fs/ceph/super.h

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
ceph_put_cap_snap
ceph_inode_to_client
ceph_sb_to_client
ceph_ino_to_ino32
ceph_vino_to_ino
ceph_translate_ino
ceph_translate_ino
ceph_ino
ceph_snap
ceph_ino_compare
ceph_find_inode
ceph_set_error_write
ceph_clear_error_write
__ceph_dir_set_complete
__ceph_dir_clear_complete
__ceph_dir_clear_ordered
__ceph_dir_is_complete
__ceph_dir_is_complete_ordered
ceph_dir_clear_complete
ceph_dir_clear_ordered
ceph_dir_is_complete_ordered
__ceph_is_any_real_caps
ceph_caps_issued
ceph_caps_issued_mask
__ceph_caps_dirty
__ceph_caps_wanted
ceph_add_rw_context
ceph_del_rw_context
ceph_find_rw_context
default_congestion_kb
__ceph_have_pending_cap_snap
ceph_do_getattr
ceph_security_xattr_deadlock
ceph_security_xattr_wanted
ceph_security_invalidate_secctx
ceph_security_init_secctx
ceph_security_invalidate_secctx
ceph_forget_all_cached_acls
ceph_pre_init_acls
ceph_init_inode_acls
ceph_acl_chmod
ceph_forget_all_cached_acls
__ceph_has_any_quota
__ceph_update_quota
   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _FS_CEPH_SUPER_H
   3 #define _FS_CEPH_SUPER_H
   4 
   5 #include <linux/ceph/ceph_debug.h>
   6 
   7 #include <asm/unaligned.h>
   8 #include <linux/backing-dev.h>
   9 #include <linux/completion.h>
  10 #include <linux/exportfs.h>
  11 #include <linux/fs.h>
  12 #include <linux/mempool.h>
  13 #include <linux/pagemap.h>
  14 #include <linux/wait.h>
  15 #include <linux/writeback.h>
  16 #include <linux/slab.h>
  17 #include <linux/posix_acl.h>
  18 #include <linux/refcount.h>
  19 #include <linux/security.h>
  20 
  21 #include <linux/ceph/libceph.h>
  22 
  23 #ifdef CONFIG_CEPH_FSCACHE
  24 #include <linux/fscache.h>
  25 #endif
  26 
  27 /* f_type in struct statfs */
  28 #define CEPH_SUPER_MAGIC 0x00c36400
  29 
  30 /* large granularity for statfs utilization stats to facilitate
  31  * large volume sizes on 32-bit machines. */
  32 #define CEPH_BLOCK_SHIFT   22  /* 4 MB */
  33 #define CEPH_BLOCK         (1 << CEPH_BLOCK_SHIFT)
  34 
  35 #define CEPH_MOUNT_OPT_CLEANRECOVER    (1<<1) /* auto reonnect (clean mode) after blacklisted */
  36 #define CEPH_MOUNT_OPT_DIRSTAT         (1<<4) /* `cat dirname` for stats */
  37 #define CEPH_MOUNT_OPT_RBYTES          (1<<5) /* dir st_bytes = rbytes */
  38 #define CEPH_MOUNT_OPT_NOASYNCREADDIR  (1<<7) /* no dcache readdir */
  39 #define CEPH_MOUNT_OPT_INO32           (1<<8) /* 32 bit inos */
  40 #define CEPH_MOUNT_OPT_DCACHE          (1<<9) /* use dcache for readdir etc */
  41 #define CEPH_MOUNT_OPT_FSCACHE         (1<<10) /* use fscache */
  42 #define CEPH_MOUNT_OPT_NOPOOLPERM      (1<<11) /* no pool permission check */
  43 #define CEPH_MOUNT_OPT_MOUNTWAIT       (1<<12) /* mount waits if no mds is up */
  44 #define CEPH_MOUNT_OPT_NOQUOTADF       (1<<13) /* no root dir quota in statfs */
  45 #define CEPH_MOUNT_OPT_NOCOPYFROM      (1<<14) /* don't use RADOS 'copy-from' op */
  46 
  47 #define CEPH_MOUNT_OPT_DEFAULT                  \
  48         (CEPH_MOUNT_OPT_DCACHE |                \
  49          CEPH_MOUNT_OPT_NOCOPYFROM)
  50 
  51 #define ceph_set_mount_opt(fsc, opt) \
  52         (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt;
  53 #define ceph_test_mount_opt(fsc, opt) \
  54         (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
  55 
  56 /* max size of osd read request, limited by libceph */
  57 #define CEPH_MAX_READ_SIZE              CEPH_MSG_MAX_DATA_LEN
  58 /* osd has a configurable limitaion of max write size.
  59  * CEPH_MSG_MAX_DATA_LEN should be small enough. */
  60 #define CEPH_MAX_WRITE_SIZE             CEPH_MSG_MAX_DATA_LEN
  61 #define CEPH_RASIZE_DEFAULT             (8192*1024)    /* max readahead */
  62 #define CEPH_MAX_READDIR_DEFAULT        1024
  63 #define CEPH_MAX_READDIR_BYTES_DEFAULT  (512*1024)
  64 #define CEPH_SNAPDIRNAME_DEFAULT        ".snap"
  65 
  66 /*
  67  * Delay telling the MDS we no longer want caps, in case we reopen
  68  * the file.  Delay a minimum amount of time, even if we send a cap
  69  * message for some other reason.  Otherwise, take the oppotunity to
  70  * update the mds to avoid sending another message later.
  71  */
  72 #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT      5  /* cap release delay */
  73 #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT     60  /* cap release delay */
  74 
  75 struct ceph_mount_options {
  76         int flags;
  77         int sb_flags;
  78 
  79         int wsize;            /* max write size */
  80         int rsize;            /* max read size */
  81         int rasize;           /* max readahead */
  82         int congestion_kb;    /* max writeback in flight */
  83         int caps_wanted_delay_min, caps_wanted_delay_max;
  84         int caps_max;
  85         int max_readdir;       /* max readdir result (entires) */
  86         int max_readdir_bytes; /* max readdir result (bytes) */
  87 
  88         /*
  89          * everything above this point can be memcmp'd; everything below
  90          * is handled in compare_mount_options()
  91          */
  92 
  93         char *snapdir_name;   /* default ".snap" */
  94         char *mds_namespace;  /* default NULL */
  95         char *server_path;    /* default NULL (means "/") */
  96         char *fscache_uniq;   /* default NULL */
  97 };
  98 
  99 struct ceph_fs_client {
 100         struct super_block *sb;
 101 
 102         struct ceph_mount_options *mount_options;
 103         struct ceph_client *client;
 104 
 105         unsigned long mount_state;
 106 
 107         unsigned long last_auto_reconnect;
 108         bool blacklisted;
 109 
 110         u32 filp_gen;
 111         loff_t max_file_size;
 112 
 113         struct ceph_mds_client *mdsc;
 114 
 115         /* writeback */
 116         mempool_t *wb_pagevec_pool;
 117         atomic_long_t writeback_count;
 118 
 119         struct workqueue_struct *inode_wq;
 120         struct workqueue_struct *cap_wq;
 121 
 122 #ifdef CONFIG_DEBUG_FS
 123         struct dentry *debugfs_dentry_lru, *debugfs_caps;
 124         struct dentry *debugfs_congestion_kb;
 125         struct dentry *debugfs_bdi;
 126         struct dentry *debugfs_mdsc, *debugfs_mdsmap;
 127         struct dentry *debugfs_mds_sessions;
 128 #endif
 129 
 130 #ifdef CONFIG_CEPH_FSCACHE
 131         struct fscache_cookie *fscache;
 132 #endif
 133 };
 134 
 135 
 136 /*
 137  * File i/o capability.  This tracks shared state with the metadata
 138  * server that allows us to cache or writeback attributes or to read
 139  * and write data.  For any given inode, we should have one or more
 140  * capabilities, one issued by each metadata server, and our
 141  * cumulative access is the OR of all issued capabilities.
 142  *
 143  * Each cap is referenced by the inode's i_caps rbtree and by per-mds
 144  * session capability lists.
 145  */
 146 struct ceph_cap {
 147         struct ceph_inode_info *ci;
 148         struct rb_node ci_node;          /* per-ci cap tree */
 149         struct ceph_mds_session *session;
 150         struct list_head session_caps;   /* per-session caplist */
 151         u64 cap_id;       /* unique cap id (mds provided) */
 152         union {
 153                 /* in-use caps */
 154                 struct {
 155                         int issued;       /* latest, from the mds */
 156                         int implemented;  /* implemented superset of
 157                                              issued (for revocation) */
 158                         int mds, mds_wanted;
 159                 };
 160                 /* caps to release */
 161                 struct {
 162                         u64 cap_ino;
 163                         int queue_release;
 164                 };
 165         };
 166         u32 seq, issue_seq, mseq;
 167         u32 cap_gen;      /* active/stale cycle */
 168         unsigned long last_used;
 169         struct list_head caps_item;
 170 };
 171 
 172 #define CHECK_CAPS_NODELAY    1  /* do not delay any further */
 173 #define CHECK_CAPS_AUTHONLY   2  /* only check auth cap */
 174 #define CHECK_CAPS_FLUSH      4  /* flush any dirty caps */
 175 
 176 struct ceph_cap_flush {
 177         u64 tid;
 178         int caps; /* 0 means capsnap */
 179         bool wake; /* wake up flush waiters when finish ? */
 180         struct list_head g_list; // global
 181         struct list_head i_list; // per inode
 182 };
 183 
 184 /*
 185  * Snapped cap state that is pending flush to mds.  When a snapshot occurs,
 186  * we first complete any in-process sync writes and writeback any dirty
 187  * data before flushing the snapped state (tracked here) back to the MDS.
 188  */
 189 struct ceph_cap_snap {
 190         refcount_t nref;
 191         struct list_head ci_item;
 192 
 193         struct ceph_cap_flush cap_flush;
 194 
 195         u64 follows;
 196         int issued, dirty;
 197         struct ceph_snap_context *context;
 198 
 199         umode_t mode;
 200         kuid_t uid;
 201         kgid_t gid;
 202 
 203         struct ceph_buffer *xattr_blob;
 204         u64 xattr_version;
 205 
 206         u64 size;
 207         u64 change_attr;
 208         struct timespec64 mtime, atime, ctime, btime;
 209         u64 time_warp_seq;
 210         u64 truncate_size;
 211         u32 truncate_seq;
 212         int writing;   /* a sync write is still in progress */
 213         int dirty_pages;     /* dirty pages awaiting writeback */
 214         bool inline_data;
 215         bool need_flush;
 216 };
 217 
 218 static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
 219 {
 220         if (refcount_dec_and_test(&capsnap->nref)) {
 221                 if (capsnap->xattr_blob)
 222                         ceph_buffer_put(capsnap->xattr_blob);
 223                 kfree(capsnap);
 224         }
 225 }
 226 
 227 /*
 228  * The frag tree describes how a directory is fragmented, potentially across
 229  * multiple metadata servers.  It is also used to indicate points where
 230  * metadata authority is delegated, and whether/where metadata is replicated.
 231  *
 232  * A _leaf_ frag will be present in the i_fragtree IFF there is
 233  * delegation info.  That is, if mds >= 0 || ndist > 0.
 234  */
 235 #define CEPH_MAX_DIRFRAG_REP 4
 236 
 237 struct ceph_inode_frag {
 238         struct rb_node node;
 239 
 240         /* fragtree state */
 241         u32 frag;
 242         int split_by;         /* i.e. 2^(split_by) children */
 243 
 244         /* delegation and replication info */
 245         int mds;              /* -1 if same authority as parent */
 246         int ndist;            /* >0 if replicated */
 247         int dist[CEPH_MAX_DIRFRAG_REP];
 248 };
 249 
 250 /*
 251  * We cache inode xattrs as an encoded blob until they are first used,
 252  * at which point we parse them into an rbtree.
 253  */
 254 struct ceph_inode_xattr {
 255         struct rb_node node;
 256 
 257         const char *name;
 258         int name_len;
 259         const char *val;
 260         int val_len;
 261         int dirty;
 262 
 263         int should_free_name;
 264         int should_free_val;
 265 };
 266 
 267 /*
 268  * Ceph dentry state
 269  */
 270 struct ceph_dentry_info {
 271         struct dentry *dentry;
 272         struct ceph_mds_session *lease_session;
 273         struct list_head lease_list;
 274         unsigned flags;
 275         int lease_shared_gen;
 276         u32 lease_gen;
 277         u32 lease_seq;
 278         unsigned long lease_renew_after, lease_renew_from;
 279         unsigned long time;
 280         u64 offset;
 281 };
 282 
 283 #define CEPH_DENTRY_REFERENCED          1
 284 #define CEPH_DENTRY_LEASE_LIST          2
 285 #define CEPH_DENTRY_SHRINK_LIST         4
 286 
 287 struct ceph_inode_xattrs_info {
 288         /*
 289          * (still encoded) xattr blob. we avoid the overhead of parsing
 290          * this until someone actually calls getxattr, etc.
 291          *
 292          * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
 293          * NULL means we don't know.
 294         */
 295         struct ceph_buffer *blob, *prealloc_blob;
 296 
 297         struct rb_root index;
 298         bool dirty;
 299         int count;
 300         int names_size;
 301         int vals_size;
 302         u64 version, index_version;
 303 };
 304 
 305 /*
 306  * Ceph inode.
 307  */
 308 struct ceph_inode_info {
 309         struct ceph_vino i_vino;   /* ceph ino + snap */
 310 
 311         spinlock_t i_ceph_lock;
 312 
 313         u64 i_version;
 314         u64 i_inline_version;
 315         u32 i_time_warp_seq;
 316 
 317         unsigned i_ceph_flags;
 318         atomic64_t i_release_count;
 319         atomic64_t i_ordered_count;
 320         atomic64_t i_complete_seq[2];
 321 
 322         struct ceph_dir_layout i_dir_layout;
 323         struct ceph_file_layout i_layout;
 324         char *i_symlink;
 325 
 326         /* for dirs */
 327         struct timespec64 i_rctime;
 328         u64 i_rbytes, i_rfiles, i_rsubdirs;
 329         u64 i_files, i_subdirs;
 330 
 331         /* quotas */
 332         u64 i_max_bytes, i_max_files;
 333 
 334         s32 i_dir_pin;
 335 
 336         struct rb_root i_fragtree;
 337         int i_fragtree_nsplits;
 338         struct mutex i_fragtree_mutex;
 339 
 340         struct ceph_inode_xattrs_info i_xattrs;
 341 
 342         /* capabilities.  protected _both_ by i_ceph_lock and cap->session's
 343          * s_mutex. */
 344         struct rb_root i_caps;           /* cap list */
 345         struct ceph_cap *i_auth_cap;     /* authoritative cap, if any */
 346         unsigned i_dirty_caps, i_flushing_caps;     /* mask of dirtied fields */
 347         struct list_head i_dirty_item, i_flushing_item;
 348         /* we need to track cap writeback on a per-cap-bit basis, to allow
 349          * overlapping, pipelined cap flushes to the mds.  we can probably
 350          * reduce the tid to 8 bits if we're concerned about inode size. */
 351         struct ceph_cap_flush *i_prealloc_cap_flush;
 352         struct list_head i_cap_flush_list;
 353         wait_queue_head_t i_cap_wq;      /* threads waiting on a capability */
 354         unsigned long i_hold_caps_min; /* jiffies */
 355         unsigned long i_hold_caps_max; /* jiffies */
 356         struct list_head i_cap_delay_list;  /* for delayed cap release to mds */
 357         struct ceph_cap_reservation i_cap_migration_resv;
 358         struct list_head i_cap_snaps;   /* snapped state pending flush to mds */
 359         struct ceph_snap_context *i_head_snapc;  /* set if wr_buffer_head > 0 or
 360                                                     dirty|flushing caps */
 361         unsigned i_snap_caps;           /* cap bits for snapped files */
 362 
 363         int i_nr_by_mode[CEPH_FILE_MODE_BITS];  /* open file counts */
 364 
 365         struct mutex i_truncate_mutex;
 366         u32 i_truncate_seq;        /* last truncate to smaller size */
 367         u64 i_truncate_size;       /*  and the size we last truncated down to */
 368         int i_truncate_pending;    /*  still need to call vmtruncate */
 369 
 370         u64 i_max_size;            /* max file size authorized by mds */
 371         u64 i_reported_size; /* (max_)size reported to or requested of mds */
 372         u64 i_wanted_max_size;     /* offset we'd like to write too */
 373         u64 i_requested_max_size;  /* max_size we've requested */
 374 
 375         /* held references to caps */
 376         int i_pin_ref;
 377         int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
 378         int i_wrbuffer_ref, i_wrbuffer_ref_head;
 379         atomic_t i_filelock_ref;
 380         atomic_t i_shared_gen;       /* increment each time we get FILE_SHARED */
 381         u32 i_rdcache_gen;      /* incremented each time we get FILE_CACHE. */
 382         u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
 383 
 384         struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
 385         struct list_head i_unsafe_iops;   /* uncommitted mds inode ops */
 386         spinlock_t i_unsafe_lock;
 387 
 388         union {
 389                 struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
 390                 struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
 391         };
 392         int i_snap_realm_counter; /* snap realm (if caps) */
 393         struct list_head i_snap_realm_item;
 394         struct list_head i_snap_flush_item;
 395         struct timespec64 i_btime;
 396         struct timespec64 i_snap_btime;
 397 
 398         struct work_struct i_work;
 399         unsigned long  i_work_mask;
 400 
 401 #ifdef CONFIG_CEPH_FSCACHE
 402         struct fscache_cookie *fscache;
 403         u32 i_fscache_gen;
 404 #endif
 405         errseq_t i_meta_err;
 406 
 407         struct inode vfs_inode; /* at end */
 408 };
 409 
 410 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
 411 {
 412         return container_of(inode, struct ceph_inode_info, vfs_inode);
 413 }
 414 
 415 static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
 416 {
 417         return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
 418 }
 419 
 420 static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
 421 {
 422         return (struct ceph_fs_client *)sb->s_fs_info;
 423 }
 424 
 425 static inline struct ceph_vino ceph_vino(struct inode *inode)
 426 {
 427         return ceph_inode(inode)->i_vino;
 428 }
 429 
 430 /*
 431  * ino_t is <64 bits on many architectures, blech.
 432  *
 433  *               i_ino (kernel inode)   st_ino (userspace)
 434  * i386          32                     32
 435  * x86_64+ino32  64                     32
 436  * x86_64        64                     64
 437  */
 438 static inline u32 ceph_ino_to_ino32(__u64 vino)
 439 {
 440         u32 ino = vino & 0xffffffff;
 441         ino ^= vino >> 32;
 442         if (!ino)
 443                 ino = 2;
 444         return ino;
 445 }
 446 
 447 /*
 448  * kernel i_ino value
 449  */
 450 static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
 451 {
 452 #if BITS_PER_LONG == 32
 453         return ceph_ino_to_ino32(vino.ino);
 454 #else
 455         return (ino_t)vino.ino;
 456 #endif
 457 }
 458 
 459 /*
 460  * user-visible ino (stat, filldir)
 461  */
 462 #if BITS_PER_LONG == 32
 463 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
 464 {
 465         return ino;
 466 }
 467 #else
 468 static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
 469 {
 470         if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
 471                 ino = ceph_ino_to_ino32(ino);
 472         return ino;
 473 }
 474 #endif
 475 
 476 
 477 /* for printf-style formatting */
 478 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
 479 
 480 static inline u64 ceph_ino(struct inode *inode)
 481 {
 482         return ceph_inode(inode)->i_vino.ino;
 483 }
 484 static inline u64 ceph_snap(struct inode *inode)
 485 {
 486         return ceph_inode(inode)->i_vino.snap;
 487 }
 488 
 489 static inline int ceph_ino_compare(struct inode *inode, void *data)
 490 {
 491         struct ceph_vino *pvino = (struct ceph_vino *)data;
 492         struct ceph_inode_info *ci = ceph_inode(inode);
 493         return ci->i_vino.ino == pvino->ino &&
 494                 ci->i_vino.snap == pvino->snap;
 495 }
 496 
 497 static inline struct inode *ceph_find_inode(struct super_block *sb,
 498                                             struct ceph_vino vino)
 499 {
 500         ino_t t = ceph_vino_to_ino(vino);
 501         return ilookup5(sb, t, ceph_ino_compare, &vino);
 502 }
 503 
 504 
 505 /*
 506  * Ceph inode.
 507  */
 508 #define CEPH_I_DIR_ORDERED      (1 << 0)  /* dentries in dir are ordered */
 509 #define CEPH_I_NODELAY          (1 << 1)  /* do not delay cap release */
 510 #define CEPH_I_FLUSH            (1 << 2)  /* do not delay flush of dirty metadata */
 511 #define CEPH_I_POOL_PERM        (1 << 3)  /* pool rd/wr bits are valid */
 512 #define CEPH_I_POOL_RD          (1 << 4)  /* can read from pool */
 513 #define CEPH_I_POOL_WR          (1 << 5)  /* can write to pool */
 514 #define CEPH_I_SEC_INITED       (1 << 6)  /* security initialized */
 515 #define CEPH_I_CAP_DROPPED      (1 << 7)  /* caps were forcibly dropped */
 516 #define CEPH_I_KICK_FLUSH       (1 << 8)  /* kick flushing caps */
 517 #define CEPH_I_FLUSH_SNAPS      (1 << 9)  /* need flush snapss */
 518 #define CEPH_I_ERROR_WRITE      (1 << 10) /* have seen write errors */
 519 #define CEPH_I_ERROR_FILELOCK   (1 << 11) /* have seen file lock errors */
 520 #define CEPH_I_ODIRECT          (1 << 12) /* inode in direct I/O mode */
 521 
 522 /*
 523  * Masks of ceph inode work.
 524  */
 525 #define CEPH_I_WORK_WRITEBACK           0 /* writeback */
 526 #define CEPH_I_WORK_INVALIDATE_PAGES    1 /* invalidate pages */
 527 #define CEPH_I_WORK_VMTRUNCATE          2 /* vmtruncate */
 528 
 529 /*
 530  * We set the ERROR_WRITE bit when we start seeing write errors on an inode
 531  * and then clear it when they start succeeding. Note that we do a lockless
 532  * check first, and only take the lock if it looks like it needs to be changed.
 533  * The write submission code just takes this as a hint, so we're not too
 534  * worried if a few slip through in either direction.
 535  */
 536 static inline void ceph_set_error_write(struct ceph_inode_info *ci)
 537 {
 538         if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
 539                 spin_lock(&ci->i_ceph_lock);
 540                 ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
 541                 spin_unlock(&ci->i_ceph_lock);
 542         }
 543 }
 544 
 545 static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
 546 {
 547         if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
 548                 spin_lock(&ci->i_ceph_lock);
 549                 ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
 550                 spin_unlock(&ci->i_ceph_lock);
 551         }
 552 }
 553 
 554 static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
 555                                            long long release_count,
 556                                            long long ordered_count)
 557 {
 558         /*
 559          * Makes sure operations that setup readdir cache (update page
 560          * cache and i_size) are strongly ordered w.r.t. the following
 561          * atomic64_set() operations.
 562          */
 563         smp_mb();
 564         atomic64_set(&ci->i_complete_seq[0], release_count);
 565         atomic64_set(&ci->i_complete_seq[1], ordered_count);
 566 }
 567 
 568 static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
 569 {
 570         atomic64_inc(&ci->i_release_count);
 571 }
 572 
 573 static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
 574 {
 575         atomic64_inc(&ci->i_ordered_count);
 576 }
 577 
 578 static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
 579 {
 580         return atomic64_read(&ci->i_complete_seq[0]) ==
 581                 atomic64_read(&ci->i_release_count);
 582 }
 583 
 584 static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
 585 {
 586         return  atomic64_read(&ci->i_complete_seq[0]) ==
 587                 atomic64_read(&ci->i_release_count) &&
 588                 atomic64_read(&ci->i_complete_seq[1]) ==
 589                 atomic64_read(&ci->i_ordered_count);
 590 }
 591 
 592 static inline void ceph_dir_clear_complete(struct inode *inode)
 593 {
 594         __ceph_dir_clear_complete(ceph_inode(inode));
 595 }
 596 
 597 static inline void ceph_dir_clear_ordered(struct inode *inode)
 598 {
 599         __ceph_dir_clear_ordered(ceph_inode(inode));
 600 }
 601 
 602 static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
 603 {
 604         bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
 605         smp_rmb();
 606         return ret;
 607 }
 608 
 609 /* find a specific frag @f */
 610 extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
 611                                                 u32 f);
 612 
 613 /*
 614  * choose fragment for value @v.  copy frag content to pfrag, if leaf
 615  * exists
 616  */
 617 extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
 618                             struct ceph_inode_frag *pfrag,
 619                             int *found);
 620 
 621 static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
 622 {
 623         return (struct ceph_dentry_info *)dentry->d_fsdata;
 624 }
 625 
 626 /*
 627  * caps helpers
 628  */
 629 static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
 630 {
 631         return !RB_EMPTY_ROOT(&ci->i_caps);
 632 }
 633 
 634 extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
 635 extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
 636 extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
 637                                     struct ceph_cap *cap);
 638 
 639 static inline int ceph_caps_issued(struct ceph_inode_info *ci)
 640 {
 641         int issued;
 642         spin_lock(&ci->i_ceph_lock);
 643         issued = __ceph_caps_issued(ci, NULL);
 644         spin_unlock(&ci->i_ceph_lock);
 645         return issued;
 646 }
 647 
 648 static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
 649                                         int touch)
 650 {
 651         int r;
 652         spin_lock(&ci->i_ceph_lock);
 653         r = __ceph_caps_issued_mask(ci, mask, touch);
 654         spin_unlock(&ci->i_ceph_lock);
 655         return r;
 656 }
 657 
 658 static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
 659 {
 660         return ci->i_dirty_caps | ci->i_flushing_caps;
 661 }
 662 extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
 663 extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
 664 extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
 665                                   struct ceph_cap_flush **pcf);
 666 
 667 extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
 668                                       struct ceph_cap *ocap, int mask);
 669 extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
 670 extern int __ceph_caps_used(struct ceph_inode_info *ci);
 671 
 672 extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
 673 
 674 /*
 675  * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
 676  */
 677 static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
 678 {
 679         int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
 680         if (w & CEPH_CAP_FILE_BUFFER)
 681                 w |= CEPH_CAP_FILE_EXCL;  /* we want EXCL if dirty data */
 682         return w;
 683 }
 684 
 685 /* what the mds thinks we want */
 686 extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
 687 
 688 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
 689 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
 690 extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
 691                                      struct ceph_mount_options *fsopt);
 692 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
 693                              struct ceph_cap_reservation *ctx, int need);
 694 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
 695                                struct ceph_cap_reservation *ctx);
 696 extern void ceph_reservation_status(struct ceph_fs_client *client,
 697                                     int *total, int *avail, int *used,
 698                                     int *reserved, int *min);
 699 
 700 
 701 
 702 /*
 703  * we keep buffered readdir results attached to file->private_data
 704  */
 705 #define CEPH_F_SYNC     1
 706 #define CEPH_F_ATEND    2
 707 
 708 struct ceph_file_info {
 709         short fmode;     /* initialized on open */
 710         short flags;     /* CEPH_F_* */
 711 
 712         spinlock_t rw_contexts_lock;
 713         struct list_head rw_contexts;
 714 
 715         errseq_t meta_err;
 716         u32 filp_gen;
 717         atomic_t num_locks;
 718 };
 719 
 720 struct ceph_dir_file_info {
 721         struct ceph_file_info file_info;
 722 
 723         /* readdir: position within the dir */
 724         u32 frag;
 725         struct ceph_mds_request *last_readdir;
 726 
 727         /* readdir: position within a frag */
 728         unsigned next_offset;  /* offset of next chunk (last_name's + 1) */
 729         char *last_name;       /* last entry in previous chunk */
 730         long long dir_release_count;
 731         long long dir_ordered_count;
 732         int readdir_cache_idx;
 733 
 734         /* used for -o dirstat read() on directory thing */
 735         char *dir_info;
 736         int dir_info_len;
 737 };
 738 
 739 struct ceph_rw_context {
 740         struct list_head list;
 741         struct task_struct *thread;
 742         int caps;
 743 };
 744 
 745 #define CEPH_DEFINE_RW_CONTEXT(_name, _caps)    \
 746         struct ceph_rw_context _name = {        \
 747                 .thread = current,              \
 748                 .caps = _caps,                  \
 749         }
 750 
 751 static inline void ceph_add_rw_context(struct ceph_file_info *cf,
 752                                        struct ceph_rw_context *ctx)
 753 {
 754         spin_lock(&cf->rw_contexts_lock);
 755         list_add(&ctx->list, &cf->rw_contexts);
 756         spin_unlock(&cf->rw_contexts_lock);
 757 }
 758 
 759 static inline void ceph_del_rw_context(struct ceph_file_info *cf,
 760                                        struct ceph_rw_context *ctx)
 761 {
 762         spin_lock(&cf->rw_contexts_lock);
 763         list_del(&ctx->list);
 764         spin_unlock(&cf->rw_contexts_lock);
 765 }
 766 
 767 static inline struct ceph_rw_context*
 768 ceph_find_rw_context(struct ceph_file_info *cf)
 769 {
 770         struct ceph_rw_context *ctx, *found = NULL;
 771         spin_lock(&cf->rw_contexts_lock);
 772         list_for_each_entry(ctx, &cf->rw_contexts, list) {
 773                 if (ctx->thread == current) {
 774                         found = ctx;
 775                         break;
 776                 }
 777         }
 778         spin_unlock(&cf->rw_contexts_lock);
 779         return found;
 780 }
 781 
 782 struct ceph_readdir_cache_control {
 783         struct page  *page;
 784         struct dentry **dentries;
 785         int index;
 786 };
 787 
 788 /*
 789  * A "snap realm" describes a subset of the file hierarchy sharing
 790  * the same set of snapshots that apply to it.  The realms themselves
 791  * are organized into a hierarchy, such that children inherit (some of)
 792  * the snapshots of their parents.
 793  *
 794  * All inodes within the realm that have capabilities are linked into a
 795  * per-realm list.
 796  */
 797 struct ceph_snap_realm {
 798         u64 ino;
 799         struct inode *inode;
 800         atomic_t nref;
 801         struct rb_node node;
 802 
 803         u64 created, seq;
 804         u64 parent_ino;
 805         u64 parent_since;   /* snapid when our current parent became so */
 806 
 807         u64 *prior_parent_snaps;      /* snaps inherited from any parents we */
 808         u32 num_prior_parent_snaps;   /*  had prior to parent_since */
 809         u64 *snaps;                   /* snaps specific to this realm */
 810         u32 num_snaps;
 811 
 812         struct ceph_snap_realm *parent;
 813         struct list_head children;       /* list of child realms */
 814         struct list_head child_item;
 815 
 816         struct list_head empty_item;     /* if i have ref==0 */
 817 
 818         struct list_head dirty_item;     /* if realm needs new context */
 819 
 820         /* the current set of snaps for this realm */
 821         struct ceph_snap_context *cached_context;
 822 
 823         struct list_head inodes_with_caps;
 824         spinlock_t inodes_with_caps_lock;
 825 };
 826 
 827 static inline int default_congestion_kb(void)
 828 {
 829         int congestion_kb;
 830 
 831         /*
 832          * Copied from NFS
 833          *
 834          * congestion size, scale with available memory.
 835          *
 836          *  64MB:    8192k
 837          * 128MB:   11585k
 838          * 256MB:   16384k
 839          * 512MB:   23170k
 840          *   1GB:   32768k
 841          *   2GB:   46340k
 842          *   4GB:   65536k
 843          *   8GB:   92681k
 844          *  16GB:  131072k
 845          *
 846          * This allows larger machines to have larger/more transfers.
 847          * Limit the default to 256M
 848          */
 849         congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
 850         if (congestion_kb > 256*1024)
 851                 congestion_kb = 256*1024;
 852 
 853         return congestion_kb;
 854 }
 855 
 856 
 857 /* super.c */
 858 extern int ceph_force_reconnect(struct super_block *sb);
 859 /* snap.c */
 860 struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
 861                                                u64 ino);
 862 extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
 863                                 struct ceph_snap_realm *realm);
 864 extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
 865                                 struct ceph_snap_realm *realm);
 866 extern int ceph_update_snap_trace(struct ceph_mds_client *m,
 867                                   void *p, void *e, bool deletion,
 868                                   struct ceph_snap_realm **realm_ret);
 869 extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
 870                              struct ceph_mds_session *session,
 871                              struct ceph_msg *msg);
 872 extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
 873 extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
 874                                   struct ceph_cap_snap *capsnap);
 875 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
 876 
 877 extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
 878                                                    u64 snap);
 879 extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
 880                                 struct ceph_snapid_map *sm);
 881 extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
 882 extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
 883 
 884 
 885 /*
 886  * a cap_snap is "pending" if it is still awaiting an in-progress
 887  * sync write (that may/may not still update size, mtime, etc.).
 888  */
 889 static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
 890 {
 891         return !list_empty(&ci->i_cap_snaps) &&
 892                list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
 893                                ci_item)->writing;
 894 }
 895 
 896 /* inode.c */
 897 extern const struct inode_operations ceph_file_iops;
 898 
 899 extern struct inode *ceph_alloc_inode(struct super_block *sb);
 900 extern void ceph_evict_inode(struct inode *inode);
 901 extern void ceph_free_inode(struct inode *inode);
 902 
 903 extern struct inode *ceph_get_inode(struct super_block *sb,
 904                                     struct ceph_vino vino);
 905 extern struct inode *ceph_get_snapdir(struct inode *parent);
 906 extern int ceph_fill_file_size(struct inode *inode, int issued,
 907                                u32 truncate_seq, u64 truncate_size, u64 size);
 908 extern void ceph_fill_file_time(struct inode *inode, int issued,
 909                                 u64 time_warp_seq, struct timespec64 *ctime,
 910                                 struct timespec64 *mtime,
 911                                 struct timespec64 *atime);
 912 extern int ceph_fill_trace(struct super_block *sb,
 913                            struct ceph_mds_request *req);
 914 extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
 915                                     struct ceph_mds_session *session);
 916 
 917 extern int ceph_inode_holds_cap(struct inode *inode, int mask);
 918 
 919 extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
 920 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
 921 extern void ceph_queue_vmtruncate(struct inode *inode);
 922 extern void ceph_queue_invalidate(struct inode *inode);
 923 extern void ceph_queue_writeback(struct inode *inode);
 924 extern void ceph_async_iput(struct inode *inode);
 925 
 926 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
 927                              int mask, bool force);
 928 static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
 929 {
 930         return __ceph_do_getattr(inode, NULL, mask, force);
 931 }
 932 extern int ceph_permission(struct inode *inode, int mask);
 933 extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
 934 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
 935 extern int ceph_getattr(const struct path *path, struct kstat *stat,
 936                         u32 request_mask, unsigned int flags);
 937 
 938 /* xattr.c */
 939 int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
 940 ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
 941 extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
 942 extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
 943 extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
 944 extern const struct xattr_handler *ceph_xattr_handlers[];
 945 
 946 struct ceph_acl_sec_ctx {
 947 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 948         void *default_acl;
 949         void *acl;
 950 #endif
 951 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
 952         void *sec_ctx;
 953         u32 sec_ctxlen;
 954 #endif
 955         struct ceph_pagelist *pagelist;
 956 };
 957 
 958 #ifdef CONFIG_SECURITY
 959 extern bool ceph_security_xattr_deadlock(struct inode *in);
 960 extern bool ceph_security_xattr_wanted(struct inode *in);
 961 #else
 962 static inline bool ceph_security_xattr_deadlock(struct inode *in)
 963 {
 964         return false;
 965 }
 966 static inline bool ceph_security_xattr_wanted(struct inode *in)
 967 {
 968         return false;
 969 }
 970 #endif
 971 
 972 #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
 973 extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
 974                                      struct ceph_acl_sec_ctx *ctx);
 975 static inline void ceph_security_invalidate_secctx(struct inode *inode)
 976 {
 977         security_inode_invalidate_secctx(inode);
 978 }
 979 #else
 980 static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
 981                                             struct ceph_acl_sec_ctx *ctx)
 982 {
 983         return 0;
 984 }
 985 static inline void ceph_security_invalidate_secctx(struct inode *inode)
 986 {
 987 }
 988 #endif
 989 
 990 void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
 991 
 992 /* acl.c */
 993 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 994 
 995 struct posix_acl *ceph_get_acl(struct inode *, int);
 996 int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 997 int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
 998                        struct ceph_acl_sec_ctx *as_ctx);
 999 void ceph_init_inode_acls(struct inode *inode,
1000                           struct ceph_acl_sec_ctx *as_ctx);
1001 
1002 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1003 {
1004        forget_all_cached_acls(inode);
1005 }
1006 
1007 #else
1008 
1009 #define ceph_get_acl NULL
1010 #define ceph_set_acl NULL
1011 
1012 static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
1013                                      struct ceph_acl_sec_ctx *as_ctx)
1014 {
1015         return 0;
1016 }
1017 static inline void ceph_init_inode_acls(struct inode *inode,
1018                                         struct ceph_acl_sec_ctx *as_ctx)
1019 {
1020 }
1021 static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
1022 {
1023         return 0;
1024 }
1025 
1026 static inline void ceph_forget_all_cached_acls(struct inode *inode)
1027 {
1028 }
1029 
1030 #endif
1031 
1032 /* caps.c */
1033 extern const char *ceph_cap_string(int c);
1034 extern void ceph_handle_caps(struct ceph_mds_session *session,
1035                              struct ceph_msg *msg);
1036 extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
1037                                      struct ceph_cap_reservation *ctx);
1038 extern void ceph_add_cap(struct inode *inode,
1039                          struct ceph_mds_session *session, u64 cap_id,
1040                          int fmode, unsigned issued, unsigned wanted,
1041                          unsigned cap, unsigned seq, u64 realmino, int flags,
1042                          struct ceph_cap **new_cap);
1043 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
1044 extern void __ceph_remove_caps(struct ceph_inode_info *ci);
1045 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
1046                          struct ceph_cap *cap);
1047 extern int ceph_is_any_caps(struct inode *inode);
1048 
1049 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
1050 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
1051                       int datasync);
1052 extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
1053                                           struct ceph_mds_session *session);
1054 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
1055                                     struct ceph_mds_session *session);
1056 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
1057                                              int mds);
1058 extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
1059 extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
1060 extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
1061                                        struct ceph_snap_context *snapc);
1062 extern void ceph_flush_snaps(struct ceph_inode_info *ci,
1063                              struct ceph_mds_session **psession);
1064 extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
1065 extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
1066                             struct ceph_mds_session *session);
1067 extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
1068 extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
1069 extern int  ceph_drop_caps_for_unlink(struct inode *inode);
1070 extern int ceph_encode_inode_release(void **p, struct inode *inode,
1071                                      int mds, int drop, int unless, int force);
1072 extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
1073                                       struct inode *dir,
1074                                       int mds, int drop, int unless);
1075 
1076 extern int ceph_get_caps(struct file *filp, int need, int want,
1077                          loff_t endoff, int *got, struct page **pinned_page);
1078 extern int ceph_try_get_caps(struct inode *inode,
1079                              int need, int want, bool nonblock, int *got);
1080 
1081 /* for counting open files by mode */
1082 extern void __ceph_get_fmode(struct ceph_inode_info *ci, int mode);
1083 extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
1084 
1085 /* addr.c */
1086 extern const struct address_space_operations ceph_aops;
1087 extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
1088 extern int ceph_uninline_data(struct file *filp, struct page *locked_page);
1089 extern int ceph_pool_perm_check(struct inode *inode, int need);
1090 extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
1091 
1092 /* file.c */
1093 extern const struct file_operations ceph_file_fops;
1094 
1095 extern int ceph_renew_caps(struct inode *inode);
1096 extern int ceph_open(struct inode *inode, struct file *file);
1097 extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
1098                             struct file *file, unsigned flags, umode_t mode);
1099 extern int ceph_release(struct inode *inode, struct file *filp);
1100 extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
1101                                   char *data, size_t len);
1102 
1103 /* dir.c */
1104 extern const struct file_operations ceph_dir_fops;
1105 extern const struct file_operations ceph_snapdir_fops;
1106 extern const struct inode_operations ceph_dir_iops;
1107 extern const struct inode_operations ceph_snapdir_iops;
1108 extern const struct dentry_operations ceph_dentry_ops;
1109 
1110 extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
1111 extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
1112 extern int ceph_handle_snapdir(struct ceph_mds_request *req,
1113                                struct dentry *dentry, int err);
1114 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
1115                                          struct dentry *dentry, int err);
1116 
1117 extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
1118 extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
1119 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
1120 extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
1121 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
1122 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
1123 
1124 /* ioctl.c */
1125 extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1126 
1127 /* export.c */
1128 extern const struct export_operations ceph_export_ops;
1129 struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
1130 
1131 /* locks.c */
1132 extern __init void ceph_flock_init(void);
1133 extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
1134 extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
1135 extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
1136 extern int ceph_encode_locks_to_buffer(struct inode *inode,
1137                                        struct ceph_filelock *flocks,
1138                                        int num_fcntl_locks,
1139                                        int num_flock_locks);
1140 extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
1141                                   struct ceph_pagelist *pagelist,
1142                                   int num_fcntl_locks, int num_flock_locks);
1143 
1144 /* debugfs.c */
1145 extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
1146 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
1147 
1148 /* quota.c */
1149 static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci)
1150 {
1151         return ci->i_max_files || ci->i_max_bytes;
1152 }
1153 
1154 extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
1155 
1156 static inline void __ceph_update_quota(struct ceph_inode_info *ci,
1157                                        u64 max_bytes, u64 max_files)
1158 {
1159         bool had_quota, has_quota;
1160         had_quota = __ceph_has_any_quota(ci);
1161         ci->i_max_bytes = max_bytes;
1162         ci->i_max_files = max_files;
1163         has_quota = __ceph_has_any_quota(ci);
1164 
1165         if (had_quota != has_quota)
1166                 ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota);
1167 }
1168 
1169 extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
1170                               struct ceph_mds_session *session,
1171                               struct ceph_msg *msg);
1172 extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
1173 extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
1174 extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
1175                                              loff_t newlen);
1176 extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
1177                                                 loff_t newlen);
1178 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
1179                                      struct kstatfs *buf);
1180 extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
1181 
1182 #endif /* _FS_CEPH_SUPER_H */
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root/fs/ceph/super.h

INCLUDED FROM

DEFINITIONS
