Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (39 commits)
  ceph: generalize mon requests, add pool op support
  ceph: only queue async writeback on cap revocation if there is dirty data
  ceph: do not ignore osd_idle_ttl mount option
  ceph: constify dentry_operations
  ceph: whitespace cleanup
  ceph: add flock/fcntl lock support
  ceph: define on-wire types, constants for file locking support
  ceph: add CEPH_FEATURE_FLOCK to the supported feature bits
  ceph: support v2 reconnect encoding
  ceph: support v2 client_caps encoding
  ceph: move AES iv definition to shared header
  ceph: fix decoding of pool snap info
  ceph: make ->sync_fs not wait if wait==0
  ceph: warn on missing snap realm
  ceph: print useful error message when crush rule not found
  ceph: use %pU to print uuid (fsid)
  ceph: sync header defs with server code
  ceph: clean up header guards
  ceph: strip misleading/obsolete version, feature info
  ceph: specify supported features in super.h
  ...

fs/ceph/Makefile

@@ -6,7 +6,7 @@ ifneq ($(KERNELRELEASE),)
 
 obj-$(CONFIG_CEPH_FS) += ceph.o
 
-ceph-objs := super.o inode.o dir.o file.o addr.o ioctl.o \
+ceph-objs := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \
 	export.o caps.o snap.o xattr.o \
 	messenger.o msgpool.o buffer.o pagelist.o \
 	mds_client.o mdsmap.o \

fs/ceph/addr.c

@@ -309,7 +309,8 @@ static int ceph_readpages(struct file *file, struct address_space *mapping,
 			zero_user_segment(page, s, PAGE_CACHE_SIZE);
 		}
 
-		if (add_to_page_cache_lru(page, mapping, page->index, GFP_NOFS)) {
+		if (add_to_page_cache_lru(page, mapping, page->index,
+					  GFP_NOFS)) {
 			page_cache_release(page);
 			dout("readpages %p add_to_page_cache failed %p\n",
 			     inode, page);
@@ -552,7 +553,7 @@ static void writepages_finish(struct ceph_osd_request *req,
 		 * page truncation thread, possibly losing some data that
 		 * raced its way in
 		 */
-		if ((issued & CEPH_CAP_FILE_CACHE) == 0)
+		if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0)
 			generic_error_remove_page(inode->i_mapping, page);
 
 		unlock_page(page);
@@ -797,9 +798,12 @@ static int ceph_writepages_start(struct address_space *mapping,
 			dout("%p will write page %p idx %lu\n",
 			     inode, page, page->index);
 
-			writeback_stat = atomic_long_inc_return(&client->writeback_count);
-			if (writeback_stat > CONGESTION_ON_THRESH(client->mount_args->congestion_kb)) {
-				set_bdi_congested(&client->backing_dev_info, BLK_RW_ASYNC);
+			writeback_stat =
+			       atomic_long_inc_return(&client->writeback_count);
+			if (writeback_stat > CONGESTION_ON_THRESH(
+				    client->mount_args->congestion_kb)) {
+				set_bdi_congested(&client->backing_dev_info,
+						  BLK_RW_ASYNC);
 			}
 
 			set_page_writeback(page);

fs/ceph/armor.c

 
 #include <linux/errno.h>
 
+int ceph_armor(char *dst, const char *src, const char *end);
+int ceph_unarmor(char *dst, const char *src, const char *end);
+
 /*
  * base64 encode/decode.
  */
 
-const char *pem_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const char *pem_key =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
 static int encode_bits(int c)
 {

fs/ceph/auth.c

@@ -20,7 +20,7 @@ static u32 supported_protocols[] = {
 	CEPH_AUTH_CEPHX
 };
 
-int ceph_auth_init_protocol(struct ceph_auth_client *ac, int protocol)
+static int ceph_auth_init_protocol(struct ceph_auth_client *ac, int protocol)
 {
 	switch (protocol) {
 	case CEPH_AUTH_NONE:
@@ -133,7 +133,7 @@ int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
 	return -ERANGE;
 }
 
-int ceph_build_auth_request(struct ceph_auth_client *ac,
+static int ceph_build_auth_request(struct ceph_auth_client *ac,
 				   void *msg_buf, size_t msg_len)
 {
 	struct ceph_mon_request_header *monhdr = msg_buf;

fs/ceph/auth_x.c

@@ -87,8 +87,8 @@ static int ceph_x_decrypt(struct ceph_crypto_key *secret,
 /*
  * get existing (or insert new) ticket handler
  */
-struct ceph_x_ticket_handler *get_ticket_handler(struct ceph_auth_client *ac,
-						 int service)
+static struct ceph_x_ticket_handler *
+get_ticket_handler(struct ceph_auth_client *ac, int service)
 {
 	struct ceph_x_ticket_handler *th;
 	struct ceph_x_info *xi = ac->private;
@@ -429,7 +429,7 @@ static int ceph_x_build_request(struct ceph_auth_client *ac,
 		auth->struct_v = 1;
 		auth->key = 0;
 		for (u = (u64 *)tmp_enc; u + 1 <= (u64 *)(tmp_enc + ret); u++)
-			auth->key ^= *u;
+			auth->key ^= *(__le64 *)u;
 		dout(" server_challenge %llx client_challenge %llx key %llx\n",
 		     xi->server_challenge, le64_to_cpu(auth->client_challenge),
 		     le64_to_cpu(auth->key));

fs/ceph/buffer.c

@@ -47,22 +47,6 @@ void ceph_buffer_release(struct kref *kref)
 	kfree(b);
 }
 
-int ceph_buffer_alloc(struct ceph_buffer *b, int len, gfp_t gfp)
-{
-	b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
-	if (b->vec.iov_base) {
-		b->is_vmalloc = false;
-	} else {
-		b->vec.iov_base = __vmalloc(len, gfp, PAGE_KERNEL);
-		b->is_vmalloc = true;
-	}
-	if (!b->vec.iov_base)
-		return -ENOMEM;
-	b->alloc_len = len;
-	b->vec.iov_len = len;
-	return 0;
-}
-
 int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
 {
 	size_t len;

fs/ceph/ceph_frag.h

-#ifndef _FS_CEPH_FRAG_H
-#define _FS_CEPH_FRAG_H
+#ifndef FS_CEPH_FRAG_H
+#define FS_CEPH_FRAG_H
 
 /*
  * "Frags" are a way to describe a subset of a 32-bit number space,

fs/ceph/ceph_fs.c

@@ -29,46 +29,44 @@ int ceph_file_layout_is_valid(const struct ceph_file_layout *layout)
 
 int ceph_flags_to_mode(int flags)
 {
+	int mode;
+
 #ifdef O_DIRECTORY  /* fixme */
 	if ((flags & O_DIRECTORY) == O_DIRECTORY)
 		return CEPH_FILE_MODE_PIN;
 #endif
+	if ((flags & O_APPEND) == O_APPEND)
+		flags |= O_WRONLY;
+
+	if ((flags & O_ACCMODE) == O_RDWR)
+		mode = CEPH_FILE_MODE_RDWR;
+	else if ((flags & O_ACCMODE) == O_WRONLY)
+		mode = CEPH_FILE_MODE_WR;
+	else
+		mode = CEPH_FILE_MODE_RD;
+
 #ifdef O_LAZY
 	if (flags & O_LAZY)
-		return CEPH_FILE_MODE_LAZY;
+		mode |= CEPH_FILE_MODE_LAZY;
 #endif
-	if ((flags & O_APPEND) == O_APPEND)
-		flags |= O_WRONLY;
 
-	flags &= O_ACCMODE;
-	if ((flags & O_RDWR) == O_RDWR)
-		return CEPH_FILE_MODE_RDWR;
-	if ((flags & O_WRONLY) == O_WRONLY)
-		return CEPH_FILE_MODE_WR;
-	return CEPH_FILE_MODE_RD;
+	return mode;
 }
 
 int ceph_caps_for_mode(int mode)
 {
-	switch (mode) {
-	case CEPH_FILE_MODE_PIN:
-		return CEPH_CAP_PIN;
-	case CEPH_FILE_MODE_RD:
-		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
+	int caps = CEPH_CAP_PIN;
+
+	if (mode & CEPH_FILE_MODE_RD)
+		caps |= CEPH_CAP_FILE_SHARED |
 			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE;
-	case CEPH_FILE_MODE_RDWR:
-		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
-			CEPH_CAP_FILE_EXCL |
-			CEPH_CAP_FILE_RD | CEPH_CAP_FILE_CACHE |
-			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
-			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
-			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
-	case CEPH_FILE_MODE_WR:
-		return CEPH_CAP_PIN | CEPH_CAP_FILE_SHARED |
-			CEPH_CAP_FILE_EXCL |
+	if (mode & CEPH_FILE_MODE_WR)
+		caps |= CEPH_CAP_FILE_EXCL |
 			CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER |
 			CEPH_CAP_AUTH_SHARED | CEPH_CAP_AUTH_EXCL |
 			CEPH_CAP_XATTR_SHARED | CEPH_CAP_XATTR_EXCL;
-	}
-	return 0;
+	if (mode & CEPH_FILE_MODE_LAZY)
+		caps |= CEPH_CAP_FILE_LAZYIO;
+
+	return caps;
 }

fs/ceph/ceph_fs.h

@@ -9,26 +9,12 @@
  * LGPL2
  */
 
-#ifndef _FS_CEPH_CEPH_FS_H
-#define _FS_CEPH_CEPH_FS_H
+#ifndef CEPH_FS_H
+#define CEPH_FS_H
 
 #include "msgr.h"
 #include "rados.h"
 
-/*
- * Ceph release version
- */
-#define CEPH_VERSION_MAJOR 0
-#define CEPH_VERSION_MINOR 20
-#define CEPH_VERSION_PATCH 0
-
-#define _CEPH_STRINGIFY(x) #x
-#define CEPH_STRINGIFY(x) _CEPH_STRINGIFY(x)
-#define CEPH_MAKE_VERSION(x, y, z) CEPH_STRINGIFY(x) "." CEPH_STRINGIFY(y) \
-	"." CEPH_STRINGIFY(z)
-#define CEPH_VERSION CEPH_MAKE_VERSION(CEPH_VERSION_MAJOR, \
-				       CEPH_VERSION_MINOR, CEPH_VERSION_PATCH)
-
 /*
  * subprotocol versions.  when specific messages types or high-level
  * protocols change, bump the affected components.  we keep rev
@@ -53,18 +39,10 @@
 /*
  * feature bits
  */
-#define CEPH_FEATURE_UID        1
-#define CEPH_FEATURE_NOSRCADDR  2
-#define CEPH_FEATURE_FLOCK      4
-
-#define CEPH_FEATURE_SUPPORTED_MON  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR
-#define CEPH_FEATURE_REQUIRED_MON   CEPH_FEATURE_UID
-#define CEPH_FEATURE_SUPPORTED_MDS  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR|CEPH_FEATURE_FLOCK
-#define CEPH_FEATURE_REQUIRED_MDS   CEPH_FEATURE_UID
-#define CEPH_FEATURE_SUPPORTED_OSD  CEPH_FEATURE_UID|CEPH_FEATURE_NOSRCADDR
-#define CEPH_FEATURE_REQUIRED_OSD   CEPH_FEATURE_UID
-#define CEPH_FEATURE_SUPPORTED_CLIENT CEPH_FEATURE_NOSRCADDR
-#define CEPH_FEATURE_REQUIRED_CLIENT CEPH_FEATURE_NOSRCADDR
+#define CEPH_FEATURE_UID            (1<<0)
+#define CEPH_FEATURE_NOSRCADDR      (1<<1)
+#define CEPH_FEATURE_MONCLOCKCHECK  (1<<2)
+#define CEPH_FEATURE_FLOCK          (1<<3)
 
 
 /*
@@ -96,6 +74,8 @@ int ceph_file_layout_is_valid(const struct ceph_file_layout *layout);
 #define CEPH_CRYPTO_NONE 0x0
 #define CEPH_CRYPTO_AES  0x1
 
+#define CEPH_AES_IV "cephsageyudagreg"
+
 /* security/authentication protocols */
 #define CEPH_AUTH_UNKNOWN	0x0
 #define CEPH_AUTH_NONE	 	0x1
@@ -275,6 +255,7 @@ extern const char *ceph_mds_state_name(int s);
 #define CEPH_LOCK_IDFT        512   /* dir frag tree */
 #define CEPH_LOCK_INEST       1024  /* mds internal */
 #define CEPH_LOCK_IXATTR      2048
+#define CEPH_LOCK_IFLOCK      4096  /* advisory file locks */
 #define CEPH_LOCK_INO         8192  /* immutable inode bits; not a lock */
 
 /* client_session ops */
@@ -316,6 +297,8 @@ enum {
 	CEPH_MDS_OP_RMXATTR    = 0x01106,
 	CEPH_MDS_OP_SETLAYOUT  = 0x01107,
 	CEPH_MDS_OP_SETATTR    = 0x01108,
+	CEPH_MDS_OP_SETFILELOCK= 0x01109,
+	CEPH_MDS_OP_GETFILELOCK= 0x00110,
 
 	CEPH_MDS_OP_MKNOD      = 0x01201,
 	CEPH_MDS_OP_LINK       = 0x01202,
@@ -386,6 +369,15 @@ union ceph_mds_request_args {
 	struct {
 		struct ceph_file_layout layout;
 	} __attribute__ ((packed)) setlayout;
+	struct {
+		__u8 rule; /* currently fcntl or flock */
+		__u8 type; /* shared, exclusive, remove*/
+		__le64 pid; /* process id requesting the lock */
+		__le64 pid_namespace;
+		__le64 start; /* initial location to lock */
+		__le64 length; /* num bytes to lock from start */
+		__u8 wait; /* will caller wait for lock to become available? */
+	} __attribute__ ((packed)) filelock_change;
 } __attribute__ ((packed));
 
 #define CEPH_MDS_FLAG_REPLAY        1  /* this is a replayed op */
@@ -480,6 +472,23 @@ struct ceph_mds_reply_dirfrag {
 	__le32 dist[];
 } __attribute__ ((packed));
 
+#define CEPH_LOCK_FCNTL    1
+#define CEPH_LOCK_FLOCK    2
+
+#define CEPH_LOCK_SHARED   1
+#define CEPH_LOCK_EXCL     2
+#define CEPH_LOCK_UNLOCK   4
+
+struct ceph_filelock {
+	__le64 start;/* file offset to start lock at */
+	__le64 length; /* num bytes to lock; 0 for all following start */
+	__le64 client; /* which client holds the lock */
+	__le64 pid; /* process id holding the lock on the client */
+	__le64 pid_namespace;
+	__u8 type; /* shared lock, exclusive lock, or unlock */
+} __attribute__ ((packed));
+
+
 /* file access modes */
 #define CEPH_FILE_MODE_PIN        0
 #define CEPH_FILE_MODE_RD         1
@@ -508,9 +517,10 @@ int ceph_flags_to_mode(int flags);
 #define CEPH_CAP_SAUTH      2
 #define CEPH_CAP_SLINK      4
 #define CEPH_CAP_SXATTR     6
-#define CEPH_CAP_SFILE      8   /* goes at the end (uses >2 cap bits) */
+#define CEPH_CAP_SFILE      8
+#define CEPH_CAP_SFLOCK    20 
 
-#define CEPH_CAP_BITS       16
+#define CEPH_CAP_BITS       22
 
 /* composed values */
 #define CEPH_CAP_AUTH_SHARED  (CEPH_CAP_GSHARED  << CEPH_CAP_SAUTH)
@@ -528,6 +538,9 @@ int ceph_flags_to_mode(int flags);
 #define CEPH_CAP_FILE_BUFFER   (CEPH_CAP_GBUFFER   << CEPH_CAP_SFILE)
 #define CEPH_CAP_FILE_WREXTEND (CEPH_CAP_GWREXTEND << CEPH_CAP_SFILE)
 #define CEPH_CAP_FILE_LAZYIO   (CEPH_CAP_GLAZYIO   << CEPH_CAP_SFILE)
+#define CEPH_CAP_FLOCK_SHARED  (CEPH_CAP_GSHARED   << CEPH_CAP_SFLOCK)
+#define CEPH_CAP_FLOCK_EXCL    (CEPH_CAP_GEXCL     << CEPH_CAP_SFLOCK)
+
 
 /* cap masks (for getattr) */
 #define CEPH_STAT_CAP_INODE    CEPH_CAP_PIN
@@ -563,7 +576,8 @@ int ceph_flags_to_mode(int flags);
 			      CEPH_CAP_FILE_EXCL)
 #define CEPH_CAP_ANY_WR   (CEPH_CAP_ANY_EXCL | CEPH_CAP_ANY_FILE_WR)
 #define CEPH_CAP_ANY      (CEPH_CAP_ANY_RD | CEPH_CAP_ANY_EXCL | \
-			   CEPH_CAP_ANY_FILE_WR | CEPH_CAP_PIN)
+			   CEPH_CAP_ANY_FILE_WR | CEPH_CAP_FILE_LAZYIO | \
+			   CEPH_CAP_PIN)
 
 #define CEPH_CAP_LOCKS (CEPH_LOCK_IFILE | CEPH_LOCK_IAUTH | CEPH_LOCK_ILINK | \
 			CEPH_LOCK_IXATTR)
@@ -650,6 +664,16 @@ struct ceph_mds_lease {
 
 /* client reconnect */
 struct ceph_mds_cap_reconnect {
+	__le64 cap_id;
+	__le32 wanted;
+	__le32 issued;
+	__le64 snaprealm;
+	__le64 pathbase;        /* base ino for our path to this ino */
+	__le32 flock_len;       /* size of flock state blob, if any */
+} __attribute__ ((packed));
+/* followed by flock blob */
+
+struct ceph_mds_cap_reconnect_v1 {
 	__le64 cap_id;
 	__le32 wanted;
 	__le32 issued;
@@ -658,7 +682,6 @@ struct ceph_mds_cap_reconnect {
 	__le64 snaprealm;
 	__le64 pathbase;        /* base ino for our path to this ino */
 } __attribute__ ((packed));
-/* followed by encoded string */
 
 struct ceph_mds_snaprealm_reconnect {
 	__le64 ino;     /* snap realm base */

fs/ceph/ceph_hash.h

-#ifndef _FS_CEPH_HASH_H
-#define _FS_CEPH_HASH_H
+#ifndef FS_CEPH_HASH_H
+#define FS_CEPH_HASH_H
 
 #define CEPH_STR_HASH_LINUX      0x1  /* linux dcache hash */
 #define CEPH_STR_HASH_RJENKINS   0x2  /* robert jenkins' */

fs/ceph/ceph_strings.c

@@ -28,6 +28,7 @@ const char *ceph_osd_op_name(int op)
 	case CEPH_OSD_OP_TRUNCATE: return "truncate";
 	case CEPH_OSD_OP_ZERO: return "zero";
 	case CEPH_OSD_OP_WRITEFULL: return "writefull";
+	case CEPH_OSD_OP_ROLLBACK: return "rollback";
 
 	case CEPH_OSD_OP_APPEND: return "append";
 	case CEPH_OSD_OP_STARTSYNC: return "startsync";
@@ -129,6 +130,8 @@ const char *ceph_mds_op_name(int op)
 	case CEPH_MDS_OP_LSSNAP: return "lssnap";
 	case CEPH_MDS_OP_MKSNAP: return "mksnap";
 	case CEPH_MDS_OP_RMSNAP: return "rmsnap";
+	case CEPH_MDS_OP_SETFILELOCK: return "setfilelock";
+	case CEPH_MDS_OP_GETFILELOCK: return "getfilelock";
 	}
 	return "???";
 }

fs/ceph/crush/crush.h

-#ifndef _CRUSH_CRUSH_H
-#define _CRUSH_CRUSH_H
+#ifndef CEPH_CRUSH_CRUSH_H
+#define CEPH_CRUSH_CRUSH_H
 
 #include <linux/types.h>
 

fs/ceph/crush/hash.h

-#ifndef _CRUSH_HASH_H
-#define _CRUSH_HASH_H
+#ifndef CEPH_CRUSH_HASH_H
+#define CEPH_CRUSH_HASH_H
 
 #define CRUSH_HASH_RJENKINS1   0
 

fs/ceph/crush/mapper.h

-#ifndef _CRUSH_MAPPER_H
-#define _CRUSH_MAPPER_H
+#ifndef CEPH_CRUSH_MAPPER_H
+#define CEPH_CRUSH_MAPPER_H
 
 /*
  * CRUSH functions for find rules and then mapping an input to an

fs/ceph/crypto.c

@@ -75,9 +75,10 @@ static struct crypto_blkcipher *ceph_crypto_alloc_cipher(void)
 	return crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC);
 }
 
-const u8 *aes_iv = "cephsageyudagreg";
+static const u8 *aes_iv = (u8 *)CEPH_AES_IV;
 
-int ceph_aes_encrypt(const void *key, int key_len, void *dst, size_t *dst_len,
+static int ceph_aes_encrypt(const void *key, int key_len,
+			    void *dst, size_t *dst_len,
 			    const void *src, size_t src_len)
 {
 	struct scatterlist sg_in[2], sg_out[1];
@@ -126,7 +127,8 @@ int ceph_aes_encrypt(const void *key, int key_len, void *dst, size_t *dst_len,
 	return 0;
 }
 
-int ceph_aes_encrypt2(const void *key, int key_len, void *dst, size_t *dst_len,
+static int ceph_aes_encrypt2(const void *key, int key_len, void *dst,
+			     size_t *dst_len,
 			     const void *src1, size_t src1_len,
 			     const void *src2, size_t src2_len)
 {
@@ -179,7 +181,8 @@ int ceph_aes_encrypt2(const void *key, int key_len, void *dst, size_t *dst_len,
 	return 0;
 }
 
-int ceph_aes_decrypt(const void *key, int key_len, void *dst, size_t *dst_len,
+static int ceph_aes_decrypt(const void *key, int key_len,
+			    void *dst, size_t *dst_len,
 			    const void *src, size_t src_len)
 {
 	struct scatterlist sg_in[1], sg_out[2];
@@ -238,7 +241,7 @@ int ceph_aes_decrypt(const void *key, int key_len, void *dst, size_t *dst_len,
 	return 0;
 }
 
-int ceph_aes_decrypt2(const void *key, int key_len,
+static int ceph_aes_decrypt2(const void *key, int key_len,
 			     void *dst1, size_t *dst1_len,
 			     void *dst2, size_t *dst2_len,
 			     const void *src, size_t src_len)

fs/ceph/crypto.h

@@ -42,7 +42,7 @@ extern int ceph_encrypt2(struct ceph_crypto_key *secret,
 			 const void *src2, size_t src2_len);
 
 /* armor.c */
-extern int ceph_armor(char *dst, const void *src, const void *end);
-extern int ceph_unarmor(void *dst, const char *src, const char *end);
+extern int ceph_armor(char *dst, const char *src, const char *end);
+extern int ceph_unarmor(char *dst, const char *src, const char *end);
 
 #endif

fs/ceph/debugfs.c

@@ -361,8 +361,8 @@ int ceph_debugfs_client_init(struct ceph_client *client)
 	int ret = 0;
 	char name[80];
 
-	snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
-		 PR_FSID(&client->fsid), client->monc.auth->global_id);
+	snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
+		 client->monc.auth->global_id);
 
 	client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 	if (!client->debugfs_dir)
@@ -432,7 +432,8 @@ int ceph_debugfs_client_init(struct ceph_client *client)
 	if (!client->debugfs_caps)
 		goto out;
 
-	client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
+	client->debugfs_congestion_kb =
+		debugfs_create_file("writeback_congestion_kb",
 				    0600,
 				    client->debugfs_dir,
 				    client,
@@ -466,7 +467,7 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client)
 	debugfs_remove(client->debugfs_dir);
 }
 
-#else  // CONFIG_DEBUG_FS
+#else  /* CONFIG_DEBUG_FS */
 
 int __init ceph_debugfs_init(void)
 {
@@ -486,4 +487,4 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client)
 {
 }
 
-#endif  // CONFIG_DEBUG_FS
+#endif  /* CONFIG_DEBUG_FS */

fs/ceph/decode.h

@@ -99,11 +99,13 @@ static inline void ceph_encode_timespec(struct ceph_timespec *tv,
  */
 static inline void ceph_encode_addr(struct ceph_entity_addr *a)
 {
-	a->in_addr.ss_family = htons(a->in_addr.ss_family);
+	__be16 ss_family = htons(a->in_addr.ss_family);
+	a->in_addr.ss_family = *(__u16 *)&ss_family;
 }
 static inline void ceph_decode_addr(struct ceph_entity_addr *a)
 {
-	a->in_addr.ss_family = ntohs(a->in_addr.ss_family);
+	__be16 ss_family = *(__be16 *)&a->in_addr.ss_family;
+	a->in_addr.ss_family = ntohs(ss_family);
 	WARN_ON(a->in_addr.ss_family == 512);
 }
 

fs/ceph/dir.c

@@ -27,7 +27,7 @@
 
 const struct inode_operations ceph_dir_iops;
 const struct file_operations ceph_dir_fops;
-struct dentry_operations ceph_dentry_ops;
+const struct dentry_operations ceph_dentry_ops;
 
 /*
  * Initialize ceph dentry state.
@@ -94,6 +94,8 @@ static unsigned fpos_off(loff_t p)
  */
 static int __dcache_readdir(struct file *filp,
 			    void *dirent, filldir_t filldir)
+		__releases(inode->i_lock)
+		__acquires(inode->i_lock)
 {
 	struct inode *inode = filp->f_dentry->d_inode;
 	struct ceph_file_info *fi = filp->private_data;
@@ -1239,16 +1241,16 @@ const struct inode_operations ceph_dir_iops = {
 	.create = ceph_create,
 };
 
-struct dentry_operations ceph_dentry_ops = {
+const struct dentry_operations ceph_dentry_ops = {
 	.d_revalidate = ceph_d_revalidate,
 	.d_release = ceph_dentry_release,
 };
 
-struct dentry_operations ceph_snapdir_dentry_ops = {
+const struct dentry_operations ceph_snapdir_dentry_ops = {
 	.d_revalidate = ceph_snapdir_d_revalidate,
 	.d_release = ceph_dentry_release,
 };
 
-struct dentry_operations ceph_snap_dentry_ops = {
+const struct dentry_operations ceph_snap_dentry_ops = {
 	.d_release = ceph_dentry_release,
 };

fs/ceph/file.c

@@ -317,7 +317,7 @@ void ceph_release_page_vector(struct page **pages, int num_pages)
 /*
  * allocate a vector new pages
  */
-struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags)
+static struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags)
 {
 	struct page **pages;
 	int i;
@@ -740,28 +740,32 @@ static ssize_t ceph_aio_read(struct kiocb *iocb, const struct iovec *iov,
 			     unsigned long nr_segs, loff_t pos)
 {
 	struct file *filp = iocb->ki_filp;
+	struct ceph_file_info *fi = filp->private_data;
 	loff_t *ppos = &iocb->ki_pos;
 	size_t len = iov->iov_len;
 	struct inode *inode = filp->f_dentry->d_inode;
 	struct ceph_inode_info *ci = ceph_inode(inode);
-	void *base = iov->iov_base;
+	void __user *base = iov->iov_base;
 	ssize_t ret;
-	int got = 0;
+	int want, got = 0;
 	int checkeof = 0, read = 0;
 
 	dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n",
 	     inode, ceph_vinop(inode), pos, (unsigned)len, inode);
 again:
 	__ceph_do_pending_vmtruncate(inode);
-	ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, CEPH_CAP_FILE_CACHE,
-			    &got, -1);
+	if (fi->fmode & CEPH_FILE_MODE_LAZY)
+		want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
+	else
+		want = CEPH_CAP_FILE_CACHE;
+	ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, &got, -1);
 	if (ret < 0)
 		goto out;
 	dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n",
 	     inode, ceph_vinop(inode), pos, (unsigned)len,
 	     ceph_cap_string(got));
 
-	if ((got & CEPH_CAP_FILE_CACHE) == 0 ||
+	if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 ||
 	    (iocb->ki_filp->f_flags & O_DIRECT) ||
 	    (inode->i_sb->s_flags & MS_SYNCHRONOUS))
 		/* hmm, this isn't really async... */
@@ -807,11 +811,12 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
 		       unsigned long nr_segs, loff_t pos)
 {
 	struct file *file = iocb->ki_filp;
+	struct ceph_file_info *fi = file->private_data;
 	struct inode *inode = file->f_dentry->d_inode;
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct ceph_osd_client *osdc = &ceph_sb_to_client(inode->i_sb)->osdc;
 	loff_t endoff = pos + iov->iov_len;
-	int got = 0;
+	int want, got = 0;
 	int ret, err;
 
 	if (ceph_snap(inode) != CEPH_NOSNAP)
@@ -824,8 +829,11 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	dout("aio_write %p %llx.%llx %llu~%u getting caps. i_size %llu\n",
 	     inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
 	     inode->i_size);
-	ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER,
-			    &got, endoff);
+	if (fi->fmode & CEPH_FILE_MODE_LAZY)
+		want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
+	else
+		want = CEPH_CAP_FILE_BUFFER;
+	ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, &got, endoff);
 	if (ret < 0)
 		goto out;
 
@@ -833,7 +841,7 @@ static ssize_t ceph_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	     inode, ceph_vinop(inode), pos, (unsigned)iov->iov_len,
 	     ceph_cap_string(got));
 
-	if ((got & CEPH_CAP_FILE_BUFFER) == 0 ||
+	if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
 	    (iocb->ki_filp->f_flags & O_DIRECT) ||
 	    (inode->i_sb->s_flags & MS_SYNCHRONOUS)) {
 		ret = ceph_sync_write(file, iov->iov_base, iov->iov_len,
@@ -930,6 +938,8 @@ const struct file_operations ceph_file_fops = {
 	.aio_write = ceph_aio_write,
 	.mmap = ceph_mmap,
 	.fsync = ceph_fsync,
+	.lock = ceph_lock,
+	.flock = ceph_flock,
 	.splice_read = generic_file_splice_read,
 	.splice_write = generic_file_splice_write,
 	.unlocked_ioctl = ceph_ioctl,

fs/ceph/inode.c

@@ -443,7 +443,8 @@ int ceph_fill_file_size(struct inode *inode, int issued,
 			 */
 			if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
 				       CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
-				      CEPH_CAP_FILE_EXCL)) ||
+				       CEPH_CAP_FILE_EXCL|
+				       CEPH_CAP_FILE_LAZYIO)) ||
 			    mapping_mapped(inode->i_mapping) ||
 			    __ceph_caps_file_wanted(ci)) {
 				ci->i_truncate_pending++;

fs/ceph/ioctl.c

@@ -143,6 +143,27 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
 	return 0;
 }
 
+static long ceph_ioctl_lazyio(struct file *file)
+{
+	struct ceph_file_info *fi = file->private_data;
+	struct inode *inode = file->f_dentry->d_inode;
+	struct ceph_inode_info *ci = ceph_inode(inode);
+
+	if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
+		spin_lock(&inode->i_lock);
+		ci->i_nr_by_mode[fi->fmode]--;
+		fi->fmode |= CEPH_FILE_MODE_LAZY;
+		ci->i_nr_by_mode[fi->fmode]++;
+		spin_unlock(&inode->i_lock);
+		dout("ioctl_layzio: file %p marked lazy\n", file);
+
+		ceph_check_caps(ci, 0, NULL);
+	} else {
+		dout("ioctl_layzio: file %p already lazy\n", file);
+	}
+	return 0;
+}
+
 long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
@@ -155,6 +176,9 @@ long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 	case CEPH_IOC_GET_DATALOC:
 		return ceph_ioctl_get_dataloc(file, (void __user *)arg);
+
+	case CEPH_IOC_LAZYIO:
+		return ceph_ioctl_lazyio(file);
 	}
 	return -ENOTTY;
 }

fs/ceph/ioctl.h

@@ -37,4 +37,6 @@ struct ceph_ioctl_dataloc {
 #define CEPH_IOC_GET_DATALOC _IOWR(CEPH_IOCTL_MAGIC, 3,	\
 				   struct ceph_ioctl_dataloc)
 
+#define CEPH_IOC_LAZYIO _IO(CEPH_IOCTL_MAGIC, 4)
+
 #endif

fs/ceph/locks.c

+#include "ceph_debug.h"
+
+#include <linux/file.h>
+#include <linux/namei.h>
+
+#include "super.h"
+#include "mds_client.h"
+#include "pagelist.h"
+
+/**
+ * Implement fcntl and flock locking functions.
+ */
+static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file,
+			     u64 pid, u64 pid_ns,
+			     int cmd, u64 start, u64 length, u8 wait)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	struct ceph_mds_client *mdsc =
+		&ceph_sb_to_client(inode->i_sb)->mdsc;
+	struct ceph_mds_request *req;
+	int err;
+
+	req = ceph_mdsc_create_request(mdsc, operation, USE_AUTH_MDS);
+	if (IS_ERR(req))
+		return PTR_ERR(req);
+	req->r_inode = igrab(inode);
+
+	dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, "
+	     "length: %llu, wait: %d, type`: %d", (int)lock_type,
+	     (int)operation, pid, start, length, wait, cmd);
+
+	req->r_args.filelock_change.rule = lock_type;
+	req->r_args.filelock_change.type = cmd;
+	req->r_args.filelock_change.pid = cpu_to_le64(pid);
+	/* This should be adjusted, but I'm not sure if
+	   namespaces actually get id numbers*/
+	req->r_args.filelock_change.pid_namespace =
+		cpu_to_le64((u64)pid_ns);
+	req->r_args.filelock_change.start = cpu_to_le64(start);
+	req->r_args.filelock_change.length = cpu_to_le64(length);
+	req->r_args.filelock_change.wait = wait;
+
+	err = ceph_mdsc_do_request(mdsc, inode, req);
+	ceph_mdsc_put_request(req);
+	dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, "
+	     "length: %llu, wait: %d, type`: %d err code %d", (int)lock_type,
+	     (int)operation, pid, start, length, wait, cmd, err);
+	return err;
+}
+
+/**
+ * Attempt to set an fcntl lock.
+ * For now, this just goes away to the server. Later it may be more awesome.
+ */
+int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
+{
+	u64 length;
+	u8 lock_cmd;
+	int err;
+	u8 wait = 0;
+	u16 op = CEPH_MDS_OP_SETFILELOCK;
+
+	fl->fl_nspid = get_pid(task_tgid(current));
+	dout("ceph_lock, fl_pid:%d", fl->fl_pid);
+
+	/* set wait bit as appropriate, then make command as Ceph expects it*/
+	if (F_SETLKW == cmd)
+		wait = 1;
+	if (F_GETLK == cmd)
+		op = CEPH_MDS_OP_GETFILELOCK;
+
+	if (F_RDLCK == fl->fl_type)
+		lock_cmd = CEPH_LOCK_SHARED;
+	else if (F_WRLCK == fl->fl_type)
+		lock_cmd = CEPH_LOCK_EXCL;
+	else
+		lock_cmd = CEPH_LOCK_UNLOCK;
+
+	if (LLONG_MAX == fl->fl_end)
+		length = 0;
+	else
+		length = fl->fl_end - fl->fl_start + 1;
+
+	err = ceph_lock_message(CEPH_LOCK_FCNTL, op, file,
+				(u64)fl->fl_pid, (u64)fl->fl_nspid,
+				lock_cmd, fl->fl_start,
+				length, wait);
+	if (!err) {
+		dout("mds locked, locking locally");
+		err = posix_lock_file(file, fl, NULL);
+		if (err && (CEPH_MDS_OP_SETFILELOCK == op)) {
+			/* undo! This should only happen if the kernel detects
+			 * local deadlock. */
+			ceph_lock_message(CEPH_LOCK_FCNTL, op, file,
+					  (u64)fl->fl_pid, (u64)fl->fl_nspid,
+					  CEPH_LOCK_UNLOCK, fl->fl_start,
+					  length, 0);
+			dout("got %d on posix_lock_file, undid lock", err);
+		}
+	} else {
+		dout("mds returned error code %d", err);
+	}
+	return err;
+}
+
+int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
+{
+	u64 length;
+	u8 lock_cmd;
+	int err;
+	u8 wait = 1;
+
+	fl->fl_nspid = get_pid(task_tgid(current));
+	dout("ceph_flock, fl_pid:%d", fl->fl_pid);
+
+	/* set wait bit, then clear it out of cmd*/
+	if (cmd & LOCK_NB)
+		wait = 0;
+	cmd = cmd & (LOCK_SH | LOCK_EX | LOCK_UN);
+	/* set command sequence that Ceph wants to see:
+	   shared lock, exclusive lock, or unlock */
+	if (LOCK_SH == cmd)
+		lock_cmd = CEPH_LOCK_SHARED;
+	else if (LOCK_EX == cmd)
+		lock_cmd = CEPH_LOCK_EXCL;
+	else
+		lock_cmd = CEPH_LOCK_UNLOCK;
+	/* mds requires start and length rather than start and end */
+	if (LLONG_MAX == fl->fl_end)
+		length = 0;
+	else
+		length = fl->fl_end - fl->fl_start + 1;
+
+	err = ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK,
+				file, (u64)fl->fl_pid, (u64)fl->fl_nspid,
+				lock_cmd, fl->fl_start,
+				length, wait);
+	if (!err) {
+		err = flock_lock_file_wait(file, fl);
+		if (err) {
+			ceph_lock_message(CEPH_LOCK_FLOCK,
+					  CEPH_MDS_OP_SETFILELOCK,
+					  file, (u64)fl->fl_pid,
+					  (u64)fl->fl_nspid,
+					  CEPH_LOCK_UNLOCK, fl->fl_start,
+					  length, 0);
+			dout("got %d on flock_lock_file_wait, undid lock", err);
+		}
+	} else {
+		dout("mds error code %d", err);
+	}
+	return err;
+}
+
+/**
+ * Must be called with BKL already held. Fills in the passed
+ * counter variables, so you can prepare pagelist metadata before calling
+ * ceph_encode_locks.
+ */
+void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
+{
+	struct file_lock *lock;
+
+	*fcntl_count = 0;
+	*flock_count = 0;
+
+	for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
+		if (lock->fl_flags & FL_POSIX)
+			++(*fcntl_count);
+		else if (lock->fl_flags & FL_FLOCK)
+			++(*flock_count);
+	}
+	dout("counted %d flock locks and %d fcntl locks",
+	     *flock_count, *fcntl_count);
+}
+
+/**
+ * Encode the flock and fcntl locks for the given inode into the pagelist.
+ * Format is: #fcntl locks, sequential fcntl locks, #flock locks,
+ * sequential flock locks.
+ * Must be called with BLK already held, and the lock numbers should have
+ * been gathered under the same lock holding window.
+ */
+int ceph_encode_locks(struct inode *inode, struct ceph_pagelist *pagelist,
+		      int num_fcntl_locks, int num_flock_locks)
+{
+	struct file_lock *lock;
+	struct ceph_filelock cephlock;
+	int err = 0;
+
+	dout("encoding %d flock and %d fcntl locks", num_flock_locks,
+	     num_fcntl_locks);
+	err = ceph_pagelist_append(pagelist, &num_fcntl_locks, sizeof(u32));
+	if (err)
+		goto fail;
+	for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
+		if (lock->fl_flags & FL_POSIX) {
+			err = lock_to_ceph_filelock(lock, &cephlock);
+			if (err)
+				goto fail;
+			err = ceph_pagelist_append(pagelist, &cephlock,
+					   sizeof(struct ceph_filelock));
+		}
+		if (err)
+			goto fail;
+	}
+
+	err = ceph_pagelist_append(pagelist, &num_flock_locks, sizeof(u32));
+	if (err)
+		goto fail;
+	for (lock = inode->i_flock; lock != NULL; lock = lock->fl_next) {
+		if (lock->fl_flags & FL_FLOCK) {
+			err = lock_to_ceph_filelock(lock, &cephlock);
+			if (err)
+				goto fail;
+			err = ceph_pagelist_append(pagelist, &cephlock,
+					   sizeof(struct ceph_filelock));
+		}
+		if (err)
+			goto fail;
+	}
+fail:
+	return err;
+}
+
+/*
+ * Given a pointer to a lock, convert it to a ceph filelock
+ */
+int lock_to_ceph_filelock(struct file_lock *lock,
+			  struct ceph_filelock *cephlock)
+{
+	int err = 0;
+
+	cephlock->start = cpu_to_le64(lock->fl_start);
+	cephlock->length = cpu_to_le64(lock->fl_end - lock->fl_start + 1);
+	cephlock->client = cpu_to_le64(0);
+	cephlock->pid = cpu_to_le64(lock->fl_pid);
+	cephlock->pid_namespace = cpu_to_le64((u64)lock->fl_nspid);
+
+	switch (lock->fl_type) {
+	case F_RDLCK:
+		cephlock->type = CEPH_LOCK_SHARED;
+		break;
+	case F_WRLCK:
+		cephlock->type = CEPH_LOCK_EXCL;
+		break;
+	case F_UNLCK:
+		cephlock->type = CEPH_LOCK_UNLOCK;
+		break;
+	default:
+		dout("Have unknown lock type %d", lock->fl_type);
+		err = -EINVAL;
+	}
+
+	return err;
+}

fs/ceph/mds_client.h

@@ -151,6 +151,7 @@ typedef void (*ceph_mds_request_callback_t) (struct ceph_mds_client *mdsc,
 struct ceph_mds_request {
 	u64 r_tid;                   /* transaction id */
 	struct rb_node r_node;
+	struct ceph_mds_client *r_mdsc;
 
 	int r_op;                    /* mds op code */
 	int r_mds;
@@ -207,8 +208,8 @@ struct ceph_mds_request {
 
 	int               r_attempts;   /* resend attempts */
 	int               r_num_fwd;    /* number of forward attempts */
-	int               r_num_stale;
 	int               r_resend_mds; /* mds to resend to next, if any*/
+	u32               r_sent_on_mseq; /* cap mseq request was sent at*/
 
 	struct kref       r_kref;
 	struct list_head  r_wait;
@@ -267,6 +268,27 @@ struct ceph_mds_client {
 	spinlock_t        cap_dirty_lock;   /* protects above items */
 	wait_queue_head_t cap_flushing_wq;
 
+	/*
+	 * Cap reservations
+	 *
+	 * Maintain a global pool of preallocated struct ceph_caps, referenced
+	 * by struct ceph_caps_reservations.  This ensures that we preallocate
+	 * memory needed to successfully process an MDS response.  (If an MDS
+	 * sends us cap information and we fail to process it, we will have
+	 * problems due to the client and MDS being out of sync.)
+	 *
+	 * Reservations are 'owned' by a ceph_cap_reservation context.
+	 */
+	spinlock_t	caps_list_lock;
+	struct		list_head caps_list; /* unused (reserved or
+						unreserved) */
+	int		caps_total_count;    /* total caps allocated */
+	int		caps_use_count;      /* in use */
+	int		caps_reserve_count;  /* unused, reserved */
+	int		caps_avail_count;    /* unused, unreserved */
+	int		caps_min_count;      /* keep at least this many
+						(unreserved) */
+
 #ifdef CONFIG_DEBUG_FS
 	struct dentry 	  *debugfs_file;
 #endif
@@ -324,8 +346,7 @@ static inline void ceph_mdsc_put_request(struct ceph_mds_request *req)
 }
 
 extern int ceph_add_cap_releases(struct ceph_mds_client *mdsc,
-				 struct ceph_mds_session *session,
-				 int extra);
+				 struct ceph_mds_session *session);
 extern void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
 				   struct ceph_mds_session *session);
 
@@ -343,4 +364,7 @@ extern void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session,
 extern void ceph_mdsc_handle_map(struct ceph_mds_client *mdsc,
 				 struct ceph_msg *msg);
 
+extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc,
+					  struct ceph_mds_session *session);
+
 #endif

fs/ceph/mdsmap.c

@@ -85,6 +85,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
 		struct ceph_entity_addr addr;
 		u32 num_export_targets;
 		void *pexport_targets = NULL;
+		struct ceph_timespec laggy_since;
 
 		ceph_decode_need(p, end, sizeof(u64)*2 + 1 + sizeof(u32), bad);
 		global_id = ceph_decode_64(p);
@@ -103,7 +104,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
 		state_seq = ceph_decode_64(p);
 		ceph_decode_copy(p, &addr, sizeof(addr));
 		ceph_decode_addr(&addr);
-		*p += sizeof(struct ceph_timespec);
+		ceph_decode_copy(p, &laggy_since, sizeof(laggy_since));
 		*p += sizeof(u32);
 		ceph_decode_32_safe(p, end, namelen, bad);
 		*p += namelen;
@@ -122,6 +123,9 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
 			m->m_info[mds].global_id = global_id;
 			m->m_info[mds].state = state;
 			m->m_info[mds].addr = addr;
+			m->m_info[mds].laggy =
+				(laggy_since.tv_sec != 0 ||
+				 laggy_since.tv_nsec != 0);
 			m->m_info[mds].num_export_targets = num_export_targets;
 			if (num_export_targets) {
 				m->m_info[mds].export_targets =

fs/ceph/mdsmap.h

@@ -13,6 +13,7 @@ struct ceph_mds_info {
 	struct ceph_entity_addr addr;
 	s32 state;
 	int num_export_targets;
+	bool laggy;
 	u32 *export_targets;
 };
 
@@ -47,6 +48,13 @@ static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
 	return m->m_info[w].state;
 }
 
+static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
+{
+	if (w >= 0 && w < m->m_max_mds)
+		return m->m_info[w].laggy;
+	return false;
+}
+
 extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
 extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
 extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);

fs/ceph/messenger.c

@@ -108,7 +108,7 @@ void ceph_msgr_exit(void)
 	destroy_workqueue(ceph_msgr_wq);
 }
 
-void ceph_msgr_flush()
+void ceph_msgr_flush(void)
 {
 	flush_workqueue(ceph_msgr_wq);
 }
@@ -647,7 +647,7 @@ static void prepare_write_connect(struct ceph_messenger *msgr,
 	dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,
 	     con->connect_seq, global_seq, proto);
 
-	con->out_connect.features = cpu_to_le64(CEPH_FEATURE_SUPPORTED_CLIENT);
+	con->out_connect.features = cpu_to_le64(CEPH_FEATURE_SUPPORTED);
 	con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);
 	con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);
 	con->out_connect.global_seq = cpu_to_le32(global_seq);
@@ -1081,11 +1081,11 @@ static int process_banner(struct ceph_connection *con)
 		   sizeof(con->peer_addr)) != 0 &&
 	    !(addr_is_blank(&con->actual_peer_addr.in_addr) &&
 	      con->actual_peer_addr.nonce == con->peer_addr.nonce)) {
-		pr_warning("wrong peer, want %s/%lld, got %s/%lld\n",
+		pr_warning("wrong peer, want %s/%d, got %s/%d\n",
 			   pr_addr(&con->peer_addr.in_addr),
-			   le64_to_cpu(con->peer_addr.nonce),
+			   (int)le32_to_cpu(con->peer_addr.nonce),
 			   pr_addr(&con->actual_peer_addr.in_addr),
-			   le64_to_cpu(con->actual_peer_addr.nonce));
+			   (int)le32_to_cpu(con->actual_peer_addr.nonce));
 		con->error_msg = "wrong peer at address";
 		return -1;
 	}
@@ -1123,8 +1123,8 @@ static void fail_protocol(struct ceph_connection *con)
 
 static int process_connect(struct ceph_connection *con)
 {
-	u64 sup_feat = CEPH_FEATURE_SUPPORTED_CLIENT;
-	u64 req_feat = CEPH_FEATURE_REQUIRED_CLIENT;
+	u64 sup_feat = CEPH_FEATURE_SUPPORTED;
+	u64 req_feat = CEPH_FEATURE_REQUIRED;
 	u64 server_feat = le64_to_cpu(con->in_reply.features);
 
 	dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
@@ -1302,8 +1302,8 @@ static void process_ack(struct ceph_connection *con)
 
 
 static int read_partial_message_section(struct ceph_connection *con,
-					struct kvec *section, unsigned int sec_len,
-					u32 *crc)
+					struct kvec *section,
+					unsigned int sec_len, u32 *crc)
 {
 	int left;
 	int ret;
@@ -1434,7 +1434,8 @@ static int read_partial_message(struct ceph_connection *con)
 
 	/* middle */
 	if (m->middle) {
-		ret = read_partial_message_section(con, &m->middle->vec, middle_len,
+		ret = read_partial_message_section(con, &m->middle->vec,
+						   middle_len,
 						   &con->in_middle_crc);
 		if (ret <= 0)
 			return ret;

fs/ceph/mon_client.c

@@ -349,7 +349,7 @@ static void ceph_monc_handle_map(struct ceph_mon_client *monc,
 }
 
 /*
- * statfs
+ * generic requests (e.g., statfs, poolop)
  */
 static struct ceph_mon_generic_request *__lookup_generic_req(
 	struct ceph_mon_client *monc, u64 tid)
@@ -442,6 +442,35 @@ static struct ceph_msg *get_generic_reply(struct ceph_connection *con,
 	return m;
 }
 
+static int do_generic_request(struct ceph_mon_client *monc,
+			      struct ceph_mon_generic_request *req)
+{
+	int err;
+
+	/* register request */
+	mutex_lock(&monc->mutex);
+	req->tid = ++monc->last_tid;
+	req->request->hdr.tid = cpu_to_le64(req->tid);
+	__insert_generic_request(monc, req);
+	monc->num_generic_requests++;
+	ceph_con_send(monc->con, ceph_msg_get(req->request));
+	mutex_unlock(&monc->mutex);
+
+	err = wait_for_completion_interruptible(&req->completion);
+
+	mutex_lock(&monc->mutex);
+	rb_erase(&req->node, &monc->generic_request_tree);
+	monc->num_generic_requests--;
+	mutex_unlock(&monc->mutex);
+
+	if (!err)
+		err = req->result;
+	return err;
+}
+
+/*
+ * statfs
+ */
 static void handle_statfs_reply(struct ceph_mon_client *monc,
 				struct ceph_msg *msg)
 {
@@ -468,7 +497,7 @@ static void handle_statfs_reply(struct ceph_mon_client *monc,
 	return;
 
 bad:
-	pr_err("corrupt generic reply, no tid\n");
+	pr_err("corrupt generic reply, tid %llu\n", tid);
 	ceph_msg_dump(msg);
 }
 
@@ -487,6 +516,7 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
 
 	kref_init(&req->kref);
 	req->buf = buf;
+	req->buf_len = sizeof(*buf);
 	init_completion(&req->completion);
 
 	err = -ENOMEM;
@@ -504,33 +534,134 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
 	h->monhdr.session_mon_tid = 0;
 	h->fsid = monc->monmap->fsid;
 
-	/* register request */
-	mutex_lock(&monc->mutex);
-	req->tid = ++monc->last_tid;
-	req->request->hdr.tid = cpu_to_le64(req->tid);
-	__insert_generic_request(monc, req);
-	monc->num_generic_requests++;
-	mutex_unlock(&monc->mutex);
+	err = do_generic_request(monc, req);
 
-	/* send request and wait */
-	ceph_con_send(monc->con, ceph_msg_get(req->request));
-	err = wait_for_completion_interruptible(&req->completion);
+out:
+	kref_put(&req->kref, release_generic_request);
+	return err;
+}
+
+/*
+ * pool ops
+ */
+static int get_poolop_reply_buf(const char *src, size_t src_len,
+				char *dst, size_t dst_len)
+{
+	u32 buf_len;
+
+	if (src_len != sizeof(u32) + dst_len)
+		return -EINVAL;
+
+	buf_len = le32_to_cpu(*(u32 *)src);
+	if (buf_len != dst_len)
+		return -EINVAL;
+
+	memcpy(dst, src + sizeof(u32), dst_len);
+	return 0;
+}
+
+static void handle_poolop_reply(struct ceph_mon_client *monc,
+				struct ceph_msg *msg)
+{
+	struct ceph_mon_generic_request *req;
+	struct ceph_mon_poolop_reply *reply = msg->front.iov_base;
+	u64 tid = le64_to_cpu(msg->hdr.tid);
+
+	if (msg->front.iov_len < sizeof(*reply))
+		goto bad;
+	dout("handle_poolop_reply %p tid %llu\n", msg, tid);
 
 	mutex_lock(&monc->mutex);
-	rb_erase(&req->node, &monc->generic_request_tree);
-	monc->num_generic_requests--;
+	req = __lookup_generic_req(monc, tid);
+	if (req) {
+		if (req->buf_len &&
+		    get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply),
+				     msg->front.iov_len - sizeof(*reply),
+				     req->buf, req->buf_len) < 0) {
+			mutex_unlock(&monc->mutex);
+			goto bad;
+		}
+		req->result = le32_to_cpu(reply->reply_code);
+		get_generic_request(req);
+	}
 	mutex_unlock(&monc->mutex);
+	if (req) {
+		complete(&req->completion);
+		put_generic_request(req);
+	}
+	return;
 
-	if (!err)
-		err = req->result;
+bad:
+	pr_err("corrupt generic reply, tid %llu\n", tid);
+	ceph_msg_dump(msg);
+}
+
+/*
+ * Do a synchronous pool op.
+ */
+int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op,
+			u32 pool, u64 snapid,
+			char *buf, int len)
+{
+	struct ceph_mon_generic_request *req;
+	struct ceph_mon_poolop *h;
+	int err;
+
+	req = kzalloc(sizeof(*req), GFP_NOFS);
+	if (!req)
+		return -ENOMEM;
+
+	kref_init(&req->kref);
+	req->buf = buf;
+	req->buf_len = len;
+	init_completion(&req->completion);
+
+	err = -ENOMEM;
+	req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS);
+	if (!req->request)
+		goto out;
+	req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS);
+	if (!req->reply)
+		goto out;
+
+	/* fill out request */
+	req->request->hdr.version = cpu_to_le16(2);
+	h = req->request->front.iov_base;
+	h->monhdr.have_version = 0;
+	h->monhdr.session_mon = cpu_to_le16(-1);
+	h->monhdr.session_mon_tid = 0;
+	h->fsid = monc->monmap->fsid;
+	h->pool = cpu_to_le32(pool);
+	h->op = cpu_to_le32(op);
+	h->auid = 0;
+	h->snapid = cpu_to_le64(snapid);
+	h->name_len = 0;
+
+	err = do_generic_request(monc, req);
 
 out:
 	kref_put(&req->kref, release_generic_request);
 	return err;
 }
 
+int ceph_monc_create_snapid(struct ceph_mon_client *monc,
+			    u32 pool, u64 *snapid)
+{
+	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
+				   pool, 0, (char *)snapid, sizeof(*snapid));
+
+}
+
+int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
+			    u32 pool, u64 snapid)
+{
+	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
+				   pool, snapid, 0, 0);
+
+}
+
 /*
- * Resend pending statfs requests.
+ * Resend pending generic requests.
  */
 static void __resend_generic_request(struct ceph_mon_client *monc)
 {
@@ -783,6 +914,10 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
 		handle_statfs_reply(monc, msg);
 		break;
 
+	case CEPH_MSG_POOLOP_REPLY:
+		handle_poolop_reply(monc, msg);
+		break;
+
 	case CEPH_MSG_MON_MAP:
 		ceph_monc_handle_map(monc, msg);
 		break;
@@ -820,6 +955,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
 	case CEPH_MSG_MON_SUBSCRIBE_ACK:
 		m = ceph_msg_get(monc->m_subscribe_ack);
 		break;
+	case CEPH_MSG_POOLOP_REPLY:
 	case CEPH_MSG_STATFS_REPLY:
 		return get_generic_reply(con, hdr, skip);
 	case CEPH_MSG_AUTH_REPLY:

fs/ceph/mon_client.h

@@ -50,6 +50,7 @@ struct ceph_mon_generic_request {
 	struct rb_node node;
 	int result;
 	void *buf;
+	int buf_len;
 	struct completion completion;
 	struct ceph_msg *request;  /* original request */
 	struct ceph_msg *reply;    /* and reply */
@@ -111,6 +112,10 @@ extern int ceph_monc_open_session(struct ceph_mon_client *monc);
 
 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
 
+extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,
+				   u32 pool, u64 *snapid);
 
+extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
+				   u32 pool, u64 snapid);
 
 #endif

fs/ceph/msgr.h

-#ifndef __MSGR_H
-#define __MSGR_H
+#ifndef CEPH_MSGR_H
+#define CEPH_MSGR_H
 
 /*
  * Data types for message passing layer used by Ceph.

fs/ceph/osd_client.c

@@ -1276,8 +1276,6 @@ int ceph_osdc_readpages(struct ceph_osd_client *osdc,
 
 	/* it may be a short read due to an object boundary */
 	req->r_pages = pages;
-	num_pages = calc_pages_for(off, *plen);
-	req->r_num_pages = num_pages;
 
 	dout("readpages  final extent is %llu~%llu (%d pages)\n",
 	     off, *plen, req->r_num_pages);
@@ -1319,7 +1317,6 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
 
 	/* it may be a short write due to an object boundary */
 	req->r_pages = pages;
-	req->r_num_pages = calc_pages_for(off, len);
 	dout("writepages %llu~%llu (%d pages)\n", off, len,
 	     req->r_num_pages);
 

fs/ceph/osdmap.c

@@ -424,12 +424,30 @@ static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
 	kfree(pi);
 }
 
-void __decode_pool(void **p, struct ceph_pg_pool_info *pi)
+static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
 {
+	unsigned n, m;
+
 	ceph_decode_copy(p, &pi->v, sizeof(pi->v));
 	calc_pg_masks(pi);
-	*p += le32_to_cpu(pi->v.num_snaps) * sizeof(u64);
+
+	/* num_snaps * snap_info_t */
+	n = le32_to_cpu(pi->v.num_snaps);
+	while (n--) {
+		ceph_decode_need(p, end, sizeof(u64) + 1 + sizeof(u64) +
+				 sizeof(struct ceph_timespec), bad);
+		*p += sizeof(u64) +       /* key */
+			1 + sizeof(u64) + /* u8, snapid */
+			sizeof(struct ceph_timespec);
+		m = ceph_decode_32(p);    /* snap name */
+		*p += m;
+	}
+
 	*p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
+	return 0;
+
+bad:
+	return -EINVAL;
 }
 
 static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
@@ -571,7 +589,9 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
 			kfree(pi);
 			goto bad;
 		}
-		__decode_pool(p, pi);
+		err = __decode_pool(p, end, pi);
+		if (err < 0)
+			goto bad;
 		__insert_pg_pool(&map->pg_pools, pi);
 	}
 
@@ -760,7 +780,9 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
 			pi->id = pool;
 			__insert_pg_pool(&map->pg_pools, pi);
 		}
-		__decode_pool(p, pi);
+		err = __decode_pool(p, end, pi);
+		if (err < 0)
+			goto bad;
 	}
 	if (version >= 5 && __decode_pool_names(p, end, map) < 0)
 		goto bad;
@@ -1026,8 +1048,9 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
 	ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
 				 pool->v.type, pool->v.size);
 	if (ruleno < 0) {
-		pr_err("no crush rule pool %d type %d size %d\n",
-		       poolid, pool->v.type, pool->v.size);
+		pr_err("no crush rule pool %d ruleset %d type %d size %d\n",
+		       poolid, pool->v.crush_ruleset, pool->v.type,
+		       pool->v.size);
 		return NULL;
 	}
 

fs/ceph/rados.h

-#ifndef __RADOS_H
-#define __RADOS_H
+#ifndef CEPH_RADOS_H
+#define CEPH_RADOS_H
 
 /*
  * Data types for the Ceph distributed object storage layer RADOS
@@ -203,6 +203,7 @@ enum {
 	CEPH_OSD_OP_TMAPGET = CEPH_OSD_OP_MODE_RD | CEPH_OSD_OP_TYPE_DATA | 12,
 
 	CEPH_OSD_OP_CREATE  = CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 13,
+	CEPH_OSD_OP_ROLLBACK= CEPH_OSD_OP_MODE_WR | CEPH_OSD_OP_TYPE_DATA | 14,
 
 	/** attrs **/
 	/* read */
@@ -272,6 +273,10 @@ static inline int ceph_osd_op_mode_modify(int op)
 	return (op & CEPH_OSD_OP_MODE) == CEPH_OSD_OP_MODE_WR;
 }
 
+/*
+ * note that the following tmap stuff is also defined in the ceph librados.h
+ * any modification here needs to be updated there
+ */
 #define CEPH_OSD_TMAP_HDR 'h'
 #define CEPH_OSD_TMAP_SET 's'
 #define CEPH_OSD_TMAP_RM  'r'
@@ -297,6 +302,7 @@ enum {
 	CEPH_OSD_FLAG_PARALLELEXEC = 512, /* execute op in parallel */
 	CEPH_OSD_FLAG_PGOP = 1024,      /* pg op, no object */
 	CEPH_OSD_FLAG_EXEC = 2048,      /* op may exec */
+	CEPH_OSD_FLAG_EXEC_PUBLIC = 4096, /* op may exec (public) */
 };
 
 enum {
@@ -350,6 +356,9 @@ struct ceph_osd_op {
 		struct {
 			__le64 cookie, count;
 		} __attribute__ ((packed)) pgls;
+	        struct {
+		        __le64 snapid;
+	        } __attribute__ ((packed)) snap;
 	};
 	__le32 payload_len;
 } __attribute__ ((packed));

fs/ceph/super.c

@@ -2,6 +2,7 @@
 #include "ceph_debug.h"
 
 #include <linux/backing-dev.h>
+#include <linux/ctype.h>
 #include <linux/fs.h>
 #include <linux/inet.h>
 #include <linux/in6.h>
@@ -101,12 +102,21 @@ static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
 }
 
 
-static int ceph_syncfs(struct super_block *sb, int wait)
+static int ceph_sync_fs(struct super_block *sb, int wait)
 {
-	dout("sync_fs %d\n", wait);
+	struct ceph_client *client = ceph_sb_to_client(sb);
+
+	if (!wait) {
+		dout("sync_fs (non-blocking)\n");
+		ceph_flush_dirty_caps(&client->mdsc);
+		dout("sync_fs (non-blocking) done\n");
+		return 0;
+	}
+
+	dout("sync_fs (blocking)\n");
 	ceph_osdc_sync(&ceph_sb_to_client(sb)->osdc);
 	ceph_mdsc_sync(&ceph_sb_to_client(sb)->mdsc);
-	dout("sync_fs %d done\n", wait);
+	dout("sync_fs (blocking) done\n");
 	return 0;
 }
 
@@ -150,9 +160,7 @@ static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
 	struct ceph_mount_args *args = client->mount_args;
 
 	if (args->flags & CEPH_OPT_FSID)
-		seq_printf(m, ",fsidmajor=%llu,fsidminor%llu",
-			   le64_to_cpu(*(__le64 *)&args->fsid.fsid[0]),
-			   le64_to_cpu(*(__le64 *)&args->fsid.fsid[8]));
+		seq_printf(m, ",fsid=%pU", &args->fsid);
 	if (args->flags & CEPH_OPT_NOSHARE)
 		seq_puts(m, ",noshare");
 	if (args->flags & CEPH_OPT_DIRSTAT)
@@ -279,7 +287,7 @@ static const struct super_operations ceph_super_ops = {
 	.alloc_inode	= ceph_alloc_inode,
 	.destroy_inode	= ceph_destroy_inode,
 	.write_inode    = ceph_write_inode,
-	.sync_fs        = ceph_syncfs,
+	.sync_fs        = ceph_sync_fs,
 	.put_super	= ceph_put_super,
 	.show_options   = ceph_show_options,
 	.statfs		= ceph_statfs,
@@ -322,9 +330,6 @@ const char *ceph_msg_type_name(int type)
  * mount options
  */
 enum {
-	Opt_fsidmajor,
-	Opt_fsidminor,
-	Opt_monport,
 	Opt_wsize,
 	Opt_rsize,
 	Opt_osdtimeout,
@@ -339,6 +344,7 @@ enum {
 	Opt_congestion_kb,
 	Opt_last_int,
 	/* int args above */
+	Opt_fsid,
 	Opt_snapdirname,
 	Opt_name,
 	Opt_secret,
@@ -355,9 +361,6 @@ enum {
 };
 
 static match_table_t arg_tokens = {
-	{Opt_fsidmajor, "fsidmajor=%ld"},
-	{Opt_fsidminor, "fsidminor=%ld"},
-	{Opt_monport, "monport=%d"},
 	{Opt_wsize, "wsize=%d"},
 	{Opt_rsize, "rsize=%d"},
 	{Opt_osdtimeout, "osdtimeout=%d"},
@@ -371,6 +374,7 @@ static match_table_t arg_tokens = {
 	{Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
 	{Opt_congestion_kb, "write_congestion_kb=%d"},
 	/* int args above */
+	{Opt_fsid, "fsid=%s"},
 	{Opt_snapdirname, "snapdirname=%s"},
 	{Opt_name, "name=%s"},
 	{Opt_secret, "secret=%s"},
@@ -386,6 +390,36 @@ static match_table_t arg_tokens = {
 	{-1, NULL}
 };
 
+static int parse_fsid(const char *str, struct ceph_fsid *fsid)
+{
+	int i = 0;
+	char tmp[3];
+	int err = -EINVAL;
+	int d;
+
+	dout("parse_fsid '%s'\n", str);
+	tmp[2] = 0;
+	while (*str && i < 16) {
+		if (ispunct(*str)) {
+			str++;
+			continue;
+		}
+		if (!isxdigit(str[0]) || !isxdigit(str[1]))
+			break;
+		tmp[0] = str[0];
+		tmp[1] = str[1];
+		if (sscanf(tmp, "%x", &d) < 1)
+			break;
+		fsid->fsid[i] = d & 0xff;
+		i++;
+		str += 2;
+	}
+
+	if (i == 16)
+		err = 0;
+	dout("parse_fsid ret %d got fsid %pU", err, fsid);
+	return err;
+}
 
 static struct ceph_mount_args *parse_mount_args(int flags, char *options,
 						const char *dev_name,
@@ -469,12 +503,6 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
 			dout("got token %d\n", token);
 		}
 		switch (token) {
-		case Opt_fsidmajor:
-			*(__le64 *)&args->fsid.fsid[0] = cpu_to_le64(intval);
-			break;
-		case Opt_fsidminor:
-			*(__le64 *)&args->fsid.fsid[8] = cpu_to_le64(intval);
-			break;
 		case Opt_ip:
 			err = ceph_parse_ips(argstr[0].from,
 					     argstr[0].to,
@@ -485,6 +513,11 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
 			args->flags |= CEPH_OPT_MYIP;
 			break;
 
+		case Opt_fsid:
+			err = parse_fsid(argstr[0].from, &args->fsid);
+			if (err == 0)
+				args->flags |= CEPH_OPT_FSID;
+			break;
 		case Opt_snapdirname:
 			kfree(args->snapdir_name);
 			args->snapdir_name = kstrndup(argstr[0].from,
@@ -515,6 +548,9 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
 		case Opt_osdkeepalivetimeout:
 			args->osd_keepalive_timeout = intval;
 			break;
+		case Opt_osd_idle_ttl:
+			args->osd_idle_ttl = intval;
+			break;
 		case Opt_mount_timeout:
 			args->mount_timeout = intval;
 			break;
@@ -630,7 +666,6 @@ static struct ceph_client *ceph_create_client(struct ceph_mount_args *args)
 
 	/* caps */
 	client->min_caps = args->max_readdir;
-	ceph_adjust_min_caps(client->min_caps);
 
 	/* subsystems */
 	err = ceph_monc_init(&client->monc, client);
@@ -680,8 +715,6 @@ static void ceph_destroy_client(struct ceph_client *client)
 
 	ceph_monc_stop(&client->monc);
 
-	ceph_adjust_min_caps(-client->min_caps);
-
 	ceph_debugfs_client_cleanup(client);
 	destroy_workqueue(client->wb_wq);
 	destroy_workqueue(client->pg_inv_wq);
@@ -706,13 +739,13 @@ int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
 {
 	if (client->have_fsid) {
 		if (ceph_fsid_compare(&client->fsid, fsid)) {
-			pr_err("bad fsid, had " FSID_FORMAT " got " FSID_FORMAT,
-			       PR_FSID(&client->fsid), PR_FSID(fsid));
+			pr_err("bad fsid, had %pU got %pU",
+			       &client->fsid, fsid);
 			return -1;
 		}
 	} else {
-		pr_info("client%lld fsid " FSID_FORMAT "\n",
-			client->monc.auth->global_id, PR_FSID(fsid));
+		pr_info("client%lld fsid %pU\n", client->monc.auth->global_id,
+			fsid);
 		memcpy(&client->fsid, fsid, sizeof(*fsid));
 		ceph_debugfs_client_init(client);
 		client->have_fsid = true;
@@ -1043,8 +1076,6 @@ static int __init init_ceph(void)
 	if (ret)
 		goto out_msgr;
 
-	ceph_caps_init();
-
 	ret = register_filesystem(&ceph_fs_type);
 	if (ret)
 		goto out_icache;
@@ -1069,7 +1100,6 @@ static void __exit exit_ceph(void)
 {
 	dout("exit_ceph\n");
 	unregister_filesystem(&ceph_fs_type);
-	ceph_caps_finalize();
 	destroy_caches();
 	ceph_msgr_exit();
 	ceph_debugfs_cleanup();

fs/ceph/super.h

@@ -30,6 +30,12 @@
 #define CEPH_BLOCK_SHIFT   20  /* 1 MB */
 #define CEPH_BLOCK         (1 << CEPH_BLOCK_SHIFT)
 
+/*
+ * Supported features
+ */
+#define CEPH_FEATURE_SUPPORTED CEPH_FEATURE_NOSRCADDR | CEPH_FEATURE_FLOCK
+#define CEPH_FEATURE_REQUIRED  CEPH_FEATURE_NOSRCADDR
+
 /*
  * mount options
  */
@@ -560,11 +566,13 @@ static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
 /* what the mds thinks we want */
 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
 
-extern void ceph_caps_init(void);
-extern void ceph_caps_finalize(void);
-extern void ceph_adjust_min_caps(int delta);
-extern int ceph_reserve_caps(struct ceph_cap_reservation *ctx, int need);
-extern int ceph_unreserve_caps(struct ceph_cap_reservation *ctx);
+extern void ceph_caps_init(struct ceph_mds_client *mdsc);
+extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
+extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
+extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
+			     struct ceph_cap_reservation *ctx, int need);
+extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc,
+			       struct ceph_cap_reservation *ctx);
 extern void ceph_reservation_status(struct ceph_client *client,
 				    int *total, int *avail, int *used,
 				    int *reserved, int *min);
@@ -738,13 +746,6 @@ extern struct kmem_cache *ceph_file_cachep;
 extern const char *ceph_msg_type_name(int type);
 extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
 
-#define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
-	"%02x%02x%02x%02x%02x%02x"
-#define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \
-		(f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7],    \
-		(f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11],  \
-		(f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15]
-
 /* inode.c */
 extern const struct inode_operations ceph_file_iops;
 
@@ -806,13 +807,16 @@ static inline void ceph_remove_cap(struct ceph_cap *cap)
 	__ceph_remove_cap(cap);
 	spin_unlock(&inode->i_lock);
 }
-extern void ceph_put_cap(struct ceph_cap *cap);
+extern void ceph_put_cap(struct ceph_mds_client *mdsc,
+			 struct ceph_cap *cap);
 
 extern void ceph_queue_caps_release(struct inode *inode);
 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
 extern int ceph_fsync(struct file *file, int datasync);
 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
 				    struct ceph_mds_session *session);
+extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
+					     int mds);
 extern int ceph_get_cap_mds(struct inode *inode);
 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
@@ -857,7 +861,7 @@ extern void ceph_release_page_vector(struct page **pages, int num_pages);
 /* dir.c */
 extern const struct file_operations ceph_dir_fops;
 extern const struct inode_operations ceph_dir_iops;
-extern struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
+extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
 	ceph_snapdir_dentry_ops;
 
 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
@@ -888,6 +892,14 @@ extern void ceph_debugfs_cleanup(void);
 extern int ceph_debugfs_client_init(struct ceph_client *client);
 extern void ceph_debugfs_client_cleanup(struct ceph_client *client);
 
+/* locks.c */
+extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
+extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
+extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
+extern int ceph_encode_locks(struct inode *i, struct ceph_pagelist *p,
+			     int p_locks, int f_locks);
+extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
+
 static inline struct inode *get_dentry_parent_inode(struct dentry *dentry)
 {
 	if (dentry && dentry->d_parent)

fs/ceph/xattr.c

@@ -337,6 +337,8 @@ void __ceph_destroy_xattrs(struct ceph_inode_info *ci)
 }
 
 static int __build_xattrs(struct inode *inode)
+	__releases(inode->i_lock)
+	__acquires(inode->i_lock)
 {
 	u32 namelen;
 	u32 numattr = 0;