| /* |
| * net/9p/clnt.c |
| * |
| * 9P Client |
| * |
| * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> |
| * 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 |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/fs.h> |
| #include <linux/poll.h> |
| #include <linux/idr.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| #include <linux/uaccess.h> |
| #include <net/9p/9p.h> |
| #include <linux/parser.h> |
| #include <net/9p/client.h> |
| #include <net/9p/transport.h> |
| #include "protocol.h" |
| |
| /* |
| * Client Option Parsing (code inspired by NFS code) |
| * - a little lazy - parse all client options |
| */ |
| |
| enum { |
| Opt_msize, |
| Opt_trans, |
| Opt_legacy, |
| Opt_version, |
| Opt_err, |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_msize, "msize=%u"}, |
| {Opt_legacy, "noextend"}, |
| {Opt_trans, "trans=%s"}, |
| {Opt_version, "version=%s"}, |
| {Opt_err, NULL}, |
| }; |
| |
| inline int p9_is_proto_dotl(struct p9_client *clnt) |
| { |
| return clnt->proto_version == p9_proto_2000L; |
| } |
| EXPORT_SYMBOL(p9_is_proto_dotl); |
| |
| inline int p9_is_proto_dotu(struct p9_client *clnt) |
| { |
| return clnt->proto_version == p9_proto_2000u; |
| } |
| EXPORT_SYMBOL(p9_is_proto_dotu); |
| |
| /* Interpret mount option for protocol version */ |
| static int get_protocol_version(const substring_t *name) |
| { |
| int version = -EINVAL; |
| |
| if (!strncmp("9p2000", name->from, name->to-name->from)) { |
| version = p9_proto_legacy; |
| P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); |
| } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { |
| version = p9_proto_2000u; |
| P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); |
| } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { |
| version = p9_proto_2000L; |
| P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); |
| } else { |
| P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", |
| name->from); |
| } |
| return version; |
| } |
| |
| static struct p9_req_t * |
| p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); |
| |
| /** |
| * parse_options - parse mount options into client structure |
| * @opts: options string passed from mount |
| * @clnt: existing v9fs client information |
| * |
| * Return 0 upon success, -ERRNO upon failure |
| */ |
| |
| static int parse_opts(char *opts, struct p9_client *clnt) |
| { |
| char *options, *tmp_options; |
| char *p; |
| substring_t args[MAX_OPT_ARGS]; |
| int option; |
| int ret = 0; |
| |
| clnt->proto_version = p9_proto_2000u; |
| clnt->msize = 8192; |
| |
| if (!opts) |
| return 0; |
| |
| tmp_options = kstrdup(opts, GFP_KERNEL); |
| if (!tmp_options) { |
| P9_DPRINTK(P9_DEBUG_ERROR, |
| "failed to allocate copy of option string\n"); |
| return -ENOMEM; |
| } |
| options = tmp_options; |
| |
| while ((p = strsep(&options, ",")) != NULL) { |
| int token; |
| if (!*p) |
| continue; |
| token = match_token(p, tokens, args); |
| if (token < Opt_trans) { |
| int r = match_int(&args[0], &option); |
| if (r < 0) { |
| P9_DPRINTK(P9_DEBUG_ERROR, |
| "integer field, but no integer?\n"); |
| ret = r; |
| continue; |
| } |
| } |
| switch (token) { |
| case Opt_msize: |
| clnt->msize = option; |
| break; |
| case Opt_trans: |
| clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); |
| if(clnt->trans_mod == NULL) { |
| P9_DPRINTK(P9_DEBUG_ERROR, |
| "Could not find request transport: %s\n", |
| (char *) &args[0]); |
| ret = -EINVAL; |
| goto free_and_return; |
| } |
| break; |
| case Opt_legacy: |
| clnt->proto_version = p9_proto_legacy; |
| break; |
| case Opt_version: |
| ret = get_protocol_version(&args[0]); |
| if (ret == -EINVAL) |
| goto free_and_return; |
| clnt->proto_version = ret; |
| break; |
| default: |
| continue; |
| } |
| } |
| |
| free_and_return: |
| kfree(tmp_options); |
| return ret; |
| } |
| |
| /** |
| * 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 |
| * request_slots as necessary to accomodate transaction |
| * 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. |
| * |
| */ |
| |
| static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) |
| { |
| unsigned long flags; |
| int row, col; |
| struct p9_req_t *req; |
| |
| /* 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]) { |
| printk(KERN_ERR "Couldn't grow tag array\n"); |
| spin_unlock_irqrestore(&c->lock, flags); |
| return ERR_PTR(-ENOMEM); |
| } |
| for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| c->reqs[row][col].status = REQ_STATUS_IDLE; |
| c->reqs[row][col].tc = NULL; |
| } |
| c->max_tag += P9_ROW_MAXTAG; |
| } |
| spin_unlock_irqrestore(&c->lock, flags); |
| } |
| row = tag / P9_ROW_MAXTAG; |
| col = tag % P9_ROW_MAXTAG; |
| |
| req = &c->reqs[row][col]; |
| if (!req->tc) { |
| req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); |
| if (!req->wq) { |
| printk(KERN_ERR "Couldn't grow tag array\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| init_waitqueue_head(req->wq); |
| req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, |
| GFP_KERNEL); |
| req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, |
| GFP_KERNEL); |
| if ((!req->tc) || (!req->rc)) { |
| printk(KERN_ERR "Couldn't grow tag array\n"); |
| kfree(req->tc); |
| kfree(req->rc); |
| kfree(req->wq); |
| req->tc = req->rc = NULL; |
| req->wq = NULL; |
| return ERR_PTR(-ENOMEM); |
| } |
| req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); |
| req->tc->capacity = c->msize; |
| req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); |
| req->rc->capacity = c->msize; |
| } |
| |
| p9pdu_reset(req->tc); |
| p9pdu_reset(req->rc); |
| |
| req->tc->tag = tag-1; |
| req->status = REQ_STATUS_ALLOC; |
| |
| return &c->reqs[row][col]; |
| } |
| |
| /** |
| * 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++; |
| |
| BUG_ON(tag >= c->max_tag); |
| |
| 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 |
| * @c: v9fs client struct |
| * |
| * 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); |
| c->tagpool = NULL; |
| goto error; |
| } |
| |
| p9_idpool_get(c->tagpool); /* reserve tag 0 */ |
| |
| c->max_tag = 0; |
| error: |
| return err; |
| } |
| |
| /** |
| * p9_tag_cleanup - cleans up tags structure and reclaims resources |
| * @c: v9fs client struct |
| * |
| * 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) { |
| P9_DPRINTK(P9_DEBUG_MUX, |
| "Attempting to cleanup non-free tag %d,%d\n", |
| row, col); |
| /* TODO: delay execution of cleanup */ |
| return; |
| } |
| } |
| } |
| |
| if (c->tagpool) { |
| p9_idpool_put(0, c->tagpool); /* free reserved tag 0 */ |
| p9_idpool_destroy(c->tagpool); |
| } |
| |
| /* free requests associated with tags */ |
| for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { |
| for (col = 0; col < P9_ROW_MAXTAG; col++) { |
| kfree(c->reqs[row][col].wq); |
| kfree(c->reqs[row][col].tc); |
| kfree(c->reqs[row][col].rc); |
| } |
| kfree(c->reqs[row]); |
| } |
| c->max_tag = 0; |
| } |
| |
| /** |
| * p9_free_req - free a request and clean-up as necessary |
| * c: client state |
| * r: request to release |
| * |
| */ |
| |
| static void p9_free_req(struct p9_client *c, struct p9_req_t *r) |
| { |
| int tag = r->tc->tag; |
| P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); |
| |
| r->status = REQ_STATUS_IDLE; |
| if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) |
| p9_idpool_put(tag, c->tagpool); |
| } |
| |
| /** |
| * p9_client_cb - call back from transport to client |
| * c: client state |
| * req: request received |
| * |
| */ |
| void p9_client_cb(struct p9_client *c, struct p9_req_t *req) |
| { |
| P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); |
| wake_up(req->wq); |
| P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); |
| } |
| EXPORT_SYMBOL(p9_client_cb); |
| |
| /** |
| * 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; |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, |
| pdu->id, pdu->tag); |
| |
| 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; |
| |
| err = p9_parse_header(req->rc, NULL, &type, NULL, 0); |
| if (err) { |
| P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); |
| return err; |
| } |
| |
| if (type == P9_RERROR || type == P9_RLERROR) { |
| int ecode; |
| |
| if (!p9_is_proto_dotl(c)) { |
| char *ename; |
| |
| err = p9pdu_readf(req->rc, c->proto_version, "s?d", |
| &ename, &ecode); |
| if (err) |
| goto out_err; |
| |
| if (p9_is_proto_dotu(c)) |
| err = -ecode; |
| |
| if (!err || !IS_ERR_VALUE(err)) { |
| err = p9_errstr2errno(ename, strlen(ename)); |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); |
| |
| kfree(ename); |
| } |
| } else { |
| err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); |
| err = -ecode; |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); |
| } |
| |
| } else |
| err = 0; |
| |
| return err; |
| |
| out_err: |
| P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); |
| |
| return err; |
| } |
| |
| /** |
| * p9_client_flush - flush (cancel) a request |
| * @c: client state |
| * @oldreq: request to cancel |
| * |
| * This sents a flush for a particular requests and links |
| * 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; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); |
| |
| req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| |
| /* if we haven't received a response for oldreq, |
| remove it from the list. */ |
| spin_lock(&c->lock); |
| if (oldreq->status == REQ_STATUS_FLSH) |
| list_del(&oldreq->req_list); |
| spin_unlock(&c->lock); |
| |
| p9_free_req(c, req); |
| return 0; |
| } |
| |
| /** |
| * 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 tag, err; |
| struct p9_req_t *req; |
| unsigned long flags; |
| int sigpending; |
| |
| P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); |
| |
| /* 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)) |
| return ERR_PTR(-EIO); |
| |
| if (signal_pending(current)) { |
| sigpending = 1; |
| clear_thread_flag(TIF_SIGPENDING); |
| } else |
| sigpending = 0; |
| |
| tag = P9_NOTAG; |
| if (type != P9_TVERSION) { |
| tag = p9_idpool_get(c->tagpool); |
| if (tag < 0) |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| req = p9_tag_alloc(c, tag); |
| if (IS_ERR(req)) |
| return req; |
| |
| /* marshall the data */ |
| p9pdu_prepare(req->tc, tag, type); |
| va_start(ap, fmt); |
| err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); |
| va_end(ap); |
| p9pdu_finalize(req->tc); |
| |
| err = c->trans_mod->request(c, req); |
| if (err < 0) { |
| if (err != -ERESTARTSYS) |
| c->status = Disconnected; |
| goto reterr; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); |
| err = wait_event_interruptible(*req->wq, |
| req->status >= REQ_STATUS_RCVD); |
| P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", |
| req->wq, tag, err); |
| |
| if (req->status == REQ_STATUS_ERROR) { |
| P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); |
| err = req->t_err; |
| } |
| |
| if ((err == -ERESTARTSYS) && (c->status == Connected)) { |
| P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); |
| sigpending = 1; |
| clear_thread_flag(TIF_SIGPENDING); |
| |
| 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; |
| |
| err = p9_check_errors(c, req); |
| if (!err) { |
| P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); |
| return req; |
| } |
| |
| reterr: |
| P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, |
| err); |
| p9_free_req(c, req); |
| return ERR_PTR(err); |
| } |
| |
| static struct p9_fid *p9_fid_create(struct p9_client *clnt) |
| { |
| int ret; |
| struct p9_fid *fid; |
| unsigned long flags; |
| |
| P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); |
| fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); |
| if (!fid) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = p9_idpool_get(clnt->fidpool); |
| if (ret < 0) { |
| ret = -ENOSPC; |
| goto error; |
| } |
| fid->fid = ret; |
| |
| memset(&fid->qid, 0, sizeof(struct p9_qid)); |
| fid->mode = -1; |
| fid->uid = current_fsuid(); |
| fid->clnt = clnt; |
| fid->rdir = NULL; |
| spin_lock_irqsave(&clnt->lock, flags); |
| list_add(&fid->flist, &clnt->fidlist); |
| spin_unlock_irqrestore(&clnt->lock, flags); |
| |
| return fid; |
| |
| error: |
| kfree(fid); |
| return ERR_PTR(ret); |
| } |
| |
| static void p9_fid_destroy(struct p9_fid *fid) |
| { |
| struct p9_client *clnt; |
| unsigned long flags; |
| |
| P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); |
| clnt = fid->clnt; |
| p9_idpool_put(fid->fid, clnt->fidpool); |
| spin_lock_irqsave(&clnt->lock, flags); |
| list_del(&fid->flist); |
| spin_unlock_irqrestore(&clnt->lock, flags); |
| kfree(fid->rdir); |
| kfree(fid); |
| } |
| |
| static int p9_client_version(struct p9_client *c) |
| { |
| int err = 0; |
| struct p9_req_t *req; |
| char *version; |
| int msize; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", |
| c->msize, c->proto_version); |
| |
| switch (c->proto_version) { |
| case p9_proto_2000L: |
| req = p9_client_rpc(c, P9_TVERSION, "ds", |
| c->msize, "9P2000.L"); |
| 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; |
| break; |
| } |
| |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); |
| if (err) { |
| P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); |
| if (!strncmp(version, "9P2000.L", 8)) |
| c->proto_version = p9_proto_2000L; |
| else if (!strncmp(version, "9P2000.u", 8)) |
| c->proto_version = p9_proto_2000u; |
| else if (!strncmp(version, "9P2000", 6)) |
| c->proto_version = p9_proto_legacy; |
| else { |
| err = -EREMOTEIO; |
| goto error; |
| } |
| |
| if (msize < c->msize) |
| c->msize = msize; |
| |
| error: |
| kfree(version); |
| p9_free_req(c, req); |
| |
| return err; |
| } |
| |
| struct p9_client *p9_client_create(const char *dev_name, char *options) |
| { |
| int err; |
| struct p9_client *clnt; |
| |
| err = 0; |
| clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); |
| if (!clnt) |
| return ERR_PTR(-ENOMEM); |
| |
| clnt->trans_mod = NULL; |
| clnt->trans = NULL; |
| spin_lock_init(&clnt->lock); |
| INIT_LIST_HEAD(&clnt->fidlist); |
| |
| p9_tag_init(clnt); |
| |
| err = parse_opts(options, clnt); |
| if (err < 0) |
| goto free_client; |
| |
| if (!clnt->trans_mod) |
| clnt->trans_mod = v9fs_get_default_trans(); |
| |
| if (clnt->trans_mod == NULL) { |
| err = -EPROTONOSUPPORT; |
| P9_DPRINTK(P9_DEBUG_ERROR, |
| "No transport defined or default transport\n"); |
| goto free_client; |
| } |
| |
| clnt->fidpool = p9_idpool_create(); |
| if (IS_ERR(clnt->fidpool)) { |
| err = PTR_ERR(clnt->fidpool); |
| clnt->fidpool = NULL; |
| goto put_trans; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", |
| clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); |
| |
| err = clnt->trans_mod->create(clnt, dev_name, options); |
| if (err) |
| goto destroy_fidpool; |
| |
| if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) |
| clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; |
| |
| err = p9_client_version(clnt); |
| if (err) |
| goto close_trans; |
| |
| return clnt; |
| |
| close_trans: |
| clnt->trans_mod->close(clnt); |
| destroy_fidpool: |
| p9_idpool_destroy(clnt->fidpool); |
| put_trans: |
| v9fs_put_trans(clnt->trans_mod); |
| free_client: |
| kfree(clnt); |
| return ERR_PTR(err); |
| } |
| EXPORT_SYMBOL(p9_client_create); |
| |
| void p9_client_destroy(struct p9_client *clnt) |
| { |
| struct p9_fid *fid, *fidptr; |
| |
| P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); |
| |
| if (clnt->trans_mod) |
| clnt->trans_mod->close(clnt); |
| |
| v9fs_put_trans(clnt->trans_mod); |
| |
| list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { |
| printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); |
| p9_fid_destroy(fid); |
| } |
| |
| if (clnt->fidpool) |
| p9_idpool_destroy(clnt->fidpool); |
| |
| p9_tag_cleanup(clnt); |
| |
| kfree(clnt); |
| } |
| EXPORT_SYMBOL(p9_client_destroy); |
| |
| void p9_client_disconnect(struct p9_client *clnt) |
| { |
| P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
| clnt->status = Disconnected; |
| } |
| EXPORT_SYMBOL(p9_client_disconnect); |
| |
| void p9_client_begin_disconnect(struct p9_client *clnt) |
| { |
| P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); |
| clnt->status = BeginDisconnect; |
| } |
| EXPORT_SYMBOL(p9_client_begin_disconnect); |
| |
| struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, |
| char *uname, u32 n_uname, char *aname) |
| { |
| int err; |
| struct p9_req_t *req; |
| struct p9_fid *fid; |
| struct p9_qid qid; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", |
| afid ? afid->fid : -1, uname, aname); |
| err = 0; |
| |
| fid = p9_fid_create(clnt); |
| if (IS_ERR(fid)) { |
| err = PTR_ERR(fid); |
| fid = NULL; |
| goto error; |
| } |
| |
| req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, |
| afid ? afid->fid : P9_NOFID, uname, aname, n_uname); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", |
| qid.type, |
| (unsigned long long)qid.path, |
| qid.version); |
| |
| memmove(&fid->qid, &qid, sizeof(struct p9_qid)); |
| |
| p9_free_req(clnt, req); |
| return fid; |
| |
| error: |
| if (fid) |
| p9_fid_destroy(fid); |
| return ERR_PTR(err); |
| } |
| EXPORT_SYMBOL(p9_client_attach); |
| |
| struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, |
| int clone) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_fid *fid; |
| struct p9_qid *wqids; |
| struct p9_req_t *req; |
| int16_t nwqids, count; |
| |
| err = 0; |
| wqids = NULL; |
| 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; |
| |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", |
| oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); |
| |
| req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, |
| nwname, wnames); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto clunk_fid; |
| } |
| p9_free_req(clnt, req); |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); |
| |
| if (nwqids != nwname) { |
| err = -ENOENT; |
| goto clunk_fid; |
| } |
| |
| for (count = 0; count < nwqids; count++) |
| P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", |
| count, wqids[count].type, |
| (unsigned long long)wqids[count].path, |
| wqids[count].version); |
| |
| if (nwname) |
| memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); |
| else |
| fid->qid = oldfid->qid; |
| |
| kfree(wqids); |
| return fid; |
| |
| clunk_fid: |
| kfree(wqids); |
| p9_client_clunk(fid); |
| fid = NULL; |
| |
| error: |
| 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; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| struct p9_qid qid; |
| int iounit; |
| |
| clnt = fid->clnt; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", |
| p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); |
| err = 0; |
| |
| if (fid->mode != -1) |
| return -EINVAL; |
| |
| 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); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", |
| p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, |
| (unsigned long long)qid.path, qid.version, iounit); |
| |
| fid->mode = mode; |
| fid->iounit = iounit; |
| |
| free_and_error: |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_open); |
| |
| int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, |
| gid_t gid, struct p9_qid *qid) |
| { |
| int err = 0; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| int iounit; |
| |
| P9_DPRINTK(P9_DEBUG_9P, |
| ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", |
| ofid->fid, name, flags, mode, gid); |
| clnt = ofid->clnt; |
| |
| if (ofid->mode != -1) |
| return -EINVAL; |
| |
| req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, |
| 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) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", |
| 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); |
| |
| int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, |
| char *extension) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| struct p9_qid qid; |
| int iounit; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", |
| fid->fid, name, perm, mode); |
| err = 0; |
| clnt = fid->clnt; |
| |
| if (fid->mode != -1) |
| return -EINVAL; |
| |
| 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; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", |
| qid.type, |
| (unsigned long long)qid.path, |
| qid.version, iounit); |
| |
| fid->mode = mode; |
| fid->iounit = iounit; |
| |
| free_and_error: |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_fcreate); |
| |
| int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, |
| struct p9_qid *qid) |
| { |
| int err = 0; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", |
| dfid->fid, name, symtgt); |
| clnt = dfid->clnt; |
| |
| req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, |
| gid); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", |
| 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); |
| |
| int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) |
| { |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", |
| 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); |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); |
| p9_free_req(clnt, req); |
| return 0; |
| } |
| EXPORT_SYMBOL(p9_client_link); |
| |
| int p9_client_fsync(struct p9_fid *fid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d\n", fid->fid); |
| err = 0; |
| clnt = fid->clnt; |
| |
| req = p9_client_rpc(clnt, P9_TFSYNC, "d", fid->fid); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); |
| |
| p9_free_req(clnt, req); |
| |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_fsync); |
| |
| int p9_client_clunk(struct p9_fid *fid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| if (!fid) { |
| P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); |
| dump_stack(); |
| return 0; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); |
| err = 0; |
| clnt = fid->clnt; |
| |
| req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); |
| |
| p9_free_req(clnt, req); |
| p9_fid_destroy(fid); |
| |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_clunk); |
| |
| int p9_client_remove(struct p9_fid *fid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); |
| err = 0; |
| clnt = fid->clnt; |
| |
| req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); |
| |
| p9_free_req(clnt, req); |
| error: |
| p9_fid_destroy(fid); |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_remove); |
| |
| int |
| p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, |
| u32 count) |
| { |
| int err, rsize, total; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| char *dataptr; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, |
| (long long unsigned) offset, count); |
| err = 0; |
| clnt = fid->clnt; |
| total = 0; |
| |
| rsize = fid->iounit; |
| if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| rsize = clnt->msize - P9_IOHDRSZ; |
| |
| if (count < rsize) |
| rsize = count; |
| |
| req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); |
| |
| if (data) { |
| memmove(data, dataptr, count); |
| } |
| |
| if (udata) { |
| err = copy_to_user(udata, dataptr, count); |
| if (err) { |
| err = -EFAULT; |
| goto free_and_error; |
| } |
| } |
| |
| p9_free_req(clnt, req); |
| return count; |
| |
| free_and_error: |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_read); |
| |
| int |
| p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, |
| u64 offset, u32 count) |
| { |
| int err, rsize, total; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", |
| fid->fid, (long long unsigned) offset, count); |
| err = 0; |
| clnt = fid->clnt; |
| total = 0; |
| |
| rsize = fid->iounit; |
| if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) |
| rsize = clnt->msize - P9_IOHDRSZ; |
| |
| if (count < rsize) |
| rsize = count; |
| if (data) |
| req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, |
| rsize, data); |
| else |
| req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, |
| rsize, udata); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); |
| |
| p9_free_req(clnt, req); |
| return count; |
| |
| free_and_error: |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_write); |
| |
| struct p9_wstat *p9_client_stat(struct p9_fid *fid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); |
| struct p9_req_t *req; |
| u16 ignored; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); |
| |
| if (!ret) |
| return ERR_PTR(-ENOMEM); |
| |
| err = 0; |
| clnt = fid->clnt; |
| |
| req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, |
| "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| "<<< uid=%d gid=%d n_muid=%d\n", |
| ret->size, ret->type, ret->dev, ret->qid.type, |
| (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, |
| ret->n_uid, ret->n_gid, ret->n_muid); |
| |
| p9_free_req(clnt, req); |
| return ret; |
| |
| error: |
| kfree(ret); |
| return ERR_PTR(err); |
| } |
| EXPORT_SYMBOL(p9_client_stat); |
| |
| 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; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", |
| 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) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, |
| "<<< RGETATTR st_result_mask=%lld\n" |
| "<<< qid=%x.%llx.%x\n" |
| "<<< st_mode=%8.8x st_nlink=%llu\n" |
| "<<< st_uid=%d st_gid=%d\n" |
| "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" |
| "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" |
| "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" |
| "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" |
| "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" |
| "<<< st_gen=%lld st_data_version=%lld", |
| ret->st_result_mask, ret->qid.type, ret->qid.path, |
| ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, |
| ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, |
| 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); |
| |
| static int p9_client_statsize(struct p9_wstat *wst, int proto_version) |
| { |
| int ret; |
| |
| /* NOTE: size shouldn't include its own length */ |
| /* size[2] type[2] dev[4] qid[13] */ |
| /* mode[4] atime[4] mtime[4] length[8]*/ |
| /* name[s] uid[s] gid[s] muid[s] */ |
| ret = 2+4+13+4+4+4+8+2+2+2+2; |
| |
| 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); |
| |
| if ((proto_version == p9_proto_2000u) || |
| (proto_version == p9_proto_2000L)) { |
| 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; |
| } |
| |
| int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) |
| { |
| int err; |
| struct p9_req_t *req; |
| struct p9_client *clnt; |
| |
| err = 0; |
| clnt = fid->clnt; |
| wst->size = p9_client_statsize(wst, clnt->proto_version); |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); |
| P9_DPRINTK(P9_DEBUG_9P, |
| " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" |
| " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" |
| " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" |
| " uid=%d gid=%d n_muid=%d\n", |
| wst->size, wst->type, wst->dev, wst->qid.type, |
| (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, |
| wst->n_uid, wst->n_gid, wst->n_muid); |
| |
| req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); |
| |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_wstat); |
| |
| 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; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); |
| P9_DPRINTK(P9_DEBUG_9P, |
| " valid=%x mode=%x uid=%d gid=%d size=%lld\n" |
| " atime_sec=%lld atime_nsec=%lld\n" |
| " mtime_sec=%lld mtime_nsec=%lld\n", |
| p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, |
| 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; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_setattr); |
| |
| 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; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); |
| |
| 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) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " |
| "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " |
| "fsid %llu namelen %ld\n", |
| 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); |
| |
| int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) |
| { |
| int err; |
| struct p9_req_t *req; |
| struct p9_client *clnt; |
| |
| err = 0; |
| clnt = fid->clnt; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", |
| 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; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); |
| |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_rename); |
| |
| /* |
| * 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; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, |
| ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", |
| 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) { |
| p9pdu_dump(1, req->rc); |
| p9_free_req(clnt, req); |
| goto clunk_fid; |
| } |
| p9_free_req(clnt, req); |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", |
| 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); |
| |
| 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; |
| |
| P9_DPRINTK(P9_DEBUG_9P, |
| ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", |
| 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; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); |
| p9_free_req(clnt, req); |
| error: |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(p9_client_xattrcreate); |
| |
| int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) |
| { |
| int err, rsize, total; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| char *dataptr; |
| |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", |
| fid->fid, (long long unsigned) offset, count); |
| |
| err = 0; |
| clnt = fid->clnt; |
| total = 0; |
| |
| rsize = fid->iounit; |
| if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) |
| rsize = clnt->msize - P9_READDIRHDRSZ; |
| |
| if (count < rsize) |
| rsize = count; |
| |
| req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); |
| if (IS_ERR(req)) { |
| err = PTR_ERR(req); |
| goto error; |
| } |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto free_and_error; |
| } |
| |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); |
| |
| if (data) |
| 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); |
| |
| int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, |
| dev_t rdev, gid_t gid, struct p9_qid *qid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| err = 0; |
| clnt = fid->clnt; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " |
| "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); |
| req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, |
| 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) { |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, |
| (unsigned long long)qid->path, qid->version); |
| |
| error: |
| p9_free_req(clnt, req); |
| return err; |
| |
| } |
| EXPORT_SYMBOL(p9_client_mknod_dotl); |
| |
| int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, |
| gid_t gid, struct p9_qid *qid) |
| { |
| int err; |
| struct p9_client *clnt; |
| struct p9_req_t *req; |
| |
| err = 0; |
| clnt = fid->clnt; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", |
| fid->fid, name, mode, gid); |
| req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, |
| gid); |
| if (IS_ERR(req)) |
| return PTR_ERR(req); |
| |
| err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); |
| if (err) { |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, |
| (unsigned long long)qid->path, qid->version); |
| |
| error: |
| p9_free_req(clnt, req); |
| return err; |
| |
| } |
| EXPORT_SYMBOL(p9_client_mkdir_dotl); |
| |
| 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; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " |
| "start %lld length %lld proc_id %d client_id %s\n", |
| 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) { |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); |
| error: |
| p9_free_req(clnt, req); |
| return err; |
| |
| } |
| EXPORT_SYMBOL(p9_client_lock_dotl); |
| |
| 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; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " |
| "length %lld proc_id %d client_id %s\n", 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) { |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " |
| "proc_id %d client_id %s\n", 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); |
| |
| 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; |
| P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); |
| |
| 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) { |
| p9pdu_dump(1, req->rc); |
| goto error; |
| } |
| P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); |
| error: |
| p9_free_req(clnt, req); |
| return err; |
| } |
| EXPORT_SYMBOL(p9_client_readlink); |