Merge branch 'akpm' (Andrew's patch-bomb)
Merge patches through Andrew Morton:
"180 patches - err 181 - listed below:
- most of MM. I held back the (large) "memcg: add hugetlb extension"
series because a bunfight has recently broken out.
- leds. After this, Bryan Wu will be handling drivers/leds/
- backlight
- lib/
- rtc"
* emailed from Andrew Morton <akpm@linux-foundation.org>: (181 patches)
drivers/rtc/rtc-s3c.c: fix compiler warning
drivers/rtc/rtc-tegra.c: clean up probe/remove routines
drivers/rtc/rtc-pl031.c: remove RTC timer interrupt handling
drivers/rtc/rtc-lpc32xx.c: add device tree support
drivers/rtc/rtc-m41t93.c: don't let get_time() reset M41T93_FLAG_OF
rtc: ds1307: add trickle charger support
rtc: ds1307: remove superfluous initialization
rtc: rename CONFIG_RTC_MXC to CONFIG_RTC_DRV_MXC
drivers/rtc/Kconfig: place RTC_DRV_IMXDI and RTC_MXC under "on-CPU RTC drivers"
drivers/rtc/rtc-pcf8563.c: add RTC_VL_READ/RTC_VL_CLR ioctl feature
rtc: add ioctl to get/clear battery low voltage status
drivers/rtc/rtc-ep93xx.c: convert to use module_platform_driver()
rtc/spear: add Device Tree probing capability
lib/vsprintf.c: "%#o",0 becomes '0' instead of '00'
radix-tree: fix preload vector size
spinlock_debug: print kallsyms name for lock
vsprintf: fix %ps on non symbols when using kallsyms
lib/bitmap.c: fix documentation for scnprintf() functions
lib/string_helpers.c: make arrays static
lib/test-kstrtox.c: mark const init data with __initconst instead of __initdata
...
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 2b243af..a08306a 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -158,3 +158,23 @@
depends on CIFS && EXPERIMENTAL && BROKEN
help
Allows NFS server to export a CIFS mounted share (nfsd over cifs)
+
+config CIFS_SMB2
+ bool "SMB2 network file system support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL && INET && BROKEN
+ select NLS
+ select KEYS
+ select FSCACHE
+ select DNS_RESOLVER
+
+ help
+ This enables experimental support for the SMB2 (Server Message Block
+ version 2) protocol. The SMB2 protocol is the successor to the
+ popular CIFS and SMB network file sharing protocols. SMB2 is the
+ native file sharing mechanism for recent versions of Windows
+ operating systems (since Vista). SMB2 enablement will eventually
+ allow users better performance, security and features, than would be
+ possible with cifs. Note that smb2 mount options also are simpler
+ (compared to cifs) due to protocol improvements.
+
+ Unless you are a developer or tester, say N.
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 005d524..4b41275 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -6,7 +6,7 @@
cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
link.o misc.o netmisc.o smbencrypt.o transport.o asn1.o \
cifs_unicode.o nterr.o xattr.o cifsencrypt.o \
- readdir.o ioctl.o sess.o export.o
+ readdir.o ioctl.o sess.o export.o smb1ops.o
cifs-$(CONFIG_CIFS_ACL) += cifsacl.o
@@ -15,3 +15,5 @@
cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
+
+cifs-$(CONFIG_CIFS_SMB2) += smb2ops.o
diff --git a/fs/cifs/README b/fs/cifs/README
index b7d782b..22ab7b5 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -608,11 +608,6 @@
in the kernel configuration.
Configuration pseudo-files:
-MultiuserMount If set to one, more than one CIFS session to
- the same server ip address can be established
- if more than one uid accesses the same mount
- point and if the uids user/password mapping
- information is available. (default is 0)
PacketSigningEnabled If set to one, cifs packet signing is enabled
and will be used if the server requires
it. If set to two, cifs packet signing is
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 2704646..e814052 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -57,19 +57,21 @@
}
}
-#ifdef CONFIG_CIFS_DEBUG2
void cifs_dump_detail(void *buf)
{
+#ifdef CONFIG_CIFS_DEBUG2
struct smb_hdr *smb = (struct smb_hdr *)buf;
cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
smb->Command, smb->Status.CifsError,
smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));
+#endif /* CONFIG_CIFS_DEBUG2 */
}
void cifs_dump_mids(struct TCP_Server_Info *server)
{
+#ifdef CONFIG_CIFS_DEBUG2
struct list_head *tmp;
struct mid_q_entry *mid_entry;
@@ -102,8 +104,8 @@
}
}
spin_unlock(&GlobalMid_Lock);
-}
#endif /* CONFIG_CIFS_DEBUG2 */
+}
#ifdef CONFIG_PROC_FS
static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
@@ -420,7 +422,6 @@
static const struct file_operations cifsFYI_proc_fops;
static const struct file_operations cifs_lookup_cache_proc_fops;
static const struct file_operations traceSMB_proc_fops;
-static const struct file_operations cifs_multiuser_mount_proc_fops;
static const struct file_operations cifs_security_flags_proc_fops;
static const struct file_operations cifs_linux_ext_proc_fops;
@@ -440,8 +441,6 @@
proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
&cifs_linux_ext_proc_fops);
- proc_create("MultiuserMount", 0, proc_fs_cifs,
- &cifs_multiuser_mount_proc_fops);
proc_create("SecurityFlags", 0, proc_fs_cifs,
&cifs_security_flags_proc_fops);
proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
@@ -460,7 +459,6 @@
#ifdef CONFIG_CIFS_STATS
remove_proc_entry("Stats", proc_fs_cifs);
#endif
- remove_proc_entry("MultiuserMount", proc_fs_cifs);
remove_proc_entry("SecurityFlags", proc_fs_cifs);
remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
@@ -617,52 +615,6 @@
.write = traceSMB_proc_write,
};
-static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
-{
- seq_printf(m, "%d\n", multiuser_mount);
- return 0;
-}
-
-static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
-{
- return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
-}
-
-static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
- const char __user *buffer, size_t count, loff_t *ppos)
-{
- char c;
- int rc;
- static bool warned;
-
- rc = get_user(c, buffer);
- if (rc)
- return rc;
- if (c == '0' || c == 'n' || c == 'N')
- multiuser_mount = 0;
- else if (c == '1' || c == 'y' || c == 'Y') {
- multiuser_mount = 1;
- if (!warned) {
- warned = true;
- printk(KERN_WARNING "CIFS VFS: The legacy multiuser "
- "mount code is scheduled to be deprecated in "
- "3.5. Please switch to using the multiuser "
- "mount option.");
- }
- }
-
- return count;
-}
-
-static const struct file_operations cifs_multiuser_mount_proc_fops = {
- .owner = THIS_MODULE,
- .open = cifs_multiuser_mount_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = cifs_multiuser_mount_proc_write,
-};
-
static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "0x%x\n", global_secflags);
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index 566e0ae..c0c68bb 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -24,10 +24,10 @@
#define _H_CIFS_DEBUG
void cifs_dump_mem(char *label, void *data, int length);
-#ifdef CONFIG_CIFS_DEBUG2
-#define DBG2 2
void cifs_dump_detail(void *);
void cifs_dump_mids(struct TCP_Server_Info *);
+#ifdef CONFIG_CIFS_DEBUG2
+#define DBG2 2
#else
#define DBG2 0
#endif
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 0a0fa02..8b6e344 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -56,7 +56,6 @@
bool enable_oplocks = true;
unsigned int linuxExtEnabled = 1;
unsigned int lookupCacheEnabled = 1;
-unsigned int multiuser_mount = 0;
unsigned int global_secflags = CIFSSEC_DEF;
/* unsigned int ntlmv2_support = 0; */
unsigned int sign_CIFS_PDUs = 1;
@@ -125,7 +124,7 @@
goto out_no_root;
}
- /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
+ /* do that *after* d_make_root() - we want NULL ->d_op for root here */
if (cifs_sb_master_tcon(cifs_sb)->nocase)
sb->s_d_op = &cifs_ci_dentry_ops;
else
@@ -329,6 +328,19 @@
seq_printf(s, "i");
}
+static void
+cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
+{
+ seq_printf(s, ",cache=");
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
+ seq_printf(s, "strict");
+ else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
+ seq_printf(s, "none");
+ else
+ seq_printf(s, "loose");
+}
+
/*
* cifs_show_options() is for displaying mount options in /proc/mounts.
* Not all settable options are displayed but most of the important
@@ -342,7 +354,9 @@
struct sockaddr *srcaddr;
srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
+ seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
cifs_show_security(s, tcon->ses->server);
+ cifs_show_cache_flavor(s, cifs_sb);
seq_printf(s, ",unc=%s", tcon->treeName);
@@ -408,8 +422,6 @@
seq_printf(s, ",rwpidforward");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
seq_printf(s, ",forcemand");
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
- seq_printf(s, ",directio");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
seq_printf(s, ",nouser_xattr");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
@@ -432,8 +444,6 @@
seq_printf(s, ",nostrictsync");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
seq_printf(s, ",noperm");
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
- seq_printf(s, ",strictcache");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
@@ -945,7 +955,6 @@
struct cifsInodeInfo *cifsi = inode;
inode_init_once(&cifsi->vfs_inode);
- INIT_LIST_HEAD(&cifsi->llist);
mutex_init(&cifsi->lock_mutex);
}
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4ff6313..20350a9 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -43,6 +43,7 @@
#define CIFS_MIN_RCV_POOL 4
+#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
/*
* default attribute cache timeout (jiffies)
*/
@@ -150,6 +151,57 @@
*****************************************************************
*/
+enum smb_version {
+ Smb_1 = 1,
+ Smb_21,
+};
+
+struct mid_q_entry;
+struct TCP_Server_Info;
+struct cifsFileInfo;
+struct cifs_ses;
+
+struct smb_version_operations {
+ int (*send_cancel)(struct TCP_Server_Info *, void *,
+ struct mid_q_entry *);
+ bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
+ /* setup request: allocate mid, sign message */
+ int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
+ struct mid_q_entry **);
+ /* check response: verify signature, map error */
+ int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
+ bool);
+ void (*add_credits)(struct TCP_Server_Info *, const unsigned int);
+ void (*set_credits)(struct TCP_Server_Info *, const int);
+ int * (*get_credits_field)(struct TCP_Server_Info *);
+ /* data offset from read response message */
+ unsigned int (*read_data_offset)(char *);
+ /* data length from read response message */
+ unsigned int (*read_data_length)(char *);
+ /* map smb to linux error */
+ int (*map_error)(char *, bool);
+ /* find mid corresponding to the response message */
+ struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
+ void (*dump_detail)(void *);
+ /* verify the message */
+ int (*check_message)(char *, unsigned int);
+ bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
+};
+
+struct smb_version_values {
+ char *version_string;
+ __u32 large_lock_type;
+ __u32 exclusive_lock_type;
+ __u32 shared_lock_type;
+ __u32 unlock_lock_type;
+ size_t header_size;
+ size_t max_header_size;
+ size_t read_rsp_size;
+};
+
+#define HEADER_SIZE(server) (server->vals->header_size)
+#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
+
struct smb_vol {
char *username;
char *password;
@@ -205,6 +257,8 @@
bool sockopt_tcp_nodelay:1;
unsigned short int port;
unsigned long actimeo; /* attribute cache timeout (jiffies) */
+ struct smb_version_operations *ops;
+ struct smb_version_values *vals;
char *prepath;
struct sockaddr_storage srcaddr; /* allow binding to a local IP */
struct nls_table *local_nls;
@@ -242,6 +296,8 @@
int srv_count; /* reference counter */
/* 15 character server name + 0x20 16th byte indicating type = srv */
char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
+ struct smb_version_operations *ops;
+ struct smb_version_values *vals;
enum statusEnum tcpStatus; /* what we think the status is */
char *hostname; /* hostname portion of UNC string */
struct socket *ssocket;
@@ -321,16 +377,6 @@
return num;
}
-static inline int*
-get_credits_field(struct TCP_Server_Info *server)
-{
- /*
- * This will change to switch statement when we reserve slots for echos
- * and oplock breaks.
- */
- return &server->credits;
-}
-
static inline bool
has_credits(struct TCP_Server_Info *server, int *credits)
{
@@ -341,16 +387,16 @@
return num > 0;
}
-static inline size_t
-header_size(void)
+static inline void
+add_credits(struct TCP_Server_Info *server, const unsigned int add)
{
- return sizeof(struct smb_hdr);
+ server->ops->add_credits(server, add);
}
-static inline size_t
-max_header_size(void)
+static inline void
+set_credits(struct TCP_Server_Info *server, const int val)
{
- return MAX_CIFS_HDR_SIZE;
+ server->ops->set_credits(server, val);
}
/*
@@ -547,8 +593,7 @@
__u64 offset;
__u64 length;
__u32 pid;
- __u8 type;
- __u16 netfid;
+ __u32 type;
};
/*
@@ -573,6 +618,10 @@
struct cifsFileInfo {
struct list_head tlist; /* pointer to next fid owned by tcon */
struct list_head flist; /* next fid (file instance) for this inode */
+ struct list_head llist; /*
+ * brlocks held by this fid, protected by
+ * lock_mutex from cifsInodeInfo structure
+ */
unsigned int uid; /* allows finding which FileInfo structure */
__u32 pid; /* process id who opened file */
__u16 netfid; /* file id from remote */
@@ -615,9 +664,12 @@
*/
struct cifsInodeInfo {
- struct list_head llist; /* brlocks for this inode */
bool can_cache_brlcks;
- struct mutex lock_mutex; /* protect two fields above */
+ struct mutex lock_mutex; /*
+ * protect the field above and llist
+ * from every cifsFileInfo structure
+ * from openFileList
+ */
/* BB add in lists for dirty pages i.e. write caching info for oplock */
struct list_head openFileList;
__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
@@ -703,7 +755,6 @@
#endif
-struct mid_q_entry;
/*
* This is the prototype for the mid receive function. This function is for
@@ -1042,12 +1093,7 @@
GLOBAL_EXTERN atomic_t midCount;
/* Misc globals */
-GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
- to be established on existing mount if we
- have the uid/password or Kerberos credential
- or equivalent for current user */
-/* enable or disable oplocks */
-GLOBAL_EXTERN bool enable_oplocks;
+GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
GLOBAL_EXTERN unsigned int lookupCacheEnabled;
GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
with more secure ntlmssp2 challenge/resp */
@@ -1074,4 +1120,11 @@
extern const struct slow_work_ops cifs_oplock_break_ops;
extern struct workqueue_struct *cifsiod_wq;
+/* Operations for different SMB versions */
+#define SMB1_VERSION_STRING "1.0"
+extern struct smb_version_operations smb1_operations;
+extern struct smb_version_values smb1_values;
+#define SMB21_VERSION_STRING "2.1"
+extern struct smb_version_operations smb21_operations;
+extern struct smb_version_values smb21_values;
#endif /* _CIFS_GLOB_H */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 96192c1..5ec21ec 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -78,6 +78,8 @@
int * /* bytes returned */ , const int long_op);
extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
char *in_buf, int flags);
+extern int cifs_setup_request(struct cifs_ses *, struct kvec *, unsigned int,
+ struct mid_q_entry **);
extern int cifs_check_receive(struct mid_q_entry *mid,
struct TCP_Server_Info *server, bool log_error);
extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
@@ -88,9 +90,6 @@
struct smb_hdr *in_buf ,
struct smb_hdr *out_buf,
int *bytes_returned);
-extern void cifs_add_credits(struct TCP_Server_Info *server,
- const unsigned int add);
-extern void cifs_set_credits(struct TCP_Server_Info *server, const int val);
extern int checkSMB(char *buf, unsigned int length);
extern bool is_valid_oplock_break(char *, struct TCP_Server_Info *);
extern bool backup_cred(struct cifs_sb_info *);
@@ -192,11 +191,13 @@
extern int CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
const char *searchName, const struct nls_table *nls_codepage,
- __u16 *searchHandle, struct cifs_search_info *psrch_inf,
+ __u16 *searchHandle, __u16 search_flags,
+ struct cifs_search_info *psrch_inf,
int map, const char dirsep);
extern int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
- __u16 searchHandle, struct cifs_search_info *psrch_inf);
+ __u16 searchHandle, __u16 search_flags,
+ struct cifs_search_info *psrch_inf);
extern int CIFSFindClose(const int, struct cifs_tcon *tcon,
const __u16 search_handle);
@@ -464,6 +465,9 @@
/* asynchronous read support */
struct cifs_readdata {
+ struct kref refcount;
+ struct list_head list;
+ struct completion done;
struct cifsFileInfo *cfile;
struct address_space *mapping;
__u64 offset;
@@ -472,12 +476,13 @@
int result;
struct list_head pages;
struct work_struct work;
+ int (*marshal_iov) (struct cifs_readdata *rdata,
+ unsigned int remaining);
unsigned int nr_iov;
struct kvec iov[1];
};
-struct cifs_readdata *cifs_readdata_alloc(unsigned int nr_pages);
-void cifs_readdata_free(struct cifs_readdata *rdata);
+void cifs_readdata_release(struct kref *refcount);
int cifs_async_readv(struct cifs_readdata *rdata);
/* asynchronous write support */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index da2f544..b5ad716 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -87,7 +87,6 @@
#endif /* CIFS_POSIX */
/* Forward declarations */
-static void cifs_readv_complete(struct work_struct *work);
/* Mark as invalid, all open files on tree connections since they
were closed when session to server was lost */
@@ -461,7 +460,7 @@
server->maxReq = min_t(unsigned int,
le16_to_cpu(rsp->MaxMpxCount),
cifs_max_pending);
- cifs_set_credits(server, server->maxReq);
+ set_credits(server, server->maxReq);
server->maxBuf = le16_to_cpu(rsp->MaxBufSize);
server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs);
/* even though we do not use raw we might as well set this
@@ -569,7 +568,7 @@
little endian */
server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount),
cifs_max_pending);
- cifs_set_credits(server, server->maxReq);
+ set_credits(server, server->maxReq);
/* probably no need to store and check maxvcs */
server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize);
server->max_rw = le32_to_cpu(pSMBr->MaxRawSize);
@@ -721,7 +720,7 @@
struct TCP_Server_Info *server = mid->callback_data;
DeleteMidQEntry(mid);
- cifs_add_credits(server, 1);
+ add_credits(server, 1);
}
int
@@ -1385,28 +1384,6 @@
return rc;
}
-struct cifs_readdata *
-cifs_readdata_alloc(unsigned int nr_pages)
-{
- struct cifs_readdata *rdata;
-
- /* readdata + 1 kvec for each page */
- rdata = kzalloc(sizeof(*rdata) +
- sizeof(struct kvec) * nr_pages, GFP_KERNEL);
- if (rdata != NULL) {
- INIT_WORK(&rdata->work, cifs_readv_complete);
- INIT_LIST_HEAD(&rdata->pages);
- }
- return rdata;
-}
-
-void
-cifs_readdata_free(struct cifs_readdata *rdata)
-{
- cifsFileInfo_put(rdata->cfile);
- kfree(rdata);
-}
-
/*
* Discard any remaining data in the current SMB. To do this, we borrow the
* current bigbuf.
@@ -1423,7 +1400,7 @@
length = cifs_read_from_socket(server, server->bigbuf,
min_t(unsigned int, remaining,
- CIFSMaxBufSize + max_header_size()));
+ CIFSMaxBufSize + MAX_HEADER_SIZE(server)));
if (length < 0)
return length;
server->total_read += length;
@@ -1434,38 +1411,14 @@
return 0;
}
-static inline size_t
-read_rsp_size(void)
-{
- return sizeof(READ_RSP);
-}
-
-static inline unsigned int
-read_data_offset(char *buf)
-{
- READ_RSP *rsp = (READ_RSP *)buf;
- return le16_to_cpu(rsp->DataOffset);
-}
-
-static inline unsigned int
-read_data_length(char *buf)
-{
- READ_RSP *rsp = (READ_RSP *)buf;
- return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
- le16_to_cpu(rsp->DataLength);
-}
-
static int
cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
{
int length, len;
- unsigned int data_offset, remaining, data_len;
+ unsigned int data_offset, data_len;
struct cifs_readdata *rdata = mid->callback_data;
char *buf = server->smallbuf;
unsigned int buflen = get_rfc1002_length(buf) + 4;
- u64 eof;
- pgoff_t eof_index;
- struct page *page, *tpage;
cFYI(1, "%s: mid=%llu offset=%llu bytes=%u", __func__,
mid->mid, rdata->offset, rdata->bytes);
@@ -1475,9 +1428,10 @@
* can if there's not enough data. At this point, we've read down to
* the Mid.
*/
- len = min_t(unsigned int, buflen, read_rsp_size()) - header_size() + 1;
+ len = min_t(unsigned int, buflen, server->vals->read_rsp_size) -
+ HEADER_SIZE(server) + 1;
- rdata->iov[0].iov_base = buf + header_size() - 1;
+ rdata->iov[0].iov_base = buf + HEADER_SIZE(server) - 1;
rdata->iov[0].iov_len = len;
length = cifs_readv_from_socket(server, rdata->iov, 1, len);
@@ -1486,7 +1440,7 @@
server->total_read += length;
/* Was the SMB read successful? */
- rdata->result = map_smb_to_linux_error(buf, false);
+ rdata->result = server->ops->map_error(buf, false);
if (rdata->result != 0) {
cFYI(1, "%s: server returned error %d", __func__,
rdata->result);
@@ -1494,14 +1448,15 @@
}
/* Is there enough to get to the rest of the READ_RSP header? */
- if (server->total_read < read_rsp_size()) {
+ if (server->total_read < server->vals->read_rsp_size) {
cFYI(1, "%s: server returned short header. got=%u expected=%zu",
- __func__, server->total_read, read_rsp_size());
+ __func__, server->total_read,
+ server->vals->read_rsp_size);
rdata->result = -EIO;
return cifs_readv_discard(server, mid);
}
- data_offset = read_data_offset(buf) + 4;
+ data_offset = server->ops->read_data_offset(buf) + 4;
if (data_offset < server->total_read) {
/*
* win2k8 sometimes sends an offset of 0 when the read
@@ -1540,7 +1495,7 @@
rdata->iov[0].iov_base, rdata->iov[0].iov_len);
/* how much data is in the response? */
- data_len = read_data_length(buf);
+ data_len = server->ops->read_data_length(buf);
if (data_offset + data_len > buflen) {
/* data_len is corrupt -- discard frame */
rdata->result = -EIO;
@@ -1548,64 +1503,8 @@
}
/* marshal up the page array */
- len = 0;
- remaining = data_len;
- rdata->nr_iov = 1;
-
- /* determine the eof that the server (probably) has */
- eof = CIFS_I(rdata->mapping->host)->server_eof;
- eof_index = eof ? (eof - 1) >> PAGE_CACHE_SHIFT : 0;
- cFYI(1, "eof=%llu eof_index=%lu", eof, eof_index);
-
- list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
- if (remaining >= PAGE_CACHE_SIZE) {
- /* enough data to fill the page */
- rdata->iov[rdata->nr_iov].iov_base = kmap(page);
- rdata->iov[rdata->nr_iov].iov_len = PAGE_CACHE_SIZE;
- cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
- rdata->nr_iov, page->index,
- rdata->iov[rdata->nr_iov].iov_base,
- rdata->iov[rdata->nr_iov].iov_len);
- ++rdata->nr_iov;
- len += PAGE_CACHE_SIZE;
- remaining -= PAGE_CACHE_SIZE;
- } else if (remaining > 0) {
- /* enough for partial page, fill and zero the rest */
- rdata->iov[rdata->nr_iov].iov_base = kmap(page);
- rdata->iov[rdata->nr_iov].iov_len = remaining;
- cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
- rdata->nr_iov, page->index,
- rdata->iov[rdata->nr_iov].iov_base,
- rdata->iov[rdata->nr_iov].iov_len);
- memset(rdata->iov[rdata->nr_iov].iov_base + remaining,
- '\0', PAGE_CACHE_SIZE - remaining);
- ++rdata->nr_iov;
- len += remaining;
- remaining = 0;
- } else if (page->index > eof_index) {
- /*
- * The VFS will not try to do readahead past the
- * i_size, but it's possible that we have outstanding
- * writes with gaps in the middle and the i_size hasn't
- * caught up yet. Populate those with zeroed out pages
- * to prevent the VFS from repeatedly attempting to
- * fill them until the writes are flushed.
- */
- zero_user(page, 0, PAGE_CACHE_SIZE);
- list_del(&page->lru);
- lru_cache_add_file(page);
- flush_dcache_page(page);
- SetPageUptodate(page);
- unlock_page(page);
- page_cache_release(page);
- } else {
- /* no need to hold page hostage */
- list_del(&page->lru);
- lru_cache_add_file(page);
- unlock_page(page);
- page_cache_release(page);
- }
- }
+ len = rdata->marshal_iov(rdata, data_len);
+ data_len -= len;
/* issue the read if we have any iovecs left to fill */
if (rdata->nr_iov > 1) {
@@ -1621,7 +1520,7 @@
rdata->bytes = length;
cFYI(1, "total_read=%u buflen=%u remaining=%u", server->total_read,
- buflen, remaining);
+ buflen, data_len);
/* discard anything left over */
if (server->total_read < buflen)
@@ -1632,33 +1531,6 @@
}
static void
-cifs_readv_complete(struct work_struct *work)
-{
- struct cifs_readdata *rdata = container_of(work,
- struct cifs_readdata, work);
- struct page *page, *tpage;
-
- list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
- list_del(&page->lru);
- lru_cache_add_file(page);
-
- if (rdata->result == 0) {
- kunmap(page);
- flush_dcache_page(page);
- SetPageUptodate(page);
- }
-
- unlock_page(page);
-
- if (rdata->result == 0)
- cifs_readpage_to_fscache(rdata->mapping->host, page);
-
- page_cache_release(page);
- }
- cifs_readdata_free(rdata);
-}
-
-static void
cifs_readv_callback(struct mid_q_entry *mid)
{
struct cifs_readdata *rdata = mid->callback_data;
@@ -1691,7 +1563,7 @@
queue_work(cifsiod_wq, &rdata->work);
DeleteMidQEntry(mid);
- cifs_add_credits(server, 1);
+ add_credits(server, 1);
}
/* cifs_async_readv - send an async write, and set up mid to handle result */
@@ -1744,12 +1616,15 @@
rdata->iov[0].iov_base = smb;
rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
+ kref_get(&rdata->refcount);
rc = cifs_call_async(tcon->ses->server, rdata->iov, 1,
cifs_readv_receive, cifs_readv_callback,
rdata, false);
if (rc == 0)
cifs_stats_inc(&tcon->num_reads);
+ else
+ kref_put(&rdata->refcount, cifs_readdata_release);
cifs_small_buf_release(smb);
return rc;
@@ -2135,7 +2010,7 @@
queue_work(cifsiod_wq, &wdata->work);
DeleteMidQEntry(mid);
- cifs_add_credits(tcon->ses->server, 1);
+ add_credits(tcon->ses->server, 1);
}
/* cifs_async_writev - send an async write, and set up mid to handle result */
@@ -4344,7 +4219,7 @@
CIFSFindFirst(const int xid, struct cifs_tcon *tcon,
const char *searchName,
const struct nls_table *nls_codepage,
- __u16 *pnetfid,
+ __u16 *pnetfid, __u16 search_flags,
struct cifs_search_info *psrch_inf, int remap, const char dirsep)
{
/* level 257 SMB_ */
@@ -4416,8 +4291,7 @@
cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
ATTR_DIRECTORY);
pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
- pSMB->SearchFlags = cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END |
- CIFS_SEARCH_RETURN_RESUME);
+ pSMB->SearchFlags = cpu_to_le16(search_flags);
pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
/* BB what should we set StorageType to? Does it matter? BB */
@@ -4487,8 +4361,8 @@
return rc;
}
-int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
- __u16 searchHandle, struct cifs_search_info *psrch_inf)
+int CIFSFindNext(const int xid, struct cifs_tcon *tcon, __u16 searchHandle,
+ __u16 search_flags, struct cifs_search_info *psrch_inf)
{
TRANSACTION2_FNEXT_REQ *pSMB = NULL;
TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
@@ -4531,8 +4405,7 @@
cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
pSMB->ResumeKey = psrch_inf->resume_key;
- pSMB->SearchFlags =
- cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME);
+ pSMB->SearchFlags = cpu_to_le16(search_flags);
name_len = psrch_inf->resume_name_len;
params += name_len;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e0b56d7..ccafded 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1,7 +1,7 @@
/*
* fs/cifs/connect.c
*
- * Copyright (C) International Business Machines Corp., 2002,2009
+ * Copyright (C) International Business Machines Corp., 2002,2011
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
@@ -102,7 +102,7 @@
Opt_srcaddr, Opt_prefixpath,
Opt_iocharset, Opt_sockopt,
Opt_netbiosname, Opt_servern,
- Opt_ver, Opt_sec,
+ Opt_ver, Opt_vers, Opt_sec, Opt_cache,
/* Mount options to be ignored */
Opt_ignore,
@@ -210,9 +210,9 @@
{ Opt_netbiosname, "netbiosname=%s" },
{ Opt_servern, "servern=%s" },
{ Opt_ver, "ver=%s" },
- { Opt_ver, "vers=%s" },
- { Opt_ver, "version=%s" },
+ { Opt_vers, "vers=%s" },
{ Opt_sec, "sec=%s" },
+ { Opt_cache, "cache=%s" },
{ Opt_ignore, "cred" },
{ Opt_ignore, "credentials" },
@@ -261,6 +261,26 @@
{ Opt_sec_err, NULL }
};
+/* cache flavors */
+enum {
+ Opt_cache_loose,
+ Opt_cache_strict,
+ Opt_cache_none,
+ Opt_cache_err
+};
+
+static const match_table_t cifs_cacheflavor_tokens = {
+ { Opt_cache_loose, "loose" },
+ { Opt_cache_strict, "strict" },
+ { Opt_cache_none, "none" },
+ { Opt_cache_err, NULL }
+};
+
+static const match_table_t cifs_smb_version_tokens = {
+ { Smb_1, SMB1_VERSION_STRING },
+ { Smb_21, SMB21_VERSION_STRING },
+};
+
static int ip_connect(struct TCP_Server_Info *server);
static int generic_ip_connect(struct TCP_Server_Info *server);
static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
@@ -549,7 +569,7 @@
}
} else if (server->large_buf) {
/* we are reusing a dirty large buf, clear its start */
- memset(server->bigbuf, 0, header_size());
+ memset(server->bigbuf, 0, HEADER_SIZE(server));
}
if (!server->smallbuf) {
@@ -563,7 +583,7 @@
/* beginning of smb buffer is cleared in our buf_get */
} else {
/* if existing small buf clear beginning */
- memset(server->smallbuf, 0, header_size());
+ memset(server->smallbuf, 0, HEADER_SIZE(server));
}
return true;
@@ -764,25 +784,6 @@
return false;
}
-static struct mid_q_entry *
-find_mid(struct TCP_Server_Info *server, char *buffer)
-{
- struct smb_hdr *buf = (struct smb_hdr *)buffer;
- struct mid_q_entry *mid;
-
- spin_lock(&GlobalMid_Lock);
- list_for_each_entry(mid, &server->pending_mid_q, qhead) {
- if (mid->mid == buf->Mid &&
- mid->mid_state == MID_REQUEST_SUBMITTED &&
- le16_to_cpu(mid->command) == buf->Command) {
- spin_unlock(&GlobalMid_Lock);
- return mid;
- }
- }
- spin_unlock(&GlobalMid_Lock);
- return NULL;
-}
-
void
dequeue_mid(struct mid_q_entry *mid, bool malformed)
{
@@ -934,7 +935,7 @@
unsigned int pdu_length = get_rfc1002_length(buf);
/* make sure this will fit in a large buffer */
- if (pdu_length > CIFSMaxBufSize + max_header_size() - 4) {
+ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
cERROR(1, "SMB response too long (%u bytes)",
pdu_length);
cifs_reconnect(server);
@@ -950,8 +951,8 @@
}
/* now read the rest */
- length = cifs_read_from_socket(server, buf + header_size() - 1,
- pdu_length - header_size() + 1 + 4);
+ length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
+ pdu_length - HEADER_SIZE(server) + 1 + 4);
if (length < 0)
return length;
server->total_read += length;
@@ -967,7 +968,7 @@
* 48 bytes is enough to display the header and a little bit
* into the payload for debugging purposes.
*/
- length = checkSMB(buf, server->total_read);
+ length = server->ops->check_message(buf, server->total_read);
if (length != 0)
cifs_dump_mem("Bad SMB: ", buf,
min_t(unsigned int, server->total_read, 48));
@@ -1025,7 +1026,7 @@
continue;
/* make sure we have enough to get to the MID */
- if (pdu_length < header_size() - 1 - 4) {
+ if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
cERROR(1, "SMB response too short (%u bytes)",
pdu_length);
cifs_reconnect(server);
@@ -1035,12 +1036,12 @@
/* read down to the MID */
length = cifs_read_from_socket(server, buf + 4,
- header_size() - 1 - 4);
+ HEADER_SIZE(server) - 1 - 4);
if (length < 0)
continue;
server->total_read += length;
- mid_entry = find_mid(server, buf);
+ mid_entry = server->ops->find_mid(server, buf);
if (!mid_entry || !mid_entry->receive)
length = standard_receive3(server, mid_entry);
@@ -1057,12 +1058,13 @@
if (mid_entry != NULL) {
if (!mid_entry->multiRsp || mid_entry->multiEnd)
mid_entry->callback(mid_entry);
- } else if (!is_valid_oplock_break(buf, server)) {
+ } else if (!server->ops->is_oplock_break(buf, server)) {
cERROR(1, "No task to wake, unknown frame received! "
"NumMids %d", atomic_read(&midCount));
- cifs_dump_mem("Received Data is: ", buf, header_size());
+ cifs_dump_mem("Received Data is: ", buf,
+ HEADER_SIZE(server));
#ifdef CONFIG_CIFS_DEBUG2
- cifs_dump_detail(buf);
+ server->ops->dump_detail(buf);
cifs_dump_mids(server);
#endif /* CIFS_DEBUG2 */
@@ -1186,6 +1188,54 @@
}
static int
+cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+ switch (match_token(value, cifs_cacheflavor_tokens, args)) {
+ case Opt_cache_loose:
+ vol->direct_io = false;
+ vol->strict_io = false;
+ break;
+ case Opt_cache_strict:
+ vol->direct_io = false;
+ vol->strict_io = true;
+ break;
+ case Opt_cache_none:
+ vol->direct_io = true;
+ vol->strict_io = false;
+ break;
+ default:
+ cERROR(1, "bad cache= option: %s", value);
+ return 1;
+ }
+ return 0;
+}
+
+static int
+cifs_parse_smb_version(char *value, struct smb_vol *vol)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+ switch (match_token(value, cifs_smb_version_tokens, args)) {
+ case Smb_1:
+ vol->ops = &smb1_operations;
+ vol->vals = &smb1_values;
+ break;
+#ifdef CONFIG_CIFS_SMB2
+ case Smb_21:
+ vol->ops = &smb21_operations;
+ vol->vals = &smb21_values;
+ break;
+#endif
+ default:
+ cERROR(1, "Unknown vers= option specified: %s", value);
+ return 1;
+ }
+ return 0;
+}
+
+static int
cifs_parse_mount_options(const char *mountdata, const char *devname,
struct smb_vol *vol)
{
@@ -1203,6 +1253,8 @@
char *string = NULL;
char *tmp_end, *value;
char delim;
+ bool cache_specified = false;
+ static bool cache_warned = false;
separator[0] = ',';
separator[1] = 0;
@@ -1236,6 +1288,10 @@
vol->actimeo = CIFS_DEF_ACTIMEO;
+ /* FIXME: add autonegotiation -- for now, SMB1 is default */
+ vol->ops = &smb1_operations;
+ vol->vals = &smb1_values;
+
if (!mountdata)
goto cifs_parse_mount_err;
@@ -1414,10 +1470,20 @@
vol->seal = 1;
break;
case Opt_direct:
- vol->direct_io = 1;
+ cache_specified = true;
+ vol->direct_io = true;
+ vol->strict_io = false;
+ cERROR(1, "The \"directio\" option will be removed in "
+ "3.7. Please switch to the \"cache=none\" "
+ "option.");
break;
case Opt_strictcache:
- vol->strict_io = 1;
+ cache_specified = true;
+ vol->direct_io = false;
+ vol->strict_io = true;
+ cERROR(1, "The \"strictcache\" option will be removed "
+ "in 3.7. Please switch to the \"cache=strict\" "
+ "option.");
break;
case Opt_noac:
printk(KERN_WARNING "CIFS: Mount option noac not "
@@ -1821,8 +1887,7 @@
if (string == NULL)
goto out_nomem;
- if (strnicmp(string, "cifs", 4) == 0 ||
- strnicmp(string, "1", 1) == 0) {
+ if (strnicmp(string, "1", 1) == 0) {
/* This is the default */
break;
}
@@ -1830,6 +1895,14 @@
printk(KERN_WARNING "CIFS: Invalid version"
" specified\n");
goto cifs_parse_mount_err;
+ case Opt_vers:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+
+ if (cifs_parse_smb_version(string, vol) != 0)
+ goto cifs_parse_mount_err;
+ break;
case Opt_sec:
string = match_strdup(args);
if (string == NULL)
@@ -1838,6 +1911,15 @@
if (cifs_parse_security_flavors(string, vol) != 0)
goto cifs_parse_mount_err;
break;
+ case Opt_cache:
+ cache_specified = true;
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+
+ if (cifs_parse_cache_flavor(string, vol) != 0)
+ goto cifs_parse_mount_err;
+ break;
default:
/*
* An option we don't recognize. Save it off for later
@@ -1881,6 +1963,14 @@
printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
"specified with no gid= option.\n");
+ /* FIXME: remove this block in 3.7 */
+ if (!cache_specified && !cache_warned) {
+ cache_warned = true;
+ printk(KERN_NOTICE "CIFS: no cache= option specified, using "
+ "\"cache=loose\". This default will change "
+ "to \"cache=strict\" in 3.7.\n");
+ }
+
kfree(mountdata_copy);
return 0;
@@ -2041,6 +2131,9 @@
static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
struct smb_vol *vol)
{
+ if ((server->vals != vol->vals) || (server->ops != vol->ops))
+ return 0;
+
if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
return 0;
@@ -2163,6 +2256,8 @@
goto out_err;
}
+ tcp_ses->ops = volume_info->ops;
+ tcp_ses->vals = volume_info->vals;
cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
tcp_ses->hostname = extract_hostname(volume_info->UNC);
if (IS_ERR(tcp_ses->hostname)) {
@@ -3569,6 +3664,7 @@
if (cifs_parse_mount_options(mount_data, devname, volume_info))
return -EINVAL;
+
if (volume_info->nullauth) {
cFYI(1, "Anonymous login");
kfree(volume_info->username);
@@ -4010,11 +4106,11 @@
if (server->maxBuf != 0)
return 0;
- cifs_set_credits(server, 1);
+ set_credits(server, 1);
rc = CIFSSMBNegotiate(xid, ses);
if (rc == -EAGAIN) {
/* retry only once on 1st time connection */
- cifs_set_credits(server, 1);
+ set_credits(server, 1);
rc = CIFSSMBNegotiate(xid, ses);
if (rc == -EAGAIN)
rc = -EHOSTDOWN;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 81725e9..253170d 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -264,6 +264,7 @@
pCifsFile->tlink = cifs_get_tlink(tlink);
mutex_init(&pCifsFile->fh_mutex);
INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break);
+ INIT_LIST_HEAD(&pCifsFile->llist);
spin_lock(&cifs_file_list_lock);
list_add(&pCifsFile->tlist, &(tlink_tcon(tlink)->openFileList));
@@ -334,9 +335,7 @@
* is closed anyway.
*/
mutex_lock(&cifsi->lock_mutex);
- list_for_each_entry_safe(li, tmp, &cifsi->llist, llist) {
- if (li->netfid != cifs_file->netfid)
- continue;
+ list_for_each_entry_safe(li, tmp, &cifs_file->llist, llist) {
list_del(&li->llist);
cifs_del_lock_waiters(li);
kfree(li);
@@ -645,7 +644,7 @@
}
static struct cifsLockInfo *
-cifs_lock_init(__u64 offset, __u64 length, __u8 type, __u16 netfid)
+cifs_lock_init(__u64 offset, __u64 length, __u8 type)
{
struct cifsLockInfo *lock =
kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL);
@@ -654,7 +653,6 @@
lock->offset = offset;
lock->length = length;
lock->type = type;
- lock->netfid = netfid;
lock->pid = current->tgid;
INIT_LIST_HEAD(&lock->blist);
init_waitqueue_head(&lock->block_q);
@@ -672,19 +670,20 @@
}
static bool
-__cifs_find_lock_conflict(struct cifsInodeInfo *cinode, __u64 offset,
- __u64 length, __u8 type, __u16 netfid,
- struct cifsLockInfo **conf_lock)
+cifs_find_fid_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
+ __u64 length, __u8 type, struct cifsFileInfo *cur,
+ struct cifsLockInfo **conf_lock)
{
- struct cifsLockInfo *li, *tmp;
+ struct cifsLockInfo *li;
+ struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
- list_for_each_entry_safe(li, tmp, &cinode->llist, llist) {
+ list_for_each_entry(li, &cfile->llist, llist) {
if (offset + length <= li->offset ||
offset >= li->offset + li->length)
continue;
- else if ((type & LOCKING_ANDX_SHARED_LOCK) &&
- ((netfid == li->netfid && current->tgid == li->pid) ||
- type == li->type))
+ else if ((type & server->vals->shared_lock_type) &&
+ ((server->ops->compare_fids(cur, cfile) &&
+ current->tgid == li->pid) || type == li->type))
continue;
else {
*conf_lock = li;
@@ -695,11 +694,23 @@
}
static bool
-cifs_find_lock_conflict(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
- struct cifsLockInfo **conf_lock)
+cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
+ __u8 type, struct cifsLockInfo **conf_lock)
{
- return __cifs_find_lock_conflict(cinode, lock->offset, lock->length,
- lock->type, lock->netfid, conf_lock);
+ bool rc = false;
+ struct cifsFileInfo *fid, *tmp;
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
+
+ spin_lock(&cifs_file_list_lock);
+ list_for_each_entry_safe(fid, tmp, &cinode->openFileList, flist) {
+ rc = cifs_find_fid_lock_conflict(fid, offset, length, type,
+ cfile, conf_lock);
+ if (rc)
+ break;
+ }
+ spin_unlock(&cifs_file_list_lock);
+
+ return rc;
}
/*
@@ -710,22 +721,24 @@
* the server or 1 otherwise.
*/
static int
-cifs_lock_test(struct cifsInodeInfo *cinode, __u64 offset, __u64 length,
- __u8 type, __u16 netfid, struct file_lock *flock)
+cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length,
+ __u8 type, struct file_lock *flock)
{
int rc = 0;
struct cifsLockInfo *conf_lock;
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
+ struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
bool exist;
mutex_lock(&cinode->lock_mutex);
- exist = __cifs_find_lock_conflict(cinode, offset, length, type, netfid,
- &conf_lock);
+ exist = cifs_find_lock_conflict(cfile, offset, length, type,
+ &conf_lock);
if (exist) {
flock->fl_start = conf_lock->offset;
flock->fl_end = conf_lock->offset + conf_lock->length - 1;
flock->fl_pid = conf_lock->pid;
- if (conf_lock->type & LOCKING_ANDX_SHARED_LOCK)
+ if (conf_lock->type & server->vals->shared_lock_type)
flock->fl_type = F_RDLCK;
else
flock->fl_type = F_WRLCK;
@@ -739,10 +752,11 @@
}
static void
-cifs_lock_add(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock)
+cifs_lock_add(struct cifsFileInfo *cfile, struct cifsLockInfo *lock)
{
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
mutex_lock(&cinode->lock_mutex);
- list_add_tail(&lock->llist, &cinode->llist);
+ list_add_tail(&lock->llist, &cfile->llist);
mutex_unlock(&cinode->lock_mutex);
}
@@ -753,10 +767,11 @@
* 3) -EACCESS, if there is a lock that prevents us and wait is false.
*/
static int
-cifs_lock_add_if(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
+cifs_lock_add_if(struct cifsFileInfo *cfile, struct cifsLockInfo *lock,
bool wait)
{
struct cifsLockInfo *conf_lock;
+ struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
bool exist;
int rc = 0;
@@ -764,9 +779,10 @@
exist = false;
mutex_lock(&cinode->lock_mutex);
- exist = cifs_find_lock_conflict(cinode, lock, &conf_lock);
+ exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length,
+ lock->type, &conf_lock);
if (!exist && cinode->can_cache_brlcks) {
- list_add_tail(&lock->llist, &cinode->llist);
+ list_add_tail(&lock->llist, &cfile->llist);
mutex_unlock(&cinode->lock_mutex);
return rc;
}
@@ -888,7 +904,7 @@
for (i = 0; i < 2; i++) {
cur = buf;
num = 0;
- list_for_each_entry_safe(li, tmp, &cinode->llist, llist) {
+ list_for_each_entry_safe(li, tmp, &cfile->llist, llist) {
if (li->type != types[i])
continue;
cur->Pid = cpu_to_le16(li->pid);
@@ -898,7 +914,8 @@
cur->OffsetHigh = cpu_to_le32((u32)(li->offset>>32));
if (++num == max_num) {
stored_rc = cifs_lockv(xid, tcon, cfile->netfid,
- li->type, 0, num, buf);
+ (__u8)li->type, 0, num,
+ buf);
if (stored_rc)
rc = stored_rc;
cur = buf;
@@ -909,7 +926,7 @@
if (num) {
stored_rc = cifs_lockv(xid, tcon, cfile->netfid,
- types[i], 0, num, buf);
+ (__u8)types[i], 0, num, buf);
if (stored_rc)
rc = stored_rc;
}
@@ -1053,8 +1070,8 @@
}
static void
-cifs_read_flock(struct file_lock *flock, __u8 *type, int *lock, int *unlock,
- bool *wait_flag)
+cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock,
+ bool *wait_flag, struct TCP_Server_Info *server)
{
if (flock->fl_flags & FL_POSIX)
cFYI(1, "Posix");
@@ -1073,38 +1090,50 @@
(~(FL_POSIX | FL_FLOCK | FL_SLEEP | FL_ACCESS | FL_LEASE)))
cFYI(1, "Unknown lock flags 0x%x", flock->fl_flags);
- *type = LOCKING_ANDX_LARGE_FILES;
+ *type = server->vals->large_lock_type;
if (flock->fl_type == F_WRLCK) {
cFYI(1, "F_WRLCK ");
+ *type |= server->vals->exclusive_lock_type;
*lock = 1;
} else if (flock->fl_type == F_UNLCK) {
cFYI(1, "F_UNLCK");
+ *type |= server->vals->unlock_lock_type;
*unlock = 1;
/* Check if unlock includes more than one lock range */
} else if (flock->fl_type == F_RDLCK) {
cFYI(1, "F_RDLCK");
- *type |= LOCKING_ANDX_SHARED_LOCK;
+ *type |= server->vals->shared_lock_type;
*lock = 1;
} else if (flock->fl_type == F_EXLCK) {
cFYI(1, "F_EXLCK");
+ *type |= server->vals->exclusive_lock_type;
*lock = 1;
} else if (flock->fl_type == F_SHLCK) {
cFYI(1, "F_SHLCK");
- *type |= LOCKING_ANDX_SHARED_LOCK;
+ *type |= server->vals->shared_lock_type;
*lock = 1;
} else
cFYI(1, "Unknown type of lock");
}
static int
-cifs_getlk(struct file *file, struct file_lock *flock, __u8 type,
+cifs_mandatory_lock(int xid, struct cifsFileInfo *cfile, __u64 offset,
+ __u64 length, __u32 type, int lock, int unlock, bool wait)
+{
+ return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->netfid,
+ current->tgid, length, offset, unlock, lock,
+ (__u8)type, wait, 0);
+}
+
+static int
+cifs_getlk(struct file *file, struct file_lock *flock, __u32 type,
bool wait_flag, bool posix_lck, int xid)
{
int rc = 0;
__u64 length = 1 + flock->fl_end - flock->fl_start;
struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
- struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
+ struct TCP_Server_Info *server = tcon->ses->server;
__u16 netfid = cfile->netfid;
if (posix_lck) {
@@ -1114,7 +1143,7 @@
if (!rc)
return rc;
- if (type & LOCKING_ANDX_SHARED_LOCK)
+ if (type & server->vals->shared_lock_type)
posix_lock_type = CIFS_RDLCK;
else
posix_lock_type = CIFS_WRLCK;
@@ -1124,38 +1153,35 @@
return rc;
}
- rc = cifs_lock_test(cinode, flock->fl_start, length, type, netfid,
- flock);
+ rc = cifs_lock_test(cfile, flock->fl_start, length, type, flock);
if (!rc)
return rc;
/* BB we could chain these into one lock request BB */
- rc = CIFSSMBLock(xid, tcon, netfid, current->tgid, length,
- flock->fl_start, 0, 1, type, 0, 0);
+ rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, type,
+ 1, 0, false);
if (rc == 0) {
- rc = CIFSSMBLock(xid, tcon, netfid, current->tgid,
- length, flock->fl_start, 1, 0,
- type, 0, 0);
+ rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length,
+ type, 0, 1, false);
flock->fl_type = F_UNLCK;
if (rc != 0)
cERROR(1, "Error unlocking previously locked "
- "range %d during test of lock", rc);
+ "range %d during test of lock", rc);
return 0;
}
- if (type & LOCKING_ANDX_SHARED_LOCK) {
+ if (type & server->vals->shared_lock_type) {
flock->fl_type = F_WRLCK;
return 0;
}
- rc = CIFSSMBLock(xid, tcon, netfid, current->tgid, length,
- flock->fl_start, 0, 1,
- type | LOCKING_ANDX_SHARED_LOCK, 0, 0);
+ rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length,
+ type | server->vals->shared_lock_type, 1, 0,
+ false);
if (rc == 0) {
- rc = CIFSSMBLock(xid, tcon, netfid, current->tgid,
- length, flock->fl_start, 1, 0,
- type | LOCKING_ANDX_SHARED_LOCK,
- 0, 0);
+ rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length,
+ type | server->vals->shared_lock_type,
+ 0, 1, false);
flock->fl_type = F_RDLCK;
if (rc != 0)
cERROR(1, "Error unlocking previously locked "
@@ -1212,15 +1238,13 @@
for (i = 0; i < 2; i++) {
cur = buf;
num = 0;
- list_for_each_entry_safe(li, tmp, &cinode->llist, llist) {
+ list_for_each_entry_safe(li, tmp, &cfile->llist, llist) {
if (flock->fl_start > li->offset ||
(flock->fl_start + length) <
(li->offset + li->length))
continue;
if (current->tgid != li->pid)
continue;
- if (cfile->netfid != li->netfid)
- continue;
if (types[i] != li->type)
continue;
if (!cinode->can_cache_brlcks) {
@@ -1233,7 +1257,7 @@
cpu_to_le32((u32)(li->offset>>32));
/*
* We need to save a lock here to let us add
- * it again to the inode list if the unlock
+ * it again to the file's list if the unlock
* range request fails on the server.
*/
list_move(&li->llist, &tmp_llist);
@@ -1247,10 +1271,10 @@
* We failed on the unlock range
* request - add all locks from
* the tmp list to the head of
- * the inode list.
+ * the file's list.
*/
cifs_move_llist(&tmp_llist,
- &cinode->llist);
+ &cfile->llist);
rc = stored_rc;
} else
/*
@@ -1265,7 +1289,7 @@
} else {
/*
* We can cache brlock requests - simply remove
- * a lock from the inode list.
+ * a lock from the file's list.
*/
list_del(&li->llist);
cifs_del_lock_waiters(li);
@@ -1276,7 +1300,7 @@
stored_rc = cifs_lockv(xid, tcon, cfile->netfid,
types[i], num, 0, buf);
if (stored_rc) {
- cifs_move_llist(&tmp_llist, &cinode->llist);
+ cifs_move_llist(&tmp_llist, &cfile->llist);
rc = stored_rc;
} else
cifs_free_llist(&tmp_llist);
@@ -1289,14 +1313,14 @@
}
static int
-cifs_setlk(struct file *file, struct file_lock *flock, __u8 type,
+cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
bool wait_flag, bool posix_lck, int lock, int unlock, int xid)
{
int rc = 0;
__u64 length = 1 + flock->fl_end - flock->fl_start;
struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data;
struct cifs_tcon *tcon = tlink_tcon(cfile->tlink);
- struct cifsInodeInfo *cinode = CIFS_I(file->f_path.dentry->d_inode);
+ struct TCP_Server_Info *server = tcon->ses->server;
__u16 netfid = cfile->netfid;
if (posix_lck) {
@@ -1306,7 +1330,7 @@
if (!rc || rc < 0)
return rc;
- if (type & LOCKING_ANDX_SHARED_LOCK)
+ if (type & server->vals->shared_lock_type)
posix_lock_type = CIFS_RDLCK;
else
posix_lock_type = CIFS_WRLCK;
@@ -1323,24 +1347,24 @@
if (lock) {
struct cifsLockInfo *lock;
- lock = cifs_lock_init(flock->fl_start, length, type, netfid);
+ lock = cifs_lock_init(flock->fl_start, length, type);
if (!lock)
return -ENOMEM;
- rc = cifs_lock_add_if(cinode, lock, wait_flag);
+ rc = cifs_lock_add_if(cfile, lock, wait_flag);
if (rc < 0)
kfree(lock);
if (rc <= 0)
goto out;
- rc = CIFSSMBLock(xid, tcon, netfid, current->tgid, length,
- flock->fl_start, 0, 1, type, wait_flag, 0);
+ rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length,
+ type, 1, 0, wait_flag);
if (rc) {
kfree(lock);
goto out;
}
- cifs_lock_add(cinode, lock);
+ cifs_lock_add(cfile, lock);
} else if (unlock)
rc = cifs_unlock_range(cfile, flock, xid);
@@ -1361,7 +1385,7 @@
struct cifsInodeInfo *cinode;
struct cifsFileInfo *cfile;
__u16 netfid;
- __u8 type;
+ __u32 type;
rc = -EACCES;
xid = GetXid();
@@ -1370,11 +1394,13 @@
"end: %lld", cmd, flock->fl_flags, flock->fl_type,
flock->fl_start, flock->fl_end);
- cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag);
-
- cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
cfile = (struct cifsFileInfo *)file->private_data;
tcon = tlink_tcon(cfile->tlink);
+
+ cifs_read_flock(flock, &type, &lock, &unlock, &wait_flag,
+ tcon->ses->server);
+
+ cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
netfid = cfile->netfid;
cinode = CIFS_I(file->f_path.dentry->d_inode);
@@ -1539,10 +1565,11 @@
struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode,
bool fsuid_only)
{
- struct cifsFileInfo *open_file;
+ struct cifsFileInfo *open_file, *inv_file = NULL;
struct cifs_sb_info *cifs_sb;
bool any_available = false;
int rc;
+ unsigned int refind = 0;
/* Having a null inode here (because mapping->host was set to zero by
the VFS or MM) should not happen but we had reports of on oops (due to
@@ -1562,40 +1589,25 @@
spin_lock(&cifs_file_list_lock);
refind_writable:
+ if (refind > MAX_REOPEN_ATT) {
+ spin_unlock(&cifs_file_list_lock);
+ return NULL;
+ }
list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
if (!any_available && open_file->pid != current->tgid)
continue;
if (fsuid_only && open_file->uid != current_fsuid())
continue;
if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) {
- cifsFileInfo_get(open_file);
-
if (!open_file->invalidHandle) {
/* found a good writable file */
+ cifsFileInfo_get(open_file);
spin_unlock(&cifs_file_list_lock);
return open_file;
+ } else {
+ if (!inv_file)
+ inv_file = open_file;
}
-
- spin_unlock(&cifs_file_list_lock);
-
- /* Had to unlock since following call can block */
- rc = cifs_reopen_file(open_file, false);
- if (!rc)
- return open_file;
-
- /* if it fails, try another handle if possible */
- cFYI(1, "wp failed on reopen file");
- cifsFileInfo_put(open_file);
-
- spin_lock(&cifs_file_list_lock);
-
- /* else we simply continue to the next entry. Thus
- we do not loop on reopen errors. If we
- can not reopen the file, for example if we
- reconnected to a server with another client
- racing to delete or lock the file we would not
- make progress if we restarted before the beginning
- of the loop here. */
}
}
/* couldn't find useable FH with same pid, try any available */
@@ -1603,7 +1615,30 @@
any_available = true;
goto refind_writable;
}
+
+ if (inv_file) {
+ any_available = false;
+ cifsFileInfo_get(inv_file);
+ }
+
spin_unlock(&cifs_file_list_lock);
+
+ if (inv_file) {
+ rc = cifs_reopen_file(inv_file, false);
+ if (!rc)
+ return inv_file;
+ else {
+ spin_lock(&cifs_file_list_lock);
+ list_move_tail(&inv_file->flist,
+ &cifs_inode->openFileList);
+ spin_unlock(&cifs_file_list_lock);
+ cifsFileInfo_put(inv_file);
+ spin_lock(&cifs_file_list_lock);
+ ++refind;
+ goto refind_writable;
+ }
+ }
+
return NULL;
}
@@ -2339,24 +2374,224 @@
return cifs_user_writev(iocb, iov, nr_segs, pos);
}
+static struct cifs_readdata *
+cifs_readdata_alloc(unsigned int nr_vecs, work_func_t complete)
+{
+ struct cifs_readdata *rdata;
+
+ rdata = kzalloc(sizeof(*rdata) +
+ sizeof(struct kvec) * nr_vecs, GFP_KERNEL);
+ if (rdata != NULL) {
+ kref_init(&rdata->refcount);
+ INIT_LIST_HEAD(&rdata->list);
+ init_completion(&rdata->done);
+ INIT_WORK(&rdata->work, complete);
+ INIT_LIST_HEAD(&rdata->pages);
+ }
+ return rdata;
+}
+
+void
+cifs_readdata_release(struct kref *refcount)
+{
+ struct cifs_readdata *rdata = container_of(refcount,
+ struct cifs_readdata, refcount);
+
+ if (rdata->cfile)
+ cifsFileInfo_put(rdata->cfile);
+
+ kfree(rdata);
+}
+
+static int
+cifs_read_allocate_pages(struct list_head *list, unsigned int npages)
+{
+ int rc = 0;
+ struct page *page, *tpage;
+ unsigned int i;
+
+ for (i = 0; i < npages; i++) {
+ page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
+ if (!page) {
+ rc = -ENOMEM;
+ break;
+ }
+ list_add(&page->lru, list);
+ }
+
+ if (rc) {
+ list_for_each_entry_safe(page, tpage, list, lru) {
+ list_del(&page->lru);
+ put_page(page);
+ }
+ }
+ return rc;
+}
+
+static void
+cifs_uncached_readdata_release(struct kref *refcount)
+{
+ struct page *page, *tpage;
+ struct cifs_readdata *rdata = container_of(refcount,
+ struct cifs_readdata, refcount);
+
+ list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
+ list_del(&page->lru);
+ put_page(page);
+ }
+ cifs_readdata_release(refcount);
+}
+
+static int
+cifs_retry_async_readv(struct cifs_readdata *rdata)
+{
+ int rc;
+
+ do {
+ if (rdata->cfile->invalidHandle) {
+ rc = cifs_reopen_file(rdata->cfile, true);
+ if (rc != 0)
+ continue;
+ }
+ rc = cifs_async_readv(rdata);
+ } while (rc == -EAGAIN);
+
+ return rc;
+}
+
+/**
+ * cifs_readdata_to_iov - copy data from pages in response to an iovec
+ * @rdata: the readdata response with list of pages holding data
+ * @iov: vector in which we should copy the data
+ * @nr_segs: number of segments in vector
+ * @offset: offset into file of the first iovec
+ * @copied: used to return the amount of data copied to the iov
+ *
+ * This function copies data from a list of pages in a readdata response into
+ * an array of iovecs. It will first calculate where the data should go
+ * based on the info in the readdata and then copy the data into that spot.
+ */
+static ssize_t
+cifs_readdata_to_iov(struct cifs_readdata *rdata, const struct iovec *iov,
+ unsigned long nr_segs, loff_t offset, ssize_t *copied)
+{
+ int rc = 0;
+ struct iov_iter ii;
+ size_t pos = rdata->offset - offset;
+ struct page *page, *tpage;
+ ssize_t remaining = rdata->bytes;
+ unsigned char *pdata;
+
+ /* set up iov_iter and advance to the correct offset */
+ iov_iter_init(&ii, iov, nr_segs, iov_length(iov, nr_segs), 0);
+ iov_iter_advance(&ii, pos);
+
+ *copied = 0;
+ list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
+ ssize_t copy;
+
+ /* copy a whole page or whatever's left */
+ copy = min_t(ssize_t, remaining, PAGE_SIZE);
+
+ /* ...but limit it to whatever space is left in the iov */
+ copy = min_t(ssize_t, copy, iov_iter_count(&ii));
+
+ /* go while there's data to be copied and no errors */
+ if (copy && !rc) {
+ pdata = kmap(page);
+ rc = memcpy_toiovecend(ii.iov, pdata, ii.iov_offset,
+ (int)copy);
+ kunmap(page);
+ if (!rc) {
+ *copied += copy;
+ remaining -= copy;
+ iov_iter_advance(&ii, copy);
+ }
+ }
+
+ list_del(&page->lru);
+ put_page(page);
+ }
+
+ return rc;
+}
+
+static void
+cifs_uncached_readv_complete(struct work_struct *work)
+{
+ struct cifs_readdata *rdata = container_of(work,
+ struct cifs_readdata, work);
+
+ /* if the result is non-zero then the pages weren't kmapped */
+ if (rdata->result == 0) {
+ struct page *page;
+
+ list_for_each_entry(page, &rdata->pages, lru)
+ kunmap(page);
+ }
+
+ complete(&rdata->done);
+ kref_put(&rdata->refcount, cifs_uncached_readdata_release);
+}
+
+static int
+cifs_uncached_read_marshal_iov(struct cifs_readdata *rdata,
+ unsigned int remaining)
+{
+ int len = 0;
+ struct page *page, *tpage;
+
+ rdata->nr_iov = 1;
+ list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
+ if (remaining >= PAGE_SIZE) {
+ /* enough data to fill the page */
+ rdata->iov[rdata->nr_iov].iov_base = kmap(page);
+ rdata->iov[rdata->nr_iov].iov_len = PAGE_SIZE;
+ cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
+ rdata->nr_iov, page->index,
+ rdata->iov[rdata->nr_iov].iov_base,
+ rdata->iov[rdata->nr_iov].iov_len);
+ ++rdata->nr_iov;
+ len += PAGE_SIZE;
+ remaining -= PAGE_SIZE;
+ } else if (remaining > 0) {
+ /* enough for partial page, fill and zero the rest */
+ rdata->iov[rdata->nr_iov].iov_base = kmap(page);
+ rdata->iov[rdata->nr_iov].iov_len = remaining;
+ cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
+ rdata->nr_iov, page->index,
+ rdata->iov[rdata->nr_iov].iov_base,
+ rdata->iov[rdata->nr_iov].iov_len);
+ memset(rdata->iov[rdata->nr_iov].iov_base + remaining,
+ '\0', PAGE_SIZE - remaining);
+ ++rdata->nr_iov;
+ len += remaining;
+ remaining = 0;
+ } else {
+ /* no need to hold page hostage */
+ list_del(&page->lru);
+ put_page(page);
+ }
+ }
+
+ return len;
+}
+
static ssize_t
cifs_iovec_read(struct file *file, const struct iovec *iov,
unsigned long nr_segs, loff_t *poffset)
{
- int rc;
- int xid;
- ssize_t total_read;
- unsigned int bytes_read = 0;
+ ssize_t rc;
size_t len, cur_len;
- int iov_offset = 0;
+ ssize_t total_read = 0;
+ loff_t offset = *poffset;
+ unsigned int npages;
struct cifs_sb_info *cifs_sb;
- struct cifs_tcon *pTcon;
+ struct cifs_tcon *tcon;
struct cifsFileInfo *open_file;
- struct smb_com_read_rsp *pSMBr;
- struct cifs_io_parms io_parms;
- char *read_data;
- unsigned int rsize;
- __u32 pid;
+ struct cifs_readdata *rdata, *tmp;
+ struct list_head rdata_list;
+ pid_t pid;
if (!nr_segs)
return 0;
@@ -2365,14 +2600,10 @@
if (!len)
return 0;
- xid = GetXid();
+ INIT_LIST_HEAD(&rdata_list);
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
-
- /* FIXME: set up handlers for larger reads and/or convert to async */
- rsize = min_t(unsigned int, cifs_sb->rsize, CIFSMaxBufSize);
-
open_file = file->private_data;
- pTcon = tlink_tcon(open_file->tlink);
+ tcon = tlink_tcon(open_file->tlink);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
pid = open_file->pid;
@@ -2382,56 +2613,78 @@
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, "attempting read on write only file instance");
- for (total_read = 0; total_read < len; total_read += bytes_read) {
- cur_len = min_t(const size_t, len - total_read, rsize);
- rc = -EAGAIN;
- read_data = NULL;
+ do {
+ cur_len = min_t(const size_t, len - total_read, cifs_sb->rsize);
+ npages = DIV_ROUND_UP(cur_len, PAGE_SIZE);
- while (rc == -EAGAIN) {
- int buf_type = CIFS_NO_BUFFER;
- if (open_file->invalidHandle) {
- rc = cifs_reopen_file(open_file, true);
- if (rc != 0)
- break;
- }
- io_parms.netfid = open_file->netfid;
- io_parms.pid = pid;
- io_parms.tcon = pTcon;
- io_parms.offset = *poffset;
- io_parms.length = cur_len;
- rc = CIFSSMBRead(xid, &io_parms, &bytes_read,
- &read_data, &buf_type);
- pSMBr = (struct smb_com_read_rsp *)read_data;
- if (read_data) {
- char *data_offset = read_data + 4 +
- le16_to_cpu(pSMBr->DataOffset);
- if (memcpy_toiovecend(iov, data_offset,
- iov_offset, bytes_read))
- rc = -EFAULT;
- if (buf_type == CIFS_SMALL_BUFFER)
- cifs_small_buf_release(read_data);
- else if (buf_type == CIFS_LARGE_BUFFER)
- cifs_buf_release(read_data);
- read_data = NULL;
- iov_offset += bytes_read;
- }
+ /* allocate a readdata struct */
+ rdata = cifs_readdata_alloc(npages,
+ cifs_uncached_readv_complete);
+ if (!rdata) {
+ rc = -ENOMEM;
+ goto error;
}
- if (rc || (bytes_read == 0)) {
- if (total_read) {
- break;
- } else {
- FreeXid(xid);
- return rc;
- }
- } else {
- cifs_stats_bytes_read(pTcon, bytes_read);
- *poffset += bytes_read;
+ rc = cifs_read_allocate_pages(&rdata->pages, npages);
+ if (rc)
+ goto error;
+
+ rdata->cfile = cifsFileInfo_get(open_file);
+ rdata->offset = offset;
+ rdata->bytes = cur_len;
+ rdata->pid = pid;
+ rdata->marshal_iov = cifs_uncached_read_marshal_iov;
+
+ rc = cifs_retry_async_readv(rdata);
+error:
+ if (rc) {
+ kref_put(&rdata->refcount,
+ cifs_uncached_readdata_release);
+ break;
}
+
+ list_add_tail(&rdata->list, &rdata_list);
+ offset += cur_len;
+ len -= cur_len;
+ } while (len > 0);
+
+ /* if at least one read request send succeeded, then reset rc */
+ if (!list_empty(&rdata_list))
+ rc = 0;
+
+ /* the loop below should proceed in the order of increasing offsets */
+restart_loop:
+ list_for_each_entry_safe(rdata, tmp, &rdata_list, list) {
+ if (!rc) {
+ ssize_t copied;
+
+ /* FIXME: freezable sleep too? */
+ rc = wait_for_completion_killable(&rdata->done);
+ if (rc)
+ rc = -EINTR;
+ else if (rdata->result)
+ rc = rdata->result;
+ else {
+ rc = cifs_readdata_to_iov(rdata, iov,
+ nr_segs, *poffset,
+ &copied);
+ total_read += copied;
+ }
+
+ /* resend call if it's a retryable error */
+ if (rc == -EAGAIN) {
+ rc = cifs_retry_async_readv(rdata);
+ goto restart_loop;
+ }
+ }
+ list_del_init(&rdata->list);
+ kref_put(&rdata->refcount, cifs_uncached_readdata_release);
}
- FreeXid(xid);
- return total_read;
+ cifs_stats_bytes_read(tcon, total_read);
+ *poffset += total_read;
+
+ return total_read ? total_read : rc;
}
ssize_t cifs_user_readv(struct kiocb *iocb, const struct iovec *iov,
@@ -2606,6 +2859,100 @@
return rc;
}
+static void
+cifs_readv_complete(struct work_struct *work)
+{
+ struct cifs_readdata *rdata = container_of(work,
+ struct cifs_readdata, work);
+ struct page *page, *tpage;
+
+ list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
+ list_del(&page->lru);
+ lru_cache_add_file(page);
+
+ if (rdata->result == 0) {
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ }
+
+ unlock_page(page);
+
+ if (rdata->result == 0)
+ cifs_readpage_to_fscache(rdata->mapping->host, page);
+
+ page_cache_release(page);
+ }
+ kref_put(&rdata->refcount, cifs_readdata_release);
+}
+
+static int
+cifs_readpages_marshal_iov(struct cifs_readdata *rdata, unsigned int remaining)
+{
+ int len = 0;
+ struct page *page, *tpage;
+ u64 eof;
+ pgoff_t eof_index;
+
+ /* determine the eof that the server (probably) has */
+ eof = CIFS_I(rdata->mapping->host)->server_eof;
+ eof_index = eof ? (eof - 1) >> PAGE_CACHE_SHIFT : 0;
+ cFYI(1, "eof=%llu eof_index=%lu", eof, eof_index);
+
+ rdata->nr_iov = 1;
+ list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {
+ if (remaining >= PAGE_CACHE_SIZE) {
+ /* enough data to fill the page */
+ rdata->iov[rdata->nr_iov].iov_base = kmap(page);
+ rdata->iov[rdata->nr_iov].iov_len = PAGE_CACHE_SIZE;
+ cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
+ rdata->nr_iov, page->index,
+ rdata->iov[rdata->nr_iov].iov_base,
+ rdata->iov[rdata->nr_iov].iov_len);
+ ++rdata->nr_iov;
+ len += PAGE_CACHE_SIZE;
+ remaining -= PAGE_CACHE_SIZE;
+ } else if (remaining > 0) {
+ /* enough for partial page, fill and zero the rest */
+ rdata->iov[rdata->nr_iov].iov_base = kmap(page);
+ rdata->iov[rdata->nr_iov].iov_len = remaining;
+ cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu",
+ rdata->nr_iov, page->index,
+ rdata->iov[rdata->nr_iov].iov_base,
+ rdata->iov[rdata->nr_iov].iov_len);
+ memset(rdata->iov[rdata->nr_iov].iov_base + remaining,
+ '\0', PAGE_CACHE_SIZE - remaining);
+ ++rdata->nr_iov;
+ len += remaining;
+ remaining = 0;
+ } else if (page->index > eof_index) {
+ /*
+ * The VFS will not try to do readahead past the
+ * i_size, but it's possible that we have outstanding
+ * writes with gaps in the middle and the i_size hasn't
+ * caught up yet. Populate those with zeroed out pages
+ * to prevent the VFS from repeatedly attempting to
+ * fill them until the writes are flushed.
+ */
+ zero_user(page, 0, PAGE_CACHE_SIZE);
+ list_del(&page->lru);
+ lru_cache_add_file(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ unlock_page(page);
+ page_cache_release(page);
+ } else {
+ /* no need to hold page hostage */
+ list_del(&page->lru);
+ lru_cache_add_file(page);
+ unlock_page(page);
+ page_cache_release(page);
+ }
+ }
+
+ return len;
+}
+
static int cifs_readpages(struct file *file, struct address_space *mapping,
struct list_head *page_list, unsigned num_pages)
{
@@ -2708,7 +3055,7 @@
nr_pages++;
}
- rdata = cifs_readdata_alloc(nr_pages);
+ rdata = cifs_readdata_alloc(nr_pages, cifs_readv_complete);
if (!rdata) {
/* best to give up if we're out of mem */
list_for_each_entry_safe(page, tpage, &tmplist, lru) {
@@ -2722,24 +3069,16 @@
}
spin_lock(&cifs_file_list_lock);
- cifsFileInfo_get(open_file);
spin_unlock(&cifs_file_list_lock);
- rdata->cfile = open_file;
+ rdata->cfile = cifsFileInfo_get(open_file);
rdata->mapping = mapping;
rdata->offset = offset;
rdata->bytes = bytes;
rdata->pid = pid;
+ rdata->marshal_iov = cifs_readpages_marshal_iov;
list_splice_init(&tmplist, &rdata->pages);
- do {
- if (open_file->invalidHandle) {
- rc = cifs_reopen_file(open_file, true);
- if (rc != 0)
- continue;
- }
- rc = cifs_async_readv(rdata);
- } while (rc == -EAGAIN);
-
+ rc = cifs_retry_async_readv(rdata);
if (rc != 0) {
list_for_each_entry_safe(page, tpage, &rdata->pages,
lru) {
@@ -2748,9 +3087,11 @@
unlock_page(page);
page_cache_release(page);
}
- cifs_readdata_free(rdata);
+ kref_put(&rdata->refcount, cifs_readdata_release);
break;
}
+
+ kref_put(&rdata->refcount, cifs_readdata_release);
}
return rc;
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 4221b5e..6d2667f 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -51,7 +51,15 @@
cifs_sb = CIFS_SB(inode->i_sb);
switch (command) {
+ static bool warned = false;
case CIFS_IOC_CHECKUMOUNT:
+ if (!warned) {
+ warned = true;
+ cERROR(1, "the CIFS_IOC_CHECKMOUNT ioctl will "
+ "be deprecated in 3.7. Please "
+ "migrate away from the use of "
+ "umount.cifs");
+ }
cFYI(1, "User unmount attempted");
if (cifs_sb->mnt_uid == current_uid())
rc = 0;
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index c29d1aa..e2552d2 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -306,8 +306,6 @@
const struct cifs_tcon *treeCon, int word_count
/* length of fixed section (word count) in two byte units */)
{
- struct list_head *temp_item;
- struct cifs_ses *ses;
char *temp = (char *) buffer;
memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */
@@ -337,51 +335,6 @@
/* Uid is not converted */
buffer->Uid = treeCon->ses->Suid;
buffer->Mid = GetNextMid(treeCon->ses->server);
- if (multiuser_mount != 0) {
- /* For the multiuser case, there are few obvious technically */
- /* possible mechanisms to match the local linux user (uid) */
- /* to a valid remote smb user (smb_uid): */
- /* 1) Query Winbind (or other local pam/nss daemon */
- /* for userid/password/logon_domain or credential */
- /* 2) Query Winbind for uid to sid to username mapping */
- /* and see if we have a matching password for existing*/
- /* session for that user perhas getting password by */
- /* adding a new pam_cifs module that stores passwords */
- /* so that the cifs vfs can get at that for all logged*/
- /* on users */
- /* 3) (Which is the mechanism we have chosen) */
- /* Search through sessions to the same server for a */
- /* a match on the uid that was passed in on mount */
- /* with the current processes uid (or euid?) and use */
- /* that smb uid. If no existing smb session for */
- /* that uid found, use the default smb session ie */
- /* the smb session for the volume mounted which is */
- /* the same as would be used if the multiuser mount */
- /* flag were disabled. */
-
- /* BB Add support for establishing new tCon and SMB Session */
- /* with userid/password pairs found on the smb session */
- /* for other target tcp/ip addresses BB */
- if (current_fsuid() != treeCon->ses->linux_uid) {
- cFYI(1, "Multiuser mode and UID "
- "did not match tcon uid");
- spin_lock(&cifs_tcp_ses_lock);
- list_for_each(temp_item, &treeCon->ses->server->smb_ses_list) {
- ses = list_entry(temp_item, struct cifs_ses, smb_ses_list);
- if (ses->linux_uid == current_fsuid()) {
- if (ses->server == treeCon->ses->server) {
- cFYI(1, "found matching uid substitute right smb_uid");
- buffer->Uid = ses->Suid;
- break;
- } else {
- /* BB eventually call cifs_setup_session here */
- cFYI(1, "local UID found but no smb sess with this server exists");
- }
- }
- }
- spin_unlock(&cifs_tcp_ses_lock);
- }
- }
}
if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
buffer->Flags2 |= SMBFLG2_DFS;
@@ -700,22 +653,3 @@
return false;
}
-
-void
-cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add)
-{
- spin_lock(&server->req_lock);
- server->credits += add;
- server->in_flight--;
- spin_unlock(&server->req_lock);
- wake_up(&server->request_q);
-}
-
-void
-cifs_set_credits(struct TCP_Server_Info *server, const int val)
-{
- spin_lock(&server->req_lock);
- server->credits = val;
- server->oplocks = val > 1 ? enable_oplocks : false;
- spin_unlock(&server->req_lock);
-}
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index e2bbc68..0a8224d 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -219,6 +219,7 @@
static int initiate_cifs_search(const int xid, struct file *file)
{
+ __u16 search_flags;
int rc = 0;
char *full_path = NULL;
struct cifsFileInfo *cifsFile;
@@ -270,8 +271,12 @@
cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
}
+ search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
+ if (backup_cred(cifs_sb))
+ search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
+
rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
- &cifsFile->netfid, &cifsFile->srch_inf,
+ &cifsFile->netfid, search_flags, &cifsFile->srch_inf,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
if (rc == 0)
@@ -502,11 +507,13 @@
static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
struct file *file, char **ppCurrentEntry, int *num_to_ret)
{
+ __u16 search_flags;
int rc = 0;
int pos_in_buf = 0;
loff_t first_entry_in_buffer;
loff_t index_to_find = file->f_pos;
struct cifsFileInfo *cifsFile = file->private_data;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
/* check if index in the buffer */
if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
@@ -560,10 +567,14 @@
cifsFile);
}
+ search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
+ if (backup_cred(cifs_sb))
+ search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
+
while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
(rc == 0) && !cifsFile->srch_inf.endOfSearch) {
cFYI(1, "calling findnext2");
- rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
+ rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, search_flags,
&cifsFile->srch_inf);
/* FindFirst/Next set last_entry to NULL on malformed reply */
if (cifsFile->srch_inf.last_entry)
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
new file mode 100644
index 0000000..d9d615f
--- /dev/null
+++ b/fs/cifs/smb1ops.c
@@ -0,0 +1,154 @@
+/*
+ * SMB1 (CIFS) version specific operations
+ *
+ * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 as published
+ * by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifspdu.h"
+
+/*
+ * An NT cancel request header looks just like the original request except:
+ *
+ * The Command is SMB_COM_NT_CANCEL
+ * The WordCount is zeroed out
+ * The ByteCount is zeroed out
+ *
+ * This function mangles an existing request buffer into a
+ * SMB_COM_NT_CANCEL request and then sends it.
+ */
+static int
+send_nt_cancel(struct TCP_Server_Info *server, void *buf,
+ struct mid_q_entry *mid)
+{
+ int rc = 0;
+ struct smb_hdr *in_buf = (struct smb_hdr *)buf;
+
+ /* -4 for RFC1001 length and +2 for BCC field */
+ in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
+ in_buf->Command = SMB_COM_NT_CANCEL;
+ in_buf->WordCount = 0;
+ put_bcc(0, in_buf);
+
+ mutex_lock(&server->srv_mutex);
+ rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
+ if (rc) {
+ mutex_unlock(&server->srv_mutex);
+ return rc;
+ }
+ rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
+ mutex_unlock(&server->srv_mutex);
+
+ cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
+ in_buf->Mid, rc);
+
+ return rc;
+}
+
+static bool
+cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
+{
+ return ob1->netfid == ob2->netfid;
+}
+
+static unsigned int
+cifs_read_data_offset(char *buf)
+{
+ READ_RSP *rsp = (READ_RSP *)buf;
+ return le16_to_cpu(rsp->DataOffset);
+}
+
+static unsigned int
+cifs_read_data_length(char *buf)
+{
+ READ_RSP *rsp = (READ_RSP *)buf;
+ return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
+ le16_to_cpu(rsp->DataLength);
+}
+
+static struct mid_q_entry *
+cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
+{
+ struct smb_hdr *buf = (struct smb_hdr *)buffer;
+ struct mid_q_entry *mid;
+
+ spin_lock(&GlobalMid_Lock);
+ list_for_each_entry(mid, &server->pending_mid_q, qhead) {
+ if (mid->mid == buf->Mid &&
+ mid->mid_state == MID_REQUEST_SUBMITTED &&
+ le16_to_cpu(mid->command) == buf->Command) {
+ spin_unlock(&GlobalMid_Lock);
+ return mid;
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
+ return NULL;
+}
+
+static void
+cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add)
+{
+ spin_lock(&server->req_lock);
+ server->credits += add;
+ server->in_flight--;
+ spin_unlock(&server->req_lock);
+ wake_up(&server->request_q);
+}
+
+static void
+cifs_set_credits(struct TCP_Server_Info *server, const int val)
+{
+ spin_lock(&server->req_lock);
+ server->credits = val;
+ server->oplocks = val > 1 ? enable_oplocks : false;
+ spin_unlock(&server->req_lock);
+}
+
+static int *
+cifs_get_credits_field(struct TCP_Server_Info *server)
+{
+ return &server->credits;
+}
+
+struct smb_version_operations smb1_operations = {
+ .send_cancel = send_nt_cancel,
+ .compare_fids = cifs_compare_fids,
+ .setup_request = cifs_setup_request,
+ .check_receive = cifs_check_receive,
+ .add_credits = cifs_add_credits,
+ .set_credits = cifs_set_credits,
+ .get_credits_field = cifs_get_credits_field,
+ .read_data_offset = cifs_read_data_offset,
+ .read_data_length = cifs_read_data_length,
+ .map_error = map_smb_to_linux_error,
+ .find_mid = cifs_find_mid,
+ .check_message = checkSMB,
+ .dump_detail = cifs_dump_detail,
+ .is_oplock_break = is_valid_oplock_break,
+};
+
+struct smb_version_values smb1_values = {
+ .version_string = SMB1_VERSION_STRING,
+ .large_lock_type = LOCKING_ANDX_LARGE_FILES,
+ .exclusive_lock_type = 0,
+ .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
+ .unlock_lock_type = 0,
+ .header_size = sizeof(struct smb_hdr),
+ .max_header_size = MAX_CIFS_HDR_SIZE,
+ .read_rsp_size = sizeof(READ_RSP),
+};
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
new file mode 100644
index 0000000..f065e89
--- /dev/null
+++ b/fs/cifs/smb2ops.c
@@ -0,0 +1,27 @@
+/*
+ * SMB2 version specific operations
+ *
+ * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 as published
+ * by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "cifsglob.h"
+
+struct smb_version_operations smb21_operations = {
+};
+
+struct smb_version_values smb21_values = {
+ .version_string = SMB21_VERSION_STRING,
+};
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 0961336..1b36ffe 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -304,7 +304,8 @@
static int
wait_for_free_request(struct TCP_Server_Info *server, const int optype)
{
- return wait_for_free_credits(server, optype, get_credits_field(server));
+ return wait_for_free_credits(server, optype,
+ server->ops->get_credits_field(server));
}
static int allocate_mid(struct cifs_ses *ses, struct smb_hdr *in_buf,
@@ -396,7 +397,7 @@
rc = cifs_setup_async_request(server, iov, nvec, &mid);
if (rc) {
mutex_unlock(&server->srv_mutex);
- cifs_add_credits(server, 1);
+ add_credits(server, 1);
wake_up(&server->request_q);
return rc;
}
@@ -418,7 +419,7 @@
return rc;
out_err:
delete_mid(mid);
- cifs_add_credits(server, 1);
+ add_credits(server, 1);
wake_up(&server->request_q);
return rc;
}
@@ -483,41 +484,11 @@
return rc;
}
-/*
- * An NT cancel request header looks just like the original request except:
- *
- * The Command is SMB_COM_NT_CANCEL
- * The WordCount is zeroed out
- * The ByteCount is zeroed out
- *
- * This function mangles an existing request buffer into a
- * SMB_COM_NT_CANCEL request and then sends it.
- */
-static int
-send_nt_cancel(struct TCP_Server_Info *server, struct smb_hdr *in_buf,
- struct mid_q_entry *mid)
+static inline int
+send_cancel(struct TCP_Server_Info *server, void *buf, struct mid_q_entry *mid)
{
- int rc = 0;
-
- /* -4 for RFC1001 length and +2 for BCC field */
- in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2);
- in_buf->Command = SMB_COM_NT_CANCEL;
- in_buf->WordCount = 0;
- put_bcc(0, in_buf);
-
- mutex_lock(&server->srv_mutex);
- rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
- if (rc) {
- mutex_unlock(&server->srv_mutex);
- return rc;
- }
- rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
- mutex_unlock(&server->srv_mutex);
-
- cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
- in_buf->Mid, rc);
-
- return rc;
+ return server->ops->send_cancel ?
+ server->ops->send_cancel(server, buf, mid) : 0;
}
int
@@ -544,7 +515,7 @@
return map_smb_to_linux_error(mid->resp_buf, log_error);
}
-static int
+int
cifs_setup_request(struct cifs_ses *ses, struct kvec *iov,
unsigned int nvec, struct mid_q_entry **ret_mid)
{
@@ -607,12 +578,12 @@
mutex_lock(&ses->server->srv_mutex);
- rc = cifs_setup_request(ses, iov, n_vec, &midQ);
+ rc = ses->server->ops->setup_request(ses, iov, n_vec, &midQ);
if (rc) {
mutex_unlock(&ses->server->srv_mutex);
cifs_small_buf_release(buf);
/* Update # of requests on wire to server */
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -636,13 +607,13 @@
rc = wait_for_response(ses->server, midQ);
if (rc != 0) {
- send_nt_cancel(ses->server, (struct smb_hdr *)buf, midQ);
+ send_cancel(ses->server, buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
midQ->callback = DeleteMidQEntry;
spin_unlock(&GlobalMid_Lock);
cifs_small_buf_release(buf);
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
spin_unlock(&GlobalMid_Lock);
@@ -652,7 +623,7 @@
rc = cifs_sync_mid_result(midQ, ses->server);
if (rc != 0) {
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -670,14 +641,15 @@
else
*pRespBufType = CIFS_SMALL_BUFFER;
- rc = cifs_check_receive(midQ, ses->server, flags & CIFS_LOG_ERROR);
+ rc = ses->server->ops->check_receive(midQ, ses->server,
+ flags & CIFS_LOG_ERROR);
/* mark it so buf will not be freed by delete_mid */
if ((flags & CIFS_NO_RESP) == 0)
midQ->resp_buf = NULL;
out:
delete_mid(midQ);
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -727,7 +699,7 @@
if (rc) {
mutex_unlock(&ses->server->srv_mutex);
/* Update # of requests on wire to server */
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -753,13 +725,13 @@
rc = wait_for_response(ses->server, midQ);
if (rc != 0) {
- send_nt_cancel(ses->server, in_buf, midQ);
+ send_cancel(ses->server, in_buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */
midQ->callback = DeleteMidQEntry;
spin_unlock(&GlobalMid_Lock);
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
spin_unlock(&GlobalMid_Lock);
@@ -767,7 +739,7 @@
rc = cifs_sync_mid_result(midQ, ses->server);
if (rc != 0) {
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -783,7 +755,7 @@
rc = cifs_check_receive(midQ, ses->server, 0);
out:
delete_mid(midQ);
- cifs_add_credits(ses->server, 1);
+ add_credits(ses->server, 1);
return rc;
}
@@ -898,7 +870,7 @@
if (in_buf->Command == SMB_COM_TRANSACTION2) {
/* POSIX lock. We send a NT_CANCEL SMB to cause the
blocking lock to return. */
- rc = send_nt_cancel(ses->server, in_buf, midQ);
+ rc = send_cancel(ses->server, in_buf, midQ);
if (rc) {
delete_mid(midQ);
return rc;
@@ -919,7 +891,7 @@
rc = wait_for_response(ses->server, midQ);
if (rc) {
- send_nt_cancel(ses->server, in_buf, midQ);
+ send_cancel(ses->server, in_buf, midQ);
spin_lock(&GlobalMid_Lock);
if (midQ->mid_state == MID_REQUEST_SUBMITTED) {
/* no longer considered to be "in-flight" */