1119 lines
34 KiB
C
1119 lines
34 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FS_CEPH_SUPER_H
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#define _FS_CEPH_SUPER_H
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#include <linux/ceph/ceph_debug.h>
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#include <asm/unaligned.h>
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#include <linux/backing-dev.h>
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#include <linux/completion.h>
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#include <linux/exportfs.h>
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#include <linux/fs.h>
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#include <linux/mempool.h>
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#include <linux/pagemap.h>
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#include <linux/wait.h>
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#include <linux/writeback.h>
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#include <linux/slab.h>
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#include <linux/posix_acl.h>
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#include <linux/refcount.h>
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#include <linux/ceph/libceph.h>
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#ifdef CONFIG_CEPH_FSCACHE
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#include <linux/fscache.h>
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#endif
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/* f_type in struct statfs */
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#define CEPH_SUPER_MAGIC 0x00c36400
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/* large granularity for statfs utilization stats to facilitate
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* large volume sizes on 32-bit machines. */
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#define CEPH_BLOCK_SHIFT 22 /* 4 MB */
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#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
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#define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
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#define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
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#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
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#define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
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#define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
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#define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
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#define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
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#define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
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#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
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#define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE
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#define ceph_set_mount_opt(fsc, opt) \
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(fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
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#define ceph_test_mount_opt(fsc, opt) \
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(!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
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/* max size of osd read request, limited by libceph */
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#define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
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/* osd has a configurable limitaion of max write size.
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* CEPH_MSG_MAX_DATA_LEN should be small enough. */
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#define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
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#define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
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#define CEPH_MAX_READDIR_DEFAULT 1024
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#define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
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#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
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/*
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* Delay telling the MDS we no longer want caps, in case we reopen
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* the file. Delay a minimum amount of time, even if we send a cap
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* message for some other reason. Otherwise, take the oppotunity to
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* update the mds to avoid sending another message later.
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*/
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#define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
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#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
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struct ceph_mount_options {
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int flags;
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int sb_flags;
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int wsize; /* max write size */
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int rsize; /* max read size */
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int rasize; /* max readahead */
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int congestion_kb; /* max writeback in flight */
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int caps_wanted_delay_min, caps_wanted_delay_max;
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int max_readdir; /* max readdir result (entires) */
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int max_readdir_bytes; /* max readdir result (bytes) */
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/*
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* everything above this point can be memcmp'd; everything below
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* is handled in compare_mount_options()
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*/
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char *snapdir_name; /* default ".snap" */
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char *mds_namespace; /* default NULL */
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char *server_path; /* default NULL (means "/") */
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char *fscache_uniq; /* default NULL */
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};
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struct ceph_fs_client {
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struct super_block *sb;
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struct ceph_mount_options *mount_options;
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struct ceph_client *client;
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unsigned long mount_state;
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int min_caps; /* min caps i added */
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loff_t max_file_size;
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struct ceph_mds_client *mdsc;
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/* writeback */
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mempool_t *wb_pagevec_pool;
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struct workqueue_struct *wb_wq;
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struct workqueue_struct *pg_inv_wq;
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struct workqueue_struct *trunc_wq;
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atomic_long_t writeback_count;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_dentry_lru, *debugfs_caps;
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struct dentry *debugfs_congestion_kb;
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struct dentry *debugfs_bdi;
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struct dentry *debugfs_mdsc, *debugfs_mdsmap;
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struct dentry *debugfs_mds_sessions;
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#endif
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#ifdef CONFIG_CEPH_FSCACHE
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struct fscache_cookie *fscache;
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#endif
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};
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/*
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* File i/o capability. This tracks shared state with the metadata
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* server that allows us to cache or writeback attributes or to read
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* and write data. For any given inode, we should have one or more
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* capabilities, one issued by each metadata server, and our
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* cumulative access is the OR of all issued capabilities.
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*
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* Each cap is referenced by the inode's i_caps rbtree and by per-mds
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* session capability lists.
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*/
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struct ceph_cap {
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struct ceph_inode_info *ci;
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struct rb_node ci_node; /* per-ci cap tree */
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struct ceph_mds_session *session;
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struct list_head session_caps; /* per-session caplist */
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u64 cap_id; /* unique cap id (mds provided) */
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union {
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/* in-use caps */
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struct {
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int issued; /* latest, from the mds */
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int implemented; /* implemented superset of
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issued (for revocation) */
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int mds, mds_wanted;
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};
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/* caps to release */
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struct {
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u64 cap_ino;
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int queue_release;
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};
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};
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u32 seq, issue_seq, mseq;
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u32 cap_gen; /* active/stale cycle */
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unsigned long last_used;
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struct list_head caps_item;
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};
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#define CHECK_CAPS_NODELAY 1 /* do not delay any further */
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#define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
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#define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
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struct ceph_cap_flush {
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u64 tid;
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int caps; /* 0 means capsnap */
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bool wake; /* wake up flush waiters when finish ? */
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struct list_head g_list; // global
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struct list_head i_list; // per inode
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};
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/*
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* Snapped cap state that is pending flush to mds. When a snapshot occurs,
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* we first complete any in-process sync writes and writeback any dirty
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* data before flushing the snapped state (tracked here) back to the MDS.
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*/
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struct ceph_cap_snap {
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refcount_t nref;
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struct list_head ci_item;
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struct ceph_cap_flush cap_flush;
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u64 follows;
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int issued, dirty;
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struct ceph_snap_context *context;
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umode_t mode;
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kuid_t uid;
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kgid_t gid;
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struct ceph_buffer *xattr_blob;
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u64 xattr_version;
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u64 size;
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struct timespec64 mtime, atime, ctime;
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u64 time_warp_seq;
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u64 truncate_size;
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u32 truncate_seq;
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int writing; /* a sync write is still in progress */
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int dirty_pages; /* dirty pages awaiting writeback */
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bool inline_data;
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bool need_flush;
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};
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static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
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{
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if (refcount_dec_and_test(&capsnap->nref)) {
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if (capsnap->xattr_blob)
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ceph_buffer_put(capsnap->xattr_blob);
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kfree(capsnap);
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}
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}
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/*
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* The frag tree describes how a directory is fragmented, potentially across
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* multiple metadata servers. It is also used to indicate points where
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* metadata authority is delegated, and whether/where metadata is replicated.
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*
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* A _leaf_ frag will be present in the i_fragtree IFF there is
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* delegation info. That is, if mds >= 0 || ndist > 0.
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*/
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#define CEPH_MAX_DIRFRAG_REP 4
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struct ceph_inode_frag {
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struct rb_node node;
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/* fragtree state */
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u32 frag;
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int split_by; /* i.e. 2^(split_by) children */
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/* delegation and replication info */
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int mds; /* -1 if same authority as parent */
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int ndist; /* >0 if replicated */
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int dist[CEPH_MAX_DIRFRAG_REP];
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};
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/*
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* We cache inode xattrs as an encoded blob until they are first used,
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* at which point we parse them into an rbtree.
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*/
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struct ceph_inode_xattr {
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struct rb_node node;
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const char *name;
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int name_len;
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const char *val;
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int val_len;
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int dirty;
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int should_free_name;
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int should_free_val;
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};
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/*
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* Ceph dentry state
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*/
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struct ceph_dentry_info {
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struct ceph_mds_session *lease_session;
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int lease_shared_gen;
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u32 lease_gen;
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u32 lease_seq;
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unsigned long lease_renew_after, lease_renew_from;
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struct list_head lru;
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struct dentry *dentry;
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unsigned long time;
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u64 offset;
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};
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struct ceph_inode_xattrs_info {
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/*
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* (still encoded) xattr blob. we avoid the overhead of parsing
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* this until someone actually calls getxattr, etc.
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*
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* blob->vec.iov_len == 4 implies there are no xattrs; blob ==
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* NULL means we don't know.
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*/
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struct ceph_buffer *blob, *prealloc_blob;
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struct rb_root index;
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bool dirty;
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int count;
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int names_size;
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int vals_size;
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u64 version, index_version;
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};
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/*
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* Ceph inode.
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*/
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struct ceph_inode_info {
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struct ceph_vino i_vino; /* ceph ino + snap */
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spinlock_t i_ceph_lock;
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u64 i_version;
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u64 i_inline_version;
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u32 i_time_warp_seq;
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unsigned i_ceph_flags;
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atomic64_t i_release_count;
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atomic64_t i_ordered_count;
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atomic64_t i_complete_seq[2];
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struct ceph_dir_layout i_dir_layout;
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struct ceph_file_layout i_layout;
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char *i_symlink;
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/* for dirs */
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struct timespec64 i_rctime;
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u64 i_rbytes, i_rfiles, i_rsubdirs;
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u64 i_files, i_subdirs;
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/* quotas */
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u64 i_max_bytes, i_max_files;
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struct rb_root i_fragtree;
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int i_fragtree_nsplits;
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struct mutex i_fragtree_mutex;
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struct ceph_inode_xattrs_info i_xattrs;
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/* capabilities. protected _both_ by i_ceph_lock and cap->session's
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* s_mutex. */
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struct rb_root i_caps; /* cap list */
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struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
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unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
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struct list_head i_dirty_item, i_flushing_item;
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/* we need to track cap writeback on a per-cap-bit basis, to allow
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* overlapping, pipelined cap flushes to the mds. we can probably
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* reduce the tid to 8 bits if we're concerned about inode size. */
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struct ceph_cap_flush *i_prealloc_cap_flush;
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struct list_head i_cap_flush_list;
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wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
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unsigned long i_hold_caps_min; /* jiffies */
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unsigned long i_hold_caps_max; /* jiffies */
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struct list_head i_cap_delay_list; /* for delayed cap release to mds */
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struct ceph_cap_reservation i_cap_migration_resv;
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struct list_head i_cap_snaps; /* snapped state pending flush to mds */
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struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
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dirty|flushing caps */
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unsigned i_snap_caps; /* cap bits for snapped files */
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int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
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struct mutex i_truncate_mutex;
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u32 i_truncate_seq; /* last truncate to smaller size */
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u64 i_truncate_size; /* and the size we last truncated down to */
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int i_truncate_pending; /* still need to call vmtruncate */
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u64 i_max_size; /* max file size authorized by mds */
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u64 i_reported_size; /* (max_)size reported to or requested of mds */
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u64 i_wanted_max_size; /* offset we'd like to write too */
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u64 i_requested_max_size; /* max_size we've requested */
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/* held references to caps */
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int i_pin_ref;
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int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
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int i_wrbuffer_ref, i_wrbuffer_ref_head;
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atomic_t i_filelock_ref;
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atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */
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u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
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u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
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struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
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struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
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spinlock_t i_unsafe_lock;
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struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
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int i_snap_realm_counter; /* snap realm (if caps) */
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struct list_head i_snap_realm_item;
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struct list_head i_snap_flush_item;
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struct work_struct i_wb_work; /* writeback work */
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struct work_struct i_pg_inv_work; /* page invalidation work */
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struct work_struct i_vmtruncate_work;
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#ifdef CONFIG_CEPH_FSCACHE
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struct fscache_cookie *fscache;
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u32 i_fscache_gen;
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#endif
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struct inode vfs_inode; /* at end */
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};
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static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
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{
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return container_of(inode, struct ceph_inode_info, vfs_inode);
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}
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static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
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{
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return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
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}
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static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
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{
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return (struct ceph_fs_client *)sb->s_fs_info;
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}
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static inline struct ceph_vino ceph_vino(struct inode *inode)
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{
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return ceph_inode(inode)->i_vino;
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}
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/*
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* ino_t is <64 bits on many architectures, blech.
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*
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* i_ino (kernel inode) st_ino (userspace)
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* i386 32 32
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* x86_64+ino32 64 32
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* x86_64 64 64
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*/
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static inline u32 ceph_ino_to_ino32(__u64 vino)
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{
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u32 ino = vino & 0xffffffff;
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ino ^= vino >> 32;
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if (!ino)
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ino = 2;
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return ino;
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}
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/*
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* kernel i_ino value
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*/
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static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
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{
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#if BITS_PER_LONG == 32
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return ceph_ino_to_ino32(vino.ino);
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#else
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return (ino_t)vino.ino;
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#endif
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}
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/*
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* user-visible ino (stat, filldir)
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*/
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#if BITS_PER_LONG == 32
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static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
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{
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return ino;
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}
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#else
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static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
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{
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if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
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ino = ceph_ino_to_ino32(ino);
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return ino;
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}
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#endif
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/* for printf-style formatting */
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#define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
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static inline u64 ceph_ino(struct inode *inode)
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{
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return ceph_inode(inode)->i_vino.ino;
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}
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static inline u64 ceph_snap(struct inode *inode)
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{
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return ceph_inode(inode)->i_vino.snap;
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}
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static inline int ceph_ino_compare(struct inode *inode, void *data)
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{
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struct ceph_vino *pvino = (struct ceph_vino *)data;
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struct ceph_inode_info *ci = ceph_inode(inode);
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return ci->i_vino.ino == pvino->ino &&
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ci->i_vino.snap == pvino->snap;
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}
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static inline struct inode *ceph_find_inode(struct super_block *sb,
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struct ceph_vino vino)
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{
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ino_t t = ceph_vino_to_ino(vino);
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return ilookup5(sb, t, ceph_ino_compare, &vino);
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}
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/*
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* Ceph inode.
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*/
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#define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
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#define CEPH_I_NODELAY (1 << 1) /* do not delay cap release */
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#define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
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#define CEPH_I_NOFLUSH (1 << 3) /* do not flush dirty caps */
|
|
#define CEPH_I_POOL_PERM (1 << 4) /* pool rd/wr bits are valid */
|
|
#define CEPH_I_POOL_RD (1 << 5) /* can read from pool */
|
|
#define CEPH_I_POOL_WR (1 << 6) /* can write to pool */
|
|
#define CEPH_I_SEC_INITED (1 << 7) /* security initialized */
|
|
#define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
|
|
#define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
|
|
#define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
|
|
#define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
|
|
#define CEPH_I_ERROR_FILELOCK (1 << 12) /* have seen file lock errors */
|
|
|
|
|
|
/*
|
|
* We set the ERROR_WRITE bit when we start seeing write errors on an inode
|
|
* and then clear it when they start succeeding. Note that we do a lockless
|
|
* check first, and only take the lock if it looks like it needs to be changed.
|
|
* The write submission code just takes this as a hint, so we're not too
|
|
* worried if a few slip through in either direction.
|
|
*/
|
|
static inline void ceph_set_error_write(struct ceph_inode_info *ci)
|
|
{
|
|
if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
|
|
spin_lock(&ci->i_ceph_lock);
|
|
ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
}
|
|
}
|
|
|
|
static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
|
|
{
|
|
if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
|
|
spin_lock(&ci->i_ceph_lock);
|
|
ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
}
|
|
}
|
|
|
|
static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
|
|
long long release_count,
|
|
long long ordered_count)
|
|
{
|
|
/*
|
|
* Makes sure operations that setup readdir cache (update page
|
|
* cache and i_size) are strongly ordered w.r.t. the following
|
|
* atomic64_set() operations.
|
|
*/
|
|
smp_mb();
|
|
atomic64_set(&ci->i_complete_seq[0], release_count);
|
|
atomic64_set(&ci->i_complete_seq[1], ordered_count);
|
|
}
|
|
|
|
static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
|
|
{
|
|
atomic64_inc(&ci->i_release_count);
|
|
}
|
|
|
|
static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
|
|
{
|
|
atomic64_inc(&ci->i_ordered_count);
|
|
}
|
|
|
|
static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
|
|
{
|
|
return atomic64_read(&ci->i_complete_seq[0]) ==
|
|
atomic64_read(&ci->i_release_count);
|
|
}
|
|
|
|
static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
|
|
{
|
|
return atomic64_read(&ci->i_complete_seq[0]) ==
|
|
atomic64_read(&ci->i_release_count) &&
|
|
atomic64_read(&ci->i_complete_seq[1]) ==
|
|
atomic64_read(&ci->i_ordered_count);
|
|
}
|
|
|
|
static inline void ceph_dir_clear_complete(struct inode *inode)
|
|
{
|
|
__ceph_dir_clear_complete(ceph_inode(inode));
|
|
}
|
|
|
|
static inline void ceph_dir_clear_ordered(struct inode *inode)
|
|
{
|
|
__ceph_dir_clear_ordered(ceph_inode(inode));
|
|
}
|
|
|
|
static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
|
|
{
|
|
bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
|
|
smp_rmb();
|
|
return ret;
|
|
}
|
|
|
|
/* find a specific frag @f */
|
|
extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
|
|
u32 f);
|
|
|
|
/*
|
|
* choose fragment for value @v. copy frag content to pfrag, if leaf
|
|
* exists
|
|
*/
|
|
extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
|
|
struct ceph_inode_frag *pfrag,
|
|
int *found);
|
|
|
|
static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
|
|
{
|
|
return (struct ceph_dentry_info *)dentry->d_fsdata;
|
|
}
|
|
|
|
/*
|
|
* caps helpers
|
|
*/
|
|
static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
|
|
{
|
|
return !RB_EMPTY_ROOT(&ci->i_caps);
|
|
}
|
|
|
|
extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
|
|
extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
|
|
extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
|
|
struct ceph_cap *cap);
|
|
|
|
static inline int ceph_caps_issued(struct ceph_inode_info *ci)
|
|
{
|
|
int issued;
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return issued;
|
|
}
|
|
|
|
static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
|
|
int touch)
|
|
{
|
|
int r;
|
|
spin_lock(&ci->i_ceph_lock);
|
|
r = __ceph_caps_issued_mask(ci, mask, touch);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return r;
|
|
}
|
|
|
|
static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
|
|
{
|
|
return ci->i_dirty_caps | ci->i_flushing_caps;
|
|
}
|
|
extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
|
|
extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
|
|
extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
|
|
struct ceph_cap_flush **pcf);
|
|
|
|
extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
|
|
struct ceph_cap *ocap, int mask);
|
|
extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
|
|
extern int __ceph_caps_used(struct ceph_inode_info *ci);
|
|
|
|
extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
|
|
|
|
/*
|
|
* wanted, by virtue of open file modes AND cap refs (buffered/cached data)
|
|
*/
|
|
static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
|
|
{
|
|
int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
|
|
if (w & CEPH_CAP_FILE_BUFFER)
|
|
w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
|
|
return w;
|
|
}
|
|
|
|
/* what the mds thinks we want */
|
|
extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
|
|
|
|
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 void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_cap_reservation *ctx);
|
|
extern void ceph_reservation_status(struct ceph_fs_client *client,
|
|
int *total, int *avail, int *used,
|
|
int *reserved, int *min);
|
|
|
|
|
|
|
|
/*
|
|
* we keep buffered readdir results attached to file->private_data
|
|
*/
|
|
#define CEPH_F_SYNC 1
|
|
#define CEPH_F_ATEND 2
|
|
|
|
struct ceph_file_info {
|
|
short fmode; /* initialized on open */
|
|
short flags; /* CEPH_F_* */
|
|
|
|
spinlock_t rw_contexts_lock;
|
|
struct list_head rw_contexts;
|
|
};
|
|
|
|
struct ceph_dir_file_info {
|
|
struct ceph_file_info file_info;
|
|
|
|
/* readdir: position within the dir */
|
|
u32 frag;
|
|
struct ceph_mds_request *last_readdir;
|
|
|
|
/* readdir: position within a frag */
|
|
unsigned next_offset; /* offset of next chunk (last_name's + 1) */
|
|
char *last_name; /* last entry in previous chunk */
|
|
long long dir_release_count;
|
|
long long dir_ordered_count;
|
|
int readdir_cache_idx;
|
|
|
|
/* used for -o dirstat read() on directory thing */
|
|
char *dir_info;
|
|
int dir_info_len;
|
|
};
|
|
|
|
struct ceph_rw_context {
|
|
struct list_head list;
|
|
struct task_struct *thread;
|
|
int caps;
|
|
};
|
|
|
|
#define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
|
|
struct ceph_rw_context _name = { \
|
|
.thread = current, \
|
|
.caps = _caps, \
|
|
}
|
|
|
|
static inline void ceph_add_rw_context(struct ceph_file_info *cf,
|
|
struct ceph_rw_context *ctx)
|
|
{
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_add(&ctx->list, &cf->rw_contexts);
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
}
|
|
|
|
static inline void ceph_del_rw_context(struct ceph_file_info *cf,
|
|
struct ceph_rw_context *ctx)
|
|
{
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_del(&ctx->list);
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
}
|
|
|
|
static inline struct ceph_rw_context*
|
|
ceph_find_rw_context(struct ceph_file_info *cf)
|
|
{
|
|
struct ceph_rw_context *ctx, *found = NULL;
|
|
spin_lock(&cf->rw_contexts_lock);
|
|
list_for_each_entry(ctx, &cf->rw_contexts, list) {
|
|
if (ctx->thread == current) {
|
|
found = ctx;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&cf->rw_contexts_lock);
|
|
return found;
|
|
}
|
|
|
|
struct ceph_readdir_cache_control {
|
|
struct page *page;
|
|
struct dentry **dentries;
|
|
int index;
|
|
};
|
|
|
|
/*
|
|
* A "snap realm" describes a subset of the file hierarchy sharing
|
|
* the same set of snapshots that apply to it. The realms themselves
|
|
* are organized into a hierarchy, such that children inherit (some of)
|
|
* the snapshots of their parents.
|
|
*
|
|
* All inodes within the realm that have capabilities are linked into a
|
|
* per-realm list.
|
|
*/
|
|
struct ceph_snap_realm {
|
|
u64 ino;
|
|
struct inode *inode;
|
|
atomic_t nref;
|
|
struct rb_node node;
|
|
|
|
u64 created, seq;
|
|
u64 parent_ino;
|
|
u64 parent_since; /* snapid when our current parent became so */
|
|
|
|
u64 *prior_parent_snaps; /* snaps inherited from any parents we */
|
|
u32 num_prior_parent_snaps; /* had prior to parent_since */
|
|
u64 *snaps; /* snaps specific to this realm */
|
|
u32 num_snaps;
|
|
|
|
struct ceph_snap_realm *parent;
|
|
struct list_head children; /* list of child realms */
|
|
struct list_head child_item;
|
|
|
|
struct list_head empty_item; /* if i have ref==0 */
|
|
|
|
struct list_head dirty_item; /* if realm needs new context */
|
|
|
|
/* the current set of snaps for this realm */
|
|
struct ceph_snap_context *cached_context;
|
|
|
|
struct list_head inodes_with_caps;
|
|
spinlock_t inodes_with_caps_lock;
|
|
};
|
|
|
|
static inline int default_congestion_kb(void)
|
|
{
|
|
int congestion_kb;
|
|
|
|
/*
|
|
* Copied from NFS
|
|
*
|
|
* congestion size, scale with available memory.
|
|
*
|
|
* 64MB: 8192k
|
|
* 128MB: 11585k
|
|
* 256MB: 16384k
|
|
* 512MB: 23170k
|
|
* 1GB: 32768k
|
|
* 2GB: 46340k
|
|
* 4GB: 65536k
|
|
* 8GB: 92681k
|
|
* 16GB: 131072k
|
|
*
|
|
* This allows larger machines to have larger/more transfers.
|
|
* Limit the default to 256M
|
|
*/
|
|
congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
|
|
if (congestion_kb > 256*1024)
|
|
congestion_kb = 256*1024;
|
|
|
|
return congestion_kb;
|
|
}
|
|
|
|
|
|
|
|
/* snap.c */
|
|
struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
|
|
u64 ino);
|
|
extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
|
|
struct ceph_snap_realm *realm);
|
|
extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
|
|
struct ceph_snap_realm *realm);
|
|
extern int ceph_update_snap_trace(struct ceph_mds_client *m,
|
|
void *p, void *e, bool deletion,
|
|
struct ceph_snap_realm **realm_ret);
|
|
extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session,
|
|
struct ceph_msg *msg);
|
|
extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
|
|
extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
|
|
struct ceph_cap_snap *capsnap);
|
|
extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
|
|
|
|
/*
|
|
* a cap_snap is "pending" if it is still awaiting an in-progress
|
|
* sync write (that may/may not still update size, mtime, etc.).
|
|
*/
|
|
static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
|
|
{
|
|
return !list_empty(&ci->i_cap_snaps) &&
|
|
list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
|
|
ci_item)->writing;
|
|
}
|
|
|
|
/* inode.c */
|
|
extern const struct inode_operations ceph_file_iops;
|
|
|
|
extern struct inode *ceph_alloc_inode(struct super_block *sb);
|
|
extern void ceph_evict_inode(struct inode *inode);
|
|
extern void ceph_destroy_inode(struct inode *inode);
|
|
extern int ceph_drop_inode(struct inode *inode);
|
|
|
|
extern struct inode *ceph_get_inode(struct super_block *sb,
|
|
struct ceph_vino vino);
|
|
extern struct inode *ceph_get_snapdir(struct inode *parent);
|
|
extern int ceph_fill_file_size(struct inode *inode, int issued,
|
|
u32 truncate_seq, u64 truncate_size, u64 size);
|
|
extern void ceph_fill_file_time(struct inode *inode, int issued,
|
|
u64 time_warp_seq, struct timespec64 *ctime,
|
|
struct timespec64 *mtime,
|
|
struct timespec64 *atime);
|
|
extern int ceph_fill_trace(struct super_block *sb,
|
|
struct ceph_mds_request *req);
|
|
extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session);
|
|
|
|
extern int ceph_inode_holds_cap(struct inode *inode, int mask);
|
|
|
|
extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
|
|
extern void __ceph_do_pending_vmtruncate(struct inode *inode);
|
|
extern void ceph_queue_vmtruncate(struct inode *inode);
|
|
|
|
extern void ceph_queue_invalidate(struct inode *inode);
|
|
extern void ceph_queue_writeback(struct inode *inode);
|
|
|
|
extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
|
|
int mask, bool force);
|
|
static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
|
|
{
|
|
return __ceph_do_getattr(inode, NULL, mask, force);
|
|
}
|
|
extern int ceph_permission(struct inode *inode, int mask);
|
|
extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
|
|
extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
|
|
extern int ceph_getattr(const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags);
|
|
|
|
/* xattr.c */
|
|
int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
|
|
ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
|
|
extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
|
|
extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
|
|
extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
|
|
extern void __init ceph_xattr_init(void);
|
|
extern void ceph_xattr_exit(void);
|
|
extern const struct xattr_handler *ceph_xattr_handlers[];
|
|
|
|
#ifdef CONFIG_SECURITY
|
|
extern bool ceph_security_xattr_deadlock(struct inode *in);
|
|
extern bool ceph_security_xattr_wanted(struct inode *in);
|
|
#else
|
|
static inline bool ceph_security_xattr_deadlock(struct inode *in)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool ceph_security_xattr_wanted(struct inode *in)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
/* acl.c */
|
|
struct ceph_acls_info {
|
|
void *default_acl;
|
|
void *acl;
|
|
struct ceph_pagelist *pagelist;
|
|
};
|
|
|
|
#ifdef CONFIG_CEPH_FS_POSIX_ACL
|
|
|
|
struct posix_acl *ceph_get_acl(struct inode *, int);
|
|
int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
|
|
int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
|
|
struct ceph_acls_info *info);
|
|
void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info);
|
|
void ceph_release_acls_info(struct ceph_acls_info *info);
|
|
|
|
static inline void ceph_forget_all_cached_acls(struct inode *inode)
|
|
{
|
|
forget_all_cached_acls(inode);
|
|
}
|
|
|
|
#else
|
|
|
|
#define ceph_get_acl NULL
|
|
#define ceph_set_acl NULL
|
|
|
|
static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
|
|
struct ceph_acls_info *info)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void ceph_init_inode_acls(struct inode *inode,
|
|
struct ceph_acls_info *info)
|
|
{
|
|
}
|
|
static inline void ceph_release_acls_info(struct ceph_acls_info *info)
|
|
{
|
|
}
|
|
static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ceph_forget_all_cached_acls(struct inode *inode)
|
|
{
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}
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#endif
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/* caps.c */
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extern const char *ceph_cap_string(int c);
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extern void ceph_handle_caps(struct ceph_mds_session *session,
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struct ceph_msg *msg);
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extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
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struct ceph_cap_reservation *ctx);
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extern void ceph_add_cap(struct inode *inode,
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struct ceph_mds_session *session, u64 cap_id,
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int fmode, unsigned issued, unsigned wanted,
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unsigned cap, unsigned seq, u64 realmino, int flags,
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struct ceph_cap **new_cap);
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extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
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extern void ceph_put_cap(struct ceph_mds_client *mdsc,
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struct ceph_cap *cap);
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extern int ceph_is_any_caps(struct inode *inode);
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extern void ceph_queue_caps_release(struct inode *inode);
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extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
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extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
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int datasync);
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extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
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struct ceph_mds_session *session);
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extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
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struct ceph_mds_session *session);
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extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
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int mds);
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extern int ceph_get_cap_mds(struct inode *inode);
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extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
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extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
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extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
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struct ceph_snap_context *snapc);
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extern void ceph_flush_snaps(struct ceph_inode_info *ci,
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struct ceph_mds_session **psession);
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extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
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extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
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struct ceph_mds_session *session);
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extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
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extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
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extern int ceph_drop_caps_for_unlink(struct inode *inode);
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extern int ceph_encode_inode_release(void **p, struct inode *inode,
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int mds, int drop, int unless, int force);
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extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
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struct inode *dir,
|
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int mds, int drop, int unless);
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|
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extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
|
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loff_t endoff, int *got, struct page **pinned_page);
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extern int ceph_try_get_caps(struct ceph_inode_info *ci,
|
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int need, int want, int *got);
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|
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/* for counting open files by mode */
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extern void __ceph_get_fmode(struct ceph_inode_info *ci, int mode);
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extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
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/* addr.c */
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extern const struct address_space_operations ceph_aops;
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extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
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extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
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extern int ceph_pool_perm_check(struct ceph_inode_info *ci, int need);
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extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
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|
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/* file.c */
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extern const struct file_operations ceph_file_fops;
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|
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extern int ceph_renew_caps(struct inode *inode);
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extern int ceph_open(struct inode *inode, struct file *file);
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extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
|
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struct file *file, unsigned flags, umode_t mode);
|
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extern int ceph_release(struct inode *inode, struct file *filp);
|
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extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
|
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char *data, size_t len);
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|
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/* dir.c */
|
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extern const struct file_operations ceph_dir_fops;
|
|
extern const struct file_operations ceph_snapdir_fops;
|
|
extern const struct inode_operations ceph_dir_iops;
|
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extern const struct inode_operations ceph_snapdir_iops;
|
|
extern const struct dentry_operations ceph_dentry_ops;
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|
|
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extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
|
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extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
|
|
extern int ceph_handle_snapdir(struct ceph_mds_request *req,
|
|
struct dentry *dentry, int err);
|
|
extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
|
|
struct dentry *dentry, int err);
|
|
|
|
extern void ceph_dentry_lru_add(struct dentry *dn);
|
|
extern void ceph_dentry_lru_touch(struct dentry *dn);
|
|
extern void ceph_dentry_lru_del(struct dentry *dn);
|
|
extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
|
|
extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
|
|
extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
|
|
|
|
/* ioctl.c */
|
|
extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
|
|
|
|
/* export.c */
|
|
extern const struct export_operations ceph_export_ops;
|
|
|
|
/* locks.c */
|
|
extern __init void ceph_flock_init(void);
|
|
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_to_buffer(struct inode *inode,
|
|
struct ceph_filelock *flocks,
|
|
int num_fcntl_locks,
|
|
int num_flock_locks);
|
|
extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
|
|
struct ceph_pagelist *pagelist,
|
|
int num_fcntl_locks, int num_flock_locks);
|
|
|
|
/* debugfs.c */
|
|
extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
|
|
extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
|
|
|
|
/* quota.c */
|
|
static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci)
|
|
{
|
|
return ci->i_max_files || ci->i_max_bytes;
|
|
}
|
|
|
|
extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
|
|
|
|
static inline void __ceph_update_quota(struct ceph_inode_info *ci,
|
|
u64 max_bytes, u64 max_files)
|
|
{
|
|
bool had_quota, has_quota;
|
|
had_quota = __ceph_has_any_quota(ci);
|
|
ci->i_max_bytes = max_bytes;
|
|
ci->i_max_files = max_files;
|
|
has_quota = __ceph_has_any_quota(ci);
|
|
|
|
if (had_quota != has_quota)
|
|
ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota);
|
|
}
|
|
|
|
extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session,
|
|
struct ceph_msg *msg);
|
|
extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
|
|
extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
|
|
extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
|
|
loff_t newlen);
|
|
extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
|
|
loff_t newlen);
|
|
extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
|
|
struct kstatfs *buf);
|
|
|
|
#endif /* _FS_CEPH_SUPER_H */
|