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c1e8d7c6a7
Convert comments that reference mmap_sem to reference mmap_lock instead. [akpm@linux-foundation.org: fix up linux-next leftovers] [akpm@linux-foundation.org: s/lockaphore/lock/, per Vlastimil] [akpm@linux-foundation.org: more linux-next fixups, per Michel] Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Laurent Dufour <ldufour@linux.ibm.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-13-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1396 lines
34 KiB
C
1396 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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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_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_acl.h"
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#include "xfs_quota.h"
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#include "xfs_attr.h"
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#include "xfs_trans.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_symlink.h"
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#include "xfs_dir2.h"
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#include "xfs_iomap.h"
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#include "xfs_error.h"
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#include <linux/posix_acl.h>
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#include <linux/security.h>
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#include <linux/iversion.h>
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#include <linux/fiemap.h>
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/*
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* Directories have different lock order w.r.t. mmap_lock compared to regular
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* files. This is due to readdir potentially triggering page faults on a user
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* buffer inside filldir(), and this happens with the ilock on the directory
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* held. For regular files, the lock order is the other way around - the
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* mmap_lock is taken during the page fault, and then we lock the ilock to do
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* block mapping. Hence we need a different class for the directory ilock so
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* that lockdep can tell them apart.
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*/
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static struct lock_class_key xfs_nondir_ilock_class;
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static struct lock_class_key xfs_dir_ilock_class;
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static int
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xfs_initxattrs(
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struct inode *inode,
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const struct xattr *xattr_array,
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void *fs_info)
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{
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const struct xattr *xattr;
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struct xfs_inode *ip = XFS_I(inode);
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int error = 0;
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for (xattr = xattr_array; xattr->name != NULL; xattr++) {
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struct xfs_da_args args = {
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.dp = ip,
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.attr_filter = XFS_ATTR_SECURE,
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.name = xattr->name,
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.namelen = strlen(xattr->name),
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.value = xattr->value,
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.valuelen = xattr->value_len,
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};
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error = xfs_attr_set(&args);
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if (error < 0)
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break;
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}
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return error;
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}
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/*
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* Hook in SELinux. This is not quite correct yet, what we really need
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* here (as we do for default ACLs) is a mechanism by which creation of
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* these attrs can be journalled at inode creation time (along with the
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* inode, of course, such that log replay can't cause these to be lost).
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*/
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STATIC int
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xfs_init_security(
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struct inode *inode,
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struct inode *dir,
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const struct qstr *qstr)
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{
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return security_inode_init_security(inode, dir, qstr,
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&xfs_initxattrs, NULL);
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}
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static void
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xfs_dentry_to_name(
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struct xfs_name *namep,
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struct dentry *dentry)
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{
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namep->name = dentry->d_name.name;
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namep->len = dentry->d_name.len;
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namep->type = XFS_DIR3_FT_UNKNOWN;
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}
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static int
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xfs_dentry_mode_to_name(
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struct xfs_name *namep,
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struct dentry *dentry,
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int mode)
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{
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namep->name = dentry->d_name.name;
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namep->len = dentry->d_name.len;
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namep->type = xfs_mode_to_ftype(mode);
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if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
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return -EFSCORRUPTED;
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return 0;
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}
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STATIC void
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xfs_cleanup_inode(
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struct inode *dir,
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struct inode *inode,
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struct dentry *dentry)
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{
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struct xfs_name teardown;
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/* Oh, the horror.
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* If we can't add the ACL or we fail in
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* xfs_init_security we must back out.
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* ENOSPC can hit here, among other things.
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*/
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xfs_dentry_to_name(&teardown, dentry);
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xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
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}
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STATIC int
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xfs_generic_create(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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dev_t rdev,
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bool tmpfile) /* unnamed file */
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{
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struct inode *inode;
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struct xfs_inode *ip = NULL;
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struct posix_acl *default_acl, *acl;
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struct xfs_name name;
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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 (S_ISCHR(mode) || S_ISBLK(mode)) {
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if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
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return -EINVAL;
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} else {
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rdev = 0;
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}
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error = posix_acl_create(dir, &mode, &default_acl, &acl);
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if (error)
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return error;
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/* Verify mode is valid also for tmpfile case */
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error = xfs_dentry_mode_to_name(&name, dentry, mode);
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if (unlikely(error))
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goto out_free_acl;
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if (!tmpfile) {
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error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
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} else {
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error = xfs_create_tmpfile(XFS_I(dir), mode, &ip);
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}
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if (unlikely(error))
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goto out_free_acl;
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inode = VFS_I(ip);
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error = xfs_init_security(inode, dir, &dentry->d_name);
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if (unlikely(error))
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goto out_cleanup_inode;
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#ifdef CONFIG_XFS_POSIX_ACL
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if (default_acl) {
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error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
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if (error)
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goto out_cleanup_inode;
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}
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if (acl) {
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error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
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if (error)
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goto out_cleanup_inode;
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}
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#endif
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xfs_setup_iops(ip);
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if (tmpfile) {
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/*
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* The VFS requires that any inode fed to d_tmpfile must have
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* nlink == 1 so that it can decrement the nlink in d_tmpfile.
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* However, we created the temp file with nlink == 0 because
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* we're not allowed to put an inode with nlink > 0 on the
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* unlinked list. Therefore we have to set nlink to 1 so that
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* d_tmpfile can immediately set it back to zero.
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*/
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set_nlink(inode, 1);
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d_tmpfile(dentry, inode);
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} else
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d_instantiate(dentry, inode);
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xfs_finish_inode_setup(ip);
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out_free_acl:
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if (default_acl)
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posix_acl_release(default_acl);
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if (acl)
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posix_acl_release(acl);
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return error;
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out_cleanup_inode:
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xfs_finish_inode_setup(ip);
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if (!tmpfile)
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xfs_cleanup_inode(dir, inode, dentry);
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xfs_irele(ip);
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goto out_free_acl;
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}
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STATIC int
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xfs_vn_mknod(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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dev_t rdev)
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{
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return xfs_generic_create(dir, dentry, mode, rdev, false);
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}
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STATIC int
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xfs_vn_create(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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bool flags)
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{
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return xfs_vn_mknod(dir, dentry, mode, 0);
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}
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STATIC int
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xfs_vn_mkdir(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode)
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{
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return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
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}
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STATIC struct dentry *
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xfs_vn_lookup(
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struct inode *dir,
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struct dentry *dentry,
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unsigned int flags)
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{
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struct inode *inode;
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struct xfs_inode *cip;
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struct xfs_name name;
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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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xfs_dentry_to_name(&name, dentry);
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error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
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if (likely(!error))
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inode = VFS_I(cip);
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else if (likely(error == -ENOENT))
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inode = NULL;
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else
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inode = ERR_PTR(error);
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return d_splice_alias(inode, dentry);
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}
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STATIC struct dentry *
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xfs_vn_ci_lookup(
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struct inode *dir,
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struct dentry *dentry,
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unsigned int flags)
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{
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struct xfs_inode *ip;
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struct xfs_name xname;
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struct xfs_name ci_name;
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struct qstr dname;
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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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xfs_dentry_to_name(&xname, dentry);
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error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
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if (unlikely(error)) {
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if (unlikely(error != -ENOENT))
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return ERR_PTR(error);
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/*
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* call d_add(dentry, NULL) here when d_drop_negative_children
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* is called in xfs_vn_mknod (ie. allow negative dentries
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* with CI filesystems).
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*/
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return NULL;
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}
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/* if exact match, just splice and exit */
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if (!ci_name.name)
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return d_splice_alias(VFS_I(ip), dentry);
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/* else case-insensitive match... */
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dname.name = ci_name.name;
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dname.len = ci_name.len;
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dentry = d_add_ci(dentry, VFS_I(ip), &dname);
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kmem_free(ci_name.name);
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return dentry;
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}
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STATIC int
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xfs_vn_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 *inode = d_inode(old_dentry);
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struct xfs_name name;
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int error;
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error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
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if (unlikely(error))
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return error;
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error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
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if (unlikely(error))
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return error;
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ihold(inode);
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d_instantiate(dentry, inode);
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return 0;
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}
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STATIC int
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xfs_vn_unlink(
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struct inode *dir,
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struct dentry *dentry)
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{
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struct xfs_name name;
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int error;
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xfs_dentry_to_name(&name, dentry);
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error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
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if (error)
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return error;
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/*
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* With unlink, the VFS makes the dentry "negative": no inode,
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* but still hashed. This is incompatible with case-insensitive
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* mode, so invalidate (unhash) the dentry in CI-mode.
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*/
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if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
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d_invalidate(dentry);
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return 0;
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}
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STATIC int
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xfs_vn_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 *inode;
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struct xfs_inode *cip = NULL;
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struct xfs_name name;
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int error;
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umode_t mode;
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mode = S_IFLNK |
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(irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
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error = xfs_dentry_mode_to_name(&name, dentry, mode);
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if (unlikely(error))
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goto out;
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error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
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if (unlikely(error))
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goto out;
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inode = VFS_I(cip);
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error = xfs_init_security(inode, dir, &dentry->d_name);
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if (unlikely(error))
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goto out_cleanup_inode;
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xfs_setup_iops(cip);
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d_instantiate(dentry, inode);
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xfs_finish_inode_setup(cip);
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return 0;
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out_cleanup_inode:
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xfs_finish_inode_setup(cip);
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xfs_cleanup_inode(dir, inode, dentry);
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xfs_irele(cip);
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out:
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return error;
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}
|
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|
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STATIC int
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xfs_vn_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,
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unsigned int flags)
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{
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struct inode *new_inode = d_inode(ndentry);
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int omode = 0;
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int error;
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struct xfs_name oname;
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struct xfs_name nname;
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|
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if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
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return -EINVAL;
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|
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/* if we are exchanging files, we need to set i_mode of both files */
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if (flags & RENAME_EXCHANGE)
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omode = d_inode(ndentry)->i_mode;
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error = xfs_dentry_mode_to_name(&oname, odentry, omode);
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if (omode && unlikely(error))
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return error;
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error = xfs_dentry_mode_to_name(&nname, ndentry,
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d_inode(odentry)->i_mode);
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if (unlikely(error))
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return error;
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|
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return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
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XFS_I(ndir), &nname,
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new_inode ? XFS_I(new_inode) : NULL, flags);
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}
|
|
|
|
/*
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|
* 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...
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*/
|
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STATIC const char *
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xfs_vn_get_link(
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struct dentry *dentry,
|
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struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
char *link;
|
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int error = -ENOMEM;
|
|
|
|
if (!dentry)
|
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return ERR_PTR(-ECHILD);
|
|
|
|
link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
|
|
if (!link)
|
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goto out_err;
|
|
|
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error = xfs_readlink(XFS_I(d_inode(dentry)), link);
|
|
if (unlikely(error))
|
|
goto out_kfree;
|
|
|
|
set_delayed_call(done, kfree_link, link);
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|
return link;
|
|
|
|
out_kfree:
|
|
kfree(link);
|
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out_err:
|
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return ERR_PTR(error);
|
|
}
|
|
|
|
STATIC const char *
|
|
xfs_vn_get_link_inline(
|
|
struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
char *link;
|
|
|
|
ASSERT(ip->i_df.if_flags & XFS_IFINLINE);
|
|
|
|
/*
|
|
* The VFS crashes on a NULL pointer, so return -EFSCORRUPTED if
|
|
* if_data is junk.
|
|
*/
|
|
link = ip->i_df.if_u1.if_data;
|
|
if (XFS_IS_CORRUPT(ip->i_mount, !link))
|
|
return ERR_PTR(-EFSCORRUPTED);
|
|
return link;
|
|
}
|
|
|
|
static uint32_t
|
|
xfs_stat_blksize(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
/*
|
|
* If the file blocks are being allocated from a realtime volume, then
|
|
* always return the realtime extent size.
|
|
*/
|
|
if (XFS_IS_REALTIME_INODE(ip))
|
|
return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
|
|
|
|
/*
|
|
* Allow large block sizes to be reported to userspace programs if the
|
|
* "largeio" mount option is used.
|
|
*
|
|
* If compatibility mode is specified, simply return the basic unit of
|
|
* caching so that we don't get inefficient read/modify/write I/O from
|
|
* user apps. Otherwise....
|
|
*
|
|
* If the underlying volume is a stripe, then return the stripe width in
|
|
* bytes as the recommended I/O size. It is not a stripe and we've set a
|
|
* default buffered I/O size, return that, otherwise return the compat
|
|
* default.
|
|
*/
|
|
if (mp->m_flags & XFS_MOUNT_LARGEIO) {
|
|
if (mp->m_swidth)
|
|
return mp->m_swidth << mp->m_sb.sb_blocklog;
|
|
if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
|
|
return 1U << mp->m_allocsize_log;
|
|
}
|
|
|
|
return PAGE_SIZE;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_getattr(
|
|
const struct path *path,
|
|
struct kstat *stat,
|
|
u32 request_mask,
|
|
unsigned int query_flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
trace_xfs_getattr(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
stat->size = XFS_ISIZE(ip);
|
|
stat->dev = inode->i_sb->s_dev;
|
|
stat->mode = inode->i_mode;
|
|
stat->nlink = inode->i_nlink;
|
|
stat->uid = inode->i_uid;
|
|
stat->gid = inode->i_gid;
|
|
stat->ino = ip->i_ino;
|
|
stat->atime = inode->i_atime;
|
|
stat->mtime = inode->i_mtime;
|
|
stat->ctime = inode->i_ctime;
|
|
stat->blocks =
|
|
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
|
|
|
|
if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
|
|
if (request_mask & STATX_BTIME) {
|
|
stat->result_mask |= STATX_BTIME;
|
|
stat->btime = ip->i_d.di_crtime;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Note: If you add another clause to set an attribute flag, please
|
|
* update attributes_mask below.
|
|
*/
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
|
|
stat->attributes |= STATX_ATTR_IMMUTABLE;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
|
|
stat->attributes |= STATX_ATTR_APPEND;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
|
|
stat->attributes |= STATX_ATTR_NODUMP;
|
|
|
|
stat->attributes_mask |= (STATX_ATTR_IMMUTABLE |
|
|
STATX_ATTR_APPEND |
|
|
STATX_ATTR_NODUMP);
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
stat->blksize = BLKDEV_IOSIZE;
|
|
stat->rdev = inode->i_rdev;
|
|
break;
|
|
default:
|
|
stat->blksize = xfs_stat_blksize(ip);
|
|
stat->rdev = 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
xfs_setattr_mode(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
umode_t mode = iattr->ia_mode;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
inode->i_mode &= S_IFMT;
|
|
inode->i_mode |= mode & ~S_IFMT;
|
|
}
|
|
|
|
void
|
|
xfs_setattr_time(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
if (iattr->ia_valid & ATTR_ATIME)
|
|
inode->i_atime = iattr->ia_atime;
|
|
if (iattr->ia_valid & ATTR_CTIME)
|
|
inode->i_ctime = iattr->ia_ctime;
|
|
if (iattr->ia_valid & ATTR_MTIME)
|
|
inode->i_mtime = iattr->ia_mtime;
|
|
}
|
|
|
|
static int
|
|
xfs_vn_change_ok(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
return setattr_prepare(dentry, iattr);
|
|
}
|
|
|
|
/*
|
|
* Set non-size attributes of an inode.
|
|
*
|
|
* Caution: The caller of this function is responsible for calling
|
|
* setattr_prepare() or otherwise verifying the change is fine.
|
|
*/
|
|
int
|
|
xfs_setattr_nonsize(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr,
|
|
int flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
int mask = iattr->ia_valid;
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
|
|
kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
|
|
struct xfs_dquot *udqp = NULL, *gdqp = NULL;
|
|
struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
|
|
|
|
ASSERT((mask & ATTR_SIZE) == 0);
|
|
|
|
/*
|
|
* If disk quotas is on, we make sure that the dquots do exist on disk,
|
|
* before we start any other transactions. Trying to do this later
|
|
* is messy. We don't care to take a readlock to look at the ids
|
|
* in inode here, because we can't hold it across the trans_reserve.
|
|
* If the IDs do change before we take the ilock, we're covered
|
|
* because the i_*dquot fields will get updated anyway.
|
|
*/
|
|
if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
|
|
uint qflags = 0;
|
|
|
|
if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
|
|
uid = iattr->ia_uid;
|
|
qflags |= XFS_QMOPT_UQUOTA;
|
|
} else {
|
|
uid = inode->i_uid;
|
|
}
|
|
if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
|
|
gid = iattr->ia_gid;
|
|
qflags |= XFS_QMOPT_GQUOTA;
|
|
} else {
|
|
gid = inode->i_gid;
|
|
}
|
|
|
|
/*
|
|
* We take a reference when we initialize udqp and gdqp,
|
|
* so it is important that we never blindly double trip on
|
|
* the same variable. See xfs_create() for an example.
|
|
*/
|
|
ASSERT(udqp == NULL);
|
|
ASSERT(gdqp == NULL);
|
|
error = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_d.di_projid,
|
|
qflags, &udqp, &gdqp, NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
|
|
if (error)
|
|
goto out_dqrele;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
*/
|
|
if (mask & (ATTR_UID|ATTR_GID)) {
|
|
/*
|
|
* These IDs could have changed since we last looked at them.
|
|
* But, we're assured that if the ownership did change
|
|
* while we didn't have the inode locked, inode's dquot(s)
|
|
* would have changed also.
|
|
*/
|
|
iuid = inode->i_uid;
|
|
igid = inode->i_gid;
|
|
gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
|
|
uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
|
|
|
|
/*
|
|
* Do a quota reservation only if uid/gid is actually
|
|
* going to change.
|
|
*/
|
|
if (XFS_IS_QUOTA_RUNNING(mp) &&
|
|
((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
|
|
(XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
|
|
ASSERT(tp);
|
|
error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
|
|
NULL, capable(CAP_FOWNER) ?
|
|
XFS_QMOPT_FORCE_RES : 0);
|
|
if (error) /* out of quota */
|
|
goto out_cancel;
|
|
}
|
|
|
|
/*
|
|
* CAP_FSETID overrides the following restrictions:
|
|
*
|
|
* The set-user-ID and set-group-ID bits of a file will be
|
|
* cleared upon successful return from chown()
|
|
*/
|
|
if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
|
|
!capable(CAP_FSETID))
|
|
inode->i_mode &= ~(S_ISUID|S_ISGID);
|
|
|
|
/*
|
|
* Change the ownerships and register quota modifications
|
|
* in the transaction.
|
|
*/
|
|
if (!uid_eq(iuid, uid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
|
|
ASSERT(mask & ATTR_UID);
|
|
ASSERT(udqp);
|
|
olddquot1 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_udquot, udqp);
|
|
}
|
|
inode->i_uid = uid;
|
|
}
|
|
if (!gid_eq(igid, gid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
|
|
ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
|
|
!XFS_IS_PQUOTA_ON(mp));
|
|
ASSERT(mask & ATTR_GID);
|
|
ASSERT(gdqp);
|
|
olddquot2 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_gdquot, gdqp);
|
|
}
|
|
inode->i_gid = gid;
|
|
}
|
|
}
|
|
|
|
if (mask & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(mp, xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
error = xfs_trans_commit(tp);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Release any dquot(s) the inode had kept before chown.
|
|
*/
|
|
xfs_qm_dqrele(olddquot1);
|
|
xfs_qm_dqrele(olddquot2);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* XXX(hch): Updating the ACL entries is not atomic vs the i_mode
|
|
* update. We could avoid this with linked transactions
|
|
* and passing down the transaction pointer all the way
|
|
* to attr_set. No previous user of the generic
|
|
* Posix ACL code seems to care about this issue either.
|
|
*/
|
|
if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
|
|
error = posix_acl_chmod(inode, inode->i_mode);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_cancel:
|
|
xfs_trans_cancel(tp);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
out_dqrele:
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_vn_setattr_nonsize(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(d_inode(dentry));
|
|
int error;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
error = xfs_vn_change_ok(dentry, iattr);
|
|
if (error)
|
|
return error;
|
|
return xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
/*
|
|
* Truncate file. Must have write permission and not be a directory.
|
|
*
|
|
* Caution: The caller of this function is responsible for calling
|
|
* setattr_prepare() or otherwise verifying the change is fine.
|
|
*/
|
|
STATIC int
|
|
xfs_setattr_size(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
xfs_off_t oldsize, newsize;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
uint lock_flags = 0;
|
|
bool did_zeroing = false;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
|
|
ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
|
|
ASSERT(S_ISREG(inode->i_mode));
|
|
ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
|
|
ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
|
|
|
|
oldsize = inode->i_size;
|
|
newsize = iattr->ia_size;
|
|
|
|
/*
|
|
* Short circuit the truncate case for zero length files.
|
|
*/
|
|
if (newsize == 0 && oldsize == 0 && ip->i_df.if_nextents == 0) {
|
|
if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
|
|
return 0;
|
|
|
|
/*
|
|
* Use the regular setattr path to update the timestamps.
|
|
*/
|
|
iattr->ia_valid &= ~ATTR_SIZE;
|
|
return xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the dquots are attached to the inode.
|
|
*/
|
|
error = xfs_qm_dqattach(ip);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Wait for all direct I/O to complete.
|
|
*/
|
|
inode_dio_wait(inode);
|
|
|
|
/*
|
|
* File data changes must be complete before we start the transaction to
|
|
* modify the inode. This needs to be done before joining the inode to
|
|
* the transaction because the inode cannot be unlocked once it is a
|
|
* part of the transaction.
|
|
*
|
|
* Start with zeroing any data beyond EOF that we may expose on file
|
|
* extension, or zeroing out the rest of the block on a downward
|
|
* truncate.
|
|
*/
|
|
if (newsize > oldsize) {
|
|
trace_xfs_zero_eof(ip, oldsize, newsize - oldsize);
|
|
error = iomap_zero_range(inode, oldsize, newsize - oldsize,
|
|
&did_zeroing, &xfs_buffered_write_iomap_ops);
|
|
} else {
|
|
error = iomap_truncate_page(inode, newsize, &did_zeroing,
|
|
&xfs_buffered_write_iomap_ops);
|
|
}
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* We've already locked out new page faults, so now we can safely remove
|
|
* pages from the page cache knowing they won't get refaulted until we
|
|
* drop the XFS_MMAP_EXCL lock after the extent manipulations are
|
|
* complete. The truncate_setsize() call also cleans partial EOF page
|
|
* PTEs on extending truncates and hence ensures sub-page block size
|
|
* filesystems are correctly handled, too.
|
|
*
|
|
* We have to do all the page cache truncate work outside the
|
|
* transaction context as the "lock" order is page lock->log space
|
|
* reservation as defined by extent allocation in the writeback path.
|
|
* Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
|
|
* having already truncated the in-memory version of the file (i.e. made
|
|
* user visible changes). There's not much we can do about this, except
|
|
* to hope that the caller sees ENOMEM and retries the truncate
|
|
* operation.
|
|
*
|
|
* And we update in-core i_size and truncate page cache beyond newsize
|
|
* before writeback the [di_size, newsize] range, so we're guaranteed
|
|
* not to write stale data past the new EOF on truncate down.
|
|
*/
|
|
truncate_setsize(inode, newsize);
|
|
|
|
/*
|
|
* We are going to log the inode size change in this transaction so
|
|
* any previous writes that are beyond the on disk EOF and the new
|
|
* EOF that have not been written out need to be written here. If we
|
|
* do not write the data out, we expose ourselves to the null files
|
|
* problem. Note that this includes any block zeroing we did above;
|
|
* otherwise those blocks may not be zeroed after a crash.
|
|
*/
|
|
if (did_zeroing ||
|
|
(newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
|
|
error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
|
|
ip->i_d.di_size, newsize - 1);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
|
|
lock_flags |= XFS_ILOCK_EXCL;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Only change the c/mtime if we are changing the size or we are
|
|
* explicitly asked to change it. This handles the semantic difference
|
|
* between truncate() and ftruncate() as implemented in the VFS.
|
|
*
|
|
* The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
|
|
* special case where we need to update the times despite not having
|
|
* these flags set. For all other operations the VFS set these flags
|
|
* explicitly if it wants a timestamp update.
|
|
*/
|
|
if (newsize != oldsize &&
|
|
!(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
|
|
iattr->ia_ctime = iattr->ia_mtime =
|
|
current_time(inode);
|
|
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
|
|
}
|
|
|
|
/*
|
|
* The first thing we do is set the size to new_size permanently on
|
|
* disk. This way we don't have to worry about anyone ever being able
|
|
* to look at the data being freed even in the face of a crash.
|
|
* What we're getting around here is the case where we free a block, it
|
|
* is allocated to another file, it is written to, and then we crash.
|
|
* If the new data gets written to the file but the log buffers
|
|
* containing the free and reallocation don't, then we'd end up with
|
|
* garbage in the blocks being freed. As long as we make the new size
|
|
* permanent before actually freeing any blocks it doesn't matter if
|
|
* they get written to.
|
|
*/
|
|
ip->i_d.di_size = newsize;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
if (newsize <= oldsize) {
|
|
error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
|
|
/*
|
|
* Truncated "down", so we're removing references to old data
|
|
* here - if we delay flushing for a long time, we expose
|
|
* ourselves unduly to the notorious NULL files problem. So,
|
|
* we mark this inode and flush it when the file is closed,
|
|
* and do not wait the usual (long) time for writeout.
|
|
*/
|
|
xfs_iflags_set(ip, XFS_ITRUNCATED);
|
|
|
|
/* A truncate down always removes post-EOF blocks. */
|
|
xfs_inode_clear_eofblocks_tag(ip);
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(mp, xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
error = xfs_trans_commit(tp);
|
|
out_unlock:
|
|
if (lock_flags)
|
|
xfs_iunlock(ip, lock_flags);
|
|
return error;
|
|
|
|
out_trans_cancel:
|
|
xfs_trans_cancel(tp);
|
|
goto out_unlock;
|
|
}
|
|
|
|
int
|
|
xfs_vn_setattr_size(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(d_inode(dentry));
|
|
int error;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
error = xfs_vn_change_ok(dentry, iattr);
|
|
if (error)
|
|
return error;
|
|
return xfs_setattr_size(ip, iattr);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_setattr(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
int error;
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE) {
|
|
struct inode *inode = d_inode(dentry);
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
uint iolock;
|
|
|
|
xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
|
|
iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
|
|
|
|
error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
|
|
if (error) {
|
|
xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
|
|
return error;
|
|
}
|
|
|
|
error = xfs_vn_setattr_size(dentry, iattr);
|
|
xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
|
|
} else {
|
|
error = xfs_vn_setattr_nonsize(dentry, iattr);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_update_time(
|
|
struct inode *inode,
|
|
struct timespec64 *now,
|
|
int flags)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
int log_flags = XFS_ILOG_TIMESTAMP;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
|
|
trace_xfs_update_time(ip);
|
|
|
|
if (inode->i_sb->s_flags & SB_LAZYTIME) {
|
|
if (!((flags & S_VERSION) &&
|
|
inode_maybe_inc_iversion(inode, false)))
|
|
return generic_update_time(inode, now, flags);
|
|
|
|
/* Capture the iversion update that just occurred */
|
|
log_flags |= XFS_ILOG_CORE;
|
|
}
|
|
|
|
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
|
|
if (error)
|
|
return error;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
if (flags & S_CTIME)
|
|
inode->i_ctime = *now;
|
|
if (flags & S_MTIME)
|
|
inode->i_mtime = *now;
|
|
if (flags & S_ATIME)
|
|
inode->i_atime = *now;
|
|
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, log_flags);
|
|
return xfs_trans_commit(tp);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_fiemap(
|
|
struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo,
|
|
u64 start,
|
|
u64 length)
|
|
{
|
|
int error;
|
|
|
|
xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
|
|
if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
|
|
fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
|
|
error = iomap_fiemap(inode, fieinfo, start, length,
|
|
&xfs_xattr_iomap_ops);
|
|
} else {
|
|
error = iomap_fiemap(inode, fieinfo, start, length,
|
|
&xfs_read_iomap_ops);
|
|
}
|
|
xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_tmpfile(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode)
|
|
{
|
|
return xfs_generic_create(dir, dentry, mode, 0, true);
|
|
}
|
|
|
|
static const struct inode_operations xfs_inode_operations = {
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.fiemap = xfs_vn_fiemap,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_ci_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_ci_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_symlink_inode_operations = {
|
|
.get_link = xfs_vn_get_link,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
static const struct inode_operations xfs_inline_symlink_inode_operations = {
|
|
.get_link = xfs_vn_get_link_inline,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
/* Figure out if this file actually supports DAX. */
|
|
static bool
|
|
xfs_inode_supports_dax(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
/* Only supported on regular files. */
|
|
if (!S_ISREG(VFS_I(ip)->i_mode))
|
|
return false;
|
|
|
|
/* Only supported on non-reflinked files. */
|
|
if (xfs_is_reflink_inode(ip))
|
|
return false;
|
|
|
|
/* Block size must match page size */
|
|
if (mp->m_sb.sb_blocksize != PAGE_SIZE)
|
|
return false;
|
|
|
|
/* Device has to support DAX too. */
|
|
return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
|
|
}
|
|
|
|
static bool
|
|
xfs_inode_should_enable_dax(
|
|
struct xfs_inode *ip)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_FS_DAX))
|
|
return false;
|
|
if (ip->i_mount->m_flags & XFS_MOUNT_DAX_NEVER)
|
|
return false;
|
|
if (!xfs_inode_supports_dax(ip))
|
|
return false;
|
|
if (ip->i_mount->m_flags & XFS_MOUNT_DAX_ALWAYS)
|
|
return true;
|
|
if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void
|
|
xfs_diflags_to_iflags(
|
|
struct xfs_inode *ip,
|
|
bool init)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
unsigned int xflags = xfs_ip2xflags(ip);
|
|
unsigned int flags = 0;
|
|
|
|
ASSERT(!(IS_DAX(inode) && init));
|
|
|
|
if (xflags & FS_XFLAG_IMMUTABLE)
|
|
flags |= S_IMMUTABLE;
|
|
if (xflags & FS_XFLAG_APPEND)
|
|
flags |= S_APPEND;
|
|
if (xflags & FS_XFLAG_SYNC)
|
|
flags |= S_SYNC;
|
|
if (xflags & FS_XFLAG_NOATIME)
|
|
flags |= S_NOATIME;
|
|
if (init && xfs_inode_should_enable_dax(ip))
|
|
flags |= S_DAX;
|
|
|
|
/*
|
|
* S_DAX can only be set during inode initialization and is never set by
|
|
* the VFS, so we cannot mask off S_DAX in i_flags.
|
|
*/
|
|
inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME);
|
|
inode->i_flags |= flags;
|
|
}
|
|
|
|
/*
|
|
* Initialize the Linux inode.
|
|
*
|
|
* When reading existing inodes from disk this is called directly from xfs_iget,
|
|
* when creating a new inode it is called from xfs_ialloc after setting up the
|
|
* inode. These callers have different criteria for clearing XFS_INEW, so leave
|
|
* it up to the caller to deal with unlocking the inode appropriately.
|
|
*/
|
|
void
|
|
xfs_setup_inode(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_vnode;
|
|
gfp_t gfp_mask;
|
|
|
|
inode->i_ino = ip->i_ino;
|
|
inode->i_state = I_NEW;
|
|
|
|
inode_sb_list_add(inode);
|
|
/* make the inode look hashed for the writeback code */
|
|
inode_fake_hash(inode);
|
|
|
|
i_size_write(inode, ip->i_d.di_size);
|
|
xfs_diflags_to_iflags(ip, true);
|
|
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
/*
|
|
* We set the i_rwsem class here to avoid potential races with
|
|
* lockdep_annotate_inode_mutex_key() reinitialising the lock
|
|
* after a filehandle lookup has already found the inode in
|
|
* cache before it has been unlocked via unlock_new_inode().
|
|
*/
|
|
lockdep_set_class(&inode->i_rwsem,
|
|
&inode->i_sb->s_type->i_mutex_dir_key);
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
|
|
} else {
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
|
|
}
|
|
|
|
/*
|
|
* Ensure all page cache allocations are done from GFP_NOFS context to
|
|
* prevent direct reclaim recursion back into the filesystem and blowing
|
|
* stacks or deadlocking.
|
|
*/
|
|
gfp_mask = mapping_gfp_mask(inode->i_mapping);
|
|
mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
|
|
|
|
/*
|
|
* If there is no attribute fork no ACL can exist on this inode,
|
|
* and it can't have any file capabilities attached to it either.
|
|
*/
|
|
if (!XFS_IFORK_Q(ip)) {
|
|
inode_has_no_xattr(inode);
|
|
cache_no_acl(inode);
|
|
}
|
|
}
|
|
|
|
void
|
|
xfs_setup_iops(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_vnode;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_op = &xfs_inode_operations;
|
|
inode->i_fop = &xfs_file_operations;
|
|
if (IS_DAX(inode))
|
|
inode->i_mapping->a_ops = &xfs_dax_aops;
|
|
else
|
|
inode->i_mapping->a_ops = &xfs_address_space_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
|
|
inode->i_op = &xfs_dir_ci_inode_operations;
|
|
else
|
|
inode->i_op = &xfs_dir_inode_operations;
|
|
inode->i_fop = &xfs_dir_file_operations;
|
|
break;
|
|
case S_IFLNK:
|
|
if (ip->i_df.if_flags & XFS_IFINLINE)
|
|
inode->i_op = &xfs_inline_symlink_inode_operations;
|
|
else
|
|
inode->i_op = &xfs_symlink_inode_operations;
|
|
break;
|
|
default:
|
|
inode->i_op = &xfs_inode_operations;
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
break;
|
|
}
|
|
}
|