Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 439 insertions, 0 deletions

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
new file mode 100644
index 000000000..7e0bf952e
--- /dev/null
+++ b/fs/xfs/xfs_mount.h
@@ -0,0 +1,439 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_MOUNT_H__
+#define	__XFS_MOUNT_H__
+
+struct xlog;
+struct xfs_inode;
+struct xfs_mru_cache;
+struct xfs_nameops;
+struct xfs_ail;
+struct xfs_quotainfo;
+struct xfs_dir_ops;
+struct xfs_da_geometry;
+
+/* dynamic preallocation free space thresholds, 5% down to 1% */
+enum {
+	XFS_LOWSP_1_PCNT = 0,
+	XFS_LOWSP_2_PCNT,
+	XFS_LOWSP_3_PCNT,
+	XFS_LOWSP_4_PCNT,
+	XFS_LOWSP_5_PCNT,
+	XFS_LOWSP_MAX,
+};
+
+/*
+ * Error Configuration
+ *
+ * Error classes define the subsystem the configuration belongs to.
+ * Error numbers define the errors that are configurable.
+ */
+enum {
+	XFS_ERR_METADATA,
+	XFS_ERR_CLASS_MAX,
+};
+enum {
+	XFS_ERR_DEFAULT,
+	XFS_ERR_EIO,
+	XFS_ERR_ENOSPC,
+	XFS_ERR_ENODEV,
+	XFS_ERR_ERRNO_MAX,
+};
+
+#define XFS_ERR_RETRY_FOREVER	-1
+
+/*
+ * Although retry_timeout is in jiffies which is normally an unsigned long,
+ * we limit the retry timeout to 86400 seconds, or one day.  So even a
+ * signed 32-bit long is sufficient for a HZ value up to 24855.  Making it
+ * signed lets us store the special "-1" value, meaning retry forever.
+ */
+struct xfs_error_cfg {
+	struct xfs_kobj	kobj;
+	int		max_retries;
+	long		retry_timeout;	/* in jiffies, -1 = infinite */
+};
+
+typedef struct xfs_mount {
+	struct super_block	*m_super;
+	xfs_tid_t		m_tid;		/* next unused tid for fs */
+	struct xfs_ail		*m_ail;		/* fs active log item list */
+
+	struct xfs_sb		m_sb;		/* copy of fs superblock */
+	spinlock_t		m_sb_lock;	/* sb counter lock */
+	struct percpu_counter	m_icount;	/* allocated inodes counter */
+	struct percpu_counter	m_ifree;	/* free inodes counter */
+	struct percpu_counter	m_fdblocks;	/* free block counter */
+
+	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
+	char			*m_fsname;	/* filesystem name */
+	int			m_fsname_len;	/* strlen of fs name */
+	char			*m_rtname;	/* realtime device name */
+	char			*m_logname;	/* external log device name */
+	int			m_bsize;	/* fs logical block size */
+	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
+	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
+	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */
+	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
+	uint			m_readio_log;	/* min read size log bytes */
+	uint			m_readio_blocks; /* min read size blocks */
+	uint			m_writeio_log;	/* min write size log bytes */
+	uint			m_writeio_blocks; /* min write size blocks */
+	struct xfs_da_geometry	*m_dir_geo;	/* directory block geometry */
+	struct xfs_da_geometry	*m_attr_geo;	/* attribute block geometry */
+	struct xlog		*m_log;		/* log specific stuff */
+	int			m_logbufs;	/* number of log buffers */
+	int			m_logbsize;	/* size of each log buffer */
+	uint			m_rsumlevels;	/* rt summary levels */
+	uint			m_rsumsize;	/* size of rt summary, bytes */
+	struct xfs_inode	*m_rbmip;	/* pointer to bitmap inode */
+	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
+	struct xfs_inode	*m_rootip;	/* pointer to root directory */
+	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
+	xfs_buftarg_t		*m_ddev_targp;	/* saves taking the address */
+	xfs_buftarg_t		*m_logdev_targp;/* ptr to log device */
+	xfs_buftarg_t		*m_rtdev_targp;	/* ptr to rt device */
+	uint8_t			m_blkbit_log;	/* blocklog + NBBY */
+	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
+	uint8_t			m_agno_log;	/* log #ag's */
+	uint8_t			m_agino_log;	/* #bits for agino in inum */
+	uint			m_inode_cluster_size;/* min inode buf size */
+	uint			m_blockmask;	/* sb_blocksize-1 */
+	uint			m_blockwsize;	/* sb_blocksize in words */
+	uint			m_blockwmask;	/* blockwsize-1 */
+	uint			m_alloc_mxr[2];	/* max alloc btree records */
+	uint			m_alloc_mnr[2];	/* min alloc btree records */
+	uint			m_bmap_dmxr[2];	/* max bmap btree records */
+	uint			m_bmap_dmnr[2];	/* min bmap btree records */
+	uint			m_inobt_mxr[2];	/* max inobt btree records */
+	uint			m_inobt_mnr[2];	/* min inobt btree records */
+	uint			m_rmap_mxr[2];	/* max rmap btree records */
+	uint			m_rmap_mnr[2];	/* min rmap btree records */
+	uint			m_refc_mxr[2];	/* max refc btree records */
+	uint			m_refc_mnr[2];	/* min refc btree records */
+	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
+	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
+	uint			m_in_maxlevels;	/* max inobt btree levels. */
+	uint			m_rmap_maxlevels; /* max rmap btree levels */
+	uint			m_refc_maxlevels; /* max refcount btree level */
+	xfs_extlen_t		m_ag_prealloc_blocks; /* reserved ag blocks */
+	uint			m_alloc_set_aside; /* space we can't use */
+	uint			m_ag_max_usable; /* max space per AG */
+	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
+	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
+	struct mutex		m_growlock;	/* growfs mutex */
+	int			m_fixedfsid[2];	/* unchanged for life of FS */
+	uint64_t		m_flags;	/* global mount flags */
+	bool			m_finobt_nores; /* no per-AG finobt resv. */
+	int			m_ialloc_inos;	/* inodes in inode allocation */
+	int			m_ialloc_blks;	/* blocks in inode allocation */
+	int			m_ialloc_min_blks;/* min blocks in sparse inode
+						   * allocation */
+	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
+	uint			m_qflags;	/* quota status flags */
+	struct xfs_trans_resv	m_resv;		/* precomputed res values */
+	uint64_t		m_maxicount;	/* maximum inode count */
+	uint64_t		m_resblks;	/* total reserved blocks */
+	uint64_t		m_resblks_avail;/* available reserved blocks */
+	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
+	int			m_dalign;	/* stripe unit */
+	int			m_swidth;	/* stripe width */
+	int			m_sinoalign;	/* stripe unit inode alignment */
+	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
+	const struct xfs_nameops *m_dirnameops;	/* vector of dir name ops */
+	const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
+	const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
+	uint			m_chsize;	/* size of next field */
+	atomic_t		m_active_trans;	/* number trans frozen */
+	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
+	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
+	struct delayed_work	m_eofblocks_work; /* background eof blocks
+						     trimming */
+	struct delayed_work	m_cowblocks_work; /* background cow blocks
+						     trimming */
+	bool			m_update_sb;	/* sb needs update in mount */
+	int64_t			m_low_space[XFS_LOWSP_MAX];
+						/* low free space thresholds */
+	struct xfs_kobj		m_kobj;
+	struct xfs_kobj		m_error_kobj;
+	struct xfs_kobj		m_error_meta_kobj;
+	struct xfs_error_cfg	m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
+	struct xstats		m_stats;	/* per-fs stats */
+
+	struct workqueue_struct *m_buf_workqueue;
+	struct workqueue_struct	*m_data_workqueue;
+	struct workqueue_struct	*m_unwritten_workqueue;
+	struct workqueue_struct	*m_cil_workqueue;
+	struct workqueue_struct	*m_reclaim_workqueue;
+	struct workqueue_struct	*m_log_workqueue;
+	struct workqueue_struct *m_eofblocks_workqueue;
+	struct workqueue_struct	*m_sync_workqueue;
+
+	/*
+	 * Generation of the filesysyem layout.  This is incremented by each
+	 * growfs, and used by the pNFS server to ensure the client updates
+	 * its view of the block device once it gets a layout that might
+	 * reference the newly added blocks.  Does not need to be persistent
+	 * as long as we only allow file system size increments, but if we
+	 * ever support shrinks it would have to be persisted in addition
+	 * to various other kinds of pain inflicted on the pNFS server.
+	 */
+	uint32_t		m_generation;
+
+	bool			m_fail_unmount;
+#ifdef DEBUG
+	/*
+	 * Frequency with which errors are injected.  Replaces xfs_etest; the
+	 * value stored in here is the inverse of the frequency with which the
+	 * error triggers.  1 = always, 2 = half the time, etc.
+	 */
+	unsigned int		*m_errortag;
+	struct xfs_kobj		m_errortag_kobj;
+#endif
+} xfs_mount_t;
+
+/*
+ * Flags for m_flags.
+ */
+#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
+						   must be synchronous except
+						   for space allocations */
+#define XFS_MOUNT_UNMOUNTING	(1ULL << 1)	/* filesystem is unmounting */
+#define XFS_MOUNT_BAD_SUMMARY	(1ULL << 2)	/* summary counters are bad */
+#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
+#define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
+						   operations, typically for
+						   disk errors in metadata */
+#define XFS_MOUNT_DISCARD	(1ULL << 5)	/* discard unused blocks */
+#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
+						   allocations */
+#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
+#define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
+#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
+#define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
+#define XFS_MOUNT_SMALL_INUMS	(1ULL << 14)	/* user wants 32bit inodes */
+#define XFS_MOUNT_32BITINODES	(1ULL << 15)	/* inode32 allocator active */
+#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
+#define XFS_MOUNT_IKEEP		(1ULL << 18)	/* keep empty inode clusters*/
+#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
+						 * allocation */
+#define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
+#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
+#define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
+						 * I/O size in stat() */
+#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
+						   allocator */
+#define XFS_MOUNT_NOATTR2	(1ULL << 25)	/* disable use of attr2 format */
+
+#define XFS_MOUNT_DAX		(1ULL << 62)	/* TEST ONLY! */
+
+
+/*
+ * Default minimum read and write sizes.
+ */
+#define XFS_READIO_LOG_LARGE	16
+#define XFS_WRITEIO_LOG_LARGE	16
+
+/*
+ * Max and min values for mount-option defined I/O
+ * preallocation sizes.
+ */
+#define XFS_MAX_IO_LOG		30	/* 1G */
+#define XFS_MIN_IO_LOG		PAGE_SHIFT
+
+/*
+ * Synchronous read and write sizes.  This should be
+ * better for NFSv2 wsync filesystems.
+ */
+#define	XFS_WSYNC_READIO_LOG	15	/* 32k */
+#define	XFS_WSYNC_WRITEIO_LOG	14	/* 16k */
+
+/*
+ * Allow large block sizes to be reported to userspace programs if the
+ * "largeio" mount option is used.
+ *
+ * If compatibility mode is specified, simply return the basic unit of caching
+ * so that we don't get inefficient read/modify/write I/O from user apps.
+ * Otherwise....
+ *
+ * If the underlying volume is a stripe, then return the stripe width in bytes
+ * as the recommended I/O size. It is not a stripe and we've set a default
+ * buffered I/O size, return that, otherwise return the compat default.
+ */
+static inline unsigned long
+xfs_preferred_iosize(xfs_mount_t *mp)
+{
+	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
+		return PAGE_SIZE;
+	return (mp->m_swidth ?
+		(mp->m_swidth << mp->m_sb.sb_blocklog) :
+		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
+			(1 << (int)max(mp->m_readio_log, mp->m_writeio_log)) :
+			PAGE_SIZE));
+}
+
+#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
+				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
+#define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
+void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
+		int lnnum);
+#define xfs_force_shutdown(m,f)	\
+	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
+
+#define SHUTDOWN_META_IO_ERROR	0x0001	/* write attempt to metadata failed */
+#define SHUTDOWN_LOG_IO_ERROR	0x0002	/* write attempt to the log failed */
+#define SHUTDOWN_FORCE_UMOUNT	0x0004	/* shutdown from a forced unmount */
+#define SHUTDOWN_CORRUPT_INCORE	0x0008	/* corrupt in-memory data structures */
+#define SHUTDOWN_REMOTE_REQ	0x0010	/* shutdown came from remote cell */
+#define SHUTDOWN_DEVICE_REQ	0x0020	/* failed all paths to the device */
+
+/*
+ * Flags for xfs_mountfs
+ */
+#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */
+
+static inline xfs_agnumber_t
+xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
+{
+	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
+	do_div(ld, mp->m_sb.sb_agblocks);
+	return (xfs_agnumber_t) ld;
+}
+
+static inline xfs_agblock_t
+xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
+{
+	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
+	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
+}
+
+/* per-AG block reservation data structures*/
+enum xfs_ag_resv_type {
+	XFS_AG_RESV_NONE = 0,
+	XFS_AG_RESV_AGFL,
+	XFS_AG_RESV_METADATA,
+	XFS_AG_RESV_RMAPBT,
+};
+
+struct xfs_ag_resv {
+	/* number of blocks originally reserved here */
+	xfs_extlen_t			ar_orig_reserved;
+	/* number of blocks reserved here */
+	xfs_extlen_t			ar_reserved;
+	/* number of blocks originally asked for */
+	xfs_extlen_t			ar_asked;
+};
+
+/*
+ * Per-ag incore structure, copies of information in agf and agi, to improve the
+ * performance of allocation group selection.
+ */
+typedef struct xfs_perag {
+	struct xfs_mount *pag_mount;	/* owner filesystem */
+	xfs_agnumber_t	pag_agno;	/* AG this structure belongs to */
+	atomic_t	pag_ref;	/* perag reference count */
+	char		pagf_init;	/* this agf's entry is initialized */
+	char		pagi_init;	/* this agi's entry is initialized */
+	char		pagf_metadata;	/* the agf is preferred to be metadata */
+	char		pagi_inodeok;	/* The agi is ok for inodes */
+	uint8_t		pagf_levels[XFS_BTNUM_AGF];
+					/* # of levels in bno & cnt btree */
+	bool		pagf_agflreset; /* agfl requires reset before use */
+	uint32_t	pagf_flcount;	/* count of blocks in freelist */
+	xfs_extlen_t	pagf_freeblks;	/* total free blocks */
+	xfs_extlen_t	pagf_longest;	/* longest free space */
+	uint32_t	pagf_btreeblks;	/* # of blocks held in AGF btrees */
+	xfs_agino_t	pagi_freecount;	/* number of free inodes */
+	xfs_agino_t	pagi_count;	/* number of allocated inodes */
+
+	/*
+	 * Inode allocation search lookup optimisation.
+	 * If the pagino matches, the search for new inodes
+	 * doesn't need to search the near ones again straight away
+	 */
+	xfs_agino_t	pagl_pagino;
+	xfs_agino_t	pagl_leftrec;
+	xfs_agino_t	pagl_rightrec;
+	spinlock_t	pagb_lock;	/* lock for pagb_tree */
+	struct rb_root	pagb_tree;	/* ordered tree of busy extents */
+	unsigned int	pagb_gen;	/* generation count for pagb_tree */
+	wait_queue_head_t pagb_wait;	/* woken when pagb_gen changes */
+
+	atomic_t        pagf_fstrms;    /* # of filestreams active in this AG */
+
+	spinlock_t	pag_ici_lock;	/* incore inode cache lock */
+	struct radix_tree_root pag_ici_root;	/* incore inode cache root */
+	int		pag_ici_reclaimable;	/* reclaimable inodes */
+	struct mutex	pag_ici_reclaim_lock;	/* serialisation point */
+	unsigned long	pag_ici_reclaim_cursor;	/* reclaim restart point */
+
+	/* buffer cache index */
+	spinlock_t	pag_buf_lock;	/* lock for pag_buf_hash */
+	struct rhashtable pag_buf_hash;
+
+	/* for rcu-safe freeing */
+	struct rcu_head	rcu_head;
+	int		pagb_count;	/* pagb slots in use */
+
+	/* Blocks reserved for all kinds of metadata. */
+	struct xfs_ag_resv	pag_meta_resv;
+	/* Blocks reserved for the reverse mapping btree. */
+	struct xfs_ag_resv	pag_rmapbt_resv;
+
+	/* reference count */
+	uint8_t			pagf_refcount_level;
+} xfs_perag_t;
+
+static inline struct xfs_ag_resv *
+xfs_perag_resv(
+	struct xfs_perag	*pag,
+	enum xfs_ag_resv_type	type)
+{
+	switch (type) {
+	case XFS_AG_RESV_METADATA:
+		return &pag->pag_meta_resv;
+	case XFS_AG_RESV_RMAPBT:
+		return &pag->pag_rmapbt_resv;
+	default:
+		return NULL;
+	}
+}
+
+int xfs_buf_hash_init(xfs_perag_t *pag);
+void xfs_buf_hash_destroy(xfs_perag_t *pag);
+
+extern void	xfs_uuid_table_free(void);
+extern int	xfs_log_sbcount(xfs_mount_t *);
+extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
+extern int	xfs_mountfs(xfs_mount_t *mp);
+extern int	xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
+				     xfs_agnumber_t *maxagi);
+extern void	xfs_unmountfs(xfs_mount_t *);
+
+extern int	xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
+extern int	xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
+extern int	xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
+				 bool reserved);
+extern int	xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
+
+extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
+extern int	xfs_readsb(xfs_mount_t *, int);
+extern void	xfs_freesb(xfs_mount_t *);
+extern bool	xfs_fs_writable(struct xfs_mount *mp, int level);
+extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
+
+extern int	xfs_dev_is_read_only(struct xfs_mount *, char *);
+
+extern void	xfs_set_low_space_thresholds(struct xfs_mount *);
+
+int	xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
+			xfs_off_t count_fsb);
+
+struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
+		int error_class, int error);
+void xfs_force_summary_recalc(struct xfs_mount *mp);
+
+#endif	/* __XFS_MOUNT_H__ */