*
* vfs operations that deal with dentries
*
- * Copyright (C) International Business Machines Corp., 2002,2003
+ * Copyright (C) International Business Machines Corp., 2002,2005
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
build_path_from_dentry(struct dentry *direntry)
{
struct dentry *temp;
- int namelen = 0;
+ int namelen;
+ int pplen;
char *full_path;
+ char dirsep;
if(direntry == NULL)
return NULL; /* not much we can do if dentry is freed and
we need to reopen the file after it was closed implicitly
when the server crashed */
+ dirsep = CIFS_DIR_SEP(CIFS_SB(direntry->d_sb));
+ pplen = CIFS_SB(direntry->d_sb)->prepathlen;
cifs_bp_rename_retry:
+ namelen = pplen;
for (temp = direntry; !IS_ROOT(temp);) {
namelen += (1 + temp->d_name.len);
temp = temp->d_parent;
if(full_path == NULL)
return full_path;
full_path[namelen] = 0; /* trailing null */
-
for (temp = direntry; !IS_ROOT(temp);) {
namelen -= 1 + temp->d_name.len;
if (namelen < 0) {
break;
} else {
- full_path[namelen] = '\\';
+ full_path[namelen] = dirsep;
strncpy(full_path + namelen + 1, temp->d_name.name,
temp->d_name.len);
- cFYI(0, (" name: %s ", full_path + namelen));
+ cFYI(0, ("name: %s", full_path + namelen));
}
temp = temp->d_parent;
if(temp == NULL) {
return NULL;
}
}
- if (namelen != 0) {
+ if (namelen != pplen) {
cERROR(1,
- ("We did not end path lookup where we expected namelen is %d",
+ ("did not end path lookup where expected namelen is %d",
namelen));
- /* presumably this is only possible if we were racing with a rename
+ /* presumably this is only possible if racing with a rename
of one of the parent directories (we can not lock the dentries
above us to prevent this, but retrying should be harmless) */
kfree(full_path);
- namelen = 0;
goto cifs_bp_rename_retry;
}
-
+ /* DIR_SEP already set for byte 0 / vs \ but not for
+ subsequent slashes in prepath which currently must
+ be entered the right way - not sure if there is an alternative
+ since the '\' is a valid posix character so we can not switch
+ those safely to '/' if any are found in the middle of the prepath */
+ /* BB test paths to Windows with '/' in the midst of prepath */
+ strncpy(full_path,CIFS_SB(direntry->d_sb)->prepath,pplen);
return full_path;
}
-/* Note: caller must free return buffer */
-char *
-build_wildcard_path_from_dentry(struct dentry *direntry)
+/* char * build_wildcard_path_from_dentry(struct dentry *direntry)
{
- struct dentry *temp;
- int namelen = 0;
- char *full_path;
-
- if(direntry == NULL)
- return NULL; /* not much we can do if dentry is freed and
- we need to reopen the file after it was closed implicitly
- when the server crashed */
-
-cifs_bwp_rename_retry:
- for (temp = direntry; !IS_ROOT(temp);) {
- namelen += (1 + temp->d_name.len);
- temp = temp->d_parent;
- if(temp == NULL) {
- cERROR(1,("corrupt dentry"));
- return NULL;
- }
- }
-
- full_path = kmalloc(namelen+3, GFP_KERNEL);
if(full_path == NULL)
return full_path;
full_path[namelen] = '\\';
full_path[namelen+1] = '*';
- full_path[namelen+2] = 0; /* trailing null */
+ full_path[namelen+2] = 0;
+BB remove above eight lines BB */
- for (temp = direntry; !IS_ROOT(temp);) {
- namelen -= 1 + temp->d_name.len;
- if (namelen < 0) {
- break;
- } else {
- full_path[namelen] = '\\';
- strncpy(full_path + namelen + 1, temp->d_name.name,
- temp->d_name.len);
- cFYI(0, (" name: %s ", full_path + namelen));
- }
- temp = temp->d_parent;
- if(temp == NULL) {
- cERROR(1,("corrupt dentry"));
- kfree(full_path);
- return NULL;
- }
- }
- if (namelen != 0) {
- cERROR(1,
- ("We did not end path lookup where we expected namelen is %d",
- namelen));
- /* presumably this is only possible if we were racing with a rename
- of one of the parent directories (we can not lock the dentries
- above us to prevent this, but retrying should be harmless) */
- kfree(full_path);
- namelen = 0;
- goto cifs_bwp_rename_retry;
- }
-
- return full_path;
-}
-
-/* Inode operations in similar order to how they appear in the Linux file fs.h */
+/* Inode operations in similar order to how they appear in Linux file fs.h */
int
cifs_create(struct inode *inode, struct dentry *direntry, int mode,
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- down(&direntry->d_sb->s_vfs_rename_sem);
full_path = build_path_from_dentry(direntry);
- up(&direntry->d_sb->s_vfs_rename_sem);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
}
- if(nd) {
- if ((nd->intent.open.flags & O_ACCMODE) == O_RDONLY)
- desiredAccess = GENERIC_READ;
- else if ((nd->intent.open.flags & O_ACCMODE) == O_WRONLY) {
- desiredAccess = GENERIC_WRITE;
- write_only = TRUE;
- } else if ((nd->intent.open.flags & O_ACCMODE) == O_RDWR) {
- /* GENERIC_ALL is too much permission to request */
- /* can cause unnecessary access denied on create */
- /* desiredAccess = GENERIC_ALL; */
- desiredAccess = GENERIC_READ | GENERIC_WRITE;
+ if(nd && (nd->flags & LOOKUP_OPEN)) {
+ int oflags = nd->intent.open.flags;
+
+ desiredAccess = 0;
+ if (oflags & FMODE_READ)
+ desiredAccess |= GENERIC_READ;
+ if (oflags & FMODE_WRITE) {
+ desiredAccess |= GENERIC_WRITE;
+ if (!(oflags & FMODE_READ))
+ write_only = TRUE;
}
- if((nd->intent.open.flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+ if((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
disposition = FILE_CREATE;
- else if((nd->intent.open.flags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+ else if((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
disposition = FILE_OVERWRITE_IF;
- else if((nd->intent.open.flags & O_CREAT) == O_CREAT)
+ else if((oflags & O_CREAT) == O_CREAT)
disposition = FILE_OPEN_IF;
else {
cFYI(1,("Create flag not set in create function"));
FreeXid(xid);
return -ENOMEM;
}
-
- rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
+ if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
+ rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
desiredAccess, CREATE_NOT_DIR,
- &fileHandle, &oplock, buf, cifs_sb->local_nls);
+ &fileHandle, &oplock, buf, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ else
+ rc = -EIO; /* no NT SMB support fall into legacy open below */
+
+ if(rc == -EIO) {
+ /* old server, retry the open legacy style */
+ rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
+ desiredAccess, CREATE_NOT_DIR,
+ &fileHandle, &oplock, buf, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ }
if (rc) {
- cFYI(1, ("cifs_create returned 0x%x ", rc));
+ cFYI(1, ("cifs_create returned 0x%x", rc));
} else {
/* If Open reported that we actually created a file
then we now have to set the mode if possible */
(oplock & CIFS_CREATE_ACTION))
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
- (__u64)current->euid,
- (__u64)current->egid,
+ (__u64)current->fsuid,
+ (__u64)current->fsgid,
0 /* dev */,
- cifs_sb->local_nls);
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
} else {
CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
(__u64)-1,
(__u64)-1,
0 /* dev */,
- cifs_sb->local_nls);
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
}
else {
- /* BB implement via Windows security descriptors */
+ /* BB implement mode setting via Windows security descriptors */
/* eg CIFSSMBWinSetPerms(xid,pTcon,full_path,mode,-1,-1,local_nls);*/
/* could set r/o dos attribute if mode & 0222 == 0 */
}
else {
rc = cifs_get_inode_info(&newinode, full_path,
buf, inode->i_sb,xid);
- if(newinode)
+ if(newinode) {
newinode->i_mode = mode;
+ if((oplock & CIFS_CREATE_ACTION) &&
+ (cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_SET_UID)) {
+ newinode->i_uid = current->fsuid;
+ newinode->i_gid = current->fsgid;
+ }
+ }
}
if (rc != 0) {
- cFYI(1,("Create worked but get_inode_info failed with rc = %d",
+ cFYI(1,
+ ("Create worked but get_inode_info failed rc = %d",
rc));
} else {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_instantiate(direntry, newinode);
}
if((nd->flags & LOOKUP_OPEN) == FALSE) {
/* mknod case - do not leave file open */
CIFSSMBClose(xid, pTcon, fileHandle);
} else if(newinode) {
- pCifsFile = (struct cifsFileInfo *)
- kmalloc(sizeof (struct cifsFileInfo), GFP_KERNEL);
-
- if (pCifsFile) {
- memset((char *)pCifsFile, 0,
- sizeof (struct cifsFileInfo));
- pCifsFile->netfid = fileHandle;
- pCifsFile->pid = current->tgid;
- pCifsFile->pInode = newinode;
- pCifsFile->invalidHandle = FALSE;
- pCifsFile->closePend = FALSE;
- init_MUTEX(&pCifsFile->fh_sem);
- /* put the following in at open now */
- /* pCifsFile->pfile = file; */
- write_lock(&GlobalSMBSeslock);
- list_add(&pCifsFile->tlist,&pTcon->openFileList);
- pCifsInode = CIFS_I(newinode);
- if(pCifsInode) {
+ pCifsFile =
+ kzalloc(sizeof (struct cifsFileInfo), GFP_KERNEL);
+
+ if(pCifsFile == NULL)
+ goto cifs_create_out;
+ pCifsFile->netfid = fileHandle;
+ pCifsFile->pid = current->tgid;
+ pCifsFile->pInode = newinode;
+ pCifsFile->invalidHandle = FALSE;
+ pCifsFile->closePend = FALSE;
+ init_MUTEX(&pCifsFile->fh_sem);
+ init_MUTEX(&pCifsFile->lock_sem);
+ INIT_LIST_HEAD(&pCifsFile->llist);
+ atomic_set(&pCifsFile->wrtPending,0);
+
+ /* set the following in open now
+ pCifsFile->pfile = file; */
+ write_lock(&GlobalSMBSeslock);
+ list_add(&pCifsFile->tlist,&pTcon->openFileList);
+ pCifsInode = CIFS_I(newinode);
+ if(pCifsInode) {
/* if readable file instance put first in list*/
- if (write_only == TRUE) {
- list_add_tail(&pCifsFile->flist,
- &pCifsInode->openFileList);
- } else {
- list_add(&pCifsFile->flist,
- &pCifsInode->openFileList);
- }
- if((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
- pCifsInode->clientCanCacheAll = TRUE;
- pCifsInode->clientCanCacheRead = TRUE;
- cFYI(1,("Exclusive Oplock granted on inode %p",
- newinode));
- } else if((oplock & 0xF) == OPLOCK_READ)
- pCifsInode->clientCanCacheRead = TRUE;
+ if (write_only == TRUE) {
+ list_add_tail(&pCifsFile->flist,
+ &pCifsInode->openFileList);
+ } else {
+ list_add(&pCifsFile->flist,
+ &pCifsInode->openFileList);
}
- write_unlock(&GlobalSMBSeslock);
+ if((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
+ pCifsInode->clientCanCacheAll = TRUE;
+ pCifsInode->clientCanCacheRead = TRUE;
+ cFYI(1,("Exclusive Oplock for inode %p",
+ newinode));
+ } else if((oplock & 0xF) == OPLOCK_READ)
+ pCifsInode->clientCanCacheRead = TRUE;
}
+ write_unlock(&GlobalSMBSeslock);
}
}
-
- if (buf)
- kfree(buf);
- if (full_path)
- kfree(full_path);
+cifs_create_out:
+ kfree(buf);
+ kfree(full_path);
FreeXid(xid);
-
return rc;
}
-int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t device_number)
+int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
+ dev_t device_number)
{
int rc = -EPERM;
int xid;
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- down(&direntry->d_sb->s_vfs_rename_sem);
full_path = build_path_from_dentry(direntry);
- up(&direntry->d_sb->s_vfs_rename_sem);
if(full_path == NULL)
rc = -ENOMEM;
-
- if (full_path && (pTcon->ses->capabilities & CAP_UNIX)) {
+ else if (pTcon->ses->capabilities & CAP_UNIX) {
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
- mode,(__u64)current->euid,(__u64)current->egid,
- device_number, cifs_sb->local_nls);
+ mode,(__u64)current->fsuid,(__u64)current->fsgid,
+ device_number, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
} else {
rc = CIFSSMBUnixSetPerms(xid, pTcon,
full_path, mode, (__u64)-1, (__u64)-1,
- device_number, cifs_sb->local_nls);
+ device_number, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
}
if(!rc) {
rc = cifs_get_inode_info_unix(&newinode, full_path,
inode->i_sb,xid);
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
if(rc == 0)
d_instantiate(direntry, newinode);
}
+ } else {
+ if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+ int oplock = 0;
+ u16 fileHandle;
+ FILE_ALL_INFO * buf;
+
+ cFYI(1,("sfu compat create special file"));
+
+ buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
+ if(buf == NULL) {
+ kfree(full_path);
+ FreeXid(xid);
+ return -ENOMEM;
+ }
+
+ rc = CIFSSMBOpen(xid, pTcon, full_path,
+ FILE_CREATE, /* fail if exists */
+ GENERIC_WRITE /* BB would
+ WRITE_OWNER | WRITE_DAC be better? */,
+ /* Create a file and set the
+ file attribute to SYSTEM */
+ CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
+ &fileHandle, &oplock, buf,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+ /* BB FIXME - add handling for backlevel servers
+ which need legacy open and check for all
+ calls to SMBOpen for fallback to
+ SMBLeagcyOpen */
+ if(!rc) {
+ /* BB Do not bother to decode buf since no
+ local inode yet to put timestamps in,
+ but we can reuse it safely */
+ int bytes_written;
+ struct win_dev *pdev;
+ pdev = (struct win_dev *)buf;
+ if(S_ISCHR(mode)) {
+ memcpy(pdev->type, "IntxCHR", 8);
+ pdev->major =
+ cpu_to_le64(MAJOR(device_number));
+ pdev->minor =
+ cpu_to_le64(MINOR(device_number));
+ rc = CIFSSMBWrite(xid, pTcon,
+ fileHandle,
+ sizeof(struct win_dev),
+ 0, &bytes_written, (char *)pdev,
+ NULL, 0);
+ } else if(S_ISBLK(mode)) {
+ memcpy(pdev->type, "IntxBLK", 8);
+ pdev->major =
+ cpu_to_le64(MAJOR(device_number));
+ pdev->minor =
+ cpu_to_le64(MINOR(device_number));
+ rc = CIFSSMBWrite(xid, pTcon,
+ fileHandle,
+ sizeof(struct win_dev),
+ 0, &bytes_written, (char *)pdev,
+ NULL, 0);
+ } /* else if(S_ISFIFO */
+ CIFSSMBClose(xid, pTcon, fileHandle);
+ d_drop(direntry);
+ }
+ kfree(buf);
+ /* add code here to set EAs */
+ }
}
- if (full_path)
- kfree(full_path);
+ kfree(full_path);
FreeXid(xid);
-
return rc;
}
(" parent inode = 0x%p name is: %s and dentry = 0x%p",
parent_dir_inode, direntry->d_name.name, direntry));
- if(nd) { /* BB removeme */
- cFYI(1,("In lookup nd flags 0x%x open intent flags 0x%x",nd->flags,nd->intent.open.flags));
- } /* BB removeme BB */
/* BB Add check of incoming data - e.g. frame not longer than maximum SMB - let server check the namelen BB */
/* check whether path exists */
cifs_sb = CIFS_SB(parent_dir_inode->i_sb);
pTcon = cifs_sb->tcon;
+ /*
+ * Don't allow the separator character in a path component.
+ * The VFS will not allow "/", but "\" is allowed by posix.
+ */
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
+ int i;
+ for (i = 0; i < direntry->d_name.len; i++)
+ if (direntry->d_name.name[i] == '\\') {
+ cFYI(1, ("Invalid file name"));
+ FreeXid(xid);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
/* can not grab the rename sem here since it would
deadlock in the cases (beginning of sys_rename itself)
in which we already have the sb rename sem */
parent_dir_inode->i_sb,xid);
if ((rc == 0) && (newInode != NULL)) {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
- /* since paths are not looked up by component - the parent directories are presumed to be good here */
+ /* since paths are not looked up by component - the parent
+ directories are presumed to be good here */
renew_parental_timestamps(direntry);
} else if (rc == -ENOENT) {
rc = 0;
+ direntry->d_time = jiffies;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_add(direntry, NULL);
+ /* if it was once a directory (but how can we tell?) we could do
+ shrink_dcache_parent(direntry); */
} else {
- cERROR(1,("Error 0x%x or on cifs_get_inode_info in lookup",rc));
+ cERROR(1,("Error 0x%x on cifs_get_inode_info in lookup of %s",
+ rc,full_path));
/* BB special case check for Access Denied - watch security
exposure of returning dir info implicitly via different rc
if file exists or not but no access BB */
}
- if (full_path)
- kfree(full_path);
+ kfree(full_path);
FreeXid(xid);
return ERR_PTR(rc);
}
-int
-cifs_dir_open(struct inode *inode, struct file *file)
-{ /* NB: currently unused since searches are opened in readdir */
- int rc = 0;
- int xid;
- struct cifs_sb_info *cifs_sb;
- struct cifsTconInfo *pTcon;
- char *full_path = NULL;
-
- xid = GetXid();
-
- cifs_sb = CIFS_SB(inode->i_sb);
- pTcon = cifs_sb->tcon;
-
- if(file->f_dentry) {
- 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);
- } else {
- FreeXid(xid);
- return -EIO;
- }
-
- cFYI(1, ("inode = 0x%p and full path is %s", inode, full_path));
-
- if (full_path)
- kfree(full_path);
- FreeXid(xid);
- return rc;
-}
-
static int
cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
{
int isValid = 1;
-/* lock_kernel(); *//* surely we do not want to lock the kernel for a whole network round trip which could take seconds */
-
if (direntry->d_inode) {
if (cifs_revalidate(direntry)) {
- /* unlock_kernel(); */
return 0;
}
} else {
- cFYI(1,
- ("In cifs_d_revalidate with no inode but name = %s and dentry 0x%p",
- direntry->d_name.name, direntry));
+ cFYI(1, ("neg dentry 0x%p name = %s",
+ direntry, direntry->d_name.name));
+ if(time_after(jiffies, direntry->d_time + HZ) ||
+ !lookupCacheEnabled) {
+ d_drop(direntry);
+ isValid = 0;
+ }
}
-/* unlock_kernel(); */
-
return isValid;
}
/* d_delete: cifs_d_delete, *//* not needed except for debugging */
/* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */
};
+
+static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+ unsigned long hash;
+ int i;
+
+ hash = init_name_hash();
+ for (i = 0; i < q->len; i++)
+ hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
+ hash);
+ q->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
+ struct qstr *b)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+
+ if ((a->len == b->len) &&
+ (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
+ /*
+ * To preserve case, don't let an existing negative dentry's
+ * case take precedence. If a is not a negative dentry, this
+ * should have no side effects
+ */
+ memcpy((unsigned char *)a->name, b->name, a->len);
+ return 0;
+ }
+ return 1;
+}
+
+struct dentry_operations cifs_ci_dentry_ops = {
+ .d_revalidate = cifs_d_revalidate,
+ .d_hash = cifs_ci_hash,
+ .d_compare = cifs_ci_compare,
+};
git://git.onelab.eu / linux-2.6.git / blobdiff