e3b8d4bb58
This patch adds the implementation of the BSD socket system calls which have been introduced in an earlier patch. At the same time, it adds support for communication with socket drivers, using a new "socket device" (SDEV_) protocol. These two parts, implemented in socket.c and sdev.c respectively, form the upper and lower halves of the new BSD socket support in VFS. New mapping functionality for socket domains and drivers is added as well, implemented in smap.c. The rest of the changes mainly facilitate the separation of character and socket driver calls, and do not make any fundamental alterations. For example, while this patch changes VFS's select.c rather heavily, the new select logic for socket drivers is the exact same as for character drivers; the changes mainly separate the driver type specific parts from the generic select logic further than before. Change-Id: I2f13084dd3c8d3a68bfc69da0621120c8291f707
55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
#ifndef __VFS_CONST_H__
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#define __VFS_CONST_H__
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/* Tables sizes */
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#define NR_FILPS 1024 /* # slots in filp table */
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#define NR_LOCKS 8 /* # slots in the file locking table */
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#define NR_MNTS 16 /* # slots in mount table */
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#define NR_VNODES 1024 /* # slots in vnode table */
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#define NR_WTHREADS 9 /* # slots in worker thread table */
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#define NR_SOCKDEVS 8 /* # slots in smap table */
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#define NR_NONEDEVS NR_MNTS /* # slots in nonedev bitmap */
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/* Miscellaneous constants */
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#define SU_UID ((uid_t) 0) /* super_user's uid_t */
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#define SYS_UID ((uid_t) 0) /* uid_t for system processes and INIT */
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#define SYS_GID ((gid_t) 0) /* gid_t for system processes and INIT */
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#define FP_BLOCKED_ON_NONE 0 /* not blocked */
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#define FP_BLOCKED_ON_PIPE 1 /* susp'd on pipe */
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#define FP_BLOCKED_ON_FLOCK 2 /* susp'd on file lock */
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#define FP_BLOCKED_ON_POPEN 3 /* susp'd on pipe open */
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#define FP_BLOCKED_ON_SELECT 4 /* susp'd on select */
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#define FP_BLOCKED_ON_CDEV 5 /* blocked on character device I/O */
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#define FP_BLOCKED_ON_SDEV 6 /* blocked on socket I/O */
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/* test if the process is blocked on something */
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#define fp_is_blocked(fp) ((fp)->fp_blocked_on != FP_BLOCKED_ON_NONE)
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#define INVALID_THREAD ((thread_t) -1) /* known-invalid thread ID */
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#define SYMLOOP 16
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#define LABEL_MAX 16 /* maximum label size (including '\0'). Should
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* not be smaller than 16 or bigger than
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* M_PATH_STRING_MAX.
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*/
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#define FSTYPE_MAX VFS_NAMELEN /* maximum file system type size */
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/* possible select() operation types; read, write, errors */
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#define SEL_RD CDEV_OP_RD
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#define SEL_WR CDEV_OP_WR
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#define SEL_ERR CDEV_OP_ERR
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#define SEL_NOTIFY CDEV_NOTIFY /* not a real select operation */
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/* If these constants diverge, VFS must be extended to perform mapping. */
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#if (CDEV_OP_RD != SDEV_OP_RD || CDEV_OP_WR != SDEV_OP_WR || \
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CDEV_OP_ERR != SDEV_OP_ERR || CDEV_NOTIFY != SDEV_NOTIFY)
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#error "CDEV and SDEV select constants are different"
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#endif
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/* special driver endpoint for CTTY_MAJOR; must be able to pass isokendpt() */
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#define CTTY_ENDPT VFS_PROC_NR
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#endif
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