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[CIFS] Add support for readdir to legacy servers
Fixes oops to OS/2 on ls and removes redundant NTCreateX calls to servers which do not support NT SMBs. Key operations to OS/2 work. Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
a8ee03441f
commit
5bafd76593
@ -2,6 +2,10 @@ Version 1.44
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------------
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Rewritten sessionsetup support, including support for legacy SMB
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session setup needed for OS/2 and older servers such as Windows 95 and 98.
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Fix oops on ls to OS/2 servers. Add support for level 1 FindFirst
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so we can do search (ls etc.) to OS/2. Do not send NTCreateX
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or recent levels of FindFirst unless server says it supports NT SMBs
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(instead use legacy equivalents from LANMAN dialect).
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Version 1.43
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------------
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@ -1374,6 +1374,9 @@ struct smb_t2_rsp {
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#define SMB_FILE_MAXIMUM_INFO 0x40d
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/* Find File infolevels */
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#define SMB_FIND_FILE_INFO_STANDARD 0x001
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#define SMB_FIND_FILE_QUERY_EA_SIZE 0x002
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#define SMB_FIND_FILE_QUERY_EAS_FROM_LIST 0x003
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#define SMB_FIND_FILE_DIRECTORY_INFO 0x101
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#define SMB_FIND_FILE_FULL_DIRECTORY_INFO 0x102
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#define SMB_FIND_FILE_NAMES_INFO 0x103
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@ -1998,7 +2001,8 @@ typedef struct {
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struct file_allocation_info {
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__le64 AllocationSize; /* Note old Samba srvr rounds this up too much */
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} __attribute__((packed)); /* size used on disk, level 0x103 for set, 0x105 for query */
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} __attribute__((packed)); /* size used on disk, for level 0x103 for set,
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0x105 for query */
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struct file_end_of_file_info {
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__le64 FileSize; /* offset to end of file */
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@ -2105,7 +2109,7 @@ typedef struct {
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__le32 ExtFileAttributes;
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__le32 FileNameLength;
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char FileName[1];
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} __attribute__((packed)) FILE_DIRECTORY_INFO; /* level 0x101 FF response data area */
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} __attribute__((packed)) FILE_DIRECTORY_INFO; /* level 0x101 FF resp data */
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typedef struct {
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__le32 NextEntryOffset;
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@ -2120,7 +2124,7 @@ typedef struct {
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__le32 FileNameLength;
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__le32 EaSize; /* length of the xattrs */
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char FileName[1];
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} __attribute__((packed)) FILE_FULL_DIRECTORY_INFO; /* level 0x102 FF response data area */
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} __attribute__((packed)) FILE_FULL_DIRECTORY_INFO; /* level 0x102 rsp data */
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typedef struct {
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__le32 NextEntryOffset;
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@ -2137,7 +2141,7 @@ typedef struct {
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__le32 Reserved;
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__u64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
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char FileName[1];
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} __attribute__((packed)) SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF response data area */
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} __attribute__((packed)) SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF rsp data */
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typedef struct {
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__le32 NextEntryOffset;
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@ -2155,7 +2159,22 @@ typedef struct {
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__u8 Reserved;
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__u8 ShortName[12];
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char FileName[1];
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} __attribute__((packed)) FILE_BOTH_DIRECTORY_INFO; /* level 0x104 FF response data area */
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} __attribute__((packed)) FILE_BOTH_DIRECTORY_INFO; /* level 0x104 FFrsp data */
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typedef struct {
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__u32 ResumeKey;
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__le16 CreationDate; /* SMB Date */
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__le16 CreationTime; /* SMB Time */
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__le16 LastAccessDate;
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__le16 LastAccessTime;
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__le16 LastWriteDate;
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__le16 LastWriteTime;
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__le32 DataSize; /* File Size (EOF) */
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__le32 AllocationSize;
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__le16 Attributes; /* verify not u32 */
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__u8 FileNameLength;
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char FileName[1];
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} __attribute__((packed)) FIND_FILE_STANDARD_INFO; /* level 0x1 FF resp data */
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struct win_dev {
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@ -178,11 +178,14 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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FreeXid(xid);
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return -ENOMEM;
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}
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if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
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desiredAccess, CREATE_NOT_DIR,
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&fileHandle, &oplock, buf, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
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else
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rc = -EIO; /* no NT SMB support fall into legacy open below */
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if(rc == -EIO) {
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/* old server, retry the open legacy style */
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rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
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@ -369,6 +372,10 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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/* BB FIXME - add handling for backlevel servers
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which need legacy open and check for all
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calls to SMBOpen for fallback to
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SMBLeagcyOpen */
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if(!rc) {
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/* BB Do not bother to decode buf since no
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local inode yet to put timestamps in,
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@ -260,10 +260,15 @@ int cifs_open(struct inode *inode, struct file *file)
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rc = -ENOMEM;
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goto out;
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}
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, desiredAccess,
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CREATE_NOT_DIR, &netfid, &oplock, buf,
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if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
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rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
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desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf,
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cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
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& CIFS_MOUNT_MAP_SPECIAL_CHR);
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else
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rc = -EIO; /* no NT SMB support fall into legacy open below */
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if (rc == -EIO) {
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/* Old server, try legacy style OpenX */
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rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
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@ -109,32 +109,52 @@ static int construct_dentry(struct qstr *qstring, struct file *file,
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return rc;
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}
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static void fill_in_inode(struct inode *tmp_inode,
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FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode)
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static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
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char * buf, int *pobject_type, int isNewInode)
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{
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loff_t local_size;
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struct timespec local_mtime;
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struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
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struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
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__u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
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__u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
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__u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
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cifsInfo->cifsAttrs = attr;
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cifsInfo->time = jiffies;
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__u32 attr;
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__u64 allocation_size;
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__u64 end_of_file;
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/* save mtime and size */
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local_mtime = tmp_inode->i_mtime;
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local_size = tmp_inode->i_size;
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/* Linux can not store file creation time unfortunately so ignore it */
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if(new_buf_type) {
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FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
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attr = le32_to_cpu(pfindData->ExtFileAttributes);
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allocation_size = le64_to_cpu(pfindData->AllocationSize);
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end_of_file = le64_to_cpu(pfindData->EndOfFile);
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tmp_inode->i_atime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
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tmp_inode->i_mtime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
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tmp_inode->i_ctime =
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cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
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} else { /* legacy, OS2 and DOS style */
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FIND_FILE_STANDARD_INFO * pfindData =
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(FIND_FILE_STANDARD_INFO *)buf;
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attr = le16_to_cpu(pfindData->Attributes);
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allocation_size = le32_to_cpu(pfindData->AllocationSize);
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end_of_file = le32_to_cpu(pfindData->DataSize);
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tmp_inode->i_atime = CURRENT_TIME;
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/* tmp_inode->i_mtime = BB FIXME - add dos time handling
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tmp_inode->i_ctime = 0; BB FIXME */
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}
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/* Linux can not store file creation time unfortunately so ignore it */
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cifsInfo->cifsAttrs = attr;
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cifsInfo->time = jiffies;
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/* treat dos attribute of read-only as read-only mode bit e.g. 555? */
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/* 2767 perms - indicate mandatory locking */
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/* BB fill in uid and gid here? with help from winbind?
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@ -421,6 +441,9 @@ ffirst_retry:
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/* test for Unix extensions */
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if (pTcon->ses->capabilities & CAP_UNIX) {
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
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} else if ((pTcon->ses->capabilities &
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(CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
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} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
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cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
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} else /* not srvinos - BB fixme add check for backlevel? */ {
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@ -456,11 +479,18 @@ static int cifs_unicode_bytelen(char *str)
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return len << 1;
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}
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static char *nxt_dir_entry(char *old_entry, char *end_of_smb)
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static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
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{
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char * new_entry;
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FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
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if(level == SMB_FIND_FILE_INFO_STANDARD) {
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FIND_FILE_STANDARD_INFO * pfData;
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pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
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new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
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pfData->FileNameLength;
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} else
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new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
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cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
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/* validate that new_entry is not past end of SMB */
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@ -469,7 +499,10 @@ static char *nxt_dir_entry(char *old_entry, char *end_of_smb)
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("search entry %p began after end of SMB %p old entry %p",
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new_entry, end_of_smb, old_entry));
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return NULL;
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} else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) {
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} else if(((level == SMB_FIND_FILE_INFO_STANDARD) &&
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(new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) ||
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((level != SMB_FIND_FILE_INFO_STANDARD) &&
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(new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
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cERROR(1,("search entry %p extends after end of SMB %p",
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new_entry, end_of_smb));
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return NULL;
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@ -487,7 +520,7 @@ static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
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char * filename = NULL;
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int len = 0;
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if(cfile->srch_inf.info_level == 0x202) {
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if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
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FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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if(cfile->srch_inf.unicode) {
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@ -496,26 +529,34 @@ static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
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/* BB should we make this strnlen of PATH_MAX? */
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len = strnlen(filename, 5);
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}
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} else if(cfile->srch_inf.info_level == 0x101) {
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} else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
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FILE_DIRECTORY_INFO * pFindData =
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(FILE_DIRECTORY_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else if(cfile->srch_inf.info_level == 0x102) {
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} else if(cfile->srch_inf.info_level ==
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SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
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FILE_FULL_DIRECTORY_INFO * pFindData =
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(FILE_FULL_DIRECTORY_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else if(cfile->srch_inf.info_level == 0x105) {
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} else if(cfile->srch_inf.info_level ==
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SMB_FIND_FILE_ID_FULL_DIR_INFO) {
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SEARCH_ID_FULL_DIR_INFO * pFindData =
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(SEARCH_ID_FULL_DIR_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else if(cfile->srch_inf.info_level == 0x104) {
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} else if(cfile->srch_inf.info_level ==
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SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
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FILE_BOTH_DIRECTORY_INFO * pFindData =
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(FILE_BOTH_DIRECTORY_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
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FIND_FILE_STANDARD_INFO * pFindData =
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(FIND_FILE_STANDARD_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else {
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cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
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}
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@ -652,9 +693,11 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
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- cifsFile->srch_inf.entries_in_buffer;
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pos_in_buf = index_to_find - first_entry_in_buffer;
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cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
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for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
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/* go entry by entry figuring out which is first */
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current_entry = nxt_dir_entry(current_entry,end_of_smb);
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current_entry = nxt_dir_entry(current_entry,end_of_smb,
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cifsFile->srch_inf.info_level);
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}
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if((current_entry == NULL) && (i < pos_in_buf)) {
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/* BB fixme - check if we should flag this error */
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@ -681,7 +724,7 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
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/* inode num, inode type and filename returned */
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static int cifs_get_name_from_search_buf(struct qstr *pqst,
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char *current_entry, __u16 level, unsigned int unicode,
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struct cifs_sb_info * cifs_sb, ino_t *pinum)
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struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum)
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{
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int rc = 0;
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unsigned int len = 0;
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@ -725,10 +768,22 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
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(FILE_BOTH_DIRECTORY_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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len = le32_to_cpu(pFindData->FileNameLength);
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} else if(level == SMB_FIND_FILE_INFO_STANDARD) {
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FIND_FILE_STANDARD_INFO * pFindData =
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(FIND_FILE_STANDARD_INFO *)current_entry;
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filename = &pFindData->FileName[0];
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/* one byte length, no name conversion */
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len = (unsigned int)pFindData->FileNameLength;
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} else {
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cFYI(1,("Unknown findfirst level %d",level));
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return -EINVAL;
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}
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if(len > max_len) {
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cERROR(1,("bad search response length %d past smb end", len));
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return -EINVAL;
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}
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if(unicode) {
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/* BB fixme - test with long names */
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/* Note converted filename can be longer than in unicode */
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@ -748,7 +803,7 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
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}
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static int cifs_filldir(char *pfindEntry, struct file *file,
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filldir_t filldir, void *direntry, char *scratch_buf)
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filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
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{
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int rc = 0;
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struct qstr qstring;
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@ -784,6 +839,7 @@ static int cifs_filldir(char *pfindEntry, struct file *file,
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rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
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pCifsF->srch_inf.info_level,
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pCifsF->srch_inf.unicode,cifs_sb,
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max_len,
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&inum /* returned */);
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if(rc)
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@ -805,13 +861,16 @@ static int cifs_filldir(char *pfindEntry, struct file *file,
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/* we pass in rc below, indicating whether it is a new inode,
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so we can figure out whether to invalidate the inode cached
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data if the file has changed */
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if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
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if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
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unix_fill_in_inode(tmp_inode,
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(FILE_UNIX_INFO *)pfindEntry,&obj_type, rc);
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} else {
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fill_in_inode(tmp_inode,
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(FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc);
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}
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(FILE_UNIX_INFO *)pfindEntry,
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&obj_type, rc);
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else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
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fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
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pfindEntry, &obj_type, rc);
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else
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fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
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rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
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tmp_inode->i_ino,obj_type);
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@ -871,6 +930,12 @@ static int cifs_save_resume_key(const char *current_entry,
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||||
filename = &pFindData->FileName[0];
|
||||
len = le32_to_cpu(pFindData->FileNameLength);
|
||||
cifsFile->srch_inf.resume_key = pFindData->FileIndex;
|
||||
} else if(level == SMB_FIND_FILE_INFO_STANDARD) {
|
||||
FIND_FILE_STANDARD_INFO * pFindData =
|
||||
(FIND_FILE_STANDARD_INFO *)current_entry;
|
||||
filename = &pFindData->FileName[0];
|
||||
/* one byte length, no name conversion */
|
||||
len = (unsigned int)pFindData->FileNameLength;
|
||||
} else {
|
||||
cFYI(1,("Unknown findfirst level %d",level));
|
||||
return -EINVAL;
|
||||
@ -891,6 +956,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
||||
int num_to_fill = 0;
|
||||
char * tmp_buf = NULL;
|
||||
char * end_of_smb;
|
||||
int max_len;
|
||||
|
||||
xid = GetXid();
|
||||
|
||||
@ -967,9 +1033,10 @@ 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));
|
||||
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
|
||||
smbCalcSize((struct smb_hdr *)
|
||||
max_len = smbCalcSize((struct smb_hdr *)
|
||||
cifsFile->srch_inf.ntwrk_buf_start);
|
||||
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
|
||||
|
||||
/* To be safe - for UCS to UTF-8 with strings loaded
|
||||
with the rare long characters alloc more to account for
|
||||
such multibyte target UTF-8 characters. cifs_unicode.c,
|
||||
@ -985,7 +1052,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
||||
/* if buggy server returns . and .. late do
|
||||
we want to check for that here? */
|
||||
rc = cifs_filldir(current_entry, file,
|
||||
filldir, direntry,tmp_buf);
|
||||
filldir, direntry, tmp_buf, max_len);
|
||||
file->f_pos++;
|
||||
if(file->f_pos ==
|
||||
cifsFile->srch_inf.index_of_last_entry) {
|
||||
@ -994,8 +1061,9 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
|
||||
cifs_save_resume_key(current_entry,cifsFile);
|
||||
break;
|
||||
} else
|
||||
current_entry = nxt_dir_entry(current_entry,
|
||||
end_of_smb);
|
||||
current_entry =
|
||||
nxt_dir_entry(current_entry, end_of_smb,
|
||||
cifsFile->srch_inf.info_level);
|
||||
}
|
||||
kfree(tmp_buf);
|
||||
break;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user