^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2000-2005 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include "xfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "xfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "xfs_shared.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "xfs_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "xfs_log_format.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "xfs_trans_resv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "xfs_mount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "xfs_inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "xfs_acl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "xfs_quota.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "xfs_attr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "xfs_trans.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "xfs_trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "xfs_icache.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "xfs_symlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "xfs_dir2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "xfs_iomap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "xfs_error.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/posix_acl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/iversion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/fiemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Directories have different lock order w.r.t. mmap_lock compared to regular
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * files. This is due to readdir potentially triggering page faults on a user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * buffer inside filldir(), and this happens with the ilock on the directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * held. For regular files, the lock order is the other way around - the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * mmap_lock is taken during the page fault, and then we lock the ilock to do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * block mapping. Hence we need a different class for the directory ilock so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * that lockdep can tell them apart.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static struct lock_class_key xfs_nondir_ilock_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static struct lock_class_key xfs_dir_ilock_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) xfs_initxattrs(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) const struct xattr *xattr_array,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) void *fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) const struct xattr *xattr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct xfs_inode *ip = XFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) for (xattr = xattr_array; xattr->name != NULL; xattr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct xfs_da_args args = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .dp = ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .attr_filter = XFS_ATTR_SECURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .name = xattr->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .namelen = strlen(xattr->name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .value = xattr->value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .valuelen = xattr->value_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) error = xfs_attr_set(&args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Hook in SELinux. This is not quite correct yet, what we really need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * here (as we do for default ACLs) is a mechanism by which creation of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * these attrs can be journalled at inode creation time (along with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * inode, of course, such that log replay can't cause these to be lost).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) xfs_init_security(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) const struct qstr *qstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return security_inode_init_security(inode, dir, qstr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) &xfs_initxattrs, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) xfs_dentry_to_name(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct xfs_name *namep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) namep->name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) namep->len = dentry->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) namep->type = XFS_DIR3_FT_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) xfs_dentry_mode_to_name(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct xfs_name *namep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) namep->name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) namep->len = dentry->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) namep->type = xfs_mode_to_ftype(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (unlikely(namep->type == XFS_DIR3_FT_UNKNOWN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return -EFSCORRUPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) STATIC void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) xfs_cleanup_inode(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct xfs_name teardown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* Oh, the horror.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * If we can't add the ACL or we fail in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * xfs_init_security we must back out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * ENOSPC can hit here, among other things.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) xfs_dentry_to_name(&teardown, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) xfs_generic_create(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dev_t rdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) bool tmpfile) /* unnamed file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct xfs_inode *ip = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct posix_acl *default_acl, *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct xfs_name name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * Irix uses Missed'em'V split, but doesn't want to see
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * the upper 5 bits of (14bit) major.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (S_ISCHR(mode) || S_ISBLK(mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) rdev = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) error = posix_acl_create(dir, &mode, &default_acl, &acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /* Verify mode is valid also for tmpfile case */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) error = xfs_dentry_mode_to_name(&name, dentry, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) goto out_free_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!tmpfile) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) error = xfs_create_tmpfile(XFS_I(dir), mode, &ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) goto out_free_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) error = xfs_init_security(inode, dir, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) goto out_cleanup_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #ifdef CONFIG_XFS_POSIX_ACL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (default_acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) error = __xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) goto out_cleanup_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) error = __xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) goto out_cleanup_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) xfs_setup_iops(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (tmpfile) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * The VFS requires that any inode fed to d_tmpfile must have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * nlink == 1 so that it can decrement the nlink in d_tmpfile.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * However, we created the temp file with nlink == 0 because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * we're not allowed to put an inode with nlink > 0 on the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * unlinked list. Therefore we have to set nlink to 1 so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * d_tmpfile can immediately set it back to zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) set_nlink(inode, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) d_tmpfile(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) xfs_finish_inode_setup(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) out_free_acl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (default_acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) posix_acl_release(default_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) posix_acl_release(acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) out_cleanup_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) xfs_finish_inode_setup(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (!tmpfile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) xfs_cleanup_inode(dir, inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) xfs_irele(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto out_free_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) xfs_vn_mknod(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return xfs_generic_create(dir, dentry, mode, rdev, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) xfs_vn_create(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) bool flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return xfs_generic_create(dir, dentry, mode, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) xfs_vn_mkdir(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return xfs_generic_create(dir, dentry, mode | S_IFDIR, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) STATIC struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) xfs_vn_lookup(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct xfs_inode *cip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct xfs_name name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (dentry->d_name.len >= MAXNAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) xfs_dentry_to_name(&name, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (likely(!error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) inode = VFS_I(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) else if (likely(error == -ENOENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) inode = ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) STATIC struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) xfs_vn_ci_lookup(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) struct xfs_inode *ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct xfs_name xname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct xfs_name ci_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct qstr dname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (dentry->d_name.len >= MAXNAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) xfs_dentry_to_name(&xname, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (unlikely(error)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (unlikely(error != -ENOENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * call d_add(dentry, NULL) here when d_drop_negative_children
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * is called in xfs_vn_mknod (ie. allow negative dentries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * with CI filesystems).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* if exact match, just splice and exit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (!ci_name.name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return d_splice_alias(VFS_I(ip), dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /* else case-insensitive match... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) dname.name = ci_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dname.len = ci_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) dentry = d_add_ci(dentry, VFS_I(ip), &dname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) kmem_free(ci_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) xfs_vn_link(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct inode *inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) struct xfs_name name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) error = xfs_dentry_mode_to_name(&name, dentry, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ihold(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) xfs_vn_unlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct xfs_name name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) xfs_dentry_to_name(&name, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) * With unlink, the VFS makes the dentry "negative": no inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * but still hashed. This is incompatible with case-insensitive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * mode, so invalidate (unhash) the dentry in CI-mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) d_invalidate(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) xfs_vn_symlink(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) const char *symname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct xfs_inode *cip = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct xfs_name name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) umode_t mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) mode = S_IFLNK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) error = xfs_dentry_mode_to_name(&name, dentry, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) inode = VFS_I(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) error = xfs_init_security(inode, dir, &dentry->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) goto out_cleanup_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) xfs_setup_iops(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) xfs_finish_inode_setup(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) out_cleanup_inode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) xfs_finish_inode_setup(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) xfs_cleanup_inode(dir, inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) xfs_irele(cip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) xfs_vn_rename(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct inode *odir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct dentry *odentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct inode *ndir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct dentry *ndentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) struct inode *new_inode = d_inode(ndentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) int omode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct xfs_name oname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct xfs_name nname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* if we are exchanging files, we need to set i_mode of both files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) if (flags & RENAME_EXCHANGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) omode = d_inode(ndentry)->i_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) error = xfs_dentry_mode_to_name(&oname, odentry, omode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (omode && unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) error = xfs_dentry_mode_to_name(&nname, ndentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) d_inode(odentry)->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) XFS_I(ndir), &nname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) new_inode ? XFS_I(new_inode) : NULL, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * careful here - this function can get called recursively, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) * we need to be very careful about how much stack we use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) * uio is kmalloced for this reason...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) STATIC const char *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) xfs_vn_get_link(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct delayed_call *done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) char *link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) int error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (!dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return ERR_PTR(-ECHILD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) link = kmalloc(XFS_SYMLINK_MAXLEN+1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (!link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) error = xfs_readlink(XFS_I(d_inode(dentry)), link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (unlikely(error))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) goto out_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) set_delayed_call(done, kfree_link, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) out_kfree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) kfree(link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) return ERR_PTR(error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) STATIC const char *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) xfs_vn_get_link_inline(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct delayed_call *done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct xfs_inode *ip = XFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) char *link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) ASSERT(ip->i_df.if_flags & XFS_IFINLINE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * if_data is junk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) link = ip->i_df.if_u1.if_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (XFS_IS_CORRUPT(ip->i_mount, !link))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) return ERR_PTR(-EFSCORRUPTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static uint32_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) xfs_stat_blksize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * If the file blocks are being allocated from a realtime volume, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * always return the realtime extent size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) if (XFS_IS_REALTIME_INODE(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) return xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * Allow large block sizes to be reported to userspace programs if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * "largeio" mount option is used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * If compatibility mode is specified, simply return the basic unit of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * caching so that we don't get inefficient read/modify/write I/O from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * user apps. Otherwise....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * If the underlying volume is a stripe, then return the stripe width in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * bytes as the recommended I/O size. It is not a stripe and we've set a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * default buffered I/O size, return that, otherwise return the compat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (mp->m_flags & XFS_MOUNT_LARGEIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (mp->m_swidth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return mp->m_swidth << mp->m_sb.sb_blocklog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return 1U << mp->m_allocsize_log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) return PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) xfs_vn_getattr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) const struct path *path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct kstat *stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) u32 request_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) unsigned int query_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct inode *inode = d_inode(path->dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct xfs_inode *ip = XFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) trace_xfs_getattr(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (XFS_FORCED_SHUTDOWN(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) stat->size = XFS_ISIZE(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) stat->dev = inode->i_sb->s_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) stat->mode = inode->i_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) stat->nlink = inode->i_nlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) stat->uid = inode->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) stat->gid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) stat->ino = ip->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) stat->atime = inode->i_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) stat->mtime = inode->i_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) stat->ctime = inode->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) stat->blocks =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (request_mask & STATX_BTIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) stat->result_mask |= STATX_BTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) stat->btime = ip->i_d.di_crtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * Note: If you add another clause to set an attribute flag, please
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) * update attributes_mask below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) stat->attributes |= STATX_ATTR_IMMUTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) stat->attributes |= STATX_ATTR_APPEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) stat->attributes |= STATX_ATTR_NODUMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) stat->attributes_mask |= (STATX_ATTR_IMMUTABLE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) STATX_ATTR_APPEND |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) STATX_ATTR_NODUMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) switch (inode->i_mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) case S_IFBLK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) case S_IFCHR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) stat->blksize = BLKDEV_IOSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) stat->rdev = inode->i_rdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) stat->blksize = xfs_stat_blksize(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) stat->rdev = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) xfs_setattr_mode(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct inode *inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) umode_t mode = iattr->ia_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) inode->i_mode &= S_IFMT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) inode->i_mode |= mode & ~S_IFMT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) xfs_setattr_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) struct inode *inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (iattr->ia_valid & ATTR_ATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) inode->i_atime = iattr->ia_atime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (iattr->ia_valid & ATTR_CTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) inode->i_ctime = iattr->ia_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (iattr->ia_valid & ATTR_MTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) inode->i_mtime = iattr->ia_mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) xfs_vn_change_ok(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (mp->m_flags & XFS_MOUNT_RDONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) return -EROFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (XFS_FORCED_SHUTDOWN(mp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) return setattr_prepare(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) * Set non-size attributes of an inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * Caution: The caller of this function is responsible for calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * setattr_prepare() or otherwise verifying the change is fine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) xfs_setattr_nonsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) struct iattr *iattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) xfs_mount_t *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) struct inode *inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) int mask = iattr->ia_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) xfs_trans_t *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) struct xfs_dquot *udqp = NULL, *gdqp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) ASSERT((mask & ATTR_SIZE) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) * If disk quotas is on, we make sure that the dquots do exist on disk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) * before we start any other transactions. Trying to do this later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * is messy. We don't care to take a readlock to look at the ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) * in inode here, because we can't hold it across the trans_reserve.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) * If the IDs do change before we take the ilock, we're covered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * because the i_*dquot fields will get updated anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) uint qflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) uid = iattr->ia_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) qflags |= XFS_QMOPT_UQUOTA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) uid = inode->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) gid = iattr->ia_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) qflags |= XFS_QMOPT_GQUOTA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) gid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * We take a reference when we initialize udqp and gdqp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * so it is important that we never blindly double trip on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) * the same variable. See xfs_create() for an example.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) ASSERT(udqp == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) ASSERT(gdqp == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) error = xfs_qm_vop_dqalloc(ip, uid, gid, ip->i_d.di_projid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) qflags, &udqp, &gdqp, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) goto out_dqrele;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) xfs_ilock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) xfs_trans_ijoin(tp, ip, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * Change file ownership. Must be the owner or privileged.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) if (mask & (ATTR_UID|ATTR_GID)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) * These IDs could have changed since we last looked at them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * But, we're assured that if the ownership did change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) * while we didn't have the inode locked, inode's dquot(s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * would have changed also.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) iuid = inode->i_uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) igid = inode->i_gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) * Do a quota reservation only if uid/gid is actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * going to change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) if (XFS_IS_QUOTA_RUNNING(mp) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) ASSERT(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) NULL, capable(CAP_FOWNER) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) XFS_QMOPT_FORCE_RES : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) if (error) /* out of quota */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) goto out_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * CAP_FSETID overrides the following restrictions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) * The set-user-ID and set-group-ID bits of a file will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) * cleared upon successful return from chown()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) !capable(CAP_FSETID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) inode->i_mode &= ~(S_ISUID|S_ISGID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) * Change the ownerships and register quota modifications
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * in the transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) if (!uid_eq(iuid, uid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) ASSERT(mask & ATTR_UID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) ASSERT(udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) olddquot1 = xfs_qm_vop_chown(tp, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) &ip->i_udquot, udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) inode->i_uid = uid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (!gid_eq(igid, gid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) !XFS_IS_PQUOTA_ON(mp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) ASSERT(mask & ATTR_GID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) ASSERT(gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) olddquot2 = xfs_qm_vop_chown(tp, ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) &ip->i_gdquot, gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) inode->i_gid = gid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (mask & ATTR_MODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) xfs_setattr_mode(ip, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) xfs_setattr_time(ip, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) XFS_STATS_INC(mp, xs_ig_attrchg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (mp->m_flags & XFS_MOUNT_WSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) xfs_trans_set_sync(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) error = xfs_trans_commit(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * Release any dquot(s) the inode had kept before chown.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) xfs_qm_dqrele(olddquot1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) xfs_qm_dqrele(olddquot2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) xfs_qm_dqrele(udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) xfs_qm_dqrele(gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * update. We could avoid this with linked transactions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) * and passing down the transaction pointer all the way
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * to attr_set. No previous user of the generic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * Posix ACL code seems to care about this issue either.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) error = posix_acl_chmod(inode, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) out_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) xfs_trans_cancel(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) xfs_iunlock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) out_dqrele:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) xfs_qm_dqrele(udqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) xfs_qm_dqrele(gdqp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) xfs_vn_setattr_nonsize(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) struct xfs_inode *ip = XFS_I(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) trace_xfs_setattr(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) error = xfs_vn_change_ok(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) return xfs_setattr_nonsize(ip, iattr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) * Truncate file. Must have write permission and not be a directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) * Caution: The caller of this function is responsible for calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * setattr_prepare() or otherwise verifying the change is fine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) xfs_setattr_size(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct inode *inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) xfs_off_t oldsize, newsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) struct xfs_trans *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) uint lock_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) bool did_zeroing = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) ASSERT(S_ISREG(inode->i_mode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ATTR_MTIME_SET|ATTR_TIMES_SET)) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) oldsize = inode->i_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) newsize = iattr->ia_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) * Short circuit the truncate case for zero length files.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (newsize == 0 && oldsize == 0 && ip->i_df.if_nextents == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * Use the regular setattr path to update the timestamps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) iattr->ia_valid &= ~ATTR_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return xfs_setattr_nonsize(ip, iattr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) * Make sure that the dquots are attached to the inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) error = xfs_qm_dqattach(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) * Wait for all direct I/O to complete.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) inode_dio_wait(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) * File data changes must be complete before we start the transaction to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) * modify the inode. This needs to be done before joining the inode to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) * the transaction because the inode cannot be unlocked once it is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) * part of the transaction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) * Start with zeroing any data beyond EOF that we may expose on file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) * extension, or zeroing out the rest of the block on a downward
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) * truncate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (newsize > oldsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) trace_xfs_zero_eof(ip, oldsize, newsize - oldsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) error = iomap_zero_range(inode, oldsize, newsize - oldsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) &did_zeroing, &xfs_buffered_write_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) * iomap won't detect a dirty page over an unwritten block (or a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) * cow block over a hole) and subsequently skips zeroing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) * newly post-EOF portion of the page. Flush the new EOF to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) * convert the block before the pagecache truncate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) error = filemap_write_and_wait_range(inode->i_mapping, newsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) newsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) error = iomap_truncate_page(inode, newsize, &did_zeroing,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) &xfs_buffered_write_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) * We've already locked out new page faults, so now we can safely remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) * pages from the page cache knowing they won't get refaulted until we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) * drop the XFS_MMAP_EXCL lock after the extent manipulations are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * complete. The truncate_setsize() call also cleans partial EOF page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) * PTEs on extending truncates and hence ensures sub-page block size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) * filesystems are correctly handled, too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) * We have to do all the page cache truncate work outside the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) * transaction context as the "lock" order is page lock->log space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) * reservation as defined by extent allocation in the writeback path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) * having already truncated the in-memory version of the file (i.e. made
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) * user visible changes). There's not much we can do about this, except
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) * to hope that the caller sees ENOMEM and retries the truncate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) * operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) * And we update in-core i_size and truncate page cache beyond newsize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) * before writeback the [di_size, newsize] range, so we're guaranteed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) * not to write stale data past the new EOF on truncate down.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) truncate_setsize(inode, newsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) * We are going to log the inode size change in this transaction so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) * any previous writes that are beyond the on disk EOF and the new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) * EOF that have not been written out need to be written here. If we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) * do not write the data out, we expose ourselves to the null files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) * problem. Note that this includes any block zeroing we did above;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) * otherwise those blocks may not be zeroed after a crash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) if (did_zeroing ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) ip->i_d.di_size, newsize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) lock_flags |= XFS_ILOCK_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) xfs_ilock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) xfs_trans_ijoin(tp, ip, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) * Only change the c/mtime if we are changing the size or we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) * explicitly asked to change it. This handles the semantic difference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) * between truncate() and ftruncate() as implemented in the VFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) * special case where we need to update the times despite not having
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) * these flags set. For all other operations the VFS set these flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) * explicitly if it wants a timestamp update.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) if (newsize != oldsize &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) iattr->ia_ctime = iattr->ia_mtime =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) * The first thing we do is set the size to new_size permanently on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * disk. This way we don't have to worry about anyone ever being able
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) * to look at the data being freed even in the face of a crash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) * What we're getting around here is the case where we free a block, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) * is allocated to another file, it is written to, and then we crash.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) * If the new data gets written to the file but the log buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) * containing the free and reallocation don't, then we'd end up with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) * garbage in the blocks being freed. As long as we make the new size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) * permanent before actually freeing any blocks it doesn't matter if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) * they get written to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) ip->i_d.di_size = newsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (newsize <= oldsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) goto out_trans_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * Truncated "down", so we're removing references to old data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) * here - if we delay flushing for a long time, we expose
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) * ourselves unduly to the notorious NULL files problem. So,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) * we mark this inode and flush it when the file is closed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) * and do not wait the usual (long) time for writeout.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) xfs_iflags_set(ip, XFS_ITRUNCATED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) /* A truncate down always removes post-EOF blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) xfs_inode_clear_eofblocks_tag(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (iattr->ia_valid & ATTR_MODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) xfs_setattr_mode(ip, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) xfs_setattr_time(ip, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) XFS_STATS_INC(mp, xs_ig_attrchg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) if (mp->m_flags & XFS_MOUNT_WSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) xfs_trans_set_sync(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) error = xfs_trans_commit(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) if (lock_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) xfs_iunlock(ip, lock_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) out_trans_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) xfs_trans_cancel(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) xfs_vn_setattr_size(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) struct xfs_inode *ip = XFS_I(d_inode(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) trace_xfs_setattr(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) error = xfs_vn_change_ok(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) return xfs_setattr_size(ip, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) xfs_vn_setattr(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) struct iattr *iattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (iattr->ia_valid & ATTR_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) struct xfs_inode *ip = XFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) uint iolock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) error = xfs_vn_setattr_size(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) xfs_iunlock(ip, XFS_MMAPLOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) error = xfs_vn_setattr_nonsize(dentry, iattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) xfs_vn_update_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) struct timespec64 *now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) struct xfs_inode *ip = XFS_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) int log_flags = XFS_ILOG_TIMESTAMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) struct xfs_trans *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) trace_xfs_update_time(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) if (inode->i_sb->s_flags & SB_LAZYTIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) if (!((flags & S_VERSION) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) inode_maybe_inc_iversion(inode, false)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) return generic_update_time(inode, now, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) /* Capture the iversion update that just occurred */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) log_flags |= XFS_ILOG_CORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) xfs_ilock(ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) if (flags & S_CTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) inode->i_ctime = *now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) if (flags & S_MTIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) inode->i_mtime = *now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) if (flags & S_ATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) inode->i_atime = *now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) xfs_trans_log_inode(tp, ip, log_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return xfs_trans_commit(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) xfs_vn_fiemap(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) struct fiemap_extent_info *fieinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) u64 start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) u64 length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) fieinfo->fi_flags &= ~FIEMAP_FLAG_XATTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) error = iomap_fiemap(inode, fieinfo, start, length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) &xfs_xattr_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) error = iomap_fiemap(inode, fieinfo, start, length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) &xfs_read_iomap_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) STATIC int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) xfs_vn_tmpfile(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) return xfs_generic_create(dir, dentry, mode, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) static const struct inode_operations xfs_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) .get_acl = xfs_get_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) .set_acl = xfs_set_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) .getattr = xfs_vn_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) .setattr = xfs_vn_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) .listxattr = xfs_vn_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) .fiemap = xfs_vn_fiemap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) .update_time = xfs_vn_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) static const struct inode_operations xfs_dir_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) .create = xfs_vn_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) .lookup = xfs_vn_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) .link = xfs_vn_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) .unlink = xfs_vn_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) .symlink = xfs_vn_symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) .mkdir = xfs_vn_mkdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) * Yes, XFS uses the same method for rmdir and unlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) * There are some subtile differences deeper in the code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) * but we use S_ISDIR to check for those.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) .rmdir = xfs_vn_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) .mknod = xfs_vn_mknod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) .rename = xfs_vn_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) .get_acl = xfs_get_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) .set_acl = xfs_set_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) .getattr = xfs_vn_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) .setattr = xfs_vn_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) .listxattr = xfs_vn_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) .update_time = xfs_vn_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) .tmpfile = xfs_vn_tmpfile,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) static const struct inode_operations xfs_dir_ci_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) .create = xfs_vn_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) .lookup = xfs_vn_ci_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) .link = xfs_vn_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) .unlink = xfs_vn_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) .symlink = xfs_vn_symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) .mkdir = xfs_vn_mkdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) * Yes, XFS uses the same method for rmdir and unlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) * There are some subtile differences deeper in the code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) * but we use S_ISDIR to check for those.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) .rmdir = xfs_vn_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) .mknod = xfs_vn_mknod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) .rename = xfs_vn_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) .get_acl = xfs_get_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) .set_acl = xfs_set_acl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) .getattr = xfs_vn_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) .setattr = xfs_vn_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) .listxattr = xfs_vn_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) .update_time = xfs_vn_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) .tmpfile = xfs_vn_tmpfile,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) static const struct inode_operations xfs_symlink_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) .get_link = xfs_vn_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) .getattr = xfs_vn_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) .setattr = xfs_vn_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) .listxattr = xfs_vn_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) .update_time = xfs_vn_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) static const struct inode_operations xfs_inline_symlink_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) .get_link = xfs_vn_get_link_inline,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) .getattr = xfs_vn_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) .setattr = xfs_vn_setattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) .listxattr = xfs_vn_listxattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) .update_time = xfs_vn_update_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) /* Figure out if this file actually supports DAX. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) static bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) xfs_inode_supports_dax(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) struct xfs_mount *mp = ip->i_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) /* Only supported on regular files. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) if (!S_ISREG(VFS_I(ip)->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) /* Only supported on non-reflinked files. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) if (xfs_is_reflink_inode(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) /* Block size must match page size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) if (mp->m_sb.sb_blocksize != PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) /* Device has to support DAX too. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) return xfs_inode_buftarg(ip)->bt_daxdev != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) static bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) xfs_inode_should_enable_dax(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) if (!IS_ENABLED(CONFIG_FS_DAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) if (ip->i_mount->m_flags & XFS_MOUNT_DAX_NEVER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) if (!xfs_inode_supports_dax(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) if (ip->i_mount->m_flags & XFS_MOUNT_DAX_ALWAYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) if (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) xfs_diflags_to_iflags(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) struct xfs_inode *ip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) bool init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) struct inode *inode = VFS_I(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) unsigned int xflags = xfs_ip2xflags(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) unsigned int flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) ASSERT(!(IS_DAX(inode) && init));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) if (xflags & FS_XFLAG_IMMUTABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) flags |= S_IMMUTABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) if (xflags & FS_XFLAG_APPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) flags |= S_APPEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) if (xflags & FS_XFLAG_SYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) flags |= S_SYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) if (xflags & FS_XFLAG_NOATIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) flags |= S_NOATIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (init && xfs_inode_should_enable_dax(ip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) flags |= S_DAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) * S_DAX can only be set during inode initialization and is never set by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) * the VFS, so we cannot mask off S_DAX in i_flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | S_NOATIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) inode->i_flags |= flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) * Initialize the Linux inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) * When reading existing inodes from disk this is called directly from xfs_iget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) * when creating a new inode it is called from xfs_ialloc after setting up the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) * inode. These callers have different criteria for clearing XFS_INEW, so leave
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) * it up to the caller to deal with unlocking the inode appropriately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) xfs_setup_inode(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) struct inode *inode = &ip->i_vnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) gfp_t gfp_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) inode->i_ino = ip->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) inode->i_state = I_NEW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) inode_sb_list_add(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) /* make the inode look hashed for the writeback code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) inode_fake_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) i_size_write(inode, ip->i_d.di_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) xfs_diflags_to_iflags(ip, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) * We set the i_rwsem class here to avoid potential races with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) * lockdep_annotate_inode_mutex_key() reinitialising the lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) * after a filehandle lookup has already found the inode in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) * cache before it has been unlocked via unlock_new_inode().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) lockdep_set_class(&inode->i_rwsem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) &inode->i_sb->s_type->i_mutex_dir_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) * Ensure all page cache allocations are done from GFP_NOFS context to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) * prevent direct reclaim recursion back into the filesystem and blowing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) * stacks or deadlocking.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) gfp_mask = mapping_gfp_mask(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) * If there is no attribute fork no ACL can exist on this inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) * and it can't have any file capabilities attached to it either.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) if (!XFS_IFORK_Q(ip)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) inode_has_no_xattr(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) cache_no_acl(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) xfs_setup_iops(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) struct xfs_inode *ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) struct inode *inode = &ip->i_vnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) switch (inode->i_mode & S_IFMT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) case S_IFREG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) inode->i_op = &xfs_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) inode->i_fop = &xfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) if (IS_DAX(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) inode->i_mapping->a_ops = &xfs_dax_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) inode->i_mapping->a_ops = &xfs_address_space_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) case S_IFDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) inode->i_op = &xfs_dir_ci_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) inode->i_op = &xfs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) inode->i_fop = &xfs_dir_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) case S_IFLNK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) if (ip->i_df.if_flags & XFS_IFINLINE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) inode->i_op = &xfs_inline_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) inode->i_op = &xfs_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) inode->i_op = &xfs_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) init_special_inode(inode, inode->i_mode, inode->i_rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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