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fs/cifs/dir.c
19.5 KB
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/* * fs/cifs/dir.c * * vfs operations that deal with dentries |
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* |
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* Copyright (C) International Business Machines Corp., 2002,2009 |
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* 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/slab.h> #include <linux/namei.h> |
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#include <linux/mount.h> |
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#include <linux/file.h> |
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#include "cifsfs.h" #include "cifspdu.h" #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_fs_sb.h" |
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static void |
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renew_parental_timestamps(struct dentry *direntry) { |
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/* BB check if there is a way to get the kernel to do this or if we really need this */ |
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do { direntry->d_time = jiffies; direntry = direntry->d_parent; |
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} while (!IS_ROOT(direntry)); |
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} /* Note: caller must free return buffer */ char * build_path_from_dentry(struct dentry *direntry) { struct dentry *temp; |
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int namelen; |
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int dfsplen; |
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char *full_path; |
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char dirsep; |
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struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
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struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
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unsigned seq; |
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|
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dirsep = CIFS_DIR_SEP(cifs_sb); |
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if (tcon->Flags & SMB_SHARE_IS_IN_DFS) dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); |
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else dfsplen = 0; |
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cifs_bp_rename_retry: |
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namelen = dfsplen; |
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seq = read_seqbegin(&rename_lock); rcu_read_lock(); |
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for (temp = direntry; !IS_ROOT(temp);) { namelen += (1 + temp->d_name.len); temp = temp->d_parent; |
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if (temp == NULL) { |
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cERROR(1, "corrupt dentry"); |
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rcu_read_unlock(); |
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return NULL; } } |
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rcu_read_unlock(); |
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full_path = kmalloc(namelen+1, GFP_KERNEL); |
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if (full_path == NULL) |
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return full_path; full_path[namelen] = 0; /* trailing null */ |
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rcu_read_lock(); |
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for (temp = direntry; !IS_ROOT(temp);) { |
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spin_lock(&temp->d_lock); |
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namelen -= 1 + temp->d_name.len; if (namelen < 0) { |
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spin_unlock(&temp->d_lock); |
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break; } else { |
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full_path[namelen] = dirsep; |
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strncpy(full_path + namelen + 1, temp->d_name.name, temp->d_name.len); |
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cFYI(0, "name: %s", full_path + namelen); |
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} |
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spin_unlock(&temp->d_lock); |
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temp = temp->d_parent; |
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if (temp == NULL) { |
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cERROR(1, "corrupt dentry"); |
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rcu_read_unlock(); |
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kfree(full_path); return NULL; } } |
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rcu_read_unlock(); if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { |
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cFYI(1, "did not end path lookup where expected. namelen=%d " "dfsplen=%d", namelen, dfsplen); |
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/* presumably this is only possible if racing with a rename |
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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); |
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goto cifs_bp_rename_retry; } |
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/* 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 */ |
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if (dfsplen) { |
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strncpy(full_path, tcon->treeName, dfsplen); |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { int i; for (i = 0; i < dfsplen; i++) { if (full_path[i] == '\\') full_path[i] = '/'; } } } |
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return full_path; } |
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/* Inode operations in similar order to how they appear in Linux file fs.h */ |
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int cifs_create(struct inode *inode, struct dentry *direntry, int mode, struct nameidata *nd) { int rc = -ENOENT; int xid; |
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int create_options = CREATE_NOT_DIR; |
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__u32 oplock = 0; |
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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. */ |
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int desiredAccess = GENERIC_READ | GENERIC_WRITE; __u16 fileHandle; struct cifs_sb_info *cifs_sb; |
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struct tcon_link *tlink; |
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struct cifs_tcon *tcon; |
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char *full_path = NULL; |
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FILE_ALL_INFO *buf = NULL; |
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struct inode *newinode = NULL; |
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int disposition = FILE_OVERWRITE_IF; |
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xid = GetXid(); cifs_sb = CIFS_SB(inode->i_sb); |
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tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) { FreeXid(xid); return PTR_ERR(tlink); |
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} |
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tcon = tlink_tcon(tlink); |
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|
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if (oplockEnabled) oplock = REQ_OPLOCK; |
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|
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if (nd) |
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oflags = nd->intent.open.file->f_flags; |
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else |
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oflags = O_RDONLY | O_CREAT; |
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|
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full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; goto cifs_create_out; } |
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if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
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rc = cifs_posix_open(full_path, &newinode, |
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inode->i_sb, mode, oflags, &oplock, &fileHandle, xid); |
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/* EIO could indicate that (posix open) operation is not supported, despite what server claimed in capability |
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negotiation. EREMOTE indicates DFS junction, which is not |
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handled in posix open */ |
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if (rc == 0) { |
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if (newinode == NULL) /* query inode info */ goto cifs_create_get_file_info; else /* success, no need to query */ goto cifs_create_set_dentry; } else if ((rc != -EIO) && (rc != -EREMOTE) && |
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(rc != -EOPNOTSUPP) && (rc != -EINVAL)) |
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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) */ } |
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|
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if (nd) { |
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/* if the file is going to stay open, then we need to set the desired access properly */ |
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desiredAccess = 0; |
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if (OPEN_FMODE(oflags) & FMODE_READ) |
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desiredAccess |= GENERIC_READ; /* is this too little? */ |
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if (OPEN_FMODE(oflags) & FMODE_WRITE) |
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desiredAccess |= GENERIC_WRITE; |
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|
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if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) |
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disposition = FILE_CREATE; |
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else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) |
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disposition = FILE_OVERWRITE_IF; |
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else if ((oflags & O_CREAT) == O_CREAT) |
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disposition = FILE_OPEN_IF; |
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else |
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cFYI(1, "Create flag not set in create function"); |
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} |
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/* BB add processing to set equivalent of mode - e.g. via CreateX with ACLs */ |
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|
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buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); if (buf == NULL) { |
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rc = -ENOMEM; goto cifs_create_out; |
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} |
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|
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/* * if we're not using unix extensions, see if we need to set * ATTR_READONLY on the create call */ |
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if (!tcon->unix_ext && (mode & S_IWUGO) == 0) |
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create_options |= CREATE_OPTION_READONLY; |
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if (tcon->ses->capabilities & CAP_NT_SMBS) |
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rc = CIFSSMBOpen(xid, tcon, full_path, disposition, |
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desiredAccess, create_options, |
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&fileHandle, &oplock, buf, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
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else rc = -EIO; /* no NT SMB support fall into legacy open below */ |
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if (rc == -EIO) { |
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/* old server, retry the open legacy style */ |
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rc = SMBLegacyOpen(xid, tcon, full_path, disposition, |
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desiredAccess, create_options, |
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&fileHandle, &oplock, buf, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
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} |
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if (rc) { |
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cFYI(1, "cifs_create returned 0x%x", rc); |
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goto cifs_create_out; } /* 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 = { |
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.mode = mode, .ctime = NO_CHANGE_64, .atime = NO_CHANGE_64, .mtime = NO_CHANGE_64, .device = 0, |
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}; 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(); |
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} else { |
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args.uid = NO_CHANGE_64; args.gid = NO_CHANGE_64; |
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} |
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CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, current->tgid); |
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} else { /* BB implement mode setting via Windows security descriptors e.g. */ /* CIFSSMBWinSetPerms(xid,tcon,path,mode,-1,-1,nls);*/ /* Could set r/o dos attribute if mode & 0222 == 0 */ } |
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|
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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(); if (inode->i_mode & S_ISGID) newinode->i_gid = inode->i_gid; else newinode->i_gid = current_fsgid(); |
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} |
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} |
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} |
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|
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cifs_create_set_dentry: if (rc == 0) |
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d_instantiate(direntry, newinode); |
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else |
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cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); |
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|
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if (newinode && nd) { |
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struct cifsFileInfo *pfile_info; |
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struct file *filp; filp = lookup_instantiate_filp(nd, direntry, generic_file_open); if (IS_ERR(filp)) { rc = PTR_ERR(filp); CIFSSMBClose(xid, tcon, fileHandle); goto cifs_create_out; } |
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pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
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if (pfile_info == NULL) { fput(filp); CIFSSMBClose(xid, tcon, fileHandle); |
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rc = -ENOMEM; |
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} |
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} else { CIFSSMBClose(xid, tcon, fileHandle); |
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} |
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|
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cifs_create_out: kfree(buf); kfree(full_path); |
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cifs_put_tlink(tlink); |
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FreeXid(xid); |
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return rc; } |
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int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t device_number) |
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{ int rc = -EPERM; int xid; struct cifs_sb_info *cifs_sb; |
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struct tcon_link *tlink; |
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struct cifs_tcon *pTcon; |
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struct cifs_io_parms io_parms; |
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char *full_path = NULL; |
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struct inode *newinode = NULL; |
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int oplock = 0; u16 fileHandle; FILE_ALL_INFO *buf = NULL; unsigned int bytes_written; struct win_dev *pdev; |
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if (!old_valid_dev(device_number)) return -EINVAL; |
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cifs_sb = CIFS_SB(inode->i_sb); |
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366 367 368 369 370 371 372 |
tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return PTR_ERR(tlink); pTcon = tlink_tcon(tlink); xid = GetXid(); |
1da177e4c Linux-2.6.12-rc2 |
373 |
|
1da177e4c Linux-2.6.12-rc2 |
374 |
full_path = build_path_from_dentry(direntry); |
5d9ac7fd3 cifs: clean up er... |
375 |
if (full_path == NULL) { |
1da177e4c Linux-2.6.12-rc2 |
376 |
rc = -ENOMEM; |
5d9ac7fd3 cifs: clean up er... |
377 378 379 380 |
goto mknod_out; } if (pTcon->unix_ext) { |
4e1e7fb9e bundle up Unix SE... |
381 |
struct cifs_unix_set_info_args args = { |
ce3b0f8d5 New helper - curr... |
382 |
.mode = mode & ~current_umask(), |
4e1e7fb9e bundle up Unix SE... |
383 384 385 386 387 |
.ctime = NO_CHANGE_64, .atime = NO_CHANGE_64, .mtime = NO_CHANGE_64, .device = device_number, }; |
5fdae1f68 [CIFS] whitespace... |
388 |
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b55 CRED: Wrap task c... |
389 390 |
args.uid = (__u64) current_fsuid(); args.gid = (__u64) current_fsgid(); |
1da177e4c Linux-2.6.12-rc2 |
391 |
} else { |
4e1e7fb9e bundle up Unix SE... |
392 393 |
args.uid = NO_CHANGE_64; args.gid = NO_CHANGE_64; |
1da177e4c Linux-2.6.12-rc2 |
394 |
} |
01ea95e3b cifs: rename CIFS... |
395 396 397 398 |
rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
5d9ac7fd3 cifs: clean up er... |
399 400 |
if (rc) goto mknod_out; |
1da177e4c Linux-2.6.12-rc2 |
401 |
|
5d9ac7fd3 cifs: clean up er... |
402 |
rc = cifs_get_inode_info_unix(&newinode, full_path, |
5fdae1f68 [CIFS] whitespace... |
403 |
inode->i_sb, xid); |
eda3c0298 [CIFS] Add compat... |
404 |
|
5d9ac7fd3 cifs: clean up er... |
405 406 407 |
if (rc == 0) d_instantiate(direntry, newinode); goto mknod_out; |
1da177e4c Linux-2.6.12-rc2 |
408 |
} |
5d9ac7fd3 cifs: clean up er... |
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 |
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) goto mknod_out; cFYI(1, "sfu compat create special file"); buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); if (buf == NULL) { kfree(full_path); rc = -ENOMEM; FreeXid(xid); return rc; } /* FIXME: would WRITE_OWNER | WRITE_DAC be better? */ rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, GENERIC_WRITE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, &fileHandle, &oplock, buf, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc) goto mknod_out; /* BB Do not bother to decode buf since no local inode yet to put * timestamps in, but we can reuse it safely */ pdev = (struct win_dev *)buf; |
fa2989f44 CIFS: Use pid sav... |
435 436 437 438 439 |
io_parms.netfid = fileHandle; io_parms.pid = current->tgid; io_parms.tcon = pTcon; io_parms.offset = 0; io_parms.length = sizeof(struct win_dev); |
5d9ac7fd3 cifs: clean up er... |
440 441 442 443 444 445 |
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)); |
fa2989f44 CIFS: Use pid sav... |
446 447 |
rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, (char *)pdev, |
5d9ac7fd3 cifs: clean up er... |
448 449 450 451 452 453 454 |
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)); |
fa2989f44 CIFS: Use pid sav... |
455 456 |
rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, (char *)pdev, |
5d9ac7fd3 cifs: clean up er... |
457 458 459 460 461 462 463 464 |
NULL, 0); } /* else if (S_ISFIFO) */ CIFSSMBClose(xid, pTcon, fileHandle); d_drop(direntry); /* FIXME: add code here to set EAs */ mknod_out: |
d14537f10 [PATCH] cifs: rem... |
465 |
kfree(full_path); |
5d9ac7fd3 cifs: clean up er... |
466 |
kfree(buf); |
1da177e4c Linux-2.6.12-rc2 |
467 |
FreeXid(xid); |
7ffec3724 cifs: add refcoun... |
468 |
cifs_put_tlink(tlink); |
1da177e4c Linux-2.6.12-rc2 |
469 470 |
return rc; } |
1da177e4c Linux-2.6.12-rc2 |
471 |
struct dentry * |
5fdae1f68 [CIFS] whitespace... |
472 473 |
cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct nameidata *nd) |
1da177e4c Linux-2.6.12-rc2 |
474 475 476 |
{ int xid; int rc = 0; /* to get around spurious gcc warning, set to zero here */ |
590a3fe0e cifs: fix oplock ... |
477 |
__u32 oplock = 0; |
a6ce4932f [CIFS] Add suppor... |
478 479 |
__u16 fileHandle = 0; bool posix_open = false; |
1da177e4c Linux-2.6.12-rc2 |
480 |
struct cifs_sb_info *cifs_sb; |
7ffec3724 cifs: add refcoun... |
481 |
struct tcon_link *tlink; |
96daf2b09 [CIFS] Rename thr... |
482 |
struct cifs_tcon *pTcon; |
2422f676f cifs: move cifs_n... |
483 |
struct cifsFileInfo *cfile; |
1da177e4c Linux-2.6.12-rc2 |
484 485 |
struct inode *newInode = NULL; char *full_path = NULL; |
a6ce4932f [CIFS] Add suppor... |
486 |
struct file *filp; |
1da177e4c Linux-2.6.12-rc2 |
487 488 |
xid = GetXid(); |
b6b38f704 [CIFS] Neaten cER... |
489 490 |
cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p", parent_dir_inode, direntry->d_name.name, direntry); |
1da177e4c Linux-2.6.12-rc2 |
491 |
|
1da177e4c Linux-2.6.12-rc2 |
492 493 494 |
/* check whether path exists */ cifs_sb = CIFS_SB(parent_dir_inode->i_sb); |
7ffec3724 cifs: add refcoun... |
495 496 497 498 499 500 |
tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) { FreeXid(xid); return (struct dentry *)tlink; } pTcon = tlink_tcon(tlink); |
1da177e4c Linux-2.6.12-rc2 |
501 |
|
296034f7d [CIFS] Don't allo... |
502 503 504 505 506 507 508 509 |
/* * 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] == '\\') { |
b6b38f704 [CIFS] Neaten cER... |
510 |
cFYI(1, "Invalid file name"); |
7ffec3724 cifs: add refcoun... |
511 512 |
rc = -EINVAL; goto lookup_out; |
296034f7d [CIFS] Don't allo... |
513 514 |
} } |
5ddf1e0ff cifs: fix regress... |
515 516 517 518 |
/* * O_EXCL: optimize away the lookup, but don't hash the dentry. Let * the VFS handle the create. */ |
8e6c0332d [CIFS] fix oops i... |
519 |
if (nd && (nd->flags & LOOKUP_EXCL)) { |
5ddf1e0ff cifs: fix regress... |
520 |
d_instantiate(direntry, NULL); |
7ffec3724 cifs: add refcoun... |
521 522 |
rc = 0; goto lookup_out; |
5ddf1e0ff cifs: fix regress... |
523 |
} |
1da177e4c Linux-2.6.12-rc2 |
524 525 526 527 |
/* 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 */ full_path = build_path_from_dentry(direntry); |
5fdae1f68 [CIFS] whitespace... |
528 |
if (full_path == NULL) { |
7ffec3724 cifs: add refcoun... |
529 530 |
rc = -ENOMEM; goto lookup_out; |
1da177e4c Linux-2.6.12-rc2 |
531 532 533 |
} if (direntry->d_inode != NULL) { |
b6b38f704 [CIFS] Neaten cER... |
534 |
cFYI(1, "non-NULL inode in lookup"); |
1da177e4c Linux-2.6.12-rc2 |
535 |
} else { |
b6b38f704 [CIFS] Neaten cER... |
536 |
cFYI(1, "NULL inode in lookup"); |
1da177e4c Linux-2.6.12-rc2 |
537 |
} |
b6b38f704 [CIFS] Neaten cER... |
538 |
cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); |
1da177e4c Linux-2.6.12-rc2 |
539 |
|
8db14ca12 [CIFS] Avoid open... |
540 541 542 543 544 545 546 547 548 549 |
/* Posix open is only called (at lookup time) for file create now. * For opens (rather than creates), because we do not know if it * is a file or directory yet, and current Samba no longer allows * us to do posix open on dirs, we could end up wasting an open call * on what turns out to be a dir. For file opens, we wait to call posix * open till cifs_open. It could be added here (lookup) in the future * but the performance tradeoff of the extra network request when EISDIR * or EACCES is returned would have to be weighed against the 50% * reduction in network traffic in the other paths. */ |
a6ce4932f [CIFS] Add suppor... |
550 |
if (pTcon->unix_ext) { |
435278038 cifs_lookup(): LO... |
551 |
if (nd && !(nd->flags & LOOKUP_DIRECTORY) && |
8db14ca12 [CIFS] Avoid open... |
552 |
(nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && |
608712fe8 cifs: fix flags h... |
553 |
(nd->intent.open.file->f_flags & O_CREAT)) { |
2422f676f cifs: move cifs_n... |
554 |
rc = cifs_posix_open(full_path, &newInode, |
fa588e0c5 [CIFS] Allow null... |
555 |
parent_dir_inode->i_sb, |
703a3b8e5 [CIFS] fix posix ... |
556 |
nd->intent.open.create_mode, |
608712fe8 cifs: fix flags h... |
557 |
nd->intent.open.file->f_flags, &oplock, |
a6ce4932f [CIFS] Add suppor... |
558 |
&fileHandle, xid); |
8db14ca12 [CIFS] Avoid open... |
559 560 561 562 563 564 565 566 567 568 569 |
/* * The check below works around a bug in POSIX * open in samba versions 3.3.1 and earlier where * open could incorrectly fail with invalid parameter. * If either that or op not supported returned, follow * the normal lookup. */ if ((rc == 0) || (rc == -ENOENT)) posix_open = true; else if ((rc == -EINVAL) || (rc != -EOPNOTSUPP)) pTcon->broken_posix_open = true; |
a6ce4932f [CIFS] Add suppor... |
570 571 572 573 574 |
} if (!posix_open) rc = cifs_get_inode_info_unix(&newInode, full_path, parent_dir_inode->i_sb, xid); } else |
1da177e4c Linux-2.6.12-rc2 |
575 |
rc = cifs_get_inode_info(&newInode, full_path, NULL, |
a6ce4932f [CIFS] Add suppor... |
576 |
parent_dir_inode->i_sb, xid, NULL); |
1da177e4c Linux-2.6.12-rc2 |
577 578 |
if ((rc == 0) && (newInode != NULL)) { |
1da177e4c Linux-2.6.12-rc2 |
579 |
d_add(direntry, newInode); |
2422f676f cifs: move cifs_n... |
580 |
if (posix_open) { |
6ca9f3bae cifs: pass instan... |
581 582 583 584 585 586 587 |
filp = lookup_instantiate_filp(nd, direntry, generic_file_open); if (IS_ERR(filp)) { rc = PTR_ERR(filp); CIFSSMBClose(xid, pTcon, fileHandle); goto lookup_out; } |
abfe1eedd cifs: eliminate t... |
588 589 |
cfile = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); |
2422f676f cifs: move cifs_n... |
590 |
if (cfile == NULL) { |
6ca9f3bae cifs: pass instan... |
591 |
fput(filp); |
2422f676f cifs: move cifs_n... |
592 593 594 595 |
CIFSSMBClose(xid, pTcon, fileHandle); rc = -ENOMEM; goto lookup_out; } |
2422f676f cifs: move cifs_n... |
596 |
} |
5fdae1f68 [CIFS] whitespace... |
597 |
/* since paths are not looked up by component - the parent |
3abb92722 [CIFS] When file ... |
598 |
directories are presumed to be good here */ |
1da177e4c Linux-2.6.12-rc2 |
599 600 601 602 |
renew_parental_timestamps(direntry); } else if (rc == -ENOENT) { rc = 0; |
3abb92722 [CIFS] When file ... |
603 |
direntry->d_time = jiffies; |
1da177e4c Linux-2.6.12-rc2 |
604 |
d_add(direntry, NULL); |
5fdae1f68 [CIFS] whitespace... |
605 606 |
/* if it was once a directory (but how can we tell?) we could do shrink_dcache_parent(direntry); */ |
ed2b91701 [CIFS] Do not log... |
607 |
} else if (rc != -EACCES) { |
b6b38f704 [CIFS] Neaten cER... |
608 |
cERROR(1, "Unexpected lookup error %d", rc); |
ed2b91701 [CIFS] Do not log... |
609 610 |
/* We special case check for Access Denied - since that is a common return code */ |
1da177e4c Linux-2.6.12-rc2 |
611 |
} |
2422f676f cifs: move cifs_n... |
612 |
lookup_out: |
d14537f10 [PATCH] cifs: rem... |
613 |
kfree(full_path); |
7ffec3724 cifs: add refcoun... |
614 |
cifs_put_tlink(tlink); |
1da177e4c Linux-2.6.12-rc2 |
615 616 617 |
FreeXid(xid); return ERR_PTR(rc); } |
1da177e4c Linux-2.6.12-rc2 |
618 619 620 |
static int cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) { |
3ca30d40a CIFS: Fix oops wh... |
621 |
if (nd && (nd->flags & LOOKUP_RCU)) |
34286d666 fs: rcu-walk awar... |
622 |
return -ECHILD; |
1da177e4c Linux-2.6.12-rc2 |
623 |
if (direntry->d_inode) { |
df2cf170c cifs: overhaul ci... |
624 |
if (cifs_revalidate_dentry(direntry)) |
1da177e4c Linux-2.6.12-rc2 |
625 |
return 0; |
262f86adc cifs: don't overw... |
626 627 |
else return 1; |
1da177e4c Linux-2.6.12-rc2 |
628 |
} |
262f86adc cifs: don't overw... |
629 630 631 632 633 634 635 636 637 638 639 640 |
/* * This may be nfsd (or something), anyway, we can't see the * intent of this. So, since this can be for creation, drop it. */ if (!nd) return 0; /* * Drop the negative dentry, in order to make sure to use the * case sensitive name which is specified by user if this is * for creation. */ |
407938e79 LOOKUP_CREATE and... |
641 642 |
if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) return 0; |
262f86adc cifs: don't overw... |
643 644 645 646 647 |
if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) return 0; return 1; |
1da177e4c Linux-2.6.12-rc2 |
648 649 650 651 652 |
} /* static int cifs_d_delete(struct dentry *direntry) { int rc = 0; |
b6b38f704 [CIFS] Neaten cER... |
653 |
cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); |
1da177e4c Linux-2.6.12-rc2 |
654 655 656 |
return rc; } */ |
4fd03e84d constify dentry_o... |
657 |
const struct dentry_operations cifs_dentry_ops = { |
1da177e4c Linux-2.6.12-rc2 |
658 |
.d_revalidate = cifs_d_revalidate, |
01c64feac CIFS: Use d_autom... |
659 |
.d_automount = cifs_dfs_d_automount, |
5fdae1f68 [CIFS] whitespace... |
660 |
/* d_delete: cifs_d_delete, */ /* not needed except for debugging */ |
1da177e4c Linux-2.6.12-rc2 |
661 |
}; |
b92327fe6 [CIFS] Finish up ... |
662 |
|
b1e6a015a fs: change d_hash... |
663 664 |
static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, struct qstr *q) |
b92327fe6 [CIFS] Finish up ... |
665 |
{ |
b1e6a015a fs: change d_hash... |
666 |
struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; |
b92327fe6 [CIFS] Finish up ... |
667 668 669 670 671 672 673 674 675 676 677 |
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; } |
621e155a3 fs: change d_comp... |
678 679 680 681 |
static int cifs_ci_compare(const struct dentry *parent, const struct inode *pinode, const struct dentry *dentry, const struct inode *inode, unsigned int len, const char *str, const struct qstr *name) |
b92327fe6 [CIFS] Finish up ... |
682 |
{ |
621e155a3 fs: change d_comp... |
683 |
struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; |
b92327fe6 [CIFS] Finish up ... |
684 |
|
621e155a3 fs: change d_comp... |
685 686 |
if ((name->len == len) && (nls_strnicmp(codepage, name->name, str, len) == 0)) |
b92327fe6 [CIFS] Finish up ... |
687 |
return 0; |
b92327fe6 [CIFS] Finish up ... |
688 689 |
return 1; } |
4fd03e84d constify dentry_o... |
690 |
const struct dentry_operations cifs_ci_dentry_ops = { |
b92327fe6 [CIFS] Finish up ... |
691 692 693 |
.d_revalidate = cifs_d_revalidate, .d_hash = cifs_ci_hash, .d_compare = cifs_ci_compare, |
01c64feac CIFS: Use d_autom... |
694 |
.d_automount = cifs_dfs_d_automount, |
b92327fe6 [CIFS] Finish up ... |
695 |
}; |