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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /fs/nfs/nfs3proc.c | |
download | linux-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/nfs/nfs3proc.c')
-rw-r--r-- | fs/nfs/nfs3proc.c | 1068 |
1 files changed, 1068 insertions, 0 deletions
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c new file mode 100644 index 000000000..4bf208a0a --- /dev/null +++ b/fs/nfs/nfs3proc.c @@ -0,0 +1,1068 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/nfs/nfs3proc.c + * + * Client-side NFSv3 procedures stubs. + * + * Copyright (C) 1997, Olaf Kirch + */ + +#include <linux/mm.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/sunrpc/clnt.h> +#include <linux/slab.h> +#include <linux/nfs.h> +#include <linux/nfs3.h> +#include <linux/nfs_fs.h> +#include <linux/nfs_page.h> +#include <linux/lockd/bind.h> +#include <linux/nfs_mount.h> +#include <linux/freezer.h> +#include <linux/xattr.h> + +#include "iostat.h" +#include "internal.h" +#include "nfs3_fs.h" + +#define NFSDBG_FACILITY NFSDBG_PROC + +/* A wrapper to handle the EJUKEBOX error messages */ +static int +nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) +{ + int res; + do { + res = rpc_call_sync(clnt, msg, flags); + if (res != -EJUKEBOX) + break; + __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); + schedule_timeout(NFS_JUKEBOX_RETRY_TIME); + res = -ERESTARTSYS; + } while (!fatal_signal_pending(current)); + return res; +} + +#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) + +static int +nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) +{ + if (task->tk_status != -EJUKEBOX) + return 0; + nfs_inc_stats(inode, NFSIOS_DELAY); + task->tk_status = 0; + rpc_restart_call(task); + rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); + return 1; +} + +static int +do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], + .rpc_argp = fhandle, + .rpc_resp = info, + }; + int status; + + dprintk("%s: call fsinfo\n", __func__); + nfs_fattr_init(info->fattr); + status = rpc_call_sync(client, &msg, 0); + dprintk("%s: reply fsinfo: %d\n", __func__, status); + if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) { + msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; + msg.rpc_resp = info->fattr; + status = rpc_call_sync(client, &msg, 0); + dprintk("%s: reply getattr: %d\n", __func__, status); + } + return status; +} + +/* + * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb + */ +static int +nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + int status; + + status = do_proc_get_root(server->client, fhandle, info); + if (status && server->nfs_client->cl_rpcclient != server->client) + status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); + return status; +} + +/* + * One function for each procedure in the NFS protocol. + */ +static int +nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fattr *fattr, struct inode *inode) +{ + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], + .rpc_argp = fhandle, + .rpc_resp = fattr, + }; + int status; + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) + task_flags |= RPC_TASK_TIMEOUT; + + dprintk("NFS call getattr\n"); + nfs_fattr_init(fattr); + status = rpc_call_sync(server->client, &msg, task_flags); + dprintk("NFS reply getattr: %d\n", status); + return status; +} + +static int +nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, + struct iattr *sattr) +{ + struct inode *inode = d_inode(dentry); + struct nfs3_sattrargs arg = { + .fh = NFS_FH(inode), + .sattr = sattr, + }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], + .rpc_argp = &arg, + .rpc_resp = fattr, + }; + int status; + + dprintk("NFS call setattr\n"); + if (sattr->ia_valid & ATTR_FILE) + msg.rpc_cred = nfs_file_cred(sattr->ia_file); + nfs_fattr_init(fattr); + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); + if (status == 0) { + nfs_setattr_update_inode(inode, sattr, fattr); + if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) + nfs_zap_acl_cache(inode); + } + dprintk("NFS reply setattr: %d\n", status); + return status; +} + +static int +__nfs3_proc_lookup(struct inode *dir, const char *name, size_t len, + struct nfs_fh *fhandle, struct nfs_fattr *fattr, + unsigned short task_flags) +{ + struct nfs3_diropargs arg = { + .fh = NFS_FH(dir), + .name = name, + .len = len + }; + struct nfs3_diropres res = { + .fh = fhandle, + .fattr = fattr + }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int status; + + res.dir_attr = nfs_alloc_fattr(); + if (res.dir_attr == NULL) + return -ENOMEM; + + nfs_fattr_init(fattr); + status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); + nfs_refresh_inode(dir, res.dir_attr); + if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { + msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; + msg.rpc_argp = fhandle; + msg.rpc_resp = fattr; + status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); + } + nfs_free_fattr(res.dir_attr); + dprintk("NFS reply lookup: %d\n", status); + return status; +} + +static int +nfs3_proc_lookup(struct inode *dir, struct dentry *dentry, + struct nfs_fh *fhandle, struct nfs_fattr *fattr) +{ + unsigned short task_flags = 0; + + /* Is this is an attribute revalidation, subject to softreval? */ + if (nfs_lookup_is_soft_revalidate(dentry)) + task_flags |= RPC_TASK_TIMEOUT; + + dprintk("NFS call lookup %pd2\n", dentry); + return __nfs3_proc_lookup(dir, dentry->d_name.name, + dentry->d_name.len, fhandle, fattr, + task_flags); +} + +static int nfs3_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, + struct nfs_fattr *fattr) +{ + const char dotdot[] = ".."; + const size_t len = strlen(dotdot); + unsigned short task_flags = 0; + + if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) + task_flags |= RPC_TASK_TIMEOUT; + + return __nfs3_proc_lookup(inode, dotdot, len, fhandle, fattr, + task_flags); +} + +static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry, + const struct cred *cred) +{ + struct nfs3_accessargs arg = { + .fh = NFS_FH(inode), + .access = entry->mask, + }; + struct nfs3_accessres res; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], + .rpc_argp = &arg, + .rpc_resp = &res, + .rpc_cred = cred, + }; + int status = -ENOMEM; + + dprintk("NFS call access\n"); + res.fattr = nfs_alloc_fattr(); + if (res.fattr == NULL) + goto out; + + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); + nfs_refresh_inode(inode, res.fattr); + if (status == 0) + nfs_access_set_mask(entry, res.access); + nfs_free_fattr(res.fattr); +out: + dprintk("NFS reply access: %d\n", status); + return status; +} + +static int nfs3_proc_readlink(struct inode *inode, struct page *page, + unsigned int pgbase, unsigned int pglen) +{ + struct nfs_fattr *fattr; + struct nfs3_readlinkargs args = { + .fh = NFS_FH(inode), + .pgbase = pgbase, + .pglen = pglen, + .pages = &page + }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], + .rpc_argp = &args, + }; + int status = -ENOMEM; + + dprintk("NFS call readlink\n"); + fattr = nfs_alloc_fattr(); + if (fattr == NULL) + goto out; + msg.rpc_resp = fattr; + + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); + nfs_refresh_inode(inode, fattr); + nfs_free_fattr(fattr); +out: + dprintk("NFS reply readlink: %d\n", status); + return status; +} + +struct nfs3_createdata { + struct rpc_message msg; + union { + struct nfs3_createargs create; + struct nfs3_mkdirargs mkdir; + struct nfs3_symlinkargs symlink; + struct nfs3_mknodargs mknod; + } arg; + struct nfs3_diropres res; + struct nfs_fh fh; + struct nfs_fattr fattr; + struct nfs_fattr dir_attr; +}; + +static struct nfs3_createdata *nfs3_alloc_createdata(void) +{ + struct nfs3_createdata *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data != NULL) { + data->msg.rpc_argp = &data->arg; + data->msg.rpc_resp = &data->res; + data->res.fh = &data->fh; + data->res.fattr = &data->fattr; + data->res.dir_attr = &data->dir_attr; + nfs_fattr_init(data->res.fattr); + nfs_fattr_init(data->res.dir_attr); + } + return data; +} + +static struct dentry * +nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) +{ + int status; + + status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); + nfs_post_op_update_inode(dir, data->res.dir_attr); + if (status != 0) + return ERR_PTR(status); + + return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr); +} + +static void nfs3_free_createdata(struct nfs3_createdata *data) +{ + kfree(data); +} + +/* + * Create a regular file. + */ +static int +nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, + int flags) +{ + struct posix_acl *default_acl, *acl; + struct nfs3_createdata *data; + struct dentry *d_alias; + int status = -ENOMEM; + + dprintk("NFS call create %pd\n", dentry); + + data = nfs3_alloc_createdata(); + if (data == NULL) + goto out; + + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; + data->arg.create.fh = NFS_FH(dir); + data->arg.create.name = dentry->d_name.name; + data->arg.create.len = dentry->d_name.len; + data->arg.create.sattr = sattr; + + data->arg.create.createmode = NFS3_CREATE_UNCHECKED; + if (flags & O_EXCL) { + data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; + data->arg.create.verifier[0] = cpu_to_be32(jiffies); + data->arg.create.verifier[1] = cpu_to_be32(current->pid); + } + + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; + + for (;;) { + d_alias = nfs3_do_create(dir, dentry, data); + status = PTR_ERR_OR_ZERO(d_alias); + + if (status != -ENOTSUPP) + break; + /* If the server doesn't support the exclusive creation + * semantics, try again with simple 'guarded' mode. */ + switch (data->arg.create.createmode) { + case NFS3_CREATE_EXCLUSIVE: + data->arg.create.createmode = NFS3_CREATE_GUARDED; + break; + + case NFS3_CREATE_GUARDED: + data->arg.create.createmode = NFS3_CREATE_UNCHECKED; + break; + + case NFS3_CREATE_UNCHECKED: + goto out_release_acls; + } + nfs_fattr_init(data->res.dir_attr); + nfs_fattr_init(data->res.fattr); + } + + if (status != 0) + goto out_release_acls; + + if (d_alias) + dentry = d_alias; + + /* When we created the file with exclusive semantics, make + * sure we set the attributes afterwards. */ + if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { + dprintk("NFS call setattr (post-create)\n"); + + if (!(sattr->ia_valid & ATTR_ATIME_SET)) + sattr->ia_valid |= ATTR_ATIME; + if (!(sattr->ia_valid & ATTR_MTIME_SET)) + sattr->ia_valid |= ATTR_MTIME; + + /* Note: we could use a guarded setattr here, but I'm + * not sure this buys us anything (and I'd have + * to revamp the NFSv3 XDR code) */ + status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); + nfs_post_op_update_inode(d_inode(dentry), data->res.fattr); + dprintk("NFS reply setattr (post-create): %d\n", status); + if (status != 0) + goto out_dput; + } + + status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); + +out_dput: + dput(d_alias); +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); +out: + nfs3_free_createdata(data); + dprintk("NFS reply create: %d\n", status); + return status; +} + +static int +nfs3_proc_remove(struct inode *dir, struct dentry *dentry) +{ + struct nfs_removeargs arg = { + .fh = NFS_FH(dir), + .name = dentry->d_name, + }; + struct nfs_removeres res; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int status = -ENOMEM; + + dprintk("NFS call remove %pd2\n", dentry); + res.dir_attr = nfs_alloc_fattr(); + if (res.dir_attr == NULL) + goto out; + + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + nfs_post_op_update_inode(dir, res.dir_attr); + nfs_free_fattr(res.dir_attr); +out: + dprintk("NFS reply remove: %d\n", status); + return status; +} + +static void +nfs3_proc_unlink_setup(struct rpc_message *msg, + struct dentry *dentry, + struct inode *inode) +{ + msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; +} + +static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) +{ + rpc_call_start(task); +} + +static int +nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) +{ + struct nfs_removeres *res; + if (nfs3_async_handle_jukebox(task, dir)) + return 0; + res = task->tk_msg.rpc_resp; + nfs_post_op_update_inode(dir, res->dir_attr); + return 1; +} + +static void +nfs3_proc_rename_setup(struct rpc_message *msg, + struct dentry *old_dentry, + struct dentry *new_dentry) +{ + msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; +} + +static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) +{ + rpc_call_start(task); +} + +static int +nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, + struct inode *new_dir) +{ + struct nfs_renameres *res; + + if (nfs3_async_handle_jukebox(task, old_dir)) + return 0; + res = task->tk_msg.rpc_resp; + + nfs_post_op_update_inode(old_dir, res->old_fattr); + nfs_post_op_update_inode(new_dir, res->new_fattr); + return 1; +} + +static int +nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) +{ + struct nfs3_linkargs arg = { + .fromfh = NFS_FH(inode), + .tofh = NFS_FH(dir), + .toname = name->name, + .tolen = name->len + }; + struct nfs3_linkres res; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_LINK], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int status = -ENOMEM; + + dprintk("NFS call link %s\n", name->name); + res.fattr = nfs_alloc_fattr(); + res.dir_attr = nfs_alloc_fattr(); + if (res.fattr == NULL || res.dir_attr == NULL) + goto out; + + status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); + nfs_post_op_update_inode(dir, res.dir_attr); + nfs_post_op_update_inode(inode, res.fattr); +out: + nfs_free_fattr(res.dir_attr); + nfs_free_fattr(res.fattr); + dprintk("NFS reply link: %d\n", status); + return status; +} + +static int +nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, + unsigned int len, struct iattr *sattr) +{ + struct nfs3_createdata *data; + struct dentry *d_alias; + int status = -ENOMEM; + + if (len > NFS3_MAXPATHLEN) + return -ENAMETOOLONG; + + dprintk("NFS call symlink %pd\n", dentry); + + data = nfs3_alloc_createdata(); + if (data == NULL) + goto out; + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; + data->arg.symlink.fromfh = NFS_FH(dir); + data->arg.symlink.fromname = dentry->d_name.name; + data->arg.symlink.fromlen = dentry->d_name.len; + data->arg.symlink.pages = &page; + data->arg.symlink.pathlen = len; + data->arg.symlink.sattr = sattr; + + d_alias = nfs3_do_create(dir, dentry, data); + status = PTR_ERR_OR_ZERO(d_alias); + + if (status == 0) + dput(d_alias); + + nfs3_free_createdata(data); +out: + dprintk("NFS reply symlink: %d\n", status); + return status; +} + +static int +nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) +{ + struct posix_acl *default_acl, *acl; + struct nfs3_createdata *data; + struct dentry *d_alias; + int status = -ENOMEM; + + dprintk("NFS call mkdir %pd\n", dentry); + + data = nfs3_alloc_createdata(); + if (data == NULL) + goto out; + + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; + + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; + data->arg.mkdir.fh = NFS_FH(dir); + data->arg.mkdir.name = dentry->d_name.name; + data->arg.mkdir.len = dentry->d_name.len; + data->arg.mkdir.sattr = sattr; + + d_alias = nfs3_do_create(dir, dentry, data); + status = PTR_ERR_OR_ZERO(d_alias); + + if (status != 0) + goto out_release_acls; + + if (d_alias) + dentry = d_alias; + + status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); + + dput(d_alias); +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); +out: + nfs3_free_createdata(data); + dprintk("NFS reply mkdir: %d\n", status); + return status; +} + +static int +nfs3_proc_rmdir(struct inode *dir, const struct qstr *name) +{ + struct nfs_fattr *dir_attr; + struct nfs3_diropargs arg = { + .fh = NFS_FH(dir), + .name = name->name, + .len = name->len + }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], + .rpc_argp = &arg, + }; + int status = -ENOMEM; + + dprintk("NFS call rmdir %s\n", name->name); + dir_attr = nfs_alloc_fattr(); + if (dir_attr == NULL) + goto out; + + msg.rpc_resp = dir_attr; + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + nfs_post_op_update_inode(dir, dir_attr); + nfs_free_fattr(dir_attr); +out: + dprintk("NFS reply rmdir: %d\n", status); + return status; +} + +/* + * The READDIR implementation is somewhat hackish - we pass the user buffer + * to the encode function, which installs it in the receive iovec. + * The decode function itself doesn't perform any decoding, it just makes + * sure the reply is syntactically correct. + * + * Also note that this implementation handles both plain readdir and + * readdirplus. + */ +static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg, + struct nfs_readdir_res *nr_res) +{ + struct inode *dir = d_inode(nr_arg->dentry); + struct nfs3_readdirargs arg = { + .fh = NFS_FH(dir), + .cookie = nr_arg->cookie, + .plus = nr_arg->plus, + .count = nr_arg->page_len, + .pages = nr_arg->pages + }; + struct nfs3_readdirres res = { + .verf = nr_res->verf, + .plus = nr_arg->plus, + }; + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], + .rpc_argp = &arg, + .rpc_resp = &res, + .rpc_cred = nr_arg->cred, + }; + int status = -ENOMEM; + + if (nr_arg->plus) + msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; + if (arg.cookie) + memcpy(arg.verf, nr_arg->verf, sizeof(arg.verf)); + + dprintk("NFS call readdir%s %llu\n", nr_arg->plus ? "plus" : "", + (unsigned long long)nr_arg->cookie); + + res.dir_attr = nfs_alloc_fattr(); + if (res.dir_attr == NULL) + goto out; + + status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); + + nfs_invalidate_atime(dir); + nfs_refresh_inode(dir, res.dir_attr); + + nfs_free_fattr(res.dir_attr); +out: + dprintk("NFS reply readdir%s: %d\n", nr_arg->plus ? "plus" : "", + status); + return status; +} + +static int +nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, + dev_t rdev) +{ + struct posix_acl *default_acl, *acl; + struct nfs3_createdata *data; + struct dentry *d_alias; + int status = -ENOMEM; + + dprintk("NFS call mknod %pd %u:%u\n", dentry, + MAJOR(rdev), MINOR(rdev)); + + data = nfs3_alloc_createdata(); + if (data == NULL) + goto out; + + status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); + if (status) + goto out; + + data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; + data->arg.mknod.fh = NFS_FH(dir); + data->arg.mknod.name = dentry->d_name.name; + data->arg.mknod.len = dentry->d_name.len; + data->arg.mknod.sattr = sattr; + data->arg.mknod.rdev = rdev; + + switch (sattr->ia_mode & S_IFMT) { + case S_IFBLK: + data->arg.mknod.type = NF3BLK; + break; + case S_IFCHR: + data->arg.mknod.type = NF3CHR; + break; + case S_IFIFO: + data->arg.mknod.type = NF3FIFO; + break; + case S_IFSOCK: + data->arg.mknod.type = NF3SOCK; + break; + default: + status = -EINVAL; + goto out_release_acls; + } + + d_alias = nfs3_do_create(dir, dentry, data); + status = PTR_ERR_OR_ZERO(d_alias); + if (status != 0) + goto out_release_acls; + + if (d_alias) + dentry = d_alias; + + status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); + + dput(d_alias); +out_release_acls: + posix_acl_release(acl); + posix_acl_release(default_acl); +out: + nfs3_free_createdata(data); + dprintk("NFS reply mknod: %d\n", status); + return status; +} + +static int +nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsstat *stat) +{ + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], + .rpc_argp = fhandle, + .rpc_resp = stat, + }; + int status; + + dprintk("NFS call fsstat\n"); + nfs_fattr_init(stat->fattr); + status = rpc_call_sync(server->client, &msg, 0); + dprintk("NFS reply fsstat: %d\n", status); + return status; +} + +static int +do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], + .rpc_argp = fhandle, + .rpc_resp = info, + }; + int status; + + dprintk("NFS call fsinfo\n"); + nfs_fattr_init(info->fattr); + status = rpc_call_sync(client, &msg, 0); + dprintk("NFS reply fsinfo: %d\n", status); + return status; +} + +/* + * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via + * nfs_create_server + */ +static int +nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_fsinfo *info) +{ + int status; + + status = do_proc_fsinfo(server->client, fhandle, info); + if (status && server->nfs_client->cl_rpcclient != server->client) + status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); + return status; +} + +static int +nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, + struct nfs_pathconf *info) +{ + struct rpc_message msg = { + .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], + .rpc_argp = fhandle, + .rpc_resp = info, + }; + int status; + + dprintk("NFS call pathconf\n"); + nfs_fattr_init(info->fattr); + status = rpc_call_sync(server->client, &msg, 0); + dprintk("NFS reply pathconf: %d\n", status); + return status; +} + +static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) +{ + struct inode *inode = hdr->inode; + struct nfs_server *server = NFS_SERVER(inode); + + if (hdr->pgio_done_cb != NULL) + return hdr->pgio_done_cb(task, hdr); + + if (nfs3_async_handle_jukebox(task, inode)) + return -EAGAIN; + + if (task->tk_status >= 0 && !server->read_hdrsize) + cmpxchg(&server->read_hdrsize, 0, hdr->res.replen); + + nfs_invalidate_atime(inode); + nfs_refresh_inode(inode, &hdr->fattr); + return 0; +} + +static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr, + struct rpc_message *msg) +{ + msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; + hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize; +} + +static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, + struct nfs_pgio_header *hdr) +{ + rpc_call_start(task); + return 0; +} + +static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) +{ + struct inode *inode = hdr->inode; + + if (hdr->pgio_done_cb != NULL) + return hdr->pgio_done_cb(task, hdr); + + if (nfs3_async_handle_jukebox(task, inode)) + return -EAGAIN; + if (task->tk_status >= 0) + nfs_writeback_update_inode(hdr); + return 0; +} + +static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr, + struct rpc_message *msg, + struct rpc_clnt **clnt) +{ + msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; +} + +static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) +{ + rpc_call_start(task); +} + +static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) +{ + if (data->commit_done_cb != NULL) + return data->commit_done_cb(task, data); + + if (nfs3_async_handle_jukebox(task, data->inode)) + return -EAGAIN; + nfs_refresh_inode(data->inode, data->res.fattr); + return 0; +} + +static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, + struct rpc_clnt **clnt) +{ + msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; +} + +static void nfs3_nlm_alloc_call(void *data) +{ + struct nfs_lock_context *l_ctx = data; + if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { + get_nfs_open_context(l_ctx->open_context); + nfs_get_lock_context(l_ctx->open_context); + } +} + +static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data) +{ + struct nfs_lock_context *l_ctx = data; + if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) + return nfs_async_iocounter_wait(task, l_ctx); + return false; + +} + +static void nfs3_nlm_release_call(void *data) +{ + struct nfs_lock_context *l_ctx = data; + struct nfs_open_context *ctx; + if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { + ctx = l_ctx->open_context; + nfs_put_lock_context(l_ctx); + put_nfs_open_context(ctx); + } +} + +static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = { + .nlmclnt_alloc_call = nfs3_nlm_alloc_call, + .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare, + .nlmclnt_release_call = nfs3_nlm_release_call, +}; + +static int +nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) +{ + struct inode *inode = file_inode(filp); + struct nfs_lock_context *l_ctx = NULL; + struct nfs_open_context *ctx = nfs_file_open_context(filp); + int status; + + if (fl->fl_flags & FL_CLOSE) { + l_ctx = nfs_get_lock_context(ctx); + if (IS_ERR(l_ctx)) + l_ctx = NULL; + else + set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); + } + + status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx); + + if (l_ctx) + nfs_put_lock_context(l_ctx); + + return status; +} + +static int nfs3_have_delegation(struct inode *inode, fmode_t flags) +{ + return 0; +} + +static const struct inode_operations nfs3_dir_inode_operations = { + .create = nfs_create, + .lookup = nfs_lookup, + .link = nfs_link, + .unlink = nfs_unlink, + .symlink = nfs_symlink, + .mkdir = nfs_mkdir, + .rmdir = nfs_rmdir, + .mknod = nfs_mknod, + .rename = nfs_rename, + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +#ifdef CONFIG_NFS_V3_ACL + .listxattr = nfs3_listxattr, + .get_inode_acl = nfs3_get_acl, + .set_acl = nfs3_set_acl, +#endif +}; + +static const struct inode_operations nfs3_file_inode_operations = { + .permission = nfs_permission, + .getattr = nfs_getattr, + .setattr = nfs_setattr, +#ifdef CONFIG_NFS_V3_ACL + .listxattr = nfs3_listxattr, + .get_inode_acl = nfs3_get_acl, + .set_acl = nfs3_set_acl, +#endif +}; + +const struct nfs_rpc_ops nfs_v3_clientops = { + .version = 3, /* protocol version */ + .dentry_ops = &nfs_dentry_operations, + .dir_inode_ops = &nfs3_dir_inode_operations, + .file_inode_ops = &nfs3_file_inode_operations, + .file_ops = &nfs_file_operations, + .nlmclnt_ops = &nlmclnt_fl_close_lock_ops, + .getroot = nfs3_proc_get_root, + .submount = nfs_submount, + .try_get_tree = nfs_try_get_tree, + .getattr = nfs3_proc_getattr, + .setattr = nfs3_proc_setattr, + .lookup = nfs3_proc_lookup, + .lookupp = nfs3_proc_lookupp, + .access = nfs3_proc_access, + .readlink = nfs3_proc_readlink, + .create = nfs3_proc_create, + .remove = nfs3_proc_remove, + .unlink_setup = nfs3_proc_unlink_setup, + .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, + .unlink_done = nfs3_proc_unlink_done, + .rename_setup = nfs3_proc_rename_setup, + .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, + .rename_done = nfs3_proc_rename_done, + .link = nfs3_proc_link, + .symlink = nfs3_proc_symlink, + .mkdir = nfs3_proc_mkdir, + .rmdir = nfs3_proc_rmdir, + .readdir = nfs3_proc_readdir, + .mknod = nfs3_proc_mknod, + .statfs = nfs3_proc_statfs, + .fsinfo = nfs3_proc_fsinfo, + .pathconf = nfs3_proc_pathconf, + .decode_dirent = nfs3_decode_dirent, + .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, + .read_setup = nfs3_proc_read_setup, + .read_done = nfs3_read_done, + .write_setup = nfs3_proc_write_setup, + .write_done = nfs3_write_done, + .commit_setup = nfs3_proc_commit_setup, + .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, + .commit_done = nfs3_commit_done, + .lock = nfs3_proc_lock, + .clear_acl_cache = forget_all_cached_acls, + .close_context = nfs_close_context, + .have_delegation = nfs3_have_delegation, + .alloc_client = nfs_alloc_client, + .init_client = nfs_init_client, + .free_client = nfs_free_client, + .create_server = nfs3_create_server, + .clone_server = nfs3_clone_server, +}; 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