From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- fs/nfsd/nfsproc.c | 850 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 850 insertions(+) create mode 100644 fs/nfsd/nfsproc.c (limited to 'fs/nfsd/nfsproc.c') diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c new file mode 100644 index 000000000..a82d91afd --- /dev/null +++ b/fs/nfsd/nfsproc.c @@ -0,0 +1,850 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Process version 2 NFS requests. + * + * Copyright (C) 1995-1997 Olaf Kirch + */ + +#include + +#include "cache.h" +#include "xdr.h" +#include "vfs.h" + +#define NFSDDBG_FACILITY NFSDDBG_PROC + +static __be32 +nfsd_proc_null(struct svc_rqst *rqstp) +{ + return rpc_success; +} + +/* + * Get a file's attributes + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_getattr(struct svc_rqst *rqstp) +{ + struct nfsd_fhandle *argp = rqstp->rq_argp; + struct nfsd_attrstat *resp = rqstp->rq_resp; + + dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); + + fh_copy(&resp->fh, &argp->fh); + resp->status = fh_verify(rqstp, &resp->fh, 0, + NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); + if (resp->status != nfs_ok) + goto out; + resp->status = fh_getattr(&resp->fh, &resp->stat); +out: + return rpc_success; +} + +/* + * Set a file's attributes + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_setattr(struct svc_rqst *rqstp) +{ + struct nfsd_sattrargs *argp = rqstp->rq_argp; + struct nfsd_attrstat *resp = rqstp->rq_resp; + struct iattr *iap = &argp->attrs; + struct nfsd_attrs attrs = { + .na_iattr = iap, + }; + struct svc_fh *fhp; + + dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", + SVCFH_fmt(&argp->fh), + argp->attrs.ia_valid, (long) argp->attrs.ia_size); + + fhp = fh_copy(&resp->fh, &argp->fh); + + /* + * NFSv2 does not differentiate between "set-[ac]time-to-now" + * which only requires access, and "set-[ac]time-to-X" which + * requires ownership. + * So if it looks like it might be "set both to the same time which + * is close to now", and if setattr_prepare fails, then we + * convert to "set to now" instead of "set to explicit time" + * + * We only call setattr_prepare as the last test as technically + * it is not an interface that we should be using. + */ +#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) +#define MAX_TOUCH_TIME_ERROR (30*60) + if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && + iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { + /* + * Looks probable. + * + * Now just make sure time is in the right ballpark. + * Solaris, at least, doesn't seem to care what the time + * request is. We require it be within 30 minutes of now. + */ + time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds(); + + resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); + if (resp->status != nfs_ok) + goto out; + + if (delta < 0) + delta = -delta; + if (delta < MAX_TOUCH_TIME_ERROR && + setattr_prepare(&nop_mnt_idmap, fhp->fh_dentry, iap) != 0) { + /* + * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. + * This will cause notify_change to set these times + * to "now" + */ + iap->ia_valid &= ~BOTH_TIME_SET; + } + } + + resp->status = nfsd_setattr(rqstp, fhp, &attrs, 0, (time64_t)0); + if (resp->status != nfs_ok) + goto out; + + resp->status = fh_getattr(&resp->fh, &resp->stat); +out: + return rpc_success; +} + +/* Obsolete, replaced by MNTPROC_MNT. */ +static __be32 +nfsd_proc_root(struct svc_rqst *rqstp) +{ + return rpc_success; +} + +/* + * Look up a path name component + * Note: the dentry in the resp->fh may be negative if the file + * doesn't exist yet. + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_lookup(struct svc_rqst *rqstp) +{ + struct nfsd_diropargs *argp = rqstp->rq_argp; + struct nfsd_diropres *resp = rqstp->rq_resp; + + dprintk("nfsd: LOOKUP %s %.*s\n", + SVCFH_fmt(&argp->fh), argp->len, argp->name); + + fh_init(&resp->fh, NFS_FHSIZE); + resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, + &resp->fh); + fh_put(&argp->fh); + if (resp->status != nfs_ok) + goto out; + + resp->status = fh_getattr(&resp->fh, &resp->stat); +out: + return rpc_success; +} + +/* + * Read a symlink. + */ +static __be32 +nfsd_proc_readlink(struct svc_rqst *rqstp) +{ + struct nfsd_fhandle *argp = rqstp->rq_argp; + struct nfsd_readlinkres *resp = rqstp->rq_resp; + + dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); + + /* Read the symlink. */ + resp->len = NFS_MAXPATHLEN; + resp->page = *(rqstp->rq_next_page++); + resp->status = nfsd_readlink(rqstp, &argp->fh, + page_address(resp->page), &resp->len); + + fh_put(&argp->fh); + return rpc_success; +} + +/* + * Read a portion of a file. + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_read(struct svc_rqst *rqstp) +{ + struct nfsd_readargs *argp = rqstp->rq_argp; + struct nfsd_readres *resp = rqstp->rq_resp; + unsigned int len; + u32 eof; + int v; + + dprintk("nfsd: READ %s %d bytes at %d\n", + SVCFH_fmt(&argp->fh), + argp->count, argp->offset); + + argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2); + argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); + + v = 0; + len = argp->count; + resp->pages = rqstp->rq_next_page; + while (len > 0) { + struct page *page = *(rqstp->rq_next_page++); + + rqstp->rq_vec[v].iov_base = page_address(page); + rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); + len -= rqstp->rq_vec[v].iov_len; + v++; + } + + /* Obtain buffer pointer for payload. 19 is 1 word for + * status, 17 words for fattr, and 1 word for the byte count. + */ + svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); + + resp->count = argp->count; + fh_copy(&resp->fh, &argp->fh); + resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, + rqstp->rq_vec, v, &resp->count, &eof); + if (resp->status == nfs_ok) + resp->status = fh_getattr(&resp->fh, &resp->stat); + else if (resp->status == nfserr_jukebox) + set_bit(RQ_DROPME, &rqstp->rq_flags); + return rpc_success; +} + +/* Reserved */ +static __be32 +nfsd_proc_writecache(struct svc_rqst *rqstp) +{ + return rpc_success; +} + +/* + * Write data to a file + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_write(struct svc_rqst *rqstp) +{ + struct nfsd_writeargs *argp = rqstp->rq_argp; + struct nfsd_attrstat *resp = rqstp->rq_resp; + unsigned long cnt = argp->len; + unsigned int nvecs; + + dprintk("nfsd: WRITE %s %u bytes at %d\n", + SVCFH_fmt(&argp->fh), + argp->len, argp->offset); + + nvecs = svc_fill_write_vector(rqstp, &argp->payload); + + resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), + argp->offset, rqstp->rq_vec, nvecs, + &cnt, NFS_DATA_SYNC, NULL); + if (resp->status == nfs_ok) + resp->status = fh_getattr(&resp->fh, &resp->stat); + else if (resp->status == nfserr_jukebox) + set_bit(RQ_DROPME, &rqstp->rq_flags); + return rpc_success; +} + +/* + * CREATE processing is complicated. The keyword here is `overloaded.' + * The parent directory is kept locked between the check for existence + * and the actual create() call in compliance with VFS protocols. + * N.B. After this call _both_ argp->fh and resp->fh need an fh_put + */ +static __be32 +nfsd_proc_create(struct svc_rqst *rqstp) +{ + struct nfsd_createargs *argp = rqstp->rq_argp; + struct nfsd_diropres *resp = rqstp->rq_resp; + svc_fh *dirfhp = &argp->fh; + svc_fh *newfhp = &resp->fh; + struct iattr *attr = &argp->attrs; + struct nfsd_attrs attrs = { + .na_iattr = attr, + }; + struct inode *inode; + struct dentry *dchild; + int type, mode; + int hosterr; + dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); + + dprintk("nfsd: CREATE %s %.*s\n", + SVCFH_fmt(dirfhp), argp->len, argp->name); + + /* First verify the parent file handle */ + resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); + if (resp->status != nfs_ok) + goto done; /* must fh_put dirfhp even on error */ + + /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ + + resp->status = nfserr_exist; + if (isdotent(argp->name, argp->len)) + goto done; + hosterr = fh_want_write(dirfhp); + if (hosterr) { + resp->status = nfserrno(hosterr); + goto done; + } + + inode_lock_nested(dirfhp->fh_dentry->d_inode, I_MUTEX_PARENT); + dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); + if (IS_ERR(dchild)) { + resp->status = nfserrno(PTR_ERR(dchild)); + goto out_unlock; + } + fh_init(newfhp, NFS_FHSIZE); + resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); + if (!resp->status && d_really_is_negative(dchild)) + resp->status = nfserr_noent; + dput(dchild); + if (resp->status) { + if (resp->status != nfserr_noent) + goto out_unlock; + /* + * If the new file handle wasn't verified, we can't tell + * whether the file exists or not. Time to bail ... + */ + resp->status = nfserr_acces; + if (!newfhp->fh_dentry) { + printk(KERN_WARNING + "nfsd_proc_create: file handle not verified\n"); + goto out_unlock; + } + } + + inode = d_inode(newfhp->fh_dentry); + + /* Unfudge the mode bits */ + if (attr->ia_valid & ATTR_MODE) { + type = attr->ia_mode & S_IFMT; + mode = attr->ia_mode & ~S_IFMT; + if (!type) { + /* no type, so if target exists, assume same as that, + * else assume a file */ + if (inode) { + type = inode->i_mode & S_IFMT; + switch(type) { + case S_IFCHR: + case S_IFBLK: + /* reserve rdev for later checking */ + rdev = inode->i_rdev; + attr->ia_valid |= ATTR_SIZE; + + fallthrough; + case S_IFIFO: + /* this is probably a permission check.. + * at least IRIX implements perm checking on + * echo thing > device-special-file-or-pipe + * by doing a CREATE with type==0 + */ + resp->status = nfsd_permission(rqstp, + newfhp->fh_export, + newfhp->fh_dentry, + NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); + if (resp->status && resp->status != nfserr_rofs) + goto out_unlock; + } + } else + type = S_IFREG; + } + } else if (inode) { + type = inode->i_mode & S_IFMT; + mode = inode->i_mode & ~S_IFMT; + } else { + type = S_IFREG; + mode = 0; /* ??? */ + } + + attr->ia_valid |= ATTR_MODE; + attr->ia_mode = mode; + + /* Special treatment for non-regular files according to the + * gospel of sun micro + */ + if (type != S_IFREG) { + if (type != S_IFBLK && type != S_IFCHR) { + rdev = 0; + } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { + /* If you think you've seen the worst, grok this. */ + type = S_IFIFO; + } else { + /* Okay, char or block special */ + if (!rdev) + rdev = wanted; + } + + /* we've used the SIZE information, so discard it */ + attr->ia_valid &= ~ATTR_SIZE; + + /* Make sure the type and device matches */ + resp->status = nfserr_exist; + if (inode && inode_wrong_type(inode, type)) + goto out_unlock; + } + + resp->status = nfs_ok; + if (!inode) { + /* File doesn't exist. Create it and set attrs */ + resp->status = nfsd_create_locked(rqstp, dirfhp, &attrs, type, + rdev, newfhp); + } else if (type == S_IFREG) { + dprintk("nfsd: existing %s, valid=%x, size=%ld\n", + argp->name, attr->ia_valid, (long) attr->ia_size); + /* File already exists. We ignore all attributes except + * size, so that creat() behaves exactly like + * open(..., O_CREAT|O_TRUNC|O_WRONLY). + */ + attr->ia_valid &= ATTR_SIZE; + if (attr->ia_valid) + resp->status = nfsd_setattr(rqstp, newfhp, &attrs, 0, + (time64_t)0); + } + +out_unlock: + inode_unlock(dirfhp->fh_dentry->d_inode); + fh_drop_write(dirfhp); +done: + fh_put(dirfhp); + if (resp->status != nfs_ok) + goto out; + resp->status = fh_getattr(&resp->fh, &resp->stat); +out: + return rpc_success; +} + +static __be32 +nfsd_proc_remove(struct svc_rqst *rqstp) +{ + struct nfsd_diropargs *argp = rqstp->rq_argp; + struct nfsd_stat *resp = rqstp->rq_resp; + + dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), + argp->len, argp->name); + + /* Unlink. -SIFDIR means file must not be a directory */ + resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, + argp->name, argp->len); + fh_put(&argp->fh); + return rpc_success; +} + +static __be32 +nfsd_proc_rename(struct svc_rqst *rqstp) +{ + struct nfsd_renameargs *argp = rqstp->rq_argp; + struct nfsd_stat *resp = rqstp->rq_resp; + + dprintk("nfsd: RENAME %s %.*s -> \n", + SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); + dprintk("nfsd: -> %s %.*s\n", + SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); + + resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, + &argp->tfh, argp->tname, argp->tlen); + fh_put(&argp->ffh); + fh_put(&argp->tfh); + return rpc_success; +} + +static __be32 +nfsd_proc_link(struct svc_rqst *rqstp) +{ + struct nfsd_linkargs *argp = rqstp->rq_argp; + struct nfsd_stat *resp = rqstp->rq_resp; + + dprintk("nfsd: LINK %s ->\n", + SVCFH_fmt(&argp->ffh)); + dprintk("nfsd: %s %.*s\n", + SVCFH_fmt(&argp->tfh), + argp->tlen, + argp->tname); + + resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, + &argp->ffh); + fh_put(&argp->ffh); + fh_put(&argp->tfh); + return rpc_success; +} + +static __be32 +nfsd_proc_symlink(struct svc_rqst *rqstp) +{ + struct nfsd_symlinkargs *argp = rqstp->rq_argp; + struct nfsd_stat *resp = rqstp->rq_resp; + struct nfsd_attrs attrs = { + .na_iattr = &argp->attrs, + }; + struct svc_fh newfh; + + if (argp->tlen > NFS_MAXPATHLEN) { + resp->status = nfserr_nametoolong; + goto out; + } + + argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, + page_address(rqstp->rq_arg.pages[0]), + argp->tlen); + if (IS_ERR(argp->tname)) { + resp->status = nfserrno(PTR_ERR(argp->tname)); + goto out; + } + + dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", + SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, + argp->tlen, argp->tname); + + fh_init(&newfh, NFS_FHSIZE); + resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, + argp->tname, &attrs, &newfh); + + kfree(argp->tname); + fh_put(&argp->ffh); + fh_put(&newfh); +out: + return rpc_success; +} + +/* + * Make directory. This operation is not idempotent. + * N.B. After this call resp->fh needs an fh_put + */ +static __be32 +nfsd_proc_mkdir(struct svc_rqst *rqstp) +{ + struct nfsd_createargs *argp = rqstp->rq_argp; + struct nfsd_diropres *resp = rqstp->rq_resp; + struct nfsd_attrs attrs = { + .na_iattr = &argp->attrs, + }; + + dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); + + if (resp->fh.fh_dentry) { + printk(KERN_WARNING + "nfsd_proc_mkdir: response already verified??\n"); + } + + argp->attrs.ia_valid &= ~ATTR_SIZE; + fh_init(&resp->fh, NFS_FHSIZE); + resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, + &attrs, S_IFDIR, 0, &resp->fh); + fh_put(&argp->fh); + if (resp->status != nfs_ok) + goto out; + + resp->status = fh_getattr(&resp->fh, &resp->stat); +out: + return rpc_success; +} + +/* + * Remove a directory + */ +static __be32 +nfsd_proc_rmdir(struct svc_rqst *rqstp) +{ + struct nfsd_diropargs *argp = rqstp->rq_argp; + struct nfsd_stat *resp = rqstp->rq_resp; + + dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); + + resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, + argp->name, argp->len); + fh_put(&argp->fh); + return rpc_success; +} + +static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, + struct nfsd_readdirres *resp, + u32 count) +{ + struct xdr_buf *buf = &resp->dirlist; + struct xdr_stream *xdr = &resp->xdr; + + memset(buf, 0, sizeof(*buf)); + + /* Reserve room for the NULL ptr & eof flag (-2 words) */ + buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), (u32)PAGE_SIZE); + buf->buflen -= XDR_UNIT * 2; + buf->pages = rqstp->rq_next_page; + rqstp->rq_next_page++; + + xdr_init_encode_pages(xdr, buf, buf->pages, NULL); +} + +/* + * Read a portion of a directory. + */ +static __be32 +nfsd_proc_readdir(struct svc_rqst *rqstp) +{ + struct nfsd_readdirargs *argp = rqstp->rq_argp; + struct nfsd_readdirres *resp = rqstp->rq_resp; + loff_t offset; + + dprintk("nfsd: READDIR %s %d bytes at %d\n", + SVCFH_fmt(&argp->fh), + argp->count, argp->cookie); + + nfsd_init_dirlist_pages(rqstp, resp, argp->count); + + resp->common.err = nfs_ok; + resp->cookie_offset = 0; + offset = argp->cookie; + resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, + &resp->common, nfssvc_encode_entry); + nfssvc_encode_nfscookie(resp, offset); + + fh_put(&argp->fh); + return rpc_success; +} + +/* + * Get file system info + */ +static __be32 +nfsd_proc_statfs(struct svc_rqst *rqstp) +{ + struct nfsd_fhandle *argp = rqstp->rq_argp; + struct nfsd_statfsres *resp = rqstp->rq_resp; + + dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); + + resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, + NFSD_MAY_BYPASS_GSS_ON_ROOT); + fh_put(&argp->fh); + return rpc_success; +} + +/* + * NFSv2 Server procedures. + * Only the results of non-idempotent operations are cached. + */ + +#define ST 1 /* status */ +#define FH 8 /* filehandle */ +#define AT 18 /* attributes */ + +static const struct svc_procedure nfsd_procedures2[18] = { + [NFSPROC_NULL] = { + .pc_func = nfsd_proc_null, + .pc_decode = nfssvc_decode_voidarg, + .pc_encode = nfssvc_encode_voidres, + .pc_argsize = sizeof(struct nfsd_voidargs), + .pc_argzero = sizeof(struct nfsd_voidargs), + .pc_ressize = sizeof(struct nfsd_voidres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = 0, + .pc_name = "NULL", + }, + [NFSPROC_GETATTR] = { + .pc_func = nfsd_proc_getattr, + .pc_decode = nfssvc_decode_fhandleargs, + .pc_encode = nfssvc_encode_attrstatres, + .pc_release = nfssvc_release_attrstat, + .pc_argsize = sizeof(struct nfsd_fhandle), + .pc_argzero = sizeof(struct nfsd_fhandle), + .pc_ressize = sizeof(struct nfsd_attrstat), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = ST+AT, + .pc_name = "GETATTR", + }, + [NFSPROC_SETATTR] = { + .pc_func = nfsd_proc_setattr, + .pc_decode = nfssvc_decode_sattrargs, + .pc_encode = nfssvc_encode_attrstatres, + .pc_release = nfssvc_release_attrstat, + .pc_argsize = sizeof(struct nfsd_sattrargs), + .pc_argzero = sizeof(struct nfsd_sattrargs), + .pc_ressize = sizeof(struct nfsd_attrstat), + .pc_cachetype = RC_REPLBUFF, + .pc_xdrressize = ST+AT, + .pc_name = "SETATTR", + }, + [NFSPROC_ROOT] = { + .pc_func = nfsd_proc_root, + .pc_decode = nfssvc_decode_voidarg, + .pc_encode = nfssvc_encode_voidres, + .pc_argsize = sizeof(struct nfsd_voidargs), + .pc_argzero = sizeof(struct nfsd_voidargs), + .pc_ressize = sizeof(struct nfsd_voidres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = 0, + .pc_name = "ROOT", + }, + [NFSPROC_LOOKUP] = { + .pc_func = nfsd_proc_lookup, + .pc_decode = nfssvc_decode_diropargs, + .pc_encode = nfssvc_encode_diropres, + .pc_release = nfssvc_release_diropres, + .pc_argsize = sizeof(struct nfsd_diropargs), + .pc_argzero = sizeof(struct nfsd_diropargs), + .pc_ressize = sizeof(struct nfsd_diropres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = ST+FH+AT, + .pc_name = "LOOKUP", + }, + [NFSPROC_READLINK] = { + .pc_func = nfsd_proc_readlink, + .pc_decode = nfssvc_decode_fhandleargs, + .pc_encode = nfssvc_encode_readlinkres, + .pc_argsize = sizeof(struct nfsd_fhandle), + .pc_argzero = sizeof(struct nfsd_fhandle), + .pc_ressize = sizeof(struct nfsd_readlinkres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, + .pc_name = "READLINK", + }, + [NFSPROC_READ] = { + .pc_func = nfsd_proc_read, + .pc_decode = nfssvc_decode_readargs, + .pc_encode = nfssvc_encode_readres, + .pc_release = nfssvc_release_readres, + .pc_argsize = sizeof(struct nfsd_readargs), + .pc_argzero = sizeof(struct nfsd_readargs), + .pc_ressize = sizeof(struct nfsd_readres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, + .pc_name = "READ", + }, + [NFSPROC_WRITECACHE] = { + .pc_func = nfsd_proc_writecache, + .pc_decode = nfssvc_decode_voidarg, + .pc_encode = nfssvc_encode_voidres, + .pc_argsize = sizeof(struct nfsd_voidargs), + .pc_argzero = sizeof(struct nfsd_voidargs), + .pc_ressize = sizeof(struct nfsd_voidres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = 0, + .pc_name = "WRITECACHE", + }, + [NFSPROC_WRITE] = { + .pc_func = nfsd_proc_write, + .pc_decode = nfssvc_decode_writeargs, + .pc_encode = nfssvc_encode_attrstatres, + .pc_release = nfssvc_release_attrstat, + .pc_argsize = sizeof(struct nfsd_writeargs), + .pc_argzero = sizeof(struct nfsd_writeargs), + .pc_ressize = sizeof(struct nfsd_attrstat), + .pc_cachetype = RC_REPLBUFF, + .pc_xdrressize = ST+AT, + .pc_name = "WRITE", + }, + [NFSPROC_CREATE] = { + .pc_func = nfsd_proc_create, + .pc_decode = nfssvc_decode_createargs, + .pc_encode = nfssvc_encode_diropres, + .pc_release = nfssvc_release_diropres, + .pc_argsize = sizeof(struct nfsd_createargs), + .pc_argzero = sizeof(struct nfsd_createargs), + .pc_ressize = sizeof(struct nfsd_diropres), + .pc_cachetype = RC_REPLBUFF, + .pc_xdrressize = ST+FH+AT, + .pc_name = "CREATE", + }, + [NFSPROC_REMOVE] = { + .pc_func = nfsd_proc_remove, + .pc_decode = nfssvc_decode_diropargs, + .pc_encode = nfssvc_encode_statres, + .pc_argsize = sizeof(struct nfsd_diropargs), + .pc_argzero = sizeof(struct nfsd_diropargs), + .pc_ressize = sizeof(struct nfsd_stat), + .pc_cachetype = RC_REPLSTAT, + .pc_xdrressize = ST, + .pc_name = "REMOVE", + }, + [NFSPROC_RENAME] = { + .pc_func = nfsd_proc_rename, + .pc_decode = nfssvc_decode_renameargs, + .pc_encode = nfssvc_encode_statres, + .pc_argsize = sizeof(struct nfsd_renameargs), + .pc_argzero = sizeof(struct nfsd_renameargs), + .pc_ressize = sizeof(struct nfsd_stat), + .pc_cachetype = RC_REPLSTAT, + .pc_xdrressize = ST, + .pc_name = "RENAME", + }, + [NFSPROC_LINK] = { + .pc_func = nfsd_proc_link, + .pc_decode = nfssvc_decode_linkargs, + .pc_encode = nfssvc_encode_statres, + .pc_argsize = sizeof(struct nfsd_linkargs), + .pc_argzero = sizeof(struct nfsd_linkargs), + .pc_ressize = sizeof(struct nfsd_stat), + .pc_cachetype = RC_REPLSTAT, + .pc_xdrressize = ST, + .pc_name = "LINK", + }, + [NFSPROC_SYMLINK] = { + .pc_func = nfsd_proc_symlink, + .pc_decode = nfssvc_decode_symlinkargs, + .pc_encode = nfssvc_encode_statres, + .pc_argsize = sizeof(struct nfsd_symlinkargs), + .pc_argzero = sizeof(struct nfsd_symlinkargs), + .pc_ressize = sizeof(struct nfsd_stat), + .pc_cachetype = RC_REPLSTAT, + .pc_xdrressize = ST, + .pc_name = "SYMLINK", + }, + [NFSPROC_MKDIR] = { + .pc_func = nfsd_proc_mkdir, + .pc_decode = nfssvc_decode_createargs, + .pc_encode = nfssvc_encode_diropres, + .pc_release = nfssvc_release_diropres, + .pc_argsize = sizeof(struct nfsd_createargs), + .pc_argzero = sizeof(struct nfsd_createargs), + .pc_ressize = sizeof(struct nfsd_diropres), + .pc_cachetype = RC_REPLBUFF, + .pc_xdrressize = ST+FH+AT, + .pc_name = "MKDIR", + }, + [NFSPROC_RMDIR] = { + .pc_func = nfsd_proc_rmdir, + .pc_decode = nfssvc_decode_diropargs, + .pc_encode = nfssvc_encode_statres, + .pc_argsize = sizeof(struct nfsd_diropargs), + .pc_argzero = sizeof(struct nfsd_diropargs), + .pc_ressize = sizeof(struct nfsd_stat), + .pc_cachetype = RC_REPLSTAT, + .pc_xdrressize = ST, + .pc_name = "RMDIR", + }, + [NFSPROC_READDIR] = { + .pc_func = nfsd_proc_readdir, + .pc_decode = nfssvc_decode_readdirargs, + .pc_encode = nfssvc_encode_readdirres, + .pc_argsize = sizeof(struct nfsd_readdirargs), + .pc_argzero = sizeof(struct nfsd_readdirargs), + .pc_ressize = sizeof(struct nfsd_readdirres), + .pc_cachetype = RC_NOCACHE, + .pc_name = "READDIR", + }, + [NFSPROC_STATFS] = { + .pc_func = nfsd_proc_statfs, + .pc_decode = nfssvc_decode_fhandleargs, + .pc_encode = nfssvc_encode_statfsres, + .pc_argsize = sizeof(struct nfsd_fhandle), + .pc_argzero = sizeof(struct nfsd_fhandle), + .pc_ressize = sizeof(struct nfsd_statfsres), + .pc_cachetype = RC_NOCACHE, + .pc_xdrressize = ST+5, + .pc_name = "STATFS", + }, +}; + + +static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; +const struct svc_version nfsd_version2 = { + .vs_vers = 2, + .vs_nproc = 18, + .vs_proc = nfsd_procedures2, + .vs_count = nfsd_count2, + .vs_dispatch = nfsd_dispatch, + .vs_xdrsize = NFS2_SVC_XDRSIZE, +}; -- cgit v1.2.3