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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/cifs/smb1ops.c
Initial import
Diffstat (limited to 'fs/cifs/smb1ops.c')
-rw-r--r--fs/cifs/smb1ops.c1116
1 files changed, 1116 insertions, 0 deletions
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
new file mode 100644
index 000000000..fc537c290
--- /dev/null
+++ b/fs/cifs/smb1ops.c
@@ -0,0 +1,1116 @@
+/*
+ * SMB1 (CIFS) version specific operations
+ *
+ * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 as published
+ * by the Free Software Foundation.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/pagemap.h>
+#include <linux/vfs.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifspdu.h"
+#include "cifs_unicode.h"
+
+/*
+ * An NT cancel request header looks just like the original request except:
+ *
+ * The Command is SMB_COM_NT_CANCEL
+ * The WordCount is zeroed out
+ * The ByteCount is zeroed out
+ *
+ * This function mangles an existing request buffer into a
+ * SMB_COM_NT_CANCEL request and then sends it.
+ */
+static int
+send_nt_cancel(struct TCP_Server_Info *server, void *buf,
+ struct mid_q_entry *mid)
+{
+ int rc = 0;
+ struct smb_hdr *in_buf = (struct smb_hdr *)buf;
+
+ /* -4 for RFC1001 length and +2 for BCC field */
+ in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
+ in_buf->Command = SMB_COM_NT_CANCEL;
+ in_buf->WordCount = 0;
+ put_bcc(0, in_buf);
+
+ mutex_lock(&server->srv_mutex);
+ rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+ if (rc) {
+ mutex_unlock(&server->srv_mutex);
+ return rc;
+ }
+
+ /*
+ * The response to this call was already factored into the sequence
+ * number when the call went out, so we must adjust it back downward
+ * after signing here.
+ */
+ --server->sequence_number;
+ rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
+ if (rc < 0)
+ server->sequence_number--;
+
+ mutex_unlock(&server->srv_mutex);
+
+ cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
+ get_mid(in_buf), rc);
+
+ return rc;
+}
+
+static bool
+cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
+{
+ return ob1->fid.netfid == ob2->fid.netfid;
+}
+
+static unsigned int
+cifs_read_data_offset(char *buf)
+{
+ READ_RSP *rsp = (READ_RSP *)buf;
+ return le16_to_cpu(rsp->DataOffset);
+}
+
+static unsigned int
+cifs_read_data_length(char *buf)
+{
+ READ_RSP *rsp = (READ_RSP *)buf;
+ return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
+ le16_to_cpu(rsp->DataLength);
+}
+
+static struct mid_q_entry *
+cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
+{
+ struct smb_hdr *buf = (struct smb_hdr *)buffer;
+ struct mid_q_entry *mid;
+
+ spin_lock(&GlobalMid_Lock);
+ list_for_each_entry(mid, &server->pending_mid_q, qhead) {
+ if (compare_mid(mid->mid, buf) &&
+ mid->mid_state == MID_REQUEST_SUBMITTED &&
+ le16_to_cpu(mid->command) == buf->Command) {
+ spin_unlock(&GlobalMid_Lock);
+ return mid;
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
+ return NULL;
+}
+
+static void
+cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add,
+ const int optype)
+{
+ spin_lock(&server->req_lock);
+ server->credits += add;
+ server->in_flight--;
+ spin_unlock(&server->req_lock);
+ wake_up(&server->request_q);
+}
+
+static void
+cifs_set_credits(struct TCP_Server_Info *server, const int val)
+{
+ spin_lock(&server->req_lock);
+ server->credits = val;
+ server->oplocks = val > 1 ? enable_oplocks : false;
+ spin_unlock(&server->req_lock);
+}
+
+static int *
+cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
+{
+ return &server->credits;
+}
+
+static unsigned int
+cifs_get_credits(struct mid_q_entry *mid)
+{
+ return 1;
+}
+
+/*
+ * Find a free multiplex id (SMB mid). Otherwise there could be
+ * mid collisions which might cause problems, demultiplexing the
+ * wrong response to this request. Multiplex ids could collide if
+ * one of a series requests takes much longer than the others, or
+ * if a very large number of long lived requests (byte range
+ * locks or FindNotify requests) are pending. No more than
+ * 64K-1 requests can be outstanding at one time. If no
+ * mids are available, return zero. A future optimization
+ * could make the combination of mids and uid the key we use
+ * to demultiplex on (rather than mid alone).
+ * In addition to the above check, the cifs demultiplex
+ * code already used the command code as a secondary
+ * check of the frame and if signing is negotiated the
+ * response would be discarded if the mid were the same
+ * but the signature was wrong. Since the mid is not put in the
+ * pending queue until later (when it is about to be dispatched)
+ * we do have to limit the number of outstanding requests
+ * to somewhat less than 64K-1 although it is hard to imagine
+ * so many threads being in the vfs at one time.
+ */
+static __u64
+cifs_get_next_mid(struct TCP_Server_Info *server)
+{
+ __u64 mid = 0;
+ __u16 last_mid, cur_mid;
+ bool collision;
+
+ spin_lock(&GlobalMid_Lock);
+
+ /* mid is 16 bit only for CIFS/SMB */
+ cur_mid = (__u16)((server->CurrentMid) & 0xffff);
+ /* we do not want to loop forever */
+ last_mid = cur_mid;
+ cur_mid++;
+
+ /*
+ * This nested loop looks more expensive than it is.
+ * In practice the list of pending requests is short,
+ * fewer than 50, and the mids are likely to be unique
+ * on the first pass through the loop unless some request
+ * takes longer than the 64 thousand requests before it
+ * (and it would also have to have been a request that
+ * did not time out).
+ */
+ while (cur_mid != last_mid) {
+ struct mid_q_entry *mid_entry;
+ unsigned int num_mids;
+
+ collision = false;
+ if (cur_mid == 0)
+ cur_mid++;
+
+ num_mids = 0;
+ list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
+ ++num_mids;
+ if (mid_entry->mid == cur_mid &&
+ mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
+ /* This mid is in use, try a different one */
+ collision = true;
+ break;
+ }
+ }
+
+ /*
+ * if we have more than 32k mids in the list, then something
+ * is very wrong. Possibly a local user is trying to DoS the
+ * box by issuing long-running calls and SIGKILL'ing them. If
+ * we get to 2^16 mids then we're in big trouble as this
+ * function could loop forever.
+ *
+ * Go ahead and assign out the mid in this situation, but force
+ * an eventual reconnect to clean out the pending_mid_q.
+ */
+ if (num_mids > 32768)
+ server->tcpStatus = CifsNeedReconnect;
+
+ if (!collision) {
+ mid = (__u64)cur_mid;
+ server->CurrentMid = mid;
+ break;
+ }
+ cur_mid++;
+ }
+ spin_unlock(&GlobalMid_Lock);
+ return mid;
+}
+
+/*
+ return codes:
+ 0 not a transact2, or all data present
+ >0 transact2 with that much data missing
+ -EINVAL invalid transact2
+ */
+static int
+check2ndT2(char *buf)
+{
+ struct smb_hdr *pSMB = (struct smb_hdr *)buf;
+ struct smb_t2_rsp *pSMBt;
+ int remaining;
+ __u16 total_data_size, data_in_this_rsp;
+
+ if (pSMB->Command != SMB_COM_TRANSACTION2)
+ return 0;
+
+ /* check for plausible wct, bcc and t2 data and parm sizes */
+ /* check for parm and data offset going beyond end of smb */
+ if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
+ cifs_dbg(FYI, "invalid transact2 word count\n");
+ return -EINVAL;
+ }
+
+ pSMBt = (struct smb_t2_rsp *)pSMB;
+
+ total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
+ data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
+
+ if (total_data_size == data_in_this_rsp)
+ return 0;
+ else if (total_data_size < data_in_this_rsp) {
+ cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
+ total_data_size, data_in_this_rsp);
+ return -EINVAL;
+ }
+
+ remaining = total_data_size - data_in_this_rsp;
+
+ cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
+ remaining);
+ if (total_data_size > CIFSMaxBufSize) {
+ cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
+ total_data_size, CIFSMaxBufSize);
+ return -EINVAL;
+ }
+ return remaining;
+}
+
+static int
+coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
+{
+ struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
+ struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
+ char *data_area_of_tgt;
+ char *data_area_of_src;
+ int remaining;
+ unsigned int byte_count, total_in_tgt;
+ __u16 tgt_total_cnt, src_total_cnt, total_in_src;
+
+ src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
+ tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
+
+ if (tgt_total_cnt != src_total_cnt)
+ cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
+ src_total_cnt, tgt_total_cnt);
+
+ total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
+
+ remaining = tgt_total_cnt - total_in_tgt;
+
+ if (remaining < 0) {
+ cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n",
+ tgt_total_cnt, total_in_tgt);
+ return -EPROTO;
+ }
+
+ if (remaining == 0) {
+ /* nothing to do, ignore */
+ cifs_dbg(FYI, "no more data remains\n");
+ return 0;
+ }
+
+ total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
+ if (remaining < total_in_src)
+ cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
+
+ /* find end of first SMB data area */
+ data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
+ get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
+
+ /* validate target area */
+ data_area_of_src = (char *)&pSMBs->hdr.Protocol +
+ get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
+
+ data_area_of_tgt += total_in_tgt;
+
+ total_in_tgt += total_in_src;
+ /* is the result too big for the field? */
+ if (total_in_tgt > USHRT_MAX) {
+ cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
+ total_in_tgt);
+ return -EPROTO;
+ }
+ put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
+
+ /* fix up the BCC */
+ byte_count = get_bcc(target_hdr);
+ byte_count += total_in_src;
+ /* is the result too big for the field? */
+ if (byte_count > USHRT_MAX) {
+ cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
+ return -EPROTO;
+ }
+ put_bcc(byte_count, target_hdr);
+
+ byte_count = be32_to_cpu(target_hdr->smb_buf_length);
+ byte_count += total_in_src;
+ /* don't allow buffer to overflow */
+ if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+ cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
+ byte_count);
+ return -ENOBUFS;
+ }
+ target_hdr->smb_buf_length = cpu_to_be32(byte_count);
+
+ /* copy second buffer into end of first buffer */
+ memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
+
+ if (remaining != total_in_src) {
+ /* more responses to go */
+ cifs_dbg(FYI, "waiting for more secondary responses\n");
+ return 1;
+ }
+
+ /* we are done */
+ cifs_dbg(FYI, "found the last secondary response\n");
+ return 0;
+}
+
+static void
+cifs_downgrade_oplock(struct TCP_Server_Info *server,
+ struct cifsInodeInfo *cinode, bool set_level2)
+{
+ if (set_level2)
+ cifs_set_oplock_level(cinode, OPLOCK_READ);
+ else
+ cifs_set_oplock_level(cinode, 0);
+}
+
+static bool
+cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
+ char *buf, int malformed)
+{
+ if (malformed)
+ return false;
+ if (check2ndT2(buf) <= 0)
+ return false;
+ mid->multiRsp = true;
+ if (mid->resp_buf) {
+ /* merge response - fix up 1st*/
+ malformed = coalesce_t2(buf, mid->resp_buf);
+ if (malformed > 0)
+ return true;
+ /* All parts received or packet is malformed. */
+ mid->multiEnd = true;
+ dequeue_mid(mid, malformed);
+ return true;
+ }
+ if (!server->large_buf) {
+ /*FIXME: switch to already allocated largebuf?*/
+ cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
+ } else {
+ /* Have first buffer */
+ mid->resp_buf = buf;
+ mid->large_buf = true;
+ server->bigbuf = NULL;
+ }
+ return true;
+}
+
+static bool
+cifs_need_neg(struct TCP_Server_Info *server)
+{
+ return server->maxBuf == 0;
+}
+
+static int
+cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
+{
+ int rc;
+ rc = CIFSSMBNegotiate(xid, ses);
+ if (rc == -EAGAIN) {
+ /* retry only once on 1st time connection */
+ set_credits(ses->server, 1);
+ rc = CIFSSMBNegotiate(xid, ses);
+ if (rc == -EAGAIN)
+ rc = -EHOSTDOWN;
+ }
+ return rc;
+}
+
+static unsigned int
+cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
+{
+ __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+ struct TCP_Server_Info *server = tcon->ses->server;
+ unsigned int wsize;
+
+ /* start with specified wsize, or default */
+ if (volume_info->wsize)
+ wsize = volume_info->wsize;
+ else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
+ wsize = CIFS_DEFAULT_IOSIZE;
+ else
+ wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
+
+ /* can server support 24-bit write sizes? (via UNIX extensions) */
+ if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
+ wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
+
+ /*
+ * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
+ * Limit it to max buffer offered by the server, minus the size of the
+ * WRITEX header, not including the 4 byte RFC1001 length.
+ */
+ if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
+ (!(server->capabilities & CAP_UNIX) && server->sign))
+ wsize = min_t(unsigned int, wsize,
+ server->maxBuf - sizeof(WRITE_REQ) + 4);
+
+ /* hard limit of CIFS_MAX_WSIZE */
+ wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
+
+ return wsize;
+}
+
+static unsigned int
+cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
+{
+ __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
+ struct TCP_Server_Info *server = tcon->ses->server;
+ unsigned int rsize, defsize;
+
+ /*
+ * Set default value...
+ *
+ * HACK alert! Ancient servers have very small buffers. Even though
+ * MS-CIFS indicates that servers are only limited by the client's
+ * bufsize for reads, testing against win98se shows that it throws
+ * INVALID_PARAMETER errors if you try to request too large a read.
+ * OS/2 just sends back short reads.
+ *
+ * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
+ * it can't handle a read request larger than its MaxBufferSize either.
+ */
+ if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
+ defsize = CIFS_DEFAULT_IOSIZE;
+ else if (server->capabilities & CAP_LARGE_READ_X)
+ defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
+ else
+ defsize = server->maxBuf - sizeof(READ_RSP);
+
+ rsize = volume_info->rsize ? volume_info->rsize : defsize;
+
+ /*
+ * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
+ * the client's MaxBufferSize.
+ */
+ if (!(server->capabilities & CAP_LARGE_READ_X))
+ rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
+
+ /* hard limit of CIFS_MAX_RSIZE */
+ rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
+
+ return rsize;
+}
+
+static void
+cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
+{
+ CIFSSMBQFSDeviceInfo(xid, tcon);
+ CIFSSMBQFSAttributeInfo(xid, tcon);
+}
+
+static int
+cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb, const char *full_path)
+{
+ int rc;
+ FILE_ALL_INFO *file_info;
+
+ file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+ if (file_info == NULL)
+ return -ENOMEM;
+
+ rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
+ 0 /* not legacy */, cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+
+ if (rc == -EOPNOTSUPP || rc == -EINVAL)
+ rc = SMBQueryInformation(xid, tcon, full_path, file_info,
+ cifs_sb->local_nls, cifs_remap(cifs_sb));
+ kfree(file_info);
+ return rc;
+}
+
+static int
+cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb, const char *full_path,
+ FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink)
+{
+ int rc;
+
+ *symlink = false;
+
+ /* could do find first instead but this returns more info */
+ rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
+ cifs_sb->local_nls, cifs_remap(cifs_sb));
+ /*
+ * BB optimize code so we do not make the above call when server claims
+ * no NT SMB support and the above call failed at least once - set flag
+ * in tcon or mount.
+ */
+ if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
+ rc = SMBQueryInformation(xid, tcon, full_path, data,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ *adjustTZ = true;
+ }
+
+ if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) {
+ int tmprc;
+ int oplock = 0;
+ struct cifs_fid fid;
+ struct cifs_open_parms oparms;
+
+ oparms.tcon = tcon;
+ oparms.cifs_sb = cifs_sb;
+ oparms.desired_access = FILE_READ_ATTRIBUTES;
+ oparms.create_options = 0;
+ oparms.disposition = FILE_OPEN;
+ oparms.path = full_path;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ /* Need to check if this is a symbolic link or not */
+ tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
+ if (tmprc == -EOPNOTSUPP)
+ *symlink = true;
+ else if (tmprc == 0)
+ CIFSSMBClose(xid, tcon, fid.netfid);
+ }
+
+ return rc;
+}
+
+static int
+cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_sb_info *cifs_sb, const char *full_path,
+ u64 *uniqueid, FILE_ALL_INFO *data)
+{
+ /*
+ * We can not use the IndexNumber field by default from Windows or
+ * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
+ * CIFS spec claims that this value is unique within the scope of a
+ * share, and the windows docs hint that it's actually unique
+ * per-machine.
+ *
+ * There may be higher info levels that work but are there Windows
+ * server or network appliances for which IndexNumber field is not
+ * guaranteed unique?
+ */
+ return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+}
+
+static int
+cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_fid *fid, FILE_ALL_INFO *data)
+{
+ return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
+}
+
+static void
+cifs_clear_stats(struct cifs_tcon *tcon)
+{
+#ifdef CONFIG_CIFS_STATS
+ atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
+ atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
+#endif
+}
+
+static void
+cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
+{
+#ifdef CONFIG_CIFS_STATS
+ seq_printf(m, " Oplocks breaks: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
+ seq_printf(m, "\nReads: %d Bytes: %llu",
+ atomic_read(&tcon->stats.cifs_stats.num_reads),
+ (long long)(tcon->bytes_read));
+ seq_printf(m, "\nWrites: %d Bytes: %llu",
+ atomic_read(&tcon->stats.cifs_stats.num_writes),
+ (long long)(tcon->bytes_written));
+ seq_printf(m, "\nFlushes: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_flushes));
+ seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_locks),
+ atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
+ atomic_read(&tcon->stats.cifs_stats.num_symlinks));
+ seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_opens),
+ atomic_read(&tcon->stats.cifs_stats.num_closes),
+ atomic_read(&tcon->stats.cifs_stats.num_deletes));
+ seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_posixopens),
+ atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
+ seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
+ atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
+ atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
+ seq_printf(m, "\nRenames: %d T2 Renames %d",
+ atomic_read(&tcon->stats.cifs_stats.num_renames),
+ atomic_read(&tcon->stats.cifs_stats.num_t2renames));
+ seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
+ atomic_read(&tcon->stats.cifs_stats.num_ffirst),
+ atomic_read(&tcon->stats.cifs_stats.num_fnext),
+ atomic_read(&tcon->stats.cifs_stats.num_fclose));
+#endif
+}
+
+static void
+cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
+ struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
+ const unsigned int xid)
+{
+ FILE_BASIC_INFO info;
+ struct cifsInodeInfo *cifsInode;
+ u32 dosattrs;
+ int rc;
+
+ memset(&info, 0, sizeof(info));
+ cifsInode = CIFS_I(inode);
+ dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
+ info.Attributes = cpu_to_le32(dosattrs);
+ rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ if (rc == 0)
+ cifsInode->cifsAttrs = dosattrs;
+}
+
+static int
+cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
+ __u32 *oplock, FILE_ALL_INFO *buf)
+{
+ if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
+ return SMBLegacyOpen(xid, oparms->tcon, oparms->path,
+ oparms->disposition,
+ oparms->desired_access,
+ oparms->create_options,
+ &oparms->fid->netfid, oplock, buf,
+ oparms->cifs_sb->local_nls,
+ cifs_remap(oparms->cifs_sb));
+ return CIFS_open(xid, oparms, oplock, buf);
+}
+
+static void
+cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
+{
+ struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
+ cfile->fid.netfid = fid->netfid;
+ cifs_set_oplock_level(cinode, oplock);
+ cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
+}
+
+static void
+cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_fid *fid)
+{
+ CIFSSMBClose(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_fid *fid)
+{
+ return CIFSSMBFlush(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
+ struct cifs_io_parms *parms, unsigned int *bytes_read,
+ char **buf, int *buf_type)
+{
+ parms->netfid = pfid->netfid;
+ return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
+}
+
+static int
+cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
+ struct cifs_io_parms *parms, unsigned int *written,
+ struct kvec *iov, unsigned long nr_segs)
+{
+
+ parms->netfid = pfid->netfid;
+ return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
+}
+
+static int
+smb_set_file_info(struct inode *inode, const char *full_path,
+ FILE_BASIC_INFO *buf, const unsigned int xid)
+{
+ int oplock = 0;
+ int rc;
+ __u32 netpid;
+ struct cifs_fid fid;
+ struct cifs_open_parms oparms;
+ struct cifsFileInfo *open_file;
+ struct cifsInodeInfo *cinode = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct tcon_link *tlink = NULL;
+ struct cifs_tcon *tcon;
+
+ /* if the file is already open for write, just use that fileid */
+ open_file = find_writable_file(cinode, true);
+ if (open_file) {
+ fid.netfid = open_file->fid.netfid;
+ netpid = open_file->pid;
+ tcon = tlink_tcon(open_file->tlink);
+ goto set_via_filehandle;
+ }
+
+ tlink = cifs_sb_tlink(cifs_sb);
+ if (IS_ERR(tlink)) {
+ rc = PTR_ERR(tlink);
+ tlink = NULL;
+ goto out;
+ }
+ tcon = tlink_tcon(tlink);
+
+ rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ if (rc == 0) {
+ cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
+ goto out;
+ } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
+ goto out;
+ }
+
+ oparms.tcon = tcon;
+ oparms.cifs_sb = cifs_sb;
+ oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES;
+ oparms.create_options = CREATE_NOT_DIR;
+ oparms.disposition = FILE_OPEN;
+ oparms.path = full_path;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
+ rc = CIFS_open(xid, &oparms, &oplock, NULL);
+ if (rc != 0) {
+ if (rc == -EIO)
+ rc = -EINVAL;
+ goto out;
+ }
+
+ netpid = current->tgid;
+
+set_via_filehandle:
+ rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
+ if (!rc)
+ cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
+
+ if (open_file == NULL)
+ CIFSSMBClose(xid, tcon, fid.netfid);
+ else
+ cifsFileInfo_put(open_file);
+out:
+ if (tlink != NULL)
+ cifs_put_tlink(tlink);
+ return rc;
+}
+
+static int
+cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifsFileInfo *cfile)
+{
+ return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
+}
+
+static int
+cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *path, struct cifs_sb_info *cifs_sb,
+ struct cifs_fid *fid, __u16 search_flags,
+ struct cifs_search_info *srch_inf)
+{
+ return CIFSFindFirst(xid, tcon, path, cifs_sb,
+ &fid->netfid, search_flags, srch_inf, true);
+}
+
+static int
+cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_fid *fid, __u16 search_flags,
+ struct cifs_search_info *srch_inf)
+{
+ return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
+}
+
+static int
+cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
+ struct cifs_fid *fid)
+{
+ return CIFSFindClose(xid, tcon, fid->netfid);
+}
+
+static int
+cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
+ struct cifsInodeInfo *cinode)
+{
+ return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
+ LOCKING_ANDX_OPLOCK_RELEASE, false,
+ CIFS_CACHE_READ(cinode) ? 1 : 0);
+}
+
+static int
+cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *buf)
+{
+ int rc = -EOPNOTSUPP;
+
+ buf->f_type = CIFS_MAGIC_NUMBER;
+
+ /*
+ * We could add a second check for a QFS Unix capability bit
+ */
+ if ((tcon->ses->capabilities & CAP_UNIX) &&
+ (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
+ rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
+
+ /*
+ * Only need to call the old QFSInfo if failed on newer one,
+ * e.g. by OS/2.
+ **/
+ if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
+ rc = CIFSSMBQFSInfo(xid, tcon, buf);
+
+ /*
+ * Some old Windows servers also do not support level 103, retry with
+ * older level one if old server failed the previous call or we
+ * bypassed it because we detected that this was an older LANMAN sess
+ */
+ if (rc)
+ rc = SMBOldQFSInfo(xid, tcon, buf);
+ return rc;
+}
+
+static int
+cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
+ __u64 length, __u32 type, int lock, int unlock, bool wait)
+{
+ return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
+ current->tgid, length, offset, unlock, lock,
+ (__u8)type, wait, 0);
+}
+
+static int
+cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
+ const unsigned char *searchName, char **symlinkinfo,
+ const struct nls_table *nls_codepage)
+{
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ int rc;
+ unsigned int num_referrals = 0;
+ struct dfs_info3_param *referrals = NULL;
+
+ rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage,
+ &num_referrals, &referrals, 0);
+
+ if (!rc && num_referrals > 0) {
+ *symlinkinfo = kstrndup(referrals->node_name,
+ strlen(referrals->node_name),
+ GFP_KERNEL);
+ if (!*symlinkinfo)
+ rc = -ENOMEM;
+ free_dfs_info_array(referrals, num_referrals);
+ }
+ return rc;
+#else /* No DFS support */
+ return -EREMOTE;
+#endif
+}
+
+static int
+cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *full_path, char **target_path,
+ struct cifs_sb_info *cifs_sb)
+{
+ int rc;
+ int oplock = 0;
+ struct cifs_fid fid;
+ struct cifs_open_parms oparms;
+
+ cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
+
+ /* Check for unix extensions */
+ if (cap_unix(tcon->ses)) {
+ rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
+ cifs_sb->local_nls,
+ cifs_remap(cifs_sb));
+ if (rc == -EREMOTE)
+ rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
+ target_path,
+ cifs_sb->local_nls);
+
+ goto out;
+ }
+
+ oparms.tcon = tcon;
+ oparms.cifs_sb = cifs_sb;
+ oparms.desired_access = FILE_READ_ATTRIBUTES;
+ oparms.create_options = OPEN_REPARSE_POINT;
+ oparms.disposition = FILE_OPEN;
+ oparms.path = full_path;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ rc = CIFS_open(xid, &oparms, &oplock, NULL);
+ if (rc)
+ goto out;
+
+ rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
+ cifs_sb->local_nls);
+ if (rc)
+ goto out_close;
+
+ convert_delimiter(*target_path, '/');
+out_close:
+ CIFSSMBClose(xid, tcon, fid.netfid);
+out:
+ if (!rc)
+ cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
+ return rc;
+}
+
+static bool
+cifs_is_read_op(__u32 oplock)
+{
+ return oplock == OPLOCK_READ;
+}
+
+static unsigned int
+cifs_wp_retry_size(struct inode *inode)
+{
+ return CIFS_SB(inode->i_sb)->wsize;
+}
+
+static bool
+cifs_dir_needs_close(struct cifsFileInfo *cfile)
+{
+ return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
+}
+
+struct smb_version_operations smb1_operations = {
+ .send_cancel = send_nt_cancel,
+ .compare_fids = cifs_compare_fids,
+ .setup_request = cifs_setup_request,
+ .setup_async_request = cifs_setup_async_request,
+ .check_receive = cifs_check_receive,
+ .add_credits = cifs_add_credits,
+ .set_credits = cifs_set_credits,
+ .get_credits_field = cifs_get_credits_field,
+ .get_credits = cifs_get_credits,
+ .wait_mtu_credits = cifs_wait_mtu_credits,
+ .get_next_mid = cifs_get_next_mid,
+ .read_data_offset = cifs_read_data_offset,
+ .read_data_length = cifs_read_data_length,
+ .map_error = map_smb_to_linux_error,
+ .find_mid = cifs_find_mid,
+ .check_message = checkSMB,
+ .dump_detail = cifs_dump_detail,
+ .clear_stats = cifs_clear_stats,
+ .print_stats = cifs_print_stats,
+ .is_oplock_break = is_valid_oplock_break,
+ .downgrade_oplock = cifs_downgrade_oplock,
+ .check_trans2 = cifs_check_trans2,
+ .need_neg = cifs_need_neg,
+ .negotiate = cifs_negotiate,
+ .negotiate_wsize = cifs_negotiate_wsize,
+ .negotiate_rsize = cifs_negotiate_rsize,
+ .sess_setup = CIFS_SessSetup,
+ .logoff = CIFSSMBLogoff,
+ .tree_connect = CIFSTCon,
+ .tree_disconnect = CIFSSMBTDis,
+ .get_dfs_refer = CIFSGetDFSRefer,
+ .qfs_tcon = cifs_qfs_tcon,
+ .is_path_accessible = cifs_is_path_accessible,
+ .query_path_info = cifs_query_path_info,
+ .query_file_info = cifs_query_file_info,
+ .get_srv_inum = cifs_get_srv_inum,
+ .set_path_size = CIFSSMBSetEOF,
+ .set_file_size = CIFSSMBSetFileSize,
+ .set_file_info = smb_set_file_info,
+ .set_compression = cifs_set_compression,
+ .echo = CIFSSMBEcho,
+ .mkdir = CIFSSMBMkDir,
+ .mkdir_setinfo = cifs_mkdir_setinfo,
+ .rmdir = CIFSSMBRmDir,
+ .unlink = CIFSSMBDelFile,
+ .rename_pending_delete = cifs_rename_pending_delete,
+ .rename = CIFSSMBRename,
+ .create_hardlink = CIFSCreateHardLink,
+ .query_symlink = cifs_query_symlink,
+ .open = cifs_open_file,
+ .set_fid = cifs_set_fid,
+ .close = cifs_close_file,
+ .flush = cifs_flush_file,
+ .async_readv = cifs_async_readv,
+ .async_writev = cifs_async_writev,
+ .sync_read = cifs_sync_read,
+ .sync_write = cifs_sync_write,
+ .query_dir_first = cifs_query_dir_first,
+ .query_dir_next = cifs_query_dir_next,
+ .close_dir = cifs_close_dir,
+ .calc_smb_size = smbCalcSize,
+ .oplock_response = cifs_oplock_response,
+ .queryfs = cifs_queryfs,
+ .mand_lock = cifs_mand_lock,
+ .mand_unlock_range = cifs_unlock_range,
+ .push_mand_locks = cifs_push_mandatory_locks,
+ .query_mf_symlink = cifs_query_mf_symlink,
+ .create_mf_symlink = cifs_create_mf_symlink,
+ .is_read_op = cifs_is_read_op,
+ .wp_retry_size = cifs_wp_retry_size,
+ .dir_needs_close = cifs_dir_needs_close,
+#ifdef CONFIG_CIFS_XATTR
+ .query_all_EAs = CIFSSMBQAllEAs,
+ .set_EA = CIFSSMBSetEA,
+#endif /* CIFS_XATTR */
+#ifdef CONFIG_CIFS_ACL
+ .get_acl = get_cifs_acl,
+ .get_acl_by_fid = get_cifs_acl_by_fid,
+ .set_acl = set_cifs_acl,
+#endif /* CIFS_ACL */
+};
+
+struct smb_version_values smb1_values = {
+ .version_string = SMB1_VERSION_STRING,
+ .large_lock_type = LOCKING_ANDX_LARGE_FILES,
+ .exclusive_lock_type = 0,
+ .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
+ .unlock_lock_type = 0,
+ .header_size = sizeof(struct smb_hdr),
+ .max_header_size = MAX_CIFS_HDR_SIZE,
+ .read_rsp_size = sizeof(READ_RSP),
+ .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
+ .cap_unix = CAP_UNIX,
+ .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
+ .cap_large_files = CAP_LARGE_FILES,
+ .signing_enabled = SECMODE_SIGN_ENABLED,
+ .signing_required = SECMODE_SIGN_REQUIRED,
+};