*
* vfs operations that deal with dentries
*
- * Copyright (C) International Business Machines Corp., 2002,2008
+ * Copyright (C) International Business Machines Corp., 2002,2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
return full_path;
}
+static int cifs_posix_open(char *full_path, struct inode **pinode,
+ struct super_block *sb, int mode, int oflags,
+ int *poplock, __u16 *pnetfid, int xid)
+{
+ int rc;
+ __u32 oplock;
+ FILE_UNIX_BASIC_INFO *presp_data;
+ __u32 posix_flags = 0;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+
+ cFYI(1, ("posix open %s", full_path));
+
+ presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
+ if (presp_data == NULL)
+ return -ENOMEM;
+
+/* So far cifs posix extensions can only map the following flags.
+ There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but
+ so far we do not seem to need them, and we can treat them as local only */
+ if ((oflags & (FMODE_READ | FMODE_WRITE)) ==
+ (FMODE_READ | FMODE_WRITE))
+ posix_flags = SMB_O_RDWR;
+ else if (oflags & FMODE_READ)
+ posix_flags = SMB_O_RDONLY;
+ else if (oflags & FMODE_WRITE)
+ posix_flags = SMB_O_WRONLY;
+ if (oflags & O_CREAT)
+ posix_flags |= SMB_O_CREAT;
+ if (oflags & O_EXCL)
+ posix_flags |= SMB_O_EXCL;
+ if (oflags & O_TRUNC)
+ posix_flags |= SMB_O_TRUNC;
+ if (oflags & O_APPEND)
+ posix_flags |= SMB_O_APPEND;
+ if (oflags & O_SYNC)
+ posix_flags |= SMB_O_SYNC;
+ if (oflags & O_DIRECTORY)
+ posix_flags |= SMB_O_DIRECTORY;
+ if (oflags & O_NOFOLLOW)
+ posix_flags |= SMB_O_NOFOLLOW;
+ if (oflags & O_DIRECT)
+ posix_flags |= SMB_O_DIRECT;
+
+
+ rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode,
+ pnetfid, presp_data, &oplock, full_path,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc)
+ goto posix_open_ret;
+
+ if (presp_data->Type == cpu_to_le32(-1))
+ goto posix_open_ret; /* open ok, caller does qpathinfo */
+
+ /* get new inode and set it up */
+ if (!pinode)
+ goto posix_open_ret; /* caller does not need info */
+
+ *pinode = cifs_new_inode(sb, &presp_data->UniqueId);
+
+ /* We do not need to close the file if new_inode fails since
+ the caller will retry qpathinfo as long as inode is null */
+ if (*pinode == NULL)
+ goto posix_open_ret;
+
+ posix_fill_in_inode(*pinode, presp_data, 1);
+
+posix_open_ret:
+ kfree(presp_data);
+ return rc;
+}
+
+static void setup_cifs_dentry(struct cifsTconInfo *tcon,
+ struct dentry *direntry,
+ struct inode *newinode)
+{
+ if (tcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
+ d_instantiate(direntry, newinode);
+}
+
/* Inode operations in similar order to how they appear in Linux file fs.h */
int
int xid;
int create_options = CREATE_NOT_DIR;
int oplock = 0;
+ int oflags;
+ /*
+ * BB below access is probably too much for mknod to request
+ * but we have to do query and setpathinfo so requesting
+ * less could fail (unless we want to request getatr and setatr
+ * permissions (only). At least for POSIX we do not have to
+ * request so much.
+ */
int desiredAccess = GENERIC_READ | GENERIC_WRITE;
__u16 fileHandle;
struct cifs_sb_info *cifs_sb;
- struct cifsTconInfo *pTcon;
+ struct cifsTconInfo *tcon;
char *full_path = NULL;
FILE_ALL_INFO *buf = NULL;
struct inode *newinode = NULL;
- struct cifsFileInfo *pCifsFile = NULL;
struct cifsInodeInfo *pCifsInode;
int disposition = FILE_OVERWRITE_IF;
bool write_only = false;
xid = GetXid();
cifs_sb = CIFS_SB(inode->i_sb);
- pTcon = cifs_sb->tcon;
+ tcon = cifs_sb->tcon;
full_path = build_path_from_dentry(direntry);
if (full_path == NULL) {
return -ENOMEM;
}
- if (nd && (nd->flags & LOOKUP_OPEN)) {
- int oflags = nd->intent.open.flags;
+ mode &= ~current->fs->umask;
+ if (oplockEnabled)
+ oplock = REQ_OPLOCK;
+
+ if (nd && (nd->flags & LOOKUP_OPEN))
+ oflags = nd->intent.open.flags;
+ else
+ oflags = FMODE_READ;
+
+ if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) &&
+ (CIFS_UNIX_POSIX_PATH_OPS_CAP &
+ le64_to_cpu(tcon->fsUnixInfo.Capability))) {
+ rc = cifs_posix_open(full_path, &newinode, inode->i_sb,
+ mode, oflags, &oplock, &fileHandle, xid);
+ /* EIO could indicate that (posix open) operation is not
+ supported, despite what server claimed in capability
+ negotation. EREMOTE indicates DFS junction, which is not
+ handled in posix open */
+
+ if ((rc == 0) && (newinode == NULL))
+ goto cifs_create_get_file_info; /* query inode info */
+ else if (rc == 0) /* success, no need to query */
+ goto cifs_create_set_dentry;
+ else if ((rc != -EIO) && (rc != -EREMOTE) &&
+ (rc != -EOPNOTSUPP)) /* path not found or net err */
+ goto cifs_create_out;
+ /* else fallthrough to retry, using older open call, this is
+ case where server does not support this SMB level, and
+ falsely claims capability (also get here for DFS case
+ which should be rare for path not covered on files) */
+ }
+ if (nd && (nd->flags & LOOKUP_OPEN)) {
+ /* if the file is going to stay open, then we
+ need to set the desired access properly */
desiredAccess = 0;
if (oflags & FMODE_READ)
- desiredAccess |= GENERIC_READ;
+ desiredAccess |= GENERIC_READ; /* is this too little? */
if (oflags & FMODE_WRITE) {
desiredAccess |= GENERIC_WRITE;
if (!(oflags & FMODE_READ))
/* BB add processing to set equivalent of mode - e.g. via CreateX with
ACLs */
- if (oplockEnabled)
- oplock = REQ_OPLOCK;
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL) {
return -ENOMEM;
}
- mode &= ~current->fs->umask;
-
/*
* if we're not using unix extensions, see if we need to set
* ATTR_READONLY on the create call
*/
- if (!pTcon->unix_ext && (mode & S_IWUGO) == 0)
+ if (!tcon->unix_ext && (mode & S_IWUGO) == 0)
create_options |= CREATE_OPTION_READONLY;
if (cifs_sb->tcon->ses->capabilities & CAP_NT_SMBS)
- rc = CIFSSMBOpen(xid, pTcon, full_path, disposition,
+ rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
desiredAccess, create_options,
&fileHandle, &oplock, buf, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc == -EIO) {
/* old server, retry the open legacy style */
- rc = SMBLegacyOpen(xid, pTcon, full_path, disposition,
+ rc = SMBLegacyOpen(xid, tcon, full_path, disposition,
desiredAccess, create_options,
&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 {
- /* If Open reported that we actually created a file
- then we now have to set the mode if possible */
- if ((pTcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
- CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
- (__u64)current->fsuid,
- (__u64)current->fsgid,
- 0 /* dev */,
- 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->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- }
- } else {
- /* BB implement mode setting via Windows security
- descriptors e.g. */
- /* CIFSSMBWinSetPerms(xid,pTcon,path,mode,-1,-1,nls);*/
+ goto cifs_create_out;
+ }
- /* Could set r/o dos attribute if mode & 0222 == 0 */
+ /* If Open reported that we actually created a file
+ then we now have to set the mode if possible */
+ if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
+ struct cifs_unix_set_info_args args = {
+ .mode = mode,
+ .ctime = NO_CHANGE_64,
+ .atime = NO_CHANGE_64,
+ .mtime = NO_CHANGE_64,
+ .device = 0,
+ };
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+ args.uid = (__u64) current_fsuid();
+ if (inode->i_mode & S_ISGID)
+ args.gid = (__u64) inode->i_gid;
+ else
+ args.gid = (__u64) current_fsgid();
+ } else {
+ args.uid = NO_CHANGE_64;
+ args.gid = NO_CHANGE_64;
}
+ CIFSSMBUnixSetInfo(xid, tcon, full_path, &args,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ } else {
+ /* BB implement mode setting via Windows security
+ descriptors e.g. */
+ /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/
- /* server might mask mode so we have to query for it */
- if (pTcon->unix_ext)
- rc = cifs_get_inode_info_unix(&newinode, full_path,
- inode->i_sb, xid);
- else {
- rc = cifs_get_inode_info(&newinode, full_path,
- buf, inode->i_sb, xid,
- &fileHandle);
- if (newinode) {
+ /* Could set r/o dos attribute if mode & 0222 == 0 */
+ }
+
+cifs_create_get_file_info:
+ /* server might mask mode so we have to query for it */
+ if (tcon->unix_ext)
+ rc = cifs_get_inode_info_unix(&newinode, full_path,
+ inode->i_sb, xid);
+ else {
+ rc = cifs_get_inode_info(&newinode, full_path, buf,
+ inode->i_sb, xid, &fileHandle);
+ if (newinode) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
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 ((oplock & CIFS_CREATE_ACTION) &&
+ (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
+ newinode->i_uid = current_fsuid();
+ if (inode->i_mode & S_ISGID)
+ newinode->i_gid = inode->i_gid;
+ else
+ newinode->i_gid = current_fsgid();
}
}
+ }
- if (rc != 0) {
- cFYI(1,
- ("Create worked but get_inode_info failed rc = %d",
- rc));
- } else {
- if (pTcon->nocase)
- direntry->d_op = &cifs_ci_dentry_ops;
- else
- direntry->d_op = &cifs_dentry_ops;
- d_instantiate(direntry, newinode);
- }
- if ((nd == NULL /* nfsd case - nfs srv does not set nd */) ||
- (!(nd->flags & LOOKUP_OPEN))) {
- /* mknod case - do not leave file open */
- CIFSSMBClose(xid, pTcon, fileHandle);
- } else if (newinode) {
- 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);
- mutex_init(&pCifsFile->lock_mutex);
- INIT_LIST_HEAD(&pCifsFile->llist);
- atomic_set(&pCifsFile->wrtPending, 0);
-
- /* set the following in open now
+cifs_create_set_dentry:
+ if (rc == 0)
+ setup_cifs_dentry(tcon, direntry, newinode);
+ else
+ cFYI(1, ("Create worked, get_inode_info failed rc = %d", rc));
+
+ /* nfsd case - nfs srv does not set nd */
+ if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) {
+ /* mknod case - do not leave file open */
+ CIFSSMBClose(xid, tcon, fileHandle);
+ } else if (newinode) {
+ struct cifsFileInfo *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);
+ mutex_init(&pCifsFile->lock_mutex);
+ 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) {
- 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 inode %p",
- newinode));
- } else if ((oplock & 0xF) == OPLOCK_READ)
- pCifsInode->clientCanCacheRead = true;
+ write_lock(&GlobalSMBSeslock);
+ list_add(&pCifsFile->tlist, &tcon->openFileList);
+ pCifsInode = CIFS_I(newinode);
+ if (pCifsInode) {
+ /* if readable file instance put first in list*/
+ if (write_only) {
+ 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 inode %p",
+ newinode));
+ } else if ((oplock & 0xF) == OPLOCK_READ)
+ pCifsInode->clientCanCacheRead = true;
}
+ write_unlock(&GlobalSMBSeslock);
}
cifs_create_out:
kfree(buf);
if (full_path == NULL)
rc = -ENOMEM;
else if (pTcon->unix_ext) {
- mode &= ~current->fs->umask;
+ struct cifs_unix_set_info_args args = {
+ .mode = mode & ~current->fs->umask,
+ .ctime = NO_CHANGE_64,
+ .atime = NO_CHANGE_64,
+ .mtime = NO_CHANGE_64,
+ .device = device_number,
+ };
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
- rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
- mode, (__u64)current->fsuid,
- (__u64)current->fsgid,
- device_number, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ args.uid = (__u64) current_fsuid();
+ args.gid = (__u64) current_fsgid();
} else {
- rc = CIFSSMBUnixSetPerms(xid, pTcon,
- full_path, mode, (__u64)-1, (__u64)-1,
- device_number, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ args.uid = NO_CHANGE_64;
+ args.gid = NO_CHANGE_64;
}
+ rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path,
+ &args, 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,
xid = GetXid();
- cFYI(1, (" parent inode = 0x%p name is: %s and dentry = 0x%p",
+ cFYI(1, ("parent inode = 0x%p name is: %s and dentry = 0x%p",
parent_dir_inode, direntry->d_name.name, direntry));
/* check whether path exists */
}
if (direntry->d_inode != NULL) {
- cFYI(1, (" non-NULL inode in lookup"));
+ cFYI(1, ("non-NULL inode in lookup"));
} else {
- cFYI(1, (" NULL inode in lookup"));
+ cFYI(1, ("NULL inode in lookup"));
}
- cFYI(1,
- (" Full path: %s inode = 0x%p", full_path, direntry->d_inode));
+ cFYI(1, ("Full path: %s inode = 0x%p", full_path, direntry->d_inode));
if (pTcon->unix_ext)
rc = cifs_get_inode_info_unix(&newInode, full_path,
* case take precedence. If a is not a negative dentry, this
* should have no side effects
*/
- memcpy(a->name, b->name, a->len);
+ memcpy((void *)a->name, b->name, a->len);
return 0;
}
return 1;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff