m) (0)
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#define S_ISCHR(m) (((m) & s_IFTGT) == S_IFCHR)
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#define S_ISDIR(m) (((m) & s_IFTGT) == S_IFDIR)
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#define S_ISBLK(m) (((m) & s_IFTGT) == S_IFBLK)
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#define S_ISREG(m) (((m) & s_IFTGT) == S_IFREG)
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#define S_ISSOCK(m) (0)
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#define S_ISMQ(m) (((m) & s_IFTGT) == S_IFMQ)
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#define S_ISSEM(m) (((m) & s_IFTGT) == S_IFSEM)
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#define S_ISSHM(m) (((m) & s_IFTGT) == S_IFSHM)
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/****************************************************************************
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* Type Definitions
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****************************************************************************/
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/* This is the simplified struct stat as returned by stat() and fstat().
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* This structure provides information about a specific file or directory in
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* the file system.
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*/
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struct stat
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{
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/* Required, standard fields */
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mode_t st_mode; /* File type, atributes, and access mode bits */
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off_t st_size; /* Size of file/directory, in bytes */
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blksize_t st_blksize; /* Blocksize used for filesystem I/O */
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blkcnt_t st_blocks; /* Number of blocks allocated */
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time_t st_atime; /* Time of last access */
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time_t st_mtime; /* Time of last modification */
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time_t st_ctime; /* Time of last status change */
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/* Internal fields. These are part this specific implementation and
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* should not referenced by application code for portability reasons.
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*/
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#ifdef CONFIG_PSEUDOFS_SOFTLINKS
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uint8_t st_count; /* Used internally to limit traversal of links */
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#endif
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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int mkdir(FAR const char *pathname, mode_t mode);
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int mkfifo(FAR const char *pathname, mode_t mode);
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int stat(FAR const char *path, FAR struct stat *buf);
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int fstat(int fd, FAR struct stat *buf);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYS_STAT_H */
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