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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /fs/nilfs2/direct.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'fs/nilfs2/direct.c')
-rw-r--r--fs/nilfs2/direct.c378
1 files changed, 378 insertions, 0 deletions
diff --git a/fs/nilfs2/direct.c b/fs/nilfs2/direct.c
new file mode 100644
index 000000000..a35f2795b
--- /dev/null
+++ b/fs/nilfs2/direct.c
@@ -0,0 +1,378 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * NILFS direct block pointer.
+ *
+ * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * Written by Koji Sato.
+ */
+
+#include <linux/errno.h>
+#include "nilfs.h"
+#include "page.h"
+#include "direct.h"
+#include "alloc.h"
+#include "dat.h"
+
+static inline __le64 *nilfs_direct_dptrs(const struct nilfs_bmap *direct)
+{
+ return (__le64 *)
+ ((struct nilfs_direct_node *)direct->b_u.u_data + 1);
+}
+
+static inline __u64
+nilfs_direct_get_ptr(const struct nilfs_bmap *direct, __u64 key)
+{
+ return le64_to_cpu(*(nilfs_direct_dptrs(direct) + key));
+}
+
+static inline void nilfs_direct_set_ptr(struct nilfs_bmap *direct,
+ __u64 key, __u64 ptr)
+{
+ *(nilfs_direct_dptrs(direct) + key) = cpu_to_le64(ptr);
+}
+
+static int nilfs_direct_lookup(const struct nilfs_bmap *direct,
+ __u64 key, int level, __u64 *ptrp)
+{
+ __u64 ptr;
+
+ if (key > NILFS_DIRECT_KEY_MAX || level != 1)
+ return -ENOENT;
+ ptr = nilfs_direct_get_ptr(direct, key);
+ if (ptr == NILFS_BMAP_INVALID_PTR)
+ return -ENOENT;
+
+ *ptrp = ptr;
+ return 0;
+}
+
+static int nilfs_direct_lookup_contig(const struct nilfs_bmap *direct,
+ __u64 key, __u64 *ptrp,
+ unsigned int maxblocks)
+{
+ struct inode *dat = NULL;
+ __u64 ptr, ptr2;
+ sector_t blocknr;
+ int ret, cnt;
+
+ if (key > NILFS_DIRECT_KEY_MAX)
+ return -ENOENT;
+ ptr = nilfs_direct_get_ptr(direct, key);
+ if (ptr == NILFS_BMAP_INVALID_PTR)
+ return -ENOENT;
+
+ if (NILFS_BMAP_USE_VBN(direct)) {
+ dat = nilfs_bmap_get_dat(direct);
+ ret = nilfs_dat_translate(dat, ptr, &blocknr);
+ if (ret < 0)
+ return ret;
+ ptr = blocknr;
+ }
+
+ maxblocks = min_t(unsigned int, maxblocks,
+ NILFS_DIRECT_KEY_MAX - key + 1);
+ for (cnt = 1; cnt < maxblocks &&
+ (ptr2 = nilfs_direct_get_ptr(direct, key + cnt)) !=
+ NILFS_BMAP_INVALID_PTR;
+ cnt++) {
+ if (dat) {
+ ret = nilfs_dat_translate(dat, ptr2, &blocknr);
+ if (ret < 0)
+ return ret;
+ ptr2 = blocknr;
+ }
+ if (ptr2 != ptr + cnt)
+ break;
+ }
+ *ptrp = ptr;
+ return cnt;
+}
+
+static __u64
+nilfs_direct_find_target_v(const struct nilfs_bmap *direct, __u64 key)
+{
+ __u64 ptr;
+
+ ptr = nilfs_bmap_find_target_seq(direct, key);
+ if (ptr != NILFS_BMAP_INVALID_PTR)
+ /* sequential access */
+ return ptr;
+
+ /* block group */
+ return nilfs_bmap_find_target_in_group(direct);
+}
+
+static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
+{
+ union nilfs_bmap_ptr_req req;
+ struct inode *dat = NULL;
+ struct buffer_head *bh;
+ int ret;
+
+ if (key > NILFS_DIRECT_KEY_MAX)
+ return -ENOENT;
+ if (nilfs_direct_get_ptr(bmap, key) != NILFS_BMAP_INVALID_PTR)
+ return -EEXIST;
+
+ if (NILFS_BMAP_USE_VBN(bmap)) {
+ req.bpr_ptr = nilfs_direct_find_target_v(bmap, key);
+ dat = nilfs_bmap_get_dat(bmap);
+ }
+ ret = nilfs_bmap_prepare_alloc_ptr(bmap, &req, dat);
+ if (!ret) {
+ /* ptr must be a pointer to a buffer head. */
+ bh = (struct buffer_head *)((unsigned long)ptr);
+ set_buffer_nilfs_volatile(bh);
+
+ nilfs_bmap_commit_alloc_ptr(bmap, &req, dat);
+ nilfs_direct_set_ptr(bmap, key, req.bpr_ptr);
+
+ if (!nilfs_bmap_dirty(bmap))
+ nilfs_bmap_set_dirty(bmap);
+
+ if (NILFS_BMAP_USE_VBN(bmap))
+ nilfs_bmap_set_target_v(bmap, key, req.bpr_ptr);
+
+ nilfs_inode_add_blocks(bmap->b_inode, 1);
+ }
+ return ret;
+}
+
+static int nilfs_direct_delete(struct nilfs_bmap *bmap, __u64 key)
+{
+ union nilfs_bmap_ptr_req req;
+ struct inode *dat;
+ int ret;
+
+ if (key > NILFS_DIRECT_KEY_MAX ||
+ nilfs_direct_get_ptr(bmap, key) == NILFS_BMAP_INVALID_PTR)
+ return -ENOENT;
+
+ dat = NILFS_BMAP_USE_VBN(bmap) ? nilfs_bmap_get_dat(bmap) : NULL;
+ req.bpr_ptr = nilfs_direct_get_ptr(bmap, key);
+
+ ret = nilfs_bmap_prepare_end_ptr(bmap, &req, dat);
+ if (!ret) {
+ nilfs_bmap_commit_end_ptr(bmap, &req, dat);
+ nilfs_direct_set_ptr(bmap, key, NILFS_BMAP_INVALID_PTR);
+ nilfs_inode_sub_blocks(bmap->b_inode, 1);
+ }
+ return ret;
+}
+
+static int nilfs_direct_seek_key(const struct nilfs_bmap *direct, __u64 start,
+ __u64 *keyp)
+{
+ __u64 key;
+
+ for (key = start; key <= NILFS_DIRECT_KEY_MAX; key++) {
+ if (nilfs_direct_get_ptr(direct, key) !=
+ NILFS_BMAP_INVALID_PTR) {
+ *keyp = key;
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+static int nilfs_direct_last_key(const struct nilfs_bmap *direct, __u64 *keyp)
+{
+ __u64 key, lastkey;
+
+ lastkey = NILFS_DIRECT_KEY_MAX + 1;
+ for (key = NILFS_DIRECT_KEY_MIN; key <= NILFS_DIRECT_KEY_MAX; key++)
+ if (nilfs_direct_get_ptr(direct, key) !=
+ NILFS_BMAP_INVALID_PTR)
+ lastkey = key;
+
+ if (lastkey == NILFS_DIRECT_KEY_MAX + 1)
+ return -ENOENT;
+
+ *keyp = lastkey;
+
+ return 0;
+}
+
+static int nilfs_direct_check_insert(const struct nilfs_bmap *bmap, __u64 key)
+{
+ return key > NILFS_DIRECT_KEY_MAX;
+}
+
+static int nilfs_direct_gather_data(struct nilfs_bmap *direct,
+ __u64 *keys, __u64 *ptrs, int nitems)
+{
+ __u64 key;
+ __u64 ptr;
+ int n;
+
+ if (nitems > NILFS_DIRECT_NBLOCKS)
+ nitems = NILFS_DIRECT_NBLOCKS;
+ n = 0;
+ for (key = 0; key < nitems; key++) {
+ ptr = nilfs_direct_get_ptr(direct, key);
+ if (ptr != NILFS_BMAP_INVALID_PTR) {
+ keys[n] = key;
+ ptrs[n] = ptr;
+ n++;
+ }
+ }
+ return n;
+}
+
+int nilfs_direct_delete_and_convert(struct nilfs_bmap *bmap,
+ __u64 key, __u64 *keys, __u64 *ptrs, int n)
+{
+ __le64 *dptrs;
+ int ret, i, j;
+
+ /* no need to allocate any resource for conversion */
+
+ /* delete */
+ ret = bmap->b_ops->bop_delete(bmap, key);
+ if (ret < 0)
+ return ret;
+
+ /* free resources */
+ if (bmap->b_ops->bop_clear != NULL)
+ bmap->b_ops->bop_clear(bmap);
+
+ /* convert */
+ dptrs = nilfs_direct_dptrs(bmap);
+ for (i = 0, j = 0; i < NILFS_DIRECT_NBLOCKS; i++) {
+ if ((j < n) && (i == keys[j])) {
+ dptrs[i] = (i != key) ?
+ cpu_to_le64(ptrs[j]) :
+ NILFS_BMAP_INVALID_PTR;
+ j++;
+ } else
+ dptrs[i] = NILFS_BMAP_INVALID_PTR;
+ }
+
+ nilfs_direct_init(bmap);
+ return 0;
+}
+
+static int nilfs_direct_propagate(struct nilfs_bmap *bmap,
+ struct buffer_head *bh)
+{
+ struct nilfs_palloc_req oldreq, newreq;
+ struct inode *dat;
+ __u64 key;
+ __u64 ptr;
+ int ret;
+
+ if (!NILFS_BMAP_USE_VBN(bmap))
+ return 0;
+
+ dat = nilfs_bmap_get_dat(bmap);
+ key = nilfs_bmap_data_get_key(bmap, bh);
+ ptr = nilfs_direct_get_ptr(bmap, key);
+ if (!buffer_nilfs_volatile(bh)) {
+ oldreq.pr_entry_nr = ptr;
+ newreq.pr_entry_nr = ptr;
+ ret = nilfs_dat_prepare_update(dat, &oldreq, &newreq);
+ if (ret < 0)
+ return ret;
+ nilfs_dat_commit_update(dat, &oldreq, &newreq,
+ bmap->b_ptr_type == NILFS_BMAP_PTR_VS);
+ set_buffer_nilfs_volatile(bh);
+ nilfs_direct_set_ptr(bmap, key, newreq.pr_entry_nr);
+ } else
+ ret = nilfs_dat_mark_dirty(dat, ptr);
+
+ return ret;
+}
+
+static int nilfs_direct_assign_v(struct nilfs_bmap *direct,
+ __u64 key, __u64 ptr,
+ struct buffer_head **bh,
+ sector_t blocknr,
+ union nilfs_binfo *binfo)
+{
+ struct inode *dat = nilfs_bmap_get_dat(direct);
+ union nilfs_bmap_ptr_req req;
+ int ret;
+
+ req.bpr_ptr = ptr;
+ ret = nilfs_dat_prepare_start(dat, &req.bpr_req);
+ if (!ret) {
+ nilfs_dat_commit_start(dat, &req.bpr_req, blocknr);
+ binfo->bi_v.bi_vblocknr = cpu_to_le64(ptr);
+ binfo->bi_v.bi_blkoff = cpu_to_le64(key);
+ }
+ return ret;
+}
+
+static int nilfs_direct_assign_p(struct nilfs_bmap *direct,
+ __u64 key, __u64 ptr,
+ struct buffer_head **bh,
+ sector_t blocknr,
+ union nilfs_binfo *binfo)
+{
+ nilfs_direct_set_ptr(direct, key, blocknr);
+
+ binfo->bi_dat.bi_blkoff = cpu_to_le64(key);
+ binfo->bi_dat.bi_level = 0;
+
+ return 0;
+}
+
+static int nilfs_direct_assign(struct nilfs_bmap *bmap,
+ struct buffer_head **bh,
+ sector_t blocknr,
+ union nilfs_binfo *binfo)
+{
+ __u64 key;
+ __u64 ptr;
+
+ key = nilfs_bmap_data_get_key(bmap, *bh);
+ if (unlikely(key > NILFS_DIRECT_KEY_MAX)) {
+ nilfs_crit(bmap->b_inode->i_sb,
+ "%s (ino=%lu): invalid key: %llu",
+ __func__,
+ bmap->b_inode->i_ino, (unsigned long long)key);
+ return -EINVAL;
+ }
+ ptr = nilfs_direct_get_ptr(bmap, key);
+ if (unlikely(ptr == NILFS_BMAP_INVALID_PTR)) {
+ nilfs_crit(bmap->b_inode->i_sb,
+ "%s (ino=%lu): invalid pointer: %llu",
+ __func__,
+ bmap->b_inode->i_ino, (unsigned long long)ptr);
+ return -EINVAL;
+ }
+
+ return NILFS_BMAP_USE_VBN(bmap) ?
+ nilfs_direct_assign_v(bmap, key, ptr, bh, blocknr, binfo) :
+ nilfs_direct_assign_p(bmap, key, ptr, bh, blocknr, binfo);
+}
+
+static const struct nilfs_bmap_operations nilfs_direct_ops = {
+ .bop_lookup = nilfs_direct_lookup,
+ .bop_lookup_contig = nilfs_direct_lookup_contig,
+ .bop_insert = nilfs_direct_insert,
+ .bop_delete = nilfs_direct_delete,
+ .bop_clear = NULL,
+
+ .bop_propagate = nilfs_direct_propagate,
+
+ .bop_lookup_dirty_buffers = NULL,
+
+ .bop_assign = nilfs_direct_assign,
+ .bop_mark = NULL,
+
+ .bop_seek_key = nilfs_direct_seek_key,
+ .bop_last_key = nilfs_direct_last_key,
+
+ .bop_check_insert = nilfs_direct_check_insert,
+ .bop_check_delete = NULL,
+ .bop_gather_data = nilfs_direct_gather_data,
+};
+
+
+int nilfs_direct_init(struct nilfs_bmap *bmap)
+{
+ bmap->b_ops = &nilfs_direct_ops;
+ return 0;
+}