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net/9p/client.c
53 KB
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/* * net/9p/clnt.c * * 9P Client * |
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* Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
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* Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to: * Free Software Foundation * 51 Franklin Street, Fifth Floor * Boston, MA 02111-1301 USA * */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> #include <linux/errno.h> #include <linux/fs.h> |
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#include <linux/poll.h> |
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#include <linux/idr.h> #include <linux/mutex.h> |
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#include <linux/slab.h> |
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#include <linux/sched/signal.h> |
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#include <linux/uaccess.h> |
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#include <linux/uio.h> |
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#include <net/9p/9p.h> |
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#include <linux/parser.h> |
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#include <linux/seq_file.h> |
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#include <net/9p/client.h> |
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#include <net/9p/transport.h> |
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#include "protocol.h" |
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|
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#define CREATE_TRACE_POINTS #include <trace/events/9p.h> |
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/* * Client Option Parsing (code inspired by NFS code) * - a little lazy - parse all client options */ enum { Opt_msize, Opt_trans, Opt_legacy, |
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Opt_version, |
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Opt_err, }; |
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static const match_table_t tokens = { |
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{Opt_msize, "msize=%u"}, {Opt_legacy, "noextend"}, {Opt_trans, "trans=%s"}, |
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{Opt_version, "version=%s"}, |
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{Opt_err, NULL}, }; |
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inline int p9_is_proto_dotl(struct p9_client *clnt) { |
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return clnt->proto_version == p9_proto_2000L; |
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} EXPORT_SYMBOL(p9_is_proto_dotl); inline int p9_is_proto_dotu(struct p9_client *clnt) { |
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return clnt->proto_version == p9_proto_2000u; |
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} EXPORT_SYMBOL(p9_is_proto_dotu); |
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int p9_show_client_options(struct seq_file *m, struct p9_client *clnt) { if (clnt->msize != 8192) seq_printf(m, ",msize=%u", clnt->msize); |
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seq_printf(m, ",trans=%s", clnt->trans_mod->name); |
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switch (clnt->proto_version) { case p9_proto_legacy: seq_puts(m, ",noextend"); break; case p9_proto_2000u: seq_puts(m, ",version=9p2000.u"); break; case p9_proto_2000L: /* Default */ break; } if (clnt->trans_mod->show_options) return clnt->trans_mod->show_options(m, clnt); return 0; } EXPORT_SYMBOL(p9_show_client_options); |
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/* * Some error codes are taken directly from the server replies, * make sure they are valid. */ static int safe_errno(int err) { if ((err > 0) || (err < -MAX_ERRNO)) { p9_debug(P9_DEBUG_ERROR, "Invalid error code %d ", err); return -EPROTO; } return err; } |
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/* Interpret mount option for protocol version */ |
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static int get_protocol_version(char *s) |
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{ |
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int version = -EINVAL; |
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if (!strcmp(s, "9p2000")) { |
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version = p9_proto_legacy; |
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p9_debug(P9_DEBUG_9P, "Protocol version: Legacy "); |
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} else if (!strcmp(s, "9p2000.u")) { |
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version = p9_proto_2000u; |
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p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.u "); |
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} else if (!strcmp(s, "9p2000.L")) { |
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version = p9_proto_2000L; |
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p9_debug(P9_DEBUG_9P, "Protocol version: 9P2000.L "); |
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} else |
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pr_info("Unknown protocol version %s ", s); |
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|
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return version; } |
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/** |
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* parse_options - parse mount options into client structure * @opts: options string passed from mount * @clnt: existing v9fs client information |
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* |
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* Return 0 upon success, -ERRNO upon failure |
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*/ |
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static int parse_opts(char *opts, struct p9_client *clnt) |
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{ |
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char *options, *tmp_options; |
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char *p; substring_t args[MAX_OPT_ARGS]; int option; |
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char *s; |
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int ret = 0; |
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|
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clnt->proto_version = p9_proto_2000L; |
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clnt->msize = 8192; |
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if (!opts) return 0; |
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tmp_options = kstrdup(opts, GFP_KERNEL); if (!tmp_options) { |
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p9_debug(P9_DEBUG_ERROR, "failed to allocate copy of option string "); |
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return -ENOMEM; } |
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options = tmp_options; |
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while ((p = strsep(&options, ",")) != NULL) { |
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int token, r; |
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if (!*p) continue; token = match_token(p, tokens, args); |
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switch (token) { case Opt_msize: r = match_int(&args[0], &option); |
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if (r < 0) { |
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p9_debug(P9_DEBUG_ERROR, "integer field, but no integer? "); |
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ret = r; |
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continue; } |
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if (option < 4096) { p9_debug(P9_DEBUG_ERROR, "msize should be at least 4k "); ret = -EINVAL; continue; } |
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clnt->msize = option; break; case Opt_trans: |
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s = match_strdup(&args[0]); if (!s) { ret = -ENOMEM; |
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p9_debug(P9_DEBUG_ERROR, "problem allocating copy of trans arg "); |
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goto free_and_return; } clnt->trans_mod = v9fs_get_trans_by_name(s); if (clnt->trans_mod == NULL) { |
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pr_info("Could not find request transport: %s ", s); |
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ret = -EINVAL; |
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kfree(s); |
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goto free_and_return; } |
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kfree(s); |
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break; case Opt_legacy: |
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clnt->proto_version = p9_proto_legacy; |
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break; |
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case Opt_version: |
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s = match_strdup(&args[0]); if (!s) { ret = -ENOMEM; |
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p9_debug(P9_DEBUG_ERROR, "problem allocating copy of version arg "); |
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goto free_and_return; |
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} ret = get_protocol_version(s); if (ret == -EINVAL) { kfree(s); goto free_and_return; } kfree(s); |
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clnt->proto_version = ret; break; |
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default: continue; } } |
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|
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free_and_return: |
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kfree(tmp_options); |
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return ret; |
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} |
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static struct p9_fcall *p9_fcall_alloc(int alloc_msize) |
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{ struct p9_fcall *fc; fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS); if (!fc) return NULL; fc->capacity = alloc_msize; fc->sdata = (char *) fc + sizeof(struct p9_fcall); return fc; } |
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/** * p9_tag_alloc - lookup/allocate a request by tag * @c: client session to lookup tag within * @tag: numeric id for transaction * * this is a simple array lookup, but will grow the |
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* request_slots as necessary to accommodate transaction |
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* ids which did not previously have a slot. * * this code relies on the client spinlock to manage locks, its * possible we should switch to something else, but I'd rather * stick with something low-overhead for the common case. * */ |
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static struct p9_req_t * p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size) |
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{ unsigned long flags; int row, col; |
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struct p9_req_t *req; |
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int alloc_msize = min(c->msize, max_size); |
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/* This looks up the original request by tag so we know which * buffer to read the data into */ tag++; if (tag >= c->max_tag) { spin_lock_irqsave(&c->lock, flags); /* check again since original check was outside of lock */ while (tag >= c->max_tag) { row = (tag / P9_ROW_MAXTAG); c->reqs[row] = kcalloc(P9_ROW_MAXTAG, sizeof(struct p9_req_t), GFP_ATOMIC); if (!c->reqs[row]) { |
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pr_err("Couldn't grow tag array "); |
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spin_unlock_irqrestore(&c->lock, flags); |
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return ERR_PTR(-ENOMEM); |
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} for (col = 0; col < P9_ROW_MAXTAG; col++) { c->reqs[row][col].status = REQ_STATUS_IDLE; |
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c->reqs[row][col].tc = NULL; |
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} c->max_tag += P9_ROW_MAXTAG; } spin_unlock_irqrestore(&c->lock, flags); } row = tag / P9_ROW_MAXTAG; col = tag % P9_ROW_MAXTAG; |
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req = &c->reqs[row][col]; |
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if (!req->wq) { |
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req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS); |
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if (!req->wq) goto grow_failed; |
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init_waitqueue_head(req->wq); |
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} |
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|
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if (!req->tc) req->tc = p9_fcall_alloc(alloc_msize); if (!req->rc) req->rc = p9_fcall_alloc(alloc_msize); if (!req->tc || !req->rc) goto grow_failed; |
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p9pdu_reset(req->tc); p9pdu_reset(req->rc); |
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req->tc->tag = tag-1; req->status = REQ_STATUS_ALLOC; |
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|
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return req; grow_failed: pr_err("Couldn't grow tag array "); kfree(req->tc); kfree(req->rc); kfree(req->wq); req->tc = req->rc = NULL; req->wq = NULL; return ERR_PTR(-ENOMEM); |
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} |
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/** * p9_tag_lookup - lookup a request by tag * @c: client session to lookup tag within * @tag: numeric id for transaction * */ struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) { int row, col; /* This looks up the original request by tag so we know which * buffer to read the data into */ tag++; |
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if(tag >= c->max_tag) return NULL; |
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row = tag / P9_ROW_MAXTAG; col = tag % P9_ROW_MAXTAG; return &c->reqs[row][col]; } EXPORT_SYMBOL(p9_tag_lookup); /** * p9_tag_init - setup tags structure and contents |
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* @c: v9fs client struct |
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* * This initializes the tags structure for each client instance. * */ static int p9_tag_init(struct p9_client *c) { int err = 0; c->tagpool = p9_idpool_create(); if (IS_ERR(c->tagpool)) { err = PTR_ERR(c->tagpool); |
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goto error; } |
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err = p9_idpool_get(c->tagpool); /* reserve tag 0 */ if (err < 0) { p9_idpool_destroy(c->tagpool); goto error; } |
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c->max_tag = 0; error: return err; } /** * p9_tag_cleanup - cleans up tags structure and reclaims resources |
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* @c: v9fs client struct |
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* * This frees resources associated with the tags structure * */ static void p9_tag_cleanup(struct p9_client *c) { int row, col; /* check to insure all requests are idle */ for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { for (col = 0; col < P9_ROW_MAXTAG; col++) { if (c->reqs[row][col].status != REQ_STATUS_IDLE) { |
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p9_debug(P9_DEBUG_MUX, "Attempting to cleanup non-free tag %d,%d ", row, col); |
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/* TODO: delay execution of cleanup */ return; } } } |
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if (c->tagpool) { p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ |
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p9_idpool_destroy(c->tagpool); |
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} |
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/* free requests associated with tags */ for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
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for (col = 0; col < P9_ROW_MAXTAG; col++) { |
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kfree(c->reqs[row][col].wq); |
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kfree(c->reqs[row][col].tc); kfree(c->reqs[row][col].rc); } |
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kfree(c->reqs[row]); } c->max_tag = 0; } |
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/** * p9_free_req - free a request and clean-up as necessary * c: client state * r: request to release * */ |
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static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
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{ |
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int tag = r->tc->tag; |
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p9_debug(P9_DEBUG_MUX, "clnt %p req %p tag: %d ", c, r, tag); |
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|
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r->status = REQ_STATUS_IDLE; |
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if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) p9_idpool_put(tag, c->tagpool); |
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} |
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/** * p9_client_cb - call back from transport to client * c: client state * req: request received * */ |
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void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status) |
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{ |
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p9_debug(P9_DEBUG_MUX, " tag %d ", req->tc->tag); |
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/* * This barrier is needed to make sure any change made to req before * the other thread wakes up will indeed be seen by the waiting side. */ smp_wmb(); req->status = status; |
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wake_up(req->wq); |
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p9_debug(P9_DEBUG_MUX, "wakeup: %d ", req->tc->tag); |
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} EXPORT_SYMBOL(p9_client_cb); /** |
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* p9_parse_header - parse header arguments out of a packet * @pdu: packet to parse * @size: size of packet * @type: type of request * @tag: tag of packet * @rewind: set if we need to rewind offset afterwards */ int p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, int rewind) { int8_t r_type; int16_t r_tag; int32_t r_size; int offset = pdu->offset; int err; pdu->offset = 0; if (pdu->size == 0) pdu->size = 7; err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); if (err) goto rewind_and_exit; pdu->size = r_size; pdu->id = r_type; pdu->tag = r_tag; |
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p9_debug(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d ", pdu->size, pdu->id, pdu->tag); |
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491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 |
if (type) *type = r_type; if (tag) *tag = r_tag; if (size) *size = r_size; rewind_and_exit: if (rewind) pdu->offset = offset; return err; } EXPORT_SYMBOL(p9_parse_header); /** * p9_check_errors - check 9p packet for error return and process it * @c: current client instance * @req: request to parse and check for error conditions * * returns error code if one is discovered, otherwise returns 0 * * this will have to be more complicated if we have multiple * error packet types */ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) { int8_t type; int err; |
ca41bb3e2 [net/9p] Handle Z... |
522 |
int ecode; |
51a87c552 9p: rework client... |
523 524 |
err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
348b59012 net/9p: Convert n... |
525 526 527 528 529 |
/* * dump the response from server * This should be after check errors which poplulate pdu_fcall. */ trace_9p_protocol_dump(c, req->rc); |
51a87c552 9p: rework client... |
530 |
if (err) { |
5d3851530 9p: Reduce object... |
531 532 |
p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d ", err); |
51a87c552 9p: rework client... |
533 534 |
return err; } |
ca41bb3e2 [net/9p] Handle Z... |
535 536 |
if (type != P9_RERROR && type != P9_RLERROR) return 0; |
4f7ebe807 net/9p: This patc... |
537 |
|
ca41bb3e2 [net/9p] Handle Z... |
538 539 |
if (!p9_is_proto_dotl(c)) { char *ename; |
ca41bb3e2 [net/9p] Handle Z... |
540 |
err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
abfa034e4 fs/9p: Update zer... |
541 |
&ename, &ecode); |
ca41bb3e2 [net/9p] Handle Z... |
542 543 |
if (err) goto out_err; |
4f7ebe807 net/9p: This patc... |
544 |
|
287980e49 remove lots of IS... |
545 |
if (p9_is_proto_dotu(c) && ecode < 512) |
ca41bb3e2 [net/9p] Handle Z... |
546 |
err = -ecode; |
4f7ebe807 net/9p: This patc... |
547 |
|
287980e49 remove lots of IS... |
548 |
if (!err) { |
ca41bb3e2 [net/9p] Handle Z... |
549 |
err = p9_errstr2errno(ename, strlen(ename)); |
4f7ebe807 net/9p: This patc... |
550 |
|
5d3851530 9p: Reduce object... |
551 552 553 |
p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s ", -ecode, ename); |
4f7ebe807 net/9p: This patc... |
554 |
} |
abfa034e4 fs/9p: Update zer... |
555 |
kfree(ename); |
ca41bb3e2 [net/9p] Handle Z... |
556 557 558 |
} else { err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); err = -ecode; |
5d3851530 9p: Reduce object... |
559 560 |
p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d) ", -ecode); |
ca41bb3e2 [net/9p] Handle Z... |
561 |
} |
51a87c552 9p: rework client... |
562 |
|
51a87c552 9p: rework client... |
563 |
return err; |
4f7ebe807 net/9p: This patc... |
564 565 |
out_err: |
5d3851530 9p: Reduce object... |
566 567 |
p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d ", err); |
4f7ebe807 net/9p: This patc... |
568 569 |
return err; |
51a87c552 9p: rework client... |
570 |
} |
abfa034e4 fs/9p: Update zer... |
571 572 573 574 575 576 577 578 579 580 581 582 583 |
/** * p9_check_zc_errors - check 9p packet for error return and process it * @c: current client instance * @req: request to parse and check for error conditions * @in_hdrlen: Size of response protocol buffer. * * returns error code if one is discovered, otherwise returns 0 * * this will have to be more complicated if we have multiple * error packet types */ static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req, |
4f3b35c15 net/9p: switch th... |
584 |
struct iov_iter *uidata, int in_hdrlen) |
abfa034e4 fs/9p: Update zer... |
585 586 587 588 589 590 591 |
{ int err; int ecode; int8_t type; char *ename = NULL; err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
348b59012 net/9p: Convert n... |
592 593 594 595 596 |
/* * dump the response from server * This should be after parse_header which poplulate pdu_fcall. */ trace_9p_protocol_dump(c, req->rc); |
abfa034e4 fs/9p: Update zer... |
597 |
if (err) { |
5d3851530 9p: Reduce object... |
598 599 |
p9_debug(P9_DEBUG_ERROR, "couldn't parse header %d ", err); |
abfa034e4 fs/9p: Update zer... |
600 601 602 603 604 605 606 607 |
return err; } if (type != P9_RERROR && type != P9_RLERROR) return 0; if (!p9_is_proto_dotl(c)) { /* Error is reported in string format */ |
42fe6484c net/9p: Handle er... |
608 609 610 |
int len; /* 7 = header size for RERROR; */ int inline_len = in_hdrlen - 7; |
abfa034e4 fs/9p: Update zer... |
611 |
|
42fe6484c net/9p: Handle er... |
612 613 614 |
len = req->rc->size - req->rc->offset; if (len > (P9_ZC_HDR_SZ - 7)) { err = -EFAULT; |
abfa034e4 fs/9p: Update zer... |
615 616 |
goto out_err; } |
abfa034e4 fs/9p: Update zer... |
617 |
|
42fe6484c net/9p: Handle er... |
618 619 620 |
ename = &req->rc->sdata[req->rc->offset]; if (len > inline_len) { /* We have error in external buffer */ |
1c512a7ca net/9p: switch to... |
621 622 |
if (!copy_from_iter_full(ename + inline_len, len - inline_len, uidata)) { |
4f3b35c15 net/9p: switch th... |
623 624 |
err = -EFAULT; goto out_err; |
abfa034e4 fs/9p: Update zer... |
625 626 |
} } |
42fe6484c net/9p: Handle er... |
627 628 629 630 631 |
ename = NULL; err = p9pdu_readf(req->rc, c->proto_version, "s?d", &ename, &ecode); if (err) goto out_err; |
287980e49 remove lots of IS... |
632 |
if (p9_is_proto_dotu(c) && ecode < 512) |
abfa034e4 fs/9p: Update zer... |
633 |
err = -ecode; |
42fe6484c net/9p: Handle er... |
634 |
|
287980e49 remove lots of IS... |
635 |
if (!err) { |
abfa034e4 fs/9p: Update zer... |
636 |
err = p9_errstr2errno(ename, strlen(ename)); |
5d3851530 9p: Reduce object... |
637 638 639 |
p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s ", -ecode, ename); |
abfa034e4 fs/9p: Update zer... |
640 641 642 643 644 |
} kfree(ename); } else { err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); err = -ecode; |
5d3851530 9p: Reduce object... |
645 646 |
p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d) ", -ecode); |
abfa034e4 fs/9p: Update zer... |
647 648 |
} return err; |
abfa034e4 fs/9p: Update zer... |
649 |
out_err: |
5d3851530 9p: Reduce object... |
650 651 |
p9_debug(P9_DEBUG_ERROR, "couldn't parse error%d ", err); |
abfa034e4 fs/9p: Update zer... |
652 653 |
return err; } |
aca007633 9p: typo fixes an... |
654 655 |
static struct p9_req_t * p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); |
51a87c552 9p: rework client... |
656 657 |
/** * p9_client_flush - flush (cancel) a request |
0e15597eb 9p: minor comment... |
658 659 |
* @c: client state * @oldreq: request to cancel |
51a87c552 9p: rework client... |
660 |
* |
aca007633 9p: typo fixes an... |
661 |
* This sents a flush for a particular request and links |
51a87c552 9p: rework client... |
662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 |
* the flush request to the original request. The current * code only supports a single flush request although the protocol * allows for multiple flush requests to be sent for a single request. * */ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) { struct p9_req_t *req; int16_t oldtag; int err; err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); if (err) return err; |
5d3851530 9p: Reduce object... |
677 678 |
p9_debug(P9_DEBUG_9P, ">>> TFLUSH tag %d ", oldtag); |
51a87c552 9p: rework client... |
679 680 681 682 |
req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); if (IS_ERR(req)) return PTR_ERR(req); |
1cff33069 9P/RDMA: count po... |
683 684 |
/* * if we haven't received a response for oldreq, |
60ff779c4 9p: client: remov... |
685 |
* remove it from the list |
1cff33069 9P/RDMA: count po... |
686 |
*/ |
0bfd6845c 9P: Get rid of RE... |
687 |
if (oldreq->status == REQ_STATUS_SENT) |
afd8d6541 9P: Add cancelled... |
688 689 |
if (c->trans_mod->cancelled) c->trans_mod->cancelled(c, oldreq); |
1bab88b23 net/9p: handle co... |
690 691 |
p9_free_req(c, req); |
51a87c552 9p: rework client... |
692 693 |
return 0; } |
abfa034e4 fs/9p: Update zer... |
694 695 696 |
static struct p9_req_t *p9_client_prepare_req(struct p9_client *c, int8_t type, int req_size, const char *fmt, va_list ap) |
91b8534fa 9p: make rpc code... |
697 |
{ |
51a87c552 9p: rework client... |
698 |
int tag, err; |
91b8534fa 9p: make rpc code... |
699 |
struct p9_req_t *req; |
91b8534fa 9p: make rpc code... |
700 |
|
5d3851530 9p: Reduce object... |
701 702 |
p9_debug(P9_DEBUG_MUX, "client %p op %d ", c, type); |
91b8534fa 9p: make rpc code... |
703 |
|
6d96d3ab7 9p: Make sure we ... |
704 705 706 707 708 709 |
/* we allow for any status other than disconnected */ if (c->status == Disconnected) return ERR_PTR(-EIO); /* if status is begin_disconnected we allow only clunk request */ if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) |
51a87c552 9p: rework client... |
710 |
return ERR_PTR(-EIO); |
91b8534fa 9p: make rpc code... |
711 |
|
91b8534fa 9p: make rpc code... |
712 |
tag = P9_NOTAG; |
51a87c552 9p: rework client... |
713 |
if (type != P9_TVERSION) { |
91b8534fa 9p: make rpc code... |
714 715 |
tag = p9_idpool_get(c->tagpool); if (tag < 0) |
51a87c552 9p: rework client... |
716 |
return ERR_PTR(-ENOMEM); |
91b8534fa 9p: make rpc code... |
717 |
} |
abfa034e4 fs/9p: Update zer... |
718 |
req = p9_tag_alloc(c, tag, req_size); |
51a87c552 9p: rework client... |
719 720 |
if (IS_ERR(req)) return req; |
91b8534fa 9p: make rpc code... |
721 |
|
51a87c552 9p: rework client... |
722 723 |
/* marshall the data */ p9pdu_prepare(req->tc, tag, type); |
342fee1d5 9P2010.L handshak... |
724 |
err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
7b3bb3fe1 net/9p: Return er... |
725 726 |
if (err) goto reterr; |
348b59012 net/9p: Convert n... |
727 728 |
p9pdu_finalize(c, req->tc); trace_9p_client_req(c, type, tag); |
abfa034e4 fs/9p: Update zer... |
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 |
return req; reterr: p9_free_req(c, req); return ERR_PTR(err); } /** * p9_client_rpc - issue a request and wait for a response * @c: client session * @type: type of request * @fmt: protocol format string (see protocol.c) * * Returns request structure (which client must free using p9_free_req) */ static struct p9_req_t * p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) { va_list ap; int sigpending, err; unsigned long flags; struct p9_req_t *req; va_start(ap, fmt); req = p9_client_prepare_req(c, type, c->msize, fmt, ap); va_end(ap); if (IS_ERR(req)) return req; if (signal_pending(current)) { sigpending = 1; clear_thread_flag(TIF_SIGPENDING); } else sigpending = 0; |
91b8534fa 9p: make rpc code... |
763 764 765 |
err = c->trans_mod->request(c, req); if (err < 0) { |
3cd796782 net/9p: Handle ge... |
766 |
if (err != -ERESTARTSYS && err != -EFAULT) |
52f44e0d0 net/9p: Add waitq... |
767 |
c->status = Disconnected; |
91b8534fa 9p: make rpc code... |
768 769 |
goto reterr; } |
a314f2748 net/9p: don't all... |
770 |
again: |
abfa034e4 fs/9p: Update zer... |
771 |
/* Wait for the response */ |
b5c87f23a net/9p: Switch to... |
772 |
err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); |
91b8534fa 9p: make rpc code... |
773 |
|
2b6e72ed7 9P: Add memory ba... |
774 775 776 777 778 |
/* * Make sure our req is coherent with regard to updates in other * threads - echoes to wmb() in the callback */ smp_rmb(); |
a314f2748 net/9p: don't all... |
779 780 781 782 783 784 |
if ((err == -ERESTARTSYS) && (c->status == Connected) && (type == P9_TFLUSH)) { sigpending = 1; clear_thread_flag(TIF_SIGPENDING); goto again; } |
91b8534fa 9p: make rpc code... |
785 |
if (req->status == REQ_STATUS_ERROR) { |
5d3851530 9p: Reduce object... |
786 787 |
p9_debug(P9_DEBUG_ERROR, "req_status error %d ", req->t_err); |
91b8534fa 9p: make rpc code... |
788 |
err = req->t_err; |
91b8534fa 9p: make rpc code... |
789 |
} |
1bab88b23 net/9p: handle co... |
790 |
if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d3851530 9p: Reduce object... |
791 792 |
p9_debug(P9_DEBUG_MUX, "flushing "); |
91b8534fa 9p: make rpc code... |
793 |
sigpending = 1; |
91b8534fa 9p: make rpc code... |
794 |
clear_thread_flag(TIF_SIGPENDING); |
1bab88b23 net/9p: handle co... |
795 796 797 798 799 800 |
if (c->trans_mod->cancel(c, req)) p9_client_flush(c, req); /* if we received the response anyway, don't signal error */ if (req->status == REQ_STATUS_RCVD) err = 0; |
91b8534fa 9p: make rpc code... |
801 |
} |
91b8534fa 9p: make rpc code... |
802 803 804 805 806 |
if (sigpending) { spin_lock_irqsave(¤t->sighand->siglock, flags); recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); } |
91b8534fa 9p: make rpc code... |
807 808 |
if (err < 0) goto reterr; |
51a87c552 9p: rework client... |
809 |
err = p9_check_errors(c, req); |
348b59012 net/9p: Convert n... |
810 811 |
trace_9p_client_res(c, type, req->rc->tag, err); if (!err) |
51a87c552 9p: rework client... |
812 |
return req; |
abfa034e4 fs/9p: Update zer... |
813 |
reterr: |
abfa034e4 fs/9p: Update zer... |
814 |
p9_free_req(c, req); |
43def35c1 net/9p: Check err... |
815 |
return ERR_PTR(safe_errno(err)); |
abfa034e4 fs/9p: Update zer... |
816 817 818 819 820 821 |
} /** * p9_client_zc_rpc - issue a request and wait for a response * @c: client session * @type: type of request |
4f3b35c15 net/9p: switch th... |
822 823 |
* @uidata: destination for zero copy read * @uodata: source for zero copy write |
abfa034e4 fs/9p: Update zer... |
824 825 826 827 828 829 830 831 |
* @inlen: read buffer size * @olen: write buffer size * @hdrlen: reader header size, This is the size of response protocol data * @fmt: protocol format string (see protocol.c) * * Returns request structure (which client must free using p9_free_req) */ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type, |
4f3b35c15 net/9p: switch th... |
832 833 |
struct iov_iter *uidata, struct iov_iter *uodata, |
abfa034e4 fs/9p: Update zer... |
834 |
int inlen, int olen, int in_hdrlen, |
4f3b35c15 net/9p: switch th... |
835 |
const char *fmt, ...) |
abfa034e4 fs/9p: Update zer... |
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 |
{ va_list ap; int sigpending, err; unsigned long flags; struct p9_req_t *req; va_start(ap, fmt); /* * We allocate a inline protocol data of only 4k bytes. * The actual content is passed in zero-copy fashion. */ req = p9_client_prepare_req(c, type, P9_ZC_HDR_SZ, fmt, ap); va_end(ap); if (IS_ERR(req)) return req; if (signal_pending(current)) { sigpending = 1; clear_thread_flag(TIF_SIGPENDING); } else sigpending = 0; |
abfa034e4 fs/9p: Update zer... |
857 |
err = c->trans_mod->zc_request(c, req, uidata, uodata, |
4f3b35c15 net/9p: switch th... |
858 |
inlen, olen, in_hdrlen); |
abfa034e4 fs/9p: Update zer... |
859 860 861 |
if (err < 0) { if (err == -EIO) c->status = Disconnected; |
a84b69cb6 9p: forgetting to... |
862 863 |
if (err != -ERESTARTSYS) goto reterr; |
abfa034e4 fs/9p: Update zer... |
864 865 |
} if (req->status == REQ_STATUS_ERROR) { |
5d3851530 9p: Reduce object... |
866 867 |
p9_debug(P9_DEBUG_ERROR, "req_status error %d ", req->t_err); |
abfa034e4 fs/9p: Update zer... |
868 869 870 |
err = req->t_err; } if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
5d3851530 9p: Reduce object... |
871 872 |
p9_debug(P9_DEBUG_MUX, "flushing "); |
abfa034e4 fs/9p: Update zer... |
873 874 |
sigpending = 1; clear_thread_flag(TIF_SIGPENDING); |
91b8534fa 9p: make rpc code... |
875 |
|
abfa034e4 fs/9p: Update zer... |
876 877 878 879 880 881 882 883 884 885 886 887 888 889 |
if (c->trans_mod->cancel(c, req)) p9_client_flush(c, req); /* if we received the response anyway, don't signal error */ if (req->status == REQ_STATUS_RCVD) err = 0; } if (sigpending) { spin_lock_irqsave(¤t->sighand->siglock, flags); recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); } if (err < 0) goto reterr; |
4f3b35c15 net/9p: switch th... |
890 |
err = p9_check_zc_errors(c, req, uidata, in_hdrlen); |
348b59012 net/9p: Convert n... |
891 892 |
trace_9p_client_res(c, type, req->rc->tag, err); if (!err) |
abfa034e4 fs/9p: Update zer... |
893 |
return req; |
91b8534fa 9p: make rpc code... |
894 895 |
reterr: p9_free_req(c, req); |
43def35c1 net/9p: Check err... |
896 |
return ERR_PTR(safe_errno(err)); |
91b8534fa 9p: make rpc code... |
897 |
} |
5503ac565 9p: remove unnece... |
898 899 |
static struct p9_fid *p9_fid_create(struct p9_client *clnt) { |
9f3e9bbe6 unsigned fid->fid... |
900 |
int ret; |
5503ac565 9p: remove unnece... |
901 |
struct p9_fid *fid; |
cac23d650 9p: Make all clie... |
902 |
unsigned long flags; |
5503ac565 9p: remove unnece... |
903 |
|
5d3851530 9p: Reduce object... |
904 905 |
p9_debug(P9_DEBUG_FID, "clnt %p ", clnt); |
5503ac565 9p: remove unnece... |
906 907 908 |
fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); if (!fid) return ERR_PTR(-ENOMEM); |
9f3e9bbe6 unsigned fid->fid... |
909 |
ret = p9_idpool_get(clnt->fidpool); |
24e94de41 net/9p: fid->fid ... |
910 |
if (ret < 0) { |
9f3e9bbe6 unsigned fid->fid... |
911 |
ret = -ENOSPC; |
5503ac565 9p: remove unnece... |
912 913 |
goto error; } |
9f3e9bbe6 unsigned fid->fid... |
914 |
fid->fid = ret; |
5503ac565 9p: remove unnece... |
915 916 917 |
memset(&fid->qid, 0, sizeof(struct p9_qid)); fid->mode = -1; |
f8b9d53a3 CRED: Wrap task c... |
918 |
fid->uid = current_fsuid(); |
5503ac565 9p: remove unnece... |
919 |
fid->clnt = clnt; |
3e2796a90 9p: fix readdir c... |
920 |
fid->rdir = NULL; |
cac23d650 9p: Make all clie... |
921 |
spin_lock_irqsave(&clnt->lock, flags); |
5503ac565 9p: remove unnece... |
922 |
list_add(&fid->flist, &clnt->fidlist); |
cac23d650 9p: Make all clie... |
923 |
spin_unlock_irqrestore(&clnt->lock, flags); |
5503ac565 9p: remove unnece... |
924 925 926 927 928 |
return fid; error: kfree(fid); |
9f3e9bbe6 unsigned fid->fid... |
929 |
return ERR_PTR(ret); |
5503ac565 9p: remove unnece... |
930 931 932 933 934 |
} static void p9_fid_destroy(struct p9_fid *fid) { struct p9_client *clnt; |
cac23d650 9p: Make all clie... |
935 |
unsigned long flags; |
5503ac565 9p: remove unnece... |
936 |
|
5d3851530 9p: Reduce object... |
937 938 |
p9_debug(P9_DEBUG_FID, "fid %d ", fid->fid); |
5503ac565 9p: remove unnece... |
939 940 |
clnt = fid->clnt; p9_idpool_put(fid->fid, clnt->fidpool); |
cac23d650 9p: Make all clie... |
941 |
spin_lock_irqsave(&clnt->lock, flags); |
5503ac565 9p: remove unnece... |
942 |
list_del(&fid->flist); |
cac23d650 9p: Make all clie... |
943 |
spin_unlock_irqrestore(&clnt->lock, flags); |
3e2796a90 9p: fix readdir c... |
944 |
kfree(fid->rdir); |
5503ac565 9p: remove unnece... |
945 946 |
kfree(fid); } |
8a0dc95fd 9p: transport API... |
947 |
|
32a875adc 9p: client code c... |
948 |
static int p9_client_version(struct p9_client *c) |
bd238fb43 9p: Reorganizatio... |
949 |
{ |
6936bf60d 9p: encapsulate v... |
950 |
int err = 0; |
51a87c552 9p: rework client... |
951 |
struct p9_req_t *req; |
312479e06 net/9p/client.c: ... |
952 |
char *version = NULL; |
51a87c552 9p: rework client... |
953 |
int msize; |
bd238fb43 9p: Reorganizatio... |
954 |
|
5d3851530 9p: Reduce object... |
955 956 957 |
p9_debug(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d ", c->msize, c->proto_version); |
c5a7697da 9P2010.L handshak... |
958 959 |
switch (c->proto_version) { |
45bc21edb 9p: Change the na... |
960 |
case p9_proto_2000L: |
c5a7697da 9P2010.L handshak... |
961 |
req = p9_client_rpc(c, P9_TVERSION, "ds", |
45bc21edb 9p: Change the na... |
962 |
c->msize, "9P2000.L"); |
c5a7697da 9P2010.L handshak... |
963 964 965 966 967 968 969 970 971 972 973 |
break; case p9_proto_2000u: req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize, "9P2000.u"); break; case p9_proto_legacy: req = p9_client_rpc(c, P9_TVERSION, "ds", c->msize, "9P2000"); break; default: return -EINVAL; |
c5a7697da 9P2010.L handshak... |
974 |
} |
51a87c552 9p: rework client... |
975 976 |
if (IS_ERR(req)) return PTR_ERR(req); |
6936bf60d 9p: encapsulate v... |
977 |
|
342fee1d5 9P2010.L handshak... |
978 |
err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
51a87c552 9p: rework client... |
979 |
if (err) { |
5d3851530 9p: Reduce object... |
980 981 |
p9_debug(P9_DEBUG_9P, "version error %d ", err); |
348b59012 net/9p: Convert n... |
982 |
trace_9p_protocol_dump(c, req->rc); |
6936bf60d 9p: encapsulate v... |
983 |
goto error; |
51a87c552 9p: rework client... |
984 |
} |
6936bf60d 9p: encapsulate v... |
985 |
|
5d3851530 9p: Reduce object... |
986 987 |
p9_debug(P9_DEBUG_9P, "<<< RVERSION msize %d %s ", msize, version); |
45bc21edb 9p: Change the na... |
988 989 |
if (!strncmp(version, "9P2000.L", 8)) c->proto_version = p9_proto_2000L; |
c5a7697da 9P2010.L handshak... |
990 |
else if (!strncmp(version, "9P2000.u", 8)) |
342fee1d5 9P2010.L handshak... |
991 992 993 |
c->proto_version = p9_proto_2000u; else if (!strncmp(version, "9P2000", 6)) c->proto_version = p9_proto_legacy; |
6936bf60d 9p: encapsulate v... |
994 |
else { |
186213114 9p/net: put a low... |
995 996 997 |
p9_debug(P9_DEBUG_ERROR, "server returned an unknown version: %s ", version); |
6936bf60d 9p: encapsulate v... |
998 999 1000 |
err = -EREMOTEIO; goto error; } |
186213114 9p/net: put a low... |
1001 1002 1003 1004 1005 1006 1007 |
if (msize < 4096) { p9_debug(P9_DEBUG_ERROR, "server returned a msize < 4096: %d ", msize); err = -EREMOTEIO; goto error; } |
51a87c552 9p: rework client... |
1008 1009 |
if (msize < c->msize) c->msize = msize; |
6936bf60d 9p: encapsulate v... |
1010 1011 |
error: |
51a87c552 9p: rework client... |
1012 1013 |
kfree(version); p9_free_req(c, req); |
6936bf60d 9p: encapsulate v... |
1014 1015 1016 |
return err; } |
6936bf60d 9p: encapsulate v... |
1017 1018 1019 1020 1021 |
struct p9_client *p9_client_create(const char *dev_name, char *options) { int err; struct p9_client *clnt; |
50192abe0 fs/9p: avoid acce... |
1022 |
char *client_id; |
6936bf60d 9p: encapsulate v... |
1023 1024 |
err = 0; |
bd238fb43 9p: Reorganizatio... |
1025 1026 1027 |
clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); if (!clnt) return ERR_PTR(-ENOMEM); |
72029fe85 9p: implement pro... |
1028 |
clnt->trans_mod = NULL; |
bb8ffdfc3 9p: propagate par... |
1029 |
clnt->trans = NULL; |
50192abe0 fs/9p: avoid acce... |
1030 1031 1032 |
client_id = utsname()->nodename; memcpy(clnt->name, client_id, strlen(client_id) + 1); |
bd238fb43 9p: Reorganizatio... |
1033 |
spin_lock_init(&clnt->lock); |
bd238fb43 9p: Reorganizatio... |
1034 |
INIT_LIST_HEAD(&clnt->fidlist); |
bd238fb43 9p: Reorganizatio... |
1035 |
|
fe1cbabae net/9p: p9_idpool... |
1036 1037 1038 |
err = p9_tag_init(clnt); if (err < 0) goto free_client; |
fea511a64 9p: move request ... |
1039 |
|
bb8ffdfc3 9p: propagate par... |
1040 1041 |
err = parse_opts(options, clnt); if (err < 0) |
fe1cbabae net/9p: p9_idpool... |
1042 |
goto destroy_tagpool; |
bb8ffdfc3 9p: propagate par... |
1043 |
|
a17d1720a 9p: default 9p tr... |
1044 1045 |
if (!clnt->trans_mod) clnt->trans_mod = v9fs_get_default_trans(); |
8a0dc95fd 9p: transport API... |
1046 1047 |
if (clnt->trans_mod == NULL) { err = -EPROTONOSUPPORT; |
5d3851530 9p: Reduce object... |
1048 1049 1050 |
p9_debug(P9_DEBUG_ERROR, "No transport defined or default transport "); |
fe1cbabae net/9p: p9_idpool... |
1051 |
goto destroy_tagpool; |
8781ff949 9p: fix p9_client... |
1052 1053 1054 1055 1056 |
} clnt->fidpool = p9_idpool_create(); if (IS_ERR(clnt->fidpool)) { err = PTR_ERR(clnt->fidpool); |
8781ff949 9p: fix p9_client... |
1057 |
goto put_trans; |
8a0dc95fd 9p: transport API... |
1058 |
} |
5d3851530 9p: Reduce object... |
1059 1060 1061 |
p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d ", clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
8a0dc95fd 9p: transport API... |
1062 |
|
8b81ef589 9p: consolidate t... |
1063 1064 |
err = clnt->trans_mod->create(clnt, dev_name, options); if (err) |
8781ff949 9p: fix p9_client... |
1065 |
goto destroy_fidpool; |
bd238fb43 9p: Reorganizatio... |
1066 |
|
c9ffb05ca net/9p: Fix the m... |
1067 1068 |
if (clnt->msize > clnt->trans_mod->maxsize) clnt->msize = clnt->trans_mod->maxsize; |
8a0dc95fd 9p: transport API... |
1069 |
|
186213114 9p/net: put a low... |
1070 1071 1072 1073 1074 1075 1076 |
if (clnt->msize < 4096) { p9_debug(P9_DEBUG_ERROR, "Please specify a msize of at least 4k "); err = -EINVAL; goto free_client; } |
6936bf60d 9p: encapsulate v... |
1077 |
err = p9_client_version(clnt); |
bd238fb43 9p: Reorganizatio... |
1078 |
if (err) |
8781ff949 9p: fix p9_client... |
1079 |
goto close_trans; |
bd238fb43 9p: Reorganizatio... |
1080 |
|
bd238fb43 9p: Reorganizatio... |
1081 |
return clnt; |
8781ff949 9p: fix p9_client... |
1082 1083 1084 1085 1086 1087 |
close_trans: clnt->trans_mod->close(clnt); destroy_fidpool: p9_idpool_destroy(clnt->fidpool); put_trans: v9fs_put_trans(clnt->trans_mod); |
fe1cbabae net/9p: p9_idpool... |
1088 1089 |
destroy_tagpool: p9_idpool_destroy(clnt->tagpool); |
8781ff949 9p: fix p9_client... |
1090 1091 |
free_client: kfree(clnt); |
bd238fb43 9p: Reorganizatio... |
1092 1093 1094 1095 1096 1097 1098 |
return ERR_PTR(err); } EXPORT_SYMBOL(p9_client_create); void p9_client_destroy(struct p9_client *clnt) { struct p9_fid *fid, *fidptr; |
5d3851530 9p: Reduce object... |
1099 1100 |
p9_debug(P9_DEBUG_MUX, "clnt %p ", clnt); |
bd238fb43 9p: Reorganizatio... |
1101 |
|
8b81ef589 9p: consolidate t... |
1102 1103 |
if (clnt->trans_mod) clnt->trans_mod->close(clnt); |
bd238fb43 9p: Reorganizatio... |
1104 |
|
72029fe85 9p: implement pro... |
1105 |
v9fs_put_trans(clnt->trans_mod); |
6d96d3ab7 9p: Make sure we ... |
1106 |
list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
5d3851530 9p: Reduce object... |
1107 1108 |
pr_info("Found fid %d not clunked ", fid->fid); |
bd238fb43 9p: Reorganizatio... |
1109 |
p9_fid_destroy(fid); |
6d96d3ab7 9p: Make sure we ... |
1110 |
} |
bd238fb43 9p: Reorganizatio... |
1111 |
|
0af8887eb 9p: fix a race co... |
1112 1113 |
if (clnt->fidpool) p9_idpool_destroy(clnt->fidpool); |
fea511a64 9p: move request ... |
1114 |
p9_tag_cleanup(clnt); |
bd238fb43 9p: Reorganizatio... |
1115 1116 1117 1118 1119 1120 |
kfree(clnt); } EXPORT_SYMBOL(p9_client_destroy); void p9_client_disconnect(struct p9_client *clnt) { |
5d3851530 9p: Reduce object... |
1121 1122 |
p9_debug(P9_DEBUG_9P, "clnt %p ", clnt); |
8b81ef589 9p: consolidate t... |
1123 |
clnt->status = Disconnected; |
bd238fb43 9p: Reorganizatio... |
1124 1125 |
} EXPORT_SYMBOL(p9_client_disconnect); |
6d96d3ab7 9p: Make sure we ... |
1126 1127 |
void p9_client_begin_disconnect(struct p9_client *clnt) { |
5d3851530 9p: Reduce object... |
1128 1129 |
p9_debug(P9_DEBUG_9P, "clnt %p ", clnt); |
6d96d3ab7 9p: Make sure we ... |
1130 1131 1132 |
clnt->status = BeginDisconnect; } EXPORT_SYMBOL(p9_client_begin_disconnect); |
bd238fb43 9p: Reorganizatio... |
1133 |
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
7880b43bd 9p: constify ->d_... |
1134 |
const char *uname, kuid_t n_uname, const char *aname) |
bd238fb43 9p: Reorganizatio... |
1135 |
{ |
348b59012 net/9p: Convert n... |
1136 |
int err = 0; |
51a87c552 9p: rework client... |
1137 |
struct p9_req_t *req; |
bd238fb43 9p: Reorganizatio... |
1138 |
struct p9_fid *fid; |
51a87c552 9p: rework client... |
1139 |
struct p9_qid qid; |
bd238fb43 9p: Reorganizatio... |
1140 |
|
bd238fb43 9p: Reorganizatio... |
1141 |
|
5d3851530 9p: Reduce object... |
1142 1143 1144 |
p9_debug(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s ", afid ? afid->fid : -1, uname, aname); |
bd238fb43 9p: Reorganizatio... |
1145 1146 1147 1148 1149 1150 |
fid = p9_fid_create(clnt); if (IS_ERR(fid)) { err = PTR_ERR(fid); fid = NULL; goto error; } |
21c9f5ccb p9_client_attach(... |
1151 |
fid->uid = n_uname; |
bd238fb43 9p: Reorganizatio... |
1152 |
|
f791f7c5e 9p: Transmit kuid... |
1153 |
req = p9_client_rpc(clnt, P9_TATTACH, "ddss?u", fid->fid, |
51a87c552 9p: rework client... |
1154 1155 1156 |
afid ? afid->fid : P9_NOFID, uname, aname, n_uname); if (IS_ERR(req)) { err = PTR_ERR(req); |
bd238fb43 9p: Reorganizatio... |
1157 1158 |
goto error; } |
342fee1d5 9P2010.L handshak... |
1159 |
err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
51a87c552 9p: rework client... |
1160 |
if (err) { |
348b59012 net/9p: Convert n... |
1161 |
trace_9p_protocol_dump(clnt, req->rc); |
51a87c552 9p: rework client... |
1162 |
p9_free_req(clnt, req); |
bd238fb43 9p: Reorganizatio... |
1163 |
goto error; |
51a87c552 9p: rework client... |
1164 |
} |
bd238fb43 9p: Reorganizatio... |
1165 |
|
5d3851530 9p: Reduce object... |
1166 1167 1168 |
p9_debug(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x ", qid.type, (unsigned long long)qid.path, qid.version); |
51a87c552 9p: rework client... |
1169 1170 1171 1172 |
memmove(&fid->qid, &qid, sizeof(struct p9_qid)); p9_free_req(clnt, req); |
bd238fb43 9p: Reorganizatio... |
1173 1174 1175 |
return fid; error: |
bd238fb43 9p: Reorganizatio... |
1176 1177 1178 1179 1180 |
if (fid) p9_fid_destroy(fid); return ERR_PTR(err); } EXPORT_SYMBOL(p9_client_attach); |
b76225e22 net/9p: nwname sh... |
1181 |
struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname, |
7880b43bd 9p: constify ->d_... |
1182 |
const unsigned char * const *wnames, int clone) |
bd238fb43 9p: Reorganizatio... |
1183 1184 |
{ int err; |
bd238fb43 9p: Reorganizatio... |
1185 1186 |
struct p9_client *clnt; struct p9_fid *fid; |
51a87c552 9p: rework client... |
1187 1188 |
struct p9_qid *wqids; struct p9_req_t *req; |
b76225e22 net/9p: nwname sh... |
1189 |
uint16_t nwqids, count; |
bd238fb43 9p: Reorganizatio... |
1190 |
|
bd238fb43 9p: Reorganizatio... |
1191 |
err = 0; |
62b2be591 fs/9p, net/9p: me... |
1192 |
wqids = NULL; |
bd238fb43 9p: Reorganizatio... |
1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 |
clnt = oldfid->clnt; if (clone) { fid = p9_fid_create(clnt); if (IS_ERR(fid)) { err = PTR_ERR(fid); fid = NULL; goto error; } fid->uid = oldfid->uid; } else fid = oldfid; |
51a87c552 9p: rework client... |
1205 |
|
5d3851530 9p: Reduce object... |
1206 1207 1208 |
p9_debug(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %ud wname[0] %s ", oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
51a87c552 9p: rework client... |
1209 1210 1211 1212 1213 |
req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, nwname, wnames); if (IS_ERR(req)) { err = PTR_ERR(req); |
bd238fb43 9p: Reorganizatio... |
1214 1215 |
goto error; } |
342fee1d5 9P2010.L handshak... |
1216 |
err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
e7f4b8f1a 9p: Improve debug... |
1217 |
if (err) { |
348b59012 net/9p: Convert n... |
1218 |
trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1a 9p: Improve debug... |
1219 |
p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1220 |
goto clunk_fid; |
e7f4b8f1a 9p: Improve debug... |
1221 1222 |
} p9_free_req(clnt, req); |
bd238fb43 9p: Reorganizatio... |
1223 |
|
5d3851530 9p: Reduce object... |
1224 1225 |
p9_debug(P9_DEBUG_9P, "<<< RWALK nwqid %d: ", nwqids); |
51a87c552 9p: rework client... |
1226 1227 |
if (nwqids != nwname) { |
bd238fb43 9p: Reorganizatio... |
1228 1229 1230 |
err = -ENOENT; goto clunk_fid; } |
51a87c552 9p: rework client... |
1231 |
for (count = 0; count < nwqids; count++) |
5d3851530 9p: Reduce object... |
1232 1233 |
p9_debug(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x ", |
b0d5fdef5 net/9p: fix print... |
1234 1235 |
count, wqids[count].type, (unsigned long long)wqids[count].path, |
51a87c552 9p: rework client... |
1236 |
wqids[count].version); |
bd238fb43 9p: Reorganizatio... |
1237 |
if (nwname) |
51a87c552 9p: rework client... |
1238 |
memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
bd238fb43 9p: Reorganizatio... |
1239 1240 |
else fid->qid = oldfid->qid; |
62b2be591 fs/9p, net/9p: me... |
1241 |
kfree(wqids); |
bd238fb43 9p: Reorganizatio... |
1242 1243 1244 |
return fid; clunk_fid: |
62b2be591 fs/9p, net/9p: me... |
1245 |
kfree(wqids); |
51a87c552 9p: rework client... |
1246 1247 |
p9_client_clunk(fid); fid = NULL; |
bd238fb43 9p: Reorganizatio... |
1248 1249 |
error: |
bd238fb43 9p: Reorganizatio... |
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 |
if (fid && (fid != oldfid)) p9_fid_destroy(fid); return ERR_PTR(err); } EXPORT_SYMBOL(p9_client_walk); int p9_client_open(struct p9_fid *fid, int mode) { int err; |
bd238fb43 9p: Reorganizatio... |
1260 |
struct p9_client *clnt; |
51a87c552 9p: rework client... |
1261 1262 1263 |
struct p9_req_t *req; struct p9_qid qid; int iounit; |
bd238fb43 9p: Reorganizatio... |
1264 |
|
bd238fb43 9p: Reorganizatio... |
1265 |
clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
1266 1267 |
p9_debug(P9_DEBUG_9P, ">>> %s fid %d mode %d ", |
ef56547ef 9p: Implement LOPEN |
1268 1269 |
p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); err = 0; |
bd238fb43 9p: Reorganizatio... |
1270 1271 1272 |
if (fid->mode != -1) return -EINVAL; |
ef56547ef 9p: Implement LOPEN |
1273 1274 1275 1276 |
if (p9_is_proto_dotl(clnt)) req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); else req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); |
51a87c552 9p: rework client... |
1277 1278 1279 |
if (IS_ERR(req)) { err = PTR_ERR(req); goto error; |
bd238fb43 9p: Reorganizatio... |
1280 |
} |
342fee1d5 9P2010.L handshak... |
1281 |
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1a 9p: Improve debug... |
1282 |
if (err) { |
348b59012 net/9p: Convert n... |
1283 |
trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1a 9p: Improve debug... |
1284 1285 |
goto free_and_error; } |
51a87c552 9p: rework client... |
1286 |
|
5d3851530 9p: Reduce object... |
1287 1288 |
p9_debug(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x ", |
ef56547ef 9p: Implement LOPEN |
1289 1290 |
p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, (unsigned long long)qid.path, qid.version, iounit); |
bd238fb43 9p: Reorganizatio... |
1291 1292 |
fid->mode = mode; |
51a87c552 9p: rework client... |
1293 |
fid->iounit = iounit; |
bd238fb43 9p: Reorganizatio... |
1294 |
|
e7f4b8f1a 9p: Improve debug... |
1295 1296 |
free_and_error: p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1297 |
error: |
bd238fb43 9p: Reorganizatio... |
1298 1299 1300 |
return err; } EXPORT_SYMBOL(p9_client_open); |
7880b43bd 9p: constify ->d_... |
1301 |
int p9_client_create_dotl(struct p9_fid *ofid, const char *name, u32 flags, u32 mode, |
f791f7c5e 9p: Transmit kuid... |
1302 |
kgid_t gid, struct p9_qid *qid) |
5643135a2 fs/9p: This patch... |
1303 1304 1305 1306 1307 |
{ int err = 0; struct p9_client *clnt; struct p9_req_t *req; int iounit; |
5d3851530 9p: Reduce object... |
1308 |
p9_debug(P9_DEBUG_9P, |
5643135a2 fs/9p: This patch... |
1309 1310 |
">>> TLCREATE fid %d name %s flags %d mode %d gid %d ", |
f791f7c5e 9p: Transmit kuid... |
1311 1312 |
ofid->fid, name, flags, mode, from_kgid(&init_user_ns, gid)); |
5643135a2 fs/9p: This patch... |
1313 1314 1315 1316 |
clnt = ofid->clnt; if (ofid->mode != -1) return -EINVAL; |
f791f7c5e 9p: Transmit kuid... |
1317 |
req = p9_client_rpc(clnt, P9_TLCREATE, "dsddg", ofid->fid, name, flags, |
5643135a2 fs/9p: This patch... |
1318 1319 1320 1321 1322 1323 1324 1325 |
mode, gid); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); if (err) { |
348b59012 net/9p: Convert n... |
1326 |
trace_9p_protocol_dump(clnt, req->rc); |
5643135a2 fs/9p: This patch... |
1327 1328 |
goto free_and_error; } |
5d3851530 9p: Reduce object... |
1329 1330 |
p9_debug(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x ", |
5643135a2 fs/9p: This patch... |
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 |
qid->type, (unsigned long long)qid->path, qid->version, iounit); ofid->mode = mode; ofid->iounit = iounit; free_and_error: p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_create_dotl); |
7880b43bd 9p: constify ->d_... |
1344 |
int p9_client_fcreate(struct p9_fid *fid, const char *name, u32 perm, int mode, |
bd238fb43 9p: Reorganizatio... |
1345 1346 1347 |
char *extension) { int err; |
bd238fb43 9p: Reorganizatio... |
1348 |
struct p9_client *clnt; |
51a87c552 9p: rework client... |
1349 1350 1351 |
struct p9_req_t *req; struct p9_qid qid; int iounit; |
bd238fb43 9p: Reorganizatio... |
1352 |
|
5d3851530 9p: Reduce object... |
1353 1354 |
p9_debug(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d ", |
51a87c552 9p: rework client... |
1355 |
fid->fid, name, perm, mode); |
bd238fb43 9p: Reorganizatio... |
1356 |
err = 0; |
bd238fb43 9p: Reorganizatio... |
1357 1358 1359 1360 |
clnt = fid->clnt; if (fid->mode != -1) return -EINVAL; |
51a87c552 9p: rework client... |
1361 1362 1363 1364 1365 |
req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, mode, extension); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; |
bd238fb43 9p: Reorganizatio... |
1366 |
} |
342fee1d5 9P2010.L handshak... |
1367 |
err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
e7f4b8f1a 9p: Improve debug... |
1368 |
if (err) { |
348b59012 net/9p: Convert n... |
1369 |
trace_9p_protocol_dump(clnt, req->rc); |
e7f4b8f1a 9p: Improve debug... |
1370 1371 |
goto free_and_error; } |
51a87c552 9p: rework client... |
1372 |
|
5d3851530 9p: Reduce object... |
1373 1374 |
p9_debug(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x ", |
b0d5fdef5 net/9p: fix print... |
1375 1376 1377 |
qid.type, (unsigned long long)qid.path, qid.version, iounit); |
bd238fb43 9p: Reorganizatio... |
1378 1379 |
fid->mode = mode; |
51a87c552 9p: rework client... |
1380 |
fid->iounit = iounit; |
bd238fb43 9p: Reorganizatio... |
1381 |
|
e7f4b8f1a 9p: Improve debug... |
1382 1383 |
free_and_error: p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1384 |
error: |
bd238fb43 9p: Reorganizatio... |
1385 1386 1387 |
return err; } EXPORT_SYMBOL(p9_client_fcreate); |
7880b43bd 9p: constify ->d_... |
1388 1389 |
int p9_client_symlink(struct p9_fid *dfid, const char *name, const char *symtgt, kgid_t gid, struct p9_qid *qid) |
50cc42ff3 9p: Define and im... |
1390 1391 1392 1393 |
{ int err = 0; struct p9_client *clnt; struct p9_req_t *req; |
5d3851530 9p: Reduce object... |
1394 1395 |
p9_debug(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s ", |
50cc42ff3 9p: Define and im... |
1396 1397 |
dfid->fid, name, symtgt); clnt = dfid->clnt; |
f791f7c5e 9p: Transmit kuid... |
1398 |
req = p9_client_rpc(clnt, P9_TSYMLINK, "dssg", dfid->fid, name, symtgt, |
50cc42ff3 9p: Define and im... |
1399 1400 1401 1402 1403 1404 1405 1406 |
gid); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); if (err) { |
348b59012 net/9p: Convert n... |
1407 |
trace_9p_protocol_dump(clnt, req->rc); |
50cc42ff3 9p: Define and im... |
1408 1409 |
goto free_and_error; } |
5d3851530 9p: Reduce object... |
1410 1411 |
p9_debug(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x ", |
50cc42ff3 9p: Define and im... |
1412 1413 1414 1415 1416 1417 1418 1419 |
qid->type, (unsigned long long)qid->path, qid->version); free_and_error: p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_symlink); |
7880b43bd 9p: constify ->d_... |
1420 |
int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, const char *newname) |
652df9a7f 9p: Define and im... |
1421 1422 1423 |
{ struct p9_client *clnt; struct p9_req_t *req; |
5d3851530 9p: Reduce object... |
1424 1425 |
p9_debug(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s ", |
652df9a7f 9p: Define and im... |
1426 1427 1428 1429 1430 1431 |
dfid->fid, oldfid->fid, newname); clnt = dfid->clnt; req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, newname); if (IS_ERR(req)) return PTR_ERR(req); |
5d3851530 9p: Reduce object... |
1432 1433 |
p9_debug(P9_DEBUG_9P, "<<< RLINK "); |
652df9a7f 9p: Define and im... |
1434 1435 1436 1437 |
p9_free_req(clnt, req); return 0; } EXPORT_SYMBOL(p9_client_link); |
b165d6014 9p: Add datasync ... |
1438 |
int p9_client_fsync(struct p9_fid *fid, int datasync) |
920e65dc6 [9p] Introduce cl... |
1439 1440 1441 1442 |
{ int err; struct p9_client *clnt; struct p9_req_t *req; |
5d3851530 9p: Reduce object... |
1443 1444 |
p9_debug(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d ", |
b165d6014 9p: Add datasync ... |
1445 |
fid->fid, datasync); |
920e65dc6 [9p] Introduce cl... |
1446 1447 |
err = 0; clnt = fid->clnt; |
b165d6014 9p: Add datasync ... |
1448 |
req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync); |
920e65dc6 [9p] Introduce cl... |
1449 1450 1451 1452 |
if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
1453 1454 |
p9_debug(P9_DEBUG_9P, "<<< RFSYNC fid %d ", fid->fid); |
920e65dc6 [9p] Introduce cl... |
1455 1456 1457 1458 1459 1460 1461 |
p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_fsync); |
bd238fb43 9p: Reorganizatio... |
1462 1463 1464 |
int p9_client_clunk(struct p9_fid *fid) { int err; |
bd238fb43 9p: Reorganizatio... |
1465 |
struct p9_client *clnt; |
51a87c552 9p: rework client... |
1466 |
struct p9_req_t *req; |
208f3c28a net/9p: handle fl... |
1467 |
int retries = 0; |
bd238fb43 9p: Reorganizatio... |
1468 |
|
8e44a0805 net/9p: Add a War... |
1469 |
if (!fid) { |
5d3851530 9p: Reduce object... |
1470 1471 1472 |
pr_warn("%s (%d): Trying to clunk with NULL fid ", __func__, task_pid_nr(current)); |
8e44a0805 net/9p: Add a War... |
1473 1474 1475 |
dump_stack(); return 0; } |
208f3c28a net/9p: handle fl... |
1476 1477 1478 1479 |
again: p9_debug(P9_DEBUG_9P, ">>> TCLUNK fid %d (try %d) ", fid->fid, retries); |
bd238fb43 9p: Reorganizatio... |
1480 |
err = 0; |
bd238fb43 9p: Reorganizatio... |
1481 |
clnt = fid->clnt; |
51a87c552 9p: rework client... |
1482 1483 1484 1485 |
req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; |
bd238fb43 9p: Reorganizatio... |
1486 |
} |
5d3851530 9p: Reduce object... |
1487 1488 |
p9_debug(P9_DEBUG_9P, "<<< RCLUNK fid %d ", fid->fid); |
bd238fb43 9p: Reorganizatio... |
1489 |
|
51a87c552 9p: rework client... |
1490 |
p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1491 |
error: |
5034990e2 fs/9p: Fid is not... |
1492 1493 |
/* * Fid is not valid even after a failed clunk |
208f3c28a net/9p: handle fl... |
1494 1495 |
* If interrupted, retry once then give up and * leak fid until umount. |
5034990e2 fs/9p: Fid is not... |
1496 |
*/ |
208f3c28a net/9p: handle fl... |
1497 1498 1499 1500 1501 |
if (err == -ERESTARTSYS) { if (retries++ == 0) goto again; } else p9_fid_destroy(fid); |
bd238fb43 9p: Reorganizatio... |
1502 1503 1504 1505 1506 1507 1508 |
return err; } EXPORT_SYMBOL(p9_client_clunk); int p9_client_remove(struct p9_fid *fid) { int err; |
bd238fb43 9p: Reorganizatio... |
1509 |
struct p9_client *clnt; |
51a87c552 9p: rework client... |
1510 |
struct p9_req_t *req; |
bd238fb43 9p: Reorganizatio... |
1511 |
|
5d3851530 9p: Reduce object... |
1512 1513 |
p9_debug(P9_DEBUG_9P, ">>> TREMOVE fid %d ", fid->fid); |
bd238fb43 9p: Reorganizatio... |
1514 |
err = 0; |
bd238fb43 9p: Reorganizatio... |
1515 |
clnt = fid->clnt; |
51a87c552 9p: rework client... |
1516 1517 1518 1519 |
req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; |
bd238fb43 9p: Reorganizatio... |
1520 |
} |
5d3851530 9p: Reduce object... |
1521 1522 |
p9_debug(P9_DEBUG_9P, "<<< RREMOVE fid %d ", fid->fid); |
bd238fb43 9p: Reorganizatio... |
1523 |
|
51a87c552 9p: rework client... |
1524 |
p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1525 |
error: |
208f3c28a net/9p: handle fl... |
1526 1527 1528 1529 |
if (err == -ERESTARTSYS) p9_client_clunk(fid); else p9_fid_destroy(fid); |
bd238fb43 9p: Reorganizatio... |
1530 1531 1532 |
return err; } EXPORT_SYMBOL(p9_client_remove); |
48e370ff9 fs/9p: add 9P2000... |
1533 1534 1535 1536 1537 |
int p9_client_unlinkat(struct p9_fid *dfid, const char *name, int flags) { int err = 0; struct p9_req_t *req; struct p9_client *clnt; |
5d3851530 9p: Reduce object... |
1538 1539 |
p9_debug(P9_DEBUG_9P, ">>> TUNLINKAT fid %d %s %d ", |
48e370ff9 fs/9p: add 9P2000... |
1540 1541 1542 1543 1544 1545 1546 1547 |
dfid->fid, name, flags); clnt = dfid->clnt; req = p9_client_rpc(clnt, P9_TUNLINKAT, "dsd", dfid->fid, name, flags); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
1548 1549 |
p9_debug(P9_DEBUG_9P, "<<< RUNLINKAT fid %d %s ", dfid->fid, name); |
48e370ff9 fs/9p: add 9P2000... |
1550 1551 1552 1553 1554 1555 |
p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_unlinkat); |
0fc9655ec 9p: consolidate r... |
1556 |
int |
e1200fe68 9p: switch p9_cli... |
1557 |
p9_client_read(struct p9_fid *fid, u64 offset, struct iov_iter *to, int *err) |
bd238fb43 9p: Reorganizatio... |
1558 |
{ |
e1200fe68 9p: switch p9_cli... |
1559 |
struct p9_client *clnt = fid->clnt; |
abfa034e4 fs/9p: Update zer... |
1560 |
struct p9_req_t *req; |
e1200fe68 9p: switch p9_cli... |
1561 |
int total = 0; |
999b8b88c 9p: ensure err is... |
1562 |
*err = 0; |
bd238fb43 9p: Reorganizatio... |
1563 |
|
5d3851530 9p: Reduce object... |
1564 1565 |
p9_debug(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d ", |
e1200fe68 9p: switch p9_cli... |
1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 |
fid->fid, (unsigned long long) offset, (int)iov_iter_count(to)); while (iov_iter_count(to)) { int count = iov_iter_count(to); int rsize, non_zc = 0; char *dataptr; rsize = fid->iounit; if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) rsize = clnt->msize - P9_IOHDRSZ; if (count < rsize) rsize = count; /* Don't bother zerocopy for small IO (< 1024) */ if (clnt->trans_mod->zc_request && rsize > 1024) { /* * response header len is 11 * PDU Header(7) + IO Size (4) */ req = p9_client_zc_rpc(clnt, P9_TREAD, to, NULL, rsize, 0, 11, "dqd", fid->fid, offset, rsize); } else { non_zc = 1; req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); } if (IS_ERR(req)) { *err = PTR_ERR(req); break; } |
bd238fb43 9p: Reorganizatio... |
1598 |
|
e1200fe68 9p: switch p9_cli... |
1599 1600 1601 1602 1603 1604 1605 |
*err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); if (*err) { trace_9p_protocol_dump(clnt, req->rc); p9_free_req(clnt, req); break; } |
0f1db7dee 9p: cope with bog... |
1606 1607 1608 1609 1610 |
if (rsize < count) { pr_err("bogus RREAD count (%d > %d) ", count, rsize); count = rsize; } |
bd238fb43 9p: Reorganizatio... |
1611 |
|
e1200fe68 9p: switch p9_cli... |
1612 1613 1614 1615 1616 1617 |
p9_debug(P9_DEBUG_9P, "<<< RREAD count %d ", count); if (!count) { p9_free_req(clnt, req); break; } |
bd238fb43 9p: Reorganizatio... |
1618 |
|
e1200fe68 9p: switch p9_cli... |
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 |
if (non_zc) { int n = copy_to_iter(dataptr, count, to); total += n; offset += n; if (n != count) { *err = -EFAULT; p9_free_req(clnt, req); break; } } else { iov_iter_advance(to, count); total += count; offset += count; } p9_free_req(clnt, req); |
51a87c552 9p: rework client... |
1634 |
} |
e1200fe68 9p: switch p9_cli... |
1635 |
return total; |
bd238fb43 9p: Reorganizatio... |
1636 |
} |
0fc9655ec 9p: consolidate r... |
1637 |
EXPORT_SYMBOL(p9_client_read); |
bd238fb43 9p: Reorganizatio... |
1638 1639 |
int |
070b3656c 9p: switch p9_cli... |
1640 |
p9_client_write(struct p9_fid *fid, u64 offset, struct iov_iter *from, int *err) |
bd238fb43 9p: Reorganizatio... |
1641 |
{ |
070b3656c 9p: switch p9_cli... |
1642 |
struct p9_client *clnt = fid->clnt; |
51a87c552 9p: rework client... |
1643 |
struct p9_req_t *req; |
070b3656c 9p: switch p9_cli... |
1644 |
int total = 0; |
999b8b88c 9p: ensure err is... |
1645 |
*err = 0; |
070b3656c 9p: switch p9_cli... |
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 |
p9_debug(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %zd ", fid->fid, (unsigned long long) offset, iov_iter_count(from)); while (iov_iter_count(from)) { int count = iov_iter_count(from); int rsize = fid->iounit; if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) rsize = clnt->msize - P9_IOHDRSZ; if (count < rsize) rsize = count; /* Don't bother zerocopy for small IO (< 1024) */ if (clnt->trans_mod->zc_request && rsize > 1024) { req = p9_client_zc_rpc(clnt, P9_TWRITE, NULL, from, 0, rsize, P9_ZC_HDR_SZ, "dqd", fid->fid, offset, rsize); } else { req = p9_client_rpc(clnt, P9_TWRITE, "dqV", fid->fid, offset, rsize, from); } if (IS_ERR(req)) { *err = PTR_ERR(req); break; } |
bd238fb43 9p: Reorganizatio... |
1674 |
|
070b3656c 9p: switch p9_cli... |
1675 1676 1677 1678 |
*err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); if (*err) { trace_9p_protocol_dump(clnt, req->rc); p9_free_req(clnt, req); |
67e808fbb p9_client_write()... |
1679 |
break; |
070b3656c 9p: switch p9_cli... |
1680 |
} |
0f1db7dee 9p: cope with bog... |
1681 1682 1683 1684 1685 |
if (rsize < count) { pr_err("bogus RWRITE count (%d > %d) ", count, rsize); count = rsize; } |
1fc52481c [net/9p] Write si... |
1686 |
|
070b3656c 9p: switch p9_cli... |
1687 1688 |
p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d ", count); |
0fc9655ec 9p: consolidate r... |
1689 |
|
070b3656c 9p: switch p9_cli... |
1690 1691 1692 1693 |
p9_free_req(clnt, req); iov_iter_advance(from, count); total += count; offset += count; |
e7f4b8f1a 9p: Improve debug... |
1694 |
} |
070b3656c 9p: switch p9_cli... |
1695 |
return total; |
bd238fb43 9p: Reorganizatio... |
1696 |
} |
0fc9655ec 9p: consolidate r... |
1697 |
EXPORT_SYMBOL(p9_client_write); |
bd238fb43 9p: Reorganizatio... |
1698 |
|
51a87c552 9p: rework client... |
1699 |
struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
5503ac565 9p: remove unnece... |
1700 |
{ |
51a87c552 9p: rework client... |
1701 1702 1703 1704 1705 |
int err; struct p9_client *clnt; struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); struct p9_req_t *req; u16 ignored; |
5503ac565 9p: remove unnece... |
1706 |
|
5d3851530 9p: Reduce object... |
1707 1708 |
p9_debug(P9_DEBUG_9P, ">>> TSTAT fid %d ", fid->fid); |
5503ac565 9p: remove unnece... |
1709 |
|
5503ac565 9p: remove unnece... |
1710 1711 |
if (!ret) return ERR_PTR(-ENOMEM); |
bd238fb43 9p: Reorganizatio... |
1712 |
err = 0; |
bd238fb43 9p: Reorganizatio... |
1713 |
clnt = fid->clnt; |
51a87c552 9p: rework client... |
1714 1715 1716 |
req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); if (IS_ERR(req)) { err = PTR_ERR(req); |
bd238fb43 9p: Reorganizatio... |
1717 1718 |
goto error; } |
342fee1d5 9P2010.L handshak... |
1719 |
err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
e7f4b8f1a 9p: Improve debug... |
1720 |
if (err) { |
348b59012 net/9p: Convert n... |
1721 |
trace_9p_protocol_dump(clnt, req->rc); |
eedfe1c42 9p: Possible regr... |
1722 1723 |
p9_free_req(clnt, req); goto error; |
e7f4b8f1a 9p: Improve debug... |
1724 |
} |
bd238fb43 9p: Reorganizatio... |
1725 |
|
5d3851530 9p: Reduce object... |
1726 |
p9_debug(P9_DEBUG_9P, |
e7f4b8f1a 9p: Improve debug... |
1727 1728 1729 1730 1731 1732 1733 1734 |
"<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x " "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx " "<<< name=%s uid=%s gid=%s muid=%s extension=(%s) " "<<< uid=%d gid=%d n_muid=%d ", |
51a87c552 9p: rework client... |
1735 |
ret->size, ret->type, ret->dev, ret->qid.type, |
b0d5fdef5 net/9p: fix print... |
1736 1737 1738 |
(unsigned long long)ret->qid.path, ret->qid.version, ret->mode, ret->atime, ret->mtime, (unsigned long long)ret->length, ret->name, ret->uid, ret->gid, ret->muid, ret->extension, |
447c50943 9p: Modify the st... |
1739 1740 1741 |
from_kuid(&init_user_ns, ret->n_uid), from_kgid(&init_user_ns, ret->n_gid), from_kuid(&init_user_ns, ret->n_muid)); |
bd238fb43 9p: Reorganizatio... |
1742 |
|
742b11a7e net/9p: return er... |
1743 1744 |
p9_free_req(clnt, req); return ret; |
bd238fb43 9p: Reorganizatio... |
1745 |
error: |
742b11a7e net/9p: return er... |
1746 1747 |
kfree(ret); return ERR_PTR(err); |
bd238fb43 9p: Reorganizatio... |
1748 1749 |
} EXPORT_SYMBOL(p9_client_stat); |
f08531220 9p: getattr clien... |
1750 1751 1752 1753 1754 1755 1756 1757 |
struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, u64 request_mask) { int err; struct p9_client *clnt; struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), GFP_KERNEL); struct p9_req_t *req; |
5d3851530 9p: Reduce object... |
1758 1759 |
p9_debug(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld ", |
f08531220 9p: getattr clien... |
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 |
fid->fid, request_mask); if (!ret) return ERR_PTR(-ENOMEM); err = 0; clnt = fid->clnt; req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); if (err) { |
348b59012 net/9p: Convert n... |
1776 |
trace_9p_protocol_dump(clnt, req->rc); |
f08531220 9p: getattr clien... |
1777 1778 1779 |
p9_free_req(clnt, req); goto error; } |
5d3851530 9p: Reduce object... |
1780 |
p9_debug(P9_DEBUG_9P, |
f08531220 9p: getattr clien... |
1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 |
"<<< RGETATTR st_result_mask=%lld " "<<< qid=%x.%llx.%x " "<<< st_mode=%8.8x st_nlink=%llu " "<<< st_uid=%d st_gid=%d " "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu " "<<< st_atime_sec=%lld st_atime_nsec=%lld " "<<< st_mtime_sec=%lld st_mtime_nsec=%lld " "<<< st_ctime_sec=%lld st_ctime_nsec=%lld " "<<< st_btime_sec=%lld st_btime_nsec=%lld " "<<< st_gen=%lld st_data_version=%lld", ret->st_result_mask, ret->qid.type, ret->qid.path, |
447c50943 9p: Modify the st... |
1801 1802 1803 1804 |
ret->qid.version, ret->st_mode, ret->st_nlink, from_kuid(&init_user_ns, ret->st_uid), from_kgid(&init_user_ns, ret->st_gid), ret->st_rdev, ret->st_size, ret->st_blksize, |
f08531220 9p: getattr clien... |
1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 |
ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, ret->st_gen, ret->st_data_version); p9_free_req(clnt, req); return ret; error: kfree(ret); return ERR_PTR(err); } EXPORT_SYMBOL(p9_client_getattr_dotl); |
342fee1d5 9P2010.L handshak... |
1818 |
static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
453ed90d1 net/9p: set corre... |
1819 1820 |
{ int ret; |
9d6939dac net/9p: fix stats... |
1821 |
/* NOTE: size shouldn't include its own length */ |
453ed90d1 net/9p: set corre... |
1822 1823 1824 |
/* size[2] type[2] dev[4] qid[13] */ /* mode[4] atime[4] mtime[4] length[8]*/ /* name[s] uid[s] gid[s] muid[s] */ |
9d6939dac net/9p: fix stats... |
1825 |
ret = 2+4+13+4+4+4+8+2+2+2+2; |
453ed90d1 net/9p: set corre... |
1826 1827 1828 1829 1830 1831 1832 1833 1834 |
if (wst->name) ret += strlen(wst->name); if (wst->uid) ret += strlen(wst->uid); if (wst->gid) ret += strlen(wst->gid); if (wst->muid) ret += strlen(wst->muid); |
c56e4acf5 9p: VFS switches ... |
1835 1836 |
if ((proto_version == p9_proto_2000u) || (proto_version == p9_proto_2000L)) { |
453ed90d1 net/9p: set corre... |
1837 1838 1839 1840 1841 1842 1843 |
ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ if (wst->extension) ret += strlen(wst->extension); } return ret; } |
bd238fb43 9p: Reorganizatio... |
1844 1845 1846 |
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) { int err; |
51a87c552 9p: rework client... |
1847 |
struct p9_req_t *req; |
bd238fb43 9p: Reorganizatio... |
1848 |
struct p9_client *clnt; |
453ed90d1 net/9p: set corre... |
1849 1850 |
err = 0; clnt = fid->clnt; |
342fee1d5 9P2010.L handshak... |
1851 |
wst->size = p9_client_statsize(wst, clnt->proto_version); |
5d3851530 9p: Reduce object... |
1852 1853 1854 |
p9_debug(P9_DEBUG_9P, ">>> TWSTAT fid %d ", fid->fid); p9_debug(P9_DEBUG_9P, |
e7f4b8f1a 9p: Improve debug... |
1855 1856 1857 1858 1859 1860 1861 1862 1863 |
" sz=%x type=%x dev=%x qid=%x.%llx.%x " " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx " " name=%s uid=%s gid=%s muid=%s extension=(%s) " " uid=%d gid=%d n_muid=%d ", wst->size, wst->type, wst->dev, wst->qid.type, |
b0d5fdef5 net/9p: fix print... |
1864 1865 1866 |
(unsigned long long)wst->qid.path, wst->qid.version, wst->mode, wst->atime, wst->mtime, (unsigned long long)wst->length, wst->name, wst->uid, wst->gid, wst->muid, wst->extension, |
447c50943 9p: Modify the st... |
1867 1868 1869 |
from_kuid(&init_user_ns, wst->n_uid), from_kgid(&init_user_ns, wst->n_gid), from_kuid(&init_user_ns, wst->n_muid)); |
bd238fb43 9p: Reorganizatio... |
1870 |
|
9d6939dac net/9p: fix stats... |
1871 |
req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
51a87c552 9p: rework client... |
1872 1873 1874 |
if (IS_ERR(req)) { err = PTR_ERR(req); goto error; |
bd238fb43 9p: Reorganizatio... |
1875 |
} |
5d3851530 9p: Reduce object... |
1876 1877 |
p9_debug(P9_DEBUG_9P, "<<< RWSTAT fid %d ", fid->fid); |
bd238fb43 9p: Reorganizatio... |
1878 |
|
51a87c552 9p: rework client... |
1879 1880 |
p9_free_req(clnt, req); error: |
bd238fb43 9p: Reorganizatio... |
1881 1882 1883 |
return err; } EXPORT_SYMBOL(p9_client_wstat); |
bda8e7752 9p: add 9P2000.L ... |
1884 |
|
87d7845aa 9p: Implement cli... |
1885 1886 1887 1888 1889 1890 1891 1892 |
int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) { int err; struct p9_req_t *req; struct p9_client *clnt; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
1893 1894 1895 |
p9_debug(P9_DEBUG_9P, ">>> TSETATTR fid %d ", fid->fid); p9_debug(P9_DEBUG_9P, |
87d7845aa 9p: Implement cli... |
1896 1897 1898 1899 1900 1901 |
" valid=%x mode=%x uid=%d gid=%d size=%lld " " atime_sec=%lld atime_nsec=%lld " " mtime_sec=%lld mtime_nsec=%lld ", |
447c50943 9p: Modify the st... |
1902 1903 1904 |
p9attr->valid, p9attr->mode, from_kuid(&init_user_ns, p9attr->uid), from_kgid(&init_user_ns, p9attr->gid), |
87d7845aa 9p: Implement cli... |
1905 1906 1907 1908 1909 1910 1911 1912 1913 |
p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, p9attr->mtime_sec, p9attr->mtime_nsec); req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
1914 1915 |
p9_debug(P9_DEBUG_9P, "<<< RSETATTR fid %d ", fid->fid); |
87d7845aa 9p: Implement cli... |
1916 1917 1918 1919 1920 |
p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_setattr); |
bda8e7752 9p: add 9P2000.L ... |
1921 1922 1923 1924 1925 1926 1927 1928 |
int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) { int err; struct p9_req_t *req; struct p9_client *clnt; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
1929 1930 |
p9_debug(P9_DEBUG_9P, ">>> TSTATFS fid %d ", fid->fid); |
bda8e7752 9p: add 9P2000.L ... |
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 |
req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); if (err) { |
348b59012 net/9p: Convert n... |
1942 |
trace_9p_protocol_dump(clnt, req->rc); |
bda8e7752 9p: add 9P2000.L ... |
1943 1944 1945 |
p9_free_req(clnt, req); goto error; } |
5d3851530 9p: Reduce object... |
1946 |
p9_debug(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
bda8e7752 9p: add 9P2000.L ... |
1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 |
"blocks %llu bfree %llu bavail %llu files %llu ffree %llu " "fsid %llu namelen %ld ", fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, sb->fsid, (long int)sb->namelen); p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_statfs); |
4681dbdac 9p: add 9P2000.L ... |
1959 |
|
9e8fb38e7 fs/9p: add 9P2000... |
1960 1961 |
int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, const char *name) |
4681dbdac 9p: add 9P2000.L ... |
1962 1963 1964 1965 1966 1967 1968 |
{ int err; struct p9_req_t *req; struct p9_client *clnt; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
1969 1970 |
p9_debug(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s ", |
4681dbdac 9p: add 9P2000.L ... |
1971 1972 1973 1974 1975 1976 1977 1978 |
fid->fid, newdirfid->fid, name); req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, newdirfid->fid, name); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
1979 1980 |
p9_debug(P9_DEBUG_9P, "<<< RRENAME fid %d ", fid->fid); |
4681dbdac 9p: add 9P2000.L ... |
1981 1982 1983 1984 1985 1986 |
p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_rename); |
9e8fb38e7 fs/9p: add 9P2000... |
1987 1988 1989 1990 1991 1992 1993 1994 1995 |
int p9_client_renameat(struct p9_fid *olddirfid, const char *old_name, struct p9_fid *newdirfid, const char *new_name) { int err; struct p9_req_t *req; struct p9_client *clnt; err = 0; clnt = olddirfid->clnt; |
5d3851530 9p: Reduce object... |
1996 |
p9_debug(P9_DEBUG_9P, ">>> TRENAMEAT olddirfid %d old name %s" |
9e8fb38e7 fs/9p: add 9P2000... |
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 |
" newdirfid %d new name %s ", olddirfid->fid, old_name, newdirfid->fid, new_name); req = p9_client_rpc(clnt, P9_TRENAMEAT, "dsds", olddirfid->fid, old_name, newdirfid->fid, new_name); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
2007 2008 |
p9_debug(P9_DEBUG_9P, "<<< RRENAMEAT newdirfid %d new name %s ", |
9e8fb38e7 fs/9p: add 9P2000... |
2009 2010 2011 2012 2013 2014 2015 |
newdirfid->fid, new_name); p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_renameat); |
0ef63f345 net/9p: Implement... |
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 |
/* * An xattrwalk without @attr_name gives the fid for the lisxattr namespace */ struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, const char *attr_name, u64 *attr_size) { int err; struct p9_req_t *req; struct p9_client *clnt; struct p9_fid *attr_fid; err = 0; clnt = file_fid->clnt; attr_fid = p9_fid_create(clnt); if (IS_ERR(attr_fid)) { err = PTR_ERR(attr_fid); attr_fid = NULL; goto error; } |
5d3851530 9p: Reduce object... |
2035 |
p9_debug(P9_DEBUG_9P, |
0ef63f345 net/9p: Implement... |
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 |
">>> TXATTRWALK file_fid %d, attr_fid %d name %s ", file_fid->fid, attr_fid->fid, attr_name); req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", file_fid->fid, attr_fid->fid, attr_name); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); if (err) { |
348b59012 net/9p: Convert n... |
2048 |
trace_9p_protocol_dump(clnt, req->rc); |
0ef63f345 net/9p: Implement... |
2049 2050 2051 2052 |
p9_free_req(clnt, req); goto clunk_fid; } p9_free_req(clnt, req); |
5d3851530 9p: Reduce object... |
2053 2054 |
p9_debug(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu ", |
0ef63f345 net/9p: Implement... |
2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 |
attr_fid->fid, *attr_size); return attr_fid; clunk_fid: p9_client_clunk(attr_fid); attr_fid = NULL; error: if (attr_fid && (attr_fid != file_fid)) p9_fid_destroy(attr_fid); return ERR_PTR(err); } EXPORT_SYMBOL_GPL(p9_client_xattrwalk); |
eda25e461 net/9p: Implement... |
2067 2068 2069 2070 2071 2072 |
int p9_client_xattrcreate(struct p9_fid *fid, const char *name, u64 attr_size, int flags) { int err; struct p9_req_t *req; struct p9_client *clnt; |
5d3851530 9p: Reduce object... |
2073 |
p9_debug(P9_DEBUG_9P, |
eda25e461 net/9p: Implement... |
2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 |
">>> TXATTRCREATE fid %d name %s size %lld flag %d ", fid->fid, name, (long long)attr_size, flags); err = 0; clnt = fid->clnt; req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", fid->fid, name, attr_size, flags); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } |
5d3851530 9p: Reduce object... |
2085 2086 |
p9_debug(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d ", fid->fid); |
eda25e461 net/9p: Implement... |
2087 2088 2089 2090 2091 |
p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL_GPL(p9_client_xattrcreate); |
7751bdb3a 9p: readdir imple... |
2092 2093 |
int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) { |
abfa034e4 fs/9p: Update zer... |
2094 |
int err, rsize, non_zc = 0; |
7751bdb3a 9p: readdir imple... |
2095 2096 2097 |
struct p9_client *clnt; struct p9_req_t *req; char *dataptr; |
4f3b35c15 net/9p: switch th... |
2098 2099 2100 2101 |
struct kvec kv = {.iov_base = data, .iov_len = count}; struct iov_iter to; iov_iter_kvec(&to, READ | ITER_KVEC, &kv, 1, count); |
7751bdb3a 9p: readdir imple... |
2102 |
|
5d3851530 9p: Reduce object... |
2103 2104 |
p9_debug(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d ", |
95c961747 net: cleanup unsi... |
2105 |
fid->fid, (unsigned long long) offset, count); |
7751bdb3a 9p: readdir imple... |
2106 2107 2108 |
err = 0; clnt = fid->clnt; |
7751bdb3a 9p: readdir imple... |
2109 2110 2111 2112 2113 2114 2115 |
rsize = fid->iounit; if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) rsize = clnt->msize - P9_READDIRHDRSZ; if (count < rsize) rsize = count; |
abfa034e4 fs/9p: Update zer... |
2116 2117 2118 2119 2120 2121 |
/* Don't bother zerocopy for small IO (< 1024) */ if (clnt->trans_mod->zc_request && rsize > 1024) { /* * response header len is 11 * PDU Header(7) + IO Size (4) */ |
4f3b35c15 net/9p: switch th... |
2122 2123 |
req = p9_client_zc_rpc(clnt, P9_TREADDIR, &to, NULL, rsize, 0, 11, "dqd", fid->fid, offset, rsize); |
2c66523fd [net/9p] readdir ... |
2124 |
} else { |
abfa034e4 fs/9p: Update zer... |
2125 |
non_zc = 1; |
2c66523fd [net/9p] readdir ... |
2126 |
req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, |
abfa034e4 fs/9p: Update zer... |
2127 |
offset, rsize); |
2c66523fd [net/9p] readdir ... |
2128 |
} |
7751bdb3a 9p: readdir imple... |
2129 2130 2131 2132 2133 2134 2135 |
if (IS_ERR(req)) { err = PTR_ERR(req); goto error; } err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); if (err) { |
348b59012 net/9p: Convert n... |
2136 |
trace_9p_protocol_dump(clnt, req->rc); |
7751bdb3a 9p: readdir imple... |
2137 2138 |
goto free_and_error; } |
71d6ad083 p9_client_readdir... |
2139 2140 2141 2142 2143 |
if (rsize < count) { pr_err("bogus RREADDIR count (%d > %d) ", count, rsize); count = rsize; } |
7751bdb3a 9p: readdir imple... |
2144 |
|
5d3851530 9p: Reduce object... |
2145 2146 |
p9_debug(P9_DEBUG_9P, "<<< RREADDIR count %d ", count); |
7751bdb3a 9p: readdir imple... |
2147 |
|
abfa034e4 fs/9p: Update zer... |
2148 |
if (non_zc) |
7751bdb3a 9p: readdir imple... |
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 |
memmove(data, dataptr, count); p9_free_req(clnt, req); return count; free_and_error: p9_free_req(clnt, req); error: return err; } EXPORT_SYMBOL(p9_client_readdir); |
4b43516ab 9p: Implement TMKNOD |
2160 |
|
7880b43bd 9p: constify ->d_... |
2161 |
int p9_client_mknod_dotl(struct p9_fid *fid, const char *name, int mode, |
f791f7c5e 9p: Transmit kuid... |
2162 |
dev_t rdev, kgid_t gid, struct p9_qid *qid) |
4b43516ab 9p: Implement TMKNOD |
2163 2164 2165 2166 2167 2168 2169 |
{ int err; struct p9_client *clnt; struct p9_req_t *req; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
2170 |
p9_debug(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
4b43516ab 9p: Implement TMKNOD |
2171 2172 |
"minor %d ", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
f791f7c5e 9p: Transmit kuid... |
2173 |
req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddg", fid->fid, name, mode, |
4b43516ab 9p: Implement TMKNOD |
2174 2175 2176 2177 2178 2179 |
MAJOR(rdev), MINOR(rdev), gid); if (IS_ERR(req)) return PTR_ERR(req); err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); if (err) { |
348b59012 net/9p: Convert n... |
2180 |
trace_9p_protocol_dump(clnt, req->rc); |
4b43516ab 9p: Implement TMKNOD |
2181 2182 |
goto error; } |
5d3851530 9p: Reduce object... |
2183 2184 |
p9_debug(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x ", qid->type, |
4b43516ab 9p: Implement TMKNOD |
2185 2186 2187 2188 2189 2190 2191 2192 |
(unsigned long long)qid->path, qid->version); error: p9_free_req(clnt, req); return err; } EXPORT_SYMBOL(p9_client_mknod_dotl); |
01a622bd7 9p: Implement TMKDIR |
2193 |
|
7880b43bd 9p: constify ->d_... |
2194 |
int p9_client_mkdir_dotl(struct p9_fid *fid, const char *name, int mode, |
f791f7c5e 9p: Transmit kuid... |
2195 |
kgid_t gid, struct p9_qid *qid) |
01a622bd7 9p: Implement TMKDIR |
2196 2197 2198 2199 2200 2201 2202 |
{ int err; struct p9_client *clnt; struct p9_req_t *req; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
2203 2204 |
p9_debug(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d ", |
f791f7c5e 9p: Transmit kuid... |
2205 2206 |
fid->fid, name, mode, from_kgid(&init_user_ns, gid)); req = p9_client_rpc(clnt, P9_TMKDIR, "dsdg", fid->fid, name, mode, |
01a622bd7 9p: Implement TMKDIR |
2207 2208 2209 2210 2211 2212 |
gid); if (IS_ERR(req)) return PTR_ERR(req); err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); if (err) { |
348b59012 net/9p: Convert n... |
2213 |
trace_9p_protocol_dump(clnt, req->rc); |
01a622bd7 9p: Implement TMKDIR |
2214 2215 |
goto error; } |
5d3851530 9p: Reduce object... |
2216 2217 |
p9_debug(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x ", qid->type, |
01a622bd7 9p: Implement TMKDIR |
2218 2219 2220 2221 2222 2223 2224 2225 |
(unsigned long long)qid->path, qid->version); error: p9_free_req(clnt, req); return err; } EXPORT_SYMBOL(p9_client_mkdir_dotl); |
a099027c7 9p: Implement TLOCK |
2226 2227 2228 2229 2230 2231 2232 2233 2234 |
int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) { int err; struct p9_client *clnt; struct p9_req_t *req; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
2235 |
p9_debug(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
a099027c7 9p: Implement TLOCK |
2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 |
"start %lld length %lld proc_id %d client_id %s ", fid->fid, flock->type, flock->flags, flock->start, flock->length, flock->proc_id, flock->client_id); req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, flock->flags, flock->start, flock->length, flock->proc_id, flock->client_id); if (IS_ERR(req)) return PTR_ERR(req); err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); if (err) { |
348b59012 net/9p: Convert n... |
2250 |
trace_9p_protocol_dump(clnt, req->rc); |
a099027c7 9p: Implement TLOCK |
2251 2252 |
goto error; } |
5d3851530 9p: Reduce object... |
2253 2254 |
p9_debug(P9_DEBUG_9P, "<<< RLOCK status %i ", *status); |
a099027c7 9p: Implement TLOCK |
2255 2256 2257 2258 2259 2260 |
error: p9_free_req(clnt, req); return err; } EXPORT_SYMBOL(p9_client_lock_dotl); |
1d769cd19 9p: Implement TGE... |
2261 2262 2263 2264 2265 2266 2267 2268 2269 |
int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) { int err; struct p9_client *clnt; struct p9_req_t *req; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
2270 |
p9_debug(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
1d769cd19 9p: Implement TGE... |
2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 |
"length %lld proc_id %d client_id %s ", fid->fid, glock->type, glock->start, glock->length, glock->proc_id, glock->client_id); req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, glock->start, glock->length, glock->proc_id, glock->client_id); if (IS_ERR(req)) return PTR_ERR(req); err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, &glock->start, &glock->length, &glock->proc_id, &glock->client_id); if (err) { |
348b59012 net/9p: Convert n... |
2285 |
trace_9p_protocol_dump(clnt, req->rc); |
1d769cd19 9p: Implement TGE... |
2286 2287 |
goto error; } |
5d3851530 9p: Reduce object... |
2288 |
p9_debug(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
1d769cd19 9p: Implement TGE... |
2289 2290 2291 2292 2293 2294 2295 2296 |
"proc_id %d client_id %s ", glock->type, glock->start, glock->length, glock->proc_id, glock->client_id); error: p9_free_req(clnt, req); return err; } EXPORT_SYMBOL(p9_client_getlock_dotl); |
329176cc2 9p: Implement TRE... |
2297 2298 2299 2300 2301 2302 2303 2304 2305 |
int p9_client_readlink(struct p9_fid *fid, char **target) { int err; struct p9_client *clnt; struct p9_req_t *req; err = 0; clnt = fid->clnt; |
5d3851530 9p: Reduce object... |
2306 2307 |
p9_debug(P9_DEBUG_9P, ">>> TREADLINK fid %d ", fid->fid); |
329176cc2 9p: Implement TRE... |
2308 2309 2310 2311 2312 2313 2314 |
req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); if (IS_ERR(req)) return PTR_ERR(req); err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); if (err) { |
348b59012 net/9p: Convert n... |
2315 |
trace_9p_protocol_dump(clnt, req->rc); |
329176cc2 9p: Implement TRE... |
2316 2317 |
goto error; } |
5d3851530 9p: Reduce object... |
2318 2319 |
p9_debug(P9_DEBUG_9P, "<<< RREADLINK target %s ", *target); |
329176cc2 9p: Implement TRE... |
2320 2321 2322 2323 2324 |
error: p9_free_req(clnt, req); return err; } EXPORT_SYMBOL(p9_client_readlink); |