From patchwork Wed Jul 18 15:48:55 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Shilovsky X-Patchwork-Id: 1212281 Return-Path: X-Original-To: patchwork-cifs-client@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 8B7643FD4F for ; Wed, 18 Jul 2012 15:51:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754811Ab2GRPvS (ORCPT ); Wed, 18 Jul 2012 11:51:18 -0400 Received: from mail-bk0-f46.google.com ([209.85.214.46]:46425 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754761Ab2GRPvR (ORCPT ); Wed, 18 Jul 2012 11:51:17 -0400 Received: by mail-bk0-f46.google.com with SMTP id j10so1564621bkw.19 for ; Wed, 18 Jul 2012 08:51:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:subject:date:message-id:x-mailer:in-reply-to :references; bh=J2IYcs0MtTexUYQa9JxMLB0x9iuELv3bVmcO/QSggGg=; b=tMc8wJ2JCQmy40NdPhEoYUvtbFF4ODxzD2BD7cUjx2bFPXeg+9JkzoKqAvBONEg00e Aj4h15qx5I6JTBbv9c6dTgA1JCHwLiURfZnrGR1AczQZ5KTlJdMVwddrr7b2+P5JraYl DO27VnOrNKIBDEWROyo7z/lultPboMxoDw+87kxViZSx2E49smS2YKJ2f0wgHOnTg8j2 CLZW10AjgaXfqBcx88l5/BVLOj3VjGh04aSDLdtP/JpNYzjXc8hn8OyVo5APgrh0pFP7 34DaZf5mTI/EnuinyY9ZWuRLacam2N9c/W8fCEQSdmufXGY74EPaO40PogdcH6RE40JN WqYA== Received: by 10.152.144.138 with SMTP id sm10mr4104980lab.22.1342626676665; Wed, 18 Jul 2012 08:51:16 -0700 (PDT) Received: from localhost.localdomain ([178.45.208.11]) by mx.google.com with ESMTPS id p2sm4826985lbj.4.2012.07.18.08.51.08 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 18 Jul 2012 08:51:09 -0700 (PDT) From: Pavel Shilovsky To: linux-cifs@vger.kernel.org Subject: [PATCH 39/45] CIFS: Move readdir code to ops struct Date: Wed, 18 Jul 2012 19:48:55 +0400 Message-Id: <1342626541-29872-40-git-send-email-pshilovsky@samba.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1342626541-29872-1-git-send-email-pshilovsky@samba.org> References: <1342626541-29872-1-git-send-email-pshilovsky@samba.org> Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Signed-off-by: Pavel Shilovsky --- fs/cifs/cifsglob.h | 15 +++++ fs/cifs/cifsproto.h | 2 +- fs/cifs/file.c | 62 +++++++++++-------- fs/cifs/netmisc.c | 3 +- fs/cifs/readdir.c | 165 ++++++++++++++++++++++++++++----------------------- fs/cifs/smb1ops.c | 31 ++++++++++ 6 files changed, 174 insertions(+), 104 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 7c20d5a..406ad6d 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -177,6 +177,7 @@ struct cifs_fid; struct cifs_readdata; struct cifs_writedata; struct cifs_io_parms; +struct cifs_search_info; struct smb_version_operations { int (*send_cancel)(struct TCP_Server_Info *, void *, @@ -313,6 +314,20 @@ struct smb_version_operations { int (*sync_write)(const unsigned int, struct cifsFileInfo *, struct cifs_io_parms *, unsigned int *, struct kvec *, unsigned long); + /* open dir, start readdir */ + int (*query_dir_first)(const unsigned int, struct cifs_tcon *, + const char *, struct cifs_sb_info *, + struct cifs_fid *, __u16, + struct cifs_search_info *); + /* continue readdir */ + int (*query_dir_next)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *, + __u16, struct cifs_search_info *srch_inf); + /* close dir */ + int (*close_dir)(const unsigned int, struct cifs_tcon *, + struct cifs_fid *); + /* calculate a size of SMB message */ + unsigned int (*calc_smb_size)(void *); }; struct smb_version_values { diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 6e04941..afc0797 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -100,7 +100,7 @@ extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, unsigned int bytes_written); extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool); extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool); -extern unsigned int smbCalcSize(struct smb_hdr *ptr); +extern unsigned int smbCalcSize(void *buf); extern int decode_negTokenInit(unsigned char *security_blob, int length, struct TCP_Server_Info *server); extern int cifs_convert_address(struct sockaddr *dst, const char *src, int len); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 2ffee05..da9dc50 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -609,39 +609,47 @@ int cifs_closedir(struct inode *inode, struct file *file) int rc = 0; unsigned int xid; struct cifsFileInfo *cfile = file->private_data; - char *tmp; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + char *buf; cFYI(1, "Closedir inode = 0x%p", inode); + if (cfile == NULL) + return rc; + xid = get_xid(); + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; - if (cfile) { - struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + cFYI(1, "Freeing private data in close dir"); + spin_lock(&cifs_file_list_lock); + if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { + cfile->invalidHandle = true; + spin_unlock(&cifs_file_list_lock); + if (server->ops->close_dir) + rc = server->ops->close_dir(xid, tcon, &cfile->fid); + else + rc = -ENOSYS; + cFYI(1, "Closing uncompleted readdir with rc %d", rc); + /* not much we can do if it fails anyway, ignore rc */ + rc = 0; + } else + spin_unlock(&cifs_file_list_lock); - cFYI(1, "Freeing private data in close dir"); - spin_lock(&cifs_file_list_lock); - if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { - cfile->invalidHandle = true; - spin_unlock(&cifs_file_list_lock); - rc = CIFSFindClose(xid, tcon, cfile->fid.netfid); - cFYI(1, "Closing uncompleted readdir with rc %d", rc); - /* not much we can do if it fails anyway, ignore rc */ - rc = 0; - } else - spin_unlock(&cifs_file_list_lock); - tmp = cfile->srch_inf.ntwrk_buf_start; - if (tmp) { - cFYI(1, "closedir free smb buf in srch struct"); - cfile->srch_inf.ntwrk_buf_start = NULL; - if (cfile->srch_inf.smallBuf) - cifs_small_buf_release(tmp); - else - cifs_buf_release(tmp); - } - cifs_put_tlink(cfile->tlink); - kfree(file->private_data); - file->private_data = NULL; + buf = cfile->srch_inf.ntwrk_buf_start; + if (buf) { + cFYI(1, "closedir free smb buf in srch struct"); + cfile->srch_inf.ntwrk_buf_start = NULL; + if (cfile->srch_inf.smallBuf) + cifs_small_buf_release(buf); + else + cifs_buf_release(buf); } + + cifs_put_tlink(cfile->tlink); + kfree(file->private_data); + file->private_data = NULL; /* BB can we lock the filestruct while this is going on? */ free_xid(xid); return rc; diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index 581c225..e7bab3b 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -913,8 +913,9 @@ map_smb_to_linux_error(char *buf, bool logErr) * portion, the number of word parameters and the data portion of the message */ unsigned int -smbCalcSize(struct smb_hdr *ptr) +smbCalcSize(void *buf) { + struct smb_hdr *ptr = (struct smb_hdr *)buf; return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) + 2 /* size of the bcc field */ + get_bcc(ptr)); } diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 9e76e3b..b0f4a42 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -220,7 +220,8 @@ int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, } */ -static int initiate_cifs_search(const unsigned int xid, struct file *file) +static int +initiate_cifs_search(const unsigned int xid, struct file *file) { __u16 search_flags; int rc = 0; @@ -229,6 +230,7 @@ static int initiate_cifs_search(const unsigned int xid, struct file *file) struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); struct tcon_link *tlink = NULL; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; if (file->private_data == NULL) { tlink = cifs_sb_tlink(cifs_sb); @@ -248,6 +250,13 @@ static int initiate_cifs_search(const unsigned int xid, struct file *file) tcon = tlink_tcon(cifsFile->tlink); } + server = tcon->ses->server; + + if (!server->ops->query_dir_first) { + rc = -ENOSYS; + goto error_exit; + } + cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; @@ -278,10 +287,10 @@ ffirst_retry: if (backup_cred(cifs_sb)) search_flags |= CIFS_SEARCH_BACKUP_SEARCH; - rc = CIFSFindFirst(xid, tcon, full_path, cifs_sb->local_nls, - &cifsFile->fid.netfid, search_flags, &cifsFile->srch_inf, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); + rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb, + &cifsFile->fid, search_flags, + &cifsFile->srch_inf); + if (rc == 0) cifsFile->invalidHandle = false; /* BB add following call to handle readdir on new NTFS symlink errors @@ -501,62 +510,67 @@ static int cifs_save_resume_key(const char *current_entry, return rc; } -/* find the corresponding entry in the search */ -/* Note that the SMB server returns search entries for . and .. which - complicates logic here if we choose to parse for them and we do not - assume that they are located in the findfirst return buffer.*/ -/* We start counting in the buffer with entry 2 and increment for every - entry (do not increment for . or .. entry) */ -static int find_cifs_entry(const unsigned int xid, struct cifs_tcon *pTcon, - struct file *file, char **ppCurrentEntry, int *num_to_ret) +/* + * Find the corresponding entry in the search. Note that the SMB server returns + * search entries for . and .. which complicates logic here if we choose to + * parse for them and we do not assume that they are located in the findfirst + * return buffer. We start counting in the buffer with entry 2 and increment for + * every entry (do not increment for . or .. entry). + */ +static int +find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, + struct file *file, char **current_entry, int *num_to_ret) { __u16 search_flags; int rc = 0; int pos_in_buf = 0; loff_t first_entry_in_buffer; loff_t index_to_find = file->f_pos; - struct cifsFileInfo *cifsFile = file->private_data; + struct cifsFileInfo *cfile = file->private_data; struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); + struct TCP_Server_Info *server = tcon->ses->server; /* check if index in the buffer */ - if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || - (num_to_ret == NULL)) + if (!server->ops->query_dir_first || !server->ops->query_dir_next) + return -ENOSYS; + + if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL)) return -ENOENT; - *ppCurrentEntry = NULL; - first_entry_in_buffer = - cifsFile->srch_inf.index_of_last_entry - - cifsFile->srch_inf.entries_in_buffer; + *current_entry = NULL; + first_entry_in_buffer = cfile->srch_inf.index_of_last_entry - + cfile->srch_inf.entries_in_buffer; - /* if first entry in buf is zero then is first buffer - in search response data which means it is likely . and .. - will be in this buffer, although some servers do not return - . and .. for the root of a drive and for those we need - to start two entries earlier */ + /* + * If first entry in buf is zero then is first buffer + * in search response data which means it is likely . and .. + * will be in this buffer, although some servers do not return + * . and .. for the root of a drive and for those we need + * to start two entries earlier. + */ dump_cifs_file_struct(file, "In fce "); - if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && - is_dir_changed(file)) || - (index_to_find < first_entry_in_buffer)) { + if (((index_to_find < cfile->srch_inf.index_of_last_entry) && + is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) { /* close and restart search */ cFYI(1, "search backing up - close and restart search"); spin_lock(&cifs_file_list_lock); - if (!cifsFile->srch_inf.endOfSearch && - !cifsFile->invalidHandle) { - cifsFile->invalidHandle = true; + if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { + cfile->invalidHandle = true; spin_unlock(&cifs_file_list_lock); - CIFSFindClose(xid, pTcon, cifsFile->fid.netfid); + if (server->ops->close) + server->ops->close(xid, tcon, &cfile->fid); } else spin_unlock(&cifs_file_list_lock); - if (cifsFile->srch_inf.ntwrk_buf_start) { + if (cfile->srch_inf.ntwrk_buf_start) { cFYI(1, "freeing SMB ff cache buf on search rewind"); - if (cifsFile->srch_inf.smallBuf) - cifs_small_buf_release(cifsFile->srch_inf. + if (cfile->srch_inf.smallBuf) + cifs_small_buf_release(cfile->srch_inf. ntwrk_buf_start); else - cifs_buf_release(cifsFile->srch_inf. + cifs_buf_release(cfile->srch_inf. ntwrk_buf_start); - cifsFile->srch_inf.ntwrk_buf_start = NULL; + cfile->srch_inf.ntwrk_buf_start = NULL; } rc = initiate_cifs_search(xid, file); if (rc) { @@ -565,65 +579,64 @@ static int find_cifs_entry(const unsigned int xid, struct cifs_tcon *pTcon, return rc; } /* FindFirst/Next set last_entry to NULL on malformed reply */ - if (cifsFile->srch_inf.last_entry) - cifs_save_resume_key(cifsFile->srch_inf.last_entry, - cifsFile); + if (cfile->srch_inf.last_entry) + cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); } search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME; if (backup_cred(cifs_sb)) search_flags |= CIFS_SEARCH_BACKUP_SEARCH; - while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && - (rc == 0) && !cifsFile->srch_inf.endOfSearch) { + while ((index_to_find >= cfile->srch_inf.index_of_last_entry) && + (rc == 0) && !cfile->srch_inf.endOfSearch) { cFYI(1, "calling findnext2"); - rc = CIFSFindNext(xid, pTcon, cifsFile->fid.netfid, - search_flags, &cifsFile->srch_inf); + rc = server->ops->query_dir_next(xid, tcon, &cfile->fid, + search_flags, + &cfile->srch_inf); /* FindFirst/Next set last_entry to NULL on malformed reply */ - if (cifsFile->srch_inf.last_entry) - cifs_save_resume_key(cifsFile->srch_inf.last_entry, - cifsFile); + if (cfile->srch_inf.last_entry) + cifs_save_resume_key(cfile->srch_inf.last_entry, cfile); if (rc) return -ENOENT; } - if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { + if (index_to_find < cfile->srch_inf.index_of_last_entry) { /* we found the buffer that contains the entry */ /* scan and find it */ int i; - char *current_entry; - char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + - smbCalcSize((struct smb_hdr *) - cifsFile->srch_inf.ntwrk_buf_start); - - current_entry = cifsFile->srch_inf.srch_entries_start; - first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry - - cifsFile->srch_inf.entries_in_buffer; + char *cur_ent; + char *end_of_smb = cfile->srch_inf.ntwrk_buf_start + + server->ops->calc_smb_size( + cfile->srch_inf.ntwrk_buf_start); + + cur_ent = cfile->srch_inf.srch_entries_start; + first_entry_in_buffer = cfile->srch_inf.index_of_last_entry + - cfile->srch_inf.entries_in_buffer; pos_in_buf = index_to_find - first_entry_in_buffer; cFYI(1, "found entry - pos_in_buf %d", pos_in_buf); - for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { + for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) { /* go entry by entry figuring out which is first */ - current_entry = nxt_dir_entry(current_entry, end_of_smb, - cifsFile->srch_inf.info_level); + cur_ent = nxt_dir_entry(cur_ent, end_of_smb, + cfile->srch_inf.info_level); } - if ((current_entry == NULL) && (i < pos_in_buf)) { + if ((cur_ent == NULL) && (i < pos_in_buf)) { /* BB fixme - check if we should flag this error */ cERROR(1, "reached end of buf searching for pos in buf" - " %d index to find %lld rc %d", - pos_in_buf, index_to_find, rc); + " %d index to find %lld rc %d", pos_in_buf, + index_to_find, rc); } rc = 0; - *ppCurrentEntry = current_entry; + *current_entry = cur_ent; } else { cFYI(1, "index not in buffer - could not findnext into it"); return 0; } - if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { + if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) { cFYI(1, "can not return entries pos_in_buf beyond last"); *num_to_ret = 0; } else - *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; + *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf; return rc; } @@ -723,7 +736,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) int rc = 0; unsigned int xid; int i; - struct cifs_tcon *pTcon; + struct cifs_tcon *tcon; struct cifsFileInfo *cifsFile = NULL; char *current_entry; int num_to_fill = 0; @@ -781,12 +794,12 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) } } /* else { cifsFile->invalidHandle = true; - CIFSFindClose(xid, pTcon, cifsFile->fid.netfid); + tcon->ses->server->close(xid, tcon, &cifsFile->fid); } */ - pTcon = tlink_tcon(cifsFile->tlink); - rc = find_cifs_entry(xid, pTcon, file, - ¤t_entry, &num_to_fill); + tcon = tlink_tcon(cifsFile->tlink); + rc = find_cifs_entry(xid, tcon, file, ¤t_entry, + &num_to_fill); if (rc) { cFYI(1, "fce error %d", rc); goto rddir2_exit; @@ -798,7 +811,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) } cFYI(1, "loop through %d times filling dir for net buf %p", num_to_fill, cifsFile->srch_inf.ntwrk_buf_start); - max_len = smbCalcSize((struct smb_hdr *) + max_len = tcon->ses->server->ops->calc_smb_size( cifsFile->srch_inf.ntwrk_buf_start); end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; @@ -815,10 +828,12 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) num_to_fill, i); break; } - /* if buggy server returns . and .. late do - we want to check for that here? */ - rc = cifs_filldir(current_entry, file, - filldir, direntry, tmp_buf, max_len); + /* + * if buggy server returns . and .. late do we want to + * check for that here? + */ + rc = cifs_filldir(current_entry, file, filldir, + direntry, tmp_buf, max_len); if (rc == -EOVERFLOW) { rc = 0; break; diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c index ed31196..068d609 100644 --- a/fs/cifs/smb1ops.c +++ b/fs/cifs/smb1ops.c @@ -836,6 +836,33 @@ out: return rc; } +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->local_nls, + &fid->netfid, search_flags, srch_inf, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); +} + +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); +} + struct smb_version_operations smb1_operations = { .send_cancel = send_nt_cancel, .compare_fids = cifs_compare_fids, @@ -891,6 +918,10 @@ struct smb_version_operations smb1_operations = { .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, }; struct smb_version_values smb1_values = {