[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/cifs/cifsfs.c b/src/kernel/linux/v4.14/fs/cifs/cifsfs.c
new file mode 100644
index 0000000..c5fd5ab
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/cifs/cifsfs.c
@@ -0,0 +1,1501 @@
+/*
+ * fs/cifs/cifsfs.c
+ *
+ * Copyright (C) International Business Machines Corp., 2002,2008
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ * Common Internet FileSystem (CIFS) client
+ *
+ * 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
+ */
+
+/* Note that BB means BUGBUG (ie something to fix eventually) */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include <linux/vfs.h>
+#include <linux/mempool.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/namei.h>
+#include <linux/random.h>
+#include <linux/uuid.h>
+#include <linux/xattr.h>
+#include <net/ipv6.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#define DECLARE_GLOBALS_HERE
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include <linux/mm.h>
+#include <linux/key-type.h>
+#include "cifs_spnego.h"
+#include "fscache.h"
+#include "smb2pdu.h"
+
+int cifsFYI = 0;
+bool traceSMB;
+bool enable_oplocks = true;
+bool linuxExtEnabled = true;
+bool lookupCacheEnabled = true;
+unsigned int global_secflags = CIFSSEC_DEF;
+/* unsigned int ntlmv2_support = 0; */
+unsigned int sign_CIFS_PDUs = 1;
+static const struct super_operations cifs_super_ops;
+unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
+module_param(CIFSMaxBufSize, uint, 0444);
+MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
+ "Default: 16384 Range: 8192 to 130048");
+unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
+module_param(cifs_min_rcv, uint, 0444);
+MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
+ "1 to 64");
+unsigned int cifs_min_small = 30;
+module_param(cifs_min_small, uint, 0444);
+MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
+ "Range: 2 to 256");
+unsigned int cifs_max_pending = CIFS_MAX_REQ;
+module_param(cifs_max_pending, uint, 0444);
+MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
+ "Default: 32767 Range: 2 to 32767.");
+module_param(enable_oplocks, bool, 0644);
+MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
+
+extern mempool_t *cifs_sm_req_poolp;
+extern mempool_t *cifs_req_poolp;
+extern mempool_t *cifs_mid_poolp;
+
+struct workqueue_struct *cifsiod_wq;
+struct workqueue_struct *cifsoplockd_wq;
+__u32 cifs_lock_secret;
+
+/*
+ * Bumps refcount for cifs super block.
+ * Note that it should be only called if a referece to VFS super block is
+ * already held, e.g. in open-type syscalls context. Otherwise it can race with
+ * atomic_dec_and_test in deactivate_locked_super.
+ */
+void
+cifs_sb_active(struct super_block *sb)
+{
+ struct cifs_sb_info *server = CIFS_SB(sb);
+
+ if (atomic_inc_return(&server->active) == 1)
+ atomic_inc(&sb->s_active);
+}
+
+void
+cifs_sb_deactive(struct super_block *sb)
+{
+ struct cifs_sb_info *server = CIFS_SB(sb);
+
+ if (atomic_dec_and_test(&server->active))
+ deactivate_super(sb);
+}
+
+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;
+ rc = super_setup_bdi(sb);
+ if (rc)
+ goto out_no_root;
+ /* tune readahead according to rsize */
+ sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE;
+
+ 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;
+}
+
+static void cifs_kill_sb(struct super_block *sb)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ kill_anon_super(sb);
+ cifs_umount(cifs_sb);
+}
+
+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();
+
+ if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0)
+ buf->f_namelen =
+ le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
+ else
+ buf->f_namelen = PATH_MAX;
+
+ buf->f_fsid.val[0] = tcon->vol_serial_number;
+ /* are using part of create time for more randomness, see man statfs */
+ buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time);
+
+ 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 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;
+}
+
+static int cifs_permission(struct inode *inode, int mask)
+{
+ struct cifs_sb_info *cifs_sb;
+
+ cifs_sb = CIFS_SB(inode->i_sb);
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
+ if ((mask & MAY_EXEC) && !execute_ok(inode))
+ return -EACCES;
+ else
+ return 0;
+ } else /* file mode might have been restricted at mount time
+ on the client (above and beyond ACL on servers) for
+ servers which do not support setting and viewing mode bits,
+ so allowing client to check permissions is useful */
+ return generic_permission(inode, mask);
+}
+
+static struct kmem_cache *cifs_inode_cachep;
+static struct kmem_cache *cifs_req_cachep;
+static struct kmem_cache *cifs_mid_cachep;
+static struct kmem_cache *cifs_sm_req_cachep;
+mempool_t *cifs_sm_req_poolp;
+mempool_t *cifs_req_poolp;
+mempool_t *cifs_mid_poolp;
+
+static struct inode *
+cifs_alloc_inode(struct super_block *sb)
+{
+ struct cifsInodeInfo *cifs_inode;
+ cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
+ if (!cifs_inode)
+ return NULL;
+ cifs_inode->cifsAttrs = 0x20; /* default */
+ cifs_inode->time = 0;
+ /*
+ * Until the file is open and we have gotten oplock info back from the
+ * server, can not assume caching of file data or metadata.
+ */
+ cifs_set_oplock_level(cifs_inode, 0);
+ cifs_inode->flags = 0;
+ spin_lock_init(&cifs_inode->writers_lock);
+ cifs_inode->writers = 0;
+ cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
+ cifs_inode->server_eof = 0;
+ cifs_inode->uniqueid = 0;
+ cifs_inode->createtime = 0;
+ cifs_inode->epoch = 0;
+ generate_random_uuid(cifs_inode->lease_key);
+
+ /*
+ * Can not set i_flags here - they get immediately overwritten to zero
+ * by the VFS.
+ */
+ /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
+ INIT_LIST_HEAD(&cifs_inode->openFileList);
+ INIT_LIST_HEAD(&cifs_inode->llist);
+ return &cifs_inode->vfs_inode;
+}
+
+static void cifs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
+}
+
+static void
+cifs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, cifs_i_callback);
+}
+
+static void
+cifs_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);
+ cifs_fscache_release_inode_cookie(inode);
+}
+
+static void
+cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
+{
+ struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
+ struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
+
+ seq_puts(s, ",addr=");
+
+ switch (server->dstaddr.ss_family) {
+ case AF_INET:
+ seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
+ if (sa6->sin6_scope_id)
+ seq_printf(s, "%%%u", sa6->sin6_scope_id);
+ break;
+ default:
+ seq_puts(s, "(unknown)");
+ }
+}
+
+static void
+cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
+{
+ if (ses->sectype == Unspecified) {
+ if (ses->user_name == NULL)
+ seq_puts(s, ",sec=none");
+ return;
+ }
+
+ seq_puts(s, ",sec=");
+
+ switch (ses->sectype) {
+ case LANMAN:
+ seq_puts(s, "lanman");
+ break;
+ case NTLMv2:
+ seq_puts(s, "ntlmv2");
+ break;
+ case NTLM:
+ seq_puts(s, "ntlm");
+ break;
+ case Kerberos:
+ seq_puts(s, "krb5");
+ break;
+ case RawNTLMSSP:
+ seq_puts(s, "ntlmssp");
+ break;
+ default:
+ /* shouldn't ever happen */
+ seq_puts(s, "unknown");
+ break;
+ }
+
+ if (ses->sign)
+ seq_puts(s, "i");
+}
+
+static void
+cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
+{
+ seq_puts(s, ",cache=");
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
+ seq_puts(s, "strict");
+ else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+ seq_puts(s, "none");
+ else
+ seq_puts(s, "loose");
+}
+
+static void
+cifs_show_nls(struct seq_file *s, struct nls_table *cur)
+{
+ struct nls_table *def;
+
+ /* Display iocharset= option if it's not default charset */
+ def = load_nls_default();
+ if (def != cur)
+ seq_printf(s, ",iocharset=%s", cur->charset);
+ unload_nls(def);
+}
+
+/*
+ * 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_show_option(s, "vers", 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_show_option(s, "username", tcon->ses->user_name);
+
+ if (tcon->ses->domainName)
+ seq_show_option(s, "domain", 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");
+ else
+ seq_puts(s, ",soft");
+ if (tcon->use_persistent)
+ seq_puts(s, ",persistenthandles");
+ else if (tcon->use_resilient)
+ seq_puts(s, ",resilienthandles");
+ 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_UID_FROM_ACL)
+ seq_puts(s, ",idsfromsid");
+ 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);
+ seq_printf(s, ",echo_interval=%lu",
+ tcon->ses->server->echo_interval / HZ);
+ /* convert actimeo and display it in seconds */
+ seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
+
+ 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) {
+ cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
+ 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;
+}
+
+#ifdef CONFIG_CIFS_STATS2
+static int cifs_show_stats(struct seq_file *s, struct dentry *root)
+{
+ /* BB FIXME */
+ return 0;
+}
+#endif
+
+static int cifs_remount(struct super_block *sb, int *flags, char *data)
+{
+ sync_filesystem(sb);
+ *flags |= MS_NODIRATIME;
+ return 0;
+}
+
+static int cifs_drop_inode(struct inode *inode)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+ /* no serverino => unconditional eviction */
+ return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
+ generic_drop_inode(inode);
+}
+
+static const struct super_operations cifs_super_ops = {
+ .statfs = cifs_statfs,
+ .alloc_inode = cifs_alloc_inode,
+ .destroy_inode = cifs_destroy_inode,
+ .drop_inode = cifs_drop_inode,
+ .evict_inode = cifs_evict_inode,
+/* .delete_inode = cifs_delete_inode, */ /* Do not need above
+ function unless later we add lazy close of inodes or unless the
+ kernel forgets to call us with the same number of releases (closes)
+ as opens */
+ .show_options = cifs_show_options,
+ .umount_begin = cifs_umount_begin,
+ .remount_fs = cifs_remount,
+#ifdef CONFIG_CIFS_STATS2
+ .show_stats = cifs_show_stats,
+#endif
+};
+
+/*
+ * 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;
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH)
+ return dget(sb->s_root);
+
+ full_path = cifs_build_path_to_root(vol, cifs_sb,
+ cifs_sb_master_tcon(cifs_sb), 0);
+ if (full_path == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
+
+ sep = CIFS_DIR_SEP(cifs_sb);
+ dentry = dget(sb->s_root);
+ p = s = full_path;
+
+ do {
+ struct inode *dir = d_inode(dentry);
+ 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++;
+
+ child = lookup_one_len_unlocked(p, dentry, s - p);
+ dput(dentry);
+ dentry = child;
+ } while (!IS_ERR(dentry));
+ kfree(full_path);
+ return dentry;
+}
+
+static int cifs_set_super(struct super_block *sb, void *data)
+{
+ struct cifs_mnt_data *mnt_data = data;
+ sb->s_fs_info = mnt_data->cifs_sb;
+ return set_anon_super(sb, NULL);
+}
+
+static struct dentry *
+cifs_do_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ int rc;
+ struct super_block *sb;
+ struct cifs_sb_info *cifs_sb;
+ struct smb_vol *volume_info;
+ struct cifs_mnt_data mnt_data;
+ struct dentry *root;
+
+ cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
+
+ volume_info = cifs_get_volume_info((char *)data, dev_name);
+ if (IS_ERR(volume_info))
+ return ERR_CAST(volume_info);
+
+ cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
+ if (cifs_sb == NULL) {
+ root = ERR_PTR(-ENOMEM);
+ goto out_nls;
+ }
+
+ cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
+ if (cifs_sb->mountdata == NULL) {
+ root = ERR_PTR(-ENOMEM);
+ goto out_free;
+ }
+
+ rc = cifs_setup_cifs_sb(volume_info, cifs_sb);
+ if (rc) {
+ root = ERR_PTR(rc);
+ goto out_free;
+ }
+
+ rc = cifs_mount(cifs_sb, volume_info);
+ if (rc) {
+ if (!(flags & MS_SILENT))
+ cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
+ rc);
+ root = ERR_PTR(rc);
+ goto out_free;
+ }
+
+ mnt_data.vol = volume_info;
+ mnt_data.cifs_sb = cifs_sb;
+ mnt_data.flags = flags;
+
+ /* BB should we make this contingent on mount parm? */
+ flags |= MS_NODIRATIME | MS_NOATIME;
+
+ sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
+ if (IS_ERR(sb)) {
+ root = ERR_CAST(sb);
+ cifs_umount(cifs_sb);
+ goto out;
+ }
+
+ if (sb->s_root) {
+ cifs_dbg(FYI, "Use existing superblock\n");
+ cifs_umount(cifs_sb);
+ } else {
+ rc = cifs_read_super(sb);
+ if (rc) {
+ root = ERR_PTR(rc);
+ goto out_super;
+ }
+
+ sb->s_flags |= MS_ACTIVE;
+ }
+
+ root = cifs_get_root(volume_info, sb);
+ if (IS_ERR(root))
+ goto out_super;
+
+ cifs_dbg(FYI, "dentry root is: %p\n", root);
+ goto out;
+
+out_super:
+ deactivate_locked_super(sb);
+out:
+ cifs_cleanup_volume_info(volume_info);
+ return root;
+
+out_free:
+ kfree(cifs_sb->prepath);
+ kfree(cifs_sb->mountdata);
+ kfree(cifs_sb);
+out_nls:
+ unload_nls(volume_info->local_nls);
+ goto out;
+}
+
+static ssize_t
+cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+{
+ ssize_t rc;
+ struct inode *inode = file_inode(iocb->ki_filp);
+
+ if (iocb->ki_filp->f_flags & O_DIRECT)
+ return cifs_user_readv(iocb, iter);
+
+ rc = cifs_revalidate_mapping(inode);
+ if (rc)
+ return rc;
+
+ return generic_file_read_iter(iocb, iter);
+}
+
+static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+ struct inode *inode = file_inode(iocb->ki_filp);
+ struct cifsInodeInfo *cinode = CIFS_I(inode);
+ ssize_t written;
+ int rc;
+
+ if (iocb->ki_filp->f_flags & O_DIRECT) {
+ written = cifs_user_writev(iocb, from);
+ if (written > 0 && CIFS_CACHE_READ(cinode)) {
+ cifs_zap_mapping(inode);
+ cifs_dbg(FYI,
+ "Set no oplock for inode=%p after a write operation\n",
+ inode);
+ cinode->oplock = 0;
+ }
+ return written;
+ }
+
+ written = cifs_get_writer(cinode);
+ if (written)
+ return written;
+
+ written = generic_file_write_iter(iocb, from);
+
+ if (CIFS_CACHE_WRITE(CIFS_I(inode)))
+ goto out;
+
+ rc = filemap_fdatawrite(inode->i_mapping);
+ if (rc)
+ cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
+ rc, inode);
+
+out:
+ cifs_put_writer(cinode);
+ return written;
+}
+
+static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
+{
+ /*
+ * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+ * the cached file length
+ */
+ if (whence != SEEK_SET && whence != SEEK_CUR) {
+ int rc;
+ struct inode *inode = file_inode(file);
+
+ /*
+ * We need to be sure that all dirty pages are written and the
+ * server has the newest file length.
+ */
+ if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
+ inode->i_mapping->nrpages != 0) {
+ rc = filemap_fdatawait(inode->i_mapping);
+ if (rc) {
+ mapping_set_error(inode->i_mapping, rc);
+ return rc;
+ }
+ }
+ /*
+ * Some applications poll for the file length in this strange
+ * way so we must seek to end on non-oplocked files by
+ * setting the revalidate time to zero.
+ */
+ CIFS_I(inode)->time = 0;
+
+ rc = cifs_revalidate_file_attr(file);
+ if (rc < 0)
+ return (loff_t)rc;
+ }
+ return generic_file_llseek(file, offset, whence);
+}
+
+static int
+cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
+{
+ /*
+ * Note that this is called by vfs setlease with i_lock held to
+ * protect *lease from going away.
+ */
+ struct inode *inode = file_inode(file);
+ struct cifsFileInfo *cfile = file->private_data;
+
+ if (!(S_ISREG(inode->i_mode)))
+ return -EINVAL;
+
+ /* Check if file is oplocked if this is request for new lease */
+ if (arg == F_UNLCK ||
+ ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
+ ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
+ return generic_setlease(file, arg, lease, priv);
+ else if (tlink_tcon(cfile->tlink)->local_lease &&
+ !CIFS_CACHE_READ(CIFS_I(inode)))
+ /*
+ * If the server claims to support oplock on this file, then we
+ * still need to check oplock even if the local_lease mount
+ * option is set, but there are servers which do not support
+ * oplock for which this mount option may be useful if the user
+ * knows that the file won't be changed on the server by anyone
+ * else.
+ */
+ return generic_setlease(file, arg, lease, priv);
+ else
+ return -EAGAIN;
+}
+
+struct file_system_type cifs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "cifs",
+ .mount = cifs_do_mount,
+ .kill_sb = cifs_kill_sb,
+ /* .fs_flags */
+};
+MODULE_ALIAS_FS("cifs");
+const struct inode_operations cifs_dir_inode_ops = {
+ .create = cifs_create,
+ .atomic_open = cifs_atomic_open,
+ .lookup = cifs_lookup,
+ .getattr = cifs_getattr,
+ .unlink = cifs_unlink,
+ .link = cifs_hardlink,
+ .mkdir = cifs_mkdir,
+ .rmdir = cifs_rmdir,
+ .rename = cifs_rename2,
+ .permission = cifs_permission,
+ .setattr = cifs_setattr,
+ .symlink = cifs_symlink,
+ .mknod = cifs_mknod,
+ .listxattr = cifs_listxattr,
+};
+
+const struct inode_operations cifs_file_inode_ops = {
+ .setattr = cifs_setattr,
+ .getattr = cifs_getattr,
+ .permission = cifs_permission,
+ .listxattr = cifs_listxattr,
+};
+
+const struct inode_operations cifs_symlink_inode_ops = {
+ .get_link = cifs_get_link,
+ .permission = cifs_permission,
+ .listxattr = cifs_listxattr,
+};
+
+static int cifs_clone_file_range(struct file *src_file, loff_t off,
+ struct file *dst_file, loff_t destoff, u64 len)
+{
+ struct inode *src_inode = file_inode(src_file);
+ struct inode *target_inode = file_inode(dst_file);
+ struct cifsFileInfo *smb_file_src = src_file->private_data;
+ struct cifsFileInfo *smb_file_target;
+ struct cifs_tcon *target_tcon;
+ unsigned int xid;
+ int rc;
+
+ cifs_dbg(FYI, "clone range\n");
+
+ xid = get_xid();
+
+ if (!src_file->private_data || !dst_file->private_data) {
+ rc = -EBADF;
+ cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
+ goto out;
+ }
+
+ smb_file_target = dst_file->private_data;
+ target_tcon = tlink_tcon(smb_file_target->tlink);
+
+ /*
+ * Note: cifs case is easier than btrfs since server responsible for
+ * checks for proper open modes and file type and if it wants
+ * server could even support copy of range where source = target
+ */
+ lock_two_nondirectories(target_inode, src_inode);
+
+ if (len == 0)
+ len = src_inode->i_size - off;
+
+ cifs_dbg(FYI, "about to flush pages\n");
+ /* should we flush first and last page first */
+ truncate_inode_pages_range(&target_inode->i_data, destoff,
+ PAGE_ALIGN(destoff + len)-1);
+
+ if (target_tcon->ses->server->ops->duplicate_extents)
+ rc = target_tcon->ses->server->ops->duplicate_extents(xid,
+ smb_file_src, smb_file_target, off, len, destoff);
+ else
+ rc = -EOPNOTSUPP;
+
+ /* force revalidate of size and timestamps of target file now
+ that target is updated on the server */
+ CIFS_I(target_inode)->time = 0;
+ /* although unlocking in the reverse order from locking is not
+ strictly necessary here it is a little cleaner to be consistent */
+ unlock_two_nondirectories(src_inode, target_inode);
+out:
+ free_xid(xid);
+ return rc;
+}
+
+ssize_t cifs_file_copychunk_range(unsigned int xid,
+ struct file *src_file, loff_t off,
+ struct file *dst_file, loff_t destoff,
+ size_t len, unsigned int flags)
+{
+ struct inode *src_inode = file_inode(src_file);
+ struct inode *target_inode = file_inode(dst_file);
+ struct cifsFileInfo *smb_file_src;
+ struct cifsFileInfo *smb_file_target;
+ struct cifs_tcon *src_tcon;
+ struct cifs_tcon *target_tcon;
+ ssize_t rc;
+
+ cifs_dbg(FYI, "copychunk range\n");
+
+ if (src_inode == target_inode) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (!src_file->private_data || !dst_file->private_data) {
+ rc = -EBADF;
+ cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
+ goto out;
+ }
+
+ rc = -EXDEV;
+ smb_file_target = dst_file->private_data;
+ smb_file_src = src_file->private_data;
+ src_tcon = tlink_tcon(smb_file_src->tlink);
+ target_tcon = tlink_tcon(smb_file_target->tlink);
+
+ if (src_tcon->ses != target_tcon->ses) {
+ cifs_dbg(VFS, "source and target of copy not on same server\n");
+ goto out;
+ }
+
+ /*
+ * Note: cifs case is easier than btrfs since server responsible for
+ * checks for proper open modes and file type and if it wants
+ * server could even support copy of range where source = target
+ */
+ lock_two_nondirectories(target_inode, src_inode);
+
+ cifs_dbg(FYI, "about to flush pages\n");
+ /* should we flush first and last page first */
+ truncate_inode_pages(&target_inode->i_data, 0);
+
+ if (target_tcon->ses->server->ops->copychunk_range)
+ rc = target_tcon->ses->server->ops->copychunk_range(xid,
+ smb_file_src, smb_file_target, off, len, destoff);
+ else
+ rc = -EOPNOTSUPP;
+
+ /* force revalidate of size and timestamps of target file now
+ * that target is updated on the server
+ */
+ CIFS_I(target_inode)->time = 0;
+ /* although unlocking in the reverse order from locking is not
+ * strictly necessary here it is a little cleaner to be consistent
+ */
+ unlock_two_nondirectories(src_inode, target_inode);
+
+out:
+ return rc;
+}
+
+/*
+ * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
+ * is a dummy operation.
+ */
+static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
+ file, datasync);
+
+ return 0;
+}
+
+static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
+ struct file *dst_file, loff_t destoff,
+ size_t len, unsigned int flags)
+{
+ unsigned int xid = get_xid();
+ ssize_t rc;
+
+ rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
+ len, flags);
+ free_xid(xid);
+ return rc;
+}
+
+const struct file_operations cifs_file_ops = {
+ .read_iter = cifs_loose_read_iter,
+ .write_iter = cifs_file_write_iter,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_strict_ops = {
+ .read_iter = cifs_strict_readv,
+ .write_iter = cifs_strict_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_strict_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_strict_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_direct_ops = {
+ /* BB reevaluate whether they can be done with directio, no cache */
+ .read_iter = cifs_user_readv,
+ .write_iter = cifs_user_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .lock = cifs_lock,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .llseek = cifs_llseek,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_nobrl_ops = {
+ .read_iter = cifs_loose_read_iter,
+ .write_iter = cifs_file_write_iter,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_strict_nobrl_ops = {
+ .read_iter = cifs_strict_readv,
+ .write_iter = cifs_strict_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_strict_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_strict_mmap,
+ .splice_read = generic_file_splice_read,
+ .llseek = cifs_llseek,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_file_direct_nobrl_ops = {
+ /* BB reevaluate whether they can be done with directio, no cache */
+ .read_iter = cifs_user_readv,
+ .write_iter = cifs_user_writev,
+ .open = cifs_open,
+ .release = cifs_close,
+ .fsync = cifs_fsync,
+ .flush = cifs_flush,
+ .mmap = cifs_file_mmap,
+ .splice_read = generic_file_splice_read,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .llseek = cifs_llseek,
+ .setlease = cifs_setlease,
+ .fallocate = cifs_fallocate,
+};
+
+const struct file_operations cifs_dir_ops = {
+ .iterate_shared = cifs_readdir,
+ .release = cifs_closedir,
+ .read = generic_read_dir,
+ .unlocked_ioctl = cifs_ioctl,
+ .copy_file_range = cifs_copy_file_range,
+ .clone_file_range = cifs_clone_file_range,
+ .llseek = generic_file_llseek,
+ .fsync = cifs_dir_fsync,
+};
+
+static void
+cifs_init_once(void *inode)
+{
+ struct cifsInodeInfo *cifsi = inode;
+
+ inode_init_once(&cifsi->vfs_inode);
+ init_rwsem(&cifsi->lock_sem);
+}
+
+static int __init
+cifs_init_inodecache(void)
+{
+ cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
+ sizeof(struct cifsInodeInfo),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+ cifs_init_once);
+ if (cifs_inode_cachep == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void
+cifs_destroy_inodecache(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(cifs_inode_cachep);
+}
+
+static int
+cifs_init_request_bufs(void)
+{
+ /*
+ * SMB2 maximum header size is bigger than CIFS one - no problems to
+ * allocate some more bytes for CIFS.
+ */
+ size_t max_hdr_size = MAX_SMB2_HDR_SIZE;
+
+ if (CIFSMaxBufSize < 8192) {
+ /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
+ Unicode path name has to fit in any SMB/CIFS path based frames */
+ CIFSMaxBufSize = 8192;
+ } else if (CIFSMaxBufSize > 1024*127) {
+ CIFSMaxBufSize = 1024 * 127;
+ } else {
+ CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
+ }
+/*
+ cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
+ CIFSMaxBufSize, CIFSMaxBufSize);
+*/
+ cifs_req_cachep = kmem_cache_create("cifs_request",
+ CIFSMaxBufSize + max_hdr_size, 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (cifs_req_cachep == NULL)
+ return -ENOMEM;
+
+ if (cifs_min_rcv < 1)
+ cifs_min_rcv = 1;
+ else if (cifs_min_rcv > 64) {
+ cifs_min_rcv = 64;
+ cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
+ }
+
+ cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
+ cifs_req_cachep);
+
+ if (cifs_req_poolp == NULL) {
+ kmem_cache_destroy(cifs_req_cachep);
+ return -ENOMEM;
+ }
+ /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
+ almost all handle based requests (but not write response, nor is it
+ sufficient for path based requests). A smaller size would have
+ been more efficient (compacting multiple slab items on one 4k page)
+ for the case in which debug was on, but this larger size allows
+ more SMBs to use small buffer alloc and is still much more
+ efficient to alloc 1 per page off the slab compared to 17K (5page)
+ alloc of large cifs buffers even when page debugging is on */
+ cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
+ MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
+ NULL);
+ if (cifs_sm_req_cachep == NULL) {
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ return -ENOMEM;
+ }
+
+ if (cifs_min_small < 2)
+ cifs_min_small = 2;
+ else if (cifs_min_small > 256) {
+ cifs_min_small = 256;
+ cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
+ }
+
+ cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
+ cifs_sm_req_cachep);
+
+ if (cifs_sm_req_poolp == NULL) {
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ kmem_cache_destroy(cifs_sm_req_cachep);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void
+cifs_destroy_request_bufs(void)
+{
+ mempool_destroy(cifs_req_poolp);
+ kmem_cache_destroy(cifs_req_cachep);
+ mempool_destroy(cifs_sm_req_poolp);
+ kmem_cache_destroy(cifs_sm_req_cachep);
+}
+
+static int
+cifs_init_mids(void)
+{
+ cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
+ sizeof(struct mid_q_entry), 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (cifs_mid_cachep == NULL)
+ return -ENOMEM;
+
+ /* 3 is a reasonable minimum number of simultaneous operations */
+ cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
+ if (cifs_mid_poolp == NULL) {
+ kmem_cache_destroy(cifs_mid_cachep);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void
+cifs_destroy_mids(void)
+{
+ mempool_destroy(cifs_mid_poolp);
+ kmem_cache_destroy(cifs_mid_cachep);
+}
+
+static int __init
+init_cifs(void)
+{
+ int rc = 0;
+ cifs_proc_init();
+ INIT_LIST_HEAD(&cifs_tcp_ses_list);
+#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
+ INIT_LIST_HEAD(&GlobalDnotifyReqList);
+ INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
+#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
+/*
+ * Initialize Global counters
+ */
+ atomic_set(&sesInfoAllocCount, 0);
+ atomic_set(&tconInfoAllocCount, 0);
+ atomic_set(&tcpSesAllocCount, 0);
+ atomic_set(&tcpSesReconnectCount, 0);
+ atomic_set(&tconInfoReconnectCount, 0);
+
+ atomic_set(&bufAllocCount, 0);
+ atomic_set(&smBufAllocCount, 0);
+#ifdef CONFIG_CIFS_STATS2
+ atomic_set(&totBufAllocCount, 0);
+ atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+
+ atomic_set(&midCount, 0);
+ GlobalCurrentXid = 0;
+ GlobalTotalActiveXid = 0;
+ GlobalMaxActiveXid = 0;
+ spin_lock_init(&cifs_tcp_ses_lock);
+ spin_lock_init(&GlobalMid_Lock);
+
+ cifs_lock_secret = get_random_u32();
+
+ if (cifs_max_pending < 2) {
+ cifs_max_pending = 2;
+ cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
+ } else if (cifs_max_pending > CIFS_MAX_REQ) {
+ cifs_max_pending = CIFS_MAX_REQ;
+ cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
+ CIFS_MAX_REQ);
+ }
+
+ cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+ if (!cifsiod_wq) {
+ rc = -ENOMEM;
+ goto out_clean_proc;
+ }
+
+ cifsoplockd_wq = alloc_workqueue("cifsoplockd",
+ WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
+ if (!cifsoplockd_wq) {
+ rc = -ENOMEM;
+ goto out_destroy_cifsiod_wq;
+ }
+
+ rc = cifs_fscache_register();
+ if (rc)
+ goto out_destroy_cifsoplockd_wq;
+
+ rc = cifs_init_inodecache();
+ if (rc)
+ goto out_unreg_fscache;
+
+ rc = cifs_init_mids();
+ if (rc)
+ goto out_destroy_inodecache;
+
+ rc = cifs_init_request_bufs();
+ if (rc)
+ goto out_destroy_mids;
+
+#ifdef CONFIG_CIFS_UPCALL
+ rc = init_cifs_spnego();
+ if (rc)
+ goto out_destroy_request_bufs;
+#endif /* CONFIG_CIFS_UPCALL */
+
+#ifdef CONFIG_CIFS_ACL
+ rc = init_cifs_idmap();
+ if (rc)
+ goto out_register_key_type;
+#endif /* CONFIG_CIFS_ACL */
+
+ rc = register_filesystem(&cifs_fs_type);
+ if (rc)
+ goto out_init_cifs_idmap;
+
+ return 0;
+
+out_init_cifs_idmap:
+#ifdef CONFIG_CIFS_ACL
+ exit_cifs_idmap();
+out_register_key_type:
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ exit_cifs_spnego();
+out_destroy_request_bufs:
+#endif
+ cifs_destroy_request_bufs();
+out_destroy_mids:
+ cifs_destroy_mids();
+out_destroy_inodecache:
+ cifs_destroy_inodecache();
+out_unreg_fscache:
+ cifs_fscache_unregister();
+out_destroy_cifsoplockd_wq:
+ destroy_workqueue(cifsoplockd_wq);
+out_destroy_cifsiod_wq:
+ destroy_workqueue(cifsiod_wq);
+out_clean_proc:
+ cifs_proc_clean();
+ return rc;
+}
+
+static void __exit
+exit_cifs(void)
+{
+ cifs_dbg(NOISY, "exit_cifs\n");
+ unregister_filesystem(&cifs_fs_type);
+ cifs_dfs_release_automount_timer();
+#ifdef CONFIG_CIFS_ACL
+ exit_cifs_idmap();
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ exit_cifs_spnego();
+#endif
+ cifs_destroy_request_bufs();
+ cifs_destroy_mids();
+ cifs_destroy_inodecache();
+ cifs_fscache_unregister();
+ destroy_workqueue(cifsoplockd_wq);
+ destroy_workqueue(cifsiod_wq);
+ cifs_proc_clean();
+}
+
+MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
+MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
+MODULE_DESCRIPTION
+ ("VFS to access servers complying with the SNIA CIFS Specification "
+ "e.g. Samba and Windows");
+MODULE_VERSION(CIFS_VERSION);
+MODULE_SOFTDEP("pre: arc4");
+MODULE_SOFTDEP("pre: des");
+MODULE_SOFTDEP("pre: ecb");
+MODULE_SOFTDEP("pre: hmac");
+MODULE_SOFTDEP("pre: md4");
+MODULE_SOFTDEP("pre: md5");
+MODULE_SOFTDEP("pre: nls");
+MODULE_SOFTDEP("pre: aes");
+MODULE_SOFTDEP("pre: cmac");
+MODULE_SOFTDEP("pre: sha256");
+MODULE_SOFTDEP("pre: sha512");
+MODULE_SOFTDEP("pre: aead2");
+MODULE_SOFTDEP("pre: ccm");
+module_init(init_cifs)
+module_exit(exit_cifs)