4ed2c4aeee
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAmBbFBwACgkQONu9yGCS aT7OPRAAjM8308gp5zU5h7gV20AlMLEfav5BhSJB1NGac8RKJT/kr7CoYt2JWZgO jW4f1uxcjVJypuijkvMPu6+fdDDCen91691F9YqA5B+BdxSC+Vc4MCdhRKWffTtU /vJPrspOWMW7sXGTIXuUyD7zXoUECdmRFb0N62ZOgCiv99aEhxAUsHWF1RIiWfhM p06/WnEkgSpo2hmE369QAnsp8qox6NeTci/7tHbW5/JmjLGCVUf99l2UC7mLZU5a sRQ9Mpb7v78umqmqDct75pKnl3nOfmejIvvPdsQFvs+mgNfPElG/C8WW7JhquA2+ mpnZeVeHyI3MM5/wCSARsYu5m8KnbzOoZ/Ku8B+cblEekZ/yaJx5cSCEMTGi5Ekh noK1IRO0R7UqnV4I36eOY5YNWu6kgHm4/7Zj0Ous5sC6RDjbgNpTgFONvxPzDoo2 5OAX5hf604XXS5dhpQR5RYiU/KH7Ms+nWYViKRCeIuQp8qvyq1pb5X+tPXisetQC 1mylvqiDqeUqdgdwtx8ShN8PH2uyu+dVzWgD+b/DVHM+Rmll+en0LvckmEagH5SV mpBW8j5yPJmdFeIufkibxx6Sr9mT/kbH8QQa/W1ojkya/+Ky1wbCdqVR+BFh/sc0 60Zyoyns3r5o3IM7UrQ9Glb1aYZYJtx/3W2tPKtaczSzj4beVGw= =OoCo -----END PGP SIGNATURE----- Merge 5.4.108 into android11-5.4-lts Changes in 5.4.108 ASoC: ak4458: Add MODULE_DEVICE_TABLE ASoC: ak5558: Add MODULE_DEVICE_TABLE ALSA: dice: fix null pointer dereference when node is disconnected ALSA: hda/realtek: apply pin quirk for XiaomiNotebook Pro ALSA: hda: generic: Fix the micmute led init state ALSA: hda/realtek: Apply headset-mic quirks for Xiaomi Redmibook Air Revert "PM: runtime: Update device status before letting suppliers suspend" s390/vtime: fix increased steal time accounting ARM: 9030/1: entry: omit FP emulation for UND exceptions taken in kernel mode ARM: 9044/1: vfp: use undef hook for VFP support detection btrfs: fix race when cloning extent buffer during rewind of an old root btrfs: fix slab cache flags for free space tree bitmap ASoC: fsl_ssi: Fix TDM slot setup for I2S mode ASoC: SOF: Intel: unregister DMIC device on probe error ASoC: SOF: intel: fix wrong poll bits in dsp power down ASoC: simple-card-utils: Do not handle device clock afs: Stop listxattr() from listing "afs.*" attributes nvme: fix Write Zeroes limitations nvme-tcp: fix possible hang when failing to set io queues nvme-tcp: fix a NULL deref when receiving a 0-length r2t PDU nvmet: don't check iosqes,iocqes for discovery controllers nfsd: Don't keep looking up unhashed files in the nfsd file cache NFSD: Repair misuse of sv_lock in 5.10.16-rt30. svcrdma: disable timeouts on rdma backchannel vfio: IOMMU_API should be selected sunrpc: fix refcount leak for rpc auth modules net/qrtr: fix __netdev_alloc_skb call kbuild: Fix <linux/version.h> for empty SUBLEVEL or PATCHLEVEL again riscv: Correct SPARSEMEM configuration scsi: lpfc: Fix some error codes in debugfs scsi: myrs: Fix a double free in myrs_cleanup() counter: stm32-timer-cnt: Report count function when SLAVE_MODE_DISABLED nvme-rdma: fix possible hang when failing to set io queues usb-storage: Add quirk to defeat Kindle's automatic unload usbip: Fix incorrect double assignment to udc->ud.tcp_rx USB: replace hardcode maximum usb string length by definition usb: gadget: configfs: Fix KASAN use-after-free usb: typec: tcpm: Invoke power_supply_changed for tcpm-source-psy- iio:adc:stm32-adc: Add HAS_IOMEM dependency iio:adc:qcom-spmi-vadc: add default scale to LR_MUX2_BAT_ID channel iio: adis16400: Fix an error code in adis16400_initial_setup() iio: gyro: mpu3050: Fix error handling in mpu3050_trigger_handler iio: adc: ad7949: fix wrong ADC result due to incorrect bit mask iio: hid-sensor-humidity: Fix alignment issue of timestamp channel iio: hid-sensor-prox: Fix scale not correct issue iio: hid-sensor-temperature: Fix issues of timestamp channel counter: stm32-timer-cnt: fix ceiling write max value PCI: rpadlpar: Fix potential drc_name corruption in store functions perf/x86/intel: Fix a crash caused by zero PEBS status x86/ioapic: Ignore IRQ2 again kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data() x86: Move TS_COMPAT back to asm/thread_info.h x86: Introduce TS_COMPAT_RESTART to fix get_nr_restart_syscall() ext4: find old entry again if failed to rename whiteout ext4: do not try to set xattr into ea_inode if value is empty ext4: fix potential error in ext4_do_update_inode efi: use 32-bit alignment for efi_guid_t literals firmware/efi: Fix a use after bug in efi_mem_reserve_persistent genirq: Disable interrupts for force threaded handlers x86/apic/of: Fix CPU devicetree-node lookups cifs: Fix preauth hash corruption Linux 5.4.108 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I9208519e886cf620d37826a0c4b6f88fcd4a090b
407 lines
9.2 KiB
C
407 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Extended attribute handling for AFS. We use xattrs to get and set metadata
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* instead of providing pioctl().
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*
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* Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/xattr.h>
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#include "internal.h"
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/*
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* Get a file's ACL.
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*/
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static int afs_xattr_get_acl(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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void *buffer, size_t size, int flags)
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{
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struct afs_fs_cursor fc;
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struct afs_status_cb *scb;
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struct afs_vnode *vnode = AFS_FS_I(inode);
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struct afs_acl *acl = NULL;
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struct key *key;
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int ret = -ENOMEM;
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scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
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if (!scb)
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goto error;
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key = afs_request_key(vnode->volume->cell);
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if (IS_ERR(key)) {
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ret = PTR_ERR(key);
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goto error_scb;
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}
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ret = -ERESTARTSYS;
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if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
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afs_dataversion_t data_version = vnode->status.data_version;
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while (afs_select_fileserver(&fc)) {
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fc.cb_break = afs_calc_vnode_cb_break(vnode);
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acl = afs_fs_fetch_acl(&fc, scb);
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}
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afs_check_for_remote_deletion(&fc, fc.vnode);
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afs_vnode_commit_status(&fc, vnode, fc.cb_break,
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&data_version, scb);
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ret = afs_end_vnode_operation(&fc);
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}
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if (ret == 0) {
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ret = acl->size;
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if (size > 0) {
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if (acl->size <= size)
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memcpy(buffer, acl->data, acl->size);
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else
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ret = -ERANGE;
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}
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kfree(acl);
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}
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key_put(key);
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error_scb:
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kfree(scb);
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error:
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return ret;
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}
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/*
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* Set a file's AFS3 ACL.
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*/
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static int afs_xattr_set_acl(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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const void *buffer, size_t size, int flags)
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{
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struct afs_fs_cursor fc;
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struct afs_status_cb *scb;
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struct afs_vnode *vnode = AFS_FS_I(inode);
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struct afs_acl *acl = NULL;
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struct key *key;
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int ret = -ENOMEM;
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if (flags == XATTR_CREATE)
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return -EINVAL;
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scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
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if (!scb)
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goto error;
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acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
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if (!acl)
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goto error_scb;
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key = afs_request_key(vnode->volume->cell);
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if (IS_ERR(key)) {
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ret = PTR_ERR(key);
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goto error_acl;
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}
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acl->size = size;
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memcpy(acl->data, buffer, size);
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ret = -ERESTARTSYS;
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if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
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afs_dataversion_t data_version = vnode->status.data_version;
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while (afs_select_fileserver(&fc)) {
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fc.cb_break = afs_calc_vnode_cb_break(vnode);
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afs_fs_store_acl(&fc, acl, scb);
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}
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afs_check_for_remote_deletion(&fc, fc.vnode);
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afs_vnode_commit_status(&fc, vnode, fc.cb_break,
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&data_version, scb);
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ret = afs_end_vnode_operation(&fc);
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}
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key_put(key);
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error_acl:
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kfree(acl);
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error_scb:
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kfree(scb);
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error:
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return ret;
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}
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static const struct xattr_handler afs_xattr_afs_acl_handler = {
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.name = "afs.acl",
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.get = afs_xattr_get_acl,
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.set = afs_xattr_set_acl,
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};
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/*
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* Get a file's YFS ACL.
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*/
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static int afs_xattr_get_yfs(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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void *buffer, size_t size, int flags)
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{
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struct afs_fs_cursor fc;
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struct afs_status_cb *scb;
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struct afs_vnode *vnode = AFS_FS_I(inode);
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struct yfs_acl *yacl = NULL;
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struct key *key;
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char buf[16], *data;
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int which = 0, dsize, ret = -ENOMEM;
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if (strcmp(name, "acl") == 0)
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which = 0;
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else if (strcmp(name, "acl_inherited") == 0)
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which = 1;
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else if (strcmp(name, "acl_num_cleaned") == 0)
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which = 2;
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else if (strcmp(name, "vol_acl") == 0)
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which = 3;
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else
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return -EOPNOTSUPP;
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yacl = kzalloc(sizeof(struct yfs_acl), GFP_KERNEL);
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if (!yacl)
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goto error;
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if (which == 0)
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yacl->flags |= YFS_ACL_WANT_ACL;
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else if (which == 3)
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yacl->flags |= YFS_ACL_WANT_VOL_ACL;
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scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
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if (!scb)
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goto error_yacl;
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key = afs_request_key(vnode->volume->cell);
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if (IS_ERR(key)) {
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ret = PTR_ERR(key);
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goto error_scb;
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}
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ret = -ERESTARTSYS;
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if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
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afs_dataversion_t data_version = vnode->status.data_version;
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while (afs_select_fileserver(&fc)) {
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fc.cb_break = afs_calc_vnode_cb_break(vnode);
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yfs_fs_fetch_opaque_acl(&fc, yacl, scb);
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}
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afs_check_for_remote_deletion(&fc, fc.vnode);
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afs_vnode_commit_status(&fc, vnode, fc.cb_break,
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&data_version, scb);
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ret = afs_end_vnode_operation(&fc);
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}
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if (ret < 0)
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goto error_key;
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switch (which) {
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case 0:
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data = yacl->acl->data;
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dsize = yacl->acl->size;
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break;
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case 1:
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data = buf;
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dsize = scnprintf(buf, sizeof(buf), "%u", yacl->inherit_flag);
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break;
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case 2:
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data = buf;
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dsize = scnprintf(buf, sizeof(buf), "%u", yacl->num_cleaned);
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break;
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case 3:
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data = yacl->vol_acl->data;
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dsize = yacl->vol_acl->size;
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break;
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default:
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ret = -EOPNOTSUPP;
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goto error_key;
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}
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ret = dsize;
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if (size > 0) {
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if (dsize > size) {
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ret = -ERANGE;
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goto error_key;
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}
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memcpy(buffer, data, dsize);
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}
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error_key:
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key_put(key);
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error_scb:
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kfree(scb);
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error_yacl:
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yfs_free_opaque_acl(yacl);
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error:
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return ret;
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}
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/*
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* Set a file's YFS ACL.
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*/
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static int afs_xattr_set_yfs(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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const void *buffer, size_t size, int flags)
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{
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struct afs_fs_cursor fc;
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struct afs_status_cb *scb;
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struct afs_vnode *vnode = AFS_FS_I(inode);
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struct afs_acl *acl = NULL;
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struct key *key;
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int ret = -ENOMEM;
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if (flags == XATTR_CREATE ||
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strcmp(name, "acl") != 0)
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return -EINVAL;
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scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
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if (!scb)
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goto error;
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acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
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if (!acl)
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goto error_scb;
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acl->size = size;
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memcpy(acl->data, buffer, size);
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key = afs_request_key(vnode->volume->cell);
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if (IS_ERR(key)) {
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ret = PTR_ERR(key);
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goto error_acl;
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}
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ret = -ERESTARTSYS;
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if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
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afs_dataversion_t data_version = vnode->status.data_version;
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while (afs_select_fileserver(&fc)) {
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fc.cb_break = afs_calc_vnode_cb_break(vnode);
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yfs_fs_store_opaque_acl2(&fc, acl, scb);
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}
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afs_check_for_remote_deletion(&fc, fc.vnode);
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afs_vnode_commit_status(&fc, vnode, fc.cb_break,
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&data_version, scb);
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ret = afs_end_vnode_operation(&fc);
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}
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error_acl:
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kfree(acl);
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key_put(key);
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error_scb:
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kfree(scb);
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error:
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return ret;
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}
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static const struct xattr_handler afs_xattr_yfs_handler = {
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.prefix = "afs.yfs.",
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.get = afs_xattr_get_yfs,
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.set = afs_xattr_set_yfs,
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};
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/*
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* Get the name of the cell on which a file resides.
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*/
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static int afs_xattr_get_cell(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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void *buffer, size_t size, int flags)
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{
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struct afs_vnode *vnode = AFS_FS_I(inode);
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struct afs_cell *cell = vnode->volume->cell;
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size_t namelen;
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namelen = cell->name_len;
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if (size == 0)
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return namelen;
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if (namelen > size)
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return -ERANGE;
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memcpy(buffer, cell->name, namelen);
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return namelen;
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}
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static const struct xattr_handler afs_xattr_afs_cell_handler = {
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.name = "afs.cell",
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.get = afs_xattr_get_cell,
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};
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/*
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* Get the volume ID, vnode ID and vnode uniquifier of a file as a sequence of
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* hex numbers separated by colons.
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*/
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static int afs_xattr_get_fid(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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void *buffer, size_t size, int flags)
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{
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struct afs_vnode *vnode = AFS_FS_I(inode);
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char text[16 + 1 + 24 + 1 + 8 + 1];
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size_t len;
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/* The volume ID is 64-bit, the vnode ID is 96-bit and the
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* uniquifier is 32-bit.
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*/
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len = scnprintf(text, sizeof(text), "%llx:", vnode->fid.vid);
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if (vnode->fid.vnode_hi)
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len += scnprintf(text + len, sizeof(text) - len, "%x%016llx",
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vnode->fid.vnode_hi, vnode->fid.vnode);
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else
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len += scnprintf(text + len, sizeof(text) - len, "%llx",
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vnode->fid.vnode);
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len += scnprintf(text + len, sizeof(text) - len, ":%x",
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vnode->fid.unique);
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if (size == 0)
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return len;
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if (len > size)
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return -ERANGE;
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memcpy(buffer, text, len);
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return len;
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}
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static const struct xattr_handler afs_xattr_afs_fid_handler = {
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.name = "afs.fid",
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.get = afs_xattr_get_fid,
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};
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/*
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* Get the name of the volume on which a file resides.
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*/
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static int afs_xattr_get_volume(const struct xattr_handler *handler,
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struct dentry *dentry,
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struct inode *inode, const char *name,
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void *buffer, size_t size, int flags)
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{
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struct afs_vnode *vnode = AFS_FS_I(inode);
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const char *volname = vnode->volume->name;
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size_t namelen;
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namelen = strlen(volname);
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if (size == 0)
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return namelen;
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if (namelen > size)
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return -ERANGE;
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memcpy(buffer, volname, namelen);
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return namelen;
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}
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static const struct xattr_handler afs_xattr_afs_volume_handler = {
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.name = "afs.volume",
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.get = afs_xattr_get_volume,
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};
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const struct xattr_handler *afs_xattr_handlers[] = {
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&afs_xattr_afs_acl_handler,
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&afs_xattr_afs_cell_handler,
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&afs_xattr_afs_fid_handler,
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&afs_xattr_afs_volume_handler,
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&afs_xattr_yfs_handler, /* afs.yfs. prefix */
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NULL
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};
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