static int cifs_read_super(struct super_block *sb) { struct inode *inode; struct cifs_sb_info *cifs_sb; int rc = 0; cifs_sb = CIFS_SB(sb); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) sb->s_flags |= MS_POSIXACL; if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) sb->s_maxbytes = MAX_LFS_FILESIZE; else sb->s_maxbytes = MAX_NON_LFS; /* BB FIXME fix time_gran to be larger for LANMAN sessions */ sb->s_time_gran = 100; sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; sb->s_bdi = &cifs_sb->bdi; sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ inode = cifs_root_iget(sb); if (IS_ERR(inode)) { rc = PTR_ERR(inode); goto out_no_root; } sb->s_root = d_make_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; } /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ if (cifs_sb_master_tcon(cifs_sb)->nocase) sb->s_d_op = &cifs_ci_dentry_ops; else sb->s_d_op = &cifs_dentry_ops; #ifdef CONFIG_CIFS_NFSD_EXPORT if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { cFYI(1, "export ops supported"); sb->s_export_op = &cifs_export_ops; } #endif /* CONFIG_CIFS_NFSD_EXPORT */ return 0; out_no_root: cERROR(1, "cifs_read_super: get root inode failed"); return rc; }
static int cifs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct TCP_Server_Info *server = tcon->ses->server; unsigned int xid; int rc = 0; xid = get_xid(); /* * PATH_MAX may be too long - it would presumably be total path, * but note that some servers (includinng Samba 3) have a shorter * maximum path. * * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. */ buf->f_namelen = PATH_MAX; buf->f_files = 0; /* undefined */ buf->f_ffree = 0; /* unlimited */ if (server->ops->queryfs) rc = server->ops->queryfs(xid, tcon, buf); free_xid(xid); return 0; }
static void cifs_umount_begin(struct super_block *sb) { struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_tcon *tcon; if (cifs_sb == NULL) return; tcon = cifs_sb_master_tcon(cifs_sb); spin_lock(&cifs_tcp_ses_lock); if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { /* we have other mounts to same share or we have already tried to force umount this and woken up all waiting network requests, nothing to do */ spin_unlock(&cifs_tcp_ses_lock); return; } else if (tcon->tc_count == 1) tcon->tidStatus = CifsExiting; spin_unlock(&cifs_tcp_ses_lock); /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ /* cancel_notify_requests(tcon); */ if (tcon->ses && tcon->ses->server) { cFYI(1, "wake up tasks now - umount begin not complete"); wake_up_all(&tcon->ses->server->request_q); wake_up_all(&tcon->ses->server->response_q); msleep(1); /* yield */ /* we have to kick the requests once more */ wake_up_all(&tcon->ses->server->response_q); msleep(1); } return; }
static int cifs_read_super(struct super_block *sb) { struct inode *inode; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; int rc = 0; cifs_sb = CIFS_SB(sb); tcon = cifs_sb_master_tcon(cifs_sb); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) sb->s_flags |= MS_POSIXACL; if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) sb->s_maxbytes = MAX_LFS_FILESIZE; else sb->s_maxbytes = MAX_NON_LFS; /* BB FIXME fix time_gran to be larger for LANMAN sessions */ sb->s_time_gran = 100; sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; sb->s_xattr = cifs_xattr_handlers; sb->s_bdi = &cifs_sb->bdi; sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ inode = cifs_root_iget(sb); if (IS_ERR(inode)) { rc = PTR_ERR(inode); goto out_no_root; } if (tcon->nocase) sb->s_d_op = &cifs_ci_dentry_ops; else sb->s_d_op = &cifs_dentry_ops; sb->s_root = d_make_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; } #ifdef CONFIG_CIFS_NFSD_EXPORT if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { cifs_dbg(FYI, "export ops supported\n"); sb->s_export_op = &cifs_export_ops; } #endif /* CONFIG_CIFS_NFSD_EXPORT */ return 0; out_no_root: cifs_dbg(VFS, "%s: get root inode failed\n", __func__); return rc; }
/* * Get root dentry from superblock according to prefix path mount option. * Return dentry with refcount + 1 on success and NULL otherwise. */ static struct dentry * cifs_get_root(struct smb_vol *vol, struct super_block *sb) { struct dentry *dentry; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); char *full_path = NULL; char *s, *p; char sep; int xid; full_path = cifs_build_path_to_root(vol, cifs_sb, cifs_sb_master_tcon(cifs_sb)); if (full_path == NULL) return ERR_PTR(-ENOMEM); cFYI(1, "Get root dentry for %s", full_path); xid = GetXid(); sep = CIFS_DIR_SEP(cifs_sb); dentry = dget(sb->s_root); p = s = full_path; do { struct inode *dir = dentry->d_inode; struct dentry *child; if (!dir) { dput(dentry); dentry = ERR_PTR(-ENOENT); break; } if (!S_ISDIR(dir->i_mode)) { dput(dentry); dentry = ERR_PTR(-ENOTDIR); break; } /* skip separators */ while (*s == sep) s++; if (!*s) break; p = s++; /* next separator */ while (*s && *s != sep) s++; mutex_lock(&dir->i_mutex); child = lookup_one_len(p, dentry, s - p); mutex_unlock(&dir->i_mutex); dput(dentry); dentry = child; } while (!IS_ERR(dentry)); _FreeXid(xid); kfree(full_path); return dentry; }
/* * Is it possible that this directory might turn out to be a DFS referral * once we go to try and use it? */ static bool cifs_dfs_is_possible(struct cifs_sb_info *cifs_sb) { #ifdef CONFIG_CIFS_DFS_UPCALL struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); if (tcon->Flags & SMB_SHARE_IS_IN_DFS) return true; #endif return false; }
static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len) { struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct TCP_Server_Info *server = tcon->ses->server; if (server->ops->fallocate) return server->ops->fallocate(file, tcon, mode, off, len); return -EOPNOTSUPP; }
/* 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; <<<<<<< HEAD
static int cifs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); int rc = -EOPNOTSUPP; int xid; xid = GetXid(); buf->f_type = CIFS_MAGIC_NUMBER; /* * PATH_MAX may be too long - it would presumably be total path, * but note that some servers (includinng Samba 3) have a shorter * maximum path. * * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. */ buf->f_namelen = PATH_MAX; buf->f_files = 0; /* undefined */ buf->f_ffree = 0; /* unlimited */ /* * We could add a second check for a QFS Unix capability bit */ if ((tcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); /* * Only need to call the old QFSInfo if failed on newer one, * e.g. by OS/2. **/ if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) rc = CIFSSMBQFSInfo(xid, tcon, buf); /* * Some old Windows servers also do not support level 103, retry with * older level one if old server failed the previous call or we * bypassed it because we detected that this was an older LANMAN sess */ if (rc) rc = SMBOldQFSInfo(xid, tcon, buf); FreeXid(xid); return 0; }
static void cifs_fscache_enable_inode_cookie(struct inode *inode) { struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); if (cifsi->fscache) return; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) { cifsi->fscache = fscache_acquire_cookie(tcon->fscache, &cifs_fscache_inode_object_def, cifsi); cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)", tcon->fscache, cifsi->fscache); } }
void cifs_fscache_reset_inode_cookie(struct inode *inode) { struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct fscache_cookie *old = cifsi->fscache; if (cifsi->fscache) { /* retire the current fscache cache and get a new one */ fscache_relinquish_cookie(cifsi->fscache, 1); cifsi->fscache = fscache_acquire_cookie( cifs_sb_master_tcon(cifs_sb)->fscache, &cifs_fscache_inode_object_def, cifsi); cFYI(1, "CIFS: new cookie 0x%p oldcookie 0x%p", cifsi->fscache, old); } }
static void cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info, struct cifs_sb_info *cifs_sb) { int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj; memset(fattr, 0, sizeof(*fattr)); fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate, info->LastAccessTime, offset); fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate, info->LastWriteTime, offset); fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate, info->LastWriteTime, offset); fattr->cf_cifsattrs = le16_to_cpu(info->Attributes); fattr->cf_bytes = le32_to_cpu(info->AllocationSize); fattr->cf_eof = le32_to_cpu(info->DataSize); cifs_fill_common_info(fattr, cifs_sb); }
static long cifs_ioctl_query_info(unsigned int xid, struct file *filep, unsigned long p) { struct inode *inode = file_inode(filep); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct dentry *dentry = filep->f_path.dentry; unsigned char *path; __le16 *utf16_path = NULL, root_path; int rc = 0; path = build_path_from_dentry(dentry); if (path == NULL) return -ENOMEM; cifs_dbg(FYI, "%s %s\n", __func__, path); if (!path[0]) { root_path = 0; utf16_path = &root_path; } else { utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb); if (!utf16_path) { rc = -ENOMEM; goto ici_exit; } } if (tcon->ses->server->ops->ioctl_query_info) rc = tcon->ses->server->ops->ioctl_query_info( xid, tcon, utf16_path, filep->private_data ? 0 : 1, p); else rc = -EOPNOTSUPP; ici_exit: if (utf16_path != &root_path) kfree(utf16_path); kfree(path); return rc; }
/* * cifs_show_options() is for displaying mount options in /proc/mounts. * Not all settable options are displayed but most of the important * ones are. */ static int cifs_show_options(struct seq_file *s, struct vfsmount *m) { struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct sockaddr *srcaddr; srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; cifs_show_security(s, tcon->ses->server); seq_printf(s, ",unc=%s", tcon->treeName); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) seq_printf(s, ",multiuser"); else if (tcon->ses->user_name) seq_printf(s, ",username=%s", tcon->ses->user_name); if (tcon->ses->domainName) seq_printf(s, ",domain=%s", tcon->ses->domainName); if (srcaddr->sa_family != AF_UNSPEC) { struct sockaddr_in *saddr4; struct sockaddr_in6 *saddr6; saddr4 = (struct sockaddr_in *)srcaddr; saddr6 = (struct sockaddr_in6 *)srcaddr; if (srcaddr->sa_family == AF_INET6) seq_printf(s, ",srcaddr=%pI6c", &saddr6->sin6_addr); else if (srcaddr->sa_family == AF_INET) seq_printf(s, ",srcaddr=%pI4", &saddr4->sin_addr.s_addr); else seq_printf(s, ",srcaddr=BAD-AF:%i", (int)(srcaddr->sa_family)); } seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) seq_printf(s, ",forceuid"); else seq_printf(s, ",noforceuid"); seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) seq_printf(s, ",forcegid"); else seq_printf(s, ",noforcegid"); cifs_show_address(s, tcon->ses->server); if (!tcon->unix_ext) seq_printf(s, ",file_mode=0%o,dir_mode=0%o", cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); if (tcon->seal) seq_printf(s, ",seal"); if (tcon->nocase) seq_printf(s, ",nocase"); if (tcon->retry) seq_printf(s, ",hard"); if (tcon->unix_ext) seq_printf(s, ",unix"); else seq_printf(s, ",nounix"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) seq_printf(s, ",posixpaths"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) seq_printf(s, ",setuids"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) seq_printf(s, ",serverino"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) seq_printf(s, ",rwpidforward"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) seq_printf(s, ",forcemand"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) seq_printf(s, ",directio"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) seq_printf(s, ",nouser_xattr"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) seq_printf(s, ",mapchars"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) seq_printf(s, ",sfu"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) seq_printf(s, ",nobrl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) seq_printf(s, ",cifsacl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) seq_printf(s, ",dynperm"); if (m->mnt_sb->s_flags & MS_POSIXACL) seq_printf(s, ",acl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) seq_printf(s, ",mfsymlinks"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) seq_printf(s, ",fsc"); seq_printf(s, ",rsize=%d", cifs_sb->rsize); seq_printf(s, ",wsize=%d", cifs_sb->wsize); /* convert actimeo and display it in seconds */ seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); return 0; }
static int cifs_read_super(struct super_block *sb, struct smb_vol *volume_info, const char *devname, int silent) { struct inode *inode; struct cifs_sb_info *cifs_sb; int rc = 0; cifs_sb = CIFS_SB(sb); spin_lock_init(&cifs_sb->tlink_tree_lock); cifs_sb->tlink_tree = RB_ROOT; rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); if (rc) return rc; cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages; rc = cifs_mount(sb, cifs_sb, volume_info, devname); if (rc) { if (!silent) cERROR(1, "cifs_mount failed w/return code = %d", rc); goto out_mount_failed; } sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; sb->s_bdi = &cifs_sb->bdi; sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ inode = cifs_root_iget(sb); if (IS_ERR(inode)) { rc = PTR_ERR(inode); inode = NULL; goto out_no_root; } sb->s_root = d_alloc_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; } /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ if (cifs_sb_master_tcon(cifs_sb)->nocase) sb->s_d_op = &cifs_ci_dentry_ops; else sb->s_d_op = &cifs_dentry_ops; #ifdef CIFS_NFSD_EXPORT if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { cFYI(1, "export ops supported"); sb->s_export_op = &cifs_export_ops; } #endif /* CIFS_NFSD_EXPORT */ return 0; out_no_root: cERROR(1, "cifs_read_super: get root inode failed"); if (inode) iput(inode); cifs_umount(sb, cifs_sb); out_mount_failed: bdi_destroy(&cifs_sb->bdi); return rc; }
/* Note: caller must free return buffer */ char * build_path_from_dentry(struct dentry *direntry) { struct dentry *temp; int namelen; int dfsplen; int pplen = 0; 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; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) pplen = cifs_sb->prepath ? strlen(cifs_sb->prepath) + 1 : 0; cifs_bp_rename_retry: namelen = dfsplen + pplen; 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) { cifs_dbg(VFS, "corrupt dentry\n"); 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); cifs_dbg(FYI, "name: %s\n", full_path + namelen); } spin_unlock(&temp->d_lock); temp = temp->d_parent; if (temp == NULL) { cifs_dbg(VFS, "corrupt dentry\n"); rcu_read_unlock(); kfree(full_path); return NULL; } } rcu_read_unlock(); if (namelen != dfsplen + pplen || read_seqretry(&rename_lock, seq)) { cifs_dbg(FYI, "did not end path lookup where expected. namelen=%ddfsplen=%d\n", 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 (pplen) { int i; cifs_dbg(FYI, "using cifs_sb prepath <%s>\n", cifs_sb->prepath); memcpy(full_path+dfsplen+1, cifs_sb->prepath, pplen-1); full_path[dfsplen] = '\\'; for (i = 0; i < pplen-1; i++) if (full_path[dfsplen+1+i] == '/') full_path[dfsplen+1+i] = CIFS_DIR_SEP(cifs_sb); } 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; }
static int cifs_read_super(struct super_block *sb, void *data, const char *devname, int silent) { struct inode *inode; struct cifs_sb_info *cifs_sb; int rc = 0; /* BB should we make this contingent on mount parm? */ sb->s_flags |= MS_NODIRATIME | MS_NOATIME; sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); cifs_sb = CIFS_SB(sb); if (cifs_sb == NULL) return -ENOMEM; spin_lock_init(&cifs_sb->tlink_tree_lock); cifs_sb->tlink_tree = RB_ROOT; rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); if (rc) { kfree(cifs_sb); return rc; } cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages; #ifdef CONFIG_CIFS_DFS_UPCALL /* copy mount params to sb for use in submounts */ /* BB: should we move this after the mount so we * do not have to do the copy on failed mounts? * BB: May be it is better to do simple copy before * complex operation (mount), and in case of fail * just exit instead of doing mount and attempting * undo it if this copy fails?*/ if (data) { int len = strlen(data); cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); if (cifs_sb->mountdata == NULL) { bdi_destroy(&cifs_sb->bdi); kfree(sb->s_fs_info); sb->s_fs_info = NULL; return -ENOMEM; } strncpy(cifs_sb->mountdata, data, len + 1); cifs_sb->mountdata[len] = '\0'; } #endif rc = cifs_mount(sb, cifs_sb, data, devname); if (rc) { if (!silent) cERROR(1, "cifs_mount failed w/return code = %d", rc); goto out_mount_failed; } sb->s_magic = CIFS_MAGIC_NUMBER; sb->s_op = &cifs_super_ops; sb->s_bdi = &cifs_sb->bdi; sb->s_blocksize = CIFS_MAX_MSGSIZE; sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ inode = cifs_root_iget(sb, ROOT_I); if (IS_ERR(inode)) { rc = PTR_ERR(inode); inode = NULL; goto out_no_root; } sb->s_root = d_alloc_root(inode); if (!sb->s_root) { rc = -ENOMEM; goto out_no_root; } /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ if (cifs_sb_master_tcon(cifs_sb)->nocase) sb->s_d_op = &cifs_ci_dentry_ops; else sb->s_d_op = &cifs_dentry_ops; #ifdef CONFIG_CIFS_EXPERIMENTAL if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { cFYI(1, "export ops supported"); sb->s_export_op = &cifs_export_ops; } #endif /* EXPERIMENTAL */ return 0; out_no_root: cERROR(1, "cifs_read_super: get root inode failed"); if (inode) iput(inode); cifs_umount(sb, cifs_sb); out_mount_failed: if (cifs_sb) { #ifdef CONFIG_CIFS_DFS_UPCALL if (cifs_sb->mountdata) { kfree(cifs_sb->mountdata); cifs_sb->mountdata = NULL; } #endif unload_nls(cifs_sb->local_nls); bdi_destroy(&cifs_sb->bdi); kfree(cifs_sb); } return rc; }
/* 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); 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); 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; 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+1, GFP_KERNEL); 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] = dirsep; 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 != dfsplen) { cERROR(1, "did not end path lookup where expected namelen is %d", namelen); /* 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; }
/* * Get root dentry from superblock according to prefix path mount option. * Return dentry with refcount + 1 on success and NULL otherwise. */ static struct dentry * cifs_get_root(struct smb_vol *vol, struct super_block *sb) { int xid, rc; struct inode *inode; struct qstr name; struct dentry *dparent = NULL, *dchild = NULL, *alias; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); unsigned int i, full_len, len; char *full_path = NULL, *pstart; char sep; full_path = cifs_build_path_to_root(vol, cifs_sb, cifs_sb_master_tcon(cifs_sb)); if (full_path == NULL) return NULL; cFYI(1, "Get root dentry for %s", full_path); xid = GetXid(); sep = CIFS_DIR_SEP(cifs_sb); dparent = dget(sb->s_root); full_len = strlen(full_path); full_path[full_len] = sep; pstart = full_path + 1; for (i = 1, len = 0; i <= full_len; i++) { if (full_path[i] != sep || !len) { len++; continue; } full_path[i] = 0; cFYI(1, "get dentry for %s", pstart); name.name = pstart; name.len = len; name.hash = full_name_hash(pstart, len); dchild = d_lookup(dparent, &name); if (dchild == NULL) { cFYI(1, "not exists"); dchild = d_alloc(dparent, &name); if (dchild == NULL) { dput(dparent); dparent = NULL; goto out; } } cFYI(1, "get inode"); if (dchild->d_inode == NULL) { cFYI(1, "not exists"); inode = NULL; if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); else rc = cifs_get_inode_info(&inode, full_path, NULL, sb, xid, NULL); if (rc) { dput(dchild); dput(dparent); dparent = NULL; goto out; } alias = d_materialise_unique(dchild, inode); if (alias != NULL) { dput(dchild); if (IS_ERR(alias)) { dput(dparent); dparent = NULL; goto out; } dchild = alias; } } cFYI(1, "parent %p, child %p", dparent, dchild); dput(dparent); dparent = dchild; len = 0; pstart = full_path + i + 1; full_path[i] = sep; } out: _FreeXid(xid); kfree(full_path); return dparent; }
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; <<<<<<< HEAD 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; ======= int pplen; int dfsplen; char *full_path; char dirsep; struct cifs_sb_info *cifs_sb; >>>>>>> 296c66da8a02d52243f45b80521febece5ed498a 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 */ <<<<<<< HEAD
/* * cifs_show_options() is for displaying mount options in /proc/mounts. * Not all settable options are displayed but most of the important * ones are. */ static int cifs_show_options(struct seq_file *s, struct dentry *root) { struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); struct sockaddr *srcaddr; srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); cifs_show_security(s, tcon->ses); cifs_show_cache_flavor(s, cifs_sb); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) seq_puts(s, ",multiuser"); else if (tcon->ses->user_name) seq_printf(s, ",username=%s", tcon->ses->user_name); if (tcon->ses->domainName) seq_printf(s, ",domain=%s", tcon->ses->domainName); if (srcaddr->sa_family != AF_UNSPEC) { struct sockaddr_in *saddr4; struct sockaddr_in6 *saddr6; saddr4 = (struct sockaddr_in *)srcaddr; saddr6 = (struct sockaddr_in6 *)srcaddr; if (srcaddr->sa_family == AF_INET6) seq_printf(s, ",srcaddr=%pI6c", &saddr6->sin6_addr); else if (srcaddr->sa_family == AF_INET) seq_printf(s, ",srcaddr=%pI4", &saddr4->sin_addr.s_addr); else seq_printf(s, ",srcaddr=BAD-AF:%i", (int)(srcaddr->sa_family)); } seq_printf(s, ",uid=%u", from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) seq_puts(s, ",forceuid"); else seq_puts(s, ",noforceuid"); seq_printf(s, ",gid=%u", from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) seq_puts(s, ",forcegid"); else seq_puts(s, ",noforcegid"); cifs_show_address(s, tcon->ses->server); if (!tcon->unix_ext) seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); cifs_show_nls(s, cifs_sb->local_nls); if (tcon->seal) seq_puts(s, ",seal"); if (tcon->nocase) seq_puts(s, ",nocase"); if (tcon->retry) seq_puts(s, ",hard"); if (tcon->unix_ext) seq_puts(s, ",unix"); else seq_puts(s, ",nounix"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) seq_puts(s, ",posixpaths"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) seq_puts(s, ",setuids"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) seq_puts(s, ",serverino"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) seq_puts(s, ",rwpidforward"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) seq_puts(s, ",forcemand"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) seq_puts(s, ",nouser_xattr"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) seq_puts(s, ",mapchars"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) seq_puts(s, ",mapposix"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) seq_puts(s, ",sfu"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) seq_puts(s, ",nobrl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) seq_puts(s, ",cifsacl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) seq_puts(s, ",dynperm"); if (root->d_sb->s_flags & MS_POSIXACL) seq_puts(s, ",acl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) seq_puts(s, ",mfsymlinks"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) seq_puts(s, ",fsc"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) seq_puts(s, ",nostrictsync"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) seq_puts(s, ",noperm"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) seq_printf(s, ",backupuid=%u", from_kuid_munged(&init_user_ns, cifs_sb->mnt_backupuid)); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) seq_printf(s, ",backupgid=%u", from_kgid_munged(&init_user_ns, cifs_sb->mnt_backupgid)); seq_printf(s, ",rsize=%u", cifs_sb->rsize); seq_printf(s, ",wsize=%u", cifs_sb->wsize); /* convert actimeo and display it in seconds */ seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); return 0; }