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fs/cifs/misc.c
21.8 KB
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/* * fs/cifs/misc.c * |
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* Copyright (C) International Business Machines Corp., 2002,2008 |
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* Author(s): Steve French (sfrench@us.ibm.com) * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * 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 |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ #include <linux/slab.h> #include <linux/ctype.h> #include <linux/mempool.h> #include "cifspdu.h" #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" #include "smberr.h" #include "nterr.h" |
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#include "cifs_unicode.h" |
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extern mempool_t *cifs_sm_req_poolp; extern mempool_t *cifs_req_poolp; |
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/* The xid serves as a useful identifier for each incoming vfs request, in a similar way to the mid which is useful to track each sent smb, and CurrentXid can also provide a running counter (although it will eventually wrap past zero) of the total vfs operations handled |
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since the cifs fs was mounted */ unsigned int _GetXid(void) { unsigned int xid; spin_lock(&GlobalMid_Lock); GlobalTotalActiveXid++; |
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/* keep high water mark for number of simultaneous ops in filesystem */ |
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if (GlobalTotalActiveXid > GlobalMaxActiveXid) |
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GlobalMaxActiveXid = GlobalTotalActiveXid; |
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if (GlobalTotalActiveXid > 65000) |
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cFYI(1, "warning: more than 65000 requests active"); |
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xid = GlobalCurrentXid++; spin_unlock(&GlobalMid_Lock); return xid; } void _FreeXid(unsigned int xid) { spin_lock(&GlobalMid_Lock); |
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/* if (GlobalTotalActiveXid == 0) |
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BUG(); */ GlobalTotalActiveXid--; spin_unlock(&GlobalMid_Lock); } struct cifsSesInfo * sesInfoAlloc(void) { struct cifsSesInfo *ret_buf; |
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ret_buf = kzalloc(sizeof(struct cifsSesInfo), GFP_KERNEL); |
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if (ret_buf) { |
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atomic_inc(&sesInfoAllocCount); ret_buf->status = CifsNew; |
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++ret_buf->ses_count; INIT_LIST_HEAD(&ret_buf->smb_ses_list); |
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INIT_LIST_HEAD(&ret_buf->tcon_list); |
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mutex_init(&ret_buf->session_mutex); |
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} return ret_buf; } void sesInfoFree(struct cifsSesInfo *buf_to_free) { if (buf_to_free == NULL) { |
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cFYI(1, "Null buffer passed to sesInfoFree"); |
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return; } |
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atomic_dec(&sesInfoAllocCount); |
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kfree(buf_to_free->serverOS); kfree(buf_to_free->serverDomain); kfree(buf_to_free->serverNOS); |
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if (buf_to_free->password) { memset(buf_to_free->password, 0, strlen(buf_to_free->password)); kfree(buf_to_free->password); } |
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kfree(buf_to_free->domainName); |
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kfree(buf_to_free); } struct cifsTconInfo * tconInfoAlloc(void) { struct cifsTconInfo *ret_buf; |
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ret_buf = kzalloc(sizeof(struct cifsTconInfo), GFP_KERNEL); |
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if (ret_buf) { |
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atomic_inc(&tconInfoAllocCount); |
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ret_buf->tidStatus = CifsNew; |
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++ret_buf->tc_count; |
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INIT_LIST_HEAD(&ret_buf->openFileList); |
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INIT_LIST_HEAD(&ret_buf->tcon_list); |
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#ifdef CONFIG_CIFS_STATS spin_lock_init(&ret_buf->stat_lock); #endif |
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} return ret_buf; } void tconInfoFree(struct cifsTconInfo *buf_to_free) { if (buf_to_free == NULL) { |
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cFYI(1, "Null buffer passed to tconInfoFree"); |
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return; } |
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atomic_dec(&tconInfoAllocCount); |
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kfree(buf_to_free->nativeFileSystem); |
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if (buf_to_free->password) { memset(buf_to_free->password, 0, strlen(buf_to_free->password)); kfree(buf_to_free->password); } |
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kfree(buf_to_free); } struct smb_hdr * cifs_buf_get(void) { struct smb_hdr *ret_buf = NULL; |
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/* We could use negotiated size instead of max_msgsize - but it may be more efficient to always alloc same size albeit slightly larger than necessary and maxbuffersize |
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defaults to this and can not be bigger */ |
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ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS); |
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/* clear the first few header bytes */ /* for most paths, more is cleared in header_assemble */ if (ret_buf) { memset(ret_buf, 0, sizeof(struct smb_hdr) + 3); atomic_inc(&bufAllocCount); |
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#ifdef CONFIG_CIFS_STATS2 atomic_inc(&totBufAllocCount); #endif /* CONFIG_CIFS_STATS2 */ |
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} return ret_buf; } void cifs_buf_release(void *buf_to_free) { |
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if (buf_to_free == NULL) { |
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/* cFYI(1, "Null buffer passed to cifs_buf_release");*/ |
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return; } |
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mempool_free(buf_to_free, cifs_req_poolp); |
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atomic_dec(&bufAllocCount); return; } struct smb_hdr * cifs_small_buf_get(void) { struct smb_hdr *ret_buf = NULL; |
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/* We could use negotiated size instead of max_msgsize - but it may be more efficient to always alloc same size albeit slightly larger than necessary and maxbuffersize |
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defaults to this and can not be bigger */ |
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ret_buf = mempool_alloc(cifs_sm_req_poolp, GFP_NOFS); |
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if (ret_buf) { /* No need to clear memory here, cleared in header assemble */ /* memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/ atomic_inc(&smBufAllocCount); |
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#ifdef CONFIG_CIFS_STATS2 atomic_inc(&totSmBufAllocCount); #endif /* CONFIG_CIFS_STATS2 */ |
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} return ret_buf; } void cifs_small_buf_release(void *buf_to_free) { if (buf_to_free == NULL) { |
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cFYI(1, "Null buffer passed to cifs_small_buf_release"); |
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return; } |
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mempool_free(buf_to_free, cifs_sm_req_poolp); |
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atomic_dec(&smBufAllocCount); return; } |
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/* |
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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 |
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64K-1 requests can be outstanding at one time. If no |
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mids are available, return zero. A future optimization could make the combination of mids and uid the key we use |
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to demultiplex on (rather than mid alone). |
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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) |
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we do have to limit the number of outstanding requests |
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to somewhat less than 64K-1 although it is hard to imagine so many threads being in the vfs at one time. */ __u16 GetNextMid(struct TCP_Server_Info *server) { __u16 mid = 0; __u16 last_mid; |
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int collision; |
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if (server == NULL) |
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return mid; spin_lock(&GlobalMid_Lock); last_mid = server->CurrentMid; /* we do not want to loop forever */ server->CurrentMid++; /* This nested loop looks more expensive than it is. |
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In practice the list of pending requests is short, |
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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) */ |
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while (server->CurrentMid != last_mid) { |
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struct list_head *tmp; struct mid_q_entry *mid_entry; collision = 0; |
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if (server->CurrentMid == 0) |
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server->CurrentMid++; list_for_each(tmp, &server->pending_mid_q) { mid_entry = list_entry(tmp, struct mid_q_entry, qhead); if ((mid_entry->mid == server->CurrentMid) && (mid_entry->midState == MID_REQUEST_SUBMITTED)) { /* This mid is in use, try a different one */ collision = 1; break; } } |
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if (collision == 0) { |
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mid = server->CurrentMid; break; } server->CurrentMid++; } spin_unlock(&GlobalMid_Lock); return mid; } /* NB: MID can not be set if treeCon not passed in, in that case it is responsbility of caller to set the mid */ |
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void header_assemble(struct smb_hdr *buffer, char smb_command /* command */ , const struct cifsTconInfo *treeCon, int word_count /* length of fixed section (word count) in two byte units */) { |
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struct list_head *temp_item; struct cifsSesInfo *ses; |
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char *temp = (char *) buffer; |
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memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */ |
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buffer->smb_buf_length = |
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(2 * word_count) + sizeof(struct smb_hdr) - |
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4 /* RFC 1001 length field does not count */ + 2 /* for bcc field itself */ ; |
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/* Note that this is the only network field that has to be converted to big endian and it is done just before we send it */ |
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buffer->Protocol[0] = 0xFF; buffer->Protocol[1] = 'S'; buffer->Protocol[2] = 'M'; buffer->Protocol[3] = 'B'; buffer->Command = smb_command; buffer->Flags = 0x00; /* case sensitive */ buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES; buffer->Pid = cpu_to_le16((__u16)current->tgid); buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16)); |
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if (treeCon) { buffer->Tid = treeCon->tid; if (treeCon->ses) { if (treeCon->ses->capabilities & CAP_UNICODE) buffer->Flags2 |= SMBFLG2_UNICODE; |
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if (treeCon->ses->capabilities & CAP_STATUS32) |
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buffer->Flags2 |= SMBFLG2_ERR_STATUS; |
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/* Uid is not converted */ buffer->Uid = treeCon->ses->Suid; buffer->Mid = GetNextMid(treeCon->ses->server); |
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if (multiuser_mount != 0) { |
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/* For the multiuser case, there are few obvious technically */ /* possible mechanisms to match the local linux user (uid) */ /* to a valid remote smb user (smb_uid): */ /* 1) Query Winbind (or other local pam/nss daemon */ /* for userid/password/logon_domain or credential */ /* 2) Query Winbind for uid to sid to username mapping */ /* and see if we have a matching password for existing*/ /* session for that user perhas getting password by */ /* adding a new pam_cifs module that stores passwords */ /* so that the cifs vfs can get at that for all logged*/ /* on users */ /* 3) (Which is the mechanism we have chosen) */ /* Search through sessions to the same server for a */ /* a match on the uid that was passed in on mount */ /* with the current processes uid (or euid?) and use */ /* that smb uid. If no existing smb session for */ /* that uid found, use the default smb session ie */ /* the smb session for the volume mounted which is */ /* the same as would be used if the multiuser mount */ /* flag were disabled. */ /* BB Add support for establishing new tCon and SMB Session */ |
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/* with userid/password pairs found on the smb session */ |
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/* for other target tcp/ip addresses BB */ |
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if (current_fsuid() != treeCon->ses->linux_uid) { |
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cFYI(1, "Multiuser mode and UID " "did not match tcon uid"); |
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read_lock(&cifs_tcp_ses_lock); list_for_each(temp_item, &treeCon->ses->server->smb_ses_list) { ses = list_entry(temp_item, struct cifsSesInfo, smb_ses_list); |
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if (ses->linux_uid == current_fsuid()) { |
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if (ses->server == treeCon->ses->server) { |
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cFYI(1, "found matching uid substitute right smb_uid"); |
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buffer->Uid = ses->Suid; break; } else { |
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/* BB eventually call cifs_setup_session here */ |
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cFYI(1, "local UID found but no smb sess with this server exists"); |
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} } } |
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read_unlock(&cifs_tcp_ses_lock); |
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} } } if (treeCon->Flags & SMB_SHARE_IS_IN_DFS) buffer->Flags2 |= SMBFLG2_DFS; |
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if (treeCon->nocase) buffer->Flags |= SMBFLG_CASELESS; |
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if ((treeCon->ses) && (treeCon->ses->server)) if (treeCon->ses->server->secMode & |
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(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; } /* endian conversion of flags is now done just before sending */ buffer->WordCount = (char) word_count; return; } |
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static int |
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checkSMBhdr(struct smb_hdr *smb, __u16 mid) { |
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/* Make sure that this really is an SMB, that it is a response, |
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and that the message ids match */ |
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if ((*(__le32 *) smb->Protocol == cpu_to_le32(0x424d53ff)) && (mid == smb->Mid)) { |
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if (smb->Flags & SMBFLG_RESPONSE) |
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return 0; else { |
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/* only one valid case where server sends us request */ |
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if (smb->Command == SMB_COM_LOCKING_ANDX) |
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return 0; else |
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cERROR(1, "Received Request not response"); |
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} } else { /* bad signature or mid */ if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) |
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cERROR(1, "Bad protocol string signature header %x", *(unsigned int *) smb->Protocol); |
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if (mid != smb->Mid) |
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cERROR(1, "Mids do not match"); |
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} |
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cERROR(1, "bad smb detected. The Mid=%d", smb->Mid); |
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return 1; } int |
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checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length) |
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{ |
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__u32 len = smb->smb_buf_length; |
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__u32 clc_len; /* calculated length */ |
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cFYI(0, "checkSMB Length: 0x%x, smb_buf_length: 0x%x", length, len); |
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if (length < 2 + sizeof(struct smb_hdr)) { if ((length >= sizeof(struct smb_hdr) - 1) |
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&& (smb->Status.CifsError != 0)) { |
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smb->WordCount = 0; /* some error cases do not return wct and bcc */ return 0; |
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} else if ((length == sizeof(struct smb_hdr) + 1) && |
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(smb->WordCount == 0)) { |
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char *tmp = (char *)smb; |
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/* Need to work around a bug in two servers here */ /* First, check if the part of bcc they sent was zero */ if (tmp[sizeof(struct smb_hdr)] == 0) { /* some servers return only half of bcc * on simple responses (wct, bcc both zero) * in particular have seen this on * ulogoffX and FindClose. This leaves * one byte of bcc potentially unitialized */ /* zero rest of bcc */ tmp[sizeof(struct smb_hdr)+1] = 0; |
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return 0; |
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} |
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cERROR(1, "rcvd invalid byte count (bcc)"); |
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} else { |
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cERROR(1, "Length less than smb header size"); |
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} |
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return 1; } if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
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cERROR(1, "smb length greater than MaxBufSize, mid=%d", smb->Mid); |
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return 1; } if (checkSMBhdr(smb, mid)) return 1; |
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clc_len = smbCalcSize_LE(smb); |
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if (4 + len != length) { |
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cERROR(1, "Length read does not match RFC1001 length %d", len); |
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return 1; } if (4 + len != clc_len) { /* check if bcc wrapped around for large read responses */ |
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if ((len > 64 * 1024) && (len > clc_len)) { |
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/* check if lengths match mod 64K */ |
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if (((4 + len) & 0xFFFF) == (clc_len & 0xFFFF)) |
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return 0; /* bcc wrapped */ |
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} |
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cFYI(1, "Calculated size %d vs length %d mismatch for mid %d", clc_len, 4 + len, smb->Mid); |
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/* Windows XP can return a few bytes too much, presumably |
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an illegal pad, at the end of byte range lock responses |
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so we allow for that three byte pad, as long as actual |
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received length is as long or longer than calculated length */ |
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/* We have now had to extend this more, since there is a |
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case in which it needs to be bigger still to handle a malformed response to transact2 findfirst from WinXP when access denied is returned and thus bcc and wct are zero but server says length is 0x21 bytes too long as if the server forget to reset the smb rfc1001 length when it reset the wct and bcc to minimum size and drop the t2 parms and data */ |
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if ((4+len > clc_len) && (len <= clc_len + 512)) |
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return 0; |
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else { |
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cERROR(1, "RFC1001 size %d bigger than SMB for Mid=%d", len, smb->Mid); |
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return 1; |
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} |
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} |
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return 0; |
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} |
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bool |
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is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) |
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{ struct smb_com_lock_req *pSMB = (struct smb_com_lock_req *)buf; |
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struct list_head *tmp, *tmp1, *tmp2; struct cifsSesInfo *ses; |
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|
490 |
struct cifsTconInfo *tcon; |
f1987b44f
|
491 |
struct cifsInodeInfo *pCifsInode; |
1da177e4c
|
492 |
struct cifsFileInfo *netfile; |
b6b38f704
|
493 |
cFYI(1, "Checking for oplock break or dnotify response"); |
790fe579f
|
494 |
if ((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) && |
1da177e4c
|
495 |
(pSMB->hdr.Flags & SMBFLG_RESPONSE)) { |
fb8c4b14d
|
496 |
struct smb_com_transaction_change_notify_rsp *pSMBr = |
1da177e4c
|
497 |
(struct smb_com_transaction_change_notify_rsp *)buf; |
fb8c4b14d
|
498 |
struct file_notify_information *pnotify; |
1da177e4c
|
499 |
__u32 data_offset = 0; |
790fe579f
|
500 |
if (pSMBr->ByteCount > sizeof(struct file_notify_information)) { |
1da177e4c
|
501 |
data_offset = le32_to_cpu(pSMBr->DataOffset); |
3979877e5
|
502 503 |
pnotify = (struct file_notify_information *) ((char *)&pSMBr->hdr.Protocol + data_offset); |
b6b38f704
|
504 505 |
cFYI(1, "dnotify on %s Action: 0x%x", pnotify->FileName, pnotify->Action); |
fb8c4b14d
|
506 |
/* cifs_dump_mem("Rcvd notify Data: ",buf, |
3979877e5
|
507 |
sizeof(struct smb_hdr)+60); */ |
4b18f2a9c
|
508 |
return true; |
1da177e4c
|
509 |
} |
790fe579f
|
510 |
if (pSMBr->hdr.Status.CifsError) { |
b6b38f704
|
511 512 |
cFYI(1, "notify err 0x%d", pSMBr->hdr.Status.CifsError); |
4b18f2a9c
|
513 |
return true; |
1da177e4c
|
514 |
} |
4b18f2a9c
|
515 |
return false; |
fb8c4b14d
|
516 |
} |
790fe579f
|
517 |
if (pSMB->hdr.Command != SMB_COM_LOCKING_ANDX) |
4b18f2a9c
|
518 |
return false; |
790fe579f
|
519 |
if (pSMB->hdr.Flags & SMBFLG_RESPONSE) { |
1da177e4c
|
520 521 522 523 |
/* no sense logging error on invalid handle on oplock break - harmless race between close request and oplock break response is expected from time to time writing out large dirty files cached on the client */ |
fb8c4b14d
|
524 525 |
if ((NT_STATUS_INVALID_HANDLE) == le32_to_cpu(pSMB->hdr.Status.CifsError)) { |
b6b38f704
|
526 |
cFYI(1, "invalid handle on oplock break"); |
4b18f2a9c
|
527 |
return true; |
fb8c4b14d
|
528 |
} else if (ERRbadfid == |
1da177e4c
|
529 |
le16_to_cpu(pSMB->hdr.Status.DosError.Error)) { |
4b18f2a9c
|
530 |
return true; |
1da177e4c
|
531 |
} else { |
4b18f2a9c
|
532 |
return false; /* on valid oplock brk we get "request" */ |
1da177e4c
|
533 534 |
} } |
790fe579f
|
535 |
if (pSMB->hdr.WordCount != 8) |
4b18f2a9c
|
536 |
return false; |
1da177e4c
|
537 |
|
b6b38f704
|
538 539 |
cFYI(1, "oplock type 0x%d level 0x%d", pSMB->LockType, pSMB->OplockLevel); |
790fe579f
|
540 |
if (!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE)) |
4b18f2a9c
|
541 |
return false; |
1da177e4c
|
542 543 |
/* look up tcon based on tid & uid */ |
f1987b44f
|
544 545 546 547 548 549 550 |
read_lock(&cifs_tcp_ses_lock); list_for_each(tmp, &srv->smb_ses_list) { ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); list_for_each(tmp1, &ses->tcon_list) { tcon = list_entry(tmp1, struct cifsTconInfo, tcon_list); if (tcon->tid != buf->Tid) continue; |
a45443475
|
551 |
cifs_stats_inc(&tcon->num_oplock_brks); |
058daf4f6
|
552 |
read_lock(&GlobalSMBSeslock); |
f1987b44f
|
553 554 |
list_for_each(tmp2, &tcon->openFileList) { netfile = list_entry(tmp2, struct cifsFileInfo, |
57337e42f
|
555 |
tlist); |
f1987b44f
|
556 557 |
if (pSMB->Fid != netfile->netfid) continue; |
3bc303c25
|
558 559 560 561 562 563 564 565 566 |
/* * don't do anything if file is about to be * closed anyway. */ if (netfile->closePend) { read_unlock(&GlobalSMBSeslock); read_unlock(&cifs_tcp_ses_lock); return true; } |
b6b38f704
|
567 |
cFYI(1, "file id match, oplock break"); |
f1987b44f
|
568 569 570 571 |
pCifsInode = CIFS_I(netfile->pInode); pCifsInode->clientCanCacheAll = false; if (pSMB->OplockLevel == 0) pCifsInode->clientCanCacheRead = false; |
9b6469724
|
572 573 574 575 576 577 578 579 580 581 582 |
/* * cifs_oplock_break_put() can't be called * from here. Get reference after queueing * succeeded. cifs_oplock_break() will * synchronize using GlobalSMSSeslock. */ if (queue_work(system_nrt_wq, &netfile->oplock_break)) cifs_oplock_break_get(netfile); netfile->oplock_break_cancelled = false; |
3bc303c25
|
583 584 |
read_unlock(&GlobalSMBSeslock); read_unlock(&cifs_tcp_ses_lock); |
f1987b44f
|
585 |
return true; |
1da177e4c
|
586 |
} |
058daf4f6
|
587 |
read_unlock(&GlobalSMBSeslock); |
f1987b44f
|
588 |
read_unlock(&cifs_tcp_ses_lock); |
b6b38f704
|
589 |
cFYI(1, "No matching file for oplock break"); |
4b18f2a9c
|
590 |
return true; |
1da177e4c
|
591 592 |
} } |
f1987b44f
|
593 |
read_unlock(&cifs_tcp_ses_lock); |
b6b38f704
|
594 |
cFYI(1, "Can not process oplock break for non-existent connection"); |
4b18f2a9c
|
595 |
return true; |
1da177e4c
|
596 597 598 599 600 601 602 603 604 605 606 607 608 609 |
} void dump_smb(struct smb_hdr *smb_buf, int smb_buf_length) { int i, j; char debug_line[17]; unsigned char *buffer; if (traceSMB == 0) return; buffer = (unsigned char *) smb_buf; for (i = 0, j = 0; i < smb_buf_length; i++, j++) { |
ad7a2926b
|
610 611 |
if (i % 8 == 0) { /* have reached the beginning of line */ |
1da177e4c
|
612 613 614 615 616 617 618 619 620 |
printk(KERN_DEBUG "| "); j = 0; } printk("%0#4x ", buffer[i]); debug_line[2 * j] = ' '; if (isprint(buffer[i])) debug_line[1 + (2 * j)] = buffer[i]; else debug_line[1 + (2 * j)] = '_'; |
ad7a2926b
|
621 622 |
if (i % 8 == 7) { /* reached end of line, time to print ascii */ |
1da177e4c
|
623 624 625 626 627 628 629 630 631 632 |
debug_line[16] = 0; printk(" | %s ", debug_line); } } for (; j < 8; j++) { printk(" "); debug_line[2 * j] = ' '; debug_line[1 + (2 * j)] = ' '; } |
ad7a2926b
|
633 634 |
printk(" | %s ", debug_line); |
1da177e4c
|
635 636 |
return; } |
6a0b48245
|
637 |
|
6c91d362f
|
638 639 640 641 642 |
/* Convert 16 bit Unicode pathname to wire format from string in current code page. Conversion may involve remapping up the seven characters that are only legal in POSIX-like OS (if they are present in the string). Path names are little endian 16 bit Unicode on the wire */ int |
fb8c4b14d
|
643 644 |
cifsConvertToUCS(__le16 *target, const char *source, int maxlen, const struct nls_table *cp, int mapChars) |
6c91d362f
|
645 |
{ |
fb8c4b14d
|
646 |
int i, j, charlen; |
6c91d362f
|
647 648 |
int len_remaining = maxlen; char src_char; |
70ca734a1
|
649 |
__u16 temp; |
6c91d362f
|
650 |
|
790fe579f
|
651 |
if (!mapChars) |
e89dc9209
|
652 |
return cifs_strtoUCS(target, source, PATH_MAX, cp); |
6c91d362f
|
653 |
|
fb8c4b14d
|
654 |
for (i = 0, j = 0; i < maxlen; j++) { |
6c91d362f
|
655 656 657 |
src_char = source[i]; switch (src_char) { case 0: |
f4cfd69cf
|
658 |
target[j] = 0; |
6c91d362f
|
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 |
goto ctoUCS_out; case ':': target[j] = cpu_to_le16(UNI_COLON); break; case '*': target[j] = cpu_to_le16(UNI_ASTERIK); break; case '?': target[j] = cpu_to_le16(UNI_QUESTION); break; case '<': target[j] = cpu_to_le16(UNI_LESSTHAN); break; case '>': target[j] = cpu_to_le16(UNI_GRTRTHAN); break; case '|': target[j] = cpu_to_le16(UNI_PIPE); |
fb8c4b14d
|
677 |
break; |
6c91d362f
|
678 679 680 681 682 683 684 685 |
/* BB We can not handle remapping slash until all the calls to build_path_from_dentry are modified, as they use slash as separator BB */ /* case '\\': target[j] = cpu_to_le16(UNI_SLASH); break;*/ default: charlen = cp->char2uni(source+i, |
70ca734a1
|
686 |
len_remaining, &temp); |
6c91d362f
|
687 688 |
/* if no match, use question mark, which at least in some cases servers as wild card */ |
790fe579f
|
689 |
if (charlen < 1) { |
6c91d362f
|
690 691 |
target[j] = cpu_to_le16(0x003f); charlen = 1; |
70ca734a1
|
692 693 |
} else target[j] = cpu_to_le16(temp); |
6c91d362f
|
694 695 696 697 |
len_remaining -= charlen; /* character may take more than one byte in the the source string, but will take exactly two bytes in the target string */ |
fb8c4b14d
|
698 |
i += charlen; |
6c91d362f
|
699 700 701 702 703 704 705 706 707 |
continue; } i++; /* move to next char in source string */ len_remaining--; } ctoUCS_out: return i; } |
ec06aedd4
|
708 709 710 711 712 |
void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb) { if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
f534dc994
|
713 |
cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; |
b6b38f704
|
714 |
cERROR(1, "Autodisabling the use of server inode numbers on " |
ec06aedd4
|
715 716 717 718 |
"%s. This server doesn't seem to support them " "properly. Hardlinks will not be recognized on this " "mount. Consider mounting with the \"noserverino\" " "option to silence this message.", |
b6b38f704
|
719 |
cifs_sb->tcon->treeName); |
ec06aedd4
|
720 721 |
} } |