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-rw-r--r--fs/cifs/dir.c189
1 files changed, 54 insertions, 135 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index f54e1866f0f4..e3137aa48cdd 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -101,68 +101,15 @@ cifs_bp_rename_retry:
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 */
-
- 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;
-}
+ full_path[namelen+2] = 0;
+BB remove above eight lines BB */
/* Inode operations in similar order to how they appear in the Linux file fs.h */
@@ -235,7 +182,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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);
if (rc) {
cFYI(1, ("cifs_create returned 0x%x ", rc));
} else {
@@ -248,13 +196,17 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
(__u64)current->euid,
(__u64)current->egid,
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 */
@@ -284,51 +236,48 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
/* mknod case - do not leave file open */
CIFSSMBClose(xid, pTcon, fileHandle);
} else if(newinode) {
- pCifsFile = (struct cifsFileInfo *)
+ pCifsFile =
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) {
+
+ if(pCifsFile == NULL)
+ goto cifs_create_out;
+ 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);
+ /* 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;
}
@@ -359,11 +308,15 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
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);
+ 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) {
@@ -375,10 +328,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
}
}
- if (full_path)
- kfree(full_path);
+ kfree(full_path);
FreeXid(xid);
-
return rc;
}
@@ -447,43 +398,11 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct name
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)
{
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.