diff options
Diffstat (limited to 'fs/cifs/dir.c')
| -rw-r--r-- | fs/cifs/dir.c | 758 |
1 files changed, 758 insertions, 0 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c new file mode 100644 index 00000000..ec4e9a2a --- /dev/null +++ b/fs/cifs/dir.c @@ -0,0 +1,758 @@ +/* + * fs/cifs/dir.c + * + * vfs operations that deal with dentries + * + * 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 + * 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> +#include <linux/mount.h> +#include <linux/file.h> +#include "cifsfs.h" +#include "cifspdu.h" +#include "cifsglob.h" +#include "cifsproto.h" +#include "cifs_debug.h" +#include "cifs_fs_sb.h" + +static void +renew_parental_timestamps(struct dentry *direntry) +{ + /* BB check if there is a way to get the kernel to do this or if we + really need this */ + do { + direntry->d_time = jiffies; + direntry = direntry->d_parent; + } while (!IS_ROOT(direntry)); +} + +/* Note: caller must free return buffer */ +char * +build_path_from_dentry(struct dentry *direntry) +{ + struct dentry *temp; + int namelen; + int dfsplen; + char *full_path; + char dirsep; + struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); + struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); + unsigned seq; + + dirsep = CIFS_DIR_SEP(cifs_sb); + if (tcon->Flags & SMB_SHARE_IS_IN_DFS) + dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); + else + dfsplen = 0; +cifs_bp_rename_retry: + namelen = dfsplen; + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); + for (temp = direntry; !IS_ROOT(temp);) { + namelen += (1 + temp->d_name.len); + temp = temp->d_parent; + if (temp == NULL) { + cERROR(1, "corrupt dentry"); + rcu_read_unlock(); + return NULL; + } + } + rcu_read_unlock(); + + full_path = kmalloc(namelen+1, GFP_KERNEL); + if (full_path == NULL) + return full_path; + full_path[namelen] = 0; /* trailing null */ + rcu_read_lock(); + for (temp = direntry; !IS_ROOT(temp);) { + spin_lock(&temp->d_lock); + namelen -= 1 + temp->d_name.len; + if (namelen < 0) { + spin_unlock(&temp->d_lock); + break; + } else { + full_path[namelen] = dirsep; + strncpy(full_path + namelen + 1, temp->d_name.name, + temp->d_name.len); + cFYI(0, "name: %s", full_path + namelen); + } + spin_unlock(&temp->d_lock); + temp = temp->d_parent; + if (temp == NULL) { + cERROR(1, "corrupt dentry"); + rcu_read_unlock(); + kfree(full_path); + return NULL; + } + } + rcu_read_unlock(); + if (namelen != dfsplen || read_seqretry(&rename_lock, seq)) { + cFYI(1, "did not end path lookup where expected. namelen=%d " + "dfsplen=%d", namelen, dfsplen); + /* 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); + 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 */ + + if (dfsplen) { + strncpy(full_path, tcon->treeName, dfsplen); + 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] = '/'; + } + } + } + return full_path; +} + +/* Inode operations in similar order to how they appear in Linux file fs.h */ + +int +cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode, + struct nameidata *nd) +{ + int rc = -ENOENT; + int xid; + int create_options = CREATE_NOT_DIR; + __u32 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 tcon_link *tlink; + struct cifs_tcon *tcon; + char *full_path = NULL; + FILE_ALL_INFO *buf = NULL; + struct inode *newinode = NULL; + int disposition = FILE_OVERWRITE_IF; + + xid = GetXid(); + + cifs_sb = CIFS_SB(inode->i_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + FreeXid(xid); + return PTR_ERR(tlink); + } + tcon = tlink_tcon(tlink); + + if (tcon->ses->server->oplocks) + oplock = REQ_OPLOCK; + + if (nd) + oflags = nd->intent.open.file->f_flags; + else + oflags = O_RDONLY | O_CREAT; + + full_path = build_path_from_dentry(direntry); + if (full_path == NULL) { + rc = -ENOMEM; + goto cifs_create_out; + } + + 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 + negotiation. EREMOTE indicates DFS junction, which is not + handled in posix open */ + + if (rc == 0) { + 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) && + (rc != -EOPNOTSUPP) && (rc != -EINVAL)) + 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) { + /* if the file is going to stay open, then we + need to set the desired access properly */ + desiredAccess = 0; + if (OPEN_FMODE(oflags) & FMODE_READ) + desiredAccess |= GENERIC_READ; /* is this too little? */ + if (OPEN_FMODE(oflags) & FMODE_WRITE) + desiredAccess |= GENERIC_WRITE; + + if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) + disposition = FILE_CREATE; + else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC)) + disposition = FILE_OVERWRITE_IF; + else if ((oflags & O_CREAT) == O_CREAT) + disposition = FILE_OPEN_IF; + else + cFYI(1, "Create flag not set in create function"); + } + + /* BB add processing to set equivalent of mode - e.g. via CreateX with + ACLs */ + + buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); + if (buf == NULL) { + rc = -ENOMEM; + goto cifs_create_out; + } + + /* + * if we're not using unix extensions, see if we need to set + * ATTR_READONLY on the create call + */ + if (!tcon->unix_ext && (mode & S_IWUGO) == 0) + create_options |= CREATE_OPTION_READONLY; + + if (backup_cred(cifs_sb)) + create_options |= CREATE_OPEN_BACKUP_INTENT; + + if (tcon->ses->capabilities & CAP_NT_SMBS) + 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); + 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, 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); + 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 = { + .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; + } + CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, + current->tgid); + } 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 */ + } + +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(); + } + } + } + +cifs_create_set_dentry: + if (rc == 0) + d_instantiate(direntry, newinode); + else + cFYI(1, "Create worked, get_inode_info failed rc = %d", rc); + + if (newinode && nd) { + struct cifsFileInfo *pfile_info; + 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; + } + + pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock); + if (pfile_info == NULL) { + fput(filp); + CIFSSMBClose(xid, tcon, fileHandle); + rc = -ENOMEM; + } + } else { + CIFSSMBClose(xid, tcon, fileHandle); + } + +cifs_create_out: + kfree(buf); + kfree(full_path); + cifs_put_tlink(tlink); + FreeXid(xid); + return rc; +} + +int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode, + dev_t device_number) +{ + int rc = -EPERM; + int xid; + int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL; + struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; + struct cifs_tcon *pTcon; + struct cifs_io_parms io_parms; + char *full_path = NULL; + struct inode *newinode = NULL; + int oplock = 0; + u16 fileHandle; + FILE_ALL_INFO *buf = NULL; + unsigned int bytes_written; + struct win_dev *pdev; + + if (!old_valid_dev(device_number)) + return -EINVAL; + + cifs_sb = CIFS_SB(inode->i_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + + pTcon = tlink_tcon(tlink); + + xid = GetXid(); + + full_path = build_path_from_dentry(direntry); + if (full_path == NULL) { + rc = -ENOMEM; + goto mknod_out; + } + + if (pTcon->unix_ext) { + struct cifs_unix_set_info_args args = { + .mode = mode & ~current_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) { + args.uid = (__u64) current_fsuid(); + args.gid = (__u64) current_fsgid(); + } else { + args.uid = NO_CHANGE_64; + args.gid = NO_CHANGE_64; + } + rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & + CIFS_MOUNT_MAP_SPECIAL_CHR); + if (rc) + goto mknod_out; + + rc = cifs_get_inode_info_unix(&newinode, full_path, + inode->i_sb, xid); + + if (rc == 0) + d_instantiate(direntry, newinode); + goto mknod_out; + } + + 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; + } + + if (backup_cred(cifs_sb)) + create_options |= CREATE_OPEN_BACKUP_INTENT; + + rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_CREATE, + GENERIC_WRITE, create_options, + &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; + io_parms.netfid = fileHandle; + io_parms.pid = current->tgid; + io_parms.tcon = pTcon; + io_parms.offset = 0; + io_parms.length = sizeof(struct win_dev); + 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, &io_parms, + &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, &io_parms, + &bytes_written, (char *)pdev, + NULL, 0); + } /* else if (S_ISFIFO) */ + CIFSSMBClose(xid, pTcon, fileHandle); + d_drop(direntry); + + /* FIXME: add code here to set EAs */ + +mknod_out: + kfree(full_path); + kfree(buf); + FreeXid(xid); + cifs_put_tlink(tlink); + return rc; +} + +struct dentry * +cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, + struct nameidata *nd) +{ + int xid; + int rc = 0; /* to get around spurious gcc warning, set to zero here */ + __u32 oplock; + __u16 fileHandle = 0; + bool posix_open = false; + struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; + struct cifs_tcon *pTcon; + struct cifsFileInfo *cfile; + struct inode *newInode = NULL; + char *full_path = NULL; + struct file *filp; + + xid = GetXid(); + + 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 */ + + cifs_sb = CIFS_SB(parent_dir_inode->i_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + FreeXid(xid); + return (struct dentry *)tlink; + } + pTcon = tlink_tcon(tlink); + + oplock = pTcon->ses->server->oplocks ? REQ_OPLOCK : 0; + + /* + * 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"); + rc = -EINVAL; + goto lookup_out; + } + } + + /* + * O_EXCL: optimize away the lookup, but don't hash the dentry. Let + * the VFS handle the create. + */ + if (nd && (nd->flags & LOOKUP_EXCL)) { + d_instantiate(direntry, NULL); + rc = 0; + goto lookup_out; + } + + /* 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); + if (full_path == NULL) { + rc = -ENOMEM; + goto lookup_out; + } + + if (direntry->d_inode != NULL) { + cFYI(1, "non-NULL inode in lookup"); + } else { + cFYI(1, "NULL inode in lookup"); + } + cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode); + + /* 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. + */ + if (pTcon->unix_ext) { + if (nd && !(nd->flags & LOOKUP_DIRECTORY) && + (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open && + (nd->intent.open.file->f_flags & O_CREAT)) { + rc = cifs_posix_open(full_path, &newInode, + parent_dir_inode->i_sb, + nd->intent.open.create_mode, + nd->intent.open.file->f_flags, &oplock, + &fileHandle, xid); + /* + * 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. + */ + switch (rc) { + case 0: + /* + * The server may allow us to open things like + * FIFOs, but the client isn't set up to deal + * with that. If it's not a regular file, just + * close it and proceed as if it were a normal + * lookup. + */ + if (newInode && !S_ISREG(newInode->i_mode)) { + CIFSSMBClose(xid, pTcon, fileHandle); + break; + } + case -ENOENT: + posix_open = true; + case -EOPNOTSUPP: + break; + default: + pTcon->broken_posix_open = true; + } + } + if (!posix_open) + rc = cifs_get_inode_info_unix(&newInode, full_path, + parent_dir_inode->i_sb, xid); + } else + rc = cifs_get_inode_info(&newInode, full_path, NULL, + parent_dir_inode->i_sb, xid, NULL); + + if ((rc == 0) && (newInode != NULL)) { + d_add(direntry, newInode); + if (posix_open) { + filp = lookup_instantiate_filp(nd, direntry, + generic_file_open); + if (IS_ERR(filp)) { + rc = PTR_ERR(filp); + CIFSSMBClose(xid, pTcon, fileHandle); + goto lookup_out; + } + + cfile = cifs_new_fileinfo(fileHandle, filp, tlink, + oplock); + if (cfile == NULL) { + fput(filp); + CIFSSMBClose(xid, pTcon, fileHandle); + rc = -ENOMEM; + goto lookup_out; + } + } + /* 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; + d_add(direntry, NULL); + /* if it was once a directory (but how can we tell?) we could do + shrink_dcache_parent(direntry); */ + } else if (rc != -EACCES) { + cERROR(1, "Unexpected lookup error %d", rc); + /* We special case check for Access Denied - since that + is a common return code */ + } + +lookup_out: + kfree(full_path); + cifs_put_tlink(tlink); + FreeXid(xid); + return ERR_PTR(rc); +} + +static int +cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) +{ + if (nd && (nd->flags & LOOKUP_RCU)) + return -ECHILD; + + if (direntry->d_inode) { + if (cifs_revalidate_dentry(direntry)) + return 0; + else { + /* + * If the inode wasn't known to be a dfs entry when + * the dentry was instantiated, such as when created + * via ->readdir(), it needs to be set now since the + * attributes will have been updated by + * cifs_revalidate_dentry(). + */ + if (IS_AUTOMOUNT(direntry->d_inode) && + !(direntry->d_flags & DCACHE_NEED_AUTOMOUNT)) { + spin_lock(&direntry->d_lock); + direntry->d_flags |= DCACHE_NEED_AUTOMOUNT; + spin_unlock(&direntry->d_lock); + } + + return 1; + } + } + + /* + * 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. + */ + if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) + return 0; + + if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) + return 0; + + return 1; +} + +/* static int cifs_d_delete(struct dentry *direntry) +{ + int rc = 0; + + cFYI(1, "In cifs d_delete, name = %s", direntry->d_name.name); + + return rc; +} */ + +const struct dentry_operations cifs_dentry_ops = { + .d_revalidate = cifs_d_revalidate, + .d_automount = cifs_dfs_d_automount, +/* d_delete: cifs_d_delete, */ /* not needed except for debugging */ +}; + +static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *q) +{ + struct nls_table *codepage = CIFS_SB(dentry->d_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(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) +{ + struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; + + if ((name->len == len) && + (nls_strnicmp(codepage, name->name, str, len) == 0)) + return 0; + return 1; +} + +const struct dentry_operations cifs_ci_dentry_ops = { + .d_revalidate = cifs_d_revalidate, + .d_hash = cifs_ci_hash, + .d_compare = cifs_ci_compare, + .d_automount = cifs_dfs_d_automount, +}; |