/* * linux/fs/nfs/callback.h * * Copyright (C) 2004 Trond Myklebust * * NFSv4 callback definitions */ #ifndef __LINUX_FS_NFS_CALLBACK_H #define __LINUX_FS_NFS_CALLBACK_H #include #define NFS4_CALLBACK 0x40000000 #define NFS4_CALLBACK_XDRSIZE 2048 #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE) enum nfs4_callback_procnum { CB_NULL = 0, CB_COMPOUND = 1, }; enum nfs4_callback_opnum { OP_CB_GETATTR = 3, OP_CB_RECALL = 4, /* Callback operations new to NFSv4.1 */ OP_CB_LAYOUTRECALL = 5, OP_CB_NOTIFY = 6, OP_CB_PUSH_DELEG = 7, OP_CB_RECALL_ANY = 8, OP_CB_RECALLABLE_OBJ_AVAIL = 9, OP_CB_RECALL_SLOT = 10, OP_CB_SEQUENCE = 11, OP_CB_WANTS_CANCELLED = 12, OP_CB_NOTIFY_LOCK = 13, OP_CB_NOTIFY_DEVICEID = 14, /* Callback operations new to NFSv4.2 */ OP_CB_OFFLOAD = 15, OP_CB_ILLEGAL = 10044, }; struct nfs4_slot; struct cb_process_state { __be32 drc_status; struct nfs_client *clp; struct nfs4_slot *slot; u32 minorversion; struct net *net; }; struct cb_compound_hdr_arg { unsigned int taglen; const char *tag; unsigned int minorversion; unsigned int cb_ident; /* v4.0 callback identifier */ unsigned nops; }; struct cb_compound_hdr_res { __be32 *status; unsigned int taglen; const char *tag; __be32 *nops; }; struct cb_getattrargs { struct nfs_fh fh; uint32_t bitmap[2]; }; struct cb_getattrres { __be32 status; uint32_t bitmap[2]; uint64_t size; uint64_t change_attr; struct timespec ctime; struct timespec mtime; }; struct cb_recallargs { struct nfs_fh fh; nfs4_stateid stateid; uint32_t truncate; }; #if defined(CONFIG_NFS_V4_1) struct referring_call { uint32_t rc_sequenceid; uint32_t rc_slotid; }; struct referring_call_list { struct nfs4_sessionid rcl_sessionid; uint32_t rcl_nrefcalls; struct referring_call *rcl_refcalls; }; struct cb_sequenceargs { struct sockaddr *csa_addr; struct nfs4_sessionid csa_sessionid; uint32_t csa_sequenceid; uint32_t csa_slotid; uint32_t csa_highestslotid; uint32_t csa_cachethis; uint32_t csa_nrclists; struct referring_call_list *csa_rclists; }; struct cb_sequenceres { __be32 csr_status; struct nfs4_sessionid csr_sessionid; uint32_t csr_sequenceid; uint32_t csr_slotid; uint32_t csr_highestslotid; uint32_t csr_target_highestslotid; }; extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, struct cb_sequenceres *res, struct cb_process_state *cps); #define RCA4_TYPE_MASK_RDATA_DLG 0 #define RCA4_TYPE_MASK_WDATA_DLG 1 #define RCA4_TYPE_MASK_DIR_DLG 2 #define RCA4_TYPE_MASK_FILE_LAYOUT 3 #define RCA4_TYPE_MASK_BLK_LAYOUT 4 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 #define RCA4_TYPE_MASK_ALL 0xf31f struct cb_recallanyargs { uint32_t craa_objs_to_keep; uint32_t craa_type_mask; }; extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, struct cb_process_state *cps); struct cb_recallslotargs { uint32_t crsa_target_highest_slotid; }; extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, struct cb_process_state *cps); struct cb_layoutrecallargs { uint32_t cbl_recall_type; uint32_t cbl_layout_type; uint32_t cbl_layoutchanged; union { struct { struct nfs_fh cbl_fh; struct pnfs_layout_range cbl_range; nfs4_stateid cbl_stateid; }; struct nfs_fsid cbl_fsid; }; }; extern __be32 nfs4_callback_layoutrecall( struct cb_layoutrecallargs *args, void *dummy, struct cb_process_state *cps); struct cb_devicenotifyitem { uint32_t cbd_notify_type; uint32_t cbd_layout_type; struct nfs4_deviceid cbd_dev_id; uint32_t cbd_immediate; }; struct cb_devicenotifyargs { int ndevs; struct cb_devicenotifyitem *devs; }; extern __be32 nfs4_callback_devicenotify( struct cb_devicenotifyargs *args, void *dummy, struct cb_process_state *cps); struct cb_notify_lock_args { struct nfs_fh cbnl_fh; struct nfs_lowner cbnl_owner; bool cbnl_valid; }; extern __be32 nfs4_callback_notify_lock(struct cb_notify_lock_args *args, void *dummy, struct cb_process_state *cps); #endif /* CONFIG_NFS_V4_1 */ extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res, struct cb_process_state *cps); extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, struct cb_process_state *cps); #if IS_ENABLED(CONFIG_NFS_V4) extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); extern void nfs_callback_down(int minorversion, struct net *net); #endif /* CONFIG_NFS_V4 */ /* * nfs41: Callbacks are expected to not cause substantial latency, * so we limit their concurrency to 1 by setting up the maximum number * of slots for the backchannel. */ #define NFS41_BC_MIN_CALLBACKS 1 #define NFS41_BC_MAX_CALLBACKS 1 #define NFS4_MIN_NR_CALLBACK_THREADS 1 extern unsigned int nfs_callback_set_tcpport; extern unsigned short nfs_callback_nr_threads; #endif /* __LINUX_FS_NFS_CALLBACK_H */ linux/net-next.git/tree/include/net/caif?id=54791b276b4000b307339f269d3bf7db877d536f'>include/net/caif parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/caif')