Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
680
fs/xfs/linux-2.6/xfs_iops.c
Normal file
680
fs/xfs/linux-2.6/xfs_iops.c
Normal file
@@ -0,0 +1,680 @@
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/*
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* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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||||
* published by the Free Software Foundation.
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*
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||||
* This program is distributed in the hope that it would be useful, but
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||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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||||
* otherwise, applies only to this software file. Patent licenses, if
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||||
* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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||||
* You should have received a copy of the GNU General Public License along
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||||
* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_inum.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_dmapi.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dir_sf.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_bmap.h"
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#include "xfs_bit.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_rw.h"
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#include "xfs_acl.h"
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#include "xfs_cap.h"
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#include "xfs_mac.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_utils.h"
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#include <linux/xattr.h>
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#include <linux/namei.h>
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/*
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* Pull the link count and size up from the xfs inode to the linux inode
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*/
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STATIC void
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validate_fields(
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struct inode *ip)
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{
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vnode_t *vp = LINVFS_GET_VP(ip);
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vattr_t va;
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int error;
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va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
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VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error);
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if (likely(!error)) {
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ip->i_nlink = va.va_nlink;
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ip->i_blocks = va.va_nblocks;
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/* we're under i_sem so i_size can't change under us */
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if (i_size_read(ip) != va.va_size)
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i_size_write(ip, va.va_size);
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}
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}
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/*
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* Determine whether a process has a valid fs_struct (kernel daemons
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* like knfsd don't have an fs_struct).
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*
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* XXX(hch): nfsd is broken, better fix it instead.
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*/
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STATIC inline int
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has_fs_struct(struct task_struct *task)
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{
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return (task->fs != init_task.fs);
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}
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STATIC int
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linvfs_mknod(
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struct inode *dir,
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struct dentry *dentry,
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int mode,
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dev_t rdev)
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{
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struct inode *ip;
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vattr_t va;
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vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir);
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xfs_acl_t *default_acl = NULL;
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attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
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int error;
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/*
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* Irix uses Missed'em'V split, but doesn't want to see
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* the upper 5 bits of (14bit) major.
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*/
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if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)
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return -EINVAL;
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if (test_default_acl && test_default_acl(dvp)) {
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if (!_ACL_ALLOC(default_acl))
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return -ENOMEM;
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if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
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_ACL_FREE(default_acl);
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default_acl = NULL;
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}
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}
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if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current))
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mode &= ~current->fs->umask;
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memset(&va, 0, sizeof(va));
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va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
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va.va_type = IFTOVT(mode);
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va.va_mode = mode;
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switch (mode & S_IFMT) {
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case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
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va.va_rdev = sysv_encode_dev(rdev);
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va.va_mask |= XFS_AT_RDEV;
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/*FALLTHROUGH*/
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case S_IFREG:
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VOP_CREATE(dvp, dentry, &va, &vp, NULL, error);
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break;
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case S_IFDIR:
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VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error);
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break;
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default:
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error = EINVAL;
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break;
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}
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if (default_acl) {
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if (!error) {
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error = _ACL_INHERIT(vp, &va, default_acl);
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if (!error) {
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VMODIFY(vp);
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} else {
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struct dentry teardown = {};
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int err2;
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/* Oh, the horror.
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* If we can't add the ACL we must back out.
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* ENOSPC can hit here, among other things.
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*/
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teardown.d_inode = ip = LINVFS_GET_IP(vp);
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teardown.d_name = dentry->d_name;
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vn_mark_bad(vp);
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if (S_ISDIR(mode))
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VOP_RMDIR(dvp, &teardown, NULL, err2);
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else
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VOP_REMOVE(dvp, &teardown, NULL, err2);
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VN_RELE(vp);
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}
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}
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_ACL_FREE(default_acl);
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}
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if (!error) {
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ASSERT(vp);
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ip = LINVFS_GET_IP(vp);
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if (S_ISCHR(mode) || S_ISBLK(mode))
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ip->i_rdev = rdev;
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else if (S_ISDIR(mode))
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validate_fields(ip);
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d_instantiate(dentry, ip);
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validate_fields(dir);
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}
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return -error;
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}
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STATIC int
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linvfs_create(
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struct inode *dir,
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struct dentry *dentry,
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int mode,
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struct nameidata *nd)
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{
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return linvfs_mknod(dir, dentry, mode, 0);
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}
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STATIC int
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linvfs_mkdir(
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struct inode *dir,
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struct dentry *dentry,
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int mode)
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{
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return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0);
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}
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STATIC struct dentry *
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linvfs_lookup(
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struct inode *dir,
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struct dentry *dentry,
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struct nameidata *nd)
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{
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struct vnode *vp = LINVFS_GET_VP(dir), *cvp;
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int error;
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if (dentry->d_name.len >= MAXNAMELEN)
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return ERR_PTR(-ENAMETOOLONG);
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VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error);
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if (error) {
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if (unlikely(error != ENOENT))
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return ERR_PTR(-error);
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d_add(dentry, NULL);
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return NULL;
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}
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return d_splice_alias(LINVFS_GET_IP(cvp), dentry);
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}
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STATIC int
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linvfs_link(
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struct dentry *old_dentry,
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struct inode *dir,
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struct dentry *dentry)
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{
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struct inode *ip; /* inode of guy being linked to */
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vnode_t *tdvp; /* target directory for new name/link */
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vnode_t *vp; /* vp of name being linked */
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int error;
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ip = old_dentry->d_inode; /* inode being linked to */
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if (S_ISDIR(ip->i_mode))
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return -EPERM;
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tdvp = LINVFS_GET_VP(dir);
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vp = LINVFS_GET_VP(ip);
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VOP_LINK(tdvp, vp, dentry, NULL, error);
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if (!error) {
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VMODIFY(tdvp);
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VN_HOLD(vp);
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validate_fields(ip);
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d_instantiate(dentry, ip);
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}
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return -error;
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}
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STATIC int
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linvfs_unlink(
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struct inode *dir,
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struct dentry *dentry)
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{
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struct inode *inode;
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vnode_t *dvp; /* directory containing name to remove */
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int error;
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inode = dentry->d_inode;
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dvp = LINVFS_GET_VP(dir);
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VOP_REMOVE(dvp, dentry, NULL, error);
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if (!error) {
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validate_fields(dir); /* For size only */
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validate_fields(inode);
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}
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return -error;
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}
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STATIC int
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linvfs_symlink(
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struct inode *dir,
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struct dentry *dentry,
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const char *symname)
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{
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struct inode *ip;
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vattr_t va;
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vnode_t *dvp; /* directory containing name of symlink */
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vnode_t *cvp; /* used to lookup symlink to put in dentry */
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int error;
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dvp = LINVFS_GET_VP(dir);
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cvp = NULL;
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memset(&va, 0, sizeof(va));
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va.va_type = VLNK;
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va.va_mode = irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO;
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va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
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error = 0;
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VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error);
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if (!error && cvp) {
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ASSERT(cvp->v_type == VLNK);
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ip = LINVFS_GET_IP(cvp);
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d_instantiate(dentry, ip);
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validate_fields(dir);
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validate_fields(ip); /* size needs update */
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}
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return -error;
|
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}
|
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STATIC int
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linvfs_rmdir(
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struct inode *dir,
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struct dentry *dentry)
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{
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struct inode *inode = dentry->d_inode;
|
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vnode_t *dvp = LINVFS_GET_VP(dir);
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int error;
|
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|
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VOP_RMDIR(dvp, dentry, NULL, error);
|
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if (!error) {
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validate_fields(inode);
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validate_fields(dir);
|
||||
}
|
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return -error;
|
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}
|
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|
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STATIC int
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linvfs_rename(
|
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struct inode *odir,
|
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struct dentry *odentry,
|
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struct inode *ndir,
|
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struct dentry *ndentry)
|
||||
{
|
||||
struct inode *new_inode = ndentry->d_inode;
|
||||
vnode_t *fvp; /* from directory */
|
||||
vnode_t *tvp; /* target directory */
|
||||
int error;
|
||||
|
||||
fvp = LINVFS_GET_VP(odir);
|
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tvp = LINVFS_GET_VP(ndir);
|
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|
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VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error);
|
||||
if (error)
|
||||
return -error;
|
||||
|
||||
if (new_inode)
|
||||
validate_fields(new_inode);
|
||||
|
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validate_fields(odir);
|
||||
if (ndir != odir)
|
||||
validate_fields(ndir);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* careful here - this function can get called recursively, so
|
||||
* we need to be very careful about how much stack we use.
|
||||
* uio is kmalloced for this reason...
|
||||
*/
|
||||
STATIC int
|
||||
linvfs_follow_link(
|
||||
struct dentry *dentry,
|
||||
struct nameidata *nd)
|
||||
{
|
||||
vnode_t *vp;
|
||||
uio_t *uio;
|
||||
iovec_t iov;
|
||||
int error;
|
||||
char *link;
|
||||
|
||||
ASSERT(dentry);
|
||||
ASSERT(nd);
|
||||
|
||||
link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL);
|
||||
if (!link) {
|
||||
nd_set_link(nd, ERR_PTR(-ENOMEM));
|
||||
return 0;
|
||||
}
|
||||
|
||||
uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL);
|
||||
if (!uio) {
|
||||
kfree(link);
|
||||
nd_set_link(nd, ERR_PTR(-ENOMEM));
|
||||
return 0;
|
||||
}
|
||||
|
||||
vp = LINVFS_GET_VP(dentry->d_inode);
|
||||
|
||||
iov.iov_base = link;
|
||||
iov.iov_len = MAXNAMELEN;
|
||||
|
||||
uio->uio_iov = &iov;
|
||||
uio->uio_offset = 0;
|
||||
uio->uio_segflg = UIO_SYSSPACE;
|
||||
uio->uio_resid = MAXNAMELEN;
|
||||
uio->uio_iovcnt = 1;
|
||||
|
||||
VOP_READLINK(vp, uio, 0, NULL, error);
|
||||
if (error) {
|
||||
kfree(link);
|
||||
link = ERR_PTR(-error);
|
||||
} else {
|
||||
link[MAXNAMELEN - uio->uio_resid] = '\0';
|
||||
}
|
||||
kfree(uio);
|
||||
|
||||
nd_set_link(nd, link);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void linvfs_put_link(struct dentry *dentry, struct nameidata *nd)
|
||||
{
|
||||
char *s = nd_get_link(nd);
|
||||
if (!IS_ERR(s))
|
||||
kfree(s);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_XFS_POSIX_ACL
|
||||
STATIC int
|
||||
linvfs_permission(
|
||||
struct inode *inode,
|
||||
int mode,
|
||||
struct nameidata *nd)
|
||||
{
|
||||
vnode_t *vp = LINVFS_GET_VP(inode);
|
||||
int error;
|
||||
|
||||
mode <<= 6; /* convert from linux to vnode access bits */
|
||||
VOP_ACCESS(vp, mode, NULL, error);
|
||||
return -error;
|
||||
}
|
||||
#else
|
||||
#define linvfs_permission NULL
|
||||
#endif
|
||||
|
||||
STATIC int
|
||||
linvfs_getattr(
|
||||
struct vfsmount *mnt,
|
||||
struct dentry *dentry,
|
||||
struct kstat *stat)
|
||||
{
|
||||
struct inode *inode = dentry->d_inode;
|
||||
vnode_t *vp = LINVFS_GET_VP(inode);
|
||||
int error = 0;
|
||||
|
||||
if (unlikely(vp->v_flag & VMODIFIED))
|
||||
error = vn_revalidate(vp);
|
||||
if (!error)
|
||||
generic_fillattr(inode, stat);
|
||||
return 0;
|
||||
}
|
||||
|
||||
STATIC int
|
||||
linvfs_setattr(
|
||||
struct dentry *dentry,
|
||||
struct iattr *attr)
|
||||
{
|
||||
struct inode *inode = dentry->d_inode;
|
||||
unsigned int ia_valid = attr->ia_valid;
|
||||
vnode_t *vp = LINVFS_GET_VP(inode);
|
||||
vattr_t vattr;
|
||||
int flags = 0;
|
||||
int error;
|
||||
|
||||
memset(&vattr, 0, sizeof(vattr_t));
|
||||
if (ia_valid & ATTR_UID) {
|
||||
vattr.va_mask |= XFS_AT_UID;
|
||||
vattr.va_uid = attr->ia_uid;
|
||||
}
|
||||
if (ia_valid & ATTR_GID) {
|
||||
vattr.va_mask |= XFS_AT_GID;
|
||||
vattr.va_gid = attr->ia_gid;
|
||||
}
|
||||
if (ia_valid & ATTR_SIZE) {
|
||||
vattr.va_mask |= XFS_AT_SIZE;
|
||||
vattr.va_size = attr->ia_size;
|
||||
}
|
||||
if (ia_valid & ATTR_ATIME) {
|
||||
vattr.va_mask |= XFS_AT_ATIME;
|
||||
vattr.va_atime = attr->ia_atime;
|
||||
}
|
||||
if (ia_valid & ATTR_MTIME) {
|
||||
vattr.va_mask |= XFS_AT_MTIME;
|
||||
vattr.va_mtime = attr->ia_mtime;
|
||||
}
|
||||
if (ia_valid & ATTR_CTIME) {
|
||||
vattr.va_mask |= XFS_AT_CTIME;
|
||||
vattr.va_ctime = attr->ia_ctime;
|
||||
}
|
||||
if (ia_valid & ATTR_MODE) {
|
||||
vattr.va_mask |= XFS_AT_MODE;
|
||||
vattr.va_mode = attr->ia_mode;
|
||||
if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
|
||||
inode->i_mode &= ~S_ISGID;
|
||||
}
|
||||
|
||||
if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
|
||||
flags |= ATTR_UTIME;
|
||||
#ifdef ATTR_NO_BLOCK
|
||||
if ((ia_valid & ATTR_NO_BLOCK))
|
||||
flags |= ATTR_NONBLOCK;
|
||||
#endif
|
||||
|
||||
VOP_SETATTR(vp, &vattr, flags, NULL, error);
|
||||
if (error)
|
||||
return -error;
|
||||
vn_revalidate(vp);
|
||||
return error;
|
||||
}
|
||||
|
||||
STATIC void
|
||||
linvfs_truncate(
|
||||
struct inode *inode)
|
||||
{
|
||||
block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block);
|
||||
}
|
||||
|
||||
STATIC int
|
||||
linvfs_setxattr(
|
||||
struct dentry *dentry,
|
||||
const char *name,
|
||||
const void *data,
|
||||
size_t size,
|
||||
int flags)
|
||||
{
|
||||
vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
|
||||
char *attr = (char *)name;
|
||||
attrnames_t *namesp;
|
||||
int xflags = 0;
|
||||
int error;
|
||||
|
||||
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
||||
if (!namesp)
|
||||
return -EOPNOTSUPP;
|
||||
attr += namesp->attr_namelen;
|
||||
error = namesp->attr_capable(vp, NULL);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
/* Convert Linux syscall to XFS internal ATTR flags */
|
||||
if (flags & XATTR_CREATE)
|
||||
xflags |= ATTR_CREATE;
|
||||
if (flags & XATTR_REPLACE)
|
||||
xflags |= ATTR_REPLACE;
|
||||
xflags |= namesp->attr_flag;
|
||||
return namesp->attr_set(vp, attr, (void *)data, size, xflags);
|
||||
}
|
||||
|
||||
STATIC ssize_t
|
||||
linvfs_getxattr(
|
||||
struct dentry *dentry,
|
||||
const char *name,
|
||||
void *data,
|
||||
size_t size)
|
||||
{
|
||||
vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
|
||||
char *attr = (char *)name;
|
||||
attrnames_t *namesp;
|
||||
int xflags = 0;
|
||||
ssize_t error;
|
||||
|
||||
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
||||
if (!namesp)
|
||||
return -EOPNOTSUPP;
|
||||
attr += namesp->attr_namelen;
|
||||
error = namesp->attr_capable(vp, NULL);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
/* Convert Linux syscall to XFS internal ATTR flags */
|
||||
if (!size) {
|
||||
xflags |= ATTR_KERNOVAL;
|
||||
data = NULL;
|
||||
}
|
||||
xflags |= namesp->attr_flag;
|
||||
return namesp->attr_get(vp, attr, (void *)data, size, xflags);
|
||||
}
|
||||
|
||||
STATIC ssize_t
|
||||
linvfs_listxattr(
|
||||
struct dentry *dentry,
|
||||
char *data,
|
||||
size_t size)
|
||||
{
|
||||
vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
|
||||
int error, xflags = ATTR_KERNAMELS;
|
||||
ssize_t result;
|
||||
|
||||
if (!size)
|
||||
xflags |= ATTR_KERNOVAL;
|
||||
xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
|
||||
|
||||
error = attr_generic_list(vp, data, size, xflags, &result);
|
||||
if (error < 0)
|
||||
return error;
|
||||
return result;
|
||||
}
|
||||
|
||||
STATIC int
|
||||
linvfs_removexattr(
|
||||
struct dentry *dentry,
|
||||
const char *name)
|
||||
{
|
||||
vnode_t *vp = LINVFS_GET_VP(dentry->d_inode);
|
||||
char *attr = (char *)name;
|
||||
attrnames_t *namesp;
|
||||
int xflags = 0;
|
||||
int error;
|
||||
|
||||
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
||||
if (!namesp)
|
||||
return -EOPNOTSUPP;
|
||||
attr += namesp->attr_namelen;
|
||||
error = namesp->attr_capable(vp, NULL);
|
||||
if (error)
|
||||
return error;
|
||||
xflags |= namesp->attr_flag;
|
||||
return namesp->attr_remove(vp, attr, xflags);
|
||||
}
|
||||
|
||||
|
||||
struct inode_operations linvfs_file_inode_operations = {
|
||||
.permission = linvfs_permission,
|
||||
.truncate = linvfs_truncate,
|
||||
.getattr = linvfs_getattr,
|
||||
.setattr = linvfs_setattr,
|
||||
.setxattr = linvfs_setxattr,
|
||||
.getxattr = linvfs_getxattr,
|
||||
.listxattr = linvfs_listxattr,
|
||||
.removexattr = linvfs_removexattr,
|
||||
};
|
||||
|
||||
struct inode_operations linvfs_dir_inode_operations = {
|
||||
.create = linvfs_create,
|
||||
.lookup = linvfs_lookup,
|
||||
.link = linvfs_link,
|
||||
.unlink = linvfs_unlink,
|
||||
.symlink = linvfs_symlink,
|
||||
.mkdir = linvfs_mkdir,
|
||||
.rmdir = linvfs_rmdir,
|
||||
.mknod = linvfs_mknod,
|
||||
.rename = linvfs_rename,
|
||||
.permission = linvfs_permission,
|
||||
.getattr = linvfs_getattr,
|
||||
.setattr = linvfs_setattr,
|
||||
.setxattr = linvfs_setxattr,
|
||||
.getxattr = linvfs_getxattr,
|
||||
.listxattr = linvfs_listxattr,
|
||||
.removexattr = linvfs_removexattr,
|
||||
};
|
||||
|
||||
struct inode_operations linvfs_symlink_inode_operations = {
|
||||
.readlink = generic_readlink,
|
||||
.follow_link = linvfs_follow_link,
|
||||
.put_link = linvfs_put_link,
|
||||
.permission = linvfs_permission,
|
||||
.getattr = linvfs_getattr,
|
||||
.setattr = linvfs_setattr,
|
||||
.setxattr = linvfs_setxattr,
|
||||
.getxattr = linvfs_getxattr,
|
||||
.listxattr = linvfs_listxattr,
|
||||
.removexattr = linvfs_removexattr,
|
||||
};
|
||||
Reference in New Issue
Block a user