mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
5970e15dbc
The file locking definitions have lived in fs.h since the dawn of time, but they are only used by a small subset of the source files that include it. Move the file locking definitions to a new header file, and add the appropriate #include directives to the source files that need them. By doing this we trim down fs.h a bit and limit the amount of rebuilding that has to be done when we make changes to the file locking APIs. Reviewed-by: Xiubo Li <xiubli@redhat.com> Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Howells <dhowells@redhat.com> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Acked-by: Chuck Lever <chuck.lever@oracle.com> Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com> Acked-by: Steve French <stfrench@microsoft.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Jeff Layton <jlayton@kernel.org>
1837 lines
49 KiB
C
1837 lines
49 KiB
C
// SPDX-License-Identifier: LGPL-2.1
|
|
/*
|
|
*
|
|
* Copyright (C) International Business Machines Corp., 2002,2008
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
* Common Internet FileSystem (CIFS) client
|
|
*
|
|
*/
|
|
|
|
/* Note that BB means BUGBUG (ie something to fix eventually) */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/filelock.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 <uapi/linux/magic.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"
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
#include "dfs_cache.h"
|
|
#endif
|
|
#ifdef CONFIG_CIFS_SWN_UPCALL
|
|
#include "netlink.h"
|
|
#endif
|
|
#include "fs_context.h"
|
|
#include "cached_dir.h"
|
|
|
|
/*
|
|
* DOS dates from 1980/1/1 through 2107/12/31
|
|
* Protocol specifications indicate the range should be to 119, which
|
|
* limits maximum year to 2099. But this range has not been checked.
|
|
*/
|
|
#define SMB_DATE_MAX (127<<9 | 12<<5 | 31)
|
|
#define SMB_DATE_MIN (0<<9 | 1<<5 | 1)
|
|
#define SMB_TIME_MAX (23<<11 | 59<<5 | 29)
|
|
|
|
int cifsFYI = 0;
|
|
bool traceSMB;
|
|
bool enable_oplocks = true;
|
|
bool linuxExtEnabled = true;
|
|
bool lookupCacheEnabled = true;
|
|
bool disable_legacy_dialects; /* false by default */
|
|
bool enable_gcm_256 = true;
|
|
bool require_gcm_256; /* false by default */
|
|
bool enable_negotiate_signing; /* false by default */
|
|
unsigned int global_secflags = CIFSSEC_DEF;
|
|
/* unsigned int ntlmv2_support = 0; */
|
|
unsigned int sign_CIFS_PDUs = 1;
|
|
|
|
/*
|
|
* Global transaction id (XID) information
|
|
*/
|
|
unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
|
|
unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
|
|
unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
|
|
spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
|
|
|
|
/*
|
|
* Global counters, updated atomically
|
|
*/
|
|
atomic_t sesInfoAllocCount;
|
|
atomic_t tconInfoAllocCount;
|
|
atomic_t tcpSesNextId;
|
|
atomic_t tcpSesAllocCount;
|
|
atomic_t tcpSesReconnectCount;
|
|
atomic_t tconInfoReconnectCount;
|
|
|
|
atomic_t mid_count;
|
|
atomic_t buf_alloc_count;
|
|
atomic_t small_buf_alloc_count;
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
atomic_t total_buf_alloc_count;
|
|
atomic_t total_small_buf_alloc_count;
|
|
#endif/* STATS2 */
|
|
struct list_head cifs_tcp_ses_list;
|
|
spinlock_t cifs_tcp_ses_lock;
|
|
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) "
|
|
"for CIFS requests. "
|
|
"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 for "
|
|
"CIFS/SMB1 dialect (N/A for SMB3) "
|
|
"Default: 32767 Range: 2 to 32767.");
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
unsigned int slow_rsp_threshold = 1;
|
|
module_param(slow_rsp_threshold, uint, 0644);
|
|
MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait "
|
|
"before logging that a response is delayed. "
|
|
"Default: 1 (if set to 0 disables msg).");
|
|
#endif /* STATS2 */
|
|
|
|
module_param(enable_oplocks, bool, 0644);
|
|
MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
|
|
|
|
module_param(enable_gcm_256, bool, 0644);
|
|
MODULE_PARM_DESC(enable_gcm_256, "Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0");
|
|
|
|
module_param(require_gcm_256, bool, 0644);
|
|
MODULE_PARM_DESC(require_gcm_256, "Require strongest (256 bit) GCM encryption. Default: n/N/0");
|
|
|
|
module_param(enable_negotiate_signing, bool, 0644);
|
|
MODULE_PARM_DESC(enable_negotiate_signing, "Enable negotiating packet signing algorithm with server. Default: n/N/0");
|
|
|
|
module_param(disable_legacy_dialects, bool, 0644);
|
|
MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be "
|
|
"helpful to restrict the ability to "
|
|
"override the default dialects (SMB2.1, "
|
|
"SMB3 and SMB3.02) on mount with old "
|
|
"dialects (CIFS/SMB1 and SMB2) since "
|
|
"vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker"
|
|
" and less secure. Default: n/N/0");
|
|
|
|
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 *decrypt_wq;
|
|
struct workqueue_struct *fileinfo_put_wq;
|
|
struct workqueue_struct *cifsoplockd_wq;
|
|
struct workqueue_struct *deferredclose_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;
|
|
struct timespec64 ts;
|
|
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 |= SB_POSIXACL;
|
|
|
|
if (tcon->snapshot_time)
|
|
sb->s_flags |= SB_RDONLY;
|
|
|
|
if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
else
|
|
sb->s_maxbytes = MAX_NON_LFS;
|
|
|
|
/*
|
|
* Some very old servers like DOS and OS/2 used 2 second granularity
|
|
* (while all current servers use 100ns granularity - see MS-DTYP)
|
|
* but 1 second is the maximum allowed granularity for the VFS
|
|
* so for old servers set time granularity to 1 second while for
|
|
* everything else (current servers) set it to 100ns.
|
|
*/
|
|
if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) &&
|
|
((tcon->ses->capabilities &
|
|
tcon->ses->server->vals->cap_nt_find) == 0) &&
|
|
!tcon->unix_ext) {
|
|
sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */
|
|
ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0);
|
|
sb->s_time_min = ts.tv_sec;
|
|
ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX),
|
|
cpu_to_le16(SMB_TIME_MAX), 0);
|
|
sb->s_time_max = ts.tv_sec;
|
|
} else {
|
|
/*
|
|
* Almost every server, including all SMB2+, uses DCE TIME
|
|
* ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC
|
|
*/
|
|
sb->s_time_gran = 100;
|
|
ts = cifs_NTtimeToUnix(0);
|
|
sb->s_time_min = ts.tv_sec;
|
|
ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX));
|
|
sb->s_time_max = ts.tv_sec;
|
|
}
|
|
|
|
sb->s_magic = CIFS_SUPER_MAGIC;
|
|
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 if readahead size not set on mount */
|
|
if (cifs_sb->ctx->rsize == 0)
|
|
cifs_sb->ctx->rsize =
|
|
tcon->ses->server->ops->negotiate_rsize(tcon, cifs_sb->ctx);
|
|
if (cifs_sb->ctx->rasize)
|
|
sb->s_bdi->ra_pages = cifs_sb->ctx->rasize / PAGE_SIZE;
|
|
else
|
|
sb->s_bdi->ra_pages = cifs_sb->ctx->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);
|
|
|
|
/*
|
|
* We ned to release all dentries for the cached directories
|
|
* before we kill the sb.
|
|
*/
|
|
if (cifs_sb->root) {
|
|
close_all_cached_dirs(cifs_sb);
|
|
|
|
/* finally release root dentry */
|
|
dput(cifs_sb->root);
|
|
cifs_sb->root = NULL;
|
|
}
|
|
|
|
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, cifs_sb, buf);
|
|
|
|
free_xid(xid);
|
|
return rc;
|
|
}
|
|
|
|
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 user_namespace *mnt_userns,
|
|
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(&init_user_ns, 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 = alloc_inode_sb(sb, 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->netfs.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;
|
|
spin_lock_init(&cifs_inode->open_file_lock);
|
|
generate_random_uuid(cifs_inode->lease_key);
|
|
cifs_inode->symlink_target = NULL;
|
|
|
|
/*
|
|
* Can not set i_flags here - they get immediately overwritten to zero
|
|
* by the VFS.
|
|
*/
|
|
/* cifs_inode->netfs.inode.i_flags = S_NOATIME | S_NOCMTIME; */
|
|
INIT_LIST_HEAD(&cifs_inode->openFileList);
|
|
INIT_LIST_HEAD(&cifs_inode->llist);
|
|
INIT_LIST_HEAD(&cifs_inode->deferred_closes);
|
|
spin_lock_init(&cifs_inode->deferred_lock);
|
|
return &cifs_inode->netfs.inode;
|
|
}
|
|
|
|
static void
|
|
cifs_free_inode(struct inode *inode)
|
|
{
|
|
struct cifsInodeInfo *cinode = CIFS_I(inode);
|
|
|
|
if (S_ISLNK(inode->i_mode))
|
|
kfree(cinode->symlink_target);
|
|
kmem_cache_free(cifs_inode_cachep, cinode);
|
|
}
|
|
|
|
static void
|
|
cifs_evict_inode(struct inode *inode)
|
|
{
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
if (inode->i_state & I_PINNING_FSCACHE_WB)
|
|
cifs_fscache_unuse_inode_cookie(inode, true);
|
|
cifs_fscache_release_inode_cookie(inode);
|
|
clear_inode(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)");
|
|
}
|
|
if (server->rdma)
|
|
seq_puts(s, ",rdma");
|
|
}
|
|
|
|
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 NTLMv2:
|
|
seq_puts(s, "ntlmv2");
|
|
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");
|
|
|
|
if (ses->sectype == Kerberos)
|
|
seq_printf(s, ",cruid=%u",
|
|
from_kuid_munged(&init_user_ns, ses->cred_uid));
|
|
}
|
|
|
|
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 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE)
|
|
seq_puts(s, "singleclient"); /* assume only one client access */
|
|
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE)
|
|
seq_puts(s, "ro"); /* read only caching assumed */
|
|
else
|
|
seq_puts(s, "loose");
|
|
}
|
|
|
|
/*
|
|
* cifs_show_devname() is used so we show the mount device name with correct
|
|
* format (e.g. forward slashes vs. back slashes) in /proc/mounts
|
|
*/
|
|
static int cifs_show_devname(struct seq_file *m, struct dentry *root)
|
|
{
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
|
|
char *devname = kstrdup(cifs_sb->ctx->source, GFP_KERNEL);
|
|
|
|
if (devname == NULL)
|
|
seq_puts(m, "none");
|
|
else {
|
|
convert_delimiter(devname, '/');
|
|
/* escape all spaces in share names */
|
|
seq_escape(m, devname, " \t");
|
|
kfree(devname);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 (tcon->no_lease)
|
|
seq_puts(s, ",nolease");
|
|
if (cifs_sb->ctx->multiuser)
|
|
seq_puts(s, ",multiuser");
|
|
else if (tcon->ses->user_name)
|
|
seq_show_option(s, "username", tcon->ses->user_name);
|
|
|
|
if (tcon->ses->domainName && tcon->ses->domainName[0] != 0)
|
|
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->ctx->linux_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->ctx->linux_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->ctx->file_mode,
|
|
cifs_sb->ctx->dir_mode);
|
|
if (cifs_sb->ctx->iocharset)
|
|
seq_printf(s, ",iocharset=%s", cifs_sb->ctx->iocharset);
|
|
if (tcon->seal)
|
|
seq_puts(s, ",seal");
|
|
else if (tcon->ses->server->ignore_signature)
|
|
seq_puts(s, ",signloosely");
|
|
if (tcon->nocase)
|
|
seq_puts(s, ",nocase");
|
|
if (tcon->nodelete)
|
|
seq_puts(s, ",nodelete");
|
|
if (cifs_sb->ctx->no_sparse)
|
|
seq_puts(s, ",nosparse");
|
|
if (tcon->local_lease)
|
|
seq_puts(s, ",locallease");
|
|
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->posix_extensions)
|
|
seq_puts(s, ",posix");
|
|
else if (tcon->unix_ext)
|
|
seq_puts(s, ",unix");
|
|
else
|
|
seq_puts(s, ",nounix");
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
|
|
seq_puts(s, ",nodfs");
|
|
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_NO_HANDLE_CACHE)
|
|
seq_puts(s, ",nohandlecache");
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)
|
|
seq_puts(s, ",modefromsid");
|
|
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 & SB_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->ctx->backupuid));
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
|
|
seq_printf(s, ",backupgid=%u",
|
|
from_kgid_munged(&init_user_ns,
|
|
cifs_sb->ctx->backupgid));
|
|
|
|
seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize);
|
|
seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize);
|
|
seq_printf(s, ",bsize=%u", cifs_sb->ctx->bsize);
|
|
if (cifs_sb->ctx->rasize)
|
|
seq_printf(s, ",rasize=%u", cifs_sb->ctx->rasize);
|
|
if (tcon->ses->server->min_offload)
|
|
seq_printf(s, ",esize=%u", tcon->ses->server->min_offload);
|
|
seq_printf(s, ",echo_interval=%lu",
|
|
tcon->ses->server->echo_interval / HZ);
|
|
|
|
/* Only display the following if overridden on mount */
|
|
if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE)
|
|
seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits);
|
|
if (tcon->ses->server->tcp_nodelay)
|
|
seq_puts(s, ",tcpnodelay");
|
|
if (tcon->ses->server->noautotune)
|
|
seq_puts(s, ",noautotune");
|
|
if (tcon->ses->server->noblocksnd)
|
|
seq_puts(s, ",noblocksend");
|
|
|
|
if (tcon->snapshot_time)
|
|
seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
|
|
if (tcon->handle_timeout)
|
|
seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
|
|
|
|
/*
|
|
* Display file and directory attribute timeout in seconds.
|
|
* If file and directory attribute timeout the same then actimeo
|
|
* was likely specified on mount
|
|
*/
|
|
if (cifs_sb->ctx->acdirmax == cifs_sb->ctx->acregmax)
|
|
seq_printf(s, ",actimeo=%lu", cifs_sb->ctx->acregmax / HZ);
|
|
else {
|
|
seq_printf(s, ",acdirmax=%lu", cifs_sb->ctx->acdirmax / HZ);
|
|
seq_printf(s, ",acregmax=%lu", cifs_sb->ctx->acregmax / HZ);
|
|
}
|
|
seq_printf(s, ",closetimeo=%lu", cifs_sb->ctx->closetimeo / HZ);
|
|
|
|
if (tcon->ses->chan_max > 1)
|
|
seq_printf(s, ",multichannel,max_channels=%zu",
|
|
tcon->ses->chan_max);
|
|
|
|
if (tcon->use_witness)
|
|
seq_puts(s, ",witness");
|
|
|
|
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);
|
|
spin_lock(&tcon->tc_lock);
|
|
if ((tcon->tc_count > 1) || (tcon->status == TID_EXITING)) {
|
|
/* 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(&tcon->tc_lock);
|
|
spin_unlock(&cifs_tcp_ses_lock);
|
|
return;
|
|
} else if (tcon->tc_count == 1)
|
|
tcon->status = TID_EXITING;
|
|
spin_unlock(&tcon->tc_lock);
|
|
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_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
fscache_unpin_writeback(wbc, cifs_inode_cookie(inode));
|
|
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,
|
|
.write_inode = cifs_write_inode,
|
|
.free_inode = cifs_free_inode,
|
|
.drop_inode = cifs_drop_inode,
|
|
.evict_inode = cifs_evict_inode,
|
|
/* .show_path = cifs_show_path, */ /* Would we ever need show path? */
|
|
.show_devname = cifs_show_devname,
|
|
/* .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,
|
|
#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 smb3_fs_context *ctx, 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(ctx, 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);
|
|
s = full_path;
|
|
|
|
do {
|
|
struct inode *dir = d_inode(dentry);
|
|
struct dentry *child;
|
|
|
|
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_positive_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);
|
|
}
|
|
|
|
struct dentry *
|
|
cifs_smb3_do_mount(struct file_system_type *fs_type,
|
|
int flags, struct smb3_fs_context *old_ctx)
|
|
{
|
|
int rc;
|
|
struct super_block *sb = NULL;
|
|
struct cifs_sb_info *cifs_sb = NULL;
|
|
struct cifs_mnt_data mnt_data;
|
|
struct dentry *root;
|
|
|
|
/*
|
|
* Prints in Kernel / CIFS log the attempted mount operation
|
|
* If CIFS_DEBUG && cifs_FYI
|
|
*/
|
|
if (cifsFYI)
|
|
cifs_dbg(FYI, "Devname: %s flags: %d\n", old_ctx->UNC, flags);
|
|
else
|
|
cifs_info("Attempting to mount %s\n", old_ctx->UNC);
|
|
|
|
cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
|
|
if (cifs_sb == NULL) {
|
|
root = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
cifs_sb->ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL);
|
|
if (!cifs_sb->ctx) {
|
|
root = ERR_PTR(-ENOMEM);
|
|
goto out;
|
|
}
|
|
rc = smb3_fs_context_dup(cifs_sb->ctx, old_ctx);
|
|
if (rc) {
|
|
root = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = cifs_setup_cifs_sb(cifs_sb);
|
|
if (rc) {
|
|
root = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = cifs_mount(cifs_sb, cifs_sb->ctx);
|
|
if (rc) {
|
|
if (!(flags & SB_SILENT))
|
|
cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
|
|
rc);
|
|
root = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
mnt_data.ctx = cifs_sb->ctx;
|
|
mnt_data.cifs_sb = cifs_sb;
|
|
mnt_data.flags = flags;
|
|
|
|
/* BB should we make this contingent on mount parm? */
|
|
flags |= SB_NODIRATIME | SB_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);
|
|
cifs_sb = NULL;
|
|
goto out;
|
|
}
|
|
|
|
if (sb->s_root) {
|
|
cifs_dbg(FYI, "Use existing superblock\n");
|
|
cifs_umount(cifs_sb);
|
|
cifs_sb = NULL;
|
|
} else {
|
|
rc = cifs_read_super(sb);
|
|
if (rc) {
|
|
root = ERR_PTR(rc);
|
|
goto out_super;
|
|
}
|
|
|
|
sb->s_flags |= SB_ACTIVE;
|
|
}
|
|
|
|
root = cifs_get_root(cifs_sb ? cifs_sb->ctx : old_ctx, sb);
|
|
if (IS_ERR(root))
|
|
goto out_super;
|
|
|
|
if (cifs_sb)
|
|
cifs_sb->root = dget(root);
|
|
|
|
cifs_dbg(FYI, "dentry root is: %p\n", root);
|
|
return root;
|
|
|
|
out_super:
|
|
deactivate_locked_super(sb);
|
|
return root;
|
|
out:
|
|
if (cifs_sb) {
|
|
if (!sb || IS_ERR(sb)) { /* otherwise kill_sb will handle */
|
|
kfree(cifs_sb->prepath);
|
|
smb3_cleanup_fs_context(cifs_sb->ctx);
|
|
kfree(cifs_sb);
|
|
}
|
|
}
|
|
return root;
|
|
}
|
|
|
|
|
|
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_flags & IOCB_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)
|
|
{
|
|
struct cifsFileInfo *cfile = file->private_data;
|
|
struct cifs_tcon *tcon;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
if (cfile && cfile->tlink) {
|
|
tcon = tlink_tcon(cfile->tlink);
|
|
if (tcon->ses->server->ops->llseek)
|
|
return tcon->ses->server->ops->llseek(file, tcon,
|
|
offset, whence);
|
|
}
|
|
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",
|
|
.init_fs_context = smb3_init_fs_context,
|
|
.parameters = smb3_fs_parameters,
|
|
.kill_sb = cifs_kill_sb,
|
|
.fs_flags = FS_RENAME_DOES_D_MOVE,
|
|
};
|
|
MODULE_ALIAS_FS("cifs");
|
|
|
|
struct file_system_type smb3_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "smb3",
|
|
.init_fs_context = smb3_init_fs_context,
|
|
.parameters = smb3_fs_parameters,
|
|
.kill_sb = cifs_kill_sb,
|
|
.fs_flags = FS_RENAME_DOES_D_MOVE,
|
|
};
|
|
MODULE_ALIAS_FS("smb3");
|
|
MODULE_ALIAS("smb3");
|
|
|
|
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,
|
|
.get_acl = cifs_get_acl,
|
|
.set_acl = cifs_set_acl,
|
|
};
|
|
|
|
const struct inode_operations cifs_file_inode_ops = {
|
|
.setattr = cifs_setattr,
|
|
.getattr = cifs_getattr,
|
|
.permission = cifs_permission,
|
|
.listxattr = cifs_listxattr,
|
|
.fiemap = cifs_fiemap,
|
|
.get_acl = cifs_get_acl,
|
|
.set_acl = cifs_set_acl,
|
|
};
|
|
|
|
const char *cifs_get_link(struct dentry *dentry, struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
char *target_path;
|
|
|
|
target_path = kmalloc(PATH_MAX, GFP_KERNEL);
|
|
if (!target_path)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (likely(CIFS_I(inode)->symlink_target)) {
|
|
strscpy(target_path, CIFS_I(inode)->symlink_target, PATH_MAX);
|
|
} else {
|
|
kfree(target_path);
|
|
target_path = ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (!IS_ERR(target_path))
|
|
set_delayed_call(done, kfree_link, target_path);
|
|
|
|
return target_path;
|
|
}
|
|
|
|
const struct inode_operations cifs_symlink_inode_ops = {
|
|
.get_link = cifs_get_link,
|
|
.permission = cifs_permission,
|
|
.listxattr = cifs_listxattr,
|
|
};
|
|
|
|
static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
|
|
struct file *dst_file, loff_t destoff, loff_t len,
|
|
unsigned int remap_flags)
|
|
{
|
|
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;
|
|
|
|
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
|
|
return -EINVAL;
|
|
|
|
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 < 0 ? rc : len;
|
|
}
|
|
|
|
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_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;
|
|
}
|
|
|
|
rc = -EOPNOTSUPP;
|
|
if (!target_tcon->ses->server->ops->copychunk_range)
|
|
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");
|
|
|
|
rc = filemap_write_and_wait_range(src_inode->i_mapping, off,
|
|
off + len - 1);
|
|
if (rc)
|
|
goto unlock;
|
|
|
|
/* should we flush first and last page first */
|
|
truncate_inode_pages(&target_inode->i_data, 0);
|
|
|
|
rc = file_modified(dst_file);
|
|
if (!rc)
|
|
rc = target_tcon->ses->server->ops->copychunk_range(xid,
|
|
smb_file_src, smb_file_target, off, len, destoff);
|
|
|
|
file_accessed(src_file);
|
|
|
|
/* force revalidate of size and timestamps of target file now
|
|
* that target is updated on the server
|
|
*/
|
|
CIFS_I(target_inode)->time = 0;
|
|
|
|
unlock:
|
|
/* 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;
|
|
struct cifsFileInfo *cfile = dst_file->private_data;
|
|
|
|
if (cfile->swapfile) {
|
|
rc = -EOPNOTSUPP;
|
|
free_xid(xid);
|
|
return rc;
|
|
}
|
|
|
|
rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
|
|
len, flags);
|
|
free_xid(xid);
|
|
|
|
if (rc == -EOPNOTSUPP || rc == -EXDEV)
|
|
rc = generic_copy_file_range(src_file, off, dst_file,
|
|
destoff, len, flags);
|
|
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,
|
|
.flock = cifs_flock,
|
|
.fsync = cifs_fsync,
|
|
.flush = cifs_flush,
|
|
.mmap = cifs_file_mmap,
|
|
.splice_read = generic_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.llseek = cifs_llseek,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_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,
|
|
.flock = cifs_flock,
|
|
.fsync = cifs_strict_fsync,
|
|
.flush = cifs_flush,
|
|
.mmap = cifs_file_strict_mmap,
|
|
.splice_read = generic_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.llseek = cifs_llseek,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_file_range,
|
|
.setlease = cifs_setlease,
|
|
.fallocate = cifs_fallocate,
|
|
};
|
|
|
|
const struct file_operations cifs_file_direct_ops = {
|
|
.read_iter = cifs_direct_readv,
|
|
.write_iter = cifs_direct_writev,
|
|
.open = cifs_open,
|
|
.release = cifs_close,
|
|
.lock = cifs_lock,
|
|
.flock = cifs_flock,
|
|
.fsync = cifs_fsync,
|
|
.flush = cifs_flush,
|
|
.mmap = cifs_file_mmap,
|
|
.splice_read = generic_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_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,
|
|
.splice_write = iter_file_splice_write,
|
|
.llseek = cifs_llseek,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_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,
|
|
.splice_write = iter_file_splice_write,
|
|
.llseek = cifs_llseek,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_file_range,
|
|
.setlease = cifs_setlease,
|
|
.fallocate = cifs_fallocate,
|
|
};
|
|
|
|
const struct file_operations cifs_file_direct_nobrl_ops = {
|
|
.read_iter = cifs_direct_readv,
|
|
.write_iter = cifs_direct_writev,
|
|
.open = cifs_open,
|
|
.release = cifs_close,
|
|
.fsync = cifs_fsync,
|
|
.flush = cifs_flush,
|
|
.mmap = cifs_file_mmap,
|
|
.splice_read = generic_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
.unlocked_ioctl = cifs_ioctl,
|
|
.copy_file_range = cifs_copy_file_range,
|
|
.remap_file_range = cifs_remap_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,
|
|
.remap_file_range = cifs_remap_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->netfs.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_usercopy("cifs_request",
|
|
CIFSMaxBufSize + max_hdr_size, 0,
|
|
SLAB_HWCACHE_ALIGN, 0,
|
|
CIFSMaxBufSize + max_hdr_size,
|
|
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_usercopy("cifs_small_rq",
|
|
MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
|
|
0, MAX_CIFS_SMALL_BUFFER_SIZE, 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 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 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);
|
|
/*
|
|
* Initialize Global counters
|
|
*/
|
|
atomic_set(&sesInfoAllocCount, 0);
|
|
atomic_set(&tconInfoAllocCount, 0);
|
|
atomic_set(&tcpSesNextId, 0);
|
|
atomic_set(&tcpSesAllocCount, 0);
|
|
atomic_set(&tcpSesReconnectCount, 0);
|
|
atomic_set(&tconInfoReconnectCount, 0);
|
|
|
|
atomic_set(&buf_alloc_count, 0);
|
|
atomic_set(&small_buf_alloc_count, 0);
|
|
#ifdef CONFIG_CIFS_STATS2
|
|
atomic_set(&total_buf_alloc_count, 0);
|
|
atomic_set(&total_small_buf_alloc_count, 0);
|
|
if (slow_rsp_threshold < 1)
|
|
cifs_dbg(FYI, "slow_response_threshold msgs disabled\n");
|
|
else if (slow_rsp_threshold > 32767)
|
|
cifs_dbg(VFS,
|
|
"slow response threshold set higher than recommended (0 to 32767)\n");
|
|
#endif /* CONFIG_CIFS_STATS2 */
|
|
|
|
atomic_set(&mid_count, 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;
|
|
}
|
|
|
|
/*
|
|
* Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
|
|
* so that we don't launch too many worker threads but
|
|
* Documentation/core-api/workqueue.rst recommends setting it to 0
|
|
*/
|
|
|
|
/* WQ_UNBOUND allows decrypt tasks to run on any CPU */
|
|
decrypt_wq = alloc_workqueue("smb3decryptd",
|
|
WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
|
|
if (!decrypt_wq) {
|
|
rc = -ENOMEM;
|
|
goto out_destroy_cifsiod_wq;
|
|
}
|
|
|
|
fileinfo_put_wq = alloc_workqueue("cifsfileinfoput",
|
|
WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
|
|
if (!fileinfo_put_wq) {
|
|
rc = -ENOMEM;
|
|
goto out_destroy_decrypt_wq;
|
|
}
|
|
|
|
cifsoplockd_wq = alloc_workqueue("cifsoplockd",
|
|
WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
|
|
if (!cifsoplockd_wq) {
|
|
rc = -ENOMEM;
|
|
goto out_destroy_fileinfo_put_wq;
|
|
}
|
|
|
|
deferredclose_wq = alloc_workqueue("deferredclose",
|
|
WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
|
|
if (!deferredclose_wq) {
|
|
rc = -ENOMEM;
|
|
goto out_destroy_cifsoplockd_wq;
|
|
}
|
|
|
|
rc = cifs_init_inodecache();
|
|
if (rc)
|
|
goto out_destroy_deferredclose_wq;
|
|
|
|
rc = init_mids();
|
|
if (rc)
|
|
goto out_destroy_inodecache;
|
|
|
|
rc = cifs_init_request_bufs();
|
|
if (rc)
|
|
goto out_destroy_mids;
|
|
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
rc = dfs_cache_init();
|
|
if (rc)
|
|
goto out_destroy_request_bufs;
|
|
#endif /* CONFIG_CIFS_DFS_UPCALL */
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
rc = init_cifs_spnego();
|
|
if (rc)
|
|
goto out_destroy_dfs_cache;
|
|
#endif /* CONFIG_CIFS_UPCALL */
|
|
#ifdef CONFIG_CIFS_SWN_UPCALL
|
|
rc = cifs_genl_init();
|
|
if (rc)
|
|
goto out_register_key_type;
|
|
#endif /* CONFIG_CIFS_SWN_UPCALL */
|
|
|
|
rc = init_cifs_idmap();
|
|
if (rc)
|
|
goto out_cifs_swn_init;
|
|
|
|
rc = register_filesystem(&cifs_fs_type);
|
|
if (rc)
|
|
goto out_init_cifs_idmap;
|
|
|
|
rc = register_filesystem(&smb3_fs_type);
|
|
if (rc) {
|
|
unregister_filesystem(&cifs_fs_type);
|
|
goto out_init_cifs_idmap;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_init_cifs_idmap:
|
|
exit_cifs_idmap();
|
|
out_cifs_swn_init:
|
|
#ifdef CONFIG_CIFS_SWN_UPCALL
|
|
cifs_genl_exit();
|
|
out_register_key_type:
|
|
#endif
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
exit_cifs_spnego();
|
|
out_destroy_dfs_cache:
|
|
#endif
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
dfs_cache_destroy();
|
|
out_destroy_request_bufs:
|
|
#endif
|
|
cifs_destroy_request_bufs();
|
|
out_destroy_mids:
|
|
destroy_mids();
|
|
out_destroy_inodecache:
|
|
cifs_destroy_inodecache();
|
|
out_destroy_deferredclose_wq:
|
|
destroy_workqueue(deferredclose_wq);
|
|
out_destroy_cifsoplockd_wq:
|
|
destroy_workqueue(cifsoplockd_wq);
|
|
out_destroy_fileinfo_put_wq:
|
|
destroy_workqueue(fileinfo_put_wq);
|
|
out_destroy_decrypt_wq:
|
|
destroy_workqueue(decrypt_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_smb3\n");
|
|
unregister_filesystem(&cifs_fs_type);
|
|
unregister_filesystem(&smb3_fs_type);
|
|
cifs_dfs_release_automount_timer();
|
|
exit_cifs_idmap();
|
|
#ifdef CONFIG_CIFS_SWN_UPCALL
|
|
cifs_genl_exit();
|
|
#endif
|
|
#ifdef CONFIG_CIFS_UPCALL
|
|
exit_cifs_spnego();
|
|
#endif
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL
|
|
dfs_cache_destroy();
|
|
#endif
|
|
cifs_destroy_request_bufs();
|
|
destroy_mids();
|
|
cifs_destroy_inodecache();
|
|
destroy_workqueue(deferredclose_wq);
|
|
destroy_workqueue(cifsoplockd_wq);
|
|
destroy_workqueue(decrypt_wq);
|
|
destroy_workqueue(fileinfo_put_wq);
|
|
destroy_workqueue(cifsiod_wq);
|
|
cifs_proc_clean();
|
|
}
|
|
|
|
MODULE_AUTHOR("Steve French");
|
|
MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
|
|
MODULE_DESCRIPTION
|
|
("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
|
|
"also older servers complying with the SNIA CIFS Specification)");
|
|
MODULE_VERSION(CIFS_VERSION);
|
|
MODULE_SOFTDEP("ecb");
|
|
MODULE_SOFTDEP("hmac");
|
|
MODULE_SOFTDEP("md5");
|
|
MODULE_SOFTDEP("nls");
|
|
MODULE_SOFTDEP("aes");
|
|
MODULE_SOFTDEP("cmac");
|
|
MODULE_SOFTDEP("sha256");
|
|
MODULE_SOFTDEP("sha512");
|
|
MODULE_SOFTDEP("aead2");
|
|
MODULE_SOFTDEP("ccm");
|
|
MODULE_SOFTDEP("gcm");
|
|
module_init(init_cifs)
|
|
module_exit(exit_cifs)
|