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901 lines
27 KiB
901 lines
27 KiB
#ifndef _FS_CEPH_SUPER_H
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#define _FS_CEPH_SUPER_H
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#include "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 "types.h"
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#include "messenger.h"
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#include "msgpool.h"
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#include "mon_client.h"
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#include "mds_client.h"
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#include "osd_client.h"
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#include "ceph_fs.h"
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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 20 /* 1 MB */
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#define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
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/*
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* mount options
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*/
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#define CEPH_OPT_FSID (1<<0)
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#define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */
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#define CEPH_OPT_MYIP (1<<2) /* specified my ip */
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#define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */
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#define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
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#define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */
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#define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
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#define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES)
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#define ceph_set_opt(client, opt) \
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(client)->mount_args->flags |= CEPH_OPT_##opt;
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#define ceph_test_opt(client, opt) \
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(!!((client)->mount_args->flags & CEPH_OPT_##opt))
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struct ceph_mount_args {
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int sb_flags;
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int num_mon;
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struct ceph_entity_addr *mon_addr;
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int flags;
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int mount_timeout;
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int osd_idle_ttl;
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int caps_wanted_delay_min, caps_wanted_delay_max;
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struct ceph_fsid fsid;
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struct ceph_entity_addr my_addr;
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int wsize;
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int rsize; /* max readahead */
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int max_readdir; /* max readdir size */
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int congestion_kb; /* max readdir size */
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int osd_timeout;
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int osd_keepalive_timeout;
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char *snapdir_name; /* default ".snap" */
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char *name;
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char *secret;
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int cap_release_safety;
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};
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/*
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* defaults
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*/
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#define CEPH_MOUNT_TIMEOUT_DEFAULT 60
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#define CEPH_OSD_TIMEOUT_DEFAULT 60 /* seconds */
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#define CEPH_OSD_KEEPALIVE_DEFAULT 5
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#define CEPH_OSD_IDLE_TTL_DEFAULT 60
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#define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */
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#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)
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#define CEPH_MSG_MAX_DATA_LEN (16*1024*1024)
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#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
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#define CEPH_AUTH_NAME_DEFAULT "guest"
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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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/* mount state */
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enum {
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CEPH_MOUNT_MOUNTING,
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CEPH_MOUNT_MOUNTED,
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CEPH_MOUNT_UNMOUNTING,
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CEPH_MOUNT_UNMOUNTED,
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CEPH_MOUNT_SHUTDOWN,
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};
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/*
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* subtract jiffies
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*/
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static inline unsigned long time_sub(unsigned long a, unsigned long b)
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{
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BUG_ON(time_after(b, a));
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return (long)a - (long)b;
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}
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/*
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* per-filesystem client state
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*
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* possibly shared by multiple mount points, if they are
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* mounting the same ceph filesystem/cluster.
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*/
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struct ceph_client {
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struct ceph_fsid fsid;
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bool have_fsid;
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struct mutex mount_mutex; /* serialize mount attempts */
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struct ceph_mount_args *mount_args;
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struct super_block *sb;
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unsigned long mount_state;
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wait_queue_head_t auth_wq;
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int auth_err;
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int min_caps; /* min caps i added */
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struct ceph_messenger *msgr; /* messenger instance */
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struct ceph_mon_client monc;
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struct ceph_mds_client mdsc;
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struct ceph_osd_client osdc;
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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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struct backing_dev_info backing_dev_info;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_monmap;
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struct dentry *debugfs_mdsmap, *debugfs_osdmap;
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struct dentry *debugfs_dir, *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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#endif
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};
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static inline struct ceph_client *ceph_client(struct super_block *sb)
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{
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return sb->s_fs_info;
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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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int mds;
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u64 cap_id; /* unique cap id (mds provided) */
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int issued; /* latest, from the mds */
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int implemented; /* implemented superset of issued (for revocation) */
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int mds_wanted;
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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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/*
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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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atomic_t nref;
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struct ceph_inode_info *ci;
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struct list_head ci_item, flushing_item;
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u64 follows, flush_tid;
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int issued, dirty;
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struct ceph_snap_context *context;
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mode_t mode;
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uid_t uid;
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gid_t gid;
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void *xattr_blob;
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int xattr_len;
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u64 xattr_version;
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u64 size;
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struct timespec mtime, atime, ctime;
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u64 time_warp_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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};
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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 (atomic_dec_and_test(&capsnap->nref))
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kfree(capsnap);
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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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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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#define CEPH_I_COMPLETE 1 /* we have complete directory cached */
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#define CEPH_I_NODELAY 4 /* do not delay cap release */
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#define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
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#define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
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struct ceph_inode_info {
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struct ceph_vino i_vino; /* ceph ino + snap */
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u64 i_version;
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u32 i_time_warp_seq;
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unsigned i_ceph_flags;
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unsigned long i_release_count;
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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 timespec 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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u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */
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struct rb_root i_fragtree;
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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_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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u64 i_cap_flush_seq;
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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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u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
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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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int i_cap_exporting_mds; /* to handle cap migration between */
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unsigned i_cap_exporting_mseq; /* mds's. */
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unsigned i_cap_exporting_issued;
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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 */
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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_NUM]; /* open file counts */
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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;
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int i_wrbuffer_ref, i_wrbuffer_ref_head;
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u32 i_shared_gen; /* increment each time we get FILE_SHARED */
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u32 i_rdcache_gen; /* we increment this each time we get
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FILE_CACHE. If it's non-zero, we
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_may_ have cached pages. */
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u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
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struct list_head i_unsafe_writes; /* uncommitted sync writes */
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struct list_head i_unsafe_dirops; /* uncommitted mds dir 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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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 void ceph_i_clear(struct inode *inode, unsigned mask)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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spin_lock(&inode->i_lock);
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ci->i_ceph_flags &= ~mask;
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spin_unlock(&inode->i_lock);
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}
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static inline void ceph_i_set(struct inode *inode, unsigned mask)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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spin_lock(&inode->i_lock);
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ci->i_ceph_flags |= mask;
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spin_unlock(&inode->i_lock);
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}
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static inline bool ceph_i_test(struct inode *inode, unsigned mask)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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bool r;
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smp_mb();
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r = (ci->i_ceph_flags & mask) == mask;
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return r;
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}
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/* find a specific frag @f */
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extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
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u32 f);
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/*
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* choose fragment for value @v. copy frag content to pfrag, if leaf
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* exists
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*/
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extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag,
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int *found);
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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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u32 lease_gen, lease_shared_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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u64 time;
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u64 offset;
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};
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static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
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{
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return (struct ceph_dentry_info *)dentry->d_fsdata;
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}
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static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
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{
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return ((loff_t)frag << 32) | (loff_t)off;
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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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* don't include snap in ino hash, at least for now.
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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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ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */
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#if BITS_PER_LONG == 32
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ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8;
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if (!ino)
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ino = 1;
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#endif
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return ino;
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}
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static inline int ceph_set_ino_cb(struct inode *inode, void *data)
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{
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ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
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inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
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return 0;
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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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/* 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 &&
|
|
ci->i_vino.snap == pvino->snap;
|
|
}
|
|
|
|
static inline struct inode *ceph_find_inode(struct super_block *sb,
|
|
struct ceph_vino vino)
|
|
{
|
|
ino_t t = ceph_vino_to_ino(vino);
|
|
return ilookup5(sb, t, ceph_ino_compare, &vino);
|
|
}
|
|
|
|
|
|
/*
|
|
* 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->vfs_inode.i_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
spin_unlock(&ci->vfs_inode.i_lock);
|
|
return issued;
|
|
}
|
|
|
|
static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
|
|
int touch)
|
|
{
|
|
int r;
|
|
spin_lock(&ci->vfs_inode.i_lock);
|
|
r = __ceph_caps_issued_mask(ci, mask, touch);
|
|
spin_unlock(&ci->vfs_inode.i_lock);
|
|
return r;
|
|
}
|
|
|
|
static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
|
|
{
|
|
return ci->i_dirty_caps | ci->i_flushing_caps;
|
|
}
|
|
extern void __ceph_mark_dirty_caps(struct ceph_inode_info *ci, 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);
|
|
|
|
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_reservation_status(struct ceph_client *client,
|
|
int *total, int *avail, int *used,
|
|
int *reserved, int *min);
|
|
|
|
static inline struct ceph_client *ceph_inode_to_client(struct inode *inode)
|
|
{
|
|
return (struct ceph_client *)inode->i_sb->s_fs_info;
|
|
}
|
|
|
|
static inline struct ceph_client *ceph_sb_to_client(struct super_block *sb)
|
|
{
|
|
return (struct ceph_client *)sb->s_fs_info;
|
|
}
|
|
|
|
|
|
/*
|
|
* we keep buffered readdir results attached to file->private_data
|
|
*/
|
|
struct ceph_file_info {
|
|
int fmode; /* initialized on open */
|
|
|
|
/* readdir: position within the dir */
|
|
u32 frag;
|
|
struct ceph_mds_request *last_readdir;
|
|
int at_end;
|
|
|
|
/* readdir: position within a frag */
|
|
unsigned offset; /* offset of last chunk, adjusted for . and .. */
|
|
u64 next_offset; /* offset of next chunk (last_name's + 1) */
|
|
char *last_name; /* last entry in previous chunk */
|
|
struct dentry *dentry; /* next dentry (for dcache readdir) */
|
|
unsigned long dir_release_count;
|
|
|
|
/* used for -o dirstat read() on directory thing */
|
|
char *dir_info;
|
|
int dir_info_len;
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
* snapshots
|
|
*/
|
|
|
|
/*
|
|
* A "snap context" is the set of existing snapshots when we
|
|
* write data. It is used by the OSD to guide its COW behavior.
|
|
*
|
|
* The ceph_snap_context is refcounted, and attached to each dirty
|
|
* page, indicating which context the dirty data belonged when it was
|
|
* dirtied.
|
|
*/
|
|
struct ceph_snap_context {
|
|
atomic_t nref;
|
|
u64 seq;
|
|
int num_snaps;
|
|
u64 snaps[];
|
|
};
|
|
|
|
static inline struct ceph_snap_context *
|
|
ceph_get_snap_context(struct ceph_snap_context *sc)
|
|
{
|
|
/*
|
|
printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
|
|
atomic_read(&sc->nref)+1);
|
|
*/
|
|
if (sc)
|
|
atomic_inc(&sc->nref);
|
|
return sc;
|
|
}
|
|
|
|
static inline void ceph_put_snap_context(struct ceph_snap_context *sc)
|
|
{
|
|
if (!sc)
|
|
return;
|
|
/*
|
|
printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref),
|
|
atomic_read(&sc->nref)-1);
|
|
*/
|
|
if (atomic_dec_and_test(&sc->nref)) {
|
|
/*printk(" deleting snap_context %p\n", sc);*/
|
|
kfree(sc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
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 */
|
|
int num_prior_parent_snaps; /* had prior to parent_since */
|
|
u64 *snaps; /* snaps specific to this realm */
|
|
int 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 */
|
|
|
|
/* 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;
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
* calculate the number of pages a given length and offset map onto,
|
|
* if we align the data.
|
|
*/
|
|
static inline int calc_pages_for(u64 off, u64 len)
|
|
{
|
|
return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) -
|
|
(off >> PAGE_CACHE_SHIFT);
|
|
}
|
|
|
|
|
|
|
|
/* 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);
|
|
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,
|
|
struct ceph_snap_context *snapc);
|
|
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_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
|
|
ci_item)->writing;
|
|
}
|
|
|
|
|
|
/* super.c */
|
|
extern struct kmem_cache *ceph_inode_cachep;
|
|
extern struct kmem_cache *ceph_cap_cachep;
|
|
extern struct kmem_cache *ceph_dentry_cachep;
|
|
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;
|
|
|
|
extern struct inode *ceph_alloc_inode(struct super_block *sb);
|
|
extern void ceph_destroy_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 timespec *ctime,
|
|
struct timespec *mtime, struct timespec *atime);
|
|
extern int ceph_fill_trace(struct super_block *sb,
|
|
struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session);
|
|
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 int 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, int mask);
|
|
extern int ceph_permission(struct inode *inode, int mask);
|
|
extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
|
|
extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
|
struct kstat *stat);
|
|
|
|
/* xattr.c */
|
|
extern int ceph_setxattr(struct dentry *, const char *, const void *,
|
|
size_t, int);
|
|
extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
|
|
extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
|
|
extern int ceph_removexattr(struct dentry *, const char *);
|
|
extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
|
|
extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
|
|
|
|
/* caps.c */
|
|
extern const char *ceph_cap_string(int c);
|
|
extern void ceph_handle_caps(struct ceph_mds_session *session,
|
|
struct ceph_msg *msg);
|
|
extern int ceph_add_cap(struct inode *inode,
|
|
struct ceph_mds_session *session, u64 cap_id,
|
|
int fmode, unsigned issued, unsigned wanted,
|
|
unsigned cap, unsigned seq, u64 realmino, int flags,
|
|
struct ceph_cap_reservation *caps_reservation);
|
|
extern void __ceph_remove_cap(struct ceph_cap *cap);
|
|
static inline void ceph_remove_cap(struct ceph_cap *cap)
|
|
{
|
|
struct inode *inode = &cap->ci->vfs_inode;
|
|
spin_lock(&inode->i_lock);
|
|
__ceph_remove_cap(cap);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
extern void ceph_put_cap(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, struct dentry *dentry, int datasync);
|
|
extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
|
|
struct ceph_mds_session *session);
|
|
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);
|
|
extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
|
|
struct ceph_snap_context *snapc);
|
|
extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
|
|
struct ceph_mds_session **psession);
|
|
extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
|
|
struct ceph_mds_session *session);
|
|
extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
|
|
extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
|
|
|
|
extern int ceph_encode_inode_release(void **p, struct inode *inode,
|
|
int mds, int drop, int unless, int force);
|
|
extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
|
|
int mds, int drop, int unless);
|
|
|
|
extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
|
|
int *got, loff_t endoff);
|
|
|
|
/* for counting open files by mode */
|
|
static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
|
|
{
|
|
ci->i_nr_by_mode[mode]++;
|
|
}
|
|
extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
|
|
|
|
/* addr.c */
|
|
extern const struct address_space_operations ceph_aops;
|
|
extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
|
|
|
|
/* file.c */
|
|
extern const struct file_operations ceph_file_fops;
|
|
extern const struct address_space_operations ceph_aops;
|
|
extern int ceph_open(struct inode *inode, struct file *file);
|
|
extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
|
|
struct nameidata *nd, int mode,
|
|
int locked_dir);
|
|
extern int ceph_release(struct inode *inode, struct file *filp);
|
|
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,
|
|
ceph_snapdir_dentry_ops;
|
|
|
|
extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
|
|
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);
|
|
|
|
/*
|
|
* our d_ops vary depending on whether the inode is live,
|
|
* snapshotted (read-only), or a virtual ".snap" directory.
|
|
*/
|
|
int ceph_init_dentry(struct dentry *dentry);
|
|
|
|
|
|
/* 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;
|
|
|
|
/* debugfs.c */
|
|
extern int ceph_debugfs_init(void);
|
|
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);
|
|
|
|
static inline struct inode *get_dentry_parent_inode(struct dentry *dentry)
|
|
{
|
|
if (dentry && dentry->d_parent)
|
|
return dentry->d_parent->d_inode;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* _FS_CEPH_SUPER_H */
|
|
|