Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 368 insertions, 0 deletions

diff --git a/fs/hpfs/ea.c b/fs/hpfs/ea.c
new file mode 100644
index 000000000..4664f9ab0
--- /dev/null
+++ b/fs/hpfs/ea.c
@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  linux/fs/hpfs/ea.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  handling extended attributes
+ */
+
+#include "hpfs_fn.h"
+
+/* Remove external extended attributes. ano specifies whether a is a 
+   direct sector where eas starts or an anode */
+
+void hpfs_ea_ext_remove(struct super_block *s, secno a, int ano, unsigned len)
+{
+	unsigned pos = 0;
+	while (pos < len) {
+		char ex[4 + 255 + 1 + 8];
+		struct extended_attribute *ea = (struct extended_attribute *)ex;
+		if (pos + 4 > len) {
+			hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+				ano ? "anode" : "sectors", a, len);
+			return;
+		}
+		if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+		if (ea_indirect(ea)) {
+			if (ea_valuelen(ea) != 8) {
+				hpfs_error(s, "ea_indirect(ea) set while ea->valuelen!=8, %s %08x, pos %08x",
+					ano ? "anode" : "sectors", a, pos);
+				return;
+			}
+			if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 9, ex+4))
+				return;
+			hpfs_ea_remove(s, ea_sec(ea), ea_in_anode(ea), ea_len(ea));
+		}
+		pos += ea->namelen + ea_valuelen(ea) + 5;
+	}
+	if (!ano) hpfs_free_sectors(s, a, (len+511) >> 9);
+	else {
+		struct buffer_head *bh;
+		struct anode *anode;
+		if ((anode = hpfs_map_anode(s, a, &bh))) {
+			hpfs_remove_btree(s, GET_BTREE_PTR(&anode->btree));
+			brelse(bh);
+			hpfs_free_sectors(s, a, 1);
+		}
+	}
+}
+
+static char *get_indirect_ea(struct super_block *s, int ano, secno a, int size)
+{
+	char *ret;
+	if (!(ret = kmalloc(size + 1, GFP_NOFS))) {
+		pr_err("out of memory for EA\n");
+		return NULL;
+	}
+	if (hpfs_ea_read(s, a, ano, 0, size, ret)) {
+		kfree(ret);
+		return NULL;
+	}
+	ret[size] = 0;
+	return ret;
+}
+
+static void set_indirect_ea(struct super_block *s, int ano, secno a,
+			    const char *data, int size)
+{
+	hpfs_ea_write(s, a, ano, 0, size, data);
+}
+
+/* Read an extended attribute named 'key' into the provided buffer */
+
+int hpfs_read_ea(struct super_block *s, struct fnode *fnode, char *key,
+		char *buf, int size)
+{
+	unsigned pos;
+	int ano, len;
+	secno a;
+	char ex[4 + 255 + 1 + 8];
+	struct extended_attribute *ea;
+	struct extended_attribute *ea_end = fnode_end_ea(fnode);
+	for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea))
+				goto indirect;
+			if (ea_valuelen(ea) >= size)
+				return -EINVAL;
+			memcpy(buf, ea_data(ea), ea_valuelen(ea));
+			buf[ea_valuelen(ea)] = 0;
+			return 0;
+		}
+	a = le32_to_cpu(fnode->ea_secno);
+	len = le32_to_cpu(fnode->ea_size_l);
+	ano = fnode_in_anode(fnode);
+	pos = 0;
+	while (pos < len) {
+		ea = (struct extended_attribute *)ex;
+		if (pos + 4 > len) {
+			hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+				ano ? "anode" : "sectors", a, len);
+			return -EIO;
+		}
+		if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return -EIO;
+		if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+			return -EIO;
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea))
+				goto indirect;
+			if (ea_valuelen(ea) >= size)
+				return -EINVAL;
+			if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), buf))
+				return -EIO;
+			buf[ea_valuelen(ea)] = 0;
+			return 0;
+		}
+		pos += ea->namelen + ea_valuelen(ea) + 5;
+	}
+	return -ENOENT;
+indirect:
+	if (ea_len(ea) >= size)
+		return -EINVAL;
+	if (hpfs_ea_read(s, ea_sec(ea), ea_in_anode(ea), 0, ea_len(ea), buf))
+		return -EIO;
+	buf[ea_len(ea)] = 0;
+	return 0;
+}
+
+/* Read an extended attribute named 'key' */
+char *hpfs_get_ea(struct super_block *s, struct fnode *fnode, char *key, int *size)
+{
+	char *ret;
+	unsigned pos;
+	int ano, len;
+	secno a;
+	struct extended_attribute *ea;
+	struct extended_attribute *ea_end = fnode_end_ea(fnode);
+	for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea))
+				return get_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), *size = ea_len(ea));
+			if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) {
+				pr_err("out of memory for EA\n");
+				return NULL;
+			}
+			memcpy(ret, ea_data(ea), ea_valuelen(ea));
+			ret[ea_valuelen(ea)] = 0;
+			return ret;
+		}
+	a = le32_to_cpu(fnode->ea_secno);
+	len = le32_to_cpu(fnode->ea_size_l);
+	ano = fnode_in_anode(fnode);
+	pos = 0;
+	while (pos < len) {
+		char ex[4 + 255 + 1 + 8];
+		ea = (struct extended_attribute *)ex;
+		if (pos + 4 > len) {
+			hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+				ano ? "anode" : "sectors", a, len);
+			return NULL;
+		}
+		if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return NULL;
+		if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+			return NULL;
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea))
+				return get_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), *size = ea_len(ea));
+			if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) {
+				pr_err("out of memory for EA\n");
+				return NULL;
+			}
+			if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), ret)) {
+				kfree(ret);
+				return NULL;
+			}
+			ret[ea_valuelen(ea)] = 0;
+			return ret;
+		}
+		pos += ea->namelen + ea_valuelen(ea) + 5;
+	}
+	return NULL;
+}
+
+/* 
+ * Update or create extended attribute 'key' with value 'data'. Note that
+ * when this ea exists, it MUST have the same size as size of data.
+ * This driver can't change sizes of eas ('cause I just don't need it).
+ */
+
+void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
+		 const char *data, int size)
+{
+	fnode_secno fno = inode->i_ino;
+	struct super_block *s = inode->i_sb;
+	unsigned pos;
+	int ano, len;
+	secno a;
+	unsigned char h[4];
+	struct extended_attribute *ea;
+	struct extended_attribute *ea_end = fnode_end_ea(fnode);
+	for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea)) {
+				if (ea_len(ea) == size)
+					set_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), data, size);
+			} else if (ea_valuelen(ea) == size) {
+				memcpy(ea_data(ea), data, size);
+			}
+			return;
+		}
+	a = le32_to_cpu(fnode->ea_secno);
+	len = le32_to_cpu(fnode->ea_size_l);
+	ano = fnode_in_anode(fnode);
+	pos = 0;
+	while (pos < len) {
+		char ex[4 + 255 + 1 + 8];
+		ea = (struct extended_attribute *)ex;
+		if (pos + 4 > len) {
+			hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+				ano ? "anode" : "sectors", a, len);
+			return;
+		}
+		if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+		if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+			return;
+		if (!strcmp(ea->name, key)) {
+			if (ea_indirect(ea)) {
+				if (ea_len(ea) == size)
+					set_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), data, size);
+			}
+			else {
+				if (ea_valuelen(ea) == size)
+					hpfs_ea_write(s, a, ano, pos + 4 + ea->namelen + 1, size, data);
+			}
+			return;
+		}
+		pos += ea->namelen + ea_valuelen(ea) + 5;
+	}
+	if (!le16_to_cpu(fnode->ea_offs)) {
+		/*if (le16_to_cpu(fnode->ea_size_s)) {
+			hpfs_error(s, "fnode %08x: ea_size_s == %03x, ea_offs == 0",
+				inode->i_ino, le16_to_cpu(fnode->ea_size_s));
+			return;
+		}*/
+		fnode->ea_offs = cpu_to_le16(0xc4);
+	}
+	if (le16_to_cpu(fnode->ea_offs) < 0xc4 || le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) > 0x200) {
+		hpfs_error(s, "fnode %08llx: ea_offs == %03x, ea_size_s == %03x",
+			inode->i_ino,
+			le16_to_cpu(fnode->ea_offs), le16_to_cpu(fnode->ea_size_s));
+		return;
+	}
+	if ((le16_to_cpu(fnode->ea_size_s) || !le32_to_cpu(fnode->ea_size_l)) &&
+	     le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5 <= 0x200) {
+		ea = fnode_end_ea(fnode);
+		*(char *)ea = 0;
+		ea->namelen = strlen(key);
+		ea->valuelen_lo = size;
+		ea->valuelen_hi = size >> 8;
+		strcpy(ea->name, key);
+		memcpy(ea_data(ea), data, size);
+		fnode->ea_size_s = cpu_to_le16(le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5);
+		goto ret;
+	}
+	/* Most the code here is 99.9993422% unused. I hope there are no bugs.
+	   But what .. HPFS.IFS has also bugs in ea management. */
+	if (le16_to_cpu(fnode->ea_size_s) && !le32_to_cpu(fnode->ea_size_l)) {
+		secno n;
+		struct buffer_head *bh;
+		char *data;
+		if (!(n = hpfs_alloc_sector(s, fno, 1, 0))) return;
+		if (!(data = hpfs_get_sector(s, n, &bh))) {
+			hpfs_free_sectors(s, n, 1);
+			return;
+		}
+		memcpy(data, fnode_ea(fnode), le16_to_cpu(fnode->ea_size_s));
+		fnode->ea_size_l = cpu_to_le32(le16_to_cpu(fnode->ea_size_s));
+		fnode->ea_size_s = cpu_to_le16(0);
+		fnode->ea_secno = cpu_to_le32(n);
+		fnode->flags &= ~FNODE_anode;
+		mark_buffer_dirty(bh);
+		brelse(bh);
+	}
+	pos = le32_to_cpu(fnode->ea_size_l) + 5 + strlen(key) + size;
+	len = (le32_to_cpu(fnode->ea_size_l) + 511) >> 9;
+	if (pos >= 30000) goto bail;
+	while (((pos + 511) >> 9) > len) {
+		if (!len) {
+			secno q = hpfs_alloc_sector(s, fno, 1, 0);
+			if (!q) goto bail;
+			fnode->ea_secno = cpu_to_le32(q);
+			fnode->flags &= ~FNODE_anode;
+			len++;
+		} else if (!fnode_in_anode(fnode)) {
+			if (hpfs_alloc_if_possible(s, le32_to_cpu(fnode->ea_secno) + len)) {
+				len++;
+			} else {
+				/* Aargh... don't know how to create ea anodes :-( */
+				/*struct buffer_head *bh;
+				struct anode *anode;
+				anode_secno a_s;
+				if (!(anode = hpfs_alloc_anode(s, fno, &a_s, &bh)))
+					goto bail;
+				anode->up = cpu_to_le32(fno);
+				anode->btree.fnode_parent = 1;
+				anode->btree.n_free_nodes--;
+				anode->btree.n_used_nodes++;
+				anode->btree.first_free = cpu_to_le16(le16_to_cpu(anode->btree.first_free) + 12);
+				anode->u.external[0].disk_secno = cpu_to_le32(le32_to_cpu(fnode->ea_secno));
+				anode->u.external[0].file_secno = cpu_to_le32(0);
+				anode->u.external[0].length = cpu_to_le32(len);
+				mark_buffer_dirty(bh);
+				brelse(bh);
+				fnode->flags |= FNODE_anode;
+				fnode->ea_secno = cpu_to_le32(a_s);*/
+				secno new_sec;
+				int i;
+				if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9))))
+					goto bail;
+				for (i = 0; i < len; i++) {
+					struct buffer_head *bh1, *bh2;
+					void *b1, *b2;
+					if (!(b1 = hpfs_map_sector(s, le32_to_cpu(fnode->ea_secno) + i, &bh1, len - i - 1))) {
+						hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+						goto bail;
+					}
+					if (!(b2 = hpfs_get_sector(s, new_sec + i, &bh2))) {
+						brelse(bh1);
+						hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+						goto bail;
+					}
+					memcpy(b2, b1, 512);
+					brelse(bh1);
+					mark_buffer_dirty(bh2);
+					brelse(bh2);
+				}
+				hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno), len);
+				fnode->ea_secno = cpu_to_le32(new_sec);
+				len = (pos + 511) >> 9;
+			}
+		}
+		if (fnode_in_anode(fnode)) {
+			if (hpfs_add_sector_to_btree(s, le32_to_cpu(fnode->ea_secno),
+						     0, len) != -1) {
+				len++;
+			} else {
+				goto bail;
+			}
+		}
+	}
+	h[0] = 0;
+	h[1] = strlen(key);
+	h[2] = size & 0xff;
+	h[3] = size >> 8;
+	if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l), 4, h)) goto bail;
+	if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l) + 4, h[1] + 1, key)) goto bail;
+	if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l) + 5 + h[1], size, data)) goto bail;
+	fnode->ea_size_l = cpu_to_le32(pos);
+	ret:
+	hpfs_i(inode)->i_ea_size += 5 + strlen(key) + size;
+	return;
+	bail:
+	if (le32_to_cpu(fnode->ea_secno))
+		if (fnode_in_anode(fnode)) hpfs_truncate_btree(s, le32_to_cpu(fnode->ea_secno), 1, (le32_to_cpu(fnode->ea_size_l) + 511) >> 9);
+		else hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno) + ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9), len - ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9));
+	else fnode->ea_secno = fnode->ea_size_l = cpu_to_le32(0);
+}
+