574178d5e6
- 77115: Implement support for O_DIRECT. - 98425: Fix a performance issue introduced in 70131 that was causing reads before writes even when writing full blocks. - 98658: Rename the BALLOC flags from B_* to BA_* to avoid confusion with the struct buf B_ flags. - 100344: Merge the BA_ and IO_ flags so so that they may both be used in the same flags word. This merger is possible by assigning the IO_ flags to the low sixteen bits and the BA_ flags the high sixteen bits. - 105422: Fix a file-rewrite performance case. - 129545: Implement IO_INVAL in VOP_WRITE() by marking the buffer as "no cache". - Readd the DOINGASYNC() macro and use it to control asynchronous writes. Change i-node updates to honor DOINGASYNC() instead of always being synchronous. - Use a PRIV_VFS_RETAINSUGID check instead of checking cr_uid against 0 directly when deciding whether or not to clear suid and sgid bits. Submitted by: Pedro F. Giffuni giffunip at yahoo
174 lines
6.8 KiB
C
174 lines
6.8 KiB
C
/*-
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be 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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)inode.h 8.9 (Berkeley) 5/14/95
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* $FreeBSD$
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*/
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#ifndef _FS_EXT2FS_INODE_H_
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#define _FS_EXT2FS_INODE_H_
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#include <sys/lock.h>
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#include <sys/queue.h>
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#define NDADDR 12 /* Direct addresses in inode. */
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#define NIADDR 3 /* Indirect addresses in inode. */
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/*
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* This must agree with the definition in <ufs/ufs/dir.h>.
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*/
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#define doff_t int32_t
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/*
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* The inode is used to describe each active (or recently active) file in the
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* EXT2FS filesystem. It is composed of two types of information. The first
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* part is the information that is needed only while the file is active (such
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* as the identity of the file and linkage to speed its lookup). The second
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* part is the permanent meta-data associated with the file which is read in
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* from the permanent dinode from long term storage when the file becomes
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* active, and is put back when the file is no longer being used.
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*/
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struct inode {
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struct vnode *i_vnode;/* Vnode associated with this inode. */
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struct ext2mount *i_ump;
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uint32_t i_flag; /* flags, see below */
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ino_t i_number; /* The identity of the inode. */
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struct m_ext2fs *i_e2fs; /* EXT2FS */
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u_quad_t i_modrev; /* Revision level for NFS lease. */
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/*
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* Side effects; used during directory lookup.
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*/
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int32_t i_count; /* Size of free slot in directory. */
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doff_t i_endoff; /* End of useful stuff in directory. */
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doff_t i_diroff; /* Offset in dir, where we found last entry. */
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doff_t i_offset; /* Offset of free space in directory. */
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uint32_t i_block_group;
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uint32_t i_next_alloc_block;
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uint32_t i_next_alloc_goal;
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uint32_t i_prealloc_block;
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uint32_t i_prealloc_count;
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/* Fields from struct dinode in UFS. */
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uint16_t i_mode; /* IFMT, permissions; see below. */
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int16_t i_nlink; /* File link count. */
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uint64_t i_size; /* File byte count. */
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int32_t i_atime; /* Last access time. */
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int32_t i_atimensec; /* Last access time. */
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int32_t i_mtime; /* Last modified time. */
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int32_t i_mtimensec; /* Last modified time. */
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int32_t i_ctime; /* Last inode change time. */
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int32_t i_ctimensec; /* Last inode change time. */
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int32_t i_db[NDADDR]; /* Direct disk blocks. */
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int32_t i_ib[NIADDR]; /* Indirect disk blocks. */
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uint32_t i_flags; /* Status flags (chflags). */
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int32_t i_blocks; /* Blocks actually held. */
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int32_t i_gen; /* Generation number. */
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uint32_t i_uid; /* File owner. */
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uint32_t i_gid; /* File group. */
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};
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/*
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* The di_db fields may be overlaid with other information for
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* file types that do not have associated disk storage. Block
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* and character devices overlay the first data block with their
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* dev_t value. Short symbolic links place their path in the
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* di_db area.
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*/
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#define i_shortlink i_db
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#define i_rdev i_db[0]
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#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(int32_t))
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/* File permissions. */
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#define IEXEC 0000100 /* Executable. */
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#define IWRITE 0000200 /* Writeable. */
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#define IREAD 0000400 /* Readable. */
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#define ISVTX 0001000 /* Sticky bit. */
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#define ISGID 0002000 /* Set-gid. */
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#define ISUID 0004000 /* Set-uid. */
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/* File types. */
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#define IFMT 0170000 /* Mask of file type. */
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#define IFIFO 0010000 /* Named pipe (fifo). */
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#define IFCHR 0020000 /* Character device. */
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#define IFDIR 0040000 /* Directory file. */
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#define IFBLK 0060000 /* Block device. */
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#define IFREG 0100000 /* Regular file. */
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#define IFLNK 0120000 /* Symbolic link. */
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#define IFSOCK 0140000 /* UNIX domain socket. */
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#define IFWHT 0160000 /* Whiteout. */
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/* These flags are kept in i_flag. */
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#define IN_ACCESS 0x0001 /* Access time update request. */
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#define IN_CHANGE 0x0002 /* Inode change time update request. */
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#define IN_UPDATE 0x0004 /* Modification time update request. */
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#define IN_MODIFIED 0x0008 /* Inode has been modified. */
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#define IN_RENAME 0x0010 /* Inode is being renamed. */
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#define IN_HASHED 0x0020 /* Inode is on hash list */
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#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
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#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
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#define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the
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suspension finished */
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#define i_devvp i_ump->um_devvp
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#ifdef _KERNEL
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/*
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* Structure used to pass around logical block paths generated by
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* ext2_getlbns and used by truncate and bmap code.
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*/
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struct indir {
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int32_t in_lbn; /* Logical block number. */
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int in_off; /* Offset in buffer. */
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int in_exists; /* Flag if the block exists. */
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};
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/* Convert between inode pointers and vnode pointers. */
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#define VTOI(vp) ((struct inode *)(vp)->v_data)
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#define ITOV(ip) ((ip)->i_vnode)
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/* Check whether the MNTK_ASYNC flag has been set for a mount point */
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#define DOINGASYNC(vp) ((vp)->v_mount->mnt_kern_flag & MNTK_ASYNC)
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/* This overlays the fid structure (see mount.h). */
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struct ufid {
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uint16_t ufid_len; /* Length of structure. */
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uint16_t ufid_pad; /* Force 32-bit alignment. */
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ino_t ufid_ino; /* File number (ino). */
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int32_t ufid_gen; /* Generation number. */
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};
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#endif /* _KERNEL */
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#endif /* !_FS_EXT2FS_INODE_H_ */
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