diff options
Diffstat (limited to 'fs/cifs/readdir.c')
| -rw-r--r-- | fs/cifs/readdir.c | 867 |
1 files changed, 867 insertions, 0 deletions
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c new file mode 100644 index 0000000..f8bea39 --- /dev/null +++ b/fs/cifs/readdir.c @@ -0,0 +1,867 @@ +/* + * fs/cifs/readdir.c + * + * Directory search handling + * + * Copyright (C) International Business Machines Corp., 2004 + * 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 + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/fs.h> +#include <linux/stat.h> +#include <linux/smp_lock.h> +#include "cifspdu.h" +#include "cifsglob.h" +#include "cifsproto.h" +#include "cifs_unicode.h" +#include "cifs_debug.h" +#include "cifs_fs_sb.h" +#include "cifsfs.h" + +/* BB fixme - add debug wrappers around this function to disable it fixme BB */ +/* static void dump_cifs_file_struct(struct file *file, char *label) +{ + struct cifsFileInfo * cf; + + if(file) { + cf = file->private_data; + if(cf == NULL) { + cFYI(1,("empty cifs private file data")); + return; + } + if(cf->invalidHandle) { + cFYI(1,("invalid handle")); + } + if(cf->srch_inf.endOfSearch) { + cFYI(1,("end of search")); + } + if(cf->srch_inf.emptyDir) { + cFYI(1,("empty dir")); + } + + } +} */ + +/* Returns one if new inode created (which therefore needs to be hashed) */ +/* Might check in the future if inode number changed so we can rehash inode */ +static int construct_dentry(struct qstr *qstring, struct file *file, + struct inode **ptmp_inode, struct dentry **pnew_dentry) +{ + struct dentry *tmp_dentry; + struct cifs_sb_info *cifs_sb; + struct cifsTconInfo *pTcon; + int rc = 0; + + cFYI(1, ("For %s ", qstring->name)); + cifs_sb = CIFS_SB(file->f_dentry->d_sb); + pTcon = cifs_sb->tcon; + + qstring->hash = full_name_hash(qstring->name, qstring->len); + tmp_dentry = d_lookup(file->f_dentry, qstring); + if (tmp_dentry) { + cFYI(0, (" existing dentry with inode 0x%p", tmp_dentry->d_inode)); + *ptmp_inode = tmp_dentry->d_inode; +/* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ + if(*ptmp_inode == NULL) { + *ptmp_inode = new_inode(file->f_dentry->d_sb); + if(*ptmp_inode == NULL) + return rc; + rc = 1; + d_instantiate(tmp_dentry, *ptmp_inode); + } + } else { + tmp_dentry = d_alloc(file->f_dentry, qstring); + if(tmp_dentry == NULL) { + cERROR(1,("Failed allocating dentry")); + *ptmp_inode = NULL; + return rc; + } + + *ptmp_inode = new_inode(file->f_dentry->d_sb); + tmp_dentry->d_op = &cifs_dentry_ops; + if(*ptmp_inode == NULL) + return rc; + rc = 1; + d_instantiate(tmp_dentry, *ptmp_inode); + d_rehash(tmp_dentry); + } + + tmp_dentry->d_time = jiffies; + *pnew_dentry = tmp_dentry; + return rc; +} + +static void fill_in_inode(struct inode *tmp_inode, + FILE_DIRECTORY_INFO *pfindData, int *pobject_type) +{ + struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); + __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes); + __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize); + __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); + + cifsInfo->cifsAttrs = attr; + cifsInfo->time = jiffies; + + /* Linux can not store file creation time unfortunately so ignore it */ + tmp_inode->i_atime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); + tmp_inode->i_mtime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); + tmp_inode->i_ctime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); + /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ + /* 2767 perms - indicate mandatory locking */ + /* BB fill in uid and gid here? with help from winbind? + or retrieve from NTFS stream extended attribute */ + if (atomic_read(&cifsInfo->inUse) == 0) { + tmp_inode->i_uid = cifs_sb->mnt_uid; + tmp_inode->i_gid = cifs_sb->mnt_gid; + /* set default mode. will override for dirs below */ + tmp_inode->i_mode = cifs_sb->mnt_file_mode; + } + + cFYI(0,("CIFS FFIRST: Attributes came in as 0x%x",attr)); + if (attr & ATTR_DIRECTORY) { + *pobject_type = DT_DIR; + /* override default perms since we do not lock dirs */ + if(atomic_read(&cifsInfo->inUse) == 0) { + tmp_inode->i_mode = cifs_sb->mnt_dir_mode; + } + tmp_inode->i_mode |= S_IFDIR; +/* we no longer mark these because we could not follow them */ +/* } else if (attr & ATTR_REPARSE) { + *pobject_type = DT_LNK; + tmp_inode->i_mode |= S_IFLNK; */ + } else { + *pobject_type = DT_REG; + tmp_inode->i_mode |= S_IFREG; + if (attr & ATTR_READONLY) + tmp_inode->i_mode &= ~(S_IWUGO); + } /* could add code here - to validate if device or weird share type? */ + + /* can not fill in nlink here as in qpathinfo version and Unx search */ + if (atomic_read(&cifsInfo->inUse) == 0) { + atomic_set(&cifsInfo->inUse, 1); + } + + if (is_size_safe_to_change(cifsInfo)) { + /* can not safely change the file size here if the + client is writing to it due to potential races */ + i_size_write(tmp_inode, end_of_file); + + /* 512 bytes (2**9) is the fake blocksize that must be used */ + /* for this calculation, even though the reported blocksize is larger */ + tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; + } + + if (allocation_size < end_of_file) + cFYI(1, ("May be sparse file, allocation less than file size")); + cFYI(1, + ("File Size %ld and blocks %ld and blocksize %ld", + (unsigned long)tmp_inode->i_size, tmp_inode->i_blocks, + tmp_inode->i_blksize)); + if (S_ISREG(tmp_inode->i_mode)) { + cFYI(1, (" File inode ")); + tmp_inode->i_op = &cifs_file_inode_ops; + if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) + tmp_inode->i_fop = &cifs_file_direct_ops; + else + tmp_inode->i_fop = &cifs_file_ops; + tmp_inode->i_data.a_ops = &cifs_addr_ops; + } else if (S_ISDIR(tmp_inode->i_mode)) { + cFYI(1, (" Directory inode")); + tmp_inode->i_op = &cifs_dir_inode_ops; + tmp_inode->i_fop = &cifs_dir_ops; + } else if (S_ISLNK(tmp_inode->i_mode)) { + cFYI(1, (" Symbolic Link inode ")); + tmp_inode->i_op = &cifs_symlink_inode_ops; + } else { + cFYI(1, (" Init special inode ")); + init_special_inode(tmp_inode, tmp_inode->i_mode, + tmp_inode->i_rdev); + } +} + +static void unix_fill_in_inode(struct inode *tmp_inode, + FILE_UNIX_INFO *pfindData, int *pobject_type) +{ + struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); + + __u32 type = le32_to_cpu(pfindData->Type); + __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); + __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); + cifsInfo->time = jiffies; + atomic_inc(&cifsInfo->inUse); + + tmp_inode->i_atime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); + tmp_inode->i_mtime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); + tmp_inode->i_ctime = + cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); + + tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); + if (type == UNIX_FILE) { + *pobject_type = DT_REG; + tmp_inode->i_mode |= S_IFREG; + } else if (type == UNIX_SYMLINK) { + *pobject_type = DT_LNK; + tmp_inode->i_mode |= S_IFLNK; + } else if (type == UNIX_DIR) { + *pobject_type = DT_DIR; + tmp_inode->i_mode |= S_IFDIR; + } else if (type == UNIX_CHARDEV) { + *pobject_type = DT_CHR; + tmp_inode->i_mode |= S_IFCHR; + tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), + le64_to_cpu(pfindData->DevMinor) & MINORMASK); + } else if (type == UNIX_BLOCKDEV) { + *pobject_type = DT_BLK; + tmp_inode->i_mode |= S_IFBLK; + tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), + le64_to_cpu(pfindData->DevMinor) & MINORMASK); + } else if (type == UNIX_FIFO) { + *pobject_type = DT_FIFO; + tmp_inode->i_mode |= S_IFIFO; + } else if (type == UNIX_SOCKET) { + *pobject_type = DT_SOCK; + tmp_inode->i_mode |= S_IFSOCK; + } + + tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); + tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); + tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); + + if (is_size_safe_to_change(cifsInfo)) { + /* can not safely change the file size here if the + client is writing to it due to potential races */ + i_size_write(tmp_inode,end_of_file); + + /* 512 bytes (2**9) is the fake blocksize that must be used */ + /* for this calculation, not the real blocksize */ + tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; + } + + if (S_ISREG(tmp_inode->i_mode)) { + cFYI(1, ("File inode")); + tmp_inode->i_op = &cifs_file_inode_ops; + if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) + tmp_inode->i_fop = &cifs_file_direct_ops; + else + tmp_inode->i_fop = &cifs_file_ops; + tmp_inode->i_data.a_ops = &cifs_addr_ops; + } else if (S_ISDIR(tmp_inode->i_mode)) { + cFYI(1, ("Directory inode")); + tmp_inode->i_op = &cifs_dir_inode_ops; + tmp_inode->i_fop = &cifs_dir_ops; + } else if (S_ISLNK(tmp_inode->i_mode)) { + cFYI(1, ("Symbolic Link inode")); + tmp_inode->i_op = &cifs_symlink_inode_ops; +/* tmp_inode->i_fop = *//* do not need to set to anything */ + } else { + cFYI(1, ("Special inode")); + init_special_inode(tmp_inode, tmp_inode->i_mode, + tmp_inode->i_rdev); + } +} + +static int initiate_cifs_search(const int xid, struct file *file) +{ + int rc = 0; + char * full_path; + struct cifsFileInfo * cifsFile; + struct cifs_sb_info *cifs_sb; + struct cifsTconInfo *pTcon; + + if(file->private_data == NULL) { + file->private_data = + kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL); + } + + if(file->private_data == NULL) { + return -ENOMEM; + } else { + memset(file->private_data,0,sizeof(struct cifsFileInfo)); + } + cifsFile = file->private_data; + cifsFile->invalidHandle = TRUE; + cifsFile->srch_inf.endOfSearch = FALSE; + + if(file->f_dentry == NULL) + return -ENOENT; + + cifs_sb = CIFS_SB(file->f_dentry->d_sb); + if(cifs_sb == NULL) + return -EINVAL; + + pTcon = cifs_sb->tcon; + if(pTcon == NULL) + return -EINVAL; + + down(&file->f_dentry->d_sb->s_vfs_rename_sem); + full_path = build_wildcard_path_from_dentry(file->f_dentry); + up(&file->f_dentry->d_sb->s_vfs_rename_sem); + + if(full_path == NULL) { + return -ENOMEM; + } + + cFYI(1, ("Full path: %s start at: %lld ", full_path, file->f_pos)); + + /* test for Unix extensions */ + if (pTcon->ses->capabilities & CAP_UNIX) { + cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; + } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { + cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; + } else /* not srvinos - BB fixme add check for backlevel? */ { + cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; + } + + rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls, + &cifsFile->netfid, &cifsFile->srch_inf); + if(rc == 0) + cifsFile->invalidHandle = FALSE; + kfree(full_path); + return rc; +} + +/* return length of unicode string in bytes */ +static int cifs_unicode_bytelen(char *str) +{ + int len; + __le16 * ustr = (__le16 *)str; + + for(len=0;len <= PATH_MAX;len++) { + if(ustr[len] == 0) + return len << 1; + } + cFYI(1,("Unicode string longer than PATH_MAX found")); + return len << 1; +} + +static char *nxt_dir_entry(char *old_entry, char *end_of_smb) +{ + char * new_entry; + FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; + + new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); + cFYI(1,("new entry %p old entry %p",new_entry,old_entry)); + /* validate that new_entry is not past end of SMB */ + if(new_entry >= end_of_smb) { + cFYI(1,("search entry %p began after end of SMB %p old entry %p", + new_entry,end_of_smb,old_entry)); + return NULL; + } else + return new_entry; + +} + +#define UNICODE_DOT cpu_to_le16(0x2e) + +/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ +static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) +{ + int rc = 0; + char * filename = NULL; + int len = 0; + + if(cfile->srch_inf.info_level == 0x202) { + FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; + filename = &pFindData->FileName[0]; + if(cfile->srch_inf.unicode) { + len = cifs_unicode_bytelen(filename); + } else { + /* BB should we make this strnlen of PATH_MAX? */ + len = strnlen(filename, 5); + } + } else if(cfile->srch_inf.info_level == 0x101) { + FILE_DIRECTORY_INFO * pFindData = + (FILE_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else if(cfile->srch_inf.info_level == 0x102) { + FILE_FULL_DIRECTORY_INFO * pFindData = + (FILE_FULL_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else if(cfile->srch_inf.info_level == 0x105) { + SEARCH_ID_FULL_DIR_INFO * pFindData = + (SEARCH_ID_FULL_DIR_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else if(cfile->srch_inf.info_level == 0x104) { + FILE_BOTH_DIRECTORY_INFO * pFindData = + (FILE_BOTH_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else { + cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level)); + } + + if(filename) { + if(cfile->srch_inf.unicode) { + __le16 *ufilename = (__le16 *)filename; + if(len == 2) { + /* check for . */ + if(ufilename[0] == UNICODE_DOT) + rc = 1; + } else if(len == 4) { + /* check for .. */ + if((ufilename[0] == UNICODE_DOT) + &&(ufilename[1] == UNICODE_DOT)) + rc = 2; + } + } else /* ASCII */ { + if(len == 1) { + if(filename[0] == '.') + rc = 1; + } else if(len == 2) { + if((filename[0] == '.') && (filename[1] == '.')) + rc = 2; + } + } + } + + 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 int xid, struct cifsTconInfo *pTcon, + struct file *file, char **ppCurrentEntry, int *num_to_ret) +{ + 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; + /* check if index in the buffer */ + + if((cifsFile == NULL) || (ppCurrentEntry == 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; +/* dump_cifs_file_struct(file, "In fce ");*/ + if(index_to_find < first_entry_in_buffer) { + /* close and restart search */ + cFYI(1,("search backing up - close and restart search")); + cifsFile->invalidHandle = TRUE; + CIFSFindClose(xid, pTcon, cifsFile->netfid); + kfree(cifsFile->search_resume_name); + cifsFile->search_resume_name = NULL; + if(cifsFile->srch_inf.ntwrk_buf_start) { + cFYI(1,("freeing SMB ff cache buf on search rewind")); + cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start); + } + rc = initiate_cifs_search(xid,file); + if(rc) { + cFYI(1,("error %d reinitiating a search on rewind",rc)); + return rc; + } + } + + while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && + (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){ + cFYI(1,("calling findnext2")); + rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, &cifsFile->srch_inf); + if(rc) + return -ENOENT; + } + if(index_to_find < cifsFile->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); +/* dump_cifs_file_struct(file,"found entry in fce "); */ + first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry + - cifsFile->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)); + current_entry = cifsFile->srch_inf.srch_entries_start; + for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) { + /* go entry to next entry figuring out which we need to start with */ + /* if( . or ..) + skip */ + rc = cifs_entry_is_dot(current_entry,cifsFile); + if(rc == 1) /* is . or .. so skip */ { + cFYI(1,("Entry is .")); /* BB removeme BB */ + /* continue; */ + } else if (rc == 2 ) { + cFYI(1,("Entry is ..")); /* BB removeme BB */ + /* continue; */ + } + current_entry = nxt_dir_entry(current_entry,end_of_smb); + } + if((current_entry == 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)); + } + rc = 0; + *ppCurrentEntry = current_entry; + } else { + cFYI(1,("index not in buffer - could not findnext into it")); + return 0; + } + + if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { + cFYI(1,("can not return entries when pos_in_buf beyond last entry")); + *num_to_ret = 0; + } else + *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; +/* dump_cifs_file_struct(file, "end fce ");*/ + + return rc; +} + +/* inode num, inode type and filename returned */ +static int cifs_get_name_from_search_buf(struct qstr *pqst, + char *current_entry, __u16 level, unsigned int unicode, + struct cifs_sb_info * cifs_sb, ino_t *pinum) +{ + int rc = 0; + unsigned int len = 0; + char * filename; + struct nls_table * nlt = cifs_sb->local_nls; + + *pinum = 0; + + if(level == SMB_FIND_FILE_UNIX) { + FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; + + filename = &pFindData->FileName[0]; + if(unicode) { + len = cifs_unicode_bytelen(filename); + } else { + /* BB should we make this strnlen of PATH_MAX? */ + len = strnlen(filename, PATH_MAX); + } + + /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */ + if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) + *pinum = pFindData->UniqueId; + } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { + FILE_DIRECTORY_INFO * pFindData = + (FILE_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { + FILE_FULL_DIRECTORY_INFO * pFindData = + (FILE_FULL_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { + SEARCH_ID_FULL_DIR_INFO * pFindData = + (SEARCH_ID_FULL_DIR_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + *pinum = pFindData->UniqueId; + } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { + FILE_BOTH_DIRECTORY_INFO * pFindData = + (FILE_BOTH_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + } else { + cFYI(1,("Unknown findfirst level %d",level)); + return -EINVAL; + } + if(unicode) { + /* BB fixme - test with long names */ + /* Note converted filename can be longer than in unicode */ + pqst->len = cifs_strfromUCS_le((char *)pqst->name,(wchar_t *)filename,len/2,nlt); + } else { + pqst->name = filename; + pqst->len = len; + } + pqst->hash = full_name_hash(pqst->name,pqst->len); +/* cFYI(1,("filldir on %s",pqst->name)); */ + return rc; +} + +static int cifs_filldir(char *pfindEntry, struct file *file, + filldir_t filldir, void *direntry, char *scratch_buf) +{ + int rc = 0; + struct qstr qstring; + struct cifsFileInfo * pCifsF; + unsigned obj_type; + ino_t inum; + struct cifs_sb_info * cifs_sb; + struct inode *tmp_inode; + struct dentry *tmp_dentry; + + /* get filename and len into qstring */ + /* get dentry */ + /* decide whether to create and populate ionde */ + if((direntry == NULL) || (file == NULL)) + return -EINVAL; + + pCifsF = file->private_data; + + if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) + return -ENOENT; + + if(file->f_dentry == NULL) + return -ENOENT; + + cifs_sb = CIFS_SB(file->f_dentry->d_sb); + + qstring.name = scratch_buf; + rc = cifs_get_name_from_search_buf(&qstring,pfindEntry, + pCifsF->srch_inf.info_level, + pCifsF->srch_inf.unicode,cifs_sb, + &inum /* returned */); + + if(rc) + return rc; + + rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry); + if((tmp_inode == NULL) || (tmp_dentry == NULL)) + return -ENOMEM; + + if(rc) { + /* inode created, we need to hash it with right inode number */ + if(inum != 0) { + /* BB fixme - hash the 2 32 quantities bits together if necessary BB */ + tmp_inode->i_ino = inum; + } + insert_inode_hash(tmp_inode); + } + + if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) { + unix_fill_in_inode(tmp_inode,(FILE_UNIX_INFO *)pfindEntry,&obj_type); + } else { + fill_in_inode(tmp_inode,(FILE_DIRECTORY_INFO *)pfindEntry,&obj_type); + } + + rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,tmp_inode->i_ino,obj_type); + if(rc) { + cFYI(1,("filldir rc = %d",rc)); + } + + dput(tmp_dentry); + return rc; +} + +static int cifs_save_resume_key(const char *current_entry, + struct cifsFileInfo *cifsFile) +{ + int rc = 0; + unsigned int len = 0; + __u16 level; + char * filename; + + if((cifsFile == NULL) || (current_entry == NULL)) + return -EINVAL; + + level = cifsFile->srch_inf.info_level; + + if(level == SMB_FIND_FILE_UNIX) { + FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; + + filename = &pFindData->FileName[0]; + if(cifsFile->srch_inf.unicode) { + len = cifs_unicode_bytelen(filename); + } else { + /* BB should we make this strnlen of PATH_MAX? */ + len = strnlen(filename, PATH_MAX); + } + cifsFile->srch_inf.resume_key = pFindData->ResumeKey; + } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) { + FILE_DIRECTORY_INFO * pFindData = + (FILE_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + cifsFile->srch_inf.resume_key = pFindData->FileIndex; + } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { + FILE_FULL_DIRECTORY_INFO * pFindData = + (FILE_FULL_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + cifsFile->srch_inf.resume_key = pFindData->FileIndex; + } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { + SEARCH_ID_FULL_DIR_INFO * pFindData = + (SEARCH_ID_FULL_DIR_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + cifsFile->srch_inf.resume_key = pFindData->FileIndex; + } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { + FILE_BOTH_DIRECTORY_INFO * pFindData = + (FILE_BOTH_DIRECTORY_INFO *)current_entry; + filename = &pFindData->FileName[0]; + len = le32_to_cpu(pFindData->FileNameLength); + cifsFile->srch_inf.resume_key = pFindData->FileIndex; + } else { + cFYI(1,("Unknown findfirst level %d",level)); + return -EINVAL; + } + cifsFile->srch_inf.resume_name_len = len; + cifsFile->srch_inf.presume_name = filename; + return rc; +} + +int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) +{ + int rc = 0; + int xid,i; + struct cifs_sb_info *cifs_sb; + struct cifsTconInfo *pTcon; + struct cifsFileInfo *cifsFile = NULL; + char * current_entry; + int num_to_fill = 0; + char * tmp_buf = NULL; + char * end_of_smb; + + xid = GetXid(); + + if(file->f_dentry == NULL) { + FreeXid(xid); + return -EIO; + } +/* dump_cifs_file_struct(file, "Begin rdir "); */ + + cifs_sb = CIFS_SB(file->f_dentry->d_sb); + pTcon = cifs_sb->tcon; + if(pTcon == NULL) + return -EINVAL; + +/* cFYI(1,("readdir2 pos: %lld",file->f_pos)); */ + + switch ((int) file->f_pos) { + case 0: + /*if (filldir(direntry, ".", 1, file->f_pos, + file->f_dentry->d_inode->i_ino, DT_DIR) < 0) { + cERROR(1, ("Filldir for current dir failed ")); + rc = -ENOMEM; + break; + } + file->f_pos++; */ + case 1: + /* if (filldir(direntry, "..", 2, file->f_pos, + file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { + cERROR(1, ("Filldir for parent dir failed ")); + rc = -ENOMEM; + break; + } + file->f_pos++; */ + case 2: + /* 1) If search is active, + is in current search buffer? + if it before then restart search + if after then keep searching till find it */ + + if(file->private_data == NULL) { + rc = initiate_cifs_search(xid,file); + cFYI(1,("initiate cifs search rc %d",rc)); + if(rc) { + FreeXid(xid); + return rc; + } + } + default: + if(file->private_data == NULL) { + rc = -EINVAL; + FreeXid(xid); + return rc; + } + cifsFile = file->private_data; + if (cifsFile->srch_inf.endOfSearch) { + if(cifsFile->srch_inf.emptyDir) { + cFYI(1, ("End of search, empty dir")); + rc = 0; + break; + } + } /* else { + cifsFile->invalidHandle = TRUE; + CIFSFindClose(xid, pTcon, cifsFile->netfid); + } + kfree(cifsFile->search_resume_name); + cifsFile->search_resume_name = NULL; */ + + /* BB account for . and .. in f_pos as special case */ + /* dump_cifs_file_struct(file, "rdir after default ");*/ + + rc = find_cifs_entry(xid,pTcon, file, + ¤t_entry,&num_to_fill); + if(rc) { + cFYI(1,("fce error %d",rc)); + goto rddir2_exit; + } else if (current_entry != NULL) { + cFYI(1,("entry %lld found",file->f_pos)); + } else { + cFYI(1,("could not find entry")); + goto rddir2_exit; + } + cFYI(1,("loop through %d times filling dir for net buf %p", + num_to_fill,cifsFile->srch_inf.ntwrk_buf_start)); + end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + + smbCalcSize((struct smb_hdr *) + cifsFile->srch_inf.ntwrk_buf_start); + tmp_buf = kmalloc(NAME_MAX+1,GFP_KERNEL); + for(i=0;(i<num_to_fill) && (rc == 0);i++) { + if(current_entry == NULL) { + /* evaluate whether this case is an error */ + cERROR(1,("past end of SMB num to fill %d i %d", + num_to_fill, i)); + break; + } + + /* BB FIXME - need to enable the below code BB */ + + /* if((!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) || + (cifsFile->srch_inf.info_level != + something that supports server inodes)) { + create dentry + create inode + fill in inode new_inode (getting local i_ino) + } + also create local inode for performance reasons (so we + have a cache of inode metadata) unless this new mount + parm says otherwise */ + + rc = cifs_filldir(current_entry, file, + filldir, direntry,tmp_buf); + file->f_pos++; + if(file->f_pos == cifsFile->srch_inf.index_of_last_entry) { + cFYI(1,("last entry in buf at pos %lld %s", + file->f_pos,tmp_buf)); /* BB removeme BB */ + cifs_save_resume_key(current_entry,cifsFile); + break; + } else + current_entry = nxt_dir_entry(current_entry,end_of_smb); + } + kfree(tmp_buf); + break; + } /* end switch */ + +rddir2_exit: + /* dump_cifs_file_struct(file, "end rdir "); */ + FreeXid(xid); + return rc; +} |
