Add capability to traverse inodes in the NuttX psuedo-filesystem
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5004 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
parent
83be13bb8d
commit
a47fb3bd2f
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@ -3118,4 +3118,6 @@
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* arch/arm/src/stm32/stm32*_rcc.c and .h: If CONFIG_PM is defined, add a
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function called stm32_clockenable() that can be used by PM logic to re-start
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the PLL after re-awakening from deep sleep modes.
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* fs/fs_foreachinode.c and fs/fs_foreachmountpoint.c: All logic to traverse
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inodes and mountpoints in the NuttX psuedo-file system.
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@ -537,7 +537,7 @@ fi
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This capability also depends on:
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<ul>
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<li><code>CONFIG_DISABLE_MOUNTPOINT</code> not set
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<li><code>CONFIG_NFILE_DESCRIPTORS</code> < 4
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<li><code>CONFIG_NFILE_DESCRIPTORS</code> > 4
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<li><code>CONFIG_FS_ROMFS</code> enabled
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</ul>
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</p>
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@ -2,7 +2,7 @@
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# drivers/bch/Make.defs
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#
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# Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bch_internal.h
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchdev_driver.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -1,8 +1,8 @@
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/****************************************************************************
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* drivers/bch/bchdev_register.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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* Copyright (C) 2008-2009, 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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@ -70,12 +70,13 @@
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* Name: bchdev_register
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*
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* Description:
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* Setup so that it exports the block driver referenced by
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* 'blkdev' as a character device 'chardev'
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* Setup so that it exports the block driver referenced by 'blkdev' as a
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* character device 'chardev'
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*
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****************************************************************************/
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int bchdev_register(const char *blkdev, const char *chardev, bool readonly)
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int bchdev_register(FAR const char *blkdev, FAR const char *chardev,
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bool readonly)
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{
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FAR void *handle;
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int ret;
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@ -1,8 +1,8 @@
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/****************************************************************************
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* drivers/bch/bchdev_unregister.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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* Copyright (C) 2008-2009, 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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@ -78,11 +78,12 @@
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* Name: bchdev_unregister
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*
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* Description:
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* Undo the setup performed by losetup
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* Unregister character driver access to a block device that was created
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* by a previous call to bchdev_register().
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*
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****************************************************************************/
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int bchdev_unregister(const char *chardev)
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int bchdev_unregister(FAR const char *chardev)
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{
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FAR struct bchlib_s *bch;
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int fd;
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@ -144,6 +145,7 @@ int bchdev_unregister(const char *chardev)
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{
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goto errout_with_lock;
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}
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sched_unlock();
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/* Release the internal structure */
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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_cache.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_read.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_sem.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_setup.c
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*
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* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_teardown.c
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*
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* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -2,7 +2,7 @@
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* drivers/bch/bchlib_write.c
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*
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* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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@ -1,7 +1,7 @@
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/****************************************************************************
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* drivers/dev_null.c
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Copyright (C) 2008-2009, 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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@ -121,6 +121,14 @@ static int devzero_poll(FAR struct file *filp, FAR struct pollfd *fds,
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: devzero_register
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*
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* Description:
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* Register /dev/zero
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*
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****************************************************************************/
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void devzero_register(void)
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{
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(void)register_driver("/dev/zero", &devzero_fops, 0666, NULL);
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@ -35,10 +35,10 @@
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-include $(TOPDIR)/Make.defs
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ASRCS =
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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ASRCS =
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AOBJS = $(ASRCS:.S=$(OBJEXT))
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CSRCS =
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CSRCS =
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# If there are no file descriptors configured, then a small part of the
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# logic in this directory may still apply to socket descriptors
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@ -48,27 +48,28 @@ ifneq ($(CONFIG_NSOCKET_DESCRIPTORS),0)
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# Socket descriptor support
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CSRCS += fs_close.c fs_read.c fs_write.c fs_ioctl.c fs_poll.c fs_select.c
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CSRCS += fs_close.c fs_read.c fs_write.c fs_ioctl.c fs_poll.c fs_select.c
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endif
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# Support for network access using streams
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ifneq ($(CONFIG_NFILE_STREAMS),0)
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CSRCS += fs_fdopen.c
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CSRCS += fs_fdopen.c
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endif
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else
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# Common file/socket descriptor support
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CSRCS += fs_open.c fs_close.c fs_read.c fs_write.c fs_ioctl.c \
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fs_poll.c fs_select.c fs_lseek.c fs_dup.c fs_filedup.c \
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fs_dup2.c fs_fcntl.c fs_filedup2.c fs_opendir.c fs_closedir.c \
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fs_stat.c fs_readdir.c fs_seekdir.c fs_rewinddir.c fs_files.c \
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fs_inode.c fs_inodefind.c fs_inodereserve.c fs_statfs.c \
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fs_inoderemove.c fs_registerdriver.c fs_unregisterdriver.c \
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fs_inodeaddref.c fs_inoderelease.c
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CSRCS += fs_registerblockdriver.c fs_unregisterblockdriver.c \
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CSRCS += fs_close.c fs_closedir.c fs_dup.c fs_dup2.c fs_fcntl.c \
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fs_filedup.c fs_filedup2.c fs_ioctl.c fs_lseek.c fs_open.c \
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fs_opendir.c fs_poll.c fs_read.c fs_readdir.c fs_rewinddir.c \
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fs_seekdir.c fs_stat.c fs_statfs.c fs_select.c fs_write.c
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CSRCS += fs_files.c fs_foreachinode.c fs_inode.c fs_inodeaddref.c \
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fs_inodefind.c fs_inoderelease.c fs_inoderemove.c \
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fs_inodereserve.c
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CSRCS += fs_registerdriver.c fs_unregisterdriver.c
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CSRCS += fs_registerblockdriver.c fs_unregisterblockdriver.c \
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fs_findblockdriver.c fs_openblockdriver.c fs_closeblockdriver.c
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include mmap/Make.defs
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@ -76,22 +77,23 @@ include mmap/Make.defs
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# Stream support
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ifneq ($(CONFIG_NFILE_STREAMS),0)
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CSRCS += fs_fdopen.c
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CSRCS += fs_fdopen.c
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endif
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# System logging to a character device (or file)
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ifeq ($(CONFIG_SYSLOG),y)
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ifeq ($(CONFIG_SYSLOG_CHAR),y)
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CSRCS += fs_syslog.c
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CSRCS += fs_syslog.c
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endif
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endif
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# Additional files required is mount-able file systems are supported
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ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
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CSRCS += fs_mount.c fs_umount.c fs_fsync.c fs_unlink.c fs_rename.c \
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fs_mkdir.c fs_rmdir.c
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CSRCS += fs_fsync.c fs_mkdir.c fs_mount.c fs_rename.c fs_rmdir.c \
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fs_umount.c fs_unlink.c
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CSRCS += fs_foreachmountpoint.c
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include fat/Make.defs
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include romfs/Make.defs
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include nxffs/Make.defs
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@ -99,15 +101,15 @@ include nfs/Make.defs
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endif
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endif
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COBJS = $(CSRCS:.c=$(OBJEXT))
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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BIN = libfs$(LIBEXT)
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SUBDIRS = mmap fat romfs nxffs:nfs
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VPATH = mmap:fat:romfs:nxffs:nfs
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SUBDIRS = mmap fat romfs nxffs:nfs
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VPATH = mmap:fat:romfs:nxffs:nfs
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all: $(BIN)
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@ -1,7 +1,7 @@
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/****************************************************************************
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* fs/fs_filedup.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Copyright (C) 2007-2009, 2011-2012 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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@ -68,10 +68,11 @@
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* Name: file_dup OR dup
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*
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* Description:
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* Clone a file descriptor to an arbitray descriptor number. If socket
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* descriptors are implemented, then this is called by dup() for the case
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* of file descriptors. If socket descriptors are not implemented, then
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* this function IS dup().
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* Clone a file descriptor 'fd' to an arbitray descriptor number (any value
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* greater than or equal to 'minfd'). If socket descriptors are
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* implemented, then this is called by dup() for the case of file
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* descriptors. If socket descriptors are not implemented, then this
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* function IS dup().
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*
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****************************************************************************/
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@ -1,7 +1,7 @@
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/****************************************************************************
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* fs/fs_filedup2.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Copyright (C) 2007-2009, 2011-2012 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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@ -64,13 +64,13 @@
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****************************************************************************/
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/****************************************************************************
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* Name: file_dup2
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* Name: file_dup2 OR dup2
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*
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* Description:
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* Clone a file descriptor or socket descriptor to a specific descriptor
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* number. If socket descriptors are implemented, then this is called by
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* dup2() for the case of file descriptors. If socket descriptors are not
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* implemented, then this function IS dup2().
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* Clone a file descriptor to a specific descriptor number. If socket
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* descriptors are implemented, then this is called by dup2() for the
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* case of file descriptors. If socket descriptors are not implemented,
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* then this function IS dup2().
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*
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****************************************************************************/
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@ -56,7 +56,7 @@
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****************************************************************************/
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/****************************************************************************
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* Public Types
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* Private Types
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****************************************************************************/
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/****************************************************************************
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@ -182,7 +182,8 @@ FAR struct filelist *files_alloclist(void)
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/****************************************************************************
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* Name: files_addreflist
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*
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* Description: Increase the reference count on a file list
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* Description:
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* Increase the reference count on a file list
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*
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****************************************************************************/
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@ -209,7 +210,8 @@ int files_addreflist(FAR struct filelist *list)
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/****************************************************************************
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* Name: files_releaselist
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*
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* Description: Release a reference to the file list
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* Description:
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* Release a reference to the file list
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*
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****************************************************************************/
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@ -264,7 +266,8 @@ int files_releaselist(FAR struct filelist *list)
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* Name: files_dup
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*
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* Description:
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* Assign an inode to a specific files structure. This is the heart of dup2.
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* Assign an inode to a specific files structure. This is the heart of
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* dup2.
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*
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****************************************************************************/
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@ -1,7 +1,7 @@
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/****************************************************************************
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* fs_open.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Copyright (C) 2007-2009, 2011-2012 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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@ -58,6 +58,10 @@
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/****************************************************************************
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* Name: inode_checkflags
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*
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* Description:
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* Check if the access described by 'oflags' is supported on 'inode'
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*
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****************************************************************************/
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int inode_checkflags(FAR struct inode *inode, int oflags)
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@ -75,6 +79,10 @@ int inode_checkflags(FAR struct inode *inode, int oflags)
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/****************************************************************************
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* Name: open
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*
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* Description:
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* Standard 'open' interface
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*
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****************************************************************************/
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int open(const char *path, int oflags, ...)
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@ -67,7 +67,7 @@
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****************************************************************************/
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/****************************************************************************
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* Name: register_driver
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* Name: register_blockdriver
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*
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* Description:
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* Register a block driver inode the pseudo file system.
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|
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@ -68,7 +68,11 @@
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****************************************************************************/
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/****************************************************************************
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* Name: unregister_blockdriver()
|
||||
* Name: unregister_blockdriver
|
||||
*
|
||||
* Description:
|
||||
* Remove the block driver inode at 'path' from the psuedo-file system
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int unregister_blockdriver(const char *path)
|
||||
|
|
|
|||
|
|
@ -68,7 +68,11 @@
|
|||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: unregister_driver()
|
||||
* Name: unregister_driver
|
||||
*
|
||||
* Description:
|
||||
* Remove the character driver inode at 'path' from the psuedo-file system
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int unregister_driver(FAR const char *path)
|
||||
|
|
|
|||
|
|
@ -216,6 +216,12 @@ struct inode
|
|||
};
|
||||
#define FSNODE_SIZE(n) (sizeof(struct inode) + (n))
|
||||
|
||||
/* Callback used by foreach_inode to traverse all inodes in the pseudo-
|
||||
* file system.
|
||||
*/
|
||||
|
||||
typedef int (*foreach_inode_t)(FAR struct inode *inode, FAR void *arg);
|
||||
|
||||
/* This is the underlying representation of an open file. A file
|
||||
* descriptor is an index into an array of such types. The type associates
|
||||
* the file descriptor to the file state and to a set of inode operations.
|
||||
|
|
@ -307,76 +313,302 @@ extern "C" {
|
|||
#endif
|
||||
|
||||
/* fs_inode.c ***************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: fs_initialize
|
||||
*
|
||||
* Description:
|
||||
* This is called from the OS initialization logic to configure the file
|
||||
* system.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/* These interfaces are used by drivers to register their
|
||||
* inodes in the inode tree.
|
||||
*/
|
||||
EXTERN void weak_function fs_initialize(void);
|
||||
|
||||
EXTERN void weak_function fs_initialize(void);
|
||||
/* fs_foreachinode.c ********************************************************/
|
||||
/****************************************************************************
|
||||
* Name: foreach_inode
|
||||
*
|
||||
* Description:
|
||||
* Visit each inode in the pseudo-file system. The traversal is terminated
|
||||
* when the callback 'handler' returns a non-zero value, or when all of
|
||||
* the inodes have been visited.
|
||||
*
|
||||
* NOTE 1: Use with caution... The psuedo-file system is locked throughout
|
||||
* the traversal.
|
||||
* NOTE 2: The search algorithm is recursive and could, in principle, use
|
||||
* an indeterminant amount of stack space. This will not usually be a
|
||||
* real work issue.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int foreach_inode(foreach_inode_t handler, FAR void *arg);
|
||||
|
||||
/* fs_foreachmountpoint.c ***************************************************/
|
||||
/****************************************************************************
|
||||
* Name: foreach_mountpoint
|
||||
*
|
||||
* Description:
|
||||
* Visit each mountpoint in the pseudo-file system. The traversal is
|
||||
* terminated when the callback 'handler' returns a non-zero value, or when
|
||||
* all of the mountpoints have been visited.
|
||||
*
|
||||
* This is just a front end "filter" to foreach_inode() that forwards only
|
||||
* mountpoint inodes. It is intended to support the mount() command to
|
||||
* when the mount command is used to enumerate mounts.
|
||||
*
|
||||
* NOTE 1: Use with caution... The psuedo-file system is locked throughout
|
||||
* the traversal.
|
||||
* NOTE 2: The search algorithm is recursive and could, in principle, use
|
||||
* an indeterminant amount of stack space. This will not usually be a
|
||||
* real work issue.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_DISABLE_MOUNTPOUNT
|
||||
EXTERN int foreach_mountpoint(foreach_inode_t handler, FAR void *arg);
|
||||
#endif
|
||||
|
||||
/* fs_registerdriver.c ******************************************************/
|
||||
/****************************************************************************
|
||||
* Name: register_driver
|
||||
*
|
||||
* Description:
|
||||
* Register a character driver inode the pseudo file system.
|
||||
*
|
||||
* Input parameters:
|
||||
* path - The path to the inode to create
|
||||
* fops - The file operations structure
|
||||
* mode - inmode priviledges (not used)
|
||||
* priv - Private, user data that will be associated with the inode.
|
||||
*
|
||||
* Returned Value:
|
||||
* Zero on success (with the inode point in 'inode'); A negated errno
|
||||
* value is returned on a failure (all error values returned by
|
||||
* inode_reserve):
|
||||
*
|
||||
* EINVAL - 'path' is invalid for this operation
|
||||
* EEXIST - An inode already exists at 'path'
|
||||
* ENOMEM - Failed to allocate in-memory resources for the operation
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int register_driver(const char *path,
|
||||
const struct file_operations *fops,
|
||||
mode_t mode, void *priv);
|
||||
|
||||
/* fs_registerdriver.c ******************************************************/
|
||||
/* fs_registerblockdriver.c *************************************************/
|
||||
/****************************************************************************
|
||||
* Name: register_blockdriver
|
||||
*
|
||||
* Description:
|
||||
* Register a block driver inode the pseudo file system.
|
||||
*
|
||||
* Input parameters:
|
||||
* path - The path to the inode to create
|
||||
* bops - The block driver operations structure
|
||||
* mode - inmode priviledges (not used)
|
||||
* priv - Private, user data that will be associated with the inode.
|
||||
*
|
||||
* Returned Value:
|
||||
* Zero on success (with the inode point in 'inode'); A negated errno
|
||||
* value is returned on a failure (all error values returned by
|
||||
* inode_reserve):
|
||||
*
|
||||
* EINVAL - 'path' is invalid for this operation
|
||||
* EEXIST - An inode already exists at 'path'
|
||||
* ENOMEM - Failed to allocate in-memory resources for the operation
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int register_blockdriver(const char *path,
|
||||
const struct block_operations *bops,
|
||||
mode_t mode, void *priv);
|
||||
|
||||
/* fs_unregisterdriver.c ****************************************************/
|
||||
/****************************************************************************
|
||||
* Name: unregister_driver
|
||||
*
|
||||
* Description:
|
||||
* Remove the character driver inode at 'path' from the psuedo-file system
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int unregister_driver(const char *path);
|
||||
|
||||
/* fs_unregisterblockdriver.c ***********************************************/
|
||||
/****************************************************************************
|
||||
* Name: unregister_blockdriver
|
||||
*
|
||||
* Description:
|
||||
* Remove the block driver inode at 'path' from the psuedo-file system
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int unregister_blockdriver(const char *path);
|
||||
|
||||
/* fs_open.c ****************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: inode_checkflags
|
||||
*
|
||||
* Description:
|
||||
* Check if the access described by 'oflags' is supported on 'inode'
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int inode_checkflags(FAR struct inode *inode, int oflags);
|
||||
|
||||
/* fs_files.c ***************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: files_alloclist
|
||||
*
|
||||
* Description: Allocate a list of files for a new task
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS >0
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN FAR struct filelist *files_alloclist(void);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: files_addreflist
|
||||
*
|
||||
* Description:
|
||||
* Increase the reference count on a file list
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int files_addreflist(FAR struct filelist *list);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: files_releaselist
|
||||
*
|
||||
* Description:
|
||||
* Release a reference to the file list
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int files_releaselist(FAR struct filelist *list);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: files_dup
|
||||
*
|
||||
* Description:
|
||||
* Assign an inode to a specific files structure. This is the heart of
|
||||
* dup2.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int files_dup(FAR struct file *filep1, FAR struct file *filep2);
|
||||
#endif
|
||||
|
||||
/* fs_filedup.c *************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: file_dup OR dup
|
||||
*
|
||||
* Description:
|
||||
* Clone a file descriptor 'fd' to an arbitray descriptor number (any value
|
||||
* greater than or equal to 'minfd'). If socket descriptors are
|
||||
* implemented, then this is called by dup() for the case of file
|
||||
* descriptors. If socket descriptors are not implemented, then this
|
||||
* function IS dup().
|
||||
*
|
||||
* This alternative naming is used when dup could operate on both file and
|
||||
* socket descritors to avoid drawing unused socket support into the link.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/* Dupicate a file descriptor using any value greater than or equal to minfd */
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int file_dup(int fd, int minfd);
|
||||
#endif
|
||||
|
||||
/* fs_filedup2.c ************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: file_dup2 OR dup2
|
||||
*
|
||||
* Description:
|
||||
* Clone a file descriptor to a specific descriptor number. If socket
|
||||
* descriptors are implemented, then this is called by dup2() for the
|
||||
* case of file descriptors. If socket descriptors are not implemented,
|
||||
* then this function IS dup2().
|
||||
*
|
||||
* This alternative naming is used when dup2 could operate on both file and
|
||||
* socket descritors to avoid drawing unused socket support into the link.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/* This alternative naming is used when dup could operate on both file and
|
||||
* socket descritors to avoid drawing unused socket support into the link.
|
||||
*/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
|
||||
EXTERN int file_dup2(int fd1, int fd2);
|
||||
#else
|
||||
# define file_dup2(fd1, fd2) dup2(fd1, fd2)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* fs_openblockdriver.c *****************************************************/
|
||||
/****************************************************************************
|
||||
* Name: open_blockdriver
|
||||
*
|
||||
* Description:
|
||||
* Return the inode of the block driver specified by 'pathname'
|
||||
*
|
||||
* Inputs:
|
||||
* pathname - the full path to the block driver to be opened
|
||||
* mountflags - if MS_RDONLY is not set, then driver must support write
|
||||
* operations (see include/sys/mount.h)
|
||||
* ppinode - address of the location to return the inode reference
|
||||
*
|
||||
* Return:
|
||||
* Returns zero on success or a negated errno on failure:
|
||||
*
|
||||
* EINVAL - pathname or pinode is NULL
|
||||
* ENOENT - No block driver of this name is registered
|
||||
* ENOTBLK - The inode associated with the pathname is not a block driver
|
||||
* EACCESS - The MS_RDONLY option was not set but this driver does not
|
||||
* support write access
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int open_blockdriver(FAR const char *pathname, int mountflags,
|
||||
FAR struct inode **ppinode);
|
||||
#endif
|
||||
|
||||
/* fs_closeblockdriver.c ****************************************************/
|
||||
/****************************************************************************
|
||||
* Name: close_blockdriver
|
||||
*
|
||||
* Description:
|
||||
* Call the close method and release the inode
|
||||
*
|
||||
* Inputs:
|
||||
* inode - reference to the inode of a block driver opened by open_blockdriver
|
||||
*
|
||||
* Return:
|
||||
* Returns zero on success or a negated errno on failure:
|
||||
*
|
||||
* EINVAL - inode is NULL
|
||||
* ENOTBLK - The inode is not a block driver
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_DESCRIPTORS > 0
|
||||
EXTERN int close_blockdriver(FAR struct inode *inode);
|
||||
#endif
|
||||
|
||||
/* fs_fdopen.c **************************************************************/
|
||||
|
||||
/* Used by the OS to clone stdin, stdout, stderr */
|
||||
/****************************************************************************
|
||||
* Name: fs_fdopen
|
||||
*
|
||||
* Description:
|
||||
* This function does the core operations for fopen and fdopen. It is
|
||||
* used by the OS to clone stdin, stdout, stderr
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_STREAMS > 0
|
||||
|
||||
|
|
@ -388,48 +620,144 @@ typedef struct _TCB _TCB;
|
|||
EXTERN FAR struct file_struct *fs_fdopen(int fd, int oflags, FAR _TCB *tcb);
|
||||
#endif
|
||||
|
||||
/* lib_fflush.c *************************************************************/
|
||||
/* lib/stdio/lib_fflush.c **************************************************/
|
||||
/****************************************************************************
|
||||
* Name: lib_flushall
|
||||
*
|
||||
* Description:
|
||||
* Called either (1) by the OS when a task exits, or (2) from fflush()
|
||||
* when a NULL stream argument is provided.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if CONFIG_NFILE_STREAMS > 0
|
||||
EXTERN int lib_flushall(FAR struct streamlist *list);
|
||||
#endif
|
||||
|
||||
/* drivers ******************************************************************/
|
||||
|
||||
/* Call any of these to register the corresponding drivers in the drivers/
|
||||
* subdirectory
|
||||
*/
|
||||
|
||||
/* Register /dev/null and /dev/zero */
|
||||
/* drivers/dev_null.c *******************************************************/
|
||||
/****************************************************************************
|
||||
* Name: devnull_register
|
||||
*
|
||||
* Description:
|
||||
* Register /dev/null
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN void devnull_register(void);
|
||||
|
||||
/* drivers/dev_zero.c *******************************************************/
|
||||
/****************************************************************************
|
||||
* Name: devzero_register
|
||||
*
|
||||
* Description:
|
||||
* Register /dev/zero
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN void devzero_register(void);
|
||||
|
||||
/* Setup the loop device so that it exports the file referenced by 'filename'
|
||||
* as a block device.
|
||||
*/
|
||||
|
||||
EXTERN int losetup(const char *devname, const char *filename, uint16_t sectsize,
|
||||
off_t offset, bool readonly);
|
||||
EXTERN int loteardown(const char *devname);
|
||||
|
||||
/* Setup so that the block driver referenced by 'blkdev' can be accessed
|
||||
* similar to a character device.
|
||||
/* drivers/loop.c ***********************************************************/
|
||||
/****************************************************************************
|
||||
* Name: losetup
|
||||
*
|
||||
* Access via a character device:
|
||||
*/
|
||||
* Description:
|
||||
* Setup the loop device so that it exports the file referenced by 'filename'
|
||||
* as a block device.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int bchdev_register(const char *blkdev, const char *chardev, bool readonly);
|
||||
EXTERN int bchdev_unregister(const char *chardev);
|
||||
EXTERN int losetup(FAR const char *devname, FAR const char *filename,
|
||||
uint16_t sectsize, off_t offset, bool readonly);
|
||||
|
||||
/****************************************************************************
|
||||
* Name: loteardown
|
||||
*
|
||||
* Description:
|
||||
* Undo the setup performed by losetup
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int loteardown(FAR const char *devname);
|
||||
|
||||
/* drivers/bch/bchdev_register.c ********************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchdev_register
|
||||
*
|
||||
* Description:
|
||||
* Setup so that it exports the block driver referenced by 'blkdev' as a
|
||||
* character device 'chardev'
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int bchdev_register(FAR const char *blkdev, FAR const char *chardev,
|
||||
bool readonly);
|
||||
|
||||
/* drivers/bch/bchdev_unregister.c ******************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchdev_unregister
|
||||
*
|
||||
* Description:
|
||||
* Unregister character driver access to a block device that was created
|
||||
* by a previous call to bchdev_register().
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int bchdev_unregister(FAR const char *chardev);
|
||||
|
||||
/* Low level, direct access. NOTE: low-level access and character driver access
|
||||
* are incompatible. One and only one access method should be implemented.
|
||||
*/
|
||||
|
||||
EXTERN int bchlib_setup(const char *blkdev, bool readonly, FAR void **handle);
|
||||
/* drivers/bch/bchlib_setup.c ***********************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchlib_setup
|
||||
*
|
||||
* Description:
|
||||
* Setup so that the block driver referenced by 'blkdev' can be accessed
|
||||
* similar to a character device.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int bchlib_setup(FAR const char *blkdev, bool readonly,
|
||||
FAR void **handle);
|
||||
|
||||
/* drivers/bch/bchlib_teardown.c ********************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchlib_teardown
|
||||
*
|
||||
* Description:
|
||||
* Setup so that the block driver referenced by 'blkdev' can be accessed
|
||||
* similar to a character device.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN int bchlib_teardown(FAR void *handle);
|
||||
EXTERN ssize_t bchlib_read(FAR void *handle, FAR char *buffer, size_t offset, size_t len);
|
||||
EXTERN ssize_t bchlib_write(FAR void *handle, FAR const char *buffer, size_t offset, size_t len);
|
||||
|
||||
/* drivers/bch/bchlib_read.c ************************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchlib_read
|
||||
*
|
||||
* Description:
|
||||
* Read from the block device set-up by bchlib_setup as if it were a
|
||||
* character device.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN ssize_t bchlib_read(FAR void *handle, FAR char *buffer, size_t offset,
|
||||
size_t len);
|
||||
|
||||
/* drivers/bch/bchlib_write.c ***********************************************/
|
||||
/****************************************************************************
|
||||
* Name: bchlib_write
|
||||
*
|
||||
* Description:
|
||||
* Write to the block device set-up by bchlib_setup as if it were a
|
||||
* character device.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
EXTERN ssize_t bchlib_write(FAR void *handle, FAR const char *buffer,
|
||||
size_t offset, size_t len);
|
||||
|
||||
#undef EXTERN
|
||||
#if defined(__cplusplus)
|
||||
|
|
|
|||
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Reference in New Issue