summaryrefslogtreecommitdiffstats
path: root/fs/cifs/readdir.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/cifs/readdir.c
downloadop-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/cifs/readdir.c')
-rw-r--r--fs/cifs/readdir.c867
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,
+ &current_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;
+}
OpenPOWER on IntegriCloud