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340 lines
10 KiB
340 lines
10 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _FS_CEPH_LIBCEPH_H |
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#define _FS_CEPH_LIBCEPH_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/bug.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/refcount.h> |
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#include <linux/ceph/types.h> |
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#include <linux/ceph/messenger.h> |
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#include <linux/ceph/msgpool.h> |
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#include <linux/ceph/mon_client.h> |
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#include <linux/ceph/osd_client.h> |
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#include <linux/ceph/ceph_fs.h> |
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#include <linux/ceph/string_table.h> |
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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_NOCRC (1<<3) /* no data crc on writes (msgr1) */ |
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#define CEPH_OPT_TCP_NODELAY (1<<4) /* TCP_NODELAY on TCP sockets */ |
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#define CEPH_OPT_NOMSGSIGN (1<<5) /* don't sign msgs (msgr1) */ |
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#define CEPH_OPT_ABORT_ON_FULL (1<<6) /* abort w/ ENOSPC when full */ |
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#define CEPH_OPT_DEFAULT (CEPH_OPT_TCP_NODELAY) |
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#define ceph_set_opt(client, opt) \ |
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(client)->options->flags |= CEPH_OPT_##opt; |
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#define ceph_test_opt(client, opt) \ |
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(!!((client)->options->flags & CEPH_OPT_##opt)) |
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struct ceph_options { |
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int flags; |
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struct ceph_fsid fsid; |
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struct ceph_entity_addr my_addr; |
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unsigned long mount_timeout; /* jiffies */ |
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unsigned long osd_idle_ttl; /* jiffies */ |
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unsigned long osd_keepalive_timeout; /* jiffies */ |
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unsigned long osd_request_timeout; /* jiffies */ |
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u32 read_from_replica; /* CEPH_OSD_FLAG_BALANCE/LOCALIZE_READS */ |
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int con_modes[2]; /* CEPH_CON_MODE_* */ |
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/* |
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* any type that can't be simply compared or doesn't need |
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* to be compared should go beyond this point, |
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* ceph_compare_options() should be updated accordingly |
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*/ |
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struct ceph_entity_addr *mon_addr; /* should be the first |
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pointer type of args */ |
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int num_mon; |
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char *name; |
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struct ceph_crypto_key *key; |
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struct rb_root crush_locs; |
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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 msecs_to_jiffies(60 * 1000) |
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#define CEPH_OSD_KEEPALIVE_DEFAULT msecs_to_jiffies(5 * 1000) |
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#define CEPH_OSD_IDLE_TTL_DEFAULT msecs_to_jiffies(60 * 1000) |
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#define CEPH_OSD_REQUEST_TIMEOUT_DEFAULT 0 /* no timeout */ |
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#define CEPH_READ_FROM_REPLICA_DEFAULT 0 /* read from primary */ |
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#define CEPH_MONC_HUNT_INTERVAL msecs_to_jiffies(3 * 1000) |
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#define CEPH_MONC_PING_INTERVAL msecs_to_jiffies(10 * 1000) |
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#define CEPH_MONC_PING_TIMEOUT msecs_to_jiffies(30 * 1000) |
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#define CEPH_MONC_HUNT_BACKOFF 2 |
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#define CEPH_MONC_HUNT_MAX_MULT 10 |
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#define CEPH_MSG_MAX_CONTROL_LEN (16*1024*1024) |
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#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) |
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#define CEPH_MSG_MAX_MIDDLE_LEN (16*1024*1024) |
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/* |
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* The largest possible rbd data object is 32M. |
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* The largest possible rbd object map object is 64M. |
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* |
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* There is no limit on the size of cephfs objects, but it has to obey |
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* rsize and wsize mount options anyway. |
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*/ |
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#define CEPH_MSG_MAX_DATA_LEN (64*1024*1024) |
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#define CEPH_AUTH_NAME_DEFAULT "guest" |
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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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CEPH_MOUNT_RECOVER, |
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}; |
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static inline unsigned long ceph_timeout_jiffies(unsigned long timeout) |
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{ |
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return timeout ?: MAX_SCHEDULE_TIMEOUT; |
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} |
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struct ceph_mds_client; |
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/* |
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* per 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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void *private; |
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struct ceph_options *options; |
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struct mutex mount_mutex; /* serialize mount attempts */ |
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wait_queue_head_t auth_wq; |
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int auth_err; |
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int (*extra_mon_dispatch)(struct ceph_client *, struct ceph_msg *); |
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u64 supported_features; |
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u64 required_features; |
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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_osd_client osdc; |
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#ifdef CONFIG_DEBUG_FS |
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struct dentry *debugfs_dir; |
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struct dentry *debugfs_monmap; |
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struct dentry *debugfs_osdmap; |
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struct dentry *debugfs_options; |
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#endif |
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}; |
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#define from_msgr(ms) container_of(ms, struct ceph_client, msgr) |
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static inline bool ceph_msgr2(struct ceph_client *client) |
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{ |
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return client->options->con_modes[0] != CEPH_CON_MODE_UNKNOWN; |
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} |
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/* |
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* snapshots |
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*/ |
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/* |
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* A "snap context" is the set of existing snapshots when we |
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* write data. It is used by the OSD to guide its COW behavior. |
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* |
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* The ceph_snap_context is refcounted, and attached to each dirty |
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* page, indicating which context the dirty data belonged when it was |
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* dirtied. |
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*/ |
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struct ceph_snap_context { |
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refcount_t nref; |
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u64 seq; |
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u32 num_snaps; |
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u64 snaps[]; |
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}; |
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extern struct ceph_snap_context *ceph_create_snap_context(u32 snap_count, |
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gfp_t gfp_flags); |
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extern struct ceph_snap_context *ceph_get_snap_context( |
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struct ceph_snap_context *sc); |
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extern void ceph_put_snap_context(struct ceph_snap_context *sc); |
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/* |
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* calculate the number of pages a given length and offset map onto, |
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* if we align the data. |
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*/ |
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static inline int calc_pages_for(u64 off, u64 len) |
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{ |
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return ((off+len+PAGE_SIZE-1) >> PAGE_SHIFT) - |
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(off >> PAGE_SHIFT); |
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} |
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#define RB_BYVAL(a) (a) |
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#define RB_BYPTR(a) (&(a)) |
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#define RB_CMP3WAY(a, b) ((a) < (b) ? -1 : (a) > (b)) |
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#define DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \ |
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static bool __insert_##name(struct rb_root *root, type *t) \ |
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{ \ |
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struct rb_node **n = &root->rb_node; \ |
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struct rb_node *parent = NULL; \ |
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\ |
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BUG_ON(!RB_EMPTY_NODE(&t->nodefld)); \ |
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\ |
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while (*n) { \ |
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type *cur = rb_entry(*n, type, nodefld); \ |
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int cmp; \ |
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\ |
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parent = *n; \ |
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cmp = cmpexp(keyexp(t->keyfld), keyexp(cur->keyfld)); \ |
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if (cmp < 0) \ |
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n = &(*n)->rb_left; \ |
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else if (cmp > 0) \ |
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n = &(*n)->rb_right; \ |
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else \ |
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return false; \ |
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} \ |
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\ |
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rb_link_node(&t->nodefld, parent, n); \ |
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rb_insert_color(&t->nodefld, root); \ |
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return true; \ |
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} \ |
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static void __maybe_unused insert_##name(struct rb_root *root, type *t) \ |
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{ \ |
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if (!__insert_##name(root, t)) \ |
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BUG(); \ |
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} \ |
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static void erase_##name(struct rb_root *root, type *t) \ |
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{ \ |
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BUG_ON(RB_EMPTY_NODE(&t->nodefld)); \ |
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rb_erase(&t->nodefld, root); \ |
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RB_CLEAR_NODE(&t->nodefld); \ |
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} |
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/* |
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* @lookup_param_type is a parameter and not constructed from (@type, |
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* @keyfld) with typeof() because adding const is too unwieldy. |
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*/ |
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#define DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \ |
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lookup_param_type, nodefld) \ |
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static type *lookup_##name(struct rb_root *root, lookup_param_type key) \ |
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{ \ |
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struct rb_node *n = root->rb_node; \ |
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\ |
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while (n) { \ |
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type *cur = rb_entry(n, type, nodefld); \ |
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int cmp; \ |
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\ |
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cmp = cmpexp(key, keyexp(cur->keyfld)); \ |
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if (cmp < 0) \ |
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n = n->rb_left; \ |
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else if (cmp > 0) \ |
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n = n->rb_right; \ |
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else \ |
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return cur; \ |
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} \ |
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\ |
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return NULL; \ |
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} |
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#define DEFINE_RB_FUNCS2(name, type, keyfld, cmpexp, keyexp, \ |
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lookup_param_type, nodefld) \ |
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DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, cmpexp, keyexp, nodefld) \ |
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DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, cmpexp, keyexp, \ |
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lookup_param_type, nodefld) |
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/* |
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* Shorthands for integer keys. |
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*/ |
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#define DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \ |
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DEFINE_RB_INSDEL_FUNCS2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, nodefld) |
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#define DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) \ |
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extern type __lookup_##name##_key; \ |
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DEFINE_RB_LOOKUP_FUNC2(name, type, keyfld, RB_CMP3WAY, RB_BYVAL, \ |
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typeof(__lookup_##name##_key.keyfld), nodefld) |
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#define DEFINE_RB_FUNCS(name, type, keyfld, nodefld) \ |
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DEFINE_RB_INSDEL_FUNCS(name, type, keyfld, nodefld) \ |
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DEFINE_RB_LOOKUP_FUNC(name, type, keyfld, nodefld) |
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extern struct kmem_cache *ceph_inode_cachep; |
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extern struct kmem_cache *ceph_cap_cachep; |
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extern struct kmem_cache *ceph_cap_flush_cachep; |
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extern struct kmem_cache *ceph_dentry_cachep; |
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extern struct kmem_cache *ceph_file_cachep; |
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extern struct kmem_cache *ceph_dir_file_cachep; |
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extern struct kmem_cache *ceph_mds_request_cachep; |
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extern mempool_t *ceph_wb_pagevec_pool; |
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/* ceph_common.c */ |
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extern bool libceph_compatible(void *data); |
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extern const char *ceph_msg_type_name(int type); |
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extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); |
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extern void *ceph_kvmalloc(size_t size, gfp_t flags); |
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struct fs_parameter; |
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struct fc_log; |
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struct ceph_options *ceph_alloc_options(void); |
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int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt, |
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struct fc_log *l); |
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int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt, |
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struct fc_log *l); |
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int ceph_print_client_options(struct seq_file *m, struct ceph_client *client, |
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bool show_all); |
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extern void ceph_destroy_options(struct ceph_options *opt); |
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extern int ceph_compare_options(struct ceph_options *new_opt, |
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struct ceph_client *client); |
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struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private); |
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struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client); |
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u64 ceph_client_gid(struct ceph_client *client); |
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extern void ceph_destroy_client(struct ceph_client *client); |
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extern void ceph_reset_client_addr(struct ceph_client *client); |
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extern int __ceph_open_session(struct ceph_client *client, |
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unsigned long started); |
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extern int ceph_open_session(struct ceph_client *client); |
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int ceph_wait_for_latest_osdmap(struct ceph_client *client, |
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unsigned long timeout); |
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/* pagevec.c */ |
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extern void ceph_release_page_vector(struct page **pages, int num_pages); |
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extern void ceph_put_page_vector(struct page **pages, int num_pages, |
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bool dirty); |
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extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags); |
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extern int ceph_copy_user_to_page_vector(struct page **pages, |
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const void __user *data, |
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loff_t off, size_t len); |
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extern void ceph_copy_to_page_vector(struct page **pages, |
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const void *data, |
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loff_t off, size_t len); |
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extern void ceph_copy_from_page_vector(struct page **pages, |
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void *data, |
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loff_t off, size_t len); |
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extern void ceph_zero_page_vector_range(int off, int len, struct page **pages); |
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#endif /* _FS_CEPH_SUPER_H */
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