*
* Directory search handling
*
- * Copyright (C) International Business Machines Corp., 2004
+ * Copyright (C) International Business Machines Corp., 2004, 2007
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
+#include <linux/pagemap.h>
#include <linux/stat.h>
-#include <linux/smp_lock.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.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)
+#ifdef CONFIG_CIFS_DEBUG2
+static void dump_cifs_file_struct(struct file *file, char *label)
{
struct cifsFileInfo * cf;
- if(file) {
+ if (file) {
cf = file->private_data;
- if(cf == NULL) {
+ if (cf == NULL) {
cFYI(1,("empty cifs private file data"));
return;
}
- if(cf->invalidHandle) {
+ if (cf->invalidHandle) {
cFYI(1,("invalid handle"));
}
- if(cf->srch_inf.endOfSearch) {
+ if (cf->srch_inf.endOfSearch) {
cFYI(1,("end of search"));
}
- if(cf->srch_inf.emptyDir) {
+ if (cf->srch_inf.emptyDir) {
cFYI(1,("empty dir"));
}
}
-} */
+}
+#endif /* DEBUG2 */
/* 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 */
struct cifsTconInfo *pTcon;
int rc = 0;
- cFYI(1, ("For %s ", qstring->name));
- cifs_sb = CIFS_SB(file->f_dentry->d_sb);
+ cFYI(1, ("For %s", qstring->name));
+ cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
pTcon = cifs_sb->tcon;
qstring->hash = full_name_hash(qstring->name, qstring->len);
- tmp_dentry = d_lookup(file->f_dentry, qstring);
+ tmp_dentry = d_lookup(file->f_path.dentry, qstring);
if (tmp_dentry) {
- cFYI(0, (" existing dentry with inode 0x%p", tmp_dentry->d_inode));
+ 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)
+ if (*ptmp_inode == NULL) {
+ *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
+ if (*ptmp_inode == NULL)
return rc;
rc = 1;
- d_instantiate(tmp_dentry, *ptmp_inode);
}
+ if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
+ (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
} else {
- tmp_dentry = d_alloc(file->f_dentry, qstring);
- if(tmp_dentry == NULL) {
+ tmp_dentry = d_alloc(file->f_path.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)
+ *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
+ if (pTcon->nocase)
+ tmp_dentry->d_op = &cifs_ci_dentry_ops;
+ else
+ 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);
+ if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
+ (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
+ rc = 2;
}
tmp_dentry->d_time = jiffies;
return rc;
}
-static void fill_in_inode(struct inode *tmp_inode,
- FILE_DIRECTORY_INFO *pfindData, int *pobject_type)
+static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode)
+{
+ if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
+ inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
+ inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
+ inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
+ }
+ return;
+}
+
+
+static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
+ char * buf, int *pobject_type, int isNewInode)
{
+ loff_t local_size;
+ struct timespec local_mtime;
+
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);
+ __u32 attr;
+ __u64 allocation_size;
+ __u64 end_of_file;
+
+ /* save mtime and size */
+ local_mtime = tmp_inode->i_mtime;
+ local_size = tmp_inode->i_size;
+
+ if (new_buf_type) {
+ FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
+
+ attr = le32_to_cpu(pfindData->ExtFileAttributes);
+ allocation_size = le64_to_cpu(pfindData->AllocationSize);
+ end_of_file = le64_to_cpu(pfindData->EndOfFile);
+ 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));
+ } else { /* legacy, OS2 and DOS style */
+/* struct timespec ts;*/
+ FIND_FILE_STANDARD_INFO * pfindData =
+ (FIND_FILE_STANDARD_INFO *)buf;
+
+ tmp_inode->i_mtime = cnvrtDosUnixTm(
+ le16_to_cpu(pfindData->LastWriteDate),
+ le16_to_cpu(pfindData->LastWriteTime));
+ tmp_inode->i_atime = cnvrtDosUnixTm(
+ le16_to_cpu(pfindData->LastAccessDate),
+ le16_to_cpu(pfindData->LastAccessTime));
+ tmp_inode->i_ctime = cnvrtDosUnixTm(
+ le16_to_cpu(pfindData->LastWriteDate),
+ le16_to_cpu(pfindData->LastWriteTime));
+ AdjustForTZ(cifs_sb->tcon, tmp_inode);
+ attr = le16_to_cpu(pfindData->Attributes);
+ allocation_size = le32_to_cpu(pfindData->AllocationSize);
+ end_of_file = le32_to_cpu(pfindData->DataSize);
+ }
+
+ /* Linux can not store file creation time unfortunately so ignore it */
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?
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;
+ } else {
+ /* mask off the type bits since it gets set
+ below and we do not want to get two type
+ bits set */
+ tmp_inode->i_mode &= ~S_IFMT;
}
- 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) {
+ if (atomic_read(&cifsInfo->inUse) == 0) {
tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
}
tmp_inode->i_mode |= S_IFDIR;
+ } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+ (attr & ATTR_SYSTEM)) {
+ if (end_of_file == 0) {
+ *pobject_type = DT_FIFO;
+ tmp_inode->i_mode |= S_IFIFO;
+ } else {
+ /* rather than get the type here, we mark the
+ inode as needing revalidate and get the real type
+ (blk vs chr vs. symlink) later ie in lookup */
+ *pobject_type = DT_REG;
+ tmp_inode->i_mode |= S_IFREG;
+ cifsInfo->time = 0;
+ }
/* 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_IFREG;
if (attr & ATTR_READONLY)
tmp_inode->i_mode &= ~(S_IWUGO);
+ else if ((tmp_inode->i_mode & S_IWUGO) == 0)
+ /* the ATTR_READONLY flag may have been changed on */
+ /* server -- set any w bits allowed by mnt_file_mode */
+ tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
} /* 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 */
atomic_set(&cifsInfo->inUse, 1);
}
- if (is_size_safe_to_change(cifsInfo)) {
+ spin_lock(&tmp_inode->i_lock);
+ if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/* 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);
/* for this calculation, even though the reported blocksize is larger */
tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
}
+ spin_unlock(&tmp_inode->i_lock);
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));
+ cFYI(1, ("File Size %ld and blocks %llu",
+ (unsigned long)tmp_inode->i_size,
+ (unsigned long long)tmp_inode->i_blocks));
if (S_ISREG(tmp_inode->i_mode)) {
- cFYI(1, (" File inode "));
+ 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;
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
+ else
+ tmp_inode->i_fop = &cifs_file_direct_ops;
+
+ } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop = &cifs_file_nobrl_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
- tmp_inode->i_data.a_ops = &cifs_addr_ops;
+
+ if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
+ (cifs_sb->tcon->ses->server->maxBuf <
+ PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
+ tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
+ else
+ tmp_inode->i_data.a_ops = &cifs_addr_ops;
+
+ if (isNewInode)
+ return; /* No sense invalidating pages for new inode
+ since have not started caching readahead file
+ data yet */
+
+ if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
+ (local_size == tmp_inode->i_size)) {
+ cFYI(1, ("inode exists but unchanged"));
+ } else {
+ /* file may have changed on server */
+ cFYI(1, ("invalidate inode, readdir detected change"));
+ invalidate_remote_inode(tmp_inode);
+ }
} else if (S_ISDIR(tmp_inode->i_mode)) {
- cFYI(1, (" Directory inode"));
+ 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 "));
+ cFYI(1, ("Symbolic Link inode"));
tmp_inode->i_op = &cifs_symlink_inode_ops;
} else {
- cFYI(1, (" Init special inode "));
+ 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)
+ FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
{
+ loff_t local_size;
+ struct timespec local_mtime;
+
struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
cifsInfo->time = jiffies;
atomic_inc(&cifsInfo->inUse);
+ /* save mtime and size */
+ local_mtime = tmp_inode->i_mtime;
+ local_size = tmp_inode->i_size;
+
tmp_inode->i_atime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
tmp_inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
+ /* since we set the inode type below we need to mask off type
+ to avoid strange results if bits above were corrupt */
+ tmp_inode->i_mode &= ~S_IFMT;
if (type == UNIX_FILE) {
*pobject_type = DT_REG;
tmp_inode->i_mode |= S_IFREG;
} else if (type == UNIX_SOCKET) {
*pobject_type = DT_SOCK;
tmp_inode->i_mode |= S_IFSOCK;
+ } else {
+ /* safest to just call it a file */
+ *pobject_type = DT_REG;
+ tmp_inode->i_mode |= S_IFREG;
+ cFYI(1,("unknown inode type %d",type));
}
- tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
- tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
+ tmp_inode->i_uid = cifs_sb->mnt_uid;
+ else
+ tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
+ tmp_inode->i_gid = cifs_sb->mnt_gid;
+ else
+ 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)) {
+ spin_lock(&tmp_inode->i_lock);
+ if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/* 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);
+ 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;
}
+ spin_unlock(&tmp_inode->i_lock);
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;
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
+ else
+ tmp_inode->i_fop = &cifs_file_direct_ops;
+ } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ tmp_inode->i_fop = &cifs_file_nobrl_ops;
else
tmp_inode->i_fop = &cifs_file_ops;
- tmp_inode->i_data.a_ops = &cifs_addr_ops;
+
+ if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
+ (cifs_sb->tcon->ses->server->maxBuf <
+ PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
+ tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
+ else
+ tmp_inode->i_data.a_ops = &cifs_addr_ops;
+
+ if (isNewInode)
+ return; /* No sense invalidating pages for new inode since we
+ have not started caching readahead file data yet */
+
+ if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
+ (local_size == tmp_inode->i_size)) {
+ cFYI(1, ("inode exists but unchanged"));
+ } else {
+ /* file may have changed on server */
+ cFYI(1, ("invalidate inode, readdir detected change"));
+ invalidate_remote_inode(tmp_inode);
+ }
} else if (S_ISDIR(tmp_inode->i_mode)) {
cFYI(1, ("Directory inode"));
tmp_inode->i_op = &cifs_dir_inode_ops;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
- if(file->private_data == NULL) {
+ if (file->private_data == NULL) {
file->private_data =
- kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
+ kzalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
}
- if(file->private_data == NULL) {
+ 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)
+ cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
+ if (cifs_sb == NULL)
return -EINVAL;
pTcon = cifs_sb->tcon;
- if(pTcon == NULL)
+ 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);
+ full_path = build_path_from_dentry(file->f_path.dentry);
- if(full_path == NULL) {
+ if (full_path == NULL) {
return -ENOMEM;
}
- cFYI(1, ("Full path: %s start at: %lld ", full_path, file->f_pos));
+ cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
ffirst_retry:
/* test for Unix extensions */
if (pTcon->ses->capabilities & CAP_UNIX) {
- cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
+ cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
+ } else if ((pTcon->ses->capabilities &
+ (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
+ cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
} 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)
+ rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
+ &cifsFile->netfid, &cifsFile->srch_inf,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
+ if (rc == 0)
cifsFile->invalidHandle = FALSE;
- if((rc == -EOPNOTSUPP) &&
+ if ((rc == -EOPNOTSUPP) &&
(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
goto ffirst_retry;
__le16 * ustr = (__le16 *)str;
for(len=0;len <= PATH_MAX;len++) {
- if(ustr[len] == 0)
+ 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)
+static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
{
char * new_entry;
FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
- new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
+ if (level == SMB_FIND_FILE_INFO_STANDARD) {
+ FIND_FILE_STANDARD_INFO * pfData;
+ pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
+
+ new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
+ pfData->FileNameLength;
+ } else
+ 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));
+ if (new_entry >= end_of_smb) {
+ cERROR(1,
+ ("search entry %p began after end of SMB %p old entry %p",
+ new_entry, end_of_smb, old_entry));
return NULL;
- } else
+ } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
+ (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) ||
+ ((level != SMB_FIND_FILE_INFO_STANDARD) &&
+ (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
+ cERROR(1,("search entry %p extends after end of SMB %p",
+ new_entry, end_of_smb));
+ return NULL;
+ } else
return new_entry;
}
char * filename = NULL;
int len = 0;
- if(cfile->srch_inf.info_level == 0x202) {
+ if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
filename = &pFindData->FileName[0];
- if(cfile->srch_inf.unicode) {
+ 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) {
+ } else if (cfile->srch_inf.info_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(cfile->srch_inf.info_level == 0x102) {
+ } else if (cfile->srch_inf.info_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(cfile->srch_inf.info_level == 0x105) {
+ } else if (cfile->srch_inf.info_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);
- } else if(cfile->srch_inf.info_level == 0x104) {
+ } else if (cfile->srch_inf.info_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 if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
+ FIND_FILE_STANDARD_INFO * pFindData =
+ (FIND_FILE_STANDARD_INFO *)current_entry;
+ filename = &pFindData->FileName[0];
+ len = pFindData->FileNameLength;
} else {
cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
}
- if(filename) {
- if(cfile->srch_inf.unicode) {
+ if (filename) {
+ if (cfile->srch_inf.unicode) {
__le16 *ufilename = (__le16 *)filename;
- if(len == 2) {
+ if (len == 2) {
/* check for . */
- if(ufilename[0] == UNICODE_DOT)
+ if (ufilename[0] == UNICODE_DOT)
rc = 1;
- } else if(len == 4) {
+ } else if (len == 4) {
/* check for .. */
- if((ufilename[0] == UNICODE_DOT)
+ if ((ufilename[0] == UNICODE_DOT)
&&(ufilename[1] == UNICODE_DOT))
rc = 2;
}
} else /* ASCII */ {
- if(len == 1) {
- if(filename[0] == '.')
+ if (len == 1) {
+ if (filename[0] == '.')
rc = 1;
- } else if(len == 2) {
- if((filename[0] == '.') && (filename[1] == '.'))
+ } else if (len == 2) {
+ if((filename[0] == '.') && (filename[1] == '.'))
rc = 2;
}
}
return rc;
}
+/* Check if directory that we are searching has changed so we can decide
+ whether we can use the cached search results from the previous search */
+static int is_dir_changed(struct file * file)
+{
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
+
+ if (cifsInfo->time == 0)
+ return 1; /* directory was changed, perhaps due to unlink */
+ else
+ return 0;
+
+}
+
/* 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
struct cifsFileInfo * cifsFile = file->private_data;
/* check if index in the buffer */
- if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL))
+ 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) {
+
+ /* 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 */
+
+#ifdef CONFIG_CIFS_DEBUG2
+ dump_cifs_file_struct(file, "In fce ");
+#endif
+ if (((index_to_find < cifsFile->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"));
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) {
+ 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);
+ if (cifsFile->srch_inf.smallBuf)
+ cifs_small_buf_release(cifsFile->srch_inf.
+ ntwrk_buf_start);
+ else
+ cifs_buf_release(cifsFile->srch_inf.
+ ntwrk_buf_start);
}
rc = initiate_cifs_search(xid,file);
- if(rc) {
+ 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)
+ rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
+ &cifsFile->srch_inf);
+ if (rc)
return -ENOENT;
}
- if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
+ 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 * 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 "); */
+
+ 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;
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;
+ cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
+
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);
+ /* go entry by entry figuring out which is first */
+ current_entry = nxt_dir_entry(current_entry,end_of_smb,
+ cifsFile->srch_inf.info_level);
}
if((current_entry == NULL) && (i < pos_in_buf)) {
/* BB fixme - check if we should flag this error */
}
if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
- cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
+ cFYI(1,("can not return entries 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)
+ struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum)
{
int rc = 0;
unsigned int len = 0;
(FILE_BOTH_DIRECTORY_INFO *)current_entry;
filename = &pFindData->FileName[0];
len = le32_to_cpu(pFindData->FileNameLength);
+ } 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;
}
+
+ if(len > max_len) {
+ cERROR(1,("bad search response length %d past smb end", len));
+ 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);
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
+ pqst->len = cifs_convertUCSpath((char *)pqst->name,
+ (__le16 *)filename, len/2, nlt);
+ else
+ pqst->len = cifs_strfromUCS_le((char *)pqst->name,
+ (__le16 *)filename,len/2,nlt);
} else {
pqst->name = filename;
pqst->len = len;
}
static int cifs_filldir(char *pfindEntry, struct file *file,
- filldir_t filldir, void *direntry, char *scratch_buf)
+ filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
{
int rc = 0;
struct qstr qstring;
if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
return -ENOENT;
- if(file->f_dentry == NULL)
- return -ENOENT;
+ rc = cifs_entry_is_dot(pfindEntry,pCifsF);
+ /* skip . and .. since we added them first */
+ if(rc != 0)
+ return 0;
- cifs_sb = CIFS_SB(file->f_dentry->d_sb);
+ cifs_sb = CIFS_SB(file->f_path.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,
+ max_len,
&inum /* returned */);
if(rc)
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);
+ /* we pass in rc below, indicating whether it is a new inode,
+ so we can figure out whether to invalidate the inode cached
+ data if the file has changed */
+ if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
+ unix_fill_in_inode(tmp_inode,
+ (FILE_UNIX_INFO *)pfindEntry,
+ &obj_type, rc);
+ else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
+ fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
+ pfindEntry, &obj_type, rc);
+ else
+ fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
+
+ if(rc) /* new inode - needs to be tied to dentry */ {
+ d_instantiate(tmp_dentry, tmp_inode);
+ if(rc == 2)
+ d_rehash(tmp_dentry);
}
- rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,tmp_inode->i_ino,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));
+ /* we can not return filldir errors to the caller
+ since they are "normal" when the stat blocksize
+ is too small - we return remapped error instead */
+ rc = -EOVERFLOW;
}
dput(tmp_dentry);
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;
+ cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
} else {
cFYI(1,("Unknown findfirst level %d",level));
return -EINVAL;
int num_to_fill = 0;
char * tmp_buf = NULL;
char * end_of_smb;
+ int max_len;
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);
+ cifs_sb = CIFS_SB(file->f_path.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 "));
+ if (filldir(direntry, ".", 1, file->f_pos,
+ file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
+ cERROR(1, ("Filldir for current dir failed"));
rc = -ENOMEM;
break;
}
- file->f_pos++; */
+ 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 "));
+ if (filldir(direntry, "..", 2, file->f_pos,
+ file->f_path.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:
+ file->f_pos++;
+ default:
/* 1) If search is active,
is in current search buffer?
if it before then restart search
return rc;
}
}
- default:
if(file->private_data == NULL) {
rc = -EINVAL;
FreeXid(xid);
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) {
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);
+ num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
+ 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,
+ which actually does the conversion, has the same limit */
+ tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
for(i=0;(i<num_to_fill) && (rc == 0);i++) {
if(current_entry == NULL) {
/* evaluate whether this case is an error */
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)
+ /* 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;
}
- 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) {
+ 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 */
+ file->f_pos,tmp_buf));
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;
} /* end switch */
rddir2_exit:
- /* dump_cifs_file_struct(file, "end rdir "); */
FreeXid(xid);
return rc;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff