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![Linus Torvalds](/assets/img/avatar_default.png)
Highlights include: Stable fixes: - SUNRPC: Ensure bvecs are re-synced when we re-encode the RPC request - Fix an Oops in ff_layout_track_ds_error due to a PTR_ERR() dereference - Revert buggy NFS readdirplus optimisation - NFSv4: Handle the special Linux file open access mode - pnfs: Fix a problem where we gratuitously start doing I/O through the MDS Features: - Allow NFS client to set up multiple TCP connections to the server using a new 'nconnect=X' mount option. Queue length is used to balance load. - Enhance statistics reporting to report on all transports when using multiple connections. - Speed up SUNRPC by removing bh-safe spinlocks - Add a mechanism to allow NFSv4 to request that containers set a unique per-host identifier for when the hostname is not set. - Ensure NFSv4 updates the lease_time after a clientid update Bugfixes and cleanup: - Fix use-after-free in rpcrdma_post_recvs - Fix a memory leak when nfs_match_client() is interrupted - Fix buggy file access checking in NFSv4 open for execute - disable unsupported client side deduplication - Fix spurious client disconnections - Fix occasional RDMA transport deadlock - Various RDMA cleanups - Various tracepoint fixes - Fix the TCP callback channel to guarantee the server can actually send the number of callback requests that was negotiated at mount time. -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEESQctxSBg8JpV8KqEZwvnipYKAPIFAl0wz/EACgkQZwvnipYK APJUrQ/9FpbWTaI/H0BkBf+/iIDAwuGozldDDRkHpHvykvcbNSFPNk5CA4fV/lCq rI0tD9ijj0KJhAjS1RWLb9oXMUm/MDIIcZNvsbOiIfGftzGnxAz022KS2JyV+Xk6 ul7sCQ8QmbQJzfZk+aFZxl5slS9i5nM+Sa//k5SK3JghOlLuYkW50OlmE6ME8rKP sLWD2quLh1J5mjG+B9ml4YWozNi0elFN6ZqdzO/SjIhIG7rn2Hkr0glWcEprdiS7 qHoF6dIn80oR37YNrcbBtEGqBnMnWkpGAGq2Hgf5I2YtO+xfEgMqqs9FNIcahtQG SGa1bnpcys9+fG4fnwzgOgYkvGzKdi/bIYc8lhBowl+76z+6VgjwlwT3wRtnWfO9 288LZDMMfOSYoDkbA9iGtoQRviIsoGMoeH/r5tZe7U1W35h60NGPVhH9sP9/Gc2s Va1xBYK6PaIg+UxeghJmCnNK3zANyEI7AtDVvn0wsJuDcgXO5/PAANenc6/Fl6nf U9XB4wmgaM2jN5uqLYT3bJAaAPAXTOayVnnd9oDYb87/31sYM6iwzSPkmm5+qIsi 0Ftks4PSjpjTTrmUvs3CL+ll3Y9bWUd58qlooGwi6u1DnXDQDzbIoRQBezNFJ+Lc MahUVY7w9ATyJFJRvbscO7mRS8qTmr4qP91bAOsYQ0P2Yo02L7k= =eR7d -----END PGP SIGNATURE----- Merge tag 'nfs-for-5.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs Pull NFS client updates from Trond Myklebust: "Highlights include: Stable fixes: - SUNRPC: Ensure bvecs are re-synced when we re-encode the RPC request - Fix an Oops in ff_layout_track_ds_error due to a PTR_ERR() dereference - Revert buggy NFS readdirplus optimisation - NFSv4: Handle the special Linux file open access mode - pnfs: Fix a problem where we gratuitously start doing I/O through the MDS Features: - Allow NFS client to set up multiple TCP connections to the server using a new 'nconnect=X' mount option. Queue length is used to balance load. - Enhance statistics reporting to report on all transports when using multiple connections. - Speed up SUNRPC by removing bh-safe spinlocks - Add a mechanism to allow NFSv4 to request that containers set a unique per-host identifier for when the hostname is not set. - Ensure NFSv4 updates the lease_time after a clientid update Bugfixes and cleanup: - Fix use-after-free in rpcrdma_post_recvs - Fix a memory leak when nfs_match_client() is interrupted - Fix buggy file access checking in NFSv4 open for execute - disable unsupported client side deduplication - Fix spurious client disconnections - Fix occasional RDMA transport deadlock - Various RDMA cleanups - Various tracepoint fixes - Fix the TCP callback channel to guarantee the server can actually send the number of callback requests that was negotiated at mount time" * tag 'nfs-for-5.3-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (68 commits) pnfs/flexfiles: Add tracepoints for detecting pnfs fallback to MDS pnfs: Fix a problem where we gratuitously start doing I/O through the MDS SUNRPC: Optimise transport balancing code SUNRPC: Ensure the bvecs are reset when we re-encode the RPC request pnfs/flexfiles: Fix PTR_ERR() dereferences in ff_layout_track_ds_error NFSv4: Don't use the zero stateid with layoutget SUNRPC: Fix up backchannel slot table accounting SUNRPC: Fix initialisation of struct rpc_xprt_switch SUNRPC: Skip zero-refcount transports SUNRPC: Replace division by multiplication in calculation of queue length NFSv4: Validate the stateid before applying it to state recovery nfs4.0: Refetch lease_time after clientid update nfs4: Rename nfs41_setup_state_renewal nfs4: Make nfs4_proc_get_lease_time available for nfs4.0 nfs: Fix copy-and-paste error in debug message NFS: Replace 16 seq_printf() calls by seq_puts() NFS: Use seq_putc() in nfs_show_stats() Revert "NFS: readdirplus optimization by cache mechanism" (memleak) SUNRPC: Fix transport accounting when caller specifies an rpc_xprt NFS: Record task, client ID, and XID in xdr_status trace points ...
324 lines
7.2 KiB
C
324 lines
7.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* debugfs interface for sunrpc
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*
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* (c) 2014 Jeff Layton <jlayton@primarydata.com>
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*/
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#include <linux/debugfs.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/clnt.h>
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#include "netns.h"
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static struct dentry *topdir;
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static struct dentry *rpc_clnt_dir;
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static struct dentry *rpc_xprt_dir;
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unsigned int rpc_inject_disconnect;
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static int
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tasks_show(struct seq_file *f, void *v)
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{
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u32 xid = 0;
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struct rpc_task *task = v;
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struct rpc_clnt *clnt = task->tk_client;
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const char *rpc_waitq = "none";
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if (RPC_IS_QUEUED(task))
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rpc_waitq = rpc_qname(task->tk_waitqueue);
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if (task->tk_rqstp)
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xid = be32_to_cpu(task->tk_rqstp->rq_xid);
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seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
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task->tk_pid, task->tk_flags, task->tk_status,
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clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops,
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clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),
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task->tk_action, rpc_waitq);
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return 0;
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}
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static void *
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tasks_start(struct seq_file *f, loff_t *ppos)
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__acquires(&clnt->cl_lock)
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{
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struct rpc_clnt *clnt = f->private;
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loff_t pos = *ppos;
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struct rpc_task *task;
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spin_lock(&clnt->cl_lock);
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list_for_each_entry(task, &clnt->cl_tasks, tk_task)
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if (pos-- == 0)
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return task;
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return NULL;
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}
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static void *
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tasks_next(struct seq_file *f, void *v, loff_t *pos)
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{
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struct rpc_clnt *clnt = f->private;
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struct rpc_task *task = v;
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struct list_head *next = task->tk_task.next;
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++*pos;
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/* If there's another task on list, return it */
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if (next == &clnt->cl_tasks)
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return NULL;
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return list_entry(next, struct rpc_task, tk_task);
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}
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static void
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tasks_stop(struct seq_file *f, void *v)
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__releases(&clnt->cl_lock)
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{
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struct rpc_clnt *clnt = f->private;
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spin_unlock(&clnt->cl_lock);
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}
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static const struct seq_operations tasks_seq_operations = {
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.start = tasks_start,
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.next = tasks_next,
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.stop = tasks_stop,
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.show = tasks_show,
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};
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static int tasks_open(struct inode *inode, struct file *filp)
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{
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int ret = seq_open(filp, &tasks_seq_operations);
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if (!ret) {
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struct seq_file *seq = filp->private_data;
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struct rpc_clnt *clnt = seq->private = inode->i_private;
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if (!atomic_inc_not_zero(&clnt->cl_count)) {
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seq_release(inode, filp);
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ret = -EINVAL;
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}
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}
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return ret;
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}
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static int
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tasks_release(struct inode *inode, struct file *filp)
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{
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struct seq_file *seq = filp->private_data;
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struct rpc_clnt *clnt = seq->private;
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rpc_release_client(clnt);
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return seq_release(inode, filp);
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}
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static const struct file_operations tasks_fops = {
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.owner = THIS_MODULE,
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.open = tasks_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = tasks_release,
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};
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static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *numv)
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{
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int len;
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char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
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char link[9]; /* enough for 8 hex digits + NULL */
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int *nump = numv;
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if (IS_ERR_OR_NULL(xprt->debugfs))
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return 0;
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len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
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xprt->debugfs->d_name.name);
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if (len > sizeof(name))
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return -1;
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if (*nump == 0)
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strcpy(link, "xprt");
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else {
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len = snprintf(link, sizeof(link), "xprt%d", *nump);
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if (len > sizeof(link))
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return -1;
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}
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debugfs_create_symlink(link, clnt->cl_debugfs, name);
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(*nump)++;
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return 0;
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}
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void
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rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
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{
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int len;
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char name[9]; /* enough for 8 hex digits + NULL */
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int xprtnum = 0;
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len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
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if (len >= sizeof(name))
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return;
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/* make the per-client dir */
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clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
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/* make tasks file */
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debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs, clnt,
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&tasks_fops);
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rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum);
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}
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void
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rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
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{
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debugfs_remove_recursive(clnt->cl_debugfs);
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clnt->cl_debugfs = NULL;
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}
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static int
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xprt_info_show(struct seq_file *f, void *v)
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{
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struct rpc_xprt *xprt = f->private;
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seq_printf(f, "netid: %s\n", xprt->address_strings[RPC_DISPLAY_NETID]);
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seq_printf(f, "addr: %s\n", xprt->address_strings[RPC_DISPLAY_ADDR]);
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seq_printf(f, "port: %s\n", xprt->address_strings[RPC_DISPLAY_PORT]);
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seq_printf(f, "state: 0x%lx\n", xprt->state);
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return 0;
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}
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static int
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xprt_info_open(struct inode *inode, struct file *filp)
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{
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int ret;
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struct rpc_xprt *xprt = inode->i_private;
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ret = single_open(filp, xprt_info_show, xprt);
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if (!ret) {
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if (!xprt_get(xprt)) {
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single_release(inode, filp);
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ret = -EINVAL;
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}
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}
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return ret;
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}
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static int
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xprt_info_release(struct inode *inode, struct file *filp)
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{
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struct rpc_xprt *xprt = inode->i_private;
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xprt_put(xprt);
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return single_release(inode, filp);
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}
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static const struct file_operations xprt_info_fops = {
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.owner = THIS_MODULE,
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.open = xprt_info_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = xprt_info_release,
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};
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void
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rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
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{
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int len, id;
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static atomic_t cur_id;
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char name[9]; /* 8 hex digits + NULL term */
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id = (unsigned int)atomic_inc_return(&cur_id);
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len = snprintf(name, sizeof(name), "%x", id);
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if (len >= sizeof(name))
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return;
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/* make the per-client dir */
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xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
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/* make tasks file */
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debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs, xprt,
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&xprt_info_fops);
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atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
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}
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void
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rpc_xprt_debugfs_unregister(struct rpc_xprt *xprt)
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{
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debugfs_remove_recursive(xprt->debugfs);
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xprt->debugfs = NULL;
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}
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static int
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fault_open(struct inode *inode, struct file *filp)
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{
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filp->private_data = kmalloc(128, GFP_KERNEL);
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if (!filp->private_data)
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return -ENOMEM;
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return 0;
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}
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static int
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fault_release(struct inode *inode, struct file *filp)
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{
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kfree(filp->private_data);
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return 0;
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}
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static ssize_t
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fault_disconnect_read(struct file *filp, char __user *user_buf,
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size_t len, loff_t *offset)
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{
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char *buffer = (char *)filp->private_data;
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size_t size;
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size = sprintf(buffer, "%u\n", rpc_inject_disconnect);
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return simple_read_from_buffer(user_buf, len, offset, buffer, size);
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}
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static ssize_t
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fault_disconnect_write(struct file *filp, const char __user *user_buf,
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size_t len, loff_t *offset)
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{
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char buffer[16];
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if (len >= sizeof(buffer))
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len = sizeof(buffer) - 1;
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if (copy_from_user(buffer, user_buf, len))
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return -EFAULT;
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buffer[len] = '\0';
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if (kstrtouint(buffer, 10, &rpc_inject_disconnect))
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return -EINVAL;
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return len;
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}
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static const struct file_operations fault_disconnect_fops = {
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.owner = THIS_MODULE,
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.open = fault_open,
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.read = fault_disconnect_read,
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.write = fault_disconnect_write,
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.release = fault_release,
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};
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void __exit
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sunrpc_debugfs_exit(void)
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{
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debugfs_remove_recursive(topdir);
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topdir = NULL;
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rpc_clnt_dir = NULL;
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rpc_xprt_dir = NULL;
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}
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void __init
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sunrpc_debugfs_init(void)
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{
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struct dentry *rpc_fault_dir;
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topdir = debugfs_create_dir("sunrpc", NULL);
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rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
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rpc_xprt_dir = debugfs_create_dir("rpc_xprt", topdir);
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rpc_fault_dir = debugfs_create_dir("inject_fault", topdir);
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debugfs_create_file("disconnect", S_IFREG | 0400, rpc_fault_dir, NULL,
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&fault_disconnect_fops);
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}
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