Merge tag 'ceph-for-5.17-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The highlight is the new mount "device" string syntax implemented by
  Venky Shankar. It solves some long-standing issues with using
  different auth entities and/or mounting different CephFS filesystems
  from the same cluster, remounting and also misleading /proc/mounts
  contents. The existing syntax of course remains to be maintained.

  On top of that, there is a couple of fixes for edge cases in quota and
  a new mount option for turning on unbuffered I/O mode globally instead
  of on a per-file basis with ioctl(CEPH_IOC_SYNCIO)"

* tag 'ceph-for-5.17-rc1' of git://github.com/ceph/ceph-client:
  ceph: move CEPH_SUPER_MAGIC definition to magic.h
  ceph: remove redundant Lsx caps check
  ceph: add new "nopagecache" option
  ceph: don't check for quotas on MDS stray dirs
  ceph: drop send metrics debug message
  rbd: make const pointer spaces a static const array
  ceph: Fix incorrect statfs report for small quota
  ceph: mount syntax module parameter
  doc: document new CephFS mount device syntax
  ceph: record updated mon_addr on remount
  ceph: new device mount syntax
  libceph: rename parse_fsid() to ceph_parse_fsid() and export
  libceph: generalize addr/ip parsing based on delimiter

1 files changed, 17 insertions, 11 deletions

diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index d0142cc5c41b..67f145e1ae7a 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -24,13 +24,11 @@
 #include <linux/fscache.h>
 #endif
 
-/* f_type in struct statfs */
-#define CEPH_SUPER_MAGIC 0x00c36400
-
 /* large granularity for statfs utilization stats to facilitate
  * large volume sizes on 32-bit machines. */
 #define CEPH_BLOCK_SHIFT   22  /* 4 MB */
 #define CEPH_BLOCK         (1 << CEPH_BLOCK_SHIFT)
+#define CEPH_4K_BLOCK_SHIFT 12  /* 4 KB */
 
 #define CEPH_MOUNT_OPT_CLEANRECOVER    (1<<1) /* auto reonnect (clean mode) after blocklisted */
 #define CEPH_MOUNT_OPT_DIRSTAT         (1<<4) /* `cat dirname` for stats */
@@ -44,6 +42,7 @@
 #define CEPH_MOUNT_OPT_NOQUOTADF       (1<<13) /* no root dir quota in statfs */
 #define CEPH_MOUNT_OPT_NOCOPYFROM      (1<<14) /* don't use RADOS 'copy-from' op */
 #define CEPH_MOUNT_OPT_ASYNC_DIROPS    (1<<15) /* allow async directory ops */
+#define CEPH_MOUNT_OPT_NOPAGECACHE     (1<<16) /* bypass pagecache altogether */
 
 #define CEPH_MOUNT_OPT_DEFAULT			\
 	(CEPH_MOUNT_OPT_DCACHE |		\
@@ -88,6 +87,8 @@ struct ceph_mount_options {
 	unsigned int max_readdir;       /* max readdir result (entries) */
 	unsigned int max_readdir_bytes; /* max readdir result (bytes) */
 
+	bool new_dev_syntax;
+
 	/*
 	 * everything above this point can be memcmp'd; everything below
 	 * is handled in compare_mount_options()
@@ -97,6 +98,7 @@ struct ceph_mount_options {
 	char *mds_namespace;  /* default NULL */
 	char *server_path;    /* default NULL (means "/") */
 	char *fscache_uniq;   /* default NULL */
+	char *mon_addr;
 };
 
 struct ceph_fs_client {
@@ -534,19 +536,23 @@ static inline int ceph_ino_compare(struct inode *inode, void *data)
  *
  * These come from src/mds/mdstypes.h in the ceph sources.
  */
-#define CEPH_MAX_MDS		0x100
-#define CEPH_NUM_STRAY		10
+#define CEPH_MAX_MDS			0x100
+#define CEPH_NUM_STRAY			10
 #define CEPH_MDS_INO_MDSDIR_OFFSET	(1 * CEPH_MAX_MDS)
+#define CEPH_MDS_INO_LOG_OFFSET		(2 * CEPH_MAX_MDS)
 #define CEPH_INO_SYSTEM_BASE		((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY))
 
 static inline bool ceph_vino_is_reserved(const struct ceph_vino vino)
 {
-	if (vino.ino < CEPH_INO_SYSTEM_BASE &&
-	    vino.ino >= CEPH_MDS_INO_MDSDIR_OFFSET) {
-		WARN_RATELIMIT(1, "Attempt to access reserved inode number 0x%llx", vino.ino);
-		return true;
-	}
-	return false;
+	if (vino.ino >= CEPH_INO_SYSTEM_BASE ||
+	    vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET)
+		return false;
+
+	/* Don't warn on mdsdirs */
+	WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET,
+			"Attempt to access reserved inode number 0x%llx",
+			vino.ino);
+	return true;
 }
 
 static inline struct inode *ceph_find_inode(struct super_block *sb,